/*
|
* ljs.c - List the contents of an journal superblock
|
*
|
* Copyright (C) 1995, 1996, 1997 Theodore Ts'o <tytso@mit.edu>
|
*
|
* %Begin-Header%
|
* This file may be redistributed under the terms of the GNU Library
|
* General Public License, version 2.
|
* %End-Header%
|
*/
|
|
|
#include "config.h"
|
#include <stdio.h>
|
#include <stdlib.h>
|
#include <sys/types.h>
|
#include <string.h>
|
#include <grp.h>
|
#include <pwd.h>
|
#include <time.h>
|
|
#include "ext2fs/ext2_fs.h"
|
#include "ext2fs/ext2fs.h"
|
#include "e2p.h"
|
#include "ext2fs/kernel-jbd.h"
|
|
#ifdef WORDS_BIGENDIAN
|
#define e2p_be32(x) (x)
|
#else
|
static __u32 e2p_swab32(__u32 val)
|
{
|
return ((val>>24) | ((val>>8)&0xFF00) |
|
((val<<8)&0xFF0000) | (val<<24));
|
}
|
|
#define e2p_be32(x) e2p_swab32(x)
|
#endif
|
|
static const char *journal_checksum_type_str(__u8 type)
|
{
|
switch (type) {
|
case JBD2_CRC32C_CHKSUM:
|
return "crc32c";
|
default:
|
return "unknown";
|
}
|
}
|
|
void e2p_list_journal_super(FILE *f, char *journal_sb_buf,
|
int exp_block_size, int flags)
|
{
|
journal_superblock_t *jsb = (journal_superblock_t *) journal_sb_buf;
|
__u32 *mask_ptr, mask, m;
|
unsigned int size;
|
int j, printed = 0;
|
unsigned int i, nr_users;
|
|
fprintf(f, "%s", "Journal features: ");
|
for (i=0, mask_ptr=&jsb->s_feature_compat; i <3; i++,mask_ptr++) {
|
mask = e2p_be32(*mask_ptr);
|
for (j=0,m=1; j < 32; j++, m<<=1) {
|
if (mask & m) {
|
fprintf(f, " %s", e2p_jrnl_feature2string(i, m));
|
printed++;
|
}
|
}
|
}
|
if (printed == 0)
|
fprintf(f, " (none)");
|
fputc('\n', f);
|
fputs("Journal size: ", f);
|
size = (ntohl(jsb->s_blocksize) / 1024) * ntohl(jsb->s_maxlen);
|
if (size < 8192)
|
fprintf(f, "%uk\n", size);
|
else
|
fprintf(f, "%uM\n", size >> 10);
|
nr_users = (unsigned int) ntohl(jsb->s_nr_users);
|
if (exp_block_size != (int) ntohl(jsb->s_blocksize))
|
fprintf(f, "Journal block size: %u\n",
|
(unsigned int)ntohl(jsb->s_blocksize));
|
fprintf(f, "Journal length: %u\n",
|
(unsigned int)ntohl(jsb->s_maxlen));
|
if (ntohl(jsb->s_first) != 1)
|
fprintf(f, "Journal first block: %u\n",
|
(unsigned int)ntohl(jsb->s_first));
|
fprintf(f, "Journal sequence: 0x%08x\n"
|
"Journal start: %u\n",
|
(unsigned int)ntohl(jsb->s_sequence),
|
(unsigned int)ntohl(jsb->s_start));
|
if (nr_users != 1)
|
fprintf(f, "Journal number of users: %u\n", nr_users);
|
if (jsb->s_feature_compat & e2p_be32(JFS_FEATURE_COMPAT_CHECKSUM))
|
fprintf(f, "%s", "Journal checksum type: crc32\n");
|
if ((jsb->s_feature_incompat &
|
e2p_be32(JFS_FEATURE_INCOMPAT_CSUM_V3)) ||
|
(jsb->s_feature_incompat &
|
e2p_be32(JFS_FEATURE_INCOMPAT_CSUM_V2)))
|
fprintf(f, "Journal checksum type: %s\n"
|
"Journal checksum: 0x%08x\n",
|
journal_checksum_type_str(jsb->s_checksum_type),
|
e2p_be32(jsb->s_checksum));
|
if ((nr_users > 1) ||
|
!e2p_is_null_uuid(&jsb->s_users[0])) {
|
for (i=0; i < nr_users && i < JFS_USERS_MAX; i++) {
|
printf(i ? " %s\n"
|
: "Journal users: %s\n",
|
e2p_uuid2str(&jsb->s_users[i * UUID_SIZE]));
|
}
|
}
|
if (jsb->s_errno != 0)
|
fprintf(f, "Journal errno: %d\n",
|
(int) ntohl(jsb->s_errno));
|
}
|
