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 cmd/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 chdir $ENV{'WORKAREA'};
28 my $xdiff = $ENV{'XDIFF'};
36 print STDERR "Illegal option $_\n";
42 print STDERR "Usage: $0 [-q]\n";
46 my @pkglist = qw( xfstests attr acl dmapi xfsdump xfsprogs );
48 xfs_ag.h xfs_alloc.h xfs_alloc_btree.h xfs_arch.h
49 xfs_attr_leaf.h xfs_attr_sf.h xfs_bit.h xfs_bmap.h
50 xfs_bmap_btree.h xfs_btree.h xfs_buf_item.h
51 xfs_da_btree.h xfs_dfrag.h xfs_dinode.h xfs_dir.h
52 xfs_dir2.h xfs_dir2_block.h xfs_dir2_data.h
53 xfs_dir2_leaf.h xfs_dir2_node.h xfs_dir2_sf.h
54 xfs_dir_leaf.h xfs_dir_sf.h xfs_extfree_item.h xfs_ialloc.h
55 xfs_imap.h xfs_ialloc_btree.h xfs_inode.h xfs_inode_item.h
56 xfs_inum.h xfs_log.h xfs_log_priv.h xfs_log_recover.h
57 xfs_mount.h xfs_quota.h xfs_rtalloc.h
58 xfs_sb.h xfs_trans.h xfs_trans_space.h xfs_types.h
59 xfs_fs.h xfs_acl.h xfs_cap.h xfs_mac.h
63 my ( $file, $prefix1, $prefix2 ) = @_;
65 `diff $prefix1/$file $prefix2/$file >/dev/null 2>&1`;
67 print sprintf("\t%-35s ... ", $file);
68 if ($? != 0) { printf("FAILED\n(%s/%s differs to %s/%s)\n",
69 $prefix1, $file, $prefix2, $file); }
70 else { print "ok\n"; }
73 printf("\t%-35s ... FAILED\n(%s/%s differs to %s/%s)\n",
74 $file, $prefix1, $file, $prefix2, $file);
79 # xfstests directory m4 directory is a repository of all of the
80 # custom m4 macros used in the packages we look after.
85 foreach (`ls cmd/$package/m4/*.m4`) {
86 my $m4 = `basename $_`;
88 straightdiff $m4, "cmd/$package/m4", "cmd/xfstests/m4";
92 my $first = shift @pkglist;
94 print "\n=== Checking $_ package ===\n";
96 straightdiff 'buildrules', "cmd/$first/include", "cmd/$_/include";
97 straightdiff 'buildmacros', "cmd/$first/include", "cmd/$_/include";
98 straightdiff 'Makefile', "cmd/$first/build", "cmd/$_/build";
99 straightdiff 'Makefile', "cmd/$first/build/rpm", "cmd/$_/build/rpm";
100 straightdiff 'Makefile', "cmd/$first/build/tar", "cmd/$_/build/tar";
102 print "\n=== Checking headers ===\n";
103 foreach (@difflist) {
104 straightdiff $_, 'cmd/xfsprogs/include', 'linux/fs/xfs';
106 straightdiff 'dmapi_kern.h', 'cmd/dmapi/include', 'linux/fs/xfs/dmapi';
107 straightdiff 'dmapi.h', 'cmd/dmapi/include', 'linux/fs/xfs/dmapi';
111 # Implements a tri-state FSA, see comments for state transitions
112 # (knows about the way the XFS kernel code is written, & makes
113 # some assumptions so as to not need to parse generic C code).
114 # Accepts one line at a time from a source file, picking out the
115 # function bodies so they can be subsequently compared.
118 my $line; # line number in current source file
119 my $state; # current FSA state
120 my $funcbody; # current function body (contents)
123 my ( $newline ) = @_;
127 # if line looks like start of a function, transition to 1
128 # & squirrel line away as line 1 of current function
130 if ($newline =~ m/^[xfs|xlog]/) {
132 $funcbody = $newline;
137 # if line looks like start of a function, stay here
138 # & squirrel line away as line 1 of current function
139 # otherwise if line isn't start of function body,
140 # squirrel line away as next line of current function
141 # (args/..., but not sure this is a real function yet)
142 # otherwise (start of function)
143 # squirrel line away as next line of current function
144 # transition to state 2
145 elsif ($state == 1) {
146 if ($newline =~ m/^[xfs|xlog]/) {
147 $funcbody = $newline;
149 elsif ($newline =~ m/^\{/) {
151 $funcbody .= $newline;
156 # if line looks like end of function body,
157 # squirrel line away as last line of current function
158 # tell someone we have a complete function ready
159 # transition to state 0
161 # squirrel line away as next line of current function
162 elsif ($state == 2) {
163 $funcbody .= $newline;
164 if ($newline =~ m/^\}/) {
171 die "unknown state transition";
173 return undef; # i.e. not at end of a function
183 open(USER, "$file") || die "cannot open $file";
185 my $func = setstate($_);
186 push @funcs, $func if (defined($func)); # store function away
199 open(KERN, "$file") || die "cannot open $file";
201 my $func = setstate($_);
202 if (defined($func)) {
203 $func =~ m/^([xfs|xlog]\w+)\s*\(/;
204 next unless defined($1);
206 if (defined($func)) {
207 $funcs{$name} = $func; # store function away
216 my ( $sa, $sb ) = @_;
218 return unless defined($xdiff);
220 open(FILEA, "> /tmp/diff.user.$$") || die "cannot write to /tmp/diff.user.$$";
221 open(FILEB, "> /tmp/diff.kern.$$") || die "cannot write to /tmp/diff.kern.$$";
226 `$xdiff /tmp/diff.user.$$ /tmp/diff.kern.$$`;
227 unlink ("/tmp/diff.user.$$","/tmp/diff.kern.$$");
231 my ( $file, $prefix1, $prefix2 ) = @_;
237 print "\n=== Checking $file routines ===\n" unless ($quiet);
239 # iterate over user funcs, match up to kernel funcs
241 my @user = listfuncs "$prefix1/$file";
242 my %kern = hashfuncs "$prefix2/$file";
244 foreach my $userfunc (@user) {
246 $userfunc =~ m/^([xfs|xlog]\w+)\s*\(/;
247 next unless (defined($1));
251 if (exists($kern{$name})) {
252 if ($userfunc ne $kern{$name}) {
253 print "\n=== $file routines ===\n"
254 if (!$found++ && $quiet);
256 printf("\t%-35s ... ", $name);
258 diffme $userfunc, $kern{$name};
261 printf("\t%-35s ... ", $name);
266 print "Cannot find kernel function $userfunc";
267 print " in file $prefix2/$file\n";
270 ($count != 1) && ( $plural = 's' );
271 print "( Total: $count routine$plural checked in $file )\n" unless ($quiet);
274 # cmd/xfsprogs/{libxfs,libxlog}/* fs/xfs/*
276 xfs_alloc.c xfs_alloc_btree.c xfs_attr_leaf.c
277 xfs_bmap.c xfs_bmap_btree.c xfs_btree.c xfs_da_btree.c
278 xfs_dir.c xfs_dir2.c xfs_dir2_block.c xfs_dir2_data.c
279 xfs_dir2_leaf.c xfs_dir2_node.c xfs_dir2_sf.c
280 xfs_dir_leaf.c xfs_ialloc.c xfs_ialloc_btree.c
281 xfs_inode.c xfs_rtalloc.c xfs_mount.c xfs_trans.c
284 print "\n=== Checking libxfs code ===\n";
285 foreach (@funclist) {
286 functiondiff $_, 'cmd/xfsprogs/libxfs', 'linux/fs/xfs';
288 print "\n=== Checking libxlog code ===\n";
289 functiondiff 'xfs_log_recover.c', 'cmd/xfsprogs/libxlog', 'linux/fs/xfs';