Piteball/android_kernel_samsung_msm8976
1
1
Fork 0
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git synced 2024-11-01 10:33:27 +00:00
Code Issues Projects Releases Wiki Activity

nfsd4: hash closed stateid's like any other

Browse source 
Look up closed stateid's in the stateid hash like any other stateid
rather than searching the close lru.

This is simpler, and fixes a bug: currently we handle only the case of a
close that is the last close for a given stateowner, but not the case of
a close for a stateowner that still has active opens on other files.
Thus in a case like:

	open(owner, file1)
	open(owner, file2)
	close(owner, file2)
	close(owner, file2)

the final close won't be recognized as a retransmission.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2011-09-16 20:12:38 -04:00
parent d3b313a463
commit f7a4d87207
2 changed files with 56 additions and 49 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

101
fs/nfsd/nfs4state.c
View file

@ -406,7 +406,6 @@ static int nfs4_access_to_omode(u32 access)
static void unhash_generic_stateid(struct nfs4_ol_stateid *stp)
{
list_del(&stp->st_stid.sc_hash);
list_del(&stp->st_perfile);
list_del(&stp->st_perstateowner);
}
@ -437,6 +436,7 @@ static void release_lock_stateid(struct nfs4_ol_stateid *stp)
struct file *file;
unhash_generic_stateid(stp);
list_del(&stp->st_stid.sc_hash);
file = find_any_file(stp->st_file);
if (file)
locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner));
@ -485,6 +485,7 @@ static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
static void release_open_stateid(struct nfs4_ol_stateid *stp)
{
unhash_open_stateid(stp);
list_del(&stp->st_stid.sc_hash);
free_generic_stateid(stp);
}
@ -501,12 +502,22 @@ static void unhash_openowner(struct nfs4_openowner *oo)
}
}
static void release_last_closed_stateid(struct nfs4_openowner *oo)
{
struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
if (s) {
list_del_init(&s->st_stid.sc_hash);
free_generic_stateid(s);
oo->oo_last_closed_stid = NULL;
}
}
static void release_openowner(struct nfs4_openowner *oo)
{
unhash_openowner(oo);
list_del(&oo->oo_close_lru);
if (oo->oo_last_closed_stid)
free_generic_stateid(oo->oo_last_closed_stid);
release_last_closed_stateid(oo);
nfs4_free_openowner(oo);
}
@ -3099,23 +3110,11 @@ laundromat_main(struct work_struct *not_used)
queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
}
static struct nfs4_openowner * search_close_lru(stateid_t *s)
static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
{
struct nfs4_openowner *local;
struct nfs4_ol_stateid *os;
list_for_each_entry(local, &close_lru, oo_close_lru) {
os = local->oo_last_closed_stid;
if (same_stateid(&os->st_stid.sc_stateid, s))
return local;
}
return NULL;
}
static inline int
nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
{
return fhp->fh_dentry->d_inode != stp->st_file->fi_inode;
if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode)
return nfserr_bad_stateid;
return nfs_ok;
}
static int
@ -3283,7 +3282,8 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
if (status)
goto out;
if (s->sc_type == NFS4_DELEG_STID) {
switch (s->sc_type) {
case NFS4_DELEG_STID:
dp = delegstateid(s);
status = nfs4_check_delegmode(dp, flags);
if (status)
@ -3293,10 +3293,12 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
*filpp = dp->dl_file->fi_deleg_file;
BUG_ON(!*filpp);
}
} else { /* open or lock stateid */
break;
case NFS4_OPEN_STID:
case NFS4_LOCK_STID:
stp = openlockstateid(s);
status = nfserr_bad_stateid;
if (nfs4_check_fh(current_fh, stp))
status = nfs4_check_fh(current_fh, stp);
if (status)
goto out;
if (stp->st_stateowner->so_is_open_owner
&& !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
@ -3311,6 +3313,9 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
else
*filpp = find_writeable_file(stp->st_file);
}
break;
default:
return nfserr_bad_stateid;
}
status = nfs_ok;
out:
@ -3362,6 +3367,9 @@ nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ret = nfsd4_free_lock_stateid(openlockstateid(s));
else
ret = nfserr_locks_held;
break;
default:
ret = nfserr_bad_stateid;
}
out:
nfs4_unlock_state();
@ -3390,12 +3398,19 @@ static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_
struct nfs4_stateowner *sop = stp->st_stateowner;
__be32 status;
if (nfs4_check_fh(current_fh, stp))
return nfserr_bad_stateid;
status = nfsd4_check_seqid(cstate, sop, seqid);
if (status)
return status;
return check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
if (stp->st_stid.sc_type == NFS4_CLOSED_STID)
/*
* "Closed" stateid's exist *only* to return
* nfserr_replay_me from the previous step.
*/
return nfserr_bad_stateid;
status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
if (status)
return status;
return nfs4_check_fh(current_fh, stp);
}
/*
@ -3564,8 +3579,13 @@ void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so)
return;
}
oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE;
free_generic_stateid(oo->oo_last_closed_stid);
oo->oo_last_closed_stid = NULL;
release_last_closed_stateid(oo);
}
static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
{
unhash_open_stateid(s);
s->st_stid.sc_type = NFS4_CLOSED_STID;
}
/*
@ -3584,24 +3604,10 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
cstate->current_fh.fh_dentry->d_name.name);
nfs4_lock_state();
/* check close_lru for replay */
status = nfs4_preprocess_confirmed_seqid_op(cstate, close->cl_seqid,
&close->cl_stateid, &stp);
if (stp == NULL && status == nfserr_expired) {
/*
* Also, we should make sure this isn't just the result of
* a replayed close:
*/
oo = search_close_lru(&close->cl_stateid);
/* It's not stale; let's assume it's expired: */
if (oo == NULL)
goto out;
cstate->replay_owner = &oo->oo_owner;
status = nfsd4_check_seqid(cstate, &oo->oo_owner, close->cl_seqid);
if (status)
goto out;
status = nfserr_bad_seqid;
}
status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
&close->cl_stateid,
NFS4_OPEN_STID|NFS4_CLOSED_STID,
&stp);
if (status)
goto out;
oo = openowner(stp->st_stateowner);
@ -3609,9 +3615,8 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
update_stateid(&stp->st_stid.sc_stateid);
memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
/* unhash_open_stateid() calls nfsd_close() if needed */
nfsd4_close_open_stateid(stp);
oo->oo_last_closed_stid = stp;
unhash_open_stateid(stp);
/* place unused nfs4_stateowners on so_close_lru list to be
* released by the laundromat service after the lease period

4
fs/nfsd/state.h
View file

@ -76,7 +76,9 @@ struct nfs4_stid {
#define NFS4_OPEN_STID 1
#define NFS4_LOCK_STID 2
#define NFS4_DELEG_STID 4
char sc_type;
/* For an open stateid kept around *only* to process close replays: */
#define NFS4_CLOSED_STID 8
unsigned char sc_type;
struct list_head sc_hash;
stateid_t sc_stateid;
};