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LinuxKPI: Add ida_alloc_min()

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ida_alloc_min() allocates an unused ID. between min and INT_MAX.

While here allow end parameter of ida_simple_get() be larger than
INT_MAX. Linux caps the value to INT_MAX.

Sponsored by:	Serenity Cyber Security, LLC
Reviewers:	manu, bz
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D42806

(cherry picked from commit c7312643b7e5f01adc2a3094c5139f5dcab5f0a4)
This commit is contained in:
Vladimir Kondratyev 2023-12-24 11:19:59 +03:00
parent 67cc189db4
commit fcfc3fe00d
2 changed files with 9 additions and 3 deletions
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7
sys/compat/linuxkpi/common/include/linux/idr.h
View file

@ -31,6 +31,7 @@
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/limits.h>
#include <sys/mutex.h>
#include <linux/types.h>
@ -131,6 +132,12 @@ ida_get_new(struct ida *ida, int *p_id)
return (ida_get_new_above(ida, 0, p_id));
}
static inline int
ida_alloc_min(struct ida *ida, unsigned int min, gfp_t gfp)
{
return (ida_simple_get(ida, min, UINT_MAX, gfp));
}
static inline int
ida_alloc_max(struct ida *ida, unsigned int max, gfp_t gfp)
{

5
sys/compat/linuxkpi/common/src/linux_idr.c
View file

@ -755,10 +755,9 @@ ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
unsigned int max;
MPASS((int)start >= 0);
MPASS((int)end >= 0);
if (end == 0)
max = 0x80000000;
if ((int)end <= 0)
max = INT_MAX;
else {
MPASS(end > start);
max = end - 1;