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When the devscan opens the fc device then it will send ioctl (SCIOLSTART) to fc device and before closing the fc device devscan sends ioctl (SCIOLSTOP) to device in normal case.
when the devscan terminates abnormally, then kernel will close the device(s) opened by the devscan.
Incase if it?s not a last close (some other processes has also opened the device) on the fc device then close will not be sent to the device and no cleanup will be done. Hence cfgmgr will fail. If device was not already opened then this problem would not be there as close will reach to device. This is a special case where a root privileged command (devscan) is used to open device and did not do cleanup. One other way to recover from this situation is to close device completely (all the process those have opened the device to close)
if it?s a last close on the fc device then fc close will take care of SCIOLSTOP on the fc device. Hence cfgmgr will success.
NOTE: specfs increments the open counts of a device when the device is opened and decrements it when the device is closed (i.e. open counts for devices are maintained by specfs). specfs calls the device close only for the last close on the device.
Hello,
This idea is set to Status "Needs more information", however I do not see another question posted. What information is needed so I can gather it ?
Thank you and have a good day!
Can you please provide us the steps to recreate the issue and let us know how that led to the request of track all opens in AIX Kernel
Thank you.
are there any update on this.
AIX has a command line tool fuser that lists processes using specified file. Would it suffice for the purpose?