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 1.66 2008-05-05 07:58:58 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>
46 #include <linux/list.h>
48 #include <linux/proc_fs.h>
49 #include <linux/smp_lock.h>
50 #include <linux/pagemap.h>
51 #include <linux/mtd/mtd.h>
52 #include <linux/interrupt.h>
53 #include <linux/string.h>
54 #include <linux/ctype.h>
56 #include "asm/div64.h"
58 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
60 #include <linux/statfs.h> /* Added NCB 15-8-2003 */
61 #include <asm/statfs.h>
62 #define UnlockPage(p) unlock_page(p)
63 #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
65 /* FIXME: use sb->s_id instead ? */
66 #define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
70 #include <linux/locks.h>
71 #define BDEVNAME_SIZE 0
72 #define yaffs_devname(sb, buf) kdevname(sb->s_dev)
74 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
75 /* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
81 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
82 #define WRITE_SIZE_STR "writesize"
83 #define WRITE_SIZE(mtd) (mtd)->writesize
85 #define WRITE_SIZE_STR "oobblock"
86 #define WRITE_SIZE(mtd) (mtd)->oobblock
89 #include <asm/uaccess.h>
92 #include "yaffs_guts.h"
94 #include <linux/mtd/mtd.h>
95 #include "yaffs_mtdif.h"
96 #include "yaffs_mtdif1.h"
97 #include "yaffs_mtdif2.h"
99 unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
100 unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
102 /* Module Parameters */
103 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
104 module_param(yaffs_traceMask,uint,0644);
105 module_param(yaffs_wr_attempts,uint,0644);
107 MODULE_PARM(yaffs_traceMask,"i");
108 MODULE_PARM(yaffs_wr_attempts,"i");
111 /*#define T(x) printk x */
113 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
114 #define yaffs_InodeToObjectLV(iptr) (iptr)->i_private
116 #define yaffs_InodeToObjectLV(iptr) (iptr)->u.generic_ip
119 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
120 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
122 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
123 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
125 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
128 static void yaffs_put_super(struct super_block *sb);
130 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
133 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
134 static int yaffs_file_flush(struct file *file, fl_owner_t id);
136 static int yaffs_file_flush(struct file *file);
139 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
142 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
144 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
145 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
146 struct nameidata *n);
147 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
148 struct nameidata *n);
150 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
151 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
153 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
154 struct dentry *dentry);
155 static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
156 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
157 const char *symname);
158 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
160 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
161 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
164 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
167 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
168 struct inode *new_dir, struct dentry *new_dentry);
169 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
171 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
172 static int yaffs_sync_fs(struct super_block *sb, int wait);
173 static void yaffs_write_super(struct super_block *sb);
175 static int yaffs_sync_fs(struct super_block *sb);
176 static int yaffs_write_super(struct super_block *sb);
179 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
180 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
181 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
182 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
184 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
186 static void yaffs_read_inode(struct inode *inode);
188 static void yaffs_put_inode(struct inode *inode);
189 static void yaffs_delete_inode(struct inode *);
190 static void yaffs_clear_inode(struct inode *);
192 static int yaffs_readpage(struct file *file, struct page *page);
193 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
194 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
196 static int yaffs_writepage(struct page *page);
198 static int yaffs_prepare_write(struct file *f, struct page *pg,
199 unsigned offset, unsigned to);
200 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
203 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
205 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
206 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
208 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
211 static struct address_space_operations yaffs_file_address_operations = {
212 .readpage = yaffs_readpage,
213 .writepage = yaffs_writepage,
214 .prepare_write = yaffs_prepare_write,
215 .commit_write = yaffs_commit_write,
218 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22))
219 static struct file_operations yaffs_file_operations = {
220 .read = do_sync_read,
221 .write = do_sync_write,
222 .aio_read = generic_file_aio_read,
223 .aio_write = generic_file_aio_write,
224 .mmap = generic_file_mmap,
225 .flush = yaffs_file_flush,
226 .fsync = yaffs_sync_object,
227 .splice_read = generic_file_splice_read,
228 .splice_write = generic_file_splice_write,
231 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
233 static struct file_operations yaffs_file_operations = {
234 .read = do_sync_read,
235 .write = do_sync_write,
236 .aio_read = generic_file_aio_read,
237 .aio_write = generic_file_aio_write,
238 .mmap = generic_file_mmap,
239 .flush = yaffs_file_flush,
240 .fsync = yaffs_sync_object,
241 .sendfile = generic_file_sendfile,
246 static struct file_operations yaffs_file_operations = {
247 .read = generic_file_read,
248 .write = generic_file_write,
249 .mmap = generic_file_mmap,
250 .flush = yaffs_file_flush,
251 .fsync = yaffs_sync_object,
252 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
253 .sendfile = generic_file_sendfile,
258 static struct inode_operations yaffs_file_inode_operations = {
259 .setattr = yaffs_setattr,
262 static struct inode_operations yaffs_symlink_inode_operations = {
263 .readlink = yaffs_readlink,
264 .follow_link = yaffs_follow_link,
265 .setattr = yaffs_setattr,
268 static struct inode_operations yaffs_dir_inode_operations = {
269 .create = yaffs_create,
270 .lookup = yaffs_lookup,
272 .unlink = yaffs_unlink,
273 .symlink = yaffs_symlink,
274 .mkdir = yaffs_mkdir,
275 .rmdir = yaffs_unlink,
276 .mknod = yaffs_mknod,
277 .rename = yaffs_rename,
278 .setattr = yaffs_setattr,
281 static struct file_operations yaffs_dir_operations = {
282 .read = generic_read_dir,
283 .readdir = yaffs_readdir,
284 .fsync = yaffs_sync_object,
287 static struct super_operations yaffs_super_ops = {
288 .statfs = yaffs_statfs,
289 .read_inode = yaffs_read_inode,
290 .put_inode = yaffs_put_inode,
291 .put_super = yaffs_put_super,
292 .delete_inode = yaffs_delete_inode,
293 .clear_inode = yaffs_clear_inode,
294 .sync_fs = yaffs_sync_fs,
295 .write_super = yaffs_write_super,
298 static void yaffs_GrossLock(yaffs_Device * dev)
300 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs locking\n"));
302 down(&dev->grossLock);
305 static void yaffs_GrossUnlock(yaffs_Device * dev)
307 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs unlocking\n"));
312 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
315 unsigned char *alias;
318 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
320 yaffs_GrossLock(dev);
322 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
324 yaffs_GrossUnlock(dev);
329 ret = vfs_readlink(dentry, buffer, buflen, alias);
334 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
335 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
337 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
340 unsigned char *alias;
342 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
344 yaffs_GrossLock(dev);
346 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
348 yaffs_GrossUnlock(dev);
356 ret = vfs_follow_link(nd, alias);
359 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
360 return ERR_PTR (ret);
366 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
370 * Lookup is used to find objects in the fs
372 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
374 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
377 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
381 struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
383 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
385 yaffs_GrossLock(dev);
388 (KERN_DEBUG "yaffs_lookup for %d:%s\n",
389 yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
392 yaffs_FindObjectByName(yaffs_InodeToObject(dir),
393 dentry->d_name.name);
395 obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
397 /* Can't hold gross lock when calling yaffs_get_inode() */
398 yaffs_GrossUnlock(dev);
402 (KERN_DEBUG "yaffs_lookup found %d\n", obj->objectId));
404 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
408 (KERN_DEBUG "yaffs_loookup dentry \n"));
409 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
410 * d_add even if NULL inode */
412 /*dget(dentry); // try to solve directory bug */
413 d_add(dentry, inode);
421 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_lookup not found\n"));
425 /* added NCB for 2.5/6 compatability - forces add even if inode is
426 * NULL which creates dentry hash */
427 d_add(dentry, inode);
430 /* return (ERR_PTR(-EIO)); */
434 /* For now put inode is just for debugging
435 * Put inode is called when the inode **structure** is put.
437 static void yaffs_put_inode(struct inode *inode)
440 ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
441 atomic_read(&inode->i_count)));
445 /* clear is called to tell the fs to release any per-inode data it holds */
446 static void yaffs_clear_inode(struct inode *inode)
451 obj = yaffs_InodeToObject(inode);
454 ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
455 atomic_read(&inode->i_count),
456 obj ? "object exists" : "null object"));
460 yaffs_GrossLock(dev);
462 /* Clear the association between the inode and
466 yaffs_InodeToObjectLV(inode) = NULL;
468 /* If the object freeing was deferred, then the real
470 * This should fix the inode inconsistency problem.
473 yaffs_HandleDeferedFree(obj);
475 yaffs_GrossUnlock(dev);
480 /* delete is called when the link count is zero and the inode
481 * is put (ie. nobody wants to know about it anymore, time to
483 * NB Must call clear_inode()
485 static void yaffs_delete_inode(struct inode *inode)
487 yaffs_Object *obj = yaffs_InodeToObject(inode);
491 ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
492 atomic_read(&inode->i_count),
493 obj ? "object exists" : "null object"));
497 yaffs_GrossLock(dev);
498 yaffs_DeleteFile(obj);
499 yaffs_GrossUnlock(dev);
501 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
502 truncate_inode_pages (&inode->i_data, 0);
507 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
508 static int yaffs_file_flush(struct file *file, fl_owner_t id)
510 static int yaffs_file_flush(struct file *file)
513 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
515 yaffs_Device *dev = obj->myDev;
518 (KERN_DEBUG "yaffs_file_flush object %d (%s)\n", obj->objectId,
519 obj->dirty ? "dirty" : "clean"));
521 yaffs_GrossLock(dev);
523 yaffs_FlushFile(obj, 1);
525 yaffs_GrossUnlock(dev);
530 static int yaffs_readpage_nolock(struct file *f, struct page *pg)
532 /* Lifted from jffs2 */
535 unsigned char *pg_buf;
540 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage at %08x, size %08x\n",
541 (unsigned)(pg->index << PAGE_CACHE_SHIFT),
542 (unsigned)PAGE_CACHE_SIZE));
544 obj = yaffs_DentryToObject(f->f_dentry);
548 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
549 BUG_ON(!PageLocked(pg));
556 /* FIXME: Can kmap fail? */
558 yaffs_GrossLock(dev);
561 yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT,
564 yaffs_GrossUnlock(dev);
570 ClearPageUptodate(pg);
577 flush_dcache_page(pg);
580 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage done\n"));
584 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
586 int ret = yaffs_readpage_nolock(f, pg);
591 static int yaffs_readpage(struct file *f, struct page *pg)
593 return yaffs_readpage_unlock(f, pg);
596 /* writepage inspired by/stolen from smbfs */
598 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
599 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
601 static int yaffs_writepage(struct page *page)
604 struct address_space *mapping = page->mapping;
605 loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
607 unsigned long end_index;
615 inode = mapping->host;
619 if (offset > inode->i_size) {
622 "yaffs_writepage at %08x, inode size = %08x!!!\n",
623 (unsigned)(page->index << PAGE_CACHE_SHIFT),
624 (unsigned)inode->i_size));
626 (KERN_DEBUG " -> don't care!!\n"));
631 end_index = inode->i_size >> PAGE_CACHE_SHIFT;
634 if (page->index < end_index) {
635 nBytes = PAGE_CACHE_SIZE;
