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CIFS: Process oplocks for SMB2

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Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Pavel Shilovsky
2012-09-18 16:20:33 -07:00
committed by Steve French
parent d324f08d6a
commit 2e44b28878
7 changed files with 68 additions and 12 deletions
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34
fs/cifs/smb2ops.c
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@@ -23,6 +23,7 @@
#include "smb2proto.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "smb2status.h"
static int
change_conf(struct TCP_Server_Info *server)
@@ -207,13 +208,14 @@ smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
int rc;
__u64 persistent_fid, volatile_fid;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, NULL);
FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL);
if (rc) {
kfree(utf16_path);
return rc;
@@ -358,10 +360,10 @@ smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
static void
smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
{
/* struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); */
struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
cfile->fid.persistent_fid = fid->persistent_fid;
cfile->fid.volatile_fid = fid->volatile_fid;
/* cifs_set_oplock_level(cinode, oplock); */
smb2_set_oplock_level(cinode, oplock);
/* cinode->can_cache_brlcks = cinode->clientCanCacheAll; */
}
@@ -432,6 +434,7 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
{
__le16 *utf16_path;
int rc;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
__u64 persistent_fid, volatile_fid;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
@@ -440,7 +443,7 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
FILE_READ_ATTRIBUTES | FILE_READ_DATA, FILE_OPEN, 0, 0,
NULL);
&oplock, NULL);
kfree(utf16_path);
if (rc) {
cERROR(1, "open dir failed");
@@ -477,6 +480,28 @@ smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
}
/*
* If we negotiate SMB2 protocol and get STATUS_PENDING - update
* the number of credits and return true. Otherwise - return false.
*/
static bool
smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
{
struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
if (le32_to_cpu(hdr->Status) != STATUS_PENDING)
return false;
if (!length) {
spin_lock(&server->req_lock);
server->credits += le16_to_cpu(hdr->CreditRequest);
spin_unlock(&server->req_lock);
wake_up(&server->request_q);
}
return true;
}
struct smb_version_operations smb21_operations = {
.setup_request = smb2_setup_request,
.setup_async_request = smb2_setup_async_request,
@@ -530,6 +555,7 @@ struct smb_version_operations smb21_operations = {
.query_dir_next = smb2_query_dir_next,
.close_dir = smb2_close_dir,
.calc_smb_size = smb2_calc_size,
.is_status_pending = smb2_is_status_pending,
};
struct smb_version_values smb21_values = {