1 /* 2 * QNX6 file system, Linux implementation. 3 * 4 * Version : 1.0.0 5 * 6 * History : 7 * 8 * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. 9 * 16-02-2012 page map extension by Al Viro 10 * 11 */ 12 13 #ifdef pr_fmt 14 #undef pr_fmt 15 #endif 16 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19 #include <linux/fs.h> 20 #include <linux/pagemap.h> 21 22 typedef __u16 __bitwise __fs16; 23 typedef __u32 __bitwise __fs32; 24 typedef __u64 __bitwise __fs64; 25 26 #include <linux/qnx6_fs.h> 27 28 struct qnx6_sb_info { 29 struct buffer_head *sb_buf; /* superblock buffer */ 30 struct qnx6_super_block *sb; /* our superblock */ 31 int s_blks_off; /* blkoffset fs-startpoint */ 32 int s_ptrbits; /* indirect pointer bitfield */ 33 unsigned long s_mount_opt; /* all mount options */ 34 int s_bytesex; /* holds endianess info */ 35 struct inode * inodes; 36 struct inode * longfile; 37 }; 38 39 struct qnx6_inode_info { 40 __fs32 di_block_ptr[QNX6_NO_DIRECT_POINTERS]; 41 __u8 di_filelevels; 42 __u32 i_dir_start_lookup; 43 struct inode vfs_inode; 44 }; 45 46 extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino); 47 extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry, 48 unsigned int flags); 49 50 #ifdef CONFIG_QNX6FS_DEBUG 51 extern void qnx6_superblock_debug(struct qnx6_super_block *, 52 struct super_block *); 53 #endif 54 55 extern const struct inode_operations qnx6_dir_inode_operations; 56 extern const struct file_operations qnx6_dir_operations; 57 58 static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb) 59 { 60 return sb->s_fs_info; 61 } 62 63 static inline struct qnx6_inode_info *QNX6_I(struct inode *inode) 64 { 65 return container_of(inode, struct qnx6_inode_info, vfs_inode); 66 } 67 68 #define clear_opt(o, opt) (o &= ~(QNX6_MOUNT_##opt)) 69 #define set_opt(o, opt) (o |= (QNX6_MOUNT_##opt)) 70 #define test_opt(sb, opt) (QNX6_SB(sb)->s_mount_opt & \ 71 QNX6_MOUNT_##opt) 72 enum { 73 BYTESEX_LE, 74 BYTESEX_BE, 75 }; 76 77 static inline __u64 fs64_to_cpu(struct qnx6_sb_info *sbi, __fs64 n) 78 { 79 if (sbi->s_bytesex == BYTESEX_LE) 80 return le64_to_cpu((__force __le64)n); 81 else 82 return be64_to_cpu((__force __be64)n); 83 } 84 85 static inline __fs64 cpu_to_fs64(struct qnx6_sb_info *sbi, __u64 n) 86 { 87 if (sbi->s_bytesex == BYTESEX_LE) 88 return (__force __fs64)cpu_to_le64(n); 89 else 90 return (__force __fs64)cpu_to_be64(n); 91 } 92 93 static inline __u32 fs32_to_cpu(struct qnx6_sb_info *sbi, __fs32 n) 94 { 95 if (sbi->s_bytesex == BYTESEX_LE) 96 return le32_to_cpu((__force __le32)n); 97 else 98 return be32_to_cpu((__force __be32)n); 99 } 100 101 static inline __fs32 cpu_to_fs32(struct qnx6_sb_info *sbi, __u32 n) 102 { 103 if (sbi->s_bytesex == BYTESEX_LE) 104 return (__force __fs32)cpu_to_le32(n); 105 else 106 return (__force __fs32)cpu_to_be32(n); 107 } 108 109 static inline __u16 fs16_to_cpu(struct qnx6_sb_info *sbi, __fs16 n) 110 { 111 if (sbi->s_bytesex == BYTESEX_LE) 112 return le16_to_cpu((__force __le16)n); 113 else 114 return be16_to_cpu((__force __be16)n); 115 } 116 117 static inline __fs16 cpu_to_fs16(struct qnx6_sb_info *sbi, __u16 n) 118 { 119 if (sbi->s_bytesex == BYTESEX_LE) 120 return (__force __fs16)cpu_to_le16(n); 121 else 122 return (__force __fs16)cpu_to_be16(n); 123 } 124 125 extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, 126 int silent); 127 128 static inline void qnx6_put_page(struct page *page) 129 { 130 kunmap(page); 131 page_cache_release(page); 132 } 133 134 extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name, 135 struct page **res_page); 136