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
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