struct security_descriptor *sd = NULL;
uint32_t rejected_share_access;
uint32_t rejected_mask = access_mask;
+ uint32_t do_not_check_mask = 0;
rejected_share_access = access_mask & ~(conn->share_access);
* se_file_access_check() also takes care of
* owner WRITE_DAC and READ_CONTROL.
*/
+ do_not_check_mask = FILE_READ_ATTRIBUTES;
+
+ /*
+ * Samba 3.6 and earlier granted execute access even
+ * if the ACL did not contain execute rights.
+ * Samba 4.0 is more correct and checks it.
+ * The compatibilty mode allows to skip this check
+ * to smoothen upgrades.
+ */
+ if (lp_acl_allow_execute_always(SNUM(conn))) {
+ do_not_check_mask |= FILE_EXECUTE;
+ }
+
status = se_file_access_check(sd,
get_current_nttok(conn),
use_privs,
- (access_mask & ~FILE_READ_ATTRIBUTES),
+ (access_mask & ~do_not_check_mask),
&rejected_mask);
DEBUG(10,("smbd_check_access_rights: file %s requesting "
"share entry with an open file\n");
}
- if ((share_entry->op_type == NO_OPLOCK) &&
- (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK))
- {
- /* Someone has already written to it, but I haven't yet
- * noticed */
- return;
- }
-
if (((uint16)fsp->oplock_type) != share_entry->op_type) {
goto panic;
}
((access_mask & ~stat_open_bits) == 0));
}
+static bool has_delete_on_close(struct share_mode_lock *lck,
+ uint32_t name_hash)
+{
+ struct share_mode_data *d = lck->data;
+ uint32_t i;
+
+ if (d->num_share_modes == 0) {
+ return false;
+ }
+ if (!is_delete_on_close_set(lck, name_hash)) {
+ return false;
+ }
+ for (i=0; i<d->num_share_modes; i++) {
+ if (!share_mode_stale_pid(d, i)) {
+ return true;
+ }
+ }
+ return false;
+}
+
/****************************************************************************
Deal with share modes
Invarient: Share mode must be locked on entry and exit.
static NTSTATUS open_mode_check(connection_struct *conn,
struct share_mode_lock *lck,
- uint32_t name_hash,
uint32 access_mask,
uint32 share_access,
- uint32 create_options,
bool *file_existed)
{
int i;
return NT_STATUS_OK;
}
- /* A delete on close prohibits everything */
-
- if (is_delete_on_close_set(lck, name_hash)) {
- /*
- * Check the delete on close token
- * is valid. It could have been left
- * after a server crash.
- */
- for(i = 0; i < lck->data->num_share_modes; i++) {
- if (!share_mode_stale_pid(lck->data, i)) {
-
- *file_existed = true;
-
- return NT_STATUS_DELETE_PENDING;
- }
- }
- return NT_STATUS_OK;
- }
-
if (is_stat_open(access_mask)) {
/* Stat open that doesn't trigger oplock breaks or share mode
* checks... ! JRA. */
status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
MSG_SMB_BREAK_REQUEST,
- (uint8 *)msg,
- MSG_SMB_SHARE_MODE_ENTRY_SIZE);
+ (uint8 *)msg, sizeof(msg));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("Could not send oplock break message: %s\n",
nt_errstr(status)));
bool *got_level2,
bool *got_no_oplock)
{
- int i;
+ struct share_mode_data *d = lck->data;
+ uint32_t i;
*pp_batch = NULL;
*pp_ex_or_batch = NULL;
return;
}
- for (i=0; i<lck->data->num_share_modes; i++) {
- struct share_mode_entry *e = &lck->data->share_modes[i];
+ for (i=0; i<d->num_share_modes; i++) {
+ struct share_mode_entry *e = &d->share_modes[i];
if (!is_valid_share_mode_entry(e)) {
continue;
if (BATCH_OPLOCK_TYPE(e->op_type)) {
/* batch - can only be one. */
- if (share_mode_stale_pid(lck->data, i)) {
