1 | /*
|
---|
2 | * mkdir.c --- make a directory in the filesystem
|
---|
3 | *
|
---|
4 | * Copyright (C) 1994, 1995 Theodore Ts'o.
|
---|
5 | *
|
---|
6 | * %Begin-Header%
|
---|
7 | * This file may be redistributed under the terms of the GNU Public
|
---|
8 | * License.
|
---|
9 | * %End-Header%
|
---|
10 | */
|
---|
11 |
|
---|
12 | #include <stdio.h>
|
---|
13 | #include <string.h>
|
---|
14 | #if HAVE_UNISTD_H
|
---|
15 | #include <unistd.h>
|
---|
16 | #endif
|
---|
17 | #include <fcntl.h>
|
---|
18 | #include <time.h>
|
---|
19 | #if HAVE_SYS_STAT_H
|
---|
20 | #include <sys/stat.h>
|
---|
21 | #endif
|
---|
22 | #if HAVE_SYS_TYPES_H
|
---|
23 | #include <sys/types.h>
|
---|
24 | #endif
|
---|
25 |
|
---|
26 | #include "ext2_fs.h"
|
---|
27 | #include "ext2fs.h"
|
---|
28 |
|
---|
29 | #ifndef EXT2_FT_DIR
|
---|
30 | #define EXT2_FT_DIR 2
|
---|
31 | #endif
|
---|
32 |
|
---|
33 | errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
|
---|
34 | const char *name)
|
---|
35 | {
|
---|
36 | errcode_t retval;
|
---|
37 | struct ext2_inode parent_inode, inode;
|
---|
38 | ext2_ino_t ino = inum;
|
---|
39 | ext2_ino_t scratch_ino;
|
---|
40 | blk_t blk;
|
---|
41 | char *block = 0;
|
---|
42 |
|
---|
43 | EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
|
---|
44 |
|
---|
45 | /*
|
---|
46 | * Allocate an inode, if necessary
|
---|
47 | */
|
---|
48 | if (!ino) {
|
---|
49 | retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
|
---|
50 | 0, &ino);
|
---|
51 | if (retval)
|
---|
52 | goto cleanup;
|
---|
53 | }
|
---|
54 |
|
---|
55 | /*
|
---|
56 | * Allocate a data block for the directory
|
---|
57 | */
|
---|
58 | retval = ext2fs_new_block(fs, 0, 0, &blk);
|
---|
59 | if (retval)
|
---|
60 | goto cleanup;
|
---|
61 |
|
---|
62 | /*
|
---|
63 | * Create a scratch template for the directory
|
---|
64 | */
|
---|
65 | retval = ext2fs_new_dir_block(fs, ino, parent, &block);
|
---|
66 | if (retval)
|
---|
67 | goto cleanup;
|
---|
68 |
|
---|
69 | /*
|
---|
70 | * Get the parent's inode, if necessary
|
---|
71 | */
|
---|
72 | if (parent != ino) {
|
---|
73 | retval = ext2fs_read_inode(fs, parent, &parent_inode);
|
---|
74 | if (retval)
|
---|
75 | goto cleanup;
|
---|
76 | } else
|
---|
77 | memset(&parent_inode, 0, sizeof(parent_inode));
|
---|
78 |
|
---|
79 | /*
|
---|
80 | * Create the inode structure....
|
---|
81 | */
|
---|
82 | memset(&inode, 0, sizeof(struct ext2_inode));
|
---|
83 | inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
|
---|
84 | inode.i_uid = inode.i_gid = 0;
|
---|
85 | inode.i_blocks = fs->blocksize / 512;
|
---|
86 | inode.i_block[0] = blk;
|
---|
87 | inode.i_links_count = 2;
|
---|
88 | inode.i_ctime = inode.i_atime = inode.i_mtime = time(NULL);
|
---|
89 | inode.i_size = fs->blocksize;
|
---|
90 |
|
---|
91 | /*
|
---|
92 | * Write out the inode and inode data block
|
---|
93 | */
|
---|
94 | retval = ext2fs_write_dir_block(fs, blk, block);
|
---|
95 | if (retval)
|
---|
96 | goto cleanup;
|
---|
97 | retval = ext2fs_write_new_inode(fs, ino, &inode);
|
---|
98 | if (retval)
|
---|
99 | goto cleanup;
|
---|
100 |
|
---|
101 | /*
|
---|
102 | * Link the directory into the filesystem hierarchy
|
---|
103 | */
|
---|
104 | if (name) {
|
---|
105 | retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
|
---|
106 | &scratch_ino);
|
---|
107 | if (!retval) {
|
---|
108 | retval = EXT2_ET_DIR_EXISTS;
|
---|
109 | name = 0;
|
---|
110 | goto cleanup;
|
---|
111 | }
|
---|
112 | if (retval != EXT2_ET_FILE_NOT_FOUND)
|
---|
113 | goto cleanup;
|
---|
114 | retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
|
---|
115 | if (retval)
|
---|
116 | goto cleanup;
|
---|
117 | }
|
---|
118 |
|
---|
119 | /*
|
---|
120 | * Update parent inode's counts
|
---|
121 | */
|
---|
122 | if (parent != ino) {
|
---|
123 | parent_inode.i_links_count++;
|
---|
124 | retval = ext2fs_write_inode(fs, parent, &parent_inode);
|
---|
125 | if (retval)
|
---|
126 | goto cleanup;
|
---|
127 | }
|
---|
128 |
|
---|
129 | /*
|
---|
130 | * Update accounting....
|
---|
131 | */
|
---|
132 | ext2fs_block_alloc_stats(fs, blk, +1);
|
---|
133 | ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
|
---|
134 |
|
---|
135 | cleanup:
|
---|
136 | ext2fs_free_mem(&block);
|
---|
137 | return retval;
|
---|
138 |
|
---|
139 | }
|
---|
140 |
|
---|
141 |
|
---|