Extended attribute values can potentially be quite large. One test for ZFS is supposed to set a 200MB xattr. However, the buffer size for reading values from stdin with setextattr -i is so small that the test times out waiting for tiny chunks of data to be buffered and appended to an sbuf. Increasing the buffer size should help alleviate some of the burden of reallocating larger sbufs when writing large extended attributes. Submitted by: Ryan Moeller <ryan@freqlabs.com> MFC after: 2 weeks Sponsored by: iXsystems, Inc. Differential Revision: https://reviews.freebsd.org/D23211
318 lines
7.9 KiB
C
318 lines
7.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2002, 2003 Networks Associates Technology, Inc.
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* Copyright (c) 2002 Poul-Henning Kamp.
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* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Poul-Henning
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* Kamp and Network Associates Laboratories, the Security Research Division
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* of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/sbuf.h>
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#include <sys/uio.h>
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#include <sys/extattr.h>
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#include <libgen.h>
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#include <libutil.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include <err.h>
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#include <errno.h>
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static enum { EADUNNO, EAGET, EASET, EARM, EALS } what = EADUNNO;
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static void __dead2
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usage(void)
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{
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switch (what) {
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case EAGET:
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fprintf(stderr, "usage: getextattr [-fhqsx] attrnamespace");
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fprintf(stderr, " attrname filename ...\n");
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exit(-1);
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case EASET:
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fprintf(stderr, "usage: setextattr [-fhnq] attrnamespace");
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fprintf(stderr, " attrname attrvalue filename ...\n");
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fprintf(stderr, " or setextattr -i [-fhnq] attrnamespace");
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fprintf(stderr, " attrname filename ...\n");
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exit(-1);
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case EARM:
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fprintf(stderr, "usage: rmextattr [-fhq] attrnamespace");
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fprintf(stderr, " attrname filename ...\n");
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exit(-1);
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case EALS:
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fprintf(stderr, "usage: lsextattr [-fhq] attrnamespace");
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fprintf(stderr, " filename ...\n");
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exit(-1);
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case EADUNNO:
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default:
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fprintf(stderr, "usage: (getextattr|lsextattr|rmextattr");
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fprintf(stderr, "|setextattr)\n");
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exit (-1);
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}
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}
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static void
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mkbuf(char **buf, int *oldlen, int newlen)
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{
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if (*oldlen >= newlen)
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return;
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if (*buf != NULL)
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free(*buf);
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*buf = malloc(newlen);
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if (*buf == NULL)
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err(1, "malloc");
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*oldlen = newlen;
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return;
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}
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int
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main(int argc, char *argv[])
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{
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#define STDIN_BUF_SZ 4096
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char stdin_data[STDIN_BUF_SZ];
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char *p;
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const char *options, *attrname;
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size_t len;
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ssize_t ret;
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int ch, error, i, arg_counter, attrnamespace, minargc;
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char *visbuf = NULL;
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int visbuflen = 0;
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char *buf = NULL;
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int buflen = 0;
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struct sbuf *attrvalue = NULL;
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int flag_force = 0;
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int flag_nofollow = 0;
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int flag_null = 0;
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int count_quiet = 0;
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int flag_from_stdin = 0;
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int flag_string = 0;
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int flag_hex = 0;
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p = basename(argv[0]);
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if (p == NULL)
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p = argv[0];
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if (!strcmp(p, "getextattr")) {
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what = EAGET;
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options = "fhqsx";
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minargc = 3;
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} else if (!strcmp(p, "setextattr")) {
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what = EASET;
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options = "fhinq";
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minargc = 3;
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} else if (!strcmp(p, "rmextattr")) {
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what = EARM;
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options = "fhq";
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minargc = 3;
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} else if (!strcmp(p, "lsextattr")) {
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what = EALS;
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options = "fhq";
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minargc = 2;
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} else {
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usage();
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}
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while ((ch = getopt(argc, argv, options)) != -1) {
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switch (ch) {
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case 'f':
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flag_force = 1;
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break;
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case 'h':
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flag_nofollow = 1;
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break;
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case 'i':
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flag_from_stdin = 1;
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break;
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case 'n':
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flag_null = 1;
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break;
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case 'q':
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count_quiet += 1;
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break;
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case 's':
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flag_string = 1;
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break;
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case 'x':
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flag_hex = 1;
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break;
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case '?':
