135 lines
3.8 KiB
C
135 lines
3.8 KiB
C
/*
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* ljs.c - List the contents of an journal superblock
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*
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* Copyright (C) 1995, 1996, 1997 Theodore Ts'o <tytso@mit.edu>
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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* %End-Header%
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <string.h>
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#include <grp.h>
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#include <pwd.h>
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#include <time.h>
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#include "ext2fs/ext2_fs.h"
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#include "ext2fs/ext2fs.h"
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#include "e2p.h"
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#include "ext2fs/kernel-jbd.h"
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#ifdef WORDS_BIGENDIAN
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#define e2p_be32(x) (x)
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#else
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static __u32 e2p_swab32(__u32 val)
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{
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return ((val>>24) | ((val>>8)&0xFF00) |
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((val<<8)&0xFF0000) | (val<<24));
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}
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#define e2p_be32(x) e2p_swab32(x)
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#endif
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/*
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* This function is copied from kernel-jbd.h's function
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* jbd2_journal_get_num_fc_blks() to avoid inter-library dependencies.
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*/
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static inline int get_num_fc_blks(journal_superblock_t *jsb)
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{
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int num_fc_blocks = e2p_be32(jsb->s_num_fc_blks);
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return num_fc_blocks ? num_fc_blocks : JBD2_DEFAULT_FAST_COMMIT_BLOCKS;
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}
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static const char *journal_checksum_type_str(__u8 type)
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{
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switch (type) {
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case JBD2_CRC32C_CHKSUM:
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return "crc32c";
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default:
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return "unknown";
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}
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}
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void e2p_list_journal_super(FILE *f, char *journal_sb_buf,
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int exp_block_size, int flags)
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{
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journal_superblock_t *jsb = (journal_superblock_t *) journal_sb_buf;
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__u32 *mask_ptr, mask, m;
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unsigned int size;
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int j, printed = 0;
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unsigned int i, nr_users;
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int num_fc_blks = 0;
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int journal_blks = 0;
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if (flags & E2P_LIST_JOURNAL_FLAG_FC)
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num_fc_blks = get_num_fc_blks((journal_superblock_t *)journal_sb_buf);
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journal_blks = ntohl(jsb->s_maxlen) - num_fc_blks;
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fprintf(f, "%s", "Journal features: ");
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for (i=0, mask_ptr=&jsb->s_feature_compat; i <3; i++,mask_ptr++) {
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mask = e2p_be32(*mask_ptr);
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for (j=0,m=1; j < 32; j++, m<<=1) {
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if (mask & m) {
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fprintf(f, " %s", e2p_jrnl_feature2string(i, m));
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printed++;
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}
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}
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}
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if (printed == 0)
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fprintf(f, " (none)");
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fputc('\n', f);
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fputs("Total journal size: ", f);
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size = (ntohl(jsb->s_blocksize) / 1024) * ntohl(jsb->s_maxlen);
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if (size < 8192)
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fprintf(f, "%uk\n", size);
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else
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fprintf(f, "%uM\n", size >> 10);
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nr_users = (unsigned int) ntohl(jsb->s_nr_users);
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if (exp_block_size != (int) ntohl(jsb->s_blocksize))
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fprintf(f, "Journal block size: %u\n",
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(unsigned int)ntohl(jsb->s_blocksize));
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fprintf(f, "Total journal blocks: %u\n",
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(unsigned int)(journal_blks + num_fc_blks));
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fprintf(f, "Max transaction length: %u\n",
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(unsigned int)journal_blks);
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fprintf(f, "Fast commit length: %u\n",
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(unsigned int)num_fc_blks);
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if (ntohl(jsb->s_first) != 1)
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fprintf(f, "Journal first block: %u\n",
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(unsigned int)ntohl(jsb->s_first));
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fprintf(f, "Journal sequence: 0x%08x\n"
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"Journal start: %u\n",
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(unsigned int)ntohl(jsb->s_sequence),
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(unsigned int)ntohl(jsb->s_start));
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if (nr_users != 1)
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fprintf(f, "Journal number of users: %u\n", nr_users);
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if (jsb->s_feature_compat & e2p_be32(JBD2_FEATURE_COMPAT_CHECKSUM))
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fprintf(f, "%s", "Journal checksum type: crc32\n");
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if ((jsb->s_feature_incompat &
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e2p_be32(JBD2_FEATURE_INCOMPAT_CSUM_V3)) ||
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(jsb->s_feature_incompat &
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e2p_be32(JBD2_FEATURE_INCOMPAT_CSUM_V2)))
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fprintf(f, "Journal checksum type: %s\n"
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"Journal checksum: 0x%08x\n",
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journal_checksum_type_str(jsb->s_checksum_type),
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e2p_be32(jsb->s_checksum));
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if ((nr_users > 1) ||
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!e2p_is_null_uuid(&jsb->s_users[0])) {
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for (i=0; i < nr_users && i < JBD2_USERS_MAX; i++) {
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printf(i ? " %s\n"
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: "Journal users: %s\n",
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e2p_uuid2str(&jsb->s_users[i * UUID_SIZE]));
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}
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}
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if (jsb->s_errno != 0)
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fprintf(f, "Journal errno: %d\n",
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(int) ntohl(jsb->s_errno));
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}
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