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
23typedef __u16 __bitwise __fs16;
24typedef __u32 __bitwise __fs32;
25typedef __u64 __bitwise __fs64;
26
27#include <linux/qnx6_fs.h>
28
29struct 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
40struct 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
47extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino);
48extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
49					unsigned int flags);
50
51#ifdef CONFIG_QNX6FS_DEBUG
52extern void qnx6_superblock_debug(struct qnx6_super_block *,
53						struct super_block *);
54#endif
55
56extern const struct inode_operations qnx6_dir_inode_operations;
57extern const struct file_operations qnx6_dir_operations;
58
59static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb)
60{
61	return sb->s_fs_info;
62}
63
64static 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)
73enum {
74	BYTESEX_LE,
75	BYTESEX_BE,
76};
77
78static 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
86static 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
94static 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
102static 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
110static 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
118static 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
126extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s,
127						    int silent);
128
129static inline void qnx6_put_page(struct page *page)
130{
131	kunmap(page);
132	put_page(page);
133}
134
135extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name,
136				struct page **res_page);
137