-/*
+/*
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 2 of the License, or
+ 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
-/* set these to define the limits of the server. NOTE These are on a
- per-client basis. Thus any one machine can't connect to more than
- MAX_CONNECTIONS services, but any number of machines may connect at
- one time. */
-#define MAX_CONNECTIONS 128
+/* 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.
+ */
-static connection_struct *Connections;
-
-/* number of open connections */
-static struct bitmap *bmap;
-static int num_open;
+#define BITMAP_BLOCK_SZ 128
/****************************************************************************
-init the conn structures
+ Init the conn structures.
****************************************************************************/
-void conn_init(void)
+
+void conn_init(struct smbd_server_connection *sconn)
{
- bmap = bitmap_allocate(MAX_CONNECTIONS);
+ sconn->smb1.tcons.Connections = NULL;
+ sconn->smb1.tcons.bmap = bitmap_talloc(sconn, BITMAP_BLOCK_SZ);
}
/****************************************************************************
-return the number of open connections
+ 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_tcons_open;
}
-
/****************************************************************************
-check if a snum is in use
+ Check if a snum is in use.
****************************************************************************/
-BOOL conn_snum_used(int snum)
+
+bool conn_snum_used(struct smbd_server_connection *sconn,
+ int snum)
{
- connection_struct *conn;
- for (conn=Connections;conn;conn=conn->next) {
- if (conn->service == snum) {
- return(True);
+ if (sconn->using_smb2) {
+ /* SMB2 */
+ struct smbd_smb2_session *sess;
+ for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {
+ struct smbd_smb2_tcon *ptcon;
+
+ for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) {
+ if (ptcon->compat_conn &&
+ ptcon->compat_conn->params &&
+ (ptcon->compat_conn->params->service = snum)) {
+ return true;
+ }
+ }
+ }
+ } else {
+ /* SMB1 */
+ connection_struct *conn;
+ for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next) {
+ if (conn->params->service == snum) {
+ return true;
+ }
}
}
- return(False);
+ return false;
}
-
/****************************************************************************
-find a conn given a cnum
+ Find a conn given a cnum.
****************************************************************************/
-connection_struct *conn_find(unsigned cnum)
-{
- int count=0;
- connection_struct *conn;
- for (conn=Connections;conn;conn=conn->next,count++) {
- if (conn->cnum == cnum) {
- if (count > 10) {
- DLIST_PROMOTE(Connections, conn);
+connection_struct *conn_find(struct smbd_server_connection *sconn,unsigned cnum)
+{
+ if (sconn->using_smb2) {
+ /* SMB2 */
+ struct smbd_smb2_session *sess;
+ for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {
+ struct smbd_smb2_tcon *ptcon;
+
+ for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) {
+ if (ptcon->compat_conn &&
+ ptcon->compat_conn->cnum == cnum) {
+ return ptcon->compat_conn;
+ }
+ }
+ }
+ } else {
+ /* SMB1 */
+ int count=0;
+ connection_struct *conn;
+ for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next,count++) {
+ if (conn->cnum == cnum) {
+ if (count > 10) {
+ DLIST_PROMOTE(sconn->smb1.tcons.Connections,
+ conn);
+ }
+ return conn;
}
- return conn;
}
}
return NULL;
}
-
/****************************************************************************
- 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)
{
connection_struct *conn;
int i;
+ int find_offset = 1;
+
+ if (sconn->using_smb2) {
+ /* SMB2 */
+ if (!(conn=talloc_zero(NULL, connection_struct)) ||
+ !(conn->params = talloc(conn, struct share_params))) {
+ DEBUG(0,("TALLOC_ZERO() failed!\n"));
+ TALLOC_FREE(conn);
+ return NULL;
+ }
+ conn->sconn = sconn;
+ return conn;
+ }
+
+ /* SMB1 */
+find_again:
+ i = bitmap_find(sconn->smb1.tcons.bmap, find_offset);
- i = bitmap_find(bmap, 1);
-
if (i == -1) {
- DEBUG(1,("ERROR! Out of connection structures\n"));
- return NULL;
+ /* Expand the connections bitmap. */
+ int oldsz = sconn->smb1.tcons.bmap->n;
+ int newsz = sconn->smb1.tcons.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_talloc(sconn, newsz);
+ if (!nbmap) {
+ DEBUG(0,("ERROR! malloc fail.\n"));
+ return NULL;
+ }
+
+ bitmap_copy(nbmap, sconn->smb1.tcons.bmap);
+ TALLOC_FREE(sconn->smb1.tcons.bmap);
+
+ sconn->smb1.tcons.bmap = nbmap;
+ find_offset = oldsz; /* Start next search in the new portion. */
+
+ goto find_again;
}
- conn = (connection_struct *)malloc(sizeof(*conn));
- if (!conn) return NULL;
+ /* 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;
+ }
- ZERO_STRUCTP(conn);
+ if (!(conn=talloc_zero(NULL, connection_struct)) ||
+ !(conn->params = talloc(conn, struct share_params))) {
+ DEBUG(0,("TALLOC_ZERO() failed!\n"));
+ TALLOC_FREE(conn);
+ return NULL;
+ }
+ conn->sconn = sconn;
conn->cnum = i;
+ conn->force_group_gid = (gid_t)-1;
- bitmap_set(bmap, i);
+ bitmap_set(sconn->smb1.tcons.bmap, i);
- num_open++;
+ sconn->num_tcons_open++;
- string_set(&conn->user,"");
- string_set(&conn->dirpath,"");
string_set(&conn->connectpath,"");
string_set(&conn->origpath,"");
-
- DLIST_ADD(Connections, conn);
- return conn;
-}
+ DLIST_ADD(sconn->smb1.tcons.Connections, conn);
-/****************************************************************************
-close all conn structures
-****************************************************************************/
-void conn_close_all(void)
-{
- connection_struct *conn, *next;
- for (conn=Connections;conn;conn=next) {
- next=conn->next;
- close_cnum(conn, conn->vuid);
- }
+ return conn;
}
/****************************************************************************
- Idle inactive connections.
+ Clear a vuid out of the connection's vuid cache
****************************************************************************/
-BOOL conn_idle_all(time_t t, int deadtime)
+static void conn_clear_vuid_cache(connection_struct *conn, uint16_t vuid)
{
- pipes_struct *plist = NULL;
- BOOL allidle = True;
- connection_struct *conn, *next;
-
- for (conn=Connections;conn;conn=next) {
- next=conn->next;
- /* close dirptrs on connections that are idle */
- if ((t-conn->lastused) > DPTR_IDLE_TIMEOUT)
- dptr_idlecnum(conn);
-
- if (conn->num_files_open > 0 ||
- (t-conn->lastused)<deadtime)
- allidle = False;
- }
-
- /*
- * Check all pipes for any open handles. We cannot
- * idle with a handle open.
- */
+ int i;
- for (plist = get_first_internal_pipe(); plist; plist = get_next_internal_pipe(plist))
- if (plist->pipe_handles && plist->pipe_handles->count)
- allidle = False;
-
- return allidle;
+ for (i=0; i<VUID_CACHE_SIZE; i++) {
+ struct vuid_cache_entry *ent;
+
+ ent = &conn->vuid_cache.array[i];
+
+ if (ent->vuid == vuid) {
+ ent->vuid = UID_FIELD_INVALID;
+ /*
+ * 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);
+ }
+ ent->read_only = False;
+ }
+ }
}
/****************************************************************************
-clear a vuid out of the validity cache, and as the 'owner' of a connection.
+ 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,uint16_t vuid)
{
connection_struct *conn;
- unsigned int i;
- for (conn=Connections;conn;conn=conn->next) {
- if (conn->vuid == vuid) {
- conn->vuid = UID_FIELD_INVALID;
+ if (sconn->using_smb2) {
+ /* SMB2 */
+ struct smbd_smb2_session *sess;
+ for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {
+ struct smbd_smb2_tcon *ptcon;
+
+ for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) {
+ if (ptcon->compat_conn) {
+ if (ptcon->compat_conn->vuid == vuid) {
+ ptcon->compat_conn->vuid = UID_FIELD_INVALID;
+ }
+ conn_clear_vuid_cache(ptcon->compat_conn, vuid);
+ }
+ }
}
-
- for (i=0;i<conn->vuid_cache.entries && i< VUID_CACHE_SIZE;i++) {
- if (conn->vuid_cache.list[i] == vuid) {
- conn->vuid_cache.list[i] = UID_FIELD_INVALID;
+ } else {
+ /* SMB1 */
+ for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next) {
+ if (conn->vuid == vuid) {
+ conn->vuid = UID_FIELD_INVALID;
}
+ conn_clear_vuid_cache(conn, vuid);
}
}
}
/****************************************************************************
- Free a conn structure.
+ Free a conn structure - internal part.
****************************************************************************/
-void conn_free(connection_struct *conn)
+static void conn_free_internal(connection_struct *conn)
{
- smb_vfs_handle_struct *handle, *thandle;
- void (*done_fptr)(connection_struct *the_conn);
+ vfs_handle_struct *handle = NULL, *thandle = NULL;
+ struct trans_state *state = NULL;
/* Free vfs_connection_struct */
- handle = conn->vfs_private;
+ handle = conn->vfs_handles;
while(handle) {
- /* Close dlopen() handle */
- done_fptr = (void (*)(connection_struct *))sys_dlsym(handle->handle, "vfs_done");
-
- if (done_fptr == NULL) {
- DEBUG(3, ("No vfs_done() symbol found in module with handle %p, ignoring\n", handle->handle));
- } else {
- done_fptr(conn);
- }
- sys_dlclose(handle->handle);
- DLIST_REMOVE(conn->vfs_private, handle);
thandle = handle->next;
- SAFE_FREE(handle);
+ DLIST_REMOVE(conn->vfs_handles, handle);
+ if (handle->free_data)
+ handle->free_data(&handle->data);
handle = thandle;
}
- DLIST_REMOVE(Connections, conn);
-
- if (conn->ngroups && conn->groups) {
- SAFE_FREE(conn->groups);
- conn->ngroups = 0;
+ /* Free any pending transactions stored on this conn. */
+ for (state = conn->pending_trans; state; state = state->next) {
+ /* state->setup is a talloc child of state. */
+ SAFE_FREE(state->param);
+ SAFE_FREE(state->data);
}
free_namearray(conn->veto_list);
free_namearray(conn->hide_list);
free_namearray(conn->veto_oplock_list);
-
- string_free(&conn->user);
- string_free(&conn->dirpath);
+ free_namearray(conn->aio_write_behind_list);
+
string_free(&conn->connectpath);
string_free(&conn->origpath);
- bitmap_clear(bmap, conn->cnum);
- num_open--;
-
ZERO_STRUCTP(conn);
- SAFE_FREE(conn);
+ talloc_destroy(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
+ Free a conn structure.
****************************************************************************/
-void msg_force_tdis(int msg_type, pid_t pid, void *buf, size_t len)
-{
- connection_struct *conn, *next;
- fstring sharename;
- fstrcpy(sharename, buf);
+void conn_free(connection_struct *conn)
+{
+ if (conn->sconn == NULL) {
+ conn_free_internal(conn);
+ return;
+ }
- if (strcmp(sharename, "*") == 0) {
- DEBUG(1,("Forcing close of all shares\n"));
- conn_close_all();
+ if (conn->sconn->using_smb2) {
+ /* SMB2 */
+ conn_free_internal(conn);
return;
}
- for (conn=Connections;conn;conn=next) {
- next=conn->next;
- if (strequal(lp_servicename(conn->service), sharename)) {
- DEBUG(1,("Forcing close of share %s cnum=%d\n",
- sharename, conn->cnum));
- close_cnum(conn, (uint16)-1);
- }
+ /* SMB1 */
+ DLIST_REMOVE(conn->sconn->smb1.tcons.Connections, conn);
+
+ if (conn->sconn->smb1.tcons.bmap != NULL) {
+ /*
+ * Can be NULL for fake connections created by
+ * create_conn_struct()
+ */
+ bitmap_clear(conn->sconn->smb1.tcons.bmap, conn->cnum);
}
+
+ SMB_ASSERT(conn->sconn->num_tcons_open > 0);
+ conn->sconn->num_tcons_open--;
+
+ conn_free_internal(conn);
}
git.samba.org / nivanova / samba-autobuild / .git / blobdiff