Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 1 | /* |
| 2 | * pass2.c --- check directory structure |
| 3 | * |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 4 | * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o |
| 5 | * |
| 6 | * %Begin-Header% |
| 7 | * This file may be redistributed under the terms of the GNU Public |
| 8 | * License. |
| 9 | * %End-Header% |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 10 | * |
| 11 | * Pass 2 of e2fsck iterates through all active directory inodes, and |
| 12 | * applies to following tests to each directory entry in the directory |
| 13 | * blocks in the inodes: |
| 14 | * |
| 15 | * - The length of the directory entry (rec_len) should be at |
| 16 | * least 8 bytes, and no more than the remaining space |
| 17 | * left in the directory block. |
| 18 | * - The length of the name in the directory entry (name_len) |
| 19 | * should be less than (rec_len - 8). |
| 20 | * - The inode number in the directory entry should be within |
| 21 | * legal bounds. |
| 22 | * - The inode number should refer to a in-use inode. |
| 23 | * - The first entry should be '.', and its inode should be |
| 24 | * the inode of the directory. |
| 25 | * - The second entry should be '..'. |
| 26 | * |
| 27 | * To minimize disk seek time, the directory blocks are processed in |
| 28 | * sorted order of block numbers. |
| 29 | * |
| 30 | * Pass 2 also collects the following information: |
| 31 | * - The inode numbers of the subdirectories for each directory. |
| 32 | * |
| 33 | * Pass 2 relies on the following information from previous passes: |
| 34 | * - The directory information collected in pass 1. |
| 35 | * - The inode_used_map bitmap |
| 36 | * - The inode_bad_map bitmap |
| 37 | * - The inode_dir_map bitmap |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 38 | * |
| 39 | * Pass 2 frees the following data structures |
| 40 | * - The inode_bad_map bitmap |
| 41 | */ |
| 42 | |
| 43 | #include "et/com_err.h" |
| 44 | |
| 45 | #include "e2fsck.h" |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 46 | #include "problem.h" |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 47 | |
| 48 | /* |
| 49 | * Keeps track of how many times an inode is referenced. |
| 50 | */ |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 51 | ext2_icount_t inode_count = 0; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 52 | |
| 53 | static void deallocate_inode(ext2_filsys fs, ino_t ino, |
| 54 | char* block_buf); |
| 55 | static int process_bad_inode(ext2_filsys fs, ino_t dir, ino_t ino); |
| 56 | static int check_dir_block(ext2_filsys fs, |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 57 | struct ext2_db_entry *dir_blocks_info, |
| 58 | void *private); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 59 | static int allocate_dir_block(ext2_filsys fs, |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 60 | struct ext2_db_entry *dir_blocks_info, |
| 61 | char *buf, struct problem_context *pctx); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 62 | static int update_dir_block(ext2_filsys fs, |
| 63 | blk_t *block_nr, |
| 64 | int blockcnt, |
| 65 | void *private); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 66 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 67 | struct check_dir_struct { |
| 68 | char *buf; |
| 69 | struct problem_context pctx; |
| 70 | }; |
| 71 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 72 | void pass2(ext2_filsys fs) |
| 73 | { |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 74 | char *buf; |
| 75 | struct resource_track rtrack; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 76 | struct dir_info *dir; |
| 77 | errcode_t retval; |
| 78 | ino_t size; |
| 79 | struct check_dir_struct cd; |
| 80 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 81 | init_resource_track(&rtrack); |
| 82 | |
| 83 | #ifdef MTRACE |
| 84 | mtrace_print("Pass 2"); |
| 85 | #endif |
| 86 | |
| 87 | if (!preen) |
| 88 | printf("Pass 2: Checking directory structure\n"); |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 89 | retval = ext2fs_create_icount2(fs, EXT2_ICOUNT_OPT_INCREMENT, |
| 90 | 0, inode_link_info, &inode_count); |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 91 | if (retval) { |
| 92 | com_err("ext2fs_create_icount", retval, |
| 93 | "while creating inode_count"); |
| 94 | fatal_error(0); |
| 95 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 96 | buf = allocate_memory(fs->blocksize, "directory scan buffer"); |
| 97 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 98 | /* |
| 99 | * Set up the parent pointer for the root directory, if |
| 100 | * present. (If the root directory is not present, we will |
| 101 | * create it in pass 3.) |
| 102 | */ |
| 103 | dir = get_dir_info(EXT2_ROOT_INO); |
| 104 | if (dir) |
| 105 | dir->parent = EXT2_ROOT_INO; |
| 106 | |
| 107 | cd.buf = buf; |
| 108 | clear_problem_context(&cd.pctx); |
| 109 | |
| 110 | retval = ext2fs_dblist_iterate(fs->dblist, check_dir_block, &cd); |
| 111 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 112 | free(buf); |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 113 | ext2fs_free_dblist(fs->dblist); |
| 114 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 115 | if (inode_bad_map) { |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 116 | ext2fs_free_inode_bitmap(inode_bad_map); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 117 | inode_bad_map = 0; |
| 118 | } |
| 119 | if (tflag > 1) { |
| 120 | printf("Pass 2: "); |
| 121 | print_resource_track(&rtrack); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * Make sure the first entry in the directory is '.', and that the |
| 127 | * directory entry is sane. |
| 128 | */ |
| 129 | static int check_dot(ext2_filsys fs, |
| 130 | struct ext2_dir_entry *dirent, |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 131 | ino_t ino, struct problem_context *pctx) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 132 | { |
| 133 | struct ext2_dir_entry *nextdir; |
| 134 | int status = 0; |
| 135 | int created = 0; |
| 136 | int new_len; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 137 | int problem = 0; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 138 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 139 | if (!dirent->inode) |
| 140 | problem = PR_2_MISSING_DOT; |
| 141 | else if ((dirent->name_len != 1) || |
| 142 | (dirent->name[0] != '.')) |
| 143 | problem = PR_2_1ST_NOT_DOT; |
| 144 | else if (dirent->name[1] != '\0') |
| 145 | problem = PR_2_DOT_NULL_TERM; |
| 146 | |
| 147 | if (problem) { |
| 148 | if (fix_problem(fs, problem, pctx)) { |
| 149 | if (dirent->rec_len < 12) |
| 150 | dirent->rec_len = 12; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 151 | dirent->inode = ino; |
| 152 | dirent->name_len = 1; |
| 153 | dirent->name[0] = '.'; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 154 | dirent->name[1] = '\0'; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 155 | status = 1; |
| 156 | created = 1; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 157 | } |
| 158 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 159 | if (dirent->inode != ino) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 160 | if (fix_problem(fs, PR_2_BAD_INODE_DOT, pctx)) { |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 161 | dirent->inode = ino; |
| 162 | status = 1; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 163 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 164 | } |
| 165 | if (dirent->rec_len > 12) { |
| 166 | new_len = dirent->rec_len - 12; |
| 167 | if (new_len > 12) { |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 168 | preenhalt(fs); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 169 | if (created || |
| 170 | ask("Directory entry for '.' is big. Split", 1)) { |
| 171 | nextdir = (struct ext2_dir_entry *) |
| 172 | ((char *) dirent + 12); |
| 173 | dirent->rec_len = 12; |
| 174 | nextdir->rec_len = new_len; |
| 175 | nextdir->inode = 0; |
| 176 | nextdir->name_len = 0; |
| 177 | status = 1; |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | return status; |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * Make sure the second entry in the directory is '..', and that the |
| 186 | * directory entry is sane. We do not check the inode number of '..' |
| 187 | * here; this gets done in pass 3. |
| 188 | */ |
| 189 | static int check_dotdot(ext2_filsys fs, |
| 190 | struct ext2_dir_entry *dirent, |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 191 | struct dir_info *dir, struct problem_context *pctx) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 192 | { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 193 | int problem = 0; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 194 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 195 | if (!dirent->inode) |
| 196 | problem = PR_2_MISSING_DOT_DOT; |
| 197 | else if ((dirent->name_len != 2) || |
| 198 | (dirent->name[0] != '.') || |
| 199 | (dirent->name[1] != '.')) |
| 200 | problem = PR_2_2ND_NOT_DOT_DOT; |
| 201 | else if (dirent->name[2] != '\0') |
| 202 | problem = PR_2_DOT_DOT_NULL_TERM; |
| 203 | |
| 204 | if (problem) { |
| 205 | if (fix_problem(fs, problem, pctx)) { |
| 206 | if (dirent->rec_len < 12) |
| 207 | dirent->rec_len = 12; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 208 | /* |
| 209 | * Note: we don't have the parent inode just |
| 210 | * yet, so we will fill it in with the root |
| 211 | * inode. This will get fixed in pass 3. |
| 212 | */ |
| 213 | dirent->inode = EXT2_ROOT_INO; |
| 214 | dirent->name_len = 2; |
| 215 | dirent->name[0] = '.'; |
| 216 | dirent->name[1] = '.'; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 217 | dirent->name[2] = '\0'; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 218 | return 1; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 219 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 220 | return 0; |
| 221 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 222 | dir->dotdot = dirent->inode; |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * Check to make sure a directory entry doesn't contain any illegal |
| 228 | * characters. |
| 229 | */ |
| 230 | static int check_name(ext2_filsys fs, |
| 231 | struct ext2_dir_entry *dirent, |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 232 | ino_t dir_ino, struct problem_context *pctx) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 233 | { |
| 234 | int i; |
| 235 | int fixup = -1; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 236 | int ret = 0; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 237 | |
| 238 | for ( i = 0; i < dirent->name_len; i++) { |
| 239 | if (dirent->name[i] == '/' || dirent->name[i] == '\0') { |
| 240 | if (fixup < 0) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 241 | fixup = fix_problem(fs, PR_2_BAD_NAME, pctx); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 242 | } |
| 243 | if (fixup) { |
| 244 | dirent->name[i] = '.'; |
| 245 | ret = 1; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 246 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 247 | } |
| 248 | } |
| 249 | return ret; |
| 250 | } |
| 251 | |
| 252 | static int check_dir_block(ext2_filsys fs, |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 253 | struct ext2_db_entry *db, |
| 254 | void *private) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 255 | { |
| 256 | struct dir_info *subdir, *dir; |
| 257 | struct ext2_dir_entry *dirent; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 258 | int offset = 0; |
| 259 | int dir_modified = 0; |
| 260 | errcode_t retval; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 261 | int dot_state; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 262 | blk_t block_nr = db->blk; |
| 263 | ino_t ino = db->ino; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 264 | __u16 links; |
| 265 | struct check_dir_struct *cd = private; |
| 266 | char *buf = cd->buf; |
| 267 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 268 | /* |
| 269 | * Make sure the inode is still in use (could have been |
| 270 | * deleted in the duplicate/bad blocks pass. |
| 271 | */ |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 272 | if (!(ext2fs_test_inode_bitmap(inode_used_map, ino))) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 273 | return 0; |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 274 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 275 | cd->pctx.ino = ino; |
| 276 | cd->pctx.blk = block_nr; |
| 277 | cd->pctx.blkcount = db->blockcnt; |
| 278 | cd->pctx.ino2 = 0; |
| 279 | cd->pctx.dirent = 0; |
| 280 | cd->pctx.num = 0; |
| 281 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 282 | if (db->blk == 0) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 283 | if (allocate_dir_block(fs, db, buf, &cd->pctx)) |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 284 | return 0; |
| 285 | block_nr = db->blk; |
| 286 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 287 | |
| 288 | if (db->blockcnt) |
| 289 | dot_state = 2; |
| 290 | else |
| 291 | dot_state = 0; |
| 292 | |
| 293 | #if 0 |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 294 | printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr, |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 295 | db->blockcnt, ino); |
| 296 | #endif |
| 297 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 298 | retval = ext2fs_read_dir_block(fs, block_nr, buf); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 299 | if (retval) { |
| 300 | com_err(program_name, retval, |
| 301 | "while reading directory block %d", block_nr); |
| 302 | } |
| 303 | |
| 304 | do { |
| 305 | dot_state++; |
| 306 | dirent = (struct ext2_dir_entry *) (buf + offset); |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 307 | cd->pctx.dirent = dirent; |
| 308 | cd->pctx.num = offset; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 309 | if (((offset + dirent->rec_len) > fs->blocksize) || |
| 310 | (dirent->rec_len < 8) || |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 311 | ((dirent->rec_len % 4) != 0) || |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 312 | ((dirent->name_len+8) > dirent->rec_len)) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 313 | if (fix_problem(fs, PR_2_DIR_CORRUPTED, &cd->pctx)) { |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 314 | dirent->rec_len = fs->blocksize - offset; |
| 315 | dirent->name_len = 0; |
| 316 | dirent->inode = 0; |
| 317 | dir_modified++; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 318 | } else |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 319 | return DIRENT_ABORT; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 320 | } |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 321 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 322 | if (dirent->name_len > EXT2_NAME_LEN) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 323 | if (fix_problem(fs, PR_2_FILENAME_LONG, &cd->pctx)) { |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 324 | dirent->name_len = EXT2_NAME_LEN; |
| 325 | dir_modified++; |
| 326 | } |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 327 | } |
| 328 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 329 | if (dot_state == 1) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 330 | if (check_dot(fs, dirent, ino, &cd->pctx)) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 331 | dir_modified++; |
| 332 | } else if (dot_state == 2) { |
| 333 | dir = get_dir_info(ino); |
| 334 | if (!dir) { |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 335 | printf("Internal error: couldn't find dir_info for %lu\n", |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 336 | ino); |
| 337 | fatal_error(0); |
| 338 | } |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 339 | if (check_dotdot(fs, dirent, dir, &cd->pctx)) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 340 | dir_modified++; |
| 341 | } else if (dirent->inode == ino) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 342 | if (fix_problem(fs, PR_2_LINK_DOT, &cd->pctx)) { |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 343 | dirent->inode = 0; |
| 344 | dir_modified++; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 345 | goto next; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 346 | } |
| 347 | } |
| 348 | if (!dirent->inode) |
| 349 | goto next; |
| 350 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 351 | if (check_name(fs, dirent, ino, &cd->pctx)) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 352 | dir_modified++; |
| 353 | |
| 354 | /* |
| 355 | * Make sure the inode listed is a legal one. |
| 356 | */ |
| 357 | if (((dirent->inode != EXT2_ROOT_INO) && |
Theodore Ts'o | 7f88b04 | 1997-04-26 14:48:50 +0000 | [diff] [blame] | 358 | (dirent->inode < EXT2_FIRST_INODE(fs->super))) || |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 359 | (dirent->inode > fs->super->s_inodes_count)) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 360 | if (fix_problem(fs, PR_2_BAD_INO, &cd->pctx)) { |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 361 | dirent->inode = 0; |
| 362 | dir_modified++; |
| 363 | goto next; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 364 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | /* |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 368 | * If the inode is unused, offer to clear it. |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 369 | */ |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 370 | if (!(ext2fs_test_inode_bitmap(inode_used_map, |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 371 | dirent->inode))) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 372 | if (fix_problem(fs, PR_2_UNUSED_INODE, &cd->pctx)) { |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 373 | dirent->inode = 0; |
| 374 | dir_modified++; |
| 375 | goto next; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 376 | } |
| 377 | } |
| 378 | |
| 379 | /* |
| 380 | * If the inode is in a bad block, offer to clear it. |
| 381 | */ |
| 382 | if (inode_bb_map && |
| 383 | (ext2fs_test_inode_bitmap(inode_bb_map, |
| 384 | dirent->inode))) { |
| 385 | if (fix_problem(fs, PR_2_BB_INODE, &cd->pctx)) { |
| 386 | dirent->inode = 0; |
| 387 | dir_modified++; |
| 388 | goto next; |
| 389 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | /* |
| 393 | * If the inode was marked as having bad fields in |
| 394 | * pass1, process it and offer to fix/clear it. |
| 395 | * (We wait until now so that we can display the |
| 396 | * pathname to the user.) |
| 397 | */ |
| 398 | if (inode_bad_map && |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 399 | ext2fs_test_inode_bitmap(inode_bad_map, |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 400 | dirent->inode)) { |
| 401 | if (process_bad_inode(fs, ino, dirent->inode)) { |
| 402 | dirent->inode = 0; |
| 403 | dir_modified++; |
| 404 | goto next; |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | /* |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 409 | * Don't allow links to the root directory. We check |
| 410 | * this specially to make sure we catch this error |
| 411 | * case even if the root directory hasn't been created |
| 412 | * yet. |
| 413 | */ |
| 414 | if ((dot_state > 2) && (dirent->inode == EXT2_ROOT_INO)) { |
| 415 | if (fix_problem(fs, PR_2_LINK_ROOT, &cd->pctx)) { |
| 416 | dirent->inode = 0; |
| 417 | dir_modified++; |
| 418 | goto next; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | /* |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 423 | * If this is a directory, then mark its parent in its |
| 424 | * dir_info structure. If the parent field is already |
| 425 | * filled in, then this directory has more than one |
| 426 | * hard link. We assume the first link is correct, |
| 427 | * and ask the user if he/she wants to clear this one. |
| 428 | */ |
| 429 | if ((dot_state > 2) && |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 430 | (ext2fs_test_inode_bitmap(inode_dir_map, |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 431 | dirent->inode))) { |
| 432 | subdir = get_dir_info(dirent->inode); |
| 433 | if (!subdir) { |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 434 | printf("INTERNAL ERROR: missing dir %u\n", |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 435 | dirent->inode); |
| 436 | fatal_error(0); |
| 437 | } |
| 438 | if (subdir->parent) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 439 | cd->pctx.ino2 = subdir->parent; |
| 440 | if (fix_problem(fs, PR_2_LINK_DIR, |
| 441 | &cd->pctx)) { |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 442 | dirent->inode = 0; |
| 443 | dir_modified++; |
| 444 | goto next; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 445 | } |
| 446 | cd->pctx.ino2 = 0; |
| 447 | } else |
| 448 | subdir->parent = ino; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 449 | } |
| 450 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 451 | ext2fs_icount_increment(inode_count, dirent->inode, &links); |
| 452 | if (links > 1) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 453 | fs_links_count++; |
| 454 | fs_total_count++; |
| 455 | next: |
| 456 | offset += dirent->rec_len; |
| 457 | } while (offset < fs->blocksize); |
| 458 | #if 0 |
| 459 | printf("\n"); |
| 460 | #endif |
| 461 | if (offset != fs->blocksize) { |
| 462 | printf("Final rec_len is %d, should be %d\n", |
| 463 | dirent->rec_len, |
| 464 | dirent->rec_len - fs->blocksize + offset); |
| 465 | } |
| 466 | if (dir_modified) { |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 467 | retval = ext2fs_write_dir_block(fs, block_nr, buf); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 468 | if (retval) { |
| 469 | com_err(program_name, retval, |
| 470 | "while writing directory block %d", block_nr); |
| 471 | } |
| 472 | ext2fs_mark_changed(fs); |
| 473 | } |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | /* |
| 478 | * This function is called to deallocate a block, and is an interator |
| 479 | * functioned called by deallocate inode via ext2fs_iterate_block(). |
| 480 | */ |
| 481 | static int deallocate_inode_block(ext2_filsys fs, |
| 482 | blk_t *block_nr, |
| 483 | int blockcnt, |
| 484 | void *private) |
| 485 | { |
| 486 | if (!*block_nr) |
| 487 | return 0; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 488 | ext2fs_unmark_block_bitmap(block_found_map, *block_nr); |
| 489 | ext2fs_unmark_block_bitmap(fs->block_map, *block_nr); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 490 | return 0; |
| 491 | } |
| 492 | |
| 493 | /* |
| 494 | * This fuction deallocates an inode |
| 495 | */ |
| 496 | static void deallocate_inode(ext2_filsys fs, ino_t ino, |
| 497 | char* block_buf) |
| 498 | { |
| 499 | errcode_t retval; |
| 500 | struct ext2_inode inode; |
| 501 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 502 | ext2fs_icount_store(inode_link_info, ino, 0); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 503 | e2fsck_read_inode(fs, ino, &inode, "deallocate_inode"); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 504 | inode.i_links_count = 0; |
| 505 | inode.i_dtime = time(0); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 506 | e2fsck_write_inode(fs, ino, &inode, "deallocate_inode"); |
| 507 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 508 | /* |
| 509 | * Fix up the bitmaps... |
| 510 | */ |
| 511 | read_bitmaps(fs); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 512 | ext2fs_unmark_inode_bitmap(inode_used_map, ino); |
| 513 | ext2fs_unmark_inode_bitmap(inode_dir_map, ino); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 514 | if (inode_bad_map) |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 515 | ext2fs_unmark_inode_bitmap(inode_bad_map, ino); |
| 516 | ext2fs_unmark_inode_bitmap(fs->inode_map, ino); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 517 | ext2fs_mark_ib_dirty(fs); |
| 518 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 519 | if (!ext2fs_inode_has_valid_blocks(&inode)) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 520 | return; |
| 521 | |
| 522 | ext2fs_mark_bb_dirty(fs); |
| 523 | retval = ext2fs_block_iterate(fs, ino, 0, block_buf, |
| 524 | deallocate_inode_block, 0); |
| 525 | if (retval) |
| 526 | com_err("deallocate_inode", retval, |
| 527 | "while calling ext2fs_block_iterate for inode %d", |
| 528 | ino); |
| 529 | } |
| 530 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 531 | static int process_bad_inode(ext2_filsys fs, ino_t dir, ino_t ino) |
| 532 | { |
| 533 | struct ext2_inode inode; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 534 | int inode_modified = 0; |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 535 | unsigned char *frag, *fsize; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 536 | struct problem_context pctx; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 537 | |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 538 | e2fsck_read_inode(fs, ino, &inode, "process_bad_inode"); |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 539 | |
| 540 | clear_problem_context(&pctx); |
| 541 | pctx.ino = ino; |
| 542 | pctx.dir = dir; |
| 543 | pctx.inode = &inode; |
| 544 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 545 | if (!LINUX_S_ISDIR(inode.i_mode) && !LINUX_S_ISREG(inode.i_mode) && |
| 546 | !LINUX_S_ISCHR(inode.i_mode) && !LINUX_S_ISBLK(inode.i_mode) && |
| 547 | !LINUX_S_ISLNK(inode.i_mode) && !LINUX_S_ISFIFO(inode.i_mode) && |
| 548 | !(LINUX_S_ISSOCK(inode.i_mode))) { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 549 | if (fix_problem(fs, PR_2_BAD_MODE, &pctx)) { |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 550 | deallocate_inode(fs, ino, 0); |
| 551 | return 1; |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 552 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 553 | } |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 554 | if (inode.i_faddr && |
| 555 | fix_problem(fs, PR_2_FADDR_ZERO, &pctx)) { |
| 556 | inode.i_faddr = 0; |
| 557 | inode_modified++; |
| 558 | } |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 559 | |
| 560 | switch (fs->super->s_creator_os) { |
| 561 | case EXT2_OS_LINUX: |
| 562 | frag = &inode.osd2.linux2.l_i_frag; |
| 563 | fsize = &inode.osd2.linux2.l_i_fsize; |
| 564 | break; |
| 565 | case EXT2_OS_HURD: |
| 566 | frag = &inode.osd2.hurd2.h_i_frag; |
| 567 | fsize = &inode.osd2.hurd2.h_i_fsize; |
| 568 | break; |
| 569 | case EXT2_OS_MASIX: |
| 570 | frag = &inode.osd2.masix2.m_i_frag; |
| 571 | fsize = &inode.osd2.masix2.m_i_fsize; |
| 572 | break; |
| 573 | default: |
| 574 | frag = fsize = 0; |
| 575 | } |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 576 | if (frag && *frag) { |
| 577 | pctx.num = *frag; |
| 578 | if (fix_problem(fs, PR_2_FRAG_ZERO, &pctx)) { |
| 579 | *frag = 0; |
| 580 | inode_modified++; |
| 581 | } |
| 582 | pctx.num = 0; |
| 583 | } |
| 584 | if (fsize && *fsize) { |
| 585 | pctx.num = *fsize; |
| 586 | if (fix_problem(fs, PR_2_FSIZE_ZERO, &pctx)) { |
| 587 | *fsize = 0; |
| 588 | inode_modified++; |
| 589 | } |
| 590 | pctx.num = 0; |
| 591 | } |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 592 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 593 | if (inode.i_file_acl && |
| 594 | fix_problem(fs, PR_2_FILE_ACL_ZERO, &pctx)) { |
| 595 | inode.i_file_acl = 0; |
| 596 | inode_modified++; |
| 597 | } |
| 598 | if (inode.i_dir_acl && |
| 599 | fix_problem(fs, PR_2_DIR_ACL_ZERO, &pctx)) { |
| 600 | inode.i_dir_acl = 0; |
| 601 | inode_modified++; |
| 602 | } |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 603 | if (inode_modified) |
| 604 | e2fsck_write_inode(fs, ino, &inode, "process_bad_inode"); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 605 | return 0; |
| 606 | } |
| 607 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 608 | |
| 609 | /* |
| 610 | * allocate_dir_block --- this function allocates a new directory |
| 611 | * block for a particular inode; this is done if a directory has |
| 612 | * a "hole" in it, or if a directory has a illegal block number |
| 613 | * that was zeroed out and now needs to be replaced. |
| 614 | */ |
| 615 | static int allocate_dir_block(ext2_filsys fs, |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 616 | struct ext2_db_entry *db, |
| 617 | char *buf, struct problem_context *pctx) |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 618 | { |
| 619 | blk_t blk; |
| 620 | char *block; |
| 621 | struct ext2_inode inode; |
| 622 | errcode_t retval; |
| 623 | |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 624 | if (fix_problem(fs, PR_2_DIRECTORY_HOLE, pctx) == 0) |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 625 | return 1; |
| 626 | |
| 627 | /* |
| 628 | * Read the inode and block bitmaps in; we'll be messing with |
| 629 | * them. |
| 630 | */ |
| 631 | read_bitmaps(fs); |
| 632 | |
| 633 | /* |
| 634 | * First, find a free block |
| 635 | */ |
| 636 | retval = ext2fs_new_block(fs, 0, block_found_map, &blk); |
| 637 | if (retval) { |
| 638 | com_err("allocate_dir_block", retval, |
| 639 | "while trying to fill a hole in a directory inode"); |
| 640 | return 1; |
| 641 | } |
| 642 | ext2fs_mark_block_bitmap(block_found_map, blk); |
| 643 | ext2fs_mark_block_bitmap(fs->block_map, blk); |
| 644 | ext2fs_mark_bb_dirty(fs); |
| 645 | |
| 646 | /* |
| 647 | * Now let's create the actual data block for the inode |
| 648 | */ |
| 649 | if (db->blockcnt) |
| 650 | retval = ext2fs_new_dir_block(fs, 0, 0, &block); |
| 651 | else |
| 652 | retval = ext2fs_new_dir_block(fs, db->ino, EXT2_ROOT_INO, |
| 653 | &block); |
| 654 | |
| 655 | if (retval) { |
| 656 | com_err("allocate_dir_block", retval, |
| 657 | "while creating new directory block"); |
| 658 | return 1; |
| 659 | } |
| 660 | |
| 661 | retval = ext2fs_write_dir_block(fs, blk, block); |
| 662 | free(block); |
| 663 | if (retval) { |
| 664 | com_err("allocate_dir_block", retval, |
| 665 | "while writing an empty directory block"); |
| 666 | return 1; |
| 667 | } |
| 668 | |
| 669 | /* |
| 670 | * Update the inode block count |
| 671 | */ |
| 672 | e2fsck_read_inode(fs, db->ino, &inode, "allocate_dir_block"); |
| 673 | inode.i_blocks += fs->blocksize / 512; |
| 674 | if (inode.i_size < (db->blockcnt+1) * fs->blocksize) |
| 675 | inode.i_size = (db->blockcnt+1) * fs->blocksize; |
| 676 | e2fsck_write_inode(fs, db->ino, &inode, "allocate_dir_block"); |
| 677 | |
| 678 | /* |
| 679 | * Finally, update the block pointers for the inode |
| 680 | */ |
| 681 | db->blk = blk; |
| 682 | retval = ext2fs_block_iterate(fs, db->ino, BLOCK_FLAG_HOLE, |
| 683 | 0, update_dir_block, db); |
| 684 | if (retval) { |
| 685 | com_err("allocate_dir_block", retval, |
| 686 | "while calling ext2fs_block_iterate"); |
| 687 | return 1; |
| 688 | } |
| 689 | |
| 690 | return 0; |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * This is a helper function for allocate_dir_block(). |
| 695 | */ |
| 696 | static int update_dir_block(ext2_filsys fs, |
| 697 | blk_t *block_nr, |
| 698 | int blockcnt, |
| 699 | void *private) |
| 700 | { |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 701 | struct ext2_db_entry *db = private; |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 702 | |
| 703 | if (db->blockcnt == blockcnt) { |
| 704 | *block_nr = db->blk; |
| 705 | return BLOCK_CHANGED; |
| 706 | } |
| 707 | return 0; |
| 708 | } |
| 709 | |