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;
}
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;
}
Example #3
0
static int reiserfs_rmdir (struct inode * dir, struct dentry *dentry)
{
    int retval;
    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 */
    jbegin_count = JOURNAL_PER_BALANCE_CNT * 2 + 2;

    reiserfs_write_lock(dir->i_sb);
    journal_begin(&th, dir->i_sb, jbegin_count) ;

    de.de_gen_number_bit_string = 0;
    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_warning (inode->i_sb, "%s: empty directory has nlink "
			  "!= 2 (%d)", __FUNCTION__, inode->i_nlink);

    inode->i_nlink = 0;
    inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
    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 */);

    journal_end(&th, dir->i_sb, jbegin_count) ;
    reiserfs_check_path(&path) ;
    reiserfs_write_unlock(dir->i_sb);
    return 0;
	
 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);
    journal_end(&th, dir->i_sb, jbegin_count) ;
    reiserfs_write_unlock(dir->i_sb);
    return retval;	
}
/*
 * 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;
}
Example #5
0
static int reiserfs_mkdir (struct inode * dir, struct dentry *dentry, int mode)
{
    int retval;
    struct inode * inode;
    struct reiserfs_transaction_handle th ;
    int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3; 
    int locked;

#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 ;
    }
    retval = new_inode_init(inode, dir, mode);
    if (retval)
        return retval;

    locked = reiserfs_cache_default_acl (dir);

    reiserfs_write_lock(dir->i_sb);
    if (locked)
        reiserfs_write_lock_xattrs (dir->i_sb);
    journal_begin(&th, dir->i_sb, jbegin_count) ;

    /* 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, 0/*symlink*/,
				old_format_only (dir->i_sb) ? 
				EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE,
				dentry, inode);
    if (locked)
        reiserfs_write_unlock_xattrs (dir->i_sb);

    if (retval) {
	dir->i_nlink-- ;
	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) {
	inode->i_nlink = 0;
	DEC_DIR_INODE_NLINK(dir);
	reiserfs_update_sd (&th, inode);
	journal_end(&th, dir->i_sb, jbegin_count) ;
	iput (inode);
	goto out_failed;
    }

    // the above add_entry did not update dir's stat data
    reiserfs_update_sd (&th, dir);

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