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authorYan, Zheng <zyan@redhat.com>2015-10-27 18:36:06 +0800
committerIlya Dryomov <idryomov@gmail.com>2015-11-02 23:36:48 +0100
commit68cd5b4b7612c2956d8553dfb39490b29f32566d (patch)
treee66461c4e1241a3dc5797a650a16683470185140 /fs/ceph
parent4c06ace81a60636dec358c288ef6aaf3aa6dc599 (diff)
downloadlinux-68cd5b4b7612c2956d8553dfb39490b29f32566d.tar.bz2
ceph: make fsync() wait unsafe requests that created/modified inode
If we get a unsafe reply for request that created/modified inode, add the unsafe request to a list in the newly created/modified inode. So we can make fsync() wait these unsafe requests. Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/caps.c71
-rw-r--r--fs/ceph/inode.c1
-rw-r--r--fs/ceph/mds_client.c14
-rw-r--r--fs/ceph/mds_client.h3
-rw-r--r--fs/ceph/super.h1
5 files changed, 53 insertions, 37 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 349315332040..c69e1253b47b 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1970,49 +1970,46 @@ out:
}
/*
- * wait for any uncommitted directory operations to commit.
+ * wait for any unsafe requests to complete.
*/
-static int unsafe_dirop_wait(struct inode *inode)
+static int unsafe_request_wait(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
- struct list_head *head = &ci->i_unsafe_dirops;
- struct ceph_mds_request *req;
- u64 last_tid;
- int ret = 0;
-
- if (!S_ISDIR(inode->i_mode))
- return 0;
+ struct ceph_mds_request *req1 = NULL, *req2 = NULL;
+ int ret, err = 0;
spin_lock(&ci->i_unsafe_lock);
- if (list_empty(head))
- goto out;
-
- req = list_last_entry(head, struct ceph_mds_request,
- r_unsafe_dir_item);
- last_tid = req->r_tid;
-
- do {
- ceph_mdsc_get_request(req);
- spin_unlock(&ci->i_unsafe_lock);
+ if (S_ISDIR(inode->i_mode) && !list_empty(&ci->i_unsafe_dirops)) {
+ req1 = list_last_entry(&ci->i_unsafe_dirops,
+ struct ceph_mds_request,
+ r_unsafe_dir_item);
+ ceph_mdsc_get_request(req1);
+ }
+ if (!list_empty(&ci->i_unsafe_iops)) {
+ req2 = list_last_entry(&ci->i_unsafe_iops,
+ struct ceph_mds_request,
+ r_unsafe_target_item);
+ ceph_mdsc_get_request(req2);
+ }
+ spin_unlock(&ci->i_unsafe_lock);
- dout("unsafe_dirop_wait %p wait on tid %llu (until %llu)\n",
- inode, req->r_tid, last_tid);
- ret = !wait_for_completion_timeout(&req->r_safe_completion,
- ceph_timeout_jiffies(req->r_timeout));
+ dout("unsafe_requeset_wait %p wait on tid %llu %llu\n",
+ inode, req1 ? req1->r_tid : 0ULL, req2 ? req2->r_tid : 0ULL);
+ if (req1) {
+ ret = !wait_for_completion_timeout(&req1->r_safe_completion,
+ ceph_timeout_jiffies(req1->r_timeout));
if (ret)
- ret = -EIO; /* timed out */
-
- ceph_mdsc_put_request(req);
-
- spin_lock(&ci->i_unsafe_lock);
- if (ret || list_empty(head))
- break;
- req = list_first_entry(head, struct ceph_mds_request,
- r_unsafe_dir_item);
- } while (req->r_tid < last_tid);
-out:
- spin_unlock(&ci->i_unsafe_lock);
- return ret;
+ err = -EIO;
+ ceph_mdsc_put_request(req1);
+ }
+ if (req2) {
+ ret = !wait_for_completion_timeout(&req2->r_safe_completion,
+ ceph_timeout_jiffies(req2->r_timeout));
+ if (ret)
+ err = -EIO;
+ ceph_mdsc_put_request(req2);
+ }
+ return err;
}
int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
@@ -2038,7 +2035,7 @@ int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
dirty = try_flush_caps(inode, &flush_tid);
dout("fsync dirty caps are %s\n", ceph_cap_string(dirty));
- ret = unsafe_dirop_wait(inode);
+ ret = unsafe_request_wait(inode);
/*
* only wait on non-file metadata writeback (the mds
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 96d2bd829902..498dcfa2dcdb 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -452,6 +452,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
INIT_LIST_HEAD(&ci->i_unsafe_writes);
INIT_LIST_HEAD(&ci->i_unsafe_dirops);
+ INIT_LIST_HEAD(&ci->i_unsafe_iops);
spin_lock_init(&ci->i_unsafe_lock);
ci->i_snap_realm = NULL;
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 1e47a3d1d12f..89838a226fe9 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -666,6 +666,12 @@ static void __unregister_request(struct ceph_mds_client *mdsc,
list_del_init(&req->r_unsafe_dir_item);
spin_unlock(&ci->i_unsafe_lock);
}
+ if (req->r_target_inode && req->r_got_unsafe) {
+ struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
+ spin_lock(&ci->i_unsafe_lock);
+ list_del_init(&req->r_unsafe_target_item);
+ spin_unlock(&ci->i_unsafe_lock);
+ }
if (req->r_unsafe_dir) {
iput(req->r_unsafe_dir);
@@ -1707,6 +1713,7 @@ ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode)
req->r_started = jiffies;
req->r_resend_mds = -1;
INIT_LIST_HEAD(&req->r_unsafe_dir_item);
+ INIT_LIST_HEAD(&req->r_unsafe_target_item);
req->r_fmode = -1;
kref_init(&req->r_kref);
INIT_LIST_HEAD(&req->r_wait);
@@ -2529,6 +2536,13 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
up_read(&mdsc->snap_rwsem);
if (realm)
ceph_put_snap_realm(mdsc, realm);
+
+ if (err == 0 && req->r_got_unsafe && req->r_target_inode) {
+ struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
+ spin_lock(&ci->i_unsafe_lock);
+ list_add_tail(&req->r_unsafe_target_item, &ci->i_unsafe_iops);
+ spin_unlock(&ci->i_unsafe_lock);
+ }
out_err:
mutex_lock(&mdsc->mutex);
if (!req->r_aborted) {
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index f575eafe2261..ccf11ef0ca87 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -236,6 +236,9 @@ struct ceph_mds_request {
struct inode *r_unsafe_dir;
struct list_head r_unsafe_dir_item;
+ /* unsafe requests that modify the target inode */
+ struct list_head r_unsafe_target_item;
+
struct ceph_mds_session *r_session;
int r_attempts; /* resend attempts */
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 2f2460d23a06..75b7d125ce66 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -342,6 +342,7 @@ struct ceph_inode_info {
struct list_head i_unsafe_writes; /* uncommitted sync writes */
struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
+ struct list_head i_unsafe_iops; /* uncommitted mds inode ops */
spinlock_t i_unsafe_lock;
struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */