mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 05:30:52 +07:00
Btrfs: Rewrite btrfs_drop_extents
Rewrite btrfs_drop_extents by using btrfs_duplicate_item, so we can avoid calling lock_extent within transaction. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng
Chris Mason
parent
ad48fd7546
commit
920bbbfb05
@ -2349,12 +2349,9 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
|
||||
int skip_pinned);
|
||||
int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
|
||||
extern const struct file_operations btrfs_file_operations;
|
||||
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_root *root, struct inode *inode,
|
||||
u64 start, u64 end, u64 locked_end,
|
||||
u64 inline_limit, u64 *hint_block, int drop_cache);
|
||||
int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
|
||||
u64 start, u64 end, u64 *hint_byte, int drop_cache);
|
||||
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_root *root,
|
||||
struct inode *inode, u64 start, u64 end);
|
||||
int btrfs_release_file(struct inode *inode, struct file *file);
|
||||
|
||||
|
||||
681
fs/btrfs/file.c
681
fs/btrfs/file.c
@ -265,319 +265,247 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
|
||||
* If an extent intersects the range but is not entirely inside the range
|
||||
* it is either truncated or split. Anything entirely inside the range
|
||||
* is deleted from the tree.
|
||||
*
|
||||
* inline_limit is used to tell this code which offsets in the file to keep
|
||||
* if they contain inline extents.
|
||||
*/
|
||||
noinline int btrfs_drop_extents(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_root *root, struct inode *inode,
|
||||
u64 start, u64 end, u64 locked_end,
|
||||
u64 inline_limit, u64 *hint_byte, int drop_cache)
|
||||
int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
|
||||
u64 start, u64 end, u64 *hint_byte, int drop_cache)
|
||||
{
|
||||
u64 extent_end = 0;
|
||||
u64 search_start = start;
|
||||
u64 ram_bytes = 0;
|
||||
u64 disk_bytenr = 0;
|
||||
u64 orig_locked_end = locked_end;
|
||||
u8 compression;
|
||||
u8 encryption;
|
||||
u16 other_encoding = 0;
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
struct extent_buffer *leaf;
|
||||
struct btrfs_file_extent_item *extent;
|
||||
struct btrfs_file_extent_item *fi;
|
||||
struct btrfs_path *path;
|
||||
struct btrfs_key key;
|
||||
struct btrfs_file_extent_item old;
|
||||
int keep;
|
||||
int slot;
|
||||
int bookend;
|
||||
int found_type = 0;
|
||||
int found_extent;
|
||||
int found_inline;
|
||||
struct btrfs_key new_key;
|
||||
u64 search_start = start;
|
||||
u64 disk_bytenr = 0;
|
||||
u64 num_bytes = 0;
|
||||
u64 extent_offset = 0;
|
||||
u64 extent_end = 0;
|
||||
int del_nr = 0;
|
||||
int del_slot = 0;
|
||||
int extent_type;
|
||||
int recow;
|
||||
int ret;
|
||||
|
||||
inline_limit = 0;
|
||||
if (drop_cache)
|
||||
btrfs_drop_extent_cache(inode, start, end - 1, 0);
|
||||
|
||||
path = btrfs_alloc_path();
|
||||
if (!path)
|
||||
return -ENOMEM;
|
||||
|
||||
while (1) {
|
||||
recow = 0;
|
||||
btrfs_release_path(root, path);
|
||||
ret = btrfs_lookup_file_extent(trans, root, path, inode->i_ino,
|
||||
search_start, -1);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
if (ret > 0) {
|
||||
if (path->slots[0] == 0) {
|
||||
ret = 0;
|
||||
goto out;
|
||||
}
|
||||
path->slots[0]--;
|
||||
break;
|
||||
if (ret > 0 && path->slots[0] > 0 && search_start == start) {
|
||||
leaf = path->nodes[0];
|
||||
btrfs_item_key_to_cpu(leaf, &key, path->slots[0] - 1);
|
||||
if (key.objectid == inode->i_ino &&
|
||||
key.type == BTRFS_EXTENT_DATA_KEY)
|
||||
path->slots[0]--;
|
||||
}
|
||||
next_slot:
|
||||
keep = 0;
|
||||
bookend = 0;
|
||||
found_extent = 0;
|
||||
found_inline = 0;
|
||||
compression = 0;
|
||||
encryption = 0;
|
||||
extent = NULL;
|
||||
leaf = path->nodes[0];
|
||||
slot = path->slots[0];
|
||||
ret = 0;
|
||||
btrfs_item_key_to_cpu(leaf, &key, slot);
|
||||
if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY &&
|
||||
key.offset >= end) {
|
||||
goto out;
|
||||
}
|
||||
if (btrfs_key_type(&key) > BTRFS_EXTENT_DATA_KEY ||
|
||||
key.objectid != inode->i_ino) {
|
||||
goto out;
|
||||
}
|
||||
if (recow) {
|
||||
search_start = max(key.offset, start);
|
||||
continue;
|
||||
}
|
||||
if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY) {
|
||||
extent = btrfs_item_ptr(leaf, slot,
|
||||
struct btrfs_file_extent_item);
|
||||
found_type = btrfs_file_extent_type(leaf, extent);
|
||||
compression = btrfs_file_extent_compression(leaf,
|
||||
extent);
|
||||
encryption = btrfs_file_extent_encryption(leaf,
|
||||
extent);
|
||||
other_encoding = btrfs_file_extent_other_encoding(leaf,
|
||||
extent);
|
||||
if (found_type == BTRFS_FILE_EXTENT_REG ||
|
||||
found_type == BTRFS_FILE_EXTENT_PREALLOC) {
|
||||
extent_end =
|
||||
btrfs_file_extent_disk_bytenr(leaf,
|
||||
extent);
|
||||
if (extent_end)
|
||||
*hint_byte = extent_end;
|
||||
|
||||
extent_end = key.offset +
|
||||
btrfs_file_extent_num_bytes(leaf, extent);
|
||||
ram_bytes = btrfs_file_extent_ram_bytes(leaf,
|
||||
extent);
|
||||
found_extent = 1;
|
||||
} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
|
||||
found_inline = 1;
|
||||
extent_end = key.offset +
|
||||
btrfs_file_extent_inline_len(leaf, extent);
|
||||
next_slot:
|
||||
leaf = path->nodes[0];
|
||||
if (path->slots[0] >= btrfs_header_nritems(leaf)) {
|
||||
BUG_ON(del_nr > 0);
|
||||
ret = btrfs_next_leaf(root, path);
|
||||
if (ret < 0)
|
||||
break;
|
||||
if (ret > 0) {
|
||||
ret = 0;
|
||||
break;
|
||||
}
|
||||
leaf = path->nodes[0];
|
||||
recow = 1;
|
||||
}
|
||||
|
||||
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
|
||||
if (key.objectid > inode->i_ino ||
|
||||
key.type > BTRFS_EXTENT_DATA_KEY || key.offset >= end)
|
||||
break;
|
||||
|
||||
fi = btrfs_item_ptr(leaf, path->slots[0],
|
||||
struct btrfs_file_extent_item);
|
||||
extent_type = btrfs_file_extent_type(leaf, fi);
|
||||
|
||||
if (extent_type == BTRFS_FILE_EXTENT_REG ||
|
||||
extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
|
||||
disk_bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);
|
||||
num_bytes = btrfs_file_extent_disk_num_bytes(leaf, fi);
|
||||
extent_offset = btrfs_file_extent_offset(leaf, fi);
|
||||
extent_end = key.offset +
|
||||
btrfs_file_extent_num_bytes(leaf, fi);
|
||||
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
|
||||
extent_end = key.offset +
|
||||
btrfs_file_extent_inline_len(leaf, fi);
|
||||
} else {
|
||||
WARN_ON(1);
|
||||
extent_end = search_start;
|
||||
}
|
||||
|
||||
/* we found nothing we can drop */
|
||||
if ((!found_extent && !found_inline) ||
|
||||
search_start >= extent_end) {
|
||||
int nextret;
|
||||
u32 nritems;
|
||||
nritems = btrfs_header_nritems(leaf);
|
||||
if (slot >= nritems - 1) {
|
||||
nextret = btrfs_next_leaf(root, path);
|
||||
if (nextret)
|
||||
goto out;
|
||||
recow = 1;
|
||||
} else {
|
||||
path->slots[0]++;
|
||||
}
|
||||
if (extent_end <= search_start) {
|
||||
path->slots[0]++;
|
||||
goto next_slot;
|
||||
}
|
||||
|
||||
if (end <= extent_end && start >= key.offset && found_inline)
|
||||
*hint_byte = EXTENT_MAP_INLINE;
|
||||
|
||||
if (found_extent) {
|
||||
read_extent_buffer(leaf, &old, (unsigned long)extent,
|
||||
sizeof(old));
|
||||
}
|
||||
|
||||
if (end < extent_end && end >= key.offset) {
|
||||
bookend = 1;
|
||||
if (found_inline && start <= key.offset)
|
||||
keep = 1;
|
||||
}
|
||||
|
||||
if (bookend && found_extent) {
|
||||
if (locked_end < extent_end) {
|
||||
ret = try_lock_extent(&BTRFS_I(inode)->io_tree,
|
||||
locked_end, extent_end - 1,
|
||||
GFP_NOFS);
|
||||
if (!ret) {
|
||||
btrfs_release_path(root, path);
|
||||
lock_extent(&BTRFS_I(inode)->io_tree,
|
||||
locked_end, extent_end - 1,
|
||||
GFP_NOFS);
|
||||
locked_end = extent_end;
|
||||
continue;
|
||||
}
|
||||
locked_end = extent_end;
|
||||
}
|
||||
disk_bytenr = le64_to_cpu(old.disk_bytenr);
|
||||
if (disk_bytenr != 0) {
|
||||
ret = btrfs_inc_extent_ref(trans, root,
|
||||
disk_bytenr,
|
||||
le64_to_cpu(old.disk_num_bytes), 0,
|
||||
root->root_key.objectid,
|
||||
key.objectid, key.offset -
|
||||
le64_to_cpu(old.offset));
|
||||
BUG_ON(ret);
|
||||
}
|
||||
}
|
||||
|
||||
if (found_inline) {
|
||||
u64 mask = root->sectorsize - 1;
|
||||
search_start = (extent_end + mask) & ~mask;
|
||||
} else
|
||||
search_start = extent_end;
|
||||
|
||||
/* truncate existing extent */
|
||||
if (start > key.offset) {
|
||||
u64 new_num;
|
||||
u64 old_num;
|
||||
keep = 1;
|
||||
WARN_ON(start & (root->sectorsize - 1));
|
||||
if (found_extent) {
|
||||
new_num = start - key.offset;
|
||||
old_num = btrfs_file_extent_num_bytes(leaf,
|
||||
extent);
|
||||
*hint_byte =
|
||||
btrfs_file_extent_disk_bytenr(leaf,
|
||||
extent);
|
||||
if (btrfs_file_extent_disk_bytenr(leaf,
|
||||
extent)) {
|
||||
inode_sub_bytes(inode, old_num -
|
||||
new_num);
|
||||
}
|
||||
btrfs_set_file_extent_num_bytes(leaf,
|
||||
extent, new_num);
|
||||
btrfs_mark_buffer_dirty(leaf);
|
||||
} else if (key.offset < inline_limit &&
|
||||
(end > extent_end) &&
|
||||
(inline_limit < extent_end)) {
|
||||
u32 new_size;
|
||||
new_size = btrfs_file_extent_calc_inline_size(
|
||||
inline_limit - key.offset);
|
||||
inode_sub_bytes(inode, extent_end -
|
||||
inline_limit);
|
||||
btrfs_set_file_extent_ram_bytes(leaf, extent,
|
||||
new_size);
|
||||
if (!compression && !encryption) {
|
||||
btrfs_truncate_item(trans, root, path,
|
||||
new_size, 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
/* delete the entire extent */
|
||||
if (!keep) {
|
||||
if (found_inline)
|
||||
inode_sub_bytes(inode, extent_end -
|
||||
key.offset);
|
||||
ret = btrfs_del_item(trans, root, path);
|
||||
/* TODO update progress marker and return */
|
||||
BUG_ON(ret);
|
||||
extent = NULL;
|
||||
search_start = max(key.offset, start);
|
||||
if (recow) {
|
||||
btrfs_release_path(root, path);
|
||||
/* the extent will be freed later */
|
||||
continue;
|
||||
}
|
||||
if (bookend && found_inline && start <= key.offset) {
|
||||
u32 new_size;
|
||||
new_size = btrfs_file_extent_calc_inline_size(
|
||||
extent_end - end);
|
||||
inode_sub_bytes(inode, end - key.offset);
|
||||
btrfs_set_file_extent_ram_bytes(leaf, extent,
|
||||
new_size);
|
||||
if (!compression && !encryption)
|
||||
ret = btrfs_truncate_item(trans, root, path,
|
||||
new_size, 0);
|
||||
BUG_ON(ret);
|
||||
}
|
||||
/* create bookend, splitting the extent in two */
|
||||
if (bookend && found_extent) {
|
||||
struct btrfs_key ins;
|
||||
ins.objectid = inode->i_ino;
|
||||
ins.offset = end;
|
||||
btrfs_set_key_type(&ins, BTRFS_EXTENT_DATA_KEY);
|
||||
|
||||
btrfs_release_path(root, path);
|
||||
path->leave_spinning = 1;
|
||||
ret = btrfs_insert_empty_item(trans, root, path, &ins,
|
||||
sizeof(*extent));
|
||||
BUG_ON(ret);
|
||||
/*
|
||||
* | - range to drop - |
|
||||
* | -------- extent -------- |
|
||||
*/
|
||||
if (start > key.offset && end < extent_end) {
|
||||
BUG_ON(del_nr > 0);
|
||||
BUG_ON(extent_type == BTRFS_FILE_EXTENT_INLINE);
|
||||
|
||||
memcpy(&new_key, &key, sizeof(new_key));
|
||||
new_key.offset = start;
|
||||
ret = btrfs_duplicate_item(trans, root, path,
|
||||
&new_key);
|
||||
if (ret == -EAGAIN) {
|
||||
btrfs_release_path(root, path);
|
||||
continue;
|
||||
}
|
||||
if (ret < 0)
|
||||
break;
|
||||
|
||||
leaf = path->nodes[0];
|
||||
extent = btrfs_item_ptr(leaf, path->slots[0],
|
||||
struct btrfs_file_extent_item);
|
||||
write_extent_buffer(leaf, &old,
|
||||
(unsigned long)extent, sizeof(old));
|
||||
fi = btrfs_item_ptr(leaf, path->slots[0] - 1,
|
||||
struct btrfs_file_extent_item);
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi,
|
||||
start - key.offset);
|
||||
|
||||
btrfs_set_file_extent_compression(leaf, extent,
|
||||
compression);
|
||||
btrfs_set_file_extent_encryption(leaf, extent,
|
||||
encryption);
|
||||
btrfs_set_file_extent_other_encoding(leaf, extent,
|
||||
other_encoding);
|
||||
btrfs_set_file_extent_offset(leaf, extent,
|
||||
le64_to_cpu(old.offset) + end - key.offset);
|
||||
WARN_ON(le64_to_cpu(old.num_bytes) <
|
||||
(extent_end - end));
|
||||
btrfs_set_file_extent_num_bytes(leaf, extent,
|
||||
extent_end - end);
|
||||
fi = btrfs_item_ptr(leaf, path->slots[0],
|
||||
struct btrfs_file_extent_item);
|
||||
|
||||
/*
|
||||
* set the ram bytes to the size of the full extent
|
||||
* before splitting. This is a worst case flag,
|
||||
* but its the best we can do because we don't know
|
||||
* how splitting affects compression
|
||||
*/
|
||||
btrfs_set_file_extent_ram_bytes(leaf, extent,
|
||||
ram_bytes);
|
||||
btrfs_set_file_extent_type(leaf, extent, found_type);
|
||||
extent_offset += start - key.offset;
|
||||
btrfs_set_file_extent_offset(leaf, fi, extent_offset);
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi,
|
||||
extent_end - start);
|
||||
btrfs_mark_buffer_dirty(leaf);
|
||||
|
||||
btrfs_unlock_up_safe(path, 1);
|
||||
btrfs_mark_buffer_dirty(path->nodes[0]);
|
||||
btrfs_set_lock_blocking(path->nodes[0]);
|
||||
|
||||
path->leave_spinning = 0;
|
||||
btrfs_release_path(root, path);
|
||||
if (disk_bytenr != 0)
|
||||
inode_add_bytes(inode, extent_end - end);
|
||||
}
|
||||
|
||||
if (found_extent && !keep) {
|
||||
u64 old_disk_bytenr = le64_to_cpu(old.disk_bytenr);
|
||||
|
||||
if (old_disk_bytenr != 0) {
|
||||
inode_sub_bytes(inode,
|
||||
le64_to_cpu(old.num_bytes));
|
||||
ret = btrfs_free_extent(trans, root,
|
||||
old_disk_bytenr,
|
||||
le64_to_cpu(old.disk_num_bytes),
|
||||
0, root->root_key.objectid,
|
||||
key.objectid, key.offset -
|
||||
le64_to_cpu(old.offset));
|
||||
if (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);
|
||||
BUG_ON(ret);
|
||||
*hint_byte = old_disk_bytenr;
|
||||
*hint_byte = disk_bytenr;
|
||||
}
|
||||
key.offset = start;
|
||||
}
|
||||
/*
|
||||
* | ---- range to drop ----- |
|
||||
* | -------- extent -------- |
|
||||
*/
|
||||
if (start <= key.offset && end < extent_end) {
|
||||
BUG_ON(extent_type == BTRFS_FILE_EXTENT_INLINE);
|
||||
|
||||
memcpy(&new_key, &key, sizeof(new_key));
|
||||
new_key.offset = end;
|
||||
btrfs_set_item_key_safe(trans, root, path, &new_key);
|
||||
|
||||
extent_offset += end - key.offset;
|
||||
btrfs_set_file_extent_offset(leaf, fi, extent_offset);
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi,
|
||||
extent_end - end);
|
||||
btrfs_mark_buffer_dirty(leaf);
|
||||
if (disk_bytenr > 0) {
|
||||
inode_sub_bytes(inode, end - key.offset);
|
||||
*hint_byte = disk_bytenr;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (search_start >= end) {
|
||||
ret = 0;
|
||||
goto out;
|
||||
search_start = extent_end;
|
||||
/*
|
||||
* | ---- range to drop ----- |
|
||||
* | -------- extent -------- |
|
||||
*/
|
||||
if (start > key.offset && end >= extent_end) {
|
||||
BUG_ON(del_nr > 0);
|
||||
BUG_ON(extent_type == BTRFS_FILE_EXTENT_INLINE);
|
||||
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi,
|
||||
start - key.offset);
|
||||
btrfs_mark_buffer_dirty(leaf);
|
||||
if (disk_bytenr > 0) {
|
||||
