diff options
| author | Pavel Shilovsky <pshilovsky@samba.org> | 2012-09-18 16:20:28 -0700 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2012-09-24 21:46:27 -0500 |
| commit | 3a3bab509f3f0e7295caab24e9102ce303edb50b (patch) | |
| tree | 59e98615b6323c0b51c52e604fb8812387737a2a /fs/cifs/smb2ops.c | |
| parent | 24985c53d5b04a56ac7c8ae7f74b8cb807e2ed2f (diff) | |
CIFS: Add SMB2 r/wsize negotiating
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/smb2ops.c')
| -rw-r--r-- | fs/cifs/smb2ops.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index d81e1daeb8f0..20afb756e97a 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -17,6 +17,7 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include <linux/pagemap.h> #include "cifsglob.h" #include "smb2pdu.h" #include "smb2proto.h" @@ -157,6 +158,48 @@ smb2_negotiate(const unsigned int xid, struct cifs_ses *ses) return rc; } +static unsigned int +smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) +{ + struct TCP_Server_Info *server = tcon->ses->server; + unsigned int wsize; + + /* 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); + /* + * limit write size to 2 ** 16, because we don't support multicredit + * requests now. + */ + wsize = min_t(unsigned int, wsize, 2 << 15); + + /* limit to the amount that we can kmap at once */ + wsize = min_t(unsigned int, wsize, CIFS_KMAP_SIZE_LIMIT); + + return wsize; +} + +static unsigned int +smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) +{ + struct TCP_Server_Info *server = tcon->ses->server; + unsigned int rsize; + + /* 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); + /* + * limit write size to 2 ** 16, because we don't support multicredit + * requests now. + */ + rsize = min_t(unsigned int, rsize, 2 << 15); + + /* limit to the amount that we can kmap at once */ + rsize = min_t(unsigned int, rsize, CIFS_KMAP_SIZE_LIMIT); + + return rsize; +} + static int smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path) @@ -352,6 +395,8 @@ struct smb_version_operations smb21_operations = { .print_stats = smb2_print_stats, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, + .negotiate_wsize = smb2_negotiate_wsize, + .negotiate_rsize = smb2_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, |