-This patch adds basic support for extended attributes. It works, but there
-are some things that still needs to be improved (see TODO list below).
+This patch adds backward-compatibility support for the --xattrs option.
+Since the main release has never had xattr support, the trunk doesn't
+need this code. If you want to make rsync 3.0.x communicate with an
+older (patched) release, use this.
To use this patch, run these commands for a successful build:
patch -p1 <patches/acls.diff
patch -p1 <patches/xattrs.diff
- ./prepare-source
- ./configure --enable-acl-support --enable-xattr-support
+ ./configure (optional if already run)
make
-Alternately, if you don't want ACL support, configure it this way:
-
- ./configure --enable-xattr-support
-
-TODO:
-
- - This patch needs to more efficiently handle large xattrs, especially when
- they're unchanged.
-
- - Extraneous xattr values need to be removed from files that are not being
- recreated.
-
- - We need to affect the itemized output to know when xattrs are being updated.
-
- - We need to affect the --link-dest option to avoid hard-linking two files
- that differ in their xattrs (when --xattrs was specified).
-
---- old/Makefile.in
-+++ new/Makefile.in
-@@ -28,13 +28,13 @@ VERSION=@VERSION@
-
- HEADERS=byteorder.h config.h errcode.h proto.h rsync.h smb_acls.h lib/pool_alloc.h
- LIBOBJ=lib/wildmatch.o lib/compat.o lib/snprintf.o lib/mdfour.o \
-- lib/permstring.o lib/pool_alloc.o lib/sysacls.o @LIBOBJS@
-+ lib/permstring.o lib/pool_alloc.o lib/sysacls.o lib/sysxattr.o @LIBOBJS@
- ZLIBOBJ=zlib/deflate.o zlib/inffast.o zlib/inflate.o zlib/inftrees.o \
- zlib/trees.o zlib/zutil.o zlib/adler32.o zlib/compress.o zlib/crc32.o
- OBJS1=flist.o rsync.o generator.o receiver.o cleanup.o sender.o exclude.o \
- util.o main.o checksum.o match.o syscall.o log.o backup.o
- OBJS2=options.o io.o compat.o hlink.o token.o uidlist.o socket.o \
-- fileio.o batch.o clientname.o chmod.o acls.o
-+ fileio.o batch.o clientname.o chmod.o acls.o xattr.o
- OBJS3=progress.o pipe.o
- DAEMON_OBJ = params.o loadparm.o clientserver.o access.o connection.o authenticate.o
- popt_OBJS=popt/findme.o popt/popt.o popt/poptconfig.o \
---- old/backup.c
-+++ new/backup.c
-@@ -24,6 +24,7 @@
- extern int verbose;
- extern int am_root;
- extern int preserve_acls;
-+extern int preserve_xattrs;
- extern int preserve_devices;
- extern int preserve_specials;
- extern int preserve_links;
-@@ -135,6 +136,9 @@ static int make_bak_dir(char *fullpath)
- #ifdef SUPPORT_ACLS
- sx.acc_acl = sx.def_acl = NULL;
- #endif
-+#ifdef SUPPORT_XATTRS
-+ sx.xattr = NULL;
-+#endif
- if (!(file = make_file(rel, NULL, NULL, 0, NO_FILTERS)))
- continue;
- #ifdef SUPPORT_ACLS
-@@ -143,6 +147,12 @@ static int make_bak_dir(char *fullpath)
- cache_acl(file, &sx);
- }
- #endif
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs) {
-+ get_xattr(rel, &sx);
-+ cache_xattr(file, &sx);
-+ }
-+#endif
- set_file_attrs(fullpath, file, NULL, 0);
- free(file);
- }
-@@ -194,6 +204,9 @@ static int keep_backup(const char *fname
- #ifdef SUPPORT_ACLS
- sx.acc_acl = sx.def_acl = NULL;
- #endif
-+#ifdef SUPPORT_XATTRS
-+ sx.xattr = NULL;
-+#endif
-
- if (!(file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
- return 1; /* the file could have disappeared */
-@@ -209,6 +222,12 @@ static int keep_backup(const char *fname
- cache_acl(file, &sx);
+diff --git a/compat.c b/compat.c
+--- a/compat.c
++++ b/compat.c
+@@ -187,13 +187,6 @@ void setup_protocol(int f_out,int f_in)
+ if (protocol_version < 30) {
+ if (append_mode == 1)
+ append_mode = 2;
+- if (preserve_xattrs && !local_server) {
+- rprintf(FERROR,
+- "--xattrs requires protocol 30 or higher"
+- " (negotiated %d).\n",
+- protocol_version);
+- exit_cleanup(RERR_PROTOCOL);
+- }
}
- #endif
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs) {
-+ get_xattr(fname, &sx);
-+ cache_xattr(file, &sx);
-+ }
-+#endif
-
- /* Check to see if this is a device file, or link */
- if ((am_root && preserve_devices && IS_DEVICE(file->mode))
---- old/compat.c
-+++ new/compat.c
-@@ -58,6 +58,8 @@ void setup_protocol(int f_out,int f_in)
- preserve_gid = ++file_extra_cnt;
- if (preserve_acls && !am_sender)
- preserve_acls = ++file_extra_cnt;
-+ if (preserve_xattrs && !am_sender)
-+ preserve_xattrs = ++file_extra_cnt;
-
- if (remote_protocol == 0) {
- if (!read_batch)
---- old/configure.in
-+++ new/configure.in
-@@ -883,6 +883,40 @@ samba_cv_HAVE_ACL_GET_PERM_NP=yes,samba_
- AC_MSG_RESULT(no)
- )
-
-+AC_CHECK_HEADERS(attr/xattr.h)
-+AC_CHECK_HEADERS(sys/xattr.h)
-+AC_CHECK_HEADERS(sys/extattr.h)
-+AC_MSG_CHECKING(whether to support extended attributes)
-+AC_ARG_ENABLE(xattr-support,
-+AC_HELP_STRING([--enable-xattr-support], [Include extended attribute support (default=no)]),
-+[ case "$enableval" in
-+ yes)
-+ case "$host_os" in
-+ *linux*)
-+ AC_MSG_RESULT(Using Linux xattrs)
-+ AC_DEFINE(HAVE_LINUX_XATTRS, 1, [True if you have Linux xattrs])
-+ ;;
-+ darwin*)
-+ AC_MSG_RESULT(Using OS X xattrs)
-+ AC_DEFINE(HAVE_OSX_XATTRS, 1, [True if you have Mac OS X xattrs])
-+ ;;
-+ freebsd*)
-+ AC_MSG_RESULT(Using FreeBSD extattrs)
-+ AC_DEFINE(HAVE_FREEBSD_XATTRS, 1, [True if you have FreeBSD xattrs])
-+ ;;
-+ *)
-+ AC_MSG_RESULT(Xattrs requested but not Linux or OS X. Good luck...)
-+ ;;
-+ esac
-+ ;;
-+ *)
-+ AC_MSG_RESULT(no)
-+ AC_DEFINE(HAVE_NO_XATTRS, 1, [True if you don't have extended attributes])
-+ esac ],
-+ AC_MSG_RESULT(no)
-+ AC_DEFINE(HAVE_NO_XATTRS, 1, [True if you don't have extended attributes])
-+)
-+
- AC_CONFIG_FILES([Makefile lib/dummy zlib/dummy popt/dummy shconfig])
- AC_OUTPUT
---- old/flist.c
-+++ new/flist.c
-@@ -43,6 +43,7 @@ extern int one_file_system;
- extern int copy_dirlinks;
- extern int keep_dirlinks;
- extern int preserve_acls;
-+extern int preserve_xattrs;
- extern int preserve_links;
- extern int preserve_hard_links;
- extern int preserve_devices;
-@@ -865,6 +866,10 @@ static struct file_struct *recv_file_ent
- if (preserve_acls)
- receive_acl(file, f);
- #endif
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs)
-+ receive_xattr(file, f );
-+#endif
-
- if (S_ISREG(mode) || S_ISLNK(mode))
- stats.total_size += file_length;
-@@ -1137,7 +1142,7 @@ static struct file_struct *send_file_nam
- int flags, int filter_flags)
+ if (delete_mode && !(delete_before+delete_during+delete_after)) {
+diff --git a/xattrs.c b/xattrs.c
+--- a/xattrs.c
++++ b/xattrs.c
+@@ -21,6 +21,7 @@
+
+ #include "rsync.h"
+ #include "ifuncs.h"
++#include "io.h"
+ #include "lib/sysxattrs.h"
+
+ #ifdef SUPPORT_XATTRS
+@@ -33,6 +34,7 @@ extern int read_only;
+ extern int list_only;
+ extern int preserve_xattrs;
+ extern int checksum_seed;
++extern int protocol_version;
+
+ #define RSYNC_XAL_INITIAL 5
+ #define RSYNC_XAL_LIST_INITIAL 100
+@@ -239,7 +241,7 @@ static int rsync_xal_get(const char *fname, item_list *xalp)
+ if (!(ptr = get_xattr_data(fname, name, &datum_len, 0)))
+ return -1;
+
+- if (datum_len > MAX_FULL_DATUM) {
++ if (datum_len > MAX_FULL_DATUM && protocol_version >= 30) {
+ /* For large datums, we store a flag and a checksum. */
+ name_offset = 1 + MAX_DIGEST_LEN;
+ sum_init(checksum_seed);
+@@ -307,7 +309,7 @@ static int find_matching_xattr(item_list *xalp)
+ || rxas1[j].datum_len != rxas2[j].datum_len
+ || strcmp(rxas1[j].name, rxas2[j].name))
+ break;
+- if (rxas1[j].datum_len > MAX_FULL_DATUM) {
++ if (rxas1[j].datum_len > MAX_FULL_DATUM && protocol_version >= 30) {
+ if (memcmp(rxas1[j].datum + 1,
+ rxas2[j].datum + 1,
+ MAX_DIGEST_LEN) != 0)
+@@ -344,34 +346,43 @@ int send_xattr(stat_x *sxp, int f)
{
- struct file_struct *file;
--#ifdef SUPPORT_ACLS
-+#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
- statx sx;
- #endif
-
-@@ -1156,6 +1161,13 @@ static struct file_struct *send_file_nam
- return NULL;
- }
- #endif
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs && f >= 0) {
-+ sx.xattr = NULL;
-+ if (get_xattr(fname, &sx) < 0)
-+ return NULL;
-+ }
-+#endif
-
- maybe_emit_filelist_progress(flist->count + flist_count_offset);
-
-@@ -1167,6 +1179,10 @@ static struct file_struct *send_file_nam
- if (preserve_acls)
- send_acl(&sx, f);
- #endif
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs)
-+ send_xattr(&sx, f);
-+#endif
- }
- return file;
- }
---- old/lib/sysxattr.c
-+++ new/lib/sysxattr.c
-@@ -0,0 +1,135 @@
-+/*
-+ * Extended attribute support for rsync.
-+ *
-+ * Copyright (C) 2004 Red Hat, Inc.
-+ * Written by Jay Fenlason.
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License along
-+ * with this program; if not, write to the Free Software Foundation, Inc.,
-+ * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
-+ */
-+
-+#include "rsync.h"
-+#include "sysxattr.h"
-+
-+#ifdef SUPPORT_XATTRS
-+
-+#if defined HAVE_LINUX_XATTRS
-+
-+ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size)
-+{
-+ return lgetxattr(path, name, value, size);
-+}
-+
-+ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
-+{
-+ return fgetxattr(filedes, name, value, size);
-+}
-+
-+int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size)
-+{
-+ return lsetxattr(path, name, value, size, 0);
-+}
-+
-+int sys_lremovexattr(const char *path, const char *name)
-+{
-+ return lremovexattr(path, name);
-+}
-+
-+ssize_t sys_llistxattr(const char *path, char *list, size_t size)
-+{
-+ return llistxattr(path, list, size);
-+}
-+
-+#elif HAVE_OSX_XATTRS
-+
-+ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size)
-+{
-+ return getxattr(path, name, value, size, 0, XATTR_NOFOLLOW);
-+}
-+
-+ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
-+{
-+ return fgetxattr(filedes, name, value, size, 0, 0);
-+}
-+
-+int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size)
-+{
-+ return setxattr(path, name, value, size, 0, XATTR_NOFOLLOW);
-+}
-+
-+int sys_lremovexattr(const char *path, const char *name)
-+{
-+ return removexattr(path, name, XATTR_NOFOLLOW);
-+}
-+
-+ssize_t sys_llistxattr(const char *path, char *list, size_t size)
-+{
-+ return listxattr(path, list, size, XATTR_NOFOLLOW);
-+}
-+
-+#elif HAVE_FREEBSD_XATTRS
-+
-+ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size)
-+{
-+ return extattr_get_link(path, EXTATTR_NAMESPACE_USER, name, value, size);
-+}
-+
-+ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
-+{
-+ return extattr_get_fd(filedes, EXTATTR_NAMESPACE_USER, name, value, size);
-+}
-+
-+int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size)
-+{
-+ return extattr_set_link(path, EXTATTR_NAMESPACE_USER, name, value, size);
-+}
-+
-+int sys_lremovexattr(const char *path, const char *name)
-+{
-+ return extattr_delete_link(path, EXTATTR_NAMESPACE_USER, name);
-+}
-+
-+ssize_t sys_llistxattr(const char *path, char *list, size_t size)
-+{
-+ unsigned char keylen;
-+ ssize_t off, len = extattr_list_link(path, EXTATTR_NAMESPACE_USER, list, size);
-+
-+ if (len <= 0 || (size_t)len > size)
-+ return len;
-+
-+ /* FreeBSD puts a single-byte length before each string, with no '\0'
-+ * terminator. We need to change this into a series of null-terminted
-+ * strings. Since the size is the same, we can simply transform the
-+ * output in place. */
-+ for (off = 0; off < len; off += keylen + 1) {
-+ keylen = ((unsigned char*)list)[off];
-+ if (off + keylen >= len) {
-+ /* Should be impossible, but kernel bugs happen! */
-+ errno = EINVAL;
-+ return -1;
+ int ndx = find_matching_xattr(sxp->xattr);
+
+- /* Send 0 (-1 + 1) to indicate that literal xattr data follows. */
+- write_varint(f, ndx + 1);
++ if (protocol_version < 30) {
++ if (ndx < 0)
++ write_byte(f, 'X');
++ else {
++ write_byte(f, 'x');
++ write_int(f, ndx);
+ }
-+ memmove(list+off, list+off+1, keylen);
-+ list[off+keylen] = '\0';
++ } else {
++ /* Send 0 (-1 + 1) to indicate that literal xattr data follows. */
++ write_varint(f, ndx + 1);
+ }
-+
-+ return len;
-+}
-+
-+#else
-+
-+#error You need to create xattr compatibility functions.
-+
-+#endif
-+
-+#endif /* SUPPORT_XATTRS */
---- old/lib/sysxattr.h
-+++ new/lib/sysxattr.h
-@@ -0,0 +1,26 @@
-+#ifdef SUPPORT_XATTRS
-+
-+#if defined HAVE_ATTR_XATTR_H
-+#include <attr/xattr.h>
-+#elif defined HAVE_SYS_XATTR_H
-+#include <sys/xattr.h>
-+#elif defined HAVE_SYS_EXTATTR_H
-+#include <sys/extattr.h>
-+#endif
-+
-+/* Linux 2.4 does not define this as a distinct errno value: */
-+#ifndef ENOATTR
-+#define ENOATTR ENODATA
-+#endif
-+
-+ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size);
-+ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size);
-+int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size);
-+int sys_lremovexattr(const char *path, const char *name);
-+ssize_t sys_llistxattr(const char *path, char *list, size_t size);
-+
-+#else
-+
-+/* No xattrs available */
-+
-+#endif
---- old/options.c
-+++ new/options.c
-@@ -48,6 +48,7 @@ int copy_links = 0;
- int preserve_links = 0;
- int preserve_hard_links = 0;
- int preserve_acls = 0;
-+int preserve_xattrs = 0;
- int preserve_perms = 0;
- int preserve_executability = 0;
- int preserve_devices = 0;
-@@ -201,6 +202,7 @@ static void print_rsync_version(enum log
- char const *have_inplace = "no ";
- char const *hardlinks = "no ";
- char const *acls = "no ";
-+ char const *xattrs = "no ";
- char const *links = "no ";
- char const *ipv6 = "no ";
- STRUCT_STAT *dumstat;
-@@ -220,7 +222,9 @@ static void print_rsync_version(enum log
- #ifdef SUPPORT_ACLS
- acls = "";
- #endif
--
-+#ifdef SUPPORT_XATTRS
-+ xattrs = "";
-+#endif
- #ifdef SUPPORT_LINKS
- links = "";
- #endif
-@@ -239,8 +243,8 @@ static void print_rsync_version(enum log
- (int)(sizeof (int64) * 8));
- rprintf(f, " %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
- got_socketpair, hardlinks, links, ipv6, have_inplace);
-- rprintf(f, " %sappend, %sACLs\n",
-- have_inplace, acls);
-+ rprintf(f, " %sappend, %sACLs, %sxattrs\n",
-+ have_inplace, acls, xattrs);
- #ifdef MAINTAINER_MODE
- rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
-@@ -286,7 +290,7 @@ void usage(enum logcode F)
- rprintf(F," -q, --quiet suppress non-error messages\n");
- rprintf(F," --no-motd suppress daemon-mode MOTD (see manpage caveat)\n");
- rprintf(F," -c, --checksum skip based on checksum, not mod-time & size\n");
-- rprintf(F," -a, --archive archive mode; same as -rlptgoD (no -H, -A)\n");
-+ rprintf(F," -a, --archive archive mode; equals -rlptgoD (no -H,-A,-X)\n");
- rprintf(F," --no-OPTION turn off an implied OPTION (e.g. --no-D)\n");
- rprintf(F," -r, --recursive recurse into directories\n");
- rprintf(F," -R, --relative use relative path names\n");
-@@ -311,6 +315,9 @@ void usage(enum logcode F)
- #ifdef SUPPORT_ACLS
- rprintf(F," -A, --acls preserve ACLs (implies --perms)\n");
- #endif
-+#ifdef SUPPORT_XATTRS
-+ rprintf(F," -X, --xattrs preserve extended attributes (implies --perms)\n");
-+#endif
- rprintf(F," -o, --owner preserve owner (super-user only)\n");
- rprintf(F," -g, --group preserve group\n");
- rprintf(F," --devices preserve device files (super-user only)\n");
-@@ -434,6 +441,9 @@ static struct poptOption long_options[]
- {"acls", 'A', POPT_ARG_NONE, 0, 'A', 0, 0 },
- {"no-acls", 0, POPT_ARG_VAL, &preserve_acls, 0, 0, 0 },
- {"no-A", 0, POPT_ARG_VAL, &preserve_acls, 0, 0, 0 },
-+ {"xattrs", 'X', POPT_ARG_NONE, 0, 'X', 0, 0 },
-+ {"no-xattrs", 0, POPT_ARG_VAL, &preserve_xattrs, 0, 0, 0 },
-+ {"no-X", 0, POPT_ARG_VAL, &preserve_xattrs, 0, 0, 0 },
- {"times", 't', POPT_ARG_VAL, &preserve_times, 1, 0, 0 },
- {"no-times", 0, POPT_ARG_VAL, &preserve_times, 0, 0, 0 },
- {"no-t", 0, POPT_ARG_VAL, &preserve_times, 0, 0, 0 },
-@@ -1122,6 +1132,17 @@ int parse_arguments(int *argc, const cha
- return 0;
- #endif
-
-+ case 'X':
-+#ifdef SUPPORT_XATTRS
-+ preserve_xattrs = 1;
-+ preserve_perms = 1;
-+ break;
-+#else
-+ snprintf(err_buf,sizeof(err_buf),
-+ "extended attributes are not supported on this %s\n",
-+ am_server ? "server" : "client");
-+ return 0;
-+#endif
-
- default:
- /* A large opt value means that set_refuse_options()
-@@ -1590,6 +1611,10 @@ void server_options(char **args,int *arg
- if (preserve_acls)
- argstr[x++] = 'A';
- #endif
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs)
-+ argstr[x++] = 'X';
-+#endif
- if (recurse)
- argstr[x++] = 'r';
- if (always_checksum)
---- old/rsync.c
-+++ new/rsync.c
-@@ -33,6 +33,7 @@
- extern int verbose;
- extern int dry_run;
- extern int preserve_acls;
-+extern int preserve_xattrs;
- extern int preserve_perms;
- extern int preserve_executability;
- extern int preserve_times;
-@@ -321,6 +322,10 @@ int set_file_attrs(char *fname, struct f
- if (daemon_chmod_modes && !S_ISLNK(new_mode))
- new_mode = tweak_mode(new_mode, daemon_chmod_modes);
-
-+#ifdef SUPPORT_XATTRS
-+ if (preserve_xattrs && set_xattr(fname, file, sxp) == 0)
-+ updated = 1;
-+#endif
- #ifdef SUPPORT_ACLS
- /* It's OK to call set_acl() now, even for a dir, as the generator
- * will enable owner-writability using chmod, if necessary.
---- old/rsync.h
-+++ new/rsync.h
-@@ -554,6 +554,10 @@ struct idev_node {
- #define ACLS_NEED_MASK 1
+ if (ndx < 0) {
+ rsync_xa *rxa;
+ int count = sxp->xattr->count;
+- write_varint(f, count);
++ write_varint30(f, count);
+ for (rxa = sxp->xattr->items; count--; rxa++) {
+ #ifdef HAVE_LINUX_XATTRS
+- write_varint(f, rxa->name_len);
+- write_varint(f, rxa->datum_len);
++ write_varint30(f, rxa->name_len);
++ write_varint30(f, rxa->datum_len);
+ write_buf(f, rxa->name, rxa->name_len);
+ #else
+ /* We strip the rsync prefix from disguised namespaces
+ * and put everything else in the user namespace. */
+ if (HAS_PREFIX(rxa->name, RSYNC_PREFIX)
+ && rxa->name[RPRE_LEN] != '%') {
+- write_varint(f, rxa->name_len - RPRE_LEN);
+- write_varint(f, rxa->datum_len);
++ write_varint30(f, rxa->name_len - RPRE_LEN);
++ write_varint30(f, rxa->datum_len);
+ write_buf(f, rxa->name + RPRE_LEN, rxa->name_len - RPRE_LEN);
+ } else {
+- write_varint(f, rxa->name_len + UPRE_LEN);
+- write_varint(f, rxa->datum_len);
++ write_varint30(f, rxa->name_len + UPRE_LEN);
++ write_varint30(f, rxa->datum_len);
+ write_buf(f, USER_PREFIX, UPRE_LEN);
+ write_buf(f, rxa->name, rxa->name_len);
+ }
#endif
-
-+#ifndef HAVE_NO_XATTRS
-+#define SUPPORT_XATTRS 1
-+#endif
+- if (rxa->datum_len > MAX_FULL_DATUM)
++ if (rxa->datum_len > MAX_FULL_DATUM && protocol_version >= 30)
+ write_buf(f, rxa->datum + 1, MAX_DIGEST_LEN);
+ else
+ write_buf(f, rxa->datum, rxa->datum_len);
+@@ -421,7 +432,7 @@ int xattr_diff(struct file_struct *file, stat_x *sxp, int find_all)
+ cmp = rec_cnt ? strcmp(snd_rxa->name, rec_rxa->name) : -1;
+ if (cmp > 0)
+ same = 0;
+- else if (snd_rxa->datum_len > MAX_FULL_DATUM) {
++ else if (snd_rxa->datum_len > MAX_FULL_DATUM && protocol_version >= 30) {
+ same = cmp == 0 && snd_rxa->datum_len == rec_rxa->datum_len
+ && memcmp(snd_rxa->datum + 1, rec_rxa->datum + 1,
+ MAX_DIGEST_LEN) == 0;
+@@ -464,6 +475,9 @@ void send_xattr_request(const char *fname, struct file_struct *file, int f_out)
+ int cnt, prior_req = 0;
+ rsync_xa *rxa;
+
++ if (protocol_version < 30)
++ return;
+
- #define GID_NONE ((gid_t)-1)
+ lst += F_XATTR(file);
+ for (rxa = lst->items, cnt = lst->count; cnt--; rxa++) {
+ if (rxa->datum_len <= MAX_FULL_DATUM)
+@@ -518,6 +532,9 @@ int recv_xattr_request(struct file_struct *file, int f_in)
+ rsync_xa *rxa;
+ int rel_pos, cnt, num, got_xattr_data = 0;
- union file_extras {
-@@ -574,6 +578,7 @@ extern int file_extra_cnt;
- extern int preserve_uid;
- extern int preserve_gid;
- extern int preserve_acls;
-+extern int preserve_xattrs;
-
- #define FILE_STRUCT_LEN (offsetof(struct file_struct, basename))
- #define EXTRA_LEN (sizeof (union file_extras))
-@@ -607,6 +612,7 @@ extern int preserve_acls;
- #define F_OWNER(f) REQ_EXTRA(f, preserve_uid)->unum
- #define F_GROUP(f) REQ_EXTRA(f, preserve_gid)->unum
- #define F_ACL(f) REQ_EXTRA(f, preserve_acls)->unum
-+#define F_XATTR(f) REQ_EXTRA(f, preserve_xattrs)->unum
-
- /* These items are per-entry optional and mutally exclusive: */
- #define F_HL_GNUM(f) OPT_EXTRA(f, LEN64_BUMP(f))->num
-@@ -798,6 +804,9 @@ typedef struct {
- struct rsync_acl *acc_acl; /* access ACL */
- struct rsync_acl *def_acl; /* default ACL */
- #endif
-+#ifdef SUPPORT_XATTRS
-+ item_list *xattr;
-+#endif
- } statx;
-
- #define ACL_READY(sx) ((sx).acc_acl != NULL)
---- old/rsync.yo
-+++ new/rsync.yo
-@@ -301,7 +301,7 @@ to the detailed description below for a
- -q, --quiet suppress non-error messages
- --no-motd suppress daemon-mode MOTD (see caveat)
- -c, --checksum skip based on checksum, not mod-time & size
-- -a, --archive archive mode; same as -rlptgoD (no -H, -A)
-+ -a, --archive archive mode; equals -rlptgoD (no -H,-A,-X)
- --no-OPTION turn off an implied OPTION (e.g. --no-D)
- -r, --recursive recurse into directories
- -R, --relative use relative path names
-@@ -324,6 +324,7 @@ to the detailed description below for a
- -E, --executability preserve executability
- --chmod=CHMOD affect file and/or directory permissions
- -A, --acls preserve ACLs (implies -p) [non-standard]
-+ -X, --xattrs preserve extended attrs (implies -p) [n.s.]
- -o, --owner preserve owner (super-user only)
- -g, --group preserve group
- --devices preserve device files (super-user only)
-@@ -835,6 +836,11 @@ The ACL-sending protocol used by this ve
- the patch that was shipped with 2.6.8. Sending ACLs to an older version
- of the ACL patch is not supported.
-
-+dit(bf(-X, --xattrs)) This option causes rsync to update the remote
-+extended attributes to be the same as the local ones. This will work
-+only if the remote machine's rsync supports this option also. This is
-+a non-standard option.
-+
- dit(bf(--chmod)) This option tells rsync to apply one or more
- comma-separated "chmod" strings to the permission of the files in the
- transfer. The resulting value is treated as though it was the permissions
---- old/xattr.c
-+++ new/xattr.c
-@@ -0,0 +1,413 @@
-+/*
-+ * Extended Attribute support for rsync.
-+ * Written by Jay Fenlason, vaguely based on the ACLs patch.
-+ *
-+ * Copyright (C) 2004 Red Hat, Inc.
-+ * Copyright (C) 2006 Wayne Davison
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License along
-+ * with this program; if not, write to the Free Software Foundation, Inc.,
-+ * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
-+ */
-+
-+#include "rsync.h"
-+#include "lib/sysxattr.h"
-+
-+#ifdef SUPPORT_XATTRS
-+
-+extern int dry_run;
-+extern int am_root;
-+extern int read_only;
-+extern int list_only;
-+
-+#define RSYNC_XAL_INITIAL 5
-+#define RSYNC_XAL_LIST_INITIAL 100
-+
-+#define HAS_PREFIX(str, prfx) (*(str) == *(prfx) \
-+ && strncmp(str, prfx, sizeof (prfx) - 1) == 0)
-+
-+#define USER_PREFIX "user."
-+#define UPRE_LEN ((int)sizeof USER_PREFIX - 1)
-+#define SYSTEM_PREFIX "system."
-+#define SPRE_LEN ((int)sizeof SYSTEM_PREFIX - 1)
-+
-+#ifdef HAVE_LINUX_XATTRS
-+#define RPRE_LEN 0
-+#else
-+#define RSYNC_PREFIX "rsync."
-+#define RPRE_LEN ((int)sizeof RSYNC_PREFIX - 1)
-+#endif
-+
-+typedef struct {
-+ char *datum, *name;
-+ size_t datum_len, name_len;
-+} rsync_xa;
-+
-+static size_t namebuf_len = 0;
-+static char *namebuf = NULL;
-+
-+static item_list empty_xattr = EMPTY_ITEM_LIST;
-+static item_list rsync_xal_l = EMPTY_ITEM_LIST;
-+
-+/* ------------------------------------------------------------------------- */
-+
-+static void rsync_xal_free(item_list *xalp)
-+{
-+ size_t i;
-+ rsync_xa *rxas = xalp->items;
-+
-+ for (i = 0; i < xalp->count; i++) {
-+ free(rxas[i].datum);
-+ /*free(rxas[i].name);*/
-+ }
-+ xalp->count = 0;
-+}
-+
-+void free_xattr(statx *sxp)
-+{
-+ rsync_xal_free(sxp->xattr);
-+ free(sxp->xattr);
-+ sxp->xattr = NULL;
-+}
-+
-+static int rsync_xal_compare_names(const void *x1, const void *x2)
-+{
-+ const rsync_xa *xa1 = x1;
-+ const rsync_xa *xa2 = x2;
-+ return strcmp(xa1->name, xa2->name);
-+}
-+
-+static int rsync_xal_get(const char *fname, item_list *xalp)
-+{
-+ ssize_t list_len, name_len, datum_len;
-+ char *name, *ptr;
-+
-+ if (!namebuf) {
-+ namebuf_len = 1024;
-+ namebuf = new_array(char, namebuf_len);
-+ if (!namebuf)
-+ out_of_memory("rsync_xal_get");
-+ }
-+
-+ /* The length returned includes all the '\0' terminators. */
-+ list_len = sys_llistxattr(fname, namebuf, namebuf_len);
-+ if (list_len > (ssize_t)namebuf_len) {
-+ list_len = -1;
-+ errno = ERANGE;
-+ }
-+ if (list_len < 0) {
-+ if (errno == ENOTSUP)
-+ return 0;
-+ if (errno == ERANGE) {
-+ list_len = sys_llistxattr(fname, NULL, 0);
-+ if (list_len < 0) {
-+ rsyserr(FERROR, errno,
-+ "rsync_xal_get: llistxattr(\"%s\",0) failed",
-+ fname);
-+ return -1;
-+ }
-+ namebuf = realloc_array(namebuf, char, list_len + 1024);
-+ if (!namebuf)
-+ out_of_memory("rsync_xal_get");
-+ namebuf_len = list_len + 1024;
-+ list_len = sys_llistxattr(fname, namebuf, namebuf_len);
-+ if (list_len < 0) {
-+ rsyserr(FERROR, errno,
-+ "rsync_xal_get: llistxattr(\"%s\",%ld) failed",
-+ fname, (long)namebuf_len);
-+ return -1;
-+ }
-+ } else {
-+ rsyserr(FERROR, errno,
-+ "rsync_xal_get: llistxattr(\"%s\",%ld) failed",
-+ fname, (long)namebuf_len);
-+ return -1;
-+ }
-+ }
-+
-+ for (name = namebuf; list_len > 0; name += name_len) {
-+ rsync_xa *rxas;
-+
-+ name_len = strlen(name) + 1;
-+ list_len -= name_len;
-+
-+#ifdef HAVE_LINUX_XATTRS
-+ /* We don't send the system namespace. */
-+ if (HAS_PREFIX(name, SYSTEM_PREFIX))
-+ continue;
-+#endif
-+
-+ datum_len = sys_lgetxattr(fname, name, NULL, 0);
-+ if (datum_len < 0) {
-+ if (errno == ENOTSUP)
-+ return -1;
-+ rsyserr(FERROR, errno,
-+ "rsync_xal_get: lgetxattr(\"%s\",\"%s\",0) failed",
-+ fname, name);
-+ return -1;
-+ }
-+ ptr = new_array(char, name_len + datum_len);
-+ if (!ptr)
-+ out_of_memory("rsync_xal_get");
-+ if (datum_len) {
-+ ssize_t len = sys_lgetxattr(fname, name, ptr, datum_len);
-+ if (len != datum_len) {
-+ if (len < 0) {
-+ rsyserr(FERROR, errno,
-+ "rsync_xal_get: lgetxattr(\"%s\",\"%s\",%ld)"
-+ " failed", fname, name, (long)datum_len);
-+ } else {
-+ rprintf(FERROR,
-+ "rsync_xal_get: lgetxattr(\"%s\",\"%s\",%ld)"
-+ " returned %ld\n", fname, name,
-+ (long)datum_len, (long)len);
-+ }
-+ free(ptr);
-+ return -1;
-+ }
-+ }
-+ rxas = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL);
-+ rxas->name = ptr + datum_len;
-+ rxas->datum = ptr;
-+ rxas->name_len = name_len;
-+ rxas->datum_len = datum_len;
-+ memcpy(rxas->name, name, name_len);
-+ }
-+ if (xalp->count > 1)
-+ qsort(xalp->items, xalp->count, sizeof (rsync_xa), rsync_xal_compare_names);
-+ return 0;
-+}
-+
-+/* Read the xattr(s) for this filename. */
-+int get_xattr(const char *fname, statx *sxp)
-+{
-+ sxp->xattr = new(item_list);
-+ *sxp->xattr = empty_xattr;
-+ if (rsync_xal_get(fname, sxp->xattr) < 0) {
-+ free_xattr(sxp);
-+ return -1;
-+ }
-+ return 0;
-+}
++ if (protocol_version < 30)
++ return 0;
+
-+static int find_matching_xattr(item_list *xalp)
-+{
-+ size_t i, j;
-+ item_list *lst = rsync_xal_l.items;
-+
-+ for (i = 0; i < rsync_xal_l.count; i++) {
-+ rsync_xa *rxas1 = lst[i].items;
-+ rsync_xa *rxas2 = xalp->items;
-+
-+ /* Wrong number of elements? */
-+ if (lst[i].count != xalp->count)
-+ continue;
-+ /* any elements different? */
-+ for (j = 0; j < xalp->count; j++) {
-+ if (rxas1[j].name_len != rxas2[j].name_len
-+ || rxas1[j].datum_len != rxas2[j].datum_len
-+ || strcmp(rxas1[j].name, rxas2[j].name)
-+ || memcmp(rxas1[j].datum, rxas2[j].datum, rxas2[j].datum_len))
-+ break;
-+ }
-+ /* no differences found. This is The One! */
-+ if (j == xalp->count)
-+ return i;
-+ }
-+
-+ return -1;
-+}
-+
-+/* Store *xalp on the end of rsync_xal_l */
-+static void rsync_xal_store(item_list *xalp)
-+{
-+ item_list *new_lst = EXPAND_ITEM_LIST(&rsync_xal_l, item_list, RSYNC_XAL_LIST_INITIAL);
-+ /* Since the following call starts a new list, we know it will hold the
-+ * entire initial-count, not just enough space for one new item. */
-+ *new_lst = empty_xattr;
-+ (void)EXPAND_ITEM_LIST(new_lst, rsync_xa, xalp->count);
-+ memcpy(new_lst->items, xalp->items, xalp->count * sizeof (rsync_xa));
-+ new_lst->count = xalp->count;
-+ xalp->count = 0;
-+}
-+
-+/* Send the make_xattr()-generated xattr list for this flist entry. */
-+void send_xattr(statx *sxp, int f)
-+{
-+ int ndx = find_matching_xattr(sxp->xattr);
-+ if (ndx != -1) {
-+ write_byte(f, 'x');
-+ write_int(f, ndx);
-+ rsync_xal_free(sxp->xattr);
-+ } else {
-+ rsync_xa *rxa;
-+ int count = sxp->xattr->count;
-+ write_byte(f, 'X');
-+ write_int(f, count);
-+ for (rxa = sxp->xattr->items; count--; rxa++) {
-+#ifdef HAVE_LINUX_XATTRS
-+ write_int(f, rxa->name_len);
-+ write_int(f, rxa->datum_len);
-+ write_buf(f, rxa->name, rxa->name_len);
-+#else
-+ /* We strip the rsync prefix from disguised namespaces
-+ * and put everything else in the user namespace. */
-+ if (HAS_PREFIX(rxa->name, RSYNC_PREFIX)
-+ && rxa->name[RPRE_LEN] != '%') {
-+ write_int(f, rxa->name_len - RPRE_LEN);
-+ write_int(f, rxa->datum_len);
-+ write_buf(f, rxa->name + RPRE_LEN, rxa->name_len - RPRE_LEN);
-+ } else {
-+ write_int(f, rxa->name_len + UPRE_LEN);
-+ write_int(f, rxa->datum_len);
-+ write_buf(f, USER_PREFIX, UPRE_LEN);
-+ write_buf(f, rxa->name, rxa->name_len);
-+ }
-+#endif
-+ write_buf(f, rxa->datum, rxa->datum_len);
-+ }
-+ rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */
-+ }
-+ free_xattr(sxp);
-+}
-+
-+/* ------------------------------------------------------------------------- */
-+
-+/* receive and build the rsync_xattr_lists */
-+void receive_xattr(struct file_struct *file, int f)
-+{
-+ static item_list temp_xattr = EMPTY_ITEM_LIST;
-+ int ndx, tag = read_byte(f);
-+
-+ if (tag == 'X') {
-+ int i, count = read_int(f);
-+ for (i = 0; i < count; i++) {
-+ char *ptr, *name;
-+ rsync_xa *rxa;
-+ size_t name_len = read_int(f);
-+ size_t datum_len = read_int(f);
-+#ifdef HAVE_LINUX_XATTRS
-+ size_t extra_len = 0;
-+#else
-+ size_t extra_len = am_root ? RPRE_LEN : 0;
-+ if (datum_len + extra_len < datum_len)
-+ out_of_memory("receive_xattr"); /* overflow */
-+#endif
-+ if (name_len + datum_len + extra_len < name_len)
-+ out_of_memory("receive_xattr"); /* overflow */
-+ ptr = new_array(char, name_len + datum_len + extra_len);
-+ if (!ptr)
-+ out_of_memory("receive_xattr");
-+ name = ptr + datum_len + extra_len;
-+ read_buf(f, name, name_len);
-+ read_buf(f, ptr, datum_len);
-+#ifdef HAVE_LINUX_XATTRS
-+ /* Non-root can only save the user namespace. */
-+ if (!am_root && !HAS_PREFIX(name, USER_PREFIX)) {
-+ free(ptr);
-+ continue;
-+ }
-+#else
-+ /* This OS only has a user namespace, so we either
-+ * strip the user prefix, or we put a non-user
-+ * namespace inside our rsync hierarchy. */
-+ if (HAS_PREFIX(name, USER_PREFIX)) {
-+ name += UPRE_LEN;
-+ name_len -= UPRE_LEN;
-+ } else if (am_root) {
-+ name -= RPRE_LEN;
-+ name_len += RPRE_LEN;
-+ memcpy(name, RSYNC_PREFIX, RPRE_LEN);
-+ } else {
-+ free(ptr);
-+ continue;
-+ }
-+#endif
-+ rxa = EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count);
-+ rxa->name = name;
-+ rxa->datum = ptr;
-+ rxa->name_len = name_len;
-+ rxa->datum_len = datum_len;
-+ }
-+ ndx = rsync_xal_l.count; /* pre-incremented count */
-+ rsync_xal_store(&temp_xattr); /* adds item to rsync_xal_l */
-+ } else if (tag == 'x') {
-+ ndx = read_int(f);
-+ if (ndx < 0 || (size_t)ndx >= rsync_xal_l.count) {
-+ rprintf(FERROR, "receive_xattr: xa index %d out of"
-+ " range for %s\n", ndx, f_name(file, NULL));
-+ exit_cleanup(RERR_STREAMIO);
-+ }
-+ } else {
-+ rprintf(FERROR, "receive_xattr: unknown extended attribute"
-+ " type tag (%c) for %s\n", tag, f_name(file, NULL));
-+ exit_cleanup(RERR_STREAMIO);
-+ }
-+
-+ F_XATTR(file) = ndx;
-+}
-+
-+/* Turn the xattr data in statx into cached xattr data, setting the index
-+ * values in the file struct. */
-+void cache_xattr(struct file_struct *file, statx *sxp)
-+{
+ if (F_XATTR(file) < 0) {
+ rprintf(FERROR, "recv_xattr_request: internal data error!\n");
+ exit_cleanup(RERR_STREAMIO);
+@@ -574,7 +591,22 @@ void receive_xattr(struct file_struct *file, int f)
+ {
+ static item_list temp_xattr = EMPTY_ITEM_LIST;
+ int count, num;
+- int ndx = read_varint(f);
+ int ndx;
+
-+ if (!sxp->xattr)
-+ return;
-+
-+ ndx = find_matching_xattr(sxp->xattr);
-+ if (ndx == -1)
-+ rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */
-+ free_xattr(sxp);
-+
-+ F_XATTR(file) = ndx;
-+}
-+
-+static int rsync_xal_set(const char *fname, item_list *xalp)
-+{
-+ rsync_xa *rxas = xalp->items;
-+ size_t i;
-+ int ret = 0;
-+
-+ for (i = 0; i < xalp->count; i++) {
-+ int status = sys_lsetxattr(fname, rxas[i].name, rxas[i].datum, rxas[i].datum_len);
-+ if (status < 0) {
-+ rsyserr(FERROR, errno,
-+ "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed",
-+ fname, rxas[i].name);
-+ ret = -1;
++ if (protocol_version >= 30)
++ ndx = read_varint(f);
++ else {
++ int tag = read_byte(f);
++ if (tag == 'x')
++ ndx = read_int(f) + 1;
++ else if (tag == 'X')
++ ndx = 0;
++ else {
++ rprintf(FERROR, "receive_xattr: unknown extended attribute"
++ " type tag (%02x) for %s\n", tag, f_name(file, NULL));
++ exit_cleanup(RERR_STREAMIO);
+ }
+ }
-+ return ret;
-+}
-+
-+/* Set extended attributes on indicated filename. */
-+int set_xattr(const char *fname, const struct file_struct *file, UNUSED(statx *sxp))
-+{
-+ int ndx;
-+ item_list *lst = rsync_xal_l.items;
-+
-+ if (dry_run)
-+ return 1; /* FIXME: --dry-run needs to compute this value */
-+
-+ if (read_only || list_only) {
-+ errno = EROFS;
-+ return -1;
-+ }
-+
-+ ndx = F_XATTR(file);
-+ return rsync_xal_set(fname, lst + ndx); /* TODO: This needs to return 1 if no xattrs changed! */
-+}
-+
-+#endif /* SUPPORT_XATTRS */
+
+ if (ndx < 0 || (size_t)ndx > rsync_xal_l.count) {
+ rprintf(FERROR, "receive_xattr: xa index %d out of"
+@@ -587,7 +619,7 @@ void receive_xattr(struct file_struct *file, int f)
+ return;
+ }
+
+- if ((count = read_varint(f)) != 0) {
++ if ((count = read_varint30(f)) != 0) {
+ (void)EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count);
+ temp_xattr.count = 0;
+ }
+@@ -595,9 +627,10 @@ void receive_xattr(struct file_struct *file, int f)
+ for (num = 1; num <= count; num++) {
+ char *ptr, *name;
+ rsync_xa *rxa;
+- size_t name_len = read_varint(f);
+- size_t datum_len = read_varint(f);
+- size_t dget_len = datum_len > MAX_FULL_DATUM ? 1 + MAX_DIGEST_LEN : datum_len;
++ size_t name_len = read_varint30(f);
++ size_t datum_len = read_varint30(f);
++ size_t dget_len = datum_len > MAX_FULL_DATUM && protocol_version >= 30
++ ? 1 + MAX_DIGEST_LEN : datum_len;
+ size_t extra_len = MIGHT_NEED_RPRE ? RPRE_LEN : 0;
+ if (dget_len + extra_len < dget_len)
+ out_of_memory("receive_xattr"); /* overflow */
git.samba.org / rsync-patches.git / blobdiff