osxfuse/osxfuse osxfuse-3.4.1

FUSE for macOS 3.4.1

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Remove obsolete task working set cache handling

When mounting a volume with the noubc option the kernel extension used to set the noexec flag for the mount in order to also disable the task working set page cache on disk. However, since the task working set mechanism has been removed in Mac OS X 10.5 the noexec flag is no longer needed.

Ignore vnode name cache hits when creating a file

See osxfuse/kext#4 for details.

Always set O_EXCL for FUSE_CREATE requests

The macOS kernel expects all create calls to return EEXIST in case the file already exists, regardless of whether O_EXCL was specified or not.

Resolves #209

Add mount-time option excl_create

If the mount-time option excl_create is specified, the O_EXCL flag will only be set for "truly" exclusive creates, i.e. create calls for which the initiator explicitly set the O_EXCL flag. This allows distributed file systems to determine whether or not to acquire a potentially costly lock to prevent remote create races. Nonetheless, the file system still needs to make sure that there are no local create races.

Fix mount-time option parsing

Fixes the following error when using the daemon_timeout mount-time option in combination with a volume name containing the word "union".

mount_osxfuse: invalid value for argument daemon_timeout

Don't kill the file system on short reads

A FUSE user space server receives file system requests from the FUSE device by allocating some memory and calling read(2). Obviously, the request must fit into that buffer. If it doesn't, we used to kill the file system.

Linux FUSE handles short reads differently. Instead of killing the file system it returns EIO or E2BIG (in case of FUSE_SETXATTR requests). This change aims to replicate the Linux behavior on macOS.

Addresses #293

Remove callbacks for interrupted tickets

Make sure to remove a ticket's callback when marking it as answered. Otherwise the ticket will be retained by the callback queue until the volume is unmounted.

Minor optimizations and code cleanup

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