#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_rw.h"
+#include "xfs_trace.h"
kmem_zone_t *xfs_log_ticket_zone;
(off) += (bytes);}
/* Local miscellaneous function prototypes */
-STATIC int xlog_bdstrat_cb(struct xfs_buf *);
STATIC int xlog_commit_record(xfs_mount_t *mp, xlog_ticket_t *ticket,
xlog_in_core_t **, xfs_lsn_t *);
STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp,
STATIC int xlog_sync(xlog_t *log, xlog_in_core_t *iclog);
STATIC void xlog_dealloc_log(xlog_t *log);
STATIC int xlog_write(xfs_mount_t *mp, xfs_log_iovec_t region[],
- int nentries, xfs_log_ticket_t tic,
+ int nentries, struct xlog_ticket *tic,
xfs_lsn_t *start_lsn,
xlog_in_core_t **commit_iclog,
uint flags);
STATIC void xlog_state_switch_iclogs(xlog_t *log,
xlog_in_core_t *iclog,
int eventual_size);
-STATIC int xlog_state_sync(xlog_t *log,
- xfs_lsn_t lsn,
- uint flags,
- int *log_flushed);
-STATIC int xlog_state_sync_all(xlog_t *log, uint flags, int *log_flushed);
STATIC void xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog);
/* local functions to manipulate grant head */
/* local ticket functions */
-STATIC xlog_ticket_t *xlog_ticket_get(xlog_t *log,
+STATIC xlog_ticket_t *xlog_ticket_alloc(xlog_t *log,
int unit_bytes,
int count,
char clientid,
uint flags);
-STATIC void xlog_ticket_put(xlog_t *log, xlog_ticket_t *ticket);
#if defined(DEBUG)
STATIC void xlog_verify_dest_ptr(xlog_t *log, __psint_t ptr);
STATIC int xlog_iclogs_empty(xlog_t *log);
-#if defined(XFS_LOG_TRACE)
-
-#define XLOG_TRACE_LOGGRANT_SIZE 2048
-#define XLOG_TRACE_ICLOG_SIZE 256
-
-void
-xlog_trace_loggrant_alloc(xlog_t *log)
-{
- log->l_grant_trace = ktrace_alloc(XLOG_TRACE_LOGGRANT_SIZE, KM_NOFS);
-}
-
-void
-xlog_trace_loggrant_dealloc(xlog_t *log)
-{
- ktrace_free(log->l_grant_trace);
-}
-
-void
-xlog_trace_loggrant(xlog_t *log, xlog_ticket_t *tic, xfs_caddr_t string)
-{
- unsigned long cnts;
-
- /* ticket counts are 1 byte each */
- cnts = ((unsigned long)tic->t_ocnt) | ((unsigned long)tic->t_cnt) << 8;
-
- ktrace_enter(log->l_grant_trace,
- (void *)tic,
- (void *)log->l_reserve_headq,
- (void *)log->l_write_headq,
- (void *)((unsigned long)log->l_grant_reserve_cycle),
- (void *)((unsigned long)log->l_grant_reserve_bytes),
- (void *)((unsigned long)log->l_grant_write_cycle),
- (void *)((unsigned long)log->l_grant_write_bytes),
- (void *)((unsigned long)log->l_curr_cycle),
- (void *)((unsigned long)log->l_curr_block),
- (void *)((unsigned long)CYCLE_LSN(log->l_tail_lsn)),
- (void *)((unsigned long)BLOCK_LSN(log->l_tail_lsn)),
- (void *)string,
- (void *)((unsigned long)tic->t_trans_type),
- (void *)cnts,
- (void *)((unsigned long)tic->t_curr_res),
- (void *)((unsigned long)tic->t_unit_res));
-}
-
-void
-xlog_trace_iclog_alloc(xlog_in_core_t *iclog)
-{
- iclog->ic_trace = ktrace_alloc(XLOG_TRACE_ICLOG_SIZE, KM_NOFS);
-}
-
-void
-xlog_trace_iclog_dealloc(xlog_in_core_t *iclog)
-{
- ktrace_free(iclog->ic_trace);
-}
-
-void
-xlog_trace_iclog(xlog_in_core_t *iclog, uint state)
-{
- ktrace_enter(iclog->ic_trace,
- (void *)((unsigned long)state),
- (void *)((unsigned long)current_pid()),
- (void *)NULL, (void *)NULL, (void *)NULL, (void *)NULL,
- (void *)NULL, (void *)NULL, (void *)NULL, (void *)NULL,
- (void *)NULL, (void *)NULL, (void *)NULL, (void *)NULL,
- (void *)NULL, (void *)NULL);
-}
-#else
-
-#define xlog_trace_loggrant_alloc(log)
-#define xlog_trace_loggrant_dealloc(log)
-#define xlog_trace_loggrant(log,tic,string)
-
-#define xlog_trace_iclog_alloc(iclog)
-#define xlog_trace_iclog_dealloc(iclog)
-#define xlog_trace_iclog(iclog,state)
-
-#endif /* XFS_LOG_TRACE */
-
static void
xlog_ins_ticketq(struct xlog_ticket **qp, struct xlog_ticket *tic)
* out when the next write occurs.
*/
xfs_lsn_t
-xfs_log_done(xfs_mount_t *mp,
- xfs_log_ticket_t xtic,
- void **iclog,
- uint flags)
+xfs_log_done(
+ struct xfs_mount *mp,
+ struct xlog_ticket *ticket,
+ struct xlog_in_core **iclog,
+ uint flags)
{
- xlog_t *log = mp->m_log;
- xlog_ticket_t *ticket = (xfs_log_ticket_t) xtic;
- xfs_lsn_t lsn = 0;
+ struct log *log = mp->m_log;
+ xfs_lsn_t lsn = 0;
if (XLOG_FORCED_SHUTDOWN(log) ||
/*
* If we get an error, just continue and give back the log ticket.
*/
(((ticket->t_flags & XLOG_TIC_INITED) == 0) &&
- (xlog_commit_record(mp, ticket,
- (xlog_in_core_t **)iclog, &lsn)))) {
+ (xlog_commit_record(mp, ticket, iclog, &lsn)))) {
lsn = (xfs_lsn_t) -1;
if (ticket->t_flags & XLOG_TIC_PERM_RESERV) {
flags |= XFS_LOG_REL_PERM_RESERV;
if ((ticket->t_flags & XLOG_TIC_PERM_RESERV) == 0 ||
(flags & XFS_LOG_REL_PERM_RESERV)) {
+ trace_xfs_log_done_nonperm(log, ticket);
+
/*
* Release ticket if not permanent reservation or a specific
* request has been made to release a permanent reservation.
*/
- xlog_trace_loggrant(log, ticket, "xfs_log_done: (non-permanent)");
xlog_ungrant_log_space(log, ticket);
- xlog_ticket_put(log, ticket);
+ xfs_log_ticket_put(ticket);
} else {
- xlog_trace_loggrant(log, ticket, "xfs_log_done: (permanent)");
+ trace_xfs_log_done_perm(log, ticket);
+
xlog_regrant_reserve_log_space(log, ticket);
/* If this ticket was a permanent reservation and we aren't
* trying to release it, reset the inited flags; so next time
}
return lsn;
-} /* xfs_log_done */
-
-
-/*
- * Force the in-core log to disk. If flags == XFS_LOG_SYNC,
- * the force is done synchronously.
