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[XFS] Unwrap XFS_SB_LOCK.

Browse Source 
Un-obfuscate XFS_SB_LOCK, remove XFS_SB_LOCK->mutex_lock->spin_lock
macros, call spin_lock directly, remove extraneous cookie holdover from
old xfs code, and change lock type to spinlock_t.

SGI-PV: 970382
SGI-Modid: xfs-linux-melb:xfs-kern:29746a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Donald Douwsma <donaldd@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
This commit is contained in:
Eric Sandeen 2007-10-11 17:42:32 +10:00 committed by Lachlan McIlroy
parent ba74d0cba5
commit 3685c2a1d7
10 changed files with 60 additions and 79 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
fs/xfs/quota/xfs_qm.c
View File

@ -310,7 +310,6 @@ xfs_qm_mount_quotas(
xfs_mount_t *mp,
int mfsi_flags)
{
unsigned long s;
int error = 0;
uint sbf;
@ -367,13 +366,13 @@ xfs_qm_mount_quotas(
write_changes:
/*
* We actually don't have to acquire the SB_LOCK at all.
* We actually don't have to acquire the m_sb_lock at all.
* This can only be called from mount, and that's single threaded. XXX
*/
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
sbf = mp->m_sb.sb_qflags;
mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
XFS_SB_UNLOCK(mp, s);
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)) {
@ -1370,7 +1369,6 @@ xfs_qm_qino_alloc(
{
xfs_trans_t *tp;
int error;
unsigned long s;
int committed;
tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
@ -1402,7 +1400,7 @@ xfs_qm_qino_alloc(
* sbfields arg may contain fields other than *QUOTINO;
* VERSIONNUM for example.
*/
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
if (flags & XFS_QMOPT_SBVERSION) {
#if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
unsigned oldv = mp->m_sb.sb_versionnum;
@ -1429,7 +1427,7 @@ xfs_qm_qino_alloc(
mp->m_sb.sb_uquotino = (*ip)->i_ino;
else
mp->m_sb.sb_gquotino = (*ip)->i_ino;
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
xfs_mod_sb(tp, sbfields);
if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {

19
fs/xfs/quota/xfs_qm_syscalls.c
View File

@ -200,7 +200,6 @@ xfs_qm_scall_quotaoff(
boolean_t force)
{
uint dqtype;
unsigned long s;
int error;
uint inactivate_flags;
xfs_qoff_logitem_t *qoffstart;
@ -237,9 +236,9 @@ xfs_qm_scall_quotaoff(
if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
mp->m_qflags &= ~(flags);
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
mp->m_sb.sb_qflags = mp->m_qflags;
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
/* XXX what to do if error ? Revert back to old vals incore ? */
@ -415,7 +414,6 @@ xfs_qm_scall_quotaon(
uint flags)
{
int error;
unsigned long s;
uint qf;
uint accflags;
__int64_t sbflags;
@ -468,10 +466,10 @@ xfs_qm_scall_quotaon(
* Change sb_qflags on disk but not incore mp->qflags
* if this is the root filesystem.
*/
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
qf = mp->m_sb.sb_qflags;
mp->m_sb.sb_qflags = qf | flags;
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
/*
* There's nothing to change if it's the same.
@ -815,7 +813,6 @@ xfs_qm_log_quotaoff(
{
xfs_trans_t *tp;
int error;
unsigned long s;
xfs_qoff_logitem_t *qoffi=NULL;
uint oldsbqflag=0;
@ -832,10 +829,10 @@ xfs_qm_log_quotaoff(
qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
xfs_trans_log_quotaoff_item(tp, qoffi);
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
oldsbqflag = mp->m_sb.sb_qflags;
mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
xfs_mod_sb(tp, XFS_SB_QFLAGS);
@ -854,9 +851,9 @@ error0:
* No one else is modifying sb_qflags, so this is OK.
* We still hold the quotaofflock.
*/
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
mp->m_sb.sb_qflags = oldsbqflag;
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
}
*qoffstartp = qoffi;
return (error);

8
fs/xfs/xfs_attr_leaf.c
View File

@ -226,17 +226,15 @@ xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes)
STATIC void
xfs_sbversion_add_attr2(xfs_mount_t *mp, xfs_trans_t *tp)
{
unsigned long s;
if ((mp->m_flags & XFS_MOUNT_ATTR2) &&
!(XFS_SB_VERSION_HASATTR2(&mp->m_sb))) {
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
if (!XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
XFS_SB_VERSION_ADDATTR2(&mp->m_sb);
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
xfs_mod_sb(tp, XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
} else
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
}
}

