From: Omar Sandoval <osandov@osandov.com>
To: linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org,
Al Viro <viro@zeniv.linux.org.uk>,
Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>, Jann Horn <jannh@google.com>,
Amir Goldstein <amir73il@gmail.com>,
Aleksa Sarai <cyphar@cyphar.com>,
linux-api@vger.kernel.org, kernel-team@fb.com
Subject: [PATCH v7 15/15] btrfs: send: enable support for stream v2 and compressed writes
Date: Fri, 22 Jan 2021 12:47:02 -0800 [thread overview]
Message-ID: <faf1a40be59c6ffccdfdfc795b25829baa2a12fe.1611346574.git.osandov@fb.com> (raw)
In-Reply-To: <cover.1611346574.git.osandov@fb.com>
From: Omar Sandoval <osandov@fb.com>
Now that the new support is implemented, allow the ioctl to accept the
flags and update the version in sysfs.
Signed-off-by: Omar Sandoval <osandov@fb.com>
---
fs/btrfs/send.c | 10 +++++++++-
fs/btrfs/send.h | 2 +-
include/uapi/linux/btrfs.h | 4 +++-
3 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 7516eba701af..cb824d1271fa 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -671,7 +671,10 @@ static int send_header(struct send_ctx *sctx)
struct btrfs_stream_header hdr;
strcpy(hdr.magic, BTRFS_SEND_STREAM_MAGIC);
- hdr.version = cpu_to_le32(BTRFS_SEND_STREAM_VERSION);
+ if (sctx->flags & BTRFS_SEND_FLAG_STREAM_V2)
+ hdr.version = cpu_to_le32(2);
+ else
+ hdr.version = cpu_to_le32(1);
return write_buf(sctx->send_filp, &hdr, sizeof(hdr),
&sctx->send_off);
@@ -7446,6 +7449,11 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
ret = -EINVAL;
goto out;
}
+ if ((arg->flags & BTRFS_SEND_FLAG_COMPRESSED) &&
+ !(arg->flags & BTRFS_SEND_FLAG_STREAM_V2)) {
+ ret = -EINVAL;
+ goto out;
+ }
sctx = kzalloc(sizeof(struct send_ctx), GFP_KERNEL);
if (!sctx) {
diff --git a/fs/btrfs/send.h b/fs/btrfs/send.h
index 9f4f7b96b1eb..9c83e14a43b2 100644
--- a/fs/btrfs/send.h
+++ b/fs/btrfs/send.h
@@ -10,7 +10,7 @@
#include "ctree.h"
#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
-#define BTRFS_SEND_STREAM_VERSION 1
+#define BTRFS_SEND_STREAM_VERSION 2
/*
* In send stream v1, no command is larger than 64k. In send stream v2, no limit
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index 93aa0932234e..b12a9a1a106c 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -786,7 +786,9 @@ struct btrfs_ioctl_received_subvol_args {
#define BTRFS_SEND_FLAG_MASK \
(BTRFS_SEND_FLAG_NO_FILE_DATA | \
BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \
- BTRFS_SEND_FLAG_OMIT_END_CMD)
+ BTRFS_SEND_FLAG_OMIT_END_CMD | \
+ BTRFS_SEND_FLAG_STREAM_V2 | \
+ BTRFS_SEND_FLAG_COMPRESSED)
struct btrfs_ioctl_send_args {
__s64 send_fd; /* in */
--
2.30.0
prev parent reply other threads:[~2021-01-22 21:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1611346574.git.osandov@fb.com>
2021-01-22 20:46 ` [PATCH v7 11/15] btrfs: add send stream v2 definitions Omar Sandoval
2021-01-22 20:57 ` Omar Sandoval
2021-01-22 20:46 ` [PATCH v7 12/15] btrfs: send: write larger chunks when using stream v2 Omar Sandoval
2021-01-22 20:47 ` [PATCH v7 13/15] btrfs: send: allocate send buffer with alloc_page() and vmap() for v2 Omar Sandoval
2021-01-22 20:47 ` [PATCH v7 14/15] btrfs: send: send compressed extents with encoded writes Omar Sandoval
2021-01-22 20:47 ` Omar Sandoval [this message]
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