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[2.205.64.187]) by smtp.gmail.com with ESMTPSA id w17-20020a056402129100b005147503a238sm6263441edv.17.2023.06.07.08.21.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jun 2023 08:21:40 -0700 (PDT) From: Alexander Mikhalitsyn To: xiubli@redhat.com Cc: brauner@kernel.org, stgraber@ubuntu.com, linux-fsdevel@vger.kernel.org, Christian Brauner , Jeff Layton , Ilya Dryomov , ceph-devel@vger.kernel.org, Alexander Mikhalitsyn , linux-kernel@vger.kernel.org Subject: [PATCH v3 11/14] ceph: allow idmapped setattr inode op Date: Wed, 7 Jun 2023 17:20:35 +0200 Message-Id: <20230607152038.469739-12-aleksandr.mikhalitsyn@canonical.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230607152038.469739-1-aleksandr.mikhalitsyn@canonical.com> References: <20230607152038.469739-1-aleksandr.mikhalitsyn@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Christian Brauner Enable __ceph_setattr() to handle idmapped mounts. This is just a matter of passing down the mount's idmapping. Cc: Xiubo Li Cc: Jeff Layton Cc: Ilya Dryomov Cc: ceph-devel@vger.kernel.org Signed-off-by: Christian Brauner [ adapted to b27c82e12965 ("attr: port attribute changes to new types") ] Signed-off-by: Alexander Mikhalitsyn --- v3: - reworked as Christian suggested here: https://lore.kernel.org/lkml/20230602-vorzeichen-praktikum-f17931692301@brauner/ --- fs/ceph/inode.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index bcd9b506ec3b..09c78a67738b 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -2051,17 +2051,27 @@ int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode, dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); + /* + * The attr->ia_{g,u}id members contain the target {g,u}id we're + * sending over the wire. The mount idmapping only matters when we + * create new filesystem objects based on the caller's mapped + * fs{g,u}id. + */ + req->r_mnt_idmap = &nop_mnt_idmap; if (ia_valid & ATTR_UID) { dout("setattr %p uid %d -> %d\n", inode, from_kuid(&init_user_ns, inode->i_uid), from_kuid(&init_user_ns, attr->ia_uid)); if (issued & CEPH_CAP_AUTH_EXCL) { - inode->i_uid = attr->ia_uid; + inode->i_uid = from_vfsuid(idmap, i_user_ns(inode), + attr->ia_vfsuid); dirtied |= CEPH_CAP_AUTH_EXCL; } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || - !uid_eq(attr->ia_uid, inode->i_uid)) { + !uid_eq(from_vfsuid(idmap, i_user_ns(inode), attr->ia_vfsuid), + inode->i_uid)) { + kuid_t fsuid = from_vfsuid(idmap, i_user_ns(inode), attr->ia_vfsuid); req->r_args.setattr.uid = cpu_to_le32( - from_kuid(&init_user_ns, attr->ia_uid)); + from_kuid(&init_user_ns, fsuid)); mask |= CEPH_SETATTR_UID; release |= CEPH_CAP_AUTH_SHARED; } @@ -2071,12 +2081,15 @@ int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode, from_kgid(&init_user_ns, inode->i_gid), from_kgid(&init_user_ns, attr->ia_gid)); if (issued & CEPH_CAP_AUTH_EXCL) { - inode->i_gid = attr->ia_gid; + inode->i_gid = from_vfsgid(idmap, i_user_ns(inode), + attr->ia_vfsgid); dirtied |= CEPH_CAP_AUTH_EXCL; } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || - !gid_eq(attr->ia_gid, inode->i_gid)) { + !gid_eq(from_vfsgid(idmap, i_user_ns(inode), attr->ia_vfsgid), + inode->i_gid)) { + kgid_t fsgid = from_vfsgid(idmap, i_user_ns(inode), attr->ia_vfsgid); req->r_args.setattr.gid = cpu_to_le32( - from_kgid(&init_user_ns, attr->ia_gid)); + from_kgid(&init_user_ns, fsgid)); mask |= CEPH_SETATTR_GID; release |= CEPH_CAP_AUTH_SHARED; } @@ -2241,7 +2254,7 @@ int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry, if (ceph_inode_is_shutdown(inode)) return -ESTALE; - err = setattr_prepare(&nop_mnt_idmap, dentry, attr); + err = setattr_prepare(idmap, dentry, attr); if (err != 0) return err; @@ -2256,7 +2269,7 @@ int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry, err = __ceph_setattr(idmap, inode, attr); if (err >= 0 && (attr->ia_valid & ATTR_MODE)) - err = posix_acl_chmod(&nop_mnt_idmap, dentry, attr->ia_mode); + err = posix_acl_chmod(idmap, dentry, attr->ia_mode); return err; }