mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 11:06:40 +07:00
ca2ec32658
Pull vfs update from Al Viro: "Part one: - struct filename-related cleanups - saner iov_iter_init() replacements (and switching the syscalls to use of those) - ntfs switch to ->write_iter() (Anton) - aio cleanups and splitting iocb into common and async parts (Christoph) - assorted fixes (me, bfields, Andrew Elble) There's a lot more, including the completion of switchover to ->{read,write}_iter(), d_inode/d_backing_inode annotations, f_flags race fixes, etc, but that goes after #for-davem merge. David has pulled it, and once it's in I'll send the next vfs pull request" * 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (35 commits) sg_start_req(): use import_iovec() sg_start_req(): make sure that there's not too many elements in iovec blk_rq_map_user(): use import_single_range() sg_io(): use import_iovec() process_vm_access: switch to {compat_,}import_iovec() switch keyctl_instantiate_key_common() to iov_iter switch {compat_,}do_readv_writev() to {compat_,}import_iovec() aio_setup_vectored_rw(): switch to {compat_,}import_iovec() vmsplice_to_user(): switch to import_iovec() kill aio_setup_single_vector() aio: simplify arguments of aio_setup_..._rw() aio: lift iov_iter_init() into aio_setup_..._rw() lift iov_iter into {compat_,}do_readv_writev() NFS: fix BUG() crash in notify_change() with patch to chown_common() dcache: return -ESTALE not -EBUSY on distributed fs race NTFS: Version 2.1.32 - Update file write from aio_write to write_iter. VFS: Add iov_iter_fault_in_multipages_readable() drop bogus check in file_open_root() switch security_inode_getattr() to struct path * constify tomoyo_realpath_from_path() ...
2763 lines
67 KiB
C
2763 lines
67 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
|
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
|
*
|
|
* file.c
|
|
*
|
|
* File open, close, extend, truncate
|
|
*
|
|
* Copyright (C) 2002, 2004 Oracle. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#include <linux/capability.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/types.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/uio.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/splice.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/writeback.h>
|
|
#include <linux/falloc.h>
|
|
#include <linux/quotaops.h>
|
|
#include <linux/blkdev.h>
|
|
|
|
#include <cluster/masklog.h>
|
|
|
|
#include "ocfs2.h"
|
|
|
|
#include "alloc.h"
|
|
#include "aops.h"
|
|
#include "dir.h"
|
|
#include "dlmglue.h"
|
|
#include "extent_map.h"
|
|
#include "file.h"
|
|
#include "sysfile.h"
|
|
#include "inode.h"
|
|
#include "ioctl.h"
|
|
#include "journal.h"
|
|
#include "locks.h"
|
|
#include "mmap.h"
|
|
#include "suballoc.h"
|
|
#include "super.h"
|
|
#include "xattr.h"
|
|
#include "acl.h"
|
|
#include "quota.h"
|
|
#include "refcounttree.h"
|
|
#include "ocfs2_trace.h"
|
|
|
|
#include "buffer_head_io.h"
|
|
|
|
static int ocfs2_init_file_private(struct inode *inode, struct file *file)
|
|
{
|
|
struct ocfs2_file_private *fp;
|
|
|
|
fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
|
|
if (!fp)
|
|
return -ENOMEM;
|
|
|
|
fp->fp_file = file;
|
|
mutex_init(&fp->fp_mutex);
|
|
ocfs2_file_lock_res_init(&fp->fp_flock, fp);
|
|
file->private_data = fp;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ocfs2_free_file_private(struct inode *inode, struct file *file)
|
|
{
|
|
struct ocfs2_file_private *fp = file->private_data;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
if (fp) {
|
|
ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
|
|
ocfs2_lock_res_free(&fp->fp_flock);
|
|
kfree(fp);
|
|
file->private_data = NULL;
|
|
}
|
|
}
|
|
|
|
static int ocfs2_file_open(struct inode *inode, struct file *file)
|
|
{
|
|
int status;
|
|
int mode = file->f_flags;
|
|
struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
|
trace_ocfs2_file_open(inode, file, file->f_path.dentry,
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
file->f_path.dentry->d_name.len,
|
|
file->f_path.dentry->d_name.name, mode);
|
|
|
|
if (file->f_mode & FMODE_WRITE)
|
|
dquot_initialize(inode);
|
|
|
|
spin_lock(&oi->ip_lock);
|
|
|
|
/* Check that the inode hasn't been wiped from disk by another
|
|
* node. If it hasn't then we're safe as long as we hold the
|
|
* spin lock until our increment of open count. */
|
|
if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
|
|
spin_unlock(&oi->ip_lock);
|
|
|
|
status = -ENOENT;
|
|
goto leave;
|
|
}
|
|
|
|
if (mode & O_DIRECT)
|
|
oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;
|
|
|
|
oi->ip_open_count++;
|
|
spin_unlock(&oi->ip_lock);
|
|
|
|
status = ocfs2_init_file_private(inode, file);
|
|
if (status) {
|
|
/*
|
|
* We want to set open count back if we're failing the
|
|
* open.
|
|
*/
|
|
spin_lock(&oi->ip_lock);
|
|
oi->ip_open_count--;
|
|
spin_unlock(&oi->ip_lock);
|
|
}
|
|
|
|
leave:
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_file_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
|
spin_lock(&oi->ip_lock);
|
|
if (!--oi->ip_open_count)
|
|
oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
|
|
|
|
trace_ocfs2_file_release(inode, file, file->f_path.dentry,
|
|
oi->ip_blkno,
|
|
file->f_path.dentry->d_name.len,
|
|
file->f_path.dentry->d_name.name,
|
|
oi->ip_open_count);
|
|
spin_unlock(&oi->ip_lock);
|
|
|
|
ocfs2_free_file_private(inode, file);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ocfs2_dir_open(struct inode *inode, struct file *file)
|
|
{
|
|
return ocfs2_init_file_private(inode, file);
|
|
}
|
|
|
|
static int ocfs2_dir_release(struct inode *inode, struct file *file)
|
|
{
|
|
ocfs2_free_file_private(inode, file);
|
|
return 0;
|
|
}
|
|
|
|
static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end,
|
|
int datasync)
|
|
{
|
|
int err = 0;
|
|
struct inode *inode = file->f_mapping->host;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
journal_t *journal = osb->journal->j_journal;
|
|
int ret;
|
|
tid_t commit_tid;
|
|
bool needs_barrier = false;
|
|
|
|
trace_ocfs2_sync_file(inode, file, file->f_path.dentry,
|
|
OCFS2_I(inode)->ip_blkno,
|
|
file->f_path.dentry->d_name.len,
|
|
file->f_path.dentry->d_name.name,
|
|
(unsigned long long)datasync);
|
|
|
|
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
|
|
return -EROFS;
|
|
|
|
err = filemap_write_and_wait_range(inode->i_mapping, start, end);
|
|
if (err)
|
|
return err;
|
|
|
|
commit_tid = datasync ? oi->i_datasync_tid : oi->i_sync_tid;
|
|
if (journal->j_flags & JBD2_BARRIER &&
|
|
!jbd2_trans_will_send_data_barrier(journal, commit_tid))
|
|
needs_barrier = true;
|
|
err = jbd2_complete_transaction(journal, commit_tid);
|
|
if (needs_barrier) {
|
|
ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
|
|
if (!err)
|
|
err = ret;
|
|
}
|
|
|
|
if (err)
|
|
mlog_errno(err);
|
|
|
|
return (err < 0) ? -EIO : 0;
|
|
}
|
|
|
|
int ocfs2_should_update_atime(struct inode *inode,
|
|
struct vfsmount *vfsmnt)
|
|
{
|
|
struct timespec now;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
|
|
return 0;
|
|
|
|
if ((inode->i_flags & S_NOATIME) ||
|
|
((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
|
|
return 0;
|
|
|
|
/*
|
|
* We can be called with no vfsmnt structure - NFSD will
|
|
* sometimes do this.
|
|
*
|
|
* Note that our action here is different than touch_atime() -
|
|
* if we can't tell whether this is a noatime mount, then we
|
|
* don't know whether to trust the value of s_atime_quantum.
|
|
*/
|
|
if (vfsmnt == NULL)
|
|
return 0;
|
|
|
|
if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
|
|
((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
|
|
return 0;
|
|
|
|
if (vfsmnt->mnt_flags & MNT_RELATIME) {
|
|
if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
|
|
(timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
now = CURRENT_TIME;
|
|
if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
int ocfs2_update_inode_atime(struct inode *inode,
|
|
struct buffer_head *bh)
|
|
{
|
|
int ret;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
handle_t *handle;
|
|
struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out_commit;
|
|
}
|
|
|
|
/*
|
|
* Don't use ocfs2_mark_inode_dirty() here as we don't always
|
|
* have i_mutex to guard against concurrent changes to other
|
|
* inode fields.
|
|
*/
|
|
inode->i_atime = CURRENT_TIME;
|
|
di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
|
|
di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
|
|
ocfs2_update_inode_fsync_trans(handle, inode, 0);
|
|
ocfs2_journal_dirty(handle, bh);
|
|
|
|
out_commit:
|
|
ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
int ocfs2_set_inode_size(handle_t *handle,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
u64 new_i_size)
|
|
{
|
|
int status;
|
|
|
|
i_size_write(inode, new_i_size);
|
|
inode->i_blocks = ocfs2_inode_sector_count(inode);
|
|
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
|
|
|
|
status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
bail:
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_simple_size_update(struct inode *inode,
|
|
struct buffer_head *di_bh,
|
|
u64 new_i_size)
|
|
{
|
|
int ret;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
handle_t *handle = NULL;
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_set_inode_size(handle, inode, di_bh,
|
|
new_i_size);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
|
|
ocfs2_update_inode_fsync_trans(handle, inode, 0);
|
|
ocfs2_commit_trans(osb, handle);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_cow_file_pos(struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
u64 offset)
|
|
{
|
|
int status;
|
|
u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
|
|
unsigned int num_clusters = 0;
|
|
unsigned int ext_flags = 0;
|
|
|
|
/*
|
|
* If the new offset is aligned to the range of the cluster, there is
|
|
* no space for ocfs2_zero_range_for_truncate to fill, so no need to
|
|
* CoW either.
|
|
*/
|
|
if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0)
|
|
return 0;
|
|
|
|
status = ocfs2_get_clusters(inode, cpos, &phys,
|
|
&num_clusters, &ext_flags);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
goto out;
|
|
}
|
|
|
|
if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
|
|
goto out;
|
|
|
|
return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1);
|
|
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
u64 new_i_size)
|
|
{
|
|
int status;
|
|
handle_t *handle;
|
|
struct ocfs2_dinode *di;
|
|
u64 cluster_bytes;
|
|
|
|
/*
|
|
* We need to CoW the cluster contains the offset if it is reflinked
|
|
* since we will call ocfs2_zero_range_for_truncate later which will
|
|
* write "0" from offset to the end of the cluster.
|
|
*/
|
|
status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
/* TODO: This needs to actually orphan the inode in this
|
|
* transaction. */
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out;
|
|
}
|
|
|
|
status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto out_commit;
|
|
}
|
|
|
|
/*
|
|
* Do this before setting i_size.
|
|
*/
|
|
cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
|
|
status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
|
|
cluster_bytes);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
goto out_commit;
|
|
}
|
|
|
|
i_size_write(inode, new_i_size);
|
|
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
|
|
|
|
di = (struct ocfs2_dinode *) fe_bh->b_data;
|
|
di->i_size = cpu_to_le64(new_i_size);
|
|
di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
|
|
di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
|
|
ocfs2_update_inode_fsync_trans(handle, inode, 0);
|
|
|
|
ocfs2_journal_dirty(handle, fe_bh);
|
|
|
|
out_commit:
|
|
ocfs2_commit_trans(osb, handle);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_truncate_file(struct inode *inode,
|
|
struct buffer_head *di_bh,
|
|
u64 new_i_size)
|
|
{
|
|
int status = 0;
|
|
struct ocfs2_dinode *fe = NULL;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
/* We trust di_bh because it comes from ocfs2_inode_lock(), which
|
|
* already validated it */
|
|
fe = (struct ocfs2_dinode *) di_bh->b_data;
|
|
|
|
trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)le64_to_cpu(fe->i_size),
|
|
(unsigned long long)new_i_size);
|
|
|
|
mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
|
|
"Inode %llu, inode i_size = %lld != di "
|
|
"i_size = %llu, i_flags = 0x%x\n",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
i_size_read(inode),
|
|
(unsigned long long)le64_to_cpu(fe->i_size),
|
|
le32_to_cpu(fe->i_flags));
|
|
|
|
if (new_i_size > le64_to_cpu(fe->i_size)) {
|
|
trace_ocfs2_truncate_file_error(
|
|
(unsigned long long)le64_to_cpu(fe->i_size),
|
|
(unsigned long long)new_i_size);
|
|
status = -EINVAL;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
down_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
|
|
ocfs2_resv_discard(&osb->osb_la_resmap,
|
|
&OCFS2_I(inode)->ip_la_data_resv);
|
|
|
|
/*
|
|
* The inode lock forced other nodes to sync and drop their
|
|
* pages, which (correctly) happens even if we have a truncate
|
|
* without allocation change - ocfs2 cluster sizes can be much
|
|
* greater than page size, so we have to truncate them
|
|
* anyway.
|
|
*/
|
|
unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
|
|
truncate_inode_pages(inode->i_mapping, new_i_size);
|
|
|
|
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
|
|
i_size_read(inode), 1);
|
|
if (status)
|
|
mlog_errno(status);
|
|
|
|
goto bail_unlock_sem;
|
|
}
|
|
|
|
/* alright, we're going to need to do a full blown alloc size
|
|
* change. Orphan the inode so that recovery can complete the
|
|
* truncate if necessary. This does the task of marking
|
|
* i_size. */
|
|
status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail_unlock_sem;
|
|
}
|
|
|
|
status = ocfs2_commit_truncate(osb, inode, di_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail_unlock_sem;
|
|
}
|
|
|
|
/* TODO: orphan dir cleanup here. */
|
|
bail_unlock_sem:
|
|
up_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
|
|
bail:
|
|
if (!status && OCFS2_I(inode)->ip_clusters == 0)
|
|
status = ocfs2_try_remove_refcount_tree(inode, di_bh);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* extend file allocation only here.
|
|
* we'll update all the disk stuff, and oip->alloc_size
|
|
*
|
|
* expect stuff to be locked, a transaction started and enough data /
|
|
* metadata reservations in the contexts.
|
|
*
|
|
* Will return -EAGAIN, and a reason if a restart is needed.
|
|
* If passed in, *reason will always be set, even in error.
|
|
*/
|
|
int ocfs2_add_inode_data(struct ocfs2_super *osb,
|
|
struct inode *inode,
|
|
u32 *logical_offset,
|
|
u32 clusters_to_add,
|
|
int mark_unwritten,
|
|
struct buffer_head *fe_bh,
|
|
handle_t *handle,
|
|
struct ocfs2_alloc_context *data_ac,
|
|
struct ocfs2_alloc_context *meta_ac,
|
|
enum ocfs2_alloc_restarted *reason_ret)
|
|
{
|
|
int ret;
|
|
struct ocfs2_extent_tree et;
|
|
|
|
ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh);
|
|
ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset,
|
|
clusters_to_add, mark_unwritten,
|
|
data_ac, meta_ac, reason_ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
|
|
u32 clusters_to_add, int mark_unwritten)
|
|
{
|
|
int status = 0;
|
|
int restart_func = 0;
|
|
int credits;
|
|
u32 prev_clusters;
|
|
struct buffer_head *bh = NULL;
|
|
struct ocfs2_dinode *fe = NULL;
|
|
handle_t *handle = NULL;
|
|
struct ocfs2_alloc_context *data_ac = NULL;
|
|
struct ocfs2_alloc_context *meta_ac = NULL;
|
|
enum ocfs2_alloc_restarted why = RESTART_NONE;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_extent_tree et;
|
|
int did_quota = 0;
|
|
|
|
/*
|
|
* Unwritten extent only exists for file systems which
|
|
* support holes.
|
|
*/
|
|
BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
|
|
|
|
status = ocfs2_read_inode_block(inode, &bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
fe = (struct ocfs2_dinode *) bh->b_data;
|
|
|
|
restart_all:
|
|
BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
|
|
|
|
ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh);
|
|
status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
|
|
&data_ac, &meta_ac);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list);
|
|
handle = ocfs2_start_trans(osb, credits);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
restarted_transaction:
|
|
trace_ocfs2_extend_allocation(
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)i_size_read(inode),
|
|
le32_to_cpu(fe->i_clusters), clusters_to_add,
|
|
why, restart_func);
|
|
|
|
status = dquot_alloc_space_nodirty(inode,
|
|
ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
|
|
if (status)
|
|
goto leave;
|
|
did_quota = 1;
|
|
|
|
/* reserve a write to the file entry early on - that we if we
|
|
* run out of credits in the allocation path, we can still
|
|
* update i_size. */
|
|
status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
prev_clusters = OCFS2_I(inode)->ip_clusters;
|
|
|
|
status = ocfs2_add_inode_data(osb,
|
|
inode,
|
|
&logical_start,
|
|
clusters_to_add,
|
|
mark_unwritten,
|
|
bh,
|
|
handle,
|
|
data_ac,
|
|
meta_ac,
|
|
&why);
|
|
if ((status < 0) && (status != -EAGAIN)) {
|
|
if (status != -ENOSPC)
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
ocfs2_update_inode_fsync_trans(handle, inode, 1);
|
|
ocfs2_journal_dirty(handle, bh);
|
|
|
|
spin_lock(&OCFS2_I(inode)->ip_lock);
|
|
clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
|
|
spin_unlock(&OCFS2_I(inode)->ip_lock);
|
|
/* Release unused quota reservation */
|
|
dquot_free_space(inode,
|
|
ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
|
|
did_quota = 0;
|
|
|
|
if (why != RESTART_NONE && clusters_to_add) {
|
|
if (why == RESTART_META) {
|
|
restart_func = 1;
|
|
status = 0;
|
|
} else {
|
|
BUG_ON(why != RESTART_TRANS);
|
|
|
|
status = ocfs2_allocate_extend_trans(handle, 1);
|
|
if (status < 0) {
|
|
/* handle still has to be committed at
|
|
* this point. */
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
goto restarted_transaction;
|
|
}
|
|
}
|
|
|
|
trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno,
|
|
le32_to_cpu(fe->i_clusters),
|
|
(unsigned long long)le64_to_cpu(fe->i_size),
|
|
OCFS2_I(inode)->ip_clusters,
|
|
(unsigned long long)i_size_read(inode));
|
|
|
|
leave:
|
|
if (status < 0 && did_quota)
|
|
dquot_free_space(inode,
|
|
ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
|
|
if (handle) {
|
|
ocfs2_commit_trans(osb, handle);
|
|
handle = NULL;
|
|
}
|
|
if (data_ac) {
|
|
ocfs2_free_alloc_context(data_ac);
|
|
data_ac = NULL;
|
|
}
|
|
if (meta_ac) {
|
|
ocfs2_free_alloc_context(meta_ac);
|
|
meta_ac = NULL;
|
|
}
|
|
if ((!status) && restart_func) {
|
|
restart_func = 0;
|
|
goto restart_all;
|
|
}
|
|
brelse(bh);
|
|
bh = NULL;
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
|
|
u32 clusters_to_add, int mark_unwritten)
|
|
{
|
|
return __ocfs2_extend_allocation(inode, logical_start,
|
|
clusters_to_add, mark_unwritten);
|
|
}
|
|
|
|
/*
|
|
* While a write will already be ordering the data, a truncate will not.
|
|
* Thus, we need to explicitly order the zeroed pages.
|
|
*/
|
|
static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode,
|
|
struct buffer_head *di_bh)
|
|
{
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
handle_t *handle = NULL;
|
|
int ret = 0;
|
|
|
|
if (!ocfs2_should_order_data(inode))
|
|
goto out;
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
ret = -ENOMEM;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_jbd2_file_inode(handle, inode);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
ocfs2_update_inode_fsync_trans(handle, inode, 1);
|
|
|
|
out:
|
|
if (ret) {
|
|
if (!IS_ERR(handle))
|
|
ocfs2_commit_trans(osb, handle);
|
|
handle = ERR_PTR(ret);
|
|
}
|
|
return handle;
|
|
}
|
|
|
|
/* Some parts of this taken from generic_cont_expand, which turned out
|
|
* to be too fragile to do exactly what we need without us having to
|
|
* worry about recursive locking in ->write_begin() and ->write_end(). */
|
|
static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from,
|
|
u64 abs_to, struct buffer_head *di_bh)
|
|
{
|
|
struct address_space *mapping = inode->i_mapping;
|
|
struct page *page;
|
|
unsigned long index = abs_from >> PAGE_CACHE_SHIFT;
|
|
handle_t *handle;
|
|
int ret = 0;
|
|
unsigned zero_from, zero_to, block_start, block_end;
|
|
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
|
|
|
|
BUG_ON(abs_from >= abs_to);
|
|
BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT));
|
|
BUG_ON(abs_from & (inode->i_blkbits - 1));
|
|
|
|
handle = ocfs2_zero_start_ordered_transaction(inode, di_bh);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
goto out;
|
|
}
|
|
|
|
page = find_or_create_page(mapping, index, GFP_NOFS);
|
|
if (!page) {
|
|
ret = -ENOMEM;
|
|
mlog_errno(ret);
|
|
goto out_commit_trans;
|
|
}
|
|
|
|
/* Get the offsets within the page that we want to zero */
|
|
zero_from = abs_from & (PAGE_CACHE_SIZE - 1);
|
|
zero_to = abs_to & (PAGE_CACHE_SIZE - 1);
|
|
if (!zero_to)
|
|
zero_to = PAGE_CACHE_SIZE;
|
|
|
|
trace_ocfs2_write_zero_page(
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)abs_from,
|
|
(unsigned long long)abs_to,
|
|
index, zero_from, zero_to);
|
|
|
|
/* We know that zero_from is block aligned */
|
|
for (block_start = zero_from; block_start < zero_to;
|
|
block_start = block_end) {
|
|
block_end = block_start + (1 << inode->i_blkbits);
|
|
|
|
/*
|
|
* block_start is block-aligned. Bump it by one to force
|
|
* __block_write_begin and block_commit_write to zero the
|
|
* whole block.
|
|
*/
|
|
ret = __block_write_begin(page, block_start + 1, 0,
|
|
ocfs2_get_block);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_unlock;
|
|
}
|
|
|
|
|
|
/* must not update i_size! */
|
|
ret = block_commit_write(page, block_start + 1,
|
|
block_start + 1);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
else
|
|
ret = 0;
|
|
}
|
|
|
|
/*
|
|
* fs-writeback will release the dirty pages without page lock
|
|
* whose offset are over inode size, the release happens at
|
|
* block_write_full_page().
|
|
*/
|
|
i_size_write(inode, abs_to);
|
|
inode->i_blocks = ocfs2_inode_sector_count(inode);
|
|
di->i_size = cpu_to_le64((u64)i_size_read(inode));
|
|
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
|
di->i_mtime = di->i_ctime = cpu_to_le64(inode->i_mtime.tv_sec);
|
|
di->i_ctime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
|
|
di->i_mtime_nsec = di->i_ctime_nsec;
|
|
if (handle) {
|
|
ocfs2_journal_dirty(handle, di_bh);
|
|
ocfs2_update_inode_fsync_trans(handle, inode, 1);
|
|
}
|
|
|
|
out_unlock:
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
out_commit_trans:
|
|
if (handle)
|
|
ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Find the next range to zero. We do this in terms of bytes because
|
|
* that's what ocfs2_zero_extend() wants, and it is dealing with the
|
|
* pagecache. We may return multiple extents.
|
|
*
|
|
* zero_start and zero_end are ocfs2_zero_extend()s current idea of what
|
|
* needs to be zeroed. range_start and range_end return the next zeroing
|
|
* range. A subsequent call should pass the previous range_end as its
|
|
* zero_start. If range_end is 0, there's nothing to do.
|
|
*
|
|
* Unwritten extents are skipped over. Refcounted extents are CoWd.
|
|
*/
|
|
static int ocfs2_zero_extend_get_range(struct inode *inode,
|
|
struct buffer_head *di_bh,
|
|
u64 zero_start, u64 zero_end,
|
|
u64 *range_start, u64 *range_end)
|
|
{
|
|
int rc = 0, needs_cow = 0;
|
|
u32 p_cpos, zero_clusters = 0;
|
|
u32 zero_cpos =
|
|
zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
|
|
u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end);
|
|
unsigned int num_clusters = 0;
|
|
unsigned int ext_flags = 0;
|
|
|
|
while (zero_cpos < last_cpos) {
|
|
rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos,
|
|
&num_clusters, &ext_flags);
|
|
if (rc) {
|
|
mlog_errno(rc);
|
|
goto out;
|
|
}
|
|
|
|
if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) {
|
|
zero_clusters = num_clusters;
|
|
if (ext_flags & OCFS2_EXT_REFCOUNTED)
|
|
needs_cow = 1;
|
|
break;
|
|
}
|
|
|
|
zero_cpos += num_clusters;
|
|
}
|
|
if (!zero_clusters) {
|
|
*range_end = 0;
|
|
goto out;
|
|
}
|
|
|
|
while ((zero_cpos + zero_clusters) < last_cpos) {
|
|
rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters,
|
|
&p_cpos, &num_clusters,
|
|
&ext_flags);
|
|
if (rc) {
|
|
mlog_errno(rc);
|
|
goto out;
|
|
}
|
|
|
|
if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN))
|
|
break;
|
|
if (ext_flags & OCFS2_EXT_REFCOUNTED)
|
|
needs_cow = 1;
|
|
zero_clusters += num_clusters;
|
|
}
|
|
if ((zero_cpos + zero_clusters) > last_cpos)
|
|
zero_clusters = last_cpos - zero_cpos;
|
|
|
|
if (needs_cow) {
|
|
rc = ocfs2_refcount_cow(inode, di_bh, zero_cpos,
|
|
zero_clusters, UINT_MAX);
|
|
if (rc) {
|
|
mlog_errno(rc);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
*range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos);
|
|
*range_end = ocfs2_clusters_to_bytes(inode->i_sb,
|
|
zero_cpos + zero_clusters);
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Zero one range returned from ocfs2_zero_extend_get_range(). The caller
|
|
* has made sure that the entire range needs zeroing.
|
|
*/
|
|
static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start,
|
|
u64 range_end, struct buffer_head *di_bh)
|
|
{
|
|
int rc = 0;
|
|
u64 next_pos;
|
|
u64 zero_pos = range_start;
|
|
|
|
trace_ocfs2_zero_extend_range(
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)range_start,
|
|
(unsigned long long)range_end);
|
|
BUG_ON(range_start >= range_end);
|
|
|
|
while (zero_pos < range_end) {
|
|
next_pos = (zero_pos & PAGE_CACHE_MASK) + PAGE_CACHE_SIZE;
|
|
if (next_pos > range_end)
|
|
next_pos = range_end;
|
|
rc = ocfs2_write_zero_page(inode, zero_pos, next_pos, di_bh);
|
|
if (rc < 0) {
|
|
mlog_errno(rc);
|
|
break;
|
|
}
|
|
zero_pos = next_pos;
|
|
|
|
/*
|
|
* Very large extends have the potential to lock up
|
|
* the cpu for extended periods of time.
|
|
*/
|
|
cond_resched();
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh,
|
|
loff_t zero_to_size)
|
|
{
|
|
int ret = 0;
|
|
u64 zero_start, range_start = 0, range_end = 0;
|
|
struct super_block *sb = inode->i_sb;
|
|
|
|
zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
|
|
trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)zero_start,
|
|
(unsigned long long)i_size_read(inode));
|
|
while (zero_start < zero_to_size) {
|
|
ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start,
|
|
zero_to_size,
|
|
&range_start,
|
|
&range_end);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
break;
|
|
}
|
|
if (!range_end)
|
|
break;
|
|
/* Trim the ends */
|
|
if (range_start < zero_start)
|
|
range_start = zero_start;
|
|
if (range_end > zero_to_size)
|
|
range_end = zero_to_size;
|
|
|
|
ret = ocfs2_zero_extend_range(inode, range_start,
|
|
range_end, di_bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
break;
|
|
}
|
|
zero_start = range_end;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh,
|
|
u64 new_i_size, u64 zero_to)
|
|
{
|
|
int ret;
|
|
u32 clusters_to_add;
|
|
struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
|
/*
|
|
* Only quota files call this without a bh, and they can't be
|
|
* refcounted.
|
|
*/
|
|
BUG_ON(!di_bh && (oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
|
|
BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE));
|
|
|
|
clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
|
|
if (clusters_to_add < oi->ip_clusters)
|
|
clusters_to_add = 0;
|
|
else
|
|
clusters_to_add -= oi->ip_clusters;
|
|
|
|
if (clusters_to_add) {
|
|
ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
|
|
clusters_to_add, 0);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Call this even if we don't add any clusters to the tree. We
|
|
* still need to zero the area between the old i_size and the
|
|
* new i_size.
|
|
*/
|
|
ret = ocfs2_zero_extend(inode, di_bh, zero_to);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_extend_file(struct inode *inode,
|
|
struct buffer_head *di_bh,
|
|
u64 new_i_size)
|
|
{
|
|
int ret = 0;
|
|
struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
|
BUG_ON(!di_bh);
|
|
|
|
/* setattr sometimes calls us like this. */
|
|
if (new_i_size == 0)
|
|
goto out;
|
|
|
|
if (i_size_read(inode) == new_i_size)
|
|
goto out;
|
|
BUG_ON(new_i_size < i_size_read(inode));
|
|
|
|
/*
|
|
* The alloc sem blocks people in read/write from reading our
|
|
* allocation until we're done changing it. We depend on
|
|
* i_mutex to block other extend/truncate calls while we're
|
|
* here. We even have to hold it for sparse files because there
|
|
* might be some tail zeroing.
|
|
*/
|
|
down_write(&oi->ip_alloc_sem);
|
|
|
|
if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
/*
|
|
* We can optimize small extends by keeping the inodes
|
|
* inline data.
|
|
*/
|
|
if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
|
|
up_write(&oi->ip_alloc_sem);
|
|
goto out_update_size;
|
|
}
|
|
|
|
ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
|
|
if (ret) {
|
|
up_write(&oi->ip_alloc_sem);
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
|
|
ret = ocfs2_zero_extend(inode, di_bh, new_i_size);
|
|
else
|
|
ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size,
|
|
new_i_size);
|
|
|
|
up_write(&oi->ip_alloc_sem);
|
|
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
out_update_size:
|
|
ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
int status = 0, size_change;
|
|
struct inode *inode = dentry->d_inode;
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ocfs2_super *osb = OCFS2_SB(sb);
|
|
struct buffer_head *bh = NULL;
|
|
handle_t *handle = NULL;
|
|
struct dquot *transfer_to[MAXQUOTAS] = { };
|
|
int qtype;
|
|
|
|
trace_ocfs2_setattr(inode, dentry,
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
dentry->d_name.len, dentry->d_name.name,
|
|
attr->ia_valid, attr->ia_mode,
|
|
from_kuid(&init_user_ns, attr->ia_uid),
|
|
from_kgid(&init_user_ns, attr->ia_gid));
|
|
|
|
/* ensuring we don't even attempt to truncate a symlink */
|
|
if (S_ISLNK(inode->i_mode))
|
|
attr->ia_valid &= ~ATTR_SIZE;
|
|
|
|
#define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
|
|
| ATTR_GID | ATTR_UID | ATTR_MODE)
|
|
if (!(attr->ia_valid & OCFS2_VALID_ATTRS))
|
|
return 0;
|
|
|
|
status = inode_change_ok(inode, attr);
|
|
if (status)
|
|
return status;
|
|
|
|
if (is_quota_modification(inode, attr))
|
|
dquot_initialize(inode);
|
|
size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
|
|
if (size_change) {
|
|
status = ocfs2_rw_lock(inode, 1);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
status = ocfs2_inode_lock(inode, &bh, 1);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
goto bail_unlock_rw;
|
|
}
|
|
|
|
if (size_change) {
|
|
status = inode_newsize_ok(inode, attr->ia_size);
|
|
if (status)
|
|
goto bail_unlock;
|
|
|
|
inode_dio_wait(inode);
|
|
|
|
if (i_size_read(inode) >= attr->ia_size) {
|
|
if (ocfs2_should_order_data(inode)) {
|
|
status = ocfs2_begin_ordered_truncate(inode,
|
|
attr->ia_size);
|
|
if (status)
|
|
goto bail_unlock;
|
|
}
|
|
status = ocfs2_truncate_file(inode, bh, attr->ia_size);
|
|
} else
|
|
status = ocfs2_extend_file(inode, bh, attr->ia_size);
|
|
if (status < 0) {
|
|
if (status != -ENOSPC)
|
|
mlog_errno(status);
|
|
status = -ENOSPC;
|
|
goto bail_unlock;
|
|
}
|
|
}
|
|
|
|
if ((attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||
|
|
(attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
|
|
/*
|
|
* Gather pointers to quota structures so that allocation /
|
|
* freeing of quota structures happens here and not inside
|
|
* dquot_transfer() where we have problems with lock ordering
|
|
*/
|
|
if (attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)
|
|
&& OCFS2_HAS_RO_COMPAT_FEATURE(sb,
|
|
OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
|
|
transfer_to[USRQUOTA] = dqget(sb, make_kqid_uid(attr->ia_uid));
|
|
if (!transfer_to[USRQUOTA]) {
|
|
status = -ESRCH;
|
|
goto bail_unlock;
|
|
}
|
|
}
|
|
if (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid)
|
|
&& OCFS2_HAS_RO_COMPAT_FEATURE(sb,
|
|
OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
|
|
transfer_to[GRPQUOTA] = dqget(sb, make_kqid_gid(attr->ia_gid));
|
|
if (!transfer_to[GRPQUOTA]) {
|
|
status = -ESRCH;
|
|
goto bail_unlock;
|
|
}
|
|
}
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS +
|
|
2 * ocfs2_quota_trans_credits(sb));
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto bail_unlock;
|
|
}
|
|
status = __dquot_transfer(inode, transfer_to);
|
|
if (status < 0)
|
|
goto bail_commit;
|
|
} else {
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto bail_unlock;
|
|
}
|
|
}
|
|
|
|
setattr_copy(inode, attr);
|
|
mark_inode_dirty(inode);
|
|
|
|
status = ocfs2_mark_inode_dirty(handle, inode, bh);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
bail_commit:
|
|
ocfs2_commit_trans(osb, handle);
|
|
bail_unlock:
|
|
ocfs2_inode_unlock(inode, 1);
|
|
bail_unlock_rw:
|
|
if (size_change)
|
|
ocfs2_rw_unlock(inode, 1);
|
|
bail:
|
|
brelse(bh);
|
|
|
|
/* Release quota pointers in case we acquired them */
|
|
for (qtype = 0; qtype < OCFS2_MAXQUOTAS; qtype++)
|
|
dqput(transfer_to[qtype]);
|
|
|
|
if (!status && attr->ia_valid & ATTR_MODE) {
|
|
status = posix_acl_chmod(inode, inode->i_mode);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_getattr(struct vfsmount *mnt,
|
|
struct dentry *dentry,
|
|
struct kstat *stat)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct super_block *sb = dentry->d_inode->i_sb;
|
|
struct ocfs2_super *osb = sb->s_fs_info;
|
|
int err;
|
|
|
|
err = ocfs2_inode_revalidate(dentry);
|
|
if (err) {
|
|
if (err != -ENOENT)
|
|
mlog_errno(err);
|
|
goto bail;
|
|
}
|
|
|
|
generic_fillattr(inode, stat);
|
|
|
|
/* We set the blksize from the cluster size for performance */
|
|
stat->blksize = osb->s_clustersize;
|
|
|
|
bail:
|
|
return err;
|
|
}
|
|
|
|
int ocfs2_permission(struct inode *inode, int mask)
|
|
{
|
|
int ret;
|
|
|
|
if (mask & MAY_NOT_BLOCK)
|
|
return -ECHILD;
|
|
|
|
ret = ocfs2_inode_lock(inode, NULL, 0);
|
|
if (ret) {
|
|
if (ret != -ENOENT)
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = generic_permission(inode, mask);
|
|
|
|
ocfs2_inode_unlock(inode, 0);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int __ocfs2_write_remove_suid(struct inode *inode,
|
|
struct buffer_head *bh)
|
|
{
|
|
int ret;
|
|
handle_t *handle;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_dinode *di;
|
|
|
|
trace_ocfs2_write_remove_suid(
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
inode->i_mode);
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_trans;
|
|
}
|
|
|
|
inode->i_mode &= ~S_ISUID;
|
|
if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
|
|
inode->i_mode &= ~S_ISGID;
|
|
|
|
di = (struct ocfs2_dinode *) bh->b_data;
|
|
di->i_mode = cpu_to_le16(inode->i_mode);
|
|
ocfs2_update_inode_fsync_trans(handle, inode, 0);
|
|
|
|
ocfs2_journal_dirty(handle, bh);
|
|
|
|
out_trans:
|
|
ocfs2_commit_trans(osb, handle);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Will look for holes and unwritten extents in the range starting at
|
|
* pos for count bytes (inclusive).
|
|
*/
|
|
static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
|
|
size_t count)
|
|
{
|
|
int ret = 0;
|
|
unsigned int extent_flags;
|
|
u32 cpos, clusters, extent_len, phys_cpos;
|
|
struct super_block *sb = inode->i_sb;
|
|
|
|
cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
|
|
clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
|
|
|
|
while (clusters) {
|
|
ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
|
|
&extent_flags);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
|
|
if (extent_len > clusters)
|
|
extent_len = clusters;
|
|
|
|
clusters -= extent_len;
|
|
cpos += extent_len;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_write_remove_suid(struct inode *inode)
|
|
{
|
|
int ret;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
ret = ocfs2_read_inode_block(inode, &bh);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = __ocfs2_write_remove_suid(inode, bh);
|
|
out:
|
|
brelse(bh);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Allocate enough extents to cover the region starting at byte offset
|
|
* start for len bytes. Existing extents are skipped, any extents
|
|
* added are marked as "unwritten".
|
|
*/
|
|
static int ocfs2_allocate_unwritten_extents(struct inode *inode,
|
|
u64 start, u64 len)
|
|
{
|
|
int ret;
|
|
u32 cpos, phys_cpos, clusters, alloc_size;
|
|
u64 end = start + len;
|
|
struct buffer_head *di_bh = NULL;
|
|
|
|
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
ret = ocfs2_read_inode_block(inode, &di_bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Nothing to do if the requested reservation range
|
|
* fits within the inode.
|
|
*/
|
|
if (ocfs2_size_fits_inline_data(di_bh, end))
|
|
goto out;
|
|
|
|
ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We consider both start and len to be inclusive.
|
|
*/
|
|
cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
|
|
clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
|
|
clusters -= cpos;
|
|
|
|
while (clusters) {
|
|
ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
|
|
&alloc_size, NULL);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Hole or existing extent len can be arbitrary, so
|
|
* cap it to our own allocation request.
|
|
*/
|
|
if (alloc_size > clusters)
|
|
alloc_size = clusters;
|
|
|
|
if (phys_cpos) {
|
|
/*
|
|
* We already have an allocation at this
|
|
* region so we can safely skip it.
|
|
*/
|
|
goto next;
|
|
}
|
|
|
|
ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
|
|
if (ret) {
|
|
if (ret != -ENOSPC)
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
next:
|
|
cpos += alloc_size;
|
|
clusters -= alloc_size;
|
|
}
|
|
|
|
ret = 0;
|
|
out:
|
|
|
|
brelse(di_bh);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Truncate a byte range, avoiding pages within partial clusters. This
|
|
* preserves those pages for the zeroing code to write to.
|
|
*/
|
|
static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
|
|
u64 byte_len)
|
|
{
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
loff_t start, end;
|
|
struct address_space *mapping = inode->i_mapping;
|
|
|
|
start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
|
|
end = byte_start + byte_len;
|
|
end = end & ~(osb->s_clustersize - 1);
|
|
|
|
if (start < end) {
|
|
unmap_mapping_range(mapping, start, end - start, 0);
|
|
truncate_inode_pages_range(mapping, start, end - 1);
|
|
}
|
|
}
|
|
|
|
static int ocfs2_zero_partial_clusters(struct inode *inode,
|
|
u64 start, u64 len)
|
|
{
|
|
int ret = 0;
|
|
u64 tmpend, end = start + len;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
unsigned int csize = osb->s_clustersize;
|
|
handle_t *handle;
|
|
|
|
/*
|
|
* The "start" and "end" values are NOT necessarily part of
|
|
* the range whose allocation is being deleted. Rather, this
|
|
* is what the user passed in with the request. We must zero
|
|
* partial clusters here. There's no need to worry about
|
|
* physical allocation - the zeroing code knows to skip holes.
|
|
*/
|
|
trace_ocfs2_zero_partial_clusters(
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)start, (unsigned long long)end);
|
|
|
|
/*
|
|
* If both edges are on a cluster boundary then there's no
|
|
* zeroing required as the region is part of the allocation to
|
|
* be truncated.
|
|
*/
|
|
if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
|
|
goto out;
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* We want to get the byte offset of the end of the 1st cluster.
|
|
*/
|
|
tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
|
|
if (tmpend > end)
|
|
tmpend = end;
|
|
|
|
trace_ocfs2_zero_partial_clusters_range1((unsigned long long)start,
|
|
(unsigned long long)tmpend);
|
|
|
|
ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
|
|
if (tmpend < end) {
|
|
/*
|
|
* This may make start and end equal, but the zeroing
|
|
* code will skip any work in that case so there's no
|
|
* need to catch it up here.
|
|
*/
|
|
start = end & ~(osb->s_clustersize - 1);
|
|
|
|
trace_ocfs2_zero_partial_clusters_range2(
|
|
(unsigned long long)start, (unsigned long long)end);
|
|
|
|
ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
}
|
|
ocfs2_update_inode_fsync_trans(handle, inode, 1);
|
|
|
|
ocfs2_commit_trans(osb, handle);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos)
|
|
{
|
|
int i;
|
|
struct ocfs2_extent_rec *rec = NULL;
|
|
|
|
for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
|
|
|
|
rec = &el->l_recs[i];
|
|
|
|
if (le32_to_cpu(rec->e_cpos) < pos)
|
|
break;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
/*
|
|
* Helper to calculate the punching pos and length in one run, we handle the
|
|
* following three cases in order:
|
|
*
|
|
* - remove the entire record
|
|
* - remove a partial record
|
|
* - no record needs to be removed (hole-punching completed)
|
|
*/
|
|
static void ocfs2_calc_trunc_pos(struct inode *inode,
|
|
struct ocfs2_extent_list *el,
|
|
struct ocfs2_extent_rec *rec,
|
|
u32 trunc_start, u32 *trunc_cpos,
|
|
u32 *trunc_len, u32 *trunc_end,
|
|
u64 *blkno, int *done)
|
|
{
|
|
int ret = 0;
|
|
u32 coff, range;
|
|
|
|
range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
|
|
|
|
if (le32_to_cpu(rec->e_cpos) >= trunc_start) {
|
|
/*
|
|
* remove an entire extent record.
|
|
*/
|
|
*trunc_cpos = le32_to_cpu(rec->e_cpos);
|
|
/*
|
|
* Skip holes if any.
|
|
*/
|
|
if (range < *trunc_end)
|
|
*trunc_end = range;
|
|
*trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos);
|
|
*blkno = le64_to_cpu(rec->e_blkno);
|
|
*trunc_end = le32_to_cpu(rec->e_cpos);
|
|
} else if (range > trunc_start) {
|
|
/*
|
|
* remove a partial extent record, which means we're
|
|
* removing the last extent record.
|
|
*/
|
|
*trunc_cpos = trunc_start;
|
|
/*
|
|
* skip hole if any.
|
|
*/
|
|
if (range < *trunc_end)
|
|
*trunc_end = range;
|
|
*trunc_len = *trunc_end - trunc_start;
|
|
coff = trunc_start - le32_to_cpu(rec->e_cpos);
|
|
*blkno = le64_to_cpu(rec->e_blkno) +
|
|
ocfs2_clusters_to_blocks(inode->i_sb, coff);
|
|
*trunc_end = trunc_start;
|
|
} else {
|
|
/*
|
|
* It may have two following possibilities:
|
|
*
|
|
* - last record has been removed
|
|
* - trunc_start was within a hole
|
|
*
|
|
* both two cases mean the completion of hole punching.
|
|
*/
|
|
ret = 1;
|
|
}
|
|
|
|
*done = ret;
|
|
}
|
|
|
|
static int ocfs2_remove_inode_range(struct inode *inode,
|
|
struct buffer_head *di_bh, u64 byte_start,
|
|
u64 byte_len)
|
|
{
|
|
int ret = 0, flags = 0, done = 0, i;
|
|
u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos;
|
|
u32 cluster_in_el;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_cached_dealloc_ctxt dealloc;
|
|
struct address_space *mapping = inode->i_mapping;
|
|
struct ocfs2_extent_tree et;
|
|
struct ocfs2_path *path = NULL;
|
|
struct ocfs2_extent_list *el = NULL;
|
|
struct ocfs2_extent_rec *rec = NULL;
|
|
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
|
|
u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc);
|
|
|
|
ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
|
|
ocfs2_init_dealloc_ctxt(&dealloc);
|
|
|
|
trace_ocfs2_remove_inode_range(
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)byte_start,
|
|
(unsigned long long)byte_len);
|
|
|
|
if (byte_len == 0)
|
|
return 0;
|
|
|
|
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
|
|
byte_start + byte_len, 0);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
/*
|
|
* There's no need to get fancy with the page cache
|
|
* truncate of an inline-data inode. We're talking
|
|
* about less than a page here, which will be cached
|
|
* in the dinode buffer anyway.
|
|
*/
|
|
unmap_mapping_range(mapping, 0, 0, 0);
|
|
truncate_inode_pages(mapping, 0);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* For reflinks, we may need to CoW 2 clusters which might be
|
|
* partially zero'd later, if hole's start and end offset were
|
|
* within one cluster(means is not exactly aligned to clustersize).
|
|
*/
|
|
|
|
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) {
|
|
|
|
ret = ocfs2_cow_file_pos(inode, di_bh, byte_start);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
|
|
trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits;
|
|
cluster_in_el = trunc_end;
|
|
|
|
ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
path = ocfs2_new_path_from_et(&et);
|
|
if (!path) {
|
|
ret = -ENOMEM;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
while (trunc_end > trunc_start) {
|
|
|
|
ret = ocfs2_find_path(INODE_CACHE(inode), path,
|
|
cluster_in_el);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
el = path_leaf_el(path);
|
|
|
|
i = ocfs2_find_rec(el, trunc_end);
|
|
/*
|
|
* Need to go to previous extent block.
|
|
*/
|
|
if (i < 0) {
|
|
if (path->p_tree_depth == 0)
|
|
break;
|
|
|
|
ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb,
|
|
path,
|
|
&cluster_in_el);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* We've reached the leftmost extent block,
|
|
* it's safe to leave.
|
|
*/
|
|
if (cluster_in_el == 0)
|
|
break;
|
|
|
|
/*
|
|
* The 'pos' searched for previous extent block is
|
|
* always one cluster less than actual trunc_end.
