/src/samba/source3/smbd/notify.c

Source
/*
   Unix SMB/CIFS implementation.
   change notify handling
   Copyright (C) Andrew Tridgell 2000
   Copyright (C) Jeremy Allison 1994-1998
   Copyright (C) Volker Lendecke 2007

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#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"
#include "libcli/security/privileges.h"
#include "libcli/security/security.h"

struct notify_change_event {
  struct timespec when;
  uint32_t action;
  const char *name;
};

struct notify_change_buf {
  /*
   * Filters for reinitializing after notifyd has been restarted
   */
  uint32_t filter;
  uint32_t subdir_filter;

  /*
   * If no requests are pending, changes are queued here. Simple array,
   * we only append.
   */

  uint32_t max_buffer_size;

  /*
   * 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 */
  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, 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;
  }

  if (fsp->notify->num_changes == 0) {
    return false;
  }

  return true;
}

/*
 * For NTCancel, we need to find the notify_change_request indexed by
 * mid. Separate list here.
 */

struct notify_mid_map {
  struct notify_mid_map *prev, *next;
  struct notify_change_request *req;
  uint64_t mid;
};

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 &&
      strcmp(c1->name, c2->name) == 0) {
    return True;
  }
  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_t max_offset,
        struct notify_change_event *changes,
        DATA_BLOB *final_blob)
{
  int i;

  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++) {
    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 &&
      notify_change_record_identical(&changes[i],
            &changes[i+1])) {
      i++;
    }

    c = &changes[i];

    m.FileName1 = c->name;
    m.FileNameLength = strlen_m(c->name)*2;
    m.Action = c->action;

    m._pad = data_blob_null;

    /*
     * Offset to next entry, only if there is one
     */

    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);
    }

    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 (DEBUGLEVEL >= 10) {
      NDR_PRINT_DEBUG(FILE_NOTIFY_INFORMATION, &m);
    }

    if (!data_blob_append(talloc_tos(), final_blob,
              blob.data, blob.length)) {
      data_blob_free(&blob);
      return false;
    }

    data_blob_free(&blob);

    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;
}

/****************************************************************************
 Setup the common parts of the return packet and send it.
*****************************************************************************/

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))
{
  DATA_BLOB blob = data_blob_null;

  if (!NT_STATUS_IS_OK(error_code)) {
    reply_fn(req, error_code, NULL, 0);
    return;
  }

  if (notify_buf == NULL) {
    reply_fn(req, NT_STATUS_OK, NULL, 0);
    return;
  }

  max_param = MIN(max_param, notify_buf->max_buffer_size);

  if (!notify_marshall_changes(notify_buf->num_changes, max_param,
          notify_buf->changes, &blob)) {
    /*
     * We exceed what the client is willing to accept. Send
     * nothing.
     */
    data_blob_free(&blob);
  }

  reply_fn(req, NT_STATUS_OK, blob.data, blob.length);

  data_blob_free(&blob);

  TALLOC_FREE(notify_buf->changes);
  notify_buf->num_changes = 0;
}

struct notify_fsp_state {
  struct files_struct *notified_fsp;
  struct timespec when;
  const struct notify_event *e;
};

static struct files_struct *notify_fsp_cb(struct files_struct *fsp,
            void *private_data)
{
  struct notify_fsp_state *state = private_data;

  if (fsp == state->notified_fsp) {
    DBG_DEBUG("notify_callback called for %s\n", fsp_str_dbg(fsp));
    notify_fsp(fsp, state->when, state->e->action, state->e->path);
    return fsp;
  }

  return NULL;
}

void notify_callback(struct smbd_server_connection *sconn,
         void *private_data, struct timespec when,
         const struct notify_event *e)
{
  struct notify_fsp_state state = {
    .notified_fsp = private_data, .when = when, .e = e
  };
  files_forall(sconn, notify_fsp_cb, &state);
}

NTSTATUS change_notify_create(struct files_struct *fsp,
            uint32_t max_buffer_size,
            uint32_t filter,
            bool recursive)
{
  size_t len = fsp_fullbasepath(fsp, NULL, 0);
  char fullpath[len+1];
  NTSTATUS status = NT_STATUS_NOT_IMPLEMENTED;

  /*
   * Setting a changenotify needs READ/LIST access
   * on the directory handle.
   */
  status = check_any_access_fsp(fsp, SEC_DIR_LIST);
  if (!NT_STATUS_IS_OK(status)) {
    return status;
  }

  if (fsp->notify != NULL) {
    DEBUG(1, ("change_notify_create: fsp->notify != NULL, "
        "fname = %s\n", fsp_str_dbg(fsp)));
    return NT_STATUS_INVALID_PARAMETER;
  }

  if (!(fsp->notify = talloc_zero(NULL, struct notify_change_buf))) {
    DEBUG(0, ("talloc failed\n"));
    return NT_STATUS_NO_MEMORY;
  }
  fsp->notify->filter = filter;
  fsp->notify->subdir_filter = recursive ? filter : 0;
  fsp->notify->max_buffer_size = max_buffer_size;

  fsp_fullbasepath(fsp, fullpath, sizeof(fullpath));

  if ((fsp->notify->filter != 0) ||
      (fsp->notify->subdir_filter != 0)) {
    status = notify_add(fsp->conn->sconn->notify_ctx,
            fullpath, fsp->notify->filter,
            fsp->notify->subdir_filter, fsp);
  }

  return status;
}

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 = 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;

  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);

  map->mid = request->req->mid;
  DLIST_ADD(sconn->notify_mid_maps, map);

  return NT_STATUS_OK;
}

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;

  /*
   * Paranoia checks, the fsp referenced must must have the request in
   * its list of pending requests
   */

  fsp = remove_req->fsp;
  SMB_ASSERT(fsp->notify != NULL);

  for (req = fsp->notify->requests; req; req = req->next) {
    if (req == remove_req) {
      break;
    }
  }

  if (req == NULL) {
    smb_panic("notify_req not found in fsp's requests");
  }

  DLIST_REMOVE(fsp->notify->requests, req);
  DLIST_REMOVE(sconn->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) {
    NTSTATUS sstatus;

    if (smb2req->session == NULL) {
      sstatus = NT_STATUS_USER_SESSION_DELETED;
    } else {
      sstatus = smb2req->session->status;
    }

    if (NT_STATUS_EQUAL(sstatus, NT_STATUS_NETWORK_SESSION_EXPIRED)) {
      sstatus = NT_STATUS_OK;
    }

    if (!NT_STATUS_IS_OK(sstatus)) {
      notify_status = NT_STATUS_NOTIFY_CLEANUP;
    } else if (smb2req->tcon == NULL) {
      notify_status = NT_STATUS_NOTIFY_CLEANUP;
    } else if (!NT_STATUS_IS_OK(smb2req->tcon->status)) {
      notify_status = NT_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.
*****************************************************************************/

bool remove_pending_change_notify_requests_by_mid(
  struct smbd_server_connection *sconn, uint64_t mid)
{
  struct notify_mid_map *map;

  for (map = sconn->notify_mid_maps; map; map = map->next) {
    if (map->mid == mid) {
      break;
    }
  }

  if (map == NULL) {
    return false;
  }

  smbd_notify_cancel_by_map(map);
  return true;
}

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->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);
}

static struct files_struct *smbd_notifyd_reregister(struct files_struct *fsp,
                void *private_data)
{
  DBG_DEBUG("reregister %s\n", fsp_str_dbg(fsp));

  if ((fsp->conn->sconn->notify_ctx != NULL) &&
      (fsp->notify != NULL) &&
      ((fsp->notify->filter != 0) ||
       (fsp->notify->subdir_filter != 0))) {
    size_t len = fsp_fullbasepath(fsp, NULL, 0);
    char fullpath[len+1];

    NTSTATUS status;

    fsp_fullbasepath(fsp, fullpath, sizeof(fullpath));

    status = notify_add(fsp->conn->sconn->notify_ctx,
            fullpath, fsp->notify->filter,
            fsp->notify->subdir_filter, fsp);
    if (!NT_STATUS_IS_OK(status)) {
      DBG_DEBUG("notify_add failed: %s\n",
          nt_errstr(status));
    }
  }
  return NULL;
}

void smbd_notifyd_restarted(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);

  TALLOC_FREE(sconn->notify_ctx);

  sconn->notify_ctx = notify_init(sconn, sconn->msg_ctx,
          sconn, notify_callback);
  if (sconn->notify_ctx == NULL) {
    DBG_DEBUG("notify_init failed\n");
    return;
  }

  files_forall(sconn, smbd_notifyd_reregister, sconn->notify_ctx);
}

/****************************************************************************
 Delete entries by fnum from the change notify pending queue.
*****************************************************************************/

void remove_pending_change_notify_requests_by_fid(files_struct *fsp,
              NTSTATUS status)
{
  if (fsp->notify == NULL) {
    return;
  }

  while (fsp->notify->requests != NULL) {
    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(struct connection_struct *conn,
      uint32_t action,
      uint32_t filter,
      const struct smb_filename *smb_fname,
      const struct smb2_lease *lease)
{
  struct notify_context *notify_ctx = conn->sconn->notify_ctx;
  const char *path = smb_fname->base_name;

  if (action & NOTIFY_ACTION_DIRLEASE_BREAK) {
    contend_dirleases(conn, smb_fname, lease);
  }
  action &= ~NOTIFY_ACTION_DIRLEASE_BREAK;
  if (action == 0) {
    return;
  }

  if (path[0] == '.' && path[1] == '/') {
    path += 2;
  }

  notify_trigger(notify_ctx, action, filter, conn->connectpath, path);
}

static bool user_can_stat_name_under_fsp(files_struct *fsp, const char *name)
{
  uint32_t rights;
  struct smb_filename *fname = NULL;
  char *filepath = NULL;
  NTSTATUS status;
  char *p = NULL;

  /*
   * Assume we get filepath (relative to the share)
   * like this:
   *
   *  'dir1/dir2/dir3/file'
   *
   * We start with LIST and TRAVERSE on the
   * direct parent ('dir1/dir2/dir3')
   *
   * Then we switch to just TRAVERSE for
   * the rest: 'dir1/dir2', 'dir1', '.'
   *
   * For a file in the share root, we'll have
   *  'file'
   * and would just check '.' with LIST and TRAVERSE.
   *
   * It's important to always check '.' as the last step,
   * which means we check the permissions of the share root
   * directory.
   */

  if (ISDOT(fsp->fsp_name->base_name)) {
    filepath = talloc_strdup(talloc_tos(), name);
  } else {
    filepath = talloc_asprintf(talloc_tos(),
      "%s/%s",
      fsp->fsp_name->base_name,
      name);
  }
  if (filepath == NULL) {
    DBG_ERR("Memory allocation failed\n");
    return false;
  }

  rights = SEC_DIR_LIST|SEC_DIR_TRAVERSE;
  p = strrchr_m(filepath, '/');
  /*
   * Check each path component, excluding the share root.
   *
   * We could check all components including root using
   * a do { .. } while() loop, but IMHO the logic is clearer
   * having the share root check separately afterwards.
   */
  while (p != NULL) {
    *p = '\0';
    status = synthetic_pathref(talloc_tos(),
             fsp->conn->cwd_fsp,
             filepath,
             NULL,
             NULL,
             0,
             0,
             &fname);
    if (!NT_STATUS_IS_OK(status)) {
      int dbg_lvl = DBGLVL_ERR;
      if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
        dbg_lvl = DBGLVL_DEBUG;
      }
      DBG_PREFIX(dbg_lvl, (
           "synthetic_pathref failed for %s, error %s\n",
           filepath,
           nt_errstr(status)));
      TALLOC_FREE(fname);
      TALLOC_FREE(filepath);
      return false;
    }

    status = smbd_check_access_rights_fsp(fsp->conn->cwd_fsp,
              fname->fsp,
              false,
              rights);
    if (!NT_STATUS_IS_OK(status)) {
      DBG_DEBUG("Access rights for %s/%s: %s\n",
          fsp->conn->connectpath,
          filepath,
          nt_errstr(status));
      TALLOC_FREE(fname);
      TALLOC_FREE(filepath);
      return false;
    }

    TALLOC_FREE(fname);
    rights = SEC_DIR_TRAVERSE;
    p = strrchr_m(filepath, '/');
  }

  TALLOC_FREE(filepath);

  /* Finally check share root. */
  filepath = talloc_strdup(talloc_tos(), ".");
  if (filepath == NULL) {
    DBG_ERR("Memory allocation failed\n");
    return false;
  }
  status = synthetic_pathref(talloc_tos(),
           fsp->conn->cwd_fsp,
           filepath,
           NULL,
           NULL,
           0,
           0,
           &fname);
  if (!NT_STATUS_IS_OK(status)) {
    DBG_ERR("synthetic_pathref failed for %s, error %s\n",
      filepath,
      nt_errstr(status));
    TALLOC_FREE(fname);
    TALLOC_FREE(filepath);
    return false;
  }
  status = smbd_check_access_rights_fsp(fsp->conn->cwd_fsp,
            fname->fsp,
            false,
            rights);
  if (!NT_STATUS_IS_OK(status)) {
    DBG_DEBUG("TRAVERSE access rights for %s failed with %s\n",
        fsp->conn->connectpath,
        nt_errstr(status));
    TALLOC_FREE(fname);
    TALLOC_FREE(filepath);
    return false;
  }
  TALLOC_FREE(fname);
  TALLOC_FREE(filepath);
  return true;
}

static void notify_fsp(files_struct *fsp, struct timespec when,
           uint32_t action, const char *name)
{
  struct notify_change_event *change, *changes;
  char *tmp;

  if (fsp->notify == NULL) {
    /*
     * Nobody is waiting, don't queue
     */
    return;
  }

  if (lp_honor_change_notify_privilege(SNUM(fsp->conn))) {
    bool has_sec_change_notify_privilege;
    bool expose = false;

    has_sec_change_notify_privilege = security_token_has_privilege(
      fsp->conn->session_info->security_token,
      SEC_PRIV_CHANGE_NOTIFY);

    if (has_sec_change_notify_privilege) {
      expose = true;
    } else {
      bool ok;

      ok = become_user_without_service_by_fsp(fsp);
      if (ok) {
        expose = user_can_stat_name_under_fsp(fsp, name);
        unbecome_user_without_service();
      }
    }
    DBG_DEBUG("has_sec_change_notify_privilege=%s "
        "expose=%s for %s notify %s\n",
        has_sec_change_notify_privilege ? "true" : "false",
        expose ? "true" : "false",
        fsp_str_dbg(fsp),
        name);
    if (!expose) {
      return;
    }
  }

  /*
   * Someone has triggered a notify previously, queue the change for
   * later.
   */

  if ((fsp->notify->num_changes > 1000) || (name == NULL)) {
    /*
     * The real number depends on the client buf, just provide a
     * 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(
          fsp->notify, fsp->notify->changes,
          struct notify_change_event,
          fsp->notify->num_changes+1))) {
    DEBUG(0, ("talloc_realloc failed\n"));
    return;
  }

  fsp->notify->changes = changes;

  change = &(fsp->notify->changes[fsp->notify->num_changes]);

  if (!(tmp = talloc_strdup(changes, name))) {
    DEBUG(0, ("talloc_strdup failed\n"));
    return;
  }

  string_replace(tmp, '/', '\\');
  change->name = tmp;

  change->when = when;
  change->action = action;
  fsp->notify->num_changes += 1;

  if (fsp->notify->requests == NULL) {
    /*
     * Nobody is waiting, so don't send anything. The ot
     */
    return;
  }

  if (action == NOTIFY_ACTION_OLD_NAME) {
    /*
     * We have to send the two rename events in one reply. So hold
     * the first part back.
     */
    return;
  }

  /*
   * Someone is waiting for the change, trigger the reply immediately.
   *
   * TODO: do we have to walk the lists of requests pending?
   */

  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);
}

char *notify_filter_string(TALLOC_CTX *mem_ctx, uint32_t filter)
{
  char *result = NULL;

  result = talloc_strdup(mem_ctx, "");

  if (filter & FILE_NOTIFY_CHANGE_FILE_NAME) {
    talloc_asprintf_addbuf(&result, "FILE_NAME|");
  }
  if (filter & FILE_NOTIFY_CHANGE_DIR_NAME) {
    talloc_asprintf_addbuf(&result, "DIR_NAME|");
  }
  if (filter & FILE_NOTIFY_CHANGE_ATTRIBUTES) {
    talloc_asprintf_addbuf(&result, "ATTRIBUTES|");
  }
  if (filter & FILE_NOTIFY_CHANGE_SIZE) {
    talloc_asprintf_addbuf(&result, "SIZE|");
  }
  if (filter & FILE_NOTIFY_CHANGE_LAST_WRITE) {
    talloc_asprintf_addbuf(&result, "LAST_WRITE|");
  }
  if (filter & FILE_NOTIFY_CHANGE_LAST_ACCESS) {
    talloc_asprintf_addbuf(&result, "LAST_ACCESS|");
  }
  if (filter & FILE_NOTIFY_CHANGE_CREATION) {
    talloc_asprintf_addbuf(&result, "CREATION|");
  }
  if (filter & FILE_NOTIFY_CHANGE_EA) {
    talloc_asprintf_addbuf(&result, "EA|");
  }
  if (filter & FILE_NOTIFY_CHANGE_SECURITY) {
    talloc_asprintf_addbuf(&result, "SECURITY|");
  }
  if (filter & FILE_NOTIFY_CHANGE_STREAM_NAME) {
    talloc_asprintf_addbuf(&result, "STREAM_NAME|");
  }
  if (filter & FILE_NOTIFY_CHANGE_STREAM_SIZE) {
    talloc_asprintf_addbuf(&result, "STREAM_SIZE|");
  }
  if (filter & FILE_NOTIFY_CHANGE_STREAM_WRITE) {
    talloc_asprintf_addbuf(&result, "STREAM_WRITE|");
  }

  if (result == NULL) {
    return NULL;
  }

  if (*result == '\0') return result;

  result[strlen(result)-1] = '\0';
  return result;
}

struct sys_notify_context *sys_notify_context_create(TALLOC_CTX *mem_ctx,
                 struct tevent_context *ev)
{
  struct sys_notify_context *ctx;

  if (!(ctx = talloc(mem_ctx, struct sys_notify_context))) {
    DEBUG(0, ("talloc failed\n"));
    return NULL;
  }

  ctx->ev = ev;
  ctx->private_data = NULL;
  return ctx;
}

Coverage Report

Created: 2026-05-24 06:47