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-rw-r--r--fs/nfsd/Kconfig10
-rw-r--r--fs/nfsd/Makefile1
-rw-r--r--fs/nfsd/export.c8
-rw-r--r--fs/nfsd/export.h2
-rw-r--r--fs/nfsd/nfs4layouts.c487
-rw-r--r--fs/nfsd/nfs4proc.c302
-rw-r--r--fs/nfsd/nfs4state.c16
-rw-r--r--fs/nfsd/nfs4xdr.c312
-rw-r--r--fs/nfsd/nfsctl.c9
-rw-r--r--fs/nfsd/nfsd.h16
-rw-r--r--fs/nfsd/pnfs.h80
-rw-r--r--fs/nfsd/state.h21
-rw-r--r--fs/nfsd/xdr4.h59
13 files changed, 1319 insertions, 4 deletions
diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig
index 73395156bdb4..683bf718aead 100644
--- a/fs/nfsd/Kconfig
+++ b/fs/nfsd/Kconfig
@@ -82,6 +82,16 @@ config NFSD_V4
If unsure, say N.
+config NFSD_PNFS
+ bool "NFSv4.1 server support for Parallel NFS (pNFS)"
+ depends on NFSD_V4
+ help
+ This option enables support for the parallel NFS features of the
+ minor version 1 of the NFSv4 protocol (RFC5661) in the kernel's NFS
+ server.
+
+ If unsure, say N.
+
config NFSD_V4_SECURITY_LABEL
bool "Provide Security Label support for NFSv4 server"
depends on NFSD_V4 && SECURITY
diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile
index af32ef06b4fe..5806270a8567 100644
--- a/fs/nfsd/Makefile
+++ b/fs/nfsd/Makefile
@@ -12,3 +12,4 @@ nfsd-$(CONFIG_NFSD_V3) += nfs3proc.o nfs3xdr.o
nfsd-$(CONFIG_NFSD_V3_ACL) += nfs3acl.o
nfsd-$(CONFIG_NFSD_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \
nfs4acl.o nfs4callback.o nfs4recover.o
+nfsd-$(CONFIG_NFSD_PNFS) += nfs4layouts.o
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 30a739d896ff..c3e3b6e55ae2 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -20,6 +20,7 @@
#include "nfsd.h"
#include "nfsfh.h"
#include "netns.h"
+#include "pnfs.h"
#define NFSDDBG_FACILITY NFSDDBG_EXPORT
@@ -545,6 +546,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
exp.ex_client = dom;
exp.cd = cd;
+ exp.ex_devid_map = NULL;
/* expiry */
err = -EINVAL;
@@ -621,6 +623,8 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
if (!gid_valid(exp.ex_anon_gid))
goto out4;
err = 0;
+
+ nfsd4_setup_layout_type(&exp);
}
expp = svc_export_lookup(&exp);
@@ -703,6 +707,7 @@ static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
new->ex_fslocs.locations = NULL;
new->ex_fslocs.locations_count = 0;
new->ex_fslocs.migrated = 0;
+ new->ex_layout_type = 0;
new->ex_uuid = NULL;
new->cd = item->cd;
}
@@ -717,6 +722,8 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem)
new->ex_anon_uid = item->ex_anon_uid;
new->ex_anon_gid = item->ex_anon_gid;
new->ex_fsid = item->ex_fsid;
+ new->ex_devid_map = item->ex_devid_map;
+ item->ex_devid_map = NULL;
new->ex_uuid = item->ex_uuid;
item->ex_uuid = NULL;
new->ex_fslocs.locations = item->ex_fslocs.locations;
@@ -725,6 +732,7 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem)
item->ex_fslocs.locations_count = 0;
new->ex_fslocs.migrated = item->ex_fslocs.migrated;
item->ex_fslocs.migrated = 0;
+ new->ex_layout_type = item->ex_layout_type;
new->ex_nflavors = item->ex_nflavors;
for (i = 0; i < MAX_SECINFO_LIST; i++) {
new->ex_flavors[i] = item->ex_flavors[i];
diff --git a/fs/nfsd/export.h b/fs/nfsd/export.h
index 04dc8c167b0c..1f52bfcc436f 100644
--- a/fs/nfsd/export.h
+++ b/fs/nfsd/export.h
@@ -56,6 +56,8 @@ struct svc_export {
struct nfsd4_fs_locations ex_fslocs;
uint32_t ex_nflavors;
struct exp_flavor_info ex_flavors[MAX_SECINFO_LIST];
+ enum pnfs_layouttype ex_layout_type;
+ struct nfsd4_deviceid_map *ex_devid_map;
struct cache_detail *cd;
};
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
new file mode 100644
index 000000000000..8273270418b1
--- /dev/null
+++ b/fs/nfsd/nfs4layouts.c
@@ -0,0 +1,487 @@
+/*
+ * Copyright (c) 2014 Christoph Hellwig.
+ */
+#include <linux/jhash.h>
+#include <linux/sched.h>
+
+#include "pnfs.h"
+#include "netns.h"
+
+#define NFSDDBG_FACILITY NFSDDBG_PNFS
+
+struct nfs4_layout {
+ struct list_head lo_perstate;
+ struct nfs4_layout_stateid *lo_state;
+ struct nfsd4_layout_seg lo_seg;
+};
+
+static struct kmem_cache *nfs4_layout_cache;
+static struct kmem_cache *nfs4_layout_stateid_cache;
+
+const struct nfsd4_layout_ops *nfsd4_layout_ops[LAYOUT_TYPE_MAX] = {
+};
+
+/* pNFS device ID to export fsid mapping */
+#define DEVID_HASH_BITS 8
+#define DEVID_HASH_SIZE (1 << DEVID_HASH_BITS)
+#define DEVID_HASH_MASK (DEVID_HASH_SIZE - 1)
+static u64 nfsd_devid_seq = 1;
+static struct list_head nfsd_devid_hash[DEVID_HASH_SIZE];
+static DEFINE_SPINLOCK(nfsd_devid_lock);
+
+static inline u32 devid_hashfn(u64 idx)
+{
+ return jhash_2words(idx, idx >> 32, 0) & DEVID_HASH_MASK;
+}
+
+static void
+nfsd4_alloc_devid_map(const struct svc_fh *fhp)
+{
+ const struct knfsd_fh *fh = &fhp->fh_handle;
+ size_t fsid_len = key_len(fh->fh_fsid_type);
+ struct nfsd4_deviceid_map *map, *old;
+ int i;
+
+ map = kzalloc(sizeof(*map) + fsid_len, GFP_KERNEL);
+ if (!map)
+ return;
+
+ map->fsid_type = fh->fh_fsid_type;
+ memcpy(&map->fsid, fh->fh_fsid, fsid_len);
+
+ spin_lock(&nfsd_devid_lock);
+ if (fhp->fh_export->ex_devid_map)
+ goto out_unlock;
+
+ for (i = 0; i < DEVID_HASH_SIZE; i++) {
+ list_for_each_entry(old, &nfsd_devid_hash[i], hash) {
+ if (old->fsid_type != fh->fh_fsid_type)
+ continue;
+ if (memcmp(old->fsid, fh->fh_fsid,
+ key_len(old->fsid_type)))
+ continue;
+
+ fhp->fh_export->ex_devid_map = old;
+ goto out_unlock;
+ }
+ }
+
+ map->idx = nfsd_devid_seq++;
+ list_add_tail_rcu(&map->hash, &nfsd_devid_hash[devid_hashfn(map->idx)]);
+ fhp->fh_export->ex_devid_map = map;
+ map = NULL;
+
+out_unlock:
+ spin_unlock(&nfsd_devid_lock);
+ kfree(map);
+}
+
+struct nfsd4_deviceid_map *
+nfsd4_find_devid_map(int idx)
+{
+ struct nfsd4_deviceid_map *map, *ret = NULL;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(map, &nfsd_devid_hash[devid_hashfn(idx)], hash)
+ if (map->idx == idx)
+ ret = map;
+ rcu_read_unlock();
+
+ return ret;
+}
+
+int
+nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
+ u32 device_generation)
+{
+ if (!fhp->fh_export->ex_devid_map) {
+ nfsd4_alloc_devid_map(fhp);
+ if (!fhp->fh_export->ex_devid_map)
+ return -ENOMEM;
+ }
+
+ id->fsid_idx = fhp->fh_export->ex_devid_map->idx;
+ id->generation = device_generation;
+ id->pad = 0;
+ return 0;
+}
+
+void nfsd4_setup_layout_type(struct svc_export *exp)
+{
+ if (exp->ex_flags & NFSEXP_NOPNFS)
+ return;
+}
+
+static void
+nfsd4_free_layout_stateid(struct nfs4_stid *stid)
+{
+ struct nfs4_layout_stateid *ls = layoutstateid(stid);
+ struct nfs4_client *clp = ls->ls_stid.sc_client;
+ struct nfs4_file *fp = ls->ls_stid.sc_file;
+
+ spin_lock(&clp->cl_lock);
+ list_del_init(&ls->ls_perclnt);
+ spin_unlock(&clp->cl_lock);
+
+ spin_lock(&fp->fi_lock);
+ list_del_init(&ls->ls_perfile);
+ spin_unlock(&fp->fi_lock);
+
+ kmem_cache_free(nfs4_layout_stateid_cache, ls);
+}
+
+static struct nfs4_layout_stateid *
+nfsd4_alloc_layout_stateid(struct nfsd4_compound_state *cstate,
+ struct nfs4_stid *parent, u32 layout_type)
+{
+ struct nfs4_client *clp = cstate->clp;
+ struct nfs4_file *fp = parent->sc_file;
+ struct nfs4_layout_stateid *ls;
+ struct nfs4_stid *stp;
+
+ stp = nfs4_alloc_stid(cstate->clp, nfs4_layout_stateid_cache);
+ if (!stp)
+ return NULL;
+ stp->sc_free = nfsd4_free_layout_stateid;
+ get_nfs4_file(fp);
+ stp->sc_file = fp;
+
+ ls = layoutstateid(stp);
+ INIT_LIST_HEAD(&ls->ls_perclnt);
+ INIT_LIST_HEAD(&ls->ls_perfile);
+ spin_lock_init(&ls->ls_lock);
+ INIT_LIST_HEAD(&ls->ls_layouts);
+ ls->ls_layout_type = layout_type;
+
+ spin_lock(&clp->cl_lock);
+ stp->sc_type = NFS4_LAYOUT_STID;
+ list_add(&ls->ls_perclnt, &clp->cl_lo_states);
+ spin_unlock(&clp->cl_lock);
+
+ spin_lock(&fp->fi_lock);
+ list_add(&ls->ls_perfile, &fp->fi_lo_states);
+ spin_unlock(&fp->fi_lock);
+
+ return ls;
+}
+
+__be32
+nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate, stateid_t *stateid,
+ bool create, u32 layout_type, struct nfs4_layout_stateid **lsp)
+{
+ struct nfs4_layout_stateid *ls;
+ struct nfs4_stid *stid;
+ unsigned char typemask = NFS4_LAYOUT_STID;
+ __be32 status;
+
+ if (create)
+ typemask |= (NFS4_OPEN_STID | NFS4_LOCK_STID | NFS4_DELEG_STID);
+
+ status = nfsd4_lookup_stateid(cstate, stateid, typemask, &stid,
+ net_generic(SVC_NET(rqstp), nfsd_net_id));
+ if (status)
+ goto out;
+
+ if (!fh_match(&cstate->current_fh.fh_handle,
+ &stid->sc_file->fi_fhandle)) {
+ status = nfserr_bad_stateid;
+ goto out_put_stid;
+ }
+
+ if (stid->sc_type != NFS4_LAYOUT_STID) {
+ ls = nfsd4_alloc_layout_stateid(cstate, stid, layout_type);
+ nfs4_put_stid(stid);
+
+ status = nfserr_jukebox;
+ if (!ls)
+ goto out;
+ } else {
+ ls = container_of(stid, struct nfs4_layout_stateid, ls_stid);
+
+ status = nfserr_bad_stateid;
+ if (stateid->si_generation > stid->sc_stateid.si_generation)
+ goto out_put_stid;
+ if (layout_type != ls->ls_layout_type)
+ goto out_put_stid;
+ }
+
+ *lsp = ls;
+ return 0;
+
+out_put_stid:
+ nfs4_put_stid(stid);
+out:
+ return status;
+}
+
+static inline u64
+layout_end(struct nfsd4_layout_seg *seg)
+{
+ u64 end = seg->offset + seg->length;
+ return end >= seg->offset ? end : NFS4_MAX_UINT64;
+}
+
+static void
+layout_update_len(struct nfsd4_layout_seg *lo, u64 end)
+{
+ if (end == NFS4_MAX_UINT64)
+ lo->length = NFS4_MAX_UINT64;
+ else
+ lo->length = end - lo->offset;
+}
+
+static bool
+layouts_overlapping(struct nfs4_layout *lo, struct nfsd4_layout_seg *s)
+{
+ if (s->iomode != IOMODE_ANY && s->iomode != lo->lo_seg.iomode)
+ return false;
+ if (layout_end(&lo->lo_seg) <= s->offset)
+ return false;
+ if (layout_end(s) <= lo->lo_seg.offset)
+ return false;
+ return true;
+}
+
+static bool
+layouts_try_merge(struct nfsd4_layout_seg *lo, struct nfsd4_layout_seg *new)
+{
+ if (lo->iomode != new->iomode)
+ return false;
+ if (layout_end(new) < lo->offset)
+ return false;
+ if (layout_end(lo) < new->offset)
+ return false;
+
+ lo->offset = min(lo->offset, new->offset);
+ layout_update_len(lo, max(layout_end(lo), layout_end(new)));
+ return true;
+}
+
+__be32
+nfsd4_insert_layout(struct nfsd4_layoutget *lgp, struct nfs4_layout_stateid *ls)
+{
+ struct nfsd4_layout_seg *seg = &lgp->lg_seg;
+ struct nfs4_layout *lp, *new = NULL;
+
+ spin_lock(&ls->ls_lock);
+ list_for_each_entry(lp, &ls->ls_layouts, lo_perstate) {
+ if (layouts_try_merge(&lp->lo_seg, seg))
+ goto done;
+ }
+ spin_unlock(&ls->ls_lock);
+
+ new = kmem_cache_alloc(nfs4_layout_cache, GFP_KERNEL);
+ if (!new)
+ return nfserr_jukebox;
+ memcpy(&new->lo_seg, seg, sizeof(lp->lo_seg));
+ new->lo_state = ls;
+
+ spin_lock(&ls->ls_lock);
+ list_for_each_entry(lp, &ls->ls_layouts, lo_perstate) {
+ if (layouts_try_merge(&lp->lo_seg, seg))
+ goto done;
+ }
+
+ atomic_inc(&ls->ls_stid.sc_count);
+ list_add_tail(&new->lo_perstate, &ls->ls_layouts);
+ new = NULL;
+done:
+ update_stateid(&ls->ls_stid.sc_stateid);
+ memcpy(&lgp->lg_sid, &ls->ls_stid.sc_stateid, sizeof(stateid_t));
+ spin_unlock(&ls->ls_lock);
+ if (new)
+ kmem_cache_free(nfs4_layout_cache, new);
+ return nfs_ok;
+}
+
+static void
+nfsd4_free_layouts(struct list_head *reaplist)
+{
+ while (!list_empty(reaplist)) {
+ struct nfs4_layout *lp = list_first_entry(reaplist,
+ struct nfs4_layout, lo_perstate);
+
+ list_del(&lp->lo_perstate);
+ nfs4_put_stid(&lp->lo_state->ls_stid);
+ kmem_cache_free(nfs4_layout_cache, lp);
+ }
+}
+
+static void
+nfsd4_return_file_layout(struct nfs4_layout *lp, struct nfsd4_layout_seg *seg,
+ struct list_head *reaplist)
+{
+ struct nfsd4_layout_seg *lo = &lp->lo_seg;
+ u64 end = layout_end(lo);
+
+ if (seg->offset <= lo->offset) {
+ if (layout_end(seg) >= end) {
+ list_move_tail(&lp->lo_perstate, reaplist);
+ return;
+ }
+ end = seg->offset;
+ } else {
+ /* retain the whole layout segment on a split. */
+ if (layout_end(seg) < end) {
+ dprintk("%s: split not supported\n", __func__);
+ return;
+ }
+
+ lo->offset = layout_end(seg);
+ }
+
+ layout_update_len(lo, end);
+}
+
+__be32
+nfsd4_return_file_layouts(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_layoutreturn *lrp)
+{
+ struct nfs4_layout_stateid *ls;
+ struct nfs4_layout *lp, *n;
+ LIST_HEAD(reaplist);
+ __be32 nfserr;
+ int found = 0;
+
+ nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lrp->lr_sid,
+ false, lrp->lr_layout_type,
+ &ls);
+ if (nfserr)
+ return nfserr;
+
+ spin_lock(&ls->ls_lock);
+ list_for_each_entry_safe(lp, n, &ls->ls_layouts, lo_perstate) {
+ if (layouts_overlapping(lp, &lrp->lr_seg)) {
+ nfsd4_return_file_layout(lp, &lrp->lr_seg, &reaplist);
+ found++;
+ }
+ }
+ if (!list_empty(&ls->ls_layouts)) {
+ if (found) {
+ update_stateid(&ls->ls_stid.sc_stateid);
+ memcpy(&lrp->lr_sid, &ls->ls_stid.sc_stateid,
+ sizeof(stateid_t));
+ }
+ lrp->lrs_present = 1;
+ } else {
+ nfs4_unhash_stid(&ls->ls_stid);
+ lrp->lrs_present = 0;
+ }
+ spin_unlock(&ls->ls_lock);
+
+ nfs4_put_stid(&ls->ls_stid);
+ nfsd4_free_layouts(&reaplist);
+ return nfs_ok;
+}
+
+__be32
+nfsd4_return_client_layouts(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_layoutreturn *lrp)
+{
+ struct nfs4_layout_stateid *ls, *n;
+ struct nfs4_client *clp = cstate->clp;
+ struct nfs4_layout *lp, *t;
+ LIST_HEAD(reaplist);
+
+ lrp->lrs_present = 0;
+
+ spin_lock(&clp->cl_lock);
+ list_for_each_entry_safe(ls, n, &clp->cl_lo_states, ls_perclnt) {
+ if (lrp->lr_return_type == RETURN_FSID &&
+ !fh_fsid_match(&ls->ls_stid.sc_file->fi_fhandle,
+ &cstate->current_fh.fh_handle))
+ continue;
+
+ spin_lock(&ls->ls_lock);
+ list_for_each_entry_safe(lp, t, &ls->ls_layouts, lo_perstate) {
+ if (lrp->lr_seg.iomode == IOMODE_ANY ||
+ lrp->lr_seg.iomode == lp->lo_seg.iomode)
+ list_move_tail(&lp->lo_perstate, &reaplist);
+ }
+ spin_unlock(&ls->ls_lock);
+ }
+ spin_unlock(&clp->cl_lock);
+
+ nfsd4_free_layouts(&reaplist);
+ return 0;
+}
+
+static void
+nfsd4_return_all_layouts(struct nfs4_layout_stateid *ls,
+ struct list_head *reaplist)
+{
+ spin_lock(&ls->ls_lock);
+ list_splice_init(&ls->ls_layouts, reaplist);
+ spin_unlock(&ls->ls_lock);
+}
+
+void
+nfsd4_return_all_client_layouts(struct nfs4_client *clp)
+{
+ struct nfs4_layout_stateid *ls, *n;
+ LIST_HEAD(reaplist);
+
+ spin_lock(&clp->cl_lock);
+ list_for_each_entry_safe(ls, n, &clp->cl_lo_states, ls_perclnt)
+ nfsd4_return_all_layouts(ls, &reaplist);
+ spin_unlock(&clp->cl_lock);
+
+ nfsd4_free_layouts(&reaplist);
+}
+
+void
+nfsd4_return_all_file_layouts(struct nfs4_client *clp, struct nfs4_file *fp)
+{
+ struct nfs4_layout_stateid *ls, *n;
+ LIST_HEAD(reaplist);
+
+ spin_lock(&fp->fi_lock);
+ list_for_each_entry_safe(ls, n, &fp->fi_lo_states, ls_perfile) {
+ if (ls->ls_stid.sc_client == clp)
+ nfsd4_return_all_layouts(ls, &reaplist);
+ }
+ spin_unlock(&fp->fi_lock);
+
+ nfsd4_free_layouts(&reaplist);
+}
+
+int
+nfsd4_init_pnfs(void)
+{
+ int i;
+
+ for (i = 0; i < DEVID_HASH_SIZE; i++)
+ INIT_LIST_HEAD(&nfsd_devid_hash[i]);
+
+ nfs4_layout_cache = kmem_cache_create("nfs4_layout",
+ sizeof(struct nfs4_layout), 0, 0, NULL);
+ if (!nfs4_layout_cache)
+ return -ENOMEM;
+
+ nfs4_layout_stateid_cache = kmem_cache_create("nfs4_layout_stateid",
+ sizeof(struct nfs4_layout_stateid), 0, 0, NULL);
+ if (!nfs4_layout_stateid_cache) {
+ kmem_cache_destroy(nfs4_layout_cache);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+void
+nfsd4_exit_pnfs(void)
+{
+ int i;
+
+ kmem_cache_destroy(nfs4_layout_cache);
+ kmem_cache_destroy(nfs4_layout_stateid_cache);
+
+ for (i = 0; i < DEVID_HASH_SIZE; i++) {
+ struct nfsd4_deviceid_map *map, *n;
+
+ list_for_each_entry_safe(map, n, &nfsd_devid_hash[i], hash)
+ kfree(map);
+ }
+}
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index ac71d13c69ef..2b91443497cc 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -43,6 +43,7 @@
#include "current_stateid.h"
#include "netns.h"
#include "acl.h"
+#include "pnfs.h"
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#include <linux/security.h>
@@ -1178,6 +1179,252 @@ nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return status == nfserr_same ? nfs_ok : status;
}
+#ifdef CONFIG_NFSD_PNFS
+static const struct nfsd4_layout_ops *
+nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
+{
+ if (!exp->ex_layout_type) {
+ dprintk("%s: export does not support pNFS\n", __func__);
+ return NULL;
+ }
+
+ if (exp->ex_layout_type != layout_type) {
+ dprintk("%s: layout type %d not supported\n",
+ __func__, layout_type);
+ return NULL;
+ }
+
+ return nfsd4_layout_ops[layout_type];
+}
+
+static __be32
+nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_getdeviceinfo *gdp)
+{
+ const struct nfsd4_layout_ops *ops;
+ struct nfsd4_deviceid_map *map;
+ struct svc_export *exp;
+ __be32 nfserr;
+
+ dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
+ __func__,
+ gdp->gd_layout_type,
+ gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
+ gdp->gd_maxcount);
+
+ map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
+ if (!map) {
+ dprintk("%s: couldn't find device ID to export mapping!\n",
+ __func__);
+ return nfserr_noent;
+ }
+
+ exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
+ if (IS_ERR(exp)) {
+ dprintk("%s: could not find device id\n", __func__);
+ return nfserr_noent;
+ }
+
+ nfserr = nfserr_layoutunavailable;
+ ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
+ if (!ops)
+ goto out;
+
+ nfserr = nfs_ok;
+ if (gdp->gd_maxcount != 0)
+ nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp);
+
+ gdp->gd_notify_types &= ops->notify_types;
+ exp_put(exp);
+out:
+ return nfserr;
+}
+
+static __be32
+nfsd4_layoutget(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_layoutget *lgp)
+{
+ struct svc_fh *current_fh = &cstate->current_fh;
+ const struct nfsd4_layout_ops *ops;
+ struct nfs4_layout_stateid *ls;
+ __be32 nfserr;
+ int accmode;
+
+ switch (lgp->lg_seg.iomode) {
+ case IOMODE_READ:
+ accmode = NFSD_MAY_READ;
+ break;
+ case IOMODE_RW:
+ accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
+ break;
+ default:
+ dprintk("%s: invalid iomode %d\n",
+ __func__, lgp->lg_seg.iomode);
+ nfserr = nfserr_badiomode;
+ goto out;
+ }
+
+ nfserr = fh_verify(rqstp, current_fh, 0, accmode);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_layoutunavailable;
+ ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
+ if (!ops)
+ goto out;
+
+ /*
+ * Verify minlength and range as per RFC5661:
+ * o If loga_length is less than loga_minlength,
+ * the metadata server MUST return NFS4ERR_INVAL.
+ * o If the sum of loga_offset and loga_minlength exceeds
+ * NFS4_UINT64_MAX, and loga_minlength is not
+ * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
+ * o If the sum of loga_offset and loga_length exceeds
+ * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
+ * the error NFS4ERR_INVAL MUST result.
+ */
+ nfserr = nfserr_inval;
+ if (lgp->lg_seg.length < lgp->lg_minlength ||
+ (lgp->lg_minlength != NFS4_MAX_UINT64 &&
+ lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
+ (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
+ lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
+ goto out;
+ if (lgp->lg_seg.length == 0)
+ goto out;
+
+ nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
+ true, lgp->lg_layout_type, &ls);
+ if (nfserr)
+ goto out;
+
+ nfserr = ops->proc_layoutget(current_fh->fh_dentry->d_inode,
+ current_fh, lgp);
+ if (nfserr)
+ goto out_put_stid;
+
+ nfserr = nfsd4_insert_layout(lgp, ls);
+
+out_put_stid:
+ nfs4_put_stid(&ls->ls_stid);
+out:
+ return nfserr;
+}
+
+static __be32
+nfsd4_layoutcommit(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_layoutcommit *lcp)
+{
+ const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
+ struct svc_fh *current_fh = &cstate->current_fh;
+ const struct nfsd4_layout_ops *ops;
+ loff_t new_size = lcp->lc_last_wr + 1;
+ struct inode *inode;
+ struct nfs4_layout_stateid *ls;
+ __be32 nfserr;
+
+ nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_layoutunavailable;
+ ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
+ if (!ops)
+ goto out;
+ inode = current_fh->fh_dentry->d_inode;
+
+ nfserr = nfserr_inval;
+ if (new_size <= seg->offset) {
+ dprintk("pnfsd: last write before layout segment\n");
+ goto out;
+ }
+ if (new_size > seg->offset + seg->length) {
+ dprintk("pnfsd: last write beyond layout segment\n");
+ goto out;
+ }
+ if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
+ dprintk("pnfsd: layoutcommit beyond EOF\n");
+ goto out;
+ }
+
+ nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
+ false, lcp->lc_layout_type,
+ &ls);
+ if (nfserr) {
+ /* fixup error code as per RFC5661 */
+ if (nfserr == nfserr_bad_stateid)
+ nfserr = nfserr_badlayout;
+ goto out;
+ }
+
+ nfserr = ops->proc_layoutcommit(inode, lcp);
+ if (nfserr)
+ goto out_put_stid;
+
+ if (new_size > i_size_read(inode)) {
+ lcp->lc_size_chg = 1;
+ lcp->lc_newsize = new_size;
+ } else {
+ lcp->lc_size_chg = 0;
+ }
+
+out_put_stid:
+ nfs4_put_stid(&ls->ls_stid);
+out:
+ return nfserr;
+}
+
+static __be32
+nfsd4_layoutreturn(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_layoutreturn *lrp)
+{
+ struct svc_fh *current_fh = &cstate->current_fh;
+ __be32 nfserr;
+
+ nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_layoutunavailable;
+ if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
+ goto out;
+
+ switch (lrp->lr_seg.iomode) {
+ case IOMODE_READ:
+ case IOMODE_RW:
+ case IOMODE_ANY:
+ break;
+ default:
+ dprintk("%s: invalid iomode %d\n", __func__,
+ lrp->lr_seg.iomode);
+ nfserr = nfserr_inval;
+ goto out;
+ }
+
+ switch (lrp->lr_return_type) {
+ case RETURN_FILE:
+ nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
+ break;
+ case RETURN_FSID:
+ case RETURN_ALL:
+ nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
+ break;
+ default:
+ dprintk("%s: invalid return_type %d\n", __func__,
+ lrp->lr_return_type);
+ nfserr = nfserr_inval;
+ break;
+ }
+out:
+ return nfserr;
+}
+#endif /* CONFIG_NFSD_PNFS */
+
/*
* NULL call.
*/
@@ -1679,6 +1926,36 @@ static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd
op_encode_channel_attrs_maxsz) * sizeof(__be32);
}
+#ifdef CONFIG_NFSD_PNFS
+/*
+ * At this stage we don't really know what layout driver will handle the request,
+ * so we need to define an arbitrary upper bound here.
+ */
+#define MAX_LAYOUT_SIZE 128
+static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* logr_return_on_close */ +
+ op_encode_stateid_maxsz +
+ 1 /* nr of layouts */ +
+ MAX_LAYOUT_SIZE) * sizeof(__be32);
+}
+
+static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* locr_newsize */ +
+ 2 /* ns_size */) * sizeof(__be32);
+}
+
+static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* lrs_stateid */ +
+ op_encode_stateid_maxsz) * sizeof(__be32);
+}
+#endif /* CONFIG_NFSD_PNFS */
+
static struct nfsd4_operation nfsd4_ops[] = {
[OP_ACCESS] = {
.op_func = (nfsd4op_func)nfsd4_access,
@@ -1966,6 +2243,31 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
+#ifdef CONFIG_NFSD_PNFS
+ [OP_GETDEVICEINFO] = {
+ .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
+ .op_flags = ALLOWED_WITHOUT_FH,
+ .op_name = "OP_GETDEVICEINFO",
+ },
+ [OP_LAYOUTGET] = {
+ .op_func = (nfsd4op_func)nfsd4_layoutget,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LAYOUTGET",
+ .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
+ },
+ [OP_LAYOUTCOMMIT] = {
+ .op_func = (nfsd4op_func)nfsd4_layoutcommit,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LAYOUTCOMMIT",
+ .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
+ },
+ [OP_LAYOUTRETURN] = {
+ .op_func = (nfsd4op_func)nfsd4_layoutreturn,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LAYOUTRETURN",
+ .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
+ },
+#endif /* CONFIG_NFSD_PNFS */
/* NFSv4.2 operations */
[OP_ALLOCATE] = {
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index eefd29ec43f2..c89f79dc69e2 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -48,6 +48,7 @@
#include "current_stateid.h"
#include "netns.h"
+#include "pnfs.h"
#define NFSDDBG_FACILITY NFSDDBG_PROC
@@ -1539,6 +1540,9 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name)
INIT_LIST_HEAD(&clp->cl_lru);
INIT_LIST_HEAD(&clp->cl_callbacks);
INIT_LIST_HEAD(&clp->cl_revoked);
+#ifdef CONFIG_NFSD_PNFS
+ INIT_LIST_HEAD(&clp->cl_lo_states);
+#endif
spin_lock_init(&clp->cl_lock);
rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
return clp;
@@ -1643,6 +1647,7 @@ __destroy_client(struct nfs4_client *clp)
nfs4_get_stateowner(&oo->oo_owner);
release_openowner(oo);
}
+ nfsd4_return_all_client_layouts(clp);
nfsd4_shutdown_callback(clp);
if (clp->cl_cb_conn.cb_xprt)
svc_xprt_put(clp->cl_cb_conn.cb_xprt);
@@ -2126,8 +2131,11 @@ nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
static void
nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
{
- /* pNFS is not supported */
+#ifdef CONFIG_NFSD_PNFS
+ new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;
+#else
new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
+#endif
/* Referrals are supported, Migration is not. */
new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
@@ -3055,6 +3063,9 @@ static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval,
fp->fi_share_deny = 0;
memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
memset(fp->fi_access, 0, sizeof(fp->fi_access));
+#ifdef CONFIG_NFSD_PNFS
+ INIT_LIST_HEAD(&fp->fi_lo_states);
+#endif
hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
}
@@ -4841,6 +4852,9 @@ 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));
+ nfsd4_return_all_file_layouts(stp->st_stateowner->so_client,
+ stp->st_stid.sc_file);
+
nfsd4_close_open_stateid(stp);
/* put reference from nfs4_preprocess_seqid_op */
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 974533e5a427..df5e66caf100 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -47,6 +47,7 @@
#include "state.h"
#include "cache.h"
#include "netns.h"
+#include "pnfs.h"
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#include <linux/security.h>
@@ -1522,6 +1523,127 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
DECODE_TAIL;
}
+#ifdef CONFIG_NFSD_PNFS
+static __be32
+nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
+ struct nfsd4_getdeviceinfo *gdev)
+{
+ DECODE_HEAD;
+ u32 num, i;
+
+ READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
+ COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
+ gdev->gd_layout_type = be32_to_cpup(p++);
+ gdev->gd_maxcount = be32_to_cpup(p++);
+ num = be32_to_cpup(p++);
+ if (num) {
+ READ_BUF(4 * num);
+ gdev->gd_notify_types = be32_to_cpup(p++);
+ for (i = 1; i < num; i++) {
+ if (be32_to_cpup(p++)) {
+ status = nfserr_inval;
+ goto out;
+ }
+ }
+ }
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
+ struct nfsd4_layoutget *lgp)
+{
+ DECODE_HEAD;
+
+ READ_BUF(36);
+ lgp->lg_signal = be32_to_cpup(p++);
+ lgp->lg_layout_type = be32_to_cpup(p++);
+ lgp->lg_seg.iomode = be32_to_cpup(p++);
+ p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
+ p = xdr_decode_hyper(p, &lgp->lg_seg.length);
+ p = xdr_decode_hyper(p, &lgp->lg_minlength);
+ nfsd4_decode_stateid(argp, &lgp->lg_sid);
+ READ_BUF(4);
+ lgp->lg_maxcount = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
+ struct nfsd4_layoutcommit *lcp)
+{
+ DECODE_HEAD;
+ u32 timechange;
+
+ READ_BUF(20);
+ p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
+ p = xdr_decode_hyper(p, &lcp->lc_seg.length);
+ lcp->lc_reclaim = be32_to_cpup(p++);
+ nfsd4_decode_stateid(argp, &lcp->lc_sid);
+ READ_BUF(4);
+ lcp->lc_newoffset = be32_to_cpup(p++);
+ if (lcp->lc_newoffset) {
+ READ_BUF(8);
+ p = xdr_decode_hyper(p, &lcp->lc_last_wr);
+ } else
+ lcp->lc_last_wr = 0;
+ READ_BUF(4);
+ timechange = be32_to_cpup(p++);
+ if (timechange) {
+ status = nfsd4_decode_time(argp, &lcp->lc_mtime);
+ if (status)
+ return status;
+ } else {
+ lcp->lc_mtime.tv_nsec = UTIME_NOW;
+ }
+ READ_BUF(8);
+ lcp->lc_layout_type = be32_to_cpup(p++);
+
+ /*
+ * Save the layout update in XDR format and let the layout driver deal
+ * with it later.
+ */
+ lcp->lc_up_len = be32_to_cpup(p++);
+ if (lcp->lc_up_len > 0) {
+ READ_BUF(lcp->lc_up_len);
+ READMEM(lcp->lc_up_layout, lcp->lc_up_len);
+ }
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
+ struct nfsd4_layoutreturn *lrp)
+{
+ DECODE_HEAD;
+
+ READ_BUF(16);
+ lrp->lr_reclaim = be32_to_cpup(p++);