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-rw-r--r--fs/isofs/rock.c571
1 files changed, 285 insertions, 286 deletions
diff --git a/fs/isofs/rock.c b/fs/isofs/rock.c
index bbc348f0189a..e981c040a49b 100644
--- a/fs/isofs/rock.c
+++ b/fs/isofs/rock.c
@@ -90,82 +90,78 @@ int get_rock_ridge_filename(struct iso_directory_record *de,
int len;
unsigned char *chr;
CONTINUE_DECLS;
- int retnamlen = 0, truncate = 0;
+ struct rock_ridge *rr;
+ int sig;
+ int retnamlen = 0;
+ int truncate = 0;
if (!ISOFS_SB(inode->i_sb)->s_rock)
return 0;
*retname = 0;
SETUP_ROCK_RIDGE(de, chr, len);
- repeat:
- {
- struct rock_ridge *rr;
- int sig;
-
- while (len > 2) { /* There may be one byte for padding somewhere */
- rr = (struct rock_ridge *)chr;
- if (rr->len < 3)
- goto out; /* Something got screwed up here */
- sig = isonum_721(chr);
- chr += rr->len;
- len -= rr->len;
- if (len < 0)
- goto out; /* corrupted isofs */
-
- switch (sig) {
- case SIG('R', 'R'):
- if ((rr->u.RR.flags[0] & RR_NM) == 0)
- goto out;
+repeat:
+
+ while (len > 2) { /* There may be one byte for padding somewhere */
+ rr = (struct rock_ridge *)chr;
+ if (rr->len < 3)
+ goto out; /* Something got screwed up here */
+ sig = isonum_721(chr);
+ chr += rr->len;
+ len -= rr->len;
+ if (len < 0)
+ goto out; /* corrupted isofs */
+
+ switch (sig) {
+ case SIG('R', 'R'):
+ if ((rr->u.RR.flags[0] & RR_NM) == 0)
+ goto out;
+ break;
+ case SIG('S', 'P'):
+ CHECK_SP(goto out);
+ break;
+ case SIG('C', 'E'):
+ CHECK_CE;
+ break;
+ case SIG('N', 'M'):
+ if (truncate)
break;
- case SIG('S', 'P'):
- CHECK_SP(goto out);
+ if (rr->len < 5)
break;
- case SIG('C', 'E'):
- CHECK_CE;
+ /*
+ * If the flags are 2 or 4, this indicates '.' or '..'.
+ * We don't want to do anything with this, because it
+ * screws up the code that calls us. We don't really
+ * care anyways, since we can just use the non-RR
+ * name.
+ */
+ if (rr->u.NM.flags & 6)
break;
- case SIG('N', 'M'):
- if (truncate)
- break;
- if (rr->len < 5)
- break;
- /*
- * If the flags are 2 or 4, this indicates '.' or '..'.
- * We don't want to do anything with this, because it
- * screws up the code that calls us. We don't really
- * care anyways, since we can just use the non-RR
- * name.
- */
- if (rr->u.NM.flags & 6) {
- break;
- }
- if (rr->u.NM.flags & ~1) {
- printk
- ("Unsupported NM flag settings (%d)\n",
- rr->u.NM.flags);
- break;
- }
- if ((strlen(retname) + rr->len - 5) >= 254) {
- truncate = 1;
- break;
- }
- strncat(retname, rr->u.NM.name, rr->len - 5);
- retnamlen += rr->len - 5;
+ if (rr->u.NM.flags & ~1) {
+ printk("Unsupported NM flag settings (%d)\n",
+ rr->u.NM.flags);
break;
- case SIG('R', 'E'):
- if (buffer)
- kfree(buffer);
- return -1;
- default:
+ }
+ if ((strlen(retname) + rr->len - 5) >= 254) {
+ truncate = 1;
break;
}
+ strncat(retname, rr->u.NM.name, rr->len - 5);
+ retnamlen += rr->len - 5;
+ break;
+ case SIG('R', 'E'):
+ if (buffer)
+ kfree(buffer);
+ return -1;
+ default:
+ break;
}
}
MAYBE_CONTINUE(repeat, inode);
- if (buffer)
- kfree(buffer);
+ kfree(buffer);
return retnamlen; /* If 0, this file did not have a NM field */
- out:
+out:
if (buffer)
kfree(buffer);
return 0;
@@ -178,6 +174,11 @@ parse_rock_ridge_inode_internal(struct iso_directory_record *de,
int len;
unsigned char *chr;
int symlink_len = 0;
+ int cnt, sig;
+ struct inode *reloc;
+ struct rock_ridge *rr;
+ int rootflag;
+
CONTINUE_DECLS;
if (!ISOFS_SB(inode->i_sb)->s_rock)
@@ -191,238 +192,237 @@ parse_rock_ridge_inode_internal(struct iso_directory_record *de,
len = 0;
}
- repeat:
- {
- int cnt, sig;
- struct inode *reloc;
- struct rock_ridge *rr;
- int rootflag;
-
- while (len > 2) { /* There may be one byte for padding somewhere */
- rr = (struct rock_ridge *)chr;
- if (rr->len < 3)
- goto out; /* Something got screwed up here */
- sig = isonum_721(chr);
- chr += rr->len;
- len -= rr->len;
- if (len < 0)
- goto out; /* corrupted isofs */
-
- switch (sig) {
+repeat:
+ while (len > 2) { /* There may be one byte for padding somewhere */
+ rr = (struct rock_ridge *)chr;
+ if (rr->len < 3)
+ goto out; /* Something got screwed up here */
+ sig = isonum_721(chr);
+ chr += rr->len;
+ len -= rr->len;
+ if (len < 0)
+ goto out; /* corrupted isofs */
+
+ switch (sig) {
#ifndef CONFIG_ZISOFS /* No flag for SF or ZF */
- case SIG('R', 'R'):
- if ((rr->u.RR.flags[0] &
- (RR_PX | RR_TF | RR_SL | RR_CL)) == 0)
- goto out;
- break;
+ case SIG('R', 'R'):
+ if ((rr->u.RR.flags[0] &
+ (RR_PX | RR_TF | RR_SL | RR_CL)) == 0)
+ goto out;
+ break;
#endif
- case SIG('S', 'P'):
- CHECK_SP(goto out);
- break;
- case SIG('C', 'E'):
- CHECK_CE;
- break;
- case SIG('E', 'R'):
- ISOFS_SB(inode->i_sb)->s_rock = 1;
- printk(KERN_DEBUG "ISO 9660 Extensions: ");
- {
- int p;
- for (p = 0; p < rr->u.ER.len_id; p++)
- printk("%c", rr->u.ER.data[p]);
+ case SIG('S', 'P'):
+ CHECK_SP(goto out);
+ break;
+ case SIG('C', 'E'):
+ CHECK_CE;
+ break;
+ case SIG('E', 'R'):
+ ISOFS_SB(inode->i_sb)->s_rock = 1;
+ printk(KERN_DEBUG "ISO 9660 Extensions: ");
+ {
+ int p;
+ for (p = 0; p < rr->u.ER.len_id; p++)
+ printk("%c", rr->u.ER.data[p]);
+ }
+ printk("\n");
+ break;
+ case SIG('P', 'X'):
+ inode->i_mode = isonum_733(rr->u.PX.mode);
+ inode->i_nlink = isonum_733(rr->u.PX.n_links);
+ inode->i_uid = isonum_733(rr->u.PX.uid);
+ inode->i_gid = isonum_733(rr->u.PX.gid);
+ break;
+ case SIG('P', 'N'):
+ {
+ int high, low;
+ high = isonum_733(rr->u.PN.dev_high);
+ low = isonum_733(rr->u.PN.dev_low);
+ /*
+ * The Rock Ridge standard specifies that if
+ * sizeof(dev_t) <= 4, then the high field is
+ * unused, and the device number is completely
+ * 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
+ * stored in the low field, and use that.
+ */
+ if ((low & ~0xff) && high == 0) {
+ inode->i_rdev =
+ MKDEV(low >> 8, low & 0xff);
+ } else {
+ inode->i_rdev =
+ MKDEV(high, low);
}
- printk("\n");
- break;
- case SIG('P', 'X'):
- inode->i_mode = isonum_733(rr->u.PX.mode);
- inode->i_nlink = isonum_733(rr->u.PX.n_links);
- inode->i_uid = isonum_733(rr->u.PX.uid);
- inode->i_gid = isonum_733(rr->u.PX.gid);
- break;
- case SIG('P', 'N'):
- {
- int high, low;
- high = isonum_733(rr->u.PN.dev_high);
- low = isonum_733(rr->u.PN.dev_low);
- /*
- * The Rock Ridge standard specifies that if sizeof(dev_t) <= 4,
- * then the high field is unused, and the device number is completely
- * 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
- * stored in the low field, and use that.
- */
- if ((low & ~0xff) && high == 0) {
- inode->i_rdev =
- MKDEV(low >> 8, low & 0xff);
- } else {
- inode->i_rdev =
- MKDEV(high, low);
+ }
+ break;
+ case SIG('T', 'F'):
+ /*
+ * Some RRIP writers incorrectly place ctime in the
+ * TF_CREATE field. Try to handle this correctly for
+ * either case.
+ */
+ /* Rock ridge never appears on a High Sierra disk */
+ cnt = 0;
+ if (rr->u.TF.flags & TF_CREATE) {
+ inode->i_ctime.tv_sec =
+ iso_date(rr->u.TF.times[cnt++].time,
+ 0);
+ inode->i_ctime.tv_nsec = 0;
+ }
+ if (rr->u.TF.flags & TF_MODIFY) {
+ inode->i_mtime.tv_sec =
+ iso_date(rr->u.TF.times[cnt++].time,
+ 0);
+ inode->i_mtime.tv_nsec = 0;
+ }
+ if (rr->u.TF.flags & TF_ACCESS) {
+ inode->i_atime.tv_sec =
+ iso_date(rr->u.TF.times[cnt++].time,
+ 0);
+ inode->i_atime.tv_nsec = 0;
+ }
+ if (rr->u.TF.flags & TF_ATTRIBUTES) {
+ inode->i_ctime.tv_sec =
+ iso_date(rr->u.TF.times[cnt++].time,
+ 0);
+ inode->i_ctime.tv_nsec = 0;
+ }
+ break;
+ case SIG('S', 'L'):
+ {
+ int slen;
+ struct SL_component *slp;
+ struct SL_component *oldslp;
+ slen = rr->len - 5;
+ slp = &rr->u.SL.link;
+ inode->i_size = symlink_len;
+ while (slen > 1) {
+ rootflag = 0;
+ switch (slp->flags & ~1) {
+ case 0:
+ inode->i_size +=
+ slp->len;
+ break;
+ case 2:
+ inode->i_size += 1;
+ break;
+ case 4:
+ inode->i_size += 2;
+ break;
+ case 8:
+ rootflag = 1;
+ inode->i_size += 1;
+ break;
+ default:
+ printk("Symlink component flag "
+ "not implemented\n");
}
- }
- break;
- case SIG('T', 'F'):
- /* Some RRIP writers incorrectly place ctime in the TF_CREATE field.
- Try to handle this correctly for either case. */
- cnt = 0; /* Rock ridge never appears on a High Sierra disk */
- if (rr->u.TF.flags & TF_CREATE) {
- inode->i_ctime.tv_sec =
- iso_date(rr->u.TF.times[cnt++].time,
- 0);
- inode->i_ctime.tv_nsec = 0;
- }
- if (rr->u.TF.flags & TF_MODIFY) {
- inode->i_mtime.tv_sec =
- iso_date(rr->u.TF.times[cnt++].time,
- 0);
- inode->i_mtime.tv_nsec = 0;
- }
- if (rr->u.TF.flags & TF_ACCESS) {
- inode->i_atime.tv_sec =
- iso_date(rr->u.TF.times[cnt++].time,
- 0);
- inode->i_atime.tv_nsec = 0;
- }
- if (rr->u.TF.flags & TF_ATTRIBUTES) {
- inode->i_ctime.tv_sec =
- iso_date(rr->u.TF.times[cnt++].time,
- 0);
- inode->i_ctime.tv_nsec = 0;
- }
- break;
- case SIG('S', 'L'):
- {
- int slen;
- struct SL_component *slp;
- struct SL_component *oldslp;
- slen = rr->len - 5;
- slp = &rr->u.SL.link;
- inode->i_size = symlink_len;
- while (slen > 1) {
- rootflag = 0;
- switch (slp->flags & ~1) {
- case 0:
+ slen -= slp->len + 2;
+ oldslp = slp;
+ slp = (struct SL_component *)
+ (((char *)slp) + slp->len + 2);
+
+ if (slen < 2) {
+ if (((rr->u.SL.
+ flags & 1) != 0)
+ &&
+ ((oldslp->
+ flags & 1) == 0))
inode->i_size +=
- slp->len;
- break;
- case 2:
- inode->i_size += 1;
- break;
- case 4:
- inode->i_size += 2;
- break;
- case 8:
- rootflag = 1;
- inode->i_size += 1;
- break;
- default:
- printk
- ("Symlink component flag not implemented\n");
- }
- slen -= slp->len + 2;
- oldslp = slp;
- slp =
- (struct SL_component
- *)(((char *)slp) +
- slp->len + 2);
-
- if (slen < 2) {
- if (((rr->u.SL.
- flags & 1) != 0)
- &&
- ((oldslp->
- flags & 1) == 0))
- inode->i_size +=
- 1;
- break;
- }
-
- /*
- * If this component record isn't continued, then append a '/'.
- */
- if (!rootflag
- && (oldslp->flags & 1) == 0)
- inode->i_size += 1;
+ 1;
+ break;
}
+
+ /*
+ * If this component record isn't
+ * continued, then append a '/'.
+ */
+ if (!rootflag
+ && (oldslp->flags & 1) == 0)
+ inode->i_size += 1;
}
- symlink_len = inode->i_size;
- break;
- case SIG('R', 'E'):
- printk(KERN_WARNING
- "Attempt to read inode for relocated directory\n");
+ }
+ symlink_len = inode->i_size;
+ break;
+ case SIG('R', 'E'):
+ printk(KERN_WARNING "Attempt to read inode for "
+ "relocated directory\n");
+ goto out;
+ case SIG('C', 'L'):
+ ISOFS_I(inode)->i_first_extent =
+ isonum_733(rr->u.CL.location);
+ reloc =
+ isofs_iget(inode->i_sb,
+ ISOFS_I(inode)->i_first_extent,
+ 0);
+ if (!reloc)
goto out;
- case SIG('C', 'L'):
- ISOFS_I(inode)->i_first_extent =
- isonum_733(rr->u.CL.location);
- reloc =
- isofs_iget(inode->i_sb,
- ISOFS_I(inode)->i_first_extent,
- 0);
- if (!reloc)
- goto out;
- inode->i_mode = reloc->i_mode;
- inode->i_nlink = reloc->i_nlink;
- inode->i_uid = reloc->i_uid;
- inode->i_gid = reloc->i_gid;
- inode->i_rdev = reloc->i_rdev;
- inode->i_size = reloc->i_size;
- inode->i_blocks = reloc->i_blocks;
- inode->i_atime = reloc->i_atime;
- inode->i_ctime = reloc->i_ctime;
- inode->i_mtime = reloc->i_mtime;
- iput(reloc);
- break;
+ inode->i_mode = reloc->i_mode;
+ inode->i_nlink = reloc->i_nlink;
+ inode->i_uid = reloc->i_uid;
+ inode->i_gid = reloc->i_gid;
+ inode->i_rdev = reloc->i_rdev;
+ inode->i_size = reloc->i_size;
+ inode->i_blocks = reloc->i_blocks;
+ inode->i_atime = reloc->i_atime;
+ inode->i_ctime = reloc->i_ctime;
+ inode->i_mtime = reloc->i_mtime;
+ iput(reloc);
+ break;
#ifdef CONFIG_ZISOFS
- case SIG('Z', 'F'):
- if (!ISOFS_SB(inode->i_sb)->s_nocompress) {
- int algo;
- algo = isonum_721(rr->u.ZF.algorithm);
- if (algo == SIG('p', 'z')) {
- int block_shift =
- isonum_711(&rr->u.ZF.
