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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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e56828f4df
Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250713143415.2857561-18-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef KUBLK_UTILS_H
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#define KUBLK_UTILS_H
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#define __maybe_unused __attribute__((unused))
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#ifndef min
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#define min(a, b) ((a) < (b) ? (a) : (b))
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#endif
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
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#ifndef offsetof
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#define offsetof(TYPE, MEMBER) ((size_t)&((TYPE *)0)->MEMBER)
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#endif
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#ifndef container_of
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#define container_of(ptr, type, member) ({ \
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unsigned long __mptr = (unsigned long)(ptr); \
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((type *)(__mptr - offsetof(type, member))); })
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#endif
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#define round_up(val, rnd) \
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(((val) + ((rnd) - 1)) & ~((rnd) - 1))
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static inline unsigned int ilog2(unsigned int x)
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{
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if (x == 0)
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return 0;
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return (sizeof(x) * 8 - 1) - __builtin_clz(x);
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}
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#define UBLK_DBG_DEV (1U << 0)
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#define UBLK_DBG_THREAD (1U << 1)
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#define UBLK_DBG_IO_CMD (1U << 2)
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#define UBLK_DBG_IO (1U << 3)
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#define UBLK_DBG_CTRL_CMD (1U << 4)
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#define UBLK_LOG (1U << 5)
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extern unsigned int ublk_dbg_mask;
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static inline void ublk_err(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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}
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static inline void ublk_log(const char *fmt, ...)
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{
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if (ublk_dbg_mask & UBLK_LOG) {
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stdout, fmt, ap);
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}
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}
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static inline void ublk_dbg(int level, const char *fmt, ...)
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{
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if (level & ublk_dbg_mask) {
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stdout, fmt, ap);
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}
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}
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#endif
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