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a38f4589 | 1 | diff -Naur linux-2.6.0-test1-ac2/fs/Kconfig linux-2.6.0-test1-ac2-sfs/fs/Kconfig |
2 | --- linux-2.6.0-test1-ac2/fs/Kconfig 2003-07-10 13:10:54.000000000 -0700 | |
3 | +++ linux-2.6.0-test1-ac2-sfs/fs/Kconfig 2003-07-20 01:36:53.000000000 -0700 | |
4 | @@ -1114,6 +1114,26 @@ | |
5 | ||
6 | If unsure, say N. | |
7 | ||
8 | +config SQUASHFS | |
9 | + tristate "Squashfs file system support" | |
10 | + help | |
11 | + Saying Y here includes support for Squashfs. Squashfs is a | |
12 | + highly compressed read-only filesystem for Linux. It uses zlib | |
13 | + compression to compress both files, inodes and directories. | |
14 | + Inodes in the system are very small and all blocks are packed | |
15 | + to minimise data overhead. Block sizes greater than 4K are | |
16 | + supported up to a maximum of 32K. | |
17 | + | |
18 | + See <http://squashfs.sourceforge.net/> for further information. | |
19 | + | |
20 | + If you want to compile this as a module ( = code which can be | |
21 | + inserted in and removed from the running kernel whenever you want), | |
22 | + say M here and read <file:Documentation/modules.txt>. The module | |
23 | + will be called squashfs. Note that the root file system (the one | |
24 | + containing the directory /) cannot be compiled as a module. | |
25 | + | |
26 | + If unsure, say N. | |
27 | + | |
28 | config VXFS_FS | |
29 | tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)" | |
30 | help | |
31 | diff -Naur linux-2.6.0-test1-ac2/fs/Makefile linux-2.6.0-test1-ac2-sfs/fs/Makefile | |
32 | --- linux-2.6.0-test1-ac2/fs/Makefile 2003-07-10 13:10:55.000000000 -0700 | |
33 | +++ linux-2.6.0-test1-ac2-sfs/fs/Makefile 2003-07-16 13:45:34.000000000 -0700 | |
34 | @@ -53,6 +53,7 @@ | |
35 | obj-$(CONFIG_JBD) += jbd/ | |
36 | obj-$(CONFIG_EXT2_FS) += ext2/ | |
37 | obj-$(CONFIG_CRAMFS) += cramfs/ | |
38 | +obj-$(CONFIG_SQUASHFS) += squashfs/ | |
39 | obj-$(CONFIG_RAMFS) += ramfs/ | |
40 | obj-$(CONFIG_HUGETLBFS) += hugetlbfs/ | |
41 | obj-$(CONFIG_CODA_FS) += coda/ | |
42 | diff -Naur linux-2.6.0-test1-ac2/fs/squashfs/Makefile linux-2.6.0-test1-ac2-sfs/fs/squashfs/Makefile | |
43 | --- linux-2.6.0-test1-ac2/fs/squashfs/Makefile 1969-12-31 16:00:00.000000000 -0800 | |
44 | +++ linux-2.6.0-test1-ac2-sfs/fs/squashfs/Makefile 2003-07-15 12:17:43.000000000 -0700 | |
45 | @@ -0,0 +1,8 @@ | |
46 | +# | |
47 | +# Makefile for the linux squashfs routines. | |
48 | +# | |
49 | + | |
50 | +obj-$(CONFIG_SQUASHFS) += squashfs.o | |
51 | + | |
52 | +squashfs-objs := inode.o | |
53 | + | |
54 | diff -Naur linux-2.6.0-test1-ac2/fs/squashfs/inode.c linux-2.6.0-test1-ac2-sfs/fs/squashfs/inode.c | |
55 | --- linux-2.6.0-test1-ac2/fs/squashfs/inode.c 1969-12-31 16:00:00.000000000 -0800 | |
56 | +++ linux-2.6.0-test1-ac2-sfs/fs/squashfs/inode.c 2003-07-20 02:08:01.000000000 -0700 | |
57 | @@ -0,0 +1,1045 @@ | |
58 | +/* | |
59 | + * Squashfs - a compressed read only filesystem for Linux | |
60 | + * | |
61 | + * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk> | |
62 | + * | |
63 | + * This program is free software; you can redistribute it and/or | |
64 | + * modify it under the terms of the GNU General Public License | |
65 | + * as published by the Free Software Foundation; either version | |
66 | + * 2 of the License, or (at your option) any later version. | |
67 | + * | |
68 | + * inode.c | |
69 | + */ | |
70 | + | |
71 | +#include <linux/types.h> | |
72 | +#include <linux/module.h> | |
73 | +#include <linux/errno.h> | |
74 | +#include <linux/slab.h> | |
75 | +#include <linux/fs.h> | |
76 | +#include <linux/init.h> | |
77 | +#include <linux/dcache.h> | |
78 | +#include <asm/uaccess.h> | |
79 | +#include <linux/wait.h> | |
80 | +#include <asm/semaphore.h> | |
81 | +#include <linux/zlib.h> | |
82 | +#include <linux/blkdev.h> | |
83 | +#include <linux/vmalloc.h> | |
84 | +#include <linux/smp_lock.h> | |
85 | +#include <linux/buffer_head.h> | |
86 | +#include <linux/squashfs_fs_sb.h> | |
87 | +#include <linux/vfs.h> | |
88 | + | |
89 | +#ifdef SQUASHFS_TRACE | |
90 | +#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args) | |
91 | +#else | |
92 | +#define TRACE(s, args...) {} | |
93 | +#endif | |
94 | + | |
95 | +#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args) | |
96 | + | |
97 | +#define SERROR(s, args...) if(!silent) printk(KERN_ERR "SQUASHFS error: "s, ## args) | |
98 | +#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args) | |
99 | + | |
100 | +typedef struct squashfs_inode_info { | |
101 | + unsigned int start_block; | |
102 | + unsigned int block_list_start; | |
103 | + unsigned int offset; | |
104 | + | |
105 | + struct inode vfs_inode; | |
106 | +} squashfs_inode_info; | |
107 | + | |
108 | +static inline struct squashfs_inode_info *SQUASH_I(struct inode *inode) | |
109 | +{ | |
110 | + return container_of(inode, struct squashfs_inode_info, vfs_inode); | |
111 | +} | |
112 | + | |
113 | +static int squashfs_fill_super(struct super_block *, void *, int); | |
114 | +static void squashfs_put_super(struct super_block *); | |
115 | +static int squashfs_statfs(struct super_block *, struct kstatfs *); | |
116 | +static int squashfs_symlink_readpage(struct file *file, struct page *page); | |
117 | +static int squashfs_readpage(struct file *file, struct page *page); | |
118 | +static int squashfs_readdir(struct file *, void *, filldir_t); | |
119 | +static struct dentry *squashfs_lookup(struct inode *, struct dentry *, struct nameidata *); | |
120 | +static unsigned int read_data(struct super_block *s, char *buffer, | |
121 | + unsigned int index, int length, unsigned int *next_index); | |
122 | +static int squashfs_get_cached_block(struct super_block *s, char *buffer, | |
123 | + unsigned int block, unsigned int offset, int length, | |
124 | + unsigned int *next_block, unsigned int *next_offset); | |
125 | +static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode); | |
126 | +static void squashfs_put_super(struct super_block *s); | |
127 | +static struct super_block *squashfs_get_sb(struct file_system_type *, int, const char *, void *); | |
128 | +static struct inode *squashfs_alloc_inode(struct super_block *); | |
129 | +static void squashfs_destroy_inode(struct inode *); | |
130 | + | |
131 | +DECLARE_MUTEX(read_data_mutex); | |
132 | + | |
133 | +static z_stream stream; | |
134 | + | |
135 | +static unsigned char squashfs_filetype_table[] = { | |
136 | + DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR | |
137 | +}; | |
138 | + | |
139 | +static struct super_operations squashfs_ops = { | |
140 | + .alloc_inode = squashfs_alloc_inode, | |
141 | + .destroy_inode = squashfs_destroy_inode, | |
142 | + .statfs = squashfs_statfs, | |
143 | + .put_super = squashfs_put_super, | |
144 | +}; | |
145 | + | |
146 | +static struct address_space_operations squashfs_symlink_aops = { | |
147 | + .readpage = squashfs_symlink_readpage | |
148 | +}; | |
149 | + | |
150 | +static struct address_space_operations squashfs_aops = { | |
151 | + .readpage = squashfs_readpage | |
152 | +}; | |
153 | + | |
154 | +static struct file_operations squashfs_dir_ops = { | |
155 | + .read = generic_read_dir, | |
156 | + .readdir = squashfs_readdir | |
157 | +}; | |
158 | + | |
159 | +static struct inode_operations squashfs_dir_inode_ops = { | |
160 | + .lookup = squashfs_lookup | |
161 | +}; | |
162 | + | |
163 | +static struct file_system_type squashfs_fs_type = { | |
164 | + .owner = THIS_MODULE, | |
165 | + .name = "squashfs", | |
166 | + .get_sb = squashfs_get_sb, | |
167 | + .kill_sb = kill_block_super, | |
168 | + .fs_flags = FS_REQUIRES_DEV, | |
169 | +}; | |
170 | + | |
171 | +static unsigned int read_data(struct super_block *s, char *buffer, | |
172 | + unsigned int index, int length, unsigned int *next_index) | |
173 | +{ | |
174 | + squashfs_sb_info *msBlk = s->s_fs_info; | |
175 | + struct buffer_head *bh[((SQUASHFS_FILE_MAX_SIZE - 1) >> msBlk->devblksize_log2) + 2]; | |
