CIFS: Add SMB2 support for is_path_accessible
that needs for a successful mount through SMB2 protocol.
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 48c04b2..ef0769c 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -829,3 +829,135 @@
return rc;
}
+
+int
+SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
+ u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access,
+ __u32 create_disposition, __u32 file_attributes, __u32 create_options)
+{
+ struct smb2_create_req *req;
+ struct smb2_create_rsp *rsp;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses = tcon->ses;
+ struct kvec iov[2];
+ int resp_buftype;
+ int uni_path_len;
+ int rc = 0;
+ int num_iovecs = 2;
+
+ cFYI(1, "create/open");
+
+ if (ses && (ses->server))
+ server = ses->server;
+ else
+ return -EIO;
+
+ rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (enable_oplocks)
+ req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_BATCH;
+ else
+ req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
+ req->ImpersonationLevel = IL_IMPERSONATION;
+ req->DesiredAccess = cpu_to_le32(desired_access);
+ /* File attributes ignored on open (used in create though) */
+ req->FileAttributes = cpu_to_le32(file_attributes);
+ req->ShareAccess = FILE_SHARE_ALL_LE;
+ req->CreateDisposition = cpu_to_le32(create_disposition);
+ req->CreateOptions = cpu_to_le32(create_options);
+ uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
+ req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)
+ - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
+
+ 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--;
+ 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 {
+ num_iovecs = 1;
+ req->NameLength = 0;
+ }
+
+ rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
+ rsp = (struct smb2_create_rsp *)iov[0].iov_base;
+
+ if (rc != 0) {
+ cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
+ goto creat_exit;
+ }
+
+ if (rsp == NULL) {
+ rc = -EIO;
+ goto creat_exit;
+ }
+ *persistent_fid = rsp->PersistentFileId;
+ *volatile_fid = rsp->VolatileFileId;
+creat_exit:
+ free_rsp_buf(resp_buftype, rsp);
+ return rc;
+}
+
+int
+SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid)
+{
+ struct smb2_close_req *req;
+ struct smb2_close_rsp *rsp;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses = tcon->ses;
+ struct kvec iov[1];
+ int resp_buftype;
+ int rc = 0;
+
+ cFYI(1, "Close");
+
+ if (ses && (ses->server))
+ server = ses->server;
+ else
+ return -EIO;
+
+ rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ req->PersistentFileId = persistent_fid;
+ req->VolatileFileId = volatile_fid;
+
+ iov[0].iov_base = (char *)req;
+ /* 4 for rfc1002 length field */
+ iov[0].iov_len = get_rfc1002_length(req) + 4;
+
+ rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
+ rsp = (struct smb2_close_rsp *)iov[0].iov_base;
+
+ if (rc != 0) {
+ if (tcon)
+ cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
+ goto close_exit;
+ }
+
+ if (rsp == NULL) {
+ rc = -EIO;
+ goto close_exit;
+ }
+
+ /* BB FIXME - decode close response, update inode for caching */
+
+close_exit:
+ free_rsp_buf(resp_buftype, rsp);
+ return rc;
+}