diff options
| author | Rohith Surabattula <rohiths@microsoft.com> | 2021-04-13 00:26:42 -0500 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-05-03 11:20:35 -0500 |
| commit | c3f207ab29f793b8c942ce8067ed123f18d5b81b (patch) | |
| tree | ecfa1fdb80e4aa3281c34008d6962d61eb471573 /fs/cifs/cifsfs.c | |
| parent | fee742b502894c8ed02506fff61d7605934f93cb (diff) | |
| download | linux-c3f207ab29f793b8c942ce8067ed123f18d5b81b.tar.gz | |
cifs: Deferred close for files
When file is closed, SMB2 close request is not sent to server
immediately and is deferred for acregmax defined interval. When file is
reopened by same process for read or write, the file handle
is reused if an oplock is held.
When client receives a oplock/lease break, file is closed immediately
if reference count is zero, else oplock is downgraded.
Signed-off-by: Rohith Surabattula <rohiths@microsoft.com>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/cifsfs.c')
| -rw-r--r-- | fs/cifs/cifsfs.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 44fd850f05c16..8a6894577697c 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -133,6 +133,7 @@ struct workqueue_struct *cifsiod_wq; struct workqueue_struct *decrypt_wq; struct workqueue_struct *fileinfo_put_wq; struct workqueue_struct *cifsoplockd_wq; +struct workqueue_struct *deferredclose_wq; __u32 cifs_lock_secret; /* @@ -390,6 +391,8 @@ cifs_alloc_inode(struct super_block *sb) /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */ INIT_LIST_HEAD(&cifs_inode->openFileList); INIT_LIST_HEAD(&cifs_inode->llist); + INIT_LIST_HEAD(&cifs_inode->deferred_closes); + spin_lock_init(&cifs_inode->deferred_lock); return &cifs_inode->vfs_inode; } @@ -1637,9 +1640,16 @@ init_cifs(void) goto out_destroy_fileinfo_put_wq; } + deferredclose_wq = alloc_workqueue("deferredclose", + WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); + if (!deferredclose_wq) { + rc = -ENOMEM; + goto out_destroy_cifsoplockd_wq; + } + rc = cifs_fscache_register(); if (rc) - goto out_destroy_cifsoplockd_wq; + goto out_destroy_deferredclose_wq; rc = cifs_init_inodecache(); if (rc) @@ -1707,6 +1717,8 @@ out_destroy_inodecache: cifs_destroy_inodecache(); out_unreg_fscache: cifs_fscache_unregister(); +out_destroy_deferredclose_wq: + destroy_workqueue(deferredclose_wq); out_destroy_cifsoplockd_wq: destroy_workqueue(cifsoplockd_wq); out_destroy_fileinfo_put_wq: @@ -1741,6 +1753,7 @@ exit_cifs(void) cifs_destroy_mids(); cifs_destroy_inodecache(); cifs_fscache_unregister(); + destroy_workqueue(deferredclose_wq); destroy_workqueue(cifsoplockd_wq); destroy_workqueue(decrypt_wq); destroy_workqueue(fileinfo_put_wq); |