518 lines
15 KiB
C
518 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"
|
|
|
|
struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
|
|
{
|
|
struct hfs_find_data fd;
|
|
struct hfsplus_vh *vhdr;
|
|
struct inode *inode;
|
|
long err = -EIO;
|
|
|
|
inode = iget_locked(sb, ino);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
if (!(inode->i_state & I_NEW))
|
|
return inode;
|
|
|
|
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;
|
|
goto done;
|
|
}
|
|
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;
|
|
}
|
|
|
|
done:
|
|
unlock_new_inode(inode);
|
|
return inode;
|
|
|
|
bad_inode:
|
|
iget_failed(inode);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
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,
|
|
.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, *inode;
|
|
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;
|
|
}
|
|
|
|
inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
|
|
if (IS_ERR(inode)) {
|
|
printk(KERN_ERR "hfs: failed to load allocation file\n");
|
|
err = PTR_ERR(inode);
|
|
goto cleanup;
|
|
}
|
|
HFSPLUS_SB(sb).alloc_file = inode;
|
|
|
|
/* Load the root directory */
|
|
root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
|
|
if (IS_ERR(root)) {
|
|
printk(KERN_ERR "hfs: failed to load root directory\n");
|
|
err = PTR_ERR(root);
|
|
goto cleanup;
|
|
}
|
|
sb->s_root = d_alloc_root(root);
|
|
if (!sb->s_root) {
|
|
iput(root);
|
|
err = -ENOMEM;
|
|
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;
|
|
inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
goto cleanup;
|
|
}
|
|
HFSPLUS_SB(sb).hidden_dir = inode;
|
|
} 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(struct kmem_cache *cachep, void *p)
|
|
{
|
|
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)
|