From a1d75f258230b75d46aecdf28b2e732413028863 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Mon, 12 Jul 2010 14:41:40 +0200 Subject: fuse: add store request Userspace filesystem can request data to be stored in the inode's mapping. This request is synchronous and has no reply. If the write to the fuse device returns an error then the store request was not fully completed (but may have updated some pages). If the stored data overflows the current file size, then the size is extended, similarly to a write(2) on the filesystem. Pages which have been completely stored are marked uptodate. Signed-off-by: Miklos Szeredi --- include/linux/fuse.h | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/fuse.h b/include/linux/fuse.h index 88e0eb59691..a90bd49834a 100644 --- a/include/linux/fuse.h +++ b/include/linux/fuse.h @@ -37,6 +37,9 @@ * * 7.14 * - add splice support to fuse device + * + * 7.15 + * - add store notify */ #ifndef _LINUX_FUSE_H @@ -68,7 +71,7 @@ #define FUSE_KERNEL_VERSION 7 /** Minor version number of this interface */ -#define FUSE_KERNEL_MINOR_VERSION 14 +#define FUSE_KERNEL_MINOR_VERSION 15 /** The node ID of the root inode */ #define FUSE_ROOT_ID 1 @@ -260,6 +263,7 @@ enum fuse_notify_code { FUSE_NOTIFY_POLL = 1, FUSE_NOTIFY_INVAL_INODE = 2, FUSE_NOTIFY_INVAL_ENTRY = 3, + FUSE_NOTIFY_STORE = 4, FUSE_NOTIFY_CODE_MAX, }; @@ -568,4 +572,11 @@ struct fuse_notify_inval_entry_out { __u32 padding; }; +struct fuse_notify_store_out { + __u64 nodeid; + __u64 offset; + __u32 size; + __u32 padding; +}; + #endif /* _LINUX_FUSE_H */ -- cgit v1.2.3-18-g5258 From 2d45ba381a74a743eeaa2b06c7c5c0d2bf73ba1a Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Mon, 12 Jul 2010 14:41:40 +0200 Subject: fuse: add retrieve request Userspace filesystem can request data to be retrieved from the inode's mapping. This request is synchronous and the retrieved data is queued as a new request. If the write to the fuse device returns an error then the retrieve request was not completed and a reply will not be sent. Only present pages are returned in the retrieve reply. Retrieving stops when it finds a non-present page and only data prior to that is returned. This request doesn't change the dirty state of pages. Signed-off-by: Miklos Szeredi --- include/linux/fuse.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'include') diff --git a/include/linux/fuse.h b/include/linux/fuse.h index a90bd49834a..c3c578e0983 100644 --- a/include/linux/fuse.h +++ b/include/linux/fuse.h @@ -40,6 +40,7 @@ * * 7.15 * - add store notify + * - add retrieve notify */ #ifndef _LINUX_FUSE_H @@ -254,6 +255,7 @@ enum fuse_opcode { FUSE_DESTROY = 38, FUSE_IOCTL = 39, FUSE_POLL = 40, + FUSE_NOTIFY_REPLY = 41, /* CUSE specific operations */ CUSE_INIT = 4096, @@ -264,6 +266,7 @@ enum fuse_notify_code { FUSE_NOTIFY_INVAL_INODE = 2, FUSE_NOTIFY_INVAL_ENTRY = 3, FUSE_NOTIFY_STORE = 4, + FUSE_NOTIFY_RETRIEVE = 5, FUSE_NOTIFY_CODE_MAX, }; @@ -579,4 +582,22 @@ struct fuse_notify_store_out { __u32 padding; }; +struct fuse_notify_retrieve_out { + __u64 notify_unique; + __u64 nodeid; + __u64 offset; + __u32 size; + __u32 padding; +}; + +/* Matches the size of fuse_write_in */ +struct fuse_notify_retrieve_in { + __u64 dummy1; + __u64 offset; + __u32 size; + __u32 dummy2; + __u64 dummy3; + __u64 dummy4; +}; + #endif /* _LINUX_FUSE_H */ -- cgit v1.2.3-18-g5258