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gfs2: Add new sysfs file for gfs2 status

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This patch adds a new file: /sys/fs/gfs2/*/status which will report
the status of the file system. Catting this file dumps the current
status of the file system according to various superblock variables.
For example:

Journal Checked:          1
Journal Live:             1
Journal ID:               0
Spectator:                0
Withdrawn:                0
No barriers:              0
No recovery:              0
Demote:                   0
No Journal ID:            1
Mounted RO:               0
RO Recovery:              0
Skip DLM Unlock:          0
Force AIL Flush:          0
FS Frozen:                0
Withdrawing:              0
Withdraw In Prog:         0
Remote Withdraw:          0
Withdraw Recovery:        0
sd_log_error:             0
sd_log_flush_lock:        0
sd_log_num_revoke:        0
sd_log_in_flight:         0
sd_log_blks_needed:       0
sd_log_blks_free:         32768
sd_log_flush_head:        0
sd_log_flush_tail:        5384
sd_log_blks_reserved:     0
sd_log_revokes_available: 503

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Bob Peterson 2020-05-22 13:54:41 -05:00 committed by Andreas Gruenbacher
parent bea906ee16
commit 9f9eb5a516
1 changed files with 67 additions and 0 deletions
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67
fs/gfs2/sys.c
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@ -63,6 +63,71 @@ static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
}
static ssize_t status_show(struct gfs2_sbd *sdp, char *buf)
{
unsigned long f = sdp->sd_flags;
ssize_t s;
s = snprintf(buf, PAGE_SIZE,
"Journal Checked: %d\n"
"Journal Live: %d\n"
"Journal ID: %d\n"
"Spectator: %d\n"
"Withdrawn: %d\n"
"No barriers: %d\n"
"No recovery: %d\n"
"Demote: %d\n"
"No Journal ID: %d\n"
"Mounted RO: %d\n"
"RO Recovery: %d\n"
"Skip DLM Unlock: %d\n"
"Force AIL Flush: %d\n"
"FS Frozen: %d\n"
"Withdrawing: %d\n"
"Withdraw In Prog: %d\n"
"Remote Withdraw: %d\n"
"Withdraw Recovery: %d\n"
"sd_log_error: %d\n"
"sd_log_flush_lock: %d\n"
"sd_log_num_revoke: %u\n"
"sd_log_in_flight: %d\n"
"sd_log_blks_needed: %d\n"
"sd_log_blks_free: %d\n"
"sd_log_flush_head: %d\n"
"sd_log_flush_tail: %d\n"
"sd_log_blks_reserved: %d\n"
"sd_log_revokes_available: %d\n",
test_bit(SDF_JOURNAL_CHECKED, &f),
test_bit(SDF_JOURNAL_LIVE, &f),
(sdp->sd_jdesc ? sdp->sd_jdesc->jd_jid : 0),
(sdp->sd_args.ar_spectator ? 1 : 0),
test_bit(SDF_WITHDRAWN, &f),
test_bit(SDF_NOBARRIERS, &f),
test_bit(SDF_NORECOVERY, &f),
test_bit(SDF_DEMOTE, &f),
test_bit(SDF_NOJOURNALID, &f),
(sb_rdonly(sdp->sd_vfs) ? 1 : 0),
test_bit(SDF_RORECOVERY, &f),
test_bit(SDF_SKIP_DLM_UNLOCK, &f),
test_bit(SDF_FORCE_AIL_FLUSH, &f),
test_bit(SDF_FS_FROZEN, &f),
test_bit(SDF_WITHDRAWING, &f),
test_bit(SDF_WITHDRAW_IN_PROG, &f),
test_bit(SDF_REMOTE_WITHDRAW, &f),
test_bit(SDF_WITHDRAW_RECOVERY, &f),
sdp->sd_log_error,
rwsem_is_locked(&sdp->sd_log_flush_lock),
sdp->sd_log_num_revoke,
atomic_read(&sdp->sd_log_in_flight),
atomic_read(&sdp->sd_log_blks_needed),
atomic_read(&sdp->sd_log_blks_free),
sdp->sd_log_flush_head,
sdp->sd_log_flush_tail,
sdp->sd_log_blks_reserved,
atomic_read(&sdp->sd_log_revokes_available));
return s;
}
static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
@ -283,6 +348,7 @@ GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
GFS2_ATTR(status, 0400, status_show, NULL);
static struct attribute *gfs2_attrs[] = {
&gfs2_attr_id.attr,
@ -295,6 +361,7 @@ static struct attribute *gfs2_attrs[] = {
&gfs2_attr_quota_refresh_user.attr,
&gfs2_attr_quota_refresh_group.attr,
&gfs2_attr_demote_rq.attr,
&gfs2_attr_status.attr,
NULL,
};
ATTRIBUTE_GROUPS(gfs2);