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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-03 11:30:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-03 11:30:20 -0700 |
| commit | d8836005236425cf3cfcc8967abd1d5c21f607f8 (patch) | |
| tree | 9b4a99dbe1dce5d2cb1435e2c64b063be8565f9a /include/linux/kernfs.h | |
| parent | f2c3bec3c90df7a68bc24924426ff59183e028a3 (diff) | |
| parent | 0c05b9bdbfe52ad9b391a28dd26f047715627e0c (diff) | |
Merge branch 'for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
- Christian extended clone3 so that processes can be spawned into
cgroups directly.
This is not only neat in terms of semantics but also avoids grabbing
the global cgroup_threadgroup_rwsem for migration.
- Daniel added !root xattr support to cgroupfs.
Userland already uses xattrs on cgroupfs for bookkeeping. This will
allow delegated cgroups to support such usages.
- Prateek tried to make cpuset hotplug handling synchronous but that
led to possible deadlock scenarios. Reverted.
- Other minor changes including release_agent_path handling cleanup.
* 'for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
docs: cgroup-v1: Document the cpuset_v2_mode mount option
Revert "cpuset: Make cpuset hotplug synchronous"
cgroupfs: Support user xattrs
kernfs: Add option to enable user xattrs
kernfs: Add removed_size out param for simple_xattr_set
kernfs: kvmalloc xattr value instead of kmalloc
cgroup: Restructure release_agent_path handling
selftests/cgroup: add tests for cloning into cgroups
clone3: allow spawning processes into cgroups
cgroup: add cgroup_may_write() helper
cgroup: refactor fork helpers
cgroup: add cgroup_get_from_file() helper
cgroup: unify attach permission checking
cpuset: Make cpuset hotplug synchronous
cgroup.c: Use built-in RCU list checking
kselftest/cgroup: add cgroup destruction test
cgroup: Clean up css_set task traversal
Diffstat (limited to 'include/linux/kernfs.h')
| -rw-r--r-- | include/linux/kernfs.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index dded2e5a9f42..89f6a4214a70 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -37,8 +37,10 @@ enum kernfs_node_type { KERNFS_LINK = 0x0004, }; -#define KERNFS_TYPE_MASK 0x000f -#define KERNFS_FLAG_MASK ~KERNFS_TYPE_MASK +#define KERNFS_TYPE_MASK 0x000f +#define KERNFS_FLAG_MASK ~KERNFS_TYPE_MASK +#define KERNFS_MAX_USER_XATTRS 128 +#define KERNFS_USER_XATTR_SIZE_LIMIT (128 << 10) enum kernfs_node_flag { KERNFS_ACTIVATED = 0x0010, @@ -78,6 +80,11 @@ enum kernfs_root_flag { * fhandle to access nodes of the fs. */ KERNFS_ROOT_SUPPORT_EXPORTOP = 0x0004, + + /* + * Support user xattrs to be written to nodes rooted at this root. + */ + KERNFS_ROOT_SUPPORT_USER_XATTR = 0x0008, }; /* type-specific structures for kernfs_node union members */ |