|
|
*/
|
|
trunc_end = cluster_in_el + 1;
|
|
|
|
ocfs2_reinit_path(path, 1);
|
|
|
|
continue;
|
|
|
|
} else
|
|
rec = &el->l_recs[i];
|
|
|
|
ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos,
|
|
&trunc_len, &trunc_end, &blkno, &done);
|
|
if (done)
|
|
break;
|
|
|
|
flags = rec->e_flags;
|
|
phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
|
|
|
|
ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos,
|
|
phys_cpos, trunc_len, flags,
|
|
&dealloc, refcount_loc, false);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
cluster_in_el = trunc_end;
|
|
|
|
ocfs2_reinit_path(path, 1);
|
|
}
|
|
|
|
ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
|
|
|
|
out:
|
|
ocfs2_free_path(path);
|
|
ocfs2_schedule_truncate_log_flush(osb, 1);
|
|
ocfs2_run_deallocs(osb, &dealloc);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Parts of this function taken from xfs_change_file_space()
|
|
*/
|
|
static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
|
|
loff_t f_pos, unsigned int cmd,
|
|
struct ocfs2_space_resv *sr,
|
|
int change_size)
|
|
{
|
|
int ret;
|
|
s64 llen;
|
|
loff_t size;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct buffer_head *di_bh = NULL;
|
|
handle_t *handle;
|
|
unsigned long long max_off = inode->i_sb->s_maxbytes;
|
|
|
|
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
|
|
return -EROFS;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
/*
|
|
* This prevents concurrent writes on other nodes
|
|
*/
|
|
ret = ocfs2_rw_lock(inode, 1);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_inode_lock(inode, &di_bh, 1);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out_rw_unlock;
|
|
}
|
|
|
|
if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
|
|
ret = -EPERM;
|
|
goto out_inode_unlock;
|
|
}
|
|
|
|
switch (sr->l_whence) {
|
|
case 0: /*SEEK_SET*/
|
|
break;
|
|
case 1: /*SEEK_CUR*/
|
|
sr->l_start += f_pos;
|
|
break;
|
|
case 2: /*SEEK_END*/
|
|
sr->l_start += i_size_read(inode);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto out_inode_unlock;
|
|
}
|
|
sr->l_whence = 0;
|
|
|
|
llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
|
|
|
|
if (sr->l_start < 0
|
|
|| sr->l_start > max_off
|
|
|| (sr->l_start + llen) < 0
|
|
|| (sr->l_start + llen) > max_off) {
|
|
ret = -EINVAL;
|
|
goto out_inode_unlock;
|
|
}
|
|
size = sr->l_start + sr->l_len;
|
|
|
|
if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64 ||
|
|
cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) {
|
|
if (sr->l_len <= 0) {
|
|
ret = -EINVAL;
|
|
goto out_inode_unlock;
|
|
}
|
|
}
|
|
|
|
if (file && should_remove_suid(file->f_path.dentry)) {
|
|
ret = __ocfs2_write_remove_suid(inode, di_bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out_inode_unlock;
|
|
}
|
|
}
|
|
|
|
down_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
switch (cmd) {
|
|
case OCFS2_IOC_RESVSP:
|
|
case OCFS2_IOC_RESVSP64:
|
|
/*
|
|
* This takes unsigned offsets, but the signed ones we
|
|
* pass have been checked against overflow above.
|
|
*/
|
|
ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
|
|
sr->l_len);
|
|
break;
|
|
case OCFS2_IOC_UNRESVSP:
|
|
case OCFS2_IOC_UNRESVSP64:
|
|
ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
|
|
sr->l_len);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
up_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out_inode_unlock;
|
|
}
|
|
|
|
/*
|
|
* We update c/mtime for these changes
|
|
*/
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
mlog_errno(ret);
|
|
goto out_inode_unlock;
|
|
}
|
|
|
|
if (change_size && i_size_read(inode) < size)
|
|
i_size_write(inode, size);
|
|
|
|
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
|
|
ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
|
|
if (file && (file->f_flags & O_SYNC))
|
|
handle->h_sync = 1;
|
|
|
|
ocfs2_commit_trans(osb, handle);
|
|
|
|
out_inode_unlock:
|
|
brelse(di_bh);
|
|
ocfs2_inode_unlock(inode, 1);
|
|
out_rw_unlock:
|
|
ocfs2_rw_unlock(inode, 1);
|
|
|
|
out:
|
|
mutex_unlock(&inode->i_mutex);
|
|
return ret;
|
|
}
|
|
|
|
int ocfs2_change_file_space(struct file *file, unsigned int cmd,
|
|
struct ocfs2_space_resv *sr)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
int ret;
|
|
|
|
if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
|
|
!ocfs2_writes_unwritten_extents(osb))
|
|
return -ENOTTY;
|
|
else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
|
|
!ocfs2_sparse_alloc(osb))
|
|
return -ENOTTY;
|
|
|
|
if (!S_ISREG(inode->i_mode))
|
|
return -EINVAL;
|
|
|
|
if (!(file->f_mode & FMODE_WRITE))
|
|
return -EBADF;
|
|
|
|
ret = mnt_want_write_file(file);
|
|
if (ret)
|
|
return ret;
|
|
ret = __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
|
|
mnt_drop_write_file(file);
|
|
return ret;
|
|
}
|
|
|
|
static long ocfs2_fallocate(struct file *file, int mode, loff_t offset,
|
|
loff_t len)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_space_resv sr;
|
|
int change_size = 1;
|
|
int cmd = OCFS2_IOC_RESVSP64;
|
|
|
|
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
|
|
return -EOPNOTSUPP;
|
|
if (!ocfs2_writes_unwritten_extents(osb))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (mode & FALLOC_FL_KEEP_SIZE)
|
|
change_size = 0;
|
|
|
|
if (mode & FALLOC_FL_PUNCH_HOLE)
|
|
cmd = OCFS2_IOC_UNRESVSP64;
|
|
|
|
sr.l_whence = 0;
|
|
sr.l_start = (s64)offset;
|
|
sr.l_len = (s64)len;
|
|
|
|
return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr,
|
|
change_size);
|
|
}
|
|
|
|
int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
|
|
size_t count)
|
|
{
|
|
int ret = 0;
|
|
unsigned int extent_flags;
|
|
u32 cpos, clusters, extent_len, phys_cpos;
|
|
struct super_block *sb = inode->i_sb;
|
|
|
|
if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) ||
|
|
!(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) ||
|
|
OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
|
|
return 0;
|
|
|
|
cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
|
|
clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
|
|
|
|
while (clusters) {
|
|
ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
|
|
&extent_flags);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
|
|
if (extent_len > clusters)
|
|
extent_len = clusters;
|
|
|
|
clusters -= extent_len;
|
|
cpos += extent_len;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos)
|
|
{
|
|
int blockmask = inode->i_sb->s_blocksize - 1;
|
|
loff_t final_size = pos + count;
|
|
|
|
if ((pos & blockmask) || (final_size & blockmask))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int ocfs2_prepare_inode_for_refcount(struct inode *inode,
|
|
struct file *file,
|
|
loff_t pos, size_t count,
|
|
int *meta_level)
|
|
{
|
|
int ret;
|
|
struct buffer_head *di_bh = NULL;
|
|
u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
|
|
u32 clusters =
|
|
ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos;
|
|
|
|
ret = ocfs2_inode_lock(inode, &di_bh, 1);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
*meta_level = 1;
|
|
|
|
ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
out:
|
|
brelse(di_bh);
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_prepare_inode_for_write(struct file *file,
|
|
loff_t *ppos,
|
|
size_t count,
|
|
int appending,
|
|
int *direct_io,
|
|
int *has_refcount)
|
|
{
|
|
int ret = 0, meta_level = 0;
|
|
struct dentry *dentry = file->f_path.dentry;
|
|
struct inode *inode = dentry->d_inode;
|
|
loff_t saved_pos = 0, end;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
int full_coherency = !(osb->s_mount_opt &
|
|
OCFS2_MOUNT_COHERENCY_BUFFERED);
|
|
|
|
/*
|
|
* We start with a read level meta lock and only jump to an ex
|
|
* if we need to make modifications here.
|
|
*/
|
|
for(;;) {
|
|
ret = ocfs2_inode_lock(inode, NULL, meta_level);
|
|
if (ret < 0) {
|
|
meta_level = -1;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/* Clear suid / sgid if necessary. We do this here
|
|
* instead of later in the write path because
|
|
* remove_suid() calls ->setattr without any hint that
|
|
* we may have already done our cluster locking. Since
|
|
* ocfs2_setattr() *must* take cluster locks to
|
|
* proceed, this will lead us to recursively lock the
|
|
* inode. There's also the dinode i_size state which
|
|
* can be lost via setattr during extending writes (we
|
|
* set inode->i_size at the end of a write. */
|
|
if (should_remove_suid(dentry)) {
|
|
if (meta_level == 0) {
|
|
ocfs2_inode_unlock(inode, meta_level);
|
|
meta_level = 1;
|
|
continue;
|
|
}
|
|
|
|
ret = ocfs2_write_remove_suid(inode);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
|
|
/* work on a copy of ppos until we're sure that we won't have
|
|
* to recalculate it due to relocking. */
|
|
if (appending)
|
|
saved_pos = i_size_read(inode);
|
|
else
|
|
saved_pos = *ppos;
|
|
|
|
end = saved_pos + count;
|
|
|
|
ret = ocfs2_check_range_for_refcount(inode, saved_pos, count);
|
|
if (ret == 1) {
|
|
ocfs2_inode_unlock(inode, meta_level);
|
|
meta_level = -1;
|
|
|
|
ret = ocfs2_prepare_inode_for_refcount(inode,
|
|
file,
|
|
saved_pos,
|
|
count,
|
|
&meta_level);
|
|
if (has_refcount)
|
|
*has_refcount = 1;
|
|
if (direct_io)
|
|
*direct_io = 0;
|
|
}
|
|
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_unlock;
|
|
}
|
|
|
|
/*
|
|
* Skip the O_DIRECT checks if we don't need
|
|
* them.
|
|
*/
|
|
if (!direct_io || !(*direct_io))
|
|
break;
|
|
|
|
/*
|
|
* There's no sane way to do direct writes to an inode
|
|
* with inline data.
|
|
*/
|
|
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
*direct_io = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Allowing concurrent direct writes means
|
|
* i_size changes wouldn't be synchronized, so
|
|
* one node could wind up truncating another
|
|
* nodes writes.
|
|
*/
|
|
if (end > i_size_read(inode) && !full_coherency) {
|
|
*direct_io = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Fallback to old way if the feature bit is not set.
|
|
*/
|
|
if (end > i_size_read(inode) &&
|
|
!ocfs2_supports_append_dio(osb)) {
|
|
*direct_io = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* We don't fill holes during direct io, so
|
|
* check for them here. If any are found, the
|
|
* caller will have to retake some cluster
|
|
* locks and initiate the io as buffered.
|
|
*/
|
|
ret = ocfs2_check_range_for_holes(inode, saved_pos, count);
|
|
if (ret == 1) {
|
|
/*
|
|
* Fallback to old way if the feature bit is not set.
|
|
* Otherwise try dio first and then complete the rest
|
|
* request through buffer io.
|
|
*/
|
|
if (!ocfs2_supports_append_dio(osb))
|
|
*direct_io = 0;
|
|
ret = 0;
|
|
} else if (ret < 0)
|
|
mlog_errno(ret);
|
|
break;
|
|
}
|
|
|
|
if (appending)
|
|
*ppos = saved_pos;
|
|
|
|
out_unlock:
|
|
trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno,
|
|
saved_pos, appending, count,
|
|
direct_io, has_refcount);
|
|
|
|
if (meta_level >= 0)
|
|
ocfs2_inode_unlock(inode, meta_level);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ocfs2_file_write_iter(struct kiocb *iocb,
|
|
struct iov_iter *from)
|
|
{
|
|
int ret, direct_io, appending, rw_level, have_alloc_sem = 0;
|
|
int can_do_direct, has_refcount = 0;
|
|
ssize_t written = 0;
|
|
size_t count = iov_iter_count(from);
|
|
loff_t old_size, *ppos = &iocb->ki_pos;
|
|
u32 old_clusters;
|
|
struct file *file = iocb->ki_filp;
|
|
struct inode *inode = file_inode(file);
|
|
struct address_space *mapping = file->f_mapping;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
int full_coherency = !(osb->s_mount_opt &
|
|
OCFS2_MOUNT_COHERENCY_BUFFERED);
|
|
int unaligned_dio = 0;
|
|
|
|
trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry,
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
file->f_path.dentry->d_name.len,
|
|
file->f_path.dentry->d_name.name,
|
|
(unsigned int)from->nr_segs); /* GRRRRR */
|
|
|
|
if (count == 0)
|
|
return 0;
|
|
|
|
appending = file->f_flags & O_APPEND ? 1 : 0;
|
|
direct_io = file->f_flags & O_DIRECT ? 1 : 0;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
ocfs2_iocb_clear_sem_locked(iocb);
|
|
|
|
relock:
|
|
/* to match setattr's i_mutex -> rw_lock ordering */
|
|
if (direct_io) {
|
|
have_alloc_sem = 1;
|
|
/* communicate with ocfs2_dio_end_io */
|
|
ocfs2_iocb_set_sem_locked(iocb);
|
|
}
|
|
|
|
/*
|
|
* Concurrent O_DIRECT writes are allowed with
|
|
* mount_option "coherency=buffered".
|
|
*/
|
|
rw_level = (!direct_io || full_coherency);
|
|
|
|
ret = ocfs2_rw_lock(inode, rw_level);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_sems;
|
|
}
|
|
|
|
/*
|
|
* O_DIRECT writes with "coherency=full" need to take EX cluster
|
|
* inode_lock to guarantee coherency.
|
|
*/
|
|
if (direct_io && full_coherency) {
|
|
/*
|
|
* We need to take and drop the inode lock to force
|
|
* other nodes to drop their caches. Buffered I/O
|
|
* already does this in write_begin().
|
|
*/
|
|
ret = ocfs2_inode_lock(inode, NULL, 1);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ocfs2_inode_unlock(inode, 1);
|
|
}
|
|
|
|
can_do_direct = direct_io;
|
|
ret = ocfs2_prepare_inode_for_write(file, ppos, count, appending,
|
|
&can_do_direct, &has_refcount);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (direct_io && !is_sync_kiocb(iocb))
|
|
unaligned_dio = ocfs2_is_io_unaligned(inode, count, *ppos);
|
|
|
|
/*
|
|
* We can't complete the direct I/O as requested, fall back to
|
|
* buffered I/O.
|
|
*/
|
|
if (direct_io && !can_do_direct) {
|
|
ocfs2_rw_unlock(inode, rw_level);
|
|
|
|
have_alloc_sem = 0;
|
|
rw_level = -1;
|
|
|
|
direct_io = 0;
|
|
goto relock;
|
|
}
|
|
|
|
if (unaligned_dio) {
|
|
/*
|
|
* Wait on previous unaligned aio to complete before
|
|
* proceeding.
|
|
*/
|
|
mutex_lock(&OCFS2_I(inode)->ip_unaligned_aio);
|
|
/* Mark the iocb as needing an unlock in ocfs2_dio_end_io */
|
|
ocfs2_iocb_set_unaligned_aio(iocb);
|
|
}
|
|
|
|
/*
|
|
* To later detect whether a journal commit for sync writes is
|
|
* necessary, we sample i_size, and cluster count here.
|
|
*/
|
|
old_size = i_size_read(inode);
|
|
old_clusters = OCFS2_I(inode)->ip_clusters;
|
|
|
|
/* communicate with ocfs2_dio_end_io */
|
|
ocfs2_iocb_set_rw_locked(iocb, rw_level);
|
|
|
|
ret = generic_write_checks(file, ppos, &count,
|
|
S_ISBLK(inode->i_mode));
|
|
if (ret)
|
|
goto out_dio;
|
|
|
|
iov_iter_truncate(from, count);
|
|
if (direct_io) {
|
|
loff_t endbyte;
|
|
ssize_t written_buffered;
|
|
written = generic_file_direct_write(iocb, from, *ppos);
|
|
if (written < 0 || written == count) {
|
|
ret = written;
|
|
goto out_dio;
|
|
}
|
|
|
|
/*
|
|
* for completing the rest of the request.
|
|
*/
|
|
count -= written;
|
|
written_buffered = generic_perform_write(file, from, *ppos);
|
|
/*
|
|
* If generic_file_buffered_write() returned a synchronous error
|
|
* then we want to return the number of bytes which were
|
|
* direct-written, or the error code if that was zero. Note
|
|
* that this differs from normal direct-io semantics, which
|
|
* will return -EFOO even if some bytes were written.
|
|
*/
|
|
if (written_buffered < 0) {
|
|
ret = written_buffered;
|
|
goto out_dio;
|
|
}
|
|
|
|
/* We need to ensure that the page cache pages are written to
|
|
* disk and invalidated to preserve the expected O_DIRECT
|
|
* semantics.
|
|
*/
|
|
endbyte = *ppos + written_buffered - 1;
|
|
ret = filemap_write_and_wait_range(file->f_mapping, *ppos,
|
|
endbyte);
|
|
if (ret == 0) {
|
|
iocb->ki_pos = *ppos + written_buffered;
|
|
written += written_buffered;
|
|
invalidate_mapping_pages(mapping,
|
|
*ppos >> PAGE_CACHE_SHIFT,
|
|
endbyte >> PAGE_CACHE_SHIFT);
|
|
} else {
|
|
/*
|
|
* We don't know how much we wrote, so just return
|
|
* the number of bytes which were direct-written
|
|
*/
|
|
}
|
|
} else {
|
|
current->backing_dev_info = inode_to_bdi(inode);
|
|
written = generic_perform_write(file, from, *ppos);
|
|
if (likely(written >= 0))
|
|
iocb->ki_pos = *ppos + written;
|
|
current->backing_dev_info = NULL;
|
|
}
|
|
|
|
out_dio:
|
|
/* buffered aio wouldn't have proper lock coverage today */
|
|
BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
|
|
|
|
if (unlikely(written <= 0))
|
|
goto no_sync;
|
|
|
|
if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) ||
|
|
((file->f_flags & O_DIRECT) && !direct_io)) {
|
|
ret = filemap_fdatawrite_range(file->f_mapping,
|
|
iocb->ki_pos - written,
|
|
iocb->ki_pos - 1);
|
|
if (ret < 0)
|
|
written = ret;
|
|
|
|
if (!ret) {
|
|
ret = jbd2_journal_force_commit(osb->journal->j_journal);
|
|
if (ret < 0)
|
|
written = ret;
|
|
}
|
|
|
|
if (!ret)
|
|
ret = filemap_fdatawait_range(file->f_mapping,
|
|
iocb->ki_pos - written,
|
|
iocb->ki_pos - 1);
|
|
}
|
|
|
|
no_sync:
|
|
/*
|
|
* deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
|
|
* function pointer which is called when o_direct io completes so that
|
|
* it can unlock our rw lock.
|
|
* Unfortunately there are error cases which call end_io and others
|
|
* that don't. so we don't have to unlock the rw_lock if either an
|
|
* async dio is going to do it in the future or an end_io after an
|
|
* error has already done it.
|
|
*/
|
|
if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) {
|
|
rw_level = -1;
|
|
have_alloc_sem = 0;
|
|
unaligned_dio = 0;
|
|
}
|
|
|
|
if (unaligned_dio) {
|
|
ocfs2_iocb_clear_unaligned_aio(iocb);
|
|
mutex_unlock(&OCFS2_I(inode)->ip_unaligned_aio);
|
|
}
|
|
|
|
out:
|
|
if (rw_level != -1)
|
|
ocfs2_rw_unlock(inode, rw_level);
|
|
|
|
out_sems:
|
|
if (have_alloc_sem)
|
|
ocfs2_iocb_clear_sem_locked(iocb);
|
|
|
|
mutex_unlock(&inode->i_mutex);
|
|
|
|
if (written)
|
|
ret = written;
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ocfs2_file_splice_read(struct file *in,
|
|
loff_t *ppos,
|
|
struct pipe_inode_info *pipe,
|
|
size_t len,
|
|
unsigned int flags)
|
|
{
|
|
int ret = 0, lock_level = 0;
|
|
struct inode *inode = file_inode(in);
|
|
|
|
trace_ocfs2_file_splice_read(inode, in, in->f_path.dentry,
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
in->f_path.dentry->d_name.len,
|
|
in->f_path.dentry->d_name.name, len);
|
|
|
|
/*
|
|
* See the comment in ocfs2_file_read_iter()
|
|
*/
|
|
ret = ocfs2_inode_lock_atime(inode, in->f_path.mnt, &lock_level);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
ocfs2_inode_unlock(inode, lock_level);
|
|
|
|
ret = generic_file_splice_read(in, ppos, pipe, len, flags);
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ocfs2_file_read_iter(struct kiocb *iocb,
|
|
struct iov_iter *to)
|
|
{
|
|
int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0;
|
|
struct file *filp = iocb->ki_filp;
|
|
struct inode *inode = file_inode(filp);
|
|
|
|
trace_ocfs2_file_aio_read(inode, filp, filp->f_path.dentry,
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
filp->f_path.dentry->d_name.len,
|
|
filp->f_path.dentry->d_name.name,
|
|
to->nr_segs); /* GRRRRR */
|
|
|
|
|
|
if (!inode) {
|
|
ret = -EINVAL;
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
|
|
ocfs2_iocb_clear_sem_locked(iocb);
|
|
|
|
/*
|
|
* buffered reads protect themselves in ->readpage(). O_DIRECT reads
|
|
* need locks to protect pending reads from racing with truncate.
|
|
*/
|
|
if (filp->f_flags & O_DIRECT) {
|
|
have_alloc_sem = 1;
|
|
ocfs2_iocb_set_sem_locked(iocb);
|
|
|
|
ret = ocfs2_rw_lock(inode, 0);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
rw_level = 0;
|
|
/* communicate with ocfs2_dio_end_io */
|
|
ocfs2_iocb_set_rw_locked(iocb, rw_level);
|
|
}
|
|
|
|
/*
|
|
* We're fine letting folks race truncates and extending
|
|
* writes with read across the cluster, just like they can
|
|
* locally. Hence no rw_lock during read.
|
|
*
|
|
* Take and drop the meta data lock to update inode fields
|
|
* like i_size. This allows the checks down below
|
|
* generic_file_aio_read() a chance of actually working.
|
|
*/
|
|
ret = ocfs2_inode_lock_atime(inode, filp->f_path.mnt, &lock_level);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
ocfs2_inode_unlock(inode, lock_level);
|
|
|
|
ret = generic_file_read_iter(iocb, to);
|
|
trace_generic_file_aio_read_ret(ret);
|
|
|
|
/* buffered aio wouldn't have proper lock coverage today */
|
|
BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));
|
|
|
|
/* see ocfs2_file_write_iter */
|
|
if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
|
|
rw_level = -1;
|
|
have_alloc_sem = 0;
|
|
}
|
|
|
|
bail:
|
|
if (have_alloc_sem)
|
|
ocfs2_iocb_clear_sem_locked(iocb);
|
|
|
|
if (rw_level != -1)
|
|
ocfs2_rw_unlock(inode, rw_level);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Refer generic_file_llseek_unlocked() */
|
|
static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence)
|
|
{
|
|
struct inode *inode = file->f_mapping->host;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
switch (whence) {
|
|
case SEEK_SET:
|
|
break;
|
|
case SEEK_END:
|
|
/* SEEK_END requires the OCFS2 inode lock for the file
|
|
* because it references the file's size.
|
|
*/
|
|
ret = ocfs2_inode_lock(inode, NULL, 0);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
offset += i_size_read(inode);
|
|
ocfs2_inode_unlock(inode, 0);
|
|
break;
|
|
case SEEK_CUR:
|
|
if (offset == 0) {
|
|
offset = file->f_pos;
|
|
goto out;
|
|
}
|
|
offset += file->f_pos;
|
|
break;
|
|
case SEEK_DATA:
|
|
case SEEK_HOLE:
|
|
ret = ocfs2_seek_data_hole_offset(file, &offset, whence);
|
|
if (ret)
|
|
goto out;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
|
|
|
|
out:
|
|
mutex_unlock(&inode->i_mutex);
|
|
if (ret)
|
|
return ret;
|
|
return offset;
|
|
}
|
|
|
|
const struct inode_operations ocfs2_file_iops = {
|
|
.setattr = ocfs2_setattr,
|
|
.getattr = ocfs2_getattr,
|
|
.permission = ocfs2_permission,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.listxattr = ocfs2_listxattr,
|
|
.removexattr = generic_removexattr,
|
|
.fiemap = ocfs2_fiemap,
|
|
.get_acl = ocfs2_iop_get_acl,
|
|
.set_acl = ocfs2_iop_set_acl,
|
|
};
|
|
|
|
const struct inode_operations ocfs2_special_file_iops = {
|
|
.setattr = ocfs2_setattr,
|
|
.getattr = ocfs2_getattr,
|
|
.permission = ocfs2_permission,
|
|
.get_acl = ocfs2_iop_get_acl,
|
|
.set_acl = ocfs2_iop_set_acl,
|
|
};
|
|
|
|
/*
|
|
* Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
|
|
* ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
|
|
*/
|
|
const struct file_operations ocfs2_fops = {
|
|
.llseek = ocfs2_file_llseek,
|
|
.read = new_sync_read,
|
|
.write = new_sync_write,
|
|
.mmap = ocfs2_mmap,
|
|
.fsync = ocfs2_sync_file,
|
|
.release = ocfs2_file_release,
|
|
.open = ocfs2_file_open,
|
|
.read_iter = ocfs2_file_read_iter,
|
|
.write_iter = ocfs2_file_write_iter,
|
|
.unlocked_ioctl = ocfs2_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ocfs2_compat_ioctl,
|
|
#endif
|
|
.lock = ocfs2_lock,
|
|
.flock = ocfs2_flock,
|
|
.splice_read = ocfs2_file_splice_read,
|
|
.splice_write = iter_file_splice_write,
|
|
.fallocate = ocfs2_fallocate,
|
|
};
|
|
|
|
const struct file_operations ocfs2_dops = {
|
|
.llseek = generic_file_llseek,
|
|
.read = generic_read_dir,
|
|
.iterate = ocfs2_readdir,
|
|
.fsync = ocfs2_sync_file,
|
|
.release = ocfs2_dir_release,
|
|
.open = ocfs2_dir_open,
|
|
.unlocked_ioctl = ocfs2_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ocfs2_compat_ioctl,
|
|
#endif
|
|
.lock = ocfs2_lock,
|
|
.flock = ocfs2_flock,
|
|
};
|
|
|
|
/*
|
|
* POSIX-lockless variants of our file_operations.
|
|
*
|
|
* These will be used if the underlying cluster stack does not support
|
|
* posix file locking, if the user passes the "localflocks" mount
|
|
* option, or if we have a local-only fs.
|
|
*
|
|
* ocfs2_flock is in here because all stacks handle UNIX file locks,
|
|
* so we still want it in the case of no stack support for
|
|
* plocks. Internally, it will do the right thing when asked to ignore
|
|
* the cluster.
|
|
*/
|
|
const struct file_operations ocfs2_fops_no_plocks = {
|
|
.llseek = ocfs2_file_llseek,
|
|
.read = new_sync_read,
|
|
.write = new_sync_write,
|
|
.mmap = ocfs2_mmap,
|
|
.fsync = ocfs2_sync_file,
|
|
.release = ocfs2_file_release,
|
|
.open = ocfs2_file_open,
|
|
.read_iter = ocfs2_file_read_iter,
|
|
.write_iter = ocfs2_file_write_iter,
|
|
.unlocked_ioctl = ocfs2_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ocfs2_compat_ioctl,
|
|
#endif
|
|
.flock = ocfs2_flock,
|
|
.splice_read = ocfs2_file_splice_read,
|
|
.splice_write = iter_file_splice_write,
|
|
.fallocate = ocfs2_fallocate,
|
|
};
|
|
|
|
const struct file_operations ocfs2_dops_no_plocks = {
|
|
.llseek = generic_file_llseek,
|
|
.read = generic_read_dir,
|
|
.iterate = ocfs2_readdir,
|
|
.fsync = ocfs2_sync_file,
|
|
.release = ocfs2_dir_release,
|
|
.open = ocfs2_dir_open,
|
|
.unlocked_ioctl = ocfs2_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ocfs2_compat_ioctl,
|
|
#endif
|
|
.flock = ocfs2_flock,
|
|
};
|