Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 201 insertions, 0 deletions

diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c
new file mode 100644
index 000000000000..9569fc44102d
--- /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;
+}