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author | Steven Whitehouse <swhiteho@redhat.com> | 2010-09-29 14:04:18 (GMT) |
---|---|---|
committer | Steven Whitehouse <swhiteho@redhat.com> | 2010-09-29 14:04:18 (GMT) |
commit | feb47ca9314666d920855b8a235032dea2b2caa4 (patch) | |
tree | 163a391bda495826747eb249cf74b42ad35bd5ec /fs/gfs2 | |
parent | 43f74c199563a4273e528e2166d0650625a1e05f (diff) | |
download | linux-fsl-qoriq-feb47ca9314666d920855b8a235032dea2b2caa4.tar.xz |
GFS2: Improve journal allocation via sysfs
Recently a feature was added to GFS2 to allow journal id allocation
via sysfs. This patch builds upon that so that a negative journal id
will be treated as an error code to be passed back as the return code
from mount. This allows termination of the mount process if there is
a failure.
Also, the process has been updated so that the kernel will wait
for a journal id, even in the "spectator" case. This is required
in order to avoid mounting a filesystem in case there is an error
while joining the cluster. In the spectator case, 0 is written into
the file to indicate that all is well, and that mount should continue.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r-- | fs/gfs2/incore.h | 2 | ||||
-rw-r--r-- | fs/gfs2/ops_fstype.c | 16 | ||||
-rw-r--r-- | fs/gfs2/sys.c | 17 |
3 files changed, 24 insertions, 11 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h index 6f6ff8a..764fbb4 100644 --- a/fs/gfs2/incore.h +++ b/fs/gfs2/incore.h @@ -494,7 +494,7 @@ struct gfs2_sb_host { */ struct lm_lockstruct { - unsigned int ls_jid; + int ls_jid; unsigned int ls_first; unsigned int ls_first_done; unsigned int ls_nodir; diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index 5b11f37..aeafc23 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -1056,8 +1056,6 @@ static int gfs2_journalid_wait(void *word) static int wait_on_journal(struct gfs2_sbd *sdp) { - if (sdp->sd_args.ar_spectator) - return 0; if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) return 0; @@ -1160,6 +1158,20 @@ static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent if (error) goto fail_sb; + /* + * If user space has failed to join the cluster or some similar + * failure has occurred, then the journal id will contain a + * negative (error) number. This will then be returned to the + * caller (of the mount syscall). We do this even for spectator + * mounts (which just write a jid of 0 to indicate "ok" even though + * the jid is unused in the spectator case) + */ + if (sdp->sd_lockstruct.ls_jid < 0) { + error = sdp->sd_lockstruct.ls_jid; + sdp->sd_lockstruct.ls_jid = 0; + goto fail_sb; + } + error = init_inodes(sdp, DO); if (error) goto fail_sb; diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c index ccacffd..64082a5 100644 --- a/fs/gfs2/sys.c +++ b/fs/gfs2/sys.c @@ -399,31 +399,32 @@ static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) { - return sprintf(buf, "%u\n", sdp->sd_lockstruct.ls_jid); + return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); } static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) { - unsigned jid; + int jid; int rv; - rv = sscanf(buf, "%u", &jid); + rv = sscanf(buf, "%d", &jid); if (rv != 1) return -EINVAL; spin_lock(&sdp->sd_jindex_spin); rv = -EINVAL; - if (sdp->sd_args.ar_spectator) - goto out; if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) goto out; rv = -EBUSY; - if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) + if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) goto out; + rv = 0; + if (sdp->sd_args.ar_spectator && jid > 0) + rv = jid = -EINVAL; sdp->sd_lockstruct.ls_jid = jid; + clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); smp_mb__after_clear_bit(); wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); - rv = 0; out: spin_unlock(&sdp->sd_jindex_spin); return rv ? rv : len; @@ -617,7 +618,7 @@ static int gfs2_uevent(struct kset *kset, struct kobject *kobj, add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) - add_uevent_var(env, "JOURNALID=%u", sdp->sd_lockstruct.ls_jid); + add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); if (gfs2_uuid_valid(uuid)) add_uevent_var(env, "UUID=%pUB", uuid); return 0; |