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cifs: prepare SMB2_query_directory to be used with compounding 

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2020-01-08 13:08:04 +10:00 committed by Steve French
parent 01d1bd76a1
commit 0a17799cc0
3 changed files with 83 additions and 37 deletions
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113
fs/cifs/smb2pdu.c
View File

@ -4296,56 +4296,38 @@ num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
/*
* Readdir/FindFirst
*/
int
SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, int index,
struct cifs_search_info *srch_inf)
int SMB2_query_directory_init(const unsigned int xid,
struct cifs_tcon *tcon, struct smb_rqst *rqst,
u64 persistent_fid, u64 volatile_fid,
int index, int info_level)
{
struct smb_rqst rqst;
struct TCP_Server_Info *server = tcon->ses->server;
struct smb2_query_directory_req *req;
struct smb2_query_directory_rsp *rsp = NULL;
struct kvec iov[2];
struct kvec rsp_iov;
int rc = 0;
int len;
int resp_buftype = CIFS_NO_BUFFER;
unsigned char *bufptr;
struct TCP_Server_Info *server;
struct cifs_ses *ses = tcon->ses;
__le16 asteriks = cpu_to_le16('*');
char *end_of_smb;
unsigned int output_size = CIFSMaxBufSize;
size_t info_buf_size;
int flags = 0;
unsigned int output_size = CIFSMaxBufSize -
MAX_SMB2_CREATE_RESPONSE_SIZE -
MAX_SMB2_CLOSE_RESPONSE_SIZE;
unsigned int total_len;
if (ses && (ses->server))
server = ses->server;
else
return -EIO;
struct kvec *iov = rqst->rq_iov;
int len, rc;
rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
&total_len);
if (rc)
return rc;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
switch (srch_inf->info_level) {
switch (info_level) {
case SMB_FIND_FILE_DIRECTORY_INFO:
req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
break;
case SMB_FIND_FILE_ID_FULL_DIR_INFO:
req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
break;
default:
cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
srch_inf->info_level);
rc = -EINVAL;
goto qdir_exit;
info_level);
return -EINVAL;
}
req->FileIndex = cpu_to_le32(index);
@ -4374,15 +4356,56 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
iov[1].iov_base = (char *)(req->Buffer);
iov[1].iov_len = len;
memset(&rqst, 0, sizeof(struct smb_rqst));
rqst.rq_iov = iov;
rqst.rq_nvec = 2;
trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
tcon->ses->Suid, index, output_size);
return 0;
}
void SMB2_query_directory_free(struct smb_rqst *rqst)
{
if (rqst && rqst->rq_iov) {
cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
}
}
int
SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, int index,
struct cifs_search_info *srch_inf)
{
struct smb_rqst rqst;
struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
struct smb2_query_directory_rsp *rsp = NULL;
int resp_buftype = CIFS_NO_BUFFER;
struct kvec rsp_iov;
int rc = 0;
struct TCP_Server_Info *server;
struct cifs_ses *ses = tcon->ses;
char *end_of_smb;
size_t info_buf_size;
int flags = 0;
if (ses && (ses->server))
server = ses->server;
else
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 = SMB2_QUERY_DIRECTORY_IOV_SIZE;
rc = SMB2_query_directory_init(xid, tcon, &rqst, persistent_fid,
volatile_fid, index,
srch_inf->info_level);
if (rc)
goto qdir_exit;
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
cifs_small_buf_release(req);
rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
if (rc) {
@ -4400,6 +4423,20 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
goto qdir_exit;
}
switch (srch_inf->info_level) {
case SMB_FIND_FILE_DIRECTORY_INFO:
info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
break;
case SMB_FIND_FILE_ID_FULL_DIR_INFO:
info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
break;
default:
cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
srch_inf->info_level);
rc = -EINVAL;
goto qdir_exit;
}
rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
info_buf_size);
@ -4435,11 +4472,13 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
else
cifs_tcon_dbg(VFS, "illegal search buffer type\n");
resp_buftype = CIFS_NO_BUFFER;
trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
tcon->ses->Suid, index, srch_inf->entries_in_buffer);
return rc;
qdir_exit:
SMB2_query_directory_free(&rqst);
free_rsp_buf(resp_buftype, rsp);
return rc;
}

2
fs/cifs/smb2pdu.h
View File

@ -1282,6 +1282,8 @@ struct smb2_echo_rsp {
#define SMB2_INDEX_SPECIFIED 0x04
#define SMB2_REOPEN 0x10
#define SMB2_QUERY_DIRECTORY_IOV_SIZE 2
struct smb2_query_directory_req {
struct smb2_sync_hdr sync_hdr;
__le16 StructureSize; /* Must be 33 */

5
fs/cifs/smb2proto.h
View File

@ -197,6 +197,11 @@ extern int SMB2_echo(struct TCP_Server_Info *server);
extern int SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, int index,
struct cifs_search_info *srch_inf);
extern int SMB2_query_directory_init(unsigned int xid, struct cifs_tcon *tcon,
struct smb_rqst *rqst,
u64 persistent_fid, u64 volatile_fid,
int index, int info_level);
extern void SMB2_query_directory_free(struct smb_rqst *rqst);
extern int SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, u32 pid,
__le64 *eof);