From: Josef Bacik <josef@toxicpanda.com>
To: linux-btrfs@vger.kernel.org, kernel-team@fb.com
Subject: [PATCH 15/44] btrfs: grab a ref on the root in relink_extent_backref
Date: Fri, 6 Dec 2019 09:45:09 -0500 [thread overview]
Message-ID: <20191206144538.168112-16-josef@toxicpanda.com> (raw)
In-Reply-To: <20191206144538.168112-1-josef@toxicpanda.com>
We're doing an arbitrary lookup on an fs_root, we need to hold a ref on
that root.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/inode.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 88f3d6eace7a..3dc9bc9530e2 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2711,6 +2711,9 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
return PTR_ERR(root);
}
+ if (!btrfs_grab_fs_root(root))
+ return 0;
+
if (btrfs_root_readonly(root)) {
srcu_read_unlock(&fs_info->subvol_srcu, index);
return 0;
@@ -2722,6 +2725,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
key.offset = 0;
inode = btrfs_iget(fs_info->sb, &key, root);
+ btrfs_put_fs_root(root);
if (IS_ERR(inode)) {
srcu_read_unlock(&fs_info->subvol_srcu, index);
return 0;
--
2.23.0
next prev parent reply other threads:[~2019-12-06 14:46 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-06 14:44 [PATCH 0/44] Cleanup how we handle root refs, part 1 Josef Bacik
2019-12-06 14:44 ` [PATCH 01/44] btrfs: push __setup_root into btrfs_alloc_root Josef Bacik
2019-12-06 14:44 ` [PATCH 02/44] btrfs: move fs root init stuff into btrfs_init_fs_root Josef Bacik
2019-12-06 14:44 ` [PATCH 03/44] btrfs: make btrfs_find_orphan_roots use btrfs_get_fs_root Josef Bacik
2019-12-06 14:44 ` [PATCH 04/44] btrfs: export and use btrfs_read_tree_root Josef Bacik
2019-12-06 14:44 ` [PATCH 05/44] btrfs: make relocation use btrfs_read_tree_root() Josef Bacik
2019-12-06 14:45 ` [PATCH 06/44] btrfs: kill btrfs_read_fs_root Josef Bacik
2019-12-06 14:45 ` [PATCH 07/44] btrfs: kill the btrfs_read_fs_root_no_name helper Josef Bacik
2019-12-06 14:45 ` [PATCH 08/44] btrfs: make the fs root init functions static Josef Bacik
2019-12-06 14:45 ` [PATCH 09/44] btrfs: handle NULL roots in btrfs_put_fs_root() Josef Bacik
2019-12-06 14:45 ` [PATCH 10/44] btrfs: hold a ref on fs roots while they're in the radix tree Josef Bacik
2019-12-06 14:45 ` [PATCH 11/44] btrfs: hold a ref on the root in resolve_indirect_ref Josef Bacik
2019-12-06 14:45 ` [PATCH 12/44] btrfs: hold a root ref in btrfs_get_dentry Josef Bacik
2019-12-06 14:45 ` [PATCH 13/44] btrfs: hold a ref on the root in __btrfs_run_defrag_inode Josef Bacik
2019-12-06 14:45 ` [PATCH 14/44] btrfs: hold a ref for the root in record_one_backref Josef Bacik
2019-12-06 14:45 ` Josef Bacik [this message]
2019-12-06 14:45 ` [PATCH 16/44] btrfs: hold a ref on the root in fixup_tree_root_location Josef Bacik
2019-12-06 14:45 ` [PATCH 17/44] btrfs: hold a ref on the root in create_subvol Josef Bacik
2019-12-06 14:45 ` [PATCH 18/44] btrfs: hold a ref on the root in search_ioctl Josef Bacik
2019-12-06 14:45 ` [PATCH 19/44] btrfs: hold a ref on the root in btrfs_search_path_in_tree Josef Bacik
2019-12-06 14:45 ` [PATCH 20/44] btrfs: hold a ref on the root in btrfs_search_path_in_tree_user Josef Bacik
2019-12-06 14:45 ` [PATCH 21/44] btrfs: hold a ref on the root in btrfs_ioctl_get_subvol_info Josef Bacik
2019-12-06 14:45 ` [PATCH 22/44] btrfs: hold ref on root in btrfs_ioctl_default_subvol Josef Bacik
2019-12-06 14:45 ` [PATCH 23/44] btrfs: hold a ref on the root in build_backref_tree Josef Bacik
2019-12-06 14:45 ` [PATCH 24/44] btrfs: hold a ref on the root in prepare_to_merge Josef Bacik
2019-12-06 14:45 ` [PATCH 25/44] btrfs: hold a ref on the root in merge_reloc_roots Josef Bacik
2019-12-06 14:45 ` [PATCH 26/44] btrfs: hold a ref on the root in record_reloc_root_in_trans Josef Bacik
2019-12-06 14:45 ` [PATCH 27/44] btrfs: hold a ref on the root in find_data_references Josef Bacik
2019-12-06 14:45 ` [PATCH 28/44] btrfs: hold a ref on the root in create_reloc_inode Josef Bacik
2019-12-06 14:45 ` [PATCH 29/44] btrfs: hold a ref on the root in btrfs_recover_relocation Josef Bacik
2019-12-06 14:45 ` [PATCH 30/44] btrfs: push grab_fs_root into read_fs_root Josef Bacik
2019-12-06 14:45 ` [PATCH 31/44] btrfs: hold a ref for the root in btrfs_find_orphan_roots Josef Bacik
2019-12-06 14:45 ` [PATCH 32/44] btrfs: hold a ref on the root in scrub_print_warning_inode Josef Bacik
2019-12-06 14:45 ` [PATCH 33/44] btrfs: hold a ref on the root in btrfs_ioctl_send Josef Bacik
2019-12-06 14:45 ` [PATCH 34/44] btrfs: hold a ref on the root in get_subvol_name_from_objectid Josef Bacik
2019-12-06 14:45 ` [PATCH 35/44] btrfs: hold a ref on the root in create_pending_snapshot Josef Bacik
2019-12-06 14:45 ` [PATCH 36/44] btrfs: hold a ref on the root in btrfs_recover_log_trees Josef Bacik
2019-12-06 14:45 ` [PATCH 37/44] btrfs: hold a ref on the root in btrfs_check_uuid_tree_entry Josef Bacik
2019-12-06 14:45 ` [PATCH 38/44] btrfs: hold a ref on the root in open_ctree Josef Bacik
2019-12-06 14:45 ` [PATCH 39/44] btrfs: use btrfs_put_fs_root to free roots always Josef Bacik
2019-12-06 14:45 ` [PATCH 40/44] btrfs: push btrfs_grab_fs_root into btrfs_get_fs_root Josef Bacik
2019-12-06 14:45 ` [PATCH 41/44] btrfs: free more things in btrfs_free_fs_info Josef Bacik
2019-12-06 14:45 ` [PATCH 42/44] btrfs: move fs_info init work into it's own helper function Josef Bacik
2019-12-06 14:45 ` [PATCH 43/44] btrfs: add a leak check for roots Josef Bacik
2019-12-06 14:45 ` [PATCH 44/44] btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root Josef Bacik
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