From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/fs/btrfs/uuid-tree.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++-------
1 files changed, 52 insertions(+), 7 deletions(-)
diff --git a/kernel/fs/btrfs/uuid-tree.c b/kernel/fs/btrfs/uuid-tree.c
index 5bbb977..28525ad 100644
--- a/kernel/fs/btrfs/uuid-tree.c
+++ b/kernel/fs/btrfs/uuid-tree.c
@@ -121,12 +121,12 @@
* An item with that type already exists.
* Extend the item and store the new subid at the end.
*/
- btrfs_extend_item(fs_info, path, sizeof(subid_le));
+ btrfs_extend_item(path, sizeof(subid_le));
eb = path->nodes[0];
slot = path->slots[0];
offset = btrfs_item_ptr_offset(eb, slot);
offset += btrfs_item_size_nr(eb, slot) - sizeof(subid_le);
- } else if (ret < 0) {
+ } else {
btrfs_warn(fs_info,
"insert uuid item failed %d (0x%016llx, 0x%016llx) type %u!",
ret, (unsigned long long)key.objectid,
@@ -219,7 +219,7 @@
move_src = offset + sizeof(subid);
move_len = item_size - (move_src - btrfs_item_ptr_offset(eb, slot));
memmove_extent_buffer(eb, move_dst, move_src, move_len);
- btrfs_truncate_item(fs_info, path, item_size - sizeof(subid), 1);
+ btrfs_truncate_item(path, item_size - sizeof(subid), 1);
out:
btrfs_free_path(path);
@@ -246,9 +246,49 @@
return ret;
}
-int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
- int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
- u64))
+/*
+ * Check if there's an matching subvolume for given UUID
+ *
+ * Return:
+ * 0 check succeeded, the entry is not outdated
+ * > 0 if the check failed, the caller should remove the entry
+ * < 0 if an error occurred
+ */
+static int btrfs_check_uuid_tree_entry(struct btrfs_fs_info *fs_info,
+ u8 *uuid, u8 type, u64 subvolid)
+{
+ int ret = 0;
+ struct btrfs_root *subvol_root;
+
+ if (type != BTRFS_UUID_KEY_SUBVOL &&
+ type != BTRFS_UUID_KEY_RECEIVED_SUBVOL)
+ goto out;
+
+ subvol_root = btrfs_get_fs_root(fs_info, subvolid, true);
+ if (IS_ERR(subvol_root)) {
+ ret = PTR_ERR(subvol_root);
+ if (ret == -ENOENT)
+ ret = 1;
+ goto out;
+ }
+
+ switch (type) {
+ case BTRFS_UUID_KEY_SUBVOL:
+ if (memcmp(uuid, subvol_root->root_item.uuid, BTRFS_UUID_SIZE))
+ ret = 1;
+ break;
+ case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
+ if (memcmp(uuid, subvol_root->root_item.received_uuid,
+ BTRFS_UUID_SIZE))
+ ret = 1;
+ break;
+ }
+ btrfs_put_root(subvol_root);
+out:
+ return ret;
+}
+
+int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root = fs_info->uuid_root;
struct btrfs_key key;
@@ -278,6 +318,10 @@
}
while (1) {
+ if (btrfs_fs_closing(fs_info)) {
+ ret = -EINTR;
+ goto out;
+ }
cond_resched();
leaf = path->nodes[0];
slot = path->slots[0];
@@ -305,7 +349,8 @@
read_extent_buffer(leaf, &subid_le, offset,
sizeof(subid_le));
subid_cpu = le64_to_cpu(subid_le);
- ret = check_func(fs_info, uuid, key.type, subid_cpu);
+ ret = btrfs_check_uuid_tree_entry(fs_info, uuid,
+ key.type, subid_cpu);
if (ret < 0)
goto out;
if (ret > 0) {
--
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