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([203.56.128.103]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7106ed16cb3sm4576038b3a.179.2024.08.04.17.31.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 04 Aug 2024 17:31:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1722817904; x=1723422704; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=hbxagQGZ9enwm2uWyobspLUjv+kLe0ys5wANtBKsnzE=; b=CZ1DcJwZuqy/nrM8pY5oc5XgukNTvh4OffcFLyd3oxKMZDsUYaGuZFQ3yicXXaaZyk bDFVhKOQ6tgnchLnIqOSP1xSpAot9W1RljpQlUWAcJLpJWivoRO/rHkjl1e/o6eDovCH PlmZecFGjRZZbyzCfGFR964hRQcShryN8dTxYsKVkG/cHUtBXhFXR0ZcqWQE0tEveW20 1FM+hU3DDmUXMEI9YAX88h36u4mXkZmBSoRXOysYkFPqbOfpyBfv6e/Hz1BmeXg06via UMjyDLAiKkYlrb+2GVKqJNVNhF2PxLyvy5VjksJYt1MmAWRWQbS0/KpYEENFnM8joqjI 6Euw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722817904; x=1723422704; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hbxagQGZ9enwm2uWyobspLUjv+kLe0ys5wANtBKsnzE=; b=ICOfgLHxGY705U8ryk2DvRz03OXMMZnO2jNu2cCfK8sAJvFGnbVRpGMpC+zmKLKGPu wA9SDkFN1xMvGm60hxMpOdijchlZUrESZ1lZkK0nTVkmgCTz/D5ZKWaiwgfLdLKcyAJm rS11y0wksvqM/VdHue7ea6EN+8UwVtHaI5kO9g2tvotyqwiAUi3AHfmcJOIjKkLy7xKC FHXCwkeVlY4eKyAs7GPKtEimMs3la7MzXOGFzPrI0tkWpKIhwZFphd5otpqhAGzaWzpl L4EeRVWLn0uORDe/1/UEls+ShrdwS4Qag4Tg90IgrA7XC4l1bdcJbZ0cSCoYuLaO4RE5 Homg== X-Gm-Message-State: AOJu0Yx7ZNyNX7D84xnrCEBpjjo7/PG4d3Uhdv/R5RptUi6/E/Kid9+F MuHPbrYi662E4ltNA9W38EaUBEQnQo+MMfx/xjIzyurKU1VCML+9WHCHu6kGPF4iGvBwN5xqhKG /yM+JuA== X-Google-Smtp-Source: AGHT+IFkkUC+mFjLaRBAUN6z7tpvd3EEx0ZAA7xLlBHfBHi/onGdIPKnCeGszYUm0YHph88ERT6c3g== X-Received: by 2002:a05:6a00:2406:b0:70d:14d1:1bad with SMTP id d2e1a72fcca58-7106d9d9330mr18041602b3a.3.1722817904230; Sun, 04 Aug 2024 17:31:44 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PULL 2/6] qemu/osdep: Move close_all_open_fds() to oslib-posix Date: Mon, 5 Aug 2024 10:31:25 +1000 Message-ID: <20240805003130.1421051-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240805003130.1421051-1-richard.henderson@linaro.org> References: <20240805003130.1421051-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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=2607:f8b0:4864:20::430; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x430.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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 @linaro.org) X-ZM-MESSAGEID: 1722818008664116600 From: Cl=C3=A9ment L=C3=A9ger Move close_all_open_fds() in oslib-posix, rename it qemu_close_all_open_fds() and export it. Signed-off-by: Cl=C3=A9ment L=C3=A9ger Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Richard Henderson Message-ID: <20240802145423.3232974-2-cleger@rivosinc.com> Signed-off-by: Richard Henderson --- include/qemu/osdep.h | 7 +++++++ system/async-teardown.c | 37 +------------------------------------ util/oslib-posix.c | 34 ++++++++++++++++++++++++++++++++++ 3 files changed, 42 insertions(+), 36 deletions(-) diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index 720ed21a7e..de77c5c254 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -757,6 +757,13 @@ static inline void qemu_reset_optind(void) =20 int qemu_fdatasync(int fd); =20 +/** + * qemu_close_all_open_fd: + * + * Close all open file descriptors + */ +void qemu_close_all_open_fd(void); + /** * Sync changes made to the memory mapped file back to the backing * storage. For POSIX compliant systems this will fallback diff --git a/system/async-teardown.c b/system/async-teardown.c index 396963c091..edf49e1007 100644 --- a/system/async-teardown.c +++ b/system/async-teardown.c @@ -26,40 +26,6 @@ =20 static pid_t the_ppid; =20 -/* - * Close all open file descriptors. - */ -static void close_all_open_fd(void) -{ - struct dirent *de; - int fd, dfd; - DIR *dir; - -#ifdef CONFIG_CLOSE_RANGE - int r =3D close_range(0, ~0U, 0); - if (!r) { - /* Success, no need to try other ways. */ - return; - } -#endif - - dir =3D opendir("/proc/self/fd"); - if (!dir) { - /* If /proc is not mounted, there is nothing that can be done. */ - return; - } - /* Avoid closing the directory. */ - dfd =3D dirfd(dir); - - for (de =3D readdir(dir); de; de =3D readdir(dir)) { - fd =3D atoi(de->d_name); - if (fd !=3D dfd) { - close(fd); - } - } - closedir(dir); -} - static void hup_handler(int signal) { /* Check every second if this process has been reparented. */ @@ -85,9 +51,8 @@ static int async_teardown_fn(void *arg) /* * Close all file descriptors that might have been inherited from the * main qemu process when doing clone, needed to make libvirt happy. - * Not using close_range for increased compatibility with older kernel= s. */ - close_all_open_fd(); + qemu_close_all_open_fd(); =20 /* Set up a handler for SIGHUP and unblock SIGHUP. */ sigaction(SIGHUP, &sa, NULL); diff --git a/util/oslib-posix.c b/util/oslib-posix.c index b090fe0eed..1e867efa47 100644 --- a/util/oslib-posix.c +++ b/util/oslib-posix.c @@ -807,3 +807,37 @@ int qemu_msync(void *addr, size_t length, int fd) =20 return msync(addr, length, MS_SYNC); } + +/* + * Close all open file descriptors. + */ +void qemu_close_all_open_fd(void) +{ + struct dirent *de; + int fd, dfd; + DIR *dir; + +#ifdef CONFIG_CLOSE_RANGE + int r =3D close_range(0, ~0U, 0); + if (!r) { + /* Success, no need to try other ways. */ + return; + } +#endif + + dir =3D opendir("/proc/self/fd"); + if (!dir) { + /* If /proc is not mounted, there is nothing that can be done. */ + return; + } + /* Avoid closing the directory. */ + dfd =3D dirfd(dir); + + for (de =3D readdir(dir); de; de =3D readdir(dir)) { + fd =3D atoi(de->d_name); + if (fd !=3D dfd) { + close(fd); + } + } + closedir(dir); +} --=20 2.43.0