Commit 875c627c authored by Wang Yugui's avatar Wang Yugui Committed by David Sterba
Browse files

btrfs: send add define for v2 buffer size 



Add a define for the data buffer size (though the maximum size is not
limited by it) BTRFS_SEND_BUF_SIZE_V2 so it's more visible.

Signed-off-by: default avatarWang Yugui <wangyugui@e16-tech.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent b307f06d

fs/btrfs/send.c

+1 −1
Original line number Diff line number Diff line
@@ -7901,7 +7901,7 @@ long btrfs_ioctl_send(struct inode *inode, struct btrfs_ioctl_send_args *arg) 
	if (sctx->proto >= 2) {

		u32 send_buf_num_pages;



		sctx->send_max_size = ALIGN(SZ_16K + BTRFS_MAX_COMPRESSED, PAGE_SIZE);

		sctx->send_max_size = BTRFS_SEND_BUF_SIZE_V2;

		sctx->send_buf = vmalloc(sctx->send_max_size);

		if (!sctx->send_buf) {

			ret = -ENOMEM;

fs/btrfs/send.h

+4 −2
Original line number Diff line number Diff line
@@ -18,10 +18,12 @@ 
#endif



/*

 * In send stream v1, no command is larger than 64K. In send stream v2, no limit

 * should be assumed.

 * In send stream v1, no command is larger than 64K. In send stream v2, no

 * limit should be assumed, the buffer size is set to be a header with

 * compressed extent size.

 */

#define BTRFS_SEND_BUF_SIZE_V1				SZ_64K

#define BTRFS_SEND_BUF_SIZE_V2	ALIGN(SZ_16K + BTRFS_MAX_COMPRESSED, PAGE_SIZE)



struct inode;

struct btrfs_ioctl_send_args;