diff options
| author | Ronnie Sahlberg <lsahlber@redhat.com> | 2018-03-31 11:45:31 +1100 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2018-04-02 13:09:44 -0500 |
| commit | 93012bf984163f6616d1ab606a7cd86095c052c6 (patch) | |
| tree | 5f72bd3f1e727d2e1d85a33be1a95cc5ab350971 /fs/cifs/smb2pdu.c | |
| parent | 21a4e14aaedbc85f203d37e56cb26235b22b43f6 (diff) | |
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/smb2pdu.c')
| -rw-r--r-- | fs/cifs/smb2pdu.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index af62c75b17c4..0e04b577758d 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1471,7 +1471,7 @@ parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, unsigned int remaining; char *name; - data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset); + data_offset = (char *)rsp + server->vals->header_preamble_size + le32_to_cpu(rsp->CreateContextsOffset); remaining = le32_to_cpu(rsp->CreateContextsLength); cc = (struct create_context *)data_offset; while (remaining >= sizeof(struct create_context)) { @@ -3452,6 +3452,7 @@ static int build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, int outbuf_len, u64 persistent_fid, u64 volatile_fid) { + struct TCP_Server_Info *server = tcon->ses->server; int rc; struct smb2_query_info_req *req; unsigned int total_len; @@ -3474,7 +3475,7 @@ build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, req->InputBufferOffset = cpu_to_le16(sizeof(struct smb2_query_info_req) - 1); req->OutputBufferLength = cpu_to_le32( - outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); + outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - server->vals->header_preamble_size); iov->iov_base = (char *)req; iov->iov_len = total_len; @@ -3491,6 +3492,7 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, int rc = 0; int resp_buftype; struct cifs_ses *ses = tcon->ses; + struct TCP_Server_Info *server = ses->server; struct smb2_fs_full_size_info *info = NULL; int flags = 0; @@ -3511,7 +3513,7 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, } rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; - info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + + info = (struct smb2_fs_full_size_info *)(server->vals->header_preamble_size + le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, @@ -3534,6 +3536,7 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, int rc = 0; int resp_buftype, max_len, min_len; struct cifs_ses *ses = tcon->ses; + struct TCP_Server_Info *server = ses->server; unsigned int rsp_len, offset; int flags = 0; @@ -3574,15 +3577,15 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, goto qfsattr_exit; if (level == FS_ATTRIBUTE_INFORMATION) - memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset + memcpy(&tcon->fsAttrInfo, server->vals->header_preamble_size + offset + (char *)&rsp->hdr, min_t(unsigned int, rsp_len, max_len)); else if (level == FS_DEVICE_INFORMATION) - memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset + memcpy(&tcon->fsDevInfo, server->vals->header_preamble_size + offset + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO)); else if (level == FS_SECTOR_SIZE_INFORMATION) { struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) - (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr); + (server->vals->header_preamble_size + offset + (char *)&rsp->hdr); tcon->ss_flags = le32_to_cpu(ss_info->Flags); tcon->perf_sector_size = le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); |