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>
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 2e7c97a..f3910ac 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -232,7 +232,7 @@
if (!state)
return state;
state->state = 0;
- state->private = 0;
+ state->failrec = NULL;
RB_CLEAR_NODE(&state->rb_node);
btrfs_leak_debug_add(&state->leak_list, &states);
atomic_set(&state->refs, 1);
@@ -1844,7 +1844,8 @@
* set the private field for a given byte offset in the tree. If there isn't
* an extent_state there already, this does nothing.
*/
-static int set_state_private(struct extent_io_tree *tree, u64 start, u64 private)
+static int set_state_failrec(struct extent_io_tree *tree, u64 start,
+ struct io_failure_record *failrec)
{
struct rb_node *node;
struct extent_state *state;
@@ -1865,13 +1866,14 @@
ret = -ENOENT;
goto out;
}
- state->private = private;
+ state->failrec = failrec;
out:
spin_unlock(&tree->lock);
return ret;
}
-int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private)
+static int get_state_failrec(struct extent_io_tree *tree, u64 start,
+ struct io_failure_record **failrec)
{
struct rb_node *node;
struct extent_state *state;
@@ -1892,7 +1894,7 @@
ret = -ENOENT;
goto out;
}
- *private = state->private;
+ *failrec = state->failrec;
out:
spin_unlock(&tree->lock);
return ret;
@@ -1972,7 +1974,7 @@
int err = 0;
struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
- set_state_private(failure_tree, rec->start, 0);
+ set_state_failrec(failure_tree, rec->start, NULL);
ret = clear_extent_bits(failure_tree, rec->start,
rec->start + rec->len - 1,
EXTENT_LOCKED | EXTENT_DIRTY, GFP_NOFS);
@@ -2089,7 +2091,6 @@
unsigned int pg_offset)
{
u64 private;
- u64 private_failure;
struct io_failure_record *failrec;
struct btrfs_fs_info *fs_info = BTRFS_I(inode)->root->fs_info;
struct extent_state *state;
@@ -2102,12 +2103,11 @@
if (!ret)
return 0;
- ret = get_state_private(&BTRFS_I(inode)->io_failure_tree, start,
- &private_failure);
+ ret = get_state_failrec(&BTRFS_I(inode)->io_failure_tree, start,
+ &failrec);
if (ret)
return 0;
- failrec = (struct io_failure_record *)(unsigned long) private_failure;
BUG_ON(!failrec->this_mirror);
if (failrec->in_validation) {
@@ -2167,7 +2167,7 @@
next = next_state(state);
- failrec = (struct io_failure_record *)(unsigned long)state->private;
+ failrec = state->failrec;
free_extent_state(state);
kfree(failrec);
@@ -2177,10 +2177,9 @@
}
int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
- struct io_failure_record **failrec_ret)
+ struct io_failure_record **failrec_ret)
{
struct io_failure_record *failrec;
- u64 private;
struct extent_map *em;
struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
@@ -2188,7 +2187,7 @@
int ret;
u64 logical;
- ret = get_state_private(failure_tree, start, &private);
+ ret = get_state_failrec(failure_tree, start, &failrec);
if (ret) {
failrec = kzalloc(sizeof(*failrec), GFP_NOFS);
if (!failrec)
@@ -2237,8 +2236,7 @@
ret = set_extent_bits(failure_tree, start, end,
EXTENT_LOCKED | EXTENT_DIRTY, GFP_NOFS);
if (ret >= 0)
- ret = set_state_private(failure_tree, start,
- (u64)(unsigned long)failrec);
+ ret = set_state_failrec(failure_tree, start, failrec);
/* set the bits in the inode's tree */
if (ret >= 0)
ret = set_extent_bits(tree, start, end, EXTENT_DAMAGED,
@@ -2248,7 +2246,6 @@
return ret;
}
} else {
- failrec = (struct io_failure_record *)(unsigned long)private;
pr_debug("Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d\n",
failrec->logical, failrec->start, failrec->len,
failrec->in_validation);