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| author |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-07-20 21:56:47 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-07-20 23:44:35 -0700 |
| commit | 488dee96bb62f0b3d9e678cf42574034d5b033a5 (patch) | |
| tree | 2969d47ffb0ffeaf15d20ffb0eda78a2bb694a40 /fs/sysfs | |
| parent | net: Init backlog NAPI's gro_hash. (diff) | |
| download | wireguard-linux-488dee96bb62f0b3d9e678cf42574034d5b033a5.tar.xz wireguard-linux-488dee96bb62f0b3d9e678cf42574034d5b033a5.zip | |
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.c | 4 | ||||
| -rw-r--r-- | fs/sysfs/file.c | 5 |
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); |