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Fix find_first_zero() functions for 32-bit bitmaps

This commit is contained in:
Eric Sandeen 2012-04-09 11:30:11 -05:00
parent 79aca9279a
commit b97ba6e052
2 changed files with 460 additions and 1 deletions
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452
e2fsprogs-1.42.2-32-bit-ffz-fix.patch Normal file
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@ -0,0 +1,452 @@
[PATCH 1/3] libext2fs: add 32-bit compat code for ext2fs_find_first_zero_generic_bmap()
The lack of 32-bit support was causing febootstrap to crash since it
wasn't passing EXT2_FLAG_64BITS when opening the file system, so we
were still using the legacy bitmaps.
Addresses-Red-Hat-Bugzilla: #808421
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
[PATCH 2/3] libext2fs: use correct types in ext2fs_find_first_zero_block_bitmap2()
Fortunately nothing was using this inline function, so we'll just fix
the types in its function signature, which were nonsensical (this was
caused by a cut-and-paste error).
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
[PATCH 3/3] libext2fs: improve testing coverage of tst_bitmaps
Improve the test coverage of tst_bitmaps by:
(a) adding the ability to test the legacy (32-bit) bitmap code
(b) adding tests for ext2fs_find_first_zero_inode_bitmap2() and
ext2fs_find_first_zero_block_bitmap2()
The recent regressions caused by the addition (and use) of
ext2fs_find_first_zero_inode_bitmap2() would have been caught if we
had added these tests first. (Another object lesson in why unit tests
are critically important!)
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
Index: e2fsprogs-1.42.2/lib/ext2fs/Makefile.in
===================================================================
--- e2fsprogs-1.42.2.orig/lib/ext2fs/Makefile.in
+++ e2fsprogs-1.42.2/lib/ext2fs/Makefile.in
@@ -403,6 +403,9 @@ check:: tst_bitops tst_badblocks tst_isc
LD_LIBRARY_PATH=$(LIB) DYLD_LIBRARY_PATH=$(LIB) \
./tst_bitmaps -t 3 -f $(srcdir)/tst_bitmaps_cmds > tst_bitmaps_out
diff $(srcdir)/tst_bitmaps_exp tst_bitmaps_out
+ LD_LIBRARY_PATH=$(LIB) DYLD_LIBRARY_PATH=$(LIB) \
+ ./tst_bitmaps -l -f $(srcdir)/tst_bitmaps_cmds > tst_bitmaps_out
+ diff $(srcdir)/tst_bitmaps_exp tst_bitmaps_out
installdirs::
$(E) " MKINSTALLDIRS $(libdir) $(includedir)/ext2fs"
Index: e2fsprogs-1.42.2/lib/ext2fs/bitops.h
===================================================================
--- e2fsprogs-1.42.2.orig/lib/ext2fs/bitops.h
+++ e2fsprogs-1.42.2/lib/ext2fs/bitops.h
@@ -153,9 +153,9 @@ extern void ext2fs_fast_unmark_inode_bit
extern int ext2fs_fast_test_inode_bitmap2(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode);
extern errcode_t ext2fs_find_first_zero_block_bitmap2(ext2fs_block_bitmap bitmap,
- ext2_ino_t start,
- ext2_ino_t end,
- ext2_ino_t *out);
+ blk64_t start,
+ blk64_t end,
+ blk64_t *out);
extern errcode_t ext2fs_find_first_zero_inode_bitmap2(ext2fs_inode_bitmap bitmap,
ext2_ino_t start,
ext2_ino_t end,
@@ -605,9 +605,9 @@ _INLINE_ int ext2fs_fast_test_inode_bitm
}
_INLINE_ errcode_t ext2fs_find_first_zero_block_bitmap2(ext2fs_block_bitmap bitmap,
- ext2_ino_t start,
- ext2_ino_t end,
- ext2_ino_t *out)
+ blk64_t start,
+ blk64_t end,
+ blk64_t *out)
{
__u64 o;
errcode_t rv;
Index: e2fsprogs-1.42.2/lib/ext2fs/ext2fs.h
===================================================================
--- e2fsprogs-1.42.2.orig/lib/ext2fs/ext2fs.h
+++ e2fsprogs-1.42.2/lib/ext2fs/ext2fs.h
@@ -1168,6 +1168,9 @@ extern errcode_t ext2fs_set_generic_bitm
errcode_t magic,
__u32 start, __u32 num,
void *in);
+extern errcode_t ext2fs_find_first_zero_generic_bitmap(ext2fs_generic_bitmap bitmap,
+ __u32 start, __u32 end,
+ __u32 *out);
/* gen_bitmap64.c */
Index: e2fsprogs-1.42.2/lib/ext2fs/gen_bitmap.c
===================================================================
--- e2fsprogs-1.42.2.orig/lib/ext2fs/gen_bitmap.c
+++ e2fsprogs-1.42.2/lib/ext2fs/gen_bitmap.c
@@ -504,6 +504,30 @@ static int ext2fs_test_clear_generic_bit
return ext2fs_mem_is_zero(ADDR + start_byte, len_byte);
}
+errcode_t ext2fs_find_first_zero_generic_bitmap(ext2fs_generic_bitmap bitmap,
+ __u32 start, __u32 end,
+ __u32 *out)
+{
+ blk_t b;
+
+ if (start < bitmap->start || end > bitmap->end || start > end) {
+ ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, start);
+ return EINVAL;
+ }
+
+ while (start <= end) {
+ b = ext2fs_test_bit(start - bitmap->start, bitmap->bitmap);
+ if (!b) {
+ *out = start;
+ return 0;
+ }
+ start++;
+ }
+
+ return ENOENT;
+}
+
+
int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num)
{
@@ -558,3 +582,4 @@ void ext2fs_unmark_block_bitmap_range(ex
ext2fs_fast_clear_bit(block + i - bitmap->start,
bitmap->bitmap);
}
+
Index: e2fsprogs-1.42.2/lib/ext2fs/gen_bitmap64.c
===================================================================
--- e2fsprogs-1.42.2.orig/lib/ext2fs/gen_bitmap64.c
+++ e2fsprogs-1.42.2/lib/ext2fs/gen_bitmap64.c
@@ -768,12 +768,36 @@ errcode_t ext2fs_find_first_zero_generic
{
int b;
- if (bitmap->bitmap_ops->find_first_zero)
- return bitmap->bitmap_ops->find_first_zero(bitmap, start, end, out);
+ if (!bitmap)
+ return EINVAL;
+
+ if (EXT2FS_IS_64_BITMAP(bitmap) && bitmap->bitmap_ops->find_first_zero)
+ return bitmap->bitmap_ops->find_first_zero(bitmap, start,
+ end, out);
+
+ if (EXT2FS_IS_32_BITMAP(bitmap)) {
+ blk_t blk = 0;
+ errcode_t retval;
+
+ if (((start) & ~0xffffffffULL) ||
+ ((end) & ~0xffffffffULL)) {
+ ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, start);
+ return EINVAL;
+ }
+
+ retval = ext2fs_find_first_zero_generic_bitmap(bitmap, start,
+ end, &blk);
+ if (retval == 0)
+ *out = blk;
+ return retval;
+ }
- if (!bitmap || !EXT2FS_IS_64_BITMAP(bitmap) || bitmap->cluster_bits)
+ if (!EXT2FS_IS_64_BITMAP(bitmap))
return EINVAL;
+ start >>= bitmap->cluster_bits;
+ end >>= bitmap->cluster_bits;
+
if (start < bitmap->start || end > bitmap->end || start > end) {
warn_bitmap(bitmap, EXT2FS_TEST_ERROR, start);
return EINVAL;
@@ -782,7 +806,7 @@ errcode_t ext2fs_find_first_zero_generic
while (start <= end) {
b = bitmap->bitmap_ops->test_bmap(bitmap, start);
if (!b) {
- *out = start;
+ *out = start << bitmap->cluster_bits;
return 0;
}
start++;
Index: e2fsprogs-1.42.2/lib/ext2fs/tst_bitmaps.c
===================================================================
--- e2fsprogs-1.42.2.orig/lib/ext2fs/tst_bitmaps.c
+++ e2fsprogs-1.42.2/lib/ext2fs/tst_bitmaps.c
@@ -151,7 +151,7 @@ int check_fs_open(char *name)
static void setup_filesystem(const char *name,
unsigned int blocks, unsigned int inodes,
- unsigned int type)
+ unsigned int type, int flags)
{
struct ext2_super_block param;
errcode_t retval;
@@ -160,7 +160,7 @@ static void setup_filesystem(const char
ext2fs_blocks_count_set(&param, blocks);
param.s_inodes_count = inodes;
- retval = ext2fs_initialize("test fs", EXT2_FLAG_64BITS, &param,
+ retval = ext2fs_initialize("test fs", flags, &param,
test_io_manager, &test_fs);
if (retval) {
@@ -198,6 +198,7 @@ void setup_cmd(int argc, char **argv)
unsigned int blocks = 128;
unsigned int inodes = 0;
unsigned int type = EXT2FS_BMAP64_BITARRAY;
+ int flags = EXT2_FLAG_64BITS;
if (test_fs) {
ext2fs_close(test_fs);
@@ -205,7 +206,7 @@ void setup_cmd(int argc, char **argv)
}
reset_getopt();
- while ((c = getopt(argc, argv, "b:i:t:")) != EOF) {
+ while ((c = getopt(argc, argv, "b:i:lt:")) != EOF) {
switch (c) {
case 'b':
blocks = parse_ulong(optarg, argv[0],
@@ -219,6 +220,9 @@ void setup_cmd(int argc, char **argv)
if (err)
return;
break;
+ case 'l': /* Legacy bitmaps */
+ flags = 0;
+ break;
case 't':
type = parse_ulong(optarg, argv[0],
"bitmap backend type", &err);
@@ -231,7 +235,7 @@ void setup_cmd(int argc, char **argv)
return;
}
}
- setup_filesystem(argv[0], blocks, inodes, type);
+ setup_filesystem(argv[0], blocks, inodes, type, flags);
}
void close_cmd(int argc, char **argv)
@@ -399,6 +403,40 @@ void do_testb(int argc, char *argv[])
printf("Block %u is %s\n", block, test_result ? "set" : "clear");
}
+void do_ffzb(int argc, char *argv[])
+{
+ unsigned int start, end;
+ int err;
+ errcode_t retval;
+ blk64_t out;
+
+ if (check_fs_open(argv[0]))
+ return;
+
+ if (argc != 3 && argc != 3) {
+ com_err(argv[0], 0, "Usage: ffzb <start> <end>");
+ return;
+ }
+
+ start = parse_ulong(argv[1], argv[0], "start", &err);
+ if (err)
+ return;
+
+ end = parse_ulong(argv[2], argv[0], "end", &err);
+ if (err)
+ return;
+
+ retval = ext2fs_find_first_zero_block_bitmap2(test_fs->block_map,
+ start, end, &out);
+ if (retval) {
+ printf("ext2fs_find_first_zero_block_bitmap2() returned %s\n",
+ error_message(retval));
+ return;
+ }
+ printf("First unmarked block is %llu\n", out);
+}
+
+
void do_zerob(int argc, char *argv[])
{
if (check_fs_open(argv[0]))
@@ -488,6 +526,40 @@ void do_testi(int argc, char *argv[])
printf("Inode %u is %s\n", inode, test_result ? "set" : "clear");
}
+void do_ffzi(int argc, char *argv[])
+{
+ unsigned int start, end;
+ int err;
+ errcode_t retval;
+ ext2_ino_t out;
+
+ if (check_fs_open(argv[0]))
+ return;
+
+ if (argc != 3 && argc != 3) {
+ com_err(argv[0], 0, "Usage: ffzi <start> <end>");
+ return;
+ }
+
+ start = parse_ulong(argv[1], argv[0], "start", &err);
+ if (err)
+ return;
+
+ end = parse_ulong(argv[2], argv[0], "end", &err);
+ if (err)
+ return;
+
+ retval = ext2fs_find_first_zero_inode_bitmap2(test_fs->inode_map,
+ start, end, &out);
+ if (retval) {
+ printf("ext2fs_find_first_zero_inode_bitmap2() returned %s\n",
+ error_message(retval));
+ return;
+ }
+ printf("First unmarked inode is %u\n", out);
+}
+
+
void do_zeroi(int argc, char *argv[])
{
if (check_fs_open(argv[0]))
@@ -506,10 +578,11 @@ int main(int argc, char **argv)
char *request = (char *)NULL;
char *cmd_file = 0;
int sci_idx;
+ int flags = EXT2_FLAG_64BITS;
add_error_table(&et_ss_error_table);
add_error_table(&et_ext2_error_table);
- while ((c = getopt (argc, argv, "b:i:t:R:f:")) != EOF) {
+ while ((c = getopt (argc, argv, "b:i:lt:R:f:")) != EOF) {
switch (c) {
case 'b':
blocks = parse_ulong(optarg, argv[0],
@@ -523,6 +596,9 @@ int main(int argc, char **argv)
if (err)
return;
break;
+ case 'l': /* Legacy bitmaps */
+ flags = 0;
+ break;
case 't':
type = parse_ulong(optarg, argv[0],
"bitmap backend type", &err);
@@ -558,7 +634,7 @@ int main(int argc, char **argv)
printf("%s %s. Type '?' for a list of commands.\n\n",
subsystem_name, version);
- setup_filesystem(argv[0], blocks, inodes, type);
+ setup_filesystem(argv[0], blocks, inodes, type, flags);
if (request) {
code = ss_execute_line(sci_idx, request);
Index: e2fsprogs-1.42.2/lib/ext2fs/tst_bitmaps_cmd.ct
===================================================================
--- e2fsprogs-1.42.2.orig/lib/ext2fs/tst_bitmaps_cmd.ct
+++ e2fsprogs-1.42.2/lib/ext2fs/tst_bitmaps_cmd.ct
@@ -21,6 +21,9 @@ request do_clearb, "Clear block",
request do_testb, "Test block",
test_block, testb;
+request do_ffzb, "Find first zero block",
+ find_first_zero_block, ffzb;
+
request do_zerob, "Clear block bitmap",
clear_block_bitmap, zerob;
@@ -33,6 +36,9 @@ request do_cleari, "Clear inode",
request do_testi, "Test inode",
test_inode, testi;
+request do_ffzi, "Find first zero inode",
+ find_first_zero_inode, ffzi;
+
request do_zeroi, "Clear inode bitmap",
clear_inode_bitmap, zeroi;
Index: e2fsprogs-1.42.2/lib/ext2fs/tst_bitmaps_cmds
===================================================================
--- e2fsprogs-1.42.2.orig/lib/ext2fs/tst_bitmaps_cmds
+++ e2fsprogs-1.42.2/lib/ext2fs/tst_bitmaps_cmds
@@ -16,6 +16,12 @@ testb 11
testb 15
testb 16
dump_bb
+ffzb 11 16
+ffzb 12 16
+ffzb 12 20
+clearb 13
+ffzb 12 20
+setb 13
clearb 12 7
testb 12 7
setb 15
@@ -33,6 +39,11 @@ seti 5
testi 6
testi 1
dump_ib
+ffzi 1 6
+ffzi 2 5
+ffzi 2 6
+cleari 4
+ffzi 2 6
zeroi
testi 5
seti 5
Index: e2fsprogs-1.42.2/lib/ext2fs/tst_bitmaps_exp
===================================================================
--- e2fsprogs-1.42.2.orig/lib/ext2fs/tst_bitmaps_exp
+++ e2fsprogs-1.42.2/lib/ext2fs/tst_bitmaps_exp
@@ -36,6 +36,18 @@ tst_bitmaps: testb 16
Block 16 is set
tst_bitmaps: dump_bb
block bitmap: 00f80000000000000000000000000000
+tst_bitmaps: ffzb 11 16
+First unmarked block is 11
+tst_bitmaps: ffzb 12 16
+ext2fs_find_first_zero_block_bitmap2() returned No such file or directory
+tst_bitmaps: ffzb 12 20
+First unmarked block is 17
+tst_bitmaps: clearb 13
+Clearing block 13, was set before
+tst_bitmaps: ffzb 12 20
+First unmarked block is 13
+tst_bitmaps: setb 13
+Setting block 13, was clear before
tst_bitmaps: clearb 12 7
Clearing blocks 12 to 18
tst_bitmaps: testb 12 7
@@ -70,6 +82,16 @@ tst_bitmaps: testi 1
Inode 1 is clear
tst_bitmaps: dump_ib
inode bitmap: 1e000000
+tst_bitmaps: ffzi 1 6
+First unmarked inode is 1
+tst_bitmaps: ffzi 2 5
+ext2fs_find_first_zero_inode_bitmap2() returned No such file or directory
+tst_bitmaps: ffzi 2 6
+First unmarked inode is 6
+tst_bitmaps: cleari 4
+Clearing inode 4, was set before
+tst_bitmaps: ffzi 2 6
+First unmarked inode is 4
tst_bitmaps: zeroi
Clearing inode bitmap.
tst_bitmaps: testi 5

9
e2fsprogs.spec
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@ -1,7 +1,7 @@
Summary: Utilities for managing ext2, ext3, and ext4 filesystems
Name: e2fsprogs
Version: 1.42.2
Release: 3%{?dist}
Release: 4%{?dist}
# License tags based on COPYING file distinctions for various components
License: GPLv2
@ -10,6 +10,7 @@ Source0: http://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.gz
Source1: ext2_types-wrapper.h
Patch1: e2fsprogs-1.40.4-sb_feature_check_ignore.patch
Patch2: e2fsprogs-1.42.2-32-bit-ffz-fix.patch
Url: http://e2fsprogs.sourceforge.net/
BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@ -146,6 +147,9 @@ It was originally inspired by the Multics SubSystem library.
# after an selinux install...
%patch1 -p1 -b .featurecheck
# Handle 32-bit bitmaps in new find_first_zero functions (upstream patch)
%patch2 -p1
%build
%configure --enable-elf-shlibs --enable-nls --disable-uuidd --disable-fsck \
--disable-e2initrd-helper --disable-libblkid --disable-libuuid \
@ -315,6 +319,9 @@ exit 0
%{_libdir}/pkgconfig/ss.pc
%changelog
* Mon Apr 09 2012 Eric Sandeen <sandeen@@redhat.com> 1.42.2-4
- Handle 32-bit bitmaps in new find_first_zero functions
* Fri Mar 30 2012 Richard W.M. Jones <rjones@redhat.com> 1.42.2-3
- Rebuild against new RPM (RHBZ#808250).