From patchwork Wed May 12 13:46:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 435726 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FBBAC4361A for ; Wed, 12 May 2021 13:46:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 357C461040 for ; Wed, 12 May 2021 13:46:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231488AbhELNr4 (ORCPT ); Wed, 12 May 2021 09:47:56 -0400 Received: from mx2.suse.de ([195.135.220.15]:41856 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231211AbhELNrp (ORCPT ); Wed, 12 May 2021 09:47:45 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id E48A3B1BE; Wed, 12 May 2021 13:46:32 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id 014611F2B62; Wed, 12 May 2021 15:46:31 +0200 (CEST) From: Jan Kara To: Cc: Christoph Hellwig , Dave Chinner , ceph-devel@vger.kernel.org, Chao Yu , Damien Le Moal , "Darrick J. Wong" , Jaegeuk Kim , Jeff Layton , Johannes Thumshirn , linux-cifs@vger.kernel.org, , linux-f2fs-devel@lists.sourceforge.net, , , Miklos Szeredi , Steve French , Ted Tso , Matthew Wilcox , Jan Kara Subject: [PATCH 08/11] f2fs: Convert to using invalidate_lock Date: Wed, 12 May 2021 15:46:16 +0200 Message-Id: <20210512134631.4053-8-jack@suse.cz> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210512101639.22278-1-jack@suse.cz> References: <20210512101639.22278-1-jack@suse.cz> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Use invalidate_lock instead of f2fs' private i_mmap_sem. The intended purpose is exactly the same. By this conversion we fix a long standing race between hole punching and read(2) / readahead(2) paths that can lead to stale page cache contents. CC: Jaegeuk Kim CC: Chao Yu CC: linux-f2fs-devel@lists.sourceforge.net Signed-off-by: Jan Kara Reported-by: kernel test robot --- fs/f2fs/data.c | 4 ++-- fs/f2fs/f2fs.h | 1 - fs/f2fs/file.c | 58 ++++++++++++++++++++++++------------------------- fs/f2fs/super.c | 1 - 4 files changed, 30 insertions(+), 34 deletions(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 96f1a354f89f..f3177d03c28f 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -3165,12 +3165,12 @@ static void f2fs_write_failed(struct address_space *mapping, loff_t to) /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */ if (to > i_size && !f2fs_verity_in_progress(inode)) { down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); truncate_pagecache(inode, i_size); f2fs_truncate_blocks(inode, i_size, true); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); } } diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 044878866ca3..1f887c906aaf 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -748,7 +748,6 @@ struct f2fs_inode_info { /* avoid racing between foreground op and gc */ struct rw_semaphore i_gc_rwsem[2]; - struct rw_semaphore i_mmap_sem; struct rw_semaphore i_xattr_sem; /* avoid racing between reading and changing EAs */ int i_extra_isize; /* size of extra space located in i_addr */ diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 44a4650aea7b..6602f3c653c4 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -38,10 +38,7 @@ static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf) struct inode *inode = file_inode(vmf->vma->vm_file); vm_fault_t ret; - down_read(&F2FS_I(inode)->i_mmap_sem); ret = filemap_fault(vmf); - up_read(&F2FS_I(inode)->i_mmap_sem); - if (!ret) f2fs_update_iostat(F2FS_I_SB(inode), APP_MAPPED_READ_IO, F2FS_BLKSIZE); @@ -102,7 +99,7 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf) f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); file_update_time(vmf->vma->vm_file); - down_read(&F2FS_I(inode)->i_mmap_sem); + down_read(&inode->i_mapping->invalidate_lock); lock_page(page); if (unlikely(page->mapping != inode->i_mapping || page_offset(page) > i_size_read(inode) || @@ -161,7 +158,7 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf) trace_f2fs_vm_page_mkwrite(page, DATA); out_sem: - up_read(&F2FS_I(inode)->i_mmap_sem); + up_read(&inode->i_mapping->invalidate_lock); sb_end_pagefault(inode->i_sb); err: @@ -942,7 +939,7 @@ int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, } down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&inode->i_mapping->invalidate_lock); truncate_setsize(inode, attr->ia_size); @@ -952,7 +949,7 @@ int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, * do not trim all blocks after i_size if target size is * larger than i_size. */ - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&inode->i_mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); if (err) return err; @@ -1097,7 +1094,7 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len) blk_end = (loff_t)pg_end << PAGE_SHIFT; down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); truncate_inode_pages_range(mapping, blk_start, blk_end - 1); @@ -1106,7 +1103,7 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len) ret = f2fs_truncate_hole(inode, pg_start, pg_end); f2fs_unlock_op(sbi); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); } } @@ -1341,7 +1338,7 @@ static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len) /* avoid gc operation during block exchange */ down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&inode->i_mapping->invalidate_lock); f2fs_lock_op(sbi); f2fs_drop_extent_tree(inode); @@ -1349,7 +1346,7 @@ static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len) ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true); f2fs_unlock_op(sbi); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&inode->i_mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); return ret; } @@ -1380,13 +1377,13 @@ static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) return ret; /* write out all moved pages, if possible */ - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&inode->i_mapping->invalidate_lock); filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); truncate_pagecache(inode, offset); new_size = i_size_read(inode) - len; ret = f2fs_truncate_blocks(inode, new_size, true); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&inode->i_mapping->invalidate_lock); if (!ret) f2fs_i_size_write(inode, new_size); return ret; @@ -1486,7 +1483,7 @@ static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, pgoff_t end; down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); truncate_pagecache_range(inode, (loff_t)index << PAGE_SHIFT, @@ -1498,7 +1495,7 @@ static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE); if (ret) { f2fs_unlock_op(sbi); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); goto out; } @@ -1510,7 +1507,7 @@ static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, f2fs_put_dnode(&dn); f2fs_unlock_op(sbi); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); f2fs_balance_fs(sbi, dn.node_changed); @@ -1545,6 +1542,7 @@ static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct address_space *mapping = inode->i_mapping; pgoff_t nr, pg_start, pg_end, delta, idx; loff_t new_size; int ret = 0; @@ -1567,14 +1565,14 @@ static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) f2fs_balance_fs(sbi, true); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); ret = f2fs_truncate_blocks(inode, i_size_read(inode), true); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); if (ret) return ret; /* write out all dirty pages from offset */ - ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); + ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX); if (ret) return ret; @@ -1585,7 +1583,7 @@ static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) /* avoid gc operation during block exchange */ down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); truncate_pagecache(inode, offset); while (!ret && idx > pg_start) { @@ -1601,14 +1599,14 @@ static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) idx + delta, nr, false); f2fs_unlock_op(sbi); } - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); /* write out all moved pages, if possible */ - down_write(&F2FS_I(inode)->i_mmap_sem); - filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); + down_write(&mapping->invalidate_lock); + filemap_write_and_wait_range(mapping, offset, LLONG_MAX); truncate_pagecache(inode, offset); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); if (!ret) f2fs_i_size_write(inode, new_size); @@ -3442,7 +3440,7 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) goto out; down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&inode->i_mapping->invalidate_lock); last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); @@ -3478,7 +3476,7 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) } up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&inode->i_mapping->invalidate_lock); out: inode_unlock(inode); @@ -3595,7 +3593,7 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) } down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&inode->i_mapping->invalidate_lock); last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); @@ -3631,7 +3629,7 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) } up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&inode->i_mapping->invalidate_lock); if (ret >= 0) { F2FS_I(inode)->i_flags &= ~F2FS_IMMUTABLE_FL; @@ -3751,7 +3749,7 @@ static int f2fs_sec_trim_file(struct file *filp, unsigned long arg) goto err; down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - down_write(&F2FS_I(inode)->i_mmap_sem); + down_write(&mapping->invalidate_lock); ret = filemap_write_and_wait_range(mapping, range.start, to_end ? LLONG_MAX : end_addr - 1); @@ -3838,7 +3836,7 @@ static int f2fs_sec_trim_file(struct file *filp, unsigned long arg) ret = f2fs_secure_erase(prev_bdev, inode, prev_index, prev_block, len, range.flags); out: - up_write(&F2FS_I(inode)->i_mmap_sem); + up_write(&mapping->invalidate_lock); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); err: inode_unlock(inode); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 7d325bfaf65a..22e942aac7ad 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1187,7 +1187,6 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb) mutex_init(&fi->inmem_lock); init_rwsem(&fi->i_gc_rwsem[READ]); init_rwsem(&fi->i_gc_rwsem[WRITE]); - init_rwsem(&fi->i_mmap_sem); init_rwsem(&fi->i_xattr_sem); /* Will be used by directory only */