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authorLinus Torvalds <torvalds@linux-foundation.org>2010-04-08 11:58:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-04-08 11:58:14 -0700
commit9ddd3a31aedcdb55d5509b595c04b187041c8adb (patch)
tree210582aade8b4342b2abfbc3682dd2014456d23b /fs/cifs/cifssmb.c
parentd620a7cf05d4f12f5bbb1060d766e8139ab31458 (diff)
parentf05337c6ac48d19d354e0640a8eb8fc884f82bcc (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: not overwriting file_lock structure after GET_LK cifs: Fix a kernel BUG with remote OS/2 server (try #3) [CIFS] initialize nbytes at the beginning of CIFSSMBWrite() [CIFS] Add mmap for direct, nobrl cifs mount types
Diffstat (limited to 'fs/cifs/cifssmb.c')
-rw-r--r--fs/cifs/cifssmb.c34
1 files changed, 32 insertions, 2 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 3f4fbd67050..5d3f29fef53 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1431,6 +1431,8 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
__u32 bytes_sent;
__u16 byte_count;
+ *nbytes = 0;
+
/* cFYI(1, ("write at %lld %d bytes", offset, count));*/
if (tcon->ses == NULL)
return -ECONNABORTED;
@@ -1513,11 +1515,18 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
cifs_stats_inc(&tcon->num_writes);
if (rc) {
cFYI(1, ("Send error in write = %d", rc));
- *nbytes = 0;
} else {
*nbytes = le16_to_cpu(pSMBr->CountHigh);
*nbytes = (*nbytes) << 16;
*nbytes += le16_to_cpu(pSMBr->Count);
+
+ /*
+ * Mask off high 16 bits when bytes written as returned by the
+ * server is greater than bytes requested by the client. Some
+ * OS/2 servers are known to set incorrect CountHigh values.
+ */
+ if (*nbytes > count)
+ *nbytes &= 0xFFFF;
}
cifs_buf_release(pSMB);
@@ -1606,6 +1615,14 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
*nbytes = le16_to_cpu(pSMBr->CountHigh);
*nbytes = (*nbytes) << 16;
*nbytes += le16_to_cpu(pSMBr->Count);
+
+ /*
+ * Mask off high 16 bits when bytes written as returned by the
+ * server is greater than bytes requested by the client. OS/2
+ * servers are known to set incorrect CountHigh values.
+ */
+ if (*nbytes > count)
+ *nbytes &= 0xFFFF;
}
/* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
@@ -1794,8 +1811,21 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
}
parm_data = (struct cifs_posix_lock *)
((char *)&pSMBr->hdr.Protocol + data_offset);
- if (parm_data->lock_type == cpu_to_le16(CIFS_UNLCK))
+ if (parm_data->lock_type == __constant_cpu_to_le16(CIFS_UNLCK))
pLockData->fl_type = F_UNLCK;
+ else {
+ if (parm_data->lock_type ==
+ __constant_cpu_to_le16(CIFS_RDLCK))
+ pLockData->fl_type = F_RDLCK;
+ else if (parm_data->lock_type ==
+ __constant_cpu_to_le16(CIFS_WRLCK))
+ pLockData->fl_type = F_WRLCK;
+
+ pLockData->fl_start = parm_data->start;
+ pLockData->fl_end = parm_data->start +
+ parm_data->length - 1;
+ pLockData->fl_pid = parm_data->pid;
+ }
}
plk_err_exit: