From: Ian Pilcher <arequipeno@gmail.com>
To: axboe@kernel.dk, pavel@ucw.cz
Cc: linux-leds@vger.kernel.org, linux-block@vger.kernel.org,
linux@vger.kernel.org, gregkh@linuxfoundation.org,
kabel@kernel.org
Subject: [PATCH 07/18] ledtrig-blkdev: Add constants, data types, and global variables
Date: Fri, 3 Sep 2021 15:45:37 -0500 [thread overview]
Message-ID: <20210903204548.2745354-8-arequipeno@gmail.com> (raw)
In-Reply-To: <20210903204548.2745354-1-arequipeno@gmail.com>
Signed-off-by: Ian Pilcher <arequipeno@gmail.com>
---
drivers/leds/trigger/ledtrig-blkdev.c | 52 +++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/drivers/leds/trigger/ledtrig-blkdev.c b/drivers/leds/trigger/ledtrig-blkdev.c
index 8cbeb80697ae..db8326874400 100644
--- a/drivers/leds/trigger/ledtrig-blkdev.c
+++ b/drivers/leds/trigger/ledtrig-blkdev.c
@@ -14,3 +14,55 @@ MODULE_DESCRIPTION("Block device LED trigger");
MODULE_AUTHOR("Ian Pilcher <arequipeno@gmail.com>");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS(LEDTRIG_BLKDEV);
+
+/* Default blink time & polling interval (milliseconds) */
+#define LEDTRIG_BLKDEV_BLINK_MSEC 75
+#define LEDTRIG_BLKDEV_INTERVAL 100
+
+/* Minimum VALUE for interval or blink_time */
+#define LEDTRIG_BLKDEV_MIN_TIME 25
+
+enum ledtrig_blkdev_mode {
+ LEDTRIG_BLKDEV_MODE_RO = 0, /* blink for reads */
+ LEDTRIG_BLKDEV_MODE_WO = 1, /* blink for writes */
+ LEDTRIG_BLKDEV_MODE_RW = 2 /* blink for reads and writes */
+};
+
+/* Trigger-specific info about a block device */
+struct ledtrig_blkdev_disk {
+ struct gendisk *gd;
+ struct kobject *dir; /* blkdev_leds dir */
+ struct hlist_head leds;
+ unsigned long read_ios;
+ unsigned long write_ios;
+ unsigned int generation;
+ bool read_act;
+ bool write_act;
+};
+
+/* For many-to-many relationships between "disks" (block devices) and LEDs */
+struct ledtrig_blkdev_link {
+ struct hlist_node disk_leds_node;
+ struct hlist_node led_disks_node;
+ struct ledtrig_blkdev_disk *disk;
+ struct ledtrig_blkdev_led *led;
+};
+
+/* Every LED associated with the blkdev trigger gets one of these */
+struct ledtrig_blkdev_led {
+ struct kobject *dir; /* block_devices dir */
+ struct led_classdev *led_dev;
+ unsigned int blink_msec;
+ struct hlist_head disks; /* linked block devs */
+ struct hlist_node leds_node;
+ enum ledtrig_blkdev_mode mode;
+};
+
+/* All LEDs associated with the trigger */
+static HLIST_HEAD(ledtrig_blkdev_leds);
+
+/* Total number of device-to-LED associations */
+static unsigned int ledtrig_blkdev_count;
+
+/* How often to check for drive activity - in jiffies */
+static unsigned int ledtrig_blkdev_interval;
--
2.31.1
next prev parent reply other threads:[~2021-09-03 20:46 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-03 20:45 [PATCH 00/18] Introduce block device LED trigger Ian Pilcher
2021-09-03 20:45 ` [PATCH 01/18] docs: Add block device (blkdev) LED trigger documentation Ian Pilcher
2021-09-04 6:29 ` Pavel Machek
2021-09-05 14:49 ` Ian Pilcher
2021-09-05 18:42 ` Pavel Machek
2021-09-05 23:13 ` Ian Pilcher
2021-09-03 20:45 ` [PATCH 02/18] ledtrig-blkdev: Add build infra for block device LED trigger Ian Pilcher
2021-09-03 20:45 ` [PATCH 03/18] ledtrig-blkdev: Add function placeholders needed by block changes Ian Pilcher
2021-09-04 16:57 ` kernel test robot
2021-09-03 20:45 ` [PATCH 04/18] block: Add block device LED trigger integrations Ian Pilcher
2021-09-03 20:45 ` [PATCH 05/18] ledtrig-blkdev: Implement functions called from block subsystem Ian Pilcher
2021-09-03 20:45 ` [PATCH 06/18] ledtrig-blkdev: Add function to get gendisk by name Ian Pilcher
2021-09-03 20:45 ` Ian Pilcher [this message]
2021-09-03 20:45 ` [PATCH 08/18] ledtrig-blkdev: Add miscellaneous helper functions Ian Pilcher
2021-09-04 6:00 ` Greg KH
2021-09-04 22:43 ` Ian Pilcher
2021-09-03 20:45 ` [PATCH 09/18] ledtrig-blkdev: Periodically check devices for activity & blink LEDs Ian Pilcher
2021-09-04 6:01 ` Greg KH
2021-09-05 14:39 ` Ian Pilcher
2021-09-05 14:51 ` Greg KH
2021-09-05 14:56 ` Ian Pilcher
2021-09-05 15:12 ` Greg KH
2021-09-05 16:55 ` Eric Biggers
2021-09-03 20:45 ` [PATCH 10/18] ledtrig-blkdev: Add function to associate the trigger with an LED Ian Pilcher
2021-09-03 20:45 ` [PATCH 11/18] ledtrig-blkdev: Add function to associate a device " Ian Pilcher
2021-09-03 20:45 ` [PATCH 12/18] ledtrig-blkdev: Add function to remove LED/device association Ian Pilcher
2021-09-03 20:45 ` [PATCH 13/18] ledtrig-blkdev: Add function to disassociate a device from all LEDs Ian Pilcher
2021-09-03 20:45 ` [PATCH 14/18] ledtrig-blkdev: Add function to disassociate an LED from the trigger Ian Pilcher
2021-09-03 20:45 ` [PATCH 15/18] ledtrig-blkdev: Add sysfs attributes to [un]link LEDs & devices Ian Pilcher
2021-09-04 5:57 ` Greg KH
2021-09-04 21:28 ` Ian Pilcher
2021-09-04 5:59 ` Greg KH
2021-09-04 22:35 ` Ian Pilcher
2021-09-05 14:51 ` Greg KH
2021-09-05 15:33 ` Ian Pilcher
2021-09-05 16:43 ` Greg KH
2021-09-03 20:45 ` [PATCH 16/18] ledtrig-blkdev: Add blink_time & interval sysfs attributes Ian Pilcher
2021-09-03 20:45 ` [PATCH 17/18] ledtrig-blkdev: Add mode (read/write/rw) sysfs attributue Ian Pilcher
2021-09-04 5:57 ` Greg KH
2021-09-04 21:01 ` Ian Pilcher
2021-09-05 14:50 ` Greg KH
2021-09-03 20:45 ` [PATCH 18/18] ledtrig-blkdev: Add initialization & exit functions Ian Pilcher
2021-09-04 6:35 ` [PATCH 00/18] Introduce block device LED trigger Pavel Machek
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