--- /dev/null
+/*
+ * Server-side XDR for NFSv4
+ *
+ * Copyright (c) 2002 The Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Kendrick Smith <kmsmith@umich.edu>
+ * Andy Adamson <andros@umich.edu>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/slab.h>
+#include <linux/namei.h>
+#include <linux/statfs.h>
+#include <linux/utsname.h>
+#include <linux/pagemap.h>
+#include <linux/sunrpc/svcauth_gss.h>
+
+#include "idmap.h"
+#include "acl.h"
+#include "xdr4.h"
+#include "vfs.h"
+#include "state.h"
+#include "cache.h"
+#include "netns.h"
+#include "pnfs.h"
+
+#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
+#include <linux/security.h>
+#endif
+
+
+#define NFSDDBG_FACILITY NFSDDBG_XDR
+
+/*
+ * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
+ * directory in order to indicate to the client that a filesystem boundary is present
+ * We use a fixed fsid for a referral
+ */
+#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
+#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
+
+static __be32
+check_filename(char *str, int len)
+{
+ int i;
+
+ if (len == 0)
+ return nfserr_inval;
+ if (isdotent(str, len))
+ return nfserr_badname;
+ for (i = 0; i < len; i++)
+ if (str[i] == '/')
+ return nfserr_badname;
+ return 0;
+}
+
+#define DECODE_HEAD \
+ __be32 *p; \
+ __be32 status
+#define DECODE_TAIL \
+ status = 0; \
+out: \
+ return status; \
+xdr_error: \
+ dprintk("NFSD: xdr error (%s:%d)\n", \
+ __FILE__, __LINE__); \
+ status = nfserr_bad_xdr; \
+ goto out
+
+#define READMEM(x,nbytes) do { \
+ x = (char *)p; \
+ p += XDR_QUADLEN(nbytes); \
+} while (0)
+#define SAVEMEM(x,nbytes) do { \
+ if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
+ savemem(argp, p, nbytes) : \
+ (char *)p)) { \
+ dprintk("NFSD: xdr error (%s:%d)\n", \
+ __FILE__, __LINE__); \
+ goto xdr_error; \
+ } \
+ p += XDR_QUADLEN(nbytes); \
+} while (0)
+#define COPYMEM(x,nbytes) do { \
+ memcpy((x), p, nbytes); \
+ p += XDR_QUADLEN(nbytes); \
+} while (0)
+
+/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
+#define READ_BUF(nbytes) do { \
+ if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
+ p = argp->p; \
+ argp->p += XDR_QUADLEN(nbytes); \
+ } else if (!(p = read_buf(argp, nbytes))) { \
+ dprintk("NFSD: xdr error (%s:%d)\n", \
+ __FILE__, __LINE__); \
+ goto xdr_error; \
+ } \
+} while (0)
+
+static void next_decode_page(struct nfsd4_compoundargs *argp)
+{
+ argp->p = page_address(argp->pagelist[0]);
+ argp->pagelist++;
+ if (argp->pagelen < PAGE_SIZE) {
+ argp->end = argp->p + (argp->pagelen>>2);
+ argp->pagelen = 0;
+ } else {
+ argp->end = argp->p + (PAGE_SIZE>>2);
+ argp->pagelen -= PAGE_SIZE;
+ }
+}
+
+static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
+{
+ /* We want more bytes than seem to be available.
+ * Maybe we need a new page, maybe we have just run out
+ */
+ unsigned int avail = (char *)argp->end - (char *)argp->p;
+ __be32 *p;
+ if (avail + argp->pagelen < nbytes)
+ return NULL;
+ if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
+ return NULL;
+ /* ok, we can do it with the current plus the next page */
+ if (nbytes <= sizeof(argp->tmp))
+ p = argp->tmp;
+ else {
+ kfree(argp->tmpp);
+ p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
+ if (!p)
+ return NULL;
+
+ }
+ /*
+ * The following memcpy is safe because read_buf is always
+ * called with nbytes > avail, and the two cases above both
+ * guarantee p points to at least nbytes bytes.
+ */
+ memcpy(p, argp->p, avail);
+ next_decode_page(argp);
+ memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
+ argp->p += XDR_QUADLEN(nbytes - avail);
+ return p;
+}
+
+static int zero_clientid(clientid_t *clid)
+{
+ return (clid->cl_boot == 0) && (clid->cl_id == 0);
+}
+
+/**
+ * svcxdr_tmpalloc - allocate memory to be freed after compound processing
+ * @argp: NFSv4 compound argument structure
+ * @p: pointer to be freed (with kfree())
+ *
+ * Marks @p to be freed when processing the compound operation
+ * described in @argp finishes.
+ */
+static void *
+svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
+{
+ struct svcxdr_tmpbuf *tb;
+
+ tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
+ if (!tb)
+ return NULL;
+ tb->next = argp->to_free;
+ argp->to_free = tb;
+ return tb->buf;
+}
+
+/*
+ * For xdr strings that need to be passed to other kernel api's
+ * as null-terminated strings.
+ *
+ * Note null-terminating in place usually isn't safe since the
+ * buffer might end on a page boundary.
+ */
+static char *
+svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
+{
+ char *p = svcxdr_tmpalloc(argp, len + 1);
+
+ if (!p)
+ return NULL;
+ memcpy(p, buf, len);
+ p[len] = '\0';
+ return p;
+}
+
+/**
+ * savemem - duplicate a chunk of memory for later processing
+ * @argp: NFSv4 compound argument structure to be freed with
+ * @p: pointer to be duplicated
+ * @nbytes: length to be duplicated
+ *
+ * Returns a pointer to a copy of @nbytes bytes of memory at @p
+ * that are preserved until processing of the NFSv4 compound
+ * operation described by @argp finishes.
+ */
+static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
+{
+ void *ret;
+
+ ret = svcxdr_tmpalloc(argp, nbytes);
+ if (!ret)
+ return NULL;
+ memcpy(ret, p, nbytes);
+ return ret;
+}
+
+/*
+ * We require the high 32 bits of 'seconds' to be 0, and
+ * we ignore all 32 bits of 'nseconds'.
+ */
+static __be32
+nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
+{
+ DECODE_HEAD;
+ u64 sec;
+
+ READ_BUF(12);
+ p = xdr_decode_hyper(p, &sec);
+ tv->tv_sec = sec;
+ tv->tv_nsec = be32_to_cpup(p++);
+ if (tv->tv_nsec >= (u32)1000000000)
+ return nfserr_inval;
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
+{
+ u32 bmlen;
+ DECODE_HEAD;
+
+ bmval[0] = 0;
+ bmval[1] = 0;
+ bmval[2] = 0;
+
+ READ_BUF(4);
+ bmlen = be32_to_cpup(p++);
+ if (bmlen > 1000)
+ goto xdr_error;
+
+ READ_BUF(bmlen << 2);
+ if (bmlen > 0)
+ bmval[0] = be32_to_cpup(p++);
+ if (bmlen > 1)
+ bmval[1] = be32_to_cpup(p++);
+ if (bmlen > 2)
+ bmval[2] = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
+ struct iattr *iattr, struct nfs4_acl **acl,
+ struct xdr_netobj *label)
+{
+ int expected_len, len = 0;
+ u32 dummy32;
+ char *buf;
+
+ DECODE_HEAD;
+ iattr->ia_valid = 0;
+ if ((status = nfsd4_decode_bitmap(argp, bmval)))
+ return status;
+
+ READ_BUF(4);
+ expected_len = be32_to_cpup(p++);
+
+ if (bmval[0] & FATTR4_WORD0_SIZE) {
+ READ_BUF(8);
+ len += 8;
+ p = xdr_decode_hyper(p, &iattr->ia_size);
+ iattr->ia_valid |= ATTR_SIZE;
+ }
+ if (bmval[0] & FATTR4_WORD0_ACL) {
+ u32 nace;
+ struct nfs4_ace *ace;
+
+ READ_BUF(4); len += 4;
+ nace = be32_to_cpup(p++);
+
+ if (nace > NFS4_ACL_MAX)
+ return nfserr_fbig;
+
+ *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
+ if (*acl == NULL)
+ return nfserr_jukebox;
+
+ (*acl)->naces = nace;
+ for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
+ READ_BUF(16); len += 16;
+ ace->type = be32_to_cpup(p++);
+ ace->flag = be32_to_cpup(p++);
+ ace->access_mask = be32_to_cpup(p++);
+ dummy32 = be32_to_cpup(p++);
+ READ_BUF(dummy32);
+ len += XDR_QUADLEN(dummy32) << 2;
+ READMEM(buf, dummy32);
+ ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
+ status = nfs_ok;
+ if (ace->whotype != NFS4_ACL_WHO_NAMED)
+ ;
+ else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
+ status = nfsd_map_name_to_gid(argp->rqstp,
+ buf, dummy32, &ace->who_gid);
+ else
+ status = nfsd_map_name_to_uid(argp->rqstp,
+ buf, dummy32, &ace->who_uid);
+ if (status)
+ return status;
+ }
+ } else
+ *acl = NULL;
+ if (bmval[1] & FATTR4_WORD1_MODE) {
+ READ_BUF(4);
+ len += 4;
+ iattr->ia_mode = be32_to_cpup(p++);
+ iattr->ia_mode &= (S_IFMT | S_IALLUGO);
+ iattr->ia_valid |= ATTR_MODE;
+ }
+ if (bmval[1] & FATTR4_WORD1_OWNER) {
+ READ_BUF(4);
+ len += 4;
+ dummy32 = be32_to_cpup(p++);
+ READ_BUF(dummy32);
+ len += (XDR_QUADLEN(dummy32) << 2);
+ READMEM(buf, dummy32);
+ if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
+ return status;
+ iattr->ia_valid |= ATTR_UID;
+ }
+ if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
+ READ_BUF(4);
+ len += 4;
+ dummy32 = be32_to_cpup(p++);
+ READ_BUF(dummy32);
+ len += (XDR_QUADLEN(dummy32) << 2);
+ READMEM(buf, dummy32);
+ if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
+ return status;
+ iattr->ia_valid |= ATTR_GID;
+ }
+ if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
+ READ_BUF(4);
+ len += 4;
+ dummy32 = be32_to_cpup(p++);
+ switch (dummy32) {
+ case NFS4_SET_TO_CLIENT_TIME:
+ len += 12;
+ status = nfsd4_decode_time(argp, &iattr->ia_atime);
+ if (status)
+ return status;
+ iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
+ break;
+ case NFS4_SET_TO_SERVER_TIME:
+ iattr->ia_valid |= ATTR_ATIME;
+ break;
+ default:
+ goto xdr_error;
+ }
+ }
+ if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
+ READ_BUF(4);
+ len += 4;
+ dummy32 = be32_to_cpup(p++);
+ switch (dummy32) {
+ case NFS4_SET_TO_CLIENT_TIME:
+ len += 12;
+ status = nfsd4_decode_time(argp, &iattr->ia_mtime);
+ if (status)
+ return status;
+ iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
+ break;
+ case NFS4_SET_TO_SERVER_TIME:
+ iattr->ia_valid |= ATTR_MTIME;
+ break;
+ default:
+ goto xdr_error;
+ }
+ }
+
+ label->len = 0;
+#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
+ if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
+ READ_BUF(4);
+ len += 4;
+ dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
+ READ_BUF(4);
+ len += 4;
+ dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
+ READ_BUF(4);
+ len += 4;
+ dummy32 = be32_to_cpup(p++);
+ READ_BUF(dummy32);
+ if (dummy32 > NFS4_MAXLABELLEN)
+ return nfserr_badlabel;
+ len += (XDR_QUADLEN(dummy32) << 2);
+ READMEM(buf, dummy32);
+ label->len = dummy32;
+ label->data = svcxdr_dupstr(argp, buf, dummy32);
+ if (!label->data)
+ return nfserr_jukebox;
+ }
+#endif
+
+ if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
+ || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
+ || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
+ READ_BUF(expected_len - len);
+ else if (len != expected_len)
+ goto xdr_error;
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
+{
+ DECODE_HEAD;
+
+ READ_BUF(sizeof(stateid_t));
+ sid->si_generation = be32_to_cpup(p++);
+ COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ access->ac_req_access = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
+{
+ DECODE_HEAD;
+ u32 dummy, uid, gid;
+ char *machine_name;
+ int i;
+ int nr_secflavs;
+
+ /* callback_sec_params4 */
+ READ_BUF(4);
+ nr_secflavs = be32_to_cpup(p++);
+ if (nr_secflavs)
+ cbs->flavor = (u32)(-1);
+ else
+ /* Is this legal? Be generous, take it to mean AUTH_NONE: */
+ cbs->flavor = 0;
+ for (i = 0; i < nr_secflavs; ++i) {
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ switch (dummy) {
+ case RPC_AUTH_NULL:
+ /* Nothing to read */
+ if (cbs->flavor == (u32)(-1))
+ cbs->flavor = RPC_AUTH_NULL;
+ break;
+ case RPC_AUTH_UNIX:
+ READ_BUF(8);
+ /* stamp */
+ dummy = be32_to_cpup(p++);
+
+ /* machine name */
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy);
+ SAVEMEM(machine_name, dummy);
+
+ /* uid, gid */
+ READ_BUF(8);
+ uid = be32_to_cpup(p++);
+ gid = be32_to_cpup(p++);
+
+ /* more gids */
+ READ_BUF(4);
+ 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);
+ if (uid_valid(kuid) && gid_valid(kgid)) {
+ cbs->uid = kuid;
+ cbs->gid = kgid;
+ cbs->flavor = RPC_AUTH_UNIX;
+ } else {
+ dprintk("RPC_AUTH_UNIX with invalid"
+ "uid or gid ignoring!\n");
+ }
+ }
+ break;
+ case RPC_AUTH_GSS:
+ dprintk("RPC_AUTH_GSS callback secflavor "
+ "not supported!\n");
+ READ_BUF(8);
+ /* gcbp_service */
+ dummy = be32_to_cpup(p++);
+ /* gcbp_handle_from_server */
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+ /* gcbp_handle_from_client */
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy);
+ break;
+ default:
+ dprintk("Illegal callback secflavor\n");
+ return nfserr_inval;
+ }
+ }
+ DECODE_TAIL;
+}
+
+static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ bc->bc_cb_program = be32_to_cpup(p++);
+ nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
+
+ DECODE_TAIL;
+}
+
+static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
+{
+ DECODE_HEAD;
+
+ READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
+ COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
+ bcts->dir = be32_to_cpup(p++);
+ /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
+ * could help us figure out we should be using it. */
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ close->cl_seqid = be32_to_cpup(p++);
+ return nfsd4_decode_stateid(argp, &close->cl_stateid);
+
+ DECODE_TAIL;
+}
+
+
+static __be32
+nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
+{
+ DECODE_HEAD;
+
+ READ_BUF(12);
+ p = xdr_decode_hyper(p, &commit->co_offset);
+ commit->co_count = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ create->cr_type = be32_to_cpup(p++);
+ switch (create->cr_type) {
+ case NF4LNK:
+ READ_BUF(4);
+ create->cr_datalen = be32_to_cpup(p++);
+ READ_BUF(create->cr_datalen);
+ create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
+ if (!create->cr_data)
+ return nfserr_jukebox;
+ break;
+ case NF4BLK:
+ case NF4CHR:
+ READ_BUF(8);
+ create->cr_specdata1 = be32_to_cpup(p++);
+ create->cr_specdata2 = be32_to_cpup(p++);
+ break;
+ case NF4SOCK:
+ case NF4FIFO:
+ case NF4DIR:
+ default:
+ break;
+ }
+
+ READ_BUF(4);
+ create->cr_namelen = be32_to_cpup(p++);
+ READ_BUF(create->cr_namelen);
+ SAVEMEM(create->cr_name, create->cr_namelen);
+ if ((status = check_filename(create->cr_name, create->cr_namelen)))
+ return status;
+
+ status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
+ &create->cr_acl, &create->cr_label);
+ if (status)
+ goto out;
+
+ DECODE_TAIL;
+}
+
+static inline __be32
+nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
+{
+ return nfsd4_decode_stateid(argp, &dr->dr_stateid);
+}
+
+static inline __be32
+nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
+{
+ return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
+}
+
+static __be32
+nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ link->li_namelen = be32_to_cpup(p++);
+ READ_BUF(link->li_namelen);
+ SAVEMEM(link->li_name, link->li_namelen);
+ if ((status = check_filename(link->li_name, link->li_namelen)))
+ return status;
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
+{
+ DECODE_HEAD;
+
+ /*
+ * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
+ */
+ READ_BUF(28);
+ lock->lk_type = be32_to_cpup(p++);
+ if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
+ goto xdr_error;
+ lock->lk_reclaim = be32_to_cpup(p++);
+ p = xdr_decode_hyper(p, &lock->lk_offset);
+ p = xdr_decode_hyper(p, &lock->lk_length);
+ lock->lk_is_new = be32_to_cpup(p++);
+
+ if (lock->lk_is_new) {
+ READ_BUF(4);
+ lock->lk_new_open_seqid = be32_to_cpup(p++);
+ status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
+ if (status)
+ return status;
+ READ_BUF(8 + sizeof(clientid_t));
+ lock->lk_new_lock_seqid = be32_to_cpup(p++);
+ COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
+ lock->lk_new_owner.len = be32_to_cpup(p++);
+ READ_BUF(lock->lk_new_owner.len);
+ READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
+ } else {
+ status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
+ if (status)
+ return status;
+ READ_BUF(4);
+ lock->lk_old_lock_seqid = be32_to_cpup(p++);
+ }
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
+{
+ DECODE_HEAD;
+
+ READ_BUF(32);
+ lockt->lt_type = be32_to_cpup(p++);
+ if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
+ goto xdr_error;
+ p = xdr_decode_hyper(p, &lockt->lt_offset);
+ p = xdr_decode_hyper(p, &lockt->lt_length);
+ COPYMEM(&lockt->lt_clientid, 8);
+ lockt->lt_owner.len = be32_to_cpup(p++);
+ READ_BUF(lockt->lt_owner.len);
+ READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
+{
+ DECODE_HEAD;
+
+ READ_BUF(8);
+ locku->lu_type = be32_to_cpup(p++);
+ if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
+ goto xdr_error;
+ locku->lu_seqid = be32_to_cpup(p++);
+ status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
+ if (status)
+ return status;
+ READ_BUF(16);
+ p = xdr_decode_hyper(p, &locku->lu_offset);
+ p = xdr_decode_hyper(p, &locku->lu_length);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ lookup->lo_len = be32_to_cpup(p++);
+ READ_BUF(lookup->lo_len);
+ SAVEMEM(lookup->lo_name, lookup->lo_len);
+ if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
+ return status;
+
+ DECODE_TAIL;
+}
+
+static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
+{
+ __be32 *p;
+ u32 w;
+
+ READ_BUF(4);
+ w = be32_to_cpup(p++);
+ *share_access = w & NFS4_SHARE_ACCESS_MASK;
+ *deleg_want = w & NFS4_SHARE_WANT_MASK;
+ if (deleg_when)
+ *deleg_when = w & NFS4_SHARE_WHEN_MASK;
+
+ switch (w & NFS4_SHARE_ACCESS_MASK) {
+ case NFS4_SHARE_ACCESS_READ:
+ case NFS4_SHARE_ACCESS_WRITE:
+ case NFS4_SHARE_ACCESS_BOTH:
+ break;
+ default:
+ return nfserr_bad_xdr;
+ }
+ w &= ~NFS4_SHARE_ACCESS_MASK;
+ if (!w)
+ return nfs_ok;
+ if (!argp->minorversion)
+ return nfserr_bad_xdr;
+ switch (w & NFS4_SHARE_WANT_MASK) {
+ case NFS4_SHARE_WANT_NO_PREFERENCE:
+ case NFS4_SHARE_WANT_READ_DELEG:
+ case NFS4_SHARE_WANT_WRITE_DELEG:
+ case NFS4_SHARE_WANT_ANY_DELEG:
+ case NFS4_SHARE_WANT_NO_DELEG:
+ case NFS4_SHARE_WANT_CANCEL:
+ break;
+ default:
+ return nfserr_bad_xdr;
+ }
+ w &= ~NFS4_SHARE_WANT_MASK;
+ if (!w)
+ return nfs_ok;
+
+ if (!deleg_when) /* open_downgrade */
+ return nfserr_inval;
+ switch (w) {
+ case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
+ case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
+ case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
+ NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
+ return nfs_ok;
+ }
+xdr_error:
+ return nfserr_bad_xdr;
+}
+
+static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
+{
+ __be32 *p;
+
+ READ_BUF(4);
+ *x = be32_to_cpup(p++);
+ /* Note: unlinke access bits, deny bits may be zero. */
+ if (*x & ~NFS4_SHARE_DENY_BOTH)
+ return nfserr_bad_xdr;
+ return nfs_ok;
+xdr_error:
+ return nfserr_bad_xdr;
+}
+
+static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
+{
+ __be32 *p;
+
+ READ_BUF(4);
+ o->len = be32_to_cpup(p++);
+
+ if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
+ return nfserr_bad_xdr;
+
+ READ_BUF(o->len);
+ SAVEMEM(o->data, o->len);
+ return nfs_ok;
+xdr_error:
+ return nfserr_bad_xdr;
+}
+
+static __be32
+nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
+{
+ DECODE_HEAD;
+ u32 dummy;
+
+ memset(open->op_bmval, 0, sizeof(open->op_bmval));
+ open->op_iattr.ia_valid = 0;
+ open->op_openowner = NULL;
+
+ open->op_xdr_error = 0;
+ /* seqid, share_access, share_deny, clientid, ownerlen */
+ READ_BUF(4);
+ open->op_seqid = be32_to_cpup(p++);
+ /* decode, yet ignore deleg_when until supported */
+ status = nfsd4_decode_share_access(argp, &open->op_share_access,
+ &open->op_deleg_want, &dummy);
+ if (status)
+ goto xdr_error;
+ status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
+ if (status)
+ goto xdr_error;
+ READ_BUF(sizeof(clientid_t));
+ COPYMEM(&open->op_clientid, sizeof(clientid_t));
+ status = nfsd4_decode_opaque(argp, &open->op_owner);
+ if (status)
+ goto xdr_error;
+ READ_BUF(4);
+ open->op_create = be32_to_cpup(p++);
+ switch (open->op_create) {
+ case NFS4_OPEN_NOCREATE:
+ break;
+ case NFS4_OPEN_CREATE:
+ READ_BUF(4);
+ open->op_createmode = be32_to_cpup(p++);
+ switch (open->op_createmode) {
+ case NFS4_CREATE_UNCHECKED:
+ case NFS4_CREATE_GUARDED:
+ status = nfsd4_decode_fattr(argp, open->op_bmval,
+ &open->op_iattr, &open->op_acl, &open->op_label);
+ if (status)
+ goto out;
+ break;
+ case NFS4_CREATE_EXCLUSIVE:
+ READ_BUF(NFS4_VERIFIER_SIZE);
+ COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
+ break;
+ case NFS4_CREATE_EXCLUSIVE4_1:
+ if (argp->minorversion < 1)
+ goto xdr_error;
+ READ_BUF(NFS4_VERIFIER_SIZE);
+ COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
+ status = nfsd4_decode_fattr(argp, open->op_bmval,
+ &open->op_iattr, &open->op_acl, &open->op_label);
+ if (status)
+ goto out;
+ break;
+ default:
+ goto xdr_error;
+ }
+ break;
+ default:
+ goto xdr_error;
+ }
+
+ /* open_claim */
+ READ_BUF(4);
+ open->op_claim_type = be32_to_cpup(p++);
+ switch (open->op_claim_type) {
+ case NFS4_OPEN_CLAIM_NULL:
+ case NFS4_OPEN_CLAIM_DELEGATE_PREV:
+ READ_BUF(4);
+ open->op_fname.len = be32_to_cpup(p++);
+ READ_BUF(open->op_fname.len);
+ SAVEMEM(open->op_fname.data, open->op_fname.len);
+ if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
+ return status;
+ break;
+ case NFS4_OPEN_CLAIM_PREVIOUS:
+ READ_BUF(4);
+ open->op_delegate_type = be32_to_cpup(p++);
+ break;
+ case NFS4_OPEN_CLAIM_DELEGATE_CUR:
+ status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
+ if (status)
+ return status;
+ READ_BUF(4);
+ open->op_fname.len = be32_to_cpup(p++);
+ READ_BUF(open->op_fname.len);
+ SAVEMEM(open->op_fname.data, open->op_fname.len);
+ if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
+ return status;
+ break;
+ case NFS4_OPEN_CLAIM_FH:
+ case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
+ if (argp->minorversion < 1)
+ goto xdr_error;
+ /* void */
+ break;
+ case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
+ if (argp->minorversion < 1)
+ goto xdr_error;
+ status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
+ if (status)
+ return status;
+ break;
+ default:
+ goto xdr_error;
+ }
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
+{
+ DECODE_HEAD;
+
+ if (argp->minorversion >= 1)
+ return nfserr_notsupp;
+
+ status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
+ if (status)
+ return status;
+ READ_BUF(4);
+ open_conf->oc_seqid = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
+{
+ DECODE_HEAD;
+
+ status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
+ if (status)
+ return status;
+ READ_BUF(4);
+ open_down->od_seqid = be32_to_cpup(p++);
+ status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
+ &open_down->od_deleg_want, NULL);
+ if (status)
+ return status;
+ status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
+ if (status)
+ return status;
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ putfh->pf_fhlen = be32_to_cpup(p++);
+ if (putfh->pf_fhlen > NFS4_FHSIZE)
+ goto xdr_error;
+ READ_BUF(putfh->pf_fhlen);
+ SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
+{
+ if (argp->minorversion == 0)
+ return nfs_ok;
+ return nfserr_notsupp;
+}
+
+static __be32
+nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
+{
+ DECODE_HEAD;
+
+ status = nfsd4_decode_stateid(argp, &read->rd_stateid);
+ if (status)
+ return status;
+ READ_BUF(12);
+ p = xdr_decode_hyper(p, &read->rd_offset);
+ read->rd_length = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
+{
+ DECODE_HEAD;
+
+ READ_BUF(24);
+ p = xdr_decode_hyper(p, &readdir->rd_cookie);
+ COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
+ readdir->rd_dircount = be32_to_cpup(p++);
+ readdir->rd_maxcount = be32_to_cpup(p++);
+ if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
+ goto out;
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ remove->rm_namelen = be32_to_cpup(p++);
+ READ_BUF(remove->rm_namelen);
+ SAVEMEM(remove->rm_name, remove->rm_namelen);
+ if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
+ return status;
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ rename->rn_snamelen = be32_to_cpup(p++);
+ READ_BUF(rename->rn_snamelen + 4);
+ SAVEMEM(rename->rn_sname, rename->rn_snamelen);
+ rename->rn_tnamelen = be32_to_cpup(p++);
+ READ_BUF(rename->rn_tnamelen);
+ SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
+ if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
+ return status;
+ if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
+ return status;
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
+{
+ DECODE_HEAD;
+
+ if (argp->minorversion >= 1)
+ return nfserr_notsupp;
+
+ READ_BUF(sizeof(clientid_t));
+ COPYMEM(clientid, sizeof(clientid_t));
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
+ struct nfsd4_secinfo *secinfo)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ secinfo->si_namelen = be32_to_cpup(p++);
+ READ_BUF(secinfo->si_namelen);
+ SAVEMEM(secinfo->si_name, secinfo->si_namelen);
+ status = check_filename(secinfo->si_name, secinfo->si_namelen);
+ if (status)
+ return status;
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
+ struct nfsd4_secinfo_no_name *sin)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ sin->sin_style = be32_to_cpup(p++);
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
+{
+ __be32 status;
+
+ status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
+ if (status)
+ return status;
+ return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
+ &setattr->sa_acl, &setattr->sa_label);
+}
+
+static __be32
+nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
+{
+ DECODE_HEAD;
+
+ if (argp->minorversion >= 1)
+ return nfserr_notsupp;
+
+ READ_BUF(NFS4_VERIFIER_SIZE);
+ COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
+
+ status = nfsd4_decode_opaque(argp, &setclientid->se_name);
+ if (status)
+ return nfserr_bad_xdr;
+ READ_BUF(8);
+ setclientid->se_callback_prog = be32_to_cpup(p++);
+ setclientid->se_callback_netid_len = be32_to_cpup(p++);
+
+ READ_BUF(setclientid->se_callback_netid_len + 4);
+ SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
+ setclientid->se_callback_addr_len = be32_to_cpup(p++);
+
+ READ_BUF(setclientid->se_callback_addr_len + 4);
+ SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
+ setclientid->se_callback_ident = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
+{
+ DECODE_HEAD;
+
+ if (argp->minorversion >= 1)
+ return nfserr_notsupp;
+
+ READ_BUF(8 + NFS4_VERIFIER_SIZE);
+ COPYMEM(&scd_c->sc_clientid, 8);
+ COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
+
+ DECODE_TAIL;
+}
+
+/* Also used for NVERIFY */
+static __be32
+nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
+{
+ DECODE_HEAD;
+
+ if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
+ goto out;
+
+ /* For convenience's sake, we compare raw xdr'd attributes in
+ * nfsd4_proc_verify */
+
+ READ_BUF(4);
+ verify->ve_attrlen = be32_to_cpup(p++);
+ READ_BUF(verify->ve_attrlen);
+ SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
+{
+ int avail;
+ int len;
+ DECODE_HEAD;
+
+ status = nfsd4_decode_stateid(argp, &write->wr_stateid);
+ if (status)
+ return status;
+ READ_BUF(16);
+ p = xdr_decode_hyper(p, &write->wr_offset);
+ write->wr_stable_how = be32_to_cpup(p++);
+ if (write->wr_stable_how > 2)
+ goto xdr_error;
+ write->wr_buflen = be32_to_cpup(p++);
+
+ /* Sorry .. no magic macros for this.. *
+ * READ_BUF(write->wr_buflen);
+ * SAVEMEM(write->wr_buf, write->wr_buflen);
+ */
+ avail = (char*)argp->end - (char*)argp->p;
+ if (avail + argp->pagelen < write->wr_buflen) {
+ dprintk("NFSD: xdr error (%s:%d)\n",
+ __FILE__, __LINE__);
+ goto xdr_error;
+ }
+ write->wr_head.iov_base = p;
+ write->wr_head.iov_len = avail;
+ write->wr_pagelist = argp->pagelist;
+
+ len = XDR_QUADLEN(write->wr_buflen) << 2;
+ if (len >= avail) {
+ int pages;
+
+ len -= avail;
+
+ pages = len >> PAGE_SHIFT;
+ argp->pagelist += pages;
+ argp->pagelen -= pages * PAGE_SIZE;
+ len -= pages * PAGE_SIZE;
+
+ argp->p = (__be32 *)page_address(argp->pagelist[0]);
+ argp->pagelist++;
+ argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
+ }
+ argp->p += XDR_QUADLEN(len);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
+{
+ DECODE_HEAD;
+
+ if (argp->minorversion >= 1)
+ return nfserr_notsupp;
+
+ READ_BUF(12);
+ COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
+ rlockowner->rl_owner.len = be32_to_cpup(p++);
+ READ_BUF(rlockowner->rl_owner.len);
+ READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
+
+ if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
+ return nfserr_inval;
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
+ struct nfsd4_exchange_id *exid)
+{
+ int dummy, tmp;
+ DECODE_HEAD;
+
+ READ_BUF(NFS4_VERIFIER_SIZE);
+ COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
+
+ status = nfsd4_decode_opaque(argp, &exid->clname);
+ if (status)
+ return nfserr_bad_xdr;
+
+ READ_BUF(4);
+ exid->flags = be32_to_cpup(p++);
+
+ /* Ignore state_protect4_a */
+ READ_BUF(4);
+ exid->spa_how = be32_to_cpup(p++);
+ switch (exid->spa_how) {
+ case SP4_NONE:
+ break;
+ case SP4_MACH_CRED:
+ /* spo_must_enforce */
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy * 4);
+ p += dummy;
+
+ /* spo_must_allow */
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy * 4);
+ p += dummy;
+ break;
+ case SP4_SSV:
+ /* ssp_ops */
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy * 4);
+ p += dummy;
+
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy * 4);
+ p += dummy;
+
+ /* ssp_hash_algs<> */
+ READ_BUF(4);
+ tmp = be32_to_cpup(p++);
+ while (tmp--) {
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+ }
+
+ /* ssp_encr_algs<> */
+ READ_BUF(4);
+ tmp = be32_to_cpup(p++);
+ while (tmp--) {
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+ }
+
+ /* ssp_window and ssp_num_gss_handles */
+ READ_BUF(8);
+ dummy = be32_to_cpup(p++);
+ dummy = be32_to_cpup(p++);
+ break;
+ default:
+ goto xdr_error;
+ }
+
+ /* Ignore Implementation ID */
+ READ_BUF(4); /* nfs_impl_id4 array length */
+ dummy = be32_to_cpup(p++);
+
+ if (dummy > 1)
+ goto xdr_error;
+
+ if (dummy == 1) {
+ /* nii_domain */
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+
+ /* nii_name */
+ READ_BUF(4);
+ dummy = be32_to_cpup(p++);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+
+ /* nii_date */
+ READ_BUF(12);
+ p += 3;
+ }
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
+ struct nfsd4_create_session *sess)
+{
+ DECODE_HEAD;
+ u32 dummy;
+
+ READ_BUF(16);
+ COPYMEM(&sess->clientid, 8);
+ sess->seqid = be32_to_cpup(p++);
+ sess->flags = be32_to_cpup(p++);
+
+ /* Fore channel attrs */
+ READ_BUF(28);
+ dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
+ sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
+ sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
+ sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
+ sess->fore_channel.maxops = be32_to_cpup(p++);
+ sess->fore_channel.maxreqs = be32_to_cpup(p++);
+ sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
+ if (sess->fore_channel.nr_rdma_attrs == 1) {
+ READ_BUF(4);
+ sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
+ } else if (sess->fore_channel.nr_rdma_attrs > 1) {
+ dprintk("Too many fore channel attr bitmaps!\n");
+ goto xdr_error;
+ }
+
+ /* Back channel attrs */
+ READ_BUF(28);
+ dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
+ sess->back_channel.maxreq_sz = be32_to_cpup(p++);
+ sess->back_channel.maxresp_sz = be32_to_cpup(p++);
+ sess->back_channel.maxresp_cached = be32_to_cpup(p++);
+ sess->back_channel.maxops = be32_to_cpup(p++);
+ sess->back_channel.maxreqs = be32_to_cpup(p++);
+ sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
+ if (sess->back_channel.nr_rdma_attrs == 1) {
+ READ_BUF(4);
+ sess->back_channel.rdma_attrs = be32_to_cpup(p++);
+ } else if (sess->back_channel.nr_rdma_attrs > 1) {
+ dprintk("Too many back channel attr bitmaps!\n");
+ goto xdr_error;
+ }
+
+ READ_BUF(4);
+ sess->callback_prog = be32_to_cpup(p++);
+ nfsd4_decode_cb_sec(argp, &sess->cb_sec);
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
+ struct nfsd4_destroy_session *destroy_session)
+{
+ DECODE_HEAD;
+ READ_BUF(NFS4_MAX_SESSIONID_LEN);
+ COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
+ struct nfsd4_free_stateid *free_stateid)
+{
+ DECODE_HEAD;
+
+ READ_BUF(sizeof(stateid_t));
+ free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
+ COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
+ struct nfsd4_sequence *seq)
+{
+ DECODE_HEAD;
+
+ READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
+ COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
+ seq->seqid = be32_to_cpup(p++);
+ seq->slotid = be32_to_cpup(p++);
+ seq->maxslots = be32_to_cpup(p++);
+ seq->cachethis = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
+{
+ int i;
+ __be32 *p, status;
+ struct nfsd4_test_stateid_id *stateid;
+
+ READ_BUF(4);
+ test_stateid->ts_num_ids = ntohl(*p++);
+
+ INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
+
+ for (i = 0; i < test_stateid->ts_num_ids; i++) {
+ stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
+ if (!stateid) {
+ status = nfserrno(-ENOMEM);
+ goto out;
+ }
+
+ INIT_LIST_HEAD(&stateid->ts_id_list);
+ list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
+
+ status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
+ if (status)
+ goto out;
+ }
+
+ status = 0;
+out:
+ return status;
+xdr_error:
+ dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
+ status = nfserr_bad_xdr;
+ goto out;
+}
+
+static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
+{
+ DECODE_HEAD;
+
+ READ_BUF(8);
+ COPYMEM(&dc->clientid, 8);
+
+ DECODE_TAIL;
+}
+
+static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ rc->rca_one_fs = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+#ifdef CONFIG_NFSD_PNFS
+static __be32
+nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
+ struct nfsd4_getdeviceinfo *gdev)
+{
+ DECODE_HEAD;
+ u32 num, i;
+
+ READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
+ COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
+ gdev->gd_layout_type = be32_to_cpup(p++);
+ gdev->gd_maxcount = be32_to_cpup(p++);
+ num = be32_to_cpup(p++);
+ if (num) {
+ READ_BUF(4 * num);
+ gdev->gd_notify_types = be32_to_cpup(p++);
+ for (i = 1; i < num; i++) {
+ if (be32_to_cpup(p++)) {
+ status = nfserr_inval;
+ goto out;
+ }
+ }
+ }
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
+ struct nfsd4_layoutget *lgp)
+{
+ DECODE_HEAD;
+
+ READ_BUF(36);
+ lgp->lg_signal = be32_to_cpup(p++);
+ lgp->lg_layout_type = be32_to_cpup(p++);
+ lgp->lg_seg.iomode = be32_to_cpup(p++);
+ p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
+ p = xdr_decode_hyper(p, &lgp->lg_seg.length);
+ p = xdr_decode_hyper(p, &lgp->lg_minlength);
+
+ status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
+ if (status)
+ return status;
+
+ READ_BUF(4);
+ lgp->lg_maxcount = be32_to_cpup(p++);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
+ struct nfsd4_layoutcommit *lcp)
+{
+ DECODE_HEAD;
+ u32 timechange;
+
+ READ_BUF(20);
+ p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
+ p = xdr_decode_hyper(p, &lcp->lc_seg.length);
+ lcp->lc_reclaim = be32_to_cpup(p++);
+
+ status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
+ if (status)
+ return status;
+
+ READ_BUF(4);
+ lcp->lc_newoffset = be32_to_cpup(p++);
+ if (lcp->lc_newoffset) {
+ READ_BUF(8);
+ p = xdr_decode_hyper(p, &lcp->lc_last_wr);
+ } else
+ lcp->lc_last_wr = 0;
+ READ_BUF(4);
+ timechange = be32_to_cpup(p++);
+ if (timechange) {
+ status = nfsd4_decode_time(argp, &lcp->lc_mtime);
+ if (status)
+ return status;
+ } else {
+ lcp->lc_mtime.tv_nsec = UTIME_NOW;
+ }
+ READ_BUF(8);
+ lcp->lc_layout_type = be32_to_cpup(p++);
+
+ /*
+ * Save the layout update in XDR format and let the layout driver deal
+ * with it later.
