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s=mimecast20190719; t=1709533966; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7NotQ5xIVKyws1mpCsTlsyJuN2gRQCKdulXiWWxT8xE=; b=SsIoAtB19C6a+Xqi2cTnKQrGJOpdB1SaYiV+1zDJKp5tCpfkJghWlHNQzrNEOIP+EOVWLc t0qINo8vJVjkzt4qpy6OK0+M74X5lZWqJ6UGmXj7ghPK045cmH/gwVjfTA1bnIwO3dNNf4 VuY+NeUvyzMAj/B1Ub6xGVgWuYpK4rg= X-MC-Unique: wHchecvuMV6CWDi9PK9kPw-1 From: Markus Armbruster To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, Steve Sistare , Fabiano Rosas Subject: [PULL 18/18] migration: simplify exec migration functions Date: Mon, 4 Mar 2024 07:32:36 +0100 Message-ID: <20240304063236.213955-19-armbru@redhat.com> In-Reply-To: <20240304063236.213955-1-armbru@redhat.com> References: <20240304063236.213955-1-armbru@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.3 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.589, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1709534055523100003 Content-Type: text/plain; charset="utf-8" From: Steve Sistare Simplify the exec migration code by using list utility functions. As a side effect, this also fixes a minor memory leak. On function return, "g_auto(GStrv) argv" frees argv and each element, which is wrong, because the function does not own the individual elements. To compensate, the code uses g_steal_pointer which NULLs argv and prevents the destructor from running, but argv is leaked. Fixes: cbab4face57b ("migration: convert exec backend ...") Signed-off-by: Steve Sistare Reviewed-by: Fabiano Rosas Message-ID: <20240227153321.467343-4-armbru@redhat.com> Signed-off-by: Markus Armbruster --- migration/exec.c | 57 +++++++----------------------------------------- 1 file changed, 8 insertions(+), 49 deletions(-) diff --git a/migration/exec.c b/migration/exec.c index 47d2f3b8fb..20e6cccf8c 100644 --- a/migration/exec.c +++ b/migration/exec.c @@ -18,6 +18,7 @@ */ =20 #include "qemu/osdep.h" +#include "qapi/type-helpers.h" #include "qemu/error-report.h" #include "channel.h" #include "exec.h" @@ -39,51 +40,16 @@ const char *exec_get_cmd_path(void) } #endif =20 -/* provides the length of strList */ -static int -str_list_length(strList *list) -{ - int len =3D 0; - strList *elem; - - for (elem =3D list; elem !=3D NULL; elem =3D elem->next) { - len++; - } - - return len; -} - -static void -init_exec_array(strList *command, char **argv, Error **errp) -{ - int i =3D 0; - strList *lst; - - for (lst =3D command; lst; lst =3D lst->next) { - argv[i++] =3D lst->value; - } - - argv[i] =3D NULL; - return; -} - void exec_start_outgoing_migration(MigrationState *s, strList *command, Error **errp) { - QIOChannel *ioc; - - int length =3D str_list_length(command); - g_auto(GStrv) argv =3D (char **) g_new0(const char *, length + 1); - - init_exec_array(command, argv, errp); + QIOChannel *ioc =3D NULL; + g_auto(GStrv) argv =3D strv_from_str_list(command); + const char * const *args =3D (const char * const *) argv; g_autofree char *new_command =3D g_strjoinv(" ", (char **)argv); =20 trace_migration_exec_outgoing(new_command); - ioc =3D QIO_CHANNEL( - qio_channel_command_new_spawn( - (const char * const *) g_steal_pointer(&argv), - O_RDWR, - errp)); + ioc =3D QIO_CHANNEL(qio_channel_command_new_spawn(args, O_RDWR, errp)); if (!ioc) { return; } @@ -105,19 +71,12 @@ static gboolean exec_accept_incoming_migration(QIOChan= nel *ioc, void exec_start_incoming_migration(strList *command, Error **errp) { QIOChannel *ioc; - - int length =3D str_list_length(command); - g_auto(GStrv) argv =3D (char **) g_new0(const char *, length + 1); - - init_exec_array(command, argv, errp); + g_auto(GStrv) argv =3D strv_from_str_list(command); + const char * const *args =3D (const char * const *) argv; g_autofree char *new_command =3D g_strjoinv(" ", (char **)argv); =20 trace_migration_exec_incoming(new_command); - ioc =3D QIO_CHANNEL( - qio_channel_command_new_spawn( - (const char * const *) g_steal_pointer(&argv), - O_RDWR, - errp)); + ioc =3D QIO_CHANNEL(qio_channel_command_new_spawn(args, O_RDWR, errp)); if (!ioc) { return; } --=20 2.44.0