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Subject[PATCH] 2.5 [4 of 8] 04-hash_autodetect_fix.diff
Hello!

Correctly detect and print hash values, when manual hash detection is used.


--- linux/include/linux/reiserfs_fs.h.orig Mon Feb 11 09:28:48 2002
+++ linux/include/linux/reiserfs_fs.h Mon Feb 11 10:02:41 2002
@@ -1960,6 +1960,7 @@
void check_leaf (struct buffer_head * bh);
void check_internal (struct buffer_head * bh);
void print_statistics (struct super_block * s);
+char * reiserfs_hashname(int code);

/* lbalance.c */
int leaf_move_items (int shift_mode, struct tree_balance * tb, int mov_num, int mov_bytes, struct buffer_head * Snew);
--- linux/fs/reiserfs/super.c.orig Mon Feb 11 09:58:31 2002
+++ linux/fs/reiserfs/super.c Mon Feb 11 10:08:08 2002
@@ -850,7 +850,9 @@

inode = s->s_root->d_inode;

- while (1) {
+ do { // Some serious "goto"-hater was there ;)
+ u32 teahash, r5hash, yurahash;
+
make_cpu_key (&key, inode, ~0, TYPE_DIRENTRY, 3);
retval = search_by_entry_key (s, &key, &path, &de);
if (retval == IO_ERROR) {
@@ -869,20 +871,30 @@
"is using the default hash\n");
break;
}
- if (GET_HASH_VALUE(yura_hash (de.de_name, de.de_namelen)) ==
- GET_HASH_VALUE(keyed_hash (de.de_name, de.de_namelen))) {
- reiserfs_warning ("reiserfs: Could not detect hash function "
- "please mount with -o hash={tea,rupasov,r5}\n") ;
- hash = UNSET_HASH ;
+ r5hash=GET_HASH_VALUE (r5_hash (de.de_name, de.de_namelen));
+ teahash=GET_HASH_VALUE (keyed_hash (de.de_name, de.de_namelen));
+ yurahash=GET_HASH_VALUE (yura_hash (de.de_name, de.de_namelen));
+ if ( ( (teahash == r5hash) && (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) ) ||
+ ( (teahash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ||
+ ( (r5hash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ) {
+ reiserfs_warning("reiserfs: Unable to automatically detect hash"
+ "function for device %s\n"
+ "please mount with -o hash={tea,rupasov,r5}\n", kdevname (s->s_dev));
+ hash = UNSET_HASH;
break;
}
- if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) ==
- GET_HASH_VALUE (yura_hash (de.de_name, de.de_namelen)))
+ if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == yurahash)
hash = YURA_HASH;
- else
+ else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == teahash)
hash = TEA_HASH;
- break;
- }
+ else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == r5hash)
+ hash = R5_HASH;
+ else {
+ reiserfs_warning("reiserfs: Unrecognised hash function for "
+ "device %s\n", kdevname (s->s_dev));
+ hash = UNSET_HASH;
+ }
+ } while (0);

pathrelse (&path);
return hash;
@@ -907,16 +919,16 @@
** mount options
*/
if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
- printk("REISERFS: Error, tea hash detected, "
- "unable to force rupasov hash\n") ;
+ printk("REISERFS: Error, %s hash detected, "
+ "unable to force rupasov hash\n", reiserfs_hashname(code)) ;
code = UNSET_HASH ;
} else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
- printk("REISERFS: Error, rupasov hash detected, "
- "unable to force tea hash\n") ;
+ printk("REISERFS: Error, %s hash detected, "
+ "unable to force tea hash\n", reiserfs_hashname(code)) ;
code = UNSET_HASH ;
} else if (reiserfs_r5_hash(s) && code != R5_HASH) {
- printk("REISERFS: Error, r5 hash detected, "
- "unable to force r5 hash\n") ;
+ printk("REISERFS: Error, %s hash detected, "
+ "unable to force r5 hash\n", reiserfs_hashname(code)) ;
code = UNSET_HASH ;
}
} else {
--- linux/fs/reiserfs/prints.c.orig Mon Feb 11 09:28:48 2002
+++ linux/fs/reiserfs/prints.c Mon Feb 11 10:09:33 2002
@@ -477,6 +477,17 @@
return 0;
}

+char * reiserfs_hashname(int code)
+{
+ if ( code == YURA_HASH)
+ return "rupasov";
+ if ( code == TEA_HASH)
+ return "tea";
+ if ( code == R5_HASH)
+ return "r5";
+
+ return "unknown";
+}
/* return 1 if this is not super block */
static int print_super_block (struct buffer_head * bh)
{
@@ -519,8 +530,7 @@
printk ("Journal orig size %d\n", sb_jp_journal_size(rs));
printk ("FS state %d\n", sb_fs_state(rs));
printk ("Hash function \"%s\"\n",
- sb_hash_function_code(rs) == TEA_HASH ? "tea" :
- ( sb_hash_function_code(rs) == YURA_HASH ? "rupasov" : (sb_hash_function_code(rs) == R5_HASH ? "r5" : "unknown")));
+ reiserfs_hashname(sb_hash_function_code(rs)));

printk ("Tree height %d\n", sb_tree_height(rs));
return 0;
-
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