From: Bryan Schumaker <bjschuma@xxxxxxxxxx>
This operation is used by the client to tell the server to free a
stateid.
Signed-off-by: Bryan Schumaker <bjschuma@xxxxxxxxxx>
---
fs/nfsd/nfs4proc.c | 5 ++++
fs/nfsd/nfs4state.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++
fs/nfsd/nfs4xdr.c | 32 +++++++++++++++++++++++++++-
fs/nfsd/xdr4.h | 8 +++++++
4 files changed, 99 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 3a6dbd7..7e00116 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1412,6 +1412,11 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_flags = OP_HANDLES_WRONGSEC,
.op_name = "OP_SECINFO_NO_NAME",
},
+ [OP_FREE_STATEID] = {
+ .op_func = (nfsd4op_func)nfsd4_free_stateid,
+ .op_flags = ALLOWED_WITHOUT_FH,
+ .op_name = "OP_FREE_STATEID",
+ },
};
static const char *nfsd4_op_name(unsigned opnum)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index a2ea14f..6beec13 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -60,6 +60,7 @@ static u64 current_sessionid = 1;
/* forward declarations */
static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
+static struct nfs4_stateid * search_for_stateid(stateid_t *stid);
static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
static void nfs4_set_recdir(char *recdir);
@@ -316,6 +317,12 @@ static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
static struct list_head client_lru;
static struct list_head close_lru;
+static int
+stateid_has_locks(struct nfs4_stateid *stp)
+{
+ return list_empty(&stp->st_lockowners);
+}
+
/*
* We store the NONE, READ, WRITE, and BOTH bits separately in the
* st_{access,deny}_bmap field of the stateid, in order to track not
@@ -3212,6 +3219,33 @@ out:
return status;
}
+/*
+ * Free a state id
+ */
+__be32
+nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_free_stateid *free_stateid)
+{
+ struct nfs4_stateid *stp = NULL;
+ stateid_t *stateid = &free_stateid->fr_stateid;
+
+ stp = search_for_stateid(stateid);
+ if (!stp)
+ return nfserr_bad_stateid;
+ if (stateid->si_generation != 0) {
+ if (stateid->si_generation < stp->st_stateid.si_generation)
+ return nfserr_old_stateid;
+ if (stateid->si_generation > stp->st_stateid.si_generation)
+ return nfserr_bad_stateid;
+ }
+
+ if (stateid_has_locks(stp))
+ return nfserr_locks_held;
+ if (stp)
+ release_open_stateid(stp);
+ return nfs_ok;
+}
+
static inline int
setlkflg (int type)
{
@@ -3619,6 +3653,28 @@ find_stateid(stateid_t *stid, int flags)
return NULL;
}
+static struct nfs4_stateid *
+search_for_stateid(stateid_t *stid)
+{
+ struct nfs4_stateid *local;
+ u32 st_id = stid->si_stateownerid;
+ u32 f_id = stid->si_fileid;
+ unsigned int hashval = stateid_hashval(st_id, f_id);
+
+ list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
+ if ((local->st_stateid.si_stateownerid == st_id) &&
+ (local->st_stateid.si_fileid == f_id))
+ return local;
+ }
+
+ list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
+ if ((local->st_stateid.si_stateownerid == st_id) &&
+ (local->st_stateid.si_fileid == f_id))
+ return local;
+ }
+ return NULL;
+}
+
static struct nfs4_delegation *
find_delegation_stateid(struct inode *ino, stateid_t *stid)
{
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 195a91d..5da6874 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1246,6 +1246,19 @@ nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
}
static __be32
+nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
+ struct nfsd4_free_stateid *free_stateid)
+{
+ DECODE_HEAD;
+
+ READ_BUF(sizeof(stateid_t));
+ READ32(free_stateid->fr_stateid.si_generation);
+ COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
+
+ DECODE_TAIL;
+}
+
+static __be32
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
struct nfsd4_sequence *seq)
{
@@ -1370,7 +1383,7 @@ static nfsd4_dec nfsd41_dec_ops[] = {
[OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
[OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
[OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
- [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
[OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
@@ -3115,6 +3128,21 @@ nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
return nfserr;
}
+static __be32
+nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
+ struct nfsd4_free_stateid *free_stateid)
+{
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ RESERVE_SPACE(4);
+ WRITE32(nfserr);
+ ADJUST_ARGS();
+ return nfserr;
+}
+
__be32
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
struct nfsd4_sequence *seq)
@@ -3196,7 +3224,7 @@ static nfsd4_enc nfsd4_enc_ops[] = {
[OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
[OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
[OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
- [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
[OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index 366401e..ed1784d 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -342,6 +342,11 @@ struct nfsd4_setclientid_confirm {
nfs4_verifier sc_confirm;
};
+struct nfsd4_free_stateid {
+ stateid_t fr_stateid; /* request */
+ __be32 fr_status; /* response */
+};
+
/* also used for NVERIFY */
struct nfsd4_verify {
u32 ve_bmval[3]; /* request */
@@ -432,6 +437,7 @@ struct nfsd4_op {
struct nfsd4_destroy_session destroy_session;
struct nfsd4_sequence sequence;
struct nfsd4_reclaim_complete reclaim_complete;
+ struct nfsd4_free_stateid free_stateid;
} u;
struct nfs4_replay * replay;
};
@@ -564,6 +570,8 @@ extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr);
extern __be32 nfsd4_renew(struct svc_rqst *rqstp,
struct nfsd4_compound_state *, clientid_t *clid);
+extern __be32 nfsd4_free_stateid(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *, struct nfsd4_free_stateid *free_stateid);
#endif
/*
--
1.7.5.1
--
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