/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2010 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
+ * Copyright (C) 2002-2018 Aleph One Ltd.
*
* Created by Charles Manning <charles@aleph1.co.uk>
* Acknowledgements:
* the VFS.
*
* Special notes:
- * >> 2.4: sb->u.generic_sbp points to the yaffs_dev_t associated with
+ * >> 2.4: sb->u.generic_sbp points to the struct yaffs_dev associated with
* this superblock
- * >> 2.6: sb->s_fs_info points to the yaffs_dev_t associated with this
+ * >> 2.6: sb->s_fs_info points to the struct yaffs_dev associated with this
* superblock
- * >> inode->u.generic_ip points to the associated yaffs_obj_t.
+ * >> inode->u.generic_ip points to the associated struct yaffs_obj.
*/
/*
* for any version of Linux.
*/
#include <linux/version.h>
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0))
+#include <linux/iversion.h>
+#endif
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
#define YAFFS_COMPILE_BACKGROUND
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6, 23))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23))
#define YAFFS_COMPILE_FREEZER
#endif
#endif
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28))
#define YAFFS_COMPILE_EXPORTFS
#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
#define YAFFS_USE_SETATTR_COPY
#define YAFFS_USE_TRUNCATE_SETSIZE
#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
#define YAFFS_HAS_EVICT_INODE
#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) && \
+ (LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0))
#define YAFFS_NEW_FOLLOW_LINK 1
#else
#define YAFFS_NEW_FOLLOW_LINK 0
#endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
+#define YAFFS_HAS_WRITE_SUPER
+#endif
+
+
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
#include <linux/config.h>
#endif
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39))
#include <linux/smp_lock.h>
+#endif
#include <linux/pagemap.h>
#include <linux/mtd/mtd.h>
#include <linux/interrupt.h>
#include <linux/statfs.h>
#define UnlockPage(p) unlock_page(p)
-#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
+#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
/* FIXME: use sb->s_id instead ? */
-#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
#else
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
#define YPROC_ROOT (&proc_root)
#else
-#define YPROC_ROOT NULL
+#define YPROC_ROOT NULL
#endif
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
#define Y_INIT_TIMER(a) init_timer(a)
-#else
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
#define Y_INIT_TIMER(a) init_timer_on_stack(a)
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-#define WRITE_SIZE_STR "writesize"
-#define WRITE_SIZE(mtd) ((mtd)->writesize)
#else
-#define WRITE_SIZE_STR "oobblock"
-#define WRITE_SIZE(mtd) ((mtd)->oobblock)
+#define Y_INIT_TIMER(a,cb) timer_setup_on_stack(a,cb,0)
#endif
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
#define YAFFS_USE_WRITE_BEGIN_END 0
#endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
+#define YAFFS_SUPER_HAS_DIRTY
+#endif
+
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
+#define set_nlink(inode, count) do { (inode)->i_nlink = (count); } while(0)
+#endif
+
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
{
uint64_t result = partition_size;
do_div(result, block_size);
- return (uint32_t)result;
+ return (uint32_t) result;
}
#else
#define YCALCBLOCKS(s, b) ((s)/(b))
#include "yportenv.h"
#include "yaffs_trace.h"
#include "yaffs_guts.h"
-
+#include "yaffs_attribs.h"
#include "yaffs_linux.h"
-
#include "yaffs_mtdif.h"
-#include "yaffs_mtdif1.h"
-#include "yaffs_mtdif2.h"
+#include "yaffs_packedtags2.h"
+#include "yaffs_getblockinfo.h"
-unsigned int yaffs_trace_mask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS;
+unsigned int yaffs_trace_mask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS | 0;
unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
unsigned int yaffs_auto_checkpoint = 1;
unsigned int yaffs_gc_control = 1;
unsigned int yaffs_bg_enable = 1;
-
+unsigned int yaffs_auto_select = 1;
/* Module Parameters */
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
module_param(yaffs_trace_mask, uint, 0644);
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
/* use iget and read_inode */
#define Y_IGET(sb, inum) iget((sb), (inum))
-static void yaffs_read_inode(struct inode *inode);
#else
/* Call local equivalent */
#define YAFFS_USE_OWN_IGET
#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
#endif
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
#define yaffs_inode_to_obj_lv(iptr) ((iptr)->u.generic_ip)
#endif
-#define yaffs_inode_to_obj(iptr) ((yaffs_obj_t *)(yaffs_inode_to_obj_lv(iptr)))
+#define yaffs_inode_to_obj(iptr) \
+ ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
#define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode)
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-#define yaffs_super_to_dev(sb) ((yaffs_dev_t *)sb->s_fs_info)
-#else
-#define yaffs_super_to_dev(sb) ((yaffs_dev_t *)sb->u.generic_sbp)
-#endif
-
-
-#define update_dir_time(dir) do {\
- (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
- } while(0)
-
-static void yaffs_put_super(struct super_block *sb);
-
-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
- loff_t *pos);
-static ssize_t yaffs_hold_space(struct file *f);
-static void yaffs_release_space(struct file *f);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_file_flush(struct file *file, fl_owner_t id);
+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info)
#else
-static int yaffs_file_flush(struct file *file);
+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->u.generic_sbp)
#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-static int yaffs_sync_object(struct file *file, int datasync);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
+#define Y_CLEAR_INODE(i) clear_inode(i)
#else
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync);
+#define Y_CLEAR_INODE(i) end_writeback(i)
#endif
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
-
-#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);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
+#define YAFFS_USE_DIR_ITERATE
#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 (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);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 0))
+#define YAFFS_USE_XATTR
#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 (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_sync_fs(struct super_block *sb, int wait);
-static void yaffs_write_super(struct super_block *sb);
-#else
-static int yaffs_sync_fs(struct super_block *sb);
-static int yaffs_write_super(struct super_block *sb);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
+#define YAFFS_NEW_PROCFS
+#include <linux/seq_file.h>
#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0))
+#define PAGE_CACHE_SIZE PAGE_SIZE
+#define PAGE_CACHE_SHIFT PAGE_SHIFT
+#define Y_GET_DENTRY(f) ((f)->f_path.dentry)
+#define YAFFS_NEW_XATTR 1
+#define YAFFS_NEW_GET_LINK 1
#else
-static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
+#define Y_GET_DENTRY(f) ((f)->f_dentry)
+#define YAFFS_NEW_XATTR 0
+#define YAFFS_NEW_GET_LINK 0
#endif
-#ifdef YAFFS_HAS_PUT_INODE
-static void yaffs_put_inode(struct inode *inode);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0))
+#define page_cache_release put_page
#endif
-#ifdef YAFFS_HAS_EVICT_INODE
-static void yaffs_evict_inode(struct inode *);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,12,0))
+#define update_dir_time(dir) do {\
+ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
+ } while (0)
+#elif (LINUX_VERSION_CODE < KERNEL_VERSION(4,18,0))
+#define update_dir_time(dir) do {\
+ (dir)->i_ctime = (dir)->i_mtime = current_kernel_time(); \
+ } while (0)
#else
-static void yaffs_delete_inode(struct inode *);
-static void yaffs_clear_inode(struct inode *);
+#define update_dir_time(dir) do {\
+ (dir)->i_ctime = (dir)->i_mtime = current_kernel_time64(); \
+ } while (0)
#endif
-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);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 0))
+static inline int setattr_prepare(struct dentry *dentry, struct iattr *attr)
+{
+ return inode_change_ok(dentry->d_inode, attr);
+}
#endif
-#ifdef CONFIG_YAFFS_XATTR
-int yaffs_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags);
-ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
- size_t size);
-int yaffs_removexattr(struct dentry *dentry, const char *name);
-ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size);
-#endif
+static void yaffs_fill_inode_from_obj(struct inode *inode,
+ struct yaffs_obj *obj);
-#if (YAFFS_USE_WRITE_BEGIN_END != 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata);
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata);
-#else
-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 void yaffs_gross_lock(struct yaffs_dev *dev)
+{
+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current);
+ mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock));
+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current);
+}
-#endif
+static void yaffs_gross_unlock(struct yaffs_dev *dev)
+{
+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current);
+ mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
+}
-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
- int buflen);
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
-void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
-#else
-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
-#endif
-static void yaffs_touch_super(yaffs_dev_t *dev);
+static int yaffs_readpage_nolock(struct file *f, struct page *pg)
+{
+ /* Lifted from jffs2 */
-static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin);
+ struct yaffs_obj *obj;
+ unsigned char *pg_buf;
+ int ret;
+ loff_t pos = ((loff_t) pg->index) << PAGE_SHIFT;
+ struct yaffs_dev *dev;
-static int yaffs_vfs_setattr(struct inode *, struct iattr *);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readpage_nolock at %lld, size %08x",
+ (long long)pos,
+ (unsigned)PAGE_SIZE);
+ obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
-static struct address_space_operations yaffs_file_address_operations = {
- .readpage = yaffs_readpage,
- .writepage = yaffs_writepage,
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
- .write_begin = yaffs_write_begin,
- .write_end = yaffs_write_end,
+ dev = obj->my_dev;
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ BUG_ON(!PageLocked(pg));
#else
- .prepare_write = yaffs_prepare_write,
- .commit_write = yaffs_commit_write,
+ if (!PageLocked(pg))
+ PAGE_BUG(pg);
#endif
-};
+ pg_buf = kmap(pg);
+ /* FIXME: Can kmap fail? */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
-static const struct file_operations yaffs_file_operations = {
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
- .splice_read = generic_file_splice_read,
- .splice_write = generic_file_splice_write,
- .llseek = generic_file_llseek,
-};
+ yaffs_gross_lock(dev);
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+ ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
-static const struct file_operations yaffs_file_operations = {
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
- .sendfile = generic_file_sendfile,
-};
+ yaffs_gross_unlock(dev);
-#else
+ if (ret >= 0)
+ ret = 0;
-static const 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,
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- .sendfile = generic_file_sendfile,
-#endif
-};
-#endif
+ if (ret) {
+ ClearPageUptodate(pg);
+ SetPageError(pg);
+ } else {
+ SetPageUptodate(pg);
+ ClearPageError(pg);
+ }
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
-static void zero_user_segment(struct page *page, unsigned start, unsigned end)
-{
- void * kaddr = kmap_atomic(page, KM_USER0);
- memset(kaddr + start, 0, end - start);
- kunmap_atomic(kaddr, KM_USER0);
- flush_dcache_page(page);
-}
-#endif
+ flush_dcache_page(pg);
+ kunmap(pg);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done");
+ return ret;
+}
-static const struct inode_operations yaffs_file_inode_operations = {
- .setattr = yaffs_setattr,
-#ifdef CONFIG_YAFFS_XATTR
- .setxattr = yaffs_setxattr,
- .getxattr = yaffs_getxattr,
- .listxattr = yaffs_listxattr,
- .removexattr = yaffs_removexattr,
-#endif
-};
+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
+{
+ int ret = yaffs_readpage_nolock(f, pg);
+ UnlockPage(pg);
+ return ret;
+}
-static const struct inode_operations yaffs_symlink_inode_operations = {
- .readlink = yaffs_readlink,
- .follow_link = yaffs_follow_link,
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
- .put_link = yaffs_put_link,
-#endif
- .setattr = yaffs_setattr,
-#ifdef CONFIG_YAFFS_XATTR
- .setxattr = yaffs_setxattr,
- .getxattr = yaffs_getxattr,
- .listxattr = yaffs_listxattr,
- .removexattr = yaffs_removexattr,
-#endif
-};
+static int yaffs_readpage(struct file *f, struct page *pg)
+{
+ int ret;
-static const 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,
-#ifdef CONFIG_YAFFS_XATTR
- .setxattr = yaffs_setxattr,
- .getxattr = yaffs_getxattr,
- .listxattr = yaffs_listxattr,
- .removexattr = yaffs_removexattr,
-#endif
-};
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage");
+ ret = yaffs_readpage_unlock(f, pg);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done");
+ return ret;
+}
-static const struct file_operations yaffs_dir_operations = {
- .read = generic_read_dir,
- .readdir = yaffs_readdir,
- .fsync = yaffs_sync_object,
- .llseek = yaffs_dir_llseek,
-};
-static const struct super_operations yaffs_super_ops = {
- .statfs = yaffs_statfs,
+static void yaffs_set_super_dirty_val(struct yaffs_dev *dev, int val)
+{
+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-#ifndef YAFFS_USE_OWN_IGET
- .read_inode = yaffs_read_inode,
-#endif
-#ifdef YAFFS_HAS_PUT_INODE
- .put_inode = yaffs_put_inode,
-#endif
- .put_super = yaffs_put_super,
-#ifdef YAFFS_HAS_EVICT_INODE
- .evict_inode = yaffs_evict_inode,
-#else
- .delete_inode = yaffs_delete_inode,
- .clear_inode = yaffs_clear_inode,
-#endif
- .sync_fs = yaffs_sync_fs,
- .write_super = yaffs_write_super,
-};
+ if (lc)
+ lc->dirty = val;
+# ifdef YAFFS_SUPER_HAS_DIRTY
+ {
+ struct super_block *sb = lc->super;
-static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
-{
-#ifdef YAFFS_USE_SETATTR_COPY
- setattr_copy(inode,attr);
- return 0;
-#else
- return inode_setattr(inode, attr);
+ if (sb)
+ sb->s_dirt = val;
+ }
#endif
}
-static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
+static void yaffs_set_super_dirty(struct yaffs_dev *dev)
{
-#ifdef YAFFS_USE_TRUNCATE_SETSIZE
- truncate_setsize(inode,newsize);
- return 0;
-#else
- truncate_inode_pages(&inode->i_data,newsize);
- return 0;
-#endif
-
+ yaffs_set_super_dirty_val(dev, 1);
}
-static unsigned yaffs_gc_control_callback(yaffs_dev_t *dev)
-{
- return yaffs_gc_control;
-}
-
-static void yaffs_gross_lock(yaffs_dev_t *dev)
+static void yaffs_clear_super_dirty(struct yaffs_dev *dev)
{
- T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current));
- down(&(yaffs_dev_to_lc(dev)->gross_lock));
- T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current));
+ yaffs_set_super_dirty_val(dev, 0);
}
-static void yaffs_gross_unlock(yaffs_dev_t *dev)
+static int yaffs_check_super_dirty(struct yaffs_dev *dev)
{
- T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current));
- up(&(yaffs_dev_to_lc(dev)->gross_lock));
-}
+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-#ifdef YAFFS_COMPILE_EXPORTFS
+ if (lc && lc->dirty)
+ return 1;
-static struct inode *
-yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, uint32_t generation)
-{
- return Y_IGET(sb, ino);
-}
+# ifdef YAFFS_SUPER_HAS_DIRTY
+ {
+ struct super_block *sb = lc->super;
-static struct dentry *
-yaffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
-{
- return generic_fh_to_dentry(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode) ;
-}
+ if (sb && sb->s_dirt)
+ return 1;
+ }
+#endif
+ return 0;
-static struct dentry *
- yaffs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
-{
- return generic_fh_to_parent(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode);
}
-struct dentry *yaffs2_get_parent(struct dentry *dentry)
+#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 super_block *sb = dentry->d_inode->i_sb;
- struct dentry *parent = ERR_PTR(-ENOENT);
+ struct yaffs_dev *dev;
+ struct address_space *mapping = page->mapping;
struct inode *inode;
- unsigned long parent_ino;
- yaffs_obj_t *d_obj;
- yaffs_obj_t *parent_obj;
+ unsigned long end_index;
+ char *buffer;
+ struct yaffs_obj *obj;
+ int n_written = 0;
+ unsigned n_bytes;
+ loff_t i_size;
- d_obj = yaffs_inode_to_obj(dentry->d_inode);
+ if (!mapping)
+ BUG();
+ inode = mapping->host;
+ if (!inode)
+ BUG();
+ i_size = i_size_read(inode);
- if (d_obj) {
- parent_obj = d_obj->parent;
- if (parent_obj) {
- parent_ino = yaffs_get_obj_inode(parent_obj);
- inode = Y_IGET(sb, parent_ino);
+ end_index = i_size >> PAGE_CACHE_SHIFT;
- if (IS_ERR(inode)) {
- parent = ERR_CAST(inode);
- } else {
- parent = d_obtain_alias(inode);
- if (!IS_ERR(parent)) {
- parent = ERR_PTR(-ENOMEM);
- iput(inode);
- }
- }
+ if (page->index < end_index)
+ n_bytes = PAGE_CACHE_SIZE;
+ else {
+ n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
+
+ if (page->index > end_index || !n_bytes) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_writepage at %lld, inode size = %lld!!",
+ ((loff_t)page->index) << PAGE_CACHE_SHIFT,
+ inode->i_size);
+ yaffs_trace(YAFFS_TRACE_OS,
+ " -> don't care!!");
+
+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+ set_page_writeback(page);
+ unlock_page(page);
+ end_page_writeback(page);
+ return 0;
}
}
- return parent;
-}
+ if (n_bytes != PAGE_CACHE_SIZE)
+ zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE);
-/* Just declare a zero structure as a NULL value implies
- * using the default functions of exportfs.
- */
+ get_page(page);
-static struct export_operations yaffs_export_ops =
-{
- .fh_to_dentry = yaffs2_fh_to_dentry,
- .fh_to_parent = yaffs2_fh_to_parent,
- .get_parent = yaffs2_get_parent,
-} ;
+ buffer = kmap(page);
-#endif
+ obj = yaffs_inode_to_obj(inode);
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
-/*-----------------------------------------------------------------*/
-/* Directory search context allows us to unlock access to yaffs during
- * filldir without causing problems with the directory being modified.
- * This is similar to the tried and tested mechanism used in yaffs direct.
- *
- * A search context iterates along a doubly linked list of siblings in the
- * directory. If the iterating object is deleted then this would corrupt
- * the list iteration, likely causing a crash. The search context avoids
- * this by using the remove_obj_fn to move the search context to the
- * next object before the object is deleted.
- *
- * Many readdirs (and thus seach conexts) may be alive simulateously so
- * each yaffs_dev_t has a list of these.
- *
- * A seach context lives for the duration of a readdir.
- *
- * All these functions must be called while yaffs is locked.
- */
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_writepage at %lld, size %08x",
+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "writepag0: obj = %lld, ino = %lld",
+ obj->variant.file_variant.file_size, inode->i_size);
-struct yaffs_search_context {
- yaffs_dev_t *dev;
- yaffs_obj_t *dir_obj;
- yaffs_obj_t *next_return;
- struct ylist_head others;
-};
+ n_written = yaffs_wr_file(obj, buffer,
+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes, 0);
-/*
- * yaffs_new_search() creates a new search context, initialises it and
- * adds it to the device's search context list.
- *
- * Called at start of readdir.
- */
-static struct yaffs_search_context * yaffs_new_search(yaffs_obj_t *dir)
-{
- yaffs_dev_t *dev = dir->my_dev;
- struct yaffs_search_context *sc = YMALLOC(sizeof(struct yaffs_search_context));
- if(sc){
- sc->dir_obj = dir;
- sc->dev = dev;
- if( ylist_empty(&sc->dir_obj->variant.dir_variant.children))
- sc->next_return = NULL;
- else
- sc->next_return = ylist_entry(
- dir->variant.dir_variant.children.next,
- yaffs_obj_t,siblings);
- YINIT_LIST_HEAD(&sc->others);
- ylist_add(&sc->others,&(yaffs_dev_to_lc(dev)->search_contexts));
- }
- return sc;
-}
+ yaffs_set_super_dirty(dev);
-/*
- * yaffs_search_end() disposes of a search context and cleans up.
- */
-static void yaffs_search_end(struct yaffs_search_context * sc)
-{
- if(sc){
- ylist_del(&sc->others);
- YFREE(sc);
- }
-}
+ yaffs_trace(YAFFS_TRACE_OS,
+ "writepag1: obj = %lld, ino = %lld",
+ obj->variant.file_variant.file_size, inode->i_size);
-/*
- * yaffs_search_advance() moves a search context to the next object.
- * Called when the search iterates or when an object removal causes
- * the search context to be moved to the next object.
- */
-static void yaffs_search_advance(struct yaffs_search_context *sc)
-{
- if(!sc)
- return;
+ yaffs_gross_unlock(dev);
- if( sc->next_return == NULL ||
- ylist_empty(&sc->dir_obj->variant.dir_variant.children))
- sc->next_return = NULL;
- else {
- struct ylist_head *next = sc->next_return->siblings.next;
+ kunmap(page);
+ set_page_writeback(page);
+ unlock_page(page);
+ end_page_writeback(page);
+ put_page(page);
- if( next == &sc->dir_obj->variant.dir_variant.children)
- sc->next_return = NULL; /* end of list */
- else
- sc->next_return = ylist_entry(next,yaffs_obj_t,siblings);
- }
+ return (n_written == n_bytes) ? 0 : -ENOSPC;
}
-/*
- * yaffs_remove_obj_callback() is called when an object is unlinked.
- * We check open search contexts and advance any which are currently
- * on the object being iterated.
- */
-static void yaffs_remove_obj_callback(yaffs_obj_t *obj)
+/* Space holding and freeing is done to ensure we have space available for write_begin/end */
+/* For now we just assume few parallel writes and check against a small number. */
+/* Todo: need to do this with a counter to handle parallel reads better */
+
+static ssize_t yaffs_hold_space(struct file *f)
{
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
- struct ylist_head *i;
- struct yaffs_search_context *sc;
- struct ylist_head *search_contexts = &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
+ int n_free_chunks;
+ obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
- /* Iterate through the directory search contexts.
- * If any are currently on the object being removed, then advance
- * the search context to the next object to prevent a hanging pointer.
- */
- ylist_for_each(i, search_contexts) {
- if (i) {
- sc = ylist_entry(i, struct yaffs_search_context,others);
- if(sc->next_return == obj)
- yaffs_search_advance(sc);
- }
- }
+ dev = obj->my_dev;
-}
+ yaffs_gross_lock(dev);
+ n_free_chunks = yaffs_get_n_free_chunks(dev);
-/*-----------------------------------------------------------------*/
+ yaffs_gross_unlock(dev);
-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
- int buflen)
+ return (n_free_chunks > 20) ? 1 : 0;
+}
+
+static void yaffs_release_space(struct file *f)
{
- unsigned char *alias;
- int ret;
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
- yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev;
+ obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
- yaffs_gross_lock(dev);
+ dev = obj->my_dev;
- alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
+ yaffs_gross_lock(dev);
yaffs_gross_unlock(dev);
-
- if (!alias)
- return -ENOMEM;
-
- ret = vfs_readlink(dentry, buffer, buflen, alias);
- kfree(alias);
- return ret;
}
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
{
- void *ret;
+ struct page *pg = NULL;
+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+
+ int ret = 0;
+ int space_held = 0;
+
+ /* Get a page */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
+ pg = grab_cache_page_write_begin(mapping, index, flags);
#else
-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
- int ret
+ pg = __grab_cache_page(mapping, index);
#endif
- unsigned char *alias;
- int ret_int = 0;
- yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev;
- yaffs_gross_lock(dev);
+ *pagep = pg;
+ if (!pg) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ yaffs_trace(YAFFS_TRACE_OS,
+ "start yaffs_write_begin index %d(%x) uptodate %d",
+ (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0);
- alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
- yaffs_gross_unlock(dev);
+ /* Get fs space */
+ space_held = yaffs_hold_space(filp);
- if (!alias) {
- ret_int = -ENOMEM;
+ if (!space_held) {
+ ret = -ENOSPC;
goto out;
}
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
- nd_set_link(nd, alias);
- ret = alias;
-out:
- if(ret_int)
- ret = ERR_PTR(ret_int);
- return ret;
-#else
- ret = vfs_follow_link(nd, alias);
- kfree(alias);
+ /* Update page if required */
+
+ if (!Page_Uptodate(pg))
+ ret = yaffs_readpage_nolock(filp, pg);
+
+ if (ret)
+ goto out;
+
+ /* Happy path return */
+ yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok");
+
+ return 0;
+
out:
- if(ret_int)
- ret = ret_int;
+ yaffs_trace(YAFFS_TRACE_OS,
+ "end yaffs_write_begin fail returning %d", ret);
+ if (space_held)
+ yaffs_release_space(filp);
+ if (pg) {
+ unlock_page(pg);
+ page_cache_release(pg);
+ }
return ret;
-#endif
}
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
-void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) {
- kfree(alias);
+#else
+
+static int yaffs_prepare_write(struct file *f, struct page *pg,
+ unsigned offset, unsigned to)
+{
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_prepair_write");
+
+ if (!Page_Uptodate(pg))
+ return yaffs_readpage_nolock(f, pg);
+ return 0;
}
#endif
-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
- yaffs_obj_t *obj);
-
-/*
- * Lookup is used to find objects in the fs
- */
-#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
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+ loff_t * pos)
{
- yaffs_obj_t *obj;
- struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
+ struct yaffs_obj *obj;
+ int n_written;
+ loff_t ipos;
+ struct inode *inode;
+ struct yaffs_dev *dev;
- yaffs_dev_t *dev = yaffs_inode_to_obj(dir)->my_dev;
+ obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
- if(current != yaffs_dev_to_lc(dev)->readdir_process)
- yaffs_gross_lock(dev);
+ if (!obj) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write: hey obj is null!");
+ return -EINVAL;
+ }
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_lookup for %d:%s\n"),
- yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name));
+ dev = obj->my_dev;
- obj = yaffs_find_by_name(yaffs_inode_to_obj(dir),
- dentry->d_name.name);
+ yaffs_gross_lock(dev);
- obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
+ inode = Y_GET_DENTRY(f)->d_inode;
- /* Can't hold gross lock when calling yaffs_get_inode() */
- if(current != yaffs_dev_to_lc(dev)->readdir_process)
- yaffs_gross_unlock(dev);
+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
+ ipos = inode->i_size;
+ else
+ ipos = *pos;
- if (obj) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_lookup found %d\n"), obj->obj_id));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write about to write writing %u(%x) bytes to object %d at %lld",
+ (unsigned)n, (unsigned)n, obj->obj_id, ipos);
- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+ n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
- if (inode) {
- T(YAFFS_TRACE_OS,
- (TSTR("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_set_super_dirty(dev);
- /* return dentry; */
- return NULL;
-#endif
- }
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write: %d(%x) bytes written",
+ (unsigned)n, (unsigned)n);
- } else {
- T(YAFFS_TRACE_OS,(TSTR("yaffs_lookup not found\n")));
+ if (n_written > 0) {
+ ipos += n_written;
+ *pos = ipos;
+ if (ipos > inode->i_size) {
+ inode->i_size = ipos;
+ inode->i_blocks = (ipos + 511) >> 9;
+
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write size updated to %lld bytes, %d blocks",
+ ipos, (int)(inode->i_blocks));
+ }
}
+ yaffs_gross_unlock(dev);
+ return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
+}
-/* added NCB for 2.5/6 compatability - forces add even if inode is
- * NULL which creates dentry hash */
- d_add(dentry, inode);
-
- return NULL;
-}
-
-
-#ifdef YAFFS_HAS_PUT_INODE
-
-/* 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,
- (TSTR("yaffs_put_inode: ino %d, count %d\n"), (int)inode->i_ino,
- atomic_read(&inode->i_count)));
-
-}
-#endif
-
-
-static void yaffs_unstitch_obj(struct inode *inode, yaffs_obj_t *obj)
-{
- /* Clear the association between the inode and
- * the yaffs_obj_t.
- */
- obj->my_inode = NULL;
- yaffs_inode_to_obj_lv(inode) = NULL;
-
- /* If the object freeing was deferred, then the real
- * free happens now.
- * This should fix the inode inconsistency problem.
- */
- yaffs_handle_defered_free(obj);
-}
-#ifdef YAFFS_HAS_EVICT_INODE
-/* yaffs_evict_inode combines into one operation what was previously done in
- * yaffs_clear_inode() and yaffs_delete_inode()
- *
- */
-static void yaffs_evict_inode( struct inode *inode)
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *pg, void *fsdadata)
{
- yaffs_obj_t *obj;
- yaffs_dev_t *dev;
- int deleteme = 0;
+ int ret = 0;
+ void *addr, *kva;
+ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
- obj = yaffs_inode_to_obj(inode);
+ kva = kmap(pg);
+ addr = kva + offset_into_page;
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_evict_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
- atomic_read(&inode->i_count),
- obj ? "object exists" : "null object"));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_write_end addr %p pos %lld n_bytes %d",
+ addr, pos, copied);
- if (!inode->i_nlink && !is_bad_inode(inode))
- deleteme = 1;
- truncate_inode_pages(&inode->i_data,0);
- end_writeback(inode);
+ ret = yaffs_file_write(filp, addr, copied, &pos);
- if(deleteme && obj){
- dev = obj->my_dev;
- yaffs_gross_lock(dev);
- yaffs_del_obj(obj);
- yaffs_gross_unlock(dev);
- }
- if (obj) {
- dev = obj->my_dev;
- yaffs_gross_lock(dev);
- yaffs_unstitch_obj(inode,obj);
- yaffs_gross_unlock(dev);
+ if (ret != copied) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_write_end not same size ret %d copied %d",
+ ret, copied);
+ SetPageError(pg);
}
+ kunmap(pg);
+ yaffs_release_space(filp);
+ unlock_page(pg);
+ page_cache_release(pg);
+ return ret;
}
#else
-/* clear is called to tell the fs to release any per-inode data it holds.
- * The object might still exist on disk and is just being thrown out of the cache
- * or else the object has actually been deleted and we're being called via
- * the chain
- * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
- */
-
-static void yaffs_clear_inode(struct inode *inode)
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+ unsigned to)
{
- yaffs_obj_t *obj;
- yaffs_dev_t *dev;
+ void *addr, *kva;
- obj = yaffs_inode_to_obj(inode);
+ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
+ int n_bytes = to - offset;
+ int n_written;
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_clear_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
- atomic_read(&inode->i_count),
- obj ? "object exists" : "null object"));
+ kva = kmap(pg);
+ addr = kva + offset;
- if (obj) {
- dev = obj->my_dev;
- yaffs_gross_lock(dev);
- yaffs_unstitch_obj(inode,obj);
- yaffs_gross_unlock(dev);
- }
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_commit_write addr %p pos %lld n_bytes %d",
+ addr, pos, n_bytes);
-}
+ n_written = yaffs_file_write(f, addr, n_bytes, &pos);
-/* 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_obj_t *obj = yaffs_inode_to_obj(inode);
- yaffs_dev_t *dev;
+ if (n_written != n_bytes) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_commit_write not same size n_written %d n_bytes %d",
+ n_written, n_bytes);
+ SetPageError(pg);
+ }
+ kunmap(pg);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_delete_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
- atomic_read(&inode->i_count),
- obj ? "object exists" : "null object"));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_commit_write returning %d",
+ n_written == n_bytes ? 0 : n_written);
- if (obj) {
- dev = obj->my_dev;
- yaffs_gross_lock(dev);
- yaffs_del_obj(obj);
- yaffs_gross_unlock(dev);
- }
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
- truncate_inode_pages(&inode->i_data, 0);
-#endif
- clear_inode(inode);
+ return n_written == n_bytes ? 0 : n_written;
}
#endif
+static struct address_space_operations yaffs_file_address_operations = {
+ .readpage = yaffs_readpage,
+ .writepage = yaffs_writepage,
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+ .write_begin = yaffs_write_begin,
+ .write_end = yaffs_write_end,
+#else
+ .prepare_write = yaffs_prepare_write,
+ .commit_write = yaffs_commit_write,
+#endif
+};
+
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
static int yaffs_file_flush(struct file *file, fl_owner_t id)
static int yaffs_file_flush(struct file *file)
#endif
{
- yaffs_obj_t *obj = yaffs_dentry_to_obj(file->f_dentry);
+ struct yaffs_obj *obj = yaffs_dentry_to_obj(Y_GET_DENTRY(file));
- yaffs_dev_t *dev = obj->my_dev;
+ struct yaffs_dev *dev = obj->my_dev;
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_file_flush object %d (%s)\n"), obj->obj_id,
- obj->dirty ? "dirty" : "clean"));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_flush object %d (%s)",
+ obj->obj_id,
+ obj->dirty ? "dirty" : "clean");
yaffs_gross_lock(dev);
- yaffs_flush_file(obj, 1, 0);
+ yaffs_flush_file(obj, 1, 0, 0);
yaffs_gross_unlock(dev);
return 0;
}
-static int yaffs_readpage_nolock(struct file *f, struct page *pg)
-{
- /* Lifted from jffs2 */
- yaffs_obj_t *obj;
- unsigned char *pg_buf;
- int ret;
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync)
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+static int yaffs_sync_object(struct file *file, int datasync)
+#else
+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+ int datasync)
+#endif
+{
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+ struct dentry *dentry = file->f_path.dentry;
+#endif
- yaffs_dev_t *dev;
+ obj = yaffs_dentry_to_obj(dentry);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readpage_nolock at %08x, size %08x\n"),
- (unsigned)(pg->index << PAGE_CACHE_SHIFT),
- (unsigned)PAGE_CACHE_SIZE));
+ dev = obj->my_dev;
- obj = yaffs_dentry_to_obj(f->f_dentry);
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
+ "yaffs_sync_object");
+ yaffs_gross_lock(dev);
+ yaffs_flush_file(obj, 1, datasync, 0);
+ yaffs_gross_unlock(dev);
+ return 0;
+}
- dev = obj->my_dev;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- BUG_ON(!PageLocked(pg));
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
+static const struct file_operations yaffs_file_operations = {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0)
+ .read = new_sync_read,
+ .write = new_sync_write,
+#endif
+ .read_iter = generic_file_read_iter,
+ .write_iter = generic_file_write_iter,
#else
- if (!PageLocked(pg))
- PAGE_BUG(pg);
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
#endif
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+ .splice_read = generic_file_splice_read,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 0)
+ .splice_write = iter_file_splice_write,
+#else
+ .splice_write = generic_file_splice_write,
+#endif
+ .llseek = generic_file_llseek,
+};
- pg_buf = kmap(pg);
- /* FIXME: Can kmap fail? */
-
- yaffs_gross_lock(dev);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
- ret = yaffs_file_rd(obj, pg_buf,
- pg->index << PAGE_CACHE_SHIFT,
- PAGE_CACHE_SIZE);
+static const struct file_operations yaffs_file_operations = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+ .sendfile = generic_file_sendfile,
+};
- yaffs_gross_unlock(dev);
+#else
- if (ret >= 0)
- ret = 0;
+static const 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,
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ .sendfile = generic_file_sendfile,
+#endif
+};
+#endif
- if (ret) {
- ClearPageUptodate(pg);
- SetPageError(pg);
- } else {
- SetPageUptodate(pg);
- ClearPageError(pg);
- }
- flush_dcache_page(pg);
- kunmap(pg);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage_nolock done\n")));
- return ret;
-}
-static int yaffs_readpage_unlock(struct file *f, struct page *pg)
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
+static void zero_user_segment(struct page *page, unsigned start, unsigned end)
{
- int ret = yaffs_readpage_nolock(f, pg);
- UnlockPage(pg);
- return ret;
+ void *kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + start, 0, end - start);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
}
+#endif
-static int yaffs_readpage(struct file *f, struct page *pg)
+
+static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
{
- int ret;
+#ifdef YAFFS_USE_TRUNCATE_SETSIZE
+ truncate_setsize(inode, newsize);
+ return 0;
+#else
+ truncate_inode_pages(&inode->i_data, newsize);
+ return 0;
+#endif
- T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage\n")));
- ret=yaffs_readpage_unlock(f, pg);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage done\n")));
- return ret;
}
-/* 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)
+static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
+{
+#ifdef YAFFS_USE_SETATTR_COPY
+ setattr_copy(inode, attr);
+ return 0;
#else
-static int yaffs_writepage(struct page *page)
+ return inode_setattr(inode, attr);
#endif
-{
- yaffs_dev_t *dev;
- struct address_space *mapping = page->mapping;
- struct inode *inode;
- unsigned long end_index;
- char *buffer;
- yaffs_obj_t *obj;
- int n_written = 0;
- unsigned n_bytes;
- loff_t i_size;
- if (!mapping)
- BUG();
- inode = mapping->host;
- if (!inode)
- BUG();
- i_size = i_size_read(inode);
+}
- end_index = i_size >> PAGE_CACHE_SHIFT;
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ struct yaffs_dev *dev;
- if(page->index < end_index)
- n_bytes = PAGE_CACHE_SIZE;
- else {
- n_bytes = i_size & (PAGE_CACHE_SIZE -1);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_setattr of object %d",
+ yaffs_inode_to_obj(inode)->obj_id);
+#if 0
+ /* Fail if a requested resize >= 2GB */
+ if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
+ error = -EINVAL;
+#endif
- if (page->index > end_index || !n_bytes) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_writepage at %08x, inode size = %08x!!!\n"),
- (unsigned)(page->index << PAGE_CACHE_SHIFT),
- (unsigned)inode->i_size));
- T(YAFFS_TRACE_OS,
- (TSTR(" -> don't care!!\n")));
-
- zero_user_segment(page,0,PAGE_CACHE_SIZE);
- set_page_writeback(page);
- unlock_page(page);
- end_page_writeback(page);
- return 0;
+ if (error == 0)
+ error = setattr_prepare(dentry, attr);
+ if (error == 0) {
+ int result;
+ if (!error) {
+ error = yaffs_vfs_setattr(inode, attr);
+ yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
+ if (attr->ia_valid & ATTR_SIZE) {
+ yaffs_vfs_setsize(inode, attr->ia_size);
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+ }
}
- }
-
- if(n_bytes != PAGE_CACHE_SIZE)
- zero_user_segment(page,n_bytes,PAGE_CACHE_SIZE);
-
- get_page(page);
-
- buffer = kmap(page);
+ dev = yaffs_inode_to_obj(inode)->my_dev;
+ if (attr->ia_valid & ATTR_SIZE) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "resize to %d(%x)",
+ (int)(attr->ia_size),
+ (int)(attr->ia_size));
+ }
+ yaffs_gross_lock(dev);
+ result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
+ if (result == YAFFS_OK) {
+ error = 0;
+ } else {
+ error = -EPERM;
+ }
+ yaffs_gross_unlock(dev);
- obj = yaffs_inode_to_obj(inode);
- dev = obj->my_dev;
- yaffs_gross_lock(dev);
+ }
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_writepage at %08x, size %08x\n"),
- (unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes));
- T(YAFFS_TRACE_OS,
- (TSTR("writepag0: obj = %05x, ino = %05x\n"),
- (int)obj->variant.file_variant.file_size, (int)inode->i_size));
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
- n_written = yaffs_wr_file(obj, buffer,
- page->index << PAGE_CACHE_SHIFT, n_bytes, 0);
+ return error;
+}
- yaffs_touch_super(dev);
+#ifdef YAFFS_USE_XATTR
+#if (YAFFS_NEW_XATTR > 0)
+static int yaffs_setxattr(struct dentry *dentry, struct inode *inode,
+ const char *name, const void *value, size_t size, int flags)
+{
+#else
+static int yaffs_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ struct inode *inode = dentry->d_inode;
+#endif
+ int error = 0;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- T(YAFFS_TRACE_OS,
- (TSTR("writepag1: obj = %05x, ino = %05x\n"),
- (int)obj->variant.file_variant.file_size, (int)inode->i_size));
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
- yaffs_gross_unlock(dev);
+ if (error == 0) {
+ int result;
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
+ result = yaffs_set_xattrib(obj, name, value, size, flags);
+ if (result == YAFFS_OK)
+ error = 0;
+ else if (result < 0)
+ error = result;
+ yaffs_gross_unlock(dev);
- kunmap(page);
- set_page_writeback(page);
- unlock_page(page);
- end_page_writeback(page);
- put_page(page);
+ }
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
- return (n_written == n_bytes) ? 0 : -ENOSPC;
+ return error;
}
-
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
+#if (YAFFS_NEW_XATTR > 0)
+static ssize_t yaffs_getxattr(struct dentry * dentry, struct inode *inode,
+ const char *name, void *buff, size_t size)
{
- struct page *pg = NULL;
- pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-
- int ret = 0;
- int space_held = 0;
-
- /* Get a page */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
- pg = grab_cache_page_write_begin(mapping, index, flags);
#else
- pg = __grab_cache_page(mapping, index);
+static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name,
+ void *buff, size_t size)
+{
+ struct inode *inode = dentry->d_inode;
#endif
+ int error = 0;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- *pagep = pg;
- if (!pg) {
- ret = -ENOMEM;
- goto out;
- }
- T(YAFFS_TRACE_OS,
- (TSTR("start yaffs_write_begin index %d(%x) uptodate %d\n"),
- (int)index,(int)index,Page_Uptodate(pg) ? 1 : 0));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_getxattr \"%s\" from object %d",
+ name, obj->obj_id);
- /* Get fs space */
- space_held = yaffs_hold_space(filp);
+ if (error == 0) {
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
+ error = yaffs_get_xattrib(obj, name, buff, size);
+ yaffs_gross_unlock(dev);
- if (!space_held) {
- ret = -ENOSPC;
- goto out;
}
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
- /* Update page if required */
-
- if (!Page_Uptodate(pg))
- ret = yaffs_readpage_nolock(filp, pg);
+ return error;
+}
- if (ret)
- goto out;
+static int yaffs_removexattr(struct dentry *dentry, const char *name)
+{
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- /* Happy path return */
- T(YAFFS_TRACE_OS, (TSTR("end yaffs_write_begin - ok\n")));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_removexattr of object %d", obj->obj_id);
- return 0;
+ if (error == 0) {
+ int result;
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
+ result = yaffs_remove_xattrib(obj, name);
+ if (result == YAFFS_OK)
+ error = 0;
+ else if (result < 0)
+ error = result;
+ yaffs_gross_unlock(dev);
-out:
- T(YAFFS_TRACE_OS,
- (TSTR("end yaffs_write_begin fail returning %d\n"), ret));
- if (space_held)
- yaffs_release_space(filp);
- if (pg) {
- unlock_page(pg);
- page_cache_release(pg);
}
- return ret;
-}
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_removexattr done returning %d", error);
-#else
+ return error;
+}
+#endif
-static int yaffs_prepare_write(struct file *f, struct page *pg,
- unsigned offset, unsigned to)
+static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
{
- T(YAFFS_TRACE_OS, (TSTR("yaffs_prepair_write\n")));
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- if (!Page_Uptodate(pg))
- return yaffs_readpage_nolock(f, pg);
- return 0;
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_listxattr of object %d", obj->obj_id);
+
+ if (error == 0) {
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
+ error = yaffs_list_xattrib(obj, buff, size);
+ yaffs_gross_unlock(dev);
+
+ }
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_listxattr done returning %d", error);
+
+ return error;
}
+
+
+static const struct inode_operations yaffs_file_inode_operations = {
+ .setattr = yaffs_setattr,
+#ifdef YAFFS_USE_XATTR
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .removexattr = yaffs_removexattr,
#endif
+ .listxattr = yaffs_listxattr,
+};
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata)
+
+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
+ int buflen)
{
- int ret = 0;
- void *addr, *kva;
- uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
+ unsigned char *alias;
+ int ret;
- kva = kmap(pg);
- addr = kva + offset_into_page;
+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
- T(YAFFS_TRACE_OS,
- ("yaffs_write_end addr %p pos %x n_bytes %d\n",
- addr,(unsigned)pos, copied));
+ yaffs_gross_lock(dev);
- ret = yaffs_file_write(filp, addr, copied, &pos);
+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
- if (ret != copied) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_write_end not same size ret %d copied %d\n"),
- ret, copied));
- SetPageError(pg);
- } else {
- /* Nothing */
- }
+ yaffs_gross_unlock(dev);
- kunmap(pg);
+ if (!alias)
+ return -ENOMEM;
- yaffs_release_space(filp);
- unlock_page(pg);
- page_cache_release(pg);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0)
+ ret = vfs_readlink(dentry, buffer, buflen, alias);
+#else
+ ret = readlink_copy(buffer, buflen, alias);
+#endif
+ kfree(alias);
return ret;
}
-#else
-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
- unsigned to)
+#if (YAFFS_NEW_GET_LINK == 0)
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
{
- void *addr, *kva;
+ void *ret;
+#else
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ int ret
+#endif
+ unsigned char *alias;
+ int ret_int = 0;
+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
- loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
- int n_bytes = to - offset;
- int n_written;
+ yaffs_gross_lock(dev);
- unsigned spos = pos;
- unsigned saddr;
+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
+ yaffs_gross_unlock(dev);
- kva = kmap(pg);
- addr = kva + offset;
+ if (!alias) {
+ ret_int = -ENOMEM;
+ goto out;
+ }
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+ nd_set_link(nd, alias);
+ ret = alias;
+out:
+ if (ret_int)
+ ret = ERR_PTR(ret_int);
+ return ret;
+#else
+ ret = vfs_follow_link(nd, alias);
+ kfree(alias);
+out:
+ if (ret_int)
+ ret = ret_int;
+ return ret;
+#endif
+}
+#else
+static const char *yaffs_get_link(struct dentry *dentry, struct inode *inode, struct delayed_call *done)
+{
+ unsigned char *alias;
+ struct yaffs_dev *dev;
- saddr = (unsigned) addr;
+ if (!dentry)
+ return ERR_PTR(-ECHILD);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_commit_write addr %x pos %x n_bytes %d\n"),
- saddr, spos, n_bytes));
+ dev = yaffs_dentry_to_obj(dentry)->my_dev;
- n_written = yaffs_file_write(f, addr, n_bytes, &pos);
+ yaffs_gross_lock(dev);
- if (n_written != n_bytes) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_commit_write not same size n_written %d n_bytes %d\n"),
- n_written, n_bytes));
- SetPageError(pg);
- } else {
- /* Nothing */
- }
+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
+ yaffs_gross_unlock(dev);
- kunmap(pg);
+ if (!alias)
+ return ERR_PTR(-ENOMEM);
+ set_delayed_call(done, kfree_link, alias);
+ return alias;
+}
+#endif
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_commit_write returning %d\n"),
- n_written == n_bytes ? 0 : n_written));
+#ifdef YAFFS_HAS_PUT_INODE
- return n_written == n_bytes ? 0 : n_written;
+/* 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)
+{
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_put_inode: ino %d, count %d"),
+ (int)inode->i_ino, atomic_read(&inode->i_count);
+
+}
+#endif
+
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
+{
+ kfree(alias);
}
#endif
+static const struct inode_operations yaffs_symlink_inode_operations = {
+ .readlink = yaffs_readlink,
+#if (YAFFS_NEW_GET_LINK == 1)
+ .get_link = yaffs_get_link,
+#else
+ .follow_link = yaffs_follow_link,
+#endif
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+ .put_link = yaffs_put_link,
+#endif
+ .setattr = yaffs_setattr,
+#ifdef YAFFS_USE_XATTR
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .removexattr = yaffs_removexattr,
+#endif
+ .listxattr = yaffs_listxattr,
+};
+
+#ifdef YAFFS_USE_OWN_IGET
-static void yaffs_fill_inode_from_obj(struct inode *inode, yaffs_obj_t *obj)
+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
{
- if (inode && obj) {
+ struct inode *inode;
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
- /* Check mode against the variant type and attempt to repair if broken. */
- __u32 mode = obj->yst_mode;
- switch (obj->variant_type) {
- case YAFFS_OBJECT_TYPE_FILE:
- if (!S_ISREG(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFREG;
- }
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (!S_ISLNK(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFLNK;
- }
+ /* NB This is called as a side effect of other functions, but
+ * we had to release the lock to prevent deadlocks, so
+ * need to lock again.
+ */
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- if (!S_ISDIR(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFDIR;
- }
+ yaffs_gross_lock(dev);
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- default:
- /* TODO? */
- break;
- }
+ obj = yaffs_find_by_number(dev, inode->i_ino);
- inode->i_flags |= S_NOATIME;
+ yaffs_fill_inode_from_obj(inode, obj);
- inode->i_ino = obj->obj_id;
- inode->i_mode = obj->yst_mode;
- inode->i_uid = obj->yst_uid;
- inode->i_gid = obj->yst_gid;
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
- inode->i_blksize = inode->i_sb->s_blocksize;
-#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ yaffs_gross_unlock(dev);
+
+ unlock_new_inode(inode);
+ return inode;
+}
- 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_get_obj_length(obj);
- inode->i_blocks = (inode->i_size + 511) >> 9;
- inode->i_nlink = yaffs_get_obj_link_count(obj);
+static void yaffs_read_inode(struct inode *inode)
+{
+ /* NB This is called as a side effect of other functions, but
+ * we had to release the lock to prevent deadlocks, so
+ * need to lock again.
+ */
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_fill_inode 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)));
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev = yaffs_super_to_dev(inode->i_sb);
- 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;
- }
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_read_inode for %d", (int)inode->i_ino);
- yaffs_inode_to_obj_lv(inode) = obj;
+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
+ yaffs_gross_lock(dev);
- obj->my_inode = inode;
+ obj = yaffs_find_by_number(dev, inode->i_ino);
- } else {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_fill_inode invalid parameters\n")));
- }
+ yaffs_fill_inode_from_obj(inode, obj);
+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
+ yaffs_gross_unlock(dev);
}
+#endif
+
+
+
struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
- yaffs_obj_t *obj)
+ struct yaffs_obj *obj)
{
struct inode *inode;
if (!sb) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_get_inode for NULL super_block!!\n")));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_get_inode for NULL super_block!!");
return NULL;
}
if (!obj) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_get_inode for NULL object!!\n")));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_get_inode for NULL object!!");
return NULL;
}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_get_inode for object %d\n"), obj->obj_id));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_get_inode for object %d", obj->obj_id);
inode = Y_IGET(sb, obj->obj_id);
if (IS_ERR(inode))
return inode;
}
-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
- loff_t *pos)
+
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+#define YCRED(x) x
+#else
+#define YCRED(x) (x->cred)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0)
+#define YPROC_uid(p) (YCRED(p)->fsuid)
+#define YPROC_gid(p) (YCRED(p)->fsgid)
+#define EXTRACT_gid(x) x
+#define EXTRACT_uid(x) x
+#define MAKE_gid(x) x
+#define MAKE_uid(x) x
+#else
+#define YPROC_uid(p) from_kuid(&init_user_ns, YCRED(p)->fsuid)
+#define YPROC_gid(p) from_kgid(&init_user_ns, YCRED(p)->fsgid)
+#define EXTRACT_gid(x) from_kgid(&init_user_ns, x)
+#define EXTRACT_uid(x) from_kuid(&init_user_ns, x)
+#define MAKE_gid(x) make_kgid(&init_user_ns, x)
+#define MAKE_uid(x) make_kuid(&init_user_ns, x)
+#endif
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
+ dev_t rdev)
+#elif (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
{
- yaffs_obj_t *obj;
- int n_written, ipos;
struct inode *inode;
- yaffs_dev_t *dev;
- obj = yaffs_dentry_to_obj(f->f_dentry);
+ struct yaffs_obj *obj = NULL;
+ struct yaffs_dev *dev;
- dev = obj->my_dev;
+ struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
+
+ int error = -ENOSPC;
+ uid_t uid = YPROC_uid(current);
+ gid_t gid =
+ (dir->i_mode & S_ISGID) ? EXTRACT_gid(dir->i_gid) : YPROC_gid(current);
+
+ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+ mode |= S_ISGID;
+
+ if (parent) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_mknod: parent object %d type %d",
+ parent->obj_id, parent->variant_type);
+ } else {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_mknod: could not get parent object");
+ return -EPERM;
+ }
+
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_mknod: making oject for %s, mode %x dev %x",
+ dentry->d_name.name, mode, rdev);
+
+ dev = parent->my_dev;
yaffs_gross_lock(dev);
- inode = f->f_dentry->d_inode;
+ switch (mode & S_IFMT) {
+ default:
+ /* Special (socket, fifo, device...) */
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special");
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ obj =
+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
+ gid, old_encode_dev(rdev));
+#else
+ obj =
+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
+ gid, rdev);
+#endif
+ break;
+ case S_IFREG: /* file */
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file");
+ obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
+ gid);
+ break;
+ case S_IFDIR: /* directory */
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory");
+ obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
+ uid, gid);
+ break;
+ case S_IFLNK: /* symlink */
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink");
+ obj = NULL; /* Do we ever get here? */
+ break;
+ }
- if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
- ipos = inode->i_size;
- else
- ipos = *pos;
+ /* Can not call yaffs_get_inode() with gross lock held */
+ yaffs_gross_unlock(dev);
- if (!obj)
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_file_write: hey obj is null!\n")));
- else
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_file_write about to write writing %u(%x) bytes"
- "to object %d at %d(%x)\n"),
- (unsigned) n, (unsigned) n, obj->obj_id, ipos,ipos));
+ if (obj) {
+ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
+ d_instantiate(dentry, inode);
+ update_dir_time(dir);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_mknod created object %d count = %d",
+ obj->obj_id, atomic_read(&inode->i_count));
+ error = 0;
+ yaffs_fill_inode_from_obj(dir, parent);
+ } else {
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object");
+ error = -ENOMEM;
+ }
- n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
+ return error;
+}
- yaffs_touch_super(dev);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+#else
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+#endif
+{
+ int ret_val;
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mkdir");
+ ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
+ return ret_val;
+}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_file_write: %d(%x) bytes written\n"),
- (unsigned )n,(unsigned)n));
- if (n_written > 0) {
- ipos += n_written;
- *pos = ipos;
- if (ipos > inode->i_size) {
- inode->i_size = ipos;
- inode->i_blocks = (ipos + 511) >> 9;
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool dummy)
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ struct nameidata *n)
+#elif (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
+{
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_create");
+ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_file_write size updated to %d bytes, "
- "%d blocks\n"),
- ipos, (int)(inode->i_blocks)));
- }
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int dummy)
+#elif (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
+{
+ struct yaffs_obj *obj;
+ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
+ struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
+
+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
+ yaffs_gross_lock(dev);
+
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup for %d:%s",
+ yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name);
+
+ obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
+
+ obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
+
+ /* Can't hold gross lock when calling yaffs_get_inode() */
+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
+ yaffs_gross_unlock(dev);
+
+ if (obj) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_lookup found %d", obj->obj_id);
+
+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+ } else {
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
+
+ }
+
+/* added NCB for 2.5/6 compatability - forces add even if inode is
+ * NULL which creates dentry hash */
+ d_add(dentry, inode);
+
+ return NULL;
+}
+
+/*
+ * Create a link...
+ */
+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
+{
+ struct inode *inode = old_dentry->d_inode;
+ struct yaffs_obj *obj = NULL;
+ struct yaffs_obj *link = NULL;
+ struct yaffs_dev *dev;
+
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_link");
+
+ obj = yaffs_inode_to_obj(inode);
+ dev = obj->my_dev;
+
+ yaffs_gross_lock(dev);
+
+ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
+ link =
+ yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
+ obj);
+
+ if (link) {
+ set_nlink(old_dentry->d_inode, yaffs_get_obj_link_count(obj));
+ d_instantiate(dentry, old_dentry->d_inode);
+ atomic_inc(&old_dentry->d_inode->i_count);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_link link count %d i_count %d",
+ old_dentry->d_inode->i_nlink,
+ atomic_read(&old_dentry->d_inode->i_count));
}
+
yaffs_gross_unlock(dev);
- return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
+
+ if (link) {
+ update_dir_time(dir);
+ return 0;
+ }
+
+ return -EPERM;
}
-/* Space holding and freeing is done to ensure we have space available for write_begin/end */
-/* For now we just assume few parallel writes and check against a small number. */
-/* Todo: need to do this with a counter to handle parallel reads better */
+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *symname)
+{
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
+ uid_t uid = YPROC_uid(current);
+ gid_t gid =
+ (dir->i_mode & S_ISGID) ? EXTRACT_gid(dir->i_gid) : YPROC_gid(current);
-static ssize_t yaffs_hold_space(struct file *f)
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
+
+ if (strnlen(dentry->d_name.name, YAFFS_MAX_NAME_LENGTH + 1) >
+ YAFFS_MAX_NAME_LENGTH)
+ return -ENAMETOOLONG;
+
+ if (strnlen(symname, YAFFS_MAX_ALIAS_LENGTH + 1) >
+ YAFFS_MAX_ALIAS_LENGTH)
+ return -ENAMETOOLONG;
+
+ dev = yaffs_inode_to_obj(dir)->my_dev;
+ yaffs_gross_lock(dev);
+ obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
+ S_IFLNK | S_IRWXUGO, uid, gid, symname);
+ yaffs_gross_unlock(dev);
+
+ if (obj) {
+ struct inode *inode;
+
+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+ d_instantiate(dentry, inode);
+ update_dir_time(dir);
+ yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
+ return 0;
+ } else {
+ yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
+ }
+
+ return -ENOMEM;
+}
+
+/*
+ * 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
+ */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0))
+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry, unsigned int unused)
+#else
+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+#endif
{
- yaffs_obj_t *obj;
- yaffs_dev_t *dev;
+ struct yaffs_dev *dev;
+ int ret_val = YAFFS_FAIL;
+ struct yaffs_obj *target;
- int n_free_chunks;
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
+ dev = yaffs_inode_to_obj(old_dir)->my_dev;
+
+ yaffs_gross_lock(dev);
+
+ /* Check if the target is an existing directory that is not empty. */
+ target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
+ new_dentry->d_name.name);
+
+ if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ !list_empty(&target->variant.dir_variant.children)) {
+
+ yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
+
+ ret_val = YAFFS_FAIL;
+ } else {
+ /* Now does unlinking internally using shadowing mechanism */
+ yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
+ ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
+ old_dentry->d_name.name,
+ yaffs_inode_to_obj(new_dir),
+ new_dentry->d_name.name);
+ }
+ yaffs_gross_unlock(dev);
+
+ if (ret_val == YAFFS_OK) {
+ if (target)
+ inode_dec_link_count(new_dentry->d_inode);
+
+ update_dir_time(old_dir);
+ if (old_dir != new_dir)
+ update_dir_time(new_dir);
+ return 0;
+ } else {
+ return -ENOTEMPTY;
+ }
+}
+
+
+
+
+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ int ret_val;
- obj = yaffs_dentry_to_obj(f->f_dentry);
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj;
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_unlink %d:%s",
+ (int)(dir->i_ino), dentry->d_name.name);
+ obj = yaffs_inode_to_obj(dir);
dev = obj->my_dev;
yaffs_gross_lock(dev);
- n_free_chunks = yaffs_get_n_free_chunks(dev);
+ ret_val = yaffs_unlinker(obj, dentry->d_name.name);
+ if (ret_val == YAFFS_OK) {
+ inode_dec_link_count(dentry->d_inode);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0))
+ inode_inc_iversion(dir);
+#else
+ dir->i_version++;
+#endif
+ yaffs_gross_unlock(dev);
+ update_dir_time(dir);
+ return 0;
+ }
yaffs_gross_unlock(dev);
+ return -ENOTEMPTY;
+}
- return (n_free_chunks > 20) ? 1 : 0;
+
+
+static const 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,
+ .listxattr = yaffs_listxattr,
+#ifdef YAFFS_USE_XATTR
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .removexattr = yaffs_removexattr,
+#endif
+};
+
+/*-----------------------------------------------------------------*/
+/* Directory search context allows us to unlock access to yaffs during
+ * filldir without causing problems with the directory being modified.
+ * This is similar to the tried and tested mechanism used in yaffs direct.
+ *
+ * A search context iterates along a doubly linked list of siblings in the
+ * directory. If the iterating object is deleted then this would corrupt
+ * the list iteration, likely causing a crash. The search context avoids
+ * this by using the remove_obj_fn to move the search context to the
+ * next object before the object is deleted.
+ *
+ * Many readdirs (and thus seach conexts) may be alive simulateously so
+ * each struct yaffs_dev has a list of these.
+ *
+ * A seach context lives for the duration of a readdir.
+ *
+ * All these functions must be called while yaffs is locked.
+ */
+
+struct yaffs_search_context {
+ struct yaffs_dev *dev;
+ struct yaffs_obj *dir_obj;
+ struct yaffs_obj *next_return;
+ struct list_head others;
+};
+
+/*
+ * yaffs_new_search() creates a new search context, initialises it and
+ * adds it to the device's search context list.
+ *
+ * Called at start of readdir.
+ */
+static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir)
+{
+ struct yaffs_dev *dev = dir->my_dev;
+ struct yaffs_search_context *sc =
+ kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
+ if (sc) {
+ sc->dir_obj = dir;
+ sc->dev = dev;
+ if (list_empty(&sc->dir_obj->variant.dir_variant.children))
+ sc->next_return = NULL;
+ else
+ sc->next_return =
+ list_entry(dir->variant.dir_variant.children.next,
+ struct yaffs_obj, siblings);
+ INIT_LIST_HEAD(&sc->others);
+ list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
+ }
+ return sc;
+}
+
+/*
+ * yaffs_search_end() disposes of a search context and cleans up.
+ */
+static void yaffs_search_end(struct yaffs_search_context *sc)
+{
+ if (sc) {
+ list_del(&sc->others);
+ kfree(sc);
+ }
+}
+
+/*
+ * yaffs_search_advance() moves a search context to the next object.
+ * Called when the search iterates or when an object removal causes
+ * the search context to be moved to the next object.
+ */
+static void yaffs_search_advance(struct yaffs_search_context *sc)
+{
+ if (!sc)
+ return;
+
+ if (sc->next_return == NULL ||
+ list_empty(&sc->dir_obj->variant.dir_variant.children))
+ sc->next_return = NULL;
+ else {
+ struct list_head *next = sc->next_return->siblings.next;
+
+ if (next == &sc->dir_obj->variant.dir_variant.children)
+ sc->next_return = NULL; /* end of list */
+ else
+ sc->next_return =
+ list_entry(next, struct yaffs_obj, siblings);
+ }
}
-static void yaffs_release_space(struct file *f)
+/*
+ * yaffs_remove_obj_callback() is called when an object is unlinked.
+ * We check open search contexts and advance any which are currently
+ * on the object being iterated.
+ */
+static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
+{
+
+ struct list_head *i;
+ struct yaffs_search_context *sc;
+ struct list_head *search_contexts =
+ &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
+
+ /* Iterate through the directory search contexts.
+ * If any are currently on the object being removed, then advance
+ * the search context to the next object to prevent a hanging pointer.
+ */
+ list_for_each(i, search_contexts) {
+ sc = list_entry(i, struct yaffs_search_context, others);
+ if (sc->next_return == obj)
+ yaffs_search_advance(sc);
+ }
+
+}
+
+
+/*-----------------------------------------------------------------*/
+
+#ifdef YAFFS_USE_DIR_ITERATE
+static int yaffs_iterate(struct file *f, struct dir_context *dc)
{
- yaffs_obj_t *obj;
- yaffs_dev_t *dev;
-
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
+ struct yaffs_search_context *sc;
+ unsigned long curoffs;
+ struct yaffs_obj *l;
+ int ret_val = 0;
- obj = yaffs_dentry_to_obj(f->f_dentry);
+ char name[YAFFS_MAX_NAME_LENGTH + 1];
+ obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
dev = obj->my_dev;
yaffs_gross_lock(dev);
+ yaffs_dev_to_lc(dev)->readdir_process = current;
- yaffs_gross_unlock(dev);
-}
+ sc = yaffs_new_search(obj);
+ if (!sc) {
+ ret_val = -ENOMEM;
+ goto out;
+ }
+ if (!dir_emit_dots(f, dc))
+ goto out;
-static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin)
-{
- long long retval;
+ curoffs = 1;
- lock_kernel();
+ while (sc->next_return) {
+ curoffs++;
+ l = sc->next_return;
+ if (curoffs >= dc->pos) {
+ int this_inode = yaffs_get_obj_inode(l);
+ int this_type = yaffs_get_obj_type(l);
+
+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readdir: %s inode %d",
+ name, yaffs_get_obj_inode(l));
+
+ yaffs_gross_unlock(dev);
+
+ if (!dir_emit(dc,
+ name,
+ strlen(name),
+ this_inode,
+ this_type)) {
+ yaffs_gross_lock(dev);
+ goto out;
+ }
- switch (origin){
- case 2:
- offset += i_size_read(file->f_path.dentry->d_inode);
- break;
- case 1:
- offset += file->f_pos;
+ yaffs_gross_lock(dev);
+
+ dc->pos++;
+ f->f_pos++;
+ }
+ yaffs_search_advance(sc);
}
- retval = -EINVAL;
- if (offset >= 0){
- if (offset != file->f_pos)
- file->f_pos = offset;
+out:
+ yaffs_search_end(sc);
+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
+ yaffs_gross_unlock(dev);
- retval = offset;
- }
- unlock_kernel();
- return retval;
+ return ret_val;
}
+#else
static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
{
- yaffs_obj_t *obj;
- yaffs_dev_t *dev;
- struct yaffs_search_context *sc;
- struct inode *inode = f->f_dentry->d_inode;
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
+ struct yaffs_search_context *sc;
+ struct inode *inode = Y_GET_DENTRY(f)->d_inode;
unsigned long offset, curoffs;
- yaffs_obj_t *l;
- int ret_val = 0;
+ struct yaffs_obj *l;
+ int ret_val = 0;
char name[YAFFS_MAX_NAME_LENGTH + 1];
- obj = yaffs_dentry_to_obj(f->f_dentry);
+ obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
dev = obj->my_dev;
yaffs_gross_lock(dev);
offset = f->f_pos;
- sc = yaffs_new_search(obj);
- if(!sc){
- ret_val = -ENOMEM;
- goto out;
- }
+ sc = yaffs_new_search(obj);
+ if (!sc) {
+ ret_val = -ENOMEM;
+ goto out;
+ }
- T(YAFFS_TRACE_OS, (TSTR("yaffs_readdir: starting at %d\n"), (int)offset));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readdir: starting at %d", (int)offset);
if (offset == 0) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readdir: entry . ino %d \n"),
- (int)inode->i_ino));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readdir: entry . ino %d",
+ (int)inode->i_ino);
yaffs_gross_unlock(dev);
- if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0){
+ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
yaffs_gross_lock(dev);
goto out;
}
f->f_pos++;
}
if (offset == 1) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readdir: entry .. ino %d \n"),
- (int)f->f_dentry->d_parent->d_inode->i_ino));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readdir: entry .. ino %d",
+ (int)f->f_dentry->d_parent->d_inode->i_ino);
yaffs_gross_unlock(dev);
if (filldir(dirent, "..", 2, offset,
- f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0){
+ f->f_dentry->d_parent->d_inode->i_ino,
+ DT_DIR) < 0) {
yaffs_gross_lock(dev);
goto out;
}
f->f_version = inode->i_version;
}
- while(sc->next_return){
+ while (sc->next_return) {
curoffs++;
- l = sc->next_return;
+ l = sc->next_return;
if (curoffs >= offset) {
- int this_inode = yaffs_get_obj_inode(l);
- int this_type = yaffs_get_obj_type(l);
+ int this_inode = yaffs_get_obj_inode(l);
+ int this_type = yaffs_get_obj_type(l);
- yaffs_get_obj_name(l, name,
- YAFFS_MAX_NAME_LENGTH + 1);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readdir: %s inode %d\n"),
- name, yaffs_get_obj_inode(l)));
+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readdir: %s inode %d",
+ name, yaffs_get_obj_inode(l));
- yaffs_gross_unlock(dev);
+ yaffs_gross_unlock(dev);
if (filldir(dirent,
- name,
- strlen(name),
- offset,
- this_inode,
- this_type) < 0){
+ name,
+ strlen(name),
+ offset, this_inode, this_type) < 0) {
yaffs_gross_lock(dev);
goto out;
}
- yaffs_gross_lock(dev);
+ yaffs_gross_lock(dev);
offset++;
f->f_pos++;
}
- yaffs_search_advance(sc);
+ yaffs_search_advance(sc);
}
out:
return ret_val;
}
-
-
-/*
- * File creation. Allocate an inode, and we're done..
- */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-#define YCRED(x) x
-#else
-#define YCRED(x) (x->cred)
#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t rdev)
+static const struct file_operations yaffs_dir_operations = {
+ .read = generic_read_dir,
+#ifdef YAFFS_USE_DIR_ITERATE
+ .iterate = yaffs_iterate,
#else
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- int rdev)
+ .readdir = yaffs_readdir,
#endif
+ .fsync = yaffs_sync_object,
+ .llseek = generic_file_llseek,
+};
+
+static void yaffs_fill_inode_from_obj(struct inode *inode,
+ struct yaffs_obj *obj)
{
- struct inode *inode;
+ if (inode && obj) {
+
+ /* Check mode against the variant type and attempt to repair if broken. */
+ u32 mode = obj->yst_mode;
+ switch (obj->variant_type) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ if (!S_ISREG(mode)) {
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFREG;
+ }
- yaffs_obj_t *obj = NULL;
- yaffs_dev_t *dev;
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ if (!S_ISLNK(mode)) {
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFLNK;
+ }
- yaffs_obj_t *parent = yaffs_inode_to_obj(dir);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ if (!S_ISDIR(mode)) {
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFDIR;
+ }
- int error = -ENOSPC;
- uid_t uid = YCRED(current)->fsuid;
- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ default:
+ /* TODO? */
+ break;
+ }
- if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
- mode |= S_ISGID;
+ inode->i_flags |= S_NOATIME;
- if (parent) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_mknod: parent object %d type %d\n"),
- parent->obj_id, parent->variant_type));
- } else {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_mknod: could not get parent object\n")));
- return -EPERM;
- }
+ inode->i_ino = obj->obj_id;
+ inode->i_mode = obj->yst_mode;
+ inode->i_uid = MAKE_uid(obj->yst_uid);
+ inode->i_gid = MAKE_gid(obj->yst_gid);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+ inode->i_blksize = inode->i_sb->s_blocksize;
+#endif
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making oject for %s, "
- "mode %x dev %x\n"),
- dentry->d_name.name, mode, rdev));
+ 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_get_obj_length(obj);
+ inode->i_blocks = (inode->i_size + 511) >> 9;
- dev = parent->my_dev;
+ set_nlink(inode, yaffs_get_obj_link_count(obj));
- yaffs_gross_lock(dev);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_fill_inode mode %x uid %d gid %d size %lld count %d",
+ inode->i_mode, obj->yst_uid, obj->yst_gid,
+ inode->i_size, atomic_read(&inode->i_count));
- switch (mode & S_IFMT) {
- default:
- /* Special (socket, fifo, device...) */
- T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making special\n")));
+ switch (obj->yst_mode & S_IFMT) {
+ default: /* fifo, device or socket */
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- obj = yaffs_create_special(parent, dentry->d_name.name, mode, uid,
- gid, old_encode_dev(rdev));
+ init_special_inode(inode, obj->yst_mode,
+ old_decode_dev(obj->yst_rdev));
#else
- obj = yaffs_create_special(parent, dentry->d_name.name, mode, uid,
- gid, rdev);
+ init_special_inode(inode, obj->yst_mode,
+ (dev_t) (obj->yst_rdev));
#endif
- break;
- case S_IFREG: /* file */
- T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making file\n")));
- obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
- gid);
- break;
- case S_IFDIR: /* directory */
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_mknod: making directory\n")));
- obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
- uid, gid);
- break;
- case S_IFLNK: /* symlink */
- T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making symlink\n")));
- obj = NULL; /* Do we ever get here? */
- break;
- }
+ 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;
+ }
- /* Can not call yaffs_get_inode() with gross lock held */
- yaffs_gross_unlock(dev);
+ yaffs_inode_to_obj_lv(inode) = obj;
+
+ obj->my_inode = inode;
- if (obj) {
- inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
- d_instantiate(dentry, inode);
- update_dir_time(dir);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_mknod created object %d count = %d\n"),
- obj->obj_id, atomic_read(&inode->i_count)));
- error = 0;
- yaffs_fill_inode_from_obj(dir,parent);
} else {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_mknod failed making object\n")));
- error = -ENOMEM;
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_fill_inode invalid parameters");
}
- return error;
}
-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+
+
+/*
+ * yaffs background thread functions .
+ * yaffs_bg_thread_fn() the thread function
+ * yaffs_bg_start() launches the background thread.
+ * yaffs_bg_stop() cleans up the background thread.
+ *
+ * NB:
+ * The thread should only run after the yaffs is initialised
+ * The thread should be stopped before yaffs is unmounted.
+ * The thread should not do any writing while the fs is in read only.
+ */
+
+static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev)
{
- int ret_val;
- T(YAFFS_TRACE_OS, (TSTR("yaffs_mkdir\n")));
- ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
- return ret_val;
+ unsigned erased_chunks =
+ dev->n_erased_blocks * dev->param.chunks_per_block;
+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
+ unsigned scattered = 0; /* Free chunks not in an erased block */
+
+ if (erased_chunks < dev->n_free_chunks)
+ scattered = (dev->n_free_chunks - erased_chunks);
+
+ if (!context->bg_running)
+ return 0;
+ else if (scattered < (dev->param.chunks_per_block * 2))
+ return 0;
+ else if (erased_chunks > dev->n_free_chunks / 2)
+ return 0;
+ else if (erased_chunks > dev->n_free_chunks / 4)
+ return 1;
+ else
+ return 2;
}
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *n)
+#ifdef YAFFS_COMPILE_BACKGROUND
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
+struct timer_struct {
+ struct task_struct *task;
+ struct timer_list timer;
+};
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
+static void yaffs_background_waker(struct timer_list *t)
+{
+ struct timer_struct *ts = from_timer(ts, t, timer);
+
+ wake_up_process(ts->task);
+}
#else
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
+void yaffs_background_waker(unsigned long data)
+{
+ wake_up_process((struct task_struct *)data);
+}
#endif
+
+static int yaffs_bg_thread_fn(void *data)
{
- T(YAFFS_TRACE_OS,(TSTR("yaffs_create\n")));
- return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+ struct yaffs_dev *dev = (struct yaffs_dev *)data;
+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
+ unsigned long now = jiffies;
+ unsigned long next_dir_update = now;
+ unsigned long next_gc = now;
+ unsigned long expires;
+ unsigned int urgency;
+
+ int gc_result;
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
+ struct timer_struct timer;
+#else
+ struct timer_list timer;
+#endif
+
+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
+ "yaffs_background starting for dev %p", (void *)dev);
+
+#ifdef YAFFS_COMPILE_FREEZER
+ set_freezable();
+#endif
+ while (context->bg_running) {
+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
+
+ if (kthread_should_stop())
+ break;
+
+#ifdef YAFFS_COMPILE_FREEZER
+ if (try_to_freeze())
+ continue;
+#endif
+ yaffs_gross_lock(dev);
+
+ now = jiffies;
+
+ if (time_after(now, next_dir_update) && yaffs_bg_enable) {
+ yaffs_update_dirty_dirs(dev);
+ next_dir_update = now + HZ;
+ }
+
+ if (time_after(now, next_gc) && yaffs_bg_enable) {
+ if (!dev->is_checkpointed) {
+ urgency = yaffs_bg_gc_urgency(dev);
+ gc_result = yaffs_bg_gc(dev, urgency);
+ if (urgency > 1)
+ next_gc = now + HZ / 20 + 1;
+ else if (urgency > 0)
+ next_gc = now + HZ / 10 + 1;
+ else
+ next_gc = now + HZ * 2;
+ } else {
+ /*
+ * gc not running so set to next_dir_update
+ * to cut down on wake ups
+ */
+ next_gc = next_dir_update;
+ }
+ }
+ yaffs_gross_unlock(dev);
+ expires = next_dir_update;
+ if (time_before(next_gc, expires))
+ expires = next_gc;
+ if (time_before(expires, now))
+ expires = now + HZ;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
+ Y_INIT_TIMER(&timer.timer, yaffs_background_waker);
+ timer.timer.expires = expires + 1;
+ timer.task = current;
+#else
+ Y_INIT_TIMER(&timer);
+ timer.expires = expires + 1;
+ timer.data = (unsigned long)current;
+ timer.function = yaffs_background_waker;
+#endif
+
+ set_current_state(TASK_INTERRUPTIBLE);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
+ add_timer(&timer.timer);
+ schedule();
+ del_timer_sync(&timer.timer);
+#else
+ add_timer(&timer);
+ schedule();
+ del_timer_sync(&timer);
+#endif
+ }
+
+ return 0;
}
-static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+static int yaffs_bg_start(struct yaffs_dev *dev)
{
- int ret_val;
-
- yaffs_dev_t *dev;
- yaffs_obj_t *obj;
+ int retval = 0;
+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_unlink %d:%s\n"),
- (int)(dir->i_ino),
- dentry->d_name.name));
- obj = yaffs_inode_to_obj(dir);
- dev = obj->my_dev;
+ if (dev->read_only)
+ return -1;
- yaffs_gross_lock(dev);
+ context->bg_running = 1;
- ret_val = yaffs_unlinker(obj, dentry->d_name.name);
+ context->bg_thread = kthread_run(yaffs_bg_thread_fn,
+ (void *)dev, "yaffs-bg-%d",
+ context->mount_id);
- if (ret_val == YAFFS_OK) {
- dentry->d_inode->i_nlink--;
- dir->i_version++;
- yaffs_gross_unlock(dev);
- mark_inode_dirty(dentry->d_inode);
- update_dir_time(dir);
- return 0;
+ if (IS_ERR(context->bg_thread)) {
+ retval = PTR_ERR(context->bg_thread);
+ context->bg_thread = NULL;
+ context->bg_running = 0;
}
- yaffs_gross_unlock(dev);
- return -ENOTEMPTY;
+ return retval;
}
-/*
- * Create a link...
- */
-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry)
+static void yaffs_bg_stop(struct yaffs_dev *dev)
{
- struct inode *inode = old_dentry->d_inode;
- yaffs_obj_t *obj = NULL;
- yaffs_obj_t *link = NULL;
- yaffs_dev_t *dev;
+ struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_link\n")));
+ ctxt->bg_running = 0;
- obj = yaffs_inode_to_obj(inode);
- dev = obj->my_dev;
+ if (ctxt->bg_thread) {
+ kthread_stop(ctxt->bg_thread);
+ ctxt->bg_thread = NULL;
+ }
+}
+#else
+static int yaffs_bg_thread_fn(void *data)
+{
+ return 0;
+}
- yaffs_gross_lock(dev);
+static int yaffs_bg_start(struct yaffs_dev *dev)
+{
+ return 0;
+}
- if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
- link = yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
- obj);
+static void yaffs_bg_stop(struct yaffs_dev *dev)
+{
+}
+#endif
- if (link) {
- old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj);
- d_instantiate(dentry, old_dentry->d_inode);
- atomic_inc(&old_dentry->d_inode->i_count);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_link link count %d i_count %d\n"),
- old_dentry->d_inode->i_nlink,
- atomic_read(&old_dentry->d_inode->i_count)));
- }
- yaffs_gross_unlock(dev);
+static void yaffs_flush_inodes(struct super_block *sb)
+{
+ struct inode *iptr;
+ struct yaffs_obj *obj;
- if (link){
- update_dir_time(dir);
- return 0;
+ list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {
+ obj = yaffs_inode_to_obj(iptr);
+ if (obj) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "flushing obj %d",
+ obj->obj_id);
+ yaffs_flush_file(obj, 1, 0, 0);
+ }
}
+}
- return -EPERM;
+static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
+{
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+ if (!dev)
+ return;
+
+ yaffs_flush_inodes(sb);
+ yaffs_update_dirty_dirs(dev);
+ yaffs_flush_whole_cache(dev, 1);
+ if (do_checkpoint)
+ yaffs_checkpoint_save(dev);
}
-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname)
+static LIST_HEAD(yaffs_context_list);
+struct mutex yaffs_context_lock;
+
+static void yaffs_put_super(struct super_block *sb)
{
- yaffs_obj_t *obj;
- yaffs_dev_t *dev;
- uid_t uid = YCRED(current)->fsuid;
- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_symlink\n")));
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
+ "yaffs_put_super");
+
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
+ "Shutting down yaffs background thread");
+ yaffs_bg_stop(dev);
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
+ "yaffs background thread shut down");
- dev = yaffs_inode_to_obj(dir)->my_dev;
yaffs_gross_lock(dev);
- obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
- S_IFLNK | S_IRWXUGO, uid, gid, symname);
- yaffs_gross_unlock(dev);
- if (obj) {
- struct inode *inode;
+ yaffs_flush_super(sb, 1);
- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
- d_instantiate(dentry, inode);
- update_dir_time(dir);
- T(YAFFS_TRACE_OS, (TSTR("symlink created OK\n")));
- return 0;
- } else {
- T(YAFFS_TRACE_OS, (TSTR("symlink not created\n")));
- }
+ yaffs_deinitialise(dev);
- return -ENOMEM;
-}
+ yaffs_gross_unlock(dev);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-static int yaffs_sync_object(struct file *file, int datasync)
-#else
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync)
-#endif
-{
+ mutex_lock(&yaffs_context_lock);
+ list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
+ mutex_unlock(&yaffs_context_lock);
- yaffs_obj_t *obj;
- yaffs_dev_t *dev;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
- struct dentry *dentry = file->f_path.dentry;
-#endif
+ if (yaffs_dev_to_lc(dev)->spare_buffer) {
+ kfree(yaffs_dev_to_lc(dev)->spare_buffer);
+ yaffs_dev_to_lc(dev)->spare_buffer = NULL;
+ }
- obj = yaffs_dentry_to_obj(dentry);
+ kfree(dev);
- dev = obj->my_dev;
+ yaffs_put_mtd_device(mtd);
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
- (TSTR("yaffs_sync_object\n")));
- yaffs_gross_lock(dev);
- yaffs_flush_file(obj, 1, datasync);
- yaffs_gross_unlock(dev);
- return 0;
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
+ "yaffs_put_super done");
}
-/*
- * 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)
+
+static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
{
- yaffs_dev_t *dev;
- int ret_val = YAFFS_FAIL;
- yaffs_obj_t *target;
+ return yaffs_gc_control;
+}
- T(YAFFS_TRACE_OS, (TSTR("yaffs_rename\n")));
- dev = yaffs_inode_to_obj(old_dir)->my_dev;
- yaffs_gross_lock(dev);
+#ifdef YAFFS_COMPILE_EXPORTFS
- /* Check if the target is an existing directory that is not empty. */
- target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
- new_dentry->d_name.name);
+static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
+ uint32_t generation)
+{
+ return Y_IGET(sb, ino);
+}
+static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb,
+ struct fid *fid, int fh_len,
+ int fh_type)
+{
+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
+ yaffs2_nfs_get_inode);
+}
+static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
+ struct fid *fid, int fh_len,
+ int fh_type)
+{
+ return generic_fh_to_parent(sb, fid, fh_len, fh_type,
+ yaffs2_nfs_get_inode);
+}
- if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
- !ylist_empty(&target->variant.dir_variant.children)) {
+struct dentry *yaffs2_get_parent(struct dentry *dentry)
+{
- T(YAFFS_TRACE_OS, (TSTR("target is non-empty dir\n")));
+ struct super_block *sb = dentry->d_inode->i_sb;
+ struct dentry *parent = ERR_PTR(-ENOENT);
+ struct inode *inode;
+ unsigned long parent_ino;
+ struct yaffs_obj *d_obj;
+ struct yaffs_obj *parent_obj;
- ret_val = YAFFS_FAIL;
- } else {
- /* Now does unlinking internally using shadowing mechanism */
- T(YAFFS_TRACE_OS, (TSTR("calling yaffs_rename_obj\n")));
+ d_obj = yaffs_inode_to_obj(dentry->d_inode);
- ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
- old_dentry->d_name.name,
- yaffs_inode_to_obj(new_dir),
- new_dentry->d_name.name);
- }
- yaffs_gross_unlock(dev);
+ if (d_obj) {
+ parent_obj = d_obj->parent;
+ if (parent_obj) {
+ parent_ino = yaffs_get_obj_inode(parent_obj);
+ inode = Y_IGET(sb, parent_ino);
- if (ret_val == YAFFS_OK) {
- if (target) {
- new_dentry->d_inode->i_nlink--;
- mark_inode_dirty(new_dentry->d_inode);
+ if (IS_ERR(inode)) {
+ parent = ERR_CAST(inode);
+ } else {
+ parent = d_obtain_alias(inode);
+ if (!IS_ERR(parent)) {
+ parent = ERR_PTR(-ENOMEM);
+ iput(inode);
+ }
+ }
}
-
- update_dir_time(old_dir);
- if(old_dir != new_dir)
- update_dir_time(new_dir);
- return 0;
- } else {
- return -ENOTEMPTY;
}
-}
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
-{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_dev_t *dev;
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_setattr of object %d\n"),
- yaffs_inode_to_obj(inode)->obj_id));
+ return parent;
+}
- /* Fail if a requested resize >= 2GB */
- if (attr->ia_valid & ATTR_SIZE &&
- (attr->ia_size >> 31))
- error = -EINVAL;
+/* Just declare a zero structure as a NULL value implies
+ * using the default functions of exportfs.
+ */
- if (error == 0)
- error = inode_change_ok(inode, attr);
- if (error == 0) {
- int result;
- if (!error){
- error = yaffs_vfs_setattr(inode, attr);
- T(YAFFS_TRACE_OS,(TSTR("inode_setattr called\n")));
- if (attr->ia_valid & ATTR_SIZE){
- yaffs_vfs_setsize(inode,attr->ia_size);
- inode->i_blocks = (inode->i_size + 511) >> 9;
- }
- }
- dev = yaffs_inode_to_obj(inode)->my_dev;
- if (attr->ia_valid & ATTR_SIZE){
- T(YAFFS_TRACE_OS,(TSTR("resize to %d(%x)\n"),
- (int)(attr->ia_size),(int)(attr->ia_size)));
- }
- yaffs_gross_lock(dev);
- result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
- if(result == YAFFS_OK) {
- error = 0;
- } else {
- error = -EPERM;
- }
- yaffs_gross_unlock(dev);
+static struct export_operations yaffs_export_ops = {
+ .fh_to_dentry = yaffs2_fh_to_dentry,
+ .fh_to_parent = yaffs2_fh_to_parent,
+ .get_parent = yaffs2_get_parent,
+};
- }
+#endif
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_setattr done returning %d\n"),error));
+static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj)
+{
+ /* Clear the association between the inode and
+ * the struct yaffs_obj.
+ */
+ obj->my_inode = NULL;
+ yaffs_inode_to_obj_lv(inode) = NULL;
- return error;
+ /* If the object freeing was deferred, then the real
+ * free happens now.
+ * This should fix the inode inconsistency problem.
+ */
+ yaffs_handle_defered_free(obj);
}
-#ifdef CONFIG_YAFFS_XATTR
-int yaffs_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+#ifdef YAFFS_HAS_EVICT_INODE
+/* yaffs_evict_inode combines into one operation what was previously done in
+ * yaffs_clear_inode() and yaffs_delete_inode()
+ *
+ */
+static void yaffs_evict_inode(struct inode *inode)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_dev_t *dev;
- yaffs_obj_t *obj = yaffs_inode_to_obj(inode);
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
+ int deleteme = 0;
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_setxattr of object %d\n"),
- obj->obj_id));
+ obj = yaffs_inode_to_obj(inode);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_evict_inode: ino %d, count %d %s",
+ (int)inode->i_ino, atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object");
- if (error == 0) {
- int result;
+ if (!inode->i_nlink && !is_bad_inode(inode))
+ deleteme = 1;
+ truncate_inode_pages(&inode->i_data, 0);
+ Y_CLEAR_INODE(inode);
+
+ if (deleteme && obj) {
dev = obj->my_dev;
yaffs_gross_lock(dev);
- result = yaffs_set_xattrib(obj, name, value, size, flags);
- if(result == YAFFS_OK)
- error = 0;
- else if(result < 0)
- error = result;
+ yaffs_del_obj(obj);
yaffs_gross_unlock(dev);
-
}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_setxattr done returning %d\n"),error));
-
- return error;
-}
-
-
-ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
- size_t size)
-{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_dev_t *dev;
- yaffs_obj_t *obj = yaffs_inode_to_obj(inode);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_getxattr \"%s\" from object %d\n"),
- name, obj->obj_id));
-
- if (error == 0) {
+ if (obj) {
dev = obj->my_dev;
yaffs_gross_lock(dev);
- error = yaffs_get_xattrib(obj, name, buff, size);
+ yaffs_unstitch_obj(inode, obj);
yaffs_gross_unlock(dev);
-
}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_getxattr done returning %d\n"),error));
-
- return error;
}
+#else
-int yaffs_removexattr(struct dentry *dentry, const char *name)
+/* clear is called to tell the fs to release any per-inode data it holds.
+ * The object might still exist on disk and is just being thrown out of the cache
+ * or else the object has actually been deleted and we're being called via
+ * the chain
+ * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
+ */
+
+static void yaffs_clear_inode(struct inode *inode)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_dev_t *dev;
- yaffs_obj_t *obj = yaffs_inode_to_obj(inode);
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_removexattr of object %d\n"),
- obj->obj_id));
+ obj = yaffs_inode_to_obj(inode);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_clear_inode: ino %d, count %d %s",
+ (int)inode->i_ino, atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object");
- if (error == 0) {
- int result;
+ if (obj) {
dev = obj->my_dev;
yaffs_gross_lock(dev);
- result = yaffs_remove_xattrib(obj, name);
- if(result == YAFFS_OK)
- error = 0;
- else if(result < 0)
- error = result;
+ yaffs_unstitch_obj(inode, obj);
yaffs_gross_unlock(dev);
-
}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_removexattr done returning %d\n"),error));
- return error;
}
-ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size)
+/* 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)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_dev_t *dev;
- yaffs_obj_t *obj = yaffs_inode_to_obj(inode);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_listxattr of object %d\n"),
- obj->obj_id));
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+ struct yaffs_dev *dev;
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_delete_inode: ino %d, count %d %s",
+ (int)inode->i_ino, atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object");
- if (error == 0) {
+ if (obj) {
dev = obj->my_dev;
yaffs_gross_lock(dev);
- error = yaffs_list_xattrib(obj, buff, size);
+ yaffs_del_obj(obj);
yaffs_gross_unlock(dev);
-
}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_listxattr done returning %d\n"),error));
-
- return error;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+ truncate_inode_pages(&inode->i_data, 0);
+#endif
+ clear_inode(inode);
}
-
#endif
+
+
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
- yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev;
+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
struct super_block *sb = dentry->d_sb;
#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
{
- yaffs_dev_t *dev = yaffs_super_to_dev(sb);
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
#else
static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
{
- yaffs_dev_t *dev = yaffs_super_to_dev(sb);
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
#endif
- T(YAFFS_TRACE_OS, (TSTR("yaffs_statfs\n")));
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs");
yaffs_gross_lock(dev);
uint64_t bytes_in_dev;
uint64_t bytes_free;
- bytes_in_dev = ((uint64_t)((dev->param.end_block - dev->param.start_block + 1))) *
- ((uint64_t)(dev->param.chunks_per_block * dev->data_bytes_per_chunk));
+ bytes_in_dev =
+ ((uint64_t)
+ ((dev->param.end_block - dev->param.start_block +
+ 1))) * ((uint64_t) (dev->param.chunks_per_block *
+ dev->data_bytes_per_chunk));
- do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */
+ do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */
buf->f_blocks = bytes_in_dev;
- bytes_free = ((uint64_t)(yaffs_get_n_free_chunks(dev))) *
- ((uint64_t)(dev->data_bytes_per_chunk));
+ bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) *
+ ((uint64_t) (dev->data_bytes_per_chunk));
do_div(bytes_free, sb->s_blocksize);
} else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
buf->f_blocks =
- (dev->param.end_block - dev->param.start_block + 1) *
- dev->param.chunks_per_block /
- (sb->s_blocksize / dev->data_bytes_per_chunk);
+ (dev->param.end_block - dev->param.start_block + 1) *
+ dev->param.chunks_per_block /
+ (sb->s_blocksize / dev->data_bytes_per_chunk);
buf->f_bfree =
- yaffs_get_n_free_chunks(dev) /
- (sb->s_blocksize / dev->data_bytes_per_chunk);
+ yaffs_get_n_free_chunks(dev) /
+ (sb->s_blocksize / dev->data_bytes_per_chunk);
} else {
buf->f_blocks =
- (dev->param.end_block - dev->param.start_block + 1) *
- dev->param.chunks_per_block *
- (dev->data_bytes_per_chunk / sb->s_blocksize);
+ (dev->param.end_block - dev->param.start_block + 1) *
+ dev->param.chunks_per_block *
+ (dev->data_bytes_per_chunk / sb->s_blocksize);
buf->f_bfree =
- yaffs_get_n_free_chunks(dev) *
- (dev->data_bytes_per_chunk / sb->s_blocksize);
+ yaffs_get_n_free_chunks(dev) *
+ (dev->data_bytes_per_chunk / sb->s_blocksize);
}
buf->f_files = 0;
-static void yaffs_flush_inodes(struct super_block *sb)
-{
- struct inode *iptr;
- yaffs_obj_t *obj;
-
- list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){
- obj = yaffs_inode_to_obj(iptr);
- if(obj){
- T(YAFFS_TRACE_OS, (TSTR("flushing obj %d\n"),
- obj->obj_id));
- yaffs_flush_file(obj,1,0);
- }
- }
-}
-
-
-static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
-{
- yaffs_dev_t *dev = yaffs_super_to_dev(sb);
- if(!dev)
- return;
-
- yaffs_flush_inodes(sb);
- yaffs_update_dirty_dirs(dev);
- yaffs_flush_whole_cache(dev);
- if(do_checkpoint)
- yaffs_checkpoint_save(dev);
-}
-
-
-static unsigned yaffs_bg_gc_urgency(yaffs_dev_t *dev)
-{
- unsigned erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block;
- struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
- unsigned scattered = 0; /* Free chunks not in an erased block */
-
- if(erased_chunks < dev->n_free_chunks)
- scattered = (dev->n_free_chunks - erased_chunks);
-
- if(!context->bg_running)
- return 0;
- else if(scattered < (dev->param.chunks_per_block * 2))
- return 0;
- else if(erased_chunks > dev->n_free_chunks/2)
- return 0;
- else if(erased_chunks > dev->n_free_chunks/4)
- return 1;
- else
- return 2;
-}
-
-static int yaffs_do_sync_fs(struct super_block *sb,
- int request_checkpoint)
+static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
{
- yaffs_dev_t *dev = yaffs_super_to_dev(sb);
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
int do_checkpoint;
+ int dirty = yaffs_check_super_dirty(dev);
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs_do_sync_fs: gc-urgency %d %s %s%s\n"),
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
+ "yaffs_do_sync_fs: gc-urgency %d %s %s%s",
gc_urgent,
- sb->s_dirt ? "dirty" : "clean",
+ dirty ? "dirty" : "clean",
request_checkpoint ? "checkpoint requested" : "no checkpoint",
- oneshot_checkpoint ? " one-shot" : "" ));
+ oneshot_checkpoint ? " one-shot" : "");
yaffs_gross_lock(dev);
do_checkpoint = ((request_checkpoint && !gc_urgent) ||
- oneshot_checkpoint) &&
- !dev->is_checkpointed;
+ oneshot_checkpoint) && !dev->is_checkpointed;
- if (sb->s_dirt || do_checkpoint) {
+ if (dirty || do_checkpoint) {
yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
- sb->s_dirt = 0;
- if(oneshot_checkpoint)
+ yaffs_clear_super_dirty(dev);
+ if (oneshot_checkpoint)
yaffs_auto_checkpoint &= ~4;
}
yaffs_gross_unlock(dev);
return 0;
}
-/*
- * yaffs background thread functions .
- * yaffs_bg_thread_fn() the thread function
- * yaffs_bg_start() launches the background thread.
- * yaffs_bg_stop() cleans up the background thread.
- *
- * NB:
- * The thread should only run after the yaffs is initialised
- * The thread should be stopped before yaffs is unmounted.
- * The thread should not do any writing while the fs is in read only.
- */
-
-#ifdef YAFFS_COMPILE_BACKGROUND
-
-void yaffs_background_waker(unsigned long data)
-{
- wake_up_process((struct task_struct *)data);
-}
-
-static int yaffs_bg_thread_fn(void *data)
-{
- yaffs_dev_t *dev = (yaffs_dev_t *)data;
- struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
- unsigned long now = jiffies;
- unsigned long next_dir_update = now;
- unsigned long next_gc = now;
- unsigned long expires;
- unsigned int urgency;
-
- int gc_result;
- struct timer_list timer;
-
- T(YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs_background starting for dev %p\n"),
- (void *)dev));
-
-#ifdef YAFFS_COMPILE_FREEZER
- set_freezable();
-#endif
- while(context->bg_running){
- T(YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs_background\n")));
-
- if(kthread_should_stop())
- break;
-
-#ifdef YAFFS_COMPILE_FREEZER
- if(try_to_freeze())
- continue;
-#endif
- yaffs_gross_lock(dev);
-
- now = jiffies;
-
- if(time_after(now, next_dir_update) && yaffs_bg_enable){
- yaffs_update_dirty_dirs(dev);
- next_dir_update = now + HZ;
- }
-
- if(time_after(now,next_gc) && yaffs_bg_enable){
- if(!dev->is_checkpointed){
- urgency = yaffs_bg_gc_urgency(dev);
- gc_result = yaffs_bg_gc(dev, urgency);
- if(urgency > 1)
- next_gc = now + HZ/20+1;
- else if(urgency > 0)
- next_gc = now + HZ/10+1;
- else
- next_gc = now + HZ * 2;
- } else /*
- * gc not running so set to next_dir_update
- * to cut down on wake ups
- */
- next_gc = next_dir_update;
- }
- yaffs_gross_unlock(dev);
-#if 1
- expires = next_dir_update;
- if (time_before(next_gc,expires))
- expires = next_gc;
- if(time_before(expires,now))
- expires = now + HZ;
-
- Y_INIT_TIMER(&timer);
- timer.expires = expires+1;
- timer.data = (unsigned long) current;
- timer.function = yaffs_background_waker;
-
- set_current_state(TASK_INTERRUPTIBLE);
- add_timer(&timer);
- schedule();
- del_timer_sync(&timer);
-#else
- msleep(10);
-#endif
- }
-
- return 0;
-}
-
-static int yaffs_bg_start(yaffs_dev_t *dev)
-{
- int retval = 0;
- struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-
- if(dev->read_only)
- return -1;
-
- context->bg_running = 1;
-
- context->bg_thread = kthread_run(yaffs_bg_thread_fn,
- (void *)dev,"yaffs-bg-%d",context->mount_id);
-
- if(IS_ERR(context->bg_thread)){
- retval = PTR_ERR(context->bg_thread);
- context->bg_thread = NULL;
- context->bg_running = 0;
- }
- return retval;
-}
-
-static void yaffs_bg_stop(yaffs_dev_t *dev)
-{
- struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev);
-
- ctxt->bg_running = 0;
-
- if( ctxt->bg_thread){
- kthread_stop(ctxt->bg_thread);
- ctxt->bg_thread = NULL;
- }
-}
-#else
-static int yaffs_bg_thread_fn(void *data)
-{
- return 0;
-}
-
-static int yaffs_bg_start(yaffs_dev_t *dev)
-{
- return 0;
-}
-
-static void yaffs_bg_stop(yaffs_dev_t *dev)
-{
-}
-#endif
-
+#ifdef YAFFS_HAS_WRITE_SUPER
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
static void yaffs_write_super(struct super_block *sb)
-#else
-static int yaffs_write_super(struct super_block *sb)
-#endif
-{
- unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
-
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs_write_super%s\n"),
- request_checkpoint ? " checkpt" : ""));
-
- yaffs_do_sync_fs(sb, request_checkpoint);
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
- return 0;
-#endif
-}
-
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_sync_fs(struct super_block *sb, int wait)
-#else
-static int yaffs_sync_fs(struct super_block *sb)
-#endif
-{
- unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
-
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
- (TSTR("yaffs_sync_fs%s\n"),
- request_checkpoint ? " checkpt" : ""));
-
- yaffs_do_sync_fs(sb, request_checkpoint);
-
- return 0;
-}
-
-#ifdef YAFFS_USE_OWN_IGET
-
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-{
- struct inode *inode;
- yaffs_obj_t *obj;
- yaffs_dev_t *dev = yaffs_super_to_dev(sb);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_iget for %lu\n"), ino));
-
- inode = iget_locked(sb, ino);
- if (!inode)
- return ERR_PTR(-ENOMEM);
- if (!(inode->i_state & I_NEW))
- return inode;
-
- /* NB This is called as a side effect of other functions, but
- * we had to release the lock to prevent deadlocks, so
- * need to lock again.
- */
-
- yaffs_gross_lock(dev);
-
- obj = yaffs_find_by_number(dev, inode->i_ino);
-
- yaffs_fill_inode_from_obj(inode, obj);
-
- yaffs_gross_unlock(dev);
-
- unlock_new_inode(inode);
- return inode;
-}
-
-#else
-
-static void yaffs_read_inode(struct inode *inode)
-{
- /* NB This is called as a side effect of other functions, but
- * we had to release the lock to prevent deadlocks, so
- * need to lock again.
- */
-
- yaffs_obj_t *obj;
- yaffs_dev_t *dev = yaffs_super_to_dev(inode->i_sb);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_read_inode for %d\n"), (int)inode->i_ino));
-
- if(current != yaffs_dev_to_lc(dev)->readdir_process)
- yaffs_gross_lock(dev);
-
- obj = yaffs_find_by_number(dev, inode->i_ino);
-
- yaffs_fill_inode_from_obj(inode, obj);
-
- if(current != yaffs_dev_to_lc(dev)->readdir_process)
- yaffs_gross_unlock(dev);
-}
-
+#else
+static int yaffs_write_super(struct super_block *sb)
#endif
-
-static YLIST_HEAD(yaffs_context_list);
-struct semaphore yaffs_context_lock;
-
-static void yaffs_put_super(struct super_block *sb)
{
- yaffs_dev_t *dev = yaffs_super_to_dev(sb);
-
- T(YAFFS_TRACE_OS, (TSTR("yaffs_put_super\n")));
+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
- T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
- (TSTR("Shutting down yaffs background thread\n")));
- yaffs_bg_stop(dev);
- T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs background thread shut down\n")));
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
+ "yaffs_write_super %s",
+ request_checkpoint ? " checkpt" : "");
- yaffs_gross_lock(dev);
+ yaffs_do_sync_fs(sb, request_checkpoint);
- yaffs_flush_super(sb,1);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
+ return 0;
+#endif
+}
+#endif
- if (yaffs_dev_to_lc(dev)->put_super_fn)
- yaffs_dev_to_lc(dev)->put_super_fn(sb);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_sync_fs(struct super_block *sb, int wait)
+#else
+static int yaffs_sync_fs(struct super_block *sb)
+#endif
+{
+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
+ "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : "");
- yaffs_deinitialise(dev);
+ yaffs_do_sync_fs(sb, request_checkpoint);
- yaffs_gross_unlock(dev);
+ return 0;
+}
- down(&yaffs_context_lock);
- ylist_del_init(&(yaffs_dev_to_lc(dev)->context_list));
- up(&yaffs_context_lock);
+/* the function only is used to change dev->read_only when this file system
+ * is remounted.
+ */
+static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
+{
+ int read_only = 0;
+ int was_read_only = 0;
+ struct mtd_info *mtd;
+ struct yaffs_dev *dev = 0;
- if (yaffs_dev_to_lc(dev)->spare_buffer) {
- YFREE(yaffs_dev_to_lc(dev)->spare_buffer);
- yaffs_dev_to_lc(dev)->spare_buffer = NULL;
+ /* Get the device */
+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
+ if (!mtd) {
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "MTD device #%u doesn't appear to exist",
+ MINOR(sb->s_dev));
+ return 1;
}
- kfree(dev);
-}
+ /* Check it's NAND */
+ if (mtd->type != MTD_NANDFLASH) {
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "MTD device is not NAND it's type %d",
+ mtd->type);
+ return 1;
+ }
+ read_only = ((*flags & MS_RDONLY) != 0);
+ if (!read_only && !(mtd->flags & MTD_WRITEABLE)) {
+ read_only = 1;
+ printk(KERN_INFO
+ "yaffs: mtd is read only, setting superblock read only");
+ *flags |= MS_RDONLY;
+ }
-static void yaffs_mtd_put_super(struct super_block *sb)
-{
- struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_super_to_dev(sb));
+ dev = sb->s_fs_info;
+ was_read_only = dev->read_only;
+ dev->read_only = read_only;
- if (mtd->sync)
- mtd->sync(mtd);
+ if (was_read_only && !read_only) {
+ yaffs_gross_lock(dev);
+ yaffs_guts_cleanup(dev);
+ yaffs_gross_unlock(dev);
+ yaffs_bg_start(dev);
+ } else if (!was_read_only && read_only) {
+ yaffs_bg_stop(dev);
+ }
- put_mtd_device(mtd);
+ return 0;
}
+static const struct super_operations yaffs_super_ops = {
+ .statfs = yaffs_statfs,
-static void yaffs_touch_super(yaffs_dev_t *dev)
-{
- struct super_block *sb = yaffs_dev_to_lc(dev)->super;
-
- T(YAFFS_TRACE_OS, (TSTR("yaffs_touch_super() sb = %p\n"), sb));
- if (sb)
- sb->s_dirt = 1;
-}
+#ifndef YAFFS_USE_OWN_IGET
+ .read_inode = yaffs_read_inode,
+#endif
+#ifdef YAFFS_HAS_PUT_INODE
+ .put_inode = yaffs_put_inode,
+#endif
+ .put_super = yaffs_put_super,
+#ifdef YAFFS_HAS_EVICT_INODE
+ .evict_inode = yaffs_evict_inode,
+#else
+ .delete_inode = yaffs_delete_inode,
+ .clear_inode = yaffs_clear_inode,
+#endif
+ .sync_fs = yaffs_sync_fs,
+#ifdef YAFFS_HAS_WRITE_SUPER
+ .write_super = yaffs_write_super,
+#endif
+ .remount_fs = yaffs_remount_fs,
+};
-typedef struct {
+struct yaffs_options {
int inband_tags;
int skip_checkpoint_read;
int skip_checkpoint_write;
int lazy_loading_overridden;
int empty_lost_and_found;
int empty_lost_and_found_overridden;
-} yaffs_options;
+ int disable_summary;
+};
#define MAX_OPT_LEN 30
-static int yaffs_parse_options(yaffs_options *options, const char *options_str)
+static int yaffs_parse_options(struct yaffs_options *options,
+ const char *options_str)
{
char cur_opt[MAX_OPT_LEN + 1];
int p;
memset(cur_opt, 0, MAX_OPT_LEN + 1);
p = 0;
- while(*options_str == ',')
+ while (*options_str == ',')
options_str++;
while (*options_str && *options_str != ',') {
options_str++;
}
- if (!strcmp(cur_opt, "inband-tags"))
+ if (!strcmp(cur_opt, "inband-tags")) {
options->inband_tags = 1;
- else if (!strcmp(cur_opt, "tags-ecc-off")){
+ } else if (!strcmp(cur_opt, "tags-ecc-off")) {
options->tags_ecc_on = 0;
- options->tags_ecc_overridden=1;
- } else if (!strcmp(cur_opt, "tags-ecc-on")){
+ options->tags_ecc_overridden = 1;
+ } else if (!strcmp(cur_opt, "tags-ecc-on")) {
options->tags_ecc_on = 1;
options->tags_ecc_overridden = 1;
- } else if (!strcmp(cur_opt, "lazy-loading-off")){
+ } else if (!strcmp(cur_opt, "lazy-loading-off")) {
options->lazy_loading_enabled = 0;
- options->lazy_loading_overridden=1;
- } else if (!strcmp(cur_opt, "lazy-loading-on")){
+ options->lazy_loading_overridden = 1;
+ } else if (!strcmp(cur_opt, "lazy-loading-on")) {
options->lazy_loading_enabled = 1;
options->lazy_loading_overridden = 1;
- } else if (!strcmp(cur_opt, "empty-lost-and-found-off")){
+ } else if (!strcmp(cur_opt, "disable-summary")) {
+ options->disable_summary = 1;
+ } else if (!strcmp(cur_opt, "empty-lost-and-found-off")) {
options->empty_lost_and_found = 0;
- options->empty_lost_and_found_overridden=1;
- } else if (!strcmp(cur_opt, "empty-lost-and-found-on")){
+ options->empty_lost_and_found_overridden = 1;
+ } else if (!strcmp(cur_opt, "empty-lost-and-found-on")) {
options->empty_lost_and_found = 1;
- options->empty_lost_and_found_overridden=1;
- } else if (!strcmp(cur_opt, "no-cache"))
+ options->empty_lost_and_found_overridden = 1;
+ } else if (!strcmp(cur_opt, "no-cache")) {
options->no_cache = 1;
- else if (!strcmp(cur_opt, "no-checkpoint-read"))
+ } else if (!strcmp(cur_opt, "no-checkpoint-read")) {
options->skip_checkpoint_read = 1;
- else if (!strcmp(cur_opt, "no-checkpoint-write"))
+ } else if (!strcmp(cur_opt, "no-checkpoint-write")) {
options->skip_checkpoint_write = 1;
- else if (!strcmp(cur_opt, "no-checkpoint")) {
+ } else if (!strcmp(cur_opt, "no-checkpoint")) {
options->skip_checkpoint_read = 1;
options->skip_checkpoint_write = 1;
} else {
printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
- cur_opt);
+ cur_opt);
error = 1;
}
}
return error;
}
+
+static struct dentry *yaffs_make_root(struct inode *inode)
+{
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
+ struct dentry *root = d_alloc_root(inode);
+
+ if (!root)
+ iput(inode);
+
+ return root;
+#else
+ return d_make_root(inode);
+#endif
+}
+
+
+
+
static struct super_block *yaffs_internal_read_super(int yaffs_version,
- struct super_block *sb,
- void *data, int silent)
+ struct super_block *sb,
+ void *data, int silent)
{
int n_blocks;
struct inode *inode = NULL;
struct dentry *root;
- yaffs_dev_t *dev = 0;
+ struct yaffs_dev *dev = 0;
char devname_buf[BDEVNAME_SIZE + 1];
struct mtd_info *mtd;
int err;
char *data_str = (char *)data;
struct yaffs_linux_context *context = NULL;
- yaffs_param_t *param;
+ struct yaffs_param *param;
int read_only = 0;
+ int inband_tags = 0;
- yaffs_options options;
+ struct yaffs_options options;
unsigned mount_id;
int found;
struct yaffs_linux_context *context_iterator;
- struct ylist_head *l;
+ struct list_head *l;
+
+ if (!sb) {
+ printk(KERN_INFO "yaffs: sb is NULL\n");
+ return NULL;
+ }
sb->s_magic = YAFFS_MAGIC;
sb->s_op = &yaffs_super_ops;
sb->s_flags |= MS_NOATIME;
- read_only =((sb->s_flags & MS_RDONLY) != 0);
-
+ read_only = ((sb->s_flags & MS_RDONLY) != 0);
#ifdef YAFFS_COMPILE_EXPORTFS
sb->s_export_op = &yaffs_export_ops;
#endif
- if (!sb)
- printk(KERN_INFO "yaffs: sb is NULL\n");
- else if (!sb->s_dev)
+ if (!sb->s_dev)
printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
else if (!yaffs_devname(sb, devname_buf))
printk(KERN_INFO "yaffs: devname is NULL\n");
else
printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n",
sb->s_dev,
- yaffs_devname(sb, devname_buf),
- read_only ? "ro" : "rw");
+ yaffs_devname(sb, devname_buf), read_only ? "ro" : "rw");
if (!data_str)
data_str = "";
return NULL;
}
-
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_read_super: Using yaffs%d\n"), yaffs_version));
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_read_super: block size %d\n"),
- (int)(sb->s_blocksize)));
-
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Attempting MTD mount of %u.%u,\"%s\"\n"),
- MAJOR(sb->s_dev), MINOR(sb->s_dev),
- yaffs_devname(sb, devname_buf)));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_read_super: Using yaffs%d", yaffs_version);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_read_super: block size %d", (int)(sb->s_blocksize));
- /* Check it's an mtd device..... */
- if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
- return NULL; /* This isn't an mtd device */
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs: Attempting MTD mount of %u.%u,\"%s\"",
+ MAJOR(sb->s_dev), MINOR(sb->s_dev),
+ yaffs_devname(sb, devname_buf));
/* Get the device */
mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
- if (!mtd) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("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,
- (TSTR("yaffs: MTD device is not NAND it's type %d\n"),
- mtd->type));
+ if (IS_ERR(mtd)) {
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs: MTD device %u either not valid or unavailable",
+ MINOR(sb->s_dev));
return NULL;
}
- T(YAFFS_TRACE_OS, (TSTR(" erase %p\n"), mtd->erase));
- T(YAFFS_TRACE_OS, (TSTR(" read %p\n"), mtd->read));
- T(YAFFS_TRACE_OS, (TSTR(" write %p\n"), mtd->write));
- T(YAFFS_TRACE_OS, (TSTR(" readoob %p\n"), mtd->read_oob));
- T(YAFFS_TRACE_OS, (TSTR(" writeoob %p\n"), mtd->write_oob));
- T(YAFFS_TRACE_OS, (TSTR(" block_isbad %p\n"), mtd->block_isbad));
- T(YAFFS_TRACE_OS, (TSTR(" block_markbad %p\n"), mtd->block_markbad));
- T(YAFFS_TRACE_OS, (TSTR(" %s %d\n"), WRITE_SIZE_STR, WRITE_SIZE(mtd)));
- T(YAFFS_TRACE_OS, (TSTR(" oobsize %d\n"), mtd->oobsize));
- T(YAFFS_TRACE_OS, (TSTR(" erasesize %d\n"), mtd->erasesize));
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
- T(YAFFS_TRACE_OS, (TSTR(" size %u\n"), mtd->size));
-#else
- T(YAFFS_TRACE_OS, (TSTR(" size %lld\n"), mtd->size));
-#endif
-
-#ifdef CONFIG_YAFFS_AUTO_YAFFS2
-
- if (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: auto selecting yaffs2\n")));
+ if (yaffs_auto_select && yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2");
yaffs_version = 2;
}
/* Added NCB 26/5/2006 for completeness */
- if (yaffs_version == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: auto selecting yaffs1\n")));
+ if (yaffs_version == 2 && !options.inband_tags
+ && WRITE_SIZE(mtd) == 512) {
+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1");
yaffs_version = 1;
}
-#endif
-
- if (yaffs_version == 2) {
- /* Check for version 2 style functions */
- if (!mtd->erase ||
- !mtd->block_isbad ||
- !mtd->block_markbad ||
- !mtd->read ||
- !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- !mtd->read_oob || !mtd->write_oob) {
-#else
- !mtd->write_ecc ||
- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
-#endif
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: MTD device does not support required "
- "functions\n")));
- return NULL;
- }
-
- if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
- mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
- !options.inband_tags) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: MTD device does not have the "
- "right page sizes\n")));
- return NULL;
- }
- } else {
- /* Check for V1 style functions */
- if (!mtd->erase ||
- !mtd->read ||
- !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- !mtd->read_oob || !mtd->write_oob) {
-#else
- !mtd->write_ecc ||
- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
-#endif
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: MTD device does not support required "
- "functions\n")));
- return NULL;
- }
+ if (mtd->oobavail < sizeof(struct yaffs_packed_tags2) ||
+ options.inband_tags)
+ inband_tags = 1;
- if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
- mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: MTD device does not support have the "
- "right page sizes\n")));
- return NULL;
- }
- }
+ if(yaffs_verify_mtd(mtd, yaffs_version, inband_tags) < 0)
+ 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_dev_t up for mtd
+ * Set the struct yaffs_dev up for mtd
*/
- if (!read_only && !(mtd->flags & MTD_WRITEABLE)){
+ if (!read_only && !(mtd->flags & MTD_WRITEABLE)) {
read_only = 1;
- printk(KERN_INFO "yaffs: mtd is read only, setting superblock read only");
+ printk(KERN_INFO
+ "yaffs: mtd is read only, setting superblock read only\n"
+ );
sb->s_flags |= MS_RDONLY;
}
- dev = kmalloc(sizeof(yaffs_dev_t), GFP_KERNEL);
- context = kmalloc(sizeof(struct yaffs_linux_context),GFP_KERNEL);
-
- if(!dev || !context ){
- if(dev)
- kfree(dev);
- if(context)
- kfree(context);
+ dev = kmalloc(sizeof(struct yaffs_dev), GFP_KERNEL);
+ context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL);
+
+ if (!dev || !context) {
+ kfree(dev);
+ kfree(context);
dev = NULL;
context = NULL;
- }
- if (!dev) {
/* Deep shit could not allocate device structure */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs_read_super: Failed trying to allocate "
- "yaffs_dev_t. \n")));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs_read_super: Failed trying to allocate struct yaffs_dev."
+ );
return NULL;
}
- memset(dev, 0, sizeof(yaffs_dev_t));
+ memset(dev, 0, sizeof(struct yaffs_dev));
param = &(dev->param);
- memset(context,0,sizeof(struct yaffs_linux_context));
+ memset(context, 0, sizeof(struct yaffs_linux_context));
dev->os_context = context;
- YINIT_LIST_HEAD(&(context->context_list));
+ INIT_LIST_HEAD(&(context->context_list));
context->dev = dev;
context->super = sb;
#else
sb->u.generic_sbp = dev;
#endif
-
+
+
dev->driver_context = mtd;
param->name = mtd->name;
/* Set up the memory size parameters.... */
- n_blocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
- param->start_block = 0;
- param->end_block = n_blocks - 1;
- param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK;
- param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK;
param->n_reserved_blocks = 5;
param->n_caches = (options.no_cache) ? 0 : 10;
- param->inband_tags = options.inband_tags;
+ param->inband_tags = inband_tags;
-#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
- param->disable_lazy_load = 1;
-#endif
-#ifdef CONFIG_YAFFS_XATTR
param->enable_xattr = 1;
-#endif
- if(options.lazy_loading_overridden)
+ if (options.lazy_loading_overridden)
param->disable_lazy_load = !options.lazy_loading_enabled;
-#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC
- param->no_tags_ecc = 1;
-#endif
-
-#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND
-#else
param->defered_dir_update = 1;
-#endif
- if(options.tags_ecc_overridden)
+ if (options.tags_ecc_overridden)
param->no_tags_ecc = !options.tags_ecc_on;
-#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
param->empty_lost_n_found = 1;
-#endif
-
-#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING
- param->refresh_period = 0;
-#else
param->refresh_period = 500;
-#endif
+ param->disable_summary = options.disable_summary;
-#ifdef CONFIG_YAFFS__ALWAYS_CHECK_CHUNK_ERASED
- param->always_check_erased = 1;
-#endif
- if(options.empty_lost_and_found_overridden)
+#ifdef CONFIG_YAFFS_DISABLE_BAD_BLOCK_MARKING
+ param->disable_bad_block_marking = 1;
+#endif
+ if (options.empty_lost_and_found_overridden)
param->empty_lost_n_found = options.empty_lost_and_found;
/* ... and the functions. */
if (yaffs_version == 2) {
- param->write_chunk_tags_fn =
- nandmtd2_write_chunk_tags;
- param->read_chunk_tags_fn =
- nandmtd2_read_chunk_tags;
- param->bad_block_fn = nandmtd2_mark_block_bad;
- param->query_block_fn = nandmtd2_query_block;
- yaffs_dev_to_lc(dev)->spare_buffer = YMALLOC(mtd->oobsize);
param->is_yaffs2 = 1;
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
param->total_bytes_per_chunk = mtd->writesize;
param->start_block = 0;
param->end_block = n_blocks - 1;
} else {
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- /* use the MTD interface in yaffs_mtdif1.c */
- param->write_chunk_tags_fn =
- nandmtd1_write_chunk_tags;
- param->read_chunk_tags_fn =
- nandmtd1_read_chunk_tags;
- param->bad_block_fn = nandmtd1_mark_block_bad;
- param->query_block_fn = nandmtd1_query_block;
-#else
- param->write_chunk_fn = nandmtd_write_chunk;
- param->read_chunk_fn = nandmtd_read_chunk;
-#endif
param->is_yaffs2 = 0;
+ n_blocks = YCALCBLOCKS(mtd->size,
+ YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
+
+ param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK;
+ param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK;
}
- /* ... and common functions */
- param->erase_fn = nandmtd_erase_block;
- param->initialise_flash_fn = nandmtd_initialise;
- yaffs_dev_to_lc(dev)->put_super_fn = yaffs_mtd_put_super;
+ param->start_block = 0;
+ param->end_block = n_blocks - 1;
- param->sb_dirty_fn = yaffs_touch_super;
- param->gc_control = yaffs_gc_control_callback;
+ yaffs_mtd_drv_install(dev);
- yaffs_dev_to_lc(dev)->super= sb;
-
+ param->sb_dirty_fn = yaffs_set_super_dirty;
+ param->gc_control_fn = yaffs_gc_control_callback;
-#ifndef CONFIG_YAFFS_DOES_ECC
- param->use_nand_ecc = 1;
-#endif
+ yaffs_dev_to_lc(dev)->super = sb;
-#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
- param->wide_tnodes_disabled = 1;
-#endif
+ param->use_nand_ecc = 1;
param->skip_checkpt_rd = options.skip_checkpoint_read;
param->skip_checkpt_wr = options.skip_checkpoint_write;
- down(&yaffs_context_lock);
+ mutex_lock(&yaffs_context_lock);
/* Get a mount id */
found = 0;
- for(mount_id=0; ! found; mount_id++){
+ for (mount_id = 0; !found; mount_id++) {
found = 1;
- ylist_for_each(l,&yaffs_context_list){
- context_iterator = ylist_entry(l,struct yaffs_linux_context,context_list);
- if(context_iterator->mount_id == mount_id)
+ list_for_each(l, &yaffs_context_list) {
+ context_iterator =
+ list_entry(l, struct yaffs_linux_context,
+ context_list);
+ if (context_iterator->mount_id == mount_id)
found = 0;
}
}
context->mount_id = mount_id;
- ylist_add_tail(&(yaffs_dev_to_lc(dev)->context_list), &yaffs_context_list);
- up(&yaffs_context_lock);
+ list_add_tail(&(yaffs_dev_to_lc(dev)->context_list),
+ &yaffs_context_list);
+ mutex_unlock(&yaffs_context_lock);
- /* Directory search handling...*/
- YINIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts));
- param->remove_obj_fn = yaffs_remove_obj_callback;
+ /* Directory search handling... */
+ INIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts));
+ param->remove_obj_fn = yaffs_remove_obj_callback;
- init_MUTEX(&(yaffs_dev_to_lc(dev)->gross_lock));
+ mutex_init(&(yaffs_dev_to_lc(dev)->gross_lock));
yaffs_gross_lock(dev);
err = yaffs_guts_initialise(dev);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_read_super: guts initialised %s\n"),
- (err == YAFFS_OK) ? "OK" : "FAILED"));
-
- if(err == YAFFS_OK)
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_read_super: guts initialised %s",
+ (err == YAFFS_OK) ? "OK" : "FAILED");
+
+ if (err == YAFFS_OK)
yaffs_bg_start(dev);
-
- if(!context->bg_thread)
+
+ if (!context->bg_thread)
param->defered_dir_update = 0;
+ sb->s_maxbytes = yaffs_max_file_size(dev);
/* Release lock before yaffs_get_inode() */
yaffs_gross_unlock(dev);
/* Create root inode */
if (err == YAFFS_OK)
- inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
- yaffs_root(dev));
+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, yaffs_root(dev));
if (!inode)
return NULL;
inode->i_op = &yaffs_dir_inode_operations;
inode->i_fop = &yaffs_dir_operations;
- T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: got root inode\n")));
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode");
- root = d_alloc_root(inode);
+ root = yaffs_make_root(inode);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: d_alloc_root done\n")));
-
- if (!root) {
- iput(inode);
+ if (!root)
return NULL;
- }
+
sb->s_root = root;
- sb->s_dirt = !dev->is_checkpointed;
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs_read_super: is_checkpointed %d\n"),
- dev->is_checkpointed));
+ if(!dev->is_checkpointed)
+ yaffs_set_super_dirty(dev);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: done\n")));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs_read_super: is_checkpointed %d",
+ dev->is_checkpointed);
+
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done");
return sb;
}
-
#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, sb, data, silent) ? 0 : -EINVAL;
}
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static struct dentry *yaffs_mount(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, yaffs_internal_read_super_mtd);
+}
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
static int yaffs_read_super(struct file_system_type *fs,
int flags, const char *dev_name,
void *data, struct vfsmount *mnt)
static struct file_system_type yaffs_fs_type = {
.owner = THIS_MODULE,
.name = "yaffs",
- .get_sb = yaffs_read_super,
- .kill_sb = kill_block_super,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+ .mount = yaffs_mount,
+#else
+ .get_sb = yaffs_read_super,
+#endif
+ .kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
#else
#endif
-#ifdef CONFIG_YAFFS_YAFFS2
-
#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, sb, data, silent) ? 0 : -EINVAL;
}
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static struct dentry *yaffs2_mount(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, yaffs2_internal_read_super_mtd);
+}
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
static int yaffs2_read_super(struct file_system_type *fs,
- int flags, const char *dev_name, void *data,
- struct vfsmount *mnt)
+ int flags, const char *dev_name, void *data,
+ struct vfsmount *mnt)
{
return get_sb_bdev(fs, flags, dev_name, data,
- yaffs2_internal_read_super_mtd, mnt);
+ yaffs2_internal_read_super_mtd, mnt);
}
#else
static struct super_block *yaffs2_read_super(struct file_system_type *fs,
static struct file_system_type yaffs2_fs_type = {
.owner = THIS_MODULE,
.name = "yaffs2",
- .get_sb = yaffs2_read_super,
- .kill_sb = kill_block_super,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+ .mount = yaffs2_mount,
+#else
+ .get_sb = yaffs2_read_super,
+#endif
+ .kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
#else
FS_REQUIRES_DEV);
#endif
-#endif /* CONFIG_YAFFS_YAFFS2 */
static struct proc_dir_entry *my_proc_entry;
-static struct proc_dir_entry *debug_proc_entry;
-
-static char *yaffs_dump_dev_part0(char *buf, yaffs_dev_t * dev)
-{
- buf += sprintf(buf, "start_block.......... %d\n", dev->param.start_block);
- buf += sprintf(buf, "end_block............ %d\n", dev->param.end_block);
- buf += sprintf(buf, "total_bytes_per_chunk %d\n", dev->param.total_bytes_per_chunk);
- buf += sprintf(buf, "use_nand_ecc......... %d\n", dev->param.use_nand_ecc);
- buf += sprintf(buf, "no_tags_ecc.......... %d\n", dev->param.no_tags_ecc);
- buf += sprintf(buf, "is_yaffs2............ %d\n", dev->param.is_yaffs2);
- buf += sprintf(buf, "inband_tags.......... %d\n", dev->param.inband_tags);
- buf += sprintf(buf, "empty_lost_n_found... %d\n", dev->param.empty_lost_n_found);
- buf += sprintf(buf, "disable_lazy_load.... %d\n", dev->param.disable_lazy_load);
- buf += sprintf(buf, "refresh_period....... %d\n", dev->param.refresh_period);
- buf += sprintf(buf, "n_caches............. %d\n", dev->param.n_caches);
- buf += sprintf(buf, "n_reserved_blocks.... %d\n", dev->param.n_reserved_blocks);
- buf += sprintf(buf, "always_check_erased.. %d\n", dev->param.always_check_erased);
+static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev)
+{
+ struct yaffs_param *param = &dev->param;
+ int bs[10];
+
+ yaffs_count_blocks_by_state(dev,bs);
+
+ buf += sprintf(buf, "start_block.......... %d\n", param->start_block);
+ buf += sprintf(buf, "end_block............ %d\n", param->end_block);
+ buf += sprintf(buf, "total_bytes_per_chunk %d\n",
+ param->total_bytes_per_chunk);
+ buf += sprintf(buf, "use_nand_ecc......... %d\n", param->use_nand_ecc);
+ buf += sprintf(buf, "no_tags_ecc.......... %d\n", param->no_tags_ecc);
+ buf += sprintf(buf, "is_yaffs2............ %d\n", param->is_yaffs2);
+ buf += sprintf(buf, "inband_tags.......... %d\n", param->inband_tags);
+ buf += sprintf(buf, "empty_lost_n_found... %d\n",
+ param->empty_lost_n_found);
+ buf += sprintf(buf, "disable_lazy_load.... %d\n",
+ param->disable_lazy_load);
+ buf += sprintf(buf, "disable_bad_block_mrk %d\n",
+ param->disable_bad_block_marking);
+ buf += sprintf(buf, "refresh_period....... %d\n",
+ param->refresh_period);
+ buf += sprintf(buf, "n_caches............. %d\n", param->n_caches);
+ buf += sprintf(buf, "n_reserved_blocks.... %d\n",
+ param->n_reserved_blocks);
+ buf += sprintf(buf, "always_check_erased.. %d\n",
+ param->always_check_erased);
buf += sprintf(buf, "\n");
+ buf += sprintf(buf, "block count by state\n");
+ buf += sprintf(buf, "0:%d 1:%d 2:%d 3:%d 4:%d\n",
+ bs[0], bs[1], bs[2], bs[3], bs[4]);
+ buf += sprintf(buf, "5:%d 6:%d 7:%d 8:%d 9:%d\n",
+ bs[5], bs[6], bs[7], bs[8], bs[9]);
return buf;
}
-
-static char *yaffs_dump_dev_part1(char *buf, yaffs_dev_t * dev)
+static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev)
{
- buf += sprintf(buf, "data_bytes_per_chunk. %d\n", dev->data_bytes_per_chunk);
+ buf += sprintf(buf, "max file size....... %lld\n",
+ (long long) yaffs_max_file_size(dev));
+ buf += sprintf(buf, "data_bytes_per_chunk. %d\n",
+ dev->data_bytes_per_chunk);
buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);
buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size);
buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks);
- buf += sprintf(buf, "blocks_in_checkpt.... %d\n", dev->blocks_in_checkpt);
+ buf += sprintf(buf, "blocks_in_checkpt.... %d\n",
+ dev->blocks_in_checkpt);
buf += sprintf(buf, "\n");
buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes);
buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj);
buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures);
buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies);
buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs);
- buf += sprintf(buf, "passive_gc_count..... %u\n", dev->passive_gc_count);
- buf += sprintf(buf, "oldest_dirty_gc_count %u\n", dev->oldest_dirty_gc_count);
+ buf += sprintf(buf, "passive_gc_count..... %u\n",
+ dev->passive_gc_count);
+ buf += sprintf(buf, "oldest_dirty_gc_count %u\n",
+ dev->oldest_dirty_gc_count);
buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks);
buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs);
- buf += sprintf(buf, "n_retired_writes..... %u\n", dev->n_retired_writes);
- buf += sprintf(buf, "n_retired_blocks..... %u\n", dev->n_retired_blocks);
+ buf += sprintf(buf, "n_retried_writes..... %u\n",
+ dev->n_retried_writes);
+ buf += sprintf(buf, "n_retired_blocks..... %u\n",
+ dev->n_retired_blocks);
buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed);
buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed);
- buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n", dev->n_tags_ecc_fixed);
- buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n", dev->n_tags_ecc_unfixed);
+ buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n",
+ dev->n_tags_ecc_fixed);
+ buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n",
+ dev->n_tags_ecc_unfixed);
buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits);
buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files);
- buf += sprintf(buf, "n_unlinked_files..... %u\n", dev->n_unlinked_files);
+ buf += sprintf(buf, "n_unlinked_files..... %u\n",
+ dev->n_unlinked_files);
buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count);
buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions);
+ buf += sprintf(buf, "tags_used............ %u\n", dev->tags_used);
+ buf += sprintf(buf, "summary_used......... %u\n", dev->summary_used);
return buf;
}
char **start,
off_t offset, int count, int *eof, void *data)
{
- struct ylist_head *item;
+ struct list_head *item;
char *buf = page;
int step = offset;
int n = 0;
/* Print header first */
if (step == 0)
- buf += sprintf(buf, "Multi-version YAFFS built:" __DATE__ " " __TIME__"\n");
+ buf +=
+ sprintf(buf, "Multi-version YAFFS\n");
else if (step == 1)
- buf += sprintf(buf,"\n");
+ buf += sprintf(buf, "\n");
else {
- step-=2;
-
- down(&yaffs_context_lock);
+ step -= 2;
+
+ mutex_lock(&yaffs_context_lock);
/* Locate and print the Nth entry. Order N-squared but N is small. */
- ylist_for_each(item, &yaffs_context_list) {
- struct yaffs_linux_context *dc = ylist_entry(item, struct yaffs_linux_context, context_list);
- yaffs_dev_t *dev = dc->dev;
+ list_for_each(item, &yaffs_context_list) {
+ struct yaffs_linux_context *dc =
+ list_entry(item, struct yaffs_linux_context,
+ context_list);
+ struct yaffs_dev *dev = dc->dev;
if (n < (step & ~1)) {
- n+=2;
+ n += 2;
continue;
}
- if((step & 1)==0){
- buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->param.name);
+ if ((step & 1) == 0) {
+ buf +=
+ sprintf(buf, "\nDevice %d \"%s\"\n", n,
+ dev->param.name);
buf = yaffs_dump_dev_part0(buf, dev);
- } else
+ } else {
buf = yaffs_dump_dev_part1(buf, dev);
-
+ }
+
break;
}
- up(&yaffs_context_lock);
- }
-
- return buf - page < count ? buf - page : count;
-}
-
-static int yaffs_stats_proc_read(char *page,
- char **start,
- off_t offset, int count, int *eof, void *data)
-{
- struct ylist_head *item;
- char *buf = page;
- int n = 0;
-
- down(&yaffs_context_lock);
-
- /* Locate and print the Nth entry. Order N-squared but N is small. */
- ylist_for_each(item, &yaffs_context_list) {
- struct yaffs_linux_context *dc = ylist_entry(item, struct yaffs_linux_context, context_list);
- yaffs_dev_t *dev = dc->dev;
-
- int erased_chunks;
-
- erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block;
-
- buf += sprintf(buf,"%d, %d, %d, %u, %u, %u, %u\n",
- n, dev->n_free_chunks, erased_chunks,
- dev->bg_gcs, dev->oldest_dirty_gc_count,
- dev->n_obj, dev->n_tnodes);
+ mutex_unlock(&yaffs_context_lock);
}
- up(&yaffs_context_lock);
-
return buf - page < count ? buf - page : count;
}
{"os", YAFFS_TRACE_OS},
{"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
{"scan", YAFFS_TRACE_SCAN},
+ {"mount", YAFFS_TRACE_MOUNT},
{"tracing", YAFFS_TRACE_TRACING},
{"sync", YAFFS_TRACE_SYNC},
{"write", YAFFS_TRACE_WRITE},
-
{"verify", YAFFS_TRACE_VERIFY},
{"verify_nand", YAFFS_TRACE_VERIFY_NAND},
{"verify_full", YAFFS_TRACE_VERIFY_FULL},
{"verify_all", YAFFS_TRACE_VERIFY_ALL},
-
{"all", 0xffffffff},
{"none", 0},
{NULL, 0},
#define MAX_MASK_NAME_LENGTH 40
static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
- unsigned long count, void *data)
+ unsigned long count)
{
unsigned rg = 0, mask_bitfield;
char *end;
done = 0;
} else {
for (x = buf + pos, i = 0;
- (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
- i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
+ (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
+ i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
substring[i] = *x;
substring[i] = '\0';
for (i = 0; mask_flags[i].mask_name != NULL; i++) {
- if (strcmp(substring, mask_flags[i].mask_name) == 0) {
+ if (strcmp(substring, mask_flags[i].mask_name)
+ == 0) {
mask_name = mask_flags[i].mask_name;
- mask_bitfield = mask_flags[i].mask_bitfield;
+ mask_bitfield =
+ mask_flags[i].mask_bitfield;
done = 0;
break;
}
char flag;
flag = ((rg & mask_flags[i].mask_bitfield) ==
mask_flags[i].mask_bitfield) ? '+' : '-';
- printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
+ printk(KERN_DEBUG "%c%s\n", flag,
+ mask_flags[i].mask_name);
+ }
+ }
+
+ return count;
+}
+
+/* Debug strings are of the form:
+ * .bnnn print info on block n
+ * .cobjn,chunkn print nand chunk id for objn:chunkn
+ */
+
+static int yaffs_proc_debug_write(struct file *file, const char *buf,
+ unsigned long count)
+{
+
+ char str[100];
+ char *p0;
+ char *p1;
+ long p1_val;
+ long p0_val;
+ char cmd;
+ struct list_head *item;
+
+ memset(str, 0, sizeof(str));
+ memcpy(str, buf, min((size_t)count, sizeof(str) -1));
+
+ cmd = str[1];
+
+ p0 = str + 2;
+
+ p1 = p0;
+
+ while (*p1 && *p1 != ',') {
+ p1++;
+ }
+ *p1 = '\0';
+ p1++;
+
+ p0_val = simple_strtol(p0, NULL, 0);
+ p1_val = simple_strtol(p1, NULL, 0);
+
+
+ mutex_lock(&yaffs_context_lock);
+
+ /* Locate and print the Nth entry. Order N-squared but N is small. */
+ list_for_each(item, &yaffs_context_list) {
+ struct yaffs_linux_context *dc =
+ list_entry(item, struct yaffs_linux_context,
+ context_list);
+ struct yaffs_dev *dev = dc->dev;
+
+ if (cmd == 'b') {
+ struct yaffs_block_info *bi;
+
+ bi = yaffs_get_block_info(dev,p0_val);
+
+ if(bi) {
+ printk("Block %d: state %d, retire %d, use %d, seq %d\n",
+ (int)p0_val, bi->block_state,
+ bi->needs_retiring, bi->pages_in_use,
+ bi->seq_number);
+ }
+ } else if (cmd == 'c') {
+ struct yaffs_obj *obj;
+ int nand_chunk;
+
+ obj = yaffs_find_by_number(dev, p0_val);
+ if (!obj)
+ printk("No obj %d\n", (int)p0_val);
+ else {
+ if(p1_val == 0)
+ nand_chunk = obj->hdr_chunk;
+ else
+ nand_chunk =
+ yaffs_find_chunk_in_file(obj,
+ p1_val, NULL);
+ printk("Nand chunk for %d:%d is %d\n",
+ (int)p0_val, (int)p1_val, nand_chunk);
+ }
}
}
+ mutex_unlock(&yaffs_context_lock);
+
return count;
}
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))
static int yaffs_proc_write(struct file *file, const char *buf,
- unsigned long count, void *data)
+ unsigned long count, void *ppos)
+#else
+static ssize_t yaffs_proc_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+#endif
{
- return yaffs_proc_write_trace_options(file, buf, count, data);
+ if (buf[0] == '.')
+ return yaffs_proc_debug_write(file, buf, count);
+ return yaffs_proc_write_trace_options(file, buf, count);
}
/* Stuff to handle installation of file systems */
{NULL, 0}
};
-static int __init init_yaffs_fs(void)
+
+#ifdef YAFFS_NEW_PROCFS
+static int yaffs_proc_show(struct seq_file *m, void *v)
{
- int error = 0;
- struct file_system_to_install *fsinst;
+ /* FIXME: Unify in a better way? */
+ char buffer[512];
+ char *start;
+ int len;
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs built " __DATE__ " " __TIME__ " Installing. \n")));
+ len = yaffs_proc_read(buffer, &start, 0, sizeof(buffer), NULL, NULL);
+ seq_puts(m, buffer);
+ return 0;
+}
-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
- T(YAFFS_TRACE_ALWAYS,
- (TSTR(" \n\n\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n\n")));
-#endif
+static int yaffs_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, yaffs_proc_show, NULL);
+}
+
+static struct file_operations procfs_ops = {
+ .owner = THIS_MODULE,
+ .open = yaffs_proc_open,
+ .read = seq_read,
+ .write = yaffs_proc_write,
+ .release = single_release,
+};
+static int yaffs_procfs_init(void)
+{
+ /* Install the proc_fs entries */
+ my_proc_entry = proc_create("yaffs",
+ S_IRUGO | S_IFREG,
+ YPROC_ROOT,
+ &procfs_ops);
+ if (my_proc_entry) {
+ return 0;
+ } else {
+ return -ENOMEM;
+ }
+}
+#else
- init_MUTEX(&yaffs_context_lock);
+static int yaffs_procfs_init(void)
+{
/* Install the proc_fs entries */
my_proc_entry = create_proc_entry("yaffs",
- S_IRUGO | S_IFREG,
- YPROC_ROOT);
+ S_IRUGO | S_IFREG, YPROC_ROOT);
if (my_proc_entry) {
my_proc_entry->write_proc = yaffs_proc_write;
my_proc_entry->read_proc = yaffs_proc_read;
my_proc_entry->data = NULL;
- } else
+ return 0;
+ } else {
return -ENOMEM;
+ }
+}
- debug_proc_entry = create_proc_entry("yaffs_stats",
- S_IRUGO | S_IFREG,
- YPROC_ROOT);
+#endif
- if (debug_proc_entry) {
- debug_proc_entry->write_proc = NULL;
- debug_proc_entry->read_proc = yaffs_stats_proc_read;
- debug_proc_entry->data = NULL;
- } else
- return -ENOMEM;
+
+static int __init init_yaffs_fs(void)
+{
+ int error = 0;
+ struct file_system_to_install *fsinst;
+
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs Installing.");
+
+ mutex_init(&yaffs_context_lock);
+
+ error = yaffs_procfs_init();
+ if (error)
+ return error;
/* Now add the file system entries */
struct file_system_to_install *fsinst;
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs built " __DATE__ " " __TIME__ " removing. \n")));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs removing.");
remove_proc_entry("yaffs", YPROC_ROOT);
- remove_proc_entry("yaffs_stats", YPROC_ROOT);
fsinst = fs_to_install;
module_exit(exit_yaffs_fs)
MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
-MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010");
+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2011");
MODULE_LICENSE("GPL");