| /* vi: set sw=4 ts=4: */ |
| /* |
| * valid_blk.c --- does the inode have valid blocks? |
| * |
| * Copyright 1997 by Theodore Ts'o |
| * |
| * %Begin-Header% |
| * This file may be redistributed under the terms of the GNU Public |
| * License. |
| * %End-Header% |
| * |
| */ |
| |
| #include <stdio.h> |
| #if HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| #include <string.h> |
| #include <time.h> |
| |
| #include "ext2_fs.h" |
| #include "ext2fs.h" |
| |
| /* |
| * This function returns 1 if the inode's block entries actually |
| * contain block entries. |
| */ |
| int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode) |
| { |
| /* |
| * Only directories, regular files, and some symbolic links |
| * have valid block entries. |
| */ |
| if (!LINUX_S_ISDIR(inode->i_mode) && !LINUX_S_ISREG(inode->i_mode) && |
| !LINUX_S_ISLNK(inode->i_mode)) |
| return 0; |
| |
| /* |
| * If the symbolic link is a "fast symlink", then the symlink |
| * target is stored in the block entries. |
| */ |
| if (LINUX_S_ISLNK (inode->i_mode)) { |
| if (inode->i_file_acl == 0) { |
| /* With no EA block, we can rely on i_blocks */ |
| if (inode->i_blocks == 0) |
| return 0; |
| } else { |
| /* With an EA block, life gets more tricky */ |
| if (inode->i_size >= EXT2_N_BLOCKS*4) |
| return 1; /* definitely using i_block[] */ |
| if (inode->i_size > 4 && inode->i_block[1] == 0) |
| return 1; /* definitely using i_block[] */ |
| return 0; /* Probably a fast symlink */ |
| } |
| } |
| return 1; |
| } |
