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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2018-07-21 00:56:47 +0300
committerDavid S. Miller <davem@davemloft.net>2018-07-21 09:44:35 +0300
commit488dee96bb62f0b3d9e678cf42574034d5b033a5 (patch)
tree2969d47ffb0ffeaf15d20ffb0eda78a2bb694a40 /fs/sysfs
parent7c4ec749a3bd89237d7195ccd621bf5d4124d6b5 (diff)
downloadlinux-488dee96bb62f0b3d9e678cf42574034d5b033a5.tar.xz
kernfs: allow creating kernfs objects with arbitrary uid/gid
This change allows creating kernfs files and directories with arbitrary uid/gid instead of always using GLOBAL_ROOT_UID/GID by extending kernfs_create_dir_ns() and kernfs_create_file_ns() with uid/gid arguments. The "simple" kernfs_create_file() and kernfs_create_dir() are left alone and always create objects belonging to the global root. When creating symlinks ownership (uid/gid) is taken from the target kernfs object. Co-Developed-by: Tyler Hicks <tyhicks@canonical.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/sysfs')
-rw-r--r--fs/sysfs/dir.c4
-rw-r--r--fs/sysfs/file.c5
2 files changed, 6 insertions, 3 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 58eba92a0e41..e39b884f0867 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -52,7 +52,9 @@ int sysfs_create_dir_ns(struct kobject *kobj, const void *ns)
return -ENOENT;
kn = kernfs_create_dir_ns(parent, kobject_name(kobj),
- S_IRWXU | S_IRUGO | S_IXUGO, kobj, ns);
+ S_IRWXU | S_IRUGO | S_IXUGO,
+ GLOBAL_ROOT_UID, GLOBAL_ROOT_GID,
+ kobj, ns);
if (IS_ERR(kn)) {
if (PTR_ERR(kn) == -EEXIST)
sysfs_warn_dup(parent, kobject_name(kobj));
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 5c13f29bfcdb..513fa691ecbd 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -302,8 +302,9 @@ int sysfs_add_file_mode_ns(struct kernfs_node *parent,
if (!attr->ignore_lockdep)
key = attr->key ?: (struct lock_class_key *)&attr->skey;
#endif
- kn = __kernfs_create_file(parent, attr->name, mode & 0777, size, ops,
- (void *)attr, ns, key);
+ kn = __kernfs_create_file(parent, attr->name,
+ mode & 0777, GLOBAL_ROOT_UID, GLOBAL_ROOT_GID,
+ size, ops, (void *)attr, ns, key);
if (IS_ERR(kn)) {
if (PTR_ERR(kn) == -EEXIST)
sysfs_warn_dup(parent, attr->name);