/*
* namei.c --- ext2fs directory lookup operations
- *
+ *
* Copyright (C) 1993, 1994, 1994, 1995 Theodore Ts'o.
*
* %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
* %End-Header%
*/
+#include "config.h"
#include <stdio.h>
#include <string.h>
#if HAVE_UNISTD_H
/* #define NAMEI_DEBUG */
-#include <linux/ext2_fs.h>
-
+#include "ext2_fs.h"
#include "ext2fs.h"
+#include "ext2fsP.h"
-static errcode_t open_namei(ext2_filsys fs, ino_t root, ino_t base,
+static errcode_t open_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t base,
const char *pathname, size_t pathlen, int follow,
- int link_count, char *buf, ino_t *res_inode);
+ int link_count, char *buf, ext2_ino_t *res_inode);
-static errcode_t follow_link(ext2_filsys fs, ino_t root, ino_t dir,
- ino_t inode, int link_count,
- char *buf, ino_t *res_inode)
+static errcode_t follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t dir,
+ ext2_ino_t inode, int link_count,
+ char *buf, ext2_ino_t *res_inode)
{
char *pathname;
char *buffer = 0;
errcode_t retval;
struct ext2_inode ei;
+ blk64_t blk;
#ifdef NAMEI_DEBUG
printf("follow_link: root=%lu, dir=%lu, inode=%lu, lc=%d\n",
root, dir, inode, link_count);
-
+
#endif
retval = ext2fs_read_inode (fs, inode, &ei);
if (retval) return retval;
*res_inode = inode;
return 0;
}
- if (link_count++ > 5) {
+ if (link_count++ >= EXT2FS_MAX_NESTED_LINKS)
return EXT2_ET_SYMLINK_LOOP;
- }
- if (ei.i_blocks) {
- retval = ext2fs_get_mem(fs->blocksize, (void **) &buffer);
+
+ if (ext2fs_is_fast_symlink(&ei))
+ pathname = (char *)&(ei.i_block[0]);
+ else if (ei.i_flags & EXT4_INLINE_DATA_FL) {
+ retval = ext2fs_get_memzero(ei.i_size, &buffer);
if (retval)
return retval;
- retval = io_channel_read_blk(fs->io, ei.i_block[0], 1, buffer);
+
+ retval = ext2fs_inline_data_get(fs, inode,
+ &ei, buffer, NULL);
if (retval) {
- ext2fs_free_mem((void **) &buffer);
+ ext2fs_free_mem(&buffer);
return retval;
}
pathname = buffer;
- } else
- pathname = (char *)&(ei.i_block[0]);
+ } else {
+ retval = ext2fs_bmap2(fs, inode, &ei, NULL, 0, 0, NULL, &blk);
+ if (retval)
+ return retval;
+
+ retval = ext2fs_get_mem(fs->blocksize, &buffer);
+ if (retval)
+ return retval;
+
+ retval = io_channel_read_blk64(fs->io, blk, 1, buffer);
+ if (retval) {
+ ext2fs_free_mem(&buffer);
+ return retval;
+ }
+ pathname = buffer;
+ }
+
retval = open_namei(fs, root, dir, pathname, ei.i_size, 1,
link_count, buf, res_inode);
if (buffer)
- ext2fs_free_mem((void **) &buffer);
+ ext2fs_free_mem(&buffer);
return retval;
}
* containing directory, and a pointer to the filename of the file
* (pointing into the pathname) and the length of the filename.
*/
-static errcode_t dir_namei(ext2_filsys fs, ino_t root, ino_t dir,
+static errcode_t dir_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t dir,
const char *pathname, int pathlen,
int link_count, char *buf,
- const char **name, int *namelen, ino_t *res_inode)
+ const char **name, int *namelen,
+ ext2_ino_t *res_inode)
{
char c;
const char *thisname;
int len;
- ino_t inode;
+ ext2_ino_t inode;
errcode_t retval;
if ((c = *pathname) == '/') {
return 0;
}
-static errcode_t open_namei(ext2_filsys fs, ino_t root, ino_t base,
+static errcode_t open_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t base,
const char *pathname, size_t pathlen, int follow,
- int link_count, char *buf, ino_t *res_inode)
+ int link_count, char *buf, ext2_ino_t *res_inode)
{
- const char *basename;
+ const char *base_name;
int namelen;
- ino_t dir, inode;
+ ext2_ino_t dir, inode;
errcode_t retval;
#ifdef NAMEI_DEBUG
- printf("open_namei: root=%lu, dir=%lu, path=%*s, lc=%d\n",
+ printf("open_namei: root=%lu, dir=%lu, path=%.*s, lc=%d\n",
root, base, pathlen, pathname, link_count);
#endif
retval = dir_namei(fs, root, base, pathname, pathlen,
- link_count, buf, &basename, &namelen, &dir);
+ link_count, buf, &base_name, &namelen, &dir);
if (retval) return retval;
if (!namelen) { /* special case: '/usr/' etc */
*res_inode=dir;
return 0;
}
- retval = ext2fs_lookup (fs, dir, basename, namelen, buf, &inode);
+ retval = ext2fs_lookup (fs, dir, base_name, namelen, buf, &inode);
if (retval)
return retval;
if (follow) {
return 0;
}
-errcode_t ext2fs_namei(ext2_filsys fs, ino_t root, ino_t cwd,
- const char *name, ino_t *inode)
+errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
+ const char *name, ext2_ino_t *inode)
{
char *buf;
errcode_t retval;
-
+
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
- retval = ext2fs_get_mem(fs->blocksize, (void **) &buf);
+ retval = ext2fs_get_mem(fs->blocksize, &buf);
if (retval)
return retval;
-
+
retval = open_namei(fs, root, cwd, name, strlen(name), 0, 0,
buf, inode);
- ext2fs_free_mem((void **) &buf);
+ ext2fs_free_mem(&buf);
return retval;
}
-errcode_t ext2fs_namei_follow(ext2_filsys fs, ino_t root, ino_t cwd,
- const char *name, ino_t *inode)
+errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
+ const char *name, ext2_ino_t *inode)
{
char *buf;
errcode_t retval;
-
+
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
- retval = ext2fs_get_mem(fs->blocksize, (void **) &buf);
+ retval = ext2fs_get_mem(fs->blocksize, &buf);
if (retval)
return retval;
-
+
retval = open_namei(fs, root, cwd, name, strlen(name), 1, 0,
buf, inode);
- ext2fs_free_mem((void **) &buf);
+ ext2fs_free_mem(&buf);
return retval;
}
-extern errcode_t ext2fs_follow_link(ext2_filsys fs, ino_t root, ino_t cwd,
- ino_t inode, ino_t *res_inode)
+errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
+ ext2_ino_t inode, ext2_ino_t *res_inode)
{
char *buf;
errcode_t retval;
-
+
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
- retval = ext2fs_get_mem(fs->blocksize, (void **) &buf);
+ retval = ext2fs_get_mem(fs->blocksize, &buf);
if (retval)
return retval;
retval = follow_link(fs, root, cwd, inode, 0, buf, res_inode);
- ext2fs_free_mem((void **) &buf);
+ ext2fs_free_mem(&buf);
return retval;
}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff