From: Nikolay Borisov <nborisov@suse.com>
To: linux-btrfs@vger.kernel.org
Cc: Nikolay Borisov <nborisov@suse.com>
Subject: [PATCH v2 1/8] btrfs-progs: Add btrfs_is_empty_uuid
Date: Tue, 14 Sep 2021 12:05:51 +0300 [thread overview]
Message-ID: <20210914090558.79411-2-nborisov@suse.com> (raw)
In-Reply-To: <20210914090558.79411-1-nborisov@suse.com>
This utility function is needed by the RO->RW snapshot detection code.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
---
kernel-shared/ctree.h | 2 ++
kernel-shared/uuid-tree.c | 11 +++++++++++
2 files changed, 13 insertions(+)
diff --git a/kernel-shared/ctree.h b/kernel-shared/ctree.h
index 3cca60323e3d..f53436a7f38b 100644
--- a/kernel-shared/ctree.h
+++ b/kernel-shared/ctree.h
@@ -2860,6 +2860,8 @@ int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
u64 subvol_id_cpu);
+int btrfs_is_empty_uuid(u8 *uuid);
+
static inline int is_fstree(u64 rootid)
{
if (rootid == BTRFS_FS_TREE_OBJECTID ||
diff --git a/kernel-shared/uuid-tree.c b/kernel-shared/uuid-tree.c
index 21115a4d2d09..51a7b5d9ff5d 100644
--- a/kernel-shared/uuid-tree.c
+++ b/kernel-shared/uuid-tree.c
@@ -109,3 +109,14 @@ int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
BTRFS_UUID_KEY_RECEIVED_SUBVOL,
subvol_id);
}
+
+int btrfs_is_empty_uuid(u8 *uuid)
+{
+ int i;
+
+ for (i = 0; i < BTRFS_UUID_SIZE; i++) {
+ if (uuid[i])
+ return 0;
+ }
+ return 1;
+}
--
2.17.1
next prev parent reply other threads:[~2021-09-14 9:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-14 9:05 [PATCH v2 0/8] Implement progs support for removing received uuid on RW vols Nikolay Borisov
2021-09-14 9:05 ` Nikolay Borisov [this message]
2021-09-16 7:26 ` [PATCH v2 1/8] btrfs-progs: Add btrfs_is_empty_uuid Anand Jain
2021-09-20 11:41 ` David Sterba
2021-09-14 9:05 ` [PATCH v2 2/8] btrfs-progs: Remove root argument from btrfs_fixup_low_keys Nikolay Borisov
2021-09-14 9:05 ` [PATCH v2 3/8] btrfs-progs: Remove fs_info argument from leaf_data_end Nikolay Borisov
2021-09-14 9:05 ` [PATCH v2 4/8] btrfs-progs: Remove root argument from btrfs_truncate_item Nikolay Borisov
2021-09-14 9:05 ` [PATCH v2 5/8] btrfs-progs: Add btrfs_uuid_tree_remove Nikolay Borisov
2021-09-14 9:22 ` Qu Wenruo
2021-09-14 9:05 ` [PATCH v2 6/8] btrfs-progs: Implement helper to remove received information of RW subvol Nikolay Borisov
2021-09-14 9:23 ` Qu Wenruo
2021-09-14 9:05 ` [PATCH v2 7/8] btrfs-progs: check: Implement removing received data for RW subvols Nikolay Borisov
2021-09-14 9:25 ` Qu Wenruo
2021-09-14 9:55 ` Nikolay Borisov
2021-09-14 9:05 ` [PATCH v2 8/8] btrfs-progs: tests: Add test for received information removal Nikolay Borisov
2021-09-14 9:30 ` [PATCH v2 0/8] Implement progs support for removing received uuid on RW vols Qu Wenruo
2021-09-14 9:30 ` Qu Wenruo
2021-09-14 9:31 ` Nikolay Borisov
2021-09-21 18:51 ` David Sterba
2021-09-21 22:08 ` Graham Cobb
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