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Message-ID: <20260529171103.12343-6-luis@igalia.com>
Date: Fri, 29 May 2026 18:11:02 +0100
From: Luis Henriques <luis@...lia.com>
To: musl@...ts.openwall.com
Cc: Luis Henriques <luis@...lia.com>
Subject: [RFC PATCH 5/6] add fsmount() linux syscall wrapper
The fsmount() syscall is part of the "new" mount API which was merged into
the linux kernel 5.2.
Signed-off-by: Luis Henriques <luis@...lia.com>
---
include/sys/mount.h | 15 +++++++++++++++
src/linux/mount.c | 5 +++++
2 files changed, 20 insertions(+)
diff --git a/include/sys/mount.h b/include/sys/mount.h
index 3a7dee0e04ad..06efcff4a66b 100644
--- a/include/sys/mount.h
+++ b/include/sys/mount.h
@@ -90,6 +90,20 @@ enum fsconfig_command {
FSCONFIG_CMD_CREATE_EXCL = 8,
};
+#define FSMOUNT_CLOEXEC 0x00000001
+
+#define MOUNT_ATTR_RDONLY 0x00000001
+#define MOUNT_ATTR_NOSUID 0x00000002
+#define MOUNT_ATTR_NODEV 0x00000004
+#define MOUNT_ATTR_NOEXEC 0x00000008
+#define MOUNT_ATTR__ATIME 0x00000070
+#define MOUNT_ATTR_RELATIME 0x00000000
+#define MOUNT_ATTR_NOATIME 0x00000010
+#define MOUNT_ATTR_STRICTATIME 0x00000020
+#define MOUNT_ATTR_NODIRATIME 0x00000080
+#define MOUNT_ATTR_IDMAP 0x00100000
+#define MOUNT_ATTR_NOSYMFOLLOW 0x00200000
+
int mount(const char *, const char *, const char *, unsigned long, const void *);
int umount(const char *);
int umount2(const char *, int);
@@ -98,6 +112,7 @@ int open_tree(int, const char *, unsigned int);
int move_mount(int, const char *, int, const char *, unsigned int);
int fsopen(const char *, unsigned int);
int fsconfig(int, unsigned int, const char *, const void *, int);
+int fsmount(int, unsigned int, unsigned int);
#ifdef __cplusplus
}
diff --git a/src/linux/mount.c b/src/linux/mount.c
index 5be2c8cb8c58..91ea4bb6be37 100644
--- a/src/linux/mount.c
+++ b/src/linux/mount.c
@@ -35,3 +35,8 @@ int fsconfig(int fd, unsigned int cmd, const char *key, const void * value, int
{
return syscall(SYS_fsconfig, fd, cmd, key, value, aux);
}
+
+int fsmount(int fsfd, unsigned int flags, unsigned int attr_flags)
+{
+ return syscall(SYS_fsmount, fsfd, flags, attr_flags);
+}
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