2 * This file is part of UBIFS.
4 * Copyright (C) 2006-2008 Nokia Corporation.
6 * (C) Copyright 2008-2009
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published by
11 * the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * You should have received a copy of the GNU General Public License along with
19 * this program; if not, write to the Free Software Foundation, Inc., 51
20 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * Authors: Artem Bityutskiy (Битюцкий Артём)
27 #include <u-boot/zlib.h>
29 #if !defined(CONFIG_SYS_64BIT_VSPRINTF)
30 #warning Please define CONFIG_SYS_64BIT_VSPRINTF for correct output!
33 DECLARE_GLOBAL_DATA_PTR;
38 * We need a wrapper for zunzip() because the parameters are
39 * incompatible with the lzo decompressor.
41 static int gzip_decompress(const unsigned char *in, size_t in_len,
42 unsigned char *out, size_t *out_len)
44 unsigned long len = in_len;
45 return zunzip(out, *out_len, (unsigned char *)in, &len, 0, 0);
48 /* Fake description object for the "none" compressor */
49 static struct ubifs_compressor none_compr = {
50 .compr_type = UBIFS_COMPR_NONE,
51 .name = "no compression",
56 static struct ubifs_compressor lzo_compr = {
57 .compr_type = UBIFS_COMPR_LZO,
60 .decompress = lzo1x_decompress_safe,
63 static struct ubifs_compressor zlib_compr = {
64 .compr_type = UBIFS_COMPR_ZLIB,
66 .capi_name = "deflate",
67 .decompress = gzip_decompress,
70 /* All UBIFS compressors */
71 struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
74 * ubifs_decompress - decompress data.
75 * @in_buf: data to decompress
76 * @in_len: length of the data to decompress
77 * @out_buf: output buffer where decompressed data should
78 * @out_len: output length is returned here
79 * @compr_type: type of compression
81 * This function decompresses data from buffer @in_buf into buffer @out_buf.
82 * The length of the uncompressed data is returned in @out_len. This functions
83 * returns %0 on success or a negative error code on failure.
85 int ubifs_decompress(const void *in_buf, int in_len, void *out_buf,
86 int *out_len, int compr_type)
89 struct ubifs_compressor *compr;
91 if (unlikely(compr_type < 0 || compr_type >= UBIFS_COMPR_TYPES_CNT)) {
92 ubifs_err("invalid compression type %d", compr_type);
96 compr = ubifs_compressors[compr_type];
98 if (unlikely(!compr->capi_name)) {
99 ubifs_err("%s compression is not compiled in", compr->name);
103 if (compr_type == UBIFS_COMPR_NONE) {
104 memcpy(out_buf, in_buf, in_len);
109 err = compr->decompress(in_buf, in_len, out_buf, (size_t *)out_len);
111 ubifs_err("cannot decompress %d bytes, compressor %s, "
112 "error %d", in_len, compr->name, err);
118 * compr_init - initialize a compressor.
119 * @compr: compressor description object
121 * This function initializes the requested compressor and returns zero in case
122 * of success or a negative error code in case of failure.
124 static int __init compr_init(struct ubifs_compressor *compr)
126 ubifs_compressors[compr->compr_type] = compr;
128 #ifndef CONFIG_RELOC_FIXUP_WORKS
129 ubifs_compressors[compr->compr_type]->name += gd->reloc_off;
130 ubifs_compressors[compr->compr_type]->capi_name += gd->reloc_off;
131 ubifs_compressors[compr->compr_type]->decompress += gd->reloc_off;
138 * ubifs_compressors_init - initialize UBIFS compressors.
140 * This function initializes the compressor which were compiled in. Returns
141 * zero in case of success and a negative error code in case of failure.
143 int __init ubifs_compressors_init(void)
147 err = compr_init(&lzo_compr);
151 err = compr_init(&zlib_compr);
155 err = compr_init(&none_compr);
166 static int filldir(struct ubifs_info *c, const char *name, int namlen,
167 u64 ino, unsigned int d_type)
173 case UBIFS_ITYPE_REG:
176 case UBIFS_ITYPE_DIR:
179 case UBIFS_ITYPE_LNK:
187 inode = ubifs_iget(c->vfs_sb, ino);
189 printf("%s: Error in ubifs_iget(), ino=%lld ret=%p!\n",
190 __func__, ino, inode);
193 ctime_r((time_t *)&inode->i_mtime, filetime);
194 printf("%9lld %24.24s ", inode->i_size, filetime);
197 printf("%s\n", name);
202 static int ubifs_printdir(struct file *file, void *dirent)
207 struct ubifs_dent_node *dent;
208 struct inode *dir = file->f_path.dentry->d_inode;
209 struct ubifs_info *c = dir->i_sb->s_fs_info;
211 dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, file->f_pos);
213 if (file->f_pos > UBIFS_S_KEY_HASH_MASK || file->f_pos == 2)
215 * The directory was seek'ed to a senseless position or there
216 * are no more entries.
220 if (file->f_pos == 1) {
221 /* Find the first entry in TNC and save it */
222 lowest_dent_key(c, &key, dir->i_ino);
224 dent = ubifs_tnc_next_ent(c, &key, &nm);
230 file->f_pos = key_hash_flash(c, &dent->key);
231 file->private_data = dent;
234 dent = file->private_data;
237 * The directory was seek'ed to and is now readdir'ed.
238 * Find the entry corresponding to @file->f_pos or the
241 dent_key_init_hash(c, &key, dir->i_ino, file->f_pos);
243 dent = ubifs_tnc_next_ent(c, &key, &nm);
248 file->f_pos = key_hash_flash(c, &dent->key);
249 file->private_data = dent;
253 dbg_gen("feed '%s', ino %llu, new f_pos %#x",
254 dent->name, (unsigned long long)le64_to_cpu(dent->inum),
255 key_hash_flash(c, &dent->key));
256 ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum);
258 nm.len = le16_to_cpu(dent->nlen);
259 over = filldir(c, (char *)dent->name, nm.len,
260 le64_to_cpu(dent->inum), dent->type);
264 /* Switch to the next entry */
265 key_read(c, &dent->key, &key);
266 nm.name = (char *)dent->name;
267 dent = ubifs_tnc_next_ent(c, &key, &nm);
273 kfree(file->private_data);
274 file->f_pos = key_hash_flash(c, &dent->key);
275 file->private_data = dent;
280 if (err != -ENOENT) {
281 ubifs_err("cannot find next direntry, error %d", err);
285 kfree(file->private_data);
286 file->private_data = NULL;
291 static int ubifs_finddir(struct super_block *sb, char *dirname,
292 unsigned long root_inum, unsigned long *inum)
297 struct ubifs_dent_node *dent;
298 struct ubifs_info *c;
300 struct dentry *dentry;
303 file = kzalloc(sizeof(struct file), 0);
304 dentry = kzalloc(sizeof(struct dentry), 0);
305 dir = kzalloc(sizeof(struct inode), 0);
306 if (!file || !dentry || !dir) {
307 printf("%s: Error, no memory for malloc!\n", __func__);
313 file->f_path.dentry = dentry;
314 file->f_path.dentry->d_parent = dentry;
315 file->f_path.dentry->d_inode = dir;
316 file->f_path.dentry->d_inode->i_ino = root_inum;
319 dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, file->f_pos);
321 /* Find the first entry in TNC and save it */
322 lowest_dent_key(c, &key, dir->i_ino);
324 dent = ubifs_tnc_next_ent(c, &key, &nm);
330 file->f_pos = key_hash_flash(c, &dent->key);
331 file->private_data = dent;
334 dbg_gen("feed '%s', ino %llu, new f_pos %#x",
335 dent->name, (unsigned long long)le64_to_cpu(dent->inum),
336 key_hash_flash(c, &dent->key));
337 ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum);
339 nm.len = le16_to_cpu(dent->nlen);
340 if ((strncmp(dirname, (char *)dent->name, nm.len) == 0) &&
341 (strlen(dirname) == nm.len)) {
342 *inum = le64_to_cpu(dent->inum);
346 /* Switch to the next entry */
347 key_read(c, &dent->key, &key);
348 nm.name = (char *)dent->name;
349 dent = ubifs_tnc_next_ent(c, &key, &nm);
355 kfree(file->private_data);
356 file->f_pos = key_hash_flash(c, &dent->key);
357 file->private_data = dent;
362 if (err != -ENOENT) {
363 ubifs_err("cannot find next direntry, error %d", err);
374 if (file->private_data)
375 kfree(file->private_data);
376 file->private_data = NULL;
381 static unsigned long ubifs_findfile(struct super_block *sb, char *filename)
386 char symlinkpath[128];
388 unsigned long root_inum = 1;
390 int symlink_count = 0; /* Don't allow symlink recursion */
392 strcpy(fpath, filename);
394 /* Remove all leading slashes */
399 * Handle root-direcoty ('/')
402 if (!name || *name == '\0')
407 struct ubifs_inode *ui;
409 /* Extract the actual part from the pathname. */
410 next = strchr(name, '/');
412 /* Remove all leading slashes. */
417 ret = ubifs_finddir(sb, name, root_inum, &inum);
420 inode = ubifs_iget(sb, inum);
424 ui = ubifs_inode(inode);
426 if ((inode->i_mode & S_IFMT) == S_IFLNK) {
430 /* We have some sort of symlink recursion, bail out */
431 if (symlink_count++ > 8) {
432 printf("Symlink recursion, aborting\n");
435 memcpy(link_name, ui->data, ui->data_len);
436 link_name[ui->data_len] = '\0';
438 if (link_name[0] == '/') {
439 /* Absolute path, redo everything without
440 * the leading slash */
441 next = name = link_name + 1;
445 /* Relative to cur dir */
446 sprintf(buf, "%s/%s",
447 link_name, next == NULL ? "" : next);
448 memcpy(symlinkpath, buf, sizeof(buf));
449 next = name = symlinkpath;
454 * Check if directory with this name exists
457 /* Found the node! */
458 if (!next || *next == '\0')
468 int ubifs_ls(char *filename)
470 struct ubifs_info *c = ubifs_sb->s_fs_info;
472 struct dentry *dentry;
478 c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
479 inum = ubifs_findfile(ubifs_sb, filename);
485 file = kzalloc(sizeof(struct file), 0);
486 dentry = kzalloc(sizeof(struct dentry), 0);
487 dir = kzalloc(sizeof(struct inode), 0);
488 if (!file || !dentry || !dir) {
489 printf("%s: Error, no memory for malloc!\n", __func__);
494 dir->i_sb = ubifs_sb;
495 file->f_path.dentry = dentry;
496 file->f_path.dentry->d_parent = dentry;
497 file->f_path.dentry->d_inode = dir;
498 file->f_path.dentry->d_inode->i_ino = inum;
500 file->private_data = NULL;
501 ubifs_printdir(file, dirent);
512 ubi_close_volume(c->ubi);
522 static inline void *kmap(struct page *page)
527 static int read_block(struct inode *inode, void *addr, unsigned int block,
528 struct ubifs_data_node *dn)
530 struct ubifs_info *c = inode->i_sb->s_fs_info;
531 int err, len, out_len;
535 data_key_init(c, &key, inode->i_ino, block);
536 err = ubifs_tnc_lookup(c, &key, dn);
539 /* Not found, so it must be a hole */
540 memset(addr, 0, UBIFS_BLOCK_SIZE);
544 ubifs_assert(le64_to_cpu(dn->ch.sqnum) > ubifs_inode(inode)->creat_sqnum);
546 len = le32_to_cpu(dn->size);
547 if (len <= 0 || len > UBIFS_BLOCK_SIZE)
550 dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ;
551 out_len = UBIFS_BLOCK_SIZE;
552 err = ubifs_decompress(&dn->data, dlen, addr, &out_len,
553 le16_to_cpu(dn->compr_type));
554 if (err || len != out_len)
558 * Data length can be less than a full block, even for blocks that are
559 * not the last in the file (e.g., as a result of making a hole and
560 * appending data). Ensure that the remainder is zeroed out.
562 if (len < UBIFS_BLOCK_SIZE)
563 memset(addr + len, 0, UBIFS_BLOCK_SIZE - len);
568 ubifs_err("bad data node (block %u, inode %lu)",
569 block, inode->i_ino);
570 dbg_dump_node(c, dn);
574 static int do_readpage(struct ubifs_info *c, struct inode *inode, struct page *page)
578 unsigned int block, beyond;
579 struct ubifs_data_node *dn;
580 loff_t i_size = inode->i_size;
582 dbg_gen("ino %lu, pg %lu, i_size %lld",
583 inode->i_ino, page->index, i_size);
587 block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT;
588 beyond = (i_size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
589 if (block >= beyond) {
590 /* Reading beyond inode */
591 memset(addr, 0, PAGE_CACHE_SIZE);
595 dn = kmalloc(UBIFS_MAX_DATA_NODE_SZ, GFP_NOFS);
603 if (block >= beyond) {
604 /* Reading beyond inode */
606 memset(addr, 0, UBIFS_BLOCK_SIZE);
608 ret = read_block(inode, addr, block, dn);
613 } else if (block + 1 == beyond) {
614 int dlen = le32_to_cpu(dn->size);
615 int ilen = i_size & (UBIFS_BLOCK_SIZE - 1);
617 if (ilen && ilen < dlen)
618 memset(addr + ilen, 0, dlen - ilen);
621 if (++i >= UBIFS_BLOCKS_PER_PAGE)
624 addr += UBIFS_BLOCK_SIZE;
627 if (err == -ENOENT) {
628 /* Not found, so it must be a hole */
632 ubifs_err("cannot read page %lu of inode %lu, error %d",
633 page->index, inode->i_ino, err);
647 int ubifs_load(char *filename, u32 addr, u32 size)
649 struct ubifs_info *c = ubifs_sb->s_fs_info;
657 c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
658 /* ubifs_findfile will resolve symlinks, so we know that we get
659 * the real file here */
660 inum = ubifs_findfile(ubifs_sb, filename);
669 inode = ubifs_iget(ubifs_sb, inum);
671 printf("%s: Error reading inode %ld!\n", __func__, inum);
672 err = PTR_ERR(inode);
677 * If no size was specified or if size bigger than filesize
678 * set size to filesize
680 if ((size == 0) || (size > inode->i_size))
681 size = inode->i_size;
683 count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
684 printf("Loading file '%s' to addr 0x%08x with size %d (0x%08x)...\n",
685 filename, addr, size, size);
687 page.addr = (void *)addr;
690 for (i = 0; i < count; i++) {
691 err = do_readpage(c, inode, &page);
695 page.addr += PAGE_SIZE;
700 printf("Error reading file '%s'\n", filename);
707 ubi_close_volume(c->ubi);