android_kernel_motorola_sm6225/fs/hfsplus/super.c
Paul Mundt 20c2df83d2 mm: Remove slab destructors from kmem_cache_create().
Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.

This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 10:11:58 +09:00

498 lines
15 KiB
C

/*
* linux/fs/hfsplus/super.c
*
* Copyright (C) 2001
* Brad Boyer (flar@allandria.com)
* (C) 2003 Ardis Technologies <roman@ardistech.com>
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/vfs.h>
#include <linux/nls.h>
static struct inode *hfsplus_alloc_inode(struct super_block *sb);
static void hfsplus_destroy_inode(struct inode *inode);
#include "hfsplus_fs.h"
static void hfsplus_read_inode(struct inode *inode)
{
struct hfs_find_data fd;
struct hfsplus_vh *vhdr;
int err;
INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
init_MUTEX(&HFSPLUS_I(inode).extents_lock);
HFSPLUS_I(inode).flags = 0;
HFSPLUS_I(inode).rsrc_inode = NULL;
atomic_set(&HFSPLUS_I(inode).opencnt, 0);
if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
read_inode:
hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd);
err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
if (!err)
err = hfsplus_cat_read_inode(inode, &fd);
hfs_find_exit(&fd);
if (err)
goto bad_inode;
return;
}
vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
switch(inode->i_ino) {
case HFSPLUS_ROOT_CNID:
goto read_inode;
case HFSPLUS_EXT_CNID:
hfsplus_inode_read_fork(inode, &vhdr->ext_file);
inode->i_mapping->a_ops = &hfsplus_btree_aops;
break;
case HFSPLUS_CAT_CNID:
hfsplus_inode_read_fork(inode, &vhdr->cat_file);
inode->i_mapping->a_ops = &hfsplus_btree_aops;
break;
case HFSPLUS_ALLOC_CNID:
hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
inode->i_mapping->a_ops = &hfsplus_aops;
break;
case HFSPLUS_START_CNID:
hfsplus_inode_read_fork(inode, &vhdr->start_file);
break;
case HFSPLUS_ATTR_CNID:
hfsplus_inode_read_fork(inode, &vhdr->attr_file);
inode->i_mapping->a_ops = &hfsplus_btree_aops;
break;
default:
goto bad_inode;
}
return;
bad_inode:
make_bad_inode(inode);
}
static int hfsplus_write_inode(struct inode *inode, int unused)
{
struct hfsplus_vh *vhdr;
int ret = 0;
dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
hfsplus_ext_write_extent(inode);
if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
return hfsplus_cat_write_inode(inode);
}
vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
switch (inode->i_ino) {
case HFSPLUS_ROOT_CNID:
ret = hfsplus_cat_write_inode(inode);
break;
case HFSPLUS_EXT_CNID:
if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) {
HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
inode->i_sb->s_dirt = 1;
}
hfsplus_inode_write_fork(inode, &vhdr->ext_file);
hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree);
break;
case HFSPLUS_CAT_CNID:
if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) {
HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
inode->i_sb->s_dirt = 1;
}
hfsplus_inode_write_fork(inode, &vhdr->cat_file);
hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree);
break;
case HFSPLUS_ALLOC_CNID:
if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) {
HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
inode->i_sb->s_dirt = 1;
}
hfsplus_inode_write_fork(inode, &vhdr->alloc_file);
break;
case HFSPLUS_START_CNID:
if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) {
HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
inode->i_sb->s_dirt = 1;
}
hfsplus_inode_write_fork(inode, &vhdr->start_file);
break;
case HFSPLUS_ATTR_CNID:
if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) {
HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
inode->i_sb->s_dirt = 1;
}
hfsplus_inode_write_fork(inode, &vhdr->attr_file);
hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree);
break;
}
return ret;
}
static void hfsplus_clear_inode(struct inode *inode)
{
dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino);
if (HFSPLUS_IS_RSRC(inode)) {
HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL;
iput(HFSPLUS_I(inode).rsrc_inode);
}
}
static void hfsplus_write_super(struct super_block *sb)
{
struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
dprint(DBG_SUPER, "hfsplus_write_super\n");
sb->s_dirt = 0;
if (sb->s_flags & MS_RDONLY)
/* warn? */
return;
vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid);
vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count);
vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count);
mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) {
if (HFSPLUS_SB(sb).sect_count) {
struct buffer_head *bh;
u32 block, offset;
block = HFSPLUS_SB(sb).blockoffset;
block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9);
offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1);
printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset,
HFSPLUS_SB(sb).sect_count, block, offset);
bh = sb_bread(sb, block);
if (bh) {
vhdr = (struct hfsplus_vh *)(bh->b_data + offset);
if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) {
memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr));
mark_buffer_dirty(bh);
brelse(bh);
} else
printk(KERN_WARNING "hfs: backup not found!\n");
}
}
HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
}
}
static void hfsplus_put_super(struct super_block *sb)
{
dprint(DBG_SUPER, "hfsplus_put_super\n");
if (!sb->s_fs_info)
return;
if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
vhdr->modify_date = hfsp_now2mt();
vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
}
hfs_btree_close(HFSPLUS_SB(sb).cat_tree);
hfs_btree_close(HFSPLUS_SB(sb).ext_tree);
iput(HFSPLUS_SB(sb).alloc_file);
iput(HFSPLUS_SB(sb).hidden_dir);
brelse(HFSPLUS_SB(sb).s_vhbh);
if (HFSPLUS_SB(sb).nls)
unload_nls(HFSPLUS_SB(sb).nls);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
}
static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *sb = dentry->d_sb;
buf->f_type = HFSPLUS_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift;
buf->f_bavail = buf->f_bfree;
buf->f_files = 0xFFFFFFFF;
buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid;
buf->f_namelen = HFSPLUS_MAX_STRLEN;
return 0;
}
static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
{
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
return 0;
if (!(*flags & MS_RDONLY)) {
struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
struct hfsplus_sb_info sbi;
memset(&sbi, 0, sizeof(struct hfsplus_sb_info));
sbi.nls = HFSPLUS_SB(sb).nls;
if (!hfsplus_parse_options(data, &sbi))
return -EINVAL;
if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
"running fsck.hfsplus is recommended. leaving read-only.\n");
sb->s_flags |= MS_RDONLY;
*flags |= MS_RDONLY;
} else if (sbi.flags & HFSPLUS_SB_FORCE) {
/* nothing */
} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
sb->s_flags |= MS_RDONLY;
*flags |= MS_RDONLY;
} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
sb->s_flags |= MS_RDONLY;
*flags |= MS_RDONLY;
}
}
return 0;
}
static const struct super_operations hfsplus_sops = {
.alloc_inode = hfsplus_alloc_inode,
.destroy_inode = hfsplus_destroy_inode,
.read_inode = hfsplus_read_inode,
.write_inode = hfsplus_write_inode,
.clear_inode = hfsplus_clear_inode,
.put_super = hfsplus_put_super,
.write_super = hfsplus_write_super,
.statfs = hfsplus_statfs,
.remount_fs = hfsplus_remount,
.show_options = hfsplus_show_options,
};
static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
{
struct hfsplus_vh *vhdr;
struct hfsplus_sb_info *sbi;
hfsplus_cat_entry entry;
struct hfs_find_data fd;
struct inode *root;
struct qstr str;
struct nls_table *nls = NULL;
int err = -EINVAL;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
hfsplus_fill_defaults(sbi);
if (!hfsplus_parse_options(data, sbi)) {
printk(KERN_ERR "hfs: unable to parse mount options\n");
err = -EINVAL;
goto cleanup;
}
/* temporarily use utf8 to correctly find the hidden dir below */
nls = sbi->nls;
sbi->nls = load_nls("utf8");
if (!sbi->nls) {
printk(KERN_ERR "hfs: unable to load nls for utf8\n");
err = -EINVAL;
goto cleanup;
}
/* Grab the volume header */
if (hfsplus_read_wrapper(sb)) {
if (!silent)
printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
err = -EINVAL;
goto cleanup;
}
vhdr = HFSPLUS_SB(sb).s_vhdr;
/* Copy parts of the volume header into the superblock */
sb->s_magic = HFSPLUS_VOLHEAD_SIG;
if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
printk(KERN_ERR "hfs: wrong filesystem version\n");
goto cleanup;
}
HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks);
HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks);
HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc);
HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid);
HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count);
HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count);
HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
if (!HFSPLUS_SB(sb).data_clump_blocks)
HFSPLUS_SB(sb).data_clump_blocks = 1;
HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
if (!HFSPLUS_SB(sb).rsrc_clump_blocks)
HFSPLUS_SB(sb).rsrc_clump_blocks = 1;
/* Set up operations so we can load metadata */
sb->s_op = &hfsplus_sops;
sb->s_maxbytes = MAX_LFS_FILESIZE;
if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
"running fsck.hfsplus is recommended. mounting read-only.\n");
sb->s_flags |= MS_RDONLY;
} else if (sbi->flags & HFSPLUS_SB_FORCE) {
/* nothing */
} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
sb->s_flags |= MS_RDONLY;
} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
printk(KERN_WARNING "hfs: write access to a jounaled filesystem is not supported, "
"use the force option at your own risk, mounting read-only.\n");
sb->s_flags |= MS_RDONLY;
}
sbi->flags &= ~HFSPLUS_SB_FORCE;
/* Load metadata objects (B*Trees) */
HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
if (!HFSPLUS_SB(sb).ext_tree) {
printk(KERN_ERR "hfs: failed to load extents file\n");
goto cleanup;
}
HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
if (!HFSPLUS_SB(sb).cat_tree) {
printk(KERN_ERR "hfs: failed to load catalog file\n");
goto cleanup;
}
HFSPLUS_SB(sb).alloc_file = iget(sb, HFSPLUS_ALLOC_CNID);
if (!HFSPLUS_SB(sb).alloc_file) {
printk(KERN_ERR "hfs: failed to load allocation file\n");
goto cleanup;
}
/* Load the root directory */
root = iget(sb, HFSPLUS_ROOT_CNID);
sb->s_root = d_alloc_root(root);
if (!sb->s_root) {
printk(KERN_ERR "hfs: failed to load root directory\n");
iput(root);
goto cleanup;
}
sb->s_root->d_op = &hfsplus_dentry_operations;
str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
str.name = HFSP_HIDDENDIR_NAME;
hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
hfs_find_exit(&fd);
if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
goto cleanup;
HFSPLUS_SB(sb).hidden_dir = iget(sb, be32_to_cpu(entry.folder.id));
if (!HFSPLUS_SB(sb).hidden_dir)
goto cleanup;
} else
hfs_find_exit(&fd);
if (sb->s_flags & MS_RDONLY)
goto out;
/* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
* all three are registered with Apple for our use
*/
vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
vhdr->modify_date = hfsp_now2mt();
vhdr->write_count = cpu_to_be32(be32_to_cpu(vhdr->write_count) + 1);
vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
if (!HFSPLUS_SB(sb).hidden_dir) {
printk(KERN_DEBUG "hfs: create hidden dir...\n");
HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
&str, HFSPLUS_SB(sb).hidden_dir);
mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
}
out:
unload_nls(sbi->nls);
sbi->nls = nls;
return 0;
cleanup:
hfsplus_put_super(sb);
if (nls)
unload_nls(nls);
return err;
}
MODULE_AUTHOR("Brad Boyer");
MODULE_DESCRIPTION("Extended Macintosh Filesystem");
MODULE_LICENSE("GPL");
static struct kmem_cache *hfsplus_inode_cachep;
static struct inode *hfsplus_alloc_inode(struct super_block *sb)
{
struct hfsplus_inode_info *i;
i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
return i ? &i->vfs_inode : NULL;
}
static void hfsplus_destroy_inode(struct inode *inode)
{
kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
}
#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
static int hfsplus_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data,
struct vfsmount *mnt)
{
return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
mnt);
}
static struct file_system_type hfsplus_fs_type = {
.owner = THIS_MODULE,
.name = "hfsplus",
.get_sb = hfsplus_get_sb,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
static void hfsplus_init_once(void *p, struct kmem_cache *cachep, unsigned long flags)
{
struct hfsplus_inode_info *i = p;
inode_init_once(&i->vfs_inode);
}
static int __init init_hfsplus_fs(void)
{
int err;
hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
hfsplus_init_once);
if (!hfsplus_inode_cachep)
return -ENOMEM;
err = register_filesystem(&hfsplus_fs_type);
if (err)
kmem_cache_destroy(hfsplus_inode_cachep);
return err;
}
static void __exit exit_hfsplus_fs(void)
{
unregister_filesystem(&hfsplus_fs_type);
kmem_cache_destroy(hfsplus_inode_cachep);
}
module_init(init_hfsplus_fs)
module_exit(exit_hfsplus_fs)