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 | |