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authorChristian Brauner <brauner@kernel.org>2022-06-21 17:14:51 +0300
committerChristian Brauner (Microsoft) <brauner@kernel.org>2022-06-26 19:18:55 +0300
commit35faf3109a78516f60ca13f957083d5e5535fde0 (patch)
tree50c3ddabd30c0007ea625af2368d38f962a7225a /fs/ext2
parent1f36146a5a3dc6098566d34a9886f9e97c88d93e (diff)
downloadlinux-35faf3109a78516f60ca13f957083d5e5535fde0.tar.xz
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/ext2')
-rw-r--r--fs/ext2/inode.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index e6b932219803..6dc66ab97d20 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1684,8 +1684,8 @@ int ext2_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
if (error)
return error;
}
- if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
- (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
+ if (i_uid_needs_update(&init_user_ns, iattr, inode) ||
+ i_gid_needs_update(&init_user_ns, iattr, inode)) {
error = dquot_transfer(inode, iattr);
if (error)
return error;