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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 | |
b729b7df DW |
137 | if (ctx->lnf_repair_block) { |
138 | ext2fs_unmark_block_bitmap2(ctx->block_found_map, | |
139 | ctx->lnf_repair_block); | |
140 | ctx->lnf_repair_block = 0; | |
141 | } | |
142 | if (ctx->root_repair_block) { | |
143 | ext2fs_unmark_block_bitmap2(ctx->block_found_map, | |
144 | ctx->root_repair_block); | |
145 | ctx->root_repair_block = 0; | |
146 | } | |
147 | ||
9facd076 | 148 | print_resource_track(ctx, _("Pass 3"), &rtrack, ctx->fs->io); |
3839e657 TT |
149 | } |
150 | ||
151 | /* | |
152 | * This makes sure the root inode is present; if not, we ask if the | |
153 | * user wants us to create it. Not creating it is a fatal error. | |
154 | */ | |
1b6bf175 | 155 | static void check_root(e2fsck_t ctx) |
3839e657 | 156 | { |
1b6bf175 | 157 | ext2_filsys fs = ctx->fs; |
c5d2f50d | 158 | blk64_t blk; |
3839e657 TT |
159 | struct ext2_inode inode; |
160 | char * block; | |
1b6bf175 | 161 | struct problem_context pctx; |
efc6f628 | 162 | |
1b6bf175 | 163 | clear_problem_context(&pctx); |
efc6f628 | 164 | |
c5d2f50d | 165 | if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO)) { |
3839e657 | 166 | /* |
08b21301 | 167 | * If the root inode is not a directory, die here. The |
3839e657 TT |
168 | * user must have answered 'no' in pass1 when we |
169 | * offered to clear it. | |
170 | */ | |
c5d2f50d | 171 | if (!(ext2fs_test_inode_bitmap2(ctx->inode_dir_map, |
f8188fff TT |
172 | EXT2_ROOT_INO))) { |
173 | fix_problem(ctx, PR_3_ROOT_NOT_DIR_ABORT, &pctx); | |
174 | ctx->flags |= E2F_FLAG_ABORT; | |
175 | } | |
3839e657 TT |
176 | return; |
177 | } | |
178 | ||
f8188fff TT |
179 | if (!fix_problem(ctx, PR_3_NO_ROOT_INODE, &pctx)) { |
180 | fix_problem(ctx, PR_3_NO_ROOT_INODE_ABORT, &pctx); | |
181 | ctx->flags |= E2F_FLAG_ABORT; | |
182 | return; | |
183 | } | |
3839e657 | 184 | |
f8188fff | 185 | e2fsck_read_bitmaps(ctx); |
efc6f628 | 186 | |
3839e657 TT |
187 | /* |
188 | * First, find a free block | |
189 | */ | |
b729b7df DW |
190 | if (ctx->root_repair_block) { |
191 | blk = ctx->root_repair_block; | |
192 | ctx->root_repair_block = 0; | |
193 | goto skip_new_block; | |
194 | } | |
c5d2f50d | 195 | pctx.errcode = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk); |
1b6bf175 TT |
196 | if (pctx.errcode) { |
197 | pctx.str = "ext2fs_new_block"; | |
198 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
08b21301 TT |
199 | ctx->flags |= E2F_FLAG_ABORT; |
200 | return; | |
3839e657 | 201 | } |
c5d2f50d | 202 | ext2fs_mark_block_bitmap2(ctx->block_found_map, blk); |
b729b7df | 203 | skip_new_block: |
c5d2f50d | 204 | ext2fs_mark_block_bitmap2(fs->block_map, blk); |
3839e657 TT |
205 | ext2fs_mark_bb_dirty(fs); |
206 | ||
3839e657 TT |
207 | /* |
208 | * Set up the inode structure | |
209 | */ | |
210 | memset(&inode, 0, sizeof(inode)); | |
211 | inode.i_mode = 040755; | |
212 | inode.i_size = fs->blocksize; | |
1f3ad14a | 213 | inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now; |
3839e657 | 214 | inode.i_links_count = 2; |
1ca1059f | 215 | ext2fs_iblk_set(fs, &inode, 1); |
3839e657 TT |
216 | inode.i_block[0] = blk; |
217 | ||
218 | /* | |
219 | * Write out the inode. | |
220 | */ | |
030970ed | 221 | pctx.errcode = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode); |
1b6bf175 TT |
222 | if (pctx.errcode) { |
223 | pctx.str = "ext2fs_write_inode"; | |
224 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
08b21301 TT |
225 | ctx->flags |= E2F_FLAG_ABORT; |
226 | return; | |
3839e657 | 227 | } |
efc6f628 | 228 | |
eb89a628 DW |
229 | /* |
230 | * Now let's create the actual data block for the inode. | |
231 | * Due to metadata_csum, we must write the dir blocks AFTER | |
232 | * the inode has been written to disk! | |
233 | */ | |
234 | pctx.errcode = ext2fs_new_dir_block(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, | |
235 | &block); | |
236 | if (pctx.errcode) { | |
237 | pctx.str = "ext2fs_new_dir_block"; | |
238 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
239 | ctx->flags |= E2F_FLAG_ABORT; | |
240 | return; | |
241 | } | |
242 | ||
243 | pctx.errcode = ext2fs_write_dir_block4(fs, blk, block, 0, | |
244 | EXT2_ROOT_INO); | |
245 | ext2fs_free_mem(&block); | |
246 | if (pctx.errcode) { | |
247 | pctx.str = "ext2fs_write_dir_block4"; | |
248 | fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); | |
249 | ctx->flags |= E2F_FLAG_ABORT; | |
250 | return; | |
251 | } | |
252 | ||
3839e657 TT |
253 | /* |
254 | * Miscellaneous bookkeeping... | |
255 | */ | |
08b21301 | 256 | e2fsck_add_dir_info(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO); |
1b6bf175 TT |
257 | ext2fs_icount_store(ctx->inode_count, EXT2_ROOT_INO, 2); |
258 | ext2fs_icount_store(ctx->inode_link_info, EXT2_ROOT_INO, 2); | |
3839e657 | 259 | |
c5d2f50d VAH |
260 | ext2fs_mark_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO); |
261 | ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, EXT2_ROOT_INO); | |
262 | ext2fs_mark_inode_bitmap2(fs->inode_map, EXT2_ROOT_INO); | |
3839e657 TT |
263 | ext2fs_mark_ib_dirty(fs); |
264 | } | |
265 | ||
266 | /* | |
267 | * This subroutine is responsible for making sure that a particular | |
268 | * directory is connected to the root; if it isn't we trace it up as | |
269 | * far as we can go, and then offer to connect the resulting parent to | |
270 | * the lost+found. We have to do loop detection; if we ever discover | |
271 | * a loop, we treat that as a disconnected directory and offer to | |
272 | * reparent it to lost+found. | |
efc6f628 | 273 | * |
28ffafb0 TT |
274 | * However, loop detection is expensive, because for very large |
275 | * filesystems, the inode_loop_detect bitmap is huge, and clearing it | |
276 | * is non-trivial. Loops in filesystems are also a rare error case, | |
277 | * and we shouldn't optimize for error cases. So we try two passes of | |
278 | * the algorithm. The first time, we ignore loop detection and merely | |
279 | * increment a counter; if the counter exceeds some extreme threshold, | |
280 | * then we try again with the loop detection bitmap enabled. | |
3839e657 | 281 | */ |
28db82a8 | 282 | static int check_directory(e2fsck_t ctx, ext2_ino_t dir, |
28ffafb0 | 283 | struct problem_context *pctx) |
3839e657 | 284 | { |
28ffafb0 | 285 | ext2_filsys fs = ctx->fs; |
28db82a8 | 286 | ext2_ino_t ino = dir, parent; |
28ffafb0 | 287 | int loop_pass = 0, parent_count = 0; |
3839e657 | 288 | |
28ffafb0 | 289 | while (1) { |
3839e657 TT |
290 | /* |
291 | * Mark this inode as being "done"; by the time we | |
292 | * return from this function, the inode we either be | |
293 | * verified as being connected to the directory tree, | |
294 | * or we will have offered to reconnect this to | |
295 | * lost+found. | |
28ffafb0 TT |
296 | * |
297 | * If it was marked done already, then we've reached a | |
298 | * parent we've already checked. | |
3839e657 | 299 | */ |
c5d2f50d | 300 | if (ext2fs_mark_inode_bitmap2(inode_done_map, ino)) |
28ffafb0 | 301 | break; |
7f813ba3 | 302 | |
28db82a8 TT |
303 | if (e2fsck_dir_info_get_parent(ctx, ino, &parent)) { |
304 | fix_problem(ctx, PR_3_NO_DIRINFO, pctx); | |
305 | return 0; | |
306 | } | |
307 | ||
3839e657 TT |
308 | /* |
309 | * If this directory doesn't have a parent, or we've | |
310 | * seen the parent once already, then offer to | |
311 | * reparent it to lost+found | |
312 | */ | |
28db82a8 | 313 | if (!parent || |
efc6f628 | 314 | (loop_pass && |
c5d2f50d | 315 | (ext2fs_test_inode_bitmap2(inode_loop_detect, |
28db82a8 TT |
316 | parent)))) { |
317 | pctx->ino = ino; | |
7f813ba3 | 318 | if (fix_problem(ctx, PR_3_UNCONNECTED_DIR, pctx)) { |
2e5fcce0 | 319 | if (e2fsck_reconnect_file(ctx, pctx->ino)) |
7f813ba3 TT |
320 | ext2fs_unmark_valid(fs); |
321 | else { | |
efc6f628 | 322 | fix_dotdot(ctx, pctx->ino, |
28db82a8 TT |
323 | ctx->lost_and_found); |
324 | parent = ctx->lost_and_found; | |
7f813ba3 TT |
325 | } |
326 | } | |
3839e657 | 327 | break; |
7f813ba3 | 328 | } |
28db82a8 | 329 | ino = parent; |
28ffafb0 | 330 | if (loop_pass) { |
c5d2f50d | 331 | ext2fs_mark_inode_bitmap2(inode_loop_detect, ino); |
28ffafb0 TT |
332 | } else if (parent_count++ > 2048) { |
333 | /* | |
334 | * If we've run into a path depth that's | |
335 | * greater than 2048, try again with the inode | |
336 | * loop bitmap turned on and start from the | |
337 | * top. | |
338 | */ | |
339 | loop_pass = 1; | |
340 | if (inode_loop_detect) | |
341 | ext2fs_clear_inode_bitmap(inode_loop_detect); | |
342 | else { | |
830b44f4 | 343 | pctx->errcode = e2fsck_allocate_inode_bitmap(fs, _("inode loop detection bitmap"), EXT2FS_BMAP64_AUTODIR, "inode_loop_detect", &inode_loop_detect); |
28ffafb0 TT |
344 | if (pctx->errcode) { |
345 | pctx->num = 1; | |
efc6f628 | 346 | fix_problem(ctx, |
28ffafb0 TT |
347 | PR_3_ALLOCATE_IBITMAP_ERROR, pctx); |
348 | ctx->flags |= E2F_FLAG_ABORT; | |
349 | return -1; | |
350 | } | |
351 | } | |
28db82a8 | 352 | ino = dir; |
3839e657 | 353 | } |
21c84b71 | 354 | } |
3839e657 TT |
355 | |
356 | /* | |
357 | * Make sure that .. and the parent directory are the same; | |
358 | * offer to fix it if not. | |
359 | */ | |
28db82a8 TT |
360 | pctx->ino = dir; |
361 | if (e2fsck_dir_info_get_dotdot(ctx, dir, &pctx->ino2) || | |
362 | e2fsck_dir_info_get_parent(ctx, dir, &pctx->dir)) { | |
363 | fix_problem(ctx, PR_3_NO_DIRINFO, pctx); | |
364 | return 0; | |
365 | } | |
366 | if (pctx->ino2 != pctx->dir) { | |
1b6bf175 | 367 | if (fix_problem(ctx, PR_3_BAD_DOT_DOT, pctx)) |
28db82a8 | 368 | fix_dotdot(ctx, dir, pctx->dir); |
3839e657 | 369 | } |
28ffafb0 | 370 | return 0; |
b7a00563 | 371 | } |
3839e657 TT |
372 | |
373 | /* | |
374 | * This routine gets the lost_and_found inode, making it a directory | |
375 | * if necessary | |
376 | */ | |
850d05e9 | 377 | ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix) |
3839e657 | 378 | { |
1b6bf175 | 379 | ext2_filsys fs = ctx->fs; |
86c627ec | 380 | ext2_ino_t ino; |
c5d2f50d | 381 | blk64_t blk; |
3839e657 TT |
382 | errcode_t retval; |
383 | struct ext2_inode inode; | |
384 | char * block; | |
53ef44c4 | 385 | static const char name[] = "lost+found"; |
1b6bf175 | 386 | struct problem_context pctx; |
3839e657 | 387 | |
850d05e9 TT |
388 | if (ctx->lost_and_found) |
389 | return ctx->lost_and_found; | |
390 | ||
1b6bf175 | 391 | clear_problem_context(&pctx); |
efc6f628 | 392 | |
21c84b71 TT |
393 | retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, |
394 | sizeof(name)-1, 0, &ino); | |
850d05e9 TT |
395 | if (retval && !fix) |
396 | return 0; | |
4a9f5936 | 397 | if (!retval) { |
9676f3a9 ZL |
398 | /* Lost+found shouldn't have inline data */ |
399 | retval = ext2fs_read_inode(fs, ino, &inode); | |
400 | if (fix && retval) | |
401 | return 0; | |
402 | ||
403 | if (fix && (inode.i_flags & EXT4_INLINE_DATA_FL)) { | |
404 | if (!fix_problem(ctx, PR_3_LPF_INLINE_DATA, &pctx)) | |
405 | return 0; | |
406 | goto unlink; | |
407 | } | |
408 | ||
82372e32 | 409 | if (ext2fs_check_directory(fs, ino) == 0) { |
850d05e9 | 410 | ctx->lost_and_found = ino; |
4a9f5936 | 411 | return ino; |
850d05e9 | 412 | } |
efc6f628 | 413 | |
4a9f5936 | 414 | /* Lost+found isn't a directory! */ |
850d05e9 TT |
415 | if (!fix) |
416 | return 0; | |
4a9f5936 TT |
417 | pctx.ino = ino; |
418 | if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx)) | |
419 | return 0; | |
420 | ||
9676f3a9 | 421 | unlink: |
c54b3c3c | 422 | /* OK, unlink the old /lost+found file. */ |
4a9f5936 TT |
423 | pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0); |
424 | if (pctx.errcode) { | |
425 | pctx.str = "ext2fs_unlink"; | |
426 | fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); | |
427 | return 0; | |
428 | } | |
28db82a8 | 429 | (void) e2fsck_dir_info_set_parent(ctx, ino, 0); |
b0700a1b | 430 | e2fsck_adjust_inode_count(ctx, ino, -1); |
4a9f5936 | 431 | } else if (retval != EXT2_ET_FILE_NOT_FOUND) { |
1b6bf175 TT |
432 | pctx.errcode = retval; |
433 | fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx); | |
434 | } | |
435 | if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0)) | |
3839e657 | 436 | return 0; |
3839e657 TT |
437 | |
438 | /* | |
439 | * Read the inode and block bitmaps in; we'll be messing with | |
440 | * them. | |
441 | */ | |
f8188fff | 442 | e2fsck_read_bitmaps(ctx); |
efc6f628 | 443 | |
3839e657 TT |
444 | /* |
445 | * First, find a free block | |
446 | */ | |
b729b7df DW |
447 | if (ctx->lnf_repair_block) { |
448 | blk = ctx->lnf_repair_block; | |
449 | ctx->lnf_repair_block = 0; | |
450 | goto skip_new_block; | |
451 | } | |
c5d2f50d | 452 | retval = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk); |
09918967 DW |
453 | if (retval == EXT2_ET_BLOCK_ALLOC_FAIL && |
454 | fix_problem(ctx, PR_3_LPF_NO_SPACE, &pctx)) { | |
d5da89e8 | 455 | fix_problem(ctx, PR_3_NO_SPACE_TO_RECOVER, &pctx); |
09918967 DW |
456 | ctx->lost_and_found = EXT2_ROOT_INO; |
457 | return 0; | |
458 | } | |
3839e657 | 459 | if (retval) { |
1b6bf175 TT |
460 | pctx.errcode = retval; |
461 | fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx); | |
3839e657 TT |
462 | return 0; |
463 | } | |
c5d2f50d | 464 | ext2fs_mark_block_bitmap2(ctx->block_found_map, blk); |
b729b7df | 465 | skip_new_block: |
48f23054 | 466 | ext2fs_block_alloc_stats2(fs, blk, +1); |
3839e657 TT |
467 | |
468 | /* | |
469 | * Next find a free inode. | |
470 | */ | |
b0700a1b | 471 | retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700, |
1b6bf175 | 472 | ctx->inode_used_map, &ino); |
09918967 DW |
473 | if (retval == EXT2_ET_INODE_ALLOC_FAIL && |
474 | fix_problem(ctx, PR_3_LPF_NO_SPACE, &pctx)) { | |
d5da89e8 | 475 | fix_problem(ctx, PR_3_NO_SPACE_TO_RECOVER, &pctx); |
09918967 DW |
476 | ctx->lost_and_found = EXT2_ROOT_INO; |
477 | return 0; | |
478 | } | |
3839e657 | 479 | if (retval) { |
1b6bf175 TT |
480 | pctx.errcode = retval; |
481 | fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx); | |
3839e657 TT |
482 | return 0; |
483 | } | |
c5d2f50d VAH |
484 | ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino); |
485 | ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino); | |
0684a4f3 | 486 | ext2fs_inode_alloc_stats2(fs, ino, +1, 1); |
3839e657 | 487 | |
3839e657 TT |
488 | /* |
489 | * Set up the inode structure | |
490 | */ | |
491 | memset(&inode, 0, sizeof(inode)); | |
64aecc4d | 492 | inode.i_mode = 040700; |
3839e657 | 493 | inode.i_size = fs->blocksize; |
1f3ad14a | 494 | inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now; |
3839e657 | 495 | inode.i_links_count = 2; |
1ca1059f | 496 | ext2fs_iblk_set(fs, &inode, 1); |
3839e657 TT |
497 | inode.i_block[0] = blk; |
498 | ||
499 | /* | |
500 | * Next, write out the inode. | |
501 | */ | |
030970ed | 502 | pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode); |
1b6bf175 TT |
503 | if (pctx.errcode) { |
504 | pctx.str = "ext2fs_write_inode"; | |
505 | fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); | |
3839e657 TT |
506 | return 0; |
507 | } | |
eb89a628 DW |
508 | |
509 | /* | |
510 | * Now let's create the actual data block for the inode. | |
511 | * Due to metadata_csum, the directory block MUST be written | |
512 | * after the inode is written to disk! | |
513 | */ | |
514 | retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block); | |
515 | if (retval) { | |
516 | pctx.errcode = retval; | |
517 | fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx); | |
518 | return 0; | |
519 | } | |
520 | ||
521 | retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino); | |
522 | ext2fs_free_mem(&block); | |
523 | if (retval) { | |
524 | pctx.errcode = retval; | |
525 | fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx); | |
526 | return 0; | |
527 | } | |
528 | ||
3839e657 TT |
529 | /* |
530 | * Finally, create the directory link | |
531 | */ | |
6fdc7a32 | 532 | pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR); |
f0770b16 DW |
533 | if (pctx.errcode == EXT2_ET_DIR_NO_SPACE) { |
534 | pctx.errcode = ext2fs_expand_dir(fs, EXT2_ROOT_INO); | |
535 | if (pctx.errcode) | |
536 | goto link_error; | |
537 | pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, | |
538 | EXT2_FT_DIR); | |
539 | } | |
1b6bf175 | 540 | if (pctx.errcode) { |
f0770b16 | 541 | link_error: |
1b6bf175 TT |
542 | pctx.str = "ext2fs_link"; |
543 | fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); | |
3839e657 TT |
544 | return 0; |
545 | } | |
546 | ||
547 | /* | |
548 | * Miscellaneous bookkeeping that needs to be kept straight. | |
549 | */ | |
08b21301 | 550 | e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO); |
b0700a1b | 551 | e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1); |
1b6bf175 TT |
552 | ext2fs_icount_store(ctx->inode_count, ino, 2); |
553 | ext2fs_icount_store(ctx->inode_link_info, ino, 2); | |
850d05e9 | 554 | ctx->lost_and_found = ino; |
624e4a64 AK |
555 | quota_data_add(ctx->qctx, &inode, ino, fs->blocksize); |
556 | quota_data_inodes(ctx->qctx, &inode, ino, +1); | |
3839e657 | 557 | #if 0 |
f3db3566 | 558 | printf("/lost+found created; inode #%lu\n", ino); |
3839e657 TT |
559 | #endif |
560 | return ino; | |
561 | } | |
562 | ||
563 | /* | |
564 | * This routine will connect a file to lost+found | |
565 | */ | |
86c627ec | 566 | int e2fsck_reconnect_file(e2fsck_t ctx, ext2_ino_t ino) |
3839e657 | 567 | { |
1b6bf175 | 568 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
569 | errcode_t retval; |
570 | char name[80]; | |
1b6bf175 | 571 | struct problem_context pctx; |
6fdc7a32 TT |
572 | struct ext2_inode inode; |
573 | int file_type = 0; | |
1b6bf175 TT |
574 | |
575 | clear_problem_context(&pctx); | |
6fdc7a32 | 576 | pctx.ino = ino; |
1b6bf175 | 577 | |
850d05e9 TT |
578 | if (!ctx->bad_lost_and_found && !ctx->lost_and_found) { |
579 | if (e2fsck_get_lost_and_found(ctx, 1) == 0) | |
580 | ctx->bad_lost_and_found++; | |
1b6bf175 | 581 | } |
850d05e9 | 582 | if (ctx->bad_lost_and_found) { |
1b6bf175 | 583 | fix_problem(ctx, PR_3_NO_LPF, &pctx); |
3839e657 TT |
584 | return 1; |
585 | } | |
efc6f628 | 586 | |
86c627ec | 587 | sprintf(name, "#%u", ino); |
6fdc7a32 TT |
588 | if (ext2fs_read_inode(fs, ino, &inode) == 0) |
589 | file_type = ext2_file_type(inode.i_mode); | |
850d05e9 | 590 | retval = ext2fs_link(fs, ctx->lost_and_found, name, ino, file_type); |
3839e657 | 591 | if (retval == EXT2_ET_DIR_NO_SPACE) { |
1b6bf175 | 592 | if (!fix_problem(ctx, PR_3_EXPAND_LF_DIR, &pctx)) |
3839e657 | 593 | return 1; |
efc6f628 | 594 | retval = e2fsck_expand_directory(ctx, ctx->lost_and_found, |
850d05e9 | 595 | 1, 0); |
3839e657 | 596 | if (retval) { |
1b6bf175 TT |
597 | pctx.errcode = retval; |
598 | fix_problem(ctx, PR_3_CANT_EXPAND_LPF, &pctx); | |
3839e657 TT |
599 | return 1; |
600 | } | |
850d05e9 TT |
601 | retval = ext2fs_link(fs, ctx->lost_and_found, name, |
602 | ino, file_type); | |
3839e657 TT |
603 | } |
604 | if (retval) { | |
1b6bf175 TT |
605 | pctx.errcode = retval; |
606 | fix_problem(ctx, PR_3_CANT_RECONNECT, &pctx); | |
3839e657 TT |
607 | return 1; |
608 | } | |
b0700a1b | 609 | e2fsck_adjust_inode_count(ctx, ino, 1); |
3839e657 TT |
610 | |
611 | return 0; | |
612 | } | |
613 | ||
614 | /* | |
615 | * Utility routine to adjust the inode counts on an inode. | |
616 | */ | |
b0700a1b | 617 | errcode_t e2fsck_adjust_inode_count(e2fsck_t ctx, ext2_ino_t ino, int adj) |
3839e657 | 618 | { |
1b6bf175 | 619 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
620 | errcode_t retval; |
621 | struct ext2_inode inode; | |
efc6f628 | 622 | |
3839e657 TT |
623 | if (!ino) |
624 | return 0; | |
625 | ||
626 | retval = ext2fs_read_inode(fs, ino, &inode); | |
627 | if (retval) | |
628 | return retval; | |
629 | ||
630 | #if 0 | |
f3db3566 | 631 | printf("Adjusting link count for inode %lu by %d (from %d)\n", ino, adj, |
3839e657 TT |
632 | inode.i_links_count); |
633 | #endif | |
634 | ||
21c84b71 | 635 | if (adj == 1) { |
1b6bf175 | 636 | ext2fs_icount_increment(ctx->inode_count, ino, 0); |
c1faf9cc TT |
637 | if (inode.i_links_count == (__u16) ~0) |
638 | return 0; | |
1b6bf175 | 639 | ext2fs_icount_increment(ctx->inode_link_info, ino, 0); |
c1faf9cc TT |
640 | inode.i_links_count++; |
641 | } else if (adj == -1) { | |
1b6bf175 | 642 | ext2fs_icount_decrement(ctx->inode_count, ino, 0); |
c1faf9cc TT |
643 | if (inode.i_links_count == 0) |
644 | return 0; | |
1b6bf175 | 645 | ext2fs_icount_decrement(ctx->inode_link_info, ino, 0); |
c1faf9cc | 646 | inode.i_links_count--; |
21c84b71 | 647 | } |
efc6f628 | 648 | |
3839e657 TT |
649 | retval = ext2fs_write_inode(fs, ino, &inode); |
650 | if (retval) | |
651 | return retval; | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
656 | /* | |
657 | * Fix parent --- this routine fixes up the parent of a directory. | |
658 | */ | |
659 | struct fix_dotdot_struct { | |
660 | ext2_filsys fs; | |
86c627ec | 661 | ext2_ino_t parent; |
3839e657 | 662 | int done; |
1b6bf175 | 663 | e2fsck_t ctx; |
3839e657 TT |
664 | }; |
665 | ||
666 | static int fix_dotdot_proc(struct ext2_dir_entry *dirent, | |
54434927 TT |
667 | int offset EXT2FS_ATTR((unused)), |
668 | int blocksize EXT2FS_ATTR((unused)), | |
669 | char *buf EXT2FS_ATTR((unused)), | |
54dc7ca2 | 670 | void *priv_data) |
3839e657 | 671 | { |
54dc7ca2 | 672 | struct fix_dotdot_struct *fp = (struct fix_dotdot_struct *) priv_data; |
3839e657 | 673 | errcode_t retval; |
1b6bf175 | 674 | struct problem_context pctx; |
3839e657 | 675 | |
70f4632b | 676 | if (ext2fs_dirent_name_len(dirent) != 2) |
3839e657 TT |
677 | return 0; |
678 | if (strncmp(dirent->name, "..", 2)) | |
679 | return 0; | |
3839e657 | 680 | |
1b6bf175 | 681 | clear_problem_context(&pctx); |
efc6f628 | 682 | |
b0700a1b | 683 | retval = e2fsck_adjust_inode_count(fp->ctx, dirent->inode, -1); |
1b6bf175 TT |
684 | if (retval) { |
685 | pctx.errcode = retval; | |
686 | fix_problem(fp->ctx, PR_3_ADJUST_INODE, &pctx); | |
687 | } | |
b0700a1b | 688 | retval = e2fsck_adjust_inode_count(fp->ctx, fp->parent, 1); |
