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- Add some locking assertions for the _ilock helpers.
 - Revert the XFS_QMOPT_NOLOCK patch; after discussion with hch the
   online fsck patch that would have needed it has been redesigned and
   no longer needs it.
 - Fix behavioral regression of SEEK_HOLE/DATA with negative offsets to match
   4.12-era XFS behavior.
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Merge tag 'xfs-4.13-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull XFS fixes from Darrick Wong:
 "Largely debugging and regression fixes.

   - Add some locking assertions for the _ilock helpers.

   - Revert the XFS_QMOPT_NOLOCK patch; after discussion with hch the
     online fsck patch that would have needed it has been redesigned and
     no longer needs it.

   - Fix behavioral regression of SEEK_HOLE/DATA with negative offsets
     to match 4.12-era XFS behavior"

* tag 'xfs-4.13-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  vfs: in iomap seek_{hole,data}, return -ENXIO for negative offsets
  Revert "xfs: grab dquots without taking the ilock"
  xfs: assert locking precondition in xfs_readlink_bmap_ilocked
  xfs: assert locking precondіtion in xfs_attr_list_int_ilocked
  xfs: fixup xfs_attr_get_ilocked
This commit is contained in:
Linus Torvalds 2017-07-14 22:57:32 -07:00
commit a80099a152
6 changed files with 15 additions and 17 deletions
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8
fs/iomap.c
View File

@ -610,8 +610,8 @@ iomap_seek_hole(struct inode *inode, loff_t offset, const struct iomap_ops *ops)
loff_t length = size - offset;
loff_t ret;
/* Nothing to be found beyond the end of the file. */
if (offset >= size)
/* Nothing to be found before or beyond the end of the file. */
if (offset < 0 || offset >= size)
return -ENXIO;
while (length > 0) {
@ -656,8 +656,8 @@ iomap_seek_data(struct inode *inode, loff_t offset, const struct iomap_ops *ops)
loff_t length = size - offset;
loff_t ret;
/* Nothing to be found beyond the end of the file. */
if (offset >= size)
/* Nothing to be found before or beyond the end of the file. */
if (offset < 0 || offset >= size)
return -ENXIO;
while (length > 0) {

4
fs/xfs/libxfs/xfs_attr.c
View File

@ -114,12 +114,14 @@ xfs_inode_hasattr(
* Overall external interface routines.
*========================================================================*/
/* Retrieve an extended attribute and its value. Must have iolock. */
/* Retrieve an extended attribute and its value. Must have ilock. */
int
xfs_attr_get_ilocked(
struct xfs_inode *ip,
struct xfs_da_args *args)
{
ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
if (!xfs_inode_hasattr(ip))
return -ENOATTR;
else if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL)

2
fs/xfs/libxfs/xfs_quota_defs.h
View File

@ -136,8 +136,6 @@ typedef uint16_t xfs_qwarncnt_t;
*/
#define XFS_QMOPT_INHERIT 0x1000000
#define XFS_QMOPT_NOLOCK 0x2000000 /* don't ilock during dqget */
/*
* flags to xfs_trans_mod_dquot.
*/

2
fs/xfs/xfs_attr_list.c
View File

@ -463,6 +463,8 @@ xfs_attr_list_int_ilocked(
{
struct xfs_inode *dp = context->dp;
ASSERT(xfs_isilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
/*
* Decide on what work routines to call based on the inode size.
*/

14
fs/xfs/xfs_dquot.c
View File

@ -472,23 +472,18 @@ xfs_qm_dqtobp(
struct xfs_mount *mp = dqp->q_mount;
xfs_dqid_t id = be32_to_cpu(dqp->q_core.d_id);
struct xfs_trans *tp = (tpp ? *tpp : NULL);
uint lock_mode = 0;
uint lock_mode;
quotip = xfs_quota_inode(dqp->q_mount, dqp->dq_flags);
dqp->q_fileoffset = (xfs_fileoff_t)id / mp->m_quotainfo->qi_dqperchunk;
ASSERT(!(flags & XFS_QMOPT_NOLOCK) ||
xfs_isilocked(quotip, XFS_ILOCK_SHARED) ||
xfs_isilocked(quotip, XFS_ILOCK_EXCL));
if (!(flags & XFS_QMOPT_NOLOCK))
lock_mode = xfs_ilock_data_map_shared(quotip);
lock_mode = xfs_ilock_data_map_shared(quotip);
if (!xfs_this_quota_on(dqp->q_mount, dqp->dq_flags)) {
/*
* Return if this type of quotas is turned off while we
* didn't have the quota inode lock.
*/
if (lock_mode)
xfs_iunlock(quotip, lock_mode);
xfs_iunlock(quotip, lock_mode);
return -ESRCH;
}
@ -498,8 +493,7 @@ xfs_qm_dqtobp(
error = xfs_bmapi_read(quotip, dqp->q_fileoffset,
XFS_DQUOT_CLUSTER_SIZE_FSB, &map, &nmaps, 0);
if (lock_mode)
xfs_iunlock(quotip, lock_mode);
xfs_iunlock(quotip, lock_mode);
if (error)
return error;

2
fs/xfs/xfs_symlink.c
View File

@ -61,6 +61,8 @@ xfs_readlink_bmap_ilocked(
int fsblocks = 0;
int offset;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
fsblocks = xfs_symlink_blocks(mp, pathlen);
error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0);
if (error)