diff options
Diffstat (limited to 'fs/nfsd/nfs4state.c')
| -rw-r--r-- | fs/nfsd/nfs4state.c | 76 |
1 files changed, 37 insertions, 39 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index ae5d25075f6..1f8c781c2a2 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -215,13 +215,12 @@ static inline int get_new_stid(struct nfs4_stid *stid) int new_stid; int error; - if (!idr_pre_get(stateids, GFP_KERNEL)) - return -ENOMEM; - error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); /* - * All this code is currently serialized; the preallocation - * above should still be ours: + * Note: the necessary preallocation was done in + * nfs4_alloc_stateid(). The idr code caps the number of + * preallocations that can exist at a time, but the state lock + * prevents anyone from using ours before we get here: */ BUG_ON(error); /* @@ -240,7 +239,7 @@ static inline int get_new_stid(struct nfs4_stid *stid) return new_stid; } -static inline __be32 init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) +static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) { stateid_t *s = &stid->sc_stateid; int new_id; @@ -249,12 +248,24 @@ static inline __be32 init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, u stid->sc_client = cl; s->si_opaque.so_clid = cl->cl_clientid; new_id = get_new_stid(stid); - if (new_id < 0) - return nfserr_jukebox; s->si_opaque.so_id = (u32)new_id; /* Will be incremented before return to client: */ s->si_generation = 0; - return 0; +} + +static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) +{ + struct idr *stateids = &cl->cl_stateids; + + if (!idr_pre_get(stateids, GFP_KERNEL)) + return NULL; + /* + * Note: if we fail here (or any time between now and the time + * we actually get the new idr), we won't need to undo the idr + * preallocation, since the idr code caps the number of + * preallocated entries. + */ + return kmem_cache_alloc(slab, GFP_KERNEL); } static struct nfs4_delegation * @@ -262,7 +273,6 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct sv { struct nfs4_delegation *dp; struct nfs4_file *fp = stp->st_file; - __be32 status; dprintk("NFSD alloc_init_deleg\n"); /* @@ -276,14 +286,10 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct sv return NULL; if (num_delegations > max_delegations) return NULL; - dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); + dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); if (dp == NULL) return dp; - status = init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); - if (status) { - kmem_cache_free(deleg_slab, dp); - return NULL; - } + init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); /* * delegation seqid's are never incremented. The 4.1 special * meaning of seqid 0 isn't meaningful, really, but let's avoid @@ -2331,14 +2337,11 @@ alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, str return oo; } -static inline __be32 init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { +static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { struct nfs4_openowner *oo = open->op_openowner; struct nfs4_client *clp = oo->oo_owner.so_client; - __be32 status; - status = init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); - if (status) - return status; + init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); INIT_LIST_HEAD(&stp->st_lockowners); list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); list_add(&stp->st_perfile, &fp->fi_stateids); @@ -2350,7 +2353,6 @@ static inline __be32 init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_ __set_bit(open->op_share_access, &stp->st_access_bmap); __set_bit(open->op_share_deny, &stp->st_deny_bmap); stp->st_openstp = NULL; - return nfs_ok; } static void @@ -2614,10 +2616,14 @@ nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_st return nfs_ok; } -static inline struct nfs4_ol_stateid * -nfs4_alloc_stateid(void) +static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) { - return kmem_cache_alloc(stateid_slab, GFP_KERNEL); + return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); +} + +static void nfs4_free_stateid(struct nfs4_ol_stateid *s) +{ + kmem_cache_free(stateid_slab, s); } static inline int nfs4_access_to_access(u32 nfs4_access) @@ -2661,15 +2667,16 @@ nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_ol_stateid **stpp, struct nfsd4_open *open) { struct nfs4_ol_stateid *stp; + struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; __be32 status; - stp = nfs4_alloc_stateid(); + stp = nfs4_alloc_stateid(cl); if (stp == NULL) return nfserr_jukebox; status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); if (status) { - kmem_cache_free(stateid_slab, stp); + nfs4_free_stateid(stp); return status; } *stpp = stp; @@ -2912,11 +2919,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); if (status) goto out; - status = init_open_stateid(stp, fp, open); - if (status) { - release_open_stateid(stp); - goto out; - } + init_open_stateid(stp, fp, open); status = nfsd4_truncate(rqstp, current_fh, open); if (status) { release_open_stateid(stp); @@ -3812,16 +3815,11 @@ alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct { struct nfs4_ol_stateid *stp; struct nfs4_client *clp = lo->lo_owner.so_client; - __be32 status; - stp = nfs4_alloc_stateid(); + stp = nfs4_alloc_stateid(clp); if (stp == NULL) return NULL; - status = init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); - if (status) { - free_generic_stateid(stp); - return NULL; - } + init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); list_add(&stp->st_perfile, &fp->fi_stateids); list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); stp->st_stateowner = &lo->lo_owner; |