From: Josef Bacik <josef@toxicpanda.com>
To: kernel-team@fb.com, linux-btrfs@vger.kernel.org
Subject: [PATCH 12/44] btrfs: hold a root ref in btrfs_get_dentry
Date: Fri, 24 Jan 2020 09:32:29 -0500 [thread overview]
Message-ID: <20200124143301.2186319-13-josef@toxicpanda.com> (raw)
In-Reply-To: <20200124143301.2186319-1-josef@toxicpanda.com>
Looking up the inode we need to search the root, make sure we hold a
reference on that root while we're doing the lookup.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/export.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c
index 08cd8c4a02a5..eba6c6d27bad 100644
--- a/fs/btrfs/export.c
+++ b/fs/btrfs/export.c
@@ -82,12 +82,17 @@ static struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid,
err = PTR_ERR(root);
goto fail;
}
+ if (!btrfs_grab_fs_root(root)) {
+ err = -ENOENT;
+ goto fail;
+ }
key.objectid = objectid;
key.type = BTRFS_INODE_ITEM_KEY;
key.offset = 0;
inode = btrfs_iget(sb, &key, root);
+ btrfs_put_fs_root(root);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto fail;
--
2.24.1
next prev parent reply other threads:[~2020-01-24 14:33 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-24 14:32 [PATCH 00/44][v5] Cleanup how we handle root refs, part 1 Josef Bacik
2020-01-24 14:32 ` [PATCH 01/44] btrfs: push __setup_root into btrfs_alloc_root Josef Bacik
2020-02-04 22:05 ` David Sterba
2020-01-24 14:32 ` [PATCH 02/44] btrfs: move fs root init stuff into btrfs_init_fs_root Josef Bacik
2020-01-24 14:32 ` [PATCH 03/44] btrfs: make btrfs_find_orphan_roots use btrfs_get_fs_root Josef Bacik
2020-01-24 14:32 ` [PATCH 04/44] btrfs: export and use btrfs_read_tree_root Josef Bacik
2020-01-24 14:32 ` [PATCH 05/44] btrfs: make relocation use btrfs_read_tree_root() Josef Bacik
2020-01-24 14:32 ` [PATCH 06/44] btrfs: kill btrfs_read_fs_root Josef Bacik
2020-01-24 14:32 ` [PATCH 07/44] btrfs: kill the btrfs_read_fs_root_no_name helper Josef Bacik
2020-01-24 14:32 ` [PATCH 08/44] btrfs: make the fs root init functions static Josef Bacik
2020-01-24 14:32 ` [PATCH 09/44] btrfs: handle NULL roots in btrfs_put/btrfs_grab_fs_root Josef Bacik
2020-01-24 14:32 ` [PATCH 10/44] btrfs: hold a ref on fs roots while they're in the radix tree Josef Bacik
2020-01-24 14:32 ` [PATCH 11/44] btrfs: hold a ref on the root in resolve_indirect_ref Josef Bacik
2020-01-24 14:32 ` Josef Bacik [this message]
2020-01-24 14:32 ` [PATCH 13/44] btrfs: hold a ref on the root in __btrfs_run_defrag_inode Josef Bacik
2020-01-24 14:32 ` [PATCH 14/44] btrfs: hold a ref on the root in fixup_tree_root_location Josef Bacik
2020-01-24 14:32 ` [PATCH 15/44] btrfs: hold a ref on the root in create_subvol Josef Bacik
2020-01-24 14:32 ` [PATCH 16/44] btrfs: hold a ref on the root in search_ioctl Josef Bacik
2020-01-24 14:32 ` [PATCH 17/44] btrfs: hold a ref on the root in btrfs_search_path_in_tree Josef Bacik
2020-02-05 14:30 ` David Sterba
2020-01-24 14:32 ` [PATCH 18/44] btrfs: hold a ref on the root in btrfs_search_path_in_tree_user Josef Bacik
2020-02-05 14:37 ` David Sterba
2020-01-24 14:32 ` [PATCH 19/44] btrfs: hold a ref on the root in btrfs_ioctl_get_subvol_info Josef Bacik
2020-01-24 14:32 ` [PATCH 20/44] btrfs: hold ref on root in btrfs_ioctl_default_subvol Josef Bacik
2020-01-24 14:32 ` [PATCH 21/44] btrfs: hold a ref on the root in build_backref_tree Josef Bacik
2020-02-05 14:46 ` David Sterba
2020-01-24 14:32 ` [PATCH 22/44] btrfs: hold a ref on the root in prepare_to_merge Josef Bacik
2020-02-05 14:52 ` David Sterba
2020-01-24 14:32 ` [PATCH 23/44] btrfs: hold a ref on the root in merge_reloc_roots Josef Bacik
2020-01-24 14:32 ` [PATCH 24/44] btrfs: hold a ref on the root in record_reloc_root_in_trans Josef Bacik
2020-01-24 14:32 ` [PATCH 25/44] btrfs: hold a ref on the root in find_data_references Josef Bacik
2020-01-24 14:32 ` [PATCH 26/44] btrfs: hold a ref on the root in create_reloc_inode Josef Bacik
2020-01-24 14:32 ` [PATCH 27/44] btrfs: hold a ref on the root in btrfs_recover_relocation Josef Bacik
2020-02-05 15:00 ` David Sterba
2020-02-06 16:26 ` David Sterba
2020-02-06 16:30 ` Josef Bacik
2020-01-24 14:32 ` [PATCH 28/44] btrfs: push grab_fs_root into read_fs_root Josef Bacik
2020-01-24 14:32 ` [PATCH 29/44] btrfs: hold a ref for the root in btrfs_find_orphan_roots Josef Bacik
2020-02-05 15:06 ` David Sterba
2020-01-24 14:32 ` [PATCH 30/44] btrfs: hold a ref on the root in scrub_print_warning_inode Josef Bacik
2020-01-24 14:32 ` [PATCH 31/44] btrfs: hold a ref on the root in btrfs_ioctl_send Josef Bacik
2020-02-05 15:16 ` David Sterba
2020-01-24 14:32 ` [PATCH 32/44] btrfs: hold a ref on the root in get_subvol_name_from_objectid Josef Bacik
2020-02-05 15:19 ` David Sterba
2020-02-06 15:24 ` [PATCH][v2] " Josef Bacik
2020-01-24 14:32 ` [PATCH 33/44] btrfs: hold a ref on the root in create_pending_snapshot Josef Bacik
2020-01-24 14:32 ` [PATCH 34/44] btrfs: hold a ref on the root in btrfs_recover_log_trees Josef Bacik
2020-01-24 14:32 ` [PATCH 35/44] btrfs: hold a ref on the root in btrfs_check_uuid_tree_entry Josef Bacik
2020-01-24 14:32 ` [PATCH 36/44] btrfs: move free_fs_info Josef Bacik
2020-01-24 14:52 ` Nikolay Borisov
2020-01-24 14:32 ` [PATCH 37/44] btrfs: hold a ref on the root in open_ctree Josef Bacik
2020-01-24 14:32 ` [PATCH 38/44] btrfs: use btrfs_put_fs_root to free roots always Josef Bacik
2020-01-24 14:32 ` [PATCH 39/44] btrfs: push btrfs_grab_fs_root into btrfs_get_fs_root Josef Bacik
2020-01-24 14:32 ` [PATCH 40/44] btrfs: free more things in btrfs_free_fs_info Josef Bacik
2020-01-24 14:32 ` [PATCH 41/44] btrfs: move fs_info init work into it's own helper function Josef Bacik
2020-01-24 14:32 ` [PATCH 42/44] btrfs: make the init of static elements in fs_info separate Josef Bacik
2020-01-24 14:33 ` [PATCH 43/44] btrfs: add a leak check for roots Josef Bacik
2020-01-24 14:33 ` [PATCH 44/44] btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root Josef Bacik
2020-02-05 15:44 ` David Sterba
2020-02-04 23:48 ` [PATCH 00/44][v5] Cleanup how we handle root refs, part 1 David Sterba
2020-02-05 15:48 ` David Sterba
2020-02-06 16:59 ` David Sterba
-- strict thread matches above, loose matches on Subject: below --
2019-12-06 14:44 [PATCH 0/44] " Josef Bacik
2019-12-06 14:45 ` [PATCH 12/44] btrfs: hold a root ref in btrfs_get_dentry Josef Bacik
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