From 8339dd32fbad71834d61b9103e8884ada9bf3e1c Mon Sep 17 00:00:00 2001 From: Long Li Date: Tue, 7 Nov 2017 01:54:55 -0700 Subject: CIFS: SMBD: Add rdma mount option Add "rdma" to CIFS mount options to connect to SMB Direct. Add checks to validate this is used on SMB 3.X dialects. To connect to SMBDirect, use "mount.cifs -o rdma,vers=3.x". At the time of this patch, 3.x can be 3.0, 3.02 or 3.1.1. Signed-off-by: Long Li Reviewed-by: Pavel Shilovsky Signed-off-by: Steve French Acked-by: Ronnie Sahlberg --- fs/cifs/connect.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'fs/cifs/connect.c') diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 0bfc2280436d..64be6f9e54a2 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -92,7 +92,7 @@ enum { Opt_multiuser, Opt_sloppy, Opt_nosharesock, Opt_persistent, Opt_nopersistent, Opt_resilient, Opt_noresilient, - Opt_domainauto, + Opt_domainauto, Opt_rdma, /* Mount options which take numeric value */ Opt_backupuid, Opt_backupgid, Opt_uid, @@ -183,6 +183,7 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_resilient, "resilienthandles"}, { Opt_noresilient, "noresilienthandles"}, { Opt_domainauto, "domainauto"}, + { Opt_rdma, "rdma"}, { Opt_backupuid, "backupuid=%s" }, { Opt_backupgid, "backupgid=%s" }, @@ -1550,6 +1551,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, case Opt_domainauto: vol->domainauto = true; break; + case Opt_rdma: + vol->rdma = true; + break; /* Numeric Values */ case Opt_backupuid: @@ -1951,6 +1955,11 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, goto cifs_parse_mount_err; } + if (vol->rdma && vol->vals->protocol_id < SMB30_PROT_ID) { + cifs_dbg(VFS, "SMB Direct requires Version >=3.0\n"); + goto cifs_parse_mount_err; + } + #ifndef CONFIG_KEYS /* Muliuser mounts require CONFIG_KEYS support */ if (vol->multiuser) { @@ -2162,6 +2171,9 @@ static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) if (server->echo_interval != vol->echo_interval * HZ) return 0; + if (server->rdma != vol->rdma) + return 0; + return 1; } @@ -2260,6 +2272,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info) tcp_ses->noblocksnd = volume_info->noblocksnd; tcp_ses->noautotune = volume_info->noautotune; tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; + tcp_ses->rdma = volume_info->rdma; tcp_ses->in_flight = 0; tcp_ses->credits = 1; init_waitqueue_head(&tcp_ses->response_q); -- cgit v1.2.3