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 1.68 2008-07-23 03:35:12 charles 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 #include <asm/uaccess.h>
97 #include "yaffs_guts.h"
99 #include <linux/mtd/mtd.h>
100 #include "yaffs_mtdif.h"
101 #include "yaffs_mtdif1.h"
102 #include "yaffs_mtdif2.h"
104 unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
105 unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
107 /* Module Parameters */
108 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
109 module_param(yaffs_traceMask,uint,0644);
110 module_param(yaffs_wr_attempts,uint,0644);
112 MODULE_PARM(yaffs_traceMask,"i");
113 MODULE_PARM(yaffs_wr_attempts,"i");
116 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
117 /* use iget and read_inode */
118 #define Y_IGET(sb,inum) iget((sb),(inum))
119 static void yaffs_read_inode(struct inode *inode);
122 /* Call local equivalent */
123 #define YAFFS_USE_OWN_IGET
124 #define Y_IGET(sb,inum) yaffs_iget((sb),(inum))
126 static struct inode * yaffs_iget(struct super_block *sb, unsigned long ino);
129 /*#define T(x) printk x */
131 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
132 #define yaffs_InodeToObjectLV(iptr) (iptr)->i_private
134 #define yaffs_InodeToObjectLV(iptr) (iptr)->u.generic_ip
137 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
138 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
140 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
141 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
143 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
146 static void yaffs_put_super(struct super_block *sb);
148 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
151 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
152 static int yaffs_file_flush(struct file *file, fl_owner_t id);
154 static int yaffs_file_flush(struct file *file);
157 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
160 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
162 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
163 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
164 struct nameidata *n);
165 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
166 struct nameidata *n);
168 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
169 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
171 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
172 struct dentry *dentry);
173 static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
174 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
175 const char *symname);
176 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
178 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
179 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
182 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
185 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
186 struct inode *new_dir, struct dentry *new_dentry);
187 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
189 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
190 static int yaffs_sync_fs(struct super_block *sb, int wait);
191 static void yaffs_write_super(struct super_block *sb);
193 static int yaffs_sync_fs(struct super_block *sb);
194 static int yaffs_write_super(struct super_block *sb);
197 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
198 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
199 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
200 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
202 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
205 #ifdef YAFFS_HAS_PUT_INODE
206 static void yaffs_put_inode(struct inode *inode);
209 static void yaffs_delete_inode(struct inode *);
210 static void yaffs_clear_inode(struct inode *);
212 static int yaffs_readpage(struct file *file, struct page *page);
213 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
214 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
216 static int yaffs_writepage(struct page *page);
218 static int yaffs_prepare_write(struct file *f, struct page *pg,
219 unsigned offset, unsigned to);
220 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
223 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
225 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
226 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
228 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
231 static struct address_space_operations yaffs_file_address_operations = {
232 .readpage = yaffs_readpage,
233 .writepage = yaffs_writepage,
234 .prepare_write = yaffs_prepare_write,
235 .commit_write = yaffs_commit_write,
238 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22))
239 static struct file_operations yaffs_file_operations = {
240 .read = do_sync_read,
241 .write = do_sync_write,
242 .aio_read = generic_file_aio_read,
243 .aio_write = generic_file_aio_write,
244 .mmap = generic_file_mmap,
245 .flush = yaffs_file_flush,
246 .fsync = yaffs_sync_object,
247 .splice_read = generic_file_splice_read,
248 .splice_write = generic_file_splice_write,
251 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
253 static struct file_operations yaffs_file_operations = {
254 .read = do_sync_read,
255 .write = do_sync_write,
256 .aio_read = generic_file_aio_read,
257 .aio_write = generic_file_aio_write,
258 .mmap = generic_file_mmap,
259 .flush = yaffs_file_flush,
260 .fsync = yaffs_sync_object,
261 .sendfile = generic_file_sendfile,
266 static struct file_operations yaffs_file_operations = {
267 .read = generic_file_read,
268 .write = generic_file_write,
269 .mmap = generic_file_mmap,
270 .flush = yaffs_file_flush,
271 .fsync = yaffs_sync_object,
272 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
273 .sendfile = generic_file_sendfile,
278 static struct inode_operations yaffs_file_inode_operations = {
279 .setattr = yaffs_setattr,
282 static struct inode_operations yaffs_symlink_inode_operations = {
283 .readlink = yaffs_readlink,
284 .follow_link = yaffs_follow_link,
285 .setattr = yaffs_setattr,
288 static struct inode_operations yaffs_dir_inode_operations = {
289 .create = yaffs_create,
290 .lookup = yaffs_lookup,
292 .unlink = yaffs_unlink,
293 .symlink = yaffs_symlink,
294 .mkdir = yaffs_mkdir,
295 .rmdir = yaffs_unlink,
296 .mknod = yaffs_mknod,
297 .rename = yaffs_rename,
298 .setattr = yaffs_setattr,
301 static struct file_operations yaffs_dir_operations = {
302 .read = generic_read_dir,
303 .readdir = yaffs_readdir,
304 .fsync = yaffs_sync_object,
307 static struct super_operations yaffs_super_ops = {
308 .statfs = yaffs_statfs,
310 #ifndef YAFFS_USE_OWN_IGET
311 .read_inode = yaffs_read_inode,
313 #ifdef YAFFS_HAS_PUT_INODE
314 .put_inode = yaffs_put_inode,
316 .put_super = yaffs_put_super,
317 .delete_inode = yaffs_delete_inode,
318 .clear_inode = yaffs_clear_inode,
319 .sync_fs = yaffs_sync_fs,
320 .write_super = yaffs_write_super,
323 static void yaffs_GrossLock(yaffs_Device * dev)
325 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs locking\n"));
327 down(&dev->grossLock);
330 static void yaffs_GrossUnlock(yaffs_Device * dev)
332 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs unlocking\n"));
337 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
340 unsigned char *alias;
343 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
345 yaffs_GrossLock(dev);
347 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
349 yaffs_GrossUnlock(dev);
354 ret = vfs_readlink(dentry, buffer, buflen, alias);
359 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
360 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
362 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
365 unsigned char *alias;
367 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
369 yaffs_GrossLock(dev);
371 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
373 yaffs_GrossUnlock(dev);
381 ret = vfs_follow_link(nd, alias);
384 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
385 return ERR_PTR (ret);
391 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
395 * Lookup is used to find objects in the fs
397 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
399 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
402 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
406 struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
408 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
410 yaffs_GrossLock(dev);
413 (KERN_DEBUG "yaffs_lookup for %d:%s\n",
414 yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
417 yaffs_FindObjectByName(yaffs_InodeToObject(dir),
418 dentry->d_name.name);
420 obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
422 /* Can't hold gross lock when calling yaffs_get_inode() */
423 yaffs_GrossUnlock(dev);
427 (KERN_DEBUG "yaffs_lookup found %d\n", obj->objectId));
429 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
433 (KERN_DEBUG "yaffs_loookup dentry \n"));
434 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
435 * d_add even if NULL inode */
437 /*dget(dentry); // try to solve directory bug */
438 d_add(dentry, inode);
446 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_lookup not found\n"));
450 /* added NCB for 2.5/6 compatability - forces add even if inode is
451 * NULL which creates dentry hash */
452 d_add(dentry, inode);
455 /* return (ERR_PTR(-EIO)); */
460 #ifdef YAFFS_HAS_PUT_INODE
462 /* For now put inode is just for debugging
463 * Put inode is called when the inode **structure** is put.
465 static void yaffs_put_inode(struct inode *inode)
468 ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
469 atomic_read(&inode->i_count)));
474 /* clear is called to tell the fs to release any per-inode data it holds */
475 static void yaffs_clear_inode(struct inode *inode)
480 obj = yaffs_InodeToObject(inode);
483 ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
484 atomic_read(&inode->i_count),
485 obj ? "object exists" : "null object"));
489 yaffs_GrossLock(dev);
491 /* Clear the association between the inode and
495 yaffs_InodeToObjectLV(inode) = NULL;
497 /* If the object freeing was deferred, then the real
499 * This should fix the inode inconsistency problem.
502 yaffs_HandleDeferedFree(obj);
504 yaffs_GrossUnlock(dev);
509 /* delete is called when the link count is zero and the inode
510 * is put (ie. nobody wants to know about it anymore, time to
512 * NB Must call clear_inode()
514 static void yaffs_delete_inode(struct inode *inode)
516 yaffs_Object *obj = yaffs_InodeToObject(inode);
520 ("yaffs_delete_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);
527 yaffs_DeleteFile(obj);
528 yaffs_GrossUnlock(dev);
530 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
531 truncate_inode_pages (&inode->i_data, 0);
536 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
537 static int yaffs_file_flush(struct file *file, fl_owner_t id)
539 static int yaffs_file_flush(struct file *file)
542 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
544 yaffs_Device *dev = obj->myDev;
547 (KERN_DEBUG "yaffs_file_flush object %d (%s)\n", obj->objectId,
548 obj->dirty ? "dirty" : "clean"));
550 yaffs_GrossLock(dev);
552 yaffs_FlushFile(obj, 1);
554 yaffs_GrossUnlock(dev);
559 static int yaffs_readpage_nolock(struct file *f, struct page *pg)
561 /* Lifted from jffs2 */
564 unsigned char *pg_buf;
569 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage at %08x, size %08x\n",
570 (unsigned)(pg->index << PAGE_CACHE_SHIFT),
571 (unsigned)PAGE_CACHE_SIZE));
573 obj = yaffs_DentryToObject(f->f_dentry);
577 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
578 BUG_ON(!PageLocked(pg));
585 /* FIXME: Can kmap fail? */
587 yaffs_GrossLock(dev);
590 yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT,
593 yaffs_GrossUnlock(dev);
599 ClearPageUptodate(pg);
606 flush_dcache_page(pg);
609 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage done\n"));
613 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
615 int ret = yaffs_readpage_nolock(f, pg);
620 static int yaffs_readpage(struct file *f, struct page *pg)
622 return yaffs_readpage_unlock(f, pg);
625 /* writepage inspired by/stolen from smbfs */
627 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
628 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
630 static int yaffs_writepage(struct page *page)
633 struct address_space *mapping = page->mapping;
634 loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
636 unsigned long end_index;
644 inode = mapping->host;
648 if (offset > inode->i_size) {
651 "yaffs_writepage at %08x, inode size = %08x!!!\n",
652 (unsigned)(page->index << PAGE_CACHE_SHIFT),
653 (unsigned)inode->i_size));
655 (KERN_DEBUG " -> don't care!!\n"));
660 end_index = inode->i_size >> PAGE_CACHE_SHIFT;
663 if (page->index < end_index) {
664 nBytes = PAGE_CACHE_SIZE;
666 nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
673 obj = yaffs_InodeToObject(inode);
674 yaffs_GrossLock(obj->myDev);
677 (KERN_DEBUG "yaffs_writepage at %08x, size %08x\n",
678 (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
680 (KERN_DEBUG "writepag0: obj = %05x, ino = %05x\n",
681 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
684 yaffs_WriteDataToFile(obj, buffer, page->index << PAGE_CACHE_SHIFT,
688 (KERN_DEBUG "writepag1: obj = %05x, ino = %05x\n",
689 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
691 yaffs_GrossUnlock(obj->myDev);
694 SetPageUptodate(page);
698 return (nWritten == nBytes) ? 0 : -ENOSPC;
701 static int yaffs_prepare_write(struct file *f, struct page *pg,
702 unsigned offset, unsigned to)
705 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_prepair_write\n"));
706 if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
707 return yaffs_readpage_nolock(f, pg);
713 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
717 void *addr = page_address(pg) + offset;
718 loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
719 int nBytes = to - offset;
723 unsigned saddr = (unsigned)addr;
726 (KERN_DEBUG "yaffs_commit_write addr %x pos %x nBytes %d\n", saddr,
729 nWritten = yaffs_file_write(f, addr, nBytes, &pos);
731 if (nWritten != nBytes) {
734 "yaffs_commit_write not same size nWritten %d nBytes %d\n",
737 ClearPageUptodate(pg);
743 (KERN_DEBUG "yaffs_commit_write returning %d\n",
744 nWritten == nBytes ? 0 : nWritten));
746 return nWritten == nBytes ? 0 : nWritten;
750 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
755 /* Check mode against the variant type and attempt to repair if broken. */
756 __u32 mode = obj->yst_mode;
