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Tue, 26 Jan 2021 20:33:43 +0000 (UTC) From: mwilck@suse.com To: Keith Busch , linux-nvme@lists.infradead.org Subject: [PATCH 02/35] monitor: create udev socket Date: Tue, 26 Jan 2021 21:32:51 +0100 Message-Id: <20210126203324.23610-3-mwilck@suse.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210126203324.23610-1-mwilck@suse.com> References: <20210126203324.23610-1-mwilck@suse.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210126_153345_747994_FEC08385 X-CRM114-Status: GOOD ( 16.16 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Hannes Reinecke , Chaitanya Kulkarni , Martin Wilck Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Martin Wilck Signed-off-by: Martin Wilck --- monitor.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 47 insertions(+), 3 deletions(-) diff --git a/monitor.c b/monitor.c index dae4975..626827c 100644 --- a/monitor.c +++ b/monitor.c @@ -15,14 +15,58 @@ * This file implements a simple monitor for NVMe-related uevents. */ +#include #include +#include #include "nvme-status.h" #include "monitor.h" -int aen_monitor(const char *desc, int argc, char **argv) +static struct udev *udev; + +static void cleanup_monitor(struct udev_monitor **pmon) { - /* Handle as unimplemented for now */ - return nvme_status_to_errno(-ENOTTY, true); + if (*pmon) { + udev_monitor_unref(*pmon); + *pmon = NULL; + } } +static int create_udev_monitor(struct udev_monitor **pmon) +{ + struct udev_monitor *mon __attribute((cleanup(cleanup_monitor))) = NULL; + int ret; + + if (!udev) { + udev = udev_new(); + if (!udev) + return -ENOMEM; + } + mon = udev_monitor_new_from_netlink(udev, "kernel"); + if (!mon) + return errno ? -errno : -ENOMEM; + + /* + * This fails in unpriviliged mode. Use the same value as udevd. + * We may able to decrease this buffer size later. + */ + (void)udev_monitor_set_receive_buffer_size(mon, 128*1024*1024); + ret = udev_monitor_enable_receiving(mon); + if (ret < 0) + return ret; + *pmon = mon; + mon = NULL; + return 0; +} + +int aen_monitor(const char *desc, int argc, char **argv) +{ + int ret; + struct udev_monitor *monitor; + + ret = create_udev_monitor(&monitor); + if (ret == 0) + udev_monitor_unref(monitor); + udev = udev_unref(udev); + return nvme_status_to_errno(ret, true); +} -- 2.29.2 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme