From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/btrfs/ioctl.c | 24 +++++++++++++++++-------
1 files changed, 17 insertions(+), 7 deletions(-)
diff --git a/kernel/fs/btrfs/ioctl.c b/kernel/fs/btrfs/ioctl.c
index a17076a..930126b 100644
--- a/kernel/fs/btrfs/ioctl.c
+++ b/kernel/fs/btrfs/ioctl.c
@@ -2550,6 +2550,13 @@
goto out_put;
}
+ /*
+ * We don't need the path anymore, so release it and
+ * avoid deadlocks and lockdep warnings in case
+ * btrfs_iget() needs to lookup the inode from its root
+ * btree and lock the same leaf.
+ */
+ btrfs_release_path(path);
temp_inode = btrfs_iget(sb, key2.objectid, root);
if (IS_ERR(temp_inode)) {
ret = PTR_ERR(temp_inode);
@@ -2569,7 +2576,6 @@
goto out_put;
}
- btrfs_release_path(path);
key.objectid = key.offset;
key.offset = (u64)-1;
dirid = key.objectid;
@@ -3401,13 +3407,10 @@
di_args->bytes_used = btrfs_device_get_bytes_used(dev);
di_args->total_bytes = btrfs_device_get_total_bytes(dev);
memcpy(di_args->uuid, dev->uuid, sizeof(di_args->uuid));
- if (dev->name) {
- strncpy(di_args->path, rcu_str_deref(dev->name),
- sizeof(di_args->path) - 1);
- di_args->path[sizeof(di_args->path) - 1] = 0;
- } else {
+ if (dev->name)
+ strscpy(di_args->path, rcu_str_deref(dev->name), sizeof(di_args->path));
+ else
di_args->path[0] = '\0';
- }
out:
rcu_read_unlock();
@@ -3704,6 +3707,11 @@
sa = memdup_user(arg, sizeof(*sa));
if (IS_ERR(sa))
return PTR_ERR(sa);
+
+ if (sa->flags & ~BTRFS_SCRUB_SUPPORTED_FLAGS) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
if (!(sa->flags & BTRFS_SCRUB_READONLY)) {
ret = mnt_want_write_file(file);
@@ -4257,7 +4265,9 @@
}
/* update qgroup status and info */
+ mutex_lock(&fs_info->qgroup_ioctl_lock);
err = btrfs_run_qgroups(trans);
+ mutex_unlock(&fs_info->qgroup_ioctl_lock);
if (err < 0)
btrfs_handle_fs_error(fs_info, err,
"failed to update qgroup status and info");
--
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