Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/jffs/inode-v23.c b/fs/jffs/inode-v23.c
new file mode 100644
index 0000000..bfbeb4c
--- /dev/null
+++ b/fs/jffs/inode-v23.c
@@ -0,0 +1,1847 @@
+/*
+ * JFFS -- Journalling Flash File System, Linux implementation.
+ *
+ * Copyright (C) 1999, 2000 Axis Communications AB.
+ *
+ * Created by Finn Hakansson <finn@axis.com>.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * $Id: inode-v23.c,v 1.70 2001/10/02 09:16:02 dwmw2 Exp $
+ *
+ * Ported to Linux 2.3.x and MTD:
+ * Copyright (C) 2000 Alexander Larsson (alex@cendio.se), Cendio Systems AB
+ *
+ * Copyright 2000, 2001 Red Hat, Inc.
+ */
+
+/* inode.c -- Contains the code that is called from the VFS. */
+
+/* TODO-ALEX:
+ * uid and gid are just 16 bit.
+ * jffs_file_write reads from user-space pointers without xx_from_user
+ * maybe other stuff do to.
+ */
+
+#include <linux/time.h>
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/jffs.h>
+#include <linux/fs.h>
+#include <linux/smp_lock.h>
+#include <linux/ioctl.h>
+#include <linux/stat.h>
+#include <linux/blkdev.h>
+#include <linux/quotaops.h>
+#include <linux/highmem.h>
+#include <linux/vfs.h>
+#include <asm/semaphore.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+
+#include "jffs_fm.h"
+#include "intrep.h"
+#ifdef CONFIG_JFFS_PROC_FS
+#include "jffs_proc.h"
+#endif
+
+static int jffs_remove(struct inode *dir, struct dentry *dentry, int type);
+
+static struct super_operations jffs_ops;
+static struct file_operations jffs_file_operations;
+static struct inode_operations jffs_file_inode_operations;
+static struct file_operations jffs_dir_operations;
+static struct inode_operations jffs_dir_inode_operations;
+static struct address_space_operations jffs_address_operations;
+
+kmem_cache_t *node_cache = NULL;
+kmem_cache_t *fm_cache = NULL;
+
+/* Called by the VFS at mount time to initialize the whole file system. */
+static int jffs_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct inode *root_inode;
+ struct jffs_control *c;
+
+ sb->s_flags |= MS_NODIRATIME;
+
+ D1(printk(KERN_NOTICE "JFFS: Trying to mount device %s.\n",
+ sb->s_id));
+
+ if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) {
+ printk(KERN_WARNING "JFFS: Trying to mount a "
+ "non-mtd device.\n");
+ return -EINVAL;
+ }
+
+ sb->s_blocksize = PAGE_CACHE_SIZE;
+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+ sb->s_fs_info = (void *) 0;
+ sb->s_maxbytes = 0xFFFFFFFF;
+
+ /* Build the file system. */
+ if (jffs_build_fs(sb) < 0) {
+ goto jffs_sb_err1;
+ }
+
+ /*
+ * set up enough so that we can read an inode
+ */
+ sb->s_magic = JFFS_MAGIC_SB_BITMASK;
+ sb->s_op = &jffs_ops;
+
+ root_inode = iget(sb, JFFS_MIN_INO);
+ if (!root_inode)
+ goto jffs_sb_err2;
+
+ /* Get the root directory of this file system. */
+ if (!(sb->s_root = d_alloc_root(root_inode))) {
+ goto jffs_sb_err3;
+ }
+
+ c = (struct jffs_control *) sb->s_fs_info;
+
+#ifdef CONFIG_JFFS_PROC_FS
+ /* Set up the jffs proc file system. */
+ if (jffs_register_jffs_proc_dir(MINOR(sb->s_dev), c) < 0) {
+ printk(KERN_WARNING "JFFS: Failed to initialize the JFFS "
+ "proc file system for device %s.\n",
+ sb->s_id);
+ }
+#endif
+
+ /* Set the Garbage Collection thresholds */
+
+ /* GC if free space goes below 5% of the total size */
+ c->gc_minfree_threshold = c->fmc->flash_size / 20;
+
+ if (c->gc_minfree_threshold < c->fmc->sector_size)
+ c->gc_minfree_threshold = c->fmc->sector_size;
+
+ /* GC if dirty space exceeds 33% of the total size. */
+ c->gc_maxdirty_threshold = c->fmc->flash_size / 3;
+
+ if (c->gc_maxdirty_threshold < c->fmc->sector_size)
+ c->gc_maxdirty_threshold = c->fmc->sector_size;
+
+
+ c->thread_pid = kernel_thread (jffs_garbage_collect_thread,
+ (void *) c,
+ CLONE_KERNEL);
+ D1(printk(KERN_NOTICE "JFFS: GC thread pid=%d.\n", (int) c->thread_pid));
+
+ D1(printk(KERN_NOTICE "JFFS: Successfully mounted device %s.\n",
+ sb->s_id));
+ return 0;
+
+jffs_sb_err3:
+ iput(root_inode);
+jffs_sb_err2:
+ jffs_cleanup_control((struct jffs_control *)sb->s_fs_info);
+jffs_sb_err1:
+ printk(KERN_WARNING "JFFS: Failed to mount device %s.\n",
+ sb->s_id);
+ return -EINVAL;
+}
+
+
+/* This function is called when the file system is umounted. */
+static void
+jffs_put_super(struct super_block *sb)
+{
+ struct jffs_control *c = (struct jffs_control *) sb->s_fs_info;
+
+ D2(printk("jffs_put_super()\n"));
+
+#ifdef CONFIG_JFFS_PROC_FS
+ jffs_unregister_jffs_proc_dir(c);
+#endif
+
+ if (c->gc_task) {
+ D1(printk (KERN_NOTICE "jffs_put_super(): Telling gc thread to die.\n"));
+ send_sig(SIGKILL, c->gc_task, 1);
+ }
+ wait_for_completion(&c->gc_thread_comp);
+
+ D1(printk (KERN_NOTICE "jffs_put_super(): Successfully waited on thread.\n"));
+
+ jffs_cleanup_control((struct jffs_control *)sb->s_fs_info);
+ D1(printk(KERN_NOTICE "JFFS: Successfully unmounted device %s.\n",
+ sb->s_id));
+}
+
+
+/* This function is called when user commands like chmod, chgrp and
+ chown are executed. System calls like trunc() results in a call
+ to this function. */
+static int
+jffs_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+ struct inode *inode = dentry->d_inode;
+ struct jffs_raw_inode raw_inode;
+ struct jffs_control *c;
+ struct jffs_fmcontrol *fmc;
+ struct jffs_file *f;
+ struct jffs_node *new_node;
+ int update_all;
+ int res = 0;
+ int recoverable = 0;
+
+ lock_kernel();
+
+ if ((res = inode_change_ok(inode, iattr)))
+ goto out;
+
+ c = (struct jffs_control *)inode->i_sb->s_fs_info;
+ fmc = c->fmc;
+
+ D3(printk (KERN_NOTICE "notify_change(): down biglock\n"));
+ down(&fmc->biglock);
+
+ f = jffs_find_file(c, inode->i_ino);
+
+ ASSERT(if (!f) {
+ printk("jffs_setattr(): Invalid inode number: %lu\n",
+ inode->i_ino);
+ D3(printk (KERN_NOTICE "notify_change(): up biglock\n"));
+ up(&fmc->biglock);
+ res = -EINVAL;
+ goto out;
+ });
+
+ D1(printk("***jffs_setattr(): file: \"%s\", ino: %u\n",
+ f->name, f->ino));
+
+ update_all = iattr->ia_valid & ATTR_FORCE;
+
+ if ( (update_all || iattr->ia_valid & ATTR_SIZE)
+ && (iattr->ia_size + 128 < f->size) ) {
+ /* We're shrinking the file by more than 128 bytes.
+ We'll be able to GC and recover this space, so
+ allow it to go into the reserved space. */
+ recoverable = 1;
+ }
+
+ if (!(new_node = jffs_alloc_node())) {
+ D(printk("jffs_setattr(): Allocation failed!\n"));
+ D3(printk (KERN_NOTICE "notify_change(): up biglock\n"));
+ up(&fmc->biglock);
+ res = -ENOMEM;
+ goto out;
+ }
+
+ new_node->data_offset = 0;
+ new_node->removed_size = 0;
+ raw_inode.magic = JFFS_MAGIC_BITMASK;
+ raw_inode.ino = f->ino;
+ raw_inode.pino = f->pino;
+ raw_inode.mode = f->mode;
+ raw_inode.uid = f->uid;
+ raw_inode.gid = f->gid;
+ raw_inode.atime = f->atime;
+ raw_inode.mtime = f->mtime;
+ raw_inode.ctime = f->ctime;
+ raw_inode.dsize = 0;
+ raw_inode.offset = 0;
+ raw_inode.rsize = 0;
+ raw_inode.dsize = 0;
+ raw_inode.nsize = f->nsize;
+ raw_inode.nlink = f->nlink;
+ raw_inode.spare = 0;
+ raw_inode.rename = 0;
+ raw_inode.deleted = 0;
+
+ if (update_all || iattr->ia_valid & ATTR_MODE) {
+ raw_inode.mode = iattr->ia_mode;
+ inode->i_mode = iattr->ia_mode;
+ }
+ if (update_all || iattr->ia_valid & ATTR_UID) {
+ raw_inode.uid = iattr->ia_uid;
+ inode->i_uid = iattr->ia_uid;
+ }
+ if (update_all || iattr->ia_valid & ATTR_GID) {
+ raw_inode.gid = iattr->ia_gid;
+ inode->i_gid = iattr->ia_gid;
+ }
+ if (update_all || iattr->ia_valid & ATTR_SIZE) {
+ int len;
+ D1(printk("jffs_notify_change(): Changing size "
+ "to %lu bytes!\n", (long)iattr->ia_size));
+ raw_inode.offset = iattr->ia_size;
+
+ /* Calculate how many bytes need to be removed from
+ the end. */
+ if (f->size < iattr->ia_size) {
+ len = 0;
+ }
+ else {
+ len = f->size - iattr->ia_size;
+ }
+
+ raw_inode.rsize = len;
+
+ /* The updated node will be a removal node, with
+ base at the new size and size of the nbr of bytes
+ to be removed. */
+ new_node->data_offset = iattr->ia_size;
+ new_node->removed_size = len;
+ inode->i_size = iattr->ia_size;
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+
+ if (len) {
+ invalidate_inode_pages(inode->i_mapping);
+ }
+ inode->i_ctime = CURRENT_TIME_SEC;
+ inode->i_mtime = inode->i_ctime;
+ }
+ if (update_all || iattr->ia_valid & ATTR_ATIME) {
+ raw_inode.atime = iattr->ia_atime.tv_sec;
+ inode->i_atime = iattr->ia_atime;
+ }
+ if (update_all || iattr->ia_valid & ATTR_MTIME) {
+ raw_inode.mtime = iattr->ia_mtime.tv_sec;
+ inode->i_mtime = iattr->ia_mtime;
+ }
+ if (update_all || iattr->ia_valid & ATTR_CTIME) {
+ raw_inode.ctime = iattr->ia_ctime.tv_sec;
+ inode->i_ctime = iattr->ia_ctime;
+ }
+
+ /* Write this node to the flash. */
+ if ((res = jffs_write_node(c, new_node, &raw_inode, f->name, NULL, recoverable, f)) < 0) {
+ D(printk("jffs_notify_change(): The write failed!\n"));
+ jffs_free_node(new_node);
+ D3(printk (KERN_NOTICE "n_c(): up biglock\n"));
+ up(&c->fmc->biglock);
+ goto out;
+ }
+
+ jffs_insert_node(c, f, &raw_inode, NULL, new_node);
+
+ mark_inode_dirty(inode);
+ D3(printk (KERN_NOTICE "n_c(): up biglock\n"));
+ up(&c->fmc->biglock);
+out:
+ unlock_kernel();
+ return res;
+} /* jffs_notify_change() */
+
+
+static struct inode *
+jffs_new_inode(const struct inode * dir, struct jffs_raw_inode *raw_inode,
+ int * err)
+{
+ struct super_block * sb;
+ struct inode * inode;
+ struct jffs_control *c;
+ struct jffs_file *f;
+
+ sb = dir->i_sb;
+ inode = new_inode(sb);
+ if (!inode) {
+ *err = -ENOMEM;
+ return NULL;
+ }
+
+ c = (struct jffs_control *)sb->s_fs_info;
+
+ inode->i_ino = raw_inode->ino;
+ inode->i_mode = raw_inode->mode;
+ inode->i_nlink = raw_inode->nlink;
+ inode->i_uid = raw_inode->uid;
+ inode->i_gid = raw_inode->gid;
+ inode->i_size = raw_inode->dsize;
+ inode->i_atime.tv_sec = raw_inode->atime;
+ inode->i_mtime.tv_sec = raw_inode->mtime;
+ inode->i_ctime.tv_sec = raw_inode->ctime;
+ inode->i_ctime.tv_nsec = 0;
+ inode->i_mtime.tv_nsec = 0;
+ inode->i_atime.tv_nsec = 0;
+ inode->i_blksize = PAGE_SIZE;
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+
+ f = jffs_find_file(c, raw_inode->ino);
+
+ inode->u.generic_ip = (void *)f;
+ insert_inode_hash(inode);
+
+ return inode;
+}
+
+/* Get statistics of the file system. */
+static int
+jffs_statfs(struct super_block *sb, struct kstatfs *buf)
+{
+ struct jffs_control *c = (struct jffs_control *) sb->s_fs_info;
+ struct jffs_fmcontrol *fmc;
+
+ lock_kernel();
+
+ fmc = c->fmc;
+
+ D2(printk("jffs_statfs()\n"));
+
+ buf->f_type = JFFS_MAGIC_SB_BITMASK;
+ buf->f_bsize = PAGE_CACHE_SIZE;
+ buf->f_blocks = (fmc->flash_size / PAGE_CACHE_SIZE)
+ - (fmc->min_free_size / PAGE_CACHE_SIZE);
+ buf->f_bfree = (jffs_free_size1(fmc) + jffs_free_size2(fmc) +
+ fmc->dirty_size - fmc->min_free_size)
+ >> PAGE_CACHE_SHIFT;
+ buf->f_bavail = buf->f_bfree;
+
+ /* Find out how many files there are in the filesystem. */
+ buf->f_files = jffs_foreach_file(c, jffs_file_count);
+ buf->f_ffree = buf->f_bfree;
+ /* buf->f_fsid = 0; */
+ buf->f_namelen = JFFS_MAX_NAME_LEN;
+
+ unlock_kernel();
+
+ return 0;
+}
+
+
+/* Rename a file. */
+static int
+jffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct jffs_raw_inode raw_inode;
+ struct jffs_control *c;
+ struct jffs_file *old_dir_f;
+ struct jffs_file *new_dir_f;
+ struct jffs_file *del_f;
+ struct jffs_file *f;
+ struct jffs_node *node;
+ struct inode *inode;
+ int result = 0;
+ __u32 rename_data = 0;
+
+ D2(printk("***jffs_rename()\n"));
+
+ D(printk("jffs_rename(): old_dir: 0x%p, old name: 0x%p, "
+ "new_dir: 0x%p, new name: 0x%p\n",
+ old_dir, old_dentry->d_name.name,
+ new_dir, new_dentry->d_name.name));
+
+ lock_kernel();
+ c = (struct jffs_control *)old_dir->i_sb->s_fs_info;
+ ASSERT(if (!c) {
+ printk(KERN_ERR "jffs_rename(): The old_dir inode "
+ "didn't have a reference to a jffs_file struct\n");
+ unlock_kernel();
+ return -EIO;
+ });
+
+ result = -ENOTDIR;
+ if (!(old_dir_f = (struct jffs_file *)old_dir->u.generic_ip)) {
+ D(printk("jffs_rename(): Old dir invalid.\n"));
+ goto jffs_rename_end;
+ }
+
+ /* Try to find the file to move. */
+ result = -ENOENT;
+ if (!(f = jffs_find_child(old_dir_f, old_dentry->d_name.name,
+ old_dentry->d_name.len))) {
+ goto jffs_rename_end;
+ }
+
+ /* Find the new directory. */
+ result = -ENOTDIR;
+ if (!(new_dir_f = (struct jffs_file *)new_dir->u.generic_ip)) {
+ D(printk("jffs_rename(): New dir invalid.\n"));
+ goto jffs_rename_end;
+ }
+ D3(printk (KERN_NOTICE "rename(): down biglock\n"));
+ down(&c->fmc->biglock);
+ /* Create a node and initialize as much as needed. */
+ result = -ENOMEM;
+ if (!(node = jffs_alloc_node())) {
+ D(printk("jffs_rename(): Allocation failed: node == 0\n"));
+ goto jffs_rename_end;
+ }
+ node->data_offset = 0;
+ node->removed_size = 0;
+
+ /* Initialize the raw inode. */
+ raw_inode.magic = JFFS_MAGIC_BITMASK;
+ raw_inode.ino = f->ino;
+ raw_inode.pino = new_dir_f->ino;
+/* raw_inode.version = f->highest_version + 1; */
+ raw_inode.mode = f->mode;
+ raw_inode.uid = current->fsuid;
+ raw_inode.gid = current->fsgid;
+#if 0
+ raw_inode.uid = f->uid;
+ raw_inode.gid = f->gid;
+#endif
+ raw_inode.atime = get_seconds();
+ raw_inode.mtime = raw_inode.atime;
+ raw_inode.ctime = f->ctime;
+ raw_inode.offset = 0;
+ raw_inode.dsize = 0;
+ raw_inode.rsize = 0;
+ raw_inode.nsize = new_dentry->d_name.len;
+ raw_inode.nlink = f->nlink;
+ raw_inode.spare = 0;
+ raw_inode.rename = 0;
+ raw_inode.deleted = 0;
+
+ /* See if there already exists a file with the same name as
+ new_name. */
+ if ((del_f = jffs_find_child(new_dir_f, new_dentry->d_name.name,
+ new_dentry->d_name.len))) {
+ raw_inode.rename = 1;
+ raw_inode.dsize = sizeof(__u32);
+ rename_data = del_f->ino;
+ }
+
+ /* Write the new node to the flash memory. */
+ if ((result = jffs_write_node(c, node, &raw_inode,
+ new_dentry->d_name.name,
+ (unsigned char*)&rename_data, 0, f)) < 0) {
+ D(printk("jffs_rename(): Failed to write node to flash.\n"));
+ jffs_free_node(node);
+ goto jffs_rename_end;
+ }
+ raw_inode.dsize = 0;
+
+ if (raw_inode.rename) {
+ /* The file with the same name must be deleted. */
+ //FIXME deadlock down(&c->fmc->gclock);
+ if ((result = jffs_remove(new_dir, new_dentry,
+ del_f->mode)) < 0) {
+ /* This is really bad. */
+ printk(KERN_ERR "JFFS: An error occurred in "
+ "rename().\n");
+ }
+ // up(&c->fmc->gclock);
+ }
+
+ if (old_dir_f != new_dir_f) {
+ /* Remove the file from its old position in the
+ filesystem tree. */
+ jffs_unlink_file_from_tree(f);
+ }
+
+ /* Insert the new node into the file system. */
+ if ((result = jffs_insert_node(c, f, &raw_inode,
+ new_dentry->d_name.name, node)) < 0) {
+ D(printk(KERN_ERR "jffs_rename(): jffs_insert_node() "
+ "failed!\n"));
+ }
+
+ if (old_dir_f != new_dir_f) {
+ /* Insert the file to its new position in the
+ file system. */
+ jffs_insert_file_into_tree(f);
+ }
+
+ /* This is a kind of update of the inode we're about to make
+ here. This is what they do in ext2fs. Kind of. */
+ if ((inode = iget(new_dir->i_sb, f->ino))) {
+ inode->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
+ iput(inode);
+ }
+
+jffs_rename_end:
+ D3(printk (KERN_NOTICE "rename(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return result;
+} /* jffs_rename() */
+
+
+/* Read the contents of a directory. Used by programs like `ls'
+ for instance. */
+static int
+jffs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+ struct jffs_file *f;
+ struct dentry *dentry = filp->f_dentry;
+ struct inode *inode = dentry->d_inode;
+ struct jffs_control *c = (struct jffs_control *)inode->i_sb->s_fs_info;
+ int j;
+ int ddino;
+ lock_kernel();
+ D3(printk (KERN_NOTICE "readdir(): down biglock\n"));
+ down(&c->fmc->biglock);
+
+ D2(printk("jffs_readdir(): inode: 0x%p, filp: 0x%p\n", inode, filp));
+ if (filp->f_pos == 0) {
+ D3(printk("jffs_readdir(): \".\" %lu\n", inode->i_ino));
+ if (filldir(dirent, ".", 1, filp->f_pos, inode->i_ino, DT_DIR) < 0) {
+ D3(printk (KERN_NOTICE "readdir(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return 0;
+ }
+ filp->f_pos = 1;
+ }
+ if (filp->f_pos == 1) {
+ if (inode->i_ino == JFFS_MIN_INO) {
+ ddino = JFFS_MIN_INO;
+ }
+ else {
+ ddino = ((struct jffs_file *)
+ inode->u.generic_ip)->pino;
+ }
+ D3(printk("jffs_readdir(): \"..\" %u\n", ddino));
+ if (filldir(dirent, "..", 2, filp->f_pos, ddino, DT_DIR) < 0) {
+ D3(printk (KERN_NOTICE "readdir(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return 0;
+ }
+ filp->f_pos++;
+ }
+ f = ((struct jffs_file *)inode->u.generic_ip)->children;
+
+ j = 2;
+ while(f && (f->deleted || j++ < filp->f_pos )) {
+ f = f->sibling_next;
+ }
+
+ while (f) {
+ D3(printk("jffs_readdir(): \"%s\" ino: %u\n",
+ (f->name ? f->name : ""), f->ino));
+ if (filldir(dirent, f->name, f->nsize,
+ filp->f_pos , f->ino, DT_UNKNOWN) < 0) {
+ D3(printk (KERN_NOTICE "readdir(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return 0;
+ }
+ filp->f_pos++;
+ do {
+ f = f->sibling_next;
+ } while(f && f->deleted);
+ }
+ D3(printk (KERN_NOTICE "readdir(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return filp->f_pos;
+} /* jffs_readdir() */
+
+
+/* Find a file in a directory. If the file exists, return its
+ corresponding dentry. */
+static struct dentry *
+jffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+{
+ struct jffs_file *d;
+ struct jffs_file *f;
+ struct jffs_control *c = (struct jffs_control *)dir->i_sb->s_fs_info;
+ int len;
+ int r = 0;
+ const char *name;
+ struct inode *inode = NULL;
+
+ len = dentry->d_name.len;
+ name = dentry->d_name.name;
+
+ lock_kernel();
+
+ D3({
+ char *s = (char *)kmalloc(len + 1, GFP_KERNEL);
+ memcpy(s, name, len);
+ s[len] = '\0';
+ printk("jffs_lookup(): dir: 0x%p, name: \"%s\"\n", dir, s);
+ kfree(s);
+ });
+
+ D3(printk (KERN_NOTICE "lookup(): down biglock\n"));
+ down(&c->fmc->biglock);
+
+ r = -ENAMETOOLONG;
+ if (len > JFFS_MAX_NAME_LEN) {
+ goto jffs_lookup_end;
+ }
+
+ r = -EACCES;
+ if (!(d = (struct jffs_file *)dir->u.generic_ip)) {
+ D(printk("jffs_lookup(): No such inode! (%lu)\n",
+ dir->i_ino));
+ goto jffs_lookup_end;
+ }
+
+ /* Get the corresponding inode to the file. */
+
+ /* iget calls jffs_read_inode, so we need to drop the biglock
+ before calling iget. Unfortunately, the GC has a tendency
+ to sneak in here, because iget sometimes calls schedule ().
+ */
+
+ if ((len == 1) && (name[0] == '.')) {
+ D3(printk (KERN_NOTICE "lookup(): up biglock\n"));
+ up(&c->fmc->biglock);
+ if (!(inode = iget(dir->i_sb, d->ino))) {
+ D(printk("jffs_lookup(): . iget() ==> NULL\n"));
+ goto jffs_lookup_end_no_biglock;
+ }
+ D3(printk (KERN_NOTICE "lookup(): down biglock\n"));
+ down(&c->fmc->biglock);
+ } else if ((len == 2) && (name[0] == '.') && (name[1] == '.')) {
+ D3(printk (KERN_NOTICE "lookup(): up biglock\n"));
+ up(&c->fmc->biglock);
+ if (!(inode = iget(dir->i_sb, d->pino))) {
+ D(printk("jffs_lookup(): .. iget() ==> NULL\n"));
+ goto jffs_lookup_end_no_biglock;
+ }
+ D3(printk (KERN_NOTICE "lookup(): down biglock\n"));
+ down(&c->fmc->biglock);
+ } else if ((f = jffs_find_child(d, name, len))) {
+ D3(printk (KERN_NOTICE "lookup(): up biglock\n"));
+ up(&c->fmc->biglock);
+ if (!(inode = iget(dir->i_sb, f->ino))) {
+ D(printk("jffs_lookup(): iget() ==> NULL\n"));
+ goto jffs_lookup_end_no_biglock;
+ }
+ D3(printk (KERN_NOTICE "lookup(): down biglock\n"));
+ down(&c->fmc->biglock);
+ } else {
+ D3(printk("jffs_lookup(): Couldn't find the file. "
+ "f = 0x%p, name = \"%s\", d = 0x%p, d->ino = %u\n",
+ f, name, d, d->ino));
+ inode = NULL;
+ }
+
+ d_add(dentry, inode);
+ D3(printk (KERN_NOTICE "lookup(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return NULL;
+
+jffs_lookup_end:
+ D3(printk (KERN_NOTICE "lookup(): up biglock\n"));
+ up(&c->fmc->biglock);
+
+jffs_lookup_end_no_biglock:
+ unlock_kernel();
+ return ERR_PTR(r);
+} /* jffs_lookup() */
+
+
+/* Try to read a page of data from a file. */
+static int
+jffs_do_readpage_nolock(struct file *file, struct page *page)
+{
+ void *buf;
+ unsigned long read_len;
+ int result;
+ struct inode *inode = (struct inode*)page->mapping->host;
+ struct jffs_file *f = (struct jffs_file *)inode->u.generic_ip;
+ struct jffs_control *c = (struct jffs_control *)inode->i_sb->s_fs_info;
+ int r;
+ loff_t offset;
+
+ D2(printk("***jffs_readpage(): file = \"%s\", page->index = %lu\n",
+ (f->name ? f->name : ""), (long)page->index));
+
+ get_page(page);
+ /* Don't SetPageLocked(page), should be locked already */
+ ClearPageUptodate(page);
+ ClearPageError(page);
+
+ D3(printk (KERN_NOTICE "readpage(): down biglock\n"));
+ down(&c->fmc->biglock);
+
+ read_len = 0;
+ result = 0;
+ offset = page->index << PAGE_CACHE_SHIFT;
+
+ kmap(page);
+ buf = page_address(page);
+ if (offset < inode->i_size) {
+ read_len = min_t(long, inode->i_size - offset, PAGE_SIZE);
+ r = jffs_read_data(f, buf, offset, read_len);
+ if (r != read_len) {
+ result = -EIO;
+ D(
+ printk("***jffs_readpage(): Read error! "
+ "Wanted to read %lu bytes but only "
+ "read %d bytes.\n", read_len, r);
+ );
+ }
+
+ }
+
+ /* This handles the case of partial or no read in above */
+ if(read_len < PAGE_SIZE)
+ memset(buf + read_len, 0, PAGE_SIZE - read_len);
+ flush_dcache_page(page);
+ kunmap(page);
+
+ D3(printk (KERN_NOTICE "readpage(): up biglock\n"));
+ up(&c->fmc->biglock);
+
+ if (result) {
+ SetPageError(page);
+ }else {
+ SetPageUptodate(page);
+ }
+
+ page_cache_release(page);
+
+ D3(printk("jffs_readpage(): Leaving...\n"));
+
+ return result;
+} /* jffs_do_readpage_nolock() */
+
+static int jffs_readpage(struct file *file, struct page *page)
+{
+ int ret = jffs_do_readpage_nolock(file, page);
+ unlock_page(page);
+ return ret;
+}
+
+/* Create a new directory. */
+static int
+jffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+ struct jffs_raw_inode raw_inode;
+ struct jffs_control *c;
+ struct jffs_node *node;
+ struct jffs_file *dir_f;
+ struct inode *inode;
+ int dir_mode;
+ int result = 0;
+ int err;
+
+ D1({
+ int len = dentry->d_name.len;
+ char *_name = (char *) kmalloc(len + 1, GFP_KERNEL);
+ memcpy(_name, dentry->d_name.name, len);
+ _name[len] = '\0';
+ printk("***jffs_mkdir(): dir = 0x%p, name = \"%s\", "
+ "len = %d, mode = 0x%08x\n", dir, _name, len, mode);
+ kfree(_name);
+ });
+
+ lock_kernel();
+ dir_f = (struct jffs_file *)dir->u.generic_ip;
+
+ ASSERT(if (!dir_f) {
+ printk(KERN_ERR "jffs_mkdir(): No reference to a "
+ "jffs_file struct in inode.\n");
+ unlock_kernel();
+ return -EIO;
+ });
+
+ c = dir_f->c;
+ D3(printk (KERN_NOTICE "mkdir(): down biglock\n"));
+ down(&c->fmc->biglock);
+
+ dir_mode = S_IFDIR | (mode & (S_IRWXUGO|S_ISVTX)
+ & ~current->fs->umask);
+ if (dir->i_mode & S_ISGID) {
+ dir_mode |= S_ISGID;
+ }
+
+ /* Create a node and initialize it as much as needed. */
+ if (!(node = jffs_alloc_node())) {
+ D(printk("jffs_mkdir(): Allocation failed: node == 0\n"));
+ result = -ENOMEM;
+ goto jffs_mkdir_end;
+ }
+ node->data_offset = 0;
+ node->removed_size = 0;
+
+ /* Initialize the raw inode. */
+ raw_inode.magic = JFFS_MAGIC_BITMASK;
+ raw_inode.ino = c->next_ino++;
+ raw_inode.pino = dir_f->ino;
+ raw_inode.version = 1;
+ raw_inode.mode = dir_mode;
+ raw_inode.uid = current->fsuid;
+ raw_inode.gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+ /* raw_inode.gid = current->fsgid; */
+ raw_inode.atime = get_seconds();
+ raw_inode.mtime = raw_inode.atime;
+ raw_inode.ctime = raw_inode.atime;
+ raw_inode.offset = 0;
+ raw_inode.dsize = 0;
+ raw_inode.rsize = 0;
+ raw_inode.nsize = dentry->d_name.len;
+ raw_inode.nlink = 1;
+ raw_inode.spare = 0;
+ raw_inode.rename = 0;
+ raw_inode.deleted = 0;
+
+ /* Write the new node to the flash. */
+ if ((result = jffs_write_node(c, node, &raw_inode,
+ dentry->d_name.name, NULL, 0, NULL)) < 0) {
+ D(printk("jffs_mkdir(): jffs_write_node() failed.\n"));
+ jffs_free_node(node);
+ goto jffs_mkdir_end;
+ }
+
+ /* Insert the new node into the file system. */
+ if ((result = jffs_insert_node(c, NULL, &raw_inode, dentry->d_name.name,
+ node)) < 0) {
+ goto jffs_mkdir_end;
+ }
+
+ inode = jffs_new_inode(dir, &raw_inode, &err);
+ if (inode == NULL) {
+ result = err;
+ goto jffs_mkdir_end;
+ }
+
+ inode->i_op = &jffs_dir_inode_operations;
+ inode->i_fop = &jffs_dir_operations;
+
+ mark_inode_dirty(dir);
+ d_instantiate(dentry, inode);
+
+ result = 0;
+jffs_mkdir_end:
+ D3(printk (KERN_NOTICE "mkdir(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return result;
+} /* jffs_mkdir() */
+
+
+/* Remove a directory. */
+static int
+jffs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct jffs_control *c = (struct jffs_control *)dir->i_sb->s_fs_info;
+ int ret;
+ D3(printk("***jffs_rmdir()\n"));
+ D3(printk (KERN_NOTICE "rmdir(): down biglock\n"));
+ lock_kernel();
+ down(&c->fmc->biglock);
+ ret = jffs_remove(dir, dentry, S_IFDIR);
+ D3(printk (KERN_NOTICE "rmdir(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return ret;
+}
+
+
+/* Remove any kind of file except for directories. */
+static int
+jffs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct jffs_control *c = (struct jffs_control *)dir->i_sb->s_fs_info;
+ int ret;
+
+ lock_kernel();
+ D3(printk("***jffs_unlink()\n"));
+ D3(printk (KERN_NOTICE "unlink(): down biglock\n"));
+ down(&c->fmc->biglock);
+ ret = jffs_remove(dir, dentry, 0);
+ D3(printk (KERN_NOTICE "unlink(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return ret;
+}
+
+
+/* Remove a JFFS entry, i.e. plain files, directories, etc. Here we
+ shouldn't test for free space on the device. */
+static int
+jffs_remove(struct inode *dir, struct dentry *dentry, int type)
+{
+ struct jffs_raw_inode raw_inode;
+ struct jffs_control *c;
+ struct jffs_file *dir_f; /* The file-to-remove's parent. */
+ struct jffs_file *del_f; /* The file to remove. */
+ struct jffs_node *del_node;
+ struct inode *inode = NULL;
+ int result = 0;
+
+ D1({
+ int len = dentry->d_name.len;
+ const char *name = dentry->d_name.name;
+ char *_name = (char *) kmalloc(len + 1, GFP_KERNEL);
+ memcpy(_name, name, len);
+ _name[len] = '\0';
+ printk("***jffs_remove(): file = \"%s\", ino = %ld\n", _name, dentry->d_inode->i_ino);
+ kfree(_name);
+ });
+
+ dir_f = (struct jffs_file *) dir->u.generic_ip;
+ c = dir_f->c;
+
+ result = -ENOENT;
+ if (!(del_f = jffs_find_child(dir_f, dentry->d_name.name,
+ dentry->d_name.len))) {
+ D(printk("jffs_remove(): jffs_find_child() failed.\n"));
+ goto jffs_remove_end;
+ }
+
+ if (S_ISDIR(type)) {
+ struct jffs_file *child = del_f->children;
+ while(child) {
+ if( !child->deleted ) {
+ result = -ENOTEMPTY;
+ goto jffs_remove_end;
+ }
+ child = child->sibling_next;
+ }
+ }
+ else if (S_ISDIR(del_f->mode)) {
+ D(printk("jffs_remove(): node is a directory "
+ "but it shouldn't be.\n"));
+ result = -EPERM;
+ goto jffs_remove_end;
+ }
+
+ inode = dentry->d_inode;
+
+ result = -EIO;
+ if (del_f->ino != inode->i_ino)
+ goto jffs_remove_end;
+
+ if (!inode->i_nlink) {
+ printk("Deleting nonexistent file inode: %lu, nlink: %d\n",
+ inode->i_ino, inode->i_nlink);
+ inode->i_nlink=1;
+ }
+
+ /* Create a node for the deletion. */
+ result = -ENOMEM;
+ if (!(del_node = jffs_alloc_node())) {
+ D(printk("jffs_remove(): Allocation failed!\n"));
+ goto jffs_remove_end;
+ }
+ del_node->data_offset = 0;
+ del_node->removed_size = 0;
+
+ /* Initialize the raw inode. */
+ raw_inode.magic = JFFS_MAGIC_BITMASK;
+ raw_inode.ino = del_f->ino;
+ raw_inode.pino = del_f->pino;
+/* raw_inode.version = del_f->highest_version + 1; */
+ raw_inode.mode = del_f->mode;
+ raw_inode.uid = current->fsuid;
+ raw_inode.gid = current->fsgid;
+ raw_inode.atime = get_seconds();
+ raw_inode.mtime = del_f->mtime;
+ raw_inode.ctime = raw_inode.atime;
+ raw_inode.offset = 0;
+ raw_inode.dsize = 0;
+ raw_inode.rsize = 0;
+ raw_inode.nsize = 0;
+ raw_inode.nlink = del_f->nlink;
+ raw_inode.spare = 0;
+ raw_inode.rename = 0;
+ raw_inode.deleted = 1;
+
+ /* Write the new node to the flash memory. */
+ if (jffs_write_node(c, del_node, &raw_inode, NULL, NULL, 1, del_f) < 0) {
+ jffs_free_node(del_node);
+ result = -EIO;
+ goto jffs_remove_end;
+ }
+
+ /* Update the file. This operation will make the file disappear
+ from the in-memory file system structures. */
+ jffs_insert_node(c, del_f, &raw_inode, NULL, del_node);
+
+ dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
+ mark_inode_dirty(dir);
+ inode->i_nlink--;
+ inode->i_ctime = dir->i_ctime;
+ mark_inode_dirty(inode);
+
+ d_delete(dentry); /* This also frees the inode */
+
+ result = 0;
+jffs_remove_end:
+ return result;
+} /* jffs_remove() */
+
+
+static int
+jffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
+{
+ struct jffs_raw_inode raw_inode;
+ struct jffs_file *dir_f;
+ struct jffs_node *node = NULL;
+ struct jffs_control *c;
+ struct inode *inode;
+ int result = 0;
+ u16 data = old_encode_dev(rdev);
+ int err;
+
+ D1(printk("***jffs_mknod()\n"));
+
+ if (!old_valid_dev(rdev))
+ return -EINVAL;
+ lock_kernel();
+ dir_f = (struct jffs_file *)dir->u.generic_ip;
+ c = dir_f->c;
+
+ D3(printk (KERN_NOTICE "mknod(): down biglock\n"));
+ down(&c->fmc->biglock);
+
+ /* Create and initialize a new node. */
+ if (!(node = jffs_alloc_node())) {
+ D(printk("jffs_mknod(): Allocation failed!\n"));
+ result = -ENOMEM;
+ goto jffs_mknod_err;
+ }
+ node->data_offset = 0;
+ node->removed_size = 0;
+
+ /* Initialize the raw inode. */
+ raw_inode.magic = JFFS_MAGIC_BITMASK;
+ raw_inode.ino = c->next_ino++;
+ raw_inode.pino = dir_f->ino;
+ raw_inode.version = 1;
+ raw_inode.mode = mode;
+ raw_inode.uid = current->fsuid;
+ raw_inode.gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+ /* raw_inode.gid = current->fsgid; */
+ raw_inode.atime = get_seconds();
+ raw_inode.mtime = raw_inode.atime;
+ raw_inode.ctime = raw_inode.atime;
+ raw_inode.offset = 0;
+ raw_inode.dsize = 2;
+ raw_inode.rsize = 0;
+ raw_inode.nsize = dentry->d_name.len;
+ raw_inode.nlink = 1;
+ raw_inode.spare = 0;
+ raw_inode.rename = 0;
+ raw_inode.deleted = 0;
+
+ /* Write the new node to the flash. */
+ if ((err = jffs_write_node(c, node, &raw_inode, dentry->d_name.name,
+ (unsigned char *)&data, 0, NULL)) < 0) {
+ D(printk("jffs_mknod(): jffs_write_node() failed.\n"));
+ result = err;
+ goto jffs_mknod_err;
+ }
+
+ /* Insert the new node into the file system. */
+ if ((err = jffs_insert_node(c, NULL, &raw_inode, dentry->d_name.name,
+ node)) < 0) {
+ result = err;
+ goto jffs_mknod_end;
+ }
+
+ inode = jffs_new_inode(dir, &raw_inode, &err);
+ if (inode == NULL) {
+ result = err;
+ goto jffs_mknod_end;
+ }
+
+ init_special_inode(inode, mode, rdev);
+
+ d_instantiate(dentry, inode);
+
+ goto jffs_mknod_end;
+
+jffs_mknod_err:
+ if (node) {
+ jffs_free_node(node);
+ }
+
+jffs_mknod_end:
+ D3(printk (KERN_NOTICE "mknod(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return result;
+} /* jffs_mknod() */
+
+
+static int
+jffs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
+{
+ struct jffs_raw_inode raw_inode;
+ struct jffs_control *c;
+ struct jffs_file *dir_f;
+ struct jffs_node *node;
+ struct inode *inode;
+
+ int symname_len = strlen(symname);
+ int err;
+
+ lock_kernel();
+ D1({
+ int len = dentry->d_name.len;
+ char *_name = (char *)kmalloc(len + 1, GFP_KERNEL);
+ char *_symname = (char *)kmalloc(symname_len + 1, GFP_KERNEL);
+ memcpy(_name, dentry->d_name.name, len);
+ _name[len] = '\0';
+ memcpy(_symname, symname, symname_len);
+ _symname[symname_len] = '\0';
+ printk("***jffs_symlink(): dir = 0x%p, "
+ "dentry->dname.name = \"%s\", "
+ "symname = \"%s\"\n", dir, _name, _symname);
+ kfree(_name);
+ kfree(_symname);
+ });
+
+ dir_f = (struct jffs_file *)dir->u.generic_ip;
+ ASSERT(if (!dir_f) {
+ printk(KERN_ERR "jffs_symlink(): No reference to a "
+ "jffs_file struct in inode.\n");
+ unlock_kernel();
+ return -EIO;
+ });
+
+ c = dir_f->c;
+
+ /* Create a node and initialize it as much as needed. */
+ if (!(node = jffs_alloc_node())) {
+ D(printk("jffs_symlink(): Allocation failed: node = NULL\n"));
+ unlock_kernel();
+ return -ENOMEM;
+ }
+ D3(printk (KERN_NOTICE "symlink(): down biglock\n"));
+ down(&c->fmc->biglock);
+
+ node->data_offset = 0;
+ node->removed_size = 0;
+
+ /* Initialize the raw inode. */
+ raw_inode.magic = JFFS_MAGIC_BITMASK;
+ raw_inode.ino = c->next_ino++;
+ raw_inode.pino = dir_f->ino;
+ raw_inode.version = 1;
+ raw_inode.mode = S_IFLNK | S_IRWXUGO;
+ raw_inode.uid = current->fsuid;
+ raw_inode.gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+ raw_inode.atime = get_seconds();
+ raw_inode.mtime = raw_inode.atime;
+ raw_inode.ctime = raw_inode.atime;
+ raw_inode.offset = 0;
+ raw_inode.dsize = symname_len;
+ raw_inode.rsize = 0;
+ raw_inode.nsize = dentry->d_name.len;
+ raw_inode.nlink = 1;
+ raw_inode.spare = 0;
+ raw_inode.rename = 0;
+ raw_inode.deleted = 0;
+
+ /* Write the new node to the flash. */
+ if ((err = jffs_write_node(c, node, &raw_inode, dentry->d_name.name,
+ (const unsigned char *)symname, 0, NULL)) < 0) {
+ D(printk("jffs_symlink(): jffs_write_node() failed.\n"));
+ jffs_free_node(node);
+ goto jffs_symlink_end;
+ }
+
+ /* Insert the new node into the file system. */
+ if ((err = jffs_insert_node(c, NULL, &raw_inode, dentry->d_name.name,
+ node)) < 0) {
+ goto jffs_symlink_end;
+ }
+
+ inode = jffs_new_inode(dir, &raw_inode, &err);
+ if (inode == NULL) {
+ goto jffs_symlink_end;
+ }
+ err = 0;
+ inode->i_op = &page_symlink_inode_operations;
+ inode->i_mapping->a_ops = &jffs_address_operations;
+
+ d_instantiate(dentry, inode);
+ jffs_symlink_end:
+ D3(printk (KERN_NOTICE "symlink(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return err;
+} /* jffs_symlink() */
+
+
+/* Create an inode inside a JFFS directory (dir) and return it.
+ *
+ * By the time this is called, we already have created
+ * the directory cache entry for the new file, but it
+ * is so far negative - it has no inode.
+ *
+ * If the create succeeds, we fill in the inode information
+ * with d_instantiate().
+ */
+static int
+jffs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd)
+{
+ struct jffs_raw_inode raw_inode;
+ struct jffs_control *c;
+ struct jffs_node *node;
+ struct jffs_file *dir_f; /* JFFS representation of the directory. */
+ struct inode *inode;
+ int err;
+
+ lock_kernel();
+ D1({
+ int len = dentry->d_name.len;
+ char *s = (char *)kmalloc(len + 1, GFP_KERNEL);
+ memcpy(s, dentry->d_name.name, len);
+ s[len] = '\0';
+ printk("jffs_create(): dir: 0x%p, name: \"%s\"\n", dir, s);
+ kfree(s);
+ });
+
+ dir_f = (struct jffs_file *)dir->u.generic_ip;
+ ASSERT(if (!dir_f) {
+ printk(KERN_ERR "jffs_create(): No reference to a "
+ "jffs_file struct in inode.\n");
+ unlock_kernel();
+ return -EIO;
+ });
+
+ c = dir_f->c;
+
+ /* Create a node and initialize as much as needed. */
+ if (!(node = jffs_alloc_node())) {
+ D(printk("jffs_create(): Allocation failed: node == 0\n"));
+ unlock_kernel();
+ return -ENOMEM;
+ }
+ D3(printk (KERN_NOTICE "create(): down biglock\n"));
+ down(&c->fmc->biglock);
+
+ node->data_offset = 0;
+ node->removed_size = 0;
+
+ /* Initialize the raw inode. */
+ raw_inode.magic = JFFS_MAGIC_BITMASK;
+ raw_inode.ino = c->next_ino++;
+ raw_inode.pino = dir_f->ino;
+ raw_inode.version = 1;
+ raw_inode.mode = mode;
+ raw_inode.uid = current->fsuid;
+ raw_inode.gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+ raw_inode.atime = get_seconds();
+ raw_inode.mtime = raw_inode.atime;
+ raw_inode.ctime = raw_inode.atime;
+ raw_inode.offset = 0;
+ raw_inode.dsize = 0;
+ raw_inode.rsize = 0;
+ raw_inode.nsize = dentry->d_name.len;
+ raw_inode.nlink = 1;
+ raw_inode.spare = 0;
+ raw_inode.rename = 0;
+ raw_inode.deleted = 0;
+
+ /* Write the new node to the flash. */
+ if ((err = jffs_write_node(c, node, &raw_inode,
+ dentry->d_name.name, NULL, 0, NULL)) < 0) {
+ D(printk("jffs_create(): jffs_write_node() failed.\n"));
+ jffs_free_node(node);
+ goto jffs_create_end;
+ }
+
+ /* Insert the new node into the file system. */
+ if ((err = jffs_insert_node(c, NULL, &raw_inode, dentry->d_name.name,
+ node)) < 0) {
+ goto jffs_create_end;
+ }
+
+ /* Initialize an inode. */
+ inode = jffs_new_inode(dir, &raw_inode, &err);
+ if (inode == NULL) {
+ goto jffs_create_end;
+ }
+ err = 0;
+ inode->i_op = &jffs_file_inode_operations;
+ inode->i_fop = &jffs_file_operations;
+ inode->i_mapping->a_ops = &jffs_address_operations;
+ inode->i_mapping->nrpages = 0;
+
+ d_instantiate(dentry, inode);
+ jffs_create_end:
+ D3(printk (KERN_NOTICE "create(): up biglock\n"));
+ up(&c->fmc->biglock);
+ unlock_kernel();
+ return err;
+} /* jffs_create() */
+
+
+/* Write, append or rewrite data to an existing file. */
+static ssize_t
+jffs_file_write(struct file *filp, const char *buf, size_t count,
+ loff_t *ppos)
+{
+ struct jffs_raw_inode raw_inode;
+ struct jffs_control *c;
+ struct jffs_file *f;
+ struct jffs_node *node;
+ struct dentry *dentry = filp->f_dentry;
+ struct inode *inode = dentry->d_inode;
+ int recoverable = 0;
+ size_t written = 0;
+ __u32 thiscount = count;
+ loff_t pos = *ppos;
+ int err;
+
+ inode = filp->f_dentry->d_inode;
+
+ D2(printk("***jffs_file_write(): inode: 0x%p (ino: %lu), "
+ "filp: 0x%p, buf: 0x%p, count: %d\n",
+ inode, inode->i_ino, filp, buf, count));
+
+#if 0
+ if (inode->i_sb->s_flags & MS_RDONLY) {
+ D(printk("jffs_file_write(): MS_RDONLY\n"));
+ err = -EROFS;
+ goto out_isem;
+ }
+#endif
+ err = -EINVAL;
+
+ if (!S_ISREG(inode->i_mode)) {
+ D(printk("jffs_file_write(): inode->i_mode == 0x%08x\n",
+ inode->i_mode));
+ goto out_isem;
+ }
+
+ if (!(f = (struct jffs_file *)inode->u.generic_ip)) {
+ D(printk("jffs_file_write(): inode->u.generic_ip = 0x%p\n",
+ inode->u.generic_ip));
+ goto out_isem;
+ }
+
+ c = f->c;
+
+ /*
+ * This will never trigger with sane page sizes. leave it in
+ * anyway, since I'm thinking about how to merge larger writes
+ * (the current idea is to poke a thread that does the actual
+ * I/O and starts by doing a down(&inode->i_sem). then we
+ * would need to get the page cache pages and have a list of
+ * I/O requests and do write-merging here.
+ * -- prumpf
+ */
+ thiscount = min(c->fmc->max_chunk_size - sizeof(struct jffs_raw_inode), count);
+
+ D3(printk (KERN_NOTICE "file_write(): down biglock\n"));
+ down(&c->fmc->biglock);
+
+ /* Urgh. POSIX says we can do short writes if we feel like it.
+ * In practice, we can't. Nothing will cope. So we loop until
+ * we're done.
+ *
+ * <_Anarchy_> posix and reality are not interconnected on this issue
+ */
+ while (count) {
+ /* Things are going to be written so we could allocate and
+ initialize the necessary data structures now. */
+ if (!(node = jffs_alloc_node())) {
+ D(printk("jffs_file_write(): node == 0\n"));
+ err = -ENOMEM;
+ goto out;
+ }
+
+ node->data_offset = pos;
+ node->removed_size = 0;
+
+ /* Initialize the raw inode. */
+ raw_inode.magic = JFFS_MAGIC_BITMASK;
+ raw_inode.ino = f->ino;
+ raw_inode.pino = f->pino;
+
+ raw_inode.mode = f->mode;
+
+ raw_inode.uid = f->uid;
+ raw_inode.gid = f->gid;
+ raw_inode.atime = get_seconds();
+ raw_inode.mtime = raw_inode.atime;
+ raw_inode.ctime = f->ctime;
+ raw_inode.offset = pos;
+ raw_inode.dsize = thiscount;
+ raw_inode.rsize = 0;
+ raw_inode.nsize = f->nsize;
+ raw_inode.nlink = f->nlink;
+ raw_inode.spare = 0;
+ raw_inode.rename = 0;
+ raw_inode.deleted = 0;
+
+ if (pos < f->size) {
+ node->removed_size = raw_inode.rsize = min(thiscount, (__u32)(f->size - pos));
+
+ /* If this node is going entirely over the top of old data,
+ we can allow it to go into the reserved space, because
+ we know that GC can reclaim the space later.
+ */
+ if (pos + thiscount < f->size) {
+ /* If all the data we're overwriting are _real_,
+ not just holes, then:
+ recoverable = 1;
+ */
+ }
+ }
+
+ /* Write the new node to the flash. */
+ /* NOTE: We would be quite happy if jffs_write_node() wrote a
+ smaller node than we were expecting. There's no need for it
+ to waste the space at the end of the flash just because it's
+ a little smaller than what we asked for. But that's a whole
+ new can of worms which I'm not going to open this week.
+ -- dwmw2.
+ */
+ if ((err = jffs_write_node(c, node, &raw_inode, f->name,
+ (const unsigned char *)buf,
+ recoverable, f)) < 0) {
+ D(printk("jffs_file_write(): jffs_write_node() failed.\n"));
+ jffs_free_node(node);
+ goto out;
+ }
+
+ written += err;
+ buf += err;
+ count -= err;
+ pos += err;
+
+ /* Insert the new node into the file system. */
+ if ((err = jffs_insert_node(c, f, &raw_inode, NULL, node)) < 0) {
+ goto out;
+ }
+
+ D3(printk("jffs_file_write(): new f_pos %ld.\n", (long)pos));
+
+ thiscount = min(c->fmc->max_chunk_size - sizeof(struct jffs_raw_inode), count);
+ }
+ out:
+ D3(printk (KERN_NOTICE "file_write(): up biglock\n"));
+ up(&c->fmc->biglock);
+
+ /* Fix things in the real inode. */
+ if (pos > inode->i_size) {
+ inode->i_size = pos;
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+ }
+ inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
+ invalidate_inode_pages(inode->i_mapping);
+
+ out_isem:
+ return err;
+} /* jffs_file_write() */
+
+static int
+jffs_prepare_write(struct file *filp, struct page *page,
+ unsigned from, unsigned to)
+{
+ /* FIXME: we should detect some error conditions here */
+
+ /* Bugger that. We should make sure the page is uptodate */
+ if (!PageUptodate(page) && (from || to < PAGE_CACHE_SIZE))
+ return jffs_do_readpage_nolock(filp, page);
+
+ return 0;
+} /* jffs_prepare_write() */
+
+static int
+jffs_commit_write(struct file *filp, struct page *page,
+ unsigned from, unsigned to)
+{
+ void *addr = page_address(page) + from;
+ /* XXX: PAGE_CACHE_SHIFT or PAGE_SHIFT */
+ loff_t pos = (page->index<<PAGE_CACHE_SHIFT) + from;
+
+ return jffs_file_write(filp, addr, to-from, &pos);
+} /* jffs_commit_write() */
+
+/* This is our ioctl() routine. */
+static int
+jffs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ struct jffs_control *c;
+ int ret = 0;
+
+ D2(printk("***jffs_ioctl(): cmd = 0x%08x, arg = 0x%08lx\n",
+ cmd, arg));
+
+ if (!(c = (struct jffs_control *)inode->i_sb->s_fs_info)) {
+ printk(KERN_ERR "JFFS: Bad inode in ioctl() call. "
+ "(cmd = 0x%08x)\n", cmd);
+ return -EIO;
+ }
+ D3(printk (KERN_NOTICE "ioctl(): down biglock\n"));
+ down(&c->fmc->biglock);
+
+ switch (cmd) {
+ case JFFS_PRINT_HASH:
+ jffs_print_hash_table(c);
+ break;
+ case JFFS_PRINT_TREE:
+ jffs_print_tree(c->root, 0);
+ break;
+ case JFFS_GET_STATUS:
+ {
+ struct jffs_flash_status fst;
+ struct jffs_fmcontrol *fmc = c->fmc;
+ printk("Flash status -- ");
+ if (!access_ok(VERIFY_WRITE,
+ (struct jffs_flash_status __user *)arg,
+ sizeof(struct jffs_flash_status))) {
+ D(printk("jffs_ioctl(): Bad arg in "
+ "JFFS_GET_STATUS ioctl!\n"));
+ ret = -EFAULT;
+ break;
+ }
+ fst.size = fmc->flash_size;
+ fst.used = fmc->used_size;
+ fst.dirty = fmc->dirty_size;
+ fst.begin = fmc->head->offset;
+ fst.end = fmc->tail->offset + fmc->tail->size;
+ printk("size: %d, used: %d, dirty: %d, "
+ "begin: %d, end: %d\n",
+ fst.size, fst.used, fst.dirty,
+ fst.begin, fst.end);
+ if (copy_to_user((struct jffs_flash_status __user *)arg,
+ &fst,
+ sizeof(struct jffs_flash_status))) {
+ ret = -EFAULT;
+ }
+ }
+ break;
+ default:
+ ret = -ENOTTY;
+ }
+ D3(printk (KERN_NOTICE "ioctl(): up biglock\n"));
+ up(&c->fmc->biglock);
+ return ret;
+} /* jffs_ioctl() */
+
+
+static struct address_space_operations jffs_address_operations = {
+ .readpage = jffs_readpage,
+ .prepare_write = jffs_prepare_write,
+ .commit_write = jffs_commit_write,
+};
+
+static int jffs_fsync(struct file *f, struct dentry *d, int datasync)
+{
+ /* We currently have O_SYNC operations at all times.
+ Do nothing.
+ */
+ return 0;
+}
+
+
+extern int generic_file_open(struct inode *, struct file *) __attribute__((weak));
+extern loff_t generic_file_llseek(struct file *, loff_t, int) __attribute__((weak));
+
+static struct file_operations jffs_file_operations =
+{
+ .open = generic_file_open,
+ .llseek = generic_file_llseek,
+ .read = generic_file_read,
+ .write = generic_file_write,
+ .ioctl = jffs_ioctl,
+ .mmap = generic_file_readonly_mmap,
+ .fsync = jffs_fsync,
+ .sendfile = generic_file_sendfile,
+};
+
+
+static struct inode_operations jffs_file_inode_operations =
+{
+ .lookup = jffs_lookup, /* lookup */
+ .setattr = jffs_setattr,
+};
+
+
+static struct file_operations jffs_dir_operations =
+{
+ .readdir = jffs_readdir,
+};
+
+
+static struct inode_operations jffs_dir_inode_operations =
+{
+ .create = jffs_create,
+ .lookup = jffs_lookup,
+ .unlink = jffs_unlink,
+ .symlink = jffs_symlink,
+ .mkdir = jffs_mkdir,
+ .rmdir = jffs_rmdir,
+ .mknod = jffs_mknod,
+ .rename = jffs_rename,
+ .setattr = jffs_setattr,
+};
+
+
+/* Initialize an inode for the VFS. */
+static void
+jffs_read_inode(struct inode *inode)
+{
+ struct jffs_file *f;
+ struct jffs_control *c;
+
+ D3(printk("jffs_read_inode(): inode->i_ino == %lu\n", inode->i_ino));
+
+ if (!inode->i_sb) {
+ D(printk("jffs_read_inode(): !inode->i_sb ==> "
+ "No super block!\n"));
+ return;
+ }
+ c = (struct jffs_control *)inode->i_sb->s_fs_info;
+ D3(printk (KERN_NOTICE "read_inode(): down biglock\n"));
+ down(&c->fmc->biglock);
+ if (!(f = jffs_find_file(c, inode->i_ino))) {
+ D(printk("jffs_read_inode(): No such inode (%lu).\n",
+ inode->i_ino));
+ D3(printk (KERN_NOTICE "read_inode(): up biglock\n"));
+ up(&c->fmc->biglock);
+ return;
+ }
+ inode->u.generic_ip = (void *)f;
+ inode->i_mode = f->mode;
+ inode->i_nlink = f->nlink;
+ inode->i_uid = f->uid;
+ inode->i_gid = f->gid;
+ inode->i_size = f->size;
+ inode->i_atime.tv_sec = f->atime;
+ inode->i_mtime.tv_sec = f->mtime;
+ inode->i_ctime.tv_sec = f->ctime;
+ inode->i_atime.tv_nsec =
+ inode->i_mtime.tv_nsec =
+ inode->i_ctime.tv_nsec = 0;
+
+ inode->i_blksize = PAGE_SIZE;
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+ if (S_ISREG(inode->i_mode)) {
+ inode->i_op = &jffs_file_inode_operations;
+ inode->i_fop = &jffs_file_operations;
+ inode->i_mapping->a_ops = &jffs_address_operations;
+ }
+ else if (S_ISDIR(inode->i_mode)) {
+ inode->i_op = &jffs_dir_inode_operations;
+ inode->i_fop = &jffs_dir_operations;
+ }
+ else if (S_ISLNK(inode->i_mode)) {
+ inode->i_op = &page_symlink_inode_operations;
+ inode->i_mapping->a_ops = &jffs_address_operations;
+ }
+ else {
+ /* If the node is a device of some sort, then the number of
+ the device should be read from the flash memory and then
+ added to the inode's i_rdev member. */
+ u16 val;
+ jffs_read_data(f, (char *)&val, 0, 2);
+ init_special_inode(inode, inode->i_mode,
+ old_decode_dev(val));
+ }
+
+ D3(printk (KERN_NOTICE "read_inode(): up biglock\n"));
+ up(&c->fmc->biglock);
+}
+
+
+static void
+jffs_delete_inode(struct inode *inode)
+{
+ struct jffs_file *f;
+ struct jffs_control *c;
+ D3(printk("jffs_delete_inode(): inode->i_ino == %lu\n",
+ inode->i_ino));
+
+ lock_kernel();
+ inode->i_size = 0;
+ inode->i_blocks = 0;
+ inode->u.generic_ip = NULL;
+ clear_inode(inode);
+ if (inode->i_nlink == 0) {
+ c = (struct jffs_control *) inode->i_sb->s_fs_info;
+ f = (struct jffs_file *) jffs_find_file (c, inode->i_ino);
+ jffs_possibly_delete_file(f);
+ }
+
+ unlock_kernel();
+}
+
+
+static void
+jffs_write_super(struct super_block *sb)
+{
+ struct jffs_control *c = (struct jffs_control *)sb->s_fs_info;
+ lock_kernel();
+ jffs_garbage_collect_trigger(c);
+ unlock_kernel();
+}
+
+static int jffs_remount(struct super_block *sb, int *flags, char *data)
+{
+ *flags |= MS_NODIRATIME;
+ return 0;
+}
+
+static struct super_operations jffs_ops =
+{
+ .read_inode = jffs_read_inode,
+ .delete_inode = jffs_delete_inode,
+ .put_super = jffs_put_super,
+ .write_super = jffs_write_super,
+ .statfs = jffs_statfs,
+ .remount_fs = jffs_remount,
+};
+
+static struct super_block *jffs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
+{
+ return get_sb_bdev(fs_type, flags, dev_name, data, jffs_fill_super);
+}
+
+static struct file_system_type jffs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "jffs",
+ .get_sb = jffs_get_sb,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+
+static int __init
+init_jffs_fs(void)
+{
+ printk(KERN_INFO "JFFS version " JFFS_VERSION_STRING
+ ", (C) 1999, 2000 Axis Communications AB\n");
+
+#ifdef CONFIG_JFFS_PROC_FS
+ jffs_proc_root = proc_mkdir("jffs", proc_root_fs);
+ if (!jffs_proc_root) {
+ printk(KERN_WARNING "cannot create /proc/jffs entry\n");
+ }
+#endif
+ fm_cache = kmem_cache_create("jffs_fm", sizeof(struct jffs_fm),
+ 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
+ NULL, NULL);
+ if (!fm_cache) {
+ return -ENOMEM;
+ }
+
+ node_cache = kmem_cache_create("jffs_node",sizeof(struct jffs_node),
+ 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
+ NULL, NULL);
+ if (!node_cache) {
+ kmem_cache_destroy(fm_cache);
+ return -ENOMEM;
+ }
+
+ return register_filesystem(&jffs_fs_type);
+}
+
+static void __exit
+exit_jffs_fs(void)
+{
+ unregister_filesystem(&jffs_fs_type);
+ kmem_cache_destroy(fm_cache);
+ kmem_cache_destroy(node_cache);
+}
+
+module_init(init_jffs_fs)
+module_exit(exit_jffs_fs)
+
+MODULE_DESCRIPTION("The Journalling Flash File System");
+MODULE_AUTHOR("Axis Communications AB.");
+MODULE_LICENSE("GPL");