| From: |
| James Bottomley <James.Bottomley-AT-HansenPartnership.com> |
| To: |
| linux-fsdevel-AT-vger.kernel.org |
| Subject: |
| [PATCH v2 0/6] introduce configfd as generalisation of fsconfig |
| Date: |
| Sat, 4 Jan 2020 12:14:26 -0800 |
| Message-ID: |
| <20200104201432.27320-1-James.Bottomley@HansenPartnership.com> |
| Cc: |
| David Howells <dhowells-AT-redhat.com>, Christian Brauner <christian-AT-brauner.io>, Al Viro <viro-AT-ZenIV.linux.org.uk>, Miklos Szeredi <miklos-AT-szeredi.hu> |
| Archive-link: |
| Article |
fsconfig is a very powerful configuration mechanism except that it
only works for filesystems with superblocks. This patch series
generalises the useful concept of a multiple step configurational
mechanism carried by a file descriptor. The object of this patch
series is to get bind mounts to be configurable in the same way that
superblock based ones are, but it should have utility beyond the
filesytem realm. Patch 4 also reimplements fsconfig in terms of
configfd, but that's not a strictly necessary patch, it is merely a
useful demonstration that configfd is a superset of the properties of
fsconfig.
v1 of this patch series was originally sent as an rfc in reply to a
thread about feature bugs with the new mount API:
https://lore.kernel.org/linux-fsdevel/1574295100.17153.25...
James
---
James Bottomley (6):
logger: add a limited buffer logging facility
configfd: add generic file descriptor based configuration parser
configfd: syscall: wire up configfd syscalls
fs: implement fsconfig via configfd
fs: expose internal interfaces open_detached_copy and
do_reconfigure_mount
fs: bind: add configfs type for bind mounts
arch/alpha/kernel/syscalls/syscall.tbl | 2 +
arch/arm/tools/syscall.tbl | 2 +
arch/arm64/include/asm/unistd.h | 2 +-
arch/arm64/include/asm/unistd32.h | 4 +
arch/ia64/kernel/syscalls/syscall.tbl | 2 +
arch/m68k/kernel/syscalls/syscall.tbl | 2 +
arch/microblaze/kernel/syscalls/syscall.tbl | 2 +
arch/mips/kernel/syscalls/syscall_n32.tbl | 2 +
arch/mips/kernel/syscalls/syscall_n64.tbl | 2 +
arch/mips/kernel/syscalls/syscall_o32.tbl | 2 +
arch/parisc/kernel/syscalls/syscall.tbl | 2 +
arch/powerpc/kernel/syscalls/syscall.tbl | 2 +
arch/s390/kernel/syscalls/syscall.tbl | 2 +
arch/sh/kernel/syscalls/syscall.tbl | 2 +
arch/sparc/kernel/syscalls/syscall.tbl | 2 +
arch/x86/entry/syscalls/syscall_32.tbl | 2 +
arch/x86/entry/syscalls/syscall_64.tbl | 2 +
arch/xtensa/kernel/syscalls/syscall.tbl | 2 +
fs/Makefile | 3 +-
fs/bind.c | 232 ++++++++++++
fs/configfd.c | 450 +++++++++++++++++++++++
fs/filesystems.c | 8 +-
fs/fs_context.c | 124 +------
fs/fsopen.c | 535 ++++++++++++++--------------
fs/internal.h | 7 +
fs/namespace.c | 115 +++---
include/linux/configfd.h | 61 ++++
include/linux/fs.h | 2 +
include/linux/fs_context.h | 29 +-
include/linux/fs_parser.h | 2 +
include/linux/logger.h | 34 ++
include/linux/syscalls.h | 5 +
include/uapi/asm-generic/unistd.h | 7 +-
include/uapi/linux/configfd.h | 20 ++
lib/Makefile | 3 +-
lib/logger.c | 211 +++++++++++
36 files changed, 1413 insertions(+), 473 deletions(-)
create mode 100644 fs/bind.c
create mode 100644 fs/configfd.c
create mode 100644 include/linux/configfd.h
create mode 100644 include/linux/logger.h
create mode 100644 include/uapi/linux/configfd.h
create mode 100644 lib/logger.c
--
2.16.4
