tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef KUBLK_UTILS_H
3#define KUBLK_UTILS_H
4
5#ifndef min
6#define min(a, b) ((a) < (b) ? (a) : (b))
7#endif
8
9#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
10
11#ifndef offsetof
12#define offsetof(TYPE, MEMBER) ((size_t)&((TYPE *)0)->MEMBER)
13#endif
14
15#ifndef container_of
16#define container_of(ptr, type, member) ({ \
17 unsigned long __mptr = (unsigned long)(ptr); \
18 ((type *)(__mptr - offsetof(type, member))); })
19#endif
20
21#define round_up(val, rnd) \
22 (((val) + ((rnd) - 1)) & ~((rnd) - 1))
23
24static inline unsigned int ilog2(unsigned int x)
25{
26 if (x == 0)
27 return 0;
28 return (sizeof(x) * 8 - 1) - __builtin_clz(x);
29}
30
31#define UBLK_DBG_DEV (1U << 0)
32#define UBLK_DBG_THREAD (1U << 1)
33#define UBLK_DBG_IO_CMD (1U << 2)
34#define UBLK_DBG_IO (1U << 3)
35#define UBLK_DBG_CTRL_CMD (1U << 4)
36#define UBLK_LOG (1U << 5)
37
38extern unsigned int ublk_dbg_mask;
39
40static inline void ublk_err(const char *fmt, ...)
41{
42 va_list ap;
43
44 va_start(ap, fmt);
45 vfprintf(stderr, fmt, ap);
46}
47
48static inline void ublk_log(const char *fmt, ...)
49{
50 if (ublk_dbg_mask & UBLK_LOG) {
51 va_list ap;
52
53 va_start(ap, fmt);
54 vfprintf(stdout, fmt, ap);
55 }
56}
57
58static inline void ublk_dbg(int level, const char *fmt, ...)
59{
60 if (level & ublk_dbg_mask) {
61 va_list ap;
62
63 va_start(ap, fmt);
64 vfprintf(stdout, fmt, ap);
65 }
66}
67
68#endif