2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2011 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * Luc van OostenRyck for numerous patches.
10 * Nick Bane for numerous patches.
11 * Nick Bane for 2.5/2.6 integration.
12 * Andras Toth for mknod rdev issue.
13 * Michael Fischer for finding the problem with inode inconsistency.
14 * Some code bodily lifted from JFFS
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as
18 * published by the Free Software Foundation.
23 * This is the file system front-end to YAFFS that hooks it up to
27 * >> 2.4: sb->u.generic_sbp points to the struct yaffs_dev associated with
29 * >> 2.6: sb->s_fs_info points to the struct yaffs_dev associated with this
31 * >> inode->u.generic_ip points to the associated struct yaffs_obj.
35 * There are two variants of the VFS glue code. This variant should compile
36 * for any version of Linux.
38 #include <linux/version.h>
40 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
41 #define YAFFS_COMPILE_BACKGROUND
42 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23))
43 #define YAFFS_COMPILE_FREEZER
47 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28))
48 #define YAFFS_COMPILE_EXPORTFS
51 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
52 #define YAFFS_USE_SETATTR_COPY
53 #define YAFFS_USE_TRUNCATE_SETSIZE
55 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
56 #define YAFFS_HAS_EVICT_INODE
59 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
60 #define YAFFS_NEW_FOLLOW_LINK 1
62 #define YAFFS_NEW_FOLLOW_LINK 0
65 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
66 #include <linux/config.h>
69 #include <linux/kernel.h>
70 #include <linux/module.h>
71 #include <linux/slab.h>
72 #include <linux/init.h>
74 #include <linux/proc_fs.h>
75 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39))
76 #include <linux/smp_lock.h>
78 #include <linux/pagemap.h>
79 #include <linux/mtd/mtd.h>
80 #include <linux/interrupt.h>
81 #include <linux/string.h>
82 #include <linux/ctype.h>
84 #if (YAFFS_NEW_FOLLOW_LINK == 1)
85 #include <linux/namei.h>
88 #ifdef YAFFS_COMPILE_EXPORTFS
89 #include <linux/exportfs.h>
92 #ifdef YAFFS_COMPILE_BACKGROUND
93 #include <linux/kthread.h>
94 #include <linux/delay.h>
96 #ifdef YAFFS_COMPILE_FREEZER
97 #include <linux/freezer.h>
100 #include <asm/div64.h>
102 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
104 #include <linux/statfs.h>
106 #define UnlockPage(p) unlock_page(p)
107 #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
109 /* FIXME: use sb->s_id instead ? */
110 #define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
114 #include <linux/locks.h>
115 #define BDEVNAME_SIZE 0
116 #define yaffs_devname(sb, buf) kdevname(sb->s_dev)
118 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
119 /* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
125 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
126 #define YPROC_ROOT (&proc_root)
128 #define YPROC_ROOT NULL
131 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
132 #define Y_INIT_TIMER(a) init_timer(a)
134 #define Y_INIT_TIMER(a) init_timer_on_stack(a)
137 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
138 #define WRITE_SIZE_STR "writesize"
139 #define WRITE_SIZE(mtd) ((mtd)->writesize)
141 #define WRITE_SIZE_STR "oobblock"
142 #define WRITE_SIZE(mtd) ((mtd)->oobblock)
145 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
146 #define YAFFS_USE_WRITE_BEGIN_END 1
148 #define YAFFS_USE_WRITE_BEGIN_END 0
151 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
152 static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
154 uint64_t result = partition_size;
155 do_div(result, block_size);
156 return (uint32_t) result;
159 #define YCALCBLOCKS(s, b) ((s)/(b))
162 #include <linux/uaccess.h>
163 #include <linux/mtd/mtd.h>
165 #include "yportenv.h"
166 #include "yaffs_trace.h"
167 #include "yaffs_guts.h"
168 #include "yaffs_attribs.h"
170 #include "yaffs_linux.h"
172 #include "yaffs_mtdif.h"
173 #include "yaffs_mtdif1.h"
174 #include "yaffs_mtdif2.h"
176 unsigned int yaffs_trace_mask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS;
177 unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
178 unsigned int yaffs_auto_checkpoint = 1;
179 unsigned int yaffs_gc_control = 1;
180 unsigned int yaffs_bg_enable = 1;
181 unsigned int yaffs_auto_select = 1;
182 /* Module Parameters */
183 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
184 module_param(yaffs_trace_mask, uint, 0644);
185 module_param(yaffs_wr_attempts, uint, 0644);
186 module_param(yaffs_auto_checkpoint, uint, 0644);
187 module_param(yaffs_gc_control, uint, 0644);
188 module_param(yaffs_bg_enable, uint, 0644);
190 MODULE_PARM(yaffs_trace_mask, "i");
191 MODULE_PARM(yaffs_wr_attempts, "i");
192 MODULE_PARM(yaffs_auto_checkpoint, "i");
193 MODULE_PARM(yaffs_gc_control, "i");
196 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
197 /* use iget and read_inode */
198 #define Y_IGET(sb, inum) iget((sb), (inum))
199 static void yaffs_read_inode(struct inode *inode);
202 /* Call local equivalent */
203 #define YAFFS_USE_OWN_IGET
204 #define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
206 static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
209 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
210 #define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private)
212 #define yaffs_inode_to_obj_lv(iptr) ((iptr)->u.generic_ip)
215 #define yaffs_inode_to_obj(iptr) \
216 ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
217 #define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode)
219 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
220 #define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info)
222 #define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->u.generic_sbp)
225 #define update_dir_time(dir) do {\
226 (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
229 static void yaffs_put_super(struct super_block *sb);
231 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
233 static ssize_t yaffs_hold_space(struct file *f);
234 static void yaffs_release_space(struct file *f);
236 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
237 static int yaffs_file_flush(struct file *file, fl_owner_t id);
239 static int yaffs_file_flush(struct file *file);
242 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
243 static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync);
244 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
245 static int yaffs_sync_object(struct file *file, int datasync);
247 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
251 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
253 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
254 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
255 struct nameidata *n);
256 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
257 struct nameidata *n);
259 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
260 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
262 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
263 struct dentry *dentry);
264 static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
265 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
266 const char *symname);
267 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
269 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
270 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
273 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
276 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
277 struct inode *new_dir, struct dentry *new_dentry);
278 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
280 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
281 static int yaffs_sync_fs(struct super_block *sb, int wait);
282 static void yaffs_write_super(struct super_block *sb);
284 static int yaffs_sync_fs(struct super_block *sb);
285 static int yaffs_write_super(struct super_block *sb);
288 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
289 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
290 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
291 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
293 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
296 #ifdef YAFFS_HAS_PUT_INODE
297 static void yaffs_put_inode(struct inode *inode);
300 #ifdef YAFFS_HAS_EVICT_INODE
301 static void yaffs_evict_inode(struct inode *);
303 static void yaffs_delete_inode(struct inode *);
304 static void yaffs_clear_inode(struct inode *);
307 static int yaffs_readpage(struct file *file, struct page *page);
308 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
309 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
311 static int yaffs_writepage(struct page *page);
314 static int yaffs_setxattr(struct dentry *dentry, const char *name,
315 const void *value, size_t size, int flags);
316 static ssize_t yaffs_getxattr(struct dentry *dentry, const char *name,
317 void *buff, size_t size);
318 static int yaffs_removexattr(struct dentry *dentry, const char *name);
319 static ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size);
321 #if (YAFFS_USE_WRITE_BEGIN_END != 0)
322 static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
323 loff_t pos, unsigned len, unsigned flags,
324 struct page **pagep, void **fsdata);
325 static int yaffs_write_end(struct file *filp, struct address_space *mapping,
326 loff_t pos, unsigned len, unsigned copied,
327 struct page *pg, void *fsdadata);
329 static int yaffs_prepare_write(struct file *f, struct page *pg,
330 unsigned offset, unsigned to);
331 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
336 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
338 #if (YAFFS_NEW_FOLLOW_LINK == 1)
339 void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
340 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
342 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
345 static void yaffs_touch_super(struct yaffs_dev *dev);
347 static int yaffs_vfs_setattr(struct inode *, struct iattr *);
349 static struct address_space_operations yaffs_file_address_operations = {
350 .readpage = yaffs_readpage,
351 .writepage = yaffs_writepage,
352 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
353 .write_begin = yaffs_write_begin,
354 .write_end = yaffs_write_end,
356 .prepare_write = yaffs_prepare_write,
357 .commit_write = yaffs_commit_write,
361 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
362 static const struct file_operations yaffs_file_operations = {
363 .read = do_sync_read,
364 .write = do_sync_write,
365 .aio_read = generic_file_aio_read,
366 .aio_write = generic_file_aio_write,
367 .mmap = generic_file_mmap,
368 .flush = yaffs_file_flush,
369 .fsync = yaffs_sync_object,
370 .splice_read = generic_file_splice_read,
371 .splice_write = generic_file_splice_write,
372 .llseek = generic_file_llseek,
375 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
377 static const struct file_operations yaffs_file_operations = {
378 .read = do_sync_read,
379 .write = do_sync_write,
380 .aio_read = generic_file_aio_read,
381 .aio_write = generic_file_aio_write,
382 .mmap = generic_file_mmap,
383 .flush = yaffs_file_flush,
384 .fsync = yaffs_sync_object,
385 .sendfile = generic_file_sendfile,
390 static const struct file_operations yaffs_file_operations = {
391 .read = generic_file_read,
392 .write = generic_file_write,
393 .mmap = generic_file_mmap,
