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Subject[PATCH v3 07/10] ceph-rbd: some super.c changes for rbd
Date
 - add 'snap' mount option
- add ceph_client_id helper

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
---
fs/ceph/super.c | 19 ++++++++++++++++++-
fs/ceph/super.h | 2 ++
2 files changed, 20 insertions(+), 1 deletions(-)

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 43b1589..acff12f 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -342,6 +342,7 @@ enum {
Opt_snapdirname,
Opt_name,
Opt_secret,
+ Opt_snap,
Opt_last_string,
/* string args above */
Opt_ip,
@@ -374,6 +375,7 @@ static match_table_t arg_tokens = {
{Opt_snapdirname, "snapdirname=%s"},
{Opt_name, "name=%s"},
{Opt_secret, "secret=%s"},
+ {Opt_snap, "snap=%s"},
/* string args above */
{Opt_ip, "ip=%s"},
{Opt_noshare, "noshare"},
@@ -508,6 +510,11 @@ struct ceph_mount_args *parse_mount_args(int flags, char *options,
argstr[0].to-argstr[0].from,
GFP_KERNEL);
break;
+ case Opt_snap:
+ args->snap = kstrndup(argstr[0].from,
+ argstr[0].to-argstr[0].from,
+ GFP_KERNEL);
+ break;

/* misc */
case Opt_wsize:
@@ -582,6 +589,7 @@ void ceph_destroy_mount_args(struct ceph_mount_args *args)
kfree(args->snapdir_name);
kfree(args->name);
kfree(args->secret);
+ kfree(args->snap);
kfree(args);
}

@@ -621,6 +629,10 @@ int ceph_compare_mount_args(struct ceph_mount_args *new_args,
if (ret)
return ret;

+ ret = strcmp_null(args1->snap, args2->snap);
+ if (ret)
+ return ret;
+
for (i = 0; i < args1->num_mon; i++) {
if (ceph_monmap_contains(client->monc.monmap,
&args1->mon_addr[i]))
@@ -717,6 +729,11 @@ fail:
return ERR_PTR(err);
}

+u64 ceph_client_id(struct ceph_client *client)
+{
+ return client->monc.auth->global_id;
+}
+
void ceph_destroy_client(struct ceph_client *client)
{
dout("destroy_client %p\n", client);
@@ -767,7 +784,7 @@ int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
}
} else {
pr_info("client%lld fsid " FSID_FORMAT "\n",
- client->monc.auth->global_id, PR_FSID(fsid));
+ ceph_client_id(client), PR_FSID(fsid));
memcpy(&client->fsid, fsid, sizeof(*fsid));
ceph_debugfs_client_init(client);
client->have_fsid = true;
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index ee67b81..67d5b75 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -74,6 +74,7 @@ struct ceph_mount_args {
char *snapdir_name; /* default ".snap" */
char *name;
char *secret;
+ char *snap; /* rbd snapshot */
};

/*
@@ -751,6 +752,7 @@ extern int ceph_compare_mount_args(struct ceph_mount_args *new_args,
struct ceph_client *client);
extern struct ceph_client *ceph_create_client(struct ceph_mount_args *args,
int need_mdsc);
+extern u64 ceph_client_id(struct ceph_client *client);
extern void ceph_destroy_client(struct ceph_client *client);
extern int ceph_open_session(struct ceph_client *client);

--
1.5.6.5


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