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-rw-r--r--fs/isofs/Makefile10
-rw-r--r--fs/isofs/compress.c359
-rw-r--r--fs/isofs/dir.c280
-rw-r--r--fs/isofs/export.c228
-rw-r--r--fs/isofs/inode.c1503
-rw-r--r--fs/isofs/joliet.c103
-rw-r--r--fs/isofs/namei.c201
-rw-r--r--fs/isofs/rock.c565
-rw-r--r--fs/isofs/rock.h119
-rw-r--r--fs/isofs/util.c83
-rw-r--r--fs/isofs/zisofs.h21
11 files changed, 3472 insertions, 0 deletions
diff --git a/fs/isofs/Makefile b/fs/isofs/Makefile
new file mode 100644
index 0000000..bf162f0
--- /dev/null
+++ b/fs/isofs/Makefile
@@ -0,0 +1,10 @@
+#
+# Makefile for the Linux isofs filesystem routines.
+#
+
+obj-$(CONFIG_ISO9660_FS) += isofs.o
+
+isofs-objs-y := namei.o inode.o dir.o util.o rock.o export.o
+isofs-objs-$(CONFIG_JOLIET) += joliet.o
+isofs-objs-$(CONFIG_ZISOFS) += compress.o
+isofs-objs := $(isofs-objs-y)
diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c
new file mode 100644
index 0000000..fb42c3f
--- /dev/null
+++ b/fs/isofs/compress.c
@@ -0,0 +1,359 @@
+/* -*- linux-c -*- ------------------------------------------------------- *
+ *
+ * Copyright 2001 H. Peter Anvin - All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
+ * USA; either version 2 of the License, or (at your option) any later
+ * version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * linux/fs/isofs/compress.c
+ *
+ * Transparent decompression of files on an iso9660 filesystem
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/stat.h>
+#include <linux/time.h>
+#include <linux/iso_fs.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/nls.h>
+#include <linux/ctype.h>
+#include <linux/smp_lock.h>
+#include <linux/blkdev.h>
+#include <linux/vmalloc.h>
+#include <linux/zlib.h>
+#include <linux/buffer_head.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+
+#include "zisofs.h"
+
+/* This should probably be global. */
+static char zisofs_sink_page[PAGE_CACHE_SIZE];
+
+/*
+ * This contains the zlib memory allocation and the mutex for the
+ * allocation; this avoids failures at block-decompression time.
+ */
+static void *zisofs_zlib_workspace;
+static struct semaphore zisofs_zlib_semaphore;
+
+/*
+ * When decompressing, we typically obtain more than one page
+ * per reference. We inject the additional pages into the page
+ * cache as a form of readahead.
+ */
+static int zisofs_readpage(struct file *file, struct page *page)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ struct address_space *mapping = inode->i_mapping;
+ unsigned int maxpage, xpage, fpage, blockindex;
+ unsigned long offset;
+ unsigned long blockptr, blockendptr, cstart, cend, csize;
+ struct buffer_head *bh, *ptrbh[2];
+ unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
+ unsigned int bufshift = ISOFS_BUFFER_BITS(inode);
+ unsigned long bufmask = bufsize - 1;
+ int err = -EIO;
+ int i;
+ unsigned int header_size = ISOFS_I(inode)->i_format_parm[0];
+ unsigned int zisofs_block_shift = ISOFS_I(inode)->i_format_parm[1];
+ /* unsigned long zisofs_block_size = 1UL << zisofs_block_shift; */
+ unsigned int zisofs_block_page_shift = zisofs_block_shift-PAGE_CACHE_SHIFT;
+ unsigned long zisofs_block_pages = 1UL << zisofs_block_page_shift;
+ unsigned long zisofs_block_page_mask = zisofs_block_pages-1;
+ struct page *pages[zisofs_block_pages];
+ unsigned long index = page->index;
+ int indexblocks;
+
+ /* We have already been given one page, this is the one
+ we must do. */
+ xpage = index & zisofs_block_page_mask;
+ pages[xpage] = page;
+
+ /* The remaining pages need to be allocated and inserted */
+ offset = index & ~zisofs_block_page_mask;
+ blockindex = offset >> zisofs_block_page_shift;
+ maxpage = (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ maxpage = min(zisofs_block_pages, maxpage-offset);
+
+ for ( i = 0 ; i < maxpage ; i++, offset++ ) {
+ if ( i != xpage ) {
+ pages[i] = grab_cache_page_nowait(mapping, offset);
+ }
+ page = pages[i];
+ if ( page ) {
+ ClearPageError(page);
+ kmap(page);
+ }
+ }
+
+ /* This is the last page filled, plus one; used in case of abort. */
+ fpage = 0;
+
+ /* Find the pointer to this specific chunk */
+ /* Note: we're not using isonum_731() here because the data is known aligned */
+ /* Note: header_size is in 32-bit words (4 bytes) */
+ blockptr = (header_size + blockindex) << 2;
+ blockendptr = blockptr + 4;
+
+ indexblocks = ((blockptr^blockendptr) >> bufshift) ? 2 : 1;
+ ptrbh[0] = ptrbh[1] = NULL;
+
+ if ( isofs_get_blocks(inode, blockptr >> bufshift, ptrbh, indexblocks) != indexblocks ) {
+ if ( ptrbh[0] ) brelse(ptrbh[0]);
+ printk(KERN_DEBUG "zisofs: Null buffer on reading block table, inode = %lu, block = %lu\n",
+ inode->i_ino, blockptr >> bufshift);
+ goto eio;
+ }
+ ll_rw_block(READ, indexblocks, ptrbh);
+
+ bh = ptrbh[0];
+ if ( !bh || (wait_on_buffer(bh), !buffer_uptodate(bh)) ) {
+ printk(KERN_DEBUG "zisofs: Failed to read block table, inode = %lu, block = %lu\n",
+ inode->i_ino, blockptr >> bufshift);
+ if ( ptrbh[1] )
+ brelse(ptrbh[1]);
+ goto eio;
+ }
+ cstart = le32_to_cpu(*(__le32 *)(bh->b_data + (blockptr & bufmask)));
+
+ if ( indexblocks == 2 ) {
+ /* We just crossed a block boundary. Switch to the next block */
+ brelse(bh);
+ bh = ptrbh[1];
+ if ( !bh || (wait_on_buffer(bh), !buffer_uptodate(bh)) ) {
+ printk(KERN_DEBUG "zisofs: Failed to read block table, inode = %lu, block = %lu\n",
+ inode->i_ino, blockendptr >> bufshift);
+ goto eio;
+ }
+ }
+ cend = le32_to_cpu(*(__le32 *)(bh->b_data + (blockendptr & bufmask)));
+ brelse(bh);
+
+ csize = cend-cstart;
+
+ /* Now page[] contains an array of pages, any of which can be NULL,
+ and the locks on which we hold. We should now read the data and
+ release the pages. If the pages are NULL the decompressed data
+ for that particular page should be discarded. */
+
+ if ( csize == 0 ) {
+ /* This data block is empty. */
+
+ for ( fpage = 0 ; fpage < maxpage ; fpage++ ) {
+ if ( (page = pages[fpage]) != NULL ) {
+ memset(page_address(page), 0, PAGE_CACHE_SIZE);
+
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ kunmap(page);
+ unlock_page(page);
+ if ( fpage == xpage )
+ err = 0; /* The critical page */
+ else
+ page_cache_release(page);
+ }
+ }
+ } else {
+ /* This data block is compressed. */
+ z_stream stream;
+ int bail = 0, left_out = -1;
+ int zerr;
+ int needblocks = (csize + (cstart & bufmask) + bufmask) >> bufshift;
+ int haveblocks;
+ struct buffer_head *bhs[needblocks+1];
+ struct buffer_head **bhptr;
+
+ /* Because zlib is not thread-safe, do all the I/O at the top. */
+
+ blockptr = cstart >> bufshift;
+ memset(bhs, 0, (needblocks+1)*sizeof(struct buffer_head *));
+ haveblocks = isofs_get_blocks(inode, blockptr, bhs, needblocks);
+ ll_rw_block(READ, haveblocks, bhs);
+
+ bhptr = &bhs[0];
+ bh = *bhptr++;
+
+ /* First block is special since it may be fractional.
+ We also wait for it before grabbing the zlib
+ semaphore; odds are that the subsequent blocks are
+ going to come in in short order so we don't hold
+ the zlib semaphore longer than necessary. */
+
+ if ( !bh || (wait_on_buffer(bh), !buffer_uptodate(bh)) ) {
+ printk(KERN_DEBUG "zisofs: Hit null buffer, fpage = %d, xpage = %d, csize = %ld\n",
+ fpage, xpage, csize);
+ goto b_eio;
+ }
+ stream.next_in = bh->b_data + (cstart & bufmask);
+ stream.avail_in = min(bufsize-(cstart & bufmask), csize);
+ csize -= stream.avail_in;
+
+ stream.workspace = zisofs_zlib_workspace;
+ down(&zisofs_zlib_semaphore);
+
+ zerr = zlib_inflateInit(&stream);
+ if ( zerr != Z_OK ) {
+ if ( err && zerr == Z_MEM_ERROR )
+ err = -ENOMEM;
+ printk(KERN_DEBUG "zisofs: zisofs_inflateInit returned %d\n",
+ zerr);
+ goto z_eio;
+ }
+
+ while ( !bail && fpage < maxpage ) {
+ page = pages[fpage];
+ if ( page )
+ stream.next_out = page_address(page);
+ else
+ stream.next_out = (void *)&zisofs_sink_page;
+ stream.avail_out = PAGE_CACHE_SIZE;
+
+ while ( stream.avail_out ) {
+ int ao, ai;
+ if ( stream.avail_in == 0 && left_out ) {
+ if ( !csize ) {
+ printk(KERN_WARNING "zisofs: ZF read beyond end of input\n");
+ bail = 1;
+ break;
+ } else {
+ bh = *bhptr++;
+ if ( !bh ||
+ (wait_on_buffer(bh), !buffer_uptodate(bh)) ) {
+ /* Reached an EIO */
+ printk(KERN_DEBUG "zisofs: Hit null buffer, fpage = %d, xpage = %d, csize = %ld\n",
+ fpage, xpage, csize);
+
+ bail = 1;
+ break;
+ }
+ stream.next_in = bh->b_data;
+ stream.avail_in = min(csize,bufsize);
+ csize -= stream.avail_in;
+ }
+ }
+ ao = stream.avail_out; ai = stream.avail_in;
+ zerr = zlib_inflate(&stream, Z_SYNC_FLUSH);
+ left_out = stream.avail_out;
+ if ( zerr == Z_BUF_ERROR && stream.avail_in == 0 )
+ continue;
+ if ( zerr != Z_OK ) {
+ /* EOF, error, or trying to read beyond end of input */
+ if ( err && zerr == Z_MEM_ERROR )
+ err = -ENOMEM;
+ if ( zerr != Z_STREAM_END )
+ printk(KERN_DEBUG "zisofs: zisofs_inflate returned %d, inode = %lu, index = %lu, fpage = %d, xpage = %d, avail_in = %d, avail_out = %d, ai = %d, ao = %d\n",
+ zerr, inode->i_ino, index,
+ fpage, xpage,
+ stream.avail_in, stream.avail_out,
+ ai, ao);
+ bail = 1;
+ break;
+ }
+ }
+
+ if ( stream.avail_out && zerr == Z_STREAM_END ) {
+ /* Fractional page written before EOF. This may
+ be the last page in the file. */
+ memset(stream.next_out, 0, stream.avail_out);
+ stream.avail_out = 0;
+ }
+
+ if ( !stream.avail_out ) {
+ /* This page completed */
+ if ( page ) {
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ kunmap(page);
+ unlock_page(page);
+ if ( fpage == xpage )
+ err = 0; /* The critical page */
+ else
+ page_cache_release(page);
+ }
+ fpage++;
+ }
+ }
+ zlib_inflateEnd(&stream);
+
+ z_eio:
+ up(&zisofs_zlib_semaphore);
+
+ b_eio:
+ for ( i = 0 ; i < haveblocks ; i++ ) {
+ if ( bhs[i] )
+ brelse(bhs[i]);
+ }
+ }
+
+eio:
+
+ /* Release any residual pages, do not SetPageUptodate */
+ while ( fpage < maxpage ) {
+ page = pages[fpage];
+ if ( page ) {
+ flush_dcache_page(page);
+ if ( fpage == xpage )
+ SetPageError(page);
+ kunmap(page);
+ unlock_page(page);
+ if ( fpage != xpage )
+ page_cache_release(page);
+ }
+ fpage++;
+ }
+
+ /* At this point, err contains 0 or -EIO depending on the "critical" page */
+ return err;
+}
+
+struct address_space_operations zisofs_aops = {
+ .readpage = zisofs_readpage,
+ /* No sync_page operation supported? */
+ /* No bmap operation supported */
+};
+
+static int initialized;
+
+int __init zisofs_init(void)
+{
+ if ( initialized ) {
+ printk("zisofs_init: called more than once\n");
+ return 0;
+ }
+
+ zisofs_zlib_workspace = vmalloc(zlib_inflate_workspacesize());
+ if ( !zisofs_zlib_workspace )
+ return -ENOMEM;
+ init_MUTEX(&zisofs_zlib_semaphore);
+
+ initialized = 1;
+ return 0;
+}
+
+void zisofs_cleanup(void)
+{
+ if ( !initialized ) {
+ printk("zisofs_cleanup: called without initialization\n");
+ return;
+ }
+
+ vfree(zisofs_zlib_workspace);
+ initialized = 0;
+}
diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c
new file mode 100644
index 0000000..14d86de
--- /dev/null
+++ b/fs/isofs/dir.c
@@ -0,0 +1,280 @@
+/*
+ * linux/fs/isofs/dir.c
+ *
+ * (C) 1992, 1993, 1994 Eric Youngdale Modified for ISO 9660 filesystem.
+ *
+ * (C) 1991 Linus Torvalds - minix filesystem
+ *
+ * Steve Beynon : Missing last directory entries fixed
+ * (stephen@askone.demon.co.uk) : 21st June 1996
+ *
+ * isofs directory handling functions
+ */
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/iso_fs.h>
+#include <linux/kernel.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/config.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+
+#include <asm/uaccess.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)
+ break;
+
+ if (c >= 'A' && c <= 'Z')
+ c |= 0x20; /* lower case */
+
+ /* Drop trailing '.;1' (ISO 9660:1988 7.5.1 requires period) */
+ if (c == '.' && i == len - 3 && old[i + 1] == ';' && old[i + 2] == '1')
+ break;
+
+ /* Drop trailing ';1' */
+ if (c == ';' && i == len - 2 && old[i + 1] == '1')
+ break;
+
+ /* Convert remaining ';' to '.' */
+ /* Also '/' to '.' (broken Acorn-generated ISO9660 images) */
+ if (c == ';' || c == '/')
+ c = '.';
+
+ new[i] = c;
+ }
+ return i;
+}
+
+/* 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 std;
+ unsigned char * chr;
+ int retnamlen = isofs_name_translate(de, retname, inode);
+ 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;
+ chr = ((unsigned char *) de) + std;
+ 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))
+ {
+ retname[retnamlen] = ',';
+ sprintf(retname+retnamlen+1, "%3.3x",
+ ((chr[12] & 0xf) << 8) | chr[11]);
+ retnamlen += 4;
+ }
+ return retnamlen;
+}
+
+/*
+ * This should _really_ be cleaned up some day..
+ */
+static int do_isofs_readdir(struct inode *inode, struct file *filp,
+ void *dirent, filldir_t filldir,
+ char * tmpname, struct iso_directory_record * tmpde)
+{
+ unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
+ unsigned char bufbits = ISOFS_BUFFER_BITS(inode);
+ unsigned long block, offset, block_saved, offset_saved;
+ unsigned long inode_number = 0; /* Quiet GCC */
+ struct buffer_head *bh = NULL;
+ int len;
+ int map;
+ int first_de = 1;
+ char *p = NULL; /* Quiet GCC */
+ struct iso_directory_record *de;
+ struct isofs_sb_info *sbi = ISOFS_SB(inode->i_sb);
+
+ offset = filp->f_pos & (bufsize - 1);
+ block = filp->f_pos >> bufbits;
+
+ while (filp->f_pos < inode->i_size) {
+ int de_len;
+
+ if (!bh) {
+ bh = isofs_bread(inode, block);
+ if (!bh)
+ return 0;
+ }
+
+ de = (struct iso_directory_record *) (bh->b_data + offset);
+
+ 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 (de_len == 0) {
+ brelse(bh);
+ bh = NULL;
+ filp->f_pos = (filp->f_pos + ISOFS_BLOCK_SIZE) & ~(ISOFS_BLOCK_SIZE - 1);
+ block = filp->f_pos >> bufbits;
+ offset = 0;
+ continue;
+ }
+
+ block_saved = block;
+ offset_saved = offset;
+ offset += de_len;
+
+ /* Make sure we have a full directory entry */
+ if (offset >= bufsize) {
+ int slop = bufsize - offset + de_len;
+ memcpy(tmpde, de, slop);
+ offset &= bufsize - 1;
+ block++;
+ brelse(bh);
+ bh = NULL;
+ if (offset) {
+ bh = isofs_bread(inode, block);
+ if (!bh)
+ return 0;
+ memcpy((void *) tmpde + slop, bh->b_data, offset);
+ }
+ de = tmpde;
+ }
+
+ if (first_de) {
+ isofs_normalize_block_and_offset(de,
+ &block_saved,
+ &offset_saved);
+ inode_number = isofs_get_ino(block_saved,
+ offset_saved,
+ bufbits);
+ }
+
+ if (de->flags[-sbi->s_high_sierra] & 0x80) {
+ first_de = 0;
+ filp->f_pos += de_len;
+ continue;
+ }
+ first_de = 1;
+
+ /* Handle the case of the '.' directory */
+ if (de->name_len[0] == 1 && de->name[0] == 0) {
+ if (filldir(dirent, ".", 1, filp->f_pos, inode->i_ino, DT_DIR) < 0)
+ break;
+ filp->f_pos += de_len;
+ continue;
+ }
+
+ len = 0;
+
+ /* Handle the case of the '..' directory */
+ if (de->name_len[0] == 1 && de->name[0] == 1) {
+ inode_number = parent_ino(filp->f_dentry);
+ if (filldir(dirent, "..", 2, filp->f_pos, inode_number, DT_DIR) < 0)
+ break;
+ filp->f_pos += de_len;
+ continue;
+ }
+
+ /* 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;
+ }
+ }
+
+ map = 1;
+ if (sbi->s_rock) {
+ len = get_rock_ridge_filename(de, tmpname, inode);
+ if (len != 0) { /* may be -1 */
+ p = tmpname;
+ map = 0;
+ }
+ }
+ if (map) {
+#ifdef CONFIG_JOLIET
+ if (sbi->s_joliet_level) {
+ len = get_joliet_filename(de, tmpname, inode);
+ p = tmpname;
+ } else
+#endif
+ if (sbi->s_mapping == 'a') {
+ len = get_acorn_filename(de, tmpname, inode);
+ p = tmpname;
+ } else
+ if (sbi->s_mapping == 'n') {
+ len = isofs_name_translate(de, tmpname, inode);
+ p = tmpname;
+ } else {
+ p = de->name;
+ len = de->name_len[0];
+ }
+ }
+ if (len > 0) {
+ if (filldir(dirent, p, len, filp->f_pos, inode_number, DT_UNKNOWN) < 0)
+ break;
+ }
+ filp->f_pos += de_len;
+
+ continue;
+ }
+ if (bh) brelse(bh);
+ return 0;
+}
+
+/*
+ * Handle allocation of temporary space for name translation and
+ * handling split directory entries.. The real work is done by
+ * "do_isofs_readdir()".
+ */
+static int isofs_readdir(struct file *filp,
+ void *dirent, filldir_t filldir)
+{
+ int result;
+ char * tmpname;
+ struct iso_directory_record * tmpde;
+ struct inode *inode = filp->f_dentry->d_inode;
+
+
+ tmpname = (char *)__get_free_page(GFP_KERNEL);
+ if (tmpname == NULL)
+ return -ENOMEM;
+
+ lock_kernel();
+ tmpde = (struct iso_directory_record *) (tmpname+1024);
+
+ result = do_isofs_readdir(inode, filp, dirent, filldir, tmpname, tmpde);
+
+ free_page((unsigned long) tmpname);
+ unlock_kernel();
+ return result;
+}
diff --git a/fs/isofs/export.c b/fs/isofs/export.c
new file mode 100644
index 0000000..e4252c9
--- /dev/null
+++ b/fs/isofs/export.c
@@ -0,0 +1,228 @@
+/*
+ * fs/isofs/export.c
+ *
+ * (C) 2004 Paul Serice - The new inode scheme requires switching
+ * from iget() to iget5_locked() which means
+ * the NFS export operations have to be hand
+ * coded because the default routines rely on
+ * iget().
+ *
+ * The following files are helpful:
+ *
+ * Documentation/filesystems/Exporting
+ * fs/exportfs/expfs.c.
+ */
+
+#include <linux/buffer_head.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/iso_fs.h>
+#include <linux/kernel.h>
+
+static struct dentry *
+isofs_export_iget(struct super_block *sb,
+ unsigned long block,
+ unsigned long offset,
+ __u32 generation)
+{
+ struct inode *inode;
+ struct dentry *result;
+ if (block == 0)
+ return ERR_PTR(-ESTALE);
+ inode = isofs_iget(sb, block, offset);
+ if (inode == NULL)
+ return ERR_PTR(-ENOMEM);
+ if (is_bad_inode(inode)
+ || (generation && inode->i_generation != generation))
+ {
+ iput(inode);
+ return ERR_PTR(-ESTALE);
+ }
+ result = d_alloc_anon(inode);
+ if (!result) {
+ iput(inode);
+ return ERR_PTR(-ENOMEM);
+ }
+ return result;
+}
+
+static struct dentry *
+isofs_export_get_dentry(struct super_block *sb, void *vobjp)
+{
+ __u32 *objp = vobjp;
+ unsigned long block = objp[0];
+ unsigned long offset = objp[1];
+ __u32 generation = objp[2];
+ return isofs_export_iget(sb, block, offset, generation);
+}
+
+/* This function is surprisingly simple. The trick is understanding
+ * that "child" is always a directory. So, to find its parent, you
+ * simply need to find its ".." entry, normalize its block and offset,
+ * and return the underlying inode. See the comments for
+ * isofs_normalize_block_and_offset(). */
+static struct dentry *isofs_export_get_parent(struct dentry *child)
+{
+ unsigned long parent_block = 0;
+ unsigned long parent_offset = 0;
+ struct inode *child_inode = child->d_inode;
+ struct iso_inode_info *e_child_inode = ISOFS_I(child_inode);
+ struct inode *parent_inode = NULL;
+ struct iso_directory_record *de = NULL;
+ struct buffer_head * bh = NULL;
+ struct dentry *rv = NULL;
+
+ /* "child" must always be a directory. */
+ if (!S_ISDIR(child_inode->i_mode)) {
+ printk(KERN_ERR "isofs: isofs_export_get_parent(): "
+ "child is not a directory!\n");
+ rv = ERR_PTR(-EACCES);
+ goto out;
+ }
+
+ /* It is an invariant that the directory offset is zero. If
+ * it is not zero, it means the directory failed to be
+ * normalized for some reason. */
+ if (e_child_inode->i_iget5_offset != 0) {
+ printk(KERN_ERR "isofs: isofs_export_get_parent(): "
+ "child directory not normalized!\n");
+ rv = ERR_PTR(-EACCES);
+ goto out;
+ }
+
+ /* The child inode has been normalized such that its
+ * i_iget5_block value points to the "." entry. Fortunately,
+ * the ".." entry is located in the same block. */
+ parent_block = e_child_inode->i_iget5_block;
+
+ /* Get the block in question. */
+ bh = sb_bread(child_inode->i_sb, parent_block);
+ if (bh == NULL) {
+ rv = ERR_PTR(-EACCES);
+ goto out;
+ }
+
+ /* This is the "." entry. */
+ de = (struct iso_directory_record*)bh->b_data;
+
+ /* The ".." entry is always the second entry. */
+ parent_offset = (unsigned long)isonum_711(de->length);
+ de = (struct iso_directory_record*)(bh->b_data + parent_offset);
+
+ /* Verify it is in fact the ".." entry. */
+ if ((isonum_711(de->name_len) != 1) || (de->name[0] != 1)) {
+ printk(KERN_ERR "isofs: Unable to find the \"..\" "
+ "directory for NFS.\n");
+ rv = ERR_PTR(-EACCES);
+ goto out;
+ }
+
+ /* Normalize */
+ isofs_normalize_block_and_offset(de, &parent_block, &parent_offset);
+
+ /* Get the inode. */
+ parent_inode = isofs_iget(child_inode->i_sb,
+ parent_block,
+ parent_offset);
+ if (parent_inode == NULL) {
+ rv = ERR_PTR(-EACCES);
+ goto out;
+ }
+
+ /* Allocate the dentry. */
+ rv = d_alloc_anon(parent_inode);
+ if (rv == NULL) {
+ rv = ERR_PTR(-ENOMEM);
+ goto out;
+ }
+
+ out:
+ if (bh) {
+ brelse(bh);
+ }
+ return rv;
+}
+
+static int
+isofs_export_encode_fh(struct dentry *dentry,
+ __u32 *fh32,
+ int *max_len,
+ int connectable)
+{
+ struct inode * inode = dentry->d_inode;
+ struct iso_inode_info * ei = ISOFS_I(inode);
+ int len = *max_len;
+ int type = 1;
+ __u16 *fh16 = (__u16*)fh32;
+
+ /*
+ * WARNING: max_len is 5 for NFSv2. Because of this
+ * limitation, we use the lower 16 bits of fh32[1] to hold the
+ * offset of the inode and the upper 16 bits of fh32[1] to
+ * hold the offset of the parent.
+ */
+
+ if (len < 3 || (connectable && len < 5))
+ return 255;
+
+ len = 3;
+ fh32[0] = ei->i_iget5_block;
+ fh16[2] = (__u16)ei->i_iget5_offset; /* fh16 [sic] */
+ fh32[2] = inode->i_generation;
+ if (connectable && !S_ISDIR(inode->i_mode)) {
+ struct inode *parent;
+ struct iso_inode_info *eparent;
+ spin_lock(&dentry->d_lock);
+ parent = dentry->d_parent->d_inode;
+ eparent = ISOFS_I(parent);
+ fh32[3] = eparent->i_iget5_block;
+ fh16[3] = (__u16)eparent->i_iget5_offset; /* fh16 [sic] */
+ fh32[4] = parent->i_generation;
+ spin_unlock(&dentry->d_lock);
+ len = 5;
+ type = 2;
+ }
+ *max_len = len;
+ return type;
+}
+
+
+static struct dentry *
+isofs_export_decode_fh(struct super_block *sb,
+ __u32 *fh32,
+ int fh_len,
+ int fileid_type,
+ int (*acceptable)(void *context, struct dentry *de),
+ void *context)
+{
+ __u16 *fh16 = (__u16*)fh32;
+ __u32 child[3]; /* The child is what triggered all this. */
+ __u32 parent[3]; /* The parent is just along for the ride. */
+
+ if (fh_len < 3 || fileid_type > 2)
+ return NULL;
+
+ child[0] = fh32[0];
+ child[1] = fh16[2]; /* fh16 [sic] */
+ child[2] = fh32[2];
+
+ parent[0] = 0;
+ parent[1] = 0;
+ parent[2] = 0;
+ if (fileid_type == 2) {
+ if (fh_len > 2) parent[0] = fh32[3];
+ parent[1] = fh16[3]; /* fh16 [sic] */
+ if (fh_len > 4) parent[2] = fh32[4];
+ }
+
+ return sb->s_export_op->find_exported_dentry(sb, child, parent,
+ acceptable, context);
+}
+
+
+struct export_operations isofs_export_ops = {
+ .decode_fh = isofs_export_decode_fh,
+ .encode_fh = isofs_export_encode_fh,
+ .get_dentry = isofs_export_get_dentry,
+ .get_parent = isofs_export_get_parent,
+};
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
new file mode 100644
index 0000000..b9256e6
--- /dev/null
+++ b/fs/isofs/inode.c
@@ -0,0 +1,1503 @@
+/*
+ * linux/fs/isofs/inode.c
+ *
+ * (C) 1991 Linus Torvalds - minix filesystem
+ * 1992, 1993, 1994 Eric Youngdale Modified for ISO 9660 filesystem.
+ * 1994 Eberhard Moenkeberg - multi session handling.
+ * 1995 Mark Dobie - allow mounting of some weird VideoCDs and PhotoCDs.
+ * 1997 Gordon Chaffee - Joliet CDs
+ * 1998 Eric Lammerts - ISO 9660 Level 3
+ * 2004 Paul Serice - Inode Support pushed out from 4GB to 128GB
+ * 2004 Paul Serice - NFS Export Operations
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/stat.h>
+#include <linux/time.h>
+#include <linux/iso_fs.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/cdrom.h>
+#include <linux/init.h>
+#include <linux/nls.h>
+#include <linux/ctype.h>
+#include <linux/smp_lock.h>
+#include <linux/blkdev.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+#include <linux/parser.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include "zisofs.h"
+
+#define BEQUIET
+
+#ifdef LEAK_CHECK
+static int check_malloc;
+static int check_bread;
+#endif
+
+static int isofs_hashi(struct dentry *parent, struct qstr *qstr);
+static int isofs_hash(struct dentry *parent, struct qstr *qstr);
+static int isofs_dentry_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b);
+static int isofs_dentry_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b);
+
+#ifdef CONFIG_JOLIET
+static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr);
+static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr);
+static int isofs_dentry_cmpi_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
+static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
+#endif
+
+static void isofs_put_super(struct super_block *sb)
+{
+ struct isofs_sb_info *sbi = ISOFS_SB(sb);
+#ifdef CONFIG_JOLIET
+ if (sbi->s_nls_iocharset) {
+ unload_nls(sbi->s_nls_iocharset);
+ sbi->s_nls_iocharset = NULL;
+ }
+#endif
+
+#ifdef LEAK_CHECK
+ printk("Outstanding mallocs:%d, outstanding buffers: %d\n",
+ check_malloc, check_bread);
+#endif
+
+ kfree(sbi);
+ sb->s_fs_info = NULL;
+ return;
+}
+
+static void isofs_read_inode(struct inode *);
+static int isofs_statfs (struct super_block *, struct kstatfs *);
+
+static kmem_cache_t *isofs_inode_cachep;
+
+static struct inode *isofs_alloc_inode(struct super_block *sb)
+{
+ struct iso_inode_info *ei;
+ ei = (struct iso_inode_info *)kmem_cache_alloc(isofs_inode_cachep, SLAB_KERNEL);
+ if (!ei)
+ return NULL;
+ return &ei->vfs_inode;
+}
+
+static void isofs_destroy_inode(struct inode *inode)
+{
+ kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+ struct iso_inode_info *ei = (struct iso_inode_info *) foo;
+
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR)
+ inode_init_once(&ei->vfs_inode);
+}
+
+static int init_inodecache(void)
+{
+ isofs_inode_cachep = kmem_cache_create("isofs_inode_cache",
+ sizeof(struct iso_inode_info),
+ 0, SLAB_RECLAIM_ACCOUNT,
+ init_once, NULL);
+ if (isofs_inode_cachep == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static void destroy_inodecache(void)
+{
+ if (kmem_cache_destroy(isofs_inode_cachep))
+ printk(KERN_INFO "iso_inode_cache: not all structures were freed\n");
+}
+
+static int isofs_remount(struct super_block *sb, int *flags, char *data)
+{
+ /* we probably want a lot more here */
+ *flags |= MS_RDONLY;
+ return 0;
+}
+
+static struct super_operations isofs_sops = {
+ .alloc_inode = isofs_alloc_inode,
+ .destroy_inode = isofs_destroy_inode,
+ .read_inode = isofs_read_inode,
+ .put_super = isofs_put_super,
+ .statfs = isofs_statfs,
+ .remount_fs = isofs_remount,
+};
+
+
+static struct dentry_operations isofs_dentry_ops[] = {
+ {
+ .d_hash = isofs_hash,
+ .d_compare = isofs_dentry_cmp,
+ },
+ {
+ .d_hash = isofs_hashi,
+ .d_compare = isofs_dentry_cmpi,
+ },
+#ifdef CONFIG_JOLIET
+ {
+ .d_hash = isofs_hash_ms,
+ .d_compare = isofs_dentry_cmp_ms,
+ },
+ {
+ .d_hash = isofs_hashi_ms,
+ .d_compare = isofs_dentry_cmpi_ms,
+ }
+#endif
+};
+
+struct iso9660_options{
+ char map;
+ char rock;
+ char joliet;
+ char cruft;
+ char unhide;
+ char nocompress;
+ unsigned char check;
+ unsigned int blocksize;
+ mode_t mode;
+ gid_t gid;
+ uid_t uid;
+ char *iocharset;
+ unsigned char utf8;
+ /* LVE */
+ s32 session;
+ s32 sbsector;
+};
+
+/*
+ * Compute the hash for the isofs name corresponding to the dentry.
+ */
+static int
+isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms)
+{
+ const char *name;
+ int len;
+
+ len = qstr->len;
+ name = qstr->name;
+ if (ms) {
+ while (len && name[len-1] == '.')
+ len--;
+ }
+
+ qstr->hash = full_name_hash(name, len);
+
+ return 0;
+}
+
+/*
+ * Compute the hash for the isofs name corresponding to the dentry.
+ */
+static int
+isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
+{
+ const char *name;
+ int len;
+ char c;
+ unsigned long hash;
+
+ len = qstr->len;
+ name = qstr->name;
+ if (ms) {
+ while (len && name[len-1] == '.')
+ len--;
+ }
+
+ hash = init_name_hash();
+ while (len--) {
+ c = tolower(*name++);
+ hash = partial_name_hash(tolower(c), hash);
+ }
+ qstr->hash = end_name_hash(hash);
+
+ return 0;
+}
+
+/*
+ * Case insensitive compare of two isofs names.
+ */
+static int
+isofs_dentry_cmpi_common(struct dentry *dentry,struct qstr *a,struct qstr *b,int ms)
+{
+ int alen, blen;
+
+ /* A filename cannot end in '.' or we treat it like it has none */
+ alen = a->len;
+ blen = b->len;
+ if (ms) {
+ while (alen && a->name[alen-1] == '.')
+ alen--;
+ while (blen && b->name[blen-1] == '.')
+ blen--;
+ }
+ if (alen == blen) {
+ if (strnicmp(a->name, b->name, alen) == 0)
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * Case sensitive compare of two isofs names.
+ */
+static int
+isofs_dentry_cmp_common(struct dentry *dentry,struct qstr *a,struct qstr *b,int ms)
+{
+ int alen, blen;
+
+ /* A filename cannot end in '.' or we treat it like it has none */
+ alen = a->len;
+ blen = b->len;
+ if (ms) {
+ while (alen && a->name[alen-1] == '.')
+ alen--;
+ while (blen && b->name[blen-1] == '.')
+ blen--;
+ }
+ if (alen == blen) {
+ if (strncmp(a->name, b->name, alen) == 0)
+ return 0;
+ }
+ return 1;
+}
+
+static int
+isofs_hash(struct dentry *dentry, struct qstr *qstr)
+{
+ return isofs_hash_common(dentry, qstr, 0);
+}
+
+static int
+isofs_hashi(struct dentry *dentry, struct qstr *qstr)
+{
+ return isofs_hashi_common(dentry, qstr, 0);
+}
+
+static int
+isofs_dentry_cmp(struct dentry *dentry,struct qstr *a,struct qstr *b)
+{
+ return isofs_dentry_cmp_common(dentry, a, b, 0);
+}
+
+static int
+isofs_dentry_cmpi(struct dentry *dentry,struct qstr *a,struct qstr *b)
+{
+ return isofs_dentry_cmpi_common(dentry, a, b, 0);
+}
+
+#ifdef CONFIG_JOLIET
+static int
+isofs_hash_ms(struct dentry *dentry, struct qstr *qstr)
+{
+ return isofs_hash_common(dentry, qstr, 1);
+}
+
+static int
+isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr)
+{
+ return isofs_hashi_common(dentry, qstr, 1);
+}
+
+static int
+isofs_dentry_cmp_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
+{
+ return isofs_dentry_cmp_common(dentry, a, b, 1);
+}
+
+static int
+isofs_dentry_cmpi_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
+{
+ return isofs_dentry_cmpi_common(dentry, a, b, 1);
+}
+#endif
+
+enum {
+ Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore,
+ Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet,
+ Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err,
+ Opt_nocompress,
+};
+
+static match_table_t tokens = {
+ {Opt_norock, "norock"},
+ {Opt_nojoliet, "nojoliet"},
+ {Opt_unhide, "unhide"},
+ {Opt_cruft, "cruft"},
+ {Opt_utf8, "utf8"},
+ {Opt_iocharset, "iocharset=%s"},
+ {Opt_map_a, "map=acorn"},
+ {Opt_map_a, "map=a"},
+ {Opt_map_n, "map=normal"},
+ {Opt_map_n, "map=n"},
+ {Opt_map_o, "map=off"},
+ {Opt_map_o, "map=o"},
+ {Opt_session, "session=%u"},
+ {Opt_sb, "sbsector=%u"},
+ {Opt_check_r, "check=relaxed"},
+ {Opt_check_r, "check=r"},
+ {Opt_check_s, "check=strict"},
+ {Opt_check_s, "check=s"},
+ {Opt_uid, "uid=%u"},
+ {Opt_gid, "gid=%u"},
+ {Opt_mode, "mode=%u"},
+ {Opt_block, "block=%u"},
+ {Opt_ignore, "conv=binary"},
+ {Opt_ignore, "conv=b"},
+ {Opt_ignore, "conv=text"},
+ {Opt_ignore, "conv=t"},
+ {Opt_ignore, "conv=mtext"},
+ {Opt_ignore, "conv=m"},
+ {Opt_ignore, "conv=auto"},
+ {Opt_ignore, "conv=a"},
+ {Opt_nocompress, "nocompress"},
+ {Opt_err, NULL}
+};
+
+static int parse_options(char *options, struct iso9660_options * popt)
+{
+ char *p;
+ int option;
+
+ popt->map = 'n';
+ popt->rock = 'y';
+ popt->joliet = 'y';
+ popt->cruft = 'n';
+ popt->unhide = 'n';
+ popt->check = 'u'; /* unset */
+ popt->nocompress = 0;
+ popt->blocksize = 1024;
+ popt->mode = S_IRUGO | S_IXUGO; /* r-x for all. The disc could
+ be shared with DOS machines so
+ virtually anything could be
+ a valid executable. */
+ popt->gid = 0;
+ popt->uid = 0;
+ popt->iocharset = NULL;
+ popt->utf8 = 0;
+ popt->session=-1;
+ popt->sbsector=-1;
+ if (!options)
+ return 1;
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+ substring_t args[MAX_OPT_ARGS];
+ unsigned n;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_norock:
+ popt->rock = 'n';
+ break;
+ case Opt_nojoliet:
+ popt->joliet = 'n';
+ break;
+ case Opt_unhide:
+ popt->unhide = 'y';
+ break;
+ case Opt_cruft:
+ popt->cruft = 'y';
+ break;
+ case Opt_utf8:
+ popt->utf8 = 1;
+ break;
+#ifdef CONFIG_JOLIET
+ case Opt_iocharset:
+ popt->iocharset = match_strdup(&args[0]);
+ break;
+#endif
+ case Opt_map_a:
+ popt->map = 'a';
+ break;
+ case Opt_map_o:
+ popt->map = 'o';
+ break;
+ case Opt_map_n:
+ popt->map = 'n';
+ break;
+ case Opt_session:
+ if (match_int(&args[0], &option))
+ return 0;
+ n = option;
+ if (n > 99)
+ return 0;
+ popt->session = n + 1;
+ break;
+ case Opt_sb:
+ if (match_int(&args[0], &option))
+ return 0;
+ popt->sbsector = option;
+ break;
+ case Opt_check_r:
+ popt->check = 'r';
+ break;
+ case Opt_check_s:
+ popt->check = 's';
+ break;
+ case Opt_ignore:
+ break;
+ case Opt_uid:
+ if (match_int(&args[0], &option))
+ return 0;
+ popt->uid = option;
+ break;
+ case Opt_gid:
+ if (match_int(&args[0], &option))
+ return 0;
+ popt->gid = option;
+ break;
+ case Opt_mode:
+ if (match_int(&args[0], &option))
+ return 0;
+ popt->mode = option;
+ break;
+ case Opt_block:
+ if (match_int(&args[0], &option))
+ return 0;
+ n = option;
+ if (n != 512 && n != 1024 && n != 2048)
+ return 0;
+ popt->blocksize = n;
+ break;
+ case Opt_nocompress:
+ popt->nocompress = 1;
+ break;
+ default:
+ return 0;
+ }
+ }
+ return 1;
+}
+
+/*
+ * look if the driver can tell the multi session redirection value
+ *
+ * don't change this if you don't know what you do, please!
+ * Multisession is legal only with XA disks.
+ * A non-XA disk with more than one volume descriptor may do it right, but
+ * usually is written in a nowhere standardized "multi-partition" manner.
+ * Multisession uses absolute addressing (solely the first frame of the whole
+ * track is #0), multi-partition uses relative addressing (each first frame of
+ * each track is #0), and a track is not a session.
+ *
+ * A broken CDwriter software or drive firmware does not set new standards,
+ * at least not if conflicting with the existing ones.
+ *
+ * emoenke@gwdg.de
+ */
+#define WE_OBEY_THE_WRITTEN_STANDARDS 1
+
+static unsigned int isofs_get_last_session(struct super_block *sb,s32 session )
+{
+ struct cdrom_multisession ms_info;
+ unsigned int vol_desc_start;
+ struct block_device *bdev = sb->s_bdev;
+ int i;
+
+ vol_desc_start=0;
+ ms_info.addr_format=CDROM_LBA;
+ if(session >= 0 && session <= 99) {
+ struct cdrom_tocentry Te;
+ Te.cdte_track=session;
+ Te.cdte_format=CDROM_LBA;
+ i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te);
+ if (!i) {
+ printk(KERN_DEBUG "Session %d start %d type %d\n",
+ session, Te.cdte_addr.lba,
+ Te.cdte_ctrl&CDROM_DATA_TRACK);
+ if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4)
+ return Te.cdte_addr.lba;
+ }
+
+ printk(KERN_ERR "Invalid session number or type of track\n");
+ }
+ i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info);
+ if(session > 0) printk(KERN_ERR "Invalid session number\n");
+#if 0
+ printk("isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
+ if (i==0) {
+ printk("isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
+ printk("isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
+ }
+#endif
+ if (i==0)
+#if WE_OBEY_THE_WRITTEN_STANDARDS
+ if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
+#endif
+ vol_desc_start=ms_info.addr.lba;
+ return vol_desc_start;
+}
+
+/*
+ * Initialize the superblock and read the root inode.
+ *
+ * Note: a check_disk_change() has been done immediately prior
+ * to this call, so we don't need to check again.
+ */
+static int isofs_fill_super(struct super_block *s, void *data, int silent)
+{
+ struct buffer_head * bh = NULL, *pri_bh = NULL;
+ struct hs_primary_descriptor * h_pri = NULL;
+ struct iso_primary_descriptor * pri = NULL;
+ struct iso_supplementary_descriptor *sec = NULL;
+ struct iso_directory_record * rootp;
+ int joliet_level = 0;
+ int iso_blknum, block;
+ int orig_zonesize;
+ int table;
+ unsigned int vol_desc_start;
+ unsigned long first_data_zone;
+ struct inode * inode;
+ struct iso9660_options opt;
+ struct isofs_sb_info * sbi;
+
+ sbi = kmalloc(sizeof(struct isofs_sb_info), GFP_KERNEL);
+ if (!sbi)
+ return -ENOMEM;
+ s->s_fs_info = sbi;
+ memset(sbi, 0, sizeof(struct isofs_sb_info));
+
+ if (!parse_options((char *) data, &opt))
+ goto out_freesbi;
+
+ /*
+ * First of all, get the hardware blocksize for this device.
+ * If we don't know what it is, or the hardware blocksize is
+ * larger than the blocksize the user specified, then use
+ * that value.
+ */
+ /*
+ * What if bugger tells us to go beyond page size?
+ */
+ opt.blocksize = sb_min_blocksize(s, opt.blocksize);
+
+ sbi->s_high_sierra = 0; /* default is iso9660 */
+
+ vol_desc_start = (opt.sbsector != -1) ?
+ opt.sbsector : isofs_get_last_session(s,opt.session);
+
+ for (iso_blknum = vol_desc_start+16;
+ iso_blknum < vol_desc_start+100; iso_blknum++)
+ {
+ struct hs_volume_descriptor * hdp;
+ struct iso_volume_descriptor * vdp;
+
+ block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits);
+ if (!(bh = sb_bread(s, block)))
+ goto out_no_read;
+
+ vdp = (struct iso_volume_descriptor *)bh->b_data;
+ hdp = (struct hs_volume_descriptor *)bh->b_data;
+
+ /* Due to the overlapping physical location of the descriptors,
+ * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure
+ * proper identification in this case, we first check for ISO.
+ */
+ if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
+ if (isonum_711 (vdp->type) == ISO_VD_END)
+ break;
+ if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) {
+ if (pri == NULL) {
+ pri = (struct iso_primary_descriptor *)vdp;
+ /* Save the buffer in case we need it ... */
+ pri_bh = bh;
+ bh = NULL;
+ }
+ }
+#ifdef CONFIG_JOLIET
+ else if (isonum_711 (vdp->type) == ISO_VD_SUPPLEMENTARY) {
+ sec = (struct iso_supplementary_descriptor *)vdp;
+ if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
+ if (opt.joliet == 'y') {
+ if (sec->escape[2] == 0x40) {
+ joliet_level = 1;
+ } else if (sec->escape[2] == 0x43) {
+ joliet_level = 2;
+ } else if (sec->escape[2] == 0x45) {
+ joliet_level = 3;
+ }
+ printk(KERN_DEBUG"ISO 9660 Extensions: Microsoft Joliet Level %d\n",
+ joliet_level);
+ }
+ goto root_found;
+ } else {
+ /* Unknown supplementary volume descriptor */
+ sec = NULL;
+ }
+ }
+#endif
+ } else {
+ if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
+ if (isonum_711 (hdp->type) != ISO_VD_PRIMARY)
+ goto out_freebh;
+
+ sbi->s_high_sierra = 1;
+ opt.rock = 'n';
+ h_pri = (struct hs_primary_descriptor *)vdp;
+ goto root_found;
+ }
+ }
+
+ /* Just skip any volume descriptors we don't recognize */
+
+ brelse(bh);
+ bh = NULL;
+ }
+ /*
+ * If we fall through, either no volume descriptor was found,
+ * or else we passed a primary descriptor looking for others.
+ */
+ if (!pri)
+ goto out_unknown_format;
+ brelse(bh);
+ bh = pri_bh;
+ pri_bh = NULL;
+
+root_found:
+
+ if (joliet_level && (pri == NULL || opt.rock == 'n')) {
+ /* This is the case of Joliet with the norock mount flag.
+ * A disc with both Joliet and Rock Ridge is handled later
+ */
+ pri = (struct iso_primary_descriptor *) sec;
+ }
+
+ if(sbi->s_high_sierra){
+ rootp = (struct iso_directory_record *) h_pri->root_directory_record;
+ sbi->s_nzones = isonum_733 (h_pri->volume_space_size);
+ sbi->s_log_zone_size = isonum_723 (h_pri->logical_block_size);
+ sbi->s_max_size = isonum_733(h_pri->volume_space_size);
+ } else {
+ if (!pri)
+ goto out_freebh;
+ rootp = (struct iso_directory_record *) pri->root_directory_record;
+ sbi->s_nzones = isonum_733 (pri->volume_space_size);
+ sbi->s_log_zone_size = isonum_723 (pri->logical_block_size);
+ sbi->s_max_size = isonum_733(pri->volume_space_size);
+ }
+
+ sbi->s_ninodes = 0; /* No way to figure this out easily */
+
+ orig_zonesize = sbi->s_log_zone_size;
+ /*
+ * If the zone size is smaller than the hardware sector size,
+ * this is a fatal error. This would occur if the disc drive
+ * had sectors that were 2048 bytes, but the filesystem had
+ * blocks that were 512 bytes (which should only very rarely
+ * happen.)
+ */
+ if(orig_zonesize < opt.blocksize)
+ goto out_bad_size;
+
+ /* RDE: convert log zone size to bit shift */
+ switch (sbi->s_log_zone_size)
+ { case 512: sbi->s_log_zone_size = 9; break;
+ case 1024: sbi->s_log_zone_size = 10; break;
+ case 2048: sbi->s_log_zone_size = 11; break;
+
+ default:
+ goto out_bad_zone_size;
+ }
+
+ s->s_magic = ISOFS_SUPER_MAGIC;
+ s->s_maxbytes = 0xffffffff; /* We can handle files up to 4 GB */
+
+ /* The CDROM is read-only, has no nodes (devices) on it, and since
+ all of the files appear to be owned by root, we really do not want
+ to allow suid. (suid or devices will not show up unless we have
+ Rock Ridge extensions) */
+
+ s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */;
+
+ /* Set this for reference. Its not currently used except on write
+ which we don't have .. */
+
+ first_data_zone = isonum_733 (rootp->extent) +
+ isonum_711 (rootp->ext_attr_length);
+ sbi->s_firstdatazone = first_data_zone;
+#ifndef BEQUIET
+ printk(KERN_DEBUG "Max size:%ld Log zone size:%ld\n",
+ sbi->s_max_size,
+ 1UL << sbi->s_log_zone_size);
+ printk(KERN_DEBUG "First datazone:%ld\n", sbi->s_firstdatazone);
+ if(sbi->s_high_sierra)
+ printk(KERN_DEBUG "Disc in High Sierra format.\n");
+#endif
+
+ /*
+ * If the Joliet level is set, we _may_ decide to use the
+ * secondary descriptor, but can't be sure until after we
+ * read the root inode. But before reading the root inode
+ * we may need to change the device blocksize, and would
+ * rather release the old buffer first. So, we cache the
+ * first_data_zone value from the secondary descriptor.
+ */
+ if (joliet_level) {
+ pri = (struct iso_primary_descriptor *) sec;
+ rootp = (struct iso_directory_record *)
+ pri->root_directory_record;
+ first_data_zone = isonum_733 (rootp->extent) +
+ isonum_711 (rootp->ext_attr_length);
+ }
+
+ /*
+ * We're all done using the volume descriptor, and may need
+ * to change the device blocksize, so release the buffer now.
+ */
+ brelse(pri_bh);
+ brelse(bh);
+
+ /*
+ * Force the blocksize to 512 for 512 byte sectors. The file
+ * read primitives really get it wrong in a bad way if we don't
+ * do this.
+ *
+ * Note - we should never be setting the blocksize to something
+ * less than the hardware sector size for the device. If we
+ * do, we would end up having to read larger buffers and split
+ * out portions to satisfy requests.
+ *
+ * Note2- the idea here is that we want to deal with the optimal
+ * zonesize in the filesystem. If we have it set to something less,
+ * then we have horrible problems with trying to piece together
+ * bits of adjacent blocks in order to properly read directory
+ * entries. By forcing the blocksize in this way, we ensure
+ * that we will never be required to do this.
+ */
+ sb_set_blocksize(s, orig_zonesize);
+
+ sbi->s_nls_iocharset = NULL;
+
+#ifdef CONFIG_JOLIET
+ if (joliet_level && opt.utf8 == 0) {
+ char * p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT;
+ sbi->s_nls_iocharset = load_nls(p);
+ if (! sbi->s_nls_iocharset) {
+ /* Fail only if explicit charset specified */
+ if (opt.iocharset)
+ goto out_freesbi;
+ sbi->s_nls_iocharset = load_nls_default();
+ }
+ }
+#endif
+ s->s_op = &isofs_sops;
+ s->s_export_op = &isofs_export_ops;
+ sbi->s_mapping = opt.map;
+ sbi->s_rock = (opt.rock == 'y' ? 2 : 0);
+ sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/
+ sbi->s_cruft = opt.cruft;
+ sbi->s_unhide = opt.unhide;
+ sbi->s_uid = opt.uid;
+ sbi->s_gid = opt.gid;
+ sbi->s_utf8 = opt.utf8;
+ sbi->s_nocompress = opt.nocompress;
+ /*
+ * It would be incredibly stupid to allow people to mark every file
+ * on the disk as suid, so we merely allow them to set the default
+ * permissions.
+ */
+ sbi->s_mode = opt.mode & 0777;
+
+ /*
+ * Read the root inode, which _may_ result in changing
+ * the s_rock flag. Once we have the final s_rock value,
+ * we then decide whether to use the Joliet descriptor.
+ */
+ inode = isofs_iget(s, sbi->s_firstdatazone, 0);
+
+ /*
+ * If this disk has both Rock Ridge and Joliet on it, then we
+ * want to use Rock Ridge by default. This can be overridden
+ * by using the norock mount option. There is still one other
+ * possibility that is not taken into account: a Rock Ridge
+ * CD with Unicode names. Until someone sees such a beast, it
+ * will not be supported.
+ */
+ if (sbi->s_rock == 1) {
+ joliet_level = 0;
+ } else if (joliet_level) {
+ sbi->s_rock = 0;
+ if (sbi->s_firstdatazone != first_data_zone) {
+ sbi->s_firstdatazone = first_data_zone;
+ printk(KERN_DEBUG
+ "ISOFS: changing to secondary root\n");
+ iput(inode);
+ inode = isofs_iget(s, sbi->s_firstdatazone, 0);
+ }
+ }
+
+ if (opt.check == 'u') {
+ /* Only Joliet is case insensitive by default */
+ if (joliet_level) opt.check = 'r';
+ else opt.check = 's';
+ }
+ sbi->s_joliet_level = joliet_level;
+
+ /* check the root inode */
+ if (!inode)
+ goto out_no_root;
+ if (!inode->i_op)
+ goto out_bad_root;
+ /* get the root dentry */
+ s->s_root = d_alloc_root(inode);
+ if (!(s->s_root))
+ goto out_no_root;
+
+ table = 0;
+ if (joliet_level) table += 2;
+ if (opt.check == 'r') table++;
+ s->s_root->d_op = &isofs_dentry_ops[table];
+
+ if (opt.iocharset)
+ kfree(opt.iocharset);
+
+ return 0;
+
+ /*
+ * Display error messages and free resources.
+ */
+out_bad_root:
+ printk(KERN_WARNING "isofs_fill_super: root inode not initialized\n");
+ goto out_iput;
+out_no_root:
+ printk(KERN_WARNING "isofs_fill_super: get root inode failed\n");
+out_iput:
+ iput(inode);
+#ifdef CONFIG_JOLIET
+ if (sbi->s_nls_iocharset)
+ unload_nls(sbi->s_nls_iocharset);
+#endif
+ goto out_freesbi;
+out_no_read:
+ printk(KERN_WARNING "isofs_fill_super: "
+ "bread failed, dev=%s, iso_blknum=%d, block=%d\n",
+ s->s_id, iso_blknum, block);
+ goto out_freesbi;
+out_bad_zone_size:
+ printk(KERN_WARNING "Bad logical zone size %ld\n",
+ sbi->s_log_zone_size);
+ goto out_freebh;
+out_bad_size:
+ printk(KERN_WARNING "Logical zone size(%d) < hardware blocksize(%u)\n",
+ orig_zonesize, opt.blocksize);
+ goto out_freebh;
+out_unknown_format:
+ if (!silent)
+ printk(KERN_WARNING "Unable to identify CD-ROM format.\n");
+
+out_freebh:
+ brelse(bh);
+out_freesbi:
+ if (opt.iocharset)
+ kfree(opt.iocharset);
+ kfree(sbi);
+ s->s_fs_info = NULL;
+ return -EINVAL;
+}
+
+static int isofs_statfs (struct super_block *sb, struct kstatfs *buf)
+{
+ buf->f_type = ISOFS_SUPER_MAGIC;
+ buf->f_bsize = sb->s_blocksize;
+ buf->f_blocks = (ISOFS_SB(sb)->s_nzones
+ << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits));
+ buf->f_bfree = 0;
+ buf->f_bavail = 0;
+ buf->f_files = ISOFS_SB(sb)->s_ninodes;
+ buf->f_ffree = 0;
+ buf->f_namelen = NAME_MAX;
+ return 0;
+}
+
+/*
+ * Get a set of blocks; filling in buffer_heads if already allocated
+ * or getblk() if they are not. Returns the number of blocks inserted
+ * (0 == error.)
+ */
+int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
+ struct buffer_head **bh, unsigned long nblocks)
+{
+ unsigned long b_off;
+ unsigned offset, sect_size;
+ unsigned int firstext;
+ unsigned long nextblk, nextoff;
+ long iblock = (long)iblock_s;
+ int section, rv;
+ struct iso_inode_info *ei = ISOFS_I(inode);
+
+ lock_kernel();
+
+ rv = 0;
+ if (iblock < 0 || iblock != iblock_s) {
+ printk("isofs_get_blocks: block number too large\n");
+ goto abort;
+ }
+
+ b_off = iblock;
+
+ offset = 0;
+ firstext = ei->i_first_extent;
+ sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode);
+ nextblk = ei->i_next_section_block;
+ nextoff = ei->i_next_section_offset;
+ section = 0;
+
+ while ( nblocks ) {
+ /* If we are *way* beyond the end of the file, print a message.
+ * Access beyond the end of the file up to the next page boundary
+ * is normal, however because of the way the page cache works.
+ * In this case, we just return 0 so that we can properly fill
+ * the page with useless information without generating any
+ * I/O errors.
+ */
+ if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) {
+ printk("isofs_get_blocks: block >= EOF (%ld, %ld)\n",
+ iblock, (unsigned long) inode->i_size);
+ goto abort;
+ }
+
+ if (nextblk) {
+ while (b_off >= (offset + sect_size)) {
+ struct inode *ninode;
+
+ offset += sect_size;
+ if (nextblk == 0)
+ goto abort;
+ ninode = isofs_iget(inode->i_sb, nextblk, nextoff);
+ if (!ninode)
+ goto abort;
+ firstext = ISOFS_I(ninode)->i_first_extent;
+ sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode);
+ nextblk = ISOFS_I(ninode)->i_next_section_block;
+ nextoff = ISOFS_I(ninode)->i_next_section_offset;
+ iput(ninode);
+
+ if (++section > 100) {
+ printk("isofs_get_blocks: More than 100 file sections ?!?, aborting...\n");
+ printk("isofs_get_blocks: block=%ld firstext=%u sect_size=%u "
+ "nextblk=%lu nextoff=%lu\n",
+ iblock, firstext, (unsigned) sect_size,
+ nextblk, nextoff);
+ goto abort;
+ }
+ }
+ }
+
+ if ( *bh ) {
+ map_bh(*bh, inode->i_sb, firstext + b_off - offset);
+ } else {
+ *bh = sb_getblk(inode->i_sb, firstext+b_off-offset);
+ if ( !*bh )
+ goto abort;
+ }
+ bh++; /* Next buffer head */
+ b_off++; /* Next buffer offset */
+ nblocks--;
+ rv++;
+ }
+
+
+abort:
+ unlock_kernel();
+ return rv;
+}
+
+/*
+ * Used by the standard interfaces.
+ */
+static int isofs_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
+{
+ if ( create ) {
+ printk("isofs_get_block: Kernel tries to allocate a block\n");
+ return -EROFS;
+ }
+
+ return isofs_get_blocks(inode, iblock, &bh_result, 1) ? 0 : -EIO;
+}
+
+static int isofs_bmap(struct inode *inode, sector_t block)
+{
+ struct buffer_head dummy;
+ int error;
+
+ dummy.b_state = 0;
+ dummy.b_blocknr = -1000;
+ error = isofs_get_block(inode, block, &dummy, 0);
+ if (!error)
+ return dummy.b_blocknr;
+ return 0;
+}
+
+struct buffer_head *isofs_bread(struct inode *inode, sector_t block)
+{
+ sector_t blknr = isofs_bmap(inode, block);
+ if (!blknr)
+ return NULL;
+ return sb_bread(inode->i_sb, blknr);
+}
+
+static int isofs_readpage(struct file *file, struct page *page)
+{
+ return block_read_full_page(page,isofs_get_block);
+}
+
+static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
+{
+ return generic_block_bmap(mapping,block,isofs_get_block);
+}
+
+static struct address_space_operations isofs_aops = {
+ .readpage = isofs_readpage,
+ .sync_page = block_sync_page,
+ .bmap = _isofs_bmap
+};
+
+static inline void test_and_set_uid(uid_t *p, uid_t value)
+{
+ if(value) {
+ *p = value;
+ }
+}
+
+static inline void test_and_set_gid(gid_t *p, gid_t value)
+{
+ if(value) {
+ *p = value;
+ }
+}
+
+static int isofs_read_level3_size(struct inode * inode)
+{
+ unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
+ int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra;
+ struct buffer_head * bh = NULL;
+ unsigned long block, offset, block_saved, offset_saved;
+ int i = 0;
+ int more_entries = 0;
+ struct iso_directory_record * tmpde = NULL;
+ struct iso_inode_info *ei = ISOFS_I(inode);
+
+ inode->i_size = 0;
+
+ /* The first 16 blocks are reserved as the System Area. Thus,
+ * no inodes can appear in block 0. We use this to flag that
+ * this is the last section. */
+ ei->i_next_section_block = 0;
+ ei->i_next_section_offset = 0;
+
+ block = ei->i_iget5_block;
+ offset = ei->i_iget5_offset;
+
+ do {
+ struct iso_directory_record * de;
+ unsigned int de_len;
+
+ if (!bh) {
+ bh = sb_bread(inode->i_sb, block);
+ if (!bh)
+ goto out_noread;
+ }
+ de = (struct iso_directory_record *) (bh->b_data + offset);
+ de_len = *(unsigned char *) de;
+
+ if (de_len == 0) {
+ brelse(bh);
+ bh = NULL;
+ ++block;
+ offset = 0;
+ continue;
+ }
+
+ block_saved = block;
+ offset_saved = offset;
+ offset += de_len;
+
+ /* Make sure we have a full directory entry */
+ if (offset >= bufsize) {
+ int slop = bufsize - offset + de_len;
+ if (!tmpde) {
+ tmpde = kmalloc(256, GFP_KERNEL);
+ if (!tmpde)
+ goto out_nomem;
+ }
+ memcpy(tmpde, de, slop);
+ offset &= bufsize - 1;
+ block++;
+ brelse(bh);
+ bh = NULL;
+ if (offset) {
+ bh = sb_bread(inode->i_sb, block);
+ if (!bh)
+ goto out_noread;
+ memcpy((void *) tmpde + slop, bh->b_data, offset);
+ }
+ de = tmpde;
+ }
+
+ inode->i_size += isonum_733(de->size);
+ if (i == 1) {
+ ei->i_next_section_block = block_saved;
+ ei->i_next_section_offset = offset_saved;
+ }
+
+ more_entries = de->flags[-high_sierra] & 0x80;
+
+ i++;
+ if(i > 100)
+ goto out_toomany;
+ } while(more_entries);
+out:
+ if (tmpde)
+ kfree(tmpde);
+ if (bh)
+ brelse(bh);
+ return 0;
+
+out_nomem:
+ if (bh)
+ brelse(bh);
+ return -ENOMEM;
+
+out_noread:
+ printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block);
+ if (tmpde)
+ kfree(tmpde);
+ return -EIO;
+
+out_toomany:
+ printk(KERN_INFO "isofs_read_level3_size: "
+ "More than 100 file sections ?!?, aborting...\n"
+ "isofs_read_level3_size: inode=%lu\n",
+ inode->i_ino);
+ goto out;
+}
+
+static void isofs_read_inode(struct inode * inode)
+{
+ struct super_block *sb = inode->i_sb;
+ struct isofs_sb_info *sbi = ISOFS_SB(sb);
+ unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
+ unsigned long block;
+ int high_sierra = sbi->s_high_sierra;
+ struct buffer_head * bh = NULL;
+ struct iso_directory_record * de;
+ struct iso_directory_record * tmpde = NULL;
+ unsigned int de_len;
+ unsigned long offset;
+ struct iso_inode_info *ei = ISOFS_I(inode);
+
+ block = ei->i_iget5_block;
+ bh = sb_bread(inode->i_sb, block);
+ if (!bh)
+ goto out_badread;
+
+ offset = ei->i_iget5_offset;
+
+ de = (struct iso_directory_record *) (bh->b_data + offset);
+ de_len = *(unsigned char *) de;
+
+ if (offset + de_len > bufsize) {
+ int frag1 = bufsize - offset;
+
+ tmpde = kmalloc(de_len, GFP_KERNEL);
+ if (tmpde == NULL) {
+ printk(KERN_INFO "isofs_read_inode: out of memory\n");
+ goto fail;
+ }
+ memcpy(tmpde, bh->b_data + offset, frag1);
+ brelse(bh);
+ bh = sb_bread(inode->i_sb, ++block);
+ if (!bh)
+ goto out_badread;
+ memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1);
+ de = tmpde;
+ }
+
+ inode->i_ino = isofs_get_ino(ei->i_iget5_block,
+ ei->i_iget5_offset,
+ ISOFS_BUFFER_BITS(inode));
+
+ /* Assume it is a normal-format file unless told otherwise */
+ ei->i_file_format = isofs_file_normal;
+
+ if (de->flags[-high_sierra] & 2) {
+ inode->i_mode = S_IRUGO | S_IXUGO | S_IFDIR;
+ inode->i_nlink = 1; /* Set to 1. We know there are 2, but
+ the find utility tries to optimize
+ if it is 2, and it screws up. It is
+ easier to give 1 which tells find to
+ do it the hard way. */
+ } else {
+ /* Everybody gets to read the file. */
+ inode->i_mode = sbi->s_mode;
+ inode->i_nlink = 1;
+ inode->i_mode |= S_IFREG;
+ }
+ inode->i_uid = sbi->s_uid;
+ inode->i_gid = sbi->s_gid;
+ inode->i_blocks = inode->i_blksize = 0;
+
+ ei->i_format_parm[0] = 0;
+ ei->i_format_parm[1] = 0;
+ ei->i_format_parm[2] = 0;
+
+ ei->i_section_size = isonum_733 (de->size);
+ if(de->flags[-high_sierra] & 0x80) {
+ if(isofs_read_level3_size(inode)) goto fail;
+ } else {
+ ei->i_next_section_block = 0;
+ ei->i_next_section_offset = 0;
+ inode->i_size = isonum_733 (de->size);
+ }
+
+ /*
+ * Some dipshit decided to store some other bit of information
+ * in the high byte of the file length. Truncate size in case
+ * this CDROM was mounted with the cruft option.
+ */
+
+ if (sbi->s_cruft == 'y')
+ inode->i_size &= 0x00ffffff;
+
+ if (de->interleave[0]) {
+ printk("Interleaved files not (yet) supported.\n");
+ inode->i_size = 0;
+ }
+
+ /* I have no idea what file_unit_size is used for, so
+ we will flag it for now */
+ if (de->file_unit_size[0] != 0) {
+ printk("File unit size != 0 for ISO file (%ld).\n",
+ inode->i_ino);
+ }
+
+ /* I have no idea what other flag bits are used for, so
+ we will flag it for now */
+#ifdef DEBUG
+ if((de->flags[-high_sierra] & ~2)!= 0){
+ printk("Unusual flag settings for ISO file (%ld %x).\n",
+ inode->i_ino, de->flags[-high_sierra]);
+ }
+#endif
+
+ inode->i_mtime.tv_sec =
+ inode->i_atime.tv_sec =
+ inode->i_ctime.tv_sec = iso_date(de->date, high_sierra);
+ inode->i_mtime.tv_nsec =
+ inode->i_atime.tv_nsec =
+ inode->i_ctime.tv_nsec = 0;
+
+ ei->i_first_extent = (isonum_733 (de->extent) +
+ isonum_711 (de->ext_attr_length));
+
+ /* Set the number of blocks for stat() - should be done before RR */
+ inode->i_blksize = PAGE_CACHE_SIZE; /* For stat() only */
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+
+ /*
+ * Now test for possible Rock Ridge extensions which will override
+ * some of these numbers in the inode structure.
+ */
+
+ if (!high_sierra) {
+ parse_rock_ridge_inode(de, inode);
+ /* if we want uid/gid set, override the rock ridge setting */
+ test_and_set_uid(&inode->i_uid, sbi->s_uid);
+ test_and_set_gid(&inode->i_gid, sbi->s_gid);
+ }
+
+ /* Install the inode operations vector */
+ if (S_ISREG(inode->i_mode)) {
+ inode->i_fop = &generic_ro_fops;
+ switch ( ei->i_file_format ) {
+#ifdef CONFIG_ZISOFS
+ case isofs_file_compressed:
+ inode->i_data.a_ops = &zisofs_aops;
+ break;
+#endif
+ default:
+ inode->i_data.a_ops = &isofs_aops;
+ break;
+ }
+ } else if (S_ISDIR(inode->i_mode)) {
+ inode->i_op = &isofs_dir_inode_operations;
+ inode->i_fop = &isofs_dir_operations;
+ } else if (S_ISLNK(inode->i_mode)) {
+ inode->i_op = &page_symlink_inode_operations;
+ inode->i_data.a_ops = &isofs_symlink_aops;
+ } else
+ /* XXX - parse_rock_ridge_inode() had already set i_rdev. */
+ init_special_inode(inode, inode->i_mode, inode->i_rdev);
+
+ out:
+ if (tmpde)
+ kfree(tmpde);
+ if (bh)
+ brelse(bh);
+ return;
+
+ out_badread:
+ printk(KERN_WARNING "ISOFS: unable to read i-node block\n");
+ fail:
+ make_bad_inode(inode);
+ goto out;
+}
+
+struct isofs_iget5_callback_data {
+ unsigned long block;
+ unsigned long offset;
+};
+
+static int isofs_iget5_test(struct inode *ino, void *data)
+{
+ struct iso_inode_info *i = ISOFS_I(ino);
+ struct isofs_iget5_callback_data *d =
+ (struct isofs_iget5_callback_data*)data;
+ return (i->i_iget5_block == d->block)
+ && (i->i_iget5_offset == d->offset);
+}
+
+static int isofs_iget5_set(struct inode *ino, void *data)
+{
+ struct iso_inode_info *i = ISOFS_I(ino);
+ struct isofs_iget5_callback_data *d =
+ (struct isofs_iget5_callback_data*)data;
+ i->i_iget5_block = d->block;
+ i->i_iget5_offset = d->offset;
+ return 0;
+}
+
+/* Store, in the inode's containing structure, the block and block
+ * offset that point to the underlying meta-data for the inode. The
+ * code below is otherwise similar to the iget() code in
+ * include/linux/fs.h */
+struct inode *isofs_iget(struct super_block *sb,
+ unsigned long block,
+ unsigned long offset)
+{
+ unsigned long hashval;
+ struct inode *inode;
+ struct isofs_iget5_callback_data data;
+
+ if (offset >= 1ul << sb->s_blocksize_bits)
+ return NULL;
+
+ data.block = block;
+ data.offset = offset;
+
+ hashval = (block << sb->s_blocksize_bits) | offset;
+
+ inode = iget5_locked(sb,
+ hashval,
+ &isofs_iget5_test,
+ &isofs_iget5_set,
+ &data);
+
+ if (inode && (inode->i_state & I_NEW)) {
+ sb->s_op->read_inode(inode);
+ unlock_new_inode(inode);
+ }
+
+ return inode;
+}
+
+#ifdef LEAK_CHECK
+#undef malloc
+#undef free_s
+#undef sb_bread
+#undef brelse
+
+void * leak_check_malloc(unsigned int size){
+ void * tmp;
+ check_malloc++;
+ tmp = kmalloc(size, GFP_KERNEL);
+ return tmp;
+}
+
+void leak_check_free_s(void * obj, int size){
+ check_malloc--;
+ return kfree(obj);
+}
+
+struct buffer_head * leak_check_bread(struct super_block *sb, int block){
+ check_bread++;
+ return sb_bread(sb, block);
+}
+
+void leak_check_brelse(struct buffer_head * bh){
+ check_bread--;
+ return brelse(bh);
+}
+
+#endif
+
+static struct super_block *isofs_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
+{
+ return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super);
+}
+
+static struct file_system_type iso9660_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "iso9660",
+ .get_sb = isofs_get_sb,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+
+static int __init init_iso9660_fs(void)
+{
+ int err = init_inodecache();
+ if (err)
+ goto out;
+#ifdef CONFIG_ZISOFS
+ err = zisofs_init();
+ if (err)
+ goto out1;
+#endif
+ err = register_filesystem(&iso9660_fs_type);
+ if (err)
+ goto out2;
+ return 0;
+out2:
+#ifdef CONFIG_ZISOFS
+ zisofs_cleanup();
+out1:
+#endif
+ destroy_inodecache();
+out:
+ return err;
+}
+
+static void __exit exit_iso9660_fs(void)
+{
+ unregister_filesystem(&iso9660_fs_type);
+#ifdef CONFIG_ZISOFS
+ zisofs_cleanup();
+#endif
+ destroy_inodecache();
+}
+
+module_init(init_iso9660_fs)
+module_exit(exit_iso9660_fs)
+MODULE_LICENSE("GPL");
+/* Actual filesystem name is iso9660, as requested in filesystems.c */
+MODULE_ALIAS("iso9660");
diff --git a/fs/isofs/joliet.c b/fs/isofs/joliet.c
new file mode 100644
index 0000000..86c50e2
--- /dev/null
+++ b/fs/isofs/joliet.c
@@ -0,0 +1,103 @@
+/*
+ * linux/fs/isofs/joliet.c
+ *
+ * (C) 1996 Gordon Chaffee
+ *
+ * Joliet: Microsoft's Unicode extensions to iso9660
+ */
+
+#include <linux/string.h>
+#include <linux/nls.h>
+#include <linux/mm.h>
+#include <linux/iso_fs.h>
+#include <asm/unaligned.h>
+
+/*
+ * Convert Unicode 16 to UTF8 or ASCII.
