ocfs2: Add support for heartbeat=global mount option
Adds support for heartbeat=global mount option. It ensures that the heartbeat
mode passed matches the one enabled on disk.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index d5496a7..481387b 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -243,7 +243,7 @@
enum ocfs2_mount_options
{
- OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */
+ OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */
OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
@@ -256,6 +256,8 @@
control lists */
OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */
OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */
+ OCFS2_MOUNT_HB_NONE = 1 << 12, /* No heartbeat */
+ OCFS2_MOUNT_HB_GLOBAL = 1 << 13, /* Global heartbeat */
};
#define OCFS2_OSB_SOFT_RO 0x0001
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index d5b1d99..28ff536 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -376,6 +376,7 @@
/* Parameter passed from mount.ocfs2 to module */
#define OCFS2_HB_NONE "heartbeat=none"
#define OCFS2_HB_LOCAL "heartbeat=local"
+#define OCFS2_HB_GLOBAL "heartbeat=global"
/*
* OCFS2 directory file types. Only the low 3 bits are used. The
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 7554317..4e009ad 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -162,6 +162,7 @@
Opt_nointr,
Opt_hb_none,
Opt_hb_local,
+ Opt_hb_global,
Opt_data_ordered,
Opt_data_writeback,
Opt_atime_quantum,
@@ -190,6 +191,7 @@
{Opt_nointr, "nointr"},
{Opt_hb_none, OCFS2_HB_NONE},
{Opt_hb_local, OCFS2_HB_LOCAL},
+ {Opt_hb_global, OCFS2_HB_GLOBAL},
{Opt_data_ordered, "data=ordered"},
{Opt_data_writeback, "data=writeback"},
{Opt_atime_quantum, "atime_quantum=%u"},
@@ -608,6 +610,7 @@
int ret = 0;
struct mount_options parsed_options;
struct ocfs2_super *osb = OCFS2_SB(sb);
+ u32 tmp;
lock_kernel();
@@ -617,8 +620,9 @@
goto out;
}
- if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
- (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
+ tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
+ OCFS2_MOUNT_HB_NONE;
+ if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
ret = -EINVAL;
mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
goto out;
@@ -809,23 +813,29 @@
static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
{
- if (ocfs2_mount_local(osb)) {
- if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
+ u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
+
+ if (osb->s_mount_opt & hb_enabled) {
+ if (ocfs2_mount_local(osb)) {
mlog(ML_ERROR, "Cannot heartbeat on a locally "
"mounted device.\n");
return -EINVAL;
}
- }
-
- if (ocfs2_userspace_stack(osb)) {
- if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
+ if (ocfs2_userspace_stack(osb)) {
mlog(ML_ERROR, "Userspace stack expected, but "
"o2cb heartbeat arguments passed to mount\n");
return -EINVAL;
}
+ if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
+ !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
+ ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
+ ocfs2_cluster_o2cb_global_heartbeat(osb))) {
+ mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
+ return -EINVAL;
+ }
}
- if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
+ if (!(osb->s_mount_opt & hb_enabled)) {
if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
!ocfs2_userspace_stack(osb)) {
mlog(ML_ERROR, "Heartbeat has to be started to mount "
@@ -1291,6 +1301,7 @@
{
int status;
char *p;
+ u32 tmp;
mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
options ? options : "(none)");
@@ -1322,7 +1333,10 @@
mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
break;
case Opt_hb_none:
- mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
+ mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
+ break;
+ case Opt_hb_global:
+ mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
break;
case Opt_barrier:
if (match_int(&args[0], &option)) {
@@ -1477,6 +1491,15 @@
}
}
+ /* Ensure only one heartbeat mode */
+ tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
+ OCFS2_MOUNT_HB_NONE);
+ if (hweight32(tmp) != 1) {
+ mlog(ML_ERROR, "Invalid heartbeat mount options\n");
+ status = 0;
+ goto bail;
+ }
+
status = 1;
bail:
@@ -1490,10 +1513,14 @@
unsigned long opts = osb->s_mount_opt;
unsigned int local_alloc_megs;
- if (opts & OCFS2_MOUNT_HB_LOCAL)
- seq_printf(s, ",_netdev,heartbeat=local");
- else
- seq_printf(s, ",heartbeat=none");
+ if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
+ seq_printf(s, ",_netdev");
+ if (opts & OCFS2_MOUNT_HB_LOCAL)
+ seq_printf(s, ",%s", OCFS2_HB_LOCAL);
+ else
+ seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
+ } else
+ seq_printf(s, ",%s", OCFS2_HB_NONE);
if (opts & OCFS2_MOUNT_NOINTR)
seq_printf(s, ",nointr");
