diff options
| author | Ronnie Sahlberg <lsahlber@redhat.com> | 2018-03-31 03:45:31 +0300 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2018-04-02 21:09:44 +0300 |
| commit | 93012bf984163f6616d1ab606a7cd86095c052c6 (patch) | |
| tree | 5f72bd3f1e727d2e1d85a33be1a95cc5ab350971 /fs/cifs/connect.c | |
| parent | 21a4e14aaedbc85f203d37e56cb26235b22b43f6 (diff) | |
| download | linux-93012bf984163f6616d1ab606a7cd86095c052c6.tar.xz | |
cifs: add server->vals->header_preamble_size
This variable is set to 4 for all protocol versions and replaces
the hardcoded constant 4 throughought the code.
This will later be updated to reflect whether a response packet
has a 4 byte length preamble or not once we start removing this
field from the SMB2+ dialects.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to 'fs/cifs/connect.c')
| -rw-r--r-- | fs/cifs/connect.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 4af41b01e0e9..4e0808f40195 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -775,7 +775,8 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) unsigned int pdu_length = get_rfc1002_length(buf); /* make sure this will fit in a large buffer */ - if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { + if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - + server->vals->header_preamble_size) { cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); cifs_reconnect(server); wake_up(&server->response_q); @@ -791,7 +792,9 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) /* now read the rest */ length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, - pdu_length - HEADER_SIZE(server) + 1 + 4); + pdu_length - HEADER_SIZE(server) + 1 + + server->vals->header_preamble_size); + if (length < 0) return length; server->total_read += length; @@ -884,7 +887,8 @@ cifs_demultiplex_thread(void *p) continue; /* make sure we have enough to get to the MID */ - if (pdu_length < HEADER_SIZE(server) - 1 - 4) { + if (pdu_length < HEADER_SIZE(server) - 1 - + server->vals->header_preamble_size) { cifs_dbg(VFS, "SMB response too short (%u bytes)\n", pdu_length); cifs_reconnect(server); @@ -893,8 +897,10 @@ cifs_demultiplex_thread(void *p) } /* read down to the MID */ - length = cifs_read_from_socket(server, buf + 4, - HEADER_SIZE(server) - 1 - 4); + length = cifs_read_from_socket(server, + buf + server->vals->header_preamble_size, + HEADER_SIZE(server) - 1 + - server->vals->header_preamble_size); if (length < 0) continue; server->total_read += length; |