tarfs: 'struct tarfs_fid': Switch 'gen' to 'u_int', avoid packing

As the 'gen' field in 'struct tarfs_node' (and then 'struct tarfs_fid')
is filled with arc4random() which returns an unsigned int, c

tarfs: 'struct tarfs_fid': Switch 'gen' to 'u_int', avoid packing

As the 'gen' field in 'struct tarfs_node' (and then 'struct tarfs_fid')
is filled with arc4random() which returns an unsigned int, change its
type in both structures. This allows reordering fields in 'struct
tarfs_fid' to reduce its size, finally avoiding the use of '__packed' to
ensure it fits into 'struct fid'.

While here, remove the 'data0' field which wasn't necessary from the
start.

Reviewed by: markj, rmacklem, des
Approved by: markj (mentor)
MFC after: 5 days
Differential Revision: https://reviews.freebsd.org/D47954

show more ...

tarfs: Fix the size of struct tarfs_fid and add a static assert

File system specific *fid structures are copied into the generic
struct fid defined in sys/mount.h.
As such, they cannot be larger tha

tarfs: Fix the size of struct tarfs_fid and add a static assert

File system specific *fid structures are copied into the generic
struct fid defined in sys/mount.h.
As such, they cannot be larger than struct fid.

This patch packs the structure and checks via a __Static_assert().

Reviewed by: markj
MFC after: 2 weeks

show more ...

vfs: use __enum_uint8 for vtype and vstate

This whacks hackery around only reading v_type once.

Bump __FreeBSD_version to 1400093

tarfs: Remove unused code.

Sponsored by: Juniper Networks, Inc.
Sponsored by: Klara, Inc.

Add tarfs, a filesystem backed by tarballs.

Sponsored by: Juniper Networks, Inc.
Sponsored by: Klara, Inc.
Reviewed by: pauamma, imp
Differential Revision: https://reviews.freebsd.org/D37753