inode_sub_bytes(inode, extent_end - start);
|
||||
*hint_byte = disk_bytenr;
|
||||
}
|
||||
if (end == extent_end)
|
||||
break;
|
||||
|
||||
path->slots[0]++;
|
||||
goto next_slot;
|
||||
}
|
||||
|
||||
/*
|
||||
* | ---- range to drop ----- |
|
||||
* | ------ extent ------ |
|
||||
*/
|
||||
if (start <= key.offset && end >= extent_end) {
|
||||
if (del_nr == 0) {
|
||||
del_slot = path->slots[0];
|
||||
del_nr = 1;
|
||||
} else {
|
||||
BUG_ON(del_slot + del_nr != path->slots[0]);
|
||||
del_nr++;
|
||||
}
|
||||
|
||||
if (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) {
|
||||
ret = btrfs_free_extent(trans, root,
|
||||
disk_bytenr, num_bytes, 0,
|
||||
root->root_key.objectid,
|
||||
key.objectid, key.offset -
|
||||
extent_offset);
|
||||
BUG_ON(ret);
|
||||
inode_sub_bytes(inode,
|
||||
extent_end - key.offset);
|
||||
*hint_byte = disk_bytenr;
|
||||
}
|
||||
|
||||
if (end == extent_end)
|
||||
break;
|
||||
|
||||
if (path->slots[0] + 1 < btrfs_header_nritems(leaf)) {
|
||||
path->slots[0]++;
|
||||
goto next_slot;
|
||||
}
|
||||
|
||||
ret = btrfs_del_items(trans, root, path, del_slot,
|
||||
del_nr);
|
||||
BUG_ON(ret);
|
||||
|
||||
del_nr = 0;
|
||||
del_slot = 0;
|
||||
|
||||
btrfs_release_path(root, path);
|
||||
continue;
|
||||
}
|
||||
|
||||
BUG_ON(1);
|
||||
}
|
||||
out:
|
||||
|
||||
if (del_nr > 0) {
|
||||
ret = btrfs_del_items(trans, root, path, del_slot, del_nr);
|
||||
BUG_ON(ret);
|
||||
}
|
||||
|
||||
btrfs_free_path(path);
|
||||
if (locked_end > orig_locked_end) {
|
||||
unlock_extent(&BTRFS_I(inode)->io_tree, orig_locked_end,
|
||||
locked_end - 1, GFP_NOFS);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
@ -620,23 +548,23 @@ static int extent_mergeable(struct extent_buffer *leaf, int slot,
|
||||
* two or three.
|
||||
*/
|
||||
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_root *root,
|
||||
struct inode *inode, u64 start, u64 end)
|
||||
{
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
struct extent_buffer *leaf;
|
||||
struct btrfs_path *path;
|
||||
struct btrfs_file_extent_item *fi;
|
||||
struct btrfs_key key;
|
||||
struct btrfs_key new_key;
|
||||
u64 bytenr;
|
||||
u64 num_bytes;
|
||||
u64 extent_end;
|
||||
u64 orig_offset;
|
||||
u64 other_start;
|
||||
u64 other_end;
|
||||
u64 split = start;
|
||||
u64 locked_end = end;
|
||||
int extent_type;
|
||||
int split_end = 1;
|
||||
u64 split;
|
||||
int del_nr = 0;
|
||||
int del_slot = 0;
|
||||
int ret;
|
||||
|
||||
btrfs_drop_extent_cache(inode, start, end - 1, 0);
|
||||
@ -644,12 +572,10 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
|
||||
path = btrfs_alloc_path();
|
||||
BUG_ON(!path);
|
||||
again:
|
||||
split = start;
|
||||
key.objectid = inode->i_ino;
|
||||
key.type = BTRFS_EXTENT_DATA_KEY;
|
||||
if (split == start)
|
||||
key.offset = split;
|
||||
else
|
||||
key.offset = split - 1;
|
||||
key.offset = split;
|
||||
|
||||
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
|
||||
if (ret > 0 && path->slots[0] > 0)
|
||||
@ -661,8 +587,8 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
|
||||
key.type != BTRFS_EXTENT_DATA_KEY);
|
||||
fi = btrfs_item_ptr(leaf, path->slots[0],
|
||||
struct btrfs_file_extent_item);
|
||||
extent_type = btrfs_file_extent_type(leaf, fi);
|
||||
BUG_ON(extent_type != BTRFS_FILE_EXTENT_PREALLOC);
|
||||
BUG_ON(btrfs_file_extent_type(leaf, fi) !=
|
||||
BTRFS_FILE_EXTENT_PREALLOC);
|
||||
extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
|
||||
BUG_ON(key.offset > start || extent_end < end);
|
||||
|
||||
@ -670,150 +596,91 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
|
||||
num_bytes = btrfs_file_extent_disk_num_bytes(leaf, fi);
|
||||
orig_offset = key.offset - btrfs_file_extent_offset(leaf, fi);
|
||||
|
||||
if (key.offset == start)
|
||||
split = end;
|
||||
while (start > key.offset || end < extent_end) {
|
||||
if (key.offset == start)
|
||||
split = end;
|
||||
|
||||
if (key.offset == start && extent_end == end) {
|
||||
int del_nr = 0;
|
||||
int del_slot = 0;
|
||||
other_start = end;
|
||||
other_end = 0;
|
||||
if (extent_mergeable(leaf, path->slots[0] + 1, inode->i_ino,
|
||||
bytenr, &other_start, &other_end)) {
|
||||
extent_end = other_end;
|
||||
del_slot = path->slots[0] + 1;
|
||||
del_nr++;
|
||||
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
|
||||
0, root->root_key.objectid,
|
||||
inode->i_ino, orig_offset);
|
||||
BUG_ON(ret);
|
||||
}
|
||||
other_start = 0;
|
||||
other_end = start;
|
||||
if (extent_mergeable(leaf, path->slots[0] - 1, inode->i_ino,
|
||||
bytenr, &other_start, &other_end)) {
|
||||
key.offset = other_start;
|
||||
del_slot = path->slots[0];
|
||||
del_nr++;
|
||||
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
|
||||
0, root->root_key.objectid,
|
||||
inode->i_ino, orig_offset);
|
||||
BUG_ON(ret);
|
||||
}
|
||||
split_end = 0;
|
||||
if (del_nr == 0) {
|
||||
btrfs_set_file_extent_type(leaf, fi,
|
||||
BTRFS_FILE_EXTENT_REG);
|
||||
goto done;
|
||||
memcpy(&new_key, &key, sizeof(new_key));
|
||||
new_key.offset = split;
|
||||
ret = btrfs_duplicate_item(trans, root, path, &new_key);
|
||||
if (ret == -EAGAIN) {
|
||||
btrfs_release_path(root, path);
|
||||
goto again;
|
||||
}
|
||||
BUG_ON(ret < 0);
|
||||
|
||||
fi = btrfs_item_ptr(leaf, del_slot - 1,
|
||||
leaf = path->nodes[0];
|
||||
fi = btrfs_item_ptr(leaf, path->slots[0] - 1,
|
||||
struct btrfs_file_extent_item);
|
||||
btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi,
|
||||
extent_end - key.offset);
|
||||
split - key.offset);
|
||||
|
||||
fi = btrfs_item_ptr(leaf, path->slots[0],
|
||||
struct btrfs_file_extent_item);
|
||||
|
||||
btrfs_set_file_extent_offset(leaf, fi, split - orig_offset);
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi,
|
||||
extent_end - split);
|
||||
btrfs_mark_buffer_dirty(leaf);
|
||||
|
||||
ret = btrfs_del_items(trans, root, path, del_slot, del_nr);
|
||||
ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes, 0,
|
||||
root->root_key.objectid,
|
||||
inode->i_ino, orig_offset);
|
||||
BUG_ON(ret);
|
||||
goto release;
|
||||
} else if (split == start) {
|
||||
if (locked_end < extent_end) {
|
||||
ret = try_lock_extent(&BTRFS_I(inode)->io_tree,
|
||||
locked_end, extent_end - 1, GFP_NOFS);
|
||||
if (!ret) {
|
||||
btrfs_release_path(root, path);
|
||||
lock_extent(&BTRFS_I(inode)->io_tree,
|
||||
locked_end, extent_end - 1, GFP_NOFS);
|
||||
locked_end = extent_end;
|
||||
goto again;
|
||||
}
|
||||
locked_end = extent_end;
|
||||
}
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi, split - key.offset);
|
||||
} else {
|
||||
BUG_ON(key.offset != start);
|
||||
key.offset = split;
|
||||
btrfs_set_file_extent_offset(leaf, fi, key.offset -
|
||||
orig_offset);
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi, extent_end - split);
|
||||
btrfs_set_item_key_safe(trans, root, path, &key);
|
||||
extent_end = split;
|
||||
}
|
||||
|
||||
if (extent_end == end) {
|
||||
split_end = 0;
|
||||
extent_type = BTRFS_FILE_EXTENT_REG;
|
||||
}
|
||||
if (extent_end == end && split == start) {
|
||||
other_start = end;
|
||||
other_end = 0;
|
||||
if (extent_mergeable(leaf, path->slots[0] + 1, inode->i_ino,
|
||||
bytenr, &other_start, &other_end)) {
|
||||
path->slots[0]++;
|
||||
fi = btrfs_item_ptr(leaf, path->slots[0],
|
||||
struct btrfs_file_extent_item);
|
||||
key.offset = split;
|
||||
btrfs_set_item_key_safe(trans, root, path, &key);
|
||||
btrfs_set_file_extent_offset(leaf, fi, key.offset -
|
||||
orig_offset);
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi,
