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6 Commits

Author SHA1 Message Date
Miklos Szeredi
1f4e9d03d1 fuse: rearrange and resize fuse_args fields 
This makes the structure better packed.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
 2019-09-10 16:29:48 +02:00
Miklos Szeredi
d5b4854357 fuse: flatten 'struct fuse_args' 
...to make future expansion simpler.  The hiearachical structure is a
historical thing that does not serve any practical purpose.

The generated code is excatly the same before and after the patch.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
 2019-09-10 16:29:48 +02:00
Eric W. Biederman
e45b2546e2 fuse: Ensure posix acls are translated outside of init_user_ns 
Ensure the translation happens by failing to read or write
posix acls when the filesystem has not indicated it supports
posix acls.

This ensures that modern cached posix acl support is available
and used when dealing with posix acls.  This is important
because only that path has the code to convernt the uids and
gids in posix acls into the user namespace of a fuse filesystem.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
 2018-05-31 12:26:10 +02:00
Miklos Szeredi
63401ccdb2 fuse: limit xattr returned size 
Don't let userspace filesystem give bogus values for the size of xattr and
xattr list.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
 2016-10-03 11:06:05 +02:00
Seth Forshee
60bcc88ad1 fuse: Add posix ACL support 
Add a new INIT flag, FUSE_POSIX_ACL, for negotiating ACL support with
userspace.  When it is set in the INIT response, ACL support will be
enabled.  ACL support also implies "default_permissions".

When ACL support is enabled, the kernel will cache and have responsibility
for enforcing ACLs.  ACL xattrs will be passed to userspace, which is
responsible for updating the ACLs in the filesystem, keeping the file mode
in sync, and inheritance of default ACLs when new filesystem nodes are
created.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
 2016-10-01 07:32:32 +02:00
Seth Forshee
703c73629f fuse: Use generic xattr ops 
In preparation for posix acl support, rework fuse to use xattr handlers and
the generic setxattr/getxattr/listxattr callbacks.  Split the xattr code
out into it's own file, and promote symbols to module-global scope as
needed.

Functionally these changes have no impact, as fuse still uses a single
handler for all xattrs which uses the old callbacks.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
 2016-10-01 07:32:32 +02:00