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9a5467d5 | 1 | diff --new-file -ur linux-2.6.1/fs/Kconfig linux-2.6.1-squashfs1.3r3/fs/Kconfig |
2 | --- linux-2.6.1/fs/Kconfig 2004-01-09 06:59:44.000000000 +0000 | |
3 | +++ linux-2.6.1-squashfs1.3r3/fs/Kconfig 2004-01-17 23:44:35.000000000 +0000 | |
4 | @@ -1118,6 +1118,29 @@ | |
5 | ||
6 | If unsure, say N. | |
7 | ||
8 | +config SQUASHFS | |
9 | + tristate "SquashFS - Squashed file system support" | |
10 | + select ZLIB_INFLATE | |
11 | + help | |
12 | + Saying Y here includes support for SquashFs (Compressed Read-Only File | |
13 | + System). Squashfs is a highly compressed read-only filesystem for Linux. | |
14 | + It uses zlib compression to compress both files, inodes and directories. | |
15 | + Inodes in the system are very small and all blocks are packed to minimise | |
16 | + data overhead. Block sizes greater than 4K are supported up to a maximum of 32K. | |
17 | + | |
18 | + Squashfs is intended for general read-only filesystem use, for archival | |
19 | + use (i.e. in cases where a .tar.gz file may be used), and in embedded | |
20 | + systems where low overhead is needed. Further information and filesystem tools | |
21 | + are available from http://squashfs.sourceforge.net. | |
22 | + | |
23 | + If you want to compile this as a module ( = code which can be | |
24 | + inserted in and removed from the running kernel whenever you want), | |
25 | + say M here and read <file:Documentation/modules.txt>. The module | |
26 | + will be called squashfs. Note that the root file system (the one | |
27 | + containing the directory /) cannot be compiled as a module. | |
28 | + | |
29 | + If unsure, say N. | |
30 | + | |
31 | config VXFS_FS | |
32 | tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)" | |
33 | help | |
34 | diff --new-file -ur linux-2.6.1/fs/Makefile linux-2.6.1-squashfs1.3r3/fs/Makefile | |
35 | --- linux-2.6.1/fs/Makefile 2004-01-09 06:59:44.000000000 +0000 | |
36 | +++ linux-2.6.1-squashfs1.3r3/fs/Makefile 2004-01-17 23:44:35.000000000 +0000 | |
37 | @@ -49,6 +49,7 @@ | |
38 | obj-$(CONFIG_JBD) += jbd/ | |
39 | obj-$(CONFIG_EXT2_FS) += ext2/ | |
40 | obj-$(CONFIG_CRAMFS) += cramfs/ | |
41 | +obj-$(CONFIG_SQUASHFS) += squashfs/ | |
42 | obj-$(CONFIG_RAMFS) += ramfs/ | |
43 | obj-$(CONFIG_HUGETLBFS) += hugetlbfs/ | |
44 | obj-$(CONFIG_CODA_FS) += coda/ | |
45 | diff --new-file -ur linux-2.6.1/fs/squashfs/inode.c linux-2.6.1-squashfs1.3r3/fs/squashfs/inode.c | |
46 | --- linux-2.6.1/fs/squashfs/inode.c 1970-01-01 01:00:00.000000000 +0100 | |
47 | +++ linux-2.6.1-squashfs1.3r3/fs/squashfs/inode.c 2004-01-17 23:47:16.000000000 +0000 | |
48 | @@ -0,0 +1,1071 @@ | |
49 | +/* | |
50 | + * Squashfs - a compressed read only filesystem for Linux | |
51 | + * | |
52 | + * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk> | |
53 | + * | |
54 | + * This program is free software; you can redistribute it and/or | |
55 | + * modify it under the terms of the GNU General Public License | |
56 | + * as published by the Free Software Foundation; either version | |
57 | + * 2 of the License, or (at your option) any later version. | |
58 | + * | |
59 | + * inode.c | |
60 | + */ | |
61 | + | |
62 | +#include <linux/types.h> | |
63 | +#include <linux/squashfs_fs.h> | |
64 | +#include <linux/module.h> | |
65 | +#include <linux/errno.h> | |
66 | +#include <linux/slab.h> | |
67 | +#include <linux/fs.h> | |
68 | +#include <linux/smp_lock.h> | |
69 | +#include <linux/slab.h> | |
70 | +#include <linux/squashfs_fs_sb.h> | |
71 | +#include <linux/squashfs_fs_i.h> | |
72 | +#include <linux/buffer_head.h> | |
73 | +#include <linux/vfs.h> | |
74 | +#include <linux/init.h> | |
75 | +#include <linux/dcache.h> | |
76 | +#include <asm/uaccess.h> | |
77 | +#include <linux/wait.h> | |
78 | +#include <asm/semaphore.h> | |
79 | +#include <linux/zlib.h> | |
80 | +#include <linux/blkdev.h> | |
81 | +#include <linux/vmalloc.h> | |
82 | + | |
83 | +#ifdef SQUASHFS_TRACE | |
84 | +#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args) | |
85 | +#else | |
86 | +#define TRACE(s, args...) {} | |
87 | +#endif | |
88 | + | |
89 | +#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args) | |
90 | + | |
91 | +#define SERROR(s, args...) if(!silent) printk(KERN_ERR "SQUASHFS error: "s, ## args) | |
92 | +#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args) | |
93 | + | |
94 | +static void squashfs_put_super(struct super_block *); | |
95 | +static int squashfs_statfs(struct super_block *, struct kstatfs *); | |
96 | +static int squashfs_symlink_readpage(struct file *file, struct page *page); | |
97 | +static int squashfs_readpage(struct file *file, struct page *page); | |
98 | +static int squashfs_readdir(struct file *, void *, filldir_t); | |
99 | +static struct dentry *squashfs_lookup(struct inode *, struct dentry *, struct nameidata *); | |
100 | +static unsigned int read_data(struct super_block *s, char *buffer, | |
101 | + unsigned int index, int length, unsigned int *next_index); | |
102 | +static int squashfs_get_cached_block(struct super_block *s, char *buffer, | |
103 | + unsigned int block, unsigned int offset, int length, | |
104 | + unsigned int *next_block, unsigned int *next_offset); | |
105 | +static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode); | |
106 | +static void squashfs_put_super(struct super_block *s); | |
107 | +static struct super_block *squashfs_get_sb(struct file_system_type *, int, const char *, void *); | |
108 | +static struct inode *squashfs_alloc_inode(struct super_block *sb); | |
109 | +static void squashfs_destroy_inode(struct inode *inode); | |
110 | +static int init_inodecache(void); | |
111 | +static void destroy_inodecache(void); | |
112 | + | |
113 | +DECLARE_MUTEX(read_data_mutex); | |
114 | + | |
115 | +static z_stream stream; | |
116 | + | |
117 | +static struct file_system_type squashfs_fs_type = { | |
118 | + .owner = THIS_MODULE, | |
119 | + .name = "squashfs", | |
120 | + .get_sb = squashfs_get_sb, | |
121 | + .kill_sb = kill_block_super, | |
122 | + .fs_flags = FS_REQUIRES_DEV | |
123 | + }; | |
124 | + | |
125 | +static unsigned char squashfs_filetype_table[] = { | |
126 | + DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK | |
127 | +}; | |
128 | + | |
129 | +static struct super_operations squashfs_ops = { | |
130 | + .alloc_inode = squashfs_alloc_inode, | |
131 | + .destroy_inode = squashfs_destroy_inode, | |
132 | + .statfs = squashfs_statfs, | |
133 | + .put_super = squashfs_put_super, | |
134 | +}; | |
135 | + | |
136 | +static struct address_space_operations squashfs_symlink_aops = { | |
137 | + .readpage = squashfs_symlink_readpage | |
138 | +}; | |
139 | + | |
140 | +static struct address_space_operations squashfs_aops = { | |
141 | + .readpage = squashfs_readpage | |
142 | +}; | |
143 | + | |
144 | +static struct file_operations squashfs_dir_ops = { | |
145 | + .read = generic_read_dir, | |
146 | + .readdir = squashfs_readdir | |
147 | +}; | |
148 | + | |
149 | +static struct inode_operations squashfs_dir_inode_ops = { | |
150 | + .lookup = squashfs_lookup | |
151 | +}; | |
152 | + | |
153 | + | |
154 | +static inline struct squashfs_inode_info *SQUASHFS_I(struct inode *inode) | |
155 | +{ | |
156 | + return list_entry(inode, struct squashfs_inode_info, vfs_inode); | |
157 | +} | |
158 | + | |
159 | + | |
160 | +static unsigned int read_data(struct super_block *s, char *buffer, | |
161 | + unsigned int index, int length, unsigned int *next_index) | |
162 | +{ | |
163 | + squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info; | |
164 | + struct buffer_head *bh[((SQUASHFS_FILE_MAX_SIZE - 1) >> msBlk->devblksize_log2) + 2]; | |
165 | + unsigned short c_byte; | |
166 | + unsigned int offset = index & ((1 << msBlk->devblksize_log2) - 1); | |
167 | + unsigned int cur_index = index >> msBlk->devblksize_log2; | |
168 | + int bytes, avail_bytes, b, k; | |
169 | + char *c_buffer; | |
170 | + unsigned int compressed; | |
171 | + | |
172 | + if(!(bh[0] = sb_bread(s, cur_index))) | |
173 | + goto read_failure; | |
174 | + | |
175 | + if(length) | |
176 | + c_byte = length; | |
177 | + else { | |
178 | + if(msBlk->devblksize - offset == 1) { | |
179 | + if(msBlk->swap) | |
180 | + ((unsigned char *) &c_byte)[1] = *((unsigned char *) (bh[0]->b_data + offset)); | |
181 | + else | |
182 | + ((unsigned char *) &c_byte)[0] = *((unsigned char *) (bh[0]->b_data + offset)); | |
183 | + brelse(bh[0]); | |
184 | + if(!(bh[0] = sb_bread(s, ++cur_index))) | |
185 | + goto read_failure; | |
186 | + if(msBlk->swap) | |
187 | + ((unsigned char *) &c_byte)[0] = *((unsigned char *) bh[0]->b_data); | |
188 | + else | |
189 | + ((unsigned char *) &c_byte)[1] = *((unsigned char *) bh[0]->b_data); | |
190 | + offset = 1; | |
191 | + } | |
192 | + else { | |
193 | + if(msBlk->swap) { | |
194 | + ((unsigned char *) &c_byte)[1] = *((unsigned char *) (bh[0]->b_data + offset)); | |
195 | + ((unsigned char *) &c_byte)[0] = *((unsigned char *) (bh[0]->b_data + offset + 1)); | |
196 | + } else | |
197 | + c_byte = *((unsigned short *) (bh[0]->b_data + offset)); | |
198 | + offset += 2; | |
199 | + } | |
200 | + if(SQUASHFS_CHECK_DATA(msBlk->sBlk.flags)) { | |
201 | + if(offset == msBlk->devblksize) { | |
202 | + brelse(bh[0]); | |
203 | + if(!(bh[0] = sb_bread(s, ++cur_index))) | |
204 | + goto read_failure; | |
205 | + offset = 0; | |
206 | + } | |
207 | + if(*((unsigned char *) (bh[0]->b_data + offset)) != SQUASHFS_MARKER_BYTE) { | |
208 | + ERROR("Metadata block marker corrupt @ %x\n", index); | |
209 | + brelse(bh[0]); | |
210 | + return 0; | |
211 | + } | |
212 | + offset ++; | |
213 | + } | |
214 | + } | |
215 | + | |
216 | + bytes = msBlk->devblksize - offset; | |
217 | + c_buffer = (compressed = SQUASHFS_COMPRESSED(c_byte)) ? msBlk->read_data : buffer; | |
218 | + c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte); | |
219 | + | |
220 | + TRACE("Block @ 0x%x, %scompressed size %d\n", index, compressed ? "" : "un", (unsigned int) c_byte); | |
221 | + | |
222 | + for(b = 1; bytes < c_byte; b++) { | |
223 | + if(!(bh[b] = sb_bread(s, ++cur_index))) | |
224 | + goto block_release; | |
225 | + bytes += msBlk->devblksize; | |
226 | + } | |
227 | + | |
228 | + if(compressed) | |
229 | + down(&read_data_mutex); | |
230 | + | |
231 | + for(bytes = 0, k = 0; k < b; k++) { | |
232 | + avail_bytes = (c_byte - bytes) > (msBlk->devblksize - offset) ? msBlk->devblksize - offset : c_byte - bytes; | |
233 | + memcpy(c_buffer + bytes, bh[k]->b_data + offset, avail_bytes); | |
234 | + bytes += avail_bytes; | |
235 | + offset = 0; | |
236 | + brelse(bh[k]); | |
237 | + } | |
238 | + | |
239 | + /* | |
240 | + * uncompress block | |
241 | + */ | |
242 | + if(compressed) { | |
243 | + int zlib_err; | |
244 | + | |
245 | + stream.next_in = c_buffer; | |
246 | + stream.avail_in = c_byte; | |
247 | + stream.next_out = buffer; | |
248 | + stream.avail_out = msBlk->read_size; | |
249 | + if(((zlib_err = zlib_inflateInit(&stream)) != Z_OK) || | |
250 | + ((zlib_err = zlib_inflate(&stream, Z_FINISH)) != Z_STREAM_END) || | |
251 | + ((zlib_err = zlib_inflateEnd(&stream)) != Z_OK)) { | |
252 | + ERROR("zlib_fs returned unexpected result 0x%x\n", zlib_err); | |
253 | + bytes = 0; | |
254 | + } else | |
255 | + bytes = stream.total_out; | |
256 | + up(&read_data_mutex); | |
257 | + } | |
258 | + | |
259 | + if(next_index) | |
260 | + *next_index = index + c_byte + (length ? 0 : (SQUASHFS_CHECK_DATA(msBlk->sBlk.flags) ? 3 : 2)); | |
261 | + | |
262 | + return bytes; | |
263 | + | |
264 | +block_release: | |
265 | + while(--b >= 0) brelse(bh[b]); | |
266 | + | |
267 | +read_failure: | |
268 | + ERROR("sb_bread failed reading block 0x%x\n", cur_index); | |
269 | + return 0; | |
270 | +} | |
271 | + | |
272 | + | |
273 | +static int squashfs_get_cached_block(struct super_block *s, char *buffer, | |
274 | + unsigned int block, unsigned int offset, int length, | |
275 | + unsigned int *next_block, unsigned int *next_offset) | |
276 | +{ | |
277 | + squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info; | |
278 | + int n, i, bytes, return_length = length; | |
279 | + unsigned int next_index; | |
280 | + | |
281 | + TRACE("Entered squashfs_get_cached_block [%x:%x]\n", block, offset); | |
282 | + | |
283 | + for(;;) { | |
284 | + for(i = 0; i < SQUASHFS_CACHED_BLKS; i++) | |
285 | + if(msBlk->block_cache[i].block == block) | |
286 | + break; | |
287 | + | |
288 | + down(&msBlk->block_cache_mutex); | |
289 | + if(i == SQUASHFS_CACHED_BLKS) { | |
290 | + /* read inode header block */ | |
291 | + for(i = msBlk->next_cache, n = SQUASHFS_CACHED_BLKS; n ; n --, i = (i + 1) % SQUASHFS_CACHED_BLKS) | |
292 | + if(msBlk->block_cache[i].block != SQUASHFS_USED_BLK) | |
293 | + break; | |
294 | + if(n == 0) { | |
295 | + up(&msBlk->block_cache_mutex); | |
296 | + sleep_on(&msBlk->waitq); | |
297 | + continue; | |
298 | + } | |
299 | + msBlk->next_cache = (i + 1) % SQUASHFS_CACHED_BLKS; | |
300 | + | |
301 | + if(msBlk->block_cache[i].block == SQUASHFS_INVALID_BLK) { | |
302 | + if(!(msBlk->block_cache[i].data = (unsigned char *) | |
303 | + kmalloc(SQUASHFS_METADATA_SIZE, GFP_KERNEL))) { | |
304 | + ERROR("Failed to allocate cache block\n"); | |
305 | + up(&msBlk->block_cache_mutex); | |
306 | + return 0; | |
307 | + } | |
308 | + } | |
309 | + | |
310 | + msBlk->block_cache[i].block = SQUASHFS_USED_BLK; | |
311 | + up(&msBlk->block_cache_mutex); | |
312 | + if(!(msBlk->block_cache[i].length = read_data(s, msBlk->block_cache[i].data, block, 0, | |
313 | + &next_index))) { | |
314 | + ERROR("Unable to read cache block [%x:%x]\n", block, offset); | |
315 | + return 0; | |
316 | + } | |
317 | + down(&msBlk->block_cache_mutex); | |
318 | + wake_up(&msBlk->waitq); | |
319 | + msBlk->block_cache[i].block = block; | |
320 | + msBlk->block_cache[i].next_index = next_index; | |
321 | + TRACE("Read cache block [%x:%x]\n", block, offset); | |
322 | + } | |
323 | + | |
324 | + if(msBlk->block_cache[i].block != block) { | |
325 | + up(&msBlk->block_cache_mutex); | |
326 | + continue; | |
327 | + } | |
328 | + | |
329 | + if((bytes = msBlk->block_cache[i].length - offset) >= length) { | |
330 | + if(buffer) | |
331 | + memcpy(buffer, msBlk->block_cache[i].data + offset, length); | |
332 | + if(msBlk->block_cache[i].length - offset == length) { | |
333 | + *next_block = msBlk->block_cache[i].next_index; | |
334 | + *next_offset = 0; | |
335 | + } else { | |
336 | + *next_block = block; | |
337 | + *next_offset = offset + length; | |
338 | + } | |
339 | + | |
340 | + up(&msBlk->block_cache_mutex); | |
341 | + return return_length; | |
342 | + } else { | |
343 | + if(buffer) { | |
344 | + memcpy(buffer, msBlk->block_cache[i].data + offset, bytes); | |
345 | + buffer += bytes; | |
346 | + } | |
347 | + block = msBlk->block_cache[i].next_index; | |
348 | + up(&msBlk->block_cache_mutex); | |
349 | + length -= bytes; | |
350 | + offset = 0; | |
351 | + } | |
352 | + } | |
353 | +} | |
354 | + | |
355 | + | |
356 | +static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode) | |
357 | +{ | |
358 | + struct inode *i = new_inode(s); | |
359 | + squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info; | |
360 | + squashfs_super_block *sBlk = &msBlk->sBlk; | |
361 | + unsigned int block = SQUASHFS_INODE_BLK(inode) + sBlk->inode_table_start; | |
362 | + unsigned int offset = SQUASHFS_INODE_OFFSET(inode); | |
363 | + unsigned int next_block, next_offset; | |
364 | + squashfs_base_inode_header inodeb; | |
365 | + | |
366 | + TRACE("Entered squashfs_iget\n"); | |
367 | + | |
368 | + if(msBlk->swap) { | |
369 | + squashfs_base_inode_header sinodeb; | |
370 | + | |
371 | + if(!squashfs_get_cached_block(s, (char *) &sinodeb, block, offset, | |
372 | + sizeof(sinodeb), &next_block, &next_offset)) | |
373 | + goto failed_read; | |
374 | + SQUASHFS_SWAP_BASE_INODE_HEADER(&inodeb, &sinodeb, sizeof(sinodeb)); | |
375 | + } else | |
376 | + if(!squashfs_get_cached_block(s, (char *) &inodeb, block, offset, | |
377 | + sizeof(inodeb), &next_block, &next_offset)) | |
378 | + goto failed_read; | |
379 | + | |
380 | + i->i_nlink = 1; | |
381 | + | |
382 | + i->i_mtime.tv_sec = sBlk->mkfs_time; | |
383 | + i->i_atime.tv_sec = sBlk->mkfs_time; | |
384 | + i->i_ctime.tv_sec = sBlk->mkfs_time; | |
385 | + | |
386 | + if(inodeb.inode_type != SQUASHFS_IPC_TYPE) | |
387 | + i->i_uid = msBlk->uid[((inodeb.inode_type - 1) / SQUASHFS_TYPES) * 16 + inodeb.uid]; | |
388 | + i->i_ino = SQUASHFS_MK_VFS_INODE(block - sBlk->inode_table_start, offset); | |
389 | + | |
390 | + i->i_mode = inodeb.mode; | |
391 | + | |
392 | + switch(inodeb.inode_type == SQUASHFS_IPC_TYPE ? SQUASHFS_IPC_TYPE : (inodeb.inode_type - 1) % SQUASHFS_TYPES + 1) { | |
393 | + case SQUASHFS_FILE_TYPE: { | |
394 | + squashfs_reg_inode_header inodep; | |
395 | + | |
396 | + if(msBlk->swap) { | |
397 | + squashfs_reg_inode_header sinodep; | |
398 | + | |
399 | + if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep), | |
400 | + &next_block, &next_offset)) | |
401 | + goto failed_read; | |
402 | + SQUASHFS_SWAP_REG_INODE_HEADER(&inodep, &sinodep); | |
403 | + } else | |
404 | + if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep), | |
405 | + &next_block, &next_offset)) | |
406 | + goto failed_read; | |
407 | + | |
408 | + i->i_size = inodep.file_size; | |
409 | + i->i_fop = &generic_ro_fops; | |
410 | + i->i_data.a_ops = &squashfs_aops; | |
411 | + i->i_mode |= S_IFREG; | |
412 | + i->i_mtime.tv_sec = inodep.mtime; | |
413 | + i->i_atime.tv_sec = inodep.mtime; | |
414 | + i->i_ctime.tv_sec = inodep.mtime; | |
415 | + i->i_blocks = ((i->i_size - 1) >> 9) + 1; | |
416 | + i->i_blksize = PAGE_CACHE_SIZE; | |
417 | + SQUASHFS_I(i)->start_block = inodep.start_block; | |
418 | + SQUASHFS_I(i)->block_list_start = next_block; | |
419 | + SQUASHFS_I(i)->offset = next_offset; | |
420 | + TRACE("File inode %x:%x, start_block %x, block_list_start %x, offset %x\n", | |
421 | + SQUASHFS_INODE_BLK(inode), offset, inodep.start_block, next_block, next_offset); | |
422 | + break; | |
423 | + } | |
424 | + case SQUASHFS_DIR_TYPE: { | |
425 | + squashfs_dir_inode_header inodep; | |
426 | + | |
427 | + if(msBlk->swap) { | |
428 | + squashfs_dir_inode_header sinodep; | |
429 | + | |
430 | + if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep), | |
431 | + &next_block, &next_offset)) | |
432 | + goto failed_read; | |
433 | + SQUASHFS_SWAP_DIR_INODE_HEADER(&inodep, &sinodep); | |
434 | + } else | |
435 | + if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep), | |
436 | + &next_block, &next_offset)) | |
437 | + goto failed_read; | |
438 | + | |
439 | + i->i_size = inodep.file_size; | |
440 | + i->i_op = &squashfs_dir_inode_ops; | |
441 | + i->i_fop = &squashfs_dir_ops; | |
442 | + i->i_mode |= S_IFDIR; | |
443 | + i->i_mtime.tv_sec = inodep.mtime; | |
444 | + i->i_atime.tv_sec = inodep.mtime; | |
445 | + i->i_ctime.tv_sec = inodep.mtime; | |
446 | + SQUASHFS_I(i)->start_block = inodep.start_block; | |
447 | + SQUASHFS_I(i)->offset = inodep.offset; | |
448 | + TRACE("Directory inode %x:%x, start_block %x, offset %x\n", SQUASHFS_INODE_BLK(inode), offset, | |
449 | + inodep.start_block, inodep.offset); | |
450 | + break; | |
451 | + } | |
452 | + case SQUASHFS_SYMLINK_TYPE: { | |
453 | + squashfs_symlink_inode_header inodep; | |
454 | + | |
455 | + if(msBlk->swap) { | |
456 | + squashfs_symlink_inode_header sinodep; | |
457 | + | |
458 | + if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep), | |
459 | + &next_block, &next_offset)) | |
460 | + goto failed_read; | |
461 | + SQUASHFS_SWAP_SYMLINK_INODE_HEADER(&inodep, &sinodep); | |
462 | + } else | |
463 | + if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep), | |
464 | + &next_block, &next_offset)) | |
465 | + goto failed_read; | |
466 | + | |
467 | + i->i_size = inodep.symlink_size; | |
468 | + i->i_op = &page_symlink_inode_operations; | |
469 | + i->i_data.a_ops = &squashfs_symlink_aops; | |
470 | + i->i_mode |= S_IFLNK; | |
471 | + SQUASHFS_I(i)->start_block = next_block; | |
472 | + SQUASHFS_I(i)->offset = next_offset; | |
473 | + TRACE("Symbolic link inode %x:%x, start_block %x, offset %x\n", | |
474 | + SQUASHFS_INODE_BLK(inode), offset, next_block, next_offset); | |
475 | + break; | |
476 | + } | |
477 | + case SQUASHFS_BLKDEV_TYPE: | |
478 | + case SQUASHFS_CHRDEV_TYPE: { | |
479 | + squashfs_dev_inode_header inodep; | |
480 | + | |
481 | + if(msBlk->swap) { | |
482 | + squashfs_dev_inode_header sinodep; | |
483 | + | |
484 | + if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep), | |
485 | + &next_block, &next_offset)) | |
486 | + goto failed_read; | |
487 | + SQUASHFS_SWAP_DEV_INODE_HEADER(&inodep, &sinodep); | |
488 | + } else | |
489 | + if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep), | |
490 | + &next_block, &next_offset)) | |
491 | + goto failed_read; | |
492 | + | |
493 | + i->i_size = 0; | |
494 | + i->i_mode |= (inodeb.inode_type == SQUASHFS_CHRDEV_TYPE) ? S_IFCHR : S_IFBLK; | |
495 | + init_special_inode(i, i->i_mode, old_decode_dev(inodep.rdev)); | |
496 | + TRACE("Device inode %x:%x, rdev %x\n", SQUASHFS_INODE_BLK(inode), offset, inodep.rdev); | |
497 | + break; | |
498 | + } | |
499 | + case SQUASHFS_IPC_TYPE: { | |
500 | + squashfs_ipc_inode_header inodep; | |
501 | + | |
502 | + if(msBlk->swap) { | |
503 | + squashfs_ipc_inode_header sinodep; | |
504 | + | |
505 | + if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep), | |
506 | + &next_block, &next_offset)) | |
507 | + goto failed_read; | |
508 | + SQUASHFS_SWAP_IPC_INODE_HEADER(&inodep, &sinodep); | |
509 | + } else | |
510 | + if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep), | |
511 | + &next_block, &next_offset)) | |
512 | + goto failed_read; | |
513 | + | |
514 | + i->i_size = 0; | |
515 | + i->i_mode |= (inodep.type == SQUASHFS_FIFO_TYPE) ? S_IFIFO : S_IFSOCK; | |
516 | + i->i_uid = msBlk->uid[inodep.offset * 16 + inodeb.uid]; | |
517 | + init_special_inode(i, i->i_mode, 0); | |
518 | + break; | |
519 | + } | |
520 | + default: | |
521 | + ERROR("Unknown inode type %d in squashfs_iget!\n", inodeb.inode_type); | |
522 | + goto failed_read1; | |
523 | + } | |
524 | + | |
525 | + if(inodeb.guid == SQUASHFS_GUIDS) | |
526 | + i->i_gid = i->i_uid; | |
527 | + else | |
528 | + i->i_gid = msBlk->guid[inodeb.guid]; | |
529 | + | |
530 | + return i; | |
531 | + | |
532 | +failed_read: | |
533 | + ERROR("Unable to read inode [%x:%x]\n", block, offset); | |
534 | + | |
535 | +failed_read1: | |
536 | + return NULL; | |
537 | +} | |
538 | + | |
539 | + | |
540 | +static int squashfs_fill_super(struct super_block *s, | |
541 | + void *data, int silent) | |
542 | +{ | |
543 | + squashfs_sb_info *msBlk; | |
544 | + squashfs_super_block *sBlk; | |
545 | + int i; | |
546 | + char b[BDEVNAME_SIZE]; | |
547 | + | |
548 | + TRACE("Entered squashfs_read_superblock\n"); | |
549 | + | |
550 | + if(!(msBlk = (squashfs_sb_info *) s->s_fs_info = (void *) kmalloc(sizeof(squashfs_sb_info), GFP_KERNEL))) { | |
551 | + ERROR("Failed to allocate superblock\n"); | |
552 | + return -ENOMEM; | |
553 | + } | |
554 | + sBlk = &msBlk->sBlk; | |
555 | + | |
556 | + msBlk->devblksize = sb_min_blocksize(s, BLOCK_SIZE); | |
557 | + msBlk->devblksize_log2 = ffz(~msBlk->devblksize); | |
558 | + | |
559 | + init_MUTEX(&msBlk->read_page_mutex); | |
560 | + init_MUTEX(&msBlk->block_cache_mutex); | |
561 | + | |
562 | + init_waitqueue_head(&msBlk->waitq); | |
563 | + | |
564 | + if(!read_data(s, (char *) sBlk, SQUASHFS_START, sizeof(squashfs_super_block) | SQUASHFS_COMPRESSED_BIT, NULL)) { | |
565 | + SERROR("unable to read superblock\n"); | |
566 | + goto failed_mount; | |
567 | + } | |
568 | + | |
569 | + /* Check it is a SQUASHFS superblock */ | |
570 | + msBlk->swap = 0; | |
571 | + if((s->s_magic = sBlk->s_magic) != SQUASHFS_MAGIC) { | |
572 | + if(sBlk->s_magic == SQUASHFS_MAGIC_SWAP) { | |
573 | + squashfs_super_block sblk; | |
574 | + WARNING("Mounting a different endian SQUASHFS filesystem on %s\n", bdevname(s->s_bdev, b)); | |
575 | + SQUASHFS_SWAP_SUPER_BLOCK(&sblk, sBlk); | |
576 | + memcpy(sBlk, &sblk, sizeof(squashfs_super_block)); | |
577 | + msBlk->swap = 1; | |
578 | + } else { | |
579 | + SERROR("Can't find a SQUASHFS superblock on %s\n", bdevname(s->s_bdev, b)); | |
580 | + goto failed_mount; | |
581 | + } | |
582 | + } | |
583 | + | |
584 | + /* Check the MAJOR & MINOR versions */ | |
585 | + if(sBlk->s_major != SQUASHFS_MAJOR || sBlk->s_minor > SQUASHFS_MINOR) { | |
586 | + SERROR("Major/Minor mismatch, filesystem is (%d:%d), I support (%d: <= %d)\n", | |
587 | + sBlk->s_major, sBlk->s_minor, SQUASHFS_MAJOR, SQUASHFS_MINOR); | |
588 | + goto failed_mount; | |
589 | + } | |
590 | + | |
591 | + TRACE("Found valid superblock on %s\n", bdevname(s->s_bdev, b)); | |
592 | + TRACE("Inodes are %scompressed\n", SQUASHFS_UNCOMPRESSED_INODES(sBlk->flags) ? "un" : ""); | |
593 | + TRACE("Data is %scompressed\n", SQUASHFS_UNCOMPRESSED_DATA(sBlk->flags) ? "un" : ""); | |
594 | + TRACE("Check data is %s present in the filesystem\n", SQUASHFS_CHECK_DATA(sBlk->flags) ? "" : "not"); | |
595 | + TRACE("Filesystem size %d bytes\n", sBlk->bytes_used); | |
596 | + TRACE("Block size %d\n", sBlk->block_size); | |
597 | + TRACE("Number of inodes %d\n", sBlk->inodes); | |
598 | + TRACE("Number of uids %d\n", sBlk->no_uids); | |
599 | + TRACE("Number of gids %d\n", sBlk->no_guids); | |
600 | + TRACE("sBlk->inode_table_start %x\n", sBlk->inode_table_start); | |
601 | + TRACE("sBlk->directory_table_start %x\n", sBlk->directory_table_start); | |
602 | + TRACE("sBlk->uid_start %x\n", sBlk->uid_start); | |
603 | + | |
604 | + s->s_flags |= MS_RDONLY; | |
605 | + s->s_op = &squashfs_ops; | |
606 | + | |
607 | + /* Init inode_table block pointer array */ | |
608 | + if(!(msBlk->block_cache = (squashfs_cache *) kmalloc(sizeof(squashfs_cache) * SQUASHFS_CACHED_BLKS, GFP_KERNEL))) { | |
609 | + ERROR("Failed to allocate block cache\n"); | |
610 | + goto failed_mount; | |
611 | + } | |
612 | + | |
613 | + for(i = 0; i < SQUASHFS_CACHED_BLKS; i++) | |
614 | + msBlk->block_cache[i].block = SQUASHFS_INVALID_BLK; | |
615 | + | |
616 | + msBlk->next_cache = 0; | |
617 | + | |
618 | + /* Allocate read_data block */ | |
619 | + msBlk->read_size = (sBlk->block_size < SQUASHFS_METADATA_SIZE) ? SQUASHFS_METADATA_SIZE : sBlk->block_size; | |
620 | + if(!(msBlk->read_data = (char *) kmalloc(msBlk->read_size, GFP_KERNEL))) { | |
621 | + ERROR("Failed to allocate read_data block\n"); | |
622 | + goto failed_mount1; | |
623 | + } | |
624 | + | |
625 | + /* Allocate read_page block */ | |
626 | + if(sBlk->block_size > PAGE_CACHE_SIZE && | |
627 | + !(msBlk->read_page = (char *) kmalloc(sBlk->block_size, GFP_KERNEL))) { | |
628 | + ERROR("Failed to allocate read_page block\n"); | |
629 | + goto failed_mount2; | |
630 | + } | |
631 | + | |
632 | + /* Allocate uid and gid tables */ | |
633 | + if(!(msBlk->uid = (squashfs_uid *) kmalloc((sBlk->no_uids + | |
634 | + sBlk->no_guids) * sizeof(squashfs_uid), GFP_KERNEL))) { | |
635 | + ERROR("Failed to allocate uid/gid table\n"); | |
636 | + goto failed_mount3; | |
637 | + } | |
638 | + msBlk->guid = msBlk->uid + sBlk->no_uids; | |
639 | + | |
640 | + if(msBlk->swap) { | |
641 | + squashfs_uid suid[sBlk->no_uids + sBlk->no_guids]; | |
642 | + | |
643 | + if(!read_data(s, (char *) &suid, sBlk->uid_start, ((sBlk->no_uids + sBlk->no_guids) * | |
644 | + sizeof(squashfs_uid)) | SQUASHFS_COMPRESSED_BIT, NULL)) { | |
645 | + SERROR("unable to read uid/gid table\n"); | |
646 | + goto failed_mount4; | |
647 | + } | |
648 | + SQUASHFS_SWAP_DATA(msBlk->uid, suid, (sBlk->no_uids + sBlk->no_guids), (sizeof(squashfs_uid) * 8)); | |
649 | + } else | |
650 | + if(!read_data(s, (char *) msBlk->uid, sBlk->uid_start, ((sBlk->no_uids + sBlk->no_guids) * | |
651 | + sizeof(squashfs_uid)) | SQUASHFS_COMPRESSED_BIT, NULL)) { | |
652 | + SERROR("unable to read uid/gid table\n"); | |
653 | + goto failed_mount4; | |
654 | + } | |
655 | + | |
656 | + if(!(s->s_root = d_alloc_root(squashfs_iget(s, sBlk->root_inode)))) { | |
657 | + ERROR("Root inode create failed\n"); | |
658 | + goto failed_mount4; | |
659 | + } | |
660 | + | |
661 | + TRACE("Leaving squashfs_read_super\n"); | |
662 | + return 0; | |
663 | + | |
664 | +failed_mount4: | |
665 | + kfree(msBlk->uid); | |
666 | +failed_mount3: | |
667 | + kfree(msBlk->read_page); | |
668 | +failed_mount2: | |
669 | + kfree(msBlk->read_data); | |
670 | +failed_mount1: | |
671 | + kfree(msBlk->block_cache); | |
672 | +failed_mount: | |
673 | + kfree(s->s_fs_info); | |
674 | + s->s_fs_info = NULL; | |
675 | + return -EINVAL; | |
676 | +} | |
677 | + | |
678 | + | |
679 | +static int squashfs_statfs(struct super_block *s, struct kstatfs *buf) | |
680 | +{ | |
681 | + squashfs_super_block *sBlk = &((squashfs_sb_info *)s->s_fs_info)->sBlk; | |
682 | + | |
683 | + TRACE("Entered squashfs_statfs\n"); | |
684 | + buf->f_type = SQUASHFS_MAGIC; | |
685 | + buf->f_bsize = sBlk->block_size; | |
686 | + buf->f_blocks = ((sBlk->bytes_used - 1) >> sBlk->block_log) + 1; | |
687 | + buf->f_bfree = buf->f_bavail = 0; | |
688 | + buf->f_files = sBlk->inodes; | |
689 | + buf->f_ffree = 0; | |
690 | + buf->f_namelen = SQUASHFS_NAME_LEN; | |
691 | + return 0; | |
692 | +} | |
693 | + | |
694 | + | |
695 | +static int squashfs_symlink_readpage(struct file *file, struct page *page) | |
696 | +{ | |
697 | + struct inode *inode = page->mapping->host; | |
698 | + int index = page->index << PAGE_CACHE_SHIFT, length, bytes; | |
699 | + int block = SQUASHFS_I(inode)->start_block; | |
700 | + int offset = SQUASHFS_I(inode)->offset; | |
701 | + void *pageaddr = kmap(page); | |
702 | + | |
703 | + TRACE("Entered squashfs_symlink_readpage, page index %d, start block %x, offset %x\n", | |
704 | + page->index, SQUASHFS_I(inode)->start_block, SQUASHFS_I(i)->offset); | |
705 | + | |
706 | + for(length = 0; length < index; length += bytes) { | |
707 | + if(!(bytes = squashfs_get_cached_block(inode->i_sb, NULL, block, offset, | |
708 | + PAGE_CACHE_SIZE, &block, &offset))) { | |
709 | + ERROR("Unable to read symbolic link [%x:%x]\n", block, offset); | |
710 | + goto skip_read; | |
711 | + } | |
712 | + } | |
713 | + | |
714 | + if(length != index) { | |
715 | + ERROR("(squashfs_symlink_readpage) length != index\n"); | |
716 | + bytes = 0; | |
717 | + goto skip_read; | |
718 | + } | |
719 | + | |
720 | + bytes = (inode->i_size - length) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : inode->i_size - length; | |
721 | + if(!(bytes = squashfs_get_cached_block(inode->i_sb, pageaddr, block, offset, bytes, &block, &offset))) | |
722 | + ERROR("Unable to read symbolic link [%x:%x]\n", block, offset); | |
723 | + | |
724 | +skip_read: | |
725 | + memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes); | |
726 | + kunmap(page); | |
727 | + flush_dcache_page(page); | |
728 | + SetPageUptodate(page); | |
729 | + unlock_page(page); | |
730 | + | |
731 | + return 0; | |
732 | +} | |
733 | + | |
734 | + | |
735 | +#define SIZE 256 | |
736 | +static int squashfs_readpage(struct file *file, struct page *page) | |
737 | +{ | |
738 | + struct inode *inode = page->mapping->host; | |
739 | + squashfs_sb_info *msBlk = (squashfs_sb_info *)inode->i_sb->s_fs_info; | |
740 | + squashfs_super_block *sBlk = &msBlk->sBlk; | |
741 | + unsigned char block_list[SIZE]; | |
742 | + unsigned short *block_listp; | |
743 | + int index = sBlk->block_log > PAGE_CACHE_SHIFT ? | |
744 | + page->index >> (sBlk->block_log - PAGE_CACHE_SHIFT) : | |
745 | + page->index << (PAGE_CACHE_SHIFT - sBlk->block_log); | |
746 | + int block = SQUASHFS_I(inode)->start_block, i = 0; | |
747 | + int bytes = 0, block_ptr = SQUASHFS_I(inode)->block_list_start; | |
748 | + int offset = SQUASHFS_I(inode)->offset; | |
749 | + int file_blocks = ((inode->i_size - 1) >> sBlk->block_log) + 1; | |
750 | + int readahead_blks = sBlk->block_log >= PAGE_CACHE_SHIFT ? 1 : 1 << (PAGE_CACHE_SHIFT - sBlk->block_log); | |
751 | + void *pageaddr = kmap(page); | |
752 | + | |
753 | + TRACE("Entered squashfs_readpage, page index %d, start block %x\n", page->index, | |
754 | + SQUASHFS_I(inode)->start_block); | |
755 | + | |
756 | + if(index > file_blocks) | |
757 | + goto skip_read; | |
758 | + | |
759 | + for(;;) { | |
760 | + int blocks = (index + readahead_blks - i); | |
761 | + if(blocks > (SIZE >> 1)) { | |
762 | + if((index - i) <= (SIZE >> 1)) | |
763 | + blocks = index - i; | |
764 | + else | |
765 | + blocks = SIZE >> 1; | |
766 | + } | |
767 | + | |
768 | + if(msBlk->swap) { | |
769 | + unsigned char sblock_list[SIZE]; | |
770 | + if(!squashfs_get_cached_block(inode->i_sb, (char *) sblock_list, block_ptr, offset, blocks << 1, &block_ptr, &offset)) { | |
771 | + ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset); | |
772 | + goto skip_read; | |
773 | + } | |
774 | + SQUASHFS_SWAP_SHORTS(((unsigned short *)block_list), ((unsigned short *)sblock_list), blocks); | |
775 | + } else | |
776 | + if(!squashfs_get_cached_block(inode->i_sb, (char *) block_list, block_ptr, offset, blocks << 1, &block_ptr, &offset)) { | |
777 | + ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset); | |
778 | + goto skip_read; | |
779 | + } | |
780 | + for(block_listp = (unsigned short *) block_list; i < index && blocks; i ++, block_listp ++, blocks --) | |
781 | + block += SQUASHFS_COMPRESSED_SIZE(*block_listp); | |
782 | + if(blocks >= readahead_blks) | |
783 | + break; | |
784 | + } | |
785 | + | |
786 | + if(sBlk->block_log > PAGE_CACHE_SHIFT) { | |
787 | + int mask = (1 << (sBlk->block_log - PAGE_CACHE_SHIFT)) - 1; | |
788 | + int start_index = page->index & ~mask; | |
789 | + int end_index = start_index | mask; | |
790 | + int byte_offset = 0; | |
791 | + | |
792 | + down(&msBlk->read_page_mutex); | |
793 | + if(!(bytes = read_data(inode->i_sb, msBlk->read_page, block, *block_listp, NULL))) { | |
794 | + ERROR("Unable to read page, block %x, size %x\n", block, (int) *block_listp); | |
795 | + goto skip_read; | |
796 | + } | |
797 | + | |
798 | + for(i = start_index; i <= end_index && byte_offset < bytes; i++, byte_offset += PAGE_CACHE_SIZE) { | |
799 | + int available_bytes = (bytes - byte_offset) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : bytes - byte_offset; | |
800 | + | |
801 | + TRACE("bytes %d, i %d, byte_offset %d, available_bytes %d\n", bytes, i, byte_offset, available_bytes); | |
802 | + | |
803 | + if(i == page->index) { | |
804 | + memcpy(pageaddr, msBlk->read_page + byte_offset, available_bytes); | |
805 | + memset(pageaddr + available_bytes, 0, PAGE_CACHE_SIZE - available_bytes); | |
806 | + kunmap(page); | |
807 | + flush_dcache_page(page); | |
808 | + SetPageUptodate(page); | |
809 | + unlock_page(page); | |
810 | + } else { | |
811 | + struct page *push_page; | |
812 | + | |
813 | + if((push_page = grab_cache_page_nowait(page->mapping, i))) { | |
814 | + void *pageaddr = kmap(push_page); | |
815 | + memcpy(pageaddr, msBlk->read_page + byte_offset, available_bytes); | |
816 | + memset(pageaddr + available_bytes, 0, PAGE_CACHE_SIZE - available_bytes); | |
817 | + kunmap(push_page); | |
818 | + flush_dcache_page(push_page); | |
819 | + SetPageUptodate(push_page); | |
820 | + unlock_page(push_page); | |
821 | + page_cache_release(push_page); | |
822 | + } | |
823 | + } | |
824 | + } | |
825 | + up( &msBlk->read_page_mutex); | |
826 | + | |
827 | + return 0; | |
828 | + | |
829 | + } else if(sBlk->block_log == PAGE_CACHE_SHIFT) { | |
830 | + if(!(bytes = read_data(inode->i_sb, pageaddr, block, *block_listp, NULL))) | |
831 | + ERROR("Unable to read page, block %x, size %x\n", block, (int) *block_listp); | |
832 | + | |
833 | + } else { | |
834 | + int i_end = index + (1 << (PAGE_CACHE_SHIFT - sBlk->block_log)); | |
835 | + char *p = (char *) pageaddr; | |
836 | + int byte; | |
837 | + | |
838 | + if(i_end > file_blocks) | |
839 | + i_end = file_blocks; | |
840 | + | |
841 | + while(index < i_end) { | |
842 | + if(!(byte = read_data(inode->i_sb, p, block, *block_listp, NULL))) { | |
843 | + ERROR("Unable to read page, block %x, size %x\n", block, (int) *block_listp); | |
844 | + goto skip_read; | |
845 | + } | |
846 | + block += SQUASHFS_COMPRESSED_SIZE(*block_listp); | |
847 | + p += byte; | |
848 | + bytes += byte; | |
849 | + index ++; | |
850 | + block_listp ++; | |
851 | + } | |
852 | + } | |
853 | + | |
854 | +skip_read: | |
855 | + memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes); | |
856 | + kunmap(page); | |
857 | + flush_dcache_page(page); | |
858 | + SetPageUptodate(page); | |
859 | + unlock_page(page); | |
860 | + | |
861 | + return 0; | |
862 | +} | |
863 | + | |
864 | + | |
865 | +static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir) | |
866 | +{ | |
867 | + struct inode *i = file->f_dentry->d_inode; | |
868 | + squashfs_sb_info *msBlk = (squashfs_sb_info *)i->i_sb->s_fs_info; | |
869 | + squashfs_super_block *sBlk = &msBlk->sBlk; | |
870 | + int next_block = SQUASHFS_I(i)->start_block + sBlk->directory_table_start, next_offset = | |
871 | + SQUASHFS_I(i)->offset, length = 0, dirs_read = 0, dir_count; | |
872 | + squashfs_dir_header dirh; | |
873 | + char buffer[sizeof(squashfs_dir_entry) + SQUASHFS_NAME_LEN + 1]; | |
874 | + squashfs_dir_entry *dire = (squashfs_dir_entry *) buffer; | |
875 | + | |
876 | + TRACE("Entered squashfs_readdir [%x:%x]\n", next_block, next_offset); | |
877 | + | |
878 | + lock_kernel(); | |
879 | + while(length < i->i_size) { | |
880 | + /* read directory header */ | |
881 | + if(msBlk->swap) { | |
882 | + squashfs_dir_header sdirh; | |
883 | + if(!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, next_block, | |
884 | + next_offset, sizeof(sdirh), &next_block, &next_offset)) | |
885 | + goto failed_read; | |
886 | + length += sizeof(sdirh); | |
887 | + SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh); | |
888 | + } else { | |
889 | + if(!squashfs_get_cached_block(i->i_sb, (char *) &dirh, next_block, | |
890 | + next_offset, sizeof(dirh), &next_block, &next_offset)) | |
891 | + goto failed_read; | |
892 | + length += sizeof(dirh); | |
893 | + } | |
894 | + | |
895 | + dir_count = dirh.count + 1; | |
896 | + while(dir_count--) { | |
897 | + if(msBlk->swap) { | |
898 | + squashfs_dir_entry sdire; | |
899 | + if(!squashfs_get_cached_block(i->i_sb, (char *) &sdire, next_block, | |
900 | + next_offset, sizeof(sdire), &next_block, &next_offset)) | |
901 | + goto failed_read; | |
902 | + length += sizeof(sdire); | |
903 | + SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire); | |
904 | + } else { | |
905 | + if(!squashfs_get_cached_block(i->i_sb, (char *) dire, next_block, | |
906 | + next_offset, sizeof(*dire), &next_block, &next_offset)) | |
907 | + goto failed_read; | |
908 | + length += sizeof(*dire); | |
909 | + } | |
910 | + | |
911 | + if(!squashfs_get_cached_block(i->i_sb, dire->name, next_block, | |
912 | + next_offset, dire->size + 1, &next_block, &next_offset)) | |
913 | + goto failed_read; | |
914 | + length += dire->size + 1; | |
915 | + | |
916 | + if(file->f_pos >= length) | |
917 | + continue; | |
918 | + | |
919 | + dire->name[dire->size + 1] = '\0'; | |
920 | + | |
921 | + TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d)\n", dirent, | |
922 | + dire->name, dire->size + 1, (int) file->f_pos, | |
923 | + dirh.start_block, dire->offset, squashfs_filetype_table[dire->type]); | |
924 | + | |
925 | + if(filldir(dirent, dire->name, dire->size + 1, file->f_pos, SQUASHFS_MK_VFS_INODE(dirh.start_block, | |
926 | + dire->offset), squashfs_filetype_table[dire->type]) < 0) { | |
927 | + TRACE("Filldir returned less than 0\n"); | |
928 | + unlock_kernel(); | |
929 | + return dirs_read; | |
930 | + } | |
931 | + | |
932 | + file->f_pos = length; | |
933 | + dirs_read ++; | |
934 | + } | |
935 | + } | |
936 | + | |
937 | + unlock_kernel(); | |
938 | + return dirs_read; | |
939 | + | |
940 | +failed_read: | |
941 | + unlock_kernel(); | |
942 | + ERROR("Unable to read directory block [%x:%x]\n", next_block, next_offset); | |
943 | + return 0; | |
944 | +} | |
945 | + | |
946 | + | |
947 | +static struct dentry *squashfs_lookup(struct inode *i, struct dentry *dentry, struct nameidata *nd) | |
948 | +{ | |
949 | + const char *name =dentry->d_name.name; | |
950 | + int len = dentry->d_name.len; | |
951 | + struct inode *inode = NULL; | |
952 | + squashfs_sb_info *msBlk = (squashfs_sb_info *)i->i_sb->s_fs_info; | |
953 | + squashfs_super_block *sBlk = &msBlk->sBlk; | |
954 | + int next_block = SQUASHFS_I(i)->start_block + sBlk->directory_table_start, next_offset = | |
955 | + SQUASHFS_I(i)->offset, length = 0, dir_count; | |
956 | + squashfs_dir_header dirh; | |
957 | + char buffer[sizeof(squashfs_dir_entry) + SQUASHFS_NAME_LEN]; | |
958 | + squashfs_dir_entry *dire = (squashfs_dir_entry *) buffer; | |
959 | + | |
960 | + TRACE("Entered squashfs_lookup [%x:%x]\n", next_block, next_offset); | |
961 | + | |
962 | + lock_kernel(); | |
963 | + while(length < i->i_size) { | |
964 | + /* read directory header */ | |
965 | + if(msBlk->swap) { | |
966 | + squashfs_dir_header sdirh; | |
967 | + if(!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, next_block, next_offset, | |
968 | + sizeof(sdirh), &next_block, &next_offset)) | |
969 | + goto failed_read; | |
970 | + length += sizeof(sdirh); | |
971 | + SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh); | |
972 | + } else { | |
973 | + if(!squashfs_get_cached_block(i->i_sb, (char *) &dirh, next_block, next_offset, | |
974 | + sizeof(dirh), &next_block, &next_offset)) | |
975 | + goto failed_read; | |
976 | + length += sizeof(dirh); | |
977 | + } | |
978 | + | |
979 | + dir_count = dirh.count + 1; | |
980 | + while(dir_count--) { | |
981 | + if(msBlk->swap) { | |
982 | + squashfs_dir_entry sdire; | |
983 | + if(!squashfs_get_cached_block(i->i_sb, (char *) &sdire, | |
984 | + next_block,next_offset, sizeof(sdire), &next_block, &next_offset)) | |
985 | + goto failed_read; | |
986 | + length += sizeof(sdire); | |
987 | + SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire); | |
988 | + } else { | |
989 | + if(!squashfs_get_cached_block(i->i_sb, (char *) dire, | |
990 | + next_block,next_offset, sizeof(*dire), &next_block, &next_offset)) | |
991 | + goto failed_read; | |
992 | + length += sizeof(*dire); | |
993 | + } | |
994 | + | |
995 | + if(!squashfs_get_cached_block(i->i_sb, dire->name, | |
996 | + next_block, next_offset, dire->size + 1, &next_block, &next_offset)) | |
997 | + goto failed_read; | |
998 | + length += dire->size + 1; | |
999 | + | |
1000 | + if((len == dire->size + 1) && !strncmp(name, dire->name, len)) { | |
1001 | + squashfs_inode ino = SQUASHFS_MKINODE(dirh.start_block, dire->offset); | |
1002 | + | |
1003 | + TRACE("calling squashfs_iget for directory entry %s, inode %x:%x\n", | |
1004 | + name, dirh.start_block, dire->offset); | |
1005 | + | |
1006 | + inode = squashfs_iget(i->i_sb, ino); | |
1007 | + | |
1008 | + goto exit_loop; | |
1009 | + } | |
1010 | + } | |
1011 | + } | |
1012 | + | |
1013 | +exit_loop: | |
1014 | + d_add(dentry, inode); | |
1015 | + unlock_kernel(); | |
1016 | + return ERR_PTR(0); | |
1017 | + | |
1018 | +failed_read: | |
1019 | + ERROR("Unable to read directory block [%x:%x]\n", next_block, next_offset); | |
1020 | + goto exit_loop; | |
1021 | +} | |
1022 | + | |
1023 | + | |
1024 | +static void squashfs_put_super(struct super_block *s) | |
1025 | +{ | |
1026 | + if(s->s_fs_info) { | |
1027 | + squashfs_sb_info *sbi = (squashfs_sb_info *) s->s_fs_info; | |
1028 | + if(sbi->block_cache) kfree(sbi->block_cache); | |
1029 | + if(sbi->read_data) kfree(sbi->read_data); | |
1030 | + if(sbi->read_page) kfree(sbi->read_page); | |
1031 | + if(sbi->uid) kfree(sbi->uid); | |
1032 | + kfree(s->s_fs_info); | |
1033 | + s->s_fs_info = NULL; | |
1034 | + } | |
1035 | +} | |
1036 | + | |
1037 | + | |
1038 | +static struct super_block *squashfs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) | |
1039 | +{ | |
1040 | + return get_sb_bdev(fs_type, flags, dev_name, data, squashfs_fill_super); | |
1041 | +} | |
1042 | + | |
1043 | + | |
1044 | +static int __init init_squashfs_fs(void) | |
1045 | +{ | |
1046 | + int err = init_inodecache(); | |
1047 | + if(err) | |
1048 | + return err; | |
1049 | + | |
1050 | + if(!(stream.workspace = (char *) vmalloc(zlib_inflate_workspacesize()))) { | |
1051 | + ERROR("Failed to allocate zlib workspace\n"); | |
1052 | + destroy_inodecache(); | |
1053 | + return -ENOMEM; | |
1054 | + } | |
1055 | + | |
1056 | + if((err = register_filesystem(&squashfs_fs_type))) { | |
1057 | + vfree(stream.workspace); | |
1058 | + destroy_inodecache(); | |
1059 | + } | |
1060 | + | |
1061 | + return err; | |
1062 | +} | |
1063 | + | |
1064 | + | |
1065 | +static void __exit exit_squashfs_fs(void) | |
1066 | +{ | |
1067 | + vfree(stream.workspace); | |
1068 | + unregister_filesystem(&squashfs_fs_type); | |
1069 | + destroy_inodecache(); | |
1070 | +} | |
1071 | + | |
1072 | + | |
1073 | +static kmem_cache_t * squashfs_inode_cachep; | |
1074 | + | |
1075 | +static struct inode *squashfs_alloc_inode(struct super_block *sb) | |
1076 | +{ | |
1077 | + struct squashfs_inode_info *ei; | |
1078 | + ei = (struct squashfs_inode_info *)kmem_cache_alloc(squashfs_inode_cachep, SLAB_KERNEL); | |
1079 | + if (!ei) | |
1080 | + return NULL; | |
1081 | + return &ei->vfs_inode; | |
1082 | +} | |
1083 | + | |
1084 | +static void squashfs_destroy_inode(struct inode *inode) | |
1085 | +{ | |
1086 | + kmem_cache_free(squashfs_inode_cachep, SQUASHFS_I(inode)); | |
1087 | +} | |
1088 | + | |
1089 | +static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) | |
1090 | +{ | |
1091 | + struct squashfs_inode_info *ei = (struct squashfs_inode_info *) foo; | |
1092 | + | |
1093 | + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
1094 | + SLAB_CTOR_CONSTRUCTOR) | |
1095 | + inode_init_once(&ei->vfs_inode); | |
1096 | +} | |
1097 | + | |
1098 | +static int init_inodecache(void) | |
1099 | +{ | |
1100 | + squashfs_inode_cachep = kmem_cache_create("squashfs_inode_cache", | |
1101 | + sizeof(struct squashfs_inode_info), | |
1102 | + 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT, | |
1103 | + init_once, NULL); | |
1104 | + if (squashfs_inode_cachep == NULL) | |
1105 | + return -ENOMEM; | |
1106 | + return 0; | |
1107 | +} | |
1108 | + | |
1109 | +static void destroy_inodecache(void) | |
1110 | +{ | |
1111 | + if (kmem_cache_destroy(squashfs_inode_cachep)) | |
1112 | + printk(KERN_INFO "squashfs_inode_cache: not all structures were freed\n"); | |
1113 | +} | |
1114 | + | |
1115 | +module_init(init_squashfs_fs); | |
1116 | +module_exit(exit_squashfs_fs); | |
1117 | +MODULE_DESCRIPTION("squashfs, a compressed read-only filesystem"); | |
1118 | +MODULE_AUTHOR("Phillip Lougher <phillip@lougher.demon.co.uk>"); | |
1119 | +MODULE_LICENSE("GPL"); | |
1120 | diff --new-file -ur linux-2.6.1/fs/squashfs/Makefile linux-2.6.1-squashfs1.3r3/fs/squashfs/Makefile | |
1121 | --- linux-2.6.1/fs/squashfs/Makefile 1970-01-01 01:00:00.000000000 +0100 | |
1122 | +++ linux-2.6.1-squashfs1.3r3/fs/squashfs/Makefile 2004-01-17 23:44:35.000000000 +0000 | |
1123 | @@ -0,0 +1,7 @@ | |
1124 | +# | |
1125 | +# Makefile for the linux squashfs routines. | |
1126 | +# | |
1127 | + | |
1128 | +obj-$(CONFIG_SQUASHFS) += squashfs.o | |
1129 | + | |
1130 | +squashfs-objs := inode.o | |
1131 | diff --new-file -ur linux-2.6.1/include/linux/squashfs_fs.h linux-2.6.1-squashfs1.3r3/include/linux/squashfs_fs.h | |
1132 | --- linux-2.6.1/include/linux/squashfs_fs.h 1970-01-01 01:00:00.000000000 +0100 | |
1133 | +++ linux-2.6.1-squashfs1.3r3/include/linux/squashfs_fs.h 2004-01-17 23:44:35.000000000 +0000 | |
1134 | @@ -0,0 +1,323 @@ | |
1135 | +#ifndef SQUASHFS_FS | |
1136 | +#define SQUASHFS_FS | |
1137 | +/* | |
1138 | + * Squashfs | |
1139 | + * | |
1140 | + * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk> | |
1141 | + * | |
1142 | + * This program is free software; you can redistribute it and/or | |
1143 | + * modify it under the terms of the GNU General Public License | |
1144 | + * as published by the Free Software Foundation; either version | |
1145 | + * 2 of the License, or (at your option) any later version. | |
1146 | + * | |
1147 | + * squashfs_fs.h | |
1148 | + */ | |
1149 | + | |
1150 | +#define SQUASHFS_MAJOR 1 | |
1151 | +#define SQUASHFS_MINOR 0 | |
1152 | +#define SQUASHFS_MAGIC 0x73717368 | |
1153 | +#define SQUASHFS_MAGIC_SWAP 0x68737173 | |
1154 | +#define SQUASHFS_START 0 | |
1155 | + | |
1156 | +/* size of metadata (inode and directory) blocks */ | |
1157 | +#define SQUASHFS_METADATA_SIZE 8192 | |
1158 | +#define SQUASHFS_METADATA_LOG 13 | |
1159 | + | |
1160 | +/* default size of data blocks */ | |
1161 | +#define SQUASHFS_FILE_SIZE 32768 | |
1162 | +#define SQUASHFS_FILE_LOG 15 | |
1163 | + | |
1164 | +#define SQUASHFS_FILE_MAX_SIZE 32768 | |
1165 | + | |
1166 | +/* Max number of uids and gids */ | |
1167 | +#define SQUASHFS_UIDS 48 | |
1168 | +#define SQUASHFS_GUIDS 15 | |
1169 | + | |
1170 | +/* Max length of filename (not 255) */ | |
1171 | +#define SQUASHFS_NAME_LEN 256 | |
1172 | + | |
1173 | +#define SQUASHFS_INVALID ((long long) 0xffffffffffff) | |
1174 | +#define SQUASHFS_INVALID_BLK ((long long) 0xffffffff) | |
1175 | +#define SQUASHFS_USED_BLK ((long long) 0xfffffffe) | |
1176 | + | |
1177 | +/* Filesystem flags */ | |
1178 | +#define SQUASHFS_NOI 1 | |
1179 | +#define SQUASHFS_NOD 2 | |
1180 | +#define SQUASHFS_CHECK 4 | |
1181 | +#define SQUASHFS_UNCOMPRESSED_INODES(flags) (flags & SQUASHFS_NOI) | |
1182 | +#define SQUASHFS_UNCOMPRESSED_DATA(flags) (flags & SQUASHFS_NOD) | |
1183 | +#define SQUASHFS_CHECK_DATA(flags) (flags & SQUASHFS_CHECK) | |
1184 | +#define SQUASHFS_MKFLAGS(noi, nod, check_data) (noi | (nod << 1) | (check_data << 2)) | |
1185 | + | |
1186 | +/* Max number of types and file types */ | |
1187 | +#define SQUASHFS_TYPES 5 | |
1188 | +#define SQUASHFS_DIR_TYPE 1 | |
1189 | +#define SQUASHFS_FILE_TYPE 2 | |
1190 | +#define SQUASHFS_SYMLINK_TYPE 3 | |
1191 | +#define SQUASHFS_BLKDEV_TYPE 4 | |
1192 | +#define SQUASHFS_CHRDEV_TYPE 5 | |
1193 | + | |
1194 | +#define SQUASHFS_IPC_TYPE 0 | |
1195 | +#define SQUASHFS_FIFO_TYPE 6 | |
1196 | +#define SQUASHFS_SOCKET_TYPE 7 | |
1197 | + | |
1198 | +/* Flag whether block is compressed or uncompressed, bit is set if block is uncompressed */ | |
1199 | +#define SQUASHFS_COMPRESSED_BIT (1 << 15) | |
1200 | +#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \ | |
1201 | + (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT) | |
1202 | + | |
1203 | +#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT)) | |
1204 | + | |
1205 | +/* | |
1206 | + * Inode number ops. Inodes consist of a compressed block number, and an uncompressed | |
1207 | + * offset within that block | |
1208 | + */ | |
1209 | +#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16)) | |
1210 | +#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff)) | |
1211 | +#define SQUASHFS_MKINODE(A, B) ((squashfs_inode)(((squashfs_inode) (A) << 16)\ | |
1212 | + + (B))) | |
1213 | + | |
1214 | +/* Compute 32 bit VFS inode number from squashfs inode number */ | |
1215 | +#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + ((b) >> 2) + 1)) | |
1216 | + | |
1217 | +/* Translate between VFS mode and squashfs mode */ | |
1218 | +#define SQUASHFS_MODE(a) ((a) & 0xfff) | |
1219 | + | |
1220 | +/* cached data constants for filesystem */ | |
1221 | +#define SQUASHFS_CACHED_BLKS 8 | |
1222 | + | |
1223 | +#define SQUASHFS_MAX_FILE_SIZE_LOG 32 | |
1224 | +#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << (SQUASHFS_MAX_FILE_SIZE_LOG - 1)) | |
1225 | + | |
1226 | +#define SQUASHFS_MARKER_BYTE 0xff | |
1227 | + | |
1228 | +/* | |
1229 | + * definitions for structures on disk | |
1230 | + */ | |
1231 | + | |
1232 | +typedef unsigned int squashfs_block; | |
1233 | +typedef long long squashfs_inode; | |
1234 | + | |
1235 | +typedef unsigned int squashfs_uid; | |
1236 | + | |
1237 | +typedef struct squashfs_super_block { | |
1238 | + unsigned int s_magic; | |
1239 | + unsigned int inodes; | |
1240 | + unsigned int bytes_used; | |
1241 | + unsigned int uid_start; | |
1242 | + unsigned int guid_start; | |
1243 | + unsigned int inode_table_start; | |
1244 | + unsigned int directory_table_start; | |
1245 | + unsigned int s_major:16; | |
1246 | + unsigned int s_minor:16; | |
1247 | + unsigned int block_size:16; | |
1248 | + unsigned int block_log:16; | |
1249 | + unsigned int flags:8; | |
1250 | + unsigned int no_uids:8; | |
1251 | + unsigned int no_guids:8; | |
1252 | + time_t mkfs_time /* time of filesystem creation */; | |
1253 | + squashfs_inode root_inode; | |
1254 | +} __attribute__ ((packed)) squashfs_super_block; | |
1255 | + | |
1256 | +typedef struct { | |
1257 | + unsigned int inode_type:4; | |
1258 | + unsigned int mode:12; /* protection */ | |
1259 | + unsigned int uid:4; /* index into uid table */ | |
1260 | + unsigned int guid:4; /* index into guid table */ | |
1261 | +} __attribute__ ((packed)) squashfs_base_inode_header; | |
1262 | + | |
1263 | +typedef struct { | |
1264 | + unsigned int inode_type:4; | |
1265 | + unsigned int mode:12; /* protection */ | |
1266 | + unsigned int uid:4; /* index into uid table */ | |
1267 | + unsigned int guid:4; /* index into guid table */ | |
1268 | + unsigned int type:4; | |
1269 | + unsigned int offset:4; | |
1270 | +} __attribute__ ((packed)) squashfs_ipc_inode_header; | |
1271 | + | |
1272 | +typedef struct { | |
1273 | + unsigned int inode_type:4; | |
1274 | + unsigned int mode:12; /* protection */ | |
1275 | + unsigned int uid:4; /* index into uid table */ | |
1276 | + unsigned int guid:4; /* index into guid table */ | |
1277 | + unsigned short rdev; | |
1278 | +} __attribute__ ((packed)) squashfs_dev_inode_header; | |
1279 | + | |
1280 | +typedef struct { | |
1281 | + unsigned int inode_type:4; | |
1282 | + unsigned int mode:12; /* protection */ | |
1283 | + unsigned int uid:4; /* index into uid table */ | |
1284 | + unsigned int guid:4; /* index into guid table */ | |
1285 | + unsigned short symlink_size; | |
1286 | + char symlink[0]; | |
1287 | +} __attribute__ ((packed)) squashfs_symlink_inode_header; | |
1288 | + | |
1289 | +typedef struct { | |
1290 | + unsigned int inode_type:4; | |
1291 | + unsigned int mode:12; /* protection */ | |
1292 | + unsigned int uid:4; /* index into uid table */ | |
1293 | + unsigned int guid:4; /* index into guid table */ | |
1294 | + time_t mtime; | |
1295 | + squashfs_block start_block; | |
1296 | + unsigned int file_size:SQUASHFS_MAX_FILE_SIZE_LOG; | |
1297 | + unsigned short block_list[0]; | |
1298 | +} __attribute__ ((packed)) squashfs_reg_inode_header; | |
1299 | + | |
1300 | +typedef struct { | |
1301 | + unsigned int inode_type:4; | |
1302 | + unsigned int mode:12; /* protection */ | |
1303 | + unsigned int uid:4; /* index into uid table */ | |
1304 | + unsigned int guid:4; /* index into guid table */ | |
1305 | + unsigned int file_size:19; | |
1306 | + unsigned int offset:13; | |
1307 | + time_t mtime; | |
1308 | + unsigned int start_block:24; | |
1309 | +} __attribute__ ((packed)) squashfs_dir_inode_header; | |
1310 | + | |
1311 | +typedef union { | |
1312 | + squashfs_base_inode_header base; | |
1313 | + squashfs_dev_inode_header dev; | |
1314 | + squashfs_symlink_inode_header symlink; | |
1315 | + squashfs_reg_inode_header reg; | |
1316 | + squashfs_dir_inode_header dir; | |
1317 | + squashfs_ipc_inode_header ipc; | |
1318 | +} squashfs_inode_header; | |
1319 | + | |
1320 | +typedef struct { | |
1321 | + unsigned int offset:13; | |
1322 | + unsigned int type:3; | |
1323 | + unsigned int size:8; | |
1324 | + char name[0]; | |
1325 | +} __attribute__ ((packed)) squashfs_dir_entry; | |
1326 | + | |
1327 | +typedef struct { | |
1328 | + unsigned int count:8; | |
1329 | + unsigned int start_block:24; | |
1330 | +} __attribute__ ((packed)) squashfs_dir_header; | |
1331 | + | |
1332 | + | |
1333 | +extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen); | |
1334 | +extern int squashfs_uncompress_init(void); | |
1335 | +extern int squashfs_uncompress_exit(void); | |
1336 | + | |
1337 | +/* | |
1338 | + * macros to convert each packed bitfield structure from little endian to big | |
1339 | + * endian and vice versa. These are needed when creating or using a filesystem on a | |
1340 | + * machine with different byte ordering to the target architecture. | |
1341 | + * | |
1342 | + */ | |
1343 | + | |
1344 | +#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\ | |
1345 | + SQUASHFS_MEMSET(s, d, sizeof(squashfs_super_block));\ | |
1346 | + SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\ | |
1347 | + SQUASHFS_SWAP((s)->inodes, d, 32, 32);\ | |
1348 | + SQUASHFS_SWAP((s)->bytes_used, d, 64, 32);\ | |
1349 | + SQUASHFS_SWAP((s)->uid_start, d, 96, 32);\ | |
1350 | + SQUASHFS_SWAP((s)->guid_start, d, 128, 32);\ | |
1351 | + SQUASHFS_SWAP((s)->inode_table_start, d, 160, 32);\ | |
1352 | + SQUASHFS_SWAP((s)->directory_table_start, d, 192, 32);\ | |
1353 | + SQUASHFS_SWAP((s)->s_major, d, 224, 16);\ | |
1354 | + SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\ | |
1355 | + SQUASHFS_SWAP((s)->block_size, d, 256, 16);\ | |
1356 | + SQUASHFS_SWAP((s)->block_log, d, 272, 16);\ | |
1357 | + SQUASHFS_SWAP((s)->flags, d, 288, 8);\ | |
1358 | + SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\ | |
1359 | + SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\ | |
1360 | + SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\ | |
1361 | + SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\ | |
1362 | +} | |
1363 | + | |
1364 | +#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\ | |
1365 | + SQUASHFS_MEMSET(s, d, n);\ | |
1366 | + SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\ | |
1367 | + SQUASHFS_SWAP((s)->mode, d, 4, 12);\ | |
1368 | + SQUASHFS_SWAP((s)->uid, d, 16, 4);\ | |
1369 | + SQUASHFS_SWAP((s)->guid, d, 20, 4);\ | |
1370 | +} | |
1371 | + | |
1372 | +#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\ | |
1373 | + SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dev_inode_header));\ | |
1374 | + SQUASHFS_SWAP((s)->type, d, 24, 4);\ | |
1375 | + SQUASHFS_SWAP((s)->offset, d, 28, 4);\ | |
1376 | +} | |
1377 | +#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\ | |
1378 | + SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dev_inode_header));\ | |
1379 | + SQUASHFS_SWAP((s)->rdev, d, 24, 16);\ | |
1380 | +} | |
1381 | + | |
1382 | +#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\ | |
1383 | + SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_symlink_inode_header));\ | |
1384 | + SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\ | |
1385 | +} | |
1386 | + | |
1387 | +#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\ | |
1388 | + SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_reg_inode_header));\ | |
1389 | + SQUASHFS_SWAP((s)->mtime, d, 24, 32);\ | |
1390 | + SQUASHFS_SWAP((s)->start_block, d, 56, 32);\ | |
1391 | + SQUASHFS_SWAP((s)->file_size, d, 88, SQUASHFS_MAX_FILE_SIZE_LOG);\ | |
1392 | +} | |
1393 | + | |
1394 | +#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\ | |
1395 | + SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dir_inode_header));\ | |
1396 | + SQUASHFS_SWAP((s)->file_size, d, 24, 19);\ | |
1397 | + SQUASHFS_SWAP((s)->offset, d, 43, 13);\ | |
1398 | + SQUASHFS_SWAP((s)->mtime, d, 56, 32);\ | |
1399 | + SQUASHFS_SWAP((s)->start_block, d, 88, 24);\ | |
1400 | +} | |
1401 | + | |
1402 | +#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\ | |
1403 | + SQUASHFS_MEMSET(s, d, sizeof(squashfs_dir_header));\ | |
1404 | + SQUASHFS_SWAP((s)->count, d, 0, 8);\ | |
1405 | + SQUASHFS_SWAP((s)->start_block, d, 8, 24);\ | |
1406 | +} | |
1407 | + | |
1408 | +#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\ | |
1409 | + SQUASHFS_MEMSET(s, d, sizeof(squashfs_dir_entry));\ | |
1410 | + SQUASHFS_SWAP((s)->offset, d, 0, 13);\ | |
1411 | + SQUASHFS_SWAP((s)->type, d, 13, 3);\ | |
1412 | + SQUASHFS_SWAP((s)->size, d, 16, 8);\ | |
1413 | +} | |
1414 | + | |
1415 | +#define SQUASHFS_SWAP_SHORTS(s, d, n) {\ | |
1416 | + int entry;\ | |
1417 | + int bit_position;\ | |
1418 | + SQUASHFS_MEMSET(s, d, n * 2);\ | |
1419 | + for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += 16)\ | |
1420 | + SQUASHFS_SWAP(s[entry], d, bit_position, 16);\ | |
1421 | +} | |
1422 | + | |
1423 | +#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\ | |
1424 | + int entry;\ | |
1425 | + int bit_position;\ | |
1426 | + SQUASHFS_MEMSET(s, d, n * bits / 8);\ | |
1427 | + for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += bits)\ | |
1428 | + SQUASHFS_SWAP(s[entry], d, bit_position, bits);\ | |
1429 | +} | |
1430 | + | |
1431 | +#ifdef __KERNEL__ | |
1432 | +/* | |
1433 | + * macros used to swap each structure entry, taking into account | |
1434 | + * bitfields and different bitfield placing conventions on differing architectures | |
1435 | + */ | |
1436 | +#include <asm/byteorder.h> | |
1437 | +#ifdef __BIG_ENDIAN | |
1438 | + /* convert from little endian to big endian */ | |
1439 | +#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, b_pos) | |
1440 | +#else | |
1441 | + /* convert from big endian to little endian */ | |
1442 | +#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, 64 - tbits - b_pos) | |
1443 | +#endif | |
1444 | + | |
1445 | +#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\ | |
1446 | + int bits;\ | |
1447 | + int b_pos = pos % 8;\ | |
1448 | + unsigned long long val = 0;\ | |
1449 | + unsigned char *s = (unsigned char *)p + (pos / 8);\ | |
1450 | + unsigned char *d = ((unsigned char *) &val) + 7;\ | |
1451 | + for(bits = 0; bits < (tbits + b_pos); bits += 8) \ | |
1452 | + *d-- = *s++;\ | |
1453 | + value = (val >> (SHIFT));\ | |
1454 | +} | |
1455 | +#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n); | |
1456 | +#endif | |
1457 | +#endif | |
1458 | diff --new-file -ur linux-2.6.1/include/linux/squashfs_fs_i.h linux-2.6.1-squashfs1.3r3/include/linux/squashfs_fs_i.h | |
1459 | --- linux-2.6.1/include/linux/squashfs_fs_i.h 1970-01-01 01:00:00.000000000 +0100 | |
1460 | +++ linux-2.6.1-squashfs1.3r3/include/linux/squashfs_fs_i.h 2004-01-17 23:44:35.000000000 +0000 | |
1461 | @@ -0,0 +1,22 @@ | |
1462 | +#ifndef SQUASHFS_FS_I | |
1463 | +#define SQUASHFS_FS_I | |
1464 | +/* | |
1465 | + * Squashfs | |
1466 | + * | |
1467 | + * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk> | |
1468 | + * | |
1469 | + * This program is free software; you can redistribute it and/or | |
1470 | + * modify it under the terms of the GNU General Public License | |
1471 | + * as published by the Free Software Foundation; either version | |
1472 | + * 2 of the License, or (at your option) any later version. | |
1473 | + * | |
1474 | + * squashfs_fs_i.h | |
1475 | + */ | |
1476 | + | |
1477 | +typedef struct squashfs_inode_info { | |
1478 | + unsigned int start_block; | |
1479 | + unsigned int block_list_start; | |
1480 | + unsigned int offset; | |
1481 | + struct inode vfs_inode; | |
1482 | + } squashfs_inode_info; | |
1483 | +#endif | |
1484 | diff --new-file -ur linux-2.6.1/include/linux/squashfs_fs_sb.h linux-2.6.1-squashfs1.3r3/include/linux/squashfs_fs_sb.h | |
1485 | --- linux-2.6.1/include/linux/squashfs_fs_sb.h 1970-01-01 01:00:00.000000000 +0100 | |
1486 | +++ linux-2.6.1-squashfs1.3r3/include/linux/squashfs_fs_sb.h 2004-01-17 23:44:35.000000000 +0000 | |
1487 | @@ -0,0 +1,41 @@ | |
1488 | +#ifndef SQUASHFS_FS_SB | |
1489 | +#define SQUASHFS_FS_SB | |
1490 | +/* | |
1491 | + * Squashfs | |
1492 | + * | |
1493 | + * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk> | |
1494 | + * | |
1495 | + * This program is free software; you can redistribute it and/or | |
1496 | + * modify it under the terms of the GNU General Public License | |
1497 | + * as published by the Free Software Foundation; either version | |
1498 | + * 2 of the License, or (at your option) any later version. | |
1499 | + * | |
1500 | + * squashfs_fs_sb.h | |
1501 | + */ | |
1502 | + | |
1503 | +#include <linux/squashfs_fs.h> | |
1504 | + | |
1505 | +typedef struct { | |
1506 | + unsigned int block; | |
1507 | + int length; | |
1508 | + unsigned int next_index; | |
1509 | + char *data; | |
1510 | + } squashfs_cache; | |
1511 | + | |
1512 | +typedef struct squashfs_sb_info { | |
1513 | + squashfs_super_block sBlk; | |
1514 | + int devblksize; | |
1515 | + int devblksize_log2; | |
1516 | + int swap; | |
1517 | + squashfs_cache *block_cache; | |
1518 | + int next_cache; | |
1519 | + squashfs_uid *uid; | |
1520 | + squashfs_uid *guid; | |
1521 | + unsigned int read_size; | |
1522 | + char *read_data; | |
1523 | + char *read_page; | |
1524 | + struct semaphore read_page_mutex; | |
1525 | + struct semaphore block_cache_mutex; | |
1526 | + wait_queue_head_t waitq; | |
1527 | + } squashfs_sb_info; | |
1528 | +#endif |