Ejemplo n.º 1
0
/*
 * This fuction deallocates an inode
 */
static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
{
	ext2_filsys fs = ctx->fs;
	struct ext2_inode	inode;
	struct problem_context	pctx;
	__u32			count;
	struct del_block	del_block;

	e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
	e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
	clear_problem_context(&pctx);
	pctx.ino = ino;

	/*
	 * Fix up the bitmaps...
	 */
	e2fsck_read_bitmaps(ctx);
	ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));

	if (ext2fs_file_acl_block(fs, &inode) &&
	    (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) {
		pctx.errcode = ext2fs_adjust_ea_refcount3(fs,
				ext2fs_file_acl_block(fs, &inode),
				block_buf, -1, &count, ino);
		if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
			pctx.errcode = 0;
			count = 1;
		}
		if (pctx.errcode) {
			pctx.blk = ext2fs_file_acl_block(fs, &inode);
			fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			return;
		}
		if (count == 0) {
			ext2fs_unmark_block_bitmap2(ctx->block_found_map,
					ext2fs_file_acl_block(fs, &inode));
			ext2fs_block_alloc_stats2(fs,
				  ext2fs_file_acl_block(fs, &inode), -1);
		}
		ext2fs_file_acl_block_set(fs, &inode, 0);
	}

	if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
		return;

	if (LINUX_S_ISREG(inode.i_mode) && EXT2_I_SIZE(&inode) >= 0x80000000UL)
		ctx->large_files--;

	del_block.ctx = ctx;
	del_block.num = 0;
	pctx.errcode = ext2fs_block_iterate3(fs, ino, 0, block_buf,
					     deallocate_inode_block,
					     &del_block);
	if (pctx.errcode) {
		fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}
}
Ejemplo n.º 2
0
/*
 * This routine is called when an inode is not connected to the
 * directory tree.
 *
 * This subroutine returns 1 then the caller shouldn't bother with the
 * rest of the pass 4 tests.
 */
static int disconnect_inode(e2fsck_t ctx, ext2_ino_t i,
			    struct ext2_inode *inode)
{
	ext2_filsys fs = ctx->fs;
	struct problem_context	pctx;
	__u32 eamagic = 0;
	int extra_size = 0;

	if (EXT2_INODE_SIZE(fs->super) > EXT2_GOOD_OLD_INODE_SIZE) {
		e2fsck_read_inode_full(ctx, i, inode,EXT2_INODE_SIZE(fs->super),
				       "pass4: disconnect_inode");
		extra_size = ((struct ext2_inode_large *)inode)->i_extra_isize;
	} else {
		e2fsck_read_inode(ctx, i, inode, "pass4: disconnect_inode");
	}
	clear_problem_context(&pctx);
	pctx.ino = i;
	pctx.inode = inode;

	if (EXT2_INODE_SIZE(fs->super) -EXT2_GOOD_OLD_INODE_SIZE -extra_size >0)
		eamagic = *(__u32 *)(((char *)inode) +EXT2_GOOD_OLD_INODE_SIZE +
				     extra_size);
	/*
	 * Offer to delete any zero-length files that does not have
	 * blocks.  If there is an EA block, it might have useful
	 * information, so we won't prompt to delete it, but let it be
	 * reconnected to lost+found.
	 */
	if (!inode->i_blocks && eamagic != EXT2_EXT_ATTR_MAGIC &&
	    (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode))) {
		if (fix_problem(ctx, PR_4_ZERO_LEN_INODE, &pctx)) {
			e2fsck_clear_inode(ctx, i, inode, 0,
					   "disconnect_inode");
			/*
			 * Fix up the bitmaps...
			 */
			e2fsck_read_bitmaps(ctx);
			ext2fs_inode_alloc_stats2(fs, i, -1,
						  LINUX_S_ISDIR(inode->i_mode));
			return 0;
		}
	}

	/*
	 * Prompt to reconnect.
	 */
	if (fix_problem(ctx, PR_4_UNATTACHED_INODE, &pctx)) {
		if (e2fsck_reconnect_file(ctx, i))
			ext2fs_unmark_valid(fs);
	} else {
		/*
		 * If we don't attach the inode, then skip the
		 * i_links_test since there's no point in trying to
		 * force i_links_count to zero.
		 */
		ext2fs_unmark_valid(fs);
		return 1;
	}
	return 0;
}
Ejemplo n.º 3
0
static errcode_t mk_hugefile(ext2_filsys fs, blk64_t num,
                             ext2_ino_t dir, unsigned long idx, ext2_ino_t *ino)

{
    errcode_t		retval;
    struct ext2_inode	inode;

    retval = ext2fs_new_inode(fs, 0, LINUX_S_IFREG, NULL, ino);
    if (retval)
        return retval;

    memset(&inode, 0, sizeof(struct ext2_inode));
    inode.i_mode = LINUX_S_IFREG | (0666 & ~fs->umask);
    inode.i_links_count = 1;
    inode.i_uid = uid & 0xFFFF;
    ext2fs_set_i_uid_high(inode, (uid >> 16) & 0xffff);
    inode.i_gid = gid & 0xFFFF;
    ext2fs_set_i_gid_high(inode, (gid >> 16) & 0xffff);

    retval = ext2fs_write_new_inode(fs, *ino, &inode);
    if (retval)
        return retval;

    ext2fs_inode_alloc_stats2(fs, *ino, +1, 0);

    if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
                                  EXT3_FEATURE_INCOMPAT_EXTENTS))
        inode.i_flags |= EXT4_EXTENTS_FL;
    retval = ext2fs_fallocate(fs,
                              EXT2_FALLOCATE_FORCE_INIT |
                              EXT2_FALLOCATE_ZERO_BLOCKS,
                              *ino, &inode, goal, 0, num);
    if (retval)
        return retval;
    retval = ext2fs_inode_size_set(fs, &inode, num * fs->blocksize);
    if (retval)
        return retval;

    retval = ext2fs_write_inode(fs, *ino, &inode);
    if (retval)
        goto errout;

    if (idx_digits)
        sprintf(fn_numbuf, "%0*lu", idx_digits, idx);
    else if (num_files > 1)
        sprintf(fn_numbuf, "%lu", idx);

retry:
    retval = ext2fs_link(fs, dir, fn_buf, *ino, EXT2_FT_REG_FILE);
    if (retval == EXT2_ET_DIR_NO_SPACE) {
        retval = ext2fs_expand_dir(fs, dir);
        if (retval)
            goto errout;
        goto retry;
    }

errout:
    return retval;
}
Ejemplo n.º 4
0
/*
 * This routine is called when an inode is not connected to the
 * directory tree.
 * 
 * This subroutine returns 1 then the caller shouldn't bother with the
 * rest of the pass 4 tests.
 */
static int disconnect_inode(e2fsck_t ctx, ext2_ino_t i)
{
	ext2_filsys fs = ctx->fs;
	struct ext2_inode	inode;
	struct problem_context	pctx;

	e2fsck_read_inode(ctx, i, &inode, "pass4: disconnect_inode");
	clear_problem_context(&pctx);
	pctx.ino = i;
	pctx.inode = &inode;
	
	/*
	 * Offer to delete any zero-length files that does not have
	 * blocks.  If there is an EA block, it might have useful
	 * information, so we won't prompt to delete it, but let it be
	 * reconnected to lost+found.
	 */
	if (!inode.i_blocks && (LINUX_S_ISREG(inode.i_mode) ||
				LINUX_S_ISDIR(inode.i_mode))) {
		if (fix_problem(ctx, PR_4_ZERO_LEN_INODE, &pctx)) {
			ext2fs_icount_store(ctx->inode_link_info, i, 0);
			inode.i_links_count = 0;
			inode.i_dtime = ctx->now;
			e2fsck_write_inode(ctx, i, &inode,
					   "disconnect_inode");
			/*
			 * Fix up the bitmaps...
			 */
			e2fsck_read_bitmaps(ctx);
			ext2fs_unmark_inode_bitmap(ctx->inode_used_map, i);
			ext2fs_unmark_inode_bitmap(ctx->inode_dir_map, i);
			ext2fs_inode_alloc_stats2(fs, i, -1,
						  LINUX_S_ISDIR(inode.i_mode));
			return 0;
		}
	}
	
	/*
	 * Prompt to reconnect.
	 */
	if (fix_problem(ctx, PR_4_UNATTACHED_INODE, &pctx)) {
		if (e2fsck_reconnect_file(ctx, i))
			ext2fs_unmark_valid(fs);
	} else {
		/*
		 * If we don't attach the inode, then skip the
		 * i_links_test since there's no point in trying to
		 * force i_links_count to zero.
		 */
		ext2fs_unmark_valid(fs);
		return 1;
	}
	return 0;
}
Ejemplo n.º 5
0
static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
{
	ext2_filsys fs = ctx->fs;
	struct ext2_inode	inode;
	struct problem_context	pctx;
	__u32			count;

	e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
	e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
	clear_problem_context(&pctx);
	pctx.ino = ino;

	e2fsck_read_bitmaps(ctx);
	ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));

	if (inode.i_file_acl &&
	    (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) {
		pctx.errcode = ext2fs_adjust_ea_refcount(fs, inode.i_file_acl,
						   block_buf, -1, &count);
		if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
			pctx.errcode = 0;
			count = 1;
		}
		if (pctx.errcode) {
			pctx.blk = inode.i_file_acl;
			fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			return;
		}
		if (count == 0) {
			ext2fs_unmark_block_bitmap(ctx->block_found_map,
						   inode.i_file_acl);
			ext2fs_block_alloc_stats(fs, inode.i_file_acl, -1);
		}
		inode.i_file_acl = 0;
	}

	if (!ext2fs_inode_has_valid_blocks(&inode))
		return;

	if (LINUX_S_ISREG(inode.i_mode) &&
	    (inode.i_size_high || inode.i_size & 0x80000000UL))
		ctx->large_files--;

	pctx.errcode = ext2fs_block_iterate2(fs, ino, 0, block_buf,
					    deallocate_inode_block, ctx);
	if (pctx.errcode) {
		fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}
}
Ejemplo n.º 6
0
static ext2_ino_t ext2CreateFile(ext2_vd *vd, ext2_inode_t * parent, int type, const char * name)
{
    errcode_t retval = -1;
    ext2_ino_t newfile = 0;
    ext2_ino_t existing;

    if(ext2fs_namei_follow(vd->fs, vd->root, parent->ino, name, &existing) == 0) {
		errno = EEXIST;
        return 0;
    }

	retval = ext2fs_new_inode(vd->fs, parent->ino, type, 0, &newfile);
	if (retval) {
		errno = EFAULT;
        return 0;
	}
    

    while((retval = ext2fs_link(vd->fs, parent->ino, name, newfile, EXT2_FT_REG_FILE)) == EXT2_ET_DIR_NO_SPACE)
    {
		if (ext2fs_expand_dir(vd->fs, parent->ino) != EXT2_ET_OK) {
			errno = EMLINK;
			return 0;
		}
    }


    if (retval != EXT2_ET_OK) {
		errno = EMLINK;
        return 0;
    }

	ext2fs_inode_alloc_stats2(vd->fs, newfile, +1, 0);

	struct ext2_inode inode;
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = type;
	inode.i_atime = inode.i_ctime = inode.i_mtime = time(0);
	inode.i_links_count = 1;
	inode.i_size = 0;
    inode.i_uid = parent->ni.i_uid;
    inode.i_gid = parent->ni.i_gid;

	if (ext2fs_write_new_inode(vd->fs, newfile, &inode) != 0)
        return 0;

    return newfile;
}
Ejemplo n.º 7
0
errcode_t quota_remove_inode(ext2_filsys fs, enum quota_type qtype)
{
	ext2_ino_t qf_ino;
	errcode_t	retval;

	retval = ext2fs_read_bitmaps(fs);
	if (retval) {
		log_debug("Couldn't read bitmaps: %s", error_message(retval));
		return retval;
	}

	qf_ino = *quota_sb_inump(fs->super, qtype);
	if (qf_ino == 0)
		return 0;
	retval = quota_inode_truncate(fs, qf_ino);
	if (retval)
		return retval;
	if (qf_ino >= EXT2_FIRST_INODE(fs->super)) {
		struct ext2_inode inode;

		retval = ext2fs_read_inode(fs, qf_ino, &inode);
		if (!retval) {
			memset(&inode, 0, sizeof(struct ext2_inode));
			ext2fs_write_inode(fs, qf_ino, &inode);
		}
		ext2fs_inode_alloc_stats2(fs, qf_ino, -1, 0);
		ext2fs_mark_ib_dirty(fs);

	}
	quota_set_sb_inum(fs, 0, qtype);

	ext2fs_mark_super_dirty(fs);
	fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
	retval = ext2fs_write_bitmaps(fs);
	if (retval) {
		log_debug("Couldn't write bitmaps: %s", error_message(retval));
		return retval;
	}
	return 0;
}
Ejemplo n.º 8
0
/*
 * This routine gets the lost_and_found inode, making it a directory
 * if necessary
 */
ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix)
{
	ext2_filsys fs = ctx->fs;
	ext2_ino_t			ino;
	blk64_t			blk;
	errcode_t		retval;
	struct ext2_inode	inode;
	char *			block;
	static const char	name[] = "lost+found";
	struct 	problem_context	pctx;

	if (ctx->lost_and_found)
		return ctx->lost_and_found;

	clear_problem_context(&pctx);

	retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name,
			       sizeof(name)-1, 0, &ino);
	if (retval && !fix)
		return 0;
	if (!retval) {
		if (ext2fs_check_directory(fs, ino) == 0) {
			ctx->lost_and_found = ino;
			return ino;
		}

		/* Lost+found isn't a directory! */
		if (!fix)
			return 0;
		pctx.ino = ino;
		if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx))
			return 0;

		/* OK, unlink the old /lost+found file. */
		pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0);
		if (pctx.errcode) {
			pctx.str = "ext2fs_unlink";
			fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
			return 0;
		}
		(void) e2fsck_dir_info_set_parent(ctx, ino, 0);
		e2fsck_adjust_inode_count(ctx, ino, -1);
	} else if (retval != EXT2_ET_FILE_NOT_FOUND) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx);
	}
	if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0))
		return 0;

	/*
	 * Read the inode and block bitmaps in; we'll be messing with
	 * them.
	 */
	e2fsck_read_bitmaps(ctx);

	/*
	 * First, find a free block
	 */
	retval = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx);
		return 0;
	}
	ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
	ext2fs_block_alloc_stats2(fs, blk, +1);

	/*
	 * Next find a free inode.
	 */
	retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700,
				  ctx->inode_used_map, &ino);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx);
		return 0;
	}
	ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
	ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

	/*
	 * Now let's create the actual data block for the inode
	 */
	retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx);
		return 0;
	}

	retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
	ext2fs_free_mem(&block);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx);
		return 0;
	}

	/*
	 * Set up the inode structure
	 */
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = 040700;
	inode.i_size = fs->blocksize;
	inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now;
	inode.i_links_count = 2;
	ext2fs_iblk_set(fs, &inode, 1);
	inode.i_block[0] = blk;

	/*
	 * Next, write out the inode.
	 */
	pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode);
	if (pctx.errcode) {
		pctx.str = "ext2fs_write_inode";
		fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
		return 0;
	}
	/*
	 * Finally, create the directory link
	 */
	pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR);
	if (pctx.errcode) {
		pctx.str = "ext2fs_link";
		fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
		return 0;
	}

	/*
	 * Miscellaneous bookkeeping that needs to be kept straight.
	 */
	e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO);
	e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1);
	ext2fs_icount_store(ctx->inode_count, ino, 2);
	ext2fs_icount_store(ctx->inode_link_info, ino, 2);
	ctx->lost_and_found = ino;
	quota_data_add(ctx->qctx, &inode, ino, fs->blocksize);
	quota_data_inodes(ctx->qctx, &inode, ino, +1);
#if 0
	printf("/lost+found created; inode #%lu\n", ino);
#endif
	return ino;
}
Ejemplo n.º 9
0
/* Copy the native file to the fs */
errcode_t do_write_internal(ext2_filsys fs, ext2_ino_t cwd, const char *src,
			    const char *dest, ext2_ino_t root)
{
	int		fd;
	struct stat	statbuf;
	ext2_ino_t	newfile;
	errcode_t	retval;
	struct ext2_inode inode;
	int		bufsize = IO_BUFSIZE;
	int		make_holes = 0;

	fd = ext2fs_open_file(src, O_RDONLY, 0);
	if (fd < 0) {
		com_err(src, errno, 0);
		return errno;
	}
	if (fstat(fd, &statbuf) < 0) {
		com_err(src, errno, 0);
		close(fd);
		return errno;
	}

	retval = ext2fs_namei(fs, root, cwd, dest, &newfile);
	if (retval == 0) {
		close(fd);
		return EXT2_ET_FILE_EXISTS;
	}

	retval = ext2fs_new_inode(fs, cwd, 010755, 0, &newfile);
	if (retval) {
		com_err(__func__, retval, 0);
		close(fd);
		return retval;
	}
#ifdef DEBUGFS
	printf("Allocated inode: %u\n", newfile);
#endif
	retval = ext2fs_link(fs, cwd, dest, newfile,
				EXT2_FT_REG_FILE);
	if (retval == EXT2_ET_DIR_NO_SPACE) {
		retval = ext2fs_expand_dir(fs, cwd);
		if (retval) {
			com_err(__func__, retval, "while expanding directory");
			close(fd);
			return retval;
		}
		retval = ext2fs_link(fs, cwd, dest, newfile,
					EXT2_FT_REG_FILE);
	}
	if (retval) {
		com_err(dest, retval, 0);
		close(fd);
		return errno;
	}
	if (ext2fs_test_inode_bitmap2(fs->inode_map, newfile))
		com_err(__func__, 0, "Warning: inode already set");
	ext2fs_inode_alloc_stats2(fs, newfile, +1, 0);
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = (statbuf.st_mode & ~LINUX_S_IFMT) | LINUX_S_IFREG;
	inode.i_atime = inode.i_ctime = inode.i_mtime =
		fs->now ? fs->now : time(0);
	inode.i_links_count = 1;
	retval = ext2fs_inode_size_set(fs, &inode, statbuf.st_size);
	if (retval) {
		com_err(dest, retval, 0);
		close(fd);
		return retval;
	}
	if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
				      EXT4_FEATURE_INCOMPAT_INLINE_DATA)) {
		inode.i_flags |= EXT4_INLINE_DATA_FL;
	} else if (fs->super->s_feature_incompat &
		   EXT3_FEATURE_INCOMPAT_EXTENTS) {
		int i;
		struct ext3_extent_header *eh;

		eh = (struct ext3_extent_header *) &inode.i_block[0];
		eh->eh_depth = 0;
		eh->eh_entries = 0;
		eh->eh_magic = ext2fs_cpu_to_le16(EXT3_EXT_MAGIC);
		i = (sizeof(inode.i_block) - sizeof(*eh)) /
			sizeof(struct ext3_extent);
		eh->eh_max = ext2fs_cpu_to_le16(i);
		inode.i_flags |= EXT4_EXTENTS_FL;
	}

	retval = ext2fs_write_new_inode(fs, newfile, &inode);
	if (retval) {
		com_err(__func__, retval, "while creating inode %u", newfile);
		close(fd);
		return retval;
	}
	if (inode.i_flags & EXT4_INLINE_DATA_FL) {
		retval = ext2fs_inline_data_init(fs, newfile);
		if (retval) {
			com_err("copy_file", retval, 0);
			close(fd);
			return retval;
		}
	}
	if (LINUX_S_ISREG(inode.i_mode)) {
		if (statbuf.st_blocks < statbuf.st_size / S_BLKSIZE) {
			make_holes = 1;
			/*
			 * Use I/O blocksize as buffer size when
			 * copying sparse files.
			 */
			bufsize = statbuf.st_blksize;
		}
		retval = copy_file(fs, fd, newfile, bufsize, make_holes);
		if (retval)
			com_err("copy_file", retval, 0);
	}
	close(fd);

	return retval;
}
Ejemplo n.º 10
0
errcode_t ext2fs_symlink(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t ino,
			 const char *name, char *target)
{
	ext2_extent_handle_t	handle;
	errcode_t		retval;
	struct ext2_inode	inode;
	ext2_ino_t		scratch_ino;
	blk64_t			blk;
	int			fastlink;
	unsigned int		target_len;
	char			*block_buf = 0;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	/* The Linux kernel doesn't allow for links longer than a block */
	target_len = strlen(target);
	if (target_len > fs->blocksize) {
		retval = EXT2_ET_INVALID_ARGUMENT;
		goto cleanup;
	}

	/*
	 * Allocate a data block for slow links
	 */
	fastlink = (target_len < sizeof(inode.i_block));
	if (!fastlink) {
		retval = ext2fs_new_block2(fs, 0, 0, &blk);
		if (retval)
			goto cleanup;
		retval = ext2fs_get_mem(fs->blocksize, &block_buf);
		if (retval)
			goto cleanup;
	}

	/*
	 * Allocate an inode, if necessary
	 */
	if (!ino) {
		retval = ext2fs_new_inode(fs, parent, LINUX_S_IFLNK | 0755,
					  0, &ino);
		if (retval)
			goto cleanup;
	}

	/*
	 * Create the inode structure....
	 */
	memset(&inode, 0, sizeof(struct ext2_inode));
	inode.i_mode = LINUX_S_IFLNK | 0777;
	inode.i_uid = inode.i_gid = 0;
	ext2fs_iblk_set(fs, &inode, fastlink ? 0 : 1);
	inode.i_links_count = 1;
	inode.i_size = target_len;
	/* The time fields are set by ext2fs_write_new_inode() */

	if (fastlink) {
		/* Fast symlinks, target stored in inode */
		strcpy((char *)&inode.i_block, target);
	} else {
		/* Slow symlinks, target stored in the first block */
		memset(block_buf, 0, fs->blocksize);
		strcpy(block_buf, target);
		if (fs->super->s_feature_incompat &
		    EXT3_FEATURE_INCOMPAT_EXTENTS) {
			/*
			 * The extent bmap is setup after the inode and block
			 * have been written out below.
			 */
			inode.i_flags |= EXT4_EXTENTS_FL;
		}
	}

	/*
	 * Write out the inode and inode data block.  The inode generation
	 * number is assigned by write_new_inode, which means that the
	 * operations using ino must come after it.
	 */
	retval = ext2fs_write_new_inode(fs, ino, &inode);
	if (retval)
		goto cleanup;

	if (!fastlink) {
		retval = ext2fs_bmap2(fs, ino, &inode, NULL, BMAP_SET, 0, NULL,
				      &blk);
		if (retval)
			goto cleanup;

		retval = io_channel_write_blk64(fs->io, blk, 1, block_buf);
		if (retval)
			goto cleanup;
	}

	/*
	 * Link the symlink into the filesystem hierarchy
	 */
	if (name) {
		retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
				       &scratch_ino);
		if (!retval) {
			retval = EXT2_ET_FILE_EXISTS;
			goto cleanup;
		}
		if (retval != EXT2_ET_FILE_NOT_FOUND)
			goto cleanup;
		retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_SYMLINK);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update accounting....
	 */
	if (!fastlink)
		ext2fs_block_alloc_stats2(fs, blk, +1);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 0);

cleanup:
	if (block_buf)
		ext2fs_free_mem(&block_buf);
	return retval;
}
Ejemplo n.º 11
0
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
		       const char *name)
{
	ext2_extent_handle_t	handle;
	errcode_t		retval;
	struct ext2_inode	parent_inode, inode;
	ext2_ino_t		ino = inum;
	ext2_ino_t		scratch_ino;
	blk64_t			blk;
	char			*block = 0;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	/*
	 * Allocate an inode, if necessary
	 */
	if (!ino) {
		retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
					  0, &ino);
		if (retval)
			goto cleanup;
	}

	/*
	 * Allocate a data block for the directory
	 */
	retval = ext2fs_new_block2(fs, 0, 0, &blk);
	if (retval)
		goto cleanup;

	/*
	 * Create a scratch template for the directory
	 */
	retval = ext2fs_new_dir_block(fs, ino, parent, &block);
	if (retval)
		goto cleanup;

	/*
	 * Get the parent's inode, if necessary
	 */
	if (parent != ino) {
		retval = ext2fs_read_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	} else
		memset(&parent_inode, 0, sizeof(parent_inode));

	/*
	 * Create the inode structure....
	 */
	memset(&inode, 0, sizeof(struct ext2_inode));
	inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
	inode.i_uid = inode.i_gid = 0;
	ext2fs_iblk_set(fs, &inode, 1);
	if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS)
		inode.i_flags |= EXT4_EXTENTS_FL;
	else
		inode.i_block[0] = blk;
	inode.i_links_count = 2;
	inode.i_size = fs->blocksize;

	/*
	 * Write out the inode and inode data block
	 */
	retval = ext2fs_write_dir_block(fs, blk, block);
	if (retval)
		goto cleanup;
	retval = ext2fs_write_new_inode(fs, ino, &inode);
	if (retval)
		goto cleanup;

	if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
		retval = ext2fs_extent_open2(fs, ino, &inode, &handle);
		if (retval)
			goto cleanup;
		retval = ext2fs_extent_set_bmap(handle, 0, blk, 0);
		ext2fs_extent_free(handle);
		if (retval)
			goto cleanup;
	}

	/*
	 * Link the directory into the filesystem hierarchy
	 */
	if (name) {
		retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
				       &scratch_ino);
		if (!retval) {
			retval = EXT2_ET_DIR_EXISTS;
			name = 0;
			goto cleanup;
		}
		if (retval != EXT2_ET_FILE_NOT_FOUND)
			goto cleanup;
		retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update parent inode's counts
	 */
	if (parent != ino) {
		parent_inode.i_links_count++;
		retval = ext2fs_write_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update accounting....
	 */
	ext2fs_block_alloc_stats2(fs, blk, +1);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

cleanup:
	if (block)
		ext2fs_free_mem(&block);
	return retval;

}
Ejemplo n.º 12
0
static errcode_t mk_hugefile(ext2_filsys fs, blk64_t num,
			     ext2_ino_t dir, unsigned long idx, ext2_ino_t *ino)

{
	errcode_t		retval;
	blk64_t			lblk, bend = 0;
	__u64			size;
	blk64_t			left;
	blk64_t			count = 0;
	struct ext2_inode	inode;
	ext2_extent_handle_t	handle;

	retval = ext2fs_new_inode(fs, 0, LINUX_S_IFREG, NULL, ino);
	if (retval)
		return retval;

	memset(&inode, 0, sizeof(struct ext2_inode));
	inode.i_mode = LINUX_S_IFREG | (0666 & ~fs->umask);
	inode.i_links_count = 1;
	inode.i_uid = uid & 0xFFFF;
	ext2fs_set_i_uid_high(inode, (uid >> 16) & 0xffff);
	inode.i_gid = gid & 0xFFFF;
	ext2fs_set_i_gid_high(inode, (gid >> 16) & 0xffff);

	retval = ext2fs_write_new_inode(fs, *ino, &inode);
	if (retval)
		return retval;

	ext2fs_inode_alloc_stats2(fs, *ino, +1, 0);

	retval = ext2fs_extent_open2(fs, *ino, &inode, &handle);
	if (retval)
		return retval;

	/*
	 * We don't use ext2fs_fallocate() here because hugefiles are
	 * designed to be physically contiguous (if the block group
	 * descriptors are configured to be in a single block at the
	 * beginning of the file system, by using the
	 * packed_meta_blocks layout), with the extent tree blocks
	 * allocated near the beginning of the file system.
	 */
	lblk = 0;
	left = num ? num : 1;
	while (left) {
		blk64_t pblk, end;
		blk64_t n = left;

		retval =  ext2fs_find_first_zero_block_bitmap2(fs->block_map,
			goal, ext2fs_blocks_count(fs->super) - 1, &end);
		if (retval)
			goto errout;
		goal = end;

		retval =  ext2fs_find_first_set_block_bitmap2(fs->block_map, goal,
			       ext2fs_blocks_count(fs->super) - 1, &bend);
		if (retval == ENOENT) {
			bend = ext2fs_blocks_count(fs->super);
			if (num == 0)
				left = 0;
		}
		if (!num || bend - goal < left)
			n = bend - goal;
		pblk = goal;
		if (num)
			left -= n;
		goal += n;
		count += n;
		ext2fs_block_alloc_stats_range(fs, pblk, n, +1);

		if (zero_hugefile) {
			blk64_t ret_blk;
			retval = ext2fs_zero_blocks2(fs, pblk, n,
						     &ret_blk, NULL);

			if (retval)
				com_err(program_name, retval,
					_("while zeroing block %llu "
					  "for hugefile"), ret_blk);
		}

		while (n) {
			blk64_t l = n;
			struct ext2fs_extent newextent;

			if (l > EXT_INIT_MAX_LEN)
				l = EXT_INIT_MAX_LEN;

			newextent.e_len = l;
			newextent.e_pblk = pblk;
			newextent.e_lblk = lblk;
			newextent.e_flags = 0;

			retval = ext2fs_extent_insert(handle,
					EXT2_EXTENT_INSERT_AFTER, &newextent);
			if (retval)
				return retval;
			pblk += l;
			lblk += l;
			n -= l;
		}
	}

	retval = ext2fs_read_inode(fs, *ino, &inode);
	if (retval)
		goto errout;

	retval = ext2fs_iblk_add_blocks(fs, &inode,
					count / EXT2FS_CLUSTER_RATIO(fs));
	if (retval)
		goto errout;
	size = (__u64) count * fs->blocksize;
	retval = ext2fs_inode_size_set(fs, &inode, size);
	if (retval)
		goto errout;

	retval = ext2fs_write_new_inode(fs, *ino, &inode);
	if (retval)
		goto errout;

	if (idx_digits)
		sprintf(fn_numbuf, "%0*lu", idx_digits, idx);
	else if (num_files > 1)
		sprintf(fn_numbuf, "%lu", idx);

retry:
	retval = ext2fs_link(fs, dir, fn_buf, *ino, EXT2_FT_REG_FILE);
	if (retval == EXT2_ET_DIR_NO_SPACE) {
		retval = ext2fs_expand_dir(fs, dir);
		if (retval)
			goto errout;
		goto retry;
	}

	if (retval)
		goto errout;

errout:
	if (handle)
		ext2fs_extent_free(handle);

	return retval;
}
Ejemplo n.º 13
0
int do_create (ext2_filsys e2fs, const char *path, mode_t mode, dev_t dev, const char *fastsymlink)
{
	int rt;
	time_t tm;
	errcode_t rc;

	char *p_path;
	char *r_path;

	ext2_ino_t ino;
	struct ext2_inode inode;
	ext2_ino_t n_ino;

	struct fuse_context *ctx;

	debugf("enter");
	debugf("path = %s, mode: 0%o", path, mode);

	rt=do_check_split(path, &p_path, &r_path);

	debugf("parent: %s, child: %s", p_path, r_path);

	rt = do_readinode(e2fs, p_path, &ino, &inode);
	if (rt) {
		debugf("do_readinode(%s, &ino, &inode); failed", p_path);
		free_split(p_path, r_path);
		return rt;
	}

	rc = ext2fs_new_inode(e2fs, ino, mode, 0, &n_ino);
	if (rc) {
		debugf("ext2fs_new_inode(ep.fs, ino, mode, 0, &n_ino); failed");
		return -ENOMEM;
	}

	do {
		debugf("calling ext2fs_link(e2fs, %d, %s, %d, %d);", ino, r_path, n_ino, do_modetoext2lag(mode));
		rc = ext2fs_link(e2fs, ino, r_path, n_ino, do_modetoext2lag(mode));
		if (rc == EXT2_ET_DIR_NO_SPACE) {
			debugf("calling ext2fs_expand_dir(e2fs, &d)", ino);
			if (ext2fs_expand_dir(e2fs, ino)) {
				debugf("error while expanding directory %s (%d)", p_path, ino);
				free_split(p_path, r_path);
				return -ENOSPC;
			}
		}
	} while (rc == EXT2_ET_DIR_NO_SPACE);
	if (rc) {
		debugf("ext2fs_link(e2fs, %d, %s, %d, %d); failed", ino, r_path, n_ino, do_modetoext2lag(mode));
		free_split(p_path, r_path);
		return -EIO;
	}

	if (ext2fs_test_inode_bitmap(e2fs->inode_map, n_ino)) {
		debugf("inode already set");
	}

	ext2fs_inode_alloc_stats2(e2fs, n_ino, +1, 0);
	memset(&inode, 0, sizeof(inode));
	tm = e2fs->now ? e2fs->now : time(NULL);
	inode.i_mode = mode;
	inode.i_atime = inode.i_ctime = inode.i_mtime = tm;
	inode.i_links_count = 1;
	inode.i_size = 0;
	ctx = fuse_get_context();
	if (ctx) {
		inode.i_uid = ctx->uid;
		inode.i_gid = ctx->gid;
	}

	if (S_ISCHR(mode) || S_ISBLK(mode)) {
		if (old_valid_dev(dev))
			inode.i_block[0]= ext2fs_cpu_to_le32(old_encode_dev(dev));
		else
			inode.i_block[1]= ext2fs_cpu_to_le32(new_encode_dev(dev));
	}

	if (S_ISLNK(mode) && fastsymlink != NULL) {
		inode.i_size = strlen(fastsymlink);
		strncpy((char *)&(inode.i_block[0]),fastsymlink,
				(EXT2_N_BLOCKS * sizeof(inode.i_block[0])));
	}

	rc = ext2fs_write_new_inode(e2fs, n_ino, &inode);
	if (rc) {
		debugf("ext2fs_write_new_inode(e2fs, n_ino, &inode);");
		free_split(p_path, r_path);
		return -EIO;
	}

	/* update parent dir */
	rt = do_readinode(e2fs, p_path, &ino, &inode);
	if (rt) {
		debugf("do_readinode(%s, &ino, &inode); dailed", p_path);
		free_split(p_path, r_path);
		return -EIO;
	}
	inode.i_ctime = inode.i_mtime = tm;
	rc = ext2fs_write_inode(e2fs, ino, &inode);
	if (rc) {
		debugf("ext2fs_write_inode(e2fs, ino, &inode); failed");
		free_split(p_path, r_path);
		return -EIO;
	}

	free_split(p_path, r_path);

	debugf("leave");
	return 0;
}
Ejemplo n.º 14
0
/* Make a special files (block and character devices), fifo's, and sockets  */
errcode_t do_mknod_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
			    struct stat *st)
{
	ext2_ino_t		ino;
	errcode_t		retval;
	struct ext2_inode	inode;
	unsigned long		devmajor, devminor, mode;
	int			filetype;

	switch(st->st_mode & S_IFMT) {
	case S_IFCHR:
		mode = LINUX_S_IFCHR;
		filetype = EXT2_FT_CHRDEV;
		break;
	case S_IFBLK:
		mode = LINUX_S_IFBLK;
		filetype =  EXT2_FT_BLKDEV;
		break;
	case S_IFIFO:
		mode = LINUX_S_IFIFO;
		filetype = EXT2_FT_FIFO;
		break;
	case S_IFSOCK:
		mode = LINUX_S_IFSOCK;
		filetype = EXT2_FT_SOCK;
		break;
	default:
		return EXT2_ET_INVALID_ARGUMENT;
	}

	if (!(fs->flags & EXT2_FLAG_RW)) {
		com_err(__func__, 0, "Filesystem opened read/only");
		return EROFS;
	}
	retval = ext2fs_new_inode(fs, cwd, 010755, 0, &ino);
	if (retval) {
		com_err(__func__, retval, 0);
		return retval;
	}

#ifdef DEBUGFS
	printf("Allocated inode: %u\n", ino);
#endif
	retval = ext2fs_link(fs, cwd, name, ino, filetype);
	if (retval == EXT2_ET_DIR_NO_SPACE) {
		retval = ext2fs_expand_dir(fs, cwd);
		if (retval) {
			com_err(__func__, retval, "while expanding directory");
			return retval;
		}
		retval = ext2fs_link(fs, cwd, name, ino, filetype);
	}
	if (retval) {
		com_err(name, retval, 0);
		return retval;
	}
	if (ext2fs_test_inode_bitmap2(fs->inode_map, ino))
		com_err(__func__, 0, "Warning: inode already set");
	ext2fs_inode_alloc_stats2(fs, ino, +1, 0);
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = mode;
	inode.i_atime = inode.i_ctime = inode.i_mtime =
		fs->now ? fs->now : time(0);

	if (filetype != S_IFIFO) {
		devmajor = major(st->st_rdev);
		devminor = minor(st->st_rdev);

		if ((devmajor < 256) && (devminor < 256)) {
			inode.i_block[0] = devmajor * 256 + devminor;
			inode.i_block[1] = 0;
		} else {
			inode.i_block[0] = 0;
			inode.i_block[1] = (devminor & 0xff) | (devmajor << 8) |
					   ((devminor & ~0xff) << 12);
		}
	}
	inode.i_links_count = 1;

	retval = ext2fs_write_new_inode(fs, ino, &inode);
	if (retval)
		com_err(__func__, retval, "while creating inode %u", ino);

	return retval;
}
Ejemplo n.º 15
0
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
		       const char *name)
{
	errcode_t		retval;
	struct ext2_inode	parent_inode, inode;
	ext2_ino_t		ino = inum;
	ext2_ino_t		scratch_ino;
	blk_t			blk;
	char			*block = 0;
	char 			*ext2bp_block = 0;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	/*
	 * Allocate an inode, if necessary
	 */
	if (!ino) {
		retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
					  0, &ino);
		if (retval)
			goto cleanup;
	}


	/*
	 * Allocate a data block for the directory
	 */
	retval = ext2fs_new_block(fs, 0, 0, &blk);
	printf("Using block %lu for the dir\n", blk);
	if (retval)
		goto cleanup;


	printf("Writing the dir info into the buffer\n");
	/*
	 * Create a scratch template for the directory
	 */
	/* Vijay: Offset the block address by the backpointer information */
	retval = ext2fs_new_dir_block(fs, ino, parent, &block);
	//ext2bp_block = block + EXT2BP_HEADER_SIZE;
	//retval = ext2fs_new_dir_block(fs, ino, parent, &ext2bp_block);
	if (retval)
		goto cleanup;

	/*
	 * Get the parent's inode, if necessary
	 */
	if (parent != ino) {
		retval = ext2fs_read_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	} else
		memset(&parent_inode, 0, sizeof(parent_inode));

	/*
	 * Create the inode structure....
	 */
	memset(&inode, 0, sizeof(struct ext2_inode));
	inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
	inode.i_uid = inode.i_gid = 0;
	ext2fs_iblk_set(fs, &inode, 1);
	inode.i_block[0] = blk;
	inode.i_links_count = 2;
	inode.i_size = fs->blocksize;

	/* Vijay: Adding backlink to the inode - Modifying position 0
	 * since this is a new inode - It will not have any other links
	 * pointing to it. First, we need to reset all the backlinks.
	 */
	printf("Vijay: Adding the backlink to %s\n", name);

	int i;
	for(i=0; i < EXT2_N_LINKS; i++)
		inode.i_backlinks[i] = 0;
	inode.i_backlinks[0] = parent;

	printf("Going to write the dir block\n");
	/*
	 * Write out the inode and inode data block
	 */
	retval = ext2fs_write_dir_block(fs, blk, block);
	if (retval)
		goto cleanup;
	retval = ext2fs_write_new_inode(fs, ino, &inode);
	if (retval)
		goto cleanup;


	printf("Link the directory into the filesystem hierarchy\n");
	/*
	 * Link the directory into the filesystem hierarchy
	 */
	if (name) {
		retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
				       &scratch_ino);
		if (!retval) {
			retval = EXT2_ET_DIR_EXISTS;
			name = 0;
			goto cleanup;
		}
		if (retval != EXT2_ET_FILE_NOT_FOUND)
			goto cleanup;
		retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
		printf("Linking done: %lu\n", retval);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update parent inode's counts
	 */
	if (parent != ino) {
		parent_inode.i_links_count++;
		retval = ext2fs_write_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update accounting....
	 */
	ext2fs_block_alloc_stats(fs, blk, +1);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

cleanup:
	if (block)
		ext2fs_free_mem(&block);
	return retval;

}
Ejemplo n.º 16
0
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
		       const char *name)
{
	errcode_t		retval;
	struct ext2_inode	parent_inode, inode;
	ext2_ino_t		ino = inum;
	ext2_ino_t		scratch_ino;
	blk_t			blk;
	char			*block = 0;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	/*
	 * Allocate an inode, if necessary
	 */
	if (!ino) {
		retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
					  0, &ino);
		if (retval)
			goto cleanup;
	}

	/*
	 * Allocate a data block for the directory
	 */
	retval = ext2fs_new_block(fs, 0, 0, &blk);
	if (retval)
		goto cleanup;

	/*
	 * Create a scratch template for the directory
	 */
	retval = ext2fs_new_dir_block(fs, ino, parent, &block);
	if (retval)
		goto cleanup;

	/*
	 * Get the parent's inode, if necessary
	 */
	if (parent != ino) {
		retval = ext2fs_read_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	} else
		memset(&parent_inode, 0, sizeof(parent_inode));

	/*
	 * Create the inode structure....
	 */
	memset(&inode, 0, sizeof(struct ext2_inode));
	inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
	inode.i_uid = inode.i_gid = 0;
	inode.i_blocks = fs->blocksize / 512;
	inode.i_block[0] = blk;
	inode.i_links_count = 2;
	inode.i_ctime = inode.i_atime = inode.i_mtime = fs->now ? fs->now : time(NULL);
	inode.i_size = fs->blocksize;

	/*
	 * Write out the inode and inode data block
	 */
	retval = ext2fs_write_dir_block(fs, blk, block);
	if (retval)
		goto cleanup;
	retval = ext2fs_write_new_inode(fs, ino, &inode); 
	if (retval)
		goto cleanup;

	/*
	 * Link the directory into the filesystem hierarchy
	 */
	if (name) {
		retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
				       &scratch_ino);
		if (!retval) {
			retval = EXT2_ET_DIR_EXISTS;
			name = 0;
			goto cleanup;
		}
		if (retval != EXT2_ET_FILE_NOT_FOUND)
			goto cleanup;
		retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update parent inode's counts
	 */
	if (parent != ino) {
		parent_inode.i_links_count++;
		retval = ext2fs_write_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	}
	
	/*
	 * Update accounting....
	 */
	ext2fs_block_alloc_stats(fs, blk, +1);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

cleanup:
	if (block)
		ext2fs_free_mem(&block);
	return retval;

}
Ejemplo n.º 17
0
static ext2_ino_t ext2CreateSymlink(ext2_vd *vd, const char *path, const char * targetdir, const char * name, mode_t type)
{
    ext2_inode_t *target_ni = NULL;
    ext2_ino_t newentry = 0;
    ext2_ino_t ino = 0;

    // Check if it does exist
    target_ni = ext2OpenEntry(vd, targetdir);
    if (!target_ni)
        goto cleanup;

    int err = ext2fs_new_inode(vd->fs, target_ni->ino, type, 0, &ino);
    if (err) {
		errno = EFAULT;
        goto cleanup;
    }

    while((err = ext2fs_link(vd->fs, target_ni->ino, name, ino, EXT2_FT_SYMLINK)) == EXT2_ET_DIR_NO_SPACE)
    {
		if (ext2fs_expand_dir(vd->fs, target_ni->ino) != EXT2_ET_OK) {
			errno = EMLINK;
			goto cleanup;
		}
    }

    if(err != EXT2_ET_OK) {
		errno = EMLINK;
        return 0;
    }

    ext2fs_inode_alloc_stats2(vd->fs, ino, +1, 0);

    struct ext2_inode inode;
    memset(&inode, 0, sizeof(inode));
    inode.i_mode = type;
    inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
    inode.i_links_count = 1;
    inode.i_size = strlen(path); //initial size of file
    inode.i_uid = target_ni->ni.i_uid;
    inode.i_gid = target_ni->ni.i_gid;

