From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754938AbbLYHSY (ORCPT ); Fri, 25 Dec 2015 02:18:24 -0500 Received: from victor.provo.novell.com ([137.65.250.26]:48663 "EHLO prv3-mh.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753967AbbLYHRK (ORCPT ); Fri, 25 Dec 2015 02:17:10 -0500 From: Gang He To: mfasheh@suse.com, rgoldwyn@suse.de, ghe@suse.com Cc: linux-kernel@vger.kernel.org, ocfs2-devel@oss.oracle.com, akpm@linux-foundation.org Subject: [PATCH v3 4/4] ocfs2: check/fix inode block for online file check Date: Fri, 25 Dec 2015 15:16:19 +0800 Message-Id: <1451027779-6849-5-git-send-email-ghe@suse.com> X-Mailer: git-send-email 2.1.2 In-Reply-To: <1451027779-6849-1-git-send-email-ghe@suse.com> References: <1451027779-6849-1-git-send-email-ghe@suse.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implement online check or fix inode block during reading a inode block to memory. Signed-off-by: Gang He --- fs/ocfs2/inode.c | 200 +++++++++++++++++++++++++++++++++++++++++++++++-- fs/ocfs2/ocfs2_trace.h | 2 + 2 files changed, 196 insertions(+), 6 deletions(-) diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c index 8f87e05..6ac2f19 100644 --- a/fs/ocfs2/inode.c +++ b/fs/ocfs2/inode.c @@ -53,6 +53,7 @@ #include "xattr.h" #include "refcounttree.h" #include "ocfs2_trace.h" +#include "filecheck.h" #include "buffer_head_io.h" @@ -74,6 +75,14 @@ static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, struct inode *inode, struct buffer_head *fe_bh); +static int ocfs2_filecheck_read_inode_block_full(struct inode *inode, + struct buffer_head **bh, + int flags, int type); +static int ocfs2_filecheck_validate_inode_block(struct super_block *sb, + struct buffer_head *bh); +static int ocfs2_filecheck_repair_inode_block(struct super_block *sb, + struct buffer_head *bh); + void ocfs2_set_inode_flags(struct inode *inode) { unsigned int flags = OCFS2_I(inode)->ip_attr; @@ -127,6 +136,7 @@ struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno) struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags, int sysfile_type) { + int rc = 0; struct inode *inode = NULL; struct super_block *sb = osb->sb; struct ocfs2_find_inode_args args; @@ -161,12 +171,17 @@ struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags, } trace_ocfs2_iget5_locked(inode->i_state); if (inode->i_state & I_NEW) { - ocfs2_read_locked_inode(inode, &args); + rc = ocfs2_read_locked_inode(inode, &args); unlock_new_inode(inode); } if (is_bad_inode(inode)) { iput(inode); - inode = ERR_PTR(-ESTALE); + if ((flags & OCFS2_FI_FLAG_FILECHECK_CHK) || + (flags & OCFS2_FI_FLAG_FILECHECK_FIX)) + /* Return OCFS2_FILECHECK_ERR_XXX related errno */ + inode = ERR_PTR(rc); + else + inode = ERR_PTR(-ESTALE); goto bail; } @@ -494,16 +509,32 @@ static int ocfs2_read_locked_inode(struct inode *inode, } if (can_lock) { - status = ocfs2_read_inode_block_full(inode, &bh, - OCFS2_BH_IGNORE_CACHE); + if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK) + status = ocfs2_filecheck_read_inode_block_full(inode, + &bh, OCFS2_BH_IGNORE_CACHE, 0); + else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX) + status = ocfs2_filecheck_read_inode_block_full(inode, + &bh, OCFS2_BH_IGNORE_CACHE, 1); + else + status = ocfs2_read_inode_block_full(inode, + &bh, OCFS2_BH_IGNORE_CACHE); } else { status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh); /* * If buffer is in jbd, then its checksum may not have been * computed as yet. */ - if (!status && !buffer_jbd(bh)) - status = ocfs2_validate_inode_block(osb->sb, bh); + if (!status && !buffer_jbd(bh)) { + if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK) + status = ocfs2_filecheck_validate_inode_block( + osb->sb, bh); + else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX) + status = ocfs2_filecheck_repair_inode_block( + osb->sb, bh); + else + status = ocfs2_validate_inode_block( + osb->sb, bh); + } } if (status < 0) { mlog_errno(status); @@ -531,6 +562,14 @@ static int ocfs2_read_locked_inode(struct inode *inode, BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno)); + if (buffer_dirty(bh)) { + status = ocfs2_write_block(osb, bh, INODE_CACHE(inode)); + if (status < 0) { + mlog_errno(status); + goto bail; + } + } + status = 0; bail: @@ -1396,6 +1435,155 @@ bail: return rc; } +static int ocfs2_filecheck_validate_inode_block(struct super_block *sb, + struct buffer_head *bh) +{ + int rc = 0; + struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; + + trace_ocfs2_filecheck_validate_inode_block( + (unsigned long long)bh->b_blocknr); + + BUG_ON(!buffer_uptodate(bh)); + + rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check); + if (rc) { + mlog(ML_ERROR, + "Filecheck: checksum failed for dinode %llu\n", + (unsigned long long)bh->b_blocknr); + rc = -OCFS2_FILECHECK_ERR_BLOCKECC; + goto bail; + } + + if (!OCFS2_IS_VALID_DINODE(di)) { + mlog(ML_ERROR, + "Filecheck: invalid dinode #%llu: signature = %.