diff options
author | Pavel Shilovsky <pshilovsky@samba.org> | 2013-07-04 18:41:09 +0400 |
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committer | Steve French <smfrench@gmail.com> | 2013-07-10 13:08:39 -0500 |
commit | 63eb3def3267a5744863801e8221898b0ba9d41d (patch) | |
tree | 7ebc846f2e66303d0b7228ae9cedf498d9bc1999 /fs/cifs/smb2pdu.c | |
parent | d22cbfecbd9047465d9067a6eedc43434c888593 (diff) | |
download | linux-63eb3def3267a5744863801e8221898b0ba9d41d.tar.bz2 |
CIFS: Request durable open for SMB2 opens
by passing durable context together with a handle caching lease or
batch oplock.
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steven French <steven@steven-GA-970A-DS3.(none)>
Diffstat (limited to 'fs/cifs/smb2pdu.c')
-rw-r--r-- | fs/cifs/smb2pdu.c | 62 |
1 files changed, 61 insertions, 1 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index e65ccdb528cf..140a613073fb 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -847,6 +847,28 @@ create_lease_buf(u8 *lease_key, u8 oplock) return buf; } +static struct create_durable * +create_durable_buf(void) +{ + struct create_durable *buf; + + buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); + if (!buf) + return NULL; + + buf->ccontext.DataOffset = cpu_to_le16(offsetof + (struct create_durable, Reserved)); + buf->ccontext.DataLength = cpu_to_le32(16); + buf->ccontext.NameOffset = cpu_to_le16(offsetof + (struct create_durable, Name)); + buf->ccontext.NameLength = cpu_to_le16(4); + buf->Name[0] = 'D'; + buf->Name[1] = 'H'; + buf->Name[2] = 'n'; + buf->Name[3] = 'Q'; + return buf; +} + static __u8 parse_lease_state(struct smb2_create_rsp *rsp) { @@ -901,6 +923,28 @@ add_lease_context(struct kvec *iov, unsigned int *num_iovec, __u8 *oplock) return 0; } +static int +add_durable_context(struct kvec *iov, unsigned int *num_iovec) +{ + struct smb2_create_req *req = iov[0].iov_base; + unsigned int num = *num_iovec; + + iov[num].iov_base = create_durable_buf(); + if (iov[num].iov_base == NULL) + return -ENOMEM; + iov[num].iov_len = sizeof(struct create_durable); + if (!req->CreateContextsOffset) + req->CreateContextsOffset = + cpu_to_le32(sizeof(struct smb2_create_req) - 4 + + iov[1].iov_len); + req->CreateContextsLength = + cpu_to_le32(le32_to_cpu(req->CreateContextsLength) + + sizeof(struct create_durable)); + inc_rfc1001_len(&req->hdr, sizeof(struct create_durable)); + *num_iovec = num + 1; + return 0; +} + int SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, @@ -911,7 +955,7 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, struct smb2_create_rsp *rsp; struct TCP_Server_Info *server; struct cifs_ses *ses = tcon->ses; - struct kvec iov[3]; + struct kvec iov[4]; int resp_buftype; int uni_path_len; __le16 *copy_path = NULL; @@ -987,6 +1031,22 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, } } + if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { + /* need to set Next field of lease context if we request it */ + if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) { + struct create_context *ccontext = + (struct create_context *)iov[num_iovecs-1].iov_base; + ccontext->Next = sizeof(struct create_lease); + } + rc = add_durable_context(iov, &num_iovecs); + if (rc) { + cifs_small_buf_release(req); + kfree(copy_path); + kfree(iov[num_iovecs-1].iov_base); + return rc; + } + } + rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); rsp = (struct smb2_create_rsp *)iov[0].iov_base; |