/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2010 Aleph One Ltd.
+ * Copyright (C) 2002-2011 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
* a single version and should not include any multi-version code.
*/
#include <linux/version.h>
-
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
-#include <linux/smp_lock.h>
#include <linux/pagemap.h>
#include <linux/mtd/mtd.h>
#include <linux/interrupt.h>
#include <linux/kthread.h>
#include <linux/delay.h>
#include <linux/freezer.h>
-
#include <asm/div64.h>
-
#include <linux/statfs.h>
-
-#define UnlockPage(p) unlock_page(p)
-#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
-
-#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
-
-#define YPROC_ROOT NULL
-
-#define Y_INIT_TIMER(a) init_timer_on_stack(a)
-
-#define WRITE_SIZE_STR "writesize"
-#define WRITE_SIZE(mtd) ((mtd)->writesize)
-
-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;
-}
-
#include <linux/uaccess.h>
#include <linux/mtd/mtd.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"
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 */
module_param(yaffs_trace_mask, uint, 0644);
module_param(yaffs_auto_checkpoint, uint, 0644);
module_param(yaffs_gc_control, uint, 0644);
module_param(yaffs_bg_enable, uint, 0644);
+module_param(yaffs_auto_select, uint, 0644);
+
+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
-#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
+static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
+{
+ uint64_t result = partition_size;
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
+ do_div(result, block_size);
+ return (uint32_t) result;
+}
#define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private)
-#define yaffs_inode_to_obj(iptr) ((struct yaffs_obj *)(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)
#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info)
#define update_dir_time(dir) do {\
(dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
- } while(0)
+ } 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);
+static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
+{
+ return yaffs_gc_control;
+}
-static int yaffs_file_flush(struct file *file, fl_owner_t id);
+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);
+}
-static int yaffs_sync_object(struct file *file, int datasync);
+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_readdir(struct file *f, void *dirent, filldir_t filldir);
+static void yaffs_fill_inode_from_obj(struct inode *inode,
+ struct yaffs_obj *obj);
-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);
-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);
+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
+{
+ struct inode *inode;
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t dev);
-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);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
-static int yaffs_sync_fs(struct super_block *sb, int wait);
-static void yaffs_write_super(struct super_block *sb);
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
+ /* 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.
+ */
-#ifdef YAFFS_HAS_PUT_INODE
-static void yaffs_put_inode(struct inode *inode);
-#endif
+ yaffs_gross_lock(dev);
-static void yaffs_evict_inode(struct inode *);
+ obj = yaffs_find_by_number(dev, inode->i_ino);
+ yaffs_fill_inode_from_obj(inode, obj);
-static int yaffs_readpage(struct file *file, struct page *page);
-static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
+ yaffs_gross_unlock(dev);
-#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
+ unlock_new_inode(inode);
+ return inode;
+}
-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);
+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+ struct yaffs_obj *obj)
+{
+ struct inode *inode;
-static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
- int buflen);
-void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+ if (!sb) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_get_inode for NULL super_block!!");
+ return NULL;
-static void yaffs_touch_super(struct yaffs_dev *dev);
+ }
-static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin);
+ if (!obj) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_get_inode for NULL object!!");
+ return NULL;
-static int yaffs_vfs_setattr(struct inode *, struct iattr *);
+ }
-static struct address_space_operations yaffs_file_address_operations = {
- .readpage = yaffs_readpage,
- .writepage = yaffs_writepage,
- .write_begin = yaffs_write_begin,
- .write_end = yaffs_write_end,
-};
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_get_inode for object %d",
+ obj->obj_id);
-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,
-};
+ inode = yaffs_iget(sb, obj->obj_id);
+ if (IS_ERR(inode))
+ return NULL;
-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
-};
+ /* NB Side effect: iget calls back to yaffs_read_inode(). */
+ /* iget also increments the inode's i_count */
+ /* NB You can't be holding gross_lock or deadlock will happen! */
-static const struct inode_operations yaffs_symlink_inode_operations = {
- .readlink = yaffs_readlink,
- .follow_link = yaffs_follow_link,
- .put_link = yaffs_put_link,
- .setattr = yaffs_setattr,
-#ifdef CONFIG_YAFFS_XATTR
- .setxattr = yaffs_setxattr,
- .getxattr = yaffs_getxattr,
- .listxattr = yaffs_listxattr,
- .removexattr = yaffs_removexattr,
-#endif
-};
+ return inode;
+}
-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
-};
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+ dev_t rdev)
+{
+ struct inode *inode;
+ struct yaffs_obj *obj = NULL;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
+ int error;
+ uid_t uid = current->cred->fsuid;
+ gid_t gid =
+ (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid;
-static const struct file_operations yaffs_dir_operations = {
- .read = generic_read_dir,
- .readdir = yaffs_readdir,
- .fsync = yaffs_sync_object,
- .llseek = yaffs_dir_llseek,
-};
+ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+ mode |= S_ISGID;
-static const struct super_operations yaffs_super_ops = {
- .statfs = yaffs_statfs,
-#ifdef YAFFS_HAS_PUT_INODE
- .put_inode = yaffs_put_inode,
-#endif
- .put_super = yaffs_put_super,
- .evict_inode = yaffs_evict_inode,
- .sync_fs = yaffs_sync_fs,
- .write_super = yaffs_write_super,
-};
+ if (!parent) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_mknod: could not get parent object");
+ return -EPERM;
+ }
-static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
-{
- setattr_copy(inode, attr);
- return 0;
-}
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_mknod: parent object %d type %d",
+ parent->obj_id, parent->variant_type);
-static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
-{
- truncate_setsize(inode, newsize);
- return 0;
-}
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_mknod: making oject for %s, mode %x dev %x",
+ dentry->d_name.name, mode, rdev);
-static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
-{
- return yaffs_gc_control;
-}
+ dev = parent->my_dev;
-static void yaffs_gross_lock(struct yaffs_dev *dev)
-{
- T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current));
- mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock));
- T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current));
-}
+ yaffs_gross_lock(dev);
-static void yaffs_gross_unlock(struct yaffs_dev *dev)
-{
- T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current));
- mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
-}
+ if (yaffs_get_n_free_chunks(dev) < 1) {
+ error = -ENOSPC;
+ goto err_out;
+ }
+
+ switch (mode & S_IFMT) {
+ default:
+ /* Special (socket, fifo, device...) */
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special");
+ obj =
+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
+ gid, old_encode_dev(rdev));
+ 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 (!obj) {
+ error = -ENOMEM;
+ goto err_out;
+ }
+
+ /* Can not call yaffs_get_inode() with gross lock held */
+ yaffs_gross_unlock(dev);
+
+
+ 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));
+ yaffs_fill_inode_from_obj(dir, parent);
+ return 0;
+
+err_out:
+ yaffs_gross_unlock(dev);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod error %d", error);
+ return error;
-/* ExportFS support */
-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)
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
- return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
- yaffs2_nfs_get_inode);
+ return yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
}
-static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
- struct fid *fid, int fh_len,
- int fh_type)
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *n)
{
- return generic_fh_to_parent(sb, fid, fh_len, fh_type,
- yaffs2_nfs_get_inode);
+ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
}
-struct dentry *yaffs2_get_parent(struct dentry *dentry)
+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;
- 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;
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_link");
- d_obj = yaffs_inode_to_obj(dentry->d_inode);
+ obj = yaffs_inode_to_obj(inode);
+ dev = obj->my_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 (IS_ERR(inode)) {
- parent = ERR_CAST(inode);
- } else {
- parent = d_obtain_alias(inode);
- if (!IS_ERR(parent)) {
- parent = ERR_PTR(-ENOMEM);
- iput(inode);
- }
- }
- }
- }
-
- return parent;
-}
-
-/* Just declare a zero structure as a NULL value implies
- * using the default functions of exportfs.
- */
-
-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,
-};
-
-/*-----------------------------------------------------------------*/
-/* 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 =
- YMALLOC(sizeof(struct yaffs_search_context));
- 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);
- YFREE(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;
+ yaffs_gross_lock(dev);
- 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 (!S_ISDIR(inode->i_mode)) /* Don't link directories */
+ link =
+ yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
+ obj);
- 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);
+ 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_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);
+ yaffs_gross_unlock(dev);
- /* 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) {
- if (i) {
- sc = list_entry(i, struct yaffs_search_context, others);
- if (sc->next_return == obj)
- yaffs_search_advance(sc);
- }
+ if (link) {
+ update_dir_time(dir);
+ return 0;
}
+ return -EPERM;
}
-/*-----------------------------------------------------------------*/
-
-static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
- int buflen)
+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *symname)
{
- unsigned char *alias;
- int ret;
-
- struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-
- yaffs_gross_lock(dev);
-
- alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
-
- yaffs_gross_unlock(dev);
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
+ struct inode *inode;
+ uid_t uid = current->cred->fsuid;
+ gid_t gid =
+ (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid;
- if (!alias)
- return -ENOMEM;
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
- ret = vfs_readlink(dentry, buffer, buflen, alias);
- kfree(alias);
- return ret;
-}
+ if (strnlen(dentry->d_name.name, YAFFS_MAX_NAME_LENGTH + 1) >
+ YAFFS_MAX_NAME_LENGTH)
+ return -ENAMETOOLONG;
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
- unsigned char *alias;
- void *ret;
- struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
+ 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);
-
- alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
+ 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 (!alias) {
- ret = ERR_PTR(-ENOMEM);
- goto out;
+ if (!obj) {
+ yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
+ return -ENOMEM;
}
- nd_set_link(nd, alias);
- ret = (void *)alias;
-out:
- return ret;
-}
+ 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");
-void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
-{
- kfree(alias);
+ return 0;
}
-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
- struct yaffs_obj *obj);
-
-/*
- * Lookup is used to find objects in the fs
- */
-
static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *n)
{
struct yaffs_obj *obj;
- struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
-
+ struct inode *inode = NULL;
struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
if (current != yaffs_dev_to_lc(dev)->readdir_process)
yaffs_gross_lock(dev);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_lookup for %d:%s\n"),
- yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name));
+ 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);
yaffs_gross_unlock(dev);
if (obj) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_lookup found %d\n"), obj->obj_id));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_lookup found %d", obj->obj_id);
inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
if (inode) {
- T(YAFFS_TRACE_OS, (TSTR("yaffs_loookup dentry \n")));
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_loookup dentry");
d_add(dentry, inode);
/* return dentry; */
return NULL;
}
} else {
- T(YAFFS_TRACE_OS, (TSTR("yaffs_lookup not found\n")));
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
}
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, 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;
-
- /* If the object freeing was deferred, then the real
- * free happens now.
- * This should fix the inode inconsistency problem.
- */
- yaffs_handle_defered_free(obj);
-}
-
-/* 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)
+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
{
- struct yaffs_obj *obj;
+ int ret_val;
struct yaffs_dev *dev;
- int deleteme = 0;
+ struct yaffs_obj *obj;
- obj = yaffs_inode_to_obj(inode);
+ 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;
- 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_gross_lock(dev);
- if (!inode->i_nlink && !is_bad_inode(inode))
- deleteme = 1;
- truncate_inode_pages(&inode->i_data, 0);
- end_writeback(inode);
+ ret_val = yaffs_unlinker(obj, dentry->d_name.name);
- 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);
+ if (ret_val == YAFFS_OK) {
+ inode_dec_link_count(dentry->d_inode);
+ dir->i_version++;
yaffs_gross_unlock(dev);
+ update_dir_time(dir);
+ return 0;
}
-
+ yaffs_gross_unlock(dev);
+ return -ENOTEMPTY;
}
-static int yaffs_file_flush(struct file *file, fl_owner_t id)
+static int yaffs_sync_object(struct file *file,
+ loff_t start, loff_t end, int datasync)
{
- struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
-
- 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"));
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
+ struct dentry *dentry = file->f_path.dentry;
- yaffs_gross_lock(dev);
+ obj = yaffs_dentry_to_obj(dentry);
- yaffs_flush_file(obj, 1, 0);
-
- yaffs_gross_unlock(dev);
+ dev = obj->my_dev;
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, "yaffs_sync_object");
+ yaffs_gross_lock(dev);
+ yaffs_flush_file(obj, 1, datasync);
+ yaffs_gross_unlock(dev);
return 0;
}
-
-static int yaffs_readpage_nolock(struct file *f, struct page *pg)
+/*
+ * 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)
{
- /* Lifted from jffs2 */
-
- struct yaffs_obj *obj;
- unsigned char *pg_buf;
- int ret;
-
struct yaffs_dev *dev;
+ int ret_val = YAFFS_FAIL;
+ struct yaffs_obj *target;
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readpage_nolock at %08x, size %08x\n"),
- (unsigned)(pg->index << PAGE_CACHE_SHIFT),
- (unsigned)PAGE_CACHE_SIZE));
-
- obj = yaffs_dentry_to_obj(f->f_dentry);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
+ dev = yaffs_inode_to_obj(old_dir)->my_dev;
- dev = obj->my_dev;
+ yaffs_gross_lock(dev);
- BUG_ON(!PageLocked(pg));
+ /* 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);
- pg_buf = kmap(pg);
- /* FIXME: Can kmap fail? */
+ if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ !list_empty(&target->variant.dir_variant.children)) {
- yaffs_gross_lock(dev);
+ yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
- ret = yaffs_file_rd(obj, pg_buf,
- pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);
+ 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 >= 0)
- ret = 0;
+ if (ret_val == YAFFS_OK) {
+ if (target)
+ inode_dec_link_count(new_dentry->d_inode);
- if (ret) {
- ClearPageUptodate(pg);
- SetPageError(pg);
+ update_dir_time(old_dir);
+ if (old_dir != new_dir)
+ update_dir_time(new_dir);
+ return 0;
} else {
- SetPageUptodate(pg);
- ClearPageError(pg);
+ return -ENOTEMPTY;
}
-
- 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)
-{
- int ret = yaffs_readpage_nolock(f, pg);
- UnlockPage(pg);
- return ret;
-}
-
-static int yaffs_readpage(struct file *f, struct page *pg)
-{
- int ret;
-
- 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 */
-
-static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
{
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
struct yaffs_dev *dev;
- struct address_space *mapping = page->mapping;
- struct inode *inode;
- unsigned long end_index;
- char *buffer;
- struct yaffs_obj *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);
+ int result;
- end_index = i_size >> PAGE_CACHE_SHIFT;
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_setattr of object %d",
+ yaffs_inode_to_obj(inode)->obj_id);
- if (page->index < end_index)
- n_bytes = PAGE_CACHE_SIZE;
- else {
- n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
+ /* Fail if a requested resize >= 2GB */
+ if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
+ error = -EINVAL;
- 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")));
+ if (!error)
+ error = inode_change_ok(inode, attr);
- zero_user_segment(page, 0, PAGE_CACHE_SIZE);
- set_page_writeback(page);
- unlock_page(page);
- end_page_writeback(page);
- return 0;
+ if (!error) {
+ setattr_copy(inode, attr);
+ yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
+ if (attr->ia_valid & ATTR_SIZE) {
+ truncate_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) {
+ 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 = -EPERM;
+ yaffs_gross_unlock(dev);
}
- if (n_bytes != PAGE_CACHE_SIZE)
- zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
- get_page(page);
+ return error;
+}
- buffer = kmap(page);
+static int yaffs_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ struct inode *inode = dentry->d_inode;
+ int error;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
- 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));
-
- n_written = yaffs_wr_file(obj, buffer,
- page->index << PAGE_CACHE_SHIFT, n_bytes, 0);
-
- yaffs_touch_super(dev);
-
- T(YAFFS_TRACE_OS,
- (TSTR("writepag1: obj = %05x, ino = %05x\n"),
- (int)obj->variant.file_variant.file_size, (int)inode->i_size));
-
+ error = yaffs_set_xattrib(obj, name, value, size, flags);
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;
}
-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 ssize_t yaffs_getxattr(struct dentry *dentry, 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 */
- pg = grab_cache_page_write_begin(mapping, index, flags);
-
- *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));
-
- /* Get fs space */
- space_held = yaffs_hold_space(filp);
-
- if (!space_held) {
- ret = -ENOSPC;
- goto out;
- }
-
- /* Update page if required */
-
- if (!Page_Uptodate(pg))
- ret = yaffs_readpage_nolock(filp, pg);
+ struct inode *inode = dentry->d_inode;
+ int error;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- if (ret)
- goto out;
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_getxattr \"%s\" from object %d",
+ name, obj->obj_id);
- /* Happy path return */
- T(YAFFS_TRACE_OS, (TSTR("end yaffs_write_begin - ok\n")));
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
+ error = yaffs_get_xattrib(obj, name, buff, size);
+ yaffs_gross_unlock(dev);
- return 0;
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
-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;
+ return error;
}
-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_removexattr(struct dentry *dentry, const char *name)
{
- int ret = 0;
- void *addr, *kva;
- uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
-
- kva = kmap(pg);
- addr = kva + offset_into_page;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_write_end addr %p pos %x n_bytes %d\n",
- addr, (unsigned)pos, copied));
+ struct inode *inode = dentry->d_inode;
+ int error;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- ret = yaffs_file_write(filp, addr, copied, &pos);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_removexattr of object %d", obj->obj_id);
- 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 */
- }
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
+ error = yaffs_remove_xattrib(obj, name);
+ yaffs_gross_unlock(dev);
- kunmap(pg);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_removexattr done returning %d", error);
- yaffs_release_space(filp);
- unlock_page(pg);
- page_cache_release(pg);
- return ret;
+ return error;
}
-static void yaffs_fill_inode_from_obj(struct inode *inode,
- struct yaffs_obj *obj)
+static ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size)
{
- 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;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (!S_ISLNK(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFLNK;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- if (!S_ISDIR(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFDIR;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- default:
- /* TODO? */
- break;
- }
-
- inode->i_flags |= S_NOATIME;
-
- inode->i_ino = obj->obj_id;
- inode->i_mode = obj->yst_mode;
- inode->i_uid = obj->yst_uid;
- inode->i_gid = obj->yst_gid;
-
- 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;
- 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);
+ struct inode *inode = dentry->d_inode;
+ int error;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- 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)));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_listxattr of object %d", obj->obj_id);
- switch (obj->yst_mode & S_IFMT) {
- default: /* fifo, device or socket */
- init_special_inode(inode, obj->yst_mode,
- old_decode_dev(obj->yst_rdev));
- 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;
- }
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
+ error = yaffs_list_xattrib(obj, buff, size);
+ yaffs_gross_unlock(dev);
- yaffs_inode_to_obj_lv(inode) = obj;
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_listxattr done returning %d", error);
- obj->my_inode = inode;
+ return error;
+}
- } else {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_fill_inode invalid parameters\n")));
- }
+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,
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .listxattr = yaffs_listxattr,
+ .removexattr = yaffs_removexattr,
+};
+/*-----------------------------------------------------------------*/
+/* 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;
+};
-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
- struct yaffs_obj *obj)
+/*
+ * 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 inode *inode;
+ struct yaffs_dev *dev = dir->my_dev;
+ struct yaffs_search_context *sc =
+ kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
- if (!sb) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_get_inode for NULL super_block!!\n")));
+ if (!sc)
return NULL;
+ 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);
}
+}
- if (!obj) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_get_inode for NULL object!!\n")));
- return NULL;
+/*
+ * 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);
}
+}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_get_inode for object %d\n"), obj->obj_id));
+/*
+ * 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)
+{
- inode = Y_IGET(sb, obj->obj_id);
- if (IS_ERR(inode))
- return NULL;
+ struct list_head *i;
+ struct yaffs_search_context *sc;
+ struct list_head *search_contexts =
+ &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
- /* NB Side effect: iget calls back to yaffs_read_inode(). */
- /* iget also increments the inode's i_count */
- /* NB You can't be holding gross_lock or deadlock will happen! */
+ /* 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);
+ }
- return inode;
}
-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
- loff_t * pos)
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
{
struct yaffs_obj *obj;
- int n_written, ipos;
- struct inode *inode;
struct yaffs_dev *dev;
+ struct yaffs_search_context *sc;
+ struct inode *inode = f->f_dentry->d_inode;
+ unsigned long offset, curoffs;
+ struct yaffs_obj *l;
+ int ret_val = 0;
+ char name[YAFFS_MAX_NAME_LENGTH + 1];
obj = yaffs_dentry_to_obj(f->f_dentry);
-
dev = obj->my_dev;
yaffs_gross_lock(dev);
- inode = f->f_dentry->d_inode;
+ yaffs_dev_to_lc(dev)->readdir_process = current;
- if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
- ipos = inode->i_size;
- else
- ipos = *pos;
+ offset = f->f_pos;
- 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));
+ sc = yaffs_new_search(obj);
+ if (!sc) {
+ ret_val = -ENOMEM;
+ goto out;
+ }
- n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readdir: starting at %d", (int)offset);
- yaffs_touch_super(dev);
+ if (offset == 0) {
+ 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) {
+ yaffs_gross_lock(dev);
+ goto out;
+ }
+ yaffs_gross_lock(dev);
+ offset++;
+ f->f_pos++;
+ }
+ if (offset == 1) {
+ 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) {
+ yaffs_gross_lock(dev);
+ goto out;
+ }
+ yaffs_gross_lock(dev);
+ offset++;
+ f->f_pos++;
+ }
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_file_write: %d(%x) bytes written\n"),
- (unsigned)n, (unsigned)n));
+ curoffs = 1;
- 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 the directory has changed since the open or last call to
+ readdir, rewind to after the 2 canned entries. */
+ if (f->f_version != inode->i_version) {
+ offset = 2;
+ f->f_pos = offset;
+ f->f_version = inode->i_version;
+ }
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_file_write size updated to %d bytes, "
- "%d blocks\n"), ipos, (int)(inode->i_blocks)));
- }
+ while (sc->next_return) {
+ curoffs++;
+ l = sc->next_return;
+ if (curoffs >= offset) {
+ 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 (filldir(dirent,
+ name,
+ strlen(name),
+ offset, this_inode, this_type) < 0) {
+ yaffs_gross_lock(dev);
+ goto out;
+ }
+ yaffs_gross_lock(dev);
+
+ offset++;
+ f->f_pos++;
+ }
+ yaffs_search_advance(sc);
}
+
+out:
+ yaffs_search_end(sc);
+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
yaffs_gross_unlock(dev);
- return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
+
+ return ret_val;
}
-/* 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 const struct file_operations yaffs_dir_operations = {
+ .read = generic_read_dir,
+ .readdir = yaffs_readdir,
+ .fsync = yaffs_sync_object,
+ .llseek = generic_file_llseek,
+};
-static ssize_t yaffs_hold_space(struct file *f)
-{
- struct yaffs_obj *obj;
- struct yaffs_dev *dev;
- int n_free_chunks;
- obj = yaffs_dentry_to_obj(f->f_dentry);
+static int yaffs_file_flush(struct file *file, fl_owner_t id)
+{
+ struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
+ struct yaffs_dev *dev = obj->my_dev;
- dev = obj->my_dev;
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_flush object %d (%s)",
+ obj->obj_id, obj->dirty ? "dirty" : "clean");
yaffs_gross_lock(dev);
- n_free_chunks = yaffs_get_n_free_chunks(dev);
+ yaffs_flush_file(obj, 1, 0);
yaffs_gross_unlock(dev);
- return (n_free_chunks > 20) ? 1 : 0;
+ return 0;
}
-static void yaffs_release_space(struct file *f)
+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,
+};
+
+
+/* ExportFS support */
+static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
+ uint32_t generation)
{
- struct yaffs_obj *obj;
- struct yaffs_dev *dev;
+ return yaffs_iget(sb, ino);
+}
- obj = yaffs_dentry_to_obj(f->f_dentry);
+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);
+}
- dev = obj->my_dev;
+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)
+{
+
+ 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;
+
+ d_obj = yaffs_inode_to_obj(dentry->d_inode);
+
+ if (d_obj) {
+ parent_obj = d_obj->parent;
+ if (parent_obj) {
+ parent_ino = yaffs_get_obj_inode(parent_obj);
+ inode = yaffs_iget(sb, parent_ino);
+
+ if (IS_ERR(inode)) {
+ parent = ERR_CAST(inode);
+ } else {
+ parent = d_obtain_alias(inode);
+ if (!IS_ERR(parent)) {
+ parent = ERR_PTR(-ENOMEM);
+ iput(inode);
+ }
+ }
+ }
+ }
+ return parent;
+}
+
+/* Just declare a zero structure as a NULL value implies
+ * using the default functions of exportfs.
+ */
+
+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,
+};
+
+
+/*-----------------------------------------------------------------*/
+
+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
+ int buflen)
+{
+ unsigned char *alias;
+ int ret;
+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
yaffs_gross_lock(dev);
- yaffs_gross_unlock(dev);
-}
-
-static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin)
-{
- long long retval;
-
- lock_kernel();
+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
- switch (origin) {
- case 2:
- offset += i_size_read(file->f_path.dentry->d_inode);
- break;
- case 1:
- offset += file->f_pos;
- }
- retval = -EINVAL;
+ yaffs_gross_unlock(dev);
- if (offset >= 0) {
- if (offset != file->f_pos)
- file->f_pos = offset;
+ if (!alias)
+ return -ENOMEM;
- retval = offset;
- }
- unlock_kernel();
- return retval;
+ ret = vfs_readlink(dentry, buffer, buflen, alias);
+ kfree(alias);
+ return ret;
}
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
{
- struct yaffs_obj *obj;
- struct yaffs_dev *dev;
- struct yaffs_search_context *sc;
- struct inode *inode = f->f_dentry->d_inode;
- unsigned long offset, curoffs;
- struct yaffs_obj *l;
- int ret_val = 0;
-
- char name[YAFFS_MAX_NAME_LENGTH + 1];
-
- obj = yaffs_dentry_to_obj(f->f_dentry);
- dev = obj->my_dev;
+ unsigned char *alias;
+ void *ret;
+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
yaffs_gross_lock(dev);
- yaffs_dev_to_lc(dev)->readdir_process = current;
-
- offset = f->f_pos;
+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
+ yaffs_gross_unlock(dev);
- sc = yaffs_new_search(obj);
- if (!sc) {
- ret_val = -ENOMEM;
+ if (!alias) {
+ ret = ERR_PTR(-ENOMEM);
goto out;
}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readdir: starting at %d\n"), (int)offset));
+ nd_set_link(nd, alias);
+ ret = (void *)alias;
+out:
+ return ret;
+}
- if (offset == 0) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readdir: entry . ino %d \n"),
- (int)inode->i_ino));
- yaffs_gross_unlock(dev);
- if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
- yaffs_gross_lock(dev);
- goto out;
- }
- yaffs_gross_lock(dev);
- offset++;
- 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_gross_unlock(dev);
- if (filldir(dirent, "..", 2, offset,
- f->f_dentry->d_parent->d_inode->i_ino,
- DT_DIR) < 0) {
- yaffs_gross_lock(dev);
- goto out;
- }
- yaffs_gross_lock(dev);
- offset++;
- f->f_pos++;
- }
+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
+{
+ kfree(alias);
+}
- curoffs = 1;
- /* If the directory has changed since the open or last call to
- readdir, rewind to after the 2 canned entries. */
- if (f->f_version != inode->i_version) {
- offset = 2;
- f->f_pos = offset;
- f->f_version = inode->i_version;
- }
+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;
- while (sc->next_return) {
- curoffs++;
- l = sc->next_return;
- if (curoffs >= offset) {
- int this_inode = yaffs_get_obj_inode(l);
- int this_type = yaffs_get_obj_type(l);
+ /* If the object freeing was deferred, then the real
+ * free happens now.
+ * This should fix the inode inconsistency problem.
+ */
+ yaffs_handle_defered_free(obj);
+}
- 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_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 yaffs_obj *obj;
+ struct yaffs_dev *dev;
+ int deleteme = 0;
- yaffs_gross_unlock(dev);
+ obj = yaffs_inode_to_obj(inode);
- if (filldir(dirent,
- name,
- strlen(name),
- offset, this_inode, this_type) < 0) {
- yaffs_gross_lock(dev);
- goto out;
- }
+ 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");
- yaffs_gross_lock(dev);
+ if (!inode->i_nlink && !is_bad_inode(inode))
+ deleteme = 1;
+ truncate_inode_pages(&inode->i_data, 0);
+ end_writeback(inode);
- offset++;
- f->f_pos++;
- }
- yaffs_search_advance(sc);
+ 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);
}
-out:
- yaffs_search_end(sc);
- yaffs_dev_to_lc(dev)->readdir_process = NULL;
- yaffs_gross_unlock(dev);
-
- return ret_val;
}
-/*
- * File creation. Allocate an inode, and we're done..
- */
+static void yaffs_touch_super(struct yaffs_dev *dev)
+{
+ struct super_block *sb = yaffs_dev_to_lc(dev)->super;
-#define YCRED(x) (x->cred)
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_touch_super() sb = %p", sb);
+ if (sb)
+ sb->s_dirt = 1;
+}
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t rdev)
+static int yaffs_readpage_nolock(struct file *f, struct page *pg)
{
- struct inode *inode;
+ /* Lifted from jffs2 */
- struct yaffs_obj *obj = NULL;
+ struct yaffs_obj *obj;
+ unsigned char *pg_buf;
+ int ret;
struct yaffs_dev *dev;
+ loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
- struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readpage_nolock at %lld, size %08x",
+ (long long)pos,
+ (unsigned)PAGE_CACHE_SIZE);
- int error = -ENOSPC;
- uid_t uid = YCRED(current)->fsuid;
- gid_t gid =
- (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
- if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
- mode |= S_ISGID;
+ obj = yaffs_dentry_to_obj(f->f_dentry);
- 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;
- }
+ dev = obj->my_dev;
- T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making oject for %s, "
- "mode %x dev %x\n"),
- dentry->d_name.name, mode, rdev));
+ BUG_ON(!PageLocked(pg));
- dev = parent->my_dev;
+ pg_buf = kmap(pg);
+ /* FIXME: Can kmap fail? */
yaffs_gross_lock(dev);
- switch (mode & S_IFMT) {
- default:
- /* Special (socket, fifo, device...) */
- T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making special\n")));
- obj =
- yaffs_create_special(parent, dentry->d_name.name, mode, uid,
- gid, old_encode_dev(rdev));
- 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;
- }
+ ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
- /* Can not call yaffs_get_inode() with gross lock held */
yaffs_gross_unlock(dev);
- 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);
+ if (ret >= 0)
+ ret = 0;
+
+ if (ret) {
+ ClearPageUptodate(pg);
+ SetPageError(pg);
} else {
- T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod failed making object\n")));
- error = -ENOMEM;
+ SetPageUptodate(pg);
+ ClearPageError(pg);
}
- return error;
+ flush_dcache_page(pg);
+ kunmap(pg);
+
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done");
+ return ret;
}
-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
{
- int ret_val;
- T(YAFFS_TRACE_OS, (TSTR("yaffs_mkdir\n")));
- ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
- return ret_val;
+ int ret = yaffs_readpage_nolock(f, pg);
+
+ unlock_page(pg);
+ return ret;
}
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *n)
+static int yaffs_readpage(struct file *f, struct page *pg)
{
- T(YAFFS_TRACE_OS, (TSTR("yaffs_create\n")));
- return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+ int ret;
+
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage");
+ ret = yaffs_readpage_unlock(f, pg);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done");
+ return ret;
}
-static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
-{
- int ret_val;
+/* writepage inspired by/stolen from smbfs */
+static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+{
struct yaffs_dev *dev;
+ struct address_space *mapping = page->mapping;
+ struct inode *inode;
+ unsigned long end_index;
+ char *buffer;
struct yaffs_obj *obj;
+ int n_written = 0;
+ unsigned n_bytes;
+ loff_t i_size;
- 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 (!mapping)
+ BUG();
+ inode = mapping->host;
+ if (!inode)
+ BUG();
+ i_size = i_size_read(inode);
- yaffs_gross_lock(dev);
+ end_index = i_size >> PAGE_CACHE_SHIFT;
+
+ if (page->index < end_index)
+ n_bytes = PAGE_CACHE_SIZE;
+ else {
+ n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
- ret_val = yaffs_unlinker(obj, dentry->d_name.name);
+ if (page->index > end_index || !n_bytes) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_writepage at %08x, inode size = %08x!!!",
+ (unsigned)(page->index << PAGE_CACHE_SHIFT),
+ (unsigned)inode->i_size);
+ yaffs_trace(YAFFS_TRACE_OS,
+ " -> don't care!!");
- 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;
+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+ set_page_writeback(page);
+ unlock_page(page);
+ end_page_writeback(page);
+ return 0;
+ }
}
- yaffs_gross_unlock(dev);
- return -ENOTEMPTY;
-}
-/*
- * Create a link...
- */
-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry)
-{
- struct inode *inode = old_dentry->d_inode;
- struct yaffs_obj *obj = NULL;
- struct yaffs_obj *link = NULL;
- struct yaffs_dev *dev;
+ if (n_bytes != PAGE_CACHE_SIZE)
+ zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE);
+
+ get_page(page);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_link\n")));
+ buffer = kmap(page);
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);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_writepage at %08x, size %08x",
+ (unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "writepag0: obj = %05x, ino = %05x",
+ (int)obj->variant.file_variant.file_size, (int)inode->i_size);
- 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)));
- }
+ n_written = yaffs_wr_file(obj, buffer,
+ ((loff_t)page->index) << PAGE_CACHE_SHIFT,
+ n_bytes, 0);
+
+ yaffs_touch_super(dev);
+
+ yaffs_trace(YAFFS_TRACE_OS,
+ "writepag1: obj = %05x, ino = %05x",
+ (int)obj->variant.file_variant.file_size, (int)inode->i_size);
yaffs_gross_unlock(dev);
- if (link) {
- update_dir_time(dir);
- return 0;
- }
+ kunmap(page);
+ set_page_writeback(page);
+ unlock_page(page);
+ end_page_writeback(page);
+ put_page(page);
- return -EPERM;
+ return (n_written == n_bytes) ? 0 : -ENOSPC;
}
-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname)
+/* 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;
- uid_t uid = YCRED(current)->fsuid;
- gid_t gid =
- (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+ int n_free_chunks;
- T(YAFFS_TRACE_OS, (TSTR("yaffs_symlink\n")));
+ obj = yaffs_dentry_to_obj(f->f_dentry);
+
+ dev = obj->my_dev;
- 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;
+ n_free_chunks = yaffs_get_n_free_chunks(dev);
- 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_gross_unlock(dev);
- return -ENOMEM;
+ return (n_free_chunks > 20) ? 1 : 0;
}
-static int yaffs_sync_object(struct file *file, int datasync)
+static void yaffs_release_space(struct file *f)
{
-
struct yaffs_obj *obj;
struct yaffs_dev *dev;
- struct dentry *dentry = file->f_path.dentry;
- obj = yaffs_dentry_to_obj(dentry);
+ obj = yaffs_dentry_to_obj(f->f_dentry);
dev = obj->my_dev;
- 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;
}
-/*
- * 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 int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
{
- struct yaffs_dev *dev;
- int ret_val = YAFFS_FAIL;
- struct yaffs_obj *target;
-
- T(YAFFS_TRACE_OS, (TSTR("yaffs_rename\n")));
- 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)) {
-
- T(YAFFS_TRACE_OS, (TSTR("target is non-empty dir\n")));
+ struct page *pg = NULL;
+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+ int ret = 0;
+ int space_held = 0;
- ret_val = YAFFS_FAIL;
- } else {
- /* Now does unlinking internally using shadowing mechanism */
- T(YAFFS_TRACE_OS, (TSTR("calling yaffs_rename_obj\n")));
+ /* Get a page */
+ pg = grab_cache_page_write_begin(mapping, index, flags);
- 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);
+ *pagep = pg;
+ if (!pg) {
+ ret = -ENOMEM;
+ goto out;
}
- yaffs_gross_unlock(dev);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "start yaffs_write_begin index %d(%x) uptodate %d",
+ (int)index, (int)index, PageUptodate(pg) ? 1 : 0);
- if (ret_val == YAFFS_OK) {
- if (target) {
- new_dentry->d_inode->i_nlink--;
- mark_inode_dirty(new_dentry->d_inode);
- }
+ /* Get fs space */
+ space_held = yaffs_hold_space(filp);
- update_dir_time(old_dir);
- if (old_dir != new_dir)
- update_dir_time(new_dir);
- return 0;
- } else {
- return -ENOTEMPTY;
+ if (!space_held) {
+ ret = -ENOSPC;
+ goto out;
}
-}
-
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
-{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- struct yaffs_dev *dev;
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_setattr of object %d\n"),
- yaffs_inode_to_obj(inode)->obj_id));
+ /* Update page if required */
- /* Fail if a requested resize >= 2GB */
- if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
- error = -EINVAL;
+ if (!PageUptodate(pg))
+ ret = yaffs_readpage_nolock(filp, pg);
- 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);
+ if (ret)
+ goto out;
- }
+ /* Happy path return */
+ yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok");
- T(YAFFS_TRACE_OS, (TSTR("yaffs_setattr done returning %d\n"), error));
+ return 0;
- return error;
+out:
+ 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;
}
-#ifdef CONFIG_YAFFS_XATTR
-int yaffs_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+ loff_t *pos)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
+ struct yaffs_obj *obj;
+ int n_written, ipos;
+ struct inode *inode;
struct yaffs_dev *dev;
- struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_setxattr of object %d\n"), obj->obj_id));
-
- 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);
+ obj = yaffs_dentry_to_obj(f->f_dentry);
+ if (!obj) {
+ /* This should not happen */
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write: hey obj is null!");
+ return -EINVAL;
}
- T(YAFFS_TRACE_OS, (TSTR("yaffs_setxattr done returning %d\n"), error));
- return error;
-}
+ dev = obj->my_dev;
-ssize_t yaffs_getxattr(struct dentry * dentry, const char *name, void *buff,
- size_t size)
-{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- struct yaffs_dev *dev;
- struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+ yaffs_gross_lock(dev);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_getxattr \"%s\" from object %d\n"), name, obj->obj_id));
+ inode = f->f_dentry->d_inode;
- if (error == 0) {
- dev = obj->my_dev;
- yaffs_gross_lock(dev);
- error = yaffs_get_xattrib(obj, name, buff, size);
- yaffs_gross_unlock(dev);
+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
+ ipos = inode->i_size;
+ else
+ ipos = *pos;
- }
- T(YAFFS_TRACE_OS, (TSTR("yaffs_getxattr done returning %d\n"), error));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write about to write writing %u(%x) bytes to object %d at %d(%x)",
+ (unsigned)n, (unsigned)n, obj->obj_id, ipos, ipos);
- return error;
-}
+ n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
-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);
+ yaffs_touch_super(dev);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_removexattr of object %d\n"), obj->obj_id));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write: %d(%x) bytes written",
+ (unsigned)n, (unsigned)n);
- 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);
+ 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 %d bytes, %d blocks",
+ ipos, (int)(inode->i_blocks));
+ }
}
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_removexattr done returning %d\n"), error));
-
- return error;
+ yaffs_gross_unlock(dev);
+ return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
}
-ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *pg, void *fsdadata)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- struct yaffs_dev *dev;
- struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+ int ret = 0;
+ void *addr, *kva;
+ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_listxattr of object %d\n"), obj->obj_id));
+ kva = kmap(pg);
+ addr = kva + offset_into_page;
- 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_write_end addr %p pos %x n_bytes %d",
+ addr, (unsigned)pos, copied);
+
+ ret = yaffs_file_write(filp, addr, copied, &pos);
+ if (ret != copied) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_write_end not same size ret %d copied %d",
+ ret, copied);
+ SetPageError(pg);
}
- T(YAFFS_TRACE_OS, (TSTR("yaffs_listxattr done returning %d\n"), error));
- return error;
+ kunmap(pg);
+
+ yaffs_release_space(filp);
+ unlock_page(pg);
+ page_cache_release(pg);
+ return ret;
}
-#endif
-
static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
struct super_block *sb = dentry->d_sb;
- T(YAFFS_TRACE_OS, (TSTR("yaffs_statfs\n")));
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs");
yaffs_gross_lock(dev);
bytes_in_dev =
((uint64_t)
- ((dev->param.end_block - dev->param.start_block +
- 1))) * ((uint64_t) (dev->param.chunks_per_block *
+ ((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))) *
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_trace(YAFFS_TRACE_OS,
+ "flushing obj %d", obj->obj_id);
yaffs_flush_file(obj, 1, 0);
}
}
static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
{
struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+
if (!dev)
return;
unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
int do_checkpoint;
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs_do_sync_fs: gc-urgency %d %s %s%s\n"),
- gc_urgent,
- sb->s_dirt ? "dirty" : "clean",
- request_checkpoint ? "checkpoint requested" : "no checkpoint",
- oneshot_checkpoint ? " one-shot" : ""));
+ 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",
+ request_checkpoint ? "checkpoint requested" : "no checkpoint",
+ oneshot_checkpoint ? " one-shot" : "");
yaffs_gross_lock(dev);
do_checkpoint = ((request_checkpoint && !gc_urgent) ||
* yaffs_bg_start() launches the background thread.
* yaffs_bg_stop() cleans up the background thread.
*
- * NB:
+ * 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.
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));
+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
+ "yaffs_background starting for dev %p", (void *)dev);
set_freezable();
while (context->bg_running) {
- T(YAFFS_TRACE_BACKGROUND, (TSTR("yaffs_background\n")));
+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
if (kthread_should_stop())
break;
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(expires, now))
expires = now + HZ;
- Y_INIT_TIMER(&timer);
+ init_timer_on_stack(&timer);
timer.expires = expires + 1;
timer.data = (unsigned long)current;
timer.function = yaffs_background_waker;
{
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_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
+ "yaffs_write_super%s",
+ request_checkpoint ? " checkpt" : "");
yaffs_do_sync_fs(sb, request_checkpoint);
{
unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
- (TSTR("yaffs_sync_fs%s\n"), request_checkpoint ? " checkpt" : ""));
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
+ "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : "");
yaffs_do_sync_fs(sb, request_checkpoint);
return 0;
}
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-{
- struct inode *inode;
- struct yaffs_obj *obj;
- struct yaffs_dev *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;
-}
-
static LIST_HEAD(yaffs_context_list);
struct mutex yaffs_context_lock;
-static void yaffs_put_super(struct super_block *sb)
-{
- struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-
- T(YAFFS_TRACE_OS, (TSTR("yaffs_put_super\n")));
-
- 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_gross_lock(dev);
-
- yaffs_flush_super(sb, 1);
-
- if (yaffs_dev_to_lc(dev)->put_super_fn)
- yaffs_dev_to_lc(dev)->put_super_fn(sb);
-
- yaffs_deinitialise(dev);
-
- yaffs_gross_unlock(dev);
- mutex_lock(&yaffs_context_lock);
- list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
- mutex_unlock(&yaffs_context_lock);
-
- if (yaffs_dev_to_lc(dev)->spare_buffer) {
- YFREE(yaffs_dev_to_lc(dev)->spare_buffer);
- yaffs_dev_to_lc(dev)->spare_buffer = NULL;
- }
-
- kfree(dev);
-}
-
-static void yaffs_mtd_put_super(struct super_block *sb)
-{
- struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_super_to_dev(sb));
-
- if (mtd->sync)
- mtd->sync(mtd);
-
- put_mtd_device(mtd);
-}
-
-static void yaffs_touch_super(struct yaffs_dev *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;
-}
-
struct yaffs_options {
int inband_tags;
int skip_checkpoint_read;
#define MAX_OPT_LEN 30
static int yaffs_parse_options(struct yaffs_options *options,
- const char *options_str)
+ const char *options_str)
{
char cur_opt[MAX_OPT_LEN + 1];
int p;
error = 1;
}
}
-
return error;
}
+static const struct address_space_operations yaffs_file_address_operations = {
+ .readpage = yaffs_readpage,
+ .writepage = yaffs_writepage,
+ .write_begin = yaffs_write_begin,
+ .write_end = yaffs_write_end,
+};
+
+
+
+static const struct inode_operations yaffs_file_inode_operations = {
+ .setattr = yaffs_setattr,
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .listxattr = yaffs_listxattr,
+ .removexattr = yaffs_removexattr,
+};
+
+static const struct inode_operations yaffs_symlink_inode_operations = {
+ .readlink = yaffs_readlink,
+ .follow_link = yaffs_follow_link,
+ .put_link = yaffs_put_link,
+ .setattr = yaffs_setattr,
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .listxattr = yaffs_listxattr,
+ .removexattr = yaffs_removexattr,
+};
+
+static void yaffs_fill_inode_from_obj(struct inode *inode,
+ struct yaffs_obj *obj)
+{
+ u32 mode;
+
+ if (!inode || !obj) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_fill_inode invalid parameters");
+ return;
+ }
+
+ /* Check mode against the variant type
+ * and attempt to repair if broken. */
+ 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;
+ }
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ if (!S_ISLNK(mode)) {
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFLNK;
+ }
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ if (!S_ISDIR(mode)) {
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFDIR;
+ }
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ default:
+ /* TODO? */
+ break;
+ }
+
+ inode->i_flags |= S_NOATIME;
+ inode->i_ino = obj->obj_id;
+ inode->i_mode = obj->yst_mode;
+ inode->i_uid = obj->yst_uid;
+ inode->i_gid = obj->yst_gid;
+
+ 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;
+ inode->i_size = yaffs_get_obj_length(obj);
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+ set_nlink(inode, yaffs_get_obj_link_count(obj));
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_fill_inode mode %x uid %d gid %d size %d count %d",
+ inode->i_mode, inode->i_uid, inode->i_gid,
+ (int)inode->i_size, atomic_read(&inode->i_count));
+
+ switch (obj->yst_mode & S_IFMT) {
+ default: /* fifo, device or socket */
+ init_special_inode(inode, obj->yst_mode,
+ old_decode_dev(obj->yst_rdev));
+ 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_inode_to_obj_lv(inode) = obj;
+ obj->my_inode = inode;
+}
+
+static void yaffs_put_super(struct super_block *sb)
+{
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+
+ yaffs_trace(YAFFS_TRACE_OS, "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");
+
+ yaffs_gross_lock(dev);
+
+ yaffs_flush_super(sb, 1);
+
+ if (yaffs_dev_to_lc(dev)->put_super_fn)
+ yaffs_dev_to_lc(dev)->put_super_fn(sb);
+
+ yaffs_deinitialise(dev);
+
+ yaffs_gross_unlock(dev);
+ mutex_lock(&yaffs_context_lock);
+ list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
+ mutex_unlock(&yaffs_context_lock);
+
+ if (yaffs_dev_to_lc(dev)->spare_buffer) {
+ kfree(yaffs_dev_to_lc(dev)->spare_buffer);
+ yaffs_dev_to_lc(dev)->spare_buffer = NULL;
+ }
+
+ kfree(dev);
+
+
+
+ if (mtd && mtd->sync)
+ mtd->sync(mtd);
+
+ if (mtd)
+ put_mtd_device(mtd);
+}
+
+static const struct super_operations yaffs_super_ops = {
+ .statfs = yaffs_statfs,
+ .put_super = yaffs_put_super,
+ .evict_inode = yaffs_evict_inode,
+ .sync_fs = yaffs_sync_fs,
+ .write_super = yaffs_write_super,
+};
+
static struct super_block *yaffs_internal_read_super(int yaffs_version,
struct super_block *sb,
void *data, int silent)
char *data_str = (char *)data;
struct yaffs_linux_context *context = NULL;
struct yaffs_param *param;
-
int read_only = 0;
-
struct yaffs_options options;
-
unsigned mount_id;
int found;
struct yaffs_linux_context *context_iterator;
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;
sb->s_export_op = &yaffs_export_ops;
- 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");
memset(&options, 0, sizeof(options));
- if (yaffs_parse_options(&options, data_str)) {
+ if (yaffs_parse_options(&options, data_str))
/* Option parsing failed */
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)));
+ 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));
- 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_ALWAYS,
+ "Attempting MTD mount of %u.%u,\"%s\"",
+ MAJOR(sb->s_dev), MINOR(sb->s_dev),
+ yaffs_devname(sb, devname_buf));
/* Check it's an mtd device..... */
if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
/* 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)));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "MTD device #%u doesn't appear to exist",
+ 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));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "MTD device is not NAND it's type %d",
+ mtd->type);
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));
- T(YAFFS_TRACE_OS, (TSTR(" size %lld\n"), mtd->size));
-
-#ifdef CONFIG_YAFFS_AUTO_YAFFS2
-
- if (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: auto selecting yaffs2\n")));
+ yaffs_trace(YAFFS_TRACE_OS, " erase %p", mtd->erase);
+ yaffs_trace(YAFFS_TRACE_OS, " read %p", mtd->read);
+ yaffs_trace(YAFFS_TRACE_OS, " write %p", mtd->write);
+ yaffs_trace(YAFFS_TRACE_OS, " readoob %p", mtd->read_oob);
+ yaffs_trace(YAFFS_TRACE_OS, " writeoob %p", mtd->write_oob);
+ yaffs_trace(YAFFS_TRACE_OS, " block_isbad %p", mtd->block_isbad);
+ yaffs_trace(YAFFS_TRACE_OS, " block_markbad %p", mtd->block_markbad);
+ yaffs_trace(YAFFS_TRACE_OS, " writesize %d", mtd->writesize);
+ yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
+ yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
+ yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
+
+ if (yaffs_auto_select && yaffs_version == 1 && mtd->writesize >= 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_auto_select && yaffs_version == 2 && !options.inband_tags &&
+ mtd->writesize == 512) {
+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1");
yaffs_version = 1;
}
-#endif
if (yaffs_version == 2) {
/* Check for version 2 style functions */
!mtd->block_markbad ||
!mtd->read ||
!mtd->write || !mtd->read_oob || !mtd->write_oob) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: MTD device does not support required "
- "functions\n")));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "MTD device does not support required functions");
return NULL;
}
- if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+ if ((mtd->writesize < 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")));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "MTD device does not have the right page sizes");
return NULL;
}
} else {
if (!mtd->erase ||
!mtd->read ||
!mtd->write || !mtd->read_oob || !mtd->write_oob) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: MTD device does not support required "
- "functions\n")));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "MTD device does not support required functions");
return NULL;
}
- if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
+ if (mtd->writesize < 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")));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "MTD device does not support have the right page sizes");
return NULL;
}
}
context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL);
if (!dev || !context) {
- if (dev)
- kfree(dev);
- if (context)
- kfree(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 "
- "struct yaffs_dev. \n")));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs_read_super failed trying to allocate yaffs_dev");
return NULL;
}
memset(dev, 0, sizeof(struct yaffs_dev));
param->n_caches = (options.no_cache) ? 0 : 10;
param->inband_tags = options.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)
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)
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
-
-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
- param->always_check_erased = 1;
-#endif
if (options.empty_lost_and_found_overridden)
param->empty_lost_n_found = options.empty_lost_and_found;
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);
+ yaffs_dev_to_lc(dev)->spare_buffer =
+ kmalloc(mtd->oobsize, GFP_NOFS);
param->is_yaffs2 = 1;
param->total_bytes_per_chunk = mtd->writesize;
param->chunks_per_block = mtd->erasesize / mtd->writesize;
yaffs_dev_to_lc(dev)->put_super_fn = yaffs_mtd_put_super;
param->sb_dirty_fn = yaffs_touch_super;
- param->gc_control = yaffs_gc_control_callback;
+ param->gc_control_fn = yaffs_gc_control_callback;
yaffs_dev_to_lc(dev)->super = sb;
-#ifndef CONFIG_YAFFS_DOES_ECC
param->use_nand_ecc = 1;
-#endif
param->skip_checkpt_rd = options.skip_checkpoint_read;
param->skip_checkpt_wr = options.skip_checkpoint_write;
mutex_lock(&yaffs_context_lock);
/* Get a mount id */
- found = 0;
- for (mount_id = 0; !found; mount_id++) {
+ for (mount_id = 0, found = 0; !found; mount_id++) {
found = 1;
list_for_each(l, &yaffs_context_list) {
context_iterator =
- list_entry(l, struct yaffs_linux_context,
- context_list);
+ list_entry(l, struct yaffs_linux_context,
+ context_list);
if (context_iterator->mount_id == mount_id)
found = 0;
}
err = yaffs_guts_initialise(dev);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_read_super: guts initialised %s\n"),
- (err == YAFFS_OK) ? "OK" : "FAILED"));
+ 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)
param->defered_dir_update = 0;
+ sb->s_maxbytes = yaffs_max_file_size(dev);
+
/* Release lock before yaffs_get_inode() */
yaffs_gross_unlock(dev);
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);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: d_alloc_root done\n")));
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: d_alloc_root done");
if (!root) {
iput(inode);
}
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));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs_read_super: is_checkpointed %d",
+ dev->is_checkpointed);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: done\n")));
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done");
return sb;
}
return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
}
-static int yaffs_read_super(struct file_system_type *fs,
+static struct dentry *yaffs_mount(struct file_system_type *fs,
int flags, const char *dev_name,
- void *data, struct vfsmount *mnt)
+ void *data)
{
-
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs_internal_read_super_mtd, mnt);
+ return mount_bdev(fs, flags, dev_name, data,
+ yaffs_internal_read_super_mtd);
}
static struct file_system_type yaffs_fs_type = {
.owner = THIS_MODULE,
.name = "yaffs",
- .get_sb = yaffs_read_super,
+ .mount = yaffs_mount,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
-#ifdef CONFIG_YAFFS_YAFFS2
-
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;
}
-static int yaffs2_read_super(struct file_system_type *fs,
- int flags, const char *dev_name, void *data,
- struct vfsmount *mnt)
+static struct dentry *yaffs2_mount(struct file_system_type *fs,
+ int flags, const char *dev_name, void *data)
{
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs2_internal_read_super_mtd, mnt);
+ return mount_bdev(fs, flags, dev_name, data,
+ yaffs2_internal_read_super_mtd);
}
static struct file_system_type yaffs2_fs_type = {
.owner = THIS_MODULE,
.name = "yaffs2",
- .get_sb = yaffs2_read_super,
+ .mount = yaffs2_mount,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
-#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, struct yaffs_dev *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);
-
- buf += sprintf(buf, "\n");
+ struct yaffs_param *param = &dev->param;
+
+ 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, "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);
return buf;
}
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 +=
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);
+ 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);
mutex_lock(&yaffs_context_lock);
- /* Locate and print the Nth entry. Order N-squared but N is small. */
+ /* 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,
buf = yaffs_dump_dev_part0(buf, dev);
} else {
buf = yaffs_dump_dev_part1(buf, dev);
- }
+ }
break;
}
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 list_head *item;
- char *buf = page;
- int n = 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;
-
- 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);
-
- return buf - page < count ? buf - page : count;
-}
-
-/**
- * Set the verbosity of the warnings and error messages.
- *
- * Note that the names can only be a..z or _ with the current code.
- */
-
-static struct {
- char *mask_name;
- unsigned mask_bitfield;
-} mask_flags[] = {
- {
- "allocate", YAFFS_TRACE_ALLOCATE}, {
- "always", YAFFS_TRACE_ALWAYS}, {
- "background", YAFFS_TRACE_BACKGROUND}, {
- "bad_blocks", YAFFS_TRACE_BAD_BLOCKS}, {
- "buffers", YAFFS_TRACE_BUFFERS}, {
- "bug", YAFFS_TRACE_BUG}, {
- "checkpt", YAFFS_TRACE_CHECKPOINT}, {
- "deletion", YAFFS_TRACE_DELETION}, {
- "erase", YAFFS_TRACE_ERASE}, {
- "error", YAFFS_TRACE_ERROR}, {
- "gc_detail", YAFFS_TRACE_GC_DETAIL}, {
- "gc", YAFFS_TRACE_GC}, {
- "lock", YAFFS_TRACE_LOCK}, {
- "mtd", YAFFS_TRACE_MTD}, {
- "nandaccess", YAFFS_TRACE_NANDACCESS}, {
- "os", YAFFS_TRACE_OS}, {
- "scan_debug", YAFFS_TRACE_SCAN_DEBUG}, {
- "scan", YAFFS_TRACE_SCAN}, {
- "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 rg = 0, mask_bitfield;
- char *end;
- char *mask_name;
- const char *x;
- char substring[MAX_MASK_NAME_LENGTH + 1];
- int i;
- int done = 0;
- int add, len = 0;
- int pos = 0;
-
- rg = yaffs_trace_mask;
-
- while (!done && (pos < count)) {
- done = 1;
- while ((pos < count) && isspace(buf[pos]))
- pos++;
-
- switch (buf[pos]) {
- case '+':
- case '-':
- case '=':
- add = buf[pos];
- pos++;
- break;
-
- default:
- add = ' ';
- break;
- }
- mask_name = NULL;
-
- mask_bitfield = simple_strtoul(buf + pos, &end, 0);
-
- if (end > buf + pos) {
- mask_name = "numeral";
- len = end - (buf + pos);
- pos += len;
- done = 0;
- } else {
- for (x = buf + pos, i = 0;
- (*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) {
- mask_name = mask_flags[i].mask_name;
- mask_bitfield =
- mask_flags[i].mask_bitfield;
- done = 0;
- break;
- }
- }
- }
-
- if (mask_name != NULL) {
- done = 0;
- switch (add) {
- case '-':
- rg &= ~mask_bitfield;
- break;
- case '+':
- rg |= mask_bitfield;
- break;
- case '=':
- rg = mask_bitfield;
- break;
- default:
- rg |= mask_bitfield;
- break;
- }
- }
- }
-
- yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS;
-
- printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask);
-
- if (rg & YAFFS_TRACE_ALWAYS) {
- for (i = 0; mask_flags[i].mask_name != NULL; i++) {
- 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);
- }
- }
-
- return count;
-}
-static int yaffs_proc_write(struct file *file, const char *buf,
- unsigned long count, void *data)
-{
- return yaffs_proc_write_trace_options(file, buf, count, data);
-}
/* Stuff to handle installation of file systems */
struct file_system_to_install {
int error = 0;
struct file_system_to_install *fsinst;
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs built " __DATE__ " " __TIME__ " Installing. \n")));
-
-#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
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs built " __DATE__ " " __TIME__ " Installing.");
mutex_init(&yaffs_context_lock);
/* Install the proc_fs entries */
my_proc_entry = create_proc_entry("yaffs",
- S_IRUGO | S_IFREG, YPROC_ROOT);
+ S_IRUGO | S_IFREG, NULL);
if (my_proc_entry) {
- my_proc_entry->write_proc = yaffs_proc_write;
+ my_proc_entry->write_proc = NULL;
my_proc_entry->read_proc = yaffs_proc_read;
my_proc_entry->data = NULL;
} else {
return -ENOMEM;
- }
-
- debug_proc_entry = create_proc_entry("yaffs_stats",
- S_IRUGO | S_IFREG, YPROC_ROOT);
+ }
- 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;
- }
/* 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 built " __DATE__ " " __TIME__ " removing.");
- remove_proc_entry("yaffs", YPROC_ROOT);
- remove_proc_entry("yaffs_stats", YPROC_ROOT);
+ remove_proc_entry("yaffs", NULL);
fsinst = fs_to_install;
}
module_init(init_yaffs_fs)
- module_exit(exit_yaffs_fs)
+module_exit(exit_yaffs_fs)
- MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
-MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010");
+MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2011");
MODULE_LICENSE("GPL");
projects / yaffs2.git / blobdiff