diff options
| author | Andreas Gruenbacher <agruenba@redhat.com> | 2019-08-28 22:21:34 +0200 |
|---|---|---|
| committer | Andreas Gruenbacher <agruenba@redhat.com> | 2019-11-12 15:17:53 +0100 |
| commit | 19ebc050e48c3ae05b9c854001c0893127d118d6 (patch) | |
| tree | 06c856d0850cafa59491bb4c1e3384b72b52a5ab /fs/gfs2/lops.c | |
| parent | 184b4e60853dfeef36b96948ab8fedb7e271063c (diff) | |
gfs2: Remove active journal side effect from gfs2_write_log_header
Function gfs2_write_log_header can be used to write a log header into any of
the journals of a filesystem. When used on the node's own journal,
gfs2_write_log_header advances the current position in the log
(sdp->sd_log_flush_head) as a side effect, through function gfs2_log_bmap.
This is confusing, and it also means that we can't use gfs2_log_bmap for other
journals even if they have an extent map. So clean this mess up by not
advancing sdp->sd_log_flush_head in gfs2_write_log_header or gfs2_log_bmap
anymore and making that a responsibility of the callers instead.
This is related to commit 7c70b896951c ("gfs2: clean_journal improperly set
sd_log_flush_head").
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2/lops.c')
| -rw-r--r-- | fs/gfs2/lops.c | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index 5b17979af539..313b83ef6657 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -129,7 +129,7 @@ static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, atomic_dec(&sdp->sd_log_pinned); } -static void gfs2_log_incr_head(struct gfs2_sbd *sdp) +void gfs2_log_incr_head(struct gfs2_sbd *sdp) { BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) && (sdp->sd_log_flush_head != sdp->sd_log_head)); @@ -138,18 +138,13 @@ static void gfs2_log_incr_head(struct gfs2_sbd *sdp) sdp->sd_log_flush_head = 0; } -u64 gfs2_log_bmap(struct gfs2_sbd *sdp) +u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lblock) { - unsigned int lbn = sdp->sd_log_flush_head; struct gfs2_journal_extent *je; - u64 block; - list_for_each_entry(je, &sdp->sd_jdesc->extent_list, list) { - if ((lbn >= je->lblock) && (lbn < (je->lblock + je->blocks))) { - block = je->dblock + lbn - je->lblock; - gfs2_log_incr_head(sdp); - return block; - } + list_for_each_entry(je, &jd->extent_list, list) { + if (lblock >= je->lblock && lblock < je->lblock + je->blocks) + return je->dblock + lblock - je->lblock; } return -1; @@ -351,8 +346,11 @@ void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page, static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh) { - gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh), - gfs2_log_bmap(sdp)); + u64 dblock; + + dblock = gfs2_log_bmap(sdp->sd_jdesc, sdp->sd_log_flush_head); + gfs2_log_incr_head(sdp); + gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh), dblock); } /** @@ -369,8 +367,11 @@ static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh) void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page) { struct super_block *sb = sdp->sd_vfs; - gfs2_log_write(sdp, page, sb->s_blocksize, 0, - gfs2_log_bmap(sdp)); + u64 dblock; + + dblock = gfs2_log_bmap(sdp->sd_jdesc, sdp->sd_log_flush_head); + gfs2_log_incr_head(sdp); + gfs2_log_write(sdp, page, sb->s_blocksize, 0, dblock); } /** |