lwn.git/include/linux/fuse.h, branch v2.6.27.50

fuse: nfs export special lookups

2008-07-25T17:53:48+00:00

Implement the get_parent export operation by sending a LOOKUP request with ".." as the name. Implement looking up an inode by node ID after it has been evicted from the cache. This is done by seding a LOOKUP request with "." as the name (for all file types, not just directories). The filesystem can set the FUSE_EXPORT_SUPPORT flag in the INIT reply, to indicate that it supports these special lookups. Thanks to John Muir for the original implementation of this feature. Signed-off-by: Miklos Szeredi Cc: "J. Bruce Fields" Cc: Trond Myklebust Cc: Matthew Wilcox Cc: David Teigland Cc: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fuse: add flag to turn on big writes

2008-05-13T15:02:26+00:00

Prior to 2.6.26 fuse only supported single page write requests. In theory all fuse filesystem should be able support bigger than 4k writes, as there's nothing in the API to prevent it. Unfortunately there's a known case in NTFS-3G where big writes cause filesystem corruption. There could also be other filesystems, where the lack of testing with big write requests would result in bugs. To prevent such problems on a kernel upgrade, disable big writes by default, but let filesystems set a flag to turn it on. Signed-off-by: Miklos Szeredi Cc: Szabolcs Szakacsits Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fuse: pass open flags to read and write

2007-11-29T17:24:54+00:00

Some open flags (O_APPEND, O_DIRECT) can be changed with fcntl(F_SETFL, ...) after open, but fuse currently only sends the flags to userspace in open. To make it possible to correcly handle changing flags, send the current value to userspace in each read and write. Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fuse: add blksize field to fuse_attr

2007-10-18T21:37:31+00:00

There are cases when the filesystem will be passed the buffer from a single read or write call, namely: 1) in 'direct-io' mode (not O_DIRECT), read/write requests don't go through the page cache, but go directly to the userspace fs 2) currently buffered writes are done with single page requests, but if Nick's ->perform_write() patch goes it, it will be possible to do larger write requests. But only if the original write() was also bigger than a page. In these cases the filesystem might want to give a hint to the app about the optimal I/O size. Allow the userspace filesystem to supply a blksize value to be returned by stat() and friends. If the field is zero, it defaults to the old PAGE_CACHE_SIZE value. Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fuse: add support for mandatory locking

2007-10-18T21:37:31+00:00

For mandatory locking the userspace filesystem needs to know the lock ownership for read, write and truncate operations. This patch adds the necessary fields to the protocol. Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fuse: add helper for asynchronous writes

2007-10-18T21:37:31+00:00

This patch adds a new helper function fuse_write_fill() which makes it possible to send WRITE requests asynchronously. A new flag for WRITE requests is also added which indicates that this a write from the page cache, and not a "normal" file write. This patch is in preparation for writable mmap support. Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fuse: support BSD locking semantics

2007-10-18T21:37:31+00:00

It is trivial to add support for flock(2) semantics to the existing protocol, by setting the lock owner field to the file pointer, and passing a new FUSE_LK_FLOCK flag with the locking request. Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fuse: add atomic open+truncate support

2007-10-18T21:37:31+00:00

This patch allows fuse filesystems to implement open(..., O_TRUNC) as a single request, instead of separate truncate and open requests. Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fuse: improve utimes support

2007-10-18T21:37:30+00:00

Add two new flags for setattr: FATTR_ATIME_NOW and FATTR_MTIME_NOW. These mean, that atime or mtime should be changed to the current time. Also it is now possible to update atime or mtime individually, not just together. Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fuse: add file handle to getattr operation

2007-10-18T21:37:30+00:00

Add necessary protocol changes for supplying a file handle with the getattr operation. Step the API version to 7.9. This patch doesn't actually supply the file handle, because that needs some kind of VFS support, which we haven't yet been able to agree upon. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds