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make crfree into a function rather than a macro to avoid bloat because of

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the mutex aquire/release

reorder struct ucred
This commit is contained in:
Alfred Perlstein 2000-11-30 19:09:48 +00:00
parent 6d984dfa6a
commit 5c3f70d7c0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=69401
2 changed files with 16 additions and 7 deletions
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14
sys/kern/kern_prot.c
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@ -1137,6 +1137,20 @@ crget()
return (cr);
}
/*
* Claim another referernce to a ucred structure
*/
void
crhold(cr)
struct ucred *cr;
{
mtx_enter(&cr->cr_mtx, MTX_DEF);
cr->cr_ref++;
mtx_exit(&(cr)->cr_mtx, MTX_DEF);
}
/*
* Free a cred structure.
* Throws away space when ref count gets to 0.

9
sys/sys/ucred.h
View File

@ -46,24 +46,18 @@
* Only the suser()/suser_xxx() function should be used for this.
*/
struct ucred {
struct mtx cr_mtx; /* protect refcount */
u_int cr_ref; /* reference count */
uid_t cr_uid; /* effective user id */
short cr_ngroups; /* number of groups */
gid_t cr_groups[NGROUPS]; /* groups */
struct uidinfo *cr_uidinfo; /* per uid resource consumption */
struct mtx cr_mtx; /* protect refcount */
};
#define cr_gid cr_groups[0]
#define NOCRED ((struct ucred *)0) /* no credential available */
#define FSCRED ((struct ucred *)-1) /* filesystem credential */
#ifdef _KERNEL
#define crhold(cr) \
do { \
mtx_enter(&(cr)->cr_mtx, MTX_DEF); \
(cr)->cr_ref++; \
mtx_exit(&(cr)->cr_mtx, MTX_DEF); \
} while (0)
struct proc;
@ -73,6 +67,7 @@ struct ucred *crcopy __P((struct ucred *cr));
struct ucred *crdup __P((struct ucred *cr));
void crfree __P((struct ucred *cr));
struct ucred *crget __P((void));
void crhold __P((struct ucred *cr));
int groupmember __P((gid_t gid, struct ucred *cred));
#endif /* _KERNEL */