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From: Omar Sandoval <osandov@osandov.com>
To: linux-btrfs@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Subject: [PATCH 4/9] btrfs: add send_stream_version attribute to sysfs
Date: Fri, 21 Aug 2020 00:39:54 -0700	[thread overview]
Message-ID: <742f77f23ac5bd5feec8edc0b88e122303faac0d.1597994106.git.osandov@osandov.com> (raw)
In-Reply-To: <cover.1597994106.git.osandov@osandov.com>

From: Omar Sandoval <osandov@fb.com>

This reports the latest send stream version supported by the kernel.

Signed-off-by: Omar Sandoval <osandov@fb.com>
---
 fs/btrfs/sysfs.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 8593086d1d10..34d21edff7d7 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -14,6 +14,7 @@
 #include "ctree.h"
 #include "discard.h"
 #include "disk-io.h"
+#include "send.h"
 #include "transaction.h"
 #include "sysfs.h"
 #include "volumes.h"
@@ -321,9 +322,17 @@ static ssize_t supported_checksums_show(struct kobject *kobj,
 }
 BTRFS_ATTR(static_feature, supported_checksums, supported_checksums_show);
 
+static ssize_t send_stream_version_show(struct kobject *kobj,
+					struct kobj_attribute *ka, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%d\n", BTRFS_SEND_STREAM_VERSION);
+}
+BTRFS_ATTR(static_feature, send_stream_version, send_stream_version_show);
+
 static struct attribute *btrfs_supported_static_feature_attrs[] = {
 	BTRFS_ATTR_PTR(static_feature, rmdir_subvol),
 	BTRFS_ATTR_PTR(static_feature, supported_checksums),
+	BTRFS_ATTR_PTR(static_feature, send_stream_version),
 	NULL
 };
 
-- 
2.28.0


  parent reply	other threads:[~2020-08-21  7:42 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-21  7:39 [PATCH 0/9] btrfs: implement send/receive of compressed extents without decompressing Omar Sandoval
2020-08-21  7:39 ` [PATCH 1/9] btrfs: send: get rid of i_size logic in send_write() Omar Sandoval
2020-08-21 17:26   ` Filipe Manana
2020-08-24 17:39   ` Josef Bacik
2020-08-21  7:39 ` [PATCH 2/9] btrfs: send: avoid copying file data Omar Sandoval
2020-08-21 17:29   ` Filipe Manana
2020-08-24 21:34     ` Omar Sandoval
2020-08-24 17:47   ` Josef Bacik
2020-09-11 14:13   ` David Sterba
2020-09-14 22:04     ` Omar Sandoval
2020-09-15  8:14       ` David Sterba
2020-08-21  7:39 ` [PATCH 3/9] btrfs: send: use btrfs_file_extent_end() in send_write_or_clone() Omar Sandoval
2020-08-21 17:30   ` Filipe Manana
2020-08-21  7:39 ` Omar Sandoval [this message]
2020-08-21  7:39 ` [PATCH 5/9] btrfs: add send stream v2 definitions Omar Sandoval
2020-08-24 17:49   ` Josef Bacik
2020-08-21  7:39 ` [PATCH 6/9] btrfs: send: write larger chunks when using stream v2 Omar Sandoval
2020-08-24 17:57   ` Josef Bacik
2020-08-21  7:39 ` [PATCH 7/9] btrfs: send: allocate send buffer with alloc_page() and vmap() for v2 Omar Sandoval
2020-08-21  7:39 ` [PATCH 8/9] btrfs: send: send compressed extents with encoded writes Omar Sandoval
2020-08-24 17:32   ` Josef Bacik
2020-08-24 17:52     ` Omar Sandoval
2020-08-21  7:39 ` [PATCH 9/9] btrfs: send: enable support for stream v2 and compressed writes Omar Sandoval
2020-08-21  7:40 ` [PATCH 01/11] btrfs-progs: receive: support v2 send stream larger tlv_len Omar Sandoval
2020-08-21  7:40 ` [PATCH 02/11] btrfs-progs: receive: dynamically allocate sctx->read_buf Omar Sandoval
2020-08-21  7:40 ` [PATCH 03/11] btrfs-progs: receive: support v2 send stream DATA tlv format Omar Sandoval
2020-08-21  7:40 ` [PATCH 04/11] btrfs-progs: receive: add send stream v2 cmds and attrs to send.h Omar Sandoval
2020-08-21  7:40 ` [PATCH 05/11] btrfs-progs: receive: add stub implementation for pwritev2 Omar Sandoval
2020-08-21  7:40 ` [PATCH 06/11] btrfs-progs: receive: process encoded_write commands Omar Sandoval
2020-08-21  7:40 ` [PATCH 07/11] btrfs-progs: receive: encoded_write fallback to explicit decode and write Omar Sandoval
2020-08-21  7:40 ` [PATCH 08/11] btrfs-progs: receive: process fallocate commands Omar Sandoval
2020-08-21  7:40 ` [PATCH 09/11] btrfs-progs: receive: process setflags ioctl commands Omar Sandoval
2020-08-21  7:40 ` [PATCH 10/11] btrfs-progs: send: stream v2 ioctl flags Omar Sandoval
2020-08-21  7:40 ` [PATCH 11/11] btrfs-progs: receive: add tests for basic encoded_write send/receive Omar Sandoval
2020-08-24 19:57 ` [PATCH 0/9] btrfs: implement send/receive of compressed extents without decompressing David Sterba
2020-08-24 22:16   ` Omar Sandoval
2020-09-10 11:28 ` David Sterba

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