HardenedBSD/rescue
Martin Matuska 315ee00fa9 zfs: merge openzfs/zfs@804414aad
Notable upstream pull request merges:
  #15024 Add missed DMU_PROJECTUSED_OBJECT prefetch
  #15029 Do not request data L1 buffers on scan prefetch
  #15036 FreeBSD: catch up to __FreeBSD_version 1400093
  #15039 Fix raw receive with different indirect block size
  #15047 FreeBSD: Fix build on stable/13 after 1302506
  #15049 Fix the ZFS checksum error histograms with larger record sizes
  #15052 Reduce bloat in ereport.fs.zfs.checksum events
  #15056 Avoid extra snprintf() in dsl_deadlist_merge()
  #15061 Ignore pool ashift property during vdev attachment
  #15063 Don't panic if setting vdev properties is unsupported for this vdev type
  #15067 spa_min_alloc should be GCD, not min
  #15071 Add explicit prefetches to bpobj_iterate()
  #15072 Adjust prefetch parameters
  #15076 Refactor dmu_prefetch()
  #15079 set autotrim default to 'off' everywhere
  #15080 ZIL: Fix config lock deadlock
  #15088 metaslab: tuneable to better control force ganging
  #15096 Avoid waiting in dmu_sync_late_arrival()
  #15097 BRT should return EOPNOTSUPP
  #15103 Remove zl_issuer_lock from zil_suspend()
  #15107 Remove fastwrite mechanism
  #15113 libzfs: sendrecv: send_progress_thread: handle SIGINFO/SIGUSR1
  #15122 ZIL: Second attempt to reduce scope of zl_issuer_lock
  #15129 zpool_vdev_remove() should handle EALREADY error return
  #15132 ZIL: Replay blocks without next block pointer
  #15148 zfs_clone_range should return descriptive error codes
  #15153 ZIL: Avoid dbuf_read() before dmu_sync()
  #15172 copy_file_range: fix fallback when source create on same txg
  #15180 Update outdated assertion from zio_write_compress

Obtained from:	OpenZFS
OpenZFS commit:	804414aad2
2023-08-26 23:51:42 +02:00
..
librescue
rescue
Makefile
README

The /rescue build system here has three goals:

1) Produce a reliable standalone set of /rescue tools.

The contents of /rescue are all statically linked and do not depend on
anything in /bin or /sbin.  In particular, they'll continue to
function even if you've hosed your dynamic /bin and /sbin.  For
example, note that /rescue/mount runs /rescue/mount_nfs and not
/sbin/mount_nfs.  This is more subtle than it looks.

As an added bonus, /rescue is fairly small (thanks to crunchgen) and
includes a number of tools (such as gzip, bzip2, vi) that are not
normally found in /bin and /sbin.

2) Demonstrate robust use of crunchgen.

These Makefiles recompile each of the crunchgen components and include
support for overriding specific library entries.  Such techniques
should be useful elsewhere.

3) Produce a toolkit suitable for small distributions.

Install /rescue on a CD or CompactFlash disk, and symlink /bin and
/sbin to /rescue to produce a small and fairly complete FreeBSD
system.

These tools have one big disadvantage: being statically linked, they
cannot use some advanced library functions that rely on dynamic
linking.  In particular, nsswitch, locales, and pam all
rely on dynamic linking.


To compile:

# cd /usr/src/rescue
# make obj
# make
# make install

Note that rebuilds don't always work correctly; if you run into
trouble, try 'make clean' before recompiling.