Documentation/ABI: clean up sysfs-class-pktcdvd
Clean up the sysfs documentation such that it is in the same format as described in Documentation/ABI/README. Mainly, the patch moves the attribute names to the 'What:' field. This might be useful for scripting and tracking changes in the ABI. Signed-off-by: Aishwarya Pant <aishpant@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Aishwarya Pant
Jonathan Corbet
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@ -1,60 +1,81 @@
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What: /sys/class/pktcdvd/
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sysfs interface
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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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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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Date: Oct. 2006
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KernelVersion: 2.6.20
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KernelVersion: 2.6.20
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Contact: Thomas Maier <balagi@justmail.de>
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Contact: Thomas Maier <balagi@justmail.de>
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Description:
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Description:
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sysfs interface
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add: (WO) Write a block device id (major:minor) to
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---------------
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create a new pktcdvd device and map it to the
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block device.
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The pktcdvd module (packet writing driver) creates
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remove: (WO) Write the pktcdvd device id (major:minor)
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these files in the sysfs:
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to remove the pktcdvd device.
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(<devid> is in format major:minor )
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/sys/class/pktcdvd/
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device_map: (RO) Shows the device mapping in format:
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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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remove (0200) Write the pktcdvd device id (major:minor)
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to it to remove the pktcdvd device.
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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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pktcdvd[0-7] <pktdevid> <blkdevid>
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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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/sys/class/pktcdvd/pktcdvd[0-7]/stat/
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What: /sys/class/pktcdvd/pktcdvd[0-7]/dev
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packets_started (0444) Number of started packets.
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What: /sys/class/pktcdvd/pktcdvd[0-7]/uevent
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packets_finished (0444) Number of finished packets.
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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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kb_written (0444) kBytes written.
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uevent: (WO) To send a uevent
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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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reset (0200) Write any value to it to reset
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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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packets_finished: (RO) Number of finished packets.
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kb_written: (RO) kBytes written.
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kb_read: (RO) kBytes read.
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kb_read_gather: (RO) kBytes read to fill write packets.
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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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pktcdvd device statistic values, like
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bytes read/written.
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bytes read/written.
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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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congestion_off (0644) If bio write queue size is below
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What: /sys/class/pktcdvd/pktcdvd[0-7]/write_queue/size
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this mark, accept new bio requests
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What: /sys/class/pktcdvd/pktcdvd[0-7]/write_queue/congestion_off
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from the block layer.
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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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congestion_on (0644) If bio write queue size is higher
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congestion_off: (RW) If bio write queue size is below this mark,
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as this mark, do no longer accept
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accept new bio requests from the block layer.
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bio write requests from the block
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layer and wait till the pktcdvd
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congestion_on: (RW) If bio write queue size is higher as this
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device has processed enough bio's
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mark, do no longer accept bio write requests
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so that bio write queue size is
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from the block layer and wait till the pktcdvd
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below congestion off mark.
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device has processed enough bio's so that bio
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A value of <= 0 disables congestion
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write queue size is below congestion off mark.
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control.
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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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