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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/nfsd/nfs4proc.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/nfsd/nfs4proc.c')
-rw-r--r--fs/nfsd/nfs4proc.c3633
1 files changed, 3633 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
new file mode 100644
index 000000000..a9105e95b
--- /dev/null
+++ b/fs/nfsd/nfs4proc.c
@@ -0,0 +1,3633 @@
+/*
+ * Server-side procedures 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/fs_struct.h>
+#include <linux/file.h>
+#include <linux/falloc.h>
+#include <linux/slab.h>
+#include <linux/kthread.h>
+#include <linux/namei.h>
+
+#include <linux/sunrpc/addr.h>
+#include <linux/nfs_ssc.h>
+
+#include "idmap.h"
+#include "cache.h"
+#include "xdr4.h"
+#include "vfs.h"
+#include "current_stateid.h"
+#include "netns.h"
+#include "acl.h"
+#include "pnfs.h"
+#include "trace.h"
+
+static bool inter_copy_offload_enable;
+module_param(inter_copy_offload_enable, bool, 0644);
+MODULE_PARM_DESC(inter_copy_offload_enable,
+ "Enable inter server to server copy offload. Default: false");
+
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */
+module_param(nfsd4_ssc_umount_timeout, int, 0644);
+MODULE_PARM_DESC(nfsd4_ssc_umount_timeout,
+ "idle msecs before unmount export from source server");
+#endif
+
+#define NFSDDBG_FACILITY NFSDDBG_PROC
+
+static u32 nfsd_attrmask[] = {
+ NFSD_WRITEABLE_ATTRS_WORD0,
+ NFSD_WRITEABLE_ATTRS_WORD1,
+ NFSD_WRITEABLE_ATTRS_WORD2
+};
+
+static u32 nfsd41_ex_attrmask[] = {
+ NFSD_SUPPATTR_EXCLCREAT_WORD0,
+ NFSD_SUPPATTR_EXCLCREAT_WORD1,
+ NFSD_SUPPATTR_EXCLCREAT_WORD2
+};
+
+static __be32
+check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ u32 *bmval, u32 *writable)
+{
+ struct dentry *dentry = cstate->current_fh.fh_dentry;
+ struct svc_export *exp = cstate->current_fh.fh_export;
+
+ if (!nfsd_attrs_supported(cstate->minorversion, bmval))
+ return nfserr_attrnotsupp;
+ if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
+ return nfserr_attrnotsupp;
+ if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
+ !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
+ return nfserr_attrnotsupp;
+ if (writable && !bmval_is_subset(bmval, writable))
+ return nfserr_inval;
+ if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
+ (bmval[1] & FATTR4_WORD1_MODE))
+ return nfserr_inval;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_check_open_attributes(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
+{
+ __be32 status = nfs_ok;
+
+ if (open->op_create == NFS4_OPEN_CREATE) {
+ if (open->op_createmode == NFS4_CREATE_UNCHECKED
+ || open->op_createmode == NFS4_CREATE_GUARDED)
+ status = check_attr_support(rqstp, cstate,
+ open->op_bmval, nfsd_attrmask);
+ else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
+ status = check_attr_support(rqstp, cstate,
+ open->op_bmval, nfsd41_ex_attrmask);
+ }
+
+ return status;
+}
+
+static int
+is_create_with_attrs(struct nfsd4_open *open)
+{
+ return open->op_create == NFS4_OPEN_CREATE
+ && (open->op_createmode == NFS4_CREATE_UNCHECKED
+ || open->op_createmode == NFS4_CREATE_GUARDED
+ || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
+}
+
+static inline void
+fh_dup2(struct svc_fh *dst, struct svc_fh *src)
+{
+ fh_put(dst);
+ dget(src->fh_dentry);
+ if (src->fh_export)
+ exp_get(src->fh_export);
+ *dst = *src;
+}
+
+static __be32
+do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
+{
+
+ if (open->op_truncate &&
+ !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
+ return nfserr_inval;
+
+ accmode |= NFSD_MAY_READ_IF_EXEC;
+
+ if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
+ accmode |= NFSD_MAY_READ;
+ if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
+ accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
+ if (open->op_share_deny & NFS4_SHARE_DENY_READ)
+ accmode |= NFSD_MAY_WRITE;
+
+ return fh_verify(rqstp, current_fh, S_IFREG, accmode);
+}
+
+static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
+{
+ umode_t mode = d_inode(fh->fh_dentry)->i_mode;
+
+ if (S_ISREG(mode))
+ return nfs_ok;
+ if (S_ISDIR(mode))
+ return nfserr_isdir;
+ /*
+ * Using err_symlink as our catch-all case may look odd; but
+ * there's no other obvious error for this case in 4.0, and we
+ * happen to know that it will cause the linux v4 client to do
+ * the right thing on attempts to open something other than a
+ * regular file.
+ */
+ return nfserr_symlink;
+}
+
+static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
+{
+ if (nfsd4_has_session(cstate))
+ return;
+ fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
+ &resfh->fh_handle);
+}
+
+static inline bool nfsd4_create_is_exclusive(int createmode)
+{
+ return createmode == NFS4_CREATE_EXCLUSIVE ||
+ createmode == NFS4_CREATE_EXCLUSIVE4_1;
+}
+
+static __be32
+nfsd4_vfs_create(struct svc_fh *fhp, struct dentry *child,
+ struct nfsd4_open *open)
+{
+ struct file *filp;
+ struct path path;
+ int oflags;
+
+ oflags = O_CREAT | O_LARGEFILE;
+ switch (open->op_share_access & NFS4_SHARE_ACCESS_BOTH) {
+ case NFS4_SHARE_ACCESS_WRITE:
+ oflags |= O_WRONLY;
+ break;
+ case NFS4_SHARE_ACCESS_BOTH:
+ oflags |= O_RDWR;
+ break;
+ default:
+ oflags |= O_RDONLY;
+ }
+
+ path.mnt = fhp->fh_export->ex_path.mnt;
+ path.dentry = child;
+ filp = dentry_create(&path, oflags, open->op_iattr.ia_mode,
+ current_cred());
+ if (IS_ERR(filp))
+ return nfserrno(PTR_ERR(filp));
+
+ open->op_filp = filp;
+ return nfs_ok;
+}
+
+/*
+ * Implement NFSv4's unchecked, guarded, and exclusive create
+ * semantics for regular files. Open state for this new file is
+ * subsequently fabricated in nfsd4_process_open2().
+ *
+ * Upon return, caller must release @fhp and @resfhp.
+ */
+static __be32
+nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ struct svc_fh *resfhp, struct nfsd4_open *open)
+{
+ struct iattr *iap = &open->op_iattr;
+ struct nfsd_attrs attrs = {
+ .na_iattr = iap,
+ .na_seclabel = &open->op_label,
+ };
+ struct dentry *parent, *child;
+ __u32 v_mtime, v_atime;
+ struct inode *inode;
+ __be32 status;
+ int host_err;
+
+ if (isdotent(open->op_fname, open->op_fnamelen))
+ return nfserr_exist;
+ if (!(iap->ia_valid & ATTR_MODE))
+ iap->ia_mode = 0;
+
+ status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
+ if (status != nfs_ok)
+ return status;
+ parent = fhp->fh_dentry;
+ inode = d_inode(parent);
+
+ host_err = fh_want_write(fhp);
+ if (host_err)
+ return nfserrno(host_err);
+
+ if (is_create_with_attrs(open))
+ nfsd4_acl_to_attr(NF4REG, open->op_acl, &attrs);
+
+ inode_lock_nested(inode, I_MUTEX_PARENT);
+
+ child = lookup_one_len(open->op_fname, parent, open->op_fnamelen);
+ if (IS_ERR(child)) {
+ status = nfserrno(PTR_ERR(child));
+ goto out;
+ }
+
+ if (d_really_is_negative(child)) {
+ status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE);
+ if (status != nfs_ok)
+ goto out;
+ }
+
+ status = fh_compose(resfhp, fhp->fh_export, child, fhp);
+ if (status != nfs_ok)
+ goto out;
+
+ v_mtime = 0;
+ v_atime = 0;
+ if (nfsd4_create_is_exclusive(open->op_createmode)) {
+ u32 *verifier = (u32 *)open->op_verf.data;
+
+ /*
+ * Solaris 7 gets confused (bugid 4218508) if these have
+ * the high bit set, as do xfs filesystems without the
+ * "bigtime" feature. So just clear the high bits. If this
+ * is ever changed to use different attrs for storing the
+ * verifier, then do_open_lookup() will also need to be
+ * fixed accordingly.
+ */
+ v_mtime = verifier[0] & 0x7fffffff;
+ v_atime = verifier[1] & 0x7fffffff;
+ }
+
+ if (d_really_is_positive(child)) {
+ status = nfs_ok;
+
+ /* NFSv4 protocol requires change attributes even though
+ * no change happened.
+ */
+ fh_fill_both_attrs(fhp);
+
+ switch (open->op_createmode) {
+ case NFS4_CREATE_UNCHECKED:
+ if (!d_is_reg(child))
+ break;
+
+ /*
+ * In NFSv4, we don't want to truncate the file
+ * now. This would be wrong if the OPEN fails for
+ * some other reason. Furthermore, if the size is
+ * nonzero, we should ignore it according to spec!
+ */
+ open->op_truncate = (iap->ia_valid & ATTR_SIZE) &&
+ !iap->ia_size;
+ break;
+ case NFS4_CREATE_GUARDED:
+ status = nfserr_exist;
+ break;
+ case NFS4_CREATE_EXCLUSIVE:
+ if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
+ d_inode(child)->i_atime.tv_sec == v_atime &&
+ d_inode(child)->i_size == 0) {
+ open->op_created = true;
+ break; /* subtle */
+ }
+ status = nfserr_exist;
+ break;
+ case NFS4_CREATE_EXCLUSIVE4_1:
+ if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
+ d_inode(child)->i_atime.tv_sec == v_atime &&
+ d_inode(child)->i_size == 0) {
+ open->op_created = true;
+ goto set_attr; /* subtle */
+ }
+ status = nfserr_exist;
+ }
+ goto out;
+ }
+
+ if (!IS_POSIXACL(inode))
+ iap->ia_mode &= ~current_umask();
+
+ fh_fill_pre_attrs(fhp);
+ status = nfsd4_vfs_create(fhp, child, open);
+ if (status != nfs_ok)
+ goto out;
+ open->op_created = true;
+ fh_fill_post_attrs(fhp);
+
+ /* A newly created file already has a file size of zero. */
+ if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0))
+ iap->ia_valid &= ~ATTR_SIZE;
+ if (nfsd4_create_is_exclusive(open->op_createmode)) {
+ iap->ia_valid = ATTR_MTIME | ATTR_ATIME |
+ ATTR_MTIME_SET|ATTR_ATIME_SET;
+ iap->ia_mtime.tv_sec = v_mtime;
+ iap->ia_atime.tv_sec = v_atime;
+ iap->ia_mtime.tv_nsec = 0;
+ iap->ia_atime.tv_nsec = 0;
+ }
+
+set_attr:
+ status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs);
+
+ if (attrs.na_labelerr)
+ open->op_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+ if (attrs.na_aclerr)
+ open->op_bmval[0] &= ~FATTR4_WORD0_ACL;
+out:
+ inode_unlock(inode);
+ nfsd_attrs_free(&attrs);
+ if (child && !IS_ERR(child))
+ dput(child);
+ fh_drop_write(fhp);
+ return status;
+}
+
+static __be32
+do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
+{
+ struct svc_fh *current_fh = &cstate->current_fh;
+ int accmode;
+ __be32 status;
+
+ *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
+ if (!*resfh)
+ return nfserr_jukebox;
+ fh_init(*resfh, NFS4_FHSIZE);
+ open->op_truncate = false;
+
+ if (open->op_create) {
+ /* FIXME: check session persistence and pnfs flags.
