1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * QNX6 file system, Linux implementation. 4 * 5 * Version : 1.0.0 6 * 7 * History : 8 * 9 * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. 10 * 16-02-2012 page map extension by Al Viro 11 * 12 */ 13 14 #ifdef pr_fmt 15 #undef pr_fmt 16 #endif 17 18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 19 20 #include <linux/fs.h> 21 #include <linux/pagemap.h> 22 23 typedef __u16 __bitwise __fs16; 24 typedef __u32 __bitwise __fs32; 25 typedef __u64 __bitwise __fs64; 26 27 #include <linux/qnx6_fs.h> 28 29 struct qnx6_sb_info { 30 struct buffer_head *sb_buf; /* superblock buffer */ 31 struct qnx6_super_block *sb; /* our superblock */ 32 int s_blks_off; /* blkoffset fs-startpoint */ 33 int s_ptrbits; /* indirect pointer bitfield */ 34 unsigned long s_mount_opt; /* all mount options */ 35 int s_bytesex; /* holds endianess info */ 36 struct inode * inodes; 37 struct inode * longfile; 38 }; 39 40 struct qnx6_inode_info { 41 __fs32 di_block_ptr[QNX6_NO_DIRECT_POINTERS]; 42 __u8 di_filelevels; 43 __u32 i_dir_start_lookup; 44 struct inode vfs_inode; 45 }; 46 47 extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino); 48 extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry, 49 unsigned int flags); 50 51 #ifdef CONFIG_QNX6FS_DEBUG 52 extern void qnx6_superblock_debug(struct qnx6_super_block *, 53 struct super_block *); 54 #endif 55 56 extern const struct inode_operations qnx6_dir_inode_operations; 57 extern const struct file_operations qnx6_dir_operations; 58 59 static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb) 60 { 61 return sb->s_fs_info; 62 } 63 64 static inline struct qnx6_inode_info *QNX6_I(struct inode *inode) 65 { 66 return container_of(inode, struct qnx6_inode_info, vfs_inode); 67 } 68 69 #define clear_opt(o, opt) (o &= ~(QNX6_MOUNT_##opt)) 70 #define set_opt(o, opt) (o |= (QNX6_MOUNT_##opt)) 71 #define test_opt(sb, opt) (QNX6_SB(sb)->s_mount_opt & \ 72 QNX6_MOUNT_##opt) 73 enum { 74 BYTESEX_LE, 75 BYTESEX_BE, 76 }; 77 78 static inline __u64 fs64_to_cpu(struct qnx6_sb_info *sbi, __fs64 n) 79 { 80 if (sbi->s_bytesex == BYTESEX_LE) 81 return le64_to_cpu((__force __le64)n); 82 else 83 return be64_to_cpu((__force __be64)n); 84 } 85 86 static inline __fs64 cpu_to_fs64(struct qnx6_sb_info *sbi, __u64 n) 87 { 88 if (sbi->s_bytesex == BYTESEX_LE) 89 return (__force __fs64)cpu_to_le64(n); 90 else 91 return (__force __fs64)cpu_to_be64(n); 92 } 93 94 static inline __u32 fs32_to_cpu(struct qnx6_sb_info *sbi, __fs32 n) 95 { 96 if (sbi->s_bytesex == BYTESEX_LE) 97 return le32_to_cpu((__force __le32)n); 98 else 99 return be32_to_cpu((__force __be32)n); 100 } 101 102 static inline __fs32 cpu_to_fs32(struct qnx6_sb_info *sbi, __u32 n) 103 { 104 if (sbi->s_bytesex == BYTESEX_LE) 105 return (__force __fs32)cpu_to_le32(n); 106 else 107 return (__force __fs32)cpu_to_be32(n); 108 } 109 110 static inline __u16 fs16_to_cpu(struct qnx6_sb_info *sbi, __fs16 n) 111 { 112 if (sbi->s_bytesex == BYTESEX_LE) 113 return le16_to_cpu((__force __le16)n); 114 else 115 return be16_to_cpu((__force __be16)n); 116 } 117 118 static inline __fs16 cpu_to_fs16(struct qnx6_sb_info *sbi, __u16 n) 119 { 120 if (sbi->s_bytesex == BYTESEX_LE) 121 return (__force __fs16)cpu_to_le16(n); 122 else 123 return (__force __fs16)cpu_to_be16(n); 124 } 125 126 extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, 127 int silent); 128 129 static inline void qnx6_put_page(struct page *page) 130 { 131 kunmap(page); 132 put_page(page); 133 } 134 135 extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name, 136 struct page **res_page); 137