2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2007 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 yaffs_Device associated with
29 * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
31 * >> inode->u.generic_ip points to the associated yaffs_Object.
34 const char *yaffs_fs_c_version =
35 "$Id: yaffs_fs.c,v 1.76 2009-03-06 17:20:51 wookey Exp $";
36 extern const char *yaffs_guts_c_version;
38 #include <linux/version.h>
39 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
40 #include <linux/config.h>
42 #include <linux/kernel.h>
43 #include <linux/module.h>
44 #include <linux/slab.h>
45 #include <linux/init.h>
47 #include <linux/proc_fs.h>
48 #include <linux/smp_lock.h>
49 #include <linux/pagemap.h>
50 #include <linux/mtd/mtd.h>
51 #include <linux/interrupt.h>
52 #include <linux/string.h>
53 #include <linux/ctype.h>
55 #include "asm/div64.h"
57 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
59 #include <linux/statfs.h> /* Added NCB 15-8-2003 */
60 #include <asm/statfs.h>
61 #define UnlockPage(p) unlock_page(p)
62 #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
64 /* FIXME: use sb->s_id instead ? */
65 #define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
69 #include <linux/locks.h>
70 #define BDEVNAME_SIZE 0
71 #define yaffs_devname(sb, buf) kdevname(sb->s_dev)
73 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
74 /* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
80 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
81 #define YPROC_ROOT (&proc_root)
83 #define YPROC_ROOT NULL
86 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
87 #define WRITE_SIZE_STR "writesize"
88 #define WRITE_SIZE(mtd) ((mtd)->writesize)
90 #define WRITE_SIZE_STR "oobblock"
91 #define WRITE_SIZE(mtd) ((mtd)->oobblock)
94 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
95 #define YAFFS_USE_WRITE_BEGIN_END 1
97 #define YAFFS_USE_WRITE_BEGIN_END 0
100 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
101 static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
103 uint64_t result = partition_size;
104 do_div(result, block_size);
105 return (uint32_t)result;
108 #define YCALCBLOCKS(s, b) ((s)/(b))
111 #include <asm/uaccess.h>
113 #include "yportenv.h"
114 #include "yaffs_guts.h"
116 #include <linux/mtd/mtd.h>
117 #include "yaffs_mtdif.h"
118 #include "yaffs_mtdif1.h"
119 #include "yaffs_mtdif2.h"
121 unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
122 unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
123 unsigned int yaffs_auto_checkpoint = 1;
125 /* Module Parameters */
126 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
127 module_param(yaffs_traceMask, uint, 0644);
128 module_param(yaffs_wr_attempts, uint, 0644);
129 module_param(yaffs_auto_checkpoint, uint, 0644);
131 MODULE_PARM(yaffs_traceMask, "i");
132 MODULE_PARM(yaffs_wr_attempts, "i");
133 MODULE_PARM(yaffs_auto_checkpoint, "i");
136 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
137 /* use iget and read_inode */
138 #define Y_IGET(sb, inum) iget((sb), (inum))
139 static void yaffs_read_inode(struct inode *inode);
142 /* Call local equivalent */
143 #define YAFFS_USE_OWN_IGET
144 #define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
146 static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
149 /*#define T(x) printk x */
151 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
152 #define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
154 #define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
157 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
158 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
160 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
161 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
163 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
166 static void yaffs_put_super(struct super_block *sb);
168 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
170 static ssize_t yaffs_hold_space(struct file *f);
171 static void yaffs_release_space(struct file *f);
173 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
174 static int yaffs_file_flush(struct file *file, fl_owner_t id);
176 static int yaffs_file_flush(struct file *file);
179 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
182 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
184 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
185 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
186 struct nameidata *n);
187 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
188 struct nameidata *n);
190 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
191 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
193 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
194 struct dentry *dentry);
195 static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
196 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
197 const char *symname);
198 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
200 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
201 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
204 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
207 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
208 struct inode *new_dir, struct dentry *new_dentry);
209 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
211 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
212 static int yaffs_sync_fs(struct super_block *sb, int wait);
213 static void yaffs_write_super(struct super_block *sb);
215 static int yaffs_sync_fs(struct super_block *sb);
216 static int yaffs_write_super(struct super_block *sb);
219 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
220 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
221 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
222 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
224 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
227 #ifdef YAFFS_HAS_PUT_INODE
228 static void yaffs_put_inode(struct inode *inode);
231 static void yaffs_delete_inode(struct inode *);
232 static void yaffs_clear_inode(struct inode *);
234 static int yaffs_readpage(struct file *file, struct page *page);
235 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
236 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
238 static int yaffs_writepage(struct page *page);
242 #if (YAFFS_USE_WRITE_BEGIN_END != 0)
243 static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
244 loff_t pos, unsigned len, unsigned flags,
245 struct page **pagep, void **fsdata);
246 static int yaffs_write_end(struct file *filp, struct address_space *mapping,
247 loff_t pos, unsigned len, unsigned copied,
248 struct page *pg, void *fsdadata);
250 static int yaffs_prepare_write(struct file *f, struct page *pg,
251 unsigned offset, unsigned to);
252 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
257 static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
259 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
260 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
262 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
265 static struct address_space_operations yaffs_file_address_operations = {
266 .readpage = yaffs_readpage,
267 .writepage = yaffs_writepage,
268 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
269 .write_begin = yaffs_write_begin,
270 .write_end = yaffs_write_end,
272 .prepare_write = yaffs_prepare_write,
273 .commit_write = yaffs_commit_write,
277 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
278 static struct file_operations yaffs_file_operations = {
279 .read = do_sync_read,
280 .write = do_sync_write,
281 .aio_read = generic_file_aio_read,
282 .aio_write = generic_file_aio_write,
283 .mmap = generic_file_mmap,
284 .flush = yaffs_file_flush,
285 .fsync = yaffs_sync_object,
286 .splice_read = generic_file_splice_read,
287 .splice_write = generic_file_splice_write,
288 .llseek = generic_file_llseek,
291 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
293 static struct file_operations yaffs_file_operations = {
294 .read = do_sync_read,
295 .write = do_sync_write,
296 .aio_read = generic_file_aio_read,
297 .aio_write = generic_file_aio_write,
298 .mmap = generic_file_mmap,
299 .flush = yaffs_file_flush,
300 .fsync = yaffs_sync_object,
301 .sendfile = generic_file_sendfile,
306 static struct file_operations yaffs_file_operations = {
307 .read = generic_file_read,
308 .write = generic_file_write,
309 .mmap = generic_file_mmap,
310 .flush = yaffs_file_flush,
311 .fsync = yaffs_sync_object,
312 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
313 .sendfile = generic_file_sendfile,
318 static struct inode_operations yaffs_file_inode_operations = {
319 .setattr = yaffs_setattr,
322 static struct inode_operations yaffs_symlink_inode_operations = {
323 .readlink = yaffs_readlink,
324 .follow_link = yaffs_follow_link,
325 .setattr = yaffs_setattr,
328 static struct inode_operations yaffs_dir_inode_operations = {
329 .create = yaffs_create,
330 .lookup = yaffs_lookup,
332 .unlink = yaffs_unlink,
333 .symlink = yaffs_symlink,
334 .mkdir = yaffs_mkdir,
335 .rmdir = yaffs_unlink,
336 .mknod = yaffs_mknod,
337 .rename = yaffs_rename,
338 .setattr = yaffs_setattr,
341 static struct file_operations yaffs_dir_operations = {
342 .read = generic_read_dir,
343 .readdir = yaffs_readdir,
344 .fsync = yaffs_sync_object,
347 static struct super_operations yaffs_super_ops = {
348 .statfs = yaffs_statfs,
350 #ifndef YAFFS_USE_OWN_IGET
351 .read_inode = yaffs_read_inode,
353 #ifdef YAFFS_HAS_PUT_INODE
354 .put_inode = yaffs_put_inode,
356 .put_super = yaffs_put_super,
357 .delete_inode = yaffs_delete_inode,
358 .clear_inode = yaffs_clear_inode,
359 .sync_fs = yaffs_sync_fs,
360 .write_super = yaffs_write_super,
363 static void yaffs_GrossLock(yaffs_Device *dev)
365 T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
366 down(&dev->grossLock);
367 T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
370 static void yaffs_GrossUnlock(yaffs_Device *dev)
372 T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
376 static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
379 unsigned char *alias;
382 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
384 yaffs_GrossLock(dev);
386 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
388 yaffs_GrossUnlock(dev);
393 ret = vfs_readlink(dentry, buffer, buflen, alias);
398 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
399 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
401 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
404 unsigned char *alias;
406 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
408 yaffs_GrossLock(dev);
410 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
412 yaffs_GrossUnlock(dev);
419 ret = vfs_follow_link(nd, alias);
422 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
423 return ERR_PTR (ret);
429 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
433 * Lookup is used to find objects in the fs
435 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
437 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
440 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
444 struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
446 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
448 yaffs_GrossLock(dev);
451 ("yaffs_lookup for %d:%s\n",
452 yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
454 obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
455 dentry->d_name.name);
457 obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
459 /* Can't hold gross lock when calling yaffs_get_inode() */
460 yaffs_GrossUnlock(dev);
464 ("yaffs_lookup found %d\n", obj->objectId));
466 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
470 ("yaffs_loookup dentry \n"));
471 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
472 * d_add even if NULL inode */
474 /*dget(dentry); // try to solve directory bug */
475 d_add(dentry, inode);
483 T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
487 /* added NCB for 2.5/6 compatability - forces add even if inode is
488 * NULL which creates dentry hash */
489 d_add(dentry, inode);
492 /* return (ERR_PTR(-EIO)); */
497 #ifdef YAFFS_HAS_PUT_INODE
499 /* For now put inode is just for debugging
500 * Put inode is called when the inode **structure** is put.
502 static void yaffs_put_inode(struct inode *inode)
505 ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
506 atomic_read(&inode->i_count)));
511 /* clear is called to tell the fs to release any per-inode data it holds */
512 static void yaffs_clear_inode(struct inode *inode)
517 obj = yaffs_InodeToObject(inode);
520 ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
521 atomic_read(&inode->i_count),
522 obj ? "object exists" : "null object"));
526 yaffs_GrossLock(dev);
528 /* Clear the association between the inode and
532 yaffs_InodeToObjectLV(inode) = NULL;
534 /* If the object freeing was deferred, then the real
536 * This should fix the inode inconsistency problem.
539 yaffs_HandleDeferedFree(obj);
541 yaffs_GrossUnlock(dev);
546 /* delete is called when the link count is zero and the inode
547 * is put (ie. nobody wants to know about it anymore, time to
549 * NB Must call clear_inode()
551 static void yaffs_delete_inode(struct inode *inode)
553 yaffs_Object *obj = yaffs_InodeToObject(inode);
557 ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
558 atomic_read(&inode->i_count),
559 obj ? "object exists" : "null object"));
563 yaffs_GrossLock(dev);
564 yaffs_DeleteObject(obj);
565 yaffs_GrossUnlock(dev);
567 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
568 truncate_inode_pages (&inode->i_data, 0);
573 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
574 static int yaffs_file_flush(struct file *file, fl_owner_t id)
576 static int yaffs_file_flush(struct file *file)
579 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
581 yaffs_Device *dev = obj->myDev;
584 ("yaffs_file_flush object %d (%s)\n", obj->objectId,
585 obj->dirty ? "dirty" : "clean"));
587 yaffs_GrossLock(dev);
589 yaffs_FlushFile(obj, 1);
591 yaffs_GrossUnlock(dev);
596 static int yaffs_readpage_nolock(struct file *f, struct page *pg)
598 /* Lifted from jffs2 */
601 unsigned char *pg_buf;
606 T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n",
607 (unsigned)(pg->index << PAGE_CACHE_SHIFT),
608 (unsigned)PAGE_CACHE_SIZE));
610 obj = yaffs_DentryToObject(f->f_dentry);
614 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
615 BUG_ON(!PageLocked(pg));
622 /* FIXME: Can kmap fail? */
624 yaffs_GrossLock(dev);
627 yaffs_ReadDataFromFile(obj, pg_buf,
628 pg->index << PAGE_CACHE_SHIFT,
631 yaffs_GrossUnlock(dev);
637 ClearPageUptodate(pg);
644 flush_dcache_page(pg);
647 T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
651 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
653 int ret = yaffs_readpage_nolock(f, pg);
658 static int yaffs_readpage(struct file *f, struct page *pg)
660 return yaffs_readpage_unlock(f, pg);
663 /* writepage inspired by/stolen from smbfs */
665 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
666 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
668 static int yaffs_writepage(struct page *page)
671 struct address_space *mapping = page->mapping;
672 loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
674 unsigned long end_index;
682 inode = mapping->host;
686 if (offset > inode->i_size) {
688 ("yaffs_writepage at %08x, inode size = %08x!!!\n",
689 (unsigned)(page->index << PAGE_CACHE_SHIFT),
690 (unsigned)inode->i_size));
692 (" -> don't care!!\n"));
697 end_index = inode->i_size >> PAGE_CACHE_SHIFT;
700 if (page->index < end_index) {
701 nBytes = PAGE_CACHE_SIZE;
703 nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
710 obj = yaffs_InodeToObject(inode);
711 yaffs_GrossLock(obj->myDev);
714 ("yaffs_writepage at %08x, size %08x\n",
715 (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
717 ("writepag0: obj = %05x, ino = %05x\n",
718 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
720 nWritten = yaffs_WriteDataToFile(obj, buffer,
721 page->index << PAGE_CACHE_SHIFT, nBytes, 0);
724 ("writepag1: obj = %05x, ino = %05x\n",
725 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
727 yaffs_GrossUnlock(obj->myDev);
730 SetPageUptodate(page);
734 return (nWritten == nBytes) ? 0 : -ENOSPC;
738 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
739 static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
740 loff_t pos, unsigned len, unsigned flags,
741 struct page **pagep, void **fsdata)
743 struct page *pg = NULL;
744 pgoff_t index = pos >> PAGE_CACHE_SHIFT;
745 uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
746 uint32_t to = offset + len;
751 T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
753 #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
754 pg = grab_cache_page_write_begin(mapping, index, flags);
756 pg = __grab_cache_page(mapping, index);
765 space_held = yaffs_hold_space(filp);
772 /* Update page if required */
774 if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
775 ret = yaffs_readpage_nolock(filp, pg);
780 /* Happy path return */
781 T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
786 T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
788 yaffs_release_space(filp);
792 page_cache_release(pg);
799 static int yaffs_prepare_write(struct file *f, struct page *pg,
800 unsigned offset, unsigned to)
802 T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
804 if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
805 return yaffs_readpage_nolock(f, pg);
810 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
811 static int yaffs_write_end(struct file *filp, struct address_space *mapping,
812 loff_t pos, unsigned len, unsigned copied,
813 struct page *pg, void *fsdadata)
817 uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
820 addr = kva + offset_into_page;
823 ("yaffs_write_end addr %x pos %x nBytes %d\n",
827 ret = yaffs_file_write(filp, addr, copied, &pos);
831 ("yaffs_write_end not same size ret %d copied %d\n",
834 ClearPageUptodate(pg);
841 yaffs_release_space(filp);
843 page_cache_release(pg);
848 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
853 loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
854 int nBytes = to - offset;
863 saddr = (unsigned) addr;
866 ("yaffs_commit_write addr %x pos %x nBytes %d\n",
867 saddr, spos, nBytes));
869 nWritten = yaffs_file_write(f, addr, nBytes, &pos);
871 if (nWritten != nBytes) {
873 ("yaffs_commit_write not same size nWritten %d nBytes %d\n",
876 ClearPageUptodate(pg);
884 ("yaffs_commit_write returning %d\n",
885 nWritten == nBytes ? 0 : nWritten));
887 return nWritten == nBytes ? 0 : nWritten;
892 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
897 /* Check mode against the variant type and attempt to repair if broken. */
898 __u32 mode = obj->yst_mode;
899 switch (obj->variantType) {
900 case YAFFS_OBJECT_TYPE_FILE:
901 if (!S_ISREG(mode)) {
902 obj->yst_mode &= ~S_IFMT;
903 obj->yst_mode |= S_IFREG;
907 case YAFFS_OBJECT_TYPE_SYMLINK:
908 if (!S_ISLNK(mode)) {
909 obj->yst_mode &= ~S_IFMT;
910 obj->yst_mode |= S_IFLNK;
914 case YAFFS_OBJECT_TYPE_DIRECTORY:
915 if (!S_ISDIR(mode)) {
916 obj->yst_mode &= ~S_IFMT;
917 obj->yst_mode |= S_IFDIR;
921 case YAFFS_OBJECT_TYPE_UNKNOWN:
922 case YAFFS_OBJECT_TYPE_HARDLINK:
923 case YAFFS_OBJECT_TYPE_SPECIAL:
929 inode->i_flags |= S_NOATIME;
931 inode->i_ino = obj->objectId;
932 inode->i_mode = obj->yst_mode;
933 inode->i_uid = obj->yst_uid;
934 inode->i_gid = obj->yst_gid;
935 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
936 inode->i_blksize = inode->i_sb->s_blocksize;
938 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
940 inode->i_rdev = old_decode_dev(obj->yst_rdev);
941 inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
942 inode->i_atime.tv_nsec = 0;
943 inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
944 inode->i_mtime.tv_nsec = 0;
945 inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
946 inode->i_ctime.tv_nsec = 0;
948 inode->i_rdev = obj->yst_rdev;
949 inode->i_atime = obj->yst_atime;
950 inode->i_mtime = obj->yst_mtime;
951 inode->i_ctime = obj->yst_ctime;
953 inode->i_size = yaffs_GetObjectFileLength(obj);
954 inode->i_blocks = (inode->i_size + 511) >> 9;
956 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
959 ("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
960 inode->i_mode, inode->i_uid, inode->i_gid,
961 (int)inode->i_size, atomic_read(&inode->i_count)));
963 switch (obj->yst_mode & S_IFMT) {
964 default: /* fifo, device or socket */
965 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
966 init_special_inode(inode, obj->yst_mode,
967 old_decode_dev(obj->yst_rdev));
969 init_special_inode(inode, obj->yst_mode,
970 (dev_t) (obj->yst_rdev));
973 case S_IFREG: /* file */
974 inode->i_op = &yaffs_file_inode_operations;
975 inode->i_fop = &yaffs_file_operations;
976 inode->i_mapping->a_ops =
977 &yaffs_file_address_operations;
979 case S_IFDIR: /* directory */
980 inode->i_op = &yaffs_dir_inode_operations;
981 inode->i_fop = &yaffs_dir_operations;
983 case S_IFLNK: /* symlink */
984 inode->i_op = &yaffs_symlink_inode_operations;
988 yaffs_InodeToObjectLV(inode) = obj;
990 obj->myInode = inode;
994 ("yaffs_FileInode invalid parameters\n"));
999 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
1002 struct inode *inode;
1006 ("yaffs_get_inode for NULL super_block!!\n"));
1013 ("yaffs_get_inode for NULL object!!\n"));
1019 ("yaffs_get_inode for object %d\n", obj->objectId));
1021 inode = Y_IGET(sb, obj->objectId);
1025 /* NB Side effect: iget calls back to yaffs_read_inode(). */
1026 /* iget also increments the inode's i_count */
1027 /* NB You can't be holding grossLock or deadlock will happen! */
1032 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
1037 struct inode *inode;
1040 obj = yaffs_DentryToObject(f->f_dentry);
1044 yaffs_GrossLock(dev);
1046 inode = f->f_dentry->d_inode;
1048 if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) {
1049 ipos = inode->i_size;
1056 ("yaffs_file_write: hey obj is null!\n"));
1059 ("yaffs_file_write about to write writing %zu bytes"
1060 "to object %d at %d\n",
1061 n, obj->objectId, ipos));
1064 nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
1067 ("yaffs_file_write writing %zu bytes, %d written at %d\n",
1068 n, nWritten, ipos));
1072 if (ipos > inode->i_size) {
1073 inode->i_size = ipos;
1074 inode->i_blocks = (ipos + 511) >> 9;
1077 ("yaffs_file_write size updated to %d bytes, "
1079 ipos, (int)(inode->i_blocks)));
1083 yaffs_GrossUnlock(dev);
1084 return nWritten == 0 ? -ENOSPC : nWritten;
1087 /* Space holding and freeing is done to ensure we have space available for write_begin/end */
1088 /* For now we just assume few parallel writes and check against a small number. */
1089 /* Todo: need to do this with a counter to handle parallel reads better */
1091 static ssize_t yaffs_hold_space(struct file *f)
1099 obj = yaffs_DentryToObject(f->f_dentry);
1103 yaffs_GrossLock(dev);
1105 nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
1107 yaffs_GrossUnlock(dev);
1109 return (nFreeChunks > 20) ? 1 : 0;
1112 static void yaffs_release_space(struct file *f)
1118 obj = yaffs_DentryToObject(f->f_dentry);
1122 yaffs_GrossLock(dev);
1125 yaffs_GrossUnlock(dev);
1128 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
1132 struct inode *inode = f->f_dentry->d_inode;
1133 unsigned long offset, curoffs;
1134 struct ylist_head *i;
1137 char name[YAFFS_MAX_NAME_LENGTH + 1];
1139 obj = yaffs_DentryToObject(f->f_dentry);
1142 yaffs_GrossLock(dev);
1146 T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
1150 ("yaffs_readdir: entry . ino %d \n",
1151 (int)inode->i_ino));
1152 if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
1160 ("yaffs_readdir: entry .. ino %d \n",
1161 (int)f->f_dentry->d_parent->d_inode->i_ino));
1162 if (filldir(dirent, "..", 2, offset,
1163 f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
1172 /* If the directory has changed since the open or last call to
1173 readdir, rewind to after the 2 canned entries. */
1175 if (f->f_version != inode->i_version) {
1178 f->f_version = inode->i_version;
1181 ylist_for_each(i, &obj->variant.directoryVariant.children) {
1183 if (curoffs >= offset) {
1184 l = ylist_entry(i, yaffs_Object, siblings);
1186 yaffs_GetObjectName(l, name,
1187 YAFFS_MAX_NAME_LENGTH + 1);
1189 ("yaffs_readdir: %s inode %d\n", name,
1190 yaffs_GetObjectInode(l)));
1196 yaffs_GetObjectInode(l),
1197 yaffs_GetObjectType(l)) < 0) {
1208 yaffs_GrossUnlock(dev);
1214 * File creation. Allocate an inode, and we're done..
1217 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
1220 #define YCRED(x) (x->cred)
1223 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1224 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1227 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1231 struct inode *inode;
1233 yaffs_Object *obj = NULL;
1236 yaffs_Object *parent = yaffs_InodeToObject(dir);
1238 int error = -ENOSPC;
1239 uid_t uid = YCRED(current)->fsuid;
1240 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
1242 if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
1247 ("yaffs_mknod: parent object %d type %d\n",
1248 parent->objectId, parent->variantType));
1251 ("yaffs_mknod: could not get parent object\n"));
1255 T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
1257 dentry->d_name.name, mode, rdev));
1259 dev = parent->myDev;
1261 yaffs_GrossLock(dev);
1263 switch (mode & S_IFMT) {
1265 /* Special (socket, fifo, device...) */
1266 T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
1267 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1268 obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1269 gid, old_encode_dev(rdev));
1271 obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1275 case S_IFREG: /* file */
1276 T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
1277 obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
1280 case S_IFDIR: /* directory */
1282 ("yaffs_mknod: making directory\n"));
1283 obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
1286 case S_IFLNK: /* symlink */
1287 T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
1288 obj = NULL; /* Do we ever get here? */
1292 /* Can not call yaffs_get_inode() with gross lock held */
1293 yaffs_GrossUnlock(dev);
1296 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
1297 d_instantiate(dentry, inode);
1299 ("yaffs_mknod created object %d count = %d\n",
1300 obj->objectId, atomic_read(&inode->i_count)));
1304 ("yaffs_mknod failed making object\n"));
1311 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1314 T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
1315 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
1317 /* attempt to fix dir bug - didn't work */
1325 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1326 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
1327 struct nameidata *n)
1329 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
1332 T(YAFFS_TRACE_OS, ("yaffs_create\n"));
1333 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
1336 static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
1343 ("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
1344 dentry->d_name.name));
1346 dev = yaffs_InodeToObject(dir)->myDev;
1348 yaffs_GrossLock(dev);
1350 retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
1352 if (retVal == YAFFS_OK) {
1353 dentry->d_inode->i_nlink--;
1355 yaffs_GrossUnlock(dev);
1356 mark_inode_dirty(dentry->d_inode);
1359 yaffs_GrossUnlock(dev);
1366 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
1367 struct dentry *dentry)
1369 struct inode *inode = old_dentry->d_inode;
1370 yaffs_Object *obj = NULL;
1371 yaffs_Object *link = NULL;
1374 T(YAFFS_TRACE_OS, ("yaffs_link\n"));
1376 obj = yaffs_InodeToObject(inode);
1379 yaffs_GrossLock(dev);
1381 if (!S_ISDIR(inode->i_mode)) { /* Don't link directories */
1382 link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
1387 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1388 d_instantiate(dentry, old_dentry->d_inode);
1389 atomic_inc(&old_dentry->d_inode->i_count);
1391 ("yaffs_link link count %d i_count %d\n",
1392 old_dentry->d_inode->i_nlink,
1393 atomic_read(&old_dentry->d_inode->i_count)));
1396 yaffs_GrossUnlock(dev);
1405 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
1406 const char *symname)
1410 uid_t uid = YCRED(current)->fsuid;
1411 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
1413 T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
1415 dev = yaffs_InodeToObject(dir)->myDev;
1416 yaffs_GrossLock(dev);
1417 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1418 S_IFLNK | S_IRWXUGO, uid, gid, symname);
1419 yaffs_GrossUnlock(dev);
1422 struct inode *inode;
1424 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1425 d_instantiate(dentry, inode);
1426 T(YAFFS_TRACE_OS, ("symlink created OK\n"));
1429 T(YAFFS_TRACE_OS, ("symlink not created\n"));
1435 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
1442 obj = yaffs_DentryToObject(dentry);
1446 T(YAFFS_TRACE_OS, ("yaffs_sync_object\n"));
1447 yaffs_GrossLock(dev);
1448 yaffs_FlushFile(obj, 1);
1449 yaffs_GrossUnlock(dev);
1454 * The VFS layer already does all the dentry stuff for rename.
1456 * NB: POSIX says you can rename an object over an old object of the same name
1458 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
1459 struct inode *new_dir, struct dentry *new_dentry)
1462 int retVal = YAFFS_FAIL;
1463 yaffs_Object *target;
1465 T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
1466 dev = yaffs_InodeToObject(old_dir)->myDev;
1468 yaffs_GrossLock(dev);
1470 /* Check if the target is an existing directory that is not empty. */
1471 target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
1472 new_dentry->d_name.name);
1476 if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1477 !ylist_empty(&target->variant.directoryVariant.children)) {
1479 T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
1481 retVal = YAFFS_FAIL;
1483 /* Now does unlinking internally using shadowing mechanism */
1484 T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
1486 retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
1487 old_dentry->d_name.name,
1488 yaffs_InodeToObject(new_dir),
1489 new_dentry->d_name.name);
1491 yaffs_GrossUnlock(dev);
1493 if (retVal == YAFFS_OK) {
1495 new_dentry->d_inode->i_nlink--;
1496 mark_inode_dirty(new_dentry->d_inode);
1505 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1507 struct inode *inode = dentry->d_inode;
1512 ("yaffs_setattr of object %d\n",
1513 yaffs_InodeToObject(inode)->objectId));
1515 error = inode_change_ok(inode, attr);
1517 dev = yaffs_InodeToObject(inode)->myDev;
1518 yaffs_GrossLock(dev);
1519 if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
1525 yaffs_GrossUnlock(dev);
1527 error = inode_setattr(inode, attr);
1532 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1533 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
1535 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
1536 struct super_block *sb = dentry->d_sb;
1537 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1538 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1540 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1542 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1544 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1547 T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
1549 yaffs_GrossLock(dev);
1551 buf->f_type = YAFFS_MAGIC;
1552 buf->f_bsize = sb->s_blocksize;
1553 buf->f_namelen = 255;
1555 if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
1556 /* Do this if chunk size is not a power of 2 */
1558 uint64_t bytesInDev;
1561 bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) *
1562 ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
1564 do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
1565 buf->f_blocks = bytesInDev;
1567 bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
1568 ((uint64_t)(dev->nDataBytesPerChunk));
1570 do_div(bytesFree, sb->s_blocksize);
1572 buf->f_bfree = bytesFree;
1574 } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
1577 (dev->endBlock - dev->startBlock + 1) *
1578 dev->nChunksPerBlock /
1579 (sb->s_blocksize / dev->nDataBytesPerChunk);
1581 yaffs_GetNumberOfFreeChunks(dev) /
1582 (sb->s_blocksize / dev->nDataBytesPerChunk);
1585 (dev->endBlock - dev->startBlock + 1) *
1586 dev->nChunksPerBlock *
1587 (dev->nDataBytesPerChunk / sb->s_blocksize);
1590 yaffs_GetNumberOfFreeChunks(dev) *
1591 (dev->nDataBytesPerChunk / sb->s_blocksize);
1596 buf->f_bavail = buf->f_bfree;
1598 yaffs_GrossUnlock(dev);
1603 static int yaffs_do_sync_fs(struct super_block *sb)
1606 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1607 T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n"));
1610 yaffs_GrossLock(dev);
1613 yaffs_FlushEntireDeviceCache(dev);
1614 yaffs_CheckpointSave(dev);
1617 yaffs_GrossUnlock(dev);
1625 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1626 static void yaffs_write_super(struct super_block *sb)
1628 static int yaffs_write_super(struct super_block *sb)
1632 T(YAFFS_TRACE_OS, ("yaffs_write_super\n"));
1633 if (yaffs_auto_checkpoint >= 2)
1634 yaffs_do_sync_fs(sb);
1635 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
1641 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1642 static int yaffs_sync_fs(struct super_block *sb, int wait)
1644 static int yaffs_sync_fs(struct super_block *sb)
1647 T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n"));
1649 if (yaffs_auto_checkpoint >= 1)
1650 yaffs_do_sync_fs(sb);
1655 #ifdef YAFFS_USE_OWN_IGET
1657 static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
1659 struct inode *inode;
1661 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1664 ("yaffs_iget for %lu\n", ino));
1666 inode = iget_locked(sb, ino);
1668 return ERR_PTR(-ENOMEM);
1669 if (!(inode->i_state & I_NEW))
1672 /* NB This is called as a side effect of other functions, but
1673 * we had to release the lock to prevent deadlocks, so
1674 * need to lock again.
1677 yaffs_GrossLock(dev);
1679 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
1681 yaffs_FillInodeFromObject(inode, obj);
1683 yaffs_GrossUnlock(dev);
1685 unlock_new_inode(inode);
1691 static void yaffs_read_inode(struct inode *inode)
1693 /* NB This is called as a side effect of other functions, but
1694 * we had to release the lock to prevent deadlocks, so
1695 * need to lock again.
1699 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
1702 ("yaffs_read_inode for %d\n", (int)inode->i_ino));
1704 yaffs_GrossLock(dev);
1706 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
1708 yaffs_FillInodeFromObject(inode, obj);
1710 yaffs_GrossUnlock(dev);
1715 static YLIST_HEAD(yaffs_dev_list);
1717 #if 0 /* not used */
1718 static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
1720 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1722 if (*flags & MS_RDONLY) {
1723 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1726 ("yaffs_remount_fs: %s: RO\n", dev->name));
1728 yaffs_GrossLock(dev);
1730 yaffs_FlushEntireDeviceCache(dev);
1732 yaffs_CheckpointSave(dev);
1737 yaffs_GrossUnlock(dev);
1740 ("yaffs_remount_fs: %s: RW\n", dev->name));
1747 static void yaffs_put_super(struct super_block *sb)
1749 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1751 T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
1753 yaffs_GrossLock(dev);
1755 yaffs_FlushEntireDeviceCache(dev);
1757 yaffs_CheckpointSave(dev);
1759 if (dev->putSuperFunc)
1760 dev->putSuperFunc(sb);
1762 yaffs_Deinitialise(dev);
1764 yaffs_GrossUnlock(dev);
1766 /* we assume this is protected by lock_kernel() in mount/umount */
1767 ylist_del(&dev->devList);
1769 if (dev->spareBuffer) {
1770 YFREE(dev->spareBuffer);
1771 dev->spareBuffer = NULL;
1778 static void yaffs_MTDPutSuper(struct super_block *sb)
1780 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1785 put_mtd_device(mtd);
1789 static void yaffs_MarkSuperBlockDirty(void *vsb)
1791 struct super_block *sb = (struct super_block *)vsb;
1793 T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
1800 int skip_checkpoint_read;
1801 int skip_checkpoint_write;
1805 #define MAX_OPT_LEN 20
1806 static int yaffs_parse_options(yaffs_options *options, const char *options_str)
1808 char cur_opt[MAX_OPT_LEN + 1];
1812 /* Parse through the options which is a comma seperated list */
1814 while (options_str && *options_str && !error) {
1815 memset(cur_opt, 0, MAX_OPT_LEN + 1);
1818 while (*options_str && *options_str != ',') {
1819 if (p < MAX_OPT_LEN) {
1820 cur_opt[p] = *options_str;
1826 if (!strcmp(cur_opt, "inband-tags"))
1827 options->inband_tags = 1;
1828 else if (!strcmp(cur_opt, "no-cache"))
1829 options->no_cache = 1;
1830 else if (!strcmp(cur_opt, "no-checkpoint-read"))
1831 options->skip_checkpoint_read = 1;
1832 else if (!strcmp(cur_opt, "no-checkpoint-write"))
1833 options->skip_checkpoint_write = 1;
1834 else if (!strcmp(cur_opt, "no-checkpoint")) {
1835 options->skip_checkpoint_read = 1;
1836 options->skip_checkpoint_write = 1;
1838 printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
1847 static struct super_block *yaffs_internal_read_super(int yaffsVersion,
1848 struct super_block *sb,
1849 void *data, int silent)
1852 struct inode *inode = NULL;
1853 struct dentry *root;
1854 yaffs_Device *dev = 0;
1855 char devname_buf[BDEVNAME_SIZE + 1];
1856 struct mtd_info *mtd;
1858 char *data_str = (char *)data;
1860 yaffs_options options;
1862 sb->s_magic = YAFFS_MAGIC;
1863 sb->s_op = &yaffs_super_ops;
1864 sb->s_flags |= MS_NOATIME;
1867 printk(KERN_INFO "yaffs: sb is NULL\n");
1868 else if (!sb->s_dev)
1869 printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
1870 else if (!yaffs_devname(sb, devname_buf))
1871 printk(KERN_INFO "yaffs: devname is NULL\n");
1873 printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
1875 yaffs_devname(sb, devname_buf));
1880 printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
1882 memset(&options, 0, sizeof(options));
1884 if (yaffs_parse_options(&options, data_str)) {
1885 /* Option parsing failed */
1890 sb->s_blocksize = PAGE_CACHE_SIZE;
1891 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
1892 T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
1894 ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
1896 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
1898 ("yaffs: Write verification disabled. All guarantees "
1899 "null and void\n"));
1902 T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
1904 MAJOR(sb->s_dev), MINOR(sb->s_dev),
1905 yaffs_devname(sb, devname_buf)));
1907 /* Check it's an mtd device..... */
1908 if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) {
1909 return NULL; /* This isn't an mtd device */
1911 /* Get the device */
1912 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
1914 T(YAFFS_TRACE_ALWAYS,
1915 ("yaffs: MTD device #%u doesn't appear to exist\n",
1919 /* Check it's NAND */
1920 if (mtd->type != MTD_NANDFLASH) {
1921 T(YAFFS_TRACE_ALWAYS,
1922 ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
1926 T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
1927 T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
1928 T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
1929 T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
1930 T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
1931 T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
1932 T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
1933 T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
1934 T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
1935 T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
1936 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
1937 T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
1939 T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
1942 #ifdef CONFIG_YAFFS_AUTO_YAFFS2
1944 if (yaffsVersion == 1 &&
1945 WRITE_SIZE(mtd) >= 2048) {
1946 T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
1950 /* Added NCB 26/5/2006 for completeness */
1951 if (yaffsVersion == 2 &&
1952 !options.inband_tags &&
1953 WRITE_SIZE(mtd) == 512) {
1954 T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
1960 if (yaffsVersion == 2) {
1961 /* Check for version 2 style functions */
1963 !mtd->block_isbad ||
1964 !mtd->block_markbad ||
1967 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1968 !mtd->read_oob || !mtd->write_oob) {
1971 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1973 T(YAFFS_TRACE_ALWAYS,
1974 ("yaffs: MTD device does not support required "
1979 if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
1980 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
1981 !options.inband_tags) {
1982 T(YAFFS_TRACE_ALWAYS,
1983 ("yaffs: MTD device does not have the "
1984 "right page sizes\n"));
1988 /* Check for V1 style functions */
1992 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1993 !mtd->read_oob || !mtd->write_oob) {
1996 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1998 T(YAFFS_TRACE_ALWAYS,
1999 ("yaffs: MTD device does not support required "
2004 if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
2005 mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
2006 T(YAFFS_TRACE_ALWAYS,
2007 ("yaffs: MTD device does not support have the "
2008 "right page sizes\n"));
2013 /* OK, so if we got here, we have an MTD that's NAND and looks
2014 * like it has the right capabilities
2015 * Set the yaffs_Device up for mtd
2018 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2019 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
2021 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
2024 /* Deep shit could not allocate device structure */
2025 T(YAFFS_TRACE_ALWAYS,
2026 ("yaffs_read_super: Failed trying to allocate "
2027 "yaffs_Device. \n"));
2031 memset(dev, 0, sizeof(yaffs_Device));
2032 dev->genericDevice = mtd;
2033 dev->name = mtd->name;
2035 /* Set up the memory size parameters.... */
2037 nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
2039 dev->startBlock = 0;
2040 dev->endBlock = nBlocks - 1;
2041 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
2042 dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
2043 dev->nReservedBlocks = 5;
2044 dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
2045 dev->inbandTags = options.inband_tags;
2047 /* ... and the functions. */
2048 if (yaffsVersion == 2) {
2049 dev->writeChunkWithTagsToNAND =
2050 nandmtd2_WriteChunkWithTagsToNAND;
2051 dev->readChunkWithTagsFromNAND =
2052 nandmtd2_ReadChunkWithTagsFromNAND;
2053 dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
2054 dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
2055 dev->spareBuffer = YMALLOC(mtd->oobsize);
2057 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2058 dev->totalBytesPerChunk = mtd->writesize;
2059 dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
2061 dev->totalBytesPerChunk = mtd->oobblock;
2062 dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
2064 nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
2066 dev->startBlock = 0;
2067 dev->endBlock = nBlocks - 1;
2069 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2070 /* use the MTD interface in yaffs_mtdif1.c */
2071 dev->writeChunkWithTagsToNAND =
2072 nandmtd1_WriteChunkWithTagsToNAND;
2073 dev->readChunkWithTagsFromNAND =
2074 nandmtd1_ReadChunkWithTagsFromNAND;
2075 dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
2076 dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
2078 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
2079 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
2083 /* ... and common functions */
2084 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
2085 dev->initialiseNAND = nandmtd_InitialiseNAND;
2087 dev->putSuperFunc = yaffs_MTDPutSuper;
2089 dev->superBlock = (void *)sb;
2090 dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
2093 #ifndef CONFIG_YAFFS_DOES_ECC
2094 dev->useNANDECC = 1;
2097 #ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
2098 dev->wideTnodesDisabled = 1;
2101 dev->skipCheckpointRead = options.skip_checkpoint_read;
2102 dev->skipCheckpointWrite = options.skip_checkpoint_write;
2104 /* we assume this is protected by lock_kernel() in mount/umount */
2105 ylist_add_tail(&dev->devList, &yaffs_dev_list);
2107 init_MUTEX(&dev->grossLock);
2109 yaffs_GrossLock(dev);
2111 err = yaffs_GutsInitialise(dev);
2114 ("yaffs_read_super: guts initialised %s\n",
2115 (err == YAFFS_OK) ? "OK" : "FAILED"));
2117 /* Release lock before yaffs_get_inode() */
2118 yaffs_GrossUnlock(dev);
2120 /* Create root inode */
2121 if (err == YAFFS_OK)
2122 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
2128 inode->i_op = &yaffs_dir_inode_operations;
2129 inode->i_fop = &yaffs_dir_operations;
2131 T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
2133 root = d_alloc_root(inode);
2135 T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
2142 sb->s_dirt = !dev->isCheckpointed;
2143 T(YAFFS_TRACE_ALWAYS,
2144 ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
2146 T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
2151 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2152 static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
2155 return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
2158 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2159 static int yaffs_read_super(struct file_system_type *fs,
2160 int flags, const char *dev_name,
2161 void *data, struct vfsmount *mnt)
2164 return get_sb_bdev(fs, flags, dev_name, data,
2165 yaffs_internal_read_super_mtd, mnt);
2168 static struct super_block *yaffs_read_super(struct file_system_type *fs,
2169 int flags, const char *dev_name,
2173 return get_sb_bdev(fs, flags, dev_name, data,
2174 yaffs_internal_read_super_mtd);
2178 static struct file_system_type yaffs_fs_type = {
2179 .owner = THIS_MODULE,
2181 .get_sb = yaffs_read_super,
2182 .kill_sb = kill_block_super,
2183 .fs_flags = FS_REQUIRES_DEV,
2186 static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
2189 return yaffs_internal_read_super(1, sb, data, silent);
2192 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
2197 #ifdef CONFIG_YAFFS_YAFFS2
2199 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2200 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
2203 return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
2206 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2207 static int yaffs2_read_super(struct file_system_type *fs,
2208 int flags, const char *dev_name, void *data,
2209 struct vfsmount *mnt)
2211 return get_sb_bdev(fs, flags, dev_name, data,
2212 yaffs2_internal_read_super_mtd, mnt);
2215 static struct super_block *yaffs2_read_super(struct file_system_type *fs,
2216 int flags, const char *dev_name,
2220 return get_sb_bdev(fs, flags, dev_name, data,
2221 yaffs2_internal_read_super_mtd);
2225 static struct file_system_type yaffs2_fs_type = {
2226 .owner = THIS_MODULE,
2228 .get_sb = yaffs2_read_super,
2229 .kill_sb = kill_block_super,
2230 .fs_flags = FS_REQUIRES_DEV,
2233 static struct super_block *yaffs2_read_super(struct super_block *sb,
2234 void *data, int silent)
2236 return yaffs_internal_read_super(2, sb, data, silent);
2239 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
2243 #endif /* CONFIG_YAFFS_YAFFS2 */
2245 static struct proc_dir_entry *my_proc_entry;
2247 static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
2249 buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
2250 buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
2251 buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
2252 buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
2253 buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
2254 buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
2255 buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
2256 buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
2257 buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
2258 buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
2259 buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
2260 buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
2261 buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
2262 buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
2263 buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
2264 buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
2265 buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
2266 buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
2267 buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
2268 buf += sprintf(buf, "passiveGCs......... %d\n",
2269 dev->passiveGarbageCollections);
2270 buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
2271 buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
2272 buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
2273 buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
2274 buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
2275 buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
2276 buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
2277 buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
2278 buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
2279 buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
2281 sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
2282 buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
2283 buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
2284 buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
2289 static int yaffs_proc_read(char *page,
2291 off_t offset, int count, int *eof, void *data)
2293 struct ylist_head *item;
2298 /* Get proc_file_read() to step 'offset' by one on each sucessive call.
2299 * We use 'offset' (*ppos) to indicate where we are in devList.
2300 * This also assumes the user has posted a read buffer large
2301 * enough to hold the complete output; but that's life in /proc.
2306 /* Print header first */
2308 buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
2309 "\n%s\n%s\n", yaffs_fs_c_version,
2310 yaffs_guts_c_version);
2313 /* hold lock_kernel while traversing yaffs_dev_list */
2316 /* Locate and print the Nth entry. Order N-squared but N is small. */
2317 ylist_for_each(item, &yaffs_dev_list) {
2318 yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
2323 buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
2324 buf = yaffs_dump_dev(buf, dev);
2329 return buf - page < count ? buf - page : count;
2333 * Set the verbosity of the warnings and error messages.
2335 * Note that the names can only be a..z or _ with the current code.
2340 unsigned mask_bitfield;
2342 {"allocate", YAFFS_TRACE_ALLOCATE},
2343 {"always", YAFFS_TRACE_ALWAYS},
2344 {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
2345 {"buffers", YAFFS_TRACE_BUFFERS},
2346 {"bug", YAFFS_TRACE_BUG},
2347 {"checkpt", YAFFS_TRACE_CHECKPOINT},
2348 {"deletion", YAFFS_TRACE_DELETION},
2349 {"erase", YAFFS_TRACE_ERASE},
2350 {"error", YAFFS_TRACE_ERROR},
2351 {"gc_detail", YAFFS_TRACE_GC_DETAIL},
2352 {"gc", YAFFS_TRACE_GC},
2353 {"mtd", YAFFS_TRACE_MTD},
2354 {"nandaccess", YAFFS_TRACE_NANDACCESS},
2355 {"os", YAFFS_TRACE_OS},
2356 {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
2357 {"scan", YAFFS_TRACE_SCAN},
2358 {"tracing", YAFFS_TRACE_TRACING},
2360 {"verify", YAFFS_TRACE_VERIFY},
2361 {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
2362 {"verify_full", YAFFS_TRACE_VERIFY_FULL},
2363 {"verify_all", YAFFS_TRACE_VERIFY_ALL},
2365 {"write", YAFFS_TRACE_WRITE},
2366 {"all", 0xffffffff},
2371 #define MAX_MASK_NAME_LENGTH 40
2372 static int yaffs_proc_write(struct file *file, const char *buf,
2373 unsigned long count, void *data)
2375 unsigned rg = 0, mask_bitfield;
2379 char substring[MAX_MASK_NAME_LENGTH + 1];
2385 rg = yaffs_traceMask;
2387 while (!done && (pos < count)) {
2389 while ((pos < count) && isspace(buf[pos])) {
2407 mask_bitfield = simple_strtoul(buf + pos, &end, 0);
2408 if (end > buf + pos) {
2409 mask_name = "numeral";
2410 len = end - (buf + pos);
2414 for (x = buf + pos, i = 0;
2415 (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
2416 i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
2418 substring[i] = '\0';
2420 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2421 if (strcmp(substring, mask_flags[i].mask_name) == 0) {
2422 mask_name = mask_flags[i].mask_name;
2423 mask_bitfield = mask_flags[i].mask_bitfield;
2430 if (mask_name != NULL) {
2434 rg &= ~mask_bitfield;
2437 rg |= mask_bitfield;
2443 rg |= mask_bitfield;
2449 yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
2451 printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
2453 if (rg & YAFFS_TRACE_ALWAYS) {
2454 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2456 flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
2457 printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
2464 /* Stuff to handle installation of file systems */
2465 struct file_system_to_install {
2466 struct file_system_type *fst;
2470 static struct file_system_to_install fs_to_install[] = {
2471 {&yaffs_fs_type, 0},
2472 {&yaffs2_fs_type, 0},
2476 static int __init init_yaffs_fs(void)
2479 struct file_system_to_install *fsinst;
2481 T(YAFFS_TRACE_ALWAYS,
2482 ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
2484 /* Install the proc_fs entry */
2485 my_proc_entry = create_proc_entry("yaffs",
2489 if (my_proc_entry) {
2490 my_proc_entry->write_proc = yaffs_proc_write;
2491 my_proc_entry->read_proc = yaffs_proc_read;
2492 my_proc_entry->data = NULL;
2497 /* Now add the file system entries */
2499 fsinst = fs_to_install;
2501 while (fsinst->fst && !error) {
2502 error = register_filesystem(fsinst->fst);
2504 fsinst->installed = 1;
2509 /* Any errors? uninstall */
2511 fsinst = fs_to_install;
2513 while (fsinst->fst) {
2514 if (fsinst->installed) {
2515 unregister_filesystem(fsinst->fst);
2516 fsinst->installed = 0;
2525 static void __exit exit_yaffs_fs(void)
2528 struct file_system_to_install *fsinst;
2530 T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
2533 remove_proc_entry("yaffs", YPROC_ROOT);
2535 fsinst = fs_to_install;
2537 while (fsinst->fst) {
2538 if (fsinst->installed) {
2539 unregister_filesystem(fsinst->fst);
2540 fsinst->installed = 0;
2546 module_init(init_yaffs_fs)
2547 module_exit(exit_yaffs_fs)
2549 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
2550 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
2551 MODULE_LICENSE("GPL");