by passing a filename to a separate iovec regardless of its length.
Signed-off-by: Pavel Shilovsky <pshilovsky@xxxxxxxxx>
---
fs/cifs/smb2pdu.c | 59 ++++++++++++++++++++++-------------------------------
fs/cifs/smb2pdu.h | 2 +-
2 files changed, 25 insertions(+), 36 deletions(-)
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 4c046a5..9a35dcd 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -894,7 +894,7 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
__le16 *copy_path = NULL;
int copy_size;
int rc = 0;
- int num_iovecs = 2;
+ unsigned int num_iovecs = 2;
__u32 file_attributes = 0;
cifs_dbg(FYI, "create/open\n");
@@ -919,47 +919,36 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
req->CreateDisposition = cpu_to_le32(create_disposition);
req->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK);
uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
- req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)
- - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
+ /* do not count rfc1001 len field */
+ req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
iov[0].iov_base = (char *)req;
/* 4 for rfc1002 length field */
iov[0].iov_len = get_rfc1002_length(req) + 4;
/* MUST set path len (NameLength) to 0 opening root of share */
- if (uni_path_len >= 4) {
- req->NameLength = cpu_to_le16(uni_path_len - 2);
- /* -1 since last byte is buf[0] which is sent below (path) */
- iov[0].iov_len--;
- if (uni_path_len % 8 != 0) {
- copy_size = uni_path_len / 8 * 8;
- if (copy_size < uni_path_len)
- copy_size += 8;
-
- copy_path = kzalloc(copy_size, GFP_KERNEL);
- if (!copy_path)
- return -ENOMEM;
- memcpy((char *)copy_path, (const char *)path,
- uni_path_len);
- uni_path_len = copy_size;
- path = copy_path;
- }
-
- iov[1].iov_len = uni_path_len;
- iov[1].iov_base = path;
- /*
- * -1 since last byte is buf[0] which was counted in
- * smb2_buf_len.
- */
- inc_rfc1001_len(req, uni_path_len - 1);
- } else {
- iov[0].iov_len += 7;
- req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu(
- req->hdr.smb2_buf_length) + 8 - 1);
- num_iovecs = 1;
- req->NameLength = 0;
+ req->NameLength = cpu_to_le16(uni_path_len - 2);
+ /* -1 since last byte is buf[0] which is sent below (path) */
+ iov[0].iov_len--;
+ if (uni_path_len % 8 != 0) {
+ copy_size = uni_path_len / 8 * 8;
+ if (copy_size < uni_path_len)
+ copy_size += 8;
+
+ copy_path = kzalloc(copy_size, GFP_KERNEL);
+ if (!copy_path)
+ return -ENOMEM;
+ memcpy((char *)copy_path, (const char *)path,
+ uni_path_len);
+ uni_path_len = copy_size;
+ path = copy_path;
}
+ iov[1].iov_len = uni_path_len;
+ iov[1].iov_base = path;
+ /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
+ inc_rfc1001_len(req, uni_path_len - 1);
+
if (!server->oplocks)
*oplock = SMB2_OPLOCK_LEVEL_NONE;
@@ -976,7 +965,7 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
iov[num_iovecs].iov_len = sizeof(struct create_lease);
req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
req->CreateContextsOffset = cpu_to_le32(
- sizeof(struct smb2_create_req) - 4 - 8 +
+ sizeof(struct smb2_create_req) - 4 +
iov[num_iovecs-1].iov_len);
req->CreateContextsLength = cpu_to_le32(
sizeof(struct create_lease));
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index f31043b..8b1025f 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -428,7 +428,7 @@ struct smb2_create_req {
__le16 NameLength;
__le32 CreateContextsOffset;
__le32 CreateContextsLength;
- __u8 Buffer[8];
+ __u8 Buffer[0];
} __packed;
struct smb2_create_rsp {
--
1.7.10.4
--
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