Mercurial > yaffs-ecoscentric-gpl
view yaffs_fs.c @ 32:e344a10a3a1e
Move the internals read_super() functions near the declaration of
they corresponding fs_type declaration so that their compilation are properly conditionalized.
| author | luc <luc> |
|---|---|
| date | Fri, 29 Jul 2005 20:13:23 +0000 |
| parents | 28edf97b9d9a |
| children | e98ab6dcd6b7 |
line wrap: on
line source
/* * YAFFS: Yet another FFS. A NAND-flash specific file system. * yaffs_fs.c * * Copyright (C) 2002 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This is the file system front-end to YAFFS that hooks it up to * the VFS. * * Special notes: * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with this superblock * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this superblock * >> inode->u.generic_ip points to the associated yaffs_Object. * * * Acknowledgements: * * Luc van OostenRyck for numerous patches. * * Nick Bane for numerous patches. * * Nick Bane for 2.5/2.6 integration. * * Andras Toth for mknod rdev issue. * * Michael Fischer for finding the problem with inode inconsistency. * * Some code bodily lifted from JFFS2. */ const char *yaffs_fs_c_version = "$Id: yaffs_fs.c,v 1.13 2005-07-29 20:13:23 luc Exp $"; extern const char *yaffs_guts_c_version; #include <linux/config.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/version.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/list.h> #include <linux/fs.h> #include <linux/proc_fs.h> #include <linux/smp_lock.h> #include <linux/pagemap.h> #include <linux/mtd/mtd.h> #include <linux/interrupt.h> #include <linux/string.h> #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) #include <linux/statfs.h> /* Added NCB 15-8-2003 */ #include <asm/statfs.h> #define UnlockPage(p) unlock_page(p) #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags) //#define kdevname(x) cdevname(to_kdev_t(x)) #define kdevname(x) "(unavailable)" // temporary fix #else #include <linux/locks.h> #endif #include <asm/uaccess.h> #include "yportenv.h" #include "yaffs_guts.h" unsigned yaffs_traceMask = YAFFS_TRACE_ALWAYS | YAFFS_TRACE_BAD_BLOCKS; //unsigned yaffs_traceMask = 0xFFFFFFFF; #ifdef CONFIG_YAFFS_RAM_ENABLED #include "yaffs_nandemul.h" // 2 MB of RAM for emulation #define YAFFS_RAM_EMULATION_SIZE 0x200000 #endif //CONFIG_YAFFS_RAM_ENABLED #if CONFIG_YAFFS2_RAM_ENABLED #include "yaffs_nandemul2k.h" #endif #ifdef CONFIG_YAFFS_MTD_ENABLED #include <linux/mtd/mtd.h> #include "yaffs_mtdif.h" #include "yaffs_mtdif2.h" #endif //CONFIG_YAFFS_MTD_ENABLED //#define T(x) printk x #define yaffs_InodeToObject(iptr) ((yaffs_Object *)((iptr)->u.generic_ip)) #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode) //NCB #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp) //#if defined(CONFIG_KERNEL_2_5) #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info) #else #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp) #endif static void yaffs_put_super(struct super_block *sb); #if 0 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos); #endif static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos); static int yaffs_file_flush(struct file* file); static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync); static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir); //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n); static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n); #else static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode); static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry); #endif static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry); static int yaffs_unlink(struct inode * dir, struct dentry *dentry); static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname); static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode); //#if defined(CONFIG_KERNEL_2_5) #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev); #else static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int dev); #endif static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry); static int yaffs_setattr(struct dentry *dentry, struct iattr *attr); //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf); #else static int yaffs_statfs(struct super_block *sb, struct statfs *buf); #endif static void yaffs_read_inode (struct inode *inode); static void yaffs_put_inode (struct inode *inode); static void yaffs_delete_inode(struct inode *); static void yaffs_clear_inode(struct inode *); static int yaffs_readpage(struct file *file, struct page * page); #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_writepage(struct page *page, struct writeback_control *wbc); #else static int yaffs_writepage(struct page *page); #endif static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to); static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to); static int yaffs_readlink(struct dentry *dentry, char __user *buffer, int buflen); static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); static struct address_space_operations yaffs_file_address_operations = { .readpage = yaffs_readpage, .writepage = yaffs_writepage, .prepare_write = yaffs_prepare_write, .commit_write = yaffs_commit_write, }; static struct file_operations yaffs_file_operations = { .read = generic_file_read, .write = generic_file_write, .mmap = generic_file_mmap, .flush = yaffs_file_flush, .fsync = yaffs_sync_object, }; static struct inode_operations yaffs_file_inode_operations = { .setattr = yaffs_setattr, }; struct inode_operations yaffs_symlink_inode_operations = { .readlink = yaffs_readlink, .follow_link = yaffs_follow_link, .setattr = yaffs_setattr, }; static struct inode_operations yaffs_dir_inode_operations = { .create = yaffs_create, .lookup = yaffs_lookup, .link = yaffs_link, .unlink = yaffs_unlink, .symlink = yaffs_symlink, .mkdir = yaffs_mkdir, .rmdir = yaffs_unlink, .mknod = yaffs_mknod, .rename = yaffs_rename, .setattr = yaffs_setattr, }; static struct file_operations yaffs_dir_operations = { .read = generic_read_dir, .readdir = yaffs_readdir, .fsync = yaffs_sync_object, }; static struct super_operations yaffs_super_ops = { .statfs = yaffs_statfs, .read_inode = yaffs_read_inode, .put_inode = yaffs_put_inode, .put_super = yaffs_put_super, .delete_inode = yaffs_delete_inode, .clear_inode = yaffs_clear_inode, }; static void yaffs_GrossLock(yaffs_Device *dev) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs locking\n")); down(&dev->grossLock); } static void yaffs_GrossUnlock(yaffs_Device *dev) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs unlocking\n")); up(&dev->grossLock); } static int yaffs_readlink(struct dentry *dentry, char __user *buffer, int buflen) { unsigned char *alias; int ret; yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; yaffs_GrossLock(dev); alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry)); yaffs_GrossUnlock(dev); if(!alias) return -ENOMEM; ret = vfs_readlink(dentry, buffer, buflen, alias); kfree(alias); return ret; } static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) { unsigned char *alias; int ret; yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; yaffs_GrossLock(dev); alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry)); yaffs_GrossUnlock(dev); if(!alias) return -ENOMEM; ret = vfs_follow_link(nd,alias); kfree(alias); return ret; } struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj); /* * Lookup is used to find objects in the fs */ //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n) #else static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry) #endif { yaffs_Object *obj; struct inode *inode = NULL; // NCB 2.5/2.6 needs NULL here yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev; yaffs_GrossLock(dev); T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup for %d:%s\n",yaffs_InodeToObject(dir)->objectId,dentry->d_name.name)); obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),dentry->d_name.name); obj = yaffs_GetEquivalentObject(obj); // in case it was a hardlink if(obj) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup found %d\n",obj->objectId)); inode = yaffs_get_inode(dir->i_sb, obj->yst_mode,0,obj); if(inode) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_loookup dentry \n")); /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to d_add even if NULL inode */ #if 0 //dget(dentry); // try to solve directory bug d_add(dentry,inode); yaffs_GrossUnlock(dev); // return dentry; return NULL; #endif } } else { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup not found\n")); } yaffs_GrossUnlock(dev); /* added NCB for 2.5/6 compatability - forces add even if inode is NULL which creates dentry hash*/ d_add(dentry,inode); return NULL; // return (ERR_PTR(-EIO)); } // For now put inode is just for debugging // Put inode is called when the inode **structure** is put. static void yaffs_put_inode(struct inode *inode) { T(YAFFS_TRACE_OS,("yaffs_put_inode: ino %d, count %d\n",(int)inode->i_ino, atomic_read(&inode->i_count))); } // clear is called to tell the fs to release any per-inode data it holds static void yaffs_clear_inode(struct inode *inode) { yaffs_Object *obj; yaffs_Device *dev; obj = yaffs_InodeToObject(inode); T(YAFFS_TRACE_OS,("yaffs_clear_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count), obj ? "object exists" : "null object")); if(obj) { dev = obj->myDev; yaffs_GrossLock(dev); // Clear the association between the inode ant the yaffs_Object. obj->myInode = NULL; inode->u.generic_ip = NULL; // If the object freeing was deferred, then the real free happens now. // This should fix the inode inconsistency problem. yaffs_HandleDeferedFree(obj); yaffs_GrossUnlock(dev); } } // delete is called when the link count is zero and the inode // is put (ie. nobody wants to know about it anymore, time to // delete the file). // NB Must call clear_inode() static void yaffs_delete_inode(struct inode *inode) { yaffs_Object *obj = yaffs_InodeToObject(inode); yaffs_Device *dev; T(YAFFS_TRACE_OS,("yaffs_delete_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count), obj ? "object exists" : "null object")); if(obj) { dev = obj->myDev; yaffs_GrossLock(dev); yaffs_DeleteFile(obj); yaffs_GrossUnlock(dev); } clear_inode(inode); } static int yaffs_file_flush(struct file* file) { yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry); yaffs_Device *dev = obj->myDev; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_flush object %d (%s)\n",obj->objectId, obj->dirty ? "dirty" : "clean")); yaffs_GrossLock(dev); yaffs_FlushFile(obj,1); yaffs_GrossUnlock(dev); return 0; } static int yaffs_readpage_nolock(struct file *f, struct page * pg) { // Lifted from jffs2 yaffs_Object *obj; unsigned char *pg_buf; int ret; yaffs_Device *dev; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage at %08x, size %08x\n", (unsigned)(pg->index << PAGE_CACHE_SHIFT), (unsigned)PAGE_CACHE_SIZE)); obj = yaffs_DentryToObject(f->f_dentry); dev = obj->myDev; #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) BUG_ON(!PageLocked(pg)); #else if (!PageLocked(pg)) PAGE_BUG(pg); #endif pg_buf = kmap(pg); /* FIXME: Can kmap fail? */ yaffs_GrossLock(dev); ret = yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE); yaffs_GrossUnlock(dev); if(ret >= 0) ret = 0; if (ret) { ClearPageUptodate(pg); SetPageError(pg); } else { SetPageUptodate(pg); ClearPageError(pg); } flush_dcache_page(pg); kunmap(pg); T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage done\n")); return ret; } static int yaffs_readpage_unlock(struct file *f, struct page *pg) { int ret = yaffs_readpage_nolock(f,pg); UnlockPage(pg); return ret; } static int yaffs_readpage(struct file *f, struct page * pg) { return yaffs_readpage_unlock(f,pg); } // writepage inspired by/stolen from smbfs // #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_writepage(struct page *page, struct writeback_control *wbc) #else static int yaffs_writepage(struct page *page) #endif { struct address_space *mapping = page->mapping; struct inode *inode; unsigned long end_index; char *buffer; yaffs_Object *obj; int nWritten = 0; unsigned nBytes; if (!mapping) BUG(); inode = mapping->host; if (!inode) BUG(); end_index = inode->i_size >> PAGE_CACHE_SHIFT; /* easy case */ if (page->index < end_index) { nBytes = PAGE_CACHE_SIZE; } else { nBytes = inode->i_size & (PAGE_CACHE_SIZE-1); } // What's happening here? ///* OK, are we completely out? */ //if (page->index >= end_index+1 || !offset) // return -EIO; get_page(page); buffer = kmap(page); obj = yaffs_InodeToObject(inode); yaffs_GrossLock(obj->myDev); nWritten = yaffs_WriteDataToFile(obj,buffer,page->index << PAGE_CACHE_SHIFT,nBytes,0); yaffs_GrossUnlock(obj->myDev); kunmap(page); SetPageUptodate(page); UnlockPage(page); put_page(page); return (nWritten == nBytes) ? 0 : -ENOSPC; } static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_prepair_write\n")); if(!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE)) return yaffs_readpage_nolock(f,pg); return 0; } static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to) { void *addr = page_address(pg) + offset; loff_t pos = (((loff_t)pg->index) << PAGE_CACHE_SHIFT) + offset; int nBytes = to - offset; int nWritten; unsigned spos = pos; unsigned saddr = (unsigned)addr; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write addr %x pos %x nBytes %d\n",saddr,spos,nBytes)); nWritten = yaffs_file_write(f,addr, nBytes, &pos); if(nWritten != nBytes) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write not same size nWritten %d nBytes %d\n",nWritten,nBytes)); SetPageError(pg); ClearPageUptodate(pg); } else { SetPageUptodate(pg); } T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write returning %d\n",nWritten)); return nWritten; } static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj) { if (inode && obj) { inode->i_ino = obj->objectId; inode->i_mode = obj->yst_mode; inode->i_uid = obj->yst_uid; inode->i_gid = obj->yst_gid; inode->i_blksize = inode->i_sb->s_blocksize; //#if defined(CONFIG_KERNEL_2_5) #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) inode->i_rdev = old_decode_dev(obj->yst_rdev); inode->i_atime.tv_sec = (time_t)(obj->yst_atime); inode->i_atime.tv_nsec = 0; inode->i_mtime.tv_sec = (time_t)obj->yst_mtime; inode->i_mtime.tv_nsec =0; inode->i_ctime.tv_sec = (time_t)obj->yst_ctime; inode->i_ctime.tv_nsec = 0; #else inode->i_rdev = obj->yst_rdev; inode->i_atime = obj->yst_atime; inode->i_mtime = obj->yst_mtime; inode->i_ctime = obj->yst_ctime; #endif inode->i_size = yaffs_GetObjectFileLength(obj); inode->i_blocks = (inode->i_size + 511) >> 9; inode->i_nlink = yaffs_GetObjectLinkCount(obj); T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FillInode mode %x uid %d gid %d size %d count %d\n", inode->i_mode, inode->i_uid, inode->i_gid, (int)inode->i_size, atomic_read(&inode->i_count))); switch (obj->yst_mode & S_IFMT) { default: // fifo, device or socket #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) init_special_inode(inode, obj->yst_mode,old_decode_dev(obj->yst_rdev)); #else init_special_inode(inode, obj->yst_mode,(dev_t)(obj->yst_rdev)); #endif break; case S_IFREG: // file inode->i_op = &yaffs_file_inode_operations; inode->i_fop = &yaffs_file_operations; inode->i_mapping->a_ops = &yaffs_file_address_operations; break; case S_IFDIR: // directory inode->i_op = &yaffs_dir_inode_operations; inode->i_fop = &yaffs_dir_operations; break; case S_IFLNK: // symlink inode->i_op = &yaffs_symlink_inode_operations; break; } inode->u.generic_ip = obj; obj->myInode = inode; } else { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FileInode invalid parameters\n")); } } struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj) { struct inode * inode; if(!sb) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL super_block!!\n")); return NULL; } if(!obj) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL object!!\n")); return NULL; } T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for object %d\n",obj->objectId)); inode = iget(sb,obj->objectId); // NB Side effect: iget calls back to yaffs_read_inode(). // iget also increments the inode's i_count return inode; } #if 0 // No longer used because we use generic rw */ static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos) { yaffs_Object *obj; int nRead,ipos; struct inode *inode; yaffs_Device *dev; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read\n")); obj = yaffs_DentryToObject(f->f_dentry); dev = obj->myDev; yaffs_GrossLock(dev); inode = f->f_dentry->d_inode; if (*pos < inode->i_size) { if (*pos + n > inode->i_size) { n = inode->i_size - *pos; } } else { n = 0; } nRead = yaffs_ReadDataFromFile(obj,buf,*pos,n); if(nRead > 0) { f->f_pos += nRead; } yaffs_GrossUnlock(dev); ipos = *pos; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read read %d bytes, %d read at %d\n",n,nRead,ipos)); return nRead; } #endif static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos) { yaffs_Object *obj; int nWritten,ipos; struct inode *inode; yaffs_Device *dev; obj = yaffs_DentryToObject(f->f_dentry); dev = obj->myDev; yaffs_GrossLock(dev); inode = f->f_dentry->d_inode; if(!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) { ipos = inode->i_size; } else { ipos = *pos; } if(!obj) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write: hey obj is null!\n")); } else { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write about to write writing %d bytes to object %d at %d\n",n,obj->objectId,ipos)); } nWritten = yaffs_WriteDataToFile(obj,buf,ipos,n,0); T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write writing %d bytes, %d written at %d\n",n,nWritten,ipos)); if(nWritten > 0) { ipos += nWritten; *pos = ipos; if(ipos > inode->i_size) { inode->i_size = ipos; inode->i_blocks = (ipos + 511)>>9; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write size updated to %d bytes, %d blocks\n",ipos,(int)(inode->i_blocks))); } } yaffs_GrossUnlock(dev); return nWritten != n ? -ENOSPC : nWritten; } static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) { yaffs_Object *obj; yaffs_Device *dev; struct inode *inode = f->f_dentry->d_inode; unsigned long offset, curoffs; struct list_head *i; yaffs_Object *l; char name[YAFFS_MAX_NAME_LENGTH +1]; obj = yaffs_DentryToObject(f->f_dentry); dev = obj->myDev; yaffs_GrossLock(dev); offset = f->f_pos; T(YAFFS_TRACE_OS,("yaffs_readdir: starting at %d\n",(int)offset)); if(offset == 0) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry . ino %d \n",(int)inode->i_ino)); if(filldir(dirent,".",1,offset,inode->i_ino,DT_DIR) < 0) { goto out; } offset++; f->f_pos++; } if(offset == 1) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry .. ino %d \n",(int)f->f_dentry->d_parent->d_inode->i_ino)); if(filldir(dirent,"..",2,offset,f->f_dentry->d_parent->d_inode->i_ino,DT_DIR) < 0) { goto out; } offset++; f->f_pos++; } curoffs = 1; list_for_each(i,&obj->variant.directoryVariant.children) { curoffs++; if(curoffs >= offset) { l = list_entry(i, yaffs_Object,siblings); yaffs_GetObjectName(l,name,YAFFS_MAX_NAME_LENGTH+1); T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: %s inode %d\n",name,yaffs_GetObjectInode(l))); if(filldir(dirent, name, strlen(name), offset, yaffs_GetObjectInode(l), yaffs_GetObjectType(l)) < 0) { goto up_and_out; } offset++; f->f_pos++; } } up_and_out: out: yaffs_GrossUnlock(dev); return 0; } /* * File creation. Allocate an inode, and we're done.. */ //#if defined(CONFIG_KERNEL_2_5) #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) #else static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev) #endif { struct inode *inode; yaffs_Object *obj = NULL; yaffs_Device *dev; yaffs_Object *parent = yaffs_InodeToObject(dir); int error = -ENOSPC; if(parent) { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: parent object %d type %d\n", parent->objectId,parent->variantType)); } else { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: could not get parent object\n")); return -EPERM; } T(YAFFS_TRACE_OS,("yaffs_mknod: making oject for %s, mode %x dev %x\n", dentry->d_name.name, mode,rdev)); dev = parent->myDev; yaffs_GrossLock(dev); switch (mode & S_IFMT) { default: // Special (socket, fifo, device...) T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making special\n")); #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,old_encode_dev(rdev)); #else obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,rdev); #endif break; case S_IFREG: // file T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n")); obj = yaffs_MknodFile(parent,dentry->d_name.name,mode,current->uid, current->gid); break; case S_IFDIR: // directory T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making directory\n")); obj = yaffs_MknodDirectory(parent,dentry->d_name.name,mode,current->uid, current->gid); break; case S_IFLNK: // symlink T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n")); obj = NULL; // Do we ever get here? break; } if(obj) { inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); d_instantiate(dentry, inode); T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod created object %d count = %d\n",obj->objectId,atomic_read(&inode->i_count))); error = 0; } else { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod failed making object\n")); error = -ENOMEM; } yaffs_GrossUnlock(dev); return error; } static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode) { int retVal; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mkdir\n")); retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0); #if 0 // attempt to fix dir bug - didn't work if(!retVal) { dget(dentry); } #endif return retVal; } //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n) #else static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode) #endif { T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_create\n")); return yaffs_mknod(dir, dentry, mode | S_IFREG, 0); } static int yaffs_unlink(struct inode * dir, struct dentry *dentry) { int retVal; yaffs_Device *dev; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_unlink %d:%s\n",(int)(dir->i_ino),dentry->d_name.name)); dev = yaffs_InodeToObject(dir)->myDev; yaffs_GrossLock(dev); retVal = yaffs_Unlink(yaffs_InodeToObject(dir),dentry->d_name.name); yaffs_GrossUnlock(dev); if( retVal == YAFFS_OK) { dentry->d_inode->i_nlink--; mark_inode_dirty(dentry->d_inode); return 0; } else { return -ENOTEMPTY; } } /* * Create a link... */ static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry) { struct inode *inode = old_dentry->d_inode; yaffs_Object *obj = NULL; yaffs_Object *link=NULL; yaffs_Device *dev; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link\n")); obj = yaffs_InodeToObject(inode); dev = obj->myDev; yaffs_GrossLock(dev); if (!S_ISDIR(inode->i_mode)) // Don't link directories { link = yaffs_Link(yaffs_InodeToObject(dir),dentry->d_name.name,obj); } if(link) { old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj); d_instantiate(dentry, old_dentry->d_inode); atomic_inc(&old_dentry->d_inode->i_count); T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link link count %d i_count %d\n", old_dentry->d_inode->i_nlink,atomic_read(&old_dentry->d_inode->i_count))); } yaffs_GrossUnlock(dev); if(link) { return 0; } return -EPERM; } static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname) { yaffs_Object *obj; yaffs_Device *dev; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_symlink\n")); dev = yaffs_InodeToObject(dir)->myDev; yaffs_GrossLock(dev); obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name, S_IFLNK | S_IRWXUGO, current->uid, current->gid, symname); yaffs_GrossUnlock(dev); if(obj) { struct inode* inode; inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); d_instantiate(dentry, inode); T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink created OK\n")); return 0; } else { T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink not created\n")); } return -ENOMEM; } static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync) { yaffs_Object *obj; yaffs_Device *dev; obj = yaffs_DentryToObject(dentry); dev = obj->myDev; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_sync_object\n")); yaffs_GrossLock(dev); yaffs_FlushFile(obj,1); yaffs_GrossUnlock(dev); return 0; } /* * The VFS layer already does all the dentry stuff for rename. * * NB: POSIX says you can rename an object over an old object of the same name */ static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry) { yaffs_Device *dev; int retVal = YAFFS_FAIL; int removed = 0; yaffs_Object *target; dev = yaffs_InodeToObject(old_dir)->myDev; yaffs_GrossLock(dev); // Check if the target is an existing directory that is not empty. target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),new_dentry->d_name.name); if(target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && !list_empty(&target->variant.directoryVariant.children)) { retVal = YAFFS_FAIL; } else { // Unlink the target if it exists removed = yaffs_Unlink(yaffs_InodeToObject(new_dir),new_dentry->d_name.name); retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),old_dentry->d_name.name, yaffs_InodeToObject(new_dir),new_dentry->d_name.name); } yaffs_GrossUnlock(dev); if(retVal == YAFFS_OK) { if(removed == YAFFS_OK) { new_dentry->d_inode->i_nlink--; mark_inode_dirty(new_dentry->d_inode); } return 0; } else { return -ENOTEMPTY; } } static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) { struct inode *inode = dentry->d_inode; int error; yaffs_Device *dev; T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_setattr of object %d\n",yaffs_InodeToObject(inode)->objectId)); if((error = inode_change_ok(inode,attr)) == 0) { dev = yaffs_InodeToObject(inode)->myDev; yaffs_GrossLock(dev); if(yaffs_SetAttributes(yaffs_InodeToObject(inode),attr) == YAFFS_OK) { error = 0; } else { error = -EPERM; } yaffs_GrossUnlock(dev); if (!error) error = inode_setattr(inode,attr); } return error; } //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf) #else static int yaffs_statfs(struct super_block *sb, struct statfs *buf) #endif { yaffs_Device *dev = yaffs_SuperToDevice(sb); T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_statfs\n")); yaffs_GrossLock(dev); buf->f_type = YAFFS_MAGIC; buf->f_bsize = sb->s_blocksize; buf->f_namelen = 255; if(sb->s_blocksize > dev->nBytesPerChunk) { buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock/ (sb->s_blocksize/dev->nBytesPerChunk); buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev)/ (sb->s_blocksize/dev->nBytesPerChunk); } else { buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock * (dev->nBytesPerChunk/sb->s_blocksize); buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev) * (dev->nBytesPerChunk/sb->s_blocksize); } buf->f_files = 0; buf->f_ffree = 0; buf->f_bavail = buf->f_bfree; yaffs_GrossUnlock(dev); return 0; } static void yaffs_read_inode (struct inode *inode) { // NB This is called as a side effect of other functions and // thus gross locking should always be in place already. yaffs_Object *obj ; yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb); T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_read_inode for %d\n",(int)inode->i_ino)); obj = yaffs_FindObjectByNumber(dev,inode->i_ino); yaffs_FillInodeFromObject(inode,obj); } static LIST_HEAD(yaffs_dev_list); static void yaffs_put_super(struct super_block *sb) { yaffs_Device *dev = yaffs_SuperToDevice(sb); yaffs_GrossLock(dev); if(dev->putSuperFunc) { dev->putSuperFunc(sb); } yaffs_Deinitialise(dev); yaffs_GrossUnlock(dev); /* we assume this is protected by lock_kernel() in mount/umount */ list_del(&dev->devList); kfree(dev); } #ifdef CONFIG_YAFFS_MTD_ENABLED static void yaffs_MTDPutSuper(struct super_block *sb) { struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice; if(mtd->sync) { mtd->sync(mtd); } put_mtd_device(mtd); } #endif static struct super_block *yaffs_internal_read_super(int yaffsVersion,int useRam, struct super_block * sb, void * data, int silent) { int nBlocks; struct inode * inode = NULL; struct dentry * root; yaffs_Device *dev = 0; int err; sb->s_magic = YAFFS_MAGIC; sb->s_op = &yaffs_super_ops; if(!sb) printk(KERN_INFO"yaffs: sb is NULL\n"); else if(!sb->s_dev) printk(KERN_INFO"yaffs: sb->s_dev is NULL\n"); else if(! kdevname(sb->s_dev)) printk(KERN_INFO"yaffs: kdevname is NULL\n"); else printk(KERN_INFO"yaffs: dev is %d name is \"%s\"\n", sb->s_dev, kdevname(sb->s_dev)); #ifdef CONFIG_YAFFS_USE_CHUNK_SIZE sb->s_blocksize = YAFFS_BYTES_PER_CHUNK; sb->s_blocksize_bits = YAFFS_CHUNK_SIZE_SHIFT; #else sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; #endif T(YAFFS_TRACE_OS,("yaffs_read_super: Using yaffs%d\n",yaffsVersion)); T(YAFFS_TRACE_OS,("yaffs_read_super: %s block size %d\n", useRam ? "RAM" : "MTD",(int)(sb->s_blocksize))); #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY T(YAFFS_TRACE_OS,("yaffs: Write verification disabled. All guarantees null and void\n")); #endif if(useRam) { #ifdef CONFIG_YAFFS_RAM_ENABLED // Set the yaffs_Device up for ram emulation #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL); #else sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL); #endif if(!dev) { // Deep shit could not allocate device structure T(YAFFS_TRACE_OS,("yaffs_read_super: Failed trying to allocate yaffs_Device.\n")); return NULL; } memset(dev,0,sizeof(yaffs_Device)); dev->genericDevice = NULL; // Not used for RAM emulation. dev->name = sb->s_type->name; nBlocks = YAFFS_RAM_EMULATION_SIZE / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK); dev->startBlock = 0; dev->endBlock = nBlocks - 1; dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK; dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK; dev->nReservedBlocks = 5; if(yaffsVersion == 2) { dev->writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND; dev->readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND; dev->markNANDBlockBad = nandemul2k_MarkNANDBlockBad; dev->queryNANDBlock = nandemul2k_QueryNANDBlock; dev->eraseBlockInNAND = nandemul2k_EraseBlockInNAND; dev->initialiseNAND = nandemul2k_InitialiseNAND; dev->isYaffs2 = 1; dev->nChunksPerBlock = nandemul2k_GetChunksPerBlock(); dev->nBytesPerChunk = nandemul2k_GetBytesPerChunk();; nBlocks = nandemul2k_GetNumberOfBlocks(); dev->startBlock = 0; dev->endBlock = nBlocks - 1; } else { dev->writeChunkToNAND = nandemul_WriteChunkToNAND; dev->readChunkFromNAND = nandemul_ReadChunkFromNAND; dev->eraseBlockInNAND = nandemul_EraseBlockInNAND; dev->initialiseNAND = nandemul_InitialiseNAND; dev->isYaffs2 = 0; } #endif } else { #ifdef CONFIG_YAFFS_MTD_ENABLED struct mtd_info *mtd; T(YAFFS_TRACE_ALWAYS,("yaffs: Attempting MTD mount on %u.%u, \"%s\"\n", MAJOR(sb->s_dev),MINOR(sb->s_dev),kdevname(sb->s_dev))); // Check it's an mtd device..... if(MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) { return NULL; // This isn't an mtd device } // Get the device mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); if (!mtd) { T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device #%u doesn't appear to exist\n", MINOR(sb->s_dev))); return NULL; } // Check it's NAND if(mtd->type != MTD_NANDFLASH) { T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device is not NAND it's type %d\n", mtd->type)); return NULL; } T(YAFFS_TRACE_OS,(" erase %p\n",mtd->erase)); T(YAFFS_TRACE_OS,(" read %p\n",mtd->read)); T(YAFFS_TRACE_OS,(" write %p\n",mtd->write)); T(YAFFS_TRACE_OS,(" readoob %p\n",mtd->read_oob)); T(YAFFS_TRACE_OS,(" writeoob %p\n",mtd->write_oob)); T(YAFFS_TRACE_OS,(" block_isbad %p\n",mtd->block_isbad)); T(YAFFS_TRACE_OS,(" block_markbad %p\n",mtd->block_markbad)); T(YAFFS_TRACE_OS,(" oobblock %d\n",mtd->oobblock)); T(YAFFS_TRACE_OS,(" oobsize %d\n",mtd->oobsize)); T(YAFFS_TRACE_OS,(" erasesize %d\n",mtd->erasesize)); T(YAFFS_TRACE_OS,(" size %d\n",mtd->size)); if(yaffsVersion == 2) { // Check for version 2 style functions if(!mtd->erase || !mtd->block_isbad || !mtd->block_markbad || !mtd->read || !mtd->write || #ifndef CONFIG_YAFFS_USE_OLD_MTD !mtd->write_ecc || !mtd->read_ecc || #endif !mtd->read_oob || !mtd->write_oob ) { T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));; return NULL; } if(mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE || mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) { T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n")); return NULL; } } else { // Check for V1 style functions if(!mtd->erase || !mtd->read || !mtd->write || #ifndef CONFIG_YAFFS_USE_OLD_MTD !mtd->write_ecc || !mtd->read_ecc || #endif !mtd->read_oob || !mtd->write_oob ) { T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));; return NULL; } if(mtd->oobblock != YAFFS_BYTES_PER_CHUNK || mtd->oobsize != YAFFS_BYTES_PER_SPARE) { T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n")); return NULL; } } // OK, so if we got here, we have an MTD that's NAND and looks // like it has the right capabilities // Set the yaffs_Device up for mtd //#if defined(CONFIG_KERNEL_2_5) #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL); #else sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL); #endif if(!dev) { // Deep shit could not allocate device structure T(YAFFS_TRACE_ALWAYS,("yaffs_read_super: Failed trying to allocate yaffs_Device. \n")); return NULL; } memset(dev,0,sizeof(yaffs_Device)); dev->genericDevice = mtd; dev->name = mtd->name; // Set up the memory size parameters.... nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK); dev->startBlock = 0; dev->endBlock = nBlocks - 1; dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK; dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK; dev->nReservedBlocks = 5; dev->nShortOpCaches = 10; // Enable short op caching // ... and the functions. if(yaffsVersion == 2) { dev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND; dev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND; dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad; dev->queryNANDBlock = nandmtd2_QueryNANDBlock; dev->spareBuffer = YMALLOC(mtd->oobsize); dev->isYaffs2 = 1; dev->nBytesPerChunk = mtd->oobblock; dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock; nBlocks = mtd->size / mtd->erasesize; dev->startBlock = 0; dev->endBlock = nBlocks - 1; } else { dev->writeChunkToNAND = nandmtd_WriteChunkToNAND; dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND; dev->isYaffs2 = 0; } // ... and common functions dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND; dev->initialiseNAND = nandmtd_InitialiseNAND; dev->putSuperFunc = yaffs_MTDPutSuper; #ifdef CONFIG_YAFFS_USE_NANDECC dev->useNANDECC = 1; #endif #endif } /* we assume this is protected by lock_kernel() in mount/umount */ list_add_tail(&dev->devList, &yaffs_dev_list); init_MUTEX(&dev->grossLock); yaffs_GrossLock(dev); err = yaffs_GutsInitialise(dev); T(YAFFS_TRACE_OS,("yaffs_read_super: guts initialised %s\n", (err == YAFFS_OK) ? "OK" : "FAILED")); // Create root inode if(err == YAFFS_OK) inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,yaffs_Root(dev)); yaffs_GrossUnlock(dev); if (!inode) return NULL; // added NCB inode->i_op = & yaffs_dir_inode_operations; inode->i_fop = & yaffs_dir_operations; T(YAFFS_TRACE_OS,("yaffs_read_super: got root inode\n")); root = d_alloc_root(inode); T(YAFFS_TRACE_OS,("yaffs_read_super: d_alloc_root done\n")); if (!root) { iput(inode); return NULL; } sb->s_root = root; T(YAFFS_TRACE_OS,("yaffs_read_super: done\n")); return sb; } #ifdef CONFIG_YAFFS_MTD_ENABLED #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_internal_read_super_mtd(struct super_block * sb, void * data, int silent) { return yaffs_internal_read_super(1,0,sb,data,silent) ? 0 : -1; } static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data) { return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_mtd); } /* changes NCB 2.5.70 */ //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV); static struct file_system_type yaffs_fs_type = { .owner = THIS_MODULE, .name = "yaffs", .get_sb = yaffs_read_super, .kill_sb = kill_block_super, // .kill_sb = kill_litter_super, .fs_flags = FS_REQUIRES_DEV, }; #else static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent) { return yaffs_internal_read_super(1,0,sb,data,silent); } static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV); #endif #endif // CONFIG_YAFFS_MTD_ENABLED #ifdef CONFIG_YAFFS2_MTD_ENABLED #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs2_internal_read_super_mtd(struct super_block * sb, void * data, int silent) { return yaffs_internal_read_super(2,0,sb,data,silent) ? 0 : -1; } static struct super_block *yaffs2_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data) { return get_sb_bdev(fs, flags, dev_name, data, yaffs2_internal_read_super_mtd); } /* changes NCB 2.5.70 */ //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV); static struct file_system_type yaffs2_fs_type = { .owner = THIS_MODULE, .name = "yaffs2", .get_sb = yaffs2_read_super, .kill_sb = kill_block_super, // .kill_sb = kill_litter_super, .fs_flags = FS_REQUIRES_DEV, }; #else static struct super_block *yaffs2_read_super(struct super_block * sb, void * data, int silent) { return yaffs_internal_read_super(2,0,sb,data,silent); } static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, FS_REQUIRES_DEV); #endif #endif // CONFIG_YAFFS2_MTD_ENABLED #ifdef CONFIG_YAFFS_RAM_ENABLED #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs_internal_read_super_ram(struct super_block * sb, void * data, int silent) { return yaffs_internal_read_super(1,1,sb,data,silent) ? 0 : -1; } static struct super_block *yaffs_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data) { return get_sb_nodev(fs, flags, data, yaffs_internal_read_super_ram); } static struct file_system_type yaffs_ram_fs_type = { .owner = THIS_MODULE, .name = "yaffsram", .get_sb = yaffs_ram_read_super, .kill_sb = kill_litter_super, .fs_flags = 0 , }; #else static struct super_block *yaffs_ram_read_super(struct super_block * sb, void * data, int silent) { return yaffs_internal_read_super(1,1,sb,data,silent); } static DECLARE_FSTYPE(yaffs_ram_fs_type, "yaffsram", yaffs_ram_read_super, FS_SINGLE); #endif #endif // CONFIG_YAFFS_RAM_ENABLED #ifdef CONFIG_YAFFS2_RAM_ENABLED #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) static int yaffs2_internal_read_super_ram(struct super_block * sb, void * data, int silent) { return yaffs_internal_read_super(2,1,sb,data,silent) ? 0 : -1; } static struct super_block *yaffs2_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data) { return get_sb_nodev(fs, flags, data, yaffs2_internal_read_super_ram); } static struct file_system_type yaffs2_ram_fs_type = { .owner = THIS_MODULE, .name = "yaffs2ram", .get_sb = yaffs2_ram_read_super, .kill_sb = kill_litter_super, .fs_flags = 0 , }; #else static struct super_block *yaffs2_ram_read_super(struct super_block * sb, void * data, int silent) { return yaffs_internal_read_super(2,1,sb,data,silent); } static DECLARE_FSTYPE(yaffs2_ram_fs_type, "yaffs2ram", yaffs2_ram_read_super, FS_SINGLE); #endif #endif // CONFIG_YAFFS2_RAM_ENABLED static struct proc_dir_entry *my_proc_entry; static struct proc_dir_entry *my_proc_ram_write_entry; static char * yaffs_dump_dev(char *buf,yaffs_Device *dev) { buf +=sprintf(buf,"startBlock......... %d\n",dev->startBlock); buf +=sprintf(buf,"endBlock........... %d\n",dev->endBlock); buf +=sprintf(buf,"chunkGroupBits..... %d\n",dev->chunkGroupBits); buf +=sprintf(buf,"chunkGroupSize..... %d\n",dev->chunkGroupSize); buf +=sprintf(buf,"nErasedBlocks...... %d\n",dev->nErasedBlocks); buf +=sprintf(buf,"nTnodesCreated..... %d\n",dev->nTnodesCreated); buf +=sprintf(buf,"nFreeTnodes........ %d\n",dev->nFreeTnodes); buf +=sprintf(buf,"nObjectsCreated.... %d\n",dev->nObjectsCreated); buf +=sprintf(buf,"nFreeObjects....... %d\n",dev->nFreeObjects); buf +=sprintf(buf,"nFreeChunks........ %d\n",dev->nFreeChunks); buf +=sprintf(buf,"nPageWrites........ %d\n",dev->nPageWrites); buf +=sprintf(buf,"nPageReads......... %d\n",dev->nPageReads); buf +=sprintf(buf,"nBlockErasures..... %d\n",dev->nBlockErasures); buf +=sprintf(buf,"nGCCopies.......... %d\n",dev->nGCCopies); buf +=sprintf(buf,"garbageCollections. %d\n",dev->garbageCollections); buf +=sprintf(buf,"passiveGCs......... %d\n",dev->passiveGarbageCollections); buf +=sprintf(buf,"nRetriedWrites..... %d\n",dev->nRetriedWrites); buf +=sprintf(buf,"nRetireBlocks...... %d\n",dev->nRetiredBlocks); buf +=sprintf(buf,"eccFixed........... %d\n",dev->eccFixed); buf +=sprintf(buf,"eccUnfixed......... %d\n",dev->eccUnfixed); buf +=sprintf(buf,"tagsEccFixed....... %d\n",dev->tagsEccFixed); buf +=sprintf(buf,"tagsEccUnfixed..... %d\n",dev->tagsEccUnfixed); buf +=sprintf(buf,"cacheHits.......... %d\n",dev->cacheHits); buf +=sprintf(buf,"nDeletedFiles...... %d\n",dev->nDeletedFiles); buf +=sprintf(buf,"nUnlinkedFiles..... %d\n",dev->nUnlinkedFiles); buf +=sprintf(buf,"nBackgroudDeletions %d\n",dev->nBackgroundDeletions); buf +=sprintf(buf,"useNANDECC......... %d\n",dev->useNANDECC); buf +=sprintf(buf,"isYaffs2........... %d\n",dev->isYaffs2); return buf; } static int yaffs_proc_read( char *page, char **start, off_t offset, int count, int *eof, void *data ) { struct list_head *item; char *buf = page; int step = offset; int n = 0; /* Get proc_file_read() to step 'offset' by one on each sucessive call. * We use 'offset' (*ppos) to indicate where we are in devList. * This also assumes the user has posted a read buffer large * enough to hold the complete output; but that's life in /proc. */ *(int *)start = 1; /* Print header first */ if (step == 0) { buf += sprintf(buf, "YAFFS built:" __DATE__ " "__TIME__ "\n%s\n%s\n", yaffs_fs_c_version, yaffs_guts_c_version); } /* hold lock_kernel while traversing yaffs_dev_list */ lock_kernel(); /* Locate and print the Nth entry. Order N-squared but N is small. */ list_for_each(item, &yaffs_dev_list) { yaffs_Device *dev = list_entry(item, yaffs_Device, devList); if (n < step) { n++; continue; } buf += sprintf(buf,"\nDevice %d \"%s\"\n", n, dev->name); buf = yaffs_dump_dev(buf, dev); break; } unlock_kernel(); return buf-page < count ? buf-page : count; } static int yaffs_proc_ram_write( char *page, char **start, off_t offset, int count, int *eof, void *data ) { printk(KERN_DEBUG "yaffs write size %d\n",count); return count; } // Stuff to handle installation of file systems struct file_system_to_install { struct file_system_type *fst; int installed; }; static struct file_system_to_install fs_to_install[] = { #ifdef CONFIG_YAFFS_RAM_ENABLED { &yaffs_ram_fs_type, 0}, #endif #ifdef CONFIG_YAFFS2_RAM_ENABLED { &yaffs2_ram_fs_type,0}, #endif #ifdef CONFIG_YAFFS_MTD_ENABLED { &yaffs_fs_type,0}, #endif #ifdef CONFIG_YAFFS2_MTD_ENABLED { &yaffs2_fs_type,0}, #endif { NULL,0} }; static int __init init_yaffs_fs(void) { int error = 0; struct file_system_to_install *fsinst; T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " Installing. \n")); /* Install the proc_fs entry */ my_proc_entry = create_proc_read_entry("yaffs", S_IRUGO | S_IFREG, &proc_root, yaffs_proc_read, NULL); if(!my_proc_entry) { return -ENOMEM; } // Now add the file system entries fsinst = fs_to_install; while(fsinst->fst && !error) { error = register_filesystem(fsinst->fst); if(!error) { fsinst->installed = 1; } fsinst++; } // Any errors? uninstall if(error) { fsinst = fs_to_install; while(fsinst->fst) { if(fsinst->installed) { unregister_filesystem(fsinst->fst); fsinst->installed = 0; } fsinst++; } } return error; } static void __exit exit_yaffs_fs(void) { struct file_system_to_install *fsinst; T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " removing. \n")); remove_proc_entry("yaffs",&proc_root); fsinst = fs_to_install; while(fsinst->fst) { if(fsinst->installed) { unregister_filesystem(fsinst->fst); fsinst->installed = 0; } fsinst++; } } module_init(init_yaffs_fs) module_exit(exit_yaffs_fs) MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system"); MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002,2003,2004"); MODULE_LICENSE("GPL");