btrfs: use proper type for failrec in extent_state
We use the private member of extent_state to store the failrec and play pointless pointer games. Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
parent
04b285f35e
commit
47dc196ae7
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@ -232,7 +232,7 @@ static struct extent_state *alloc_extent_state(gfp_t mask)
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if (!state)
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return state;
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state->state = 0;
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state->private = 0;
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state->failrec = NULL;
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RB_CLEAR_NODE(&state->rb_node);
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btrfs_leak_debug_add(&state->leak_list, &states);
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atomic_set(&state->refs, 1);
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@ -1844,7 +1844,8 @@ out:
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* set the private field for a given byte offset in the tree. If there isn't
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* an extent_state there already, this does nothing.
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*/
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static int set_state_private(struct extent_io_tree *tree, u64 start, u64 private)
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static int set_state_failrec(struct extent_io_tree *tree, u64 start,
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struct io_failure_record *failrec)
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{
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struct rb_node *node;
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struct extent_state *state;
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@ -1865,13 +1866,14 @@ static int set_state_private(struct extent_io_tree *tree, u64 start, u64 private
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ret = -ENOENT;
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goto out;
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}
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state->private = private;
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state->failrec = failrec;
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out:
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spin_unlock(&tree->lock);
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return ret;
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}
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int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private)
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static int get_state_failrec(struct extent_io_tree *tree, u64 start,
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struct io_failure_record **failrec)
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{
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struct rb_node *node;
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struct extent_state *state;
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@ -1892,7 +1894,7 @@ int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private)
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ret = -ENOENT;
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goto out;
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}
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*private = state->private;
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*failrec = state->failrec;
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out:
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spin_unlock(&tree->lock);
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return ret;
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@ -1972,7 +1974,7 @@ int free_io_failure(struct inode *inode, struct io_failure_record *rec)
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int err = 0;
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struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
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set_state_private(failure_tree, rec->start, 0);
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set_state_failrec(failure_tree, rec->start, NULL);
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ret = clear_extent_bits(failure_tree, rec->start,
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rec->start + rec->len - 1,
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EXTENT_LOCKED | EXTENT_DIRTY, GFP_NOFS);
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@ -2089,7 +2091,6 @@ int clean_io_failure(struct inode *inode, u64 start, struct page *page,
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unsigned int pg_offset)
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{
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u64 private;
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u64 private_failure;
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struct io_failure_record *failrec;
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struct btrfs_fs_info *fs_info = BTRFS_I(inode)->root->fs_info;
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struct extent_state *state;
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@ -2102,12 +2103,11 @@ int clean_io_failure(struct inode *inode, u64 start, struct page *page,
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if (!ret)
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return 0;
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ret = get_state_private(&BTRFS_I(inode)->io_failure_tree, start,
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&private_failure);
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ret = get_state_failrec(&BTRFS_I(inode)->io_failure_tree, start,
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&failrec);
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if (ret)
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return 0;
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failrec = (struct io_failure_record *)(unsigned long) private_failure;
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BUG_ON(!failrec->this_mirror);
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if (failrec->in_validation) {
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@ -2167,7 +2167,7 @@ void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end)
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next = next_state(state);
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failrec = (struct io_failure_record *)(unsigned long)state->private;
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failrec = state->failrec;
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free_extent_state(state);
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kfree(failrec);
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@ -2177,10 +2177,9 @@ void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end)
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}
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int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
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struct io_failure_record **failrec_ret)
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struct io_failure_record **failrec_ret)
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{
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struct io_failure_record *failrec;
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u64 private;
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struct extent_map *em;
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struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
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struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
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@ -2188,7 +2187,7 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
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int ret;
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u64 logical;
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ret = get_state_private(failure_tree, start, &private);
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ret = get_state_failrec(failure_tree, start, &failrec);
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if (ret) {
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failrec = kzalloc(sizeof(*failrec), GFP_NOFS);
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if (!failrec)
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@ -2237,8 +2236,7 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
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ret = set_extent_bits(failure_tree, start, end,
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EXTENT_LOCKED | EXTENT_DIRTY, GFP_NOFS);
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if (ret >= 0)
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ret = set_state_private(failure_tree, start,
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(u64)(unsigned long)failrec);
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ret = set_state_failrec(failure_tree, start, failrec);
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/* set the bits in the inode's tree */
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if (ret >= 0)
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ret = set_extent_bits(tree, start, end, EXTENT_DAMAGED,
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@ -2248,7 +2246,6 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
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return ret;
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}
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} else {
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failrec = (struct io_failure_record *)(unsigned long)private;
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pr_debug("Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d\n",
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failrec->logical, failrec->start, failrec->len,
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failrec->in_validation);
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@ -62,6 +62,7 @@
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struct extent_state;
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struct btrfs_root;
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struct btrfs_io_bio;
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struct io_failure_record;
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typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
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struct bio *bio, int mirror_num,
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@ -112,8 +113,7 @@ struct extent_state {
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atomic_t refs;
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unsigned state;
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/* for use by the FS */
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u64 private;
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struct io_failure_record *failrec;
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#ifdef CONFIG_BTRFS_DEBUG
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struct list_head leak_list;
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@ -345,7 +345,6 @@ int extent_readpages(struct extent_io_tree *tree,
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get_extent_t get_extent);
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int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
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__u64 start, __u64 len, get_extent_t *get_extent);
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int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
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void set_page_extent_mapped(struct page *page);
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struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
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