+ */
+static int
+uni16_to_x8(unsigned char *ascii, u16 *uni, int len, struct nls_table *nls)
+{
+ wchar_t *ip, ch;
+ unsigned char *op;
+
+ ip = uni;
+ op = ascii;
+
+ while ((ch = get_unaligned(ip)) && len) {
+ int llen;
+ ch = be16_to_cpu(ch);
+ if ((llen = nls->uni2char(ch, op, NLS_MAX_CHARSET_SIZE)) > 0)
+ op += llen;
+ else
+ *op++ = '?';
+ ip++;
+
+ len--;
+ }
+ *op = 0;
+ return (op - ascii);
+}
+
+/* Convert big endian wide character string to utf8 */
+static int
+wcsntombs_be(__u8 *s, const __u8 *pwcs, int inlen, int maxlen)
+{
+ const __u8 *ip;
+ __u8 *op;
+ int size;
+ __u16 c;
+
+ op = s;
+ ip = pwcs;
+ while ((*ip || ip[1]) && (maxlen > 0) && (inlen > 0)) {
+ c = (*ip << 8) | ip[1];
+ if (c > 0x7f) {
+ size = utf8_wctomb(op, c, maxlen);
+ if (size == -1) {
+ /* Ignore character and move on */
+ maxlen--;
+ } else {
+ op += size;
+ maxlen -= size;
+ }
+ } else {
+ *op++ = (__u8) c;
+ }
+ ip += 2;
+ inlen--;
+ }
+ return (op - s);
+}
+
+int
+get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode)
+{
+ unsigned char utf8;
+ struct nls_table *nls;
+ unsigned char len = 0;
+
+ utf8 = ISOFS_SB(inode->i_sb)->s_utf8;
+ nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset;
+
+ if (utf8) {
+ len = wcsntombs_be(outname, de->name,
+ de->name_len[0] >> 1, PAGE_SIZE);
+ } else {
+ len = uni16_to_x8(outname, (u16 *) de->name,
+ de->name_len[0] >> 1, nls);
+ }
+ if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1')) {
+ len -= 2;
+ }
+
+ /*
+ * Windows doesn't like periods at the end of a name,
+ * so neither do we
+ */
+ while (len >= 2 && (outname[len-1] == '.')) {
+ len--;
+ }
+
+ return len;
+}
diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c
new file mode 100644
index 0000000..9569fc4
--- /dev/null
+++ b/fs/isofs/namei.c
@@ -0,0 +1,201 @@
+/*
+ * linux/fs/isofs/namei.c
+ *
+ * (C) 1992 Eric Youngdale Modified for ISO 9660 filesystem.
+ *
+ * (C) 1991 Linus Torvalds - minix filesystem
+ */
+
+#include <linux/time.h>
+#include <linux/iso_fs.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/config.h> /* Joliet? */
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+#include <linux/dcache.h>
+
+#include <asm/uaccess.h>
+
+/*
+ * ok, we cannot use strncmp, as the name is not in our data space.
+ * Thus we'll have to use isofs_match. No big problem. Match also makes
+ * some sanity tests.
+ */
+static int
+isofs_cmp(struct dentry * dentry, const char * compare, int dlen)
+{
+ struct qstr qstr;
+
+ if (!compare)
+ return 1;
+
+ /* check special "." and ".." files */
+ if (dlen == 1) {
+ /* "." */
+ if (compare[0] == 0) {
+ if (!dentry->d_name.len)
+ return 0;
+ compare = ".";
+ } else if (compare[0] == 1) {
+ compare = "..";
+ dlen = 2;
+ }
+ }
+
+ qstr.name = compare;
+ qstr.len = dlen;
+ return dentry->d_op->d_compare(dentry, &dentry->d_name, &qstr);
+}
+
+/*
+ * isofs_find_entry()
+ *
+ * finds an entry in the specified directory with the wanted name. It
+ * returns the inode number of the found entry, or 0 on error.
+ */
+static unsigned long
+isofs_find_entry(struct inode *dir, struct dentry *dentry,
+ unsigned long *block_rv, unsigned long* offset_rv,
+ char * tmpname, struct iso_directory_record * tmpde)
+{
+ unsigned long bufsize = ISOFS_BUFFER_SIZE(dir);
+ unsigned char bufbits = ISOFS_BUFFER_BITS(dir);
+ unsigned long block, f_pos, offset, block_saved, offset_saved;
+ struct buffer_head * bh = NULL;
+ struct isofs_sb_info *sbi = ISOFS_SB(dir->i_sb);
+
+ if (!ISOFS_I(dir)->i_first_extent)
+ return 0;
+
+ f_pos = 0;
+ offset = 0;
+ block = 0;
+
+ while (f_pos < dir->i_size) {
+ struct iso_directory_record * de;
+ int de_len, match, i, dlen;
+ char *dpnt;
+
+ if (!bh) {
+ bh = isofs_bread(dir, block);
+ if (!bh)
+ return 0;
+ }
+
+ de = (struct iso_directory_record *) (bh->b_data + offset);
+
+ de_len = *(unsigned char *) de;
+ if (!de_len) {
+ brelse(bh);
+ bh = NULL;
+ f_pos = (f_pos + ISOFS_BLOCK_SIZE) & ~(ISOFS_BLOCK_SIZE - 1);
+ block = f_pos >> bufbits;
+ offset = 0;
+ continue;
+ }
+
+ block_saved = bh->b_blocknr;
+ offset_saved = offset;
+ offset += de_len;
+ f_pos += de_len;
+
+ /* Make sure we have a full directory entry */
+ if (offset >= bufsize) {
+ int slop = bufsize - offset + de_len;
+ memcpy(tmpde, de, slop);
+ offset &= bufsize - 1;
+ block++;
+ brelse(bh);
+ bh = NULL;
+ if (offset) {
+ bh = isofs_bread(dir, block);
+ if (!bh)
+ return 0;
+ memcpy((void *) tmpde + slop, bh->b_data, offset);
+ }
+ de = tmpde;
+ }
+
+ dlen = de->name_len[0];
+ dpnt = de->name;
+
+ if (sbi->s_rock &&
+ ((i = get_rock_ridge_filename(de, tmpname, dir)))) {
+ dlen = i; /* possibly -1 */
+ dpnt = tmpname;
+#ifdef CONFIG_JOLIET
+ } else if (sbi->s_joliet_level) {
+ dlen = get_joliet_filename(de, tmpname, dir);
+ dpnt = tmpname;
+#endif
+ } else if (sbi->s_mapping == 'a') {
+ dlen = get_acorn_filename(de, tmpname, dir);
+ dpnt = tmpname;
+ } else if (sbi->s_mapping == 'n') {
+ dlen = isofs_name_translate(de, tmpname, dir);
+ dpnt = tmpname;
+ }
+
+ /*
+ * Skip hidden or associated files unless unhide is set
+ */
+ match = 0;
+ if (dlen > 0 &&
+ (!(de->flags[-sbi->s_high_sierra] & 5)
+ || sbi->s_unhide == 'y'))
+ {
+ match = (isofs_cmp(dentry,dpnt,dlen) == 0);
+ }
+ if (match) {
+ isofs_normalize_block_and_offset(de,
+ &block_saved,
+ &offset_saved);
+ *block_rv = block_saved;
+ *offset_rv = offset_saved;
+ if (bh) brelse(bh);
+ return 1;
+ }
+ }
+ if (bh) brelse(bh);
+ return 0;
+}
+
+struct dentry *isofs_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+{
+ int found;
+ unsigned long block, offset;
+ struct inode *inode;
+ struct page *page;
+
+ dentry->d_op = dir->i_sb->s_root->d_op;
+
+ page = alloc_page(GFP_USER);
+ if (!page)
+ return ERR_PTR(-ENOMEM);
+
+ lock_kernel();
+ found = isofs_find_entry(dir, dentry,
+ &block, &offset,
+ page_address(page),
+ 1024 + page_address(page));
+ __free_page(page);
+
+ inode = NULL;
+ if (found) {
+ inode = isofs_iget(dir->i_sb, block, offset);
+ if (!inode) {
+ unlock_kernel();
+ return ERR_PTR(-EACCES);
+ }
+ }
+ unlock_kernel();
+ if (inode)
+ return d_splice_alias(inode, dentry);
+ d_add(dentry, inode);
+ return NULL;
+}
diff --git a/fs/isofs/rock.c b/fs/isofs/rock.c
new file mode 100644
index 0000000..8bdd3e4
--- /dev/null
+++ b/fs/isofs/rock.c
@@ -0,0 +1,565 @@
+/*
+ * linux/fs/isofs/rock.c
+ *
+ * (C) 1992, 1993 Eric Youngdale
+ *
+ * Rock Ridge Extensions to iso9660
+ */
+
+#include <linux/stat.h>
+#include <linux/time.h>
+#include <linux/iso_fs.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+#include <asm/page.h>
+
+#include "rock.h"
+
+/* These functions are designed to read the system areas of a directory record
+ * and extract relevant information. There are different functions provided
+ * 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
+ * returns a symbolic link name, and a fourth one returns the extent number
+ * for the file. */
+
+#define SIG(A,B) ((A) | ((B) << 8)) /* isonum_721() */
+
+
+/* This is a way of ensuring that we have something in the system
+ use fields that is compatible with Rock Ridge */
+#define CHECK_SP(FAIL) \
+ if(rr->u.SP.magic[0] != 0xbe) FAIL; \
+ if(rr->u.SP.magic[1] != 0xef) FAIL; \
+ ISOFS_SB(inode->i_sb)->s_rock_offset=rr->u.SP.skip;
+/* 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
+ is done correctly */
+
+#define CONTINUE_DECLS \
+ int cont_extent = 0, cont_offset = 0, cont_size = 0; \
+ void *buffer = NULL
+
+#define CHECK_CE \
+ {cont_extent = isonum_733(rr->u.CE.extent); \
+ cont_offset = isonum_733(rr->u.CE.offset); \
+ cont_size = isonum_733(rr->u.CE.size);}
+
+#define SETUP_ROCK_RIDGE(DE,CHR,LEN) \
+ {LEN= sizeof(struct iso_directory_record) + DE->name_len[0]; \
+ if(LEN & 1) LEN++; \
+ CHR = ((unsigned char *) DE) + LEN; \
+ LEN = *((unsigned char *) DE) - LEN; \
+ if (LEN<0) LEN=0; \
+ if (ISOFS_SB(inode->i_sb)->s_rock_offset!=-1) \
+ { \
+ LEN-=ISOFS_SB(inode->i_sb)->s_rock_offset; \
+ CHR+=ISOFS_SB(inode->i_sb)->s_rock_offset; \
+ if (LEN<0) LEN=0; \
+ } \
+}
+
+#define MAYBE_CONTINUE(LABEL,DEV) \
+ {if (buffer) { kfree(buffer); buffer = NULL; } \
+ if (cont_extent){ \
+ int block, offset, offset1; \
+ struct buffer_head * pbh; \
+ buffer = kmalloc(cont_size,GFP_KERNEL); \
+ if (!buffer) goto out; \
+ block = cont_extent; \
+ offset = cont_offset; \
+ offset1 = 0; \
+ pbh = sb_bread(DEV->i_sb, block); \
+ if(pbh){ \
+ if (offset > pbh->b_size || offset + cont_size > pbh->b_size){ \
+ brelse(pbh); \
+ goto out; \
+ } \
+ memcpy(buffer + offset1, pbh->b_data + offset, cont_size - offset1); \
+ brelse(pbh); \
+ chr = (unsigned char *) buffer; \
+ len = cont_size; \
+ cont_extent = 0; \
+ cont_size = 0; \
+ cont_offset = 0; \
+ goto LABEL; \
+ } \
+ printk("Unable to read rock-ridge attributes\n"); \
+ }}
+
+/* return length of name field; 0: not found, -1: to be ignored */
+int get_rock_ridge_filename(struct iso_directory_record * de,
+ char * retname, struct inode * inode)
+{
+ int len;
+ unsigned char * chr;
+ CONTINUE_DECLS;
+ int retnamlen = 0, 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;
+ break;
+ case SIG('S','P'):
+ CHECK_SP(goto out);
+ break;
+ case SIG('C','E'):
+ CHECK_CE;
+ 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;
+ break;
+ case SIG('R','E'):
+ if (buffer) kfree(buffer);
+ return -1;
+ default:
+ break;
+ }
+ }
+ }
+ MAYBE_CONTINUE(repeat,inode);
+ if (buffer) kfree(buffer);
+ return retnamlen; /* If 0, this file did not have a NM field */
+ out:
+ if(buffer) kfree(buffer);
+ return 0;
+}
+
+static int
+parse_rock_ridge_inode_internal(struct iso_directory_record *de,
+ struct inode *inode, int regard_xa)
+{
+ int len;
+ unsigned char * chr;
+ int symlink_len = 0;
+ CONTINUE_DECLS;
+
+ if (!ISOFS_SB(inode->i_sb)->s_rock) return 0;
+
+ SETUP_ROCK_RIDGE(de, chr, len);
+ if (regard_xa)
+ {
+ chr+=14;
+ len-=14;
+ if (len<0) 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){
+#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;
+#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]);
+ }
+ 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. */
+ 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:
+ 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;
+ }
+ }
+ 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;
+ 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:
+ break;
+ }
+ }
+ }
+ MAYBE_CONTINUE(repeat,inode);
+ out:
+ if(buffer) kfree(buffer);
+ return 0;
+}
+
+static char *get_symlink_chunk(char *rpnt, struct rock_ridge *rr, char *plimit)
+{
+ int slen;
+ int rootflag;
+ struct SL_component *oldslp;
+ struct SL_component *slp;
+ slen = rr->len - 5;
+ slp = &rr->u.SL.link;
+ while (slen > 1) {
+ rootflag = 0;
+ switch (slp->flags & ~1) {
+ case 0:
+ if (slp->len > plimit - rpnt)
+ return NULL;
+ memcpy(rpnt, slp->text, slp->len);
+ rpnt+=slp->len;
+ break;
+ case 2:
+ if (rpnt >= plimit)
+ return NULL;
+ *rpnt++='.';
+ break;
+ case 4:
+ if (2 > plimit - rpnt)
+ return NULL;
+ *rpnt++='.';
+ *rpnt++='.';
+ break;
+ case 8:
+ if (rpnt >= plimit)
+ return NULL;
+ rootflag = 1;
+ *rpnt++='/';
+ break;
+ default:
+ printk("Symlink component flag not implemented (%d)\n",
+ slp->flags);
+ }
+ slen -= slp->len + 2;
+ oldslp = slp;
+ slp = (struct SL_component *) ((char *) slp + slp->len + 2);
+
+ if (slen < 2) {
+ /*
+ * If there is another SL record, and this component
+ * record isn't continued, then add a slash.
+ */
+ if ((!rootflag) && (rr->u.SL.flags & 1) &&
+ !(oldslp->flags & 1)) {
+ if (rpnt >= plimit)
+ return NULL;
+ *rpnt++='/';
+ }
+ break;
+ }
+
+ /*
+ * If this component record isn't continued, then append a '/'.
+ */
+ if (!rootflag && !(oldslp->flags & 1)) {
+ if (rpnt >= plimit)
+ return NULL;
+ *rpnt++='/';
+ }
+ }
+ return rpnt;
+}
+
+int parse_rock_ridge_inode(struct iso_directory_record * de,
+ struct inode * inode)
+{
+ int result=parse_rock_ridge_inode_internal(de,inode,0);
+ /* if rockridge flag was reset and we didn't look for attributes
+ * behind eventual XA attributes, have a look there */
+ if ((ISOFS_SB(inode->i_sb)->s_rock_offset==-1)
+ &&(ISOFS_SB(inode->i_sb)->s_rock==2))
+ {
+ result=parse_rock_ridge_inode_internal(de,inode,14);
+ }
+ return result;
+}
+
+/* readpage() for symlinks: reads symlink contents into the page and either
+ makes it uptodate and returns 0 or returns error (-EIO) */
+
+static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
+{
+ struct inode *inode = page->mapping->host;
+ struct iso_inode_info *ei = ISOFS_I(inode);
+ char *link = kmap(page);
+ unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
+ struct buffer_head *bh;
+ char *rpnt = link;
+ unsigned char *pnt;
+ struct iso_directory_record *raw_inode;
+ CONTINUE_DECLS;
+ unsigned long block, offset;
+ int sig;
+ int len;
+ unsigned char *chr;
+ struct rock_ridge *rr;
+
+ if (!ISOFS_SB(inode->i_sb)->s_rock)
+ goto error;
+
+ block = ei->i_iget5_block;
+ lock_kernel();
+ bh = sb_bread(inode->i_sb, block);
+ if (!bh)
+ goto out_noread;
+
+ offset = ei->i_iget5_offset;
+ pnt = (unsigned char *) bh->b_data + offset;
+
+ raw_inode = (struct iso_directory_record *) pnt;
+
+ /*
+ * If we go past the end of the buffer, there is some sort of error.
+ */
+ if (offset + *pnt > bufsize)
+ goto out_bad_span;
+
+ /* Now test for possible Rock Ridge extensions which will override
+ some of these numbers in the inode structure. */
+
+ SETUP_ROCK_RIDGE(raw_inode, chr, len);
+
+ 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_SL) == 0)
+ goto out;
+ break;
+ case SIG('S', 'P'):
+ CHECK_SP(goto out);
+ break;
+ case SIG('S', 'L'):
+ rpnt = get_symlink_chunk(rpnt, rr,
+ link + (PAGE_SIZE - 1));
+ if (rpnt == NULL)
+ goto out;
+ break;
+ case SIG('C', 'E'):
+ /* This tells is if there is a continuation record */
+ CHECK_CE;
+ default:
+ break;
+ }
+ }
+ MAYBE_CONTINUE(repeat, inode);
+ if (buffer)
+ kfree(buffer);
+
+ if (rpnt == link)
+ goto fail;
+ brelse(bh);
+ *rpnt = '\0';
+ unlock_kernel();
+ SetPageUptodate(page);
+ kunmap(page);
+ unlock_page(page);
+ return 0;
+
+ /* error exit from macro */
+ out:
+ if (buffer)
+ kfree(buffer);
+ goto fail;
+ out_noread:
+ printk("unable to read i-node block");
+ goto fail;
+ out_bad_span:
+ printk("symlink spans iso9660 blocks\n");
+ fail:
+ brelse(bh);
+ unlock_kernel();
+ error:
+ SetPageError(page);
+ kunmap(page);
+ unlock_page(page);
+ return -EIO;
+}
+
+struct address_space_operations isofs_symlink_aops = {
+ .readpage = rock_ridge_symlink_readpage
+};
diff --git a/fs/isofs/rock.h b/fs/isofs/rock.h
new file mode 100644
index 0000000..deaf5c8
--- /dev/null
+++ b/fs/isofs/rock.h
@@ -0,0 +1,119 @@
+/* These structs are used by the system-use-sharing protocol, in which the
+ Rock Ridge extensions are embedded. It is quite possible that other
+ extensions are present on the disk, and this is fine as long as they
+ all use SUSP */
+
+struct SU_SP{
+ unsigned char magic[2];
+ unsigned char skip;
+} __attribute__((packed));
+
+struct SU_CE{
+ char extent[8];
+ char offset[8];
+ char size[8];
+};
+
+struct SU_ER{
+ unsigned char len_id;
+ unsigned char len_des;
+ unsigned char len_src;
+ unsigned char ext_ver;
+ char data[0];
+} __attribute__((packed));
+
+struct RR_RR{
+ char flags[1];
+} __attribute__((packed));
+
+struct RR_PX{
+ char mode[8];
+ char n_links[8];
+ char uid[8];
+ char gid[8];
+};
+
+struct RR_PN{
+ char dev_high[8];
+ char dev_low[8];
+};
+
+
+struct SL_component{
+ unsigned char flags;
+ unsigned char len;
+ char text[0];
+} __attribute__((packed));
+
+struct RR_SL{
+ unsigned char flags;
+ struct SL_component link;
+} __attribute__((packed));
+
+struct RR_NM{
+ unsigned char flags;
+ char name[0];
+} __attribute__((packed));
+
+struct RR_CL{
+ char location[8];
+};
+
+struct RR_PL{
+ char location[8];
+};
+
+struct stamp{
+ char time[7];
+} __attribute__((packed));
+
+struct RR_TF{
+ char flags;
+ struct stamp times[0]; /* Variable number of these beasts */
+} __attribute__((packed));
+
+/* Linux-specific extension for transparent decompression */
+struct RR_ZF{
+ char algorithm[2];
+ char parms[2];
+ char real_size[8];
+};
+
+/* These are the bits and their meanings for flags in the TF structure. */
+#define TF_CREATE 1
+#define TF_MODIFY 2
+#define TF_ACCESS 4
+#define TF_ATTRIBUTES 8
+#define TF_BACKUP 16
+#define TF_EXPIRATION 32
+#define TF_EFFECTIVE 64
+#define TF_LONG_FORM 128
+
+struct rock_ridge{
+ char signature[2];
+ unsigned char len;
+ unsigned char version;
+ union{
+ struct SU_SP SP;
+ struct SU_CE CE;
+ struct SU_ER ER;
+ struct RR_RR RR;
+ struct RR_PX PX;
+ struct RR_PN PN;
+ struct RR_SL SL;
+ struct RR_NM NM;
+ struct RR_CL CL;
+ struct RR_PL PL;
+ struct RR_TF TF;
+ struct RR_ZF ZF;
+ } u;
+};
+
+#define RR_PX 1 /* POSIX attributes */
+#define RR_PN 2 /* POSIX devices */
+#define RR_SL 4 /* Symbolic link */
+#define RR_NM 8 /* Alternate Name */
+#define RR_CL 16 /* Child link */
+#define RR_PL 32 /* Parent link */
+#define RR_RE 64 /* Relocation directory */
+#define RR_TF 128 /* Timestamps */
diff --git a/fs/isofs/util.c b/fs/isofs/util.c
new file mode 100644
index 0000000..3f6d9c1
--- /dev/null
+++ b/fs/isofs/util.c
@@ -0,0 +1,83 @@
+/*
+ * linux/fs/isofs/util.c
+ */
+
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/iso_fs.h>
+
+/*
+ * We have to convert from a MM/DD/YY format to the Unix ctime format.
+ * We have to take into account leap years and all of that good stuff.
+ * Unfortunately, the kernel does not have the information on hand to
+ * take into account daylight savings time, but it shouldn't matter.
+ * The time stored should be localtime (with or without DST in effect),
+ * and the timezone offset should hold the offset required to get back
+ * to GMT. Thus we should always be correct.
+ */
+
+int iso_date(char * p, int flag)
+{
+ int year, month, day, hour, minute, second, tz;
+ int crtime, days, i;
+
+ year = p[0] - 70;
+ month = p[1];
+ day = p[2];
+ hour = p[3];
+ minute = p[4];
+ second = p[5];
+ if (flag == 0) tz = p[6]; /* High sierra has no time zone */
+ else tz = 0;
+
+ if (year < 0) {
+ crtime = 0;
+ } else {
+ int monlen[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
+
+ days = year * 365;
+ if (year > 2)
+ days += (year+1) / 4;
+ for (i = 1; i < month; i++)
+ days += monlen[i-1];
+ if (((year+2) % 4) == 0 && month > 2)
+ days++;
+ days += day - 1;
+ crtime = ((((days * 24) + hour) * 60 + minute) * 60)
+ + second;
+
+ /* sign extend */
+ if (tz & 0x80)
+ tz |= (-1 << 8);
+
+ /*
+ * The timezone offset is unreliable on some disks,
+ * so we make a sanity check. In no case is it ever
+ * more than 13 hours from GMT, which is 52*15min.
+ * The time is always stored in localtime with the
+ * timezone offset being what get added to GMT to
+ * get to localtime. Thus we need to subtract the offset
+ * to get to true GMT, which is what we store the time
+ * as internally. On the local system, the user may set
+ * their timezone any way they wish, of course, so GMT
+ * gets converted back to localtime on the receiving
+ * system.
+ *
+ * NOTE: mkisofs in versions prior to mkisofs-1.10 had
+ * the sign wrong on the timezone offset. This has now
+ * been corrected there too, but if you are getting screwy
+ * results this may be the explanation. If enough people
+ * complain, a user configuration option could be added
+ * to add the timezone offset in with the wrong sign
+ * for 'compatibility' with older discs, but I cannot see how
+ * it will matter that much.
+ *
+ * Thanks to kuhlmav@elec.canterbury.ac.nz (Volker Kuhlmann)
+ * for pointing out the sign error.
+ */
+ if (-52 <= tz && tz <= 52)
+ crtime -= tz * 15 * 60;
+ }
+ return crtime;
+}
+
diff --git a/fs/isofs/zisofs.h b/fs/isofs/zisofs.h
new file mode 100644
index 0000000..d78485d
--- /dev/null
+++ b/fs/isofs/zisofs.h
@@ -0,0 +1,21 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2001 H. Peter Anvin - All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
+ * USA; either version 2 of the License, or (at your option) any later
+ * version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * Prototypes for functions exported from the compressed isofs subsystem
+ */
+
+#ifdef CONFIG_ZISOFS
+extern struct address_space_operations zisofs_aops;
+extern int __init zisofs_init(void);
+extern void zisofs_cleanup(void);
+#endif
generated by cgit v1.1 at 2024-12-24 02:55:17 +0000