/*
|
/*
|
* linux/fs/isofs/rock.c
|
* linux/fs/isofs/rock.c
|
*
|
*
|
* (C) 1992, 1993 Eric Youngdale
|
* (C) 1992, 1993 Eric Youngdale
|
*
|
*
|
* Rock Ridge Extensions to iso9660
|
* Rock Ridge Extensions to iso9660
|
*/
|
*/
|
|
|
#include <linux/stat.h>
|
#include <linux/stat.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/iso_fs.h>
|
#include <linux/iso_fs.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/mm.h>
|
#include <linux/mm.h>
|
#include <linux/slab.h>
|
#include <linux/slab.h>
|
#include <linux/pagemap.h>
|
#include <linux/pagemap.h>
|
#include <linux/smp_lock.h>
|
#include <linux/smp_lock.h>
|
#include <asm/page.h>
|
#include <asm/page.h>
|
|
|
#include "rock.h"
|
#include "rock.h"
|
|
|
/* These functions are designed to read the system areas of a directory record
|
/* These functions are designed to read the system areas of a directory record
|
* and extract relevant information. There are different functions provided
|
* and extract relevant information. There are different functions provided
|
* depending upon what information we need at the time. One function fills
|
* depending upon what information we need at the time. One function fills
|
* out an inode structure, a second one extracts a filename, a third one
|
* out an inode structure, a second one extracts a filename, a third one
|
* returns a symbolic link name, and a fourth one returns the extent number
|
* returns a symbolic link name, and a fourth one returns the extent number
|
* for the file. */
|
* for the file. */
|
|
|
#define SIG(A,B) ((A) | ((B) << 8)) /* isonum_721() */
|
#define SIG(A,B) ((A) | ((B) << 8)) /* isonum_721() */
|
|
|
|
|
/* This is a way of ensuring that we have something in the system
|
/* This is a way of ensuring that we have something in the system
|
use fields that is compatible with Rock Ridge */
|
use fields that is compatible with Rock Ridge */
|
#define CHECK_SP(FAIL) \
|
#define CHECK_SP(FAIL) \
|
if(rr->u.SP.magic[0] != 0xbe) FAIL; \
|
if(rr->u.SP.magic[0] != 0xbe) FAIL; \
|
if(rr->u.SP.magic[1] != 0xef) FAIL; \
|
if(rr->u.SP.magic[1] != 0xef) FAIL; \
|
inode->i_sb->u.isofs_sb.s_rock_offset=rr->u.SP.skip;
|
inode->i_sb->u.isofs_sb.s_rock_offset=rr->u.SP.skip;
|
/* We define a series of macros because each function must do exactly the
|
/* We define a series of macros because each function must do exactly the
|
same thing in certain places. We use the macros to ensure that everything
|
same thing in certain places. We use the macros to ensure that everything
|
is done correctly */
|
is done correctly */
|
|
|
#define CONTINUE_DECLS \
|
#define CONTINUE_DECLS \
|
int cont_extent = 0, cont_offset = 0, cont_size = 0; \
|
int cont_extent = 0, cont_offset = 0, cont_size = 0; \
|
void * buffer = 0
|
void * buffer = 0
|
|
|
#define CHECK_CE \
|
#define CHECK_CE \
|
{cont_extent = isonum_733(rr->u.CE.extent); \
|
{cont_extent = isonum_733(rr->u.CE.extent); \
|
cont_offset = isonum_733(rr->u.CE.offset); \
|
cont_offset = isonum_733(rr->u.CE.offset); \
|
cont_size = isonum_733(rr->u.CE.size);}
|
cont_size = isonum_733(rr->u.CE.size);}
|
|
|
#define SETUP_ROCK_RIDGE(DE,CHR,LEN) \
|
#define SETUP_ROCK_RIDGE(DE,CHR,LEN) \
|
{LEN= sizeof(struct iso_directory_record) + DE->name_len[0]; \
|
{LEN= sizeof(struct iso_directory_record) + DE->name_len[0]; \
|
if(LEN & 1) LEN++; \
|
if(LEN & 1) LEN++; \
|
CHR = ((unsigned char *) DE) + LEN; \
|
CHR = ((unsigned char *) DE) + LEN; \
|
LEN = *((unsigned char *) DE) - LEN; \
|
LEN = *((unsigned char *) DE) - LEN; \
|
if (inode->i_sb->u.isofs_sb.s_rock_offset!=-1) \
|
if (inode->i_sb->u.isofs_sb.s_rock_offset!=-1) \
|
{ \
|
{ \
|
LEN-=inode->i_sb->u.isofs_sb.s_rock_offset; \
|
LEN-=inode->i_sb->u.isofs_sb.s_rock_offset; \
|
CHR+=inode->i_sb->u.isofs_sb.s_rock_offset; \
|
CHR+=inode->i_sb->u.isofs_sb.s_rock_offset; \
|
if (LEN<0) LEN=0; \
|
if (LEN<0) LEN=0; \
|
} \
|
} \
|
}
|
}
|
|
|
#define MAYBE_CONTINUE(LABEL,DEV) \
|
#define MAYBE_CONTINUE(LABEL,DEV) \
|
{if (buffer) kfree(buffer); \
|
{if (buffer) kfree(buffer); \
|
if (cont_extent){ \
|
if (cont_extent){ \
|
int block, offset, offset1; \
|
int block, offset, offset1; \
|
struct buffer_head * pbh; \
|
struct buffer_head * pbh; \
|
buffer = kmalloc(cont_size,GFP_KERNEL); \
|
buffer = kmalloc(cont_size,GFP_KERNEL); \
|
if (!buffer) goto out; \
|
if (!buffer) goto out; \
|
block = cont_extent; \
|
block = cont_extent; \
|
offset = cont_offset; \
|
offset = cont_offset; \
|
offset1 = 0; \
|
offset1 = 0; \
|
pbh = sb_bread(DEV->i_sb, block); \
|
pbh = sb_bread(DEV->i_sb, block); \
|
if(pbh){ \
|
if(pbh){ \
|
memcpy(buffer + offset1, pbh->b_data + offset, cont_size - offset1); \
|
memcpy(buffer + offset1, pbh->b_data + offset, cont_size - offset1); \
|
brelse(pbh); \
|
brelse(pbh); \
|
chr = (unsigned char *) buffer; \
|
chr = (unsigned char *) buffer; \
|
len = cont_size; \
|
len = cont_size; \
|
cont_extent = 0; \
|
cont_extent = 0; \
|
cont_size = 0; \
|
cont_size = 0; \
|
cont_offset = 0; \
|
cont_offset = 0; \
|
goto LABEL; \
|
goto LABEL; \
|
} \
|
} \
|
printk("Unable to read rock-ridge attributes\n"); \
|
printk("Unable to read rock-ridge attributes\n"); \
|
}}
|
}}
|
|
|
/* This is the inner layer of the get filename routine, and is called
|
/* This is the inner layer of the get filename routine, and is called
|
for each system area and continuation record related to the file */
|
for each system area and continuation record related to the file */
|
|
|
int find_rock_ridge_relocation(struct iso_directory_record * de,
|
int find_rock_ridge_relocation(struct iso_directory_record * de,
|
struct inode * inode) {
|
struct inode * inode) {
|
int flag;
|
int flag;
|
int len;
|
int len;
|
int retval;
|
int retval;
|
unsigned char * chr;
|
unsigned char * chr;
|
CONTINUE_DECLS;
|
CONTINUE_DECLS;
|
flag = 0;
|
flag = 0;
|
|
|
/* If this is a '..' then we are looking for the parent, otherwise we
|
/* If this is a '..' then we are looking for the parent, otherwise we
|
are looking for the child */
|
are looking for the child */
|
|
|
if (de->name[0]==1 && de->name_len[0]==1) flag = 1;
|
if (de->name[0]==1 && de->name_len[0]==1) flag = 1;
|
/* Return value if we do not find appropriate record. */
|
/* Return value if we do not find appropriate record. */
|
retval = isonum_733 (de->extent);
|
retval = isonum_733 (de->extent);
|
|
|
if (!inode->i_sb->u.isofs_sb.s_rock) return retval;
|
if (!inode->i_sb->u.isofs_sb.s_rock) return retval;
|
|
|
SETUP_ROCK_RIDGE(de, chr, len);
|
SETUP_ROCK_RIDGE(de, chr, len);
|
repeat:
|
repeat:
|
{
|
{
|
int rrflag, sig;
|
int rrflag, sig;
|
struct rock_ridge * rr;
|
struct rock_ridge * rr;
|
|
|
while (len > 1){ /* There may be one byte for padding somewhere */
|
while (len > 1){ /* There may be one byte for padding somewhere */
|
rr = (struct rock_ridge *) chr;
|
rr = (struct rock_ridge *) chr;
|
if (rr->len == 0) goto out; /* Something got screwed up here */
|
if (rr->len == 0) goto out; /* Something got screwed up here */
|
sig = isonum_721(chr);
|
sig = isonum_721(chr);
|
chr += rr->len;
|
chr += rr->len;
|
len -= rr->len;
|
len -= rr->len;
|
|
|
switch(sig){
|
switch(sig){
|
case SIG('R','R'):
|
case SIG('R','R'):
|
rrflag = rr->u.RR.flags[0];
|
rrflag = rr->u.RR.flags[0];
|
if (flag && !(rrflag & RR_PL)) goto out;
|
if (flag && !(rrflag & RR_PL)) goto out;
|
if (!flag && !(rrflag & RR_CL)) goto out;
|
if (!flag && !(rrflag & RR_CL)) goto out;
|
break;
|
break;
|
case SIG('S','P'):
|
case SIG('S','P'):
|
CHECK_SP(goto out);
|
CHECK_SP(goto out);
|
break;
|
break;
|
case SIG('C','L'):
|
case SIG('C','L'):
|
if (flag == 0) {
|
if (flag == 0) {
|
retval = isonum_733(rr->u.CL.location);
|
retval = isonum_733(rr->u.CL.location);
|
goto out;
|
goto out;
|
}
|
}
|
break;
|
break;
|
case SIG('P','L'):
|
case SIG('P','L'):
|
if (flag != 0) {
|
if (flag != 0) {
|
retval = isonum_733(rr->u.PL.location);
|
retval = isonum_733(rr->u.PL.location);
|
goto out;
|
goto out;
|
}
|
}
|
break;
|
break;
|
case SIG('C','E'):
|
case SIG('C','E'):
|
CHECK_CE; /* This tells is if there is a continuation record */
|
CHECK_CE; /* This tells is if there is a continuation record */
|
break;
|
break;
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
MAYBE_CONTINUE(repeat, inode);
|
MAYBE_CONTINUE(repeat, inode);
|
return retval;
|
return retval;
|
out:
|
out:
|
if(buffer) kfree(buffer);
|
if(buffer) kfree(buffer);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/* return length of name field; 0: not found, -1: to be ignored */
|
/* return length of name field; 0: not found, -1: to be ignored */
|
int get_rock_ridge_filename(struct iso_directory_record * de,
|
int get_rock_ridge_filename(struct iso_directory_record * de,
|
char * retname, struct inode * inode)
|
char * retname, struct inode * inode)
|
{
|
{
|
int len;
|
int len;
|
unsigned char * chr;
|
unsigned char * chr;
|
CONTINUE_DECLS;
|
CONTINUE_DECLS;
|
int retnamlen = 0, truncate=0;
|
int retnamlen = 0, truncate=0;
|
|
|
if (!inode->i_sb->u.isofs_sb.s_rock) return 0;
|
if (!inode->i_sb->u.isofs_sb.s_rock) return 0;
|
*retname = 0;
|
*retname = 0;
|
|
|
SETUP_ROCK_RIDGE(de, chr, len);
|
SETUP_ROCK_RIDGE(de, chr, len);
|
repeat:
|
repeat:
|
{
|
{
|
struct rock_ridge * rr;
|
struct rock_ridge * rr;
|
int sig;
|
int sig;
|
|
|
while (len > 1){ /* There may be one byte for padding somewhere */
|
while (len > 1){ /* There may be one byte for padding somewhere */
|
rr = (struct rock_ridge *) chr;
|
rr = (struct rock_ridge *) chr;
|
if (rr->len == 0) goto out; /* Something got screwed up here */
|
if (rr->len == 0) goto out; /* Something got screwed up here */
|
sig = isonum_721(chr);
|
sig = isonum_721(chr);
|
chr += rr->len;
|
chr += rr->len;
|
len -= rr->len;
|
len -= rr->len;
|
|
|
switch(sig){
|
switch(sig){
|
case SIG('R','R'):
|
case SIG('R','R'):
|
if((rr->u.RR.flags[0] & RR_NM) == 0) goto out;
|
if((rr->u.RR.flags[0] & RR_NM) == 0) goto out;
|
break;
|
break;
|
case SIG('S','P'):
|
case SIG('S','P'):
|
CHECK_SP(goto out);
|
CHECK_SP(goto out);
|
break;
|
break;
|
case SIG('C','E'):
|
case SIG('C','E'):
|
CHECK_CE;
|
CHECK_CE;
|
break;
|
break;
|
case SIG('N','M'):
|
case SIG('N','M'):
|
if (truncate) break;
|
if (truncate) break;
|
/*
|
/*
|
* If the flags are 2 or 4, this indicates '.' or '..'.
|
* If the flags are 2 or 4, this indicates '.' or '..'.
|
* We don't want to do anything with this, because it
|
* We don't want to do anything with this, because it
|
* screws up the code that calls us. We don't really
|
* screws up the code that calls us. We don't really
|
* care anyways, since we can just use the non-RR
|
* care anyways, since we can just use the non-RR
|
* name.
|
* name.
|
*/
|
*/
|
if (rr->u.NM.flags & 6) {
|
if (rr->u.NM.flags & 6) {
|
break;
|
break;
|
}
|
}
|
|
|
if (rr->u.NM.flags & ~1) {
|
if (rr->u.NM.flags & ~1) {
|
printk("Unsupported NM flag settings (%d)\n",rr->u.NM.flags);
|
printk("Unsupported NM flag settings (%d)\n",rr->u.NM.flags);
|
break;
|
break;
|
}
|
}
|
if((strlen(retname) + rr->len - 5) >= 254) {
|
if((strlen(retname) + rr->len - 5) >= 254) {
|
truncate = 1;
|
truncate = 1;
|
break;
|
break;
|
}
|
}
|
strncat(retname, rr->u.NM.name, rr->len - 5);
|
strncat(retname, rr->u.NM.name, rr->len - 5);
|
retnamlen += rr->len - 5;
|
retnamlen += rr->len - 5;
|
break;
|
break;
|
case SIG('R','E'):
|
case SIG('R','E'):
|
if (buffer) kfree(buffer);
|
if (buffer) kfree(buffer);
|
return -1;
|
return -1;
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
MAYBE_CONTINUE(repeat,inode);
|
MAYBE_CONTINUE(repeat,inode);
|
return retnamlen; /* If 0, this file did not have a NM field */
|
return retnamlen; /* If 0, this file did not have a NM field */
|
out:
|
out:
|
if(buffer) kfree(buffer);
|
if(buffer) kfree(buffer);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
int parse_rock_ridge_inode_internal(struct iso_directory_record * de,
|
int parse_rock_ridge_inode_internal(struct iso_directory_record * de,
|
struct inode * inode,int regard_xa){
|
struct inode * inode,int regard_xa){
|
int len;
|
int len;
|
unsigned char * chr;
|
unsigned char * chr;
|
int symlink_len = 0;
|
int symlink_len = 0;
|
CONTINUE_DECLS;
|
CONTINUE_DECLS;
|
|
|
if (!inode->i_sb->u.isofs_sb.s_rock) return 0;
|
if (!inode->i_sb->u.isofs_sb.s_rock) return 0;
|
|
|
SETUP_ROCK_RIDGE(de, chr, len);
|
SETUP_ROCK_RIDGE(de, chr, len);
|
if (regard_xa)
|
if (regard_xa)
|
{
|
{
|
chr+=14;
|
chr+=14;
|
len-=14;
|
len-=14;
|
if (len<0) len=0;
|
if (len<0) len=0;
|
};
|
};
|
|
|
repeat:
|
repeat:
|
{
|
{
|
int cnt, sig;
|
int cnt, sig;
|
struct inode * reloc;
|
struct inode * reloc;
|
struct rock_ridge * rr;
|
struct rock_ridge * rr;
|
int rootflag;
|
int rootflag;
|
|
|
while (len > 1){ /* There may be one byte for padding somewhere */
|
while (len > 1){ /* There may be one byte for padding somewhere */
|
rr = (struct rock_ridge *) chr;
|
rr = (struct rock_ridge *) chr;
|
if (rr->len == 0) goto out; /* Something got screwed up here */
|
if (rr->len == 0) goto out; /* Something got screwed up here */
|
sig = isonum_721(chr);
|
sig = isonum_721(chr);
|
chr += rr->len;
|
chr += rr->len;
|
len -= rr->len;
|
len -= rr->len;
|
|
|
switch(sig){
|
switch(sig){
|
#ifndef CONFIG_ZISOFS /* No flag for SF or ZF */
|
#ifndef CONFIG_ZISOFS /* No flag for SF or ZF */
|
case SIG('R','R'):
|
case SIG('R','R'):
|
if((rr->u.RR.flags[0] &
|
if((rr->u.RR.flags[0] &
|
(RR_PX | RR_TF | RR_SL | RR_CL)) == 0) goto out;
|
(RR_PX | RR_TF | RR_SL | RR_CL)) == 0) goto out;
|
break;
|
break;
|
#endif
|
#endif
|
case SIG('S','P'):
|
case SIG('S','P'):
|
CHECK_SP(goto out);
|
CHECK_SP(goto out);
|
break;
|
break;
|
case SIG('C','E'):
|
case SIG('C','E'):
|
CHECK_CE;
|
CHECK_CE;
|
break;
|
break;
|
case SIG('E','R'):
|
case SIG('E','R'):
|
inode->i_sb->u.isofs_sb.s_rock = 1;
|
inode->i_sb->u.isofs_sb.s_rock = 1;
|
printk(KERN_DEBUG "ISO 9660 Extensions: ");
|
printk(KERN_DEBUG "ISO 9660 Extensions: ");
|
{ int p;
|
{ int p;
|
for(p=0;p<rr->u.ER.len_id;p++) printk("%c",rr->u.ER.data[p]);
|
for(p=0;p<rr->u.ER.len_id;p++) printk("%c",rr->u.ER.data[p]);
|
}
|
}
|
printk("\n");
|
printk("\n");
|
break;
|
break;
|
case SIG('P','X'):
|
case SIG('P','X'):
|
inode->i_mode = isonum_733(rr->u.PX.mode);
|
inode->i_mode = isonum_733(rr->u.PX.mode);
|
inode->i_nlink = isonum_733(rr->u.PX.n_links);
|
inode->i_nlink = isonum_733(rr->u.PX.n_links);
|
inode->i_uid = isonum_733(rr->u.PX.uid);
|
inode->i_uid = isonum_733(rr->u.PX.uid);
|
inode->i_gid = isonum_733(rr->u.PX.gid);
|
inode->i_gid = isonum_733(rr->u.PX.gid);
|
break;
|
break;
|
case SIG('P','N'):
|
case SIG('P','N'):
|
{ int high, low;
|
{ int high, low;
|
high = isonum_733(rr->u.PN.dev_high);
|
high = isonum_733(rr->u.PN.dev_high);
|
low = isonum_733(rr->u.PN.dev_low);
|
low = isonum_733(rr->u.PN.dev_low);
|
/*
|
/*
|
* The Rock Ridge standard specifies that if sizeof(dev_t) <= 4,
|
* The Rock Ridge standard specifies that if sizeof(dev_t) <= 4,
|
* then the high field is unused, and the device number is completely
|
* then the high field is unused, and the device number is completely
|
* stored in the low field. Some writers may ignore this subtlety,
|
* stored in the low field. Some writers may ignore this subtlety,
|
* and as a result we test to see if the entire device number is
|
* and as a result we test to see if the entire device number is
|
* stored in the low field, and use that.
|
* stored in the low field, and use that.
|
*/
|
*/
|
if((low & ~0xff) && high == 0) {
|
if((low & ~0xff) && high == 0) {
|
inode->i_rdev = MKDEV(low >> 8, low & 0xff);
|
inode->i_rdev = MKDEV(low >> 8, low & 0xff);
|
} else {
|
} else {
|
inode->i_rdev = MKDEV(high, low);
|
inode->i_rdev = MKDEV(high, low);
|
}
|
}
|
}
|
}
|
break;
|
break;
|
case SIG('T','F'):
|
case SIG('T','F'):
|
/* Some RRIP writers incorrectly place ctime in the TF_CREATE field.
|
/* Some RRIP writers incorrectly place ctime in the TF_CREATE field.
|
Try to handle this correctly for either case. */
|
Try to handle this correctly for either case. */
|
cnt = 0; /* Rock ridge never appears on a High Sierra disk */
|
cnt = 0; /* Rock ridge never appears on a High Sierra disk */
|
if(rr->u.TF.flags & TF_CREATE)
|
if(rr->u.TF.flags & TF_CREATE)
|
inode->i_ctime = iso_date(rr->u.TF.times[cnt++].time, 0);
|
inode->i_ctime = iso_date(rr->u.TF.times[cnt++].time, 0);
|
if(rr->u.TF.flags & TF_MODIFY)
|
if(rr->u.TF.flags & TF_MODIFY)
|
inode->i_mtime = iso_date(rr->u.TF.times[cnt++].time, 0);
|
inode->i_mtime = iso_date(rr->u.TF.times[cnt++].time, 0);
|
if(rr->u.TF.flags & TF_ACCESS)
|
if(rr->u.TF.flags & TF_ACCESS)
|
inode->i_atime = iso_date(rr->u.TF.times[cnt++].time, 0);
|
inode->i_atime = iso_date(rr->u.TF.times[cnt++].time, 0);
|
if(rr->u.TF.flags & TF_ATTRIBUTES)
|
if(rr->u.TF.flags & TF_ATTRIBUTES)
|
inode->i_ctime = iso_date(rr->u.TF.times[cnt++].time, 0);
|
inode->i_ctime = iso_date(rr->u.TF.times[cnt++].time, 0);
|
break;
|
break;
|
case SIG('S','L'):
|
case SIG('S','L'):
|
{int slen;
|
{int slen;
|
struct SL_component * slp;
|
struct SL_component * slp;
|
struct SL_component * oldslp;
|
struct SL_component * oldslp;
|
slen = rr->len - 5;
|
slen = rr->len - 5;
|
slp = &rr->u.SL.link;
|
slp = &rr->u.SL.link;
|
inode->i_size = symlink_len;
|
inode->i_size = symlink_len;
|
while (slen > 1){
|
while (slen > 1){
|
rootflag = 0;
|
rootflag = 0;
|
switch(slp->flags &~1){
|
switch(slp->flags &~1){
|
case 0:
|
case 0:
|
inode->i_size += slp->len;
|
inode->i_size += slp->len;
|
break;
|
break;
|
case 2:
|
case 2:
|
inode->i_size += 1;
|
inode->i_size += 1;
|
break;
|
break;
|
case 4:
|
case 4:
|
inode->i_size += 2;
|
inode->i_size += 2;
|
break;
|
break;
|
case 8:
|
case 8:
|
rootflag = 1;
|
rootflag = 1;
|
inode->i_size += 1;
|
inode->i_size += 1;
|
break;
|
break;
|
default:
|
default:
|
printk("Symlink component flag not implemented\n");
|
printk("Symlink component flag not implemented\n");
|
}
|
}
|
slen -= slp->len + 2;
|
slen -= slp->len + 2;
|
oldslp = slp;
|
oldslp = slp;
|
slp = (struct SL_component *) (((char *) slp) + slp->len + 2);
|
slp = (struct SL_component *) (((char *) slp) + slp->len + 2);
|
|
|
if(slen < 2) {
|
if(slen < 2) {
|
if( ((rr->u.SL.flags & 1) != 0)
|
if( ((rr->u.SL.flags & 1) != 0)
|
&& ((oldslp->flags & 1) == 0) ) inode->i_size += 1;
|
&& ((oldslp->flags & 1) == 0) ) inode->i_size += 1;
|
break;
|
break;
|
}
|
}
|
|
|
/*
|
/*
|
* If this component record isn't continued, then append a '/'.
|
* If this component record isn't continued, then append a '/'.
|
*/
|
*/
|
if (!rootflag && (oldslp->flags & 1) == 0)
|
if (!rootflag && (oldslp->flags & 1) == 0)
|
inode->i_size += 1;
|
inode->i_size += 1;
|
}
|
}
|
}
|
}
|
symlink_len = inode->i_size;
|
symlink_len = inode->i_size;
|
break;
|
break;
|
case SIG('R','E'):
|
case SIG('R','E'):
|
printk(KERN_WARNING "Attempt to read inode for relocated directory\n");
|
printk(KERN_WARNING "Attempt to read inode for relocated directory\n");
|
goto out;
|
goto out;
|
case SIG('C','L'):
|
case SIG('C','L'):
|
inode->u.isofs_i.i_first_extent = isonum_733(rr->u.CL.location);
|
inode->u.isofs_i.i_first_extent = isonum_733(rr->u.CL.location);
|
reloc = iget(inode->i_sb,
|
reloc = iget(inode->i_sb,
|
(inode->u.isofs_i.i_first_extent <<
|
(inode->u.isofs_i.i_first_extent <<
|
inode -> i_sb -> u.isofs_sb.s_log_zone_size));
|
inode -> i_sb -> u.isofs_sb.s_log_zone_size));
|
if (!reloc)
|
if (!reloc)
|
goto out;
|
goto out;
|
inode->i_mode = reloc->i_mode;
|
inode->i_mode = reloc->i_mode;
|
inode->i_nlink = reloc->i_nlink;
|
inode->i_nlink = reloc->i_nlink;
|
inode->i_uid = reloc->i_uid;
|
inode->i_uid = reloc->i_uid;
|
inode->i_gid = reloc->i_gid;
|
inode->i_gid = reloc->i_gid;
|
inode->i_rdev = reloc->i_rdev;
|
inode->i_rdev = reloc->i_rdev;
|
inode->i_size = reloc->i_size;
|
inode->i_size = reloc->i_size;
|
inode->i_blocks = reloc->i_blocks;
|
inode->i_blocks = reloc->i_blocks;
|
inode->i_atime = reloc->i_atime;
|
inode->i_atime = reloc->i_atime;
|
inode->i_ctime = reloc->i_ctime;
|
inode->i_ctime = reloc->i_ctime;
|
inode->i_mtime = reloc->i_mtime;
|
inode->i_mtime = reloc->i_mtime;
|
iput(reloc);
|
iput(reloc);
|
break;
|
break;
|
#ifdef CONFIG_ZISOFS
|
#ifdef CONFIG_ZISOFS
|
case SIG('Z','F'):
|
case SIG('Z','F'):
|
if ( !inode->i_sb->u.isofs_sb.s_nocompress ) {
|
if ( !inode->i_sb->u.isofs_sb.s_nocompress ) {
|
int algo;
|
int algo;
|
algo = isonum_721(rr->u.ZF.algorithm);
|
algo = isonum_721(rr->u.ZF.algorithm);
|
if ( algo == SIG('p','z') ) {
|
if ( algo == SIG('p','z') ) {
|
int block_shift = isonum_711(&rr->u.ZF.parms[1]);
|
int block_shift = isonum_711(&rr->u.ZF.parms[1]);
|
if ( block_shift < PAGE_CACHE_SHIFT || block_shift > 17 ) {
|
if ( block_shift < PAGE_CACHE_SHIFT || block_shift > 17 ) {
|
printk(KERN_WARNING "isofs: Can't handle ZF block size of 2^%d\n", block_shift);
|
printk(KERN_WARNING "isofs: Can't handle ZF block size of 2^%d\n", block_shift);
|
} else {
|
} else {
|
/* Note: we don't change i_blocks here */
|
/* Note: we don't change i_blocks here */
|
inode->u.isofs_i.i_file_format = isofs_file_compressed;
|
inode->u.isofs_i.i_file_format = isofs_file_compressed;
|
/* Parameters to compression algorithm (header size, block size) */
|
/* Parameters to compression algorithm (header size, block size) */
|
inode->u.isofs_i.i_format_parm[0] = isonum_711(&rr->u.ZF.parms[0]);
|
inode->u.isofs_i.i_format_parm[0] = isonum_711(&rr->u.ZF.parms[0]);
|
inode->u.isofs_i.i_format_parm[1] = isonum_711(&rr->u.ZF.parms[1]);
|
inode->u.isofs_i.i_format_parm[1] = isonum_711(&rr->u.ZF.parms[1]);
|
inode->i_size = isonum_733(rr->u.ZF.real_size);
|
inode->i_size = isonum_733(rr->u.ZF.real_size);
|
}
|
}
|
} else {
|
} else {
|
printk(KERN_WARNING "isofs: Unknown ZF compression algorithm: %c%c\n",
|
printk(KERN_WARNING "isofs: Unknown ZF compression algorithm: %c%c\n",
|
rr->u.ZF.algorithm[0], rr->u.ZF.algorithm[1]);
|
rr->u.ZF.algorithm[0], rr->u.ZF.algorithm[1]);
|
}
|
}
|
}
|
}
|
break;
|
break;
|
#endif
|
#endif
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
MAYBE_CONTINUE(repeat,inode);
|
MAYBE_CONTINUE(repeat,inode);
|
return 0;
|
return 0;
|
out:
|
out:
|
if(buffer) kfree(buffer);
|
if(buffer) kfree(buffer);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static char *get_symlink_chunk(char *rpnt, struct rock_ridge *rr, char *plimit)
|
static char *get_symlink_chunk(char *rpnt, struct rock_ridge *rr, char *plimit)
|
{
|
{
|
int slen;
|
int slen;
|
int rootflag;
|
int rootflag;
|
struct SL_component *oldslp;
|
struct SL_component *oldslp;
|
struct SL_component *slp;
|
struct SL_component *slp;
|
slen = rr->len - 5;
|
slen = rr->len - 5;
|
slp = &rr->u.SL.link;
|
slp = &rr->u.SL.link;
|
while (slen > 1) {
|
while (slen > 1) {
|
rootflag = 0;
|
rootflag = 0;
|
switch (slp->flags & ~1) {
|
switch (slp->flags & ~1) {
|
case 0:
|
case 0:
|
if (slp->len > plimit - rpnt)
|
if (slp->len > plimit - rpnt)
|
return NULL;
|
return NULL;
|
memcpy(rpnt, slp->text, slp->len);
|
memcpy(rpnt, slp->text, slp->len);
|
rpnt+=slp->len;
|
rpnt+=slp->len;
|
break;
|
break;
|
case 2:
|
case 2:
|
if (rpnt >= plimit)
|
if (rpnt >= plimit)
|
return NULL;
|
return NULL;
|
*rpnt++='.';
|
*rpnt++='.';
|
break;
|
break;
|
case 4:
|
case 4:
|
if (2 > plimit - rpnt)
|
if (2 > plimit - rpnt)
|
return NULL;
|
return NULL;
|
*rpnt++='.';
|
*rpnt++='.';
|
*rpnt++='.';
|
*rpnt++='.';
|
break;
|
break;
|
case 8:
|
case 8:
|
if (rpnt >= plimit)
|
if (rpnt >= plimit)
|
return NULL;
|
return NULL;
|
rootflag = 1;
|
rootflag = 1;
|
*rpnt++='/';
|
*rpnt++='/';
|
break;
|
break;
|
default:
|
default:
|
printk("Symlink component flag not implemented (%d)\n",
|
printk("Symlink component flag not implemented (%d)\n",
|
slp->flags);
|
slp->flags);
|
}
|
}
|
slen -= slp->len + 2;
|
slen -= slp->len + 2;
|
oldslp = slp;
|
oldslp = slp;
|
slp = (struct SL_component *) ((char *) slp + slp->len + 2);
|
slp = (struct SL_component *) ((char *) slp + slp->len + 2);
|
|
|
if (slen < 2) {
|
if (slen < 2) {
|
/*
|
/*
|
* If there is another SL record, and this component
|
* If there is another SL record, and this component
|
* record isn't continued, then add a slash.
|
* record isn't continued, then add a slash.
|
*/
|
*/
|
if ((!rootflag) && (rr->u.SL.flags & 1) &&
|
if ((!rootflag) && (rr->u.SL.flags & 1) &&
|
!(oldslp->flags & 1)) {
|
!(oldslp->flags & 1)) {
|
if (rpnt >= plimit)
|
if (rpnt >= plimit)
|
return NULL;
|
return NULL;
|
*rpnt++='/';
|
*rpnt++='/';
|
}
|
}
|
break;
|
break;
|
}
|
}
|
|
|
/*
|
/*
|
* If this component record isn't continued, then append a '/'.
|
* If this component record isn't continued, then append a '/'.
|
*/
|
*/
|
if (!rootflag && !(oldslp->flags & 1)) {
|
if (!rootflag && !(oldslp->flags & 1)) {
|
if (rpnt >= plimit)
|
if (rpnt >= plimit)
|
return NULL;
|
return NULL;
|
*rpnt++='/';
|
*rpnt++='/';
|
}
|
}
|
}
|
}
|
return rpnt;
|
return rpnt;
|
}
|
}
|
|
|
int parse_rock_ridge_inode(struct iso_directory_record * de,
|
int parse_rock_ridge_inode(struct iso_directory_record * de,
|
struct inode * inode)
|
struct inode * inode)
|
{
|
{
|
int result=parse_rock_ridge_inode_internal(de,inode,0);
|
int result=parse_rock_ridge_inode_internal(de,inode,0);
|
/* if rockridge flag was reset and we didn't look for attributes
|
/* if rockridge flag was reset and we didn't look for attributes
|
* behind eventual XA attributes, have a look there */
|
* behind eventual XA attributes, have a look there */
|
if ((inode->i_sb->u.isofs_sb.s_rock_offset==-1)
|
if ((inode->i_sb->u.isofs_sb.s_rock_offset==-1)
|
&&(inode->i_sb->u.isofs_sb.s_rock==2))
|
&&(inode->i_sb->u.isofs_sb.s_rock==2))
|
{
|
{
|
result=parse_rock_ridge_inode_internal(de,inode,14);
|
result=parse_rock_ridge_inode_internal(de,inode,14);
|
};
|
};
|
return result;
|
return result;
|
};
|
};
|
|
|
/* readpage() for symlinks: reads symlink contents into the page and either
|
/* readpage() for symlinks: reads symlink contents into the page and either
|
makes it uptodate and returns 0 or returns error (-EIO) */
|
makes it uptodate and returns 0 or returns error (-EIO) */
|
|
|
static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
|
static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
|
{
|
{
|
struct inode *inode = page->mapping->host;
|
struct inode *inode = page->mapping->host;
|
char *link = kmap(page);
|
char *link = kmap(page);
|
unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
|
unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
|
unsigned char bufbits = ISOFS_BUFFER_BITS(inode);
|
unsigned char bufbits = ISOFS_BUFFER_BITS(inode);
|
struct buffer_head *bh;
|
struct buffer_head *bh;
|
char *rpnt = link;
|
char *rpnt = link;
|
unsigned char *pnt;
|
unsigned char *pnt;
|
struct iso_directory_record *raw_inode;
|
struct iso_directory_record *raw_inode;
|
CONTINUE_DECLS;
|
CONTINUE_DECLS;
|
int block;
|
int block;
|
int sig;
|
int sig;
|
int len;
|
int len;
|
unsigned char *chr;
|
unsigned char *chr;
|
struct rock_ridge *rr;
|
struct rock_ridge *rr;
|
|
|
if (!inode->i_sb->u.isofs_sb.s_rock)
|
if (!inode->i_sb->u.isofs_sb.s_rock)
|
panic ("Cannot have symlink with high sierra variant of iso filesystem\n");
|
panic ("Cannot have symlink with high sierra variant of iso filesystem\n");
|
|
|
block = inode->i_ino >> bufbits;
|
block = inode->i_ino >> bufbits;
|
lock_kernel();
|
lock_kernel();
|
bh = sb_bread(inode->i_sb, block);
|
bh = sb_bread(inode->i_sb, block);
|
if (!bh)
|
if (!bh)
|
goto out_noread;
|
goto out_noread;
|
|
|
pnt = (unsigned char *) bh->b_data + (inode->i_ino & (bufsize - 1));
|
pnt = (unsigned char *) bh->b_data + (inode->i_ino & (bufsize - 1));
|
|
|
raw_inode = (struct iso_directory_record *) pnt;
|
raw_inode = (struct iso_directory_record *) pnt;
|
|
|
/*
|
/*
|
* If we go past the end of the buffer, there is some sort of error.
|
* If we go past the end of the buffer, there is some sort of error.
|
*/
|
*/
|
if ((inode->i_ino & (bufsize - 1)) + *pnt > bufsize)
|
if ((inode->i_ino & (bufsize - 1)) + *pnt > bufsize)
|
goto out_bad_span;
|
goto out_bad_span;
|
|
|
/* Now test for possible Rock Ridge extensions which will override
|
/* Now test for possible Rock Ridge extensions which will override
|
some of these numbers in the inode structure. */
|
some of these numbers in the inode structure. */
|
|
|
SETUP_ROCK_RIDGE(raw_inode, chr, len);
|
SETUP_ROCK_RIDGE(raw_inode, chr, len);
|
|
|
repeat:
|
repeat:
|
while (len > 1) { /* There may be one byte for padding somewhere */
|
while (len > 1) { /* There may be one byte for padding somewhere */
|
rr = (struct rock_ridge *) chr;
|
rr = (struct rock_ridge *) chr;
|
if (rr->len == 0)
|
if (rr->len == 0)
|
goto out; /* Something got screwed up here */
|
goto out; /* Something got screwed up here */
|
sig = isonum_721(chr);
|
sig = isonum_721(chr);
|
chr += rr->len;
|
chr += rr->len;
|
len -= rr->len;
|
len -= rr->len;
|
|
|
switch (sig) {
|
switch (sig) {
|
case SIG('R', 'R'):
|
case SIG('R', 'R'):
|
if ((rr->u.RR.flags[0] & RR_SL) == 0)
|
if ((rr->u.RR.flags[0] & RR_SL) == 0)
|
goto out;
|
goto out;
|
break;
|
break;
|
case SIG('S', 'P'):
|
case SIG('S', 'P'):
|
CHECK_SP(goto out);
|
CHECK_SP(goto out);
|
break;
|
break;
|
case SIG('S', 'L'):
|
case SIG('S', 'L'):
|
rpnt = get_symlink_chunk(rpnt, rr,
|
rpnt = get_symlink_chunk(rpnt, rr,
|
link + (PAGE_SIZE - 1));
|
link + (PAGE_SIZE - 1));
|
if (rpnt == NULL)
|
if (rpnt == NULL)
|
goto out;
|
goto out;
|
break;
|
break;
|
case SIG('C', 'E'):
|
case SIG('C', 'E'):
|
/* This tells is if there is a continuation record */
|
/* This tells is if there is a continuation record */
|
CHECK_CE;
|
CHECK_CE;
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
}
|
}
|
MAYBE_CONTINUE(repeat, inode);
|
MAYBE_CONTINUE(repeat, inode);
|
|
|
if (rpnt == link)
|
if (rpnt == link)
|
goto fail;
|
goto fail;
|
brelse(bh);
|
brelse(bh);
|
*rpnt = '\0';
|
*rpnt = '\0';
|
unlock_kernel();
|
unlock_kernel();
|
SetPageUptodate(page);
|
SetPageUptodate(page);
|
kunmap(page);
|
kunmap(page);
|
UnlockPage(page);
|
UnlockPage(page);
|
return 0;
|
return 0;
|
|
|
/* error exit from macro */
|
/* error exit from macro */
|
out:
|
out:
|
if (buffer)
|
if (buffer)
|
kfree(buffer);
|
kfree(buffer);
|
goto fail;
|
goto fail;
|
out_noread:
|
out_noread:
|
printk("unable to read i-node block");
|
printk("unable to read i-node block");
|
goto fail;
|
goto fail;
|
out_bad_span:
|
out_bad_span:
|
printk("symlink spans iso9660 blocks\n");
|
printk("symlink spans iso9660 blocks\n");
|
fail:
|
fail:
|
brelse(bh);
|
brelse(bh);
|
unlock_kernel();
|
unlock_kernel();
|
SetPageError(page);
|
SetPageError(page);
|
kunmap(page);
|
kunmap(page);
|
UnlockPage(page);
|
UnlockPage(page);
|
return -EIO;
|
return -EIO;
|
}
|
}
|
|
|
struct address_space_operations isofs_symlink_aops = {
|
struct address_space_operations isofs_symlink_aops = {
|
readpage: rock_ridge_symlink_readpage
|
readpage: rock_ridge_symlink_readpage
|
};
|
};
|
|
|
