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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/jffs2/super.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/jffs2/super.c')
-rw-r--r--ANDROID_3.4.5/fs/jffs2/super.c434
1 files changed, 0 insertions, 434 deletions
diff --git a/ANDROID_3.4.5/fs/jffs2/super.c b/ANDROID_3.4.5/fs/jffs2/super.c
deleted file mode 100644
index f9916f31..00000000
--- a/ANDROID_3.4.5/fs/jffs2/super.c
+++ /dev/null
@@ -1,434 +0,0 @@
-/*
- * JFFS2 -- Journalling Flash File System, Version 2.
- *
- * Copyright © 2001-2007 Red Hat, Inc.
- *
- * Created by David Woodhouse <dwmw2@infradead.org>
- *
- * For licensing information, see the file 'LICENCE' in this directory.
- *
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/fs.h>
-#include <linux/err.h>
-#include <linux/mount.h>
-#include <linux/parser.h>
-#include <linux/jffs2.h>
-#include <linux/pagemap.h>
-#include <linux/mtd/super.h>
-#include <linux/ctype.h>
-#include <linux/namei.h>
-#include <linux/seq_file.h>
-#include <linux/exportfs.h>
-#include "compr.h"
-#include "nodelist.h"
-
-static void jffs2_put_super(struct super_block *);
-
-static struct kmem_cache *jffs2_inode_cachep;
-
-static struct inode *jffs2_alloc_inode(struct super_block *sb)
-{
- struct jffs2_inode_info *f;
-
- f = kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL);
- if (!f)
- return NULL;
- return &f->vfs_inode;
-}
-
-static void jffs2_i_callback(struct rcu_head *head)
-{
- struct inode *inode = container_of(head, struct inode, i_rcu);
- kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode));
-}
-
-static void jffs2_destroy_inode(struct inode *inode)
-{
- call_rcu(&inode->i_rcu, jffs2_i_callback);
-}
-
-static void jffs2_i_init_once(void *foo)
-{
- struct jffs2_inode_info *f = foo;
-
- mutex_init(&f->sem);
- inode_init_once(&f->vfs_inode);
-}
-
-static void jffs2_write_super(struct super_block *sb)
-{
- struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
-
- lock_super(sb);
- sb->s_dirt = 0;
-
- if (!(sb->s_flags & MS_RDONLY)) {
- jffs2_dbg(1, "%s()\n", __func__);
- jffs2_flush_wbuf_gc(c, 0);
- }
-
- unlock_super(sb);
-}
-
-static const char *jffs2_compr_name(unsigned int compr)
-{
- switch (compr) {
- case JFFS2_COMPR_MODE_NONE:
- return "none";
-#ifdef CONFIG_JFFS2_LZO
- case JFFS2_COMPR_MODE_FORCELZO:
- return "lzo";
-#endif
-#ifdef CONFIG_JFFS2_ZLIB
- case JFFS2_COMPR_MODE_FORCEZLIB:
- return "zlib";
-#endif
- default:
- /* should never happen; programmer error */
- WARN_ON(1);
- return "";
- }
-}
-
-static int jffs2_show_options(struct seq_file *s, struct dentry *root)
-{
- struct jffs2_sb_info *c = JFFS2_SB_INFO(root->d_sb);
- struct jffs2_mount_opts *opts = &c->mount_opts;
-
- if (opts->override_compr)
- seq_printf(s, ",compr=%s", jffs2_compr_name(opts->compr));
-
- return 0;
-}
-
-static int jffs2_sync_fs(struct super_block *sb, int wait)
-{
- struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
-
- jffs2_write_super(sb);
-
- mutex_lock(&c->alloc_sem);
- jffs2_flush_wbuf_pad(c);
- mutex_unlock(&c->alloc_sem);
- return 0;
-}
-
-static struct inode *jffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
- uint32_t generation)
-{
- /* We don't care about i_generation. We'll destroy the flash
- before we start re-using inode numbers anyway. And even
- if that wasn't true, we'd have other problems...*/
- return jffs2_iget(sb, ino);
-}
-
-static struct dentry *jffs2_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,
- jffs2_nfs_get_inode);
-}
-
-static struct dentry *jffs2_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,
- jffs2_nfs_get_inode);
-}
-
-static struct dentry *jffs2_get_parent(struct dentry *child)
-{
- struct jffs2_inode_info *f;
- uint32_t pino;
-
- BUG_ON(!S_ISDIR(child->d_inode->i_mode));
-
- f = JFFS2_INODE_INFO(child->d_inode);
-
- pino = f->inocache->pino_nlink;
-
- JFFS2_DEBUG("Parent of directory ino #%u is #%u\n",
- f->inocache->ino, pino);
-
- return d_obtain_alias(jffs2_iget(child->d_inode->i_sb, pino));
-}
-
-static const struct export_operations jffs2_export_ops = {
- .get_parent = jffs2_get_parent,
- .fh_to_dentry = jffs2_fh_to_dentry,
- .fh_to_parent = jffs2_fh_to_parent,
-};
-
-/*
- * JFFS2 mount options.
- *
- * Opt_override_compr: override default compressor
- * Opt_err: just end of array marker
- */
-enum {
- Opt_override_compr,
- Opt_err,
-};
-
-static const match_table_t tokens = {
- {Opt_override_compr, "compr=%s"},
- {Opt_err, NULL},
-};
-
-static int jffs2_parse_options(struct jffs2_sb_info *c, char *data)
-{
- substring_t args[MAX_OPT_ARGS];
- char *p, *name;
-
- if (!data)
- return 0;
-
- while ((p = strsep(&data, ","))) {
- int token;
-
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_override_compr:
- name = match_strdup(&args[0]);
-
- if (!name)
- return -ENOMEM;
- if (!strcmp(name, "none"))
- c->mount_opts.compr = JFFS2_COMPR_MODE_NONE;
-#ifdef CONFIG_JFFS2_LZO
- else if (!strcmp(name, "lzo"))
- c->mount_opts.compr = JFFS2_COMPR_MODE_FORCELZO;
-#endif
-#ifdef CONFIG_JFFS2_ZLIB
- else if (!strcmp(name, "zlib"))
- c->mount_opts.compr =
- JFFS2_COMPR_MODE_FORCEZLIB;
-#endif
- else {
- pr_err("Error: unknown compressor \"%s\"\n",
- name);
- kfree(name);
- return -EINVAL;
- }
- kfree(name);
- c->mount_opts.override_compr = true;
- break;
- default:
- pr_err("Error: unrecognized mount option '%s' or missing value\n",
- p);
- return -EINVAL;
- }
- }
-
- return 0;
-}
-
-static int jffs2_remount_fs(struct super_block *sb, int *flags, char *data)
-{
- struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
- int err;
-
- err = jffs2_parse_options(c, data);
- if (err)
- return -EINVAL;
-
- return jffs2_do_remount_fs(sb, flags, data);
-}
-
-static const struct super_operations jffs2_super_operations =
-{
- .alloc_inode = jffs2_alloc_inode,
- .destroy_inode =jffs2_destroy_inode,
- .put_super = jffs2_put_super,
- .write_super = jffs2_write_super,
- .statfs = jffs2_statfs,
- .remount_fs = jffs2_remount_fs,
- .evict_inode = jffs2_evict_inode,
- .dirty_inode = jffs2_dirty_inode,
- .show_options = jffs2_show_options,
- .sync_fs = jffs2_sync_fs,
-};
-
-/*
- * fill in the superblock
- */
-static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
-{
- struct jffs2_sb_info *c;
- int ret;
-
- jffs2_dbg(1, "jffs2_get_sb_mtd():"
- " New superblock for device %d (\"%s\")\n",
- sb->s_mtd->index, sb->s_mtd->name);
-
- c = kzalloc(sizeof(*c), GFP_KERNEL);
- if (!c)
- return -ENOMEM;
-
- c->mtd = sb->s_mtd;
- c->os_priv = sb;
- sb->s_fs_info = c;
-
- ret = jffs2_parse_options(c, data);
- if (ret) {
- kfree(c);
- return -EINVAL;
- }
-
- /* Initialize JFFS2 superblock locks, the further initialization will
- * be done later */
- mutex_init(&c->alloc_sem);
- mutex_init(&c->erase_free_sem);
- init_waitqueue_head(&c->erase_wait);
- init_waitqueue_head(&c->inocache_wq);
- spin_lock_init(&c->erase_completion_lock);
- spin_lock_init(&c->inocache_lock);
-
- sb->s_op = &jffs2_super_operations;
- sb->s_export_op = &jffs2_export_ops;
- sb->s_flags = sb->s_flags | MS_NOATIME;
- sb->s_xattr = jffs2_xattr_handlers;
-#ifdef CONFIG_JFFS2_FS_POSIX_ACL
- sb->s_flags |= MS_POSIXACL;
-#endif
- ret = jffs2_do_fill_super(sb, data, silent);
- return ret;
-}
-
-static struct dentry *jffs2_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
-{
- return mount_mtd(fs_type, flags, dev_name, data, jffs2_fill_super);
-}
-
-static void jffs2_put_super (struct super_block *sb)
-{
- struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
-
- jffs2_dbg(2, "%s()\n", __func__);
-
- if (sb->s_dirt)
- jffs2_write_super(sb);
-
- mutex_lock(&c->alloc_sem);
- jffs2_flush_wbuf_pad(c);
- mutex_unlock(&c->alloc_sem);
-
- jffs2_sum_exit(c);
-
- jffs2_free_ino_caches(c);
- jffs2_free_raw_node_refs(c);
- if (jffs2_blocks_use_vmalloc(c))
- vfree(c->blocks);
- else
- kfree(c->blocks);
- jffs2_flash_cleanup(c);
- kfree(c->inocache_list);
- jffs2_clear_xattr_subsystem(c);
- mtd_sync(c->mtd);
- jffs2_dbg(1, "%s(): returning\n", __func__);
-}
-
-static void jffs2_kill_sb(struct super_block *sb)
-{
- struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
- if (!(sb->s_flags & MS_RDONLY))
- jffs2_stop_garbage_collect_thread(c);
- kill_mtd_super(sb);
- kfree(c);
-}
-
-static struct file_system_type jffs2_fs_type = {
- .owner = THIS_MODULE,
- .name = "jffs2",
- .mount = jffs2_mount,
- .kill_sb = jffs2_kill_sb,
-};
-
-static int __init init_jffs2_fs(void)
-{
- int ret;
-
- /* Paranoia checks for on-medium structures. If we ask GCC
- to pack them with __attribute__((packed)) then it _also_
- assumes that they're not aligned -- so it emits crappy
- code on some architectures. Ideally we want an attribute
- which means just 'no padding', without the alignment
- thing. But GCC doesn't have that -- we have to just
- hope the structs are the right sizes, instead. */
- BUILD_BUG_ON(sizeof(struct jffs2_unknown_node) != 12);
- BUILD_BUG_ON(sizeof(struct jffs2_raw_dirent) != 40);
- BUILD_BUG_ON(sizeof(struct jffs2_raw_inode) != 68);
- BUILD_BUG_ON(sizeof(struct jffs2_raw_summary) != 32);
-
- pr_info("version 2.2."
-#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
- " (NAND)"
-#endif
-#ifdef CONFIG_JFFS2_SUMMARY
- " (SUMMARY) "
-#endif
- " © 2001-2006 Red Hat, Inc.\n");
-
- jffs2_inode_cachep = kmem_cache_create("jffs2_i",
- sizeof(struct jffs2_inode_info),
- 0, (SLAB_RECLAIM_ACCOUNT|
- SLAB_MEM_SPREAD),
- jffs2_i_init_once);
- if (!jffs2_inode_cachep) {
- pr_err("error: Failed to initialise inode cache\n");
- return -ENOMEM;
- }
- ret = jffs2_compressors_init();
- if (ret) {
- pr_err("error: Failed to initialise compressors\n");
- goto out;
- }
- ret = jffs2_create_slab_caches();
- if (ret) {
- pr_err("error: Failed to initialise slab caches\n");
- goto out_compressors;
- }
- ret = register_filesystem(&jffs2_fs_type);
- if (ret) {
- pr_err("error: Failed to register filesystem\n");
- goto out_slab;
- }
- return 0;
-
- out_slab:
- jffs2_destroy_slab_caches();
- out_compressors:
- jffs2_compressors_exit();
- out:
- kmem_cache_destroy(jffs2_inode_cachep);
- return ret;
-}
-
-static void __exit exit_jffs2_fs(void)
-{
- unregister_filesystem(&jffs2_fs_type);
- jffs2_destroy_slab_caches();
- jffs2_compressors_exit();
- kmem_cache_destroy(jffs2_inode_cachep);
-}
-
-module_init(init_jffs2_fs);
-module_exit(exit_jffs2_fs);
-
-MODULE_DESCRIPTION("The Journalling Flash File System, v2");
-MODULE_AUTHOR("Red Hat, Inc.");
-MODULE_LICENSE("GPL"); // Actually dual-licensed, but it doesn't matter for
- // the sake of this tag. It's Free Software.