1b6bf175 TT |
689 | if (retval) { |
690 | pctx.errcode = retval; | |
691 | fix_problem(fp->ctx, PR_3_ADJUST_INODE, &pctx); | |
692 | } | |
3839e657 | 693 | dirent->inode = fp->parent; |
56c8c592 TT |
694 | if (fp->ctx->fs->super->s_feature_incompat & |
695 | EXT2_FEATURE_INCOMPAT_FILETYPE) | |
70f4632b | 696 | ext2fs_dirent_set_file_type(dirent, EXT2_FT_DIR); |
56c8c592 | 697 | else |
70f4632b | 698 | ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN); |
3839e657 TT |
699 | |
700 | fp->done++; | |
701 | return DIRENT_ABORT | DIRENT_CHANGED; | |
702 | } | |
703 | ||
28db82a8 | 704 | static void fix_dotdot(e2fsck_t ctx, ext2_ino_t ino, ext2_ino_t parent) |
3839e657 | 705 | { |
1b6bf175 | 706 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
707 | errcode_t retval; |
708 | struct fix_dotdot_struct fp; | |
1b6bf175 | 709 | struct problem_context pctx; |
2e9d8391 | 710 | int flags, will_rehash; |
3839e657 TT |
711 | |
712 | fp.fs = fs; | |
713 | fp.parent = parent; | |
714 | fp.done = 0; | |
1b6bf175 | 715 | fp.ctx = ctx; |
3839e657 TT |
716 | |
717 | #if 0 | |
28db82a8 | 718 | printf("Fixing '..' of inode %lu to be %lu...\n", ino, parent); |
3839e657 | 719 | #endif |
efc6f628 | 720 | |
28db82a8 TT |
721 | clear_problem_context(&pctx); |
722 | pctx.ino = ino; | |
2e9d8391 DW |
723 | will_rehash = e2fsck_dir_will_be_rehashed(ctx, ino); |
724 | if (will_rehash) { | |
725 | flags = ctx->fs->flags; | |
e8548796 | 726 | ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS; |
2e9d8391 | 727 | } |
28db82a8 | 728 | retval = ext2fs_dir_iterate(fs, ino, DIRENT_FLAG_INCLUDE_EMPTY, |
3839e657 | 729 | 0, fix_dotdot_proc, &fp); |
2e9d8391 DW |
730 | if (will_rehash) |
731 | ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) | | |
732 | (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS); | |
3839e657 | 733 | if (retval || !fp.done) { |
1b6bf175 TT |
734 | pctx.errcode = retval; |
735 | fix_problem(ctx, retval ? PR_3_FIX_PARENT_ERR : | |
736 | PR_3_FIX_PARENT_NOFIND, &pctx); | |
3839e657 TT |
737 | ext2fs_unmark_valid(fs); |
738 | } | |
28db82a8 TT |
739 | (void) e2fsck_dir_info_set_dotdot(ctx, ino, parent); |
740 | if (e2fsck_dir_info_set_parent(ctx, ino, ctx->lost_and_found)) | |
741 | fix_problem(ctx, PR_3_NO_DIRINFO, &pctx); | |
742 | ||
3839e657 TT |
743 | return; |
744 | } | |
745 | ||
746 | /* | |
747 | * These routines are responsible for expanding a /lost+found if it is | |
748 | * too small. | |
749 | */ | |
750 | ||
751 | struct expand_dir_struct { | |
6dc64392 VAH |
752 | blk64_t num; |
753 | e2_blkcnt_t guaranteed_size; | |
754 | blk64_t newblocks; | |
755 | blk64_t last_block; | |
c1faf9cc TT |
756 | errcode_t err; |
757 | e2fsck_t ctx; | |
81683c6a | 758 | ext2_ino_t dir; |
3839e657 TT |
759 | }; |
760 | ||
761 | static int expand_dir_proc(ext2_filsys fs, | |
6dc64392 | 762 | blk64_t *blocknr, |
133a56dc | 763 | e2_blkcnt_t blockcnt, |
6dc64392 | 764 | blk64_t ref_block EXT2FS_ATTR((unused)), |
54434927 | 765 | int ref_offset EXT2FS_ATTR((unused)), |
54dc7ca2 | 766 | void *priv_data) |
3839e657 | 767 | { |
54dc7ca2 | 768 | struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data; |
c5d2f50d | 769 | blk64_t new_blk; |
6dc64392 | 770 | static blk64_t last_blk = 0; |
3839e657 TT |
771 | char *block; |
772 | errcode_t retval; | |
1b6bf175 TT |
773 | e2fsck_t ctx; |
774 | ||
775 | ctx = es->ctx; | |
efc6f628 | 776 | |
b7a00563 TT |
777 | if (es->guaranteed_size && blockcnt >= es->guaranteed_size) |
778 | return BLOCK_ABORT; | |
779 | ||
780 | if (blockcnt > 0) | |
781 | es->last_block = blockcnt; | |
3839e657 TT |
782 | if (*blocknr) { |
783 | last_blk = *blocknr; | |
