November 2022 - Libguestfs - Libguestfs List Archives

[PATCH v2] curl: Fix verification of CURLOPT_TLS13_CIPHERS

by Michal Orzel

The code checking for CURLOPT_TLS13_CIPHERS option did not work properly, because of incorrect assumption that this symbol was a preprocessor macro. It is in fact element of enum type, which resulted with #ifdef directive working improperly. Fix changes that check to be based on curl version instead. Signed-off-by: Michal Orzel <michalx.orzel(a)intel.com> --- plugins/curl/curl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/plugins/curl/curl.c b/plugins/curl/curl.c index 77f88fff..724ffd43 100644 --- a/plugins/curl/curl.c +++ b/plugins/curl/curl.c @@ -560,10 +560,11 @@ curl_open (int readonly) if (ssl_cipher_list) curl_easy_setopt (h->c, CURLOPT_SSL_CIPHER_LIST, ssl_cipher_list); if (tls13_ciphers) { -#ifdef CURLOPT_TLS13_CIPHERS +#if (LIBCURL_VERSION_MAJOR > 7) || \ + (LIBCURL_VERSION_MAJOR == 7 && LIBCURL_VERSION_MINOR >= 61) curl_easy_setopt (h->c, CURLOPT_TLS13_CIPHERS, tls13_ciphers); #else - /* This is not available in, eg, RHEL 7 */ + /* This is not available before curl-7.61 */ nbdkit_error ("tls13-ciphers is not supported in this build of " "nbdkit-curl-plugin"); goto err; -- 2.25.1 --------------------------------------------------------------------- Intel Technology Poland sp. z o.o. ul. Slowackiego 173 | 80-298 Gdansk | Sad Rejonowy Gdansk Polnoc | VII Wydzial Gospodarczy Krajowego Rejestru Sadowego - KRS 101882 | NIP 957-07-52-316 | Kapital zakladowy 200.000 PLN. Spolka oswiadcza, ze posiada status duzego przedsiebiorcy w rozumieniu ustawy z dnia 8 marca 2013 r. o przeciwdzialaniu nadmiernym opoznieniom w transakcjach handlowych. Ta wiadomosc wraz z zalacznikami jest przeznaczona dla okreslonego adresata i moze zawierac informacje poufne. W razie przypadkowego otrzymania tej wiadomosci, prosimy o powiadomienie nadawcy oraz trwale jej usuniecie; jakiekolwiek przegladanie lub rozpowszechnianie jest zabronione. This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). If you are not the intended recipient, please contact the sender and delete all copies; any review or distribution by others is strictly prohibited.

2 years

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[PATCH] curl: Fix verification of CURLOPT_TLS13_CIPHERS

by Michal Orzel

The code checking for CURLOPT_TLS13_CIPHERS option did not work properly, because of incorrect assumption that this symbol was a preprocessor macro. It is in fact element of enum type, which resulted with #ifdef directive working improperly. Change replaces compile-time verification with run-time, based on return value of curl_easy_setopt function. Signed-off-by: Michal Orzel <michalx.orzel(a)intel.com> --- plugins/curl/curl.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/plugins/curl/curl.c b/plugins/curl/curl.c index 9a818bfa..42b70f01 100644 --- a/plugins/curl/curl.c +++ b/plugins/curl/curl.c @@ -560,14 +560,13 @@ curl_open (int readonly) if (ssl_cipher_list) curl_easy_setopt (h->c, CURLOPT_SSL_CIPHER_LIST, ssl_cipher_list); if (tls13_ciphers) { -#ifdef CURLOPT_TLS13_CIPHERS - curl_easy_setopt (h->c, CURLOPT_TLS13_CIPHERS, tls13_ciphers); -#else - /* This is not available in, eg, RHEL 7 */ - nbdkit_error ("tls13-ciphers is not supported in this build of " - "nbdkit-curl-plugin"); - goto err; -#endif + r = curl_easy_setopt (h->c, CURLOPT_TLS13_CIPHERS, tls13_ciphers); + if (r != CURLE_OK) { + /* This is not available in, eg, RHEL 7 */ + display_curl_error (h, r, "curl_easy_setopt: CURLOPT_TLS13_CIPHERS [%s]", + tls13_ciphers); + goto err; + } } if (tcp_keepalive) curl_easy_setopt (h->c, CURLOPT_TCP_KEEPALIVE, 1L); -- 2.25.1 --------------------------------------------------------------------- Intel Technology Poland sp. z o.o. ul. Slowackiego 173 | 80-298 Gdansk | Sad Rejonowy Gdansk Polnoc | VII Wydzial Gospodarczy Krajowego Rejestru Sadowego - KRS 101882 | NIP 957-07-52-316 | Kapital zakladowy 200.000 PLN. Spolka oswiadcza, ze posiada status duzego przedsiebiorcy w rozumieniu ustawy z dnia 8 marca 2013 r. o przeciwdzialaniu nadmiernym opoznieniom w transakcjach handlowych. Ta wiadomosc wraz z zalacznikami jest przeznaczona dla okreslonego adresata i moze zawierac informacje poufne. W razie przypadkowego otrzymania tej wiadomosci, prosimy o powiadomienie nadawcy oraz trwale jej usuniecie; jakiekolwiek przegladanie lub rozpowszechnianie jest zabronione. This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). If you are not the intended recipient, please contact the sender and delete all copies; any review or distribution by others is strictly prohibited.

2 years

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[nbdkit PATCH] sh: Add exit status triggers for nbdkit_{shutdown, disconnect}