+ */
+ lcp->lc_up_len = be32_to_cpup(p++);
+ if (lcp->lc_up_len > 0) {
+ READ_BUF(lcp->lc_up_len);
+ READMEM(lcp->lc_up_layout, lcp->lc_up_len);
+ }
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
+ struct nfsd4_layoutreturn *lrp)
+{
+ DECODE_HEAD;
+
+ READ_BUF(16);
+ lrp->lr_reclaim = be32_to_cpup(p++);
+ lrp->lr_layout_type = be32_to_cpup(p++);
+ lrp->lr_seg.iomode = be32_to_cpup(p++);
+ lrp->lr_return_type = be32_to_cpup(p++);
+ if (lrp->lr_return_type == RETURN_FILE) {
+ READ_BUF(16);
+ p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
+ p = xdr_decode_hyper(p, &lrp->lr_seg.length);
+
+ status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
+ if (status)
+ return status;
+
+ READ_BUF(4);
+ lrp->lrf_body_len = be32_to_cpup(p++);
+ if (lrp->lrf_body_len > 0) {
+ READ_BUF(lrp->lrf_body_len);
+ READMEM(lrp->lrf_body, lrp->lrf_body_len);
+ }
+ } else {
+ lrp->lr_seg.offset = 0;
+ lrp->lr_seg.length = NFS4_MAX_UINT64;
+ }
+
+ DECODE_TAIL;
+}
+#endif /* CONFIG_NFSD_PNFS */
+
+static __be32
+nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
+ struct nfsd4_fallocate *fallocate)
+{
+ DECODE_HEAD;
+
+ status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
+ if (status)
+ return status;
+
+ READ_BUF(16);
+ p = xdr_decode_hyper(p, &fallocate->falloc_offset);
+ xdr_decode_hyper(p, &fallocate->falloc_length);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
+{
+ DECODE_HEAD;
+
+ status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
+ if (status)
+ return status;
+
+ READ_BUF(8 + 4);
+ p = xdr_decode_hyper(p, &seek->seek_offset);
+ seek->seek_whence = be32_to_cpup(p);
+
+ DECODE_TAIL;
+}
+
+static __be32
+nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
+{
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
+{
+ return nfserr_notsupp;
+}
+
+typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
+
+static nfsd4_dec nfsd4_dec_ops[] = {
+ [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
+ [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
+ [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
+ [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
+ [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
+ [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
+ [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
+ [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
+ [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
+ [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
+ [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
+ [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
+ [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
+ [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
+ [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
+ [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
+ [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
+ [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
+ [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
+ [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
+ [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
+ [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
+ [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
+ [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
+ [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
+ [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
+ [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
+ [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
+ [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
+ [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
+ [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
+ [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
+ [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
+ [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
+ [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
+
+ /* new operations for NFSv4.1 */
+ [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
+ [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
+ [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
+ [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
+ [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
+ [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
+ [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
+#ifdef CONFIG_NFSD_PNFS
+ [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
+ [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
+ [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
+ [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
+#else
+ [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
+#endif
+ [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
+ [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
+ [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
+ [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
+ [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
+
+ /* new operations for NFSv4.2 */
+ [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
+ [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
+ [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
+ [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
+};
+
+static inline bool
+nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
+{
+ if (op->opnum < FIRST_NFS4_OP)
+ return false;
+ else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
+ return false;
+ else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
+ return false;
+ else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
+ return false;
+ return true;
+}
+
+static __be32
+nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
+{
+ DECODE_HEAD;
+ struct nfsd4_op *op;
+ bool cachethis = false;
+ int auth_slack= argp->rqstp->rq_auth_slack;
+ int max_reply = auth_slack + 8; /* opcnt, status */
+ int readcount = 0;
+ int readbytes = 0;
+ int i;
+
+ READ_BUF(4);
+ argp->taglen = be32_to_cpup(p++);
+ READ_BUF(argp->taglen + 8);
+ SAVEMEM(argp->tag, argp->taglen);
+ argp->minorversion = be32_to_cpup(p++);
+ argp->opcnt = be32_to_cpup(p++);
+ max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
+
+ if (argp->taglen > NFSD4_MAX_TAGLEN)
+ goto xdr_error;
+ if (argp->opcnt > 100)
+ goto xdr_error;
+
+ if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
+ argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
+ if (!argp->ops) {
+ argp->ops = argp->iops;
+ dprintk("nfsd: couldn't allocate room for COMPOUND\n");
+ goto xdr_error;
+ }
+ }
+
+ if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
+ argp->opcnt = 0;
+
+ for (i = 0; i < argp->opcnt; i++) {
+ op = &argp->ops[i];
+ op->replay = NULL;
+
+ READ_BUF(4);
+ op->opnum = be32_to_cpup(p++);
+
+ if (nfsd4_opnum_in_range(argp, op))
+ op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
+ else {
+ op->opnum = OP_ILLEGAL;
+ op->status = nfserr_op_illegal;
+ }
+ /*
+ * We'll try to cache the result in the DRC if any one
+ * op in the compound wants to be cached:
+ */
+ cachethis |= nfsd4_cache_this_op(op);
+
+ if (op->opnum == OP_READ) {
+ readcount++;
+ readbytes += nfsd4_max_reply(argp->rqstp, op);
+ } else
+ max_reply += nfsd4_max_reply(argp->rqstp, op);
+ /*
+ * OP_LOCK may return a conflicting lock. (Special case
+ * because it will just skip encoding this if it runs
+ * out of xdr buffer space, and it is the only operation
+ * that behaves this way.)
+ */
+ if (op->opnum == OP_LOCK)
+ max_reply += NFS4_OPAQUE_LIMIT;
+
+ if (op->status) {
+ argp->opcnt = i+1;
+ break;
+ }
+ }
+ /* Sessions make the DRC unnecessary: */
+ if (argp->minorversion)
+ cachethis = false;
+ svc_reserve(argp->rqstp, max_reply + readbytes);
+ argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
+
+ if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
+ clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
+
+ DECODE_TAIL;
+}
+
+static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
+{
+ if (IS_I_VERSION(inode)) {
+ p = xdr_encode_hyper(p, inode->i_version);
+ } else {
+ *p++ = cpu_to_be32(stat->ctime.tv_sec);
+ *p++ = cpu_to_be32(stat->ctime.tv_nsec);
+ }
+ return p;
+}
+
+static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
+{
+ *p++ = cpu_to_be32(c->atomic);
+ if (c->change_supported) {
+ p = xdr_encode_hyper(p, c->before_change);
+ p = xdr_encode_hyper(p, c->after_change);
+ } else {
+ *p++ = cpu_to_be32(c->before_ctime_sec);
+ *p++ = cpu_to_be32(c->before_ctime_nsec);
+ *p++ = cpu_to_be32(c->after_ctime_sec);
+ *p++ = cpu_to_be32(c->after_ctime_nsec);
+ }
+ return p;
+}
+
+/* Encode as an array of strings the string given with components
+ * separated @sep, escaped with esc_enter and esc_exit.
+ */
+static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
+ char *components, char esc_enter,
+ char esc_exit)
+{
+ __be32 *p;
+ __be32 pathlen;
+ int pathlen_offset;
+ int strlen, count=0;
+ char *str, *end, *next;
+
+ dprintk("nfsd4_encode_components(%s)\n", components);
+
+ pathlen_offset = xdr->buf->len;
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ return nfserr_resource;
+ p++; /* We will fill this in with @count later */
+
+ end = str = components;
+ while (*end) {
+ bool found_esc = false;
+
+ /* try to parse as esc_start, ..., esc_end, sep */
+ if (*str == esc_enter) {
+ for (; *end && (*end != esc_exit); end++)
+ /* find esc_exit or end of string */;
+ next = end + 1;
+ if (*end && (!*next || *next == sep)) {
+ str++;
+ found_esc = true;
+ }
+ }
+
+ if (!found_esc)
+ for (; *end && (*end != sep); end++)
+ /* find sep or end of string */;
+
+ strlen = end - str;
+ if (strlen) {
+ p = xdr_reserve_space(xdr, strlen + 4);
+ if (!p)
+ return nfserr_resource;
+ p = xdr_encode_opaque(p, str, strlen);
+ count++;
+ }
+ else
+ end++;
+ if (found_esc)
+ end = next;
+
+ str = end;
+ }
+ pathlen = htonl(count);
+ write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
+ return 0;
+}
+
+/* Encode as an array of strings the string given with components
+ * separated @sep.
+ */
+static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
+ char *components)
+{
+ return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
+}
+
+/*
+ * encode a location element of a fs_locations structure
+ */
+static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
+ struct nfsd4_fs_location *location)
+{
+ __be32 status;
+
+ status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
+ '[', ']');
+ if (status)
+ return status;
+ status = nfsd4_encode_components(xdr, '/', location->path);
+ if (status)
+ return status;
+ return 0;
+}
+
+/*
+ * Encode a path in RFC3530 'pathname4' format
+ */
+static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
+ const struct path *root,
+ const struct path *path)
+{
+ struct path cur = *path;
+ __be32 *p;
+ struct dentry **components = NULL;
+ unsigned int ncomponents = 0;
+ __be32 err = nfserr_jukebox;
+
+ dprintk("nfsd4_encode_components(");
+
+ path_get(&cur);
+ /* First walk the path up to the nfsd root, and store the
+ * dentries/path components in an array.
+ */
+ for (;;) {
+ if (path_equal(&cur, root))
+ break;
+ if (cur.dentry == cur.mnt->mnt_root) {
+ if (follow_up(&cur))
+ continue;
+ goto out_free;
+ }
+ if ((ncomponents & 15) == 0) {
+ struct dentry **new;
+ new = krealloc(components,
+ sizeof(*new) * (ncomponents + 16),
+ GFP_KERNEL);
+ if (!new)
+ goto out_free;
+ components = new;
+ }
+ components[ncomponents++] = cur.dentry;
+ cur.dentry = dget_parent(cur.dentry);
+ }
+ err = nfserr_resource;
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_free;
+ *p++ = cpu_to_be32(ncomponents);
+
+ while (ncomponents) {
+ struct dentry *dentry = components[ncomponents - 1];
+ unsigned int len;
+
+ spin_lock(&dentry->d_lock);
+ len = dentry->d_name.len;
+ p = xdr_reserve_space(xdr, len + 4);
+ if (!p) {
+ spin_unlock(&dentry->d_lock);
+ goto out_free;
+ }
+ p = xdr_encode_opaque(p, dentry->d_name.name, len);
+ dprintk("/%pd", dentry);
+ spin_unlock(&dentry->d_lock);
+ dput(dentry);
+ ncomponents--;
+ }
+
+ err = 0;
+out_free:
+ dprintk(")\n");
+ while (ncomponents)
+ dput(components[--ncomponents]);
+ kfree(components);
+ path_put(&cur);
+ return err;
+}
+
+static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
+ struct svc_rqst *rqstp, const struct path *path)
+{
+ struct svc_export *exp_ps;
+ __be32 res;
+
+ exp_ps = rqst_find_fsidzero_export(rqstp);
+ if (IS_ERR(exp_ps))
+ return nfserrno(PTR_ERR(exp_ps));
+ res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
+ exp_put(exp_ps);
+ return res;
+}
+
+/*
+ * encode a fs_locations structure
+ */
+static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
+ struct svc_rqst *rqstp, struct svc_export *exp)
+{
+ __be32 status;
+ int i;
+ __be32 *p;
+ struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
+
+ status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
+ if (status)
+ return status;
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(fslocs->locations_count);
+ for (i=0; i<fslocs->locations_count; i++) {
+ status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
+ if (status)
+ return status;
+ }
+ return 0;
+}
+
+static u32 nfs4_file_type(umode_t mode)
+{
+ switch (mode & S_IFMT) {
+ case S_IFIFO: return NF4FIFO;
+ case S_IFCHR: return NF4CHR;
+ case S_IFDIR: return NF4DIR;
+ case S_IFBLK: return NF4BLK;
+ case S_IFLNK: return NF4LNK;
+ case S_IFREG: return NF4REG;
+ case S_IFSOCK: return NF4SOCK;
+ default: return NF4BAD;
+ };
+}
+
+static inline __be32
+nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
+ struct nfs4_ace *ace)
+{
+ if (ace->whotype != NFS4_ACL_WHO_NAMED)
+ return nfs4_acl_write_who(xdr, ace->whotype);
+ else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
+ return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
+ else
+ return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
+}
+
+#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
+ FATTR4_WORD0_RDATTR_ERROR)
+#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
+
+#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
+static inline __be32
+nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
+ void *context, int len)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
+ if (!p)
+ return nfserr_resource;
+
+ /*
+ * For now we use a 0 here to indicate the null translation; in
+ * the future we may place a call to translation code here.
+ */
+ *p++ = cpu_to_be32(0); /* lfs */
+ *p++ = cpu_to_be32(0); /* pi */
+ p = xdr_encode_opaque(p, context, len);
+ return 0;
+}
+#else
+static inline __be32
+nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
+ void *context, int len)
+{ return 0; }
+#endif
+
+static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
+{
+ /* As per referral draft: */
+ if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
+ *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
+ if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
+ *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
+ *rdattr_err = NFSERR_MOVED;
+ else
+ return nfserr_moved;
+ }
+ *bmval0 &= WORD0_ABSENT_FS_ATTRS;
+ *bmval1 &= WORD1_ABSENT_FS_ATTRS;
+ return 0;
+}
+
+
+static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
+{
+ struct path path = exp->ex_path;
+ int err;
+
+ path_get(&path);
+ while (follow_up(&path)) {
+ if (path.dentry != path.mnt->mnt_root)
+ break;
+ }
+ err = vfs_getattr(&path, stat);
+ path_put(&path);
+ return err;
+}
+
+/*
+ * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
+ * ourselves.
+ */
+static __be32
+nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
+ struct svc_export *exp,
+ struct dentry *dentry, u32 *bmval,
+ struct svc_rqst *rqstp, int ignore_crossmnt)
+{
+ u32 bmval0 = bmval[0];
+ u32 bmval1 = bmval[1];
+ u32 bmval2 = bmval[2];
+ struct kstat stat;
+ struct svc_fh *tempfh = NULL;
+ struct kstatfs statfs;
+ __be32 *p;
+ int starting_len = xdr->buf->len;
+ int attrlen_offset;
+ __be32 attrlen;
+ u32 dummy;
+ u64 dummy64;
+ u32 rdattr_err = 0;
+ __be32 status;
+ int err;
+ int aclsupport = 0;
+ struct nfs4_acl *acl = NULL;
+ void *context = NULL;
+ int contextlen;
+ bool contextsupport = false;
+ struct nfsd4_compoundres *resp = rqstp->rq_resp;
+ u32 minorversion = resp->cstate.minorversion;
+ struct path path = {
+ .mnt = exp->ex_path.mnt,
+ .dentry = dentry,
+ };
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+
+ BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
+ BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
+ BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
+ BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
+
+ if (exp->ex_fslocs.migrated) {
+ BUG_ON(bmval[2]);
+ status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
+ if (status)
+ goto out;
+ }
+
+ err = vfs_getattr(&path, &stat);
+ if (err)
+ goto out_nfserr;
+ if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
+ FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
+ (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
+ FATTR4_WORD1_SPACE_TOTAL))) {
+ err = vfs_statfs(&path, &statfs);
+ if (err)
+ goto out_nfserr;
+ }
+ if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
+ tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
+ status = nfserr_jukebox;
+ if (!tempfh)
+ goto out;
+ fh_init(tempfh, NFS4_FHSIZE);
+ status = fh_compose(tempfh, exp, dentry, NULL);
+ if (status)
+ goto out;
+ fhp = tempfh;
+ }
+ if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
+ | FATTR4_WORD0_SUPPORTED_ATTRS)) {
+ err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
+ aclsupport = (err == 0);
+ if (bmval0 & FATTR4_WORD0_ACL) {
+ if (err == -EOPNOTSUPP)
+ bmval0 &= ~FATTR4_WORD0_ACL;
+ else if (err == -EINVAL) {
+ status = nfserr_attrnotsupp;
+ goto out;
+ } else if (err != 0)
+ goto out_nfserr;
+ }
+ }
+
+#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
+ if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
+ bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
+ err = security_inode_getsecctx(d_inode(dentry),
+ &context, &contextlen);
+ contextsupport = (err == 0);
+ if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
+ if (err == -EOPNOTSUPP)
+ bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
+ else if (err)
+ goto out_nfserr;
+ }
+ }
+#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
+
+ if (bmval2) {
+ p = xdr_reserve_space(xdr, 16);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(3);
+ *p++ = cpu_to_be32(bmval0);
+ *p++ = cpu_to_be32(bmval1);
+ *p++ = cpu_to_be32(bmval2);
+ } else if (bmval1) {
+ p = xdr_reserve_space(xdr, 12);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(2);
+ *p++ = cpu_to_be32(bmval0);
+ *p++ = cpu_to_be32(bmval1);
+ } else {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(1);
+ *p++ = cpu_to_be32(bmval0);
+ }
+
+ attrlen_offset = xdr->buf->len;
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ p++; /* to be backfilled later */
+
+ if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
+ u32 word0 = nfsd_suppattrs0(minorversion);
+ u32 word1 = nfsd_suppattrs1(minorversion);
+ u32 word2 = nfsd_suppattrs2(minorversion);
+
+ if (!aclsupport)
+ word0 &= ~FATTR4_WORD0_ACL;
+ if (!contextsupport)
+ word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
+ if (!word2) {
+ p = xdr_reserve_space(xdr, 12);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(2);
+ *p++ = cpu_to_be32(word0);
+ *p++ = cpu_to_be32(word1);
+ } else {
+ p = xdr_reserve_space(xdr, 16);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(3);
+ *p++ = cpu_to_be32(word0);
+ *p++ = cpu_to_be32(word1);
+ *p++ = cpu_to_be32(word2);
+ }
+ }
+ if (bmval0 & FATTR4_WORD0_TYPE) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ dummy = nfs4_file_type(stat.mode);
+ if (dummy == NF4BAD) {
+ status = nfserr_serverfault;
+ goto out;
+ }
+ *p++ = cpu_to_be32(dummy);
+ }
+ if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
+ *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
+ else
+ *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
+ NFS4_FH_VOL_RENAME);
+ }
+ if (bmval0 & FATTR4_WORD0_CHANGE) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ p = encode_change(p, &stat, d_inode(dentry));
+ }
+ if (bmval0 & FATTR4_WORD0_SIZE) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, stat.size);
+ }
+ if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(0);
+ }
+ if (bmval0 & FATTR4_WORD0_FSID) {
+ p = xdr_reserve_space(xdr, 16);
+ if (!p)
+ goto out_resource;
+ if (exp->ex_fslocs.migrated) {
+ p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
+ p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
+ } else switch(fsid_source(fhp)) {
+ case FSIDSOURCE_FSID:
+ p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
+ p = xdr_encode_hyper(p, (u64)0);
+ break;
+ case FSIDSOURCE_DEV:
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(MAJOR(stat.dev));
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(MINOR(stat.dev));
+ break;
+ case FSIDSOURCE_UUID:
+ p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
+ EX_UUID_LEN);
+ break;
+ }
+ }
+ if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(0);
+ }
+ if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(nn->nfsd4_lease);
+ }
+ if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(rdattr_err);
+ }
+ if (bmval0 & FATTR4_WORD0_ACL) {
+ struct nfs4_ace *ace;
+
+ if (acl == NULL) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+
+ *p++ = cpu_to_be32(0);
+ goto out_acl;
+ }
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(acl->naces);
+
+ for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
+ p = xdr_reserve_space(xdr, 4*3);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(ace->type);
+ *p++ = cpu_to_be32(ace->flag);
+ *p++ = cpu_to_be32(ace->access_mask &
+ NFS4_ACE_MASK_ALL);
+ status = nfsd4_encode_aclname(xdr, rqstp, ace);
+ if (status)
+ goto out;
+ }
+ }
+out_acl:
+ if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(aclsupport ?
+ ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
+ }
+ if (bmval0 & FATTR4_WORD0_CANSETTIME) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(0);
+ }
+ if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
+ p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
+ fhp->fh_handle.fh_size);
+ }
+ if (bmval0 & FATTR4_WORD0_FILEID) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, stat.ino);
+ }
+ if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
+ }
+ if (bmval0 & FATTR4_WORD0_FILES_FREE) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
+ }
+ if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, (u64) statfs.f_files);
+ }
+ if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
+ status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
+ if (status)
+ goto out;
+ }
+ if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
+ }
+ if (bmval0 & FATTR4_WORD0_MAXLINK) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(255);
+ }
+ if (bmval0 & FATTR4_WORD0_MAXNAME) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(statfs.f_namelen);
+ }
+ if (bmval0 & FATTR4_WORD0_MAXREAD) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
+ }
+ if (bmval0 & FATTR4_WORD0_MAXWRITE) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
+ }
+ if (bmval1 & FATTR4_WORD1_MODE) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
+ }
+ if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(1);
+ }
+ if (bmval1 & FATTR4_WORD1_NUMLINKS) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(stat.nlink);
+ }
+ if (bmval1 & FATTR4_WORD1_OWNER) {
+ status = nfsd4_encode_user(xdr, rqstp, stat.uid);
+ if (status)
+ goto out;
+ }
+ if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
+ status = nfsd4_encode_group(xdr, rqstp, stat.gid);
+ if (status)
+ goto out;
+ }
+ if (bmval1 & FATTR4_WORD1_RAWDEV) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
+ *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
+ }
+ if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
+ p = xdr_encode_hyper(p, dummy64);
+ }
+ if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
+ p = xdr_encode_hyper(p, dummy64);
+ }
+ if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
+ p = xdr_encode_hyper(p, dummy64);
+ }
+ if (bmval1 & FATTR4_WORD1_SPACE_USED) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ dummy64 = (u64)stat.blocks << 9;
+ p = xdr_encode_hyper(p, dummy64);
+ }
+ if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
+ p = xdr_reserve_space(xdr, 12);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
+ *p++ = cpu_to_be32(stat.atime.tv_nsec);
+ }
+ if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
+ p = xdr_reserve_space(xdr, 12);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(1);
+ *p++ = cpu_to_be32(0);
+ }
+ if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
+ p = xdr_reserve_space(xdr, 12);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
+ *p++ = cpu_to_be32(stat.ctime.tv_nsec);
+ }
+ if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
+ p = xdr_reserve_space(xdr, 12);
+ if (!p)
+ goto out_resource;
+ p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
+ *p++ = cpu_to_be32(stat.mtime.tv_nsec);
+ }
+ if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ /*
+ * Get parent's attributes if not ignoring crossmount
+ * and this is the root of a cross-mounted filesystem.
+ */
+ if (ignore_crossmnt == 0 &&
+ dentry == exp->ex_path.mnt->mnt_root)
+ get_parent_attributes(exp, &stat);
+ p = xdr_encode_hyper(p, stat.ino);
+ }
+#ifdef CONFIG_NFSD_PNFS
+ if ((bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) ||
+ (bmval2 & FATTR4_WORD2_LAYOUT_TYPES)) {
+ if (exp->ex_layout_type) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(1);
+ *p++ = cpu_to_be32(exp->ex_layout_type);
+ } else {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(0);
+ }
+ }
+
+ if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(stat.blksize);
+ }
+#endif /* CONFIG_NFSD_PNFS */
+ if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
+ status = nfsd4_encode_security_label(xdr, rqstp, context,
+ contextlen);
+ if (status)
+ goto out;
+ }
+ if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
+ p = xdr_reserve_space(xdr, 16);
+ if (!p)
+ goto out_resource;
+ *p++ = cpu_to_be32(3);
+ *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
+ *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
+ *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
+ }
+
+ attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
+ write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
+ status = nfs_ok;
+
+out:
+#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
+ if (context)
+ security_release_secctx(context, contextlen);
+#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
+ kfree(acl);
+ if (tempfh) {
+ fh_put(tempfh);
+ kfree(tempfh);
+ }
+ if (status)
+ xdr_truncate_encode(xdr, starting_len);
+ return status;
+out_nfserr:
+ status = nfserrno(err);
+ goto out;
+out_resource:
+ status = nfserr_resource;
+ goto out;
+}
+
+static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
+ struct xdr_buf *buf, __be32 *p, int bytes)
+{
+ xdr->scratch.iov_len = 0;
+ memset(buf, 0, sizeof(struct xdr_buf));
+ buf->head[0].iov_base = p;
+ buf->head[0].iov_len = 0;
+ buf->len = 0;
+ xdr->buf = buf;
+ xdr->iov = buf->head;
+ xdr->p = p;
+ xdr->end = (void *)p + bytes;
+ buf->buflen = bytes;
+}
+
+__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
+ struct svc_fh *fhp, struct svc_export *exp,
+ struct dentry *dentry, u32 *bmval,
+ struct svc_rqst *rqstp, int ignore_crossmnt)
+{
+ struct xdr_buf dummy;
+ struct xdr_stream xdr;
+ __be32 ret;
+
+ svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
+ ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
+ ignore_crossmnt);
+ *p = xdr.p;
+ return ret;
+}
+
+static inline int attributes_need_mount(u32 *bmval)
+{
+ if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
+ return 1;
+ if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
+ return 1;
+ return 0;
+}
+
+static __be32
+nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
+ const char *name, int namlen)
+{
+ struct svc_export *exp = cd->rd_fhp->fh_export;
+ struct dentry *dentry;
+ __be32 nfserr;
+ int ignore_crossmnt = 0;
+
+ dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
+ if (IS_ERR(dentry))
+ return nfserrno(PTR_ERR(dentry));
+ if (d_really_is_negative(dentry)) {
+ /*
+ * nfsd_buffered_readdir drops the i_mutex between
+ * readdir and calling this callback, leaving a window
+ * where this directory entry could have gone away.
+ */
+ dput(dentry);
+ return nfserr_noent;
+ }
+
+ exp_get(exp);
+ /*
+ * In the case of a mountpoint, the client may be asking for
+ * attributes that are only properties of the underlying filesystem
+ * as opposed to the cross-mounted file system. In such a case,
+ * we will not follow the cross mount and will fill the attribtutes
+ * directly from the mountpoint dentry.
+ */
+ if (nfsd_mountpoint(dentry, exp)) {
+ int err;
+
+ if (!(exp->ex_flags & NFSEXP_V4ROOT)
+ && !attributes_need_mount(cd->rd_bmval)) {
+ ignore_crossmnt = 1;
+ goto out_encode;
+ }
+ /*
+ * Why the heck aren't we just using nfsd_lookup??
+ * Different "."/".." handling? Something else?
+ * At least, add a comment here to explain....
+ */
+ err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
+ if (err) {
+ nfserr = nfserrno(err);
+ goto out_put;
+ }
+ nfserr = check_nfsd_access(exp, cd->rd_rqstp);
+ if (nfserr)
+ goto out_put;
+
+ }
+out_encode:
+ nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
+ cd->rd_rqstp, ignore_crossmnt);
+out_put:
+ dput(dentry);
+ exp_put(exp);
+ return nfserr;
+}
+
+static __be32 *
+nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, 20);
+ if (!p)
+ return NULL;
+ *p++ = htonl(2);
+ *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
+ *p++ = htonl(0); /* bmval1 */
+
+ *p++ = htonl(4); /* attribute length */
+ *p++ = nfserr; /* no htonl */
+ return p;
+}
+
+static int
+nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct readdir_cd *ccd = ccdv;
+ struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
+ struct xdr_stream *xdr = cd->xdr;
+ int start_offset = xdr->buf->len;
+ int cookie_offset;
+ u32 name_and_cookie;
+ int entry_bytes;
+ __be32 nfserr = nfserr_toosmall;
+ __be64 wire_offset;
+ __be32 *p;
+
+ /* In nfsv4, "." and ".." never make it onto the wire.. */
+ if (name && isdotent(name, namlen)) {
+ cd->common.err = nfs_ok;
+ return 0;
+ }
+
+ if (cd->cookie_offset) {
+ wire_offset = cpu_to_be64(offset);
+ write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
+ &wire_offset, 8);
+ }
+
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto fail;
+ *p++ = xdr_one; /* mark entry present */
+ cookie_offset = xdr->buf->len;
+ p = xdr_reserve_space(xdr, 3*4 + namlen);
+ if (!p)
+ goto fail;
+ p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
+ p = xdr_encode_array(p, name, namlen); /* name length & name */
+
+ nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
+ switch (nfserr) {
+ case nfs_ok:
+ break;
+ case nfserr_resource:
+ nfserr = nfserr_toosmall;
+ goto fail;
+ case nfserr_noent:
+ xdr_truncate_encode(xdr, start_offset);
+ goto skip_entry;
+ default:
+ /*
+ * If the client requested the RDATTR_ERROR attribute,
+ * we stuff the error code into this attribute
+ * and continue. If this attribute was not requested,
+ * then in accordance with the spec, we fail the
+ * entire READDIR operation(!)
+ */
+ if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
+ goto fail;
+ p = nfsd4_encode_rdattr_error(xdr, nfserr);
+ if (p == NULL) {
+ nfserr = nfserr_toosmall;
+ goto fail;
+ }
+ }
+ nfserr = nfserr_toosmall;
+ entry_bytes = xdr->buf->len - start_offset;
+ if (entry_bytes > cd->rd_maxcount)
+ goto fail;
+ cd->rd_maxcount -= entry_bytes;
+ /*
+ * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
+ * let's always let through the first entry, at least:
+ */
+ if (!cd->rd_dircount)
+ goto fail;
+ name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
+ if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
+ goto fail;
+ cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
+
+ cd->cookie_offset = cookie_offset;
+skip_entry:
+ cd->common.err = nfs_ok;
+ return 0;
+fail:
+ xdr_truncate_encode(xdr, start_offset);
+ cd->common.err = nfserr;
+ return -EINVAL;
+}
+
+static __be32
+nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, sizeof(stateid_t));
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(sid->si_generation);
+ p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
+ sizeof(stateid_opaque_t));
+ return 0;
+}
+
+static __be32
+nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (!nfserr) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(access->ac_supported);
+ *p++ = cpu_to_be32(access->ac_resp_access);
+ }
+ return nfserr;
+}
+
+static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (!nfserr) {
+ p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
+ if (!p)
+ return nfserr_resource;
+ p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
+ NFS4_MAX_SESSIONID_LEN);
+ *p++ = cpu_to_be32(bcts->dir);
+ /* Sorry, we do not yet support RDMA over 4.1: */
+ *p++ = cpu_to_be32(0);
+ }
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+
+ if (!nfserr)
+ nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
+
+ return nfserr;
+}
+
+
+static __be32
+nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (!nfserr) {
+ p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
+ if (!p)
+ return nfserr_resource;
+ p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
+ NFS4_VERIFIER_SIZE);
+ }
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (!nfserr) {
+ p = xdr_reserve_space(xdr, 32);
+ if (!p)
+ return nfserr_resource;
+ p = encode_cinfo(p, &create->cr_cinfo);
+ *p++ = cpu_to_be32(2);
+ *p++ = cpu_to_be32(create->cr_bmval[0]);
+ *p++ = cpu_to_be32(create->cr_bmval[1]);
+ }
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
+{
+ struct svc_fh *fhp = getattr->ga_fhp;
+ struct xdr_stream *xdr = &resp->xdr;
+
+ if (nfserr)
+ return nfserr;
+
+ nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
+ getattr->ga_bmval,
+ resp->rqstp, 0);
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ struct svc_fh *fhp = *fhpp;
+ unsigned int len;
+ __be32 *p;
+
+ if (!nfserr) {
+ len = fhp->fh_handle.fh_size;
+ p = xdr_reserve_space(xdr, len + 4);
+ if (!p)
+ return nfserr_resource;
+ p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
+ }
+ return nfserr;
+}
+
+/*
+* Including all fields other than the name, a LOCK4denied structure requires
+* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
+*/
+static __be32
+nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
+{
+ struct xdr_netobj *conf = &ld->ld_owner;
+ __be32 *p;
+
+again:
+ p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
+ if (!p) {
+ /*
+ * Don't fail to return the result just because we can't
+ * return the conflicting open:
+ */
+ if (conf->len) {
+ kfree(conf->data);
+ conf->len = 0;
+ conf->data = NULL;
+ goto again;
+ }
+ return nfserr_resource;
+ }
+ p = xdr_encode_hyper(p, ld->ld_start);
+ p = xdr_encode_hyper(p, ld->ld_length);
+ *p++ = cpu_to_be32(ld->ld_type);
+ if (conf->len) {
+ p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
+ p = xdr_encode_opaque(p, conf->data, conf->len);
+ kfree(conf->data);
+ } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
+ p = xdr_encode_hyper(p, (u64)0); /* clientid */
+ *p++ = cpu_to_be32(0); /* length of owner name */
+ }
+ return nfserr_denied;
+}
+
+static __be32
+nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+
+ if (!nfserr)
+ nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
+ else if (nfserr == nfserr_denied)
+ nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
+
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+
+ if (nfserr == nfserr_denied)
+ nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+
+ if (!nfserr)
+ nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
+
+ return nfserr;
+}
+
+
+static __be32
+nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (!nfserr) {
+ p = xdr_reserve_space(xdr, 20);
+ if (!p)
+ return nfserr_resource;
+ p = encode_cinfo(p, &link->li_cinfo);
+ }
+ return nfserr;
+}
+
+
+static __be32
+nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (nfserr)
+ goto out;
+
+ nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
+ if (nfserr)
+ goto out;
+ p = xdr_reserve_space(xdr, 40);
+ if (!p)
+ return nfserr_resource;
+ p = encode_cinfo(p, &open->op_cinfo);
+ *p++ = cpu_to_be32(open->op_rflags);
+ *p++ = cpu_to_be32(2);
+ *p++ = cpu_to_be32(open->op_bmval[0]);
+ *p++ = cpu_to_be32(open->op_bmval[1]);
+ *p++ = cpu_to_be32(open->op_delegate_type);
+
+ switch (open->op_delegate_type) {
+ case NFS4_OPEN_DELEGATE_NONE:
+ break;
+ case NFS4_OPEN_DELEGATE_READ:
+ nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
+ if (nfserr)
+ return nfserr;
+ p = xdr_reserve_space(xdr, 20);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(open->op_recall);
+
+ /*
+ * TODO: ACE's in delegations
+ */
+ *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
+ break;
+ case NFS4_OPEN_DELEGATE_WRITE:
+ nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
+ if (nfserr)
+ return nfserr;
+ p = xdr_reserve_space(xdr, 32);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(0);
+
+ /*
+ * TODO: space_limit's in delegations
+ */
+ *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
+ *p++ = cpu_to_be32(~(u32)0);
+ *p++ = cpu_to_be32(~(u32)0);
+
+ /*
+ * TODO: ACE's in delegations
+ */
+ *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
+ break;
+ case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
+ switch (open->op_why_no_deleg) {
+ case WND4_CONTENTION:
+ case WND4_RESOURCE:
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(open->op_why_no_deleg);
+ /* deleg signaling not supported yet: */
+ *p++ = cpu_to_be32(0);
+ break;
+ default:
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(open->op_why_no_deleg);
+ }
+ break;
+ default:
+ BUG();
+ }
+ /* XXX save filehandle here */
+out:
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+
+ if (!nfserr)
+ nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
+
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+
+ if (!nfserr)
+ nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
+
+ return nfserr;
+}
+
+static __be32 nfsd4_encode_splice_read(
+ struct nfsd4_compoundres *resp,
+ struct nfsd4_read *read,
+ struct file *file, unsigned long maxcount)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ struct xdr_buf *buf = xdr->buf;
+ u32 eof;
+ int space_left;
+ __be32 nfserr;
+ __be32 *p = xdr->p - 2;
+
+ /* Make sure there will be room for padding if needed */
