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cifs: add SMB2_query_info_[init|free]() 

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Paulo Alcantara <palcantara@suse.com>
This commit is contained in:
Ronnie Sahlberg 2018-08-01 09:26:17 +10:00 committed by Steve French
parent 8eb4ecfab0
commit 296ecbae7f
2 changed files with 51 additions and 22 deletions
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68
fs/cifs/smb2pdu.c
View File

@ -2580,36 +2580,22 @@ validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
return 0;
}
static int
query_info(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
u32 additional_info, size_t output_len, size_t min_len, void **data,
u32 *dlen)
int
SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
u64 persistent_fid, u64 volatile_fid,
u8 info_class, u8 info_type, u32 additional_info,
size_t output_len)
{
struct smb_rqst rqst;
struct smb2_query_info_req *req;
struct smb2_query_info_rsp *rsp = NULL;
struct kvec iov[2];
struct kvec rsp_iov;
int rc = 0;
int resp_buftype;
struct cifs_ses *ses = tcon->ses;
int flags = 0;
struct kvec *iov = rqst->rq_iov;
unsigned int total_len;
cifs_dbg(FYI, "Query Info\n");
if (!ses || !(ses->server))
return -EIO;
int rc;
rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
&total_len);
if (rc)
return rc;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
req->InfoType = info_type;
req->FileInfoClass = info_class;
req->PersistentFileId = persistent_fid;
@ -2626,13 +2612,50 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon,
iov[0].iov_base = (char *)req;
/* 1 for Buffer */
iov[0].iov_len = total_len - 1;
return 0;
}
void
SMB2_query_info_free(struct smb_rqst *rqst)
{
cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
}
static int
query_info(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
u32 additional_info, size_t output_len, size_t min_len, void **data,
u32 *dlen)
{
struct smb_rqst rqst;
struct smb2_query_info_rsp *rsp = NULL;
struct kvec iov[1];
struct kvec rsp_iov;
int rc = 0;
int resp_buftype;
struct cifs_ses *ses = tcon->ses;
int flags = 0;
cifs_dbg(FYI, "Query Info\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_query_info_init(tcon, &rqst, persistent_fid, volatile_fid,
info_class, info_type, additional_info,
output_len);
if (rc)
goto qinf_exit;
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
cifs_small_buf_release(req);
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
if (rc) {
@ -2661,6 +2684,7 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon,
&rsp_iov, min_len, *data);
qinf_exit:
SMB2_query_info_free(&rqst);
free_rsp_buf(resp_buftype, rsp);
return rc;
}

5
fs/cifs/smb2proto.h
View File

@ -153,6 +153,11 @@ extern int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
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);
extern int SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
u64 persistent_fid, u64 volatile_fid,
u8 info_class, u8 info_type,
u32 additional_info, size_t output_len);
extern void SMB2_query_info_free(struct smb_rqst *rqst);
extern int SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_file_id, u64 volatile_file_id,
void **data, unsigned int *plen);