176 | + unsigned short c_byte; | |
177 | + unsigned int offset = index & ((1 << msBlk->devblksize_log2) - 1); | |
178 | + unsigned int cur_index = index >> msBlk->devblksize_log2; | |
179 | + int bytes, avail_bytes, b, k; | |
180 | + char *c_buffer; | |
181 | + unsigned int compressed; | |
182 | + | |
183 | + if(!(bh[0] = sb_bread(s, cur_index))) | |
184 | + goto read_failure; | |
185 | + | |
186 | + if(length) | |
187 | + c_byte = length; | |
188 | + else { | |
189 | + if(msBlk->devblksize - offset == 1) { | |
190 | + if(msBlk->swap) | |
191 | + ((unsigned char *) &c_byte)[1] = *((unsigned char *) (bh[0]->b_data + offset)); | |
192 | + else | |
193 | + ((unsigned char *) &c_byte)[0] = *((unsigned char *) (bh[0]->b_data + offset)); | |
194 | + brelse(bh[0]); | |
195 | + if(!(bh[0] = sb_bread(s, ++cur_index))) | |
196 | + goto read_failure; | |
197 | + if(msBlk->swap) | |
198 | + ((unsigned char *) &c_byte)[0] = *((unsigned char *) bh[0]->b_data); | |
199 | + else | |
200 | + ((unsigned char *) &c_byte)[1] = *((unsigned char *) bh[0]->b_data); | |
201 | + offset = 1; | |
202 | + } | |
203 | + else { | |
204 | + if(msBlk->swap) { | |
205 | + ((unsigned char *) &c_byte)[1] = *((unsigned char *) (bh[0]->b_data + offset)); | |
206 | + ((unsigned char *) &c_byte)[0] = *((unsigned char *) (bh[0]->b_data + offset + 1)); | |
207 | + } else | |
208 | + c_byte = *((unsigned short *) (bh[0]->b_data + offset)); | |
209 | + offset += 2; | |
210 | + } | |
211 | + if(SQUASHFS_CHECK_DATA(msBlk->sBlk.flags)) { | |
212 | + if(offset == msBlk->devblksize) { | |
213 | + brelse(bh[0]); | |
214 | + if(!(bh[0] = sb_bread(s, ++cur_index))) | |
215 | + goto read_failure; | |
216 | + offset = 0; | |
217 | + } | |
218 | + if(*((unsigned char *) (bh[0]->b_data + offset)) != SQUASHFS_MARKER_BYTE) { | |
219 | + ERROR("Metadata block marker corrupt @ %x\n", index); | |
220 | + brelse(bh[0]); | |
221 | + return 0; | |
222 | + } | |
223 | + offset ++; | |
224 | + } | |
225 | + } | |
226 | + | |
227 | + bytes = msBlk->devblksize - offset; | |
228 | + c_buffer = (compressed = SQUASHFS_COMPRESSED(c_byte)) ? msBlk->read_data : buffer; | |
229 | + c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte); | |
230 | + | |
231 | + TRACE("Block @ 0x%x, %scompressed size %d\n", index, compressed ? "" : "un", (unsigned int) c_byte); | |
232 | + | |
233 | + for(b = 1; bytes < c_byte; b++) { | |
234 | + if(!(bh[b] = sb_bread(s, ++cur_index))) | |
235 | + goto block_release; | |
236 | + bytes += msBlk->devblksize; | |
237 | + } | |
238 | + | |
239 | + if(compressed) | |
240 | + down(&read_data_mutex); | |
241 | + | |
242 | + for(bytes = 0, k = 0; k < b; k++) { | |
243 | + avail_bytes = (c_byte - bytes) > (msBlk->devblksize - offset) ? msBlk->devblksize - offset : c_byte - bytes; | |
244 | + memcpy(c_buffer + bytes, bh[k]->b_data + offset, avail_bytes); | |
245 | + bytes += avail_bytes; | |
246 | + offset = 0; | |
247 | + brelse(bh[k]); | |
248 | + } | |
249 | + | |
250 | + /* | |
251 | + * uncompress block | |
252 | + */ | |
253 | + if(compressed) { | |
254 | + int zlib_err; | |
255 | + | |
256 | + stream.next_in = c_buffer; | |
257 | + stream.avail_in = c_byte; | |
258 | + stream.next_out = buffer; | |
259 | + stream.avail_out = msBlk->read_size; | |
260 | + if(((zlib_err = zlib_inflateInit(&stream)) != Z_OK) || | |
261 | + ((zlib_err = zlib_inflate(&stream, Z_FINISH)) != Z_STREAM_END) || | |
262 | + ((zlib_err = zlib_inflateEnd(&stream)) != Z_OK)) { | |
263 | + ERROR("zlib_fs returned unexpected result 0x%x\n", zlib_err); | |
264 | + bytes = 0; | |
265 | + } else | |
266 | + bytes = stream.total_out; | |
267 | + up(&read_data_mutex); | |
268 | + } | |
269 | + | |
270 | + if(next_index) | |
271 | + *next_index = index + c_byte + (length ? 0 : (SQUASHFS_CHECK_DATA(msBlk->sBlk.flags) ? 3 : 2)); | |
272 | + | |
273 | + return bytes; | |
274 | + | |
275 | +block_release: | |
276 | + while(--b >= 0) brelse(bh[b]); | |
277 | + | |
278 | +read_failure: | |
279 | + ERROR("sb_bread failed reading block 0x%x\n", cur_index); | |
280 | + return 0; | |
281 | +} | |
282 | + | |
283 | + | |
284 | +static int squashfs_get_cached_block(struct super_block *s, char *buffer, | |
285 | + unsigned int block, unsigned int offset, int length, | |
286 | + unsigned int *next_block, unsigned int *next_offset) | |
287 | +{ | |
288 | + squashfs_sb_info *msBlk = s->s_fs_info; | |
289 | + int n, i, bytes, return_length = length; | |
290 | + unsigned int next_index; | |
291 | + | |
292 | + TRACE("Entered squashfs_get_cached_block [%x:%x]\n", block, offset); | |
293 | + | |
294 | + for(;;) { | |
295 | + for(i = 0; i < SQUASHFS_CACHED_BLKS; i++) | |
296 | + if(msBlk->block_cache[i].block == block) | |
297 | + break; | |
298 | + | |
299 | + down(&msBlk->block_cache_mutex); | |
300 | + if(i == SQUASHFS_CACHED_BLKS) { | |
301 | + /* read inode header block */ | |
302 | + for(i = msBlk->next_cache, n = SQUASHFS_CACHED_BLKS; n ; n --, i = (i + 1) % SQUASHFS_CACHED_BLKS) | |
303 | + if(msBlk->block_cache[i].block != SQUASHFS_USED_BLK) | |
304 | + break; | |
305 | + if(n == 0) { | |
306 | + up(&msBlk->block_cache_mutex); | |
307 | + sleep_on(&msBlk->waitq); | |
308 | + continue; | |
309 | + } | |
310 | + msBlk->next_cache = (i + 1) % SQUASHFS_CACHED_BLKS; | |
311 | + | |
312 | + if(msBlk->block_cache[i].block == SQUASHFS_INVALID_BLK) { | |
313 | + if(!(msBlk->block_cache[i].data = (unsigned char *) | |
314 | + kmalloc(SQUASHFS_METADATA_SIZE, GFP_KERNEL))) { | |
315 | + ERROR("Failed to allocate cache block\n"); | |
316 | + up(&msBlk->block_cache_mutex); | |
317 | + return 0; | |
318 | + } | |
319 | + } | |
320 | + | |
321 | + msBlk->block_cache[i].block = SQUASHFS_USED_BLK; | |
322 | + up(&msBlk->block_cache_mutex); | |
323 | + if(!(msBlk->block_cache[i].length = read_data(s, msBlk->block_cache[i].data, block, 0, | |
324 | + &next_index))) { | |
325 | + ERROR("Unable to read cache block [%x:%x]\n", block, offset); | |
326 | + return 0; | |
327 | + } | |
328 | + down(&msBlk->block_cache_mutex); | |
329 | + wake_up(&msBlk->waitq); | |
330 | + msBlk->block_cache[i].block = block; | |
331 | + msBlk->block_cache[i].next_index = next_index; | |
332 | + TRACE("Read cache block [%x:%x]\n", block, offset); | |
333 | + } | |
334 | + | |
335 | + if(msBlk->block_cache[i].block != block) { | |
336 | + up(&msBlk->block_cache_mutex); | |
337 | + continue; | |
338 | + } | |
339 | + | |
340 | + if((bytes = msBlk->block_cache[i].length - offset) >= length) { | |
341 | + memcpy(buffer, msBlk->block_cache[i].data + offset, length); | |
342 | + if(msBlk->block_cache[i].length - offset == length) { | |
343 | + *next_block = msBlk->block_cache[i].next_index; | |
344 | + *next_offset = 0; | |
345 | + } else { | |
346 | + *next_block = block; | |
347 | + *next_offset = offset + length; | |
348 | + } | |
349 | + | |
350 | + up(&msBlk->block_cache_mutex); | |
351 | + return return_length; | |
352 | + } else { | |
353 | + memcpy(buffer, msBlk->block_cache[i].data + offset, bytes); | |
354 | + block = msBlk->block_cache[i].next_index; | |
355 | + up(&msBlk->block_cache_mutex); | |
356 | + length -= bytes; | |
357 | + offset = 0; | |
358 | + buffer += bytes; | |
359 | + } | |
360 | + } | |
361 | +} | |
362 | + | |
363 | + | |
364 | +static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode) | |
365 | +{ | |
366 | + struct inode *i = new_inode(s); | |
367 | + struct squashfs_inode_info *sqi = SQUASH_I(i); | |
368 | + squashfs_sb_info *msBlk = s->s_fs_info; | |
369 | + squashfs_super_block *sBlk = &msBlk->sBlk; | |
370 | + unsigned int block = SQUASHFS_INODE_BLK(inode) + sBlk->inode_table_start; | |
371 | + unsigned int offset = SQUASHFS_INODE_OFFSET(inode); | |
372 | + unsigned int next_block, next_offset; | |
373 | + squashfs_base_inode_header inodeb; | |
374 | + | |
375 | + TRACE("Entered squashfs_iget\n"); | |
376 | + | |
377 | + if(msBlk->swap) { | |
378 | + squashfs_base_inode_header sinodeb; | |
