#include "includes.h"
static struct cnotify_fns *cnotify;
-static struct notify_mid_map *notify_changes_by_mid;
/****************************************************************************
This is the structure to queue to implement NT change
struct change_notify {
struct change_notify *next, *prev;
files_struct *fsp;
+ connection_struct *conn;
uint32 flags;
- uint32 max_param_count;
char request_buf[smb_size];
void *change_data;
};
static struct change_notify *change_notify_list;
-static BOOL notify_marshall_changes(unsigned num_changes,
- struct notify_change *changes,
- prs_struct *ps)
-{
- int i;
- UNISTR uni_name;
-
- for (i=0; i<num_changes; i++) {
- struct notify_change *c = &changes[i];
- size_t namelen;
- uint32 u32_tmp; /* Temp arg to prs_uint32 to avoid
- * signed/unsigned issues */
-
- 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;
- }
-
- namelen -= 2; /* Dump NULL termination */
-
- /*
- * 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;
-
- u32_tmp = namelen;
- if (!prs_uint32("namelen", ps, 1, &u32_tmp)) goto fail;
-
- if (!prs_unistr("name", ps, 1, &uni_name)) goto fail;
-
- /*
- * Not NULL terminated, decrease by the 2 UCS2 \0 chars
- */
- prs_set_offset(ps, prs_offset(ps)-2);
-
- SAFE_FREE(uni_name.buffer);
- }
-
- return True;
-
- fail:
- SAFE_FREE(uni_name.buffer);
- return False;
-}
-
/****************************************************************************
Setup the common parts of the return packet and send it.
*****************************************************************************/
-void change_notify_reply_packet(const char *request_buf, NTSTATUS error_code)
+static void change_notify_reply_packet(char *inbuf, NTSTATUS error_code)
{
char outbuf[smb_size+38];
memset(outbuf, '\0', sizeof(outbuf));
- construct_reply_common(request_buf, outbuf);
+ construct_reply_common(inbuf, outbuf);
ERROR_NT(error_code);
exit_server_cleanly("change_notify_reply_packet: send_smb failed.");
}
-void change_notify_reply(const char *request_buf, uint32 max_param_count,
- unsigned num_changes, struct notify_change *changes)
-{
- char *outbuf = NULL;
- prs_struct ps;
- size_t buflen = smb_size+38+max_param_count;
-
- if (!prs_init(&ps, 0, NULL, False)
- || !notify_marshall_changes(num_changes, changes, &ps)) {
- change_notify_reply_packet(request_buf, NT_STATUS_NO_MEMORY);
- goto done;
- }
-
- if (prs_offset(&ps) > max_param_count) {
- /*
- * We exceed what the client is willing to accept. Send
- * nothing.
- */
- change_notify_reply_packet(request_buf, NT_STATUS_OK);
- goto done;
- }
-
- if (!(outbuf = SMB_MALLOC_ARRAY(char, buflen))) {
- change_notify_reply_packet(request_buf, NT_STATUS_NO_MEMORY);
- goto done;
- }
-
- construct_reply_common(request_buf, outbuf);
-
- if (send_nt_replies(outbuf, buflen, NT_STATUS_OK, prs_data_p(&ps),
- prs_offset(&ps), NULL, 0) == -1) {
- exit_server("change_notify_reply_packet: send_smb failed.");
- }
-
- done:
- SAFE_FREE(outbuf);
- prs_mem_free(&ps);
-}
-
/****************************************************************************
Remove an entry from the list and free it, also closing any
directory handle if necessary.
SAFE_FREE(cnbp);
}
-NTSTATUS change_notify_add_request(const char *inbuf, uint32 max_param_count,
- uint32 filter, struct files_struct *fsp)
-{
- struct notify_change_request *request = NULL;
- struct notify_mid_map *map = NULL;
-
- if (!(request = SMB_MALLOC_P(struct notify_change_request))
- || !(map = SMB_MALLOC_P(struct notify_mid_map))) {
- SAFE_FREE(request);
- return NT_STATUS_NO_MEMORY;
- }
-
- request->mid_map = map;
- map->req = request;
-
- memcpy(request->request_buf, inbuf, sizeof(request->request_buf));
- request->max_param_count = max_param_count;
- request->filter = filter;
- request->fsp = fsp;
- DLIST_ADD_END(fsp->notify->requests, request,
- struct notify_change_request *);
-
- map->mid = SVAL(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(inbuf,smb_mid));
-
- return NT_STATUS_OK;
-}
-
-static void change_notify_remove_request(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\n");
- }
-
- DLIST_REMOVE(fsp->notify->requests, req);
- DLIST_REMOVE(notify_changes_by_mid, req->mid_map);
- SAFE_FREE(req->mid_map);
- SAFE_FREE(req);
-}
-
/****************************************************************************
- Delete entries by mid from the change notify pending queue. Always send reply.
+ Delete entries by fnum from the change notify pending queue.
*****************************************************************************/
-void remove_pending_change_notify_requests_by_mid(uint16 mid)
+void remove_pending_change_notify_requests_by_fid(files_struct *fsp, NTSTATUS status)
{
- struct notify_mid_map *map;
+ struct change_notify *cnbp, *next;
- for (map = notify_changes_by_mid; map; map = map->next) {
- if (map->mid == mid) {
- break;
+ for (cnbp=change_notify_list; cnbp; cnbp=next) {
+ next=cnbp->next;
+ if (cnbp->fsp->fnum == fsp->fnum) {
+ change_notify_reply_packet(cnbp->request_buf,status);
+ change_notify_remove(cnbp);
}
}
-
- if (map == NULL) {
- return;
- }
-
- change_notify_reply_packet(map->req->request_buf, NT_STATUS_CANCELLED);
- change_notify_remove_request(map->req);
}
/****************************************************************************
- Delete entries by fnum from the change notify pending queue.
+ Delete entries by mid from the change notify pending queue. Always send reply.
*****************************************************************************/
-void remove_pending_change_notify_requests_by_fid(files_struct *fsp,
- NTSTATUS status)
+void remove_pending_change_notify_requests_by_mid(int mid)
{
- if (fsp->notify == NULL) {
- return;
- }
+ struct change_notify *cnbp, *next;
- while (fsp->notify->requests != NULL) {
- change_notify_reply_packet(
- fsp->notify->requests->request_buf, status);
- change_notify_remove_request(fsp->notify->requests);
+ for (cnbp=change_notify_list; cnbp; cnbp=next) {
+ next=cnbp->next;
+ if(SVAL(cnbp->request_buf,smb_mid) == mid) {
+ change_notify_reply_packet(cnbp->request_buf,NT_STATUS_CANCELLED);
+ change_notify_remove(cnbp);
+ }
}
}
* the filename are identical.
*/
if((cnbp->fsp->conn == fsp->conn) && strequal(cnbp->fsp->fsp_name,fsp->fsp_name)) {
- change_notify_reply_packet(cnbp->request_buf, status);
+ change_notify_reply_packet(cnbp->request_buf,status);
change_notify_remove(cnbp);
}
}
vuid = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID : SVAL(cnbp->request_buf,smb_uid);
- if (cnbp->fsp->notify->num_changes != 0) {
- DEBUG(10,("process_pending_change_notify_queue: %s "
- "has %d changes!\n", cnbp->fsp->fsp_name,
- cnbp->fsp->notify->num_changes));
- change_notify_reply(cnbp->request_buf,
- cnbp->max_param_count,
- cnbp->fsp->notify->num_changes,
- cnbp->fsp->notify->changes);
- change_notify_remove(cnbp);
- continue;
- }
-
- if (cnotify->check_notify(cnbp->fsp->conn, vuid,
- cnbp->fsp->fsp_name, cnbp->flags,
- cnbp->change_data, t)) {
- DEBUG(10,("process_pending_change_notify_queue: dir "
- "%s changed !\n", cnbp->fsp->fsp_name ));
- change_notify_reply(cnbp->request_buf,
- cnbp->max_param_count,
- cnbp->fsp->notify->num_changes,
- cnbp->fsp->notify->changes);
+ if (cnotify->check_notify(cnbp->conn, vuid, cnbp->fsp->fsp_name, cnbp->flags, cnbp->change_data, t)) {
+ DEBUG(10,("process_pending_change_notify_queue: dir %s changed !\n", cnbp->fsp->fsp_name ));
+ change_notify_reply_packet(cnbp->request_buf,STATUS_NOTIFY_ENUM_DIR);
change_notify_remove(cnbp);
}
}
error.
