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@@ -1,60 +1,81 @@
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-What: /sys/class/pktcdvd/
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-Date: Oct. 2006
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-KernelVersion: 2.6.20
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-Contact: Thomas Maier <balagi@justmail.de>
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-Description:
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-
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sysfs interface
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sysfs interface
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---------------
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---------------
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+The pktcdvd module (packet writing driver) creates the following files in the
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+sysfs: (<devid> is in the format major:minor)
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+
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+What: /sys/class/pktcdvd/add
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+What: /sys/class/pktcdvd/remove
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+What: /sys/class/pktcdvd/device_map
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+Date: Oct. 2006
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+KernelVersion: 2.6.20
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+Contact: Thomas Maier <balagi@justmail.de>
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+Description:
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+
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+ add: (WO) Write a block device id (major:minor) to
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+ create a new pktcdvd device and map it to the
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+ block device.
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+
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+ remove: (WO) Write the pktcdvd device id (major:minor)
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+ to remove the pktcdvd device.
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+
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+ device_map: (RO) Shows the device mapping in format:
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+ pktcdvd[0-7] <pktdevid> <blkdevid>
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+
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+
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/dev
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/uevent
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+Date: Oct. 2006
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+KernelVersion: 2.6.20
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+Contact: Thomas Maier <balagi@justmail.de>
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+Description:
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+ dev: (RO) Device id
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+
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+ uevent: (WO) To send a uevent
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+
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+
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/packets_started
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/packets_finished
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/kb_written
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/kb_read
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/kb_read_gather
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/reset
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+Date: Oct. 2006
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+KernelVersion: 2.6.20
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+Contact: Thomas Maier <balagi@justmail.de>
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+Description:
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+ packets_started: (RO) Number of started packets.
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+
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+ packets_finished: (RO) Number of finished packets.
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+
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+ kb_written: (RO) kBytes written.
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+
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+ kb_read: (RO) kBytes read.
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+
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+ kb_read_gather: (RO) kBytes read to fill write packets.
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+
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+ reset: (WO) Write any value to it to reset
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+ pktcdvd device statistic values, like
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+ bytes read/written.
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+
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+
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/write_queue/size
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/write_queue/congestion_off
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+What: /sys/class/pktcdvd/pktcdvd[0-7]/write_queue/congestion_on
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+Date: Oct. 2006
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+KernelVersion: 2.6.20
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+Contact: Thomas Maier <balagi@justmail.de>
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+Description:
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+ size: (RO) Contains the size of the bio write queue.
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+
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+ congestion_off: (RW) If bio write queue size is below this mark,
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+ accept new bio requests from the block layer.
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-The pktcdvd module (packet writing driver) creates
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-these files in the sysfs:
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-(<devid> is in format major:minor )
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-
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-/sys/class/pktcdvd/
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- add (0200) Write a block device id (major:minor)
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- to create a new pktcdvd device and map
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- it to the block device.
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-
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- remove (0200) Write the pktcdvd device id (major:minor)
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- to it to remove the pktcdvd device.
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-
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- device_map (0444) Shows the device mapping in format:
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- pktcdvd[0-7] <pktdevid> <blkdevid>
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-
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-/sys/class/pktcdvd/pktcdvd[0-7]/
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- dev (0444) Device id
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- uevent (0200) To send an uevent.
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-
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-/sys/class/pktcdvd/pktcdvd[0-7]/stat/
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- packets_started (0444) Number of started packets.
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- packets_finished (0444) Number of finished packets.
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-
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- kb_written (0444) kBytes written.
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- kb_read (0444) kBytes read.
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- kb_read_gather (0444) kBytes read to fill write packets.
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-
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- reset (0200) Write any value to it to reset
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- pktcdvd device statistic values, like
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- bytes read/written.
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-
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-/sys/class/pktcdvd/pktcdvd[0-7]/write_queue/
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- size (0444) Contains the size of the bio write
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- queue.
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-
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- congestion_off (0644) If bio write queue size is below
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- this mark, accept new bio requests
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- from the block layer.
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-
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- congestion_on (0644) If bio write queue size is higher
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- as this mark, do no longer accept
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- bio write requests from the block
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- layer and wait till the pktcdvd
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- device has processed enough bio's
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- so that bio write queue size is
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- below congestion off mark.
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- A value of <= 0 disables congestion
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- control.
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+ congestion_on: (RW) If bio write queue size is higher as this
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+ mark, do no longer accept bio write requests
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+ from the block layer and wait till the pktcdvd
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+ device has processed enough bio's so that bio
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+ write queue size is below congestion off mark.
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+ A value of <= 0 disables congestion control.
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Example:
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Example:
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