[1/2] vfs: add flags argument to ->get_acl() callback

Message ID	20210810120807.456788-2-mszeredi@redhat.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-fsdevel-owner@kernel.org> From: Miklos Szeredi <mszeredi@redhat.com> To: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-unionfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Andreas Gruenbacher <agruenba@redhat.com> Subject: [PATCH 1/2] vfs: add flags argument to ->get_acl() callback Date: Tue, 10 Aug 2021 14:08:06 +0200 Message-Id: <20210810120807.456788-2-mszeredi@redhat.com> In-Reply-To: <20210810120807.456788-1-mszeredi@redhat.com> References: <20210810120807.456788-1-mszeredi@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	allow overlayfs to do RCU lookups \| expand [0/2] allow overlayfs to do RCU lookups [1/2] vfs: add flags argument to ->get_acl() callback [2/2] ovl: enable RCU'd ->get_acl()

diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst index 2183fd8cc350..a6a8f2b34331 100644 --- a/Documentation/filesystems/locking.rst +++ b/Documentation/filesystems/locking.rst @@ -70,7 +70,7 @@ prototypes:: const char *(*get_link) (struct dentry *, struct inode *, struct delayed_call *); void (*truncate) (struct inode *); int (*permission) (struct inode *, int, unsigned int); - int (*get_acl)(struct inode *, int); + struct posix_acl * (*get_acl)(struct inode *, int, int); int (*setattr) (struct dentry *, struct iattr *); int (*getattr) (const struct path *, struct kstat *, u32, unsigned int); ssize_t (*listxattr) (struct dentry *, char *, size_t); diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst index 14c31eced416..dc9339acb66f 100644 --- a/Documentation/filesystems/vfs.rst +++ b/Documentation/filesystems/vfs.rst @@ -432,7 +432,7 @@ As of kernel 2.6.22, the following members are defined: const char *(*get_link) (struct dentry *, struct inode *, struct delayed_call *); int (*permission) (struct user_namespace *, struct inode *, int); - int (*get_acl)(struct inode *, int); + struct posix_acl * (*get_acl)(struct inode *, int, int); int (*setattr) (struct user_namespace *, struct dentry *, struct iattr *); int (*getattr) (struct user_namespace *, const struct path *, struct kstat *, u32, unsigned int); ssize_t (*listxattr) (struct dentry *, char *, size_t); diff --git a/fs/9p/acl.c b/fs/9p/acl.c index bb1b286c49ae..3ef7db80fe29 100644 --- a/fs/9p/acl.c +++ b/fs/9p/acl.c @@ -97,10 +97,13 @@ static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type) return acl; } -struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type) +struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type, int flags) { struct v9fs_session_info *v9ses; + if (flags) + return ERR_PTR(-EINVAL); + v9ses = v9fs_inode2v9ses(inode); if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) || ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) { diff --git a/fs/9p/acl.h b/fs/9p/acl.h index e4f7e882272b..7b31cef9ef5a 100644 --- a/fs/9p/acl.h +++ b/fs/9p/acl.h @@ -16,7 +16,7 @@ #ifdef CONFIG_9P_FS_POSIX_ACL extern int v9fs_get_acl(struct inode *, struct p9_fid *); -extern struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type); +extern struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type, int flags); extern int v9fs_acl_chmod(struct inode *, struct p9_fid *); extern int v9fs_set_create_acl(struct inode *, struct p9_fid *, struct posix_acl *, struct posix_acl *); diff --git a/fs/bad_inode.c b/fs/bad_inode.c index 48e16144c1f7..dd34decddaa6 100644 --- a/fs/bad_inode.c +++ b/fs/bad_inode.c @@ -121,7 +121,7 @@ static const char *bad_inode_get_link(struct dentry *dentry, return ERR_PTR(-EIO); } -static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type) +static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type, int flags) { return ERR_PTR(-EIO); } diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c index d95eb5c8cb37..b53d55186e4a 100644 --- a/fs/btrfs/acl.c +++ b/fs/btrfs/acl.c @@ -16,13 +16,16 @@ #include "btrfs_inode.h" #include "xattr.h" -struct posix_acl *btrfs_get_acl(struct inode *inode, int type) +struct posix_acl *btrfs_get_acl(struct inode *inode, int type, int flags) { int size; const char *name; char *value = NULL; struct posix_acl *acl; + if (flags) + return ERR_PTR(-EINVAL); + switch (type) { case ACL_TYPE_ACCESS: name = XATTR_NAME_POSIX_ACL_ACCESS; diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index e5e53e592d4f..460a64266066 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3686,7 +3686,7 @@ static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) /* acl.c */ #ifdef CONFIG_BTRFS_FS_POSIX_ACL -struct posix_acl *btrfs_get_acl(struct inode *inode, int type); +struct posix_acl *btrfs_get_acl(struct inode *inode, int type, int flags); int btrfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); int btrfs_init_acl(struct btrfs_trans_handle *trans, diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c index 529af59d9fd3..61e4f866d162 100644 --- a/fs/ceph/acl.c +++ b/fs/ceph/acl.c @@ -29,7 +29,7 @@ static inline void ceph_set_cached_acl(struct inode *inode, spin_unlock(&ci->i_ceph_lock); } -struct posix_acl *ceph_get_acl(struct inode *inode, int type) +struct posix_acl *ceph_get_acl(struct inode *inode, int type, int flags) { int size; unsigned int retry_cnt = 0; @@ -37,6 +37,9 @@ struct posix_acl *ceph_get_acl(struct inode *inode, int type) char *value = NULL; struct posix_acl *acl; + if (flags) + return ERR_PTR(-EINVAL); + switch (type) { case ACL_TYPE_ACCESS: name = XATTR_NAME_POSIX_ACL_ACCESS; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 6b6332a5c113..528975f199eb 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1087,7 +1087,7 @@ void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); /* acl.c */ #ifdef CONFIG_CEPH_FS_POSIX_ACL -struct posix_acl *ceph_get_acl(struct inode *, int); +struct posix_acl *ceph_get_acl(struct inode *, int, int); int ceph_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); int ceph_pre_init_acls(struct inode *dir, umode_t *mode, diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c index 8dd54b420a1d..10c0d639d794 100644 --- a/fs/erofs/xattr.c +++ b/fs/erofs/xattr.c @@ -673,12 +673,15 @@ ssize_t erofs_listxattr(struct dentry *dentry, } #ifdef CONFIG_EROFS_FS_POSIX_ACL -struct posix_acl *erofs_get_acl(struct inode *inode, int type) +struct posix_acl *erofs_get_acl(struct inode *inode, int type, int flags) { struct posix_acl *acl; int prefix, rc; char *value = NULL; + if (flags) + return ERR_PTR(-EINVAL); + switch (type) { case ACL_TYPE_ACCESS: prefix = EROFS_XATTR_INDEX_POSIX_ACL_ACCESS; diff --git a/fs/erofs/xattr.h b/fs/erofs/xattr.h index 366dcb400525..ac35b5886eff 100644 --- a/fs/erofs/xattr.h +++ b/fs/erofs/xattr.h @@ -80,7 +80,7 @@ static inline int erofs_getxattr(struct inode *inode, int index, #endif /* !CONFIG_EROFS_FS_XATTR */ #ifdef CONFIG_EROFS_FS_POSIX_ACL -struct posix_acl *erofs_get_acl(struct inode *inode, int type); +struct posix_acl *erofs_get_acl(struct inode *inode, int type, int flags); #else #define erofs_get_acl (NULL) #endif diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c index b9a9db98e94b..e203ebd224c4 100644 --- a/fs/ext2/acl.c +++ b/fs/ext2/acl.c @@ -141,13 +141,16 @@ ext2_acl_to_disk(const struct posix_acl *acl, size_t *size) * inode->i_mutex: don't care */ struct posix_acl * -ext2_get_acl(struct inode *inode, int type) +ext2_get_acl(struct inode *inode, int type, int flags) { int name_index; char *value = NULL; struct posix_acl *acl; int retval; + if (flags) + return ERR_PTR(-EINVAL); + switch (type) { case ACL_TYPE_ACCESS: name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS; diff --git a/fs/ext2/acl.h b/fs/ext2/acl.h index 917db5f6630a..0bd53a953831 100644 --- a/fs/ext2/acl.h +++ b/fs/ext2/acl.h @@ -55,7 +55,7 @@ static inline int ext2_acl_count(size_t size) #ifdef CONFIG_EXT2_FS_POSIX_ACL /* acl.c */ -extern struct posix_acl *ext2_get_acl(struct inode *inode, int type); +extern struct posix_acl *ext2_get_acl(struct inode *inode, int type, int flags); extern int ext2_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); extern int ext2_init_acl (struct inode *, struct inode *); diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c index c5eaffccecc3..e4e27e34a221 100644 --- a/fs/ext4/acl.c +++ b/fs/ext4/acl.c @@ -142,13 +142,16 @@ ext4_acl_to_disk(const struct posix_acl *acl, size_t *size) * inode->i_mutex: don't care */ struct posix_acl * -ext4_get_acl(struct inode *inode, int type) +ext4_get_acl(struct inode *inode, int type, int flags) { int name_index; char *value = NULL; struct posix_acl *acl; int retval; + if (flags) + return ERR_PTR(-EINVAL); + switch (type) { case ACL_TYPE_ACCESS: name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS; diff --git a/fs/ext4/acl.h b/fs/ext4/acl.h index 84b8942a57f2..b349365c7b33 100644 --- a/fs/ext4/acl.h +++ b/fs/ext4/acl.h @@ -55,7 +55,7 @@ static inline int ext4_acl_count(size_t size) #ifdef CONFIG_EXT4_FS_POSIX_ACL /* acl.c */ -struct posix_acl *ext4_get_acl(struct inode *inode, int type); +struct posix_acl *ext4_get_acl(struct inode *inode, int type, int flags); int ext4_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); extern int ext4_init_acl(handle_t *, struct inode *, struct inode *); diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c index 239ad9453b99..4d1b348a0ab7 100644 --- a/fs/f2fs/acl.c +++ b/fs/f2fs/acl.c @@ -196,8 +196,11 @@ static struct posix_acl *__f2fs_get_acl(struct inode *inode, int type, return acl; } -struct posix_acl *f2fs_get_acl(struct inode *inode, int type) +struct posix_acl *f2fs_get_acl(struct inode *inode, int type, int flags) { + if (flags) + return ERR_PTR(-EINVAL); + return __f2fs_get_acl(inode, type, NULL); } diff --git a/fs/f2fs/acl.h b/fs/f2fs/acl.h index 986fd1bc780b..3b7b0deb2845 100644 --- a/fs/f2fs/acl.h +++ b/fs/f2fs/acl.h @@ -33,7 +33,7 @@ struct f2fs_acl_header { #ifdef CONFIG_F2FS_FS_POSIX_ACL -extern struct posix_acl *f2fs_get_acl(struct inode *, int); +extern struct posix_acl *f2fs_get_acl(struct inode *, int, int); extern int f2fs_set_acl(struct user_namespace *, struct inode *, struct posix_acl *, int); extern int f2fs_init_acl(struct inode *, struct inode *, struct page *, diff --git a/fs/fuse/acl.c b/fs/fuse/acl.c index 52b165319be1..194cb81634f9 100644 --- a/fs/fuse/acl.c +++ b/fs/fuse/acl.c @@ -11,7 +11,7 @@ #include <linux/posix_acl.h> #include <linux/posix_acl_xattr.h> -struct posix_acl *fuse_get_acl(struct inode *inode, int type) +struct posix_acl *fuse_get_acl(struct inode *inode, int type, int flags) { struct fuse_conn *fc = get_fuse_conn(inode); int size; @@ -19,6 +19,9 @@ struct posix_acl *fuse_get_acl(struct inode *inode, int type) void *value = NULL; struct posix_acl *acl; + if (flags) + return ERR_PTR(-EINVAL); + if (fuse_is_bad(inode)) return ERR_PTR(-EIO); diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 07829ce78695..ba3a419c6766 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -1216,7 +1216,7 @@ extern const struct xattr_handler *fuse_acl_xattr_handlers[]; extern const struct xattr_handler *fuse_no_acl_xattr_handlers[]; struct posix_acl; -struct posix_acl *fuse_get_acl(struct inode *inode, int type); +struct posix_acl *fuse_get_acl(struct inode *inode, int type, int flags); int fuse_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c index 9165d70ead07..956132de223c 100644 --- a/fs/gfs2/acl.c +++ b/fs/gfs2/acl.c @@ -57,13 +57,16 @@ static struct posix_acl *__gfs2_get_acl(struct inode *inode, int type) return acl; } -struct posix_acl *gfs2_get_acl(struct inode *inode, int type) +struct posix_acl *gfs2_get_acl(struct inode *inode, int type, int flags) { struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_holder gh; bool need_unlock = false; struct posix_acl *acl; + if (flags) + return ERR_PTR(-EINVAL); + if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { int ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); diff --git a/fs/gfs2/acl.h b/fs/gfs2/acl.h index eccc6a43326c..cdf8f12089de 100644 --- a/fs/gfs2/acl.h +++ b/fs/gfs2/acl.h @@ -11,7 +11,7 @@ #define GFS2_ACL_MAX_ENTRIES(sdp) ((300 << (sdp)->sd_sb.sb_bsize_shift) >> 12) -extern struct posix_acl *gfs2_get_acl(struct inode *inode, int type); +extern struct posix_acl *gfs2_get_acl(struct inode *inode, int type, int flags); extern int __gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type); extern int gfs2_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c index 55a79df70d24..35f4a0dcbd71 100644 --- a/fs/jffs2/acl.c +++ b/fs/jffs2/acl.c @@ -173,12 +173,15 @@ static void *jffs2_acl_to_medium(const struct posix_acl *acl, size_t *size) return ERR_PTR(-EINVAL); } -struct posix_acl *jffs2_get_acl(struct inode *inode, int type) +struct posix_acl *jffs2_get_acl(struct inode *inode, int type, int flags) { struct posix_acl *acl; char *value = NULL; int rc, xprefix; + if (flags) + return ERR_PTR(-EINVAL); + switch (type) { case ACL_TYPE_ACCESS: xprefix = JFFS2_XPREFIX_ACL_ACCESS; diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h index 62c50da9d493..afd6f924aacb 100644 --- a/fs/jffs2/acl.h +++ b/fs/jffs2/acl.h @@ -27,7 +27,7 @@ struct jffs2_acl_header { #ifdef CONFIG_JFFS2_FS_POSIX_ACL -struct posix_acl *jffs2_get_acl(struct inode *inode, int type); +struct posix_acl *jffs2_get_acl(struct inode *inode, int type, int flags); int jffs2_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); extern int jffs2_init_acl_pre(struct inode *, struct inode *, umode_t *); diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c index 43c285c3d2a7..344d047bcb97 100644 --- a/fs/jfs/acl.c +++ b/fs/jfs/acl.c @@ -14,13 +14,16 @@ #include "jfs_xattr.h" #include "jfs_acl.h" -struct posix_acl *jfs_get_acl(struct inode *inode, int type) +struct posix_acl *jfs_get_acl(struct inode *inode, int type, int flags) { struct posix_acl *acl; char *ea_name; int size; char *value = NULL; + if (flags) + return ERR_PTR(-EINVAL); + switch(type) { case ACL_TYPE_ACCESS: ea_name = XATTR_NAME_POSIX_ACL_ACCESS; diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h index 7ae389a7a366..e86997d1f123 100644 --- a/fs/jfs/jfs_acl.h +++ b/fs/jfs/jfs_acl.h @@ -7,7 +7,7 @@ #ifdef CONFIG_JFS_POSIX_ACL -struct posix_acl *jfs_get_acl(struct inode *inode, int type); +struct posix_acl *jfs_get_acl(struct inode *inode, int type, int flags); int jfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); int jfs_init_acl(tid_t, struct inode *, struct inode *); diff --git a/fs/nfs/nfs3_fs.h b/fs/nfs/nfs3_fs.h index c8a192802dda..0f3ba2f3b8da 100644 --- a/fs/nfs/nfs3_fs.h +++ b/fs/nfs/nfs3_fs.h @@ -11,7 +11,7 @@ * nfs3acl.c */ #ifdef CONFIG_NFS_V3_ACL -extern struct posix_acl *nfs3_get_acl(struct inode *inode, int type); +extern struct posix_acl *nfs3_get_acl(struct inode *inode, int type, int flags); extern int nfs3_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); extern int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c index 9ec560aa4a50..f94def1342c6 100644 --- a/fs/nfs/nfs3acl.c +++ b/fs/nfs/nfs3acl.c @@ -44,7 +44,7 @@ static void nfs3_abort_get_acl(struct posix_acl **p) cmpxchg(p, sentinel, ACL_NOT_CACHED); } -struct posix_acl *nfs3_get_acl(struct inode *inode, int type) +struct posix_acl *nfs3_get_acl(struct inode *inode, int type, int flags) { struct nfs_server *server = NFS_SERVER(inode); struct page *pages[NFSACL_MAXPAGES] = { }; @@ -62,6 +62,9 @@ struct posix_acl *nfs3_get_acl(struct inode *inode, int type) }; int status, count; + if (flags) + return ERR_PTR(-EINVAL); + if (!nfs_server_capable(inode, NFS_CAP_ACLS)) return ERR_PTR(-EOPNOTSUPP); diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c index 5c72a7e6d6c5..a4df6e30c017 100644 --- a/fs/ocfs2/acl.c +++ b/fs/ocfs2/acl.c @@ -289,7 +289,7 @@ int ocfs2_iop_set_acl(struct user_namespace *mnt_userns, struct inode *inode, return status; } -struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type) +struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type, int flags) { struct ocfs2_super *osb; struct buffer_head *di_bh = NULL; @@ -297,6 +297,9 @@ struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type) int had_lock; struct ocfs2_lock_holder oh; + if (flags) + return ERR_PTR(-EINVAL); + osb = OCFS2_SB(inode->i_sb); if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL)) return NULL; diff --git a/fs/ocfs2/acl.h b/fs/ocfs2/acl.h index f59d8d0a61fa..e005c93b9153 100644 --- a/fs/ocfs2/acl.h +++ b/fs/ocfs2/acl.h @@ -16,7 +16,7 @@ struct ocfs2_acl_entry { __le32 e_id; }; -struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type); +struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type, int flags); int ocfs2_iop_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); extern int ocfs2_acl_chmod(struct inode *, struct buffer_head *); diff --git a/fs/orangefs/acl.c b/fs/orangefs/acl.c index 18852b9ed82b..d93841d478ed 100644 --- a/fs/orangefs/acl.c +++ b/fs/orangefs/acl.c @@ -10,12 +10,15 @@ #include "orangefs-bufmap.h" #include <linux/posix_acl_xattr.h> -struct posix_acl *orangefs_get_acl(struct inode *inode, int type) +struct posix_acl *orangefs_get_acl(struct inode *inode, int type, int flags) { struct posix_acl *acl; int ret; char *key = NULL, *value = NULL; + if (flags) + return ERR_PTR(-EINVAL); + switch (type) { case ACL_TYPE_ACCESS: key = XATTR_NAME_POSIX_ACL_ACCESS; diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h index 0e6b97682e41..370bd89c670f 100644 --- a/fs/orangefs/orangefs-kernel.h +++ b/fs/orangefs/orangefs-kernel.h @@ -106,7 +106,7 @@ enum orangefs_vfs_op_states { extern int orangefs_init_acl(struct inode *inode, struct inode *dir); extern const struct xattr_handler *orangefs_xattr_handlers[]; -extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type); +extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type, int flags); extern int orangefs_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 5e828a1c98a8..727154a1d3ce 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -448,12 +448,15 @@ ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size) return res; } -struct posix_acl *ovl_get_acl(struct inode *inode, int type) +struct posix_acl *ovl_get_acl(struct inode *inode, int type, int flags) { struct inode *realinode = ovl_inode_real(inode); const struct cred *old_cred; struct posix_acl *acl; + if (flags) + return ERR_PTR(-EINVAL); + if (!IS_ENABLED(CONFIG_FS_POSIX_ACL) || !IS_POSIXACL(realinode)) return NULL; diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 6ec73db4bf9e..daf6b75b9a54 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -485,7 +485,7 @@ int ovl_xattr_set(struct dentry *dentry, struct inode *inode, const char *name, int ovl_xattr_get(struct dentry *dentry, struct inode *inode, const char *name, void *value, size_t size); ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size); -struct posix_acl *ovl_get_acl(struct inode *inode, int type); +struct posix_acl *ovl_get_acl(struct inode *inode, int type, int flags); int ovl_update_time(struct inode *inode, struct timespec64 *ts, int flags); bool ovl_is_private_xattr(struct super_block *sb, const char *name); diff --git a/fs/posix_acl.c b/fs/posix_acl.c index f3309a7edb49..6b7f793e2b6f 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -138,7 +138,7 @@ struct posix_acl *get_acl(struct inode *inode, int type) set_cached_acl(inode, type, NULL); return NULL; } - acl = inode->i_op->get_acl(inode, type); + acl = inode->i_op->get_acl(inode, type, 0); if (IS_ERR(acl)) { /* diff --git a/fs/reiserfs/acl.h b/fs/reiserfs/acl.h index fd58618da360..bf10841b892d 100644 --- a/fs/reiserfs/acl.h +++ b/fs/reiserfs/acl.h @@ -48,7 +48,7 @@ static inline int reiserfs_acl_count(size_t size) } #ifdef CONFIG_REISERFS_FS_POSIX_ACL -struct posix_acl *reiserfs_get_acl(struct inode *inode, int type); +struct posix_acl *reiserfs_get_acl(struct inode *inode, int type, int flags); int reiserfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); int reiserfs_acl_chmod(struct inode *inode); diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index a9547144a099..0fdb4f531098 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -190,13 +190,16 @@ static void *reiserfs_posix_acl_to_disk(const struct posix_acl *acl, size_t * si * inode->i_mutex: down * BKL held [before 2.5.x] */ -struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) +struct posix_acl *reiserfs_get_acl(struct inode *inode, int type, int flags) { char *name, *value; struct posix_acl *acl; int size; int retval; + if (flags) + return ERR_PTR(-EINVAL); + switch (type) { case ACL_TYPE_ACCESS: name = XATTR_NAME_POSIX_ACL_ACCESS; diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c index d02bef24b32b..5f9b541e029d 100644 --- a/fs/xfs/xfs_acl.c +++ b/fs/xfs/xfs_acl.c @@ -125,7 +125,7 @@ xfs_acl_to_disk(struct xfs_acl *aclp, const struct posix_acl *acl) } struct posix_acl * -xfs_get_acl(struct inode *inode, int type) +xfs_get_acl(struct inode *inode, int type, int flags) { struct xfs_inode *ip = XFS_I(inode); struct xfs_mount *mp = ip->i_mount; @@ -137,6 +137,9 @@ xfs_get_acl(struct inode *inode, int type) }; int error; + if (flags) + return ERR_PTR(-EINVAL); + trace_xfs_get_acl(ip); switch (type) { diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h index 7bdb3a4ed798..38f933f2e281 100644 --- a/fs/xfs/xfs_acl.h +++ b/fs/xfs/xfs_acl.h @@ -10,13 +10,13 @@ struct inode; struct posix_acl; #ifdef CONFIG_XFS_POSIX_ACL -extern struct posix_acl *xfs_get_acl(struct inode *inode, int type); +extern struct posix_acl *xfs_get_acl(struct inode *inode, int type, int flags); extern int xfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode, struct posix_acl *acl, int type); extern int __xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); void xfs_forget_acl(struct inode *inode, const char *name); #else -static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type) +static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type, int flags) { return NULL; } diff --git a/include/linux/fs.h b/include/linux/fs.h index 640574294216..1c56d4fc4efe 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2065,7 +2065,7 @@ struct inode_operations { struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int); const char * (*get_link) (struct dentry *, struct inode *, struct delayed_call *); int (*permission) (struct user_namespace *, struct inode *, int); - struct posix_acl * (*get_acl)(struct inode *, int); + struct posix_acl * (*get_acl)(struct inode *, int, int); int (*readlink) (struct dentry *, char __user *,int);

[1/2] vfs: add flags argument to ->get_acl() callback

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