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Fixes for 5.10-rc1:

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- Make fallocate check the alignment of its arguments against the
 fundamental allocation unit of the volume the file lives on, so that we
 don't trigger the fs' alignment checks.
 - Cancel unprocessed log intents immediately when log recovery fails, to
 avoid a log deadlock.
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Merge tag 'xfs-5.10-merge-7' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
 "Two bug fixes that trickled in during the merge window:

   - Make fallocate check the alignment of its arguments against the
     fundamental allocation unit of the volume the file lives on, so
     that we don't trigger the fs' alignment checks.

   - Cancel unprocessed log intents immediately when log recovery fails,
     to avoid a log deadlock"

* tag 'xfs-5.10-merge-7' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: cancel intents immediately if process_intents fails
  xfs: fix fallocate functions when rtextsize is larger than 1
This commit is contained in:
Linus Torvalds 2020-10-23 17:15:06 -07:00
commit f11901ed72
4 changed files with 54 additions and 18 deletions
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18
fs/xfs/xfs_bmap_util.c
View File

@ -947,11 +947,11 @@ xfs_free_file_space(
endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len);
/* We can only free complete realtime extents. */
if (XFS_IS_REALTIME_INODE(ip)) {
xfs_extlen_t extsz = xfs_get_extsz_hint(ip);
if ((startoffset_fsb | endoffset_fsb) & (extsz - 1))
return -EINVAL;
if (XFS_IS_REALTIME_INODE(ip) && mp->m_sb.sb_rextsize > 1) {
startoffset_fsb = roundup_64(startoffset_fsb,
mp->m_sb.sb_rextsize);
endoffset_fsb = rounddown_64(endoffset_fsb,
mp->m_sb.sb_rextsize);
}
/*
@ -1147,14 +1147,6 @@ xfs_insert_file_space(
trace_xfs_insert_file_space(ip);
/* We can only insert complete realtime extents. */
if (XFS_IS_REALTIME_INODE(ip)) {
xfs_extlen_t extsz = xfs_get_extsz_hint(ip);
if ((stop_fsb | shift_fsb) & (extsz - 1))
return -EINVAL;
}
error = xfs_bmap_can_insert_extents(ip, stop_fsb, shift_fsb);
if (error)
return error;

40
fs/xfs/xfs_file.c
View File

@ -32,6 +32,39 @@
static const struct vm_operations_struct xfs_file_vm_ops;
/*
* Decide if the given file range is aligned to the size of the fundamental
* allocation unit for the file.
*/
static bool
xfs_is_falloc_aligned(
struct xfs_inode *ip,
loff_t pos,
long long int len)
{
struct xfs_mount *mp = ip->i_mount;
uint64_t mask;
if (XFS_IS_REALTIME_INODE(ip)) {
if (!is_power_of_2(mp->m_sb.sb_rextsize)) {
u64 rextbytes;
u32 mod;
rextbytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
div_u64_rem(pos, rextbytes, &mod);
if (mod)
return false;
div_u64_rem(len, rextbytes, &mod);
return mod == 0;
}
mask = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize) - 1;
} else {
mask = mp->m_sb.sb_blocksize - 1;
}
return !((pos | len) & mask);
}
int
xfs_update_prealloc_flags(
struct xfs_inode *ip,
@ -850,9 +883,7 @@ xfs_file_fallocate(
if (error)
goto out_unlock;
} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
unsigned int blksize_mask = i_blocksize(inode) - 1;
if (offset & blksize_mask || len & blksize_mask) {
if (!xfs_is_falloc_aligned(ip, offset, len)) {
error = -EINVAL;
goto out_unlock;
}
@ -872,10 +903,9 @@ xfs_file_fallocate(
if (error)
goto out_unlock;
} else if (mode & FALLOC_FL_INSERT_RANGE) {
unsigned int blksize_mask = i_blocksize(inode) - 1;
loff_t isize = i_size_read(inode);
if (offset & blksize_mask || len & blksize_mask) {
if (!xfs_is_falloc_aligned(ip, offset, len)) {
error = -EINVAL;
goto out_unlock;
}

6
fs/xfs/xfs_linux.h
View File

@ -175,6 +175,12 @@ static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
#define xfs_stack_trace() dump_stack()
static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
{
do_div(x, y);
return x * y;
}
static inline uint64_t roundup_64(uint64_t x, uint32_t y)
{
x += y - 1;

8
fs/xfs/xfs_log_recover.c
View File

@ -3446,6 +3446,14 @@ xlog_recover_finish(
int error;
error = xlog_recover_process_intents(log);
if (error) {
/*
* Cancel all the unprocessed intent items now so that
* we don't leave them pinned in the AIL. This can
* cause the AIL to livelock on the pinned item if
* anyone tries to push the AIL (inode reclaim does
* this) before we get around to xfs_log_mount_cancel.
*/
xlog_recover_cancel_intents(log);
xfs_alert(log->l_mp, "Failed to recover intents");
return error;
}