diff options
Diffstat (limited to 'fs/xfs/xfs_log.c')
| -rw-r--r-- | fs/xfs/xfs_log.c | 1303 |
1 files changed, 776 insertions, 527 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 600b5b06aaeb..5215abc8023a 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -44,14 +44,8 @@ kmem_zone_t *xfs_log_ticket_zone; -#define xlog_write_adv_cnt(ptr, len, off, bytes) \ - { (ptr) += (bytes); \ - (len) -= (bytes); \ - (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, +STATIC int xlog_commit_record(struct log *log, struct xlog_ticket *ticket, xlog_in_core_t **, xfs_lsn_t *); STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, xfs_buftarg_t *log_target, @@ -60,11 +54,6 @@ STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, STATIC int xlog_space_left(xlog_t *log, int cycle, int bytes); 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, - xfs_lsn_t *start_lsn, - xlog_in_core_t **commit_iclog, - uint flags); /* local state machine functions */ STATIC void xlog_state_done_syncing(xlog_in_core_t *iclog, int); @@ -80,11 +69,6 @@ STATIC int xlog_state_release_iclog(xlog_t *log, 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 */ @@ -99,16 +83,8 @@ STATIC int xlog_regrant_write_log_space(xlog_t *log, STATIC void xlog_ungrant_log_space(xlog_t *log, xlog_ticket_t *ticket); - -/* local ticket functions */ -STATIC xlog_ticket_t *xlog_ticket_alloc(xlog_t *log, - int unit_bytes, - int count, - char clientid, - uint flags); - #if defined(DEBUG) -STATIC void xlog_verify_dest_ptr(xlog_t *log, __psint_t ptr); +STATIC void xlog_verify_dest_ptr(xlog_t *log, char *ptr); STATIC void xlog_verify_grant_head(xlog_t *log, int equals); STATIC void xlog_verify_iclog(xlog_t *log, xlog_in_core_t *iclog, int count, boolean_t syncing); @@ -249,14 +225,14 @@ xlog_tic_add_region(xlog_ticket_t *tic, uint len, uint type) * 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) || /* @@ -264,8 +240,7 @@ xfs_log_done(xfs_mount_t *mp, * 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(log, ticket, iclog, &lsn)))) { lsn = (xfs_lsn_t) -1; if (ticket->t_flags & XLOG_TIC_PERM_RESERV) { flags |= XFS_LOG_REL_PERM_RESERV; @@ -295,67 +270,8 @@ xfs_log_done(xfs_mount_t *mp, } 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 @@ -363,11 +279,11 @@ xfs_log_force( * 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); @@ -381,16 +297,14 @@ xfs_log_notify(xfs_mount_t *mp, /* mount of partition */ } 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; } @@ -409,17 +323,18 @@ xfs_log_release_iclog(xfs_mount_t *mp, * 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); @@ -432,7 +347,16 @@ xfs_log_reserve(xfs_mount_t *mp, if (*ticket != NULL) { ASSERT(flags & XFS_LOG_PERM_RESERV); - internal_ticket = (xlog_ticket_t *)*ticket; + internal_ticket = *ticket; + + /* + * this is a new transaction on the ticket, so we need to + * change the transaction ID so that the next transaction has a + * different TID in the log. Just add one to the existing tid + * so that we can see chains of rolling transactions in the log + * easily. + */ + internal_ticket->t_tid++; trace_xfs_log_reserve(log, internal_ticket); @@ -441,7 +365,8 @@ xfs_log_reserve(xfs_mount_t *mp, } else { /* may sleep if need to allocate more tickets */ internal_ticket = xlog_ticket_alloc(log, unit_bytes, cnt, - client, flags); + client, flags, + KM_SLEEP|KM_MAYFAIL); if (!internal_ticket) return XFS_ERROR(ENOMEM); internal_ticket->t_trans_type = t_type; @@ -526,6 +451,13 @@ xfs_log_mount( /* Normal transactions can now occur */ mp->m_log->l_flags &= ~XLOG_ACTIVE_RECOVERY; + /* + * Now the log has been fully initialised and we know were our + * space grant counters are, we can initialise the permanent ticket + * needed for delayed logging to work. + */ + xlog_cil_init_post_recovery(mp->m_log); + return 0; out_destroy_ail: @@ -583,18 +515,10 @@ xfs_log_unmount_write(xfs_mount_t *mp) #ifdef DEBUG 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; - /* the data section must be 32 bit size aligned */ - struct { - __uint16_t magic; - __uint16_t pad1; - __uint32_t pad2; /* may as well make it 64 bits */ - } magic = { XLOG_UNMOUNT_TYPE, 0, 0 }; - /* * Don't write out unmount record on read-only mounts. * Or, if we are doing a forced umount (typically because of IO errors). @@ -602,7 +526,7 @@ xfs_log_unmount_write(xfs_mount_t *mp) 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 @@ -616,16 +540,30 @@ xfs_log_unmount_write(xfs_mount_t *mp) } while (iclog != first_iclog); #endif 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); - error = xfs_log_reserve(mp, 600, 1, &tic, XFS_LOG, 0, XLOG_UNMOUNT_REC_TYPE); if (!error) { + /* the data section must be 32 bit size aligned */ + struct { + __uint16_t magic; + __uint16_t pad1; + __uint32_t pad2; /* may as well make it 64 bits */ + } magic = { + .magic = XLOG_UNMOUNT_TYPE, + }; + struct xfs_log_iovec reg = { + .i_addr = (void *)&magic, + .i_len = sizeof(magic), + .i_type = XLOG_REG_TYPE_UNMOUNT, + }; + struct xfs_log_vec vec = { + .lv_niovecs = 1, + .lv_iovecp = ®, + }; + /* remove inited flag */ - ((xlog_ticket_t *)tic)->t_flags = 0; - error = xlog_write(mp, reg, 1, tic, &lsn, + tic->t_flags = 0; + error = xlog_write(log, &vec, tic, &lsn, NULL, XLOG_UNMOUNT_TRANS); /* * At this point, we're umounting anyway, @@ -715,30 +653,54 @@ xfs_log_unmount(xfs_mount_t *mp) xlog_dealloc_log(mp->m_log); } +void +xfs_log_item_init( + struct xfs_mount *mp, + struct xfs_log_item *item, + int type, + struct xfs_item_ops *ops) +{ + item->li_mountp = mp; + item->li_ailp = mp->m_ail; + item->li_type = type; + item->li_ops = ops; + item->li_lv = NULL; + + INIT_LIST_HEAD(&item->li_ail); + INIT_LIST_HEAD(&item->li_cil); +} + /* * Write region vectors to log. The write happens using the space reservation * of the ticket (tic). It is not a requirement that all writes for a given - * transaction occur with one call to xfs_log_write(). + * transaction occur with one call to xfs_log_write(). However, it is important + * to note that the transaction reservation code makes an assumption about the + * number of log headers a transaction requires that may be violated if you + * don't pass all the transaction vectors in one call.... */ 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; + struct xfs_log_vec vec = { + .lv_niovecs = nentries, + .lv_iovecp = reg, + }; if (XLOG_FORCED_SHUTDOWN(log)) return XFS_ERROR(EIO); - if ((error = xlog_write(mp, reg, nentries, tic, start_lsn, NULL, 0))) { + error = xlog_write(log, &vec, 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, @@ -812,9 +774,16 @@ 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) @@ -826,17 +795,24 @@ 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(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 { - 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; @@ -988,35 +964,6 @@ xlog_iodone(xfs_buf_t *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_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. @@ -1102,6 +1049,7 @@ xlog_alloc_log(xfs_mount_t *mp, int i; int iclogsize; int error = ENOMEM; + uint log2_size = 0; log = kmem_zalloc(sizeof(xlog_t), KM_MAYFAIL); if (!log) { @@ -1127,29 +1075,30 @@ xlog_alloc_log(xfs_mount_t *mp, error = EFSCORRUPTED; if (xfs_sb_version_hassector(&mp->m_sb)) { - log->l_sectbb_log = mp->m_sb.sb_logsectlog - BBSHIFT; - 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); + log2_size = mp->m_sb.sb_logsectlog; + if (log2_size < BBSHIFT) { + xlog_warn("XFS: Log sector size too small " + "(0x%x < 0x%x)", log2_size, BBSHIFT); goto out_free_log; } - /* for larger sector sizes, must have v2 or external log */ - 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); + log2_size -= BBSHIFT; + if (log2_size > mp->m_sectbb_log) { + xlog_warn("XFS: Log sector size too large " + "(0x%x > 0x%x)", log2_size, mp->m_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); + + /* for larger sector sizes, must have v2 or external log */ + if (log2_size && log->l_logBBstart > 0 && + !xfs_sb_version_haslogv2(&mp->m_sb)) { + + xlog_warn("XFS: log sector size (0x%x) invalid " + "for configuration.", log2_size); goto out_free_log; } } - log->l_sectbb_mask = (1 << log->l_sectbb_log) - 1; + log->l_sectBBsize = 1 << log2_size; xlog_get_iclog_buffer_size(mp, log); @@ -1158,7 +1107,6 @@ xlog_alloc_log(xfs_mount_t *mp, 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); @@ -1196,7 +1144,6 @@ xlog_alloc_log(xfs_mount_t *mp, 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->ic_data = bp->b_addr; @@ -1231,6 +1178,9 @@ xlog_alloc_log(xfs_mount_t *mp, *iclogp = log->l_iclog; /* complete ring */ log->l_iclog->ic_prev = prev_iclog; /* re-write 1st prev ptr */ + error = xlog_cil_init(log); + if (error) + goto out_free_iclog; return log; out_free_iclog: @@ -1258,26 +1208,31 @@ out: * ticket. Return the lsn of the commit record. */ STATIC int -xlog_commit_record(xfs_mount_t *mp, - xlog_ticket_t *ticket, - xlog_in_core_t **iclog, - xfs_lsn_t *commitlsnp) +xlog_commit_record( + struct log *log, + struct xlog_ticket *ticket, + struct xlog_in_core **iclog, + xfs_lsn_t *commitlsnp) { - int error; - xfs_log_iovec_t reg[1]; - - reg[0].i_addr = NULL; - reg[0].i_len = 0; - XLOG_VEC_SET_TYPE(®[0], XLOG_REG_TYPE_COMMIT); + struct xfs_mount *mp = log->l_mp; + int error; + struct xfs_log_iovec reg = { + .i_addr = NULL, + .i_len = 0, + .i_type = XLOG_REG_TYPE_COMMIT, + }; + struct xfs_log_vec vec = { + .lv_niovecs = 1, + .lv_iovecp = ®, + }; ASSERT_ALWAYS(iclog); - if ((error = xlog_write(mp, reg, 1, ticket, commitlsnp, - iclog, XLOG_COMMIT_TRANS))) { + error = xlog_write(log, &vec, ticket, commitlsnp, iclog, + XLOG_COMMIT_TRANS); + if (error) xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR); - } return error; -} /* xlog_commit_record */ - +} /* * Push on the buffer cache code if we ever use more than 75% of the on-disk @@ -1343,6 +1298,37 @@ xlog_grant_push_ail(xfs_mount_t *mp, 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 @@ -1462,7 +1448,7 @@ xlog_sync(xlog_t *log, */ 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; @@ -1502,7 +1488,7 @@ xlog_sync(xlog_t *log, /* 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; @@ -1521,6 +1507,8 @@ xlog_dealloc_log(xlog_t *log) xlog_in_core_t *iclog, *next_iclog; int i; + xlog_cil_destroy(log); + iclog = log->l_iclog; for (i=0; i<log->l_iclog_bufs; i++) { sv_destroy(&iclog->ic_force_wait); @@ -1563,8 +1551,10 @@ xlog_state_finish_copy(xlog_t *log, * print out info relating to regions written which consume * the reservation */ -STATIC void -xlog_print_tic_res(xfs_mount_t *mp, xlog_ticket_t *ticket) +void +xlog_print_tic_res( + struct xfs_mount *mp, + struct xlog_ticket *ticket) { uint i; uint ophdr_spc = ticket->t_res_num_ophdrs * (uint)sizeof(xlog_op_header_t); @@ -1664,6 +1654,196 @@ xlog_print_tic_res(xfs_mount_t *mp, xlog_ticket_t *ticket) "bad-rtype" : res_type_str[r_type-1]), ticket->t_res_arr[i].r_len); } + + xfs_cmn_err(XFS_PTAG_LOGRES, CE_ALERT, mp, + "xfs_log_write: reservation ran out. Need to up reservation"); + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); +} + +/* + * Calculate the potential space needed by the log vector. Each region gets + * its own xlog_op_header_t and may need to be double word aligned. + */ +static int +xlog_write_calc_vec_length( + struct xlog_ticket *ticket, + struct xfs_log_vec *log_vector) +{ + struct xfs_log_vec *lv; + int headers = 0; + int len = 0; + int i; + + /* acct for start rec of xact */ + if (ticket->t_flags & XLOG_TIC_INITED) + headers++; + + for (lv = log_vector; lv; lv = lv->lv_next) { + headers += lv->lv_niovecs; + + for (i = 0; i < lv->lv_niovecs; i++) { + struct xfs_log_iovec *vecp = &lv->lv_iovecp[i]; + + len += vecp->i_len; + xlog_tic_add_region(ticket, vecp->i_len, vecp->i_type); + } + } + + ticket->t_res_num_ophdrs += headers; + len += headers * sizeof(struct xlog_op_header); + + return len; +} + +/* + * If first write for transaction, insert start record We can't be trying to + * commit if we are inited. We can't have any "partial_copy" if we are inited. + */ +static int +xlog_write_start_rec( + struct xlog_op_header *ophdr, + struct xlog_ticket *ticket) +{ + if (!(ticket->t_flags & XLOG_TIC_INITED)) + return 0; + + ophdr->oh_tid = cpu_to_be32(ticket->t_tid); + ophdr->oh_clientid = ticket->t_clientid; + ophdr->oh_len = 0; + ophdr->oh_flags = XLOG_START_TRANS; + ophdr->oh_res2 = 0; + + ticket->t_flags &= ~XLOG_TIC_INITED; + + return sizeof(struct xlog_op_header); +} + +static xlog_op_header_t * +xlog_write_setup_ophdr( + struct log *log, + struct xlog_op_header *ophdr, + struct xlog_ticket *ticket, + uint flags) +{ + ophdr->oh_tid = cpu_to_be32(ticket->t_tid); + ophdr->oh_clientid = ticket->t_clientid; + ophdr->oh_res2 = 0; + + /* are we copying a commit or unmount record? */ + ophdr->oh_flags = flags; + + /* + * We've seen logs corrupted with bad transaction client ids. This + * makes sure that XFS doesn't generate them on. Turn this into an EIO + * and shut down the filesystem. + */ + switch (ophdr->oh_clientid) { + case XFS_TRANSACTION: + case XFS_VOLUME: + case XFS_LOG: + break; + default: + xfs_fs_cmn_err(CE_WARN, log->l_mp, + "Bad XFS transaction clientid 0x%x in ticket 0x%p", + ophdr->oh_clientid, ticket); + return NULL; + } + + return ophdr; +} + +/* + * Set up the parameters of the region copy into the log. This has + * to handle region write split across multiple log buffers - this + * state is kept external to this function so that this code can + * can be written in an obvious, self documenting manner. + */ +static int +xlog_write_setup_copy( + struct xlog_ticket *ticket, + struct xlog_op_header *ophdr, + int space_available, + int space_required, + int *copy_off, + int *copy_len, + int *last_was_partial_copy, + int *bytes_consumed) +{ + int still_to_copy; + + still_to_copy = space_required - *bytes_consumed; + *copy_off = *bytes_consumed; + + if (still_to_copy <= space_available) { + /* write of region completes here */ + *copy_len = still_to_copy; + ophdr->oh_len = cpu_to_be32(*copy_len); + if (*last_was_partial_copy) + ophdr->oh_flags |= (XLOG_END_TRANS|XLOG_WAS_CONT_TRANS); + *last_was_partial_copy = 0; + *bytes_consumed = 0; + return 0; + } + + /* partial write of region, needs extra log op header reservation */ + *copy_len = space_available; + ophdr->oh_len = cpu_to_be32(*copy_len); + ophdr->oh_flags |= XLOG_CONTINUE_TRANS; + if (*last_was_partial_copy) + ophdr->oh_flags |= XLOG_WAS_CONT_TRANS; + *bytes_consumed += *copy_len; + (*last_was_partial_copy)++; + + /* account for new log op header */ + ticket->t_curr_res -= sizeof(struct xlog_op_header); + ticket->t_res_num_ophdrs++; + + return sizeof(struct xlog_op_header); +} + +static int +xlog_write_copy_finish( + struct log *log, + struct xlog_in_core *iclog, + uint flags, + int *record_cnt, + int *data_cnt, + int *partial_copy, + int *partial_copy_len, + int log_offset, + struct xlog_in_core **commit_iclog) +{ + if (*partial_copy) { + /* + * This iclog has already been marked WANT_SYNC by + * xlog_state_get_iclog_space. + */ + xlog_state_finish_copy(log, iclog, *record_cnt, *data_cnt); + *record_cnt = 0; + *data_cnt = 0; + return xlog_state_release_iclog(log, iclog); + } + + *partial_copy = 0; + *partial_copy_len = 0; + + if (iclog->ic_size - log_offset <= sizeof(xlog_op_header_t)) { + /* no more space in this iclog - push it. */ + xlog_state_finish_copy(log, iclog, *record_cnt, *data_cnt); + *record_cnt = 0; + *data_cnt = 0; + + spin_lock(&log->l_icloglock); + xlog_state_want_sync(log, iclog); + spin_unlock(&log->l_icloglock); + + if (!commit_iclog) + return xlog_state_release_iclog(log, iclog); + ASSERT(flags & XLOG_COMMIT_TRANS); + *commit_iclog = iclog; + } + + return 0; } /* @@ -1706,211 +1886,163 @@ xlog_print_tic_res(xfs_mount_t *mp, xlog_ticket_t *ticket) * we don't update ic_offset until the end when we know exactly how many * 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_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 */ - int len; /* # xlog_write() bytes 2 still copy */ - int index; /* region index currently copying */ - int log_offset; /* offset (from 0) into data region */ - int start_rec_copy; /* # bytes to copy for start record */ - int partial_copy; /* did we split a region? */ - int partial_copy_len;/* # bytes copied if split region */ - int need_copy; /* # bytes need to memcpy this region */ - int copy_len; /* # bytes actually memcpy'ing */ - int copy_off; /* # bytes from entry start */ - int contwr; /* continued write of in-core log? */ - int error; - int record_cnt = 0, data_cnt = 0; - - partial_copy_len = partial_copy = 0; - - /* Calculate potential maximum space. Each region gets its own - * xlog_op_header_t and may need to be double word aligned. - */ - len = 0; - if (ticket->t_flags & XLOG_TIC_INITED) { /* acct for start rec of xact */ - len += sizeof(xlog_op_header_t); - ticket->t_res_num_ophdrs++; - } - - for (index = 0; index < nentries; index++) { - len += sizeof(xlog_op_header_t); /* each region gets >= 1 */ - ticket->t_res_num_ophdrs++; - len += reg[index].i_len; - xlog_tic_add_region(ticket, reg[index].i_len, reg[index].i_type); - } - contwr = *start_lsn = 0; +int +xlog_write( + struct log *log, + struct xfs_log_vec *log_vector, + struct xlog_ticket *ticket, + xfs_lsn_t *start_lsn, + struct xlog_in_core **commit_iclog, + uint flags) +{ + struct xlog_in_core *iclog = NULL; + struct xfs_log_iovec *vecp; + struct xfs_log_vec *lv; + int len; + int index; + int partial_copy = 0; + int partial_copy_len = 0; + int contwr = 0; + int record_cnt = 0; + int data_cnt = 0; + int error; + + *start_lsn = 0; + + len = xlog_write_calc_vec_length(ticket, log_vector); + if (log->l_cilp) { + /* + * Region headers and bytes are already accounted for. + * We only need to take into account start records and + * split regions in this function. + */ + if (ticket->t_flags & XLOG_TIC_INITED) + ticket->t_curr_res -= sizeof(xlog_op_header_t); - if (ticket->t_curr_res < len) { - xlog_print_tic_res(mp, ticket); -#ifdef DEBUG - xlog_panic( - "xfs_log_write: reservation ran out. Need to up reservation"); -#else - /* Customer configurable panic */ - xfs_cmn_err(XFS_PTAG_LOGRES, CE_ALERT, mp, - "xfs_log_write: reservation ran out. Need to up reservation"); - /* If we did not panic, shutdown the filesystem */ - xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); -#endif - } else - ticket->t_curr_res -= len; + /* + * Commit record headers need to be accounted for. These + * come in as separate writes so are easy to detect. + */ + if (flags & (XLOG_COMMIT_TRANS | XLOG_UNMOUNT_TRANS)) + ticket->t_curr_res -= sizeof(xlog_op_header_t); + } else + ticket->t_curr_res -= len; + + if (ticket->t_curr_res < 0) + xlog_print_tic_res(log->l_mp, ticket); + + index = 0; + lv = log_vector; + vecp = lv->lv_iovecp; + while (lv && index < lv->lv_niovecs) { + void *ptr; + int log_offset; + + error = xlog_state_get_iclog_space(log, len, &iclog, ticket, + &contwr, &log_offset); + if (error) + return error; - for (index = 0; index < nentries; ) { - if ((error = xlog_state_get_iclog_space(log, len, &iclog, ticket, - &contwr, &log_offset))) - return error; + ASSERT(log_offset <= iclog->ic_size - 1); + ptr = iclog->ic_datap + log_offset; - ASSERT(log_offset <= iclog->ic_size - 1); - ptr = (__psint_t) ((char *)iclog->ic_datap+log_offset); + /* start_lsn is the first lsn written to. That's all we need. */ + if (!*start_lsn) + *start_lsn = be64_to_cpu(iclog->ic_header.h_lsn); - /* start_lsn is the first lsn written to. That's all we need. */ - if (! *start_lsn) - *start_lsn = be64_to_cpu(iclog->ic_header.h_lsn); + /* + * This loop writes out as many regions as can fit in the amount + * of space which was allocated by xlog_state_get_iclog_space(). + */ + while (lv && index < lv->lv_niovecs) { + struct xfs_log_iovec *reg = &vecp[index]; + struct xlog_op_header *ophdr; + int start_rec_copy; + int copy_len; + int copy_off; + + ASSERT(reg->i_len % sizeof(__int32_t) == 0); + ASSERT((unsigned long)ptr % sizeof(__int32_t) == 0); + + start_rec_copy = xlog_write_start_rec(ptr, ticket); + if (start_rec_copy) { + record_cnt++; + xlog_write_adv_cnt(&ptr, &len, &log_offset, + start_rec_copy); + } - /* This loop writes out as many regions as can fit in the amount - * of space which was allocated by xlog_state_get_iclog_space(). - */ - while (index < nentries) { - ASSERT(reg[index].i_len % sizeof(__int32_t) == 0); - ASSERT((__psint_t)ptr % sizeof(__int32_t) == 0); - start_rec_copy = 0; - - /* If first write for transaction, insert start record. - * We can't be trying to commit if we are inited. We can't - * have any "partial_copy" if we are inited. - */ - if (ticket->t_flags & XLOG_TIC_INITED) { - logop_head = (xlog_op_header_t *)ptr; - logop_head->oh_tid = cpu_to_be32(ticket->t_tid); - logop_head->oh_clientid = ticket->t_clientid; - logop_head->oh_len = 0; - logop_head->oh_flags = XLOG_START_TRANS; - logop_head->oh_res2 = 0; - ticket->t_flags &= ~XLOG_TIC_INITED; /* clear bit */ - record_cnt++; - - start_rec_copy = sizeof(xlog_op_header_t); - xlog_write_adv_cnt(ptr, len, log_offset, start_rec_copy); - } + ophdr = xlog_write_setup_ophdr(log, ptr, ticket, flags); + if (!ophdr) + return XFS_ERROR(EIO); - /* Copy log operation header directly into data section */ - logop_head = (xlog_op_header_t *)ptr; - logop_head->oh_tid = cpu_to_be32(ticket->t_tid); - logop_head->oh_clientid = ticket->t_clientid; - logop_head->oh_res2 = 0; + xlog_write_adv_cnt(&ptr, &len, &log_offset, + sizeof(struct xlog_op_header)); + + len += xlog_write_setup_copy(ticket, ophdr, + iclog->ic_size-log_offset, + reg->i_len, + ©_off, ©_len, + &partial_copy, + &partial_copy_len); + xlog_verify_dest_ptr(log, ptr); + + /* copy region */ + ASSERT(copy_len >= 0); + memcpy(ptr, reg->i_addr + copy_off, copy_len); + xlog_write_adv_cnt(&ptr, &len, &log_offset, copy_len); + + copy_len += start_rec_copy + sizeof(xlog_op_header_t); + record_cnt++; + data_cnt += contwr ? copy_len : 0; + + error = xlog_write_copy_finish(log, iclog, flags, + &record_cnt, &data_cnt, + &partial_copy, + &partial_copy_len, + log_offset, + commit_iclog); + if (error) + return error; - /* header copied directly */ - xlog_write_adv_cnt(ptr, len, log_offset, sizeof(xlog_op_header_t)); + /* + * if we had a partial copy, we need to get more iclog + * space but we don't want to increment the region + * index because there is still more is this region to + * write. + * + * If we completed writing this region, and we flushed + * the iclog (indicated by resetting of the record + * count), then we also need to get more log space. If + * this was the last record, though, we are done and + * can just return. + */ + if (partial_copy) + break; - /* are we copying a commit or unmount record? */ - logop_head->oh_flags = flags; + if (++index == lv->lv_niovecs) { + lv = lv->lv_next; + index = 0; + if (lv) + vecp = lv->lv_iovecp; + } + if (record_cnt == 0) { + if (!lv) + return 0; + break; + } + } + } - /* - * We've seen logs corrupted with bad transaction client - * ids. This makes sure that XFS doesn't generate them on. - * Turn this into an EIO and shut down the filesystem. - */ - switch (logop_head->oh_clientid) { - case XFS_TRANSACTION: - case XFS_VOLUME: - case XFS_LOG: - break; - default: - xfs_fs_cmn_err(CE_WARN, mp, - "Bad XFS transaction clientid 0x%x in ticket 0x%p", - logop_head->oh_clientid, tic); - return XFS_ERROR(EIO); - } + ASSERT(len == 0); - /* Partial write last time? => (partial_copy != 0) - * need_copy is the amount we'd like to copy if everything could - * fit in the current memcpy. - */ - need_copy = reg[index].i_len - partial_copy_len; - - copy_off = partial_copy_len; - if (need_copy <= iclog->ic_size - log_offset) { /*complete write */ - copy_len = need_copy; - logop_head->oh_len = cpu_to_be32(copy_len); - if (partial_copy) - logop_head->oh_flags|= (XLOG_END_TRANS|XLOG_WAS_CONT_TRANS); - partial_copy_len = partial_copy = 0; - } else { /* partial write */ - copy_len = iclog->ic_size - log_offset; - logop_head->oh_len = cpu_to_be32(copy_len); - logop_head->oh_flags |= XLOG_CONTINUE_TRANS; - if (partial_copy) - logop_head->oh_flags |= XLOG_WAS_CONT_TRANS; - partial_copy_len += copy_len; - partial_copy++; - len += sizeof(xlog_op_header_t); /* from splitting of region */ - /* account for new log op header */ - ticket->t_curr_res -= sizeof(xlog_op_header_t); - ticket->t_res_num_ophdrs++; - } - xlog_verify_dest_ptr(log, ptr); - - /* copy region */ - ASSERT(copy_len >= 0); - memcpy((xfs_caddr_t)ptr, reg[index].i_addr + copy_off, copy_len); - xlog_write_adv_cnt(ptr, len, log_offset, copy_len); - - /* make copy_len total bytes copied, including headers */ - copy_len += start_rec_copy + sizeof(xlog_op_header_t); - record_cnt++; - data_cnt += contwr ? copy_len : 0; - if (partial_copy) { /* copied partial region */ - /* already marked WANT_SYNC by xlog_state_get_iclog_space */ - xlog_state_finish_copy(log, iclog, record_cnt, data_cnt); - record_cnt = data_cnt = 0; - if ((error = xlog_state_release_iclog(log, iclog))) - return error; - break; /* don't increment index */ - } else { /* copied entire region */ - index++; - partial_copy_len = partial_copy = 0; - - 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; - } else if ((error = xlog_state_release_iclog(log, iclog))) - return error; - if (index == nentries) - return 0; /* we are done */ - else - break; - } - } /* if (partial_copy) */ - } /* while (index < nentries) */ - } /* for (index = 0; index < nentries; ) */ - ASSERT(len == 0); + xlog_state_finish_copy(log, iclog, record_cnt, data_cnt); + if (!commit_iclog) + return xlog_state_release_iclog(log, iclog); - xlog_state_finish_copy(log, iclog, record_cnt, data_cnt); - if (commit_iclog) { ASSERT(flags & XLOG_COMMIT_TRANS); *commit_iclog = iclog; return 0; - } - return xlog_state_release_iclog(log, iclog); -} /* xlog_write */ +} /***************************************************************************** @@ -2854,7 +2986,6 @@ xlog_state_switch_iclogs(xlog_t *log, 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. * @@ -2882,11 +3013,19 @@ xlog_state_switch_iclogs(xlog_t *log, * 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); + + xlog_cil_push(log, 1); spin_lock(&log->l_icloglock); @@ -2932,7 +3071,9 @@ xlog_state_sync_all(xlog_t *log, uint flags, int *log_flushed) 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) @@ -2976,19 +3117,37 @@ maybe_sleep: */ 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. @@ -2996,109 +3155,148 @@ no_sleep: * 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; + ASSERT(lsn != 0); - if (iclog->ic_state & XLOG_STATE_IOERROR) { - spin_unlock(&log->l_icloglock); - return XFS_ERROR(EIO); - } + XFS_STATS_INC(xs_log_force); - do { - if (be64_to_cpu(iclog->ic_header.h_lsn) != lsn) { - iclog = iclog->ic_next; - continue; + if (log->l_cilp) { + lsn = xlog_cil_push_lsn(log, lsn); + if (lsn == NULLCOMMITLSN) + return 0; } - 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 @@ -3148,20 +3346,30 @@ xfs_log_ticket_get( return ticket; } +xlog_tid_t +xfs_log_get_trans_ident( + struct xfs_trans *tp) +{ + return tp->t_ticket->t_tid; +} + /* * Allocate and initialise a new log ticket. */ -STATIC xlog_ticket_t * -xlog_ticket_alloc(xlog_t *log, - int unit_bytes, - int cnt, - char client, - uint xflags) +xlog_ticket_t * +xlog_ticket_alloc( + struct log *log, + int unit_bytes, + int cnt, + char client, + uint xflags, + int alloc_flags) { - xlog_ticket_t *tic; + struct xlog_ticket *tic; uint num_headers; + int iclog_space; - tic = kmem_zone_zalloc(xfs_log_ticket_zone, KM_SLEEP|KM_MAYFAIL); + tic = kmem_zone_zalloc(xfs_log_ticket_zone, alloc_flags); if (!tic) return NULL; @@ -3203,16 +3411,40 @@ xlog_ticket_alloc(xlog_t *log, /* for start-rec */ unit_bytes += sizeof(xlog_op_header_t); - /* for LR headers */ - num_headers = ((unit_bytes + log->l_iclog_size-1) >> log->l_iclog_size_log); + /* + * for LR headers - the space for data in an iclog is the size minus + * the space used for the headers. If we use the iclog size, then we + * undercalculate the number of headers required. + * + * Furthermore - the addition of op headers for split-recs might + * increase the space required enough to require more log and op + * headers, so take that into account too. + * + * IMPORTANT: This reservation makes the assumption that if this + * transaction is the first in an iclog and hence has the LR headers + * accounted to it, then the remaining space in the iclog is + * exclusively for this transaction. i.e. if the transaction is larger + * than the iclog, it will be the only thing in that iclog. + * Fundamentally, this means we must pass the entire log vector to + * xlog_write to guarantee this. + */ + iclog_space = log->l_iclog_size - log->l_iclog_hsize; + num_headers = howmany(unit_bytes, iclog_space); + + /* for split-recs - ophdrs added when data split over LRs */ + unit_bytes += sizeof(xlog_op_header_t) * num_headers; + + /* add extra header reservations if we overrun */ + while (!num_headers || + howmany(unit_bytes, iclog_space) > num_headers) { + unit_bytes += sizeof(xlog_op_header_t); + num_headers++; + } unit_bytes += log->l_iclog_hsize * num_headers; /* for commit-rec LR header - note: padding will subsume the ophdr */ unit_bytes += log->l_iclog_hsize; - /* for split-recs - ophdrs added when data split over LRs */ - unit_bytes += sizeof(xlog_op_header_t) * num_headers; - /* for roundoff padding for transaction data and one for commit record */ if (xfs_sb_version_haslogv2(&log->l_mp->m_sb) && log->l_mp->m_sb.sb_logsunit > 1) { @@ -3228,13 +3460,13 @@ xlog_ticket_alloc(xlog_t *log, tic->t_curr_res = unit_bytes; tic->t_cnt = cnt; tic->t_ocnt = cnt; - tic->t_tid = (xlog_tid_t)((__psint_t)tic & 0xffffffff); + tic->t_tid = random32(); tic->t_clientid = client; tic->t_flags = XLOG_TIC_INITED; tic->t_trans_type = 0; if (xflags & XFS_LOG_PERM_RESERV) tic->t_flags |= XLOG_TIC_PERM_RESERV; - sv_init(&(tic->t_wait), SV_DEFAULT, "logtick"); + sv_init(&tic->t_wait, SV_DEFAULT, "logtick"); xlog_tic_reset_res(tic); @@ -3255,20 +3487,22 @@ xlog_ticket_alloc(xlog_t *log, * part of the log in case we trash the log structure. */ void -xlog_verify_dest_ptr(xlog_t *log, - __psint_t ptr) +xlog_verify_dest_ptr( + struct log *log, + char *ptr) { int i; int good_ptr = 0; - for (i=0; i < log->l_iclog_bufs; i++) { - if (ptr >= (__psint_t)log->l_iclog_bak[i] && - ptr <= (__psint_t)log->l_iclog_bak[i]+log->l_iclog_size) + for (i = 0; i < log->l_iclog_bufs; i++) { + if (ptr >= log->l_iclog_bak[i] && + ptr <= log->l_iclog_bak[i] + log->l_iclog_size) good_ptr++; } - if (! good_ptr) + + if (!good_ptr) xlog_panic("xlog_verify_dest_ptr: invalid ptr"); -} /* xlog_verify_dest_ptr */ +} STATIC void xlog_verify_grant_head(xlog_t *log, int equals) @@ -3454,6 +3688,11 @@ xlog_state_ioerror( * c. nothing new gets queued up after (a) and (b) are done. * d. if !logerror, flush the iclogs to disk, then seal them off * for business. + * + * Note: for delayed logging the !logerror case needs to flush the regions + * held in memory out to the iclogs before flushing them to disk. This needs + * to be done before the log is marked as shutdown, otherwise the flush to the + * iclogs will fail. */ int xfs_log_force_umount( @@ -3463,7 +3702,6 @@ xfs_log_force_umount( xlog_ticket_t *tic; xlog_t *log; int retval; - int dummy; log = mp->m_log; @@ -3488,6 +3726,16 @@ xfs_log_force_umount( return 1; } retval = 0; + + /* + * Flush the in memory commit item list before marking the log as + * being shut down. We need to do it in this order to ensure all the + * completed transactions are flushed to disk with the xfs_log_force() + * call below. + */ + if (!logerror && (mp->m_flags & XFS_MOUNT_DELAYLOG)) + xlog_cil_push(log, 1); + /* * We must hold both the GRANT lock and the LOG lock, * before we mark the filesystem SHUTDOWN and wake @@ -3537,13 +3785,14 @@ xfs_log_force_umount( } 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); |