by Eric Blake

Make it possible for the sh and eval plugins to disconnect a client or shut down the entire nbdkit server by use of special return values. Prior to this patch we had reserved 4-7 for future use; this defines 4-6, and extends the set of reserved return values to 7-15. We figure it is unlikely that anyone is using status 8-15 with the intent that it behaves identically to status 1. For the testsuite, I only covered the eval plugin; but since it shares common code with the sh plugin, both styles should work. --- Finally got the testsuite additions for this in a state that I like. plugins/sh/nbdkit-sh-plugin.pod | 37 ++++++- tests/Makefile.am | 2 + plugins/sh/call.h | 9 +- plugins/sh/call.c | 85 +++++++-------- tests/test-eval-disconnect.sh | 185 ++++++++++++++++++++++++++++++++ 5 files changed, 268 insertions(+), 50 deletions(-) create mode 100755 tests/test-eval-disconnect.sh diff --git a/plugins/sh/nbdkit-sh-plugin.pod b/plugins/sh/nbdkit-sh-plugin.pod index 2a55fdc9..37139e1b 100644 --- a/plugins/sh/nbdkit-sh-plugin.pod +++ b/plugins/sh/nbdkit-sh-plugin.pod @@ -96,4 +96,4 @@ The script should exit with specific exit codes: The method was executed successfully. -=item 1 and 8-127 +=item 1 and 16-255 There was an error. The script may print on stderr an errno name, optionally followed by whitespace and a message, for example: @@ -123,9 +123,38 @@ The requested method is not supported by the script. For methods which return booleans, this code indicates false. -=item 4, 5, 6, 7 +=item S<4> -These exit codes are reserved for future use. +Triggers a call to the C function C<nbdkit_shutdown>, which requests +an asynchronous exit of the nbdkit server (disconnecting all clients). +Since the client may get a response before shutdown is complete, +nbdkit then treats empty stderr as success for the current callback, +and parses non-empty stderr as if the script had exited with code +S<1>. + +=item S<5> + +Triggers a call to the C function C<nbdkit_disconnect> with C<force> +set to true, which requests an abrupt disconnect of the current +client. The contents of stderr are irrelevant with this status, since +the client will not get a response. + +=item S<6> + +Triggers a call to the C function C<nbdkit_disconnect> with C<force> +set to false, which requests a soft disconnect of the current client +(future client requests are rejected with C<ESHUTDOWN> without calling +into the plugin, but current requests may complete). Since the client +will likely get the response to this command, nbdkit then treats empty +stderr as success for the current callback, and parses non-empty +stderr as if the script had exited with code S<1>. + +=item 7-15 + +These exit codes are reserved for future use. Note that versions of +nbdkit E<lt> 1.34 documented that codes S<8> through S<15> behaved +like code S<1>; although it is unlikely that many scripts relied on +this similarity in practice. =back @@ -578,4 +607,4 @@ Richard W.M. Jones =head1 COPYRIGHT -Copyright (C) 2018-2020 Red Hat Inc. +Copyright (C) 2018-2022 Red Hat Inc. diff --git a/tests/Makefile.am b/tests/Makefile.am index d59b797c..3994fc6a 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -768,12 +768,14 @@ TESTS += \ test-eval-file.sh \ test-eval-exports.sh \ test-eval-cache.sh \ + test-eval-disconnect.sh \ $(NULL) EXTRA_DIST += \ test-eval.sh \ test-eval-file.sh \ test-eval-exports.sh \ test-eval-cache.sh \ + test-eval-disconnect.sh \ $(NULL) # file plugin test. diff --git a/plugins/sh/call.h b/plugins/sh/call.h index 76de23a3..44767e81 100644 --- a/plugins/sh/call.h +++ b/plugins/sh/call.h @@ -1,5 +1,5 @@ /* nbdkit - * Copyright (C) 2018 Red Hat Inc. + * Copyright (C) 2018-2022 Red Hat Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are @@ -51,7 +51,12 @@ typedef enum exit_code { OK = 0, ERROR = 1, /* all script error codes are mapped to this */ MISSING = 2, /* method missing */ - RET_FALSE = 3 /* script exited with code 3 meaning false */ + RET_FALSE = 3, /* script exited with code 3 meaning false */ + SHUTDOWN = 4, /* call nbdkit_shutdown() before parsing stderr */ + DISC_FORCE = 5, /* call nbdkit_disconnect(true) */ + DISC_SOFT = 6, /* call nbdkit_disconnect(false) */ + /* 7 is reserved since 1.8; handle like ERROR for now */ + /* 8-15 are reserved since 1.34; handle like ERROR for now */ } exit_code; extern exit_code call (const char **argv) diff --git a/plugins/sh/call.c b/plugins/sh/call.c index 2fa94d88..7d0f2b16 100644 --- a/plugins/sh/call.c +++ b/plugins/sh/call.c @@ -1,5 +1,5 @@ /* nbdkit - * Copyright (C) 2018-2020 Red Hat Inc. + * Copyright (C) 2018-2022 Red Hat Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are @@ -397,17 +397,47 @@ call3 (const char *wbuf, size_t wbuflen, /* sent to stdin (can be NULL) */ return ret; } -static void -handle_script_error (const char *argv0, string *ebuf) +/* Normalize return codes and parse error string. */ +static exit_code +handle_script_error (const char *argv0, string *ebuf, exit_code code) { int err; size_t skip = 0; char *p; - if (ebuf->len == 0) { + switch (code) { + case OK: + case MISSING: + case RET_FALSE: + /* Script successful. */ + return code; + + case SHUTDOWN: + /* Use trigger, then handle empty ebuf specially below */ + nbdkit_shutdown (); + break; + + case DISC_FORCE: + case DISC_SOFT: + /* Use trigger, then handle empty ebuf specially below */ + nbdkit_disconnect (code == DISC_FORCE); + break; + + case ERROR: + default: + /* Error even if ebuf is empty */ err = EIO; + goto parse; + } + + assert (code >= SHUTDOWN && code <= DISC_SOFT); + if (ebuf->len == 0) + return OK; + err = ESHUTDOWN; + + parse: + if (ebuf->len == 0) goto no_error_message; - } /* Recognize the errno values that match NBD protocol errors */ if (ascii_strncasecmp (ebuf->ptr, "EPERM", 5) == 0) { @@ -502,6 +532,7 @@ handle_script_error (const char *argv0, string *ebuf) /* Set errno. */ errno = err; + return ERROR; } /* Call the script with parameters. Don't write to stdin or read from @@ -516,19 +547,7 @@ call (const char **argv) CLEANUP_FREE_STRING string ebuf = empty_vector; r = call3 (NULL, 0, &rbuf, &ebuf, argv); - switch (r) { - case OK: - case MISSING: - case RET_FALSE: - /* Script successful. */ - return r; - - case ERROR: - default: - /* Error case. */ - handle_script_error (argv[0], &ebuf); - return ERROR; - } + return handle_script_error (argv[0], &ebuf, r); } /* Call the script with parameters. Read from stdout and return the @@ -541,20 +560,10 @@ call_read (string *rbuf, const char **argv) CLEANUP_FREE_STRING string ebuf = empty_vector; r = call3 (NULL, 0, rbuf, &ebuf, argv); - switch (r) { - case OK: - case MISSING: - case RET_FALSE: - /* Script successful. */ - return r; - - case ERROR: - default: - /* Error case. */ + r = handle_script_error (argv[0], &ebuf, r); + if (r == ERROR) string_reset (rbuf); - handle_script_error (argv[0], &ebuf); - return ERROR; - } + return r; } /* Call the script with parameters. Write to stdin of the script. @@ -568,17 +577,5 @@ call_write (const char *wbuf, size_t wbuflen, const char **argv) CLEANUP_FREE_STRING string ebuf = empty_vector; r = call3 (wbuf, wbuflen, &rbuf, &ebuf, argv); - switch (r) { - case OK: - case MISSING: - case RET_FALSE: - /* Script successful. */ - return r; - - case ERROR: - default: - /* Error case. */ - handle_script_error (argv[0], &ebuf); - return ERROR; - } + return handle_script_error (argv[0], &ebuf, r); } diff --git a/tests/test-eval-disconnect.sh b/tests/test-eval-disconnect.sh new file mode 100755 index 00000000..8427e6fd --- /dev/null +++ b/tests/test-eval-disconnect.sh @@ -0,0 +1,185 @@ +#!/usr/bin/env bash +# nbdkit +# Copyright (C) 2022 Red Hat Inc. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# +# * Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# +# * Neither the name of Red Hat nor the names of its contributors may be +# used to endorse or promote products derived from this software without +# specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, +# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR +# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF +# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT +# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +# SUCH DAMAGE. + +# Check shutdown/disconnect behavior triggered by special status values + +source ./functions.sh +set -e +set -x + +requires_plugin eval +requires_nbdsh_uri + +sock=$(mktemp -u /tmp/nbdkit-test-sock.XXXXXX) +files="eval-disconnect.pid $sock" +rm -f $files +cleanup_fn rm -f $files + +# Start nbdkit with a plugin that fails writes according to the export +# name which must be numeric: a positive value leaves stderr empty, a +# non-positive one outputs EPERM first. Serve multiple clients. +serve() +{ + rm -f $files + start_nbdkit -P eval-disconnect.pid -U $sock eval \ + get_size=' echo 1024 ' \ + open=' if test $3 -le 0; then \ + echo EPERM > $tmpdir/err; echo $((-$3)); \ + else \ + : > $tmpdir/err; echo $3; \ + fi ' \ + flush=' exit 0 ' \ + pwrite=' cat >/dev/null; cat $tmpdir/err >&2; exit $2 ' +} +serve + +# Noisy status 0 succeeds, despite text to stderr +nbdsh -u "nbd+unix:///0?socket=$sock" -c - <<\EOF +h.pwrite(b"1", 0) +h.flush() +h.shutdown() +EOF + +# Silent status 1 fails; nbdkit turns lack of error into EIO +nbdsh -u "nbd+unix:///1?socket=$sock" -c - <<\EOF +import errno +try: + h.pwrite(b"1", 0) + assert False +except nbd.Error as ex: + assert ex.errnum == errno.EIO +h.flush() +h.shutdown() +EOF + +# Noisy status 1 fails with supplied EPERM +nbdsh -u "nbd+unix:///-1?socket=$sock" -c - <<\EOF +import errno +try: + h.pwrite(b"1", 0) + assert False +except nbd.Error as ex: + assert ex.errnum == errno.EPERM +h.flush() +h.shutdown() +EOF + +# Silent status 5 kills socket; libnbd detects dead socket as ENOTCONN +nbdsh -u "nbd+unix:///5?socket=$sock" -c - <<\EOF +import errno +try: + h.pwrite(b"1", 0) + assert False +except nbd.Error as ex: + assert ex.errnum == errno.ENOTCONN +assert h.aio_is_ready() is False +EOF + +# Noisy status 5 kills socket; libnbd detects dead socket as ENOTCONN +nbdsh -u "nbd+unix:///-5?socket=$sock" -c - <<\EOF +import errno +try: + h.pwrite(b"1", 0) + assert False +except nbd.Error as ex: + assert ex.errnum == errno.ENOTCONN +assert h.aio_is_ready() is False +EOF + +# Silent status 6 succeeds, but next command fails with ESHUTDOWN +nbdsh -u "nbd+unix:///6?socket=$sock" -c - <<\EOF +import errno +h.pwrite(b"1", 0) +try: + h.flush() + assert False +except nbd.Error as ex: + assert ex.errnum == errno.ESHUTDOWN +h.shutdown() +EOF + +# Noisy status 6 fails with supplied EPERM, next command fails with ESHUTDOWN +nbdsh -u "nbd+unix:///-6?socket=$sock" -c - <<\EOF +import errno +try: + h.pwrite(b"1", 0) + assert False +except nbd.Error as ex: + assert ex.errnum == errno.EPERM +try: + h.flush() + assert False +except nbd.Error as ex: + assert ex.errnum == errno.ESHUTDOWN +h.shutdown() +EOF + +# Silent status 4 kills the server. It is racy whether client sees a reply +# of success or sees the connection killed with libnbd giving ENOTCONN +nbdsh -u "nbd+unix:///4?socket=$sock" -c - <<\EOF +import errno +try: + h.pwrite(b"1", 0) +except nbd.Error as ex: + assert ex.errnum == errno.ENOTCONN +EOF + +# Server should die shortly, if not already dead at this point. +for (( i=0; i < 5; i++ )); do + kill -s 0 "$(cat eval-disconnect.pid)" || break + sleep 1 +done +if [ $i = 5 ]; then + echo "nbdkit didn't exit fast enough" + exit 1 +fi + +# Restart server; noisy status 4 races between EPERM or ENOTCONN +serve +nbdsh -u "nbd+unix:///-4?socket=$sock" -c - <<\EOF +import errno +try: + h.pwrite(b"1", 0) + assert False +except nbd.Error as ex: + assert ex.errnum == errno.EPERM or ex.errnum == errno.ENOTCONN +EOF + +# Server should die shortly, if not already dead at this point. +for (( i=0; i < 5; i++ )); do + kill -s 0 "$(cat eval-disconnect.pid)" || break + sleep 1 +done +if [ $i = 5 ]; then + echo "nbdkit didn't exit fast enough" + exit 1 +fi -- 2.38.1

2 years

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[PATCH libnbd 0/2] ocaml: Simplify the sockaddr test

by Richard W.M. Jones

Not as bad as I thought it would be! Rich.

2 years

3
5
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[PATCH libnbd] ocaml: Implement sockaddr type

by Richard W.M. Jones

This is pushed already, commit 50500aade9.

2 years

2
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Libguestfs November 2022