diff options
author | Sage Weil <sage@inktank.com> | 2012-08-19 19:29:16 (GMT) |
---|---|---|
committer | Sage Weil <sage@inktank.com> | 2012-08-20 17:03:15 (GMT) |
commit | d1c338a509cea5378df59629ad47382810c38623 (patch) | |
tree | da12e11b8ae0df8ae424d1cef0d98eac095e2268 | |
parent | 6dab7ede9390d4d937cb89feca932e4fd575d2da (diff) | |
download | linux-d1c338a509cea5378df59629ad47382810c38623.tar.xz |
libceph: delay debugfs initialization until we learn global_id
The debugfs directory includes the cluster fsid and our unique global_id.
We need to delay the initialization of the debug entry until we have
learned both the fsid and our global_id from the monitor or else the
second client can't create its debugfs entry and will fail (and multiple
client instances aren't properly reflected in debugfs).
Reported by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>
-rw-r--r-- | fs/ceph/debugfs.c | 1 | ||||
-rw-r--r-- | net/ceph/ceph_common.c | 1 | ||||
-rw-r--r-- | net/ceph/debugfs.c | 4 | ||||
-rw-r--r-- | net/ceph/mon_client.c | 51 |
4 files changed, 51 insertions, 6 deletions
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c index fb962ef..6d59006 100644 --- a/fs/ceph/debugfs.c +++ b/fs/ceph/debugfs.c @@ -201,6 +201,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc) int err = -ENOMEM; dout("ceph_fs_debugfs_init\n"); + BUG_ON(!fsc->client->debugfs_dir); fsc->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb", 0600, diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index 69e38db..a802029 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -84,7 +84,6 @@ int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid) return -1; } } else { - pr_info("client%lld fsid %pU\n", ceph_client_id(client), fsid); memcpy(&client->fsid, fsid, sizeof(*fsid)); } return 0; diff --git a/net/ceph/debugfs.c b/net/ceph/debugfs.c index 54b531a..38b5dc1 100644 --- a/net/ceph/debugfs.c +++ b/net/ceph/debugfs.c @@ -189,6 +189,9 @@ int ceph_debugfs_client_init(struct ceph_client *client) snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid, client->monc.auth->global_id); + dout("ceph_debugfs_client_init %p %s\n", client, name); + + BUG_ON(client->debugfs_dir); client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir); if (!client->debugfs_dir) goto out; @@ -234,6 +237,7 @@ out: void ceph_debugfs_client_cleanup(struct ceph_client *client) { + dout("ceph_debugfs_client_cleanup %p\n", client); debugfs_remove(client->debugfs_osdmap); debugfs_remove(client->debugfs_monmap); debugfs_remove(client->osdc.debugfs_file); diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c index 105d533..900ea0f 100644 --- a/net/ceph/mon_client.c +++ b/net/ceph/mon_client.c @@ -311,6 +311,17 @@ int ceph_monc_open_session(struct ceph_mon_client *monc) EXPORT_SYMBOL(ceph_monc_open_session); /* + * We require the fsid and global_id in order to initialize our + * debugfs dir. + */ +static bool have_debugfs_info(struct ceph_mon_client *monc) +{ + dout("have_debugfs_info fsid %d globalid %lld\n", + (int)monc->client->have_fsid, monc->auth->global_id); + return monc->client->have_fsid && monc->auth->global_id > 0; +} + +/* * The monitor responds with mount ack indicate mount success. The * included client ticket allows the client to talk to MDSs and OSDs. */ @@ -320,9 +331,12 @@ static void ceph_monc_handle_map(struct ceph_mon_client *monc, struct ceph_client *client = monc->client; struct ceph_monmap *monmap = NULL, *old = monc->monmap; void *p, *end; + int had_debugfs_info, init_debugfs = 0; mutex_lock(&monc->mutex); + had_debugfs_info = have_debugfs_info(monc); + dout("handle_monmap\n"); p = msg->front.iov_base; end = p + msg->front.iov_len; @@ -344,12 +358,22 @@ static void ceph_monc_handle_map(struct ceph_mon_client *monc, if (!client->have_fsid) { client->have_fsid = true; + if (!had_debugfs_info && have_debugfs_info(monc)) { + pr_info("client%lld fsid %pU\n", + ceph_client_id(monc->client), + &monc->client->fsid); + init_debugfs = 1; + } mutex_unlock(&monc->mutex); - /* - * do debugfs initialization without mutex to avoid - * creating a locking dependency - */ - ceph_debugfs_client_init(client); + + if (init_debugfs) { + /* + * do debugfs initialization without mutex to avoid + * creating a locking dependency + */ + ceph_debugfs_client_init(monc->client); + } + goto out_unlocked; } out: @@ -865,8 +889,10 @@ static void handle_auth_reply(struct ceph_mon_client *monc, { int ret; int was_auth = 0; + int had_debugfs_info, init_debugfs = 0; mutex_lock(&monc->mutex); + had_debugfs_info = have_debugfs_info(monc); if (monc->auth->ops) was_auth = monc->auth->ops->is_authenticated(monc->auth); monc->pending_auth = 0; @@ -889,7 +915,22 @@ static void handle_auth_reply(struct ceph_mon_client *monc, __send_subscribe(monc); __resend_generic_request(monc); } + + if (!had_debugfs_info && have_debugfs_info(monc)) { + pr_info("client%lld fsid %pU\n", + ceph_client_id(monc->client), + &monc->client->fsid); + init_debugfs = 1; + } mutex_unlock(&monc->mutex); + + if (init_debugfs) { + /* + * do debugfs initialization without mutex to avoid + * creating a locking dependency + */ + ceph_debugfs_client_init(monc->client); + } } static int __validate_auth(struct ceph_mon_client *monc) |