*
* Steve Beynon : Missing last directory entries fixed
* (stephen@askone.demon.co.uk) : 21st June 1996
- *
+ *
* isofs directory handling functions
*/
-#include <linux/config.h>
#include <linux/smp_lock.h>
#include "isofs.h"
-static int isofs_readdir(struct file *, void *, filldir_t);
-
-struct file_operations isofs_dir_operations =
-{
- .read = generic_read_dir,
- .readdir = isofs_readdir,
-};
-
-/*
- * directories can handle most operations...
- */
-struct inode_operations isofs_dir_inode_operations =
-{
- .lookup = isofs_lookup,
-};
-
int isofs_name_translate(struct iso_directory_record *de, char *new, struct inode *inode)
{
char * old = de->name;
int len = de->name_len[0];
int i;
-
+
for (i = 0; i < len; i++) {
unsigned char c = old[i];
if (!c)
}
/* Acorn extensions written by Matthew Wilcox <willy@bofh.ai> 1998 */
-int get_acorn_filename(struct iso_directory_record * de,
- char * retname, struct inode * inode)
+int get_acorn_filename(struct iso_directory_record *de,
+ char *retname, struct inode *inode)
{
int std;
- unsigned char * chr;
+ unsigned char *chr;
int retnamlen = isofs_name_translate(de, retname, inode);
- if (retnamlen == 0) return 0;
+
+ if (retnamlen == 0)
+ return 0;
std = sizeof(struct iso_directory_record) + de->name_len[0];
- if (std & 1) std++;
- if ((*((unsigned char *) de) - std) != 32) return retnamlen;
+ if (std & 1)
+ std++;
+ if ((*((unsigned char *) de) - std) != 32)
+ return retnamlen;
chr = ((unsigned char *) de) + std;
- if (strncmp(chr, "ARCHIMEDES", 10)) return retnamlen;
- if ((*retname == '_') && ((chr[19] & 1) == 1)) *retname = '!';
+ if (strncmp(chr, "ARCHIMEDES", 10))
+ return retnamlen;
+ if ((*retname == '_') && ((chr[19] & 1) == 1))
+ *retname = '!';
if (((de->flags[0] & 2) == 0) && (chr[13] == 0xff)
- && ((chr[12] & 0xf0) == 0xf0))
- {
+ && ((chr[12] & 0xf0) == 0xf0)) {
retname[retnamlen] = ',';
sprintf(retname+retnamlen+1, "%3.3x",
((chr[12] & 0xf) << 8) | chr[11]);
*/
static int do_isofs_readdir(struct inode *inode, struct file *filp,
void *dirent, filldir_t filldir,
- char * tmpname, struct iso_directory_record * tmpde)
+ char *tmpname, struct iso_directory_record *tmpde)
{
unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
unsigned char bufbits = ISOFS_BUFFER_BITS(inode);
de_len = *(unsigned char *) de;
- /* If the length byte is zero, we should move on to the next
- CDROM sector. If we are at the end of the directory, we
- kick out of the while loop. */
+ /*
+ * If the length byte is zero, we should move on to the next
+ * CDROM sector. If we are at the end of the directory, we
+ * kick out of the while loop.
+ */
if (de_len == 0) {
brelse(bh);
}
de = tmpde;
}
+ /* Basic sanity check, whether name doesn't exceed dir entry */
+ if (de_len < de->name_len[0] +
+ sizeof(struct iso_directory_record)) {
+ printk(KERN_NOTICE "iso9660: Corrupted directory entry"
+ " in block %lu of inode %lu\n", block,
+ inode->i_ino);
+ return -EIO;
+ }
if (first_de) {
isofs_normalize_block_and_offset(de,
- &block_saved,
- &offset_saved);
+ &block_saved,
+ &offset_saved);
inode_number = isofs_get_ino(block_saved,
- offset_saved,
- bufbits);
+ offset_saved, bufbits);
}
if (de->flags[-sbi->s_high_sierra] & 0x80) {
/* Handle the case of the '..' directory */
if (de->name_len[0] == 1 && de->name[0] == 1) {
- inode_number = parent_ino(filp->f_dentry);
+ inode_number = parent_ino(filp->f_path.dentry);
if (filldir(dirent, "..", 2, filp->f_pos, inode_number, DT_DIR) < 0)
break;
filp->f_pos += de_len;
/* Handle everything else. Do name translation if there
is no Rock Ridge NM field. */
- if (sbi->s_unhide == 'n') {
- /* Do not report hidden or associated files */
- if (de->flags[-sbi->s_high_sierra] & 5) {
- filp->f_pos += de_len;
- continue;
- }
+
+ /*
+ * Do not report hidden files if so instructed, or associated
+ * files unless instructed to do so
+ */
+ if ((sbi->s_hide == 'y' &&
+ (de->flags[-sbi->s_high_sierra] & 1)) ||
+ (sbi->s_showassoc =='n' &&
+ (de->flags[-sbi->s_high_sierra] & 4))) {
+ filp->f_pos += de_len;
+ continue;
}
map = 1;
continue;
}
- if (bh) brelse(bh);
+ if (bh)
+ brelse(bh);
return 0;
}
void *dirent, filldir_t filldir)
{
int result;
- char * tmpname;
- struct iso_directory_record * tmpde;
- struct inode *inode = filp->f_dentry->d_inode;
-
+ char *tmpname;
+ struct iso_directory_record *tmpde;
+ struct inode *inode = filp->f_path.dentry->d_inode;
tmpname = (char *)__get_free_page(GFP_KERNEL);
if (tmpname == NULL)
unlock_kernel();
return result;
}
+
+const struct file_operations isofs_dir_operations =
+{
+ .read = generic_read_dir,
+ .readdir = isofs_readdir,
+};
+
+/*
+ * directories can handle most operations...
+ */
+const struct inode_operations isofs_dir_inode_operations =
+{
+ .lookup = isofs_lookup,
+};
+
+
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff