inode.c

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/*
 *  linux/fs/hfs/inode.c
 *
 * Copyright (C) 1995-1997  Paul H. Hargrove
 * (C) 2003 Ardis Technologies <[email protected]>
 * This file may be distributed under the terms of the GNU General Public License.
 *
 * This file contains inode-related functions which do not depend on
 * which scheme is being used to represent forks.
 *
 * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
 */

#include <linux/pagemap.h>
#include <linux/mpage.h>
#include <linux/sched.h>

#include "hfs_fs.h"
#include "btree.h"

static const struct file_operations hfs_file_operations;
static const struct inode_operations hfs_file_inode_operations;

/*================ Variable-like macros ================*/

#define HFS_VALID_MODE_BITS  (S_IFREG | S_IFDIR | S_IRWXUGO)

static int hfs_writepage(struct page *page, struct writeback_control *wbc)
{
    return block_write_full_page(page, hfs_get_block, wbc);
}

static int hfs_readpage(struct file *file, struct page *page)
{
    return block_read_full_page(page, hfs_get_block);
}

static int hfs_write_begin(struct file *file, struct address_space *mapping,
            loff_t pos, unsigned len, unsigned flags,
            struct page **pagep, void **fsdata)
{
    int ret;

    *pagep = NULL;
    ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
                hfs_get_block,
                &HFS_I(mapping->host)->phys_size);
    if (unlikely(ret)) {
        loff_t isize = mapping->host->i_size;
        if (pos + len > isize)
            vmtruncate(mapping->host, isize);
    }

    return ret;
}

static sector_t hfs_bmap(struct address_space *mapping, sector_t block)
{
    return generic_block_bmap(mapping, block, hfs_get_block);
}

static int hfs_releasepage(struct page *page, gfp_t mask)
{
    struct inode *inode = page->mapping->host;
    struct super_block *sb = inode->i_sb;
    struct hfs_btree *tree;
    struct hfs_bnode *node;
    u32 nidx;
    int i, res = 1;

    switch (inode->i_ino) {
    case HFS_EXT_CNID:
        tree = HFS_SB(sb)->ext_tree;
        break;
    case HFS_CAT_CNID:
        tree = HFS_SB(sb)->cat_tree;
        break;
    default:
        BUG();
        return 0;
    }

    if (!tree)
        return 0;

    if (tree->node_size >= PAGE_CACHE_SIZE) {
        nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
        spin_lock(&tree->hash_lock);
        node = hfs_bnode_findhash(tree, nidx);
        if (!node)
            ;
        else if (atomic_read(&node->refcnt))
            res = 0;
        if (res && node) {
            hfs_bnode_unhash(node);
            hfs_bnode_free(node);
        }
        spin_unlock(&tree->hash_lock);
    } else {
        nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
        i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
        spin_lock(&tree->hash_lock);
        do {
            node = hfs_bnode_findhash(tree, nidx++);
            if (!node)
                continue;
            if (atomic_read(&node->refcnt)) {
                res = 0;
                break;
            }
            hfs_bnode_unhash(node);
            hfs_bnode_free(node);
        } while (--i && nidx < tree->node_count);
        spin_unlock(&tree->hash_lock);
    }
    return res ? try_to_free_buffers(page) : 0;
}

static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
        const struct iovec *iov, loff_t offset, unsigned long nr_segs)
{
    struct file *file = iocb->ki_filp;
    struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
    ssize_t ret;

    ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
                 hfs_get_block);

    /*
     * In case of error extending write may have instantiated a few
     * blocks outside i_size. Trim these off again.
     */
    if (unlikely((rw & WRITE) && ret < 0)) {
        loff_t isize = i_size_read(inode);
        loff_t end = offset + iov_length(iov, nr_segs);

        if (end > isize)
            vmtruncate(inode, isize);
    }

    return ret;
}

static int hfs_writepages(struct address_space *mapping,
              struct writeback_control *wbc)
{
    return mpage_writepages(mapping, wbc, hfs_get_block);
}

const struct address_space_operations hfs_btree_aops = {
    .readpage   = hfs_readpage,
    .writepage  = hfs_writepage,
    .write_begin    = hfs_write_begin,
    .write_end  = generic_write_end,
    .bmap       = hfs_bmap,
    .releasepage    = hfs_releasepage,
};

const struct address_space_operations hfs_aops = {
    .readpage   = hfs_readpage,
    .writepage  = hfs_writepage,
    .write_begin    = hfs_write_begin,
    .write_end  = generic_write_end,
    .bmap       = hfs_bmap,
    .direct_IO  = hfs_direct_IO,
    .writepages = hfs_writepages,
};

/*
 * hfs_new_inode
 */
struct inode *hfs_new_inode(struct inode *dir, struct qstr *name, umode_t mode)
{
    struct super_block *sb = dir->i_sb;
    struct inode *inode = new_inode(sb);
    if (!inode)
        return NULL;

    mutex_init(&HFS_I(inode)->extents_lock);
    INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);
    hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name);
    inode->i_ino = HFS_SB(sb)->next_id++;
    inode->i_mode = mode;
    inode->i_uid = current_fsuid();
    inode->i_gid = current_fsgid();
    set_nlink(inode, 1);
    inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
    HFS_I(inode)->flags = 0;
    HFS_I(inode)->rsrc_inode = NULL;
    HFS_I(inode)->fs_blocks = 0;
    if (S_ISDIR(mode)) {
        inode->i_size = 2;
        HFS_SB(sb)->folder_count++;
        if (dir->i_ino == HFS_ROOT_CNID)
            HFS_SB(sb)->root_dirs++;
        inode->i_op = &hfs_dir_inode_operations;
        inode->i_fop = &hfs_dir_operations;
        inode->i_mode |= S_IRWXUGO;
        inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask;
    } else if (S_ISREG(mode)) {
        HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks;
        HFS_SB(sb)->file_count++;
        if (dir->i_ino == HFS_ROOT_CNID)
            HFS_SB(sb)->root_files++;
        inode->i_op = &hfs_file_inode_operations;
        inode->i_fop = &hfs_file_operations;
        inode->i_mapping->a_ops = &hfs_aops;
        inode->i_mode |= S_IRUGO|S_IXUGO;
        if (mode & S_IWUSR)
            inode->i_mode |= S_IWUGO;
        inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask;
        HFS_I(inode)->phys_size = 0;
        HFS_I(inode)->alloc_blocks = 0;
        HFS_I(inode)->first_blocks = 0;
        HFS_I(inode)->cached_start = 0;
        HFS_I(inode)->cached_blocks = 0;
        memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec));
        memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec));
    }
    insert_inode_hash(inode);
    mark_inode_dirty(inode);
    set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
    hfs_mark_mdb_dirty(sb);

    return inode;
}

void hfs_delete_inode(struct inode *inode)
{
    struct super_block *sb = inode->i_sb;

    dprint(DBG_INODE, "delete_inode: %lu\n", inode->i_ino);
    if (S_ISDIR(inode->i_mode)) {
        HFS_SB(sb)->folder_count--;
        if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID))
            HFS_SB(sb)->root_dirs--;
        set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
        hfs_mark_mdb_dirty(sb);
        return;
    }
    HFS_SB(sb)->file_count--;
    if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID))
        HFS_SB(sb)->root_files--;
    if (S_ISREG(inode->i_mode)) {
        if (!inode->i_nlink) {
            inode->i_size = 0;
            hfs_file_truncate(inode);
        }
    }
    set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
    hfs_mark_mdb_dirty(sb);
}

void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
             __be32 __log_size, __be32 phys_size, u32 clump_size)
{
    struct super_block *sb = inode->i_sb;
    u32 log_size = be32_to_cpu(__log_size);
    u16 count;
    int i;

    memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec));
    for (count = 0, i = 0; i < 3; i++)
        count += be16_to_cpu(ext[i].count);
    HFS_I(inode)->first_blocks = count;

    inode->i_size = HFS_I(inode)->phys_size = log_size;
    HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
    inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits);
    HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) /
                     HFS_SB(sb)->alloc_blksz;
    HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz;
    if (!HFS_I(inode)->clump_blocks)
        HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks;
}

struct hfs_iget_data {
    struct hfs_cat_key *key;
    hfs_cat_rec *rec;
};

static int hfs_test_inode(struct inode *inode, void *data)
{
    struct hfs_iget_data *idata = data;
    hfs_cat_rec *rec;

    rec = idata->rec;
    switch (rec->type) {
    case HFS_CDR_DIR:
        return inode->i_ino == be32_to_cpu(rec->dir.DirID);
    case HFS_CDR_FIL:
        return inode->i_ino == be32_to_cpu(rec->file.FlNum);
    default:
        BUG();
        return 1;
    }
}

/*
 * hfs_read_inode
 */
static int hfs_read_inode(struct inode *inode, void *data)
{
    struct hfs_iget_data *idata = data;
    struct hfs_sb_info *hsb = HFS_SB(inode->i_sb);
    hfs_cat_rec *rec;

    HFS_I(inode)->flags = 0;
    HFS_I(inode)->rsrc_inode = NULL;
    mutex_init(&HFS_I(inode)->extents_lock);
    INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);

    /* Initialize the inode */
    inode->i_uid = hsb->s_uid;
    inode->i_gid = hsb->s_gid;
    set_nlink(inode, 1);

    if (idata->key)
        HFS_I(inode)->cat_key = *idata->key;
    else
        HFS_I(inode)->flags |= HFS_FLG_RSRC;
    HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60;

    rec = idata->rec;
    switch (rec->type) {
    case HFS_CDR_FIL:
        if (!HFS_IS_RSRC(inode)) {
            hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen,
                        rec->file.PyLen, be16_to_cpu(rec->file.ClpSize));
        } else {
            hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen,
                        rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize));
        }

        inode->i_ino = be32_to_cpu(rec->file.FlNum);
        inode->i_mode = S_IRUGO | S_IXUGO;
        if (!(rec->file.Flags & HFS_FIL_LOCK))
            inode->i_mode |= S_IWUGO;
        inode->i_mode &= ~hsb->s_file_umask;
        inode->i_mode |= S_IFREG;
        inode->i_ctime = inode->i_atime = inode->i_mtime =
                hfs_m_to_utime(rec->file.MdDat);
        inode->i_op = &hfs_file_inode_operations;
        inode->i_fop = &hfs_file_operations;
        inode->i_mapping->a_ops = &hfs_aops;
        break;
    case HFS_CDR_DIR:
        inode->i_ino = be32_to_cpu(rec->dir.DirID);
        inode->i_size = be16_to_cpu(rec->dir.Val) + 2;
        HFS_I(inode)->fs_blocks = 0;
        inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask);
        inode->i_ctime = inode->i_atime = inode->i_mtime =
                hfs_m_to_utime(rec->dir.MdDat);
        inode->i_op = &hfs_dir_inode_operations;
        inode->i_fop = &hfs_dir_operations;
        break;
    default:
        make_bad_inode(inode);
    }
    return 0;
}

/*
 * __hfs_iget()
 *
 * Given the MDB for a HFS filesystem, a 'key' and an 'entry' in
 * the catalog B-tree and the 'type' of the desired file return the
 * inode for that file/directory or NULL.  Note that 'type' indicates
 * whether we want the actual file or directory, or the corresponding
 * metadata (AppleDouble header file or CAP metadata file).
 */
struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec)
{
    struct hfs_iget_data data = { key, rec };
    struct inode *inode;
    u32 cnid;

    switch (rec->type) {
    case HFS_CDR_DIR:
        cnid = be32_to_cpu(rec->dir.DirID);
        break;
    case HFS_CDR_FIL:
        cnid = be32_to_cpu(rec->file.FlNum);
        break;
    default:
        return NULL;
    }
    inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data);
    if (inode && (inode->i_state & I_NEW))
        unlock_new_inode(inode);
    return inode;
}

void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext,
              __be32 *log_size, __be32 *phys_size)
{
    memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec));

    if (log_size)
        *log_size = cpu_to_be32(inode->i_size);
    if (phys_size)
        *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks *
                     HFS_SB(inode->i_sb)->alloc_blksz);
}

int hfs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
    struct inode *main_inode = inode;
    struct hfs_find_data fd;
    hfs_cat_rec rec;

    dprint(DBG_INODE, "hfs_write_inode: %lu\n", inode->i_ino);
    hfs_ext_write_extent(inode);

    if (inode->i_ino < HFS_FIRSTUSER_CNID) {
        switch (inode->i_ino) {
        case HFS_ROOT_CNID:
            break;
        case HFS_EXT_CNID:
            hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree);
            return 0;
        case HFS_CAT_CNID:
            hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree);
            return 0;
        default:
            BUG();
            return -EIO;
        }
    }

    if (HFS_IS_RSRC(inode))
        main_inode = HFS_I(inode)->rsrc_inode;

    if (!main_inode->i_nlink)
        return 0;

    if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd))
        /* panic? */
        return -EIO;

    fd.search_key->cat = HFS_I(main_inode)->cat_key;
    if (hfs_brec_find(&fd))
        /* panic? */
        goto out;

    if (S_ISDIR(main_inode->i_mode)) {
        if (fd.entrylength < sizeof(struct hfs_cat_dir))
            /* panic? */;
        hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
               sizeof(struct hfs_cat_dir));
        if (rec.type != HFS_CDR_DIR ||
            be32_to_cpu(rec.dir.DirID) != inode->i_ino) {
        }

        rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime);
        rec.dir.Val = cpu_to_be16(inode->i_size - 2);

        hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
                sizeof(struct hfs_cat_dir));
    } else if (HFS_IS_RSRC(inode)) {
        hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
                   sizeof(struct hfs_cat_file));
        hfs_inode_write_fork(inode, rec.file.RExtRec,
                     &rec.file.RLgLen, &rec.file.RPyLen);
        hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
                sizeof(struct hfs_cat_file));
    } else {
        if (fd.entrylength < sizeof(struct hfs_cat_file))
            /* panic? */;
        hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
               sizeof(struct hfs_cat_file));
        if (rec.type != HFS_CDR_FIL ||
            be32_to_cpu(rec.file.FlNum) != inode->i_ino) {
        }

        if (inode->i_mode & S_IWUSR)
            rec.file.Flags &= ~HFS_FIL_LOCK;
        else
            rec.file.Flags |= HFS_FIL_LOCK;
        hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen);
        rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime);

        hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
                sizeof(struct hfs_cat_file));
    }
out:
    hfs_find_exit(&fd);
    return 0;
}

static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry,
                      unsigned int flags)
{
    struct inode *inode = NULL;
    hfs_cat_rec rec;
    struct hfs_find_data fd;
    int res;

    if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
        goto out;

    inode = HFS_I(dir)->rsrc_inode;
    if (inode)
        goto out;

    inode = new_inode(dir->i_sb);
    if (!inode)
        return ERR_PTR(-ENOMEM);

    hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd);
    fd.search_key->cat = HFS_I(dir)->cat_key;
    res = hfs_brec_read(&fd, &rec, sizeof(rec));
    if (!res) {
        struct hfs_iget_data idata = { NULL, &rec };
        hfs_read_inode(inode, &idata);
    }
    hfs_find_exit(&fd);
    if (res) {
        iput(inode);
        return ERR_PTR(res);
    }
    HFS_I(inode)->rsrc_inode = dir;
    HFS_I(dir)->rsrc_inode = inode;
    igrab(dir);
    hlist_add_fake(&inode->i_hash);
    mark_inode_dirty(inode);
out:
    d_add(dentry, inode);
    return NULL;
}

void hfs_evict_inode(struct inode *inode)
{
    truncate_inode_pages(&inode->i_data, 0);
    clear_inode(inode);
    if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) {
        HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
        iput(HFS_I(inode)->rsrc_inode);
    }
}

static int hfs_file_open(struct inode *inode, struct file *file)
{
    if (HFS_IS_RSRC(inode))
        inode = HFS_I(inode)->rsrc_inode;
    atomic_inc(&HFS_I(inode)->opencnt);
    return 0;
}

static int hfs_file_release(struct inode *inode, struct file *file)
{
    //struct super_block *sb = inode->i_sb;

    if (HFS_IS_RSRC(inode))
        inode = HFS_I(inode)->rsrc_inode;
    if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) {
        mutex_lock(&inode->i_mutex);
        hfs_file_truncate(inode);
        //if (inode->i_flags & S_DEAD) {
        //  hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
        //  hfs_delete_inode(inode);
        //}
        mutex_unlock(&inode->i_mutex);
    }
    return 0;
}

/*
 * hfs_notify_change()
 *
 * Based very closely on fs/msdos/inode.c by Werner Almesberger
 *
 * This is the notify_change() field in the super_operations structure
 * for HFS file systems.  The purpose is to take that changes made to
 * an inode and apply then in a filesystem-dependent manner.  In this
 * case the process has a few of tasks to do:
 *  1) prevent changes to the i_uid and i_gid fields.
 *  2) map file permissions to the closest allowable permissions
 *  3) Since multiple Linux files can share the same on-disk inode under
 *     HFS (for instance the data and resource forks of a file) a change
 *     to permissions must be applied to all other in-core inodes which
 *     correspond to the same HFS file.
 */

int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
{
    struct inode *inode = dentry->d_inode;
    struct hfs_sb_info *hsb = HFS_SB(inode->i_sb);
    int error;

    error = inode_change_ok(inode, attr); /* basic permission checks */
    if (error)
        return error;

    /* no uig/gid changes and limit which mode bits can be set */
    if (((attr->ia_valid & ATTR_UID) &&
         (!uid_eq(attr->ia_uid, hsb->s_uid))) ||
        ((attr->ia_valid & ATTR_GID) &&
         (!gid_eq(attr->ia_gid, hsb->s_gid))) ||
        ((attr->ia_valid & ATTR_MODE) &&
         ((S_ISDIR(inode->i_mode) &&
           (attr->ia_mode != inode->i_mode)) ||
          (attr->ia_mode & ~HFS_VALID_MODE_BITS)))) {
        return hsb->s_quiet ? 0 : error;
    }

    if (attr->ia_valid & ATTR_MODE) {
        /* Only the 'w' bits can ever change and only all together. */
        if (attr->ia_mode & S_IWUSR)
            attr->ia_mode = inode->i_mode | S_IWUGO;
        else
            attr->ia_mode = inode->i_mode & ~S_IWUGO;
        attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask;
    }

    if ((attr->ia_valid & ATTR_SIZE) &&
        attr->ia_size != i_size_read(inode)) {
        inode_dio_wait(inode);

        error = vmtruncate(inode, attr->ia_size);
        if (error)
            return error;
    }

    setattr_copy(inode, attr);
    mark_inode_dirty(inode);
    return 0;
}

static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end,
              int datasync)
{
    struct inode *inode = filp->f_mapping->host;
    struct super_block * sb;
    int ret, err;

    ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
    if (ret)
        return ret;
    mutex_lock(&inode->i_mutex);

    /* sync the inode to buffers */
    ret = write_inode_now(inode, 0);

    /* sync the superblock to buffers */
    sb = inode->i_sb;
    flush_delayed_work(&HFS_SB(sb)->mdb_work);
    /* .. finally sync the buffers to disk */
    err = sync_blockdev(sb->s_bdev);
    if (!ret)
        ret = err;
    mutex_unlock(&inode->i_mutex);
    return ret;
}

static const struct file_operations hfs_file_operations = {
    .llseek     = generic_file_llseek,
    .read       = do_sync_read,
    .aio_read   = generic_file_aio_read,
    .write      = do_sync_write,
    .aio_write  = generic_file_aio_write,
    .mmap       = generic_file_mmap,
    .splice_read    = generic_file_splice_read,
    .fsync      = hfs_file_fsync,
    .open       = hfs_file_open,
    .release    = hfs_file_release,
};

static const struct inode_operations hfs_file_inode_operations = {
    .lookup     = hfs_file_lookup,
    .truncate   = hfs_file_truncate,
    .setattr    = hfs_inode_setattr,
    .setxattr   = hfs_setxattr,
    .getxattr   = hfs_getxattr,
    .listxattr  = hfs_listxattr,
};