*/
#include "includes.h"
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "../librpc/gen_ndr/ndr_notify.h"
+#include "librpc/gen_ndr/ndr_file_id.h"
+
+struct notify_change_event {
+ struct timespec when;
+ uint32_t action;
+ const char *name;
+};
+
+struct notify_change_buf {
+ /*
+ * If no requests are pending, changes are queued here. Simple array,
+ * we only append.
+ */
+
+ /*
+ * num_changes == -1 means that we have got a catch-all change, when
+ * asked we just return NT_STATUS_OK without specific changes.
+ */
+ int num_changes;
+ struct notify_change_event *changes;
+
+ /*
+ * If no changes are around requests are queued here. Using a linked
+ * list, because we have to append at the end and delete from the top.
+ */
+ struct notify_change_request *requests;
+};
struct notify_change_request {
struct notify_change_request *prev, *next;
struct files_struct *fsp; /* backpointer for cancel by mid */
- uint8 request_buf[smb_size];
- uint32 filter;
- uint32 max_param;
+ struct smb_request *req;
+ uint32_t filter;
+ uint32_t max_param;
+ void (*reply_fn)(struct smb_request *req,
+ NTSTATUS error_code,
+ uint8_t *buf, size_t len);
struct notify_mid_map *mid_map;
void *backend_data;
};
-static void notify_fsp(files_struct *fsp, uint32 action, const char *name);
+static void notify_fsp(files_struct *fsp, struct timespec when,
+ uint32_t action, const char *name);
+
+bool change_notify_fsp_has_changes(struct files_struct *fsp)
+{
+ if (fsp == NULL) {
+ return false;
+ }
+
+ if (fsp->notify == NULL) {
+ return false;
+ }
-static struct notify_mid_map *notify_changes_by_mid;
+ if (fsp->notify->num_changes == 0) {
+ return false;
+ }
+
+ return true;
+}
/*
* For NTCancel, we need to find the notify_change_request indexed by
struct notify_mid_map {
struct notify_mid_map *prev, *next;
struct notify_change_request *req;
- uint16 mid;
+ uint64_t mid;
};
-static bool notify_change_record_identical(struct notify_change *c1,
- struct notify_change *c2)
+static bool notify_change_record_identical(struct notify_change_event *c1,
+ struct notify_change_event *c2)
{
/* Note this is deliberately case sensitive. */
if (c1->action == c2->action &&
return False;
}
+static int compare_notify_change_events(const void *p1, const void *p2)
+{
+ const struct notify_change_event *e1 = p1;
+ const struct notify_change_event *e2 = p2;
+
+ return timespec_compare(&e1->when, &e2->when);
+}
+
static bool notify_marshall_changes(int num_changes,
- uint32 max_offset,
- struct notify_change *changes,
- prs_struct *ps)
+ uint32_t max_offset,
+ struct notify_change_event *changes,
+ DATA_BLOB *final_blob)
{
int i;
- UNISTR uni_name;
- uni_name.buffer = NULL;
+ if (num_changes == -1) {
+ return false;
+ }
+
+ /*
+ * Sort the notifies by timestamp when the event happened to avoid
+ * coalescing and thus dropping events.