637 nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
644 obj = yaffs_InodeToObject(inode);
645 yaffs_GrossLock(obj->myDev);
648 (KERN_DEBUG "yaffs_writepage at %08x, size %08x\n",
649 (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
651 (KERN_DEBUG "writepag0: obj = %05x, ino = %05x\n",
652 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
655 yaffs_WriteDataToFile(obj, buffer, page->index << PAGE_CACHE_SHIFT,
659 (KERN_DEBUG "writepag1: obj = %05x, ino = %05x\n",
660 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
662 yaffs_GrossUnlock(obj->myDev);
665 SetPageUptodate(page);
669 return (nWritten == nBytes) ? 0 : -ENOSPC;
672 static int yaffs_prepare_write(struct file *f, struct page *pg,
673 unsigned offset, unsigned to)
676 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_prepair_write\n"));
677 if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
678 return yaffs_readpage_nolock(f, pg);
684 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
688 void *addr = page_address(pg) + offset;
689 loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
690 int nBytes = to - offset;
694 unsigned saddr = (unsigned)addr;
697 (KERN_DEBUG "yaffs_commit_write addr %x pos %x nBytes %d\n", saddr,
700 nWritten = yaffs_file_write(f, addr, nBytes, &pos);
702 if (nWritten != nBytes) {
705 "yaffs_commit_write not same size nWritten %d nBytes %d\n",
708 ClearPageUptodate(pg);
714 (KERN_DEBUG "yaffs_commit_write returning %d\n",
715 nWritten == nBytes ? 0 : nWritten));
717 return nWritten == nBytes ? 0 : nWritten;
721 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
726 /* Check mode against the variant type and attempt to repair if broken. */
727 __u32 mode = obj->yst_mode;
728 switch( obj->variantType ){
729 case YAFFS_OBJECT_TYPE_FILE :
730 if( ! S_ISREG(mode) ){
731 obj->yst_mode &= ~S_IFMT;
732 obj->yst_mode |= S_IFREG;
736 case YAFFS_OBJECT_TYPE_SYMLINK :
737 if( ! S_ISLNK(mode) ){
738 obj->yst_mode &= ~S_IFMT;
739 obj->yst_mode |= S_IFLNK;
743 case YAFFS_OBJECT_TYPE_DIRECTORY :
744 if( ! S_ISDIR(mode) ){
745 obj->yst_mode &= ~S_IFMT;
746 obj->yst_mode |= S_IFDIR;
750 case YAFFS_OBJECT_TYPE_UNKNOWN :
751 case YAFFS_OBJECT_TYPE_HARDLINK :
752 case YAFFS_OBJECT_TYPE_SPECIAL :
758 inode->i_flags |= S_NOATIME;
760 inode->i_ino = obj->objectId;
761 inode->i_mode = obj->yst_mode;
762 inode->i_uid = obj->yst_uid;
763 inode->i_gid = obj->yst_gid;
764 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
765 inode->i_blksize = inode->i_sb->s_blocksize;
767 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
769 inode->i_rdev = old_decode_dev(obj->yst_rdev);
770 inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
771 inode->i_atime.tv_nsec = 0;
772 inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
773 inode->i_mtime.tv_nsec = 0;
774 inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
775 inode->i_ctime.tv_nsec = 0;
777 inode->i_rdev = obj->yst_rdev;
778 inode->i_atime = obj->yst_atime;
779 inode->i_mtime = obj->yst_mtime;
780 inode->i_ctime = obj->yst_ctime;
782 inode->i_size = yaffs_GetObjectFileLength(obj);
783 inode->i_blocks = (inode->i_size + 511) >> 9;
785 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
789 "yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
790 inode->i_mode, inode->i_uid, inode->i_gid,
791 (int)inode->i_size, atomic_read(&inode->i_count)));
793 switch (obj->yst_mode & S_IFMT) {
794 default: /* fifo, device or socket */
795 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
796 init_special_inode(inode, obj->yst_mode,
797 old_decode_dev(obj->yst_rdev));
799 init_special_inode(inode, obj->yst_mode,
800 (dev_t) (obj->yst_rdev));
803 case S_IFREG: /* file */
804 inode->i_op = &yaffs_file_inode_operations;
805 inode->i_fop = &yaffs_file_operations;
806 inode->i_mapping->a_ops =
807 &yaffs_file_address_operations;
809 case S_IFDIR: /* directory */
810 inode->i_op = &yaffs_dir_inode_operations;
811 inode->i_fop = &yaffs_dir_operations;
813 case S_IFLNK: /* symlink */
814 inode->i_op = &yaffs_symlink_inode_operations;
818 yaffs_InodeToObjectLV(inode) = obj;
820 obj->myInode = inode;
824 (KERN_DEBUG "yaffs_FileInode invalid parameters\n"));
829 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
836 (KERN_DEBUG "yaffs_get_inode for NULL super_block!!\n"));
843 (KERN_DEBUG "yaffs_get_inode for NULL object!!\n"));
849 (KERN_DEBUG "yaffs_get_inode for object %d\n", obj->objectId));
851 inode = iget(sb, obj->objectId);
853 /* NB Side effect: iget calls back to yaffs_read_inode(). */
854 /* iget also increments the inode's i_count */
855 /* NB You can't be holding grossLock or deadlock will happen! */
860 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
868 obj = yaffs_DentryToObject(f->f_dentry);
872 yaffs_GrossLock(dev);
874 inode = f->f_dentry->d_inode;
876 if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) {
877 ipos = inode->i_size;
884 (KERN_DEBUG "yaffs_file_write: hey obj is null!\n"));
888 "yaffs_file_write about to write writing %d bytes"
889 "to object %d at %d\n",
890 n, obj->objectId, ipos));
893 nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
896 (KERN_DEBUG "yaffs_file_write writing %d bytes, %d written at %d\n",
901 if (ipos > inode->i_size) {
902 inode->i_size = ipos;
903 inode->i_blocks = (ipos + 511) >> 9;
907 "yaffs_file_write size updated to %d bytes, "
909 ipos, (int)(inode->i_blocks)));
913 yaffs_GrossUnlock(dev);
914 return nWritten == 0 ? -ENOSPC : nWritten;
917 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
921 struct inode *inode = f->f_dentry->d_inode;
922 unsigned long offset, curoffs;
926 char name[YAFFS_MAX_NAME_LENGTH + 1];
928 obj = yaffs_DentryToObject(f->f_dentry);
931 yaffs_GrossLock(dev);
935 T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
939 (KERN_DEBUG "yaffs_readdir: entry . ino %d \n",
941 if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR)
950 (KERN_DEBUG "yaffs_readdir: entry .. ino %d \n",
951 (int)f->f_dentry->d_parent->d_inode->i_ino));
953 (dirent, "..", 2, offset,
954 f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
963 /* If the directory has changed since the open or last call to
964 readdir, rewind to after the 2 canned entries. */
966 if (f->f_version != inode->i_version) {
969 f->f_version = inode->i_version;
972 list_for_each(i, &obj->variant.directoryVariant.children) {
974 if (curoffs >= offset) {
975 l = list_entry(i, yaffs_Object, siblings);
977 yaffs_GetObjectName(l, name,
978 YAFFS_MAX_NAME_LENGTH + 1);
980 (KERN_DEBUG "yaffs_readdir: %s inode %d\n", name,
981 yaffs_GetObjectInode(l)));
987 yaffs_GetObjectInode(l),
988 yaffs_GetObjectType(l))
1001 yaffs_GrossUnlock(dev);
1007 * File creation. Allocate an inode, and we're done..
1009 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1010 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1013 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1017 struct inode *inode;
1019 yaffs_Object *obj = NULL;
1022 yaffs_Object *parent = yaffs_InodeToObject(dir);
1024 int error = -ENOSPC;
1025 uid_t uid = current->fsuid;
1026 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
1028 if((dir->i_mode & S_ISGID) && S_ISDIR(mode))
1033 (KERN_DEBUG "yaffs_mknod: parent object %d type %d\n",
1034 parent->objectId, parent->variantType));
1037 (KERN_DEBUG "yaffs_mknod: could not get parent object\n"));
1041 T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
1043 dentry->d_name.name, mode, rdev));
1045 dev = parent->myDev;
1047 yaffs_GrossLock(dev);
1049 switch (mode & S_IFMT) {
1051 /* Special (socket, fifo, device...) */
1052 T(YAFFS_TRACE_OS, (KERN_DEBUG
1053 "yaffs_mknod: making special\n"));
1054 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1056 yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1057 gid, old_encode_dev(rdev));
1060 yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1064 case S_IFREG: /* file */
1065 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
1067 yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
1070 case S_IFDIR: /* directory */
1072 (KERN_DEBUG "yaffs_mknod: making directory\n"));
1074 yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
1077 case S_IFLNK: /* symlink */
1078 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
1079 obj = NULL; /* Do we ever get here? */
1083 /* Can not call yaffs_get_inode() with gross lock held */
1084 yaffs_GrossUnlock(dev);
1087 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
1088 d_instantiate(dentry, inode);
1090 (KERN_DEBUG "yaffs_mknod created object %d count = %d\n",
1091 obj->objectId, atomic_read(&inode->i_count)));
1095 (KERN_DEBUG "yaffs_mknod failed making object\n"));
1102 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1105 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mkdir\n"));
1106 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
1108 /* attempt to fix dir bug - didn't work */
1116 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1117 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
1118 struct nameidata *n)
1120 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
1123 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_create\n"));
1124 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
1127 static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
1134 (KERN_DEBUG "yaffs_unlink %d:%s\n", (int)(dir->i_ino),
1135 dentry->d_name.name));
1137 dev = yaffs_InodeToObject(dir)->myDev;
1139 yaffs_GrossLock(dev);
1141 retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
1143 if (retVal == YAFFS_OK) {
1144 dentry->d_inode->i_nlink--;
1146 yaffs_GrossUnlock(dev);
1147 mark_inode_dirty(dentry->d_inode);
1150 yaffs_GrossUnlock(dev);
1157 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
1158 struct dentry *dentry)
1160 struct inode *inode = old_dentry->d_inode;
1161 yaffs_Object *obj = NULL;
1162 yaffs_Object *link = NULL;
1165 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_link\n"));
1167 obj = yaffs_InodeToObject(inode);
1170 yaffs_GrossLock(dev);
1172 if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
1175 yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
1180 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1181 d_instantiate(dentry, old_dentry->d_inode);
1182 atomic_inc(&old_dentry->d_inode->i_count);
1184 (KERN_DEBUG "yaffs_link link count %d i_count %d\n",
1185 old_dentry->d_inode->i_nlink,
1186 atomic_read(&old_dentry->d_inode->i_count)));
1190 yaffs_GrossUnlock(dev);
1200 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
1201 const char *symname)
1205 uid_t uid = current->fsuid;
1206 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
1208 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_symlink\n"));
1210 dev = yaffs_InodeToObject(dir)->myDev;
1211 yaffs_GrossLock(dev);
1212 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1213 S_IFLNK | S_IRWXUGO, uid, gid, symname);
1214 yaffs_GrossUnlock(dev);
1218 struct inode *inode;
1220 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1221 d_instantiate(dentry, inode);
1222 T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink created OK\n"));
1225 T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink not created\n"));
1232 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
1239 obj = yaffs_DentryToObject(dentry);
1243 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_object\n"));
1244 yaffs_GrossLock(dev);
1245 yaffs_FlushFile(obj, 1);
1246 yaffs_GrossUnlock(dev);
1251 * The VFS layer already does all the dentry stuff for rename.
1253 * NB: POSIX says you can rename an object over an old object of the same name
1255 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
1256 struct inode *new_dir, struct dentry *new_dentry)
1259 int retVal = YAFFS_FAIL;
1260 yaffs_Object *target;
1262 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_rename\n"));
1263 dev = yaffs_InodeToObject(old_dir)->myDev;
1265 yaffs_GrossLock(dev);
1267 /* Check if the target is an existing directory that is not empty. */
1269 yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
1270 new_dentry->d_name.name);
1275 target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1276 !list_empty(&target->variant.directoryVariant.children)) {
1278 T(YAFFS_TRACE_OS, (KERN_DEBUG "target is non-empty dir\n"));
1280 retVal = YAFFS_FAIL;
1283 /* Now does unlinking internally using shadowing mechanism */
1284 T(YAFFS_TRACE_OS, (KERN_DEBUG "calling yaffs_RenameObject\n"));
1287 yaffs_RenameObject(yaffs_InodeToObject(old_dir),
1288 old_dentry->d_name.name,
1289 yaffs_InodeToObject(new_dir),
1290 new_dentry->d_name.name);
1293 yaffs_GrossUnlock(dev);
1295 if (retVal == YAFFS_OK) {
1297 new_dentry->d_inode->i_nlink--;
1298 mark_inode_dirty(new_dentry->d_inode);
1308 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1310 struct inode *inode = dentry->d_inode;
1315 (KERN_DEBUG "yaffs_setattr of object %d\n",
1316 yaffs_InodeToObject(inode)->objectId));
1318 if ((error = inode_change_ok(inode, attr)) == 0) {
1320 dev = yaffs_InodeToObject(inode)->myDev;
1321 yaffs_GrossLock(dev);
1322 if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
1328 yaffs_GrossUnlock(dev);
1330 error = inode_setattr(inode, attr);
1335 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1336 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
1338 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
1339 struct super_block *sb = dentry->d_sb;
1340 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1341 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1343 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1345 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1347 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1350 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_statfs\n"));
1352 yaffs_GrossLock(dev);
1354 buf->f_type = YAFFS_MAGIC;
1355 buf->f_bsize = sb->s_blocksize;
1356 buf->f_namelen = 255;
1358 if(dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)){
1359 /* Do this if chunk size is not a power of 2 */
1361 uint64_t bytesInDev;
1364 bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock +1))) *
1365 ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
1367 do_div(bytesInDev,sb->s_blocksize); /* bytesInDev becomes the number of blocks */
1368 buf->f_blocks = bytesInDev;
1370 bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
1371 ((uint64_t)(dev->nDataBytesPerChunk));
1373 do_div(bytesFree,sb->s_blocksize);
1375 buf->f_bfree = bytesFree;
1377 } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
1380 (dev->endBlock - dev->startBlock + 1) *
1381 dev->nChunksPerBlock /
1382 (sb->s_blocksize / dev->nDataBytesPerChunk);
1384 yaffs_GetNumberOfFreeChunks(dev) /
1385 (sb->s_blocksize / dev->nDataBytesPerChunk);
1388 (dev->endBlock - dev->startBlock + 1) *
1389 dev->nChunksPerBlock *
1390 (dev->nDataBytesPerChunk / sb->s_blocksize);
1393 yaffs_GetNumberOfFreeChunks(dev) *
1394 (dev->nDataBytesPerChunk / sb->s_blocksize);
1400 buf->f_bavail = buf->f_bfree;
1402 yaffs_GrossUnlock(dev);
1408 static int yaffs_do_sync_fs(struct super_block *sb)
1411 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1412 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_do_sync_fs\n"));
1415 yaffs_GrossLock(dev);
1418 yaffs_CheckpointSave(dev);
1420 yaffs_GrossUnlock(dev);
1428 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1429 static void yaffs_write_super(struct super_block *sb)
1431 static int yaffs_write_super(struct super_block *sb)
1435 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_super\n"));
1436 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
1437 return 0; /* yaffs_do_sync_fs(sb);*/
1442 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1443 static int yaffs_sync_fs(struct super_block *sb, int wait)
1445 static int yaffs_sync_fs(struct super_block *sb)
1449 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_fs\n"));
1451 return 0; /* yaffs_do_sync_fs(sb);*/
1456 static void yaffs_read_inode(struct inode *inode)
1458 /* NB This is called as a side effect of other functions, but
1459 * we had to release the lock to prevent deadlocks, so
1460 * need to lock again.
1464 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
1467 (KERN_DEBUG "yaffs_read_inode for %d\n", (int)inode->i_ino));
1469 yaffs_GrossLock(dev);
1471 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
1473 yaffs_FillInodeFromObject(inode, obj);
1475 yaffs_GrossUnlock(dev);
1478 static LIST_HEAD(yaffs_dev_list);
1481 static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
1483 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1485 if( *flags & MS_RDONLY ) {
1486 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1489 (KERN_DEBUG "yaffs_remount_fs: %s: RO\n", dev->name ));
1491 yaffs_GrossLock(dev);
1493 yaffs_FlushEntireDeviceCache(dev);
1495 yaffs_CheckpointSave(dev);
1500 yaffs_GrossUnlock(dev);
1504 (KERN_DEBUG "yaffs_remount_fs: %s: RW\n", dev->name ));
1511 static void yaffs_put_super(struct super_block *sb)
1513 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1515 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_put_super\n"));
1517 yaffs_GrossLock(dev);
1519 yaffs_FlushEntireDeviceCache(dev);
1521 yaffs_CheckpointSave(dev);
1523 if (dev->putSuperFunc) {
1524 dev->putSuperFunc(sb);
1527 yaffs_Deinitialise(dev);
1529 yaffs_GrossUnlock(dev);
1531 /* we assume this is protected by lock_kernel() in mount/umount */
1532 list_del(&dev->devList);
1534 if(dev->spareBuffer){
1535 YFREE(dev->spareBuffer);
1536 dev->spareBuffer = NULL;
1543 static void yaffs_MTDPutSuper(struct super_block *sb)
1546 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1552 put_mtd_device(mtd);
1556 static void yaffs_MarkSuperBlockDirty(void *vsb)
1558 struct super_block *sb = (struct super_block *)vsb;
1560 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_MarkSuperBlockDirty() sb = %p\n",sb));
1567 int skip_checkpoint_read;
1568 int skip_checkpoint_write;
1572 #define MAX_OPT_LEN 20
1573 static int yaffs_parse_options(yaffs_options *options, const char *options_str)
1575 char cur_opt[MAX_OPT_LEN+1];
1579 /* Parse through the options which is a comma seperated list */
1581 while(options_str && *options_str && !error){
1582 memset(cur_opt,0,MAX_OPT_LEN+1);
1585 while(*options_str && *options_str != ','){
1586 if(p < MAX_OPT_LEN){
1587 cur_opt[p] = *options_str;
1593 if(!strcmp(cur_opt,"inband-tags"))
1594 options->inband_tags = 1;
1595 else if(!strcmp(cur_opt,"no-cache"))
1596 options->no_cache = 1;
1597 else if(!strcmp(cur_opt,"no-checkpoint-read"))
1598 options->skip_checkpoint_read = 1;
1599 else if(!strcmp(cur_opt,"no-checkpoint-write"))
1600 options->skip_checkpoint_write = 1;
1601 else if(!strcmp(cur_opt,"no-checkpoint")){
1602 options->skip_checkpoint_read = 1;
1603 options->skip_checkpoint_write = 1;
1605 printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",cur_opt);
1614 static struct super_block *yaffs_internal_read_super(int yaffsVersion,
1615 struct super_block *sb,
1616 void *data, int silent)
1619 struct inode *inode = NULL;
1620 struct dentry *root;
1621 yaffs_Device *dev = 0;
1622 char devname_buf[BDEVNAME_SIZE + 1];
1623 struct mtd_info *mtd;
1625 char *data_str = (char *)data;
1627 yaffs_options options;
1629 sb->s_magic = YAFFS_MAGIC;
1630 sb->s_op = &yaffs_super_ops;
1631 sb->s_flags |= MS_NOATIME;
1634 printk(KERN_INFO "yaffs: sb is NULL\n");
1635 else if (!sb->s_dev)
1636 printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
1637 else if (!yaffs_devname(sb, devname_buf))
1638 printk(KERN_INFO "yaffs: devname is NULL\n");
1640 printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
1642 yaffs_devname(sb, devname_buf));
1647 printk(KERN_INFO "yaffs: passed flags \"%s\"\n",data_str);
1649 memset(&options,0,sizeof(options));
1651 if(yaffs_parse_options(&options,data_str)){
1652 /* Option parsing failed */
1657 sb->s_blocksize = PAGE_CACHE_SIZE;
1658 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
1659 T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
1661 ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
1663 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
1665 ("yaffs: Write verification disabled. All guarantees "
1666 "null and void\n"));
1669 T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
1671 MAJOR(sb->s_dev), MINOR(sb->s_dev),
1672 yaffs_devname(sb, devname_buf)));
1674 /* Check it's an mtd device..... */
1675 if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) {
1676 return NULL; /* This isn't an mtd device */
1678 /* Get the device */
1679 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
1681 T(YAFFS_TRACE_ALWAYS,
1682 ("yaffs: MTD device #%u doesn't appear to exist\n",
1686 /* Check it's NAND */
1687 if (mtd->type != MTD_NANDFLASH) {
1688 T(YAFFS_TRACE_ALWAYS,
1689 ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
1693 T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
1694 T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
1695 T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
1696 T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
1697 T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
1698 T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
1699 T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
1700 T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
1701 T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
1702 T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
1703 T(YAFFS_TRACE_OS, (" size %d\n", mtd->size));
1705 #ifdef CONFIG_YAFFS_AUTO_YAFFS2
1707 if (yaffsVersion == 1 &&
1708 WRITE_SIZE(mtd) >= 2048) {
1709 T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs2\n"));
1713 /* Added NCB 26/5/2006 for completeness */
1714 if (yaffsVersion == 2 &&
1715 !options.inband_tags &&
1716 WRITE_SIZE(mtd) == 512){
1717 T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs1\n"));
1723 if (yaffsVersion == 2) {
1724 /* Check for version 2 style functions */
1726 !mtd->block_isbad ||
1727 !mtd->block_markbad ||
1730 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1731 !mtd->read_oob || !mtd->write_oob) {
1734 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1736 T(YAFFS_TRACE_ALWAYS,
1737 ("yaffs: MTD device does not support required "
1742 if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
1743 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
1744 !options.inband_tags) {
1745 T(YAFFS_TRACE_ALWAYS,
1746 ("yaffs: MTD device does not have the "
1747 "right page sizes\n"));
1751 /* Check for V1 style functions */
1755 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1756 !mtd->read_oob || !mtd->write_oob) {
1759 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1761 T(YAFFS_TRACE_ALWAYS,
1762 ("yaffs: MTD device does not support required "
1767 if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
1768 mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
1769 T(YAFFS_TRACE_ALWAYS,
1770 ("yaffs: MTD device does not support have the "
1771 "right page sizes\n"));
1776 /* OK, so if we got here, we have an MTD that's NAND and looks
1777 * like it has the right capabilities
1778 * Set the yaffs_Device up for mtd
1781 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1782 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
1784 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
1787 /* Deep shit could not allocate device structure */
1788 T(YAFFS_TRACE_ALWAYS,
1789 ("yaffs_read_super: Failed trying to allocate "
1790 "yaffs_Device. \n"));
1794 memset(dev, 0, sizeof(yaffs_Device));
1795 dev->genericDevice = mtd;
1796 dev->name = mtd->name;
1798 /* Set up the memory size parameters.... */
1800 nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1801 dev->startBlock = 0;
1802 dev->endBlock = nBlocks - 1;
1803 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1804 dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1805 dev->nReservedBlocks = 5;
1806 dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
1807 dev->inbandTags = options.inband_tags;
1809 /* ... and the functions. */
1810 if (yaffsVersion == 2) {
1811 dev->writeChunkWithTagsToNAND =
1812 nandmtd2_WriteChunkWithTagsToNAND;
1813 dev->readChunkWithTagsFromNAND =
1814 nandmtd2_ReadChunkWithTagsFromNAND;
1815 dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
1816 dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
1817 dev->spareBuffer = YMALLOC(mtd->oobsize);
1819 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1820 dev->totalBytesPerChunk = mtd->writesize;
1821 dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
1823 dev->totalBytesPerChunk = mtd->oobblock;
1824 dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
1826 nBlocks = mtd->size / mtd->erasesize;
1828 dev->startBlock = 0;
1829 dev->endBlock = nBlocks - 1;
1831 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1832 /* use the MTD interface in yaffs_mtdif1.c */
1833 dev->writeChunkWithTagsToNAND =
1834 nandmtd1_WriteChunkWithTagsToNAND;
1835 dev->readChunkWithTagsFromNAND =
1836 nandmtd1_ReadChunkWithTagsFromNAND;
1837 dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
1838 dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
1840 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
1841 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
1845 /* ... and common functions */
1846 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
1847 dev->initialiseNAND = nandmtd_InitialiseNAND;
1849 dev->putSuperFunc = yaffs_MTDPutSuper;
1851 dev->superBlock = (void *)sb;
1852 dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
1855 #ifndef CONFIG_YAFFS_DOES_ECC
1856 dev->useNANDECC = 1;
1859 #ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
1860 dev->wideTnodesDisabled = 1;
1863 dev->skipCheckpointRead = options.skip_checkpoint_read;
1864 dev->skipCheckpointWrite = options.skip_checkpoint_write;
1866 /* we assume this is protected by lock_kernel() in mount/umount */
1867 list_add_tail(&dev->devList, &yaffs_dev_list);
1869 init_MUTEX(&dev->grossLock);
1871 yaffs_GrossLock(dev);
1873 err = yaffs_GutsInitialise(dev);
1876 ("yaffs_read_super: guts initialised %s\n",
1877 (err == YAFFS_OK) ? "OK" : "FAILED"));
1879 /* Release lock before yaffs_get_inode() */
1880 yaffs_GrossUnlock(dev);
1882 /* Create root inode */
1883 if (err == YAFFS_OK)
1884 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
1890 inode->i_op = &yaffs_dir_inode_operations;
1891 inode->i_fop = &yaffs_dir_operations;
1893 T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
1895 root = d_alloc_root(inode);
1897 T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
1905 T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
1910 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1911 static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
1914 return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
1917 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1918 static int yaffs_read_super(struct file_system_type *fs,
1919 int flags, const char *dev_name,
1920 void *data, struct vfsmount *mnt)
1923 return get_sb_bdev(fs, flags, dev_name, data,
1924 yaffs_internal_read_super_mtd, mnt);
1927 static struct super_block *yaffs_read_super(struct file_system_type *fs,
1928 int flags, const char *dev_name,
1932 return get_sb_bdev(fs, flags, dev_name, data,
1933 yaffs_internal_read_super_mtd);
1937 static struct file_system_type yaffs_fs_type = {
1938 .owner = THIS_MODULE,
1940 .get_sb = yaffs_read_super,
1941 .kill_sb = kill_block_super,
1942 .fs_flags = FS_REQUIRES_DEV,
1945 static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
1948 return yaffs_internal_read_super(1, sb, data, silent);
1951 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
1956 #ifdef CONFIG_YAFFS_YAFFS2
1958 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1959 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
1962 return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
1965 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1966 static int yaffs2_read_super(struct file_system_type *fs,
1967 int flags, const char *dev_name, void *data,
1968 struct vfsmount *mnt)
1970 return get_sb_bdev(fs, flags, dev_name, data,
1971 yaffs2_internal_read_super_mtd, mnt);
1974 static struct super_block *yaffs2_read_super(struct file_system_type *fs,
1975 int flags, const char *dev_name,
1979 return get_sb_bdev(fs, flags, dev_name, data,
1980 yaffs2_internal_read_super_mtd);
1984 static struct file_system_type yaffs2_fs_type = {
1985 .owner = THIS_MODULE,
1987 .get_sb = yaffs2_read_super,
1988 .kill_sb = kill_block_super,
1989 .fs_flags = FS_REQUIRES_DEV,
1992 static struct super_block *yaffs2_read_super(struct super_block *sb,
1993 void *data, int silent)
1995 return yaffs_internal_read_super(2, sb, data, silent);
1998 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
2002 #endif /* CONFIG_YAFFS_YAFFS2 */
2004 static struct proc_dir_entry *my_proc_entry;
2006 static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
2008 buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
2009 buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
2010 buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
2011 buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
2012 buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
2013 buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
2014 buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
2015 buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
2016 buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
2017 buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
2018 buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
2019 buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
2020 buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
2021 buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
2022 buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
2023 buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
2024 buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
2025 buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
2026 buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
2027 buf += sprintf(buf, "passiveGCs......... %d\n",
2028 dev->passiveGarbageCollections);
2029 buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
2030 buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
2031 buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
2032 buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
2033 buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
2034 buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
2035 buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
2036 buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
2037 buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
2038 buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
2040 sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
2041 buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
2042 buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
2043 buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
2048 static int yaffs_proc_read(char *page,
2050 off_t offset, int count, int *eof, void *data)
2052 struct list_head *item;
2057 /* Get proc_file_read() to step 'offset' by one on each sucessive call.
2058 * We use 'offset' (*ppos) to indicate where we are in devList.
2059 * This also assumes the user has posted a read buffer large
2060 * enough to hold the complete output; but that's life in /proc.
2065 /* Print header first */
2067 buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
2068 "\n%s\n%s\n", yaffs_fs_c_version,
2069 yaffs_guts_c_version);
2072 /* hold lock_kernel while traversing yaffs_dev_list */
2075 /* Locate and print the Nth entry. Order N-squared but N is small. */
2076 list_for_each(item, &yaffs_dev_list) {
2077 yaffs_Device *dev = list_entry(item, yaffs_Device, devList);
2082 buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
2083 buf = yaffs_dump_dev(buf, dev);
2088 return buf - page < count ? buf - page : count;
2092 * Set the verbosity of the warnings and error messages.
2094 * Note that the names can only be a..z or _ with the current code.
2099 unsigned mask_bitfield;
2101 {"allocate", YAFFS_TRACE_ALLOCATE},
2102 {"always", YAFFS_TRACE_ALWAYS},
2103 {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
2104 {"buffers", YAFFS_TRACE_BUFFERS},
2105 {"bug", YAFFS_TRACE_BUG},
2106 {"checkpt", YAFFS_TRACE_CHECKPOINT},
2107 {"deletion", YAFFS_TRACE_DELETION},
2108 {"erase", YAFFS_TRACE_ERASE},
2109 {"error", YAFFS_TRACE_ERROR},
2110 {"gc_detail", YAFFS_TRACE_GC_DETAIL},
2111 {"gc", YAFFS_TRACE_GC},
2112 {"mtd", YAFFS_TRACE_MTD},
2113 {"nandaccess", YAFFS_TRACE_NANDACCESS},
2114 {"os", YAFFS_TRACE_OS},
2115 {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
2116 {"scan", YAFFS_TRACE_SCAN},
2117 {"tracing", YAFFS_TRACE_TRACING},
2119 {"verify", YAFFS_TRACE_VERIFY},
2120 {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
2121 {"verify_full", YAFFS_TRACE_VERIFY_FULL},
2122 {"verify_all", YAFFS_TRACE_VERIFY_ALL},
2124 {"write", YAFFS_TRACE_WRITE},
2125 {"all", 0xffffffff},
2130 #define MAX_MASK_NAME_LENGTH 40
2131 static int yaffs_proc_write(struct file *file, const char *buf,
2132 unsigned long count, void *data)
2134 unsigned rg = 0, mask_bitfield;
2138 char substring[MAX_MASK_NAME_LENGTH+1];
2144 rg = yaffs_traceMask;
2146 while (!done && (pos < count)) {
2148 while ((pos < count) && isspace(buf[pos])) {
2166 mask_bitfield = simple_strtoul(buf + pos, &end, 0);
2167 if (end > buf + pos) {
2168 mask_name = "numeral";
2169 len = end - (buf + pos);
2173 for(x = buf + pos, i = 0;
2174 (*x == '_' || (*x >='a' && *x <= 'z')) &&
2175 i <MAX_MASK_NAME_LENGTH; x++, i++, pos++)
2177 substring[i] = '\0';
2179 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2180 if(strcmp(substring,mask_flags[i].mask_name) == 0){
2181 mask_name = mask_flags[i].mask_name;
2182 mask_bitfield = mask_flags[i].mask_bitfield;
2189 if (mask_name != NULL) {
2193 rg &= ~mask_bitfield;
2196 rg |= mask_bitfield;
2202 rg |= mask_bitfield;
2208 yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
2210 printk("new trace = 0x%08X\n",yaffs_traceMask);
2212 if (rg & YAFFS_TRACE_ALWAYS) {
2213 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2215 flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
2216 printk("%c%s\n", flag, mask_flags[i].mask_name);
2223 /* Stuff to handle installation of file systems */
2224 struct file_system_to_install {
2225 struct file_system_type *fst;
2229 static struct file_system_to_install fs_to_install[] = {
2230 //#ifdef CONFIG_YAFFS_YAFFS1
2231 {&yaffs_fs_type, 0},
2233 //#ifdef CONFIG_YAFFS_YAFFS2
2234 {&yaffs2_fs_type, 0},
2239 static int __init init_yaffs_fs(void)
2242 struct file_system_to_install *fsinst;
2244 T(YAFFS_TRACE_ALWAYS,
2245 ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
2247 /* Install the proc_fs entry */
2248 my_proc_entry = create_proc_entry("yaffs",
2252 if (my_proc_entry) {
2253 my_proc_entry->write_proc = yaffs_proc_write;
2254 my_proc_entry->read_proc = yaffs_proc_read;
2255 my_proc_entry->data = NULL;
2260 /* Now add the file system entries */
2262 fsinst = fs_to_install;
2264 while (fsinst->fst && !error) {
2265 error = register_filesystem(fsinst->fst);
2267 fsinst->installed = 1;
2272 /* Any errors? uninstall */
2274 fsinst = fs_to_install;
2276 while (fsinst->fst) {
2277 if (fsinst->installed) {
2278 unregister_filesystem(fsinst->fst);
2279 fsinst->installed = 0;
2288 static void __exit exit_yaffs_fs(void)
2291 struct file_system_to_install *fsinst;
2293 T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
2296 remove_proc_entry("yaffs", &proc_root);
2298 fsinst = fs_to_install;
2300 while (fsinst->fst) {
2301 if (fsinst->installed) {
2302 unregister_filesystem(fsinst->fst);
2303 fsinst->installed = 0;
2310 module_init(init_yaffs_fs)
2311 module_exit(exit_yaffs_fs)
2313 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
2314 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
2315 MODULE_LICENSE("GPL");