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Message-Id: <20230919085552.25262-2-adilger@dilger.ca>
Date: Tue, 19 Sep 2023 02:55:47 -0600
From: Andreas Dilger <adilger@...ger.ca>
To: tytso@....edu
Cc: linux-ext4@...r.kernel.org,
Alexey Lyashkov <alexey.lyashkov@...il.com>,
Andreas Dilger <adilger@...ger.ca>
Subject: [PATCH 2/7] [v2] lib: move journal checksum code to libsupport
From: Alexey Lyashkov <alexey.lyashkov@...il.com>
e2fsck and debugfs have their own copy journal checksum
functions, kill duplicates and move into support library.
Signed-off-by: Alexey Lyashkov <alexey.lyashkov@...il.com>
Reviewed-by: Andreas Dilger <adilger@...ger.ca>
---
debugfs/journal.c | 50 ----------------------------------
e2fsck/journal.c | 60 ++++-------------------------------------
lib/support/Android.bp | 1 +
lib/support/Makefile.in | 4 +++
lib/support/jbd2_user.h | 6 +++++
5 files changed, 16 insertions(+), 105 deletions(-)
diff --git a/debugfs/journal.c b/debugfs/journal.c
index 5bac0d3b..bf199699 100644
--- a/debugfs/journal.c
+++ b/debugfs/journal.c
@@ -43,56 +43,6 @@ static int bh_count = 0;
*/
#undef USE_INODE_IO
-/* Checksumming functions */
-static int ext2fs_journal_verify_csum_type(journal_t *j,
- journal_superblock_t *jsb)
-{
- if (!jbd2_journal_has_csum_v2or3(j))
- return 1;
-
- return jsb->s_checksum_type == JBD2_CRC32C_CHKSUM;
-}
-
-static __u32 ext2fs_journal_sb_csum(journal_superblock_t *jsb)
-{
- __u32 crc, old_crc;
-
- old_crc = jsb->s_checksum;
- jsb->s_checksum = 0;
- crc = ext2fs_crc32c_le(~0, (unsigned char *)jsb,
- sizeof(journal_superblock_t));
- jsb->s_checksum = old_crc;
-
- return crc;
-}
-
-static int ext2fs_journal_sb_csum_verify(journal_t *j,
- journal_superblock_t *jsb)
-{
- __u32 provided, calculated;
-
- if (!jbd2_journal_has_csum_v2or3(j))
- return 1;
-
- provided = ext2fs_be32_to_cpu(jsb->s_checksum);
- calculated = ext2fs_journal_sb_csum(jsb);
-
- return provided == calculated;
-}
-
-static errcode_t ext2fs_journal_sb_csum_set(journal_t *j,
- journal_superblock_t *jsb)
-{
- __u32 crc;
-
- if (!jbd2_journal_has_csum_v2or3(j))
- return 0;
-
- crc = ext2fs_journal_sb_csum(jsb);
- jsb->s_checksum = ext2fs_cpu_to_be32(crc);
- return 0;
-}
-
/* Kernel compatibility functions for handling the journal. These allow us
* to use the recovery.c file virtually unchanged from the kernel, so we
* don't have to do much to keep kernel and user recovery in sync.
diff --git a/e2fsck/journal.c b/e2fsck/journal.c
index 26927cde..bc3c699a 100644
--- a/e2fsck/journal.c
+++ b/e2fsck/journal.c
@@ -38,56 +38,6 @@ static int bh_count = 0;
*/
#undef USE_INODE_IO
-/* Checksumming functions */
-static int e2fsck_journal_verify_csum_type(journal_t *j,
- journal_superblock_t *jsb)
-{
- if (!jbd2_journal_has_csum_v2or3(j))
- return 1;
-
- return jsb->s_checksum_type == JBD2_CRC32C_CHKSUM;
-}
-
-static __u32 e2fsck_journal_sb_csum(journal_superblock_t *jsb)
-{
- __u32 crc, old_crc;
-
- old_crc = jsb->s_checksum;
- jsb->s_checksum = 0;
- crc = ext2fs_crc32c_le(~0, (unsigned char *)jsb,
- sizeof(journal_superblock_t));
- jsb->s_checksum = old_crc;
-
- return crc;
-}
-
-static int e2fsck_journal_sb_csum_verify(journal_t *j,
- journal_superblock_t *jsb)
-{
- __u32 provided, calculated;
-
- if (!jbd2_journal_has_csum_v2or3(j))
- return 1;
-
- provided = ext2fs_be32_to_cpu(jsb->s_checksum);
- calculated = e2fsck_journal_sb_csum(jsb);
-
- return provided == calculated;
-}
-
-static errcode_t e2fsck_journal_sb_csum_set(journal_t *j,
- journal_superblock_t *jsb)
-{
- __u32 crc;
-
- if (!jbd2_journal_has_csum_v2or3(j))
- return 0;
-
- crc = e2fsck_journal_sb_csum(jsb);
- jsb->s_checksum = ext2fs_cpu_to_be32(crc);
- return 0;
-}
-
/* Kernel compatibility functions for handling the journal. These allow us
* to use the recovery.c file virtually unchanged from the kernel, so we
* don't have to do much to keep kernel and user recovery in sync.
@@ -1347,8 +1297,8 @@ static errcode_t e2fsck_journal_load(journal_t *journal)
jbd2_has_feature_checksum(journal))
return EXT2_ET_CORRUPT_JOURNAL_SB;
- if (!e2fsck_journal_verify_csum_type(journal, jsb) ||
- !e2fsck_journal_sb_csum_verify(journal, jsb))
+ if (!ext2fs_journal_verify_csum_type(journal, jsb) ||
+ !ext2fs_journal_sb_csum_verify(journal, jsb))
return EXT2_ET_CORRUPT_JOURNAL_SB;
if (jbd2_journal_has_csum_v2or3(journal))
@@ -1436,7 +1386,7 @@ static void e2fsck_journal_reset_super(e2fsck_t ctx, journal_superblock_t *jsb,
for (i = 0; i < 4; i ++)
new_seq ^= u.val[i];
jsb->s_sequence = htonl(new_seq);
- e2fsck_journal_sb_csum_set(journal, jsb);
+ ext2fs_journal_sb_csum_set(journal, jsb);
mark_buffer_dirty(journal->j_sb_buffer);
ll_rw_block(REQ_OP_WRITE, 0, 1, &journal->j_sb_buffer);
@@ -1476,7 +1426,7 @@ static void e2fsck_journal_release(e2fsck_t ctx, journal_t *journal,
jsb->s_sequence = htonl(journal->j_tail_sequence);
if (reset)
jsb->s_start = 0; /* this marks the journal as empty */
- e2fsck_journal_sb_csum_set(journal, jsb);
+ ext2fs_journal_sb_csum_set(journal, jsb);
mark_buffer_dirty(journal->j_sb_buffer);
}
brelse(journal->j_sb_buffer);
@@ -1619,7 +1569,7 @@ no_has_journal:
ctx->fs->super->s_state |= EXT2_ERROR_FS;
ext2fs_mark_super_dirty(ctx->fs);
journal->j_superblock->s_errno = 0;
- e2fsck_journal_sb_csum_set(journal, journal->j_superblock);
+ ext2fs_journal_sb_csum_set(journal, journal->j_superblock);
mark_buffer_dirty(journal->j_sb_buffer);
}
diff --git a/lib/support/Android.bp b/lib/support/Android.bp
index af9b28df..260f4b31 100644
--- a/lib/support/Android.bp
+++ b/lib/support/Android.bp
@@ -30,6 +30,7 @@ cc_library {
"quotaio.c",
"quotaio_tree.c",
"quotaio_v2.c",
+ "jbd2_user.c"
],
shared_libs: [
"libext2fs",
diff --git a/lib/support/Makefile.in b/lib/support/Makefile.in
index b6229091..284fde85 100644
--- a/lib/support/Makefile.in
+++ b/lib/support/Makefile.in
@@ -14,6 +14,7 @@ MKDIR_P = @MKDIR_P@
all::
OBJS= cstring.o \
+ jbd2_user.o \
mkquota.o \
plausible.o \
profile.o \
@@ -29,6 +30,7 @@ OBJS= cstring.o \
SRCS= $(srcdir)/argv_parse.c \
$(srcdir)/cstring.c \
+ $(srcdir)/jbd2_user.c \
$(srcdir)/mkquota.c \
$(srcdir)/parse_qtype.c \
$(srcdir)/plausible.c \
@@ -110,6 +112,8 @@ argv_parse.o: $(srcdir)/argv_parse.c $(top_builddir)/lib/config.h \
$(top_builddir)/lib/dirpaths.h $(srcdir)/argv_parse.h
cstring.o: $(srcdir)/cstring.c $(top_builddir)/lib/config.h \
$(top_builddir)/lib/dirpaths.h $(srcdir)/cstring.h
+jbd2_user.o: $(srcdir)/jbd2_user.c $(top_builddir)/lib/config.h \
+ $(srcdir)/jbd2_user.h
mkquota.o: $(srcdir)/mkquota.c $(top_builddir)/lib/config.h \
$(top_builddir)/lib/dirpaths.h $(top_srcdir)/lib/ext2fs/ext2_fs.h \
$(top_builddir)/lib/ext2fs/ext2_types.h $(top_srcdir)/lib/ext2fs/ext2fs.h \
diff --git a/lib/support/jbd2_user.h b/lib/support/jbd2_user.h
index 5928a8a8..22f8cb7e 100644
--- a/lib/support/jbd2_user.h
+++ b/lib/support/jbd2_user.h
@@ -251,6 +251,12 @@ _INLINE_ void jbd2_descriptor_block_csum_set(journal_t *j,
#undef _INLINE_
#endif
+/* Checksumming functions */
+int ext2fs_journal_verify_csum_type(journal_t *j, journal_superblock_t *jsb);
+__u32 ext2fs_journal_sb_csum(journal_superblock_t *jsb);
+int ext2fs_journal_sb_csum_verify(journal_t *j, journal_superblock_t *jsb);
+errcode_t ext2fs_journal_sb_csum_set(journal_t *j, journal_superblock_t *jsb);
+
/*
* Kernel compatibility functions are defined in journal.c
*/
--
2.25.1
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