diff options
| -rw-r--r-- | fs/cifs/cifsglob.h | 3 | ||||
| -rw-r--r-- | fs/cifs/connect.c | 3 | ||||
| -rw-r--r-- | fs/cifs/smb2ops.c | 8 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.c | 49 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.h | 12 | ||||
| -rw-r--r-- | fs/cifs/smb2proto.h | 1 |
6 files changed, 73 insertions, 3 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 0c53a8339253..ae9a1e900c15 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -73,6 +73,9 @@ /* (max path length + 1 for null) * 2 for unicode */ #define MAX_NAME 514 +/* SMB echo "timeout" -- FIXME: tunable? */ +#define SMB_ECHO_INTERVAL (60 * HZ) + #include "cifspdu.h" #ifndef XATTR_DOS_ATTRIB diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index a83ed766aa94..5ab173fd6339 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -56,9 +56,6 @@ #define CIFS_PORT 445 #define RFC1001_PORT 139 -/* SMB echo "timeout" -- FIXME: tunable? */ -#define SMB_ECHO_INTERVAL (60 * HZ) - extern mempool_t *cifs_req_poolp; /* FIXME: should these be tunable? */ diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 8672e49d1c4c..483bd0ba2ecb 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -207,6 +207,12 @@ smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, return NULL; } +static bool +smb2_can_echo(struct TCP_Server_Info *server) +{ + return server->echoes; +} + struct smb_version_operations smb21_operations = { .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, @@ -226,6 +232,8 @@ struct smb_version_operations smb21_operations = { .tree_connect = SMB2_tcon, .tree_disconnect = SMB2_tdis, .is_path_accessible = smb2_is_path_accessible, + .can_echo = smb2_can_echo, + .echo = SMB2_echo, .query_path_info = smb2_query_path_info, .get_srv_inum = smb2_get_srv_inum, .build_path_to_root = smb2_build_path_to_root, diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 7ef5324786a6..373b6945161f 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1074,3 +1074,52 @@ qinf_exit: free_rsp_buf(resp_buftype, rsp); return rc; } + +/* + * This is a no-op for now. We're not really interested in the reply, but + * rather in the fact that the server sent one and that server->lstrp + * gets updated. + * + * FIXME: maybe we should consider checking that the reply matches request? + */ +static void +smb2_echo_callback(struct mid_q_entry *mid) +{ + struct TCP_Server_Info *server = mid->callback_data; + struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; + unsigned int credits_received = 1; + + if (mid->mid_state == MID_RESPONSE_RECEIVED) + credits_received = le16_to_cpu(smb2->hdr.CreditRequest); + + DeleteMidQEntry(mid); + add_credits(server, credits_received, CIFS_ECHO_OP); +} + +int +SMB2_echo(struct TCP_Server_Info *server) +{ + struct smb2_echo_req *req; + int rc = 0; + struct kvec iov; + + cFYI(1, "In echo request"); + + rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); + if (rc) + return rc; + + req->hdr.CreditRequest = cpu_to_le16(1); + + iov.iov_base = (char *)req; + /* 4 for rfc1002 length field */ + iov.iov_len = get_rfc1002_length(req) + 4; + + rc = cifs_call_async(server, &iov, 1, NULL, smb2_echo_callback, server, + CIFS_ECHO_OP); + if (rc) + cFYI(1, "Echo request failed: %d", rc); + + cifs_small_buf_release(req); + return rc; +} diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 9151e9040b02..59aae608d366 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -448,6 +448,18 @@ struct smb2_close_rsp { __le32 Attributes; } __packed; +struct smb2_echo_req { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 4 */ + __u16 Reserved; +} __packed; + +struct smb2_echo_rsp { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 4 */ + __u16 Reserved; +} __packed; + /* Possible InfoType values */ #define SMB2_O_INFO_FILE 0x01 #define SMB2_O_INFO_FILESYSTEM 0x02 diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 1a17955c35c9..902bbe2b5ad3 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -73,5 +73,6 @@ extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, extern int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_file_id, u64 volatile_file_id, struct smb2_file_all_info *data); +extern int SMB2_echo(struct TCP_Server_Info *server); #endif /* _SMB2PROTO_H */ |