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authorDavid Teigland <teigland@redhat.com>2012-01-09 17:18:05 -0500
committerSteven Whitehouse <swhiteho@redhat.com>2012-01-11 09:23:05 +0000
commite0c2a9aa1e68455dc3439e95d85cabcaff073666 (patch)
tree22e0dea3972d74defb0219fbbcd5c9d395c0bdb3 /fs/gfs2/sys.c
parente343a895a9f342f239c5e3c5ffc6c0b1707e6244 (diff)
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GFS2: dlm based recovery coordination
This new method of managing recovery is an alternative to the previous approach of using the userland gfs_controld. - use dlm slot numbers to assign journal id's - use dlm recovery callbacks to initiate journal recovery - use a dlm lock to determine the first node to mount fs - use a dlm lock to track journals that need recovery Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/sys.c')
-rw-r--r--fs/gfs2/sys.c33
1 files changed, 21 insertions, 12 deletions
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 443cabc..d33172c 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -298,7 +298,7 @@ static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
ssize_t ret;
int val = 0;
- if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
+ if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
val = 1;
ret = sprintf(buf, "%d\n", val);
return ret;
@@ -313,9 +313,9 @@ static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
val = simple_strtol(buf, NULL, 0);
if (val == 1)
- set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
+ set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
else if (val == 0) {
- clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
+ clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
smp_mb__after_clear_bit();
gfs2_glock_thaw(sdp);
} else {
@@ -350,8 +350,8 @@ static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
goto out;
if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
goto out;
- sdp->sd_lockstruct.ls_first = first;
- rv = 0;
+ sdp->sd_lockstruct.ls_first = first;
+ rv = 0;
out:
spin_unlock(&sdp->sd_jindex_spin);
return rv ? rv : len;
@@ -360,19 +360,14 @@ out:
static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
{
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
- return sprintf(buf, "%d\n", ls->ls_first_done);
+ return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
}
-static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
{
- unsigned jid;
struct gfs2_jdesc *jd;
int rv;
- rv = sscanf(buf, "%u", &jid);
- if (rv != 1)
- return -EINVAL;
-
rv = -ESHUTDOWN;
spin_lock(&sdp->sd_jindex_spin);
if (test_bit(SDF_NORECOVERY, &sdp->sd_flags))
@@ -389,6 +384,20 @@ static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
}
out:
spin_unlock(&sdp->sd_jindex_spin);
+ return rv;
+}
+
+static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+{
+ unsigned jid;
+ int rv;
+
+ rv = sscanf(buf, "%u", &jid);
+ if (rv != 1)
+ return -EINVAL;
+
+ rv = gfs2_recover_set(sdp, jid);
+
return rv ? rv : len;
}
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