/* Unix SMB/Netbios implementation. Version 1.9. store smbd profiling information in shared memory Copyright (C) Andrew Tridgell 1999 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 (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. */ #include "includes.h" #include <sys/shm.h> extern int DEBUGLEVEL; #define IPC_PERMS ((SHM_R | SHM_W) | (SHM_R>>3) | (SHM_R>>6)) static int shm_id; static BOOL read_only; struct profile_header *profile_h; struct profile_stats *profile_p; BOOL do_profile_flag = False; BOOL do_profile_times = False; struct timeval profile_starttime; struct timeval profile_endtime; struct timeval profile_starttime_nested; struct timeval profile_endtime_nested; /**************************************************************************** receive a set profile level message ****************************************************************************/ void profile_message(int msg_type, pid_t src, void *buf, size_t len) { int level; memcpy(&level, buf, sizeof(int)); switch (level) { case 0: /* turn off profiling */ do_profile_flag = False; do_profile_times = False; DEBUG(1,("INFO: Profiling turned OFF from pid %d\n", (int)src)); break; case 1: /* turn on counter profiling only */ do_profile_flag = True; do_profile_times = False; DEBUG(1,("INFO: Profiling counts turned ON from pid %d\n", (int)src)); break; case 2: /* turn on complete profiling */ do_profile_flag = True; do_profile_times = True; DEBUG(1,("INFO: Full profiling turned ON from pid %d\n", (int)src)); break; case 3: /* reset profile values */ memset((char *)profile_p, 0, sizeof(*profile_p)); DEBUG(1,("INFO: Profiling values cleared from pid %d\n", (int)src)); break; } } /**************************************************************************** receive a request profile level message ****************************************************************************/ void reqprofile_message(int msg_type, pid_t src, void *buf, size_t len) { int level; #ifdef WITH_PROFILE level = 1 + (do_profile_flag?2:0) + (do_profile_times?4:0); #else level = 0; #endif DEBUG(1,("INFO: Received REQ_PROFILELEVEL message from PID %d\n",src)); message_send_pid(src, MSG_PROFILELEVEL, &level, sizeof(int), True); } /******************************************************************* open the profiling shared memory area ******************************************************************/ BOOL profile_setup(BOOL rdonly) { struct shmid_ds shm_ds; read_only = rdonly; again: /* try to use an existing key */ shm_id = shmget(PROF_SHMEM_KEY, 0, 0); /* if that failed then create one. There is a race condition here if we are running from inetd. Bad luck. */ if (shm_id == -1) { if (read_only) return False; shm_id = shmget(PROF_SHMEM_KEY, sizeof(*profile_h), IPC_CREAT | IPC_EXCL | IPC_PERMS); } if (shm_id == -1) { DEBUG(0,("Can't create or use IPC area. Error was %s\n", strerror(errno))); return False; } profile_h = (struct profile_header *)shmat(shm_id, 0, read_only?SHM_RDONLY:0); if ((long)profile_p == -1) { DEBUG(0,("Can't attach to IPC area. Error was %s\n", strerror(errno))); return False; } /* find out who created this memory area */ if (shmctl(shm_id, IPC_STAT, &shm_ds) != 0) { DEBUG(0,("ERROR shmctl : can't IPC_STAT. Error was %s\n", strerror(errno))); return False; } if (shm_ds.shm_perm.cuid != 0 || shm_ds.shm_perm.cgid != 0) { DEBUG(0,("ERROR: root did not create the shmem\n")); return False; } if (shm_ds.shm_segsz != sizeof(*profile_h)) { DEBUG(0,("WARNING: profile size is %d (expected %d). Deleting\n", (int)shm_ds.shm_segsz, sizeof(*profile_h))); if (shmctl(shm_id, IPC_RMID, &shm_ds) == 0) { goto again; } else { return False; } } if (!read_only && (shm_ds.shm_nattch == 1)) { memset((char *)profile_h, 0, sizeof(*profile_h)); profile_h->prof_shm_magic = PROF_SHM_MAGIC; profile_h->prof_shm_version = PROF_SHM_VERSION; DEBUG(3,("Initialised profile area\n")); } profile_p = &profile_h->stats; message_register(MSG_PROFILE, profile_message); message_register(MSG_REQ_PROFILELEVEL, reqprofile_message); return True; }