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Commit | Line | Data |
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3839e657 TT |
1 | /* |
2 | * pass3.c -- pass #3 of e2fsck: Check for directory connectivity | |
3 | * | |
c1faf9cc | 4 | * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999 Theodore Ts'o. |
21c84b71 TT |
5 | * |
6 | * %Begin-Header% | |
7 | * This file may be redistributed under the terms of the GNU Public | |
8 | * License. | |
9 | * %End-Header% | |
efc6f628 | 10 | * |
3839e657 TT |
11 | * Pass #3 assures that all directories are connected to the |
12 | * filesystem tree, using the following algorithm: | |
13 | * | |
14 | * First, the root directory is checked to make sure it exists; if | |
15 | * not, e2fsck will offer to create a new one. It is then marked as | |
16 | * "done". | |
efc6f628 | 17 | * |
3839e657 TT |
18 | * Then, pass3 interates over all directory inodes; for each directory |
19 | * it attempts to trace up the filesystem tree, using dirinfo.parent | |
20 | * until it reaches a directory which has been marked "done". If it | |
21 | * can not do so, then the directory must be disconnected, and e2fsck | |
22 | * will offer to reconnect it to /lost+found. While it is chasing | |
23 | * parent pointers up the filesystem tree, if pass3 sees a directory | |
24 | * twice, then it has detected a filesystem loop, and it will again | |
25 | * offer to reconnect the directory to /lost+found in to break the | |
26 | * filesystem loop. | |
efc6f628 | 27 | * |
08b21301 TT |
28 | * Pass 3 also contains the subroutine, e2fsck_reconnect_file() to |
29 | * reconnect inodes to /lost+found; this subroutine is also used by | |
30 | * pass 4. e2fsck_reconnect_file() calls get_lost_and_found(), which | |
31 | * is responsible for creating /lost+found if it does not exist. | |
3839e657 TT |
32 | * |
33 | * Pass 3 frees the following data structures: | |
34 | * - The dirinfo directory information cache. | |
35 | */ | |
36 | ||
d1154eb4 | 37 | #include "config.h" |
50e1e10f TT |
38 | #ifdef HAVE_ERRNO_H |
39 | #include <errno.h> | |
40 | #endif | |
3839e657 TT |
41 | |
42 | #include "e2fsck.h" | |
21c84b71 | 43 | #include "problem.h" |
3839e657 | 44 | |
1b6bf175 | 45 | static void check_root(e2fsck_t ctx); |
28db82a8 | 46 | static int check_directory(e2fsck_t ctx, ext2_ino_t ino, |
28ffafb0 | 47 | struct problem_context *pctx); |
28db82a8 | 48 | static void fix_dotdot(e2fsck_t ctx, ext2_ino_t ino, ext2_ino_t parent); |
3839e657 | 49 | |
a02ce9df TT |
50 | static ext2fs_inode_bitmap inode_loop_detect = 0; |
51 | static ext2fs_inode_bitmap inode_done_map = 0; | |
efc6f628 | 52 | |
08b21301 | 53 | void e2fsck_pass3(e2fsck_t ctx) |
3839e657 | 54 | { |
1b6bf175 | 55 | ext2_filsys fs = ctx->fs; |
f0131bdc | 56 | struct dir_info_iter *iter = NULL; |
8bf191e8 | 57 | #ifdef RESOURCE_TRACK |
3839e657 | 58 | struct resource_track rtrack; |
8bf191e8 | 59 | #endif |
21c84b71 TT |
60 | struct problem_context pctx; |
61 | struct dir_info *dir; | |
7f813ba3 | 62 | unsigned long maxdirs, count; |
f8188fff | 63 | |
6d96b00d | 64 | init_resource_track(&rtrack, ctx->fs->io); |
1b6bf175 TT |
65 | clear_problem_context(&pctx); |
66 | ||
3839e657 TT |
67 | #ifdef MTRACE |
68 | mtrace_print("Pass 3"); | |
69 | #endif | |
70 | ||
1b6bf175 TT |
71 | if (!(ctx->options & E2F_OPT_PREEN)) |
72 | fix_problem(ctx, PR_3_PASS_HEADER, &pctx); | |
3839e657 TT |
73 | |
74 | /* | |
75 | * Allocate some bitmaps to do loop detection. | |
76 | */ | |
830b44f4 TT |
77 | pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("inode done bitmap"), |
78 | EXT2FS_BMAP64_AUTODIR, | |
79 | "inode_done_map", &inode_done_map); | |
1b6bf175 TT |
80 | if (pctx.errcode) { |
81 | pctx.num = 2; | |
82 | fix_problem(ctx, PR_3_ALLOCATE_IBITMAP_ERROR, &pctx); | |
08b21301 | 83 | ctx->flags |= E2F_FLAG_ABORT; |
a02ce9df | 84 | goto abort_exit; |
3839e657 | 85 | } |
9facd076 | 86 | print_resource_track(ctx, _("Peak memory"), &ctx->global_rtrack, NULL); |
3839e657 | 87 | |
1b6bf175 | 88 | check_root(ctx); |
a02ce9df TT |
89 | if (ctx->flags & E2F_FLAG_SIGNAL_MASK) |
90 | goto abort_exit; | |
08b21301 | 91 | |
c5d2f50d | 92 | ext2fs_mark_inode_bitmap2(inode_done_map, EXT2_ROOT_INO); |
3839e657 | 93 | |
7f813ba3 | 94 | maxdirs = e2fsck_get_num_dirinfo(ctx); |
f75c28de | 95 | count = 1; |
f8188fff | 96 | |
f75c28de | 97 | if (ctx->progress) |
7f813ba3 | 98 | if ((ctx->progress)(ctx, 3, 0, maxdirs)) |
f75c28de | 99 | goto abort_exit; |
efc6f628 | 100 | |
28db82a8 TT |
101 | iter = e2fsck_dir_info_iter_begin(ctx); |
102 | while ((dir = e2fsck_dir_info_iter(ctx, iter)) != 0) { | |
4cae0452 TT |
103 | if (ctx->flags & E2F_FLAG_SIGNAL_MASK) |
104 | goto abort_exit; | |
105 | if (ctx->progress && (ctx->progress)(ctx, 3, count++, maxdirs)) | |
106 | goto abort_exit; | |
c5d2f50d | 107 | if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, dir->ino)) |
28db82a8 | 108 | if (check_directory(ctx, dir->ino, &pctx)) |
28ffafb0 | 109 | goto abort_exit; |
3839e657 | 110 | } |
a02ce9df | 111 | |
5a679c8f TT |
112 | /* |
113 | * Force the creation of /lost+found if not present | |
114 | */ | |
e9a8c0c2 | 115 | if ((ctx->options & E2F_OPT_READONLY) == 0) |
850d05e9 | 116 | e2fsck_get_lost_and_found(ctx, 1); |
5a679c8f | 117 | |
850d05e9 TT |
118 | /* |
119 | * If there are any directories that need to be indexed or | |
120 | * optimized, do it here. | |
121 | */ | |
122 | e2fsck_rehash_directories(ctx); | |
efc6f628 | 123 | |
a02ce9df | 124 | abort_exit: |
f0131bdc DW |
125 | if (iter) |
126 | e2fsck_dir_info_iter_end(ctx, iter); | |
08b21301 | 127 | e2fsck_free_dir_info(ctx); |
28ffafb0 | 128 | if (inode_loop_detect) { |
a02ce9df | 129 | ext2fs_free_inode_bitmap(inode_loop_detect); |
28ffafb0 TT |
130 | inode_loop_detect = 0; |
131 | } | |
132 | if (inode_done_map) { | |
a02ce9df | 133 | ext2fs_free_inode_bitmap(inode_done_map); |
28ffafb0 TT |
134 | inode_done_map = 0; |
135 | } | |
b7a00563 | 136 | |
9facd076 | 137 | print_resource_track(ctx, _("Pass 3"), &rtrack, ctx->fs->io); |
3839e657 TT |
138 | } |
139 | ||
140 | /* | |
141 | * This makes sure the root inode is present; if not, we ask if the | |
142 | * user wants us to create it. Not creating it is a fatal error. | |
143 | */ | |
1b6bf175 | 144 | static void check_root(e2fsck_t ctx) |
3839e657 | 145 | { |
1b6bf175 | 146 | ext2_filsys fs = ctx->fs; |
c5d2f50d | 147 | blk64_t blk; |
3839e657 TT |
148 | struct ext2_inode inode; |
149 | char * block; | |
1b6bf175 | 150 | struct problem_context pctx; |
efc6f628 | 151 | |
1b6bf175 | 152 | clear_problem_context(&pctx); |
efc6f628 | 153 | |
c5d2f50d | 154 | if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO)) { |
3839e657 | 155 | /* |
08b21301 | 156 | * If the root inode is not a directory, die here. The |
3839e657 TT |
157 | * user must have answered 'no' in pass1 when we |
158 | * offered to clear it. | |
159 | */ | |
c5d2f50d | 160 | if (!(ext2fs_test_inode_bitmap2(ctx->inode_dir_map, |
f8188fff TT |
161 | EXT2_ROOT_INO))) { |
162 | fix_problem(ctx, PR_3_ROOT_NOT_DIR_ABORT, &pctx); | |
163 | ctx->flags |= E2F_FLAG_ABORT; | |
164 | } | |
3839e657 TT |
165 | return; |
166 | } | |
167 | ||
f8188fff TT |
168 | if (!fix_problem(ctx, PR_3_NO_ROOT_INODE, &pctx)) { |
169 | fix_problem(ctx, PR_3_NO_ROOT_INODE_ABORT, &pctx); | |
170 | ctx->flags |= E2F_FLAG_ABORT; | |
171 | return; | |
172 | } | |
3839e657 | 173 | |
f8188fff | 174 | e2fsck_read_bitmaps(ctx); |
efc6f628 | 175 | |
3839e657 TT |
176 | /* |
177 | * First, find a free block | |
178 | */ | |
c5d2f50d | 179 | pctx.errcode = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk); |
1b6bf175 TT |
180 | if (pctx.errcode) { |
181 | pctx.str = "ext2fs_new_block"; | |
182 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
08b21301 TT |
183 | ctx->flags |= E2F_FLAG_ABORT; |
184 | return; | |
3839e657 | 185 | } |
c5d2f50d VAH |
186 | ext2fs_mark_block_bitmap2(ctx->block_found_map, blk); |
187 | ext2fs_mark_block_bitmap2(fs->block_map, blk); | |
3839e657 TT |
188 | ext2fs_mark_bb_dirty(fs); |
189 | ||
190 | /* | |
191 | * Now let's create the actual data block for the inode | |
192 | */ | |
1b6bf175 TT |
193 | pctx.errcode = ext2fs_new_dir_block(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, |
194 | &block); | |
195 | if (pctx.errcode) { | |
196 | pctx.str = "ext2fs_new_dir_block"; | |
197 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
08b21301 TT |
198 | ctx->flags |= E2F_FLAG_ABORT; |
199 | return; | |
3839e657 TT |
200 | } |
201 | ||
7bef6d52 | 202 | pctx.errcode = ext2fs_write_dir_block3(fs, blk, block, 0); |
1b6bf175 | 203 | if (pctx.errcode) { |
7bef6d52 | 204 | pctx.str = "ext2fs_write_dir_block3"; |
1b6bf175 | 205 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); |
08b21301 TT |
206 | ctx->flags |= E2F_FLAG_ABORT; |
207 | return; | |
3839e657 | 208 | } |
c4e3d3f3 | 209 | ext2fs_free_mem(&block); |
3839e657 TT |
210 | |
211 | /* | |
212 | * Set up the inode structure | |
213 | */ | |
214 | memset(&inode, 0, sizeof(inode)); | |
215 | inode.i_mode = 040755; | |
216 | inode.i_size = fs->blocksize; | |
1f3ad14a | 217 | inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now; |
3839e657 | 218 | inode.i_links_count = 2; |
1ca1059f | 219 | ext2fs_iblk_set(fs, &inode, 1); |
3839e657 TT |
220 | inode.i_block[0] = blk; |
221 | ||
222 | /* | |
223 | * Write out the inode. | |
224 | */ | |
030970ed | 225 | pctx.errcode = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode); |
1b6bf175 TT |
226 | if (pctx.errcode) { |
227 | pctx.str = "ext2fs_write_inode"; | |
228 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
08b21301 TT |
229 | ctx->flags |= E2F_FLAG_ABORT; |
230 | return; | |
3839e657 | 231 | } |
efc6f628 | 232 | |
3839e657 TT |
233 | /* |
234 | * Miscellaneous bookkeeping... | |
235 | */ | |
08b21301 | 236 | e2fsck_add_dir_info(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO); |
1b6bf175 TT |
237 | ext2fs_icount_store(ctx->inode_count, EXT2_ROOT_INO, 2); |
238 | ext2fs_icount_store(ctx->inode_link_info, EXT2_ROOT_INO, 2); | |
3839e657 | 239 | |
c5d2f50d VAH |
240 | ext2fs_mark_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO); |
241 | ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, EXT2_ROOT_INO); | |
242 | ext2fs_mark_inode_bitmap2(fs->inode_map, EXT2_ROOT_INO); | |
3839e657 TT |
243 | ext2fs_mark_ib_dirty(fs); |
244 | } | |
245 | ||
246 | /* | |
247 | * This subroutine is responsible for making sure that a particular | |
248 | * directory is connected to the root; if it isn't we trace it up as | |
249 | * far as we can go, and then offer to connect the resulting parent to | |
250 | * the lost+found. We have to do loop detection; if we ever discover | |
251 | * a loop, we treat that as a disconnected directory and offer to | |
252 | * reparent it to lost+found. | |
efc6f628 | 253 | * |
28ffafb0 TT |
254 | * However, loop detection is expensive, because for very large |
255 | * filesystems, the inode_loop_detect bitmap is huge, and clearing it | |
256 | * is non-trivial. Loops in filesystems are also a rare error case, | |
257 | * and we shouldn't optimize for error cases. So we try two passes of | |
258 | * the algorithm. The first time, we ignore loop detection and merely | |
259 | * increment a counter; if the counter exceeds some extreme threshold, | |
260 | * then we try again with the loop detection bitmap enabled. | |
3839e657 | 261 | */ |
28db82a8 | 262 | static int check_directory(e2fsck_t ctx, ext2_ino_t dir, |
28ffafb0 | 263 | struct problem_context *pctx) |
3839e657 | 264 | { |
28ffafb0 | 265 | ext2_filsys fs = ctx->fs; |
28db82a8 | 266 | ext2_ino_t ino = dir, parent; |
28ffafb0 | 267 | int loop_pass = 0, parent_count = 0; |
3839e657 | 268 | |
28ffafb0 | 269 | while (1) { |
3839e657 TT |
270 | /* |
271 | * Mark this inode as being "done"; by the time we | |
272 | * return from this function, the inode we either be | |
273 | * verified as being connected to the directory tree, | |
274 | * or we will have offered to reconnect this to | |
275 | * lost+found. | |
28ffafb0 TT |
276 | * |
277 | * If it was marked done already, then we've reached a | |
278 | * parent we've already checked. | |
3839e657 | 279 | */ |
c5d2f50d | 280 | if (ext2fs_mark_inode_bitmap2(inode_done_map, ino)) |
28ffafb0 | 281 | break; |
7f813ba3 | 282 | |
28db82a8 TT |
283 | if (e2fsck_dir_info_get_parent(ctx, ino, &parent)) { |
284 | fix_problem(ctx, PR_3_NO_DIRINFO, pctx); | |
285 | return 0; | |
286 | } | |
287 | ||
3839e657 TT |
288 | /* |
289 | * If this directory doesn't have a parent, or we've | |
290 | * seen the parent once already, then offer to | |
291 | * reparent it to lost+found | |
292 | */ | |
28db82a8 | 293 | if (!parent || |
efc6f628 | 294 | (loop_pass && |
c5d2f50d | 295 | (ext2fs_test_inode_bitmap2(inode_loop_detect, |
28db82a8 TT |
296 | parent)))) { |
297 | pctx->ino = ino; | |
7f813ba3 | 298 | if (fix_problem(ctx, PR_3_UNCONNECTED_DIR, pctx)) { |
2e5fcce0 | 299 | if (e2fsck_reconnect_file(ctx, pctx->ino)) |
7f813ba3 TT |
300 | ext2fs_unmark_valid(fs); |
301 | else { | |
efc6f628 | 302 | fix_dotdot(ctx, pctx->ino, |
28db82a8 TT |
303 | ctx->lost_and_found); |
304 | parent = ctx->lost_and_found; | |
7f813ba3 TT |
305 | } |
306 | } | |
3839e657 | 307 | break; |
7f813ba3 | 308 | } |
28db82a8 | 309 | ino = parent; |
28ffafb0 | 310 | if (loop_pass) { |
c5d2f50d | 311 | ext2fs_mark_inode_bitmap2(inode_loop_detect, ino); |
28ffafb0 TT |
312 | } else if (parent_count++ > 2048) { |
313 | /* | |
314 | * If we've run into a path depth that's | |
315 | * greater than 2048, try again with the inode | |
316 | * loop bitmap turned on and start from the | |
317 | * top. | |
318 | */ | |
319 | loop_pass = 1; | |
320 | if (inode_loop_detect) | |
321 | ext2fs_clear_inode_bitmap(inode_loop_detect); | |
322 | else { | |
830b44f4 | 323 | pctx->errcode = e2fsck_allocate_inode_bitmap(fs, _("inode loop detection bitmap"), EXT2FS_BMAP64_AUTODIR, "inode_loop_detect", &inode_loop_detect); |
28ffafb0 TT |
324 | if (pctx->errcode) { |
325 | pctx->num = 1; | |
efc6f628 | 326 | fix_problem(ctx, |
28ffafb0 TT |
327 | PR_3_ALLOCATE_IBITMAP_ERROR, pctx); |
328 | ctx->flags |= E2F_FLAG_ABORT; | |
329 | return -1; | |
330 | } | |
331 | } | |
28db82a8 | 332 | ino = dir; |
3839e657 | 333 | } |
21c84b71 | 334 | } |
3839e657 TT |
335 | |
336 | /* | |
337 | * Make sure that .. and the parent directory are the same; | |
338 | * offer to fix it if not. | |
339 | */ | |
28db82a8 TT |
340 | pctx->ino = dir; |
341 | if (e2fsck_dir_info_get_dotdot(ctx, dir, &pctx->ino2) || | |
342 | e2fsck_dir_info_get_parent(ctx, dir, &pctx->dir)) { | |
343 | fix_problem(ctx, PR_3_NO_DIRINFO, pctx); | |
344 | return 0; | |
345 | } | |
346 | if (pctx->ino2 != pctx->dir) { | |
1b6bf175 | 347 | if (fix_problem(ctx, PR_3_BAD_DOT_DOT, pctx)) |
28db82a8 | 348 | fix_dotdot(ctx, dir, pctx->dir); |
3839e657 | 349 | } |
28ffafb0 | 350 | return 0; |
b7a00563 | 351 | } |
3839e657 TT |
352 | |
353 | /* | |
354 | * This routine gets the lost_and_found inode, making it a directory | |
355 | * if necessary | |
356 | */ | |
850d05e9 | 357 | ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix) |
3839e657 | 358 | { |
1b6bf175 | 359 | ext2_filsys fs = ctx->fs; |
86c627ec | 360 | ext2_ino_t ino; |
c5d2f50d | 361 | blk64_t blk; |
3839e657 TT |
362 | errcode_t retval; |
363 | struct ext2_inode inode; | |
364 | char * block; | |
53ef44c4 | 365 | static const char name[] = "lost+found"; |
1b6bf175 | 366 | struct problem_context pctx; |
3839e657 | 367 | |
850d05e9 TT |
368 | if (ctx->lost_and_found) |
369 | return ctx->lost_and_found; | |
370 | ||
1b6bf175 | 371 | clear_problem_context(&pctx); |
efc6f628 | 372 | |
21c84b71 TT |
373 | retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, |
374 | sizeof(name)-1, 0, &ino); | |
850d05e9 TT |
375 | if (retval && !fix) |
376 | return 0; | |
4a9f5936 | 377 | if (!retval) { |
c5d2f50d | 378 | if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, ino)) { |
850d05e9 | 379 | ctx->lost_and_found = ino; |
4a9f5936 | 380 | return ino; |
850d05e9 | 381 | } |
efc6f628 | 382 | |
4a9f5936 | 383 | /* Lost+found isn't a directory! */ |
850d05e9 TT |
384 | if (!fix) |
385 | return 0; | |
4a9f5936 TT |
386 | pctx.ino = ino; |
387 | if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx)) | |
388 | return 0; | |
389 | ||
c54b3c3c | 390 | /* OK, unlink the old /lost+found file. */ |
4a9f5936 TT |
391 | pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0); |
392 | if (pctx.errcode) { | |
393 | pctx.str = "ext2fs_unlink"; | |
394 | fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); | |
395 | return 0; | |
396 | } | |
28db82a8 | 397 | (void) e2fsck_dir_info_set_parent(ctx, ino, 0); |
b0700a1b | 398 | e2fsck_adjust_inode_count(ctx, ino, -1); |
4a9f5936 | 399 | } else if (retval != EXT2_ET_FILE_NOT_FOUND) { |
1b6bf175 TT |
400 | pctx.errcode = retval; |
401 | fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx); | |
402 | } | |
403 | if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0)) | |
3839e657 | 404 | return 0; |
3839e657 TT |
405 | |
406 | /* | |
407 | * Read the inode and block bitmaps in; we'll be messing with | |
408 | * them. | |
409 | */ | |
f8188fff | 410 | e2fsck_read_bitmaps(ctx); |
efc6f628 | 411 | |
3839e657 TT |
412 | /* |
413 | * First, find a free block | |
414 | */ | |
c5d2f50d | 415 | retval = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk); |
3839e657 | 416 | if (retval) { |
1b6bf175 TT |
417 | pctx.errcode = retval; |
418 | fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx); | |
3839e657 TT |
419 | return 0; |
420 | } | |
c5d2f50d | 421 | ext2fs_mark_block_bitmap2(ctx->block_found_map, blk); |
48f23054 | 422 | ext2fs_block_alloc_stats2(fs, blk, +1); |
3839e657 TT |
423 | |
424 | /* | |
425 | * Next find a free inode. | |
426 | */ | |
b0700a1b | 427 | retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700, |
1b6bf175 | 428 | ctx->inode_used_map, &ino); |
3839e657 | 429 | if (retval) { |
1b6bf175 TT |
430 | pctx.errcode = retval; |
431 | fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx); | |
3839e657 TT |
432 | return 0; |
433 | } | |
c5d2f50d VAH |
434 | ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino); |
435 | ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino); | |
0684a4f3 | 436 | ext2fs_inode_alloc_stats2(fs, ino, +1, 1); |
3839e657 TT |
437 | |
438 | /* | |
439 | * Now let's create the actual data block for the inode | |
440 | */ | |
441 | retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block); | |
442 | if (retval) { | |
1b6bf175 TT |
443 | pctx.errcode = retval; |
444 | fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx); | |
3839e657 TT |
445 | return 0; |
446 | } | |
447 | ||
7bef6d52 | 448 | retval = ext2fs_write_dir_block3(fs, blk, block, 0); |
c4e3d3f3 | 449 | ext2fs_free_mem(&block); |
3839e657 | 450 | if (retval) { |
1b6bf175 TT |
451 | pctx.errcode = retval; |
452 | fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx); | |
3839e657 TT |
453 | return 0; |
454 | } | |
3839e657 TT |
455 | |
456 | /* | |
457 | * Set up the inode structure | |
458 | */ | |
459 | memset(&inode, 0, sizeof(inode)); | |
64aecc4d | 460 | inode.i_mode = 040700; |
3839e657 | 461 | inode.i_size = fs->blocksize; |
1f3ad14a | 462 | inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now; |
3839e657 | 463 | inode.i_links_count = 2; |
1ca1059f | 464 | ext2fs_iblk_set(fs, &inode, 1); |
3839e657 TT |
465 | inode.i_block[0] = blk; |
466 | ||
467 | /* | |
468 | * Next, write out the inode. | |
469 | */ | |
030970ed | 470 | pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode); |
1b6bf175 TT |
471 | if (pctx.errcode) { |
472 | pctx.str = "ext2fs_write_inode"; | |
473 | fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); | |
3839e657 TT |
474 | return 0; |
475 | } | |
476 | /* | |
477 | * Finally, create the directory link | |
478 | */ | |
6fdc7a32 | 479 | pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR); |
1b6bf175 TT |
480 | if (pctx.errcode) { |
481 | pctx.str = "ext2fs_link"; | |
482 | fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); | |
3839e657 TT |
483 | return 0; |
484 | } | |
485 | ||
486 | /* | |
487 | * Miscellaneous bookkeeping that needs to be kept straight. | |
488 | */ | |
08b21301 | 489 | e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO); |
b0700a1b | 490 | e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1); |
1b6bf175 TT |
491 | ext2fs_icount_store(ctx->inode_count, ino, 2); |
492 | ext2fs_icount_store(ctx->inode_link_info, ino, 2); | |
850d05e9 | 493 | ctx->lost_and_found = ino; |
624e4a64 AK |
494 | quota_data_add(ctx->qctx, &inode, ino, fs->blocksize); |
495 | quota_data_inodes(ctx->qctx, &inode, ino, +1); | |
3839e657 | 496 | #if 0 |
f3db3566 | 497 | printf("/lost+found created; inode #%lu\n", ino); |
3839e657 TT |
498 | #endif |
499 | return ino; | |
500 | } | |
501 | ||
502 | /* | |
503 | * This routine will connect a file to lost+found | |
504 | */ | |
86c627ec | 505 | int e2fsck_reconnect_file(e2fsck_t ctx, ext2_ino_t ino) |
3839e657 | 506 | { |
1b6bf175 | 507 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
508 | errcode_t retval; |
509 | char name[80]; | |
1b6bf175 | 510 | struct problem_context pctx; |
6fdc7a32 TT |
511 | struct ext2_inode inode; |
512 | int file_type = 0; | |
1b6bf175 TT |
513 | |
514 | clear_problem_context(&pctx); | |
6fdc7a32 | 515 | pctx.ino = ino; |
1b6bf175 | 516 | |
850d05e9 TT |
517 | if (!ctx->bad_lost_and_found && !ctx->lost_and_found) { |
518 | if (e2fsck_get_lost_and_found(ctx, 1) == 0) | |
519 | ctx->bad_lost_and_found++; | |
1b6bf175 | 520 | } |
850d05e9 | 521 | if (ctx->bad_lost_and_found) { |
1b6bf175 | 522 | fix_problem(ctx, PR_3_NO_LPF, &pctx); |
3839e657 TT |
523 | return 1; |
524 | } | |
efc6f628 | 525 | |
86c627ec | 526 | sprintf(name, "#%u", ino); |
6fdc7a32 TT |
527 | if (ext2fs_read_inode(fs, ino, &inode) == 0) |
528 | file_type = ext2_file_type(inode.i_mode); | |
850d05e9 | 529 | retval = ext2fs_link(fs, ctx->lost_and_found, name, ino, file_type); |
3839e657 | 530 | if (retval == EXT2_ET_DIR_NO_SPACE) { |
1b6bf175 | 531 | if (!fix_problem(ctx, PR_3_EXPAND_LF_DIR, &pctx)) |
3839e657 | 532 | return 1; |
efc6f628 | 533 | retval = e2fsck_expand_directory(ctx, ctx->lost_and_found, |
850d05e9 | 534 | 1, 0); |
3839e657 | 535 | if (retval) { |
1b6bf175 TT |
536 | pctx.errcode = retval; |
537 | fix_problem(ctx, PR_3_CANT_EXPAND_LPF, &pctx); | |
3839e657 TT |
538 | return 1; |
539 | } | |
850d05e9 TT |
540 | retval = ext2fs_link(fs, ctx->lost_and_found, name, |
541 | ino, file_type); | |
3839e657 TT |
542 | } |
543 | if (retval) { | |
1b6bf175 TT |
544 | pctx.errcode = retval; |
545 | fix_problem(ctx, PR_3_CANT_RECONNECT, &pctx); | |
3839e657 TT |
546 | return 1; |
547 | } | |
b0700a1b | 548 | e2fsck_adjust_inode_count(ctx, ino, 1); |
3839e657 TT |
549 | |
550 | return 0; | |
551 | } | |
552 | ||
553 | /* | |
554 | * Utility routine to adjust the inode counts on an inode. | |
555 | */ | |
b0700a1b | 556 | errcode_t e2fsck_adjust_inode_count(e2fsck_t ctx, ext2_ino_t ino, int adj) |
3839e657 | 557 | { |
1b6bf175 | 558 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
559 | errcode_t retval; |
560 | struct ext2_inode inode; | |
efc6f628 | 561 | |
3839e657 TT |
562 | if (!ino) |
563 | return 0; | |
564 | ||
565 | retval = ext2fs_read_inode(fs, ino, &inode); | |
566 | if (retval) | |
567 | return retval; | |
568 | ||
569 | #if 0 | |
f3db3566 | 570 | printf("Adjusting link count for inode %lu by %d (from %d)\n", ino, adj, |
3839e657 TT |
571 | inode.i_links_count); |
572 | #endif | |
573 | ||
21c84b71 | 574 | if (adj == 1) { |
1b6bf175 | 575 | ext2fs_icount_increment(ctx->inode_count, ino, 0); |
c1faf9cc TT |
576 | if (inode.i_links_count == (__u16) ~0) |
577 | return 0; | |
1b6bf175 | 578 | ext2fs_icount_increment(ctx->inode_link_info, ino, 0); |
c1faf9cc TT |
579 | inode.i_links_count++; |
580 | } else if (adj == -1) { | |
1b6bf175 | 581 | ext2fs_icount_decrement(ctx->inode_count, ino, 0); |
c1faf9cc TT |
582 | if (inode.i_links_count == 0) |
583 | return 0; | |
1b6bf175 | 584 | ext2fs_icount_decrement(ctx->inode_link_info, ino, 0); |
c1faf9cc | 585 | inode.i_links_count--; |
21c84b71 | 586 | } |
efc6f628 | 587 | |
3839e657 TT |
588 | retval = ext2fs_write_inode(fs, ino, &inode); |
589 | if (retval) | |
590 | return retval; | |
591 | ||
592 | return 0; | |
593 | } | |
594 | ||
595 | /* | |
596 | * Fix parent --- this routine fixes up the parent of a directory. | |
597 | */ | |
598 | struct fix_dotdot_struct { | |
599 | ext2_filsys fs; | |
86c627ec | 600 | ext2_ino_t parent; |
3839e657 | 601 | int done; |
1b6bf175 | 602 | e2fsck_t ctx; |
3839e657 TT |
603 | }; |
604 | ||
605 | static int fix_dotdot_proc(struct ext2_dir_entry *dirent, | |
54434927 TT |
606 | int offset EXT2FS_ATTR((unused)), |
607 | int blocksize EXT2FS_ATTR((unused)), | |
608 | char *buf EXT2FS_ATTR((unused)), | |
54dc7ca2 | 609 | void *priv_data) |
3839e657 | 610 | { |
54dc7ca2 | 611 | struct fix_dotdot_struct *fp = (struct fix_dotdot_struct *) priv_data; |
3839e657 | 612 | errcode_t retval; |
1b6bf175 | 613 | struct problem_context pctx; |
3839e657 | 614 | |
b6f79831 | 615 | if ((dirent->name_len & 0xFF) != 2) |
3839e657 TT |
616 | return 0; |
617 | if (strncmp(dirent->name, "..", 2)) | |
618 | return 0; | |
3839e657 | 619 | |
1b6bf175 | 620 | clear_problem_context(&pctx); |
efc6f628 | 621 | |
b0700a1b | 622 | retval = e2fsck_adjust_inode_count(fp->ctx, dirent->inode, -1); |
1b6bf175 TT |
623 | if (retval) { |
624 | pctx.errcode = retval; | |
625 | fix_problem(fp->ctx, PR_3_ADJUST_INODE, &pctx); | |
626 | } | |
b0700a1b | 627 | retval = e2fsck_adjust_inode_count(fp->ctx, fp->parent, 1); |
1b6bf175 TT |
628 | if (retval) { |
629 | pctx.errcode = retval; | |
630 | fix_problem(fp->ctx, PR_3_ADJUST_INODE, &pctx); | |
631 | } | |
3839e657 | 632 | dirent->inode = fp->parent; |
56c8c592 TT |
633 | if (fp->ctx->fs->super->s_feature_incompat & |
634 | EXT2_FEATURE_INCOMPAT_FILETYPE) | |
efc6f628 | 635 | dirent->name_len = (dirent->name_len & 0xFF) | |
56c8c592 TT |
636 | (EXT2_FT_DIR << 8); |
637 | else | |
638 | dirent->name_len = dirent->name_len & 0xFF; | |
3839e657 TT |
639 | |
640 | fp->done++; | |
641 | return DIRENT_ABORT | DIRENT_CHANGED; | |
642 | } | |
643 | ||
28db82a8 | 644 | static void fix_dotdot(e2fsck_t ctx, ext2_ino_t ino, ext2_ino_t parent) |
3839e657 | 645 | { |
1b6bf175 | 646 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
647 | errcode_t retval; |
648 | struct fix_dotdot_struct fp; | |
1b6bf175 | 649 | struct problem_context pctx; |
3839e657 TT |
650 | |
651 | fp.fs = fs; | |
652 | fp.parent = parent; | |
653 | fp.done = 0; | |
1b6bf175 | 654 | fp.ctx = ctx; |
3839e657 TT |
655 | |
656 | #if 0 | |
28db82a8 | 657 | printf("Fixing '..' of inode %lu to be %lu...\n", ino, parent); |
3839e657 | 658 | #endif |
efc6f628 | 659 | |
28db82a8 TT |
660 | clear_problem_context(&pctx); |
661 | pctx.ino = ino; | |
662 | retval = ext2fs_dir_iterate(fs, ino, DIRENT_FLAG_INCLUDE_EMPTY, | |
3839e657 TT |
663 | 0, fix_dotdot_proc, &fp); |
664 | if (retval || !fp.done) { | |
1b6bf175 TT |
665 | pctx.errcode = retval; |
666 | fix_problem(ctx, retval ? PR_3_FIX_PARENT_ERR : | |
667 | PR_3_FIX_PARENT_NOFIND, &pctx); | |
3839e657 TT |
668 | ext2fs_unmark_valid(fs); |
669 | } | |
28db82a8 TT |
670 | (void) e2fsck_dir_info_set_dotdot(ctx, ino, parent); |
671 | if (e2fsck_dir_info_set_parent(ctx, ino, ctx->lost_and_found)) | |
672 | fix_problem(ctx, PR_3_NO_DIRINFO, &pctx); | |
673 | ||
3839e657 TT |
674 | return; |
675 | } | |
676 | ||
677 | /* | |
678 | * These routines are responsible for expanding a /lost+found if it is | |
679 | * too small. | |
680 | */ | |
681 | ||
682 | struct expand_dir_struct { | |
6dc64392 VAH |
683 | blk64_t num; |
684 | e2_blkcnt_t guaranteed_size; | |
685 | blk64_t newblocks; | |
686 | blk64_t last_block; | |
c1faf9cc TT |
687 | errcode_t err; |
688 | e2fsck_t ctx; | |
3839e657 TT |
689 | }; |
690 | ||
691 | static int expand_dir_proc(ext2_filsys fs, | |
6dc64392 | 692 | blk64_t *blocknr, |
133a56dc | 693 | e2_blkcnt_t blockcnt, |
6dc64392 | 694 | blk64_t ref_block EXT2FS_ATTR((unused)), |
54434927 | 695 | int ref_offset EXT2FS_ATTR((unused)), |
54dc7ca2 | 696 | void *priv_data) |
3839e657 | 697 | { |
54dc7ca2 | 698 | struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data; |
c5d2f50d | 699 | blk64_t new_blk; |
6dc64392 | 700 | static blk64_t last_blk = 0; |
3839e657 TT |
701 | char *block; |
702 | errcode_t retval; | |
1b6bf175 TT |
703 | e2fsck_t ctx; |
704 | ||
705 | ctx = es->ctx; | |
efc6f628 | 706 | |
b7a00563 TT |
707 | if (es->guaranteed_size && blockcnt >= es->guaranteed_size) |
708 | return BLOCK_ABORT; | |
709 | ||
710 | if (blockcnt > 0) | |
711 | es->last_block = blockcnt; | |
3839e657 TT |
712 | if (*blocknr) { |
713 | last_blk = *blocknr; | |
714 | return 0; | |
715 | } | |
0047255f DW |
716 | |
717 | if (blockcnt && | |
718 | (EXT2FS_B2C(fs, last_blk) == EXT2FS_B2C(fs, last_blk + 1))) | |
719 | new_blk = last_blk + 1; | |
720 | else { | |
721 | last_blk &= ~EXT2FS_CLUSTER_MASK(fs); | |
722 | retval = ext2fs_new_block2(fs, last_blk, ctx->block_found_map, | |
723 | &new_blk); | |
724 | if (retval) { | |
725 | es->err = retval; | |
726 | return BLOCK_ABORT; | |
727 | } | |
728 | es->newblocks++; | |
729 | ext2fs_block_alloc_stats2(fs, new_blk, +1); | |
3839e657 | 730 | } |
0047255f DW |
731 | last_blk = new_blk; |
732 | ||
3839e657 TT |
733 | if (blockcnt > 0) { |
734 | retval = ext2fs_new_dir_block(fs, 0, 0, &block); | |
735 | if (retval) { | |
736 | es->err = retval; | |
737 | return BLOCK_ABORT; | |
738 | } | |
b7a00563 | 739 | es->num--; |
7bef6d52 | 740 | retval = ext2fs_write_dir_block3(fs, new_blk, block, 0); |
3839e657 | 741 | } else { |
c4e3d3f3 | 742 | retval = ext2fs_get_mem(fs->blocksize, &block); |
08b21301 TT |
743 | if (retval) { |
744 | es->err = retval; | |
3839e657 TT |
745 | return BLOCK_ABORT; |
746 | } | |
747 | memset(block, 0, fs->blocksize); | |
24a117ab | 748 | retval = io_channel_write_blk64(fs->io, new_blk, 1, block); |
efc6f628 | 749 | } |
3839e657 TT |
750 | if (retval) { |
751 | es->err = retval; | |
752 | return BLOCK_ABORT; | |
753 | } | |
c4e3d3f3 | 754 | ext2fs_free_mem(&block); |
3839e657 | 755 | *blocknr = new_blk; |
c5d2f50d | 756 | ext2fs_mark_block_bitmap2(ctx->block_found_map, new_blk); |
efc6f628 | 757 | |
b7a00563 | 758 | if (es->num == 0) |
3839e657 TT |
759 | return (BLOCK_CHANGED | BLOCK_ABORT); |
760 | else | |
761 | return BLOCK_CHANGED; | |
762 | } | |
763 | ||
4b58df1a DW |
764 | /* |
765 | * Ensure that all blocks are marked in the block_found_map, since it's | |
766 | * possible that the library allocated an extent node block or a block map | |
767 | * block during the directory rebuilding; these new allocations are not | |
768 | * captured in block_found_map. This is bad since we could later use | |
769 | * block_found_map to allocate more blocks. | |
770 | */ | |
771 | static int find_new_blocks_proc(ext2_filsys fs, | |
772 | blk64_t *blocknr, | |
773 | e2_blkcnt_t blockcnt, | |
774 | blk64_t ref_block EXT2FS_ATTR((unused)), | |
775 | int ref_offset EXT2FS_ATTR((unused)), | |
776 | void *priv_data) | |
777 | { | |
778 | struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data; | |
779 | e2fsck_t ctx = es->ctx; | |
780 | ||
781 | ext2fs_mark_block_bitmap2(ctx->block_found_map, *blocknr); | |
782 | return 0; | |
783 | } | |
784 | ||
b7a00563 TT |
785 | errcode_t e2fsck_expand_directory(e2fsck_t ctx, ext2_ino_t dir, |
786 | int num, int guaranteed_size) | |
3839e657 | 787 | { |
1b6bf175 | 788 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
789 | errcode_t retval; |
790 | struct expand_dir_struct es; | |
791 | struct ext2_inode inode; | |
4b58df1a | 792 | blk64_t sz, before, after; |
efc6f628 | 793 | |
3839e657 TT |
794 | if (!(fs->flags & EXT2_FLAG_RW)) |
795 | return EXT2_ET_RO_FILSYS; | |
796 | ||
b8647faa TT |
797 | /* |
798 | * Read the inode and block bitmaps in; we'll be messing with | |
799 | * them. | |
800 | */ | |
801 | e2fsck_read_bitmaps(ctx); | |
c1faf9cc | 802 | |
3839e657 TT |
803 | retval = ext2fs_check_directory(fs, dir); |
804 | if (retval) | |
805 | return retval; | |
efc6f628 | 806 | |
b7a00563 TT |
807 | es.num = num; |
808 | es.guaranteed_size = guaranteed_size; | |
809 | es.last_block = 0; | |
3839e657 | 810 | es.err = 0; |
c1faf9cc | 811 | es.newblocks = 0; |
1b6bf175 | 812 | es.ctx = ctx; |
efc6f628 | 813 | |
4b58df1a | 814 | before = ext2fs_free_blocks_count(fs->super); |
6dc64392 | 815 | retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_APPEND, |
133a56dc | 816 | 0, expand_dir_proc, &es); |
3839e657 TT |
817 | |
818 | if (es.err) | |
819 | return es.err; | |
4b58df1a DW |
820 | after = ext2fs_free_blocks_count(fs->super); |
821 | ||
822 | /* | |
823 | * If the free block count has dropped by more than the blocks we | |
824 | * allocated ourselves, then we must've allocated some extent/map | |
825 | * blocks. Therefore, we must iterate this dir's blocks again to | |
826 | * ensure that all newly allocated blocks are captured in | |
827 | * block_found_map. | |
828 | */ | |
829 | if ((before - after) > es.newblocks) { | |
830 | retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY, | |
831 | 0, find_new_blocks_proc, &es); | |
832 | if (es.err) | |
833 | return es.err; | |
834 | } | |
3839e657 TT |
835 | |
836 | /* | |
837 | * Update the size and block count fields in the inode. | |
838 | */ | |
839 | retval = ext2fs_read_inode(fs, dir, &inode); | |
840 | if (retval) | |
841 | return retval; | |
efc6f628 | 842 | |
4dbfd79d DW |
843 | sz = (es.last_block + 1) * fs->blocksize; |
844 | inode.i_size = sz; | |
845 | inode.i_size_high = sz >> 32; | |
1ca1059f | 846 | ext2fs_iblk_add_blocks(fs, &inode, es.newblocks); |
624e4a64 | 847 | quota_data_add(ctx->qctx, &inode, dir, es.newblocks * fs->blocksize); |
3839e657 | 848 | |
08b21301 | 849 | e2fsck_write_inode(ctx, dir, &inode, "expand_directory"); |
3839e657 TT |
850 | |
851 | return 0; | |
852 | } | |
b7a00563 | 853 |