+ if (xdr->end - xdr->p < 1)
+ return nfserr_resource;
+
+ nfserr = nfsd_splice_read(read->rd_rqstp, file,
+ read->rd_offset, &maxcount);
+ if (nfserr) {
+ /*
+ * nfsd_splice_actor may have already messed with the
+ * page length; reset it so as not to confuse
+ * xdr_truncate_encode:
+ */
+ buf->page_len = 0;
+ return nfserr;
+ }
+
+ eof = (read->rd_offset + maxcount >=
+ d_inode(read->rd_fhp->fh_dentry)->i_size);
+
+ *(p++) = htonl(eof);
+ *(p++) = htonl(maxcount);
+
+ buf->page_len = maxcount;
+ buf->len += maxcount;
+ xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
+ / PAGE_SIZE;
+
+ /* Use rest of head for padding and remaining ops: */
+ buf->tail[0].iov_base = xdr->p;
+ buf->tail[0].iov_len = 0;
+ xdr->iov = buf->tail;
+ if (maxcount&3) {
+ int pad = 4 - (maxcount&3);
+
+ *(xdr->p++) = 0;
+
+ buf->tail[0].iov_base += maxcount&3;
+ buf->tail[0].iov_len = pad;
+ buf->len += pad;
+ }
+
+ space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
+ buf->buflen - buf->len);
+ buf->buflen = buf->len + space_left;
+ xdr->end = (__be32 *)((void *)xdr->end + space_left);
+
+ return 0;
+}
+
+static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
+ struct nfsd4_read *read,
+ struct file *file, unsigned long maxcount)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ u32 eof;
+ int v;
+ int starting_len = xdr->buf->len - 8;
+ long len;
+ int thislen;
+ __be32 nfserr;
+ __be32 tmp;
+ __be32 *p;
+ u32 zzz = 0;
+ int pad;
+
+ len = maxcount;
+ v = 0;
+
+ thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
+ p = xdr_reserve_space(xdr, (thislen+3)&~3);
+ WARN_ON_ONCE(!p);
+ resp->rqstp->rq_vec[v].iov_base = p;
+ resp->rqstp->rq_vec[v].iov_len = thislen;
+ v++;
+ len -= thislen;
+
+ while (len) {
+ thislen = min_t(long, len, PAGE_SIZE);
+ p = xdr_reserve_space(xdr, (thislen+3)&~3);
+ WARN_ON_ONCE(!p);
+ resp->rqstp->rq_vec[v].iov_base = p;
+ resp->rqstp->rq_vec[v].iov_len = thislen;
+ v++;
+ len -= thislen;
+ }
+ read->rd_vlen = v;
+
+ nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
+ read->rd_vlen, &maxcount);
+ if (nfserr)
+ return nfserr;
+ xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
+
+ eof = (read->rd_offset + maxcount >=
+ d_inode(read->rd_fhp->fh_dentry)->i_size);
+
+ tmp = htonl(eof);
+ write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
+ tmp = htonl(maxcount);
+ write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
+
+ pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
+ write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
+ &zzz, pad);
+ return 0;
+
+}
+
+static __be32
+nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_read *read)
+{
+ unsigned long maxcount;
+ struct xdr_stream *xdr = &resp->xdr;
+ struct file *file = read->rd_filp;
+ struct svc_fh *fhp = read->rd_fhp;
+ int starting_len = xdr->buf->len;
+ struct raparms *ra;
+ __be32 *p;
+ __be32 err;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
+ if (!p) {
+ WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
+ return nfserr_resource;
+ }
+ if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
+ WARN_ON_ONCE(1);
+ return nfserr_resource;
+ }
+ xdr_commit_encode(xdr);
+
+ maxcount = svc_max_payload(resp->rqstp);
+ maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
+ maxcount = min_t(unsigned long, maxcount, read->rd_length);
+
+ if (read->rd_filp)
+ err = nfsd_permission(resp->rqstp, fhp->fh_export,
+ fhp->fh_dentry,
+ NFSD_MAY_READ|NFSD_MAY_OWNER_OVERRIDE);
+ else
+ err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
+ &file, &ra);
+ if (err)
+ goto err_truncate;
+
+ if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
+ err = nfsd4_encode_splice_read(resp, read, file, maxcount);
+ else
+ err = nfsd4_encode_readv(resp, read, file, maxcount);
+
+ if (!read->rd_filp)
+ nfsd_put_tmp_read_open(file, ra);
+
+err_truncate:
+ if (err)
+ xdr_truncate_encode(xdr, starting_len);
+ return err;
+}
+
+static __be32
+nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
+{
+ int maxcount;
+ __be32 wire_count;
+ int zero = 0;
+ struct xdr_stream *xdr = &resp->xdr;
+ int length_offset = xdr->buf->len;
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ return nfserr_resource;
+ maxcount = PAGE_SIZE;
+
+ p = xdr_reserve_space(xdr, maxcount);
+ if (!p)
+ return nfserr_resource;
+ /*
+ * XXX: By default, the ->readlink() VFS op will truncate symlinks
+ * if they would overflow the buffer. Is this kosher in NFSv4? If
+ * not, one easy fix is: if ->readlink() precisely fills the buffer,
+ * assume that truncation occurred, and return NFS4ERR_RESOURCE.
+ */
+ nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
+ (char *)p, &maxcount);
+ if (nfserr == nfserr_isdir)
+ nfserr = nfserr_inval;
+ if (nfserr) {
+ xdr_truncate_encode(xdr, length_offset);
+ return nfserr;
+ }
+
+ wire_count = htonl(maxcount);
+ write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
+ xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
+ if (maxcount & 3)
+ write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
+ &zero, 4 - (maxcount&3));
+ return 0;
+}
+
+static __be32
+nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
+{
+ int maxcount;
+ int bytes_left;
+ loff_t offset;
+ __be64 wire_offset;
+ struct xdr_stream *xdr = &resp->xdr;
+ int starting_len = xdr->buf->len;
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
+ if (!p)
+ return nfserr_resource;
+
+ /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(0);
+ resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
+ - (char *)resp->xdr.buf->head[0].iov_base;
+
+ /*
+ * Number of bytes left for directory entries allowing for the
+ * final 8 bytes of the readdir and a following failed op:
+ */
+ bytes_left = xdr->buf->buflen - xdr->buf->len
+ - COMPOUND_ERR_SLACK_SPACE - 8;
+ if (bytes_left < 0) {
+ nfserr = nfserr_resource;
+ goto err_no_verf;
+ }
+ maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
+ /*
+ * Note the rfc defines rd_maxcount as the size of the
+ * READDIR4resok structure, which includes the verifier above
+ * and the 8 bytes encoded at the end of this function:
+ */
+ if (maxcount < 16) {
+ nfserr = nfserr_toosmall;
+ goto err_no_verf;
+ }
+ maxcount = min_t(int, maxcount-16, bytes_left);
+
+ /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
+ if (!readdir->rd_dircount)
+ readdir->rd_dircount = INT_MAX;
+
+ readdir->xdr = xdr;
+ readdir->rd_maxcount = maxcount;
+ readdir->common.err = 0;
+ readdir->cookie_offset = 0;
+
+ offset = readdir->rd_cookie;
+ nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
+ &offset,
+ &readdir->common, nfsd4_encode_dirent);
+ if (nfserr == nfs_ok &&
+ readdir->common.err == nfserr_toosmall &&
+ xdr->buf->len == starting_len + 8) {
+ /* nothing encoded; which limit did we hit?: */
+ if (maxcount - 16 < bytes_left)
+ /* It was the fault of rd_maxcount: */
+ nfserr = nfserr_toosmall;
+ else
+ /* We ran out of buffer space: */
+ nfserr = nfserr_resource;
+ }
+ if (nfserr)
+ goto err_no_verf;
+
+ if (readdir->cookie_offset) {
+ wire_offset = cpu_to_be64(offset);
+ write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
+ &wire_offset, 8);
+ }
+
+ p = xdr_reserve_space(xdr, 8);
+ if (!p) {
+ WARN_ON_ONCE(1);
+ goto err_no_verf;
+ }
+ *p++ = 0; /* no more entries */
+ *p++ = htonl(readdir->common.err == nfserr_eof);
+
+ return 0;
+err_no_verf:
+ xdr_truncate_encode(xdr, starting_len);
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (!nfserr) {
+ p = xdr_reserve_space(xdr, 20);
+ if (!p)
+ return nfserr_resource;
+ p = encode_cinfo(p, &remove->rm_cinfo);
+ }
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (!nfserr) {
+ p = xdr_reserve_space(xdr, 40);
+ if (!p)
+ return nfserr_resource;
+ p = encode_cinfo(p, &rename->rn_sinfo);
+ p = encode_cinfo(p, &rename->rn_tinfo);
+ }
+ return nfserr;
+}
+
+static __be32
+nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
+ __be32 nfserr, struct svc_export *exp)
+{
+ u32 i, nflavs, supported;
+ struct exp_flavor_info *flavs;
+ struct exp_flavor_info def_flavs[2];
+ __be32 *p, *flavorsp;
+ static bool report = true;
+
+ if (nfserr)
+ goto out;
+ nfserr = nfserr_resource;
+ if (exp->ex_nflavors) {
+ flavs = exp->ex_flavors;
+ nflavs = exp->ex_nflavors;
+ } else { /* Handling of some defaults in absence of real secinfo: */
+ flavs = def_flavs;
+ if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
+ nflavs = 2;
+ flavs[0].pseudoflavor = RPC_AUTH_UNIX;
+ flavs[1].pseudoflavor = RPC_AUTH_NULL;
+ } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
+ nflavs = 1;
+ flavs[0].pseudoflavor
+ = svcauth_gss_flavor(exp->ex_client);
+ } else {
+ nflavs = 1;
+ flavs[0].pseudoflavor
+ = exp->ex_client->flavour->flavour;
+ }
+ }
+
+ supported = 0;
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out;
+ flavorsp = p++; /* to be backfilled later */
+
+ for (i = 0; i < nflavs; i++) {
+ rpc_authflavor_t pf = flavs[i].pseudoflavor;
+ struct rpcsec_gss_info info;
+
+ if (rpcauth_get_gssinfo(pf, &info) == 0) {
+ supported++;
+ p = xdr_reserve_space(xdr, 4 + 4 +
+ XDR_LEN(info.oid.len) + 4 + 4);
+ if (!p)
+ goto out;
+ *p++ = cpu_to_be32(RPC_AUTH_GSS);
+ p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
+ *p++ = cpu_to_be32(info.qop);
+ *p++ = cpu_to_be32(info.service);
+ } else if (pf < RPC_AUTH_MAXFLAVOR) {
+ supported++;
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out;
+ *p++ = cpu_to_be32(pf);
+ } else {
+ if (report)
+ pr_warn("NFS: SECINFO: security flavor %u "
+ "is not supported\n", pf);
+ }
+ }
+
+ if (nflavs != supported)
+ report = false;
+ *flavorsp = htonl(supported);
+ nfserr = 0;
+out:
+ if (exp)
+ exp_put(exp);
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_secinfo *secinfo)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+
+ return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
+}
+
+static __be32
+nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_secinfo_no_name *secinfo)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+
+ return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
+}
+
+/*
+ * The SETATTR encode routine is special -- it always encodes a bitmap,
+ * regardless of the error status.
+ */
+static __be32
+nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, 16);
+ if (!p)
+ return nfserr_resource;
+ if (nfserr) {
+ *p++ = cpu_to_be32(3);
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(0);
+ }
+ else {
+ *p++ = cpu_to_be32(3);
+ *p++ = cpu_to_be32(setattr->sa_bmval[0]);
+ *p++ = cpu_to_be32(setattr->sa_bmval[1]);
+ *p++ = cpu_to_be32(setattr->sa_bmval[2]);
+ }
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (!nfserr) {
+ p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
+ if (!p)
+ return nfserr_resource;
+ p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
+ p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
+ NFS4_VERIFIER_SIZE);
+ }
+ else if (nfserr == nfserr_clid_inuse) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(0);
+ *p++ = cpu_to_be32(0);
+ }
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (!nfserr) {
+ p = xdr_reserve_space(xdr, 16);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(write->wr_bytes_written);
+ *p++ = cpu_to_be32(write->wr_how_written);
+ p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
+ NFS4_VERIFIER_SIZE);
+ }
+ return nfserr;
+}
+
+static const u32 nfs4_minimal_spo_must_enforce[2] = {
+ [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
+ 1 << (OP_EXCHANGE_ID - 32) |
+ 1 << (OP_CREATE_SESSION - 32) |
+ 1 << (OP_DESTROY_SESSION - 32) |
+ 1 << (OP_DESTROY_CLIENTID - 32)
+};
+
+static __be32
+nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_exchange_id *exid)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+ char *major_id;
+ char *server_scope;
+ int major_id_sz;
+ int server_scope_sz;
+ uint64_t minor_id = 0;
+
+ if (nfserr)
+ return nfserr;
+
+ major_id = utsname()->nodename;
+ major_id_sz = strlen(major_id);
+ server_scope = utsname()->nodename;
+ server_scope_sz = strlen(server_scope);
+
+ p = xdr_reserve_space(xdr,
+ 8 /* eir_clientid */ +
+ 4 /* eir_sequenceid */ +
+ 4 /* eir_flags */ +
+ 4 /* spr_how */);
+ if (!p)
+ return nfserr_resource;
+
+ p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
+ *p++ = cpu_to_be32(exid->seqid);
+ *p++ = cpu_to_be32(exid->flags);
+
+ *p++ = cpu_to_be32(exid->spa_how);
+
+ switch (exid->spa_how) {
+ case SP4_NONE:
+ break;
+ case SP4_MACH_CRED:
+ /* spo_must_enforce, spo_must_allow */
+ p = xdr_reserve_space(xdr, 16);
+ if (!p)
+ return nfserr_resource;
+
+ /* spo_must_enforce bitmap: */
+ *p++ = cpu_to_be32(2);
+ *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
+ *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
+ /* empty spo_must_allow bitmap: */
+ *p++ = cpu_to_be32(0);
+
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ }
+
+ p = xdr_reserve_space(xdr,
+ 8 /* so_minor_id */ +
+ 4 /* so_major_id.len */ +
+ (XDR_QUADLEN(major_id_sz) * 4) +
+ 4 /* eir_server_scope.len */ +
+ (XDR_QUADLEN(server_scope_sz) * 4) +
+ 4 /* eir_server_impl_id.count (0) */);
+ if (!p)
+ return nfserr_resource;
+
+ /* The server_owner struct */
+ p = xdr_encode_hyper(p, minor_id); /* Minor id */
+ /* major id */
+ p = xdr_encode_opaque(p, major_id, major_id_sz);
+
+ /* Server scope */
+ p = xdr_encode_opaque(p, server_scope, server_scope_sz);
+
+ /* Implementation id */
+ *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
+ return 0;
+}
+
+static __be32
+nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_create_session *sess)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(xdr, 24);
+ if (!p)
+ return nfserr_resource;
+ p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
+ NFS4_MAX_SESSIONID_LEN);
+ *p++ = cpu_to_be32(sess->seqid);
+ *p++ = cpu_to_be32(sess->flags);
+
+ p = xdr_reserve_space(xdr, 28);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(0); /* headerpadsz */
+ *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
+ *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
+ *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
+ *p++ = cpu_to_be32(sess->fore_channel.maxops);
+ *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
+ *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
+
+ if (sess->fore_channel.nr_rdma_attrs) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
+ }
+
+ p = xdr_reserve_space(xdr, 28);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(0); /* headerpadsz */
+ *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
+ *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
+ *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
+ *p++ = cpu_to_be32(sess->back_channel.maxops);
+ *p++ = cpu_to_be32(sess->back_channel.maxreqs);
+ *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
+
+ if (sess->back_channel.nr_rdma_attrs) {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
+ }
+ return 0;
+}
+
+static __be32
+nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_sequence *seq)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
+ if (!p)
+ return nfserr_resource;
+ p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
+ NFS4_MAX_SESSIONID_LEN);
+ *p++ = cpu_to_be32(seq->seqid);
+ *p++ = cpu_to_be32(seq->slotid);
+ /* Note slotid's are numbered from zero: */
+ *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
+ *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
+ *p++ = cpu_to_be32(seq->status_flags);
+
+ resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
+ return 0;
+}
+
+static __be32
+nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_test_stateid *test_stateid)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_test_stateid_id *stateid, *next;
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
+ if (!p)
+ return nfserr_resource;
+ *p++ = htonl(test_stateid->ts_num_ids);
+
+ list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
+ *p++ = stateid->ts_id_status;
+ }
+
+ return nfserr;
+}
+
+#ifdef CONFIG_NFSD_PNFS
+static __be32
+nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_getdeviceinfo *gdev)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ const struct nfsd4_layout_ops *ops =
+ nfsd4_layout_ops[gdev->gd_layout_type];
+ u32 starting_len = xdr->buf->len, needed_len;
+ __be32 *p;
+
+ dprintk("%s: err %d\n", __func__, nfserr);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_resource;
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out;
+
+ *p++ = cpu_to_be32(gdev->gd_layout_type);
+
+ /* If maxcount is 0 then just update notifications */
+ if (gdev->gd_maxcount != 0) {
+ nfserr = ops->encode_getdeviceinfo(xdr, gdev);
+ if (nfserr) {
+ /*
+ * We don't bother to burden the layout drivers with
+ * enforcing gd_maxcount, just tell the client to
+ * come back with a bigger buffer if it's not enough.
+ */
+ if (xdr->buf->len + 4 > gdev->gd_maxcount)
+ goto toosmall;
+ goto out;
+ }
+ }
+
+ nfserr = nfserr_resource;
+ if (gdev->gd_notify_types) {
+ p = xdr_reserve_space(xdr, 4 + 4);
+ if (!p)
+ goto out;
+ *p++ = cpu_to_be32(1); /* bitmap length */
+ *p++ = cpu_to_be32(gdev->gd_notify_types);
+ } else {
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ goto out;
+ *p++ = 0;
+ }
+
+ nfserr = 0;
+out:
+ kfree(gdev->gd_device);
+ dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
+ return nfserr;
+
+toosmall:
+ dprintk("%s: maxcount too small\n", __func__);
+ needed_len = xdr->buf->len + 4 /* notifications */;
+ xdr_truncate_encode(xdr, starting_len);
+ p = xdr_reserve_space(xdr, 4);
+ if (!p) {
+ nfserr = nfserr_resource;
+ } else {
+ *p++ = cpu_to_be32(needed_len);
+ nfserr = nfserr_toosmall;
+ }
+ goto out;
+}
+
+static __be32
+nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_layoutget *lgp)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ const struct nfsd4_layout_ops *ops =
+ nfsd4_layout_ops[lgp->lg_layout_type];
+ __be32 *p;
+
+ dprintk("%s: err %d\n", __func__, nfserr);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_resource;
+ p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
+ if (!p)
+ goto out;
+
+ *p++ = cpu_to_be32(1); /* we always set return-on-close */
+ *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
+ p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
+ sizeof(stateid_opaque_t));
+
+ *p++ = cpu_to_be32(1); /* we always return a single layout */
+ p = xdr_encode_hyper(p, lgp->lg_seg.offset);
+ p = xdr_encode_hyper(p, lgp->lg_seg.length);
+ *p++ = cpu_to_be32(lgp->lg_seg.iomode);
+ *p++ = cpu_to_be32(lgp->lg_layout_type);
+
+ nfserr = ops->encode_layoutget(xdr, lgp);
+out:
+ kfree(lgp->lg_content);
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_layoutcommit *lcp)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(lcp->lc_size_chg);
+ if (lcp->lc_size_chg) {
+ p = xdr_reserve_space(xdr, 8);
+ if (!p)
+ return nfserr_resource;
+ p = xdr_encode_hyper(p, lcp->lc_newsize);
+ }
+
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_layoutreturn *lrp)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(xdr, 4);
+ if (!p)
+ return nfserr_resource;
+ *p++ = cpu_to_be32(lrp->lrs_present);
+ if (lrp->lrs_present)
+ return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
+ return nfs_ok;
+}
+#endif /* CONFIG_NFSD_PNFS */
+
+static __be32
+nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_seek *seek)
+{
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(&resp->xdr, 4 + 8);
+ *p++ = cpu_to_be32(seek->seek_eof);
+ p = xdr_encode_hyper(p, seek->seek_pos);
+
+ return nfserr;
+}
+
+static __be32
+nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
+{
+ return nfserr;
+}
+
+typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
+
+/*
+ * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
+ * since we don't need to filter out obsolete ops as this is
+ * done in the decoding phase.
+ */
+static nfsd4_enc nfsd4_enc_ops[] = {
+ [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
+ [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
+ [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
+ [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
+ [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
+ [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
+ [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
+ [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
+ [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
+ [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
+ [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
+ [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
+ [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
+ [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
+ [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
+ [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
+ [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
+ [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
+ [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
+ [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
+ [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
+ [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
+ [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
+
+ /* NFSv4.1 operations */
+ [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
+ [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
+ [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
+ [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
+#ifdef CONFIG_NFSD_PNFS
+ [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
+ [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
+ [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
+ [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
+#else
+ [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
+#endif
+ [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
+ [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
+ [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
+ [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
+
+ /* NFSv4.2 operations */
+ [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
+ [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
+};
+
+/*
+ * Calculate whether we still have space to encode repsize bytes.
+ * There are two considerations:
+ * - For NFS versions >=4.1, the size of the reply must stay within
+ * session limits
+ * - For all NFS versions, we must stay within limited preallocated
+ * buffer space.
+ *
+ * This is called before the operation is processed, so can only provide
+ * an upper estimate. For some nonidempotent operations (such as
+ * getattr), it's not necessarily a problem if that estimate is wrong,
+ * as we can fail it after processing without significant side effects.
+ */
+__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
+{
+ struct xdr_buf *buf = &resp->rqstp->rq_res;
+ struct nfsd4_slot *slot = resp->cstate.slot;
+
+ if (buf->len + respsize <= buf->buflen)
+ return nfs_ok;
+ if (!nfsd4_has_session(&resp->cstate))
+ return nfserr_resource;
+ if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
+ WARN_ON_ONCE(1);
+ return nfserr_rep_too_big_to_cache;
+ }
+ return nfserr_rep_too_big;
+}
+
+void
+nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ struct nfs4_stateowner *so = resp->cstate.replay_owner;
+ struct svc_rqst *rqstp = resp->rqstp;
+ int post_err_offset;
+ nfsd4_enc encoder;
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, 8);
+ if (!p) {
+ WARN_ON_ONCE(1);
+ return;
+ }
+ *p++ = cpu_to_be32(op->opnum);
+ post_err_offset = xdr->buf->len;
+
+ if (op->opnum == OP_ILLEGAL)
+ goto status;
+ BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
+ !nfsd4_enc_ops[op->opnum]);
+ encoder = nfsd4_enc_ops[op->opnum];
+ op->status = encoder(resp, op->status, &op->u);
+ xdr_commit_encode(xdr);
+
+ /* nfsd4_check_resp_size guarantees enough room for error status */
+ if (!op->status) {
+ int space_needed = 0;
+ if (!nfsd4_last_compound_op(rqstp))
+ space_needed = COMPOUND_ERR_SLACK_SPACE;
+ op->status = nfsd4_check_resp_size(resp, space_needed);
+ }
+ if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
+ struct nfsd4_slot *slot = resp->cstate.slot;
+
+ if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
+ op->status = nfserr_rep_too_big_to_cache;
+ else
+ op->status = nfserr_rep_too_big;
+ }
+ if (op->status == nfserr_resource ||
+ op->status == nfserr_rep_too_big ||
+ op->status == nfserr_rep_too_big_to_cache) {
+ /*
+ * The operation may have already been encoded or
+ * partially encoded. No op returns anything additional
+ * in the case of one of these three errors, so we can
+ * just truncate back to after the status. But it's a
+ * bug if we had to do this on a non-idempotent op:
+ */
+ warn_on_nonidempotent_op(op);
+ xdr_truncate_encode(xdr, post_err_offset);
+ }
+ if (so) {
+ int len = xdr->buf->len - post_err_offset;
+
+ so->so_replay.rp_status = op->status;
+ so->so_replay.rp_buflen = len;
+ read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
+ so->so_replay.rp_buf, len);
+ }
+status:
+ /* Note that op->status is already in network byte order: */
+ write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
+}
+
+/*
+ * Encode the reply stored in the stateowner reply cache
+ *
+ * XDR note: do not encode rp->rp_buflen: the buffer contains the
+ * previously sent already encoded operation.
+ */
+void
+nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
+{
+ __be32 *p;
+ struct nfs4_replay *rp = op->replay;
+
+ BUG_ON(!rp);
+
+ p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
+ if (!p) {
+ WARN_ON_ONCE(1);
+ return;
+ }
+ *p++ = cpu_to_be32(op->opnum);
+ *p++ = rp->rp_status; /* already xdr'ed */
+
+ p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
+}
+
+int
+nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
+{
+ return xdr_ressize_check(rqstp, p);
+}
+
+int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
+{
+ struct svc_rqst *rqstp = rq;
+ struct nfsd4_compoundargs *args = rqstp->rq_argp;
+
+ if (args->ops != args->iops) {
+ kfree(args->ops);
+ args->ops = args->iops;
+ }
+ kfree(args->tmpp);
+ args->tmpp = NULL;
+ while (args->to_free) {
+ struct svcxdr_tmpbuf *tb = args->to_free;
+ args->to_free = tb->next;
+ kfree(tb);
+ }
+ return 1;
+}
+
+int
+nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
+{
+ if (rqstp->rq_arg.head[0].iov_len % 4) {
+ /* client is nuts */
+ dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
+ __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
+ return 0;
+ }
+ args->p = p;
+ args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
+ args->pagelist = rqstp->rq_arg.pages;
+ args->pagelen = rqstp->rq_arg.page_len;
+ args->tmpp = NULL;
+ args->to_free = NULL;
+ args->ops = args->iops;
+ args->rqstp = rqstp;
+
+ return !nfsd4_decode_compound(args);
+}
+
+int
+nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
+{
+ /*
+ * All that remains is to write the tag and operation count...
+ */
+ struct xdr_buf *buf = resp->xdr.buf;
+
+ WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
+ buf->tail[0].iov_len);
+
+ rqstp->rq_next_page = resp->xdr.page_ptr + 1;
+
+ p = resp->tagp;
+ *p++ = htonl(resp->taglen);
+ memcpy(p, resp->tag, resp->taglen);
+ p += XDR_QUADLEN(resp->taglen);
+ *p++ = htonl(resp->opcnt);
+
+ nfsd4_sequence_done(resp);
+ return 1;
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
Code Review / kvmfornfv.git / blobdiff