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[XFS] Unwrap LOG_LOCK.

Browse source 
Un-obfuscate LOG_LOCK, remove LOG_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:29740a

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 17:37:10 +10:00 committed by Lachlan McIlroy
parent 287f3dad14
commit b22cd72c95
2 changed files with 72 additions and 93 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

161
fs/xfs/xfs_log.c
View file

@ -399,10 +399,10 @@ xfs_log_notify(xfs_mount_t *mp, /* mount of partition */
{
xlog_t *log = mp->m_log;
xlog_in_core_t *iclog = (xlog_in_core_t *)iclog_hndl;
int abortflg, spl;
int abortflg;
cb->cb_next = NULL;
spl = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
abortflg = (iclog->ic_state & XLOG_STATE_IOERROR);
if (!abortflg) {
ASSERT_ALWAYS((iclog->ic_state == XLOG_STATE_ACTIVE) ||
@ -411,7 +411,7 @@ xfs_log_notify(xfs_mount_t *mp, /* mount of partition */
*(iclog->ic_callback_tail) = cb;
iclog->ic_callback_tail = &(cb->cb_next);
}
LOG_UNLOCK(log, spl);
spin_unlock(&log->l_icloglock);
return abortflg;
} /* xfs_log_notify */
@ -606,7 +606,6 @@ xfs_log_unmount_write(xfs_mount_t *mp)
xfs_log_ticket_t tic = NULL;
xfs_lsn_t lsn;
int error;
SPLDECL(s);
/* the data section must be 32 bit size aligned */
struct {
@ -659,24 +658,24 @@ xfs_log_unmount_write(xfs_mount_t *mp)
}
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
iclog = log->l_iclog;
iclog->ic_refcnt++;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
xlog_state_want_sync(log, iclog);
(void) xlog_state_release_iclog(log, iclog);
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
if (!(iclog->ic_state == XLOG_STATE_ACTIVE ||
iclog->ic_state == XLOG_STATE_DIRTY)) {
if (!XLOG_FORCED_SHUTDOWN(log)) {
sv_wait(&iclog->ic_forcesema, PMEM,
&log->l_icloglock, s);
} else {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
}
} else {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
}
if (tic) {
xlog_trace_loggrant(log, tic, "unmount rec");
@ -697,15 +696,15 @@ xfs_log_unmount_write(xfs_mount_t *mp)
* a file system that went into forced_shutdown as
* the result of an unmount..
*/
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
iclog = log->l_iclog;
iclog->ic_refcnt++;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
xlog_state_want_sync(log, iclog);
(void) xlog_state_release_iclog(log, iclog);
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
if ( ! ( iclog->ic_state == XLOG_STATE_ACTIVE
|| iclog->ic_state == XLOG_STATE_DIRTY
@ -714,7 +713,7 @@ xfs_log_unmount_write(xfs_mount_t *mp)
sv_wait(&iclog->ic_forcesema, PMEM,
&log->l_icloglock, s);
} else {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
}
}
@ -770,9 +769,9 @@ xfs_log_move_tail(xfs_mount_t *mp,
if (tail_lsn == 0) {
/* needed since sync_lsn is 64 bits */
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
tail_lsn = log->l_last_sync_lsn;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
}
s = GRANT_LOCK(log);
@ -836,14 +835,13 @@ xfs_log_move_tail(xfs_mount_t *mp,
int
xfs_log_need_covered(xfs_mount_t *mp)
{
SPLDECL(s);
int needed = 0, gen;
xlog_t *log = mp->m_log;
if (!xfs_fs_writable(mp))
return 0;
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
if (((log->l_covered_state == XLOG_STATE_COVER_NEED) ||
(log->l_covered_state == XLOG_STATE_COVER_NEED2))
&& !xfs_trans_first_ail(mp, &gen)
@ -856,7 +854,7 @@ xfs_log_need_covered(xfs_mount_t *mp)
}
needed = 1;
}
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return needed;
}
@ -1534,7 +1532,6 @@ xlog_dealloc_log(xlog_t *log)
xlog_ticket_t *tic, *next_tic;
int i;
iclog = log->l_iclog;
for (i=0; i<log->l_iclog_bufs; i++) {
sv_destroy(&iclog->ic_forcesema);
@ -1592,14 +1589,12 @@ xlog_state_finish_copy(xlog_t *log,
int record_cnt,
int copy_bytes)
{
SPLDECL(s);
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
iclog->ic_header.h_num_logops += record_cnt;
iclog->ic_offset += copy_bytes;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
} /* xlog_state_finish_copy */
@ -2091,7 +2086,7 @@ xlog_state_do_callback(
* looping too many times */
SPLDECL(s);
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
first_iclog = iclog = log->l_iclog;
ioerrors = 0;
funcdidcallbacks = 0;
@ -2136,7 +2131,7 @@ xlog_state_do_callback(
* to DO_CALLBACK, we will not process it when
* we retry since a previous iclog is in the
* CALLBACK and the state cannot change since
* we are holding the LOG_LOCK.
* we are holding the l_icloglock.
*/
if (!(iclog->ic_state &
(XLOG_STATE_DONE_SYNC |
@ -2174,7 +2169,7 @@ xlog_state_do_callback(
iclog->ic_state = XLOG_STATE_CALLBACK;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
/* l_last_sync_lsn field protected by
* GRANT_LOCK. Don't worry about iclog's lsn.
@ -2195,7 +2190,7 @@ xlog_state_do_callback(
* empty and change the state to DIRTY so that
* we don't miss any more callbacks being added.
*/
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
} else {
ioerrors++;
}
@ -2204,14 +2199,14 @@ xlog_state_do_callback(
while (cb) {
iclog->ic_callback_tail = &(iclog->ic_callback);
iclog->ic_callback = NULL;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
/* perform callbacks in the order given */
for (; cb; cb = cb_next) {
cb_next = cb->cb_next;
cb->cb_func(cb->cb_arg, aborted);
}
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
cb = iclog->ic_callback;
}
@ -2258,7 +2253,7 @@ xlog_state_do_callback(
*
* SYNCING - i/o completion will go through logs
* DONE_SYNC - interrupt thread should be waiting for
* LOG_LOCK
* l_icloglock
* IOERROR - give up hope all ye who enter here
*/
if (iclog->ic_state == XLOG_STATE_WANT_SYNC ||
@ -2276,7 +2271,7 @@ xlog_state_do_callback(
flushcnt = log->l_flushcnt;
log->l_flushcnt = 0;
}
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
while (flushcnt--)
vsema(&log->l_flushsema);
} /* xlog_state_do_callback */
@ -2302,9 +2297,8 @@ xlog_state_done_syncing(
int aborted)
{
xlog_t *log = iclog->ic_log;
SPLDECL(s);
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
ASSERT(iclog->ic_state == XLOG_STATE_SYNCING ||
iclog->ic_state == XLOG_STATE_IOERROR);
@ -2320,7 +2314,7 @@ xlog_state_done_syncing(
*/
if (iclog->ic_state != XLOG_STATE_IOERROR) {
if (--iclog->ic_bwritecnt == 1) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return;
}
iclog->ic_state = XLOG_STATE_DONE_SYNC;
@ -2332,7 +2326,7 @@ xlog_state_done_syncing(
* I/O, the others get to wait for the result.
*/
sv_broadcast(&iclog->ic_writesema);
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
xlog_state_do_callback(log, aborted, iclog); /* also cleans log */
} /* xlog_state_done_syncing */
@ -2365,23 +2359,22 @@ xlog_state_get_iclog_space(xlog_t *log,
int *continued_write,
int *logoffsetp)
{
SPLDECL(s);
int log_offset;
xlog_rec_header_t *head;
xlog_in_core_t *iclog;
int error;
restart:
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
if (XLOG_FORCED_SHUTDOWN(log)) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return XFS_ERROR(EIO);
}
iclog = log->l_iclog;
if (! (iclog->ic_state == XLOG_STATE_ACTIVE)) {
log->l_flushcnt++;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
xlog_trace_iclog(iclog, XLOG_TRACE_SLEEP_FLUSH);
XFS_STATS_INC(xs_log_noiclogs);
/* Ensure that log writes happen */
@ -2423,12 +2416,12 @@ restart:
/* If I'm the only one writing to this iclog, sync it to disk */
if (iclog->ic_refcnt == 1) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
if ((error = xlog_state_release_iclog(log, iclog)))
return error;
} else {
iclog->ic_refcnt--;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
}
goto restart;
}
@ -2449,7 +2442,7 @@ restart:
*iclogp = iclog;
ASSERT(iclog->ic_offset <= iclog->ic_size);
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
*logoffsetp = log_offset;
return 0;
@ -2803,11 +2796,9 @@ void
xlog_state_put_ticket(xlog_t *log,
xlog_ticket_t *tic)
{
unsigned long s;
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
xlog_ticket_put(log, tic);
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
} /* xlog_state_put_ticket */
/*
@ -2823,15 +2814,14 @@ int
xlog_state_release_iclog(xlog_t *log,
xlog_in_core_t *iclog)
{
SPLDECL(s);
int sync = 0; /* do we sync? */
xlog_assign_tail_lsn(log->l_mp);
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
if (iclog->ic_state & XLOG_STATE_IOERROR) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return XFS_ERROR(EIO);
}
@ -2848,7 +2838,7 @@ xlog_state_release_iclog(xlog_t *log,
/* cycle incremented when incrementing curr_block */
}
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
/*
* We let the log lock go, so it's possible that we hit a log I/O
@ -2939,13 +2929,12 @@ xlog_state_sync_all(xlog_t *log, uint flags, int *log_flushed)
{
xlog_in_core_t *iclog;
xfs_lsn_t lsn;
SPLDECL(s);
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
iclog = log->l_iclog;
if (iclog->ic_state & XLOG_STATE_IOERROR) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return XFS_ERROR(EIO);
}
@ -2980,12 +2969,12 @@ xlog_state_sync_all(xlog_t *log, uint flags, int *log_flushed)
iclog->ic_refcnt++;
lsn = INT_GET(iclog->ic_header.h_lsn, ARCH_CONVERT);
xlog_state_switch_iclogs(log, iclog, 0);
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
if (xlog_state_release_iclog(log, iclog))
return XFS_ERROR(EIO);
*log_flushed = 1;
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
if (INT_GET(iclog->ic_header.h_lsn, ARCH_CONVERT) == lsn &&
iclog->ic_state != XLOG_STATE_DIRTY)
goto maybe_sleep;
@ -3011,12 +3000,12 @@ maybe_sleep:
if (flags & XFS_LOG_SYNC) {
/*
* We must check if we're shutting down here, before
* we wait, while we're holding the LOG_LOCK.
* we wait, while we're holding the l_icloglock.
* Then we check again after waking up, in case our
* sleep was disturbed by a bad news.
*/
if (iclog->ic_state & XLOG_STATE_IOERROR) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return XFS_ERROR(EIO);
}
XFS_STATS_INC(xs_log_force_sleep);
@ -3033,7 +3022,7 @@ maybe_sleep:
} else {
no_sleep:
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
}
return 0;
} /* xlog_state_sync_all */
@ -3059,15 +3048,13 @@ xlog_state_sync(xlog_t *log,
{
xlog_in_core_t *iclog;
int already_slept = 0;
SPLDECL(s);
try_again:
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
iclog = log->l_iclog;
if (iclog->ic_state & XLOG_STATE_IOERROR) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return XFS_ERROR(EIO);
}
@ -3078,7 +3065,7 @@ try_again:
}
if (iclog->ic_state == XLOG_STATE_DIRTY) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return 0;
}
@ -3113,11 +3100,11 @@ try_again:
} else {
iclog->ic_refcnt++;
xlog_state_switch_iclogs(log, iclog, 0);
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
if (xlog_state_release_iclog(log, iclog))
return XFS_ERROR(EIO);
*log_flushed = 1;
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
}
}
@ -3129,7 +3116,7 @@ try_again:
* gotten a log write error.
*/
if (iclog->ic_state & XLOG_STATE_IOERROR) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return XFS_ERROR(EIO);
}
XFS_STATS_INC(xs_log_force_sleep);
@ -3143,13 +3130,13 @@ try_again:
return XFS_ERROR(EIO);
*log_flushed = 1;
} else { /* just return */
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
}
return 0;
} while (iclog != log->l_iclog);
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
return 0;
} /* xlog_state_sync */
@ -3161,9 +3148,7 @@ try_again:
void
xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog)
{
SPLDECL(s);
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
if (iclog->ic_state == XLOG_STATE_ACTIVE) {
xlog_state_switch_iclogs(log, iclog, 0);
@ -3172,7 +3157,7 @@ xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog)
(XLOG_STATE_WANT_SYNC|XLOG_STATE_IOERROR));
}
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
} /* xlog_state_want_sync */
@ -3194,7 +3179,6 @@ xlog_state_ticket_alloc(xlog_t *log)
xlog_ticket_t *next;
xfs_caddr_t buf;
uint i = (NBPP / sizeof(xlog_ticket_t)) - 2;
SPLDECL(s);
/*
* The kmem_zalloc may sleep, so we shouldn't be holding the
@ -3202,7 +3186,7 @@ xlog_state_ticket_alloc(xlog_t *log)
*/
buf = (xfs_caddr_t) kmem_zalloc(NBPP, KM_SLEEP);
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
/* Attach 1st ticket to Q, so we can keep track of allocated memory */
t_list = (xlog_ticket_t *)buf;
@ -3231,7 +3215,7 @@ xlog_state_ticket_alloc(xlog_t *log)
}
t_list->t_next = NULL;
log->l_tail = t_list;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
} /* xlog_state_ticket_alloc */
@ -3282,15 +3266,14 @@ xlog_ticket_get(xlog_t *log,
{
xlog_ticket_t *tic;
uint num_headers;
SPLDECL(s);
alloc:
if (log->l_freelist == NULL)
xlog_state_ticket_alloc(log); /* potentially sleep */
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
if (log->l_freelist == NULL) {
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
goto alloc;
}
tic = log->l_freelist;
@ -3298,7 +3281,7 @@ xlog_ticket_get(xlog_t *log,
if (log->l_freelist == NULL)
log->l_tail = NULL;
log->l_ticket_cnt--;
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
/*
* Permanent reservations have up to 'cnt'-1 active log operations
@ -3473,10 +3456,9 @@ xlog_verify_iclog(xlog_t *log,
__uint8_t clientid;
int len, i, j, k, op_len;
int idx;
SPLDECL(s);
/* check validity of iclog pointers */
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
icptr = log->l_iclog;
for (i=0; i < log->l_iclog_bufs; i++) {
if (icptr == NULL)
@ -3485,7 +3467,7 @@ xlog_verify_iclog(xlog_t *log,
}
if (icptr != log->l_iclog)
xlog_panic("xlog_verify_iclog: corrupt iclog ring");
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
/* check log magic numbers */
ptr = (xfs_caddr_t) &(iclog->ic_header);
@ -3549,7 +3531,7 @@ xlog_verify_iclog(xlog_t *log,
#endif
/*
* Mark all iclogs IOERROR. LOG_LOCK is held by the caller.
* Mark all iclogs IOERROR. l_icloglock is held by the caller.
*/
STATIC int
xlog_state_ioerror(
@ -3598,7 +3580,6 @@ xfs_log_force_umount(
int retval;
int dummy;
SPLDECL(s);
SPLDECL(s2);
log = mp->m_log;
@ -3628,7 +3609,7 @@ xfs_log_force_umount(
* everybody up to tell the bad news.
*/
s = GRANT_LOCK(log);
s2 = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
mp->m_flags |= XFS_MOUNT_FS_SHUTDOWN;
XFS_BUF_DONE(mp->m_sb_bp);
/*
@ -3644,7 +3625,7 @@ xfs_log_force_umount(
*/
if (logerror)
retval = xlog_state_ioerror(log);
LOG_UNLOCK(log, s2);
spin_unlock(&log->l_icloglock);
/*
* We don't want anybody waiting for log reservations
@ -3676,9 +3657,9 @@ xfs_log_force_umount(
* log down completely.
*/
xlog_state_sync_all(log, XFS_LOG_FORCE|XFS_LOG_SYNC, &dummy);
s2 = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
retval = xlog_state_ioerror(log);
LOG_UNLOCK(log, s2);
spin_unlock(&log->l_icloglock);
}
/*
* Wake up everybody waiting on xfs_log_force.
@ -3691,13 +3672,13 @@ xfs_log_force_umount(
{
xlog_in_core_t *iclog;
s = LOG_LOCK(log);
spin_lock(&log->l_icloglock);
iclog = log->l_iclog;
do {
ASSERT(iclog->ic_callback == 0);
iclog = iclog->ic_next;
} while (iclog != log->l_iclog);
LOG_UNLOCK(log, s);
spin_unlock(&log->l_icloglock);
}
#endif
/* return non-zero if log IOERROR transition had already happened */

4
fs/xfs/xfs_log_priv.h
View file

@ -107,8 +107,6 @@ struct xfs_mount;
#define GRANT_LOCK(log) mutex_spinlock(&(log)->l_grant_lock)
#define GRANT_UNLOCK(log, s) mutex_spinunlock(&(log)->l_grant_lock, s)
#define LOG_LOCK(log) mutex_spinlock(&(log)->l_icloglock)
#define LOG_UNLOCK(log, s) mutex_spinunlock(&(log)->l_icloglock, s)
#define xlog_panic(args...) cmn_err(CE_PANIC, ## args)
#define xlog_exit(args...) cmn_err(CE_PANIC, ## args)
@ -415,7 +413,7 @@ typedef struct log {
xlog_ticket_t *l_unmount_free;/* kmem_free these addresses */
xlog_ticket_t *l_tail; /* free list of tickets */
xlog_in_core_t *l_iclog; /* head log queue */
lock_t l_icloglock; /* grab to change iclog state */
spinlock_t l_icloglock; /* grab to change iclog state */
xfs_lsn_t l_tail_lsn; /* lsn of 1st LR with unflushed
* buffers */
xfs_lsn_t l_last_sync_lsn;/* lsn of last LR on disk */