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Add basic credential support and splat tests.

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The previous credential implementation simply provided the needed types and
a couple of dummy functions needed.  This update correctly ties the basic
Solaris credential API in to one of two Linux kernel APIs.

Prior to 2.6.29 the linux kernel embeded all credentials in the task
structure.  For these kernels, we pass around the entire task struct as if
it were the credential, then we use the helper functions to extract the
credential related bits.

As of 2.6.29 a new credential type was added which we can and do fairly
cleanly layer on top of.  Once again the helper functions nicely hide
the implementation details from all callers.

Three tests were added to the splat test framework to verify basic
correctness.  They should be extended as needed when need credential
functions are added.
This commit is contained in:
Brian Behlendorf
2009-07-27 17:18:59 -07:00
parent 3d0cb2d31d
commit ec7d53e99a
13 changed files with 839 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/sys/cred.h
+20 -56
View File
@@ -9,69 +9,33 @@ extern "C" {
#include <sys/types.h>
#include <sys/vfs.h>
/* XXX - Portions commented out because we really just want to have the type
* defined and the contents aren't nearly so important at the moment. */
typedef struct cred {
uint_t cr_ref; /* reference count */
uid_t cr_uid; /* effective user id */
gid_t cr_gid; /* effective group id */
uid_t cr_ruid; /* real user id */
gid_t cr_rgid; /* real group id */
uid_t cr_suid; /* "saved" user id (from exec) */
gid_t cr_sgid; /* "saved" group id (from exec) */
uint_t cr_ngroups; /* number of groups returned by */
/* crgroups() */
#if 0
cred_priv_t cr_priv; /* privileges */
projid_t cr_projid; /* project */
struct zone *cr_zone; /* pointer to per-zone structure */
struct ts_label_s *cr_label; /* pointer to the effective label */
credsid_t *cr_ksid; /* pointer to SIDs */
#endif
gid_t cr_groups[1]; /* cr_groups size not fixed */
/* audit info is defined dynamically */
/* and valid only when audit enabled */
/* auditinfo_addr_t cr_auinfo; audit info */
} cred_t;
#ifdef HAVE_CRED_STRUCT
#define kcred NULL
#define CRED() NULL
typedef struct cred cred_t;
static __inline__ uid_t
crgetuid(cred_t *cr)
{
return 0;
}
#define kcred ((cred_t *)(init_task.cred))
#define CRED() ((cred_t *)current_cred())
static __inline__ gid_t
crgetgid(cred_t *cr)
{
return 0;
}
#else
static __inline__ int
crgetngroups(cred_t *cr)
{
return 0;
}
typedef struct task_struct cred_t;
static __inline__ gid_t *
crgetgroups(cred_t *cr)
{
return NULL;
}
#define kcred ((cred_t *)&init_task)
#define CRED() ((cred_t *)current)
static __inline__ int
groupmember(gid_t gid, const cred_t *cr)
{
/* Primary group check */
if ((cr) && (gid == cr->cr_gid))
return 1;
/* Supplemental group check (unsupported) */
return 0;
}
#endif /* HAVE_CRED_STRUCT */
extern void crhold(cred_t *cr);
extern void crfree(cred_t *cr);
extern uid_t crgetuid(const cred_t *cr);
extern uid_t crgetruid(const cred_t *cr);
extern uid_t crgetsuid(const cred_t *cr);
extern gid_t crgetgid(const cred_t *cr);
extern gid_t crgetrgid(const cred_t *cr);
extern gid_t crgetsgid(const cred_t *cr);
extern int crgetngroups(const cred_t *cr);
extern gid_t * crgetgroups(const cred_t *cr);
extern int groupmember(gid_t gid, const cred_t *cr);
#ifdef __cplusplus
}
include/sys/debug.h
+1
View File
@@ -53,6 +53,7 @@ extern unsigned long spl_debug_subsys;
#define S_GENERIC 0x00002000
#define S_PROC 0x00004000
#define S_MODULE 0x00008000
#define S_CRED 0x00010000
#define D_TRACE 0x00000001
#define D_INFO 0x00000002