- *
- * Asynchronous forces are implemented by setting the WANT_SYNC
- * bit in the appropriate in-core log and then returning.
- *
- * Synchronous forces are implemented with a signal variable. All callers
- * to force a given lsn to disk will wait on a the sv attached to the
- * specific in-core log. When given in-core log finally completes its
- * write to disk, that thread will wake up all threads waiting on the
- * sv.
- */
-int
-_xfs_log_force(
- xfs_mount_t *mp,
- xfs_lsn_t lsn,
- uint flags,
- int *log_flushed)
-{
- xlog_t *log = mp->m_log;
- int dummy;
-
- if (!log_flushed)
- log_flushed = &dummy;
-
- ASSERT(flags & XFS_LOG_FORCE);
-
- XFS_STATS_INC(xs_log_force);
-
- if (log->l_flags & XLOG_IO_ERROR)
- return XFS_ERROR(EIO);
- if (lsn == 0)
- return xlog_state_sync_all(log, flags, log_flushed);
- else
- return xlog_state_sync(log, lsn, flags, log_flushed);
-} /* _xfs_log_force */
-
-/*
- * Wrapper for _xfs_log_force(), to be used when caller doesn't care
- * about errors or whether the log was flushed or not. This is the normal
- * interface to use when trying to unpin items or move the log forward.
- */
-void
-xfs_log_force(
- xfs_mount_t *mp,
- xfs_lsn_t lsn,
- uint flags)
-{
- int error;
- error = _xfs_log_force(mp, lsn, flags, NULL);
- if (error) {
- xfs_fs_cmn_err(CE_WARN, mp, "xfs_log_force: "
- "error %d returned.", error);
- }
}
-
/*
* Attaches a new iclog I/O completion callback routine during
* transaction commit. If the log is in error state, a non-zero
* executing the callback at an appropriate time.
*/
int
-xfs_log_notify(xfs_mount_t *mp, /* mount of partition */
- void *iclog_hndl, /* iclog to hang callback off */
- xfs_log_callback_t *cb)
+xfs_log_notify(
+ struct xfs_mount *mp,
+ struct xlog_in_core *iclog,
+ xfs_log_callback_t *cb)
{
- xlog_in_core_t *iclog = (xlog_in_core_t *)iclog_hndl;
int abortflg;
spin_lock(&iclog->ic_callback_lock);
}
spin_unlock(&iclog->ic_callback_lock);
return abortflg;
-} /* xfs_log_notify */
+}
int
-xfs_log_release_iclog(xfs_mount_t *mp,
- void *iclog_hndl)
+xfs_log_release_iclog(
+ struct xfs_mount *mp,
+ struct xlog_in_core *iclog)
{
- xlog_t *log = mp->m_log;
- xlog_in_core_t *iclog = (xlog_in_core_t *)iclog_hndl;
-
- if (xlog_state_release_iclog(log, iclog)) {
+ if (xlog_state_release_iclog(mp->m_log, iclog)) {
xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
return EIO;
}
* reservation, we prevent over allocation problems.
*/
int
-xfs_log_reserve(xfs_mount_t *mp,
- int unit_bytes,
- int cnt,
- xfs_log_ticket_t *ticket,
- __uint8_t client,
- uint flags,
- uint t_type)
+xfs_log_reserve(
+ struct xfs_mount *mp,
+ int unit_bytes,
+ int cnt,
+ struct xlog_ticket **ticket,
+ __uint8_t client,
+ uint flags,
+ uint t_type)
{
- xlog_t *log = mp->m_log;
- xlog_ticket_t *internal_ticket;
- int retval = 0;
+ struct log *log = mp->m_log;
+ struct xlog_ticket *internal_ticket;
+ int retval = 0;
ASSERT(client == XFS_TRANSACTION || client == XFS_LOG);
ASSERT((flags & XFS_LOG_NOSLEEP) == 0);
XFS_STATS_INC(xs_try_logspace);
+
if (*ticket != NULL) {
ASSERT(flags & XFS_LOG_PERM_RESERV);
- internal_ticket = (xlog_ticket_t *)*ticket;
- xlog_trace_loggrant(log, internal_ticket, "xfs_log_reserve: existing ticket (permanent trans)");
+ internal_ticket = *ticket;
+
+ trace_xfs_log_reserve(log, internal_ticket);
+
xlog_grant_push_ail(mp, internal_ticket->t_unit_res);
retval = xlog_regrant_write_log_space(log, internal_ticket);
} else {
/* may sleep if need to allocate more tickets */
- internal_ticket = xlog_ticket_get(log, unit_bytes, cnt,
+ internal_ticket = xlog_ticket_alloc(log, unit_bytes, cnt,
client, flags);
if (!internal_ticket)
return XFS_ERROR(ENOMEM);
internal_ticket->t_trans_type = t_type;
*ticket = internal_ticket;
- xlog_trace_loggrant(log, internal_ticket,
- (internal_ticket->t_flags & XLOG_TIC_PERM_RESERV) ?
- "xfs_log_reserve: create new ticket (permanent trans)" :
- "xfs_log_reserve: create new ticket");
+
+ trace_xfs_log_reserve(log, internal_ticket);
+
xlog_grant_push_ail(mp,
(internal_ticket->t_unit_res *
internal_ticket->t_cnt));
}
mp->m_log = xlog_alloc_log(mp, log_target, blk_offset, num_bblks);
+ if (IS_ERR(mp->m_log)) {
+ error = -PTR_ERR(mp->m_log);
+ goto out;
+ }
/*
* Initialize the AIL now we have a log.
error = xfs_trans_ail_init(mp);
if (error) {
cmn_err(CE_WARN, "XFS: AIL initialisation failed: error %d", error);
- goto error;
+ goto out_free_log;
}
+ mp->m_log->l_ailp = mp->m_ail;
/*
* skip log recovery on a norecovery mount. pretend it all
mp->m_flags |= XFS_MOUNT_RDONLY;
if (error) {
cmn_err(CE_WARN, "XFS: log mount/recovery failed: error %d", error);
- goto error;
+ goto out_destroy_ail;
}
}
/* Normal transactions can now occur */
mp->m_log->l_flags &= ~XLOG_ACTIVE_RECOVERY;
- /* End mounting message in xfs_log_mount_finish */
return 0;
-error:
- xfs_log_unmount_dealloc(mp);
+
+out_destroy_ail:
+ xfs_trans_ail_destroy(mp);
+out_free_log:
+ xlog_dealloc_log(mp->m_log);
+out:
return error;
-} /* xfs_log_mount */
+}
/*
* Finish the recovery of the file system. This is separate from
}
/*
- * Unmount processing for the log.
- */
-int
-xfs_log_unmount(xfs_mount_t *mp)
-{
- int error;
-
- error = xfs_log_unmount_write(mp);
- xfs_log_unmount_dealloc(mp);
- return error;
-}
-
-/*
* Final log writes as part of unmount.
