diff options
Diffstat (limited to 'fs/hfsplus/super.c')
| -rw-r--r-- | fs/hfsplus/super.c | 707 |
1 files changed, 707 insertions, 0 deletions
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c new file mode 100644 index 000000000..eb4535eba --- /dev/null +++ b/fs/hfsplus/super.c @@ -0,0 +1,707 @@ +/* + * 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/blkdev.h> +#include <linux/backing-dev.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" +#include "xattr.h" + +static int hfsplus_system_read_inode(struct inode *inode) +{ + struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; + + switch (inode->i_ino) { + 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: + return -EIO; + } + + return 0; +} + +struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) +{ + struct hfs_find_data fd; + struct inode *inode; + int err; + + 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); + spin_lock_init(&HFSPLUS_I(inode)->open_dir_lock); + mutex_init(&HFSPLUS_I(inode)->extents_lock); + HFSPLUS_I(inode)->flags = 0; + HFSPLUS_I(inode)->extent_state = 0; + HFSPLUS_I(inode)->rsrc_inode = NULL; + atomic_set(&HFSPLUS_I(inode)->opencnt, 0); + + if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || + inode->i_ino == HFSPLUS_ROOT_CNID) { + err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); + if (!err) { + err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); + if (!err) + err = hfsplus_cat_read_inode(inode, &fd); + hfs_find_exit(&fd); + } + } else { + err = hfsplus_system_read_inode(inode); + } + + if (err) { + iget_failed(inode); + return ERR_PTR(err); + } + + unlock_new_inode(inode); + return inode; +} + +static int hfsplus_system_write_inode(struct inode *inode) +{ + struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); + struct hfsplus_vh *vhdr = sbi->s_vhdr; + struct hfsplus_fork_raw *fork; + struct hfs_btree *tree = NULL; + + switch (inode->i_ino) { + case HFSPLUS_EXT_CNID: + fork = &vhdr->ext_file; + tree = sbi->ext_tree; + break; + case HFSPLUS_CAT_CNID: + fork = &vhdr->cat_file; + tree = sbi->cat_tree; + break; + case HFSPLUS_ALLOC_CNID: + fork = &vhdr->alloc_file; + break; + case HFSPLUS_START_CNID: + fork = &vhdr->start_file; + break; + case HFSPLUS_ATTR_CNID: + fork = &vhdr->attr_file; + tree = sbi->attr_tree; + break; + default: + return -EIO; + } + + if (fork->total_size != cpu_to_be64(inode->i_size)) { + set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); + hfsplus_mark_mdb_dirty(inode->i_sb); + } + hfsplus_inode_write_fork(inode, fork); + if (tree) { + int err = hfs_btree_write(tree); + + if (err) { + pr_err("b-tree write err: %d, ino %lu\n", + err, inode->i_ino); + return err; + } + } + return 0; +} + +static int hfsplus_write_inode(struct inode *inode, + struct writeback_control *wbc) +{ + int err; + + hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); + + err = hfsplus_ext_write_extent(inode); + if (err) + return err; + + if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || + inode->i_ino == HFSPLUS_ROOT_CNID) + return hfsplus_cat_write_inode(inode); + else + return hfsplus_system_write_inode(inode); +} + +static void hfsplus_evict_inode(struct inode *inode) +{ + hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); + truncate_inode_pages_final(&inode->i_data); + clear_inode(inode); + if (HFSPLUS_IS_RSRC(inode)) { + HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; + iput(HFSPLUS_I(inode)->rsrc_inode); + } +} + +static int hfsplus_sync_fs(struct super_block *sb, int wait) +{ + struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); + struct hfsplus_vh *vhdr = sbi->s_vhdr; + int write_backup = 0; + int error, error2; + + if (!wait) + return 0; + + hfs_dbg(SUPER, "hfsplus_sync_fs\n"); + + /* + * Explicitly write out the special metadata inodes. + * + * While these special inodes are marked as hashed and written + * out peridocically by the flusher threads we redirty them + * during writeout of normal inodes, and thus the life lock + * prevents us from getting the latest state to disk. + */ + error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); + error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); + if (!error) + error = error2; + if (sbi->attr_tree) { + error2 = + filemap_write_and_wait(sbi->attr_tree->inode->i_mapping); + if (!error) + error = error2; + } + error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); + if (!error) + error = error2; + + mutex_lock(&sbi->vh_mutex); + mutex_lock(&sbi->alloc_mutex); + vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); + vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); + vhdr->folder_count = cpu_to_be32(sbi->folder_count); + vhdr->file_count = cpu_to_be32(sbi->file_count); + + if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { + memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); + write_backup = 1; + } + + error2 = hfsplus_submit_bio(sb, + sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, + sbi->s_vhdr_buf, NULL, REQ_OP_WRITE, + REQ_SYNC); + if (!error) + error = error2; + if (!write_backup) + goto out; + + error2 = hfsplus_submit_bio(sb, + sbi->part_start + sbi->sect_count - 2, + sbi->s_backup_vhdr_buf, NULL, REQ_OP_WRITE, + REQ_SYNC); + if (!error) + error2 = error; +out: + mutex_unlock(&sbi->alloc_mutex); + mutex_unlock(&sbi->vh_mutex); + + if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) + blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); + + return error; +} + +static void delayed_sync_fs(struct work_struct *work) +{ + int err; + struct hfsplus_sb_info *sbi; + + sbi = container_of(work, struct hfsplus_sb_info, sync_work.work); + + spin_lock(&sbi->work_lock); + sbi->work_queued = 0; + spin_unlock(&sbi->work_lock); + + err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); + if (err) + pr_err("delayed sync fs err %d\n", err); +} + +void hfsplus_mark_mdb_dirty(struct super_block *sb) +{ + struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); + unsigned long delay; + + if (sb_rdonly(sb)) + return; + + spin_lock(&sbi->work_lock); + if (!sbi->work_queued) { + delay = msecs_to_jiffies(dirty_writeback_interval * 10); + queue_delayed_work(system_long_wq, &sbi->sync_work, delay); + sbi->work_queued = 1; + } + spin_unlock(&sbi->work_lock); +} + +static void hfsplus_put_super(struct super_block *sb) +{ + struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); + + hfs_dbg(SUPER, "hfsplus_put_super\n"); + + cancel_delayed_work_sync(&sbi->sync_work); + + if (!sb_rdonly(sb) && sbi->s_vhdr) { + struct hfsplus_vh *vhdr = sbi->s_vhdr; + + vhdr->modify_date = hfsp_now2mt(); + vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); + vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); + + hfsplus_sync_fs(sb, 1); + } + + hfs_btree_close(sbi->attr_tree); + hfs_btree_close(sbi->cat_tree); + hfs_btree_close(sbi->ext_tree); + iput(sbi->alloc_file); + iput(sbi->hidden_dir); + kfree(sbi->s_vhdr_buf); + kfree(sbi->s_backup_vhdr_buf); + unload_nls(sbi->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; + struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); + u64 id = huge_encode_dev(sb->s_bdev->bd_dev); + + buf->f_type = HFSPLUS_SUPER_MAGIC; + buf->f_bsize = sb->s_blocksize; + buf->f_blocks = sbi->total_blocks << sbi->fs_shift; + buf->f_bfree = sbi->free_blocks << sbi->fs_shift; + buf->f_bavail = buf->f_bfree; + buf->f_files = 0xFFFFFFFF; + buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; + buf->f_fsid.val[0] = (u32)id; + buf->f_fsid.val[1] = (u32)(id >> 32); + buf->f_namelen = HFSPLUS_MAX_STRLEN; + + return 0; +} + +static int hfsplus_remount(struct super_block *sb, int *flags, char *data) +{ + sync_filesystem(sb); + if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) + return 0; + if (!(*flags & SB_RDONLY)) { + struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; + int force = 0; + + if (!hfsplus_parse_options_remount(data, &force)) + return -EINVAL; + + if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { + pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n"); + sb->s_flags |= SB_RDONLY; + *flags |= SB_RDONLY; + } else if (force) { + /* nothing */ + } else if (vhdr->attributes & + cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { + pr_warn("filesystem is marked locked, leaving read-only.\n"); + sb->s_flags |= SB_RDONLY; + *flags |= SB_RDONLY; + } else if (vhdr->attributes & + cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { + pr_warn("filesystem is marked journaled, leaving read-only.\n"); + sb->s_flags |= SB_RDONLY; + *flags |= SB_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, + .evict_inode = hfsplus_evict_inode, + .put_super = hfsplus_put_super, + .sync_fs = hfsplus_sync_fs, + .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; + u64 last_fs_block, last_fs_page; + int err; + + err = -ENOMEM; + sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); + if (!sbi) + goto out; + + sb->s_fs_info = sbi; + mutex_init(&sbi->alloc_mutex); + mutex_init(&sbi->vh_mutex); + spin_lock_init(&sbi->work_lock); + INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); + hfsplus_fill_defaults(sbi); + + err = -EINVAL; + if (!hfsplus_parse_options(data, sbi)) { + pr_err("unable to parse mount options\n"); + goto out_unload_nls; + } + + /* temporarily use utf8 to correctly find the hidden dir below */ + nls = sbi->nls; + sbi->nls = load_nls("utf8"); + if (!sbi->nls) { + pr_err("unable to load nls for utf8\n"); + goto out_unload_nls; + } + + /* Grab the volume header */ + if (hfsplus_read_wrapper(sb)) { + if (!silent) + pr_warn("unable to find HFS+ superblock\n"); + goto out_unload_nls; + } + vhdr = sbi->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) { + pr_err("wrong filesystem version\n"); + goto out_free_vhdr; + } + sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); + sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); + sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); + sbi->file_count = be32_to_cpu(vhdr->file_count); + sbi->folder_count = be32_to_cpu(vhdr->folder_count); + sbi->data_clump_blocks = + be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; + if (!sbi->data_clump_blocks) + sbi->data_clump_blocks = 1; + sbi->rsrc_clump_blocks = + be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; + if (!sbi->rsrc_clump_blocks) + sbi->rsrc_clump_blocks = 1; + + err = -EFBIG; + last_fs_block = sbi->total_blocks - 1; + last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> + PAGE_SHIFT; + + if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || + (last_fs_page > (pgoff_t)(~0ULL))) { + pr_err("filesystem size too large\n"); + goto out_free_vhdr; + } + + /* 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))) { + pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n"); + sb->s_flags |= SB_RDONLY; + } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { + /* nothing */ + } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { + pr_warn("Filesystem is marked locked, mounting read-only.\n"); + sb->s_flags |= SB_RDONLY; + } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && + !sb_rdonly(sb)) { + pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n"); + sb->s_flags |= SB_RDONLY; + } + + err = -EINVAL; + + /* Load metadata objects (B*Trees) */ + sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); + if (!sbi->ext_tree) { + pr_err("failed to load extents file\n"); + goto out_free_vhdr; + } + sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); + if (!sbi->cat_tree) { + pr_err("failed to load catalog file\n"); + goto out_close_ext_tree; + } + atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE); + if (vhdr->attr_file.total_blocks != 0) { + sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID); + if (!sbi->attr_tree) { + pr_err("failed to load attributes file\n"); + goto out_close_cat_tree; + } + atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE); + } + sb->s_xattr = hfsplus_xattr_handlers; + + inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); + if (IS_ERR(inode)) { + pr_err("failed to load allocation file\n"); + err = PTR_ERR(inode); + goto out_close_attr_tree; + } + sbi->alloc_file = inode; + + /* Load the root directory */ + root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); + if (IS_ERR(root)) { + pr_err("failed to load root directory\n"); + err = PTR_ERR(root); + goto out_put_alloc_file; + } + + sb->s_d_op = &hfsplus_dentry_operations; + sb->s_root = d_make_root(root); + if (!sb->s_root) { + err = -ENOMEM; + goto out_put_alloc_file; + } + + str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; + str.name = HFSP_HIDDENDIR_NAME; + err = hfs_find_init(sbi->cat_tree, &fd); + if (err) + goto out_put_root; + err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); + if (unlikely(err < 0)) + goto out_put_root; + if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { + hfs_find_exit(&fd); + if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) { + err = -EINVAL; + goto out_put_root; + } + inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto out_put_root; + } + sbi->hidden_dir = inode; + } else + hfs_find_exit(&fd); + + if (!sb_rdonly(sb)) { + /* + * 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(); + be32_add_cpu(&vhdr->write_count, 1); + vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); + vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); + hfsplus_sync_fs(sb, 1); + + if (!sbi->hidden_dir) { + mutex_lock(&sbi->vh_mutex); + sbi->hidden_dir = hfsplus_new_inode(sb, root, S_IFDIR); + if (!sbi->hidden_dir) { + mutex_unlock(&sbi->vh_mutex); + err = -ENOMEM; + goto out_put_root; + } + err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root, + &str, sbi->hidden_dir); + if (err) { + mutex_unlock(&sbi->vh_mutex); + goto out_put_hidden_dir; + } + + err = hfsplus_init_security(sbi->hidden_dir, + root, &str); + if (err == -EOPNOTSUPP) + err = 0; /* Operation is not supported. */ + else if (err) { + /* + * Try to delete anyway without + * error analysis. + */ + hfsplus_delete_cat(sbi->hidden_dir->i_ino, + root, &str); + mutex_unlock(&sbi->vh_mutex); + goto out_put_hidden_dir; + } + + mutex_unlock(&sbi->vh_mutex); + hfsplus_mark_inode_dirty(sbi->hidden_dir, + HFSPLUS_I_CAT_DIRTY); + } + } + + unload_nls(sbi->nls); + sbi->nls = nls; + return 0; + +out_put_hidden_dir: + cancel_delayed_work_sync(&sbi->sync_work); + iput(sbi->hidden_dir); +out_put_root: + dput(sb->s_root); + sb->s_root = NULL; +out_put_alloc_file: + iput(sbi->alloc_file); +out_close_attr_tree: + hfs_btree_close(sbi->attr_tree); +out_close_cat_tree: + hfs_btree_close(sbi->cat_tree); +out_close_ext_tree: + hfs_btree_close(sbi->ext_tree); +out_free_vhdr: + kfree(sbi->s_vhdr_buf); + kfree(sbi->s_backup_vhdr_buf); +out_unload_nls: + unload_nls(sbi->nls); + unload_nls(nls); + kfree(sbi); +out: + 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_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + + kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); +} + +static void hfsplus_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, hfsplus_i_callback); +} + +#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) + +static struct dentry *hfsplus_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); +} + +static struct file_system_type hfsplus_fs_type = { + .owner = THIS_MODULE, + .name = "hfsplus", + .mount = hfsplus_mount, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; +MODULE_ALIAS_FS("hfsplus"); + +static void hfsplus_init_once(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|SLAB_ACCOUNT, + hfsplus_init_once); + if (!hfsplus_inode_cachep) + return -ENOMEM; + err = hfsplus_create_attr_tree_cache(); + if (err) + goto destroy_inode_cache; + err = register_filesystem(&hfsplus_fs_type); + if (err) + goto destroy_attr_tree_cache; + return 0; + +destroy_attr_tree_cache: + hfsplus_destroy_attr_tree_cache(); + +destroy_inode_cache: + kmem_cache_destroy(hfsplus_inode_cachep); + + return err; +} + +static void __exit exit_hfsplus_fs(void) +{ + unregister_filesystem(&hfsplus_fs_type); + + /* + * Make sure all delayed rcu free inodes are flushed before we + * destroy cache. + */ + rcu_barrier(); + hfsplus_destroy_attr_tree_cache(); + kmem_cache_destroy(hfsplus_inode_cachep); +} + +module_init(init_hfsplus_fs) +module_exit(exit_hfsplus_fs) |