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| author | Pavel Shilovsky <pshilovsky@samba.org> | 2014-06-05 19:03:27 +0400 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2014-08-02 01:23:03 -0500 |
| commit | cb7e9eabb2b584884db0d11ae0376d31ac1cfdc1 (patch) | |
| tree | 4f6fd78f74b173359dd673b8bf49b8f188aab0be /fs/cifs/cifsglob.h | |
| parent | 6ec0b01b2691d1465bb7219e031e8bf38ccd9397 (diff) | |
| download | linux-stable-cb7e9eabb2b584884db0d11ae0376d31ac1cfdc1.tar.gz linux-stable-cb7e9eabb2b584884db0d11ae0376d31ac1cfdc1.tar.bz2 linux-stable-cb7e9eabb2b584884db0d11ae0376d31ac1cfdc1.zip | |
CIFS: Use multicredits for SMB 2.1/3 writes
If we negotiate SMB 2.1 and higher version of the protocol and
a server supports large write buffer size, we need to consume 1
credit per 65536 bytes. So, we need to know how many credits
we have and obtain the required number of them before constructing
a writedata structure in writepages and iovec write.
Reviewed-by: Shirish Pargaonkar <spargaonkar@suse.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/cifsglob.h')
| -rw-r--r-- | fs/cifs/cifsglob.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 8c53f2093152..54ca2b985a0d 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -406,6 +406,9 @@ struct smb_version_operations { int); /* writepages retry size */ unsigned int (*wp_retry_size)(struct inode *); + /* get mtu credits */ + int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int, + unsigned int *, unsigned int *); }; struct smb_version_values { @@ -642,6 +645,16 @@ add_credits(struct TCP_Server_Info *server, const unsigned int add, } static inline void +add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add, + const int optype) +{ + if (add) { + server->ops->add_credits(server, add, optype); + wake_up(&server->request_q); + } +} + +static inline void set_credits(struct TCP_Server_Info *server, const int val) { server->ops->set_credits(server, val); @@ -1075,6 +1088,7 @@ struct cifs_writedata { int result; unsigned int pagesz; unsigned int tailsz; + unsigned int credits; unsigned int nr_pages; struct page *pages[]; }; @@ -1400,6 +1414,7 @@ static inline void free_dfs_info_array(struct dfs_info3_param *param, #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ #define CIFS_NEG_OP 0x0200 /* negotiate request */ #define CIFS_OP_MASK 0x0380 /* mask request type */ +#define CIFS_HAS_CREDITS 0x0400 /* already has credits */ /* Security Flags: indicate type of session setup needed */ #define CIFSSEC_MAY_SIGN 0x00001 |