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authorGang He <ghe@suse.com>2020-06-02 07:45:29 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-02 20:59:05 +0300
commit912f655d78c5d4ad05eac287f23a435924df7144 (patch)
treefb3448ec94b6c63c27b961e94bf3f6176d9585b1 /fs/ocfs2/super.c
parent8f745e62a1926e57a671b0841241b60e80903dda (diff)
downloadlinux-912f655d78c5d4ad05eac287f23a435924df7144.tar.xz
ocfs2: mount shared volume without ha stack
Usually we create and use a ocfs2 shared volume on the top of ha stack. For pcmk based ha stack, which includes DLM, corosync and pacemaker services. The customers complained they could not mount existent ocfs2 volume in the single node without ha stack, e.g. single node backup/restore scenario. Like this case, the customers just want to access the data from the existent ocfs2 volume quickly, but do not want to restart or setup ha stack. Then, I'd like to add a mount option "nocluster", if the users use this option to mount a ocfs2 shared volume, the whole mount will not depend on the ha related services. the command will mount the existent ocfs2 volume directly (like local mount), for avoiding setup the ha stack. Signed-off-by: Gang He <ghe@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Jun Piao <piaojun@huawei.com> Link: http://lkml.kernel.org/r/20200423053300.22661-1-ghe@suse.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/super.c')
-rw-r--r--fs/ocfs2/super.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index ac61eeaf3837..71ea9ce71a6b 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -175,6 +175,7 @@ enum {
Opt_dir_resv_level,
Opt_journal_async_commit,
Opt_err_cont,
+ Opt_nocluster,
Opt_err,
};
@@ -208,6 +209,7 @@ static const match_table_t tokens = {
{Opt_dir_resv_level, "dir_resv_level=%u"},
{Opt_journal_async_commit, "journal_async_commit"},
{Opt_err_cont, "errors=continue"},
+ {Opt_nocluster, "nocluster"},
{Opt_err, NULL}
};
@@ -619,6 +621,13 @@ static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
goto out;
}
+ tmp = OCFS2_MOUNT_NOCLUSTER;
+ if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
+ ret = -EINVAL;
+ mlog(ML_ERROR, "Cannot change nocluster option on remount\n");
+ goto out;
+ }
+
tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
OCFS2_MOUNT_HB_NONE;
if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
@@ -859,6 +868,7 @@ static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
}
if (ocfs2_userspace_stack(osb) &&
+ !(osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) &&
strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
OCFS2_STACK_LABEL_LEN)) {
mlog(ML_ERROR,
@@ -1139,6 +1149,11 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
"ordered");
+ if ((osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) &&
+ !(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT))
+ printk(KERN_NOTICE "ocfs2: The shared device (%s) is mounted "
+ "without cluster aware mode.\n", osb->dev_str);
+
atomic_set(&osb->vol_state, VOLUME_MOUNTED);
wake_up(&osb->osb_mount_event);
@@ -1445,6 +1460,9 @@ static int ocfs2_parse_options(struct super_block *sb,
case Opt_journal_async_commit:
mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
break;
+ case Opt_nocluster:
+ mopt->mount_opt |= OCFS2_MOUNT_NOCLUSTER;
+ break;
default:
mlog(ML_ERROR,
"Unrecognized mount option \"%s\" "
@@ -1556,6 +1574,9 @@ static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
seq_printf(s, ",journal_async_commit");
+ if (opts & OCFS2_MOUNT_NOCLUSTER)
+ seq_printf(s, ",nocluster");
+
return 0;
}