On 2/27/20 5:58 PM, Douglas Gilbert wrote:
Remove the fixed size array of 16 request elements per file descriptor and replace with the xarray added in the previous patch. All sg_request objects are now kept, available for re-use, until their owning file descriptor is closed. The sg_request deletions are in sg_remove_sfp_usercontext(). Each active sg_request object has an associated block request and a scsi_request object but they have different lifetimes. The block request and the scsi_request object are released much earlier; their lifetime is the same as it was in the v3 sg driver. The lifetime of the bio is also the same (but is stretched in a later patch). Collect various flags into bit maps: one for requests (SG_FRQ_*) and the other for file descriptors (SG_FFD_*). They join a per sg_device bit map (SG_FDEV_*) added in an earlier patch. Prior to a new sg_request object being (re-)built, information that will be placed in it uses a new struct sg_comm_wr_t object. Since the above changes touch almost every function and low level structures, this patch is big. Signed-off-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx> --- drivers/scsi/sg.c | 1568 +++++++++++++++++++++++++++++---------------- 1 file changed, 1008 insertions(+), 560 deletions(-) Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@xxxxxxx +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
