/
handle.c
3218 lines (2800 loc) · 88.3 KB
/
handle.c
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// SPDX-License-Identifier: LGPL-3.0-or-later
/*
* vim:noexpandtab:shiftwidth=8:tabstop=8:
*
* Copyright (C) Max Matveev, 2012
* Copyright CEA/DAM/DIF (2008)
*
* contributeur : Philippe DENIEL philippe.deniel@cea.fr
* Thomas LEIBOVICI thomas.leibovici@cea.fr
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
/* Proxy handle methods */
#include "config.h"
#include "fsal.h"
#include <assert.h>
#include <pthread.h>
#include <arpa/inet.h>
#include <sys/poll.h>
#include <netdb.h>
#include <urcu-bp.h>
#include "gsh_list.h"
#include "abstract_atomic.h"
#include "fsal_types.h"
#include "FSAL/fsal_commonlib.h"
#include "proxyv4_fsal_methods.h"
#include "fsal_nfsv4_macros.h"
#include "nfs_core.h"
#include "nfs_proto_functions.h"
#include "nfs_proto_tools.h"
#include "export_mgr.h"
#include "common_utils.h"
#include "fsal_convert.h"
#define FSAL_PROXY_NFS_V4 4
#define FSAL_PROXY_NFS_V4_MINOR 1
#define NB_RPC_SLOT 16
#define NB_MAX_OPERATIONS 10
/* NB! nfs_prog is just an easy way to get this info into the call
* It should really be fetched via export pointer */
/**
* We mutualize rpc_context and slot NFSv4.1.
*/
struct proxyv4_rpc_io_context {
pthread_mutex_t iolock;
pthread_cond_t iowait;
struct glist_head calls;
uint32_t rpc_xid;
bool iodone;
int ioresult;
unsigned int nfs_prog;
unsigned int sendbuf_sz;
unsigned int recvbuf_sz;
char *sendbuf;
char *recvbuf;
slotid4 slotid;
sequenceid4 seqid;
};
/* Use this to estimate storage requirements for fattr4 blob */
struct proxyv4_fattr_storage {
fattr4_type type;
fattr4_change change_time;
fattr4_size size;
fattr4_fsid fsid;
fattr4_filehandle filehandle;
fattr4_fileid fileid;
fattr4_mode mode;
fattr4_numlinks numlinks;
fattr4_owner owner;
fattr4_owner_group owner_group;
fattr4_space_used space_used;
fattr4_time_access time_access;
fattr4_time_metadata time_metadata;
fattr4_time_modify time_modify;
fattr4_rawdev rawdev;
char padowner[MAXNAMLEN + 1];
char padgroup[MAXNAMLEN + 1];
char padfh[NFS4_FHSIZE];
};
#define FATTR_BLOB_SZ sizeof(struct proxyv4_fattr_storage)
/*
* This is what becomes an opaque FSAL handle for the upper layers.
*
* The type is a placeholder for future expansion.
*/
struct proxyv4_handle_blob {
uint8_t len;
uint8_t type;
uint8_t bytes[0];
};
struct proxyv4_obj_handle {
struct fsal_obj_handle obj;
nfs_fh4 fh4;
#ifdef PROXYV4_HANDLE_MAPPING
nfs23_map_handle_t h23;
#endif
fsal_openflags_t openflags;
struct proxyv4_handle_blob blob;
};
static struct proxyv4_obj_handle *
proxyv4_alloc_handle(struct fsal_export *exp,
const nfs_fh4 *fh,
fattr4 *obj_attributes,
struct fsal_attrlist *attrs_out);
struct proxyv4_state {
struct state_t state;
stateid4 stateid;
};
struct state_t *proxyv4_alloc_state(struct fsal_export *exp_hdl,
enum state_type state_type,
struct state_t *related_state)
{
return init_state(gsh_calloc(1, sizeof(struct proxyv4_state)), exp_hdl,
state_type, related_state);
}
void proxyv4_free_state(struct fsal_export *exp_hdl, struct state_t *state)
{
struct proxyv4_state *proxyv4_state_id =
container_of(state, struct proxyv4_state, state);
gsh_free(proxyv4_state_id);
}
#define FSAL_VERIFIER_T_TO_VERIFIER4(verif4, fsal_verif) \
do { \
BUILD_BUG_ON(sizeof(fsal_verifier_t) != sizeof(verifier4)); \
memcpy(verif4, fsal_verif, sizeof(fsal_verifier_t)); \
} while (0)
static fsal_status_t nfsstat4_to_fsal(nfsstat4 nfsstatus)
{
switch (nfsstatus) {
case NFS4ERR_SAME:
case NFS4ERR_NOT_SAME:
case NFS4_OK:
return fsalstat(ERR_FSAL_NO_ERROR, (int)nfsstatus);
case NFS4ERR_PERM:
return fsalstat(ERR_FSAL_PERM, (int)nfsstatus);
case NFS4ERR_NOENT:
return fsalstat(ERR_FSAL_NOENT, (int)nfsstatus);
case NFS4ERR_IO:
return fsalstat(ERR_FSAL_IO, (int)nfsstatus);
case NFS4ERR_NXIO:
return fsalstat(ERR_FSAL_NXIO, (int)nfsstatus);
case NFS4ERR_EXPIRED:
case NFS4ERR_LOCKED:
case NFS4ERR_SHARE_DENIED:
case NFS4ERR_LOCK_RANGE:
case NFS4ERR_OPENMODE:
case NFS4ERR_FILE_OPEN:
case NFS4ERR_ACCESS:
case NFS4ERR_DENIED:
return fsalstat(ERR_FSAL_ACCESS, (int)nfsstatus);
case NFS4ERR_EXIST:
return fsalstat(ERR_FSAL_EXIST, (int)nfsstatus);
case NFS4ERR_XDEV:
return fsalstat(ERR_FSAL_XDEV, (int)nfsstatus);
case NFS4ERR_NOTDIR:
return fsalstat(ERR_FSAL_NOTDIR, (int)nfsstatus);
case NFS4ERR_ISDIR:
return fsalstat(ERR_FSAL_ISDIR, (int)nfsstatus);
case NFS4ERR_FBIG:
return fsalstat(ERR_FSAL_FBIG, 0);
case NFS4ERR_NOSPC:
return fsalstat(ERR_FSAL_NOSPC, (int)nfsstatus);
case NFS4ERR_ROFS:
return fsalstat(ERR_FSAL_ROFS, (int)nfsstatus);
case NFS4ERR_MLINK:
return fsalstat(ERR_FSAL_MLINK, (int)nfsstatus);
case NFS4ERR_NAMETOOLONG:
return fsalstat(ERR_FSAL_NAMETOOLONG, (int)nfsstatus);
case NFS4ERR_NOTEMPTY:
return fsalstat(ERR_FSAL_NOTEMPTY, (int)nfsstatus);
case NFS4ERR_DQUOT:
return fsalstat(ERR_FSAL_DQUOT, (int)nfsstatus);
case NFS4ERR_STALE:
return fsalstat(ERR_FSAL_STALE, (int)nfsstatus);
case NFS4ERR_NOFILEHANDLE:
case NFS4ERR_BADHANDLE:
return fsalstat(ERR_FSAL_BADHANDLE, (int)nfsstatus);
case NFS4ERR_BAD_COOKIE:
return fsalstat(ERR_FSAL_BADCOOKIE, (int)nfsstatus);
case NFS4ERR_NOTSUPP:
return fsalstat(ERR_FSAL_NOTSUPP, (int)nfsstatus);
case NFS4ERR_TOOSMALL:
return fsalstat(ERR_FSAL_TOOSMALL, (int)nfsstatus);
case NFS4ERR_SERVERFAULT:
return fsalstat(ERR_FSAL_SERVERFAULT, (int)nfsstatus);
case NFS4ERR_BADTYPE:
return fsalstat(ERR_FSAL_BADTYPE, (int)nfsstatus);
case NFS4ERR_GRACE:
case NFS4ERR_DELAY:
return fsalstat(ERR_FSAL_DELAY, (int)nfsstatus);
case NFS4ERR_FHEXPIRED:
return fsalstat(ERR_FSAL_FHEXPIRED, (int)nfsstatus);
case NFS4ERR_WRONGSEC:
return fsalstat(ERR_FSAL_SEC, (int)nfsstatus);
case NFS4ERR_SYMLINK:
return fsalstat(ERR_FSAL_SYMLINK, (int)nfsstatus);
case NFS4ERR_ATTRNOTSUPP:
return fsalstat(ERR_FSAL_ATTRNOTSUPP, (int)nfsstatus);
case NFS4ERR_BADNAME:
return fsalstat(ERR_FSAL_BADNAME, (int)nfsstatus);
case NFS4ERR_INVAL:
case NFS4ERR_CLID_INUSE:
case NFS4ERR_MOVED:
case NFS4ERR_RESOURCE:
case NFS4ERR_MINOR_VERS_MISMATCH:
case NFS4ERR_STALE_CLIENTID:
case NFS4ERR_STALE_STATEID:
case NFS4ERR_OLD_STATEID:
case NFS4ERR_BAD_STATEID:
case NFS4ERR_BAD_SEQID:
case NFS4ERR_RESTOREFH:
case NFS4ERR_LEASE_MOVED:
case NFS4ERR_NO_GRACE:
case NFS4ERR_RECLAIM_BAD:
case NFS4ERR_RECLAIM_CONFLICT:
case NFS4ERR_BADXDR:
case NFS4ERR_BADCHAR:
case NFS4ERR_BAD_RANGE:
case NFS4ERR_BADOWNER:
case NFS4ERR_OP_ILLEGAL:
case NFS4ERR_LOCKS_HELD:
case NFS4ERR_LOCK_NOTSUPP:
case NFS4ERR_DEADLOCK:
case NFS4ERR_ADMIN_REVOKED:
case NFS4ERR_CB_PATH_DOWN:
default:
return fsalstat(ERR_FSAL_INVAL, (int)nfsstatus);
}
}
#define PROXYV4_ATTR_BIT(b) (1U << b)
#define PROXYV4_ATTR_BIT2(b) (1U << (b - 32))
static struct bitmap4 proxyv4_bitmap_getattr = {
.map[0] =
(PROXYV4_ATTR_BIT(FATTR4_SUPPORTED_ATTRS) |
PROXYV4_ATTR_BIT(FATTR4_TYPE) | PROXYV4_ATTR_BIT(FATTR4_CHANGE) |
PROXYV4_ATTR_BIT(FATTR4_SIZE) | PROXYV4_ATTR_BIT(FATTR4_FSID) |
PROXYV4_ATTR_BIT(FATTR4_FILEID)),
.map[1] =
(PROXYV4_ATTR_BIT2(FATTR4_MODE) |
PROXYV4_ATTR_BIT2(FATTR4_NUMLINKS) |
PROXYV4_ATTR_BIT2(FATTR4_OWNER) |
PROXYV4_ATTR_BIT2(FATTR4_OWNER_GROUP) |
PROXYV4_ATTR_BIT2(FATTR4_SPACE_USED) |
PROXYV4_ATTR_BIT2(FATTR4_TIME_ACCESS) |
PROXYV4_ATTR_BIT2(FATTR4_TIME_METADATA) |
PROXYV4_ATTR_BIT2(FATTR4_TIME_MODIFY) |
PROXYV4_ATTR_BIT2(FATTR4_RAWDEV)),
.bitmap4_len = 2
};
static struct bitmap4 proxyv4_bitmap_fsinfo = {
.map[0] =
(PROXYV4_ATTR_BIT(FATTR4_FILES_AVAIL) |
PROXYV4_ATTR_BIT(FATTR4_FILES_FREE) |
PROXYV4_ATTR_BIT(FATTR4_FILES_TOTAL)),
.map[1] =
(PROXYV4_ATTR_BIT2(FATTR4_SPACE_AVAIL) |
PROXYV4_ATTR_BIT2(FATTR4_SPACE_FREE) |
PROXYV4_ATTR_BIT2(FATTR4_SPACE_TOTAL)),
.bitmap4_len = 2
};
static struct bitmap4 lease_bits = {
.map[0] = PROXYV4_ATTR_BIT(FATTR4_LEASE_TIME),
.bitmap4_len = 1
};
static struct bitmap4 proxyv4_bitmap_per_fs = {
.map[0] = (PROXYV4_ATTR_BIT(FATTR4_MAXREAD) |
PROXYV4_ATTR_BIT(FATTR4_MAXWRITE)),
.bitmap4_len = 1
};
#undef PROXYV4_ATTR_BIT
#undef PROXYV4_ATTR_BIT2
static struct {
attrmask_t mask;
int fattr_bit;
} fsal_mask2bit[] = {
{
ATTR_SIZE, FATTR4_SIZE}, {
ATTR_MODE, FATTR4_MODE}, {
ATTR_OWNER, FATTR4_OWNER}, {
ATTR_GROUP, FATTR4_OWNER_GROUP}, {
ATTR_ATIME, FATTR4_TIME_ACCESS_SET}, {
ATTR_ATIME_SERVER, FATTR4_TIME_ACCESS_SET}, {
ATTR_MTIME, FATTR4_TIME_MODIFY_SET}, {
ATTR_MTIME_SERVER, FATTR4_TIME_MODIFY_SET}, {
ATTR_CTIME, FATTR4_TIME_METADATA}
};
static struct bitmap4 empty_bitmap = {
.map[0] = 0,
.map[1] = 0,
.map[2] = 0,
.bitmap4_len = 2
};
static int
proxyv4_fsalattr_to_fattr4(const struct fsal_attrlist *attrs, fattr4 *data)
{
int i;
struct bitmap4 bmap = empty_bitmap;
struct xdr_attrs_args args;
for (i = 0; i < ARRAY_SIZE(fsal_mask2bit); i++) {
if (FSAL_TEST_MASK(attrs->valid_mask, fsal_mask2bit[i].mask)) {
if (fsal_mask2bit[i].fattr_bit > 31) {
bmap.map[1] |=
1U << (fsal_mask2bit[i].fattr_bit - 32);
bmap.bitmap4_len = 2;
} else {
bmap.map[0] |=
1U << fsal_mask2bit[i].fattr_bit;
}
}
}
memset(&args, 0, sizeof(args));
args.attrs = (struct fsal_attrlist *)attrs;
args.data = NULL;
return nfs4_FSALattr_To_Fattr(&args, &bmap, data);
}
static GETATTR4resok *
proxyv4_fill_getattr_reply(nfs_resop4 *resop, char *blob, size_t blob_sz)
{
GETATTR4resok *a = &resop->nfs_resop4_u.opgetattr.GETATTR4res_u.resok4;
a->obj_attributes.attrmask = empty_bitmap;
a->obj_attributes.attr_vals.attrlist4_val = blob;
a->obj_attributes.attr_vals.attrlist4_len = blob_sz;
return a;
}
static int proxyv4_got_rpc_reply(struct proxyv4_rpc_io_context *ctx,
int sock,
int sz,
u_int xid)
{
char *repbuf = ctx->recvbuf;
int size;
if (sz > ctx->recvbuf_sz)
return -E2BIG;
PTHREAD_MUTEX_lock(&ctx->iolock);
memcpy(repbuf, &xid, sizeof(xid));
/*
* sz includes 4 bytes of xid which have been processed
* together with record mark - reduce the read to avoid
* gobbing up next record mark.
*/
repbuf += 4;
ctx->ioresult = 4;
sz -= 4;
while (sz > 0) {
/* TODO: handle timeouts - use poll(2) */
int bc = read(sock, repbuf, sz);
if (bc <= 0) {
ctx->ioresult = -((bc < 0) ? errno : ETIMEDOUT);
break;
}
repbuf += bc;
ctx->ioresult += bc;
sz -= bc;
}
ctx->iodone = true;
size = ctx->ioresult;
pthread_cond_signal(&ctx->iowait);
PTHREAD_MUTEX_unlock(&ctx->iolock);
return size;
}
static int proxyv4_rpc_read_reply(struct proxyv4_export *proxyv4_exp)
{
struct {
uint recmark;
uint xid;
} h;
char *buf = (char *)&h;
struct glist_head *c;
char sink[256];
int cnt = 0;
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
while (cnt < 8) {
int bc = read(rpc->rpc_sock, buf + cnt, 8 - cnt);
if (bc < 0)
return -errno;
cnt += bc;
}
h.recmark = ntohl(h.recmark);
/* TODO: check for final fragment */
h.xid = ntohl(h.xid);
LogDebug(COMPONENT_FSAL, "Recmark %x, xid %u\n", h.recmark, h.xid);
h.recmark &= ~(1U << 31);
PTHREAD_MUTEX_lock(&rpc->listlock);
glist_for_each(c, &rpc->rpc_calls) {
struct proxyv4_rpc_io_context *ctx =
container_of(c, struct proxyv4_rpc_io_context, calls);
if (ctx->rpc_xid == h.xid) {
glist_del(c);
PTHREAD_MUTEX_unlock(&rpc->listlock);
return proxyv4_got_rpc_reply(ctx,
rpc->rpc_sock,
h.recmark, h.xid);
}
}
PTHREAD_MUTEX_unlock(&rpc->listlock);
cnt = h.recmark - 4;
LogDebug(COMPONENT_FSAL, "xid %u is not on the list, skip %d bytes\n",
h.xid, cnt);
while (cnt > 0) {
int rb = (cnt > sizeof(sink)) ? sizeof(sink) : cnt;
rb = read(rpc->rpc_sock, sink, rb);
if (rb <= 0)
return -errno;
cnt -= rb;
}
return 0;
}
/* called with listlock */
static void proxyv4_new_socket_ready(struct proxyv4_export *proxyv4_exp)
{
struct glist_head *nxt;
struct glist_head *c;
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
/* If there are any outstanding calls then tell them to resend */
glist_for_each_safe(c, nxt, &rpc->rpc_calls) {
struct proxyv4_rpc_io_context *ctx =
container_of(c, struct proxyv4_rpc_io_context, calls);
glist_del(c);
PTHREAD_MUTEX_lock(&ctx->iolock);
ctx->iodone = true;
ctx->ioresult = -EAGAIN;
