Last change
on this file since 3228 was 1765, checked in by Bruno Cornec, 17 years ago |
Update to busybox 1.7.2
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-
Property svn:eol-style
set to
native
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File size:
1.3 KB
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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * valid_blk.c --- does the inode have valid blocks?
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4 | *
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5 | * Copyright 1997 by Theodore Ts'o
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6 | *
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7 | * %Begin-Header%
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8 | * This file may be redistributed under the terms of the GNU Public
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9 | * License.
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10 | * %End-Header%
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11 | *
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12 | */
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13 |
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14 | #include <stdio.h>
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15 | #if HAVE_UNISTD_H
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16 | #include <unistd.h>
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17 | #endif
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18 | #include <string.h>
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19 | #include <time.h>
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20 |
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21 | #include "ext2_fs.h"
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22 | #include "ext2fs.h"
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23 |
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24 | /*
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25 | * This function returns 1 if the inode's block entries actually
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26 | * contain block entries.
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27 | */
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28 | int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode)
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29 | {
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30 | /*
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31 | * Only directories, regular files, and some symbolic links
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32 | * have valid block entries.
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33 | */
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34 | if (!LINUX_S_ISDIR(inode->i_mode) && !LINUX_S_ISREG(inode->i_mode) &&
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35 | !LINUX_S_ISLNK(inode->i_mode))
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36 | return 0;
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37 |
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38 | /*
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39 | * If the symbolic link is a "fast symlink", then the symlink
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40 | * target is stored in the block entries.
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41 | */
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42 | if (LINUX_S_ISLNK (inode->i_mode)) {
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43 | if (inode->i_file_acl == 0) {
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44 | /* With no EA block, we can rely on i_blocks */
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45 | if (inode->i_blocks == 0)
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46 | return 0;
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47 | } else {
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48 | /* With an EA block, life gets more tricky */
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49 | if (inode->i_size >= EXT2_N_BLOCKS*4)
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50 | return 1; /* definitely using i_block[] */
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51 | if (inode->i_size > 4 && inode->i_block[1] == 0)
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52 | return 1; /* definitely using i_block[] */
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53 | return 0; /* Probably a fast symlink */
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54 | }
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55 | }
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56 | return 1;
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57 | }
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