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This pull consists mostly of nfsd container work: 

Scott Mayhew revived an old api that communicates with a userspace
 daemon to manage some on-disk state that's used to track clients across
 server reboots.  We've been using a usermode_helper upcall for that, but
 it's tough to run those with the right namespaces, so a daemon is much
 friendlier to container use cases.
 
 Trond fixed nfsd's handling of user credentials in user namespaces.  He
 also contributed patches that allow containers to support different sets
 of NFS protocol versions.
 
 The only remaining container bug I'm aware of is that the NFS reply
 cache is shared between all containers.  If anyone's aware of other gaps
 in our container support, let me know.
 
 The rest of this is miscellaneous bugfixes.
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Merge tag 'nfsd-5.2' of git://linux-nfs.org/~bfields/linux

Pull nfsd updates from Bruce Fields:
 "This consists mostly of nfsd container work:

  Scott Mayhew revived an old api that communicates with a userspace
  daemon to manage some on-disk state that's used to track clients
  across server reboots. We've been using a usermode_helper upcall for
  that, but it's tough to run those with the right namespaces, so a
  daemon is much friendlier to container use cases.

  Trond fixed nfsd's handling of user credentials in user namespaces. He
  also contributed patches that allow containers to support different
  sets of NFS protocol versions.

  The only remaining container bug I'm aware of is that the NFS reply
  cache is shared between all containers. If anyone's aware of other
  gaps in our container support, let me know.

  The rest of this is miscellaneous bugfixes"

* tag 'nfsd-5.2' of git://linux-nfs.org/~bfields/linux: (23 commits)
  nfsd: update callback done processing
  locks: move checks from locks_free_lock() to locks_release_private()
  nfsd: fh_drop_write in nfsd_unlink
  nfsd: allow fh_want_write to be called twice
  nfsd: knfsd must use the container user namespace
  SUNRPC: rsi_parse() should use the current user namespace
  SUNRPC: Fix the server AUTH_UNIX userspace mappings
  lockd: Pass the user cred from knfsd when starting the lockd server
  SUNRPC: Temporary sockets should inherit the cred from their parent
  SUNRPC: Cache the process user cred in the RPC server listener
  nfsd: Allow containers to set supported nfs versions
  nfsd: Add custom rpcbind callbacks for knfsd
  SUNRPC: Allow further customisation of RPC program registration
  SUNRPC: Clean up generic dispatcher code
  SUNRPC: Add a callback to initialise server requests
  SUNRPC/nfs: Fix return value for nfs4_callback_compound()
  nfsd: handle legacy client tracking records sent by nfsdcld
  nfsd: re-order client tracking method selection
  nfsd: keep a tally of RECLAIM_COMPLETE operations when using nfsdcld
  nfsd: un-deprecate nfsdcld
  ...
This commit is contained in:
Linus Torvalds 2019-05-15 18:21:43 -07:00
parent b06ed1e7a2 1c73b9d24f
commit 700a800a94
34 changed files with 1086 additions and 317 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/lockd/clntlock.c
View File

@ -56,7 +56,7 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init)
u32 nlm_version = (nlm_init->nfs_version == 2) ? 1 : 4;
int status;
status = lockd_up(nlm_init->net);
status = lockd_up(nlm_init->net, nlm_init->cred);
if (status < 0)
return ERR_PTR(status);
@ -241,7 +241,7 @@ reclaimer(void *ptr)
allow_signal(SIGKILL);
down_write(&host->h_rwsem);
lockd_up(net); /* note: this cannot fail as lockd is already running */
lockd_up(net, NULL); /* note: this cannot fail as lockd is already running */
dprintk("lockd: reclaiming locks for host %s\n", host->h_name);

33
fs/lockd/svc.c
View File

@ -188,28 +188,31 @@ lockd(void *vrqstp)
static int create_lockd_listener(struct svc_serv *serv, const char *name,
struct net *net, const int family,
const unsigned short port)
const unsigned short port,
const struct cred *cred)
{
struct svc_xprt *xprt;
xprt = svc_find_xprt(serv, name, net, family, 0);
if (xprt == NULL)
return svc_create_xprt(serv, name, net, family, port,
SVC_SOCK_DEFAULTS);
SVC_SOCK_DEFAULTS, cred);
svc_xprt_put(xprt);
return 0;
}
static int create_lockd_family(struct svc_serv *serv, struct net *net,
const int family)
const int family, const struct cred *cred)
{
int err;
err = create_lockd_listener(serv, "udp", net, family, nlm_udpport);
err = create_lockd_listener(serv, "udp", net, family, nlm_udpport,
cred);
if (err < 0)
return err;
return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport);
return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport,
cred);
}
/*
@ -222,16 +225,17 @@ static int create_lockd_family(struct svc_serv *serv, struct net *net,
* Returns zero if all listeners are available; otherwise a
* negative errno value is returned.
*/
static int make_socks(struct svc_serv *serv, struct net *net)
static int make_socks(struct svc_serv *serv, struct net *net,
const struct cred *cred)
{
static int warned;
int err;
err = create_lockd_family(serv, net, PF_INET);
err = create_lockd_family(serv, net, PF_INET, cred);
if (err < 0)
goto out_err;
err = create_lockd_family(serv, net, PF_INET6);
err = create_lockd_family(serv, net, PF_INET6, cred);
if (err < 0 && err != -EAFNOSUPPORT)
goto out_err;
@ -246,7 +250,8 @@ out_err:
return err;
}
static int lockd_up_net(struct svc_serv *serv, struct net *net)
static int lockd_up_net(struct svc_serv *serv, struct net *net,
const struct cred *cred)
{
struct lockd_net *ln = net_generic(net, lockd_net_id);
int error;
@ -258,7 +263,7 @@ static int lockd_up_net(struct svc_serv *serv, struct net *net)
if (error)
goto err_bind;
error = make_socks(serv, net);
error = make_socks(serv, net, cred);
if (error < 0)
goto err_bind;
set_grace_period(net);
@ -461,7 +466,7 @@ static struct svc_serv *lockd_create_svc(void)
/*
* Bring up the lockd process if it's not already up.
*/
int lockd_up(struct net *net)
int lockd_up(struct net *net, const struct cred *cred)
{
struct svc_serv *serv;
int error;
@ -474,7 +479,7 @@ int lockd_up(struct net *net)
goto err_create;
}
error = lockd_up_net(serv, net);
error = lockd_up_net(serv, net, cred);
if (error < 0) {
lockd_unregister_notifiers();
goto err_put;
@ -807,5 +812,7 @@ static struct svc_program nlmsvc_program = {
.pg_name = "lockd", /* service name */
.pg_class = "nfsd", /* share authentication with nfsd */
.pg_stats = &nlmsvc_stats, /* stats table */
.pg_authenticate = &lockd_authenticate /* export authentication */
.pg_authenticate = &lockd_authenticate, /* export authentication */
.pg_init_request = svc_generic_init_request,
.pg_rpcbind_set = svc_generic_rpcbind_set,
};

12
fs/locks.c
View File

@ -352,6 +352,12 @@ EXPORT_SYMBOL_GPL(locks_alloc_lock);
void locks_release_private(struct file_lock *fl)
{
BUG_ON(waitqueue_active(&fl->fl_wait));
BUG_ON(!list_empty(&fl->fl_list));
BUG_ON(!list_empty(&fl->fl_blocked_requests));
BUG_ON(!list_empty(&fl->fl_blocked_member));
BUG_ON(!hlist_unhashed(&fl->fl_link));
if (fl->fl_ops) {
if (fl->fl_ops->fl_release_private)
fl->fl_ops->fl_release_private(fl);
@ -371,12 +377,6 @@ EXPORT_SYMBOL_GPL(locks_release_private);
/* Free a lock which is not in use. */
void locks_free_lock(struct file_lock *fl)
{
BUG_ON(waitqueue_active(&fl->fl_wait));
BUG_ON(!list_empty(&fl->fl_list));
BUG_ON(!list_empty(&fl->fl_blocked_requests));
BUG_ON(!list_empty(&fl->fl_blocked_member));
BUG_ON(!hlist_unhashed(&fl->fl_link));
locks_release_private(fl);
kmem_cache_free(filelock_cache, fl);
}

9
fs/nfs/callback.c
View File

@ -41,11 +41,13 @@ static struct svc_program nfs4_callback_program;
static int nfs4_callback_up_net(struct svc_serv *serv, struct net *net)
{
const struct cred *cred = current_cred();
int ret;
struct nfs_net *nn = net_generic(net, nfs_net_id);
ret = svc_create_xprt(serv, "tcp", net, PF_INET,
nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS);
nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS,
cred);
if (ret <= 0)
goto out_err;
nn->nfs_callback_tcpport = ret;
@ -53,7 +55,8 @@ static int nfs4_callback_up_net(struct svc_serv *serv, struct net *net)
nn->nfs_callback_tcpport, PF_INET, net->ns.inum);
ret = svc_create_xprt(serv, "tcp", net, PF_INET6,
nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS);
nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS,
cred);
if (ret > 0) {
nn->nfs_callback_tcpport6 = ret;
dprintk("NFS: Callback listener port = %u (af %u, net %x)\n",
@ -457,4 +460,6 @@ static struct svc_program nfs4_callback_program = {
.pg_class = "nfs", /* authentication class */
.pg_stats = &nfs4_callback_stats,
.pg_authenticate = nfs_callback_authenticate,
.pg_init_request = svc_generic_init_request,
.pg_rpcbind_set = svc_generic_rpcbind_set,
};

2
fs/nfs/callback_xdr.c
View File

@ -983,7 +983,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp)
out_invalidcred:
pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n");
return rpc_autherr_badcred;
return svc_return_autherr(rqstp, rpc_autherr_badcred);
}
/*

1
fs/nfs/client.c
View File

@ -558,6 +558,7 @@ static int nfs_start_lockd(struct nfs_server *server)
1 : 0,
.net = clp->cl_net,
.nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops,
.cred = current_cred(),
};
if (nlm_init.nfs_version > 3)

18
fs/nfsd/export.c
View File

@ -570,13 +570,13 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
err = get_int(&mesg, &an_int);
if (err)
goto out3;
exp.ex_anon_uid= make_kuid(&init_user_ns, an_int);
exp.ex_anon_uid= make_kuid(current_user_ns(), an_int);
/* anon gid */
err = get_int(&mesg, &an_int);
if (err)
goto out3;
exp.ex_anon_gid= make_kgid(&init_user_ns, an_int);
exp.ex_anon_gid= make_kgid(current_user_ns(), an_int);
/* fsid */
err = get_int(&mesg, &an_int);
@ -1170,15 +1170,17 @@ static void show_secinfo(struct seq_file *m, struct svc_export *exp)
static void exp_flags(struct seq_file *m, int flag, int fsid,
kuid_t anonu, kgid_t anong, struct nfsd4_fs_locations *fsloc)
{
struct user_namespace *userns = m->file->f_cred->user_ns;
show_expflags(m, flag, NFSEXP_ALLFLAGS);
if (flag & NFSEXP_FSID)
seq_printf(m, ",fsid=%d", fsid);
if (!uid_eq(anonu, make_kuid(&init_user_ns, (uid_t)-2)) &&
!uid_eq(anonu, make_kuid(&init_user_ns, 0x10000-2)))
seq_printf(m, ",anonuid=%u", from_kuid(&init_user_ns, anonu));
if (!gid_eq(anong, make_kgid(&init_user_ns, (gid_t)-2)) &&
!gid_eq(anong, make_kgid(&init_user_ns, 0x10000-2)))
seq_printf(m, ",anongid=%u", from_kgid(&init_user_ns, anong));
if (!uid_eq(anonu, make_kuid(userns, (uid_t)-2)) &&
!uid_eq(anonu, make_kuid(userns, 0x10000-2)))
seq_printf(m, ",anonuid=%u", from_kuid_munged(userns, anonu));
if (!gid_eq(anong, make_kgid(userns, (gid_t)-2)) &&
!gid_eq(anong, make_kgid(userns, 0x10000-2)))
seq_printf(m, ",anongid=%u", from_kgid_munged(userns, anong));
if (fsloc && fsloc->locations_count > 0) {
char *loctype = (fsloc->migrated) ? "refer" : "replicas";
int i;

11
fs/nfsd/netns.h
View File

@ -104,6 +104,9 @@ struct nfsd_net {
time_t nfsd4_grace;
bool somebody_reclaimed;
bool track_reclaim_completes;
atomic_t nr_reclaim_complete;
bool nfsd_net_up;
bool lockd_up;
@ -131,10 +134,18 @@ struct nfsd_net {
u32 s2s_cp_cl_id;
struct idr s2s_cp_stateids;
spinlock_t s2s_cp_lock;
/*
* Version information
*/
bool *nfsd_versions;
bool *nfsd4_minorversions;
};
/* Simple check to find out if a given net was properly initialized */
#define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
extern void nfsd_netns_free_versions(struct nfsd_net *nn);
extern unsigned int nfsd_net_id;
#endif /* __NFSD_NETNS_H__ */

21
fs/nfsd/nfs3xdr.c
View File

@ -96,7 +96,7 @@ decode_filename(__be32 *p, char **namp, unsigned int *lenp)
}
static __be32 *
decode_sattr3(__be32 *p, struct iattr *iap)
decode_sattr3(__be32 *p, struct iattr *iap, struct user_namespace *userns)
{
u32 tmp;
@ -107,12 +107,12 @@ decode_sattr3(__be32 *p, struct iattr *iap)
iap->ia_mode = ntohl(*p++);
}
if (*p++) {
iap->ia_uid = make_kuid(&init_user_ns, ntohl(*p++));
iap->ia_uid = make_kuid(userns, ntohl(*p++));
if (uid_valid(iap->ia_uid))
iap->ia_valid |= ATTR_UID;
}
if (*p++) {
iap->ia_gid = make_kgid(&init_user_ns, ntohl(*p++));
iap->ia_gid = make_kgid(userns, ntohl(*p++));
if (gid_valid(iap->ia_gid))
iap->ia_valid |= ATTR_GID;
}
@ -165,12 +165,13 @@ static __be32 *
encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
struct kstat *stat)
{
struct user_namespace *userns = nfsd_user_namespace(rqstp);
struct timespec ts;
*p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
*p++ = htonl((u32) (stat->mode & S_IALLUGO));
*p++ = htonl((u32) stat->nlink);
*p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid));
*p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid));
*p++ = htonl((u32) from_kuid_munged(userns, stat->uid));
*p++ = htonl((u32) from_kgid_munged(userns, stat->gid));
if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
} else {
@ -325,7 +326,7 @@ nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
p = decode_fh(p, &args->fh);
if (!p)
return 0;
p = decode_sattr3(p, &args->attrs);
p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
if ((args->check_guard = ntohl(*p++)) != 0) {
struct timespec time;
@ -455,7 +456,7 @@ nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p)
switch (args->createmode = ntohl(*p++)) {
case NFS3_CREATE_UNCHECKED:
case NFS3_CREATE_GUARDED:
p = decode_sattr3(p, &args->attrs);
p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
break;
case NFS3_CREATE_EXCLUSIVE:
args->verf = p;
@ -476,7 +477,7 @@ nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p)
if (!(p = decode_fh(p, &args->fh)) ||
!(p = decode_filename(p, &args->name, &args->len)))
return 0;
p = decode_sattr3(p, &args->attrs);
p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
return xdr_argsize_check(rqstp, p);
}
@ -491,7 +492,7 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p)
if (!(p = decode_fh(p, &args->ffh)) ||
!(p = decode_filename(p, &args->fname, &args->flen)))
return 0;
p = decode_sattr3(p, &args->attrs);
p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
args->tlen = ntohl(*p++);
@ -519,7 +520,7 @@ nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p)
if (args->ftype == NF3BLK || args->ftype == NF3CHR
|| args->ftype == NF3SOCK || args->ftype == NF3FIFO)
p = decode_sattr3(p, &args->attrs);
p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
args->major = ntohl(*p++);

9
fs/nfsd/nfs4callback.c
View File

@ -1123,10 +1123,11 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
rpc_restart_call_prepare(task);
return;
case 1:
break;
case -1:
/* Network partition? */
nfsd4_mark_cb_down(clp, task->tk_status);
switch (task->tk_status) {
case -EIO:
case -ETIMEDOUT:
nfsd4_mark_cb_down(clp, task->tk_status);
}
break;
default:
BUG();

8
fs/nfsd/nfs4idmap.c
View File

@ -634,7 +634,7 @@ nfsd_map_name_to_uid(struct svc_rqst *rqstp, const char *name, size_t namelen,
return nfserr_inval;
status = do_name_to_id(rqstp, IDMAP_TYPE_USER, name, namelen, &id);
*uid = make_kuid(&init_user_ns, id);
*uid = make_kuid(nfsd_user_namespace(rqstp), id);
if (!uid_valid(*uid))
status = nfserr_badowner;
return status;
@ -651,7 +651,7 @@ nfsd_map_name_to_gid(struct svc_rqst *rqstp, const char *name, size_t namelen,
return nfserr_inval;
status = do_name_to_id(rqstp, IDMAP_TYPE_GROUP, name, namelen, &id);
*gid = make_kgid(&init_user_ns, id);
*gid = make_kgid(nfsd_user_namespace(rqstp), id);
if (!gid_valid(*gid))
status = nfserr_badowner;
return status;
@ -660,13 +660,13 @@ nfsd_map_name_to_gid(struct svc_rqst *rqstp, const char *name, size_t namelen,
__be32 nfsd4_encode_user(struct xdr_stream *xdr, struct svc_rqst *rqstp,
kuid_t uid)
{
u32 id = from_kuid(&init_user_ns, uid);
u32 id = from_kuid_munged(nfsd_user_namespace(rqstp), uid);
return encode_name_from_id(xdr, rqstp, IDMAP_TYPE_USER, id);
}
__be32 nfsd4_encode_group(struct xdr_stream *xdr, struct svc_rqst *rqstp,
kgid_t gid)
{
u32 id = from_kgid(&init_user_ns, gid);
u32 id = from_kgid_munged(nfsd_user_namespace(rqstp), gid);
return encode_name_from_id(xdr, rqstp, IDMAP_TYPE_GROUP, id);
}

2
fs/nfsd/nfs4layouts.c
View File

@ -693,7 +693,7 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task)
ops->fence_client(ls);
else
nfsd4_cb_layout_fail(ls);
return -1;
return 1;
case -NFS4ERR_NOMATCHING_LAYOUT:
trace_nfsd_layout_recall_done(&ls->ls_stid.sc_stateid);
task->tk_status = 0;

3
fs/nfsd/nfs4proc.c
View File

@ -1927,6 +1927,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
struct nfsd4_compound_state *cstate = &resp->cstate;
struct svc_fh *current_fh = &cstate->current_fh;
struct svc_fh *save_fh = &cstate->save_fh;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
__be32 status;
svcxdr_init_encode(rqstp, resp);
@ -1949,7 +1950,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
* According to RFC3010, this takes precedence over all other errors.
*/
status = nfserr_minor_vers_mismatch;
if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
goto out;
status = nfserr_resource;
if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)

436
fs/nfsd/nfs4recover.c
View File

@ -168,13 +168,34 @@ legacy_recdir_name_error(struct nfs4_client *clp, int error)
}
}
static void
__nfsd4_create_reclaim_record_grace(struct nfs4_client *clp,
const char *dname, int len, struct nfsd_net *nn)
{
struct xdr_netobj name;
struct nfs4_client_reclaim *crp;
name.data = kmemdup(dname, len, GFP_KERNEL);
if (!name.data) {
dprintk("%s: failed to allocate memory for name.data!\n",
__func__);
return;
}
name.len = len;
crp = nfs4_client_to_reclaim(name, nn);
if (!crp) {
kfree(name.data);
return;
}
crp->cr_clp = clp;
}
static void
nfsd4_create_clid_dir(struct nfs4_client *clp)
{
const struct cred *original_cred;
char dname[HEXDIR_LEN];
struct dentry *dir, *dentry;
struct nfs4_client_reclaim *crp;
int status;
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
@ -220,11 +241,9 @@ out_put:
out_unlock:
inode_unlock(d_inode(dir));
if (status == 0) {
if (nn->in_grace) {
crp = nfs4_client_to_reclaim(dname, nn);
if (crp)
crp->cr_clp = clp;
}
if (nn->in_grace)
__nfsd4_create_reclaim_record_grace(clp, dname,
HEXDIR_LEN, nn);
vfs_fsync(nn->rec_file, 0);
} else {
printk(KERN_ERR "NFSD: failed to write recovery record"
@ -344,11 +363,30 @@ out_unlock:
return status;
}
static void
__nfsd4_remove_reclaim_record_grace(const char *dname, int len,
struct nfsd_net *nn)
{
struct xdr_netobj name;
struct nfs4_client_reclaim *crp;
name.data = kmemdup(dname, len, GFP_KERNEL);
if (!name.data) {
dprintk("%s: failed to allocate memory for name.data!\n",
__func__);
return;
}
name.len = len;
crp = nfsd4_find_reclaim_client(name, nn);
kfree(name.data);
if (crp)
nfs4_remove_reclaim_record(crp, nn);
}
static void
nfsd4_remove_clid_dir(struct nfs4_client *clp)
{
const struct cred *original_cred;
struct nfs4_client_reclaim *crp;
char dname[HEXDIR_LEN];
int status;
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
@ -373,12 +411,9 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
nfs4_reset_creds(original_cred);
if (status == 0) {
vfs_fsync(nn->rec_file, 0);
if (nn->in_grace) {
/* remove reclaim record */
crp = nfsd4_find_reclaim_client(dname, nn);
if (crp)
nfs4_remove_reclaim_record(crp, nn);
}
if (nn->in_grace)
__nfsd4_remove_reclaim_record_grace(dname,
HEXDIR_LEN, nn);
}
out_drop_write:
mnt_drop_write_file(nn->rec_file);
@ -392,14 +427,31 @@ static int
purge_old(struct dentry *parent, struct dentry *child, struct nfsd_net *nn)
{
int status;
struct xdr_netobj name;
if (nfs4_has_reclaimed_state(child->d_name.name, nn))
if (child->d_name.len != HEXDIR_LEN - 1) {
printk("%s: illegal name %pd in recovery directory\n",
__func__, child);
/* Keep trying; maybe the others are OK: */
return 0;
}
name.data = kmemdup_nul(child->d_name.name, child->d_name.len, GFP_KERNEL);
if (!name.data) {
dprintk("%s: failed to allocate memory for name.data!\n",
__func__);
goto out;
}
name.len = HEXDIR_LEN;
if (nfs4_has_reclaimed_state(name, nn))
goto out_free;
status = vfs_rmdir(d_inode(parent), child);
if (status)
printk("failed to remove client recovery directory %pd\n",
child);
out_free:
kfree(name.data);
out:
/* Keep trying, success or failure: */
return 0;
}
@ -429,13 +481,24 @@ out:
static int
load_recdir(struct dentry *parent, struct dentry *child, struct nfsd_net *nn)
{
struct xdr_netobj name;
if (child->d_name.len != HEXDIR_LEN - 1) {
printk("nfsd4: illegal name %pd in recovery directory\n",
child);
printk("%s: illegal name %pd in recovery directory\n",
__func__, child);
/* Keep trying; maybe the others are OK: */
return 0;
}
nfs4_client_to_reclaim(child->d_name.name, nn);
name.data = kmemdup_nul(child->d_name.name, child->d_name.len, GFP_KERNEL);
if (!name.data) {
dprintk("%s: failed to allocate memory for name.data!\n",
__func__);
goto out;
}
name.len = HEXDIR_LEN;
if (!nfs4_client_to_reclaim(name, nn))
kfree(name.data);
out:
return 0;
}
@ -564,6 +627,7 @@ nfsd4_legacy_tracking_init(struct net *net)
status = nfsd4_load_reboot_recovery_data(net);
if (status)
goto err;
printk("NFSD: Using legacy client tracking operations.\n");
return 0;
err:
@ -615,6 +679,7 @@ nfsd4_check_legacy_client(struct nfs4_client *clp)
char dname[HEXDIR_LEN];
struct nfs4_client_reclaim *crp;
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
struct xdr_netobj name;
/* did we already find that this client is stable? */
if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
@ -627,13 +692,22 @@ nfsd4_check_legacy_client(struct nfs4_client *clp)
}
/* look for it in the reclaim hashtable otherwise */
crp = nfsd4_find_reclaim_client(dname, nn);
name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL);
if (!name.data) {
dprintk("%s: failed to allocate memory for name.data!\n",
__func__);
goto out_enoent;
}
name.len = HEXDIR_LEN;
crp = nfsd4_find_reclaim_client(name, nn);
kfree(name.data);
if (crp) {
set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
crp->cr_clp = clp;
return 0;
}
out_enoent:
return -ENOENT;
}
@ -656,6 +730,7 @@ struct cld_net {
spinlock_t cn_lock;
struct list_head cn_list;
unsigned int cn_xid;
bool cn_has_legacy;
};
struct cld_upcall {
@ -705,6 +780,40 @@ cld_pipe_upcall(struct rpc_pipe *pipe, struct cld_msg *cmsg)
return ret;
}
static ssize_t
__cld_pipe_inprogress_downcall(const struct cld_msg __user *cmsg,
struct nfsd_net *nn)
{
uint8_t cmd;
struct xdr_netobj name;
uint16_t namelen;
struct cld_net *cn = nn->cld_net;
if (get_user(cmd, &cmsg->cm_cmd)) {
dprintk("%s: error when copying cmd from userspace", __func__);
return -EFAULT;
}
if (cmd == Cld_GraceStart) {
if (get_user(namelen, &cmsg->cm_u.cm_name.cn_len))
return -EFAULT;
name.data = memdup_user(&cmsg->cm_u.cm_name.cn_id, namelen);
if (IS_ERR_OR_NULL(name.data))
return -EFAULT;
name.len = namelen;
if (name.len > 5 && memcmp(name.data, "hash:", 5) == 0) {
name.len = name.len - 5;
memmove(name.data, name.data + 5, name.len);
cn->cn_has_legacy = true;
}
if (!nfs4_client_to_reclaim(name, nn)) {
kfree(name.data);
return -EFAULT;
}
return sizeof(*cmsg);
}
return -EFAULT;
}
static ssize_t
cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
{
@ -714,6 +823,7 @@ cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
struct nfsd_net *nn = net_generic(file_inode(filp)->i_sb->s_fs_info,
nfsd_net_id);
struct cld_net *cn = nn->cld_net;
int16_t status;
if (mlen != sizeof(*cmsg)) {
dprintk("%s: got %zu bytes, expected %zu\n", __func__, mlen,
@ -727,13 +837,24 @@ cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
return -EFAULT;
}
/*
* copy the status so we know whether to remove the upcall from the
* list (for -EINPROGRESS, we just want to make sure the xid is
* valid, not remove the upcall from the list)
*/
if (get_user(status, &cmsg->cm_status)) {
dprintk("%s: error when copying status from userspace", __func__);
return -EFAULT;
}
/* walk the list and find corresponding xid */
cup = NULL;
spin_lock(&cn->cn_lock);
list_for_each_entry(tmp, &cn->cn_list, cu_list) {
if (get_unaligned(&tmp->cu_msg.cm_xid) == xid) {
cup = tmp;
list_del_init(&cup->cu_list);
if (status != -EINPROGRESS)
list_del_init(&cup->cu_list);
break;
}
}
@ -745,6 +866,9 @@ cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
return -EINVAL;
}
if (status == -EINPROGRESS)
return __cld_pipe_inprogress_downcall(cmsg, nn);
if (copy_from_user(&cup->cu_msg, src, mlen) != 0)
return -EFAULT;
@ -820,7 +944,7 @@ nfsd4_cld_unregister_net(struct net *net, struct rpc_pipe *pipe)
/* Initialize rpc_pipefs pipe for communication with client tracking daemon */
static int
nfsd4_init_cld_pipe(struct net *net)
__nfsd4_init_cld_pipe(struct net *net)
{
int ret;
struct dentry *dentry;
@ -851,6 +975,7 @@ nfsd4_init_cld_pipe(struct net *net)
}
cn->cn_pipe->dentry = dentry;
cn->cn_has_legacy = false;
nn->cld_net = cn;
return 0;
@ -863,6 +988,17 @@ err:
return ret;
}
static int
nfsd4_init_cld_pipe(struct net *net)
{
int status;
status = __nfsd4_init_cld_pipe(net);
if (!status)
printk("NFSD: Using old nfsdcld client tracking operations.\n");
return status;
}
static void
nfsd4_remove_cld_pipe(struct net *net)
{
@ -991,9 +1127,14 @@ out_err:
"record from stable storage: %d\n", ret);
}
/* Check for presence of a record, and update its timestamp */
/*
* For older nfsdcld's that do not allow us to "slurp" the clients
* from the tracking database during startup.
*
* Check for presence of a record, and update its timestamp
*/
static int
nfsd4_cld_check(struct nfs4_client *clp)
nfsd4_cld_check_v0(struct nfs4_client *clp)
{
int ret;
struct cld_upcall *cup;
@ -1026,8 +1167,84 @@ nfsd4_cld_check(struct nfs4_client *clp)
return ret;
}
/*
* For newer nfsdcld's that allow us to "slurp" the clients
* from the tracking database during startup.
*
* Check for presence of a record in the reclaim_str_hashtbl
*/
static int
nfsd4_cld_check(struct nfs4_client *clp)
{
struct nfs4_client_reclaim *crp;
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
struct cld_net *cn = nn->cld_net;
int status;
char dname[HEXDIR_LEN];
struct xdr_netobj name;
/* did we already find that this client is stable? */
if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
return 0;
/* look for it in the reclaim hashtable otherwise */
crp = nfsd4_find_reclaim_client(clp->cl_name, nn);
if (crp)
goto found;
if (cn->cn_has_legacy) {
status = nfs4_make_rec_clidname(dname, &clp->cl_name);
if (status)
return -ENOENT;
name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL);
if (!name.data) {
dprintk("%s: failed to allocate memory for name.data!\n",
__func__);
return -ENOENT;
}
name.len = HEXDIR_LEN;
crp = nfsd4_find_reclaim_client(name, nn);
kfree(name.data);
if (crp)
goto found;
}
return -ENOENT;
found:
crp->cr_clp = clp;
return 0;
}
static int
nfsd4_cld_grace_start(struct nfsd_net *nn)
{
int ret;
struct cld_upcall *cup;
struct cld_net *cn = nn->cld_net;
cup = alloc_cld_upcall(cn);
if (!cup) {
ret = -ENOMEM;
goto out_err;
}
cup->cu_msg.cm_cmd = Cld_GraceStart;
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_msg);
if (!ret)
ret = cup->cu_msg.cm_status;
free_cld_upcall(cup);
out_err:
if (ret)
dprintk("%s: Unable to get clients from userspace: %d\n",
__func__, ret);
return ret;
}
/* For older nfsdcld's that need cm_gracetime */
static void
nfsd4_cld_grace_done(struct nfsd_net *nn)
nfsd4_cld_grace_done_v0(struct nfsd_net *nn)
{
int ret;
struct cld_upcall *cup;
@ -1051,11 +1268,149 @@ out_err:
printk(KERN_ERR "NFSD: Unable to end grace period: %d\n", ret);
}
static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops = {
/*
* For newer nfsdcld's that do not need cm_gracetime. We also need to call
* nfs4_release_reclaim() to clear out the reclaim_str_hashtbl.
*/
static void
nfsd4_cld_grace_done(struct nfsd_net *nn)
{
int ret;
struct cld_upcall *cup;
struct cld_net *cn = nn->cld_net;
cup = alloc_cld_upcall(cn);
if (!cup) {
ret = -ENOMEM;
goto out_err;
}
cup->cu_msg.cm_cmd = Cld_GraceDone;
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_msg);
if (!ret)
ret = cup->cu_msg.cm_status;
free_cld_upcall(cup);
out_err:
nfs4_release_reclaim(nn);
if (ret)
printk(KERN_ERR "NFSD: Unable to end grace period: %d\n", ret);
}
static int
nfs4_cld_state_init(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
int i;
nn->reclaim_str_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,
sizeof(struct list_head),
GFP_KERNEL);
if (!nn->reclaim_str_hashtbl)
return -ENOMEM;
for (i = 0; i < CLIENT_HASH_SIZE; i++)
INIT_LIST_HEAD(&nn->reclaim_str_hashtbl[i]);
nn->reclaim_str_hashtbl_size = 0;
nn->track_reclaim_completes = true;
atomic_set(&nn->nr_reclaim_complete, 0);
return 0;
}
static void
nfs4_cld_state_shutdown(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
nn->track_reclaim_completes = false;
kfree(nn->reclaim_str_hashtbl);
}
static bool
cld_running(struct nfsd_net *nn)
{
struct cld_net *cn = nn->cld_net;
struct rpc_pipe *pipe = cn->cn_pipe;
return pipe->nreaders || pipe->nwriters;
}
static int
nfsd4_cld_tracking_init(struct net *net)
{
int status;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
bool running;
int retries = 10;
status = nfs4_cld_state_init(net);
if (status)
return status;
status = __nfsd4_init_cld_pipe(net);
if (status)
goto err_shutdown;
/*
* rpc pipe upcalls take 30 seconds to time out, so we don't want to
* queue an upcall unless we know that nfsdcld is running (because we
* want this to fail fast so that nfsd4_client_tracking_init() can try
* the next client tracking method). nfsdcld should already be running
* before nfsd is started, so the wait here is for nfsdcld to open the
* pipefs file we just created.
*/
while (!(running = cld_running(nn)) && retries--)
msleep(100);
if (!running) {
status = -ETIMEDOUT;
goto err_remove;
}
status = nfsd4_cld_grace_start(nn);
if (status) {
if (status == -EOPNOTSUPP)
printk(KERN_WARNING "NFSD: Please upgrade nfsdcld.\n");
nfs4_release_reclaim(nn);
goto err_remove;
} else
printk("NFSD: Using nfsdcld client tracking operations.\n");
return 0;
err_remove:
nfsd4_remove_cld_pipe(net);
err_shutdown:
nfs4_cld_state_shutdown(net);
return status;
}
static void
nfsd4_cld_tracking_exit(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
nfs4_release_reclaim(nn);
nfsd4_remove_cld_pipe(net);
nfs4_cld_state_shutdown(net);
}
/* For older nfsdcld's */
static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v0 = {
.init = nfsd4_init_cld_pipe,
.exit = nfsd4_remove_cld_pipe,
.create = nfsd4_cld_create,
.remove = nfsd4_cld_remove,
.check = nfsd4_cld_check_v0,
.grace_done = nfsd4_cld_grace_done_v0,
};
/* For newer nfsdcld's */
static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops = {
.init = nfsd4_cld_tracking_init,
.exit = nfsd4_cld_tracking_exit,
.create = nfsd4_cld_create,
.remove = nfsd4_cld_remove,
.check = nfsd4_cld_check,
.grace_done = nfsd4_cld_grace_done,
};
@ -1267,6 +1622,8 @@ nfsd4_umh_cltrack_init(struct net *net)
ret = nfsd4_umh_cltrack_upcall("init", NULL, grace_start, NULL);
kfree(grace_start);
if (!ret)
printk("NFSD: Using UMH upcall client tracking operations.\n");
return ret;
}
@ -1416,9 +1773,20 @@ nfsd4_client_tracking_init(struct net *net)
if (nn->client_tracking_ops)
goto do_init;
/* First, try to use nfsdcld */
nn->client_tracking_ops = &nfsd4_cld_tracking_ops;
status = nn->client_tracking_ops->init(net);
if (!status)
return status;
if (status != -ETIMEDOUT) {
nn->client_tracking_ops = &nfsd4_cld_tracking_ops_v0;
status = nn->client_tracking_ops->init(net);
if (!status)
return status;
}
/*
* First, try a UMH upcall. It should succeed or fail quickly, so
* there's little harm in trying that first.
* Next, try the UMH upcall.
*/
nn->client_tracking_ops = &nfsd4_umh_tracking_ops;
status = nn->client_tracking_ops->init(net);
@ -1426,25 +1794,23 @@ nfsd4_client_tracking_init(struct net *net)
return status;
/*
* See if the recoverydir exists and is a directory. If it is,
* then use the legacy ops.
* Finally, See if the recoverydir exists and is a directory.
* If it is, then use the legacy ops.
*/
nn->client_tracking_ops = &nfsd4_legacy_tracking_ops;
status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path);
if (!status) {
status = d_is_dir(path.dentry);
path_put(&path);
if (status)
goto do_init;
if (!status) {
status = -EINVAL;
goto out;
}
}
/* Finally, try to use nfsdcld */
nn->client_tracking_ops = &nfsd4_cld_tracking_ops;
printk(KERN_WARNING "NFSD: the nfsdcld client tracking upcall will be "
"removed in 3.10. Please transition to using "
"nfsdcltrack.\n");
do_init:
status = nn->client_tracking_ops->init(net);
out:
if (status) {
printk(KERN_WARNING "NFSD: Unable to initialize client "
"recovery tracking! (%d)\n", status);

68
fs/nfsd/nfs4state.c
View File

@ -77,6 +77,7 @@ static u64 current_sessionid = 1;
/* forward declarations */
static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
void nfsd4_end_grace(struct nfsd_net *nn);
/* Locking: */
@ -1067,9 +1068,9 @@ static unsigned int clientid_hashval(u32 id)
return id & CLIENT_HASH_MASK;
}
static unsigned int clientstr_hashval(const char *name)
static unsigned int clientstr_hashval(struct xdr_netobj name)
{
return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK;
}
/*
@ -1997,6 +1998,22 @@ destroy_client(struct nfs4_client *clp)
__destroy_client(clp);
}
static void inc_reclaim_complete(struct nfs4_client *clp)
{
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
if (!nn->track_reclaim_completes)
return;
if (!nfsd4_find_reclaim_client(clp->cl_name, nn))
return;
if (atomic_inc_return(&nn->nr_reclaim_complete) ==
nn->reclaim_str_hashtbl_size) {
printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n",
clp->net->ns.inum);
nfsd4_end_grace(nn);
}
}
static void expire_client(struct nfs4_client *clp)
{
unhash_client(clp);
@ -2048,11 +2065,6 @@ compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
return memcmp(o1->data, o2->data, o1->len);
}
static int same_name(const char *n1, const char *n2)
{
return 0 == memcmp(n1, n2, HEXDIR_LEN);
}
static int
same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
{
@ -3354,6 +3366,7 @@ nfsd4_reclaim_complete(struct svc_rqst *rqstp,
status = nfs_ok;
nfsd4_client_record_create(cstate->session->se_client);
inc_reclaim_complete(cstate->session->se_client);
out:
return status;
}
@ -3958,6 +3971,9 @@ static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
switch (task->tk_status) {
case 0:
return 1;
case -NFS4ERR_DELAY:
rpc_delay(task, 2 * HZ);
return 0;
case -EBADHANDLE:
case -NFS4ERR_BAD_STATEID:
/*
@ -3970,7 +3986,7 @@ static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
}
/*FALLTHRU*/
default:
return -1;
return 1;
}
}
@ -4713,7 +4729,6 @@ nfsd4_end_grace(struct nfsd_net *nn)
if (nn->grace_ended)
return;
dprintk("NFSD: end of grace period\n");
nn->grace_ended = true;
/*
* If the server goes down again right now, an NFSv4
@ -4749,6 +4764,10 @@ static bool clients_still_reclaiming(struct nfsd_net *nn)
unsigned long double_grace_period_end = nn->boot_time +
2 * nn->nfsd4_lease;
if (nn->track_reclaim_completes &&
atomic_read(&nn->nr_reclaim_complete) ==
nn->reclaim_str_hashtbl_size)
return false;
if (!nn->somebody_reclaimed)
return false;
nn->somebody_reclaimed = false;
@ -4779,6 +4798,7 @@ nfs4_laundromat(struct nfsd_net *nn)
new_timeo = 0;
goto out;
}
dprintk("NFSD: end of grace period\n");
nfsd4_end_grace(nn);
INIT_LIST_HEAD(&reaplist);
spin_lock(&nn->client_lock);
@ -6458,7 +6478,7 @@ alloc_reclaim(void)
}
bool
nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn)
{
struct nfs4_client_reclaim *crp;
@ -6468,20 +6488,24 @@ nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
/*
* failure => all reset bets are off, nfserr_no_grace...
*
* The caller is responsible for freeing name.data if NULL is returned (it
* will be freed in nfs4_remove_reclaim_record in the normal case).
*/
struct nfs4_client_reclaim *
nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
nfs4_client_to_reclaim(struct xdr_netobj name, struct nfsd_net *nn)
{
unsigned int strhashval;
struct nfs4_client_reclaim *crp;
dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", name.len, name.data);
crp = alloc_reclaim();
if (crp) {
strhashval = clientstr_hashval(name);
INIT_LIST_HEAD(&crp->cr_strhash);
list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
memcpy(crp->cr_recdir, name, HEXDIR_LEN);
crp->cr_name.data = name.data;
crp->cr_name.len = name.len;
crp->cr_clp = NULL;
nn->reclaim_str_hashtbl_size++;
}
@ -6492,6 +6516,7 @@ void
nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
{
list_del(&crp->cr_strhash);
kfree(crp->cr_name.data);
kfree(crp);
nn->reclaim_str_hashtbl_size--;
}
@ -6515,16 +6540,16 @@ nfs4_release_reclaim(struct nfsd_net *nn)
/*
* called from OPEN, CLAIM_PREVIOUS with a new clientid. */
struct nfs4_client_reclaim *
nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn)
{
unsigned int strhashval;
struct nfs4_client_reclaim *crp = NULL;
dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
dprintk("NFSD: nfs4_find_reclaim_client for name %.*s\n", name.len, name.data);
strhashval = clientstr_hashval(recdir);
strhashval = clientstr_hashval(name);
list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
if (same_name(crp->cr_recdir, recdir)) {
if (compare_blob(&crp->cr_name, &name) == 0) {
return crp;
}
}
@ -7262,10 +7287,19 @@ nfs4_state_start_net(struct net *net)
return ret;
locks_start_grace(net, &nn->nfsd4_manager);
nfsd4_client_tracking_init(net);
if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0)
goto skip_grace;
printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n",
nn->nfsd4_grace, net->ns.inum);
queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
return 0;
skip_grace:
printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n",
net->ns.inum);
queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ);
nfsd4_end_grace(nn);
return 0;
}
/* initialization to perform when the nfsd service is started: */

9
fs/nfsd/nfs4xdr.c
View File

@ -521,6 +521,7 @@ nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access
static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
{
DECODE_HEAD;
struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
u32 dummy, uid, gid;
char *machine_name;
int i;
@ -563,8 +564,8 @@ static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_
dummy = be32_to_cpup(p++);
READ_BUF(dummy * 4);
if (cbs->flavor == (u32)(-1)) {
kuid_t kuid = make_kuid(&init_user_ns, uid);
kgid_t kgid = make_kgid(&init_user_ns, gid);
kuid_t kuid = make_kuid(userns, uid);
kgid_t kgid = make_kgid(userns, gid);
if (uid_valid(kuid) && gid_valid(kgid)) {
cbs->uid = kuid;
cbs->gid = kgid;
@ -2420,8 +2421,10 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
__be32 status;
int err;
struct nfs4_acl *acl = NULL;
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
void *context = NULL;
int contextlen;
#endif
bool contextsupport = false;
struct nfsd4_compoundres *resp = rqstp->rq_resp;
u32 minorversion = resp->cstate.minorversion;
@ -2906,12 +2909,14 @@ out_acl:
*p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
}
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
status = nfsd4_encode_security_label(xdr, rqstp, context,
contextlen);
if (status)
goto out;
}
#endif
attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);

42
fs/nfsd/nfsctl.c
View File

@ -439,7 +439,7 @@ static ssize_t write_threads(struct file *file, char *buf, size_t size)
return rv;
if (newthreads < 0)
return -EINVAL;
rv = nfsd_svc(newthreads, net);
rv = nfsd_svc(newthreads, net, file->f_cred);
if (rv < 0)
return rv;
} else
@ -537,14 +537,14 @@ out_free:
}
static ssize_t
nfsd_print_version_support(char *buf, int remaining, const char *sep,
unsigned vers, int minor)
nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining,
const char *sep, unsigned vers, int minor)
{
const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u";
bool supported = !!nfsd_vers(vers, NFSD_TEST);
bool supported = !!nfsd_vers(nn, vers, NFSD_TEST);
if (vers == 4 && minor >= 0 &&
!nfsd_minorversion(minor, NFSD_TEST))
!nfsd_minorversion(nn, minor, NFSD_TEST))
supported = false;
if (minor == 0 && supported)
/*
@ -599,20 +599,20 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
switch(num) {
case 2:
case 3:
nfsd_vers(num, cmd);
nfsd_vers(nn, num, cmd);
break;
case 4:
if (*minorp == '.') {
if (nfsd_minorversion(minor, cmd) < 0)
if (nfsd_minorversion(nn, minor, cmd) < 0)
return -EINVAL;
} else if ((cmd == NFSD_SET) != nfsd_vers(num, NFSD_TEST)) {
} else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) {
/*
* Either we have +4 and no minors are enabled,
* or we have -4 and at least one minor is enabled.
* In either case, propagate 'cmd' to all minors.
*/
minor = 0;
while (nfsd_minorversion(minor, cmd) >= 0)
while (nfsd_minorversion(nn, minor, cmd) >= 0)
minor++;
}
break;
@ -624,7 +624,7 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
/* If all get turned off, turn them back on, as
* having no versions is BAD
*/
nfsd_reset_versions();
nfsd_reset_versions(nn);
}
/* Now write current state into reply buffer */
@ -633,12 +633,12 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
remaining = SIMPLE_TRANSACTION_LIMIT;
for (num=2 ; num <= 4 ; num++) {
int minor;
if (!nfsd_vers(num, NFSD_AVAIL))
if (!nfsd_vers(nn, num, NFSD_AVAIL))
continue;
minor = -1;
do {
len = nfsd_print_version_support(buf, remaining,
len = nfsd_print_version_support(nn, buf, remaining,
sep, num, minor);
if (len >= remaining)
goto out;
@ -717,7 +717,7 @@ static ssize_t __write_ports_names(char *buf, struct net *net)
* a socket of a supported family/protocol, and we use it as an
* nfsd listener.
*/
static ssize_t __write_ports_addfd(char *buf, struct net *net)
static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred)
{
char *mesg = buf;
int fd, err;
@ -736,7 +736,7 @@ static ssize_t __write_ports_addfd(char *buf, struct net *net)
if (err != 0)
return err;
err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred);
if (err < 0) {
nfsd_destroy(net);
return err;
@ -751,7 +751,7 @@ static ssize_t __write_ports_addfd(char *buf, struct net *net)
* A transport listener is added by writing it's transport name and
* a port number.
*/
static ssize_t __write_ports_addxprt(char *buf, struct net *net)
static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred)
{
char transport[16];
struct svc_xprt *xprt;
@ -769,12 +769,12 @@ static ssize_t __write_ports_addxprt(char *buf, struct net *net)
return err;
err = svc_create_xprt(nn->nfsd_serv, transport, net,
PF_INET, port, SVC_SOCK_ANONYMOUS);
PF_INET, port, SVC_SOCK_ANONYMOUS, cred);
if (err < 0)
goto out_err;
err = svc_create_xprt(nn->nfsd_serv, transport, net,
PF_INET6, port, SVC_SOCK_ANONYMOUS);
PF_INET6, port, SVC_SOCK_ANONYMOUS, cred);
if (err < 0 && err != -EAFNOSUPPORT)
goto out_close;
@ -799,10 +799,10 @@ static ssize_t __write_ports(struct file *file, char *buf, size_t size,
return __write_ports_names(buf, net);
if (isdigit(buf[0]))
return __write_ports_addfd(buf, net);
return __write_ports_addfd(buf, net, file->f_cred);
if (isalpha(buf[0]))
return __write_ports_addxprt(buf, net);
return __write_ports_addxprt(buf, net, file->f_cred);
return -EINVAL;
}
@ -1239,9 +1239,12 @@ static __net_init int nfsd_init_net(struct net *net)
retval = nfsd_idmap_init(net);
if (retval)
goto out_idmap_error;
nn->nfsd_versions = NULL;
nn->nfsd4_minorversions = NULL;
nn->nfsd4_lease = 90; /* default lease time */
nn->nfsd4_grace = 90;
nn->somebody_reclaimed = false;
nn->track_reclaim_completes = false;
nn->clverifier_counter = prandom_u32();
nn->clientid_counter = prandom_u32();
nn->s2s_cp_cl_id = nn->clientid_counter++;
@ -1260,6 +1263,7 @@ static __net_exit void nfsd_exit_net(struct net *net)
{
nfsd_idmap_shutdown(net);
nfsd_export_shutdown(net);
nfsd_netns_free_versions(net_generic(net, nfsd_net_id));
}
static struct pernet_operations nfsd_net_ops = {

17
fs/nfsd/nfsd.h
View File

@ -17,6 +17,7 @@
#include <linux/nfs3.h>
#include <linux/nfs4.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svc_xprt.h>
#include <linux/sunrpc/msg_prot.h>
#include <uapi/linux/nfsd/debug.h>
@ -73,7 +74,7 @@ extern const struct seq_operations nfs_exports_op;
/*
* Function prototypes.
*/
int nfsd_svc(int nrservs, struct net *net);
int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
int nfsd_nrthreads(struct net *);
@ -98,10 +99,12 @@ extern const struct svc_version nfsd_acl_version3;
#endif
#endif
struct nfsd_net;
enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
int nfsd_vers(int vers, enum vers_op change);
int nfsd_minorversion(u32 minorversion, enum vers_op change);
void nfsd_reset_versions(void);
int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
void nfsd_reset_versions(struct nfsd_net *nn);
int nfsd_create_serv(struct net *net);
extern int nfsd_max_blksize;
@ -110,6 +113,12 @@ static inline int nfsd_v4client(struct svc_rqst *rq)
{
return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
}
static inline struct user_namespace *
nfsd_user_namespace(const struct svc_rqst *rqstp)
{
const struct cred *cred = rqstp->rq_xprt->xpt_cred;
return cred ? cred->user_ns : &init_user_ns;
}
/*
* NFSv4 State

271
fs/nfsd/nfssvc.c
View File

@ -32,6 +32,24 @@
extern struct svc_program nfsd_program;
static int nfsd(void *vrqstp);
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
static int nfsd_acl_rpcbind_set(struct net *,
const struct svc_program *,
u32, int,
unsigned short,
unsigned short);
static __be32 nfsd_acl_init_request(struct svc_rqst *,
const struct svc_program *,
struct svc_process_info *);
#endif
static int nfsd_rpcbind_set(struct net *,
const struct svc_program *,
u32, int,
unsigned short,
unsigned short);
static __be32 nfsd_init_request(struct svc_rqst *,
const struct svc_program *,
struct svc_process_info *);
/*
* nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members
@ -86,6 +104,8 @@ static struct svc_program nfsd_acl_program = {
.pg_class = "nfsd",
.pg_stats = &nfsd_acl_svcstats,
.pg_authenticate = &svc_set_client,
.pg_init_request = nfsd_acl_init_request,
.pg_rpcbind_set = nfsd_acl_rpcbind_set,
};
static struct svc_stat nfsd_acl_svcstats = {
@ -105,7 +125,6 @@ static const struct svc_version *nfsd_version[] = {
#define NFSD_MINVERS 2
#define NFSD_NRVERS ARRAY_SIZE(nfsd_version)
static const struct svc_version *nfsd_versions[NFSD_NRVERS];
struct svc_program nfsd_program = {
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
@ -113,77 +132,136 @@ struct svc_program nfsd_program = {
#endif
.pg_prog = NFS_PROGRAM, /* program number */
.pg_nvers = NFSD_NRVERS, /* nr of entries in nfsd_version */
.pg_vers = nfsd_versions, /* version table */
.pg_vers = nfsd_version, /* version table */
.pg_name = "nfsd", /* program name */
.pg_class = "nfsd", /* authentication class */
.pg_stats = &nfsd_svcstats, /* version table */
.pg_authenticate = &svc_set_client, /* export authentication */
.pg_init_request = nfsd_init_request,
.pg_rpcbind_set = nfsd_rpcbind_set,
};
static bool nfsd_supported_minorversions[NFSD_SUPPORTED_MINOR_VERSION + 1] = {
[0] = 1,
[1] = 1,
[2] = 1,
};
static bool
nfsd_support_version(int vers)
{
if (vers >= NFSD_MINVERS && vers < NFSD_NRVERS)
return nfsd_version[vers] != NULL;
return false;
}
int nfsd_vers(int vers, enum vers_op change)
static bool *
nfsd_alloc_versions(void)
{
bool *vers = kmalloc_array(NFSD_NRVERS, sizeof(bool), GFP_KERNEL);
unsigned i;
if (vers) {
/* All compiled versions are enabled by default */
for (i = 0; i < NFSD_NRVERS; i++)
vers[i] = nfsd_support_version(i);
}
return vers;
}
static bool *
nfsd_alloc_minorversions(void)
{
bool *vers = kmalloc_array(NFSD_SUPPORTED_MINOR_VERSION + 1,
sizeof(bool), GFP_KERNEL);
unsigned i;
if (vers) {
/* All minor versions are enabled by default */
for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++)
vers[i] = nfsd_support_version(4);
}
return vers;
}
void
nfsd_netns_free_versions(struct nfsd_net *nn)
{
kfree(nn->nfsd_versions);
kfree(nn->nfsd4_minorversions);
nn->nfsd_versions = NULL;
nn->nfsd4_minorversions = NULL;
}
static void
nfsd_netns_init_versions(struct nfsd_net *nn)
{
if (!nn->nfsd_versions) {
nn->nfsd_versions = nfsd_alloc_versions();
nn->nfsd4_minorversions = nfsd_alloc_minorversions();
if (!nn->nfsd_versions || !nn->nfsd4_minorversions)
nfsd_netns_free_versions(nn);
}
}
int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change)
{
if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
return 0;
switch(change) {
case NFSD_SET:
nfsd_versions[vers] = nfsd_version[vers];
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
if (vers < NFSD_ACL_NRVERS)
nfsd_acl_versions[vers] = nfsd_acl_version[vers];
#endif
if (nn->nfsd_versions)
nn->nfsd_versions[vers] = nfsd_support_version(vers);
break;
case NFSD_CLEAR:
nfsd_versions[vers] = NULL;
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
if (vers < NFSD_ACL_NRVERS)
nfsd_acl_versions[vers] = NULL;
#endif
nfsd_netns_init_versions(nn);
if (nn->nfsd_versions)
nn->nfsd_versions[vers] = false;
break;
case NFSD_TEST:
return nfsd_versions[vers] != NULL;
if (nn->nfsd_versions)
return nn->nfsd_versions[vers];
/* Fallthrough */
case NFSD_AVAIL:
return nfsd_version[vers] != NULL;
return nfsd_support_version(vers);
}
return 0;
}
static void
nfsd_adjust_nfsd_versions4(void)
nfsd_adjust_nfsd_versions4(struct nfsd_net *nn)
{
unsigned i;
for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++) {
if (nfsd_supported_minorversions[i])
if (nn->nfsd4_minorversions[i])
return;
}
nfsd_vers(4, NFSD_CLEAR);
nfsd_vers(nn, 4, NFSD_CLEAR);
}
int nfsd_minorversion(u32 minorversion, enum vers_op change)
int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change)
{
if (minorversion > NFSD_SUPPORTED_MINOR_VERSION &&
change != NFSD_AVAIL)
return -1;
switch(change) {
case NFSD_SET:
nfsd_supported_minorversions[minorversion] = true;
nfsd_vers(4, NFSD_SET);
if (nn->nfsd4_minorversions) {
nfsd_vers(nn, 4, NFSD_SET);
nn->nfsd4_minorversions[minorversion] =
nfsd_vers(nn, 4, NFSD_TEST);
}
break;
case NFSD_CLEAR:
nfsd_supported_minorversions[minorversion] = false;
nfsd_adjust_nfsd_versions4();
nfsd_netns_init_versions(nn);
if (nn->nfsd4_minorversions) {
nn->nfsd4_minorversions[minorversion] = false;
nfsd_adjust_nfsd_versions4(nn);
}
break;
case NFSD_TEST:
return nfsd_supported_minorversions[minorversion];
if (nn->nfsd4_minorversions)
return nn->nfsd4_minorversions[minorversion];
return nfsd_vers(nn, 4, NFSD_TEST);
case NFSD_AVAIL:
return minorversion <= NFSD_SUPPORTED_MINOR_VERSION;
return minorversion <= NFSD_SUPPORTED_MINOR_VERSION &&
nfsd_vers(nn, 4, NFSD_AVAIL);
}
return 0;
}
@ -205,7 +283,7 @@ int nfsd_nrthreads(struct net *net)
return rv;
}
static int nfsd_init_socks(struct net *net)
static int nfsd_init_socks(struct net *net, const struct cred *cred)
{
int error;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
@ -214,12 +292,12 @@ static int nfsd_init_socks(struct net *net)
return 0;
error = svc_create_xprt(nn->nfsd_serv, "udp", net, PF_INET, NFS_PORT,
SVC_SOCK_DEFAULTS);
SVC_SOCK_DEFAULTS, cred);
if (error < 0)
return error;
error = svc_create_xprt(nn->nfsd_serv, "tcp", net, PF_INET, NFS_PORT,
SVC_SOCK_DEFAULTS);
SVC_SOCK_DEFAULTS, cred);
if (error < 0)
return error;
@ -265,16 +343,12 @@ static void nfsd_shutdown_generic(void)
nfsd_racache_shutdown();
}
static bool nfsd_needs_lockd(void)
static bool nfsd_needs_lockd(struct nfsd_net *nn)
{
#if defined(CONFIG_NFSD_V3)
return (nfsd_versions[2] != NULL) || (nfsd_versions[3] != NULL);
#else
return (nfsd_versions[2] != NULL);
#endif
return nfsd_vers(nn, 2, NFSD_TEST) || nfsd_vers(nn, 3, NFSD_TEST);
}
static int nfsd_startup_net(int nrservs, struct net *net)
static int nfsd_startup_net(int nrservs, struct net *net, const struct cred *cred)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
int ret;
@ -285,12 +359,12 @@ static int nfsd_startup_net(int nrservs, struct net *net)
ret = nfsd_startup_generic(nrservs);
if (ret)
return ret;
ret = nfsd_init_socks(net);
ret = nfsd_init_socks(net, cred);
if (ret)
goto out_socks;
if (nfsd_needs_lockd() && !nn->lockd_up) {
ret = lockd_up(net);
if (nfsd_needs_lockd(nn) && !nn->lockd_up) {
ret = lockd_up(net, cred);
if (ret)
goto out_socks;
nn->lockd_up = 1;
@ -422,20 +496,20 @@ static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
nfsd_export_flush(net);
}
void nfsd_reset_versions(void)
void nfsd_reset_versions(struct nfsd_net *nn)
{
int i;
for (i = 0; i < NFSD_NRVERS; i++)
if (nfsd_vers(i, NFSD_TEST))
if (nfsd_vers(nn, i, NFSD_TEST))
return;
for (i = 0; i < NFSD_NRVERS; i++)
if (i != 4)
nfsd_vers(i, NFSD_SET);
nfsd_vers(nn, i, NFSD_SET);
else {
int minor = 0;
while (nfsd_minorversion(minor, NFSD_SET) >= 0)
while (nfsd_minorversion(nn, minor, NFSD_SET) >= 0)
minor++;
}
}
@ -503,7 +577,7 @@ int nfsd_create_serv(struct net *net)
}
if (nfsd_max_blksize == 0)
nfsd_max_blksize = nfsd_get_default_max_blksize();
nfsd_reset_versions();
nfsd_reset_versions(nn);
nn->nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
&nfsd_thread_sv_ops);
if (nn->nfsd_serv == NULL)
@ -623,7 +697,7 @@ int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
* this is the first time nrservs is nonzero.
*/
int
nfsd_svc(int nrservs, struct net *net)
nfsd_svc(int nrservs, struct net *net, const struct cred *cred)
{
int error;
bool nfsd_up_before;
@ -645,7 +719,7 @@ nfsd_svc(int nrservs, struct net *net)
nfsd_up_before = nn->nfsd_net_up;
error = nfsd_startup_net(nrservs, net);
error = nfsd_startup_net(nrservs, net, cred);
if (error)
goto out_destroy;
error = nn->nfsd_serv->sv_ops->svo_setup(nn->nfsd_serv,
@ -667,6 +741,101 @@ out:
return error;
}
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
static bool
nfsd_support_acl_version(int vers)
{
if (vers >= NFSD_ACL_MINVERS && vers < NFSD_ACL_NRVERS)
return nfsd_acl_version[vers] != NULL;
return false;
}
static int
nfsd_acl_rpcbind_set(struct net *net, const struct svc_program *progp,
u32 version, int family, unsigned short proto,
unsigned short port)
{
if (!nfsd_support_acl_version(version) ||
!nfsd_vers(net_generic(net, nfsd_net_id), version, NFSD_TEST))
return 0;
return svc_generic_rpcbind_set(net, progp, version, family,
proto, port);
}
static __be32
nfsd_acl_init_request(struct svc_rqst *rqstp,
const struct svc_program *progp,
struct svc_process_info *ret)
{
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
int i;
if (likely(nfsd_support_acl_version(rqstp->rq_vers) &&
nfsd_vers(nn, rqstp->rq_vers, NFSD_TEST)))
return svc_generic_init_request(rqstp, progp, ret);
ret->mismatch.lovers = NFSD_ACL_NRVERS;
for (i = NFSD_ACL_MINVERS; i < NFSD_ACL_NRVERS; i++) {
if (nfsd_support_acl_version(rqstp->rq_vers) &&
nfsd_vers(nn, i, NFSD_TEST)) {
ret->mismatch.lovers = i;
break;
}
}
if (ret->mismatch.lovers == NFSD_ACL_NRVERS)
return rpc_prog_unavail;
ret->mismatch.hivers = NFSD_ACL_MINVERS;
for (i = NFSD_ACL_NRVERS - 1; i >= NFSD_ACL_MINVERS; i--) {
if (nfsd_support_acl_version(rqstp->rq_vers) &&
nfsd_vers(nn, i, NFSD_TEST)) {
ret->mismatch.hivers = i;
break;
}
}
return rpc_prog_mismatch;
}
#endif
static int
nfsd_rpcbind_set(struct net *net, const struct svc_program *progp,
u32 version, int family, unsigned short proto,
unsigned short port)
{
if (!nfsd_vers(net_generic(net, nfsd_net_id), version, NFSD_TEST))
return 0;
return svc_generic_rpcbind_set(net, progp, version, family,
proto, port);
}
static __be32
nfsd_init_request(struct svc_rqst *rqstp,
const struct svc_program *progp,
struct svc_process_info *ret)
{
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
int i;
if (likely(nfsd_vers(nn, rqstp->rq_vers, NFSD_TEST)))
return svc_generic_init_request(rqstp, progp, ret);
ret->mismatch.lovers = NFSD_NRVERS;
for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) {
if (nfsd_vers(nn, i, NFSD_TEST)) {
ret->mismatch.lovers = i;
break;
}
}
if (ret->mismatch.lovers == NFSD_NRVERS)
return rpc_prog_unavail;
ret->mismatch.hivers = NFSD_MINVERS;
for (i = NFSD_NRVERS - 1; i >= NFSD_MINVERS; i--) {
if (nfsd_vers(nn, i, NFSD_TEST)) {
ret->mismatch.hivers = i;
break;
}
}
return rpc_prog_mismatch;
}
/*
* This is the NFS server kernel thread

17
fs/nfsd/nfsxdr.c
View File

@ -71,7 +71,7 @@ decode_filename(__be32 *p, char **namp, unsigned int *lenp)
}
static __be32 *
decode_sattr(__be32 *p, struct iattr *iap)
decode_sattr(__be32 *p, struct iattr *iap, struct user_namespace *userns)
{
u32 tmp, tmp1;
@ -86,12 +86,12 @@ decode_sattr(__be32 *p, struct iattr *iap)
iap->ia_mode = tmp;
}
if ((tmp = ntohl(*p++)) != (u32)-1) {
iap->ia_uid = make_kuid(&init_user_ns, tmp);
iap->ia_uid = make_kuid(userns, tmp);
if (uid_valid(iap->ia_uid))
iap->ia_valid |= ATTR_UID;
}
if ((tmp = ntohl(*p++)) != (u32)-1) {
iap->ia_gid = make_kgid(&init_user_ns, tmp);
iap->ia_gid = make_kgid(userns, tmp);
if (gid_valid(iap->ia_gid))
iap->ia_valid |= ATTR_GID;
}
@ -129,6 +129,7 @@ static __be32 *
encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
struct kstat *stat)
{
struct user_namespace *userns = nfsd_user_namespace(rqstp);
struct dentry *dentry = fhp->fh_dentry;
int type;
struct timespec64 time;
@ -139,8 +140,8 @@ encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
*p++ = htonl(nfs_ftypes[type >> 12]);
*p++ = htonl((u32) stat->mode);
*p++ = htonl((u32) stat->nlink);
*p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid));
*p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid));
*p++ = htonl((u32) from_kuid_munged(userns, stat->uid));
*p++ = htonl((u32) from_kgid_munged(userns, stat->gid));
if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
*p++ = htonl(NFS_MAXPATHLEN);
@ -216,7 +217,7 @@ nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
p = decode_fh(p, &args->fh);
if (!p)
return 0;
p = decode_sattr(p, &args->attrs);
p = decode_sattr(p, &args->attrs, nfsd_user_namespace(rqstp));
return xdr_argsize_check(rqstp, p);
}
@ -319,7 +320,7 @@ nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p)
if ( !(p = decode_fh(p, &args->fh))
|| !(p = decode_filename(p, &args->name, &args->len)))
return 0;
p = decode_sattr(p, &args->attrs);
p = decode_sattr(p, &args->attrs, nfsd_user_namespace(rqstp));
return xdr_argsize_check(rqstp, p);
}
@ -398,7 +399,7 @@ nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p)
return 0;
p += xdrlen;
}
decode_sattr(p, &args->attrs);
decode_sattr(p, &args->attrs, nfsd_user_namespace(rqstp));
return 1;
}

8
fs/nfsd/state.h
View File

@ -368,7 +368,7 @@ struct nfs4_client {
struct nfs4_client_reclaim {
struct list_head cr_strhash; /* hash by cr_name */
struct nfs4_client *cr_clp; /* pointer to associated clp */
char cr_recdir[HEXDIR_LEN]; /* recover dir */
struct xdr_netobj cr_name; /* recovery dir name */
};
/* A reasonable value for REPLAY_ISIZE was estimated as follows:
@ -620,7 +620,7 @@ void nfs4_put_stid(struct nfs4_stid *s);
void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid);
void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
extern void nfs4_release_reclaim(struct nfsd_net *);
extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir,
extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct xdr_netobj name,
struct nfsd_net *nn);
extern __be32 nfs4_check_open_reclaim(clientid_t *clid,
struct nfsd4_compound_state *cstate, struct nfsd_net *nn);
@ -635,9 +635,9 @@ extern void nfsd4_destroy_callback_queue(void);
extern void nfsd4_shutdown_callback(struct nfs4_client *);
extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp);
extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name,
extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
struct nfsd_net *nn);
extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn);
extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);
struct nfs4_file *find_file(struct knfsd_fh *fh);
void put_nfs4_file(struct nfs4_file *fi);

8
fs/nfsd/vfs.c
View File

@ -1786,12 +1786,12 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
rdentry = lookup_one_len(fname, dentry, flen);
host_err = PTR_ERR(rdentry);
if (IS_ERR(rdentry))
goto out_nfserr;
goto out_drop_write;
if (d_really_is_negative(rdentry)) {
dput(rdentry);
err = nfserr_noent;
goto out;
host_err = -ENOENT;
goto out_drop_write;
}
if (!type)
@ -1805,6 +1805,8 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
host_err = commit_metadata(fhp);
dput(rdentry);
out_drop_write:
fh_drop_write(fhp);
out_nfserr:
err = nfserrno(host_err);
out:

5
fs/nfsd/vfs.h
View File

@ -120,8 +120,11 @@ void nfsd_put_raparams(struct file *file, struct raparms *ra);
static inline int fh_want_write(struct svc_fh *fh)
{
int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
int ret;
if (fh->fh_want_write)
return 0;
ret = mnt_want_write(fh->fh_export->ex_path.mnt);
if (!ret)
fh->fh_want_write = true;
return ret;

2
include/linux/lockd/bind.h
View File

@ -76,7 +76,7 @@ struct nlmclnt_operations {
};
extern int nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl, void *data);
extern int lockd_up(struct net *net);
extern int lockd_up(struct net *net, const struct cred *cred);
extern void lockd_down(struct net *net);
#endif /* LINUX_LOCKD_BIND_H */

33
include/linux/sunrpc/svc.h
View File

@ -271,6 +271,7 @@ struct svc_rqst {
#define RQ_VICTIM (5) /* about to be shut down */
#define RQ_BUSY (6) /* request is busy */
#define RQ_DATA (7) /* request has data */
#define RQ_AUTHERR (8) /* Request status is auth error */
unsigned long rq_flags; /* flags field */
ktime_t rq_qtime; /* enqueue time */
@ -382,6 +383,16 @@ struct svc_deferred_req {
__be32 args[0];
};
struct svc_process_info {
union {
int (*dispatch)(struct svc_rqst *, __be32 *);
struct {
unsigned int lovers;
unsigned int hivers;
} mismatch;
};
};
/*
* List of RPC programs on the same transport endpoint
*/
@ -396,6 +407,14 @@ struct svc_program {
char * pg_class; /* class name: services sharing authentication */
struct svc_stat * pg_stats; /* rpc statistics */
int (*pg_authenticate)(struct svc_rqst *);
__be32 (*pg_init_request)(struct svc_rqst *,
const struct svc_program *,
struct svc_process_info *);
int (*pg_rpcbind_set)(struct net *net,
const struct svc_program *,
u32 version, int family,
unsigned short proto,
unsigned short port);
};
/*
@ -504,6 +523,20 @@ unsigned int svc_fill_write_vector(struct svc_rqst *rqstp,
char *svc_fill_symlink_pathname(struct svc_rqst *rqstp,
struct kvec *first, void *p,
size_t total);
__be32 svc_return_autherr(struct svc_rqst *rqstp, __be32 auth_err);
__be32 svc_generic_init_request(struct svc_rqst *rqstp,
const struct svc_program *progp,
struct svc_process_info *procinfo);
int svc_generic_rpcbind_set(struct net *net,
const struct svc_program *progp,
u32 version, int family,
unsigned short proto,
unsigned short port);
int svc_rpcbind_set_version(struct net *net,
const struct svc_program *progp,
u32 version, int family,
unsigned short proto,
unsigned short port);
#define RPC_MAX_ADDRBUFLEN (63U)

4
include/linux/sunrpc/svc_xprt.h
View File

@ -86,6 +86,7 @@ struct svc_xprt {
struct list_head xpt_users; /* callbacks on free */
struct net *xpt_net;
const struct cred *xpt_cred;
struct rpc_xprt *xpt_bc_xprt; /* NFSv4.1 backchannel */
struct rpc_xprt_switch *xpt_bc_xps; /* NFSv4.1 backchannel */
};
@ -119,7 +120,8 @@ void svc_unreg_xprt_class(struct svc_xprt_class *);
void svc_xprt_init(struct net *, struct svc_xprt_class *, struct svc_xprt *,
struct svc_serv *);
int svc_create_xprt(struct svc_serv *, const char *, struct net *,
const int, const unsigned short, int);
const int, const unsigned short, int,
const struct cred *);
void svc_xprt_do_enqueue(struct svc_xprt *xprt);
void svc_xprt_enqueue(struct svc_xprt *xprt);
void svc_xprt_put(struct svc_xprt *xprt);

3
include/linux/sunrpc/svcsock.h
View File

@ -59,7 +59,8 @@ void svc_drop(struct svc_rqst *);
void svc_sock_update_bufs(struct svc_serv *serv);
bool svc_alien_sock(struct net *net, int fd);
int svc_addsock(struct svc_serv *serv, const int fd,
char *name_return, const size_t len);
char *name_return, const size_t len,
const struct cred *cred);
void svc_init_xprt_sock(void);
void svc_cleanup_xprt_sock(void);
struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot);

1
include/uapi/linux/nfsd/cld.h
View File

@ -36,6 +36,7 @@ enum cld_command {
Cld_Remove, /* remove record of this cm_id */
Cld_Check, /* is this cm_id allowed? */
Cld_GraceDone, /* grace period is complete */
Cld_GraceStart,
};
/* representation of long-form NFSv4 client ID */

6
net/sunrpc/auth_gss/svcauth_gss.c
View File

@ -474,12 +474,12 @@ static int rsc_parse(struct cache_detail *cd,
* treatment so are checked for validity here.)
*/
/* uid */
rsci.cred.cr_uid = make_kuid(&init_user_ns, id);
rsci.cred.cr_uid = make_kuid(current_user_ns(), id);
/* gid */
if (get_int(&mesg, &id))
goto out;
rsci.cred.cr_gid = make_kgid(&init_user_ns, id);
rsci.cred.cr_gid = make_kgid(current_user_ns(), id);
/* number of additional gid's */
if (get_int(&mesg, &N))
@ -497,7 +497,7 @@ static int rsc_parse(struct cache_detail *cd,
kgid_t kgid;
if (get_int(&mesg, &id))
goto out;
kgid = make_kgid(&init_user_ns, id);
kgid = make_kgid(current_user_ns(), id);
if (!gid_valid(kgid))
goto out;
rsci.cred.cr_group_info->gid[i] = kgid;

4
net/sunrpc/cache.c
View File

@ -40,6 +40,7 @@
static bool cache_defer_req(struct cache_req *req, struct cache_head *item);
static void cache_revisit_request(struct cache_head *item);
static bool cache_listeners_exist(struct cache_detail *detail);
static void cache_init(struct cache_head *h, struct cache_detail *detail)
{
@ -306,7 +307,8 @@ int cache_check(struct cache_detail *detail,
cache_fresh_unlocked(h, detail);
break;
}
}
} else if (!cache_listeners_exist(detail))
rv = try_to_negate_entry(detail, h);
}
if (rv == -EAGAIN) {

300
net/sunrpc/svc.c
View File

@ -993,6 +993,58 @@ static int __svc_register(struct net *net, const char *progname,
return error;
}
int svc_rpcbind_set_version(struct net *net,
const struct svc_program *progp,
u32 version, int family,
unsigned short proto,
unsigned short port)
{
dprintk("svc: svc_register(%sv%d, %s, %u, %u)\n",
progp->pg_name, version,
proto == IPPROTO_UDP? "udp" : "tcp",
port, family);
return __svc_register(net, progp->pg_name, progp->pg_prog,
version, family, proto, port);
}
EXPORT_SYMBOL_GPL(svc_rpcbind_set_version);
int svc_generic_rpcbind_set(struct net *net,
const struct svc_program *progp,
u32 version, int family,
unsigned short proto,
unsigned short port)
{
const struct svc_version *vers = progp->pg_vers[version];
int error;
if (vers == NULL)
return 0;
if (vers->vs_hidden) {
dprintk("svc: svc_register(%sv%d, %s, %u, %u)"
" (but not telling portmap)\n",
progp->pg_name, version,
proto == IPPROTO_UDP? "udp" : "tcp",
port, family);
return 0;
}
/*
* Don't register a UDP port if we need congestion
* control.
*/
if (vers->vs_need_cong_ctrl && proto == IPPROTO_UDP)
return 0;
error = svc_rpcbind_set_version(net, progp, version,
family, proto, port);
return (vers->vs_rpcb_optnl) ? 0 : error;
}
EXPORT_SYMBOL_GPL(svc_generic_rpcbind_set);
/**
* svc_register - register an RPC service with the local portmapper
* @serv: svc_serv struct for the service to register
@ -1008,7 +1060,6 @@ int svc_register(const struct svc_serv *serv, struct net *net,
const unsigned short port)
{
struct svc_program *progp;
const struct svc_version *vers;
unsigned int i;
int error = 0;
@ -1018,37 +1069,9 @@ int svc_register(const struct svc_serv *serv, struct net *net,
for (progp = serv->sv_program; progp; progp = progp->pg_next) {
for (i = 0; i < progp->pg_nvers; i++) {
vers = progp->pg_vers[i];
if (vers == NULL)
continue;
dprintk("svc: svc_register(%sv%d, %s, %u, %u)%s\n",
progp->pg_name,
i,
proto == IPPROTO_UDP? "udp" : "tcp",
port,
family,
vers->vs_hidden ?
" (but not telling portmap)" : "");
if (vers->vs_hidden)
continue;
/*
* Don't register a UDP port if we need congestion
* control.
*/
if (vers->vs_need_cong_ctrl && proto == IPPROTO_UDP)
continue;
error = __svc_register(net, progp->pg_name, progp->pg_prog,
i, family, proto, port);
if (vers->vs_rpcb_optnl) {
error = 0;
continue;
}
error = progp->pg_rpcbind_set(net, progp, i,
family, proto, port);
if (error < 0) {
printk(KERN_WARNING "svc: failed to register "
"%sv%u RPC service (errno %d).\n",
@ -1144,6 +1167,114 @@ void svc_printk(struct svc_rqst *rqstp, const char *fmt, ...)
static __printf(2,3) void svc_printk(struct svc_rqst *rqstp, const char *fmt, ...) {}
#endif
__be32
svc_return_autherr(struct svc_rqst *rqstp, __be32 auth_err)
{
set_bit(RQ_AUTHERR, &rqstp->rq_flags);
return auth_err;
}
EXPORT_SYMBOL_GPL(svc_return_autherr);
static __be32
svc_get_autherr(struct svc_rqst *rqstp, __be32 *statp)
{
if (test_and_clear_bit(RQ_AUTHERR, &rqstp->rq_flags))
return *statp;
return rpc_auth_ok;
}
static int
svc_generic_dispatch(struct svc_rqst *rqstp, __be32 *statp)
{
struct kvec *argv = &rqstp->rq_arg.head[0];
struct kvec *resv = &rqstp->rq_res.head[0];
const struct svc_procedure *procp = rqstp->rq_procinfo;
/*
* Decode arguments
* XXX: why do we ignore the return value?
*/
if (procp->pc_decode &&
!procp->pc_decode(rqstp, argv->iov_base)) {
*statp = rpc_garbage_args;
return 1;
}
*statp = procp->pc_func(rqstp);
if (*statp == rpc_drop_reply ||
test_bit(RQ_DROPME, &rqstp->rq_flags))
return 0;
if (test_bit(RQ_AUTHERR, &rqstp->rq_flags))
return 1;
if (*statp != rpc_success)
return 1;
/* Encode reply */
if (procp->pc_encode &&
!procp->pc_encode(rqstp, resv->iov_base + resv->iov_len)) {
dprintk("svc: failed to encode reply\n");
/* serv->sv_stats->rpcsystemerr++; */
*statp = rpc_system_err;
}
return 1;
}
__be32
svc_generic_init_request(struct svc_rqst *rqstp,
const struct svc_program *progp,
struct svc_process_info *ret)
{
const struct svc_version *versp = NULL; /* compiler food */
const struct svc_procedure *procp = NULL;
if (rqstp->rq_vers >= progp->pg_nvers )
goto err_bad_vers;
versp = progp->pg_vers[rqstp->rq_vers];
if (!versp)
goto err_bad_vers;
/*
* Some protocol versions (namely NFSv4) require some form of
* congestion control. (See RFC 7530 section 3.1 paragraph 2)
* In other words, UDP is not allowed. We mark those when setting
* up the svc_xprt, and verify that here.
*
* The spec is not very clear about what error should be returned
* when someone tries to access a server that is listening on UDP
* for lower versions. RPC_PROG_MISMATCH seems to be the closest
* fit.
*/
if (versp->vs_need_cong_ctrl && rqstp->rq_xprt &&
!test_bit(XPT_CONG_CTRL, &rqstp->rq_xprt->xpt_flags))
goto err_bad_vers;
if (rqstp->rq_proc >= versp->vs_nproc)
goto err_bad_proc;
rqstp->rq_procinfo = procp = &versp->vs_proc[rqstp->rq_proc];
if (!procp)
goto err_bad_proc;
/* Initialize storage for argp and resp */
memset(rqstp->rq_argp, 0, procp->pc_argsize);
memset(rqstp->rq_resp, 0, procp->pc_ressize);
/* Bump per-procedure stats counter */
versp->vs_count[rqstp->rq_proc]++;
ret->dispatch = versp->vs_dispatch;
return rpc_success;
err_bad_vers:
ret->mismatch.lovers = progp->pg_lovers;
ret->mismatch.hivers = progp->pg_hivers;
return rpc_prog_mismatch;
err_bad_proc:
return rpc_proc_unavail;
}
EXPORT_SYMBOL_GPL(svc_generic_init_request);
/*
* Common routine for processing the RPC request.
*/
@ -1151,11 +1282,11 @@ static int
svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
{
struct svc_program *progp;
const struct svc_version *versp = NULL; /* compiler food */
const struct svc_procedure *procp = NULL;
struct svc_serv *serv = rqstp->rq_server;
struct svc_process_info process;
__be32 *statp;
u32 prog, vers, proc;
u32 prog, vers;
__be32 auth_stat, rpc_stat;
int auth_res;
__be32 *reply_statp;
@ -1187,8 +1318,8 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
svc_putnl(resv, 0); /* ACCEPT */
rqstp->rq_prog = prog = svc_getnl(argv); /* program number */
rqstp->rq_vers = vers = svc_getnl(argv); /* version number */
rqstp->rq_proc = proc = svc_getnl(argv); /* procedure number */
rqstp->rq_vers = svc_getnl(argv); /* version number */
rqstp->rq_proc = svc_getnl(argv); /* procedure number */
for (progp = serv->sv_program; progp; progp = progp->pg_next)
if (prog == progp->pg_prog)
@ -1226,29 +1357,22 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
if (progp == NULL)
goto err_bad_prog;
if (vers >= progp->pg_nvers ||
!(versp = progp->pg_vers[vers]))
rpc_stat = progp->pg_init_request(rqstp, progp, &process);
switch (rpc_stat) {
case rpc_success:
break;
case rpc_prog_unavail:
goto err_bad_prog;
case rpc_prog_mismatch:
goto err_bad_vers;
/*
* Some protocol versions (namely NFSv4) require some form of
* congestion control. (See RFC 7530 section 3.1 paragraph 2)
* In other words, UDP is not allowed. We mark those when setting
* up the svc_xprt, and verify that here.
*
* The spec is not very clear about what error should be returned
* when someone tries to access a server that is listening on UDP
* for lower versions. RPC_PROG_MISMATCH seems to be the closest
* fit.
*/
if (versp->vs_need_cong_ctrl && rqstp->rq_xprt &&
!test_bit(XPT_CONG_CTRL, &rqstp->rq_xprt->xpt_flags))
goto err_bad_vers;
procp = versp->vs_proc + proc;
if (proc >= versp->vs_nproc || !procp->pc_func)
case rpc_proc_unavail:
goto err_bad_proc;
}
procp = rqstp->rq_procinfo;
/* Should this check go into the dispatcher? */
if (!procp || !procp->pc_func)
goto err_bad_proc;
rqstp->rq_procinfo = procp;
/* Syntactic check complete */
serv->sv_stats->rpccnt++;
@ -1258,13 +1382,6 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
statp = resv->iov_base +resv->iov_len;
svc_putnl(resv, RPC_SUCCESS);
/* Bump per-procedure stats counter */
versp->vs_count[proc]++;
/* Initialize storage for argp and resp */
memset(rqstp->rq_argp, 0, procp->pc_argsize);
memset(rqstp->rq_resp, 0, procp->pc_ressize);
/* un-reserve some of the out-queue now that we have a
* better idea of reply size
*/
@ -1272,43 +1389,18 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
svc_reserve_auth(rqstp, procp->pc_xdrressize<<2);
/* Call the function that processes the request. */
if (!versp->vs_dispatch) {
/*
* Decode arguments
* XXX: why do we ignore the return value?
*/
if (procp->pc_decode &&
!procp->pc_decode(rqstp, argv->iov_base))
if (!process.dispatch) {
if (!svc_generic_dispatch(rqstp, statp))
goto release_dropit;
if (*statp == rpc_garbage_args)
goto err_garbage;
*statp = procp->pc_func(rqstp);
/* Encode reply */
if (*statp == rpc_drop_reply ||
test_bit(RQ_DROPME, &rqstp->rq_flags)) {
if (procp->pc_release)
procp->pc_release(rqstp);
goto dropit;
}
if (*statp == rpc_autherr_badcred) {
if (procp->pc_release)
procp->pc_release(rqstp);
goto err_bad_auth;
}
if (*statp == rpc_success && procp->pc_encode &&
!procp->pc_encode(rqstp, resv->iov_base + resv->iov_len)) {
dprintk("svc: failed to encode reply\n");
/* serv->sv_stats->rpcsystemerr++; */
*statp = rpc_system_err;
}
auth_stat = svc_get_autherr(rqstp, statp);
if (auth_stat != rpc_auth_ok)
goto err_release_bad_auth;
} else {
dprintk("svc: calling dispatcher\n");
if (!versp->vs_dispatch(rqstp, statp)) {
/* Release reply info */
if (procp->pc_release)
procp->pc_release(rqstp);
goto dropit;
}
if (!process.dispatch(rqstp, statp))
goto release_dropit; /* Release reply info */
}
/* Check RPC status result */
@ -1327,6 +1419,9 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
goto close;
return 1; /* Caller can now send it */
release_dropit:
if (procp->pc_release)
procp->pc_release(rqstp);
dropit:
svc_authorise(rqstp); /* doesn't hurt to call this twice */
dprintk("svc: svc_process dropit\n");
@ -1351,6 +1446,9 @@ err_bad_rpc:
svc_putnl(resv, 2);
goto sendit;
err_release_bad_auth:
if (procp->pc_release)
procp->pc_release(rqstp);
err_bad_auth:
dprintk("svc: authentication failed (%d)\n", ntohl(auth_stat));
serv->sv_stats->rpcbadauth++;
@ -1369,16 +1467,16 @@ err_bad_prog:
err_bad_vers:
svc_printk(rqstp, "unknown version (%d for prog %d, %s)\n",
vers, prog, progp->pg_name);
rqstp->rq_vers, rqstp->rq_prog, progp->pg_name);
serv->sv_stats->rpcbadfmt++;
svc_putnl(resv, RPC_PROG_MISMATCH);
svc_putnl(resv, progp->pg_lovers);
svc_putnl(resv, progp->pg_hivers);
svc_putnl(resv, process.mismatch.lovers);
svc_putnl(resv, process.mismatch.hivers);
goto sendit;
err_bad_proc:
svc_printk(rqstp, "unknown procedure (%d)\n", proc);
svc_printk(rqstp, "unknown procedure (%d)\n", rqstp->rq_proc);
serv->sv_stats->rpcbadfmt++;
svc_putnl(resv, RPC_PROC_UNAVAIL);

17
net/sunrpc/svc_xprt.c
View File

@ -136,6 +136,7 @@ static void svc_xprt_free(struct kref *kref)
struct module *owner = xprt->xpt_class->xcl_owner;
if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags))
svcauth_unix_info_release(xprt);
put_cred(xprt->xpt_cred);
put_net(xprt->xpt_net);
/* See comment on corresponding get in xs_setup_bc_tcp(): */
if (xprt->xpt_bc_xprt)
@ -252,7 +253,8 @@ void svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *new)
static int _svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
struct net *net, const int family,
const unsigned short port, int flags)
const unsigned short port, int flags,
const struct cred *cred)
{
struct svc_xprt_class *xcl;
@ -273,6 +275,7 @@ static int _svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
module_put(xcl->xcl_owner);
return PTR_ERR(newxprt);
}
newxprt->xpt_cred = get_cred(cred);
svc_add_new_perm_xprt(serv, newxprt);
newport = svc_xprt_local_port(newxprt);
return newport;
@ -286,15 +289,16 @@ static int _svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
int svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
struct net *net, const int family,
const unsigned short port, int flags)
const unsigned short port, int flags,
const struct cred *cred)
{
int err;
dprintk("svc: creating transport %s[%d]\n", xprt_name, port);
err = _svc_create_xprt(serv, xprt_name, net, family, port, flags);
err = _svc_create_xprt(serv, xprt_name, net, family, port, flags, cred);
if (err == -EPROTONOSUPPORT) {
request_module("svc%s", xprt_name);
err = _svc_create_xprt(serv, xprt_name, net, family, port, flags);
err = _svc_create_xprt(serv, xprt_name, net, family, port, flags, cred);
}
if (err < 0)
dprintk("svc: transport %s not found, err %d\n",
@ -782,9 +786,10 @@ static int svc_handle_xprt(struct svc_rqst *rqstp, struct svc_xprt *xprt)
__module_get(xprt->xpt_class->xcl_owner);
svc_check_conn_limits(xprt->xpt_server);
newxpt = xprt->xpt_ops->xpo_accept(xprt);
if (newxpt)
if (newxpt) {
newxpt->xpt_cred = get_cred(xprt->xpt_cred);
svc_add_new_temp_xprt(serv, newxpt);
else
} else
module_put(xprt->xpt_class->xcl_owner);
} else if (svc_xprt_reserve_slot(rqstp, xprt)) {
/* XPT_DATA|XPT_DEFERRED case: */

15
net/sunrpc/svcauth_unix.c
View File

@ -500,7 +500,7 @@ static int unix_gid_parse(struct cache_detail *cd,
rv = get_int(&mesg, &id);
if (rv)
return -EINVAL;
uid = make_kuid(&init_user_ns, id);
uid = make_kuid(current_user_ns(), id);
ug.uid = uid;
expiry = get_expiry(&mesg);
@ -522,7 +522,7 @@ static int unix_gid_parse(struct cache_detail *cd,
err = -EINVAL;
if (rv)
goto out;
kgid = make_kgid(&init_user_ns, gid);
kgid = make_kgid(current_user_ns(), gid);
if (!gid_valid(kgid))
goto out;
ug.gi->gid[i] = kgid;
@ -555,7 +555,7 @@ static int unix_gid_show(struct seq_file *m,
struct cache_detail *cd,
struct cache_head *h)
{
struct user_namespace *user_ns = &init_user_ns;
struct user_namespace *user_ns = m->file->f_cred->user_ns;
struct unix_gid *ug;
int i;
int glen;
@ -796,6 +796,7 @@ svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
struct kvec *argv = &rqstp->rq_arg.head[0];
struct kvec *resv = &rqstp->rq_res.head[0];
struct svc_cred *cred = &rqstp->rq_cred;
struct user_namespace *userns;
u32 slen, i;
int len = argv->iov_len;
@ -816,8 +817,10 @@ svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
* (export-specific) anonymous id by nfsd_setuser.
* Supplementary gid's will be left alone.
*/
cred->cr_uid = make_kuid(&init_user_ns, svc_getnl(argv)); /* uid */
cred->cr_gid = make_kgid(&init_user_ns, svc_getnl(argv)); /* gid */
userns = (rqstp->rq_xprt && rqstp->rq_xprt->xpt_cred) ?
rqstp->rq_xprt->xpt_cred->user_ns : &init_user_ns;
cred->cr_uid = make_kuid(userns, svc_getnl(argv)); /* uid */
cred->cr_gid = make_kgid(userns, svc_getnl(argv)); /* gid */
slen = svc_getnl(argv); /* gids length */
if (slen > UNX_NGROUPS || (len -= (slen + 2)*4) < 0)
goto badcred;
@ -825,7 +828,7 @@ svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
if (cred->cr_group_info == NULL)
return SVC_CLOSE;
for (i = 0; i < slen; i++) {
kgid_t kgid = make_kgid(&init_user_ns, svc_getnl(argv));
kgid_t kgid = make_kgid(userns, svc_getnl(argv));
cred->cr_group_info->gid[i] = kgid;
}
groups_sort(cred->cr_group_info);

4
net/sunrpc/svcsock.c
View File

@ -1332,13 +1332,14 @@ EXPORT_SYMBOL_GPL(svc_alien_sock);
* @fd: file descriptor of the new listener
* @name_return: pointer to buffer to fill in with name of listener
* @len: size of the buffer
* @cred: credential
*
* Fills in socket name and returns positive length of name if successful.
* Name is terminated with '\n'. On error, returns a negative errno
* value.
*/
int svc_addsock(struct svc_serv *serv, const int fd, char *name_return,
const size_t len)
const size_t len, const struct cred *cred)
{
int err = 0;
struct socket *so = sockfd_lookup(fd, &err);
@ -1371,6 +1372,7 @@ int svc_addsock(struct svc_serv *serv, const int fd, char *name_return,
salen = kernel_getsockname(svsk->sk_sock, sin);
if (salen >= 0)
svc_xprt_set_local(&svsk->sk_xprt, sin, salen);
svsk->sk_xprt.xpt_cred = get_cred(cred);
svc_add_new_perm_xprt(serv, &svsk->sk_xprt);
return svc_one_sock_name(svsk, name_return, len);
out: