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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-06-10 07:51:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-06-10 20:21:46 -0700 |
| commit | 8387ff2577eb9ed245df9a39947f66976c6bcd02 (patch) | |
| tree | 79fafcb5777f16e520d1c39e9389039f866b4c6d /security/tomoyo | |
| parent | 147d9e7bcad3b8d5465f6eea6292731e7f35dee8 (diff) | |
| download | op-kernel-dev-8387ff2577eb9ed245df9a39947f66976c6bcd02.zip op-kernel-dev-8387ff2577eb9ed245df9a39947f66976c6bcd02.tar.gz | |
vfs: make the string hashes salt the hash
We always mixed in the parent pointer into the dentry name hash, but we
did it late at lookup time. It turns out that we can simplify that
lookup-time action by salting the hash with the parent pointer early
instead of late.
A few other users of our string hashes also wanted to mix in their own
pointers into the hash, and those are updated to use the same mechanism.
Hash users that don't have any particular initial salt can just use the
NULL pointer as a no-salt.
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: George Spelvin <linux@sciencehorizons.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security/tomoyo')
| -rw-r--r-- | security/tomoyo/memory.c | 2 | ||||
| -rw-r--r-- | security/tomoyo/util.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/security/tomoyo/memory.c b/security/tomoyo/memory.c index 0e99571..1598b55 100644 --- a/security/tomoyo/memory.c +++ b/security/tomoyo/memory.c @@ -154,7 +154,7 @@ const struct tomoyo_path_info *tomoyo_get_name(const char *name) if (!name) return NULL; len = strlen(name) + 1; - hash = full_name_hash((const unsigned char *) name, len - 1); + hash = full_name_hash(NULL, (const unsigned char *) name, len - 1); head = &tomoyo_name_list[hash_long(hash, TOMOYO_HASH_BITS)]; if (mutex_lock_interruptible(&tomoyo_policy_lock)) return NULL; diff --git a/security/tomoyo/util.c b/security/tomoyo/util.c index b974a69..5fe3679 100644 --- a/security/tomoyo/util.c +++ b/security/tomoyo/util.c @@ -666,7 +666,7 @@ void tomoyo_fill_path_info(struct tomoyo_path_info *ptr) ptr->const_len = tomoyo_const_part_length(name); ptr->is_dir = len && (name[len - 1] == '/'); ptr->is_patterned = (ptr->const_len < len); - ptr->hash = full_name_hash(name, len); + ptr->hash = full_name_hash(NULL, name, len); } /** |
