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authorAndreas Gruenbacher <agruenba@redhat.com>2023-08-25 12:18:38 +0300
committerAndreas Gruenbacher <agruenba@redhat.com>2023-09-05 16:58:17 +0300
commitfe0690f0a6f190a9ec0736c01ddeba7a729cf30d (patch)
treebe579cb6b52703667dda859700f46ff23a97d794 /fs/gfs2
parente4a8b5481c59a3f1252f595330c2d2cd038886b2 (diff)
downloadlinux-fe0690f0a6f190a9ec0736c01ddeba7a729cf30d.tar.xz
gfs2: Sanitize kthread stopping
Immediately stop the logd and quotad kernel threads when a filesystem withdraw is detected: those threads aren't doing anything useful after a withdraw. (Depends on the extra logd and quotad task struct references held since commit 7a109f383fa3 ("gfs2: Fix asynchronous thread destruction").) In addition, check for kthread_should_stop() in the wait condition in gfs2_quotad() to stop immediately when kthread_stop() is called. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/log.c9
-rw-r--r--fs/gfs2/quota.c9
2 files changed, 9 insertions, 9 deletions
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index addf4ce0bedd..e5271ae87d1c 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -1298,11 +1298,9 @@ int gfs2_logd(void *data)
unsigned long t = 1;
while (!kthread_should_stop()) {
+ if (gfs2_withdrawn(sdp))
+ break;
- if (gfs2_withdrawn(sdp)) {
- msleep_interruptible(HZ);
- continue;
- }
/* Check for errors writing to the journal */
if (sdp->sd_log_error) {
gfs2_lm(sdp,
@@ -1311,7 +1309,7 @@ int gfs2_logd(void *data)
"prevent further damage.\n",
sdp->sd_fsname, sdp->sd_log_error);
gfs2_withdraw(sdp);
- continue;
+ break;
}
if (gfs2_jrnl_flush_reqd(sdp) || t == 0) {
@@ -1339,6 +1337,7 @@ int gfs2_logd(void *data)
gfs2_ail_flush_reqd(sdp) ||
gfs2_jrnl_flush_reqd(sdp) ||
sdp->sd_log_error ||
+ gfs2_withdrawn(sdp) ||
kthread_should_stop(),
t);
}
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 5201bb403fc6..3a3189f5104a 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -1559,9 +1559,9 @@ int gfs2_quotad(void *data)
unsigned long t = 0;
while (!kthread_should_stop()) {
-
if (gfs2_withdrawn(sdp))
- goto bypass;
+ break;
+
/* Update the master statfs file */
if (sdp->sd_statfs_force_sync) {
int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
@@ -1579,11 +1579,12 @@ int gfs2_quotad(void *data)
try_to_freeze();
-bypass:
t = min(quotad_timeo, statfs_timeo);
t = wait_event_interruptible_timeout(sdp->sd_quota_wait,
- sdp->sd_statfs_force_sync,
+ sdp->sd_statfs_force_sync ||
+ gfs2_withdrawn(sdp) ||
+ kthread_should_stop(),
t);
if (sdp->sd_statfs_force_sync)