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smbd: add dos_mode_at_send/recv()

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Signed-off-by: Ralph Boehme <slow@samba.org>
This commit is contained in:
Ralph Boehme 2018-03-15 15:21:53 +01:00
parent 0feef1684e
commit 0fbeac0356
2 changed files with 142 additions and 0 deletions
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137
source3/smbd/dosmode.c
View File

@ -25,6 +25,7 @@
#include "../libcli/security/security.h"
#include "smbd/smbd.h"
#include "lib/param/loadparm.h"
#include "lib/util/tevent_ntstatus.h"
static NTSTATUS get_file_handle_for_metadata(connection_struct *conn,
const struct smb_filename *smb_fname,
@ -750,6 +751,142 @@ uint32_t dos_mode(connection_struct *conn, struct smb_filename *smb_fname)
return result;
}
struct dos_mode_at_state {
files_struct *dir_fsp;
struct smb_filename *smb_fname;
uint32_t dosmode;
};
static void dos_mode_at_vfs_get_dosmode_done(struct tevent_req *subreq);
struct tevent_req *dos_mode_at_send(TALLOC_CTX *mem_ctx,
struct smb_vfs_ev_glue *evg,
files_struct *dir_fsp,
struct smb_filename *smb_fname)
{
struct tevent_context *ev = smb_vfs_ev_glue_ev_ctx(evg);
struct tevent_req *req = NULL;
struct dos_mode_at_state *state = NULL;
struct tevent_req *subreq = NULL;
DBG_DEBUG("%s\n", smb_fname_str_dbg(smb_fname));
req = tevent_req_create(mem_ctx, &state,
struct dos_mode_at_state);
if (req == NULL) {
return NULL;
}
*state = (struct dos_mode_at_state) {
.dir_fsp = dir_fsp,
.smb_fname = smb_fname,
};
if (!VALID_STAT(smb_fname->st)) {
tevent_req_done(req);
return tevent_req_post(req, ev);
}
subreq = SMB_VFS_GET_DOS_ATTRIBUTES_SEND(state,
evg,
dir_fsp,
smb_fname);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, dos_mode_at_vfs_get_dosmode_done, req);
return req;
}
static void dos_mode_at_vfs_get_dosmode_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct dos_mode_at_state *state =
tevent_req_data(req,
struct dos_mode_at_state);
char *path = NULL;
struct smb_filename *smb_path = NULL;
struct vfs_aio_state aio_state;
NTSTATUS status;
status = SMB_VFS_GET_DOS_ATTRIBUTES_RECV(subreq,
&aio_state,
&state->dosmode);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
/*
* Both the sync dos_mode() as well as the async
* dos_mode_at_[send|recv] have no real error return, the only
* unhandled error is when the stat info in smb_fname is not
* valid (cf the checks in dos_mode() and dos_mode_at_send().
*
* If SMB_VFS_GET_DOS_ATTRIBUTES[_SEND|_RECV] fails we must call
* dos_mode_post() which also does the mapping of a last ressort
* from S_IFMT(st_mode).
*
* Only if we get NT_STATUS_NOT_IMPLEMENTED from a stacked VFS
* module we must fallback to sync processing.
*/
if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)) {
/*
* state->dosmode should still be 0, but reset
* it to be sure.
*/
state->dosmode = 0;
status = NT_STATUS_OK;
}
}
if (NT_STATUS_IS_OK(status)) {
state->dosmode = dos_mode_post(state->dosmode,
state->dir_fsp->conn,
state->smb_fname,
__func__);
tevent_req_done(req);
return;
}
/*
* Fall back to sync dos_mode() if we got NOT_IMPLEMENTED.
*/
path = talloc_asprintf(state,
"%s/%s",
state->dir_fsp->fsp_name->base_name,
state->smb_fname->base_name);
if (tevent_req_nomem(path, req)) {
return;
}
smb_path = synthetic_smb_fname(state, path, NULL, NULL, 0);
if (tevent_req_nomem(path, req)) {
return;
}
state->dosmode = dos_mode(state->dir_fsp->conn, smb_path);
tevent_req_done(req);
return;
}
NTSTATUS dos_mode_at_recv(struct tevent_req *req, uint32_t *dosmode)
{
struct dos_mode_at_state *state =
tevent_req_data(req,
struct dos_mode_at_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*dosmode = state->dosmode;
tevent_req_received(req);
return NT_STATUS_OK;
}
/*******************************************************************
chmod a file - but preserve some bits.
If "store dos attributes" is also set it will store the create time

5
source3/smbd/proto.h
View File

@ -260,6 +260,11 @@ mode_t unix_mode(connection_struct *conn, int dosmode,
uint32_t dos_mode_msdfs(connection_struct *conn,
const struct smb_filename *smb_fname);
uint32_t dos_mode(connection_struct *conn, struct smb_filename *smb_fname);
struct tevent_req *dos_mode_at_send(TALLOC_CTX *mem_ctx,
struct smb_vfs_ev_glue *evg,
files_struct *dir_fsp,
struct smb_filename *smb_fname);
NTSTATUS dos_mode_at_recv(struct tevent_req *req, uint32_t *dosmode);
int file_set_dosmode(connection_struct *conn, struct smb_filename *smb_fname,
uint32_t dosmode, const char *parent_dir, bool newfile);
NTSTATUS file_set_sparse(connection_struct *conn,