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| author | Christian Brauner <brauner@kernel.org> | 2024-06-27 16:11:42 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-06-28 10:37:29 +0200 |
| commit | 5b08bd408534bfb3a7cf5778da5b27d4e4fffe12 (patch) | |
| tree | 3c53309a97af179f2c6371f0b63a48cb36f10aea /include/uapi/linux/pidfd.h | |
| parent | 460695a294e63de4e4f30ad1679ffddeec932bb8 (diff) | |
| download | linux-stable-5b08bd408534bfb3a7cf5778da5b27d4e4fffe12.tar.gz linux-stable-5b08bd408534bfb3a7cf5778da5b27d4e4fffe12.tar.bz2 linux-stable-5b08bd408534bfb3a7cf5778da5b27d4e4fffe12.zip | |
pidfs: allow retrieval of namespace file descriptors
For users that hold a reference to a pidfd procfs might not even be
available nor is it desirable to parse through procfs just for the sake
of getting namespace file descriptors for a process.
Make it possible to directly retrieve namespace file descriptors from a
pidfd. Pidfds already can be used with setns() to change a set of
namespaces atomically.
Link: https://lore.kernel.org/r/20240627-work-pidfs-v1-4-7e9ab6cc3bb1@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'include/uapi/linux/pidfd.h')
| -rw-r--r-- | include/uapi/linux/pidfd.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/uapi/linux/pidfd.h b/include/uapi/linux/pidfd.h index 72ec000a97cd..565fc0629fff 100644 --- a/include/uapi/linux/pidfd.h +++ b/include/uapi/linux/pidfd.h @@ -5,6 +5,7 @@ #include <linux/types.h> #include <linux/fcntl.h> +#include <linux/ioctl.h> /* Flags for pidfd_open(). */ #define PIDFD_NONBLOCK O_NONBLOCK @@ -15,4 +16,17 @@ #define PIDFD_SIGNAL_THREAD_GROUP (1UL << 1) #define PIDFD_SIGNAL_PROCESS_GROUP (1UL << 2) +#define PIDFS_IOCTL_MAGIC 0xFF + +#define PIDFD_GET_CGROUP_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 1) +#define PIDFD_GET_IPC_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 2) +#define PIDFD_GET_MNT_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 3) +#define PIDFD_GET_NET_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 4) +#define PIDFD_GET_PID_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 5) +#define PIDFD_GET_PID_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 6) +#define PIDFD_GET_TIME_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 7) +#define PIDFD_GET_TIME_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 8) +#define PIDFD_GET_USER_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 9) +#define PIDFD_GET_UTS_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 10) + #endif /* _UAPI_LINUX_PIDFD_H */ |