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Diffstat (limited to 'fs/ceph/mds_client.c')
-rw-r--r--fs/ceph/mds_client.c103
1 files changed, 65 insertions, 38 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index a75ddbf9fe37..fad95f8f2608 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -560,6 +560,13 @@ static void __unregister_request(struct ceph_mds_client *mdsc,
*
* Called under mdsc->mutex.
*/
+struct dentry *get_nonsnap_parent(struct dentry *dentry)
+{
+ while (!IS_ROOT(dentry) && ceph_snap(dentry->d_inode) != CEPH_NOSNAP)
+ dentry = dentry->d_parent;
+ return dentry;
+}
+
static int __choose_mds(struct ceph_mds_client *mdsc,
struct ceph_mds_request *req)
{
@@ -590,14 +597,29 @@ static int __choose_mds(struct ceph_mds_client *mdsc,
if (req->r_inode) {
inode = req->r_inode;
} else if (req->r_dentry) {
- if (req->r_dentry->d_inode) {
+ struct inode *dir = req->r_dentry->d_parent->d_inode;
+
+ if (dir->i_sb != mdsc->client->sb) {
+ /* not this fs! */
+ inode = req->r_dentry->d_inode;
+ } else if (ceph_snap(dir) != CEPH_NOSNAP) {
+ /* direct snapped/virtual snapdir requests
+ * based on parent dir inode */
+ struct dentry *dn =
+ get_nonsnap_parent(req->r_dentry->d_parent);
+ inode = dn->d_inode;
+ dout("__choose_mds using nonsnap parent %p\n", inode);
+ } else if (req->r_dentry->d_inode) {
+ /* dentry target */
inode = req->r_dentry->d_inode;
} else {
- inode = req->r_dentry->d_parent->d_inode;
+ /* dir + name */
+ inode = dir;
hash = req->r_dentry->d_name.hash;
is_hash = true;
}
}
+
dout("__choose_mds %p is_hash=%d (%d) mode %d\n", inode, (int)is_hash,
(int)hash, mode);
if (!inode)
@@ -2208,7 +2230,7 @@ static void handle_session(struct ceph_mds_session *session,
pr_info("mds%d reconnect denied\n", session->s_mds);
remove_session_caps(session);
wake = 1; /* for good measure */
- complete_all(&mdsc->session_close_waiters);
+ wake_up_all(&mdsc->session_close_wq);
kick_requests(mdsc, mds);
break;
@@ -2302,7 +2324,7 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
path = ceph_mdsc_build_path(dentry, &pathlen, &pathbase, 0);
if (IS_ERR(path)) {
err = PTR_ERR(path);
- BUG_ON(err);
+ goto out_dput;
}
} else {
path = NULL;
@@ -2310,7 +2332,7 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
}
err = ceph_pagelist_encode_string(pagelist, path, pathlen);
if (err)
- goto out;
+ goto out_free;
spin_lock(&inode->i_lock);
cap->seq = 0; /* reset cap seq */
@@ -2352,10 +2374,13 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
num_fcntl_locks,
num_flock_locks);
unlock_kernel();
+ } else {
+ err = ceph_pagelist_append(pagelist, &rec, reclen);
}
-out:
+out_free:
kfree(path);
+out_dput:
dput(dentry);
return err;
}
@@ -2876,7 +2901,7 @@ int ceph_mdsc_init(struct ceph_mds_client *mdsc, struct ceph_client *client)
return -ENOMEM;
init_completion(&mdsc->safe_umount_waiters);
- init_completion(&mdsc->session_close_waiters);
+ init_waitqueue_head(&mdsc->session_close_wq);
INIT_LIST_HEAD(&mdsc->waiting_for_map);
mdsc->sessions = NULL;
mdsc->max_sessions = 0;
@@ -3021,6 +3046,23 @@ void ceph_mdsc_sync(struct ceph_mds_client *mdsc)
wait_event(mdsc->cap_flushing_wq, check_cap_flush(mdsc, want_flush));
}
+/*
+ * true if all sessions are closed, or we force unmount
+ */
+bool done_closing_sessions(struct ceph_mds_client *mdsc)
+{
+ int i, n = 0;
+
+ if (mdsc->client->mount_state == CEPH_MOUNT_SHUTDOWN)
+ return true;
+
+ mutex_lock(&mdsc->mutex);
+ for (i = 0; i < mdsc->max_sessions; i++)
+ if (mdsc->sessions[i])
+ n++;
+ mutex_unlock(&mdsc->mutex);
+ return n == 0;
+}
/*
* called after sb is ro.
@@ -3029,45 +3071,32 @@ void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc)
{
struct ceph_mds_session *session;
int i;
- int n;
struct ceph_client *client = mdsc->client;
- unsigned long started, timeout = client->mount_args->mount_timeout * HZ;
+ unsigned long timeout = client->mount_args->mount_timeout * HZ;
dout("close_sessions\n");
- mutex_lock(&mdsc->mutex);
-
/* close sessions */
- started = jiffies;
- while (time_before(jiffies, started + timeout)) {
- dout("closing sessions\n");
- n = 0;
- for (i = 0; i < mdsc->max_sessions; i++) {
- session = __ceph_lookup_mds_session(mdsc, i);
- if (!session)
- continue;
- mutex_unlock(&mdsc->mutex);
- mutex_lock(&session->s_mutex);
- __close_session(mdsc, session);
- mutex_unlock(&session->s_mutex);
- ceph_put_mds_session(session);
- mutex_lock(&mdsc->mutex);
- n++;
- }
- if (n == 0)
- break;
-
- if (client->mount_state == CEPH_MOUNT_SHUTDOWN)
- break;
-
- dout("waiting for sessions to close\n");
+ mutex_lock(&mdsc->mutex);
+ for (i = 0; i < mdsc->max_sessions; i++) {
+ session = __ceph_lookup_mds_session(mdsc, i);
+ if (!session)
+ continue;
mutex_unlock(&mdsc->mutex);
- wait_for_completion_timeout(&mdsc->session_close_waiters,
- timeout);
+ mutex_lock(&session->s_mutex);
+ __close_session(mdsc, session);
+ mutex_unlock(&session->s_mutex);
+ ceph_put_mds_session(session);
mutex_lock(&mdsc->mutex);
}
+ mutex_unlock(&mdsc->mutex);
+
+ dout("waiting for sessions to close\n");
+ wait_event_timeout(mdsc->session_close_wq, done_closing_sessions(mdsc),
+ timeout);
/* tear down remaining sessions */
+ mutex_lock(&mdsc->mutex);
for (i = 0; i < mdsc->max_sessions; i++) {
if (mdsc->sessions[i]) {
session = get_session(mdsc->sessions[i]);
@@ -3080,9 +3109,7 @@ void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc)
mutex_lock(&mdsc->mutex);
}
}
-
WARN_ON(!list_empty(&mdsc->cap_delay_list));
-
mutex_unlock(&mdsc->mutex);
ceph_cleanup_empty_realms(mdsc);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 03:29:31 +0100