From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 337A421D0DE61 for ; Wed, 15 May 2019 12:27:34 -0700 (PDT) From: Vivek Goyal Subject: [PATCH v2 20/30] fuse: Introduce setupmapping/removemapping commands Date: Wed, 15 May 2019 15:27:05 -0400 Message-Id: <20190515192715.18000-21-vgoyal@redhat.com> In-Reply-To: <20190515192715.18000-1-vgoyal@redhat.com> References: <20190515192715.18000-1-vgoyal@redhat.com> MIME-Version: 1.0 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-nvdimm@lists.01.org Cc: swhiteho@redhat.com, dgilbert@redhat.com, stefanha@redhat.com, miklos@szeredi.hu List-ID: Introduce two new fuse commands to setup/remove memory mappings. This will be used to setup/tear down file mapping in dax window. Signed-off-by: Vivek Goyal --- include/uapi/linux/fuse.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h index 2ac598614a8f..9eb313220549 100644 --- a/include/uapi/linux/fuse.h +++ b/include/uapi/linux/fuse.h @@ -399,6 +399,8 @@ enum fuse_opcode { FUSE_RENAME2 = 45, FUSE_LSEEK = 46, FUSE_COPY_FILE_RANGE = 47, + FUSE_SETUPMAPPING = 48, + FUSE_REMOVEMAPPING = 49, /* CUSE specific operations */ CUSE_INIT = 4096, @@ -822,4 +824,35 @@ struct fuse_copy_file_range_in { uint64_t flags; }; +#define FUSE_SETUPMAPPING_ENTRIES 8 +#define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0) +struct fuse_setupmapping_in { + /* An already open handle */ + uint64_t fh; + /* Offset into the file to start the mapping */ + uint64_t foffset; + /* Length of mapping required */ + uint64_t len; + /* Flags, FUSE_SETUPMAPPING_FLAG_* */ + uint64_t flags; + /* Offset in Memory Window */ + uint64_t moffset; +}; + +struct fuse_setupmapping_out { + /* Offsets into the cache of mappings */ + uint64_t coffset[FUSE_SETUPMAPPING_ENTRIES]; + /* Lengths of each mapping */ + uint64_t len[FUSE_SETUPMAPPING_ENTRIES]; +}; + +struct fuse_removemapping_in { + /* An already open handle */ + uint64_t fh; + /* Offset into the dax window start the unmapping */ + uint64_t moffset; + /* Length of mapping required */ + uint64_t len; +}; + #endif /* _LINUX_FUSE_H */ -- 2.20.1 _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm