diff options
| author | Long Li | 2017-11-22 17:38:39 -0700 |
|---|---|---|
| committer | Steve French | 2018-01-24 19:49:06 -0600 |
| commit | 09902f8dc849fd9d3f1258a5c926c5d5472646b1 (patch) | |
| tree | ae92c884bd55e1e9a7ca28b14bac56d65eaf717c | |
| parent | bce9ce7cc0766f5fe532cb89567ca2ac5ad80a1f (diff) | |
CIFS: SMBD: Set SMB Direct maximum read or write size for I/O
When connecting over SMB Direct, the transport negotiates its maximum I/O sizes
with the server and determines how to choose to do RDMA send/recv vs
read/write. Expose these maximum I/O sizes to upper layer so we will get the
correct sized payloads.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
| -rw-r--r-- | fs/cifs/smb2ops.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index ed88ab8a4774..c8fa4c4ccc50 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -32,6 +32,7 @@ #include "smb2status.h" #include "smb2glob.h" #include "cifs_ioctl.h" +#include "smbdirect.h" static int change_conf(struct TCP_Server_Info *server) @@ -250,7 +251,11 @@ smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) /* start with specified wsize, or default */ wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE; wsize = min_t(unsigned int, wsize, server->max_write); - +#ifdef CONFIG_CIFS_SMB_DIRECT + if (server->rdma) + wsize = min_t(unsigned int, + wsize, server->smbd_conn->max_readwrite_size); +#endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); @@ -266,6 +271,11 @@ smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) /* start with specified rsize, or default */ rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE; rsize = min_t(unsigned int, rsize, server->max_read); +#ifdef CONFIG_CIFS_SMB_DIRECT + if (server->rdma) + rsize = min_t(unsigned int, + rsize, server->smbd_conn->max_readwrite_size); +#endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); |