*
* Mark the filesystem clean as unmount happens. Note that during relocation
xlog_in_core_t *first_iclog;
#endif
xfs_log_iovec_t reg[1];
- xfs_log_ticket_t tic = NULL;
+ xlog_ticket_t *tic = NULL;
xfs_lsn_t lsn;
int error;
if (mp->m_flags & XFS_MOUNT_RDONLY)
return 0;
- error = _xfs_log_force(mp, 0, XFS_LOG_FORCE|XFS_LOG_SYNC, NULL);
+ error = _xfs_log_force(mp, XFS_LOG_SYNC, NULL);
ASSERT(error || !(XLOG_FORCED_SHUTDOWN(log)));
#ifdef DEBUG
if (! (XLOG_FORCED_SHUTDOWN(log))) {
reg[0].i_addr = (void*)&magic;
reg[0].i_len = sizeof(magic);
- XLOG_VEC_SET_TYPE(®[0], XLOG_REG_TYPE_UNMOUNT);
+ reg[0].i_type = XLOG_REG_TYPE_UNMOUNT;
error = xfs_log_reserve(mp, 600, 1, &tic,
XFS_LOG, 0, XLOG_UNMOUNT_REC_TYPE);
spin_lock(&log->l_icloglock);
iclog = log->l_iclog;
atomic_inc(&iclog->ic_refcnt);
- spin_unlock(&log->l_icloglock);
xlog_state_want_sync(log, iclog);
+ spin_unlock(&log->l_icloglock);
error = xlog_state_release_iclog(log, iclog);
spin_lock(&log->l_icloglock);
spin_unlock(&log->l_icloglock);
}
if (tic) {
- xlog_trace_loggrant(log, tic, "unmount rec");
+ trace_xfs_log_umount_write(log, tic);
xlog_ungrant_log_space(log, tic);
- xlog_ticket_put(log, tic);
+ xfs_log_ticket_put(tic);
}
} else {
/*
spin_lock(&log->l_icloglock);
iclog = log->l_iclog;
atomic_inc(&iclog->ic_refcnt);
- spin_unlock(&log->l_icloglock);
xlog_state_want_sync(log, iclog);
+ spin_unlock(&log->l_icloglock);
error = xlog_state_release_iclog(log, iclog);
spin_lock(&log->l_icloglock);
* and deallocate the log as the aild references the log.
*/
void
-xfs_log_unmount_dealloc(xfs_mount_t *mp)
+xfs_log_unmount(xfs_mount_t *mp)
{
xfs_trans_ail_destroy(mp);
xlog_dealloc_log(mp->m_log);
* transaction occur with one call to xfs_log_write().
*/
int
-xfs_log_write(xfs_mount_t * mp,
- xfs_log_iovec_t reg[],
- int nentries,
- xfs_log_ticket_t tic,
- xfs_lsn_t *start_lsn)
+xfs_log_write(
+ struct xfs_mount *mp,
+ struct xfs_log_iovec reg[],
+ int nentries,
+ struct xlog_ticket *tic,
+ xfs_lsn_t *start_lsn)
{
- int error;
- xlog_t *log = mp->m_log;
+ struct log *log = mp->m_log;
+ int error;
if (XLOG_FORCED_SHUTDOWN(log))
return XFS_ERROR(EIO);
- if ((error = xlog_write(mp, reg, nentries, tic, start_lsn, NULL, 0))) {
+ error = xlog_write(mp, reg, nentries, tic, start_lsn, NULL, 0);
+ if (error)
xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
- }
return error;
-} /* xfs_log_write */
-
+}
void
xfs_log_move_tail(xfs_mount_t *mp,
/*
* Determine if we have a transaction that has gone to disk
- * that needs to be covered. Log activity needs to be idle (no AIL and
- * nothing in the iclogs). And, we need to be in the right state indicating
- * something has gone out.
+ * that needs to be covered. To begin the transition to the idle state
+ * firstly the log needs to be idle (no AIL and nothing in the iclogs).
+ * If we are then in a state where covering is needed, the caller is informed
+ * that dummy transactions are required to move the log into the idle state.
+ *
+ * Because this is called as part of the sync process, we should also indicate
+ * that dummy transactions should be issued in anything but the covered or
+ * idle states. This ensures that the log tail is accurately reflected in
+ * the log at the end of the sync, hence if a crash occurrs avoids replay
+ * of transactions where the metadata is already on disk.
*/
int
xfs_log_need_covered(xfs_mount_t *mp)
return 0;
spin_lock(&log->l_icloglock);
- if (((log->l_covered_state == XLOG_STATE_COVER_NEED) ||
- (log->l_covered_state == XLOG_STATE_COVER_NEED2))
- && !xfs_trans_ail_tail(mp->m_ail)
- && xlog_iclogs_empty(log)) {
- if (log->l_covered_state == XLOG_STATE_COVER_NEED)
- log->l_covered_state = XLOG_STATE_COVER_DONE;
- else {
- ASSERT(log->l_covered_state == XLOG_STATE_COVER_NEED2);
- log->l_covered_state = XLOG_STATE_COVER_DONE2;
+ switch (log->l_covered_state) {
+ case XLOG_STATE_COVER_DONE:
+ case XLOG_STATE_COVER_DONE2:
+ case XLOG_STATE_COVER_IDLE:
+ break;
+ case XLOG_STATE_COVER_NEED:
+ case XLOG_STATE_COVER_NEED2:
+ if (!xfs_trans_ail_tail(log->l_ailp) &&
+ xlog_iclogs_empty(log)) {
+ if (log->l_covered_state == XLOG_STATE_COVER_NEED)
+ log->l_covered_state = XLOG_STATE_COVER_DONE;
+ else
+ log->l_covered_state = XLOG_STATE_COVER_DONE2;
}
+ /* FALLTHRU */
+ default:
needed = 1;
+ break;
}
spin_unlock(&log->l_icloglock);
return needed;
ASSERT(XFS_BUF_FSPRIVATE2(bp, unsigned long) == (unsigned long) 2);
XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
aborted = 0;
-
- /*
- * Some versions of cpp barf on the recursive definition of
- * ic_log -> hic_fields.ic_log and expand ic_log twice when
- * it is passed through two macros. Workaround broken cpp.
- */
l = iclog->ic_log;
/*
xfs_fs_cmn_err(CE_WARN, l->l_mp,
"xlog_iodone: Barriers are no longer supported"
" by device. Disabling barriers\n");
- xfs_buftrace("XLOG_IODONE BARRIERS OFF", bp);
}
/*
} /* xlog_iodone */
/*
- * The bdstrat callback function for log bufs. This gives us a central
- * place to trap bufs in case we get hit by a log I/O error and need to
- * shutdown. Actually, in practice, even when we didn't get a log error,
- * we transition the iclogs to IOERROR state *after* flushing all existing
- * iclogs to disk. This is because we don't want anymore new transactions to be
- * started or completed afterwards.
- */
-STATIC int
-xlog_bdstrat_cb(struct xfs_buf *bp)
-{
- xlog_in_core_t *iclog;
-
- iclog = XFS_BUF_FSPRIVATE(bp, xlog_in_core_t *);
-
- if ((iclog->ic_state & XLOG_STATE_IOERROR) == 0) {
- /* note for irix bstrat will need struct bdevsw passed
- * Fix the following macro if the code ever is merged
- */
- XFS_bdstrat(bp);
- return 0;
- }
-
- xfs_buftrace("XLOG__BDSTRAT IOERROR", bp);
- XFS_BUF_ERROR(bp, EIO);
- XFS_BUF_STALE(bp);
- xfs_biodone(bp);
- return XFS_ERROR(EIO);
-
-
-}
-
-/*
* Return size of each in-core log record buffer.
