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CIFS: Send as many mandatory unlock ranges at once as possible

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that reduces a traffic and increases a performance.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Pavel Shilovsky
2011-10-22 15:33:31 +04:00
committed by Steve French
parent 4f6bcec910
commit 9ee305b70e
3 changed files with 167 additions and 36 deletions
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40
fs/cifs/cifssmb.c
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@@ -2320,6 +2320,46 @@ CIFSSMBWrite2(const int xid, struct cifs_io_parms *io_parms,
return rc;
}
int cifs_lockv(const int xid, struct cifs_tcon *tcon, const __u16 netfid,
const __u8 lock_type, const __u32 num_unlock,
const __u32 num_lock, LOCKING_ANDX_RANGE *buf)
{
int rc = 0;
LOCK_REQ *pSMB = NULL;
struct kvec iov[2];
int resp_buf_type;
__u16 count;
cFYI(1, "cifs_lockv num lock %d num unlock %d", num_lock, num_unlock);
rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB);
if (rc)
return rc;
pSMB->Timeout = 0;
pSMB->NumberOfLocks = cpu_to_le16(num_lock);
pSMB->NumberOfUnlocks = cpu_to_le16(num_unlock);
pSMB->LockType = lock_type;
pSMB->AndXCommand = 0xFF; /* none */
pSMB->Fid = netfid; /* netfid stays le */
count = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
inc_rfc1001_len(pSMB, count);
pSMB->ByteCount = cpu_to_le16(count);
iov[0].iov_base = (char *)pSMB;
iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4 -
(num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
iov[1].iov_base = (char *)buf;
iov[1].iov_len = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
cifs_stats_inc(&tcon->num_locks);
rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
if (rc)
cFYI(1, "Send error in cifs_lockv = %d", rc);
return rc;
}
int
CIFSSMBLock(const int xid, struct cifs_tcon *tcon,