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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% | |
3839e657 TT |
10 | * |
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". | |
17 | * | |
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. | |
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 | ||
50e1e10f TT |
37 | #ifdef HAVE_ERRNO_H |
38 | #include <errno.h> | |
39 | #endif | |
3839e657 TT |
40 | |
41 | #include "e2fsck.h" | |
21c84b71 | 42 | #include "problem.h" |
3839e657 | 43 | |
1b6bf175 | 44 | static void check_root(e2fsck_t ctx); |
28ffafb0 TT |
45 | static int check_directory(e2fsck_t ctx, struct dir_info *dir, |
46 | struct problem_context *pctx); | |
86c627ec TT |
47 | static void fix_dotdot(e2fsck_t ctx, struct dir_info *dir, ext2_ino_t parent); |
48 | static errcode_t adjust_inode_count(e2fsck_t ctx, ext2_ino_t ino, int adj); | |
3839e657 | 49 | |
a02ce9df TT |
50 | static ext2fs_inode_bitmap inode_loop_detect = 0; |
51 | static ext2fs_inode_bitmap inode_done_map = 0; | |
3839e657 | 52 | |
08b21301 | 53 | void e2fsck_pass3(e2fsck_t ctx) |
3839e657 | 54 | { |
1b6bf175 | 55 | ext2_filsys fs = ctx->fs; |
3839e657 | 56 | int i; |
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 | |
8bf191e8 | 64 | #ifdef RESOURCE_TRACK |
3839e657 | 65 | init_resource_track(&rtrack); |
8bf191e8 | 66 | #endif |
3839e657 | 67 | |
1b6bf175 TT |
68 | clear_problem_context(&pctx); |
69 | ||
3839e657 TT |
70 | #ifdef MTRACE |
71 | mtrace_print("Pass 3"); | |
72 | #endif | |
73 | ||
1b6bf175 TT |
74 | if (!(ctx->options & E2F_OPT_PREEN)) |
75 | fix_problem(ctx, PR_3_PASS_HEADER, &pctx); | |
3839e657 TT |
76 | |
77 | /* | |
78 | * Allocate some bitmaps to do loop detection. | |
79 | */ | |
0c4a0726 | 80 | pctx.errcode = ext2fs_allocate_inode_bitmap(fs, _("inode done bitmap"), |
1b6bf175 TT |
81 | &inode_done_map); |
82 | if (pctx.errcode) { | |
83 | pctx.num = 2; | |
84 | fix_problem(ctx, PR_3_ALLOCATE_IBITMAP_ERROR, &pctx); | |
08b21301 | 85 | ctx->flags |= E2F_FLAG_ABORT; |
a02ce9df | 86 | goto abort_exit; |
3839e657 | 87 | } |
8bf191e8 | 88 | #ifdef RESOURCE_TRACK |
5596defa TT |
89 | if (ctx->options & E2F_OPT_TIME) { |
90 | e2fsck_clear_progbar(ctx); | |
0c4a0726 | 91 | print_resource_track(_("Peak memory"), &ctx->global_rtrack); |
5596defa | 92 | } |
8bf191e8 | 93 | #endif |
3839e657 | 94 | |
1b6bf175 | 95 | check_root(ctx); |
a02ce9df TT |
96 | if (ctx->flags & E2F_FLAG_SIGNAL_MASK) |
97 | goto abort_exit; | |
08b21301 | 98 | |
f3db3566 | 99 | ext2fs_mark_inode_bitmap(inode_done_map, EXT2_ROOT_INO); |
3839e657 | 100 | |
7f813ba3 | 101 | maxdirs = e2fsck_get_num_dirinfo(ctx); |
f75c28de | 102 | count = 1; |
f8188fff | 103 | |
f75c28de | 104 | if (ctx->progress) |
7f813ba3 | 105 | if ((ctx->progress)(ctx, 3, 0, maxdirs)) |
f75c28de TT |
106 | goto abort_exit; |
107 | ||
08b21301 | 108 | for (i=0; (dir = e2fsck_dir_info_iter(ctx, &i)) != 0;) { |
4cae0452 TT |
109 | if (ctx->flags & E2F_FLAG_SIGNAL_MASK) |
110 | goto abort_exit; | |
111 | if (ctx->progress && (ctx->progress)(ctx, 3, count++, maxdirs)) | |
112 | goto abort_exit; | |
1b6bf175 | 113 | if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, dir->ino)) |
28ffafb0 TT |
114 | if (check_directory(ctx, dir, &pctx)) |
115 | goto abort_exit; | |
3839e657 | 116 | } |
a02ce9df | 117 | |
5a679c8f TT |
118 | /* |
119 | * Force the creation of /lost+found if not present | |
120 | */ | |
121 | if ((ctx->flags & E2F_OPT_READONLY) == 0) | |
850d05e9 | 122 | e2fsck_get_lost_and_found(ctx, 1); |
5a679c8f | 123 | |
850d05e9 TT |
124 | /* |
125 | * If there are any directories that need to be indexed or | |
126 | * optimized, do it here. | |
127 | */ | |
128 | e2fsck_rehash_directories(ctx); | |
129 | ||
a02ce9df | 130 | abort_exit: |
08b21301 | 131 | e2fsck_free_dir_info(ctx); |
28ffafb0 | 132 | if (inode_loop_detect) { |
a02ce9df | 133 | ext2fs_free_inode_bitmap(inode_loop_detect); |
28ffafb0 TT |
134 | inode_loop_detect = 0; |
135 | } | |
136 | if (inode_done_map) { | |
a02ce9df | 137 | ext2fs_free_inode_bitmap(inode_done_map); |
28ffafb0 TT |
138 | inode_done_map = 0; |
139 | } | |
b7a00563 | 140 | |
8bf191e8 | 141 | #ifdef RESOURCE_TRACK |
5596defa TT |
142 | if (ctx->options & E2F_OPT_TIME2) { |
143 | e2fsck_clear_progbar(ctx); | |
0c4a0726 | 144 | print_resource_track(_("Pass 3"), &rtrack); |
5596defa | 145 | } |
8bf191e8 | 146 | #endif |
3839e657 TT |
147 | } |
148 | ||
149 | /* | |
150 | * This makes sure the root inode is present; if not, we ask if the | |
151 | * user wants us to create it. Not creating it is a fatal error. | |
152 | */ | |
1b6bf175 | 153 | static void check_root(e2fsck_t ctx) |
3839e657 | 154 | { |
1b6bf175 | 155 | ext2_filsys fs = ctx->fs; |
3839e657 | 156 | blk_t blk; |
3839e657 TT |
157 | struct ext2_inode inode; |
158 | char * block; | |
1b6bf175 | 159 | struct problem_context pctx; |
3839e657 | 160 | |
1b6bf175 TT |
161 | clear_problem_context(&pctx); |
162 | ||
163 | if (ext2fs_test_inode_bitmap(ctx->inode_used_map, EXT2_ROOT_INO)) { | |
3839e657 | 164 | /* |
08b21301 | 165 | * If the root inode is not a directory, die here. The |
3839e657 TT |
166 | * user must have answered 'no' in pass1 when we |
167 | * offered to clear it. | |
168 | */ | |
1b6bf175 | 169 | if (!(ext2fs_test_inode_bitmap(ctx->inode_dir_map, |
f8188fff TT |
170 | EXT2_ROOT_INO))) { |
171 | fix_problem(ctx, PR_3_ROOT_NOT_DIR_ABORT, &pctx); | |
172 | ctx->flags |= E2F_FLAG_ABORT; | |
173 | } | |
3839e657 TT |
174 | return; |
175 | } | |
176 | ||
f8188fff TT |
177 | if (!fix_problem(ctx, PR_3_NO_ROOT_INODE, &pctx)) { |
178 | fix_problem(ctx, PR_3_NO_ROOT_INODE_ABORT, &pctx); | |
179 | ctx->flags |= E2F_FLAG_ABORT; | |
180 | return; | |
181 | } | |
3839e657 | 182 | |
f8188fff | 183 | e2fsck_read_bitmaps(ctx); |
3839e657 TT |
184 | |
185 | /* | |
186 | * First, find a free block | |
187 | */ | |
1b6bf175 TT |
188 | pctx.errcode = ext2fs_new_block(fs, 0, ctx->block_found_map, &blk); |
189 | if (pctx.errcode) { | |
190 | pctx.str = "ext2fs_new_block"; | |
191 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
08b21301 TT |
192 | ctx->flags |= E2F_FLAG_ABORT; |
193 | return; | |
3839e657 | 194 | } |
1b6bf175 | 195 | ext2fs_mark_block_bitmap(ctx->block_found_map, blk); |
f3db3566 | 196 | ext2fs_mark_block_bitmap(fs->block_map, blk); |
3839e657 TT |
197 | ext2fs_mark_bb_dirty(fs); |
198 | ||
199 | /* | |
200 | * Now let's create the actual data block for the inode | |
201 | */ | |
1b6bf175 TT |
202 | pctx.errcode = ext2fs_new_dir_block(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, |
203 | &block); | |
204 | if (pctx.errcode) { | |
205 | pctx.str = "ext2fs_new_dir_block"; | |
206 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
08b21301 TT |
207 | ctx->flags |= E2F_FLAG_ABORT; |
208 | return; | |
3839e657 TT |
209 | } |
210 | ||
1b6bf175 TT |
211 | pctx.errcode = ext2fs_write_dir_block(fs, blk, block); |
212 | if (pctx.errcode) { | |
213 | pctx.str = "ext2fs_write_dir_block"; | |
214 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
08b21301 TT |
215 | ctx->flags |= E2F_FLAG_ABORT; |
216 | return; | |
3839e657 | 217 | } |
08b21301 | 218 | ext2fs_free_mem((void **) &block); |
3839e657 TT |
219 | |
220 | /* | |
221 | * Set up the inode structure | |
222 | */ | |
223 | memset(&inode, 0, sizeof(inode)); | |
224 | inode.i_mode = 040755; | |
225 | inode.i_size = fs->blocksize; | |
226 | inode.i_atime = inode.i_ctime = inode.i_mtime = time(0); | |
227 | inode.i_links_count = 2; | |
228 | inode.i_blocks = fs->blocksize / 512; | |
229 | inode.i_block[0] = blk; | |
230 | ||
231 | /* | |
232 | * Write out the inode. | |
233 | */ | |
1b6bf175 TT |
234 | pctx.errcode = ext2fs_write_inode(fs, EXT2_ROOT_INO, &inode); |
235 | if (pctx.errcode) { | |
236 | pctx.str = "ext2fs_write_inode"; | |
237 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
08b21301 TT |
238 | ctx->flags |= E2F_FLAG_ABORT; |
239 | return; | |
3839e657 TT |
240 | } |
241 | ||
242 | /* | |
243 | * Miscellaneous bookkeeping... | |
244 | */ | |
08b21301 | 245 | e2fsck_add_dir_info(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO); |
1b6bf175 TT |
246 | ext2fs_icount_store(ctx->inode_count, EXT2_ROOT_INO, 2); |
247 | ext2fs_icount_store(ctx->inode_link_info, EXT2_ROOT_INO, 2); | |
3839e657 | 248 | |
1b6bf175 TT |
249 | ext2fs_mark_inode_bitmap(ctx->inode_used_map, EXT2_ROOT_INO); |
250 | ext2fs_mark_inode_bitmap(ctx->inode_dir_map, EXT2_ROOT_INO); | |
f3db3566 | 251 | ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_ROOT_INO); |
3839e657 TT |
252 | ext2fs_mark_ib_dirty(fs); |
253 | } | |
254 | ||
255 | /* | |
256 | * This subroutine is responsible for making sure that a particular | |
257 | * directory is connected to the root; if it isn't we trace it up as | |
258 | * far as we can go, and then offer to connect the resulting parent to | |
259 | * the lost+found. We have to do loop detection; if we ever discover | |
260 | * a loop, we treat that as a disconnected directory and offer to | |
261 | * reparent it to lost+found. | |
28ffafb0 TT |
262 | * |
263 | * However, loop detection is expensive, because for very large | |
264 | * filesystems, the inode_loop_detect bitmap is huge, and clearing it | |
265 | * is non-trivial. Loops in filesystems are also a rare error case, | |
266 | * and we shouldn't optimize for error cases. So we try two passes of | |
267 | * the algorithm. The first time, we ignore loop detection and merely | |
268 | * increment a counter; if the counter exceeds some extreme threshold, | |
269 | * then we try again with the loop detection bitmap enabled. | |
3839e657 | 270 | */ |
28ffafb0 TT |
271 | static int check_directory(e2fsck_t ctx, struct dir_info *dir, |
272 | struct problem_context *pctx) | |
3839e657 | 273 | { |
28ffafb0 | 274 | ext2_filsys fs = ctx->fs; |
21c84b71 | 275 | struct dir_info *p = dir; |
28ffafb0 | 276 | int loop_pass = 0, parent_count = 0; |
3839e657 | 277 | |
7f813ba3 | 278 | if (!p) |
28ffafb0 | 279 | return 0; |
7f813ba3 | 280 | |
28ffafb0 | 281 | while (1) { |
3839e657 TT |
282 | /* |
283 | * Mark this inode as being "done"; by the time we | |
284 | * return from this function, the inode we either be | |
285 | * verified as being connected to the directory tree, | |
286 | * or we will have offered to reconnect this to | |
287 | * lost+found. | |
28ffafb0 TT |
288 | * |
289 | * If it was marked done already, then we've reached a | |
290 | * parent we've already checked. | |
3839e657 | 291 | */ |
28ffafb0 TT |
292 | if (ext2fs_mark_inode_bitmap(inode_done_map, p->ino)) |
293 | break; | |
7f813ba3 | 294 | |
3839e657 TT |
295 | /* |
296 | * If this directory doesn't have a parent, or we've | |
297 | * seen the parent once already, then offer to | |
298 | * reparent it to lost+found | |
299 | */ | |
300 | if (!p->parent || | |
28ffafb0 TT |
301 | (loop_pass && |
302 | (ext2fs_test_inode_bitmap(inode_loop_detect, | |
303 | p->parent)))) { | |
7f813ba3 TT |
304 | pctx->ino = p->ino; |
305 | if (fix_problem(ctx, PR_3_UNCONNECTED_DIR, pctx)) { | |
306 | if (e2fsck_reconnect_file(ctx, p->ino)) | |
307 | ext2fs_unmark_valid(fs); | |
308 | else { | |
850d05e9 TT |
309 | p->parent = ctx->lost_and_found; |
310 | fix_dotdot(ctx, p, ctx->lost_and_found); | |
7f813ba3 TT |
311 | } |
312 | } | |
3839e657 | 313 | break; |
7f813ba3 | 314 | } |
08b21301 | 315 | p = e2fsck_get_dir_info(ctx, p->parent); |
7f813ba3 TT |
316 | if (!p) { |
317 | fix_problem(ctx, PR_3_NO_DIRINFO, pctx); | |
28ffafb0 TT |
318 | return 0; |
319 | } | |
320 | if (loop_pass) { | |
321 | ext2fs_mark_inode_bitmap(inode_loop_detect, | |
322 | p->ino); | |
323 | } else if (parent_count++ > 2048) { | |
324 | /* | |
325 | * If we've run into a path depth that's | |
326 | * greater than 2048, try again with the inode | |
327 | * loop bitmap turned on and start from the | |
328 | * top. | |
329 | */ | |
330 | loop_pass = 1; | |
331 | if (inode_loop_detect) | |
332 | ext2fs_clear_inode_bitmap(inode_loop_detect); | |
333 | else { | |
334 | pctx->errcode = ext2fs_allocate_inode_bitmap(fs, _("inode loop detection bitmap"), &inode_loop_detect); | |
335 | if (pctx->errcode) { | |
336 | pctx->num = 1; | |
337 | fix_problem(ctx, | |
338 | PR_3_ALLOCATE_IBITMAP_ERROR, pctx); | |
339 | ctx->flags |= E2F_FLAG_ABORT; | |
340 | return -1; | |
341 | } | |
342 | } | |
343 | p = dir; | |
3839e657 | 344 | } |
21c84b71 | 345 | } |
3839e657 TT |
346 | |
347 | /* | |
348 | * Make sure that .. and the parent directory are the same; | |
349 | * offer to fix it if not. | |
350 | */ | |
3839e657 | 351 | if (dir->parent != dir->dotdot) { |
21c84b71 TT |
352 | pctx->ino = dir->ino; |
353 | pctx->ino2 = dir->dotdot; | |
354 | pctx->dir = dir->parent; | |
1b6bf175 TT |
355 | if (fix_problem(ctx, PR_3_BAD_DOT_DOT, pctx)) |
356 | fix_dotdot(ctx, dir, dir->parent); | |
3839e657 | 357 | } |
28ffafb0 | 358 | return 0; |
b7a00563 | 359 | } |
3839e657 TT |
360 | |
361 | /* | |
362 | * This routine gets the lost_and_found inode, making it a directory | |
363 | * if necessary | |
364 | */ | |
850d05e9 | 365 | ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix) |
3839e657 | 366 | { |
1b6bf175 | 367 | ext2_filsys fs = ctx->fs; |
86c627ec | 368 | ext2_ino_t ino; |
3839e657 TT |
369 | blk_t blk; |
370 | errcode_t retval; | |
371 | struct ext2_inode inode; | |
372 | char * block; | |
53ef44c4 | 373 | static const char name[] = "lost+found"; |
1b6bf175 | 374 | struct problem_context pctx; |
4a9f5936 | 375 | struct dir_info *dirinfo; |
3839e657 | 376 | |
850d05e9 TT |
377 | if (ctx->lost_and_found) |
378 | return ctx->lost_and_found; | |
379 | ||
1b6bf175 TT |
380 | clear_problem_context(&pctx); |
381 | ||
21c84b71 TT |
382 | retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, |
383 | sizeof(name)-1, 0, &ino); | |
850d05e9 TT |
384 | if (retval && !fix) |
385 | return 0; | |
4a9f5936 | 386 | if (!retval) { |
850d05e9 TT |
387 | if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, ino)) { |
388 | ctx->lost_and_found = ino; | |
4a9f5936 | 389 | return ino; |
850d05e9 TT |
390 | } |
391 | ||
4a9f5936 | 392 | /* Lost+found isn't a directory! */ |
850d05e9 TT |
393 | if (!fix) |
394 | return 0; | |
4a9f5936 TT |
395 | pctx.ino = ino; |
396 | if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx)) | |
397 | return 0; | |
398 | ||
c54b3c3c | 399 | /* OK, unlink the old /lost+found file. */ |
4a9f5936 TT |
400 | pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0); |
401 | if (pctx.errcode) { | |
402 | pctx.str = "ext2fs_unlink"; | |
403 | fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); | |
404 | return 0; | |
405 | } | |
406 | dirinfo = e2fsck_get_dir_info(ctx, ino); | |
407 | if (dirinfo) | |
408 | dirinfo->parent = 0; | |
409 | adjust_inode_count(ctx, ino, -1); | |
410 | } else if (retval != EXT2_ET_FILE_NOT_FOUND) { | |
1b6bf175 TT |
411 | pctx.errcode = retval; |
412 | fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx); | |
413 | } | |
414 | if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0)) | |
3839e657 | 415 | return 0; |
3839e657 TT |
416 | |
417 | /* | |
418 | * Read the inode and block bitmaps in; we'll be messing with | |
419 | * them. | |
420 | */ | |
f8188fff | 421 | e2fsck_read_bitmaps(ctx); |
3839e657 TT |
422 | |
423 | /* | |
424 | * First, find a free block | |
425 | */ | |
1b6bf175 | 426 | retval = ext2fs_new_block(fs, 0, ctx->block_found_map, &blk); |
3839e657 | 427 | if (retval) { |
1b6bf175 TT |
428 | pctx.errcode = retval; |
429 | fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx); | |
3839e657 TT |
430 | return 0; |
431 | } | |
1b6bf175 | 432 | ext2fs_mark_block_bitmap(ctx->block_found_map, blk); |
0684a4f3 | 433 | ext2fs_block_alloc_stats(fs, blk, +1); |
3839e657 TT |
434 | |
435 | /* | |
436 | * Next find a free inode. | |
437 | */ | |
1b6bf175 TT |
438 | retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040755, |
439 | ctx->inode_used_map, &ino); | |
3839e657 | 440 | if (retval) { |
1b6bf175 TT |
441 | pctx.errcode = retval; |
442 | fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx); | |
3839e657 TT |
443 | return 0; |
444 | } | |
1b6bf175 TT |
445 | ext2fs_mark_inode_bitmap(ctx->inode_used_map, ino); |
446 | ext2fs_mark_inode_bitmap(ctx->inode_dir_map, ino); | |
0684a4f3 | 447 | ext2fs_inode_alloc_stats2(fs, ino, +1, 1); |
3839e657 TT |
448 | |
449 | /* | |
450 | * Now let's create the actual data block for the inode | |
451 | */ | |
452 | retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block); | |
453 | if (retval) { | |
1b6bf175 TT |
454 | pctx.errcode = retval; |
455 | fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx); | |
3839e657 TT |
456 | return 0; |
457 | } | |
458 | ||
50e1e10f | 459 | retval = ext2fs_write_dir_block(fs, blk, block); |
08b21301 | 460 | ext2fs_free_mem((void **) &block); |
3839e657 | 461 | if (retval) { |
1b6bf175 TT |
462 | pctx.errcode = retval; |
463 | fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx); | |
3839e657 TT |
464 | return 0; |
465 | } | |
3839e657 TT |
466 | |
467 | /* | |
468 | * Set up the inode structure | |
469 | */ | |
470 | memset(&inode, 0, sizeof(inode)); | |
471 | inode.i_mode = 040755; | |
472 | inode.i_size = fs->blocksize; | |
473 | inode.i_atime = inode.i_ctime = inode.i_mtime = time(0); | |
474 | inode.i_links_count = 2; | |
475 | inode.i_blocks = fs->blocksize / 512; | |
476 | inode.i_block[0] = blk; | |
477 | ||
478 | /* | |
479 | * Next, write out the inode. | |
480 | */ | |
1b6bf175 TT |
481 | pctx.errcode = ext2fs_write_inode(fs, ino, &inode); |
482 | if (pctx.errcode) { | |
483 | pctx.str = "ext2fs_write_inode"; | |
484 | fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); | |
3839e657 TT |
485 | return 0; |
486 | } | |
487 | /* | |
488 | * Finally, create the directory link | |
489 | */ | |
6fdc7a32 | 490 | pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR); |
1b6bf175 TT |
491 | if (pctx.errcode) { |
492 | pctx.str = "ext2fs_link"; | |
493 | fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); | |
3839e657 TT |
494 | return 0; |
495 | } | |
496 | ||
497 | /* | |
498 | * Miscellaneous bookkeeping that needs to be kept straight. | |
499 | */ | |
08b21301 | 500 | e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO); |
53ef44c4 | 501 | adjust_inode_count(ctx, EXT2_ROOT_INO, 1); |
1b6bf175 TT |
502 | ext2fs_icount_store(ctx->inode_count, ino, 2); |
503 | ext2fs_icount_store(ctx->inode_link_info, ino, 2); | |
850d05e9 | 504 | ctx->lost_and_found = ino; |
3839e657 | 505 | #if 0 |
f3db3566 | 506 | printf("/lost+found created; inode #%lu\n", ino); |
3839e657 TT |
507 | #endif |
508 | return ino; | |
509 | } | |
510 | ||
511 | /* | |
512 | * This routine will connect a file to lost+found | |
513 | */ | |
86c627ec | 514 | int e2fsck_reconnect_file(e2fsck_t ctx, ext2_ino_t ino) |
3839e657 | 515 | { |
1b6bf175 | 516 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
517 | errcode_t retval; |
518 | char name[80]; | |
1b6bf175 | 519 | struct problem_context pctx; |
6fdc7a32 TT |
520 | struct ext2_inode inode; |
521 | int file_type = 0; | |
1b6bf175 TT |
522 | |
523 | clear_problem_context(&pctx); | |
6fdc7a32 | 524 | pctx.ino = ino; |
1b6bf175 | 525 | |
850d05e9 TT |
526 | if (!ctx->bad_lost_and_found && !ctx->lost_and_found) { |
527 | if (e2fsck_get_lost_and_found(ctx, 1) == 0) | |
528 | ctx->bad_lost_and_found++; | |
1b6bf175 | 529 | } |
850d05e9 | 530 | if (ctx->bad_lost_and_found) { |
1b6bf175 | 531 | fix_problem(ctx, PR_3_NO_LPF, &pctx); |
3839e657 TT |
532 | return 1; |
533 | } | |
1b6bf175 | 534 | |
86c627ec | 535 | sprintf(name, "#%u", ino); |
6fdc7a32 TT |
536 | if (ext2fs_read_inode(fs, ino, &inode) == 0) |
537 | file_type = ext2_file_type(inode.i_mode); | |
850d05e9 | 538 | retval = ext2fs_link(fs, ctx->lost_and_found, name, ino, file_type); |
3839e657 | 539 | if (retval == EXT2_ET_DIR_NO_SPACE) { |
1b6bf175 | 540 | if (!fix_problem(ctx, PR_3_EXPAND_LF_DIR, &pctx)) |
3839e657 | 541 | return 1; |
850d05e9 TT |
542 | retval = e2fsck_expand_directory(ctx, ctx->lost_and_found, |
543 | 1, 0); | |
3839e657 | 544 | if (retval) { |
1b6bf175 TT |
545 | pctx.errcode = retval; |
546 | fix_problem(ctx, PR_3_CANT_EXPAND_LPF, &pctx); | |
3839e657 TT |
547 | return 1; |
548 | } | |
850d05e9 TT |
549 | retval = ext2fs_link(fs, ctx->lost_and_found, name, |
550 | ino, file_type); | |
3839e657 TT |
551 | } |
552 | if (retval) { | |
1b6bf175 TT |
553 | pctx.errcode = retval; |
554 | fix_problem(ctx, PR_3_CANT_RECONNECT, &pctx); | |
3839e657 TT |
555 | return 1; |
556 | } | |
53ef44c4 | 557 | adjust_inode_count(ctx, ino, 1); |
3839e657 TT |
558 | |
559 | return 0; | |
560 | } | |
561 | ||
562 | /* | |
563 | * Utility routine to adjust the inode counts on an inode. | |
564 | */ | |
86c627ec | 565 | static errcode_t adjust_inode_count(e2fsck_t ctx, ext2_ino_t ino, int adj) |
3839e657 | 566 | { |
1b6bf175 | 567 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
568 | errcode_t retval; |
569 | struct ext2_inode inode; | |
570 | ||
571 | if (!ino) | |
572 | return 0; | |
573 | ||
574 | retval = ext2fs_read_inode(fs, ino, &inode); | |
575 | if (retval) | |
576 | return retval; | |
577 | ||
578 | #if 0 | |
f3db3566 | 579 | printf("Adjusting link count for inode %lu by %d (from %d)\n", ino, adj, |
3839e657 TT |
580 | inode.i_links_count); |
581 | #endif | |
582 | ||
21c84b71 | 583 | if (adj == 1) { |
1b6bf175 | 584 | ext2fs_icount_increment(ctx->inode_count, ino, 0); |
c1faf9cc TT |
585 | if (inode.i_links_count == (__u16) ~0) |
586 | return 0; | |
1b6bf175 | 587 | ext2fs_icount_increment(ctx->inode_link_info, ino, 0); |
c1faf9cc TT |
588 | inode.i_links_count++; |
589 | } else if (adj == -1) { | |
1b6bf175 | 590 | ext2fs_icount_decrement(ctx->inode_count, ino, 0); |
c1faf9cc TT |
591 | if (inode.i_links_count == 0) |
592 | return 0; | |
1b6bf175 | 593 | ext2fs_icount_decrement(ctx->inode_link_info, ino, 0); |
c1faf9cc | 594 | inode.i_links_count--; |
21c84b71 TT |
595 | } |
596 | ||
3839e657 TT |
597 | retval = ext2fs_write_inode(fs, ino, &inode); |
598 | if (retval) | |
599 | return retval; | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
604 | /* | |
605 | * Fix parent --- this routine fixes up the parent of a directory. | |
606 | */ | |
607 | struct fix_dotdot_struct { | |
608 | ext2_filsys fs; | |
86c627ec | 609 | ext2_ino_t parent; |
3839e657 | 610 | int done; |
1b6bf175 | 611 | e2fsck_t ctx; |
3839e657 TT |
612 | }; |
613 | ||
614 | static int fix_dotdot_proc(struct ext2_dir_entry *dirent, | |
615 | int offset, | |
616 | int blocksize, | |
617 | char *buf, | |
54dc7ca2 | 618 | void *priv_data) |
3839e657 | 619 | { |
54dc7ca2 | 620 | struct fix_dotdot_struct *fp = (struct fix_dotdot_struct *) priv_data; |
3839e657 | 621 | errcode_t retval; |
1b6bf175 | 622 | struct problem_context pctx; |
3839e657 | 623 | |
b6f79831 | 624 | if ((dirent->name_len & 0xFF) != 2) |
3839e657 TT |
625 | return 0; |
626 | if (strncmp(dirent->name, "..", 2)) | |
627 | return 0; | |
3839e657 | 628 | |
1b6bf175 TT |
629 | clear_problem_context(&pctx); |
630 | ||
631 | retval = adjust_inode_count(fp->ctx, dirent->inode, -1); | |
632 | if (retval) { | |
633 | pctx.errcode = retval; | |
634 | fix_problem(fp->ctx, PR_3_ADJUST_INODE, &pctx); | |
635 | } | |
636 | retval = adjust_inode_count(fp->ctx, fp->parent, 1); | |
637 | if (retval) { | |
638 | pctx.errcode = retval; | |
639 | fix_problem(fp->ctx, PR_3_ADJUST_INODE, &pctx); | |
640 | } | |
3839e657 TT |
641 | dirent->inode = fp->parent; |
642 | ||
643 | fp->done++; | |
644 | return DIRENT_ABORT | DIRENT_CHANGED; | |
645 | } | |
646 | ||
86c627ec | 647 | static void fix_dotdot(e2fsck_t ctx, struct dir_info *dir, ext2_ino_t parent) |
3839e657 | 648 | { |
1b6bf175 | 649 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
650 | errcode_t retval; |
651 | struct fix_dotdot_struct fp; | |
1b6bf175 | 652 | struct problem_context pctx; |
3839e657 TT |
653 | |
654 | fp.fs = fs; | |
655 | fp.parent = parent; | |
656 | fp.done = 0; | |
1b6bf175 | 657 | fp.ctx = ctx; |
3839e657 TT |
658 | |
659 | #if 0 | |
f3db3566 | 660 | printf("Fixing '..' of inode %lu to be %lu...\n", dir->ino, parent); |
3839e657 TT |
661 | #endif |
662 | ||
663 | retval = ext2fs_dir_iterate(fs, dir->ino, DIRENT_FLAG_INCLUDE_EMPTY, | |
664 | 0, fix_dotdot_proc, &fp); | |
665 | if (retval || !fp.done) { | |
1b6bf175 TT |
666 | clear_problem_context(&pctx); |
667 | pctx.ino = dir->ino; | |
668 | pctx.errcode = retval; | |
669 | fix_problem(ctx, retval ? PR_3_FIX_PARENT_ERR : | |
670 | PR_3_FIX_PARENT_NOFIND, &pctx); | |
3839e657 TT |
671 | ext2fs_unmark_valid(fs); |
672 | } | |
673 | dir->dotdot = parent; | |
674 | ||
675 | return; | |
676 | } | |
677 | ||
678 | /* | |
679 | * These routines are responsible for expanding a /lost+found if it is | |
680 | * too small. | |
681 | */ | |
682 | ||
683 | struct expand_dir_struct { | |
b7a00563 TT |
684 | int num; |
685 | int guaranteed_size; | |
c1faf9cc | 686 | int newblocks; |
b7a00563 | 687 | int last_block; |
c1faf9cc TT |
688 | errcode_t err; |
689 | e2fsck_t ctx; | |
3839e657 TT |
690 | }; |
691 | ||
692 | static int expand_dir_proc(ext2_filsys fs, | |
693 | blk_t *blocknr, | |
133a56dc TT |
694 | e2_blkcnt_t blockcnt, |
695 | blk_t ref_block, | |
696 | int ref_offset, | |
54dc7ca2 | 697 | void *priv_data) |
3839e657 | 698 | { |
54dc7ca2 | 699 | struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data; |
3839e657 TT |
700 | blk_t new_blk; |
701 | static blk_t last_blk = 0; | |
702 | char *block; | |
703 | errcode_t retval; | |
1b6bf175 TT |
704 | e2fsck_t ctx; |
705 | ||
706 | ctx = es->ctx; | |
3839e657 | 707 | |
b7a00563 TT |
708 | if (es->guaranteed_size && blockcnt >= es->guaranteed_size) |
709 | return BLOCK_ABORT; | |
710 | ||
711 | if (blockcnt > 0) | |
712 | es->last_block = blockcnt; | |
3839e657 TT |
713 | if (*blocknr) { |
714 | last_blk = *blocknr; | |
715 | return 0; | |
716 | } | |
1b6bf175 TT |
717 | retval = ext2fs_new_block(fs, last_blk, ctx->block_found_map, |
718 | &new_blk); | |
3839e657 TT |
719 | if (retval) { |
720 | es->err = retval; | |
721 | return BLOCK_ABORT; | |
722 | } | |
723 | if (blockcnt > 0) { | |
724 | retval = ext2fs_new_dir_block(fs, 0, 0, &block); | |
725 | if (retval) { | |
726 | es->err = retval; | |
727 | return BLOCK_ABORT; | |
728 | } | |
b7a00563 | 729 | es->num--; |
b8647faa | 730 | retval = ext2fs_write_dir_block(fs, new_blk, block); |
3839e657 | 731 | } else { |
08b21301 TT |
732 | retval = ext2fs_get_mem(fs->blocksize, (void **) &block); |
733 | if (retval) { | |
734 | es->err = retval; | |
3839e657 TT |
735 | return BLOCK_ABORT; |
736 | } | |
737 | memset(block, 0, fs->blocksize); | |
b8647faa | 738 | retval = io_channel_write_blk(fs->io, new_blk, 1, block); |
3839e657 | 739 | } |
3839e657 TT |
740 | if (retval) { |
741 | es->err = retval; | |
742 | return BLOCK_ABORT; | |
743 | } | |
08b21301 | 744 | ext2fs_free_mem((void **) &block); |
3839e657 | 745 | *blocknr = new_blk; |
1b6bf175 | 746 | ext2fs_mark_block_bitmap(ctx->block_found_map, new_blk); |
b7a00563 | 747 | ext2fs_block_alloc_stats(fs, new_blk, +1); |
c1faf9cc TT |
748 | es->newblocks++; |
749 | ||
b7a00563 | 750 | if (es->num == 0) |
3839e657 TT |
751 | return (BLOCK_CHANGED | BLOCK_ABORT); |
752 | else | |
753 | return BLOCK_CHANGED; | |
754 | } | |
755 | ||
b7a00563 TT |
756 | errcode_t e2fsck_expand_directory(e2fsck_t ctx, ext2_ino_t dir, |
757 | int num, int guaranteed_size) | |
3839e657 | 758 | { |
1b6bf175 | 759 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
760 | errcode_t retval; |
761 | struct expand_dir_struct es; | |
762 | struct ext2_inode inode; | |
763 | ||
764 | if (!(fs->flags & EXT2_FLAG_RW)) | |
765 | return EXT2_ET_RO_FILSYS; | |
766 | ||
b8647faa TT |
767 | /* |
768 | * Read the inode and block bitmaps in; we'll be messing with | |
769 | * them. | |
770 | */ | |
771 | e2fsck_read_bitmaps(ctx); | |
c1faf9cc | 772 | |
3839e657 TT |
773 | retval = ext2fs_check_directory(fs, dir); |
774 | if (retval) | |
775 | return retval; | |
776 | ||
b7a00563 TT |
777 | es.num = num; |
778 | es.guaranteed_size = guaranteed_size; | |
779 | es.last_block = 0; | |
3839e657 | 780 | es.err = 0; |
c1faf9cc | 781 | es.newblocks = 0; |
1b6bf175 | 782 | es.ctx = ctx; |
3839e657 | 783 | |
133a56dc TT |
784 | retval = ext2fs_block_iterate2(fs, dir, BLOCK_FLAG_APPEND, |
785 | 0, expand_dir_proc, &es); | |
3839e657 TT |
786 | |
787 | if (es.err) | |
788 | return es.err; | |
3839e657 TT |
789 | |
790 | /* | |
791 | * Update the size and block count fields in the inode. | |
792 | */ | |
793 | retval = ext2fs_read_inode(fs, dir, &inode); | |
794 | if (retval) | |
795 | return retval; | |
796 | ||
b7a00563 | 797 | inode.i_size = (es.last_block + 1) * fs->blocksize; |
c1faf9cc | 798 | inode.i_blocks += (fs->blocksize / 512) * es.newblocks; |
3839e657 | 799 | |
08b21301 | 800 | e2fsck_write_inode(ctx, dir, &inode, "expand_directory"); |
3839e657 TT |
801 | |
802 | return 0; | |
803 | } | |
b7a00563 | 804 |