Contents of /trunk/kernel26-alx/patches-2.6.24-r3/0161-2.6.24-axfs-svn18.patch
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Revision 1022 -
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Sun Apr 25 14:59:21 2010 UTC (14 years, 5 months ago) by niro
File size: 98156 byte(s)
Sun Apr 25 14:59:21 2010 UTC (14 years, 5 months ago) by niro
File size: 98156 byte(s)
-added alx kernel
1 | diff -Naur linux-2.6.24/fs/axfs/axfs_bdev.c linux-2.6.24-axfs/fs/axfs/axfs_bdev.c |
2 | --- linux-2.6.24/fs/axfs/axfs_bdev.c 1970-01-01 01:00:00.000000000 +0100 |
3 | +++ linux-2.6.24-axfs/fs/axfs/axfs_bdev.c 2008-08-24 19:12:32.000000000 +0200 |
4 | @@ -0,0 +1,179 @@ |
5 | +/* |
6 | + * Advanced XIP File System for Linux - AXFS |
7 | + * Readonly, compressed, and XIP filesystem for Linux systems big and small |
8 | + * |
9 | + * Copyright(c) 2008 Numonyx |
10 | + * |
11 | + * This program is free software; you can redistribute it and/or modify it |
12 | + * under the terms and conditions of the GNU General Public License, |
13 | + * version 2, as published by the Free Software Foundation. |
14 | + * |
15 | + * Authors: |
16 | + * Jared Hulbert <jaredeh@gmail.com> |
17 | + * |
18 | + * Project url: http://axfs.sourceforge.net |
19 | + * |
20 | + * axfs_bdev.c - |
21 | + * Allows axfs to use block devices or has dummy functions if block |
22 | + * device support is compiled out of the kernel. |
23 | + * |
24 | + */ |
25 | + |
26 | +#include <linux/axfs.h> |
27 | +#include <linux/mount.h> |
28 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
29 | +#else |
30 | +#define CONFIG_BLOCK |
31 | +#endif |
32 | +#ifdef CONFIG_BLOCK |
33 | +#include <linux/buffer_head.h> |
34 | +#include <linux/namei.h> |
35 | + |
36 | +int axfs_fill_super(struct super_block *sb, void *data, int silent); |
37 | + |
38 | +int axfs_get_sb_bdev(struct file_system_type *fs_type, int flags, |
39 | + const char *dev_name, struct axfs_super *sbi, |
40 | + struct vfsmount *mnt, int *err) |
41 | +{ |
42 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17) |
43 | + *err = get_sb_bdev(fs_type, flags, dev_name, sbi, axfs_fill_super, mnt); |
44 | + |
45 | + if (*err) |
46 | + return FALSE; |
47 | +#else |
48 | + mnt->mnt_sb = |
49 | + get_sb_bdev(fs_type, flags, dev_name, (void *)sbi, axfs_fill_super); |
50 | + if (IS_ERR(mnt->mnt_sb)) { |
51 | + *err = PTR_ERR(mnt->mnt_sb); |
52 | + return FALSE; |
53 | + } |
54 | +#endif |
55 | + return TRUE; |
56 | +} |
57 | + |
58 | +void axfs_kill_block_super(struct super_block *sb) |
59 | +{ |
60 | + kill_block_super(sb); |
61 | +} |
62 | + |
63 | +/****************************************************************************** |
64 | + * |
65 | + * axfs_copy_block_data |
66 | + * |
67 | + * Description: Helper function to read data from block device |
68 | + * |
69 | + * Parameters: |
70 | + * (IN) sb - pointer to super block structure. |
71 | + * |
72 | + * (IN) dst_addr - pointer to buffer into which data is to be read. |
73 | + * |
74 | + * (IN) boffset - offset within block device |
75 | + * |
76 | + * (IN) len - length of data to be read |
77 | + * |
78 | + * Returns: |
79 | + * 0 or error number |
80 | + * |
81 | + *****************************************************************************/ |
82 | +int axfs_copy_block(struct super_block *sb, void *dst_addr, u64 fsoffset, |
83 | + u64 len) |
84 | +{ |
85 | + struct axfs_super *sbi = AXFS_SB(sb); |
86 | + u64 boffset = AXFS_FSOFFSET_2_DEVOFFSET(sbi, fsoffset); |
87 | + u64 blocks; |
88 | + u64 blksize = sb->s_blocksize; |
89 | + unsigned long dst; |
90 | + unsigned long src; |
91 | + sector_t block; |
92 | + size_t bytes; |
93 | + struct buffer_head *bh; |
94 | + u64 copied = 0; |
95 | + |
96 | + if (len == 0) |
97 | + return 0; |
98 | + |
99 | + blocks = len / blksize; |
100 | + if ((len % blksize) > 0) |
101 | + blocks += 1; |
102 | + |
103 | + while (copied < len) { |
104 | + /* Explicit casting for ARM linker errors. */ |
105 | + block = (sector_t) boffset + (sector_t) copied; |
106 | + block /= (sector_t) blksize; |
107 | + bh = sb_bread(sb, block); |
108 | + src = (unsigned long)bh->b_data; |
109 | + dst = (unsigned long)dst_addr; |
110 | + if (copied == 0) { |
111 | + /* Explicit casting for ARM linker errors. */ |
112 | + bytes = (size_t) blksize; |
113 | + bytes -= (size_t) boffset % (size_t) blksize; |
114 | + if (bytes > len) |
115 | + bytes = len; |
116 | + /* Explicit casting for ARM linker errors. */ |
117 | + src += (unsigned long)boffset % (unsigned long)blksize; |
118 | + } else { |
119 | + dst += copied; |
120 | + if ((len - copied) < blksize) { |
121 | + bytes = len - copied; |
122 | + } else { |
123 | + bytes = blksize; |
124 | + } |
125 | + } |
126 | + memcpy((void *)dst, (void *)src, bytes); |
127 | + copied += bytes; |
128 | + brelse(bh); |
129 | + } |
130 | + return 0; |
131 | +} |
132 | + |
133 | +int axfs_is_dev_bdev(char *path) |
134 | +{ |
135 | + struct nameidata nd; |
136 | + int ret = FALSE; |
137 | + |
138 | + if (!path) |
139 | + return FALSE; |
140 | + |
141 | + if (path_lookup(path, LOOKUP_FOLLOW, &nd)) |
142 | + return FALSE; |
143 | + |
144 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,24) |
145 | + if (S_ISBLK(nd.path.dentry->d_inode->i_mode)) |
146 | +#else |
147 | + if (S_ISBLK(nd.dentry->d_inode->i_mode)) |
148 | +#endif |
149 | + ret = TRUE; |
150 | + |
151 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,24) |
152 | + path_put(&nd.path); |
153 | +#else |
154 | + path_release(&nd); |
155 | +#endif |
156 | + return ret; |
157 | +} |
158 | + |
159 | +#else |
160 | + |
161 | +int axfs_get_sb_bdev(struct file_system_type *fs_type, int flags, |
162 | + const char *dev_name, struct axfs_super *sbi, |
163 | + struct vfsmount *mnt, int *err) |
164 | +{ |
165 | + return FALSE; |
166 | +} |
167 | + |
168 | +void axfs_kill_block_super(struct super_block *sb) |
169 | +{ |
170 | +} |
171 | + |
172 | +int axfs_copy_block(struct super_block *sb, void *dst_addr, u64 fsoffset, |
173 | + u64 len) |
174 | +{ |
175 | + return -EINVAL; |
176 | +} |
177 | + |
178 | +int axfs_is_dev_bdev(char *path) |
179 | +{ |
180 | + return FALSE; |
181 | +} |
182 | + |
183 | +#endif /* CONFIG_BLOCK */ |
184 | diff -Naur linux-2.6.24/fs/axfs/axfs_inode.c linux-2.6.24-axfs/fs/axfs/axfs_inode.c |
185 | --- linux-2.6.24/fs/axfs/axfs_inode.c 1970-01-01 01:00:00.000000000 +0100 |
186 | +++ linux-2.6.24-axfs/fs/axfs/axfs_inode.c 2008-08-24 19:12:32.000000000 +0200 |
187 | @@ -0,0 +1,711 @@ |
188 | +/* |
189 | + * Advanced XIP File System for Linux - AXFS |
190 | + * Readonly, compressed, and XIP filesystem for Linux systems big and small |
191 | + * |
192 | + * Copyright(c) 2008 Numonyx |
193 | + * |
194 | + * This program is free software; you can redistribute it and/or modify it |
195 | + * under the terms and conditions of the GNU General Public License, |
196 | + * version 2, as published by the Free Software Foundation. |
197 | + * |
198 | + * Authors: |
199 | + * Eric Anderson |
200 | + * Jared Hulbert <jaredeh@gmail.com> |
201 | + * Sujaya Srinivasan |
202 | + * Justin Treon |
203 | + * |
204 | + * Project url: http://axfs.sourceforge.net |
205 | + * |
206 | + * Borrowed heavily from fs/cramfs/inode.c by Linus Torvalds |
207 | + * |
208 | + * axfs_inode.c - |
209 | + * Contains the most of the filesystem logic with the major exception of the |
210 | + * mounting infrastructure. |
211 | + * |
212 | + */ |
213 | + |
214 | +#include <linux/axfs.h> |
215 | +#include <linux/pagemap.h> |
216 | + |
217 | +/***************** functions in other axfs files ******************************/ |
218 | +int axfs_get_sb(struct file_system_type *, int, const char *, void *, |
219 | + struct vfsmount *); |
220 | +void axfs_kill_super(struct super_block *); |
221 | +void axfs_profiling_add(struct axfs_super *, unsigned long, unsigned int); |
222 | +int axfs_copy_mtd(struct super_block *, void *, u64, u64); |
223 | +int axfs_copy_block(struct super_block *, void *, u64, u64); |
224 | +/******************************************************************************/ |
225 | +static int axfs_readdir(struct file *, void *, filldir_t); |
226 | +static int axfs_mmap(struct file *, struct vm_area_struct *); |
227 | +static ssize_t axfs_file_read(struct file *, char __user *, size_t, loff_t *); |
228 | +static int axfs_readpage(struct file *, struct page *); |
229 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22) |
230 | +static int axfs_fault(struct vm_area_struct *, struct vm_fault *); |
231 | +#else |
232 | +static struct page *axfs_nopage(struct vm_area_struct *, unsigned long, int *); |
233 | +#endif |
234 | +static struct dentry *axfs_lookup(struct inode *, struct dentry *, |
235 | + struct nameidata *); |
236 | +static int axfs_get_xip_mem(struct address_space *, pgoff_t, int, void **, |
237 | + unsigned long *); |
238 | +#ifdef VM_MIXEDMAP |
239 | +#else |
240 | +struct page *axfs_get_xip_page(struct address_space *mapping, sector_t offset, |
241 | + int create); |
242 | +#endif |
243 | + |
244 | +/******************************************************************************/ |
245 | + |
246 | +static struct file_operations axfs_directory_operations = { |
247 | + .llseek = generic_file_llseek, |
248 | + .read = generic_read_dir, |
249 | + .readdir = axfs_readdir, |
250 | +}; |
251 | + |
252 | +static struct file_operations axfs_fops = { |
253 | + .read = axfs_file_read, |
254 | + .aio_read = generic_file_aio_read, |
255 | + .mmap = axfs_mmap, |
256 | +}; |
257 | + |
258 | +static struct address_space_operations axfs_aops = { |
259 | + .readpage = axfs_readpage, |
260 | +#ifdef VM_MIXEDMAP |
261 | + .get_xip_mem = axfs_get_xip_mem, |
262 | +#else |
263 | + .get_xip_page = axfs_get_xip_page, |
264 | +#endif |
265 | +}; |
266 | + |
267 | +static struct inode_operations axfs_dir_inode_operations = { |
268 | + .lookup = axfs_lookup, |
269 | +}; |
270 | + |
271 | +static struct vm_operations_struct axfs_vm_ops = { |
272 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22) |
273 | + .fault = axfs_fault, |
274 | +#else |
275 | + .nopage = axfs_nopage, |
276 | +#endif |
277 | +}; |
278 | + |
279 | +static int axfs_copy_data(struct super_block *sb, void *dst, |
280 | + struct axfs_region_desc *region, u64 offset, u64 len) |
281 | +{ |
282 | + u64 mmapped = 0; |
283 | + u64 end = region->fsoffset + offset + len; |
284 | + u64 begin = region->fsoffset + offset; |
285 | + u64 left; |
286 | + void *addr; |
287 | + void *newdst; |
288 | + struct axfs_super *sbi = AXFS_SB(sb); |
289 | + |
290 | + if (len == 0) |
291 | + return 0; |
292 | + |
293 | + if (region->virt_addr) { |
294 | + if (sbi->mmap_size >= end) { |
295 | + mmapped = len; |
296 | + } else if (sbi->mmap_size > begin) { |
297 | + mmapped = sbi->mmap_size - begin; |
298 | + } |
299 | + } |
300 | + |
301 | + if (mmapped) { |
302 | + addr = (void *)(region->virt_addr + offset); |
303 | + memcpy(dst, addr, mmapped); |
304 | + } |
305 | + |
306 | + newdst = (void *)(dst + mmapped); |
307 | + left = len - mmapped; |
308 | + |
309 | + if (left == 0) |
310 | + return len; |
311 | + |
312 | + if (AXFS_HAS_BDEV(sb)) { |
313 | + return axfs_copy_block(sb, newdst, begin + mmapped, left); |
314 | + } else if (AXFS_HAS_MTD(sb)) { |
315 | + return axfs_copy_mtd(sb, newdst, begin + mmapped, left); |
316 | + } else { |
317 | + return 0; |
318 | + } |
319 | +} |
320 | + |
321 | +static int axfs_iget5_test(struct inode *inode, void *opaque) |
322 | +{ |
323 | + u64 *inode_number = (u64 *) opaque; |
324 | + |
325 | + if (inode->i_sb == NULL) { |
326 | + printk(KERN_ERR "axfs_iget5_test:" |
327 | + " the super block is set to null\n"); |
328 | + } |
329 | + if (inode->i_ino == *inode_number) |
330 | + return 1; /* matches */ |
331 | + else |
332 | + return 0; /* does not match */ |
333 | +} |
334 | + |
335 | +static int axfs_iget5_set(struct inode *inode, void *opaque) |
336 | +{ |
337 | + u64 *inode_number = (u64 *) opaque; |
338 | + |
339 | + if (inode->i_sb == NULL) { |
340 | + printk(KERN_ERR "axfs_iget5_set:" |
341 | + " the super block is set to null \n"); |
342 | + } |
343 | + inode->i_ino = *inode_number; |
344 | + return 0; |
345 | +} |
346 | + |
347 | +struct inode *axfs_create_vfs_inode(struct super_block *sb, int ino) |
348 | +{ |
349 | + struct axfs_super *sbi = AXFS_SB(sb); |
350 | + struct inode *inode; |
351 | + u64 size; |
352 | + |
353 | + inode = iget5_locked(sb, ino, axfs_iget5_test, axfs_iget5_set, &ino); |
354 | + |
355 | + if (!(inode && (inode->i_state & I_NEW))) |
356 | + return inode; |
357 | + |
358 | + inode->i_mode = AXFS_GET_MODE(sbi, ino); |
359 | + inode->i_uid = AXFS_GET_UID(sbi, ino); |
360 | + size = AXFS_GET_INODE_FILE_SIZE(sbi, ino); |
361 | + inode->i_size = size; |
362 | + inode->i_blocks = AXFS_GET_INODE_NUM_ENTRIES(sbi, ino); |
363 | + inode->i_blkbits = PAGE_CACHE_SIZE * 8; |
364 | + inode->i_gid = AXFS_GET_GID(sbi, ino); |
365 | + |
366 | + inode->i_mtime = inode->i_atime = inode->i_ctime = sbi->timestamp; |
367 | + inode->i_ino = ino; |
368 | + |
369 | + if (S_ISREG(inode->i_mode)) { |
370 | + inode->i_fop = &axfs_fops; |
371 | + inode->i_data.a_ops = &axfs_aops; |
372 | + inode->i_mapping->a_ops = &axfs_aops; |
373 | + } else if (S_ISDIR(inode->i_mode)) { |
374 | + inode->i_op = &axfs_dir_inode_operations; |
375 | + inode->i_fop = &axfs_directory_operations; |
376 | + } else if (S_ISLNK(inode->i_mode)) { |
377 | + inode->i_op = &page_symlink_inode_operations; |
378 | + inode->i_data.a_ops = &axfs_aops; |
379 | + } else { |
380 | + inode->i_size = 0; |
381 | + inode->i_blocks = 0; |
382 | + init_special_inode(inode, inode->i_mode, old_decode_dev(size)); |
383 | + } |
384 | + unlock_new_inode(inode); |
385 | + |
386 | + return inode; |
387 | +} |
388 | + |
389 | +#ifdef VM_MIXEDMAP |
390 | +#else |
391 | +static int axfs_insert_pfns(struct file *file, struct vm_area_struct *vma) |
392 | +{ |
393 | + struct inode *inode = file->f_dentry->d_inode; |
394 | + struct super_block *sb = inode->i_sb; |
395 | + struct axfs_super *sbi = AXFS_SB(sb); |
396 | + unsigned long array_index, length, offset, count, xip_addr, addr, pfn; |
397 | + unsigned int numpages; |
398 | + u64 ino_number = inode->i_ino; |
399 | + int error; |
400 | + |
401 | + offset = vma->vm_pgoff; |
402 | + |
403 | + array_index = AXFS_GET_INODE_ARRAY_INDEX(sbi, ino_number); |
404 | + array_index += offset; |
405 | + length = vma->vm_end - vma->vm_start; |
406 | + |
407 | + if (length > inode->i_size) |
408 | + length = inode->i_size; |
409 | + |
410 | + length = PAGE_ALIGN(length); |
411 | + numpages = length >> PAGE_SHIFT; |
412 | + |
413 | + for (count = 0; count < numpages; count++, array_index++) { |
414 | + if (!AXFS_IS_NODE_XIP(sbi, array_index)) |
415 | + continue; |
416 | +#ifdef VM_XIP |
417 | + vma->vm_flags |= (VM_IO | VM_XIP); |
418 | +#endif |
419 | + addr = vma->vm_start + (PAGE_SIZE * count); |
420 | + xip_addr = AXFS_GET_XIP_REGION_PHYSADDR(sbi); |
421 | + xip_addr += AXFS_GET_NODE_INDEX(sbi, array_index) << PAGE_SHIFT; |
422 | + pfn = xip_addr >> PAGE_SHIFT; |
423 | + |
424 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0) |
425 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
426 | + error = vm_insert_pfn(vma, addr, pfn); |
427 | +#else |
428 | + error = |
429 | + remap_pfn_range(vma, addr, pfn, PAGE_SIZE, |
430 | + vma->vm_page_prot); |
431 | +#endif |
432 | +#else |
433 | + xip_addr = pfn << PAGE_SHIFT; |
434 | + error = |
435 | + remap_page_range(vma, addr, xip_addr, PAGE_SIZE, |
436 | + vma->vm_page_prot); |
437 | +#endif |
438 | + if (error) |
439 | + return error; |
440 | + } |
441 | + |
442 | + return 0; |
443 | +} |
444 | +#endif |
445 | + |
446 | +static int axfs_mmap(struct file *file, struct vm_area_struct *vma) |
447 | +{ |
448 | + |
449 | + file_accessed(file); |
450 | + |
451 | + vma->vm_ops = &axfs_vm_ops; |
452 | + |
453 | +#ifdef VM_MIXEDMAP |
454 | +#ifdef VM_CAN_NONLINEAR |
455 | + vma->vm_flags |= VM_CAN_NONLINEAR | VM_MIXEDMAP; |
456 | +#else |
457 | + vma->vm_flags | = VM_IO | VM_MIXEDMAP; |
458 | +#endif |
459 | +#else |
460 | +#ifdef VM_PFNMAP |
461 | + vma->vm_flags |= VM_IO | VM_PFNMAP; |
462 | +#else |
463 | + vma->vm_flags |= VM_IO; |
464 | +#endif |
465 | +#endif |
466 | +#ifdef VM_XIP |
467 | + vma->vm_flags |= VM_XIP; |
468 | +#endif |
469 | + |
470 | +#ifdef VM_MIXEDMAP |
471 | + return 0; |
472 | +#else |
473 | + return axfs_insert_pfns(file, vma); |
474 | +#endif |
475 | +} |
476 | + |
477 | +static struct dentry *axfs_lookup(struct inode *dir, struct dentry *dentry, |
478 | + struct nameidata *nd) |
479 | +{ |
480 | + struct super_block *sb = dir->i_sb; |
481 | + struct axfs_super *sbi = AXFS_SB(sb); |
482 | + u64 ino_number = dir->i_ino; |
483 | + u64 dir_index = 0; |
484 | + u64 entry; |
485 | + char *name; |
486 | + int namelen, err; |
487 | + |
488 | + while (dir_index < AXFS_GET_INODE_NUM_ENTRIES(sbi, ino_number)) { |
489 | + entry = AXFS_GET_INODE_ARRAY_INDEX(sbi, ino_number); |
490 | + entry += dir_index; |
491 | + |
492 | + name = AXFS_GET_INODE_NAME(sbi, entry); |
493 | + namelen = strlen(name); |
494 | + |
495 | + /* fast test, the entries are sorted alphabetically and the |
496 | + * first letter is smaller than the first letter in the search |
497 | + * name then it isn't in this directory. Keeps this loop from |
498 | + * needing to scan through always. |
499 | + */ |
500 | + if (dentry->d_name.name[0] < name[0]) |
501 | + break; |
502 | + |
503 | + dir_index++; |
504 | + |
505 | + /* Quick check that the name is roughly the right length */ |
506 | + if (dentry->d_name.len != namelen) |
507 | + continue; |
508 | + |
509 | + err = memcmp(dentry->d_name.name, name, namelen); |
510 | + if (err > 0) |
511 | + continue; |
512 | + |
513 | + /* The file name isn't present in the directory. */ |
514 | + if (err < 0) |
515 | + break; |
516 | + |
517 | + d_add(dentry, axfs_create_vfs_inode(dir->i_sb, entry)); |
518 | + goto out; |
519 | + |
520 | + } |
521 | + d_add(dentry, NULL); |
522 | + |
523 | +out: |
524 | + return NULL; |
525 | +} |
526 | + |
527 | +static int axfs_readdir(struct file *filp, void *dirent, filldir_t filldir) |
528 | +{ |
529 | + struct inode *inode = filp->f_dentry->d_inode; |
530 | + struct super_block *sb = inode->i_sb; |
531 | + struct axfs_super *sbi = AXFS_SB(sb); |
532 | + u64 ino_number = inode->i_ino; |
533 | + u64 entry; |
534 | + loff_t dir_index; |
535 | + char *name; |
536 | + int namelen, mode; |
537 | + int err = 0; |
538 | + |
539 | + /* Get the current index into the directory and verify it is not beyond |
540 | + the end of the list */ |
541 | + dir_index = filp->f_pos; |
542 | + if (dir_index >= AXFS_GET_INODE_NUM_ENTRIES(sbi, ino_number)) |
543 | + goto out; |
544 | + |
545 | + /* Verify the inode is for a directory */ |
546 | + if (!(S_ISDIR(inode->i_mode))) { |
547 | + err = -EINVAL; |
548 | + goto out; |
549 | + } |
550 | + |
551 | + while (dir_index < AXFS_GET_INODE_NUM_ENTRIES(sbi, ino_number)) { |
552 | + entry = AXFS_GET_INODE_ARRAY_INDEX(sbi, ino_number) + dir_index; |
553 | + |
554 | + name = (char *)AXFS_GET_INODE_NAME(sbi, entry); |
555 | + namelen = strlen(name); |
556 | + |
557 | + mode = (int)AXFS_GET_MODE(sbi, entry); |
558 | + err = filldir(dirent, name, namelen, dir_index, entry, mode); |
559 | + |
560 | + if (err) |
561 | + break; |
562 | + |
563 | + dir_index++; |
564 | + filp->f_pos = dir_index; |
565 | + } |
566 | + |
567 | +out: |
568 | + return 0; |
569 | +} |
570 | + |
571 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22) |
572 | +/****************************************************************************** |
573 | + * |
574 | + * axfs_fault |
575 | + * |
576 | + * Description: This function is mapped into the VMA operations vector, and |
577 | + * gets called on a page fault. Depending on whether the page |
578 | + * is XIP or compressed, xip_file_fault or filemap_fault is |
579 | + * called. This function also logs when a fault occurs when |
580 | + * profiling is on. |
581 | + * |
582 | + * Parameters: |
583 | + * (IN) vma - The virtual memory area corresponding to a file |
584 | + * |
585 | + * (IN) vmf - The fault info pass in by the fault handler |
586 | + * |
587 | + * Returns: |
588 | + * 0 or error number |
589 | + * |
590 | + *****************************************************************************/ |
591 | +static int axfs_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
592 | +#else |
593 | +static struct page *axfs_nopage(struct vm_area_struct *vma, |
594 | + unsigned long address, int *type) |
595 | +#endif |
596 | +{ |
597 | + struct file *file = vma->vm_file; |
598 | + struct inode *inode = file->f_dentry->d_inode; |
599 | + struct super_block *sb = inode->i_sb; |
600 | + struct axfs_super *sbi = AXFS_SB(sb); |
601 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22) |
602 | +#else |
603 | + unsigned long pgoff; |
604 | +#endif |
605 | + u64 ino_number = inode->i_ino; |
606 | + u64 array_index; |
607 | + |
608 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22) |
609 | + array_index = AXFS_GET_INODE_ARRAY_INDEX(sbi, ino_number) + vmf->pgoff; |
610 | +#else |
611 | + pgoff = ((address - vma->vm_start) >> PAGE_CACHE_SHIFT) + vma->vm_pgoff; |
612 | + array_index = AXFS_GET_INODE_ARRAY_INDEX(sbi, ino_number) + pgoff; |
613 | +#endif |
614 | + |
615 | + /* if that pages are marked for write they will probably end up in RAM |
616 | + therefore we don't want their counts for being XIP'd */ |
617 | + if (!(vma->vm_flags & VM_WRITE)) |
618 | + axfs_profiling_add(sbi, array_index, ino_number); |
619 | + |
620 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
621 | + /* figure out if the node is XIP or compressed and call the |
622 | + appropriate function |
623 | + */ |
624 | +#ifdef VM_MIXEDMAP |
625 | + if (AXFS_IS_NODE_XIP(sbi, array_index)) |
626 | +#else |
627 | + if (AXFS_IS_NODE_XIP(sbi, array_index) && !AXFS_PHYSADDR_IS_VALID(sbi)) |
628 | +#endif |
629 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22) |
630 | + return xip_file_fault(vma, vmf); |
631 | +#else |
632 | + return xip_file_nopage(vma, address, type); |
633 | +#endif |
634 | +#endif |
635 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22) |
636 | + return filemap_fault(vma, vmf); |
637 | +#else |
638 | + return filemap_nopage(vma, address, type); |
639 | +#endif |
640 | + |
641 | +} |
642 | + |
643 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22) |
644 | +#else |
645 | +static ssize_t axfs_xip_file_read(struct file *filp, char __user *buf, |
646 | + size_t len, loff_t *ppos) |
647 | +{ |
648 | + struct address_space *mapping = filp->f_mapping; |
649 | + struct inode *inode = mapping->host; |
650 | + unsigned long index, end_index, offset; |
651 | + loff_t isize, pos; |
652 | + size_t copied = 0, error = 0; |
653 | + |
654 | + pos = *ppos; |
655 | + index = pos >> PAGE_CACHE_SHIFT; |
656 | + offset = pos & ~PAGE_CACHE_MASK; |
657 | + |
658 | + isize = i_size_read(inode); |
659 | + if (!isize) |
660 | + goto out; |
661 | + |
662 | + end_index = (isize - 1) >> PAGE_CACHE_SHIFT; |
663 | + do { |
664 | + unsigned long nr, left, pfn; |
665 | + void *xip_mem; |
666 | + int zero = 0; |
667 | + |
668 | + /* nr is the maximum number of bytes to copy from this page */ |
669 | + nr = PAGE_CACHE_SIZE; |
670 | + if (index >= end_index) { |
671 | + if (index > end_index) |
672 | + goto out; |
673 | + nr = ((isize - 1) & ~PAGE_CACHE_MASK) + 1; |
674 | + if (nr <= offset) |
675 | + goto out; |
676 | + } |
677 | + nr = nr - offset; |
678 | + if (nr > len) |
679 | + nr = len; |
680 | + axfs_get_xip_mem(mapping, index, 0, &xip_mem, &pfn); |
681 | + if (!xip_mem) { |
682 | + error = -EIO; |
683 | + goto out; |
684 | + } |
685 | + if (unlikely(IS_ERR(xip_mem))) { |
686 | + if (PTR_ERR(xip_mem) == -ENODATA) { |
687 | + /* sparse */ |
688 | + zero = 1; |
689 | + } else { |
690 | + error = PTR_ERR(xip_mem); |
691 | + goto out; |
692 | + } |
693 | + } |
694 | + /* |
695 | + * Ok, we have the mem, so now we can copy it to user space... |
696 | + * |
697 | + * The actor routine returns how many bytes were actually used.. |
698 | + * NOTE! This may not be the same as how much of a user buffer |
699 | + * we filled up (we may be padding etc), so we can only update |
700 | + * "pos" here (the actor routine has to update the user buffer |
701 | + * pointers and the remaining count). |
702 | + */ |
703 | + if (!zero) |
704 | + left = |
705 | + __copy_to_user(buf + copied, xip_mem + offset, nr); |
706 | + else |
707 | + left = __clear_user(buf + copied, nr); |
708 | + |
709 | + if (left) { |
710 | + error = -EFAULT; |
711 | + goto out; |
712 | + } |
713 | + |
714 | + copied += (nr - left); |
715 | + offset += (nr - left); |
716 | + index += offset >> PAGE_CACHE_SHIFT; |
717 | + offset &= ~PAGE_CACHE_MASK; |
718 | + } while (copied < len); |
719 | + |
720 | +out: |
721 | + *ppos = pos + copied; |
722 | + if (filp) |
723 | + file_accessed(filp); |
724 | + |
725 | + return (copied ? copied : error); |
726 | +} |
727 | +#endif |
728 | + |
729 | +/****************************************************************************** |
730 | + * |
731 | + * axfs_file_read |
732 | + * |
733 | + * Description: axfs_file_read is mapped into the file_operations vector for |
734 | + * all axfs files. It loops through the pages to be read and calls |
735 | + * either do_sync_read (if the page is a compressed one) or |
736 | + * xip_file_read (if the page is XIP). |
737 | + * |
738 | + * Parameters: |
739 | + * (IN) filp - file to be read |
740 | + * |
741 | + * (OUT) buf - user buffer that is filled with the data that we read. |
742 | + * |
743 | + * (IN) len - length of file to be read |
744 | + * |
745 | + * (IN) ppos - offset within the file to read from |
746 | + * |
747 | + * Returns: |
748 | + * actual size of data read. |
749 | + * |
750 | + *****************************************************************************/ |
751 | +static ssize_t axfs_file_read(struct file *filp, char __user *buf, size_t len, |
752 | + loff_t *ppos) |
753 | +{ |
754 | + struct inode *inode = filp->f_dentry->d_inode; |
755 | + struct super_block *sb = inode->i_sb; |
756 | + struct axfs_super *sbi = AXFS_SB(sb); |
757 | + size_t read = 0, total_read = 0; |
758 | + size_t readlength, actual_size, file_size, remaining; |
759 | + u64 ino_number = inode->i_ino; |
760 | + u64 size, array_index; |
761 | + |
762 | + file_size = AXFS_GET_INODE_FILE_SIZE(sbi, ino_number); |
763 | + remaining = file_size - *ppos; |
764 | + actual_size = len > remaining ? remaining : len; |
765 | + readlength = actual_size < PAGE_SIZE ? actual_size : PAGE_SIZE; |
766 | + |
767 | + for (size = actual_size; size > 0; size -= read) { |
768 | + array_index = AXFS_GET_INODE_ARRAY_INDEX(sbi, ino_number); |
769 | + array_index += *ppos >> PAGE_SHIFT; |
770 | + |
771 | + if (AXFS_IS_NODE_XIP(sbi, array_index)) { |
772 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22) |
773 | + read = xip_file_read(filp, buf, readlength, ppos); |
774 | +#else |
775 | + read = axfs_xip_file_read(filp, buf, readlength, ppos); |
776 | +#endif |
777 | + } else { |
778 | + read = do_sync_read(filp, buf, readlength, ppos); |
779 | + } |
780 | + buf += read; |
781 | + total_read += read; |
782 | + |
783 | + if ((len - total_read < PAGE_SIZE) && (total_read != len)) |
784 | + readlength = len - total_read; |
785 | + } |
786 | + |
787 | + return total_read; |
788 | +} |
789 | + |
790 | +static int axfs_readpage(struct file *file, struct page *page) |
791 | +{ |
792 | + struct inode *inode = page->mapping->host; |
793 | + struct super_block *sb = inode->i_sb; |
794 | + struct axfs_super *sbi = AXFS_SB(sb); |
795 | + u64 array_index, node_index, cnode_index, maxblock, ofs; |
796 | + u64 ino_number = inode->i_ino; |
797 | + u32 max_len, cnode_offset; |
798 | + u32 cblk_size = sbi->cblock_size; |
799 | + u32 len = 0; |
800 | + u8 node_type; |
801 | + void *pgdata; |
802 | + void *src; |
803 | + void *cblk0 = sbi->cblock_buffer[0]; |
804 | + void *cblk1 = sbi->cblock_buffer[1]; |
805 | + |
806 | + maxblock = (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
807 | + pgdata = kmap(page); |
808 | + |
809 | + if (page->index >= maxblock) |
810 | + goto out; |
811 | + |
812 | + array_index = AXFS_GET_INODE_ARRAY_INDEX(sbi, ino_number); |
813 | + array_index += page->index; |
814 | + |
815 | + node_index = AXFS_GET_NODE_INDEX(sbi, array_index); |
816 | + node_type = AXFS_GET_NODE_TYPE(sbi, array_index); |
817 | + |
818 | + if (node_type == Compressed) { |
819 | + /* node is in compessed region */ |
820 | + cnode_offset = AXFS_GET_CNODE_OFFSET(sbi, node_index); |
821 | + cnode_index = AXFS_GET_CNODE_INDEX(sbi, node_index); |
822 | + down_write(&sbi->lock); |
823 | + if (cnode_index != sbi->current_cnode_index) { |
824 | + /* uncompress only necessary if different cblock */ |
825 | + ofs = AXFS_GET_CBLOCK_OFFSET(sbi, cnode_index); |
826 | + len = AXFS_GET_CBLOCK_OFFSET(sbi, cnode_index + 1); |
827 | + len -= ofs; |
828 | + axfs_copy_data(sb, cblk1, &(sbi->compressed), ofs, len); |
829 | + axfs_uncompress_block(cblk0, cblk_size, cblk1, len); |
830 | + sbi->current_cnode_index = cnode_index; |
831 | + } |
832 | + downgrade_write(&sbi->lock); |
833 | + max_len = cblk_size - cnode_offset; |
834 | + len = max_len > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : max_len; |
835 | + src = (void *)((unsigned long)cblk0 + cnode_offset); |
836 | + memcpy(pgdata, src, len); |
837 | + up_read(&sbi->lock); |
838 | + } else if (node_type == Byte_Aligned) { |
839 | + /* node is in BA region */ |
840 | + ofs = AXFS_GET_BANODE_OFFSET(sbi, node_index); |
841 | + max_len = sbi->byte_aligned.size - ofs; |
842 | + len = max_len > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : max_len; |
843 | + axfs_copy_data(sb, pgdata, &(sbi->byte_aligned), ofs, len); |
844 | + } else { |
845 | + /* node is XIP */ |
846 | + ofs = node_index << PAGE_SHIFT; |
847 | + len = PAGE_CACHE_SIZE; |
848 | + axfs_copy_data(sb, pgdata, &(sbi->xip), ofs, len); |
849 | + } |
850 | + |
851 | +out: |
852 | + memset(pgdata + len, 0, PAGE_CACHE_SIZE - len); |
853 | + kunmap(page); |
854 | + flush_dcache_page(page); |
855 | + SetPageUptodate(page); |
856 | + unlock_page(page); |
857 | + return 0; |
858 | +} |
859 | + |
860 | +static int axfs_get_xip_mem(struct address_space *mapping, pgoff_t offset, |
861 | + int create, void **kaddr, unsigned long *pfn) |
862 | +{ |
863 | + struct inode *inode = mapping->host; |
864 | + struct super_block *sb = inode->i_sb; |
865 | + struct axfs_super *sbi = AXFS_SB(sb); |
866 | + u64 ino_number = inode->i_ino; |
867 | + u64 ino_index, node_index; |
868 | + |
869 | + ino_index = AXFS_GET_INODE_ARRAY_INDEX(sbi, ino_number); |
870 | + ino_index += offset; |
871 | + |
872 | + node_index = AXFS_GET_NODE_INDEX(sbi, ino_index); |
873 | + |
874 | + *kaddr = (void *)(sbi->xip.virt_addr + (node_index << PAGE_SHIFT)); |
875 | + if (AXFS_PHYSADDR_IS_VALID(sbi)) { |
876 | + *pfn = (AXFS_GET_XIP_REGION_PHYSADDR(sbi) >> PAGE_SHIFT); |
877 | + *pfn += node_index; |
878 | + } else { |
879 | + *pfn = page_to_pfn(virt_to_page((unsigned long)*kaddr)); |
880 | + } |
881 | + |
882 | + return 0; |
883 | +} |
884 | + |
885 | +#ifdef VM_MIXEDMAP |
886 | +#else |
887 | + |
888 | +struct page *axfs_get_xip_page(struct address_space *mapping, sector_t offset, |
889 | + int create) |
890 | +{ |
891 | + unsigned long pfn; |
892 | + void *kaddr; |
893 | + |
894 | + axfs_get_xip_mem(mapping, offset * 512, create, &kaddr, &pfn); |
895 | + |
896 | + return virt_to_page(kaddr); |
897 | +} |
898 | +#endif |
899 | diff -Naur linux-2.6.24/fs/axfs/axfs_mtd.c linux-2.6.24-axfs/fs/axfs/axfs_mtd.c |
900 | --- linux-2.6.24/fs/axfs/axfs_mtd.c 1970-01-01 01:00:00.000000000 +0100 |
901 | +++ linux-2.6.24-axfs/fs/axfs/axfs_mtd.c 2008-08-24 19:12:32.000000000 +0200 |
902 | @@ -0,0 +1,506 @@ |
903 | +/* |
904 | + * Advanced XIP File System for Linux - AXFS |
905 | + * Readonly, compressed, and XIP filesystem for Linux systems big and small |
906 | + * |
907 | + * Copyright(c) 2008 Numonyx |
908 | + * |
909 | + * This program is free software; you can redistribute it and/or modify it |
910 | + * under the terms and conditions of the GNU General Public License, |
911 | + * version 2, as published by the Free Software Foundation. |
912 | + * |
913 | + * Authors: |
914 | + * Jared Hulbert <jaredeh@gmail.com> |
915 | + * |
916 | + * Project url: http://axfs.sourceforge.net |
917 | + * |
918 | + * axfs_mtd.c - |
919 | + * Allows axfs to use mtd devices or has dummy functions if mtd |
920 | + * device support is compiled out of the kernel. |
921 | + */ |
922 | + |
923 | +#include <linux/axfs.h> |
924 | +#include <linux/fs.h> |
925 | +#include <linux/mount.h> |
926 | +#include <linux/ctype.h> |
927 | +#include <linux/namei.h> |
928 | + |
929 | +#ifdef CONFIG_MTD |
930 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
931 | +#include <linux/mtd/super.h> |
932 | +#else |
933 | +#include <linux/mtd/mtd.h> |
934 | +#endif |
935 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,25) |
936 | +#else |
937 | +#define OLD_POINT 1 |
938 | +#endif |
939 | + |
940 | +int axfs_fill_super(struct super_block *, void *, int); |
941 | + |
942 | +static struct mtd_info *axfs_get_mtd_device(int mtdnr) |
943 | +{ |
944 | + struct mtd_info *device; |
945 | + |
946 | + device = get_mtd_device(NULL, mtdnr); |
947 | + |
948 | + if (!PTR_ERR(device)) |
949 | + return NULL; |
950 | + |
951 | + return device; |
952 | +} |
953 | + |
954 | +int axfs_is_dev_mtd(char *path, int *mtdnr) |
955 | +{ |
956 | + char *off = NULL; |
957 | + char *endptr = NULL; |
958 | + char dev[] = "/dev/\0"; |
959 | + char mtd[] = "mtd\0"; |
960 | + char mtdblk[] = "mtdblock\0"; |
961 | + |
962 | + if (!path || !*path) |
963 | + return FALSE; |
964 | + |
965 | + off = path; |
966 | + |
967 | + if (strncmp(dev, off, strlen(dev)) == 0) |
968 | + off += strlen(dev); |
969 | + |
970 | + if (!strncmp(mtd, off, strlen(mtd)) && isdigit(off[strlen(mtd)])) |
971 | + off += strlen(mtd); |
972 | + |
973 | + if (!strncmp(mtdblk, off, strlen(mtdblk)) |
974 | + && isdigit(off[strlen(mtdblk)])) |
975 | + off += strlen(mtdblk); |
976 | + |
977 | + *mtdnr = simple_strtoul(off, &endptr, 0); |
978 | + |
979 | + if (!*endptr) |
980 | + return TRUE; |
981 | + |
982 | + return FALSE; |
983 | +} |
984 | + |
985 | +static struct mtd_info *axfs_get_mtd_info(struct super_block *sb, u64 fsoffset) |
986 | +{ |
987 | + struct axfs_super *sbi = AXFS_SB(sb); |
988 | + |
989 | + if (fsoffset == 0) |
990 | + return (struct mtd_info *)AXFS_MTD0(sb); |
991 | + |
992 | + if (fsoffset < sbi->mmap_size) |
993 | + return (struct mtd_info *)AXFS_MTD0(sb); |
994 | + |
995 | + if (AXFS_MTD1(sb) != NULL) |
996 | + return (struct mtd_info *)AXFS_MTD1(sb); |
997 | + |
998 | + return (struct mtd_info *)AXFS_MTD0(sb); |
999 | +} |
1000 | + |
1001 | +int axfs_copy_mtd(struct super_block *sb, void *dst, u64 fsoffset, u64 len) |
1002 | +{ |
1003 | + struct axfs_super *sbi = AXFS_SB(sb); |
1004 | + u64 offset = AXFS_FSOFFSET_2_DEVOFFSET(sbi, fsoffset); |
1005 | + struct mtd_info *mtd; |
1006 | + u_char *mtdbuf = (u_char *) dst; |
1007 | + size_t retlen; |
1008 | + int err; |
1009 | + |
1010 | + if (len == 0) |
1011 | + return 0; |
1012 | + |
1013 | + mtd = axfs_get_mtd_info(sb, fsoffset); |
1014 | + err = mtd->read(mtd, (loff_t) offset, (size_t) len, &retlen, mtdbuf); |
1015 | + |
1016 | + if (len != retlen) |
1017 | + return -EIO; |
1018 | + |
1019 | + return err; |
1020 | +} |
1021 | + |
1022 | +/****************************************************************************** |
1023 | + * |
1024 | + * axfs_map_mtd |
1025 | + * |
1026 | + * Description: When provided, uses the mtd point() capability to map allow |
1027 | + * axfs a direct memory access to the filesystem. |
1028 | + * |
1029 | + * Parameters: |
1030 | + * (IN) sb - pointer to the super_block structure |
1031 | + * |
1032 | + * Returns: |
1033 | + * 0 or error number |
1034 | + * |
1035 | + *****************************************************************************/ |
1036 | +int axfs_map_mtd(struct super_block *sb) |
1037 | +{ |
1038 | + struct axfs_super *sbi = AXFS_SB(sb); |
1039 | + struct mtd_info *mtd = (struct mtd_info *)AXFS_MTD0(sb); |
1040 | + size_t retlen; |
1041 | + int err = 0; |
1042 | +#ifndef OLD_POINT |
1043 | + void *virt; |
1044 | + resource_size_t phys; |
1045 | +#else |
1046 | + u_char *virt; |
1047 | +#endif |
1048 | + |
1049 | + if (!mtd->point || !mtd->unpoint) |
1050 | + return 0; |
1051 | + |
1052 | +#ifndef OLD_POINT |
1053 | + err = mtd->point(mtd, 0, sbi->mmap_size, &retlen, &virt, &phys); |
1054 | +#else |
1055 | + err = mtd->point(mtd, 0, sbi->mmap_size, &retlen, &virt); |
1056 | +#endif |
1057 | + if (err) |
1058 | + return err; |
1059 | + |
1060 | + if (retlen != sbi->mmap_size) { |
1061 | +#ifndef OLD_POINT |
1062 | + mtd->unpoint(mtd, 0, retlen); |
1063 | +#else |
1064 | + mtd->unpoint(mtd, 0, 0, retlen); |
1065 | +#endif |
1066 | + return -EINVAL; |
1067 | + } |
1068 | + |
1069 | + sbi->virt_start_addr = (unsigned long)virt; |
1070 | +#ifndef OLD_POINT |
1071 | + sbi->phys_start_addr = (unsigned long)phys; |
1072 | +#else |
1073 | + sbi->phys_start_addr = 0; |
1074 | +#endif |
1075 | + sbi->mtd_pointed = TRUE; |
1076 | + |
1077 | + return 0; |
1078 | +} |
1079 | + |
1080 | +void axfs_unmap_mtd(struct super_block *sb) |
1081 | +{ |
1082 | + struct axfs_super *sbi = AXFS_SB(sb); |
1083 | + struct mtd_info *mtd = (struct mtd_info *)AXFS_MTD0(sb); |
1084 | + |
1085 | + if (!sbi) |
1086 | + return; |
1087 | + |
1088 | + if (AXFS_MTD1(sb)) |
1089 | + put_mtd_device((struct mtd_info *)AXFS_MTD1(sb)); |
1090 | + |
1091 | + if (AXFS_IS_POINTED(sbi)) { |
1092 | +#ifndef OLD_POINT |
1093 | + mtd->unpoint(mtd, 0, sbi->mmap_size); |
1094 | +#else |
1095 | + mtd->unpoint(mtd, 0, 0, sbi->mmap_size); |
1096 | +#endif |
1097 | + } else { |
1098 | + if (AXFS_MTD0(sb)) |
1099 | + put_mtd_device((struct mtd_info *)AXFS_MTD0(sb)); |
1100 | + } |
1101 | +} |
1102 | + |
1103 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
1104 | +#else |
1105 | +/* -------------------- START COPY FROM 2.6.22 -------------------------- */ |
1106 | +/* MTD-based superblock management |
1107 | + * |
1108 | + * Copyright © 2001-2007 Red Hat, Inc. All Rights Reserved. |
1109 | + * Written by: David Howells <dhowells@redhat.com> |
1110 | + * David Woodhouse <dwmw2@infradead.org> |
1111 | + * |
1112 | + * This program is free software; you can redistribute it and/or |
1113 | + * modify it under the terms of the GNU General Public License |
1114 | + * as published by the Free Software Foundation; either version |
1115 | + * 2 of the License, or (at your option) any later version. |
1116 | + */ |
1117 | + |
1118 | +/* |
1119 | + * compare superblocks to see if they're equivalent |
1120 | + * - they are if the underlying MTD device is the same |
1121 | + */ |
1122 | +static int get_sb_mtd_compare(struct super_block *sb, void *_mtd) |
1123 | +{ |
1124 | + struct mtd_info *mtd = _mtd; |
1125 | + struct mtd_info *s_mtd = (struct mtd_info *)AXFS_MTD0(sb); |
1126 | + |
1127 | + if (s_mtd == mtd) { |
1128 | + DEBUG(2, "MTDSB: Match on device %d (\"%s\")\n", |
1129 | + mtd->index, mtd->name); |
1130 | + return 1; |
1131 | + } |
1132 | + |
1133 | + DEBUG(2, "MTDSB: No match, device %d (\"%s\"), device %d (\"%s\")\n", |
1134 | + s_mtd->index, s_mtd->name, mtd->index, mtd->name); |
1135 | + return 0; |
1136 | +} |
1137 | + |
1138 | +/* |
1139 | + * mark the superblock by the MTD device it is using |
1140 | + * - set the device number to be the correct MTD block device for pesuperstence |
1141 | + * of NFS exports |
1142 | + */ |
1143 | +static int get_sb_mtd_set(struct super_block *sb, void *_mtd) |
1144 | +{ |
1145 | + struct mtd_info *mtd = _mtd; |
1146 | + struct mtd_info *s_mtd = (struct mtd_info *)AXFS_MTD0(sb); |
1147 | + |
1148 | + s_mtd = mtd; |
1149 | + sb->s_dev = MKDEV(MTD_BLOCK_MAJOR, mtd->index); |
1150 | + return 0; |
1151 | +} |
1152 | + |
1153 | +/* Lifted wholesale from 2.6.22 */ |
1154 | +int simple_set_mnt(struct vfsmount *mnt, struct super_block *sb) |
1155 | +{ |
1156 | + mnt->mnt_sb = sb; |
1157 | + mnt->mnt_root = dget(sb->s_root); |
1158 | + return 0; |
1159 | +} |
1160 | + |
1161 | +/* |
1162 | + * get a superblock on an MTD-backed filesystem |
1163 | + */ |
1164 | +static int get_sb_mtd_aux(struct file_system_type *fs_type, int flags, |
1165 | + const char *dev_name, void *data, |
1166 | + struct mtd_info *mtd, |
1167 | + int (*fill_super) (struct super_block *, void *, int), |
1168 | + struct vfsmount *mnt) |
1169 | +{ |
1170 | + struct super_block *sb; |
1171 | + int ret; |
1172 | + |
1173 | + sb = sget(fs_type, get_sb_mtd_compare, get_sb_mtd_set, mtd); |
1174 | + if (IS_ERR(sb)) |
1175 | + goto out_error; |
1176 | + |
1177 | + if (sb->s_root) |
1178 | + goto already_mounted; |
1179 | + |
1180 | + /* fresh new superblock */ |
1181 | + DEBUG(1, "MTDSB: New superblock for device %d (\"%s\")\n", |
1182 | + mtd->index, mtd->name); |
1183 | + |
1184 | + ret = fill_super(sb, data, 0); |
1185 | + if (ret < 0) { |
1186 | + up_write(&sb->s_umount); |
1187 | + deactivate_super(sb); |
1188 | + return ret; |
1189 | + } |
1190 | + |
1191 | + /* go */ |
1192 | + sb->s_flags |= MS_ACTIVE; |
1193 | + return simple_set_mnt(mnt, sb); |
1194 | + |
1195 | + /* new mountpoint for an already mounted superblock */ |
1196 | + already_mounted: |
1197 | + DEBUG(1, "MTDSB: Device %d (\"%s\") is already mounted\n", |
1198 | + mtd->index, mtd->name); |
1199 | + ret = simple_set_mnt(mnt, sb); |
1200 | + goto out_put; |
1201 | + |
1202 | + out_error: |
1203 | + ret = PTR_ERR(sb); |
1204 | + out_put: |
1205 | + put_mtd_device(mtd); |
1206 | + return ret; |
1207 | +} |
1208 | + |
1209 | +/* |
1210 | + * get a superblock on an MTD-backed filesystem by MTD device number |
1211 | + */ |
1212 | +static int get_sb_mtd_nr(struct file_system_type *fs_type, int flags, |
1213 | + const char *dev_name, void *data, int mtdnr, |
1214 | + int (*fill_super) (struct super_block *, void *, int), |
1215 | + struct vfsmount *mnt) |
1216 | +{ |
1217 | + struct mtd_info *mtd; |
1218 | + |
1219 | + mtd = get_mtd_device(NULL, mtdnr); |
1220 | + if (IS_ERR(mtd)) { |
1221 | + DEBUG(0, "MTDSB: Device #%u doesn't appear to exist\n", mtdnr); |
1222 | + return PTR_ERR(mtd); |
1223 | + } |
1224 | + |
1225 | + return get_sb_mtd_aux(fs_type, flags, dev_name, data, mtd, fill_super, |
1226 | + mnt); |
1227 | +} |
1228 | + |
1229 | +/* |
1230 | + * set up an MTD-based superblock |
1231 | + */ |
1232 | +static int get_sb_mtd(struct file_system_type *fs_type, int flags, |
1233 | + const char *dev_name, void *data, |
1234 | + int (*fill_super) (struct super_block *, void *, int), |
1235 | + struct vfsmount *mnt) |
1236 | +{ |
1237 | + struct nameidata nd; |
1238 | + int mtdnr, ret; |
1239 | + |
1240 | + if (!dev_name) |
1241 | + return -EINVAL; |
1242 | + |
1243 | + DEBUG(2, "MTDSB: dev_name \"%s\"\n", dev_name); |
1244 | + |
1245 | + /* the preferred way of mounting in future; especially when |
1246 | + * CONFIG_BLOCK=n - we specify the underlying MTD device by number or |
1247 | + * by name, so that we don't require block device support to be present |
1248 | + * in the kernel. */ |
1249 | + if (dev_name[0] == 'm' && dev_name[1] == 't' && dev_name[2] == 'd') { |
1250 | + if (dev_name[3] == ':') { |
1251 | + struct mtd_info *mtd; |
1252 | + |
1253 | + /* mount by MTD device name */ |
1254 | + DEBUG(1, "MTDSB: mtd:%%s, name \"%s\"\n", dev_name + 4); |
1255 | + |
1256 | + for (mtdnr = 0; mtdnr < MAX_MTD_DEVICES; mtdnr++) { |
1257 | + mtd = get_mtd_device(NULL, mtdnr); |
1258 | + if (!IS_ERR(mtd)) { |
1259 | + if (!strcmp(mtd->name, dev_name + 4)) |
1260 | + return get_sb_mtd_aux(fs_type, |
1261 | + flags, |
1262 | + dev_name, |
1263 | + data, mtd, |
1264 | + fill_super, |
1265 | + mnt); |
1266 | + |
1267 | + put_mtd_device(mtd); |
1268 | + } |
1269 | + } |
1270 | + |
1271 | + printk(KERN_NOTICE "MTD:" |
1272 | + " MTD device with name \"%s\" not found.\n", |
1273 | + dev_name + 4); |
1274 | + |
1275 | + } else if (isdigit(dev_name[3])) { |
1276 | + /* mount by MTD device number name */ |
1277 | + char *endptr; |
1278 | + |
1279 | + mtdnr = simple_strtoul(dev_name + 3, &endptr, 0); |
1280 | + if (!*endptr) { |
1281 | + /* It was a valid number */ |
1282 | + DEBUG(1, "MTDSB: mtd%%d, mtdnr %d\n", mtdnr); |
1283 | + return get_sb_mtd_nr(fs_type, flags, |
1284 | + dev_name, data, |
1285 | + mtdnr, fill_super, mnt); |
1286 | + } |
1287 | + } |
1288 | + } |
1289 | + |
1290 | + /* try the old way - the hack where we allowed users to mount |
1291 | + * /dev/mtdblock$(n) but didn't actually _use_ the blockdev |
1292 | + */ |
1293 | + ret = path_lookup(dev_name, LOOKUP_FOLLOW, &nd); |
1294 | + |
1295 | + DEBUG(1, "MTDSB: path_lookup() returned %d, inode %p\n", |
1296 | + ret, nd.dentry ? nd.dentry->d_inode : NULL); |
1297 | + |
1298 | + if (ret) |
1299 | + return ret; |
1300 | + |
1301 | + ret = -EINVAL; |
1302 | + |
1303 | + if (!S_ISBLK(nd.dentry->d_inode->i_mode)) |
1304 | + goto out; |
1305 | + |
1306 | + if (nd.mnt->mnt_flags & MNT_NODEV) { |
1307 | + ret = -EACCES; |
1308 | + goto out; |
1309 | + } |
1310 | + |
1311 | + if (imajor(nd.dentry->d_inode) != MTD_BLOCK_MAJOR) |
1312 | + goto not_an_MTD_device; |
1313 | + |
1314 | + mtdnr = iminor(nd.dentry->d_inode); |
1315 | + path_release(&nd); |
1316 | + |
1317 | + return get_sb_mtd_nr(fs_type, flags, dev_name, data, mtdnr, fill_super, |
1318 | + mnt); |
1319 | + |
1320 | + not_an_MTD_device: |
1321 | + printk(KERN_NOTICE |
1322 | + "MTD: Attempt to mount non-MTD device \"%s\"\n", dev_name); |
1323 | + out: |
1324 | + path_release(&nd); |
1325 | + return ret; |
1326 | + |
1327 | +} |
1328 | + |
1329 | +/* |
1330 | + * destroy an MTD-based superblock |
1331 | + */ |
1332 | +static void kill_mtd_super(struct super_block *sb) |
1333 | +{ |
1334 | + struct mtd_info *s_mtd = (struct mtd_info *)AXFS_MTD0(sb); |
1335 | + generic_shutdown_super(sb); |
1336 | + put_mtd_device(s_mtd); |
1337 | + AXFS_MTD0(sb) = NULL; |
1338 | +} |
1339 | + |
1340 | +/* ---------------------- END COPY --------------------------------------*/ |
1341 | +#endif |
1342 | + |
1343 | +int axfs_get_sb_mtd(struct file_system_type *fs_type, int flags, |
1344 | + const char *dev_name, struct axfs_super *sbi, |
1345 | + struct vfsmount *mnt, int *err) |
1346 | +{ |
1347 | + int nflags, mtdnr; |
1348 | + |
1349 | + if (axfs_is_dev_mtd(sbi->second_dev, &mtdnr)) { |
1350 | + sbi->mtd1 = (void *)axfs_get_mtd_device(mtdnr); |
1351 | + if (!sbi->mtd1) { |
1352 | + *err = -EINVAL; |
1353 | + return FALSE; |
1354 | + } |
1355 | + } |
1356 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
1357 | + nflags = flags & MS_SILENT; |
1358 | +#else |
1359 | + nflags = flags; |
1360 | +#endif |
1361 | + |
1362 | + *err = get_sb_mtd(fs_type, nflags, dev_name, sbi, axfs_fill_super, mnt); |
1363 | + if (*err) |
1364 | + return FALSE; |
1365 | + |
1366 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,21) |
1367 | + sbi->mtd0 = mnt->mnt_sb->s_mtd; |
1368 | +#endif |
1369 | + return TRUE; |
1370 | +} |
1371 | + |
1372 | +void axfs_kill_mtd_super(struct super_block *sb) |
1373 | +{ |
1374 | + kill_mtd_super(sb); |
1375 | +} |
1376 | +#else |
1377 | + |
1378 | +int axfs_map_mtd(struct super_block *sb) |
1379 | +{ |
1380 | + return 0; |
1381 | +} |
1382 | + |
1383 | +void axfs_unmap_mtd(struct super_block *sb) |
1384 | +{ |
1385 | +} |
1386 | + |
1387 | +int axfs_copy_mtd(struct super_block *sb, void *dst, u64 fsoffset, u64 len) |
1388 | +{ |
1389 | + return -EINVAL; |
1390 | +} |
1391 | + |
1392 | +int axfs_get_sb_mtd(struct file_system_type *fs_type, int flags, |
1393 | + const char *dev_name, char *second_dev, |
1394 | + struct axfs_super *sbi, struct vfsmount *mnt, int *err) |
1395 | +{ |
1396 | + return FALSE; |
1397 | +} |
1398 | + |
1399 | +int axfs_is_dev_mtd(char *path, int *mtdnr) |
1400 | +{ |
1401 | + return FALSE; |
1402 | +} |
1403 | + |
1404 | +void axfs_kill_mtd_super(struct super_block *sb) |
1405 | +{ |
1406 | +} |
1407 | + |
1408 | +#endif /* CONFIG_MTD */ |
1409 | diff -Naur linux-2.6.24/fs/axfs/axfs_physmem.c linux-2.6.24-axfs/fs/axfs/axfs_physmem.c |
1410 | --- linux-2.6.24/fs/axfs/axfs_physmem.c 1970-01-01 01:00:00.000000000 +0100 |
1411 | +++ linux-2.6.24-axfs/fs/axfs/axfs_physmem.c 2008-08-24 19:12:32.000000000 +0200 |
1412 | @@ -0,0 +1,69 @@ |
1413 | +/* |
1414 | + * Advanced XIP File System for Linux - AXFS |
1415 | + * Readonly, compressed, and XIP filesystem for Linux systems big and small |
1416 | + * |
1417 | + * Copyright(c) 2008 Numonyx |
1418 | + * |
1419 | + * This program is free software; you can redistribute it and/or modify it |
1420 | + * under the terms and conditions of the GNU General Public License, |
1421 | + * version 2, as published by the Free Software Foundation. |
1422 | + * |
1423 | + * Authors: |
1424 | + * Jared Hulbert <jaredeh@gmail.com> |
1425 | + * |
1426 | + * Project url: http://axfs.sourceforge.net |
1427 | + * |
1428 | + * axfs_physmem.c - |
1429 | + * Allows axfs to use striaght memory or has dummy functions if |
1430 | + * this is a UML system. |
1431 | + */ |
1432 | + |
1433 | +#include <linux/axfs.h> |
1434 | +#include <linux/fs.h> |
1435 | +#ifdef CONFIG_UML |
1436 | + |
1437 | +void axfs_map_physmem(struct axfs_super *sbi, unsigned long size) |
1438 | +{ |
1439 | +} |
1440 | + |
1441 | +void axfs_unmap_physmem(struct super_block *sb) |
1442 | +{ |
1443 | +} |
1444 | + |
1445 | +#else |
1446 | +#include <asm/io.h> |
1447 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
1448 | +#else |
1449 | +#include <asm/pgtable.h> |
1450 | +#endif |
1451 | + |
1452 | +#ifdef ioremap_cached |
1453 | +#define AXFS_REMAP(a,b) (void __force *)ioremap_cached((a),(b)) |
1454 | +#else |
1455 | +#define AXFS_REMAP(a,b) (void __force *)ioremap((a),(b)) |
1456 | +#endif /* ioremap_cached */ |
1457 | + |
1458 | +void axfs_map_physmem(struct axfs_super *sbi, unsigned long size) |
1459 | +{ |
1460 | + void *addr; |
1461 | + |
1462 | + if (AXFS_IS_PHYSMEM(sbi)) { |
1463 | + addr = AXFS_REMAP(sbi->phys_start_addr, size); |
1464 | + sbi->virt_start_addr = (unsigned long)addr; |
1465 | + } |
1466 | +} |
1467 | + |
1468 | +void axfs_unmap_physmem(struct super_block *sb) |
1469 | +{ |
1470 | + struct axfs_super *sbi = AXFS_SB(sb); |
1471 | + |
1472 | + if (!sbi) |
1473 | + return; |
1474 | + |
1475 | + if (AXFS_IS_PHYSMEM(sbi) && AXFS_VIRTADDR_IS_VALID(sbi)) { |
1476 | + iounmap((void *)(sbi->virt_start_addr)); |
1477 | + sbi->virt_start_addr = 0; |
1478 | + } |
1479 | +} |
1480 | + |
1481 | +#endif /* CONFIG_UML */ |
1482 | diff -Naur linux-2.6.24/fs/axfs/axfs_profiling.c linux-2.6.24-axfs/fs/axfs/axfs_profiling.c |
1483 | --- linux-2.6.24/fs/axfs/axfs_profiling.c 1970-01-01 01:00:00.000000000 +0100 |
1484 | +++ linux-2.6.24-axfs/fs/axfs/axfs_profiling.c 2008-08-24 19:12:32.000000000 +0200 |
1485 | @@ -0,0 +1,602 @@ |
1486 | +/* |
1487 | + * Advanced XIP File System for Linux - AXFS |
1488 | + * Readonly, compressed, and XIP filesystem for Linux systems big and small |
1489 | + * |
1490 | + * Copyright(c) 2008 Numonyx |
1491 | + * |
1492 | + * This program is free software; you can redistribute it and/or modify it |
1493 | + * under the terms and conditions of the GNU General Public License, |
1494 | + * version 2, as published by the Free Software Foundation. |
1495 | + * |
1496 | + * Authors: |
1497 | + * Eric Anderson |
1498 | + * Jared Hulbert <jaredeh@gmail.com> |
1499 | + * Sujaya Srinivasan |
1500 | + * Justin Treon |
1501 | + * |
1502 | + * More info and current contacts at http://axfs.sourceforge.net |
1503 | + * |
1504 | + * axfs_profiling.c - |
1505 | + * Tracks pages of files that enter the page cache. Outputs through a proc |
1506 | + * file which generates a comma separated data file with path, page offset, |
1507 | + * count of times entered page cache. |
1508 | + */ |
1509 | + |
1510 | +#include <linux/axfs.h> |
1511 | +#ifdef CONFIG_AXFS_PROFILING |
1512 | +#include <linux/module.h> |
1513 | +#include <linux/vmalloc.h> |
1514 | +#include <linux/proc_fs.h> |
1515 | + |
1516 | +#define AXFS_PROC_DIR_NAME "axfs" |
1517 | + |
1518 | +struct axfs_profiling_manager { |
1519 | + struct axfs_profiling_data *profiling_data; |
1520 | + struct axfs_super *sbi; |
1521 | + u32 *dir_structure; |
1522 | + u32 size; |
1523 | +}; |
1524 | + |
1525 | +#define MAX_STRING_LEN 1024 |
1526 | + |
1527 | +/* Handles for our Directory and File */ |
1528 | +static struct proc_dir_entry *axfs_proc_dir; |
1529 | +static u32 proc_name_inc; |
1530 | + |
1531 | +/****************************************************************************** |
1532 | + * |
1533 | + * axfs_init_profile_dir_structure |
1534 | + * |
1535 | + * Description: |
1536 | + * Creates the structures for tracking the page usage data and creates the |
1537 | + * proc file that will be used to get the data. |
1538 | + * |
1539 | + * Parameters: |
1540 | + * (IN) manager - pointer to the profile manager for the filing system |
1541 | + * |
1542 | + * (IN) num_inodes - number of files in the system |
1543 | + * |
1544 | + * Returns: |
1545 | + * 0 |
1546 | + * |
1547 | + *****************************************************************************/ |
1548 | +static int axfs_init_profile_dir_structure(struct axfs_profiling_manager |
1549 | + *manager, u32 num_inodes) |
1550 | +{ |
1551 | + |
1552 | + struct axfs_super *sbi = (struct axfs_super *)manager->sbi; |
1553 | + u32 child_index = 0, i, j; |
1554 | + u32 *dir_structure = manager->dir_structure; |
1555 | + |
1556 | + /* loop through each inode in the image and find all |
1557 | + of the directories and mark their children */ |
1558 | + for (i = 0; i < num_inodes; i++) { |
1559 | + /* determine if the entry is a directory */ |
1560 | + if (!S_ISDIR(AXFS_GET_MODE(sbi, i))) |
1561 | + continue; |
1562 | + |
1563 | + /* get the index number for this directory */ |
1564 | + child_index = AXFS_GET_INODE_ARRAY_INDEX(sbi, i); |
1565 | + |
1566 | + /* get the offset to its children */ |
1567 | + for (j = 0; j < AXFS_GET_INODE_NUM_ENTRIES(sbi, i); j++) { |
1568 | + if (dir_structure[child_index + j] != 0) { |
1569 | + printk(KERN_ERR |
1570 | + "axfs: ERROR inode was already set old " |
1571 | + "%lu new %lu\n", (unsigned long) |
1572 | + dir_structure[child_index + j], |
1573 | + (unsigned long)i); |
1574 | + } |
1575 | + dir_structure[child_index + j] = i; |
1576 | + } |
1577 | + } |
1578 | + |
1579 | + return 0; |
1580 | +} |
1581 | + |
1582 | +/****************************************************************************** |
1583 | + * |
1584 | + * axfs_get_directory_path |
1585 | + * |
1586 | + * Description: |
1587 | + * Determines the directory path of every file for printing the spreadsheet. |
1588 | + * |
1589 | + * Parameters: |
1590 | + * (IN) manager - Pointer to axfs profile manager |
1591 | + * |
1592 | + * (OUT) buffer - Pointer to the printable directory path for each file |
1593 | + * |
1594 | + * (IN) inode_number - Inode number of file to look up |
1595 | + * |
1596 | + * Returns: |
1597 | + * Size of the path to the file |
1598 | + * |
1599 | + * |
1600 | + **************************************************************************/ |
1601 | +static int axfs_get_directory_path(struct axfs_profiling_manager *manager, |
1602 | + char *buffer, u32 inode_number) |
1603 | +{ |
1604 | + u32 path_depth = 0; |
1605 | + u32 path_size = 0; |
1606 | + u32 string_len = 0; |
1607 | + u32 index = inode_number; |
1608 | + u32 dir_number; |
1609 | + u8 **path_array = NULL; |
1610 | + struct axfs_super *sbi = (struct axfs_super *)manager->sbi; |
1611 | + int i; |
1612 | + |
1613 | + /* determine how deep the directory path is and how big the name |
1614 | + string will be walk back until the root directory index is found |
1615 | + (index 0 is root) */ |
1616 | + while (manager->dir_structure[index] != 0) { |
1617 | + path_depth++; |
1618 | + /* set the index to the index of the parent directory */ |
1619 | + index = manager->dir_structure[index]; |
1620 | + } |
1621 | + |
1622 | + if (path_depth != 0) { |
1623 | + /* create an array that will hold a pointer for each of the |
1624 | + directories names */ |
1625 | + path_array = vmalloc(path_depth * sizeof(*path_array)); |
1626 | + if (path_array == NULL) { |
1627 | + printk(KERN_DEBUG |
1628 | + "axfs: directory_path vmalloc failed.\n"); |
1629 | + goto out; |
1630 | + } |
1631 | + } |
1632 | + |
1633 | + index = manager->dir_structure[inode_number]; |
1634 | + for (i = path_depth; i > 0; i--) { |
1635 | + /* get the array_index for the directory corresponding to |
1636 | + index */ |
1637 | + dir_number = AXFS_GET_INODE_ARRAY_INDEX(sbi, index); |
1638 | + |
1639 | + /* store a pointer to the name in the array */ |
1640 | + path_array[(i - 1)] = (u8 *) AXFS_GET_INODE_NAME(sbi, index); |
1641 | + |
1642 | + index = manager->dir_structure[index]; |
1643 | + } |
1644 | + |
1645 | + /* now print out the directory structure from the begining */ |
1646 | + string_len = sprintf(buffer, "./"); |
1647 | + path_size += string_len; |
1648 | + for (i = 0; i < path_depth; i++) { |
1649 | + buffer = buffer + string_len; |
1650 | + string_len = sprintf(buffer, "%s/", (char *)path_array[i]); |
1651 | + path_size += string_len; |
1652 | + } |
1653 | + |
1654 | + if (path_array != NULL) |
1655 | + vfree(path_array); |
1656 | + |
1657 | +out: |
1658 | + return path_size; |
1659 | + |
1660 | +} |
1661 | + |
1662 | +static ssize_t axfs_procfile_read(char *buffer, |
1663 | + char **buffer_location, |
1664 | + off_t offset, int buffer_length, int *eof, |
1665 | + void *data) |
1666 | +{ |
1667 | + struct axfs_profiling_manager *man; |
1668 | + struct axfs_profiling_data *profile; |
1669 | + struct axfs_super *sbi; |
1670 | + u64 array_index; |
1671 | + u64 loop_size, inode_page_offset, node_offset, inode_number; |
1672 | + u64 print_len = 0; |
1673 | + unsigned long addr; |
1674 | + int len = 0; |
1675 | + int i; |
1676 | + char *buff, *name = NULL; |
1677 | + |
1678 | + man = (struct axfs_profiling_manager *)data; |
1679 | + sbi = man->sbi; |
1680 | + |
1681 | + loop_size = man->size / sizeof(*profile); |
1682 | + |
1683 | + /* If all data has been returned set EOF */ |
1684 | + if (offset >= loop_size) { |
1685 | + *eof = 1; |
1686 | + return 0; |
1687 | + } |
1688 | + |
1689 | + buff = buffer; |
1690 | + /* print as much as the buffer can take */ |
1691 | + for (i = offset; i < loop_size; i++) { |
1692 | + |
1693 | + if ((print_len + MAX_STRING_LEN) > buffer_length) |
1694 | + break; |
1695 | + /* get the first profile data structure */ |
1696 | + profile = &(man->profiling_data[i]); |
1697 | + |
1698 | + if (profile->count == 0) |
1699 | + continue; |
1700 | + |
1701 | + inode_number = profile->inode_number; |
1702 | + |
1703 | + /* file names can be duplicated so we must print out the path */ |
1704 | + len = axfs_get_directory_path(man, buff, inode_number); |
1705 | + |
1706 | + print_len += len; |
1707 | + buff += len; |
1708 | + |
1709 | + /* get a pointer to the inode name */ |
1710 | + array_index = AXFS_GET_INODE_ARRAY_INDEX(sbi, inode_number); |
1711 | + name = (char *)AXFS_GET_INODE_NAME(sbi, inode_number); |
1712 | + |
1713 | + /* need to convert the page number in the node area to |
1714 | + the page number within the file */ |
1715 | + node_offset = i; |
1716 | + /* gives the offset of the node in the node list area |
1717 | + then substract that from the */ |
1718 | + inode_page_offset = node_offset - array_index; |
1719 | + |
1720 | + /* set everything up to print out */ |
1721 | + addr = (unsigned long)(inode_page_offset * PAGE_SIZE); |
1722 | + len = sprintf(buff, "%s,%lu,%lu\n", name, addr, profile->count); |
1723 | + |
1724 | + print_len += len; |
1725 | + buff += len; |
1726 | + } |
1727 | + |
1728 | + /* return the number of items printed. |
1729 | + This will be added to offset and passed back to us */ |
1730 | + *buffer_location = (char *)(i - offset); |
1731 | + |
1732 | + return print_len; |
1733 | +} |
1734 | + |
1735 | +static ssize_t axfs_procfile_write(struct file *file, |
1736 | + const char *buffer, unsigned long count, |
1737 | + void *data) |
1738 | +{ |
1739 | + struct axfs_profiling_manager *man_ptr = |
1740 | + (struct axfs_profiling_manager *)data; |
1741 | + |
1742 | + if ((count >= 2) && (0 == memcmp(buffer, "on", 2))) { |
1743 | + man_ptr->sbi->profiling_on = TRUE; |
1744 | + } else if ((count >= 3) && (0 == memcmp(buffer, "off", 3))) { |
1745 | + man_ptr->sbi->profiling_on = FALSE; |
1746 | + } else if ((count >= 5) && (0 == memcmp(buffer, "clear", 5))) { |
1747 | + memset(man_ptr->profiling_data, 0, man_ptr->size); |
1748 | + } else { |
1749 | + printk(KERN_INFO |
1750 | + "axfs: Unknown command. Supported options are:\n"); |
1751 | + printk(KERN_INFO "\t\"on\"\tTurn on profiling\n"); |
1752 | + printk(KERN_INFO "\t\"off\"\tTurn off profiling\n"); |
1753 | + printk(KERN_INFO "\t\"clear\"\tClear profiling buffer\n"); |
1754 | + } |
1755 | + |
1756 | + return count; |
1757 | +} |
1758 | + |
1759 | +static int axfs_create_proc_directory(void) |
1760 | +{ |
1761 | + if (axfs_proc_dir == NULL) { |
1762 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,25) |
1763 | + axfs_proc_dir = proc_mkdir(AXFS_PROC_DIR_NAME, NULL); |
1764 | +#else |
1765 | + axfs_proc_dir = proc_mkdir(AXFS_PROC_DIR_NAME, &proc_root); |
1766 | +#endif |
1767 | + if (!axfs_proc_dir) { |
1768 | + printk(KERN_WARNING |
1769 | + "axfs: Failed to create directory\n"); |
1770 | + return FALSE; |
1771 | + } |
1772 | + } |
1773 | + return TRUE; |
1774 | +} |
1775 | + |
1776 | +static void axfs_delete_proc_directory(void) |
1777 | +{ |
1778 | + /* Determine if there are any directory elements |
1779 | + and remove if all of the proc files are removed. */ |
1780 | + if (axfs_proc_dir != NULL) { |
1781 | + if (axfs_proc_dir->subdir == NULL) { |
1782 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,25) |
1783 | + remove_proc_entry(AXFS_PROC_DIR_NAME, NULL); |
1784 | +#else |
1785 | + remove_proc_entry(AXFS_PROC_DIR_NAME, &proc_root); |
1786 | +#endif |
1787 | + axfs_proc_dir = NULL; |
1788 | + } |
1789 | + } |
1790 | +} |
1791 | + |
1792 | +/****************************************************************************** |
1793 | + * |
1794 | + * axfs_delete_proc_file |
1795 | + * |
1796 | + * Description: |
1797 | + * Will search through the proc directory for the correct proc file, |
1798 | + * then delete it |
1799 | + * |
1800 | + * Parameters: |
1801 | + * (IN) sbi- axfs superblock pointer to determine which proc file to remove |
1802 | + * |
1803 | + * Returns: |
1804 | + * The profiling manager pointer for the proc file. |
1805 | + * |
1806 | + *****************************************************************************/ |
1807 | +static struct axfs_profiling_manager *axfs_delete_proc_file(struct axfs_super |
1808 | + *sbi) |
1809 | +{ |
1810 | + struct proc_dir_entry *current_proc_file; |
1811 | + struct axfs_profiling_manager *manager; |
1812 | + void *rv = NULL; |
1813 | + |
1814 | + if (!axfs_proc_dir) |
1815 | + return NULL; |
1816 | + |
1817 | + /* Walk through the proc file entries to find the matching sbi */ |
1818 | + current_proc_file = axfs_proc_dir->subdir; |
1819 | + |
1820 | + while (current_proc_file != NULL) { |
1821 | + manager = current_proc_file->data; |
1822 | + if (manager == NULL) { |
1823 | + printk(KERN_WARNING |
1824 | + "axfs: Error removing proc file private " |
1825 | + "data was NULL.\n"); |
1826 | + rv = NULL; |
1827 | + break; |
1828 | + } |
1829 | + if (manager->sbi == sbi) { |
1830 | + /* we found the match */ |
1831 | + remove_proc_entry(current_proc_file->name, |
1832 | + axfs_proc_dir); |
1833 | + rv = (void *)manager; |
1834 | + break; |
1835 | + } |
1836 | + current_proc_file = axfs_proc_dir->next; |
1837 | + } |
