From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cn.fujitsu.com ([59.151.112.132]:49498 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752365AbcAGBIs (ORCPT ); Wed, 6 Jan 2016 20:08:48 -0500 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id 4BF224092565 for ; Thu, 7 Jan 2016 09:08:24 +0800 (CST) From: Qu Wenruo To: CC: Wang Xiaoguang Subject: [PATCH v3 09/16] btrfs: ordered-extent: Add support for dedup Date: Thu, 7 Jan 2016 09:08:10 +0800 Message-ID: <1452128897-5433-10-git-send-email-quwenruo@cn.fujitsu.com> In-Reply-To: <1452128897-5433-1-git-send-email-quwenruo@cn.fujitsu.com> References: <1452128897-5433-1-git-send-email-quwenruo@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-btrfs-owner@vger.kernel.org List-ID: From: Wang Xiaoguang Add ordered-extent support for dedup. Note, current ordered-extent support only supports non-compressed source extent. Support for compressed source extent will be added later. Signed-off-by: Qu Wenruo Signed-off-by: Wang Xiaoguang --- fs/btrfs/ordered-data.c | 33 +++++++++++++++++++++++++++++---- fs/btrfs/ordered-data.h | 13 +++++++++++++ 2 files changed, 42 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 8c27292..46493f5 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -25,6 +25,7 @@ #include "btrfs_inode.h" #include "extent_io.h" #include "disk-io.h" +#include "dedup.h" static struct kmem_cache *btrfs_ordered_extent_cache; @@ -183,12 +184,14 @@ static inline struct rb_node *tree_search(struct btrfs_ordered_inode_tree *tree, */ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, u64 start, u64 len, u64 disk_len, - int type, int dio, int compress_type) + int type, int dio, int compress_type, + struct btrfs_dedup_hash *hash) { struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_ordered_inode_tree *tree; struct rb_node *node; struct btrfs_ordered_extent *entry; + struct btrfs_dedup_info *dedup_info = root->fs_info->dedup_info; tree = &BTRFS_I(inode)->ordered_tree; entry = kmem_cache_zalloc(btrfs_ordered_extent_cache, GFP_NOFS); @@ -203,6 +206,20 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, entry->inode = igrab(inode); entry->compress_type = compress_type; entry->truncated_len = (u64)-1; + entry->hash = NULL; + if (hash && dedup_info) { + entry->hash = btrfs_dedup_alloc_hash(dedup_info->hash_type); + if (!entry->hash) { + kmem_cache_free(btrfs_ordered_extent_cache, entry); + return -ENOMEM; + } + /* Hash contains locks, only copy what we need */ + entry->hash->bytenr = hash->bytenr; + entry->hash->num_bytes = hash->num_bytes; + memcpy(entry->hash->hash, hash->hash, + btrfs_dedup_sizes[dedup_info->hash_type]); + } + if (type != BTRFS_ORDERED_IO_DONE && type != BTRFS_ORDERED_COMPLETE) set_bit(type, &entry->flags); @@ -249,15 +266,23 @@ int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, { return __btrfs_add_ordered_extent(inode, file_offset, start, len, disk_len, type, 0, - BTRFS_COMPRESS_NONE); + BTRFS_COMPRESS_NONE, NULL); } +int btrfs_add_ordered_extent_dedup(struct inode *inode, u64 file_offset, + u64 start, u64 len, u64 disk_len, int type, + struct btrfs_dedup_hash *hash) +{ + return __btrfs_add_ordered_extent(inode, file_offset, start, len, + disk_len, type, 0, + BTRFS_COMPRESS_NONE, hash); +} int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset, u64 start, u64 len, u64 disk_len, int type) { return __btrfs_add_ordered_extent(inode, file_offset, start, len, disk_len, type, 1, - BTRFS_COMPRESS_NONE); + BTRFS_COMPRESS_NONE, NULL); } int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset, @@ -266,7 +291,7 @@ int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset, { return __btrfs_add_ordered_extent(inode, file_offset, start, len, disk_len, type, 0, - compress_type); + compress_type, NULL); } /* diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index 23c9605..58519ce 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -139,6 +139,16 @@ struct btrfs_ordered_extent { struct completion completion; struct btrfs_work flush_work; struct list_head work_list; + + /* + * For inband deduplication + * If hash is NULL, no deduplication. + * If hash->bytenr is zero, means this is a dedup miss, hash will + * be added into dedup tree. + * If hash->bytenr is non-zero, this is a dedup hit. Extent ref is + * *ALREADY* increased. + */ + struct btrfs_dedup_hash *hash; }; /* @@ -172,6 +182,9 @@ int btrfs_dec_test_first_ordered_pending(struct inode *inode, int uptodate); int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, u64 start, u64 len, u64 disk_len, int type); +int btrfs_add_ordered_extent_dedup(struct inode *inode, u64 file_offset, + u64 start, u64 len, u64 disk_len, int type, + struct btrfs_dedup_hash *hash); int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset, u64 start, u64 len, u64 disk_len, int type); int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset, -- 2.6.4