| /* |
| * 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)); |
| } |