diff options
Diffstat (limited to 'include/linux/ioprio.h')
| -rw-r--r-- | include/linux/ioprio.h | 44 |
1 files changed, 10 insertions, 34 deletions
diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h index e9bfe6972aed..3f53bc27a19b 100644 --- a/include/linux/ioprio.h +++ b/include/linux/ioprio.h @@ -6,46 +6,22 @@ #include <linux/sched/rt.h> #include <linux/iocontext.h> -/* - * Gives us 8 prio classes with 13-bits of data for each class - */ -#define IOPRIO_CLASS_SHIFT (13) -#define IOPRIO_PRIO_MASK ((1UL << IOPRIO_CLASS_SHIFT) - 1) - -#define IOPRIO_PRIO_CLASS(mask) ((mask) >> IOPRIO_CLASS_SHIFT) -#define IOPRIO_PRIO_DATA(mask) ((mask) & IOPRIO_PRIO_MASK) -#define IOPRIO_PRIO_VALUE(class, data) (((class) << IOPRIO_CLASS_SHIFT) | data) - -#define ioprio_valid(mask) (IOPRIO_PRIO_CLASS((mask)) != IOPRIO_CLASS_NONE) +#include <uapi/linux/ioprio.h> /* - * These are the io priority groups as implemented by CFQ. RT is the realtime - * class, it always gets premium service. BE is the best-effort scheduling - * class, the default for any process. IDLE is the idle scheduling class, it - * is only served when no one else is using the disk. + * Default IO priority. */ -enum { - IOPRIO_CLASS_NONE, - IOPRIO_CLASS_RT, - IOPRIO_CLASS_BE, - IOPRIO_CLASS_IDLE, -}; +#define IOPRIO_DEFAULT IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_BE_NORM) /* - * 8 best effort priority levels are supported + * Check that a priority value has a valid class. */ -#define IOPRIO_BE_NR (8) - -enum { - IOPRIO_WHO_PROCESS = 1, - IOPRIO_WHO_PGRP, - IOPRIO_WHO_USER, -}; +static inline bool ioprio_valid(unsigned short ioprio) +{ + unsigned short class = IOPRIO_PRIO_CLASS(ioprio); -/* - * Fallback BE priority - */ -#define IOPRIO_NORM (4) + return class > IOPRIO_CLASS_NONE && class <= IOPRIO_CLASS_IDLE; +} /* * if process has set io priority explicitly, use that. if not, convert @@ -80,7 +56,7 @@ static inline int get_current_ioprio(void) if (ioc) return ioc->ioprio; - return IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0); + return IOPRIO_DEFAULT; } /* |