784 | return 0; | |
785 | } | |
0047255f DW |
786 | |
787 | if (blockcnt && | |
788 | (EXT2FS_B2C(fs, last_blk) == EXT2FS_B2C(fs, last_blk + 1))) | |
789 | new_blk = last_blk + 1; | |
790 | else { | |
791 | last_blk &= ~EXT2FS_CLUSTER_MASK(fs); | |
792 | retval = ext2fs_new_block2(fs, last_blk, ctx->block_found_map, | |
793 | &new_blk); | |
794 | if (retval) { | |
795 | es->err = retval; | |
796 | return BLOCK_ABORT; | |
797 | } | |
798 | es->newblocks++; | |
799 | ext2fs_block_alloc_stats2(fs, new_blk, +1); | |
3839e657 | 800 | } |
0047255f DW |
801 | last_blk = new_blk; |
802 | ||
3839e657 TT |
803 | if (blockcnt > 0) { |
804 | retval = ext2fs_new_dir_block(fs, 0, 0, &block); | |
805 | if (retval) { | |
806 | es->err = retval; | |
807 | return BLOCK_ABORT; | |
808 | } | |
b7a00563 | 809 | es->num--; |
81683c6a DW |
810 | retval = ext2fs_write_dir_block4(fs, new_blk, block, 0, |
811 | es->dir); | |
3839e657 | 812 | } else { |
c4e3d3f3 | 813 | retval = ext2fs_get_mem(fs->blocksize, &block); |
08b21301 TT |
814 | if (retval) { |
815 | es->err = retval; | |
3839e657 TT |
816 | return BLOCK_ABORT; |
817 | } | |
818 | memset(block, 0, fs->blocksize); | |
24a117ab | 819 | retval = io_channel_write_blk64(fs->io, new_blk, 1, block); |
efc6f628 | 820 | } |
3839e657 TT |
821 | if (retval) { |
822 | es->err = retval; | |
823 | return BLOCK_ABORT; | |
824 | } | |
c4e3d3f3 | 825 | ext2fs_free_mem(&block); |
3839e657 | 826 | *blocknr = new_blk; |
c5d2f50d | 827 | ext2fs_mark_block_bitmap2(ctx->block_found_map, new_blk); |
efc6f628 | 828 | |
b7a00563 | 829 | if (es->num == 0) |
3839e657 TT |
830 | return (BLOCK_CHANGED | BLOCK_ABORT); |
831 | else | |
832 | return BLOCK_CHANGED; | |
833 | } | |
834 | ||
b7a00563 TT |
835 | errcode_t e2fsck_expand_directory(e2fsck_t ctx, ext2_ino_t dir, |
836 | int num, int guaranteed_size) | |
3839e657 | 837 | { |
1b6bf175 | 838 | ext2_filsys fs = ctx->fs; |
3839e657 TT |
839 | errcode_t retval; |
840 | struct expand_dir_struct es; | |
841 | struct ext2_inode inode; | |
c4c9bc59 | 842 | blk64_t sz; |
efc6f628 | 843 | |
3839e657 TT |
844 | if (!(fs->flags & EXT2_FLAG_RW)) |
845 | return EXT2_ET_RO_FILSYS; | |
846 | ||
b8647faa TT |
847 | /* |
848 | * Read the inode and block bitmaps in; we'll be messing with | |
849 | * them. | |
850 | */ | |
851 | e2fsck_read_bitmaps(ctx); | |
c1faf9cc | 852 | |
3839e657 TT |
853 | retval = ext2fs_check_directory(fs, dir); |
854 | if (retval) | |
855 | return retval; | |
efc6f628 | 856 | |
b7a00563 TT |
857 | es.num = num; |
858 | es.guaranteed_size = guaranteed_size; | |
859 | es.last_block = 0; | |
3839e657 | 860 | es.err = 0; |
c1faf9cc | 861 | es.newblocks = 0; |
1b6bf175 | 862 | es.ctx = ctx; |
81683c6a | 863 | es.dir = dir; |
efc6f628 | 864 | |
6dc64392 | 865 | retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_APPEND, |
133a56dc | 866 | 0, expand_dir_proc, &es); |
3839e657 TT |
867 | |
868 | if (es.err) | |
869 | return es.err; | |
3839e657 TT |
870 | |
871 | /* | |
872 | * Update the size and block count fields in the inode. | |
873 | */ | |
874 | retval = ext2fs_read_inode(fs, dir, &inode); | |
875 | if (retval) | |
876 | return retval; | |
efc6f628 | 877 | |
4dbfd79d | 878 | sz = (es.last_block + 1) * fs->blocksize; |
97c607b1 DW |
879 | retval = ext2fs_inode_size_set(fs, &inode, sz); |
880 | if (retval) | |
881 | return retval; | |
1ca1059f | 882 | ext2fs_iblk_add_blocks(fs, &inode, es.newblocks); |
624e4a64 | 883 | quota_data_add(ctx->qctx, &inode, dir, es.newblocks * fs->blocksize); |
3839e657 | 884 | |
08b21301 | 885 | e2fsck_write_inode(ctx, dir, &inode, "expand_directory"); |
3839e657 TT |
886 | |
887 | return 0; | |
888 | } | |
b7a00563 | 889 |