757 switch( obj->variantType ){
758 case YAFFS_OBJECT_TYPE_FILE :
759 if( ! S_ISREG(mode) ){
760 obj->yst_mode &= ~S_IFMT;
761 obj->yst_mode |= S_IFREG;
765 case YAFFS_OBJECT_TYPE_SYMLINK :
766 if( ! S_ISLNK(mode) ){
767 obj->yst_mode &= ~S_IFMT;
768 obj->yst_mode |= S_IFLNK;
772 case YAFFS_OBJECT_TYPE_DIRECTORY :
773 if( ! S_ISDIR(mode) ){
774 obj->yst_mode &= ~S_IFMT;
775 obj->yst_mode |= S_IFDIR;
779 case YAFFS_OBJECT_TYPE_UNKNOWN :
780 case YAFFS_OBJECT_TYPE_HARDLINK :
781 case YAFFS_OBJECT_TYPE_SPECIAL :
787 inode->i_flags |= S_NOATIME;
789 inode->i_ino = obj->objectId;
790 inode->i_mode = obj->yst_mode;
791 inode->i_uid = obj->yst_uid;
792 inode->i_gid = obj->yst_gid;
793 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
794 inode->i_blksize = inode->i_sb->s_blocksize;
796 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
798 inode->i_rdev = old_decode_dev(obj->yst_rdev);
799 inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
800 inode->i_atime.tv_nsec = 0;
801 inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
802 inode->i_mtime.tv_nsec = 0;
803 inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
804 inode->i_ctime.tv_nsec = 0;
806 inode->i_rdev = obj->yst_rdev;
807 inode->i_atime = obj->yst_atime;
808 inode->i_mtime = obj->yst_mtime;
809 inode->i_ctime = obj->yst_ctime;
811 inode->i_size = yaffs_GetObjectFileLength(obj);
812 inode->i_blocks = (inode->i_size + 511) >> 9;
814 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
818 "yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
819 inode->i_mode, inode->i_uid, inode->i_gid,
820 (int)inode->i_size, atomic_read(&inode->i_count)));
822 switch (obj->yst_mode & S_IFMT) {
823 default: /* fifo, device or socket */
824 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
825 init_special_inode(inode, obj->yst_mode,
826 old_decode_dev(obj->yst_rdev));
828 init_special_inode(inode, obj->yst_mode,
829 (dev_t) (obj->yst_rdev));
832 case S_IFREG: /* file */
833 inode->i_op = &yaffs_file_inode_operations;
834 inode->i_fop = &yaffs_file_operations;
835 inode->i_mapping->a_ops =
836 &yaffs_file_address_operations;
838 case S_IFDIR: /* directory */
839 inode->i_op = &yaffs_dir_inode_operations;
840 inode->i_fop = &yaffs_dir_operations;
842 case S_IFLNK: /* symlink */
843 inode->i_op = &yaffs_symlink_inode_operations;
847 yaffs_InodeToObjectLV(inode) = obj;
849 obj->myInode = inode;
853 (KERN_DEBUG "yaffs_FileInode invalid parameters\n"));
858 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
865 (KERN_DEBUG "yaffs_get_inode for NULL super_block!!\n"));
872 (KERN_DEBUG "yaffs_get_inode for NULL object!!\n"));
878 (KERN_DEBUG "yaffs_get_inode for object %d\n", obj->objectId));
880 inode = Y_IGET(sb, obj->objectId);
884 /* NB Side effect: iget calls back to yaffs_read_inode(). */
885 /* iget also increments the inode's i_count */
886 /* NB You can't be holding grossLock or deadlock will happen! */
891 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
899 obj = yaffs_DentryToObject(f->f_dentry);
903 yaffs_GrossLock(dev);
905 inode = f->f_dentry->d_inode;
907 if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) {
908 ipos = inode->i_size;
915 (KERN_DEBUG "yaffs_file_write: hey obj is null!\n"));
919 "yaffs_file_write about to write writing %d bytes"
920 "to object %d at %d\n",
921 n, obj->objectId, ipos));
924 nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
927 (KERN_DEBUG "yaffs_file_write writing %d bytes, %d written at %d\n",
932 if (ipos > inode->i_size) {
933 inode->i_size = ipos;
934 inode->i_blocks = (ipos + 511) >> 9;
938 "yaffs_file_write size updated to %d bytes, "
940 ipos, (int)(inode->i_blocks)));
944 yaffs_GrossUnlock(dev);
945 return nWritten == 0 ? -ENOSPC : nWritten;
948 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
952 struct inode *inode = f->f_dentry->d_inode;
953 unsigned long offset, curoffs;
954 struct ylist_head *i;
957 char name[YAFFS_MAX_NAME_LENGTH + 1];
959 obj = yaffs_DentryToObject(f->f_dentry);
962 yaffs_GrossLock(dev);
966 T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
970 (KERN_DEBUG "yaffs_readdir: entry . ino %d \n",
972 if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR)
981 (KERN_DEBUG "yaffs_readdir: entry .. ino %d \n",
982 (int)f->f_dentry->d_parent->d_inode->i_ino));
984 (dirent, "..", 2, offset,
985 f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
994 /* If the directory has changed since the open or last call to
995 readdir, rewind to after the 2 canned entries. */
997 if (f->f_version != inode->i_version) {
1000 f->f_version = inode->i_version;
1003 ylist_for_each(i, &obj->variant.directoryVariant.children) {
1005 if (curoffs >= offset) {
1006 l = ylist_entry(i, yaffs_Object, siblings);
1008 yaffs_GetObjectName(l, name,
1009 YAFFS_MAX_NAME_LENGTH + 1);
1011 (KERN_DEBUG "yaffs_readdir: %s inode %d\n", name,
1012 yaffs_GetObjectInode(l)));
1018 yaffs_GetObjectInode(l),
1019 yaffs_GetObjectType(l))
1032 yaffs_GrossUnlock(dev);
1038 * File creation. Allocate an inode, and we're done..
1040 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1041 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1044 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1048 struct inode *inode;
1050 yaffs_Object *obj = NULL;
1053 yaffs_Object *parent = yaffs_InodeToObject(dir);
1055 int error = -ENOSPC;
1056 uid_t uid = current->fsuid;
1057 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
1059 if((dir->i_mode & S_ISGID) && S_ISDIR(mode))
1064 (KERN_DEBUG "yaffs_mknod: parent object %d type %d\n",
1065 parent->objectId, parent->variantType));
1068 (KERN_DEBUG "yaffs_mknod: could not get parent object\n"));
1072 T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
1074 dentry->d_name.name, mode, rdev));
1076 dev = parent->myDev;
1078 yaffs_GrossLock(dev);
1080 switch (mode & S_IFMT) {
1082 /* Special (socket, fifo, device...) */
1083 T(YAFFS_TRACE_OS, (KERN_DEBUG
1084 "yaffs_mknod: making special\n"));
1085 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1087 yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1088 gid, old_encode_dev(rdev));
1091 yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1095 case S_IFREG: /* file */
1096 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
1098 yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
1101 case S_IFDIR: /* directory */
1103 (KERN_DEBUG "yaffs_mknod: making directory\n"));
1105 yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
1108 case S_IFLNK: /* symlink */
1109 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
1110 obj = NULL; /* Do we ever get here? */
1114 /* Can not call yaffs_get_inode() with gross lock held */
1115 yaffs_GrossUnlock(dev);
1118 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
1119 d_instantiate(dentry, inode);
1121 (KERN_DEBUG "yaffs_mknod created object %d count = %d\n",
1122 obj->objectId, atomic_read(&inode->i_count)));
1126 (KERN_DEBUG "yaffs_mknod failed making object\n"));
1133 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1136 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mkdir\n"));
1137 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
1139 /* attempt to fix dir bug - didn't work */
1147 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1148 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
1149 struct nameidata *n)
1151 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
1154 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_create\n"));
1155 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
1158 static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
1165 (KERN_DEBUG "yaffs_unlink %d:%s\n", (int)(dir->i_ino),
1166 dentry->d_name.name));
1168 dev = yaffs_InodeToObject(dir)->myDev;
1170 yaffs_GrossLock(dev);
1172 retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
1174 if (retVal == YAFFS_OK) {
1175 dentry->d_inode->i_nlink--;
1177 yaffs_GrossUnlock(dev);
1178 mark_inode_dirty(dentry->d_inode);
1181 yaffs_GrossUnlock(dev);
1188 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
1189 struct dentry *dentry)
1191 struct inode *inode = old_dentry->d_inode;
1192 yaffs_Object *obj = NULL;
1193 yaffs_Object *link = NULL;
1196 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_link\n"));
1198 obj = yaffs_InodeToObject(inode);
1201 yaffs_GrossLock(dev);
1203 if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
1206 yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
1211 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1212 d_instantiate(dentry, old_dentry->d_inode);
1213 atomic_inc(&old_dentry->d_inode->i_count);
1215 (KERN_DEBUG "yaffs_link link count %d i_count %d\n",
1216 old_dentry->d_inode->i_nlink,
1217 atomic_read(&old_dentry->d_inode->i_count)));
1221 yaffs_GrossUnlock(dev);
1231 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
1232 const char *symname)
1236 uid_t uid = current->fsuid;
1237 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
1239 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_symlink\n"));
1241 dev = yaffs_InodeToObject(dir)->myDev;
1242 yaffs_GrossLock(dev);
1243 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1244 S_IFLNK | S_IRWXUGO, uid, gid, symname);
1245 yaffs_GrossUnlock(dev);
1249 struct inode *inode;
1251 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1252 d_instantiate(dentry, inode);
1253 T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink created OK\n"));
1256 T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink not created\n"));
1263 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
1270 obj = yaffs_DentryToObject(dentry);
1274 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_object\n"));
1275 yaffs_GrossLock(dev);
1276 yaffs_FlushFile(obj, 1);
1277 yaffs_GrossUnlock(dev);
1282 * The VFS layer already does all the dentry stuff for rename.
1284 * NB: POSIX says you can rename an object over an old object of the same name
1286 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
1287 struct inode *new_dir, struct dentry *new_dentry)
1290 int retVal = YAFFS_FAIL;
1291 yaffs_Object *target;
1293 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_rename\n"));
1294 dev = yaffs_InodeToObject(old_dir)->myDev;
1296 yaffs_GrossLock(dev);
1298 /* Check if the target is an existing directory that is not empty. */
1300 yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
1301 new_dentry->d_name.name);
1306 target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1307 !ylist_empty(&target->variant.directoryVariant.children)) {
1309 T(YAFFS_TRACE_OS, (KERN_DEBUG "target is non-empty dir\n"));
1311 retVal = YAFFS_FAIL;
1314 /* Now does unlinking internally using shadowing mechanism */
1315 T(YAFFS_TRACE_OS, (KERN_DEBUG "calling yaffs_RenameObject\n"));
1318 yaffs_RenameObject(yaffs_InodeToObject(old_dir),
1319 old_dentry->d_name.name,
1320 yaffs_InodeToObject(new_dir),
1321 new_dentry->d_name.name);
1324 yaffs_GrossUnlock(dev);
1326 if (retVal == YAFFS_OK) {
1328 new_dentry->d_inode->i_nlink--;
1329 mark_inode_dirty(new_dentry->d_inode);
1339 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1341 struct inode *inode = dentry->d_inode;
1346 (KERN_DEBUG "yaffs_setattr of object %d\n",
1347 yaffs_InodeToObject(inode)->objectId));
1349 if ((error = inode_change_ok(inode, attr)) == 0) {
1351 dev = yaffs_InodeToObject(inode)->myDev;
1352 yaffs_GrossLock(dev);
1353 if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
1359 yaffs_GrossUnlock(dev);
1361 error = inode_setattr(inode, attr);
1366 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1367 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
1369 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
1370 struct super_block *sb = dentry->d_sb;
1371 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1372 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1374 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1376 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1378 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1381 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_statfs\n"));
1383 yaffs_GrossLock(dev);
1385 buf->f_type = YAFFS_MAGIC;
1386 buf->f_bsize = sb->s_blocksize;
1387 buf->f_namelen = 255;
1389 if(dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)){
1390 /* Do this if chunk size is not a power of 2 */
1392 uint64_t bytesInDev;
1395 bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock +1))) *
1396 ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
1398 do_div(bytesInDev,sb->s_blocksize); /* bytesInDev becomes the number of blocks */
1399 buf->f_blocks = bytesInDev;
1401 bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
1402 ((uint64_t)(dev->nDataBytesPerChunk));
1404 do_div(bytesFree,sb->s_blocksize);
1406 buf->f_bfree = bytesFree;
1408 } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
1411 (dev->endBlock - dev->startBlock + 1) *
1412 dev->nChunksPerBlock /
1413 (sb->s_blocksize / dev->nDataBytesPerChunk);
1415 yaffs_GetNumberOfFreeChunks(dev) /
1416 (sb->s_blocksize / dev->nDataBytesPerChunk);
1419 (dev->endBlock - dev->startBlock + 1) *
1420 dev->nChunksPerBlock *
1421 (dev->nDataBytesPerChunk / sb->s_blocksize);
1424 yaffs_GetNumberOfFreeChunks(dev) *
1425 (dev->nDataBytesPerChunk / sb->s_blocksize);
1431 buf->f_bavail = buf->f_bfree;
1433 yaffs_GrossUnlock(dev);
1438 static int yaffs_do_sync_fs(struct super_block *sb)
1441 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1442 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_do_sync_fs\n"));
1445 yaffs_GrossLock(dev);
1448 yaffs_FlushEntireDeviceCache(dev);
1449 yaffs_CheckpointSave(dev);
1452 yaffs_GrossUnlock(dev);
1460 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1461 static void yaffs_write_super(struct super_block *sb)
1463 static int yaffs_write_super(struct super_block *sb)
1467 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_super\n"));
1468 yaffs_do_sync_fs(sb);
1469 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
1475 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1476 static int yaffs_sync_fs(struct super_block *sb, int wait)
1478 static int yaffs_sync_fs(struct super_block *sb)
1482 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_fs\n"));
1484 yaffs_do_sync_fs(sb);
1490 #ifdef YAFFS_USE_OWN_IGET
1492 static struct inode * yaffs_iget(struct super_block *sb, unsigned long ino)
1494 struct inode *inode;
1496 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1499 (KERN_DEBUG "yaffs_iget for %lu\n", ino));
1501 inode = iget_locked(sb, ino);
1503 return ERR_PTR(-ENOMEM);
1504 if (!(inode->i_state & I_NEW))
1507 /* NB This is called as a side effect of other functions, but
1508 * we had to release the lock to prevent deadlocks, so
1509 * need to lock again.
1512 yaffs_GrossLock(dev);
1514 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
1516 yaffs_FillInodeFromObject(inode, obj);
1518 yaffs_GrossUnlock(dev);
1520 unlock_new_inode(inode);
1526 static void yaffs_read_inode(struct inode *inode)
1528 /* NB This is called as a side effect of other functions, but
1529 * we had to release the lock to prevent deadlocks, so
1530 * need to lock again.
1534 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
1537 (KERN_DEBUG "yaffs_read_inode for %d\n", (int)inode->i_ino));
1539 yaffs_GrossLock(dev);
1541 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
1543 yaffs_FillInodeFromObject(inode, obj);
1545 yaffs_GrossUnlock(dev);
1550 static YLIST_HEAD(yaffs_dev_list);
1553 static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
1555 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1557 if( *flags & MS_RDONLY ) {
1558 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1561 (KERN_DEBUG "yaffs_remount_fs: %s: RO\n", dev->name ));
1563 yaffs_GrossLock(dev);
1565 yaffs_FlushEntireDeviceCache(dev);
1567 yaffs_CheckpointSave(dev);
1572 yaffs_GrossUnlock(dev);
1576 (KERN_DEBUG "yaffs_remount_fs: %s: RW\n", dev->name ));
1583 static void yaffs_put_super(struct super_block *sb)
1585 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1587 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_put_super\n"));
1589 yaffs_GrossLock(dev);
1591 yaffs_FlushEntireDeviceCache(dev);
1593 yaffs_CheckpointSave(dev);
1595 if (dev->putSuperFunc) {
1596 dev->putSuperFunc(sb);
1599 yaffs_Deinitialise(dev);
1601 yaffs_GrossUnlock(dev);
1603 /* we assume this is protected by lock_kernel() in mount/umount */
1604 ylist_del(&dev->devList);
1606 if(dev->spareBuffer){
1607 YFREE(dev->spareBuffer);
1608 dev->spareBuffer = NULL;
1615 static void yaffs_MTDPutSuper(struct super_block *sb)
1618 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1624 put_mtd_device(mtd);
1628 static void yaffs_MarkSuperBlockDirty(void *vsb)
1630 struct super_block *sb = (struct super_block *)vsb;
1632 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_MarkSuperBlockDirty() sb = %p\n",sb));
1639 int skip_checkpoint_read;
1640 int skip_checkpoint_write;
1644 #define MAX_OPT_LEN 20
1645 static int yaffs_parse_options(yaffs_options *options, const char *options_str)
1647 char cur_opt[MAX_OPT_LEN+1];
1651 /* Parse through the options which is a comma seperated list */
1653 while(options_str && *options_str && !error){
1654 memset(cur_opt,0,MAX_OPT_LEN+1);
1657 while(*options_str && *options_str != ','){
1658 if(p < MAX_OPT_LEN){
1659 cur_opt[p] = *options_str;
1665 if(!strcmp(cur_opt,"inband-tags"))
1666 options->inband_tags = 1;
1667 else if(!strcmp(cur_opt,"no-cache"))
1668 options->no_cache = 1;
1669 else if(!strcmp(cur_opt,"no-checkpoint-read"))
1670 options->skip_checkpoint_read = 1;
1671 else if(!strcmp(cur_opt,"no-checkpoint-write"))
1672 options->skip_checkpoint_write = 1;
1673 else if(!strcmp(cur_opt,"no-checkpoint")){
1674 options->skip_checkpoint_read = 1;
1675 options->skip_checkpoint_write = 1;
1677 printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",cur_opt);
1686 static struct super_block *yaffs_internal_read_super(int yaffsVersion,
1687 struct super_block *sb,
1688 void *data, int silent)
1691 struct inode *inode = NULL;
1692 struct dentry *root;
1693 yaffs_Device *dev = 0;
1694 char devname_buf[BDEVNAME_SIZE + 1];
1695 struct mtd_info *mtd;
1697 char *data_str = (char *)data;
1699 yaffs_options options;
1701 sb->s_magic = YAFFS_MAGIC;
1702 sb->s_op = &yaffs_super_ops;
1703 sb->s_flags |= MS_NOATIME;
1706 printk(KERN_INFO "yaffs: sb is NULL\n");
1707 else if (!sb->s_dev)
1708 printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
1709 else if (!yaffs_devname(sb, devname_buf))
1710 printk(KERN_INFO "yaffs: devname is NULL\n");
1712 printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
1714 yaffs_devname(sb, devname_buf));
1719 printk(KERN_INFO "yaffs: passed flags \"%s\"\n",data_str);
1721 memset(&options,0,sizeof(options));
1723 if(yaffs_parse_options(&options,data_str)){
1724 /* Option parsing failed */
1729 sb->s_blocksize = PAGE_CACHE_SIZE;
1730 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
1731 T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
1733 ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
1735 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
1737 ("yaffs: Write verification disabled. All guarantees "
1738 "null and void\n"));
1741 T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
1743 MAJOR(sb->s_dev), MINOR(sb->s_dev),
1744 yaffs_devname(sb, devname_buf)));
1746 /* Check it's an mtd device..... */
1747 if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) {
1748 return NULL; /* This isn't an mtd device */
1750 /* Get the device */
1751 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
1753 T(YAFFS_TRACE_ALWAYS,
1754 ("yaffs: MTD device #%u doesn't appear to exist\n",
1758 /* Check it's NAND */
1759 if (mtd->type != MTD_NANDFLASH) {
1760 T(YAFFS_TRACE_ALWAYS,
1761 ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
1765 T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
1766 T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
1767 T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
1768 T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
1769 T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
1770 T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
1771 T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
1772 T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
1773 T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
1774 T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
1775 T(YAFFS_TRACE_OS, (" size %d\n", mtd->size));
1777 #ifdef CONFIG_YAFFS_AUTO_YAFFS2
1779 if (yaffsVersion == 1 &&
1780 WRITE_SIZE(mtd) >= 2048) {
1781 T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs2\n"));
1785 /* Added NCB 26/5/2006 for completeness */
1786 if (yaffsVersion == 2 &&
1787 !options.inband_tags &&
1788 WRITE_SIZE(mtd) == 512){
1789 T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs1\n"));
1795 if (yaffsVersion == 2) {
1796 /* Check for version 2 style functions */
1798 !mtd->block_isbad ||
1799 !mtd->block_markbad ||
1802 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1803 !mtd->read_oob || !mtd->write_oob) {
1806 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1808 T(YAFFS_TRACE_ALWAYS,
1809 ("yaffs: MTD device does not support required "
1814 if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
1815 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
1816 !options.inband_tags) {
1817 T(YAFFS_TRACE_ALWAYS,
1818 ("yaffs: MTD device does not have the "
1819 "right page sizes\n"));
1823 /* Check for V1 style functions */
1827 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1828 !mtd->read_oob || !mtd->write_oob) {
1831 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1833 T(YAFFS_TRACE_ALWAYS,
1834 ("yaffs: MTD device does not support required "
1839 if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
1840 mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
1841 T(YAFFS_TRACE_ALWAYS,
1842 ("yaffs: MTD device does not support have the "
1843 "right page sizes\n"));
1848 /* OK, so if we got here, we have an MTD that's NAND and looks
1849 * like it has the right capabilities
1850 * Set the yaffs_Device up for mtd
1853 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1854 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
1856 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
1859 /* Deep shit could not allocate device structure */
1860 T(YAFFS_TRACE_ALWAYS,
1861 ("yaffs_read_super: Failed trying to allocate "
1862 "yaffs_Device. \n"));
1866 memset(dev, 0, sizeof(yaffs_Device));
1867 dev->genericDevice = mtd;
1868 dev->name = mtd->name;
1870 /* Set up the memory size parameters.... */
1872 nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1873 dev->startBlock = 0;
1874 dev->endBlock = nBlocks - 1;
1875 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1876 dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1877 dev->nReservedBlocks = 5;
1878 dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
1879 dev->inbandTags = options.inband_tags;
1881 /* ... and the functions. */
1882 if (yaffsVersion == 2) {
1883 dev->writeChunkWithTagsToNAND =
1884 nandmtd2_WriteChunkWithTagsToNAND;
1885 dev->readChunkWithTagsFromNAND =
1886 nandmtd2_ReadChunkWithTagsFromNAND;
1887 dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
1888 dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
1889 dev->spareBuffer = YMALLOC(mtd->oobsize);
1891 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1892 dev->totalBytesPerChunk = mtd->writesize;
1893 dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
1895 dev->totalBytesPerChunk = mtd->oobblock;
1896 dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
1898 nBlocks = mtd->size / mtd->erasesize;
1900 dev->startBlock = 0;
1901 dev->endBlock = nBlocks - 1;
1903 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1904 /* use the MTD interface in yaffs_mtdif1.c */
1905 dev->writeChunkWithTagsToNAND =
1906 nandmtd1_WriteChunkWithTagsToNAND;
1907 dev->readChunkWithTagsFromNAND =
1908 nandmtd1_ReadChunkWithTagsFromNAND;
1909 dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
1910 dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
1912 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
1913 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
1917 /* ... and common functions */
1918 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
1919 dev->initialiseNAND = nandmtd_InitialiseNAND;
1921 dev->putSuperFunc = yaffs_MTDPutSuper;
1923 dev->superBlock = (void *)sb;
1924 dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
1927 #ifndef CONFIG_YAFFS_DOES_ECC
1928 dev->useNANDECC = 1;
1931 #ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
1932 dev->wideTnodesDisabled = 1;
1935 dev->skipCheckpointRead = options.skip_checkpoint_read;
1936 dev->skipCheckpointWrite = options.skip_checkpoint_write;
1938 /* we assume this is protected by lock_kernel() in mount/umount */
1939 ylist_add_tail(&dev->devList, &yaffs_dev_list);
1941 init_MUTEX(&dev->grossLock);
1943 yaffs_GrossLock(dev);
1945 err = yaffs_GutsInitialise(dev);
1948 ("yaffs_read_super: guts initialised %s\n",
1949 (err == YAFFS_OK) ? "OK" : "FAILED"));
1951 /* Release lock before yaffs_get_inode() */
1952 yaffs_GrossUnlock(dev);
1954 /* Create root inode */
1955 if (err == YAFFS_OK)
1956 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
1962 inode->i_op = &yaffs_dir_inode_operations;
1963 inode->i_fop = &yaffs_dir_operations;
1965 T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
1967 root = d_alloc_root(inode);
1969 T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
1977 T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
1982 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1983 static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
1986 return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
1989 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1990 static int yaffs_read_super(struct file_system_type *fs,
1991 int flags, const char *dev_name,
1992 void *data, struct vfsmount *mnt)
1995 return get_sb_bdev(fs, flags, dev_name, data,
1996 yaffs_internal_read_super_mtd, mnt);
1999 static struct super_block *yaffs_read_super(struct file_system_type *fs,
2000 int flags, const char *dev_name,
2004 return get_sb_bdev(fs, flags, dev_name, data,
2005 yaffs_internal_read_super_mtd);
2009 static struct file_system_type yaffs_fs_type = {
2010 .owner = THIS_MODULE,
2012 .get_sb = yaffs_read_super,
2013 .kill_sb = kill_block_super,
2014 .fs_flags = FS_REQUIRES_DEV,
2017 static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
2020 return yaffs_internal_read_super(1, sb, data, silent);
2023 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
2028 #ifdef CONFIG_YAFFS_YAFFS2
2030 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
2031 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
2034 return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
2037 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
2038 static int yaffs2_read_super(struct file_system_type *fs,
2039 int flags, const char *dev_name, void *data,
2040 struct vfsmount *mnt)
2042 return get_sb_bdev(fs, flags, dev_name, data,
2043 yaffs2_internal_read_super_mtd, mnt);
2046 static struct super_block *yaffs2_read_super(struct file_system_type *fs,
2047 int flags, const char *dev_name,
2051 return get_sb_bdev(fs, flags, dev_name, data,
2052 yaffs2_internal_read_super_mtd);
2056 static struct file_system_type yaffs2_fs_type = {
2057 .owner = THIS_MODULE,
2059 .get_sb = yaffs2_read_super,
2060 .kill_sb = kill_block_super,
2061 .fs_flags = FS_REQUIRES_DEV,
2064 static struct super_block *yaffs2_read_super(struct super_block *sb,
2065 void *data, int silent)
2067 return yaffs_internal_read_super(2, sb, data, silent);
2070 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
2074 #endif /* CONFIG_YAFFS_YAFFS2 */
2076 static struct proc_dir_entry *my_proc_entry;
2078 static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
2080 buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
2081 buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
2082 buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
2083 buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
2084 buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
2085 buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
2086 buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
2087 buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
2088 buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
2089 buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
2090 buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
2091 buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
2092 buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
2093 buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
2094 buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
2095 buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
2096 buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
2097 buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
2098 buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
2099 buf += sprintf(buf, "passiveGCs......... %d\n",
2100 dev->passiveGarbageCollections);
2101 buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
2102 buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
2103 buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
2104 buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
2105 buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
2106 buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
2107 buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
2108 buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
2109 buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
2110 buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
2112 sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
2113 buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
2114 buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
2115 buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
2120 static int yaffs_proc_read(char *page,
2122 off_t offset, int count, int *eof, void *data)
2124 struct ylist_head *item;
2129 /* Get proc_file_read() to step 'offset' by one on each sucessive call.
2130 * We use 'offset' (*ppos) to indicate where we are in devList.
2131 * This also assumes the user has posted a read buffer large
2132 * enough to hold the complete output; but that's life in /proc.
2137 /* Print header first */
2139 buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
2140 "\n%s\n%s\n", yaffs_fs_c_version,
2141 yaffs_guts_c_version);
2144 /* hold lock_kernel while traversing yaffs_dev_list */
2147 /* Locate and print the Nth entry. Order N-squared but N is small. */
2148 ylist_for_each(item, &yaffs_dev_list) {
2149 yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
2154 buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
2155 buf = yaffs_dump_dev(buf, dev);
2160 return buf - page < count ? buf - page : count;
2164 * Set the verbosity of the warnings and error messages.
2166 * Note that the names can only be a..z or _ with the current code.
2171 unsigned mask_bitfield;
2173 {"allocate", YAFFS_TRACE_ALLOCATE},
2174 {"always", YAFFS_TRACE_ALWAYS},
2175 {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
2176 {"buffers", YAFFS_TRACE_BUFFERS},
2177 {"bug", YAFFS_TRACE_BUG},
2178 {"checkpt", YAFFS_TRACE_CHECKPOINT},
2179 {"deletion", YAFFS_TRACE_DELETION},
2180 {"erase", YAFFS_TRACE_ERASE},
2181 {"error", YAFFS_TRACE_ERROR},
2182 {"gc_detail", YAFFS_TRACE_GC_DETAIL},
2183 {"gc", YAFFS_TRACE_GC},
2184 {"mtd", YAFFS_TRACE_MTD},
2185 {"nandaccess", YAFFS_TRACE_NANDACCESS},
2186 {"os", YAFFS_TRACE_OS},
2187 {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
2188 {"scan", YAFFS_TRACE_SCAN},
2189 {"tracing", YAFFS_TRACE_TRACING},
2191 {"verify", YAFFS_TRACE_VERIFY},
2192 {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
2193 {"verify_full", YAFFS_TRACE_VERIFY_FULL},
2194 {"verify_all", YAFFS_TRACE_VERIFY_ALL},
2196 {"write", YAFFS_TRACE_WRITE},
2197 {"all", 0xffffffff},
2202 #define MAX_MASK_NAME_LENGTH 40
2203 static int yaffs_proc_write(struct file *file, const char *buf,
2204 unsigned long count, void *data)
2206 unsigned rg = 0, mask_bitfield;
2210 char substring[MAX_MASK_NAME_LENGTH+1];
2216 rg = yaffs_traceMask;
2218 while (!done && (pos < count)) {
2220 while ((pos < count) && isspace(buf[pos])) {
2238 mask_bitfield = simple_strtoul(buf + pos, &end, 0);
2239 if (end > buf + pos) {
2240 mask_name = "numeral";
2241 len = end - (buf + pos);
2245 for(x = buf + pos, i = 0;
2246 (*x == '_' || (*x >='a' && *x <= 'z')) &&
2247 i <MAX_MASK_NAME_LENGTH; x++, i++, pos++)
2249 substring[i] = '\0';
2251 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2252 if(strcmp(substring,mask_flags[i].mask_name) == 0){
2253 mask_name = mask_flags[i].mask_name;
2254 mask_bitfield = mask_flags[i].mask_bitfield;
2261 if (mask_name != NULL) {
2265 rg &= ~mask_bitfield;
2268 rg |= mask_bitfield;
2274 rg |= mask_bitfield;
2280 yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
2282 printk("new trace = 0x%08X\n",yaffs_traceMask);
2284 if (rg & YAFFS_TRACE_ALWAYS) {
2285 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2287 flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
2288 printk("%c%s\n", flag, mask_flags[i].mask_name);
2295 /* Stuff to handle installation of file systems */
2296 struct file_system_to_install {
2297 struct file_system_type *fst;
2301 static struct file_system_to_install fs_to_install[] = {
2302 //#ifdef CONFIG_YAFFS_YAFFS1
2303 {&yaffs_fs_type, 0},
2305 //#ifdef CONFIG_YAFFS_YAFFS2
2306 {&yaffs2_fs_type, 0},
2311 static int __init init_yaffs_fs(void)
2314 struct file_system_to_install *fsinst;
2316 T(YAFFS_TRACE_ALWAYS,
2317 ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
2319 /* Install the proc_fs entry */
2320 my_proc_entry = create_proc_entry("yaffs",
2324 if (my_proc_entry) {
2325 my_proc_entry->write_proc = yaffs_proc_write;
2326 my_proc_entry->read_proc = yaffs_proc_read;
2327 my_proc_entry->data = NULL;
2332 /* Now add the file system entries */
2334 fsinst = fs_to_install;
2336 while (fsinst->fst && !error) {
2337 error = register_filesystem(fsinst->fst);
2339 fsinst->installed = 1;
2344 /* Any errors? uninstall */
2346 fsinst = fs_to_install;
2348 while (fsinst->fst) {
2349 if (fsinst->installed) {
2350 unregister_filesystem(fsinst->fst);
2351 fsinst->installed = 0;
2360 static void __exit exit_yaffs_fs(void)
2363 struct file_system_to_install *fsinst;
2365 T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
2368 remove_proc_entry("yaffs", YPROC_ROOT);
2370 fsinst = fs_to_install;
2372 while (fsinst->fst) {
2373 if (fsinst->installed) {
2374 unregister_filesystem(fsinst->fst);
2375 fsinst->installed = 0;
2382 module_init(init_yaffs_fs)
2383 module_exit(exit_yaffs_fs)
2385 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
2386 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
2387 MODULE_LICENSE("GPL");