diff options
| -rw-r--r-- | fs/ocfs2/journal.h | 14 | ||||
| -rw-r--r-- | fs/ocfs2/refcounttree.c | 345 |
2 files changed, 353 insertions, 6 deletions
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h index b2dc125c6e9a..bd88c8b9f2fb 100644 --- a/fs/ocfs2/journal.h +++ b/fs/ocfs2/journal.h @@ -490,6 +490,20 @@ static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb) return credits; } +/* inode update, new refcount block and its allocation credits. */ +#define OCFS2_REFCOUNT_TREE_CREATE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1 \ + + OCFS2_SUBALLOC_ALLOC) + +/* inode and the refcount block update. */ +#define OCFS2_REFCOUNT_TREE_SET_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) + +/* + * inode and the refcount block update. + * It doesn't include the credits for sub alloc change. + * So if we need to free the bit, OCFS2_SUBALLOC_FREE needs to be added. + */ +#define OCFS2_REFCOUNT_TREE_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) + /* * Please note that the caller must make sure that root_el is the root * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c index 8d79de8637b8..d0d6fa312b01 100644 --- a/fs/ocfs2/refcounttree.c +++ b/fs/ocfs2/refcounttree.c @@ -27,6 +27,7 @@ #include "buffer_head_io.h" #include "blockcheck.h" #include "refcounttree.h" +#include "sysfile.h" #include "dlmglue.h" static inline struct ocfs2_refcount_tree * @@ -272,6 +273,22 @@ static inline void ocfs2_init_refcount_tree_lock(struct ocfs2_super *osb, rf_blkno, generation); } +static struct ocfs2_refcount_tree* +ocfs2_allocate_refcount_tree(struct ocfs2_super *osb, u64 rf_blkno) +{ + struct ocfs2_refcount_tree *new; + + new = kzalloc(sizeof(struct ocfs2_refcount_tree), GFP_NOFS); + if (!new) + return NULL; + + new->rf_blkno = rf_blkno; + kref_init(&new->rf_getcnt); + ocfs2_init_refcount_tree_ci(new, osb->sb); + + return new; +} + static int ocfs2_get_refcount_tree(struct ocfs2_super *osb, u64 rf_blkno, struct ocfs2_refcount_tree **ret_tree) { @@ -291,16 +308,12 @@ static int ocfs2_get_refcount_tree(struct ocfs2_super *osb, u64 rf_blkno, spin_unlock(&osb->osb_lock); - new = kzalloc(sizeof(struct ocfs2_refcount_tree), GFP_NOFS); + new = ocfs2_allocate_refcount_tree(osb, rf_blkno); if (!new) { ret = -ENOMEM; + mlog_errno(ret); return ret; } - - new->rf_blkno = rf_blkno; - kref_init(&new->rf_getcnt); - ocfs2_init_refcount_tree_ci(new, osb->sb); - /* * We need the generation to create the refcount tree lock and since * it isn't changed during the tree modification, we are safe here to @@ -515,3 +528,323 @@ void ocfs2_purge_refcount_trees(struct ocfs2_super *osb) ocfs2_free_refcount_tree(tree); } } + +/* + * Create a refcount tree for an inode. + * We take for granted that the inode is already locked. + */ +static int ocfs2_create_refcount_tree(struct inode *inode, + struct buffer_head *di_bh) +{ + int ret; + handle_t *handle = NULL; + struct ocfs2_alloc_context *meta_ac = NULL; + struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; + struct ocfs2_inode_info *oi = OCFS2_I(inode); + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct buffer_head *new_bh = NULL; + struct ocfs2_refcount_block *rb; + struct ocfs2_refcount_tree *new_tree = NULL, *tree = NULL; + u16 suballoc_bit_start; + u32 num_got; + u64 first_blkno; + + BUG_ON(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL); + + mlog(0, "create tree for inode %lu\n", inode->i_ino); + + ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); + if (ret) { + mlog_errno(ret); + goto out; + } + + handle = ocfs2_start_trans(osb, OCFS2_REFCOUNT_TREE_CREATE_CREDITS); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + mlog_errno(ret); + goto out; + } + + ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, + &suballoc_bit_start, &num_got, + &first_blkno); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + new_tree = ocfs2_allocate_refcount_tree(osb, first_blkno); + if (!new_tree) { + ret = -ENOMEM; + mlog_errno(ret); + goto out_commit; + } + + new_bh = sb_getblk(inode->i_sb, first_blkno); + ocfs2_set_new_buffer_uptodate(&new_tree->rf_ci, new_bh); + + ret = ocfs2_journal_access_rb(handle, &new_tree->rf_ci, new_bh, + OCFS2_JOURNAL_ACCESS_CREATE); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + /* Initialize ocfs2_refcount_block. */ + rb = (struct ocfs2_refcount_block *)new_bh->b_data; + memset(rb, 0, inode->i_sb->s_blocksize); + strcpy((void *)rb, OCFS2_REFCOUNT_BLOCK_SIGNATURE); + rb->rf_suballoc_slot = cpu_to_le16(osb->slot_num); + rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start); + rb->rf_fs_generation = cpu_to_le32(osb->fs_generation); + rb->rf_blkno = cpu_to_le64(first_blkno); + rb->rf_count = cpu_to_le32(1); + rb->rf_records.rl_count = + cpu_to_le16(ocfs2_refcount_recs_per_rb(osb->sb)); + spin_lock(&osb->osb_lock); + rb->rf_generation = osb->s_next_generation++; + spin_unlock(&osb->osb_lock); + + ocfs2_journal_dirty(handle, new_bh); + + spin_lock(&oi->ip_lock); + oi->ip_dyn_features |= OCFS2_HAS_REFCOUNT_FL; + di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); + di->i_refcount_loc = cpu_to_le64(first_blkno); + spin_unlock(&oi->ip_lock); + + mlog(0, "created tree for inode %lu, refblock %llu\n", + inode->i_ino, (unsigned long long)first_blkno); + + ocfs2_journal_dirty(handle, di_bh); + + /* + * We have to init the tree lock here since it will use + * the generation number to create it. + */ + new_tree->rf_generation = le32_to_cpu(rb->rf_generation); + ocfs2_init_refcount_tree_lock(osb, new_tree, first_blkno, + new_tree->rf_generation); + + spin_lock(&osb->osb_lock); + tree = ocfs2_find_refcount_tree(osb, first_blkno); + + /* + * We've just created a new refcount tree in this block. If + * we found a refcount tree on the ocfs2_super, it must be + * one we just deleted. We free the old tree before + * inserting the new tree. + */ + BUG_ON(tree && tree->rf_generation == new_tree->rf_generation); + if (tree) + ocfs2_erase_refcount_tree_from_list_no_lock(osb, tree); + ocfs2_insert_refcount_tree(osb, new_tree); + spin_unlock(&osb->osb_lock); + new_tree = NULL; + if (tree) + ocfs2_refcount_tree_put(tree); + +out_commit: + ocfs2_commit_trans(osb, handle); + +out: + if (new_tree) { + ocfs2_metadata_cache_exit(&new_tree->rf_ci); + kfree(new_tree); + } + + brelse(new_bh); + if (meta_ac) + ocfs2_free_alloc_context(meta_ac); + + return ret; +} + +static int ocfs2_set_refcount_tree(struct inode *inode, + struct buffer_head *di_bh, + u64 refcount_loc) +{ + int ret; + handle_t *handle = NULL; + struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; + struct ocfs2_inode_info *oi = OCFS2_I(inode); + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct buffer_head *ref_root_bh = NULL; + struct ocfs2_refcount_block *rb; + struct ocfs2_refcount_tree *ref_tree; + + BUG_ON(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL); + + ret = ocfs2_lock_refcount_tree(osb, refcount_loc, 1, + &ref_tree, &ref_root_bh); + if (ret) { + mlog_errno(ret); + return ret; + } + + handle = ocfs2_start_trans(osb, OCFS2_REFCOUNT_TREE_SET_CREDITS); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + mlog_errno(ret); + goto out; + } + + ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + ret = ocfs2_journal_access_rb(handle, &ref_tree->rf_ci, ref_root_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; + le32_add_cpu(&rb->rf_count, 1); + + ocfs2_journal_dirty(handle, ref_root_bh); + + spin_lock(&oi->ip_lock); + oi->ip_dyn_features |= OCFS2_HAS_REFCOUNT_FL; + di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); + di->i_refcount_loc = cpu_to_le64(refcount_loc); + spin_unlock(&oi->ip_lock); + ocfs2_journal_dirty(handle, di_bh); + +out_commit: + ocfs2_commit_trans(osb, handle); +out: + ocfs2_unlock_refcount_tree(osb, ref_tree, 1); + brelse(ref_root_bh); + + return ret; +} + +int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh) +{ + int ret, delete_tree = 0; + handle_t *handle = NULL; + struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; + struct ocfs2_inode_info *oi = OCFS2_I(inode); + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_refcount_block *rb; + struct inode *alloc_inode = NULL; + struct buffer_head *alloc_bh = NULL; + struct buffer_head *blk_bh = NULL; + struct ocfs2_refcount_tree *ref_tree; + int credits = OCFS2_REFCOUNT_TREE_REMOVE_CREDITS; + u64 blk = 0, bg_blkno = 0, ref_blkno = le64_to_cpu(di->i_refcount_loc); + u16 bit = 0; + + if (!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)) + return 0; + + BUG_ON(!ref_blkno); + ret = ocfs2_lock_refcount_tree(osb, ref_blkno, 1, &ref_tree, &blk_bh); + if (ret) { + mlog_errno(ret); + return ret; + } + + rb = (struct ocfs2_refcount_block *)blk_bh->b_data; + + /* + * If we are the last user, we need to free the block. + * So lock the allocator ahead. + */ + if (le32_to_cpu(rb->rf_count) == 1) { + blk = le64_to_cpu(rb->rf_blkno); + bit = le16_to_cpu(rb->rf_suballoc_bit); + bg_blkno = ocfs2_which_suballoc_group(blk, bit); + + alloc_inode = ocfs2_get_system_file_inode(osb, + EXTENT_ALLOC_SYSTEM_INODE, + le16_to_cpu(rb->rf_suballoc_slot)); + if (!alloc_inode) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + mutex_lock(&alloc_inode->i_mutex); + + ret = ocfs2_inode_lock(alloc_inode, &alloc_bh, 1); + if (ret) { + mlog_errno(ret); + goto out_mutex; + } + + credits += OCFS2_SUBALLOC_FREE; + } + + handle = ocfs2_start_trans(osb, credits); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + mlog_errno(ret); + goto out_unlock; + } + + ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + ret = ocfs2_journal_access_rb(handle, &ref_tree->rf_ci, blk_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + spin_lock(&oi->ip_lock); + oi->ip_dyn_features &= ~OCFS2_HAS_REFCOUNT_FL; + di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); + di->i_refcount_loc = 0; + spin_unlock(&oi->ip_lock); + ocfs2_journal_dirty(handle, di_bh); + + le32_add_cpu(&rb->rf_count , -1); + ocfs2_journal_dirty(handle, blk_bh); + + if (!rb->rf_count) { + delete_tree = 1; + ocfs2_erase_refcount_tree_from_list(osb, ref_tree); + ret = ocfs2_free_suballoc_bits(handle, alloc_inode, + alloc_bh, bit, bg_blkno, 1); + if (ret) + mlog_errno(ret); + } + +out_commit: + ocfs2_commit_trans(osb, handle); +out_unlock: + if (alloc_inode) { + ocfs2_inode_unlock(alloc_inode, 1); + brelse(alloc_bh); + } +out_mutex: + if (alloc_inode) { + mutex_unlock(&alloc_inode->i_mutex); + iput(alloc_inode); + } +out: + ocfs2_unlock_refcount_tree(osb, ref_tree, 1); + if (delete_tree) + ocfs2_refcount_tree_put(ref_tree); + brelse(blk_bh); + + return ret; +} |