1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef _UAPI_LINUX_OPENAT2_H 3*4882a593Smuzhiyun #define _UAPI_LINUX_OPENAT2_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/types.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* 8*4882a593Smuzhiyun * Arguments for how openat2(2) should open the target path. If only @flags and 9*4882a593Smuzhiyun * @mode are non-zero, then openat2(2) operates very similarly to openat(2). 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun * However, unlike openat(2), unknown or invalid bits in @flags result in 12*4882a593Smuzhiyun * -EINVAL rather than being silently ignored. @mode must be zero unless one of 13*4882a593Smuzhiyun * {O_CREAT, O_TMPFILE} are set. 14*4882a593Smuzhiyun * 15*4882a593Smuzhiyun * @flags: O_* flags. 16*4882a593Smuzhiyun * @mode: O_CREAT/O_TMPFILE file mode. 17*4882a593Smuzhiyun * @resolve: RESOLVE_* flags. 18*4882a593Smuzhiyun */ 19*4882a593Smuzhiyun struct open_how { 20*4882a593Smuzhiyun __u64 flags; 21*4882a593Smuzhiyun __u64 mode; 22*4882a593Smuzhiyun __u64 resolve; 23*4882a593Smuzhiyun }; 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun /* how->resolve flags for openat2(2). */ 26*4882a593Smuzhiyun #define RESOLVE_NO_XDEV 0x01 /* Block mount-point crossings 27*4882a593Smuzhiyun (includes bind-mounts). */ 28*4882a593Smuzhiyun #define RESOLVE_NO_MAGICLINKS 0x02 /* Block traversal through procfs-style 29*4882a593Smuzhiyun "magic-links". */ 30*4882a593Smuzhiyun #define RESOLVE_NO_SYMLINKS 0x04 /* Block traversal through all symlinks 31*4882a593Smuzhiyun (implies OEXT_NO_MAGICLINKS) */ 32*4882a593Smuzhiyun #define RESOLVE_BENEATH 0x08 /* Block "lexical" trickery like 33*4882a593Smuzhiyun "..", symlinks, and absolute 34*4882a593Smuzhiyun paths which escape the dirfd. */ 35*4882a593Smuzhiyun #define RESOLVE_IN_ROOT 0x10 /* Make all jumps to "/" and ".." 36*4882a593Smuzhiyun be scoped inside the dirfd 37*4882a593Smuzhiyun (similar to chroot(2)). */ 38*4882a593Smuzhiyun #define RESOLVE_CACHED 0x20 /* Only complete if resolution can be 39*4882a593Smuzhiyun completed through cached lookup. May 40*4882a593Smuzhiyun return -EAGAIN if that's not 41*4882a593Smuzhiyun possible. */ 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun #endif /* _UAPI_LINUX_OPENAT2_H */ 44