* [PATCH 2/3] xfs: remove bitfield based superblock updates
2014-09-25 12:20 [PATCH 0/3 v2] xfs: superblock logging rework Dave Chinner
2014-09-25 12:20 ` [PATCH 1/3] xfs: consider freeze levels in xfs_fs_writable() Dave Chinner
@ 2014-09-25 12:20 ` Dave Chinner
2014-09-26 9:45 ` Christoph Hellwig
2014-09-26 10:00 ` Christoph Hellwig
2014-09-25 12:20 ` [PATCH 3/3] xfs: consolidate superblock logging functions Dave Chinner
2 siblings, 2 replies; 13+ messages in thread
From: Dave Chinner @ 2014-09-25 12:20 UTC (permalink / raw)
To: xfs
From: Dave Chinner <dchinner@redhat.com>
When we log changes to the superblock, we first have to write them
to the on-disk buffer, and then log that. Right now we have a
complex bitfield based arrangement to only write the modified field
to the buffer before we log it.
This used to be necessary as a performance optimisation because we
logged the superblock buffer in every extent or inode allocation or
freeing, and so performance was extremely important. We haven't done
this for years, however, ever since the lazy superblock counters
pulled the superblock logging out of the transaction commit
fast path.
Hence we have a bunch of complexity that is not necessary that makes
writing the in-core superblock to disk much more complex than it
needs to be. We only need to log the superblock now during
management operations (e.g. during mount, unmount or quota control
operations) so it is not a performance critical path anymore.
As such, remove the complex field based logging mechanism and
replace it with a simple conversion function similar to what we use
for all other on-disk structures.
This means we always log the entirity of the superblock, but again
because we rarely modify the superblock this is not an issue for log
bandwidth or CPU time. Indeed, if we do log the superblock
frequently, delayed logging will minimise the impact of this
overhead.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
---
fs/xfs/libxfs/xfs_attr_leaf.c | 2 +-
fs/xfs/libxfs/xfs_bmap.c | 14 +--
fs/xfs/libxfs/xfs_sb.c | 287 +++++++++++++++---------------------------
fs/xfs/libxfs/xfs_sb.h | 10 +-
fs/xfs/xfs_fsops.c | 6 +-
fs/xfs/xfs_mount.c | 18 +--
fs/xfs/xfs_mount.h | 2 +-
fs/xfs/xfs_qm.c | 26 +---
fs/xfs/xfs_qm.h | 2 +-
fs/xfs/xfs_qm_syscalls.c | 13 +-
fs/xfs/xfs_super.c | 2 +-
11 files changed, 130 insertions(+), 252 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
index b1f73db..f4a47a7 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -405,7 +405,7 @@ xfs_sbversion_add_attr2(xfs_mount_t *mp, xfs_trans_t *tp)
if (!xfs_sb_version_hasattr2(&mp->m_sb)) {
xfs_sb_version_addattr2(&mp->m_sb);
spin_unlock(&mp->m_sb_lock);
- xfs_mod_sb(tp, XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
+ xfs_mod_sb(tp);
} else
spin_unlock(&mp->m_sb_lock);
}
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index d85ccc3..e33a780 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -1224,22 +1224,20 @@ xfs_bmap_add_attrfork(
goto bmap_cancel;
if (!xfs_sb_version_hasattr(&mp->m_sb) ||
(!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) {
- __int64_t sbfields = 0;
+ bool mod_sb = false;
spin_lock(&mp->m_sb_lock);
if (!xfs_sb_version_hasattr(&mp->m_sb)) {
xfs_sb_version_addattr(&mp->m_sb);
- sbfields |= XFS_SB_VERSIONNUM;
+ mod_sb = true;
}
if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) {
xfs_sb_version_addattr2(&mp->m_sb);
- sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
+ mod_sb = true;
}
- if (sbfields) {
- spin_unlock(&mp->m_sb_lock);
- xfs_mod_sb(tp, sbfields);
- } else
- spin_unlock(&mp->m_sb_lock);
+ spin_unlock(&mp->m_sb_lock);
+ if (mod_sb)
+ xfs_mod_sb(tp);
}
error = xfs_bmap_finish(&tp, &flist, &committed);
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 8426e5e..2803325 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -42,69 +42,6 @@
* Physical superblock buffer manipulations. Shared with libxfs in userspace.
*/
-static const struct {
- short offset;
- short type; /* 0 = integer
- * 1 = binary / string (no translation)
- */
-} xfs_sb_info[] = {
- { offsetof(xfs_sb_t, sb_magicnum), 0 },
- { offsetof(xfs_sb_t, sb_blocksize), 0 },
- { offsetof(xfs_sb_t, sb_dblocks), 0 },
- { offsetof(xfs_sb_t, sb_rblocks), 0 },
- { offsetof(xfs_sb_t, sb_rextents), 0 },
- { offsetof(xfs_sb_t, sb_uuid), 1 },
- { offsetof(xfs_sb_t, sb_logstart), 0 },
- { offsetof(xfs_sb_t, sb_rootino), 0 },
- { offsetof(xfs_sb_t, sb_rbmino), 0 },
- { offsetof(xfs_sb_t, sb_rsumino), 0 },
- { offsetof(xfs_sb_t, sb_rextsize), 0 },
- { offsetof(xfs_sb_t, sb_agblocks), 0 },
- { offsetof(xfs_sb_t, sb_agcount), 0 },
- { offsetof(xfs_sb_t, sb_rbmblocks), 0 },
- { offsetof(xfs_sb_t, sb_logblocks), 0 },
- { offsetof(xfs_sb_t, sb_versionnum), 0 },
- { offsetof(xfs_sb_t, sb_sectsize), 0 },
- { offsetof(xfs_sb_t, sb_inodesize), 0 },
- { offsetof(xfs_sb_t, sb_inopblock), 0 },
- { offsetof(xfs_sb_t, sb_fname[0]), 1 },
- { offsetof(xfs_sb_t, sb_blocklog), 0 },
- { offsetof(xfs_sb_t, sb_sectlog), 0 },
- { offsetof(xfs_sb_t, sb_inodelog), 0 },
- { offsetof(xfs_sb_t, sb_inopblog), 0 },
- { offsetof(xfs_sb_t, sb_agblklog), 0 },
- { offsetof(xfs_sb_t, sb_rextslog), 0 },
- { offsetof(xfs_sb_t, sb_inprogress), 0 },
- { offsetof(xfs_sb_t, sb_imax_pct), 0 },
- { offsetof(xfs_sb_t, sb_icount), 0 },
- { offsetof(xfs_sb_t, sb_ifree), 0 },
- { offsetof(xfs_sb_t, sb_fdblocks), 0 },
- { offsetof(xfs_sb_t, sb_frextents), 0 },
- { offsetof(xfs_sb_t, sb_uquotino), 0 },
- { offsetof(xfs_sb_t, sb_gquotino), 0 },
- { offsetof(xfs_sb_t, sb_qflags), 0 },
- { offsetof(xfs_sb_t, sb_flags), 0 },
- { offsetof(xfs_sb_t, sb_shared_vn), 0 },
- { offsetof(xfs_sb_t, sb_inoalignmt), 0 },
- { offsetof(xfs_sb_t, sb_unit), 0 },
- { offsetof(xfs_sb_t, sb_width), 0 },
- { offsetof(xfs_sb_t, sb_dirblklog), 0 },
- { offsetof(xfs_sb_t, sb_logsectlog), 0 },
- { offsetof(xfs_sb_t, sb_logsectsize), 0 },
- { offsetof(xfs_sb_t, sb_logsunit), 0 },
- { offsetof(xfs_sb_t, sb_features2), 0 },
- { offsetof(xfs_sb_t, sb_bad_features2), 0 },
- { offsetof(xfs_sb_t, sb_features_compat), 0 },
- { offsetof(xfs_sb_t, sb_features_ro_compat), 0 },
- { offsetof(xfs_sb_t, sb_features_incompat), 0 },
- { offsetof(xfs_sb_t, sb_features_log_incompat), 0 },
- { offsetof(xfs_sb_t, sb_crc), 0 },
- { offsetof(xfs_sb_t, sb_pad), 0 },
- { offsetof(xfs_sb_t, sb_pquotino), 0 },
- { offsetof(xfs_sb_t, sb_lsn), 0 },
- { sizeof(xfs_sb_t), 0 }
-};
-
/*
* Reference counting access wrappers to the perag structures.
