From f41febd2eb5bdaa1c5685fe8a9b09276645013bc Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Wed, 29 Jul 2015 11:52:04 +1000 Subject: xfs: Use consistent logging message prefixes The second and subsequent lines of multi-line logging messages are not prefixed with the same information as the first line. Separate messages with newlines into multiple calls to ensure consistent prefixing and allow easier grep use. Signed-off-by: Joe Perches Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 50 +++++++++++++++++++++++++------------------------- 1 file changed, 25 insertions(+), 25 deletions(-) (limited to 'fs/xfs/xfs_log.c') diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 08d4fe46f0fa..6b5a84a05340 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -668,9 +668,9 @@ xfs_log_mount( ASSERT(0); goto out_free_log; } + xfs_crit(mp, "Log size out of supported range."); xfs_crit(mp, -"Log size out of supported range. Continuing onwards, but if log hangs are\n" -"experienced then please report this message in the bug report."); +"Continuing onwards, but if log hangs are experienced then please report this message in the bug report."); } /* @@ -1142,11 +1142,13 @@ xlog_space_left( * In this case we just want to return the size of the * log as the amount of space left. */ + xfs_alert(log->l_mp, "xlog_space_left: head behind tail"); xfs_alert(log->l_mp, - "xlog_space_left: head behind tail\n" - " tail_cycle = %d, tail_bytes = %d\n" - " GH cycle = %d, GH bytes = %d", - tail_cycle, tail_bytes, head_cycle, head_bytes); + " tail_cycle = %d, tail_bytes = %d", + tail_cycle, tail_bytes); + xfs_alert(log->l_mp, + " GH cycle = %d, GH bytes = %d", + head_cycle, head_bytes); ASSERT(0); free_bytes = log->l_logsize; } @@ -2028,26 +2030,24 @@ xlog_print_tic_res( "SWAPEXT" }; - xfs_warn(mp, - "xlog_write: reservation summary:\n" - " trans type = %s (%u)\n" - " unit res = %d bytes\n" - " current res = %d bytes\n" - " total reg = %u bytes (o/flow = %u bytes)\n" - " ophdrs = %u (ophdr space = %u bytes)\n" - " ophdr + reg = %u bytes\n" - " num regions = %u", - ((ticket->t_trans_type <= 0 || - ticket->t_trans_type > XFS_TRANS_TYPE_MAX) ? + xfs_warn(mp, "xlog_write: reservation summary:"); + xfs_warn(mp, " trans type = %s (%u)", + ((ticket->t_trans_type <= 0 || + ticket->t_trans_type > XFS_TRANS_TYPE_MAX) ? "bad-trans-type" : trans_type_str[ticket->t_trans_type-1]), - ticket->t_trans_type, - ticket->t_unit_res, - ticket->t_curr_res, - ticket->t_res_arr_sum, ticket->t_res_o_flow, - ticket->t_res_num_ophdrs, ophdr_spc, - ticket->t_res_arr_sum + - ticket->t_res_o_flow + ophdr_spc, - ticket->t_res_num); + ticket->t_trans_type); + xfs_warn(mp, " unit res = %d bytes", + ticket->t_unit_res); + xfs_warn(mp, " current res = %d bytes", + ticket->t_curr_res); + xfs_warn(mp, " total reg = %u bytes (o/flow = %u bytes)", + ticket->t_res_arr_sum, ticket->t_res_o_flow); + xfs_warn(mp, " ophdrs = %u (ophdr space = %u bytes)", + ticket->t_res_num_ophdrs, ophdr_spc); + xfs_warn(mp, " ophdr + reg = %u bytes", + ticket->t_res_arr_sum + ticket->t_res_o_flow + ophdr_spc); + xfs_warn(mp, " num regions = %u", + ticket->t_res_num); for (i = 0; i < ticket->t_res_num; i++) { uint r_type = ticket->t_res_arr[i].r_type; -- cgit From f0b2efad16e78623b5a156f6e4e9166907b83155 Mon Sep 17 00:00:00 2001 From: Brian Foster Date: Wed, 19 Aug 2015 09:58:36 +1000 Subject: xfs: don't leave EFIs on AIL on mount failure Log recovery occurs in two phases at mount time. In the first phase, EFIs and EFDs are processed and potentially cancelled out. EFIs without EFD objects are inserted into the AIL for processing and recovery in the second phase. xfs_mountfs() runs various other operations between the phases and is thus subject to failure. If failure occurs after the first phase but before the second, pending EFIs sit on the AIL, pin it and cause the mount to hang. Update the mount sequence to ensure that pending EFIs are cancelled in the event of failure. Add a recovery cancellation mechanism to iterate the AIL and cancel all EFI items when requested. Plumb cancellation support through the log mount finish helper and update xfs_mountfs() to invoke cancellation in the event of failure after recovery has started. Signed-off-by: Brian Foster Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 30 ++++++++++++++++++++++++------ 1 file changed, 24 insertions(+), 6 deletions(-) (limited to 'fs/xfs/xfs_log.c') diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 08d4fe46f0fa..7ce278d66577 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -700,6 +700,7 @@ xfs_log_mount( if (error) { xfs_warn(mp, "log mount/recovery failed: error %d", error); + xlog_recover_cancel(mp->m_log); goto out_destroy_ail; } } @@ -740,18 +741,35 @@ out: * it. */ int -xfs_log_mount_finish(xfs_mount_t *mp) +xfs_log_mount_finish( + struct xfs_mount *mp) { int error = 0; - if (!(mp->m_flags & XFS_MOUNT_NORECOVERY)) { - error = xlog_recover_finish(mp->m_log); - if (!error) - xfs_log_work_queue(mp); - } else { + if (mp->m_flags & XFS_MOUNT_NORECOVERY) { ASSERT(mp->m_flags & XFS_MOUNT_RDONLY); + return 0; } + error = xlog_recover_finish(mp->m_log); + if (!error) + xfs_log_work_queue(mp); + + return error; +} + +/* + * The mount has failed. Cancel the recovery if it hasn't completed and destroy + * the log. + */ +int +xfs_log_mount_cancel( + struct xfs_mount *mp) +{ + int error; + + error = xlog_recover_cancel(mp->m_log); + xfs_log_unmount(mp); return error; } -- cgit From a3f20014659a1566a4e516e2bf95287960fe2c44 Mon Sep 17 00:00:00 2001 From: Brian Foster Date: Wed, 19 Aug 2015 09:59:50 +1000 Subject: xfs: checksum log record ext headers based on record size The first 4 bytes of every basic block in the physical log is stamped with the current lsn. To support this mechanism, the log record header (first block of each new log record) contains space for the original first byte of each log record block before it is replaced with the lsn. The log record header has space for 32k worth of blocks. The version 2 log adds new extended record headers for each additional 32k worth of blocks beyond what is supported by the record header. The log record checksum incorporates the log record header, the extended headers and the record payload. xlog_cksum() checksums the extended headers based on log->l_iclog_heads, which specifies the number of extended headers in a log record based on the log buffer size mount option. The log buffer size is variable, however, and thus means the checksum can be calculated differently based on how a filesystem is mounted. This is problematic if a filesystem crashes and recovery occurs on a subsequent mount using a different log buffer size. For example, crash an active filesystem that is mounted with the default (32k) logbsize, attempt remount/recovery using '-o logbsize=64k' and the mount fails on or warns about log checksum failures. To avoid this problem, update xlog_cksum() to calculate the checksum based on the size of the log buffer according to the log record. The size is already included in the h_size field of the log record header and thus is available at log recovery time. Extended log record headers are also only written when the log record is large enough to require them. This makes checksum calculation of log records consistent with the extended record header mechanism as well as how on-disk records are checksummed with various log buffer size mount options. Signed-off-by: Brian Foster Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'fs/xfs/xfs_log.c') diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 7ce278d66577..a98daa68045d 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -1670,8 +1670,13 @@ xlog_cksum( if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { union xlog_in_core2 *xhdr = (union xlog_in_core2 *)rhead; int i; + int xheads; - for (i = 1; i < log->l_iclog_heads; i++) { + xheads = size / XLOG_HEADER_CYCLE_SIZE; + if (size % XLOG_HEADER_CYCLE_SIZE) + xheads++; + + for (i = 1; i < xheads; i++) { crc = crc32c(crc, &xhdr[i].hic_xheader, sizeof(struct xlog_rec_ext_header)); } -- cgit