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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/qnx4
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/qnx4')
-rw-r--r--fs/qnx4/Makefile7
-rw-r--r--fs/qnx4/README9
-rw-r--r--fs/qnx4/bitmap.c165
-rw-r--r--fs/qnx4/dir.c99
-rw-r--r--fs/qnx4/file.c42
-rw-r--r--fs/qnx4/fsync.c170
-rw-r--r--fs/qnx4/inode.c603
-rw-r--r--fs/qnx4/namei.c249
-rw-r--r--fs/qnx4/truncate.c39
9 files changed, 1383 insertions, 0 deletions
diff --git a/fs/qnx4/Makefile b/fs/qnx4/Makefile
new file mode 100644
index 000000000000..502d7fe98bab
--- /dev/null
+++ b/fs/qnx4/Makefile
@@ -0,0 +1,7 @@
1#
2# Makefile for the linux qnx4-filesystem routines.
3#
4
5obj-$(CONFIG_QNX4FS_FS) += qnx4.o
6
7qnx4-objs := inode.o dir.o namei.o file.o bitmap.o truncate.o fsync.o
diff --git a/fs/qnx4/README b/fs/qnx4/README
new file mode 100644
index 000000000000..1f1e320d91da
--- /dev/null
+++ b/fs/qnx4/README
@@ -0,0 +1,9 @@
1
2 This is a snapshot of the QNX4 filesystem for Linux.
3 Please send diffs and remarks to <al@alarsen.net> .
4
5Credits :
6
7Richard "Scuba" A. Frowijn <scuba@wxs.nl>
8Frank "Jedi/Sector One" Denis <j@pureftpd.org>
9Anders Larsen <al@alarsen.net> (Maintainer)
diff --git a/fs/qnx4/bitmap.c b/fs/qnx4/bitmap.c
new file mode 100644
index 000000000000..991253927658
--- /dev/null
+++ b/fs/qnx4/bitmap.c
@@ -0,0 +1,165 @@
1/*
2 * QNX4 file system, Linux implementation.
3 *
4 * Version : 0.2.1
5 *
6 * Using parts of the xiafs filesystem.
7 *
8 * History :
9 *
10 * 28-05-1998 by Richard Frowijn : first release.
11 * 20-06-1998 by Frank Denis : basic optimisations.
12 * 25-06-1998 by Frank Denis : qnx4_is_free, qnx4_set_bitmap, qnx4_bmap .
13 * 28-06-1998 by Frank Denis : qnx4_free_inode (to be fixed) .
14 */
15
16#include <linux/config.h>
17#include <linux/time.h>
18#include <linux/fs.h>
19#include <linux/qnx4_fs.h>
20#include <linux/stat.h>
21#include <linux/kernel.h>
22#include <linux/string.h>
23#include <linux/buffer_head.h>
24#include <linux/bitops.h>
25
26int qnx4_new_block(struct super_block *sb)
27{
28 return 0;
29}
30
31static void count_bits(register const char *bmPart, register int size,
32 int *const tf)
33{
34 char b;
35 int tot = *tf;
36
37 if (size > QNX4_BLOCK_SIZE) {
38 size = QNX4_BLOCK_SIZE;
39 }
40 do {
41 b = *bmPart++;
42 if ((b & 1) == 0)
43 tot++;
44 if ((b & 2) == 0)
45 tot++;
46 if ((b & 4) == 0)
47 tot++;
48 if ((b & 8) == 0)
49 tot++;
50 if ((b & 16) == 0)
51 tot++;
52 if ((b & 32) == 0)
53 tot++;
54 if ((b & 64) == 0)
55 tot++;
56 if ((b & 128) == 0)
57 tot++;
58 size--;
59 } while (size != 0);
60 *tf = tot;
61}
62
63unsigned long qnx4_count_free_blocks(struct super_block *sb)
64{
65 int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
66 int total = 0;
67 int total_free = 0;
68 int offset = 0;
69 int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
70 struct buffer_head *bh;
71
72 while (total < size) {
73 if ((bh = sb_bread(sb, start + offset)) == NULL) {
74 printk("qnx4: I/O error in counting free blocks\n");
75 break;
76 }
77 count_bits(bh->b_data, size - total, &total_free);
78 brelse(bh);
79 total += QNX4_BLOCK_SIZE;
80 offset++;
81 }
82
83 return total_free;
84}
85
86#ifdef CONFIG_QNX4FS_RW
87
88int qnx4_is_free(struct super_block *sb, long block)
89{
90 int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
91 int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
92 struct buffer_head *bh;
93 const char *g;
94 int ret = -EIO;
95
96 start += block / (QNX4_BLOCK_SIZE * 8);
97 QNX4DEBUG(("qnx4: is_free requesting block [%lu], bitmap in block [%lu]\n",
98 (unsigned long) block, (unsigned long) start));
99 (void) size; /* CHECKME */
100 bh = sb_bread(sb, start);
101 if (bh == NULL) {
102 return -EIO;
103 }
104 g = bh->b_data + (block % QNX4_BLOCK_SIZE);
105 if (((*g) & (1 << (block % 8))) == 0) {
106 QNX4DEBUG(("qnx4: is_free -> block is free\n"));
107 ret = 1;
108 } else {
109 QNX4DEBUG(("qnx4: is_free -> block is busy\n"));
110 ret = 0;
111 }
112 brelse(bh);
113
114 return ret;
115}
116
117int qnx4_set_bitmap(struct super_block *sb, long block, int busy)
118{
119 int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
120 int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
121 struct buffer_head *bh;
122 char *g;
123
124 start += block / (QNX4_BLOCK_SIZE * 8);
125 QNX4DEBUG(("qnx4: set_bitmap requesting block [%lu], bitmap in block [%lu]\n",
126 (unsigned long) block, (unsigned long) start));
127 (void) size; /* CHECKME */
128 bh = sb_bread(sb, start);
129 if (bh == NULL) {
130 return -EIO;
131 }
132 g = bh->b_data + (block % QNX4_BLOCK_SIZE);
133 if (busy == 0) {
134 (*g) &= ~(1 << (block % 8));
135 } else {
136 (*g) |= (1 << (block % 8));
137 }
138 mark_buffer_dirty(bh);
139 brelse(bh);
140
141 return 0;
142}
143
144static void qnx4_clear_inode(struct inode *inode)
145{
146 struct qnx4_inode_entry *qnx4_ino = qnx4_raw_inode(inode);
147 /* What for? */
148 memset(qnx4_ino->di_fname, 0, sizeof qnx4_ino->di_fname);
149 qnx4_ino->di_size = 0;
150 qnx4_ino->di_num_xtnts = 0;
151 qnx4_ino->di_mode = 0;
152 qnx4_ino->di_status = 0;
153}
154
155void qnx4_free_inode(struct inode *inode)
156{
157 if (inode->i_ino < 1) {
158 printk("free_inode: inode 0 or nonexistent inode\n");
159 return;
160 }
161 qnx4_clear_inode(inode);
162 clear_inode(inode);
163}
164
165#endif
diff --git a/fs/qnx4/dir.c b/fs/qnx4/dir.c
new file mode 100644
index 000000000000..cd66147cca04
--- /dev/null
+++ b/fs/qnx4/dir.c
@@ -0,0 +1,99 @@
1/*
2 * QNX4 file system, Linux implementation.
3 *
4 * Version : 0.2.1
5 *
6 * Using parts of the xiafs filesystem.
7 *
8 * History :
9 *
10 * 28-05-1998 by Richard Frowijn : first release.
11 * 20-06-1998 by Frank Denis : Linux 2.1.99+ & dcache support.
12 */
13
14#include <linux/config.h>
15#include <linux/string.h>
16#include <linux/errno.h>
17#include <linux/fs.h>
18#include <linux/qnx4_fs.h>
19#include <linux/stat.h>
20#include <linux/smp_lock.h>
21#include <linux/buffer_head.h>
22
23
24static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir)
25{
26 struct inode *inode = filp->f_dentry->d_inode;
27 unsigned int offset;
28 struct buffer_head *bh;
29 struct qnx4_inode_entry *de;
30 struct qnx4_link_info *le;
31 unsigned long blknum;
32 int ix, ino;
33 int size;
34
35 QNX4DEBUG(("qnx4_readdir:i_size = %ld\n", (long) inode->i_size));
36 QNX4DEBUG(("filp->f_pos = %ld\n", (long) filp->f_pos));
37
38 lock_kernel();
39
40 while (filp->f_pos < inode->i_size) {
41 blknum = qnx4_block_map( inode, filp->f_pos >> QNX4_BLOCK_SIZE_BITS );
42 bh = sb_bread(inode->i_sb, blknum);
43 if(bh==NULL) {
44 printk(KERN_ERR "qnx4_readdir: bread failed (%ld)\n", blknum);
45 break;
46 }
47 ix = (int)(filp->f_pos >> QNX4_DIR_ENTRY_SIZE_BITS) % QNX4_INODES_PER_BLOCK;
48 while (ix < QNX4_INODES_PER_BLOCK) {
49 offset = ix * QNX4_DIR_ENTRY_SIZE;
50 de = (struct qnx4_inode_entry *) (bh->b_data + offset);
51 size = strlen(de->di_fname);
52 if (size) {
53 if ( !( de->di_status & QNX4_FILE_LINK ) && size > QNX4_SHORT_NAME_MAX )
54 size = QNX4_SHORT_NAME_MAX;
55 else if ( size > QNX4_NAME_MAX )
56 size = QNX4_NAME_MAX;
57
58 if ( ( de->di_status & (QNX4_FILE_USED|QNX4_FILE_LINK) ) != 0 ) {
59 QNX4DEBUG(("qnx4_readdir:%.*s\n", size, de->di_fname));
60 if ( ( de->di_status & QNX4_FILE_LINK ) == 0 )
61 ino = blknum * QNX4_INODES_PER_BLOCK + ix - 1;
62 else {
63 le = (struct qnx4_link_info*)de;
64 ino = ( le->dl_inode_blk - 1 ) *
65 QNX4_INODES_PER_BLOCK +
66 le->dl_inode_ndx;
67 }
68 if (filldir(dirent, de->di_fname, size, filp->f_pos, ino, DT_UNKNOWN) < 0) {
69 brelse(bh);
70 goto out;
71 }
72 }
73 }
74 ix++;
75 filp->f_pos += QNX4_DIR_ENTRY_SIZE;
76 }
77 brelse(bh);
78 }
79out:
80 unlock_kernel();
81 return 0;
82}
83
84struct file_operations qnx4_dir_operations =
85{
86 .read = generic_read_dir,
87 .readdir = qnx4_readdir,
88 .fsync = file_fsync,
89};
90
91struct inode_operations qnx4_dir_inode_operations =
92{
93 .lookup = qnx4_lookup,
94#ifdef CONFIG_QNX4FS_RW
95 .create = qnx4_create,
96 .unlink = qnx4_unlink,
97 .rmdir = qnx4_rmdir,
98#endif
99};
diff --git a/fs/qnx4/file.c b/fs/qnx4/file.c
new file mode 100644
index 000000000000..b471315e24ef
--- /dev/null
+++ b/fs/qnx4/file.c
@@ -0,0 +1,42 @@
1/*
2 * QNX4 file system, Linux implementation.
3 *
4 * Version : 0.2.1
5 *
6 * Using parts of the xiafs filesystem.
7 *
8 * History :
9 *
10 * 25-05-1998 by Richard Frowijn : first release.
11 * 21-06-1998 by Frank Denis : wrote qnx4_readpage to use generic_file_read.
12 * 27-06-1998 by Frank Denis : file overwriting.
13 */
14
15#include <linux/config.h>
16#include <linux/types.h>
17#include <linux/fs.h>
18#include <linux/time.h>
19#include <linux/qnx4_fs.h>
20
21/*
22 * We have mostly NULL's here: the current defaults are ok for
23 * the qnx4 filesystem.
24 */
25struct file_operations qnx4_file_operations =
26{
27 .llseek = generic_file_llseek,
28 .read = generic_file_read,
29 .mmap = generic_file_mmap,
30 .sendfile = generic_file_sendfile,
31#ifdef CONFIG_QNX4FS_RW
32 .write = generic_file_write,
33 .fsync = qnx4_sync_file,
34#endif
35};
36
37struct inode_operations qnx4_file_inode_operations =
38{
39#ifdef CONFIG_QNX4FS_RW
40 .truncate = qnx4_truncate,
41#endif
42};
diff --git a/fs/qnx4/fsync.c b/fs/qnx4/fsync.c
new file mode 100644
index 000000000000..df5bc75d5414
--- /dev/null
+++ b/fs/qnx4/fsync.c
@@ -0,0 +1,170 @@
1/*
2 * QNX4 file system, Linux implementation.
3 *
4 * Version : 0.1
5 *
6 * Using parts of the xiafs filesystem.
7 *
8 * History :
9 *
10 * 24-03-1998 by Richard Frowijn : first release.
11 */
12
13#include <linux/config.h>
14#include <linux/errno.h>
15#include <linux/time.h>
16#include <linux/stat.h>
17#include <linux/fcntl.h>
18#include <linux/smp_lock.h>
19#include <linux/buffer_head.h>
20
21#include <linux/fs.h>
22#include <linux/qnx4_fs.h>
23
24#include <asm/system.h>
25
26/*
27 * The functions for qnx4 fs file synchronization.
28 */
29
30#ifdef CONFIG_QNX4FS_RW
31
32static int sync_block(struct inode *inode, unsigned short *block, int wait)
33{
34 struct buffer_head *bh;
35 unsigned short tmp;
36
37 if (!*block)
38 return 0;
39 tmp = *block;
40 bh = sb_find_get_block(inode->i_sb, *block);
41 if (!bh)
42 return 0;
43 if (*block != tmp) {
44 brelse(bh);
45 return 1;
46 }
47 if (wait && buffer_req(bh) && !buffer_uptodate(bh)) {
48 brelse(bh);
49 return -1;
50 }
51 if (wait || !buffer_uptodate(bh) || !buffer_dirty(bh)) {
52 brelse(bh);
53 return 0;
54 }
55 ll_rw_block(WRITE, 1, &bh);
56 atomic_dec(&bh->b_count);
57 return 0;
58}
59
60#ifdef WTF
61static int sync_iblock(struct inode *inode, unsigned short *iblock,
62 struct buffer_head **bh, int wait)
63{
64 int rc;
65 unsigned short tmp;
66
67 *bh = NULL;
68 tmp = *iblock;
69 if (!tmp)
70 return 0;
71 rc = sync_block(inode, iblock, wait);
72 if (rc)
73 return rc;
74 *bh = sb_bread(inode->i_sb, tmp);
75 if (tmp != *iblock) {
76 brelse(*bh);
77 *bh = NULL;
78 return 1;
79 }
80 if (!*bh)
81 return -1;
82 return 0;
83}
84#endif
85
86static int sync_direct(struct inode *inode, int wait)
87{
88 int i;
89 int rc, err = 0;
90
91 for (i = 0; i < 7; i++) {
92 rc = sync_block(inode,
93 (unsigned short *) qnx4_raw_inode(inode)->di_first_xtnt.xtnt_blk + i, wait);
94 if (rc > 0)
95 break;
96 if (rc)
97 err = rc;
98 }
99 return err;
100}
101
102#ifdef WTF
103static int sync_indirect(struct inode *inode, unsigned short *iblock, int wait)
104{
105 int i;
106 struct buffer_head *ind_bh;
107 int rc, err = 0;
108
109 rc = sync_iblock(inode, iblock, &ind_bh, wait);
110 if (rc || !ind_bh)
111 return rc;
112
113 for (i = 0; i < 512; i++) {
114 rc = sync_block(inode,
115 ((unsigned short *) ind_bh->b_data) + i,
116 wait);
117 if (rc > 0)
118 break;
119 if (rc)
120 err = rc;
121 }
122 brelse(ind_bh);
123 return err;
124}
125
126static int sync_dindirect(struct inode *inode, unsigned short *diblock,
127 int wait)
128{
129 int i;
130 struct buffer_head *dind_bh;
131 int rc, err = 0;
132
133 rc = sync_iblock(inode, diblock, &dind_bh, wait);
134 if (rc || !dind_bh)
135 return rc;
136
137 for (i = 0; i < 512; i++) {
138 rc = sync_indirect(inode,
139 ((unsigned short *) dind_bh->b_data) + i,
140 wait);
141 if (rc > 0)
142 break;
143 if (rc)
144 err = rc;
145 }
146 brelse(dind_bh);
147 return err;
148}
149#endif
150
151int qnx4_sync_file(struct file *file, struct dentry *dentry, int unused)
152{
153 struct inode *inode = dentry->d_inode;
154 int wait, err = 0;
155
156 (void) file;
157 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
158 S_ISLNK(inode->i_mode)))
159 return -EINVAL;
160
161 lock_kernel();
162 for (wait = 0; wait <= 1; wait++) {
163 err |= sync_direct(inode, wait);
164 }
165 err |= qnx4_sync_inode(inode);
166 unlock_kernel();
167 return (err < 0) ? -EIO : 0;
168}
169
170#endif
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
new file mode 100644
index 000000000000..aa92d6b76a9a
--- /dev/null
+++ b/fs/qnx4/inode.c
@@ -0,0 +1,603 @@
1/*
2 * QNX4 file system, Linux implementation.
3 *
4 * Version : 0.2.1
5 *
6 * Using parts of the xiafs filesystem.
7 *
8 * History :
9 *
10 * 01-06-1998 by Richard Frowijn : first release.
11 * 20-06-1998 by Frank Denis : Linux 2.1.99+ support, boot signature, misc.
12 * 30-06-1998 by Frank Denis : first step to write inodes.
13 */
14
15#include <linux/config.h>
16#include <linux/module.h>
17#include <linux/types.h>
18#include <linux/string.h>
19#include <linux/errno.h>
20#include <linux/slab.h>
21#include <linux/fs.h>
22#include <linux/qnx4_fs.h>
23#include <linux/init.h>
24#include <linux/highuid.h>
25#include <linux/smp_lock.h>
26#include <linux/pagemap.h>
27#include <linux/buffer_head.h>
28#include <linux/vfs.h>
29#include <asm/uaccess.h>
30
31#define QNX4_VERSION 4
32#define QNX4_BMNAME ".bitmap"
33
34static struct super_operations qnx4_sops;
35
36#ifdef CONFIG_QNX4FS_RW
37
38int qnx4_sync_inode(struct inode *inode)
39{
40 int err = 0;
41# if 0
42 struct buffer_head *bh;
43
44 bh = qnx4_update_inode(inode);
45 if (bh && buffer_dirty(bh))
46 {
47 sync_dirty_buffer(bh);
48 if (buffer_req(bh) && !buffer_uptodate(bh))
49 {
50 printk ("IO error syncing qnx4 inode [%s:%08lx]\n",
51 inode->i_sb->s_id, inode->i_ino);
52 err = -1;
53 }
54 brelse (bh);
55 } else if (!bh) {
56 err = -1;
57 }
58# endif
59
60 return err;
61}
62
63static void qnx4_delete_inode(struct inode *inode)
64{
65 QNX4DEBUG(("qnx4: deleting inode [%lu]\n", (unsigned long) inode->i_ino));
66 inode->i_size = 0;
67 qnx4_truncate(inode);
68 lock_kernel();
69 qnx4_free_inode(inode);
70 unlock_kernel();
71}
72
73static void qnx4_write_super(struct super_block *sb)
74{
75 lock_kernel();
76 QNX4DEBUG(("qnx4: write_super\n"));
77 sb->s_dirt = 0;
78 unlock_kernel();
79}
80
81static int qnx4_write_inode(struct inode *inode, int unused)
82{
83 struct qnx4_inode_entry *raw_inode;
84 int block, ino;
85 struct buffer_head *bh;
86 ino = inode->i_ino;
87
88 QNX4DEBUG(("qnx4: write inode 1.\n"));
89 if (inode->i_nlink == 0) {
90 return 0;
91 }
92 if (!ino) {
93 printk("qnx4: bad inode number on dev %s: %d is out of range\n",
94 inode->i_sb->s_id, ino);
95 return -EIO;
96 }
97 QNX4DEBUG(("qnx4: write inode 2.\n"));
98 block = ino / QNX4_INODES_PER_BLOCK;
99 lock_kernel();
100 if (!(bh = sb_bread(inode->i_sb, block))) {
101 printk("qnx4: major problem: unable to read inode from dev "
102 "%s\n", inode->i_sb->s_id);
103 unlock_kernel();
104 return -EIO;
105 }
106 raw_inode = ((struct qnx4_inode_entry *) bh->b_data) +
107 (ino % QNX4_INODES_PER_BLOCK);
108 raw_inode->di_mode = cpu_to_le16(inode->i_mode);
109 raw_inode->di_uid = cpu_to_le16(fs_high2lowuid(inode->i_uid));
110 raw_inode->di_gid = cpu_to_le16(fs_high2lowgid(inode->i_gid));
111 raw_inode->di_nlink = cpu_to_le16(inode->i_nlink);
112 raw_inode->di_size = cpu_to_le32(inode->i_size);
113 raw_inode->di_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
114 raw_inode->di_atime = cpu_to_le32(inode->i_atime.tv_sec);
115 raw_inode->di_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
116 raw_inode->di_first_xtnt.xtnt_size = cpu_to_le32(inode->i_blocks);
117 mark_buffer_dirty(bh);
118 brelse(bh);
119 unlock_kernel();
120 return 0;
121}
122
123#endif
124
125static void qnx4_put_super(struct super_block *sb);
126static struct inode *qnx4_alloc_inode(struct super_block *sb);
127static void qnx4_destroy_inode(struct inode *inode);
128static void qnx4_read_inode(struct inode *);
129static int qnx4_remount(struct super_block *sb, int *flags, char *data);
130static int qnx4_statfs(struct super_block *, struct kstatfs *);
131
132static struct super_operations qnx4_sops =
133{
134 .alloc_inode = qnx4_alloc_inode,
135 .destroy_inode = qnx4_destroy_inode,
136 .read_inode = qnx4_read_inode,
137 .put_super = qnx4_put_super,
138 .statfs = qnx4_statfs,
139 .remount_fs = qnx4_remount,
140#ifdef CONFIG_QNX4FS_RW
141 .write_inode = qnx4_write_inode,
142 .delete_inode = qnx4_delete_inode,
143 .write_super = qnx4_write_super,
144#endif
145};
146
147static int qnx4_remount(struct super_block *sb, int *flags, char *data)
148{
149 struct qnx4_sb_info *qs;
150
151 qs = qnx4_sb(sb);
152 qs->Version = QNX4_VERSION;
153#ifndef CONFIG_QNX4FS_RW
154 *flags |= MS_RDONLY;
155#endif
156 if (*flags & MS_RDONLY) {
157 return 0;
158 }
159
160 mark_buffer_dirty(qs->sb_buf);
161
162 return 0;
163}
164
165static struct buffer_head *qnx4_getblk(struct inode *inode, int nr,
166 int create)
167{
168 struct buffer_head *result = NULL;
169
170 if ( nr >= 0 )
171 nr = qnx4_block_map( inode, nr );
172 if (nr) {
173 result = sb_getblk(inode->i_sb, nr);
174 return result;
175 }
176 if (!create) {
177 return NULL;
178 }
179#if 0
180 tmp = qnx4_new_block(inode->i_sb);
181 if (!tmp) {
182 return NULL;
183 }
184 result = sb_getblk(inode->i_sb, tmp);
185 if (tst) {
186 qnx4_free_block(inode->i_sb, tmp);
187 brelse(result);
188 goto repeat;
189 }
190 tst = tmp;
191#endif
192 inode->i_ctime = CURRENT_TIME_SEC;
193 mark_inode_dirty(inode);
194 return result;
195}
196
197struct buffer_head *qnx4_bread(struct inode *inode, int block, int create)
198{
199 struct buffer_head *bh;
200
201 bh = qnx4_getblk(inode, block, create);
202 if (!bh || buffer_uptodate(bh)) {
203 return bh;
204 }
205 ll_rw_block(READ, 1, &bh);
206 wait_on_buffer(bh);
207 if (buffer_uptodate(bh)) {
208 return bh;
209 }
210 brelse(bh);
211
212 return NULL;
213}
214
215static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_head *bh, int create )
216{
217 unsigned long phys;
218
219 QNX4DEBUG(("qnx4: qnx4_get_block inode=[%ld] iblock=[%ld]\n",inode->i_ino,iblock));
220
221 phys = qnx4_block_map( inode, iblock );
222 if ( phys ) {
223 // logical block is before EOF
224 map_bh(bh, inode->i_sb, phys);
225 } else if ( create ) {
226 // to be done.
227 }
228 return 0;
229}
230
231unsigned long qnx4_block_map( struct inode *inode, long iblock )
232{
233 int ix;
234 long offset, i_xblk;
235 unsigned long block = 0;
236 struct buffer_head *bh = NULL;
237 struct qnx4_xblk *xblk = NULL;
238 struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode);
239 qnx4_nxtnt_t nxtnt = le16_to_cpu(qnx4_inode->di_num_xtnts);
240
241 if ( iblock < le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size) ) {
242 // iblock is in the first extent. This is easy.
243 block = le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_blk) + iblock - 1;
244 } else {
245 // iblock is beyond first extent. We have to follow the extent chain.
246 i_xblk = le32_to_cpu(qnx4_inode->di_xblk);
247 offset = iblock - le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size);
248 ix = 0;
249 while ( --nxtnt > 0 ) {
250 if ( ix == 0 ) {
251 // read next xtnt block.
252 bh = sb_bread(inode->i_sb, i_xblk - 1);
253 if ( !bh ) {
254 QNX4DEBUG(("qnx4: I/O error reading xtnt block [%ld])\n", i_xblk - 1));
255 return -EIO;
256 }
257 xblk = (struct qnx4_xblk*)bh->b_data;
258 if ( memcmp( xblk->xblk_signature, "IamXblk", 7 ) ) {
259 QNX4DEBUG(("qnx4: block at %ld is not a valid xtnt\n", qnx4_inode->i_xblk));
260 return -EIO;
261 }
262 }
263 if ( offset < le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size) ) {
264 // got it!
265 block = le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_blk) + offset - 1;
266 break;
267 }
268 offset -= le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size);
269 if ( ++ix >= xblk->xblk_num_xtnts ) {
270 i_xblk = le32_to_cpu(xblk->xblk_next_xblk);
271 ix = 0;
272 brelse( bh );
273 bh = NULL;
274 }
275 }
276 if ( bh )
277 brelse( bh );
278 }
279
280 QNX4DEBUG(("qnx4: mapping block %ld of inode %ld = %ld\n",iblock,inode->i_ino,block));
281 return block;
282}
283
284static int qnx4_statfs(struct super_block *sb, struct kstatfs *buf)
285{
286 lock_kernel();
287
288 buf->f_type = sb->s_magic;
289 buf->f_bsize = sb->s_blocksize;
290 buf->f_blocks = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size) * 8;
291 buf->f_bfree = qnx4_count_free_blocks(sb);
292 buf->f_bavail = buf->f_bfree;
293 buf->f_namelen = QNX4_NAME_MAX;
294
295 unlock_kernel();
296
297 return 0;
298}
299
300/*
301 * Check the root directory of the filesystem to make sure
302 * it really _is_ a qnx4 filesystem, and to check the size
303 * of the directory entry.
304 */
305static const char *qnx4_checkroot(struct super_block *sb)
306{
307 struct buffer_head *bh;
308 struct qnx4_inode_entry *rootdir;
309 int rd, rl;
310 int i, j;
311 int found = 0;
312
313 if (*(qnx4_sb(sb)->sb->RootDir.di_fname) != '/') {
314 return "no qnx4 filesystem (no root dir).";
315 } else {
316 QNX4DEBUG(("QNX4 filesystem found on dev %s.\n", sb->s_id));
317 rd = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_blk) - 1;
318 rl = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_size);
319 for (j = 0; j < rl; j++) {
320 bh = sb_bread(sb, rd + j); /* root dir, first block */
321 if (bh == NULL) {
322 return "unable to read root entry.";
323 }
324 for (i = 0; i < QNX4_INODES_PER_BLOCK; i++) {
325 rootdir = (struct qnx4_inode_entry *) (bh->b_data + i * QNX4_DIR_ENTRY_SIZE);
326 if (rootdir->di_fname != NULL) {
327 QNX4DEBUG(("Rootdir entry found : [%s]\n", rootdir->di_fname));
328 if (!strncmp(rootdir->di_fname, QNX4_BMNAME, sizeof QNX4_BMNAME)) {
329 found = 1;
330 qnx4_sb(sb)->BitMap = kmalloc( sizeof( struct qnx4_inode_entry ), GFP_KERNEL );
331 if (!qnx4_sb(sb)->BitMap) {
332 brelse (bh);
333 return "not enough memory for bitmap inode";
334 }
335 memcpy( qnx4_sb(sb)->BitMap, rootdir, sizeof( struct qnx4_inode_entry ) ); /* keep bitmap inode known */
336 break;
337 }
338 }
339 }
340 brelse(bh);
341 if (found != 0) {
342 break;
343 }
344 }
345 if (found == 0) {
346 return "bitmap file not found.";
347 }
348 }
349 return NULL;
350}
351
352static int qnx4_fill_super(struct super_block *s, void *data, int silent)
353{
354 struct buffer_head *bh;
355 struct inode *root;
356 const char *errmsg;
357 struct qnx4_sb_info *qs;
358
359 qs = kmalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
360 if (!qs)
361 return -ENOMEM;
362 s->s_fs_info = qs;
363 memset(qs, 0, sizeof(struct qnx4_sb_info));
364
365 sb_set_blocksize(s, QNX4_BLOCK_SIZE);
366
367 /* Check the superblock signature. Since the qnx4 code is
368 dangerous, we should leave as quickly as possible
369 if we don't belong here... */
370 bh = sb_bread(s, 1);
371 if (!bh) {
372 printk("qnx4: unable to read the superblock\n");
373 goto outnobh;
374 }
375 if ( le32_to_cpu( *(__u32*)bh->b_data ) != QNX4_SUPER_MAGIC ) {
376 if (!silent)
377 printk("qnx4: wrong fsid in superblock.\n");
378 goto out;
379 }
380 s->s_op = &qnx4_sops;
381 s->s_magic = QNX4_SUPER_MAGIC;
382#ifndef CONFIG_QNX4FS_RW
383 s->s_flags |= MS_RDONLY; /* Yup, read-only yet */
384#endif
385 qnx4_sb(s)->sb_buf = bh;
386 qnx4_sb(s)->sb = (struct qnx4_super_block *) bh->b_data;
387
388
389 /* check before allocating dentries, inodes, .. */
390 errmsg = qnx4_checkroot(s);
391 if (errmsg != NULL) {
392 if (!silent)
393 printk("qnx4: %s\n", errmsg);
394 goto out;
395 }
396
397 /* does root not have inode number QNX4_ROOT_INO ?? */
398 root = iget(s, QNX4_ROOT_INO * QNX4_INODES_PER_BLOCK);
399 if (!root) {
400 printk("qnx4: get inode failed\n");
401 goto out;
402 }
403
404 s->s_root = d_alloc_root(root);
405 if (s->s_root == NULL)
406 goto outi;
407
408 brelse(bh);
409
410 return 0;
411
412 outi:
413 iput(root);
414 out:
415 brelse(bh);
416 outnobh:
417 kfree(qs);
418 s->s_fs_info = NULL;
419 return -EINVAL;
420}
421
422static void qnx4_put_super(struct super_block *sb)
423{
424 struct qnx4_sb_info *qs = qnx4_sb(sb);
425 kfree( qs->BitMap );
426 kfree( qs );
427 sb->s_fs_info = NULL;
428 return;
429}
430
431static int qnx4_writepage(struct page *page, struct writeback_control *wbc)
432{
433 return block_write_full_page(page,qnx4_get_block, wbc);
434}
435static int qnx4_readpage(struct file *file, struct page *page)
436{
437 return block_read_full_page(page,qnx4_get_block);
438}
439static int qnx4_prepare_write(struct file *file, struct page *page,
440 unsigned from, unsigned to)
441{
442 struct qnx4_inode_info *qnx4_inode = qnx4_i(page->mapping->host);
443 return cont_prepare_write(page, from, to, qnx4_get_block,
444 &qnx4_inode->mmu_private);
445}
446static sector_t qnx4_bmap(struct address_space *mapping, sector_t block)
447{
448 return generic_block_bmap(mapping,block,qnx4_get_block);
449}
450static struct address_space_operations qnx4_aops = {
451 .readpage = qnx4_readpage,
452 .writepage = qnx4_writepage,
453 .sync_page = block_sync_page,
454 .prepare_write = qnx4_prepare_write,
455 .commit_write = generic_commit_write,
456 .bmap = qnx4_bmap
457};
458
459static void qnx4_read_inode(struct inode *inode)
460{
461 struct buffer_head *bh;
462 struct qnx4_inode_entry *raw_inode;
463 int block, ino;
464 struct super_block *sb = inode->i_sb;
465 struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode);
466
467 ino = inode->i_ino;
468 inode->i_mode = 0;
469
470 QNX4DEBUG(("Reading inode : [%d]\n", ino));
471 if (!ino) {
472 printk("qnx4: bad inode number on dev %s: %d is out of range\n",
473 sb->s_id, ino);
474 return;
475 }
476 block = ino / QNX4_INODES_PER_BLOCK;
477
478 if (!(bh = sb_bread(sb, block))) {
479 printk("qnx4: major problem: unable to read inode from dev "
480 "%s\n", sb->s_id);
481 return;
482 }
483 raw_inode = ((struct qnx4_inode_entry *) bh->b_data) +
484 (ino % QNX4_INODES_PER_BLOCK);
485
486 inode->i_mode = le16_to_cpu(raw_inode->di_mode);
487 inode->i_uid = (uid_t)le16_to_cpu(raw_inode->di_uid);
488 inode->i_gid = (gid_t)le16_to_cpu(raw_inode->di_gid);
489 inode->i_nlink = le16_to_cpu(raw_inode->di_nlink);
490 inode->i_size = le32_to_cpu(raw_inode->di_size);
491 inode->i_mtime.tv_sec = le32_to_cpu(raw_inode->di_mtime);
492 inode->i_mtime.tv_nsec = 0;
493 inode->i_atime.tv_sec = le32_to_cpu(raw_inode->di_atime);
494 inode->i_atime.tv_nsec = 0;
495 inode->i_ctime.tv_sec = le32_to_cpu(raw_inode->di_ctime);
496 inode->i_ctime.tv_nsec = 0;
497 inode->i_blocks = le32_to_cpu(raw_inode->di_first_xtnt.xtnt_size);
498 inode->i_blksize = QNX4_DIR_ENTRY_SIZE;
499
500 memcpy(qnx4_inode, raw_inode, QNX4_DIR_ENTRY_SIZE);
501 if (S_ISREG(inode->i_mode)) {
502 inode->i_op = &qnx4_file_inode_operations;
503 inode->i_fop = &qnx4_file_operations;
504 inode->i_mapping->a_ops = &qnx4_aops;
505 qnx4_i(inode)->mmu_private = inode->i_size;
506 } else if (S_ISDIR(inode->i_mode)) {
507 inode->i_op = &qnx4_dir_inode_operations;
508 inode->i_fop = &qnx4_dir_operations;
509 } else if (S_ISLNK(inode->i_mode)) {
510 inode->i_op = &page_symlink_inode_operations;
511 inode->i_mapping->a_ops = &qnx4_aops;
512 qnx4_i(inode)->mmu_private = inode->i_size;
513 } else
514 printk("qnx4: bad inode %d on dev %s\n",ino,sb->s_id);
515 brelse(bh);
516}
517
518static kmem_cache_t *qnx4_inode_cachep;
519
520static struct inode *qnx4_alloc_inode(struct super_block *sb)
521{
522 struct qnx4_inode_info *ei;
523 ei = kmem_cache_alloc(qnx4_inode_cachep, SLAB_KERNEL);
524 if (!ei)
525 return NULL;
526 return &ei->vfs_inode;
527}
528
529static void qnx4_destroy_inode(struct inode *inode)
530{
531 kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode));
532}
533
534static void init_once(void *foo, kmem_cache_t * cachep,
535 unsigned long flags)
536{
537 struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo;
538
539 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
540 SLAB_CTOR_CONSTRUCTOR)
541 inode_init_once(&ei->vfs_inode);
542}
543
544static int init_inodecache(void)
545{
546 qnx4_inode_cachep = kmem_cache_create("qnx4_inode_cache",
547 sizeof(struct qnx4_inode_info),
548 0, SLAB_RECLAIM_ACCOUNT,
549 init_once, NULL);
550 if (qnx4_inode_cachep == NULL)
551 return -ENOMEM;
552 return 0;
553}
554
555static void destroy_inodecache(void)
556{
557 if (kmem_cache_destroy(qnx4_inode_cachep))
558 printk(KERN_INFO
559 "qnx4_inode_cache: not all structures were freed\n");
560}
561
562static struct super_block *qnx4_get_sb(struct file_system_type *fs_type,
563 int flags, const char *dev_name, void *data)
564{
565 return get_sb_bdev(fs_type, flags, dev_name, data, qnx4_fill_super);
566}
567
568static struct file_system_type qnx4_fs_type = {
569 .owner = THIS_MODULE,
570 .name = "qnx4",
571 .get_sb = qnx4_get_sb,
572 .kill_sb = kill_block_super,
573 .fs_flags = FS_REQUIRES_DEV,
574};
575
576static int __init init_qnx4_fs(void)
577{
578 int err;
579
580 err = init_inodecache();
581 if (err)
582 return err;
583
584 err = register_filesystem(&qnx4_fs_type);
585 if (err) {
586 destroy_inodecache();
587 return err;
588 }
589
590 printk("QNX4 filesystem 0.2.3 registered.\n");
591 return 0;
592}
593
594static void __exit exit_qnx4_fs(void)
595{
596 unregister_filesystem(&qnx4_fs_type);
597 destroy_inodecache();
598}
599
600module_init(init_qnx4_fs)
601module_exit(exit_qnx4_fs)
602MODULE_LICENSE("GPL");
603
diff --git a/fs/qnx4/namei.c b/fs/qnx4/namei.c
new file mode 100644
index 000000000000..4af4951d7f54
--- /dev/null
+++ b/fs/qnx4/namei.c
@@ -0,0 +1,249 @@
1/*
2 * QNX4 file system, Linux implementation.
3 *
4 * Version : 0.2.1
5 *
6 * Using parts of the xiafs filesystem.
7 *
8 * History :
9 *
10 * 01-06-1998 by Richard Frowijn : first release.
11 * 21-06-1998 by Frank Denis : dcache support, fixed error codes.
12 * 04-07-1998 by Frank Denis : first step for rmdir/unlink.
13 */
14
15#include <linux/config.h>
16#include <linux/time.h>
17#include <linux/fs.h>
18#include <linux/qnx4_fs.h>
19#include <linux/kernel.h>
20#include <linux/string.h>
21#include <linux/stat.h>
22#include <linux/fcntl.h>
23#include <linux/errno.h>
24#include <linux/smp_lock.h>
25#include <linux/buffer_head.h>
26
27
28/*
29 * check if the filename is correct. For some obscure reason, qnx writes a
30 * new file twice in the directory entry, first with all possible options at 0
31 * and for a second time the way it is, they want us not to access the qnx
32 * filesystem when whe are using linux.
33 */
34static int qnx4_match(int len, const char *name,
35 struct buffer_head *bh, unsigned long *offset)
36{
37 struct qnx4_inode_entry *de;
38 int namelen, thislen;
39
40 if (bh == NULL) {
41 printk("qnx4: matching unassigned buffer !\n");
42 return 0;
43 }
44 de = (struct qnx4_inode_entry *) (bh->b_data + *offset);
45 *offset += QNX4_DIR_ENTRY_SIZE;
46 if ((de->di_status & QNX4_FILE_LINK) != 0) {
47 namelen = QNX4_NAME_MAX;
48 } else {
49 namelen = QNX4_SHORT_NAME_MAX;
50 }
51 /* "" means "." ---> so paths like "/usr/lib//libc.a" work */
52 if (!len && (de->di_fname[0] == '.') && (de->di_fname[1] == '\0')) {
53 return 1;
54 }
55 thislen = strlen( de->di_fname );
56 if ( thislen > namelen )
57 thislen = namelen;
58 if (len != thislen) {
59 return 0;
60 }
61 if (strncmp(name, de->di_fname, len) == 0) {
62 if ((de->di_status & (QNX4_FILE_USED|QNX4_FILE_LINK)) != 0) {
63 return 1;
64 }
65 }
66 return 0;
67}
68
69static struct buffer_head *qnx4_find_entry(int len, struct inode *dir,
70 const char *name, struct qnx4_inode_entry **res_dir, int *ino)
71{
72 unsigned long block, offset, blkofs;
73 struct buffer_head *bh;
74
75 *res_dir = NULL;
76 if (!dir->i_sb) {
77 printk("qnx4: no superblock on dir.\n");
78 return NULL;
79 }
80 bh = NULL;
81 block = offset = blkofs = 0;
82 while (blkofs * QNX4_BLOCK_SIZE + offset < dir->i_size) {
83 if (!bh) {
84 bh = qnx4_bread(dir, blkofs, 0);
85 if (!bh) {
86 blkofs++;
87 continue;
88 }
89 }
90 *res_dir = (struct qnx4_inode_entry *) (bh->b_data + offset);
91 if (qnx4_match(len, name, bh, &offset)) {
92 block = qnx4_block_map( dir, blkofs );
93 *ino = block * QNX4_INODES_PER_BLOCK +
94 (offset / QNX4_DIR_ENTRY_SIZE) - 1;
95 return bh;
96 }
97 if (offset < bh->b_size) {
98 continue;
99 }
100 brelse(bh);
