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, 123 insertions, 0 deletions

diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c
new file mode 100644
index 000000000000..43f3051ef756
--- /dev/null
+++ b/fs/udf/symlink.c
@@ -0,0 +1,123 @@
+/*
+ * symlink.c
+ *
+ * PURPOSE
+ *      Symlink handling routines for the OSTA-UDF(tm) filesystem.
+ *
+ * CONTACTS
+ *      E-mail regarding any portion of the Linux UDF file system should be
+ *      directed to the development team mailing list (run by majordomo):
+ *              linux_udf@hpesjro.fc.hp.com
+ *
+ * COPYRIGHT
+ *      This file is distributed under the terms of the GNU General Public
+ *      License (GPL). Copies of the GPL can be obtained from:
+ *              ftp://prep.ai.mit.edu/pub/gnu/GPL
+ *      Each contributing author retains all rights to their own work.
+ *
+ *  (C) 1998-2001 Ben Fennema
+ *  (C) 1999 Stelias Computing Inc 
+ *
+ * HISTORY
+ *
+ *  04/16/99 blf  Created.
+ *
+ */
+
+#include "udfdecl.h"
+#include <asm/uaccess.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/udf_fs.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+#include "udf_i.h"
+
+static void udf_pc_to_char(struct super_block *sb, char *from, int fromlen, char *to)
+{
+        struct pathComponent *pc;
+        int elen = 0;
+        char *p = to;
+
+        while (elen < fromlen)
+        {
+                pc = (struct pathComponent *)(from + elen);
+                switch (pc->componentType)
+                {
+                        case 1:
+                                if (pc->lengthComponentIdent == 0)
+                                {
+                                        p = to;
+                                        *p++ = '/';
+                                }
+                                break;
+                        case 3:
+                                memcpy(p, "../", 3);
+                                p += 3;
+                                break;
+                        case 4:
+                                memcpy(p, "./", 2);
+                                p += 2;
+                                /* that would be . - just ignore */
+                                break;
+                        case 5:
+                                p += udf_get_filename(sb, pc->componentIdent, p, pc->lengthComponentIdent);
+                                *p++ = '/';
+                                break;
+                }
+                elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
+        }
+        if (p > to+1)
+                p[-1] = '\0';
+        else
+                p[0] = '\0';
+}
+
+static int udf_symlink_filler(struct file *file, struct page *page)
+{
+        struct inode *inode = page->mapping->host;
+        struct buffer_head *bh = NULL;
+        char *symlink;
+        int err = -EIO;
+        char *p = kmap(page);
+
+        lock_kernel();
+        if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
+                symlink = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode);
+        else
+        {
+                bh = sb_bread(inode->i_sb, udf_block_map(inode, 0));
+
+                if (!bh)
+                        goto out;
+
+                symlink = bh->b_data;
+        }
+
+        udf_pc_to_char(inode->i_sb, symlink, inode->i_size, p);
+        udf_release_data(bh);
+
+        unlock_kernel();
+        SetPageUptodate(page);
+        kunmap(page);
+        unlock_page(page);
+        return 0;
+out:
+        unlock_kernel();
+        SetPageError(page);
+        kunmap(page);
+        unlock_page(page);
+        return err;
+}
+
+/*
+ * symlinks can't do much...
+ */
+struct address_space_operations udf_symlink_aops = {
+        .readpage               = udf_symlink_filler,
+};