From 12e164aa1f9d82e8dc3b09ff211cfae8d6a8bfb3 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 1 Sep 2020 10:55:20 -0700 Subject: [PATCH] xfs: refactor the buf ioend disposition code Handle the no-error case in xfs_buf_iodone_error as well, and to clarify the code rename the function, use the actual enum type as return value and then switch on it in the callers. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_buf_item.c | 115 +++++++++++++++++++++++++++----------------------- 1 file changed, 62 insertions(+), 53 deletions(-) diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index 408d1b5..a9f6699 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -1045,24 +1045,27 @@ xfs_buf_ioerror_permanent( * * Multi-state return value: * - * XBF_IOERROR_FINISH: clear IO error retry state and run callback completions - * XBF_IOERROR_DONE: resubmitted immediately, do not run any completions - * XBF_IOERROR_FAIL: transient error, run failure callback completions and then + * XBF_IOEND_FINISH: run callback completions + * XBF_IOEND_DONE: resubmitted immediately, do not run any completions + * XBF_IOEND_FAIL: transient error, run failure callback completions and then * release the buffer */ -enum { - XBF_IOERROR_FINISH, - XBF_IOERROR_DONE, - XBF_IOERROR_FAIL, +enum xfs_buf_ioend_disposition { + XBF_IOEND_FINISH, + XBF_IOEND_DONE, + XBF_IOEND_FAIL, }; -static int -xfs_buf_iodone_error( +static enum xfs_buf_ioend_disposition +xfs_buf_ioend_disposition( struct xfs_buf *bp) { struct xfs_mount *mp = bp->b_mount; struct xfs_error_cfg *cfg; + if (likely(!bp->b_error)) + return XBF_IOEND_FINISH; + if (xfs_buf_ioerror_fail_without_retry(bp)) goto out_stale; @@ -1072,7 +1075,7 @@ xfs_buf_iodone_error( if (xfs_buf_ioerror_retry(bp, cfg)) { xfs_buf_ioerror(bp, 0); xfs_buf_submit(bp); - return XBF_IOERROR_DONE; + return XBF_IOEND_DONE; } /* @@ -1085,13 +1088,13 @@ xfs_buf_iodone_error( } /* Still considered a transient error. Caller will schedule retries. */ - return XBF_IOERROR_FAIL; + return XBF_IOEND_FAIL; out_stale: xfs_buf_stale(bp); bp->b_flags |= XBF_DONE; trace_xfs_buf_error_relse(bp, _RET_IP_); - return XBF_IOERROR_FINISH; + return XBF_IOEND_FINISH; } static void @@ -1127,6 +1130,19 @@ xfs_buf_clear_ioerror_retry_state( bp->b_first_retry_time = 0; } +static void +xfs_buf_inode_io_fail( + struct xfs_buf *bp) +{ + struct xfs_log_item *lip; + + list_for_each_entry(lip, &bp->b_li_list, li_bio_list) + set_bit(XFS_LI_FAILED, &lip->li_flags); + + xfs_buf_ioerror(bp, 0); + xfs_buf_relse(bp); +} + /* * Inode buffer iodone callback function. */ @@ -1134,30 +1150,36 @@ void xfs_buf_inode_iodone( struct xfs_buf *bp) { - if (bp->b_error) { - struct xfs_log_item *lip; - int ret = xfs_buf_iodone_error(bp); - - if (ret == XBF_IOERROR_FINISH) - goto finish_iodone; - if (ret == XBF_IOERROR_DONE) - return; - ASSERT(ret == XBF_IOERROR_FAIL); - list_for_each_entry(lip, &bp->b_li_list, li_bio_list) { - set_bit(XFS_LI_FAILED, &lip->li_flags); - } - xfs_buf_ioerror(bp, 0); - xfs_buf_relse(bp); + switch (xfs_buf_ioend_disposition(bp)) { + case XBF_IOEND_DONE: + return; + case XBF_IOEND_FAIL: + xfs_buf_inode_io_fail(bp); return; + default: + break; } -finish_iodone: xfs_buf_clear_ioerror_retry_state(bp); xfs_buf_item_done(bp); xfs_iflush_done(bp); xfs_buf_ioend_finish(bp); } +static void +xfs_buf_dquot_io_fail( + struct xfs_buf *bp) +{ + struct xfs_log_item *lip; + + spin_lock(&bp->b_mount->m_ail->ail_lock); + list_for_each_entry(lip, &bp->b_li_list, li_bio_list) + xfs_set_li_failed(lip, bp); + spin_unlock(&bp->b_mount->m_ail->ail_lock); + xfs_buf_ioerror(bp, 0); + xfs_buf_relse(bp); +} + /* * Dquot buffer iodone callback function. */ @@ -1165,26 +1187,16 @@ void xfs_buf_dquot_iodone( struct xfs_buf *bp) { - if (bp->b_error) { - struct xfs_log_item *lip; - int ret = xfs_buf_iodone_error(bp); - - if (ret == XBF_IOERROR_FINISH) - goto finish_iodone; - if (ret == XBF_IOERROR_DONE) - return; - ASSERT(ret == XBF_IOERROR_FAIL); - spin_lock(&bp->b_mount->m_ail->ail_lock); - list_for_each_entry(lip, &bp->b_li_list, li_bio_list) { - xfs_set_li_failed(lip, bp); - } - spin_unlock(&bp->b_mount->m_ail->ail_lock); - xfs_buf_ioerror(bp, 0); - xfs_buf_relse(bp); + switch (xfs_buf_ioend_disposition(bp)) { + case XBF_IOEND_DONE: + return; + case XBF_IOEND_FAIL: + xfs_buf_dquot_io_fail(bp); return; + default: + break; } -finish_iodone: xfs_buf_clear_ioerror_retry_state(bp); /* a newly allocated dquot buffer might have a log item attached */ xfs_buf_item_done(bp); @@ -1202,21 +1214,18 @@ void xfs_buf_iodone( struct xfs_buf *bp) { - if (bp->b_error) { - int ret = xfs_buf_iodone_error(bp); - - if (ret == XBF_IOERROR_FINISH) - goto finish_iodone; - if (ret == XBF_IOERROR_DONE) - return; - ASSERT(ret == XBF_IOERROR_FAIL); + switch (xfs_buf_ioend_disposition(bp)) { + case XBF_IOEND_DONE: + return; + case XBF_IOEND_FAIL: ASSERT(list_empty(&bp->b_li_list)); xfs_buf_ioerror(bp, 0); xfs_buf_relse(bp); return; + default: + break; } -finish_iodone: xfs_buf_clear_ioerror_retry_state(bp); xfs_buf_item_done(bp); xfs_buf_ioend_finish(bp); -- 2.7.4