pthread_cond_signal(&ctx->iowait);
PTHREAD_MUTEX_unlock(&ctx->iolock);
}
/* If there is anyone waiting for the socket then tell them
* it's ready */
pthread_cond_broadcast(&rpc->sockless);
}
/* called with listlock */
static int proxyv4_connect(struct proxyv4_export *proxyv4_exp,
sockaddr_t *dest, uint16_t port)
{
int sock;
int socklen;
switch (dest->ss_family) {
case AF_INET:
((struct sockaddr_in *)dest)->sin_port = htons(port);
socklen = sizeof(struct sockaddr_in);
break;
case AF_INET6:
((struct sockaddr_in6 *)dest)->sin6_port = htons(port);
socklen = sizeof(struct sockaddr_in6);
break;
default:
LogCrit(COMPONENT_FSAL, "Unknown address family %d",
dest->ss_family);
return -1;
}
if (proxyv4_exp->info.use_privileged_client_port) {
int priv_port = 0;
sock = rresvport_af(&priv_port, dest->ss_family);
if (sock < 0)
LogCrit(COMPONENT_FSAL,
"Cannot create TCP socket on privileged port");
} else {
sock = socket(dest->ss_family, SOCK_STREAM, IPPROTO_TCP);
if (sock < 0)
LogCrit(COMPONENT_FSAL, "Cannot create TCP socket - %d",
errno);
}
if (sock >= 0) {
if (connect(sock, (struct sockaddr *)dest, socklen) < 0) {
close(sock);
sock = -1;
} else {
proxyv4_new_socket_ready(proxyv4_exp);
}
}
return sock;
}
/*
* NB! rpc_sock can be closed by the sending thread but it will not be
* changing its value. Only this function will change rpc_sock which
* means that it can look at the value without holding the lock.
*/
static void *proxyv4_rpc_recv(void *arg)
{
struct proxyv4_export *proxyv4_exp = arg;
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
pthread_mutex_t *list_lock = &rpc->listlock;
struct pollfd pfd;
int millisec = proxyv4_exp->info.srv_timeout * 1000;
SetNameFunction("proxyv4_rcv_thread");
rcu_register_thread();
while (!rpc->close_thread) {
int nsleeps = 0;
PTHREAD_MUTEX_lock(list_lock);
do {
sockaddr_t *srv_addr =
&proxyv4_exp->info.srv_addr;
uint16_t srv_port =
proxyv4_exp->info.srv_port;
rpc->rpc_sock =
proxyv4_connect(proxyv4_exp,
srv_addr,
srv_port);
/* early stop test */
if (rpc->close_thread) {
PTHREAD_MUTEX_unlock(list_lock);
goto out;
}
if (rpc->rpc_sock < 0) {
if (nsleeps == 0) {
char addr[SOCK_NAME_MAX];
struct display_buffer dspbuf = {
sizeof(addr), addr, addr};
display_sockaddr(&dspbuf,
srv_addr);
LogCrit(COMPONENT_FSAL,
"Cannot connect to server %s:%u",
addr, srv_port);
}
PTHREAD_MUTEX_unlock(list_lock);
sleep(proxyv4_exp->info.retry_sleeptime);
nsleeps++;
PTHREAD_MUTEX_lock(list_lock);
} else {
LogDebug(COMPONENT_FSAL,
"Connected after %d sleeps, resending outstanding calls",
nsleeps);
}
} while (rpc->rpc_sock < 0 &&
!rpc->close_thread);
PTHREAD_MUTEX_unlock(list_lock);
/* early stop test */
if (rpc->close_thread)
goto out;
pfd.fd = rpc->rpc_sock;
pfd.events = POLLIN | POLLRDHUP;
while (rpc->rpc_sock >= 0) {
switch (poll(&pfd, 1, millisec)) {
case 0:
LogDebug(COMPONENT_FSAL,
"Timeout, wait again...");
continue;
case -1:
break;
default:
if (pfd.revents & POLLRDHUP) {
LogEvent(COMPONENT_FSAL,