- parms[1]);
- 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);
- } else {
- /* Note: we don't change i_blocks here */
- ISOFS_I(inode)->
- i_file_format =
- isofs_file_compressed;
- /* Parameters to compression algorithm (header size, block size) */
- ISOFS_I(inode)->
- i_format_parm[0] =
- isonum_711(&rr->u.
- ZF.
- parms
- [0]);
- ISOFS_I(inode)->
- i_format_parm[1] =
- isonum_711(&rr->u.
- ZF.
- parms
- [1]);
- inode->i_size =
- isonum_733(rr->u.ZF.
- real_size);
- }
- } else {
- printk(KERN_WARNING
- "isofs: Unknown ZF compression algorithm: %c%c\n",
- rr->u.ZF.algorithm[0],
- rr->u.ZF.algorithm[1]);
- }
- }
- break;
-#endif
- default:
+ case SIG('Z', 'F'): {
+ int algo;
+
+ if (ISOFS_SB(inode->i_sb)->s_nocompress)
break;
+ algo = isonum_721(rr->u.ZF.algorithm);
+ if (algo == SIG('p', 'z')) {
+ int block_shift =
+ isonum_711(&rr->u.ZF.parms[1]);
+ 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);
+ } else {
+ /*
+ * Note: we don't change
+ * i_blocks here
+ */
+ ISOFS_I(inode)->i_file_format =
+ isofs_file_compressed;
+ /*
+ * Parameters to compression
+ * algorithm (header size,
+ * block size)
+ */
+ ISOFS_I(inode)->i_format_parm[0] =
+ isonum_711(&rr->u.ZF.parms[0]);
+ ISOFS_I(inode)->i_format_parm[1] =
+ isonum_711(&rr->u.ZF.parms[1]);
+ inode->i_size =
+ isonum_733(rr->u.ZF.
+ real_size);
+ }
+ } else {
+ printk(KERN_WARNING
+ "isofs: Unknown ZF compression "
+ "algorithm: %c%c\n",
+ rr->u.ZF.algorithm[0],
+ rr->u.ZF.algorithm[1]);
}
+ break;
+ }
+#endif
+ default:
+ break;
}
}
MAYBE_CONTINUE(repeat, inode);
- out:
+out:
if (buffer)
kfree(buffer);
return 0;
@@ -553,8 +553,8 @@ static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
SETUP_ROCK_RIDGE(raw_inode, chr, len);
- repeat:
- while (len > 2) { /* There may be one byte for padding somewhere */
+repeat:
+ while (len > 2) { /* There may be one byte for padding somewhere */
rr = (struct rock_ridge *)chr;
if (rr->len < 3)
goto out; /* Something got screwed up here */
@@ -586,8 +586,7 @@ static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
}
}
MAYBE_CONTINUE(repeat, inode);
- if (buffer)
- kfree(buffer);
+ kfree(buffer);
if (rpnt == link)
goto fail;
@@ -600,19 +599,19 @@ static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
return 0;
/* error exit from macro */
- out:
+out:
if (buffer)
kfree(buffer);
goto fail;
- out_noread:
+out_noread:
printk("unable to read i-node block");
goto fail;
- out_bad_span:
+out_bad_span:
printk("symlink spans iso9660 blocks\n");
- fail:
+fail:
brelse(bh);
unlock_kernel();
- error:
+error:
SetPageError(page);
kunmap(page);
unlock_page(page);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 16:09:12 +0000