379 | + | |
380 | + if(!squashfs_get_cached_block(s, (char *) &sinodeb, block, offset, | |
381 | + sizeof(sinodeb), &next_block, &next_offset)) | |
382 | + goto failed_read; | |
383 | + SQUASHFS_SWAP_BASE_INODE_HEADER(&inodeb, &sinodeb, sizeof(sinodeb)); | |
384 | + } else | |
385 | + if(!squashfs_get_cached_block(s, (char *) &inodeb, block, offset, | |
386 | + sizeof(inodeb), &next_block, &next_offset)) | |
387 | + goto failed_read; | |
388 | + | |
389 | + i->i_nlink = 1; | |
390 | + | |
391 | + i->i_mtime.tv_sec = sBlk->mkfs_time; | |
392 | + i->i_atime.tv_sec = sBlk->mkfs_time; | |
393 | + i->i_ctime.tv_sec = sBlk->mkfs_time; | |
394 | + i->i_mtime.tv_nsec = i->i_atime.tv_nsec = i->i_ctime.tv_nsec = 0; | |
395 | + i->i_uid = msBlk->uid[((inodeb.inode_type - 1) / SQUASHFS_TYPES) * 16 + inodeb.uid]; | |
396 | + i->i_ino = SQUASHFS_MK_VFS_INODE(block - sBlk->inode_table_start, offset); | |
397 | + | |
398 | + if(inodeb.guid == SQUASHFS_GUIDS) | |
399 | + i->i_gid = i->i_uid; | |
400 | + else | |
401 | + i->i_gid = msBlk->guid[inodeb.guid]; | |
402 | + | |
403 | + i->i_mode = inodeb.mode; | |
404 | + | |
405 | + switch((inodeb.inode_type - 1) % SQUASHFS_TYPES + 1) { | |
406 | + case SQUASHFS_FILE_TYPE: { | |
407 | + squashfs_reg_inode_header inodep; | |
408 | + | |
409 | + if(msBlk->swap) { | |
410 | + squashfs_reg_inode_header sinodep; | |
411 | + | |
412 | + if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep), | |
413 | + &next_block, &next_offset)) | |
414 | + goto failed_read; | |
415 | + SQUASHFS_SWAP_REG_INODE_HEADER(&inodep, &sinodep); | |
416 | + } else | |
417 | + if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep), | |
418 | + &next_block, &next_offset)) | |
419 | + goto failed_read; | |
420 | + | |
421 | + i->i_size = inodep.file_size; | |
422 | + i->i_fop = &generic_ro_fops; | |
423 | + i->i_data.a_ops = &squashfs_aops; | |
424 | + i->i_mode |= S_IFREG; | |
425 | + | |
426 | + i->i_mtime.tv_sec = inodep.mtime; | |
427 | + i->i_atime.tv_sec = inodep.mtime; | |
428 | + i->i_ctime.tv_sec = inodep.mtime; | |
429 | + i->i_mtime.tv_nsec = i->i_atime.tv_nsec = | |
430 | + i->i_ctime.tv_nsec = 0; | |
431 | + sqi->start_block = inodep.start_block; | |
432 | + sqi->block_list_start = next_block; | |
433 | + sqi->offset = next_offset; | |
434 | + TRACE("File inode %x:%x, start_block %x, block_list_start %x, offset %x\n", | |
435 | + SQUASHFS_INODE_BLK(inode), offset, inodep.start_block, next_block, next_offset); | |
436 | + break; | |
437 | + } | |
438 | + case SQUASHFS_DIR_TYPE: { | |
439 | + squashfs_dir_inode_header inodep; | |
440 | + | |
441 | + if(msBlk->swap) { | |
442 | + squashfs_dir_inode_header sinodep; | |
443 | + | |
444 | + if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep), | |
445 | + &next_block, &next_offset)) | |
446 | + goto failed_read; | |
447 | + SQUASHFS_SWAP_DIR_INODE_HEADER(&inodep, &sinodep); | |
448 | + } else | |
449 | + if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep), | |
450 | + &next_block, &next_offset)) | |
451 | + goto failed_read; | |
452 | + | |
453 | + i->i_size = inodep.file_size; | |
454 | + i->i_op = &squashfs_dir_inode_ops; | |
455 | + i->i_fop = &squashfs_dir_ops; | |
456 | + i->i_mode |= S_IFDIR; | |
457 | + i->i_mtime.tv_sec = inodep.mtime; | |
458 | + i->i_atime.tv_sec = inodep.mtime; | |
459 | + i->i_ctime.tv_sec = inodep.mtime; | |
460 | + i->i_mtime.tv_nsec = i->i_atime.tv_nsec = | |
461 | + i->i_ctime.tv_nsec = 0; | |
462 | + sqi->start_block = inodep.start_block; | |
463 | + sqi->offset = inodep.offset; | |
464 | + TRACE("Directory inode %x:%x, start_block %x, offset %x\n", SQUASHFS_INODE_BLK(inode), offset, | |
465 | + inodep.start_block, inodep.offset); | |
466 | + break; | |
467 | + } | |
468 | + case SQUASHFS_SYMLINK_TYPE: { | |
469 | + squashfs_symlink_inode_header inodep; | |
470 | + | |
471 | + if(msBlk->swap) { | |
472 | + squashfs_symlink_inode_header sinodep; | |
473 | + | |
474 | + if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep), | |
475 | + &next_block, &next_offset)) | |
476 | + goto failed_read; | |
477 | + SQUASHFS_SWAP_SYMLINK_INODE_HEADER(&inodep, &sinodep); | |
478 | + } else | |
479 | + if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep), | |
480 | + &next_block, &next_offset)) | |
481 | + goto failed_read; | |
482 | + | |
483 | + i->i_size = inodep.symlink_size; | |
484 | + i->i_op = &page_symlink_inode_operations; | |
485 | + i->i_data.a_ops = &squashfs_symlink_aops; | |
486 | + i->i_mode |= S_IFLNK; | |
487 | + sqi->start_block = next_block; | |
488 | + sqi->offset = next_offset; | |
489 | + TRACE("Symbolic link inode %x:%x, start_block %x, offset %x\n", | |
490 | + SQUASHFS_INODE_BLK(inode), offset, next_block, next_offset); | |
491 | + break; | |
492 | + } | |
493 | + case SQUASHFS_BLKDEV_TYPE: | |
494 | + case SQUASHFS_CHRDEV_TYPE: { | |
495 | + squashfs_dev_inode_header inodep; | |
496 | + | |
497 | + if(msBlk->swap) { | |
498 | + squashfs_dev_inode_header sinodep; | |
499 | + | |
500 | + if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep), | |
501 | + &next_block, &next_offset)) | |
502 | + goto failed_read; | |
503 | + SQUASHFS_SWAP_DEV_INODE_HEADER(&inodep, &sinodep); | |
504 | + } else | |
505 | + if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep), | |
506 | + &next_block, &next_offset)) | |
507 | + goto failed_read; | |
508 | + | |
509 | + i->i_size = 0; | |
510 | + i->i_mode |= (inodeb.inode_type == SQUASHFS_CHRDEV_TYPE) ? S_IFCHR : S_IFBLK; | |
511 | + init_special_inode(i, i->i_mode, inodep.rdev); | |
512 | + TRACE("Device inode %x:%x, rdev %x\n", SQUASHFS_INODE_BLK(inode), offset, inodep.rdev); | |
513 | + break; | |
514 | + } | |
515 | + default: | |
516 | + ERROR("Unknown inode type %d in squashfs_iget!\n", inodeb.inode_type); | |
517 | + goto failed_read1; | |
518 | + } | |
519 | + | |
520 | + return i; | |
521 | + | |
522 | +failed_read: | |
523 | + ERROR("Unable to read inode [%x:%x]\n", block, offset); | |
524 | + | |
525 | +failed_read1: | |
526 | + return NULL; | |
527 | +} | |
528 | + | |
529 | + | |
530 | +static int squashfs_fill_super(struct super_block *s, void *data, int silent) | |
531 | +{ | |
532 | + char bbuf[BDEVNAME_SIZE]; | |
533 | + squashfs_sb_info *msBlk; | |
534 | + squashfs_super_block *sBlk; | |
535 | + int i; | |
536 | + | |
537 | + TRACE("Entered squashfs_fill_super\n"); | |
538 | + | |
539 | + msBlk = kmalloc(sizeof(squashfs_sb_info), GFP_KERNEL); | |
540 | + if (!msBlk) | |
541 | + return -ENOMEM; | |
542 | + s->s_fs_info = msBlk; | |
543 | + sBlk = &(msBlk->sBlk); | |
544 | + memset(msBlk, 0, sizeof(squashfs_sb_info)); | |
545 | + | |
546 | + msBlk->devblksize = sb_min_blocksize(s, BLOCK_SIZE); | |
547 | + msBlk->devblksize_log2 = ffz(~msBlk->devblksize); | |
548 | + | |
549 | + init_MUTEX(&msBlk->read_page_mutex); | |
550 | + init_MUTEX(&msBlk->block_cache_mutex); | |
551 | + | |
552 | + init_waitqueue_head(&msBlk->waitq); | |
553 | + | |
554 | + if(!read_data(s, (char *) sBlk, SQUASHFS_START, sizeof(squashfs_super_block) | SQUASHFS_COMPRESSED_BIT, NULL)) { | |
555 | + SERROR("unable to read superblock\n"); | |
556 | + goto failed_mount; | |
557 | + } | |
558 | + | |
559 | + /* Check it is a SQUASHFS superblock */ | |
560 | + msBlk->swap = 0; | |
561 | + if((s->s_magic = sBlk->s_magic) != SQUASHFS_MAGIC) { | |
562 | + if(sBlk->s_magic == SQUASHFS_MAGIC_SWAP) { | |
563 | + squashfs_super_block sblk; | |
564 | + WARNING("Mounting a different endian SQUASHFS filesystem on %s\n", __bdevname(s->s_dev, bbuf)); | |
565 | + SQUASHFS_SWAP_SUPER_BLOCK(&sblk, sBlk); | |
566 | + memcpy(sBlk, &sblk, sizeof(squashfs_super_block)); | |
567 | + msBlk->swap = 1; | |
568 | + } else { | |
569 | + SERROR("Can't find a SQUASHFS superblock on %s\n", __bdevname(s->s_dev, bbuf)); | |
570 | + goto failed_mount; | |
571 | + } | |
572 | + } | |
573 | + | |
574 | + /* Check the MAJOR & MINOR versions */ | |
575 | + if(sBlk->s_major != SQUASHFS_MAJOR || sBlk->s_minor > SQUASHFS_MINOR) { | |
576 | + SERROR("Major/Minor mismatch, filesystem is (%d:%d), I support (%d: <= %d)\n", | |
577 | + sBlk->s_major, sBlk->s_minor, SQUASHFS_MAJOR, SQUASHFS_MINOR); | |
578 | + goto failed_mount; | |
579 | + } | |
580 | + | |
581 | + TRACE("Found valid superblock on %s\n", __bdevname(s->s_dev, bbuf)); | |
582 | + TRACE("Inodes are %scompressed\n", SQUASHFS_UNCOMPRESSED_INODES(sBlk->flags) ? "un" : ""); | |
583 | + TRACE("Data is %scompressed\n", SQUASHFS_UNCOMPRESSED_DATA(sBlk->flags) ? "un" : ""); | |
584 | + TRACE("Check data is %s present in the filesystem\n", SQUASHFS_CHECK_DATA(sBlk->flags) ? "" : "not"); | |
585 | + TRACE("Filesystem size %d bytes\n", sBlk->bytes_used); | |
586 | + TRACE("Block size %d\n", sBlk->block_size); | |
587 | + TRACE("Number of inodes %d\n", sBlk->inodes); | |
588 | + TRACE("Number of uids %d\n", sBlk->no_uids); | |
589 | + TRACE("Number of gids %d\n", sBlk->no_guids); | |
590 | + TRACE("sBlk->inode_table_start %x\n", sBlk->inode_table_start); | |
591 | + TRACE("sBlk->directory_table_start %x\n", sBlk->directory_table_start); | |
592 | + TRACE("sBlk->uid_start %x\n", sBlk->uid_start); | |
593 | + | |
594 | + s->s_flags |= MS_RDONLY; | |
595 | + s->s_op = &squashfs_ops; | |
596 | + | |
597 | + /* Init inode_table block pointer array */ | |
598 | + if(!(msBlk->block_cache = (squashfs_cache *) kmalloc(sizeof(squashfs_cache) * SQUASHFS_CACHED_BLKS, GFP_KERNEL))) { | |
599 | + ERROR("Failed to allocate block cache\n"); | |
600 | + goto failed_mount; | |
601 | + } | |
602 | + | |
603 | + for(i = 0; i < SQUASHFS_CACHED_BLKS; i++) | |
604 | + msBlk->block_cache[i].block = SQUASHFS_INVALID_BLK; | |
605 | + | |
606 | + msBlk->next_cache = 0; | |
607 | + | |
608 | + /* Allocate read_data block */ | |
609 | + msBlk->read_size = (sBlk->block_size < SQUASHFS_METADATA_SIZE) ? SQUASHFS_METADATA_SIZE : sBlk->block_size; | |
610 | + if(!(msBlk->read_data = (char *) kmalloc(msBlk->read_size, GFP_KERNEL))) { | |
611 | + ERROR("Failed to allocate read_data block\n"); | |
612 | + goto failed_mount1; | |
613 | + } | |
614 | + | |
615 | + /* Allocate read_page block */ | |
616 | + if(sBlk->block_size > PAGE_CACHE_SIZE && | |
617 | + !(msBlk->read_page = (char *) kmalloc(sBlk->block_size, GFP_KERNEL))) { | |
618 | + ERROR("Failed to allocate read_page block\n"); | |
619 | + goto failed_mount2; | |
620 | + } | |
621 | + | |
622 | + /* Allocate uid and gid tables */ | |
623 | + if(!(msBlk->uid = (squashfs_uid *) kmalloc((sBlk->no_uids + | |
624 | + sBlk->no_guids) * sizeof(squashfs_uid), GFP_KERNEL))) { | |
625 | + ERROR("Failed to allocate uid/gid table\n"); | |
626 | + goto failed_mount3; | |
627 | + } | |
628 | + msBlk->guid = msBlk->uid + sBlk->no_uids; | |
629 | + | |
630 | + if(msBlk->swap) { | |
631 | + squashfs_uid suid[sBlk->no_uids + sBlk->no_guids]; | |
632 | + | |
633 | + if(!read_data(s, (char *) &suid, sBlk->uid_start, ((sBlk->no_uids + sBlk->no_guids) * | |
634 | + sizeof(squashfs_uid)) | SQUASHFS_COMPRESSED_BIT, NULL)) { | |
635 | + SERROR("unable to read uid/gid table\n"); | |
636 | + goto failed_mount4; | |
637 | + } | |
638 | + SQUASHFS_SWAP_DATA(msBlk->uid, suid, (sBlk->no_uids + sBlk->no_guids), (sizeof(squashfs_uid) * 8)); | |
639 | + } else | |
640 | + if(!read_data(s, (char *) msBlk->uid, sBlk->uid_start, ((sBlk->no_uids + sBlk->no_guids) * | |
641 | + sizeof(squashfs_uid)) | SQUASHFS_COMPRESSED_BIT, NULL)) { | |
642 | + SERROR("unable to read uid/gid table\n"); | |
643 | + goto failed_mount4; | |
644 | + } | |
645 | + | |
646 | + if(!(s->s_root = d_alloc_root(squashfs_iget(s, sBlk->root_inode)))) { | |
647 | + ERROR("Root inode create failed\n"); | |
648 | + goto failed_mount4; | |
649 | + } | |
650 | + | |
651 | + TRACE("Leaving squashfs_fill_super\n"); | |
652 | + return 0; | |
653 | + | |
654 | +failed_mount4: | |
655 | + kfree(msBlk->uid); | |
656 | +failed_mount3: | |
657 | + kfree(msBlk->read_page); | |
658 | +failed_mount2: | |
659 | + kfree(msBlk->read_data); | |
660 | +failed_mount1: | |
661 | + kfree(msBlk->block_cache); | |
662 | +failed_mount: | |
663 | + kfree(msBlk); | |
664 | + s->s_fs_info = NULL; | |
665 | + return -EINVAL; | |
666 | +} | |
667 | + | |
668 | + | |
669 | +static int squashfs_statfs(struct super_block *s, struct kstatfs *buf) | |
670 | +{ | |
671 | + squashfs_super_block *sBlk = &((squashfs_sb_info*)(s->s_fs_info))->sBlk; | |
672 | + | |
673 | + TRACE("Entered squashfs_statfs\n"); | |
674 | + buf->f_type = SQUASHFS_MAGIC; | |
675 | + buf->f_bsize = sBlk->block_size; | |
676 | + buf->f_blocks = ((sBlk->bytes_used - 1) >> sBlk->block_log) + 1; | |
677 | + buf->f_bfree = buf->f_bavail = 0; | |
678 | + buf->f_files = sBlk->inodes; | |
679 | + buf->f_ffree = 0; | |
680 | + buf->f_namelen = SQUASHFS_NAME_LEN; | |
681 | + return 0; | |
682 | +} | |
683 | + | |
684 | + | |
685 | +static int squashfs_symlink_readpage(struct file *file, struct page *page) | |
686 | +{ | |
687 | + struct inode *inode = page->mapping->host; | |
688 | + struct squashfs_inode_info *sqi = SQUASH_I(inode); | |
689 | + int index = page->index << PAGE_CACHE_SHIFT, length = 0, bytes; | |
690 | + int block = sqi->start_block; | |
691 | + int offset = sqi->offset; | |
692 | + char *buffer; | |
693 | + | |
694 | + TRACE("Entered squashfs_symlink_readpage, page index %d, start block %x, offset %x\n", | |
695 | + page->index, sqi->start_block, sqi->offset); | |
696 | + | |
697 | + if (! (buffer = kmalloc(PAGE_CACHE_SIZE, GFP_KERNEL))) { | |
698 | + ERROR("Failed to allocate symblic link buffer\n"); | |
699 | + return 0; | |
700 | + } | |
701 | + | |
702 | + while(length < index) { | |
703 | + if(length += bytes = squashfs_get_cached_block(inode->i_sb, buffer, block, offset, | |
704 | + PAGE_CACHE_SIZE, &block, &offset), !bytes) { | |
705 | + ERROR("Unable to read symbolic link [%x:%x]\n", block, offset); | |
706 | + goto skip_read; | |
707 | + } | |
708 | + } | |
709 | + | |
710 | + if(length != index) { | |
711 | + ERROR("(squashfs_symlink_readpage) length != index\n"); | |
712 | + kfree(buffer); | |
713 | + return 0; | |
714 | + } | |
715 | + | |
716 | + bytes = (inode->i_size - length) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : inode->i_size - length; | |
717 | + if(!squashfs_get_cached_block(inode->i_sb, page_address(page), block, offset, bytes, &block, &offset)) | |
718 | + ERROR("Unable to read symbolic link [%x:%x]\n", block, offset); | |
719 | + | |
720 | +skip_read: | |
721 | + kfree(buffer); | |
722 | + memset(page_address(page) + bytes, 0, PAGE_CACHE_SIZE - bytes); | |
723 | + flush_dcache_page(page); | |
724 | + SetPageUptodate(page); | |
725 | + unlock_page(page); | |
726 | + | |
727 | + return 0; | |
728 | +} | |
729 | + | |
730 | + | |
731 | +#define SIZE 1024 | |
732 | +static int squashfs_readpage(struct file *file, struct page *page) | |
733 | +{ | |
734 | + struct inode *inode = page->mapping->host; | |
735 | + struct squashfs_inode_info *sqi = SQUASH_I(inode); | |
736 | + squashfs_sb_info *msBlk = inode->i_sb->s_fs_info; | |
737 | + squashfs_super_block *sBlk = &msBlk->sBlk; | |
738 | + unsigned short *block_listp; | |
739 | + int index = sBlk->block_log > PAGE_CACHE_SHIFT ? | |
740 | + page->index >> (sBlk->block_log - PAGE_CACHE_SHIFT) : | |
741 | + page->index << (PAGE_CACHE_SHIFT - sBlk->block_log); | |
742 | + int block = sqi->start_block, i = 0; | |
743 | + int bytes = sqi->block_list_start; | |
744 | + int offset = sqi->offset; | |
745 | + int file_blocks = ((inode->i_size - 1) >> sBlk->block_log) + 1; | |
746 | + char *block_list; | |
747 | + char *sblock_list; | |
748 | + | |
749 | + TRACE("Entered squashfs_readpage, page index %d, start block %x\n", page->index, | |
750 | + sqi->start_block); | |
751 | + | |
752 | + if (msBlk->swap) { | |
753 | + block_list = kmalloc(SIZE, GFP_KERNEL); | |
754 | + sblock_list = kmalloc(SIZE, GFP_KERNEL); | |
755 | + if (! (block_list && sblock_list)) { | |
756 | + ERROR("Unable to allocate readpage buffer\n"); | |
757 | + goto skip_read; | |
758 | + } | |
759 | + } | |
760 | + else { | |
761 | + sblock_list = 0; | |
762 | + if (! (block_list = kmalloc(SIZE, GFP_KERNEL))) { | |
763 | + ERROR("Unable to allocate readpage buffer\n"); | |
764 | + goto skip_read; | |
765 | + } | |
766 | + } | |
767 | + | |
768 | + if(index > file_blocks) | |
769 | + goto skip_read; | |
770 | + | |
771 | + for(;;) { | |
772 | + int blocks = (index + 1 - i) > (SIZE >> 1) ? SIZE >> 1 : (index + 1 - i); | |
773 | + if(msBlk->swap) { | |
774 | + if(!squashfs_get_cached_block(inode->i_sb, sblock_list, bytes, offset, blocks << 1, &bytes, &offset)) { | |
775 | + ERROR("Unable to read block list [%d:%x]\n", bytes, offset); | |
776 | + goto skip_read; | |
777 | + } | |
778 | + SQUASHFS_SWAP_SHORTS(((unsigned short *)block_list), ((unsigned short *)sblock_list), blocks); | |
779 | + } else | |
780 | + if(!squashfs_get_cached_block(inode->i_sb, block_list, bytes, offset, blocks << 1, &bytes, &offset)) { | |
781 | + ERROR("Unable to read block list [%d:%x]\n", bytes, offset); | |
782 | + goto skip_read; | |
783 | + } | |
784 | + for(block_listp = (unsigned short *) block_list; i < index && blocks; i ++, block_listp ++, blocks --) | |
785 | + block += SQUASHFS_COMPRESSED_SIZE(*block_listp); | |
786 | + if(blocks) | |
787 | + break; | |
788 | + } | |
789 | + | |
790 | + if(sBlk->block_log > PAGE_CACHE_SHIFT) { | |
791 | + int mask = (1 << (sBlk->block_log - PAGE_CACHE_SHIFT)) - 1; | |
792 | + int start_index = page->index & ~mask; | |
793 | + int end_index = start_index | mask; | |
794 | + int byte_offset = 0; | |
795 | + | |
796 | + down(&msBlk->read_page_mutex); | |
797 | + if(!(bytes = read_data(inode->i_sb, msBlk->read_page, block, *block_listp, NULL))) { | |
798 | + ERROR("Unable to read page, block %x, size %x\n", block, (int) *block_listp); | |
799 | + goto skip_read; | |
800 | + } | |
801 | + | |
802 | + for(i = start_index; i <= end_index && byte_offset < bytes; i++, byte_offset += PAGE_CACHE_SIZE) { | |
803 | + int available_bytes = (bytes - byte_offset) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : bytes - byte_offset; | |
804 | + | |
805 | + TRACE("bytes %d, i %d, byte_offset %d, available_bytes %d\n", bytes, i, byte_offset, available_bytes); | |
806 | + | |
807 | + if(i == page->index) { | |
808 | + memcpy(page_address(page), msBlk->read_page + byte_offset, available_bytes); | |
809 | + memset(page_address(page) + available_bytes, 0, PAGE_CACHE_SIZE - available_bytes); | |
810 | + flush_dcache_page(page); | |
811 | + SetPageUptodate(page); | |
812 | + unlock_page(page); | |
813 | + } else { | |
814 | + struct page *push_page; | |
815 | + | |
816 | + if((push_page = grab_cache_page_nowait(page->mapping, i))) { | |
817 | + memcpy(page_address(push_page), msBlk->read_page + byte_offset, available_bytes); | |
818 | + memset(page_address(push_page) + available_bytes, 0, PAGE_CACHE_SIZE - available_bytes); | |
819 | + flush_dcache_page(push_page); | |
820 | + SetPageUptodate(push_page); | |
821 | + unlock_page(push_page); | |
822 | + page_cache_release(push_page); | |
823 | + } | |
824 | + } | |
825 | + } | |
826 | + up( &msBlk->read_page_mutex); | |
827 | + kfree(block_list); | |
828 | + kfree(sblock_list); | |
829 | + return 0; | |
830 | + | |
831 | + } else if(sBlk->block_log == PAGE_CACHE_SHIFT) { | |
832 | + if(!(bytes = read_data(inode->i_sb, page_address(page), block, *block_listp, NULL))) | |
833 | + ERROR("Unable to read page, block %x, size %x\n", block, (int) *block_listp); | |
834 | + | |
835 | + } else { | |
836 | + int i_end = index + (1 << (PAGE_CACHE_SHIFT - sBlk->block_log)); | |
837 | + char *p = (char *) page_address(page); | |
838 | + int byte; | |
839 | + | |
840 | + if(i_end > file_blocks) | |
841 | + i_end = file_blocks; | |
842 | + | |
843 | + while(index < i_end) { | |
844 | + if(!(byte = read_data(inode->i_sb, p, block, *block_listp, NULL))) { | |
845 | + ERROR("Unable to read page, block %x, size %x\n", block, (int) *block_listp); | |
846 | + goto skip_read; | |
847 | + } | |
848 | + block += SQUASHFS_COMPRESSED_SIZE(*block_listp); | |
849 | + p += byte; | |
850 | + bytes += byte; | |
851 | + index ++; | |
852 | + block_listp ++; | |
853 | + } | |
854 | + } | |
855 | + | |
856 | +skip_read: | |
857 | + kfree(block_list); | |
858 | + kfree(sblock_list); | |
859 | + memset(page_address(page) + bytes, 0, PAGE_CACHE_SIZE - bytes); | |
860 | + flush_dcache_page(page); | |
861 | + SetPageUptodate(page); | |
862 | + unlock_page(page); | |
863 | + | |
864 | + return 0; | |
865 | +} | |
866 | + | |
867 | + | |
868 | +static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir) | |
869 | +{ | |
870 | + struct inode *i = file->f_dentry->d_inode; | |
871 | + struct squashfs_inode_info *sqi = SQUASH_I(i); | |
872 | + squashfs_sb_info *msBlk = i->i_sb->s_fs_info; | |
873 | + squashfs_super_block *sBlk = &msBlk->sBlk; | |
874 | + int next_block = sqi->start_block + sBlk->directory_table_start, next_offset = | |
875 | + sqi->offset, length = 0, dirs_read = 0, dir_count, bytes; | |
876 | + squashfs_dir_header dirh; | |
877 | + char buffer[sizeof(squashfs_dir_entry) + SQUASHFS_NAME_LEN + 1]; | |
878 | + squashfs_dir_entry *dire = (squashfs_dir_entry *) buffer; | |
879 | + | |
880 | + TRACE("Entered squashfs_readdir [%x:%x]\n", next_block, next_offset); | |
881 | + | |
882 | + lock_kernel(); | |
883 | + | |
884 | + while(length < i->i_size) { | |
885 | + /* read directory header */ | |
886 | + if(msBlk->swap) { | |
887 | + squashfs_dir_header sdirh; | |
888 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, (char *) &sdirh, next_block, | |
889 | + next_offset, sizeof(sdirh), &next_block, &next_offset), !bytes) | |
890 | + goto failed_read; | |
891 | + SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh); | |
892 | + } else | |
893 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, (char *) &dirh, next_block, | |
894 | + next_offset, sizeof(dirh), &next_block, &next_offset), !bytes) | |
895 | + goto failed_read; | |
896 | + | |
897 | + dir_count = dirh.count + 1; | |
898 | + while(dir_count--) { | |
899 | + if(msBlk->swap) { | |
900 | + squashfs_dir_entry sdire; | |
901 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, (char *) &sdire, next_block, | |
902 | + next_offset, sizeof(sdire), &next_block, &next_offset), !bytes) | |
903 | + goto failed_read; | |
904 | + SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire); | |
905 | + } else | |
906 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, (char *) dire, next_block, | |
907 | + next_offset, sizeof(*dire), &next_block, &next_offset), !bytes) | |
908 | + goto failed_read; | |
909 | + | |
910 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, dire->name, next_block, | |
911 | + next_offset, dire->size + 1, &next_block, &next_offset), !bytes) | |
912 | + goto failed_read; | |
913 | + | |
914 | + if(file->f_pos >= length) | |
915 | + continue; | |
916 | + | |
917 | + dire->name[dire->size + 1] = '\0'; | |
918 | + | |
919 | + TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d)\n", dirent, | |
920 | + dire->name, dire->size + 1, (int) file->f_pos, | |
921 | + dirh.start_block, dire->offset, squashfs_filetype_table[dire->type]); | |
922 | + | |
923 | + if(filldir(dirent, dire->name, dire->size + 1, file->f_pos, SQUASHFS_MK_VFS_INODE(dirh.start_block, | |
924 | + dire->offset), squashfs_filetype_table[dire->type]) < 0) { | |
925 | + TRACE("Filldir returned less than 0\n"); | |
926 | + unlock_kernel(); | |
927 | + return dirs_read; | |
928 | + } | |
929 | + | |
930 | + file->f_pos = length; | |
931 | + dirs_read ++; | |
932 | + } | |
933 | + } | |
934 | + unlock_kernel(); | |
935 | + return dirs_read; | |
936 | + | |
937 | +failed_read: | |
938 | + ERROR("Unable to read directory block [%x:%x]\n", next_block, next_offset); | |
939 | + unlock_kernel(); | |
940 | + return 0; | |
941 | +} | |
942 | + | |
943 | + | |
