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UBIFS: always read hashed-key nodes under TNC mutex 

Leaf-nodes that have a hashed key are stored in the
leaf-node-cache (LNC) which is protected by the TNC
mutex.  Consequently, when reading a leaf node with
a hashed key (i.e. directory entries, xattr entries)
the TNC mutex is always required.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
This commit is contained in:
Adrian Hunter 2008-08-20 16:32:40 +03:00 committed by Artem Bityutskiy
parent 04da11bfcf
commit 761e29f3bb
1 changed files with 1 additions and 6 deletions
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7
fs/ubifs/tnc.c
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@ -1498,7 +1498,6 @@ static int do_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
{
int found, n, err;
struct ubifs_znode *znode;
struct ubifs_zbranch zbr;
dbg_tnc("name '%.*s' key %s", nm->len, nm->name, DBGKEY(key));
mutex_lock(&c->tnc_mutex);
@ -1522,11 +1521,7 @@ static int do_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
goto out_unlock;
}
zbr = znode->zbranch[n];
mutex_unlock(&c->tnc_mutex);
err = tnc_read_node_nm(c, &zbr, node);
return err;
err = tnc_read_node_nm(c, &znode->zbranch[n], node);
out_unlock:
mutex_unlock(&c->tnc_mutex);