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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

Browse Source 
Pull btrfs update from Chris Mason:
 "This is a large pull, with the bulk of the updates coming from:

   - Hole punching

   - send/receive fixes

   - fsync performance

   - Disk format extension allowing more hardlinks inside a single
     directory (btrfs-progs patch required to enable the compat bit for
     this one)

  I'm cooking more unrelated RAID code, but I wanted to make sure this
  original batch makes it in.  The largest updates here are relatively
  old and have been in testing for some time."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (121 commits)
  btrfs: init ref_index to zero in add_inode_ref
  Btrfs: remove repeated eb->pages check in, disk-io.c/csum_dirty_buffer
  Btrfs: fix page leakage
  Btrfs: do not warn_on when we cannot alloc a page for an extent buffer
  Btrfs: don't bug on enomem in readpage
  Btrfs: cleanup pages properly when ENOMEM in compression
  Btrfs: make filesystem read-only when submitting barrier fails
  Btrfs: detect corrupted filesystem after write I/O errors
  Btrfs: make compress and nodatacow mount options mutually exclusive
  btrfs: fix message printing
  Btrfs: don't bother committing delayed inode updates when fsyncing
  btrfs: move inline function code to header file
  Btrfs: remove unnecessary IS_ERR in bio_readpage_error()
  btrfs: remove unused function btrfs_insert_some_items()
  Btrfs: don't commit instead of overcommitting
  Btrfs: confirmation of value is added before trace_btrfs_get_extent() is called
  Btrfs: be smarter about dropping things from the tree log
  Btrfs: don't lookup csums for prealloc extents
  Btrfs: cache extent state when writing out dirty metadata pages
  Btrfs: do not hold the file extent leaf locked when adding extent item
  ...
This commit is contained in:
Linus Torvalds 2012-10-10 10:49:20 +09:00
commit 72055425e5
39 changed files with 3579 additions and 1624 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

281
fs/btrfs/backref.c
View File

@ -16,6 +16,7 @@
* Boston, MA 021110-1307, USA.
*/
#include <linux/vmalloc.h>
#include "ctree.h"
#include "disk-io.h"
#include "backref.h"
@ -231,7 +232,7 @@ static int add_all_parents(struct btrfs_root *root, struct btrfs_path *path,
}
if (!ret) {
ret = ulist_add(parents, eb->start,
(unsigned long)eie, GFP_NOFS);
(uintptr_t)eie, GFP_NOFS);
if (ret < 0)
break;
if (!extent_item_pos) {
@ -363,8 +364,8 @@ static int __resolve_indirect_refs(struct btrfs_fs_info *fs_info,
ULIST_ITER_INIT(&uiter);
node = ulist_next(parents, &uiter);
ref->parent = node ? node->val : 0;
ref->inode_list =
node ? (struct extent_inode_elem *)node->aux : 0;
ref->inode_list = node ?
(struct extent_inode_elem *)(uintptr_t)node->aux : 0;
/* additional parents require new refs being added here */
while ((node = ulist_next(parents, &uiter))) {
@ -375,8 +376,8 @@ static int __resolve_indirect_refs(struct btrfs_fs_info *fs_info,
}
memcpy(new_ref, ref, sizeof(*ref));
new_ref->parent = node->val;
new_ref->inode_list =
(struct extent_inode_elem *)node->aux;
new_ref->inode_list = (struct extent_inode_elem *)
(uintptr_t)node->aux;
list_add(&new_ref->list, &ref->list);
}
ulist_reinit(parents);
@ -914,8 +915,8 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
free_extent_buffer(eb);
}
ret = ulist_add_merge(refs, ref->parent,
(unsigned long)ref->inode_list,
(unsigned long *)&eie, GFP_NOFS);
(uintptr_t)ref->inode_list,
(u64 *)&eie, GFP_NOFS);
if (!ret && extent_item_pos) {
/*
* we've recorded that parent, so we must extend
@ -959,7 +960,7 @@ static void free_leaf_list(struct ulist *blocks)
while ((node = ulist_next(blocks, &uiter))) {
if (!node->aux)
continue;
eie = (struct extent_inode_elem *)node->aux;
eie = (struct extent_inode_elem *)(uintptr_t)node->aux;
for (; eie; eie = eie_next) {
eie_next = eie->next;
kfree(eie);
@ -1108,26 +1109,80 @@ static int inode_ref_info(u64 inum, u64 ioff, struct btrfs_root *fs_root,
found_key);
}
int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
u64 start_off, struct btrfs_path *path,
struct btrfs_inode_extref **ret_extref,
u64 *found_off)
{
int ret, slot;
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_inode_extref *extref;
struct extent_buffer *leaf;
unsigned long ptr;
key.objectid = inode_objectid;
btrfs_set_key_type(&key, BTRFS_INODE_EXTREF_KEY);
key.offset = start_off;
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
return ret;
while (1) {
leaf = path->nodes[0];
slot = path->slots[0];
if (slot >= btrfs_header_nritems(leaf)) {
/*
* this iterates to turn a btrfs_inode_ref into a full filesystem path. elements
* of the path are separated by '/' and the path is guaranteed to be
* 0-terminated. the path is only given within the current file system.
* Therefore, it never starts with a '/'. the caller is responsible to provide
* "size" bytes in "dest". the dest buffer will be filled backwards. finally,
* the start point of the resulting string is returned. this pointer is within
* dest, normally.
* in case the path buffer would overflow, the pointer is decremented further
* as if output was written to the buffer, though no more output is actually
* generated. that way, the caller can determine how much space would be
* required for the path to fit into the buffer. in that case, the returned
* value will be smaller than dest. callers must check this!
* If the item at offset is not found,
* btrfs_search_slot will point us to the slot
* where it should be inserted. In our case
* that will be the slot directly before the
* next INODE_REF_KEY_V2 item. In the case
* that we're pointing to the last slot in a
* leaf, we must move one leaf over.
*/
char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
struct btrfs_inode_ref *iref,
ret = btrfs_next_leaf(root, path);
if (ret) {
if (ret >= 1)
ret = -ENOENT;
break;
}
continue;
}
btrfs_item_key_to_cpu(leaf, &found_key, slot);
/*
* Check that we're still looking at an extended ref key for
* this particular objectid. If we have different
* objectid or type then there are no more to be found
* in the tree and we can exit.
*/
ret = -ENOENT;
if (found_key.objectid != inode_objectid)
break;
if (btrfs_key_type(&found_key) != BTRFS_INODE_EXTREF_KEY)
break;
ret = 0;
ptr = btrfs_item_ptr_offset(leaf, path->slots[0]);
extref = (struct btrfs_inode_extref *)ptr;
*ret_extref = extref;
if (found_off)
*found_off = found_key.offset;
break;
}
return ret;
}
static char *ref_to_path(struct btrfs_root *fs_root,
struct btrfs_path *path,
u32 name_len, unsigned long name_off,
struct extent_buffer *eb_in, u64 parent,
char *dest, u32 size)
{
u32 len;
int slot;
u64 next_inum;
int ret;
@ -1135,17 +1190,17 @@ char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
struct extent_buffer *eb = eb_in;
struct btrfs_key found_key;
int leave_spinning = path->leave_spinning;
struct btrfs_inode_ref *iref;
if (bytes_left >= 0)
dest[bytes_left] = '\0';
path->leave_spinning = 1;
while (1) {
len = btrfs_inode_ref_name_len(eb, iref);
bytes_left -= len;
bytes_left -= name_len;
if (bytes_left >= 0)
read_extent_buffer(eb, dest + bytes_left,
(unsigned long)(iref + 1), len);
name_off, name_len);
if (eb != eb_in) {
btrfs_tree_read_unlock_blocking(eb);
free_extent_buffer(eb);
@ -1155,6 +1210,7 @@ char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
ret = -ENOENT;
if (ret)
break;
next_inum = found_key.offset;
/* regular exit ahead */
@ -1170,8 +1226,11 @@ char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
}
btrfs_release_path(path);
iref = btrfs_item_ptr(eb, slot, struct btrfs_inode_ref);
name_len = btrfs_inode_ref_name_len(eb, iref);
name_off = (unsigned long)(iref + 1);
parent = next_inum;
--bytes_left;
if (bytes_left >= 0)
@ -1187,13 +1246,40 @@ char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
return dest + bytes_left;
}
/*
* this iterates to turn a btrfs_inode_ref into a full filesystem path. elements
* of the path are separated by '/' and the path is guaranteed to be
* 0-terminated. the path is only given within the current file system.
* Therefore, it never starts with a '/'. the caller is responsible to provide
* "size" bytes in "dest". the dest buffer will be filled backwards. finally,
* the start point of the resulting string is returned. this pointer is within
* dest, normally.
* in case the path buffer would overflow, the pointer is decremented further
* as if output was written to the buffer, though no more output is actually
* generated. that way, the caller can determine how much space would be
* required for the path to fit into the buffer. in that case, the returned
* value will be smaller than dest. callers must check this!
*/
char *btrfs_iref_to_path(struct btrfs_root *fs_root,
struct btrfs_path *path,
struct btrfs_inode_ref *iref,
struct extent_buffer *eb_in, u64 parent,
char *dest, u32 size)
{
return ref_to_path(fs_root, path,
btrfs_inode_ref_name_len(eb_in, iref),
(unsigned long)(iref + 1),
eb_in, parent, dest, size);
}
/*
* this makes the path point to (logical EXTENT_ITEM *)
* returns BTRFS_EXTENT_FLAG_DATA for data, BTRFS_EXTENT_FLAG_TREE_BLOCK for
* tree blocks and <0 on error.
*/
int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
struct btrfs_path *path, struct btrfs_key *found_key)
struct btrfs_path *path, struct btrfs_key *found_key,
u64 *flags_ret)
{
int ret;
u64 flags;
@ -1237,10 +1323,17 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
(unsigned long long)found_key->objectid,
(unsigned long long)found_key->offset,
(unsigned long long)flags, item_size);
WARN_ON(!flags_ret);
if (flags_ret) {
if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK)
return BTRFS_EXTENT_FLAG_TREE_BLOCK;
if (flags & BTRFS_EXTENT_FLAG_DATA)
return BTRFS_EXTENT_FLAG_DATA;
*flags_ret = BTRFS_EXTENT_FLAG_TREE_BLOCK;
else if (flags & BTRFS_EXTENT_FLAG_DATA)
*flags_ret = BTRFS_EXTENT_FLAG_DATA;
else
BUG_ON(1);
return 0;
}
return -EIO;
}
@ -1404,11 +1497,12 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
ULIST_ITER_INIT(&root_uiter);
while (!ret && (root_node = ulist_next(roots, &root_uiter))) {
pr_debug("root %llu references leaf %llu, data list "
"%#lx\n", root_node->val, ref_node->val,
ref_node->aux);
ret = iterate_leaf_refs(
(struct extent_inode_elem *)ref_node->aux,
root_node->val, extent_item_objectid,
"%#llx\n", root_node->val, ref_node->val,
(long long)ref_node->aux);
ret = iterate_leaf_refs((struct extent_inode_elem *)
(uintptr_t)ref_node->aux,
root_node->val,
extent_item_objectid,
iterate, ctx);
}
ulist_free(roots);
@ -1432,15 +1526,15 @@ int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
{
int ret;
u64 extent_item_pos;
u64 flags = 0;
struct btrfs_key found_key;
int search_commit_root = path->search_commit_root;
ret = extent_from_logical(fs_info, logical, path,
&found_key);
ret = extent_from_logical(fs_info, logical, path, &found_key, &flags);
btrfs_release_path(path);
if (ret < 0)
return ret;
if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK)
if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK)
return -EINVAL;
extent_item_pos = logical - found_key.objectid;
@ -1451,7 +1545,10 @@ int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
return ret;
}
static int iterate_irefs(u64 inum, struct btrfs_root *fs_root,
typedef int (iterate_irefs_t)(u64 parent, u32 name_len, unsigned long name_off,
struct extent_buffer *eb, void *ctx);
static int iterate_inode_refs(u64 inum, struct btrfs_root *fs_root,
struct btrfs_path *path,
iterate_irefs_t *iterate, void *ctx)
{
@ -1498,7 +1595,8 @@ static int iterate_irefs(u64 inum, struct btrfs_root *fs_root,
"tree %llu\n", cur,
(unsigned long long)found_key.objectid,
(unsigned long long)fs_root->objectid);
ret = iterate(parent, iref, eb, ctx);
ret = iterate(parent, name_len,
(unsigned long)(iref + 1), eb, ctx);
if (ret)
break;
len = sizeof(*iref) + name_len;
@ -1513,11 +1611,97 @@ static int iterate_irefs(u64 inum, struct btrfs_root *fs_root,
return ret;
}
static int iterate_inode_extrefs(u64 inum, struct btrfs_root *fs_root,
struct btrfs_path *path,
iterate_irefs_t *iterate, void *ctx)
{
int ret;
int slot;
u64 offset = 0;
u64 parent;
int found = 0;
struct extent_buffer *eb;
struct btrfs_inode_extref *extref;
struct extent_buffer *leaf;
u32 item_size;
u32 cur_offset;
unsigned long ptr;
while (1) {
ret = btrfs_find_one_extref(fs_root, inum, offset, path, &extref,
&offset);
if (ret < 0)
break;
if (ret) {
ret = found ? 0 : -ENOENT;
break;
}
++found;
slot = path->slots[0];
eb = path->nodes[0];
/* make sure we can use eb after releasing the path */
atomic_inc(&eb->refs);
btrfs_tree_read_lock(eb);
btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
btrfs_release_path(path);
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, path->slots[0]);
ptr = btrfs_item_ptr_offset(leaf, path->slots[0]);
cur_offset = 0;
while (cur_offset < item_size) {
u32 name_len;
extref = (struct btrfs_inode_extref *)(ptr + cur_offset);
parent = btrfs_inode_extref_parent(eb, extref);
name_len = btrfs_inode_extref_name_len(eb, extref);
ret = iterate(parent, name_len,
(unsigned long)&extref->name, eb, ctx);
if (ret)
break;
cur_offset += btrfs_inode_extref_name_len(leaf, extref);
cur_offset += sizeof(*extref);
}
btrfs_tree_read_unlock_blocking(eb);
free_extent_buffer(eb);
offset++;
}
btrfs_release_path(path);
return ret;
}
static int iterate_irefs(u64 inum, struct btrfs_root *fs_root,
struct btrfs_path *path, iterate_irefs_t *iterate,
void *ctx)
{
int ret;
int found_refs = 0;
ret = iterate_inode_refs(inum, fs_root, path, iterate, ctx);
if (!ret)
++found_refs;
else if (ret != -ENOENT)
return ret;
ret = iterate_inode_extrefs(inum, fs_root, path, iterate, ctx);
if (ret == -ENOENT && found_refs)
return 0;
return ret;
}
/*
* returns 0 if the path could be dumped (probably truncated)
* returns <0 in case of an error
*/
static int inode_to_path(u64 inum, struct btrfs_inode_ref *iref,
static int inode_to_path(u64 inum, u32 name_len, unsigned long name_off,
struct extent_buffer *eb, void *ctx)
{
struct inode_fs_paths *ipath = ctx;
@ -1531,20 +1715,17 @@ static int inode_to_path(u64 inum, struct btrfs_inode_ref *iref,
ipath->fspath->bytes_left - s_ptr : 0;
fspath_min = (char *)ipath->fspath->val + (i + 1) * s_ptr;
fspath = btrfs_iref_to_path(ipath->fs_root, ipath->btrfs_path, iref, eb,
inum, fspath_min, bytes_left);
fspath = ref_to_path(ipath->fs_root, ipath->btrfs_path, name_len,
name_off, eb, inum, fspath_min,
bytes_left);
if (IS_ERR(fspath))
return PTR_ERR(fspath);
if (fspath > fspath_min) {
pr_debug("path resolved: %s\n", fspath);
ipath->fspath->val[i] = (u64)(unsigned long)fspath;
++ipath->fspath->elem_cnt;
ipath->fspath->bytes_left = fspath - fspath_min;
} else {
pr_debug("missed path, not enough space. missing bytes: %lu, "
"constructed so far: %s\n",
(unsigned long)(fspath_min - fspath), fspath_min);
++ipath->fspath->elem_missed;
ipath->fspath->bytes_missing += fspath_min - fspath;
ipath->fspath->bytes_left = 0;
@ -1575,7 +1756,7 @@ struct btrfs_data_container *init_data_container(u32 total_bytes)
size_t alloc_bytes;
alloc_bytes = max_t(size_t, total_bytes, sizeof(*data));
data = kmalloc(alloc_bytes, GFP_NOFS);
data = vmalloc(alloc_bytes);
if (!data)
return ERR_PTR(-ENOMEM);
@ -1626,6 +1807,6 @@ void free_ipath(struct inode_fs_paths *ipath)
{
if (!ipath)
return;
kfree(ipath->fspath);
vfree(ipath->fspath);
kfree(ipath);
}

10
fs/btrfs/backref.h
View File

@ -33,14 +33,13 @@ struct inode_fs_paths {
typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
void *ctx);
typedef int (iterate_irefs_t)(u64 parent, struct btrfs_inode_ref *iref,
struct extent_buffer *eb, void *ctx);
int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root,
struct btrfs_path *path);
int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
struct btrfs_path *path, struct btrfs_key *found_key);
struct btrfs_path *path, struct btrfs_key *found_key,
u64 *flags);
int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
struct btrfs_extent_item *ei, u32 item_size,
@ -69,4 +68,9 @@ struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
struct btrfs_path *path);
void free_ipath(struct inode_fs_paths *ipath);
int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
u64 start_off, struct btrfs_path *path,
struct btrfs_inode_extref **ret_extref,
u64 *found_off);
#endif

15
fs/btrfs/btrfs_inode.h
View File

@ -38,6 +38,7 @@
#define BTRFS_INODE_DELALLOC_META_RESERVED 4
#define BTRFS_INODE_HAS_ORPHAN_ITEM 5
#define BTRFS_INODE_HAS_ASYNC_EXTENT 6
#define BTRFS_INODE_NEEDS_FULL_SYNC 7
/* in memory btrfs inode */
struct btrfs_inode {
@ -143,6 +144,9 @@ struct btrfs_inode {
/* flags field from the on disk inode */
u32 flags;
/* a local copy of root's last_log_commit */
unsigned long last_log_commit;
/*
* Counters to keep track of the number of extent item's we may use due
* to delalloc and such. outstanding_extents is the number of extent
@ -202,15 +206,10 @@ static inline bool btrfs_is_free_space_inode(struct inode *inode)
static inline int btrfs_inode_in_log(struct inode *inode, u64 generation)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret = 0;
mutex_lock(&root->log_mutex);
if (BTRFS_I(inode)->logged_trans == generation &&
BTRFS_I(inode)->last_sub_trans <= root->last_log_commit)
ret = 1;
mutex_unlock(&root->log_mutex);
return ret;
BTRFS_I(inode)->last_sub_trans <= BTRFS_I(inode)->last_log_commit)
return 1;
return 0;
}
#endif

16
fs/btrfs/check-integrity.c
View File

@ -37,8 +37,9 @@
* the file system was mounted, (i.e., they have been
* referenced by the super block) or they have been
* written since then and the write completion callback
* was called and a FLUSH request to the device where
* these blocks are located was received and completed.
* was called and no write error was indicated and a
* FLUSH request to the device where these blocks are
* located was received and completed.
* 2b. All referenced blocks need to have a generation
* number which is equal to the parent's number.
*
@ -2601,6 +2602,17 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
(unsigned long long)l->block_ref_to->dev_bytenr,
l->block_ref_to->mirror_num);
ret = -1;
} else if (l->block_ref_to->iodone_w_error) {
printk(KERN_INFO "btrfs: attempt to write superblock"
" which references block %c @%llu (%s/%llu/%d)"
" which has write error!\n",
btrfsic_get_block_type(state, l->block_ref_to),
(unsigned long long)
l->block_ref_to->logical_bytenr,
l->block_ref_to->dev_state->name,
(unsigned long long)l->block_ref_to->dev_bytenr,
l->block_ref_to->mirror_num);
ret = -1;
} else if (l->parent_generation !=
l->block_ref_to->generation &&
BTRFSIC_GENERATION_UNKNOWN !=

13
fs/btrfs/compression.c
View File

@ -577,6 +577,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
u64 em_start;
struct extent_map *em;
int ret = -ENOMEM;
int faili = 0;
u32 *sums;
tree = &BTRFS_I(inode)->io_tree;
@ -626,9 +627,13 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
for (pg_index = 0; pg_index < nr_pages; pg_index++) {
cb->compressed_pages[pg_index] = alloc_page(GFP_NOFS |
__GFP_HIGHMEM);
if (!cb->compressed_pages[pg_index])
if (!cb->compressed_pages[pg_index]) {
faili = pg_index - 1;
ret = -ENOMEM;
goto fail2;
}
}
faili = nr_pages - 1;
cb->nr_pages = nr_pages;
add_ra_bio_pages(inode, em_start + em_len, cb);
@ -713,8 +718,10 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
return 0;
fail2:
for (pg_index = 0; pg_index < nr_pages; pg_index++)
free_page((unsigned long)cb->compressed_pages[pg_index]);
while (faili >= 0) {
__free_page(cb->compressed_pages[faili]);
faili--;
}
kfree(cb->compressed_pages);
fail1:

148
fs/btrfs/ctree.c
View File

@ -4401,149 +4401,6 @@ void btrfs_extend_item(struct btrfs_trans_handle *trans,
}
}
/*
* Given a key and some data, insert items into the tree.
* This does all the path init required, making room in the tree if needed.
* Returns the number of keys that were inserted.
*/
int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct btrfs_key *cpu_key, u32 *data_size,
int nr)
{
struct extent_buffer *leaf;
struct btrfs_item *item;
int ret = 0;
int slot;
int i;
u32 nritems;
u32 total_data = 0;
u32 total_size = 0;
unsigned int data_end;
struct btrfs_disk_key disk_key;
struct btrfs_key found_key;
struct btrfs_map_token token;
btrfs_init_map_token(&token);
for (i = 0; i < nr; i++) {
if (total_size + data_size[i] + sizeof(struct btrfs_item) >
BTRFS_LEAF_DATA_SIZE(root)) {
break;
nr = i;
}
total_data += data_size[i];
total_size += data_size[i] + sizeof(struct btrfs_item);
}
BUG_ON(nr == 0);
ret = btrfs_search_slot(trans, root, cpu_key, path, total_size, 1);
if (ret == 0)
return -EEXIST;
if (ret < 0)
goto out;
leaf = path->nodes[0];
nritems = btrfs_header_nritems(leaf);
data_end = leaf_data_end(root, leaf);
if (btrfs_leaf_free_space(root, leaf) < total_size) {
for (i = nr; i >= 0; i--) {
total_data -= data_size[i];
total_size -= data_size[i] + sizeof(struct btrfs_item);
if (total_size < btrfs_leaf_free_space(root, leaf))
break;
}
nr = i;
}
slot = path->slots[0];
BUG_ON(slot < 0);
if (slot != nritems) {
unsigned int old_data = btrfs_item_end_nr(leaf, slot);
item = btrfs_item_nr(leaf, slot);
btrfs_item_key_to_cpu(leaf, &found_key, slot);
/* figure out how many keys we can insert in here */
total_data = data_size[0];
for (i = 1; i < nr; i++) {
if (btrfs_comp_cpu_keys(&found_key, cpu_key + i) <= 0)
break;
total_data += data_size[i];
}
nr = i;
if (old_data < data_end) {
btrfs_print_leaf(root, leaf);
printk(KERN_CRIT "slot %d old_data %d data_end %d\n",
slot, old_data, data_end);
BUG_ON(1);
}
/*
* item0..itemN ... dataN.offset..dataN.size .. data0.size
*/
/* first correct the data pointers */
for (i = slot; i < nritems; i++) {
u32 ioff;
item = btrfs_item_nr(leaf, i);
ioff = btrfs_token_item_offset(leaf, item, &token);
btrfs_set_token_item_offset(leaf, item,
ioff - total_data, &token);
}
/* shift the items */
memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + nr),
btrfs_item_nr_offset(slot),
(nritems - slot) * sizeof(struct btrfs_item));
/* shift the data */
memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) +
data_end - total_data, btrfs_leaf_data(leaf) +
data_end, old_data - data_end);
data_end = old_data;
} else {
/*
* this sucks but it has to be done, if we are inserting at
* the end of the leaf only insert 1 of the items, since we
* have no way of knowing whats on the next leaf and we'd have
* to drop our current locks to figure it out
*/
nr = 1;
}
/* setup the item for the new data */
for (i = 0; i < nr; i++) {
btrfs_cpu_key_to_disk(&disk_key, cpu_key + i);
btrfs_set_item_key(leaf, &disk_key, slot + i);
item = btrfs_item_nr(leaf, slot + i);
btrfs_set_token_item_offset(leaf, item,
data_end - data_size[i], &token);
data_end -= data_size[i];
btrfs_set_token_item_size(leaf, item, data_size[i], &token);
}
btrfs_set_header_nritems(leaf, nritems + nr);
btrfs_mark_buffer_dirty(leaf);
ret = 0;
if (slot == 0) {
btrfs_cpu_key_to_disk(&disk_key, cpu_key);
fixup_low_keys(trans, root, path, &disk_key, 1);
}
if (btrfs_leaf_free_space(root, leaf) < 0) {
btrfs_print_leaf(root, leaf);
BUG();
}
out:
if (!ret)
ret = nr;
return ret;
}
/*
* this is a helper for btrfs_insert_empty_items, the main goal here is
* to save stack depth by doing the bulk of the work in a function
@ -5073,6 +4930,7 @@ static void tree_move_down(struct btrfs_root *root,
struct btrfs_path *path,
int *level, int root_level)
{
BUG_ON(*level == 0);
path->nodes[*level - 1] = read_node_slot(root, path->nodes[*level],
path->slots[*level]);
path->slots[*level - 1] = 0;
@ -5089,7 +4947,7 @@ static int tree_move_next_or_upnext(struct btrfs_root *root,
path->slots[*level]++;
while (path->slots[*level] == nritems) {
while (path->slots[*level] >= nritems) {
if (*level == root_level)
return -1;
@ -5433,9 +5291,11 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
goto out;
advance_right = ADVANCE;
} else {
WARN_ON(!extent_buffer_uptodate(left_path->nodes[0]));
ret = tree_compare_item(left_root, left_path,
right_path, tmp_buf);
if (ret) {
WARN_ON(!extent_buffer_uptodate(left_path->nodes[0]));
ret = changed_cb(left_root, right_root,
left_path, right_path,
&left_key,

101
fs/btrfs/ctree.h
View File

@ -154,6 +154,13 @@ struct btrfs_ordered_sum;
*/
#define BTRFS_NAME_LEN 255
/*
* Theoretical limit is larger, but we keep this down to a sane
* value. That should limit greatly the possibility of collisions on
* inode ref items.
*/
#define BTRFS_LINK_MAX 65535U
/* 32 bytes in various csum fields */
#define BTRFS_CSUM_SIZE 32
@ -489,6 +496,8 @@ struct btrfs_super_block {
*/
#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
#define BTRFS_FEATURE_INCOMPAT_SUPP \
@ -496,7 +505,8 @@ struct btrfs_super_block {
BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
/*
* A leaf is full of items. offset and size tell us where to find
@ -643,6 +653,14 @@ struct btrfs_inode_ref {
/* name goes here */
} __attribute__ ((__packed__));
struct btrfs_inode_extref {
__le64 parent_objectid;
__le64 index;
__le16 name_len;
__u8 name[0];
/* name goes here */
} __attribute__ ((__packed__));
struct btrfs_timespec {
__le64 sec;
__le32 nsec;
@ -1028,12 +1046,22 @@ struct btrfs_space_info {
wait_queue_head_t wait;
};
#define BTRFS_BLOCK_RSV_GLOBAL 1
#define BTRFS_BLOCK_RSV_DELALLOC 2
#define BTRFS_BLOCK_RSV_TRANS 3
#define BTRFS_BLOCK_RSV_CHUNK 4
#define BTRFS_BLOCK_RSV_DELOPS 5
#define BTRFS_BLOCK_RSV_EMPTY 6
#define BTRFS_BLOCK_RSV_TEMP 7
struct btrfs_block_rsv {
u64 size;
u64 reserved;
struct btrfs_space_info *space_info;
spinlock_t lock;
unsigned int full;
unsigned short full;
unsigned short type;
unsigned short failfast;
};
/*
@ -1127,6 +1155,9 @@ struct btrfs_block_group_cache {
* Today it will only have one thing on it, but that may change
*/
struct list_head cluster_list;
/* For delayed block group creation */
struct list_head new_bg_list;
};
/* delayed seq elem */
@ -1240,7 +1271,6 @@ struct btrfs_fs_info {
struct mutex reloc_mutex;
struct list_head trans_list;
struct list_head hashers;
struct list_head dead_roots;
struct list_head caching_block_groups;
@ -1366,9 +1396,6 @@ struct btrfs_fs_info {
struct rb_root defrag_inodes;
atomic_t defrag_running;
spinlock_t ref_cache_lock;
u64 total_ref_cache_size;
/*
* these three are in extended format (availability of single
* chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
@ -1441,6 +1468,8 @@ struct btrfs_fs_info {
/* next backup root to be overwritten */
int backup_root_index;
int num_tolerated_disk_barrier_failures;
};
/*
@ -1481,9 +1510,9 @@ struct btrfs_root {
wait_queue_head_t log_commit_wait[2];
atomic_t log_writers;
atomic_t log_commit[2];
atomic_t log_batch;
unsigned long log_transid;
unsigned long last_log_commit;
unsigned long log_batch;
pid_t log_start_pid;
bool log_multiple_pids;
@ -1592,6 +1621,7 @@ struct btrfs_ioctl_defrag_range_args {
*/
#define BTRFS_INODE_ITEM_KEY 1
#define BTRFS_INODE_REF_KEY 12
#define BTRFS_INODE_EXTREF_KEY 13
#define BTRFS_XATTR_ITEM_KEY 24
#define BTRFS_ORPHAN_ITEM_KEY 48
/* reserve 2-15 close to the inode for later flexibility */
@ -1978,6 +2008,13 @@ BTRFS_SETGET_STACK_FUNCS(block_group_flags,
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
/* struct btrfs_inode_extref */
BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
parent_objectid, 64);
BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
name_len, 16);
BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
@ -2858,6 +2895,8 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
u64 size);
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 group_start);
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
@ -2874,8 +2913,9 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
unsigned short type);
void btrfs_free_block_rsv(struct btrfs_root *root,
struct btrfs_block_rsv *rsv);
int btrfs_block_rsv_add(struct btrfs_root *root,
@ -3172,12 +3212,12 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
const char *name, int name_len,
u64 inode_objectid, u64 ref_objectid, u64 *index);
struct btrfs_inode_ref *
btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
const char *name, int name_len,
u64 inode_objectid, u64 ref_objectid, int mod);
u64 inode_objectid, u64 ref_objectid, int mod,
u64 *ret_index);
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, u64 objectid);
@ -3185,6 +3225,19 @@ int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path,
struct btrfs_key *location, int mod);
struct btrfs_inode_extref *
btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
const char *name, int name_len,
u64 inode_objectid, u64 ref_objectid, int ins_len,
int cow);
int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
u64 ref_objectid, const char *name,
int name_len,
struct btrfs_inode_extref **extref_ret);
/* file-item.c */
int btrfs_del_csums(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 bytenr, u64 len);
@ -3249,6 +3302,8 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *dir, u64 objectid,
const char *name, int name_len);
int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
int front);
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode, u64 new_size,
@ -3308,16 +3363,27 @@ void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
int btrfs_defrag_file(struct inode *inode, struct file *file,
struct btrfs_ioctl_defrag_range_args *range,
u64 newer_than, unsigned long max_pages);
void btrfs_get_block_group_info(struct list_head *groups_list,
struct btrfs_ioctl_space_info *space);
/* file.c */
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
struct inode *inode);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
int skip_pinned);
int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
u64 start, u64 end, int skip_pinned,
int modified);
extern const struct file_operations btrfs_file_operations;
int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
u64 start, u64 end, u64 *hint_byte, int drop_cache);
int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,
struct btrfs_path *path, u64 start, u64 end,
u64 *drop_end, int drop_cache);
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode, u64 start,
u64 end, int drop_cache);
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
struct inode *inode, u64 start, u64 end);
int btrfs_release_file(struct inode *inode, struct file *file);
@ -3378,6 +3444,11 @@ static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
}
}
/*
* Call btrfs_abort_transaction as early as possible when an error condition is
* detected, that way the exact line number is reported.
*/
#define btrfs_abort_transaction(trans, root, errno) \
do { \
__btrfs_abort_transaction(trans, root, __func__, \

6
fs/btrfs/delayed-inode.c
View File

@ -29,7 +29,7 @@ static struct kmem_cache *delayed_node_cache;
int __init btrfs_delayed_inode_init(void)
{
delayed_node_cache = kmem_cache_create("delayed_node",
delayed_node_cache = kmem_cache_create("btrfs_delayed_node",
sizeof(struct btrfs_delayed_node),
0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
@ -650,7 +650,7 @@ static int btrfs_delayed_inode_reserve_metadata(
* we're accounted for.
*/
if (!src_rsv || (!trans->bytes_reserved &&
src_rsv != &root->fs_info->delalloc_block_rsv)) {
src_rsv->type != BTRFS_BLOCK_RSV_DELALLOC)) {
ret = btrfs_block_rsv_add_noflush(root, dst_rsv, num_bytes);
/*
* Since we're under a transaction reserve_metadata_bytes could
@ -668,7 +668,7 @@ static int btrfs_delayed_inode_reserve_metadata(
num_bytes, 1);
}
return ret;
} else if (src_rsv == &root->fs_info->delalloc_block_rsv) {
} else if (src_rsv->type == BTRFS_BLOCK_RSV_DELALLOC) {
spin_lock(&BTRFS_I(inode)->lock);
if (test_and_clear_bit(BTRFS_INODE_DELALLOC_META_RESERVED,
&BTRFS_I(inode)->runtime_flags)) {

224
fs/btrfs/disk-io.c
View File

@ -46,6 +46,10 @@
#include "check-integrity.h"
#include "rcu-string.h"
#ifdef CONFIG_X86
#include <asm/cpufeature.h>
#endif
static struct extent_io_ops btree_extent_io_ops;
static void end_workqueue_fn(struct btrfs_work *work);
static void free_fs_root(struct btrfs_root *root);
@ -217,26 +221,16 @@ static struct extent_map *btree_get_extent(struct inode *inode,
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
if (ret == -EEXIST) {
u64 failed_start = em->start;
u64 failed_len = em->len;
free_extent_map(em);
em = lookup_extent_mapping(em_tree, start, len);
if (em) {
ret = 0;
} else {
em = lookup_extent_mapping(em_tree, failed_start,
failed_len);
ret = -EIO;
}
if (!em)
em = ERR_PTR(-EIO);
} else if (ret) {
free_extent_map(em);
em = NULL;
em = ERR_PTR(ret);
}
write_unlock(&em_tree->lock);
if (ret)
em = ERR_PTR(ret);
out:
return em;
}
@ -439,10 +433,6 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
WARN_ON(1);
return 0;
}
if (eb->pages[0] != page) {
WARN_ON(1);
return 0;
}
if (!PageUptodate(page)) {
WARN_ON(1);
return 0;
@ -869,10 +859,22 @@ static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio,
return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1);
}
static int check_async_write(struct inode *inode, unsigned long bio_flags)
{
if (bio_flags & EXTENT_BIO_TREE_LOG)
return 0;
#ifdef CONFIG_X86
if (cpu_has_xmm4_2)
return 0;
#endif
return 1;
}
static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
int mirror_num, unsigned long bio_flags,
u64 bio_offset)
{
int async = check_async_write(inode, bio_flags);
int ret;
if (!(rw & REQ_WRITE)) {
@ -887,6 +889,12 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
return ret;
return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
mirror_num, 0);
} else if (!async) {
ret = btree_csum_one_bio(bio);
if (ret)
return ret;
return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
mirror_num, 0);
}
/*
@ -1168,8 +1176,8 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
atomic_set(&root->log_commit[0], 0);
atomic_set(&root->log_commit[1], 0);
atomic_set(&root->log_writers, 0);
atomic_set(&root->log_batch, 0);
atomic_set(&root->orphan_inodes, 0);
root->log_batch = 0;
root->log_transid = 0;
root->last_log_commit = 0;
extent_io_tree_init(&root->dirty_log_pages,
@ -1667,8 +1675,9 @@ static int transaction_kthread(void *arg)
spin_unlock(&root->fs_info->trans_lock);
/* If the file system is aborted, this will always fail. */
trans = btrfs_join_transaction(root);
trans = btrfs_attach_transaction(root);
if (IS_ERR(trans)) {
if (PTR_ERR(trans) != -ENOENT)
cannot_commit = true;
goto sleep;
}
@ -1994,13 +2003,11 @@ int open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->trans_list);
INIT_LIST_HEAD(&fs_info->dead_roots);
INIT_LIST_HEAD(&fs_info->delayed_iputs);
INIT_LIST_HEAD(&fs_info->hashers);
INIT_LIST_HEAD(&fs_info->delalloc_inodes);
INIT_LIST_HEAD(&fs_info->ordered_operations);
INIT_LIST_HEAD(&fs_info->caching_block_groups);
spin_lock_init(&fs_info->delalloc_lock);
spin_lock_init(&fs_info->trans_lock);
spin_lock_init(&fs_info->ref_cache_lock);
spin_lock_init(&fs_info->fs_roots_radix_lock);
spin_lock_init(&fs_info->delayed_iput_lock);
spin_lock_init(&fs_info->defrag_inodes_lock);
@ -2014,12 +2021,15 @@ int open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->space_info);
INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
btrfs_mapping_init(&fs_info->mapping_tree);
btrfs_init_block_rsv(&fs_info->global_block_rsv);
btrfs_init_block_rsv(&fs_info->delalloc_block_rsv);
btrfs_init_block_rsv(&fs_info->trans_block_rsv);
btrfs_init_block_rsv(&fs_info->chunk_block_rsv);
btrfs_init_block_rsv(&fs_info->empty_block_rsv);
btrfs_init_block_rsv(&fs_info->delayed_block_rsv);
btrfs_init_block_rsv(&fs_info->global_block_rsv,
BTRFS_BLOCK_RSV_GLOBAL);
btrfs_init_block_rsv(&fs_info->delalloc_block_rsv,
BTRFS_BLOCK_RSV_DELALLOC);
btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS);
btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK);
btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY);
btrfs_init_block_rsv(&fs_info->delayed_block_rsv,
BTRFS_BLOCK_RSV_DELOPS);
atomic_set(&fs_info->nr_async_submits, 0);
atomic_set(&fs_info->async_delalloc_pages, 0);
atomic_set(&fs_info->async_submit_draining, 0);
@ -2491,6 +2501,8 @@ int open_ctree(struct super_block *sb,
printk(KERN_ERR "Failed to read block groups: %d\n", ret);
goto fail_block_groups;
}
fs_info->num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info);
fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root,
"btrfs-cleaner");
@ -2874,10 +2886,8 @@ static int write_dev_flush(struct btrfs_device *device, int wait)
printk_in_rcu("btrfs: disabling barriers on dev %s\n",
rcu_str_deref(device->name));
device->nobarriers = 1;
}
if (!bio_flagged(bio, BIO_UPTODATE)) {
} else if (!bio_flagged(bio, BIO_UPTODATE)) {
ret = -EIO;
if (!bio_flagged(bio, BIO_EOPNOTSUPP))
btrfs_dev_stat_inc_and_print(device,
BTRFS_DEV_STAT_FLUSH_ERRS);
}
@ -2918,14 +2928,15 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
{
struct list_head *head;
struct btrfs_device *dev;
int errors = 0;
int errors_send = 0;
int errors_wait = 0;
int ret;
/* send down all the barriers */
head = &info->fs_devices->devices;
list_for_each_entry_rcu(dev, head, dev_list) {
if (!dev->bdev) {
errors++;
errors_send++;
continue;
}
if (!dev->in_fs_metadata || !dev->writeable)
@ -2933,13 +2944,13 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
ret = write_dev_flush(dev, 0);
if (ret)
errors++;
errors_send++;
}
/* wait for all the barriers */
list_for_each_entry_rcu(dev, head, dev_list) {
if (!dev->bdev) {
errors++;
errors_wait++;
continue;
}
if (!dev->in_fs_metadata || !dev->writeable)
@ -2947,13 +2958,87 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
ret = write_dev_flush(dev, 1);
if (ret)
errors++;
errors_wait++;
}
if (errors)
if (errors_send > info->num_tolerated_disk_barrier_failures ||
errors_wait > info->num_tolerated_disk_barrier_failures)
return -EIO;
return 0;
}
int btrfs_calc_num_tolerated_disk_barrier_failures(
struct btrfs_fs_info *fs_info)
{
struct btrfs_ioctl_space_info space;
struct btrfs_space_info *sinfo;
u64 types[] = {BTRFS_BLOCK_GROUP_DATA,
BTRFS_BLOCK_GROUP_SYSTEM,
BTRFS_BLOCK_GROUP_METADATA,
BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA};
int num_types = 4;
int i;
int c;
int num_tolerated_disk_barrier_failures =
(int)fs_info->fs_devices->num_devices;
for (i = 0; i < num_types; i++) {
struct btrfs_space_info *tmp;
sinfo = NULL;
rcu_read_lock();
list_for_each_entry_rcu(tmp, &fs_info->space_info, list) {
if (tmp->flags == types[i]) {
sinfo = tmp;
break;
}
}
rcu_read_unlock();
if (!sinfo)
continue;
down_read(&sinfo->groups_sem);
for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) {
if (!list_empty(&sinfo->block_groups[c])) {
u64 flags;
btrfs_get_block_group_info(
&sinfo->block_groups[c], &space);
if (space.total_bytes == 0 ||
space.used_bytes == 0)
continue;
flags = space.flags;
/*
* return
* 0: if dup, single or RAID0 is configured for
* any of metadata, system or data, else
* 1: if RAID5 is configured, or if RAID1 or
* RAID10 is configured and only two mirrors
* are used, else
* 2: if RAID6 is configured, else
* num_mirrors - 1: if RAID1 or RAID10 is
* configured and more than
* 2 mirrors are used.
*/
if (num_tolerated_disk_barrier_failures > 0 &&
((flags & (BTRFS_BLOCK_GROUP_DUP |
BTRFS_BLOCK_GROUP_RAID0)) ||
((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK)
== 0)))
num_tolerated_disk_barrier_failures = 0;
else if (num_tolerated_disk_barrier_failures > 1
&&
(flags & (BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10)))
num_tolerated_disk_barrier_failures = 1;
}
}
up_read(&sinfo->groups_sem);
}
return num_tolerated_disk_barrier_failures;
}
int write_all_supers(struct btrfs_root *root, int max_mirrors)
{
struct list_head *head;
@ -2976,8 +3061,16 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors)
mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
head = &root->fs_info->fs_devices->devices;
if (do_barriers)
barrier_all_devices(root->fs_info);
if (do_barriers) {
ret = barrier_all_devices(root->fs_info);
if (ret) {
mutex_unlock(
&root->fs_info->fs_devices->device_list_mutex);
btrfs_error(root->fs_info, ret,
"errors while submitting device barriers.");
return ret;
}
}
list_for_each_entry_rcu(dev, head, dev_list) {
if (!dev->bdev) {
@ -3211,10 +3304,6 @@ int close_ctree(struct btrfs_root *root)
printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n",
(unsigned long long)fs_info->delalloc_bytes);
}
if (fs_info->total_ref_cache_size) {
printk(KERN_INFO "btrfs: at umount reference cache size %llu\n",
(unsigned long long)fs_info->total_ref_cache_size);
}
free_extent_buffer(fs_info->extent_root->node);
free_extent_buffer(fs_info->extent_root->commit_root);
@ -3360,52 +3449,6 @@ int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid)
return btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
}
int btree_lock_page_hook(struct page *page, void *data,
void (*flush_fn)(void *))
{
struct inode *inode = page->mapping->host;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_buffer *eb;
/*
* We culled this eb but the page is still hanging out on the mapping,
* carry on.
*/
if (!PagePrivate(page))
goto out;
eb = (struct extent_buffer *)page->private;
if (!eb) {
WARN_ON(1);
goto out;
}
if (page != eb->pages[0])
goto out;
if (!btrfs_try_tree_write_lock(eb)) {
flush_fn(data);
btrfs_tree_lock(eb);
}
btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) {
spin_lock(&root->fs_info->delalloc_lock);
if (root->fs_info->dirty_metadata_bytes >= eb->len)
root->fs_info->dirty_metadata_bytes -= eb->len;
else
WARN_ON(1);
spin_unlock(&root->fs_info->delalloc_lock);
}
btrfs_tree_unlock(eb);
out:
if (!trylock_page(page)) {
flush_fn(data);
lock_page(page);
}
return 0;
}
static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
int read_only)
{
@ -3608,7 +3651,7 @@ static int btrfs_destroy_marked_extents(struct btrfs_root *root,
while (1) {
ret = find_first_extent_bit(dirty_pages, start, &start, &end,
mark);
mark, NULL);
if (ret)
break;
@ -3663,7 +3706,7 @@ static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
again:
while (1) {
ret = find_first_extent_bit(unpin, 0, &start, &end,
EXTENT_DIRTY);
EXTENT_DIRTY, NULL);
if (ret)
break;
@ -3800,7 +3843,6 @@ int btrfs_cleanup_transaction(struct btrfs_root *root)
}
static struct extent_io_ops btree_extent_io_ops = {
.write_cache_pages_lock_hook = btree_lock_page_hook,
.readpage_end_io_hook = btree_readpage_end_io_hook,
.readpage_io_failed_hook = btree_io_failed_hook,
.submit_bio_hook = btree_submit_bio_hook,

2
fs/btrfs/disk-io.h
View File

@ -95,6 +95,8 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
u64 objectid);
int btree_lock_page_hook(struct page *page, void *data,
void (*flush_fn)(void *));
int btrfs_calc_num_tolerated_disk_barrier_failures(
struct btrfs_fs_info *fs_info);
#ifdef CONFIG_DEBUG_LOCK_ALLOC
void btrfs_init_lockdep(void);

354
fs/btrfs/extent-tree.c
View File

@ -94,8 +94,8 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
u64 flags, struct btrfs_disk_key *key,
int level, struct btrfs_key *ins);
static int do_chunk_alloc(struct btrfs_trans_handle *trans,
struct btrfs_root *extent_root, u64 alloc_bytes,
u64 flags, int force);
struct btrfs_root *extent_root, u64 flags,
int force);
static int find_next_key(struct btrfs_path *path, int level,
struct btrfs_key *key);
static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
@ -312,7 +312,8 @@ static u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
while (start < end) {
ret = find_first_extent_bit(info->pinned_extents, start,
&extent_start, &extent_end,
EXTENT_DIRTY | EXTENT_UPTODATE);
EXTENT_DIRTY | EXTENT_UPTODATE,
NULL);
if (ret)
break;
@ -2361,10 +2362,6 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
}
next:
do_chunk_alloc(trans, fs_info->extent_root,
2 * 1024 * 1024,
btrfs_get_alloc_profile(root, 0),
CHUNK_ALLOC_NO_FORCE);
cond_resched();
spin_lock(&delayed_refs->lock);
}
@ -2478,10 +2475,6 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
if (root == root->fs_info->extent_root)
root = root->fs_info->tree_root;
do_chunk_alloc(trans, root->fs_info->extent_root,
2 * 1024 * 1024, btrfs_get_alloc_profile(root, 0),
CHUNK_ALLOC_NO_FORCE);
btrfs_delayed_refs_qgroup_accounting(trans, root->fs_info);
delayed_refs = &trans->transaction->delayed_refs;
@ -2551,6 +2544,12 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
}
if (run_all) {
if (!list_empty(&trans->new_bgs)) {
spin_unlock(&delayed_refs->lock);
btrfs_create_pending_block_groups(trans, root);
spin_lock(&delayed_refs->lock);
}
node = rb_first(&delayed_refs->root);
if (!node)
goto out;
@ -3406,7 +3405,6 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes)
return PTR_ERR(trans);
ret = do_chunk_alloc(trans, root->fs_info->extent_root,
bytes + 2 * 1024 * 1024,
alloc_target,
CHUNK_ALLOC_NO_FORCE);
btrfs_end_transaction(trans, root);
@ -3488,8 +3486,7 @@ static void force_metadata_allocation(struct btrfs_fs_info *info)
}
static int should_alloc_chunk(struct btrfs_root *root,
struct btrfs_space_info *sinfo, u64 alloc_bytes,
int force)
struct btrfs_space_info *sinfo, int force)
{
struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv;
u64 num_bytes = sinfo->total_bytes - sinfo->bytes_readonly;
@ -3504,6 +3501,7 @@ static int should_alloc_chunk(struct btrfs_root *root,
* and purposes it's used space. Don't worry about locking the
* global_rsv, it doesn't change except when the transaction commits.
*/
if (sinfo->flags & BTRFS_BLOCK_GROUP_METADATA)
num_allocated += global_rsv->size;
/*
@ -3518,15 +3516,8 @@ static int should_alloc_chunk(struct btrfs_root *root,
if (num_bytes - num_allocated < thresh)
return 1;
}
thresh = btrfs_super_total_bytes(root->fs_info->super_copy);
/* 256MB or 2% of the FS */
thresh = max_t(u64, 256 * 1024 * 1024, div_factor_fine(thresh, 2));
/* system chunks need a much small threshold */
if (sinfo->flags & BTRFS_BLOCK_GROUP_SYSTEM)
thresh = 32 * 1024 * 1024;
if (num_bytes > thresh && sinfo->bytes_used < div_factor(num_bytes, 8))
if (num_allocated + 2 * 1024 * 1024 < div_factor(num_bytes, 8))
return 0;
return 1;
}
@ -3576,8 +3567,7 @@ static void check_system_chunk(struct btrfs_trans_handle *trans,
}
static int do_chunk_alloc(struct btrfs_trans_handle *trans,
struct btrfs_root *extent_root, u64 alloc_bytes,
u64 flags, int force)
struct btrfs_root *extent_root, u64 flags, int force)
{
struct btrfs_space_info *space_info;
struct btrfs_fs_info *fs_info = extent_root->fs_info;
@ -3601,7 +3591,7 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans,
return 0;
}
if (!should_alloc_chunk(extent_root, space_info, alloc_bytes, force)) {
if (!should_alloc_chunk(extent_root, space_info, force)) {
spin_unlock(&space_info->lock);
return 0;
} else if (space_info->chunk_alloc) {
@ -3669,6 +3659,46 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans,
return ret;
}
static int can_overcommit(struct btrfs_root *root,
struct btrfs_space_info *space_info, u64 bytes,
int flush)
{
u64 profile = btrfs_get_alloc_profile(root, 0);
u64 avail;
u64 used;
used = space_info->bytes_used + space_info->bytes_reserved +
space_info->bytes_pinned + space_info->bytes_readonly +
space_info->bytes_may_use;
spin_lock(&root->fs_info->free_chunk_lock);
avail = root->fs_info->free_chunk_space;
spin_unlock(&root->fs_info->free_chunk_lock);
/*
* If we have dup, raid1 or raid10 then only half of the free
* space is actually useable.
*/
if (profile & (BTRFS_BLOCK_GROUP_DUP |
BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10))
avail >>= 1;
/*
* If we aren't flushing don't let us overcommit too much, say
* 1/8th of the space. If we can flush, let it overcommit up to
* 1/2 of the space.
*/
if (flush)
avail >>= 3;
else
avail >>= 1;
if (used + bytes < space_info->total_bytes + avail)
return 1;
return 0;
}
/*
* shrink metadata reservation for delalloc
*/
@ -3693,7 +3723,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig,
if (delalloc_bytes == 0) {
if (trans)
return;
btrfs_wait_ordered_extents(root, 0, 0);
btrfs_wait_ordered_extents(root, 0);
return;
}
@ -3703,11 +3733,15 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig,
writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages,
WB_REASON_FS_FREE_SPACE);
/*
* We need to wait for the async pages to actually start before
* we do anything.
*/
wait_event(root->fs_info->async_submit_wait,
!atomic_read(&root->fs_info->async_delalloc_pages));
spin_lock(&space_info->lock);
if (space_info->bytes_used + space_info->bytes_reserved +
space_info->bytes_pinned + space_info->bytes_readonly +
space_info->bytes_may_use + orig <=
space_info->total_bytes) {
if (can_overcommit(root, space_info, orig, !trans)) {
spin_unlock(&space_info->lock);
break;
}
@ -3715,7 +3749,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig,
loops++;
if (wait_ordered && !trans) {
btrfs_wait_ordered_extents(root, 0, 0);
btrfs_wait_ordered_extents(root, 0);
} else {
time_left = schedule_timeout_killable(1);
if (time_left)
@ -3784,11 +3818,12 @@ static int may_commit_transaction(struct btrfs_root *root,
}
enum flush_state {
FLUSH_DELALLOC = 1,
FLUSH_DELALLOC_WAIT = 2,
FLUSH_DELAYED_ITEMS_NR = 3,
FLUSH_DELAYED_ITEMS = 4,
COMMIT_TRANS = 5,
FLUSH_DELAYED_ITEMS_NR = 1,
FLUSH_DELAYED_ITEMS = 2,
FLUSH_DELALLOC = 3,
FLUSH_DELALLOC_WAIT = 4,
ALLOC_CHUNK = 5,
COMMIT_TRANS = 6,
};
static int flush_space(struct btrfs_root *root,
@ -3800,11 +3835,6 @@ static int flush_space(struct btrfs_root *root,
int ret = 0;
switch (state) {
case FLUSH_DELALLOC:
case FLUSH_DELALLOC_WAIT:
shrink_delalloc(root, num_bytes, orig_bytes,
state == FLUSH_DELALLOC_WAIT);
break;
case FLUSH_DELAYED_ITEMS_NR:
case FLUSH_DELAYED_ITEMS:
if (state == FLUSH_DELAYED_ITEMS_NR) {
@ -3825,6 +3855,24 @@ static int flush_space(struct btrfs_root *root,
ret = btrfs_run_delayed_items_nr(trans, root, nr);
btrfs_end_transaction(trans, root);
break;
case FLUSH_DELALLOC:
case FLUSH_DELALLOC_WAIT:
shrink_delalloc(root, num_bytes, orig_bytes,
state == FLUSH_DELALLOC_WAIT);
break;
case ALLOC_CHUNK:
trans = btrfs_join_transaction(root);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
break;
}
ret = do_chunk_alloc(trans, root->fs_info->extent_root,
btrfs_get_alloc_profile(root, 0),
CHUNK_ALLOC_NO_FORCE);
btrfs_end_transaction(trans, root);
if (ret == -ENOSPC)
ret = 0;
break;
case COMMIT_TRANS:
ret = may_commit_transaction(root, space_info, orig_bytes, 0);
break;
@ -3856,10 +3904,9 @@ static int reserve_metadata_bytes(struct btrfs_root *root,
struct btrfs_space_info *space_info = block_rsv->space_info;
u64 used;
u64 num_bytes = orig_bytes;
int flush_state = FLUSH_DELALLOC;
int flush_state = FLUSH_DELAYED_ITEMS_NR;
int ret = 0;
bool flushing = false;
bool committed = false;
again:
ret = 0;
@ -3922,58 +3969,13 @@ static int reserve_metadata_bytes(struct btrfs_root *root,
(orig_bytes * 2);
}
if (ret) {
u64 profile = btrfs_get_alloc_profile(root, 0);
u64 avail;
/*
* If we have a lot of space that's pinned, don't bother doing
* the overcommit dance yet and just commit the transaction.
*/
avail = (space_info->total_bytes - space_info->bytes_used) * 8;
do_div(avail, 10);
if (space_info->bytes_pinned >= avail && flush && !committed) {
space_info->flush = 1;
flushing = true;
spin_unlock(&space_info->lock);
ret = may_commit_transaction(root, space_info,
orig_bytes, 1);
if (ret)
goto out;
committed = true;
goto again;
}
spin_lock(&root->fs_info->free_chunk_lock);
avail = root->fs_info->free_chunk_space;
/*
* If we have dup, raid1 or raid10 then only half of the free
* space is actually useable.
*/
if (profile & (BTRFS_BLOCK_GROUP_DUP |
BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10))
avail >>= 1;
/*
* If we aren't flushing don't let us overcommit too much, say
* 1/8th of the space. If we can flush, let it overcommit up to
* 1/2 of the space.
*/
if (flush)
avail >>= 3;
else
avail >>= 1;
spin_unlock(&root->fs_info->free_chunk_lock);
if (used + num_bytes < space_info->total_bytes + avail) {
if (ret && can_overcommit(root, space_info, orig_bytes, flush)) {
space_info->bytes_may_use += orig_bytes;
trace_btrfs_space_reservation(root->fs_info,
"space_info", space_info->flags, orig_bytes, 1);
trace_btrfs_space_reservation(root->fs_info, "space_info",
space_info->flags, orig_bytes,
1);
ret = 0;
}
}
/*
* Couldn't make our reservation, save our place so while we're trying
@ -4114,13 +4116,15 @@ static int block_rsv_migrate_bytes(struct btrfs_block_rsv *src,
return 0;
}
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv)
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type)
{
memset(rsv, 0, sizeof(*rsv));
spin_lock_init(&rsv->lock);
rsv->type = type;
}
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root)
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
unsigned short type)
{
struct btrfs_block_rsv *block_rsv;
struct btrfs_fs_info *fs_info = root->fs_info;
@ -4129,7 +4133,7 @@ struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root)
if (!block_rsv)
return NULL;
btrfs_init_block_rsv(block_rsv);
btrfs_init_block_rsv(block_rsv, type);
block_rsv->space_info = __find_space_info(fs_info,
BTRFS_BLOCK_GROUP_METADATA);
return block_rsv;
@ -4138,6 +4142,8 @@ struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root)
void btrfs_free_block_rsv(struct btrfs_root *root,
struct btrfs_block_rsv *rsv)
{
if (!rsv)
return;
btrfs_block_rsv_release(root, rsv, (u64)-1);
kfree(rsv);
}
@ -4416,10 +4422,10 @@ int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
struct btrfs_block_rsv *src_rsv = get_block_rsv(trans, root);
struct btrfs_block_rsv *dst_rsv = &pending->block_rsv;
/*
* two for root back/forward refs, two for directory entries
* and one for root of the snapshot.
* two for root back/forward refs, two for directory entries,
* one for root of the snapshot and one for parent inode.
*/
u64 num_bytes = btrfs_calc_trans_metadata_size(root, 5);
u64 num_bytes = btrfs_calc_trans_metadata_size(root, 6);
dst_rsv->space_info = src_rsv->space_info;
return block_rsv_migrate_bytes(src_rsv, dst_rsv, num_bytes);
}
@ -5018,7 +5024,7 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
while (1) {
ret = find_first_extent_bit(unpin, 0, &start, &end,
EXTENT_DIRTY);
EXTENT_DIRTY, NULL);
if (ret)
break;
@ -5096,8 +5102,10 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
ret = remove_extent_backref(trans, extent_root, path,
NULL, refs_to_drop,
is_data);
if (ret)
goto abort;
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
btrfs_release_path(path);
path->leave_spinning = 1;
@ -5115,8 +5123,10 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
btrfs_print_leaf(extent_root,
path->nodes[0]);
}
if (ret < 0)
goto abort;
if (ret < 0) {
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
extent_slot = path->slots[0];
}
} else if (ret == -ENOENT) {
@ -5130,7 +5140,8 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
(unsigned long long)owner_objectid,
(unsigned long long)owner_offset);
} else {
goto abort;
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
leaf = path->nodes[0];
@ -5140,8 +5151,10 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
BUG_ON(found_extent || extent_slot != path->slots[0]);
ret = convert_extent_item_v0(trans, extent_root, path,
owner_objectid, 0);
if (ret < 0)
goto abort;
if (ret < 0) {
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
btrfs_release_path(path);
path->leave_spinning = 1;
@ -5158,8 +5171,11 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
(unsigned long long)bytenr);
btrfs_print_leaf(extent_root, path->nodes[0]);
}
if (ret < 0)
goto abort;
if (ret < 0) {
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
extent_slot = path->slots[0];
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, extent_slot);
@ -5196,8 +5212,10 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
ret = remove_extent_backref(trans, extent_root, path,
iref, refs_to_drop,
is_data);
if (ret)
goto abort;
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
}
} else {
if (found_extent) {
@ -5214,27 +5232,29 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
ret = btrfs_del_items(trans, extent_root, path, path->slots[0],
num_to_del);
if (ret)
goto abort;
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
btrfs_release_path(path);
if (is_data) {
ret = btrfs_del_csums(trans, root, bytenr, num_bytes);
if (ret)
goto abort;
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
}
ret = update_block_group(trans, root, bytenr, num_bytes, 0);
if (ret)
goto abort;
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
}
out:
btrfs_free_path(path);
return ret;
abort:
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
/*
@ -5497,8 +5517,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *used_block_group;
u64 search_start = 0;
int empty_cluster = 2 * 1024 * 1024;
int allowed_chunk_alloc = 0;
int done_chunk_alloc = 0;
struct btrfs_space_info *space_info;
int loop = 0;
int index = 0;
@ -5530,9 +5548,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
if (btrfs_mixed_space_info(space_info))
use_cluster = false;
if (orig_root->ref_cows || empty_size)
allowed_chunk_alloc = 1;
if (data & BTRFS_BLOCK_GROUP_METADATA && use_cluster) {
last_ptr = &root->fs_info->meta_alloc_cluster;
if (!btrfs_test_opt(root, SSD))
@ -5806,10 +5821,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
trace_btrfs_reserve_extent(orig_root, block_group,
search_start, num_bytes);
if (offset < search_start)
btrfs_add_free_space(used_block_group, offset,
search_start - offset);
BUG_ON(offset > search_start);
if (used_block_group != block_group)
btrfs_put_block_group(used_block_group);
btrfs_put_block_group(block_group);
@ -5842,10 +5853,8 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
index = 0;
loop++;
if (loop == LOOP_ALLOC_CHUNK) {
if (allowed_chunk_alloc) {
ret = do_chunk_alloc(trans, root, num_bytes +
2 * 1024 * 1024, data,
CHUNK_ALLOC_LIMITED);
ret = do_chunk_alloc(trans, root, data,
CHUNK_ALLOC_FORCE);
/*
* Do not bail out on ENOSPC since we
* can do more things.
@ -5855,21 +5864,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
root, ret);
goto out;
}
allowed_chunk_alloc = 0;
if (ret == 1)
done_chunk_alloc = 1;
} else if (!done_chunk_alloc &&
space_info->force_alloc ==
CHUNK_ALLOC_NO_FORCE) {
space_info->force_alloc = CHUNK_ALLOC_LIMITED;
}
/*
* We didn't allocate a chunk, go ahead and drop the
* empty size and loop again.
*/
if (!done_chunk_alloc)
loop = LOOP_NO_EMPTY_SIZE;
}
if (loop == LOOP_NO_EMPTY_SIZE) {
@ -5944,20 +5938,6 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
data = btrfs_get_alloc_profile(root, data);
again:
/*
* the only place that sets empty_size is btrfs_realloc_node, which
* is not called recursively on allocations
*/
if (empty_size || root->ref_cows) {
ret = do_chunk_alloc(trans, root->fs_info->extent_root,
num_bytes + 2 * 1024 * 1024, data,
CHUNK_ALLOC_NO_FORCE);
if (ret < 0 && ret != -ENOSPC) {
btrfs_abort_transaction(trans, root, ret);
return ret;
}
}
WARN_ON(num_bytes < root->sectorsize);
ret = find_free_extent(trans, root, num_bytes, empty_size,
hint_byte, ins, data);
@ -5967,12 +5947,6 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
num_bytes = num_bytes >> 1;
num_bytes = num_bytes & ~(root->sectorsize - 1);
num_bytes = max(num_bytes, min_alloc_size);
ret = do_chunk_alloc(trans, root->fs_info->extent_root,
num_bytes, data, CHUNK_ALLOC_FORCE);
if (ret < 0 && ret != -ENOSPC) {
btrfs_abort_transaction(trans, root, ret);
return ret;
}
if (num_bytes == min_alloc_size)
final_tried = true;
goto again;
@ -6314,7 +6288,7 @@ use_block_rsv(struct btrfs_trans_handle *trans,
ret = block_rsv_use_bytes(block_rsv, blocksize);
if (!ret)
return block_rsv;
if (ret) {
if (ret && !block_rsv->failfast) {
static DEFINE_RATELIMIT_STATE(_rs,
DEFAULT_RATELIMIT_INTERVAL,
/*DEFAULT_RATELIMIT_BURST*/ 2);
@ -7279,7 +7253,7 @@ int btrfs_set_block_group_ro(struct btrfs_root *root,
alloc_flags = update_block_group_flags(root, cache->flags);
if (alloc_flags != cache->flags) {
ret = do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags,
ret = do_chunk_alloc(trans, root, alloc_flags,
CHUNK_ALLOC_FORCE);
if (ret < 0)
goto out;
@ -7289,7 +7263,7 @@ int btrfs_set_block_group_ro(struct btrfs_root *root,
if (!ret)
goto out;
alloc_flags = get_alloc_profile(root, cache->space_info->flags);
ret = do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags,
ret = do_chunk_alloc(trans, root, alloc_flags,
CHUNK_ALLOC_FORCE);
if (ret < 0)
goto out;
@ -7303,7 +7277,7 @@ int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 type)
{
u64 alloc_flags = get_alloc_profile(root, type);
return do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags,
return do_chunk_alloc(trans, root, alloc_flags,
CHUNK_ALLOC_FORCE);
}
@ -7810,6 +7784,34 @@ int btrfs_read_block_groups(struct btrfs_root *root)
return ret;
}
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_block_group_cache *block_group, *tmp;
struct btrfs_root *extent_root = root->fs_info->extent_root;
struct btrfs_block_group_item item;
struct btrfs_key key;
int ret = 0;
list_for_each_entry_safe(block_group, tmp, &trans->new_bgs,
new_bg_list) {
list_del_init(&block_group->new_bg_list);
if (ret)
continue;
spin_lock(&block_group->lock);
memcpy(&item, &block_group->item, sizeof(item));
memcpy(&key, &block_group->key, sizeof(key));
spin_unlock(&block_group->lock);
ret = btrfs_insert_item(trans, extent_root, &key, &item,
sizeof(item));
if (ret)
btrfs_abort_transaction(trans, extent_root, ret);
}
}
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 bytes_used,
u64 type, u64 chunk_objectid, u64 chunk_offset,
@ -7843,6 +7845,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
spin_lock_init(&cache->lock);
INIT_LIST_HEAD(&cache->list);
INIT_LIST_HEAD(&cache->cluster_list);
INIT_LIST_HEAD(&cache->new_bg_list);
btrfs_init_free_space_ctl(cache);
@ -7874,12 +7877,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
ret = btrfs_add_block_group_cache(root->fs_info, cache);
BUG_ON(ret); /* Logic error */
ret = btrfs_insert_item(trans, extent_root, &cache->key, &cache->item,
sizeof(cache->item));
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
return ret;
}
list_add_tail(&cache->new_bg_list, &trans->new_bgs);
set_avail_alloc_bits(extent_root->fs_info, type);

126
fs/btrfs/extent_io.c
View File

@ -45,6 +45,7 @@ struct extent_page_data {
struct bio *bio;
struct extent_io_tree *tree;
get_extent_t *get_extent;
unsigned long bio_flags;
/* tells writepage not to lock the state bits for this range
* it still does the unlocking
@ -64,13 +65,13 @@ tree_fs_info(struct extent_io_tree *tree)
int __init extent_io_init(void)
{
extent_state_cache = kmem_cache_create("extent_state",
extent_state_cache = kmem_cache_create("btrfs_extent_state",
sizeof(struct extent_state), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL);
if (!extent_state_cache)
return -ENOMEM;
extent_buffer_cache = kmem_cache_create("extent_buffers",
extent_buffer_cache = kmem_cache_create("btrfs_extent_buffer",
sizeof(struct extent_buffer), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL);
if (!extent_buffer_cache)
@ -942,6 +943,7 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits,
* @end: the end offset in bytes (inclusive)
* @bits: the bits to set in this range
* @clear_bits: the bits to clear in this range
* @cached_state: state that we're going to cache
* @mask: the allocation mask
*
* This will go through and set bits for the given range. If any states exist
@ -951,7 +953,8 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits,
* boundary bits like LOCK.
*/
int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
int bits, int clear_bits, gfp_t mask)
int bits, int clear_bits,
struct extent_state **cached_state, gfp_t mask)
{
struct extent_state *state;
struct extent_state *prealloc = NULL;
@ -968,6 +971,15 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
}
spin_lock(&tree->lock);
if (cached_state && *cached_state) {
state = *cached_state;
if (state->start <= start && state->end > start &&
state->tree) {
node = &state->rb_node;
goto hit_next;
}
}
/*
* this search will find all the extents that end after
* our range starts.
@ -998,6 +1010,7 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
*/
if (state->start == start && state->end <= end) {
set_state_bits(tree, state, &bits);
cache_state(state, cached_state);
state = clear_state_bit(tree, state, &clear_bits, 0);
if (last_end == (u64)-1)
goto out;
@ -1038,6 +1051,7 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
goto out;
if (state->end <= end) {
set_state_bits(tree, state, &bits);
cache_state(state, cached_state);
state = clear_state_bit(tree, state, &clear_bits, 0);
if (last_end == (u64)-1)
goto out;
@ -1076,6 +1090,7 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
&bits);
if (err)
extent_io_tree_panic(tree, err);
cache_state(prealloc, cached_state);
prealloc = NULL;
start = this_end + 1;
goto search_again;
@ -1098,6 +1113,7 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
extent_io_tree_panic(tree, err);
set_state_bits(tree, prealloc, &bits);
cache_state(prealloc, cached_state);
clear_state_bit(tree, prealloc, &clear_bits, 0);
prealloc = NULL;
goto out;
@ -1150,6 +1166,14 @@ int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
NULL, cached_state, mask);
}
int set_extent_defrag(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state, gfp_t mask)
{
return set_extent_bit(tree, start, end,
EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
NULL, cached_state, mask);
}
int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask)
{
@ -1294,18 +1318,42 @@ struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree,
* If nothing was found, 1 is returned. If found something, return 0.
*/
int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
u64 *start_ret, u64 *end_ret, int bits)
u64 *start_ret, u64 *end_ret, int bits,
struct extent_state **cached_state)
{
struct extent_state *state;
struct rb_node *n;
int ret = 1;
spin_lock(&tree->lock);
if (cached_state && *cached_state) {
state = *cached_state;
if (state->end == start - 1 && state->tree) {
n = rb_next(&state->rb_node);
while (n) {
state = rb_entry(n, struct extent_state,
rb_node);
if (state->state & bits)
goto got_it;
n = rb_next(n);
}
free_extent_state(*cached_state);
*cached_state = NULL;
goto out;
}
free_extent_state(*cached_state);
*cached_state = NULL;
}
state = find_first_extent_bit_state(tree, start, bits);
got_it:
if (state) {
cache_state(state, cached_state);
*start_ret = state->start;
*end_ret = state->end;
ret = 0;
}
out:
spin_unlock(&tree->lock);
return ret;
}
@ -2068,7 +2116,7 @@ static int bio_readpage_error(struct bio *failed_bio, struct page *page,
}
read_unlock(&em_tree->lock);
if (!em || IS_ERR(em)) {
if (!em) {
kfree(failrec);
return -EIO;
}
@ -2304,8 +2352,8 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
struct extent_state *cached = NULL;
struct extent_state *state;
pr_debug("end_bio_extent_readpage: bi_vcnt=%d, idx=%d, err=%d, "
"mirror=%ld\n", bio->bi_vcnt, bio->bi_idx, err,
pr_debug("end_bio_extent_readpage: bi_sector=%llu, err=%d, "
"mirror=%ld\n", (u64)bio->bi_sector, err,
(long int)bio->bi_bdev);
tree = &BTRFS_I(page->mapping->host)->io_tree;
@ -2709,12 +2757,15 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
end_bio_extent_readpage, mirror_num,
*bio_flags,
this_bio_flag);
BUG_ON(ret == -ENOMEM);
if (!ret) {
nr++;
*bio_flags = this_bio_flag;
}
if (ret)
}
if (ret) {
SetPageError(page);
unlock_extent(tree, cur, cur + iosize - 1);
}
cur = cur + iosize;
pg_offset += iosize;
}
@ -3161,12 +3212,16 @@ static int write_one_eb(struct extent_buffer *eb,
struct block_device *bdev = fs_info->fs_devices->latest_bdev;
u64 offset = eb->start;
unsigned long i, num_pages;
unsigned long bio_flags = 0;
int rw = (epd->sync_io ? WRITE_SYNC : WRITE);
int ret = 0;
clear_bit(EXTENT_BUFFER_IOERR, &eb->bflags);
num_pages = num_extent_pages(eb->start, eb->len);
atomic_set(&eb->io_pages, num_pages);
if (btrfs_header_owner(eb) == BTRFS_TREE_LOG_OBJECTID)
bio_flags = EXTENT_BIO_TREE_LOG;
for (i = 0; i < num_pages; i++) {
struct page *p = extent_buffer_page(eb, i);
@ -3175,7 +3230,8 @@ static int write_one_eb(struct extent_buffer *eb,
ret = submit_extent_page(rw, eb->tree, p, offset >> 9,
PAGE_CACHE_SIZE, 0, bdev, &epd->bio,
-1, end_bio_extent_buffer_writepage,
0, 0, 0);
0, epd->bio_flags, bio_flags);
epd->bio_flags = bio_flags;
if (ret) {
set_bit(EXTENT_BUFFER_IOERR, &eb->bflags);
SetPageError(p);
@ -3210,6 +3266,7 @@ int btree_write_cache_pages(struct address_space *mapping,
.tree = tree,
.extent_locked = 0,
.sync_io = wbc->sync_mode == WB_SYNC_ALL,
.bio_flags = 0,
};
int ret = 0;
int done = 0;
@ -3254,20 +3311,35 @@ int btree_write_cache_pages(struct address_space *mapping,
break;
}
spin_lock(&mapping->private_lock);
if (!PagePrivate(page)) {
spin_unlock(&mapping->private_lock);
continue;
}
eb = (struct extent_buffer *)page->private;
/*
* Shouldn't happen and normally this would be a BUG_ON
* but no sense in crashing the users box for something
* we can survive anyway.
*/
if (!eb) {
spin_unlock(&mapping->private_lock);
WARN_ON(1);
continue;
}
if (eb == prev_eb)
continue;
if (!atomic_inc_not_zero(&eb->refs)) {
WARN_ON(1);
if (eb == prev_eb) {
spin_unlock(&mapping->private_lock);
continue;
}
ret = atomic_inc_not_zero(&eb->refs);
spin_unlock(&mapping->private_lock);
if (!ret)
continue;
prev_eb = eb;
ret = lock_extent_buffer_for_io(eb, fs_info, &epd);
if (!ret) {
@ -3457,7 +3529,7 @@ static void flush_epd_write_bio(struct extent_page_data *epd)
if (epd->sync_io)
rw = WRITE_SYNC;
ret = submit_one_bio(rw, epd->bio, 0, 0);
ret = submit_one_bio(rw, epd->bio, 0, epd->bio_flags);
BUG_ON(ret < 0); /* -ENOMEM */
epd->bio = NULL;
}
@ -3480,6 +3552,7 @@ int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
.get_extent = get_extent,
.extent_locked = 0,
.sync_io = wbc->sync_mode == WB_SYNC_ALL,
.bio_flags = 0,
};
ret = __extent_writepage(page, wbc, &epd);
@ -3504,6 +3577,7 @@ int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
.get_extent = get_extent,
.extent_locked = 1,
.sync_io = mode == WB_SYNC_ALL,
.bio_flags = 0,
};
struct writeback_control wbc_writepages = {
.sync_mode = mode,
@ -3543,6 +3617,7 @@ int extent_writepages(struct extent_io_tree *tree,
.get_extent = get_extent,
.extent_locked = 0,
.sync_io = wbc->sync_mode == WB_SYNC_ALL,
.bio_flags = 0,
};
ret = extent_write_cache_pages(tree, mapping, wbc,
@ -3920,18 +3995,6 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
return ret;
}
inline struct page *extent_buffer_page(struct extent_buffer *eb,
unsigned long i)
{
return eb->pages[i];
}
inline unsigned long num_extent_pages(u64 start, u64 len)
{
return ((start + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) -
(start >> PAGE_CACHE_SHIFT);
}
static void __free_extent_buffer(struct extent_buffer *eb)
{
#if LEAK_DEBUG
@ -4047,7 +4110,7 @@ struct extent_buffer *alloc_dummy_extent_buffer(u64 start, unsigned long len)
return eb;
err:
for (i--; i > 0; i--)
for (i--; i >= 0; i--)
__free_page(eb->pages[i]);
__free_extent_buffer(eb);
return NULL;
@ -4192,10 +4255,8 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
for (i = 0; i < num_pages; i++, index++) {
p = find_or_create_page(mapping, index, GFP_NOFS);
if (!p) {
WARN_ON(1);
if (!p)
goto free_eb;
}
spin_lock(&mapping->private_lock);
if (PagePrivate(p)) {
@ -4338,7 +4399,6 @@ static int release_extent_buffer(struct extent_buffer *eb, gfp_t mask)
/* Should be safe to release our pages at this point */
btrfs_release_extent_buffer_page(eb, 0);
call_rcu(&eb->rcu_head, btrfs_release_extent_buffer_rcu);
return 1;
}

23
fs/btrfs/extent_io.h
View File

@ -27,6 +27,7 @@
* type for this bio
*/
#define EXTENT_BIO_COMPRESSED 1
#define EXTENT_BIO_TREE_LOG 2
#define EXTENT_BIO_FLAG_SHIFT 16
/* these are bit numbers for test/set bit */
@ -232,11 +233,15 @@ int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask);
int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
int bits, int clear_bits, gfp_t mask);
int bits, int clear_bits,
struct extent_state **cached_state, gfp_t mask);
int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state, gfp_t mask);
int set_extent_defrag(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state, gfp_t mask);
int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
u64 *start_ret, u64 *end_ret, int bits);
u64 *start_ret, u64 *end_ret, int bits,
struct extent_state **cached_state);
struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree,
u64 start, int bits);
int extent_invalidatepage(struct extent_io_tree *tree,
@ -277,8 +282,18 @@ void free_extent_buffer_stale(struct extent_buffer *eb);
int read_extent_buffer_pages(struct extent_io_tree *tree,
struct extent_buffer *eb, u64 start, int wait,
get_extent_t *get_extent, int mirror_num);
unsigned long num_extent_pages(u64 start, u64 len);
struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i);
static inline unsigned long num_extent_pages(u64 start, u64 len)
{
return ((start + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) -
(start >> PAGE_CACHE_SHIFT);
}
static inline struct page *extent_buffer_page(struct extent_buffer *eb,
unsigned long i)
{
return eb->pages[i];
}
static inline void extent_buffer_get(struct extent_buffer *eb)
{

55
fs/btrfs/extent_map.c
View File

@ -11,7 +11,7 @@ static struct kmem_cache *extent_map_cache;
int __init extent_map_init(void)
{
extent_map_cache = kmem_cache_create("extent_map",
extent_map_cache = kmem_cache_create("btrfs_extent_map",
sizeof(struct extent_map), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL);
if (!extent_map_cache)
@ -35,6 +35,7 @@ void extent_map_exit(void)
void extent_map_tree_init(struct extent_map_tree *tree)
{
tree->map = RB_ROOT;
INIT_LIST_HEAD(&tree->modified_extents);
rwlock_init(&tree->lock);
}
@ -54,7 +55,9 @@ struct extent_map *alloc_extent_map(void)
em->in_tree = 0;
em->flags = 0;
em->compress_type = BTRFS_COMPRESS_NONE;
em->generation = 0;
atomic_set(&em->refs, 1);
INIT_LIST_HEAD(&em->list);
return em;
}
@ -72,6 +75,7 @@ void free_extent_map(struct extent_map *em)
WARN_ON(atomic_read(&em->refs) == 0);
if (atomic_dec_and_test(&em->refs)) {
WARN_ON(em->in_tree);
WARN_ON(!list_empty(&em->list));
kmem_cache_free(extent_map_cache, em);
}
}
@ -198,6 +202,14 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em)
em->block_len += merge->block_len;
em->block_start = merge->block_start;
merge->in_tree = 0;
if (merge->generation > em->generation) {
em->mod_start = em->start;
em->mod_len = em->len;
em->generation = merge->generation;
list_move(&em->list, &tree->modified_extents);
}
list_del_init(&merge->list);
rb_erase(&merge->rb_node, &tree->map);
free_extent_map(merge);
}
@ -211,14 +223,34 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em)
em->block_len += merge->len;
rb_erase(&merge->rb_node, &tree->map);
merge->in_tree = 0;
if (merge->generation > em->generation) {
em->mod_len = em->len;
em->generation = merge->generation;
list_move(&em->list, &tree->modified_extents);
}
list_del_init(&merge->list);
free_extent_map(merge);
}
}
int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len)
/**
* unpint_extent_cache - unpin an extent from the cache
* @tree: tree to unpin the extent in
* @start: logical offset in the file
* @len: length of the extent
* @gen: generation that this extent has been modified in
* @prealloc: if this is set we need to clear the prealloc flag
*
* Called after an extent has been written to disk properly. Set the generation
* to the generation that actually added the file item to the inode so we know
* we need to sync this extent when we call fsync().
*/
int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
u64 gen)
{
int ret = 0;
struct extent_map *em;
bool prealloc = false;
write_lock(&tree->lock);
em = lookup_extent_mapping(tree, start, len);
@ -228,10 +260,24 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len)
if (!em)
goto out;
list_move(&em->list, &tree->modified_extents);
em->generation = gen;
clear_bit(EXTENT_FLAG_PINNED, &em->flags);
em->mod_start = em->start;
em->mod_len = em->len;
if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
prealloc = true;
clear_bit(EXTENT_FLAG_PREALLOC, &em->flags);
}
try_merge_map(tree, em);
if (prealloc) {
em->mod_start = em->start;
em->mod_len = em->len;
}
free_extent_map(em);
out:
write_unlock(&tree->lock);
@ -269,6 +315,9 @@ int add_extent_mapping(struct extent_map_tree *tree,
}
atomic_inc(&em->refs);
em->mod_start = em->start;
em->mod_len = em->len;
try_merge_map(tree, em);
out:
return ret;
@ -358,6 +407,8 @@ int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em)
WARN_ON(test_bit(EXTENT_FLAG_PINNED, &em->flags));
rb_erase(&em->rb_node, &tree->map);
if (!test_bit(EXTENT_FLAG_LOGGING, &em->flags))
list_del_init(&em->list);
em->in_tree = 0;
return ret;
}

8
fs/btrfs/extent_map.h
View File

@ -13,6 +13,7 @@
#define EXTENT_FLAG_COMPRESSED 1
#define EXTENT_FLAG_VACANCY 2 /* no file extent item found */
#define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */
#define EXTENT_FLAG_LOGGING 4 /* Logging this extent */
struct extent_map {
struct rb_node rb_node;
@ -20,18 +21,23 @@ struct extent_map {
/* all of these are in bytes */
u64 start;
u64 len;
u64 mod_start;
u64 mod_len;
u64 orig_start;
u64 block_start;
u64 block_len;
u64 generation;
unsigned long flags;
struct block_device *bdev;
atomic_t refs;
unsigned int in_tree;
unsigned int compress_type;
struct list_head list;
};
struct extent_map_tree {
struct rb_root map;
struct list_head modified_extents;
rwlock_t lock;
};
@ -60,7 +66,7 @@ struct extent_map *alloc_extent_map(void);
void free_extent_map(struct extent_map *em);
int __init extent_map_init(void);
void extent_map_exit(void);
int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len);
int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen);
struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
u64 start, u64 len);
#endif

5
fs/btrfs/file-item.c
View File

@ -25,11 +25,12 @@
#include "transaction.h"
#include "print-tree.h"
#define __MAX_CSUM_ITEMS(r, size) ((((BTRFS_LEAF_DATA_SIZE(r) - \
#define __MAX_CSUM_ITEMS(r, size) ((unsigned long)(((BTRFS_LEAF_DATA_SIZE(r) - \
sizeof(struct btrfs_item) * 2) / \
size) - 1))
#define MAX_CSUM_ITEMS(r, size) (min(__MAX_CSUM_ITEMS(r, size), PAGE_CACHE_SIZE))
#define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \
PAGE_CACHE_SIZE))
#define MAX_ORDERED_SUM_BYTES(r) ((PAGE_SIZE - \
sizeof(struct btrfs_ordered_sum)) / \

445
fs/btrfs/file.c
View File

@ -39,6 +39,7 @@
#include "tree-log.h"
#include "locking.h"
#include "compat.h"
#include "volumes.h"
/*
* when auto defrag is enabled we
@ -458,7 +459,7 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
* this drops all the extents in the cache that intersect the range
* [start, end]. Existing extents are split as required.
*/
int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
int skip_pinned)
{
struct extent_map *em;
@ -466,6 +467,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
struct extent_map *split2 = NULL;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
u64 len = end - start + 1;
u64 gen;
int ret;
int testend = 1;
unsigned long flags;
@ -477,11 +479,14 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
testend = 0;
}
while (1) {
int no_splits = 0;
if (!split)
split = alloc_extent_map();
if (!split2)
split2 = alloc_extent_map();
BUG_ON(!split || !split2); /* -ENOMEM */
if (!split || !split2)
no_splits = 1;
write_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, start, len);
@ -490,6 +495,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
break;
}
flags = em->flags;
gen = em->generation;
if (skip_pinned && test_bit(EXTENT_FLAG_PINNED, &em->flags)) {
if (testend && em->start + em->len >= start + len) {
free_extent_map(em);
@ -506,6 +512,8 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
compressed = test_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
clear_bit(EXTENT_FLAG_PINNED, &em->flags);
remove_extent_mapping(em_tree, em);
if (no_splits)
goto next;
if (em->block_start < EXTENT_MAP_LAST_BYTE &&
em->start < start) {
@ -518,12 +526,13 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
split->block_len = em->block_len;
else
split->block_len = split->len;
split->generation = gen;
split->bdev = em->bdev;
split->flags = flags;
split->compress_type = em->compress_type;
ret = add_extent_mapping(em_tree, split);
BUG_ON(ret); /* Logic error */
list_move(&split->list, &em_tree->modified_extents);
free_extent_map(split);
split = split2;
split2 = NULL;
@ -537,6 +546,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
split->bdev = em->bdev;
split->flags = flags;
split->compress_type = em->compress_type;
split->generation = gen;
if (compressed) {
split->block_len = em->block_len;
@ -550,9 +560,11 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
ret = add_extent_mapping(em_tree, split);
BUG_ON(ret); /* Logic error */
list_move(&split->list, &em_tree->modified_extents);
free_extent_map(split);
split = NULL;
}
next:
write_unlock(&em_tree->lock);
/* once for us */
@ -564,7 +576,6 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
free_extent_map(split);
if (split2)
free_extent_map(split2);
return 0;
}
/*
@ -576,13 +587,13 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
* it is either truncated or split. Anything entirely inside the range
* is deleted from the tree.
*/
int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
u64 start, u64 end, u64 *hint_byte, int drop_cache)
int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,
struct btrfs_path *path, u64 start, u64 end,
u64 *drop_end, int drop_cache)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_buffer *leaf;
struct btrfs_file_extent_item *fi;
struct btrfs_path *path;
struct btrfs_key key;
struct btrfs_key new_key;
u64 ino = btrfs_ino(inode);
@ -597,14 +608,12 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
int recow;
int ret;
int modify_tree = -1;
int update_refs = (root->ref_cows || root == root->fs_info->tree_root);
int found = 0;
if (drop_cache)
btrfs_drop_extent_cache(inode, start, end - 1, 0);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
if (start >= BTRFS_I(inode)->disk_i_size)
modify_tree = 0;
@ -666,6 +675,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
goto next_slot;
}
found = 1;
search_start = max(key.offset, start);
if (recow || !modify_tree) {
modify_tree = -1;
@ -707,14 +717,13 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
extent_end - start);
btrfs_mark_buffer_dirty(leaf);
if (disk_bytenr > 0) {
if (update_refs && disk_bytenr > 0) {
ret = btrfs_inc_extent_ref(trans, root,
disk_bytenr, num_bytes, 0,
root->root_key.objectid,
new_key.objectid,
start - extent_offset, 0);
BUG_ON(ret); /* -ENOMEM */
*hint_byte = disk_bytenr;
}
key.offset = start;
}
@ -734,10 +743,8 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_end - end);
btrfs_mark_buffer_dirty(leaf);
if (disk_bytenr > 0) {
if (update_refs && disk_bytenr > 0)
inode_sub_bytes(inode, end - key.offset);
*hint_byte = disk_bytenr;
}
break;
}
@ -753,10 +760,8 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
btrfs_set_file_extent_num_bytes(leaf, fi,
start - key.offset);
btrfs_mark_buffer_dirty(leaf);
if (disk_bytenr > 0) {
if (update_refs && disk_bytenr > 0)
inode_sub_bytes(inode, extent_end - start);
*hint_byte = disk_bytenr;
}
if (end == extent_end)
break;
@ -777,12 +782,13 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
del_nr++;
}
if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
if (update_refs &&
extent_type == BTRFS_FILE_EXTENT_INLINE) {
inode_sub_bytes(inode,
extent_end - key.offset);
extent_end = ALIGN(extent_end,
root->sectorsize);
} else if (disk_bytenr > 0) {
} else if (update_refs && disk_bytenr > 0) {
ret = btrfs_free_extent(trans, root,
disk_bytenr, num_bytes, 0,
root->root_key.objectid,
@ -791,7 +797,6 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
BUG_ON(ret); /* -ENOMEM */
inode_sub_bytes(inode,
extent_end - key.offset);
*hint_byte = disk_bytenr;
}
if (end == extent_end)
@ -806,7 +811,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
del_nr);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto out;
break;
}
del_nr = 0;
@ -825,7 +830,24 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
btrfs_abort_transaction(trans, root, ret);
}
out:
if (drop_end)
*drop_end = found ? min(end, extent_end) : end;
btrfs_release_path(path);
return ret;
}
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode, u64 start,
u64 end, int drop_cache)
{
struct btrfs_path *path;
int ret;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
ret = __btrfs_drop_extents(trans, root, inode, path, start, end, NULL,
drop_cache);
btrfs_free_path(path);
return ret;
}
@ -892,8 +914,6 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
int ret;
u64 ino = btrfs_ino(inode);
btrfs_drop_extent_cache(inode, start, end - 1, 0);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@ -935,12 +955,16 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
btrfs_set_item_key_safe(trans, root, path, &new_key);
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
btrfs_set_file_extent_generation(leaf, fi,
trans->transid);
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_end - end);
btrfs_set_file_extent_offset(leaf, fi,
end - orig_offset);
fi = btrfs_item_ptr(leaf, path->slots[0] - 1,
struct btrfs_file_extent_item);
btrfs_set_file_extent_generation(leaf, fi,
trans->transid);
btrfs_set_file_extent_num_bytes(leaf, fi,
end - other_start);
btrfs_mark_buffer_dirty(leaf);
@ -958,12 +982,16 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
struct btrfs_file_extent_item);
btrfs_set_file_extent_num_bytes(leaf, fi,
start - key.offset);
btrfs_set_file_extent_generation(leaf, fi,
trans->transid);
path->slots[0]++;
new_key.offset = start;
btrfs_set_item_key_safe(trans, root, path, &new_key);
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
btrfs_set_file_extent_generation(leaf, fi,
trans->transid);
btrfs_set_file_extent_num_bytes(leaf, fi,
other_end - start);
btrfs_set_file_extent_offset(leaf, fi,
@ -991,12 +1019,14 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
leaf = path->nodes[0];
fi = btrfs_item_ptr(leaf, path->slots[0] - 1,
struct btrfs_file_extent_item);
btrfs_set_file_extent_generation(leaf, fi, trans->transid);
btrfs_set_file_extent_num_bytes(leaf, fi,
split - key.offset);
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
btrfs_set_file_extent_generation(leaf, fi, trans->transid);
btrfs_set_file_extent_offset(leaf, fi, split - orig_offset);
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_end - split);
@ -1056,12 +1086,14 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
struct btrfs_file_extent_item);
btrfs_set_file_extent_type(leaf, fi,
BTRFS_FILE_EXTENT_REG);
btrfs_set_file_extent_generation(leaf, fi, trans->transid);
btrfs_mark_buffer_dirty(leaf);
} else {
fi = btrfs_item_ptr(leaf, del_slot - 1,
struct btrfs_file_extent_item);
btrfs_set_file_extent_type(leaf, fi,
BTRFS_FILE_EXTENT_REG);
btrfs_set_file_extent_generation(leaf, fi, trans->transid);
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_end - key.offset);
btrfs_mark_buffer_dirty(leaf);
@ -1173,8 +1205,8 @@ static noinline int prepare_pages(struct btrfs_root *root, struct file *file,
clear_extent_bit(&BTRFS_I(inode)->io_tree, start_pos,
last_pos - 1, EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING, 0, 0, &cached_state,
GFP_NOFS);
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG,
0, 0, &cached_state, GFP_NOFS);
unlock_extent_cached(&BTRFS_I(inode)->io_tree,
start_pos, last_pos - 1, &cached_state,
GFP_NOFS);
@ -1514,16 +1546,24 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
trace_btrfs_sync_file(file, datasync);
/*
* We write the dirty pages in the range and wait until they complete
* out of the ->i_mutex. If so, we can flush the dirty pages by
* multi-task, and make the performance up.
*/
ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (ret)
return ret;
mutex_lock(&inode->i_mutex);
/*
* we wait first, since the writeback may change the inode, also wait
* ordered range does a filemape_write_and_wait_range which is why we
* don't do it above like other file systems.
* We flush the dirty pages again to avoid some dirty pages in the
* range being left.
*/
root->log_batch++;
atomic_inc(&root->log_batch);
btrfs_wait_ordered_range(inode, start, end);
root->log_batch++;
atomic_inc(&root->log_batch);
/*
* check the transaction that last modified this inode
@ -1544,6 +1584,14 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
BTRFS_I(inode)->last_trans <=
root->fs_info->last_trans_committed) {
BTRFS_I(inode)->last_trans = 0;
/*
* We'v had everything committed since the last time we were
* modified so clear this flag in case it was set for whatever
* reason, it's no longer relevant.
*/
clear_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&BTRFS_I(inode)->runtime_flags);
mutex_unlock(&inode->i_mutex);
goto out;
}
@ -1615,6 +1663,324 @@ static int btrfs_file_mmap(struct file *filp, struct vm_area_struct *vma)
return 0;
}
static int hole_mergeable(struct inode *inode, struct extent_buffer *leaf,
int slot, u64 start, u64 end)
{
struct btrfs_file_extent_item *fi;
struct btrfs_key key;
if (slot < 0 || slot >= btrfs_header_nritems(leaf))
return 0;
btrfs_item_key_to_cpu(leaf, &key, slot);
if (key.objectid != btrfs_ino(inode) ||
key.type != BTRFS_EXTENT_DATA_KEY)
return 0;
fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
if (btrfs_file_extent_type(leaf, fi) != BTRFS_FILE_EXTENT_REG)
return 0;
if (btrfs_file_extent_disk_bytenr(leaf, fi))
return 0;
if (key.offset == end)
return 1;
if (key.offset + btrfs_file_extent_num_bytes(leaf, fi) == start)
return 1;
return 0;
}
static int fill_holes(struct btrfs_trans_handle *trans, struct inode *inode,
struct btrfs_path *path, u64 offset, u64 end)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_buffer *leaf;
struct btrfs_file_extent_item *fi;
struct extent_map *hole_em;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
struct btrfs_key key;
int ret;
key.objectid = btrfs_ino(inode);
key.type = BTRFS_EXTENT_DATA_KEY;
key.offset = offset;
ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
if (ret < 0)
return ret;
BUG_ON(!ret);
leaf = path->nodes[0];
if (hole_mergeable(inode, leaf, path->slots[0]-1, offset, end)) {
u64 num_bytes;
path->slots[0]--;
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
num_bytes = btrfs_file_extent_num_bytes(leaf, fi) +
end - offset;
btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
btrfs_set_file_extent_offset(leaf, fi, 0);
btrfs_mark_buffer_dirty(leaf);
goto out;
}
if (hole_mergeable(inode, leaf, path->slots[0]+1, offset, end)) {
u64 num_bytes;
path->slots[0]++;
key.offset = offset;
btrfs_set_item_key_safe(trans, root, path, &key);
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
num_bytes = btrfs_file_extent_num_bytes(leaf, fi) + end -
offset;
btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
btrfs_set_file_extent_offset(leaf, fi, 0);
btrfs_mark_buffer_dirty(leaf);
goto out;
}
btrfs_release_path(path);
ret = btrfs_insert_file_extent(trans, root, btrfs_ino(inode), offset,
0, 0, end - offset, 0, end - offset,
0, 0, 0);
if (ret)
return ret;
out:
btrfs_release_path(path);
hole_em = alloc_extent_map();
if (!hole_em) {
btrfs_drop_extent_cache(inode, offset, end - 1, 0);
set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&BTRFS_I(inode)->runtime_flags);
} else {
hole_em->start = offset;
hole_em->len = end - offset;
hole_em->orig_start = offset;
hole_em->block_start = EXTENT_MAP_HOLE;
hole_em->block_len = 0;
hole_em->bdev = root->fs_info->fs_devices->latest_bdev;
hole_em->compress_type = BTRFS_COMPRESS_NONE;
hole_em->generation = trans->transid;
do {
btrfs_drop_extent_cache(inode, offset, end - 1, 0);
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, hole_em);
if (!ret)
list_move(&hole_em->list,
&em_tree->modified_extents);
write_unlock(&em_tree->lock);
} while (ret == -EEXIST);
free_extent_map(hole_em);
if (ret)
set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&BTRFS_I(inode)->runtime_flags);
}
return 0;
}
static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_state *cached_state = NULL;
struct btrfs_path *path;
struct btrfs_block_rsv *rsv;
struct btrfs_trans_handle *trans;
u64 mask = BTRFS_I(inode)->root->sectorsize - 1;
u64 lockstart = (offset + mask) & ~mask;
u64 lockend = ((offset + len) & ~mask) - 1;
u64 cur_offset = lockstart;
u64 min_size = btrfs_calc_trunc_metadata_size(root, 1);
u64 drop_end;
unsigned long nr;
int ret = 0;
int err = 0;
bool same_page = (offset >> PAGE_CACHE_SHIFT) ==
((offset + len) >> PAGE_CACHE_SHIFT);
btrfs_wait_ordered_range(inode, offset, len);
mutex_lock(&inode->i_mutex);
if (offset >= inode->i_size) {
mutex_unlock(&inode->i_mutex);
return 0;
}
/*
* Only do this if we are in the same page and we aren't doing the
* entire page.
*/
if (same_page && len < PAGE_CACHE_SIZE) {
ret = btrfs_truncate_page(inode, offset, len, 0);
mutex_unlock(&inode->i_mutex);
return ret;
}
/* zero back part of the first page */
ret = btrfs_truncate_page(inode, offset, 0, 0);
if (ret) {
mutex_unlock(&inode->i_mutex);
return ret;
}
/* zero the front end of the last page */
ret = btrfs_truncate_page(inode, offset + len, 0, 1);
if (ret) {
mutex_unlock(&inode->i_mutex);
return ret;
}
if (lockend < lockstart) {
mutex_unlock(&inode->i_mutex);
return 0;
}
while (1) {
struct btrfs_ordered_extent *ordered;
truncate_pagecache_range(inode, lockstart, lockend);
lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend,
0, &cached_state);
ordered = btrfs_lookup_first_ordered_extent(inode, lockend);
/*
* We need to make sure we have no ordered extents in this range
* and nobody raced in and read a page in this range, if we did
* we need to try again.
*/
if ((!ordered ||
(ordered->file_offset + ordered->len < lockstart ||
ordered->file_offset > lockend)) &&
!test_range_bit(&BTRFS_I(inode)->io_tree, lockstart,
lockend, EXTENT_UPTODATE, 0,
cached_state)) {
if (ordered)
btrfs_put_ordered_extent(ordered);
break;
}
if (ordered)
btrfs_put_ordered_extent(ordered);
unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart,
lockend, &cached_state, GFP_NOFS);
btrfs_wait_ordered_range(inode, lockstart,
lockend - lockstart + 1);
}
path = btrfs_alloc_path();
if (!path) {
ret = -ENOMEM;
goto out;
}
rsv = btrfs_alloc_block_rsv(root, BTRFS_BLOCK_RSV_TEMP);
if (!rsv) {
ret = -ENOMEM;
goto out_free;
}
rsv->size = btrfs_calc_trunc_metadata_size(root, 1);
rsv->failfast = 1;
/*
* 1 - update the inode
* 1 - removing the extents in the range
* 1 - adding the hole extent
*/
trans = btrfs_start_transaction(root, 3);
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
goto out_free;
}
ret = btrfs_block_rsv_migrate(&root->fs_info->trans_block_rsv, rsv,
min_size);
BUG_ON(ret);
trans->block_rsv = rsv;
while (cur_offset < lockend) {
ret = __btrfs_drop_extents(trans, root, inode, path,
cur_offset, lockend + 1,
&drop_end, 1);
if (ret != -ENOSPC)
break;
trans->block_rsv = &root->fs_info->trans_block_rsv;
ret = fill_holes(trans, inode, path, cur_offset, drop_end);
if (ret) {
err = ret;
break;
}
cur_offset = drop_end;
ret = btrfs_update_inode(trans, root, inode);
if (ret) {
err = ret;
break;
}
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
btrfs_btree_balance_dirty(root, nr);
trans = btrfs_start_transaction(root, 3);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
trans = NULL;
break;
}
ret = btrfs_block_rsv_migrate(&root->fs_info->trans_block_rsv,
rsv, min_size);
BUG_ON(ret); /* shouldn't happen */
trans->block_rsv = rsv;
}
if (ret) {
err = ret;
goto out_trans;
}
trans->block_rsv = &root->fs_info->trans_block_rsv;
ret = fill_holes(trans, inode, path, cur_offset, drop_end);
if (ret) {
err = ret;
goto out_trans;
}
out_trans:
if (!trans)
goto out_free;
trans->block_rsv = &root->fs_info->trans_block_rsv;
ret = btrfs_update_inode(trans, root, inode);
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
btrfs_btree_balance_dirty(root, nr);
out_free:
btrfs_free_path(path);
btrfs_free_block_rsv(root, rsv);
out:
unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, lockend,
&cached_state, GFP_NOFS);
mutex_unlock(&inode->i_mutex);
if (ret && !err)
err = ret;
return err;
}
static long btrfs_fallocate(struct file *file, int mode,
loff_t offset, loff_t len)
{
@ -1633,15 +1999,18 @@ static long btrfs_fallocate(struct file *file, int mode,
alloc_start = offset & ~mask;
alloc_end = (offset + len + mask) & ~mask;
/* We only support the FALLOC_FL_KEEP_SIZE mode */
if (mode & ~FALLOC_FL_KEEP_SIZE)
/* Make sure we aren't being give some crap mode */
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
return -EOPNOTSUPP;
if (mode & FALLOC_FL_PUNCH_HOLE)
return btrfs_punch_hole(inode, offset, len);
/*
* Make sure we have enough space before we do the
* allocation.
*/
ret = btrfs_check_data_free_space(inode, len);
ret = btrfs_check_data_free_space(inode, alloc_end - alloc_start + 1);
if (ret)
return ret;
@ -1748,7 +2117,7 @@ static long btrfs_fallocate(struct file *file, int mode,
out:
mutex_unlock(&inode->i_mutex);
/* Let go of our reservation. */
btrfs_free_reserved_data_space(inode, len);
btrfs_free_reserved_data_space(inode, alloc_end - alloc_start + 1);
return ret;
}

10
fs/btrfs/free-space-cache.c
View File

@ -966,7 +966,7 @@ int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
block_group->key.offset)) {
ret = find_first_extent_bit(unpin, start,
&extent_start, &extent_end,
EXTENT_DIRTY);
EXTENT_DIRTY, NULL);
if (ret) {
ret = 0;
break;
@ -1454,9 +1454,7 @@ static int search_bitmap(struct btrfs_free_space_ctl *ctl,
max_t(u64, *offset, bitmap_info->offset));
bits = bytes_to_bits(*bytes, ctl->unit);
for (i = find_next_bit(bitmap_info->bitmap, BITS_PER_BITMAP, i);
i < BITS_PER_BITMAP;
i = find_next_bit(bitmap_info->bitmap, BITS_PER_BITMAP, i + 1)) {
for_each_set_bit_from(i, bitmap_info->bitmap, BITS_PER_BITMAP) {
next_zero = find_next_zero_bit(bitmap_info->bitmap,
BITS_PER_BITMAP, i);
if ((next_zero - i) >= bits) {
@ -2307,9 +2305,7 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
again:
found_bits = 0;
for (i = find_next_bit(entry->bitmap, BITS_PER_BITMAP, i);
i < BITS_PER_BITMAP;
i = find_next_bit(entry->bitmap, BITS_PER_BITMAP, i + 1)) {
for_each_set_bit_from(i, entry->bitmap, BITS_PER_BITMAP) {
next_zero = find_next_zero_bit(entry->bitmap,
BITS_PER_BITMAP, i);
if (next_zero - i >= min_bits) {

10
fs/btrfs/hash.h
View File

@ -24,4 +24,14 @@ static inline u64 btrfs_name_hash(const char *name, int len)
{
return crc32c((u32)~1, name, len);
}
/*
* Figure the key offset of an extended inode ref
*/
static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
int len)
{
return (u64) crc32c(parent_objectid, name, len);
}
#endif

277
fs/btrfs/inode-item.c
View File

@ -18,6 +18,7 @@
#include "ctree.h"
#include "disk-io.h"
#include "hash.h"
#include "transaction.h"
#include "print-tree.h"
@ -50,18 +51,57 @@ static int find_name_in_backref(struct btrfs_path *path, const char *name,
return 0;
}
struct btrfs_inode_ref *
int btrfs_find_name_in_ext_backref(struct btrfs_path *path, u64 ref_objectid,
const char *name, int name_len,
struct btrfs_inode_extref **extref_ret)
{
struct extent_buffer *leaf;
struct btrfs_inode_extref *extref;
unsigned long ptr;
unsigned long name_ptr;
u32 item_size;
u32 cur_offset = 0;
int ref_name_len;
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, path->slots[0]);
ptr = btrfs_item_ptr_offset(leaf, path->slots[0]);
/*
* Search all extended backrefs in this item. We're only
* looking through any collisions so most of the time this is
* just going to compare against one buffer. If all is well,
* we'll return success and the inode ref object.
*/
while (cur_offset < item_size) {
extref = (struct btrfs_inode_extref *) (ptr + cur_offset);
name_ptr = (unsigned long)(&extref->name);
ref_name_len = btrfs_inode_extref_name_len(leaf, extref);
if (ref_name_len == name_len &&
btrfs_inode_extref_parent(leaf, extref) == ref_objectid &&
(memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0)) {
if (extref_ret)
*extref_ret = extref;
return 1;
}
cur_offset += ref_name_len + sizeof(*extref);
}
return 0;
}
static struct btrfs_inode_ref *
btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
const char *name, int name_len,
u64 inode_objectid, u64 ref_objectid, int mod)
u64 inode_objectid, u64 ref_objectid, int ins_len,
int cow)
{
int ret;
struct btrfs_key key;
struct btrfs_inode_ref *ref;
int ins_len = mod < 0 ? -1 : 0;
int cow = mod != 0;
int ret;
key.objectid = inode_objectid;
key.type = BTRFS_INODE_REF_KEY;
@ -77,6 +117,143 @@ btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
return ref;
}
/* Returns NULL if no extref found */
struct btrfs_inode_extref *
btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
const char *name, int name_len,
u64 inode_objectid, u64 ref_objectid, int ins_len,
int cow)
{
int ret;
struct btrfs_key key;
struct btrfs_inode_extref *extref;
key.objectid = inode_objectid;
key.type = BTRFS_INODE_EXTREF_KEY;
key.offset = btrfs_extref_hash(ref_objectid, name, name_len);
ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow);
if (ret < 0)
return ERR_PTR(ret);
if (ret > 0)
return NULL;
if (!btrfs_find_name_in_ext_backref(path, ref_objectid, name, name_len, &extref))
return NULL;
return extref;
}
int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
const char *name, int name_len,
u64 inode_objectid, u64 ref_objectid, int mod,
u64 *ret_index)
{
struct btrfs_inode_ref *ref;
struct btrfs_inode_extref *extref;
int ins_len = mod < 0 ? -1 : 0;
int cow = mod != 0;
ref = btrfs_lookup_inode_ref(trans, root, path, name, name_len,
inode_objectid, ref_objectid, ins_len,
cow);
if (IS_ERR(ref))
return PTR_ERR(ref);
if (ref != NULL) {
*ret_index = btrfs_inode_ref_index(path->nodes[0], ref);
return 0;
}
btrfs_release_path(path);
extref = btrfs_lookup_inode_extref(trans, root, path, name,
name_len, inode_objectid,
ref_objectid, ins_len, cow);
if (IS_ERR(extref))
return PTR_ERR(extref);
if (extref) {
*ret_index = btrfs_inode_extref_index(path->nodes[0], extref);
return 0;
}
return -ENOENT;
}
int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
const char *name, int name_len,
u64 inode_objectid, u64 ref_objectid, u64 *index)
{
struct btrfs_path *path;
struct btrfs_key key;
struct btrfs_inode_extref *extref;
struct extent_buffer *leaf;
int ret;
int del_len = name_len + sizeof(*extref);
unsigned long ptr;
unsigned long item_start;
u32 item_size;
key.objectid = inode_objectid;
btrfs_set_key_type(&key, BTRFS_INODE_EXTREF_KEY);
key.offset = btrfs_extref_hash(ref_objectid, name, name_len);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->leave_spinning = 1;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret > 0)
ret = -ENOENT;
if (ret < 0)
goto out;
/*
* Sanity check - did we find the right item for this name?
* This should always succeed so error here will make the FS
* readonly.
*/
if (!btrfs_find_name_in_ext_backref(path, ref_objectid,
name, name_len, &extref)) {
btrfs_std_error(root->fs_info, -ENOENT);
ret = -EROFS;
goto out;
}
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, path->slots[0]);
if (index)
*index = btrfs_inode_extref_index(leaf, extref);
if (del_len == item_size) {
/*
* Common case only one ref in the item, remove the
* whole item.
*/
ret = btrfs_del_item(trans, root, path);
goto out;
}
ptr = (unsigned long)extref;
item_start = btrfs_item_ptr_offset(leaf, path->slots[0]);
memmove_extent_buffer(leaf, ptr, ptr + del_len,
item_size - (ptr + del_len - item_start));
btrfs_truncate_item(trans, root, path, item_size - del_len, 1);
out:
btrfs_free_path(path);
return ret;
}
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
const char *name, int name_len,
@ -91,6 +268,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
u32 item_size;
u32 sub_item_len;
int ret;
int search_ext_refs = 0;
int del_len = name_len + sizeof(*ref);
key.objectid = inode_objectid;
@ -106,12 +284,14 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret > 0) {
ret = -ENOENT;
search_ext_refs = 1;
goto out;
} else if (ret < 0) {
goto out;
}
if (!find_name_in_backref(path, name, name_len, &ref)) {
ret = -ENOENT;
search_ext_refs = 1;
goto out;
}
leaf = path->nodes[0];
@ -129,8 +309,78 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
item_start = btrfs_item_ptr_offset(leaf, path->slots[0]);
memmove_extent_buffer(leaf, ptr, ptr + sub_item_len,
item_size - (ptr + sub_item_len - item_start));
btrfs_truncate_item(trans, root, path,
item_size - sub_item_len, 1);
btrfs_truncate_item(trans, root, path, item_size - sub_item_len, 1);
out:
btrfs_free_path(path);
if (search_ext_refs) {
/*
* No refs were found, or we could not find the
* name in our ref array. Find and remove the extended
* inode ref then.
*/
return btrfs_del_inode_extref(trans, root, name, name_len,
inode_objectid, ref_objectid, index);
}
return ret;
}
/*
* btrfs_insert_inode_extref() - Inserts an extended inode ref into a tree.
*
* The caller must have checked against BTRFS_LINK_MAX already.
*/
static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
const char *name, int name_len,
u64 inode_objectid, u64 ref_objectid, u64 index)
{
struct btrfs_inode_extref *extref;
int ret;
int ins_len = name_len + sizeof(*extref);
unsigned long ptr;
struct btrfs_path *path;
struct btrfs_key key;
struct extent_buffer *leaf;
struct btrfs_item *item;
key.objectid = inode_objectid;
key.type = BTRFS_INODE_EXTREF_KEY;
key.offset = btrfs_extref_hash(ref_objectid, name, name_len);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->leave_spinning = 1;
ret = btrfs_insert_empty_item(trans, root, path, &key,
ins_len);
if (ret == -EEXIST) {
if (btrfs_find_name_in_ext_backref(path, ref_objectid,
name, name_len, NULL))
goto out;
btrfs_extend_item(trans, root, path, ins_len);
ret = 0;
}
if (ret < 0)
goto out;
leaf = path->nodes[0];
item = btrfs_item_nr(leaf, path->slots[0]);
ptr = (unsigned long)btrfs_item_ptr(leaf, path->slots[0], char);
ptr += btrfs_item_size(leaf, item) - ins_len;
extref = (struct btrfs_inode_extref *)ptr;
btrfs_set_inode_extref_name_len(path->nodes[0], extref, name_len);
btrfs_set_inode_extref_index(path->nodes[0], extref, index);
btrfs_set_inode_extref_parent(path->nodes[0], extref, ref_objectid);
ptr = (unsigned long)&extref->name;
write_extent_buffer(path->nodes[0], name, ptr, name_len);
btrfs_mark_buffer_dirty(path->nodes[0]);
out:
btrfs_free_path(path);
return ret;
@ -191,6 +441,19 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
out:
btrfs_free_path(path);
if (ret == -EMLINK) {
struct btrfs_super_block *disk_super = root->fs_info->super_copy;
/* We ran out of space in the ref array. Need to
* add an extended ref. */
if (btrfs_super_incompat_flags(disk_super)
& BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
ret = btrfs_insert_inode_extref(trans, root, name,
name_len,
inode_objectid,
ref_objectid, index);
}
return ret;
}

372
fs/btrfs/inode.c
View File

@ -230,7 +230,6 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans,
u64 inline_len = actual_end - start;
u64 aligned_end = (end + root->sectorsize - 1) &
~((u64)root->sectorsize - 1);
u64 hint_byte;
u64 data_len = inline_len;
int ret;
@ -247,8 +246,7 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans,
return 1;
}
ret = btrfs_drop_extents(trans, inode, start, aligned_end,
&hint_byte, 1);
ret = btrfs_drop_extents(trans, root, inode, start, aligned_end, 1);
if (ret)
return ret;
@ -664,7 +662,7 @@ static noinline int submit_compressed_extents(struct inode *inode,
async_extent->compressed_size,
async_extent->compressed_size,
0, alloc_hint, &ins, 1);
if (ret)
if (ret && ret != -ENOSPC)
btrfs_abort_transaction(trans, root, ret);
btrfs_end_transaction(trans, root);
}
@ -1308,6 +1306,7 @@ static noinline int run_delalloc_nocow(struct inode *inode,
em->block_start = disk_bytenr;
em->bdev = root->fs_info->fs_devices->latest_bdev;
set_bit(EXTENT_FLAG_PINNED, &em->flags);
set_bit(EXTENT_FLAG_PREALLOC, &em->flags);
while (1) {
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
@ -1364,11 +1363,7 @@ static noinline int run_delalloc_nocow(struct inode *inode,
}
error:
if (nolock) {
err = btrfs_end_transaction_nolock(trans, root);
} else {
err = btrfs_end_transaction(trans, root);
}
if (!ret)
ret = err;
@ -1785,7 +1780,6 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_key ins;
u64 hint;
int ret;
path = btrfs_alloc_path();
@ -1803,8 +1797,8 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
* the caller is expected to unpin it and allow it to be merged
* with the others.
*/
ret = btrfs_drop_extents(trans, inode, file_pos, file_pos + num_bytes,
&hint, 0);
ret = btrfs_drop_extents(trans, root, inode, file_pos,
file_pos + num_bytes, 0);
if (ret)
goto out;
@ -1828,10 +1822,8 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
btrfs_set_file_extent_encryption(leaf, fi, encryption);
btrfs_set_file_extent_other_encoding(leaf, fi, other_encoding);
btrfs_unlock_up_safe(path, 1);
btrfs_set_lock_blocking(leaf);
btrfs_mark_buffer_dirty(leaf);
btrfs_release_path(path);
inode_add_bytes(inode, num_bytes);
@ -1929,11 +1921,10 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
ordered_extent->len,
compress_type, 0, 0,
BTRFS_FILE_EXTENT_REG);
unpin_extent_cache(&BTRFS_I(inode)->extent_tree,
ordered_extent->file_offset,
ordered_extent->len);
}
unpin_extent_cache(&BTRFS_I(inode)->extent_tree,
ordered_extent->file_offset, ordered_extent->len,
trans->transid);
if (ret < 0) {
btrfs_abort_transaction(trans, root, ret);
goto out_unlock;
@ -1949,6 +1940,8 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
btrfs_abort_transaction(trans, root, ret);
goto out_unlock;
}
} else {
btrfs_set_inode_last_trans(trans, inode);
}
ret = 0;
out_unlock:
@ -1958,12 +1951,8 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
out:
if (root != root->fs_info->tree_root)
btrfs_delalloc_release_metadata(inode, ordered_extent->len);
if (trans) {
if (nolock)
btrfs_end_transaction_nolock(trans, root);
else
if (trans)
btrfs_end_transaction(trans, root);
}
if (ret)
clear_extent_uptodate(io_tree, ordered_extent->file_offset,
@ -2119,7 +2108,6 @@ void btrfs_run_delayed_iputs(struct btrfs_root *root)
if (empty)
return;
down_read(&root->fs_info->cleanup_work_sem);
spin_lock(&fs_info->delayed_iput_lock);
list_splice_init(&fs_info->delayed_iputs, &list);
spin_unlock(&fs_info->delayed_iput_lock);
@ -2130,7 +2118,6 @@ void btrfs_run_delayed_iputs(struct btrfs_root *root)
iput(delayed->inode);
kfree(delayed);
}
up_read(&root->fs_info->cleanup_work_sem);
}
enum btrfs_orphan_cleanup_state {
@ -2198,7 +2185,7 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode)
int ret;
if (!root->orphan_block_rsv) {
block_rsv = btrfs_alloc_block_rsv(root);
block_rsv = btrfs_alloc_block_rsv(root, BTRFS_BLOCK_RSV_TEMP);
if (!block_rsv)
return -ENOMEM;
}
@ -2225,7 +2212,7 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode)
insert = 1;
#endif
insert = 1;
atomic_dec(&root->orphan_inodes);
atomic_inc(&root->orphan_inodes);
}
if (!test_and_set_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
@ -2590,6 +2577,18 @@ static void btrfs_read_locked_inode(struct inode *inode)
inode_set_bytes(inode, btrfs_inode_nbytes(leaf, inode_item));
BTRFS_I(inode)->generation = btrfs_inode_generation(leaf, inode_item);
BTRFS_I(inode)->last_trans = btrfs_inode_transid(leaf, inode_item);
/*
* If we were modified in the current generation and evicted from memory
* and then re-read we need to do a full sync since we don't have any
* idea about which extents were modified before we were evicted from
* cache.
*/
if (BTRFS_I(inode)->last_trans == root->fs_info->generation)
set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&BTRFS_I(inode)->runtime_flags);
inode->i_version = btrfs_inode_sequence(leaf, inode_item);
inode->i_generation = BTRFS_I(inode)->generation;
inode->i_rdev = 0;
@ -2894,7 +2893,6 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct btrfs_path *path;
struct btrfs_inode_ref *ref;
struct btrfs_dir_item *di;
struct inode *inode = dentry->d_inode;
u64 index;
@ -3008,17 +3006,17 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
}
btrfs_release_path(path);
ref = btrfs_lookup_inode_ref(trans, root, path,
dentry->d_name.name, dentry->d_name.len,
ino, dir_ino, 0);
if (IS_ERR(ref)) {
err = PTR_ERR(ref);
ret = btrfs_get_inode_ref_index(trans, root, path, dentry->d_name.name,
dentry->d_name.len, ino, dir_ino, 0,
&index);
if (ret) {
err = ret;
goto out;
}
BUG_ON(!ref); /* Logic error */
if (check_path_shared(root, path))
goto out;
index = btrfs_inode_ref_index(path->nodes[0], ref);
btrfs_release_path(path);
/*
@ -3061,7 +3059,7 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
static void __unlink_end_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
if (trans->block_rsv == &root->fs_info->global_block_rsv) {
if (trans->block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL) {
btrfs_block_rsv_release(root, trans->block_rsv,
trans->bytes_reserved);
trans->block_rsv = &root->fs_info->trans_block_rsv;
@ -3191,9 +3189,10 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
struct btrfs_trans_handle *trans;
unsigned long nr = 0;
if (inode->i_size > BTRFS_EMPTY_DIR_SIZE ||
btrfs_ino(inode) == BTRFS_FIRST_FREE_OBJECTID)
if (inode->i_size > BTRFS_EMPTY_DIR_SIZE)
return -ENOTEMPTY;
if (btrfs_ino(inode) == BTRFS_FIRST_FREE_OBJECTID)
return -EPERM;
trans = __unlink_start_trans(dir, dentry);
if (IS_ERR(trans))
@ -3267,8 +3266,13 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
return -ENOMEM;
path->reada = -1;
/*
* We want to drop from the next block forward in case this new size is
* not block aligned since we will be keeping the last block of the
* extent just the way it is.
*/
if (root->ref_cows || root == root->fs_info->tree_root)
btrfs_drop_extent_cache(inode, new_size & (~mask), (u64)-1, 0);
btrfs_drop_extent_cache(inode, (new_size + mask) & (~mask), (u64)-1, 0);
/*
* This function is also used to drop the items in the log tree before
@ -3429,12 +3433,6 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
if (path->slots[0] == 0 ||
path->slots[0] != pending_del_slot) {
if (root->ref_cows &&
BTRFS_I(inode)->location.objectid !=
BTRFS_FREE_INO_OBJECTID) {
err = -EAGAIN;
goto out;
}
if (pending_del_nr) {
ret = btrfs_del_items(trans, root, path,
pending_del_slot,
@ -3465,12 +3463,20 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
}
/*
* taken from block_truncate_page, but does cow as it zeros out
* any bytes left in the last page in the file.
* btrfs_truncate_page - read, zero a chunk and write a page
* @inode - inode that we're zeroing
* @from - the offset to start zeroing
* @len - the length to zero, 0 to zero the entire range respective to the
* offset
* @front - zero up to the offset instead of from the offset on
*
* This will find the page for the "from" offset and cow the page and zero the
* part we want to zero. This is used with truncate and hole punching.
*/
static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
int front)
{
struct inode *inode = mapping->host;
struct address_space *mapping = inode->i_mapping;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
struct btrfs_ordered_extent *ordered;
@ -3485,7 +3491,8 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
u64 page_start;
u64 page_end;
if ((offset & (blocksize - 1)) == 0)
if ((offset & (blocksize - 1)) == 0 &&
(!len || ((len & (blocksize - 1)) == 0)))
goto out;
ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE);
if (ret)
@ -3532,7 +3539,8 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
}
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, page_end,
EXTENT_DIRTY | EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING,
EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG,
0, 0, &cached_state, GFP_NOFS);
ret = btrfs_set_extent_delalloc(inode, page_start, page_end,
@ -3545,8 +3553,13 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
ret = 0;
if (offset != PAGE_CACHE_SIZE) {
if (!len)
len = PAGE_CACHE_SIZE - offset;
kaddr = kmap(page);
memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
if (front)
memset(kaddr, 0, offset);
else
memset(kaddr + offset, 0, len);
flush_dcache_page(page);
kunmap(page);
}
@ -3577,6 +3590,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
struct extent_map *em = NULL;
struct extent_state *cached_state = NULL;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
u64 mask = root->sectorsize - 1;
u64 hole_start = (oldsize + mask) & ~mask;
u64 block_end = (size + mask) & ~mask;
@ -3613,7 +3627,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
last_byte = min(extent_map_end(em), block_end);
last_byte = (last_byte + mask) & ~mask;
if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
u64 hint_byte = 0;
struct extent_map *hole_em;
hole_size = last_byte - cur_offset;
trans = btrfs_start_transaction(root, 3);
@ -3622,9 +3636,9 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
break;
}
err = btrfs_drop_extents(trans, inode, cur_offset,
cur_offset + hole_size,
&hint_byte, 1);
err = btrfs_drop_extents(trans, root, inode,
cur_offset,
cur_offset + hole_size, 1);
if (err) {
btrfs_abort_transaction(trans, root, err);
btrfs_end_transaction(trans, root);
@ -3641,9 +3655,39 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
break;
}
btrfs_drop_extent_cache(inode, hole_start,
last_byte - 1, 0);
btrfs_drop_extent_cache(inode, cur_offset,
cur_offset + hole_size - 1, 0);
hole_em = alloc_extent_map();
if (!hole_em) {
set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&BTRFS_I(inode)->runtime_flags);
goto next;
}
hole_em->start = cur_offset;
hole_em->len = hole_size;
hole_em->orig_start = cur_offset;
hole_em->block_start = EXTENT_MAP_HOLE;
hole_em->block_len = 0;
hole_em->bdev = root->fs_info->fs_devices->latest_bdev;
hole_em->compress_type = BTRFS_COMPRESS_NONE;
hole_em->generation = trans->transid;
while (1) {
write_lock(&em_tree->lock);
err = add_extent_mapping(em_tree, hole_em);
if (!err)
list_move(&hole_em->list,
&em_tree->modified_extents);
write_unlock(&em_tree->lock);
if (err != -EEXIST)
break;
btrfs_drop_extent_cache(inode, cur_offset,
cur_offset +
hole_size - 1, 0);
}
free_extent_map(hole_em);
next:
btrfs_update_inode(trans, root, inode);
btrfs_end_transaction(trans, root);
}
@ -3768,26 +3812,22 @@ void btrfs_evict_inode(struct inode *inode)
goto no_delete;
}
rsv = btrfs_alloc_block_rsv(root);
rsv = btrfs_alloc_block_rsv(root, BTRFS_BLOCK_RSV_TEMP);
if (!rsv) {
btrfs_orphan_del(NULL, inode);
goto no_delete;
}
rsv->size = min_size;
rsv->failfast = 1;
global_rsv = &root->fs_info->global_block_rsv;
btrfs_i_size_write(inode, 0);
/*
* This is a bit simpler than btrfs_truncate since
*
* 1) We've already reserved our space for our orphan item in the
* unlink.
* 2) We're going to delete the inode item, so we don't need to update
* it at all.
*
* So we just need to reserve some slack space in case we add bytes when
* doing the truncate.
* This is a bit simpler than btrfs_truncate since we've already
* reserved our space for our orphan item in the unlink, so we just
* need to reserve some slack space in case we add bytes and update
* inode item when doing the truncate.
*/
while (1) {
ret = btrfs_block_rsv_refill_noflush(root, rsv, min_size);
@ -3808,7 +3848,7 @@ void btrfs_evict_inode(struct inode *inode)
goto no_delete;
}
trans = btrfs_start_transaction(root, 0);
trans = btrfs_start_transaction_noflush(root, 1);
if (IS_ERR(trans)) {
btrfs_orphan_del(NULL, inode);
btrfs_free_block_rsv(root, rsv);
@ -3818,9 +3858,13 @@ void btrfs_evict_inode(struct inode *inode)
trans->block_rsv = rsv;
ret = btrfs_truncate_inode_items(trans, root, inode, 0, 0);
if (ret != -EAGAIN)
if (ret != -ENOSPC)
break;
trans->block_rsv = &root->fs_info->trans_block_rsv;
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
trans = NULL;
@ -4470,9 +4514,6 @@ int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc)
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
if (nolock)
ret = btrfs_end_transaction_nolock(trans, root);
else
ret = btrfs_commit_transaction(trans, root);
}
return ret;
@ -4671,6 +4712,14 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
BTRFS_I(inode)->generation = trans->transid;
inode->i_generation = BTRFS_I(inode)->generation;
/*
* We could have gotten an inode number from somebody who was fsynced
* and then removed in this same transaction, so let's just set full
* sync since it will be a full sync anyway and this will blow away the
* old info in the log.
*/
set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &BTRFS_I(inode)->runtime_flags);
if (S_ISDIR(mode))
owner = 0;
else
@ -4680,6 +4729,12 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
btrfs_set_key_type(&key[0], BTRFS_INODE_ITEM_KEY);
key[0].offset = 0;
/*
* Start new inodes with an inode_ref. This is slightly more
* efficient for small numbers of hard links since they will
* be packed into one item. Extended refs will kick in if we
* add more hard links than can fit in the ref item.
*/
key[1].objectid = objectid;
btrfs_set_key_type(&key[1], BTRFS_INODE_REF_KEY);
key[1].offset = ref_objectid;
@ -4986,7 +5041,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
if (root->objectid != BTRFS_I(inode)->root->objectid)
return -EXDEV;
if (inode->i_nlink == ~0U)
if (inode->i_nlink >= BTRFS_LINK_MAX)
return -EMLINK;
err = btrfs_set_inode_index(dir, &index);
@ -5450,6 +5505,7 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
write_unlock(&em_tree->lock);
out:
if (em)
trace_btrfs_get_extent(root, em);
if (path)
@ -5836,6 +5892,48 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend,
return ret;
}
static struct extent_map *create_pinned_em(struct inode *inode, u64 start,
u64 len, u64 orig_start,
u64 block_start, u64 block_len,
int type)
{
struct extent_map_tree *em_tree;
struct extent_map *em;
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret;
em_tree = &BTRFS_I(inode)->extent_tree;
em = alloc_extent_map();
if (!em)
return ERR_PTR(-ENOMEM);
em->start = start;
em->orig_start = orig_start;
em->len = len;
em->block_len = block_len;
em->block_start = block_start;
em->bdev = root->fs_info->fs_devices->latest_bdev;
set_bit(EXTENT_FLAG_PINNED, &em->flags);
if (type == BTRFS_ORDERED_PREALLOC)
set_bit(EXTENT_FLAG_PREALLOC, &em->flags);
do {
btrfs_drop_extent_cache(inode, em->start,
em->start + em->len - 1, 0);
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
write_unlock(&em_tree->lock);
} while (ret == -EEXIST);
if (ret) {
free_extent_map(em);
return ERR_PTR(ret);
}
return em;
}
static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
{
@ -5950,6 +6048,19 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
goto must_cow;
if (can_nocow_odirect(trans, inode, start, len) == 1) {
u64 orig_start = em->start;
if (type == BTRFS_ORDERED_PREALLOC) {
free_extent_map(em);
em = create_pinned_em(inode, start, len,
orig_start,
block_start, len, type);
if (IS_ERR(em)) {
btrfs_end_transaction(trans, root);
goto unlock_err;
}
}
ret = btrfs_add_ordered_extent_dio(inode, start,
block_start, len, len, type);
btrfs_end_transaction(trans, root);
@ -5999,7 +6110,8 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
if (lockstart < lockend) {
if (create && len < lockend - lockstart) {
clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart,
lockstart + len - 1, unlock_bits, 1, 0,
lockstart + len - 1,
unlock_bits | EXTENT_DEFRAG, 1, 0,
&cached_state, GFP_NOFS);
/*
* Beside unlock, we also need to cleanup reserved space
@ -6007,8 +6119,8 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
*/
clear_extent_bit(&BTRFS_I(inode)->io_tree,
lockstart + len, lockend,
unlock_bits | EXTENT_DO_ACCOUNTING,
1, 0, NULL, GFP_NOFS);
unlock_bits | EXTENT_DO_ACCOUNTING |
EXTENT_DEFRAG, 1, 0, NULL, GFP_NOFS);
} else {
clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart,
lockend, unlock_bits, 1, 0,
@ -6573,8 +6685,8 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset)
*/
clear_extent_bit(tree, page_start, page_end,
EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_LOCKED | EXTENT_DO_ACCOUNTING, 1, 0,
&cached_state, GFP_NOFS);
EXTENT_LOCKED | EXTENT_DO_ACCOUNTING |
EXTENT_DEFRAG, 1, 0, &cached_state, GFP_NOFS);
/*
* whoever cleared the private bit is responsible
* for the finish_ordered_io
@ -6590,7 +6702,8 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset)
}
clear_extent_bit(tree, page_start, page_end,
EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING, 1, 1, &cached_state, GFP_NOFS);
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 1, 1,
&cached_state, GFP_NOFS);
__btrfs_releasepage(page, GFP_NOFS);
ClearPageChecked(page);
@ -6687,7 +6800,8 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
* prepare_pages in the normal write path.
*/
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, page_end,
EXTENT_DIRTY | EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING,
EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG,
0, 0, &cached_state, GFP_NOFS);
ret = btrfs_set_extent_delalloc(inode, page_start, page_end,
@ -6718,6 +6832,7 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
BTRFS_I(inode)->last_trans = root->fs_info->generation;
BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit;
unlock_extent_cached(io_tree, page_start, page_end, &cached_state, GFP_NOFS);
@ -6745,7 +6860,7 @@ static int btrfs_truncate(struct inode *inode)
u64 mask = root->sectorsize - 1;
u64 min_size = btrfs_calc_trunc_metadata_size(root, 1);
ret = btrfs_truncate_page(inode->i_mapping, inode->i_size);
ret = btrfs_truncate_page(inode, inode->i_size, 0, 0);
if (ret)
return ret;
@ -6788,10 +6903,11 @@ static int btrfs_truncate(struct inode *inode)
* 3) fs_info->trans_block_rsv - this will have 1 items worth left for
* updating the inode.
*/
rsv = btrfs_alloc_block_rsv(root);
rsv = btrfs_alloc_block_rsv(root, BTRFS_BLOCK_RSV_TEMP);
if (!rsv)
return -ENOMEM;
rsv->size = min_size;
rsv->failfast = 1;
/*
* 1 for the truncate slack space
@ -6837,36 +6953,21 @@ static int btrfs_truncate(struct inode *inode)
&BTRFS_I(inode)->runtime_flags))
btrfs_add_ordered_operation(trans, root, inode);
while (1) {
ret = btrfs_block_rsv_refill(root, rsv, min_size);
if (ret) {
/*
* This can only happen with the original transaction we
* started above, every other time we shouldn't have a
* transaction started yet.
* So if we truncate and then write and fsync we normally would just
* write the extents that changed, which is a problem if we need to
* first truncate that entire inode. So set this flag so we write out
* all of the extents in the inode to the sync log so we're completely
* safe.
*/
if (ret == -EAGAIN)
goto end_trans;
err = ret;
break;
}
if (!trans) {
/* Just need the 1 for updating the inode */
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
ret = err = PTR_ERR(trans);
trans = NULL;
break;
}
}
set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &BTRFS_I(inode)->runtime_flags);
trans->block_rsv = rsv;
while (1) {
ret = btrfs_truncate_inode_items(trans, root, inode,
inode->i_size,
BTRFS_EXTENT_DATA_KEY);
if (ret != -EAGAIN) {
if (ret != -ENOSPC) {
err = ret;
break;
}
@ -6877,11 +6978,22 @@ static int btrfs_truncate(struct inode *inode)
err = ret;
break;
}
end_trans:
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
trans = NULL;
btrfs_btree_balance_dirty(root, nr);
trans = btrfs_start_transaction(root, 2);
if (IS_ERR(trans)) {
ret = err = PTR_ERR(trans);
trans = NULL;
break;
}
ret = btrfs_block_rsv_migrate(&root->fs_info->trans_block_rsv,
rsv, min_size);
BUG_ON(ret); /* shouldn't happen */
trans->block_rsv = rsv;
}
if (ret == 0 && inode->i_nlink > 0) {
@ -6965,6 +7077,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
ei->csum_bytes = 0;
ei->index_cnt = (u64)-1;
ei->last_unlink_trans = 0;
ei->last_log_commit = 0;
spin_lock_init(&ei->lock);
ei->outstanding_extents = 0;
@ -7095,31 +7208,31 @@ void btrfs_destroy_cachep(void)
int btrfs_init_cachep(void)
{
btrfs_inode_cachep = kmem_cache_create("btrfs_inode_cache",
btrfs_inode_cachep = kmem_cache_create("btrfs_inode",
sizeof(struct btrfs_inode), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, init_once);
if (!btrfs_inode_cachep)
goto fail;
btrfs_trans_handle_cachep = kmem_cache_create("btrfs_trans_handle_cache",
btrfs_trans_handle_cachep = kmem_cache_create("btrfs_trans_handle",
sizeof(struct btrfs_trans_handle), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL);
if (!btrfs_trans_handle_cachep)
goto fail;
btrfs_transaction_cachep = kmem_cache_create("btrfs_transaction_cache",
btrfs_transaction_cachep = kmem_cache_create("btrfs_transaction",
sizeof(struct btrfs_transaction), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL);
if (!btrfs_transaction_cachep)
goto fail;
btrfs_path_cachep = kmem_cache_create("btrfs_path_cache",
btrfs_path_cachep = kmem_cache_create("btrfs_path",
sizeof(struct btrfs_path), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL);
if (!btrfs_path_cachep)
goto fail;
btrfs_free_space_cachep = kmem_cache_create("btrfs_free_space_cache",
btrfs_free_space_cachep = kmem_cache_create("btrfs_free_space",
sizeof(struct btrfs_free_space), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL);
if (!btrfs_free_space_cachep)
@ -7513,6 +7626,8 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
loff_t actual_len, u64 *alloc_hint,
struct btrfs_trans_handle *trans)
{
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
struct extent_map *em;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_key ins;
u64 cur_offset = start;
@ -7553,6 +7668,37 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
btrfs_drop_extent_cache(inode, cur_offset,
cur_offset + ins.offset -1, 0);
em = alloc_extent_map();
if (!em) {
set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&BTRFS_I(inode)->runtime_flags);
goto next;
}
em->start = cur_offset;
em->orig_start = cur_offset;
em->len = ins.offset;
em->block_start = ins.objectid;
em->block_len = ins.offset;
em->bdev = root->fs_info->fs_devices->latest_bdev;
set_bit(EXTENT_FLAG_PREALLOC, &em->flags);
em->generation = trans->transid;
while (1) {
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
if (!ret)
list_move(&em->list,
&em_tree->modified_extents);
write_unlock(&em_tree->lock);
if (ret != -EEXIST)
break;
btrfs_drop_extent_cache(inode, cur_offset,
cur_offset + ins.offset - 1,
0);
}
free_extent_map(em);
next:
num_bytes -= ins.offset;
cur_offset += ins.offset;
*alloc_hint = ins.objectid + ins.offset;

88
fs/btrfs/ioctl.c
View File

@ -181,6 +181,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
int ret;
u64 ip_oldflags;
unsigned int i_oldflags;
umode_t mode;
if (btrfs_root_readonly(root))
return -EROFS;
@ -203,6 +204,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
ip_oldflags = ip->flags;
i_oldflags = inode->i_flags;
mode = inode->i_mode;
flags = btrfs_mask_flags(inode->i_mode, flags);
oldflags = btrfs_flags_to_ioctl(ip->flags);
@ -237,10 +239,31 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
ip->flags |= BTRFS_INODE_DIRSYNC;
else
ip->flags &= ~BTRFS_INODE_DIRSYNC;
if (flags & FS_NOCOW_FL)
if (flags & FS_NOCOW_FL) {
if (S_ISREG(mode)) {
/*
* It's safe to turn csums off here, no extents exist.
* Otherwise we want the flag to reflect the real COW
* status of the file and will not set it.
*/
if (inode->i_size == 0)
ip->flags |= BTRFS_INODE_NODATACOW
| BTRFS_INODE_NODATASUM;
} else {
ip->flags |= BTRFS_INODE_NODATACOW;
else
}
} else {
/*
* Revert back under same assuptions as above
*/
if (S_ISREG(mode)) {
if (inode->i_size == 0)
ip->flags &= ~(BTRFS_INODE_NODATACOW
| BTRFS_INODE_NODATASUM);
} else {
ip->flags &= ~BTRFS_INODE_NODATACOW;
}
}
/*
* The COMPRESS flag can only be changed by users, while the NOCOMPRESS
@ -516,7 +539,8 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
if (!pending_snapshot)
return -ENOMEM;
btrfs_init_block_rsv(&pending_snapshot->block_rsv);
btrfs_init_block_rsv(&pending_snapshot->block_rsv,
BTRFS_BLOCK_RSV_TEMP);
pending_snapshot->dentry = dentry;
pending_snapshot->root = root;
pending_snapshot->readonly = readonly;
@ -525,7 +549,7 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
*inherit = NULL; /* take responsibility to free it */
}
trans = btrfs_start_transaction(root->fs_info->extent_root, 5);
trans = btrfs_start_transaction(root->fs_info->extent_root, 6);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto fail;
@ -1022,8 +1046,8 @@ static int cluster_pages_for_defrag(struct inode *inode,
page_start, page_end - 1, 0, &cached_state);
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start,
page_end - 1, EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING, 0, 0, &cached_state,
GFP_NOFS);
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0,
&cached_state, GFP_NOFS);
if (i_done != page_cnt) {
spin_lock(&BTRFS_I(inode)->lock);
@ -1034,8 +1058,8 @@ static int cluster_pages_for_defrag(struct inode *inode,
}
btrfs_set_extent_delalloc(inode, page_start, page_end - 1,
&cached_state);
set_extent_defrag(&BTRFS_I(inode)->io_tree, page_start, page_end - 1,
&cached_state, GFP_NOFS);
unlock_extent_cached(&BTRFS_I(inode)->io_tree,
page_start, page_end - 1, &cached_state,
@ -2351,7 +2375,6 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
int ret;
u64 len = olen;
u64 bs = root->fs_info->sb->s_blocksize;
u64 hint_byte;
/*
* TODO:
@ -2456,13 +2479,13 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
another, and lock file content */
while (1) {
struct btrfs_ordered_extent *ordered;
lock_extent(&BTRFS_I(src)->io_tree, off, off+len);
ordered = btrfs_lookup_first_ordered_extent(src, off+len);
lock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1);
ordered = btrfs_lookup_first_ordered_extent(src, off + len - 1);
if (!ordered &&
!test_range_bit(&BTRFS_I(src)->io_tree, off, off+len,
!test_range_bit(&BTRFS_I(src)->io_tree, off, off + len - 1,
EXTENT_DELALLOC, 0, NULL))
break;
unlock_extent(&BTRFS_I(src)->io_tree, off, off+len);
unlock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1);
if (ordered)
btrfs_put_ordered_extent(ordered);
btrfs_wait_ordered_range(src, off, len);
@ -2536,7 +2559,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
btrfs_release_path(path);
if (key.offset + datal <= off ||
key.offset >= off+len)
key.offset >= off + len - 1)
goto next;
memcpy(&new_key, &key, sizeof(new_key));
@ -2574,10 +2597,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
datal -= off - key.offset;
}
ret = btrfs_drop_extents(trans, inode,
ret = btrfs_drop_extents(trans, root, inode,
new_key.offset,
new_key.offset + datal,
&hint_byte, 1);
1);
if (ret) {
btrfs_abort_transaction(trans, root,
ret);
@ -2648,10 +2671,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
size -= skip + trim;
datal -= skip + trim;
ret = btrfs_drop_extents(trans, inode,
ret = btrfs_drop_extents(trans, root, inode,
new_key.offset,
new_key.offset + datal,
&hint_byte, 1);
1);
if (ret) {
btrfs_abort_transaction(trans, root,
ret);
@ -2715,7 +2738,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
ret = 0;
out:
btrfs_release_path(path);
unlock_extent(&BTRFS_I(src)->io_tree, off, off+len);
unlock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1);
out_unlock:
mutex_unlock(&src->i_mutex);
mutex_unlock(&inode->i_mutex);
@ -2850,7 +2873,7 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
return 0;
}
static void get_block_group_info(struct list_head *groups_list,
void btrfs_get_block_group_info(struct list_head *groups_list,
struct btrfs_ioctl_space_info *space)
{
struct btrfs_block_group_cache *block_group;
@ -2959,8 +2982,8 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
down_read(&info->groups_sem);
for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) {
if (!list_empty(&info->block_groups[c])) {
get_block_group_info(&info->block_groups[c],
&space);
btrfs_get_block_group_info(
&info->block_groups[c], &space);
memcpy(dest, &space, sizeof(space));
dest++;
space_args.total_spaces++;
@ -3208,11 +3231,9 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
{
int ret = 0;
int size;
u64 extent_item_pos;
struct btrfs_ioctl_logical_ino_args *loi;
struct btrfs_data_container *inodes = NULL;
struct btrfs_path *path = NULL;
struct btrfs_key key;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@ -3230,7 +3251,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
goto out;
}
size = min_t(u32, loi->size, 4096);
size = min_t(u32, loi->size, 64 * 1024);
inodes = init_data_container(size);
if (IS_ERR(inodes)) {
ret = PTR_ERR(inodes);
@ -3238,22 +3259,13 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
goto out;
}
ret = extent_from_logical(root->fs_info, loi->logical, path, &key);
btrfs_release_path(path);
if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK)
ret = iterate_inodes_from_logical(loi->logical, root->fs_info, path,
build_ino_list, inodes);
if (ret == -EINVAL)
ret = -ENOENT;
if (ret < 0)
goto out;
extent_item_pos = loi->logical - key.objectid;
ret = iterate_extent_inodes(root->fs_info, key.objectid,
extent_item_pos, 0, build_ino_list,
inodes);
if (ret < 0)
goto out;
ret = copy_to_user((void *)(unsigned long)loi->inodes,
(void *)(unsigned long)inodes, size);
if (ret)
@ -3261,7 +3273,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
out:
btrfs_free_path(path);
kfree(inodes);
vfree(inodes);
kfree(loi);
return ret;

97
fs/btrfs/ordered-data.c
View File

@ -25,6 +25,8 @@
#include "btrfs_inode.h"
#include "extent_io.h"
static struct kmem_cache *btrfs_ordered_extent_cache;
static u64 entry_end(struct btrfs_ordered_extent *entry)
{
if (entry->file_offset + entry->len < entry->file_offset)
@ -187,7 +189,7 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
struct btrfs_ordered_extent *entry;
tree = &BTRFS_I(inode)->ordered_tree;
entry = kzalloc(sizeof(*entry), GFP_NOFS);
entry = kmem_cache_zalloc(btrfs_ordered_extent_cache, GFP_NOFS);
if (!entry)
return -ENOMEM;
@ -421,7 +423,7 @@ void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
list_del(&sum->list);
kfree(sum);
}
kfree(entry);
kmem_cache_free(btrfs_ordered_extent_cache, entry);
}
}
@ -466,8 +468,7 @@ void btrfs_remove_ordered_extent(struct inode *inode,
* wait for all the ordered extents in a root. This is done when balancing
* space between drives.
*/
void btrfs_wait_ordered_extents(struct btrfs_root *root,
int nocow_only, int delay_iput)
void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput)
{
struct list_head splice;
struct list_head *cur;
@ -482,15 +483,6 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root,
cur = splice.next;
ordered = list_entry(cur, struct btrfs_ordered_extent,
root_extent_list);
if (nocow_only &&
!test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags) &&
!test_bit(BTRFS_ORDERED_PREALLOC, &ordered->flags)) {
list_move(&ordered->root_extent_list,
&root->fs_info->ordered_extents);
cond_resched_lock(&root->fs_info->ordered_extent_lock);
continue;
}
list_del_init(&ordered->root_extent_list);
atomic_inc(&ordered->refs);
@ -775,7 +767,6 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
struct btrfs_ordered_inode_tree *tree = &BTRFS_I(inode)->ordered_tree;
u64 disk_i_size;
u64 new_i_size;
u64 i_size_test;
u64 i_size = i_size_read(inode);
struct rb_node *node;
struct rb_node *prev = NULL;
@ -835,55 +826,30 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
break;
if (test->file_offset >= i_size)
break;
if (test->file_offset >= disk_i_size)
if (test->file_offset >= disk_i_size) {
/*
* we don't update disk_i_size now, so record this
* undealt i_size. Or we will not know the real
* i_size.
*/
if (test->outstanding_isize < offset)
test->outstanding_isize = offset;
if (ordered &&
ordered->outstanding_isize >
test->outstanding_isize)
test->outstanding_isize =
ordered->outstanding_isize;
goto out;
}
}
new_i_size = min_t(u64, offset, i_size);
/*
* at this point, we know we can safely update i_size to at least
* the offset from this ordered extent. But, we need to
* walk forward and see if ios from higher up in the file have
* finished.
* Some ordered extents may completed before the current one, and
* we hold the real i_size in ->outstanding_isize.
*/
if (ordered) {
node = rb_next(&ordered->rb_node);
} else {
if (prev)
node = rb_next(prev);
else
node = rb_first(&tree->tree);
}
/*
* We are looking for an area between our current extent and the next
* ordered extent to update the i_size to. There are 3 cases here
*
* 1) We don't actually have anything and we can update to i_size.
* 2) We have stuff but they already did their i_size update so again we
* can just update to i_size.
* 3) We have an outstanding ordered extent so the most we can update
* our disk_i_size to is the start of the next offset.
*/
i_size_test = i_size;
for (; node; node = rb_next(node)) {
test = rb_entry(node, struct btrfs_ordered_extent, rb_node);
if (test_bit(BTRFS_ORDERED_UPDATED_ISIZE, &test->flags))
continue;
if (test->file_offset > offset) {
i_size_test = test->file_offset;
break;
}
}
/*
* i_size_test is the end of a region after this ordered
* extent where there are no ordered extents, we can safely set
* disk_i_size to this.
*/
if (i_size_test > offset)
new_i_size = min_t(u64, i_size_test, i_size);
if (ordered && ordered->outstanding_isize > new_i_size)
new_i_size = min_t(u64, ordered->outstanding_isize, i_size);
BTRFS_I(inode)->disk_i_size = new_i_size;
ret = 0;
out:
@ -984,3 +950,20 @@ void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
}
spin_unlock(&root->fs_info->ordered_extent_lock);
}
int __init ordered_data_init(void)
{
btrfs_ordered_extent_cache = kmem_cache_create("btrfs_ordered_extent",
sizeof(struct btrfs_ordered_extent), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
NULL);
if (!btrfs_ordered_extent_cache)
return -ENOMEM;
return 0;
}
void ordered_data_exit(void)
{
if (btrfs_ordered_extent_cache)
kmem_cache_destroy(btrfs_ordered_extent_cache);
}

12
fs/btrfs/ordered-data.h
View File

@ -96,6 +96,13 @@ struct btrfs_ordered_extent {
/* number of bytes that still need writing */
u64 bytes_left;
/*
* the end of the ordered extent which is behind it but
* didn't update disk_i_size. Please see the comment of
* btrfs_ordered_update_i_size();
*/
u64 outstanding_isize;
/* flags (described above) */
unsigned long flags;
@ -183,6 +190,7 @@ void btrfs_run_ordered_operations(struct btrfs_root *root, int wait);
void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode);
void btrfs_wait_ordered_extents(struct btrfs_root *root,
int nocow_only, int delay_iput);
void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput);
int __init ordered_data_init(void);
void ordered_data_exit(void);
#endif

40
fs/btrfs/qgroup.c
View File

@ -1145,12 +1145,12 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
ulist_reinit(tmp);
/* XXX id not needed */
ulist_add(tmp, qg->qgroupid, (unsigned long)qg, GFP_ATOMIC);
ulist_add(tmp, qg->qgroupid, (u64)(uintptr_t)qg, GFP_ATOMIC);
ULIST_ITER_INIT(&tmp_uiter);
while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) {
struct btrfs_qgroup_list *glist;
qg = (struct btrfs_qgroup *)tmp_unode->aux;
qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux;
if (qg->refcnt < seq)
qg->refcnt = seq + 1;
else
@ -1158,7 +1158,7 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
list_for_each_entry(glist, &qg->groups, next_group) {
ulist_add(tmp, glist->group->qgroupid,
(unsigned long)glist->group,
(u64)(uintptr_t)glist->group,
GFP_ATOMIC);
}
}
@ -1168,13 +1168,13 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
* step 2: walk from the new root
*/
ulist_reinit(tmp);
ulist_add(tmp, qgroup->qgroupid, (unsigned long)qgroup, GFP_ATOMIC);
ulist_add(tmp, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC);
ULIST_ITER_INIT(&uiter);
while ((unode = ulist_next(tmp, &uiter))) {
struct btrfs_qgroup *qg;
struct btrfs_qgroup_list *glist;
qg = (struct btrfs_qgroup *)unode->aux;
qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux;
if (qg->refcnt < seq) {
/* not visited by step 1 */
qg->rfer += sgn * node->num_bytes;
@ -1190,7 +1190,7 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
list_for_each_entry(glist, &qg->groups, next_group) {
ulist_add(tmp, glist->group->qgroupid,
(unsigned long)glist->group, GFP_ATOMIC);
(uintptr_t)glist->group, GFP_ATOMIC);
}
}
@ -1208,12 +1208,12 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
continue;
ulist_reinit(tmp);
ulist_add(tmp, qg->qgroupid, (unsigned long)qg, GFP_ATOMIC);
ulist_add(tmp, qg->qgroupid, (uintptr_t)qg, GFP_ATOMIC);
ULIST_ITER_INIT(&tmp_uiter);
while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) {
struct btrfs_qgroup_list *glist;
qg = (struct btrfs_qgroup *)tmp_unode->aux;
qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux;
if (qg->tag == seq)
continue;
@ -1225,7 +1225,7 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
list_for_each_entry(glist, &qg->groups, next_group) {
ulist_add(tmp, glist->group->qgroupid,
(unsigned long)glist->group,
(uintptr_t)glist->group,
GFP_ATOMIC);
}
}
@ -1469,13 +1469,17 @@ int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes)
* be exceeded
*/
ulist = ulist_alloc(GFP_ATOMIC);
ulist_add(ulist, qgroup->qgroupid, (unsigned long)qgroup, GFP_ATOMIC);
if (!ulist) {
ret = -ENOMEM;
goto out;
}
ulist_add(ulist, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC);
ULIST_ITER_INIT(&uiter);
while ((unode = ulist_next(ulist, &uiter))) {
struct btrfs_qgroup *qg;
struct btrfs_qgroup_list *glist;
qg = (struct btrfs_qgroup *)unode->aux;
qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux;
if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) &&
qg->reserved + qg->rfer + num_bytes >
@ -1489,7 +1493,7 @@ int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes)
list_for_each_entry(glist, &qg->groups, next_group) {
ulist_add(ulist, glist->group->qgroupid,
(unsigned long)glist->group, GFP_ATOMIC);
(uintptr_t)glist->group, GFP_ATOMIC);
}
}
if (ret)
@ -1502,7 +1506,7 @@ int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes)
while ((unode = ulist_next(ulist, &uiter))) {
struct btrfs_qgroup *qg;
qg = (struct btrfs_qgroup *)unode->aux;
qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux;
qg->reserved += num_bytes;
}
@ -1541,19 +1545,23 @@ void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes)
goto out;
ulist = ulist_alloc(GFP_ATOMIC);
ulist_add(ulist, qgroup->qgroupid, (unsigned long)qgroup, GFP_ATOMIC);
if (!ulist) {
btrfs_std_error(fs_info, -ENOMEM);
goto out;
}
ulist_add(ulist, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC);
ULIST_ITER_INIT(&uiter);
while ((unode = ulist_next(ulist, &uiter))) {
struct btrfs_qgroup *qg;
struct btrfs_qgroup_list *glist;
qg = (struct btrfs_qgroup *)unode->aux;
qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux;
qg->reserved -= num_bytes;
list_for_each_entry(glist, &qg->groups, next_group) {
ulist_add(ulist, glist->group->qgroupid,
(unsigned long)glist->group, GFP_ATOMIC);
(uintptr_t)glist->group, GFP_ATOMIC);
}
}

11
fs/btrfs/relocation.c
View File

@ -3270,8 +3270,8 @@ static int delete_block_group_cache(struct btrfs_fs_info *fs_info,
key.offset = 0;
inode = btrfs_iget(fs_info->sb, &key, root, NULL);
if (IS_ERR_OR_NULL(inode) || is_bad_inode(inode)) {
if (inode && !IS_ERR(inode))
if (IS_ERR(inode) || is_bad_inode(inode)) {
if (!IS_ERR(inode))
iput(inode);
return -ENOENT;
}
@ -3621,7 +3621,7 @@ int find_next_extent(struct btrfs_trans_handle *trans,
ret = find_first_extent_bit(&rc->processed_blocks,
key.objectid, &start, &end,
EXTENT_DIRTY);
EXTENT_DIRTY, NULL);
if (ret == 0 && start <= key.objectid) {
btrfs_release_path(path);
@ -3674,7 +3674,8 @@ int prepare_to_relocate(struct reloc_control *rc)
struct btrfs_trans_handle *trans;
int ret;
rc->block_rsv = btrfs_alloc_block_rsv(rc->extent_root);
rc->block_rsv = btrfs_alloc_block_rsv(rc->extent_root,
BTRFS_BLOCK_RSV_TEMP);
if (!rc->block_rsv)
return -ENOMEM;
@ -4057,7 +4058,7 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
(unsigned long long)rc->block_group->flags);
btrfs_start_delalloc_inodes(fs_info->tree_root, 0);
btrfs_wait_ordered_extents(fs_info->tree_root, 0, 0);
btrfs_wait_ordered_extents(fs_info->tree_root, 0);
while (1) {
mutex_lock(&fs_info->cleaner_mutex);

29
fs/btrfs/root-tree.c
View File

@ -141,8 +141,10 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
return -ENOMEM;
ret = btrfs_search_slot(trans, root, key, path, 0, 1);
if (ret < 0)
goto out_abort;
if (ret < 0) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
if (ret != 0) {
btrfs_print_leaf(root, path->nodes[0]);
@ -166,16 +168,23 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_release_path(path);
ret = btrfs_search_slot(trans, root, key, path,
-1, 1);
if (ret < 0)
goto out_abort;
if (ret < 0) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
ret = btrfs_del_item(trans, root, path);
if (ret < 0)
goto out_abort;
if (ret < 0) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
btrfs_release_path(path);
ret = btrfs_insert_empty_item(trans, root, path,
key, sizeof(*item));
if (ret < 0)
goto out_abort;
if (ret < 0) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
l = path->nodes[0];
slot = path->slots[0];
ptr = btrfs_item_ptr_offset(l, slot);
@ -192,10 +201,6 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
out:
btrfs_free_path(path);
return ret;
out_abort:
btrfs_abort_transaction(trans, root, ret);
goto out;
}
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,

32
fs/btrfs/scrub.c
View File

@ -352,13 +352,14 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
struct extent_buffer *eb;
struct btrfs_extent_item *ei;
struct scrub_warning swarn;
u32 item_size;
int ret;
u64 ref_root;
u8 ref_level;
unsigned long ptr = 0;
const int bufsize = 4096;
u64 extent_item_pos;
u64 flags = 0;
u64 ref_root;
u32 item_size;
u8 ref_level;
const int bufsize = 4096;
int ret;
path = btrfs_alloc_path();
@ -375,7 +376,8 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
if (!path || !swarn.scratch_buf || !swarn.msg_buf)
goto out;
ret = extent_from_logical(fs_info, swarn.logical, path, &found_key);
ret = extent_from_logical(fs_info, swarn.logical, path, &found_key,
&flags);
if (ret < 0)
goto out;
@ -387,7 +389,7 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
item_size = btrfs_item_size_nr(eb, path->slots[0]);
btrfs_release_path(path);
if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
do {
ret = tree_backref_for_extent(&ptr, eb, ei, item_size,
&ref_root, &ref_level);
@ -1029,6 +1031,7 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev,
spin_lock(&sdev->stat_lock);
sdev->stat.malloc_errors++;
spin_unlock(&sdev->stat_lock);
kfree(bbio);
return -ENOMEM;
}
sblock->page_count++;
@ -1666,21 +1669,6 @@ static void scrub_bio_end_io_worker(struct btrfs_work *work)
scrub_block_put(sblock);
}
if (sbio->err) {
/* what is this good for??? */
sbio->bio->bi_flags &= ~(BIO_POOL_MASK - 1);
sbio->bio->bi_flags |= 1 << BIO_UPTODATE;
sbio->bio->bi_phys_segments = 0;
sbio->bio->bi_idx = 0;
for (i = 0; i < sbio->page_count; i++) {
struct bio_vec *bi;
bi = &sbio->bio->bi_io_vec[i];
bi->bv_offset = 0;
bi->bv_len = PAGE_SIZE;
}
}
bio_put(sbio->bio);
sbio->bio = NULL;
spin_lock(&sdev->list_lock);

905
fs/btrfs/send.c
View File

File diff suppressed because it is too large Load Diff

1
fs/btrfs/send.h
View File

@ -130,4 +130,5 @@ enum {
#ifdef __KERNEL__
long btrfs_ioctl_send(struct file *mnt_file, void __user *arg);
int write_buf(struct file *filp, const void *buf, u32 len, loff_t *off);
#endif

68
fs/btrfs/super.c
View File

@ -243,12 +243,18 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *function,
unsigned int line, int errno)
{
WARN_ONCE(1, KERN_DEBUG "btrfs: Transaction aborted");
WARN_ONCE(1, KERN_DEBUG "btrfs: Transaction aborted\n");
trans->aborted = errno;
/* Nothing used. The other threads that have joined this
* transaction may be able to continue. */
if (!trans->blocks_used) {
btrfs_printk(root->fs_info, "Aborting unused transaction.\n");
char nbuf[16];
const char *errstr;
errstr = btrfs_decode_error(root->fs_info, errno, nbuf);
btrfs_printk(root->fs_info,
"%s:%d: Aborting unused transaction(%s).\n",
function, line, errstr);
return;
}
trans->transaction->aborted = errno;
@ -407,7 +413,15 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
btrfs_set_opt(info->mount_opt, NODATASUM);
break;
case Opt_nodatacow:
if (!btrfs_test_opt(root, COMPRESS) ||
!btrfs_test_opt(root, FORCE_COMPRESS)) {
printk(KERN_INFO "btrfs: setting nodatacow, compression disabled\n");
} else {
printk(KERN_INFO "btrfs: setting nodatacow\n");
}
info->compress_type = BTRFS_COMPRESS_NONE;
btrfs_clear_opt(info->mount_opt, COMPRESS);
btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS);
btrfs_set_opt(info->mount_opt, NODATACOW);
btrfs_set_opt(info->mount_opt, NODATASUM);
break;
@ -422,10 +436,14 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
compress_type = "zlib";
info->compress_type = BTRFS_COMPRESS_ZLIB;
btrfs_set_opt(info->mount_opt, COMPRESS);
btrfs_clear_opt(info->mount_opt, NODATACOW);
btrfs_clear_opt(info->mount_opt, NODATASUM);
} else if (strcmp(args[0].from, "lzo") == 0) {
compress_type = "lzo";
info->compress_type = BTRFS_COMPRESS_LZO;
btrfs_set_opt(info->mount_opt, COMPRESS);
btrfs_clear_opt(info->mount_opt, NODATACOW);
btrfs_clear_opt(info->mount_opt, NODATASUM);
btrfs_set_fs_incompat(info, COMPRESS_LZO);
} else if (strncmp(args[0].from, "no", 2) == 0) {
compress_type = "no";
@ -543,11 +561,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG);
break;
case Opt_defrag:
printk(KERN_INFO "btrfs: enabling auto defrag");
printk(KERN_INFO "btrfs: enabling auto defrag\n");
btrfs_set_opt(info->mount_opt, AUTO_DEFRAG);
break;
case Opt_recovery:
printk(KERN_INFO "btrfs: enabling auto recovery");
printk(KERN_INFO "btrfs: enabling auto recovery\n");
btrfs_set_opt(info->mount_opt, RECOVERY);
break;
case Opt_skip_balance:
@ -846,18 +864,15 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
return 0;
}
btrfs_wait_ordered_extents(root, 0, 0);
btrfs_wait_ordered_extents(root, 0);
spin_lock(&fs_info->trans_lock);
if (!fs_info->running_transaction) {
spin_unlock(&fs_info->trans_lock);
trans = btrfs_attach_transaction(root);
if (IS_ERR(trans)) {
/* no transaction, don't bother */
if (PTR_ERR(trans) == -ENOENT)
return 0;
}
spin_unlock(&fs_info->trans_lock);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
}
return btrfs_commit_transaction(trans, root);
}
@ -1508,17 +1523,21 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
static int btrfs_freeze(struct super_block *sb)
{
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
mutex_lock(&fs_info->transaction_kthread_mutex);
mutex_lock(&fs_info->cleaner_mutex);
struct btrfs_trans_handle *trans;
struct btrfs_root *root = btrfs_sb(sb)->tree_root;
trans = btrfs_attach_transaction(root);
if (IS_ERR(trans)) {
/* no transaction, don't bother */
if (PTR_ERR(trans) == -ENOENT)
return 0;
return PTR_ERR(trans);
}
return btrfs_commit_transaction(trans, root);
}
static int btrfs_unfreeze(struct super_block *sb)
{
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
mutex_unlock(&fs_info->cleaner_mutex);
mutex_unlock(&fs_info->transaction_kthread_mutex);
return 0;
}
@ -1595,7 +1614,7 @@ static int btrfs_interface_init(void)
static void btrfs_interface_exit(void)
{
if (misc_deregister(&btrfs_misc) < 0)
printk(KERN_INFO "misc_deregister failed for control device");
printk(KERN_INFO "btrfs: misc_deregister failed for control device\n");
}
static int __init init_btrfs_fs(void)
@ -1620,10 +1639,14 @@ static int __init init_btrfs_fs(void)
if (err)
goto free_extent_io;
err = btrfs_delayed_inode_init();
err = ordered_data_init();
if (err)
goto free_extent_map;
err = btrfs_delayed_inode_init();
if (err)
goto free_ordered_data;
err = btrfs_interface_init();
if (err)
goto free_delayed_inode;
@ -1641,6 +1664,8 @@ static int __init init_btrfs_fs(void)
btrfs_interface_exit();
free_delayed_inode:
btrfs_delayed_inode_exit();
free_ordered_data:
ordered_data_exit();
free_extent_map:
extent_map_exit();
free_extent_io:
@ -1657,6 +1682,7 @@ static void __exit exit_btrfs_fs(void)
{
btrfs_destroy_cachep();
btrfs_delayed_inode_exit();
ordered_data_exit();
extent_map_exit();
extent_io_exit();
btrfs_interface_exit();

279
fs/btrfs/transaction.c
View File

@ -53,7 +53,7 @@ static noinline void switch_commit_root(struct btrfs_root *root)
/*
* either allocate a new transaction or hop into the existing one
*/
static noinline int join_transaction(struct btrfs_root *root, int nofail)
static noinline int join_transaction(struct btrfs_root *root, int type)
{
struct btrfs_transaction *cur_trans;
struct btrfs_fs_info *fs_info = root->fs_info;
@ -67,7 +67,13 @@ static noinline int join_transaction(struct btrfs_root *root, int nofail)
}
if (fs_info->trans_no_join) {
if (!nofail) {
/*
* If we are JOIN_NOLOCK we're already committing a current
* transaction, we just need a handle to deal with something
* when committing the transaction, such as inode cache and
* space cache. It is a special case.
*/
if (type != TRANS_JOIN_NOLOCK) {
spin_unlock(&fs_info->trans_lock);
return -EBUSY;
}
@ -87,6 +93,13 @@ static noinline int join_transaction(struct btrfs_root *root, int nofail)
}
spin_unlock(&fs_info->trans_lock);
/*
* If we are ATTACH, we just want to catch the current transaction,
* and commit it. If there is no transaction, just return ENOENT.
*/
if (type == TRANS_ATTACH)
return -ENOENT;
cur_trans = kmem_cache_alloc(btrfs_transaction_cachep, GFP_NOFS);
if (!cur_trans)
return -ENOMEM;
@ -267,13 +280,6 @@ static void wait_current_trans(struct btrfs_root *root)
}
}
enum btrfs_trans_type {
TRANS_START,
TRANS_JOIN,
TRANS_USERSPACE,
TRANS_JOIN_NOLOCK,
};
static int may_wait_transaction(struct btrfs_root *root, int type)
{
if (root->fs_info->log_root_recovering)
@ -290,7 +296,8 @@ static int may_wait_transaction(struct btrfs_root *root, int type)
}
static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
u64 num_items, int type)
u64 num_items, int type,
int noflush)
{
struct btrfs_trans_handle *h;
struct btrfs_transaction *cur_trans;
@ -324,6 +331,11 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
}
num_bytes = btrfs_calc_trans_metadata_size(root, num_items);
if (noflush)
ret = btrfs_block_rsv_add_noflush(root,
&root->fs_info->trans_block_rsv,
num_bytes);
else
ret = btrfs_block_rsv_add(root,
&root->fs_info->trans_block_rsv,
num_bytes);
@ -335,18 +347,33 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
if (!h)
return ERR_PTR(-ENOMEM);
/*
* If we are JOIN_NOLOCK we're already committing a transaction and
* waiting on this guy, so we don't need to do the sb_start_intwrite
* because we're already holding a ref. We need this because we could
* have raced in and did an fsync() on a file which can kick a commit
* and then we deadlock with somebody doing a freeze.
*
* If we are ATTACH, it means we just want to catch the current
* transaction and commit it, so we needn't do sb_start_intwrite().
*/
if (type < TRANS_JOIN_NOLOCK)
sb_start_intwrite(root->fs_info->sb);
if (may_wait_transaction(root, type))
wait_current_trans(root);
do {
ret = join_transaction(root, type == TRANS_JOIN_NOLOCK);
ret = join_transaction(root, type);
if (ret == -EBUSY)
wait_current_trans(root);
} while (ret == -EBUSY);
if (ret < 0) {
/* We must get the transaction if we are JOIN_NOLOCK. */
BUG_ON(type == TRANS_JOIN_NOLOCK);
if (type < TRANS_JOIN_NOLOCK)
sb_end_intwrite(root->fs_info->sb);
kmem_cache_free(btrfs_trans_handle_cachep, h);
return ERR_PTR(ret);
@ -367,7 +394,9 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
h->aborted = 0;
h->qgroup_reserved = qgroup_reserved;
h->delayed_ref_elem.seq = 0;
h->type = type;
INIT_LIST_HEAD(&h->qgroup_ref_list);
INIT_LIST_HEAD(&h->new_bgs);
smp_mb();
if (cur_trans->blocked && may_wait_transaction(root, type)) {
@ -393,21 +422,33 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
int num_items)
{
return start_transaction(root, num_items, TRANS_START);
return start_transaction(root, num_items, TRANS_START, 0);
}
struct btrfs_trans_handle *btrfs_start_transaction_noflush(
struct btrfs_root *root, int num_items)
{
return start_transaction(root, num_items, TRANS_START, 1);
}
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root)
{
return start_transaction(root, 0, TRANS_JOIN);
return start_transaction(root, 0, TRANS_JOIN, 0);
}
struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root)
{
return start_transaction(root, 0, TRANS_JOIN_NOLOCK);
return start_transaction(root, 0, TRANS_JOIN_NOLOCK, 0);
}
struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root)
{
return start_transaction(root, 0, TRANS_USERSPACE);
return start_transaction(root, 0, TRANS_USERSPACE, 0);
}
struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root)
{
return start_transaction(root, 0, TRANS_ATTACH, 0);
}
/* wait for a transaction commit to be fully complete */
@ -506,11 +547,12 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
}
static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, int throttle, int lock)
struct btrfs_root *root, int throttle)
{
struct btrfs_transaction *cur_trans = trans->transaction;
struct btrfs_fs_info *info = root->fs_info;
int count = 0;
int lock = (trans->type != TRANS_JOIN_NOLOCK);
int err = 0;
if (--trans->use_count) {
@ -536,6 +578,9 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
trans->qgroup_reserved = 0;
}
if (!list_empty(&trans->new_bgs))
btrfs_create_pending_block_groups(trans, root);
while (count < 2) {
unsigned long cur = trans->delayed_ref_updates;
trans->delayed_ref_updates = 0;
@ -551,7 +596,8 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
btrfs_trans_release_metadata(trans, root);
trans->block_rsv = NULL;
sb_end_intwrite(root->fs_info->sb);
if (!list_empty(&trans->new_bgs))
btrfs_create_pending_block_groups(trans, root);
if (lock && !atomic_read(&root->fs_info->open_ioctl_trans) &&
should_end_transaction(trans, root)) {
@ -573,6 +619,9 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
}
}
if (trans->type < TRANS_JOIN_NOLOCK)
sb_end_intwrite(root->fs_info->sb);
WARN_ON(cur_trans != info->running_transaction);
WARN_ON(atomic_read(&cur_trans->num_writers) < 1);
atomic_dec(&cur_trans->num_writers);
@ -604,7 +653,7 @@ int btrfs_end_transaction(struct btrfs_trans_handle *trans,
{
int ret;
ret = __btrfs_end_transaction(trans, root, 0, 1);
ret = __btrfs_end_transaction(trans, root, 0);
if (ret)
return ret;
return 0;
@ -615,18 +664,7 @@ int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
{
int ret;
ret = __btrfs_end_transaction(trans, root, 1, 1);
if (ret)
return ret;
return 0;
}
int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
int ret;
ret = __btrfs_end_transaction(trans, root, 0, 0);
ret = __btrfs_end_transaction(trans, root, 1);
if (ret)
return ret;
return 0;
@ -635,7 +673,7 @@ int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
return __btrfs_end_transaction(trans, root, 1, 1);
return __btrfs_end_transaction(trans, root, 1);
}
/*
@ -649,13 +687,15 @@ int btrfs_write_marked_extents(struct btrfs_root *root,
int err = 0;
int werr = 0;
struct address_space *mapping = root->fs_info->btree_inode->i_mapping;
struct extent_state *cached_state = NULL;
u64 start = 0;
u64 end;
while (!find_first_extent_bit(dirty_pages, start, &start, &end,
mark)) {
convert_extent_bit(dirty_pages, start, end, EXTENT_NEED_WAIT, mark,
GFP_NOFS);
mark, &cached_state)) {
convert_extent_bit(dirty_pages, start, end, EXTENT_NEED_WAIT,
mark, &cached_state, GFP_NOFS);
cached_state = NULL;
err = filemap_fdatawrite_range(mapping, start, end);
if (err)
werr = err;
@ -679,12 +719,14 @@ int btrfs_wait_marked_extents(struct btrfs_root *root,
int err = 0;
int werr = 0;
struct address_space *mapping = root->fs_info->btree_inode->i_mapping;
struct extent_state *cached_state = NULL;
u64 start = 0;
u64 end;
while (!find_first_extent_bit(dirty_pages, start, &start, &end,
EXTENT_NEED_WAIT)) {
clear_extent_bits(dirty_pages, start, end, EXTENT_NEED_WAIT, GFP_NOFS);
EXTENT_NEED_WAIT, &cached_state)) {
clear_extent_bit(dirty_pages, start, end, EXTENT_NEED_WAIT,
0, 0, &cached_state, GFP_NOFS);
err = filemap_fdatawait_range(mapping, start, end);
if (err)
werr = err;
@ -955,6 +997,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
struct btrfs_root *parent_root;
struct btrfs_block_rsv *rsv;
struct inode *parent_inode;
struct btrfs_path *path;
struct btrfs_dir_item *dir_item;
struct dentry *parent;
struct dentry *dentry;
struct extent_buffer *tmp;
@ -967,18 +1011,22 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
u64 root_flags;
uuid_le new_uuid;
rsv = trans->block_rsv;
path = btrfs_alloc_path();
if (!path) {
ret = pending->error = -ENOMEM;
goto path_alloc_fail;
}
new_root_item = kmalloc(sizeof(*new_root_item), GFP_NOFS);
if (!new_root_item) {
ret = pending->error = -ENOMEM;
goto fail;
goto root_item_alloc_fail;
}
ret = btrfs_find_free_objectid(tree_root, &objectid);
if (ret) {
pending->error = ret;
goto fail;
goto no_free_objectid;
}
btrfs_reloc_pre_snapshot(trans, pending, &to_reserve);
@ -988,22 +1036,22 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
to_reserve);
if (ret) {
pending->error = ret;
goto fail;
goto no_free_objectid;
}
}
ret = btrfs_qgroup_inherit(trans, fs_info, root->root_key.objectid,
objectid, pending->inherit);
kfree(pending->inherit);
if (ret) {
pending->error = ret;
goto fail;
goto no_free_objectid;
}
key.objectid = objectid;
key.offset = (u64)-1;
key.type = BTRFS_ROOT_ITEM_KEY;
rsv = trans->block_rsv;
trans->block_rsv = &pending->block_rsv;
dentry = pending->dentry;
@ -1017,24 +1065,21 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
*/
ret = btrfs_set_inode_index(parent_inode, &index);
BUG_ON(ret); /* -ENOMEM */
ret = btrfs_insert_dir_item(trans, parent_root,
dentry->d_name.name, dentry->d_name.len,
parent_inode, &key,
BTRFS_FT_DIR, index);
if (ret == -EEXIST) {
pending->error = -EEXIST;
dput(parent);
goto fail;
} else if (ret) {
goto abort_trans_dput;
}
btrfs_i_size_write(parent_inode, parent_inode->i_size +
dentry->d_name.len * 2);
parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;
ret = btrfs_update_inode(trans, parent_root, parent_inode);
if (ret)
goto abort_trans_dput;
/* check if there is a file/dir which has the same name. */
dir_item = btrfs_lookup_dir_item(NULL, parent_root, path,
btrfs_ino(parent_inode),
dentry->d_name.name,
dentry->d_name.len, 0);
if (dir_item != NULL && !IS_ERR(dir_item)) {
pending->error = -EEXIST;
goto fail;
} else if (IS_ERR(dir_item)) {
ret = PTR_ERR(dir_item);
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
btrfs_release_path(path);
/*
* pull in the delayed directory update
@ -1044,7 +1089,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
*/
ret = btrfs_run_delayed_items(trans, root);
if (ret) { /* Transaction aborted */
dput(parent);
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
@ -1079,7 +1124,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
if (ret) {
btrfs_tree_unlock(old);
free_extent_buffer(old);
goto abort_trans_dput;
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
btrfs_set_lock_blocking(old);
@ -1088,8 +1134,10 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
/* clean up in any case */
btrfs_tree_unlock(old);
free_extent_buffer(old);
if (ret)
goto abort_trans_dput;
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
/* see comments in should_cow_block() */
root->force_cow = 1;
@ -1101,8 +1149,10 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
ret = btrfs_insert_root(trans, tree_root, &key, new_root_item);
btrfs_tree_unlock(tmp);
free_extent_buffer(tmp);
if (ret)
goto abort_trans_dput;
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
/*
* insert root back/forward references
@ -1111,34 +1161,60 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
parent_root->root_key.objectid,
btrfs_ino(parent_inode), index,
dentry->d_name.name, dentry->d_name.len);
dput(parent);
if (ret)
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
key.offset = (u64)-1;
pending->snap = btrfs_read_fs_root_no_name(root->fs_info, &key);
if (IS_ERR(pending->snap)) {
ret = PTR_ERR(pending->snap);
goto abort_trans;
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
ret = btrfs_reloc_post_snapshot(trans, pending);
if (ret)
goto abort_trans;
ret = 0;
fail:
kfree(new_root_item);
trans->block_rsv = rsv;
btrfs_block_rsv_release(root, &pending->block_rsv, (u64)-1);
return ret;
abort_trans_dput:
dput(parent);
abort_trans:
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
ret = btrfs_insert_dir_item(trans, parent_root,
dentry->d_name.name, dentry->d_name.len,
parent_inode, &key,
BTRFS_FT_DIR, index);
/* We have check then name at the beginning, so it is impossible. */
BUG_ON(ret == -EEXIST);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
btrfs_i_size_write(parent_inode, parent_inode->i_size +
dentry->d_name.len * 2);
parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;
ret = btrfs_update_inode(trans, parent_root, parent_inode);
if (ret)
btrfs_abort_transaction(trans, root, ret);
fail:
dput(parent);
trans->block_rsv = rsv;
no_free_objectid:
kfree(new_root_item);
root_item_alloc_fail:
btrfs_free_path(path);
path_alloc_fail:
btrfs_block_rsv_release(root, &pending->block_rsv, (u64)-1);
return ret;
}
/*
* create all the snapshots we've scheduled for creation
*/
@ -1229,6 +1305,16 @@ static void do_async_commit(struct work_struct *work)
struct btrfs_async_commit *ac =
container_of(work, struct btrfs_async_commit, work.work);
/*
* We've got freeze protection passed with the transaction.
* Tell lockdep about it.
*/
rwsem_acquire_read(
&ac->root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1],
0, 1, _THIS_IP_);
current->journal_info = ac->newtrans;
btrfs_commit_transaction(ac->newtrans, ac->root);
kfree(ac);
}
@ -1258,6 +1344,14 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
atomic_inc(&cur_trans->use_count);
btrfs_end_transaction(trans, root);
/*
* Tell lockdep we've released the freeze rwsem, since the
* async commit thread will be the one to unlock it.
*/
rwsem_release(&root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1],
1, _THIS_IP_);
schedule_delayed_work(&ac->work, 0);
/* wait for transaction to start and unblock */
@ -1348,6 +1442,9 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
*/
cur_trans->delayed_refs.flushing = 1;
if (!list_empty(&trans->new_bgs))
btrfs_create_pending_block_groups(trans, root);
ret = btrfs_run_delayed_refs(trans, root, 0);
if (ret)
goto cleanup_transaction;
@ -1403,7 +1500,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
if (flush_on_commit || snap_pending) {
btrfs_start_delalloc_inodes(root, 1);
btrfs_wait_ordered_extents(root, 0, 1);
btrfs_wait_ordered_extents(root, 1);
}
ret = btrfs_run_delayed_items(trans, root);
@ -1456,13 +1553,28 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
*/
mutex_lock(&root->fs_info->reloc_mutex);
ret = btrfs_run_delayed_items(trans, root);
/*
* We needn't worry about the delayed items because we will
* deal with them in create_pending_snapshot(), which is the
* core function of the snapshot creation.
*/
ret = create_pending_snapshots(trans, root->fs_info);
if (ret) {
mutex_unlock(&root->fs_info->reloc_mutex);
goto cleanup_transaction;
}
ret = create_pending_snapshots(trans, root->fs_info);
/*
* We insert the dir indexes of the snapshots and update the inode
* of the snapshots' parents after the snapshot creation, so there
* are some delayed items which are not dealt with. Now deal with
* them.
*
* We needn't worry that this operation will corrupt the snapshots,
* because all the tree which are snapshoted will be forced to COW
* the nodes and leaves.
*/
ret = btrfs_run_delayed_items(trans, root);
if (ret) {
mutex_unlock(&root->fs_info->reloc_mutex);
goto cleanup_transaction;
@ -1584,6 +1696,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
put_transaction(cur_trans);
put_transaction(cur_trans);
if (trans->type < TRANS_JOIN_NOLOCK)
sb_end_intwrite(root->fs_info->sb);
trace_btrfs_transaction_commit(root);

20
fs/btrfs/transaction.h
View File

@ -47,6 +47,14 @@ struct btrfs_transaction {
int aborted;
};
enum btrfs_trans_type {
TRANS_START,
TRANS_JOIN,
TRANS_USERSPACE,
TRANS_JOIN_NOLOCK,
TRANS_ATTACH,
};
struct btrfs_trans_handle {
u64 transid;
u64 bytes_reserved;
@ -58,8 +66,9 @@ struct btrfs_trans_handle {
struct btrfs_transaction *transaction;
struct btrfs_block_rsv *block_rsv;
struct btrfs_block_rsv *orig_rsv;
int aborted;
int adding_csums;
short aborted;
short adding_csums;
enum btrfs_trans_type type;
/*
* this root is only needed to validate that the root passed to
* start_transaction is the same as the one passed to end_transaction.
@ -68,6 +77,7 @@ struct btrfs_trans_handle {
struct btrfs_root *root;
struct seq_list delayed_ref_elem;
struct list_head qgroup_ref_list;
struct list_head new_bgs;
};
struct btrfs_pending_snapshot {
@ -88,16 +98,18 @@ static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
{
BTRFS_I(inode)->last_trans = trans->transaction->transid;
BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit;
}
int btrfs_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
int num_items);
struct btrfs_trans_handle *btrfs_start_transaction_noflush(
struct btrfs_root *root, int num_items);
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root);
int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,

875
fs/btrfs/tree-log.c
View File

File diff suppressed because it is too large Load Diff

7
fs/btrfs/ulist.c
View File

@ -143,14 +143,13 @@ EXPORT_SYMBOL(ulist_free);
* In case of allocation failure -ENOMEM is returned and the ulist stays
* unaltered.
*/
int ulist_add(struct ulist *ulist, u64 val, unsigned long aux,
gfp_t gfp_mask)
int ulist_add(struct ulist *ulist, u64 val, u64 aux, gfp_t gfp_mask)
{
return ulist_add_merge(ulist, val, aux, NULL, gfp_mask);
}
int ulist_add_merge(struct ulist *ulist, u64 val, unsigned long aux,
unsigned long *old_aux, gfp_t gfp_mask)
int ulist_add_merge(struct ulist *ulist, u64 val, u64 aux,
u64 *old_aux, gfp_t gfp_mask)
{
int i;

9
fs/btrfs/ulist.h
View File

@ -33,7 +33,7 @@ struct ulist_iterator {
*/
struct ulist_node {
u64 val; /* value to store */
unsigned long aux; /* auxiliary value saved along with the val */
u64 aux; /* auxiliary value saved along with the val */
};
struct ulist {
@ -65,10 +65,9 @@ void ulist_fini(struct ulist *ulist);
void ulist_reinit(struct ulist *ulist);
struct ulist *ulist_alloc(gfp_t gfp_mask);
void ulist_free(struct ulist *ulist);
int ulist_add(struct ulist *ulist, u64 val, unsigned long aux,
gfp_t gfp_mask);
int ulist_add_merge(struct ulist *ulist, u64 val, unsigned long aux,
unsigned long *old_aux, gfp_t gfp_mask);
int ulist_add(struct ulist *ulist, u64 val, u64 aux, gfp_t gfp_mask);
int ulist_add_merge(struct ulist *ulist, u64 val, u64 aux,
u64 *old_aux, gfp_t gfp_mask);
struct ulist_node *ulist_next(struct ulist *ulist,
struct ulist_iterator *uiter);

75
fs/btrfs/volumes.c
View File

@ -639,7 +639,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
bdev = blkdev_get_by_path(device->name->str, flags, holder);
if (IS_ERR(bdev)) {
printk(KERN_INFO "open %s failed\n", device->name->str);
printk(KERN_INFO "btrfs: open %s failed\n", device->name->str);
goto error;
}
filemap_write_and_wait(bdev->bd_inode->i_mapping);
@ -1475,6 +1475,9 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
free_fs_devices(cur_devices);
}
root->fs_info->num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(root->fs_info);
/*
* at this point, the device is zero sized. We want to
* remove it from the devices list and zero out the old super
@ -1775,16 +1778,22 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
if (seeding_dev) {
ret = init_first_rw_device(trans, root, device);
if (ret)
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto error_trans;
}
ret = btrfs_finish_sprout(trans, root);
if (ret)
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto error_trans;
}
} else {
ret = btrfs_add_device(trans, root, device);
if (ret)
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto error_trans;
}
}
/*
* we've got more storage, clear any full flags on the space
@ -1793,6 +1802,8 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
btrfs_clear_space_info_full(root->fs_info);
unlock_chunks(root);
root->fs_info->num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(root->fs_info);
ret = btrfs_commit_transaction(trans, root);
if (seeding_dev) {
@ -1814,7 +1825,6 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
error_trans:
unlock_chunks(root);
btrfs_abort_transaction(trans, root, ret);
btrfs_end_transaction(trans, root);
rcu_string_free(device->name);
kfree(device);
@ -2804,6 +2814,26 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
}
}
if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
int num_tolerated_disk_barrier_failures;
u64 target = bctl->sys.target;
num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info);
if (num_tolerated_disk_barrier_failures > 0 &&
(target &
(BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID0 |
BTRFS_AVAIL_ALLOC_BIT_SINGLE)))
num_tolerated_disk_barrier_failures = 0;
else if (num_tolerated_disk_barrier_failures > 1 &&
(target &
(BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10)))
num_tolerated_disk_barrier_failures = 1;
fs_info->num_tolerated_disk_barrier_failures =
num_tolerated_disk_barrier_failures;
}
ret = insert_balance_item(fs_info->tree_root, bctl);
if (ret && ret != -EEXIST)
goto out;
@ -2836,6 +2866,11 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
__cancel_balance(fs_info);
}
if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
fs_info->num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info);
}
wake_up(&fs_info->balance_wait_q);
return ret;
@ -3608,12 +3643,16 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans,
ret = __btrfs_alloc_chunk(trans, extent_root, &sys_map,
&sys_chunk_size, &sys_stripe_size,
sys_chunk_offset, alloc_profile);
if (ret)
goto abort;
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
ret = btrfs_add_device(trans, fs_info->chunk_root, device);
if (ret)
goto abort;
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
/*
* Modifying chunk tree needs allocating new blocks from both
@ -3623,19 +3662,19 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans,
*/
ret = __finish_chunk_alloc(trans, extent_root, map, chunk_offset,
chunk_size, stripe_size);
if (ret)
goto abort;
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
ret = __finish_chunk_alloc(trans, extent_root, sys_map,
sys_chunk_offset, sys_chunk_size,
sys_stripe_size);
if (ret)
goto abort;
return 0;
abort:
btrfs_abort_transaction(trans, root, ret);
out:
return ret;
}
@ -3760,7 +3799,7 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
read_unlock(&em_tree->lock);
if (!em) {
printk(KERN_CRIT "unable to find logical %llu len %llu\n",
printk(KERN_CRIT "btrfs: unable to find logical %llu len %llu\n",
(unsigned long long)logical,
(unsigned long long)*length);
BUG();
@ -4217,7 +4256,7 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
total_devs = bbio->num_stripes;
if (map_length < length) {
printk(KERN_CRIT "mapping failed logical %llu bio len %llu "
printk(KERN_CRIT "btrfs: mapping failed logical %llu bio len %llu "
"len %llu\n", (unsigned long long)logical,
(unsigned long long)length,
(unsigned long long)map_length);

8
fs/btrfs/zlib.c
View File

@ -97,7 +97,7 @@ static int zlib_compress_pages(struct list_head *ws,
*total_in = 0;
if (Z_OK != zlib_deflateInit(&workspace->def_strm, 3)) {
printk(KERN_WARNING "deflateInit failed\n");
printk(KERN_WARNING "btrfs: deflateInit failed\n");
ret = -1;
goto out;
}
@ -125,7 +125,7 @@ static int zlib_compress_pages(struct list_head *ws,
while (workspace->def_strm.total_in < len) {
ret = zlib_deflate(&workspace->def_strm, Z_SYNC_FLUSH);
if (ret != Z_OK) {
printk(KERN_DEBUG "btrfs deflate in loop returned %d\n",
printk(KERN_DEBUG "btrfs: deflate in loop returned %d\n",
ret);
zlib_deflateEnd(&workspace->def_strm);
ret = -1;
@ -252,7 +252,7 @@ static int zlib_decompress_biovec(struct list_head *ws, struct page **pages_in,
}
if (Z_OK != zlib_inflateInit2(&workspace->inf_strm, wbits)) {
printk(KERN_WARNING "inflateInit failed\n");
printk(KERN_WARNING "btrfs: inflateInit failed\n");
return -1;
}
while (workspace->inf_strm.total_in < srclen) {
@ -336,7 +336,7 @@ static int zlib_decompress(struct list_head *ws, unsigned char *data_in,
}
if (Z_OK != zlib_inflateInit2(&workspace->inf_strm, wbits)) {
printk(KERN_WARNING "inflateInit failed\n");
printk(KERN_WARNING "btrfs: inflateInit failed\n");
return -1;
}

14
include/trace/events/btrfs.h
View File

@ -445,6 +445,7 @@ TRACE_EVENT(btrfs_delayed_tree_ref,
__field( u64, ref_root )
__field( int, level )
__field( int, type )
__field( u64, seq )
),
TP_fast_assign(
@ -455,17 +456,19 @@ TRACE_EVENT(btrfs_delayed_tree_ref,
__entry->ref_root = full_ref->root;
__entry->level = full_ref->level;
__entry->type = ref->type;
__entry->seq = ref->seq;
),
TP_printk("bytenr = %llu, num_bytes = %llu, action = %s, "
"parent = %llu(%s), ref_root = %llu(%s), level = %d, "
"type = %s",
"type = %s, seq = %llu",
(unsigned long long)__entry->bytenr,
(unsigned long long)__entry->num_bytes,
show_ref_action(__entry->action),
show_root_type(__entry->parent),
show_root_type(__entry->ref_root),
__entry->level, show_ref_type(__entry->type))
__entry->level, show_ref_type(__entry->type),
(unsigned long long)__entry->seq)
);
TRACE_EVENT(btrfs_delayed_data_ref,
@ -485,6 +488,7 @@ TRACE_EVENT(btrfs_delayed_data_ref,
__field( u64, owner )
__field( u64, offset )
__field( int, type )
__field( u64, seq )
),
TP_fast_assign(
@ -496,11 +500,12 @@ TRACE_EVENT(btrfs_delayed_data_ref,
__entry->owner = full_ref->objectid;
__entry->offset = full_ref->offset;
__entry->type = ref->type;
__entry->seq = ref->seq;
),
TP_printk("bytenr = %llu, num_bytes = %llu, action = %s, "
"parent = %llu(%s), ref_root = %llu(%s), owner = %llu, "
"offset = %llu, type = %s",
"offset = %llu, type = %s, seq = %llu",
(unsigned long long)__entry->bytenr,
(unsigned long long)__entry->num_bytes,
show_ref_action(__entry->action),
@ -508,7 +513,8 @@ TRACE_EVENT(btrfs_delayed_data_ref,
show_root_type(__entry->ref_root),
(unsigned long long)__entry->owner,
(unsigned long long)__entry->offset,
show_ref_type(__entry->type))
show_ref_type(__entry->type),
(unsigned long long)__entry->seq)
);
TRACE_EVENT(btrfs_delayed_ref_head,