"Other end has closed connection, reconnecting...");
} else if (pfd.revents & POLLNVAL) {
LogEvent(COMPONENT_FSAL,
"Socket is closed");
}
if (proxyv4_rpc_read_reply(proxyv4_exp) >= 0)
continue;
break;
}
PTHREAD_MUTEX_lock(list_lock);
close(rpc->rpc_sock);
rpc->rpc_sock = -1;
PTHREAD_MUTEX_unlock(list_lock);
}
}
out:
rcu_unregister_thread();
return NULL;
}
static enum clnt_stat proxyv4_process_reply(struct proxyv4_rpc_io_context *ctx,
COMPOUND4res *res)
{
enum clnt_stat rc = RPC_CANTRECV;
struct timespec ts;
PTHREAD_MUTEX_lock(&ctx->iolock);
ts.tv_sec = time(NULL) + 60;
ts.tv_nsec = 0;
while (!ctx->iodone) {
int w = pthread_cond_timedwait(&ctx->iowait, &ctx->iolock, &ts);
if (w == ETIMEDOUT) {
PTHREAD_MUTEX_unlock(&ctx->iolock);
return RPC_TIMEDOUT;
}
}
ctx->iodone = false;
PTHREAD_MUTEX_unlock(&ctx->iolock);
if (ctx->ioresult > 0) {
struct rpc_msg reply;
XDR x;
memset(&reply, 0, sizeof(reply));
reply.RPCM_ack.ar_results.proc =
(xdrproc_t) xdr_COMPOUND4res;
reply.RPCM_ack.ar_results.where = res;
memset(&x, 0, sizeof(x));
xdrmem_create(&x, ctx->recvbuf, ctx->ioresult, XDR_DECODE);
/* macro is defined, GCC 4.7.2 ignoring */
if (xdr_replymsg(&x, &reply)) {
if (reply.rm_reply.rp_stat == MSG_ACCEPTED) {
switch (reply.rm_reply.rp_acpt.ar_stat) {
case SUCCESS:
rc = RPC_SUCCESS;
break;
case PROG_UNAVAIL:
rc = RPC_PROGUNAVAIL;
break;
case PROG_MISMATCH:
rc = RPC_PROGVERSMISMATCH;
break;
case PROC_UNAVAIL:
rc = RPC_PROCUNAVAIL;
break;
case GARBAGE_ARGS:
rc = RPC_CANTDECODEARGS;
break;
case SYSTEM_ERR:
rc = RPC_SYSTEMERROR;
break;
default:
rc = RPC_FAILED;
break;
}
} else {
switch (reply.rm_reply.rp_rjct.rj_stat) {
case RPC_MISMATCH:
rc = RPC_VERSMISMATCH;
break;
case AUTH_ERROR:
rc = RPC_AUTHERROR;
break;
default:
rc = RPC_FAILED;
break;
}
}
} else {
rc = RPC_CANTDECODERES;
}
reply.RPCM_ack.ar_results.proc = (xdrproc_t) xdr_void;
reply.RPCM_ack.ar_results.where = NULL;
xdr_free((xdrproc_t) xdr_replymsg, &reply);
}
return rc;
}
static inline int proxyv4_rpc_need_sock(struct proxyv4_export *proxyv4_exp)
{
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
PTHREAD_MUTEX_lock(&rpc->listlock);
while (rpc->rpc_sock < 0 && !rpc->close_thread)
pthread_cond_wait(&rpc->sockless,
&rpc->listlock);
PTHREAD_MUTEX_unlock(&rpc->listlock);
return rpc->close_thread;
}
static inline int proxyv4_rpc_renewer_wait(int timeout,
struct proxyv4_export *proxyv4_exp)
{
struct timespec ts;
int rc;
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
PTHREAD_MUTEX_lock(&rpc->listlock);
ts.tv_sec = time(NULL) + timeout;
ts.tv_nsec = 0;
rc = pthread_cond_timedwait(&rpc->sockless,
&rpc->listlock, &ts);
PTHREAD_MUTEX_unlock(&rpc->listlock);
return (rc == ETIMEDOUT);
}
static int proxyv4_compoundv4_call(struct proxyv4_rpc_io_context *pcontext,
const struct user_cred *cred,
COMPOUND4args *args, COMPOUND4res *res,
struct proxyv4_export *proxyv4_exp)
{
XDR x;
struct rpc_msg rmsg;
AUTH *au;
enum clnt_stat rc;
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
PTHREAD_MUTEX_lock(&rpc->listlock);
rmsg.rm_xid = rpc->rpc_xid++;
PTHREAD_MUTEX_unlock(&rpc->listlock);
rmsg.rm_direction = CALL;
rmsg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
rmsg.cb_prog = pcontext->nfs_prog;
rmsg.cb_vers = FSAL_PROXY_NFS_V4;
rmsg.cb_proc = NFSPROC4_COMPOUND;
if (cred) {
au = authunix_ncreate(rpc->proxyv4_hostname,
cred->caller_uid, cred->caller_gid,
cred->caller_glen, cred->caller_garray);
} else {
au = authunix_ncreate_default();
}
if (AUTH_FAILURE(au)) {
char *err = rpc_sperror(&au->ah_error, "failed");
LogDebug(COMPONENT_FSAL, "%s", err);
gsh_free(err);
AUTH_DESTROY(au);
return RPC_AUTHERROR;
}
rmsg.cb_cred = au->ah_cred;
rmsg.cb_verf = au->ah_verf;
memset(&x, 0, sizeof(x));
xdrmem_create(&x, pcontext->sendbuf + 4, pcontext->sendbuf_sz,
XDR_ENCODE);
if (xdr_callmsg(&x, &rmsg) && xdr_COMPOUND4args(&x, args)) {
u_int pos = xdr_getpos(&x);
u_int recmark = ntohl(pos | (1U << 31));
int first_try = 1;
pcontext->rpc_xid = rmsg.rm_xid;
memcpy(pcontext->sendbuf, &recmark, sizeof(recmark));
pos += 4;
do {
int bc = 0;
char *buf = pcontext->sendbuf;
LogDebug(COMPONENT_FSAL, "%ssend XID %u with %d bytes",
(first_try ? "First attempt to " : "Re"),
rmsg.rm_xid, pos);
PTHREAD_MUTEX_lock(&rpc->listlock);
while (bc < pos) {
int wc = write(rpc->rpc_sock, buf, pos - bc);
if (wc <= 0) {
close(rpc->rpc_sock);
break;
}
bc += wc;
buf += wc;
}
if (bc == pos) {
if (first_try) {
glist_add_tail(&rpc->rpc_calls,
&pcontext->calls);
first_try = 0;
}
} else {
if (!first_try)
glist_del(&pcontext->calls);
}
PTHREAD_MUTEX_unlock(&rpc->listlock);
if (bc == pos)
rc = proxyv4_process_reply(pcontext, res);
else
rc = RPC_CANTSEND;
} while (rc == RPC_TIMEDOUT);
} else {
rc = RPC_CANTENCODEARGS;
}
auth_destroy(au);
return rc;
}
int proxyv4_compoundv4_execute(const char *caller,
const struct user_cred *creds,
uint32_t cnt, nfs_argop4 *argoparray,
nfs_resop4 *resoparray,
struct proxyv4_export *proxyv4_exp)
{
enum clnt_stat rc;
struct proxyv4_rpc_io_context *ctx;
COMPOUND4args arg = {
.minorversion = FSAL_PROXY_NFS_V4_MINOR,
.argarray.argarray_val = argoparray,
.argarray.argarray_len = cnt
};
COMPOUND4res res = {
.resarray.resarray_val = resoparray,
.resarray.resarray_len = cnt
};
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
PTHREAD_MUTEX_lock(&rpc->context_lock);
while (glist_empty(&rpc->free_contexts))
pthread_cond_wait(&rpc->need_context,
&rpc->context_lock);
ctx =
glist_first_entry(&rpc->free_contexts,
struct proxyv4_rpc_io_context, calls);
glist_del(&ctx->calls);
PTHREAD_MUTEX_unlock(&rpc->context_lock);
/* fill slotid and sequenceid */
if (argoparray->argop == NFS4_OP_SEQUENCE) {
SEQUENCE4args *opsequence =
&argoparray->nfs_argop4_u.opsequence;
/* set slotid */
opsequence->sa_slotid = ctx->slotid;
/* increment and set sequence id */
opsequence->sa_sequenceid = ++ctx->seqid;
}
do {
rc = proxyv4_compoundv4_call(ctx, creds, &arg,
&res, proxyv4_exp);
if (rc != RPC_SUCCESS)
LogDebug(COMPONENT_FSAL, "%s failed with %d", caller,
rc);
if (rc == RPC_CANTSEND)
if (proxyv4_rpc_need_sock(proxyv4_exp))
return -1;
} while ((rc == RPC_CANTRECV && (ctx->ioresult == -EAGAIN))
|| (rc == RPC_CANTSEND));
PTHREAD_MUTEX_lock(&rpc->context_lock);
pthread_cond_signal(&rpc->need_context);
glist_add(&rpc->free_contexts, &ctx->calls);
PTHREAD_MUTEX_unlock(&rpc->context_lock);
if (rc == RPC_SUCCESS)
return res.status;
return rc;
}
static inline int
proxyv4_nfsv4_call(const struct user_cred *creds, uint32_t cnt,
nfs_argop4 *args, nfs_resop4 *resp)
{
struct proxyv4_export *proxyv4_exp =
container_of(op_ctx->fsal_export,
struct proxyv4_export, exp);
return proxyv4_compoundv4_execute(__func__, creds, cnt, args, resp,
proxyv4_exp);
}
static inline void
proxyv4_get_clientid(struct proxyv4_export *proxyv4_exp, clientid4 *ret)
{
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
PTHREAD_MUTEX_lock(&rpc->proxyv4_clientid_mutex);
*ret = rpc->proxyv4_clientid;
PTHREAD_MUTEX_unlock(&rpc->proxyv4_clientid_mutex);
}
static inline void proxyv4_get_client_sessionid(sessionid4 ret)
{
struct proxyv4_export *proxyv4_exp =
container_of(op_ctx->fsal_export,
struct proxyv4_export, exp);
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
PTHREAD_MUTEX_lock(&rpc->proxyv4_clientid_mutex);
while (rpc->no_sessionid)
pthread_cond_wait(&rpc->cond_sessionid,
&rpc->proxyv4_clientid_mutex);
memcpy(ret, rpc->proxyv4_client_sessionid, sizeof(sessionid4));
PTHREAD_MUTEX_unlock(&rpc->proxyv4_clientid_mutex);
}
static inline void
proxyv4_get_client_sessionid_export(sessionid4 ret,
struct proxyv4_export *proxyv4_exp)
{
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
PTHREAD_MUTEX_lock(&rpc->proxyv4_clientid_mutex);
while (rpc->no_sessionid)
pthread_cond_wait(&rpc->cond_sessionid,
&rpc->proxyv4_clientid_mutex);
memcpy(ret, rpc->proxyv4_client_sessionid, sizeof(sessionid4));
PTHREAD_MUTEX_unlock(&rpc->proxyv4_clientid_mutex);
}
static inline void proxyv4_get_client_seqid(struct proxyv4_export *proxyv4_exp,
sequenceid4 *ret)
{
struct proxyv4_export_rpc *rpc = &proxyv4_exp->rpc;
PTHREAD_MUTEX_lock(&rpc->proxyv4_clientid_mutex);
*ret = rpc->proxyv4_client_seqid;
PTHREAD_MUTEX_unlock(&rpc->proxyv4_clientid_mutex);
}
/**
* Confirm proxyv4_clientid to set a new session.
*
* @param[out] new_sessionid The new session id
* @param[out] new_lease_time Lease time from the background NFSv4.1 server
*
* @return 0 on success or NFS error code
*/
static int proxyv4_setsessionid(sessionid4 new_sessionid, uint32_t *lease_time,
struct proxyv4_export *proxyv4_exp)
{
int rc;
int opcnt = 0;
/* CREATE_SESSION to set session id */
/* SEQUENCE RECLAIM_COMPLETE PUTROOTFH GETATTR to get lease time */
#define FSAL_SESSIONID_NB_OP_ALLOC 4
nfs_argop4 arg[FSAL_SESSIONID_NB_OP_ALLOC];
nfs_resop4 res[FSAL_SESSIONID_NB_OP_ALLOC];
clientid4 cid;
sequenceid4 seqid;
CREATE_SESSION4res *s_res;
CREATE_SESSION4resok *res_ok;