X-Git-Url: https://mattmccutchen.net/rsync/rsync-patches.git/blobdiff_plain/7c15d5aa2fa65886f0130e5350cd2021283b5fda..refs/heads/master:/xattrs.diff diff --git a/xattrs.diff b/xattrs.diff index ff1d1da..422f4e3 100644 --- a/xattrs.diff +++ b/xattrs.diff @@ -1,975 +1,189 @@ -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 mode)) ---- old/configure.in -+++ new/configure.in -@@ -878,6 +878,40 @@ 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 -@@ -41,6 +41,7 @@ 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; -@@ -800,6 +801,10 @@ 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 - return file; - } -@@ -1061,7 +1066,7 @@ static struct file_struct *send_file_nam - unsigned short flags) + if (delete_mode && !(delete_before+delete_during+delete_after)) { +diff --git a/xattrs.c b/xattrs.c +--- a/xattrs.c ++++ b/xattrs.c +@@ -22,6 +22,7 @@ + #include "rsync.h" + #include "ifuncs.h" + #include "inums.h" ++#include "io.h" + #include "lib/sysxattrs.h" + + #ifdef SUPPORT_XATTRS +@@ -34,6 +35,7 @@ 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 +@@ -249,7 +251,7 @@ 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); +@@ -365,7 +367,7 @@ 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) +@@ -402,13 +404,22 @@ int send_xattr(int f, stat_x *sxp) { - struct file_struct *file; --#ifdef SUPPORT_ACLS -+#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS - statx sx; - #endif - -@@ -1081,6 +1086,13 @@ 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); - -@@ -1092,6 +1104,10 @@ 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 -+#elif defined HAVE_SYS_XATTR_H -+#include -+#elif defined HAVE_SYS_EXTATTR_H -+#include -+#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 }, -@@ -1116,6 +1126,17 @@ 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() -@@ -1255,6 +1276,8 @@ int parse_arguments(int *argc, const cha - preserve_gid = ++flist_extra_cnt; - if (preserve_acls) - preserve_acls = ++flist_extra_cnt; -+ if (preserve_xattrs) -+ preserve_xattrs = ++flist_extra_cnt; - - *argv = poptGetArgs(pc); - *argc = count_args(*argv); -@@ -1570,6 +1593,10 @@ void server_options(char **args,int *arg - if (preserve_acls) - argstr[x++] = 'A'; + 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++) { + size_t name_len = rxa->name_len; + const char *name = rxa->name; +@@ -427,8 +438,8 @@ int send_xattr(int f, stat_x *sxp) + name_len += UPRE_LEN; + } #endif -+#ifdef SUPPORT_XATTRS -+ if (preserve_xattrs) -+ argstr[x++] = 'X'; -+#endif - if (preserve_uid) - argstr[x++] = 'o'; - if (preserve_gid) ---- 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; -@@ -271,6 +272,10 @@ 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 -@@ -516,6 +516,10 @@ struct idev_node { - #define ACLS_NEED_MASK 1 +- write_varint(f, name_len); +- write_varint(f, rxa->datum_len); ++ write_varint30(f, name_len); ++ write_varint30(f, rxa->datum_len); + #ifndef HAVE_LINUX_XATTRS + if (name_len > rxa->name_len) { + write_buf(f, USER_PREFIX, UPRE_LEN); +@@ -436,7 +447,7 @@ int send_xattr(int f, stat_x *sxp) + } #endif - -+#ifndef HAVE_NO_XATTRS -+#define SUPPORT_XATTRS 1 -+#endif + write_buf(f, name, name_len); +- 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); +@@ -486,7 +497,7 @@ 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; +@@ -531,6 +542,9 @@ 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) - - struct file_struct { -@@ -568,6 +572,7 @@ extern int preserve_gid; - #define F_UID(f) REQ_EXTRA(f, preserve_uid)->uid - #define F_GID(f) REQ_EXTRA(f, preserve_gid)->gid - #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_IDEV(f) OPT_EXTRA(f, LEN64_BUMP(f))->idev -@@ -744,6 +749,9 @@ typedef struct { - struct rsync_acl *acc_acl; /* access ACL */ - struct rsync_acl *def_acl; /* default ACL */ + lst += F_XATTR(file); + for (rxa = lst->items, cnt = lst->count; cnt--; rxa++) { + if (rxa->datum_len <= MAX_FULL_DATUM) +@@ -587,6 +601,9 @@ int recv_xattr_request(struct file_struct *file, int f_in) + rsync_xa *rxa; + int rel_pos, cnt, num, got_xattr_data = 0; + ++ if (protocol_version < 30) ++ return 0; ++ + if (F_XATTR(file) < 0) { + rprintf(FERROR, "recv_xattr_request: internal data error!\n"); + exit_cleanup(RERR_PROTOCOL); +@@ -649,7 +666,22 @@ void receive_xattr(int f, struct file_struct *file) + #else + int need_sort = 1; #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) -@@ -819,6 +820,11 @@ version makes it incompatible with sendi - rsync unless you double the bf(--acls) option (e.g. bf(-AA)). This - doubling is not needed when pulling files from an older rsync. - -+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 +1,415 @@ -+/* -+ * 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; -+extern int preserve_xattrs; -+extern unsigned int file_struct_len; -+ -+#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; -+} -+ -+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) -+{ +- 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" +@@ -662,7 +694,7 @@ void receive_xattr(int f, struct file_struct *file) + 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; + } +@@ -670,9 +702,10 @@ void receive_xattr(int f, struct file_struct *file) + 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) + || (dget_len + extra_len + name_len < dget_len))