Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 1 | /* |
| 2 | * mkjournal.c --- make a journal for a filesystem |
| 3 | * |
| 4 | * Copyright (C) 2000 Theodore Ts'o. |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 5 | * |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 6 | * %Begin-Header% |
Theodore Ts'o | 543547a | 2010-05-17 21:31:56 -0400 | [diff] [blame] | 7 | * This file may be redistributed under the terms of the GNU Library |
| 8 | * General Public License, version 2. |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 9 | * %End-Header% |
| 10 | */ |
| 11 | |
Theodore Ts'o | d1154eb | 2011-09-18 17:34:37 -0400 | [diff] [blame] | 12 | #include "config.h" |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 13 | #include <stdio.h> |
| 14 | #include <string.h> |
| 15 | #if HAVE_UNISTD_H |
| 16 | #include <unistd.h> |
| 17 | #endif |
| 18 | #if HAVE_ERRNO_H |
| 19 | #include <errno.h> |
| 20 | #endif |
| 21 | #include <fcntl.h> |
| 22 | #include <time.h> |
| 23 | #if HAVE_SYS_STAT_H |
| 24 | #include <sys/stat.h> |
| 25 | #endif |
| 26 | #if HAVE_SYS_TYPES_H |
| 27 | #include <sys/types.h> |
| 28 | #endif |
Theodore Ts'o | 349a484 | 2001-06-11 00:49:29 +0000 | [diff] [blame] | 29 | #if HAVE_SYS_IOCTL_H |
| 30 | #include <sys/ioctl.h> |
| 31 | #endif |
Theodore Ts'o | 17ee8b1 | 2000-10-26 20:45:58 +0000 | [diff] [blame] | 32 | #if HAVE_NETINET_IN_H |
| 33 | #include <netinet/in.h> |
| 34 | #endif |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 35 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 36 | #include "ext2_fs.h" |
Theodore Ts'o | cdaf1fa | 2001-01-05 22:23:22 +0000 | [diff] [blame] | 37 | #include "e2p/e2p.h" |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 38 | #include "ext2fs.h" |
Theodore Ts'o | 5861873 | 2000-12-09 05:47:45 +0000 | [diff] [blame] | 39 | #include "jfs_user.h" |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 40 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 41 | /* |
| 42 | * This function automatically sets up the journal superblock and |
| 43 | * returns it as an allocated block. |
| 44 | */ |
| 45 | errcode_t ext2fs_create_journal_superblock(ext2_filsys fs, |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 46 | __u32 num_blocks, int flags, |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 47 | char **ret_jsb) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 48 | { |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 49 | errcode_t retval; |
| 50 | journal_superblock_t *jsb; |
Theodore Ts'o | 0360394 | 2001-04-17 00:53:25 +0000 | [diff] [blame] | 51 | |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 52 | if (num_blocks < 1024) |
Theodore Ts'o | 0360394 | 2001-04-17 00:53:25 +0000 | [diff] [blame] | 53 | return EXT2_ET_JOURNAL_TOO_SMALL; |
| 54 | |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 55 | if ((retval = ext2fs_get_mem(fs->blocksize, &jsb))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 56 | return retval; |
| 57 | |
| 58 | memset (jsb, 0, fs->blocksize); |
Theodore Ts'o | 5861873 | 2000-12-09 05:47:45 +0000 | [diff] [blame] | 59 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 60 | jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER); |
Theodore Ts'o | 4e24670 | 2000-12-09 14:39:16 +0000 | [diff] [blame] | 61 | if (flags & EXT2_MKJOURNAL_V1_SUPER) |
| 62 | jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V1); |
| 63 | else |
| 64 | jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2); |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 65 | jsb->s_blocksize = htonl(fs->blocksize); |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 66 | jsb->s_maxlen = htonl(num_blocks); |
Theodore Ts'o | d23042a | 2001-02-08 03:37:16 +0000 | [diff] [blame] | 67 | jsb->s_nr_users = htonl(1); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 68 | jsb->s_first = htonl(1); |
| 69 | jsb->s_sequence = htonl(1); |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 70 | memcpy(jsb->s_uuid, fs->super->s_uuid, sizeof(fs->super->s_uuid)); |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 71 | /* |
Theodore Ts'o | d23042a | 2001-02-08 03:37:16 +0000 | [diff] [blame] | 72 | * If we're creating an external journal device, we need to |
| 73 | * adjust these fields. |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 74 | */ |
| 75 | if (fs->super->s_feature_incompat & |
Theodore Ts'o | 4e40f6c | 2001-07-27 23:33:40 -0400 | [diff] [blame] | 76 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 77 | jsb->s_nr_users = 0; |
Theodore Ts'o | 4e40f6c | 2001-07-27 23:33:40 -0400 | [diff] [blame] | 78 | if (fs->blocksize == 1024) |
| 79 | jsb->s_first = htonl(3); |
| 80 | else |
| 81 | jsb->s_first = htonl(2); |
| 82 | } |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 83 | |
| 84 | *ret_jsb = (char *) jsb; |
| 85 | return 0; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 86 | } |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 87 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 88 | /* |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 89 | * This function writes a journal using POSIX routines. It is used |
| 90 | * for creating external journals and creating journals on live |
| 91 | * filesystems. |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 92 | */ |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 93 | static errcode_t write_journal_file(ext2_filsys fs, char *filename, |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 94 | blk_t num_blocks, int flags) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 95 | { |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 96 | errcode_t retval; |
| 97 | char *buf = 0; |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 98 | int fd, ret_size; |
| 99 | blk_t i; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 100 | |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 101 | if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags, |
| 102 | &buf))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 103 | return retval; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 104 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 105 | /* Open the device or journal file */ |
| 106 | if ((fd = open(filename, O_WRONLY)) < 0) { |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 107 | retval = errno; |
Andreas Dilger | 6c54689 | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 108 | goto errfree; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | /* Write the superblock out */ |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 112 | retval = EXT2_ET_SHORT_WRITE; |
| 113 | ret_size = write(fd, buf, fs->blocksize); |
| 114 | if (ret_size < 0) { |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 115 | retval = errno; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 116 | goto errout; |
| 117 | } |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 118 | if (ret_size != (int) fs->blocksize) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 119 | goto errout; |
| 120 | memset(buf, 0, fs->blocksize); |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 121 | |
Andreas Dilger | 6c54689 | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 122 | if (flags & EXT2_MKJOURNAL_LAZYINIT) |
| 123 | goto success; |
| 124 | |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 125 | for (i = 1; i < num_blocks; i++) { |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 126 | ret_size = write(fd, buf, fs->blocksize); |
| 127 | if (ret_size < 0) { |
| 128 | retval = errno; |
| 129 | goto errout; |
| 130 | } |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 131 | if (ret_size != (int) fs->blocksize) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 132 | goto errout; |
| 133 | } |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 134 | |
Andreas Dilger | 6c54689 | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 135 | success: |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 136 | retval = 0; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 137 | errout: |
Andreas Dilger | 6c54689 | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 138 | close(fd); |
| 139 | errfree: |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 140 | ext2fs_free_mem(&buf); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 141 | return retval; |
| 142 | } |
| 143 | |
| 144 | /* |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 145 | * Convenience function which zeros out _num_ blocks starting at |
| 146 | * _blk_. In case of an error, the details of the error is returned |
| 147 | * via _ret_blk_ and _ret_count_ if they are non-NULL pointers. |
| 148 | * Returns 0 on success, and an error code on an error. |
| 149 | * |
| 150 | * As a special case, if the first argument is NULL, then it will |
| 151 | * attempt to free the static zeroizing buffer. (This is to keep |
| 152 | * programs that check for memory leaks happy.) |
| 153 | */ |
| 154 | #define STRIDE_LENGTH 8 |
Jose R. Santos | 73d0c4c | 2009-06-01 16:15:40 -0400 | [diff] [blame] | 155 | errcode_t ext2fs_zero_blocks2(ext2_filsys fs, blk64_t blk, int num, |
| 156 | blk64_t *ret_blk, int *ret_count) |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 157 | { |
| 158 | int j, count; |
| 159 | static char *buf; |
| 160 | errcode_t retval; |
| 161 | |
| 162 | /* If fs is null, clean up the static buffer and return */ |
| 163 | if (!fs) { |
| 164 | if (buf) { |
| 165 | free(buf); |
| 166 | buf = 0; |
| 167 | } |
| 168 | return 0; |
| 169 | } |
| 170 | /* Allocate the zeroizing buffer if necessary */ |
| 171 | if (!buf) { |
| 172 | buf = malloc(fs->blocksize * STRIDE_LENGTH); |
| 173 | if (!buf) |
| 174 | return ENOMEM; |
| 175 | memset(buf, 0, fs->blocksize * STRIDE_LENGTH); |
| 176 | } |
| 177 | /* OK, do the write loop */ |
| 178 | j=0; |
| 179 | while (j < num) { |
Theodore Ts'o | bc507e3 | 2008-06-17 00:18:58 -0400 | [diff] [blame] | 180 | if (blk % STRIDE_LENGTH) { |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 181 | count = STRIDE_LENGTH - (blk % STRIDE_LENGTH); |
Theodore Ts'o | bc507e3 | 2008-06-17 00:18:58 -0400 | [diff] [blame] | 182 | if (count > (num - j)) |
| 183 | count = num - j; |
| 184 | } else { |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 185 | count = num - j; |
| 186 | if (count > STRIDE_LENGTH) |
| 187 | count = STRIDE_LENGTH; |
| 188 | } |
Jose R. Santos | 73d0c4c | 2009-06-01 16:15:40 -0400 | [diff] [blame] | 189 | retval = io_channel_write_blk64(fs->io, blk, count, buf); |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 190 | if (retval) { |
| 191 | if (ret_count) |
| 192 | *ret_count = count; |
| 193 | if (ret_blk) |
| 194 | *ret_blk = blk; |
| 195 | return retval; |
| 196 | } |
| 197 | j += count; blk += count; |
| 198 | } |
| 199 | return 0; |
| 200 | } |
| 201 | |
Jose R. Santos | 73d0c4c | 2009-06-01 16:15:40 -0400 | [diff] [blame] | 202 | errcode_t ext2fs_zero_blocks(ext2_filsys fs, blk_t blk, int num, |
| 203 | blk_t *ret_blk, int *ret_count) |
| 204 | { |
| 205 | blk64_t ret_blk2; |
| 206 | errcode_t retval; |
| 207 | |
| 208 | retval = ext2fs_zero_blocks2(fs, blk, num, &ret_blk2, ret_count); |
| 209 | if (retval) |
| 210 | *ret_blk = (blk_t) ret_blk2; |
| 211 | return retval; |
| 212 | } |
| 213 | |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 214 | /* |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 215 | * Helper function for creating the journal using direct I/O routines |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 216 | */ |
| 217 | struct mkjournal_struct { |
| 218 | int num_blocks; |
| 219 | int newblocks; |
Valerie Aurora Henson | 6d8b37f | 2010-06-13 11:00:00 -0400 | [diff] [blame] | 220 | blk64_t goal; |
| 221 | blk64_t blk_to_zero; |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 222 | int zero_count; |
Andreas Dilger | 6c54689 | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 223 | int flags; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 224 | char *buf; |
| 225 | errcode_t err; |
| 226 | }; |
| 227 | |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 228 | static int mkjournal_proc(ext2_filsys fs, |
Valerie Aurora Henson | 6d8b37f | 2010-06-13 11:00:00 -0400 | [diff] [blame] | 229 | blk64_t *blocknr, |
| 230 | e2_blkcnt_t blockcnt, |
| 231 | blk64_t ref_block EXT2FS_ATTR((unused)), |
| 232 | int ref_offset EXT2FS_ATTR((unused)), |
| 233 | void *priv_data) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 234 | { |
| 235 | struct mkjournal_struct *es = (struct mkjournal_struct *) priv_data; |
Valerie Aurora Henson | 6d8b37f | 2010-06-13 11:00:00 -0400 | [diff] [blame] | 236 | blk64_t new_blk; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 237 | errcode_t retval; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 238 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 239 | if (*blocknr) { |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 240 | es->goal = *blocknr; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 241 | return 0; |
| 242 | } |
Theodore Ts'o | 4a2a9b7 | 2011-06-10 18:54:53 -0400 | [diff] [blame] | 243 | if (blockcnt && |
| 244 | (EXT2FS_B2C(fs, es->goal) == EXT2FS_B2C(fs, es->goal+1))) |
| 245 | new_blk = es->goal+1; |
| 246 | else { |
| 247 | es->goal &= ~EXT2FS_CLUSTER_MASK(fs); |
| 248 | retval = ext2fs_new_block2(fs, es->goal, 0, &new_blk); |
| 249 | if (retval) { |
| 250 | es->err = retval; |
| 251 | return BLOCK_ABORT; |
| 252 | } |
Theodore Ts'o | b2e6c86 | 2011-06-16 10:12:43 -0400 | [diff] [blame] | 253 | es->newblocks++; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 254 | } |
Theodore Ts'o | 674c0cc | 2008-08-27 16:23:30 -0400 | [diff] [blame] | 255 | if (blockcnt >= 0) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 256 | es->num_blocks--; |
| 257 | |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 258 | retval = 0; |
| 259 | if (blockcnt <= 0) |
Valerie Aurora Henson | 24a117a | 2009-09-07 21:14:24 -0400 | [diff] [blame] | 260 | retval = io_channel_write_blk64(fs->io, new_blk, 1, es->buf); |
Andreas Dilger | 6c54689 | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 261 | else if (!(es->flags & EXT2_MKJOURNAL_LAZYINIT)) { |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 262 | if (es->zero_count) { |
| 263 | if ((es->blk_to_zero + es->zero_count == new_blk) && |
| 264 | (es->zero_count < 1024)) |
| 265 | es->zero_count++; |
| 266 | else { |
Valerie Aurora Henson | 6d8b37f | 2010-06-13 11:00:00 -0400 | [diff] [blame] | 267 | retval = ext2fs_zero_blocks2(fs, |
| 268 | es->blk_to_zero, |
| 269 | es->zero_count, |
| 270 | 0, 0); |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 271 | es->zero_count = 0; |
| 272 | } |
| 273 | } |
| 274 | if (es->zero_count == 0) { |
| 275 | es->blk_to_zero = new_blk; |
| 276 | es->zero_count = 1; |
| 277 | } |
| 278 | } |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 279 | |
| 280 | if (blockcnt == 0) |
| 281 | memset(es->buf, 0, fs->blocksize); |
| 282 | |
| 283 | if (retval) { |
| 284 | es->err = retval; |
| 285 | return BLOCK_ABORT; |
| 286 | } |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 287 | *blocknr = es->goal = new_blk; |
Valerie Aurora Henson | 48f2305 | 2009-10-25 21:46:58 -0400 | [diff] [blame] | 288 | ext2fs_block_alloc_stats2(fs, new_blk, +1); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 289 | |
| 290 | if (es->num_blocks == 0) |
| 291 | return (BLOCK_CHANGED | BLOCK_ABORT); |
| 292 | else |
| 293 | return BLOCK_CHANGED; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 294 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | /* |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 298 | * This function creates a journal using direct I/O routines. |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 299 | */ |
Theodore Ts'o | 31dbecd | 2001-01-11 04:54:39 +0000 | [diff] [blame] | 300 | static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino, |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 301 | blk_t num_blocks, int flags) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 302 | { |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 303 | char *buf; |
Theodore Ts'o | b55d739 | 2008-08-28 10:20:43 -0400 | [diff] [blame] | 304 | dgrp_t group, start, end, i, log_flex; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 305 | errcode_t retval; |
| 306 | struct ext2_inode inode; |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 307 | unsigned long long inode_size; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 308 | struct mkjournal_struct es; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 309 | |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 310 | if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags, |
| 311 | &buf))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 312 | return retval; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 313 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 314 | if ((retval = ext2fs_read_bitmaps(fs))) |
| 315 | return retval; |
| 316 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 317 | if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 318 | return retval; |
| 319 | |
| 320 | if (inode.i_blocks > 0) |
| 321 | return EEXIST; |
| 322 | |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 323 | es.num_blocks = num_blocks; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 324 | es.newblocks = 0; |
| 325 | es.buf = buf; |
| 326 | es.err = 0; |
Andreas Dilger | 6c54689 | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 327 | es.flags = flags; |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 328 | es.zero_count = 0; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 329 | |
Theodore Ts'o | 961306d | 2008-08-27 15:50:44 -0400 | [diff] [blame] | 330 | if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) { |
| 331 | inode.i_flags |= EXT4_EXTENTS_FL; |
| 332 | if ((retval = ext2fs_write_inode(fs, journal_ino, &inode))) |
| 333 | return retval; |
| 334 | } |
| 335 | |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 336 | /* |
| 337 | * Set the initial goal block to be roughly at the middle of |
| 338 | * the filesystem. Pick a group that has the largest number |
| 339 | * of free blocks. |
| 340 | */ |
Theodore Ts'o | 6493f8e | 2009-10-25 20:50:15 -0400 | [diff] [blame] | 341 | group = ext2fs_group_of_blk2(fs, (ext2fs_blocks_count(fs->super) - |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 342 | fs->super->s_first_data_block) / 2); |
Theodore Ts'o | b55d739 | 2008-08-28 10:20:43 -0400 | [diff] [blame] | 343 | log_flex = 1 << fs->super->s_log_groups_per_flex; |
| 344 | if (fs->super->s_log_groups_per_flex && (group > log_flex)) { |
| 345 | group = group & ~(log_flex - 1); |
| 346 | while ((group < fs->group_desc_count) && |
Valerie Aurora Henson | d7cca6b | 2009-10-25 21:43:47 -0400 | [diff] [blame] | 347 | ext2fs_bg_free_blocks_count(fs, group) == 0) |
Theodore Ts'o | b55d739 | 2008-08-28 10:20:43 -0400 | [diff] [blame] | 348 | group++; |
| 349 | if (group == fs->group_desc_count) |
| 350 | group = 0; |
| 351 | start = group; |
| 352 | } else |
| 353 | start = (group > 0) ? group-1 : group; |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 354 | end = ((group+1) < fs->group_desc_count) ? group+1 : group; |
| 355 | group = start; |
| 356 | for (i=start+1; i <= end; i++) |
Valerie Aurora Henson | d7cca6b | 2009-10-25 21:43:47 -0400 | [diff] [blame] | 357 | if (ext2fs_bg_free_blocks_count(fs, i) > |
| 358 | ext2fs_bg_free_blocks_count(fs, group)) |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 359 | group = i; |
| 360 | |
Theodore Ts'o | 027b057 | 2013-01-03 13:42:38 -0500 | [diff] [blame] | 361 | es.goal = ext2fs_group_first_block2(fs, group); |
Valerie Aurora Henson | 6d8b37f | 2010-06-13 11:00:00 -0400 | [diff] [blame] | 362 | retval = ext2fs_block_iterate3(fs, journal_ino, BLOCK_FLAG_APPEND, |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 363 | 0, mkjournal_proc, &es); |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 364 | if (es.err) { |
| 365 | retval = es.err; |
| 366 | goto errout; |
| 367 | } |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 368 | if (es.zero_count) { |
Valerie Aurora Henson | 6d8b37f | 2010-06-13 11:00:00 -0400 | [diff] [blame] | 369 | retval = ext2fs_zero_blocks2(fs, es.blk_to_zero, |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 370 | es.zero_count, 0, 0); |
| 371 | if (retval) |
| 372 | goto errout; |
| 373 | } |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 374 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 375 | if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 376 | goto errout; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 377 | |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 378 | inode_size = (unsigned long long)fs->blocksize * num_blocks; |
| 379 | inode.i_size = inode_size & 0xFFFFFFFF; |
| 380 | inode.i_size_high = (inode_size >> 32) & 0xFFFFFFFF; |
| 381 | if (inode.i_size_high) |
| 382 | fs->super->s_feature_ro_compat |= |
| 383 | EXT2_FEATURE_RO_COMPAT_LARGE_FILE; |
Theodore Ts'o | 1ca1059 | 2008-04-09 11:39:11 -0400 | [diff] [blame] | 384 | ext2fs_iblk_add_blocks(fs, &inode, es.newblocks); |
Theodore Ts'o | 3213818 | 2005-09-24 20:14:51 -0400 | [diff] [blame] | 385 | inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 386 | inode.i_links_count = 1; |
| 387 | inode.i_mode = LINUX_S_IFREG | 0600; |
| 388 | |
Eric Sandeen | 827c188 | 2009-06-16 21:50:53 -0500 | [diff] [blame] | 389 | if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 390 | goto errout; |
| 391 | retval = 0; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 392 | |
Theodore Ts'o | a435ec3 | 2003-08-21 00:40:26 -0400 | [diff] [blame] | 393 | memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4); |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 394 | fs->super->s_jnl_blocks[15] = inode.i_size_high; |
Theodore Ts'o | a435ec3 | 2003-08-21 00:40:26 -0400 | [diff] [blame] | 395 | fs->super->s_jnl_blocks[16] = inode.i_size; |
| 396 | fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; |
| 397 | ext2fs_mark_super_dirty(fs); |
| 398 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 399 | errout: |
Namhyung Kim | 91dc3f0 | 2010-11-29 17:55:16 +0900 | [diff] [blame] | 400 | ext2fs_zero_blocks2(0, 0, 0, 0, 0); |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 401 | ext2fs_free_mem(&buf); |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 402 | return retval; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 403 | } |
| 404 | |
| 405 | /* |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 406 | * Find a reasonable journal file size (in blocks) given the number of blocks |
| 407 | * in the filesystem. For very small filesystems, it is not reasonable to |
| 408 | * have a journal that fills more than half of the filesystem. |
| 409 | */ |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 410 | int ext2fs_default_journal_size(__u64 num_blocks) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 411 | { |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 412 | if (num_blocks < 2048) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 413 | return -1; |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 414 | if (num_blocks < 32768) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 415 | return (1024); |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 416 | if (num_blocks < 256*1024) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 417 | return (4096); |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 418 | if (num_blocks < 512*1024) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 419 | return (8192); |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 420 | if (num_blocks < 1024*1024) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 421 | return (16384); |
| 422 | return 32768; |
| 423 | } |
| 424 | |
| 425 | /* |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 426 | * This function adds a journal device to a filesystem |
| 427 | */ |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 428 | errcode_t ext2fs_add_journal_device(ext2_filsys fs, ext2_filsys journal_dev) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 429 | { |
| 430 | struct stat st; |
| 431 | errcode_t retval; |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 432 | char buf[1024]; |
| 433 | journal_superblock_t *jsb; |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 434 | int start; |
| 435 | __u32 i, nr_users; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 436 | |
| 437 | /* Make sure the device exists and is a block device */ |
Theodore Ts'o | 0208886 | 2001-01-18 01:44:19 +0000 | [diff] [blame] | 438 | if (stat(journal_dev->device_name, &st) < 0) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 439 | return errno; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 440 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 441 | if (!S_ISBLK(st.st_mode)) |
Theodore Ts'o | 0360394 | 2001-04-17 00:53:25 +0000 | [diff] [blame] | 442 | return EXT2_ET_JOURNAL_NOT_BLOCK; /* Must be a block device */ |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 443 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 444 | /* Get the journal superblock */ |
Theodore Ts'o | 36131b3 | 2001-07-26 23:44:39 -0400 | [diff] [blame] | 445 | start = 1; |
| 446 | if (journal_dev->blocksize == 1024) |
| 447 | start++; |
Valerie Aurora Henson | 24a117a | 2009-09-07 21:14:24 -0400 | [diff] [blame] | 448 | if ((retval = io_channel_read_blk64(journal_dev->io, start, -1024, |
| 449 | buf))) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 450 | return retval; |
| 451 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 452 | jsb = (journal_superblock_t *) buf; |
| 453 | if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || |
| 454 | (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) |
Theodore Ts'o | 0360394 | 2001-04-17 00:53:25 +0000 | [diff] [blame] | 455 | return EXT2_ET_NO_JOURNAL_SB; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 456 | |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 457 | if (ntohl(jsb->s_blocksize) != (unsigned long) fs->blocksize) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 458 | return EXT2_ET_UNEXPECTED_BLOCK_SIZE; |
| 459 | |
| 460 | /* Check and see if this filesystem has already been added */ |
| 461 | nr_users = ntohl(jsb->s_nr_users); |
| 462 | for (i=0; i < nr_users; i++) { |
| 463 | if (memcmp(fs->super->s_uuid, |
| 464 | &jsb->s_users[i*16], 16) == 0) |
| 465 | break; |
| 466 | } |
| 467 | if (i >= nr_users) { |
| 468 | memcpy(&jsb->s_users[nr_users*16], |
| 469 | fs->super->s_uuid, 16); |
| 470 | jsb->s_nr_users = htonl(nr_users+1); |
| 471 | } |
| 472 | |
| 473 | /* Writeback the journal superblock */ |
Valerie Aurora Henson | 24a117a | 2009-09-07 21:14:24 -0400 | [diff] [blame] | 474 | if ((retval = io_channel_write_blk64(journal_dev->io, start, -1024, buf))) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 475 | return retval; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 476 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 477 | fs->super->s_journal_inum = 0; |
| 478 | fs->super->s_journal_dev = st.st_rdev; |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 479 | memcpy(fs->super->s_journal_uuid, jsb->s_uuid, |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 480 | sizeof(fs->super->s_journal_uuid)); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 481 | fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 482 | ext2fs_mark_super_dirty(fs); |
Theodore Ts'o | cdaf1fa | 2001-01-05 22:23:22 +0000 | [diff] [blame] | 483 | return 0; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | /* |
| 487 | * This function adds a journal inode to a filesystem, using either |
| 488 | * POSIX routines if the filesystem is mounted, or using direct I/O |
| 489 | * functions if it is not. |
| 490 | */ |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 491 | errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t num_blocks, int flags) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 492 | { |
| 493 | errcode_t retval; |
Theodore Ts'o | 31dbecd | 2001-01-11 04:54:39 +0000 | [diff] [blame] | 494 | ext2_ino_t journal_ino; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 495 | struct stat st; |
| 496 | char jfile[1024]; |
Andreas Dilger | 1d6fd6d | 2012-11-29 05:47:52 -0700 | [diff] [blame] | 497 | int mount_flags; |
Theodore Ts'o | 9b9a780 | 2005-12-10 21:50:30 -0500 | [diff] [blame] | 498 | int fd = -1; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 499 | |
Theodore Ts'o | 304e11c | 2012-04-05 12:30:02 -0700 | [diff] [blame] | 500 | if (flags & EXT2_MKJOURNAL_NO_MNT_CHECK) |
| 501 | mount_flags = 0; |
| 502 | else if ((retval = ext2fs_check_mount_point(fs->device_name, |
| 503 | &mount_flags, |
| 504 | jfile, sizeof(jfile)-10))) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 505 | return retval; |
| 506 | |
| 507 | if (mount_flags & EXT2_MF_MOUNTED) { |
Andreas Dilger | 1d6fd6d | 2012-11-29 05:47:52 -0700 | [diff] [blame] | 508 | #if HAVE_EXT2_IOCTLS |
| 509 | int f = 0; |
| 510 | #endif |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 511 | strcat(jfile, "/.journal"); |
| 512 | |
Theodore Ts'o | 5bc28df | 2001-11-09 17:34:54 -0500 | [diff] [blame] | 513 | /* |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 514 | * If .../.journal already exists, make sure any |
Theodore Ts'o | 5bc28df | 2001-11-09 17:34:54 -0500 | [diff] [blame] | 515 | * immutable or append-only flags are cleared. |
| 516 | */ |
| 517 | #if defined(HAVE_CHFLAGS) && defined(UF_NODUMP) |
| 518 | (void) chflags (jfile, 0); |
| 519 | #else |
| 520 | #if HAVE_EXT2_IOCTLS |
| 521 | fd = open(jfile, O_RDONLY); |
| 522 | if (fd >= 0) { |
Theodore Ts'o | 5bc28df | 2001-11-09 17:34:54 -0500 | [diff] [blame] | 523 | ioctl(fd, EXT2_IOC_SETFLAGS, &f); |
| 524 | close(fd); |
| 525 | } |
| 526 | #endif |
| 527 | #endif |
| 528 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 529 | /* Create the journal file */ |
| 530 | if ((fd = open(jfile, O_CREAT|O_WRONLY, 0600)) < 0) |
| 531 | return errno; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 532 | |
Andreas Dilger | 6c54689 | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 533 | /* Note that we can't do lazy journal initialization for mounted |
| 534 | * filesystems, since the zero writing is also allocating the |
| 535 | * journal blocks. We could use fallocate, but not all kernels |
| 536 | * support that, and creating a journal on a mounted ext2 |
| 537 | * filesystems is extremely rare these days... Ignore it. */ |
| 538 | flags &= ~EXT2_MKJOURNAL_LAZYINIT; |
| 539 | |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 540 | if ((retval = write_journal_file(fs, jfile, num_blocks, flags))) |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 541 | goto errout; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 542 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 543 | /* Get inode number of the journal file */ |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 544 | if (fstat(fd, &st) < 0) { |
| 545 | retval = errno; |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 546 | goto errout; |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 547 | } |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 548 | |
Theodore Ts'o | 7833262 | 2001-06-22 21:20:47 -0400 | [diff] [blame] | 549 | #if defined(HAVE_CHFLAGS) && defined(UF_NODUMP) |
Theodore Ts'o | 349a484 | 2001-06-11 00:49:29 +0000 | [diff] [blame] | 550 | retval = fchflags (fd, UF_NODUMP|UF_IMMUTABLE); |
| 551 | #else |
| 552 | #if HAVE_EXT2_IOCTLS |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 553 | if (ioctl(fd, EXT2_IOC_GETFLAGS, &f) < 0) { |
| 554 | retval = errno; |
| 555 | goto errout; |
| 556 | } |
| 557 | f |= EXT2_NODUMP_FL | EXT2_IMMUTABLE_FL; |
Theodore Ts'o | 349a484 | 2001-06-11 00:49:29 +0000 | [diff] [blame] | 558 | retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f); |
| 559 | #endif |
| 560 | #endif |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 561 | if (retval) { |
| 562 | retval = errno; |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 563 | goto errout; |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 564 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 565 | |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 566 | if (close(fd) < 0) { |
| 567 | retval = errno; |
| 568 | fd = -1; |
| 569 | goto errout; |
| 570 | } |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 571 | journal_ino = st.st_ino; |
| 572 | } else { |
Theodore Ts'o | cef2ac1 | 2006-04-04 19:23:41 -0400 | [diff] [blame] | 573 | if ((mount_flags & EXT2_MF_BUSY) && |
| 574 | !(fs->flags & EXT2_FLAG_EXCLUSIVE)) { |
Theodore Ts'o | 29af314 | 2005-07-19 15:04:22 -0500 | [diff] [blame] | 575 | retval = EBUSY; |
| 576 | goto errout; |
| 577 | } |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 578 | journal_ino = EXT2_JOURNAL_INO; |
| 579 | if ((retval = write_journal_inode(fs, journal_ino, |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 580 | num_blocks, flags))) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 581 | return retval; |
| 582 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 583 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 584 | fs->super->s_journal_inum = journal_ino; |
| 585 | fs->super->s_journal_dev = 0; |
| 586 | memset(fs->super->s_journal_uuid, 0, |
| 587 | sizeof(fs->super->s_journal_uuid)); |
| 588 | fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 589 | |
| 590 | ext2fs_mark_super_dirty(fs); |
| 591 | return 0; |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 592 | errout: |
Theodore Ts'o | 9b9a780 | 2005-12-10 21:50:30 -0500 | [diff] [blame] | 593 | if (fd > 0) |
| 594 | close(fd); |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 595 | return retval; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 596 | } |
| 597 | |
| 598 | #ifdef DEBUG |
| 599 | main(int argc, char **argv) |
| 600 | { |
| 601 | errcode_t retval; |
| 602 | char *device_name; |
Andreas Dilger | 931b58e | 2011-06-11 12:17:29 -0400 | [diff] [blame] | 603 | ext2_filsys fs; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 604 | |
| 605 | if (argc < 2) { |
| 606 | fprintf(stderr, "Usage: %s filesystem\n", argv[0]); |
| 607 | exit(1); |
| 608 | } |
| 609 | device_name = argv[1]; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 610 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 611 | retval = ext2fs_open (device_name, EXT2_FLAG_RW, 0, 0, |
| 612 | unix_io_manager, &fs); |
| 613 | if (retval) { |
| 614 | com_err(argv[0], retval, "while opening %s", device_name); |
| 615 | exit(1); |
| 616 | } |
| 617 | |
Theodore Ts'o | 304e11c | 2012-04-05 12:30:02 -0700 | [diff] [blame] | 618 | retval = ext2fs_add_journal_inode(fs, 1024, 0); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 619 | if (retval) { |
| 620 | com_err(argv[0], retval, "while adding journal to %s", |
| 621 | device_name); |
| 622 | exit(1); |
| 623 | } |
| 624 | retval = ext2fs_flush(fs); |
| 625 | if (retval) { |
| 626 | printf("Warning, had trouble writing out superblocks.\n"); |
| 627 | } |
| 628 | ext2fs_close(fs); |
| 629 | exit(0); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 630 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 631 | } |
| 632 | #endif |