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authorBob Peterson <rpeterso@redhat.com>2019-11-15 17:42:46 +0300
committerAndreas Gruenbacher <agruenba@redhat.com>2019-11-15 19:57:30 +0300
commit52b1cdcb7a84a4a3cec0093eaf390bf2e11e4278 (patch)
treea683c3b2fe2844f04f41a14046e0b9152f2d5439 /fs/gfs2
parent60528afa78667baf5ffe8e57ccbe77cd024534c5 (diff)
downloadlinux-52b1cdcb7a84a4a3cec0093eaf390bf2e11e4278.tar.xz
gfs2: Abort gfs2_freeze if io error is seen
Before this patch, an io error, such as -EIO writing to the journal would cause function gfs2_freeze to go into an infinite loop, continuously retrying the freeze operation. But nothing ever clears the -EIO except unmount after withdraw, which is impossible if the freeze operation never ends (fails). Instead you get: [ 6499.767994] gfs2: fsid=dm-32.0: error freezing FS: -5 [ 6499.773058] gfs2: fsid=dm-32.0: retrying... [ 6500.791957] gfs2: fsid=dm-32.0: error freezing FS: -5 [ 6500.797015] gfs2: fsid=dm-32.0: retrying... This patch adds a check for -EIO in gfs2_freeze, and if seen, it dequeues the freeze glock, aborts the loop and returns the error. Also, there's no need to pass the freeze holder to function gfs2_lock_fs_check_clean since it's only called in one place and it's a well-known superblock pointer, so this simplifies that. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/super.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 8154c38e488b..68cc7c291a81 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -399,8 +399,7 @@ struct lfcc {
* Returns: errno
*/
-static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
- struct gfs2_holder *freeze_gh)
+static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp)
{
struct gfs2_inode *ip;
struct gfs2_jdesc *jd;
@@ -425,7 +424,9 @@ static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
}
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE,
- GL_NOCACHE, freeze_gh);
+ GL_NOCACHE, &sdp->sd_freeze_gh);
+ if (error)
+ goto out;
list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
error = gfs2_jdesc_check(jd);
@@ -441,7 +442,7 @@ static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
}
if (error)
- gfs2_glock_dq_uninit(freeze_gh);
+ gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
out:
while (!list_empty(&list)) {
@@ -767,15 +768,19 @@ static int gfs2_freeze(struct super_block *sb)
goto out;
}
- error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh);
+ error = gfs2_lock_fs_check_clean(sdp);
if (!error)
break;
if (error == -EBUSY)
fs_err(sdp, "waiting for recovery before freeze\n");
- else
+ else if (error == -EIO) {
+ fs_err(sdp, "Fatal IO error: cannot freeze gfs2 due "
+ "to recovery error.\n");
+ goto out;
+ } else {
fs_err(sdp, "error freezing FS: %d\n", error);
-
+ }
fs_err(sdp, "retrying...\n");
msleep(1000);
}