****************************************************************************/
-BOOL change_notify_set(char *inbuf, files_struct *fsp, connection_struct *conn,
- uint32 flags, uint32 max_param_count)
+BOOL change_notify_set(char *inbuf, files_struct *fsp, connection_struct *conn, uint32 flags)
{
struct change_notify *cnbp;
if((cnbp = SMB_MALLOC_P(struct change_notify)) == NULL) {
DEBUG(0,("change_notify_set: malloc fail !\n" ));
- return False;
+ return -1;
}
ZERO_STRUCTP(cnbp);
memcpy(cnbp->request_buf, inbuf, smb_size);
cnbp->fsp = fsp;
+ cnbp->conn = conn;
cnbp->flags = flags;
- cnbp->max_param_count = max_param_count;
- cnbp->change_data = cnotify->register_notify(conn, fsp->fsp_name,
- flags);
+ cnbp->change_data = cnotify->register_notify(conn, fsp->fsp_name, flags);
if (!cnbp->change_data) {
SAFE_FREE(cnbp);
return -1;
}
-/* notify message definition
-
-Offset Data length.
-0 SMB_DEV_T dev 8
-8 SMB_INO_T inode 8
-16 uint32 filter 4
-20 uint32 action 4
-24.. name
-*/
-
-#define MSG_NOTIFY_MESSAGE_SIZE 25 /* Includes at least the '\0' terminator */
-
-struct notify_message {
- SMB_DEV_T dev;
- SMB_INO_T inode;
- uint32 filter;
- uint32 action;
- char *name;
-};
-
-static DATA_BLOB notify_message_to_buf(const struct notify_message *msg)
-{
- DATA_BLOB result;
- size_t len;
-
- len = strlen(msg->name);
-
- result = data_blob(NULL, MSG_NOTIFY_MESSAGE_SIZE + len);
- if (!result.data) {
- return result;
- }
-
- SDEV_T_VAL(result.data, 0, msg->dev);
- SINO_T_VAL(result.data, 8, msg->inode);
- SIVAL(result.data, 16, msg->filter);
- SIVAL(result.data, 20, msg->action);
- memcpy(result.data+24, msg->name, len+1);
-
- return result;
-}
-
-static BOOL buf_to_notify_message(void *buf, size_t len,
- struct notify_message *msg)
-{
- if (len < MSG_NOTIFY_MESSAGE_SIZE) {
- DEBUG(0, ("Got invalid notify message of len %d\n",
- (int)len));
- return False;
- }
-
- msg->dev = DEV_T_VAL(buf, 0);
- msg->inode = INO_T_VAL(buf, 8);
- msg->filter = IVAL(buf, 16);
- msg->action = IVAL(buf, 20);
- msg->name = ((char *)buf)+24;
- return True;
-}
-
-void notify_action(connection_struct *conn, const char *parent,
- const char *name, uint32 filter, uint32_t action)
-{
- struct share_mode_lock *lck;
- SMB_STRUCT_STAT sbuf;
- int i;
- struct notify_message msg;
- DATA_BLOB blob;
-
- struct process_id *pids;
- int num_pids;
-
- DEBUG(10, ("notify_action: parent=%s, name=%s, action=%u\n",
- parent, name, (unsigned)action));
-
- if (SMB_VFS_STAT(conn, parent, &sbuf) != 0) {
- /*
- * Not 100% critical, ignore failure
- */
- return;
- }
-
- if (!(lck = get_share_mode_lock(NULL, sbuf.st_dev, sbuf.st_ino,
- NULL, NULL))) {
- return;
- }
-
- msg.dev = sbuf.st_dev;
- msg.inode = sbuf.st_ino;
- msg.filter = filter;
- msg.action = action;
- msg.name = CONST_DISCARD(char *, name);
-
- blob = notify_message_to_buf(&msg);
- if (blob.data == NULL) {
- DEBUG(0, ("notify_message_to_buf failed\n"));
- return;
- }
-
- pids = NULL;
- num_pids = 0;
-
- become_root_uid_only();
-
- for (i=0; i<lck->num_share_modes; i++) {
- struct share_mode_entry *e = &lck->share_modes[i];
- int j;
- struct process_id *tmp;
-
- for (j=0; j<num_pids; j++) {
- if (procid_equal(&e->pid, &pids[j])) {
- break;
- }
- }
-
- if (j < num_pids) {
- /*
- * Already sent to that process, skip it
- */
- continue;
- }
-
- message_send_pid(lck->share_modes[i].pid, MSG_SMB_NOTIFY,
- blob.data, blob.length, True);
-
- if (!(tmp = TALLOC_REALLOC_ARRAY(lck, pids, struct process_id,
- num_pids+1))) {
- DEBUG(0, ("realloc failed\n"));
- break;
- }
- pids = tmp;
- pids[num_pids] = e->pid;
- num_pids += 1;
- }
-
- unbecome_root_uid_only();
-
- data_blob_free(&blob);
- TALLOC_FREE(lck);
-}
-
-void notify_fname(connection_struct *conn, const char *path,
- uint32 filter, uint32 action)
-{
- char *parent;
- const char *name;
-
- if (!parent_dirname_talloc(tmp_talloc_ctx(), path, &parent, &name)) {
- return;
- }
-
- notify_action(conn, parent, name, filter, action);
- TALLOC_FREE(parent);
-}
-
-static void notify_fsp(files_struct *fsp, struct notify_message *msg)
-{
- struct notify_change *change, *changes;
-
- if (fsp->notify == NULL) {
- /*
- * Nobody is waiting, don't queue
- */
- return;
- }
-
- if ((fsp->notify->requests != NULL)
- && (fsp->notify->requests->filter & msg->filter)) {
- /*
- * Someone is waiting for the change, trigger the reply
- * immediately.
- *
- * TODO: do we have to walk the lists of requests pending?
- */
-
- struct notify_change_request *req = fsp->notify->requests;
- struct notify_change onechange;
-
- onechange.action = msg->action;
- onechange.name = msg->name;
-
- change_notify_reply(req->request_buf, req->max_param_count,
- 1, &onechange);
- change_notify_remove_request(req);
- return;
- }
-
- /*
- * Someone has triggered a notify previously, queue the change for
- * later. TODO: Limit the number of changes queued, test how filters
- * apply here. Do we have to store them?
- */
-
- if (!(changes = TALLOC_REALLOC_ARRAY(
- fsp->notify, fsp->notify->changes,
- struct notify_change, 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 (!(change->name = talloc_strdup(changes, msg->name))) {
- DEBUG(0, ("talloc_strdup failed\n"));
- return;
- }
- change->action = msg->action;
- fsp->notify->num_changes += 1;
-
- return;
-}
-
-static void notify_message_callback(int msgtype, struct process_id pid,
- void *buf, size_t len)
-{
- struct notify_message msg;
- files_struct *fsp;
-
- if (!buf_to_notify_message(buf, len, &msg)) {
- return;
- }
-
- DEBUG(10, ("Received notify_message for 0x%x/%.0f: %d\n",
- (unsigned)msg.dev, (double)msg.inode, msg.action));
-
- for(fsp = fsp_find_di_first(msg.dev, msg.inode); fsp;
- fsp = fsp_find_di_next(fsp)) {
- notify_fsp(fsp, &msg);
- }
-}
-
/****************************************************************************
Initialise the change notify subsystem.
****************************************************************************/
return False;
}
- message_register(MSG_SMB_NOTIFY, notify_message_callback);
-
return True;
}
git.samba.org / samba.git / commitdiff