*
- * All machines get 8 x 32KB buffers by default, unless tuned otherwise.
+ * All machines get 8 x 32kB buffers by default, unless tuned otherwise.
*
* If the filesystem blocksize is too large, we may need to choose a
* larger size since the directory code currently logs entire blocks.
}
if (xfs_sb_version_haslogv2(&mp->m_sb)) {
- /* # headers = size / 32K
- * one header holds cycles from 32K of data
+ /* # headers = size / 32k
+ * one header holds cycles from 32k of data
*/
xhdrs = mp->m_logbsize / XLOG_HEADER_CYCLE_SIZE;
goto done;
}
- /* All machines use 32KB buffers by default. */
+ /* All machines use 32kB buffers by default. */
log->l_iclog_size = XLOG_BIG_RECORD_BSIZE;
log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
log->l_iclog_hsize = BBSIZE;
log->l_iclog_heads = 1;
- /*
- * For 16KB, we use 3 32KB buffers. For 32KB block sizes, we use
- * 4 32KB buffers. For 64KB block sizes, we use 8 32KB buffers.
- */
- if (mp->m_sb.sb_blocksize >= 16*1024) {
- log->l_iclog_size = XLOG_BIG_RECORD_BSIZE;
- log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
- if (mp->m_logbufs <= 0) {
- switch (mp->m_sb.sb_blocksize) {
- case 16*1024: /* 16 KB */
- log->l_iclog_bufs = 3;
- break;
- case 32*1024: /* 32 KB */
- log->l_iclog_bufs = 4;
- break;
- case 64*1024: /* 64 KB */
- log->l_iclog_bufs = 8;
- break;
- default:
- xlog_panic("XFS: Invalid blocksize");
- break;
- }
- }
- }
-
-done: /* are we being asked to make the sizes selected above visible? */
+done:
+ /* are we being asked to make the sizes selected above visible? */
if (mp->m_logbufs == 0)
mp->m_logbufs = log->l_iclog_bufs;
if (mp->m_logbsize == 0)
xfs_buf_t *bp;
int i;
int iclogsize;
+ int error = ENOMEM;
- log = (xlog_t *)kmem_zalloc(sizeof(xlog_t), KM_SLEEP);
+ log = kmem_zalloc(sizeof(xlog_t), KM_MAYFAIL);
+ if (!log) {
+ xlog_warn("XFS: Log allocation failed: No memory!");
+ goto out;
+ }
log->l_mp = mp;
log->l_targ = log_target;
log->l_grant_reserve_cycle = 1;
log->l_grant_write_cycle = 1;
+ error = EFSCORRUPTED;
if (xfs_sb_version_hassector(&mp->m_sb)) {
log->l_sectbb_log = mp->m_sb.sb_logsectlog - BBSHIFT;
- ASSERT(log->l_sectbb_log <= mp->m_sectbb_log);
+ if (log->l_sectbb_log < 0 ||
+ log->l_sectbb_log > mp->m_sectbb_log) {
+ xlog_warn("XFS: Log sector size (0x%x) out of range.",
+ log->l_sectbb_log);
+ goto out_free_log;
+ }
+
/* for larger sector sizes, must have v2 or external log */
- ASSERT(log->l_sectbb_log == 0 ||
- log->l_logBBstart == 0 ||
- xfs_sb_version_haslogv2(&mp->m_sb));
- ASSERT(mp->m_sb.sb_logsectlog >= BBSHIFT);
+ if (log->l_sectbb_log != 0 &&
+ (log->l_logBBstart != 0 &&
+ !xfs_sb_version_haslogv2(&mp->m_sb))) {
+ xlog_warn("XFS: log sector size (0x%x) invalid "
+ "for configuration.", log->l_sectbb_log);
+ goto out_free_log;
+ }
+ if (mp->m_sb.sb_logsectlog < BBSHIFT) {
+ xlog_warn("XFS: Log sector log (0x%x) too small.",
+ mp->m_sb.sb_logsectlog);
+ goto out_free_log;
+ }
}
log->l_sectbb_mask = (1 << log->l_sectbb_log) - 1;
xlog_get_iclog_buffer_size(mp, log);
+ error = ENOMEM;
bp = xfs_buf_get_empty(log->l_iclog_size, mp->m_logdev_targp);
+ if (!bp)
+ goto out_free_log;
XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
- XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb);
XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
ASSERT(XFS_BUF_ISBUSY(bp));
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
spin_lock_init(&log->l_grant_lock);
sv_init(&log->l_flush_wait, 0, "flush_wait");
- xlog_trace_loggrant_alloc(log);
/* log record size must be multiple of BBSIZE; see xlog_rec_header_t */
ASSERT((XFS_BUF_SIZE(bp) & BBMASK) == 0);
iclogsize = log->l_iclog_size;
ASSERT(log->l_iclog_size >= 4096);
for (i=0; i < log->l_iclog_bufs; i++) {
- *iclogp = (xlog_in_core_t *)
- kmem_zalloc(sizeof(xlog_in_core_t), KM_SLEEP);
+ *iclogp = kmem_zalloc(sizeof(xlog_in_core_t), KM_MAYFAIL);
+ if (!*iclogp)
+ goto out_free_iclog;
+
iclog = *iclogp;
iclog->ic_prev = prev_iclog;
prev_iclog = iclog;
bp = xfs_buf_get_noaddr(log->l_iclog_size, mp->m_logdev_targp);
+ if (!bp)
+ goto out_free_iclog;
if (!XFS_BUF_CPSEMA(bp))
ASSERT(0);
XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
- XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb);
XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
iclog->ic_bp = bp;
- iclog->hic_data = bp->b_addr;
+ iclog->ic_data = bp->b_addr;
#ifdef DEBUG
log->l_iclog_bak[i] = (xfs_caddr_t)&(iclog->ic_header);
#endif
atomic_set(&iclog->ic_refcnt, 0);
spin_lock_init(&iclog->ic_callback_lock);
iclog->ic_callback_tail = &(iclog->ic_callback);
- iclog->ic_datap = (char *)iclog->hic_data + log->l_iclog_hsize;
+ iclog->ic_datap = (char *)iclog->ic_data + log->l_iclog_hsize;
ASSERT(XFS_BUF_ISBUSY(iclog->ic_bp));
ASSERT(XFS_BUF_VALUSEMA(iclog->ic_bp) <= 0);
sv_init(&iclog->ic_force_wait, SV_DEFAULT, "iclog-force");
sv_init(&iclog->ic_write_wait, SV_DEFAULT, "iclog-write");
- xlog_trace_iclog_alloc(iclog);
-
iclogp = &iclog->ic_next;
}
*iclogp = log->l_iclog; /* complete ring */
log->l_iclog->ic_prev = prev_iclog; /* re-write 1st prev ptr */
return log;
+
+out_free_iclog:
+ for (iclog = log->l_iclog; iclog; iclog = prev_iclog) {
+ prev_iclog = iclog->ic_next;
+ if (iclog->ic_bp) {
+ sv_destroy(&iclog->ic_force_wait);
+ sv_destroy(&iclog->ic_write_wait);
+ xfs_buf_free(iclog->ic_bp);
+ }
+ kmem_free(iclog);
+ }
+ spinlock_destroy(&log->l_icloglock);
+ spinlock_destroy(&log->l_grant_lock);
+ xfs_buf_free(log->l_xbuf);
+out_free_log:
+ kmem_free(log);
+out:
+ return ERR_PTR(-error);
} /* xlog_alloc_log */
reg[0].i_addr = NULL;
reg[0].i_len = 0;
- XLOG_VEC_SET_TYPE(®[0], XLOG_REG_TYPE_COMMIT);
+ reg[0].i_type = XLOG_REG_TYPE_COMMIT;
ASSERT_ALWAYS(iclog);
if ((error = xlog_write(mp, reg, 1, ticket, commitlsnp,
*/
if (threshold_lsn &&
!XLOG_FORCED_SHUTDOWN(log))
- xfs_trans_push_ail(mp, threshold_lsn);
+ xfs_trans_ail_push(log->l_ailp, threshold_lsn);
} /* xlog_grant_push_ail */
+/*
+ * The bdstrat callback function for log bufs. This gives us a central
+ * place to trap bufs in case we get hit by a log I/O error and need to
+ * shutdown. Actually, in practice, even when we didn't get a log error,
+ * we transition the iclogs to IOERROR state *after* flushing all existing
+ * iclogs to disk. This is because we don't want anymore new transactions to be
+ * started or completed afterwards.