+ if (share_mode_stale_pid(d, i)) {
DEBUG(10, ("Found stale batch oplock\n"));
continue;
}
}
if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
- if (share_mode_stale_pid(lck->data, i)) {
+ if (share_mode_stale_pid(d, i)) {
DEBUG(10, ("Found stale duplicate oplock\n"));
continue;
}
if (LEVEL_II_OPLOCK_TYPE(e->op_type)) {
if (*pp_batch || *pp_ex_or_batch) {
- if (share_mode_stale_pid(lck->data, i)) {
+ if (share_mode_stale_pid(d, i)) {
DEBUG(10, ("Found stale LevelII "
"oplock\n"));
continue;
if (e->op_type == NO_OPLOCK) {
if (*pp_batch || *pp_ex_or_batch) {
- if (share_mode_stale_pid(lck->data, i)) {
+ if (share_mode_stale_pid(d, i)) {
DEBUG(10, ("Found stale NO_OPLOCK "
"entry\n"));
continue;
}
}
-static bool delay_for_batch_oplocks(files_struct *fsp,
- uint64_t mid,
- int oplock_request,
- struct share_mode_entry *batch_entry)
+static bool delay_for_oplock(files_struct *fsp,
+ uint64_t mid,
+ int oplock_request,
+ struct share_mode_entry *entry)
{
if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
return false;
}
- if (batch_entry == NULL) {
+ if (entry == NULL) {
return false;
}
- if (server_id_is_disconnected(&batch_entry->pid)) {
+ if (server_id_is_disconnected(&entry->pid)) {
/*
* TODO: clean up.
* This could be achieved by sending a break message
return false;
}
- /* Found a batch oplock */
- send_break_message(fsp, batch_entry, mid, oplock_request);
- return true;
-}
-
-static bool delay_for_exclusive_oplocks(files_struct *fsp,
- uint64_t mid,
- int oplock_request,
- struct share_mode_entry *ex_entry)
-{
- if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
- return false;
- }
- if (ex_entry == NULL) {
- return false;
- }
-
- if (server_id_is_disconnected(&ex_entry->pid)) {
- /*
- * since only durable handles can get disconnected,
- * and we can only get durable handles with batch oplocks,
- * this should actually never be reached...
- */
- return false;
- }
-
- send_break_message(fsp, ex_entry, mid, oplock_request);
+ send_break_message(fsp, entry, mid, oplock_request);
return true;
}
if (!br_lck)
return false;
- return (br_lck->num_locks > 0);
+ return (brl_num_locks(br_lck) > 0);
}
static void grant_fsp_oplock_type(files_struct *fsp,
* what was found in the existing share modes.
*/
- if (got_a_none_oplock) {
- fsp->oplock_type = NO_OPLOCK;
- } else if (got_level2_oplock) {
- if (fsp->oplock_type == NO_OPLOCK ||
- fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
- /* Store a level2 oplock, but don't tell the client */
- fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
- } else {
+ if (got_level2_oplock || got_a_none_oplock) {
+ if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
fsp->oplock_type = LEVEL_II_OPLOCK;
}
- } else {
- /* All share_mode_entries are placeholders or deferred.
- * Silently upgrade to fake levelII if the client didn't
- * ask for an oplock. */
- if (fsp->oplock_type == NO_OPLOCK) {
- /* Store a level2 oplock, but don't tell the client */
- fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
- }
}
/*
* or if we've turned them off.
*/
if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
- fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
+ fsp->oplock_type = NO_OPLOCK;
+ }
+
+ if (fsp->oplock_type == LEVEL_II_OPLOCK && !got_level2_oplock) {
+ /*
+ * We're the first level2 oplock. Indicate that in brlock.tdb.
