evin/ms-nfs41-client
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name cache: lookup returns flag is_negative

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added function entry_invis() in addition to entry_has_expired().  entry_invis() returns true if entry_has_expired() or for negative entries.  the is_negative flag is set for negative entries (defined as having entry->attributes == NULL), and returned by nfs41_name_cache_lookup().  when nfs41_lookup() sees this flag set, it returns the status without attempting to do any more lookups

Signed-off-by: Casey Bodley <cbodley@umich.edu>
This commit is contained in:
Casey Bodley 2010-10-11 16:04:06 -04:00
parent 55ff9d855d
commit 112313bc45
3 changed files with 39 additions and 21 deletions
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8
daemon/lookup.c
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@ -427,6 +427,7 @@ int nfs41_lookup(
nfs41_path_fh parent, target, *server_start;
const char *path_pos, *path_end;
struct lookup_referral referral;
bool_t negative = 0;
int status;
if (session_out) *session_out = session;
@ -448,10 +449,9 @@ int nfs41_lookup(
if (target_out == NULL) target_out = &target;
parent_out->fh.len = target_out->fh.len = 0;
status = nfs41_name_cache_lookup(cache,
path_pos, path_end, &path_pos,
&parent_out->fh, &target_out->fh, info_out);
if (status == NO_ERROR)
status = nfs41_name_cache_lookup(cache, path_pos, path_end, &path_pos,
&parent_out->fh, &target_out->fh, info_out, &negative);
if (status == NO_ERROR || negative)
goto out;
if (target_out->fh.len) {