From patchwork Tue Oct 26 11:52:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ondrej Mosnacek X-Patchwork-Id: 12584707 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 372D4C433EF for ; Tue, 26 Oct 2021 11:52:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2385C60F21 for ; Tue, 26 Oct 2021 11:52:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235595AbhJZLzR (ORCPT ); Tue, 26 Oct 2021 07:55:17 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:52585 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235590AbhJZLzQ (ORCPT ); Tue, 26 Oct 2021 07:55:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1635249172; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=FLR2Leyry+xeRohsPAJ1nP6iahXc6L+3sR8YziyaFhI=; b=gzjuhE3GndSjlnLLzsz0lvfvi16s/VuSkOF3HBCnObgz5202YV4sRYD3ShapDnBLgu/gQ3 elzGQxRb3ADKrz+14fzx41Enqer4q79WNUNEnAPCPhl9UzDX/a3u07sLbNeQJeiUdtZhCa +XEbfvW1xLjXF+1IL2I6QAJ+hZNmgE0= Received: from mail-ed1-f72.google.com (mail-ed1-f72.google.com [209.85.208.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-50-oia9OqGTMJ-I5bCJdoIMLw-1; Tue, 26 Oct 2021 07:52:51 -0400 X-MC-Unique: oia9OqGTMJ-I5bCJdoIMLw-1 Received: by mail-ed1-f72.google.com with SMTP id s18-20020a056402521200b003dd5902f4f3so2364454edd.23 for ; Tue, 26 Oct 2021 04:52:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=FLR2Leyry+xeRohsPAJ1nP6iahXc6L+3sR8YziyaFhI=; b=LjuY/OGqort+ac++2zycaoJwIsOIHoCj4B9mSMV5BJtiywFdSAzv8Yrjg8woAVry9t dI8yMyJMi9nA21CekL+BVmGi9eN94gJ90tJIkEtOXhdUHcvJqMdYakHCtZumgIBVxdAM XJ0uIg9wu5boamWNdYUyx2NzBpNS05dgZAQz84vo6iT2TJQj/ZMt8W4nZpRUxj9HwQyt TUCsT66ejtAUWvkgvMawAzkRa1HZ/1JmWIjopCmqNAfv/bubq3e9ZCJRHvQk+KDb/OB3 0U+SvCg6kZBrRZyGs4dAJXQ7i6zKySzNcD1is4E38iQBF3MgZjdGvaKFuPZ+xgsZUC8d 8+WA== X-Gm-Message-State: AOAM5320MJ8voF1XMYA3YmFSbp2WgwzaeN56SnB63YoPoJ1eefNHDEAw XsjUpT6/n0JcmMQi3mr3WralwbSFjHDXIqDa4ASM7p1nzqO9OFLg50mAArcGHGOsyZq52yZdJLr 3fJtwvSkwKb8ROVZnXB2WFwQRTje/+XBVy1JU7w/q8FkhFKWcq1NmYZPnqT3Ld4JYODHBuA== X-Received: by 2002:a05:6402:27d2:: with SMTP id c18mr36046202ede.186.1635249170194; Tue, 26 Oct 2021 04:52:50 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz49rsOk3cF7aGpV40Ykle8b2IFO/dQcA3+CORHiiB/0WfPMlsqPLVgZFjB9w4hRAyQauHEwA== X-Received: by 2002:a05:6402:27d2:: with SMTP id c18mr36046160ede.186.1635249169793; Tue, 26 Oct 2021 04:52:49 -0700 (PDT) Received: from localhost.localdomain ([2a02:8308:b105:dd00:d067:83f0:d612:b70f]) by smtp.gmail.com with ESMTPSA id v15sm10658105edi.89.2021.10.26.04.52.49 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Oct 2021 04:52:49 -0700 (PDT) From: Ondrej Mosnacek To: selinux@vger.kernel.org Subject: [PATCH userspace v4 8/8] setfiles/restorecon: support parallel relabeling Date: Tue, 26 Oct 2021 13:52:39 +0200 Message-Id: <20211026115239.267449-9-omosnace@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211026115239.267449-1-omosnace@redhat.com> References: <20211026115239.267449-1-omosnace@redhat.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: selinux@vger.kernel.org Use the newly introduced selinux_restorecon_parallel(3) in setfiles/restorecon and a -T option to both to allow enabling parallel relabeling. The default behavior without specifying the -T option is to use 1 thread; parallel relabeling must be requested explicitly by passing -T 0 (which will use as many threads as there are available CPU cores) or -T , which will use threads. === Benchmarks === As measured on a 32-core cloud VM with Fedora 34. Not a fully representative environment, but still the scaling is quite good. WITHOUT PATCHES: $ time restorecon -rn /usr real 0m21.689s user 0m21.070s sys 0m0.494s WITH PATCHES: $ time restorecon -rn /usr real 0m23.940s user 0m23.127s sys 0m0.653s $ time restorecon -rn -T 2 /usr real 0m13.145s user 0m25.306s sys 0m0.695s $ time restorecon -rn -T 4 /usr real 0m7.559s user 0m28.470s sys 0m1.099s $ time restorecon -rn -T 8 /usr real 0m5.186s user 0m37.450s sys 0m2.094s $ time restorecon -rn -T 16 /usr real 0m3.831s user 0m51.220s sys 0m4.895s $ time restorecon -rn -T 32 /usr real 0m2.650s user 1m5.136s sys 0m6.614s Note that the benchmarks were performed in read-only mode (-n), so the labels were only read and looked up in the database, not written. When fixing labels on a heavily mislabeled system, the scaling would likely be event better, since a larger % of work could be done in parallel. Signed-off-by: Ondrej Mosnacek --- policycoreutils/setfiles/Makefile | 2 +- policycoreutils/setfiles/restore.c | 7 ++++--- policycoreutils/setfiles/restore.h | 2 +- policycoreutils/setfiles/restorecon.8 | 9 +++++++++ policycoreutils/setfiles/setfiles.8 | 9 +++++++++ policycoreutils/setfiles/setfiles.c | 28 ++++++++++++++++----------- 6 files changed, 41 insertions(+), 16 deletions(-) diff --git a/policycoreutils/setfiles/Makefile b/policycoreutils/setfiles/Makefile index 63d81850..d7670a8f 100644 --- a/policycoreutils/setfiles/Makefile +++ b/policycoreutils/setfiles/Makefile @@ -6,7 +6,7 @@ MANDIR = $(PREFIX)/share/man AUDITH ?= $(shell test -f /usr/include/libaudit.h && echo y) CFLAGS ?= -g -Werror -Wall -W -override LDLIBS += -lselinux -lsepol +override LDLIBS += -lselinux -lsepol -lpthread ifeq ($(AUDITH), y) override CFLAGS += -DUSE_AUDIT diff --git a/policycoreutils/setfiles/restore.c b/policycoreutils/setfiles/restore.c index 9d688c60..74d48bb3 100644 --- a/policycoreutils/setfiles/restore.c +++ b/policycoreutils/setfiles/restore.c @@ -72,7 +72,7 @@ void restore_finish(void) } } -int process_glob(char *name, struct restore_opts *opts) +int process_glob(char *name, struct restore_opts *opts, size_t nthreads) { glob_t globbuf; size_t i = 0; @@ -91,8 +91,9 @@ int process_glob(char *name, struct restore_opts *opts) continue; if (len > 0 && strcmp(&globbuf.gl_pathv[i][len], "/..") == 0) continue; - rc = selinux_restorecon(globbuf.gl_pathv[i], - opts->restorecon_flags); + rc = selinux_restorecon_parallel(globbuf.gl_pathv[i], + opts->restorecon_flags, + nthreads); if (rc < 0) errors = rc; } diff --git a/policycoreutils/setfiles/restore.h b/policycoreutils/setfiles/restore.h index ac6ad680..bb35a1db 100644 --- a/policycoreutils/setfiles/restore.h +++ b/policycoreutils/setfiles/restore.h @@ -49,7 +49,7 @@ struct restore_opts { void restore_init(struct restore_opts *opts); void restore_finish(void); void add_exclude(const char *directory); -int process_glob(char *name, struct restore_opts *opts); +int process_glob(char *name, struct restore_opts *opts, size_t nthreads); extern char **exclude_list; #endif diff --git a/policycoreutils/setfiles/restorecon.8 b/policycoreutils/setfiles/restorecon.8 index 668486f6..e07db2c8 100644 --- a/policycoreutils/setfiles/restorecon.8 +++ b/policycoreutils/setfiles/restorecon.8 @@ -33,6 +33,8 @@ restorecon \- restore file(s) default SELinux security contexts. .RB [ \-W ] .RB [ \-I | \-D ] .RB [ \-x ] +.RB [ \-T +.IR nthreads ] .SH "DESCRIPTION" This manual page describes the @@ -160,6 +162,13 @@ prevent .B restorecon from crossing file system boundaries. .TP +.BI \-T \ nthreads +use up to +.I nthreads +threads. Specify 0 to create as many threads as there are available +CPU cores; 1 to use only a single thread (default); or any positive +number to use the given number of threads (if possible). +.TP .SH "ARGUMENTS" .IR pathname \ ... The pathname for the file(s) to be relabeled. diff --git a/policycoreutils/setfiles/setfiles.8 b/policycoreutils/setfiles/setfiles.8 index 4d28bc9a..15f939d1 100644 --- a/policycoreutils/setfiles/setfiles.8 +++ b/policycoreutils/setfiles/setfiles.8 @@ -19,6 +19,8 @@ setfiles \- set SELinux file security contexts. .RB [ \-W ] .RB [ \-F ] .RB [ \-I | \-D ] +.RB [ \-T +.IR nthreads ] .I spec_file .IR pathname \ ... @@ -161,6 +163,13 @@ quote marks or backslashes. The option of GNU .B find produces input suitable for this mode. +.TP +.BI \-T \ nthreads +use up to +.I nthreads +threads. Specify 0 to create as many threads as there are available +CPU cores; 1 to use only a single thread (default); or any positive +number to use the given number of threads (if possible). .SH "ARGUMENTS" .TP diff --git a/policycoreutils/setfiles/setfiles.c b/policycoreutils/setfiles/setfiles.c index f018d161..2313a21f 100644 --- a/policycoreutils/setfiles/setfiles.c +++ b/policycoreutils/setfiles/setfiles.c @@ -1,4 +1,5 @@ #include "restore.h" +#include #include #include #include @@ -34,14 +35,14 @@ static __attribute__((__noreturn__)) void usage(const char *const name) { if (iamrestorecon) { fprintf(stderr, - "usage: %s [-iIDFmnprRv0x] [-e excludedir] pathname...\n" - "usage: %s [-iIDFmnprRv0x] [-e excludedir] -f filename\n", + "usage: %s [-iIDFmnprRv0xT] [-e excludedir] pathname...\n" + "usage: %s [-iIDFmnprRv0xT] [-e excludedir] -f filename\n", name, name); } else { fprintf(stderr, - "usage: %s [-diIDlmnpqvEFW] [-e excludedir] [-r alt_root_path] [-c policyfile] spec_file pathname...\n" - "usage: %s [-diIDlmnpqvEFW] [-e excludedir] [-r alt_root_path] [-c policyfile] spec_file -f filename\n" - "usage: %s -s [-diIDlmnpqvFW] spec_file\n", + "usage: %s [-diIDlmnpqvEFWT] [-e excludedir] [-r alt_root_path] [-c policyfile] spec_file pathname...\n" + "usage: %s [-diIDlmnpqvEFWT] [-e excludedir] [-r alt_root_path] [-c policyfile] spec_file -f filename\n" + "usage: %s -s [-diIDlmnpqvFWT] spec_file\n", name, name, name); } exit(-1); @@ -144,12 +145,12 @@ int main(int argc, char **argv) int opt, i = 0; const char *input_filename = NULL; int use_input_file = 0; - char *buf = NULL; - size_t buf_len; + char *buf = NULL, *endptr; + size_t buf_len, nthreads = 1; const char *base; int errors = 0; - const char *ropts = "e:f:hiIDlmno:pqrsvFRW0x"; - const char *sopts = "c:de:f:hiIDlmno:pqr:svEFR:W0"; + const char *ropts = "e:f:hiIDlmno:pqrsvFRW0xT:"; + const char *sopts = "c:de:f:hiIDlmno:pqr:svEFR:W0T:"; const char *opts; union selinux_callback cb; @@ -370,6 +371,11 @@ int main(int argc, char **argv) usage(argv[0]); } break; + case 'T': + nthreads = strtoull(optarg, &endptr, 10); + if (*optarg == '\0' || *endptr != '\0') + usage(argv[0]); + break; case 'h': case '?': usage(argv[0]); @@ -448,13 +454,13 @@ int main(int argc, char **argv) buf[len - 1] = 0; if (!strcmp(buf, "/")) r_opts.mass_relabel = SELINUX_RESTORECON_MASS_RELABEL; - errors |= process_glob(buf, &r_opts) < 0; + errors |= process_glob(buf, &r_opts, nthreads) < 0; } if (strcmp(input_filename, "-") != 0) fclose(f); } else { for (i = optind; i < argc; i++) - errors |= process_glob(argv[i], &r_opts) < 0; + errors |= process_glob(argv[i], &r_opts, nthreads) < 0; } maybe_audit_mass_relabel(r_opts.mass_relabel, errors);