+ */
+
+ qsort(changes, num_changes,
+ sizeof(*changes), compare_notify_change_events);
for (i=0; i<num_changes; i++) {
- struct notify_change *c;
- size_t namelen;
- uint32 u32_tmp; /* Temp arg to prs_uint32 to avoid
- * signed/unsigned issues */
+ enum ndr_err_code ndr_err;
+ struct notify_change_event *c;
+ struct FILE_NOTIFY_INFORMATION m;
+ DATA_BLOB blob;
+ uint16_t pad = 0;
/* Coalesce any identical records. */
while (i+1 < num_changes &&
c = &changes[i];
- namelen = convert_string_allocate(
- NULL, CH_UNIX, CH_UTF16LE, c->name, strlen(c->name)+1,
- &uni_name.buffer, True);
- if ((namelen == -1) || (uni_name.buffer == NULL)) {
- goto fail;
- }
+ m.FileName1 = c->name;
+ m.FileNameLength = strlen_m(c->name)*2;
+ m.Action = c->action;
- namelen -= 2; /* Dump NULL termination */
+ m._pad = data_blob_null;
/*
* Offset to next entry, only if there is one
*/
- u32_tmp = (i == num_changes-1) ? 0 : namelen + 12;
- if (!prs_uint32("offset", ps, 1, &u32_tmp)) goto fail;
-
- u32_tmp = c->action;
- if (!prs_uint32("action", ps, 1, &u32_tmp)) goto fail;
+ if (i == (num_changes-1)) {
+ m.NextEntryOffset = 0;
+ } else {
+ if ((m.FileNameLength % 4) == 2) {
+ m._pad = data_blob_const(&pad, 2);
+ }
+ m.NextEntryOffset =
+ ndr_size_FILE_NOTIFY_INFORMATION(&m, 0);
+ }
- u32_tmp = namelen;
- if (!prs_uint32("namelen", ps, 1, &u32_tmp)) goto fail;
+ ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), &m,
+ (ndr_push_flags_fn_t)ndr_push_FILE_NOTIFY_INFORMATION);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return false;
+ }
- if (!prs_unistr("name", ps, 1, &uni_name)) goto fail;
+ if (DEBUGLEVEL >= 10) {
+ NDR_PRINT_DEBUG(FILE_NOTIFY_INFORMATION, &m);
+ }
- /*
- * Not NULL terminated, decrease by the 2 UCS2 \0 chars
- */
- prs_set_offset(ps, prs_offset(ps)-2);
+ if (!data_blob_append(talloc_tos(), final_blob,
+ blob.data, blob.length)) {
+ data_blob_free(&blob);
+ return false;
+ }
- SAFE_FREE(uni_name.buffer);
+ data_blob_free(&blob);
- if (prs_offset(ps) > max_offset) {
+ if (final_blob->length > max_offset) {
/* Too much data for client. */
+ DEBUG(10, ("Client only wanted %d bytes, trying to "
+ "marshall %d bytes\n", (int)max_offset,
+ (int)final_blob->length));
return False;
}
}
return True;
-
- fail:
- SAFE_FREE(uni_name.buffer);
- return False;
}
/****************************************************************************
Setup the common parts of the return packet and send it.
*****************************************************************************/
-static void change_notify_reply_packet(connection_struct *conn,
- const uint8 *request_buf,
- NTSTATUS error_code)
+void change_notify_reply(struct smb_request *req,
+ NTSTATUS error_code,
+ uint32_t max_param,
+ struct notify_change_buf *notify_buf,
+ void (*reply_fn)(struct smb_request *req,
+ NTSTATUS error_code,
+ uint8_t *buf, size_t len))
{
- char outbuf[smb_size+38];
+ DATA_BLOB blob = data_blob_null;
- memset(outbuf, '\0', sizeof(outbuf));
- construct_reply_common((char *)request_buf, outbuf);
-
- ERROR_NT(error_code);
-
- /*
- * Seems NT needs a transact command with an error code
- * in it. This is a longer packet than a simple error.
- */
- srv_set_message(outbuf,18,0,False);
-
- show_msg(outbuf);
- if (!srv_send_smb(smbd_server_fd(),
- outbuf,
- IS_CONN_ENCRYPTED(conn)))
- exit_server_cleanly("change_notify_reply_packet: srv_send_smb "
- "failed.");
-}
-
-void change_notify_reply(connection_struct *conn,
- const uint8 *request_buf, uint32 max_param,
- struct notify_change_buf *notify_buf)
-{
- prs_struct ps;
- struct smb_request *req = NULL;
- uint8 tmp_request[smb_size];
-
- if (notify_buf->num_changes == -1) {
- change_notify_reply_packet(conn, request_buf, NT_STATUS_OK);
- notify_buf->num_changes = 0;
+ if (!NT_STATUS_IS_OK(error_code)) {
+ reply_fn(req, error_code, NULL, 0);
return;
}
- prs_init(&ps, 0, NULL, MARSHALL);
+ if (max_param == 0 || notify_buf == NULL) {
+ reply_fn(req, NT_STATUS_OK, NULL, 0);
+ return;
+ }
if (!notify_marshall_changes(notify_buf->num_changes, max_param,
- notify_buf->changes, &ps)) {
+ notify_buf->changes, &blob)) {
/*
* We exceed what the client is willing to accept. Send
* nothing.
*/
- change_notify_reply_packet(conn, request_buf, NT_STATUS_OK);
- goto done;
- }
-
- if (!(req = talloc(talloc_tos(), struct smb_request))) {
- change_notify_reply_packet(conn, request_buf, NT_STATUS_NO_MEMORY);
- goto done;
+ data_blob_free(&blob);
}
- memcpy(tmp_request, request_buf, smb_size);
-
- /*
- * We're only interested in the header fields here
- */
-
- smb_setlen((char *)tmp_request, smb_size);
- SCVAL(tmp_request, smb_wct, 0);
+ reply_fn(req, NT_STATUS_OK, blob.data, blob.length);
- init_smb_request(req, tmp_request,0, conn->encrypted_tid);
-
- send_nt_replies(conn, req, NT_STATUS_OK, prs_data_p(&ps),
- prs_offset(&ps), NULL, 0);
-
- done:
- TALLOC_FREE(req);
- prs_mem_free(&ps);
+ data_blob_free(&blob);
TALLOC_FREE(notify_buf->changes);
notify_buf->num_changes = 0;
}
-static void notify_callback(void *private_data, const struct notify_event *e)
+static void notify_callback(void *private_data, struct timespec when,
+ const struct notify_event *e)
{
files_struct *fsp = (files_struct *)private_data;
- DEBUG(10, ("notify_callback called for %s\n", fsp->fsp_name));
- notify_fsp(fsp, e->action, e->path);
+ DEBUG(10, ("notify_callback called for %s\n", fsp_str_dbg(fsp)));
+ notify_fsp(fsp, when, e->action, e->path);
}
-NTSTATUS change_notify_create(struct files_struct *fsp, uint32 filter,
+NTSTATUS change_notify_create(struct files_struct *fsp, uint32_t filter,
bool recursive)
{
char *fullpath;
- struct notify_entry e;
- NTSTATUS status;
-
- SMB_ASSERT(fsp->notify == NULL);
+ size_t len;
+ uint32_t subdir_filter;
+ NTSTATUS status = NT_STATUS_NOT_IMPLEMENTED;
+
+ if (fsp->notify != NULL) {
+ DEBUG(1, ("change_notify_create: fsp->notify != NULL, "
+ "fname = %s\n", fsp->fsp_name->base_name));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
- if (!(fsp->notify = TALLOC_ZERO_P(NULL, struct notify_change_buf))) {
+ if (!(fsp->notify = talloc_zero(NULL, struct notify_change_buf))) {
DEBUG(0, ("talloc failed\n"));
return NT_STATUS_NO_MEMORY;
}
- if (asprintf(&fullpath, "%s/%s", fsp->conn->connectpath,
- fsp->fsp_name) == -1) {
- DEBUG(0, ("asprintf failed\n"));
+ /* Do notify operations on the base_name. */
+ fullpath = talloc_asprintf(
+ talloc_tos(), "%s/%s", fsp->conn->connectpath,
+ fsp->fsp_name->base_name);
+ if (fullpath == NULL) {
+ DEBUG(0, ("talloc_asprintf failed\n"));
+ TALLOC_FREE(fsp->notify);
return NT_STATUS_NO_MEMORY;
}
- ZERO_STRUCT(e);
- e.path = fullpath;
- e.filter = filter;
- e.subdir_filter = 0;
- if (recursive) {
- e.subdir_filter = filter;
+ /*
+ * Avoid /. at the end of the path name. notify can't deal with it.
+ */
+ len = strlen(fullpath);
+ if (len > 1 && fullpath[len-1] == '.' && fullpath[len-2] == '/') {
+ fullpath[len-2] = '\0';
}
- status = notify_add(fsp->conn->notify_ctx, &e, notify_callback, fsp);
- SAFE_FREE(fullpath);
+ subdir_filter = recursive ? filter : 0;
+ if ((filter != 0) || (subdir_filter != 0)) {
+ status = notify_add(fsp->conn->sconn->notify_ctx,
+ fullpath, filter, subdir_filter,
+ notify_callback, fsp);
+ }
+ TALLOC_FREE(fullpath);
return status;
}
-NTSTATUS change_notify_add_request(const struct smb_request *req,
- uint32 max_param,
- uint32 filter, bool recursive,
- struct files_struct *fsp)
+NTSTATUS change_notify_add_request(struct smb_request *req,
+ uint32_t max_param,
+ uint32_t filter, bool recursive,
+ struct files_struct *fsp,
+ void (*reply_fn)(struct smb_request *req,
+ NTSTATUS error_code,
+ uint8_t *buf, size_t len))
{
struct notify_change_request *request = NULL;
struct notify_mid_map *map = NULL;
+ struct smbd_server_connection *sconn = req->sconn;
+
+ DEBUG(10, ("change_notify_add_request: Adding request for %s: "
+ "max_param = %d\n", fsp_str_dbg(fsp), (int)max_param));
- if (!(request = SMB_MALLOC_P(struct notify_change_request))
- || !(map = SMB_MALLOC_P(struct notify_mid_map))) {
- SAFE_FREE(request);
+ if (!(request = talloc(NULL, struct notify_change_request))
+ || !(map = talloc(request, struct notify_mid_map))) {
+ TALLOC_FREE(request);
return NT_STATUS_NO_MEMORY;
}
request->mid_map = map;
map->req = request;
- memcpy(request->request_buf, req->inbuf, sizeof(request->request_buf));
+ request->req = talloc_move(request, &req);
request->max_param = max_param;
request->filter = filter;
request->fsp = fsp;
+ request->reply_fn = reply_fn;
request->backend_data = NULL;
- DLIST_ADD_END(fsp->notify->requests, request,
- struct notify_change_request *);
+ DLIST_ADD_END(fsp->notify->requests, request);
- map->mid = SVAL(req->inbuf, smb_mid);
- DLIST_ADD(notify_changes_by_mid, map);
-
- /* Push the MID of this packet on the signing queue. */
- srv_defer_sign_response(SVAL(req->inbuf,smb_mid));
+ map->mid = request->req->mid;
+ DLIST_ADD(sconn->smb1.notify_mid_maps, map);
return NT_STATUS_OK;
}
-static void change_notify_remove_request(struct notify_change_request *remove_req)
+static void change_notify_remove_request(struct smbd_server_connection *sconn,
+ struct notify_change_request *remove_req)
{
files_struct *fsp;
struct notify_change_request *req;
}
DLIST_REMOVE(fsp->notify->requests, req);
- DLIST_REMOVE(notify_changes_by_mid, req->mid_map);
- SAFE_FREE(req->mid_map);
- TALLOC_FREE(req->backend_data);
- SAFE_FREE(req);
+ DLIST_REMOVE(sconn->smb1.notify_mid_maps, req->mid_map);
+ TALLOC_FREE(req);
+}
+
+static void smbd_notify_cancel_by_map(struct notify_mid_map *map)
+{
+ struct smb_request *smbreq = map->req->req;
+ struct smbd_server_connection *sconn = smbreq->sconn;
+ struct smbd_smb2_request *smb2req = smbreq->smb2req;
+ NTSTATUS notify_status = NT_STATUS_CANCELLED;
+
+ if (smb2req != NULL) {
+ if (smb2req->session == NULL) {
+ notify_status = STATUS_NOTIFY_CLEANUP;
+ } else if (!NT_STATUS_IS_OK(smb2req->session->status)) {
+ notify_status = STATUS_NOTIFY_CLEANUP;
+ }
+ if (smb2req->tcon == NULL) {
+ notify_status = STATUS_NOTIFY_CLEANUP;
+ } else if (!NT_STATUS_IS_OK(smb2req->tcon->status)) {
+ notify_status = STATUS_NOTIFY_CLEANUP;
+ }
+ }
+
+ change_notify_reply(smbreq, notify_status,
+ 0, NULL, map->req->reply_fn);
+ change_notify_remove_request(sconn, map->req);
}
/****************************************************************************
Delete entries by mid from the change notify pending queue. Always send reply.
*****************************************************************************/
-void remove_pending_change_notify_requests_by_mid(uint16 mid)
+void remove_pending_change_notify_requests_by_mid(
+ struct smbd_server_connection *sconn, uint64_t mid)
{
struct notify_mid_map *map;
- for (map = notify_changes_by_mid; map; map = map->next) {
+ for (map = sconn->smb1.notify_mid_maps; map; map = map->next) {
if (map->mid == mid) {
break;
}
return;
}
- change_notify_reply_packet(map->req->fsp->conn,
- map->req->request_buf, NT_STATUS_CANCELLED);
- change_notify_remove_request(map->req);
+ smbd_notify_cancel_by_map(map);
+}
+
+void smbd_notify_cancel_by_smbreq(const struct smb_request *smbreq)
+{
+ struct smbd_server_connection *sconn = smbreq->sconn;
+ struct notify_mid_map *map;
+
+ for (map = sconn->smb1.notify_mid_maps; map; map = map->next) {
+ if (map->req->req == smbreq) {
+ break;
+ }
+ }
+
+ if (map == NULL) {
+ return;
+ }
+
+ smbd_notify_cancel_by_map(map);
+}
+
+static struct files_struct *smbd_notify_cancel_deleted_fn(
+ struct files_struct *fsp, void *private_data)
+{
+ struct file_id *fid = talloc_get_type_abort(
+ private_data, struct file_id);
+
+ if (file_id_equal(&fsp->file_id, fid)) {
+ remove_pending_change_notify_requests_by_fid(
+ fsp, NT_STATUS_DELETE_PENDING);
+ }
+ return NULL;
+}
+
+void smbd_notify_cancel_deleted(struct messaging_context *msg,
+ void *private_data, uint32_t msg_type,
+ struct server_id server_id, DATA_BLOB *data)
+{
+ struct smbd_server_connection *sconn = talloc_get_type_abort(
+ private_data, struct smbd_server_connection);
+ struct file_id *fid;
+ enum ndr_err_code ndr_err;
+
+ fid = talloc(talloc_tos(), struct file_id);
+ if (fid == NULL) {
+ DEBUG(1, ("talloc failed\n"));
+ return;
+ }
+
+ ndr_err = ndr_pull_struct_blob_all(
+ data, fid, fid, (ndr_pull_flags_fn_t)ndr_pull_file_id);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(10, ("%s: ndr_pull_file_id failed: %s\n", __func__,
+ ndr_errstr(ndr_err)));
+ goto done;
+ }
+
+ files_forall(sconn, smbd_notify_cancel_deleted_fn, fid);
+
+done:
+ TALLOC_FREE(fid);
}
/****************************************************************************
}
while (fsp->notify->requests != NULL) {
- change_notify_reply_packet(fsp->conn,
- fsp->notify->requests->request_buf, status);
- change_notify_remove_request(fsp->notify->requests);
+ change_notify_reply(fsp->notify->requests->req,
+ status, 0, NULL,
+ fsp->notify->requests->reply_fn);
+ change_notify_remove_request(fsp->conn->sconn,
+ fsp->notify->requests);
}
}
-void notify_fname(connection_struct *conn, uint32 action, uint32 filter,
+void notify_fname(connection_struct *conn, uint32_t action, uint32_t filter,
const char *path)
{
- char *fullpath;
+ struct notify_context *notify_ctx = conn->sconn->notify_ctx;
- if (asprintf(&fullpath, "%s/%s", conn->connectpath, path) == -1) {
- DEBUG(0, ("asprintf failed\n"));
- return;
+ if (path[0] == '.' && path[1] == '/') {
+ path += 2;
}
- notify_trigger(conn->notify_ctx, action, filter, fullpath);
- SAFE_FREE(fullpath);
+ notify_trigger(notify_ctx, action, filter, conn->connectpath, path);
}
-static void notify_fsp(files_struct *fsp, uint32 action, const char *name)
+static void notify_fsp(files_struct *fsp, struct timespec when,
+ uint32_t action, const char *name)
{
- struct notify_change *change, *changes;
+ struct notify_change_event *change, *changes;
char *tmp;
if (fsp->notify == NULL) {
if ((fsp->notify->num_changes > 1000) || (name == NULL)) {
/*
* The real number depends on the client buf, just provide a
- * guard against a DoS here.
+ * guard against a DoS here. If name == NULL the CN backend is
+ * alerting us to a problem. Possibly dropped events. Clear
+ * queued changes and send the catch-all response to the client
+ * if a request is pending.
*/
TALLOC_FREE(fsp->notify->changes);
fsp->notify->num_changes = -1;
+ if (fsp->notify->requests != NULL) {
+ change_notify_reply(fsp->notify->requests->req,
+ NT_STATUS_OK,
+ fsp->notify->requests->max_param,
+ fsp->notify,
+ fsp->notify->requests->reply_fn);
+ change_notify_remove_request(fsp->conn->sconn,
+ fsp->notify->requests);
+ }
return;
}
+ /* If we've exceeded the server side queue or received a NULL name
+ * from the underlying CN implementation, don't queue up any more
+ * requests until we can send a catch-all response to the client */
if (fsp->notify->num_changes == -1) {
return;
}
- if (!(changes = TALLOC_REALLOC_ARRAY(
+ if (!(changes = talloc_realloc(
fsp->notify, fsp->notify->changes,
- struct notify_change, fsp->notify->num_changes+1))) {
+ struct notify_change_event,
+ fsp->notify->num_changes+1))) {
DEBUG(0, ("talloc_realloc failed\n"));
return;
}
string_replace(tmp, '/', '\\');
change->name = tmp;
+ change->when = when;
change->action = action;
fsp->notify->num_changes += 1;
* TODO: do we have to walk the lists of requests pending?
*/
- change_notify_reply(fsp->conn,
- fsp->notify->requests->request_buf,
+ change_notify_reply(fsp->notify->requests->req,
+ NT_STATUS_OK,
fsp->notify->requests->max_param,
- fsp->notify);
+ fsp->notify,
+ fsp->notify->requests->reply_fn);
- change_notify_remove_request(fsp->notify->requests);
+ change_notify_remove_request(fsp->conn->sconn, fsp->notify->requests);
}
-char *notify_filter_string(TALLOC_CTX *mem_ctx, uint32 filter)
+char *notify_filter_string(TALLOC_CTX *mem_ctx, uint32_t filter)
{
char *result = NULL;
return result;
}
-struct sys_notify_context *sys_notify_context_create(connection_struct *conn,
- TALLOC_CTX *mem_ctx,
- struct event_context *ev)
+struct sys_notify_context *sys_notify_context_create(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev)
{
struct sys_notify_context *ctx;
- if (!(ctx = TALLOC_P(mem_ctx, struct sys_notify_context))) {
+ if (!(ctx = talloc(mem_ctx, struct sys_notify_context))) {
DEBUG(0, ("talloc failed\n"));
return NULL;
}
ctx->ev = ev;
- ctx->conn = conn;
ctx->private_data = NULL;
return ctx;
}
-
-NTSTATUS sys_notify_watch(struct sys_notify_context *ctx,
- struct notify_entry *e,
- void (*callback)(struct sys_notify_context *ctx,
- void *private_data,
- struct notify_event *ev),
- void *private_data, void *handle)
-{
- return SMB_VFS_NOTIFY_WATCH(ctx->conn, ctx, e, callback, private_data,
- handle);
-}
-
git.samba.org / samba.git / blobdiff