[PATCH] jbd2: sector_t conversion

JBD layer in-kernel block varibles type fixes to support >32 bit block number
and convert to sector_t type.

Signed-off-by: Mingming Cao <cmm@us.ibm.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>

4 files changed, 26 insertions, 25 deletions

diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 44d68a113c73..1a9ce8885220 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -293,7 +293,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
         int bufs;
         int flags;
         int err;
-        unsigned long blocknr;
+        sector_t blocknr;
         char *tagp = NULL;
         journal_header_t *header;
         journal_block_tag_t *tag = NULL;
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 926ebcbf8a7a..259e8365ea15 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -271,7 +271,7 @@ static void journal_kill_thread(journal_t *journal)
 int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
                                   struct journal_head  *jh_in,
                                   struct journal_head **jh_out,
-                                  unsigned long blocknr)
+                                  sector_t blocknr)
 {
         int need_copy_out = 0;
         int done_copy_out = 0;
@@ -555,7 +555,7 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid)
  * Log buffer allocation routines:
  */
 
-int jbd2_journal_next_log_block(journal_t *journal, unsigned long *retp)
+int jbd2_journal_next_log_block(journal_t *journal, sector_t *retp)
 {
         unsigned long blocknr;
 
@@ -579,10 +579,10 @@ int jbd2_journal_next_log_block(journal_t *journal, unsigned long *retp)
  * ready.
  */
 int jbd2_journal_bmap(journal_t *journal, unsigned long blocknr,
-                 unsigned long *retp)
+                 sector_t *retp)
 {
         int err = 0;
-        unsigned long ret;
+        sector_t ret;
 
         if (journal->j_inode) {
                 ret = bmap(journal->j_inode, blocknr);
@@ -618,7 +618,7 @@ int jbd2_journal_bmap(journal_t *journal, unsigned long blocknr,
 struct journal_head *jbd2_journal_get_descriptor_buffer(journal_t *journal)
 {
         struct buffer_head *bh;
-        unsigned long blocknr;
+        sector_t blocknr;
         int err;
 
         err = jbd2_journal_next_log_block(journal, &blocknr);
@@ -706,7 +706,7 @@ fail:
  */
 journal_t * jbd2_journal_init_dev(struct block_device *bdev,
                         struct block_device *fs_dev,
-                        int start, int len, int blocksize)
+                        sector_t start, int len, int blocksize)
 {
         journal_t *journal = journal_init_common();
         struct buffer_head *bh;
@@ -753,7 +753,7 @@ journal_t * jbd2_journal_init_inode (struct inode *inode)
         journal_t *journal = journal_init_common();
         int err;
         int n;
-        unsigned long blocknr;
+        sector_t blocknr;
 
         if (!journal)
                 return NULL;
@@ -819,7 +819,7 @@ static void journal_fail_superblock (journal_t *journal)
 static int journal_reset(journal_t *journal)
 {
         journal_superblock_t *sb = journal->j_superblock;
-        unsigned long first, last;
+        sector_t first, last;
 
         first = be32_to_cpu(sb->s_first);
         last = be32_to_cpu(sb->s_maxlen);
@@ -853,7 +853,7 @@ static int journal_reset(journal_t *journal)
  **/
 int jbd2_journal_create(journal_t *journal)
 {
-        unsigned long blocknr;
+        sector_t blocknr;
         struct buffer_head *bh;
         journal_superblock_t *sb;
         int i, err;
diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
index 2486843adda0..52054a83e717 100644
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -70,7 +70,7 @@ static int do_readahead(journal_t *journal, unsigned int start)
 {
         int err;
         unsigned int max, nbufs, next;
-        unsigned long blocknr;
+        sector_t blocknr;
         struct buffer_head *bh;
 
         struct buffer_head * bufs[MAXBUF];
@@ -132,7 +132,7 @@ static int jread(struct buffer_head **bhp, journal_t *journal,
                  unsigned int offset)
 {
         int err;
-        unsigned long blocknr;
+        sector_t blocknr;
         struct buffer_head *bh;
 
         *bhp = NULL;
@@ -452,7 +452,7 @@ static int do_one_pass(journal_t *journal,
                                                 "block %ld in log\n",
                                                 err, io_block);
                                 } else {
-                                        unsigned long blocknr;
+                                        sector_t blocknr;
 
                                         J_ASSERT(obh != NULL);
                                         blocknr = read_tag_block(tag_bytes,
@@ -592,7 +592,7 @@ static int scan_revoke_records(journal_t *journal, struct buffer_head *bh,
                 record_len = 8;
 
         while (offset + record_len <= max) {
-                unsigned long blocknr;
+                sector_t blocknr;
                 int err;
 
                 if (record_len == 4)
diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
index 8aac875bd301..3310a1d7ace9 100644
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -81,7 +81,7 @@ struct jbd2_revoke_record_s
 {
         struct list_head  hash;
         tid_t             sequence;     /* Used for recovery only */
-        unsigned long     blocknr;
+        sector_t          blocknr;
 };
 
 
@@ -106,17 +106,18 @@ static void flush_descriptor(journal_t *, struct journal_head *, int);
 /* Utility functions to maintain the revoke table */
 
 /* Borrowed from buffer.c: this is a tried and tested block hash function */
-static inline int hash(journal_t *journal, unsigned long block)
+static inline int hash(journal_t *journal, sector_t block)
 {
         struct jbd2_revoke_table_s *table = journal->j_revoke;
         int hash_shift = table->hash_shift;
+        int hash = (int)block ^ (int)((block >> 31) >> 1);
 
-        return ((block << (hash_shift - 6)) ^
-                (block >> 13) ^
-                (block << (hash_shift - 12))) & (table->hash_size - 1);
+        return ((hash << (hash_shift - 6)) ^
+                (hash >> 13) ^
+                (hash << (hash_shift - 12))) & (table->hash_size - 1);
 }
 
-static int insert_revoke_hash(journal_t *journal, unsigned long blocknr,
+static int insert_revoke_hash(journal_t *journal, sector_t blocknr,
                               tid_t seq)
 {
         struct list_head *hash_list;
@@ -146,7 +147,7 @@ oom:
 /* Find a revoke record in the journal's hash table. */
 
 static struct jbd2_revoke_record_s *find_revoke_record(journal_t *journal,
-                                                      unsigned long blocknr)
+                                                      sector_t blocknr)
 {
         struct list_head *hash_list;
         struct jbd2_revoke_record_s *record;
@@ -325,7 +326,7 @@ void jbd2_journal_destroy_revoke(journal_t *journal)
  * by one.
  */
 
-int jbd2_journal_revoke(handle_t *handle, unsigned long blocknr,
+int jbd2_journal_revoke(handle_t *handle, sector_t blocknr,
                    struct buffer_head *bh_in)
 {
         struct buffer_head *bh = NULL;
@@ -394,7 +395,7 @@ int jbd2_journal_revoke(handle_t *handle, unsigned long blocknr,
                 }
         }
 
-        jbd_debug(2, "insert revoke for block %lu, bh_in=%p\n", blocknr, bh_in);
+        jbd_debug(2, "insert revoke for block %llu, bh_in=%p\n",blocknr, bh_in);
         err = insert_revoke_hash(journal, blocknr,
                                 handle->h_transaction->t_tid);
         BUFFER_TRACE(bh_in, "exit");
@@ -649,7 +650,7 @@ static void flush_descriptor(journal_t *journal,
  */
 
 int jbd2_journal_set_revoke(journal_t *journal,
-                       unsigned long blocknr,
+                       sector_t blocknr,
                        tid_t sequence)
 {
         struct jbd2_revoke_record_s *record;
@@ -673,7 +674,7 @@ int jbd2_journal_set_revoke(journal_t *journal,
  */
 
 int jbd2_journal_test_revoke(journal_t *journal,
-                        unsigned long blocknr,
+                        sector_t blocknr,
                         tid_t sequence)
 {
         struct jbd2_revoke_record_s *record;