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authorBob Peterson <rpeterso@redhat.com>2021-07-30 20:41:16 +0300
committerBob Peterson <rpeterso@redhat.com>2021-08-20 17:03:46 +0300
commit8cc67f704f4b61384343629feb1f1c30d64188c6 (patch)
tree74eb26f2977c055e89178426c35a2dc63b40bde7 /fs/gfs2
parent1b8550b5de7610027609ef605f85dc29f1d9da82 (diff)
downloadlinux-8cc67f704f4b61384343629feb1f1c30d64188c6.tar.xz
gfs2: don't stop reads while withdraw in progress
When gfs2 withdraws a file system, it calls signal_our_withdraw which triggers another node to replay the withdrawing node's journal. Then it waits until it knows the journal has been replayed. Part of this wait is to repeatedly call check_journal_clean which calls gfs2_jdesc_check, which checks to see if the journal is sane. As part of its sanity checks it needs to re-read its journal's metadata. But with today's code, any attempt to re-read the metadata results in -EIO because of a check for the file system withdraw in function gfs2_meta_wait. This patch adds an additional check for SDF_WITHDRAW_IN_PROG, to tell if the read is done while the withdraw is in progress. In that case we allow the metadata read to not be rejected. Therefore the metadata check is done properly, so the withdraw sequence can finish normally. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/meta_io.c7
-rw-r--r--fs/gfs2/util.h5
2 files changed, 8 insertions, 4 deletions
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 7c9619997355..72d30a682ece 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -258,8 +258,7 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
struct buffer_head *bh, *bhs[2];
int num = 0;
- if (unlikely(gfs2_withdrawn(sdp)) &&
- (!sdp->sd_jdesc || gl != sdp->sd_jinode_gl)) {
+ if (unlikely(gfs2_withdrawn(sdp)) && !gfs2_withdraw_in_prog(sdp)) {
*bhp = NULL;
return -EIO;
}
@@ -317,7 +316,7 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh)
{
- if (unlikely(gfs2_withdrawn(sdp)))
+ if (unlikely(gfs2_withdrawn(sdp)) && !gfs2_withdraw_in_prog(sdp))
return -EIO;
wait_on_buffer(bh);
@@ -328,7 +327,7 @@ int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh)
gfs2_io_error_bh_wd(sdp, bh);
return -EIO;
}
- if (unlikely(gfs2_withdrawn(sdp)))
+ if (unlikely(gfs2_withdrawn(sdp)) && !gfs2_withdraw_in_prog(sdp))
return -EIO;
return 0;
diff --git a/fs/gfs2/util.h b/fs/gfs2/util.h
index 69e1a0ae5a4d..78ec190f4155 100644
--- a/fs/gfs2/util.h
+++ b/fs/gfs2/util.h
@@ -218,6 +218,11 @@ static inline bool gfs2_withdrawing(struct gfs2_sbd *sdp)
!test_bit(SDF_WITHDRAWN, &sdp->sd_flags);
}
+static inline bool gfs2_withdraw_in_prog(struct gfs2_sbd *sdp)
+{
+ return test_bit(SDF_WITHDRAW_IN_PROG, &sdp->sd_flags);
+}
+
#define gfs2_tune_get(sdp, field) \
gfs2_tune_get_i(&(sdp)->sd_tune, &(sdp)->sd_tune.field)