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cifs: prepare SMB2_Flush to be usable in compounds 

Create smb2_flush_init() and smb2_flush_free() so we can use the flush command
in compounds.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2019-07-16 15:07:08 +10:00 committed by Steve French
parent 22442179a5
commit 86e14e1205
2 changed files with 45 additions and 19 deletions
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60
fs/cifs/smb2pdu.c
View File

@ -3287,44 +3287,64 @@ SMB2_echo(struct TCP_Server_Info *server)
return rc;
}
int
SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
u64 volatile_fid)
void
SMB2_flush_free(struct smb_rqst *rqst)
{
if (rqst && rqst->rq_iov)
cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
}
int
SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst,
struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid)
{
struct smb_rqst rqst;
struct smb2_flush_req *req;
struct cifs_ses *ses = tcon->ses;
struct kvec iov[1];
struct kvec rsp_iov;
int resp_buftype;
int rc = 0;
int flags = 0;
struct kvec *iov = rqst->rq_iov;
unsigned int total_len;
cifs_dbg(FYI, "Flush\n");
if (!ses || !(ses->server))
return -EIO;
int rc;
rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
if (rc)
return rc;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
req->PersistentFileId = persistent_fid;
req->VolatileFileId = volatile_fid;
iov[0].iov_base = (char *)req;
iov[0].iov_len = total_len;
return 0;
}
int
SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
u64 volatile_fid)
{
struct cifs_ses *ses = tcon->ses;
struct smb_rqst rqst;
struct kvec iov[1];
struct kvec rsp_iov = {NULL, 0};
int resp_buftype = CIFS_NO_BUFFER;
int flags = 0;
int rc = 0;
cifs_dbg(FYI, "flush\n");
if (!ses || !(ses->server))
return -EIO;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
memset(&rqst, 0, sizeof(struct smb_rqst));
memset(&iov, 0, sizeof(iov));
rqst.rq_iov = iov;
rqst.rq_nvec = 1;
rc = SMB2_flush_init(xid, &rqst, tcon, persistent_fid, volatile_fid);
if (rc)
goto flush_exit;
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
cifs_small_buf_release(req);
if (rc != 0) {
cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
@ -3332,6 +3352,8 @@ SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
rc);
}
flush_exit:
SMB2_flush_free(&rqst);
free_rsp_buf(resp_buftype, rsp_iov.iov_base);
return rc;
}

4
fs/cifs/smb2proto.h
View File

@ -158,6 +158,10 @@ extern int SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
extern void SMB2_close_free(struct smb_rqst *rqst);
extern int SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_file_id, u64 volatile_file_id);
extern int SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst,
struct cifs_tcon *tcon,
u64 persistent_file_id, u64 volatile_file_id);
extern void SMB2_flush_free(struct smb_rqst *rqst);
extern int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_file_id, u64 volatile_file_id,
struct smb2_file_all_info *data);