fs: initial qnx6fs addition

[cascardo/linux.git] / fs / qnx6 / qnx6.h

diff --git a/fs/qnx6/qnx6.h b/fs/qnx6/qnx6.h
new file mode 100644 (file)
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);