+ if (!NATIVE_XATTR(tdvp) && (vp->v_type == VREG)) {
+ const char *vname;
+
+ vname = vnode_getname(vp);
+ if (vname != NULL) {
+ _err = 0;
+ if (vname[0] == '.' && vname[1] == '_' && vname[2] != '\0') {
+ _err = EPERM;
+ }
+ vnode_putname(vname);
+ if (_err) {
+ return _err;
+ }
+ }
+ }
+#endif /* CONFIG_APPLEDOUBLE */
+
+ a.a_desc = &vnop_link_desc;
+ a.a_vp = vp;
+ a.a_tdvp = tdvp;
+ a.a_cnp = cnp;
+ a.a_context = ctx;
+
+ _err = (*tdvp->v_op[vnop_link_desc.vdesc_offset])(&a);
+ DTRACE_FSINFO(link, vnode_t, vp);
+
+ post_event_if_success(vp, _err, NOTE_LINK);
+ post_event_if_success(tdvp, _err, NOTE_WRITE);
+
+ return _err;
+}
+
+errno_t
+vn_rename(struct vnode *fdvp, struct vnode **fvpp, struct componentname *fcnp, struct vnode_attr *fvap,
+ struct vnode *tdvp, struct vnode **tvpp, struct componentname *tcnp, struct vnode_attr *tvap,
+ vfs_rename_flags_t flags, vfs_context_t ctx)
+{
+ int _err;
+ struct nameidata *fromnd = NULL;
+ struct nameidata *tond = NULL;
+#if CONFIG_APPLEDOUBLE
+ vnode_t src_attr_vp = NULLVP;
+ vnode_t dst_attr_vp = NULLVP;
+ char smallname1[48];
+ char smallname2[48];
+ char *xfromname = NULL;
+ char *xtoname = NULL;
+#endif /* CONFIG_APPLEDOUBLE */
+ int batched;
+ uint32_t tdfflags; // Target directory file flags
+
+ batched = vnode_compound_rename_available(fdvp);
+
+ if (!batched) {
+ if (*fvpp == NULLVP) {
+ panic("Not batched, and no fvp?");
+ }
+ }
+
+#if CONFIG_APPLEDOUBLE
+ /*
+ * We need to preflight any potential AppleDouble file for the source file
+ * before doing the rename operation, since we could potentially be doing
+ * this operation on a network filesystem, and would end up duplicating
+ * the work. Also, save the source and destination names. Skip it if the
+ * source has a "._" prefix.
+ */
+
+ if (!NATIVE_XATTR(fdvp) &&
+ !(fcnp->cn_nameptr[0] == '.' && fcnp->cn_nameptr[1] == '_')) {
+ size_t len;
+ int error;
+
+ /* Get source attribute file name. */
+ len = fcnp->cn_namelen + 3;
+ if (len > sizeof(smallname1)) {
+ MALLOC(xfromname, char *, len, M_TEMP, M_WAITOK);
+ } else {
+ xfromname = &smallname1[0];
+ }
+ strlcpy(xfromname, "._", len);
+ strlcat(xfromname, fcnp->cn_nameptr, len);
+
+ /* Get destination attribute file name. */
+ len = tcnp->cn_namelen + 3;
+ if (len > sizeof(smallname2)) {
+ MALLOC(xtoname, char *, len, M_TEMP, M_WAITOK);
+ } else {
+ xtoname = &smallname2[0];
+ }
+ strlcpy(xtoname, "._", len);
+ strlcat(xtoname, tcnp->cn_nameptr, len);
+
+ /*
+ * Look up source attribute file, keep reference on it if exists.
+ * Note that we do the namei with the nameiop of RENAME, which is different than
+ * in the rename syscall. It's OK if the source file does not exist, since this
+ * is only for AppleDouble files.
+ */
+ MALLOC(fromnd, struct nameidata *, sizeof(struct nameidata), M_TEMP, M_WAITOK);
+ NDINIT(fromnd, RENAME, OP_RENAME, NOFOLLOW | USEDVP | CN_NBMOUNTLOOK,
+ UIO_SYSSPACE, CAST_USER_ADDR_T(xfromname), ctx);
+ fromnd->ni_dvp = fdvp;
+ error = namei(fromnd);
+
+ /*
+ * If there was an error looking up source attribute file,
+ * we'll behave as if it didn't exist.
+ */
+
+ if (error == 0) {
+ if (fromnd->ni_vp) {
+ /* src_attr_vp indicates need to call vnode_put / nameidone later */
+ src_attr_vp = fromnd->ni_vp;
+
+ if (fromnd->ni_vp->v_type != VREG) {
+ src_attr_vp = NULLVP;
+ vnode_put(fromnd->ni_vp);
+ }
+ }
+ /*
+ * Either we got an invalid vnode type (not a regular file) or the namei lookup
+ * suppressed ENOENT as a valid error since we're renaming. Either way, we don't
+ * have a vnode here, so we drop our namei buffer for the source attribute file
+ */
+ if (src_attr_vp == NULLVP) {
+ nameidone(fromnd);
+ }
+ }
+ }
+#endif /* CONFIG_APPLEDOUBLE */
+
+ if (batched) {
+ _err = VNOP_COMPOUND_RENAME(fdvp, fvpp, fcnp, fvap, tdvp, tvpp, tcnp, tvap, flags, ctx);
+ if (_err != 0) {
+ printf("VNOP_COMPOUND_RENAME() returned %d\n", _err);
+ }
+ } else {
+ if (flags) {
+ _err = VNOP_RENAMEX(fdvp, *fvpp, fcnp, tdvp, *tvpp, tcnp, flags, ctx);
+ if (_err == ENOTSUP && flags == VFS_RENAME_SECLUDE) {
+ // Legacy...
+ if ((*fvpp)->v_mount->mnt_vtable->vfc_vfsflags & VFC_VFSVNOP_SECLUDE_RENAME) {
+ fcnp->cn_flags |= CN_SECLUDE_RENAME;
+ _err = VNOP_RENAME(fdvp, *fvpp, fcnp, tdvp, *tvpp, tcnp, ctx);
+ }
+ }
+ } else {
+ _err = VNOP_RENAME(fdvp, *fvpp, fcnp, tdvp, *tvpp, tcnp, ctx);
+ }
+ }
+
+ /*
+ * If moved to a new directory that is restricted,
+ * set the restricted flag on the item moved.
+ */
+ if (_err == 0) {
+ _err = vnode_flags(tdvp, &tdfflags, ctx);
+ if (_err == 0) {
+ uint32_t inherit_flags = tdfflags & (UF_DATAVAULT | SF_RESTRICTED);
+ if (inherit_flags) {
+ uint32_t fflags;
+ _err = vnode_flags(*fvpp, &fflags, ctx);
+ if (_err == 0 && fflags != (fflags | inherit_flags)) {
+ struct vnode_attr va;
+ VATTR_INIT(&va);
+ VATTR_SET(&va, va_flags, fflags | inherit_flags);
+ _err = vnode_setattr(*fvpp, &va, ctx);
+ }
+ }
+ }
+ }
+
+#if CONFIG_MACF
+ if (_err == 0) {
+ mac_vnode_notify_rename(ctx, *fvpp, tdvp, tcnp);
+ if (flags & VFS_RENAME_SWAP) {
+ mac_vnode_notify_rename(ctx, *tvpp, fdvp, fcnp);
+ }
+ }
+#endif
+
+#if CONFIG_APPLEDOUBLE
+ /*
+ * Rename any associated extended attribute file (._ AppleDouble file).
+ */
+ if (_err == 0 && !NATIVE_XATTR(fdvp) && xfromname != NULL) {
+ int error = 0;
+
+ /*
+ * Get destination attribute file vnode.
+ * Note that tdvp already has an iocount reference. Make sure to check that we
+ * get a valid vnode from namei.
+ */
+ MALLOC(tond, struct nameidata *, sizeof(struct nameidata), M_TEMP, M_WAITOK);
+ NDINIT(tond, RENAME, OP_RENAME,
+ NOCACHE | NOFOLLOW | USEDVP | CN_NBMOUNTLOOK, UIO_SYSSPACE,
+ CAST_USER_ADDR_T(xtoname), ctx);
+ tond->ni_dvp = tdvp;
+ error = namei(tond);
+
+ if (error) {
+ goto ad_error;
+ }
+
+ if (tond->ni_vp) {
+ dst_attr_vp = tond->ni_vp;
+ }
+
+ if (src_attr_vp) {
+ const char *old_name = src_attr_vp->v_name;
+ vnode_t old_parent = src_attr_vp->v_parent;
+
+ if (batched) {
+ error = VNOP_COMPOUND_RENAME(fdvp, &src_attr_vp, &fromnd->ni_cnd, NULL,
+ tdvp, &dst_attr_vp, &tond->ni_cnd, NULL,
+ 0, ctx);
+ } else {
+ error = VNOP_RENAME(fdvp, src_attr_vp, &fromnd->ni_cnd,
+ tdvp, dst_attr_vp, &tond->ni_cnd, ctx);
+ }
+
+ if (error == 0 && old_name == src_attr_vp->v_name &&
+ old_parent == src_attr_vp->v_parent) {
+ int update_flags = VNODE_UPDATE_NAME;
+
+ if (fdvp != tdvp) {
+ update_flags |= VNODE_UPDATE_PARENT;
+ }
+
+ if ((src_attr_vp->v_mount->mnt_vtable->vfc_vfsflags & VFC_VFSVNOP_NOUPDATEID_RENAME) == 0) {
+ vnode_update_identity(src_attr_vp, tdvp,
+ tond->ni_cnd.cn_nameptr,
+ tond->ni_cnd.cn_namelen,
+ tond->ni_cnd.cn_hash,
+ update_flags);
+ }
+ }
+
+ /* kevent notifications for moving resource files
+ * _err is zero if we're here, so no need to notify directories, code
+ * below will do that. only need to post the rename on the source and
+ * possibly a delete on the dest
+ */
+ post_event_if_success(src_attr_vp, error, NOTE_RENAME);
+ if (dst_attr_vp) {
+ post_event_if_success(dst_attr_vp, error, NOTE_DELETE);
+ }
+ } else if (dst_attr_vp) {
+ /*
+ * Just delete destination attribute file vnode if it exists, since
+ * we didn't have a source attribute file.
+ * Note that tdvp already has an iocount reference.
+ */
+
+ struct vnop_remove_args args;
+
+ args.a_desc = &vnop_remove_desc;
+ args.a_dvp = tdvp;
+ args.a_vp = dst_attr_vp;
+ args.a_cnp = &tond->ni_cnd;
+ args.a_context = ctx;
+
+ if (error == 0) {
+ error = (*tdvp->v_op[vnop_remove_desc.vdesc_offset])(&args);
+
+ if (error == 0) {
+ vnode_setneedinactive(dst_attr_vp);
+ }
+ }
+
+ /* kevent notification for deleting the destination's attribute file
+ * if it existed. Only need to post the delete on the destination, since
+ * the code below will handle the directories.
+ */
+ post_event_if_success(dst_attr_vp, error, NOTE_DELETE);
+ }
+ }
+ad_error:
+ if (src_attr_vp) {
+ vnode_put(src_attr_vp);
+ nameidone(fromnd);
+ }
+ if (dst_attr_vp) {
+ vnode_put(dst_attr_vp);
+ nameidone(tond);
+ }
+ if (xfromname && xfromname != &smallname1[0]) {
+ FREE(xfromname, M_TEMP);
+ }
+ if (xtoname && xtoname != &smallname2[0]) {
+ FREE(xtoname, M_TEMP);
+ }
+#endif /* CONFIG_APPLEDOUBLE */
+ if (fromnd) {
+ FREE(fromnd, M_TEMP);
+ }
+ if (tond) {
+ FREE(tond, M_TEMP);
+ }
+ return _err;
+}
+
+
+#if 0
+/*
+*#
+*#% rename fdvp U U U
+*#% rename fvp U U U
+*#% rename tdvp L U U
+*#% rename tvp X U U
+*#
+*/
+struct vnop_rename_args {
+ struct vnodeop_desc *a_desc;
+ vnode_t a_fdvp;
+ vnode_t a_fvp;
+ struct componentname *a_fcnp;
+ vnode_t a_tdvp;
+ vnode_t a_tvp;
+ struct componentname *a_tcnp;
+ vfs_context_t a_context;
+};
+#endif /* 0*/
+errno_t
+VNOP_RENAME(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp,
+ struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp,
+ vfs_context_t ctx)
+{
+ int _err = 0;
+ struct vnop_rename_args a;
+
+ a.a_desc = &vnop_rename_desc;
+ a.a_fdvp = fdvp;
+ a.a_fvp = fvp;
+ a.a_fcnp = fcnp;
+ a.a_tdvp = tdvp;
+ a.a_tvp = tvp;
+ a.a_tcnp = tcnp;
+ a.a_context = ctx;
+
+ /* do the rename of the main file. */
+ _err = (*fdvp->v_op[vnop_rename_desc.vdesc_offset])(&a);
+ DTRACE_FSINFO(rename, vnode_t, fdvp);
+
+ if (_err) {
+ return _err;
+ }
+
+ return post_rename(fdvp, fvp, tdvp, tvp);
+}
projects / apple / xnu.git / blobdiff