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bh=6ReeJeOwpbhiEfhURT2cYsdi8myn0n3Tt43JRBAlL3I=; b=og/0yj7BlrmqQlW2CHtSZoF7pnSwBscPOcPEBTlpbYpHILTsr9n4RdEjX35uOd7IhDLW8W 9qFtQ7v9qVylne57M0BllBd89wScpiMy8+sV+xYlEqNlTt7uGUdCbfYEu8tBtE8QnCSXlY sScQIRAWE95IG+AMY5+TRaInXXgrIDU= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf22.hostedemail.com: domain of yi.zhang@huaweicloud.com designates 45.249.212.51 as permitted sender) smtp.mailfrom=yi.zhang@huaweicloud.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1712756220; a=rsa-sha256; cv=none; b=49xTVVS/NbAhYs5vroeLw0myR+0VE9kuEBoZplN15oeaiV7JLoKw2fdy0IrQD/xULwxFc1 9cJftE3St9ue2UwIY7sikUfRaXIGDVsgwRzQ8pit71ax0g4HWspic3oiCf50KD2EUpyEi/ vXNVkmsSl383tnm+1jmNoc9KWr3DNM0= Received: from mail.maildlp.com (unknown [172.19.93.142]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4VF3lK3T9wz4f3mHf for ; Wed, 10 Apr 2024 21:36:45 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id 269671A016E for ; Wed, 10 Apr 2024 21:36:54 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP1 (Coremail) with SMTP id cCh0CgAn+RHolRZmeCl4Jg--.8806S14; Wed, 10 Apr 2024 21:36:53 +0800 (CST) From: Zhang Yi To: linux-ext4@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, tytso@mit.edu, adilger.kernel@dilger.ca, jack@suse.cz, ritesh.list@gmail.com, hch@infradead.org, djwong@kernel.org, willy@infradead.org, zokeefe@google.com, yi.zhang@huawei.com, yi.zhang@huaweicloud.com, chengzhihao1@huawei.com, yukuai3@huawei.com, wangkefeng.wang@huawei.com Subject: [RFC PATCH v4 10/34] ext4: factor out ext4_map_create_blocks() to allocate new blocks Date: Wed, 10 Apr 2024 21:27:54 +0800 Message-Id: <20240410132818.2812377-11-yi.zhang@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240410132818.2812377-1-yi.zhang@huaweicloud.com> References: <20240410132818.2812377-1-yi.zhang@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: cCh0CgAn+RHolRZmeCl4Jg--.8806S14 X-Coremail-Antispam: 1UD129KBjvJXoW3XF17GrWUWFy8Jw4kJryxKrg_yoW7Kr47pr WfCFyrGr4jgw1qg3ySyr48XF1Yk3WFkrWUC3yfWryrZ345CrySyF15AFy3JF9rKrWxZw1Y qFWFy348Ca95GrDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPI14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq 3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7 IYx2IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4U M4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2 kIc2xKxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E 14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_GFv_WrylIx kGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVW8JVW5JwCI42IY6xIIjxv20xvEc7CjxVAF wI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr 0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUA rcfUUUUU= X-CM-SenderInfo: d1lo6xhdqjqx5xdzvxpfor3voofrz/ X-Rspamd-Queue-Id: 5A17CC000B X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: d9tf7ds17kbo9if7jxw88xzj9yabnutd X-HE-Tag: 1712756219-538102 X-HE-Meta: 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 oho35jnJ 6aJFOzxVGf9jrrPwl6/dbkO66dRydSvvmjpb05AzuFCO3fMLh47egfKCUkFVaeon/onlddl3qH7SOIUS125wzQ2qRBZWZNXM1il50miQWlg8rmH1R5Bk4by3gIfiCCDwth0S0NDpuEDruyQk3Q8+wB0M/4k7lf8MO3I+6aULp2MStEx4kvH4XhORl5QZ762qpTXZh7bX/KZUYt5rq20u+WtwaX6UGZgGwyTlYQytdTrmBvkA19MUXXD4k1OPwjfquRnnj X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Zhang Yi Factor out a common helper ext4_map_create_blocks() from ext4_map_blocks(), it allocate new blocks and create a new extent, no logic changes. Signed-off-by: Zhang Yi --- fs/ext4/inode.c | 157 +++++++++++++++++++++++++----------------------- 1 file changed, 81 insertions(+), 76 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 1731c1d24362..10a256cfcaa1 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -482,6 +482,86 @@ static int ext4_map_query_blocks(handle_t *handle, struct inode *inode, return retval; } +static int ext4_map_create_blocks(handle_t *handle, struct inode *inode, + struct ext4_map_blocks *map, int flags) +{ + struct extent_status es; + unsigned int status; + int err, retval = 0; + + /* + * Here we clear m_flags because after allocating an new extent, + * it will be set again. + */ + map->m_flags &= ~EXT4_MAP_FLAGS; + + /* + * We need to check for EXT4 here because migrate could have + * changed the inode type in between. + */ + if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) { + retval = ext4_ext_map_blocks(handle, inode, map, flags); + } else { + retval = ext4_ind_map_blocks(handle, inode, map, flags); + + /* + * We allocated new blocks which will result in i_data's + * format changing. Force the migrate to fail by clearing + * migrate flags. + */ + if (retval > 0 && map->m_flags & EXT4_MAP_NEW) + ext4_clear_inode_state(inode, EXT4_STATE_EXT_MIGRATE); + } + if (retval <= 0) + return retval; + + if (unlikely(retval != map->m_len)) { + ext4_warning(inode->i_sb, + "ES len assertion failed for inode %lu: " + "retval %d != map->m_len %d", + inode->i_ino, retval, map->m_len); + WARN_ON(1); + } + + /* + * We have to zeroout blocks before inserting them into extent + * status tree. Otherwise someone could look them up there and + * use them before they are really zeroed. We also have to + * unmap metadata before zeroing as otherwise writeback can + * overwrite zeros with stale data from block device. + */ + if (flags & EXT4_GET_BLOCKS_ZERO && + map->m_flags & EXT4_MAP_MAPPED && map->m_flags & EXT4_MAP_NEW) { + err = ext4_issue_zeroout(inode, map->m_lblk, map->m_pblk, + map->m_len); + if (err) + return err; + } + + /* + * If the extent has been zeroed out, we don't need to update + * extent status tree. + */ + if (flags & EXT4_GET_BLOCKS_PRE_IO && + ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es)) { + if (ext4_es_is_written(&es)) + return retval; + } + + status = map->m_flags & EXT4_MAP_UNWRITTEN ? + EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN; + if (!(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) && + !(status & EXTENT_STATUS_WRITTEN) && + ext4_es_scan_range(inode, &ext4_es_is_delayed, map->m_lblk, + map->m_lblk + map->m_len - 1)) + status |= EXTENT_STATUS_DELAYED; + + ext4_es_insert_extent(inode, map->m_lblk, map->m_len, + map->m_pblk, status); + + return retval; +} + /* * The ext4_map_blocks() function tries to look up the requested blocks, * and returns if the blocks are already mapped. @@ -630,12 +710,6 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, if (!(flags & EXT4_GET_BLOCKS_CONVERT_UNWRITTEN)) return retval; - /* - * Here we clear m_flags because after allocating an new extent, - * it will be set again. - */ - map->m_flags &= ~EXT4_MAP_FLAGS; - /* * New blocks allocate and/or writing to unwritten extent * will possibly result in updating i_data, so we take @@ -643,76 +717,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, * with create == 1 flag. */ down_write(&EXT4_I(inode)->i_data_sem); - - /* - * We need to check for EXT4 here because migrate - * could have changed the inode type in between - */ - if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) { - retval = ext4_ext_map_blocks(handle, inode, map, flags); - } else { - retval = ext4_ind_map_blocks(handle, inode, map, flags); - - if (retval > 0 && map->m_flags & EXT4_MAP_NEW) { - /* - * We allocated new blocks which will result in - * i_data's format changing. Force the migrate - * to fail by clearing migrate flags - */ - ext4_clear_inode_state(inode, EXT4_STATE_EXT_MIGRATE); - } - } - - if (retval > 0) { - unsigned int status; - - if (unlikely(retval != map->m_len)) { - ext4_warning(inode->i_sb, - "ES len assertion failed for inode " - "%lu: retval %d != map->m_len %d", - inode->i_ino, retval, map->m_len); - WARN_ON(1); - } - - /* - * We have to zeroout blocks before inserting them into extent - * status tree. Otherwise someone could look them up there and - * use them before they are really zeroed. We also have to - * unmap metadata before zeroing as otherwise writeback can - * overwrite zeros with stale data from block device. - */ - if (flags & EXT4_GET_BLOCKS_ZERO && - map->m_flags & EXT4_MAP_MAPPED && - map->m_flags & EXT4_MAP_NEW) { - ret = ext4_issue_zeroout(inode, map->m_lblk, - map->m_pblk, map->m_len); - if (ret) { - retval = ret; - goto out_sem; - } - } - - /* - * If the extent has been zeroed out, we don't need to update - * extent status tree. - */ - if ((flags & EXT4_GET_BLOCKS_PRE_IO) && - ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es)) { - if (ext4_es_is_written(&es)) - goto out_sem; - } - status = map->m_flags & EXT4_MAP_UNWRITTEN ? - EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN; - if (!(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) && - !(status & EXTENT_STATUS_WRITTEN) && - ext4_es_scan_range(inode, &ext4_es_is_delayed, map->m_lblk, - map->m_lblk + map->m_len - 1)) - status |= EXTENT_STATUS_DELAYED; - ext4_es_insert_extent(inode, map->m_lblk, map->m_len, - map->m_pblk, status); - } - -out_sem: + retval = ext4_map_create_blocks(handle, inode, map, flags); up_write((&EXT4_I(inode)->i_data_sem)); if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) { ret = check_block_validity(inode, map);