394 .flush = yaffs_file_flush,
395 .fsync = yaffs_sync_object,
396 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
397 .sendfile = generic_file_sendfile,
402 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
403 static void zero_user_segment(struct page *page, unsigned start, unsigned end)
405 void *kaddr = kmap_atomic(page, KM_USER0);
406 memset(kaddr + start, 0, end - start);
407 kunmap_atomic(kaddr, KM_USER0);
408 flush_dcache_page(page);
412 static const struct inode_operations yaffs_file_inode_operations = {
413 .setattr = yaffs_setattr,
414 .setxattr = yaffs_setxattr,
415 .getxattr = yaffs_getxattr,
416 .listxattr = yaffs_listxattr,
417 .removexattr = yaffs_removexattr,
420 static const struct inode_operations yaffs_symlink_inode_operations = {
421 .readlink = yaffs_readlink,
422 .follow_link = yaffs_follow_link,
423 #if (YAFFS_NEW_FOLLOW_LINK == 1)
424 .put_link = yaffs_put_link,
426 .setattr = yaffs_setattr,
427 .setxattr = yaffs_setxattr,
428 .getxattr = yaffs_getxattr,
429 .listxattr = yaffs_listxattr,
430 .removexattr = yaffs_removexattr,
433 static const struct inode_operations yaffs_dir_inode_operations = {
434 .create = yaffs_create,
435 .lookup = yaffs_lookup,
437 .unlink = yaffs_unlink,
438 .symlink = yaffs_symlink,
439 .mkdir = yaffs_mkdir,
440 .rmdir = yaffs_unlink,
441 .mknod = yaffs_mknod,
442 .rename = yaffs_rename,
443 .setattr = yaffs_setattr,
444 .setxattr = yaffs_setxattr,
445 .getxattr = yaffs_getxattr,
446 .listxattr = yaffs_listxattr,
447 .removexattr = yaffs_removexattr,
450 static const struct file_operations yaffs_dir_operations = {
451 .read = generic_read_dir,
452 .readdir = yaffs_readdir,
453 .fsync = yaffs_sync_object,
454 .llseek = generic_file_llseek,
457 static const struct super_operations yaffs_super_ops = {
458 .statfs = yaffs_statfs,
460 #ifndef YAFFS_USE_OWN_IGET
461 .read_inode = yaffs_read_inode,
463 #ifdef YAFFS_HAS_PUT_INODE
464 .put_inode = yaffs_put_inode,
466 .put_super = yaffs_put_super,
467 #ifdef YAFFS_HAS_EVICT_INODE
468 .evict_inode = yaffs_evict_inode,
470 .delete_inode = yaffs_delete_inode,
471 .clear_inode = yaffs_clear_inode,
473 .sync_fs = yaffs_sync_fs,
474 .write_super = yaffs_write_super,
477 static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
479 #ifdef YAFFS_USE_SETATTR_COPY
480 setattr_copy(inode, attr);
483 return inode_setattr(inode, attr);
488 static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
490 #ifdef YAFFS_USE_TRUNCATE_SETSIZE
491 truncate_setsize(inode, newsize);
494 truncate_inode_pages(&inode->i_data, newsize);
500 static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
502 return yaffs_gc_control;
505 static void yaffs_gross_lock(struct yaffs_dev *dev)
507 yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current);
508 mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock));
509 yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current);
512 static void yaffs_gross_unlock(struct yaffs_dev *dev)
514 yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current);
515 mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
518 #ifdef YAFFS_COMPILE_EXPORTFS
520 static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
523 return Y_IGET(sb, ino);
526 static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb,
527 struct fid *fid, int fh_len,
530 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
531 yaffs2_nfs_get_inode);
534 static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
535 struct fid *fid, int fh_len,
538 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
539 yaffs2_nfs_get_inode);
542 struct dentry *yaffs2_get_parent(struct dentry *dentry)
545 struct super_block *sb = dentry->d_inode->i_sb;
546 struct dentry *parent = ERR_PTR(-ENOENT);
548 unsigned long parent_ino;
549 struct yaffs_obj *d_obj;
550 struct yaffs_obj *parent_obj;
552 d_obj = yaffs_inode_to_obj(dentry->d_inode);
555 parent_obj = d_obj->parent;
557 parent_ino = yaffs_get_obj_inode(parent_obj);
558 inode = Y_IGET(sb, parent_ino);
561 parent = ERR_CAST(inode);
563 parent = d_obtain_alias(inode);
564 if (!IS_ERR(parent)) {
565 parent = ERR_PTR(-ENOMEM);
575 /* Just declare a zero structure as a NULL value implies
576 * using the default functions of exportfs.
579 static struct export_operations yaffs_export_ops = {
580 .fh_to_dentry = yaffs2_fh_to_dentry,
581 .fh_to_parent = yaffs2_fh_to_parent,
582 .get_parent = yaffs2_get_parent,
587 /*-----------------------------------------------------------------*/
588 /* Directory search context allows us to unlock access to yaffs during
589 * filldir without causing problems with the directory being modified.
590 * This is similar to the tried and tested mechanism used in yaffs direct.
592 * A search context iterates along a doubly linked list of siblings in the
593 * directory. If the iterating object is deleted then this would corrupt
594 * the list iteration, likely causing a crash. The search context avoids
595 * this by using the remove_obj_fn to move the search context to the
596 * next object before the object is deleted.
598 * Many readdirs (and thus seach conexts) may be alive simulateously so
599 * each struct yaffs_dev has a list of these.
601 * A seach context lives for the duration of a readdir.
603 * All these functions must be called while yaffs is locked.
606 struct yaffs_search_context {
607 struct yaffs_dev *dev;
608 struct yaffs_obj *dir_obj;
609 struct yaffs_obj *next_return;
610 struct list_head others;
614 * yaffs_new_search() creates a new search context, initialises it and
615 * adds it to the device's search context list.
617 * Called at start of readdir.
619 static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir)
621 struct yaffs_dev *dev = dir->my_dev;
622 struct yaffs_search_context *sc =
623 kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
627 if (list_empty(&sc->dir_obj->variant.dir_variant.children))
628 sc->next_return = NULL;
631 list_entry(dir->variant.dir_variant.children.next,
632 struct yaffs_obj, siblings);
633 INIT_LIST_HEAD(&sc->others);
634 list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
640 * yaffs_search_end() disposes of a search context and cleans up.
642 static void yaffs_search_end(struct yaffs_search_context *sc)
645 list_del(&sc->others);
651 * yaffs_search_advance() moves a search context to the next object.
652 * Called when the search iterates or when an object removal causes
653 * the search context to be moved to the next object.
655 static void yaffs_search_advance(struct yaffs_search_context *sc)
660 if (sc->next_return == NULL ||
661 list_empty(&sc->dir_obj->variant.dir_variant.children))
662 sc->next_return = NULL;
664 struct list_head *next = sc->next_return->siblings.next;
666 if (next == &sc->dir_obj->variant.dir_variant.children)
667 sc->next_return = NULL; /* end of list */
670 list_entry(next, struct yaffs_obj, siblings);
675 * yaffs_remove_obj_callback() is called when an object is unlinked.
676 * We check open search contexts and advance any which are currently
677 * on the object being iterated.
679 static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
683 struct yaffs_search_context *sc;
684 struct list_head *search_contexts =
685 &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
687 /* Iterate through the directory search contexts.
688 * If any are currently on the object being removed, then advance
689 * the search context to the next object to prevent a hanging pointer.
691 list_for_each(i, search_contexts) {
692 sc = list_entry(i, struct yaffs_search_context, others);
693 if (sc->next_return == obj)
694 yaffs_search_advance(sc);
699 /*-----------------------------------------------------------------*/
701 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
704 unsigned char *alias;
707 struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
709 yaffs_gross_lock(dev);
711 alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
713 yaffs_gross_unlock(dev);
718 ret = vfs_readlink(dentry, buffer, buflen, alias);
723 #if (YAFFS_NEW_FOLLOW_LINK == 1)
724 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
728 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
732 unsigned char *alias;
734 struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
736 yaffs_gross_lock(dev);
738 alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
739 yaffs_gross_unlock(dev);
745 #if (YAFFS_NEW_FOLLOW_LINK == 1)
746 nd_set_link(nd, alias);
750 ret = ERR_PTR(ret_int);
753 ret = vfs_follow_link(nd, alias);
762 #if (YAFFS_NEW_FOLLOW_LINK == 1)
763 void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
769 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
770 struct yaffs_obj *obj);
773 * Lookup is used to find objects in the fs
775 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
777 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
780 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
783 struct yaffs_obj *obj;
784 struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
786 struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
788 if (current != yaffs_dev_to_lc(dev)->readdir_process)
789 yaffs_gross_lock(dev);
791 yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup for %d:%s",
792 yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name);
794 obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
796 obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
798 /* Can't hold gross lock when calling yaffs_get_inode() */
799 if (current != yaffs_dev_to_lc(dev)->readdir_process)
800 yaffs_gross_unlock(dev);
803 yaffs_trace(YAFFS_TRACE_OS,
804 "yaffs_lookup found %d", obj->obj_id);
806 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
808 yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
812 /* added NCB for 2.5/6 compatability - forces add even if inode is
813 * NULL which creates dentry hash */
814 d_add(dentry, inode);
819 #ifdef YAFFS_HAS_PUT_INODE
821 /* For now put inode is just for debugging
822 * Put inode is called when the inode **structure** is put.
824 static void yaffs_put_inode(struct inode *inode)
826 yaffs_trace(YAFFS_TRACE_OS,
827 "yaffs_put_inode: ino %d, count %d"),
828 (int)inode->i_ino, atomic_read(&inode->i_count);
833 static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj)
835 /* Clear the association between the inode and
836 * the struct yaffs_obj.
838 obj->my_inode = NULL;
839 yaffs_inode_to_obj_lv(inode) = NULL;
841 /* If the object freeing was deferred, then the real
843 * This should fix the inode inconsistency problem.
845 yaffs_handle_defered_free(obj);
848 #ifdef YAFFS_HAS_EVICT_INODE
849 /* yaffs_evict_inode combines into one operation what was previously done in
850 * yaffs_clear_inode() and yaffs_delete_inode()
853 static void yaffs_evict_inode(struct inode *inode)
855 struct yaffs_obj *obj;
856 struct yaffs_dev *dev;
859 obj = yaffs_inode_to_obj(inode);
861 yaffs_trace(YAFFS_TRACE_OS,
862 "yaffs_evict_inode: ino %d, count %d %s",
863 (int)inode->i_ino, atomic_read(&inode->i_count),
864 obj ? "object exists" : "null object");
866 if (!inode->i_nlink && !is_bad_inode(inode))
868 truncate_inode_pages(&inode->i_data, 0);
869 end_writeback(inode);
871 if (deleteme && obj) {
873 yaffs_gross_lock(dev);
875 yaffs_gross_unlock(dev);
879 yaffs_gross_lock(dev);
880 yaffs_unstitch_obj(inode, obj);
881 yaffs_gross_unlock(dev);
886 /* clear is called to tell the fs to release any per-inode data it holds.
887 * The object might still exist on disk and is just being thrown out of the cache
888 * or else the object has actually been deleted and we're being called via
890 * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
893 static void yaffs_clear_inode(struct inode *inode)
895 struct yaffs_obj *obj;
896 struct yaffs_dev *dev;
898 obj = yaffs_inode_to_obj(inode);
900 yaffs_trace(YAFFS_TRACE_OS,
901 "yaffs_clear_inode: ino %d, count %d %s",
902 (int)inode->i_ino, atomic_read(&inode->i_count),
903 obj ? "object exists" : "null object");
907 yaffs_gross_lock(dev);
908 yaffs_unstitch_obj(inode, obj);
909 yaffs_gross_unlock(dev);
914 /* delete is called when the link count is zero and the inode
915 * is put (ie. nobody wants to know about it anymore, time to
917 * NB Must call clear_inode()
919 static void yaffs_delete_inode(struct inode *inode)
921 struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
922 struct yaffs_dev *dev;
924 yaffs_trace(YAFFS_TRACE_OS,
925 "yaffs_delete_inode: ino %d, count %d %s",
926 (int)inode->i_ino, atomic_read(&inode->i_count),
927 obj ? "object exists" : "null object");
931 yaffs_gross_lock(dev);
933 yaffs_gross_unlock(dev);
935 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
936 truncate_inode_pages(&inode->i_data, 0);
942 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
943 static int yaffs_file_flush(struct file *file, fl_owner_t id)
945 static int yaffs_file_flush(struct file *file)
948 struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
950 struct yaffs_dev *dev = obj->my_dev;
952 yaffs_trace(YAFFS_TRACE_OS,
953 "yaffs_file_flush object %d (%s)",
955 obj->dirty ? "dirty" : "clean");
957 yaffs_gross_lock(dev);
959 yaffs_flush_file(obj, 1, 0);
961 yaffs_gross_unlock(dev);
966 static int yaffs_readpage_nolock(struct file *f, struct page *pg)
968 /* Lifted from jffs2 */
970 struct yaffs_obj *obj;
971 unsigned char *pg_buf;
974 struct yaffs_dev *dev;
976 yaffs_trace(YAFFS_TRACE_OS,
977 "yaffs_readpage_nolock at %08x, size %08x",
978 (unsigned)(pg->index << PAGE_CACHE_SHIFT),
979 (unsigned)PAGE_CACHE_SIZE);
981 obj = yaffs_dentry_to_obj(f->f_dentry);
985 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
986 BUG_ON(!PageLocked(pg));
993 /* FIXME: Can kmap fail? */
995 yaffs_gross_lock(dev);
997 ret = yaffs_file_rd(obj, pg_buf,
998 pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);
1000 yaffs_gross_unlock(dev);
1006 ClearPageUptodate(pg);
1009 SetPageUptodate(pg);
1013 flush_dcache_page(pg);
1016 yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done");
1020 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
1022 int ret = yaffs_readpage_nolock(f, pg);
1027 static int yaffs_readpage(struct file *f, struct page *pg)
1031 yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage");
1032 ret = yaffs_readpage_unlock(f, pg);
1033 yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done");
1037 /* writepage inspired by/stolen from smbfs */
1039 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1040 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
1042 static int yaffs_writepage(struct page *page)
1045 struct yaffs_dev *dev;
1046 struct address_space *mapping = page->mapping;
1047 struct inode *inode;
1048 unsigned long end_index;
1050 struct yaffs_obj *obj;
1057 inode = mapping->host;
1060 i_size = i_size_read(inode);
1062 end_index = i_size >> PAGE_CACHE_SHIFT;
1064 if (page->index < end_index)
1065 n_bytes = PAGE_CACHE_SIZE;
1067 n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
1069 if (page->index > end_index || !n_bytes) {
1070 yaffs_trace(YAFFS_TRACE_OS,
1071 "yaffs_writepage at %08x, inode size = %08x!!",
1072 (unsigned)(page->index << PAGE_CACHE_SHIFT),
1073 (unsigned)inode->i_size);
1074 yaffs_trace(YAFFS_TRACE_OS,
1075 " -> don't care!!");
1077 zero_user_segment(page, 0, PAGE_CACHE_SIZE);
1078 set_page_writeback(page);
1080 end_page_writeback(page);
1085 if (n_bytes != PAGE_CACHE_SIZE)
1086 zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE);
1090 buffer = kmap(page);
1092 obj = yaffs_inode_to_obj(inode);
1094 yaffs_gross_lock(dev);
1096 yaffs_trace(YAFFS_TRACE_OS,
1097 "yaffs_writepage at %08x, size %08x",
1098 (unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes);
1099 yaffs_trace(YAFFS_TRACE_OS,
1100 "writepag0: obj = %05x, ino = %05x",
1101 (int)obj->variant.file_variant.file_size, (int)inode->i_size);
1103 n_written = yaffs_wr_file(obj, buffer,
1104 page->index << PAGE_CACHE_SHIFT, n_bytes, 0);
1106 yaffs_touch_super(dev);
1108 yaffs_trace(YAFFS_TRACE_OS,
1109 "writepag1: obj = %05x, ino = %05x",
1110 (int)obj->variant.file_variant.file_size, (int)inode->i_size);
1112 yaffs_gross_unlock(dev);
1115 set_page_writeback(page);
1117 end_page_writeback(page);
1120 return (n_written == n_bytes) ? 0 : -ENOSPC;
1123 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
1124 static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
1125 loff_t pos, unsigned len, unsigned flags,
1126 struct page **pagep, void **fsdata)
1128 struct page *pg = NULL;
1129 pgoff_t index = pos >> PAGE_CACHE_SHIFT;
1135 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
1136 pg = grab_cache_page_write_begin(mapping, index, flags);
1138 pg = __grab_cache_page(mapping, index);
1146 yaffs_trace(YAFFS_TRACE_OS,
1147 "start yaffs_write_begin index %d(%x) uptodate %d",
1148 (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0);
1151 space_held = yaffs_hold_space(filp);
1158 /* Update page if required */
1160 if (!Page_Uptodate(pg))
1161 ret = yaffs_readpage_nolock(filp, pg);
1166 /* Happy path return */
1167 yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok");
1172 yaffs_trace(YAFFS_TRACE_OS,
1173 "end yaffs_write_begin fail returning %d", ret);
1175 yaffs_release_space(filp);
1178 page_cache_release(pg);
1185 static int yaffs_prepare_write(struct file *f, struct page *pg,
1186 unsigned offset, unsigned to)
1188 yaffs_trace(YAFFS_TRACE_OS, "yaffs_prepair_write");
1190 if (!Page_Uptodate(pg))
1191 return yaffs_readpage_nolock(f, pg);
1196 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
1197 static int yaffs_write_end(struct file *filp, struct address_space *mapping,
1198 loff_t pos, unsigned len, unsigned copied,
1199 struct page *pg, void *fsdadata)
1203 uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
1206 addr = kva + offset_into_page;
1208 yaffs_trace(YAFFS_TRACE_OS,
1209 "yaffs_write_end addr %p pos %x n_bytes %d",
1210 addr, (unsigned)pos, copied);
1212 ret = yaffs_file_write(filp, addr, copied, &pos);
1214 if (ret != copied) {
1215 yaffs_trace(YAFFS_TRACE_OS,
1216 "yaffs_write_end not same size ret %d copied %d",
1223 yaffs_release_space(filp);
1225 page_cache_release(pg);
1230 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
1235 loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
1236 int n_bytes = to - offset;
1239 unsigned spos = pos;
1243 addr = kva + offset;
1245 saddr = (unsigned)addr;
1247 yaffs_trace(YAFFS_TRACE_OS,
1248 "yaffs_commit_write addr %x pos %x n_bytes %d",
1249 saddr, spos, n_bytes);
1251 n_written = yaffs_file_write(f, addr, n_bytes, &pos);
1253 if (n_written != n_bytes) {
1254 yaffs_trace(YAFFS_TRACE_OS,
1255 "yaffs_commit_write not same size n_written %d n_bytes %d",
1256 n_written, n_bytes);
1261 yaffs_trace(YAFFS_TRACE_OS,
1262 "yaffs_commit_write returning %d",
1263 n_written == n_bytes ? 0 : n_written);
1265 return n_written == n_bytes ? 0 : n_written;
1269 static void yaffs_fill_inode_from_obj(struct inode *inode,
1270 struct yaffs_obj *obj)
1274 /* Check mode against the variant type and attempt to repair if broken. */
1275 u32 mode = obj->yst_mode;
1276 switch (obj->variant_type) {
1277 case YAFFS_OBJECT_TYPE_FILE:
1278 if (!S_ISREG(mode)) {
1279 obj->yst_mode &= ~S_IFMT;
1280 obj->yst_mode |= S_IFREG;
1284 case YAFFS_OBJECT_TYPE_SYMLINK:
1285 if (!S_ISLNK(mode)) {
1286 obj->yst_mode &= ~S_IFMT;
1287 obj->yst_mode |= S_IFLNK;
1291 case YAFFS_OBJECT_TYPE_DIRECTORY:
1292 if (!S_ISDIR(mode)) {
1293 obj->yst_mode &= ~S_IFMT;
1294 obj->yst_mode |= S_IFDIR;
1298 case YAFFS_OBJECT_TYPE_UNKNOWN:
1299 case YAFFS_OBJECT_TYPE_HARDLINK:
1300 case YAFFS_OBJECT_TYPE_SPECIAL:
1306 inode->i_flags |= S_NOATIME;
1308 inode->i_ino = obj->obj_id;
1309 inode->i_mode = obj->yst_mode;
1310 inode->i_uid = obj->yst_uid;
1311 inode->i_gid = obj->yst_gid;
1312 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
1313 inode->i_blksize = inode->i_sb->s_blocksize;
1315 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1317 inode->i_rdev = old_decode_dev(obj->yst_rdev);
1318 inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
1319 inode->i_atime.tv_nsec = 0;
1320 inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
1321 inode->i_mtime.tv_nsec = 0;
1322 inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
1323 inode->i_ctime.tv_nsec = 0;
1325 inode->i_rdev = obj->yst_rdev;
1326 inode->i_atime = obj->yst_atime;
1327 inode->i_mtime = obj->yst_mtime;
1328 inode->i_ctime = obj->yst_ctime;
1330 inode->i_size = yaffs_get_obj_length(obj);
1331 inode->i_blocks = (inode->i_size + 511) >> 9;
1333 inode->i_nlink = yaffs_get_obj_link_count(obj);
1335 yaffs_trace(YAFFS_TRACE_OS,
1336 "yaffs_fill_inode mode %x uid %d gid %d size %d count %d",
1337 inode->i_mode, inode->i_uid, inode->i_gid,
1338 (int)inode->i_size, atomic_read(&inode->i_count));
1340 switch (obj->yst_mode & S_IFMT) {
1341 default: /* fifo, device or socket */
1342 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1343 init_special_inode(inode, obj->yst_mode,
1344 old_decode_dev(obj->yst_rdev));
1346 init_special_inode(inode, obj->yst_mode,
1347 (dev_t) (obj->yst_rdev));
1350 case S_IFREG: /* file */
1351 inode->i_op = &yaffs_file_inode_operations;
1352 inode->i_fop = &yaffs_file_operations;
1353 inode->i_mapping->a_ops =
1354 &yaffs_file_address_operations;
1356 case S_IFDIR: /* directory */
1357 inode->i_op = &yaffs_dir_inode_operations;
1358 inode->i_fop = &yaffs_dir_operations;
1360 case S_IFLNK: /* symlink */
1361 inode->i_op = &yaffs_symlink_inode_operations;
1365 yaffs_inode_to_obj_lv(inode) = obj;
1367 obj->my_inode = inode;
1370 yaffs_trace(YAFFS_TRACE_OS,
1371 "yaffs_fill_inode invalid parameters");
1376 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
1377 struct yaffs_obj *obj)
1379 struct inode *inode;
1382 yaffs_trace(YAFFS_TRACE_OS,
1383 "yaffs_get_inode for NULL super_block!!");
1389 yaffs_trace(YAFFS_TRACE_OS,
1390 "yaffs_get_inode for NULL object!!");
1395 yaffs_trace(YAFFS_TRACE_OS,
1396 "yaffs_get_inode for object %d", obj->obj_id);
1398 inode = Y_IGET(sb, obj->obj_id);
1402 /* NB Side effect: iget calls back to yaffs_read_inode(). */
1403 /* iget also increments the inode's i_count */
1404 /* NB You can't be holding gross_lock or deadlock will happen! */
1409 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
1412 struct yaffs_obj *obj;
1413 int n_written, ipos;
1414 struct inode *inode;
1415 struct yaffs_dev *dev;
1417 obj = yaffs_dentry_to_obj(f->f_dentry);
1420 yaffs_trace(YAFFS_TRACE_OS,
1421 "yaffs_file_write: hey obj is null!");
1427 yaffs_gross_lock(dev);
1429 inode = f->f_dentry->d_inode;
1431 if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
1432 ipos = inode->i_size;
1436 yaffs_trace(YAFFS_TRACE_OS,
1437 "yaffs_file_write about to write writing %u(%x) bytes to object %d at %d(%x)",
1438 (unsigned)n, (unsigned)n, obj->obj_id, ipos, ipos);
1440 n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
1442 yaffs_touch_super(dev);
1444 yaffs_trace(YAFFS_TRACE_OS,
1445 "yaffs_file_write: %d(%x) bytes written",
1446 (unsigned)n, (unsigned)n);
1448 if (n_written > 0) {
1451 if (ipos > inode->i_size) {
1452 inode->i_size = ipos;
1453 inode->i_blocks = (ipos + 511) >> 9;
1455 yaffs_trace(YAFFS_TRACE_OS,
1456 "yaffs_file_write size updated to %d bytes, %d blocks",
1457 ipos, (int)(inode->i_blocks));
1461 yaffs_gross_unlock(dev);
1462 return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
1465 /* Space holding and freeing is done to ensure we have space available for write_begin/end */
1466 /* For now we just assume few parallel writes and check against a small number. */
1467 /* Todo: need to do this with a counter to handle parallel reads better */
1469 static ssize_t yaffs_hold_space(struct file *f)
1471 struct yaffs_obj *obj;
1472 struct yaffs_dev *dev;
1476 obj = yaffs_dentry_to_obj(f->f_dentry);
1480 yaffs_gross_lock(dev);
1482 n_free_chunks = yaffs_get_n_free_chunks(dev);
1484 yaffs_gross_unlock(dev);
1486 return (n_free_chunks > 20) ? 1 : 0;
1489 static void yaffs_release_space(struct file *f)
1491 struct yaffs_obj *obj;
1492 struct yaffs_dev *dev;
1494 obj = yaffs_dentry_to_obj(f->f_dentry);
1498 yaffs_gross_lock(dev);
1500 yaffs_gross_unlock(dev);
1503 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
1505 struct yaffs_obj *obj;
1506 struct yaffs_dev *dev;
1507 struct yaffs_search_context *sc;
1508 struct inode *inode = f->f_dentry->d_inode;
1509 unsigned long offset, curoffs;
1510 struct yaffs_obj *l;
1513 char name[YAFFS_MAX_NAME_LENGTH + 1];
1515 obj = yaffs_dentry_to_obj(f->f_dentry);
1518 yaffs_gross_lock(dev);
1520 yaffs_dev_to_lc(dev)->readdir_process = current;
1524 sc = yaffs_new_search(obj);
1530 yaffs_trace(YAFFS_TRACE_OS,
1531 "yaffs_readdir: starting at %d", (int)offset);
1534 yaffs_trace(YAFFS_TRACE_OS,
1535 "yaffs_readdir: entry . ino %d",
1537 yaffs_gross_unlock(dev);
1538 if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
1539 yaffs_gross_lock(dev);
1542 yaffs_gross_lock(dev);
1547 yaffs_trace(YAFFS_TRACE_OS,
1548 "yaffs_readdir: entry .. ino %d",
1549 (int)f->f_dentry->d_parent->d_inode->i_ino);
1550 yaffs_gross_unlock(dev);
1551 if (filldir(dirent, "..", 2, offset,
1552 f->f_dentry->d_parent->d_inode->i_ino,
1554 yaffs_gross_lock(dev);
1557 yaffs_gross_lock(dev);
1564 /* If the directory has changed since the open or last call to
1565 readdir, rewind to after the 2 canned entries. */
1566 if (f->f_version != inode->i_version) {
1569 f->f_version = inode->i_version;
1572 while (sc->next_return) {
1574 l = sc->next_return;
1575 if (curoffs >= offset) {
1576 int this_inode = yaffs_get_obj_inode(l);
1577 int this_type = yaffs_get_obj_type(l);
1579 yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
1580 yaffs_trace(YAFFS_TRACE_OS,
1581 "yaffs_readdir: %s inode %d",
1582 name, yaffs_get_obj_inode(l));
1584 yaffs_gross_unlock(dev);
1589 offset, this_inode, this_type) < 0) {
1590 yaffs_gross_lock(dev);
1594 yaffs_gross_lock(dev);
1599 yaffs_search_advance(sc);
1603 yaffs_search_end(sc);
1604 yaffs_dev_to_lc(dev)->readdir_process = NULL;
1605 yaffs_gross_unlock(dev);
1611 * File creation. Allocate an inode, and we're done..
1614 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
1617 #define YCRED(x) (x->cred)
1620 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1621 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1624 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1628 struct inode *inode;
1630 struct yaffs_obj *obj = NULL;
1631 struct yaffs_dev *dev;
1633 struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
1635 int error = -ENOSPC;
1636 uid_t uid = YCRED(current)->fsuid;
1638 (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
1640 if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
1644 yaffs_trace(YAFFS_TRACE_OS,
1645 "yaffs_mknod: parent object %d type %d",
1646 parent->obj_id, parent->variant_type);
1648 yaffs_trace(YAFFS_TRACE_OS,
1649 "yaffs_mknod: could not get parent object");
1653 yaffs_trace(YAFFS_TRACE_OS,
1654 "yaffs_mknod: making oject for %s, mode %x dev %x",
1655 dentry->d_name.name, mode, rdev);
1657 dev = parent->my_dev;
1659 yaffs_gross_lock(dev);
1661 switch (mode & S_IFMT) {
1663 /* Special (socket, fifo, device...) */
1664 yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special");
1665 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1667 yaffs_create_special(parent, dentry->d_name.name, mode, uid,
1668 gid, old_encode_dev(rdev));
1671 yaffs_create_special(parent, dentry->d_name.name, mode, uid,
1675 case S_IFREG: /* file */
1676 yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file");
1677 obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
1680 case S_IFDIR: /* directory */
1681 yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory");
1682 obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
1685 case S_IFLNK: /* symlink */
1686 yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink");
1687 obj = NULL; /* Do we ever get here? */
1691 /* Can not call yaffs_get_inode() with gross lock held */
1692 yaffs_gross_unlock(dev);
1695 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
1696 d_instantiate(dentry, inode);
1697 update_dir_time(dir);
1698 yaffs_trace(YAFFS_TRACE_OS,
1699 "yaffs_mknod created object %d count = %d",
1700 obj->obj_id, atomic_read(&inode->i_count));
1702 yaffs_fill_inode_from_obj(dir, parent);
1704 yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object");
1711 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1714 yaffs_trace(YAFFS_TRACE_OS, "yaffs_mkdir");
1715 ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
1719 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1720 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
1721 struct nameidata *n)
1723 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
1726 yaffs_trace(YAFFS_TRACE_OS, "yaffs_create");
1727 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
1730 static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
1734 struct yaffs_dev *dev;
1735 struct yaffs_obj *obj;
1737 yaffs_trace(YAFFS_TRACE_OS, "yaffs_unlink %d:%s",
1738 (int)(dir->i_ino), dentry->d_name.name);
1739 obj = yaffs_inode_to_obj(dir);
1742 yaffs_gross_lock(dev);
1744 ret_val = yaffs_unlinker(obj, dentry->d_name.name);
1746 if (ret_val == YAFFS_OK) {
1747 dentry->d_inode->i_nlink--;
1749 yaffs_gross_unlock(dev);
1750 mark_inode_dirty(dentry->d_inode);
1751 update_dir_time(dir);
1754 yaffs_gross_unlock(dev);
1761 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
1762 struct dentry *dentry)
1764 struct inode *inode = old_dentry->d_inode;
1765 struct yaffs_obj *obj = NULL;
1766 struct yaffs_obj *link = NULL;
1767 struct yaffs_dev *dev;
1769 yaffs_trace(YAFFS_TRACE_OS, "yaffs_link");
1771 obj = yaffs_inode_to_obj(inode);
1774 yaffs_gross_lock(dev);
1776 if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
1778 yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
1782 old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj);
1783 d_instantiate(dentry, old_dentry->d_inode);
1784 atomic_inc(&old_dentry->d_inode->i_count);
1785 yaffs_trace(YAFFS_TRACE_OS,
1786 "yaffs_link link count %d i_count %d",
1787 old_dentry->d_inode->i_nlink,
1788 atomic_read(&old_dentry->d_inode->i_count));
1791 yaffs_gross_unlock(dev);
1794 update_dir_time(dir);
1801 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
1802 const char *symname)
1804 struct yaffs_obj *obj;
1805 struct yaffs_dev *dev;
1806 uid_t uid = YCRED(current)->fsuid;
1808 (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
1810 yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
1812 dev = yaffs_inode_to_obj(dir)->my_dev;
1813 yaffs_gross_lock(dev);
1814 obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
1815 S_IFLNK | S_IRWXUGO, uid, gid, symname);
1816 yaffs_gross_unlock(dev);
1819 struct inode *inode;
1821 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1822 d_instantiate(dentry, inode);
1823 update_dir_time(dir);
1824 yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
1827 yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
1833 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
1834 static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync)
1835 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
1836 static int yaffs_sync_object(struct file *file, int datasync)
1838 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
1843 struct yaffs_obj *obj;
1844 struct yaffs_dev *dev;
1845 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
1846 struct dentry *dentry = file->f_path.dentry;
1849 obj = yaffs_dentry_to_obj(dentry);
1853 yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
1854 "yaffs_sync_object");
1855 yaffs_gross_lock(dev);
1856 yaffs_flush_file(obj, 1, datasync);
1857 yaffs_gross_unlock(dev);
1862 * The VFS layer already does all the dentry stuff for rename.
1864 * NB: POSIX says you can rename an object over an old object of the same name
1866 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
1867 struct inode *new_dir, struct dentry *new_dentry)
1869 struct yaffs_dev *dev;
1870 int ret_val = YAFFS_FAIL;
1871 struct yaffs_obj *target;
1873 yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
1874 dev = yaffs_inode_to_obj(old_dir)->my_dev;
1876 yaffs_gross_lock(dev);
1878 /* Check if the target is an existing directory that is not empty. */
1879 target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
1880 new_dentry->d_name.name);
1882 if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
1883 !list_empty(&target->variant.dir_variant.children)) {
1885 yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
1887 ret_val = YAFFS_FAIL;
1889 /* Now does unlinking internally using shadowing mechanism */
1890 yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
1892 ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
1893 old_dentry->d_name.name,
1894 yaffs_inode_to_obj(new_dir),
1895 new_dentry->d_name.name);
1897 yaffs_gross_unlock(dev);
1899 if (ret_val == YAFFS_OK) {
1901 new_dentry->d_inode->i_nlink--;
1902 mark_inode_dirty(new_dentry->d_inode);
1905 update_dir_time(old_dir);
1906 if (old_dir != new_dir)
1907 update_dir_time(new_dir);
1914 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1916 struct inode *inode = dentry->d_inode;
1918 struct yaffs_dev *dev;
1920 yaffs_trace(YAFFS_TRACE_OS,
1921 "yaffs_setattr of object %d",
1922 yaffs_inode_to_obj(inode)->obj_id);
1924 /* Fail if a requested resize >= 2GB */
1925 if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
1929 error = inode_change_ok(inode, attr);
1933 error = yaffs_vfs_setattr(inode, attr);
1934 yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
1935 if (attr->ia_valid & ATTR_SIZE) {
1936 yaffs_vfs_setsize(inode, attr->ia_size);
1937 inode->i_blocks = (inode->i_size + 511) >> 9;
1940 dev = yaffs_inode_to_obj(inode)->my_dev;
1941 if (attr->ia_valid & ATTR_SIZE) {
1942 yaffs_trace(YAFFS_TRACE_OS,
1944 (int)(attr->ia_size),
1945 (int)(attr->ia_size));
1947 yaffs_gross_lock(dev);
1948 result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
1949 if (result == YAFFS_OK) {
1954 yaffs_gross_unlock(dev);
1958 yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
1963 static int yaffs_setxattr(struct dentry *dentry, const char *name,
1964 const void *value, size_t size, int flags)
1966 struct inode *inode = dentry->d_inode;
1968 struct yaffs_dev *dev;
1969 struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
1971 yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
1976 yaffs_gross_lock(dev);
1977 result = yaffs_set_xattrib(obj, name, value, size, flags);
1978 if (result == YAFFS_OK)
1980 else if (result < 0)
1982 yaffs_gross_unlock(dev);
1985 yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
1990 static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name,
1991 void *buff, size_t size)
1993 struct inode *inode = dentry->d_inode;
1995 struct yaffs_dev *dev;
1996 struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
1998 yaffs_trace(YAFFS_TRACE_OS,
1999 "yaffs_getxattr \"%s\" from object %d",
2004 yaffs_gross_lock(dev);
2005 error = yaffs_get_xattrib(obj, name, buff, size);
2006 yaffs_gross_unlock(dev);
2009 yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
2014 static int yaffs_removexattr(struct dentry *dentry, const char *name)
2016 struct inode *inode = dentry->d_inode;
2018 struct yaffs_dev *dev;
2019 struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
2021 yaffs_trace(YAFFS_TRACE_OS,
2022 "yaffs_removexattr of object %d", obj->obj_id);
2027 yaffs_gross_lock(dev);
2028 result = yaffs_remove_xattrib(obj, name);
2029 if (result == YAFFS_OK)
2031 else if (result < 0)
2033 yaffs_gross_unlock(dev);
2036 yaffs_trace(YAFFS_TRACE_OS,
2037 "yaffs_removexattr done returning %d", error);
2042 static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
2044 struct inode *inode = dentry->d_inode;
2046 struct yaffs_dev *dev;
2047 struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
2049 yaffs_trace(YAFFS_TRACE_OS,
2050 "yaffs_listxattr of object %d", obj->obj_id);
2054 yaffs_gross_lock(dev);
2055 error = yaffs_list_xattrib(obj, buff, size);
2056 yaffs_gross_unlock(dev);
2059 yaffs_trace(YAFFS_TRACE_OS,
2060 "yaffs_listxattr done returning %d", error);
2066 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2067 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
2069 struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
2070 struct super_block *sb = dentry->d_sb;
2071 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2072 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
2074 struct yaffs_dev *dev = yaffs_super_to_dev(sb);
2076 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
2078 struct yaffs_dev *dev = yaffs_super_to_dev(sb);
2081 yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs");
2083 yaffs_gross_lock(dev);
2085 buf->f_type = YAFFS_MAGIC;
2086 buf->f_bsize = sb->s_blocksize;
2087 buf->f_namelen = 255;
2089 if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) {
2090 /* Do this if chunk size is not a power of 2 */
2092 uint64_t bytes_in_dev;
2093 uint64_t bytes_free;
2097 ((dev->param.end_block - dev->param.start_block +
2098 1))) * ((uint64_t) (dev->param.chunks_per_block *
2099 dev->data_bytes_per_chunk));
2101 do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */
2102 buf->f_blocks = bytes_in_dev;
2104 bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) *
2105 ((uint64_t) (dev->data_bytes_per_chunk));
2107 do_div(bytes_free, sb->s_blocksize);
2109 buf->f_bfree = bytes_free;
2111 } else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
2114 (dev->param.end_block - dev->param.start_block + 1) *
2115 dev->param.chunks_per_block /
2116 (sb->s_blocksize / dev->data_bytes_per_chunk);
2118 yaffs_get_n_free_chunks(dev) /
2119 (sb->s_blocksize / dev->data_bytes_per_chunk);
2122 (dev->param.end_block - dev->param.start_block + 1) *
2123 dev->param.chunks_per_block *
2124 (dev->data_bytes_per_chunk / sb->s_blocksize);
2127 yaffs_get_n_free_chunks(dev) *
2128 (dev->data_bytes_per_chunk / sb->s_blocksize);
2133 buf->f_bavail = buf->f_bfree;
2135 yaffs_gross_unlock(dev);
2139 static void yaffs_flush_inodes(struct super_block *sb)
2142 struct yaffs_obj *obj;
2144 list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {
2145 obj = yaffs_inode_to_obj(iptr);
2147 yaffs_trace(YAFFS_TRACE_OS,
2150 yaffs_flush_file(obj, 1, 0);
2155 static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
2157 struct yaffs_dev *dev = yaffs_super_to_dev(sb);
2161 yaffs_flush_inodes(sb);
2162 yaffs_update_dirty_dirs(dev);
2163 yaffs_flush_whole_cache(dev);
2165 yaffs_checkpoint_save(dev);
2168 static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev)
2170 unsigned erased_chunks =
2171 dev->n_erased_blocks * dev->param.chunks_per_block;
2172 struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
2173 unsigned scattered = 0; /* Free chunks not in an erased block */
2175 if (erased_chunks < dev->n_free_chunks)
2176 scattered = (dev->n_free_chunks - erased_chunks);
2178 if (!context->bg_running)
2180 else if (scattered < (dev->param.chunks_per_block * 2))
2182 else if (erased_chunks > dev->n_free_chunks / 2)
2184 else if (erased_chunks > dev->n_free_chunks / 4)
2190 static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
2193 struct yaffs_dev *dev = yaffs_super_to_dev(sb);
2194 unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
2195 unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
2198 yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
2199 "yaffs_do_sync_fs: gc-urgency %d %s %s%s",
2201 sb->s_dirt ? "dirty" : "clean",
2202 request_checkpoint ? "checkpoint requested" : "no checkpoint",
2203 oneshot_checkpoint ? " one-shot" : "");
2205 yaffs_gross_lock(dev);
2206 do_checkpoint = ((request_checkpoint && !gc_urgent) ||
2207 oneshot_checkpoint) && !dev->is_checkpointed;
2209 if (sb->s_dirt || do_checkpoint) {
2210 yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
2212 if (oneshot_checkpoint)
2213 yaffs_auto_checkpoint &= ~4;
2215 yaffs_gross_unlock(dev);
2221 * yaffs background thread functions .
2222 * yaffs_bg_thread_fn() the thread function
2223 * yaffs_bg_start() launches the background thread.
2224 * yaffs_bg_stop() cleans up the background thread.
2227 * The thread should only run after the yaffs is initialised
2228 * The thread should be stopped before yaffs is unmounted.
2229 * The thread should not do any writing while the fs is in read only.
2232 #ifdef YAFFS_COMPILE_BACKGROUND
2234 void yaffs_background_waker(unsigned long data)
2236 wake_up_process((struct task_struct *)data);
2239 static int yaffs_bg_thread_fn(void *data)
2241 struct yaffs_dev *dev = (struct yaffs_dev *)data;
2242 struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
2243 unsigned long now = jiffies;
2244 unsigned long next_dir_update = now;
2245 unsigned long next_gc = now;
2246 unsigned long expires;
2247 unsigned int urgency;
2250 struct timer_list timer;
2252 yaffs_trace(YAFFS_TRACE_BACKGROUND,
2253 "yaffs_background starting for dev %p", (void *)dev);
2255 #ifdef YAFFS_COMPILE_FREEZER
2258 while (context->bg_running) {
2259 yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
2261 if (kthread_should_stop())
2264 #ifdef YAFFS_COMPILE_FREEZER
2265 if (try_to_freeze())
2268 yaffs_gross_lock(dev);
2272 if (time_after(now, next_dir_update) && yaffs_bg_enable) {
2273 yaffs_update_dirty_dirs(dev);
2274 next_dir_update = now + HZ;
2277 if (time_after(now, next_gc) && yaffs_bg_enable) {
2278 if (!dev->is_checkpointed) {
2279 urgency = yaffs_bg_gc_urgency(dev);
2280 gc_result = yaffs_bg_gc(dev, urgency);
2282 next_gc = now + HZ / 20 + 1;
2283 else if (urgency > 0)
2284 next_gc = now + HZ / 10 + 1;
2286 next_gc = now + HZ * 2;
2289 * gc not running so set to next_dir_update
2290 * to cut down on wake ups
2292 next_gc = next_dir_update;
2295 yaffs_gross_unlock(dev);
2297 expires = next_dir_update;
2298 if (time_before(next_gc, expires))
2300 if (time_before(expires, now))
2303 Y_INIT_TIMER(&timer);
2304 timer.expires = expires + 1;
2305 timer.data = (unsigned long)current;
2306 timer.function = yaffs_background_waker;
2308 set_current_state(TASK_INTERRUPTIBLE);
2311 del_timer_sync(&timer);
2320 static int yaffs_bg_start(struct yaffs_dev *dev)
2323 struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
2328 context->bg_running = 1;
2330 context->bg_thread = kthread_run(yaffs_bg_thread_fn,
2331 (void *)dev, "yaffs-bg-%d",
2334 if (IS_ERR(context->bg_thread)) {
2335 retval = PTR_ERR(context->bg_thread);
2336 context->bg_thread = NULL;
2337 context->bg_running = 0;
2342 static void yaffs_bg_stop(struct yaffs_dev *dev)
2344 struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev);
2346 ctxt->bg_running = 0;
2348 if (ctxt->bg_thread) {
2349 kthread_stop(ctxt->bg_thread);
2350 ctxt->bg_thread = NULL;
2354 static int yaffs_bg_thread_fn(void *data)
2359 static int yaffs_bg_start(struct yaffs_dev *dev)
2364 static void yaffs_bg_stop(struct yaffs_dev *dev)
2369 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2370 static void yaffs_write_super(struct super_block *sb)
2372 static int yaffs_write_super(struct super_block *sb)
2375 unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
2377 yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
2378 "yaffs_write_super %s",
2379 request_checkpoint ? " checkpt" : "");
2381 yaffs_do_sync_fs(sb, request_checkpoint);
2383 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
2388 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2389 static int yaffs_sync_fs(struct super_block *sb, int wait)
2391 static int yaffs_sync_fs(struct super_block *sb)
2394 unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
2396 yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
2397 "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : "");
2399 yaffs_do_sync_fs(sb, request_checkpoint);
2404 #ifdef YAFFS_USE_OWN_IGET
2406 static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
2408 struct inode *inode;
2409 struct yaffs_obj *obj;
2410 struct yaffs_dev *dev = yaffs_super_to_dev(sb);
2412 yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
2414 inode = iget_locked(sb, ino);
2416 return ERR_PTR(-ENOMEM);
2417 if (!(inode->i_state & I_NEW))
2420 /* NB This is called as a side effect of other functions, but
2421 * we had to release the lock to prevent deadlocks, so
2422 * need to lock again.
2425 yaffs_gross_lock(dev);
2427 obj = yaffs_find_by_number(dev, inode->i_ino);
2429 yaffs_fill_inode_from_obj(inode, obj);
2431 yaffs_gross_unlock(dev);
2433 unlock_new_inode(inode);
2439 static void yaffs_read_inode(struct inode *inode)
2441 /* NB This is called as a side effect of other functions, but
2442 * we had to release the lock to prevent deadlocks, so
2443 * need to lock again.
2446 struct yaffs_obj *obj;
2447 struct yaffs_dev *dev = yaffs_super_to_dev(inode->i_sb);
2449 yaffs_trace(YAFFS_TRACE_OS,
2450 "yaffs_read_inode for %d", (int)inode->i_ino);
2452 if (current != yaffs_dev_to_lc(dev)->readdir_process)
2453 yaffs_gross_lock(dev);
2455 obj = yaffs_find_by_number(dev, inode->i_ino);
2457 yaffs_fill_inode_from_obj(inode, obj);
2459 if (current != yaffs_dev_to_lc(dev)->readdir_process)
2460 yaffs_gross_unlock(dev);
2465 static LIST_HEAD(yaffs_context_list);
2466 struct mutex yaffs_context_lock;
2468 static void yaffs_put_super(struct super_block *sb)
2470 struct yaffs_dev *dev = yaffs_super_to_dev(sb);
2472 yaffs_trace(YAFFS_TRACE_OS, "yaffs_put_super");
2474 yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
2475 "Shutting down yaffs background thread");
2477 yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
2478 "yaffs background thread shut down");
2480 yaffs_gross_lock(dev);
2482 yaffs_flush_super(sb, 1);
2484 if (yaffs_dev_to_lc(dev)->put_super_fn)
2485 yaffs_dev_to_lc(dev)->put_super_fn(sb);
2487 yaffs_deinitialise(dev);
2489 yaffs_gross_unlock(dev);
2491 mutex_lock(&yaffs_context_lock);
2492 list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
2493 mutex_unlock(&yaffs_context_lock);
2495 if (yaffs_dev_to_lc(dev)->spare_buffer) {
2496 kfree(yaffs_dev_to_lc(dev)->spare_buffer);
2497 yaffs_dev_to_lc(dev)->spare_buffer = NULL;
2503 static void yaffs_mtd_put_super(struct super_block *sb)
2505 struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_super_to_dev(sb));
2510 put_mtd_device(mtd);
2513 static void yaffs_touch_super(struct yaffs_dev *dev)
2515 struct super_block *sb = yaffs_dev_to_lc(dev)->super;
2517 yaffs_trace(YAFFS_TRACE_OS, "yaffs_touch_super() sb = %p", sb);
2522 struct yaffs_options {
2524 int skip_checkpoint_read;
2525 int skip_checkpoint_write;
2528 int tags_ecc_overridden;
2529 int lazy_loading_enabled;
2530 int lazy_loading_overridden;
2531 int empty_lost_and_found;
2532 int empty_lost_and_found_overridden;
2533 int disable_summary;
2536 #define MAX_OPT_LEN 30
2537 static int yaffs_parse_options(struct yaffs_options *options,
2538 const char *options_str)
2540 char cur_opt[MAX_OPT_LEN + 1];
2544 /* Parse through the options which is a comma seperated list */
2546 while (options_str && *options_str && !error) {
2547 memset(cur_opt, 0, MAX_OPT_LEN + 1);
2550 while (*options_str == ',')
2553 while (*options_str && *options_str != ',') {
2554 if (p < MAX_OPT_LEN) {
2555 cur_opt[p] = *options_str;
2561 if (!strcmp(cur_opt, "inband-tags")) {
2562 options->inband_tags = 1;
2563 } else if (!strcmp(cur_opt, "tags-ecc-off")) {
2564 options->tags_ecc_on = 0;
2565 options->tags_ecc_overridden = 1;
2566 } else if (!strcmp(cur_opt, "tags-ecc-on")) {
2567 options->tags_ecc_on = 1;
2568 options->tags_ecc_overridden = 1;
2569 } else if (!strcmp(cur_opt, "lazy-loading-off")) {
2570 options->lazy_loading_enabled = 0;
2571 options->lazy_loading_overridden = 1;
2572 } else if (!strcmp(cur_opt, "lazy-loading-on")) {
2573 options->lazy_loading_enabled = 1;
2574 options->lazy_loading_overridden = 1;
2575 } else if (!strcmp(cur_opt, "disable-summary")) {
2576 options->disable_summary = 1;
2577 } else if (!strcmp(cur_opt, "empty-lost-and-found-off")) {
2578 options->empty_lost_and_found = 0;
2579 options->empty_lost_and_found_overridden = 1;
2580 } else if (!strcmp(cur_opt, "empty-lost-and-found-on")) {
2581 options->empty_lost_and_found = 1;
2582 options->empty_lost_and_found_overridden = 1;
2583 } else if (!strcmp(cur_opt, "no-cache")) {
2584 options->no_cache = 1;
2585 } else if (!strcmp(cur_opt, "no-checkpoint-read")) {
2586 options->skip_checkpoint_read = 1;
2587 } else if (!strcmp(cur_opt, "no-checkpoint-write")) {
2588 options->skip_checkpoint_write = 1;
2589 } else if (!strcmp(cur_opt, "no-checkpoint")) {
2590 options->skip_checkpoint_read = 1;
2591 options->skip_checkpoint_write = 1;
2593 printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
2602 static struct super_block *yaffs_internal_read_super(int yaffs_version,
2603 struct super_block *sb,
2604 void *data, int silent)
2607 struct inode *inode = NULL;
2608 struct dentry *root;
2609 struct yaffs_dev *dev = 0;
2610 char devname_buf[BDEVNAME_SIZE + 1];
2611 struct mtd_info *mtd;
2613 char *data_str = (char *)data;
2614 struct yaffs_linux_context *context = NULL;
2615 struct yaffs_param *param;
2619 struct yaffs_options options;
2623 struct yaffs_linux_context *context_iterator;
2624 struct list_head *l;
2627 printk(KERN_INFO "yaffs: sb is NULL\n");
2631 sb->s_magic = YAFFS_MAGIC;
2632 sb->s_op = &yaffs_super_ops;
2633 sb->s_flags |= MS_NOATIME;
2635 read_only = ((sb->s_flags & MS_RDONLY) != 0);
2637 #ifdef YAFFS_COMPILE_EXPORTFS
2638 sb->s_export_op = &yaffs_export_ops;
2642 printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
2643 else if (!yaffs_devname(sb, devname_buf))
2644 printk(KERN_INFO "yaffs: devname is NULL\n");
2646 printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n",
2648 yaffs_devname(sb, devname_buf), read_only ? "ro" : "rw");
2653 printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
2655 memset(&options, 0, sizeof(options));
2657 if (yaffs_parse_options(&options, data_str)) {
2658 /* Option parsing failed */
2662 sb->s_blocksize = PAGE_CACHE_SIZE;
2663 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
2665 yaffs_trace(YAFFS_TRACE_OS,
2666 "yaffs_read_super: Using yaffs%d", yaffs_version);
2667 yaffs_trace(YAFFS_TRACE_OS,
2668 "yaffs_read_super: block size %d", (int)(sb->s_blocksize));
2670 yaffs_trace(YAFFS_TRACE_ALWAYS,
2671 "yaffs: Attempting MTD mount of %u.%u,\"%s\"",
2672 MAJOR(sb->s_dev), MINOR(sb->s_dev),
2673 yaffs_devname(sb, devname_buf));
2675 /* Check it's an mtd device..... */
2676 if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
2677 return NULL; /* This isn't an mtd device */
2679 /* Get the device */
2680 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
2682 yaffs_trace(YAFFS_TRACE_ALWAYS,
2683 "yaffs: MTD device #%u doesn't appear to exist",
2687 /* Check it's NAND */
2688 if (mtd->type != MTD_NANDFLASH) {
2689 yaffs_trace(YAFFS_TRACE_ALWAYS,
2690 "yaffs: MTD device is not NAND it's type %d",
2695 yaffs_trace(YAFFS_TRACE_OS, " erase %p", mtd->erase);
2696 yaffs_trace(YAFFS_TRACE_OS, " read %p", mtd->read);
2697 yaffs_trace(YAFFS_TRACE_OS, " write %p", mtd->write);
2698 yaffs_trace(YAFFS_TRACE_OS, " readoob %p", mtd->read_oob);
2699 yaffs_trace(YAFFS_TRACE_OS, " writeoob %p", mtd->write_oob);
2700 yaffs_trace(YAFFS_TRACE_OS, " block_isbad %p", mtd->block_isbad);
2701 yaffs_trace(YAFFS_TRACE_OS, " block_markbad %p", mtd->block_markbad);
2702 yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd));
2703 yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
2704 yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
2705 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
2706 yaffs_trace(YAFFS_TRACE_OS, " size %u", mtd->size);
2708 yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
2711 if (yaffs_auto_select && yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
2712 yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2");
2716 /* Added NCB 26/5/2006 for completeness */
2717 if (yaffs_version == 2 && !options.inband_tags
2718 && WRITE_SIZE(mtd) == 512) {
2719 yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1");
2723 if (yaffs_version == 2) {
2724 /* Check for version 2 style functions */
2726 !mtd->block_isbad ||
2727 !mtd->block_markbad || !mtd->read || !mtd->write ||
2728 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2729 !mtd->read_oob || !mtd->write_oob) {
2732 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
2734 yaffs_trace(YAFFS_TRACE_ALWAYS,
2735 "MTD device does not support required functions"
2740 if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
2741 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
2742 !options.inband_tags) {
2743 yaffs_trace(YAFFS_TRACE_ALWAYS,
2744 "MTD device does not have the right page sizes"
2749 /* Check for V1 style functions */
2750 if (!mtd->erase || !mtd->read || !mtd->write ||
2751 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2752 !mtd->read_oob || !mtd->write_oob) {
2755 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
2757 yaffs_trace(YAFFS_TRACE_ALWAYS,
2758 "MTD device does not support required functions"
2763 if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
2764 mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
2765 yaffs_trace(YAFFS_TRACE_ALWAYS,
2766 "MTD device does not support have the right page sizes"
2772 /* OK, so if we got here, we have an MTD that's NAND and looks
2773 * like it has the right capabilities
2774 * Set the struct yaffs_dev up for mtd
2777 if (!read_only && !(mtd->flags & MTD_WRITEABLE)) {
2780 "yaffs: mtd is read only, setting superblock read only\n"
2782 sb->s_flags |= MS_RDONLY;
2785 dev = kmalloc(sizeof(struct yaffs_dev), GFP_KERNEL);
2786 context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL);
2788 if (!dev || !context) {
2798 /* Deep shit could not allocate device structure */
2799 yaffs_trace(YAFFS_TRACE_ALWAYS,
2800 "yaffs_read_super: Failed trying to allocate struct yaffs_dev."
2804 memset(dev, 0, sizeof(struct yaffs_dev));
2805 param = &(dev->param);
2807 memset(context, 0, sizeof(struct yaffs_linux_context));
2808 dev->os_context = context;
2809 INIT_LIST_HEAD(&(context->context_list));
2811 context->super = sb;
2813 dev->read_only = read_only;
2815 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2816 sb->s_fs_info = dev;
2818 sb->u.generic_sbp = dev;
2821 dev->driver_context = mtd;
2822 param->name = mtd->name;
2824 /* Set up the memory size parameters.... */
2827 YCALCBLOCKS(mtd->size,
2828 (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
2830 param->start_block = 0;
2831 param->end_block = n_blocks - 1;
2832 param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK;
2833 param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK;
2834 param->n_reserved_blocks = 5;
2835 param->n_caches = (options.no_cache) ? 0 : 10;
2836 param->inband_tags = options.inband_tags;
2838 param->enable_xattr = 1;
2839 if (options.lazy_loading_overridden)
2840 param->disable_lazy_load = !options.lazy_loading_enabled;
2842 param->defered_dir_update = 1;
2844 if (options.tags_ecc_overridden)
2845 param->no_tags_ecc = !options.tags_ecc_on;
2847 param->empty_lost_n_found = 1;
2848 param->refresh_period = 500;
2849 param->disable_summary = options.disable_summary;
2851 if (options.empty_lost_and_found_overridden)
2852 param->empty_lost_n_found = options.empty_lost_and_found;
2854 /* ... and the functions. */
2855 if (yaffs_version == 2) {
2856 param->write_chunk_tags_fn = nandmtd2_write_chunk_tags;
2857 param->read_chunk_tags_fn = nandmtd2_read_chunk_tags;
2858 param->bad_block_fn = nandmtd2_mark_block_bad;
2859 param->query_block_fn = nandmtd2_query_block;
2860 yaffs_dev_to_lc(dev)->spare_buffer =
2861 kmalloc(mtd->oobsize, GFP_NOFS);
2862 param->is_yaffs2 = 1;
2863 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2864 param->total_bytes_per_chunk = mtd->writesize;
2865 param->chunks_per_block = mtd->erasesize / mtd->writesize;
2867 param->total_bytes_per_chunk = mtd->oobblock;
2868 param->chunks_per_block = mtd->erasesize / mtd->oobblock;
2870 n_blocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
2872 param->start_block = 0;
2873 param->end_block = n_blocks - 1;
2875 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2876 /* use the MTD interface in yaffs_mtdif1.c */
2877 param->write_chunk_tags_fn = nandmtd1_write_chunk_tags;
2878 param->read_chunk_tags_fn = nandmtd1_read_chunk_tags;
2879 param->bad_block_fn = nandmtd1_mark_block_bad;
2880 param->query_block_fn = nandmtd1_query_block;
2882 param->write_chunk_fn = nandmtd_write_chunk;
2883 param->read_chunk_fn = nandmtd_read_chunk;
2885 param->is_yaffs2 = 0;
2887 /* ... and common functions */
2888 param->erase_fn = nandmtd_erase_block;
2889 param->initialise_flash_fn = nandmtd_initialise;
2891 yaffs_dev_to_lc(dev)->put_super_fn = yaffs_mtd_put_super;
2893 param->sb_dirty_fn = yaffs_touch_super;
2894 param->gc_control = yaffs_gc_control_callback;
2896 yaffs_dev_to_lc(dev)->super = sb;
2898 param->use_nand_ecc = 1;
2900 param->skip_checkpt_rd = options.skip_checkpoint_read;
2901 param->skip_checkpt_wr = options.skip_checkpoint_write;
2903 mutex_lock(&yaffs_context_lock);
2904 /* Get a mount id */
2906 for (mount_id = 0; !found; mount_id++) {
2908 list_for_each(l, &yaffs_context_list) {
2910 list_entry(l, struct yaffs_linux_context,
2912 if (context_iterator->mount_id == mount_id)
2916 context->mount_id = mount_id;
2918 list_add_tail(&(yaffs_dev_to_lc(dev)->context_list),
2919 &yaffs_context_list);
2920 mutex_unlock(&yaffs_context_lock);
2922 /* Directory search handling... */
2923 INIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts));
2924 param->remove_obj_fn = yaffs_remove_obj_callback;
2926 mutex_init(&(yaffs_dev_to_lc(dev)->gross_lock));
2928 yaffs_gross_lock(dev);
2930 err = yaffs_guts_initialise(dev);
2932 yaffs_trace(YAFFS_TRACE_OS,
2933 "yaffs_read_super: guts initialised %s",
2934 (err == YAFFS_OK) ? "OK" : "FAILED");
2936 if (err == YAFFS_OK)
2937 yaffs_bg_start(dev);
2939 if (!context->bg_thread)
2940 param->defered_dir_update = 0;
2942 /* Release lock before yaffs_get_inode() */
2943 yaffs_gross_unlock(dev);
2945 /* Create root inode */
2946 if (err == YAFFS_OK)
2947 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, yaffs_root(dev));
2952 inode->i_op = &yaffs_dir_inode_operations;
2953 inode->i_fop = &yaffs_dir_operations;
2955 yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode");
2957 root = d_alloc_root(inode);
2959 yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: d_alloc_root done");
2966 sb->s_dirt = !dev->is_checkpointed;
2967 yaffs_trace(YAFFS_TRACE_ALWAYS,
2968 "yaffs_read_super: is_checkpointed %d",
2969 dev->is_checkpointed);
2971 yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done");
2975 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2976 static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
2979 return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
2982 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
2983 static struct dentry *yaffs_mount(struct file_system_type *fs_type, int flags,
2984 const char *dev_name, void *data)
2986 return mount_bdev(fs_type, flags, dev_name, data, yaffs_internal_read_super_mtd);
2988 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2989 static int yaffs_read_super(struct file_system_type *fs,
2990 int flags, const char *dev_name,
2991 void *data, struct vfsmount *mnt)
2994 return get_sb_bdev(fs, flags, dev_name, data,
2995 yaffs_internal_read_super_mtd, mnt);
2998 static struct super_block *yaffs_read_super(struct file_system_type *fs,
2999 int flags, const char *dev_name,
3003 return get_sb_bdev(fs, flags, dev_name, data,
3004 yaffs_internal_read_super_mtd);
3008 static struct file_system_type yaffs_fs_type = {
3009 .owner = THIS_MODULE,
3011 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
3012 .mount = yaffs_mount,
3014 .get_sb = yaffs_read_super,
3016 .kill_sb = kill_block_super,
3017 .fs_flags = FS_REQUIRES_DEV,
3020 static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
3023 return yaffs_internal_read_super(1, sb, data, silent);
3026 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
3031 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
3032 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
3035 return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
3038 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
3039 static struct dentry *yaffs2_mount(struct file_system_type *fs_type, int flags,
3040 const char *dev_name, void *data)
3042 return mount_bdev(fs_type, flags, dev_name, data, yaffs2_internal_read_super_mtd);
3044 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
3045 static int yaffs2_read_super(struct file_system_type *fs,
3046 int flags, const char *dev_name, void *data,
3047 struct vfsmount *mnt)
3049 return get_sb_bdev(fs, flags, dev_name, data,
3050 yaffs2_internal_read_super_mtd, mnt);
3053 static struct super_block *yaffs2_read_super(struct file_system_type *fs,
3054 int flags, const char *dev_name,
3058 return get_sb_bdev(fs, flags, dev_name, data,
3059 yaffs2_internal_read_super_mtd);
3063 static struct file_system_type yaffs2_fs_type = {
3064 .owner = THIS_MODULE,
3066 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
3067 .mount = yaffs2_mount,
3069 .get_sb = yaffs2_read_super,
3071 .kill_sb = kill_block_super,
3072 .fs_flags = FS_REQUIRES_DEV,
3075 static struct super_block *yaffs2_read_super(struct super_block *sb,
3076 void *data, int silent)
3078 return yaffs_internal_read_super(2, sb, data, silent);
3081 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
3086 static struct proc_dir_entry *my_proc_entry;
3088 static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev)
3090 struct yaffs_param *param = &dev->param;
3092 buf += sprintf(buf, "start_block.......... %d\n", param->start_block);
3093 buf += sprintf(buf, "end_block............ %d\n", param->end_block);
3094 buf += sprintf(buf, "total_bytes_per_chunk %d\n",
3095 param->total_bytes_per_chunk);
3096 buf += sprintf(buf, "use_nand_ecc......... %d\n", param->use_nand_ecc);
3097 buf += sprintf(buf, "no_tags_ecc.......... %d\n", param->no_tags_ecc);
3098 buf += sprintf(buf, "is_yaffs2............ %d\n", param->is_yaffs2);
3099 buf += sprintf(buf, "inband_tags.......... %d\n", param->inband_tags);
3100 buf += sprintf(buf, "empty_lost_n_found... %d\n",
3101 param->empty_lost_n_found);
3102 buf += sprintf(buf, "disable_lazy_load.... %d\n",
3103 param->disable_lazy_load);
3104 buf += sprintf(buf, "refresh_period....... %d\n",
3105 param->refresh_period);
3106 buf += sprintf(buf, "n_caches............. %d\n", param->n_caches);
3107 buf += sprintf(buf, "n_reserved_blocks.... %d\n",
3108 param->n_reserved_blocks);
3109 buf += sprintf(buf, "always_check_erased.. %d\n",
3110 param->always_check_erased);
3111 buf += sprintf(buf, "\n");
3116 static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev)
3118 buf += sprintf(buf, "data_bytes_per_chunk. %d\n",
3119 dev->data_bytes_per_chunk);
3120 buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);
3121 buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size);
3122 buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks);
3123 buf += sprintf(buf, "blocks_in_checkpt.... %d\n",
3124 dev->blocks_in_checkpt);
3125 buf += sprintf(buf, "\n");
3126 buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes);
3127 buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj);
3128 buf += sprintf(buf, "n_free_chunks........ %d\n", dev->n_free_chunks);
3129 buf += sprintf(buf, "\n");
3130 buf += sprintf(buf, "n_page_writes........ %u\n", dev->n_page_writes);
3131 buf += sprintf(buf, "n_page_reads......... %u\n", dev->n_page_reads);
3132 buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures);
3133 buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies);
3134 buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs);
3135 buf += sprintf(buf, "passive_gc_count..... %u\n",
3136 dev->passive_gc_count);
3137 buf += sprintf(buf, "oldest_dirty_gc_count %u\n",
3138 dev->oldest_dirty_gc_count);
3139 buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks);
3140 buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs);
3141 buf += sprintf(buf, "n_retried_writes..... %u\n",
3142 dev->n_retried_writes);
3143 buf += sprintf(buf, "n_retired_blocks..... %u\n",
3144 dev->n_retired_blocks);
3145 buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed);
3146 buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed);
3147 buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n",
3148 dev->n_tags_ecc_fixed);
3149 buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n",
3150 dev->n_tags_ecc_unfixed);
3151 buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits);
3152 buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files);
3153 buf += sprintf(buf, "n_unlinked_files..... %u\n",
3154 dev->n_unlinked_files);
3155 buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count);
3156 buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions);
3157 buf += sprintf(buf, "tags_used............ %u\n", dev->tags_used);
3158 buf += sprintf(buf, "summary_used......... %u\n", dev->summary_used);
3163 static int yaffs_proc_read(char *page,
3165 off_t offset, int count, int *eof, void *data)
3167 struct list_head *item;
3172 /* Get proc_file_read() to step 'offset' by one on each sucessive call.
3173 * We use 'offset' (*ppos) to indicate where we are in dev_list.
3174 * This also assumes the user has posted a read buffer large
3175 * enough to hold the complete output; but that's life in /proc.
3180 /* Print header first */
3184 "Multi-version YAFFS built:" __DATE__ " " __TIME__
3187 buf += sprintf(buf, "\n");
3191 mutex_lock(&yaffs_context_lock);
3193 /* Locate and print the Nth entry. Order N-squared but N is small. */
3194 list_for_each(item, &yaffs_context_list) {
3195 struct yaffs_linux_context *dc =
3196 list_entry(item, struct yaffs_linux_context,
3198 struct yaffs_dev *dev = dc->dev;
3200 if (n < (step & ~1)) {
3204 if ((step & 1) == 0) {
3206 sprintf(buf, "\nDevice %d \"%s\"\n", n,
3208 buf = yaffs_dump_dev_part0(buf, dev);
3210 buf = yaffs_dump_dev_part1(buf, dev);
3215 mutex_unlock(&yaffs_context_lock);
3218 return buf - page < count ? buf - page : count;
3222 * Set the verbosity of the warnings and error messages.
3224 * Note that the names can only be a..z or _ with the current code.
3229 unsigned mask_bitfield;
3231 {"allocate", YAFFS_TRACE_ALLOCATE},
3232 {"always", YAFFS_TRACE_ALWAYS},
3233 {"background", YAFFS_TRACE_BACKGROUND},
3234 {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
3235 {"buffers", YAFFS_TRACE_BUFFERS},
3236 {"bug", YAFFS_TRACE_BUG},
3237 {"checkpt", YAFFS_TRACE_CHECKPOINT},
3238 {"deletion", YAFFS_TRACE_DELETION},
3239 {"erase", YAFFS_TRACE_ERASE},
3240 {"error", YAFFS_TRACE_ERROR},
3241 {"gc_detail", YAFFS_TRACE_GC_DETAIL},
3242 {"gc", YAFFS_TRACE_GC},
3243 {"lock", YAFFS_TRACE_LOCK},
3244 {"mtd", YAFFS_TRACE_MTD},
3245 {"nandaccess", YAFFS_TRACE_NANDACCESS},
3246 {"os", YAFFS_TRACE_OS},
3247 {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
3248 {"scan", YAFFS_TRACE_SCAN},
3249 {"mount", YAFFS_TRACE_MOUNT},
3250 {"tracing", YAFFS_TRACE_TRACING},
3251 {"sync", YAFFS_TRACE_SYNC},
3252 {"write", YAFFS_TRACE_WRITE},
3253 {"verify", YAFFS_TRACE_VERIFY},
3254 {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
3255 {"verify_full", YAFFS_TRACE_VERIFY_FULL},
3256 {"verify_all", YAFFS_TRACE_VERIFY_ALL},
3257 {"all", 0xffffffff},
3262 #define MAX_MASK_NAME_LENGTH 40
3263 static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
3264 unsigned long count, void *data)
3266 unsigned rg = 0, mask_bitfield;
3270 char substring[MAX_MASK_NAME_LENGTH + 1];
3276 rg = yaffs_trace_mask;
3278 while (!done && (pos < count)) {
3280 while ((pos < count) && isspace(buf[pos]))
3297 mask_bitfield = simple_strtoul(buf + pos, &end, 0);
3299 if (end > buf + pos) {
3300 mask_name = "numeral";
3301 len = end - (buf + pos);
3305 for (x = buf + pos, i = 0;
3306 (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
3307 i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
3309 substring[i] = '\0';
3311 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
3312 if (strcmp(substring, mask_flags[i].mask_name)
3314 mask_name = mask_flags[i].mask_name;
3316 mask_flags[i].mask_bitfield;
3323 if (mask_name != NULL) {
3327 rg &= ~mask_bitfield;
3330 rg |= mask_bitfield;
3336 rg |= mask_bitfield;
3342 yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS;
3344 printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask);
3346 if (rg & YAFFS_TRACE_ALWAYS) {
3347 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
3349 flag = ((rg & mask_flags[i].mask_bitfield) ==
3350 mask_flags[i].mask_bitfield) ? '+' : '-';
3351 printk(KERN_DEBUG "%c%s\n", flag,
3352 mask_flags[i].mask_name);
3359 static int yaffs_proc_write(struct file *file, const char *buf,
3360 unsigned long count, void *data)
3362 return yaffs_proc_write_trace_options(file, buf, count, data);
3365 /* Stuff to handle installation of file systems */
3366 struct file_system_to_install {
3367 struct file_system_type *fst;
3371 static struct file_system_to_install fs_to_install[] = {
3372 {&yaffs_fs_type, 0},
3373 {&yaffs2_fs_type, 0},
3377 static int __init init_yaffs_fs(void)
3380 struct file_system_to_install *fsinst;
3382 yaffs_trace(YAFFS_TRACE_ALWAYS,
3383 "yaffs built " __DATE__ " " __TIME__ " Installing.");
3385 mutex_init(&yaffs_context_lock);
3387 /* Install the proc_fs entries */
3388 my_proc_entry = create_proc_entry("yaffs",
3389 S_IRUGO | S_IFREG, YPROC_ROOT);
3391 if (my_proc_entry) {
3392 my_proc_entry->write_proc = yaffs_proc_write;
3393 my_proc_entry->read_proc = yaffs_proc_read;
3394 my_proc_entry->data = NULL;
3399 /* Now add the file system entries */
3401 fsinst = fs_to_install;
3403 while (fsinst->fst && !error) {
3404 error = register_filesystem(fsinst->fst);
3406 fsinst->installed = 1;
3410 /* Any errors? uninstall */
3412 fsinst = fs_to_install;
3414 while (fsinst->fst) {
3415 if (fsinst->installed) {
3416 unregister_filesystem(fsinst->fst);
3417 fsinst->installed = 0;
3426 static void __exit exit_yaffs_fs(void)
3429 struct file_system_to_install *fsinst;
3431 yaffs_trace(YAFFS_TRACE_ALWAYS,
3432 "yaffs built " __DATE__ " " __TIME__ " removing.");
3434 remove_proc_entry("yaffs", YPROC_ROOT);
3436 fsinst = fs_to_install;
3438 while (fsinst->fst) {
3439 if (fsinst->installed) {
3440 unregister_filesystem(fsinst->fst);
3441 fsinst->installed = 0;
3447 module_init(init_yaffs_fs)
3448 module_exit(exit_yaffs_fs)
3450 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
3451 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2011");
3452 MODULE_LICENSE("GPL");