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support the linux /proc/fs/mumel/afs_ioctl afs "syscall" interface

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@13974 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2004-06-22 12:34:23 +00:00
parent 793d048a56
commit 87d06b184a
1 changed files with 65 additions and 4 deletions
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69
lib/kafs/afssys.c
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@@ -35,6 +35,16 @@
RCSID("$Id$");
struct procdata {
unsigned long param4;
unsigned long param3;
unsigned long param2;
unsigned long param1;
unsigned long syscall;
};
#define VIOC_SYSCALL _IOW('C', 1, void *)
int _kafs_debug; /* this should be done in a better way */
#define NO_ENTRY_POINT 0
@@ -42,10 +52,12 @@ int _kafs_debug; /* this should be done in a better way */
#define MULTIPLE_ENTRY_POINT 2
#define SINGLE_ENTRY_POINT2 3
#define SINGLE_ENTRY_POINT3 4
#define AIX_ENTRY_POINTS 5
#define UNKNOWN_ENTRY_POINT 6
#define LINUX_PROC_POINT 5
#define AIX_ENTRY_POINTS 6
#define UNKNOWN_ENTRY_POINT 7
static int afs_entry_point = UNKNOWN_ENTRY_POINT;
static int afs_syscalls[2];
static char *afs_procpath;
/* Magic to get AIX syscalls to work */
#ifdef _AIX
@@ -132,6 +144,37 @@ map_syscall_name_to_number (const char *str, int *res)
return -1;
}
static int
try_proc(const char *path)
{
int fd;
fd = open(path, O_RDWR);
if (fd < 0)
return 1;
close(fd);
afs_procpath = strdup(path);
if (afs_procpath == NULL)
return 1;
afs_entry_point = LINUX_PROC_POINT;
return 0;
}
static int
do_proc(struct procdata *data)
{
int fd, ret, saved_errno;
fd = open(afs_procpath, O_RDWR);
if (fd < 0) {
errno = EINVAL;
return -1;
}
ret = ioctl(fd, VIOC_SYSCALL, data);
saved_errno = errno;
close(fd);
errno = saved_errno;
return ret;
}
int
k_pioctl(char *a_path,
int o_opcode,
@@ -152,12 +195,19 @@ k_pioctl(char *a_path,
return syscall(afs_syscalls[0],
a_path, o_opcode, a_paramsP, a_followSymlinks);
#endif
case LINUX_PROC_POINT: {
struct procdata data = { 0, 0, 0, 0, AFSCALL_PIOCTL };
data.param1 = (unsigned long)a_path;
data.param2 = (unsigned long)o_opcode;
data.param3 = (unsigned long)a_paramsP;
data.param4 = (unsigned long)a_followSymlinks;
return do_proc(&data);
}
#ifdef _AIX
case AIX_ENTRY_POINTS:
return Pioctl(a_path, o_opcode, a_paramsP, a_followSymlinks);
#endif
}
}
errno = ENOSYS;
#ifdef SIGSYS
kill(getpid(), SIGSYS); /* You lose! */
@@ -200,6 +250,10 @@ k_setpag(void)
case MULTIPLE_ENTRY_POINT:
return syscall(afs_syscalls[1]);
#endif
case LINUX_PROC_POINT: {
struct procdata data = { 0, 0, 0, 0, AFSCALL_SETPAG };
return do_proc(&data);
}
#ifdef _AIX
case AIX_ENTRY_POINTS:
return Setpag();
@@ -388,6 +442,13 @@ k_hasafs(void)
goto done;
#endif
if (try_proc("/proc/fs/openafs/afs_ioctl") == 0)
goto done;
if (try_proc("/proc/fs/arla/afs_ioctl") == 0)
goto done;
if (env && try_proc(env) == 0)
goto done;
done:
#ifdef SIGSYS
signal(SIGSYS, saved_func);