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 | |
| 12 | #include <stdio.h> |
| 13 | #include <string.h> |
| 14 | #if HAVE_UNISTD_H |
| 15 | #include <unistd.h> |
| 16 | #endif |
| 17 | #if HAVE_ERRNO_H |
| 18 | #include <errno.h> |
| 19 | #endif |
| 20 | #include <fcntl.h> |
| 21 | #include <time.h> |
| 22 | #if HAVE_SYS_STAT_H |
| 23 | #include <sys/stat.h> |
| 24 | #endif |
| 25 | #if HAVE_SYS_TYPES_H |
| 26 | #include <sys/types.h> |
| 27 | #endif |
Theodore Ts'o | 349a484 | 2001-06-11 00:49:29 +0000 | [diff] [blame] | 28 | #if HAVE_SYS_IOCTL_H |
| 29 | #include <sys/ioctl.h> |
| 30 | #endif |
Theodore Ts'o | 17ee8b1 | 2000-10-26 20:45:58 +0000 | [diff] [blame] | 31 | #if HAVE_NETINET_IN_H |
| 32 | #include <netinet/in.h> |
| 33 | #endif |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 34 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 35 | #include "ext2_fs.h" |
Theodore Ts'o | cdaf1fa | 2001-01-05 22:23:22 +0000 | [diff] [blame] | 36 | #include "e2p/e2p.h" |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 37 | #include "ext2fs.h" |
Theodore Ts'o | 5861873 | 2000-12-09 05:47:45 +0000 | [diff] [blame] | 38 | #include "jfs_user.h" |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 39 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 40 | /* |
| 41 | * This function automatically sets up the journal superblock and |
| 42 | * returns it as an allocated block. |
| 43 | */ |
| 44 | errcode_t ext2fs_create_journal_superblock(ext2_filsys fs, |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 45 | __u32 num_blocks, int flags, |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 46 | char **ret_jsb) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 47 | { |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 48 | errcode_t retval; |
| 49 | journal_superblock_t *jsb; |
Theodore Ts'o | 0360394 | 2001-04-17 00:53:25 +0000 | [diff] [blame] | 50 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 51 | if (num_blocks < 1024) |
Theodore Ts'o | 0360394 | 2001-04-17 00:53:25 +0000 | [diff] [blame] | 52 | return EXT2_ET_JOURNAL_TOO_SMALL; |
| 53 | |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 54 | if ((retval = ext2fs_get_mem(fs->blocksize, &jsb))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 55 | return retval; |
| 56 | |
| 57 | memset (jsb, 0, fs->blocksize); |
Theodore Ts'o | 5861873 | 2000-12-09 05:47:45 +0000 | [diff] [blame] | 58 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 59 | jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER); |
Theodore Ts'o | 4e24670 | 2000-12-09 14:39:16 +0000 | [diff] [blame] | 60 | if (flags & EXT2_MKJOURNAL_V1_SUPER) |
| 61 | jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V1); |
| 62 | else |
| 63 | jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2); |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 64 | jsb->s_blocksize = htonl(fs->blocksize); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 65 | jsb->s_maxlen = htonl(num_blocks); |
Theodore Ts'o | d23042a | 2001-02-08 03:37:16 +0000 | [diff] [blame] | 66 | jsb->s_nr_users = htonl(1); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 67 | jsb->s_first = htonl(1); |
| 68 | jsb->s_sequence = htonl(1); |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 69 | 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] | 70 | /* |
Theodore Ts'o | d23042a | 2001-02-08 03:37:16 +0000 | [diff] [blame] | 71 | * If we're creating an external journal device, we need to |
| 72 | * adjust these fields. |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 73 | */ |
| 74 | if (fs->super->s_feature_incompat & |
Theodore Ts'o | 4e40f6c | 2001-07-27 23:33:40 -0400 | [diff] [blame] | 75 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 76 | jsb->s_nr_users = 0; |
Theodore Ts'o | 4e40f6c | 2001-07-27 23:33:40 -0400 | [diff] [blame] | 77 | if (fs->blocksize == 1024) |
| 78 | jsb->s_first = htonl(3); |
| 79 | else |
| 80 | jsb->s_first = htonl(2); |
| 81 | } |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 82 | |
| 83 | *ret_jsb = (char *) jsb; |
| 84 | return 0; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 85 | } |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 86 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 87 | /* |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 88 | * This function writes a journal using POSIX routines. It is used |
| 89 | * for creating external journals and creating journals on live |
| 90 | * filesystems. |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 91 | */ |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 92 | static errcode_t write_journal_file(ext2_filsys fs, char *filename, |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 93 | blk_t num_blocks, int flags) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 94 | { |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 95 | errcode_t retval; |
| 96 | char *buf = 0; |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 97 | int fd, ret_size; |
| 98 | blk_t i; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 99 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 100 | if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags, |
| 101 | &buf))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 102 | return retval; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 103 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 104 | /* Open the device or journal file */ |
| 105 | if ((fd = open(filename, O_WRONLY)) < 0) { |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 106 | retval = errno; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 107 | goto errfree; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | /* Write the superblock out */ |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 111 | retval = EXT2_ET_SHORT_WRITE; |
| 112 | ret_size = write(fd, buf, fs->blocksize); |
| 113 | if (ret_size < 0) { |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 114 | retval = errno; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 115 | goto errout; |
| 116 | } |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 117 | if (ret_size != (int) fs->blocksize) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 118 | goto errout; |
| 119 | memset(buf, 0, fs->blocksize); |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 120 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 121 | if (flags & EXT2_MKJOURNAL_LAZYINIT) |
| 122 | goto success; |
| 123 | |
| 124 | for (i = 1; i < num_blocks; i++) { |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 125 | ret_size = write(fd, buf, fs->blocksize); |
| 126 | if (ret_size < 0) { |
| 127 | retval = errno; |
| 128 | goto errout; |
| 129 | } |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 130 | if (ret_size != (int) fs->blocksize) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 131 | goto errout; |
| 132 | } |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 133 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 134 | success: |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 135 | retval = 0; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 136 | errout: |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 137 | close(fd); |
| 138 | errfree: |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 139 | ext2fs_free_mem(&buf); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 140 | return retval; |
| 141 | } |
| 142 | |
| 143 | /* |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 144 | * Convenience function which zeros out _num_ blocks starting at |
| 145 | * _blk_. In case of an error, the details of the error is returned |
| 146 | * via _ret_blk_ and _ret_count_ if they are non-NULL pointers. |
| 147 | * Returns 0 on success, and an error code on an error. |
| 148 | * |
| 149 | * As a special case, if the first argument is NULL, then it will |
| 150 | * attempt to free the static zeroizing buffer. (This is to keep |
| 151 | * programs that check for memory leaks happy.) |
| 152 | */ |
| 153 | #define STRIDE_LENGTH 8 |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 154 | errcode_t ext2fs_zero_blocks2(ext2_filsys fs, blk64_t blk, int num, |
| 155 | blk64_t *ret_blk, int *ret_count) |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 156 | { |
| 157 | int j, count; |
| 158 | static char *buf; |
| 159 | errcode_t retval; |
| 160 | |
| 161 | /* If fs is null, clean up the static buffer and return */ |
| 162 | if (!fs) { |
| 163 | if (buf) { |
| 164 | free(buf); |
| 165 | buf = 0; |
| 166 | } |
| 167 | return 0; |
| 168 | } |
| 169 | /* Allocate the zeroizing buffer if necessary */ |
| 170 | if (!buf) { |
| 171 | buf = malloc(fs->blocksize * STRIDE_LENGTH); |
| 172 | if (!buf) |
| 173 | return ENOMEM; |
| 174 | memset(buf, 0, fs->blocksize * STRIDE_LENGTH); |
| 175 | } |
| 176 | /* OK, do the write loop */ |
| 177 | j=0; |
| 178 | while (j < num) { |
Theodore Ts'o | bc507e3 | 2008-06-17 00:18:58 -0400 | [diff] [blame] | 179 | if (blk % STRIDE_LENGTH) { |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 180 | count = STRIDE_LENGTH - (blk % STRIDE_LENGTH); |
Theodore Ts'o | bc507e3 | 2008-06-17 00:18:58 -0400 | [diff] [blame] | 181 | if (count > (num - j)) |
| 182 | count = num - j; |
| 183 | } else { |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 184 | count = num - j; |
| 185 | if (count > STRIDE_LENGTH) |
| 186 | count = STRIDE_LENGTH; |
| 187 | } |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 188 | retval = io_channel_write_blk64(fs->io, blk, count, buf); |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 189 | if (retval) { |
| 190 | if (ret_count) |
| 191 | *ret_count = count; |
| 192 | if (ret_blk) |
| 193 | *ret_blk = blk; |
| 194 | return retval; |
| 195 | } |
| 196 | j += count; blk += count; |
| 197 | } |
| 198 | return 0; |
| 199 | } |
| 200 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 201 | errcode_t ext2fs_zero_blocks(ext2_filsys fs, blk_t blk, int num, |
| 202 | blk_t *ret_blk, int *ret_count) |
| 203 | { |
| 204 | blk64_t ret_blk2; |
| 205 | errcode_t retval; |
| 206 | |
| 207 | retval = ext2fs_zero_blocks2(fs, blk, num, &ret_blk2, ret_count); |
| 208 | if (retval) |
| 209 | *ret_blk = (blk_t) ret_blk2; |
| 210 | return retval; |
| 211 | } |
| 212 | |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 213 | /* |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 214 | * Helper function for creating the journal using direct I/O routines |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 215 | */ |
| 216 | struct mkjournal_struct { |
| 217 | int num_blocks; |
| 218 | int newblocks; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 219 | blk64_t goal; |
| 220 | blk64_t blk_to_zero; |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 221 | int zero_count; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 222 | int flags; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 223 | char *buf; |
| 224 | errcode_t err; |
| 225 | }; |
| 226 | |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 227 | static int mkjournal_proc(ext2_filsys fs, |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 228 | blk64_t *blocknr, |
| 229 | e2_blkcnt_t blockcnt, |
| 230 | blk64_t ref_block EXT2FS_ATTR((unused)), |
| 231 | int ref_offset EXT2FS_ATTR((unused)), |
| 232 | void *priv_data) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 233 | { |
| 234 | struct mkjournal_struct *es = (struct mkjournal_struct *) priv_data; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 235 | blk64_t new_blk; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 236 | errcode_t retval; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 237 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 238 | if (*blocknr) { |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 239 | es->goal = *blocknr; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 240 | return 0; |
| 241 | } |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 242 | if (blockcnt && |
| 243 | (EXT2FS_B2C(fs, es->goal) == EXT2FS_B2C(fs, es->goal+1))) |
| 244 | new_blk = es->goal+1; |
| 245 | else { |
| 246 | es->goal &= ~EXT2FS_CLUSTER_MASK(fs); |
| 247 | retval = ext2fs_new_block2(fs, es->goal, 0, &new_blk); |
| 248 | if (retval) { |
| 249 | es->err = retval; |
| 250 | return BLOCK_ABORT; |
| 251 | } |
| 252 | ext2fs_block_alloc_stats2(fs, new_blk, +1); |
| 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) |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 260 | retval = io_channel_write_blk64(fs->io, new_blk, 1, es->buf); |
| 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 { |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [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; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 288 | |
| 289 | if (es->num_blocks == 0) |
| 290 | return (BLOCK_CHANGED | BLOCK_ABORT); |
| 291 | else |
| 292 | return BLOCK_CHANGED; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 293 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | /* |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 297 | * This function creates a journal using direct I/O routines. |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 298 | */ |
Theodore Ts'o | 31dbecd | 2001-01-11 04:54:39 +0000 | [diff] [blame] | 299 | static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino, |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 300 | blk_t num_blocks, int flags) |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 301 | { |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 302 | char *buf; |
Theodore Ts'o | b55d739 | 2008-08-28 10:20:43 -0400 | [diff] [blame] | 303 | dgrp_t group, start, end, i, log_flex; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 304 | errcode_t retval; |
| 305 | struct ext2_inode inode; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 306 | unsigned long long inode_size; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 307 | struct mkjournal_struct es; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 308 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 309 | if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags, |
| 310 | &buf))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 311 | return retval; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 312 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 313 | if ((retval = ext2fs_read_bitmaps(fs))) |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 314 | goto out2; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 315 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 316 | if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 317 | goto out2; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 318 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 319 | if (inode.i_blocks > 0) { |
| 320 | retval = EEXIST; |
| 321 | goto out2; |
| 322 | } |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 323 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 324 | es.num_blocks = num_blocks; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 325 | es.newblocks = 0; |
| 326 | es.buf = buf; |
| 327 | es.err = 0; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 328 | es.flags = flags; |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 329 | es.zero_count = 0; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 330 | |
Theodore Ts'o | 961306d | 2008-08-27 15:50:44 -0400 | [diff] [blame] | 331 | if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) { |
| 332 | inode.i_flags |= EXT4_EXTENTS_FL; |
| 333 | if ((retval = ext2fs_write_inode(fs, journal_ino, &inode))) |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 334 | goto out2; |
Theodore Ts'o | 961306d | 2008-08-27 15:50:44 -0400 | [diff] [blame] | 335 | } |
| 336 | |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 337 | /* |
| 338 | * Set the initial goal block to be roughly at the middle of |
| 339 | * the filesystem. Pick a group that has the largest number |
| 340 | * of free blocks. |
| 341 | */ |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 342 | group = ext2fs_group_of_blk2(fs, (ext2fs_blocks_count(fs->super) - |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 343 | fs->super->s_first_data_block) / 2); |
Theodore Ts'o | b55d739 | 2008-08-28 10:20:43 -0400 | [diff] [blame] | 344 | log_flex = 1 << fs->super->s_log_groups_per_flex; |
| 345 | if (fs->super->s_log_groups_per_flex && (group > log_flex)) { |
| 346 | group = group & ~(log_flex - 1); |
| 347 | while ((group < fs->group_desc_count) && |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 348 | ext2fs_bg_free_blocks_count(fs, group) == 0) |
Theodore Ts'o | b55d739 | 2008-08-28 10:20:43 -0400 | [diff] [blame] | 349 | group++; |
| 350 | if (group == fs->group_desc_count) |
| 351 | group = 0; |
| 352 | start = group; |
| 353 | } else |
| 354 | start = (group > 0) ? group-1 : group; |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 355 | end = ((group+1) < fs->group_desc_count) ? group+1 : group; |
| 356 | group = start; |
| 357 | for (i=start+1; i <= end; i++) |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 358 | if (ext2fs_bg_free_blocks_count(fs, i) > |
| 359 | ext2fs_bg_free_blocks_count(fs, group)) |
Theodore Ts'o | 1af01e9 | 2008-08-27 15:11:28 -0400 | [diff] [blame] | 360 | group = i; |
| 361 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 362 | es.goal = ext2fs_group_first_block2(fs, group); |
| 363 | retval = ext2fs_block_iterate3(fs, journal_ino, BLOCK_FLAG_APPEND, |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 364 | 0, mkjournal_proc, &es); |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 365 | if (es.err) { |
| 366 | retval = es.err; |
| 367 | goto errout; |
| 368 | } |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 369 | if (es.zero_count) { |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 370 | retval = ext2fs_zero_blocks2(fs, es.blk_to_zero, |
Theodore Ts'o | c860850 | 2008-04-27 16:10:32 -0400 | [diff] [blame] | 371 | es.zero_count, 0, 0); |
| 372 | if (retval) |
| 373 | goto errout; |
| 374 | } |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 375 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 376 | if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 377 | goto errout; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 378 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 379 | inode_size = (unsigned long long)fs->blocksize * num_blocks; |
| 380 | inode.i_size = inode_size & 0xFFFFFFFF; |
| 381 | inode.i_size_high = (inode_size >> 32) & 0xFFFFFFFF; |
| 382 | if (ext2fs_needs_large_file_feature(inode_size)) |
| 383 | fs->super->s_feature_ro_compat |= |
| 384 | EXT2_FEATURE_RO_COMPAT_LARGE_FILE; |
Theodore Ts'o | 1ca1059 | 2008-04-09 11:39:11 -0400 | [diff] [blame] | 385 | ext2fs_iblk_add_blocks(fs, &inode, es.newblocks); |
Theodore Ts'o | 3213818 | 2005-09-24 20:14:51 -0400 | [diff] [blame] | 386 | 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] | 387 | inode.i_links_count = 1; |
| 388 | inode.i_mode = LINUX_S_IFREG | 0600; |
| 389 | |
Eric Sandeen | 827c188 | 2009-06-16 21:50:53 -0500 | [diff] [blame] | 390 | if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode))) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 391 | goto errout; |
| 392 | retval = 0; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 393 | |
Theodore Ts'o | a435ec3 | 2003-08-21 00:40:26 -0400 | [diff] [blame] | 394 | memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 395 | fs->super->s_jnl_blocks[15] = inode.i_size_high; |
Theodore Ts'o | a435ec3 | 2003-08-21 00:40:26 -0400 | [diff] [blame] | 396 | fs->super->s_jnl_blocks[16] = inode.i_size; |
| 397 | fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; |
| 398 | ext2fs_mark_super_dirty(fs); |
| 399 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 400 | errout: |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 401 | ext2fs_zero_blocks2(0, 0, 0, 0, 0); |
| 402 | out2: |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 403 | ext2fs_free_mem(&buf); |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 404 | return retval; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | /* |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 408 | * Find a reasonable journal file size (in blocks) given the number of blocks |
| 409 | * in the filesystem. For very small filesystems, it is not reasonable to |
| 410 | * have a journal that fills more than half of the filesystem. |
| 411 | */ |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 412 | int ext2fs_default_journal_size(__u64 num_blocks) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 413 | { |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 414 | if (num_blocks < 2048) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 415 | return -1; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 416 | if (num_blocks < 32768) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 417 | return (1024); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 418 | if (num_blocks < 256*1024) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 419 | return (4096); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 420 | if (num_blocks < 512*1024) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 421 | return (8192); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 422 | if (num_blocks < 1024*1024) |
Theodore Ts'o | 56d1236 | 2007-06-21 11:59:06 -0400 | [diff] [blame] | 423 | return (16384); |
| 424 | return 32768; |
| 425 | } |
| 426 | |
| 427 | /* |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 428 | * This function adds a journal device to a filesystem |
| 429 | */ |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 430 | 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] | 431 | { |
| 432 | struct stat st; |
| 433 | errcode_t retval; |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 434 | char buf[1024]; |
| 435 | journal_superblock_t *jsb; |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 436 | int start; |
| 437 | __u32 i, nr_users; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 438 | |
| 439 | /* Make sure the device exists and is a block device */ |
Theodore Ts'o | 0208886 | 2001-01-18 01:44:19 +0000 | [diff] [blame] | 440 | if (stat(journal_dev->device_name, &st) < 0) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 441 | return errno; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 442 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 443 | if (!S_ISBLK(st.st_mode)) |
Theodore Ts'o | 0360394 | 2001-04-17 00:53:25 +0000 | [diff] [blame] | 444 | return EXT2_ET_JOURNAL_NOT_BLOCK; /* Must be a block device */ |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 445 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 446 | /* Get the journal superblock */ |
Theodore Ts'o | 36131b3 | 2001-07-26 23:44:39 -0400 | [diff] [blame] | 447 | start = 1; |
| 448 | if (journal_dev->blocksize == 1024) |
| 449 | start++; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 450 | if ((retval = io_channel_read_blk64(journal_dev->io, start, -1024, |
| 451 | buf))) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 452 | return retval; |
| 453 | |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 454 | jsb = (journal_superblock_t *) buf; |
| 455 | if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || |
| 456 | (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) |
Theodore Ts'o | 0360394 | 2001-04-17 00:53:25 +0000 | [diff] [blame] | 457 | return EXT2_ET_NO_JOURNAL_SB; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 458 | |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 459 | if (ntohl(jsb->s_blocksize) != (unsigned long) fs->blocksize) |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 460 | return EXT2_ET_UNEXPECTED_BLOCK_SIZE; |
| 461 | |
| 462 | /* Check and see if this filesystem has already been added */ |
| 463 | nr_users = ntohl(jsb->s_nr_users); |
| 464 | for (i=0; i < nr_users; i++) { |
| 465 | if (memcmp(fs->super->s_uuid, |
| 466 | &jsb->s_users[i*16], 16) == 0) |
| 467 | break; |
| 468 | } |
| 469 | if (i >= nr_users) { |
| 470 | memcpy(&jsb->s_users[nr_users*16], |
| 471 | fs->super->s_uuid, 16); |
| 472 | jsb->s_nr_users = htonl(nr_users+1); |
| 473 | } |
| 474 | |
| 475 | /* Writeback the journal superblock */ |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 476 | 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] | 477 | return retval; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 478 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 479 | fs->super->s_journal_inum = 0; |
| 480 | fs->super->s_journal_dev = st.st_rdev; |
Theodore Ts'o | a112847 | 2001-01-16 06:56:14 +0000 | [diff] [blame] | 481 | memcpy(fs->super->s_journal_uuid, jsb->s_uuid, |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 482 | sizeof(fs->super->s_journal_uuid)); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 483 | fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 484 | ext2fs_mark_super_dirty(fs); |
Theodore Ts'o | cdaf1fa | 2001-01-05 22:23:22 +0000 | [diff] [blame] | 485 | return 0; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | /* |
| 489 | * This function adds a journal inode to a filesystem, using either |
| 490 | * POSIX routines if the filesystem is mounted, or using direct I/O |
| 491 | * functions if it is not. |
| 492 | */ |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 493 | 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] | 494 | { |
| 495 | errcode_t retval; |
Theodore Ts'o | 31dbecd | 2001-01-11 04:54:39 +0000 | [diff] [blame] | 496 | ext2_ino_t journal_ino; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 497 | struct stat st; |
| 498 | char jfile[1024]; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 499 | int mount_flags; |
Theodore Ts'o | 9b9a780 | 2005-12-10 21:50:30 -0500 | [diff] [blame] | 500 | int fd = -1; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 501 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 502 | if (flags & EXT2_MKJOURNAL_NO_MNT_CHECK) |
| 503 | mount_flags = 0; |
| 504 | else if ((retval = ext2fs_check_mount_point(fs->device_name, |
| 505 | &mount_flags, |
| 506 | jfile, sizeof(jfile)-10))) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 507 | return retval; |
| 508 | |
| 509 | if (mount_flags & EXT2_MF_MOUNTED) { |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 510 | #if HAVE_EXT2_IOCTLS |
| 511 | int f = 0; |
| 512 | #endif |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 513 | strcat(jfile, "/.journal"); |
| 514 | |
Theodore Ts'o | 5bc28df | 2001-11-09 17:34:54 -0500 | [diff] [blame] | 515 | /* |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 516 | * If .../.journal already exists, make sure any |
Theodore Ts'o | 5bc28df | 2001-11-09 17:34:54 -0500 | [diff] [blame] | 517 | * immutable or append-only flags are cleared. |
| 518 | */ |
| 519 | #if defined(HAVE_CHFLAGS) && defined(UF_NODUMP) |
| 520 | (void) chflags (jfile, 0); |
| 521 | #else |
| 522 | #if HAVE_EXT2_IOCTLS |
| 523 | fd = open(jfile, O_RDONLY); |
| 524 | if (fd >= 0) { |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 525 | retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f); |
Theodore Ts'o | 5bc28df | 2001-11-09 17:34:54 -0500 | [diff] [blame] | 526 | close(fd); |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 527 | if (retval) |
| 528 | return retval; |
Theodore Ts'o | 5bc28df | 2001-11-09 17:34:54 -0500 | [diff] [blame] | 529 | } |
| 530 | #endif |
| 531 | #endif |
| 532 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 533 | /* Create the journal file */ |
| 534 | if ((fd = open(jfile, O_CREAT|O_WRONLY, 0600)) < 0) |
| 535 | return errno; |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 536 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 537 | /* Note that we can't do lazy journal initialization for mounted |
| 538 | * filesystems, since the zero writing is also allocating the |
| 539 | * journal blocks. We could use fallocate, but not all kernels |
| 540 | * support that, and creating a journal on a mounted ext2 |
| 541 | * filesystems is extremely rare these days... Ignore it. */ |
| 542 | flags &= ~EXT2_MKJOURNAL_LAZYINIT; |
| 543 | |
| 544 | if ((retval = write_journal_file(fs, jfile, num_blocks, flags))) |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 545 | goto errout; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 546 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 547 | /* Get inode number of the journal file */ |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 548 | if (fstat(fd, &st) < 0) { |
| 549 | retval = errno; |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 550 | goto errout; |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 551 | } |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 552 | |
Theodore Ts'o | 7833262 | 2001-06-22 21:20:47 -0400 | [diff] [blame] | 553 | #if defined(HAVE_CHFLAGS) && defined(UF_NODUMP) |
Theodore Ts'o | 349a484 | 2001-06-11 00:49:29 +0000 | [diff] [blame] | 554 | retval = fchflags (fd, UF_NODUMP|UF_IMMUTABLE); |
| 555 | #else |
| 556 | #if HAVE_EXT2_IOCTLS |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 557 | if (ioctl(fd, EXT2_IOC_GETFLAGS, &f) < 0) { |
| 558 | retval = errno; |
| 559 | goto errout; |
| 560 | } |
| 561 | f |= EXT2_NODUMP_FL | EXT2_IMMUTABLE_FL; |
Theodore Ts'o | 349a484 | 2001-06-11 00:49:29 +0000 | [diff] [blame] | 562 | retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f); |
| 563 | #endif |
| 564 | #endif |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 565 | if (retval) { |
| 566 | retval = errno; |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 567 | goto errout; |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 568 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 569 | |
Theodore Ts'o | 8bafedb | 2009-08-25 10:07:16 -0400 | [diff] [blame] | 570 | if (close(fd) < 0) { |
| 571 | retval = errno; |
| 572 | fd = -1; |
| 573 | goto errout; |
| 574 | } |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 575 | journal_ino = st.st_ino; |
| 576 | } else { |
Theodore Ts'o | cef2ac1 | 2006-04-04 19:23:41 -0400 | [diff] [blame] | 577 | if ((mount_flags & EXT2_MF_BUSY) && |
| 578 | !(fs->flags & EXT2_FLAG_EXCLUSIVE)) { |
Theodore Ts'o | 29af314 | 2005-07-19 15:04:22 -0500 | [diff] [blame] | 579 | retval = EBUSY; |
| 580 | goto errout; |
| 581 | } |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 582 | journal_ino = EXT2_JOURNAL_INO; |
| 583 | if ((retval = write_journal_inode(fs, journal_ino, |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 584 | num_blocks, flags))) |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 585 | return retval; |
| 586 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 587 | |
Theodore Ts'o | 4becab6 | 2001-01-03 19:22:42 +0000 | [diff] [blame] | 588 | fs->super->s_journal_inum = journal_ino; |
| 589 | fs->super->s_journal_dev = 0; |
| 590 | memset(fs->super->s_journal_uuid, 0, |
| 591 | sizeof(fs->super->s_journal_uuid)); |
| 592 | fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 593 | |
| 594 | ext2fs_mark_super_dirty(fs); |
| 595 | return 0; |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 596 | errout: |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 597 | if (fd >= 0) |
Theodore Ts'o | 9b9a780 | 2005-12-10 21:50:30 -0500 | [diff] [blame] | 598 | close(fd); |
Theodore Ts'o | b23520d | 2001-06-22 21:52:14 -0400 | [diff] [blame] | 599 | return retval; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | #ifdef DEBUG |
| 603 | main(int argc, char **argv) |
| 604 | { |
| 605 | errcode_t retval; |
| 606 | char *device_name; |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 607 | ext2_filsys fs; |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 608 | |
| 609 | if (argc < 2) { |
| 610 | fprintf(stderr, "Usage: %s filesystem\n", argv[0]); |
| 611 | exit(1); |
| 612 | } |
| 613 | device_name = argv[1]; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 614 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 615 | retval = ext2fs_open (device_name, EXT2_FLAG_RW, 0, 0, |
| 616 | unix_io_manager, &fs); |
| 617 | if (retval) { |
| 618 | com_err(argv[0], retval, "while opening %s", device_name); |
| 619 | exit(1); |
| 620 | } |
| 621 | |
JP Abgrall | e0ed740 | 2014-03-19 19:08:39 -0700 | [diff] [blame] | 622 | retval = ext2fs_add_journal_inode(fs, 1024, 0); |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 623 | if (retval) { |
| 624 | com_err(argv[0], retval, "while adding journal to %s", |
| 625 | device_name); |
| 626 | exit(1); |
| 627 | } |
| 628 | retval = ext2fs_flush(fs); |
| 629 | if (retval) { |
| 630 | printf("Warning, had trouble writing out superblocks.\n"); |
| 631 | } |
| 632 | ext2fs_close(fs); |
| 633 | exit(0); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 634 | |
Theodore Ts'o | d3cd93c | 2000-10-24 18:33:16 +0000 | [diff] [blame] | 635 | } |
| 636 | #endif |