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Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Browse Source 
Pull vfs mount updates from Al Viro:
 "The first part of mount updates.

  Convert filesystems to use the new mount API"

* 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
  mnt_init(): call shmem_init() unconditionally
  constify ksys_mount() string arguments
  don't bother with registering rootfs
  init_rootfs(): don't bother with init_ramfs_fs()
  vfs: Convert smackfs to use the new mount API
  vfs: Convert selinuxfs to use the new mount API
  vfs: Convert securityfs to use the new mount API
  vfs: Convert apparmorfs to use the new mount API
  vfs: Convert openpromfs to use the new mount API
  vfs: Convert xenfs to use the new mount API
  vfs: Convert gadgetfs to use the new mount API
  vfs: Convert oprofilefs to use the new mount API
  vfs: Convert ibmasmfs to use the new mount API
  vfs: Convert qib_fs/ipathfs to use the new mount API
  vfs: Convert efivarfs to use the new mount API
  vfs: Convert configfs to use the new mount API
  vfs: Convert binfmt_misc to use the new mount API
  convenience helper: get_tree_single()
  convenience helper get_tree_nodev()
  vfs: Kill sget_userns()
  ...
This commit is contained in:
Linus Torvalds
2019-07-19 10:42:02 -07:00
parent 5f4fc6d440 037f11b475
commit 933a90bf4f
60 changed files with 584 additions and 536 deletions
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61
kernel/cgroup/cpuset.c
View File

@@ -355,59 +355,6 @@ static inline bool is_in_v2_mode(void)
(cpuset_cgrp_subsys.root->flags & CGRP_ROOT_CPUSET_V2_MODE);
}
/*
* This is ugly, but preserves the userspace API for existing cpuset
* users. If someone tries to mount the "cpuset" filesystem, we
* silently switch it to mount "cgroup" instead
*/
static int cpuset_get_tree(struct fs_context *fc)
{
struct file_system_type *cgroup_fs;
struct fs_context *new_fc;
int ret;
cgroup_fs = get_fs_type("cgroup");
if (!cgroup_fs)
return -ENODEV;
new_fc = fs_context_for_mount(cgroup_fs, fc->sb_flags);
if (IS_ERR(new_fc)) {
ret = PTR_ERR(new_fc);
} else {
static const char agent_path[] = "/sbin/cpuset_release_agent";
ret = vfs_parse_fs_string(new_fc, "cpuset", NULL, 0);
if (!ret)
ret = vfs_parse_fs_string(new_fc, "noprefix", NULL, 0);
if (!ret)
ret = vfs_parse_fs_string(new_fc, "release_agent",
agent_path, sizeof(agent_path) - 1);
if (!ret)
ret = vfs_get_tree(new_fc);
if (!ret) { /* steal the result */
fc->root = new_fc->root;
new_fc->root = NULL;
}
put_fs_context(new_fc);
}
put_filesystem(cgroup_fs);
return ret;
}
static const struct fs_context_operations cpuset_fs_context_ops = {
.get_tree = cpuset_get_tree,
};
static int cpuset_init_fs_context(struct fs_context *fc)
{
fc->ops = &cpuset_fs_context_ops;
return 0;
}
static struct file_system_type cpuset_fs_type = {
.name = "cpuset",
.init_fs_context = cpuset_init_fs_context,
};
/*
* Return in pmask the portion of a cpusets's cpus_allowed that
* are online. If none are online, walk up the cpuset hierarchy
@@ -2853,13 +2800,11 @@ struct cgroup_subsys cpuset_cgrp_subsys = {
/**
* cpuset_init - initialize cpusets at system boot
*
* Description: Initialize top_cpuset and the cpuset internal file system,
* Description: Initialize top_cpuset
**/
int __init cpuset_init(void)
{
int err = 0;
BUG_ON(!alloc_cpumask_var(&top_cpuset.cpus_allowed, GFP_KERNEL));
BUG_ON(!alloc_cpumask_var(&top_cpuset.effective_cpus, GFP_KERNEL));
BUG_ON(!zalloc_cpumask_var(&top_cpuset.subparts_cpus, GFP_KERNEL));
@@ -2873,10 +2818,6 @@ int __init cpuset_init(void)
set_bit(CS_SCHED_LOAD_BALANCE, &top_cpuset.flags);
top_cpuset.relax_domain_level = -1;
err = register_filesystem(&cpuset_fs_type);
if (err < 0)
return err;
BUG_ON(!alloc_cpumask_var(&cpus_attach, GFP_KERNEL));
return 0;