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xfs: Conditionally upgrade existing inodes to use large extent counters

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This commit enables upgrading existing inodes to use large extent counters
provided that underlying filesystem's superblock has large extent counter
feature enabled.

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
This commit is contained in:
Chandan Babu R 2022-03-09 07:49:36 +00:00
parent 83a21c1844
commit 4f86bb4b66
11 changed files with 75 additions and 2 deletions
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3
fs/xfs/libxfs/xfs_attr.c
View File

@ -776,6 +776,9 @@ xfs_attr_set(
if (args->value || xfs_inode_hasattr(dp)) {
error = xfs_iext_count_may_overflow(dp, XFS_ATTR_FORK,
XFS_IEXT_ATTR_MANIP_CNT(rmt_blks));
if (error == -EFBIG)
error = xfs_iext_count_upgrade(args->trans, dp,
XFS_IEXT_ATTR_MANIP_CNT(rmt_blks));
if (error)
goto out_trans_cancel;
}

6
fs/xfs/libxfs/xfs_bmap.c
View File

@ -4524,14 +4524,16 @@ xfs_bmapi_convert_delalloc(
return error;
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, 0);
error = xfs_iext_count_may_overflow(ip, whichfork,
XFS_IEXT_ADD_NOSPLIT_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip,
XFS_IEXT_ADD_NOSPLIT_CNT);
if (error)
goto out_trans_cancel;
xfs_trans_ijoin(tp, ip, 0);
if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &bma.icur, &bma.got) ||
bma.got.br_startoff > offset_fsb) {
/*

11
fs/xfs/libxfs/xfs_format.h
View File

@ -934,6 +934,17 @@ enum xfs_dinode_fmt {
#define XFS_MAX_EXTCNT_DATA_FORK_SMALL ((xfs_extnum_t)((1ULL << 31) - 1))
#define XFS_MAX_EXTCNT_ATTR_FORK_SMALL ((xfs_extnum_t)((1ULL << 15) - 1))
/*
* When we upgrade an inode to the large extent counts, the maximum value by
* which the extent count can increase is bound by the change in size of the
* on-disk field. No upgrade operation should ever be adding more than a few
* tens of extents, so if we get a really large value it is a sign of a code bug
* or corruption.
*/
#define XFS_MAX_EXTCNT_UPGRADE_NR \
min(XFS_MAX_EXTCNT_ATTR_FORK_LARGE - XFS_MAX_EXTCNT_ATTR_FORK_SMALL, \
XFS_MAX_EXTCNT_DATA_FORK_LARGE - XFS_MAX_EXTCNT_DATA_FORK_SMALL)
/*
* Inode minimum and maximum sizes.
*/

24
fs/xfs/libxfs/xfs_inode_fork.c
View File

@ -756,3 +756,27 @@ xfs_iext_count_may_overflow(
return 0;
}
/*
* Upgrade this inode's extent counter fields to be able to handle a potential
* increase in the extent count by nr_to_add. Normally this is the same
* quantity that caused xfs_iext_count_may_overflow() to return -EFBIG.
*/
int
xfs_iext_count_upgrade(
struct xfs_trans *tp,
struct xfs_inode *ip,
uint nr_to_add)
{
ASSERT(nr_to_add <= XFS_MAX_EXTCNT_UPGRADE_NR);
if (!xfs_has_large_extent_counts(ip->i_mount) ||
xfs_inode_has_large_extent_counts(ip) ||
XFS_TEST_ERROR(false, ip->i_mount, XFS_ERRTAG_REDUCE_MAX_IEXTENTS))
return -EFBIG;
ip->i_diflags2 |= XFS_DIFLAG2_NREXT64;
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
return 0;
}

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

@ -275,6 +275,8 @@ int xfs_ifork_verify_local_data(struct xfs_inode *ip);
int xfs_ifork_verify_local_attr(struct xfs_inode *ip);
int xfs_iext_count_may_overflow(struct xfs_inode *ip, int whichfork,
int nr_to_add);
int xfs_iext_count_upgrade(struct xfs_trans *tp, struct xfs_inode *ip,
uint nr_to_add);
/* returns true if the fork has extents but they are not read in yet. */
static inline bool xfs_need_iread_extents(struct xfs_ifork *ifp)

2
fs/xfs/xfs_bmap_item.c
View File

@ -506,6 +506,8 @@ xfs_bui_item_recover(
iext_delta = XFS_IEXT_PUNCH_HOLE_CNT;
error = xfs_iext_count_may_overflow(ip, whichfork, iext_delta);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip, iext_delta);
if (error)
goto err_cancel;

13
fs/xfs/xfs_bmap_util.c
View File

@ -859,6 +859,9 @@ xfs_alloc_file_space(
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
XFS_IEXT_ADD_NOSPLIT_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip,
XFS_IEXT_ADD_NOSPLIT_CNT);
if (error)
goto error;
@ -914,6 +917,8 @@ xfs_unmap_extent(
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
XFS_IEXT_PUNCH_HOLE_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip, XFS_IEXT_PUNCH_HOLE_CNT);
if (error)
goto out_trans_cancel;
@ -1195,6 +1200,8 @@ xfs_insert_file_space(
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
XFS_IEXT_PUNCH_HOLE_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip, XFS_IEXT_PUNCH_HOLE_CNT);
if (error)
goto out_trans_cancel;
@ -1423,6 +1430,9 @@ xfs_swap_extent_rmap(
error = xfs_iext_count_may_overflow(ip,
XFS_DATA_FORK,
XFS_IEXT_SWAP_RMAP_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip,
XFS_IEXT_SWAP_RMAP_CNT);
if (error)
goto out;
}
@ -1431,6 +1441,9 @@ xfs_swap_extent_rmap(
error = xfs_iext_count_may_overflow(tip,
XFS_DATA_FORK,
XFS_IEXT_SWAP_RMAP_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip,
XFS_IEXT_SWAP_RMAP_CNT);
if (error)
goto out;
}

3
fs/xfs/xfs_dquot.c
View File

@ -322,6 +322,9 @@ xfs_dquot_disk_alloc(
error = xfs_iext_count_may_overflow(quotip, XFS_DATA_FORK,
XFS_IEXT_ADD_NOSPLIT_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, quotip,
XFS_IEXT_ADD_NOSPLIT_CNT);
if (error)
goto err_cancel;

5
fs/xfs/xfs_iomap.c
View File

@ -251,6 +251,8 @@ xfs_iomap_write_direct(
return error;
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK, nr_exts);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip, nr_exts);
if (error)
goto out_trans_cancel;
@ -555,6 +557,9 @@ xfs_iomap_write_unwritten(
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
XFS_IEXT_WRITE_UNWRITTEN_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip,
XFS_IEXT_WRITE_UNWRITTEN_CNT);
if (error)
goto error_on_bmapi_transaction;

5
fs/xfs/xfs_reflink.c
View File

@ -620,6 +620,9 @@ xfs_reflink_end_cow_extent(
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
XFS_IEXT_REFLINK_END_COW_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip,
XFS_IEXT_REFLINK_END_COW_CNT);
if (error)
goto out_cancel;
@ -1121,6 +1124,8 @@ xfs_reflink_remap_extent(
++iext_delta;
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK, iext_delta);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip, iext_delta);
if (error)
goto out_cancel;

3
fs/xfs/xfs_rtalloc.c
View File

@ -806,6 +806,9 @@ xfs_growfs_rt_alloc(
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
XFS_IEXT_ADD_NOSPLIT_CNT);
if (error == -EFBIG)
error = xfs_iext_count_upgrade(tp, ip,
XFS_IEXT_ADD_NOSPLIT_CNT);
if (error)
goto out_trans_cancel;