From patchwork Fri Jun 7 04:26:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhihao Cheng X-Patchwork-Id: 1944936 X-Patchwork-Delegate: david.oberhollenzer@sigma-star.at Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=Si1uSw0Z; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=patchwork.ozlabs.org) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4VwVb432jkz20QJ for ; Fri, 7 Jun 2024 15:47:28 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fdVRHbTcx2mKDZiL0zocKayZqT8BTDNMggi8cjyNQ1I=; b=Si1uSw0Z4yTNzO YR9E421nkB76MpWduF2/sRVehuCFm4Lwo+BXDrxtLfmyUxnmg01hRlJIdLQ1fqYdeg0BXhpVsQqOZ 0j1MvyulrqCZJK31ScXyY+MbiA4hF4P1g8RvcRKVxR9R0FTjW3gYWJYA28YtdHrTuJFJnSX60wJCF eStorlBCf/Pe7lSy20Viy0nsti2awW+7VKnvjBUdKFshB4zC49BPmNWlIK/5yQweS2EIiA6hKp1tC F24owJKbUZlgf7ELeg4LDQUi0LAdbbse652CKQeYEDrBRsAWifGTcZ7Uoei3MqIopdeS1dI2DPeYv sCouH9/wh3Kcu0WtTlWg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sFSRb-0000000CYY6-1VW7; Fri, 07 Jun 2024 05:47:19 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sFRDe-0000000CHnW-3yOi for linux-mtd@lists.infradead.org; Fri, 07 Jun 2024 04:29:21 +0000 Received: from mail.maildlp.com (unknown [172.19.88.105]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4VwSlk1VznzwS3S; Fri, 7 Jun 2024 12:24:50 +0800 (CST) Received: from kwepemm600013.china.huawei.com (unknown [7.193.23.68]) by mail.maildlp.com (Postfix) with ESMTPS id 24444140413; Fri, 7 Jun 2024 12:28:34 +0800 (CST) Received: from huawei.com (10.175.104.67) by kwepemm600013.china.huawei.com (7.193.23.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 7 Jun 2024 12:27:37 +0800 From: Zhihao Cheng To: , , , , , CC: , Subject: [RFC PATCH mtd-utils 096/110] fsck.ubifs: Handle disconnected files Date: Fri, 7 Jun 2024 12:26:01 +0800 Message-ID: <20240607042615.2069840-97-chengzhihao1@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240607042615.2069840-1-chengzhihao1@huawei.com> References: <20240607042615.2069840-1-chengzhihao1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.104.67] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemm600013.china.huawei.com (7.193.23.68) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240606_212851_674577_0AA21C4A X-CRM114-Status: GOOD ( 21.23 ) X-Spam-Score: -2.3 (--) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: This is the 17/18 step of fsck. Recover disconnected files into lost+found. If there is no free space left to recover the disconnected files, fsck may delete the files to make filesystem be consistent [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [45.249.212.187 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H4 RBL: Very Good reputation (+4) [45.249.212.187 listed in wl.mailspike.net] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders -0.0 T_SCC_BODY_TEXT_LINE No description available. X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org This is the 17/18 step of fsck. Recover disconnected files into lost+found. If there is no free space left to recover the disconnected files, fsck may delete the files to make filesystem be consistent. Signed-off-by: Zhihao Cheng --- ubifs-utils/fsck.ubifs/fsck.ubifs.c | 8 ++ ubifs-utils/fsck.ubifs/fsck.ubifs.h | 3 +- ubifs-utils/fsck.ubifs/handle_disconnected.c | 107 +++++++++++++++++++++++++++ ubifs-utils/fsck.ubifs/problem.c | 10 +++ 4 files changed, 127 insertions(+), 1 deletion(-) diff --git a/ubifs-utils/fsck.ubifs/fsck.ubifs.c b/ubifs-utils/fsck.ubifs/fsck.ubifs.c index 0910676c..831a13db 100644 --- a/ubifs-utils/fsck.ubifs/fsck.ubifs.c +++ b/ubifs-utils/fsck.ubifs/fsck.ubifs.c @@ -541,6 +541,13 @@ static int do_fsck(void) goto free_disconnected_files_2; } + log_out(c, "Handle disconnected files"); + err = handle_disonnected_files(c); + if (err) { + exit_code |= FSCK_ERROR; + goto free_disconnected_files_2; + } + free_disconnected_files_2: destroy_file_list(c, &FSCK(c)->disconnected_files); return err; @@ -596,6 +603,7 @@ int main(int argc, char *argv[]) * Step 14: Check and correct the index size * Step 15: Check and create root dir * Step 16: Check and create lost+found + * Step 17: Handle disconnected files */ err = do_fsck(); if (err && FSCK(c)->try_rebuild) { diff --git a/ubifs-utils/fsck.ubifs/fsck.ubifs.h b/ubifs-utils/fsck.ubifs/fsck.ubifs.h index dc24e83c..84159430 100644 --- a/ubifs-utils/fsck.ubifs/fsck.ubifs.h +++ b/ubifs-utils/fsck.ubifs/fsck.ubifs.h @@ -46,7 +46,7 @@ enum { SB_CORRUPTED = 0, MST_CORRUPTED, LOG_CORRUPTED, BUD_CORRUPTED, FILE_ROOT_HAS_DENT, DENTRY_IS_UNREACHABLE, FILE_IS_INCONSISTENT, EMPTY_TNC, LPT_CORRUPTED, NNODE_INCORRECT, PNODE_INCORRECT, LP_INCORRECT, SPACE_STAT_INCORRECT, LTAB_INCORRECT, INCORRECT_IDX_SZ, - ROOT_DIR_NOT_FOUND }; + ROOT_DIR_NOT_FOUND, DISCONNECTED_FILE_CANNOT_BE_RECOVERED }; enum { HAS_DATA_CORRUPTED = 1, HAS_TNC_CORRUPTED = 2 }; @@ -388,5 +388,6 @@ int check_and_correct_index_size(struct ubifs_info *c); /* handle_disconnected.c */ int check_and_create_lost_found(struct ubifs_info *c); +int handle_disonnected_files(struct ubifs_info *c); #endif diff --git a/ubifs-utils/fsck.ubifs/handle_disconnected.c b/ubifs-utils/fsck.ubifs/handle_disconnected.c index b9a380f9..5ca00c0c 100644 --- a/ubifs-utils/fsck.ubifs/handle_disconnected.c +++ b/ubifs-utils/fsck.ubifs/handle_disconnected.c @@ -19,6 +19,7 @@ #include "fsck.ubifs.h" #define LOST_FOUND_DIR_NAME "lost+found" +#define MAX_REPEAT_NAME_RETRY_TIMES 10000000 /** * check_and_create_lost_found - Check and create the lost+found directory. @@ -87,3 +88,109 @@ free_root: kfree(root_ui); return err; } + +static int handle_disonnected_file(struct ubifs_info *c, + struct scanned_file *file) +{ + int err = 0; + + if (FSCK(c)->lost_and_found) { + unsigned int index = 0; + char file_name[UBIFS_MAX_NLEN + 1]; + struct fscrypt_name nm; + struct ubifs_inode *ui = NULL, *lost_found_ui = NULL; + + lost_found_ui = ubifs_lookup_by_inum(c, FSCK(c)->lost_and_found); + if (IS_ERR(lost_found_ui)) { + err = PTR_ERR(lost_found_ui); + ubifs_assert(c, err != -ENOENT); + return err; + } + ui = ubifs_lookup_by_inum(c, file->inum); + if (IS_ERR(ui)) { + err = PTR_ERR(ui); + ubifs_assert(c, err != -ENOENT); + goto free_lost_found_ui; + } + + while (index < MAX_REPEAT_NAME_RETRY_TIMES) { + struct ubifs_inode *target_ui; + + err = snprintf(file_name, sizeof(file_name), + "INO_%lu_%u", file->inum, index); + if (err < 0) + goto free_ui; + fname_name(&nm) = file_name; + fname_len(&nm) = strlen(file_name); + target_ui = ubifs_lookup(c, lost_found_ui, &nm); + if (IS_ERR(target_ui)) { + err = PTR_ERR(target_ui); + if (err == -ENOENT) + break; + goto free_ui; + } + kfree(target_ui); + index++; + } + + if (err != -ENOENT) { + err = 0; + kfree(ui); + kfree(lost_found_ui); + log_out(c, "Too many duplicated names(%u) in lost+found for inum %lu", + index, file->inum); + goto delete_file; + } + + /* Try to recover disconnected file into lost+found. */ + err = ubifs_link_recovery(c, lost_found_ui, ui, &nm); + if (err && err == -ENOSPC) { + err = 0; + log_out(c, "No free space to recover disconnected file"); + goto delete_file; + } + dbg_fsck("recover disconnected file %lu, in %s", + file->inum, c->dev_name); + +free_ui: + kfree(ui); +free_lost_found_ui: + kfree(lost_found_ui); + return err; + } else + log_out(c, "No valid lost+found"); + +delete_file: + if (fix_problem(c, DISCONNECTED_FILE_CANNOT_BE_RECOVERED, file)) + err = delete_file(c, file); + return err; +} + +/** + * handle_disonnected_files - Handle disconnected files. + * @c: UBIFS file-system description object + * + * This function tries to recover disonnected files into lost+found directory. + * If there is no free space left to recover the disconnected files, fsck may + * delete the files to make filesystem be consistent. Returns zero in case of + * success, a negative error code in case of failure. + */ +int handle_disonnected_files(struct ubifs_info *c) +{ + int err, ret = 0; + struct scanned_file *file; + + while (!list_empty(&FSCK(c)->disconnected_files)) { + file = list_entry(FSCK(c)->disconnected_files.next, + struct scanned_file, list); + + list_del(&file->list); + err = handle_disonnected_file(c, file); + if (err) + ret = ret ? ret : err; + destroy_file_content(c, file); + kfree(file); + } + + return ret; +} diff --git a/ubifs-utils/fsck.ubifs/problem.c b/ubifs-utils/fsck.ubifs/problem.c index 8e7e1e15..916c9762 100644 --- a/ubifs-utils/fsck.ubifs/problem.c +++ b/ubifs-utils/fsck.ubifs/problem.c @@ -69,6 +69,7 @@ static const struct fsck_problem problem_table[] = { {PROBLEM_FIXABLE | PROBLEM_MUST_FIX, "Inconsistent properties for lprops table"}, // LTAB_INCORRECT {PROBLEM_FIXABLE | PROBLEM_MUST_FIX, "Incorrect index size"}, // INCORRECT_IDX_SZ {PROBLEM_FIXABLE | PROBLEM_MUST_FIX, "Root dir is lost"}, // ROOT_DIR_NOT_FOUND + {PROBLEM_FIXABLE | PROBLEM_DROP_DATA, "Disconnected file cannot be recovered"}, // DISCONNECTED_FILE_CANNOT_BE_RECOVERED }; static const char *get_question(const struct fsck_problem *problem, @@ -96,6 +97,7 @@ static const char *get_question(const struct fsck_problem *problem, case FILE_HAS_NO_ENCRYPT: case FILE_ROOT_HAS_DENT: case DENTRY_IS_UNREACHABLE: + case DISCONNECTED_FILE_CANNOT_BE_RECOVERED: return "Delete it?"; case FILE_HAS_INCONSIST_TYPE: case FILE_HAS_TOO_MANY_DENT: @@ -292,6 +294,14 @@ static void print_problem(const struct ubifs_info *c, problem->desc, c->calc_idx_sz, *calc_sz); break; } + case DISCONNECTED_FILE_CANNOT_BE_RECOVERED: + { + const struct scanned_file *file = (const struct scanned_file *)priv; + + log_out(c, "problem: %s, ino %lu, size %llu", problem->desc, + file->inum, file->ino.size); + break; + } default: log_out(c, "problem: %s", problem->desc); break;