コード例 #1
0
ファイル: inode.c プロジェクト: Abioy/kasan
/* caller should call f2fs_lock_op() */
void handle_failed_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

	clear_nlink(inode);
	make_bad_inode(inode);
	unlock_new_inode(inode);

	i_size_write(inode, 0);
	if (F2FS_HAS_BLOCKS(inode))
		f2fs_truncate(inode);

	remove_inode_page(inode);

	clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
	clear_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY);
	alloc_nid_failed(sbi, inode->i_ino);
	f2fs_unlock_op(sbi);

	/* iput will drop the inode object */
	iput(inode);
}
コード例 #2
0
static int gfs2_unlink_inode(struct gfs2_inode *dip,
			     const struct dentry *dentry)
{
	struct inode *inode = dentry->d_inode;
	struct gfs2_inode *ip = GFS2_I(inode);
	int error;

	error = gfs2_dir_del(dip, dentry);
	if (error)
		return error;

	ip->i_entries = 0;
	inode->i_ctime = CURRENT_TIME;
	if (S_ISDIR(inode->i_mode))
		clear_nlink(inode);
	else
		drop_nlink(inode);
	mark_inode_dirty(inode);
	if (inode->i_nlink == 0)
		gfs2_unlink_di(inode);
	return 0;
}
コード例 #3
0
ファイル: inode.c プロジェクト: weixu8/EncryptedFilesystem
static int wrapfs_rmdir(struct inode *dir, struct dentry *dentry)
{
	struct dentry *lower_dentry;
	struct dentry *lower_dir_dentry;
	int err;
	struct path lower_path;

	if(wrapfs_get_debug(dir->i_sb) & DEBUG_INODE)
		DEBUG_MESG("Enter");

	wrapfs_get_lower_path(dentry, &lower_path);
	lower_dentry = lower_path.dentry;
	lower_dir_dentry = lock_parent(lower_dentry);

	err = mnt_want_write(lower_path.mnt);
	if (err)
		goto out_unlock;
	err = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry);
	if (err)
		goto out;

	d_drop(dentry);	/* drop our dentry on success (why not VFS's job?) */
	if (dentry->d_inode)
		clear_nlink(dentry->d_inode);
	fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
	fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
	set_nlink(dir, lower_dir_dentry->d_inode->i_nlink);

out:
	mnt_drop_write(lower_path.mnt);
out_unlock:
	unlock_dir(lower_dir_dentry);
	wrapfs_put_lower_path(dentry, &lower_path);

	if(wrapfs_get_debug(dir->i_sb) & DEBUG_INODE)
		DEBUG_RETURN("Exit", err);

	return err;
}
コード例 #4
0
ファイル: inode.c プロジェクト: acton393/linux
static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry)
{
	struct dentry *lower_dentry;
	struct dentry *lower_dir_dentry;
	int rc;

	lower_dentry = ecryptfs_dentry_to_lower(dentry);
	dget(dentry);
	lower_dir_dentry = lock_parent(lower_dentry);
	dget(lower_dentry);
	rc = vfs_rmdir(d_inode(lower_dir_dentry), lower_dentry);
	dput(lower_dentry);
	if (!rc && d_really_is_positive(dentry))
		clear_nlink(d_inode(dentry));
	fsstack_copy_attr_times(dir, d_inode(lower_dir_dentry));
	set_nlink(dir, d_inode(lower_dir_dentry)->i_nlink);
	unlock_dir(lower_dir_dentry);
	if (!rc)
		d_drop(dentry);
	dput(dentry);
	return rc;
}
コード例 #5
0
ファイル: inode.c プロジェクト: Ante0/xxICSKernel
static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry)
{
	struct dentry *lower_dentry;
	struct dentry *lower_dir_dentry;
	int rc;

	lower_dentry = ecryptfs_dentry_to_lower(dentry);
	dget(dentry);
	lower_dir_dentry = lock_parent(lower_dentry);
	dget(lower_dentry);
	rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry);
	dput(lower_dentry);
	if (!rc && dentry->d_inode)
		clear_nlink(dentry->d_inode);
	fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
	dir->i_nlink = lower_dir_dentry->d_inode->i_nlink;
	unlock_dir(lower_dir_dentry);
	if (!rc)
		d_drop(dentry);
	dput(dentry);
	return rc;
}
コード例 #6
0
ファイル: inode.c プロジェクト: MrJwiz/UBER-M
/* caller should call f2fs_lock_op() */
void handle_failed_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	int err = 0;

	clear_nlink(inode);
	make_bad_inode(inode);
	unlock_new_inode(inode);

	i_size_write(inode, 0);
	if (F2FS_HAS_BLOCKS(inode))
		err = f2fs_truncate(inode, false);

	if (!err)
		err = remove_inode_page(inode);

	/*
	 * if we skip truncate_node in remove_inode_page bacause we failed
	 * before, it's better to find another way to release resource of
	 * this inode (e.g. valid block count, node block or nid). Here we
	 * choose to add this inode to orphan list, so that we can call iput
	 * for releasing in orphan recovery flow.
	 *
	 * Note: we should add inode to orphan list before f2fs_unlock_op()
	 * so we can prevent losing this orphan when encoutering checkpoint
	 * and following suddenly power-off.
	 */
	if (err && err != -ENOENT) {
		err = acquire_orphan_inode(sbi);
		if (!err)
			add_orphan_inode(sbi, inode->i_ino);
	}

	set_inode_flag(F2FS_I(inode), FI_FREE_NID);
	f2fs_unlock_op(sbi);

	/* iput will drop the inode object */
	iput(inode);
}
コード例 #7
0
ファイル: namei.c プロジェクト: b99/android_kernel_d1_p1_old
static int f2fs_create(struct inode *dir, struct dentry *dentry, int mode,
                       struct nameidata *nd)
{
    struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
    struct inode *inode;
    nid_t ino = 0;
    int err;

    f2fs_balance_fs(sbi);

    inode = f2fs_new_inode(dir, mode);
    if (IS_ERR(inode))
        return PTR_ERR(inode);

    if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
        set_cold_files(sbi, inode, dentry->d_name.name);

    inode->i_op = &f2fs_file_inode_operations;
    inode->i_fop = &f2fs_file_operations;
    inode->i_mapping->a_ops = &f2fs_dblock_aops;
    ino = inode->i_ino;

    f2fs_lock_op(sbi);
    err = f2fs_add_link(dentry, inode);
    f2fs_unlock_op(sbi);
    if (err)
        goto out;

    alloc_nid_done(sbi, ino);

    d_instantiate(dentry, inode);
    unlock_new_inode(inode);
    return 0;
out:
    clear_nlink(inode);
    iget_failed(inode);
    alloc_nid_failed(sbi, ino);
    return err;
}
コード例 #8
0
ファイル: namei.c プロジェクト: 7799/linux
static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
				umode_t mode, dev_t rdev)
{
	struct super_block *sb = dir->i_sb;
	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	struct inode *inode;
	int err = 0;

	if (!new_valid_dev(rdev))
		return -EINVAL;

	f2fs_balance_fs(sbi);

	inode = f2fs_new_inode(dir, mode);
	if (IS_ERR(inode))
		return PTR_ERR(inode);

	init_special_inode(inode, inode->i_mode, rdev);
	inode->i_op = &f2fs_special_inode_operations;

	f2fs_lock_op(sbi);
	err = f2fs_add_link(dentry, inode);
	f2fs_unlock_op(sbi);
	if (err)
		goto out;

	alloc_nid_done(sbi, inode->i_ino);
	d_instantiate(dentry, inode);
	unlock_new_inode(inode);
	return 0;
out:
	clear_nlink(inode);
	unlock_new_inode(inode);
	make_bad_inode(inode);
	iput(inode);
	alloc_nid_failed(sbi, inode->i_ino);
	return err;
}
コード例 #9
0
ファイル: namei.c プロジェクト: 7799/linux
static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
					const char *symname)
{
	struct super_block *sb = dir->i_sb;
	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	struct inode *inode;
	size_t symlen = strlen(symname) + 1;
	int err;

	f2fs_balance_fs(sbi);

	inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
	if (IS_ERR(inode))
		return PTR_ERR(inode);

	inode->i_op = &f2fs_symlink_inode_operations;
	inode->i_mapping->a_ops = &f2fs_dblock_aops;

	f2fs_lock_op(sbi);
	err = f2fs_add_link(dentry, inode);
	f2fs_unlock_op(sbi);
	if (err)
		goto out;

	err = page_symlink(inode, symname, symlen);
	alloc_nid_done(sbi, inode->i_ino);

	d_instantiate(dentry, inode);
	unlock_new_inode(inode);
	return err;
out:
	clear_nlink(inode);
	unlock_new_inode(inode);
	make_bad_inode(inode);
	iput(inode);
	alloc_nid_failed(sbi, inode->i_ino);
	return err;
}
コード例 #10
0
ファイル: dir.c プロジェクト: faddat/linux-mainline-next
/*
 * remove a directory from an AFS filesystem
 */
static int afs_rmdir(struct inode *dir, struct dentry *dentry)
{
	struct afs_vnode *dvnode, *vnode;
	struct key *key;
	int ret;

	dvnode = AFS_FS_I(dir);

	_enter("{%x:%u},{%pd}",
	       dvnode->fid.vid, dvnode->fid.vnode, dentry);

	key = afs_request_key(dvnode->volume->cell);
	if (IS_ERR(key)) {
		ret = PTR_ERR(key);
		goto error;
	}

	ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, true);
	if (ret < 0)
		goto rmdir_error;

	if (d_really_is_positive(dentry)) {
		vnode = AFS_FS_I(d_inode(dentry));
		clear_nlink(&vnode->vfs_inode);
		set_bit(AFS_VNODE_DELETED, &vnode->flags);
		afs_discard_callback_on_delete(vnode);
	}

	key_put(key);
	_leave(" = 0");
	return 0;

rmdir_error:
	key_put(key);
error:
	_leave(" = %d", ret);
	return ret;
}
コード例 #11
0
ファイル: dir.c プロジェクト: rrowicki/Chrono_Kernel-1
static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
{
	struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
	struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
	struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
	struct jffs2_full_dirent *fd;
	int ret;
	uint32_t now = get_seconds();

	for (fd = f->dents ; fd; fd = fd->next) {
		if (fd->ino)
			return -ENOTEMPTY;
	}

	ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
			      dentry->d_name.len, f, now);
	if (!ret) {
		dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
		clear_nlink(dentry->d_inode);
		drop_nlink(dir_i);
	}
	return ret;
}
コード例 #12
0
ファイル: namei.c プロジェクト: xiandaicxsj/copyKvm
/***** Unlink a file */
static int msdos_unlink(struct inode *dir, struct dentry *dentry)
{
	struct inode *inode = dentry->d_inode;
	struct fat_slot_info sinfo;
	int err;

	lock_kernel();
	err = msdos_find(dir, dentry->d_name.name, dentry->d_name.len, &sinfo);
	if (err)
		goto out;

	err = fat_remove_entries(dir, &sinfo);	/* and releases bh */
	if (err)
		goto out;
	clear_nlink(inode);
	inode->i_ctime = CURRENT_TIME_SEC;
	fat_detach(inode);
out:
	unlock_kernel();
	if (!err)
		err = fat_flush_inodes(inode->i_sb, dir, inode);

	return err;
}
コード例 #13
0
static int fuse_unlink(struct inode *dir, struct dentry *entry)
{
	int err;
	struct fuse_conn *fc = get_fuse_conn(dir);
	struct fuse_req *req;

	FUSE_MIGHT_FREEZE(dir->i_sb, "fuse_unlink");

	req = fuse_get_req(fc);
	if (IS_ERR(req))
		return PTR_ERR(req);

	req->in.h.opcode = FUSE_UNLINK;
	req->in.h.nodeid = get_node_id(dir);
	req->in.numargs = 1;
	req->in.args[0].size = entry->d_name.len + 1;
	req->in.args[0].value = entry->d_name.name;
	fuse_request_send(fc, req);
	err = req->out.h.error;
	fuse_put_request(fc, req);
	if (!err) {
		struct inode *inode = entry->d_inode;

		/*
		 * Set nlink to zero so the inode can be cleared, if the inode
		 * does have more links this will be discovered at the next
		 * lookup/getattr.
		 */
		clear_nlink(inode);
		fuse_invalidate_attr(inode);
		fuse_invalidate_attr(dir);
		fuse_invalidate_entry_cache(entry);
	} else if (err == -EINTR)
		fuse_invalidate_entry(entry);
	return err;
}
コード例 #14
0
static int fuse_rmdir(struct inode *dir, struct dentry *entry)
{
	int err;
	struct fuse_conn *fc = get_fuse_conn(dir);
	struct fuse_req *req = fuse_get_req_nopages(fc);
	if (IS_ERR(req))
		return PTR_ERR(req);

	req->in.h.opcode = FUSE_RMDIR;
	req->in.h.nodeid = get_node_id(dir);
	req->in.numargs = 1;
	req->in.args[0].size = entry->d_name.len + 1;
	req->in.args[0].value = entry->d_name.name;
	fuse_request_send(fc, req);
	err = req->out.h.error;
	fuse_put_request(fc, req);
	if (!err) {
		clear_nlink(entry->d_inode);
		fuse_invalidate_attr(dir);
		fuse_invalidate_entry_cache(entry);
	} else if (err == -EINTR)
		fuse_invalidate_entry(entry);
	return err;
}
コード例 #15
0
ファイル: dir.c プロジェクト: patrick-ken/R7000
static int hfsplus_rmdir(struct inode *dir, struct dentry *dentry)
{
	struct inode *inode;
	hfsplus_handle_t hfsplus_handle;
	int res;

	inode = dentry->d_inode;
	if (inode->i_size != 2)
		return -ENOTEMPTY;
	if ((res = hfsplus_journal_start(__FUNCTION__, dir->i_sb, &hfsplus_handle)))
		return res;

	res = hfsplus_delete_cat(&hfsplus_handle, inode->i_ino, dir, &dentry->d_name);
	if (res) {
		hfsplus_journal_stop(&hfsplus_handle);
		return res;
	}
	clear_nlink(inode);
	inode->i_ctime = CURRENT_TIME_SEC;
	hfsplus_delete_inode(&hfsplus_handle, inode);
	res = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode);
	hfsplus_journal_stop(&hfsplus_handle);
	return res;
}
コード例 #16
0
ファイル: namei.c プロジェクト: Dreamz2014/tux3-fuse
static int __tux3_mknod(struct inode *dir, struct dentry *dentry,
			struct tux_iattr *iattr, dev_t rdev)
{
	if(DEBUG_MODE_K==1)
	{
		printf("\t\t\t\t%25s[K]  %25s  %4d  #in\n",__FILE__,__func__,__LINE__);
	}
	struct inode *inode;
	int err, is_dir = S_ISDIR(iattr->mode);

	if (!huge_valid_dev(rdev))
		return -EINVAL;

	if (is_dir && dir->i_nlink >= TUX_LINK_MAX)
		return -EMLINK;

	change_begin(tux_sb(dir->i_sb));
	inode = tux_create_inode(dir, iattr, rdev);
	err = PTR_ERR(inode);
	if (!IS_ERR(inode)) {
		err = tux_add_dirent(dir, dentry, inode);
		if (!err) {
			unlock_new_inode(inode);
			if (is_dir)
				inode_inc_link_count(dir);
			goto out;
		}
		clear_nlink(inode);
		tux3_mark_inode_dirty(inode);
		unlock_new_inode(inode);
		iput(inode);
	}
out:
	change_end(tux_sb(dir->i_sb));
	return err;
}
コード例 #17
0
ファイル: zfs_dir.c プロジェクト: ColinIanKing/zfs
void
zfs_rmnode(znode_t *zp)
{
	zfsvfs_t	*zfsvfs = ZTOZSB(zp);
	objset_t	*os = zfsvfs->z_os;
	znode_t		*xzp = NULL;
	dmu_tx_t	*tx;
	uint64_t	acl_obj;
	uint64_t	xattr_obj;
	uint64_t	links;
	int		error;

	ASSERT(ZTOI(zp)->i_nlink == 0);
	ASSERT(atomic_read(&ZTOI(zp)->i_count) == 0);

	/*
	 * If this is an attribute directory, purge its contents.
	 */
	if (S_ISDIR(ZTOI(zp)->i_mode) && (zp->z_pflags & ZFS_XATTR)) {
		if (zfs_purgedir(zp) != 0) {
			/*
			 * Not enough space to delete some xattrs.
			 * Leave it in the unlinked set.
			 */
			zfs_znode_dmu_fini(zp);

			return;
		}
	}

	/*
	 * Free up all the data in the file.  We don't do this for directories
	 * because we need truncate and remove to be in the same tx, like in
	 * zfs_znode_delete(). Otherwise, if we crash here we'll end up with
	 * an inconsistent truncated zap object in the delete queue.  Note a
	 * truncated file is harmless since it only contains user data.
	 */
	if (S_ISREG(ZTOI(zp)->i_mode)) {
		error = dmu_free_long_range(os, zp->z_id, 0, DMU_OBJECT_END);
		if (error) {
			/*
			 * Not enough space or we were interrupted by unmount.
			 * Leave the file in the unlinked set.
			 */
			zfs_znode_dmu_fini(zp);
			return;
		}
	}

	/*
	 * If the file has extended attributes, we're going to unlink
	 * the xattr dir.
	 */
	error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
	    &xattr_obj, sizeof (xattr_obj));
	if (error == 0 && xattr_obj) {
		error = zfs_zget(zfsvfs, xattr_obj, &xzp);
		ASSERT(error == 0);
	}

	acl_obj = zfs_external_acl(zp);

	/*
	 * Set up the final transaction.
	 */
	tx = dmu_tx_create(os);
	dmu_tx_hold_free(tx, zp->z_id, 0, DMU_OBJECT_END);
	dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
	if (xzp) {
		dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, TRUE, NULL);
		dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
	}
	if (acl_obj)
		dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END);

	zfs_sa_upgrade_txholds(tx, zp);
	error = dmu_tx_assign(tx, TXG_WAIT);
	if (error) {
		/*
		 * Not enough space to delete the file.  Leave it in the
		 * unlinked set, leaking it until the fs is remounted (at
		 * which point we'll call zfs_unlinked_drain() to process it).
		 */
		dmu_tx_abort(tx);
		zfs_znode_dmu_fini(zp);
		goto out;
	}

	if (xzp) {
		ASSERT(error == 0);
		mutex_enter(&xzp->z_lock);
		xzp->z_unlinked = B_TRUE;	/* mark xzp for deletion */
		clear_nlink(ZTOI(xzp));		/* no more links to it */
		links = 0;
		VERIFY(0 == sa_update(xzp->z_sa_hdl, SA_ZPL_LINKS(zfsvfs),
		    &links, sizeof (links), tx));
		mutex_exit(&xzp->z_lock);
		zfs_unlinked_add(xzp, tx);
	}

	/* Remove this znode from the unlinked set */
	VERIFY3U(0, ==,
	    zap_remove_int(zfsvfs->z_os, zfsvfs->z_unlinkedobj, zp->z_id, tx));

	zfs_znode_delete(zp, tx);

	dmu_tx_commit(tx);
out:
	if (xzp)
		zfs_iput_async(ZTOI(xzp));
}
コード例 #18
0
ファイル: dir.c プロジェクト: DenisLug/mptcp
static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
		      struct dentry *dentry)
{
	struct ubifs_info *c = dir->i_sb->s_fs_info;
	struct inode *inode = d_inode(old_dentry);
	struct ubifs_inode *ui = ubifs_inode(inode);
	struct ubifs_inode *dir_ui = ubifs_inode(dir);
	int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
	struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
				.dirtied_ino_d = ALIGN(ui->data_len, 8) };

	/*
	 * Budget request settings: new direntry, changing the target inode,
	 * changing the parent inode.
	 */

	dbg_gen("dent '%pd' to ino %lu (nlink %d) in dir ino %lu",
		dentry, inode->i_ino,
		inode->i_nlink, dir->i_ino);
	ubifs_assert(mutex_is_locked(&dir->i_mutex));
	ubifs_assert(mutex_is_locked(&inode->i_mutex));

	err = dbg_check_synced_i_size(c, inode);
	if (err)
		return err;

	err = ubifs_budget_space(c, &req);
	if (err)
		return err;

	lock_2_inodes(dir, inode);
	inc_nlink(inode);
	ihold(inode);
	inode->i_ctime = ubifs_current_time(inode);
	dir->i_size += sz_change;
	dir_ui->ui_size = dir->i_size;
	dir->i_mtime = dir->i_ctime = inode->i_ctime;
	err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
	if (err)
		goto out_cancel;
	unlock_2_inodes(dir, inode);

	ubifs_release_budget(c, &req);
	d_instantiate(dentry, inode);
	return 0;

out_cancel:
	dir->i_size -= sz_change;
	dir_ui->ui_size = dir->i_size;
	drop_nlink(inode);
	unlock_2_inodes(dir, inode);
	ubifs_release_budget(c, &req);
	iput(inode);
	return err;
}

static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
{
	struct ubifs_info *c = dir->i_sb->s_fs_info;
	struct inode *inode = d_inode(dentry);
	struct ubifs_inode *dir_ui = ubifs_inode(dir);
	int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
	int err, budgeted = 1;
	struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
	unsigned int saved_nlink = inode->i_nlink;

	/*
	 * Budget request settings: deletion direntry, deletion inode (+1 for
	 * @dirtied_ino), changing the parent directory inode. If budgeting
	 * fails, go ahead anyway because we have extra space reserved for
	 * deletions.
	 */

	dbg_gen("dent '%pd' from ino %lu (nlink %d) in dir ino %lu",
		dentry, inode->i_ino,
		inode->i_nlink, dir->i_ino);
	ubifs_assert(mutex_is_locked(&dir->i_mutex));
	ubifs_assert(mutex_is_locked(&inode->i_mutex));
	err = dbg_check_synced_i_size(c, inode);
	if (err)
		return err;

	err = ubifs_budget_space(c, &req);
	if (err) {
		if (err != -ENOSPC)
			return err;
		budgeted = 0;
	}

	lock_2_inodes(dir, inode);
	inode->i_ctime = ubifs_current_time(dir);
	drop_nlink(inode);
	dir->i_size -= sz_change;
	dir_ui->ui_size = dir->i_size;
	dir->i_mtime = dir->i_ctime = inode->i_ctime;
	err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0);
	if (err)
		goto out_cancel;
	unlock_2_inodes(dir, inode);

	if (budgeted)
		ubifs_release_budget(c, &req);
	else {
		/* We've deleted something - clean the "no space" flags */
		c->bi.nospace = c->bi.nospace_rp = 0;
		smp_wmb();
	}
	return 0;

out_cancel:
	dir->i_size += sz_change;
	dir_ui->ui_size = dir->i_size;
	set_nlink(inode, saved_nlink);
	unlock_2_inodes(dir, inode);
	if (budgeted)
		ubifs_release_budget(c, &req);
	return err;
}

/**
 * check_dir_empty - check if a directory is empty or not.
 * @c: UBIFS file-system description object
 * @dir: VFS inode object of the directory to check
 *
 * This function checks if directory @dir is empty. Returns zero if the
 * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
 * in case of of errors.
 */
static int check_dir_empty(struct ubifs_info *c, struct inode *dir)
{
	struct qstr nm = { .name = NULL };
	struct ubifs_dent_node *dent;
	union ubifs_key key;
	int err;

	lowest_dent_key(c, &key, dir->i_ino);
	dent = ubifs_tnc_next_ent(c, &key, &nm);
	if (IS_ERR(dent)) {
		err = PTR_ERR(dent);
		if (err == -ENOENT)
			err = 0;
	} else {
		kfree(dent);
		err = -ENOTEMPTY;
	}
	return err;
}

static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
{
	struct ubifs_info *c = dir->i_sb->s_fs_info;
	struct inode *inode = d_inode(dentry);
	int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
	int err, budgeted = 1;
	struct ubifs_inode *dir_ui = ubifs_inode(dir);
	struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };

	/*
	 * Budget request settings: deletion direntry, deletion inode and
	 * changing the parent inode. If budgeting fails, go ahead anyway
	 * because we have extra space reserved for deletions.
	 */

	dbg_gen("directory '%pd', ino %lu in dir ino %lu", dentry,
		inode->i_ino, dir->i_ino);
	ubifs_assert(mutex_is_locked(&dir->i_mutex));
	ubifs_assert(mutex_is_locked(&inode->i_mutex));
	err = check_dir_empty(c, d_inode(dentry));
	if (err)
		return err;

	err = ubifs_budget_space(c, &req);
	if (err) {
		if (err != -ENOSPC)
			return err;
		budgeted = 0;
	}

	lock_2_inodes(dir, inode);
	inode->i_ctime = ubifs_current_time(dir);
	clear_nlink(inode);
	drop_nlink(dir);
	dir->i_size -= sz_change;
	dir_ui->ui_size = dir->i_size;
	dir->i_mtime = dir->i_ctime = inode->i_ctime;
	err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0);
	if (err)
		goto out_cancel;
	unlock_2_inodes(dir, inode);

	if (budgeted)
		ubifs_release_budget(c, &req);
	else {
		/* We've deleted something - clean the "no space" flags */
		c->bi.nospace = c->bi.nospace_rp = 0;
		smp_wmb();
	}
	return 0;

out_cancel:
	dir->i_size += sz_change;
	dir_ui->ui_size = dir->i_size;
	inc_nlink(dir);
	set_nlink(inode, 2);
	unlock_2_inodes(dir, inode);
	if (budgeted)
		ubifs_release_budget(c, &req);
	return err;
}

static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
	struct inode *inode;
	struct ubifs_inode *dir_ui = ubifs_inode(dir);
	struct ubifs_info *c = dir->i_sb->s_fs_info;
	int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
	struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };

	/*
	 * Budget request settings: new inode, new direntry and changing parent
	 * directory inode.
	 */

	dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
		dentry, mode, dir->i_ino);

	err = ubifs_budget_space(c, &req);
	if (err)
		return err;

	inode = ubifs_new_inode(c, dir, S_IFDIR | mode);
	if (IS_ERR(inode)) {
		err = PTR_ERR(inode);
		goto out_budg;
	}

	err = ubifs_init_security(dir, inode, &dentry->d_name);
	if (err)
		goto out_inode;

	mutex_lock(&dir_ui->ui_mutex);
	insert_inode_hash(inode);
	inc_nlink(inode);
	inc_nlink(dir);
	dir->i_size += sz_change;
	dir_ui->ui_size = dir->i_size;
	dir->i_mtime = dir->i_ctime = inode->i_ctime;
	err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
	if (err) {
		ubifs_err(c, "cannot create directory, error %d", err);
		goto out_cancel;
	}
	mutex_unlock(&dir_ui->ui_mutex);

	ubifs_release_budget(c, &req);
	d_instantiate(dentry, inode);
	return 0;

out_cancel:
	dir->i_size -= sz_change;
	dir_ui->ui_size = dir->i_size;
	drop_nlink(dir);
	mutex_unlock(&dir_ui->ui_mutex);
out_inode:
	make_bad_inode(inode);
	iput(inode);
out_budg:
	ubifs_release_budget(c, &req);
	return err;
}

static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
		       umode_t mode, dev_t rdev)
{
	struct inode *inode;
	struct ubifs_inode *ui;
	struct ubifs_inode *dir_ui = ubifs_inode(dir);
	struct ubifs_info *c = dir->i_sb->s_fs_info;
	union ubifs_dev_desc *dev = NULL;
	int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
	int err, devlen = 0;
	struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
					.new_ino_d = ALIGN(devlen, 8),
					.dirtied_ino = 1 };

	/*
	 * Budget request settings: new inode, new direntry and changing parent
	 * directory inode.
	 */

	dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);

	if (!new_valid_dev(rdev))
		return -EINVAL;

	if (S_ISBLK(mode) || S_ISCHR(mode)) {
		dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
		if (!dev)
			return -ENOMEM;
		devlen = ubifs_encode_dev(dev, rdev);
	}

	err = ubifs_budget_space(c, &req);
	if (err) {
		kfree(dev);
		return err;
	}

	inode = ubifs_new_inode(c, dir, mode);
	if (IS_ERR(inode)) {
		kfree(dev);
		err = PTR_ERR(inode);
		goto out_budg;
	}

	init_special_inode(inode, inode->i_mode, rdev);
	inode->i_size = ubifs_inode(inode)->ui_size = devlen;
	ui = ubifs_inode(inode);
	ui->data = dev;
	ui->data_len = devlen;

	err = ubifs_init_security(dir, inode, &dentry->d_name);
	if (err)
		goto out_inode;

	mutex_lock(&dir_ui->ui_mutex);
	dir->i_size += sz_change;
	dir_ui->ui_size = dir->i_size;
	dir->i_mtime = dir->i_ctime = inode->i_ctime;
	err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
	if (err)
		goto out_cancel;
	mutex_unlock(&dir_ui->ui_mutex);

	ubifs_release_budget(c, &req);
	insert_inode_hash(inode);
	d_instantiate(dentry, inode);
	return 0;

out_cancel:
	dir->i_size -= sz_change;
	dir_ui->ui_size = dir->i_size;
	mutex_unlock(&dir_ui->ui_mutex);
out_inode:
	make_bad_inode(inode);
	iput(inode);
out_budg:
	ubifs_release_budget(c, &req);
	return err;
}

static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
			 const char *symname)
{
	struct inode *inode;
	struct ubifs_inode *ui;
	struct ubifs_inode *dir_ui = ubifs_inode(dir);
	struct ubifs_info *c = dir->i_sb->s_fs_info;
	int err, len = strlen(symname);
	int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
	struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
					.new_ino_d = ALIGN(len, 8),
					.dirtied_ino = 1 };

	/*
	 * Budget request settings: new inode, new direntry and changing parent
	 * directory inode.
	 */

	dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry,
		symname, dir->i_ino);

	if (len > UBIFS_MAX_INO_DATA)
		return -ENAMETOOLONG;

	err = ubifs_budget_space(c, &req);
	if (err)
		return err;

	inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
	if (IS_ERR(inode)) {
		err = PTR_ERR(inode);
		goto out_budg;
	}

	ui = ubifs_inode(inode);
	ui->data = kmalloc(len + 1, GFP_NOFS);
	if (!ui->data) {
		err = -ENOMEM;
		goto out_inode;
	}

	memcpy(ui->data, symname, len);
	((char *)ui->data)[len] = '\0';
	inode->i_link = ui->data;
	/*
	 * The terminating zero byte is not written to the flash media and it
	 * is put just to make later in-memory string processing simpler. Thus,
	 * data length is @len, not @len + %1.
	 */
	ui->data_len = len;
	inode->i_size = ubifs_inode(inode)->ui_size = len;

	err = ubifs_init_security(dir, inode, &dentry->d_name);
	if (err)
		goto out_inode;

	mutex_lock(&dir_ui->ui_mutex);
	dir->i_size += sz_change;
	dir_ui->ui_size = dir->i_size;
	dir->i_mtime = dir->i_ctime = inode->i_ctime;
	err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
	if (err)
		goto out_cancel;
	mutex_unlock(&dir_ui->ui_mutex);

	ubifs_release_budget(c, &req);
	insert_inode_hash(inode);
	d_instantiate(dentry, inode);
	return 0;

out_cancel:
	dir->i_size -= sz_change;
	dir_ui->ui_size = dir->i_size;
	mutex_unlock(&dir_ui->ui_mutex);
out_inode:
	make_bad_inode(inode);
	iput(inode);
out_budg:
	ubifs_release_budget(c, &req);
	return err;
}

/**
 * lock_3_inodes - a wrapper for locking three UBIFS inodes.
 * @inode1: first inode
 * @inode2: second inode
 * @inode3: third inode
 *
 * This function is used for 'ubifs_rename()' and @inode1 may be the same as
 * @inode2 whereas @inode3 may be %NULL.
 *
 * We do not implement any tricks to guarantee strict lock ordering, because
 * VFS has already done it for us on the @i_mutex. So this is just a simple
 * wrapper function.
 */
static void lock_3_inodes(struct inode *inode1, struct inode *inode2,
			  struct inode *inode3)
{
	mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
	if (inode2 != inode1)
		mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
	if (inode3)
		mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
}

/**
 * unlock_3_inodes - a wrapper for unlocking three UBIFS inodes for rename.
 * @inode1: first inode
 * @inode2: second inode
 * @inode3: third inode
 */
static void unlock_3_inodes(struct inode *inode1, struct inode *inode2,
			    struct inode *inode3)
{
	if (inode3)
		mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
	if (inode1 != inode2)
		mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
	mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
}

static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
			struct inode *new_dir, struct dentry *new_dentry)
{
	struct ubifs_info *c = old_dir->i_sb->s_fs_info;
	struct inode *old_inode = d_inode(old_dentry);
	struct inode *new_inode = d_inode(new_dentry);
	struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
	int err, release, sync = 0, move = (new_dir != old_dir);
	int is_dir = S_ISDIR(old_inode->i_mode);
	int unlink = !!new_inode;
	int new_sz = CALC_DENT_SIZE(new_dentry->d_name.len);
	int old_sz = CALC_DENT_SIZE(old_dentry->d_name.len);
	struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
					.dirtied_ino = 3 };
	struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
			.dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
	struct timespec time;
	unsigned int uninitialized_var(saved_nlink);

	/*
	 * Budget request settings: deletion direntry, new direntry, removing
	 * the old inode, and changing old and new parent directory inodes.
	 *
	 * However, this operation also marks the target inode as dirty and
	 * does not write it, so we allocate budget for the target inode
	 * separately.
	 */

	dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu",
		old_dentry, old_inode->i_ino, old_dir->i_ino,
		new_dentry, new_dir->i_ino);
	ubifs_assert(mutex_is_locked(&old_dir->i_mutex));
	ubifs_assert(mutex_is_locked(&new_dir->i_mutex));
	if (unlink)
		ubifs_assert(mutex_is_locked(&new_inode->i_mutex));


	if (unlink && is_dir) {
		err = check_dir_empty(c, new_inode);
		if (err)
			return err;
	}

	err = ubifs_budget_space(c, &req);
	if (err)
		return err;
	err = ubifs_budget_space(c, &ino_req);
	if (err) {
		ubifs_release_budget(c, &req);
		return err;
	}

	lock_3_inodes(old_dir, new_dir, new_inode);

	/*
	 * Like most other Unix systems, set the @i_ctime for inodes on a
	 * rename.
	 */
	time = ubifs_current_time(old_dir);
	old_inode->i_ctime = time;

	/* We must adjust parent link count when renaming directories */
	if (is_dir) {
		if (move) {
			/*
			 * @old_dir loses a link because we are moving
			 * @old_inode to a different directory.
			 */
			drop_nlink(old_dir);
			/*
			 * @new_dir only gains a link if we are not also
			 * overwriting an existing directory.
			 */
			if (!unlink)
				inc_nlink(new_dir);
		} else {
			/*
			 * @old_inode is not moving to a different directory,
			 * but @old_dir still loses a link if we are
			 * overwriting an existing directory.
			 */
			if (unlink)
				drop_nlink(old_dir);
		}
	}

	old_dir->i_size -= old_sz;
	ubifs_inode(old_dir)->ui_size = old_dir->i_size;
	old_dir->i_mtime = old_dir->i_ctime = time;
	new_dir->i_mtime = new_dir->i_ctime = time;

	/*
	 * And finally, if we unlinked a direntry which happened to have the
	 * same name as the moved direntry, we have to decrement @i_nlink of
	 * the unlinked inode and change its ctime.
	 */
	if (unlink) {
		/*
		 * Directories cannot have hard-links, so if this is a
		 * directory, just clear @i_nlink.
		 */
		saved_nlink = new_inode->i_nlink;
		if (is_dir)
			clear_nlink(new_inode);
		else
			drop_nlink(new_inode);
		new_inode->i_ctime = time;
	} else {
		new_dir->i_size += new_sz;
		ubifs_inode(new_dir)->ui_size = new_dir->i_size;
	}

	/*
	 * Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
	 * is dirty, because this will be done later on at the end of
	 * 'ubifs_rename()'.
	 */
	if (IS_SYNC(old_inode)) {
		sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
		if (unlink && IS_SYNC(new_inode))
			sync = 1;
	}
	err = ubifs_jnl_rename(c, old_dir, old_dentry, new_dir, new_dentry,
			       sync);
	if (err)
		goto out_cancel;

	unlock_3_inodes(old_dir, new_dir, new_inode);
	ubifs_release_budget(c, &req);

	mutex_lock(&old_inode_ui->ui_mutex);
	release = old_inode_ui->dirty;
	mark_inode_dirty_sync(old_inode);
	mutex_unlock(&old_inode_ui->ui_mutex);

	if (release)
		ubifs_release_budget(c, &ino_req);
	if (IS_SYNC(old_inode))
		err = old_inode->i_sb->s_op->write_inode(old_inode, NULL);
	return err;

out_cancel:
	if (unlink) {
		set_nlink(new_inode, saved_nlink);
	} else {
		new_dir->i_size -= new_sz;
		ubifs_inode(new_dir)->ui_size = new_dir->i_size;
	}
	old_dir->i_size += old_sz;
	ubifs_inode(old_dir)->ui_size = old_dir->i_size;
	if (is_dir) {
		if (move) {
			inc_nlink(old_dir);
			if (!unlink)
				drop_nlink(new_dir);
		} else {
			if (unlink)
				inc_nlink(old_dir);
		}
	}
	unlock_3_inodes(old_dir, new_dir, new_inode);
	ubifs_release_budget(c, &ino_req);
	ubifs_release_budget(c, &req);
	return err;
}

int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
		  struct kstat *stat)
{
	loff_t size;
	struct inode *inode = d_inode(dentry);
	struct ubifs_inode *ui = ubifs_inode(inode);

	mutex_lock(&ui->ui_mutex);
	generic_fillattr(inode, stat);
	stat->blksize = UBIFS_BLOCK_SIZE;
	stat->size = ui->ui_size;

	/*
	 * Unfortunately, the 'stat()' system call was designed for block
	 * device based file systems, and it is not appropriate for UBIFS,
	 * because UBIFS does not have notion of "block". For example, it is
	 * difficult to tell how many block a directory takes - it actually
	 * takes less than 300 bytes, but we have to round it to block size,
	 * which introduces large mistake. This makes utilities like 'du' to
	 * report completely senseless numbers. This is the reason why UBIFS
	 * goes the same way as JFFS2 - it reports zero blocks for everything
	 * but regular files, which makes more sense than reporting completely
	 * wrong sizes.
	 */
	if (S_ISREG(inode->i_mode)) {
		size = ui->xattr_size;
		size += stat->size;
		size = ALIGN(size, UBIFS_BLOCK_SIZE);
		/*
		 * Note, user-space expects 512-byte blocks count irrespectively
		 * of what was reported in @stat->size.
		 */
		stat->blocks = size >> 9;
	} else
		stat->blocks = 0;
	mutex_unlock(&ui->ui_mutex);
	return 0;
}

const struct inode_operations ubifs_dir_inode_operations = {
	.lookup      = ubifs_lookup,
	.create      = ubifs_create,
	.link        = ubifs_link,
	.symlink     = ubifs_symlink,
	.unlink      = ubifs_unlink,
	.mkdir       = ubifs_mkdir,
	.rmdir       = ubifs_rmdir,
	.mknod       = ubifs_mknod,
	.rename      = ubifs_rename,
	.setattr     = ubifs_setattr,
	.getattr     = ubifs_getattr,
	.setxattr    = ubifs_setxattr,
	.getxattr    = ubifs_getxattr,
	.listxattr   = ubifs_listxattr,
	.removexattr = ubifs_removexattr,
};

const struct file_operations ubifs_dir_operations = {
	.llseek         = generic_file_llseek,
	.release        = ubifs_dir_release,
	.read           = generic_read_dir,
	.iterate        = ubifs_readdir,
	.fsync          = ubifs_fsync,
	.unlocked_ioctl = ubifs_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl   = ubifs_compat_ioctl,
#endif
};
コード例 #19
0
static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
		       struct gfs2_inode *ip, struct gfs2_diradd *da)
{
	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
	struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
	int error;

	if (da->nr_blocks) {
		error = gfs2_quota_lock_check(dip);
		if (error)
			goto fail_quota_locks;

		error = gfs2_inplace_reserve(dip, &ap);
		if (error)
			goto fail_quota_locks;

		error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
		if (error)
			goto fail_ipreserv;
	} else {
		error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
		if (error)
			goto fail_quota_locks;
	}

	error = gfs2_dir_add(&dip->i_inode, name, ip, da);
	if (error)
		goto fail_end_trans;

fail_end_trans:
	gfs2_trans_end(sdp);
fail_ipreserv:
	gfs2_inplace_release(dip);
fail_quota_locks:
	gfs2_quota_unlock(dip);
	return error;
}

static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
		    void *fs_info)
{
	const struct xattr *xattr;
	int err = 0;

	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
		err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
				       xattr->value_len, 0,
				       GFS2_EATYPE_SECURITY);
		if (err < 0)
			break;
	}
	return err;
}

static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip,
			      const struct qstr *qstr)
{
	return security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr,
					    &gfs2_initxattrs, NULL);
}

/**
 * gfs2_create_inode - Create a new inode
 * @dir: The parent directory
 * @dentry: The new dentry
 * @file: If non-NULL, the file which is being opened
 * @mode: The permissions on the new inode
 * @dev: For device nodes, this is the device number
 * @symname: For symlinks, this is the link destination
 * @size: The initial size of the inode (ignored for directories)
 *
 * Returns: 0 on success, or error code
 */

static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
			     struct file *file,
			     umode_t mode, dev_t dev, const char *symname,
			     unsigned int size, int excl, int *opened)
{
	const struct qstr *name = &dentry->d_name;
	struct posix_acl *default_acl, *acl;
	struct gfs2_holder ghs[2];
	struct inode *inode = NULL;
	struct gfs2_inode *dip = GFS2_I(dir), *ip;
	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
	struct gfs2_glock *io_gl;
	struct dentry *d;
	int error;
	u32 aflags = 0;
	struct gfs2_diradd da = { .bh = NULL, };

	if (!name->len || name->len > GFS2_FNAMESIZE)
		return -ENAMETOOLONG;

	error = gfs2_rs_alloc(dip);
	if (error)
		return error;

	error = gfs2_rindex_update(sdp);
	if (error)
		return error;

	error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
	if (error)
		goto fail;

	error = create_ok(dip, name, mode);
	if (error)
		goto fail_gunlock;

	inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
	error = PTR_ERR(inode);
	if (!IS_ERR(inode)) {
		d = d_splice_alias(inode, dentry);
		error = PTR_ERR(d);
		if (IS_ERR(d)) {
			inode = ERR_CAST(d);
			goto fail_gunlock;
		}
		error = 0;
		if (file) {
			if (S_ISREG(inode->i_mode)) {
				WARN_ON(d != NULL);
				error = finish_open(file, dentry, gfs2_open_common, opened);
			} else {
				error = finish_no_open(file, d);
			}
		} else {
			dput(d);
		}
		gfs2_glock_dq_uninit(ghs);
		return error;
	} else if (error != -ENOENT) {
		goto fail_gunlock;
	}

	error = gfs2_diradd_alloc_required(dir, name, &da);
	if (error < 0)
		goto fail_gunlock;

	inode = new_inode(sdp->sd_vfs);
	error = -ENOMEM;
	if (!inode)
		goto fail_gunlock;

	error = posix_acl_create(dir, &mode, &default_acl, &acl);
	if (error)
		goto fail_free_vfs_inode;

	ip = GFS2_I(inode);
	error = gfs2_rs_alloc(ip);
	if (error)
		goto fail_free_acls;

	inode->i_mode = mode;
	set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
	inode->i_rdev = dev;
	inode->i_size = size;
	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
	gfs2_set_inode_blocks(inode, 1);
	munge_mode_uid_gid(dip, inode);
	ip->i_goal = dip->i_goal;
	ip->i_diskflags = 0;
	ip->i_eattr = 0;
	ip->i_height = 0;
	ip->i_depth = 0;
	ip->i_entries = 0;

	switch(mode & S_IFMT) {
	case S_IFREG:
		if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
		    gfs2_tune_get(sdp, gt_new_files_jdata))
			ip->i_diskflags |= GFS2_DIF_JDATA;
		gfs2_set_aops(inode);
		break;
	case S_IFDIR:
		ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
		ip->i_diskflags |= GFS2_DIF_JDATA;
		ip->i_entries = 2;
		break;
	}
	gfs2_set_inode_flags(inode);

	if ((GFS2_I(sdp->sd_root_dir->d_inode) == dip) ||
	    (dip->i_diskflags & GFS2_DIF_TOPDIR))
		aflags |= GFS2_AF_ORLOV;

	error = alloc_dinode(ip, aflags);
	if (error)
		goto fail_free_inode;

	error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
	if (error)
		goto fail_free_inode;

	ip->i_gl->gl_object = ip;
	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
	if (error)
		goto fail_free_inode;

	error = gfs2_trans_begin(sdp, RES_DINODE, 0);
	if (error)
		goto fail_gunlock2;

	init_dinode(dip, ip, symname);
	gfs2_trans_end(sdp);

	error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
	if (error)
		goto fail_gunlock2;

	error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
	if (error)
		goto fail_gunlock2;

	ip->i_iopen_gh.gh_gl->gl_object = ip;
	gfs2_glock_put(io_gl);
	gfs2_set_iop(inode);
	insert_inode_hash(inode);

	if (default_acl) {
		error = gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
		posix_acl_release(default_acl);
	}
	if (acl) {
		if (!error)
			error = gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
		posix_acl_release(acl);
	}

	if (error)
		goto fail_gunlock3;

	error = gfs2_security_init(dip, ip, name);
	if (error)
		goto fail_gunlock3;

	error = link_dinode(dip, name, ip, &da);
	if (error)
		goto fail_gunlock3;

	mark_inode_dirty(inode);
	d_instantiate(dentry, inode);
	if (file) {
		*opened |= FILE_CREATED;
		error = finish_open(file, dentry, gfs2_open_common, opened);
	}
	gfs2_glock_dq_uninit(ghs);
	gfs2_glock_dq_uninit(ghs + 1);
	return error;

fail_gunlock3:
	gfs2_glock_dq_uninit(ghs + 1);
	if (ip->i_gl)
		gfs2_glock_put(ip->i_gl);
	goto fail_gunlock;

fail_gunlock2:
	gfs2_glock_dq_uninit(ghs + 1);
fail_free_inode:
	if (ip->i_gl)
		gfs2_glock_put(ip->i_gl);
	gfs2_rs_delete(ip, NULL);
fail_free_acls:
	if (default_acl)
		posix_acl_release(default_acl);
	if (acl)
		posix_acl_release(acl);
fail_free_vfs_inode:
	free_inode_nonrcu(inode);
	inode = NULL;
fail_gunlock:
	gfs2_dir_no_add(&da);
	gfs2_glock_dq_uninit(ghs);
	if (inode && !IS_ERR(inode)) {
		clear_nlink(inode);
		mark_inode_dirty(inode);
		set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags);
		iput(inode);
	}
fail:
	return error;
}

/**
 * gfs2_create - Create a file
 * @dir: The directory in which to create the file
 * @dentry: The dentry of the new file
 * @mode: The mode of the new file
 *
 * Returns: errno
 */

static int gfs2_create(struct inode *dir, struct dentry *dentry,
		       umode_t mode, bool excl)
{
	return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL);
}

/**
 * __gfs2_lookup - Look up a filename in a directory and return its inode
 * @dir: The directory inode
 * @dentry: The dentry of the new inode
 * @file: File to be opened
 * @opened: atomic_open flags
 *
 *
 * Returns: errno
 */

static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
				    struct file *file, int *opened)
{
	struct inode *inode;
	struct dentry *d;
	struct gfs2_holder gh;
	struct gfs2_glock *gl;
	int error;

	inode = gfs2_lookupi(dir, &dentry->d_name, 0);
	if (!inode)
		return NULL;
	if (IS_ERR(inode))
		return ERR_CAST(inode);

	gl = GFS2_I(inode)->i_gl;
	error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
	if (error) {
		iput(inode);
		return ERR_PTR(error);
	}

	d = d_splice_alias(inode, dentry);
	if (IS_ERR(d)) {
		gfs2_glock_dq_uninit(&gh);
		return d;
	}
	if (file && S_ISREG(inode->i_mode))
		error = finish_open(file, dentry, gfs2_open_common, opened);

	gfs2_glock_dq_uninit(&gh);
	if (error) {
		dput(d);
		return ERR_PTR(error);
	}
	return d;
}

static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
				  unsigned flags)
{
	return __gfs2_lookup(dir, dentry, NULL, NULL);
}

/**
 * gfs2_link - Link to a file
 * @old_dentry: The inode to link
 * @dir: Add link to this directory
 * @dentry: The name of the link
 *
 * Link the inode in "old_dentry" into the directory "dir" with the
 * name in "dentry".
 *
 * Returns: errno
 */

static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
		     struct dentry *dentry)
{
	struct gfs2_inode *dip = GFS2_I(dir);
	struct gfs2_sbd *sdp = GFS2_SB(dir);
	struct inode *inode = old_dentry->d_inode;
	struct gfs2_inode *ip = GFS2_I(inode);
	struct gfs2_holder ghs[2];
	struct buffer_head *dibh;
	struct gfs2_diradd da = { .bh = NULL, };
	int error;

	if (S_ISDIR(inode->i_mode))
		return -EPERM;

	error = gfs2_rs_alloc(dip);
	if (error)
		return error;

	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);

	error = gfs2_glock_nq(ghs); /* parent */
	if (error)
		goto out_parent;

	error = gfs2_glock_nq(ghs + 1); /* child */
	if (error)
		goto out_child;

	error = -ENOENT;
	if (inode->i_nlink == 0)
		goto out_gunlock;

	error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
	if (error)
		goto out_gunlock;

	error = gfs2_dir_check(dir, &dentry->d_name, NULL);
	switch (error) {
	case -ENOENT:
		break;
	case 0:
		error = -EEXIST;
	default:
		goto out_gunlock;
	}

	error = -EINVAL;
	if (!dip->i_inode.i_nlink)
		goto out_gunlock;
	error = -EFBIG;
	if (dip->i_entries == (u32)-1)
		goto out_gunlock;
	error = -EPERM;
	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
		goto out_gunlock;
	error = -EINVAL;
	if (!ip->i_inode.i_nlink)
		goto out_gunlock;
	error = -EMLINK;
	if (ip->i_inode.i_nlink == (u32)-1)
		goto out_gunlock;

	error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
	if (error < 0)
		goto out_gunlock;

	if (da.nr_blocks) {
		struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
		error = gfs2_quota_lock_check(dip);
		if (error)
			goto out_gunlock;

		error = gfs2_inplace_reserve(dip, &ap);
		if (error)
			goto out_gunlock_q;

		error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
		if (error)
			goto out_ipres;
	} else {
		error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
		if (error)
			goto out_ipres;
	}

	error = gfs2_meta_inode_buffer(ip, &dibh);
	if (error)
		goto out_end_trans;

	error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
	if (error)
		goto out_brelse;

	gfs2_trans_add_meta(ip->i_gl, dibh);
	inc_nlink(&ip->i_inode);
	ip->i_inode.i_ctime = CURRENT_TIME;
	ihold(inode);
	d_instantiate(dentry, inode);
	mark_inode_dirty(inode);

out_brelse:
	brelse(dibh);
out_end_trans:
	gfs2_trans_end(sdp);
out_ipres:
	if (da.nr_blocks)
		gfs2_inplace_release(dip);
out_gunlock_q:
	if (da.nr_blocks)
		gfs2_quota_unlock(dip);
out_gunlock:
	gfs2_dir_no_add(&da);
	gfs2_glock_dq(ghs + 1);
out_child:
	gfs2_glock_dq(ghs);
out_parent:
	gfs2_holder_uninit(ghs);
	gfs2_holder_uninit(ghs + 1);
	return error;
}

/*
 * gfs2_unlink_ok - check to see that a inode is still in a directory
 * @dip: the directory
 * @name: the name of the file
 * @ip: the inode
 *
 * Assumes that the lock on (at least) @dip is held.
 *
 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
 */

static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
			  const struct gfs2_inode *ip)
{
	int error;

	if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
		return -EPERM;

	if ((dip->i_inode.i_mode & S_ISVTX) &&
	    !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
	    !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
		return -EPERM;

	if (IS_APPEND(&dip->i_inode))
		return -EPERM;

	error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
	if (error)
		return error;

	error = gfs2_dir_check(&dip->i_inode, name, ip);
	if (error)
		return error;

	return 0;
}
コード例 #20
0
ファイル: namei.c プロジェクト: Abioy/kasan
int
affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
	struct super_block	*sb = dir->i_sb;
	struct buffer_head	*bh;
	struct inode		*inode;
	char			*p;
	int			 i, maxlen, error;
	char			 c, lc;

	pr_debug("%s(%lu,\"%pd\" -> \"%s\")\n",
		 __func__, dir->i_ino, dentry, symname);

	maxlen = AFFS_SB(sb)->s_hashsize * sizeof(u32) - 1;
	inode  = affs_new_inode(dir);
	if (!inode)
		return -ENOSPC;

	inode->i_op = &affs_symlink_inode_operations;
	inode->i_data.a_ops = &affs_symlink_aops;
	inode->i_mode = S_IFLNK | 0777;
	mode_to_prot(inode);

	error = -EIO;
	bh = affs_bread(sb, inode->i_ino);
	if (!bh)
		goto err;
	i  = 0;
	p  = (char *)AFFS_HEAD(bh)->table;
	lc = '/';
	if (*symname == '/') {
		struct affs_sb_info *sbi = AFFS_SB(sb);
		while (*symname == '/')
			symname++;
		spin_lock(&sbi->symlink_lock);
		while (sbi->s_volume[i])	/* Cannot overflow */
			*p++ = sbi->s_volume[i++];
		spin_unlock(&sbi->symlink_lock);
	}
	while (i < maxlen && (c = *symname++)) {
		if (c == '.' && lc == '/' && *symname == '.' && symname[1] == '/') {
			*p++ = '/';
			i++;
			symname += 2;
			lc = '/';
		} else if (c == '.' && lc == '/' && *symname == '/') {
			symname++;
			lc = '/';
		} else {
			*p++ = c;
			lc   = c;
			i++;
		}
		if (lc == '/')
			while (*symname == '/')
				symname++;
	}
	*p = 0;
	mark_buffer_dirty_inode(bh, inode);
	affs_brelse(bh);
	mark_inode_dirty(inode);

	error = affs_add_entry(dir, inode, dentry, ST_SOFTLINK);
	if (error)
		goto err;

	return 0;

err:
	clear_nlink(inode);
	mark_inode_dirty(inode);
	iput(inode);
	return error;
}
コード例 #21
0
ファイル: namei.c プロジェクト: Berrrry/SPH-L710_NA_Kernel
/*
 * NAME:	jfs_rmdir(dip, dentry)
 *
 * FUNCTION:	remove a link to child directory
 *
 * PARAMETER:	dip	- parent inode
 *		dentry	- child directory dentry
 *
 * RETURN:	-EINVAL	- if name is . or ..
 *		-EINVAL - if . or .. exist but are invalid.
 *		errors from subroutines
 *
 * note:
 * if other threads have the directory open when the last link
 * is removed, the "." and ".." entries, if present, are removed before
 * rmdir() returns and no new entries may be created in the directory,
 * but the directory is not removed until the last reference to
 * the directory is released (cf.unlink() of regular file).
 */
static int jfs_rmdir(struct inode *dip, struct dentry *dentry)
{
    int rc;
    tid_t tid;		/* transaction id */
    struct inode *ip = dentry->d_inode;
    ino_t ino;
    struct component_name dname;
    struct inode *iplist[2];
    struct tblock *tblk;

    jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name);

    /* Init inode for quota operations. */
    dquot_initialize(dip);
    dquot_initialize(ip);

    /* directory must be empty to be removed */
    if (!dtEmpty(ip)) {
        rc = -ENOTEMPTY;
        goto out;
    }

    if ((rc = get_UCSname(&dname, dentry))) {
        goto out;
    }

    tid = txBegin(dip->i_sb, 0);

    mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT);
    mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);

    iplist[0] = dip;
    iplist[1] = ip;

    tblk = tid_to_tblock(tid);
    tblk->xflag |= COMMIT_DELETE;
    tblk->u.ip = ip;

    /*
     * delete the entry of target directory from parent directory
     */
    ino = ip->i_ino;
    if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
        jfs_err("jfs_rmdir: dtDelete returned %d", rc);
        if (rc == -EIO)
            txAbort(tid, 1);
        txEnd(tid);
        mutex_unlock(&JFS_IP(ip)->commit_mutex);
        mutex_unlock(&JFS_IP(dip)->commit_mutex);

        goto out2;
    }

    /* update parent directory's link count corresponding
     * to ".." entry of the target directory deleted
     */
    dip->i_ctime = dip->i_mtime = CURRENT_TIME;
    inode_dec_link_count(dip);

    /*
     * OS/2 could have created EA and/or ACL
     */
    /* free EA from both persistent and working map */
    if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
        /* free EA pages */
        txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
    }
    JFS_IP(ip)->ea.flag = 0;

    /* free ACL from both persistent and working map */
    if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
        /* free ACL pages */
        txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
    }
    JFS_IP(ip)->acl.flag = 0;

    /* mark the target directory as deleted */
    clear_nlink(ip);
    mark_inode_dirty(ip);

    rc = txCommit(tid, 2, &iplist[0], 0);

    txEnd(tid);

    mutex_unlock(&JFS_IP(ip)->commit_mutex);
    mutex_unlock(&JFS_IP(dip)->commit_mutex);

    /*
     * Truncating the directory index table is not guaranteed.  It
     * may need to be done iteratively
     */
    if (test_cflag(COMMIT_Stale, dip)) {
        if (dip->i_size > 1)
            jfs_truncate_nolock(dip, 0);

        clear_cflag(COMMIT_Stale, dip);
    }

out2:
    free_UCSname(&dname);

out:
    jfs_info("jfs_rmdir: rc:%d", rc);
    return rc;
}
コード例 #22
0
struct dentry *f2fs_get_parent(struct dentry *child)
{
    struct qstr dotdot = {.len = 2, .name = ".."};
    unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
    if (!ino)
        return ERR_PTR(-ENOENT);
    return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
}

static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
                                  struct nameidata *nd)
{
    struct inode *inode = NULL;
    struct f2fs_dir_entry *de;
    struct page *page;

    if (dentry->d_name.len > F2FS_NAME_LEN)
        return ERR_PTR(-ENAMETOOLONG);

    de = f2fs_find_entry(dir, &dentry->d_name, &page);
    if (de) {
        nid_t ino = le32_to_cpu(de->ino);
        kunmap(page);
        f2fs_put_page(page, 0);

        inode = f2fs_iget(dir->i_sb, ino);
        if (IS_ERR(inode))
            return ERR_CAST(inode);

        stat_inc_inline_inode(inode);
    }

    return d_splice_alias(inode, dentry);
}

static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
{
    struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
    struct inode *inode = dentry->d_inode;
    struct f2fs_dir_entry *de;
    struct page *page;
    int err = -ENOENT;

    trace_f2fs_unlink_enter(dir, dentry);
    f2fs_balance_fs(sbi);

    de = f2fs_find_entry(dir, &dentry->d_name, &page);
    if (!de)
        goto fail;

    f2fs_lock_op(sbi);
    err = acquire_orphan_inode(sbi);
    if (err) {
        f2fs_unlock_op(sbi);
        kunmap(page);
        f2fs_put_page(page, 0);
        goto fail;
    }
    f2fs_delete_entry(de, page, inode);
    f2fs_unlock_op(sbi);

    /* In order to evict this inode, we set it dirty */
    mark_inode_dirty(inode);
fail:
    trace_f2fs_unlink_exit(inode, err);
    return err;
}

static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
                        const char *symname)
{
    struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
    struct inode *inode;
    size_t symlen = strlen(symname) + 1;
    int err;

    f2fs_balance_fs(sbi);

    inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
    if (IS_ERR(inode))
        return PTR_ERR(inode);

    inode->i_op = &f2fs_symlink_inode_operations;
    inode->i_mapping->a_ops = &f2fs_dblock_aops;

    f2fs_lock_op(sbi);
    err = f2fs_add_link(dentry, inode);
    f2fs_unlock_op(sbi);
    if (err)
        goto out;

    err = page_symlink(inode, symname, symlen);
    alloc_nid_done(sbi, inode->i_ino);

    d_instantiate(dentry, inode);
    unlock_new_inode(inode);
    return err;
out:
    clear_nlink(inode);
    iget_failed(inode);
    alloc_nid_failed(sbi, inode->i_ino);
    return err;
}

static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
    struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
    struct inode *inode;
    int err;

    f2fs_balance_fs(sbi);

    inode = f2fs_new_inode(dir, S_IFDIR | mode);
    if (IS_ERR(inode))
        return PTR_ERR(inode);

    inode->i_op = &f2fs_dir_inode_operations;
    inode->i_fop = &f2fs_dir_operations;
    inode->i_mapping->a_ops = &f2fs_dblock_aops;
    mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);

    set_inode_flag(F2FS_I(inode), FI_INC_LINK);
    f2fs_lock_op(sbi);
    err = f2fs_add_link(dentry, inode);
    f2fs_unlock_op(sbi);
    if (err)
        goto out_fail;

    alloc_nid_done(sbi, inode->i_ino);

    d_instantiate(dentry, inode);
    unlock_new_inode(inode);

    return 0;

out_fail:
    clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
    clear_nlink(inode);
    iget_failed(inode);
    alloc_nid_failed(sbi, inode->i_ino);
    return err;
}

static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
{
    struct inode *inode = dentry->d_inode;
    if (f2fs_empty_dir(inode))
        return f2fs_unlink(dir, dentry);
    return -ENOTEMPTY;
}

static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
                      umode_t mode, dev_t rdev)
{
    struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
    struct inode *inode;
    int err = 0;

    if (!new_valid_dev(rdev))
        return -EINVAL;

    f2fs_balance_fs(sbi);

    inode = f2fs_new_inode(dir, mode);
    if (IS_ERR(inode))
        return PTR_ERR(inode);

    init_special_inode(inode, inode->i_mode, rdev);
    inode->i_op = &f2fs_special_inode_operations;

    f2fs_lock_op(sbi);
    err = f2fs_add_link(dentry, inode);
    f2fs_unlock_op(sbi);
    if (err)
        goto out;

    alloc_nid_done(sbi, inode->i_ino);
    d_instantiate(dentry, inode);
    unlock_new_inode(inode);
    return 0;
out:
    clear_nlink(inode);
    iget_failed(inode);
    alloc_nid_failed(sbi, inode->i_ino);
    return err;
}

static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
                       struct inode *new_dir, struct dentry *new_dentry)
{
    struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
    struct inode *old_inode = old_dentry->d_inode;
    struct inode *new_inode = new_dentry->d_inode;
    struct page *old_dir_page;
    struct page *old_page, *new_page;
    struct f2fs_dir_entry *old_dir_entry = NULL;
    struct f2fs_dir_entry *old_entry;
    struct f2fs_dir_entry *new_entry;
    int err = -ENOENT;

    f2fs_balance_fs(sbi);

    old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
    if (!old_entry)
        goto out;

    if (S_ISDIR(old_inode->i_mode)) {
        err = -EIO;
        old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
        if (!old_dir_entry)
            goto out_old;
    }

    if (new_inode) {

        err = -ENOTEMPTY;
        if (old_dir_entry && !f2fs_empty_dir(new_inode))
            goto out_dir;

        err = -ENOENT;
        new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
                                    &new_page);
        if (!new_entry)
            goto out_dir;

        f2fs_lock_op(sbi);

        err = acquire_orphan_inode(sbi);
        if (err)
            goto put_out_dir;

        if (update_dent_inode(old_inode, &new_dentry->d_name)) {
            release_orphan_inode(sbi);
            goto put_out_dir;
        }

        f2fs_set_link(new_dir, new_entry, new_page, old_inode);

        new_inode->i_ctime = CURRENT_TIME;
        down_write(&F2FS_I(new_inode)->i_sem);
        if (old_dir_entry)
            drop_nlink(new_inode);
        drop_nlink(new_inode);
        up_write(&F2FS_I(new_inode)->i_sem);

        mark_inode_dirty(new_inode);

        if (!new_inode->i_nlink)
            add_orphan_inode(sbi, new_inode->i_ino);
        else
            release_orphan_inode(sbi);

        update_inode_page(old_inode);
        update_inode_page(new_inode);
    } else {
        f2fs_lock_op(sbi);

        err = f2fs_add_link(new_dentry, old_inode);
        if (err) {
            f2fs_unlock_op(sbi);
            goto out_dir;
        }

        if (old_dir_entry) {
            inc_nlink(new_dir);
            update_inode_page(new_dir);
        }
    }

    down_write(&F2FS_I(old_inode)->i_sem);
    file_lost_pino(old_inode);
    up_write(&F2FS_I(old_inode)->i_sem);

    old_inode->i_ctime = CURRENT_TIME;
    mark_inode_dirty(old_inode);

    f2fs_delete_entry(old_entry, old_page, NULL);

    if (old_dir_entry) {
        if (old_dir != new_dir) {
            f2fs_set_link(old_inode, old_dir_entry,
                          old_dir_page, new_dir);
            update_inode_page(old_inode);
        } else {
            kunmap(old_dir_page);
            f2fs_put_page(old_dir_page, 0);
        }
        drop_nlink(old_dir);
        mark_inode_dirty(old_dir);
        update_inode_page(old_dir);
    }

    f2fs_unlock_op(sbi);
    return 0;

put_out_dir:
    f2fs_unlock_op(sbi);
    kunmap(new_page);
    f2fs_put_page(new_page, 0);
out_dir:
    if (old_dir_entry) {
        kunmap(old_dir_page);
        f2fs_put_page(old_dir_page, 0);
    }
out_old:
    kunmap(old_page);
    f2fs_put_page(old_page, 0);
out:
    return err;
}

const struct inode_operations f2fs_dir_inode_operations = {
    .create		= f2fs_create,
    .lookup		= f2fs_lookup,
    .link		= f2fs_link,
    .unlink		= f2fs_unlink,
    .symlink	= f2fs_symlink,
    .mkdir		= f2fs_mkdir,
    .rmdir		= f2fs_rmdir,
    .mknod		= f2fs_mknod,
    .rename		= f2fs_rename,
    .getattr	= f2fs_getattr,
    .setattr	= f2fs_setattr,
    .get_acl	= f2fs_get_acl,
#ifdef CONFIG_F2FS_FS_XATTR
    .setxattr	= generic_setxattr,
    .getxattr	= generic_getxattr,
    .listxattr	= f2fs_listxattr,
    .removexattr	= generic_removexattr,
#endif
};

const struct inode_operations f2fs_symlink_inode_operations = {
    .readlink       = generic_readlink,
    .follow_link    = page_follow_link_light,
    .put_link       = page_put_link,
    .getattr	= f2fs_getattr,
    .setattr	= f2fs_setattr,
#ifdef CONFIG_F2FS_FS_XATTR
    .setxattr	= generic_setxattr,
    .getxattr	= generic_getxattr,
    .listxattr	= f2fs_listxattr,
    .removexattr	= generic_removexattr,
#endif
};

const struct inode_operations f2fs_special_inode_operations = {
    .getattr	= f2fs_getattr,
    .setattr        = f2fs_setattr,
    .get_acl	= f2fs_get_acl,
#ifdef CONFIG_F2FS_FS_XATTR
    .setxattr       = generic_setxattr,
    .getxattr       = generic_getxattr,
    .listxattr	= f2fs_listxattr,
    .removexattr    = generic_removexattr,
#endif
};
コード例 #23
0
static int reiserfs_rmdir(struct inode *dir, struct dentry *dentry)
{
	int retval, err;
	struct inode *inode;
	struct reiserfs_transaction_handle th;
	int jbegin_count;
	INITIALIZE_PATH(path);
	struct reiserfs_dir_entry de;

	/* we will be doing 2 balancings and update 2 stat data, we change quotas
	 * of the owner of the directory and of the owner of the parent directory.
	 * The quota structure is possibly deleted only on last iput => outside
	 * of this transaction */
	jbegin_count =
	    JOURNAL_PER_BALANCE_CNT * 2 + 2 +
	    4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);

	dquot_initialize(dir);

	reiserfs_write_lock(dir->i_sb);
	retval = journal_begin(&th, dir->i_sb, jbegin_count);
	if (retval)
		goto out_rmdir;

	de.de_gen_number_bit_string = NULL;
	if ((retval =
	     reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len,
				 &path, &de)) == NAME_NOT_FOUND) {
		retval = -ENOENT;
		goto end_rmdir;
	} else if (retval == IO_ERROR) {
		retval = -EIO;
		goto end_rmdir;
	}

	inode = dentry->d_inode;

	reiserfs_update_inode_transaction(inode);
	reiserfs_update_inode_transaction(dir);

	if (de.de_objectid != inode->i_ino) {
		// FIXME: compare key of an object and a key found in the
		// entry
		retval = -EIO;
		goto end_rmdir;
	}
	if (!reiserfs_empty_dir(inode)) {
		retval = -ENOTEMPTY;
		goto end_rmdir;
	}

	/* cut entry from dir directory */
	retval = reiserfs_cut_from_item(&th, &path, &(de.de_entry_key), dir, NULL,	/* page */
					0 /*new file size - not used here */ );
	if (retval < 0)
		goto end_rmdir;

	if (inode->i_nlink != 2 && inode->i_nlink != 1)
		reiserfs_error(inode->i_sb, "reiserfs-7040",
			       "empty directory has nlink != 2 (%d)",
			       inode->i_nlink);

	clear_nlink(inode);
	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
	reiserfs_update_sd(&th, inode);

	DEC_DIR_INODE_NLINK(dir)
	    dir->i_size -= (DEH_SIZE + de.de_entrylen);
	reiserfs_update_sd(&th, dir);

	/* prevent empty directory from getting lost */
	add_save_link(&th, inode, 0 /* not truncate */ );

	retval = journal_end(&th, dir->i_sb, jbegin_count);
	reiserfs_check_path(&path);
      out_rmdir:
	reiserfs_write_unlock(dir->i_sb);
	return retval;

      end_rmdir:
	/* we must release path, because we did not call
	   reiserfs_cut_from_item, or reiserfs_cut_from_item does not
	   release path if operation was not complete */
	pathrelse(&path);
	err = journal_end(&th, dir->i_sb, jbegin_count);
	reiserfs_write_unlock(dir->i_sb);
	return err ? err : retval;
}
コード例 #24
0
ファイル: inode.c プロジェクト: SiddheshK15/WR2-Kernel
struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
{
	struct super_block *sb = dir->i_sb;
	struct the_nilfs *nilfs = sb->s_fs_info;
	struct inode *inode;
	struct nilfs_inode_info *ii;
	struct nilfs_root *root;
	int err = -ENOMEM;
	ino_t ino;

	inode = new_inode(sb);
	if (unlikely(!inode))
		goto failed;

	mapping_set_gfp_mask(inode->i_mapping,
			     mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);

	root = NILFS_I(dir)->i_root;
	ii = NILFS_I(inode);
	ii->i_state = 1 << NILFS_I_NEW;
	ii->i_root = root;

	err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh);
	if (unlikely(err))
		goto failed_ifile_create_inode;
	/* reference count of i_bh inherits from nilfs_mdt_read_block() */

	atomic_inc(&root->inodes_count);
	inode_init_owner(inode, dir, mode);
	inode->i_ino = ino;
	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;

	if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
		err = nilfs_bmap_read(ii->i_bmap, NULL);
		if (err < 0)
			goto failed_bmap;

		set_bit(NILFS_I_BMAP, &ii->i_state);
		/* No lock is needed; iget() ensures it. */
	}

	ii->i_flags = nilfs_mask_flags(
		mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED);

	/* ii->i_file_acl = 0; */
	/* ii->i_dir_acl = 0; */
	ii->i_dir_start_lookup = 0;
	nilfs_set_inode_flags(inode);
	spin_lock(&nilfs->ns_next_gen_lock);
	inode->i_generation = nilfs->ns_next_generation++;
	spin_unlock(&nilfs->ns_next_gen_lock);
	insert_inode_hash(inode);

	err = nilfs_init_acl(inode, dir);
	if (unlikely(err))
		goto failed_acl; /* never occur. When supporting
				    nilfs_init_acl(), proper cancellation of
				    above jobs should be considered */

	return inode;

 failed_acl:
 failed_bmap:
	clear_nlink(inode);
	iput(inode);  /* raw_inode will be deleted through
			 generic_delete_inode() */
	goto failed;

 failed_ifile_create_inode:
	make_bad_inode(inode);
	iput(inode);  /* if i_nlink == 1, generic_forget_inode() will be
			 called */
 failed:
	return ERR_PTR(err);
}
コード例 #25
0
ファイル: dir.c プロジェクト: rrowicki/Chrono_Kernel-1
static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
			 struct inode *new_dir_i, struct dentry *new_dentry)
{
	int ret;
	struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
	struct jffs2_inode_info *victim_f = NULL;
	uint8_t type;
	uint32_t now;

	/* The VFS will check for us and prevent trying to rename a
	 * file over a directory and vice versa, but if it's a directory,
	 * the VFS can't check whether the victim is empty. The filesystem
	 * needs to do that for itself.
	 */
	if (new_dentry->d_inode) {
		victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
		if (S_ISDIR(new_dentry->d_inode->i_mode)) {
			struct jffs2_full_dirent *fd;

			mutex_lock(&victim_f->sem);
			for (fd = victim_f->dents; fd; fd = fd->next) {
				if (fd->ino) {
					mutex_unlock(&victim_f->sem);
					return -ENOTEMPTY;
				}
			}
			mutex_unlock(&victim_f->sem);
		}
	}

	/* XXX: We probably ought to alloc enough space for
	   both nodes at the same time. Writing the new link,
	   then getting -ENOSPC, is quite bad :)
	*/

	/* Make a hard link */

	/* XXX: This is ugly */
	type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
	if (!type) type = DT_REG;

	now = get_seconds();
	ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i),
			    old_dentry->d_inode->i_ino, type,
			    new_dentry->d_name.name, new_dentry->d_name.len, now);

	if (ret)
		return ret;

	if (victim_f) {
		/* There was a victim. Kill it off nicely */
		if (S_ISDIR(new_dentry->d_inode->i_mode))
			clear_nlink(new_dentry->d_inode);
		else
			drop_nlink(new_dentry->d_inode);
		/* Don't oops if the victim was a dirent pointing to an
		   inode which didn't exist. */
		if (victim_f->inocache) {
			mutex_lock(&victim_f->sem);
			if (S_ISDIR(new_dentry->d_inode->i_mode))
				victim_f->inocache->pino_nlink = 0;
			else
				victim_f->inocache->pino_nlink--;
			mutex_unlock(&victim_f->sem);
		}
	}

	/* If it was a directory we moved, and there was no victim,
	   increase i_nlink on its new parent */
	if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
		inc_nlink(new_dir_i);

	/* Unlink the original */
	ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i),
			      old_dentry->d_name.name, old_dentry->d_name.len, NULL, now);

	/* We don't touch inode->i_nlink */

	if (ret) {
		/* Oh shit. We really ought to make a single node which can do both atomically */
		struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
		mutex_lock(&f->sem);
		inc_nlink(old_dentry->d_inode);
		if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode))
			f->inocache->pino_nlink++;
		mutex_unlock(&f->sem);

;
		/* Might as well let the VFS know */
		d_instantiate(new_dentry, old_dentry->d_inode);
		ihold(old_dentry->d_inode);
		new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
		return ret;
	}

	if (S_ISDIR(old_dentry->d_inode->i_mode))
		drop_nlink(old_dir_i);

	new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);

	return 0;
}
コード例 #26
0
ファイル: zfs_dir.c プロジェクト: ColinIanKing/zfs
/*
 * Unlink zp from dl, and mark zp for deletion if this was the last link. Can
 * fail if zp is a mount point (EBUSY) or a non-empty directory (ENOTEMPTY).
 * If 'unlinkedp' is NULL, we put unlinked znodes on the unlinked list.
 * If it's non-NULL, we use it to indicate whether the znode needs deletion,
 * and it's the caller's job to do it.
 */
int
zfs_link_destroy(zfs_dirlock_t *dl, znode_t *zp, dmu_tx_t *tx, int flag,
    boolean_t *unlinkedp)
{
	znode_t *dzp = dl->dl_dzp;
	zfsvfs_t *zfsvfs = ZTOZSB(dzp);
	int zp_is_dir = S_ISDIR(ZTOI(zp)->i_mode);
	boolean_t unlinked = B_FALSE;
	sa_bulk_attr_t bulk[5];
	uint64_t mtime[2], ctime[2];
	uint64_t links;
	int count = 0;
	int error;

#ifdef HAVE_DNLC
	dnlc_remove(ZTOI(dzp), dl->dl_name);
#endif /* HAVE_DNLC */

	if (!(flag & ZRENAMING)) {
		mutex_enter(&zp->z_lock);

		if (zp_is_dir && !zfs_dirempty(zp)) {
			mutex_exit(&zp->z_lock);
			return (SET_ERROR(ENOTEMPTY));
		}

		/*
		 * If we get here, we are going to try to remove the object.
		 * First try removing the name from the directory; if that
		 * fails, return the error.
		 */
		error = zfs_dropname(dl, zp, dzp, tx, flag);
		if (error != 0) {
			mutex_exit(&zp->z_lock);
			return (error);
		}

		if (ZTOI(zp)->i_nlink <= zp_is_dir) {
			zfs_panic_recover("zfs: link count on %lu is %u, "
			    "should be at least %u", zp->z_id,
			    (int)ZTOI(zp)->i_nlink, zp_is_dir + 1);
			set_nlink(ZTOI(zp), zp_is_dir + 1);
		}
		drop_nlink(ZTOI(zp));
		if (ZTOI(zp)->i_nlink == zp_is_dir) {
			zp->z_unlinked = B_TRUE;
			clear_nlink(ZTOI(zp));
			unlinked = B_TRUE;
		} else {
			SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs),
			    NULL, &ctime, sizeof (ctime));
			SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
			    NULL, &zp->z_pflags, sizeof (zp->z_pflags));
			zfs_tstamp_update_setup(zp, STATE_CHANGED, mtime,
			    ctime);
		}
		links = ZTOI(zp)->i_nlink;
		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs),
		    NULL, &links, sizeof (links));
		error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
		count = 0;
		ASSERT(error == 0);
		mutex_exit(&zp->z_lock);
	} else {
		error = zfs_dropname(dl, zp, dzp, tx, flag);
		if (error != 0)
			return (error);
	}

	mutex_enter(&dzp->z_lock);
	dzp->z_size--;		/* one dirent removed */
	if (zp_is_dir)
		drop_nlink(ZTOI(dzp));	/* ".." link from zp */
	links = ZTOI(dzp)->i_nlink;
	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs),
	    NULL, &links, sizeof (links));
	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs),
	    NULL, &dzp->z_size, sizeof (dzp->z_size));
	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs),
	    NULL, ctime, sizeof (ctime));
	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs),
	    NULL, mtime, sizeof (mtime));
	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
	    NULL, &dzp->z_pflags, sizeof (dzp->z_pflags));
	zfs_tstamp_update_setup(dzp, CONTENT_MODIFIED, mtime, ctime);
	error = sa_bulk_update(dzp->z_sa_hdl, bulk, count, tx);
	ASSERT(error == 0);
	mutex_exit(&dzp->z_lock);

	if (unlinkedp != NULL)
		*unlinkedp = unlinked;
	else if (unlinked)
		zfs_unlinked_add(zp, tx);

	return (0);
}
コード例 #27
0
int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
			     u64 child_nodeid, struct qstr *name)
{
	int err = -ENOTDIR;
	struct inode *parent;
	struct dentry *dir;
	struct dentry *entry;

	parent = ilookup5(sb, parent_nodeid, fuse_inode_eq, &parent_nodeid);
	if (!parent)
		return -ENOENT;

	mutex_lock(&parent->i_mutex);
	if (!S_ISDIR(parent->i_mode))
		goto unlock;

	err = -ENOENT;
	dir = d_find_alias(parent);
	if (!dir)
		goto unlock;

	entry = d_lookup(dir, name);
	dput(dir);
	if (!entry)
		goto unlock;

	fuse_invalidate_attr(parent);
	fuse_invalidate_entry(entry);

	if (child_nodeid != 0 && entry->d_inode) {
		mutex_lock(&entry->d_inode->i_mutex);
		if (get_node_id(entry->d_inode) != child_nodeid) {
			err = -ENOENT;
			goto badentry;
		}
		if (d_mountpoint(entry)) {
			err = -EBUSY;
			goto badentry;
		}
		if (S_ISDIR(entry->d_inode->i_mode)) {
			shrink_dcache_parent(entry);
			if (!simple_empty(entry)) {
				err = -ENOTEMPTY;
				goto badentry;
			}
			entry->d_inode->i_flags |= S_DEAD;
		}
		dont_mount(entry);
		clear_nlink(entry->d_inode);
		err = 0;
 badentry:
		mutex_unlock(&entry->d_inode->i_mutex);
		if (!err)
			d_delete(entry);
	} else {
		err = 0;
	}
	dput(entry);

 unlock:
	mutex_unlock(&parent->i_mutex);
	iput(parent);
	return err;
}
コード例 #28
0
/*
 * process, that is going to call fix_nodes/do_balance must hold only
 * one path. If it holds 2 or more, it can get into endless waiting in
 * get_empty_nodes or its clones
 */
static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry,
			   struct inode *new_dir, struct dentry *new_dentry)
{
	int retval;
	INITIALIZE_PATH(old_entry_path);
	INITIALIZE_PATH(new_entry_path);
	INITIALIZE_PATH(dot_dot_entry_path);
	struct item_head new_entry_ih, old_entry_ih, dot_dot_ih;
	struct reiserfs_dir_entry old_de, new_de, dot_dot_de;
	struct inode *old_inode, *new_dentry_inode;
	struct reiserfs_transaction_handle th;
	int jbegin_count;
	umode_t old_inode_mode;
	unsigned long savelink = 1;
	struct timespec ctime;

	/* three balancings: (1) old name removal, (2) new name insertion
	   and (3) maybe "save" link insertion
	   stat data updates: (1) old directory,
	   (2) new directory and (3) maybe old object stat data (when it is
	   directory) and (4) maybe stat data of object to which new entry
	   pointed initially and (5) maybe block containing ".." of
	   renamed directory
	   quota updates: two parent directories */
	jbegin_count =
	    JOURNAL_PER_BALANCE_CNT * 3 + 5 +
	    4 * REISERFS_QUOTA_TRANS_BLOCKS(old_dir->i_sb);

	dquot_initialize(old_dir);
	dquot_initialize(new_dir);

	old_inode = old_dentry->d_inode;
	new_dentry_inode = new_dentry->d_inode;

	// make sure, that oldname still exists and points to an object we
	// are going to rename
	old_de.de_gen_number_bit_string = NULL;
	reiserfs_write_lock(old_dir->i_sb);
	retval =
	    reiserfs_find_entry(old_dir, old_dentry->d_name.name,
				old_dentry->d_name.len, &old_entry_path,
				&old_de);
	pathrelse(&old_entry_path);
	if (retval == IO_ERROR) {
		reiserfs_write_unlock(old_dir->i_sb);
		return -EIO;
	}

	if (retval != NAME_FOUND || old_de.de_objectid != old_inode->i_ino) {
		reiserfs_write_unlock(old_dir->i_sb);
		return -ENOENT;
	}

	old_inode_mode = old_inode->i_mode;
	if (S_ISDIR(old_inode_mode)) {
		// make sure, that directory being renamed has correct ".."
		// and that its new parent directory has not too many links
		// already

		if (new_dentry_inode) {
			if (!reiserfs_empty_dir(new_dentry_inode)) {
				reiserfs_write_unlock(old_dir->i_sb);
				return -ENOTEMPTY;
			}
		}

		/* directory is renamed, its parent directory will be changed,
		 ** so find ".." entry
		 */
		dot_dot_de.de_gen_number_bit_string = NULL;
		retval =
		    reiserfs_find_entry(old_inode, "..", 2, &dot_dot_entry_path,
					&dot_dot_de);
		pathrelse(&dot_dot_entry_path);
		if (retval != NAME_FOUND) {
			reiserfs_write_unlock(old_dir->i_sb);
			return -EIO;
		}

		/* inode number of .. must equal old_dir->i_ino */
		if (dot_dot_de.de_objectid != old_dir->i_ino) {
			reiserfs_write_unlock(old_dir->i_sb);
			return -EIO;
		}
	}

	retval = journal_begin(&th, old_dir->i_sb, jbegin_count);
	if (retval) {
		reiserfs_write_unlock(old_dir->i_sb);
		return retval;
	}

	/* add new entry (or find the existing one) */
	retval =
	    reiserfs_add_entry(&th, new_dir, new_dentry->d_name.name,
			       new_dentry->d_name.len, old_inode, 0);
	if (retval == -EEXIST) {
		if (!new_dentry_inode) {
			reiserfs_panic(old_dir->i_sb, "vs-7050",
				       "new entry is found, new inode == 0");
		}
	} else if (retval) {
		int err = journal_end(&th, old_dir->i_sb, jbegin_count);
		reiserfs_write_unlock(old_dir->i_sb);
		return err ? err : retval;
	}

	reiserfs_update_inode_transaction(old_dir);
	reiserfs_update_inode_transaction(new_dir);

	/* this makes it so an fsync on an open fd for the old name will
	 ** commit the rename operation
	 */
	reiserfs_update_inode_transaction(old_inode);

	if (new_dentry_inode)
		reiserfs_update_inode_transaction(new_dentry_inode);

	while (1) {
		// look for old name using corresponding entry key (found by reiserfs_find_entry)
		if ((retval =
		     search_by_entry_key(new_dir->i_sb, &old_de.de_entry_key,
					 &old_entry_path,
					 &old_de)) != NAME_FOUND) {
			pathrelse(&old_entry_path);
			journal_end(&th, old_dir->i_sb, jbegin_count);
			reiserfs_write_unlock(old_dir->i_sb);
			return -EIO;
		}

		copy_item_head(&old_entry_ih, get_ih(&old_entry_path));

		reiserfs_prepare_for_journal(old_inode->i_sb, old_de.de_bh, 1);

		// look for new name by reiserfs_find_entry
		new_de.de_gen_number_bit_string = NULL;
		retval =
		    reiserfs_find_entry(new_dir, new_dentry->d_name.name,
					new_dentry->d_name.len, &new_entry_path,
					&new_de);
		// reiserfs_add_entry should not return IO_ERROR, because it is called with essentially same parameters from
		// reiserfs_add_entry above, and we'll catch any i/o errors before we get here.
		if (retval != NAME_FOUND_INVISIBLE && retval != NAME_FOUND) {
			pathrelse(&new_entry_path);
			pathrelse(&old_entry_path);
			journal_end(&th, old_dir->i_sb, jbegin_count);
			reiserfs_write_unlock(old_dir->i_sb);
			return -EIO;
		}

		copy_item_head(&new_entry_ih, get_ih(&new_entry_path));

		reiserfs_prepare_for_journal(old_inode->i_sb, new_de.de_bh, 1);

		if (S_ISDIR(old_inode->i_mode)) {
			if ((retval =
			     search_by_entry_key(new_dir->i_sb,
						 &dot_dot_de.de_entry_key,
						 &dot_dot_entry_path,
						 &dot_dot_de)) != NAME_FOUND) {
				pathrelse(&dot_dot_entry_path);
				pathrelse(&new_entry_path);
				pathrelse(&old_entry_path);
				journal_end(&th, old_dir->i_sb, jbegin_count);
				reiserfs_write_unlock(old_dir->i_sb);
				return -EIO;
			}
			copy_item_head(&dot_dot_ih,
				       get_ih(&dot_dot_entry_path));
			// node containing ".." gets into transaction
			reiserfs_prepare_for_journal(old_inode->i_sb,
						     dot_dot_de.de_bh, 1);
		}
		/* we should check seals here, not do
		   this stuff, yes? Then, having
		   gathered everything into RAM we
		   should lock the buffers, yes?  -Hans */
		/* probably.  our rename needs to hold more
		 ** than one path at once.  The seals would
		 ** have to be written to deal with multi-path
		 ** issues -chris
		 */
		/* sanity checking before doing the rename - avoid races many
		 ** of the above checks could have scheduled.  We have to be
		 ** sure our items haven't been shifted by another process.
		 */
		if (item_moved(&new_entry_ih, &new_entry_path) ||
		    !entry_points_to_object(new_dentry->d_name.name,
					    new_dentry->d_name.len,
					    &new_de, new_dentry_inode) ||
		    item_moved(&old_entry_ih, &old_entry_path) ||
		    !entry_points_to_object(old_dentry->d_name.name,
					    old_dentry->d_name.len,
					    &old_de, old_inode)) {
			reiserfs_restore_prepared_buffer(old_inode->i_sb,
							 new_de.de_bh);
			reiserfs_restore_prepared_buffer(old_inode->i_sb,
							 old_de.de_bh);
			if (S_ISDIR(old_inode_mode))
				reiserfs_restore_prepared_buffer(old_inode->
								 i_sb,
								 dot_dot_de.
								 de_bh);
			continue;
		}
		if (S_ISDIR(old_inode_mode)) {
			if (item_moved(&dot_dot_ih, &dot_dot_entry_path) ||
			    !entry_points_to_object("..", 2, &dot_dot_de,
						    old_dir)) {
				reiserfs_restore_prepared_buffer(old_inode->
								 i_sb,
								 old_de.de_bh);
				reiserfs_restore_prepared_buffer(old_inode->
								 i_sb,
								 new_de.de_bh);
				reiserfs_restore_prepared_buffer(old_inode->
								 i_sb,
								 dot_dot_de.
								 de_bh);
				continue;
			}
		}

		RFALSE(S_ISDIR(old_inode_mode) &&
		       !buffer_journal_prepared(dot_dot_de.de_bh), "");

		break;
	}

	/* ok, all the changes can be done in one fell swoop when we
	   have claimed all the buffers needed. */

	mark_de_visible(new_de.de_deh + new_de.de_entry_num);
	set_ino_in_dir_entry(&new_de, INODE_PKEY(old_inode));
	journal_mark_dirty(&th, old_dir->i_sb, new_de.de_bh);

	mark_de_hidden(old_de.de_deh + old_de.de_entry_num);
	journal_mark_dirty(&th, old_dir->i_sb, old_de.de_bh);
	ctime = CURRENT_TIME_SEC;
	old_dir->i_ctime = old_dir->i_mtime = ctime;
	new_dir->i_ctime = new_dir->i_mtime = ctime;
	/* thanks to Alex Adriaanse <*****@*****.**> for patch which adds ctime update of
	   renamed object */
	old_inode->i_ctime = ctime;

	if (new_dentry_inode) {
		// adjust link number of the victim
		if (S_ISDIR(new_dentry_inode->i_mode)) {
			clear_nlink(new_dentry_inode);
		} else {
			drop_nlink(new_dentry_inode);
		}
		new_dentry_inode->i_ctime = ctime;
		savelink = new_dentry_inode->i_nlink;
	}

	if (S_ISDIR(old_inode_mode)) {
		/* adjust ".." of renamed directory */
		set_ino_in_dir_entry(&dot_dot_de, INODE_PKEY(new_dir));
		journal_mark_dirty(&th, new_dir->i_sb, dot_dot_de.de_bh);

		if (!new_dentry_inode)
			/* there (in new_dir) was no directory, so it got new link
			   (".."  of renamed directory) */
			INC_DIR_INODE_NLINK(new_dir);

		/* old directory lost one link - ".. " of renamed directory */
		DEC_DIR_INODE_NLINK(old_dir);
	}
	// looks like in 2.3.99pre3 brelse is atomic. so we can use pathrelse
	pathrelse(&new_entry_path);
	pathrelse(&dot_dot_entry_path);

	// FIXME: this reiserfs_cut_from_item's return value may screw up
	// anybody, but it will panic if will not be able to find the
	// entry. This needs one more clean up
	if (reiserfs_cut_from_item
	    (&th, &old_entry_path, &(old_de.de_entry_key), old_dir, NULL,
	     0) < 0)
		reiserfs_error(old_dir->i_sb, "vs-7060",
			       "couldn't not cut old name. Fsck later?");

	old_dir->i_size -= DEH_SIZE + old_de.de_entrylen;

	reiserfs_update_sd(&th, old_dir);
	reiserfs_update_sd(&th, new_dir);
	reiserfs_update_sd(&th, old_inode);

	if (new_dentry_inode) {
		if (savelink == 0)
			add_save_link(&th, new_dentry_inode,
				      0 /* not truncate */ );
		reiserfs_update_sd(&th, new_dentry_inode);
	}

	retval = journal_end(&th, old_dir->i_sb, jbegin_count);
	reiserfs_write_unlock(old_dir->i_sb);
	return retval;
}
コード例 #29
0
ファイル: namei.c プロジェクト: AICP/kernel_moto_shamu
static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
		struct inode *new_dir, struct dentry *new_dentry)
{
	const unsigned char *old_name = old_dentry->d_name.name;
	unsigned old_len = old_dentry->d_name.len;
	const unsigned char *new_name = new_dentry->d_name.name;
	unsigned new_len = new_dentry->d_name.len;
	struct inode *i = old_dentry->d_inode;
	struct inode *new_inode = new_dentry->d_inode;
	struct quad_buffer_head qbh, qbh1;
	struct hpfs_dirent *dep, *nde;
	struct hpfs_dirent de;
	dnode_secno dno;
	int r;
	struct buffer_head *bh;
	struct fnode *fnode;
	int err;

	if ((err = hpfs_chk_name(new_name, &new_len))) return err;
	err = 0;
	hpfs_adjust_length(old_name, &old_len);

	hpfs_lock(i->i_sb);
	/* order doesn't matter, due to VFS exclusion */
	
	/* Erm? Moving over the empty non-busy directory is perfectly legal */
	if (new_inode && S_ISDIR(new_inode->i_mode)) {
		err = -EINVAL;
		goto end1;
	}

	if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
		hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
		err = -ENOENT;
		goto end1;
	}
	copy_de(&de, dep);
	de.hidden = new_name[0] == '.';

	if (new_inode) {
		int r;
		if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
			if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
				clear_nlink(new_inode);
				copy_de(nde, &de);
				memcpy(nde->name, new_name, new_len);
				hpfs_mark_4buffers_dirty(&qbh1);
				hpfs_brelse4(&qbh1);
				goto end;
			}
			hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent");
			err = -EFSERROR;
			goto end1;
		}
		err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0;
		goto end1;
	}

	if (new_dir == old_dir) hpfs_brelse4(&qbh);

	if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) {
		if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
		err = r == 1 ? -ENOSPC : -EFSERROR;
		if (new_dir != old_dir) hpfs_brelse4(&qbh);
		goto end1;
	}
	
	if (new_dir == old_dir)
		if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
			hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
			err = -ENOENT;
			goto end1;
		}

	if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
		hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
		err = r == 2 ? -ENOSPC : -EFSERROR;
		goto end1;
	}

end:
	hpfs_i(i)->i_parent_dir = new_dir->i_ino;
	if (S_ISDIR(i->i_mode)) {
		inc_nlink(new_dir);
		drop_nlink(old_dir);
	}
	if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
		fnode->up = cpu_to_le32(new_dir->i_ino);
		fnode->len = new_len;
		memcpy(fnode->name, new_name, new_len>15?15:new_len);
		if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len);
		mark_buffer_dirty(bh);
		brelse(bh);
	}
end1:
	if (!err) {
		hpfs_update_directory_times(old_dir);
		hpfs_update_directory_times(new_dir);
	}
	hpfs_unlock(i->i_sb);
	return err;
}
コード例 #30
0
static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
	int retval;
	struct inode *inode;
	struct reiserfs_transaction_handle th;
	struct reiserfs_security_handle security;
	int lock_depth;
	/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
	int jbegin_count =
	    JOURNAL_PER_BALANCE_CNT * 3 +
	    2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
		 REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));

	dquot_initialize(dir);

#ifdef DISPLACE_NEW_PACKING_LOCALITIES
	/* set flag that new packing locality created and new blocks for the content     * of that directory are not displaced yet */
	REISERFS_I(dir)->new_packing_locality = 1;
#endif
	mode = S_IFDIR | mode;
	if (!(inode = new_inode(dir->i_sb))) {
		return -ENOMEM;
	}
	new_inode_init(inode, dir, mode);

	jbegin_count += reiserfs_cache_default_acl(dir);
	retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security);
	if (retval < 0) {
		drop_new_inode(inode);
		return retval;
	}
	jbegin_count += retval;
	lock_depth = reiserfs_write_lock_once(dir->i_sb);

	retval = journal_begin(&th, dir->i_sb, jbegin_count);
	if (retval) {
		drop_new_inode(inode);
		goto out_failed;
	}

	/* inc the link count now, so another writer doesn't overflow it while
	 ** we sleep later on.
	 */
	INC_DIR_INODE_NLINK(dir)

	    retval = reiserfs_new_inode(&th, dir, mode, NULL /*symlink */ ,
					old_format_only(dir->i_sb) ?
					EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE,
					dentry, inode, &security);
	if (retval) {
		DEC_DIR_INODE_NLINK(dir)
		goto out_failed;
	}

	reiserfs_update_inode_transaction(inode);
	reiserfs_update_inode_transaction(dir);

	inode->i_op = &reiserfs_dir_inode_operations;
	inode->i_fop = &reiserfs_dir_operations;

	// note, _this_ add_entry will not update dir's stat data
	retval =
	    reiserfs_add_entry(&th, dir, dentry->d_name.name,
			       dentry->d_name.len, inode, 1 /*visible */ );
	if (retval) {
		int err;
		clear_nlink(inode);
		DEC_DIR_INODE_NLINK(dir);
		reiserfs_update_sd(&th, inode);
		err = journal_end(&th, dir->i_sb, jbegin_count);
		if (err)
			retval = err;
		unlock_new_inode(inode);
		iput(inode);
		goto out_failed;
	}
	// the above add_entry did not update dir's stat data
	reiserfs_update_sd(&th, dir);

	unlock_new_inode(inode);
	d_instantiate(dentry, inode);
	retval = journal_end(&th, dir->i_sb, jbegin_count);
out_failed:
	reiserfs_write_unlock_once(dir->i_sb, lock_depth);
	return retval;
}