1838 | + return (struct axfs_profiling_manager *)rv; |
1839 | +} |
1840 | + |
1841 | +/****************************************************************************** |
1842 | + * |
1843 | + * axfs_register_profiling_proc |
1844 | + * |
1845 | + * Description: |
1846 | + * Will register the instance of the proc file for a given volume. |
1847 | + * |
1848 | + * Parameters: |
1849 | + * (IN) manager - Pointer to the profiling manager for the axfs volume |
1850 | + * |
1851 | + * Returns: |
1852 | + * 0 or error number |
1853 | + * |
1854 | + *****************************************************************************/ |
1855 | +static int axfs_register_profiling_proc(struct axfs_profiling_manager *manager) |
1856 | +{ |
1857 | + int rv = 0; |
1858 | + struct proc_dir_entry *proc_file; |
1859 | + char file_name[20]; |
1860 | + |
1861 | + if (!axfs_create_proc_directory()) { |
1862 | + rv = -ENOMEM; |
1863 | + goto out; |
1864 | + } |
1865 | + |
1866 | + sprintf(file_name, "volume%d", proc_name_inc); |
1867 | + proc_file = create_proc_entry(file_name, (mode_t) 0644, axfs_proc_dir); |
1868 | + if (proc_file == NULL) { |
1869 | + remove_proc_entry(file_name, axfs_proc_dir); |
1870 | + axfs_delete_proc_directory(); |
1871 | + rv = -ENOMEM; |
1872 | + goto out; |
1873 | + } |
1874 | + |
1875 | + proc_name_inc++; |
1876 | + proc_file->read_proc = axfs_procfile_read; |
1877 | + proc_file->write_proc = axfs_procfile_write; |
1878 | + proc_file->owner = THIS_MODULE; |
1879 | + proc_file->mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; |
1880 | + proc_file->uid = 0; |
1881 | + proc_file->gid = 0; |
1882 | + proc_file->data = manager; |
1883 | + |
1884 | + printk(KERN_DEBUG "axfs: Proc entry created\n"); |
1885 | + |
1886 | +out: |
1887 | + return rv; |
1888 | +} |
1889 | + |
1890 | +/****************************************************************************** |
1891 | + * |
1892 | + * axfs_unregister_profiling_proc |
1893 | + * |
1894 | + * Description: |
1895 | + * Will unregister the instance of the proc file for the volume that was |
1896 | + * mounted. If this is the last volume mounted then the proc directory |
1897 | + * will also be removed. |
1898 | + * |
1899 | + * Parameters: |
1900 | + * (IN) sbi- axfs superblock pointer to determine which proc file to remove |
1901 | + * |
1902 | + * Returns: |
1903 | + * The profiling manager pointer for the proc file. |
1904 | + * |
1905 | + *****************************************************************************/ |
1906 | +static struct axfs_profiling_manager *axfs_unregister_profiling_proc(struct |
1907 | + axfs_super |
1908 | + *sbi) |
1909 | +{ |
1910 | + struct axfs_profiling_manager *manager; |
1911 | + manager = axfs_delete_proc_file(sbi); |
1912 | + axfs_delete_proc_directory(); |
1913 | + return manager; |
1914 | +} |
1915 | + |
1916 | +/****************************************************************************** |
1917 | + * |
1918 | + * axfs_init_profiling |
1919 | + * |
1920 | + * Description: |
1921 | + * Creates the structures for tracking the page usage data and creates the |
1922 | + * proc file that will be used to get the data. |
1923 | + * |
1924 | + * Parameters: |
1925 | + * (IN) sbi- axfs superblock pointer |
1926 | + * |
1927 | + * Returns: |
1928 | + * TRUE or FALSE |
1929 | + * |
1930 | + *****************************************************************************/ |
1931 | +int axfs_init_profiling(struct axfs_super *sbi) |
1932 | +{ |
1933 | + |
1934 | + u32 num_nodes, num_inodes; |
1935 | + struct axfs_profiling_manager *manager = NULL; |
1936 | + struct axfs_profiling_data *profile_data = NULL; |
1937 | + int err = -ENOMEM; |
1938 | + |
1939 | + /* determine the max number of pages in the FS */ |
1940 | + num_nodes = sbi->blocks; |
1941 | + if (!num_nodes) |
1942 | + return 0; |
1943 | + |
1944 | + manager = vmalloc(sizeof(*manager)); |
1945 | + if (!manager) |
1946 | + goto out; |
1947 | + |
1948 | + profile_data = vmalloc(num_nodes * sizeof(*profile_data)); |
1949 | + if (!profile_data) |
1950 | + goto out; |
1951 | + |
1952 | + memset(profile_data, 0, num_nodes * sizeof(*profile_data)); |
1953 | + |
1954 | + /* determine the max number of inodes in the FS */ |
1955 | + num_inodes = sbi->files; |
1956 | + |
1957 | + manager->dir_structure = vmalloc(num_inodes * sizeof(u32 *)); |
1958 | + if (!manager->dir_structure) |
1959 | + goto out; |
1960 | + |
1961 | + memset(manager->dir_structure, 0, (num_inodes * sizeof(u32 *))); |
1962 | + |
1963 | + manager->profiling_data = profile_data; |
1964 | + manager->size = num_nodes * sizeof(*profile_data); |
1965 | + manager->sbi = sbi; |
1966 | + sbi->profiling_on = TRUE; /* Turn on profiling by default */ |
1967 | + sbi->profile_data_ptr = profile_data; |
1968 | + |
1969 | + err = axfs_init_profile_dir_structure(manager, num_inodes); |
1970 | + if (err) |
1971 | + goto out; |
1972 | + |
1973 | + err = axfs_register_profiling_proc(manager); |
1974 | + if (err) |
1975 | + goto out; |
1976 | + |
1977 | + return 0; |
1978 | + |
1979 | +out: |
1980 | + if (manager->dir_structure) |
1981 | + vfree(manager->dir_structure); |
1982 | + if (profile_data) |
1983 | + vfree(profile_data); |
1984 | + if (manager) |
1985 | + vfree(manager); |
1986 | + return err; |
1987 | +} |
1988 | + |
1989 | +/****************************************************************************** |
1990 | + * |
1991 | + * axfs_shutdown_profiling |
1992 | + * |
1993 | + * Description: |
1994 | + * Remove the proc file for this volume and release the memory in the |
1995 | + * profiling manager |
1996 | + * |
1997 | + * Parameters: |
1998 | + * (IN) sbi- axfs superblock pointer |
1999 | + * |
2000 | + * Returns: |
2001 | + * TRUE or FALSE |
2002 | + * |
2003 | + *****************************************************************************/ |
2004 | +int axfs_shutdown_profiling(struct axfs_super *sbi) |
2005 | +{ |
2006 | + struct axfs_profiling_manager *manager; |
2007 | + /* remove the proc file for this volume and release the memory in the |
2008 | + profiling manager */ |
2009 | + |
2010 | + if (!sbi) |
2011 | + return TRUE; |
2012 | + |
2013 | + if (!sbi->profile_data_ptr) |
2014 | + return TRUE; |
2015 | + |
2016 | + manager = axfs_unregister_profiling_proc(sbi); |
2017 | + |
2018 | + if (manager == NULL) |
2019 | + return FALSE; |
2020 | + |
2021 | + if (manager->dir_structure) |
2022 | + vfree(manager->dir_structure); |
2023 | + if (manager->profiling_data) |
2024 | + vfree(manager->profiling_data); |
2025 | + if (manager) |
2026 | + vfree(manager); |
2027 | + return TRUE; |
2028 | +} |
2029 | + |
2030 | +/****************************************************************************** |
2031 | + * |
2032 | + * axfs_profiling_add |
2033 | + * |
2034 | + * Description: |
2035 | + * Log when a node is paged into memory by incrementing the count in the |
2036 | + * array profile data structure. |
2037 | + * |
2038 | + * Parameters: |
2039 | + * (IN) sbi- axfs superblock pointer |
2040 | + * |
2041 | + * (IN) array_index - The offset into the nodes table of file (node number) |
2042 | + * |
2043 | + * (IN) axfs_inode_number - Inode of the node to determine file name later |
2044 | + * |
2045 | + * Returns: |
2046 | + * none |
2047 | + * |
2048 | + *****************************************************************************/ |
2049 | +void axfs_profiling_add(struct axfs_super *sbi, unsigned long array_index, |
2050 | + unsigned int axfs_inode_number) |
2051 | +{ |
2052 | + unsigned long addr; |
2053 | + struct axfs_profiling_data *profile_data; |
2054 | + |
2055 | + if (sbi->profiling_on != TRUE) |
2056 | + return; |
2057 | + |
2058 | + addr = (unsigned long)sbi->profile_data_ptr; |
2059 | + addr += array_index * sizeof(*profile_data); |
2060 | + |
2061 | + profile_data = (struct axfs_profiling_data *)addr; |
2062 | + |
2063 | + /* Record the inode number to determine the file name later. */ |
2064 | + profile_data->inode_number = axfs_inode_number; |
2065 | + |
2066 | + /* Increment the number of times the node has been paged in */ |
2067 | + profile_data->count++; |
2068 | +} |
2069 | + |
2070 | +#else |
2071 | + |
2072 | +int axfs_init_profiling(struct axfs_super *sbi) |
2073 | +{ |
2074 | + return 0; |
2075 | +} |
2076 | + |
2077 | +int axfs_shutdown_profiling(struct axfs_super *sbi) |
2078 | +{ |
2079 | + return 0; |
2080 | +} |
2081 | + |
2082 | +void axfs_profiling_add(struct axfs_super *sbi, unsigned long array_index, |
2083 | + unsigned int axfs_inode_number) |
2084 | +{ |
2085 | +} |
2086 | + |
2087 | +#endif /* CONFIG_AXFS_PROFILING */ |
2088 | diff -Naur linux-2.6.24/fs/axfs/axfs_super.c linux-2.6.24-axfs/fs/axfs/axfs_super.c |
2089 | --- linux-2.6.24/fs/axfs/axfs_super.c 1970-01-01 01:00:00.000000000 +0100 |
2090 | +++ linux-2.6.24-axfs/fs/axfs/axfs_super.c 2008-08-24 19:12:32.000000000 +0200 |
2091 | @@ -0,0 +1,928 @@ |
2092 | +/* |
2093 | + * Advanced XIP File System for Linux - AXFS |
2094 | + * Readonly, compressed, and XIP filesystem for Linux systems big and small |
2095 | + * |
2096 | + * Copyright(c) 2008 Numonyx |
2097 | + * |
2098 | + * This program is free software; you can redistribute it and/or modify it |
2099 | + * under the terms and conditions of the GNU General Public License, |
2100 | + * version 2, as published by the Free Software Foundation. |
2101 | + * |
2102 | + * Authors: |
2103 | + * Eric Anderson |
2104 | + * Jared Hulbert <jaredeh@gmail.com> |
2105 | + * Sujaya Srinivasan |
2106 | + * Justin Treon |
2107 | + * |
2108 | + * More info and current contacts at http://axfs.sourceforge.net |
2109 | + * |
2110 | + * axfs_super.c - |
2111 | + * Contains the core code used to mount the fs. |
2112 | + * |
2113 | + */ |
2114 | + |
2115 | +#include <linux/axfs.h> |
2116 | +#include <linux/fs.h> |
2117 | +#include <linux/vmalloc.h> |
2118 | +#include <linux/parser.h> |
2119 | +#include <linux/statfs.h> |
2120 | +#include <linux/module.h> |
2121 | +#include <linux/mount.h> |
2122 | +#include <linux/mtd/mtd.h> |
2123 | + |
2124 | +/******************** Function Declarations ****************************/ |
2125 | +static struct super_operations axfs_sops; |
2126 | +static struct axfs_super *axfs_get_sbi(void); |
2127 | +static void axfs_put_sbi(struct axfs_super *); |
2128 | +/***************** functions in other axfs files ***************************/ |
2129 | +int axfs_get_sb_bdev(struct file_system_type *, int, const char *, |
2130 | + struct axfs_super *, struct vfsmount *, int *); |
2131 | +void axfs_kill_block_super(struct super_block *); |
2132 | +int axfs_copy_block(struct super_block *, void *, u64, u64); |
2133 | +int axfs_is_dev_bdev(char *); |
2134 | +#ifndef NO_PHYSMEM |
2135 | +void axfs_map_physmem(struct axfs_super *, unsigned long); |
2136 | +void axfs_unmap_physmem(struct super_block *); |
2137 | +#endif |
2138 | +int axfs_map_mtd(struct super_block *); |
2139 | +void axfs_unmap_mtd(struct super_block *); |
2140 | +int axfs_copy_mtd(struct super_block *, void *, u64, u64); |
2141 | +int axfs_get_sb_mtd(struct file_system_type *, int, const char *, |
2142 | + struct axfs_super *, struct vfsmount *, int *); |
2143 | +int axfs_is_dev_mtd(char *, int *); |
2144 | +void axfs_kill_mtd_super(struct super_block *); |
2145 | +struct inode *axfs_create_vfs_inode(struct super_block *, int); |
2146 | +int axfs_get_uml_address(char *, unsigned long *, unsigned long *); |
2147 | +int axfs_init_profiling(struct axfs_super *); |
2148 | +int axfs_shutdown_profiling(struct axfs_super *); |
2149 | +void axfs_profiling_add(struct axfs_super *, unsigned long, unsigned int); |
2150 | +struct inode *axfs_create_vfs_inode(struct super_block *, int); |
2151 | +/******************************************************************************/ |
2152 | + |
2153 | +static void axfs_free_region(struct axfs_super *sbi, |
2154 | + struct axfs_region_desc *region) |
2155 | +{ |
2156 | + if (!region) |
2157 | + return; |
2158 | + |
2159 | + if (AXFS_IS_REGION_XIP(sbi, region)) |
2160 | + return; |
2161 | + |
2162 | + if (region->virt_addr) |
2163 | + vfree(region->virt_addr); |
2164 | +} |
2165 | + |
2166 | +static void axfs_put_sbi(struct axfs_super *sbi) |
2167 | +{ |
2168 | + if (!sbi) |
2169 | + return; |
2170 | + |
2171 | + axfs_shutdown_profiling(sbi); |
2172 | + |
2173 | + axfs_free_region(sbi, &sbi->strings); |
2174 | + axfs_free_region(sbi, &sbi->xip); |
2175 | + axfs_free_region(sbi, &sbi->compressed); |
2176 | + axfs_free_region(sbi, &sbi->byte_aligned); |
2177 | + axfs_free_region(sbi, &sbi->node_type); |
2178 | + axfs_free_region(sbi, &sbi->node_index); |
2179 | + axfs_free_region(sbi, &sbi->cnode_offset); |
2180 | + axfs_free_region(sbi, &sbi->cnode_index); |
2181 | + axfs_free_region(sbi, &sbi->banode_offset); |
2182 | + axfs_free_region(sbi, &sbi->cblock_offset); |
2183 | + axfs_free_region(sbi, &sbi->inode_file_size); |
2184 | + axfs_free_region(sbi, &sbi->inode_name_offset); |
2185 | + axfs_free_region(sbi, &sbi->inode_num_entries); |
2186 | + axfs_free_region(sbi, &sbi->inode_mode_index); |
2187 | + axfs_free_region(sbi, &sbi->inode_array_index); |
2188 | + axfs_free_region(sbi, &sbi->modes); |
2189 | + axfs_free_region(sbi, &sbi->uids); |
2190 | + axfs_free_region(sbi, &sbi->gids); |
2191 | + |
2192 | + if (sbi->second_dev) |
2193 | + kfree(sbi->second_dev); |
2194 | + |
2195 | + if (sbi->cblock_buffer[0]) |
2196 | + vfree(sbi->cblock_buffer[0]); |
2197 | + if (sbi->cblock_buffer[1]) |
2198 | + vfree(sbi->cblock_buffer[1]); |
2199 | + |
2200 | + kfree(sbi); |
2201 | +} |
2202 | + |
2203 | +static void axfs_put_super(struct super_block *sb) |
2204 | +{ |
2205 | + axfs_unmap_mtd(sb); |
2206 | +#ifndef NO_PHYSMEM |
2207 | + axfs_unmap_physmem(sb); |
2208 | +#endif |
2209 | + axfs_put_sbi(AXFS_SB(sb)); |
2210 | + sb->s_fs_info = NULL; |
2211 | +} |
2212 | + |
2213 | +static int axfs_copy_mem(struct super_block *sb, void *buf, u64 fsoffset, |
2214 | + u64 len) |
2215 | +{ |
2216 | + struct axfs_super *sbi = AXFS_SB(sb); |
2217 | + unsigned long addr; |
2218 | + |
2219 | + addr = sbi->virt_start_addr + (unsigned long)fsoffset; |
2220 | + memcpy(buf, (void *)addr, (size_t) len); |
2221 | + return 0; |
2222 | +} |
2223 | + |
2224 | +static int axfs_copy_metadata(struct super_block *sb, void *buf, u64 fsoffset, |
2225 | + u64 len) |
2226 | +{ |
2227 | + struct axfs_super *sbi = AXFS_SB(sb); |
2228 | + u64 end = fsoffset + len; |
2229 | + u64 a = sbi->mmap_size - fsoffset; |
2230 | + u64 b = end - sbi->mmap_size; |
2231 | + void *bb = (void *)((unsigned long)buf + (unsigned long)a); |
2232 | + int err; |
2233 | + |
2234 | + /* Catches case where sbi is not yet fully initialized. */ |
2235 | + if ((sbi->magic == 0) && (sbi->virt_start_addr != 0)) |
2236 | + return axfs_copy_mem(sb, buf, fsoffset, len); |
2237 | + |
2238 | + if (fsoffset < sbi->mmap_size) { |
2239 | + if (end > sbi->mmap_size) { |
2240 | + err = axfs_copy_metadata(sb, buf, fsoffset, a); |
2241 | + if (err) |
2242 | + return err; |
2243 | + err = axfs_copy_metadata(sb, bb, sbi->mmap_size, b); |
2244 | + } else { |
2245 | + if (AXFS_IS_OFFSET_MMAPABLE(sbi, fsoffset)) { |
2246 | + err = axfs_copy_mem(sb, buf, fsoffset, len); |
2247 | + } else if (AXFS_HAS_MTD(sb)) { |
2248 | + err = axfs_copy_mtd(sb, buf, fsoffset, len); |
2249 | + } else if (AXFS_HAS_BDEV(sb)) { |
2250 | + err = axfs_copy_block(sb, buf, fsoffset, len); |
2251 | + } else { |
2252 | + err = -EINVAL; |
2253 | + } |
2254 | + } |
2255 | + } else { |
2256 | + if (AXFS_NODEV(sb)) { |
2257 | + err = axfs_copy_mem(sb, buf, fsoffset, len); |
2258 | + } else if (AXFS_HAS_BDEV(sb)) { |
2259 | + err = axfs_copy_block(sb, buf, fsoffset, len); |
2260 | + } else if (AXFS_HAS_MTD(sb)) { |
2261 | + err = axfs_copy_mtd(sb, buf, fsoffset, len); |
2262 | + } else { |
2263 | + err = -EINVAL; |
2264 | + } |
2265 | + } |
2266 | + return err; |
2267 | +} |
2268 | + |
2269 | +static int axfs_fill_region_data(struct super_block *sb, |
2270 | + struct axfs_region_desc *region, int force) |
2271 | +{ |
2272 | + struct axfs_super *sbi = AXFS_SB(sb); |
2273 | + unsigned long addr; |
2274 | + void *buff = NULL; |
2275 | + void *vaddr; |
2276 | + int err = -ENOMEM; |
2277 | + u64 size = region->size; |
2278 | + u64 fsoffset = region->fsoffset; |
2279 | + u64 end = fsoffset + size; |
2280 | + u64 c_size = region->compressed_size; |
2281 | + |
2282 | + if (size == 0) |
2283 | + return 0; |
2284 | + |
2285 | + if (AXFS_IS_REGION_INCORE(region)) |
2286 | + goto incore; |
2287 | + |
2288 | + if (AXFS_IS_REGION_COMPRESSED(region)) |
2289 | + goto incore; |
2290 | + |
2291 | + if (AXFS_IS_REGION_XIP(sbi, region)) { |
2292 | + if ((end > sbi->mmap_size) && (force)) |
2293 | + goto incore; |
2294 | + addr = sbi->virt_start_addr; |
2295 | + addr += (unsigned long)fsoffset; |
2296 | + region->virt_addr = (void *)addr; |
2297 | + return 0; |
2298 | + } |
2299 | + |
2300 | + if (force) |
2301 | + goto incore; |
2302 | + |
2303 | + region->virt_addr = NULL; |
2304 | + return 0; |
2305 | + |
2306 | +incore: |
2307 | + region->virt_addr = vmalloc(size); |
2308 | + if (!region->virt_addr) |
2309 | + goto out; |
2310 | + vaddr = region->virt_addr; |
2311 | + |
2312 | + if (AXFS_IS_REGION_COMPRESSED(region)) { |
2313 | + buff = vmalloc(c_size); |
2314 | + if (!buff) |
2315 | + goto out; |
2316 | + axfs_copy_metadata(sb, buff, fsoffset, c_size); |
2317 | + err = axfs_uncompress_block(vaddr, size, buff, c_size); |
2318 | + if (!err) |
2319 | + goto out; |
2320 | + vfree(buff); |
2321 | + } else { |
2322 | + axfs_copy_metadata(sb, vaddr, fsoffset, size); |
2323 | + } |
2324 | + |
2325 | + return 0; |
2326 | + |
2327 | +out: |
2328 | + if (buff) |
2329 | + vfree(buff); |
2330 | + if (region->virt_addr) |
2331 | + vfree(region->virt_addr); |
2332 | + return err; |
2333 | +} |
2334 | + |
2335 | +static int axfs_fill_region_data_ptrs(struct super_block *sb) |
2336 | +{ |
2337 | + int err; |
2338 | + struct axfs_super *sbi = AXFS_SB(sb); |
2339 | + |
2340 | + err = axfs_fill_region_data(sb, &sbi->strings, TRUE); |
2341 | + if (err) |
2342 | + goto out; |
2343 | + |
2344 | + err = axfs_fill_region_data(sb, &sbi->xip, TRUE); |
2345 | + if (err) |
2346 | + goto out; |
2347 | + |
2348 | + err = axfs_fill_region_data(sb, &sbi->compressed, FALSE); |
2349 | + if (err) |
2350 | + goto out; |
2351 | + |
2352 | + err = axfs_fill_region_data(sb, &sbi->byte_aligned, FALSE); |
2353 | + if (err) |
2354 | + goto out; |
2355 | + |
2356 | + err = axfs_fill_region_data(sb, &sbi->node_type, TRUE); |
2357 | + if (err) |
2358 | + goto out; |
2359 | + err = axfs_fill_region_data(sb, &sbi->node_index, TRUE); |
2360 | + if (err) |
2361 | + goto out; |
2362 | + err = axfs_fill_region_data(sb, &sbi->cnode_offset, TRUE); |
2363 | + if (err) |
2364 | + goto out; |
2365 | + err = axfs_fill_region_data(sb, &sbi->cnode_index, TRUE); |
2366 | + if (err) |
2367 | + goto out; |
2368 | + err = axfs_fill_region_data(sb, &sbi->banode_offset, TRUE); |
2369 | + if (err) |
2370 | + goto out; |
2371 | + err = axfs_fill_region_data(sb, &sbi->cblock_offset, TRUE); |
2372 | + if (err) |
2373 | + goto out; |
2374 | + err = axfs_fill_region_data(sb, &sbi->inode_file_size, TRUE); |
2375 | + if (err) |
2376 | + goto out; |
2377 | + err = axfs_fill_region_data(sb, &sbi->inode_name_offset, TRUE); |
2378 | + if (err) |
2379 | + goto out; |
2380 | + err = axfs_fill_region_data(sb, &sbi->inode_num_entries, TRUE); |
2381 | + if (err) |
2382 | + goto out; |
2383 | + err = axfs_fill_region_data(sb, &sbi->inode_mode_index, TRUE); |
2384 | + if (err) |
2385 | + goto out; |
2386 | + err = axfs_fill_region_data(sb, &sbi->inode_array_index, TRUE); |
2387 | + if (err) |
2388 | + goto out; |
2389 | + err = axfs_fill_region_data(sb, &sbi->modes, TRUE); |
2390 | + if (err) |
2391 | + goto out; |
2392 | + err = axfs_fill_region_data(sb, &sbi->uids, TRUE); |
2393 | + if (err) |
2394 | + goto out; |
2395 | + err = axfs_fill_region_data(sb, &sbi->gids, TRUE); |
2396 | + if (err) |
2397 | + goto out; |
2398 | + |
2399 | +out: |
2400 | + return err; |
2401 | +} |
2402 | + |
2403 | +static int axfs_init_cblock_buffers(struct axfs_super *sbi) |
2404 | +{ |
2405 | + sbi->current_cnode_index = -1; |
2406 | + sbi->cblock_buffer[0] = vmalloc(sbi->cblock_size); |
2407 | + sbi->cblock_buffer[1] = vmalloc(sbi->cblock_size); |
2408 | + if ((!sbi->cblock_buffer[0]) || (!sbi->cblock_buffer[1])) |
2409 | + return -ENOMEM; |
2410 | + |
2411 | + return 0; |
2412 | +} |
2413 | + |
2414 | +static int axfs_fixup_devices(struct super_block *sb) |
2415 | +{ |
2416 | + struct axfs_super *sbi = AXFS_SB(sb); |
2417 | + int err = 0; |
2418 | + |
2419 | +#ifndef NO_PHYSMEM |
2420 | + if (AXFS_IS_PHYSMEM(sbi)) { |
2421 | + axfs_map_physmem(sbi, sbi->mmap_size); |
2422 | + } else if (AXFS_HAS_MTD(sb)) { |
2423 | +#else |
2424 | + if (AXFS_HAS_MTD(sb)) { |
2425 | +#endif |
2426 | + err = axfs_map_mtd(sb); |
2427 | + } else if (AXFS_IS_IOMEM(sbi)) { |
2428 | + sbi->phys_start_addr = 0; |
2429 | + } |
2430 | + return err; |
2431 | +} |
2432 | + |
2433 | +static void axfs_fill_region_desc(struct super_block *sb, |
2434 | + struct axfs_region_desc_onmedia *out, |
2435 | + u64 offset_be, struct axfs_region_desc *in) |
2436 | +{ |
2437 | + u64 offset = be64_to_cpu(offset_be); |
2438 | + |
2439 | + axfs_copy_metadata(sb, (void *)out, offset, sizeof(*out)); |
2440 | + |
2441 | + in->fsoffset = be64_to_cpu(out->fsoffset); |
2442 | + in->size = be64_to_cpu(out->size); |
2443 | + in->compressed_size = be64_to_cpu(out->compressed_size); |
2444 | + in->max_index = be64_to_cpu(out->max_index); |
2445 | + in->table_byte_depth = out->table_byte_depth; |
2446 | + in->incore = out->incore; |
2447 | +} |
2448 | + |
2449 | +static int axfs_fill_region_descriptors(struct super_block *sb, |
2450 | + struct axfs_super_onmedia *sbo) |
2451 | +{ |
2452 | + struct axfs_super *sbi = AXFS_SB(sb); |
2453 | + struct axfs_region_desc_onmedia *out; |
2454 | + |
2455 | + out = kmalloc(sizeof(*out), GFP_KERNEL); |
2456 | + if (!out) |
2457 | + return -ENOMEM; |
2458 | + memset(out, 0, sizeof(*out)); |
2459 | + |
2460 | + axfs_fill_region_desc(sb, out, sbo->strings, &sbi->strings); |
2461 | + axfs_fill_region_desc(sb, out, sbo->xip, &sbi->xip); |
2462 | + axfs_fill_region_desc(sb, out, sbo->compressed, &sbi->compressed); |
2463 | + axfs_fill_region_desc(sb, out, sbo->byte_aligned, &sbi->byte_aligned); |
2464 | + axfs_fill_region_desc(sb, out, sbo->node_type, &sbi->node_type); |
2465 | + axfs_fill_region_desc(sb, out, sbo->node_index, &sbi->node_index); |
2466 | + axfs_fill_region_desc(sb, out, sbo->cnode_offset, &sbi->cnode_offset); |
2467 | + axfs_fill_region_desc(sb, out, sbo->cnode_index, &sbi->cnode_index); |
2468 | + axfs_fill_region_desc(sb, out, sbo->banode_offset, &sbi->banode_offset); |
2469 | + axfs_fill_region_desc(sb, out, sbo->cblock_offset, &sbi->cblock_offset); |
2470 | + axfs_fill_region_desc(sb, out, sbo->inode_file_size, |
2471 | + &sbi->inode_file_size); |
2472 | + axfs_fill_region_desc(sb, out, sbo->inode_name_offset, |
2473 | + &sbi->inode_name_offset); |
2474 | + axfs_fill_region_desc(sb, out, sbo->inode_num_entries, |
2475 | + &sbi->inode_num_entries); |
2476 | + axfs_fill_region_desc(sb, out, sbo->inode_mode_index, |
2477 | + &sbi->inode_mode_index); |
2478 | + axfs_fill_region_desc(sb, out, sbo->inode_array_index, |
2479 | + &sbi->inode_array_index); |
2480 | + axfs_fill_region_desc(sb, out, sbo->modes, &sbi->modes); |
2481 | + axfs_fill_region_desc(sb, out, sbo->uids, &sbi->uids); |
2482 | + axfs_fill_region_desc(sb, out, sbo->gids, &sbi->gids); |
2483 | + |
2484 | + kfree(out); |
2485 | + |
2486 | + return 0; |
2487 | +} |
2488 | + |
2489 | +int axfs_set_compression_type(struct axfs_super *sbi) |
2490 | +{ |
2491 | + if (sbi->compression_type != ZLIB) |
2492 | + return -EINVAL; |
2493 | + |
2494 | + return 0; |
2495 | +} |
2496 | + |
2497 | +static int axfs_get_onmedia_super(struct super_block *sb) |
2498 | +{ |
2499 | + int err; |
2500 | + struct axfs_super *sbi = AXFS_SB(sb); |
2501 | + struct axfs_super_onmedia *sbo; |
2502 | + |
2503 | + sbo = kmalloc(sizeof(*sbo), GFP_KERNEL); |
2504 | + if (!sbo) |
2505 | + return -ENOMEM; |
2506 | + |
2507 | +#ifndef NO_PHYSMEM |
2508 | + axfs_map_physmem(sbi, sizeof(*sbo)); |
2509 | +#endif |
2510 | + axfs_copy_metadata(sb, (void *)sbo, 0, sizeof(*sbo)); |
2511 | + |
2512 | + /* Do sanity checks on the superblock */ |
2513 | + if (be32_to_cpu(sbo->magic) != AXFS_MAGIC) { |
2514 | + printk(KERN_ERR "axfs: wrong magic\n"); |
2515 | + err = -EINVAL; |
2516 | + goto out; |
2517 | + } |
2518 | + |
2519 | + /* verify the signiture is correct */ |
2520 | + if (strncmp(sbo->signature, AXFS_SIGNATURE, sizeof(AXFS_SIGNATURE))) { |
2521 | + printk(KERN_ERR "axfs: wrong axfs signature," |
2522 | + " read %s, expected %s\n", |
2523 | + sbo->signature, AXFS_SIGNATURE); |
2524 | + err = -EINVAL; |
2525 | + goto out; |
2526 | + } |
2527 | + |
2528 | + sbi->magic = be32_to_cpu(sbo->magic); |
2529 | + sbi->version_major = sbo->version_major; |
2530 | + sbi->version_minor = sbo->version_minor; |
2531 | + sbi->version_sub = sbo->version_sub; |
2532 | + sbi->files = be64_to_cpu(sbo->files); |
2533 | + sbi->size = be64_to_cpu(sbo->size); |
2534 | + sbi->blocks = be64_to_cpu(sbo->blocks); |
2535 | + sbi->mmap_size = be64_to_cpu(sbo->mmap_size); |
2536 | + sbi->cblock_size = be32_to_cpu(sbo->cblock_size); |
2537 | + sbi->timestamp.tv_sec = be64_to_cpu(sbo->timestamp); |
2538 | + sbi->timestamp.tv_nsec = 0; |
2539 | + sbi->compression_type = sbo->compression_type; |
2540 | + |
2541 | + err = axfs_set_compression_type(sbi); |
2542 | + if (err) |
2543 | + goto out; |
2544 | + |
2545 | + /* If no block or MTD device, adjust mmapable to cover all image */ |
2546 | + if (AXFS_NODEV(sb)) |
2547 | + sbi->mmap_size = sbi->size; |
2548 | + |
2549 | + err = axfs_fill_region_descriptors(sb, sbo); |
2550 | + if (err) |
2551 | + goto out; |
2552 | + |
2553 | + err = 0; |
2554 | +out: |
2555 | + kfree(sbo); |
2556 | +#ifndef NO_PHYSMEM |
2557 | + axfs_unmap_physmem(sb); |
2558 | +#endif |
2559 | + return err; |
2560 | +} |
2561 | + |
2562 | +/* Verify that the size of the block segment of a split filesystem |
2563 | + is less than or equal to that of the device containing it. |
2564 | + Validation of the size of an mmap segment vs. the device containing |
2565 | + it is handled by the point() function in axfs_map_mtd. |
2566 | +*/ |
2567 | +int axfs_verify_device_sizes(struct super_block *sb) |
2568 | +{ |
2569 | + struct axfs_super *sbi = AXFS_SB(sb); |
2570 | + struct mtd_info *mtd0 = AXFS_MTD(sb); |
2571 | + struct mtd_info *mtd1 = AXFS_MTD1(sb); |
2572 | + int sndsize = sbi->size - sbi->mmap_size; |
2573 | + |
2574 | + /* Whole FS on one device */ |
2575 | + if (mtd0 && !mtd1 && (mtd0->size < sbi->size)) { |
2576 | + printk(KERN_ERR "axfs: ERROR: Filesystem extends beyond end of" |
2577 | + "MTD! Filesystem cannot be safely mounted!\n"); |
2578 | + printk(KERN_ERR "mtd name: %s, mtd size: 0x%x," |
2579 | + " fs size: 0x%llx\n", mtd0->name, mtd0->size, sbi->size); |
2580 | + return -EINVAL; |
2581 | + } |
2582 | + |
2583 | + /* Split filesystem using physaddr */ |
2584 | + if (sndsize && !mtd0 && mtd1 && (mtd1->size < sndsize)) { |
2585 | + printk(KERN_ERR "axfs: ERROR: The specified second_dev device " |
2586 | + "is smaller than the store and download segment!\n"); |
2587 | + printk(KERN_ERR "mtd name: %s, mtd size: 0x%x, " |
2588 | + "snd size: 0x%x\n", mtd1->name, mtd1->size, sndsize); |
2589 | + return -EINVAL; |
2590 | + } |
2591 | + |
2592 | + /* Split filesystem using two devices */ |
2593 | + if (sndsize && mtd0 && mtd1) { |
2594 | + if (mtd0->size < sbi->mmap_size) { |
2595 | + printk(KERN_ERR "axfs: ERROR: Mmap segment extends" |
2596 | + " beyond end of MTD!"); |
2597 | + printk(KERN_ERR "mtd name: %s, mtd size: 0x%x, mmap " |
2598 | + "size: 0x%llx", |
2599 | + mtd0->name, mtd0->size, sbi->mmap_size); |
2600 | + return -EINVAL; |
2601 | + } |
2602 | + if (mtd1->size < sndsize) { |
2603 | + printk(KERN_ERR "axfs: ERROR: The specified second_dev " |
2604 | + "device is smaller than the store and download " |
2605 | + "segment!\n"); |
2606 | + printk(KERN_ERR "mtd name: %s, mtd size: 0x%x, " |
2607 | + "snd size: 0x%x\n", |
2608 | + mtd1->name, mtd1->size, sndsize); |
2609 | + return -EINVAL; |
2610 | + } |
2611 | + } |
2612 | + |
2613 | + return 0; |
2614 | +} |
2615 | + |
2616 | +/* Read the last four bytes of the volume and make sure the AXFS magic is |
2617 | + present. */ |
2618 | +int axfs_verify_eofs_magic(struct super_block *sb) |
2619 | +{ |
2620 | + struct axfs_super *sbi = AXFS_SB(sb); |
2621 | + u32 buf = 0; |
2622 | + int err; |
2623 | + u32 fsoffset = sbi->size - sizeof(u32); |
2624 | + int len = sizeof(u32); |
2625 | + |
2626 | + err = axfs_copy_metadata(sb, &buf, fsoffset, len); |
2627 | + |
2628 | + if (err) |
2629 | + return -EINVAL; |
2630 | + |
2631 | + if (be32_to_cpu(buf) != AXFS_MAGIC) { |
2632 | + printk(KERN_ERR "READ: 0x%x\n", be32_to_cpu(buf)); |
2633 | + printk(KERN_ERR "ERROR: Filesystem is incomplete and cannot be " |
2634 | + "mounted!\n"); |
2635 | + return -EINVAL; |
2636 | + } |
2637 | + |
2638 | + return 0; |
2639 | +} |
2640 | + |
2641 | +static int axfs_do_fill_super(struct super_block *sb) |
2642 | +{ |
2643 | + struct axfs_super *sbi = AXFS_SB(sb); |
2644 | + int err; |
2645 | + |
2646 | + err = axfs_get_onmedia_super(sb); |
2647 | + if (err) |
2648 | + goto out; |
2649 | + |
2650 | + err = axfs_fixup_devices(sb); |
2651 | + if (err) |
2652 | + goto out; |
2653 | + |
2654 | + err = axfs_verify_device_sizes(sb); |
2655 | + if (err) |
2656 | + goto out; |
2657 | + |
2658 | + err = axfs_verify_eofs_magic(sb); |
2659 | + if (err) |
2660 | + goto out; |
2661 | + |
2662 | + err = axfs_fill_region_data_ptrs(sb); |
2663 | + if (err) |
2664 | + goto out; |
2665 | + |
2666 | + /* Check that the root inode is in a sane state */ |
2667 | + if (!S_ISDIR(AXFS_GET_MODE(sbi, 0))) { |
2668 | + printk(KERN_ERR "axfs: root is not a directory\n"); |
2669 | + err = -EINVAL; |
2670 | + goto out; |
2671 | + } |
2672 | + |
2673 | + if (AXFS_GET_INODE_NUM_ENTRIES(sbi, 0) == 0) { |
2674 | + printk(KERN_INFO "axfs: empty filesystem"); |
2675 | + err = -EINVAL; |
2676 | + goto out; |
2677 | + } |
2678 | + |
2679 | + err = axfs_init_cblock_buffers(sbi); |
2680 | + if (err) |
2681 | + goto out; |
2682 | + |
2683 | + init_rwsem(&sbi->lock); |
2684 | + |
2685 | + return 0; |
2686 | + |
2687 | +out: |
2688 | + axfs_put_super(sb); |
2689 | + return err; |
2690 | +} |
2691 | + |
2692 | +int axfs_fill_super(struct super_block *sb, void *data, int silent) |
2693 | +{ |
2694 | + struct axfs_super *sbi_in = (struct axfs_super *)data; |
2695 | + struct axfs_super *sbi; |
2696 | + struct inode *root; |
2697 | + int err; |
2698 | + |
2699 | + sbi = axfs_get_sbi(); |
2700 | + sb->s_fs_info = (void *)sbi; |
2701 | + memcpy(sbi, sbi_in, sizeof(*sbi)); |
2702 | + |
2703 | + /* fully populate the incore superblock structures */ |
2704 | + err = axfs_do_fill_super(sb); |
2705 | + if (err) |
2706 | + goto out; |
2707 | + |
2708 | + sb->s_flags |= MS_RDONLY; |
2709 | + |
2710 | + /* Setup the VFS super block now */ |
2711 | + sb->s_op = &axfs_sops; |
2712 | + root = axfs_create_vfs_inode(sb, 0); |
2713 | + if (!root) { |
2714 | + err = -EINVAL; |
2715 | + goto out; |
2716 | + } |
2717 | + |
2718 | + sb->s_root = d_alloc_root(root); |
2719 | + if (!sb->s_root) { |
2720 | + iput(root); |
2721 | + err = -EINVAL; |
2722 | + goto out; |
2723 | + } |
2724 | + |
2725 | + err = axfs_init_profiling(sbi); |
2726 | + if (err) |
2727 | + goto out; |
2728 | + |
2729 | + return 0; |
2730 | + |
2731 | +out: |
2732 | + axfs_put_super(sb); |
2733 | + return err; |
2734 | +} |
2735 | + |
2736 | +static int axfs_get_sb_address(struct file_system_type *fs_type, int flags, |
2737 | + struct axfs_super *sbi, struct vfsmount *mnt, |
2738 | + int *err) |
2739 | +{ |
2740 | + int mtdnr; |
2741 | + char *sd = sbi->second_dev; |
2742 | + |
2743 | + if (sbi->phys_start_addr == 0) |
2744 | + return FALSE; |
2745 | + |
2746 | + if (sbi->phys_start_addr & (PAGE_SIZE - 1)) { |
2747 | + printk(KERN_ERR |
2748 | + "axfs: address 0x%lx for axfs image isn't aligned" |
2749 | + " to a page boundary\n", sbi->phys_start_addr); |
2750 | + *err = -EINVAL; |
2751 | + return TRUE; |
2752 | + } |
2753 | + |
2754 | + if (axfs_is_dev_mtd(sd, &mtdnr)) { |
2755 | + return axfs_get_sb_mtd(fs_type, flags, sd, sbi, mnt, err); |
2756 | + } else if (axfs_is_dev_bdev(sd)) { |
2757 | + return axfs_get_sb_bdev(fs_type, flags, sd, sbi, mnt, err); |
2758 | + } else { |
2759 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
2760 | + *err = get_sb_nodev(fs_type, flags, sbi, axfs_fill_super, mnt); |
2761 | +#else |
2762 | + mnt->mnt_sb = |
2763 | + get_sb_nodev(fs_type, flags, (void *)sbi, axfs_fill_super); |
2764 | +#endif |
2765 | + } |
2766 | + |
2767 | + return TRUE; |
2768 | +} |
2769 | + |
2770 | +/* helpers for parse_axfs_options */ |
2771 | +enum { |
2772 | + OPTION_ERR, |
2773 | + OPTION_SECOND_DEV, |
2774 | + OPTION_PHYSICAL_ADDRESS_LOWER_X, |
2775 | + OPTION_PHYSICAL_ADDRESS_UPPER_X, |
2776 | + OPTION_IOMEM |
2777 | +}; |
2778 | + |
2779 | +/* helpers for parse_axfs_options */ |
2780 | +static match_table_t tokens = { |
2781 | + {OPTION_SECOND_DEV, "second_dev=%s"}, |
2782 | + {OPTION_PHYSICAL_ADDRESS_LOWER_X, "physaddr=0x%s"}, |
2783 | + {OPTION_PHYSICAL_ADDRESS_UPPER_X, "physaddr=0X%s"}, |
2784 | + {OPTION_IOMEM, "iomem=%s"}, |
2785 | + {OPTION_ERR, NULL} |
2786 | +}; |
2787 | + |
2788 | +static int axfs_check_options(char *options, struct axfs_super *sbi) |
2789 | +{ |
2790 | + unsigned long address = 0; |
2791 | + char *iomem = NULL; |
2792 | + unsigned long length = 0; |
2793 | + char *p; |
2794 | + int err = -EINVAL; |
2795 | + substring_t args[MAX_OPT_ARGS]; |
2796 | + |
2797 | + if (!options) |
2798 | + return 0; |
2799 | + |
2800 | + if (!*options) |
2801 | + return 0; |
2802 | + |
2803 | + while ((p = strsep(&options, ",")) != NULL) { |
2804 | + int token; |
2805 | + if (!*p) |
2806 | + continue; |
2807 | + |
2808 | + token = match_token(p, tokens, args); |
2809 | + switch (token) { |
2810 | + case OPTION_SECOND_DEV: |
2811 | + sbi->second_dev = match_strdup(&args[0]); |
2812 | + if (!(sbi->second_dev)) { |
2813 | + err = -ENOMEM; |
2814 | + goto out; |
2815 | + } |
2816 | + if (!*(sbi->second_dev)) |
2817 | + goto bad_value; |
2818 | + break; |
2819 | + case OPTION_IOMEM: |
2820 | + iomem = match_strdup(&args[0]); |
2821 | + if (!(iomem)) { |
2822 | + err = -ENOMEM; |
2823 | + goto out; |
2824 | + } |
2825 | + if (!*iomem) |
2826 | + goto bad_value; |
2827 | + break; |
2828 | + case OPTION_PHYSICAL_ADDRESS_LOWER_X: |
2829 | + case OPTION_PHYSICAL_ADDRESS_UPPER_X: |
2830 | + if (match_hex(&args[0], (int *)&address)) |
2831 | + goto out; |
2832 | + if (!address) |
2833 | + goto bad_value; |
2834 | + break; |
2835 | + default: |
2836 | + printk(KERN_ERR |
2837 | + "axfs: unrecognized mount option \"%s\" " |
2838 | + "or missing value\n", p); |
2839 | + goto out; |
2840 | + } |
2841 | + } |
2842 | + |
2843 | + if (iomem) { |
2844 | + if (address) |
2845 | + goto out; |
2846 | + err = axfs_get_uml_address(iomem, &address, &length); |
2847 | + kfree(iomem); |
2848 | + sbi->iomem_size = length; |
2849 | + sbi->virt_start_addr = address; |
2850 | + } |
2851 | + |
2852 | + sbi->phys_start_addr = address; |
2853 | + return 0; |
2854 | + |
2855 | +bad_value: |
2856 | + printk(KERN_ERR |
2857 | + "axfs: unrecognized mount option \"%s\" " |
2858 | + "or missing value\n", p); |
2859 | +out: |
2860 | + if (iomem) |
2861 | + kfree(iomem); |
2862 | + return err; |
2863 | +} |
2864 | + |
2865 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17) |
2866 | +int axfs_get_sb(struct file_system_type *fs_type, int flags, |
2867 | + const char *dev_name, void *data, struct vfsmount *mnt) |
2868 | +#else |
2869 | +struct super_block *axfs_get_sb(struct file_system_type *fs_type, int flags, |
2870 | + const char *dev_name, void *data) |
2871 | +#endif |
2872 | +{ |
2873 | + struct axfs_super *sbi; |
2874 | + int err; |
2875 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17) |
2876 | +#else |
2877 | + struct super_block *sb; |
2878 | + struct vfsmount *mnt; |
2879 | + mnt = kmalloc(sizeof(*mnt), GFP_KERNEL); |
2880 | + memset(mnt, 0, sizeof(*mnt)); |
2881 | +#endif |
2882 | + |
2883 | + sbi = axfs_get_sbi(); |
2884 | + if (IS_ERR(sbi)) |
2885 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17) |
2886 | + return PTR_ERR(sbi); |
2887 | +#else |
2888 | + return (struct super_block *)sbi; |
2889 | +#endif |
2890 | + |
2891 | + err = axfs_check_options((char *)data, sbi); |
2892 | + if (err) |
2893 | + goto out; |
2894 | + |
2895 | + /* First we check if we are mounting directly to memory */ |
2896 | + if (axfs_get_sb_address(fs_type, flags, sbi, mnt, &err)) |
2897 | + goto out; |
2898 | + |
2899 | + /* Next we assume there's a MTD device */ |
2900 | + if (axfs_get_sb_mtd(fs_type, flags, dev_name, sbi, mnt, &err)) |
2901 | + goto out; |
2902 | + |
2903 | + /* Now we assume it's a block device */ |
2904 | + if (sbi->second_dev) { |
2905 | + printk(KERN_ERR |
2906 | + "axfs: can't specify secondary block device %s because" |
2907 | + " %s is assumed to be a block device\n", sbi->second_dev, |
2908 | + dev_name); |
2909 | + err = -EINVAL; |
2910 | + goto out; |
2911 | + } |
2912 | + |
2913 | + if (axfs_get_sb_bdev(fs_type, flags, dev_name, sbi, mnt, &err)) |
2914 | + goto out; |
2915 | + |
2916 | + err = -EINVAL; |
2917 | + |
2918 | +out: |
2919 | + axfs_put_sbi(sbi); |
2920 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17) |
2921 | + return err; |
2922 | +#else |
2923 | + if (err) |
2924 | + return ERR_PTR(err); |
2925 | + |
2926 | + sb = mnt->mnt_sb; |
2927 | + kfree(mnt); |
2928 | + return sb; |
2929 | +#endif |
2930 | +} |
2931 | + |
2932 | +static struct axfs_super *axfs_get_sbi(void) |
2933 | +{ |
2934 | + struct axfs_super *sbi; |
2935 | + |
2936 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
2937 | + sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
2938 | +#else |
2939 | + sbi = kmalloc(sizeof(*sbi), GFP_KERNEL); |
2940 | + memset(sbi, 0, sizeof(*sbi)); |
2941 | +#endif |
2942 | + if (sbi) |
2943 | + return sbi; |
2944 | + |
2945 | + axfs_put_sbi(sbi); |
2946 | + return ERR_PTR(-ENOMEM); |
2947 | +} |
2948 | + |
2949 | +static void axfs_kill_super(struct super_block *sb) |
2950 | +{ |
2951 | + if (AXFS_NODEV(sb)) |
2952 | + return kill_anon_super(sb); |
2953 | + |
2954 | + if (AXFS_HAS_MTD(sb)) |
2955 | + axfs_kill_mtd_super(sb); |
2956 | + |
2957 | + if (AXFS_HAS_BDEV(sb)) |
2958 | + axfs_kill_block_super(sb); |
2959 | +} |
2960 | + |
2961 | +static int axfs_remount(struct super_block *sb, int *flags, char *data) |
2962 | +{ |
2963 | + *flags |= MS_RDONLY; |
2964 | + return 0; |
2965 | +} |
2966 | + |
2967 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17) |
2968 | +static int axfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
2969 | +#elif LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0) |
2970 | +static int axfs_statfs(struct super_block *sb, struct kstatfs *buf) |
2971 | +#else |
2972 | +static int axfs_statfs(struct super_block *sb, struct statfs *buf) |
2973 | +#endif |
2974 | +{ |
2975 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17) |
2976 | + struct axfs_super *sbi = AXFS_SB(dentry->d_sb); |
2977 | +#else |
2978 | + struct axfs_super *sbi = AXFS_SB(sb); |
2979 | +#endif |
2980 | + |
2981 | + buf->f_type = AXFS_MAGIC; |
2982 | + buf->f_bsize = AXFS_PAGE_SIZE; |
2983 | + buf->f_blocks = sbi->blocks; |
2984 | + buf->f_bfree = 0; |
2985 | + buf->f_bavail = 0; |
2986 | + buf->f_files = sbi->files; |
2987 | + buf->f_ffree = 0; |
2988 | + buf->f_namelen = AXFS_MAXPATHLEN; |
2989 | + return 0; |
2990 | +} |
2991 | + |
2992 | +static struct super_operations axfs_sops = { |
2993 | + .put_super = axfs_put_super, |
2994 | + .remount_fs = axfs_remount, |
2995 | + .statfs = axfs_statfs, |
2996 | +}; |
2997 | + |
2998 | +static struct file_system_type axfs_fs_type = { |
2999 | + .owner = THIS_MODULE, |
3000 | + .name = "axfs", |
3001 | + .get_sb = axfs_get_sb, |
3002 | + .kill_sb = axfs_kill_super, |
3003 | +}; |
3004 | + |
3005 | +static int __init init_axfs_fs(void) |
3006 | +{ |
3007 | + axfs_uncompress_init(); |
3008 | + return register_filesystem(&axfs_fs_type); |
3009 | +} |
3010 | + |
3011 | +static void __exit exit_axfs_fs(void) |
3012 | +{ |
3013 | + axfs_uncompress_exit(); |
3014 | + unregister_filesystem(&axfs_fs_type); |
3015 | +} |
3016 | + |
3017 | +module_init(init_axfs_fs); |
3018 | +module_exit(exit_axfs_fs); |
3019 | +MODULE_LICENSE("GPL"); |
3020 | diff -Naur linux-2.6.24/fs/axfs/axfs_uml.c linux-2.6.24-axfs/fs/axfs/axfs_uml.c |
3021 | --- linux-2.6.24/fs/axfs/axfs_uml.c 1970-01-01 01:00:00.000000000 +0100 |
3022 | +++ linux-2.6.24-axfs/fs/axfs/axfs_uml.c 2008-08-24 19:12:32.000000000 +0200 |
3023 | @@ -0,0 +1,47 @@ |
3024 | +/* |
3025 | + * Advanced XIP File System for Linux - AXFS |
3026 | + * Readonly, compressed, and XIP filesystem for Linux systems big and small |
3027 | + * |
3028 | + * Copyright(c) 2008 Numonyx |
3029 | + * |
3030 | + * This program is free software; you can redistribute it and/or modify it |
3031 | + * under the terms and conditions of the GNU General Public License, |
3032 | + * version 2, as published by the Free Software Foundation. |
3033 | + * |
3034 | + * Authors: |
3035 | + * Jared Hulbert <jaredeh@gmail.com> |
3036 | + * |
3037 | + * Project url: http://axfs.sourceforge.net |
3038 | + * |
3039 | + * axfs_uml.c - |
3040 | + * Allows axfs to a UML kernels find_iomem() interface as an XIP device or |
3041 | + * dummy functions if this is not a UML build. |
3042 | + */ |
3043 | + |
3044 | +#include <linux/axfs.h> |
3045 | +#ifdef CONFIG_UML |
3046 | +#include <mem_user.h> |
3047 | +int axfs_get_uml_address(char *iomem, unsigned long *address, |
3048 | + unsigned long *length) |
3049 | +{ |
3050 | + *address = find_iomem(iomem, length); |
3051 | + if (!(*address)) { |
3052 | + printk(KERN_DEBUG "axfs: find_iomem() failed\n"); |
3053 | + return -EINVAL; |
3054 | + } |
3055 | + |
3056 | + if (*length < PAGE_SIZE) { |
3057 | + printk(KERN_DEBUG |
3058 | + "axfs: iomem() too small, must be at least %li Bytes\n", |
3059 | + PAGE_SIZE); |
3060 | + return -EINVAL; |
3061 | + } |
3062 | + return 0; |
3063 | +} |
3064 | +#else |
3065 | +int axfs_get_uml_address(char *iomem, unsigned long *address, |
3066 | + unsigned long *length) |
3067 | +{ |
3068 | + return 0; |
3069 | +} |
3070 | +#endif /* CONFIG_UML */ |
3071 | diff -Naur linux-2.6.24/fs/axfs/axfs_uncompress.c linux-2.6.24-axfs/fs/axfs/axfs_uncompress.c |
3072 | --- linux-2.6.24/fs/axfs/axfs_uncompress.c 1970-01-01 01:00:00.000000000 +0100 |
3073 | +++ linux-2.6.24-axfs/fs/axfs/axfs_uncompress.c 2008-08-24 19:12:32.000000000 +0200 |
3074 | @@ -0,0 +1,124 @@ |
3075 | +/* |
3076 | + * Advanced XIP File System for Linux - AXFS |
3077 | + * Readonly, compressed, and XIP filesystem for Linux systems big and small |
3078 | + * |
3079 | + * Modified in 2006 by Eric Anderson |
3080 | + * from the cramfs sources fs/cramfs/uncompress.c |
3081 | + * |
3082 | + * (C) Copyright 1999 Linus Torvalds |
3083 | + * |
3084 | + * axfs_uncompress.c - |
3085 | + * axfs interfaces to the uncompression library. There's really just |
3086 | + * three entrypoints: |
3087 | + * |
3088 | + * - axfs_uncompress_init() - called to initialize the thing. |
3089 | + * - axfs_uncompress_exit() - tell me when you're done |
3090 | + * - axfs_uncompress_block() - uncompress a block. |
3091 | + * |
3092 | + * NOTE NOTE NOTE! The uncompression is entirely single-threaded. We |
3093 | + * only have one stream, and we'll initialize it only once even if it |
3094 | + * then is used by multiple filesystems. |
3095 | + * |
3096 | + */ |
3097 | + |
3098 | +#ifndef ALL_VERSIONS |
3099 | +#include <linux/version.h> /* For multi-version support */ |
3100 | +#endif |
3101 | +#include <linux/errno.h> |
3102 | +#include <linux/vmalloc.h> |
3103 | +#include <linux/zlib.h> |
3104 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
3105 | +#include <linux/mutex.h> |
3106 | +#else |
3107 | +#include <linux/rwsem.h> |
3108 | +#endif |
3109 | + |
3110 | +static z_stream stream; |
3111 | +static int initialized; |
3112 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
3113 | +static struct mutex axfs_uncmp_mutex; |
3114 | +#else |
3115 | +static struct rw_semaphore axfs_uncmp_mutex; |
3116 | +#endif |
3117 | + |
3118 | +int axfs_uncompress_block(void *dst, int dstlen, void *src, int srclen) |
3119 | +{ |
3120 | + int err; |
3121 | + int out; |
3122 | + |
3123 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
3124 | + mutex_lock(&axfs_uncmp_mutex); |
3125 | +#else |
3126 | + down_write(&axfs_uncmp_mutex); |
3127 | +#endif |
3128 | + |
3129 | + stream.next_in = src; |
3130 | + stream.avail_in = srclen; |
3131 | + |
3132 | + stream.next_out = dst; |
3133 | + stream.avail_out = dstlen; |
3134 | + |
3135 | + err = zlib_inflateReset(&stream); |
3136 | + if (err != Z_OK) { |
3137 | + printk(KERN_ERR "zlib_inflateReset error %d\n", err); |
3138 | + zlib_inflateEnd(&stream); |
3139 | + zlib_inflateInit(&stream); |
3140 | + } |
3141 | + |
3142 | + err = zlib_inflate(&stream, Z_FINISH); |
3143 | + if (err != Z_STREAM_END) |
3144 | + goto err; |
3145 | + |
3146 | + out = stream.total_out; |
3147 | + |
3148 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
3149 | + mutex_unlock(&axfs_uncmp_mutex); |
3150 | +#else |
3151 | + up_write(&axfs_uncmp_mutex); |
3152 | +#endif |
3153 | + |
3154 | + return out; |
3155 | + |
3156 | +err: |
3157 | + |
3158 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
3159 | + mutex_unlock(&axfs_uncmp_mutex); |
3160 | +#else |
3161 | + up_write(&axfs_uncmp_mutex); |
3162 | +#endif |
3163 | + |
3164 | + printk(KERN_ERR "Error %d while decompressing!\n", err); |
3165 | + printk(KERN_ERR "%p(%d)->%p(%d)\n", src, srclen, dst, dstlen); |
3166 | + return 0; |
3167 | +} |
3168 | + |
3169 | +int axfs_uncompress_init(void) |
3170 | +{ |
3171 | + if (!initialized++) { |
3172 | + |
3173 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
3174 | + mutex_init(&axfs_uncmp_mutex); |
3175 | +#else |
3176 | + init_rwsem(&axfs_uncmp_mutex); |
3177 | +#endif |
3178 | + |
3179 | + stream.workspace = vmalloc(zlib_inflate_workspacesize()); |
3180 | + if (!stream.workspace) { |
3181 | + initialized = 0; |
3182 | + return -ENOMEM; |
3183 | + } |
3184 | + stream.next_in = NULL; |
3185 | + stream.avail_in = 0; |
3186 | + zlib_inflateInit(&stream); |
3187 | + } |
3188 | + return 0; |
3189 | +} |
3190 | + |
3191 | +int axfs_uncompress_exit(void) |
3192 | +{ |
3193 | + if (!--initialized) { |
3194 | + zlib_inflateEnd(&stream); |
3195 | + vfree(stream.workspace); |
3196 | + } |
3197 | + return 0; |
3198 | +} |
3199 | diff -Naur linux-2.6.24/fs/axfs/Makefile linux-2.6.24-axfs/fs/axfs/Makefile |
3200 | --- linux-2.6.24/fs/axfs/Makefile 1970-01-01 01:00:00.000000000 +0100 |
3201 | +++ linux-2.6.24-axfs/fs/axfs/Makefile 2008-08-24 19:12:32.000000000 +0200 |
3202 | @@ -0,0 +1,7 @@ |
3203 | +# |
3204 | +# Makefile for the linux axfs routines |
3205 | +# |
3206 | + |
3207 | +obj-$(CONFIG_AXFS) += axfs.o |
3208 | + |
3209 | +axfs-objs := axfs_inode.o axfs_super.o axfs_uncompress.o axfs_profiling.o axfs_uml.o axfs_mtd.o axfs_bdev.o axfs_physmem.o |
3210 | diff -Naur linux-2.6.24/fs/Kconfig linux-2.6.24-axfs/fs/Kconfig |
3211 | --- linux-2.6.24/fs/Kconfig 2008-08-24 19:12:03.000000000 +0200 |
3212 | +++ linux-2.6.24-axfs/fs/Kconfig 2008-08-24 19:12:32.000000000 +0200 |
3213 | @@ -1043,6 +1043,27 @@ |
3214 | |
3215 | menu "Miscellaneous filesystems" |
3216 | |
3217 | +config AXFS |
3218 | + tristate "Advanced XIP File System (AXFS) support (EXPERIMENTAL)" |
3219 | + select FS_XIP |
3220 | + select ZLIB_INFLATE |
3221 | + default n |
3222 | + help |
3223 | + The Advanced XIP File System or (AXFS) is a highly compressed |
3224 | + readonly filesystem like cramfs or squashfs. It also can be |
3225 | + configured to store individual pages of files compressed or |
3226 | + uncompressed as XIP pages. This allows for faster boot up and |
3227 | + application launch time with a smaller memory footprint. |
3228 | + |
3229 | +config AXFS_PROFILING |
3230 | + bool "Profiling extensions for AXFS (EXPERIMENTAL)" |
3231 | + depends on AXFS |
3232 | + default n |
3233 | + help |
3234 | + Profiling tooling used to identify what pages in the filesystem |
3235 | + image are actually accessed and how much. |
3236 | + |
3237 | + |
3238 | config ADFS_FS |
3239 | tristate "ADFS file system support (EXPERIMENTAL)" |
3240 | depends on BLOCK && EXPERIMENTAL |
3241 | diff -Naur linux-2.6.24/fs/Makefile linux-2.6.24-axfs/fs/Makefile |
3242 | --- linux-2.6.24/fs/Makefile 2008-08-24 19:12:03.000000000 +0200 |
3243 | +++ linux-2.6.24-axfs/fs/Makefile 2008-08-24 19:12:32.000000000 +0200 |
3244 | @@ -72,6 +72,7 @@ |
3245 | obj-$(CONFIG_JBD2) += jbd2/ |
3246 | obj-$(CONFIG_EXT2_FS) += ext2/ |
3247 | obj-$(CONFIG_CRAMFS) += cramfs/ |
3248 | +obj-$(CONFIG_AXFS) += axfs/ |
3249 | obj-$(CONFIG_SQUASHFS) += squashfs/ |
3250 | obj-y += ramfs/ |
3251 | obj-$(CONFIG_HUGETLBFS) += hugetlbfs/ |
3252 | diff -Naur linux-2.6.24/include/linux/axfs.h linux-2.6.24-axfs/include/linux/axfs.h |
3253 | --- linux-2.6.24/include/linux/axfs.h 1970-01-01 01:00:00.000000000 +0100 |
3254 | +++ linux-2.6.24-axfs/include/linux/axfs.h 2008-08-24 19:12:32.000000000 +0200 |
3255 | @@ -0,0 +1,375 @@ |
3256 | +/* |
3257 | + * Advanced XIP File System for Linux - AXFS |
3258 | + * Readonly, compressed, and XIP filesystem for Linux systems big and small |
3259 | + * |
3260 | + * Copyright(c) 2008 Numonyx |
3261 | + * |
3262 | + * This program is free software; you can redistribute it and/or modify it |
3263 | + * under the terms and conditions of the GNU General Public License, |
3264 | + * version 2, as published by the Free Software Foundation. |
3265 | + * |
3266 | + * Authors: |
3267 | + * Eric Anderson |
3268 | + * Jared Hulbert <jaredeh@gmail.com> |
3269 | + * Sujaya Srinivasan |
3270 | + * Justin Treon |
3271 | + * |
3272 | + * Project url: http://axfs.sourceforge.net |
3273 | + */ |
3274 | + |
3275 | +#ifndef __AXFS_H |
3276 | +#define __AXFS_H |
3277 | + |
3278 | +#ifndef ALL_VERSIONS |
3279 | +#include <linux/version.h> /* For multi-version support */ |
3280 | +#endif |
3281 | + |
3282 | +#ifdef __KERNEL__ |
3283 | +#include <linux/rwsem.h> |
3284 | +#endif |
3285 | +#include <linux/errno.h> |
3286 | +#include <linux/time.h> |
3287 | + |
3288 | +#define AXFS_MAGIC 0x48A0E4CD /* some random number */ |
3289 | +#define AXFS_SIGNATURE "Advanced XIP FS" |
3290 | +#define AXFS_MAXPATHLEN 255 |
3291 | + |
3292 | +/* Uncompression interfaces to the underlying zlib */ |
3293 | +int axfs_uncompress_block(void *, int, void *, int); |
3294 | +int axfs_uncompress_init(void); |
3295 | +int axfs_uncompress_exit(void); |
3296 | + |
3297 | +struct axfs_profiling_data { |
3298 | + u64 inode_number; |
3299 | + unsigned long count; |
3300 | +}; |
3301 | + |
3302 | +enum axfs_node_types { |
3303 | + XIP = 0, |
3304 | + Compressed, |
3305 | + Byte_Aligned, |
3306 | +}; |
3307 | + |
3308 | +enum axfs_compression_types { |
3309 | + ZLIB = 0 |
3310 | +}; |
3311 | + |
3312 | +/* |
3313 | + * on media struct describing a data region |
3314 | + */ |
3315 | +struct axfs_region_desc_onmedia { |
3316 | + u64 fsoffset; |
3317 | + u64 size; |
3318 | + u64 compressed_size; |
3319 | + u64 max_index; |
3320 | + u8 table_byte_depth; |
3321 | + u8 incore; |
3322 | +}; |
3323 | + |
3324 | +struct axfs_region_desc { |
3325 | + u64 fsoffset; |
3326 | + u64 size; |
3327 | + u64 compressed_size; |
3328 | + u64 max_index; |
3329 | + void *virt_addr; |
3330 | + u8 table_byte_depth; |
3331 | + u8 incore; |
3332 | +}; |
3333 | + |
3334 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,10) |
3335 | +#else |
3336 | +struct axfs_fill_super_info { |
3337 | + struct axfs_super_onmedia *onmedia_super_block; |
3338 | + unsigned long physical_start_address; |
3339 | + unsigned long virtual_start_address; |
3340 | +}; |
3341 | +#endif |
3342 | +/* |
3343 | + * axfs_super is the on media format for the super block it must be big endian |
3344 | + */ |
3345 | +struct axfs_super_onmedia { |
3346 | + u32 magic; /* 0x48A0E4CD - random number */ |
3347 | + u8 signature[16]; /* "Advanced XIP FS" */ |
3348 | + u8 digest[40]; /* sha1 digest for checking data integrity */ |
3349 | + u32 cblock_size; /* maximum size of the block being compressed */ |
3350 | + u64 files; /* number of inodes/files in fs */ |
3351 | + u64 size; /* total image size */ |
3352 | + u64 blocks; /* number of nodes in fs */ |
3353 | + u64 mmap_size; /* size of the memory mapped part of image */ |
3354 | + u64 strings; /* offset to strings region descriptor */ |
3355 | + u64 xip; /* offset to xip region descriptor */ |
3356 | + u64 byte_aligned; /* offset to the byte aligned region desc */ |
3357 | + u64 compressed; /* offset to the compressed region desc */ |
3358 | + u64 node_type; /* offset to node type region desc */ |
3359 | + u64 node_index; /* offset to node index region desc */ |
3360 | + u64 cnode_offset; /* offset to cnode offset region desc */ |
3361 | + u64 cnode_index; /* offset to cnode index region desc */ |
3362 | + u64 banode_offset; /* offset to banode offset region desc */ |
3363 | + u64 cblock_offset; /* offset to cblock offset region desc */ |
3364 | + u64 inode_file_size; /* offset to inode file size desc*/ |
3365 | + u64 inode_name_offset; /* offset to inode num_entries region desc */ |
3366 | + u64 inode_num_entries; /* offset to inode num_entries region desc */ |
3367 | + u64 inode_mode_index; /* offset to inode mode index region desc */ |
3368 | + u64 inode_array_index; /* offset to inode node index region desc */ |
3369 | + u64 modes; /* offset to mode mode region desc */ |
3370 | + u64 uids; /* offset to mode uid index region desc */ |
3371 | + u64 gids; /* offset to mode gid index region desc */ |
3372 | + u8 version_major; |
3373 | + u8 version_minor; |
3374 | + u8 version_sub; |
3375 | + u8 compression_type; /* Identifies type of compression used on FS */ |
3376 | + u64 timestamp; /* UNIX time_t of filesystem build time */ |
3377 | +}; |
3378 | + |
3379 | +/* |
3380 | + * axfs super-block data in core |
3381 | + */ |
3382 | +struct axfs_super { |
3383 | + u32 magic; |
3384 | + u8 version_major; |
3385 | + u8 version_minor; |
3386 | + u8 version_sub; |
3387 | + u8 padding; |
3388 | + u64 files; |
3389 | + u64 size; |
3390 | + u64 blocks; |
3391 | + u64 mmap_size; |
3392 | + struct axfs_region_desc strings; |
3393 | + struct axfs_region_desc xip; |
3394 | + struct axfs_region_desc compressed; |
3395 | + struct axfs_region_desc byte_aligned; |
3396 | + struct axfs_region_desc node_type; |
3397 | + struct axfs_region_desc node_index; |
3398 | + struct axfs_region_desc cnode_offset; |
3399 | + struct axfs_region_desc cnode_index; |
3400 | + struct axfs_region_desc banode_offset; |
3401 | + struct axfs_region_desc cblock_offset; |
3402 | + struct axfs_region_desc inode_file_size; |
3403 | + struct axfs_region_desc inode_name_offset; |
3404 | + struct axfs_region_desc inode_num_entries; |
3405 | + struct axfs_region_desc inode_mode_index; |
3406 | + struct axfs_region_desc inode_array_index; |
3407 | + struct axfs_region_desc modes; |
3408 | + struct axfs_region_desc uids; |
3409 | + struct axfs_region_desc gids; |
3410 | + unsigned long phys_start_addr; |
3411 | + unsigned long virt_start_addr; |
3412 | + char *second_dev; |
3413 | + unsigned long iomem_size; |
3414 | + void *mtd0; /* primary device */ |
3415 | + void *mtd1; /* secondary device */ |
3416 | + u32 cblock_size; |
3417 | + u64 current_cnode_index; |
3418 | + void *cblock_buffer[2]; |
3419 | + struct rw_semaphore lock; |
3420 | + struct axfs_profiling_data *profile_data_ptr; |
3421 | + u8 profiling_on; /* Determines if profiling is on or off */ |
3422 | + u8 mtd_pointed; |
3423 | + u8 compression_type; |
3424 | + struct timespec timestamp; |
3425 | +}; |
3426 | + |
3427 | +#define AXFS_PAGE_SIZE 4096 |
3428 | + |
3429 | +#define AXFS_SB(sb) (struct axfs_super *)((sb)->s_fs_info) |
3430 | +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,21) |
3431 | +#define AXFS_MTD(sb) (void *)((sb)->s_mtd) |
3432 | +#else |
3433 | +#define AXFS_MTD(sb) 0 |
3434 | +#endif |
3435 | +#define AXFS_MTD0(sb) (((AXFS_SB(sb))->mtd0) ? \ |
3436 | + ((AXFS_SB(sb))->mtd0) : (AXFS_MTD(sb))) |
3437 | +#define AXFS_MTD1(sb) ((AXFS_SB(sb))->mtd1) |
3438 | + |
3439 | +#define AXFS_BDEV(sb) ((sb)->s_bdev) |
3440 | + |
3441 | +#define AXFS_HAS_BDEV(sb) \ |
3442 | + ((AXFS_BDEV(sb) != NULL) ? TRUE : FALSE) |
3443 | +#define AXFS_HAS_MTD(sb) \ |
3444 | + (((AXFS_MTD0(sb) != NULL) || \ |
3445 | + (AXFS_MTD1(sb) != NULL) || \ |
3446 | + (AXFS_MTD(sb) != NULL)) ? TRUE : FALSE) |
3447 | + |
3448 | +#define AXFS_NODEV(sb) \ |
3449 | + ((!AXFS_HAS_MTD(sb) && !AXFS_HAS_BDEV(sb)) ? TRUE : FALSE) |
3450 | + |
3451 | +static inline u64 axfs_bytetable_stitch(u8 depth, u8 *table, u64 index) |
3452 | +{ |
3453 | + u64 i; |
3454 | + u64 output = 0; |
3455 | + u64 byte = 0; |
3456 | + u64 j; |
3457 | + u64 bits; |
3458 | + |
3459 | + for (i = 0; i < depth; i++) { |
3460 | + j = index * depth + i; |
3461 | + bits = 8 * (depth - i - 1); |
3462 | + byte = table[j]; |
3463 | + output += byte << bits; |
3464 | + } |
3465 | + return output; |
3466 | +} |
3467 | + |
3468 | +#define AXFS_GET_BYTETABLE_VAL(desc,index) \ |
3469 | + axfs_bytetable_stitch(((struct axfs_region_desc)(desc)).table_byte_depth,\ |
3470 | + (u8 *)((struct axfs_region_desc)(desc)).virt_addr, index) |
3471 | + |
3472 | +#define AXFS_GET_NODE_TYPE(sbi,node_index) \ |
3473 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->node_type,\ |
3474 | + (node_index)) |
3475 | + |
3476 | +#define AXFS_GET_NODE_INDEX(sbi,node__index) \ |
3477 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->node_index,\ |
3478 | + (node__index)) |
3479 | + |
3480 | +#define AXFS_IS_NODE_XIP(sbi,node_index) \ |
3481 | + (AXFS_GET_NODE_TYPE(sbi, (node_index)) == XIP) |
3482 | + |
3483 | +#define AXFS_GET_CNODE_INDEX(sbi,node_index) \ |
3484 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->cnode_index,\ |
3485 | + (node_index)) |
3486 | + |
3487 | +#define AXFS_GET_CNODE_OFFSET(desc,node_index) \ |
3488 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->cnode_offset,\ |
3489 | + (node_index)) |
3490 | + |
3491 | +#define AXFS_GET_BANODE_OFFSET(desc,node_index) \ |
3492 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->banode_offset,\ |
3493 | + (node_index)) |
3494 | + |
3495 | +#define AXFS_GET_CBLOCK_OFFSET(desc,node_index) \ |
3496 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->cblock_offset,\ |
3497 | + (node_index)) |
3498 | + |
3499 | +#define AXFS_GET_INODE_FILE_SIZE(sbi,inode_index) \ |
3500 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_file_size,\ |
3501 | + (inode_index)) |
3502 | + |
3503 | +#define AXFS_GET_INODE_NAME_OFFSET(sbi,inode_index) \ |
3504 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_name_offset,\ |
3505 | + (inode_index)) |
3506 | + |
3507 | +#define AXFS_GET_INODE_NUM_ENTRIES(sbi,inode_index) \ |
3508 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_num_entries,\ |
3509 | + (inode_index)) |
3510 | + |
3511 | +#define AXFS_GET_INODE_MODE_INDEX(sbi,inode_index) \ |
3512 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_mode_index,\ |
3513 | + (inode_index)) |
3514 | + |
3515 | +#define AXFS_GET_INODE_ARRAY_INDEX(sbi,inode_index) \ |
3516 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_array_index,\ |
3517 | + (inode_index)) |
3518 | + |
3519 | +#define AXFS_GET_MODE(sbi,mode_index) \ |
3520 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->modes,\ |
3521 | + (AXFS_GET_INODE_MODE_INDEX(sbi, (mode_index)))) |
3522 | + |
3523 | +#define AXFS_GET_UID(sbi,mode_index) \ |
3524 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->uids,\ |
3525 | + (AXFS_GET_INODE_MODE_INDEX(sbi, (mode_index)))) |
3526 | + |
3527 | +#define AXFS_GET_GID(sbi,mode_index) \ |
3528 | + AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->gids,\ |
3529 | + (AXFS_GET_INODE_MODE_INDEX(sbi, (mode_index)))) |
3530 | + |
3531 | +#define AXFS_IS_REGION_COMPRESSED(_region) \ |
3532 | + (( \ |
3533 | + ((struct axfs_region_desc *)(_region))->compressed_size > \ |
3534 | + 0 \ |
3535 | + ) ? TRUE : FALSE) |
3536 | + |
3537 | +#define AXFS_PHYSADDR_IS_VALID(sbi) \ |
3538 | + (((((struct axfs_super *)(sbi))->phys_start_addr) > 0 \ |
3539 | + ) ? TRUE : FALSE) |
3540 | + |
3541 | +#define AXFS_VIRTADDR_IS_VALID(sbi) \ |
3542 | + (((((struct axfs_super *)(sbi))->virt_start_addr) > 0 \ |
3543 | + ) ? TRUE : FALSE) |
3544 | + |
3545 | +#define AXFS_IS_IOMEM(sbi) \ |
3546 | + (((((struct axfs_super *)(sbi))->iomem_size) > 0) ? TRUE : FALSE) |
3547 | + |
3548 | +#define AXFS_IS_POINTED(sbi) \ |
3549 | + (((((struct axfs_super *)(sbi))->mtd_pointed) > 0) ? TRUE : FALSE) |
3550 | + |
3551 | +#define AXFS_IS_PHYSMEM(sbi) \ |
3552 | + (( \ |
3553 | + AXFS_PHYSADDR_IS_VALID(sbi) \ |
3554 | + && !AXFS_IS_IOMEM(sbi) \ |
3555 | + && !AXFS_IS_POINTED(sbi) \ |
3556 | + ) ? TRUE : FALSE) |
3557 | + |
3558 | +#define AXFS_IS_MMAPABLE(sbi,offset) \ |
3559 | + ((\ |
3560 | + (((struct axfs_super *)(sbi))->mmap_size) > (offset) \ |
3561 | + ) ? TRUE : FALSE) |
3562 | + |
3563 | +#define AXFS_IS_OFFSET_MMAPABLE(sbi,offset) \ |
3564 | + (( \ |
3565 | + AXFS_IS_MMAPABLE(sbi, offset) && AXFS_VIRTADDR_IS_VALID(sbi) \ |
3566 | + ) ? TRUE : FALSE) |
3567 | + |
3568 | +#define AXFS_IS_REGION_MMAPABLE(sbi,_region) \ |
3569 | + (( \ |
3570 | + AXFS_IS_MMAPABLE(sbi, ((struct axfs_region_desc *)(_region))->fsoffset) \ |
3571 | + && AXFS_VIRTADDR_IS_VALID(sbi) \ |
3572 | + ) ? TRUE : FALSE) |
3573 | + |
3574 | +#define AXFS_IS_REGION_INCORE(_region) \ |
3575 | + (((_region)->incore > 0) ? TRUE : FALSE) |
3576 | + |
3577 | +#define AXFS_IS_REGION_XIP(sbi,_region) \ |
3578 | + (( \ |
3579 | + !AXFS_IS_REGION_COMPRESSED(_region) && \ |
3580 | + !AXFS_IS_REGION_INCORE(_region) && \ |
3581 | + AXFS_IS_REGION_MMAPABLE(sbi,_region) \ |
3582 | + ) ? TRUE : FALSE) |
3583 | + |
3584 | +#define AXFS_GET_XIP_REGION_PHYSADDR(sbi) \ |
3585 | + (unsigned long)((sbi)->phys_start_addr + (sbi)->xip.fsoffset) |
3586 | + |
3587 | +#define AXFS_GET_INODE_NAME(sbi,inode_index) \ |
3588 | + (char *)( \ |
3589 | + (sbi)->strings.virt_addr \ |
3590 | + + AXFS_GET_INODE_NAME_OFFSET(sbi,inode_index) \ |
3591 | + ) |
3592 | + |
3593 | +#define AXFS_GET_CBLOCK_ADDRESS(sbi, cnode_index)\ |
3594 | + (unsigned long)( \ |
3595 | + (sbi)->compressed.virt_addr \ |
3596 | + + AXFS_GET_CBLOCK_OFFSET(sbi, cnode_index) \ |
3597 | + ) |
3598 | + |
3599 | +#define AXFS_GET_NODE_ADDRESS(sbi,node__index) \ |
3600 | + (unsigned long)( \ |
3601 | + (sbi)->node_index.virt_addr \ |
3602 | + + AXFS_GET_NODE_INDEX(sbi, node__index) \ |
3603 | + ) |
3604 | + |
3605 | +#define AXFS_GET_BANODE_ADDRESS(sbi,banode_index) \ |
3606 | + (unsigned long)( \ |
3607 | + (sbi)->byte_aligned.virt_addr \ |
3608 | + + AXFS_GET_BANODE_OFFSET(sbi, banode_index) \ |
3609 | + ) |
3610 | + |
3611 | +#define AXFS_FSOFFSET_2_DEVOFFSET(sbi,fsoffset) \ |
3612 | + (( \ |
3613 | + ((sbi)->phys_start_addr == 0) && ((sbi)->virt_start_addr == 0) \ |
3614 | + ) ? (fsoffset) : (fsoffset - (sbi)->mmap_size) \ |
3615 | + ) |
3616 | + |
3617 | +#define AXFS_GET_CBLOCK_LENGTH(sbi,cblock_index) \ |
3618 | + (u64)( \ |
3619 | + (u64)AXFS_GET_CBLOCK_OFFSET(sbi, ((u64)(cblock_index)+(u64)1)) \ |
3620 | + - (u64)AXFS_GET_CBLOCK_OFFSET(sbi, (cblock_index)) \ |
3621 | + ) |
3622 | + |
3623 | +#ifndef TRUE |
3624 | +#define TRUE 1 |
3625 | +#endif |
3626 | +#ifndef FALSE |
3627 | +#define FALSE 0 |
3628 | +#endif |
3629 | + |
3630 | +#endif |