⬢ DragonFlyBSD Kernel Audit
DF-2462 / gen.sh
← back to finding ↓ download raw 
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
#!/bin/sh
# gen.sh -- run ON THE GUEST. Concatenates the DF-2462 harness around
# VERBATIM copies of the iscsi initiator sources:
#
#   df_pre.c
#   + <verbatim dev/disk/iscsi/initiator/isc_sm.c>          (whole file)
#   + <verbatim isc_cam.c: ic_lost_target>   (by function name)
#   + <verbatim isc_cam.c: _inq>
#   + <verbatim isc_cam.c: _scsi_encap>
#   + <verbatim isc_cam.c: ic_action>
#   + <verbatim iscsi_subr.c: dwl>
#   + <verbatim iscsi_subr.c: scsi_encap>
#   + <verbatim isc_subr.c: i_freeopt>
#   + df_post.c
#
# -> dev/disk/iscsi/initiator/dfiscsi_harness.c, registered in
# conf/files as "standard" (the X86_64_GENERIC kernel does not
# configure "device iscsi_initiator"; conf/files marks all iscsi
# initiator files "optional iscsi_initiator scbus", so the verbatim
# copies inside the harness TU are the only compiled instances).
#
# Functions are extracted BY NAME (line ranges shift between the
# baseline and fix.diff-patched sources; the names do not).  The
# driver text is byte-for-byte from the source file -- build.sh's
# sha256 gate pins the pristine tree (via the .orig copies made by
# the first gen.sh run); make_fixed.sh pins the patched tree.
set -e
cd /usr/src/sys/dev/disk/iscsi/initiator

# keep pristine originals (build.sh gates their sha256)
for f in isc_sm.c isc_cam.c iscsi_subr.c isc_subr.c iscsi.c iscsi.h iscsivar.h; do
  [ -f "$f.orig" ] || cp -n "$f" "$f.orig"
done

# the empty option header the kernel build would normally generate
[ -f opt_iscsi_initiator.h ] || : > opt_iscsi_initiator.h

# getfn <file> <funcname>: prints the function definition, starting
# at its preceding type line ("void", "int", "static void", ...),
# through its column-0 closing brace.  Driver style keeps nested
# braces indented, so a col-0 "}" only closes the function.
getfn() {
  # match the function NAME at column 0 followed by '(' -- no regex
  # (DF awk's -v mangles backslashes)
  awk -v fn="$2" '
    substr($0, 1, length(fn)) == fn && substr($0, length(fn)+1, 1) == "(" \
	&& !printing { printing = 1; print prev; print; next }
    { if (!printing) prev = $0 }
    printing { print; if ($0 == "}") exit }
  ' "$1"
}

{
  cat df_pre.c
  cat isc_sm.c
  getfn isc_cam.c ic_lost_target
  getfn isc_cam.c _inq
  getfn isc_cam.c _scsi_encap
  getfn isc_cam.c ic_action
  getfn iscsi_subr.c dwl
  getfn iscsi_subr.c scsi_encap
  getfn isc_subr.c i_freeopt
  cat df_post.c
} > dfiscsi_harness.c

cd /usr/src/sys
grep -q 'dfiscsi_harness' conf/files || \
    printf 'dev/disk/iscsi/initiator/dfiscsi_harness.c\t\tstandard\n' >> conf/files

echo "generated dev/disk/iscsi/initiator/dfiscsi_harness.c" \
     "($(wc -l < dev/disk/iscsi/initiator/dfiscsi_harness.c) lines)"
echo "  slices (lines): ic_lost_target=$(getfn isc_cam.c ic_lost_target | wc -l)" \
     "_inq=$(getfn isc_cam.c _inq | wc -l)" \
     "_scsi_encap=$(getfn isc_cam.c _scsi_encap | wc -l)" \
     "ic_action=$(getfn isc_cam.c ic_action | wc -l)" \
     "dwl=$(getfn iscsi_subr.c dwl | wc -l)" \
     "scsi_encap=$(getfn iscsi_subr.c scsi_encap | wc -l)" \
     "i_freeopt=$(getfn isc_subr.c i_freeopt | wc -l)"
grep -n 'dfiscsi_harness' conf/files