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linux(4): Add AT_NO_AUTOMOUNT to statx.

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Specific to Linux AT_NO_AUTOMOUNT flag tells the kernel to not automount the
terminal component of pathname if it is a directory that is an automount point.
As it is the default for FreeBSD silencly ignore this flag.

glibc-2.34 uses this flag in the stat64 system calls which is used by i386.

Reviewed by:		trasz
Differential revision:  https://reviews.freebsd.org/D31524
MFC after:		2 weeks
This commit is contained in:
Dmitry Chagin 2022-03-25 17:54:23 +03:00
parent aae8ae5ea5
commit ff39d74aa9
2 changed files with 9 additions and 1 deletions
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7
sys/compat/linux/linux_file.h
View file

@ -36,6 +36,13 @@
#define LINUX_AT_EACCESS 0x200
#define LINUX_AT_REMOVEDIR 0x200
#define LINUX_AT_SYMLINK_FOLLOW 0x400
#define LINUX_AT_NO_AUTOMOUNT 0x800
/*
* Specific to Linux AT_NO_AUTOMOUNT flag tells the kernel to
* not automount the terminal component of pathname if it is a
* directory that is an automount point. As FreeBSD does not
* have such facility (automount), we can simply ignore this flag.
*/
#define LINUX_AT_EMPTY_PATH 0x1000
/*

3
sys/compat/linux/linux_stats.c
View file

@ -774,7 +774,8 @@ linux_statx(struct thread *td, struct linux_statx_args *args)
int error, dirfd, flags, unsupported;
struct stat buf;
unsupported = args->flags & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH);
unsupported = args->flags & ~(LINUX_AT_SYMLINK_NOFOLLOW |
LINUX_AT_EMPTY_PATH | LINUX_AT_NO_AUTOMOUNT);
if (unsupported != 0) {
linux_msg(td, "statx unsupported flags 0x%x", unsupported);
return (EINVAL);