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Groups > linux.kernel > #1715994 > unrolled thread
| Started by | Long Li <longli@exchange.microsoft.com> |
|---|---|
| First post | 2017-08-20 21:10 +0200 |
| Last post | 2017-08-20 21:10 +0200 |
| Articles | 1 — 1 participant |
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[Patch v2 08/19] CIFS: SMBD: Set SMBDirect maximum read or write size for I/O Long Li <longli@exchange.microsoft.com> - 2017-08-20 21:10 +0200
| From | Long Li <longli@exchange.microsoft.com> |
|---|---|
| Date | 2017-08-20 21:10 +0200 |
| Subject | [Patch v2 08/19] CIFS: SMBD: Set SMBDirect maximum read or write size for I/O |
| Message-ID | <ugDLH-2xW-15@gated-at.bofh.it> |
From: Long Li <longli@microsoft.com> When connecting over SMBDirect, 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> --- fs/cifs/smb2ops.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 06494e1..e67f5f0 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) @@ -249,7 +250,11 @@ 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); + if (server->rdma) + wsize = min_t(unsigned int, + wsize, server->smbd_conn->max_readwrite_size); + else + wsize = min_t(unsigned int, wsize, server->max_write); if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); @@ -265,7 +270,11 @@ 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); + if (server->rdma) + rsize = min_t(unsigned int, + rsize, server->smbd_conn->max_readwrite_size); + else + rsize = min_t(unsigned int, rsize, server->max_read); if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); -- 2.7.4
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