Change name of list of states in cache_entry_t for simpler cscope examination

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Make fsal in cache_inode_key_t void * to assure it's not dereferenced

the struct fsal_module pointer is just used as an element of the key and
should not be dereferenced since a key does not hold an fsal module reference
and thus the pointer is not guaranteed to be valid.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
All NFS v4.0 ops that use an open/lock owner should check owner seqid the same

These ops all require the client to change the owner seqid, but also result
in a stateid seqid change. In order for the replay logic to work, we must
identify a potential replay based on the stateid seqid changing, and then
check the owner seqid for replay.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Use nfs4_sanity_check_FH for nfsa4_op_delegreturn

For correctness to RFC, replace NFS4ERR_ISDIR with NFS4ERR_INVAL.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Reorganize state_t and remove some typedefs

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
DELEGRETURN does not have an open/lock owner, don't call Copy_nfs4_state_req

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Hold state_lock in write for nfs4_return_one_state and state_lookup_layout_state

nfs4_return_one_state does a glist_length which requires the state lock,
since most callers hold the lock, change so all callers hold the lock.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Eliminate separate deleg_data structue

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Simplify delegrecall_context and delegrecall_one

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Free state_layout_recall_file list resources

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Fix a few places where an extra cache inode LRU reference was taken

cache_inode_create, cache_inode_lookup, and cache_inode_lookupp both return a
reference to the resulting entry, and that reference can be handed off to
data->current_entry.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Attach state_t to export uniformly inside state_add_impl

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Fix missing unlock in pseudo_mount_export

If cache_inode_inc_pin_ref fails, we must unlock the attr_lock taken above.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Replace FSAL_ESTALE, KILLED, and DEAD_ENTRY CACHE_INODE and STATE errors with ESTALE

These three errors all mean the same thing, so just use CACHE_INODE_ESTALE
and STATE_ESTALE.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Introduce return value to cache_inode_lru_ref to prevent new refs to stale entry

If a cache inode is stale (dead), we should prevent handing out additional
references where possible.

We add a new flag, LRU_REQ_STALE_OK, for those cases for which we need to take
a reference anyway. Also, this flag is temporarily used for cases where dealing
with the failure to get a reference is not easy. These cases WILL be fixed in
later patches (but use of this flag allows us to introduce the feature without
making things any worse). There will be at least one place where this flag will
still be useful.

When LRU_REQ_INITIAL is set, we always allow taking the reference since this
flag is only uses when the cache inode is initially found via the hash table
and thus should be valid (or at least was valid a moment ago).

If LRU_REQ_STALE_OK or LRU_REQ_INITIAL flags are used, the only possible
return is CACHE_INODE_SUCCESS thus it is legitimate to ignore the return
value.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Move dead entry cleanup to any unref as long as LRU_UNREF_QLOCKED is not set.

Make sure we only perform the cleanup once.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Convert export->state to atomic

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Add param to getrattr callback to better handle junction processing callbacks

Instead of relying on special parameter values and flags to determine what
the getattr callback is expected to accomplish, make it explicit with a
parameter.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
MORE Convert export->state to atomic

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
MORE Move dead entry cleanup to any unref as long as LRU_UNREF_QLOCKED is not set.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>