Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 332 insertions, 0 deletions

diff --git a/source3/profile/profile.c b/source3/profile/profile.c
new file mode 100644
index 0000000..0b02e36
--- /dev/null
+++ b/source3/profile/profile.c
@@ -0,0 +1,332 @@
+/*
+   Unix SMB/CIFS implementation.
+   store smbd profiling information in shared memory
+   Copyright (C) Andrew Tridgell 1999
+   Copyright (C) James Peach 2006
+
+   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"
+#include "system/filesys.h"
+#include "system/time.h"
+#include "messages.h"
+#include "smbprofile.h"
+#include "lib/tdb_wrap/tdb_wrap.h"
+#include <tevent.h>
+#include "../lib/crypto/crypto.h"
+
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+
+struct profile_stats *profile_p;
+struct smbprofile_global_state smbprofile_state;
+
+/****************************************************************************
+Set a profiling level.
+****************************************************************************/
+void set_profile_level(int level, const struct server_id *src)
+{
+	SMB_ASSERT(smbprofile_state.internal.db != NULL);
+
+	switch (level) {
+	case 0:		/* turn off profiling */
+		smbprofile_state.config.do_count = false;
+		smbprofile_state.config.do_times = false;
+		DEBUG(1,("INFO: Profiling turned OFF from pid %d\n",
+			 (int)procid_to_pid(src)));
+		break;
+	case 1:		/* turn on counter profiling only */
+		smbprofile_state.config.do_count = true;
+		smbprofile_state.config.do_times = false;
+		DEBUG(1,("INFO: Profiling counts turned ON from pid %d\n",
+			 (int)procid_to_pid(src)));
+		break;
+	case 2:		/* turn on complete profiling */
+		smbprofile_state.config.do_count = true;
+		smbprofile_state.config.do_times = true;
+		DEBUG(1,("INFO: Full profiling turned ON from pid %d\n",
+			 (int)procid_to_pid(src)));
+		break;
+	case 3:		/* reset profile values */
+		ZERO_STRUCT(profile_p->values);
+		tdb_wipe_all(smbprofile_state.internal.db->tdb);
+		DEBUG(1,("INFO: Profiling values cleared from pid %d\n",
+			 (int)procid_to_pid(src)));
+		break;
+	}
+}
+
+/****************************************************************************
+receive a set profile level message
+****************************************************************************/
+static void profile_message(struct messaging_context *msg_ctx,
+			    void *private_data,
+			    uint32_t msg_type,
+			    struct server_id src,
+			    DATA_BLOB *data)
+{
+        int level;
+
+	if (data->length != sizeof(level)) {
+		DEBUG(0, ("got invalid profile message\n"));
+		return;
+	}
+
+	memcpy(&level, data->data, sizeof(level));
+	set_profile_level(level, &src);
+}
+
+/****************************************************************************
+receive a request profile level message
+****************************************************************************/
+static void reqprofile_message(struct messaging_context *msg_ctx,
+			       void *private_data,
+			       uint32_t msg_type,
+			       struct server_id src,
+			       DATA_BLOB *data)
+{
+        int level;
+
+	level = 1;
+	if (smbprofile_state.config.do_count) {
+		level += 2;
+	}
+	if (smbprofile_state.config.do_times) {
+		level += 4;
+	}
+
+	DEBUG(1,("INFO: Received REQ_PROFILELEVEL message from PID %u\n",
+		 (unsigned int)procid_to_pid(&src)));
+	messaging_send_buf(msg_ctx, src, MSG_PROFILELEVEL,
+			   (uint8_t *)&level, sizeof(level));
+}
+
+/*******************************************************************
+  open the profiling shared memory area
+  ******************************************************************/
+bool profile_setup(struct messaging_context *msg_ctx, bool rdonly)
+{
+	char *db_name;
+	bool ok = false;
+	int rc;
+
+	if (smbprofile_state.internal.db != NULL) {
+		return true;
+	}
+
+	db_name = cache_path(talloc_tos(), "smbprofile.tdb");
+	if (db_name == NULL) {
+		return false;
+	}
+
+	smbprofile_state.internal.db = tdb_wrap_open(
+		NULL, db_name, 0,
+		rdonly ? 0 : TDB_CLEAR_IF_FIRST|TDB_MUTEX_LOCKING,
+		O_CREAT | (rdonly ? O_RDONLY : O_RDWR), 0644);
+	TALLOC_FREE(db_name);
+	if (smbprofile_state.internal.db == NULL) {
+		return false;
+	}
+
+	if (msg_ctx != NULL) {
+		messaging_register(msg_ctx, NULL, MSG_PROFILE,
+				   profile_message);
+		messaging_register(msg_ctx, NULL, MSG_REQ_PROFILELEVEL,
+				   reqprofile_message);
+	}
+
+	profile_p = &smbprofile_state.stats.global;
+
+	rc = smbprofile_magic(profile_p, &profile_p->magic);
+	if (rc != 0) {
+		goto out;
+	}
+
+	ok = true;
+out:
+
+	return ok;
+}
+
+void smbprofile_dump_setup(struct tevent_context *ev)
+{
+	TALLOC_FREE(smbprofile_state.internal.te);
+	smbprofile_state.internal.ev = ev;
+}
+
+static void smbprofile_dump_timer(struct tevent_context *ev,
+				  struct tevent_timer *te,
+				  struct timeval current_time,
+				  void *private_data)
+{
+	smbprofile_dump();
+}
+
+void smbprofile_dump_schedule_timer(void)
+{
+	struct timeval tv;
+
+	GetTimeOfDay(&tv);
+	tv.tv_sec += 1;
+
+	smbprofile_state.internal.te = tevent_add_timer(
+				smbprofile_state.internal.ev,
+				smbprofile_state.internal.ev,
+				tv,
+				smbprofile_dump_timer,
+				NULL);
+}
+
+static int profile_stats_parser(TDB_DATA key, TDB_DATA value,
+				void *private_data)
+{
+	struct profile_stats *s = private_data;
+
+	if (value.dsize != sizeof(struct profile_stats)) {
+		*s = (struct profile_stats) {};
+		return 0;
+	}
+
+	memcpy(s, value.dptr, value.dsize);
+	if (s->magic != profile_p->magic) {
+		*s = (struct profile_stats) {};
+		return 0;
+	}
+
+	return 0;
+}
+
+void smbprofile_dump(void)
+{
+	pid_t pid = 0;
+	TDB_DATA key = { .dptr = (uint8_t *)&pid, .dsize = sizeof(pid) };
+	struct profile_stats s = {};
+	int ret;
+#ifdef HAVE_GETRUSAGE
+	struct rusage rself;
+#endif /* HAVE_GETRUSAGE */
+
+	TALLOC_FREE(smbprofile_state.internal.te);
+
+	if (! (smbprofile_state.config.do_count ||
+	       smbprofile_state.config.do_times)) {
+			return;
+	}
+
+	if (smbprofile_state.internal.db == NULL) {
+		return;
+	}
+
+	pid = tevent_cached_getpid();
+
+	ret = tdb_chainlock(smbprofile_state.internal.db->tdb, key);
+	if (ret != 0) {
+		return;
+	}
+
+	tdb_parse_record(smbprofile_state.internal.db->tdb,
+			 key, profile_stats_parser, &s);
+
+	smbprofile_stats_accumulate(profile_p, &s);
+
+#ifdef HAVE_GETRUSAGE
+	ret = getrusage(RUSAGE_SELF, &rself);
+	if (ret != 0) {
+		ZERO_STRUCT(rself);
+	}
+
+	profile_p->values.cpu_user_stats.time =
+		(rself.ru_utime.tv_sec * 1000000) +
+		rself.ru_utime.tv_usec;
+	profile_p->values.cpu_system_stats.time =
+		(rself.ru_stime.tv_sec * 1000000) +
+		rself.ru_stime.tv_usec;
+#endif /* HAVE_GETRUSAGE */
+
+	tdb_store(smbprofile_state.internal.db->tdb, key,
+		  (TDB_DATA) {
+			.dptr = (uint8_t *)profile_p,
+			.dsize = sizeof(*profile_p)
+		  },
+		  0);
+
+	tdb_chainunlock(smbprofile_state.internal.db->tdb, key);
+	ZERO_STRUCT(profile_p->values);
+
+	return;
+}
+
+void smbprofile_cleanup(pid_t pid, pid_t dst)
+{
+	TDB_DATA key = { .dptr = (uint8_t *)&pid, .dsize = sizeof(pid) };
+	struct profile_stats s = {};
+	struct profile_stats acc = {};
+	int ret;
+
+	if (smbprofile_state.internal.db == NULL) {
+		return;
+	}
+
+	ret = tdb_chainlock(smbprofile_state.internal.db->tdb, key);
+	if (ret != 0) {
+		return;
+	}
+	ret = tdb_parse_record(smbprofile_state.internal.db->tdb,
+			       key, profile_stats_parser, &s);
+	if (ret == -1) {
+		tdb_chainunlock(smbprofile_state.internal.db->tdb, key);
+		return;
+	}
+	tdb_delete(smbprofile_state.internal.db->tdb, key);
+	tdb_chainunlock(smbprofile_state.internal.db->tdb, key);
+
+	pid = dst;
+	ret = tdb_chainlock(smbprofile_state.internal.db->tdb, key);
+	if (ret != 0) {
+		return;
+	}
+	tdb_parse_record(smbprofile_state.internal.db->tdb,
+			 key, profile_stats_parser, &acc);
+
+	/*
+	 * We may have to fix the disconnect count
+	 * in case the process died
+	 */
+	s.values.disconnect_stats.count = s.values.connect_stats.count;
+
+	smbprofile_stats_accumulate(&acc, &s);
+
+	acc.magic = profile_p->magic;
+	tdb_store(smbprofile_state.internal.db->tdb, key,
+		  (TDB_DATA) {
+			.dptr = (uint8_t *)&acc,
+			.dsize = sizeof(acc)
+		  },
+		  0);
+
+	tdb_chainunlock(smbprofile_state.internal.db->tdb, key);
+}
+
+void smbprofile_collect(struct profile_stats *stats)
+{
+	if (smbprofile_state.internal.db == NULL) {
+		return;
+	}
+	smbprofile_collect_tdb(smbprofile_state.internal.db->tdb,
+			       profile_p->magic,
+			       stats);
+}