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authorPavel Shilovsky <pshilovsky@samba.org>2012-09-19 06:22:44 -0700
committerSteve French <smfrench@gmail.com>2012-09-24 21:46:33 -0500
commitb8c32dbb0deb287a5fcb78251e4eae6c7275760d (patch)
treefa3cddfd4595846921f51a922b7e1722b1e35fa4 /fs/cifs/cifsfs.c
parent579f9053236c796d718162c37c72bb3bd32d008c (diff)
CIFS: Request SMB2.1 leases
if server supports them and we need oplocks. Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/cifsfs.c')
-rw-r--r--fs/cifs/cifsfs.c28
1 files changed, 21 insertions, 7 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 4cd68c77ce3..28ac048d54e 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -36,6 +36,7 @@
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/namei.h>
+#include <linux/random.h>
#include <net/ipv6.h>
#include "cifsfs.h"
#include "cifspdu.h"
@@ -88,6 +89,10 @@ extern mempool_t *cifs_mid_poolp;
struct workqueue_struct *cifsiod_wq;
+#ifdef CONFIG_CIFS_SMB2
+__u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE];
+#endif
+
static int
cifs_read_super(struct super_block *sb)
{
@@ -218,9 +223,10 @@ cifs_alloc_inode(struct super_block *sb)
return NULL;
cifs_inode->cifsAttrs = 0x20; /* default */
cifs_inode->time = 0;
- /* Until the file is open and we have gotten oplock
- info back from the server, can not assume caching of
- file data or metadata */
+ /*
+ * Until the file is open and we have gotten oplock info back from the
+ * server, can not assume caching of file data or metadata.
+ */
cifs_set_oplock_level(cifs_inode, 0);
cifs_inode->delete_pending = false;
cifs_inode->invalid_mapping = false;
@@ -228,10 +234,14 @@ cifs_alloc_inode(struct super_block *sb)
cifs_inode->server_eof = 0;
cifs_inode->uniqueid = 0;
cifs_inode->createtime = 0;
-
- /* Can not set i_flags here - they get immediately overwritten
- to zero by the VFS */
-/* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
+#ifdef CONFIG_CIFS_SMB2
+ get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE);
+#endif
+ /*
+ * Can not set i_flags here - they get immediately overwritten to zero
+ * by the VFS.
+ */
+ /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
INIT_LIST_HEAD(&cifs_inode->openFileList);
INIT_LIST_HEAD(&cifs_inode->llist);
return &cifs_inode->vfs_inode;
@@ -1107,6 +1117,10 @@ init_cifs(void)
spin_lock_init(&cifs_file_list_lock);
spin_lock_init(&GlobalMid_Lock);
+#ifdef CONFIG_CIFS_SMB2
+ get_random_bytes(cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
+#endif
+
if (cifs_max_pending < 2) {
cifs_max_pending = 2;
cFYI(1, "cifs_max_pending set to min of 2");