Date: Tue, 11 Aug 2020 11:32:44 +0000 (UTC) From: Eugene Grosbein <eugen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r364107 - stable/12/usr.bin/xinstall Message-ID: <202008111132.07BBWiDc022305@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: eugen Date: Tue Aug 11 11:32:44 2020 New Revision: 364107 URL: https://svnweb.freebsd.org/changeset/base/364107 Log: MFC r363064,363067,363081,363136: optimize install(1) a bit. Currently, "install -s -S" behaviour is inefficient for upgrade. First it finds that destination file already exists and copies source file to temporary file. Then it calls strip(1) with name of temporary file as single agrument and our strip(1) creates another temporary file in the /tmp (or TMPDIR) making another copy that is finally copied to DESTDIR third time. Meantime, strip(1) has an option "-o dst" to specify destination so install(1) is allowed to skip initial copying from obj to DESTDIR. This change makes it do so. This optimization descreases total amount of data sent to both of /tmp and DESTDIR during "make installworld" by 32% or so. See the differential for details. Differential Revision: https://reviews.freebsd.org/D25551 Modified: stable/12/usr.bin/xinstall/xinstall.c Directory Properties: stable/12/ (props changed) Modified: stable/12/usr.bin/xinstall/xinstall.c ============================================================================== --- stable/12/usr.bin/xinstall/xinstall.c Tue Aug 11 10:56:44 2020 (r364106) +++ stable/12/usr.bin/xinstall/xinstall.c Tue Aug 11 11:32:44 2020 (r364107) @@ -136,7 +136,7 @@ static void install_dir(char *); static void metadata_log(const char *, const char *, struct timespec *, const char *, const char *, off_t); static int parseid(const char *, id_t *); -static void strip(const char *); +static int strip(const char *, int, const char *, char **); static int trymmap(int); static void usage(void); @@ -756,12 +756,13 @@ install(const char *from_name, const char *to_name, u_ { struct stat from_sb, temp_sb, to_sb; struct timespec tsb[2]; - int devnull, files_match, from_fd, serrno, target; + int devnull, files_match, from_fd, serrno, stripped, target; int tempcopy, temp_fd, to_fd; char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN]; char *digestresult; - files_match = 0; + digestresult = NULL; + files_match = stripped = 0; from_fd = -1; to_fd = -1; @@ -847,19 +848,24 @@ install(const char *from_name, const char *to_name, u_ (void)printf("install: %s -> %s\n", from_name, to_name); } - if (!devnull) - digestresult = copy(from_fd, from_name, to_fd, - tempcopy ? tempfile : to_name, from_sb.st_size); - else - digestresult = NULL; + if (!devnull) { + if (dostrip) + stripped = strip(tempcopy ? tempfile : to_name, + to_fd, from_name, &digestresult); + if (!stripped) + digestresult = copy(from_fd, from_name, to_fd, + tempcopy ? tempfile : to_name, from_sb.st_size); + } } if (dostrip) { - strip(tempcopy ? tempfile : to_name); + if (!stripped) + (void)strip(tempcopy ? tempfile : to_name, to_fd, + NULL, &digestresult); /* - * Re-open our fd on the target, in case we used a strip - * that does not work in-place -- like GNU binutils strip. + * Re-open our fd on the target, in case + * we did not strip in-place. */ close(to_fd); to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY, 0); @@ -1046,7 +1052,9 @@ install(const char *from_name, const char *to_name, u_ /* * compare -- - * compare two files; non-zero means files differ + * Compare two files; non-zero means files differ. + * Compute digest and return its address in *dresp + * unless it points to pre-computed digest. */ static int compare(int from_fd, const char *from_name __unused, size_t from_len, @@ -1055,15 +1063,17 @@ compare(int from_fd, const char *from_name __unused, s { char *p, *q; int rv; - int done_compare; + int do_digest, done_compare; DIGEST_CTX ctx; rv = 0; if (from_len != to_len) return 1; + do_digest = (digesttype != DIGEST_NONE && dresp != NULL && + *dresp == NULL); if (from_len <= MAX_CMP_SIZE) { - if (dresp != NULL) + if (do_digest) digest_init(&ctx); done_compare = 0; if (trymmap(from_fd) && trymmap(to_fd)) { @@ -1079,7 +1089,7 @@ compare(int from_fd, const char *from_name __unused, s } rv = memcmp(p, q, from_len); - if (dresp != NULL) + if (do_digest) digest_update(&ctx, p, from_len); munmap(p, from_len); munmap(q, from_len); @@ -1106,7 +1116,8 @@ compare(int from_fd, const char *from_name __unused, s rv = 1; /* out of sync */ } else rv = 1; /* read failure */ - digest_update(&ctx, buf1, n1); + if (do_digest) + digest_update(&ctx, buf1, n1); } lseek(from_fd, 0, SEEK_SET); lseek(to_fd, 0, SEEK_SET); @@ -1114,7 +1125,7 @@ compare(int from_fd, const char *from_name __unused, s } else rv = 1; /* don't bother in this case */ - if (dresp != NULL) { + if (do_digest) { if (rv == 0) *dresp = digest_end(&ctx, NULL); else @@ -1287,22 +1298,34 @@ copy(int from_fd, const char *from_name, int to_fd, co /* * strip -- - * use strip(1) to strip the target file + * Use strip(1) to strip the target file. + * Just invoke strip(1) on to_name if from_name is NULL, else try + * to run "strip -o to_name -- from_name" and return 0 on failure. + * Return 1 on success and assign result of digest_file(to_name) + * to *dresp. */ -static void -strip(const char *to_name) +static int +strip(const char *to_name, int to_fd, const char *from_name, char **dresp) { const char *stripbin; - const char *args[3]; + const char *args[6]; pid_t pid; - int error, status; + int error, serrno, status; stripbin = getenv("STRIPBIN"); if (stripbin == NULL) stripbin = "strip"; args[0] = stripbin; - args[1] = to_name; - args[2] = NULL; + if (from_name == NULL) { + args[1] = to_name; + args[2] = NULL; + } else { + args[1] = "-o"; + args[2] = to_name; + args[3] = "--"; + args[4] = from_name; + args[5] = NULL; + } error = posix_spawnp(&pid, stripbin, NULL, NULL, __DECONST(char **, args), environ); if (error != 0) { @@ -1317,10 +1340,21 @@ strip(const char *to_name) /* NOTREACHED */ } if (status != 0) { + if (from_name != NULL) + return (0); (void)unlink(to_name); errx(EX_SOFTWARE, "strip command %s failed on %s", stripbin, to_name); } + if (from_name != NULL && safecopy && fsync(to_fd) == -1) { + serrno = errno; + (void)unlink(to_name); + errno = serrno; + err(EX_OSERR, "fsync failed for %s", to_name); + } + if (dresp != NULL) + *dresp = digest_file(to_name); + return (1); } /*
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202008111132.07BBWiDc022305>