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authorPavel Shilovsky <pshilovsky@samba.org>2012-09-18 16:20:30 -0700
committerSteve French <smfrench@gmail.com>2012-09-24 21:46:28 -0500
commit009d344398bb3e844b31eb9e6a7860748c6f6dd3 (patch)
treeaa999b974fd42753976be22c2596d1f1fcf83511 /fs/cifs
parentba9ad7257ae50b8aa72a3f44da839830e065363c (diff)
downloadop-kernel-dev-009d344398bb3e844b31eb9e6a7860748c6f6dd3.zip
op-kernel-dev-009d344398bb3e844b31eb9e6a7860748c6f6dd3.tar.gz
CIFS: Add writepage support for SMB2
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/smb2ops.c12
-rw-r--r--fs/cifs/smb2pdu.c61
-rw-r--r--fs/cifs/smb2proto.h2
3 files changed, 75 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index fb289d2..f9c3dbe 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -404,6 +404,17 @@ smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
return SMB2_read(xid, parms, bytes_read, buf, buf_type);
}
+static int
+smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
+ struct cifs_io_parms *parms, unsigned int *written,
+ struct kvec *iov, unsigned long nr_segs)
+{
+
+ parms->persistent_fid = cfile->fid.persistent_fid;
+ parms->volatile_fid = cfile->fid.volatile_fid;
+ return SMB2_write(xid, parms, written, iov, nr_segs);
+}
+
struct smb_version_operations smb21_operations = {
.setup_request = smb2_setup_request,
.setup_async_request = smb2_setup_async_request,
@@ -447,6 +458,7 @@ struct smb_version_operations smb21_operations = {
.async_readv = smb2_async_readv,
.async_writev = smb2_async_writev,
.sync_read = smb2_sync_read,
+ .sync_write = smb2_sync_write,
};
struct smb_version_values smb21_values = {
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 23c5693..00dc45a 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1501,3 +1501,64 @@ async_writev_out:
kfree(iov);
return rc;
}
+
+/*
+ * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
+ * The length field from io_parms must be at least 1 and indicates a number of
+ * elements with data to write that begins with position 1 in iov array. All
+ * data length is specified by count.
+ */
+int
+SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
+ unsigned int *nbytes, struct kvec *iov, int n_vec)
+{
+ int rc = 0;
+ struct smb2_write_req *req = NULL;
+ struct smb2_write_rsp *rsp = NULL;
+ int resp_buftype;
+ *nbytes = 0;
+
+ if (n_vec < 1)
+ return rc;
+
+ rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (io_parms->tcon->ses->server == NULL)
+ return -ECONNABORTED;
+
+ req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
+
+ req->PersistentFileId = io_parms->persistent_fid;
+ req->VolatileFileId = io_parms->volatile_fid;
+ req->WriteChannelInfoOffset = 0;
+ req->WriteChannelInfoLength = 0;
+ req->Channel = 0;
+ req->Length = cpu_to_le32(io_parms->length);
+ req->Offset = cpu_to_le64(io_parms->offset);
+ /* 4 for rfc1002 length field */
+ req->DataOffset = cpu_to_le16(
+ offsetof(struct smb2_write_req, Buffer) - 4);
+ req->RemainingBytes = 0;
+
+ iov[0].iov_base = (char *)req;
+ /* 4 for rfc1002 length field and 1 for Buffer */
+ iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
+
+ /* length of entire message including data to be written */
+ inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
+
+ rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
+ &resp_buftype, 0);
+
+ if (rc) {
+ cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
+ cERROR(1, "Send error in write = %d", rc);
+ } else {
+ rsp = (struct smb2_write_rsp *)iov[0].iov_base;
+ *nbytes = le32_to_cpu(rsp->DataLength);
+ free_rsp_buf(resp_buftype, rsp);
+ }
+ return rc;
+}
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 97e62f3..192d0c7 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -101,6 +101,8 @@ extern int smb2_async_readv(struct cifs_readdata *rdata);
extern int SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
unsigned int *nbytes, char **buf, int *buf_type);
extern int smb2_async_writev(struct cifs_writedata *wdata);
+extern int SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
+ unsigned int *nbytes, struct kvec *iov, int n_vec);
extern int SMB2_echo(struct TCP_Server_Info *server);
#endif /* _SMB2PROTO_H */
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