diff options
Diffstat (limited to 'fs/xfs/xfs_log_recover.c')
| -rw-r--r-- | fs/xfs/xfs_log_recover.c | 82 |
1 files changed, 64 insertions, 18 deletions
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index e8638fd2c0c3..e24fb7b6f3fb 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -3846,14 +3846,13 @@ STATIC int xlog_recover_commit_trans( struct xlog *log, struct xlog_recover *trans, - int pass) + int pass, + struct list_head *buffer_list) { int error = 0; - int error2; int items_queued = 0; struct xlog_recover_item *item; struct xlog_recover_item *next; - LIST_HEAD (buffer_list); LIST_HEAD (ra_list); LIST_HEAD (done_list); @@ -3876,7 +3875,7 @@ xlog_recover_commit_trans( items_queued++; if (items_queued >= XLOG_RECOVER_COMMIT_QUEUE_MAX) { error = xlog_recover_items_pass2(log, trans, - &buffer_list, &ra_list); + buffer_list, &ra_list); list_splice_tail_init(&ra_list, &done_list); items_queued = 0; } @@ -3894,15 +3893,14 @@ out: if (!list_empty(&ra_list)) { if (!error) error = xlog_recover_items_pass2(log, trans, - &buffer_list, &ra_list); + buffer_list, &ra_list); list_splice_tail_init(&ra_list, &done_list); } if (!list_empty(&done_list)) list_splice_init(&done_list, &trans->r_itemq); - error2 = xfs_buf_delwri_submit(&buffer_list); - return error ? error : error2; + return error; } STATIC void @@ -4085,7 +4083,8 @@ xlog_recovery_process_trans( char *dp, unsigned int len, unsigned int flags, - int pass) + int pass, + struct list_head *buffer_list) { int error = 0; bool freeit = false; @@ -4109,7 +4108,8 @@ xlog_recovery_process_trans( error = xlog_recover_add_to_cont_trans(log, trans, dp, len); break; case XLOG_COMMIT_TRANS: - error = xlog_recover_commit_trans(log, trans, pass); + error = xlog_recover_commit_trans(log, trans, pass, + buffer_list); /* success or fail, we are now done with this transaction. */ freeit = true; break; @@ -4191,10 +4191,12 @@ xlog_recover_process_ophdr( struct xlog_op_header *ohead, char *dp, char *end, - int pass) + int pass, + struct list_head *buffer_list) { struct xlog_recover *trans; unsigned int len; + int error; /* Do we understand who wrote this op? */ if (ohead->oh_clientid != XFS_TRANSACTION && @@ -4221,8 +4223,39 @@ xlog_recover_process_ophdr( return 0; } + /* + * The recovered buffer queue is drained only once we know that all + * recovery items for the current LSN have been processed. This is + * required because: + * + * - Buffer write submission updates the metadata LSN of the buffer. + * - Log recovery skips items with a metadata LSN >= the current LSN of + * the recovery item. + * - Separate recovery items against the same metadata buffer can share + * a current LSN. I.e., consider that the LSN of a recovery item is + * defined as the starting LSN of the first record in which its + * transaction appears, that a record can hold multiple transactions, + * and/or that a transaction can span multiple records. + * + * In other words, we are allowed to submit a buffer from log recovery + * once per current LSN. Otherwise, we may incorrectly skip recovery + * items and cause corruption. + * + * We don't know up front whether buffers are updated multiple times per + * LSN. Therefore, track the current LSN of each commit log record as it + * is processed and drain the queue when it changes. Use commit records + * because they are ordered correctly by the logging code. + */ + if (log->l_recovery_lsn != trans->r_lsn && + ohead->oh_flags & XLOG_COMMIT_TRANS) { + error = xfs_buf_delwri_submit(buffer_list); + if (error) + return error; + log->l_recovery_lsn = trans->r_lsn; + } + return xlog_recovery_process_trans(log, trans, dp, len, - ohead->oh_flags, pass); + ohead->oh_flags, pass, buffer_list); } /* @@ -4240,7 +4273,8 @@ xlog_recover_process_data( struct hlist_head rhash[], struct xlog_rec_header *rhead, char *dp, - int pass) + int pass, + struct list_head *buffer_list) { struct xlog_op_header *ohead; char *end; @@ -4262,7 +4296,7 @@ xlog_recover_process_data( /* errors will abort recovery */ error = xlog_recover_process_ophdr(log, rhash, rhead, ohead, - dp, end, pass); + dp, end, pass, buffer_list); if (error) return error; @@ -4685,7 +4719,8 @@ xlog_recover_process( struct hlist_head rhash[], struct xlog_rec_header *rhead, char *dp, - int pass) + int pass, + struct list_head *buffer_list) { int error; __le32 crc; @@ -4732,7 +4767,8 @@ xlog_recover_process( if (error) return error; - return xlog_recover_process_data(log, rhash, rhead, dp, pass); + return xlog_recover_process_data(log, rhash, rhead, dp, pass, + buffer_list); } STATIC int @@ -4793,9 +4829,11 @@ xlog_do_recovery_pass( char *offset; xfs_buf_t *hbp, *dbp; int error = 0, h_size, h_len; + int error2 = 0; int bblks, split_bblks; int hblks, split_hblks, wrapped_hblks; struct hlist_head rhash[XLOG_RHASH_SIZE]; + LIST_HEAD (buffer_list); ASSERT(head_blk != tail_blk); rhead_blk = 0; @@ -4981,7 +5019,7 @@ xlog_do_recovery_pass( } error = xlog_recover_process(log, rhash, rhead, offset, - pass); + pass, &buffer_list); if (error) goto bread_err2; @@ -5012,7 +5050,8 @@ xlog_do_recovery_pass( if (error) goto bread_err2; - error = xlog_recover_process(log, rhash, rhead, offset, pass); + error = xlog_recover_process(log, rhash, rhead, offset, pass, + &buffer_list); if (error) goto bread_err2; @@ -5025,10 +5064,17 @@ xlog_do_recovery_pass( bread_err1: xlog_put_bp(hbp); + /* + * Submit buffers that have been added from the last record processed, + * regardless of error status. + */ + if (!list_empty(&buffer_list)) + error2 = xfs_buf_delwri_submit(&buffer_list); + if (error && first_bad) *first_bad = rhead_blk; - return error; + return error ? error : error2; } /* |