*s\n", + (unsigned long long)bh->b_blocknr, 7, di->i_signature); + rc = -OCFS2_FILECHECK_ERR_INVALIDINO; + goto bail; + } + + if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) { + mlog(ML_ERROR, + "Filecheck: invalid dinode #%llu: i_blkno is %llu\n", + (unsigned long long)bh->b_blocknr, + (unsigned long long)le64_to_cpu(di->i_blkno)); + rc = -OCFS2_FILECHECK_ERR_BLOCKNO; + goto bail; + } + + if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) { + mlog(ML_ERROR, + "Filecheck: invalid dinode #%llu: OCFS2_VALID_FL " + "not set\n", + (unsigned long long)bh->b_blocknr); + rc = -OCFS2_FILECHECK_ERR_VALIDFLAG; + goto bail; + } + + if (le32_to_cpu(di->i_fs_generation) != + OCFS2_SB(sb)->fs_generation) { + mlog(ML_ERROR, + "Filecheck: invalid dinode #%llu: fs_generation is %u\n", + (unsigned long long)bh->b_blocknr, + le32_to_cpu(di->i_fs_generation)); + rc = -OCFS2_FILECHECK_ERR_GENERATION; + goto bail; + } + +bail: + return rc; +} + +static int ocfs2_filecheck_repair_inode_block(struct super_block *sb, + struct buffer_head *bh) +{ + int changed = 0; + struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; + + if (!ocfs2_filecheck_validate_inode_block(sb, bh)) + return 0; + + trace_ocfs2_filecheck_repair_inode_block( + (unsigned long long)bh->b_blocknr); + + if (ocfs2_is_hard_readonly(OCFS2_SB(sb)) || + ocfs2_is_soft_readonly(OCFS2_SB(sb))) { + mlog(ML_ERROR, + "Filecheck: cannot repair dinode #%llu " + "on readonly filesystem\n", + (unsigned long long)bh->b_blocknr); + return -OCFS2_FILECHECK_ERR_READONLY; + } + + if (!OCFS2_IS_VALID_DINODE(di)) { + /* Cannot fix invalid inode block */ + return -OCFS2_FILECHECK_ERR_INVALIDINO; + } + + if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) { + /* Cannot just add VALID_FL flag back as a fix, + * need more things to check here. + */ + return -OCFS2_FILECHECK_ERR_VALIDFLAG; + } + + if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) { + di->i_blkno = cpu_to_le64(bh->b_blocknr); + changed = 1; + mlog(ML_ERROR, + "Filecheck: reset dinode #%llu: i_blkno to %llu\n", + (unsigned long long)bh->b_blocknr, + (unsigned long long)le64_to_cpu(di->i_blkno)); + } + + if (le32_to_cpu(di->i_fs_generation) != + OCFS2_SB(sb)->fs_generation) { + di->i_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); + changed = 1; + mlog(ML_ERROR, + "Filecheck: reset dinode #%llu: fs_generation to %u\n", + (unsigned long long)bh->b_blocknr, + le32_to_cpu(di->i_fs_generation)); + } + + if (changed || ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check)) { + ocfs2_compute_meta_ecc(sb, bh->b_data, &di->i_check); + mark_buffer_dirty(bh); + mlog(ML_ERROR, + "Filecheck: reset dinode #%llu: compute meta ecc\n", + (unsigned long long)bh->b_blocknr); + } + + return 0; +} + +static int +ocfs2_filecheck_read_inode_block_full(struct inode *inode, + struct buffer_head **bh, + int flags, int type) +{ + int rc; + struct buffer_head *tmp = *bh; + + if (!type) /* Check inode block */ + rc = ocfs2_read_blocks(INODE_CACHE(inode), + OCFS2_I(inode)->ip_blkno, + 1, &tmp, flags, + ocfs2_filecheck_validate_inode_block); + else /* Repair inode block */ + rc = ocfs2_read_blocks(INODE_CACHE(inode), + OCFS2_I(inode)->ip_blkno, + 1, &tmp, flags, + ocfs2_filecheck_repair_inode_block); + + /* If ocfs2_read_blocks() got us a new bh, pass it up. */ + if (!rc && !*bh) + *bh = tmp; + + return rc; +} + int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh, int flags) { diff --git a/fs/ocfs2/ocfs2_trace.h b/fs/ocfs2/ocfs2_trace.h index 6cb019b..d9205e0 100644 --- a/fs/ocfs2/ocfs2_trace.h +++ b/fs/ocfs2/ocfs2_trace.h @@ -1540,6 +1540,8 @@ DEFINE_OCFS2_ULL_INT_EVENT(ocfs2_read_locked_inode); DEFINE_OCFS2_INT_INT_EVENT(ocfs2_check_orphan_recovery_state); DEFINE_OCFS2_ULL_EVENT(ocfs2_validate_inode_block); +DEFINE_OCFS2_ULL_EVENT(ocfs2_filecheck_validate_inode_block); +DEFINE_OCFS2_ULL_EVENT(ocfs2_filecheck_repair_inode_block); TRACE_EVENT(ocfs2_inode_is_valid_to_delete, TP_PROTO(void *task, void *dc_task, unsigned long long ino, -- 2.1.2