29 |
|
|
30 |
/* Filetype used in directory entry. */ |
/* Filetype used in directory entry. */ |
31 |
#define FILETYPE_UNKNOWN 0 |
#define FILETYPE_UNKNOWN 0 |
32 |
|
#define FILETYPE_REG 1 |
33 |
#define FILETYPE_DIRECTORY 2 |
#define FILETYPE_DIRECTORY 2 |
34 |
#define FILETYPE_SYMLINK 7 |
#define FILETYPE_SYMLINK 7 |
35 |
|
|
36 |
/* Filetype information as used in inodes. */ |
/* Filetype information as used in inodes. */ |
37 |
#define FILETYPE_INO_MASK 0170000 |
#define FILETYPE_INO_MASK 0170000 |
38 |
|
#define FILETYPE_INO_REG 0100000 |
39 |
#define FILETYPE_INO_DIRECTORY 0040000 |
#define FILETYPE_INO_DIRECTORY 0040000 |
40 |
#define FILETYPE_INO_SYMLINK 0120000 |
#define FILETYPE_INO_SYMLINK 0120000 |
41 |
|
|
46 |
#include <grub/disk.h> |
#include <grub/disk.h> |
47 |
#include <grub/dl.h> |
#include <grub/dl.h> |
48 |
#include <grub/types.h> |
#include <grub/types.h> |
49 |
|
#include <grub/fshelp.h> |
50 |
|
|
51 |
/* Log2 size of ext2 block in 512 blocks. */ |
/* Log2 size of ext2 block in 512 blocks. */ |
52 |
#define LOG2_EXT2_BLOCK_SIZE(data) \ |
#define LOG2_EXT2_BLOCK_SIZE(data) \ |
60 |
#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) |
#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) |
61 |
|
|
62 |
/* The ext2 superblock. */ |
/* The ext2 superblock. */ |
63 |
struct grub_ext_sblock |
struct grub_ext2_sblock |
64 |
{ |
{ |
65 |
grub_uint32_t total_inodes; |
grub_uint32_t total_inodes; |
66 |
grub_uint32_t total_blocks; |
grub_uint32_t total_blocks; |
100 |
}; |
}; |
101 |
|
|
102 |
/* The ext2 blockgroup. */ |
/* The ext2 blockgroup. */ |
103 |
struct ext2_block_group |
struct grub_ext2_block_group |
104 |
{ |
{ |
105 |
grub_uint32_t block_id; |
grub_uint32_t block_id; |
106 |
grub_uint32_t inode_id; |
grub_uint32_t inode_id; |
153 |
grub_uint8_t filetype; |
grub_uint8_t filetype; |
154 |
}; |
}; |
155 |
|
|
156 |
|
struct grub_fshelp_node |
157 |
|
{ |
158 |
|
struct grub_ext2_data *data; |
159 |
|
struct grub_ext2_inode inode; |
160 |
|
int ino; |
161 |
|
int inode_read; |
162 |
|
}; |
163 |
|
|
164 |
/* Information about a "mounted" ext2 filesystem. */ |
/* Information about a "mounted" ext2 filesystem. */ |
165 |
struct grub_ext2_data |
struct grub_ext2_data |
166 |
{ |
{ |
167 |
struct grub_ext_sblock sblock; |
struct grub_ext2_sblock sblock; |
168 |
grub_disk_t disk; |
grub_disk_t disk; |
169 |
struct grub_ext2_inode inode; |
struct grub_ext2_inode *inode; |
170 |
|
struct grub_fshelp_node diropen; |
171 |
}; |
}; |
172 |
|
|
173 |
#ifndef GRUB_UTIL |
#ifndef GRUB_UTIL |
178 |
the mounted filesystem DATA. */ |
the mounted filesystem DATA. */ |
179 |
inline static grub_err_t |
inline static grub_err_t |
180 |
grub_ext2_blockgroup (struct grub_ext2_data *data, int group, |
grub_ext2_blockgroup (struct grub_ext2_data *data, int group, |
181 |
struct ext2_block_group *blkgrp) |
struct grub_ext2_block_group *blkgrp) |
182 |
{ |
{ |
183 |
return grub_disk_read (data->disk, |
return grub_disk_read (data->disk, |
184 |
((grub_le_to_cpu32 (data->sblock.first_data_block) + 1) |
((grub_le_to_cpu32 (data->sblock.first_data_block) + 1) |
185 |
<< LOG2_EXT2_BLOCK_SIZE (data)), |
<< LOG2_EXT2_BLOCK_SIZE (data)), |
186 |
group * sizeof (struct ext2_block_group), |
group * sizeof (struct grub_ext2_block_group), |
187 |
sizeof (struct ext2_block_group), (char *) blkgrp); |
sizeof (struct grub_ext2_block_group), (char *) blkgrp); |
188 |
} |
} |
189 |
|
|
190 |
/* Return in BLOCK the on disk block number of block FILEBLOCK in the |
|
191 |
opened file descibed by DATA. If this block is not stored on disk |
static int |
192 |
in case of a sparse file return 0. */ |
grub_ext2_read_block (grub_fshelp_node_t node, int fileblock) |
|
static grub_err_t |
|
|
grub_ext2_get_file_block (struct grub_ext2_data *data, |
|
|
int fileblock, int *block) |
|
193 |
{ |
{ |
194 |
|
struct grub_ext2_data *data = node->data; |
195 |
|
struct grub_ext2_inode *inode = &node->inode; |
196 |
int blknr; |
int blknr; |
197 |
struct grub_ext2_inode *inode = &data->inode; |
int blksz = EXT2_BLOCK_SIZE (data); |
198 |
|
int log2_blksz = LOG2_EXT2_BLOCK_SIZE (data); |
199 |
|
|
200 |
/* Direct blocks. */ |
/* Direct blocks. */ |
201 |
if (fileblock < INDIRECT_BLOCKS) |
if (fileblock < INDIRECT_BLOCKS) |
202 |
blknr = grub_le_to_cpu32 (inode->blocks.dir_blocks[fileblock]); |
blknr = grub_le_to_cpu32 (inode->blocks.dir_blocks[fileblock]); |
203 |
/* Indirect. */ |
/* Indirect. */ |
204 |
else if (fileblock < INDIRECT_BLOCKS + EXT2_BLOCK_SIZE (data) / 4) |
else if (fileblock < INDIRECT_BLOCKS + blksz / 4) |
205 |
{ |
{ |
206 |
grub_uint32_t indir[EXT2_BLOCK_SIZE (data) / 4]; |
grub_uint32_t indir[blksz / 4]; |
207 |
|
|
208 |
if (grub_disk_read (data->disk, |
if (grub_disk_read (data->disk, |
209 |
grub_le_to_cpu32 (inode->blocks.indir_block) |
grub_le_to_cpu32 (inode->blocks.indir_block) |
210 |
<< LOG2_EXT2_BLOCK_SIZE (data), |
<< log2_blksz, |
211 |
0, EXT2_BLOCK_SIZE (data), (char *) indir)) |
0, blksz, (char *) indir)) |
212 |
return grub_errno; |
return grub_errno; |
213 |
|
|
214 |
blknr = grub_le_to_cpu32 (indir[fileblock - INDIRECT_BLOCKS]); |
blknr = grub_le_to_cpu32 (indir[fileblock - INDIRECT_BLOCKS]); |
215 |
} |
} |
216 |
/* Double indirect. */ |
/* Double indirect. */ |
217 |
else if (fileblock < INDIRECT_BLOCKS + EXT2_BLOCK_SIZE (data) / 4 |
else if (fileblock < INDIRECT_BLOCKS + blksz / 4 * (blksz / 4 + 1)) |
|
* (EXT2_BLOCK_SIZE (data) / 4 + 1)) |
|
218 |
{ |
{ |
219 |
unsigned int perblock = EXT2_BLOCK_SIZE (data) / 4; |
unsigned int perblock = blksz / 4; |
220 |
unsigned int rblock = fileblock - (INDIRECT_BLOCKS |
unsigned int rblock = fileblock - (INDIRECT_BLOCKS |
221 |
+ EXT2_BLOCK_SIZE (data) / 4); |
+ blksz / 4); |
222 |
grub_uint32_t indir[EXT2_BLOCK_SIZE (data) / 4]; |
grub_uint32_t indir[blksz / 4]; |
223 |
|
|
224 |
if (grub_disk_read (data->disk, |
if (grub_disk_read (data->disk, |
225 |
grub_le_to_cpu32 (inode->blocks.double_indir_block) |
grub_le_to_cpu32 (inode->blocks.double_indir_block) |
226 |
<< LOG2_EXT2_BLOCK_SIZE (data), |
<< log2_blksz, |
227 |
0, EXT2_BLOCK_SIZE (data), (char *) indir)) |
0, blksz, (char *) indir)) |
228 |
return grub_errno; |
return grub_errno; |
229 |
|
|
230 |
if (grub_disk_read (data->disk, |
if (grub_disk_read (data->disk, |
231 |
grub_le_to_cpu32 (indir[rblock / perblock]) |
grub_le_to_cpu32 (indir[rblock / perblock]) |
232 |
<< LOG2_EXT2_BLOCK_SIZE (data), |
<< log2_blksz, |
233 |
0, EXT2_BLOCK_SIZE (data), (char *) indir)) |
0, blksz, (char *) indir)) |
234 |
return grub_errno; |
return grub_errno; |
235 |
|
|
236 |
|
|
244 |
return grub_errno; |
return grub_errno; |
245 |
} |
} |
246 |
|
|
247 |
*block = blknr; |
return blknr; |
|
|
|
|
return 0; |
|
248 |
} |
} |
249 |
|
|
250 |
|
|
251 |
/* Read LEN bytes from the file described by DATA starting with byte |
/* Read LEN bytes from the file described by DATA starting with byte |
252 |
POS. Return the amount of read bytes in READ. */ |
POS. Return the amount of read bytes in READ. */ |
253 |
static grub_ssize_t |
static grub_ssize_t |
254 |
grub_ext2_read_file (struct grub_ext2_data *data, |
grub_ext2_read_file (grub_fshelp_node_t node, |
255 |
void (*read_hook) (unsigned long sector, |
void (*read_hook) (unsigned long sector, |
256 |
unsigned offset, unsigned length), |
unsigned offset, unsigned length), |
257 |
int pos, unsigned int len, char *buf) |
int pos, unsigned int len, char *buf) |
258 |
{ |
{ |
259 |
int i; |
return grub_fshelp_read_file (node->data->disk, node, read_hook, |
260 |
int blockcnt; |
pos, len, buf, grub_ext2_read_block, |
261 |
|
node->inode.size, |
262 |
/* Adjust len so it we can't read past the end of the file. */ |
LOG2_EXT2_BLOCK_SIZE (node->data)); |
263 |
if (len > grub_le_to_cpu32 (data->inode.size)) |
|
|
len = grub_le_to_cpu32 (data->inode.size); |
|
|
|
|
|
blockcnt = ((len + pos) |
|
|
+ EXT2_BLOCK_SIZE (data) - 1) / EXT2_BLOCK_SIZE (data); |
|
|
|
|
|
for (i = pos / EXT2_BLOCK_SIZE (data); i < blockcnt; i++) |
|
|
{ |
|
|
int blknr; |
|
|
int blockoff = pos % EXT2_BLOCK_SIZE (data); |
|
|
int blockend = EXT2_BLOCK_SIZE (data); |
|
|
|
|
|
int skipfirst = 0; |
|
|
|
|
|
grub_ext2_get_file_block (data, i, &blknr); |
|
|
if (grub_errno) |
|
|
return -1; |
|
|
|
|
|
blknr = blknr << LOG2_EXT2_BLOCK_SIZE (data); |
|
|
|
|
|
/* Last block. */ |
|
|
if (i == blockcnt - 1) |
|
|
{ |
|
|
blockend = (len + pos) % EXT2_BLOCK_SIZE (data); |
|
|
|
|
|
/* The last portion is exactly EXT2_BLOCK_SIZE (data). */ |
|
|
if (!blockend) |
|
|
blockend = EXT2_BLOCK_SIZE (data); |
|
|
} |
|
|
|
|
|
/* First block. */ |
|
|
if (i == pos / EXT2_BLOCK_SIZE (data)) |
|
|
{ |
|
|
skipfirst = blockoff; |
|
|
blockend -= skipfirst; |
|
|
} |
|
|
|
|
|
/* If the block number is 0 this block is not stored on disk but |
|
|
is zero filled instead. */ |
|
|
if (blknr) |
|
|
{ |
|
|
data->disk->read_hook = read_hook; |
|
|
grub_disk_read (data->disk, blknr, skipfirst, |
|
|
blockend, buf); |
|
|
data->disk->read_hook = 0; |
|
|
if (grub_errno) |
|
|
return -1; |
|
|
} |
|
|
else |
|
|
grub_memset (buf, EXT2_BLOCK_SIZE (data) - skipfirst, 0); |
|
|
|
|
|
buf += EXT2_BLOCK_SIZE (data) - skipfirst; |
|
|
} |
|
|
|
|
|
return len; |
|
264 |
} |
} |
265 |
|
|
266 |
|
|
269 |
grub_ext2_read_inode (struct grub_ext2_data *data, |
grub_ext2_read_inode (struct grub_ext2_data *data, |
270 |
int ino, struct grub_ext2_inode *inode) |
int ino, struct grub_ext2_inode *inode) |
271 |
{ |
{ |
272 |
struct ext2_block_group blkgrp; |
struct grub_ext2_block_group blkgrp; |
273 |
struct grub_ext_sblock *sblock = &data->sblock; |
struct grub_ext2_sblock *sblock = &data->sblock; |
274 |
int inodes_per_block; |
int inodes_per_block; |
275 |
|
|
276 |
unsigned int blkno; |
unsigned int blkno; |
311 |
return 0; |
return 0; |
312 |
|
|
313 |
/* Read the superblock. */ |
/* Read the superblock. */ |
314 |
grub_disk_read (disk, 1 * 2, 0, sizeof (struct grub_ext_sblock), |
grub_disk_read (disk, 1 * 2, 0, sizeof (struct grub_ext2_sblock), |
315 |
(char *) &data->sblock); |
(char *) &data->sblock); |
316 |
if (grub_errno) |
if (grub_errno) |
317 |
goto fail; |
goto fail; |
320 |
if (grub_le_to_cpu16 (data->sblock.magic) != EXT2_MAGIC) |
if (grub_le_to_cpu16 (data->sblock.magic) != EXT2_MAGIC) |
321 |
goto fail; |
goto fail; |
322 |
|
|
323 |
|
data->diropen.data = data; |
324 |
|
data->diropen.ino = 2; |
325 |
|
data->diropen.inode_read = 1; |
326 |
|
|
327 |
|
data->inode = &data->diropen.inode; |
328 |
data->disk = disk; |
data->disk = disk; |
329 |
|
|
330 |
|
grub_ext2_read_inode (data, 2, data->inode); |
331 |
|
if (grub_errno) |
332 |
|
goto fail; |
333 |
|
|
334 |
return data; |
return data; |
335 |
|
|
336 |
fail: |
fail: |
339 |
return 0; |
return 0; |
340 |
} |
} |
341 |
|
|
342 |
/* Find the file with the pathname PATH on the filesystem described by |
static char * |
343 |
DATA. Return its inode number in INO. */ |
grub_ext2_read_symlink (grub_fshelp_node_t node) |
|
static grub_err_t |
|
|
grub_ext2_find_file (struct grub_ext2_data *data, const char *path, int *ino) |
|
344 |
{ |
{ |
345 |
int blocksize = EXT2_BLOCK_SIZE (data) |
char *symlink; |
346 |
<< grub_le_to_cpu32 (data->sblock.log2_block_size); |
struct grub_fshelp_node *diro = node; |
347 |
struct grub_ext2_inode *inode = &data->inode; |
|
348 |
int currinode = 2; |
if (!diro->inode_read) |
|
int symlinkcnt = 0; |
|
|
|
|
|
char fpath[EXT2_PATH_MAX]; |
|
|
char *name = fpath; |
|
|
|
|
|
grub_strncpy (fpath, path, EXT2_PATH_MAX); |
|
|
|
|
|
if (!name || name[0] != '/') |
|
|
{ |
|
|
grub_error (GRUB_ERR_BAD_FILENAME, "bad filename"); |
|
|
return grub_errno; |
|
|
} |
|
|
|
|
|
/* Skip the first slash. */ |
|
|
name++; |
|
|
if (!*name) |
|
349 |
{ |
{ |
350 |
*ino = 2; |
grub_ext2_read_inode (diro->data, diro->ino, &diro->inode); |
351 |
return 0; |
if (grub_errno) |
352 |
|
return 0; |
353 |
} |
} |
354 |
|
|
355 |
/* Remove trailing "/". */ |
symlink = grub_malloc (grub_le_to_cpu32 (diro->inode.size) + 1); |
356 |
if (name[grub_strlen (name) - 1] =='/') |
if (!symlink) |
357 |
name[grub_strlen (name) - 1] = '\0'; |
return 0; |
358 |
|
|
359 |
while (*name) |
/* If the filesize of the symlink is bigger than |
360 |
|
60 the symlink is stored in a separate block, |
361 |
|
otherwise it is stored in the inode. */ |
362 |
|
if (grub_le_to_cpu32 (diro->inode.size) <= 60) |
363 |
|
grub_strncpy (symlink, |
364 |
|
diro->inode.symlink, |
365 |
|
grub_le_to_cpu32 (diro->inode.size)); |
366 |
|
else |
367 |
{ |
{ |
368 |
unsigned int fpos = 0; |
grub_ext2_read_file (diro, 0, 0, |
369 |
char *next; |
grub_le_to_cpu32 (diro->inode.size), |
370 |
int namesize; |
symlink); |
371 |
|
if (grub_errno) |
|
/* Extract the actual part from the pathname. */ |
|
|
next = grub_strchr (name, '/'); |
|
|
if (next) |
|
372 |
{ |
{ |
373 |
next[0] = '\0'; |
grub_free (symlink); |
374 |
next++; |
return 0; |
375 |
} |
} |
376 |
|
} |
377 |
|
|
378 |
|
symlink[grub_le_to_cpu32 (diro->inode.size)] = '\0'; |
379 |
|
return symlink; |
380 |
|
} |
381 |
|
|
382 |
namesize = grub_strlen (name); |
static int |
383 |
|
grub_ext2_iterate_dir (grub_fshelp_node_t dir, |
384 |
|
int NESTED_FUNC_ATTR |
385 |
|
(*hook) (const char *filename, |
386 |
|
enum grub_fshelp_filetype filetype, |
387 |
|
grub_fshelp_node_t node)) |
388 |
|
{ |
389 |
|
unsigned int fpos = 0; |
390 |
|
struct grub_fshelp_node *diro = (struct grub_fshelp_node *) dir; |
391 |
|
|
392 |
|
if (!diro->inode_read) |
393 |
|
{ |
394 |
|
grub_ext2_read_inode (diro->data, diro->ino, &diro->inode); |
395 |
|
if (grub_errno) |
396 |
|
return 0; |
397 |
|
} |
398 |
|
|
399 |
|
/* Search the file. */ |
400 |
|
while (fpos < grub_le_to_cpu32 (diro->inode.size)) |
401 |
|
{ |
402 |
|
struct ext2_dirent dirent; |
403 |
|
|
404 |
/* Open the file. */ |
grub_ext2_read_file (diro, 0, fpos, sizeof (struct ext2_dirent), |
405 |
grub_ext2_read_inode (data, currinode, inode); |
(char *) &dirent); |
406 |
if (grub_errno) |
if (grub_errno) |
407 |
goto fail; |
return 0; |
408 |
|
|
409 |
/* Search the file. */ |
if (dirent.namelen != 0) |
|
while (fpos < grub_le_to_cpu32 (inode->size)) |
|
410 |
{ |
{ |
411 |
struct ext2_dirent dirent; |
char filename[dirent.namelen + 1]; |
412 |
|
struct grub_fshelp_node *fdiro; |
413 |
/* Read the directory entry. */ |
enum grub_fshelp_filetype type = GRUB_FSHELP_UNKNOWN; |
414 |
grub_ext2_read_file (data, 0, fpos, sizeof (struct ext2_dirent), |
|
415 |
(char *) &dirent); |
grub_ext2_read_file (diro, 0, fpos + sizeof (struct ext2_dirent), |
416 |
|
dirent.namelen, filename); |
417 |
if (grub_errno) |
if (grub_errno) |
418 |
goto fail; |
return 0; |
419 |
|
|
420 |
|
fdiro = grub_malloc (sizeof (struct grub_fshelp_node)); |
421 |
|
if (!fdiro) |
422 |
|
return 0; |
423 |
|
|
424 |
|
fdiro->data = diro->data; |
425 |
|
fdiro->ino = grub_le_to_cpu32 (dirent.inode); |
426 |
|
|
427 |
|
filename[dirent.namelen] = '\0'; |
428 |
|
|
429 |
if (dirent.namelen != 0) |
if (dirent.filetype != FILETYPE_UNKNOWN) |
430 |
{ |
{ |
431 |
char filename[dirent.namelen + 1]; |
fdiro->inode_read = 0; |
432 |
|
|
433 |
/* Read the filename part of this directory entry. */ |
if (dirent.filetype == FILETYPE_DIRECTORY) |
434 |
grub_ext2_read_file (data, 0, fpos |
type = GRUB_FSHELP_DIR; |
435 |
+ sizeof (struct ext2_dirent), |
else if (dirent.filetype == FILETYPE_SYMLINK) |
436 |
dirent.namelen, filename); |
type = GRUB_FSHELP_SYMLINK; |
437 |
|
else if (dirent.filetype == FILETYPE_REG) |
438 |
|
type = GRUB_FSHELP_REG; |
439 |
|
} |
440 |
|
else |
441 |
|
{ |
442 |
|
/* The filetype can not be read from the dirent, read |
443 |
|
the inode to get more information. */ |
444 |
|
grub_ext2_read_inode (diro->data, grub_le_to_cpu32 (dirent.inode), |
445 |
|
&fdiro->inode); |
446 |
if (grub_errno) |
if (grub_errno) |
|
goto fail; |
|
|
|
|
|
filename[dirent.namelen] = '\0'; |
|
|
|
|
|
/* Check if the current directory entry described the |
|
|
file we are looking for. */ |
|
|
if (dirent.namelen == namesize |
|
|
&& !grub_strncmp (name, filename, namesize)) |
|
447 |
{ |
{ |
448 |
/* Stat the inode. */ |
grub_free (fdiro); |
449 |
grub_ext2_read_inode (data, |
return 0; |
|
grub_le_to_cpu32 (dirent.inode), |
|
|
inode); |
|
|
|
|
|
/* If this is a symlink, follow it. */ |
|
|
if ((grub_le_to_cpu16 (data->inode.mode) |
|
|
& FILETYPE_INO_MASK) == FILETYPE_INO_SYMLINK) |
|
|
{ |
|
|
/* XXX: Use malloc instead? */ |
|
|
char symlink[blocksize]; |
|
|
|
|
|
if (++symlinkcnt == EXT2_MAX_SYMLINKCNT) |
|
|
{ |
|
|
grub_error (GRUB_ERR_SYMLINK_LOOP, |
|
|
"too deep nesting of symlinks"); |
|
|
goto fail; |
|
|
} |
|
|
|
|
|
/* If the filesize of the symlink is bigger than |
|
|
60 the symlink is stored in a separate block, |
|
|
otherwise it is stored in the inode. */ |
|
|
if (grub_le_to_cpu32 (inode->size) <= 60) |
|
|
grub_strncpy (symlink, |
|
|
inode->symlink, |
|
|
grub_le_to_cpu32 (inode->size)); |
|
|
else |
|
|
{ |
|
|
grub_ext2_read_file (data, 0, 0, |
|
|
grub_le_to_cpu32 (inode->size), |
|
|
symlink); |
|
|
if (grub_errno) |
|
|
goto fail; |
|
|
} |
|
|
|
|
|
symlink[grub_le_to_cpu32 (inode->size)] = '\0'; |
|
|
|
|
|
/* Check if the symlink is absolute or relative. */ |
|
|
if (symlink[0] == '/') |
|
|
{ |
|
|
grub_strncpy (fpath, symlink + 1, EXT2_PATH_MAX); |
|
|
name = fpath; |
|
|
currinode = 2; |
|
|
} |
|
|
else |
|
|
{ |
|
|
char *bak = 0; |
|
|
|
|
|
if (next) |
|
|
{ |
|
|
bak = grub_strdup (next); |
|
|
if (!bak) |
|
|
goto fail; |
|
|
} |
|
|
|
|
|
/* Relative symlink, construct the new path. */ |
|
|
grub_strcpy (fpath, symlink); |
|
|
name = fpath; |
|
|
|
|
|
if (next) |
|
|
{ |
|
|
grub_strcat (name, "/"); |
|
|
grub_strcat (name, bak); |
|
|
grub_free (bak); |
|
|
} |
|
|
} |
|
|
|
|
|
fpos = 0; |
|
|
break; |
|
|
} |
|
|
|
|
|
if (next) |
|
|
{ |
|
|
currinode = grub_le_to_cpu32 (dirent.inode); |
|
|
name = next; |
|
|
|
|
|
if ((grub_le_to_cpu16 (data->inode.mode) |
|
|
& FILETYPE_INO_MASK) != FILETYPE_INO_DIRECTORY) |
|
|
{ |
|
|
grub_error (GRUB_ERR_BAD_FILE_TYPE, |
|
|
"not a directory"); |
|
|
goto fail; |
|
|
} |
|
|
break; |
|
|
} |
|
|
else /* Found it! */ |
|
|
{ |
|
|
*ino = grub_le_to_cpu32 (dirent.inode); |
|
|
return 0; |
|
|
} |
|
450 |
} |
} |
451 |
|
|
452 |
|
fdiro->inode_read = 1; |
453 |
|
|
454 |
|
if ((grub_le_to_cpu16 (diro->inode.mode) |
455 |
|
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY) |
456 |
|
type = GRUB_FSHELP_DIR; |
457 |
|
else if ((grub_le_to_cpu16 (diro->inode.mode) |
458 |
|
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY) |
459 |
|
type = GRUB_FSHELP_SYMLINK; |
460 |
|
else if ((grub_le_to_cpu16 (diro->inode.mode) |
461 |
|
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY) |
462 |
|
type = GRUB_FSHELP_REG; |
463 |
} |
} |
464 |
|
|
465 |
/* Move to next directory entry. */ |
if (hook (filename, type, fdiro)) |
466 |
fpos += grub_le_to_cpu16 (dirent.direntlen); |
return 1; |
|
} |
|
|
|
|
|
/* The complete directory was read and no matching file was |
|
|
found. */ |
|
|
if (fpos >= grub_le_to_cpu32 (inode->size)) |
|
|
{ |
|
|
grub_error (GRUB_ERR_FILE_NOT_FOUND, "file not found"); |
|
|
goto fail; |
|
467 |
} |
} |
468 |
|
|
469 |
|
fpos += grub_le_to_cpu16 (dirent.direntlen); |
470 |
} |
} |
471 |
|
|
472 |
fail: |
return 0; |
|
return grub_errno; |
|
473 |
} |
} |
474 |
|
|
475 |
/* Open a file named NAME and initialize FILE. */ |
/* Open a file named NAME and initialize FILE. */ |
477 |
grub_ext2_open (struct grub_file *file, const char *name) |
grub_ext2_open (struct grub_file *file, const char *name) |
478 |
{ |
{ |
479 |
struct grub_ext2_data *data; |
struct grub_ext2_data *data; |
480 |
int ino; |
struct grub_fshelp_node *fdiro = 0; |
481 |
|
|
482 |
#ifndef GRUB_UTIL |
#ifndef GRUB_UTIL |
483 |
grub_dl_ref (my_mod); |
grub_dl_ref (my_mod); |
484 |
#endif |
#endif |
485 |
|
|
486 |
data = grub_ext2_mount (file->device->disk); |
data = grub_ext2_mount (file->device->disk); |
487 |
if (!data) |
if (!data) |
488 |
goto fail; |
goto fail; |
489 |
|
|
490 |
grub_ext2_find_file (data, name, &ino); |
grub_fshelp_find_file (name, &data->diropen, &fdiro, grub_ext2_iterate_dir, |
491 |
if (grub_errno) |
grub_ext2_read_symlink, GRUB_FSHELP_REG); |
|
goto fail; |
|
|
|
|
|
grub_ext2_read_inode (data, ino, &data->inode); |
|
492 |
if (grub_errno) |
if (grub_errno) |
493 |
goto fail; |
goto fail; |
494 |
|
|
495 |
if (!(grub_le_to_cpu16 (data->inode.mode) & 0100000)) |
if (!fdiro->inode_read) |
496 |
{ |
{ |
497 |
grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a regular file"); |
grub_ext2_read_inode (data, fdiro->ino, &fdiro->inode); |
498 |
goto fail; |
if (grub_errno) |
499 |
|
goto fail; |
500 |
} |
} |
501 |
|
|
502 |
file->size = grub_le_to_cpu32 (data->inode.size); |
grub_memcpy (data->inode, &fdiro->inode, sizeof (struct grub_ext2_inode)); |
503 |
|
grub_free (fdiro); |
504 |
|
|
505 |
|
file->size = grub_le_to_cpu32 (data->inode->size); |
506 |
file->data = data; |
file->data = data; |
507 |
file->offset = 0; |
file->offset = 0; |
508 |
|
|
509 |
return 0; |
return 0; |
510 |
|
|
511 |
fail: |
fail: |
|
|
|
512 |
grub_free (data); |
grub_free (data); |
513 |
|
if (fdiro != &data->diropen) |
514 |
|
grub_free (fdiro); |
515 |
|
|
516 |
#ifndef GRUB_UTIL |
#ifndef GRUB_UTIL |
517 |
grub_dl_unref (my_mod); |
grub_dl_unref (my_mod); |
518 |
#endif |
#endif |
539 |
struct grub_ext2_data *data = |
struct grub_ext2_data *data = |
540 |
(struct grub_ext2_data *) file->data; |
(struct grub_ext2_data *) file->data; |
541 |
|
|
542 |
return grub_ext2_read_file (data, file->read_hook, file->offset, len, buf); |
return grub_ext2_read_file (&data->diropen, file->read_hook, |
543 |
|
file->offset, len, buf); |
544 |
} |
} |
545 |
|
|
546 |
|
|
549 |
int (*hook) (const char *filename, int dir)) |
int (*hook) (const char *filename, int dir)) |
550 |
{ |
{ |
551 |
struct grub_ext2_data *data = 0;; |
struct grub_ext2_data *data = 0;; |
552 |
|
struct grub_fshelp_node *fdiro = 0; |
|
int ino; |
|
|
unsigned int fpos = 0; |
|
553 |
|
|
554 |
|
auto int NESTED_FUNC_ATTR iterate (const char *filename, |
555 |
|
enum grub_fshelp_filetype filetype, |
556 |
|
grub_fshelp_node_t node); |
557 |
|
|
558 |
|
int NESTED_FUNC_ATTR iterate (const char *filename, |
559 |
|
enum grub_fshelp_filetype filetype, |
560 |
|
grub_fshelp_node_t node) |
561 |
|
{ |
562 |
|
grub_free (node); |
563 |
|
|
564 |
|
if (filetype == GRUB_FSHELP_DIR) |
565 |
|
return hook (filename, 1); |
566 |
|
else |
567 |
|
return hook (filename, 0); |
568 |
|
|
569 |
|
return 0; |
570 |
|
} |
571 |
|
|
572 |
#ifndef GRUB_UTIL |
#ifndef GRUB_UTIL |
573 |
grub_dl_ref (my_mod); |
grub_dl_ref (my_mod); |
574 |
#endif |
#endif |
576 |
data = grub_ext2_mount (device->disk); |
data = grub_ext2_mount (device->disk); |
577 |
if (!data) |
if (!data) |
578 |
goto fail; |
goto fail; |
579 |
|
|
580 |
grub_ext2_find_file (data, (char *) path, &ino); |
grub_fshelp_find_file (path, &data->diropen, &fdiro, grub_ext2_iterate_dir, |
581 |
if (grub_errno) |
grub_ext2_read_symlink, GRUB_FSHELP_DIR); |
|
goto fail; |
|
|
|
|
|
grub_ext2_read_inode (data, ino, &data->inode); |
|
582 |
if (grub_errno) |
if (grub_errno) |
583 |
goto fail; |
return grub_errno; |
584 |
|
|
585 |
if ((grub_le_to_cpu16 (data->inode.mode) |
grub_ext2_iterate_dir (fdiro, iterate); |
586 |
& FILETYPE_INO_MASK) != FILETYPE_INO_DIRECTORY) |
|
|
{ |
|
|
grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory"); |
|
|
goto fail; |
|
|
} |
|
|
|
|
|
/* Search the file. */ |
|
|
while (fpos < grub_le_to_cpu32 (data->inode.size)) |
|
|
{ |
|
|
struct ext2_dirent dirent; |
|
|
|
|
|
grub_ext2_read_file (data, 0, fpos, sizeof (struct ext2_dirent), |
|
|
(char *) &dirent); |
|
|
if (grub_errno) |
|
|
goto fail; |
|
|
|
|
|
if (dirent.namelen != 0) |
|
|
{ |
|
|
char filename[dirent.namelen + 1]; |
|
|
|
|
|
grub_ext2_read_file (data, 0, fpos + sizeof (struct ext2_dirent), |
|
|
dirent.namelen, filename); |
|
|
if (grub_errno) |
|
|
goto fail; |
|
|
|
|
|
filename[dirent.namelen] = '\0'; |
|
|
|
|
|
if (dirent.filetype != FILETYPE_UNKNOWN) |
|
|
hook (filename, dirent.filetype == FILETYPE_DIRECTORY); |
|
|
else |
|
|
{ |
|
|
struct grub_ext2_inode inode; |
|
|
grub_ext2_read_inode (data, grub_le_to_cpu32 (dirent.inode), &inode); |
|
|
|
|
|
hook (filename, (grub_le_to_cpu16 (inode.mode) |
|
|
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY); |
|
|
} |
|
|
} |
|
|
|
|
|
fpos += grub_le_to_cpu16 (dirent.direntlen); |
|
|
} |
|
|
|
|
587 |
fail: |
fail: |
|
|
|
588 |
grub_free (data); |
grub_free (data); |
589 |
|
if (fdiro != &data->diropen) |
590 |
|
grub_free (fdiro); |
591 |
|
|
592 |
#ifndef GRUB_UTIL |
#ifndef GRUB_UTIL |
593 |
grub_dl_unref (my_mod); |
grub_dl_unref (my_mod); |