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-rw-r--r--fs/cifs/cifsglob.h25
-rw-r--r--fs/cifs/cifspdu.h2
-rw-r--r--fs/cifs/misc.c10
-rw-r--r--fs/cifs/smb1ops.c4
-rw-r--r--fs/cifs/smb2transport.c2
-rw-r--r--fs/cifs/transport.c2
6 files changed, 35 insertions, 10 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 06e8947fc370..670da1e55be7 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -622,11 +622,34 @@ set_credits(struct TCP_Server_Info *server, const int val)
}
static inline __u64
-get_next_mid(struct TCP_Server_Info *server)
+get_next_mid64(struct TCP_Server_Info *server)
{
return server->ops->get_next_mid(server);
}
+static inline __le16
+get_next_mid(struct TCP_Server_Info *server)
+{
+ __u16 mid = get_next_mid64(server);
+ /*
+ * The value in the SMB header should be little endian for easy
+ * on-the-wire decoding.
+ */
+ return cpu_to_le16(mid);
+}
+
+static inline __u16
+get_mid(const struct smb_hdr *smb)
+{
+ return le16_to_cpu(smb->Mid);
+}
+
+static inline bool
+compare_mid(__u16 mid, const struct smb_hdr *smb)
+{
+ return mid == le16_to_cpu(smb->Mid);
+}
+
/*
* When the server supports very large reads and writes via POSIX extensions,
* we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index d40bd77a2392..f80f98f5ef9c 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -428,7 +428,7 @@ struct smb_hdr {
__u16 Tid;
__le16 Pid;
__u16 Uid;
- __u16 Mid;
+ __le16 Mid;
__u8 WordCount;
} __attribute__((packed));
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 298e31e3bdc6..2f9f3790679d 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -295,7 +295,8 @@ check_smb_hdr(struct smb_hdr *smb)
if (smb->Command == SMB_COM_LOCKING_ANDX)
return 0;
- cifs_dbg(VFS, "Server sent request, not response. mid=%u\n", smb->Mid);
+ cifs_dbg(VFS, "Server sent request, not response. mid=%u\n",
+ get_mid(smb));
return 1;
}
@@ -351,6 +352,7 @@ checkSMB(char *buf, unsigned int total_read)
}
if (4 + rfclen != clc_len) {
+ __u16 mid = get_mid(smb);
/* check if bcc wrapped around for large read responses */
if ((rfclen > 64 * 1024) && (rfclen > clc_len)) {
/* check if lengths match mod 64K */
@@ -358,11 +360,11 @@ checkSMB(char *buf, unsigned int total_read)
return 0; /* bcc wrapped */
}
cifs_dbg(FYI, "Calculated size %u vs length %u mismatch for mid=%u\n",
- clc_len, 4 + rfclen, smb->Mid);
+ clc_len, 4 + rfclen, mid);
if (4 + rfclen < clc_len) {
cifs_dbg(VFS, "RFC1001 size %u smaller than SMB for mid=%u\n",
- rfclen, smb->Mid);
+ rfclen, mid);
return -EIO;
} else if (rfclen > clc_len + 512) {
/*
@@ -375,7 +377,7 @@ checkSMB(char *buf, unsigned int total_read)
* data to 512 bytes.
*/
cifs_dbg(VFS, "RFC1001 size %u more than 512 bytes larger than SMB for mid=%u\n",
- rfclen, smb->Mid);
+ rfclen, mid);
return -EIO;
}
}
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index 8233b174de3d..09ef8f322c2a 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -67,7 +67,7 @@ send_nt_cancel(struct TCP_Server_Info *server, void *buf,
mutex_unlock(&server->srv_mutex);
cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
- in_buf->Mid, rc);
+ get_mid(in_buf), rc);
return rc;
}
@@ -101,7 +101,7 @@ cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
spin_lock(&GlobalMid_Lock);
list_for_each_entry(mid, &server->pending_mid_q, qhead) {
- if (mid->mid == buf->Mid &&
+ if (compare_mid(mid->mid, buf) &&
mid->mid_state == MID_REQUEST_SUBMITTED &&
le16_to_cpu(mid->command) == buf->Command) {
spin_unlock(&GlobalMid_Lock);
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 340abca3aa52..c523617eade2 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -466,7 +466,7 @@ smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
static inline void
smb2_seq_num_into_buf(struct TCP_Server_Info *server, struct smb2_hdr *hdr)
{
- hdr->MessageId = get_next_mid(server);
+ hdr->MessageId = get_next_mid64(server);
}
static struct mid_q_entry *
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 800b938e4061..0ee6d249ef6f 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -58,7 +58,7 @@ AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server)
return temp;
else {
memset(temp, 0, sizeof(struct mid_q_entry));
- temp->mid = smb_buffer->Mid; /* always LE */
+ temp->mid = get_mid(smb_buffer);
temp->pid = current->pid;
temp->command = cpu_to_le16(smb_buffer->Command);
cifs_dbg(FYI, "For smb_command %d\n", smb_buffer->Command);