2 * This file is part of UBIFS.
4 * Copyright (C) 2006-2008 Nokia Corporation.
6 * (C) Copyright 2008-2010
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)
29 #include <u-boot/zlib.h>
31 #include <linux/err.h>
32 #include <linux/lzo.h>
34 DECLARE_GLOBAL_DATA_PTR;
39 * We need a wrapper for zunzip() because the parameters are
40 * incompatible with the lzo decompressor.
42 static int gzip_decompress(const unsigned char *in, size_t in_len,
43 unsigned char *out, size_t *out_len)
45 return zunzip(out, *out_len, (unsigned char *)in,
46 (unsigned long *)out_len, 0, 0);
49 /* Fake description object for the "none" compressor */
50 static struct ubifs_compressor none_compr = {
51 .compr_type = UBIFS_COMPR_NONE,
57 static struct ubifs_compressor lzo_compr = {
58 .compr_type = UBIFS_COMPR_LZO,
60 .comp_mutex = &lzo_mutex,
64 .decompress = lzo1x_decompress_safe,
67 static struct ubifs_compressor zlib_compr = {
68 .compr_type = UBIFS_COMPR_ZLIB,
70 .comp_mutex = &deflate_mutex,
71 .decomp_mutex = &inflate_mutex,
74 .capi_name = "deflate",
75 .decompress = gzip_decompress,
78 /* All UBIFS compressors */
79 struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
86 * kmemdup - duplicate region of memory
88 * @src: memory region to duplicate
89 * @len: memory region length
90 * @gfp: GFP mask to use
92 void *kmemdup(const void *src, size_t len, gfp_t gfp)
96 p = kmalloc(len, gfp);
106 static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name,
109 struct ubifs_compressor *comp;
110 struct crypto_comp *ptr;
113 ptr = malloc_cache_aligned(sizeof(struct crypto_comp));
114 while (i < UBIFS_COMPR_TYPES_CNT) {
115 comp = ubifs_compressors[i];
120 if (strncmp(alg_name, comp->capi_name, strlen(alg_name)) == 0) {
126 if (i >= UBIFS_COMPR_TYPES_CNT) {
127 ubifs_err("invalid compression type %s", alg_name);
133 static inline int crypto_comp_decompress(struct crypto_comp *tfm,
134 const u8 *src, unsigned int slen,
135 u8 *dst, unsigned int *dlen)
137 struct ubifs_compressor *compr = ubifs_compressors[tfm->compressor];
140 if (compr->compr_type == UBIFS_COMPR_NONE) {
141 memcpy(dst, src, slen);
146 err = compr->decompress(src, slen, dst, (size_t *)dlen);
148 ubifs_err("cannot decompress %d bytes, compressor %s, "
149 "error %d", slen, compr->name, err);
156 /* from shrinker.c */
158 /* Global clean znode counter (for all mounted UBIFS instances) */
159 atomic_long_t ubifs_clean_zn_cnt;
164 * ubifs_decompress - decompress data.
165 * @in_buf: data to decompress
166 * @in_len: length of the data to decompress
167 * @out_buf: output buffer where decompressed data should
168 * @out_len: output length is returned here
169 * @compr_type: type of compression
171 * This function decompresses data from buffer @in_buf into buffer @out_buf.
172 * The length of the uncompressed data is returned in @out_len. This functions
173 * returns %0 on success or a negative error code on failure.
175 int ubifs_decompress(const void *in_buf, int in_len, void *out_buf,
176 int *out_len, int compr_type)
179 struct ubifs_compressor *compr;
181 if (unlikely(compr_type < 0 || compr_type >= UBIFS_COMPR_TYPES_CNT)) {
182 ubifs_err("invalid compression type %d", compr_type);
186 compr = ubifs_compressors[compr_type];
188 if (unlikely(!compr->capi_name)) {
189 ubifs_err("%s compression is not compiled in", compr->name);
193 if (compr_type == UBIFS_COMPR_NONE) {
194 memcpy(out_buf, in_buf, in_len);
199 if (compr->decomp_mutex)
200 mutex_lock(compr->decomp_mutex);
201 err = crypto_comp_decompress(compr->cc, in_buf, in_len, out_buf,
202 (unsigned int *)out_len);
203 if (compr->decomp_mutex)
204 mutex_unlock(compr->decomp_mutex);
206 ubifs_err("cannot decompress %d bytes, compressor %s, error %d",
207 in_len, compr->name, err);
213 * compr_init - initialize a compressor.
214 * @compr: compressor description object
216 * This function initializes the requested compressor and returns zero in case
217 * of success or a negative error code in case of failure.
219 static int __init compr_init(struct ubifs_compressor *compr)
221 ubifs_compressors[compr->compr_type] = compr;
223 #ifdef CONFIG_NEEDS_MANUAL_RELOC
224 ubifs_compressors[compr->compr_type]->name += gd->reloc_off;
225 ubifs_compressors[compr->compr_type]->capi_name += gd->reloc_off;
226 ubifs_compressors[compr->compr_type]->decompress += gd->reloc_off;
229 if (compr->capi_name) {
230 compr->cc = crypto_alloc_comp(compr->capi_name, 0, 0);
231 if (IS_ERR(compr->cc)) {
232 ubifs_err("cannot initialize compressor %s, error %ld",
233 compr->name, PTR_ERR(compr->cc));
234 return PTR_ERR(compr->cc);
242 * ubifs_compressors_init - initialize UBIFS compressors.
244 * This function initializes the compressor which were compiled in. Returns
245 * zero in case of success and a negative error code in case of failure.
247 int __init ubifs_compressors_init(void)
251 err = compr_init(&lzo_compr);
255 err = compr_init(&zlib_compr);
259 err = compr_init(&none_compr);
270 static int filldir(struct ubifs_info *c, const char *name, int namlen,
271 u64 ino, unsigned int d_type)
277 case UBIFS_ITYPE_REG:
280 case UBIFS_ITYPE_DIR:
283 case UBIFS_ITYPE_LNK:
291 inode = ubifs_iget(c->vfs_sb, ino);
293 printf("%s: Error in ubifs_iget(), ino=%lld ret=%p!\n",
294 __func__, ino, inode);
297 ctime_r((time_t *)&inode->i_mtime, filetime);
298 printf("%9lld %24.24s ", inode->i_size, filetime);
303 printf("%s\n", name);
308 static int ubifs_printdir(struct file *file, void *dirent)
313 struct ubifs_dent_node *dent;
314 struct inode *dir = file->f_path.dentry->d_inode;
315 struct ubifs_info *c = dir->i_sb->s_fs_info;
317 dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, file->f_pos);
319 if (file->f_pos > UBIFS_S_KEY_HASH_MASK || file->f_pos == 2)
321 * The directory was seek'ed to a senseless position or there
322 * are no more entries.
326 if (file->f_pos == 1) {
327 /* Find the first entry in TNC and save it */
328 lowest_dent_key(c, &key, dir->i_ino);
330 dent = ubifs_tnc_next_ent(c, &key, &nm);
336 file->f_pos = key_hash_flash(c, &dent->key);
337 file->private_data = dent;
340 dent = file->private_data;
343 * The directory was seek'ed to and is now readdir'ed.
344 * Find the entry corresponding to @file->f_pos or the
347 dent_key_init_hash(c, &key, dir->i_ino, file->f_pos);
349 dent = ubifs_tnc_next_ent(c, &key, &nm);
354 file->f_pos = key_hash_flash(c, &dent->key);
355 file->private_data = dent;
359 dbg_gen("feed '%s', ino %llu, new f_pos %#x",
360 dent->name, (unsigned long long)le64_to_cpu(dent->inum),
361 key_hash_flash(c, &dent->key));
362 ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum);
364 nm.len = le16_to_cpu(dent->nlen);
365 over = filldir(c, (char *)dent->name, nm.len,
366 le64_to_cpu(dent->inum), dent->type);
370 /* Switch to the next entry */
371 key_read(c, &dent->key, &key);
372 nm.name = (char *)dent->name;
373 dent = ubifs_tnc_next_ent(c, &key, &nm);
379 kfree(file->private_data);
380 file->f_pos = key_hash_flash(c, &dent->key);
381 file->private_data = dent;
386 if (err != -ENOENT) {
387 ubifs_err("cannot find next direntry, error %d", err);
391 kfree(file->private_data);
392 file->private_data = NULL;
397 static int ubifs_finddir(struct super_block *sb, char *dirname,
398 unsigned long root_inum, unsigned long *inum)
403 struct ubifs_dent_node *dent;
404 struct ubifs_info *c;
406 struct dentry *dentry;
410 file = kzalloc(sizeof(struct file), 0);
411 dentry = kzalloc(sizeof(struct dentry), 0);
412 dir = kzalloc(sizeof(struct inode), 0);
413 if (!file || !dentry || !dir) {
414 printf("%s: Error, no memory for malloc!\n", __func__);
420 file->f_path.dentry = dentry;
421 file->f_path.dentry->d_parent = dentry;
422 file->f_path.dentry->d_inode = dir;
423 file->f_path.dentry->d_inode->i_ino = root_inum;
426 dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, file->f_pos);
428 /* Find the first entry in TNC and save it */
429 lowest_dent_key(c, &key, dir->i_ino);
431 dent = ubifs_tnc_next_ent(c, &key, &nm);
437 file->f_pos = key_hash_flash(c, &dent->key);
438 file->private_data = dent;
441 dbg_gen("feed '%s', ino %llu, new f_pos %#x",
442 dent->name, (unsigned long long)le64_to_cpu(dent->inum),
443 key_hash_flash(c, &dent->key));
444 ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum);
446 nm.len = le16_to_cpu(dent->nlen);
447 if ((strncmp(dirname, (char *)dent->name, nm.len) == 0) &&
448 (strlen(dirname) == nm.len)) {
449 *inum = le64_to_cpu(dent->inum);
454 /* Switch to the next entry */
455 key_read(c, &dent->key, &key);
456 nm.name = (char *)dent->name;
457 dent = ubifs_tnc_next_ent(c, &key, &nm);
463 kfree(file->private_data);
464 file->f_pos = key_hash_flash(c, &dent->key);
465 file->private_data = dent;
471 ubifs_err("cannot find next direntry, error %d", err);
474 if (file->private_data)
475 kfree(file->private_data);
486 static unsigned long ubifs_findfile(struct super_block *sb, char *filename)
491 char symlinkpath[128];
493 unsigned long root_inum = 1;
495 int symlink_count = 0; /* Don't allow symlink recursion */
498 strcpy(fpath, filename);
500 /* Remove all leading slashes */
505 * Handle root-direcoty ('/')
508 if (!name || *name == '\0')
513 struct ubifs_inode *ui;
515 /* Extract the actual part from the pathname. */
516 next = strchr(name, '/');
518 /* Remove all leading slashes. */
523 ret = ubifs_finddir(sb, name, root_inum, &inum);
526 inode = ubifs_iget(sb, inum);
530 ui = ubifs_inode(inode);
532 if ((inode->i_mode & S_IFMT) == S_IFLNK) {
535 /* We have some sort of symlink recursion, bail out */
536 if (symlink_count++ > 8) {
537 printf("Symlink recursion, aborting\n");
540 memcpy(link_name, ui->data, ui->data_len);
541 link_name[ui->data_len] = '\0';
543 if (link_name[0] == '/') {
544 /* Absolute path, redo everything without
545 * the leading slash */
546 next = name = link_name + 1;
550 /* Relative to cur dir */
551 sprintf(buf, "%s/%s",
552 link_name, next == NULL ? "" : next);
553 memcpy(symlinkpath, buf, sizeof(buf));
554 next = name = symlinkpath;
559 * Check if directory with this name exists
562 /* Found the node! */
563 if (!next || *next == '\0')
573 int ubifs_ls(char *filename)
575 struct ubifs_info *c = ubifs_sb->s_fs_info;
577 struct dentry *dentry;
583 c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
584 inum = ubifs_findfile(ubifs_sb, filename);
590 file = kzalloc(sizeof(struct file), 0);
591 dentry = kzalloc(sizeof(struct dentry), 0);
592 dir = kzalloc(sizeof(struct inode), 0);
593 if (!file || !dentry || !dir) {
594 printf("%s: Error, no memory for malloc!\n", __func__);
599 dir->i_sb = ubifs_sb;
600 file->f_path.dentry = dentry;
601 file->f_path.dentry->d_parent = dentry;
602 file->f_path.dentry->d_inode = dir;
603 file->f_path.dentry->d_inode->i_ino = inum;
605 file->private_data = NULL;
606 ubifs_printdir(file, dirent);
617 ubi_close_volume(c->ubi);
627 static inline void *kmap(struct page *page)
632 static int read_block(struct inode *inode, void *addr, unsigned int block,
633 struct ubifs_data_node *dn)
635 struct ubifs_info *c = inode->i_sb->s_fs_info;
636 int err, len, out_len;
640 data_key_init(c, &key, inode->i_ino, block);
641 err = ubifs_tnc_lookup(c, &key, dn);
644 /* Not found, so it must be a hole */
645 memset(addr, 0, UBIFS_BLOCK_SIZE);
649 ubifs_assert(le64_to_cpu(dn->ch.sqnum) > ubifs_inode(inode)->creat_sqnum);
651 len = le32_to_cpu(dn->size);
652 if (len <= 0 || len > UBIFS_BLOCK_SIZE)
655 dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ;
656 out_len = UBIFS_BLOCK_SIZE;
657 err = ubifs_decompress(&dn->data, dlen, addr, &out_len,
658 le16_to_cpu(dn->compr_type));
659 if (err || len != out_len)
663 * Data length can be less than a full block, even for blocks that are
664 * not the last in the file (e.g., as a result of making a hole and
665 * appending data). Ensure that the remainder is zeroed out.
667 if (len < UBIFS_BLOCK_SIZE)
668 memset(addr + len, 0, UBIFS_BLOCK_SIZE - len);
673 ubifs_err("bad data node (block %u, inode %lu)",
674 block, inode->i_ino);
675 ubifs_dump_node(c, dn);
679 static int do_readpage(struct ubifs_info *c, struct inode *inode,
680 struct page *page, int last_block_size)
684 unsigned int block, beyond;
685 struct ubifs_data_node *dn;
686 loff_t i_size = inode->i_size;
688 dbg_gen("ino %lu, pg %lu, i_size %lld",
689 inode->i_ino, page->index, i_size);
693 block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT;
694 beyond = (i_size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
695 if (block >= beyond) {
696 /* Reading beyond inode */
697 memset(addr, 0, PAGE_CACHE_SIZE);
701 dn = kmalloc(UBIFS_MAX_DATA_NODE_SZ, GFP_NOFS);
709 if (block >= beyond) {
710 /* Reading beyond inode */
712 memset(addr, 0, UBIFS_BLOCK_SIZE);
715 * Reading last block? Make sure to not write beyond
716 * the requested size in the destination buffer.
718 if (((block + 1) == beyond) || last_block_size) {
723 * We need to buffer the data locally for the
724 * last block. This is to not pad the
725 * destination area to a multiple of
728 buff = malloc_cache_aligned(UBIFS_BLOCK_SIZE);
730 printf("%s: Error, malloc fails!\n",
736 /* Read block-size into temp buffer */
737 ret = read_block(inode, buff, block, dn);
740 if (err != -ENOENT) {
747 dlen = last_block_size;
749 dlen = le32_to_cpu(dn->size);
751 /* Now copy required size back to dest */
752 memcpy(addr, buff, dlen);
756 ret = read_block(inode, addr, block, dn);
764 if (++i >= UBIFS_BLOCKS_PER_PAGE)
767 addr += UBIFS_BLOCK_SIZE;
770 if (err == -ENOENT) {
771 /* Not found, so it must be a hole */
775 ubifs_err("cannot read page %lu of inode %lu, error %d",
776 page->index, inode->i_ino, err);
790 int ubifs_load(char *filename, u32 addr, u32 size)
792 struct ubifs_info *c = ubifs_sb->s_fs_info;
799 int last_block_size = 0;
801 c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
802 /* ubifs_findfile will resolve symlinks, so we know that we get
803 * the real file here */
804 inum = ubifs_findfile(ubifs_sb, filename);
813 inode = ubifs_iget(ubifs_sb, inum);
815 printf("%s: Error reading inode %ld!\n", __func__, inum);
816 err = PTR_ERR(inode);
821 * If no size was specified or if size bigger than filesize
822 * set size to filesize
824 if ((size == 0) || (size > inode->i_size))
825 size = inode->i_size;
827 count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
828 printf("Loading file '%s' to addr 0x%08x with size %d (0x%08x)...\n",
829 filename, addr, size, size);
831 page.addr = (void *)addr;
834 for (i = 0; i < count; i++) {
836 * Make sure to not read beyond the requested size
838 if (((i + 1) == count) && (size < inode->i_size))
839 last_block_size = size - (i * PAGE_SIZE);
841 err = do_readpage(c, inode, &page, last_block_size);
845 page.addr += PAGE_SIZE;
850 printf("Error reading file '%s'\n", filename);
852 setenv_hex("filesize", size);
859 ubi_close_volume(c->ubi);