+ */
+STATIC int
+xlog_bdstrat(
+ struct xfs_buf *bp)
+{
+ struct xlog_in_core *iclog;
+
+ iclog = XFS_BUF_FSPRIVATE(bp, xlog_in_core_t *);
+ if (iclog->ic_state & XLOG_STATE_IOERROR) {
+ XFS_BUF_ERROR(bp, EIO);
+ XFS_BUF_STALE(bp);
+ xfs_biodone(bp);
+ /*
+ * It would seem logical to return EIO here, but we rely on
+ * the log state machine to propagate I/O errors instead of
+ * doing it here.
+ */
+ return 0;
+ }
+
+ bp->b_flags |= _XBF_RUN_QUEUES;
+ xfs_buf_iorequest(bp);
+ return 0;
+}
/*
* Flush out the in-core log (iclog) to the on-disk log in an asynchronous
XFS_BUF_ZEROFLAGS(bp);
XFS_BUF_BUSY(bp);
XFS_BUF_ASYNC(bp);
+ bp->b_flags |= XBF_LOG_BUFFER;
/*
* Do an ordered write for the log block.
* Its unnecessary to flush the first split block in the log wrap case.
*/
XFS_BUF_WRITE(bp);
- if ((error = XFS_bwrite(bp))) {
+ if ((error = xlog_bdstrat(bp))) {
xfs_ioerror_alert("xlog_sync", log->l_mp, bp,
XFS_BUF_ADDR(bp));
return error;
XFS_BUF_ZEROFLAGS(bp);
XFS_BUF_BUSY(bp);
XFS_BUF_ASYNC(bp);
+ bp->b_flags |= XBF_LOG_BUFFER;
if (log->l_mp->m_flags & XFS_MOUNT_BARRIER)
XFS_BUF_ORDERED(bp);
dptr = XFS_BUF_PTR(bp);
/* account for internal log which doesn't start at block #0 */
XFS_BUF_SET_ADDR(bp, XFS_BUF_ADDR(bp) + log->l_logBBstart);
XFS_BUF_WRITE(bp);
- if ((error = XFS_bwrite(bp))) {
+ if ((error = xlog_bdstrat(bp))) {
xfs_ioerror_alert("xlog_sync (split)", log->l_mp,
bp, XFS_BUF_ADDR(bp));
return error;
sv_destroy(&iclog->ic_force_wait);
sv_destroy(&iclog->ic_write_wait);
xfs_buf_free(iclog->ic_bp);
- xlog_trace_iclog_dealloc(iclog);
next_iclog = iclog->ic_next;
kmem_free(iclog);
iclog = next_iclog;
spinlock_destroy(&log->l_grant_lock);
xfs_buf_free(log->l_xbuf);
- xlog_trace_loggrant_dealloc(log);
log->l_mp->m_log = NULL;
kmem_free(log);
} /* xlog_dealloc_log */
* bytes have been written out.
*/
STATIC int
-xlog_write(xfs_mount_t * mp,
- xfs_log_iovec_t reg[],
- int nentries,
- xfs_log_ticket_t tic,
- xfs_lsn_t *start_lsn,
- xlog_in_core_t **commit_iclog,
- uint flags)
+xlog_write(
+ struct xfs_mount *mp,
+ struct xfs_log_iovec reg[],
+ int nentries,
+ struct xlog_ticket *ticket,
+ xfs_lsn_t *start_lsn,
+ struct xlog_in_core **commit_iclog,
+ uint flags)
{
xlog_t *log = mp->m_log;
- xlog_ticket_t *ticket = (xlog_ticket_t *)tic;
xlog_in_core_t *iclog = NULL; /* ptr to current in-core log */
xlog_op_header_t *logop_head; /* ptr to log operation header */
__psint_t ptr; /* copy address into data region */
default:
xfs_fs_cmn_err(CE_WARN, mp,
"Bad XFS transaction clientid 0x%x in ticket 0x%p",
- logop_head->oh_clientid, tic);
+ logop_head->oh_clientid, ticket);
return XFS_ERROR(EIO);
}
if (iclog->ic_size - log_offset <= sizeof(xlog_op_header_t)) {
xlog_state_finish_copy(log, iclog, record_cnt, data_cnt);
record_cnt = data_cnt = 0;
+ spin_lock(&log->l_icloglock);
xlog_state_want_sync(log, iclog);
+ spin_unlock(&log->l_icloglock);
if (commit_iclog) {
ASSERT(flags & XLOG_COMMIT_TRANS);
*commit_iclog = iclog;
iclog = log->l_iclog;
if (iclog->ic_state != XLOG_STATE_ACTIVE) {
- xlog_trace_iclog(iclog, XLOG_TRACE_SLEEP_FLUSH);
XFS_STATS_INC(xs_log_noiclogs);
/* Wait for log writes to have flushed */
/* Is there space or do we need to sleep? */
spin_lock(&log->l_grant_lock);
- xlog_trace_loggrant(log, tic, "xlog_grant_log_space: enter");
+
+ trace_xfs_log_grant_enter(log, tic);
/* something is already sleeping; insert new transaction at end */
if (log->l_reserve_headq) {
xlog_ins_ticketq(&log->l_reserve_headq, tic);
- xlog_trace_loggrant(log, tic,
- "xlog_grant_log_space: sleep 1");
+
+ trace_xfs_log_grant_sleep1(log, tic);
+
/*
* Gotta check this before going to sleep, while we're
* holding the grant lock.
* If we got an error, and the filesystem is shutting down,
* we'll catch it down below. So just continue...
