To access non-default filesystem, we just need to subscribe to
mdsmap.<MDS_NAMESPACE_ID> and add a new mount option for mds
namespace id.
Signed-off-by: "Yan, Zheng" <zyan@xxxxxxxxxx>
---
fs/ceph/super.c | 19 ++++++++++++++++++-
fs/ceph/super.h | 1 +
2 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index c973043..7db4fd6 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -108,6 +108,7 @@ static int ceph_sync_fs(struct super_block *sb, int wait)
* mount options
*/
enum {
+ Opt_mds_namespace,
Opt_wsize,
Opt_rsize,
Opt_rasize,
@@ -143,6 +144,7 @@ enum {
};
static match_table_t fsopt_tokens = {
+ {Opt_mds_namespace, "mds_namespace=%d"},
{Opt_wsize, "wsize=%d"},
{Opt_rsize, "rsize=%d"},
{Opt_rasize, "rasize=%d"},
@@ -212,6 +214,9 @@ static int parse_fsopt_token(char *c, void *private)
break;
/* misc */
+ case Opt_mds_namespace:
+ fsopt->mds_namespace = intval;
+ break;
case Opt_wsize:
fsopt->wsize = intval;
break;
@@ -367,6 +372,7 @@ static int parse_mount_options(struct ceph_mount_options **pfsopt,
fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT;
fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
fsopt->congestion_kb = default_congestion_kb();
+ fsopt->mds_namespace = -1;
/*
* Distinguish the server list from the path in "dev_name".
@@ -457,6 +463,8 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
seq_puts(m, ",noacl");
#endif
+ if (fsopt->mds_namespace >= 0)
+ seq_printf(m, ",mds_namespace=%d", fsopt->mds_namespace);
if (fsopt->wsize)
seq_printf(m, ",wsize=%d", fsopt->wsize);
if (fsopt->rsize != CEPH_RSIZE_DEFAULT)
@@ -530,7 +538,16 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
goto fail;
}
fsc->client->extra_mon_dispatch = extra_mon_dispatch;
- ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, 0, true);
+
+ if (fsopt->mds_namespace < 0) {
+ ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP,
+ 0, true);
+ } else {
+ char mdsmap[CEPH_SUB_MAP_MAXLEN];
+ snprintf(mdsmap, sizeof(mdsmap), CEPH_SUB_MDSMAP".%d",
+ fsopt->mds_namespace);
+ ceph_monc_want_map(&fsc->client->monc, mdsmap, 0, true);
+ }
fsc->mount_options = fsopt;
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index c56ff5d..1aeba59 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -62,6 +62,7 @@ struct ceph_mount_options {
int cap_release_safety;
int max_readdir; /* max readdir result (entires) */
int max_readdir_bytes; /* max readdir result (bytes) */
+ int mds_namespace;
/*
* everything above this point can be memcmp'd; everything below
--
2.5.0
--
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