From patchwork Fri May 6 14:15:12 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Artem Bityutskiy X-Patchwork-Id: 94393 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 151F1B6FCA for ; Sat, 7 May 2011 00:13:28 +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 1QILlO-0005LP-KE; Fri, 06 May 2011 14:12:14 +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 1QILlN-0008CD-2m; Fri, 06 May 2011 14:12:13 +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 1QILkx-00089J-1N for linux-mtd@lists.infradead.org; Fri, 06 May 2011 14:11:50 +0000 Received: from nokia.com (localhost [127.0.0.1]) by mgw-sa01.nokia.com (Switch-3.4.4/Switch-3.4.3) with ESMTP id p46EBiFl000678 for ; Fri, 6 May 2011 17:11:45 +0300 Received: from eru.research.nokia.com ([[172.21.24.121]]) by mgw-sa01.nokia.com with ESMTP id p46EBNa3032736 ; Fri, 6 May 2011 17:11:24 +0300 From: Artem Bityutskiy To: MTD list Subject: [PATCH 2/7] UBIFS: refactor ubifs_rcvry_gc_commit Date: Fri, 6 May 2011 17:15:12 +0300 Message-Id: <1304691317-32214-2-git-send-email-dedekind1@gmail.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1304691317-32214-1-git-send-email-dedekind1@gmail.com> References: <1304691317-32214-1-git-send-email-dedekind1@gmail.com> X-Nokia-AV: Clean X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110506_101147_572676_9B4AE850 X-CRM114-Status: GOOD ( 20.93 ) 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 This commits refactors and cleans up 'ubifs_rcvry_gc_commit()' which was quite untidy, also removes the commentary which was not 100% correct. Signed-off-by: Artem Bityutskiy --- fs/ubifs/recovery.c | 55 ++++++++++++++++---------------------------------- 1 files changed, 18 insertions(+), 37 deletions(-) diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c index 11776ae..d28db1e 100644 --- a/fs/ubifs/recovery.c +++ b/fs/ubifs/recovery.c @@ -1138,44 +1138,26 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c) { struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf; struct ubifs_lprops lp; - int lnum, err; + int err; c->gc_lnum = -1; - if (wbuf->lnum == -1) { - dbg_rcvry("no GC head LEB"); - return grab_empty_leb(c); - } - /* - * See whether the used space in the dirtiest LEB fits in the GC head - * LEB. - */ - if (wbuf->offs == c->leb_size) { - dbg_rcvry("no room in GC head LEB"); + if (wbuf->lnum == -1 || wbuf->offs == c->leb_size) { + dbg_rcvry("no GC head: wbuf->lnum %d, wbuf->offs %d", + wbuf->lnum, wbuf->offs); return grab_empty_leb(c); } + err = ubifs_find_dirty_leb(c, &lp, wbuf->offs, 2); if (err) { - /* - * There are no dirty or empty LEBs subject to here being - * enough for the index. Try to use - * 'ubifs_find_free_leb_for_idx()', which will return any empty - * LEBs (ignoring index requirements). If the index then - * doesn't have enough LEBs the recovery commit will fail - - * which is the same result anyway i.e. recovery fails. So - * there is no problem ignoring index requirements and just - * grabbing a free LEB since we have already established there - * is not a dirty LEB we could have used instead. - */ - if (err == -ENOSPC) { - dbg_rcvry("could not find a dirty LEB"); - return grab_empty_leb(c); - } - return err; + if (err != -ENOSPC) + return err; + + dbg_rcvry("could not find a dirty LEB"); + return grab_empty_leb(c); } ubifs_assert(!(lp.flags & LPROPS_INDEX)); ubifs_assert(lp.free + lp.dirty >= wbuf->offs); - lnum = lp.lnum; /* * We run the commit before garbage collection otherwise subsequent @@ -1185,11 +1167,8 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c) err = ubifs_run_commit(c); if (err) return err; - /* - * The data in the dirtiest LEB fits in the GC head LEB, so do the GC - * - use locking to keep 'ubifs_assert()' happy. - */ - dbg_rcvry("GC'ing LEB %d", lnum); + + dbg_rcvry("GC'ing LEB %d", lp.lnum); mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead); err = ubifs_garbage_collect_leb(c, &lp); if (err >= 0) { @@ -1205,14 +1184,16 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c) err = -EINVAL; return err; } - if (err != LEB_RETAINED) { - dbg_err("GC returned %d", err); + + ubifs_assert(err == LEB_RETAINED); + if (err != LEB_RETAINED) return -EINVAL; - } + err = ubifs_leb_unmap(c, c->gc_lnum); if (err) return err; - dbg_rcvry("allocated LEB %d for GC", lnum); + + dbg_rcvry("allocated LEB %d for GC", lp.lnum); return 0; }