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Message-Id: <20230826155028.4019470-9-shikemeng@huaweicloud.com> Date: Sat, 26 Aug 2023 23:50:25 +0800 From: Kemeng Shi <shikemeng@...weicloud.com> To: tytso@....edu, adilger.kernel@...ger.ca, ritesh.list@...il.com, linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH v6 08/11] ext4: call ext4_mb_mark_context in ext4_group_add_blocks() Call ext4_mb_mark_context in ext4_group_add_blocks() to remove repeat code. Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com> --- fs/ext4/mballoc.c | 84 +++++++---------------------------------------- 1 file changed, 12 insertions(+), 72 deletions(-) diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index bb08a71a6e61..fdffa3b40bcd 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -6681,25 +6681,22 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode, int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, ext4_fsblk_t block, unsigned long count) { - struct buffer_head *bitmap_bh = NULL; - struct buffer_head *gd_bh; + struct ext4_mark_context mc; ext4_group_t block_group; ext4_grpblk_t bit; - unsigned int i; - struct ext4_group_desc *desc; struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_buddy e4b; - int err = 0, ret, free_clusters_count; - ext4_grpblk_t clusters_freed; + int err = 0; ext4_fsblk_t first_cluster = EXT4_B2C(sbi, block); ext4_fsblk_t last_cluster = EXT4_B2C(sbi, block + count - 1); unsigned long cluster_count = last_cluster - first_cluster + 1; ext4_debug("Adding block(s) %llu-%llu\n", block, block + count - 1); - if (count == 0) + if (cluster_count == 0) return 0; + ext4_mb_prepare_mark_context(&mc, handle, sb, 0); ext4_get_group_no_and_offset(sb, block, &block_group, &bit); /* * Check to see if we are freeing blocks across a group @@ -6712,19 +6709,6 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, goto error_return; } - bitmap_bh = ext4_read_block_bitmap(sb, block_group); - if (IS_ERR(bitmap_bh)) { - err = PTR_ERR(bitmap_bh); - bitmap_bh = NULL; - goto error_return; - } - - desc = ext4_get_group_desc(sb, block_group, &gd_bh); - if (!desc) { - err = -EIO; - goto error_return; - } - if (!ext4_sb_block_valid(sb, NULL, block, count)) { ext4_error(sb, "Adding blocks in system zones - " "Block = %llu, count = %lu", @@ -6733,74 +6717,30 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, goto error_return; } - BUFFER_TRACE(bitmap_bh, "getting write access"); - err = ext4_journal_get_write_access(handle, sb, bitmap_bh, - EXT4_JTR_NONE); + err = ext4_mb_load_buddy(sb, block_group, &e4b); if (err) goto error_return; - /* - * We are about to modify some metadata. Call the journal APIs - * to unshare ->b_data if a currently-committing transaction is - * using it - */ - BUFFER_TRACE(gd_bh, "get_write_access"); - err = ext4_journal_get_write_access(handle, sb, gd_bh, EXT4_JTR_NONE); - if (err) + err = ext4_mb_mark_context(&mc, block_group, bit, cluster_count, + EXT4_MB_BITMAP_MARKED_CHECK); + if (err && mc.changed == 0) { + ext4_mb_unload_buddy(&e4b); goto error_return; - - for (i = 0, clusters_freed = 0; i < cluster_count; i++) { - BUFFER_TRACE(bitmap_bh, "clear bit"); - if (!mb_test_bit(bit + i, bitmap_bh->b_data)) { - ext4_error(sb, "bit already cleared for block %llu", - (ext4_fsblk_t)(block + i)); - BUFFER_TRACE(bitmap_bh, "bit already cleared"); - } else { - clusters_freed++; - } } - err = ext4_mb_load_buddy(sb, block_group, &e4b); - if (err) - goto error_return; - - ext4_lock_group(sb, block_group); - mb_clear_bits(bitmap_bh->b_data, bit, cluster_count); - free_clusters_count = clusters_freed + - ext4_free_group_clusters(sb, desc); - ext4_free_group_clusters_set(sb, desc, free_clusters_count); - ext4_block_bitmap_csum_set(sb, desc, bitmap_bh); - ext4_group_desc_csum_set(sb, block_group, desc); - ext4_unlock_group(sb, block_group); + if (mc.changed != cluster_count) + ext4_error(sb, "bit already cleared in group %u", block_group); ext4_lock_group(sb, block_group); mb_free_blocks(NULL, &e4b, bit, cluster_count); ext4_unlock_group(sb, block_group); percpu_counter_add(&sbi->s_freeclusters_counter, - clusters_freed); - - if (sbi->s_log_groups_per_flex) { - ext4_group_t flex_group = ext4_flex_group(sbi, block_group); - atomic64_add(clusters_freed, - &sbi_array_rcu_deref(sbi, s_flex_groups, - flex_group)->free_clusters); - } + mc.changed); ext4_mb_unload_buddy(&e4b); - /* We dirtied the bitmap block */ - BUFFER_TRACE(bitmap_bh, "dirtied bitmap block"); - err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh); - - /* And the group descriptor block */ - BUFFER_TRACE(gd_bh, "dirtied group descriptor block"); - ret = ext4_handle_dirty_metadata(handle, NULL, gd_bh); - if (!err) - err = ret; - error_return: - brelse(bitmap_bh); ext4_std_error(sb, err); return err; } -- 2.30.0
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