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OpenCloudOS-Kernel
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Merge git://git.samba.org/sfrench/cifs-2.6 

* git://git.samba.org/sfrench/cifs-2.6:
  cifs: check for NULL last_entry before calling cifs_save_resume_key
  cifs: attempt to freeze while looping on a receive attempt
  cifs: Fix sparse warning when calling cifs_strtoUCS
  CIFS: Add descriptions to the brlock cache functions
This commit is contained in:
Linus Torvalds 2011-12-09 14:45:44 -08:00
parent a776878d6c 7023676f9e
commit 8def5f51b0
4 changed files with 39 additions and 5 deletions
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2
fs/cifs/connect.c
View File

@ -441,6 +441,8 @@ cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
smb_msg.msg_controllen = 0;
for (total_read = 0; to_read; total_read += length, to_read -= length) {
try_to_freeze();
if (server_unresponsive(server)) {
total_read = -EAGAIN;
break;

26
fs/cifs/file.c
View File

@ -702,6 +702,13 @@ cifs_find_lock_conflict(struct cifsInodeInfo *cinode, struct cifsLockInfo *lock,
lock->type, lock->netfid, conf_lock);
}
/*
* Check if there is another lock that prevents us to set the lock (mandatory
* style). If such a lock exists, update the flock structure with its
* properties. Otherwise, set the flock type to F_UNLCK if we can cache brlocks
* or leave it the same if we can't. Returns 0 if we don't need to request to
* the server or 1 otherwise.
*/
static int
cifs_lock_test(struct cifsInodeInfo *cinode, __u64 offset, __u64 length,
__u8 type, __u16 netfid, struct file_lock *flock)
@ -739,6 +746,12 @@ cifs_lock_add(struct cifsInodeInfo *cinode, struct cifsLockInfo *lock)
mutex_unlock(&cinode->lock_mutex);
}
/*
* Set the byte-range lock (mandatory style). Returns:
* 1) 0, if we set the lock and don't need to request to the server;
* 2) 1, if no locks prevent us but we need to request to the server;
* 3) -EACCESS, if there is a lock that prevents us and wait is false.
*/
static int
cifs_lock_add_if(struct cifsInodeInfo *cinode, struct cifsLockInfo *lock,
bool wait)
@ -778,6 +791,13 @@ try_again:
return rc;
}
/*
* Check if there is another lock that prevents us to set the lock (posix
* style). If such a lock exists, update the flock structure with its
* properties. Otherwise, set the flock type to F_UNLCK if we can cache brlocks
* or leave it the same if we can't. Returns 0 if we don't need to request to
* the server or 1 otherwise.
*/
static int
cifs_posix_lock_test(struct file *file, struct file_lock *flock)
{
@ -800,6 +820,12 @@ cifs_posix_lock_test(struct file *file, struct file_lock *flock)
return rc;
}
/*
* Set the byte-range lock (posix style). Returns:
* 1) 0, if we set the lock and don't need to request to the server;
* 2) 1, if we need to request to the server;
* 3) <0, if the error occurs while setting the lock.
*/
static int
cifs_posix_lock_set(struct file *file, struct file_lock *flock)
{

10
fs/cifs/readdir.c
View File

@ -554,7 +554,10 @@ static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
rc);
return rc;
}
cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
/* FindFirst/Next set last_entry to NULL on malformed reply */
if (cifsFile->srch_inf.last_entry)
cifs_save_resume_key(cifsFile->srch_inf.last_entry,
cifsFile);
}
while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
@ -562,7 +565,10 @@ static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
cFYI(1, "calling findnext2");
rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
&cifsFile->srch_inf);
cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
/* FindFirst/Next set last_entry to NULL on malformed reply */
if (cifsFile->srch_inf.last_entry)
cifs_save_resume_key(cifsFile->srch_inf.last_entry,
cifsFile);
if (rc)
return -ENOENT;
}

6
fs/cifs/smbencrypt.c
View File

@ -209,7 +209,7 @@ E_md4hash(const unsigned char *passwd, unsigned char *p16,
{
int rc;
int len;
__u16 wpwd[129];
__le16 wpwd[129];
/* Password cannot be longer than 128 characters */
if (passwd) /* Password must be converted to NT unicode */
@ -219,8 +219,8 @@ E_md4hash(const unsigned char *passwd, unsigned char *p16,
*wpwd = 0; /* Ensure string is null terminated */
}
rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__u16));
memset(wpwd, 0, 129 * sizeof(__u16));
rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__le16));
memset(wpwd, 0, 129 * sizeof(__le16));
return rc;
}