* Because we never free per-ag structures, the only thing we
@@ -461,125 +398,119 @@ xfs_sb_from_disk(
__xfs_sb_from_disk(to, from, true);
}
-static inline void
+static void
xfs_sb_quota_to_disk(
- xfs_dsb_t *to,
- xfs_sb_t *from,
- __int64_t *fields)
+ struct xfs_dsb *to,
+ struct xfs_sb *from)
{
__uint16_t qflags = from->sb_qflags;
+ to->sb_uquotino = cpu_to_be64(from->sb_uquotino);
+ if (xfs_sb_version_has_pquotino(from)) {
+ to->sb_qflags = be16_to_cpu(from->sb_qflags);
+ to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
+ to->sb_pquotino = cpu_to_be64(from->sb_pquotino);
+ return;
+ }
+
/*
- * We need to do these manipilations only if we are working
- * with an older version of on-disk superblock.
+ * The in-core version of sb_qflags do not have XFS_OQUOTA_*
+ * flags, whereas the on-disk version does. So, convert incore
+ * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags.
*/
- if (xfs_sb_version_has_pquotino(from))
- return;
+ qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD |
+ XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD);
- if (*fields & XFS_SB_QFLAGS) {
- /*
- * The in-core version of sb_qflags do not have
- * XFS_OQUOTA_* flags, whereas the on-disk version
- * does. So, convert incore XFS_{PG}QUOTA_* flags
- * to on-disk XFS_OQUOTA_* flags.
- */
- qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD |
- XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD);
-
- if (from->sb_qflags &
- (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD))
- qflags |= XFS_OQUOTA_ENFD;
- if (from->sb_qflags &
- (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD))
- qflags |= XFS_OQUOTA_CHKD;
- to->sb_qflags = cpu_to_be16(qflags);
- *fields &= ~XFS_SB_QFLAGS;
- }
+ if (from->sb_qflags &
+ (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD))
+ qflags |= XFS_OQUOTA_ENFD;
+ if (from->sb_qflags &
+ (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD))
+ qflags |= XFS_OQUOTA_CHKD;
+ to->sb_qflags = cpu_to_be16(qflags);
/*
- * GQUOTINO and PQUOTINO cannot be used together in versions of
- * superblock that do not have pquotino. from->sb_flags tells us which
- * quota is active and should be copied to disk. If neither are active,
- * make sure we write NULLFSINO to the sb_gquotino field as a quota
- * inode value of "0" is invalid when the XFS_SB_VERSION_QUOTA feature
- * bit is set.
+ * GQUOTINO and PQUOTINO cannot be used together in versions
+ * of superblock that do not have pquotino. from->sb_flags
+ * tells us which quota is active and should be copied to
+ * disk. If neither are active, we should NULL the inode.
*
- * Note that we don't need to handle the sb_uquotino or sb_pquotino here
- * as they do not require any translation. Hence the main sb field loop
- * will write them appropriately from the in-core superblock.
+ * In all cases, the separate pquotino must remain 0 because it
+ * it beyond the "end" of the valid non-pquotino superblock.
*/
- if ((*fields & XFS_SB_GQUOTINO) &&
- (from->sb_qflags & XFS_GQUOTA_ACCT))
+ if (from->sb_qflags & XFS_GQUOTA_ACCT)
to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
- else if ((*fields & XFS_SB_PQUOTINO) &&
- (from->sb_qflags & XFS_PQUOTA_ACCT))
+ else if (from->sb_qflags & XFS_PQUOTA_ACCT)
to->sb_gquotino = cpu_to_be64(from->sb_pquotino);
- else {
- /*
- * We can't rely on just the fields being logged to tell us
- * that it is safe to write NULLFSINO - we should only do that
- * if quotas are not actually enabled. Hence only write
- * NULLFSINO if both in-core quota inodes are NULL.
- */
- if (from->sb_gquotino == NULLFSINO &&
- from->sb_pquotino == NULLFSINO)
- to->sb_gquotino = cpu_to_be64(NULLFSINO);
- }
+ else
+ to->sb_gquotino = cpu_to_be64(NULLFSINO);
- *fields &= ~(XFS_SB_PQUOTINO | XFS_SB_GQUOTINO);
+ to->sb_pquotino = 0;
}
-/*
- * Copy in core superblock to ondisk one.
- *
- * The fields argument is mask of superblock fields to copy.
- */
void
xfs_sb_to_disk(
- xfs_dsb_t *to,
- xfs_sb_t *from,
- __int64_t fields)
+ struct xfs_dsb *to,
+ struct xfs_sb *from)
{
- xfs_caddr_t to_ptr = (xfs_caddr_t)to;
- xfs_caddr_t from_ptr = (xfs_caddr_t)from;
- xfs_sb_field_t f;
- int first;
- int size;
-
- ASSERT(fields);
- if (!fields)
- return;
+ xfs_sb_quota_to_disk(to, from);
- xfs_sb_quota_to_disk(to, from, &fields);
- while (fields) {
- f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields);
- first = xfs_sb_info[f].offset;
- size = xfs_sb_info[f + 1].offset - first;
-
- ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1);
-
- if (size == 1 || xfs_sb_info[f].type == 1) {
- memcpy(to_ptr + first, from_ptr + first, size);
- } else {
- switch (size) {
- case 2:
- *(__be16 *)(to_ptr + first) =
- cpu_to_be16(*(__u16 *)(from_ptr + first));
- break;
- case 4:
- *(__be32 *)(to_ptr + first) =
- cpu_to_be32(*(__u32 *)(from_ptr + first));
- break;
- case 8:
- *(__be64 *)(to_ptr + first) =
- cpu_to_be64(*(__u64 *)(from_ptr + first));
- break;
- default:
- ASSERT(0);
- }
- }
+ to->sb_magicnum = cpu_to_be32(from->sb_magicnum);
+ to->sb_blocksize = cpu_to_be32(from->sb_blocksize);
+ to->sb_dblocks = cpu_to_be64(from->sb_dblocks);
+ to->sb_rblocks = cpu_to_be64(from->sb_rblocks);
+ to->sb_rextents = cpu_to_be64(from->sb_rextents);
+ memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
+ to->sb_logstart = cpu_to_be64(from->sb_logstart);
+ to->sb_rootino = cpu_to_be64(from->sb_rootino);
+ to->sb_rbmino = cpu_to_be64(from->sb_rbmino);
+ to->sb_rsumino = cpu_to_be64(from->sb_rsumino);
+ to->sb_rextsize = cpu_to_be32(from->sb_rextsize);
+ to->sb_agblocks = cpu_to_be32(from->sb_agblocks);
+ to->sb_agcount = cpu_to_be32(from->sb_agcount);
+ to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks);
+ to->sb_logblocks = cpu_to_be32(from->sb_logblocks);
+ to->sb_versionnum = cpu_to_be16(from->sb_versionnum);
+ to->sb_sectsize = cpu_to_be16(from->sb_sectsize);
+ to->sb_inodesize = cpu_to_be16(from->sb_inodesize);
+ to->sb_inopblock = cpu_to_be16(from->sb_inopblock);
+ memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
+ to->sb_blocklog = from->sb_blocklog;
+ to->sb_sectlog = from->sb_sectlog;
+ to->sb_inodelog = from->sb_inodelog;
+ to->sb_inopblog = from->sb_inopblog;
+ to->sb_agblklog = from->sb_agblklog;
+ to->sb_rextslog = from->sb_rextslog;
+ to->sb_inprogress = from->sb_inprogress;
+ to->sb_imax_pct = from->sb_imax_pct;
+ to->sb_icount = cpu_to_be64(from->sb_icount);
+ to->sb_ifree = cpu_to_be64(from->sb_ifree);
+ to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks);
+ to->sb_frextents = cpu_to_be64(from->sb_frextents);
- fields &= ~(1LL << f);
+
+ to->sb_flags = from->sb_flags;
+ to->sb_shared_vn = from->sb_shared_vn;
+ to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt);
+ to->sb_unit = cpu_to_be32(from->sb_unit);
+ to->sb_width = cpu_to_be32(from->sb_width);
+ to->sb_dirblklog = from->sb_dirblklog;
+ to->sb_logsectlog = from->sb_logsectlog;
+ to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize);
+ to->sb_logsunit = cpu_to_be32(from->sb_logsunit);
+ to->sb_features2 = cpu_to_be32(from->sb_features2);
+ to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2);
+
+ if (xfs_sb_version_hascrc(from)) {
+ to->sb_features_compat = cpu_to_be32(from->sb_features_compat);
+ to->sb_features_ro_compat =
+ cpu_to_be32(from->sb_features_ro_compat);
+ to->sb_features_incompat =
+ cpu_to_be32(from->sb_features_incompat);
+ to->sb_features_log_incompat =
+ cpu_to_be32(from->sb_features_log_incompat);
+ to->sb_pad = 0;
+ to->sb_lsn = cpu_to_be64(from->sb_lsn);
}
}
@@ -820,35 +751,13 @@ xfs_initialize_perag_data(
* access.
*/
void
-xfs_mod_sb(xfs_trans_t *tp, __int64_t fields)
+xfs_mod_sb(
+ struct xfs_trans *tp)
{
- xfs_buf_t *bp;
- int first;
- int last;
- xfs_mount_t *mp;
- xfs_sb_field_t f;
-
- ASSERT(fields);
- if (!fields)
- return;
- mp = tp->t_mountp;
- bp = xfs_trans_getsb(tp, mp, 0);
- first = sizeof(xfs_sb_t);
- last = 0;
-
- /* translate/copy */
-
- xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, fields);
-
- /* find modified range */
- f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields);
- ASSERT((1LL << f) & XFS_SB_MOD_BITS);
- last = xfs_sb_info[f + 1].offset - 1;
-
- f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields);
- ASSERT((1LL << f) & XFS_SB_MOD_BITS);
- first = xfs_sb_info[f].offset;
+ struct xfs_mount *mp = tp->t_mountp;
+ struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0);
+ xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
- xfs_trans_log_buf(tp, bp, first, last);
+ xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb));
}
diff --git a/fs/xfs/libxfs/xfs_sb.h b/fs/xfs/libxfs/xfs_sb.h
index 2e73970..c28b3c1 100644
--- a/fs/xfs/libxfs/xfs_sb.h
+++ b/fs/xfs/libxfs/xfs_sb.h
@@ -611,11 +611,11 @@ extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
extern void xfs_perag_put(struct xfs_perag *pag);
extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
-extern void xfs_sb_calc_crc(struct xfs_buf *);
-extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
-extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *);
-extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
-extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
+extern void xfs_sb_calc_crc(struct xfs_buf *bp);
+extern void xfs_mod_sb(struct xfs_trans *tp);
+extern void xfs_sb_mount_common(struct xfs_mount *mp, struct xfs_sb *sbp);
+extern void xfs_sb_from_disk(struct xfs_sb *to, struct xfs_dsb *from);
+extern void xfs_sb_to_disk(struct xfs_dsb *to, struct xfs_sb *from);
extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp);
#endif /* __XFS_SB_H__ */
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index f91de1e..2c44e0b 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -548,7 +548,7 @@ xfs_growfs_data_private(
saved_error = error;
continue;
}
- xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
+ xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
error = xfs_bwrite(bp);
xfs_buf_relse(bp);
@@ -787,9 +787,7 @@ xfs_fs_log_dummy(
xfs_trans_cancel(tp, 0);
return error;
}
-
- /* log the UUID because it is an unchanging field */
- xfs_mod_sb(tp, XFS_SB_UUID);
+ xfs_mod_sb(tp);
xfs_trans_set_sync(tp);
return xfs_trans_commit(tp, 0);
}
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 9073895..e555411 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -618,7 +618,7 @@ xfs_mount_reset_sbqflags(
return error;
}
- xfs_mod_sb(tp, XFS_SB_QFLAGS);
+ xfs_mod_sb(tp);
return xfs_trans_commit(tp, 0);
}
@@ -901,7 +901,7 @@ xfs_mountfs(
* perform the update e.g. for the root filesystem.
*/
if (mp->m_update_flags && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
- error = xfs_mount_log_sb(mp, mp->m_update_flags);
+ error = xfs_mount_log_sb(mp);
if (error) {
xfs_warn(mp, "failed to write sb changes");
goto out_rtunmount;
@@ -1127,7 +1127,7 @@ xfs_log_sbcount(xfs_mount_t *mp)
return error;
}
- xfs_mod_sb(tp, XFS_SB_IFREE | XFS_SB_ICOUNT | XFS_SB_FDBLOCKS);
+ xfs_mod_sb(tp);
xfs_trans_set_sync(tp);
error = xfs_trans_commit(tp, 0);
return error;
@@ -1430,25 +1430,19 @@ xfs_freesb(
*/
int
xfs_mount_log_sb(
- xfs_mount_t *mp,
- __int64_t fields)
+ xfs_mount_t *mp)
{
xfs_trans_t *tp;
int error;
- ASSERT(fields & (XFS_SB_UNIT | XFS_SB_WIDTH | XFS_SB_UUID |
- XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2 |
- XFS_SB_VERSIONNUM));
-
tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT);
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0);
if (error) {
xfs_trans_cancel(tp, 0);
return error;
}
- xfs_mod_sb(tp, fields);
- error = xfs_trans_commit(tp, 0);
- return error;
+ xfs_mod_sb(tp);
+ return xfs_trans_commit(tp, 0);
}
/*
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 30f85ca..01f66e5 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -380,7 +380,7 @@ extern void xfs_unmountfs(xfs_mount_t *);
extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
uint, int);
-extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t);
+extern int xfs_mount_log_sb(xfs_mount_t *);
extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
extern int xfs_readsb(xfs_mount_t *, int);
extern void xfs_freesb(xfs_mount_t *);
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index d68f230..1691edb 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -716,7 +716,6 @@ STATIC int
xfs_qm_qino_alloc(
xfs_mount_t *mp,
xfs_inode_t **ip,
- __int64_t sbfields,
uint flags)
{
xfs_trans_t *tp;
@@ -779,11 +778,6 @@ xfs_qm_qino_alloc(
spin_lock(&mp->m_sb_lock);
if (flags & XFS_QMOPT_SBVERSION) {
ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
- ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
- XFS_SB_GQUOTINO | XFS_SB_PQUOTINO | XFS_SB_QFLAGS)) ==
- (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
- XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
- XFS_SB_QFLAGS));
xfs_sb_version_addquota(&mp->m_sb);
mp->m_sb.sb_uquotino = NULLFSINO;
@@ -800,7 +794,7 @@ xfs_qm_qino_alloc(
else
mp->m_sb.sb_pquotino = (*ip)->i_ino;
spin_unlock(&mp->m_sb_lock);
- xfs_mod_sb(tp, sbfields);
+ xfs_mod_sb(tp);
if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
xfs_alert(mp, "%s failed (error %d)!", __func__, error);
@@ -1453,7 +1447,7 @@ xfs_qm_mount_quotas(
spin_unlock(&mp->m_sb_lock);
if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
- if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
+ if (xfs_qm_write_sb_changes(mp)) {
/*
* We could only have been turning quotas off.
* We aren't in very good shape actually because
@@ -1484,7 +1478,6 @@ xfs_qm_init_quotainos(
struct xfs_inode *gip = NULL;
struct xfs_inode *pip = NULL;
int error;
- __int64_t sbflags = 0;
uint flags = 0;
ASSERT(mp->m_quotainfo);
@@ -1519,9 +1512,6 @@ xfs_qm_init_quotainos(
}
} else {
flags |= XFS_QMOPT_SBVERSION;
- sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
- XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
- XFS_SB_QFLAGS);
}
/*
@@ -1532,7 +1522,6 @@ xfs_qm_init_quotainos(
*/
if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
error = xfs_qm_qino_alloc(mp, &uip,
- sbflags | XFS_SB_UQUOTINO,
flags | XFS_QMOPT_UQUOTA);
if (error)
goto error_rele;
@@ -1541,7 +1530,6 @@ xfs_qm_init_quotainos(
}
if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
error = xfs_qm_qino_alloc(mp, &gip,
- sbflags | XFS_SB_GQUOTINO,
flags | XFS_QMOPT_GQUOTA);
if (error)
goto error_rele;
@@ -1550,7 +1538,6 @@ xfs_qm_init_quotainos(
}
if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
error = xfs_qm_qino_alloc(mp, &pip,
- sbflags | XFS_SB_PQUOTINO,
flags | XFS_QMOPT_PQUOTA);
if (error)
goto error_rele;
@@ -1595,8 +1582,7 @@ xfs_qm_dqfree_one(
*/
int
xfs_qm_write_sb_changes(
- xfs_mount_t *mp,
- __int64_t flags)
+ struct xfs_mount *mp)
{
xfs_trans_t *tp;
int error;
@@ -1608,10 +1594,8 @@ xfs_qm_write_sb_changes(
return error;
}
- xfs_mod_sb(tp, flags);
- error = xfs_trans_commit(tp, 0);
-
- return error;
+ xfs_mod_sb(tp);
+ return xfs_trans_commit(tp, 0);
}
diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h
index 3a07a93..bddd23f 100644
--- a/fs/xfs/xfs_qm.h
+++ b/fs/xfs/xfs_qm.h
@@ -157,7 +157,7 @@ struct xfs_dquot_acct {
#define XFS_QM_RTBWARNLIMIT 5
extern void xfs_qm_destroy_quotainfo(struct xfs_mount *);
-extern int xfs_qm_write_sb_changes(struct xfs_mount *, __int64_t);
+extern int xfs_qm_write_sb_changes(struct xfs_mount *);
/* dquot stuff */
extern void xfs_qm_dqpurge_all(struct xfs_mount *, uint);
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index 80f2d77..45f28f1 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -93,8 +93,7 @@ xfs_qm_scall_quotaoff(
mutex_unlock(&q->qi_quotaofflock);
/* XXX what to do if error ? Revert back to old vals incore ? */
- error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
- return error;
+ return xfs_qm_write_sb_changes(mp);
}
dqtype = 0;
@@ -315,7 +314,6 @@ xfs_qm_scall_quotaon(
{
int error;
uint qf;
- __int64_t sbflags;
flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
/*
@@ -323,8 +321,6 @@ xfs_qm_scall_quotaon(
*/
flags &= ~(XFS_ALL_QUOTA_ACCT);
- sbflags = 0;
-
if (flags == 0) {
xfs_debug(mp, "%s: zero flags, m_qflags=%x",
__func__, mp->m_qflags);
@@ -371,11 +367,10 @@ xfs_qm_scall_quotaon(
/*
* There's nothing to change if it's the same.
*/
- if ((qf & flags) == flags && sbflags == 0)
+ if ((qf & flags) == flags)
return -EEXIST;
- sbflags |= XFS_SB_QFLAGS;
- if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
+ if ((error = xfs_qm_write_sb_changes(mp)))
return error;
/*
* If we aren't trying to switch on quota enforcement, we are done.
@@ -800,7 +795,7 @@ xfs_qm_log_quotaoff(
mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
spin_unlock(&mp->m_sb_lock);
- xfs_mod_sb(tp, XFS_SB_QFLAGS);
+ xfs_mod_sb(tp);
/*
* We have to make sure that the transaction is secure on disk before we
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 9f622fe..a7d2def 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1255,7 +1255,7 @@ xfs_fs_remount(
* might have some superblock changes to update.
*/
if (mp->m_update_flags) {
- error = xfs_mount_log_sb(mp, mp->m_update_flags);
+ error = xfs_mount_log_sb(mp);
if (error) {
xfs_warn(mp, "failed to write sb changes");
return error;
--
2.0.0
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^ permalink raw reply related [flat|nested] 13+ messages in thread* [PATCH 3/3] xfs: consolidate superblock logging functions
2014-09-25 12:20 [PATCH 0/3 v2] xfs: superblock logging rework Dave Chinner
2014-09-25 12:20 ` [PATCH 1/3] xfs: consider freeze levels in xfs_fs_writable() Dave Chinner
2014-09-25 12:20 ` [PATCH 2/3] xfs: remove bitfield based superblock updates Dave Chinner
@ 2014-09-25 12:20 ` Dave Chinner
2014-09-29 13:20 ` Brian Foster
2 siblings, 1 reply; 13+ messages in thread
From: Dave Chinner @ 2014-09-25 12:20 UTC (permalink / raw)
To: xfs
From: Dave Chinner <dchinner@redhat.com>
We now have several superblock loggin functions that are identical
except for the transaction reservation and whether it shoul dbe a
synchronous transaction or not. Consolidate these all into a single
function, a single reserveration and a sync flag and call it
xfs_sync_sb().
Also, xfs_mod_sb() is not really a modification function - it's the
operation of logging the superblock buffer. hence change the name of
it to reflect this.
Note that we have to change the mp->m_update_flags that are passed
around at mount time to a boolean simply to indicate a superblock
update is needed.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
fs/xfs/libxfs/xfs_attr_leaf.c | 2 +-
fs/xfs/libxfs/xfs_bmap.c | 10 +++---
fs/xfs/libxfs/xfs_sb.c | 43 +++++++++++++++++++----
fs/xfs/libxfs/xfs_sb.h | 42 ++---------------------
fs/xfs/libxfs/xfs_shared.h | 26 ++++++--------
fs/xfs/libxfs/xfs_trans_resv.c | 14 --------
fs/xfs/libxfs/xfs_trans_resv.h | 1 -
fs/xfs/xfs_fsops.c | 29 ----------------
fs/xfs/xfs_log.c | 17 ++++++++--
fs/xfs/xfs_mount.c | 77 ++++++------------------------------------
fs/xfs/xfs_mount.h | 3 +-
fs/xfs/xfs_qm.c | 27 ++-------------
fs/xfs/xfs_qm_syscalls.c | 7 ++--
fs/xfs/xfs_super.c | 13 +++----
14 files changed, 95 insertions(+), 216 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
index f4a47a7..bcb0ab1 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -405,7 +405,7 @@ xfs_sbversion_add_attr2(xfs_mount_t *mp, xfs_trans_t *tp)
if (!xfs_sb_version_hasattr2(&mp->m_sb)) {
xfs_sb_version_addattr2(&mp->m_sb);
spin_unlock(&mp->m_sb_lock);
- xfs_mod_sb(tp);
+ xfs_log_sb(tp);
} else
spin_unlock(&mp->m_sb_lock);
}
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index e33a780..d40be66 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -1224,20 +1224,20 @@ xfs_bmap_add_attrfork(
goto bmap_cancel;
if (!xfs_sb_version_hasattr(&mp->m_sb) ||
(!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) {
- bool mod_sb = false;
+ bool log_sb = false;
spin_lock(&mp->m_sb_lock);
if (!xfs_sb_version_hasattr(&mp->m_sb)) {
xfs_sb_version_addattr(&mp->m_sb);
- mod_sb = true;
+ log_sb = true;
}
if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) {
xfs_sb_version_addattr2(&mp->m_sb);
- mod_sb = true;
+ log_sb = true;
}
spin_unlock(&mp->m_sb_lock);
- if (mod_sb)
- xfs_mod_sb(tp);
+ if (log_sb)
+ xfs_log_sb(tp);
}
error = xfs_bmap_finish(&tp, &flist, &committed);
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 2803325..b5ffbe4 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -744,14 +744,13 @@ xfs_initialize_perag_data(
}
/*
- * xfs_mod_sb() can be used to copy arbitrary changes to the
- * in-core superblock into the superblock buffer to be logged.
- * It does not provide the higher level of locking that is
- * needed to protect the in-core superblock from concurrent
- * access.
+ * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock
+ * into the superblock buffer to be logged. It does not provide the higher
+ * level of locking that is needed to protect the in-core superblock from
+ * concurrent access.
*/
void
-xfs_mod_sb(
+xfs_log_sb(
struct xfs_trans *tp)
{
struct xfs_mount *mp = tp->t_mountp;
@@ -761,3 +760,35 @@ xfs_mod_sb(
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb));
}
+
+/*
+ * xfs_sync_sb
+ *
+ * Sync the superblock to disk.
+ *
+ * Note that the caller is responsible for checking the frozen state of the
+ * filesystem. This procedure uses the non-blocking transaction allocator and
+ * thus will allow modifications to a frozen fs. This is required because this
+ * code can be called during the process of freezing where use of the high-level
+ * allocator would deadlock.
+ */
+int
+xfs_sync_sb(
+ struct xfs_mount *mp,
+ bool wait)
+{
+ struct xfs_trans *tp;
+ int error;
+
+ tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_CHANGE, KM_SLEEP);
+ error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0);
+ if (error) {
+ xfs_trans_cancel(tp, 0);
+ return error;
+ }
+
+ xfs_log_sb(tp);
+ if (wait)
+ xfs_trans_set_sync(tp);
+ return xfs_trans_commit(tp, 0);
+}
diff --git a/fs/xfs/libxfs/xfs_sb.h b/fs/xfs/libxfs/xfs_sb.h
index c28b3c1..73dff28 100644
--- a/fs/xfs/libxfs/xfs_sb.h
+++ b/fs/xfs/libxfs/xfs_sb.h
@@ -274,45 +274,6 @@ typedef enum {
XFS_SBS_FIELDCOUNT
} xfs_sb_field_t;
-/*
- * Mask values, defined based on the xfs_sb_field_t values.
- * Only define the ones we're using.
- */
-#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
-#define XFS_SB_UUID XFS_SB_MVAL(UUID)
-#define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
-#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
-#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
-#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
-#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
-#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
-#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
-#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
-#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
-#define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
-#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
-#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
-#define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
-#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
-#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
-#define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
-#define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT)
-#define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
-#define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
-#define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT)
-#define XFS_SB_CRC XFS_SB_MVAL(CRC)
-#define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO)
-#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
-#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
-#define XFS_SB_MOD_BITS \
- (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
- XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
- XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
- XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
- XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
- XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \
- XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO)
-
/*
* Misc. Flags - warning - these will be cleared by xfs_repair unless
@@ -612,7 +573,8 @@ extern void xfs_perag_put(struct xfs_perag *pag);
extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
extern void xfs_sb_calc_crc(struct xfs_buf *bp);
-extern void xfs_mod_sb(struct xfs_trans *tp);
+extern void xfs_log_sb(struct xfs_trans *tp);
+extern int xfs_sync_sb(struct xfs_mount *mp, bool wait);
extern void xfs_sb_mount_common(struct xfs_mount *mp, struct xfs_sb *sbp);
extern void xfs_sb_from_disk(struct xfs_sb *to, struct xfs_dsb *from);
extern void xfs_sb_to_disk(struct xfs_dsb *to, struct xfs_sb *from);
diff --git a/fs/xfs/libxfs/xfs_shared.h b/fs/xfs/libxfs/xfs_shared.h
index 82404da..4ae617a 100644
--- a/fs/xfs/libxfs/xfs_shared.h
+++ b/fs/xfs/libxfs/xfs_shared.h
@@ -82,7 +82,7 @@ extern const struct xfs_buf_ops xfs_symlink_buf_ops;
#define XFS_TRANS_ATTR_RM 23
#define XFS_TRANS_ATTR_FLAG 24
#define XFS_TRANS_CLEAR_AGI_BUCKET 25
-#define XFS_TRANS_QM_SBCHANGE 26
+#define XFS_TRANS_SB_CHANGE 26
/*
* Dummy entries since we use the transaction type to index into the
* trans_type[] in xlog_recover_print_trans_head()
@@ -95,17 +95,15 @@ extern const struct xfs_buf_ops xfs_symlink_buf_ops;
#define XFS_TRANS_QM_DQCLUSTER 32
#define XFS_TRANS_QM_QINOCREATE 33
#define XFS_TRANS_QM_QUOTAOFF_END 34
-#define XFS_TRANS_SB_UNIT 35
-#define XFS_TRANS_FSYNC_TS 36
-#define XFS_TRANS_GROWFSRT_ALLOC 37
-#define XFS_TRANS_GROWFSRT_ZERO 38
-#define XFS_TRANS_GROWFSRT_FREE 39
-#define XFS_TRANS_SWAPEXT 40
-#define XFS_TRANS_SB_COUNT 41
-#define XFS_TRANS_CHECKPOINT 42
-#define XFS_TRANS_ICREATE 43
-#define XFS_TRANS_CREATE_TMPFILE 44
-#define XFS_TRANS_TYPE_MAX 44
+#define XFS_TRANS_FSYNC_TS 35
+#define XFS_TRANS_GROWFSRT_ALLOC 36
+#define XFS_TRANS_GROWFSRT_ZERO 37
+#define XFS_TRANS_GROWFSRT_FREE 37
+#define XFS_TRANS_SWAPEXT 39
+#define XFS_TRANS_CHECKPOINT 40
+#define XFS_TRANS_ICREATE 41
+#define XFS_TRANS_CREATE_TMPFILE 42
+#define XFS_TRANS_TYPE_MAX 43
/* new transaction types need to be reflected in xfs_logprint(8) */
#define XFS_TRANS_TYPES \
@@ -134,20 +132,18 @@ extern const struct xfs_buf_ops xfs_symlink_buf_ops;
{ XFS_TRANS_ATTR_RM, "ATTR_RM" }, \
{ XFS_TRANS_ATTR_FLAG, "ATTR_FLAG" }, \
{ XFS_TRANS_CLEAR_AGI_BUCKET, "CLEAR_AGI_BUCKET" }, \
- { XFS_TRANS_QM_SBCHANGE, "QM_SBCHANGE" }, \
+ { XFS_TRANS_SB_CHANGE, "SBCHANGE" }, \
{ XFS_TRANS_QM_QUOTAOFF, "QM_QUOTAOFF" }, \
{ XFS_TRANS_QM_DQALLOC, "QM_DQALLOC" }, \
{ XFS_TRANS_QM_SETQLIM, "QM_SETQLIM" }, \
{ XFS_TRANS_QM_DQCLUSTER, "QM_DQCLUSTER" }, \
{ XFS_TRANS_QM_QINOCREATE, "QM_QINOCREATE" }, \
{ XFS_TRANS_QM_QUOTAOFF_END, "QM_QOFF_END" }, \
- { XFS_TRANS_SB_UNIT, "SB_UNIT" }, \
{ XFS_TRANS_FSYNC_TS, "FSYNC_TS" }, \
{ XFS_TRANS_GROWFSRT_ALLOC, "GROWFSRT_ALLOC" }, \
{ XFS_TRANS_GROWFSRT_ZERO, "GROWFSRT_ZERO" }, \
{ XFS_TRANS_GROWFSRT_FREE, "GROWFSRT_FREE" }, \
{ XFS_TRANS_SWAPEXT, "SWAPEXT" }, \
- { XFS_TRANS_SB_COUNT, "SB_COUNT" }, \
{ XFS_TRANS_CHECKPOINT, "CHECKPOINT" }, \
{ XFS_TRANS_DUMMY1, "DUMMY1" }, \
{ XFS_TRANS_DUMMY2, "DUMMY2" }, \
diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c
index f2bda7c..7c42e2c 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.c
+++ b/fs/xfs/libxfs/xfs_trans_resv.c
@@ -718,17 +718,6 @@ xfs_calc_clear_agi_bucket_reservation(
}
/*
- * Clearing the quotaflags in the superblock.
- * the super block for changing quota flags: sector size
- */
-STATIC uint
-xfs_calc_qm_sbchange_reservation(
- struct xfs_mount *mp)
-{
- return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
-}
-
-/*
* Adjusting quota limits.
* the xfs_disk_dquot_t: sizeof(struct xfs_disk_dquot)
*/
@@ -866,9 +855,6 @@ xfs_trans_resv_calc(
* The following transactions are logged in logical format with
* a default log count.
*/
- resp->tr_qm_sbchange.tr_logres = xfs_calc_qm_sbchange_reservation(mp);
- resp->tr_qm_sbchange.tr_logcount = XFS_DEFAULT_LOG_COUNT;
-
resp->tr_qm_setqlim.tr_logres = xfs_calc_qm_setqlim_reservation(mp);
resp->tr_qm_setqlim.tr_logcount = XFS_DEFAULT_LOG_COUNT;
diff --git a/fs/xfs/libxfs/xfs_trans_resv.h b/fs/xfs/libxfs/xfs_trans_resv.h
index 1097d14..2d5bdfc 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.h
+++ b/fs/xfs/libxfs/xfs_trans_resv.h
@@ -56,7 +56,6 @@ struct xfs_trans_resv {
struct xfs_trans_res tr_growrtalloc; /* grow realtime allocations */
struct xfs_trans_res tr_growrtzero; /* grow realtime zeroing */
struct xfs_trans_res tr_growrtfree; /* grow realtime freeing */
- struct xfs_trans_res tr_qm_sbchange; /* change quota flags */
struct xfs_trans_res tr_qm_setqlim; /* adjust quota limits */
struct xfs_trans_res tr_qm_dqalloc; /* allocate quota on disk */
struct xfs_trans_res tr_qm_quotaoff; /* turn quota off */
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 2c44e0b..126b4b3 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -763,35 +763,6 @@ out:
return 0;
}
-/*
- * Dump a transaction into the log that contains no real change. This is needed
- * to be able to make the log dirty or stamp the current tail LSN into the log
- * during the covering operation.
- *
- * We cannot use an inode here for this - that will push dirty state back up
- * into the VFS and then periodic inode flushing will prevent log covering from
- * making progress. Hence we log a field in the superblock instead and use a
- * synchronous transaction to ensure the superblock is immediately unpinned
- * and can be written back.
- */
-int
-xfs_fs_log_dummy(
- xfs_mount_t *mp)
-{
- xfs_trans_t *tp;
- int error;
-
- tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP);
- error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0);
- if (error) {
- xfs_trans_cancel(tp, 0);
- return error;
- }
- xfs_mod_sb(tp);
- xfs_trans_set_sync(tp);
- return xfs_trans_commit(tp, 0);
-}
-
int
xfs_fs_goingdown(
xfs_mount_t *mp,
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 7ada70c..b1131fe 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1292,9 +1292,20 @@ xfs_log_worker(
struct xfs_mount *mp = log->l_mp;
/* dgc: errors ignored - not fatal and nowhere to report them */
- if (xfs_log_need_covered(mp))
- xfs_fs_log_dummy(mp);
- else
+ if (xfs_log_need_covered(mp)) {
+ /*
+ * Dump a transaction into the log that contains no real change.
+ * This is needed stamp the current tail LSN into the log during
+ * the covering operation.
+ *
+ * We cannot use an inode here for this - that will push dirty
+ * state back up into the VFS and then periodic inode flushing
+ * will prevent log covering from making progress. Hence we
+ * synchronously log the superblock instead to ensure the
+ * superblock is immediately unpinned and can be written back.
+ */
+ xfs_sync_sb(mp, true);
+ } else
xfs_log_force(mp, 0);
/* start pushing all the metadata that is currently dirty */
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index e555411..78a2799 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -416,11 +416,11 @@ xfs_update_alignment(xfs_mount_t *mp)
if (xfs_sb_version_hasdalign(sbp)) {
if (sbp->sb_unit != mp->m_dalign) {
sbp->sb_unit = mp->m_dalign;
- mp->m_update_flags |= XFS_SB_UNIT;
+ mp->m_update_sb = true;
}
if (sbp->sb_width != mp->m_swidth) {
sbp->sb_width = mp->m_swidth;
- mp->m_update_flags |= XFS_SB_WIDTH;
+ mp->m_update_sb = true;
}
} else {
xfs_warn(mp,
@@ -588,38 +588,18 @@ int
xfs_mount_reset_sbqflags(
struct xfs_mount *mp)
{
- int error;
- struct xfs_trans *tp;
-
mp->m_qflags = 0;
- /*
- * It is OK to look at sb_qflags here in mount path,
- * without m_sb_lock.
- */
+ /* It is OK to look at sb_qflags in the mount path without m_sb_lock. */
if (mp->m_sb.sb_qflags == 0)
return 0;
spin_lock(&mp->m_sb_lock);
mp->m_sb.sb_qflags = 0;
spin_unlock(&mp->m_sb_lock);
- /*
- * If the fs is readonly, let the incore superblock run
- * with quotas off but don't flush the update out to disk
- */
if (!xfs_fs_writable(mp, SB_UNFROZEN))
return 0;
-
- tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
- error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0);
- if (error) {
- xfs_trans_cancel(tp, 0);
- xfs_alert(mp, "%s: Superblock update failed!", __func__);
- return error;
- }
-
- xfs_mod_sb(tp);
- return xfs_trans_commit(tp, 0);
+ return xfs_sync_sb(mp, false);
}
__uint64_t
@@ -683,7 +663,7 @@ xfs_mountfs(
xfs_warn(mp, "correcting sb_features alignment problem");
sbp->sb_features2 |= sbp->sb_bad_features2;
sbp->sb_bad_features2 = sbp->sb_features2;
- mp->m_update_flags |= XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2;
+ mp->m_update_sb = true;
/*
* Re-check for ATTR2 in case it was found in bad_features2
@@ -697,17 +677,17 @@ xfs_mountfs(
if (xfs_sb_version_hasattr2(&mp->m_sb) &&
(mp->m_flags & XFS_MOUNT_NOATTR2)) {
xfs_sb_version_removeattr2(&mp->m_sb);
- mp->m_update_flags |= XFS_SB_FEATURES2;
+ mp->m_update_sb = true;
/* update sb_versionnum for the clearing of the morebits */
if (!sbp->sb_features2)
- mp->m_update_flags |= XFS_SB_VERSIONNUM;
+ mp->m_update_sb = true;
}
/* always use v2 inodes by default now */
if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) {
mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
- mp->m_update_flags |= XFS_SB_VERSIONNUM;
+ mp->m_update_sb = true;
}
/*
@@ -900,8 +880,8 @@ xfs_mountfs(
* the next remount into writeable mode. Otherwise we would never
* perform the update e.g. for the root filesystem.
*/
- if (mp->m_update_flags && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
- error = xfs_mount_log_sb(mp);
+ if (mp->m_update_sb && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
+ error = xfs_sync_sb(mp, false);
if (error) {
xfs_warn(mp, "failed to write sb changes");
goto out_rtunmount;
@@ -1101,9 +1081,6 @@ xfs_fs_writable(xfs_mount_t *mp, int frozen_state)
int
xfs_log_sbcount(xfs_mount_t *mp)
{
- xfs_trans_t *tp;
- int error;
-
/*
* We can be called during the fs freeze process, and we need to be
* able to write the superblock in that case.
@@ -1120,17 +1097,7 @@ xfs_log_sbcount(xfs_mount_t *mp)
if (!xfs_sb_version_haslazysbcount(&mp->m_sb))
return 0;
- tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_COUNT, KM_SLEEP);
- error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0);
- if (error) {
- xfs_trans_cancel(tp, 0);
- return error;
- }
-
- xfs_mod_sb(tp);
- xfs_trans_set_sync(tp);
- error = xfs_trans_commit(tp, 0);
- return error;
+ return xfs_sync_sb(mp, true);
}
/*
@@ -1424,28 +1391,6 @@ xfs_freesb(
}
/*
- * Used to log changes to the superblock unit and width fields which could
- * be altered by the mount options, as well as any potential sb_features2
- * fixup. Only the first superblock is updated.
- */
-int
-xfs_mount_log_sb(
- xfs_mount_t *mp)
-{
- xfs_trans_t *tp;
- int error;
-
- tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT);
- error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0);
- if (error) {
- xfs_trans_cancel(tp, 0);
- return error;
- }
- xfs_mod_sb(tp);
- return xfs_trans_commit(tp, 0);
-}
-
-/*
* If the underlying (data/log/rt) device is readonly, there are some
* operations that cannot proceed.
*/
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 01f66e5..06f16d5 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -162,8 +162,7 @@ typedef struct xfs_mount {
struct delayed_work m_reclaim_work; /* background inode reclaim */
struct delayed_work m_eofblocks_work; /* background eof blocks
trimming */
- __int64_t m_update_flags; /* sb flags we need to update
- on the next remount,rw */
+ bool m_update_sb; /* sb needs update in mount */
int64_t m_low_space[XFS_LOWSP_MAX];
/* low free space thresholds */
struct xfs_kobj m_kobj;
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 1691edb..bfb017d 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -794,7 +794,7 @@ xfs_qm_qino_alloc(
else
mp->m_sb.sb_pquotino = (*ip)->i_ino;
spin_unlock(&mp->m_sb_lock);
- xfs_mod_sb(tp);
+ xfs_log_sb(tp);
if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
xfs_alert(mp, "%s failed (error %d)!", __func__, error);
@@ -1447,7 +1447,7 @@ xfs_qm_mount_quotas(
spin_unlock(&mp->m_sb_lock);
if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
- if (xfs_qm_write_sb_changes(mp)) {
+ if (xfs_sync_sb(mp, false)) {
/*
* We could only have been turning quotas off.
* We aren't in very good shape actually because
@@ -1576,29 +1576,6 @@ xfs_qm_dqfree_one(
xfs_qm_dqdestroy(dqp);
}
-/*
- * Start a transaction and write the incore superblock changes to
- * disk. flags parameter indicates which fields have changed.
- */
-int
-xfs_qm_write_sb_changes(
- struct xfs_mount *mp)
-{
- xfs_trans_t *tp;
- int error;
-
- tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
- error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0);
- if (error) {
- xfs_trans_cancel(tp, 0);
- return error;
- }
-
- xfs_mod_sb(tp);
- return xfs_trans_commit(tp, 0);
-}
-
-
/* --------------- utility functions for vnodeops ---------------- */
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index 45f28f1..d558306 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -93,7 +93,7 @@ xfs_qm_scall_quotaoff(
mutex_unlock(&q->qi_quotaofflock);
/* XXX what to do if error ? Revert back to old vals incore ? */
- return xfs_qm_write_sb_changes(mp);
+ return xfs_sync_sb(mp, false);
}
dqtype = 0;
@@ -370,7 +370,8 @@ xfs_qm_scall_quotaon(
if ((qf & flags) == flags)
return -EEXIST;
- if ((error = xfs_qm_write_sb_changes(mp)))
+ error = xfs_sync_sb(mp, false);
+ if (error)
return error;
/*
* If we aren't trying to switch on quota enforcement, we are done.
@@ -795,7 +796,7 @@ xfs_qm_log_quotaoff(
mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
spin_unlock(&mp->m_sb_lock);
- xfs_mod_sb(tp);
+ xfs_log_sb(tp);
/*
* We have to make sure that the transaction is secure on disk before we
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index a7d2def..d018f65 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1254,13 +1254,13 @@ xfs_fs_remount(
* If this is the first remount to writeable state we
* might have some superblock changes to update.
*/
- if (mp->m_update_flags) {
- error = xfs_mount_log_sb(mp);
+ if (mp->m_update_sb) {
+ error = xfs_sync_sb(mp, false);
if (error) {
xfs_warn(mp, "failed to write sb changes");
return error;
}
- mp->m_update_flags = 0;
+ mp->m_update_sb = false;
}
/*
@@ -1290,8 +1290,9 @@ xfs_fs_remount(
/*
* Second stage of a freeze. The data is already frozen so we only
- * need to take care of the metadata. Once that's done write a dummy
- * record to dirty the log in case of a crash while frozen.
+ * need to take care of the metadata. Once that's done sync the superblock
+ * to the log to dirty it in case of a crash while frozen. This ensures that we
+ * will recover the unlinked inode lists on the next mount.
*/
STATIC int
xfs_fs_freeze(
@@ -1301,7 +1302,7 @@ xfs_fs_freeze(
xfs_save_resvblks(mp);
xfs_quiesce_attr(mp);
- return xfs_fs_log_dummy(mp);
+ return xfs_sync_sb(mp, true);
}
STATIC int
--
2.0.0
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