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authorChristian Brauner <brauner@kernel.org>2022-06-21 16:14:51 +0200
committerChristian Brauner (Microsoft) <brauner@kernel.org>2022-06-26 18:18:55 +0200
commit35faf3109a78516f60ca13f957083d5e5535fde0 (patch)
tree50c3ddabd30c0007ea625af2368d38f962a7225a /fs/attr.c
parentfs: introduce tiny iattr ownership update helpers (diff)
downloadlinux-dev-35faf3109a78516f60ca13f957083d5e5535fde0.tar.xz
linux-dev-35faf3109a78516f60ca13f957083d5e5535fde0.zip
fs: port to iattr ownership update helpers
Earlier we introduced new helpers to abstract ownership update and remove code duplication. This converts all filesystems supporting idmapped mounts to make use of these new helpers. For now we always pass the initial idmapping which makes the idmapping functions these helpers call nops. This is done because we currently always pass the actual value to be written to i_{g,u}id via struct iattr. While this allowed us to treat the {g,u}id values in struct iattr as values that can be directly written to inode->i_{g,u}id it also increases the potential for confusion for filesystems. Now that we are have dedicated types to prevent this confusion we will ultimately only map the value from the idmapped mount into a filesystem value that can be written to inode->i_{g,u}id when the filesystem actually updates the inode. So pass down the initial idmapping until we finished that conversion at which point we pass down the mount's idmapping. No functional changes intended. Link: https://lore.kernel.org/r/20220621141454.2914719-6-brauner@kernel.org Cc: Seth Forshee <sforshee@digitalocean.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Aleksa Sarai <cyphar@cyphar.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> CC: linux-fsdevel@vger.kernel.org Reviewed-by: Seth Forshee <sforshee@digitalocean.com> Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Diffstat (limited to 'fs/attr.c')
-rw-r--r--fs/attr.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/attr.c b/fs/attr.c
index dbe996b0dedf..2e180dd9460f 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -242,10 +242,8 @@ void setattr_copy(struct user_namespace *mnt_userns, struct inode *inode,
{
unsigned int ia_valid = attr->ia_valid;
- if (ia_valid & ATTR_UID)
- inode->i_uid = attr->ia_uid;
- if (ia_valid & ATTR_GID)
- inode->i_gid = attr->ia_gid;
+ i_uid_update(&init_user_ns, attr, inode);
+ i_gid_update(&init_user_ns, attr, inode);
if (ia_valid & ATTR_ATIME)
inode->i_atime = attr->ia_atime;
if (ia_valid & ATTR_MTIME)