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-rw-r--r--source3/smbd/connection.c225
1 files changed, 70 insertions, 155 deletions
diff --git a/source3/smbd/connection.c b/source3/smbd/connection.c
index 393a3e7372..f88d707983 100644
--- a/source3/smbd/connection.c
+++ b/source3/smbd/connection.c
@@ -27,202 +27,117 @@ extern fstring remote_machine;
extern int DEBUGLEVEL;
/****************************************************************************
-simple routines to do connection counting
+open the connections database
****************************************************************************/
-BOOL yield_connection(connection_struct *conn,char *name,int max_connections)
+TDB_CONTEXT *open_db(char *name)
{
- struct connect_record crec;
pstring fname;
- int fd;
- pid_t mypid = getpid();
- int i;
-
- DEBUG(3,("Yielding connection to %s\n",name));
-
- if (max_connections <= 0)
- return(True);
-
- memset((char *)&crec,'\0',sizeof(crec));
pstrcpy(fname,lp_lockdir());
trim_string(fname,"","/");
-
- pstrcat(fname,"/");
- pstrcat(fname,name);
- pstrcat(fname,".LCK");
-
- fd = sys_open(fname,O_RDWR,0);
- if (fd == -1) {
- DEBUG(2,("Couldn't open lock file %s (%s)\n",fname,strerror(errno)));
- return(False);
+
+ if (!directory_exist(fname,NULL)) {
+ mkdir(fname,0755);
}
+
+ pstrcat(fname,"/connections.tdb");
+
+ return tdb_open(fname, 0, O_RDWR | O_CREAT, 0644);
+}
- if (fcntl_lock(fd,SMB_F_SETLKW,0,1,F_WRLCK)==False) {
- DEBUG(0,("ERROR: can't get lock on %s\n", fname));
- return False;
- }
- /* find the right spot */
- for (i=0;i<max_connections;i++) {
- if (read(fd, &crec,sizeof(crec)) != sizeof(crec)) {
- DEBUG(2,("Entry not found in lock file %s\n",fname));
- if (fcntl_lock(fd,SMB_F_SETLKW,0,1,F_UNLCK)==False) {
- DEBUG(0,("ERROR: can't release lock on %s\n", fname));
- }
- close(fd);
- return(False);
- }
- if (crec.pid == mypid && crec.cnum == conn->cnum)
- break;
- }
- if (crec.pid != mypid || crec.cnum != conn->cnum) {
- if (fcntl_lock(fd,SMB_F_SETLKW,0,1,F_UNLCK)==False) {
- DEBUG(0,("ERROR: can't release lock on %s\n", fname));
- }
- close(fd);
- DEBUG(2,("Entry not found in lock file %s\n",fname));
- return(False);
- }
+/****************************************************************************
+delete a connection record
+****************************************************************************/
+BOOL yield_connection(connection_struct *conn,char *name,int max_connections)
+{
+ struct connections_key key;
+ TDB_DATA kbuf;
+ TDB_CONTEXT *tdb;
- memset((void *)&crec,'\0',sizeof(crec));
-
- /* remove our mark */
- if (sys_lseek(fd,i*sizeof(crec),SEEK_SET) != i*sizeof(crec) ||
- write(fd, &crec,sizeof(crec)) != sizeof(crec)) {
- DEBUG(2,("Couldn't update lock file %s (%s)\n",fname,strerror(errno)));
- if (fcntl_lock(fd,SMB_F_SETLKW,0,1,F_UNLCK)==False) {
- DEBUG(0,("ERROR: can't release lock on %s\n", fname));
- }
- close(fd);
- return(False);
- }
+ if (!(tdb = open_db(name))) return False;
- if (fcntl_lock(fd,SMB_F_SETLKW,0,1,F_UNLCK)==False) {
- DEBUG(0,("ERROR: can't release lock on %s\n", fname));
- }
+ DEBUG(3,("Yielding connection to %s\n",name));
- DEBUG(3,("Yield successful\n"));
+ ZERO_STRUCT(key);
+ key.pid = getpid();
+ if (conn) key.cnum = conn->cnum;
+ fstrcpy(key.name, name);
- close(fd);
+ kbuf.dptr = (char *)&key;
+ kbuf.dsize = sizeof(key);
+
+ tdb_delete(tdb, kbuf);
+ tdb_close(tdb);
return(True);
}
/****************************************************************************
-simple routines to do connection counting
+claim an entry in the connections database
+****************************************************************************/
+int delete_dead(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf)
+{
+ struct connections_key key;
+ memcpy(&key, kbuf.dptr, sizeof(key));
