4 # srcdiff is used to compare current user level code with the current
5 # kernel code and advise of any differences between files which are
6 # sharing some or all of their content.
8 # There are two classes of sharing which we will check - header files
9 # in the include directory, which must be exactly the same (use diff)
10 # and source files which contain routines which must be exactly the
11 # same (but the userland file is always a subset of the kernel file,
12 # and hence a more flexible mechanism to "diff" is required).
14 # NB: to cross check that srcdiff is finding all the functions in the
15 # user source file, providing you have "mkproto" installed, you
16 # can "cd xfsprogs/libxfs" and cut&paste this in a bourne shell:
17 # $ for file in xfs_*.c; do
18 # > mkproto -nps < $file | perl -ne '
19 # > END { print " $count\t- " }
20 # > s/^.* (xfs\w+|\*xfs\w+|xlog\w+|\*xlog\w+) \(.*/\1/ && { $count++ }'
23 # (compare this to "srcdiff | fgrep Total:")
26 die "WORKAREA not set" unless defined $ENV{'WORKAREA'};
27 die "KWORKAREA not set" unless defined $ENV{'KWORKAREA'};
28 chdir $ENV{'WORKAREA'};
29 my $kworkarea = $ENV{'KWORKAREA'};
30 my $xdiff = $ENV{'XDIFF'};
38 print STDERR "Illegal option $_\n";
44 print STDERR "Usage: $0 [-q]\n";
48 my @pkglist = qw( xfstests attr acl dmapi xfsdump xfsprogs );
50 xfs_ag.h xfs_alloc.h xfs_alloc_btree.h xfs_arch.h
51 xfs_attr_leaf.h xfs_attr_sf.h xfs_bit.h xfs_bmap.h
52 xfs_bmap_btree.h xfs_btree.h xfs_buf_item.h
53 xfs_da_btree.h xfs_dfrag.h xfs_dinode.h xfs_dir.h
54 xfs_dir2.h xfs_dir2_block.h xfs_dir2_data.h
55 xfs_dir2_leaf.h xfs_dir2_node.h xfs_dir2_sf.h
56 xfs_dir_leaf.h xfs_dir_sf.h xfs_extfree_item.h xfs_ialloc.h
57 xfs_imap.h xfs_ialloc_btree.h xfs_inode.h xfs_inode_item.h
58 xfs_inum.h xfs_log.h xfs_log_priv.h xfs_log_recover.h
59 xfs_mount.h xfs_quota.h xfs_rtalloc.h
60 xfs_sb.h xfs_trans.h xfs_trans_space.h xfs_types.h
61 xfs_fs.h xfs_acl.h xfs_cap.h xfs_mac.h
65 my ( $file, $prefix1, $prefix2 ) = @_;
67 `diff $prefix1/$file $prefix2/$file >/dev/null 2>&1`;
69 print sprintf("\t%-35s ... ", $file);
70 if ($? != 0) { printf("FAILED\n(%s/%s differs to %s/%s)\n",
71 $prefix1, $file, $prefix2, $file); }
72 else { print "ok\n"; }
75 printf("\t%-35s ... FAILED\n(%s/%s differs to %s/%s)\n",
76 $file, $prefix1, $file, $prefix2, $file);
81 # xfstests directory m4 directory is a repository of all of the
82 # custom m4 macros used in the packages we look after.
87 foreach (`ls $package/m4/*.m4`) {
88 my $m4 = `basename $_`;
90 straightdiff $m4, "$package/m4", "xfstests/m4";
94 my $first = shift @pkglist;
96 print "\n=== Checking $_ package ===\n";
98 straightdiff 'buildrules', "$first/include", "$_/include";
99 straightdiff 'buildmacros', "$first/include", "$_/include";
100 straightdiff 'Makefile', "$first/build", "$_/build";
101 straightdiff 'Makefile', "$first/build/rpm", "$_/build/rpm";
102 straightdiff 'Makefile', "$first/build/tar", "$_/build/tar";
104 print "\n=== Checking headers ===\n";
105 foreach (@difflist) {
106 straightdiff $_, 'xfsprogs/include', "$kworkarea/fs/xfs";
108 straightdiff 'dmapi_kern.h', 'dmapi/include', "$kworkarea/fs/xfs/dmapi";
109 straightdiff 'dmapi.h', 'dmapi/include', "$kworkarea/fs/xfs/dmapi";
113 # Implements a tri-state FSA, see comments for state transitions
114 # (knows about the way the XFS kernel code is written, & makes
115 # some assumptions so as to not need to parse generic C code).
116 # Accepts one line at a time from a source file, picking out the
117 # function bodies so they can be subsequently compared.
120 my $line; # line number in current source file
121 my $state; # current FSA state
122 my $funcbody; # current function body (contents)
125 my ( $newline ) = @_;
129 # if line looks like start of a function, transition to 1
130 # & squirrel line away as line 1 of current function
132 if ($newline =~ m/^[xfs|xlog]/) {
134 $funcbody = $newline;
139 # if line looks like start of a function, stay here
140 # & squirrel line away as line 1 of current function
141 # otherwise if line isn't start of function body,
142 # squirrel line away as next line of current function
143 # (args/..., but not sure this is a real function yet)
144 # otherwise (start of function)
145 # squirrel line away as next line of current function
146 # transition to state 2
147 elsif ($state == 1) {
148 if ($newline =~ m/^[xfs|xlog]/) {
149 $funcbody = $newline;
151 elsif ($newline =~ m/^\{/) {
153 $funcbody .= $newline;
158 # if line looks like end of function body,
159 # squirrel line away as last line of current function
160 # tell someone we have a complete function ready
161 # transition to state 0
163 # squirrel line away as next line of current function
164 elsif ($state == 2) {
165 $funcbody .= $newline;
166 if ($newline =~ m/^\}/) {
173 die "unknown state transition";
175 return undef; # i.e. not at end of a function
185 open(USER, "$file") || die "cannot open $file";
187 my $func = setstate($_);
188 push @funcs, $func if (defined($func)); # store function away
201 open(KERN, "$file") || die "cannot open $file";
203 my $func = setstate($_);
204 if (defined($func)) {
205 $func =~ m/^([xfs|xlog]\w+)\s*\(/;
206 next unless defined($1);
208 if (defined($func)) {
209 $funcs{$name} = $func; # store function away
218 my ( $sa, $sb ) = @_;
220 return unless defined($xdiff);
222 open(FILEA, "> /tmp/diff.user.$$") || die "cannot write to /tmp/diff.user.$$";
223 open(FILEB, "> /tmp/diff.kern.$$") || die "cannot write to /tmp/diff.kern.$$";
228 `$xdiff /tmp/diff.user.$$ /tmp/diff.kern.$$`;
229 unlink ("/tmp/diff.user.$$","/tmp/diff.kern.$$");
233 my ( $file, $prefix1, $prefix2 ) = @_;
239 print "\n=== Checking $file routines ===\n" unless ($quiet);
241 # iterate over user funcs, match up to kernel funcs
243 my @user = listfuncs "$prefix1/$file";
244 my %kern = hashfuncs "$prefix2/$file";
246 foreach my $userfunc (@user) {
248 $userfunc =~ m/^([xfs|xlog]\w+)\s*\(/;
249 next unless (defined($1));
253 if (exists($kern{$name})) {
254 if ($userfunc ne $kern{$name}) {
255 print "\n=== $file routines ===\n"
256 if (!$found++ && $quiet);
258 printf("\t%-35s ... ", $name);
260 diffme $userfunc, $kern{$name};
263 printf("\t%-35s ... ", $name);
268 print "Cannot find kernel function $userfunc";
269 print " in file $prefix2/$file\n";
272 ($count != 1) && ( $plural = 's' );
273 print "( Total: $count routine$plural checked in $file )\n" unless ($quiet);
276 # xfsprogs/{libxfs,libxlog}/* fs/xfs/*
278 xfs_alloc.c xfs_alloc_btree.c xfs_attr_leaf.c
279 xfs_bmap.c xfs_bmap_btree.c xfs_btree.c xfs_da_btree.c
280 xfs_dir.c xfs_dir2.c xfs_dir2_block.c xfs_dir2_data.c
281 xfs_dir2_leaf.c xfs_dir2_node.c xfs_dir2_sf.c
282 xfs_dir_leaf.c xfs_ialloc.c xfs_ialloc_btree.c
283 xfs_inode.c xfs_rtalloc.c xfs_mount.c xfs_trans.c
286 print "\n=== Checking libxfs code ===\n";
287 foreach (@funclist) {
288 functiondiff $_, 'xfsprogs/libxfs', "$kworkarea/fs/xfs";
290 print "\n=== Checking libxlog code ===\n";
291 functiondiff 'xfs_log_recover.c', 'xfsprogs/libxlog', "$kworkarea/fs/xfs";