|
||||
other_end - split);
|
||||
goto done;
|
||||
}
|
||||
}
|
||||
if (extent_end == end && split == end) {
|
||||
other_start = 0;
|
||||
other_end = start;
|
||||
if (extent_mergeable(leaf, path->slots[0] - 1 , inode->i_ino,
|
||||
bytenr, &other_start, &other_end)) {
|
||||
if (split == start) {
|
||||
key.offset = start;
|
||||
} else {
|
||||
BUG_ON(start != key.offset);
|
||||
path->slots[0]--;
|
||||
fi = btrfs_item_ptr(leaf, path->slots[0],
|
||||
struct btrfs_file_extent_item);
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi, extent_end -
|
||||
other_start);
|
||||
goto done;
|
||||
extent_end = end;
|
||||
}
|
||||
}
|
||||
|
||||
btrfs_mark_buffer_dirty(leaf);
|
||||
|
||||
ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes, 0,
|
||||
root->root_key.objectid,
|
||||
inode->i_ino, orig_offset);
|
||||
BUG_ON(ret);
|
||||
btrfs_release_path(root, path);
|
||||
|
||||
key.offset = start;
|
||||
ret = btrfs_insert_empty_item(trans, root, path, &key, sizeof(*fi));
|
||||
BUG_ON(ret);
|
||||
|
||||
leaf = path->nodes[0];
|
||||
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_type(leaf, fi, extent_type);
|
||||
btrfs_set_file_extent_disk_bytenr(leaf, fi, bytenr);
|
||||
btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
|
||||
btrfs_set_file_extent_offset(leaf, fi, key.offset - orig_offset);
|
||||
btrfs_set_file_extent_num_bytes(leaf, fi, extent_end - key.offset);
|
||||
btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
|
||||
btrfs_set_file_extent_compression(leaf, fi, 0);
|
||||
btrfs_set_file_extent_encryption(leaf, fi, 0);
|
||||
btrfs_set_file_extent_other_encoding(leaf, fi, 0);
|
||||
done:
|
||||
|
||||
other_start = end;
|
||||
other_end = 0;
|
||||
if (extent_mergeable(leaf, path->slots[0] + 1, inode->i_ino,
|
||||
bytenr, &other_start, &other_end)) {
|
||||
extent_end = other_end;
|
||||
del_slot = path->slots[0] + 1;
|
||||
del_nr++;
|
||||
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
|
||||
0, root->root_key.objectid,
|
||||
inode->i_ino, orig_offset);
|
||||
BUG_ON(ret);
|
||||
}
|
||||
other_start = 0;
|
||||
other_end = start;
|
||||
if (extent_mergeable(leaf, path->slots[0] - 1, inode->i_ino,
|
||||
bytenr, &other_start, &other_end)) {
|
||||
key.offset = other_start;
|
||||
del_slot = path->slots[0];
|
||||
del_nr++;
|
||||
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
|
||||
0, root->root_key.objectid,
|
||||
inode->i_ino, orig_offset);
|
||||
BUG_ON(ret);
|
||||
}
|
||||
if (del_nr == 0) {
|
||||
btrfs_set_file_extent_type(leaf, fi,
|
||||
BTRFS_FILE_EXTENT_REG);
|
||||
btrfs_mark_buffer_dirty(leaf);
|
||||
goto out;
|
||||
}
|
||||
|
||||
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_num_bytes(leaf, fi,
|
||||
extent_end - key.offset);
|
||||
btrfs_mark_buffer_dirty(leaf);
|
||||
|
||||
release:
|
||||
btrfs_release_path(root, path);
|
||||
if (split_end && split == start) {
|
||||
split = end;
|
||||
goto again;
|
||||
}
|
||||
if (locked_end > end) {
|
||||
unlock_extent(&BTRFS_I(inode)->io_tree, end, locked_end - 1,
|
||||
GFP_NOFS);
|
||||
}
|
||||
ret = btrfs_del_items(trans, root, path, del_slot, del_nr);
|
||||
BUG_ON(ret);
|
||||
out:
|
||||
btrfs_free_path(path);
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -230,8 +230,7 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans,
|
||||
return 1;
|
||||
}
|
||||
|
||||
ret = btrfs_drop_extents(trans, root, inode, start,
|
||||
aligned_end, aligned_end, start,
|
||||
ret = btrfs_drop_extents(trans, inode, start, aligned_end,
|
||||
&hint_byte, 1);
|
||||
BUG_ON(ret);
|
||||
|
||||
@ -1596,7 +1595,6 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
|
||||
struct inode *inode, u64 file_pos,
|
||||
u64 disk_bytenr, u64 disk_num_bytes,
|
||||
u64 num_bytes, u64 ram_bytes,
|
||||
u64 locked_end,
|
||||
u8 compression, u8 encryption,
|
||||
u16 other_encoding, int extent_type)
|
||||
{
|
||||
@ -1622,9 +1620,8 @@ 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, root, inode, file_pos,
|
||||
file_pos + num_bytes, locked_end,
|
||||
file_pos, &hint, 0);
|
||||
ret = btrfs_drop_extents(trans, inode, file_pos, file_pos + num_bytes,
|
||||
&hint, 0);
|
||||
BUG_ON(ret);
|
||||
|
||||
ins.objectid = inode->i_ino;
|
||||
@ -1746,7 +1743,7 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
|
||||
compressed = 1;
|
||||
if (test_bit(BTRFS_ORDERED_PREALLOC, &ordered_extent->flags)) {
|
||||
BUG_ON(compressed);
|
||||
ret = btrfs_mark_extent_written(trans, root, inode,
|
||||
ret = btrfs_mark_extent_written(trans, inode,
|
||||
ordered_extent->file_offset,
|
||||
ordered_extent->file_offset +
|
||||
ordered_extent->len);
|
||||
@ -1758,8 +1755,6 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
|
||||
ordered_extent->disk_len,
|
||||
ordered_extent->len,
|
||||
ordered_extent->len,
|
||||
ordered_extent->file_offset +
|
||||
ordered_extent->len,
|
||||
compressed, 0, 0,
|
||||
BTRFS_FILE_EXTENT_REG);
|
||||
unpin_extent_cache(&BTRFS_I(inode)->extent_tree,
|
||||
@ -3209,11 +3204,9 @@ int btrfs_cont_expand(struct inode *inode, loff_t size)
|
||||
if (test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
|
||||
u64 hint_byte = 0;
|
||||
hole_size = last_byte - cur_offset;
|
||||
err = btrfs_drop_extents(trans, root, inode,
|
||||
cur_offset,
|
||||
err = btrfs_drop_extents(trans, inode, cur_offset,
|
||||
cur_offset + hole_size,
|
||||
block_end,
|
||||
cur_offset, &hint_byte, 1);
|
||||
&hint_byte, 1);
|
||||
if (err)
|
||||
break;
|
||||
|
||||
@ -5643,7 +5636,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
|
||||
|
||||
static int prealloc_file_range(struct btrfs_trans_handle *trans,
|
||||
struct inode *inode, u64 start, u64 end,
|
||||
u64 locked_end, u64 alloc_hint, int mode)
|
||||
u64 alloc_hint, int mode)
|
||||
{
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
struct btrfs_key ins;
|
||||
@ -5669,8 +5662,7 @@ static int prealloc_file_range(struct btrfs_trans_handle *trans,
|
||||
ret = insert_reserved_file_extent(trans, inode,
|
||||
cur_offset, ins.objectid,
|
||||
ins.offset, ins.offset,
|
||||
ins.offset, locked_end,
|
||||
0, 0, 0,
|
||||
ins.offset, 0, 0, 0,
|
||||
BTRFS_FILE_EXTENT_PREALLOC);
|
||||
BUG_ON(ret);
|
||||
btrfs_drop_extent_cache(inode, cur_offset,
|
||||
@ -5779,8 +5771,7 @@ static long btrfs_fallocate(struct inode *inode, int mode,
|
||||
last_byte = (last_byte + mask) & ~mask;
|
||||
if (em->block_start == EXTENT_MAP_HOLE) {
|
||||
ret = prealloc_file_range(trans, inode, cur_offset,
|
||||
last_byte, locked_end + 1,
|
||||
alloc_hint, mode);
|
||||
last_byte, alloc_hint, mode);
|
||||
if (ret < 0) {
|
||||
free_extent_map(em);
|
||||
break;
|
||||
|
||||
@ -1027,8 +1027,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
|
||||
BUG_ON(!trans);
|
||||
|
||||
/* punch hole in destination first */
|
||||
btrfs_drop_extents(trans, root, inode, off, off + len,
|
||||
off + len, 0, &hint_byte, 1);
|
||||
btrfs_drop_extents(trans, inode, off, off + len, &hint_byte, 1);
|
||||
|
||||
/* clone data */
|
||||
key.objectid = src->i_ino;
|
||||
|
||||
@ -542,8 +542,8 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
|
||||
|
||||
saved_nbytes = inode_get_bytes(inode);
|
||||
/* drop any overlapping extents */
|
||||
ret = btrfs_drop_extents(trans, root, inode,
|
||||
start, extent_end, extent_end, start, &alloc_hint, 1);
|
||||
ret = btrfs_drop_extents(trans, inode, start, extent_end,
|
||||
&alloc_hint, 1);
|
||||
BUG_ON(ret);
|
||||
|
||||
if (found_type == BTRFS_FILE_EXTENT_REG ||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user