From: Goffredo Baroncelli <kreijack@tiscali.it>
To: linux-btrfs@vger.kernel.org
Cc: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>,
Josef Bacik <josef@toxicpanda.com>,
David Sterba <dsterba@suse.cz>,
Sinnamohideen Shafeeq <shafeeqs@panasas.com>,
Goffredo Baroncelli <kreijack@inwind.it>
Subject: [PATCH 1/4] btrfs: add flags to give an hint to the chunk allocator
Date: Sun, 24 Oct 2021 17:31:04 +0200 [thread overview]
Message-ID: <39a928f4184beb1385076c80630ef78cee18755a.1635089352.git.kreijack@inwind.it> (raw)
In-Reply-To: <cover.1635089352.git.kreijack@inwind.it>
From: Goffredo Baroncelli <kreijack@inwind.it>
Add the following flags to give an hint about which chunk should be
allocated in which a disk.
The following flags are created:
- BTRFS_DEV_ALLOCATION_PREFERRED_DATA
preferred data chunk, but metadata chunk allowed
- BTRFS_DEV_ALLOCATION_PREFERRED_METADATA
preferred metadata chunk, but data chunk allowed
- BTRFS_DEV_ALLOCATION_METADATA_ONLY
only metadata chunk allowed
- BTRFS_DEV_ALLOCATION_DATA_ONLY
only data chunk allowed
Signed-off-by: Goffredo Baroncelli <kreijack@inwid.it>
---
include/uapi/linux/btrfs_tree.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
index ccdb40fe40dc..b45322b347c2 100644
--- a/include/uapi/linux/btrfs_tree.h
+++ b/include/uapi/linux/btrfs_tree.h
@@ -361,6 +361,20 @@ struct btrfs_key {
__u64 offset;
} __attribute__ ((__packed__));
+/* dev_item.type */
+
+/* btrfs chunk allocation hints */
+#define BTRFS_DEV_ALLOCATION_MASK_BIT_COUNT 3
+/* preferred data chunk, but metadata chunk allowed */
+#define BTRFS_DEV_ALLOCATION_PREFERRED_DATA (0ULL)
+/* preferred metadata chunk, but data chunk allowed */
+#define BTRFS_DEV_ALLOCATION_PREFERRED_METADATA (1ULL)
+/* only metadata chunk are allowed */
+#define BTRFS_DEV_ALLOCATION_METADATA_ONLY (2ULL)
+/* only data chunk allowed */
+#define BTRFS_DEV_ALLOCATION_DATA_ONLY (3ULL)
+/* 5..7 are unused values */
+
struct btrfs_dev_item {
/* the internal btrfs device id */
__le64 devid;
--
2.33.0
next prev parent reply other threads:[~2021-10-24 15:39 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-24 15:31 [RFC][V8][PATCH 0/5] btrfs: allocation_hint mode Goffredo Baroncelli
2021-10-24 15:31 ` Goffredo Baroncelli [this message]
2021-10-24 15:31 ` [PATCH 2/4] btrfs: export dev_item.type in /sys/fs/btrfs/<uuid>/devinfo/<devid>/type Goffredo Baroncelli
2021-10-24 15:31 ` [PATCH 3/4] btrfs: change the DEV_ITEM 'type' field via sysfs Goffredo Baroncelli
2021-10-24 15:31 ` [PATCH 4/4] btrfs: add allocator_hint mode Goffredo Baroncelli
2021-12-17 15:58 ` Hans van Kranenburg
2021-12-17 18:28 ` Goffredo Baroncelli
2021-12-17 19:41 ` Zygo Blaxell
2021-12-18 9:07 ` Goffredo Baroncelli
2021-12-18 22:48 ` Zygo Blaxell
2021-12-19 0:03 ` Graham Cobb
2021-12-19 2:30 ` Zygo Blaxell
2021-12-13 9:39 ` [RFC][V8][PATCH 0/5] btrfs: allocation_hint mode Paul Jones
2021-12-13 19:54 ` Goffredo Baroncelli
2021-12-13 21:15 ` Josef Bacik
2021-12-13 22:49 ` Zygo Blaxell
2021-12-14 14:31 ` Josef Bacik
2021-12-14 19:03 ` Goffredo Baroncelli
2021-12-14 20:04 ` Zygo Blaxell
2021-12-14 20:34 ` Josef Bacik
2021-12-14 20:41 ` Goffredo Baroncelli
2021-12-15 13:58 ` Josef Bacik
2021-12-15 18:53 ` Goffredo Baroncelli
2021-12-16 0:56 ` Josef Bacik
2021-12-17 5:40 ` Zygo Blaxell
2021-12-17 14:48 ` Josef Bacik
2021-12-17 16:31 ` Zygo Blaxell
2021-12-17 18:08 ` Goffredo Baroncelli
2021-12-16 2:30 ` Paul Jones
2021-12-14 1:03 ` Sinnamohideen, Shafeeq
2021-12-14 18:53 ` Goffredo Baroncelli
2021-12-14 20:35 ` Josef Bacik
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