From 317a6676a279bf71c881992387f75e16e009259c Mon Sep 17 00:00:00 2001 From: Eric Blake Date: Fri, 7 Jul 2017 07:44:45 -0500 Subject: [PATCH] commit: Switch commit_run() to byte-based We are gradually converting to byte-based interfaces, as they are easier to reason about than sector-based. Change the internal loop iteration of committing to track by bytes instead of sectors (although we are still guaranteed that we iterate by steps that are sector-aligned). Signed-off-by: Eric Blake Reviewed-by: John Snow Reviewed-by: Jeff Cody Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf --- block/commit.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/block/commit.c b/block/commit.c index 6f67d78ed9..c3a7bca20c 100644 --- a/block/commit.c +++ b/block/commit.c @@ -143,17 +143,16 @@ static void coroutine_fn commit_run(void *opaque) { CommitBlockJob *s = opaque; CommitCompleteData *data; - int64_t sector_num, end; + int64_t offset; uint64_t delay_ns = 0; int ret = 0; - int n = 0; + int n = 0; /* sectors */ void *buf = NULL; int bytes_written = 0; int64_t base_len; ret = s->common.len = blk_getlength(s->top); - if (s->common.len < 0) { goto out; } @@ -170,10 +169,9 @@ static void coroutine_fn commit_run(void *opaque) } } - end = s->common.len >> BDRV_SECTOR_BITS; buf = blk_blockalign(s->top, COMMIT_BUFFER_SIZE); - for (sector_num = 0; sector_num < end; sector_num += n) { + for (offset = 0; offset < s->common.len; offset += n * BDRV_SECTOR_SIZE) { bool copy; /* Note that even when no rate limit is applied we need to yield @@ -185,15 +183,13 @@ static void coroutine_fn commit_run(void *opaque) } /* Copy if allocated above the base */ ret = bdrv_is_allocated_above(blk_bs(s->top), blk_bs(s->base), - sector_num, + offset / BDRV_SECTOR_SIZE, COMMIT_BUFFER_SIZE / BDRV_SECTOR_SIZE, &n); copy = (ret == 1); - trace_commit_one_iteration(s, sector_num * BDRV_SECTOR_SIZE, - n * BDRV_SECTOR_SIZE, ret); + trace_commit_one_iteration(s, offset, n * BDRV_SECTOR_SIZE, ret); if (copy) { - ret = commit_populate(s->top, s->base, - sector_num * BDRV_SECTOR_SIZE, + ret = commit_populate(s->top, s->base, offset, n * BDRV_SECTOR_SIZE, buf); bytes_written += n * BDRV_SECTOR_SIZE; }