101 bh = NULL;
102 offset = 0;
103 blkofs++;
104 }
105 brelse(bh);
106 *res_dir = NULL;
107 return NULL;
108}
109
110struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
111{
112 int ino;
113 struct qnx4_inode_entry *de;
114 struct qnx4_link_info *lnk;
115 struct buffer_head *bh;
116 const char *name = dentry->d_name.name;
117 int len = dentry->d_name.len;
118 struct inode *foundinode = NULL;
119
120 lock_kernel();
121 if (!(bh = qnx4_find_entry(len, dir, name, &de, &ino)))
122 goto out;
123 /* The entry is linked, let's get the real info */
124 if ((de->di_status & QNX4_FILE_LINK) == QNX4_FILE_LINK) {
125 lnk = (struct qnx4_link_info *) de;
126 ino = (le32_to_cpu(lnk->dl_inode_blk) - 1) *
127 QNX4_INODES_PER_BLOCK +
128 lnk->dl_inode_ndx;
129 }
130 brelse(bh);
131
132 if ((foundinode = iget(dir->i_sb, ino)) == NULL) {
133 unlock_kernel();
134 QNX4DEBUG(("qnx4: lookup->iget -> NULL\n"));
135 return ERR_PTR(-EACCES);
136 }
137out:
138 unlock_kernel();
139 d_add(dentry, foundinode);
140
141 return NULL;
142}
143
144#ifdef CONFIG_QNX4FS_RW
145int qnx4_create(struct inode *dir, struct dentry *dentry, int mode,
146 struct nameidata *nd)
147{
148 QNX4DEBUG(("qnx4: qnx4_create\n"));
149 if (dir == NULL) {
150 return -ENOENT;
151 }
152 return -ENOSPC;
153}
154
155int qnx4_rmdir(struct inode *dir, struct dentry *dentry)
156{
157 struct buffer_head *bh;
158 struct qnx4_inode_entry *de;
159 struct inode *inode;
160 int retval;
161 int ino;
162
163 QNX4DEBUG(("qnx4: qnx4_rmdir [%s]\n", dentry->d_name.name));
164 lock_kernel();
165 bh = qnx4_find_entry(dentry->d_name.len, dir, dentry->d_name.name,
166 &de, &ino);
167 if (bh == NULL) {
168 unlock_kernel();
169 return -ENOENT;
170 }
171 inode = dentry->d_inode;
172 if (inode->i_ino != ino) {
173 retval = -EIO;
174 goto end_rmdir;
175 }
176#if 0
177 if (!empty_dir(inode)) {
178 retval = -ENOTEMPTY;
179 goto end_rmdir;
180 }
181#endif
182 if (inode->i_nlink != 2) {
183 QNX4DEBUG(("empty directory has nlink!=2 (%d)\n", inode->i_nlink));
184 }
185 QNX4DEBUG(("qnx4: deleting directory\n"));
186 de->di_status = 0;
187 memset(de->di_fname, 0, sizeof de->di_fname);
188 de->di_mode = 0;
189 mark_buffer_dirty(bh);
190 inode->i_nlink = 0;
191 mark_inode_dirty(inode);
192 inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
193 dir->i_nlink--;
194 mark_inode_dirty(dir);
195 retval = 0;
196
197 end_rmdir:
198 brelse(bh);
199
200 unlock_kernel();
201 return retval;
202}
203
204int qnx4_unlink(struct inode *dir, struct dentry *dentry)
205{
206 struct buffer_head *bh;
207 struct qnx4_inode_entry *de;
208 struct inode *inode;
209 int retval;
210 int ino;
211
212 QNX4DEBUG(("qnx4: qnx4_unlink [%s]\n", dentry->d_name.name));
213 lock_kernel();
214 bh = qnx4_find_entry(dentry->d_name.len, dir, dentry->d_name.name,
215 &de, &ino);
216 if (bh == NULL) {
217 unlock_kernel();
218 return -ENOENT;
219 }
220 inode = dentry->d_inode;
221 if (inode->i_ino != ino) {
222 retval = -EIO;
223 goto end_unlink;
224 }
225 retval = -EPERM;
226 if (!inode->i_nlink) {
227 QNX4DEBUG(("Deleting nonexistent file (%s:%lu), %d\n",
228 inode->i_sb->s_id,
229 inode->i_ino, inode->i_nlink));
230 inode->i_nlink = 1;
231 }
232 de->di_status = 0;
233 memset(de->di_fname, 0, sizeof de->di_fname);
234 de->di_mode = 0;
235 mark_buffer_dirty(bh);
236 dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
237 mark_inode_dirty(dir);
238 inode->i_nlink--;
239 inode->i_ctime = dir->i_ctime;
240 mark_inode_dirty(inode);
241 retval = 0;
242
243end_unlink:
244 unlock_kernel();
245 brelse(bh);
246
247 return retval;
248}
249#endif
diff --git a/fs/qnx4/truncate.c b/fs/qnx4/truncate.c
new file mode 100644
index 000000000000..86563ec01b39
--- /dev/null
+++ b/fs/qnx4/truncate.c
@@ -0,0 +1,39 @@
1/*
2 * QNX4 file system, Linux implementation.
3 *
4 * Version : 0.1
5 *
6 * Using parts of the xiafs filesystem.
7 *
8 * History :
9 *
10 * 30-06-1998 by Frank DENIS : ugly filler.
11 */
12
13#include <linux/config.h>
14#include <linux/types.h>
15#include <linux/errno.h>
16#include <linux/fs.h>
17#include <linux/qnx4_fs.h>
18#include <linux/smp_lock.h>
19#include <asm/uaccess.h>
20
21#ifdef CONFIG_QNX4FS_RW
22
23void qnx4_truncate(struct inode *inode)
24{
25 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
26 S_ISLNK(inode->i_mode))) {
27 return;
28 }
29 lock_kernel();
30 if (!(S_ISDIR(inode->i_mode))) {
31 /* TODO */
32 }
33 QNX4DEBUG(("qnx4: qnx4_truncate called\n"));
34 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
35 mark_inode_dirty(inode);
36 unlock_kernel();
37}
38
39#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-20 08:22:13 -0400