    if (strlen(path) <= sizeof(inode.i_block))
    {
        /* fast symlink */
        strncpy((char *)&(inode.i_block[0]),path,sizeof(inode.i_blocks));
    }
    else
    {
        /* slow symlink */
        char * buffer = mem_alloc(vd->fs->blocksize);
        if (buffer)
        {
            blk_t blk;
            strncpy(buffer, path, vd->fs->blocksize);
            err = ext2fs_new_block(vd->fs, 0, 0, &blk);
            if (!err)
            {
                inode.i_block[0] = blk;
                inode.i_blocks = vd->fs->blocksize / 512;
                vd->fs->io->manager->write_blk(vd->fs->io, blk, 1, buffer);
                ext2fs_block_alloc_stats(vd->fs, blk, +1);
            }
            mem_free(buffer);
        }
    }

    if(ext2fs_write_new_inode(vd->fs, ino, &inode) != 0)
        newentry = ino;

cleanup:

    if(target_ni)
        ext2CloseEntry(vd, target_ni);

    return newentry;
}
Ejemplo n.º 18
0
void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse)
{
	ext2fs_inode_alloc_stats2(fs, ino, inuse, 0);
}
Ejemplo n.º 19
0
/*
 * This routine gets the lost_and_found inode, making it a directory
 * if necessary
 */
ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix)
{
	ext2_filsys fs = ctx->fs;
	ext2_ino_t			ino;
	blk64_t			blk;
	errcode_t		retval;
	struct ext2_inode	inode;
	char *			block;
	static const char	name[] = "lost+found";
	struct 	problem_context	pctx;
	int			will_rehash, flags;

	if (ctx->lost_and_found)
		return ctx->lost_and_found;

	clear_problem_context(&pctx);

	will_rehash = e2fsck_dir_will_be_rehashed(ctx, EXT2_ROOT_INO);
	if (will_rehash) {
		flags = ctx->fs->flags;
		ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
	}
	retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name,
			       sizeof(name)-1, 0, &ino);
	if (will_rehash)
		ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
			(ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
	if (retval && !fix)
		return 0;
	if (!retval) {
		/* Lost+found shouldn't have inline data */
		retval = ext2fs_read_inode(fs, ino, &inode);
		if (fix && retval)
			return 0;

		if (fix && (inode.i_flags & EXT4_INLINE_DATA_FL)) {
			if (!fix_problem(ctx, PR_3_LPF_INLINE_DATA, &pctx))
				return 0;
			goto unlink;
		}

		if (fix && (inode.i_flags & EXT4_ENCRYPT_FL)) {
			if (!fix_problem(ctx, PR_3_LPF_ENCRYPTED, &pctx))
				return 0;
			goto unlink;
		}

		if (ext2fs_check_directory(fs, ino) == 0) {
			ctx->lost_and_found = ino;
			return ino;
		}

		/* Lost+found isn't a directory! */
		if (!fix)
			return 0;
		pctx.ino = ino;
		if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx))
			return 0;

unlink:
		/* OK, unlink the old /lost+found file. */
		pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0);
		if (pctx.errcode) {
			pctx.str = "ext2fs_unlink";
			fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
			return 0;
		}
		(void) e2fsck_dir_info_set_parent(ctx, ino, 0);
		e2fsck_adjust_inode_count(ctx, ino, -1);
		/*
		 * If the old lost+found was a directory, we've just
		 * disconnected it from the directory tree, which
		 * means we need to restart the directory tree scan.
		 * The simplest way to do this is restart the whole
		 * e2fsck operation.
		 */
		if (LINUX_S_ISDIR(inode.i_mode))
			ctx->flags |= E2F_FLAG_RESTART;
	} else if (retval != EXT2_ET_FILE_NOT_FOUND) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx);
	}
	if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0))
		return 0;

	/*
	 * Read the inode and block bitmaps in; we'll be messing with
	 * them.
	 */
	e2fsck_read_bitmaps(ctx);

	/*
	 * First, find a free block
	 */
	if (ctx->lnf_repair_block) {
		blk = ctx->lnf_repair_block;
		ctx->lnf_repair_block = 0;
		goto skip_new_block;
	}
	retval = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
	if (retval == EXT2_ET_BLOCK_ALLOC_FAIL &&
	    fix_problem(ctx, PR_3_LPF_NO_SPACE, &pctx)) {
		fix_problem(ctx, PR_3_NO_SPACE_TO_RECOVER, &pctx);
		ctx->lost_and_found = EXT2_ROOT_INO;
		return 0;
	}
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx);
		return 0;
	}
	ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
skip_new_block:
	ext2fs_block_alloc_stats2(fs, blk, +1);

	/*
	 * Next find a free inode.
	 */
	retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700,
				  ctx->inode_used_map, &ino);
	if (retval == EXT2_ET_INODE_ALLOC_FAIL &&
	    fix_problem(ctx, PR_3_LPF_NO_SPACE, &pctx)) {
		fix_problem(ctx, PR_3_NO_SPACE_TO_RECOVER, &pctx);
		ctx->lost_and_found = EXT2_ROOT_INO;
		return 0;
	}
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx);
		return 0;
	}
	ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
	ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

	/*
	 * Set up the inode structure
	 */
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = 040700;
	inode.i_size = fs->blocksize;
	inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now;
	inode.i_links_count = 2;
	ext2fs_iblk_set(fs, &inode, 1);
	inode.i_block[0] = blk;

	/*
	 * Next, write out the inode.
	 */
	pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode);
	if (pctx.errcode) {
		pctx.str = "ext2fs_write_inode";
		fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
		return 0;
	}

	/*
	 * Now let's create the actual data block for the inode.
	 * Due to metadata_csum, the directory block MUST be written
	 * after the inode is written to disk!
	 */
	retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx);
		return 0;
	}

	retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
	ext2fs_free_mem(&block);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx);
		return 0;
	}

	/*
	 * Finally, create the directory link
	 */
	pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR);
	if (pctx.errcode == EXT2_ET_DIR_NO_SPACE) {
		pctx.errcode = ext2fs_expand_dir(fs, EXT2_ROOT_INO);
		if (pctx.errcode)
			goto link_error;
		pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino,
					   EXT2_FT_DIR);
	}
	if (pctx.errcode) {
link_error:
		pctx.str = "ext2fs_link";
		fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
		return 0;
	}

	/*
	 * Miscellaneous bookkeeping that needs to be kept straight.
	 */
	e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO);
	e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1);
	ext2fs_icount_store(ctx->inode_count, ino, 2);
	ext2fs_icount_store(ctx->inode_link_info, ino, 2);
	ctx->lost_and_found = ino;
	quota_data_add(ctx->qctx, &inode, ino, fs->blocksize);
	quota_data_inodes(ctx->qctx, &inode, ino, +1);
#if 0
	printf("/lost+found created; inode #%lu\n", ino);
#endif
	return ino;
}