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (what == EASET && flag_from_stdin == 0)
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minargc++;
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if (argc < minargc)
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usage();
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error = extattr_string_to_namespace(argv[0], &attrnamespace);
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if (error)
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err(-1, "%s", argv[0]);
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argc--; argv++;
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if (what != EALS) {
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attrname = argv[0];
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argc--; argv++;
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} else
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attrname = NULL;
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if (what == EASET) {
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attrvalue = sbuf_new_auto();
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if (flag_from_stdin) {
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while ((error = read(0, stdin_data, STDIN_BUF_SZ)) > 0)
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sbuf_bcat(attrvalue, stdin_data, error);
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} else {
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sbuf_cpy(attrvalue, argv[0]);
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argc--; argv++;
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}
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sbuf_finish(attrvalue);
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}
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for (arg_counter = 0; arg_counter < argc; arg_counter++) {
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switch (what) {
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case EARM:
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if (flag_nofollow)
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error = extattr_delete_link(argv[arg_counter],
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attrnamespace, attrname);
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else
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error = extattr_delete_file(argv[arg_counter],
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attrnamespace, attrname);
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if (error >= 0)
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continue;
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break;
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case EASET:
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len = sbuf_len(attrvalue) + flag_null;
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if (flag_nofollow)
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ret = extattr_set_link(argv[arg_counter],
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attrnamespace, attrname,
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sbuf_data(attrvalue), len);
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else
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ret = extattr_set_file(argv[arg_counter],
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attrnamespace, attrname,
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sbuf_data(attrvalue), len);
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if (ret >= 0) {
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if ((size_t)ret != len && !count_quiet) {
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warnx("Set %zd bytes of %zu for %s",
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ret, len, attrname);
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}
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continue;
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}
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break;
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case EALS:
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if (flag_nofollow)
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ret = extattr_list_link(argv[arg_counter],
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attrnamespace, NULL, 0);
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else
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ret = extattr_list_file(argv[arg_counter],
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attrnamespace, NULL, 0);
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if (ret < 0)
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break;
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mkbuf(&buf, &buflen, ret);
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if (flag_nofollow)
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ret = extattr_list_link(argv[arg_counter],
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attrnamespace, buf, buflen);
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else
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ret = extattr_list_file(argv[arg_counter],
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attrnamespace, buf, buflen);
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if (ret < 0)
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break;
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if (!count_quiet)
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printf("%s\t", argv[arg_counter]);
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for (i = 0; i < ret; i += ch + 1) {
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/* The attribute name length is unsigned. */
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ch = (unsigned char)buf[i];
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printf("%s%*.*s", i ? "\t" : "",
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ch, ch, buf + i + 1);
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}
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if (!count_quiet || ret > 0)
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printf("\n");
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continue;
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case EAGET:
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if (flag_nofollow)
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ret = extattr_get_link(argv[arg_counter],
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attrnamespace, attrname, NULL, 0);
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else
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ret = extattr_get_file(argv[arg_counter],
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attrnamespace, attrname, NULL, 0);
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if (ret < 0)
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break;
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mkbuf(&buf, &buflen, ret);
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if (flag_nofollow)
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ret = extattr_get_link(argv[arg_counter],
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attrnamespace, attrname, buf, buflen);
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else
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ret = extattr_get_file(argv[arg_counter],
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attrnamespace, attrname, buf, buflen);
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if (ret < 0)
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break;
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if (!count_quiet)
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printf("%s\t", argv[arg_counter]);
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if (flag_string) {
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mkbuf(&visbuf, &visbuflen, ret * 4 + 1);
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strvisx(visbuf, buf, ret,
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VIS_SAFE | VIS_WHITE);
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printf("\"%s\"", visbuf);
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} else if (flag_hex) {
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for (i = 0; i < ret; i++)
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printf("%s%02x", i ? " " : "",
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(unsigned char)buf[i]);
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} else {
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fwrite(buf, ret, 1, stdout);
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}
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if (count_quiet < 2)
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printf("\n");
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continue;
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default:
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break;
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}
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if (!count_quiet)
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warn("%s: failed", argv[arg_counter]);
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if (flag_force)
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continue;
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return(1);
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}
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return (0);
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}
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