https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271704
Bug ID: 271704
Summary: O_PATH and acl_get_fd_np doesn't work on FreeBSD
13(.2) and causes vfs_zfsacl in Samba to fail
Product: Base System
Version: 13.2-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
The new O_PATH support in FreeBSD 13 doesn't seem to work with trying to read
ZFS ACLs via acl_get_fd_np().
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/acl.h>
#include <sys/stat.h>
int
main(int argc,
char *argv[]) {
int i, j, fd;
acl_t a;
char *path = ".";
int flags = O_PATH;
struct stat sb;
for (i = 1; i < argc && argv[i][0] == '-'; i++) {
for (j = 1; argv[i][j]; j++) {
switch (argv[i][j]) {
case 'n':
flags = 0;
break;
}
}
}
if (i < argc)
path = argv[i];
fd = open(path, O_RDONLY|flags);
if (fd < 0) {
fprintf(stderr, "%s: Error: %s: open: %s\n", argv[0], path,
strerror(errno));
exit(1);
}
if (fstat(fd, &sb) < 0) {
fprintf(stderr, "%s: Error: %s: fstat: %s\n", argv[0], path,
strerror(errno));
}
a = acl_get_fd_np(fd, ACL_TYPE_NFS4);
if (!a) {
fprintf(stderr, "%s: Error: %s: acl_get_fd_np: %s\n", argv[0], path,
strerror(errno));
}
return 0;
}
root@runur00:~Lpeter86 # ./t
./t: Error: .: acl_get_fd_np: Bad file descriptor
root@runur00:~Lpeter86 # ./t -n
root@runur00:~Lpeter86 # getfacl .
# file: .
# owner: Lpeter86
# group: Ladmins
owner@:rwxp--aARWcCos:-------:allow
group@:------a-R-c--s:-------:allow
everyone@:------a-R-c--s:-------:allow
This seems to cause atleast the Samba "zfsacl" module to fail.
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