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author | Miklos Szeredi <mszeredi@suse.cz> | 2010-07-12 14:41:40 +0200 |
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committer | Miklos Szeredi <mszeredi@suse.cz> | 2010-07-12 14:41:40 +0200 |
commit | 2d45ba381a74a743eeaa2b06c7c5c0d2bf73ba1a (patch) | |
tree | 8a195d072cab99c088004b74ac5889252f348542 /include/linux/fuse.h | |
parent | a1d75f258230b75d46aecdf28b2e732413028863 (diff) | |
download | linux-2d45ba381a74a743eeaa2b06c7c5c0d2bf73ba1a.tar.gz linux-2d45ba381a74a743eeaa2b06c7c5c0d2bf73ba1a.tar.bz2 linux-2d45ba381a74a743eeaa2b06c7c5c0d2bf73ba1a.zip |
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 <mszeredi@suse.cz>
Diffstat (limited to 'include/linux/fuse.h')
-rw-r--r-- | include/linux/fuse.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/fuse.h b/include/linux/fuse.h index a90bd49834aa..c3c578e09833 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 */ |