7
fs/xfs/xfs_bmap.c
View File

@ -3956,7 +3956,6 @@ xfs_bmap_add_attrfork(
xfs_bmap_free_t flist; /* freed extent records */
xfs_mount_t *mp; /* mount structure */
xfs_trans_t *tp; /* transaction pointer */
unsigned long s; /* spinlock spl value */
int blks; /* space reservation */
int version = 1; /* superblock attr version */
int committed; /* xaction was committed */
@ -4053,7 +4052,7 @@ xfs_bmap_add_attrfork(
(!XFS_SB_VERSION_HASATTR2(&mp->m_sb) && version == 2)) {
__int64_t sbfields = 0;
s = XFS_SB_LOCK(mp);
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;
@ -4063,10 +4062,10 @@ xfs_bmap_add_attrfork(
sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
}
if (sbfields) {
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
xfs_mod_sb(tp, sbfields);
} else
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
}
if ((error = xfs_bmap_finish(&tp, &flist, &committed)))
goto error2;

13
fs/xfs/xfs_fsops.c
View File

@ -462,15 +462,13 @@ xfs_fs_counts(
xfs_mount_t *mp,
xfs_fsop_counts_t *cnt)
{
unsigned long s;
xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT);
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
cnt->freertx = mp->m_sb.sb_frextents;
cnt->freeino = mp->m_sb.sb_ifree;
cnt->allocino = mp->m_sb.sb_icount;
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
return 0;
}
@ -497,7 +495,6 @@ xfs_reserve_blocks(
{
__int64_t lcounter, delta, fdblks_delta;
__uint64_t request;
unsigned long s;
/* If inval is null, report current values and return */
if (inval == (__uint64_t *)NULL) {
@ -515,7 +512,7 @@ xfs_reserve_blocks(
* problem. we needto work out if we are freeing or allocation
* blocks first, then we can do the modification as necessary.
*
* We do this under the XFS_SB_LOCK so that if we are near
* We do this under the m_sb_lock so that if we are near
* ENOSPC, we will hold out any changes while we work out
* what to do. This means that the amount of free space can
* change while we do this, so we need to retry if we end up
@ -526,7 +523,7 @@ xfs_reserve_blocks(
* enabled, disabled or even compiled in....
*/
retry:
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
xfs_icsb_sync_counters_flags(mp, XFS_ICSB_SB_LOCKED);
/*
@ -569,7 +566,7 @@ out:
outval->resblks = mp->m_resblks;
outval->resblks_avail = mp->m_resblks_avail;
}
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
if (fdblks_delta) {
/*

57
fs/xfs/xfs_mount.c
View File

@ -696,7 +696,6 @@ xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount)
uint64_t bfreelst = 0;
uint64_t btree = 0;
int error;
int s;
for (index = 0; index < agcount; index++) {
/*
@ -721,11 +720,11 @@ xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount)
/*
* Overwrite incore superblock counters with just-read data
*/
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
sbp->sb_ifree = ifree;
sbp->sb_icount = ialloc;
sbp->sb_fdblocks = bfree + bfreelst + btree;
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
/* Fixup the per-cpu counters as well. */
xfs_icsb_reinit_counters(mp);
@ -1440,7 +1439,7 @@ xfs_mod_sb(xfs_trans_t *tp, __int64_t fields)
* Fields are not allowed to dip below zero, so if the delta would
* do this do not apply it and return EINVAL.
*
* The SB_LOCK must be held when this routine is called.
* The m_sb_lock must be held when this routine is called.
*/
int
xfs_mod_incore_sb_unlocked(
@ -1605,7 +1604,7 @@ xfs_mod_incore_sb_unlocked(
/*
* xfs_mod_incore_sb() is used to change a field in the in-core
* superblock structure by the specified delta. This modification
* is protected by the SB_LOCK. Just use the xfs_mod_incore_sb_unlocked()
* is protected by the m_sb_lock. Just use the xfs_mod_incore_sb_unlocked()
* routine to do the work.
*/
int
@ -1615,7 +1614,6 @@ xfs_mod_incore_sb(
int64_t delta,
int rsvd)
{
unsigned long s;
int status;
/* check for per-cpu counters */
@ -1632,9 +1630,9 @@ xfs_mod_incore_sb(
/* FALLTHROUGH */
#endif
default:
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd);
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
break;
}
@ -1655,7 +1653,6 @@ xfs_mod_incore_sb(
int
xfs_mod_incore_sb_batch(xfs_mount_t *mp, xfs_mod_sb_t *msb, uint nmsb, int rsvd)
{
unsigned long s;
int status=0;
xfs_mod_sb_t *msbp;
@ -1663,10 +1660,10 @@ xfs_mod_incore_sb_batch(xfs_mount_t *mp, xfs_mod_sb_t *msb, uint nmsb, int rsvd)
* Loop through the array of mod structures and apply each
* individually. If any fail, then back out all those
* which have already been applied. Do all of this within
* the scope of the SB_LOCK so that all of the changes will
* the scope of the m_sb_lock so that all of the changes will
* be atomic.
*/
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
msbp = &msb[0];
for (msbp = &msbp[0]; msbp < (msb + nmsb); msbp++) {
/*
@ -1680,11 +1677,11 @@ xfs_mod_incore_sb_batch(xfs_mount_t *mp, xfs_mod_sb_t *msb, uint nmsb, int rsvd)
case XFS_SBS_IFREE:
case XFS_SBS_FDBLOCKS:
if (!(mp->m_flags & XFS_MOUNT_NO_PERCPU_SB)) {
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
status = xfs_icsb_modify_counters(mp,
msbp->msb_field,
msbp->msb_delta, rsvd);
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
break;
}
/* FALLTHROUGH */
@ -1718,12 +1715,12 @@ xfs_mod_incore_sb_batch(xfs_mount_t *mp, xfs_mod_sb_t *msb, uint nmsb, int rsvd)
case XFS_SBS_IFREE:
case XFS_SBS_FDBLOCKS:
if (!(mp->m_flags & XFS_MOUNT_NO_PERCPU_SB)) {
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
status = xfs_icsb_modify_counters(mp,
msbp->msb_field,
-(msbp->msb_delta),
rsvd);
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
break;
}
/* FALLTHROUGH */
@ -1739,7 +1736,7 @@ xfs_mod_incore_sb_batch(xfs_mount_t *mp, xfs_mod_sb_t *msb, uint nmsb, int rsvd)
msbp--;
}
}
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
return status;
}
@ -1887,12 +1884,12 @@ xfs_mount_log_sbunit(
*
* Locking rules:
*
* 1. XFS_SB_LOCK() before picking up per-cpu locks
* 1. m_sb_lock before picking up per-cpu locks
* 2. per-cpu locks always picked up via for_each_online_cpu() order
* 3. accurate counter sync requires XFS_SB_LOCK + per cpu locks
* 3. accurate counter sync requires m_sb_lock + per cpu locks
* 4. modifying per-cpu counters requires holding per-cpu lock
* 5. modifying global counters requires holding XFS_SB_LOCK
* 6. enabling or disabling a counter requires holding the XFS_SB_LOCK
* 5. modifying global counters requires holding m_sb_lock
* 6. enabling or disabling a counter requires holding the m_sb_lock
* and _none_ of the per-cpu locks.
*
* Disabled counters are only ever re-enabled by a balance operation
@ -1945,7 +1942,7 @@ xfs_icsb_cpu_notify(
* count into the total on the global superblock and
* re-enable the counters. */
xfs_icsb_lock(mp);
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
xfs_icsb_disable_counter(mp, XFS_SBS_ICOUNT);
xfs_icsb_disable_counter(mp, XFS_SBS_IFREE);
xfs_icsb_disable_counter(mp, XFS_SBS_FDBLOCKS);
@ -1962,7 +1959,7 @@ xfs_icsb_cpu_notify(
XFS_ICSB_SB_LOCKED, 0);
xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS,
XFS_ICSB_SB_LOCKED, 0);
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
xfs_icsb_unlock(mp);
break;
}
@ -2197,7 +2194,7 @@ xfs_icsb_sync_counters_flags(
/* Pass 1: lock all counters */
if ((flags & XFS_ICSB_SB_LOCKED) == 0)
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
xfs_icsb_count(mp, &cnt, flags);
@ -2210,7 +2207,7 @@ xfs_icsb_sync_counters_flags(
mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks;
if ((flags & XFS_ICSB_SB_LOCKED) == 0)
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
}
/*
@ -2255,7 +2252,7 @@ xfs_icsb_balance_counter(
uint64_t min = (uint64_t)min_per_cpu;
if (!(flags & XFS_ICSB_SB_LOCKED))
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
/* disable counter and sync counter */
xfs_icsb_disable_counter(mp, field);
@ -2289,7 +2286,7 @@ xfs_icsb_balance_counter(
xfs_icsb_enable_counter(mp, field, count, resid);
out:
if (!(flags & XFS_ICSB_SB_LOCKED))
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
}
int
@ -2379,15 +2376,15 @@ slow_path:
* running atomically here, we know a rebalance cannot
* be in progress. Hence we can go straight to operating
* on the global superblock. We do not call xfs_mod_incore_sb()
* here even though we need to get the SB_LOCK. Doing so
* here even though we need to get the m_sb_lock. Doing so
* will cause us to re-enter this function and deadlock.
* Hence we get the SB_LOCK ourselves and then call
* Hence we get the m_sb_lock ourselves and then call
* xfs_mod_incore_sb_unlocked() as the unlocked path operates
* directly on the global counters.
*/
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
ret = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd);
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
/*
* Now that we've modified the global superblock, we

4
fs/xfs/xfs_mount.h
View File

@ -227,7 +227,7 @@ typedef struct xfs_mount {
xfs_ail_entry_t m_ail; /* fs active log item list */
uint m_ail_gen; /* fs AIL generation count */
xfs_sb_t m_sb; /* copy of fs superblock */
lock_t m_sb_lock; /* sb counter mutex */
spinlock_t m_sb_lock; /* sb counter lock */
struct xfs_buf *m_sb_bp; /* buffer for superblock */
char *m_fsname; /* filesystem name */
int m_fsname_len; /* strlen of fs name */
@ -503,8 +503,6 @@ typedef struct xfs_mod_sb {
#define XFS_MOUNT_ILOCK(mp) mutex_lock(&((mp)->m_ilock))
#define XFS_MOUNT_IUNLOCK(mp) mutex_unlock(&((mp)->m_ilock))
#define XFS_SB_LOCK(mp) mutex_spinlock(&(mp)->m_sb_lock)
#define XFS_SB_UNLOCK(mp,s) mutex_spinunlock(&(mp)->m_sb_lock,(s))
extern xfs_mount_t *xfs_mount_init(void);
extern void xfs_mod_sb(xfs_trans_t *, __int64_t);

7
fs/xfs/xfs_qmops.c
View File

@ -49,18 +49,17 @@ xfs_mount_reset_sbqflags(xfs_mount_t *mp)
{
int error;
xfs_trans_t *tp;
unsigned long s;
mp->m_qflags = 0;
/*
* It is OK to look at sb_qflags here in mount path,
* without SB_LOCK.
* without m_sb_lock.
*/
if (mp->m_sb.sb_qflags == 0)
return 0;
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
mp->m_sb.sb_qflags = 0;
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
/*
* if the fs is readonly, let the incore superblock run

7
fs/xfs/xfs_utils.c
View File

@ -330,7 +330,6 @@ xfs_bump_ino_vers2(
xfs_inode_t *ip)
{
xfs_mount_t *mp;
unsigned long s;
ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE));
ASSERT(ip->i_d.di_version == XFS_DINODE_VERSION_1);
@ -340,13 +339,13 @@ xfs_bump_ino_vers2(
memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
mp = tp->t_mountp;
if (!XFS_SB_VERSION_HASNLINK(&mp->m_sb)) {
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
if (!XFS_SB_VERSION_HASNLINK(&mp->m_sb)) {
XFS_SB_VERSION_ADDNLINK(&mp->m_sb);
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
xfs_mod_sb(tp, XFS_SB_VERSIONNUM);
} else {
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
}
}
/* Caller must log the inode */

5
fs/xfs/xfs_vfsops.c
View File

@ -854,14 +854,13 @@ xfs_statvfs(
__uint64_t fakeinos;
xfs_extlen_t lsize;
xfs_sb_t *sbp;
unsigned long s;
sbp = &(mp->m_sb);
statp->f_type = XFS_SB_MAGIC;
xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT);
s = XFS_SB_LOCK(mp);
spin_lock(&mp->m_sb_lock);
statp->f_bsize = sbp->sb_blocksize;
lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
statp->f_blocks = sbp->sb_dblocks - lsize;
@ -881,7 +880,7 @@ xfs_statvfs(
statp->f_files,
mp->m_maxicount);
statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
XFS_SB_UNLOCK(mp, s);
spin_unlock(&mp->m_sb_lock);
xfs_statvfs_fsid(statp, mp);
statp->f_namelen = MAXNAMELEN - 1;