Commit e1ca12df authored by Bryan Schumaker's avatar Bryan Schumaker Committed by J. Bruce Fields

NFSD: added FREE_STATEID operation

This operation is used by the client to tell the server to free a
stateid.
Signed-off-by: default avatarBryan Schumaker <bjschuma@netapp.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent ebc63e53
...@@ -1417,6 +1417,11 @@ static struct nfsd4_operation nfsd4_ops[] = { ...@@ -1417,6 +1417,11 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_flags = OP_HANDLES_WRONGSEC, .op_flags = OP_HANDLES_WRONGSEC,
.op_name = "OP_SECINFO_NO_NAME", .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) static const char *nfsd4_op_name(unsigned opnum)
......
...@@ -60,9 +60,12 @@ static u64 current_sessionid = 1; ...@@ -60,9 +60,12 @@ static u64 current_sessionid = 1;
/* forward declarations */ /* forward declarations */
static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 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 * search_for_delegation(stateid_t *stid);
static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, 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 char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
static void nfs4_set_recdir(char *recdir); static void nfs4_set_recdir(char *recdir);
static int check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner);
/* Locking: */ /* Locking: */
...@@ -3137,6 +3140,11 @@ static int is_delegation_stateid(stateid_t *stateid) ...@@ -3137,6 +3140,11 @@ static int is_delegation_stateid(stateid_t *stateid)
return stateid->si_fileid == 0; return stateid->si_fileid == 0;
} }
static int is_open_stateid(struct nfs4_stateid *stateid)
{
return stateid->st_openstp == NULL;
}
/* /*
* Checks for stateid operations * Checks for stateid operations
*/ */
...@@ -3216,6 +3224,70 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, ...@@ -3216,6 +3224,70 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
return status; return status;
} }
static __be32
nfsd4_free_delegation_stateid(stateid_t *stateid)
{
struct nfs4_delegation *dp = search_for_delegation(stateid);
if (dp)
return nfserr_locks_held;
return nfserr_bad_stateid;
}
static __be32
nfsd4_free_lock_stateid(struct nfs4_stateid *stp)
{
if (check_for_locks(stp->st_file, stp->st_stateowner))
return nfserr_locks_held;
release_lock_stateid(stp);
return nfs_ok;
}
/*
* Free a state id
*/
__be32
nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_free_stateid *free_stateid)
{
stateid_t *stateid = &free_stateid->fr_stateid;
struct nfs4_stateid *stp;
__be32 ret;
nfs4_lock_state();
if (is_delegation_stateid(stateid)) {
ret = nfsd4_free_delegation_stateid(stateid);
goto out;
}
stp = search_for_stateid(stateid);
if (!stp) {
ret = nfserr_bad_stateid;
goto out;
}
if (stateid->si_generation != 0) {
if (stateid->si_generation < stp->st_stateid.si_generation) {
ret = nfserr_old_stateid;
goto out;
}
if (stateid->si_generation > stp->st_stateid.si_generation) {
ret = nfserr_bad_stateid;
goto out;
}
}
if (is_open_stateid(stp)) {
ret = nfserr_locks_held;
goto out;
} else {
ret = nfsd4_free_lock_stateid(stp);
goto out;
}
out:
nfs4_unlock_state();
return ret;
}
static inline int static inline int
setlkflg (int type) setlkflg (int type)
{ {
...@@ -3594,6 +3666,14 @@ static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; ...@@ -3594,6 +3666,14 @@ static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
static int
same_stateid(stateid_t *id_one, stateid_t *id_two)
{
if (id_one->si_stateownerid != id_two->si_stateownerid)
return 0;
return id_one->si_fileid == id_two->si_fileid;
}
static struct nfs4_stateid * static struct nfs4_stateid *
find_stateid(stateid_t *stid, int flags) find_stateid(stateid_t *stid, int flags)
{ {
...@@ -3623,6 +3703,44 @@ find_stateid(stateid_t *stid, int flags) ...@@ -3623,6 +3703,44 @@ find_stateid(stateid_t *stid, int flags)
return NULL; return NULL;
} }
static struct nfs4_stateid *
search_for_stateid(stateid_t *stid)
{
struct nfs4_stateid *local;
unsigned int hashval = stateid_hashval(stid->si_stateownerid, stid->si_fileid);
list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
if (same_stateid(&local->st_stateid, stid))
return local;
}
list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
if (same_stateid(&local->st_stateid, stid))
return local;
}
return NULL;
}
static struct nfs4_delegation *
search_for_delegation(stateid_t *stid)
{
struct nfs4_file *fp;
struct nfs4_delegation *dp;
struct list_head *pos;
int i;
for (i = 0; i < FILE_HASH_SIZE; i++) {
list_for_each_entry(fp, &file_hashtbl[i], fi_hash) {
list_for_each(pos, &fp->fi_delegations) {
dp = list_entry(pos, struct nfs4_delegation, dl_perfile);
if (same_stateid(&dp->dl_stateid, stid))
return dp;
}
}
}
return NULL;
}
static struct nfs4_delegation * static struct nfs4_delegation *
find_delegation_stateid(struct inode *ino, stateid_t *stid) find_delegation_stateid(struct inode *ino, stateid_t *stid)
{ {
......
...@@ -1245,6 +1245,19 @@ nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, ...@@ -1245,6 +1245,19 @@ nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
DECODE_TAIL; DECODE_TAIL;
} }
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 static __be32
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
struct nfsd4_sequence *seq) struct nfsd4_sequence *seq)
...@@ -1370,7 +1383,7 @@ static nfsd4_dec nfsd41_dec_ops[] = { ...@@ -1370,7 +1383,7 @@ static nfsd4_dec nfsd41_dec_ops[] = {
[OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
[OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
[OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_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_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_GETDEVICELIST] = (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, ...@@ -3115,6 +3128,21 @@ nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
return 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;
}
static __be32 static __be32
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
struct nfsd4_sequence *seq) struct nfsd4_sequence *seq)
...@@ -3196,7 +3224,7 @@ static nfsd4_enc nfsd4_enc_ops[] = { ...@@ -3196,7 +3224,7 @@ static nfsd4_enc nfsd4_enc_ops[] = {
[OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
[OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
[OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_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_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
......
...@@ -342,6 +342,11 @@ struct nfsd4_setclientid_confirm { ...@@ -342,6 +342,11 @@ struct nfsd4_setclientid_confirm {
nfs4_verifier sc_confirm; nfs4_verifier sc_confirm;
}; };
struct nfsd4_free_stateid {
stateid_t fr_stateid; /* request */
__be32 fr_status; /* response */
};
/* also used for NVERIFY */ /* also used for NVERIFY */
struct nfsd4_verify { struct nfsd4_verify {
u32 ve_bmval[3]; /* request */ u32 ve_bmval[3]; /* request */
...@@ -432,6 +437,7 @@ struct nfsd4_op { ...@@ -432,6 +437,7 @@ struct nfsd4_op {
struct nfsd4_destroy_session destroy_session; struct nfsd4_destroy_session destroy_session;
struct nfsd4_sequence sequence; struct nfsd4_sequence sequence;
struct nfsd4_reclaim_complete reclaim_complete; struct nfsd4_reclaim_complete reclaim_complete;
struct nfsd4_free_stateid free_stateid;
} u; } u;
struct nfs4_replay * replay; struct nfs4_replay * replay;
}; };
...@@ -564,6 +570,8 @@ extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp, ...@@ -564,6 +570,8 @@ extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr); struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr);
extern __be32 nfsd4_renew(struct svc_rqst *rqstp, extern __be32 nfsd4_renew(struct svc_rqst *rqstp,
struct nfsd4_compound_state *, clientid_t *clid); 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 #endif
/* /*
......
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