*/
- xlog_trace_loggrant(log, tic,
- "xlog_grant_log_space: wake 1");
+ trace_xfs_log_grant_wake1(log, tic);
spin_lock(&log->l_grant_lock);
}
if (tic->t_flags & XFS_LOG_PERM_RESERV)
if (free_bytes < need_bytes) {
if ((tic->t_flags & XLOG_TIC_IN_Q) == 0)
xlog_ins_ticketq(&log->l_reserve_headq, tic);
- xlog_trace_loggrant(log, tic,
- "xlog_grant_log_space: sleep 2");
+
+ trace_xfs_log_grant_sleep2(log, tic);
+
+ spin_unlock(&log->l_grant_lock);
+ xlog_grant_push_ail(log->l_mp, need_bytes);
+ spin_lock(&log->l_grant_lock);
+
XFS_STATS_INC(xs_sleep_logspace);
sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s);
- if (XLOG_FORCED_SHUTDOWN(log)) {
- spin_lock(&log->l_grant_lock);
+ spin_lock(&log->l_grant_lock);
+ if (XLOG_FORCED_SHUTDOWN(log))
goto error_return;
- }
- xlog_trace_loggrant(log, tic,
- "xlog_grant_log_space: wake 2");
- xlog_grant_push_ail(log->l_mp, need_bytes);
- spin_lock(&log->l_grant_lock);
+ trace_xfs_log_grant_wake2(log, tic);
+
goto redo;
} else if (tic->t_flags & XLOG_TIC_IN_Q)
xlog_del_ticketq(&log->l_reserve_headq, tic);
ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn)));
}
#endif
- xlog_trace_loggrant(log, tic, "xlog_grant_log_space: exit");
+ trace_xfs_log_grant_exit(log, tic);
xlog_verify_grant_head(log, 1);
spin_unlock(&log->l_grant_lock);
return 0;
error_return:
if (tic->t_flags & XLOG_TIC_IN_Q)
xlog_del_ticketq(&log->l_reserve_headq, tic);
- xlog_trace_loggrant(log, tic, "xlog_grant_log_space: err_ret");
+
+ trace_xfs_log_grant_error(log, tic);
+
/*
* If we are failing, make sure the ticket doesn't have any
* current reservations. We don't want to add this back when
#endif
spin_lock(&log->l_grant_lock);
- xlog_trace_loggrant(log, tic, "xlog_regrant_write_log_space: enter");
+
+ trace_xfs_log_regrant_write_enter(log, tic);
if (XLOG_FORCED_SHUTDOWN(log))
goto error_return;
* for more free space, otherwise try to get some space for
* this transaction.
*/
-
+ need_bytes = tic->t_unit_res;
if ((ntic = log->l_write_headq)) {
free_bytes = xlog_space_left(log, log->l_grant_write_cycle,
log->l_grant_write_bytes);
if ((tic->t_flags & XLOG_TIC_IN_Q) == 0)
xlog_ins_ticketq(&log->l_write_headq, tic);
- xlog_trace_loggrant(log, tic,
- "xlog_regrant_write_log_space: sleep 1");
+ trace_xfs_log_regrant_write_sleep1(log, tic);
+
+ spin_unlock(&log->l_grant_lock);
+ xlog_grant_push_ail(log->l_mp, need_bytes);
+ spin_lock(&log->l_grant_lock);
+
XFS_STATS_INC(xs_sleep_logspace);
sv_wait(&tic->t_wait, PINOD|PLTWAIT,
&log->l_grant_lock, s);
/* If we're shutting down, this tic is already
* off the queue */
- if (XLOG_FORCED_SHUTDOWN(log)) {
- spin_lock(&log->l_grant_lock);
+ spin_lock(&log->l_grant_lock);
+ if (XLOG_FORCED_SHUTDOWN(log))
goto error_return;
- }
- xlog_trace_loggrant(log, tic,
- "xlog_regrant_write_log_space: wake 1");
- xlog_grant_push_ail(log->l_mp, tic->t_unit_res);
- spin_lock(&log->l_grant_lock);
+ trace_xfs_log_regrant_write_wake1(log, tic);
}
}
- need_bytes = tic->t_unit_res;
-
redo:
if (XLOG_FORCED_SHUTDOWN(log))
goto error_return;
if (free_bytes < need_bytes) {
if ((tic->t_flags & XLOG_TIC_IN_Q) == 0)
xlog_ins_ticketq(&log->l_write_headq, tic);
+ spin_unlock(&log->l_grant_lock);
+ xlog_grant_push_ail(log->l_mp, need_bytes);
+ spin_lock(&log->l_grant_lock);
+
XFS_STATS_INC(xs_sleep_logspace);
+ trace_xfs_log_regrant_write_sleep2(log, tic);
+
sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s);
/* If we're shutting down, this tic is already off the queue */
- if (XLOG_FORCED_SHUTDOWN(log)) {
- spin_lock(&log->l_grant_lock);
+ spin_lock(&log->l_grant_lock);
+ if (XLOG_FORCED_SHUTDOWN(log))
goto error_return;
- }
- xlog_trace_loggrant(log, tic,
- "xlog_regrant_write_log_space: wake 2");
- xlog_grant_push_ail(log->l_mp, need_bytes);
- spin_lock(&log->l_grant_lock);
+ trace_xfs_log_regrant_write_wake2(log, tic);
goto redo;
} else if (tic->t_flags & XLOG_TIC_IN_Q)
xlog_del_ticketq(&log->l_write_headq, tic);
}
#endif
- xlog_trace_loggrant(log, tic, "xlog_regrant_write_log_space: exit");
+ trace_xfs_log_regrant_write_exit(log, tic);
+
xlog_verify_grant_head(log, 1);
spin_unlock(&log->l_grant_lock);
return 0;
error_return:
if (tic->t_flags & XLOG_TIC_IN_Q)
xlog_del_ticketq(&log->l_reserve_headq, tic);
- xlog_trace_loggrant(log, tic, "xlog_regrant_write_log_space: err_ret");
+
+ trace_xfs_log_regrant_write_error(log, tic);
+
/*
* If we are failing, make sure the ticket doesn't have any
* current reservations. We don't want to add this back when
xlog_regrant_reserve_log_space(xlog_t *log,
xlog_ticket_t *ticket)
{
- xlog_trace_loggrant(log, ticket,
- "xlog_regrant_reserve_log_space: enter");
+ trace_xfs_log_regrant_reserve_enter(log, ticket);
+
if (ticket->t_cnt > 0)
ticket->t_cnt--;
xlog_grant_sub_space(log, ticket->t_curr_res);
ticket->t_curr_res = ticket->t_unit_res;
xlog_tic_reset_res(ticket);
- xlog_trace_loggrant(log, ticket,
- "xlog_regrant_reserve_log_space: sub current res");
+
+ trace_xfs_log_regrant_reserve_sub(log, ticket);
+
xlog_verify_grant_head(log, 1);
/* just return if we still have some of the pre-reserved space */
}
xlog_grant_add_space_reserve(log, ticket->t_unit_res);
- xlog_trace_loggrant(log, ticket,
- "xlog_regrant_reserve_log_space: exit");
+
+ trace_xfs_log_regrant_reserve_exit(log, ticket);
+
xlog_verify_grant_head(log, 0);
spin_unlock(&log->l_grant_lock);
ticket->t_curr_res = ticket->t_unit_res;
ticket->t_cnt--;
spin_lock(&log->l_grant_lock);
- xlog_trace_loggrant(log, ticket, "xlog_ungrant_log_space: enter");
+ trace_xfs_log_ungrant_enter(log, ticket);
xlog_grant_sub_space(log, ticket->t_curr_res);
- xlog_trace_loggrant(log, ticket, "xlog_ungrant_log_space: sub current");
+ trace_xfs_log_ungrant_sub(log, ticket);
/* If this is a permanent reservation ticket, we may be able to free
* up more space based on the remaining count.
xlog_grant_sub_space(log, ticket->t_unit_res*ticket->t_cnt);
}
- xlog_trace_loggrant(log, ticket, "xlog_ungrant_log_space: exit");
+ trace_xfs_log_ungrant_exit(log, ticket);
+
xlog_verify_grant_head(log, 1);
spin_unlock(&log->l_grant_lock);
xfs_log_move_tail(log->l_mp, 1);
log->l_iclog = iclog->ic_next;
} /* xlog_state_switch_iclogs */
-
/*
* Write out all data in the in-core log as of this exact moment in time.
*
* b) when we return from flushing out this iclog, it is still
* not in the active nor dirty state.
*/
-STATIC int
-xlog_state_sync_all(xlog_t *log, uint flags, int *log_flushed)
+int
+_xfs_log_force(
+ struct xfs_mount *mp,
+ uint flags,
+ int *log_flushed)
{
- xlog_in_core_t *iclog;
- xfs_lsn_t lsn;
+ struct log *log = mp->m_log;
+ struct xlog_in_core *iclog;
+ xfs_lsn_t lsn;
+
+ XFS_STATS_INC(xs_log_force);
spin_lock(&log->l_icloglock);
if (xlog_state_release_iclog(log, iclog))
return XFS_ERROR(EIO);
- *log_flushed = 1;
+
+ if (log_flushed)
+ *log_flushed = 1;
spin_lock(&log->l_icloglock);
if (be64_to_cpu(iclog->ic_header.h_lsn) == lsn &&
iclog->ic_state != XLOG_STATE_DIRTY)
*/
if (iclog->ic_state & XLOG_STATE_IOERROR)
return XFS_ERROR(EIO);
- *log_flushed = 1;
-
+ if (log_flushed)
+ *log_flushed = 1;
} else {
no_sleep:
spin_unlock(&log->l_icloglock);
}
return 0;
-} /* xlog_state_sync_all */
+}
+
+/*
+ * Wrapper for _xfs_log_force(), to be used when caller doesn't care
+ * about errors or whether the log was flushed or not. This is the normal
+ * interface to use when trying to unpin items or move the log forward.
+ */
+void
+xfs_log_force(
+ xfs_mount_t *mp,
+ uint flags)
+{
+ int error;
+ error = _xfs_log_force(mp, flags, NULL);
+ if (error) {
+ xfs_fs_cmn_err(CE_WARN, mp, "xfs_log_force: "
+ "error %d returned.", error);
+ }
+}
/*
- * Used by code which implements synchronous log forces.
+ * Force the in-core log to disk for a specific LSN.
*
* Find in-core log with lsn.
* If it is in the DIRTY state, just return.
* state and go to sleep or return.
* If it is in any other state, go to sleep or return.
*
- * If filesystem activity goes to zero, the iclog will get flushed only by
- * bdflush().
+ * Synchronous forces are implemented with a signal variable. All callers
+ * to force a given lsn to disk will wait on a the sv attached to the
+ * specific in-core log. When given in-core log finally completes its
+ * write to disk, that thread will wake up all threads waiting on the
+ * sv.
*/
-STATIC int
-xlog_state_sync(xlog_t *log,
- xfs_lsn_t lsn,
- uint flags,
- int *log_flushed)
+int
+_xfs_log_force_lsn(
+ struct xfs_mount *mp,
+ xfs_lsn_t lsn,
+ uint flags,
+ int *log_flushed)
{
- xlog_in_core_t *iclog;
- int already_slept = 0;
+ struct log *log = mp->m_log;
+ struct xlog_in_core *iclog;
+ int already_slept = 0;
-try_again:
- spin_lock(&log->l_icloglock);
- iclog = log->l_iclog;
-
- if (iclog->ic_state & XLOG_STATE_IOERROR) {
- spin_unlock(&log->l_icloglock);
- return XFS_ERROR(EIO);
- }
+ ASSERT(lsn != 0);
- do {
- if (be64_to_cpu(iclog->ic_header.h_lsn) != lsn) {
- iclog = iclog->ic_next;
- continue;
- }
+ XFS_STATS_INC(xs_log_force);
- if (iclog->ic_state == XLOG_STATE_DIRTY) {
+try_again:
+ spin_lock(&log->l_icloglock);
+ iclog = log->l_iclog;
+ if (iclog->ic_state & XLOG_STATE_IOERROR) {
spin_unlock(&log->l_icloglock);
- return 0;
+ return XFS_ERROR(EIO);
}
- if (iclog->ic_state == XLOG_STATE_ACTIVE) {
- /*
- * We sleep here if we haven't already slept (e.g.
- * this is the first time we've looked at the correct
- * iclog buf) and the buffer before us is going to
- * be sync'ed. The reason for this is that if we
- * are doing sync transactions here, by waiting for
- * the previous I/O to complete, we can allow a few
- * more transactions into this iclog before we close
- * it down.
- *
- * Otherwise, we mark the buffer WANT_SYNC, and bump
- * up the refcnt so we can release the log (which drops
- * the ref count). The state switch keeps new transaction
- * commits from using this buffer. When the current commits
- * finish writing into the buffer, the refcount will drop to
- * zero and the buffer will go out then.
- */
- if (!already_slept &&
- (iclog->ic_prev->ic_state & (XLOG_STATE_WANT_SYNC |
- XLOG_STATE_SYNCING))) {
- ASSERT(!(iclog->ic_state & XLOG_STATE_IOERROR));
- XFS_STATS_INC(xs_log_force_sleep);
- sv_wait(&iclog->ic_prev->ic_write_wait, PSWP,
- &log->l_icloglock, s);
- *log_flushed = 1;
- already_slept = 1;
- goto try_again;
- } else {
+ do {
+ if (be64_to_cpu(iclog->ic_header.h_lsn) != lsn) {
+ iclog = iclog->ic_next;
+ continue;
+ }
+
+ if (iclog->ic_state == XLOG_STATE_DIRTY) {
+ spin_unlock(&log->l_icloglock);
+ return 0;
+ }
+
+ if (iclog->ic_state == XLOG_STATE_ACTIVE) {
+ /*
+ * We sleep here if we haven't already slept (e.g.
+ * this is the first time we've looked at the correct
+ * iclog buf) and the buffer before us is going to
+ * be sync'ed. The reason for this is that if we
+ * are doing sync transactions here, by waiting for
+ * the previous I/O to complete, we can allow a few
+ * more transactions into this iclog before we close
+ * it down.
+ *
+ * Otherwise, we mark the buffer WANT_SYNC, and bump
+ * up the refcnt so we can release the log (which
+ * drops the ref count). The state switch keeps new
+ * transaction commits from using this buffer. When
+ * the current commits finish writing into the buffer,
+ * the refcount will drop to zero and the buffer will
+ * go out then.
+ */
+ if (!already_slept &&
+ (iclog->ic_prev->ic_state &
+ (XLOG_STATE_WANT_SYNC | XLOG_STATE_SYNCING))) {
+ ASSERT(!(iclog->ic_state & XLOG_STATE_IOERROR));
+
+ XFS_STATS_INC(xs_log_force_sleep);
+
+ sv_wait(&iclog->ic_prev->ic_write_wait,
+ PSWP, &log->l_icloglock, s);
+ if (log_flushed)
+ *log_flushed = 1;
+ already_slept = 1;
+ goto try_again;
+ }
atomic_inc(&iclog->ic_refcnt);
xlog_state_switch_iclogs(log, iclog, 0);
spin_unlock(&log->l_icloglock);
if (xlog_state_release_iclog(log, iclog))
return XFS_ERROR(EIO);
- *log_flushed = 1;
+ if (log_flushed)
+ *log_flushed = 1;
spin_lock(&log->l_icloglock);
}
- }
- if ((flags & XFS_LOG_SYNC) && /* sleep */
- !(iclog->ic_state & (XLOG_STATE_ACTIVE | XLOG_STATE_DIRTY))) {
+ if ((flags & XFS_LOG_SYNC) && /* sleep */
+ !(iclog->ic_state &
+ (XLOG_STATE_ACTIVE | XLOG_STATE_DIRTY))) {
+ /*
+ * Don't wait on completion if we know that we've
+ * gotten a log write error.
+ */
+ if (iclog->ic_state & XLOG_STATE_IOERROR) {
+ spin_unlock(&log->l_icloglock);
+ return XFS_ERROR(EIO);
+ }
+ XFS_STATS_INC(xs_log_force_sleep);
+ sv_wait(&iclog->ic_force_wait, PSWP, &log->l_icloglock, s);
+ /*
+ * No need to grab the log lock here since we're
+ * only deciding whether or not to return EIO
+ * and the memory read should be atomic.
+ */
+ if (iclog->ic_state & XLOG_STATE_IOERROR)
+ return XFS_ERROR(EIO);
- /*
- * Don't wait on completion if we know that we've
- * gotten a log write error.
- */
- if (iclog->ic_state & XLOG_STATE_IOERROR) {
+ if (log_flushed)
+ *log_flushed = 1;
+ } else { /* just return */
spin_unlock(&log->l_icloglock);
- return XFS_ERROR(EIO);
}
- XFS_STATS_INC(xs_log_force_sleep);
- sv_wait(&iclog->ic_force_wait, PSWP, &log->l_icloglock, s);
- /*
- * No need to grab the log lock here since we're
- * only deciding whether or not to return EIO
- * and the memory read should be atomic.
- */
- if (iclog->ic_state & XLOG_STATE_IOERROR)
- return XFS_ERROR(EIO);
- *log_flushed = 1;
- } else { /* just return */
- spin_unlock(&log->l_icloglock);
- }
- return 0;
- } while (iclog != log->l_iclog);
+ return 0;
+ } while (iclog != log->l_iclog);
- spin_unlock(&log->l_icloglock);
- return 0;
-} /* xlog_state_sync */
+ spin_unlock(&log->l_icloglock);
+ return 0;
+}
+
+/*
+ * Wrapper for _xfs_log_force_lsn(), to be used when caller doesn't care
+ * about errors or whether the log was flushed or not. This is the normal
+ * interface to use when trying to unpin items or move the log forward.
+ */
+void
+xfs_log_force_lsn(
+ xfs_mount_t *mp,
+ xfs_lsn_t lsn,
+ uint flags)
+{
+ int error;
+ error = _xfs_log_force_lsn(mp, lsn, flags, NULL);
+ if (error) {
+ xfs_fs_cmn_err(CE_WARN, mp, "xfs_log_force: "
+ "error %d returned.", error);
+ }
+}
/*
* Called when we want to mark the current iclog as being ready to sync to
STATIC void
xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog)
{
- spin_lock(&log->l_icloglock);
+ assert_spin_locked(&log->l_icloglock);
if (iclog->ic_state == XLOG_STATE_ACTIVE) {
xlog_state_switch_iclogs(log, iclog, 0);
ASSERT(iclog->ic_state &
(XLOG_STATE_WANT_SYNC|XLOG_STATE_IOERROR));
}
-
- spin_unlock(&log->l_icloglock);
-} /* xlog_state_want_sync */
-
+}
/*****************************************************************************
*/
/*
- * Free a used ticket.
+ * Free a used ticket when its refcount falls to zero.
*/
-STATIC void
-xlog_ticket_put(xlog_t *log,
- xlog_ticket_t *ticket)
+void
+xfs_log_ticket_put(
+ xlog_ticket_t *ticket)
{
- sv_destroy(&ticket->t_wait);
- kmem_zone_free(xfs_log_ticket_zone, ticket);
-} /* xlog_ticket_put */
+ ASSERT(atomic_read(&ticket->t_ref) > 0);
+ if (atomic_dec_and_test(&ticket->t_ref)) {
+ sv_destroy(&ticket->t_wait);
+ kmem_zone_free(xfs_log_ticket_zone, ticket);
+ }
+}
+xlog_ticket_t *
+xfs_log_ticket_get(
+ xlog_ticket_t *ticket)
+{
+ ASSERT(atomic_read(&ticket->t_ref) > 0);
+ atomic_inc(&ticket->t_ref);
+ return ticket;
+}
/*
* Allocate and initialise a new log ticket.
*/
STATIC xlog_ticket_t *
-xlog_ticket_get(xlog_t *log,
+xlog_ticket_alloc(xlog_t *log,
int unit_bytes,
int cnt,
char client,
unit_bytes += 2*BBSIZE;
}
+ atomic_set(&tic->t_ref, 1);
tic->t_unit_res = unit_bytes;
tic->t_curr_res = unit_bytes;
tic->t_cnt = cnt;
xlog_tic_reset_res(tic);
return tic;
-} /* xlog_ticket_get */
+}
/******************************************************************************
ptr = iclog->ic_datap;
base_ptr = ptr;
ophead = (xlog_op_header_t *)ptr;
- xhdr = (xlog_in_core_2_t *)&iclog->ic_header;
+ xhdr = iclog->ic_data;
for (i = 0; i < len; i++) {
ophead = (xlog_op_header_t *)ptr;
xlog_ticket_t *tic;
xlog_t *log;
int retval;
- int dummy;
log = mp->m_log;
if (!log ||
log->l_flags & XLOG_ACTIVE_RECOVERY) {
mp->m_flags |= XFS_MOUNT_FS_SHUTDOWN;
- XFS_BUF_DONE(mp->m_sb_bp);
+ if (mp->m_sb_bp)
+ XFS_BUF_DONE(mp->m_sb_bp);
return 0;
}
spin_lock(&log->l_icloglock);
spin_lock(&log->l_grant_lock);
mp->m_flags |= XFS_MOUNT_FS_SHUTDOWN;
- XFS_BUF_DONE(mp->m_sb_bp);
+ if (mp->m_sb_bp)
+ XFS_BUF_DONE(mp->m_sb_bp);
+
/*
* This flag is sort of redundant because of the mount flag, but
* it's good to maintain the separation between the log and the rest
}
spin_unlock(&log->l_grant_lock);
- if (! (log->l_iclog->ic_state & XLOG_STATE_IOERROR)) {
+ if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) {
ASSERT(!logerror);
/*
* Force the incore logs to disk before shutting the
* log down completely.
*/
- xlog_state_sync_all(log, XFS_LOG_FORCE|XFS_LOG_SYNC, &dummy);
+ _xfs_log_force(mp, XFS_LOG_SYNC, NULL);
+
spin_lock(&log->l_icloglock);
retval = xlog_state_ioerror(log);
spin_unlock(&log->l_icloglock);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff