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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* dump_fs_locks.c
*
* Interface with the kernel and dump current fs locking state
*
* Copyright (C) 2005, 2008 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License, version 2, as published by the Free Software Foundation.
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*
*/
#define _XOPEN_SOURCE 600 /* Triggers XOPEN2K in features.h */
#define _LARGEFILE64_SOURCE
#define _DEFAULT_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <unistd.h>
#include <limits.h>
#include <linux/types.h>
#include <inttypes.h>
#include <stdio.h>
#include "main.h"
#include "ocfs2/byteorder.h"
#include "ocfs2_internals.h"
static char *level_str(int level)
{
char *s;
switch (level) {
case LKM_IVMODE:
s = "Invalid";
break;
case LKM_NLMODE:
s = "No Lock";
break;
case LKM_CRMODE:
s = "Concurrent Read";
break;
case LKM_CWMODE:
s = "Concurrent Write";
break;
case LKM_PRMODE:
s = "Protected Read";
break;
case LKM_PWMODE:
s = "Protected Write";
break;
case LKM_EXMODE:
s = "Exclusive";
break;
default:
s = "Unknown";
}
return s;
}
static void print_flags(unsigned long flags, FILE *out)
{
if (flags & OCFS2_LOCK_INITIALIZED )
fprintf(out, " Initialized");
if (flags & OCFS2_LOCK_ATTACHED)
fprintf(out, " Attached");
if (flags & OCFS2_LOCK_BUSY)
fprintf(out, " Busy");
if (flags & OCFS2_LOCK_BLOCKED)
fprintf(out, " Blocked");
if (flags & OCFS2_LOCK_LOCAL)
fprintf(out, " Local");
if (flags & OCFS2_LOCK_NEEDS_REFRESH)
fprintf(out, " Needs Refresh");
if (flags & OCFS2_LOCK_REFRESHING)
fprintf(out, " Refreshing");
if (flags & OCFS2_LOCK_FREEING)
fprintf(out, " Freeing");
if (flags & OCFS2_LOCK_QUEUED)
fprintf(out, " Queued");
}
static char *action_str(unsigned int action)
{
char *s;
switch (action) {
case OCFS2_AST_INVALID:
s = "None";
break;
case OCFS2_AST_ATTACH:
s = "Attach";
break;
case OCFS2_AST_CONVERT:
s = "Convert";
break;
case OCFS2_AST_DOWNCONVERT:
s = "Downconvert";
break;
default:
s = "Unknown";
}
return s;
}
static char *unlock_action_str(unsigned int unlock_action)
{
char *s;
switch (unlock_action) {
case OCFS2_UNLOCK_INVALID:
s = "None";
break;
case OCFS2_UNLOCK_CANCEL_CONVERT:
s = "Cancel Convert";
break;
case OCFS2_UNLOCK_DROP_LOCK:
s = "Drop Lock";
break;
default:
s = "Unknown";
}
return s;
}
static void dump_raw_lvb(const char *lvb, FILE *out)
{
int i;
fprintf(out, "Raw LVB:\t");
for(i = 0; i < DLM_LVB_LEN; i++) {
fprintf(out, "%02hhx ", lvb[i]);
if (!((i+1) % 16) && i != (DLM_LVB_LEN-1))
fprintf(out, "\n\t\t");
}
fprintf(out, "\n");
}
static void dump_meta_lvb_v1(struct ocfs2_meta_lvb_v1 *lvb, FILE *out)
{
fprintf(out, "Decoded LVB:\t");
fprintf(out, "Version: %u "
"Clusters: %u "
"Size: %"PRIu64"\n",
be32_to_cpu(lvb->lvb_version),
be32_to_cpu(lvb->lvb_iclusters),
be64_to_cpu(lvb->lvb_isize));
fprintf(out, "\t\tMode: 0%o "
"UID: %u "
"GID: %u "
"Nlink: %u\n",
be16_to_cpu(lvb->lvb_imode),
be32_to_cpu(lvb->lvb_iuid),
be32_to_cpu(lvb->lvb_igid),
be16_to_cpu(lvb->lvb_inlink));
fprintf(out, "\t\tAtime_packed: 0x%"PRIx64"\n"
"\t\tCtime_packed: 0x%"PRIx64"\n"
"\t\tMtime_packed: 0x%"PRIx64"\n",
be64_to_cpu(lvb->lvb_iatime_packed),
be64_to_cpu(lvb->lvb_ictime_packed),
be64_to_cpu(lvb->lvb_imtime_packed));
}
static void dump_meta_lvb_v2(struct ocfs2_meta_lvb_v2 *lvb, FILE *out)
{
fprintf(out, "Decoded LVB:\t");
fprintf(out, "Version: %u "
"Clusters: %u "
"Size: %"PRIu64"\n",
be32_to_cpu(lvb->lvb_version),
be32_to_cpu(lvb->lvb_iclusters),
be64_to_cpu(lvb->lvb_isize));
fprintf(out, "\t\tMode: 0%o "
"UID: %u "
"GID: %u "
"Nlink: %u\n",
be16_to_cpu(lvb->lvb_imode),
be32_to_cpu(lvb->lvb_iuid),
be32_to_cpu(lvb->lvb_igid),
be16_to_cpu(lvb->lvb_inlink));
fprintf(out, "\t\tAtime_packed: 0x%"PRIx64"\n"
"\t\tCtime_packed: 0x%"PRIx64"\n"
"\t\tMtime_packed: 0x%"PRIx64"\n",
be64_to_cpu(lvb->lvb_iatime_packed),
be64_to_cpu(lvb->lvb_ictime_packed),
be64_to_cpu(lvb->lvb_imtime_packed));
}
static void dump_meta_lvb(const char *raw_lvb, FILE *out)
{
struct ocfs2_meta_lvb_v1 *lvb1 = (struct ocfs2_meta_lvb_v1 *) raw_lvb;
struct ocfs2_meta_lvb_v2 *lvb2 = (struct ocfs2_meta_lvb_v2 *) raw_lvb;
if (!lvb1->lvb_old_seq && be32_to_cpu(lvb1->lvb_version) == 1)
dump_meta_lvb_v1(lvb1, out);
else if (be32_to_cpu(lvb2->lvb_version) == 2)
dump_meta_lvb_v2(lvb2, out);
}
/* 0 = eof, > 0 = success, < 0 = error */
static int dump_version_two_and_three(FILE *file, FILE *out, int v3)
{
unsigned long long num_prmode, num_exmode;
unsigned int num_prmode_failed, num_exmode_failed;
unsigned long long total_prmode, total_exmode;
unsigned long long avg_prmode = 0, avg_exmode = 0;
unsigned int max_prmode, max_exmode, num_refresh;
int ret;
#define NSEC_PER_USEC 1000
ret = fscanf(file, "%llu\t"
"%llu\t"
"%u\t"
"%u\t"
"%llu\t"
"%llu\t"
"%u\t"
"%u\t"
"%u",
&num_prmode,
&num_exmode,
&num_prmode_failed,
&num_exmode_failed,
&total_prmode,
&total_exmode,
&max_prmode,
&max_exmode,
&num_refresh);
if (ret != 9) {
ret = -EINVAL;
goto out;
}
if (!v3) {
max_prmode /= NSEC_PER_USEC;
max_exmode /= NSEC_PER_USEC;
}
if (num_prmode)
avg_prmode = total_prmode/num_prmode;
if (num_exmode)
avg_exmode = total_exmode/num_exmode;
fprintf(out, "PR > Gets: %llu Fails: %u Waits Total: %lluus "
"Max: %uus Avg: %lluns\n",
num_prmode, num_prmode_failed, total_prmode/NSEC_PER_USEC,
max_prmode, avg_prmode);
fprintf(out, "EX > Gets: %llu Fails: %u Waits Total: %lluus "
"Max: %uus Avg: %lluns\n",
num_exmode, num_exmode_failed, total_exmode/NSEC_PER_USEC,
max_exmode, avg_exmode);
fprintf(out, "Disk Refreshes: %u\n", num_refresh);
ret = 1;
out:
return ret;
}
/* 0 = eof, > 0 = success, < 0 = error */
static int dump_version_one(FILE *file, FILE *out, int lvbs, int only_busy,
struct list_head *locklist, int *skipped,
unsigned int version)
{
char id[OCFS2_LOCK_ID_MAX_LEN + 1];
char lvb[DLM_LVB_LEN];
int ret, i, level, requested, blocking;
unsigned long flags;
unsigned int action, unlock_action, ro, ex, dummy;
const char *format;
*skipped = 1;
ret = fscanf(file, "%s\t"
"%d\t"
"0x%lx\t"
"0x%x\t"
"0x%x\t"
"%u\t"
"%u\t"
"%d\t"
"%d\t",
id,
&level,
&flags,
&action,
&unlock_action,
&ro,
&ex,
&requested,
&blocking);
if (ret != 9) {
ret = -EINVAL;
goto out;
}
format = "0x%x\t";
for (i = 0; i < DLM_LVB_LEN; i++) {
/* This is the known last part of the record. If we
* include the field delimiting '\t' then fscanf will
* also catch the record delimiting '\n' character,
* which we want to save for the caller to find. */
if ((i == (DLM_LVB_LEN - 1)) && (version < 2))
format = "0x%x";
ret = fscanf(file, format, &dummy);
if (ret != 1) {
ret = -EINVAL;
goto out;
}
lvb[i] = (char) dummy;
}
if (!list_empty(locklist)) {
if (!del_from_stringlist(id, locklist)) {
ret = 1;
goto out;
}
}
if (only_busy) {
if (!(flags & OCFS2_LOCK_BUSY)) {
ret = 1;
goto out;
}
}
fprintf(out, "Lockres: %s Mode: %s\nFlags:", id, level_str(level));
print_flags(flags, out);
fprintf(out, "\nRO Holders: %u EX Holders: %u\n", ro, ex);
fprintf(out, "Pending Action: %s Pending Unlock Action: %s\n",
action_str(action), unlock_action_str(unlock_action));
fprintf(out, "Requested Mode: %s Blocking Mode: %s\n",
level_str(requested), level_str(blocking));
if (lvbs) {
dump_raw_lvb(lvb, out);
if (id[0] == 'M')
dump_meta_lvb(lvb, out);
}
*skipped = 0;
ret = 1;
out:
return ret;
}
static int end_line(FILE *f)
{
int ret;
do {
ret = fgetc(f);
if (ret == EOF)
return 1;
} while (ret != '\n');
return 0;
}
#define CURRENT_PROTO 3
/* returns 0 on error or end of file */
static int dump_one_lockres(FILE *file, FILE *out, int lvbs, int only_busy,
struct list_head *locklist)
{
unsigned int version;
int ret, v3;
int skipped = 0;
ret = fscanf(file, "%x\t", &version);
if (ret != 1)
return 0;
if (version > CURRENT_PROTO) {
fprintf(stdout, "Debug string proto %u found, but %u is the "
"highest I understand.\n", version, CURRENT_PROTO);
return 0;
}
ret = dump_version_one(file, out, lvbs, only_busy, locklist, &skipped, version);
if (ret <= 0)
return 0;
if (!skipped) {
if (version > 1) {
v3 = !!(version == 3);
ret = dump_version_two_and_three(file, out, v3);
if (ret <= 0)
return 0;
}
fprintf(out, "\n");
}
/* Read to the end of the record here. Any new fields tagged
* onto the current format will be silently ignored. */
ret = !end_line(file);
return ret;
}
void dump_fs_locks(char *uuid_str, FILE *out, char *path, int dump_lvbs,
int only_busy, struct list_head *locklist)
{
errcode_t ret;
char debugfs_path[PATH_MAX];
FILE *file;
int show_select;
if (path == NULL) {
ret = get_debugfs_path(debugfs_path, sizeof(debugfs_path));
if (ret) {
fprintf(stderr, "Could not locate debugfs file system. "
"Perhaps it is not mounted?\n");
return;
}
ret = open_debugfs_file(debugfs_path, "ocfs2", uuid_str,
"locking_state", &file);
if (ret) {
fprintf(stderr, "Could not open debug state for "
"\"%s\".\nPerhaps that OCFS2 file system is "
"not mounted?\n", uuid_str);
return;
}
} else {
file = fopen(path, "r");
if (!file) {
fprintf(stderr, "Could not open file at \"%s\"\n",
path);
return;
}
}
show_select = !list_empty(locklist);
while (dump_one_lockres(file, out, dump_lvbs, only_busy, locklist)) {
if (show_select && list_empty(locklist))
break;
}
fclose(file);
}
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