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authorZach Brown <zach.brown@oracle.com>2006-10-11 12:21:08 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-11 22:14:16 +0400
commitb517bea1c74e4773482b3f41b3f493522a8c8e30 (patch)
tree1e98110151f1a35cde84ce1a2cb6f0cb871e9551 /fs/jbd2/recovery.c
parentd0d856e8bd6e697cb44b2b4dd038f3bec576a70e (diff)
downloadlinux-b517bea1c74e4773482b3f41b3f493522a8c8e30.tar.xz
[PATCH] 64-bit jbd2 core
Here is the patch to JBD to handle 64 bit block numbers, originally from Zach Brown. This patch is useful only after adding support for 64-bit block numbers in the filesystem. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Zach Brown <zach.brown@oracle.com> Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/jbd2/recovery.c')
-rw-r--r--fs/jbd2/recovery.c43
1 files changed, 30 insertions, 13 deletions
diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
index b2012d112432..2486843adda0 100644
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -178,19 +178,20 @@ static int jread(struct buffer_head **bhp, journal_t *journal,
* Count the number of in-use tags in a journal descriptor block.
*/
-static int count_tags(struct buffer_head *bh, int size)
+static int count_tags(journal_t *journal, struct buffer_head *bh)
{
char * tagp;
journal_block_tag_t * tag;
- int nr = 0;
+ int nr = 0, size = journal->j_blocksize;
+ int tag_bytes = journal_tag_bytes(journal);
tagp = &bh->b_data[sizeof(journal_header_t)];
- while ((tagp - bh->b_data + sizeof(journal_block_tag_t)) <= size) {
+ while ((tagp - bh->b_data + tag_bytes) <= size) {
tag = (journal_block_tag_t *) tagp;
nr++;
- tagp += sizeof(journal_block_tag_t);
+ tagp += tag_bytes;
if (!(tag->t_flags & cpu_to_be32(JBD2_FLAG_SAME_UUID)))
tagp += 16;
@@ -307,6 +308,14 @@ int jbd2_journal_skip_recovery(journal_t *journal)
return err;
}
+static inline sector_t read_tag_block(int tag_bytes, journal_block_tag_t *tag)
+{
+ sector_t block = be32_to_cpu(tag->t_blocknr);
+ if (tag_bytes > JBD_TAG_SIZE32)
+ block |= (u64)be32_to_cpu(tag->t_blocknr_high) << 32;
+ return block;
+}
+
static int do_one_pass(journal_t *journal,
struct recovery_info *info, enum passtype pass)
{
@@ -318,11 +327,12 @@ static int do_one_pass(journal_t *journal,
struct buffer_head * bh;
unsigned int sequence;
int blocktype;
+ int tag_bytes = journal_tag_bytes(journal);
/* Precompute the maximum metadata descriptors in a descriptor block */
int MAX_BLOCKS_PER_DESC;
MAX_BLOCKS_PER_DESC = ((journal->j_blocksize-sizeof(journal_header_t))
- / sizeof(journal_block_tag_t));
+ / tag_bytes);
/*
* First thing is to establish what we expect to find in the log
@@ -412,8 +422,7 @@ static int do_one_pass(journal_t *journal,
* in pass REPLAY; otherwise, just skip over the
* blocks it describes. */
if (pass != PASS_REPLAY) {
- next_log_block +=
- count_tags(bh, journal->j_blocksize);
+ next_log_block += count_tags(journal, bh);
wrap(journal, next_log_block);
brelse(bh);
continue;
@@ -424,7 +433,7 @@ static int do_one_pass(journal_t *journal,
* getting done here! */
tagp = &bh->b_data[sizeof(journal_header_t)];
- while ((tagp - bh->b_data +sizeof(journal_block_tag_t))
+ while ((tagp - bh->b_data + tag_bytes)
<= journal->j_blocksize) {
unsigned long io_block;
@@ -446,7 +455,8 @@ static int do_one_pass(journal_t *journal,
unsigned long blocknr;
J_ASSERT(obh != NULL);
- blocknr = be32_to_cpu(tag->t_blocknr);
+ blocknr = read_tag_block(tag_bytes,
+ tag);
/* If the block has been
* revoked, then we're all done
@@ -494,7 +504,7 @@ static int do_one_pass(journal_t *journal,
}
skip_write:
- tagp += sizeof(journal_block_tag_t);
+ tagp += tag_bytes;
if (!(flags & JBD2_FLAG_SAME_UUID))
tagp += 16;
@@ -572,17 +582,24 @@ static int scan_revoke_records(journal_t *journal, struct buffer_head *bh,
{
jbd2_journal_revoke_header_t *header;
int offset, max;
+ int record_len = 4;
header = (jbd2_journal_revoke_header_t *) bh->b_data;
offset = sizeof(jbd2_journal_revoke_header_t);
max = be32_to_cpu(header->r_count);
- while (offset < max) {
+ if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_64BIT))
+ record_len = 8;
+
+ while (offset + record_len <= max) {
unsigned long blocknr;
int err;
- blocknr = be32_to_cpu(* ((__be32 *) (bh->b_data+offset)));
- offset += 4;
+ if (record_len == 4)
+ blocknr = be32_to_cpu(* ((__be32 *) (bh->b_data+offset)));
+ else
+ blocknr = be64_to_cpu(* ((__be64 *) (bh->b_data+offset)));
+ offset += record_len;
err = jbd2_journal_set_revoke(journal, blocknr, sequence);
if (err)
return err;