The hash detection code uses long ugly macros multiple times to get the same
value. This patch cleans it up to be easier to read.
Signed-off-by: Jeff Mahoney <jeffm@xxxxxxxx>
---
fs/reiserfs/super.c | 108 ++++++++++++++++++++++++----------------------------
1 file changed, 50 insertions(+), 58 deletions(-)
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1668,71 +1668,63 @@ static __u32 find_hash_out(struct super_
struct cpu_key key;
INITIALIZE_PATH(path);
struct reiserfs_dir_entry de;
+ struct reiserfs_de_head *deh;
__u32 hash = DEFAULT_HASH;
+ __u32 deh_hashval, teahash, r5hash, yurahash;
inode = s->s_root->d_inode;
- 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) {
+ pathrelse(&path);
+ return UNSET_HASH;
+ }
+ if (retval == NAME_NOT_FOUND)
+ de.de_entry_num--;
- make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
- retval = search_by_entry_key(s, &key, &path, &de);
- if (retval == IO_ERROR) {
- pathrelse(&path);
- return UNSET_HASH;
- }
- if (retval == NAME_NOT_FOUND)
- de.de_entry_num--;
- set_de_name_and_namelen(&de);
- if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
- /* allow override in this case */
- if (reiserfs_rupasov_hash(s)) {
- hash = YURA_HASH;
- }
- reiserfs_info(s, "FS seems to be empty, autodetect "
- "is using the default hash\n");
- break;
- }
- 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(s, "reiserfs-2506", "Unable to "
- "automatically detect hash function. "
- "Please mount with -o "
- "hash={tea,rupasov,r5}");
- hash = UNSET_HASH;
- break;
- }
- if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
- yurahash)
+ set_de_name_and_namelen(&de);
+ deh = de.de_deh + de.de_entry_num;
+
+ if (deh_offset(deh) == DOT_DOT_OFFSET) {
+ /* allow override in this case */
+ if (reiserfs_rupasov_hash(s))
hash = YURA_HASH;
- else if (GET_HASH_VALUE
- (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
- hash = TEA_HASH;
- else if (GET_HASH_VALUE
- (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
- hash = R5_HASH;
- else {
- reiserfs_warning(s, "reiserfs-2506",
- "Unrecognised hash function");
- hash = UNSET_HASH;
- }
- } while (0);
+ reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
+ goto out;
+ }
+
+ deh_hashval = GET_HASH_VALUE(deh_offset(deh));
+ 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 && deh_hashval == r5hash) ||
+ (teahash == yurahash && deh_hashval == yurahash) ||
+ (r5hash == yurahash && deh_hashval == yurahash)) {
+ reiserfs_warning(s, "reiserfs-2506",
+ "Unable to automatically detect hash "
+ "function. Please mount with -o "
+ "hash={tea,rupasov,r5}");
+ hash = UNSET_HASH;
+ goto out;
+ }
+
+ if (deh_hashval == yurahash)
+ hash = YURA_HASH;
+ else if (deh_hashval == teahash)
+ hash = TEA_HASH;
+ else if (deh_hashval == r5hash)
+ hash = R5_HASH;
+ else {
+ reiserfs_warning(s, "reiserfs-2506",
+ "Unrecognised hash function");
+ hash = UNSET_HASH;
+ goto out;
+ }
+ return hash;
+out:
pathrelse(&path);
return hash;
}
--
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