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/qnx6.h b/fs/qnx6/qnx6.h
new file mode 100644
index 0000000..6c5e02a
--- /dev/null
+++ b/fs/qnx6/qnx6.h
@@ -0,0 +1,135 @@
+/*
+ * QNX6 file system, Linux implementation.
+ *
+ * Version : 1.0.0
+ *
+ * History :
+ *
+ * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release.
+ * 16-02-2012 page map extension by Al Viro
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+
+typedef __u16 __bitwise __fs16;
+typedef __u32 __bitwise __fs32;
+typedef __u64 __bitwise __fs64;
+
+#include <linux/qnx6_fs.h>
+
+#ifdef CONFIG_QNX6FS_DEBUG
+#define QNX6DEBUG(X) printk X
+#else
+#define QNX6DEBUG(X) (void) 0
+#endif
+
+struct qnx6_sb_info {
+ struct buffer_head *sb_buf; /* superblock buffer */
+ struct qnx6_super_block *sb; /* our superblock */
+ int s_blks_off; /* blkoffset fs-startpoint */
+ int s_ptrbits; /* indirect pointer bitfield */
+ unsigned long s_mount_opt; /* all mount options */
+ int s_bytesex; /* holds endianess info */
+ struct inode * inodes;
+ struct inode * longfile;
+};
+
+struct qnx6_inode_info {
+ __fs32 di_block_ptr[QNX6_NO_DIRECT_POINTERS];
+ __u8 di_filelevels;
+ __u32 i_dir_start_lookup;
+ struct inode vfs_inode;
+};
+
+extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino);
+extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd);
+
+#ifdef CONFIG_QNX6FS_DEBUG
+extern void qnx6_superblock_debug(struct qnx6_super_block *,
+ struct super_block *);
+#endif
+
+extern const struct inode_operations qnx6_dir_inode_operations;
+extern const struct file_operations qnx6_dir_operations;
+
+static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb)
+{
+ return sb->s_fs_info;
+}
+
+static inline struct qnx6_inode_info *QNX6_I(struct inode *inode)
+{
+ return container_of(inode, struct qnx6_inode_info, vfs_inode);
+}
+
+#define clear_opt(o, opt) (o &= ~(QNX6_MOUNT_##opt))
+#define set_opt(o, opt) (o |= (QNX6_MOUNT_##opt))
+#define test_opt(sb, opt) (QNX6_SB(sb)->s_mount_opt & \
+ QNX6_MOUNT_##opt)
+enum {
+ BYTESEX_LE,
+ BYTESEX_BE,
+};
+
+static inline __u64 fs64_to_cpu(struct qnx6_sb_info *sbi, __fs64 n)
+{
+ if (sbi->s_bytesex == BYTESEX_LE)
+ return le64_to_cpu((__force __le64)n);
+ else
+ return be64_to_cpu((__force __be64)n);
+}
+
+static inline __fs64 cpu_to_fs64(struct qnx6_sb_info *sbi, __u64 n)
+{
+ if (sbi->s_bytesex == BYTESEX_LE)
+ return (__force __fs64)cpu_to_le64(n);
+ else
+ return (__force __fs64)cpu_to_be64(n);
+}
+
+static inline __u32 fs32_to_cpu(struct qnx6_sb_info *sbi, __fs32 n)
+{
+ if (sbi->s_bytesex == BYTESEX_LE)
+ return le32_to_cpu((__force __le32)n);
+ else
+ return be32_to_cpu((__force __be32)n);
+}
+
+static inline __fs32 cpu_to_fs32(struct qnx6_sb_info *sbi, __u32 n)
+{
+ if (sbi->s_bytesex == BYTESEX_LE)
+ return (__force __fs32)cpu_to_le32(n);
+ else
+ return (__force __fs32)cpu_to_be32(n);
+}
+
+static inline __u16 fs16_to_cpu(struct qnx6_sb_info *sbi, __fs16 n)
+{
+ if (sbi->s_bytesex == BYTESEX_LE)
+ return le16_to_cpu((__force __le16)n);
+ else
+ return be16_to_cpu((__force __be16)n);
+}
+
+static inline __fs16 cpu_to_fs16(struct qnx6_sb_info *sbi, __u16 n)
+{
+ if (sbi->s_bytesex == BYTESEX_LE)
+ return (__force __fs16)cpu_to_le16(n);
+ else
+ return (__force __fs16)cpu_to_be16(n);
+}
+
+extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s,
+ int silent);
+
+static inline void qnx6_put_page(struct page *page)
+{
+ kunmap(page);
+ page_cache_release(page);
+}
+
+extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name,
+ struct page **res_page);