944 | +static struct dentry *squashfs_lookup(struct inode *i, struct dentry *dentry, | |
945 | + struct nameidata *nd) | |
946 | +{ | |
947 | + const char *name =dentry->d_name.name; | |
948 | + int len = dentry->d_name.len; | |
949 | + struct inode *inode = NULL; | |
950 | + struct squashfs_inode_info *sqi = SQUASH_I(i); | |
951 | + squashfs_sb_info *msBlk = i->i_sb->s_fs_info; | |
952 | + squashfs_super_block *sBlk = &msBlk->sBlk; | |
953 | + int next_block = sqi->start_block + sBlk->directory_table_start, next_offset = | |
954 | + sqi->offset, length = 0, dir_count, bytes; | |
955 | + squashfs_dir_header dirh; | |
956 | + char buffer[sizeof(squashfs_dir_entry) + SQUASHFS_NAME_LEN]; | |
957 | + squashfs_dir_entry *dire = (squashfs_dir_entry *) buffer; | |
958 | + | |
959 | + TRACE("Entered squashfs_lookup [%x:%x]\n", next_block, next_offset); | |
960 | + | |
961 | + while(length < i->i_size) { | |
962 | + /* read directory header */ | |
963 | + if(msBlk->swap) { | |
964 | + squashfs_dir_header sdirh; | |
965 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, (char *) &sdirh, next_block, next_offset, | |
966 | + sizeof(sdirh), &next_block, &next_offset), !bytes) | |
967 | + goto failed_read; | |
968 | + SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh); | |
969 | + } else | |
970 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, (char *) &dirh, next_block, next_offset, | |
971 | + sizeof(dirh), &next_block, &next_offset), !bytes) | |
972 | + goto failed_read; | |
973 | + | |
974 | + dir_count = dirh.count + 1; | |
975 | + while(dir_count--) { | |
976 | + if(msBlk->swap) { | |
977 | + squashfs_dir_entry sdire; | |
978 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, (char *) &sdire, | |
979 | + next_block,next_offset, sizeof(sdire), &next_block, &next_offset), !bytes) | |
980 | + goto failed_read; | |
981 | + SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire); | |
982 | + } else | |
983 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, (char *) dire, | |
984 | + next_block,next_offset, sizeof(*dire), &next_block, &next_offset), !bytes) | |
985 | + goto failed_read; | |
986 | + | |
987 | + if(length += bytes = squashfs_get_cached_block(i->i_sb, dire->name, | |
988 | + next_block, next_offset, dire->size + 1, &next_block, &next_offset), !bytes) | |
989 | + goto failed_read; | |
990 | + | |
991 | + if((len == dire->size + 1) && !strncmp(name, dire->name, len)) { | |
992 | + squashfs_inode ino = SQUASHFS_MKINODE(dirh.start_block, dire->offset); | |
993 | + | |
994 | + TRACE("calling squashfs_iget for directory entry %s, inode %x:%x\n", | |
995 | + name, dirh.start_block, dire->offset); | |
996 | + | |
997 | + inode = squashfs_iget(i->i_sb, ino); | |
998 | + | |
999 | + goto exit_loop; | |
1000 | + } | |
1001 | + } | |
1002 | + } | |
1003 | + | |
1004 | +exit_loop: | |
1005 | + d_add(dentry, inode); | |
1006 | + return ERR_PTR(0); | |
1007 | + | |
1008 | +failed_read: | |
1009 | + ERROR("Unable to read directory block [%x:%x]\n", next_block, next_offset); | |
1010 | + goto exit_loop; | |
1011 | +} | |
1012 | + | |
1013 | + | |
1014 | +static void squashfs_put_super(struct super_block *s) | |
1015 | +{ | |
1016 | + squashfs_sb_info *msBlk = s->s_fs_info; | |
1017 | + kfree(msBlk->block_cache); | |
1018 | + kfree(msBlk->read_data); | |
1019 | + kfree(msBlk->read_page); | |
1020 | + kfree(msBlk->uid); | |
1021 | + kfree(msBlk); | |
1022 | + s->s_fs_info = NULL; | |
1023 | +} | |
1024 | + | |
1025 | +static struct super_block *squashfs_get_sb(struct file_system_type *fs_type, | |
1026 | + int flags, const char *dev_name, void *data) | |
1027 | +{ | |
1028 | + return get_sb_bdev(fs_type, flags, dev_name, data, | |
1029 | + squashfs_fill_super); | |
1030 | +} | |
1031 | + | |
1032 | +static kmem_cache_t * squashfs_inode_cachep; | |
1033 | + | |
1034 | +static struct inode *squashfs_alloc_inode(struct super_block *sb) | |
1035 | +{ | |
1036 | + struct squashfs_inode_info *ii; | |
1037 | + ii = (struct squashfs_inode_info *) | |
1038 | + kmem_cache_alloc(squashfs_inode_cachep, SLAB_KERNEL); | |
1039 | + if (!ii) | |
1040 | + return NULL; | |
1041 | + ii->vfs_inode.i_version = 1; | |
1042 | + return &ii->vfs_inode; | |
1043 | +} | |
1044 | + | |
1045 | +static void squashfs_destroy_inode(struct inode *inode) | |
1046 | +{ | |
1047 | + kmem_cache_free(squashfs_inode_cachep, SQUASH_I(inode)); | |
1048 | +} | |
1049 | + | |
1050 | +static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) | |
1051 | +{ | |
1052 | + struct squashfs_inode_info *sqi = (struct squashfs_inode_info *) foo; | |
1053 | + | |
1054 | + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
1055 | + SLAB_CTOR_CONSTRUCTOR) { | |
1056 | + inode_init_once(&sqi->vfs_inode); | |
1057 | + } | |
1058 | +} | |
1059 | + | |
1060 | +static int init_inodecache(void) | |
1061 | +{ | |
1062 | + squashfs_inode_cachep = | |
1063 | + kmem_cache_create("squashfs_inode_cache", | |
1064 | + sizeof(struct squashfs_inode_info), | |
1065 | + 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT, | |
1066 | + init_once, NULL); | |
1067 | + if (squashfs_inode_cachep == NULL) | |
1068 | + return -ENOMEM; | |
1069 | + return 0; | |
1070 | +} | |
1071 | + | |
1072 | +static void destroy_inodecache(void) | |
1073 | +{ | |
1074 | + kmem_cache_destroy(squashfs_inode_cachep); | |
1075 | +} | |
1076 | + | |
1077 | +static int __init init_squashfs_fs(void) | |
1078 | +{ | |
1079 | + | |
1080 | + if(!(stream.workspace = (char *) vmalloc(zlib_inflate_workspacesize()))) { | |
1081 | + ERROR("Failed to allocate zlib workspace\n"); | |
1082 | + return -ENOMEM; | |
1083 | + } | |
1084 | + if (init_inodecache()) | |
1085 | + return -ENOMEM; | |
1086 | + return register_filesystem(&squashfs_fs_type); | |
1087 | +} | |
1088 | + | |
1089 | + | |
1090 | +static void __exit exit_squashfs_fs(void) | |
1091 | +{ | |
1092 | + destroy_inodecache(); | |
1093 | + vfree(stream.workspace); | |
1094 | + unregister_filesystem(&squashfs_fs_type); | |
1095 | +} | |
1096 | + | |
1097 | + | |
1098 | +module_init(init_squashfs_fs); | |
1099 | +module_exit(exit_squashfs_fs); | |
1100 | +MODULE_DESCRIPTION("squashfs, a compressed read-only filesystem"); | |
1101 | +MODULE_AUTHOR("Phillip Lougher <phillip@lougher.demon.co.uk>"); | |
1102 | +MODULE_LICENSE("GPL"); | |
1103 | diff -Naur linux-2.6.0-test1-ac2/include/linux/squashfs_fs.h linux-2.6.0-test1-ac2-sfs/include/linux/squashfs_fs.h | |
1104 | --- linux-2.6.0-test1-ac2/include/linux/squashfs_fs.h 1969-12-31 16:00:00.000000000 -0800 | |
1105 | +++ linux-2.6.0-test1-ac2-sfs/include/linux/squashfs_fs.h 2003-07-18 16:12:47.000000000 -0700 | |
1106 | @@ -0,0 +1,304 @@ | |
1107 | +#ifndef SQUASHFS_FS | |
1108 | +#define SQUASHFS_FS | |
1109 | +/* | |
1110 | + * Squashfs | |
1111 | + * | |
1112 | + * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk> | |
1113 | + * | |
1114 | + * This program is free software; you can redistribute it and/or | |
1115 | + * modify it under the terms of the GNU General Public License | |
1116 | + * as published by the Free Software Foundation; either version | |
1117 | + * 2 of the License, or (at your option) any later version. | |
1118 | + * | |
1119 | + * squashfs_fs.h | |
1120 | + */ | |
1121 | + | |
1122 | +#define SQUASHFS_MAJOR 1 | |
1123 | +#define SQUASHFS_MINOR 0 | |
1124 | +#define SQUASHFS_MAGIC 0x73717368 | |
1125 | +#define SQUASHFS_MAGIC_SWAP 0x68737173 | |
1126 | +#define SQUASHFS_START 0 | |
1127 | + | |
1128 | +/* size of metadata (inode and directory) blocks */ | |
1129 | +#define SQUASHFS_METADATA_SIZE 8192 | |
1130 | +#define SQUASHFS_METADATA_LOG 13 | |
1131 | + | |
1132 | +/* default size of data blocks */ | |
1133 | +#define SQUASHFS_FILE_SIZE 32768 | |
1134 | +#define SQUASHFS_FILE_LOG 15 | |
1135 | + | |
1136 | +#define SQUASHFS_FILE_MAX_SIZE 32768 | |
1137 | + | |
1138 | +/* Max number of uids and gids */ | |
1139 | +#define SQUASHFS_UIDS 48 | |
1140 | +#define SQUASHFS_GUIDS 15 | |
1141 | + | |
1142 | +/* Max length of filename (not 255) */ | |
1143 | +#define SQUASHFS_NAME_LEN 256 | |
1144 | + | |
1145 | +#define SQUASHFS_INVALID ((long long) 0xffffffffffff) | |
1146 | +#define SQUASHFS_INVALID_BLK ((long long) 0xffffffff) | |
1147 | +#define SQUASHFS_USED_BLK ((long long) 0xfffffffe) | |
1148 | + | |
1149 | +/* Filesystem flags */ | |
1150 | +#define SQUASHFS_NOI 1 | |
1151 | +#define SQUASHFS_NOD 2 | |
1152 | +#define SQUASHFS_CHECK 4 | |
1153 | +#define SQUASHFS_UNCOMPRESSED_INODES(flags) (flags & SQUASHFS_NOI) | |
1154 | +#define SQUASHFS_UNCOMPRESSED_DATA(flags) (flags & SQUASHFS_NOD) | |
1155 | +#define SQUASHFS_CHECK_DATA(flags) (flags & SQUASHFS_CHECK) | |
1156 | +#define SQUASHFS_MKFLAGS(noi, nod, check_data) (noi | (nod << 1) | (check_data << 2)) | |
1157 | + | |
1158 | +/* Max number of types and file types */ | |
1159 | +#define SQUASHFS_TYPES 5 | |
1160 | +#define SQUASHFS_DIR_TYPE 1 | |
1161 | +#define SQUASHFS_FILE_TYPE 2 | |
1162 | +#define SQUASHFS_SYMLINK_TYPE 3 | |
1163 | +#define SQUASHFS_BLKDEV_TYPE 4 | |
1164 | +#define SQUASHFS_CHRDEV_TYPE 5 | |
1165 | + | |
1166 | +/* Flag whether block is compressed or uncompressed, bit is set if block is uncompressed */ | |
1167 | +#define SQUASHFS_COMPRESSED_BIT (1 << 15) | |
1168 | +#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \ | |
1169 | + (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT) | |
1170 | + | |
1171 | +#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT)) | |
1172 | + | |
1173 | +/* | |
1174 | + * Inode number ops. Inodes consist of a compressed block number, and an uncompressed | |
1175 | + * offset within that block | |
1176 | + */ | |
1177 | +#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16)) | |
1178 | +#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff)) | |
1179 | +#define SQUASHFS_MKINODE(A, B) ((squashfs_inode)(((squashfs_inode) (A) << 16)\ | |
1180 | + + (B))) | |
1181 | + | |
1182 | +/* Compute 32 bit VFS inode number from squashfs inode number */ | |
1183 | +#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + ((b) >> 2) + 1)) | |
1184 | + | |
1185 | +/* Translate between VFS mode and squashfs mode */ | |
1186 | +#define SQUASHFS_MODE(a) ((a) & 0xfff) | |
1187 | + | |
1188 | +/* cached data constants for filesystem */ | |
1189 | +#define SQUASHFS_CACHED_BLKS 8 | |
1190 | + | |
1191 | +#define SQUASHFS_MAX_FILE_SIZE_LOG 32 | |
1192 | +#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << SQUASHFS_MAX_FILE_SIZE_LOG - 1) | |
1193 | + | |
1194 | +#define SQUASHFS_MARKER_BYTE 0xff | |
1195 | + | |
1196 | +/* | |
1197 | + * definitions for structures on disk | |
1198 | + */ | |
1199 | + | |
1200 | +typedef unsigned int squashfs_block; | |
1201 | +typedef long long squashfs_inode; | |
1202 | + | |
1203 | +typedef unsigned int squashfs_uid; | |
1204 | + | |
1205 | +typedef struct squashfs_super_block { | |
1206 | + unsigned int s_magic __attribute__ ((packed)); | |
1207 | + unsigned int inodes __attribute__ ((packed)); | |
1208 | + unsigned int bytes_used __attribute__ ((packed)); | |
1209 | + unsigned int uid_start __attribute__ ((packed)); | |
1210 | + unsigned int guid_start __attribute__ ((packed)); | |
1211 | + unsigned int inode_table_start __attribute__ ((packed)); | |
1212 | + unsigned int directory_table_start __attribute__ ((packed)); | |
1213 | + unsigned int s_major:16 __attribute__ ((packed)); | |
1214 | + unsigned int s_minor:16 __attribute__ ((packed)); | |
1215 | + unsigned int block_size:16 __attribute__ ((packed)); | |
1216 | + unsigned int block_log:16 __attribute__ ((packed)); | |
1217 | + unsigned int flags:8 __attribute__ ((packed)); | |
1218 | + unsigned int no_uids:8 __attribute__ ((packed)); | |
1219 | + unsigned int no_guids:8 __attribute__ ((packed)); | |
1220 | + time_t mkfs_time /* time of filesystem creation */ __attribute__ ((packed)); | |
1221 | + squashfs_inode root_inode __attribute__ ((packed)); | |
1222 | +} squashfs_super_block; | |
1223 | + | |
1224 | +typedef struct { | |
1225 | + unsigned int inode_type:4 __attribute__ ((packed)); | |
1226 | + unsigned int mode:12 __attribute__ ((packed)); /* protection */ | |
1227 | + unsigned int uid:4 __attribute__ ((packed)); /* index into uid table */ | |
1228 | + unsigned int guid:4 __attribute__ ((packed)); /* index into guid table */ | |
1229 | +} squashfs_base_inode_header; | |
1230 | + | |
1231 | +typedef struct { | |
1232 | + unsigned int inode_type:4 __attribute__ ((packed)); | |
1233 | + unsigned int mode:12 __attribute__ ((packed)); /* protection */ | |
1234 | + unsigned int uid:4 __attribute__ ((packed)); /* index into uid table */ | |
1235 | + unsigned int guid:4 __attribute__ ((packed)); /* index into guid table */ | |
1236 | + unsigned short rdev __attribute__ ((packed)); | |
1237 | +} squashfs_dev_inode_header; | |
1238 | + | |
1239 | +typedef struct { | |
1240 | + unsigned int inode_type:4 __attribute__ ((packed)); | |
1241 | + unsigned int mode:12 __attribute__ ((packed)); /* protection */ | |
1242 | + unsigned int uid:4 __attribute__ ((packed)); /* index into uid table */ | |
1243 | + unsigned int guid:4 __attribute__ ((packed)); /* index into guid table */ | |
1244 | + unsigned short symlink_size __attribute__ ((packed)); | |
1245 | + char symlink[0] __attribute__ ((packed)); | |
1246 | +} squashfs_symlink_inode_header; | |
1247 | + | |
1248 | +typedef struct { | |
1249 | + unsigned int inode_type:4 __attribute__ ((packed)); | |
1250 | + unsigned int mode:12 __attribute__ ((packed)); /* protection */ | |
1251 | + unsigned int uid:4 __attribute__ ((packed)); /* index into uid table */ | |
1252 | + unsigned int guid:4 __attribute__ ((packed)); /* index into guid table */ | |
1253 | + time_t mtime __attribute__ ((packed)); | |
1254 | + squashfs_block start_block __attribute__ ((packed)); | |
1255 | + unsigned int file_size:SQUASHFS_MAX_FILE_SIZE_LOG __attribute__ ((packed)); | |
1256 | + unsigned short block_list[0] __attribute__ ((packed)); | |
1257 | +} squashfs_reg_inode_header; | |
1258 | + | |
1259 | +typedef struct { | |
1260 | + unsigned int inode_type:4 __attribute__ ((packed)); | |
1261 | + unsigned int mode:12 __attribute__ ((packed)); /* protection */ | |
1262 | + unsigned int uid:4 __attribute__ ((packed)); /* index into uid table */ | |
1263 | + unsigned int guid:4 __attribute__ ((packed)); /* index into guid table */ | |
1264 | + unsigned int file_size:19 __attribute__ ((packed)); | |
1265 | + unsigned int offset:13 __attribute__ ((packed)); | |
1266 | + time_t mtime __attribute__ ((packed)); | |
1267 | + unsigned int start_block:24 __attribute__ ((packed)); | |
1268 | +} squashfs_dir_inode_header; | |
1269 | + | |
1270 | +typedef union { | |
1271 | + squashfs_base_inode_header base; | |
1272 | + squashfs_dev_inode_header dev; | |
1273 | + squashfs_symlink_inode_header symlink; | |
1274 | + squashfs_reg_inode_header reg; | |
1275 | + squashfs_dir_inode_header dir; | |
1276 | +} squashfs_inode_header; | |
1277 | + | |
1278 | +typedef struct { | |
1279 | + unsigned int offset:13 __attribute__ ((packed)); | |
1280 | + unsigned int type:3 __attribute__ ((packed)); | |
1281 | + unsigned int size:8 __attribute__ ((packed)); | |
1282 | + char name[0] __attribute__ ((packed)); | |
1283 | +} squashfs_dir_entry; | |
1284 | + | |
1285 | +typedef struct { | |
1286 | + unsigned int count:8 __attribute__ ((packed)); | |
1287 | + unsigned int start_block:24 __attribute__ ((packed)); | |
1288 | +} squashfs_dir_header; | |
1289 | + | |
1290 | + | |
1291 | +extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen); | |
1292 | +extern int squashfs_uncompress_init(void); | |
1293 | +extern int squashfs_uncompress_exit(void); | |
1294 | + | |
1295 | +/* | |
1296 | + * macros to convert each packed bitfield structure from little endian to big | |
1297 | + * endian and vice versa. These are needed when creating or using a filesystem on a | |
1298 | + * machine with different byte ordering to the target architecture. | |
1299 | + * | |
1300 | + */ | |
1301 | + | |
1302 | +#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\ | |
1303 | + SQUASHFS_MEMSET(s, d, sizeof(squashfs_super_block));\ | |
1304 | + SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\ | |
1305 | + SQUASHFS_SWAP((s)->inodes, d, 32, 32);\ | |
1306 | + SQUASHFS_SWAP((s)->bytes_used, d, 64, 32);\ | |
1307 | + SQUASHFS_SWAP((s)->uid_start, d, 96, 32);\ | |
1308 | + SQUASHFS_SWAP((s)->guid_start, d, 128, 32);\ | |
1309 | + SQUASHFS_SWAP((s)->inode_table_start, d, 160, 32);\ | |
1310 | + SQUASHFS_SWAP((s)->directory_table_start, d, 192, 32);\ | |
1311 | + SQUASHFS_SWAP((s)->s_major, d, 224, 16);\ | |
1312 | + SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\ | |
1313 | + SQUASHFS_SWAP((s)->block_size, d, 256, 16);\ | |
1314 | + SQUASHFS_SWAP((s)->block_log, d, 272, 16);\ | |
1315 | + SQUASHFS_SWAP((s)->flags, d, 288, 8);\ | |
1316 | + SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\ | |
1317 | + SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\ | |
1318 | + SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\ | |
1319 | + SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\ | |
1320 | +} | |
1321 | + | |
1322 | +#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\ | |
1323 | + SQUASHFS_MEMSET(s, d, n);\ | |
1324 | + SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\ | |
1325 | + SQUASHFS_SWAP((s)->mode, d, 4, 12);\ | |
1326 | + SQUASHFS_SWAP((s)->uid, d, 16, 4);\ | |
1327 | + SQUASHFS_SWAP((s)->guid, d, 20, 4);\ | |
1328 | +} | |
1329 | + | |
1330 | +#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\ | |
1331 | + SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dev_inode_header));\ | |
1332 | + SQUASHFS_SWAP((s)->rdev, d, 24, 16);\ | |
1333 | +} | |
1334 | + | |
1335 | +#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\ | |
1336 | + SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_symlink_inode_header));\ | |
1337 | + SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\ | |
1338 | +} | |
1339 | + | |
1340 | +#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\ | |
1341 | + SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_reg_inode_header));\ | |
1342 | + SQUASHFS_SWAP((s)->mtime, d, 24, 32);\ | |
1343 | + SQUASHFS_SWAP((s)->start_block, d, 56, 32);\ | |
1344 | + SQUASHFS_SWAP((s)->file_size, d, 88, SQUASHFS_MAX_FILE_SIZE_LOG);\ | |
1345 | +} | |
1346 | + | |
1347 | +#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\ | |
1348 | + SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dir_inode_header));\ | |
1349 | + SQUASHFS_SWAP((s)->file_size, d, 24, 19);\ | |
1350 | + SQUASHFS_SWAP((s)->offset, d, 43, 13);\ | |
1351 | + SQUASHFS_SWAP((s)->mtime, d, 56, 32);\ | |
1352 | + SQUASHFS_SWAP((s)->start_block, d, 88, 24);\ | |
1353 | +} | |
1354 | + | |
1355 | +#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\ | |
1356 | + SQUASHFS_MEMSET(s, d, sizeof(squashfs_dir_header));\ | |
1357 | + SQUASHFS_SWAP((s)->count, d, 0, 8);\ | |
1358 | + SQUASHFS_SWAP((s)->start_block, d, 8, 24);\ | |
1359 | +} | |
1360 | + | |
1361 | +#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\ | |
1362 | + SQUASHFS_MEMSET(s, d, sizeof(squashfs_dir_entry));\ | |
1363 | + SQUASHFS_SWAP((s)->offset, d, 0, 13);\ | |
1364 | + SQUASHFS_SWAP((s)->type, d, 13, 3);\ | |
1365 | + SQUASHFS_SWAP((s)->size, d, 16, 8);\ | |
1366 | +} | |
1367 | + | |
1368 | +#define SQUASHFS_SWAP_SHORTS(s, d, n) {\ | |
1369 | + int entry;\ | |
1370 | + int bit_position;\ | |
1371 | + SQUASHFS_MEMSET(s, d, n * 2);\ | |
1372 | + for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += 16)\ | |
1373 | + SQUASHFS_SWAP(s[entry], d, bit_position, 16);\ | |
1374 | +} | |
1375 | + | |
1376 | +#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\ | |
1377 | + int entry;\ | |
1378 | + int bit_position;\ | |
1379 | + SQUASHFS_MEMSET(s, d, n * bits / 8);\ | |
1380 | + for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += bits)\ | |
1381 | + SQUASHFS_SWAP(s[entry], d, bit_position, bits);\ | |
1382 | +} | |
1383 | + | |
1384 | +#ifdef __KERNEL__ | |
1385 | +/* | |
1386 | + * macros used to swap each structure entry, taking into account | |
1387 | + * bitfields and different bitfield placing conventions on differing architectures | |
1388 | + */ | |
1389 | +#include <asm/byteorder.h> | |
1390 | +#ifdef __BIG_ENDIAN | |
1391 | + /* convert from little endian to big endian */ | |
1392 | +#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, b_pos) | |
1393 | +#else | |
1394 | + /* convert from big endian to little endian */ | |
1395 | +#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, 64 - tbits - b_pos) | |
1396 | +#endif | |
1397 | + | |
1398 | +#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\ | |
1399 | + int bits;\ | |
1400 | + int b_pos = pos % 8;\ | |
1401 | + unsigned long long val = 0;\ | |
1402 | + unsigned char *s = (unsigned char *)p + (pos / 8);\ | |
1403 | + unsigned char *d = ((unsigned char *) &val) + 7;\ | |
1404 | + for(bits = 0; bits < (tbits + b_pos); bits += 8) \ | |
1405 | + *d-- = *s++;\ | |
1406 | + value = val >> (SHIFT);\ | |
1407 | +} | |
1408 | +#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n); | |
1409 | +#endif | |
1410 | +#endif | |
1411 | diff -Naur linux-2.6.0-test1-ac2/include/linux/squashfs_fs_sb.h linux-2.6.0-test1-ac2-sfs/include/linux/squashfs_fs_sb.h | |
1412 | --- linux-2.6.0-test1-ac2/include/linux/squashfs_fs_sb.h 1969-12-31 16:00:00.000000000 -0800 | |
1413 | +++ linux-2.6.0-test1-ac2-sfs/include/linux/squashfs_fs_sb.h 2003-07-18 16:12:47.000000000 -0700 | |
1414 | @@ -0,0 +1,41 @@ | |
1415 | +#ifndef SQUASHFS_FS_SB | |
1416 | +#define SQUASHFS_FS_SB | |
1417 | +/* | |
1418 | + * Squashfs | |
1419 | + * | |
1420 | + * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk> | |
1421 | + * | |
1422 | + * This program is free software; you can redistribute it and/or | |
1423 | + * modify it under the terms of the GNU General Public License | |
1424 | + * as published by the Free Software Foundation; either version | |
1425 | + * 2 of the License, or (at your option) any later version. | |
1426 | + * | |
1427 | + * squashfs_fs_sb.h | |
1428 | + */ | |
1429 | + | |
1430 | +#include <linux/squashfs_fs.h> | |
1431 | + | |
1432 | +typedef struct { | |
1433 | + unsigned int block; | |
1434 | + int length; | |
1435 | + unsigned int next_index; | |
1436 | + char *data; | |
1437 | + } squashfs_cache; | |
1438 | + | |
1439 | +typedef struct squashfs_sb_info { | |
1440 | + squashfs_super_block sBlk; | |
1441 | + int devblksize; | |
1442 | + int devblksize_log2; | |
1443 | + int swap; | |
1444 | + squashfs_cache *block_cache; | |
1445 | + int next_cache; | |
1446 | + squashfs_uid *uid; | |
1447 | + squashfs_uid *guid; | |
1448 | + unsigned int read_size; | |
1449 | + char *read_data; | |
1450 | + char *read_page; | |
1451 | + struct semaphore read_page_mutex; | |
1452 | + struct semaphore block_cache_mutex; | |
1453 | + wait_queue_head_t waitq; | |
1454 | + } squashfs_sb_info; | |
1455 | +#endif | |
1456 | diff -Naur linux-2.6.0-test1-ac2/lib/Kconfig linux-2.6.0-test1-ac2-sfs/lib/Kconfig | |
1457 | --- linux-2.6.0-test1-ac2/lib/Kconfig 2003-05-04 16:53:32.000000000 -0700 | |
1458 | +++ linux-2.6.0-test1-ac2-sfs/lib/Kconfig 2003-07-16 16:40:44.000000000 -0700 | |
1459 | @@ -17,8 +17,8 @@ | |
1460 | # | |
1461 | config ZLIB_INFLATE | |
1462 | tristate | |
1463 | - default y if CRAMFS=y || PPP_DEFLATE=y || JFFS2_FS=y || ZISOFS_FS=y || BINFMT_ZFLAT=y || CRYPTO_DEFLATE=y | |
1464 | - default m if CRAMFS=m || PPP_DEFLATE=m || JFFS2_FS=m || ZISOFS_FS=m || BINFMT_ZFLAT=m || CRYPTO_DEFLATE=m | |
1465 | + default y if CRAMFS=y || SQUASHFS=y || PPP_DEFLATE=y || JFFS2_FS=y || ZISOFS_FS=y || BINFMT_ZFLAT=y || CRYPTO_DEFLATE=y | |
1466 | + default m if CRAMFS=m || SQUASHFS=m || PPP_DEFLATE=m || JFFS2_FS=m || ZISOFS_FS=m || BINFMT_ZFLAT=m || CRYPTO_DEFLATE=m | |
1467 | ||
1468 | config ZLIB_DEFLATE | |
1469 | tristate |