#define YAFFS_NEW_FOLLOW_LINK 0
#endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
+#define YAFFS_HAS_WRITE_SUPER
+#endif
+
+
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
#include <linux/config.h>
#endif
#define Y_INIT_TIMER(a) init_timer_on_stack(a)
#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-#define WRITE_SIZE_STR "writesize"
-#define WRITE_SIZE(mtd) ((mtd)->writesize)
-#else
-#define WRITE_SIZE_STR "oobblock"
-#define WRITE_SIZE(mtd) ((mtd)->oobblock)
-#endif
-
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
#define YAFFS_USE_WRITE_BEGIN_END 1
#else
#define YAFFS_USE_WRITE_BEGIN_END 0
#endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
+#define YAFFS_SUPER_HAS_DIRTY
+#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
/* use iget and read_inode */
#define Y_IGET(sb, inum) iget((sb), (inum))
-static void yaffs_read_inode(struct inode *inode);
#else
/* Call local equivalent */
#define YAFFS_USE_OWN_IGET
#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
#endif
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->u.generic_sbp)
#endif
-#define update_dir_time(dir) do {\
- (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
- } while (0)
-
-static void yaffs_put_super(struct super_block *sb);
-
-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
- loff_t *pos);
-static ssize_t yaffs_hold_space(struct file *f);
-static void yaffs_release_space(struct file *f);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_file_flush(struct file *file, fl_owner_t id);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
+#define Y_CLEAR_INODE(i) clear_inode(i)
#else
-static int yaffs_file_flush(struct file *file);
+#define Y_CLEAR_INODE(i) end_writeback(i)
#endif
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync);
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-static int yaffs_sync_object(struct file *file, int datasync);
-#else
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync);
-#endif
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
+#define update_dir_time(dir) do {\
+ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
+ } while (0)
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *n);
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *n);
-#else
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
-#endif
-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry);
-static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname);
-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+static void yaffs_fill_inode_from_obj(struct inode *inode,
+ struct yaffs_obj *obj);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t dev);
-#else
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- int dev);
-#endif
-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry);
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_sync_fs(struct super_block *sb, int wait);
-static void yaffs_write_super(struct super_block *sb);
-#else
-static int yaffs_sync_fs(struct super_block *sb);
-static int yaffs_write_super(struct super_block *sb);
-#endif
+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);
+}
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
-#else
-static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
-#endif
+static void yaffs_gross_unlock(struct yaffs_dev *dev)
+{
+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current);
+ mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
+}
-#ifdef YAFFS_HAS_PUT_INODE
-static void yaffs_put_inode(struct inode *inode);
-#endif
-#ifdef YAFFS_HAS_EVICT_INODE
-static void yaffs_evict_inode(struct inode *);
-#else
-static void yaffs_delete_inode(struct inode *);
-static void yaffs_clear_inode(struct inode *);
-#endif
+static int yaffs_readpage_nolock(struct file *f, struct page *pg)
+{
+ /* Lifted from jffs2 */
-static int yaffs_readpage(struct file *file, struct page *page);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
-#else
-static int yaffs_writepage(struct page *page);
-#endif
+ struct yaffs_obj *obj;
+ unsigned char *pg_buf;
+ int ret;
+ loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
+ struct yaffs_dev *dev;
-static int yaffs_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags);
-static ssize_t yaffs_getxattr(struct dentry *dentry, const char *name,
- void *buff, size_t size);
-static int yaffs_removexattr(struct dentry *dentry, const char *name);
-static ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readpage_nolock at %lld, size %08x",
+ (long long)pos,
+ (unsigned)PAGE_CACHE_SIZE);
-#if (YAFFS_USE_WRITE_BEGIN_END != 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata);
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata);
-#else
-static int yaffs_prepare_write(struct file *f, struct page *pg,
- unsigned offset, unsigned to);
-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
- unsigned to);
+ obj = yaffs_dentry_to_obj(f->f_dentry);
-#endif
+ dev = obj->my_dev;
-static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
- int buflen);
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
-void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ BUG_ON(!PageLocked(pg));
#else
-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+ if (!PageLocked(pg))
+ PAGE_BUG(pg);
#endif
-static void yaffs_touch_super(struct yaffs_dev *dev);
+ pg_buf = kmap(pg);
+ /* FIXME: Can kmap fail? */
-static int yaffs_vfs_setattr(struct inode *, struct iattr *);
+ yaffs_gross_lock(dev);
-static struct address_space_operations yaffs_file_address_operations = {
- .readpage = yaffs_readpage,
- .writepage = yaffs_writepage,
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
- .write_begin = yaffs_write_begin,
- .write_end = yaffs_write_end,
-#else
- .prepare_write = yaffs_prepare_write,
- .commit_write = yaffs_commit_write,
-#endif
-};
+ ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
-static const struct file_operations yaffs_file_operations = {
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
- .splice_read = generic_file_splice_read,
- .splice_write = generic_file_splice_write,
- .llseek = generic_file_llseek,
-};
+ yaffs_gross_unlock(dev);
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+ if (ret >= 0)
+ ret = 0;
-static const struct file_operations yaffs_file_operations = {
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
- .sendfile = generic_file_sendfile,
-};
+ if (ret) {
+ ClearPageUptodate(pg);
+ SetPageError(pg);
+ } else {
+ SetPageUptodate(pg);
+ ClearPageError(pg);
+ }
-#else
+ flush_dcache_page(pg);
+ kunmap(pg);
-static const struct file_operations yaffs_file_operations = {
- .read = generic_file_read,
- .write = generic_file_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- .sendfile = generic_file_sendfile,
-#endif
-};
-#endif
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done");
+ return ret;
+}
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-static void zero_user_segment(struct page *page, unsigned start, unsigned end)
+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
{
- void *kaddr = kmap_atomic(page, KM_USER0);
- memset(kaddr + start, 0, end - start);
- kunmap_atomic(kaddr, KM_USER0);
- flush_dcache_page(page);
+ int ret = yaffs_readpage_nolock(f, pg);
+ UnlockPage(pg);
+ return ret;
}
-#endif
-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 int yaffs_readpage(struct file *f, struct page *pg)
+{
+ int ret;
-static const struct inode_operations yaffs_symlink_inode_operations = {
- .readlink = yaffs_readlink,
- .follow_link = yaffs_follow_link,
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
- .put_link = yaffs_put_link,
-#endif
- .setattr = yaffs_setattr,
- .setxattr = yaffs_setxattr,
- .getxattr = yaffs_getxattr,
- .listxattr = yaffs_listxattr,
- .removexattr = yaffs_removexattr,
-};
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage");
+ ret = yaffs_readpage_unlock(f, pg);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done");
+ return ret;
+}
-static const struct 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,
-};
-static const struct file_operations yaffs_dir_operations = {
- .read = generic_read_dir,
- .readdir = yaffs_readdir,
- .fsync = yaffs_sync_object,
- .llseek = generic_file_llseek,
-};
+static void yaffs_set_super_dirty_val(struct yaffs_dev *dev, int val)
+{
+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-static const struct super_operations yaffs_super_ops = {
- .statfs = yaffs_statfs,
+ if (lc)
+ lc->dirty = val;
-#ifndef YAFFS_USE_OWN_IGET
- .read_inode = yaffs_read_inode,
-#endif
-#ifdef YAFFS_HAS_PUT_INODE
- .put_inode = yaffs_put_inode,
-#endif
- .put_super = yaffs_put_super,
-#ifdef YAFFS_HAS_EVICT_INODE
- .evict_inode = yaffs_evict_inode,
-#else
- .delete_inode = yaffs_delete_inode,
- .clear_inode = yaffs_clear_inode,
-#endif
- .sync_fs = yaffs_sync_fs,
- .write_super = yaffs_write_super,
-};
+# ifdef YAFFS_SUPER_HAS_DIRTY
+ {
+ struct super_block *sb = lc->super;
-static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
-{
-#ifdef YAFFS_USE_SETATTR_COPY
- setattr_copy(inode, attr);
- return 0;
-#else
- return inode_setattr(inode, attr);
+ if (sb)
+ sb->s_dirt = val;
+ }
#endif
}
-static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
+static void yaffs_set_super_dirty(struct yaffs_dev *dev)
{
-#ifdef YAFFS_USE_TRUNCATE_SETSIZE
- truncate_setsize(inode, newsize);
- return 0;
-#else
- truncate_inode_pages(&inode->i_data, newsize);
- return 0;
-#endif
-
+ yaffs_set_super_dirty_val(dev, 1);
}
-static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
+static void yaffs_clear_super_dirty(struct yaffs_dev *dev)
{
- return yaffs_gc_control;
+ yaffs_set_super_dirty_val(dev, 0);
}
-static void yaffs_gross_lock(struct yaffs_dev *dev)
+static int yaffs_check_super_dirty(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);
-}
+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-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));
-}
+ if (lc && lc->dirty)
+ return 1;
-#ifdef YAFFS_COMPILE_EXPORTFS
+# ifdef YAFFS_SUPER_HAS_DIRTY
+ {
+ struct super_block *sb = lc->super;
-static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
- uint32_t generation)
-{
- return Y_IGET(sb, ino);
-}
+ if (sb && sb->s_dirt)
+ return 1;
+ }
+#endif
+ return 0;
-static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb,
- struct fid *fid, int fh_len,
- int fh_type)
-{
- return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
- yaffs2_nfs_get_inode);
}
-static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
- struct fid *fid, int fh_len,
- int fh_type)
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+#else
+static int yaffs_writepage(struct page *page)
+#endif
{
- return generic_fh_to_parent(sb, fid, fh_len, fh_type,
- yaffs2_nfs_get_inode);
-}
+ 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;
-struct dentry *yaffs2_get_parent(struct dentry *dentry)
-{
+ if (!mapping)
+ BUG();
+ inode = mapping->host;
+ if (!inode)
+ BUG();
+ i_size = i_size_read(inode);
- 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;
+ end_index = i_size >> PAGE_CACHE_SHIFT;
- d_obj = yaffs_inode_to_obj(dentry->d_inode);
+ if (page->index < end_index)
+ n_bytes = PAGE_CACHE_SIZE;
+ else {
+ n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
- 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 (page->index > end_index || !n_bytes) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_writepage at %lld, inode size = %lld!!",
+ ((loff_t)page->index) << PAGE_CACHE_SHIFT,
+ inode->i_size);
+ yaffs_trace(YAFFS_TRACE_OS,
+ " -> don't care!!");
- if (IS_ERR(inode)) {
- parent = ERR_CAST(inode);
- } else {
- parent = d_obtain_alias(inode);
- if (!IS_ERR(parent)) {
- parent = ERR_PTR(-ENOMEM);
- iput(inode);
- }
- }
+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+ set_page_writeback(page);
+ unlock_page(page);
+ end_page_writeback(page);
+ return 0;
}
}
- return parent;
-}
+ if (n_bytes != PAGE_CACHE_SIZE)
+ zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE);
-/* Just declare a zero structure as a NULL value implies
- * using the default functions of exportfs.
- */
+ get_page(page);
-static struct export_operations yaffs_export_ops = {
- .fh_to_dentry = yaffs2_fh_to_dentry,
- .fh_to_parent = yaffs2_fh_to_parent,
- .get_parent = yaffs2_get_parent,
-};
+ buffer = kmap(page);
-#endif
+ obj = yaffs_inode_to_obj(inode);
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
-/*-----------------------------------------------------------------*/
-/* Directory search context allows us to unlock access to yaffs during
- * filldir without causing problems with the directory being modified.
- * This is similar to the tried and tested mechanism used in yaffs direct.
- *
- * A search context iterates along a doubly linked list of siblings in the
- * directory. If the iterating object is deleted then this would corrupt
- * the list iteration, likely causing a crash. The search context avoids
- * this by using the remove_obj_fn to move the search context to the
- * next object before the object is deleted.
- *
- * Many readdirs (and thus seach conexts) may be alive simulateously so
- * each 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.
- */
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_writepage at %lld, size %08x",
+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "writepag0: obj = %lld, ino = %lld",
+ obj->variant.file_variant.file_size, inode->i_size);
-struct yaffs_search_context {
- struct yaffs_dev *dev;
- struct yaffs_obj *dir_obj;
- struct yaffs_obj *next_return;
- struct list_head others;
-};
+ n_written = yaffs_wr_file(obj, buffer,
+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes, 0);
-/*
- * yaffs_new_search() creates a new search context, initialises it and
- * adds it to the device's search context list.
- *
- * Called at start of readdir.
- */
-static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir)
-{
- struct yaffs_dev *dev = dir->my_dev;
- struct yaffs_search_context *sc =
- kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
- if (sc) {
- sc->dir_obj = dir;
- sc->dev = dev;
- if (list_empty(&sc->dir_obj->variant.dir_variant.children))
- sc->next_return = NULL;
- else
- sc->next_return =
- list_entry(dir->variant.dir_variant.children.next,
- struct yaffs_obj, siblings);
- INIT_LIST_HEAD(&sc->others);
- list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
- }
- return sc;
-}
+ yaffs_set_super_dirty(dev);
-/*
- * yaffs_search_end() disposes of a search context and cleans up.
- */
-static void yaffs_search_end(struct yaffs_search_context *sc)
-{
- if (sc) {
- list_del(&sc->others);
- kfree(sc);
- }
-}
+ yaffs_trace(YAFFS_TRACE_OS,
+ "writepag1: obj = %lld, ino = %lld",
+ obj->variant.file_variant.file_size, inode->i_size);
-/*
- * yaffs_search_advance() moves a search context to the next object.
- * Called when the search iterates or when an object removal causes
- * the search context to be moved to the next object.
- */
-static void yaffs_search_advance(struct yaffs_search_context *sc)
-{
- if (!sc)
- return;
+ yaffs_gross_unlock(dev);
- if (sc->next_return == NULL ||
- list_empty(&sc->dir_obj->variant.dir_variant.children))
- sc->next_return = NULL;
- else {
- struct list_head *next = sc->next_return->siblings.next;
+ kunmap(page);
+ set_page_writeback(page);
+ unlock_page(page);
+ end_page_writeback(page);
+ put_page(page);
- if (next == &sc->dir_obj->variant.dir_variant.children)
- sc->next_return = NULL; /* end of list */
- else
- sc->next_return =
- list_entry(next, struct yaffs_obj, siblings);
- }
+ return (n_written == n_bytes) ? 0 : -ENOSPC;
}
-/*
- * yaffs_remove_obj_callback() is called when an object is unlinked.
- * We check open search contexts and advance any which are currently
- * on the object being iterated.
- */
-static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
-{
-
- struct list_head *i;
- struct yaffs_search_context *sc;
- struct list_head *search_contexts =
- &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
-
- /* Iterate through the directory search contexts.
- * If any are currently on the object being removed, then advance
- * the search context to the next object to prevent a hanging pointer.
- */
- list_for_each(i, search_contexts) {
- sc = list_entry(i, struct yaffs_search_context, others);
- if (sc->next_return == obj)
- yaffs_search_advance(sc);
- }
+/* 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;
-/*-----------------------------------------------------------------*/
+ int n_free_chunks;
-static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
- int buflen)
-{
- unsigned char *alias;
- int ret;
+ obj = yaffs_dentry_to_obj(f->f_dentry);
- struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
+ dev = obj->my_dev;
yaffs_gross_lock(dev);
- alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
+ n_free_chunks = yaffs_get_n_free_chunks(dev);
yaffs_gross_unlock(dev);
- if (!alias)
- return -ENOMEM;
+ return (n_free_chunks > 20) ? 1 : 0;
+}
- ret = vfs_readlink(dentry, buffer, buflen, alias);
- kfree(alias);
- return ret;
-}
-
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
- void *ret;
-#else
-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+static void yaffs_release_space(struct file *f)
{
- int ret
-#endif
- unsigned char *alias;
- int ret_int = 0;
- struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev;
+
+ obj = yaffs_dentry_to_obj(f->f_dentry);
+
+ dev = obj->my_dev;
yaffs_gross_lock(dev);
- alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
yaffs_gross_unlock(dev);
-
- if (!alias) {
- ret_int = -ENOMEM;
- goto out;
- }
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
- nd_set_link(nd, alias);
- ret = alias;
-out:
- if (ret_int)
- ret = ERR_PTR(ret_int);
- return ret;
-#else
- ret = vfs_follow_link(nd, alias);
- kfree(alias);
-out:
- if (ret_int)
- ret = ret_int;
- return ret;
-#endif
}
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
-void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
{
- kfree(alias);
-}
-#endif
-
-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
- struct yaffs_obj *obj);
+ struct page *pg = NULL;
+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-/*
- * Lookup is used to find objects in the fs
- */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ int ret = 0;
+ int space_held = 0;
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *n)
+ /* Get a page */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
+ pg = grab_cache_page_write_begin(mapping, index, flags);
#else
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
+ pg = __grab_cache_page(mapping, index);
#endif
-{
- struct yaffs_obj *obj;
- struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
- struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
+ *pagep = pg;
+ if (!pg) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ yaffs_trace(YAFFS_TRACE_OS,
+ "start yaffs_write_begin index %d(%x) uptodate %d",
+ (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0);
- if (current != yaffs_dev_to_lc(dev)->readdir_process)
- yaffs_gross_lock(dev);
+ /* Get fs space */
+ space_held = yaffs_hold_space(filp);
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup for %d:%s",
- yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name);
+ if (!space_held) {
+ ret = -ENOSPC;
+ goto out;
+ }
- obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
+ /* Update page if required */
- obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
+ if (!Page_Uptodate(pg))
+ ret = yaffs_readpage_nolock(filp, pg);
- /* Can't hold gross lock when calling yaffs_get_inode() */
- if (current != yaffs_dev_to_lc(dev)->readdir_process)
- yaffs_gross_unlock(dev);
+ if (ret)
+ goto out;
- if (obj) {
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_lookup found %d", obj->obj_id);
+ /* Happy path return */
+ yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok");
- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
- } else {
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
+ return 0;
+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);
}
-
-/* added NCB for 2.5/6 compatability - forces add even if inode is
- * NULL which creates dentry hash */
- d_add(dentry, inode);
-
- return NULL;
+ return ret;
}
-#ifdef YAFFS_HAS_PUT_INODE
+#else
-/* 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)
+static int yaffs_prepare_write(struct file *f, struct page *pg,
+ unsigned offset, unsigned to)
{
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_put_inode: ino %d, count %d"),
- (int)inode->i_ino, atomic_read(&inode->i_count);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_prepair_write");
+ if (!Page_Uptodate(pg))
+ return yaffs_readpage_nolock(f, pg);
+ return 0;
}
#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);
-}
-#ifdef YAFFS_HAS_EVICT_INODE
-/* yaffs_evict_inode combines into one operation what was previously done in
- * yaffs_clear_inode() and yaffs_delete_inode()
- *
- */
-static void yaffs_evict_inode(struct inode *inode)
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+ loff_t * pos)
{
struct yaffs_obj *obj;
+ int n_written;
+ loff_t ipos;
+ struct inode *inode;
struct yaffs_dev *dev;
- int deleteme = 0;
- obj = yaffs_inode_to_obj(inode);
+ obj = yaffs_dentry_to_obj(f->f_dentry);
+
+ if (!obj) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write: hey obj is null!");
+ return -EINVAL;
+ }
+
+ dev = obj->my_dev;
+
+ yaffs_gross_lock(dev);
+
+ inode = f->f_dentry->d_inode;
+
+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
+ ipos = inode->i_size;
+ else
+ ipos = *pos;
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_file_write about to write writing %u(%x) bytes to object %d at %lld",
+ (unsigned)n, (unsigned)n, obj->obj_id, ipos);
- if (!inode->i_nlink && !is_bad_inode(inode))
- deleteme = 1;
- truncate_inode_pages(&inode->i_data, 0);
- end_writeback(inode);
+ n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
+
+ yaffs_set_super_dirty(dev);
+
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write: %d(%x) bytes written",
+ (unsigned)n, (unsigned)n);
+
+ if (n_written > 0) {
+ ipos += n_written;
+ *pos = ipos;
+ if (ipos > inode->i_size) {
+ inode->i_size = ipos;
+ inode->i_blocks = (ipos + 511) >> 9;
+
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_file_write size updated to %lld bytes, %d blocks",
+ ipos, (int)(inode->i_blocks));
+ }
- 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);
}
+ yaffs_gross_unlock(dev);
+ return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
}
-#else
-/* clear is called to tell the fs to release any per-inode data it holds.
- * The object might still exist on disk and is just being thrown out of the cache
- * or else the object has actually been deleted and we're being called via
- * the chain
- * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
- */
-static void yaffs_clear_inode(struct inode *inode)
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *pg, void *fsdadata)
{
- struct yaffs_obj *obj;
- struct yaffs_dev *dev;
+ int ret = 0;
+ void *addr, *kva;
+ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
- obj = yaffs_inode_to_obj(inode);
+ kva = kmap(pg);
+ addr = kva + offset_into_page;
yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_clear_inode: ino %d, count %d %s",
- (int)inode->i_ino, atomic_read(&inode->i_count),
- obj ? "object exists" : "null object");
-
- if (obj) {
- dev = obj->my_dev;
- yaffs_gross_lock(dev);
- yaffs_unstitch_obj(inode, obj);
- yaffs_gross_unlock(dev);
- }
+ "yaffs_write_end addr %p pos %lld n_bytes %d",
+ addr, pos, copied);
-}
+ ret = yaffs_file_write(filp, addr, copied, &pos);
-/* delete is called when the link count is zero and the inode
- * is put (ie. nobody wants to know about it anymore, time to
- * delete the file).
- * NB Must call clear_inode()
- */
-static void yaffs_delete_inode(struct inode *inode)
+ if (ret != copied) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_write_end not same size ret %d copied %d",
+ ret, copied);
+ SetPageError(pg);
+ }
+
+ kunmap(pg);
+
+ yaffs_release_space(filp);
+ unlock_page(pg);
+ page_cache_release(pg);
+ return ret;
+}
+#else
+
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+ unsigned to)
{
- struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- struct yaffs_dev *dev;
+ void *addr, *kva;
+
+ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
+ int n_bytes = to - offset;
+ int n_written;
+
+ kva = kmap(pg);
+ addr = kva + offset;
yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_delete_inode: ino %d, count %d %s",
- (int)inode->i_ino, atomic_read(&inode->i_count),
- obj ? "object exists" : "null object");
+ "yaffs_commit_write addr %p pos %lld n_bytes %d",
+ addr, pos, n_bytes);
- if (obj) {
- dev = obj->my_dev;
- yaffs_gross_lock(dev);
- yaffs_del_obj(obj);
- yaffs_gross_unlock(dev);
+ n_written = yaffs_file_write(f, addr, n_bytes, &pos);
+
+ if (n_written != n_bytes) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_commit_write not same size n_written %d n_bytes %d",
+ n_written, n_bytes);
+ SetPageError(pg);
}
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
- truncate_inode_pages(&inode->i_data, 0);
-#endif
- clear_inode(inode);
+ kunmap(pg);
+
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_commit_write returning %d",
+ n_written == n_bytes ? 0 : n_written);
+
+ return n_written == n_bytes ? 0 : n_written;
}
#endif
+static struct address_space_operations yaffs_file_address_operations = {
+ .readpage = yaffs_readpage,
+ .writepage = yaffs_writepage,
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+ .write_begin = yaffs_write_begin,
+ .write_end = yaffs_write_end,
+#else
+ .prepare_write = yaffs_prepare_write,
+ .commit_write = yaffs_commit_write,
+#endif
+};
+
+
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
static int yaffs_file_flush(struct file *file, fl_owner_t id)
#else
return 0;
}
-static int yaffs_readpage_nolock(struct file *f, struct page *pg)
-{
- /* Lifted from jffs2 */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync)
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+static int yaffs_sync_object(struct file *file, int datasync)
+#else
+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+ int datasync)
+#endif
+{
struct yaffs_obj *obj;
- unsigned char *pg_buf;
- int ret;
- loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
struct yaffs_dev *dev;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+ struct dentry *dentry = file->f_path.dentry;
+#endif
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_readpage_nolock at %lld, size %08x",
- (long long)pos,
- (unsigned)PAGE_CACHE_SIZE);
-
- obj = yaffs_dentry_to_obj(f->f_dentry);
+ obj = yaffs_dentry_to_obj(dentry);
dev = obj->my_dev;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- BUG_ON(!PageLocked(pg));
-#else
- if (!PageLocked(pg))
- PAGE_BUG(pg);
-#endif
+ 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;
+}
- pg_buf = kmap(pg);
- /* FIXME: Can kmap fail? */
- yaffs_gross_lock(dev);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
+static const struct file_operations yaffs_file_operations = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+ .splice_read = generic_file_splice_read,
+ .splice_write = generic_file_splice_write,
+ .llseek = generic_file_llseek,
+};
- ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
- yaffs_gross_unlock(dev);
+static const struct file_operations yaffs_file_operations = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+ .sendfile = generic_file_sendfile,
+};
- if (ret >= 0)
- ret = 0;
+#else
- if (ret) {
- ClearPageUptodate(pg);
- SetPageError(pg);
- } else {
- SetPageUptodate(pg);
- ClearPageError(pg);
- }
+static const struct file_operations yaffs_file_operations = {
+ .read = generic_file_read,
+ .write = generic_file_write,
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ .sendfile = generic_file_sendfile,
+#endif
+};
+#endif
- flush_dcache_page(pg);
- kunmap(pg);
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done");
- return ret;
-}
-static int yaffs_readpage_unlock(struct file *f, struct page *pg)
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
+static void zero_user_segment(struct page *page, unsigned start, unsigned end)
{
- int ret = yaffs_readpage_nolock(f, pg);
- UnlockPage(pg);
- return ret;
+ void *kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + start, 0, end - start);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
}
+#endif
-static int yaffs_readpage(struct file *f, struct page *pg)
+
+static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
{
- int ret;
+#ifdef YAFFS_USE_TRUNCATE_SETSIZE
+ truncate_setsize(inode, newsize);
+ return 0;
+#else
+ truncate_inode_pages(&inode->i_data, newsize);
+ return 0;
+#endif
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage");
- ret = yaffs_readpage_unlock(f, pg);
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done");
- return ret;
}
-/* writepage inspired by/stolen from smbfs */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
+{
+#ifdef YAFFS_USE_SETATTR_COPY
+ setattr_copy(inode, attr);
+ return 0;
#else
-static int yaffs_writepage(struct page *page)
+ return inode_setattr(inode, attr);
#endif
-{
- 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);
+}
- end_index = i_size >> PAGE_CACHE_SHIFT;
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ struct yaffs_dev *dev;
- if (page->index < end_index)
- n_bytes = PAGE_CACHE_SIZE;
- else {
- n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_setattr of object %d",
+ yaffs_inode_to_obj(inode)->obj_id);
+#if 0
+ /* Fail if a requested resize >= 2GB */
+ if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
+ error = -EINVAL;
+#endif
- if (page->index > end_index || !n_bytes) {
+ if (error == 0)
+ error = inode_change_ok(inode, attr);
+ if (error == 0) {
+ int result;
+ if (!error) {
+ error = yaffs_vfs_setattr(inode, attr);
+ yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
+ if (attr->ia_valid & ATTR_SIZE) {
+ yaffs_vfs_setsize(inode, attr->ia_size);
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+ }
+ }
+ dev = yaffs_inode_to_obj(inode)->my_dev;
+ if (attr->ia_valid & ATTR_SIZE) {
yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_writepage at %lld, inode size = %lld!!",
- ((loff_t)page->index) << PAGE_CACHE_SHIFT,
- inode->i_size);
- yaffs_trace(YAFFS_TRACE_OS,
- " -> don't care!!");
-
- zero_user_segment(page, 0, PAGE_CACHE_SIZE);
- set_page_writeback(page);
- unlock_page(page);
- end_page_writeback(page);
- return 0;
+ "resize to %d(%x)",
+ (int)(attr->ia_size),
+ (int)(attr->ia_size));
+ }
+ yaffs_gross_lock(dev);
+ result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
+ if (result == YAFFS_OK) {
+ error = 0;
+ } else {
+ error = -EPERM;
}
+ yaffs_gross_unlock(dev);
+
}
- 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 = 0;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- obj = yaffs_inode_to_obj(inode);
- dev = obj->my_dev;
- yaffs_gross_lock(dev);
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_writepage at %lld, size %08x",
- ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes);
- yaffs_trace(YAFFS_TRACE_OS,
- "writepag0: obj = %lld, ino = %lld",
- obj->variant.file_variant.file_size, inode->i_size);
+ 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);
- n_written = yaffs_wr_file(obj, buffer,
- ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes, 0);
+ }
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
+
+ return error;
+}
- yaffs_touch_super(dev);
+static 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_trace(YAFFS_TRACE_OS,
- "writepag1: obj = %lld, ino = %lld",
- obj->variant.file_variant.file_size, inode->i_size);
+ "yaffs_getxattr \"%s\" from object %d",
+ name, obj->obj_id);
- yaffs_gross_unlock(dev);
+ if (error == 0) {
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
+ error = yaffs_get_xattrib(obj, name, buff, size);
+ 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_getxattr done returning %d", error);
- return (n_written == n_bytes) ? 0 : -ENOSPC;
+ return error;
}
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
+static int yaffs_removexattr(struct dentry *dentry, const char *name)
{
- struct page *pg = NULL;
- pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-
- int ret = 0;
- int space_held = 0;
-
- /* Get a page */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
- pg = grab_cache_page_write_begin(mapping, index, flags);
-#else
- pg = __grab_cache_page(mapping, index);
-#endif
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
- *pagep = pg;
- if (!pg) {
- ret = -ENOMEM;
- goto out;
- }
yaffs_trace(YAFFS_TRACE_OS,
- "start yaffs_write_begin index %d(%x) uptodate %d",
- (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0);
+ "yaffs_removexattr of object %d", obj->obj_id);
- /* Get fs space */
- space_held = yaffs_hold_space(filp);
+ 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 (!space_held) {
- ret = -ENOSPC;
- goto out;
}
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_removexattr done returning %d", error);
- /* Update page if required */
-
- if (!Page_Uptodate(pg))
- ret = yaffs_readpage_nolock(filp, pg);
+ return error;
+}
- if (ret)
- goto out;
+static ssize_t yaffs_listxattr(struct dentry * dentry, char *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);
- /* Happy path return */
- yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok");
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_listxattr of object %d", obj->obj_id);
- return 0;
+ if (error == 0) {
+ dev = obj->my_dev;
+ yaffs_gross_lock(dev);
+ error = yaffs_list_xattrib(obj, buff, size);
+ yaffs_gross_unlock(dev);
-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;
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_listxattr done returning %d", error);
+
+ return error;
}
-#else
-static int yaffs_prepare_write(struct file *f, struct page *pg,
- unsigned offset, unsigned to)
-{
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_prepair_write");
+static const struct inode_operations yaffs_file_inode_operations = {
+ .setattr = yaffs_setattr,
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .listxattr = yaffs_listxattr,
+ .removexattr = yaffs_removexattr,
+};
- if (!Page_Uptodate(pg))
- return yaffs_readpage_nolock(f, pg);
- return 0;
-}
-#endif
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata)
+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
+ int buflen)
{
- int ret = 0;
- void *addr, *kva;
- uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
+ unsigned char *alias;
+ int ret;
- kva = kmap(pg);
- addr = kva + offset_into_page;
+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_write_end addr %p pos %lld n_bytes %d",
- addr, pos, copied);
+ yaffs_gross_lock(dev);
- ret = yaffs_file_write(filp, addr, copied, &pos);
+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
- if (ret != copied) {
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_write_end not same size ret %d copied %d",
- ret, copied);
- SetPageError(pg);
- }
+ yaffs_gross_unlock(dev);
- kunmap(pg);
+ if (!alias)
+ return -ENOMEM;
- yaffs_release_space(filp);
- unlock_page(pg);
- page_cache_release(pg);
+ ret = vfs_readlink(dentry, buffer, buflen, alias);
+ kfree(alias);
return ret;
}
-#else
-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
- unsigned to)
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
{
- void *addr, *kva;
-
- loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
- int n_bytes = to - offset;
- int n_written;
-
- kva = kmap(pg);
- addr = kva + offset;
+ void *ret;
+#else
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ int ret
+#endif
+ unsigned char *alias;
+ int ret_int = 0;
+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_commit_write addr %p pos %lld n_bytes %d",
- addr, pos, n_bytes);
+ yaffs_gross_lock(dev);
- n_written = yaffs_file_write(f, addr, n_bytes, &pos);
+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
+ yaffs_gross_unlock(dev);
- if (n_written != n_bytes) {
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_commit_write not same size n_written %d n_bytes %d",
- n_written, n_bytes);
- SetPageError(pg);
+ if (!alias) {
+ ret_int = -ENOMEM;
+ goto out;
}
- kunmap(pg);
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+ nd_set_link(nd, alias);
+ ret = alias;
+out:
+ if (ret_int)
+ ret = ERR_PTR(ret_int);
+ return ret;
+#else
+ ret = vfs_follow_link(nd, alias);
+ kfree(alias);
+out:
+ if (ret_int)
+ ret = ret_int;
+ return ret;
+#endif
+}
+
+
+#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)
+{
yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_commit_write returning %d",
- n_written == n_bytes ? 0 : n_written);
+ "yaffs_put_inode: ino %d, count %d"),
+ (int)inode->i_ino, atomic_read(&inode->i_count);
- return n_written == n_bytes ? 0 : n_written;
}
#endif
-static void yaffs_fill_inode_from_obj(struct inode *inode,
- struct yaffs_obj *obj)
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
{
- if (inode && obj) {
+ kfree(alias);
+}
+#endif
- /* 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;
- }
+static const struct inode_operations yaffs_symlink_inode_operations = {
+ .readlink = yaffs_readlink,
+ .follow_link = yaffs_follow_link,
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+ .put_link = yaffs_put_link,
+#endif
+ .setattr = yaffs_setattr,
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .listxattr = yaffs_listxattr,
+ .removexattr = yaffs_removexattr,
+};
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (!S_ISLNK(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFLNK;
- }
+#ifdef YAFFS_USE_OWN_IGET
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- if (!S_ISDIR(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFDIR;
- }
+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);
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- default:
- /* TODO? */
- break;
- }
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
- inode->i_flags |= S_NOATIME;
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
- inode->i_ino = obj->obj_id;
- inode->i_mode = obj->yst_mode;
- inode->i_uid = obj->yst_uid;
- inode->i_gid = obj->yst_gid;
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
- inode->i_blksize = inode->i_sb->s_blocksize;
-#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ /* 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.
+ */
- inode->i_rdev = old_decode_dev(obj->yst_rdev);
- inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
- inode->i_atime.tv_nsec = 0;
- inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
- inode->i_mtime.tv_nsec = 0;
- inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
- inode->i_ctime.tv_nsec = 0;
-#else
- inode->i_rdev = obj->yst_rdev;
- inode->i_atime = obj->yst_atime;
- inode->i_mtime = obj->yst_mtime;
- inode->i_ctime = obj->yst_ctime;
-#endif
- inode->i_size = yaffs_get_obj_length(obj);
- inode->i_blocks = (inode->i_size + 511) >> 9;
+ yaffs_gross_lock(dev);
- set_nlink(inode, yaffs_get_obj_link_count(obj));
+ obj = yaffs_find_by_number(dev, inode->i_ino);
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_fill_inode mode %x uid %d gid %d size %lld count %d",
- inode->i_mode, inode->i_uid, inode->i_gid,
- inode->i_size, atomic_read(&inode->i_count));
+ yaffs_fill_inode_from_obj(inode, obj);
+
+ yaffs_gross_unlock(dev);
+
+ unlock_new_inode(inode);
+ return inode;
+}
- switch (obj->yst_mode & S_IFMT) {
- default: /* fifo, device or socket */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- init_special_inode(inode, obj->yst_mode,
- old_decode_dev(obj->yst_rdev));
#else
- init_special_inode(inode, obj->yst_mode,
- (dev_t) (obj->yst_rdev));
-#endif
- break;
- case S_IFREG: /* file */
- inode->i_op = &yaffs_file_inode_operations;
- inode->i_fop = &yaffs_file_operations;
- inode->i_mapping->a_ops =
- &yaffs_file_address_operations;
- break;
- case S_IFDIR: /* directory */
- inode->i_op = &yaffs_dir_inode_operations;
- inode->i_fop = &yaffs_dir_operations;
- break;
- case S_IFLNK: /* symlink */
- inode->i_op = &yaffs_symlink_inode_operations;
- break;
- }
- yaffs_inode_to_obj_lv(inode) = obj;
+static void yaffs_read_inode(struct inode *inode)
+{
+ /* NB This is called as a side effect of other functions, but
+ * we had to release the lock to prevent deadlocks, so
+ * need to lock again.
+ */
- obj->my_inode = inode;
+ struct yaffs_obj *obj;
+ struct yaffs_dev *dev = yaffs_super_to_dev(inode->i_sb);
- } else {
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_fill_inode invalid parameters");
- }
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_read_inode for %d", (int)inode->i_ino);
+
+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
+ yaffs_gross_lock(dev);
+
+ obj = yaffs_find_by_number(dev, inode->i_ino);
+ yaffs_fill_inode_from_obj(inode, obj);
+
+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
+ yaffs_gross_unlock(dev);
}
+#endif
+
+
+
struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
struct yaffs_obj *obj)
{
return inode;
}
-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
- loff_t * pos)
+
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+#define YCRED(x) x
+#else
+#define YCRED(x) (x->cred)
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
+ dev_t rdev)
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+ dev_t rdev)
+#else
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+ int rdev)
+#endif
{
- struct yaffs_obj *obj;
- int n_written;
- loff_t ipos;
struct inode *inode;
- struct yaffs_dev *dev;
-
- obj = yaffs_dentry_to_obj(f->f_dentry);
- if (!obj) {
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_file_write: hey obj is null!");
- return -EINVAL;
- }
+ struct yaffs_obj *obj = NULL;
+ struct yaffs_dev *dev;
- dev = obj->my_dev;
+ struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
- yaffs_gross_lock(dev);
+ int error = -ENOSPC;
+ uid_t uid = YCRED(current)->fsuid;
+ gid_t gid =
+ (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
- inode = f->f_dentry->d_inode;
+ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+ mode |= S_ISGID;
- if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
- ipos = inode->i_size;
- else
- ipos = *pos;
+ if (parent) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_mknod: parent object %d type %d",
+ parent->obj_id, parent->variant_type);
+ } else {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_mknod: could not get parent object");
+ return -EPERM;
+ }
yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_file_write about to write writing %u(%x) bytes to object %d at %lld",
- (unsigned)n, (unsigned)n, obj->obj_id, ipos);
-
- n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
+ "yaffs_mknod: making oject for %s, mode %x dev %x",
+ dentry->d_name.name, mode, rdev);
- yaffs_touch_super(dev);
+ dev = parent->my_dev;
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_file_write: %d(%x) bytes written",
- (unsigned)n, (unsigned)n);
-
- if (n_written > 0) {
- ipos += n_written;
- *pos = ipos;
- if (ipos > inode->i_size) {
- inode->i_size = ipos;
- inode->i_blocks = (ipos + 511) >> 9;
-
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_file_write size updated to %lld bytes, %d blocks",
- ipos, (int)(inode->i_blocks));
- }
-
- }
- yaffs_gross_unlock(dev);
- return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
-}
-
-/* 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;
-
- int n_free_chunks;
-
- obj = yaffs_dentry_to_obj(f->f_dentry);
-
- dev = obj->my_dev;
-
- yaffs_gross_lock(dev);
-
- n_free_chunks = yaffs_get_n_free_chunks(dev);
-
- yaffs_gross_unlock(dev);
-
- return (n_free_chunks > 20) ? 1 : 0;
-}
-
-static void yaffs_release_space(struct file *f)
-{
- struct yaffs_obj *obj;
- struct yaffs_dev *dev;
-
- obj = yaffs_dentry_to_obj(f->f_dentry);
-
- dev = obj->my_dev;
-
- yaffs_gross_lock(dev);
-
- yaffs_gross_unlock(dev);
-}
-
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
-{
- 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;
-
- yaffs_gross_lock(dev);
-
- yaffs_dev_to_lc(dev)->readdir_process = current;
-
- offset = f->f_pos;
-
- sc = yaffs_new_search(obj);
- if (!sc) {
- ret_val = -ENOMEM;
- goto out;
- }
-
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_readdir: starting at %d", (int)offset);
-
- 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++;
- }
-
- 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;
- }
-
- 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 ret_val;
-}
-
-/*
- * File creation. Allocate an inode, and we're done..
- */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-#define YCRED(x) x
-#else
-#define YCRED(x) (x->cred)
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t rdev)
-#else
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- int rdev)
-#endif
-{
- struct inode *inode;
-
- struct yaffs_obj *obj = NULL;
- struct yaffs_dev *dev;
-
- struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
-
- 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;
-
- if (parent) {
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_mknod: parent object %d type %d",
- parent->obj_id, parent->variant_type);
- } else {
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_mknod: could not get parent object");
- return -EPERM;
- }
-
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_mknod: making oject for %s, mode %x dev %x",
- dentry->d_name.name, mode, rdev);
-
- dev = parent->my_dev;
-
- yaffs_gross_lock(dev);
+ yaffs_gross_lock(dev);
switch (mode & S_IFMT) {
default:
return error;
}
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+#else
static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+#endif
{
int ret_val;
yaffs_trace(YAFFS_TRACE_OS, "yaffs_mkdir");
return ret_val;
}
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool dummy)
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ struct nameidata *n)
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
struct nameidata *n)
#else
return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
}
-static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int dummy)
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *n)
+#else
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
+#endif
{
- int ret_val;
-
- struct yaffs_dev *dev;
struct yaffs_obj *obj;
+ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
- 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;
+ struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
- yaffs_gross_lock(dev);
+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
+ yaffs_gross_lock(dev);
- ret_val = yaffs_unlinker(obj, 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);
- if (ret_val == YAFFS_OK) {
- inode_dec_link_count(dentry->d_inode);
- dir->i_version++;
+ obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
+
+ obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
+
+ /* Can't hold gross lock when calling yaffs_get_inode() */
+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
yaffs_gross_unlock(dev);
- update_dir_time(dir);
- return 0;
- }
- yaffs_gross_unlock(dev);
- return -ENOTEMPTY;
-}
-/*
- * Create a link...
- */
+ if (obj) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_lookup found %d", obj->obj_id);
+
+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+ } else {
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
+
+ }
+
+/* added NCB for 2.5/6 compatability - forces add even if inode is
+ * NULL which creates dentry hash */
+ d_add(dentry, inode);
+
+ return NULL;
+}
+
+/*
+ * Create a link...
+ */
static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
return -ENOMEM;
}
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync)
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-static int yaffs_sync_object(struct file *file, int datasync)
-#else
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync)
-#endif
+/*
+ * 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)
+{
+ struct yaffs_dev *dev;
+ int ret_val = YAFFS_FAIL;
+ struct yaffs_obj *target;
+
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
+ dev = yaffs_inode_to_obj(old_dir)->my_dev;
+
+ yaffs_gross_lock(dev);
+
+ /* Check if the target is an existing directory that is not empty. */
+ target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
+ new_dentry->d_name.name);
+
+ if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ !list_empty(&target->variant.dir_variant.children)) {
+
+ yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
+
+ ret_val = YAFFS_FAIL;
+ } else {
+ /* Now does unlinking internally using shadowing mechanism */
+ yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
+
+ ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
+ old_dentry->d_name.name,
+ yaffs_inode_to_obj(new_dir),
+ new_dentry->d_name.name);
+ }
+ yaffs_gross_unlock(dev);
+
+ if (ret_val == YAFFS_OK) {
+ if (target)
+ inode_dec_link_count(new_dentry->d_inode);
+
+ update_dir_time(old_dir);
+ if (old_dir != new_dir)
+ update_dir_time(new_dir);
+ return 0;
+ } else {
+ return -ENOTEMPTY;
+ }
+}
+
+
+
+
+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ int ret_val;
+
+ struct yaffs_dev *dev;
+ struct yaffs_obj *obj;
+
+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_unlink %d:%s",
+ (int)(dir->i_ino), dentry->d_name.name);
+ obj = yaffs_inode_to_obj(dir);
+ dev = obj->my_dev;
+
+ yaffs_gross_lock(dev);
+
+ ret_val = yaffs_unlinker(obj, dentry->d_name.name);
+
+ 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 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;
+};
+
+/*
+ * yaffs_new_search() creates a new search context, initialises it and
+ * adds it to the device's search context list.
+ *
+ * Called at start of readdir.
+ */
+static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir)
+{
+ struct yaffs_dev *dev = dir->my_dev;
+ struct yaffs_search_context *sc =
+ kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
+ if (sc) {
+ sc->dir_obj = dir;
+ sc->dev = dev;
+ if (list_empty(&sc->dir_obj->variant.dir_variant.children))
+ sc->next_return = NULL;
+ else
+ sc->next_return =
+ list_entry(dir->variant.dir_variant.children.next,
+ struct yaffs_obj, siblings);
+ INIT_LIST_HEAD(&sc->others);
+ list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
+ }
+ return sc;
+}
+
+/*
+ * yaffs_search_end() disposes of a search context and cleans up.
+ */
+static void yaffs_search_end(struct yaffs_search_context *sc)
+{
+ if (sc) {
+ list_del(&sc->others);
+ kfree(sc);
+ }
+}
+
+/*
+ * yaffs_search_advance() moves a search context to the next object.
+ * Called when the search iterates or when an object removal causes
+ * the search context to be moved to the next object.
+ */
+static void yaffs_search_advance(struct yaffs_search_context *sc)
+{
+ if (!sc)
+ return;
+
+ if (sc->next_return == NULL ||
+ list_empty(&sc->dir_obj->variant.dir_variant.children))
+ sc->next_return = NULL;
+ else {
+ struct list_head *next = sc->next_return->siblings.next;
+
+ if (next == &sc->dir_obj->variant.dir_variant.children)
+ sc->next_return = NULL; /* end of list */
+ else
+ sc->next_return =
+ list_entry(next, struct yaffs_obj, siblings);
+ }
+}
+
+/*
+ * yaffs_remove_obj_callback() is called when an object is unlinked.
+ * We check open search contexts and advance any which are currently
+ * on the object being iterated.
+ */
+static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
{
+ struct list_head *i;
+ struct yaffs_search_context *sc;
+ struct list_head *search_contexts =
+ &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
+
+ /* Iterate through the directory search contexts.
+ * If any are currently on the object being removed, then advance
+ * the search context to the next object to prevent a hanging pointer.
+ */
+ list_for_each(i, search_contexts) {
+ sc = list_entry(i, struct yaffs_search_context, others);
+ if (sc->next_return == obj)
+ yaffs_search_advance(sc);
+ }
+
+}
+
+
+/*-----------------------------------------------------------------*/
+
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
+{
struct yaffs_obj *obj;
struct yaffs_dev *dev;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
- struct dentry *dentry = file->f_path.dentry;
-#endif
+ 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;
- obj = yaffs_dentry_to_obj(dentry);
+ char name[YAFFS_MAX_NAME_LENGTH + 1];
+ obj = yaffs_dentry_to_obj(f->f_dentry);
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_dev_to_lc(dev)->readdir_process = current;
+
+ offset = f->f_pos;
+
+ sc = yaffs_new_search(obj);
+ if (!sc) {
+ ret_val = -ENOMEM;
+ goto out;
+ }
+
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_readdir: starting at %d", (int)offset);
+
+ 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++;
+ }
+
+ 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;
+ }
+
+ 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 ret_val;
+}
+
+static const struct file_operations yaffs_dir_operations = {
+ .read = generic_read_dir,
+ .readdir = yaffs_readdir,
+ .fsync = yaffs_sync_object,
+ .llseek = generic_file_llseek,
+};
+
+static void yaffs_fill_inode_from_obj(struct inode *inode,
+ struct yaffs_obj *obj)
+{
+ 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;
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+ inode->i_blksize = inode->i_sb->s_blocksize;
+#endif
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+
+ inode->i_rdev = old_decode_dev(obj->yst_rdev);
+ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
+ inode->i_atime.tv_nsec = 0;
+ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
+ inode->i_mtime.tv_nsec = 0;
+ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
+ inode->i_ctime.tv_nsec = 0;
+#else
+ inode->i_rdev = obj->yst_rdev;
+ inode->i_atime = obj->yst_atime;
+ inode->i_mtime = obj->yst_mtime;
+ inode->i_ctime = obj->yst_ctime;
+#endif
+ inode->i_size = yaffs_get_obj_length(obj);
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+
+ set_nlink(inode, yaffs_get_obj_link_count(obj));
+
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_fill_inode mode %x uid %d gid %d size %lld count %d",
+ inode->i_mode, inode->i_uid, inode->i_gid,
+ inode->i_size, atomic_read(&inode->i_count));
+
+ switch (obj->yst_mode & S_IFMT) {
+ default: /* fifo, device or socket */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ init_special_inode(inode, obj->yst_mode,
+ old_decode_dev(obj->yst_rdev));
+#else
+ init_special_inode(inode, obj->yst_mode,
+ (dev_t) (obj->yst_rdev));
+#endif
+ break;
+ case S_IFREG: /* file */
+ inode->i_op = &yaffs_file_inode_operations;
+ inode->i_fop = &yaffs_file_operations;
+ inode->i_mapping->a_ops =
+ &yaffs_file_address_operations;
+ break;
+ case S_IFDIR: /* directory */
+ inode->i_op = &yaffs_dir_inode_operations;
+ inode->i_fop = &yaffs_dir_operations;
+ break;
+ case S_IFLNK: /* symlink */
+ inode->i_op = &yaffs_symlink_inode_operations;
+ break;
+ }
+
+ yaffs_inode_to_obj_lv(inode) = obj;
+
+ obj->my_inode = inode;
+
+ } else {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "yaffs_fill_inode invalid parameters");
+ }
+
+}
+
+
+
+/*
+ * yaffs background thread functions .
+ * yaffs_bg_thread_fn() the thread function
+ * yaffs_bg_start() launches the background thread.
+ * yaffs_bg_stop() cleans up the background thread.
+ *
+ * NB:
+ * The thread should only run after the yaffs is initialised
+ * The thread should be stopped before yaffs is unmounted.
+ * The thread should not do any writing while the fs is in read only.
+ */
+
+static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev)
+{
+ unsigned erased_chunks =
+ dev->n_erased_blocks * dev->param.chunks_per_block;
+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
+ unsigned scattered = 0; /* Free chunks not in an erased block */
+
+ if (erased_chunks < dev->n_free_chunks)
+ scattered = (dev->n_free_chunks - erased_chunks);
+
+ if (!context->bg_running)
+ return 0;
+ else if (scattered < (dev->param.chunks_per_block * 2))
+ return 0;
+ else if (erased_chunks > dev->n_free_chunks / 2)
+ return 0;
+ else if (erased_chunks > dev->n_free_chunks / 4)
+ return 1;
+ else
+ return 2;
+}
+
+#ifdef YAFFS_COMPILE_BACKGROUND
+
+void yaffs_background_waker(unsigned long data)
+{
+ wake_up_process((struct task_struct *)data);
+}
+
+static int yaffs_bg_thread_fn(void *data)
+{
+ struct yaffs_dev *dev = (struct yaffs_dev *)data;
+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
+ unsigned long now = jiffies;
+ unsigned long next_dir_update = now;
+ unsigned long next_gc = now;
+ unsigned long expires;
+ unsigned int urgency;
+
+ int gc_result;
+ struct timer_list timer;
+
+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
+ "yaffs_background starting for dev %p", (void *)dev);
+
+#ifdef YAFFS_COMPILE_FREEZER
+ set_freezable();
+#endif
+ while (context->bg_running) {
+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
+
+ if (kthread_should_stop())
+ break;
+
+#ifdef YAFFS_COMPILE_FREEZER
+ if (try_to_freeze())
+ continue;
+#endif
+ yaffs_gross_lock(dev);
+
+ now = jiffies;
+
+ if (time_after(now, next_dir_update) && yaffs_bg_enable) {
+ yaffs_update_dirty_dirs(dev);
+ next_dir_update = now + HZ;
+ }
+
+ if (time_after(now, next_gc) && yaffs_bg_enable) {
+ if (!dev->is_checkpointed) {
+ urgency = yaffs_bg_gc_urgency(dev);
+ gc_result = yaffs_bg_gc(dev, urgency);
+ if (urgency > 1)
+ next_gc = now + HZ / 20 + 1;
+ else if (urgency > 0)
+ next_gc = now + HZ / 10 + 1;
+ else
+ next_gc = now + HZ * 2;
+ } else {
+ /*
+ * gc not running so set to next_dir_update
+ * to cut down on wake ups
+ */
+ next_gc = next_dir_update;
+ }
+ }
+ yaffs_gross_unlock(dev);
+#if 1
+ expires = next_dir_update;
+ if (time_before(next_gc, expires))
+ expires = next_gc;
+ if (time_before(expires, now))
+ expires = now + HZ;
+
+ Y_INIT_TIMER(&timer);
+ timer.expires = expires + 1;
+ timer.data = (unsigned long)current;
+ timer.function = yaffs_background_waker;
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_timer(&timer);
+ schedule();
+ del_timer_sync(&timer);
+#else
+ msleep(10);
+#endif
+ }
+
+ return 0;
+}
+
+static int yaffs_bg_start(struct yaffs_dev *dev)
+{
+ int retval = 0;
+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
+
+ if (dev->read_only)
+ return -1;
+
+ context->bg_running = 1;
+
+ context->bg_thread = kthread_run(yaffs_bg_thread_fn,
+ (void *)dev, "yaffs-bg-%d",
+ context->mount_id);
+
+ if (IS_ERR(context->bg_thread)) {
+ retval = PTR_ERR(context->bg_thread);
+ context->bg_thread = NULL;
+ context->bg_running = 0;
+ }
+ return retval;
+}
+
+static void yaffs_bg_stop(struct yaffs_dev *dev)
+{
+ struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev);
+
+ ctxt->bg_running = 0;
+
+ if (ctxt->bg_thread) {
+ kthread_stop(ctxt->bg_thread);
+ ctxt->bg_thread = NULL;
+ }
+}
+#else
+static int yaffs_bg_thread_fn(void *data)
+{
+ return 0;
+}
+
+static int yaffs_bg_start(struct yaffs_dev *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 void yaffs_bg_stop(struct yaffs_dev *dev)
+{
+}
+#endif
+
+
+static void yaffs_flush_inodes(struct super_block *sb)
+{
+ struct inode *iptr;
+ struct yaffs_obj *obj;
+
+ list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {
+ obj = yaffs_inode_to_obj(iptr);
+ if (obj) {
+ yaffs_trace(YAFFS_TRACE_OS,
+ "flushing obj %d",
+ obj->obj_id);
+ yaffs_flush_file(obj, 1, 0);
+ }
+ }
+}
+
+static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
+{
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+ if (!dev)
+ return;
+
+ yaffs_flush_inodes(sb);
+ yaffs_update_dirty_dirs(dev);
+ yaffs_flush_whole_cache(dev);
+ if (do_checkpoint)
+ yaffs_checkpoint_save(dev);
+}
+
+static LIST_HEAD(yaffs_context_list);
+struct mutex yaffs_context_lock;
+
+static void yaffs_put_super(struct super_block *sb)
{
- struct yaffs_dev *dev;
- int ret_val = YAFFS_FAIL;
- struct yaffs_obj *target;
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
- dev = yaffs_inode_to_obj(old_dir)->my_dev;
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
+ "yaffs_put_super");
+
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
+ "Shutting down yaffs background thread");
+ yaffs_bg_stop(dev);
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
+ "yaffs background thread shut down");
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);
+ yaffs_flush_super(sb, 1);
- if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
- !list_empty(&target->variant.dir_variant.children)) {
+ yaffs_deinitialise(dev);
- yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
+ yaffs_gross_unlock(dev);
- ret_val = YAFFS_FAIL;
- } else {
- /* Now does unlinking internally using shadowing mechanism */
- yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
+ mutex_lock(&yaffs_context_lock);
+ list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
+ mutex_unlock(&yaffs_context_lock);
- 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);
+ if (yaffs_dev_to_lc(dev)->spare_buffer) {
+ kfree(yaffs_dev_to_lc(dev)->spare_buffer);
+ yaffs_dev_to_lc(dev)->spare_buffer = NULL;
}
- yaffs_gross_unlock(dev);
- if (ret_val == YAFFS_OK) {
- if (target)
- inode_dec_link_count(new_dentry->d_inode);
+ kfree(dev);
- update_dir_time(old_dir);
- if (old_dir != new_dir)
- update_dir_time(new_dir);
- return 0;
- } else {
- return -ENOTEMPTY;
- }
+ yaffs_put_mtd_device(mtd);
+
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
+ "yaffs_put_super done");
}
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+
+static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- struct yaffs_dev *dev;
+ return yaffs_gc_control;
+}
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_setattr of object %d",
- yaffs_inode_to_obj(inode)->obj_id);
-#if 0
- /* Fail if a requested resize >= 2GB */
- if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
- error = -EINVAL;
-#endif
- if (error == 0)
- error = inode_change_ok(inode, attr);
- if (error == 0) {
- int result;
- if (!error) {
- error = yaffs_vfs_setattr(inode, attr);
- yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
- if (attr->ia_valid & ATTR_SIZE) {
- yaffs_vfs_setsize(inode, attr->ia_size);
- inode->i_blocks = (inode->i_size + 511) >> 9;
- }
- }
- dev = yaffs_inode_to_obj(inode)->my_dev;
- if (attr->ia_valid & ATTR_SIZE) {
- yaffs_trace(YAFFS_TRACE_OS,
- "resize to %d(%x)",
- (int)(attr->ia_size),
- (int)(attr->ia_size));
- }
- yaffs_gross_lock(dev);
- result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
- if (result == YAFFS_OK) {
- error = 0;
- } else {
- error = -EPERM;
- }
- yaffs_gross_unlock(dev);
+#ifdef YAFFS_COMPILE_EXPORTFS
- }
+static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
+ uint32_t generation)
+{
+ return Y_IGET(sb, ino);
+}
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
+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);
+}
- return error;
+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);
}
-static int yaffs_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+struct dentry *yaffs2_get_parent(struct dentry *dentry)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- 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);
+ 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;
- 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);
+ 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 = 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);
+ }
+ }
+ }
}
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
- return error;
+ return parent;
}
-static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name,
- void *buff, size_t size)
+/* 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,
+};
+
+#endif
+
+static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
+ /* 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);
+}
+
+#ifdef YAFFS_HAS_EVICT_INODE
+/* yaffs_evict_inode combines into one operation what was previously done in
+ * yaffs_clear_inode() and yaffs_delete_inode()
+ *
+ */
+static void yaffs_evict_inode(struct inode *inode)
+{
+ struct yaffs_obj *obj;
struct yaffs_dev *dev;
- struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+ int deleteme = 0;
+
+ obj = yaffs_inode_to_obj(inode);
yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_getxattr \"%s\" from object %d",
- name, obj->obj_id);
+ "yaffs_evict_inode: ino %d, count %d %s",
+ (int)inode->i_ino, atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object");
- if (error == 0) {
+ if (!inode->i_nlink && !is_bad_inode(inode))
+ deleteme = 1;
+ truncate_inode_pages(&inode->i_data, 0);
+ Y_CLEAR_INODE(inode);
+
+ if (deleteme && obj) {
dev = obj->my_dev;
yaffs_gross_lock(dev);
- error = yaffs_get_xattrib(obj, name, buff, size);
+ 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);
-
}
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
-
- return error;
}
+#else
-static int yaffs_removexattr(struct dentry *dentry, const char *name)
+/* clear is called to tell the fs to release any per-inode data it holds.
+ * The object might still exist on disk and is just being thrown out of the cache
+ * or else the object has actually been deleted and we're being called via
+ * the chain
+ * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
+ */
+
+static void yaffs_clear_inode(struct inode *inode)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
+ struct yaffs_obj *obj;
struct yaffs_dev *dev;
- struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+
+ obj = yaffs_inode_to_obj(inode);
yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_removexattr of object %d", obj->obj_id);
+ "yaffs_clear_inode: ino %d, count %d %s",
+ (int)inode->i_ino, atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object");
- if (error == 0) {
- int result;
+ if (obj) {
dev = obj->my_dev;
yaffs_gross_lock(dev);
- result = yaffs_remove_xattrib(obj, name);
- if (result == YAFFS_OK)
- error = 0;
- else if (result < 0)
- error = result;
+ yaffs_unstitch_obj(inode, obj);
yaffs_gross_unlock(dev);
-
}
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_removexattr done returning %d", error);
- return error;
}
-static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
+/* delete is called when the link count is zero and the inode
+ * is put (ie. nobody wants to know about it anymore, time to
+ * delete the file).
+ * NB Must call clear_inode()
+ */
+static void yaffs_delete_inode(struct inode *inode)
{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- struct yaffs_dev *dev;
struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
+ struct yaffs_dev *dev;
yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_listxattr of object %d", obj->obj_id);
+ "yaffs_delete_inode: ino %d, count %d %s",
+ (int)inode->i_ino, atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object");
- if (error == 0) {
+ if (obj) {
dev = obj->my_dev;
yaffs_gross_lock(dev);
- error = yaffs_list_xattrib(obj, buff, size);
+ yaffs_del_obj(obj);
yaffs_gross_unlock(dev);
-
}
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_listxattr done returning %d", error);
-
- return error;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+ truncate_inode_pages(&inode->i_data, 0);
+#endif
+ clear_inode(inode);
}
+#endif
+
+
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
bytes_in_dev =
((uint64_t)
((dev->param.end_block - dev->param.start_block +
- 1))) * ((uint64_t) (dev->param.chunks_per_block *
- dev->data_bytes_per_chunk));
-
- do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */
- buf->f_blocks = bytes_in_dev;
-
- bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) *
- ((uint64_t) (dev->data_bytes_per_chunk));
-
- do_div(bytes_free, sb->s_blocksize);
-
- buf->f_bfree = bytes_free;
-
- } else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
-
- buf->f_blocks =
- (dev->param.end_block - dev->param.start_block + 1) *
- dev->param.chunks_per_block /
- (sb->s_blocksize / dev->data_bytes_per_chunk);
- buf->f_bfree =
- yaffs_get_n_free_chunks(dev) /
- (sb->s_blocksize / dev->data_bytes_per_chunk);
- } else {
- buf->f_blocks =
- (dev->param.end_block - dev->param.start_block + 1) *
- dev->param.chunks_per_block *
- (dev->data_bytes_per_chunk / sb->s_blocksize);
-
- buf->f_bfree =
- yaffs_get_n_free_chunks(dev) *
- (dev->data_bytes_per_chunk / sb->s_blocksize);
- }
-
- buf->f_files = 0;
- buf->f_ffree = 0;
- buf->f_bavail = buf->f_bfree;
-
- yaffs_gross_unlock(dev);
- return 0;
-}
-
-static void yaffs_flush_inodes(struct super_block *sb)
-{
- struct inode *iptr;
- struct yaffs_obj *obj;
-
- list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {
- obj = yaffs_inode_to_obj(iptr);
- if (obj) {
- yaffs_trace(YAFFS_TRACE_OS,
- "flushing obj %d",
- obj->obj_id);
- yaffs_flush_file(obj, 1, 0);
- }
- }
-}
-
-static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
-{
- struct yaffs_dev *dev = yaffs_super_to_dev(sb);
- if (!dev)
- return;
-
- yaffs_flush_inodes(sb);
- yaffs_update_dirty_dirs(dev);
- yaffs_flush_whole_cache(dev);
- if (do_checkpoint)
- yaffs_checkpoint_save(dev);
-}
-
-static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev)
-{
- unsigned erased_chunks =
- dev->n_erased_blocks * dev->param.chunks_per_block;
- struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
- unsigned scattered = 0; /* Free chunks not in an erased block */
-
- if (erased_chunks < dev->n_free_chunks)
- scattered = (dev->n_free_chunks - erased_chunks);
-
- if (!context->bg_running)
- return 0;
- else if (scattered < (dev->param.chunks_per_block * 2))
- return 0;
- else if (erased_chunks > dev->n_free_chunks / 2)
- return 0;
- else if (erased_chunks > dev->n_free_chunks / 4)
- return 1;
- else
- return 2;
-}
-
-static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
-{
-
- struct yaffs_dev *dev = yaffs_super_to_dev(sb);
- unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
- unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
- int do_checkpoint;
-
- 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) ||
- oneshot_checkpoint) && !dev->is_checkpointed;
-
- if (sb->s_dirt || do_checkpoint) {
- yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
- sb->s_dirt = 0;
- if (oneshot_checkpoint)
- yaffs_auto_checkpoint &= ~4;
- }
- yaffs_gross_unlock(dev);
-
- return 0;
-}
-
-/*
- * yaffs background thread functions .
- * yaffs_bg_thread_fn() the thread function
- * yaffs_bg_start() launches the background thread.
- * yaffs_bg_stop() cleans up the background thread.
- *
- * NB:
- * The thread should only run after the yaffs is initialised
- * The thread should be stopped before yaffs is unmounted.
- * The thread should not do any writing while the fs is in read only.
- */
-
-#ifdef YAFFS_COMPILE_BACKGROUND
-
-void yaffs_background_waker(unsigned long data)
-{
- wake_up_process((struct task_struct *)data);
-}
-
-static int yaffs_bg_thread_fn(void *data)
-{
- struct yaffs_dev *dev = (struct yaffs_dev *)data;
- struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
- unsigned long now = jiffies;
- unsigned long next_dir_update = now;
- unsigned long next_gc = now;
- unsigned long expires;
- unsigned int urgency;
-
- int gc_result;
- struct timer_list timer;
-
- yaffs_trace(YAFFS_TRACE_BACKGROUND,
- "yaffs_background starting for dev %p", (void *)dev);
-
-#ifdef YAFFS_COMPILE_FREEZER
- set_freezable();
-#endif
- while (context->bg_running) {
- yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
-
- if (kthread_should_stop())
- break;
-
-#ifdef YAFFS_COMPILE_FREEZER
- if (try_to_freeze())
- continue;
-#endif
- yaffs_gross_lock(dev);
-
- now = jiffies;
-
- if (time_after(now, next_dir_update) && yaffs_bg_enable) {
- yaffs_update_dirty_dirs(dev);
- next_dir_update = now + HZ;
- }
-
- if (time_after(now, next_gc) && yaffs_bg_enable) {
- if (!dev->is_checkpointed) {
- urgency = yaffs_bg_gc_urgency(dev);
- gc_result = yaffs_bg_gc(dev, urgency);
- if (urgency > 1)
- next_gc = now + HZ / 20 + 1;
- else if (urgency > 0)
- next_gc = now + HZ / 10 + 1;
- else
- next_gc = now + HZ * 2;
- } else {
- /*
- * gc not running so set to next_dir_update
- * to cut down on wake ups
- */
- next_gc = next_dir_update;
- }
- }
- yaffs_gross_unlock(dev);
-#if 1
- expires = next_dir_update;
- if (time_before(next_gc, expires))
- expires = next_gc;
- if (time_before(expires, now))
- expires = now + HZ;
-
- Y_INIT_TIMER(&timer);
- timer.expires = expires + 1;
- timer.data = (unsigned long)current;
- timer.function = yaffs_background_waker;
+ 1))) * ((uint64_t) (dev->param.chunks_per_block *
+ dev->data_bytes_per_chunk));
- set_current_state(TASK_INTERRUPTIBLE);
- add_timer(&timer);
- schedule();
- del_timer_sync(&timer);
-#else
- msleep(10);
-#endif
- }
+ do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */
+ buf->f_blocks = bytes_in_dev;
- return 0;
-}
+ bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) *
+ ((uint64_t) (dev->data_bytes_per_chunk));
-static int yaffs_bg_start(struct yaffs_dev *dev)
-{
- int retval = 0;
- struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
+ do_div(bytes_free, sb->s_blocksize);
- if (dev->read_only)
- return -1;
+ buf->f_bfree = bytes_free;
- context->bg_running = 1;
+ } else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
- context->bg_thread = kthread_run(yaffs_bg_thread_fn,
- (void *)dev, "yaffs-bg-%d",
- context->mount_id);
+ buf->f_blocks =
+ (dev->param.end_block - dev->param.start_block + 1) *
+ dev->param.chunks_per_block /
+ (sb->s_blocksize / dev->data_bytes_per_chunk);
+ buf->f_bfree =
+ yaffs_get_n_free_chunks(dev) /
+ (sb->s_blocksize / dev->data_bytes_per_chunk);
+ } else {
+ buf->f_blocks =
+ (dev->param.end_block - dev->param.start_block + 1) *
+ dev->param.chunks_per_block *
+ (dev->data_bytes_per_chunk / sb->s_blocksize);
- if (IS_ERR(context->bg_thread)) {
- retval = PTR_ERR(context->bg_thread);
- context->bg_thread = NULL;
- context->bg_running = 0;
+ buf->f_bfree =
+ yaffs_get_n_free_chunks(dev) *
+ (dev->data_bytes_per_chunk / sb->s_blocksize);
}
- return retval;
+
+ buf->f_files = 0;
+ buf->f_ffree = 0;
+ buf->f_bavail = buf->f_bfree;
+
+ yaffs_gross_unlock(dev);
+ return 0;
}
-static void yaffs_bg_stop(struct yaffs_dev *dev)
+
+
+static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
{
- struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev);
- ctxt->bg_running = 0;
+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+ unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
+ unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
+ int do_checkpoint;
+ int dirty = yaffs_check_super_dirty(dev);
- if (ctxt->bg_thread) {
- kthread_stop(ctxt->bg_thread);
- ctxt->bg_thread = NULL;
+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
+ "yaffs_do_sync_fs: gc-urgency %d %s %s%s",
+ gc_urgent,
+ dirty ? "dirty" : "clean",
+ request_checkpoint ? "checkpoint requested" : "no checkpoint",
+ oneshot_checkpoint ? " one-shot" : "");
+
+ yaffs_gross_lock(dev);
+ do_checkpoint = ((request_checkpoint && !gc_urgent) ||
+ oneshot_checkpoint) && !dev->is_checkpointed;
+
+ if (dirty || do_checkpoint) {
+ yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
+ yaffs_clear_super_dirty(dev);
+ if (oneshot_checkpoint)
+ yaffs_auto_checkpoint &= ~4;
}
-}
-#else
-static int yaffs_bg_thread_fn(void *data)
-{
- return 0;
-}
+ yaffs_gross_unlock(dev);
-static int yaffs_bg_start(struct yaffs_dev *dev)
-{
return 0;
}
-static void yaffs_bg_stop(struct yaffs_dev *dev)
-{
-}
-#endif
+#ifdef YAFFS_HAS_WRITE_SUPER
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
static void yaffs_write_super(struct super_block *sb)
#else
return 0;
#endif
}
+#endif
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
static int yaffs_sync_fs(struct super_block *sb, int wait)
return 0;
}
-#ifdef YAFFS_USE_OWN_IGET
-
-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);
-
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", 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 const struct super_operations yaffs_super_ops = {
+ .statfs = yaffs_statfs,
+#ifndef YAFFS_USE_OWN_IGET
+ .read_inode = yaffs_read_inode,
+#endif
+#ifdef YAFFS_HAS_PUT_INODE
+ .put_inode = yaffs_put_inode,
+#endif
+ .put_super = yaffs_put_super,
+#ifdef YAFFS_HAS_EVICT_INODE
+ .evict_inode = yaffs_evict_inode,
#else
-
-static void yaffs_read_inode(struct inode *inode)
-{
- /* NB This is called as a side effect of other functions, but
- * we had to release the lock to prevent deadlocks, so
- * need to lock again.
- */
-
- struct yaffs_obj *obj;
- struct yaffs_dev *dev = yaffs_super_to_dev(inode->i_sb);
-
- yaffs_trace(YAFFS_TRACE_OS,
- "yaffs_read_inode for %d", (int)inode->i_ino);
-
- if (current != yaffs_dev_to_lc(dev)->readdir_process)
- yaffs_gross_lock(dev);
-
- obj = yaffs_find_by_number(dev, inode->i_ino);
-
- yaffs_fill_inode_from_obj(inode, obj);
-
- if (current != yaffs_dev_to_lc(dev)->readdir_process)
- yaffs_gross_unlock(dev);
-}
-
+ .delete_inode = yaffs_delete_inode,
+ .clear_inode = yaffs_clear_inode,
#endif
-
-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);
- struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-
- yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
- "yaffs_put_super");
-
- yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
- "Shutting down yaffs background thread");
- yaffs_bg_stop(dev);
- yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
- "yaffs background thread shut down");
-
- yaffs_gross_lock(dev);
-
- yaffs_flush_super(sb, 1);
-
- 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);
-
- yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
- "yaffs_put_super done");
-}
-
-
-static void yaffs_touch_super(struct yaffs_dev *dev)
-{
- struct super_block *sb = yaffs_dev_to_lc(dev)->super;
-
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_touch_super() sb = %p", sb);
- if (sb)
- sb->s_dirt = 1;
-}
+ .sync_fs = yaffs_sync_fs,
+#ifdef YAFFS_HAS_WRITE_SUPER
+ .write_super = yaffs_write_super,
+#endif
+};
struct yaffs_options {
int inband_tags;
return error;
}
+
+static struct dentry *yaffs_make_root(struct inode *inode)
+{
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
+ struct dentry *root = d_alloc_root(inode);
+
+ if (!root)
+ iput(inode);
+
+ return root;
+#else
+ return d_make_root(inode);
+#endif
+}
+
+
+
+
static struct super_block *yaffs_internal_read_super(int yaffs_version,
struct super_block *sb,
void *data, int silent)
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)
- return NULL; /* This isn't an mtd device */
-
/* Get the device */
mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
if (!mtd) {
yaffs_trace(YAFFS_TRACE_ALWAYS,
- "yaffs: MTD device #%u doesn't appear to exist",
+ "yaffs: MTD device %u either not valid or unavailable",
MINOR(sb->s_dev));
return NULL;
}
- /* Check it's NAND */
- if (mtd->type != MTD_NANDFLASH) {
- yaffs_trace(YAFFS_TRACE_ALWAYS,
- "yaffs: MTD device is not NAND it's type %d",
- mtd->type);
- return NULL;
- }
-
- 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, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd));
- yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
- yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
- yaffs_trace(YAFFS_TRACE_OS, " size %u", mtd->size);
-#else
- yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
-#endif
if (yaffs_auto_select && yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2");
yaffs_version = 1;
}
- if (yaffs_version == 2) {
- /* Check for version 2 style functions */
- if (!mtd->erase ||
- !mtd->block_isbad ||
- !mtd->block_markbad || !mtd->read || !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- !mtd->read_oob || !mtd->write_oob) {
-#else
- !mtd->write_ecc ||
- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
-#endif
- yaffs_trace(YAFFS_TRACE_ALWAYS,
- "MTD device does not support required functions"
- );
- return NULL;
- }
-
- if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
- mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
- !options.inband_tags) {
- yaffs_trace(YAFFS_TRACE_ALWAYS,
- "MTD device does not have the right page sizes"
- );
- return NULL;
- }
- } else {
- /* Check for V1 style functions */
- if (!mtd->erase || !mtd->read || !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- !mtd->read_oob || !mtd->write_oob) {
-#else
- !mtd->write_ecc ||
- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
-#endif
- yaffs_trace(YAFFS_TRACE_ALWAYS,
- "MTD device does not support required functions"
- );
- return NULL;
- }
-
- if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
- mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
- yaffs_trace(YAFFS_TRACE_ALWAYS,
- "MTD device does not support have the right page sizes"
- );
- return NULL;
- }
- }
+ if(yaffs_verify_mtd(mtd, yaffs_version, options.inband_tags) < 0)
+ return NULL;
/* OK, so if we got here, we have an MTD that's NAND and looks
* like it has the right capabilities
yaffs_mtd_drv_install(dev);
- param->sb_dirty_fn = yaffs_touch_super;
+ param->sb_dirty_fn = yaffs_set_super_dirty;
param->gc_control_fn = yaffs_gc_control_callback;
yaffs_dev_to_lc(dev)->super = sb;
yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode");
- root = d_alloc_root(inode);
-
- yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: d_alloc_root done");
+ root = yaffs_make_root(inode);
- if (!root) {
- iput(inode);
+ if (!root)
return NULL;
- }
+
sb->s_root = root;
- sb->s_dirt = !dev->is_checkpointed;
+ if(!dev->is_checkpointed)
+ yaffs_set_super_dirty(dev);
+
yaffs_trace(YAFFS_TRACE_ALWAYS,
"yaffs_read_super: is_checkpointed %d",
dev->is_checkpointed);
projects / yaffs2.git / commitdiff