From patchwork Tue Apr 26 07:29:20 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Artem Bityutskiy X-Patchwork-Id: 92867 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id F32E2B6F3E for ; Tue, 26 Apr 2011 17:27:34 +1000 (EST) Received: from canuck.infradead.org ([2001:4978:20e::1]) by bombadil.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1QEcf1-0007R5-Ni; Tue, 26 Apr 2011 07:26:15 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.72 #1 (Red Hat Linux)) id 1QEcf0-00073Z-5x; Tue, 26 Apr 2011 07:26:14 +0000 Received: from smtp.nokia.com ([147.243.1.47] helo=mgw-sa01.nokia.com) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1QEced-00071J-KZ for linux-mtd@lists.infradead.org; Tue, 26 Apr 2011 07:25:54 +0000 Received: from nokia.com (localhost [127.0.0.1]) by mgw-sa01.nokia.com (Switch-3.4.3/Switch-3.4.3) with ESMTP id p3Q7PmNA010174 for ; Tue, 26 Apr 2011 10:25:48 +0300 Received: from eru.research.nokia.com ([[172.21.24.121]]) by mgw-sa01.nokia.com with ESMTP id p3Q7PePT010082 ; Tue, 26 Apr 2011 10:25:41 +0300 From: Artem Bityutskiy To: MTD list Subject: [PATCH 1/4] UBIFS: remove duplicated code Date: Tue, 26 Apr 2011 10:29:20 +0300 Message-Id: <1303802963-31612-1-git-send-email-dedekind1@gmail.com> X-Mailer: git-send-email 1.7.2.3 X-Nokia-AV: Clean X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110426_032552_085641_D476ADBC X-CRM114-Status: GOOD ( 14.12 ) X-Spam-Score: 3.4 (+++) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (3.4 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, low trust [147.243.1.47 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is freemail (dedekind1[at]gmail.com) 0.0 DKIM_ADSP_CUSTOM_MED No valid author signature, adsp_override is CUSTOM_MED 2.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (dedekind1[at]gmail.com) 0.0 RFC_ABUSE_POST Both abuse and postmaster missing on sender domain 1.2 NML_ADSP_CUSTOM_MED ADSP custom_med hit, and not from a mailing list Cc: Adrian Hunter X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Artem Bityutskiy We have duplicated code in 'ubifs_garbage_collect()' and 'ubifs_rcvry_gc_commit()', which is about handling the special case of free LEB. In both cases we just want to garbage-collect the LEB using 'ubifs_garbage_collect_leb()'. This patch teaches 'ubifs_garbage_collect_leb()' to handle free LEB's so that the caller does not have to do this and the duplicated code is removed. Signed-off-by: Artem Bityutskiy --- fs/ubifs/gc.c | 62 +++++++++++++++++++++++++------------------------- fs/ubifs/recovery.c | 19 +-------------- 2 files changed, 33 insertions(+), 48 deletions(-) diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c index 151f108..082d21b 100644 --- a/fs/ubifs/gc.c +++ b/fs/ubifs/gc.c @@ -473,6 +473,37 @@ int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp) ubifs_assert(c->gc_lnum != lnum); ubifs_assert(wbuf->lnum != lnum); + if (lp->free + lp->dirty == c->leb_size) { + /* Special case - a free LEB */ + dbg_gc("LEB %d is free, return it", lp->lnum); + ubifs_assert(!(lp->flags & LPROPS_INDEX)); + + if (lp->free != c->leb_size) { + /* + * Write buffers must be sync'd before unmapping + * freeable LEBs, because one of them may contain data + * which obsoletes something in 'lp->pnum'. + */ + err = gc_sync_wbufs(c); + if (err) + return err; + err = ubifs_change_one_lp(c, lp->lnum, c->leb_size, + 0, 0, 0, 0); + if (err) + return err; + } + err = ubifs_leb_unmap(c, lp->lnum); + if (err) + return err; + + if (c->gc_lnum == -1) { + c->gc_lnum = lnum; + return LEB_RETAINED; + } + + return LEB_FREED; + } + /* * We scan the entire LEB even though we only really need to scan up to * (c->leb_size - lp->free). @@ -682,37 +713,6 @@ int ubifs_garbage_collect(struct ubifs_info *c, int anyway) "(min. space %d)", lp.lnum, lp.free, lp.dirty, lp.free + lp.dirty, min_space); - if (lp.free + lp.dirty == c->leb_size) { - /* An empty LEB was returned */ - dbg_gc("LEB %d is free, return it", lp.lnum); - /* - * ubifs_find_dirty_leb() doesn't return freeable index - * LEBs. - */ - ubifs_assert(!(lp.flags & LPROPS_INDEX)); - if (lp.free != c->leb_size) { - /* - * Write buffers must be sync'd before - * unmapping freeable LEBs, because one of them - * may contain data which obsoletes something - * in 'lp.pnum'. - */ - ret = gc_sync_wbufs(c); - if (ret) - goto out; - ret = ubifs_change_one_lp(c, lp.lnum, - c->leb_size, 0, 0, 0, - 0); - if (ret) - goto out; - } - ret = ubifs_leb_unmap(c, lp.lnum); - if (ret) - goto out; - ret = lp.lnum; - break; - } - space_before = c->leb_size - wbuf->offs - wbuf->used; if (wbuf->lnum == -1) space_before = 0; diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c index 3dbad6f..1a72046 100644 --- a/fs/ubifs/recovery.c +++ b/fs/ubifs/recovery.c @@ -1125,25 +1125,10 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c) } return err; } + ubifs_assert(!(lp.flags & LPROPS_INDEX)); lnum = lp.lnum; - if (lp.free + lp.dirty == c->leb_size) { - /* An empty LEB was returned */ - if (lp.free != c->leb_size) { - err = ubifs_change_one_lp(c, lnum, c->leb_size, - 0, 0, 0, 0); - if (err) - return err; - } - err = ubifs_leb_unmap(c, lnum); - if (err) - return err; - c->gc_lnum = lnum; - dbg_rcvry("allocated LEB %d for GC", lnum); - /* Run the commit */ - dbg_rcvry("committing"); - return ubifs_run_commit(c); - } + /* * There was no empty LEB so the used space in the dirtiest LEB must fit * in the GC head LEB.