+ if (!process_exists(key.pid)) tdb_delete(tdb, kbuf);
+ return 0;
+}
+
+
+/****************************************************************************
+claim an entry in the connections database
****************************************************************************/
BOOL claim_connection(connection_struct *conn,char *name,int max_connections,BOOL Clear)
{
+ struct connections_key key;
+ struct connections_data crec;
+ TDB_DATA kbuf, dbuf;
+ TDB_CONTEXT *tdb;
extern int Client;
- struct connect_record crec;
- pstring fname;
- int fd=-1;
- int i,foundi= -1;
- int total_recs;
-
+
if (max_connections <= 0)
return(True);
- DEBUG(5,("trying claim %s %s %d\n",lp_lockdir(),name,max_connections));
-
- pstrcpy(fname,lp_lockdir());
- trim_string(fname,"","/");
-
- if (!directory_exist(fname,NULL))
- mkdir(fname,0755);
-
- pstrcat(fname,"/");
- pstrcat(fname,name);
- pstrcat(fname,".LCK");
-
- if (!file_exist(fname,NULL)) {
- fd = sys_open(fname,O_RDWR|O_CREAT|O_EXCL, 0644);
- }
+ if (!(tdb = open_db(name))) return False;
- if (fd == -1) {
- fd = sys_open(fname,O_RDWR,0);
- }
-
- if (fd == -1) {
- DEBUG(1,("couldn't open lock file %s\n",fname));
- return(False);
- }
+ DEBUG(5,("claiming %s %d\n",name,max_connections));
+
+ ZERO_STRUCT(key);
+ key.pid = getpid();
+ key.cnum = conn?conn->cnum:-1;
+ fstrcpy(key.name, name);
+
+ kbuf.dptr = (char *)&key;
+ kbuf.dsize = sizeof(key);
- if (fcntl_lock(fd,SMB_F_SETLKW,0,1,F_WRLCK)==False) {
- DEBUG(0,("ERROR: can't get lock on %s\n", fname));
- return False;
+ if (Clear) {
+ tdb_traverse(tdb, delete_dead);
}
- total_recs = get_file_size(fname) / sizeof(crec);
-
- /* find a free spot */
- for (i=0;i<max_connections;i++) {
- if (i>=total_recs ||
- sys_lseek(fd,i*sizeof(crec),SEEK_SET) != i*sizeof(crec) ||
- read(fd,&crec,sizeof(crec)) != sizeof(crec)) {
- if (foundi < 0) foundi = i;
- break;
- }
-
- if (Clear && crec.pid && !process_exists(crec.pid)) {
- if(sys_lseek(fd,i*sizeof(crec),SEEK_SET) != i*sizeof(crec)) {
- DEBUG(0,("claim_connection: ERROR: sys_lseek failed to seek \
-to %d\n", (int)(i*sizeof(crec)) ));
- continue;
- }
- memset((void *)&crec,'\0',sizeof(crec));
- write(fd, &crec,sizeof(crec));
- if (foundi < 0) foundi = i;
- continue;
- }
- if (foundi < 0 && (!crec.pid || !process_exists(crec.pid))) {
- foundi=i;
- if (!Clear) break;
- }
- }
-
- if (foundi < 0) {
- DEBUG(3,("no free locks in %s\n",fname));
- if (fcntl_lock(fd,SMB_F_SETLKW,0,1,F_UNLCK)==False) {
- DEBUG(0,("ERROR: can't release lock on %s\n", fname));
- }
- close(fd);
- return(False);
- }
-
/* fill in the crec */
- memset((void *)&crec,'\0',sizeof(crec));
+ ZERO_STRUCT(crec);
crec.magic = 0x280267;
crec.pid = getpid();
+ crec.cnum = conn?conn->cnum:-1;
if (conn) {
- crec.cnum = conn->cnum;
crec.uid = conn->uid;
crec.gid = conn->gid;
StrnCpy(crec.name,
lp_servicename(SNUM(conn)),sizeof(crec.name)-1);
- } else {
- crec.cnum = -1;
}
crec.start = time(NULL);
StrnCpy(crec.machine,remote_machine,sizeof(crec.machine)-1);
- StrnCpy(crec.addr,client_addr(Client),sizeof(crec.addr)-1);
-
- /* make our mark */
- if (sys_lseek(fd,foundi*sizeof(crec),SEEK_SET) != foundi*sizeof(crec) ||
- write(fd, &crec,sizeof(crec)) != sizeof(crec)) {
- if (fcntl_lock(fd,SMB_F_SETLKW,0,1,F_UNLCK)==False) {
- DEBUG(0,("ERROR: can't release lock on %s\n", fname));
- }
- close(fd);
- return(False);
- }
+ StrnCpy(crec.addr,conn?conn->client_address:client_addr(Client),sizeof(crec.addr)-1);
- if (fcntl_lock(fd,SMB_F_SETLKW,0,1,F_UNLCK)==False) {
- DEBUG(0,("ERROR: can't release lock on %s\n", fname));
- }
-
- close(fd);
- return(True);
+ dbuf.dptr = (char *)&crec;
+ dbuf.dsize = sizeof(crec);
+
+ if (tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) != 0) return False;
+
+ tdb_close(tdb);
+
+ return True;
}
generated by cgit (git 2.34.1) at 2024-07-11 11:40:59 +0000