linux-kernel - Re: [PATCH 3/3] tcm/fileio: Add UNMAP / Block DISCARD support

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Date:	Tue, 28 Sep 2010 23:06:22 +0200
From:	Rolf Eike Beer <eike-kernel@...tec.de>
To:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
Cc:	"linux-scsi" <linux-scsi@...r.kernel.org>,
	"linux-kernel" <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Douglas Gilbert <dgilbert@...erlog.com>,
	Jens Axboe <axboe@...nel.dk>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Mike Christie <michaelc@...wisc.edu>,
	Hannes Reinecke <hare@...e.de>,
	James Bottomley <James.Bottomley@...e.de>,
	Konrad Rzeszutek Wilk <konrad@...nok.org>,
	Boaz Harrosh <bharrosh@...asas.com>,
	Richard Sharpe <realrichardsharpe@...il.com>
Subject: Re: [PATCH 3/3] tcm/fileio: Add UNMAP / Block DISCARD support

Nicholas A. Bellinger wrote:

> @@ -433,6 +448,42 @@ static int fd_emulate_scsi_cdb(struct se_task *task)
>  		if (ret < 0)
>  			return ret;
>  		break;
> +	case UNMAP:
> +		i = igrab(f->f_mapping->host);
> +		if (!(i)) {

.....

> +		if (!(S_ISBLK(i->i_mode))) {

.....

> +		if (!(bd)) {

Is this LISP or what? ;)

Eike

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