+ */
+ struct byte_range_lock *brl;
+
+ brl = brl_get_locks(talloc_tos(), fsp);
+ if (brl != NULL) {
+ brl_set_have_read_oplocks(brl, true);
+ TALLOC_FREE(brl);
+ }
}
DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
find_oplock_types(fsp, 0, lck, &batch_entry, &exclusive_entry,
&got_level2_oplock, &got_a_none_oplock);
- if (delay_for_batch_oplocks(fsp, req->mid, 0, batch_entry) ||
- delay_for_exclusive_oplocks(fsp, req->mid, 0,
- exclusive_entry)) {
+ if (delay_for_oplock(fsp, req->mid, 0, batch_entry) ||
+ delay_for_oplock(fsp, req->mid, 0, exclusive_entry)) {
schedule_defer_open(lck, request_time, req);
TALLOC_FREE(lck);
DEBUG(10, ("Sent oplock break request to kernel "
&got_level2_oplock,
&got_a_none_oplock);
+ if (has_delete_on_close(lck, fsp->name_hash)) {
+ TALLOC_FREE(lck);
+ fd_close(fsp);
+ return NT_STATUS_DELETE_PENDING;
+ }
+
/* First pass - send break only on batch oplocks. */
if ((req != NULL) &&
- delay_for_batch_oplocks(fsp,
- req->mid,
- oplock_request,
- batch_entry)) {
+ delay_for_oplock(fsp, req->mid, oplock_request,
+ batch_entry)) {
schedule_defer_open(lck, request_time, req);
TALLOC_FREE(lck);
fd_close(fsp);
return NT_STATUS_SHARING_VIOLATION;
}
- status = open_mode_check(conn, lck, fsp->name_hash,
+ status = open_mode_check(conn, lck,
access_mask, share_access,
- create_options, &file_existed);
+ &file_existed);
if (NT_STATUS_IS_OK(status)) {
/* We might be going to allow this open. Check oplock
/* Second pass - send break for both batch or
* exclusive oplocks. */
if ((req != NULL) &&
- delay_for_exclusive_oplocks(
- fsp,
- req->mid,
- oplock_request,
- exclusive_entry)) {
+ delay_for_oplock(fsp, req->mid, oplock_request,
+ exclusive_entry)) {
schedule_defer_open(lck, request_time, req);
TALLOC_FREE(lck);
fd_close(fsp);
}
}
- if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
- /* DELETE_PENDING is not deferred for a second */
- TALLOC_FREE(lck);
- fd_close(fsp);
- return status;
- }
-
if (!NT_STATUS_IS_OK(status)) {
uint32 can_access_mask;
bool can_access = True;
status = set_file_oplock(fsp, fsp->oplock_type);
if (!NT_STATUS_IS_OK(status)) {
/*
- * Could not get the kernel oplock or there are byte-range
- * locks on the file.
+ * Could not get the kernel oplock
*/
fsp->oplock_type = NO_OPLOCK;
}
- set_share_mode(lck, fsp, get_current_uid(conn),
- req ? req->mid : 0,
- fsp->oplock_type);
+ if (!set_share_mode(lck, fsp, get_current_uid(conn),
+ req ? req->mid : 0,
+ fsp->oplock_type)) {
+ TALLOC_FREE(lck);
+ fd_close(fsp);
+ return NT_STATUS_NO_MEMORY;
+ }
/* Handle strange delete on close create semantics. */
if (create_options & FILE_DELETE_ON_CLOSE) {
return NT_STATUS_SHARING_VIOLATION;
}
- status = open_mode_check(conn, lck, fsp->name_hash,
+ if (has_delete_on_close(lck, fsp->name_hash)) {
+ TALLOC_FREE(lck);
+ fd_close(fsp);
+ file_free(req, fsp);
+ return NT_STATUS_DELETE_PENDING;
+ }
+
+ status = open_mode_check(conn, lck,
access_mask, share_access,
- create_options, &dir_existed);
+ &dir_existed);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(lck);
return status;
}
- set_share_mode(lck, fsp, get_current_uid(conn),
- req ? req->mid : 0, NO_OPLOCK);
+ if (!set_share_mode(lck, fsp, get_current_uid(conn),
+ req ? req->mid : 0, NO_OPLOCK)) {
+ TALLOC_FREE(lck);
+ fd_close(fsp);
+ file_free(req, fsp);
+ return NT_STATUS_NO_MEMORY;
+ }
/* For directories the delete on close bit at open time seems
always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
if (create_options & FILE_DELETE_ON_CLOSE) {
status = can_set_delete_on_close(fsp, 0);
if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
+ del_share_mode(lck, fsp);
TALLOC_FREE(lck);
fd_close(fsp);
file_free(req, fsp);
git.samba.org / mat / samba.git / blobdiff