Annotation of /trunk/kernel26-alx/patches-2.6.26-r1/0162-2.6.26-axfs-svn18.patch
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Wed Sep 17 19:42:13 2008 UTC (16 years ago) by niro
File size: 98252 byte(s)
Wed Sep 17 19:42:13 2008 UTC (16 years ago) by niro
File size: 98252 byte(s)
-2.6.26-alx-r1
1 | niro | 681 | diff -Naur linux-2.6.26/fs/axfs/axfs_bdev.c linux-2.6.26-magellan/fs/axfs/axfs_bdev.c |
2 | --- linux-2.6.26/fs/axfs/axfs_bdev.c 1970-01-01 01:00:00.000000000 +0100 | ||
3 | +++ linux-2.6.26-magellan/fs/axfs/axfs_bdev.c 2008-09-17 21:26:20.000000000 +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-2.6.26/fs/axfs/axfs_inode.c linux-2.6.26-magellan/fs/axfs/axfs_inode.c | ||
185 | --- linux-2.6.26/fs/axfs/axfs_inode.c 1970-01-01 01:00:00.000000000 +0100 | ||
186 | +++ linux-2.6.26-magellan/fs/axfs/axfs_inode.c 2008-09-17 21:26:20.000000000 +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-2.6.26/fs/axfs/axfs_mtd.c linux-2.6.26-magellan/fs/axfs/axfs_mtd.c | ||
900 | --- linux-2.6.26/fs/axfs/axfs_mtd.c 1970-01-01 01:00:00.000000000 +0100 | ||
901 | +++ linux-2.6.26-magellan/fs/axfs/axfs_mtd.c 2008-09-17 21:26:20.000000000 +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-2.6.26/fs/axfs/axfs_physmem.c linux-2.6.26-magellan/fs/axfs/axfs_physmem.c | ||
1410 | --- linux-2.6.26/fs/axfs/axfs_physmem.c 1970-01-01 01:00:00.000000000 +0100 | ||
1411 | +++ linux-2.6.26-magellan/fs/axfs/axfs_physmem.c 2008-09-17 21:26:20.000000000 +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-2.6.26/fs/axfs/axfs_profiling.c linux-2.6.26-magellan/fs/axfs/axfs_profiling.c | ||
1483 | --- linux-2.6.26/fs/axfs/axfs_profiling.c 1970-01-01 01:00:00.000000000 +0100 | ||
1484 | +++ linux-2.6.26-magellan/fs/axfs/axfs_profiling.c 2008-09-17 21:26:20.000000000 +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-2.6.26/fs/axfs/axfs_super.c linux-2.6.26-magellan/fs/axfs/axfs_super.c | ||
2089 | --- linux-2.6.26/fs/axfs/axfs_super.c 1970-01-01 01:00:00.000000000 +0100 | ||
2090 | +++ linux-2.6.26-magellan/fs/axfs/axfs_super.c 2008-09-17 21:26:20.000000000 +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-2.6.26/fs/axfs/axfs_uml.c linux-2.6.26-magellan/fs/axfs/axfs_uml.c | ||
3021 | --- linux-2.6.26/fs/axfs/axfs_uml.c 1970-01-01 01:00:00.000000000 +0100 | ||
3022 | +++ linux-2.6.26-magellan/fs/axfs/axfs_uml.c 2008-09-17 21:26:20.000000000 +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-2.6.26/fs/axfs/axfs_uncompress.c linux-2.6.26-magellan/fs/axfs/axfs_uncompress.c | ||
3072 | --- linux-2.6.26/fs/axfs/axfs_uncompress.c 1970-01-01 01:00:00.000000000 +0100 | ||
3073 | +++ linux-2.6.26-magellan/fs/axfs/axfs_uncompress.c 2008-09-17 21:26:20.000000000 +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-2.6.26/fs/axfs/Makefile linux-2.6.26-magellan/fs/axfs/Makefile | ||
3200 | --- linux-2.6.26/fs/axfs/Makefile 1970-01-01 01:00:00.000000000 +0100 | ||
3201 | +++ linux-2.6.26-magellan/fs/axfs/Makefile 2008-09-17 21:26:20.000000000 +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-2.6.26/fs/Kconfig linux-2.6.26-magellan/fs/Kconfig | ||
3211 | --- linux-2.6.26/fs/Kconfig 2008-09-17 21:27:50.000000000 +0200 | ||
3212 | +++ linux-2.6.26-magellan/fs/Kconfig 2008-09-17 21:26:20.000000000 +0200 | ||
3213 | @@ -1076,6 +1076,27 @@ | ||
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-2.6.26/fs/Makefile linux-2.6.26-magellan/fs/Makefile | ||
3242 | --- linux-2.6.26/fs/Makefile 2008-09-17 21:27:50.000000000 +0200 | ||
3243 | +++ linux-2.6.26-magellan/fs/Makefile 2008-09-17 21:26:20.000000000 +0200 | ||
3244 | @@ -74,6 +74,7 @@ | ||
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-2.6.26/include/linux/axfs.h linux-2.6.26-magellan/include/linux/axfs.h | ||
3253 | --- linux-2.6.26/include/linux/axfs.h 1970-01-01 01:00:00.000000000 +0100 | ||
3254 | +++ linux-2.6.26-magellan/include/linux/axfs.h 2008-09-17 21:26:20.000000000 +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 |