diff options
| -rw-r--r-- | fs/cifs/smb2file.c | 2 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.c | 62 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.h | 6 |
3 files changed, 68 insertions, 2 deletions
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c index 46a4299b7ae8..150a9b1bc7fa 100644 --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -81,7 +81,7 @@ smb2_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path, } desired_access |= FILE_READ_ATTRIBUTES; - *smb2_oplock = SMB2_OPLOCK_LEVEL_EXCLUSIVE; + *smb2_oplock = SMB2_OPLOCK_LEVEL_BATCH; if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) memcpy(smb2_oplock + 1, fid->lease_key, SMB2_LEASE_KEY_SIZE); 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; diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 8b1025f6f0da..3e30f0ad5749 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -485,6 +485,12 @@ struct create_lease { struct lease_context lcontext; } __packed; +struct create_durable { + struct create_context ccontext; + __u8 Name[8]; + __u8 Reserved[16]; +} __packed; + /* this goes in the ioctl buffer when doing a copychunk request */ struct copychunk_ioctl { char SourceKey[24]; |