-/*
+/*
Unix SMB/CIFS implementation.
Manage connections_struct structures
Copyright (C) Andrew Tridgell 1998
Copyright (C) Alexander Bokovoy 2002
-
+ Copyright (C) Jeremy Allison 2010
+
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"
-
-/* The connections bitmap is expanded in increments of BITMAP_BLOCK_SZ. The
- * maximum size of the bitmap is the largest positive integer, but you will hit
- * the "max connections" limit, looong before that.
- */
-#define BITMAP_BLOCK_SZ 128
-
-static connection_struct *Connections;
-
-/* number of open connections */
-static struct bitmap *bmap;
-static int num_open;
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "lib/util/bitmap.h"
/****************************************************************************
-init the conn structures
+ Return the number of open connections.
****************************************************************************/
-void conn_init(void)
-{
- bmap = bitmap_allocate(BITMAP_BLOCK_SZ);
-}
-/****************************************************************************
-return the number of open connections
-****************************************************************************/
-int conn_num_open(void)
+int conn_num_open(struct smbd_server_connection *sconn)
{
- return num_open;
+ return sconn->num_connections;
}
-
/****************************************************************************
-check if a snum is in use
+ Check if a snum is in use.
****************************************************************************/
-BOOL conn_snum_used(int snum)
-{
- connection_struct *conn;
- for (conn=Connections;conn;conn=conn->next) {
- if (conn->params->service == snum) {
- return(True);
- }
- }
- return(False);
-}
-
-/****************************************************************************
-find a conn given a cnum
-****************************************************************************/
-connection_struct *conn_find(unsigned cnum)
+bool conn_snum_used(struct smbd_server_connection *sconn,
+ int snum)
{
- int count=0;
- connection_struct *conn;
+ struct connection_struct *conn;
- for (conn=Connections;conn;conn=conn->next,count++) {
- if (conn->cnum == cnum) {
- if (count > 10) {
- DLIST_PROMOTE(Connections, conn);
- }
- return conn;
+ for (conn=sconn->connections; conn; conn=conn->next) {
+ if (conn->params->service == snum) {
+ return true;
}
}
- return NULL;
+ return false;
}
-
/****************************************************************************
- find first available connection slot, starting from a random position.
-The randomisation stops problems with the server dieing and clients
-thinking the server is still available.
+ Find first available connection slot, starting from a random position.
+ The randomisation stops problems with the server dieing and clients
+ thinking the server is still available.
****************************************************************************/
-connection_struct *conn_new(void)
+
+connection_struct *conn_new(struct smbd_server_connection *sconn)
{
- TALLOC_CTX *mem_ctx;
connection_struct *conn;
- int i;
- int find_offset = 1;
-
-find_again:
- i = bitmap_find(bmap, find_offset);
-
- if (i == -1) {
- /* Expand the connections bitmap. */
- int oldsz = bmap->n;
- int newsz = bmap->n + BITMAP_BLOCK_SZ;
- struct bitmap * nbmap;
-
- if (newsz <= oldsz) {
- /* Integer wrap. */
- DEBUG(0,("ERROR! Out of connection structures\n"));
- return NULL;
- }
-
- DEBUG(4,("resizing connections bitmap from %d to %d\n",
- oldsz, newsz));
-
- nbmap = bitmap_allocate(newsz);
- if (!nbmap) {
- DEBUG(0,("ERROR! malloc fail.\n"));
- return NULL;
- }
-
- bitmap_copy(nbmap, bmap);
- bitmap_free(bmap);
- bmap = nbmap;
- find_offset = oldsz; /* Start next search in the new portion. */
-
- goto find_again;
- }
-
- /* The bitmap position is used below as the connection number
- * conn->cnum). This ends up as the TID field in the SMB header,
- * which is limited to 16 bits (we skip 0xffff which is the
- * NULL TID).
- */
- if (i > 65534) {
- DEBUG(0, ("Maximum connection limit reached\n"));
- return NULL;
- }
-
- if ((mem_ctx=talloc_init("connection_struct"))==NULL) {
- DEBUG(0,("talloc_init(connection_struct) failed!\n"));
- return NULL;
- }
-
- if (!(conn=TALLOC_ZERO_P(mem_ctx, connection_struct)) ||
- !(conn->params = TALLOC_P(mem_ctx, struct share_params))) {
+ if (!(conn=talloc_zero(NULL, connection_struct)) ||
+ !(conn->params = talloc(conn, struct share_params)) ||
+ !(conn->vuid_cache = talloc_zero(conn, struct vuid_cache)) ||
+ !(conn->connectpath = talloc_strdup(conn, "")) ||
+ !(conn->origpath = talloc_strdup(conn, ""))) {
DEBUG(0,("TALLOC_ZERO() failed!\n"));
- TALLOC_FREE(mem_ctx);
+ TALLOC_FREE(conn);
return NULL;
}
- conn->mem_ctx = mem_ctx;
- conn->cnum = i;
-
- bitmap_set(bmap, i);
-
- num_open++;
+ conn->sconn = sconn;
+ conn->force_group_gid = (gid_t)-1;
- string_set(&conn->user,"");
- string_set(&conn->dirpath,"");
- string_set(&conn->connectpath,"");
- string_set(&conn->origpath,"");
-
- DLIST_ADD(Connections, conn);
+ DLIST_ADD(sconn->connections, conn);
+ sconn->num_connections++;
return conn;
}
/****************************************************************************
- Close all conn structures.
+ Clear a vuid out of the connection's vuid cache
****************************************************************************/
-void conn_close_all(void)
+static void conn_clear_vuid_cache(connection_struct *conn, uint64_t vuid)
{
- connection_struct *conn, *next;
- for (conn=Connections;conn;conn=next) {
- next=conn->next;
- set_current_service(conn, 0, True);
- close_cnum(conn, conn->vuid);
- }
-}
-
-/****************************************************************************
- Idle inactive connections.
-****************************************************************************/
-
-BOOL conn_idle_all(time_t t)
-{
- int deadtime = lp_deadtime()*60;
- pipes_struct *plist = NULL;
- connection_struct *conn;
-
- if (deadtime <= 0)
- deadtime = DEFAULT_SMBD_TIMEOUT;
-
- for (conn=Connections;conn;conn=conn->next) {
+ int i;
- time_t age = t - conn->lastused;
+ for (i=0; i<VUID_CACHE_SIZE; i++) {
+ struct vuid_cache_entry *ent;
- /* Update if connection wasn't idle. */
- if (conn->lastused != conn->lastused_count) {
- conn->lastused = t;
- conn->lastused_count = t;
- }
+ ent = &conn->vuid_cache->array[i];
- /* close dirptrs on connections that are idle */
- if (age > DPTR_IDLE_TIMEOUT) {
- dptr_idlecnum(conn);
- }
+ if (ent->vuid == vuid) {
+ ent->vuid = UID_FIELD_INVALID;
- if (conn->num_files_open > 0 || age < deadtime) {
- return False;
- }
- }
-
- /*
- * Check all pipes for any open handles. We cannot
- * idle with a handle open.
- */
+ if (conn->user_ev_ctx == ent->user_ev_ctx) {
+ conn->user_ev_ctx = NULL;
+ }
+ TALLOC_FREE(ent->user_ev_ctx);
+
+ /*
+ * We need to keep conn->session_info around
+ * if it's equal to ent->session_info as a SMBulogoff
+ * is often followed by a SMBtdis (with an invalid
+ * vuid). The debug code (or regular code in
+ * vfs_full_audit) wants to refer to the
+ * conn->session_info pointer to print debug
+ * statements. Theoretically this is a bug,
+ * as once the vuid is gone the session_info
+ * on the conn struct isn't valid any more,
+ * but there's enough code that assumes
+ * conn->session_info is never null that
+ * it's easier to hold onto the old pointer
+ * until we get a new sessionsetupX.
+ * As everything is hung off the
+ * conn pointer as a talloc context we're not
+ * leaking memory here. See bug #6315. JRA.
+ */
+ if (conn->session_info == ent->session_info) {
+ ent->session_info = NULL;
+ } else {
+ TALLOC_FREE(ent->session_info);
+ }
- for (plist = get_first_internal_pipe(); plist;
- plist = get_next_internal_pipe(plist)) {
- if (plist->pipe_handles && plist->pipe_handles->count) {
- return False;
+ ent->read_only = False;
+ ent->share_access = 0;
}
}
-
- return True;
}
/****************************************************************************
Clear a vuid out of the validity cache, and as the 'owner' of a connection.
+
+ Called from invalidate_vuid()
****************************************************************************/
-void conn_clear_vuid_cache(uint16 vuid)
+void conn_clear_vuid_caches(struct smbd_server_connection *sconn, uint64_t vuid)
{
connection_struct *conn;
- unsigned int i;
- for (conn=Connections;conn;conn=conn->next) {
+ for (conn=sconn->connections; conn;conn=conn->next) {
if (conn->vuid == vuid) {
conn->vuid = UID_FIELD_INVALID;
}
-
- for (i=0;i<conn->vuid_cache.entries && i< VUID_CACHE_SIZE;i++) {
- if (conn->vuid_cache.array[i].vuid == vuid) {
- struct vuid_cache_entry *ent = &conn->vuid_cache.array[i];
- ent->vuid = UID_FIELD_INVALID;
- ent->read_only = False;
- ent->admin_user = False;
- }
- }
+ conn_clear_vuid_cache(conn, vuid);
}
}
Free a conn structure - internal part.
****************************************************************************/
-void conn_free_internal(connection_struct *conn)
+static void conn_free_internal(connection_struct *conn)
{
- vfs_handle_struct *handle = NULL, *thandle = NULL;
- TALLOC_CTX *mem_ctx = NULL;
+ vfs_handle_struct *handle = NULL, *thandle = NULL;
struct trans_state *state = NULL;
/* Free vfs_connection_struct */
handle = conn->vfs_handles;
while(handle) {
- DLIST_REMOVE(conn->vfs_handles, handle);
thandle = handle->next;
+ DLIST_REMOVE(conn->vfs_handles, handle);
if (handle->free_data)
handle->free_data(&handle->data);
handle = thandle;
free_namearray(conn->veto_list);
free_namearray(conn->hide_list);
free_namearray(conn->veto_oplock_list);
-
- string_free(&conn->user);
- string_free(&conn->dirpath);
- string_free(&conn->connectpath);
- string_free(&conn->origpath);
+ free_namearray(conn->aio_write_behind_list);
- mem_ctx = conn->mem_ctx;
ZERO_STRUCTP(conn);
- talloc_destroy(mem_ctx);
+ talloc_destroy(conn);
}
/****************************************************************************
void conn_free(connection_struct *conn)
{
- DLIST_REMOVE(Connections, conn);
-
- bitmap_clear(bmap, conn->cnum);
-
- SMB_ASSERT(num_open > 0);
- num_open--;
-
- conn_free_internal(conn);
-}
-
-/****************************************************************************
-receive a smbcontrol message to forcibly unmount a share
-the message contains just a share name and all instances of that
-share are unmounted
-the special sharename '*' forces unmount of all shares
-****************************************************************************/
-void msg_force_tdis(struct messaging_context *msg,
- void *private_data,
- uint32_t msg_type,
- struct server_id server_id,
- DATA_BLOB *data)
-{
- connection_struct *conn, *next;
- fstring sharename;
-
- fstrcpy(sharename, (const char *)data->data);
-
- if (strcmp(sharename, "*") == 0) {
- DEBUG(1,("Forcing close of all shares\n"));
- conn_close_all();
+ if (conn->sconn == NULL) {
+ conn_free_internal(conn);
return;
}
- for (conn=Connections;conn;conn=next) {
- next=conn->next;
- if (strequal(lp_servicename(SNUM(conn)), sharename)) {
- DEBUG(1,("Forcing close of share %s cnum=%d\n",
- sharename, conn->cnum));
- close_cnum(conn, (uint16)-1);
- }
- }
+ DLIST_REMOVE(conn->sconn->connections, conn);
+ SMB_ASSERT(conn->sconn->num_connections > 0);
+ conn->sconn->num_connections--;
+
+ conn_free_internal(conn);
}
git.samba.org / samba.git / blobdiff