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( 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_dqblk.h xfs_dquot_item.h
55 xfs_extfree_item.h xfs_ialloc.h xfs_imap.h
56 xfs_ialloc_btree.h xfs_inode.h xfs_inode_item.h
57 xfs_inum.h xfs_log.h xfs_log_priv.h xfs_log_recover.h
58 xfs_mount.h xfs_quota.h xfs_rtalloc.h
59 xfs_sb.h xfs_trans.h xfs_trans_space.h xfs_types.h
60 xfs_fs.h xfs_acl.h xfs_cap.h xfs_mac.h
64 my ( $file, $prefix1, $prefix2 ) = @_;
66 `diff $prefix1/$file $prefix2/$file >/dev/null 2>&1`;
68 print sprintf("\t%-35s ... ", $file);
69 if ($? != 0) { print "FAILED\n"; }
70 else { print "ok\n"; }
72 printf("\t%-35s ... ", $file);
77 my $first = shift @pkglist;
79 print "\n=== Checking $_ package ===\n";
80 straightdiff 'buildrules', "cmd/$first/include", "cmd/$_/include";
81 straightdiff 'buildmacros', "cmd/$first/include", "cmd/$_/include";
83 print "\n=== Checking headers ===\n";
85 straightdiff $_, 'cmd/xfsprogs/include', 'linux/fs/xfs';
87 straightdiff 'dmapi_kern.h', 'cmd/dmapi/include', 'linux/fs/xfs/dmapi';
88 straightdiff 'dmapi.h', 'cmd/dmapi/include', 'linux/fs/xfs/dmapi';
92 # Implements a tri-state FSA, see comments for state transitions
93 # (knows about the way the XFS kernel code is written, & makes
94 # some assumptions so as to not need to parse generic C code).
95 # Accepts one line at a time from a source file, picking out the
96 # function bodies so they can be subsequently compared.
99 my $line; # line number in current source file
100 my $state; # current FSA state
101 my $funcbody; # current function body (contents)
104 my ( $newline ) = @_;
108 # if line looks like start of a function, transition to 1
109 # & squirrel line away as line 1 of current function
111 if ($newline =~ m/^[xfs|xlog]/) {
113 $funcbody = $newline;
118 # if line looks like start of a function, stay here
119 # & squirrel line away as line 1 of current function
120 # otherwise if line isn't start of function body,
121 # squirrel line away as next line of current function
122 # (args/..., but not sure this is a real function yet)
123 # otherwise (start of function)
124 # squirrel line away as next line of current function
125 # transition to state 2
126 elsif ($state == 1) {
127 if ($newline =~ m/^[xfs|xlog]/) {
128 $funcbody = $newline;
130 elsif ($newline =~ m/^\{/) {
132 $funcbody .= $newline;
137 # if line looks like end of function body,
138 # squirrel line away as last line of current function
139 # tell someone we have a complete function ready
140 # transition to state 0
142 # squirrel line away as next line of current function
143 elsif ($state == 2) {
144 $funcbody .= $newline;
145 if ($newline =~ m/^\}/) {
152 die "unknown state transition";
154 return undef; # i.e. not at end of a function
164 open(USER, "$file") || die "cannot open $file";
166 my $func = setstate($_);
167 push @funcs, $func if (defined($func)); # store function away
180 open(KERN, "$file") || die "cannot open $file";
182 my $func = setstate($_);
183 if (defined($func)) {
184 $func =~ m/^([xfs|xlog]\w+)\s*\(/;
185 next unless defined($1);
187 if (defined($func)) {
188 $funcs{$name} = $func; # store function away
197 my ( $sa, $sb ) = @_;
199 return unless defined($xdiff);
201 open(FILEA, "> /tmp/diff.user.$$") || die "cannot write to /tmp/diff.user.$$";
202 open(FILEB, "> /tmp/diff.kern.$$") || die "cannot write to /tmp/diff.kern.$$";
207 `$xdiff /tmp/diff.user.$$ /tmp/diff.kern.$$`;
208 unlink ("/tmp/diff.user.$$","/tmp/diff.kern.$$");
212 my ( $file, $prefix1, $prefix2 ) = @_;
218 print "\n=== Checking $file routines ===\n" unless ($quiet);
220 # iterate over user funcs, match up to kernel funcs
222 my @user = listfuncs "$prefix1/$file";
223 my %kern = hashfuncs "$prefix2/$file";
225 foreach my $userfunc (@user) {
227 $userfunc =~ m/^([xfs|xlog]\w+)\s*\(/;
228 next unless (defined($1));
232 if (exists($kern{$name})) {
233 if ($userfunc ne $kern{$name}) {
234 print "\n=== $file routines ===\n"
235 if (!$found++ && $quiet);
237 printf("\t%-35s ... ", $name);
239 diffme $userfunc, $kern{$name};
242 printf("\t%-35s ... ", $name);
247 print "Cannot find kernel function $userfunc";
248 print " in file $prefix2/$file\n";
251 ($count != 1) && ( $plural = 's' );
252 print "( Total: $count routine$plural checked in $file )\n" unless ($quiet);
255 # cmd/xfsprogs/{libxfs,libxlog}/* fs/xfs/*
257 xfs_alloc.c xfs_alloc_btree.c xfs_attr_leaf.c
258 xfs_bmap.c xfs_bmap_btree.c xfs_btree.c xfs_da_btree.c
259 xfs_dir.c xfs_dir2.c xfs_dir2_block.c xfs_dir2_data.c
260 xfs_dir2_leaf.c xfs_dir2_node.c xfs_dir2_sf.c
261 xfs_dir_leaf.c xfs_ialloc.c xfs_ialloc_btree.c
262 xfs_inode.c xfs_rtalloc.c xfs_mount.c xfs_trans.c
265 print "\n=== Checking libxfs code ===\n";
266 foreach (@funclist) {
267 functiondiff $_, 'cmd/xfsprogs/libxfs', 'linux/fs/xfs';
269 print "\n=== Checking libxlog code ===\n";
270 functiondiff 'xfs_log_recover.c', 'cmd/xfsprogs/libxlog', 'linux/fs/xfs';