fs: initial qnx6fs addition
Adds support for qnx6fs readonly support to the linux kernel.
* Mount option
The option mmi_fs can be used to mount Harman Becker/Audi MMI 3G
HDD qnx6fs filesystems.
* Documentation
A high level filesystem stucture description can be found in the
Documentation/filesystems directory. (qnx6.txt)
* Additional features
- Active (stable) superblock selection
- Superblock checksum check (enforced)
- Supports mount of qnx6 filesystems with to host different endianess
- Automatic endianess detection
- Longfilename support (with non-enfocing crc check)
- All blocksizes (512, 1024, 2048 and 4096 supported)
Signed-off-by: Kai Bankett <chaosman@ontika.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/qnx6/namei.c b/fs/qnx6/namei.c
new file mode 100644
index 0000000..8a97289
--- /dev/null
+++ b/fs/qnx6/namei.c
@@ -0,0 +1,42 @@
+/*
+ * QNX6 file system, Linux implementation.
+ *
+ * Version : 1.0.0
+ *
+ * History :
+ *
+ * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release.
+ * 16-02-2012 pagemap extension by Al Viro
+ *
+ */
+
+#include "qnx6.h"
+
+struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd)
+{
+ unsigned ino;
+ struct page *page;
+ struct inode *foundinode = NULL;
+ const char *name = dentry->d_name.name;
+ int len = dentry->d_name.len;
+
+ if (len > QNX6_LONG_NAME_MAX)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ ino = qnx6_find_entry(len, dir, name, &page);
+ if (ino) {
+ foundinode = qnx6_iget(dir->i_sb, ino);
+ qnx6_put_page(page);
+ if (IS_ERR(foundinode)) {
+ QNX6DEBUG((KERN_ERR "qnx6: lookup->iget -> "
+ " error %ld\n", PTR_ERR(foundinode)));
+ return ERR_CAST(foundinode);
+ }
+ } else {
+ QNX6DEBUG((KERN_INFO "qnx6_lookup: not found %s\n", name));
+ return NULL;
+ }
+ d_add(dentry, foundinode);
+ return NULL;
+}