+ * The nfsv4.1 spec requires the following semantics:
+ *
+ * Persistent | pNFS | Server REQUIRED | Client Allowed
+ * Reply Cache | server | |
+ * -------------+--------+-----------------+--------------------
+ * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
+ * | | | (SHOULD)
+ * | | and EXCLUSIVE4 | or EXCLUSIVE4
+ * | | | (SHOULD NOT)
+ * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
+ * yes | no | GUARDED4 | GUARDED4
+ * yes | yes | GUARDED4 | GUARDED4
+ */
+
+ current->fs->umask = open->op_umask;
+ status = nfsd4_create_file(rqstp, current_fh, *resfh, open);
+ current->fs->umask = 0;
+
+ /*
+ * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
+ * use the returned bitmask to indicate which attributes
+ * we used to store the verifier:
+ */
+ if (nfsd4_create_is_exclusive(open->op_createmode) && status == 0)
+ open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
+ FATTR4_WORD1_TIME_MODIFY);
+ } else {
+ status = nfsd_lookup(rqstp, current_fh,
+ open->op_fname, open->op_fnamelen, *resfh);
+ if (!status)
+ /* NFSv4 protocol requires change attributes even though
+ * no change happened.
+ */
+ fh_fill_both_attrs(current_fh);
+ }
+ if (status)
+ goto out;
+ status = nfsd_check_obj_isreg(*resfh);
+ if (status)
+ goto out;
+
+ nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
+ accmode = NFSD_MAY_NOP;
+ if (open->op_created ||
+ open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
+ accmode |= NFSD_MAY_OWNER_OVERRIDE;
+ status = do_open_permission(rqstp, *resfh, open, accmode);
+ set_change_info(&open->op_cinfo, current_fh);
+out:
+ return status;
+}
+
+static __be32
+do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
+{
+ struct svc_fh *current_fh = &cstate->current_fh;
+ int accmode = 0;
+
+ /* We don't know the target directory, and therefore can not
+ * set the change info
+ */
+
+ memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
+
+ nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
+
+ open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
+ (open->op_iattr.ia_size == 0);
+ /*
+ * In the delegation case, the client is telling us about an
+ * open that it *already* performed locally, some time ago. We
+ * should let it succeed now if possible.
+ *
+ * In the case of a CLAIM_FH open, on the other hand, the client
+ * may be counting on us to enforce permissions (the Linux 4.1
+ * client uses this for normal opens, for example).
+ */
+ if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
+ accmode = NFSD_MAY_OWNER_OVERRIDE;
+
+ return do_open_permission(rqstp, current_fh, open, accmode);
+}
+
+static void
+copy_clientid(clientid_t *clid, struct nfsd4_session *session)
+{
+ struct nfsd4_sessionid *sid =
+ (struct nfsd4_sessionid *)session->se_sessionid.data;
+
+ clid->cl_boot = sid->clientid.cl_boot;
+ clid->cl_id = sid->clientid.cl_id;
+}
+
+static __be32
+nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_open *open = &u->open;
+ __be32 status;
+ struct svc_fh *resfh = NULL;
+ struct net *net = SVC_NET(rqstp);
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ bool reclaim = false;
+
+ dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
+ (int)open->op_fnamelen, open->op_fname,
+ open->op_openowner);
+
+ open->op_filp = NULL;
+ open->op_rqstp = rqstp;
+
+ /* This check required by spec. */
+ if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
+ return nfserr_inval;
+
+ open->op_created = false;
+ /*
+ * RFC5661 18.51.3
+ * Before RECLAIM_COMPLETE done, server should deny new lock
+ */
+ if (nfsd4_has_session(cstate) &&
+ !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) &&
+ open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
+ return nfserr_grace;
+
+ if (nfsd4_has_session(cstate))
+ copy_clientid(&open->op_clientid, cstate->session);
+
+ /* check seqid for replay. set nfs4_owner */
+ status = nfsd4_process_open1(cstate, open, nn);
+ if (status == nfserr_replay_me) {
+ struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
+ fh_put(&cstate->current_fh);
+ fh_copy_shallow(&cstate->current_fh.fh_handle,
+ &rp->rp_openfh);
+ status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
+ if (status)
+ dprintk("nfsd4_open: replay failed"
+ " restoring previous filehandle\n");
+ else
+ status = nfserr_replay_me;
+ }
+ if (status)
+ goto out;
+ if (open->op_xdr_error) {
+ status = open->op_xdr_error;
+ goto out;
+ }
+
+ status = nfsd4_check_open_attributes(rqstp, cstate, open);
+ if (status)
+ goto out;
+
+ /* Openowner is now set, so sequence id will get bumped. Now we need
+ * these checks before we do any creates: */
+ status = nfserr_grace;
+ if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
+ goto out;
+ status = nfserr_no_grace;
+ if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
+ goto out;
+
+ switch (open->op_claim_type) {
+ case NFS4_OPEN_CLAIM_DELEGATE_CUR:
+ case NFS4_OPEN_CLAIM_NULL:
+ status = do_open_lookup(rqstp, cstate, open, &resfh);
+ if (status)
+ goto out;
+ break;
+ case NFS4_OPEN_CLAIM_PREVIOUS:
+ status = nfs4_check_open_reclaim(cstate->clp);
+ if (status)
+ goto out;
+ open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
+ reclaim = true;
+ fallthrough;
+ case NFS4_OPEN_CLAIM_FH:
+ case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
+ status = do_open_fhandle(rqstp, cstate, open);
+ if (status)
+ goto out;
+ resfh = &cstate->current_fh;
+ break;
+ case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
+ case NFS4_OPEN_CLAIM_DELEGATE_PREV:
+ status = nfserr_notsupp;
+ goto out;
+ default:
+ status = nfserr_inval;
+ goto out;
+ }
+
+ status = nfsd4_process_open2(rqstp, resfh, open);
+ if (status && open->op_created)
+ pr_warn("nfsd4_process_open2 failed to open newly-created file: status=%u\n",
+ be32_to_cpu(status));
+ if (reclaim && !status)
+ nn->somebody_reclaimed = true;
+out:
+ if (open->op_filp) {
+ fput(open->op_filp);
+ open->op_filp = NULL;
+ }
+ if (resfh && resfh != &cstate->current_fh) {
+ fh_dup2(&cstate->current_fh, resfh);
+ fh_put(resfh);
+ kfree(resfh);
+ }
+ nfsd4_cleanup_open_state(cstate, open);
+ nfsd4_bump_seqid(cstate, status);
+ return status;
+}
+
+/*
+ * OPEN is the only seqid-mutating operation whose decoding can fail
+ * with a seqid-mutating error (specifically, decoding of user names in
+ * the attributes). Therefore we have to do some processing to look up
+ * the stateowner so that we can bump the seqid.
+ */
+static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
+{
+ struct nfsd4_open *open = &op->u.open;
+
+ if (!seqid_mutating_err(ntohl(op->status)))
+ return op->status;
+ if (nfsd4_has_session(cstate))
+ return op->status;
+ open->op_xdr_error = op->status;
+ return nfsd4_open(rqstp, cstate, &op->u);
+}
+
+/*
+ * filehandle-manipulating ops.
+ */
+static __be32
+nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ u->getfh = &cstate->current_fh;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_putfh *putfh = &u->putfh;
+ __be32 ret;
+
+ fh_put(&cstate->current_fh);
+ cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
+ memcpy(&cstate->current_fh.fh_handle.fh_raw, putfh->pf_fhval,
+ putfh->pf_fhlen);
+ ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+ if (ret == nfserr_stale && putfh->no_verify) {
+ SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
+ ret = 0;
+ }
+#endif
+ return ret;
+}
+
+static __be32
+nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ fh_put(&cstate->current_fh);
+
+ return exp_pseudoroot(rqstp, &cstate->current_fh);
+}
+
+static __be32
+nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ if (!cstate->save_fh.fh_dentry)
+ return nfserr_restorefh;
+
+ fh_dup2(&cstate->current_fh, &cstate->save_fh);
+ if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
+ memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
+ SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
+ }
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ fh_dup2(&cstate->save_fh, &cstate->current_fh);
+ if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
+ memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
+ SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
+ }
+ return nfs_ok;
+}
+
+/*
+ * misc nfsv4 ops
+ */
+static __be32
+nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_access *access = &u->access;
+ u32 access_full;
+
+ access_full = NFS3_ACCESS_FULL;
+ if (cstate->minorversion >= 2)
+ access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
+ NFS4_ACCESS_XAWRITE;
+
+ if (access->ac_req_access & ~access_full)
+ return nfserr_inval;
+
+ access->ac_resp_access = access->ac_req_access;
+ return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
+ &access->ac_supported);
+}
+
+static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
+{
+ __be32 *verf = (__be32 *)verifier->data;
+
+ BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
+
+ nfsd_copy_write_verifier(verf, net_generic(net, nfsd_net_id));
+}
+
+static __be32
+nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_commit *commit = &u->commit;
+ struct nfsd_file *nf;
+ __be32 status;
+
+ status = nfsd_file_acquire(rqstp, &cstate->current_fh, NFSD_MAY_WRITE |
+ NFSD_MAY_NOT_BREAK_LEASE, &nf);
+ if (status != nfs_ok)
+ return status;
+
+ status = nfsd_commit(rqstp, &cstate->current_fh, nf, commit->co_offset,
+ commit->co_count,
+ (__be32 *)commit->co_verf.data);
+ nfsd_file_put(nf);
+ return status;
+}
+
+static __be32
+nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_create *create = &u->create;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &create->cr_iattr,
+ .na_seclabel = &create->cr_label,
+ };
+ struct svc_fh resfh;
+ __be32 status;
+ dev_t rdev;
+
+ fh_init(&resfh, NFS4_FHSIZE);
+
+ status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
+ if (status)
+ return status;
+
+ status = check_attr_support(rqstp, cstate, create->cr_bmval,
+ nfsd_attrmask);
+ if (status)
+ return status;
+
+ status = nfsd4_acl_to_attr(create->cr_type, create->cr_acl, &attrs);
+ current->fs->umask = create->cr_umask;
+ switch (create->cr_type) {
+ case NF4LNK:
+ status = nfsd_symlink(rqstp, &cstate->current_fh,
+ create->cr_name, create->cr_namelen,
+ create->cr_data, &attrs, &resfh);
+ break;
+
+ case NF4BLK:
+ status = nfserr_inval;
+ rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
+ if (MAJOR(rdev) != create->cr_specdata1 ||
+ MINOR(rdev) != create->cr_specdata2)
+ goto out_umask;
+ status = nfsd_create(rqstp, &cstate->current_fh,
+ create->cr_name, create->cr_namelen,
+ &attrs, S_IFBLK, rdev, &resfh);
+ break;
+
+ case NF4CHR:
+ status = nfserr_inval;
+ rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
+ if (MAJOR(rdev) != create->cr_specdata1 ||
+ MINOR(rdev) != create->cr_specdata2)
+ goto out_umask;
+ status = nfsd_create(rqstp, &cstate->current_fh,
+ create->cr_name, create->cr_namelen,
+ &attrs, S_IFCHR, rdev, &resfh);
+ break;
+
+ case NF4SOCK:
+ status = nfsd_create(rqstp, &cstate->current_fh,
+ create->cr_name, create->cr_namelen,
+ &attrs, S_IFSOCK, 0, &resfh);
+ break;
+
+ case NF4FIFO:
+ status = nfsd_create(rqstp, &cstate->current_fh,
+ create->cr_name, create->cr_namelen,
+ &attrs, S_IFIFO, 0, &resfh);
+ break;
+
+ case NF4DIR:
+ create->cr_iattr.ia_valid &= ~ATTR_SIZE;
+ status = nfsd_create(rqstp, &cstate->current_fh,
+ create->cr_name, create->cr_namelen,
+ &attrs, S_IFDIR, 0, &resfh);
+ break;
+
+ default:
+ status = nfserr_badtype;
+ }
+
+ if (status)
+ goto out;
+
+ if (attrs.na_labelerr)
+ create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+ if (attrs.na_aclerr)
+ create->cr_bmval[0] &= ~FATTR4_WORD0_ACL;
+ set_change_info(&create->cr_cinfo, &cstate->current_fh);
+ fh_dup2(&cstate->current_fh, &resfh);
+out:
+ fh_put(&resfh);
+out_umask:
+ current->fs->umask = 0;
+ nfsd_attrs_free(&attrs);
+ return status;
+}
+
+static __be32
+nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_getattr *getattr = &u->getattr;
+ __be32 status;
+
+ status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
+ if (status)
+ return status;
+
+ if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
+ return nfserr_inval;
+
+ getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
+ getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
+ getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
+
+ getattr->ga_fhp = &cstate->current_fh;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_link *link = &u->link;
+ __be32 status;
+
+ status = nfsd_link(rqstp, &cstate->current_fh,
+ link->li_name, link->li_namelen, &cstate->save_fh);
+ if (!status)
+ set_change_info(&link->li_cinfo, &cstate->current_fh);
+ return status;
+}
+
+static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
+{
+ struct svc_fh tmp_fh;
+ __be32 ret;
+
+ fh_init(&tmp_fh, NFS4_FHSIZE);
+ ret = exp_pseudoroot(rqstp, &tmp_fh);
+ if (ret)
+ return ret;
+ if (tmp_fh.fh_dentry == fh->fh_dentry) {
+ fh_put(&tmp_fh);
+ return nfserr_noent;
+ }
+ fh_put(&tmp_fh);
+ return nfsd_lookup(rqstp, fh, "..", 2, fh);
+}
+
+static __be32
+nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
+}
+
+static __be32
+nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ return nfsd_lookup(rqstp, &cstate->current_fh,
+ u->lookup.lo_name, u->lookup.lo_len,
+ &cstate->current_fh);
+}
+
+static __be32
+nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_read *read = &u->read;
+ __be32 status;
+
+ read->rd_nf = NULL;
+
+ trace_nfsd_read_start(rqstp, &cstate->current_fh,
+ read->rd_offset, read->rd_length);
+
+ read->rd_length = min_t(u32, read->rd_length, svc_max_payload(rqstp));
+ if (read->rd_offset > (u64)OFFSET_MAX)
+ read->rd_offset = (u64)OFFSET_MAX;
+ if (read->rd_offset + read->rd_length > (u64)OFFSET_MAX)
+ read->rd_length = (u64)OFFSET_MAX - read->rd_offset;
+
+ /*
+ * If we do a zero copy read, then a client will see read data
+ * that reflects the state of the file *after* performing the
+ * following compound.
+ *
+ * To ensure proper ordering, we therefore turn off zero copy if
+ * the client wants us to do more in this compound:
+ */
+ if (!nfsd4_last_compound_op(rqstp))
+ clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
+
+ /* check stateid */
+ status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
+ &read->rd_stateid, RD_STATE,
+ &read->rd_nf, NULL);
+ if (status) {
+ dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
+ goto out;
+ }
+ status = nfs_ok;
+out:
+ read->rd_rqstp = rqstp;
+ read->rd_fhp = &cstate->current_fh;
+ return status;
+}
+
+
+static void
+nfsd4_read_release(union nfsd4_op_u *u)
+{
+ if (u->read.rd_nf)
+ nfsd_file_put(u->read.rd_nf);
+ trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
+ u->read.rd_offset, u->read.rd_length);
+}
+
+static __be32
+nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_readdir *readdir = &u->readdir;
+ u64 cookie = readdir->rd_cookie;
+ static const nfs4_verifier zeroverf;
+
+ /* no need to check permission - this will be done in nfsd_readdir() */
+
+ if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
+ return nfserr_inval;
+
+ readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
+ readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
+ readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
+
+ if ((cookie == 1) || (cookie == 2) ||
+ (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
+ return nfserr_bad_cookie;
+
+ readdir->rd_rqstp = rqstp;
+ readdir->rd_fhp = &cstate->current_fh;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ u->readlink.rl_rqstp = rqstp;
+ u->readlink.rl_fhp = &cstate->current_fh;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_remove *remove = &u->remove;
+ __be32 status;
+
+ if (opens_in_grace(SVC_NET(rqstp)))
+ return nfserr_grace;
+ status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
+ remove->rm_name, remove->rm_namelen);
+ if (!status)
+ set_change_info(&remove->rm_cinfo, &cstate->current_fh);
+ return status;
+}
+
+static __be32
+nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_rename *rename = &u->rename;
+ __be32 status;
+
+ if (opens_in_grace(SVC_NET(rqstp)))
+ return nfserr_grace;
+ status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
+ rename->rn_snamelen, &cstate->current_fh,
+ rename->rn_tname, rename->rn_tnamelen);
+ if (status)
+ return status;
+ set_change_info(&rename->rn_sinfo, &cstate->save_fh);
+ set_change_info(&rename->rn_tinfo, &cstate->current_fh);
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_secinfo *secinfo = &u->secinfo;
+ struct svc_export *exp;
+ struct dentry *dentry;
+ __be32 err;
+
+ err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
+ if (err)
+ return err;
+ err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
+ secinfo->si_name, secinfo->si_namelen,
+ &exp, &dentry);
+ if (err)
+ return err;
+ if (d_really_is_negative(dentry)) {
+ exp_put(exp);
+ err = nfserr_noent;
+ } else
+ secinfo->si_exp = exp;
+ dput(dentry);
+ if (cstate->minorversion)
+ /* See rfc 5661 section 2.6.3.1.1.8 */
+ fh_put(&cstate->current_fh);
+ return err;
+}
+
+static __be32
+nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ __be32 err;
+
+ switch (u->secinfo_no_name.sin_style) {
+ case NFS4_SECINFO_STYLE4_CURRENT_FH:
+ break;
+ case NFS4_SECINFO_STYLE4_PARENT:
+ err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
+ if (err)
+ return err;
+ break;
+ default:
+ return nfserr_inval;
+ }
+
+ u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
+ fh_put(&cstate->current_fh);
+ return nfs_ok;
+}
+
+static void
+nfsd4_secinfo_release(union nfsd4_op_u *u)
+{
+ if (u->secinfo.si_exp)
+ exp_put(u->secinfo.si_exp);
+}
+
+static void
+nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
+{
+ if (u->secinfo_no_name.sin_exp)
+ exp_put(u->secinfo_no_name.sin_exp);
+}
+
+static __be32
+nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_setattr *setattr = &u->setattr;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &setattr->sa_iattr,
+ .na_seclabel = &setattr->sa_label,
+ };
+ struct inode *inode;
+ __be32 status = nfs_ok;
+ int err;
+
+ if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
+ status = nfs4_preprocess_stateid_op(rqstp, cstate,
+ &cstate->current_fh, &setattr->sa_stateid,
+ WR_STATE, NULL, NULL);
+ if (status) {
+ dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
+ return status;
+ }
+ }
+ err = fh_want_write(&cstate->current_fh);
+ if (err)
+ return nfserrno(err);
+ status = nfs_ok;
+
+ status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
+ nfsd_attrmask);
+ if (status)
+ goto out;
+
+ inode = cstate->current_fh.fh_dentry->d_inode;
+ status = nfsd4_acl_to_attr(S_ISDIR(inode->i_mode) ? NF4DIR : NF4REG,
+ setattr->sa_acl, &attrs);
+
+ if (status)
+ goto out;
+ status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs,
+ 0, (time64_t)0);
+ if (!status)
+ status = nfserrno(attrs.na_labelerr);
+ if (!status)
+ status = nfserrno(attrs.na_aclerr);
+out:
+ nfsd_attrs_free(&attrs);
+ fh_drop_write(&cstate->current_fh);
+ return status;
+}
+
+static __be32
+nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_write *write = &u->write;
+ stateid_t *stateid = &write->wr_stateid;
+ struct nfsd_file *nf = NULL;
+ __be32 status = nfs_ok;
+ unsigned long cnt;
+ int nvecs;
+
+ if (write->wr_offset > (u64)OFFSET_MAX ||
+ write->wr_offset + write->wr_buflen > (u64)OFFSET_MAX)
+ return nfserr_fbig;
+
+ cnt = write->wr_buflen;
+ trace_nfsd_write_start(rqstp, &cstate->current_fh,
+ write->wr_offset, cnt);
+ status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
+ stateid, WR_STATE, &nf, NULL);
+ if (status) {
+ dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
+ return status;
+ }
+
+ write->wr_how_written = write->wr_stable_how;
+
+ nvecs = svc_fill_write_vector(rqstp, &write->wr_payload);
+ WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
+
+ status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
+ write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
+ write->wr_how_written,
+ (__be32 *)write->wr_verifier.data);
+ nfsd_file_put(nf);
+
+ write->wr_bytes_written = cnt;
+ trace_nfsd_write_done(rqstp, &cstate->current_fh,
+ write->wr_offset, cnt);
+ return status;
+}
+
+static __be32
+nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ stateid_t *src_stateid, struct nfsd_file **src,
+ stateid_t *dst_stateid, struct nfsd_file **dst)
+{
+ __be32 status;
+
+ if (!cstate->save_fh.fh_dentry)
+ return nfserr_nofilehandle;
+
+ status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
+ src_stateid, RD_STATE, src, NULL);
+ if (status) {
+ dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
+ goto out;
+ }
+
+ status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
+ dst_stateid, WR_STATE, dst, NULL);
+ if (status) {
+ dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
+ goto out_put_src;
+ }
+
+ /* fix up for NFS-specific error code */
+ if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
+ !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
+ status = nfserr_wrong_type;
+ goto out_put_dst;
+ }
+
+out:
+ return status;
+out_put_dst:
+ nfsd_file_put(*dst);
+ *dst = NULL;
+out_put_src:
+ nfsd_file_put(*src);
+ *src = NULL;
+ goto out;
+}
+
+static __be32
+nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_clone *clone = &u->clone;
+ struct nfsd_file *src, *dst;
+ __be32 status;
+
+ status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
+ &clone->cl_dst_stateid, &dst);
+ if (status)
+ goto out;
+
+ status = nfsd4_clone_file_range(rqstp, src, clone->cl_src_pos,
+ dst, clone->cl_dst_pos, clone->cl_count,
+ EX_ISSYNC(cstate->current_fh.fh_export));
+
+ nfsd_file_put(dst);
+ nfsd_file_put(src);
+out:
+ return status;
+}
+
+static void nfs4_put_copy(struct nfsd4_copy *copy)
+{
+ if (!refcount_dec_and_test(&copy->refcount))
+ return;
+ kfree(copy->cp_src);
+ kfree(copy);
+}
+
+static void nfsd4_stop_copy(struct nfsd4_copy *copy)
+{
+ if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, &copy->cp_flags))
+ kthread_stop(copy->copy_task);
+ nfs4_put_copy(copy);
+}
+
+static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
+{
+ struct nfsd4_copy *copy = NULL;
+
+ spin_lock(&clp->async_lock);
+ if (!list_empty(&clp->async_copies)) {
+ copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
+ copies);
+ refcount_inc(&copy->refcount);
+ }
+ spin_unlock(&clp->async_lock);
+ return copy;
+}
+
+void nfsd4_shutdown_copy(struct nfs4_client *clp)
+{
+ struct nfsd4_copy *copy;
+
+ while ((copy = nfsd4_get_copy(clp)) != NULL)
+ nfsd4_stop_copy(copy);
+}
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+
+extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
+ struct nfs_fh *src_fh,
+ nfs4_stateid *stateid);
+extern void nfs42_ssc_close(struct file *filep);
+
+extern void nfs_sb_deactive(struct super_block *sb);
+
+#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
+
+/*
+ * setup a work entry in the ssc delayed unmount list.
+ */
+static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr,
+ struct nfsd4_ssc_umount_item **nsui)
+{
+ struct nfsd4_ssc_umount_item *ni = NULL;
+ struct nfsd4_ssc_umount_item *work = NULL;
+ struct nfsd4_ssc_umount_item *tmp;
+ DEFINE_WAIT(wait);
+ __be32 status = 0;
+
+ *nsui = NULL;
+ work = kzalloc(sizeof(*work), GFP_KERNEL);
+try_again:
+ spin_lock(&nn->nfsd_ssc_lock);
+ list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
+ if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr)))
+ continue;
+ /* found a match */
+ if (ni->nsui_busy) {
+ /* wait - and try again */
+ prepare_to_wait(&nn->nfsd_ssc_waitq, &wait,
+ TASK_INTERRUPTIBLE);
+ spin_unlock(&nn->nfsd_ssc_lock);
+
+ /* allow 20secs for mount/unmount for now - revisit */
+ if (signal_pending(current) ||
+ (schedule_timeout(20*HZ) == 0)) {
+ finish_wait(&nn->nfsd_ssc_waitq, &wait);
+ kfree(work);
+ return nfserr_eagain;
+ }
+ finish_wait(&nn->nfsd_ssc_waitq, &wait);
+ goto try_again;
+ }
+ *nsui = ni;
+ refcount_inc(&ni->nsui_refcnt);
+ spin_unlock(&nn->nfsd_ssc_lock);
+ kfree(work);
+
+ /* return vfsmount in (*nsui)->nsui_vfsmount */
+ return 0;
+ }
+ if (work) {
+ strscpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr) - 1);
+ refcount_set(&work->nsui_refcnt, 2);
+ work->nsui_busy = true;
+ list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list);
+ *nsui = work;
+ } else
+ status = nfserr_resource;
+ spin_unlock(&nn->nfsd_ssc_lock);
+ return status;
+}
+
+static void nfsd4_ssc_update_dul(struct nfsd_net *nn,
+ struct nfsd4_ssc_umount_item *nsui,
+ struct vfsmount *ss_mnt)
+{
+ spin_lock(&nn->nfsd_ssc_lock);
+ nsui->nsui_vfsmount = ss_mnt;
+ nsui->nsui_busy = false;
+ wake_up_all(&nn->nfsd_ssc_waitq);
+ spin_unlock(&nn->nfsd_ssc_lock);
+}
+
+static void nfsd4_ssc_cancel_dul(struct nfsd_net *nn,
+ struct nfsd4_ssc_umount_item *nsui)
+{
+ spin_lock(&nn->nfsd_ssc_lock);
+ list_del(&nsui->nsui_list);
+ wake_up_all(&nn->nfsd_ssc_waitq);
+ spin_unlock(&nn->nfsd_ssc_lock);
+ kfree(nsui);
+}
+
+/*
+ * Support one copy source server for now.
+ */
+static __be32
+nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
+ struct nfsd4_ssc_umount_item **nsui)
+{
+ struct file_system_type *type;
+ struct vfsmount *ss_mnt;
+ struct nfs42_netaddr *naddr;
+ struct sockaddr_storage tmp_addr;
+ size_t tmp_addrlen, match_netid_len = 3;
+ char *startsep = "", *endsep = "", *match_netid = "tcp";
+ char *ipaddr, *dev_name, *raw_data;
+ int len, raw_len;
+ __be32 status = nfserr_inval;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+
+ naddr = &nss->u.nl4_addr;
+ tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
+ naddr->addr_len,
+ (struct sockaddr *)&tmp_addr,
+ sizeof(tmp_addr));
+ *nsui = NULL;
+ if (tmp_addrlen == 0)
+ goto out_err;
+
+ if (tmp_addr.ss_family == AF_INET6) {
+ startsep = "[";
+ endsep = "]";
+ match_netid = "tcp6";
+ match_netid_len = 4;
+ }
+
+ if (naddr->netid_len != match_netid_len ||
+ strncmp(naddr->netid, match_netid, naddr->netid_len))
+ goto out_err;
+
+ /* Construct the raw data for the vfs_kern_mount call */
+ len = RPC_MAX_ADDRBUFLEN + 1;
+ ipaddr = kzalloc(len, GFP_KERNEL);
+ if (!ipaddr)
+ goto out_err;
+
+ rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
+
+ /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
+
+ raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
+ raw_data = kzalloc(raw_len, GFP_KERNEL);
+ if (!raw_data)
+ goto out_free_ipaddr;
+
+ snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
+
+ status = nfserr_nodev;
+ type = get_fs_type("nfs");
+ if (!type)
+ goto out_free_rawdata;
+
+ /* Set the server:<export> for the vfs_kern_mount call */
+ dev_name = kzalloc(len + 5, GFP_KERNEL);
+ if (!dev_name)
+ goto out_free_rawdata;
+ snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
+
+ status = nfsd4_ssc_setup_dul(nn, ipaddr, nsui);
+ if (status)
+ goto out_free_devname;
+ if ((*nsui)->nsui_vfsmount)
+ goto out_done;
+
+ /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
+ ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
+ module_put(type->owner);
+ if (IS_ERR(ss_mnt)) {
+ status = nfserr_nodev;
+ nfsd4_ssc_cancel_dul(nn, *nsui);
+ goto out_free_devname;
+ }
+ nfsd4_ssc_update_dul(nn, *nsui, ss_mnt);
+out_done:
+ status = 0;
+
+out_free_devname:
+ kfree(dev_name);
+out_free_rawdata:
+ kfree(raw_data);
+out_free_ipaddr:
+ kfree(ipaddr);
+out_err:
+ return status;
+}
+
+/*
+ * Verify COPY destination stateid.
+ *
+ * Connect to the source server with NFSv4.1.
+ * Create the source struct file for nfsd_copy_range.
+ * Called with COPY cstate:
+ * SAVED_FH: source filehandle
+ * CURRENT_FH: destination filehandle
+ */
+static __be32
+nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_copy *copy)
+{
+ struct svc_fh *s_fh = NULL;
+ stateid_t *s_stid = &copy->cp_src_stateid;
+ __be32 status = nfserr_inval;
+
+ /* Verify the destination stateid and set dst struct file*/
+ status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
+ &copy->cp_dst_stateid,
+ WR_STATE, &copy->nf_dst, NULL);
+ if (status)
+ goto out;
+
+ status = nfsd4_interssc_connect(copy->cp_src, rqstp, &copy->ss_nsui);
+ if (status)
+ goto out;
+
+ s_fh = &cstate->save_fh;
+
+ copy->c_fh.size = s_fh->fh_handle.fh_size;
+ memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_raw, copy->c_fh.size);
+ copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
+ memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
+ sizeof(stateid_opaque_t));
+
+ status = 0;
+out:
+ return status;
+}
+
+static void
+nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp,
+ struct nfsd_file *dst)
+{
+ struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id);
+ long timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout);
+
+ nfs42_ssc_close(filp);
+ fput(filp);
+
+ spin_lock(&nn->nfsd_ssc_lock);
+ list_del(&nsui->nsui_list);
+ /*
+ * vfsmount can be shared by multiple exports,
+ * decrement refcnt. If the count drops to 1 it
+ * will be unmounted when nsui_expire expires.
+ */
+ refcount_dec(&nsui->nsui_refcnt);
+ nsui->nsui_expire = jiffies + timeout;
+ list_add_tail(&nsui->nsui_list, &nn->nfsd_ssc_mount_list);
+ spin_unlock(&nn->nfsd_ssc_lock);
+}
+
+#else /* CONFIG_NFSD_V4_2_INTER_SSC */
+
+static __be32
+nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_copy *copy)
+{
+ return nfserr_inval;
+}
+
+static void
+nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp,
+ struct nfsd_file *dst)
+{
+}
+
+static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
+ struct nfs_fh *src_fh,
+ nfs4_stateid *stateid)
+{
+ return NULL;
+}
+#endif /* CONFIG_NFSD_V4_2_INTER_SSC */
+
+static __be32
+nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_copy *copy)
+{
+ return nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid,
+ &copy->nf_src, &copy->cp_dst_stateid,
+ &copy->nf_dst);
+}
+
+static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
+{
+ struct nfsd4_cb_offload *cbo =
+ container_of(cb, struct nfsd4_cb_offload, co_cb);
+
+ kfree(cbo);
+}
+
+static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
+ struct rpc_task *task)
+{
+ struct nfsd4_cb_offload *cbo =
+ container_of(cb, struct nfsd4_cb_offload, co_cb);
+
+ trace_nfsd_cb_offload_done(&cbo->co_res.cb_stateid, task);
+ return 1;
+}
+
+static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
+ .release = nfsd4_cb_offload_release,
+ .done = nfsd4_cb_offload_done
+};
+
+static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
+{
+ copy->cp_res.wr_stable_how =
+ test_bit(NFSD4_COPY_F_COMMITTED, &copy->cp_flags) ?
+ NFS_FILE_SYNC : NFS_UNSTABLE;
+ nfsd4_copy_set_sync(copy, sync);
+ gen_boot_verifier(&copy->cp_res.wr_verifier, copy->cp_clp->net);
+}
+
+static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy,
+ struct file *dst,
+ struct file *src)
+{
+ errseq_t since;
+ ssize_t bytes_copied = 0;
+ u64 bytes_total = copy->cp_count;
+ u64 src_pos = copy->cp_src_pos;
+ u64 dst_pos = copy->cp_dst_pos;
+ int status;
+ loff_t end;
+
+ /* See RFC 7862 p.67: */
+ if (bytes_total == 0)
+ bytes_total = ULLONG_MAX;
+ do {
+ if (kthread_should_stop())
+ break;
+ bytes_copied = nfsd_copy_file_range(src, src_pos, dst, dst_pos,
+ bytes_total);
+ if (bytes_copied <= 0)
+ break;
+ bytes_total -= bytes_copied;
+ copy->cp_res.wr_bytes_written += bytes_copied;
+ src_pos += bytes_copied;
+ dst_pos += bytes_copied;
+ } while (bytes_total > 0 && nfsd4_copy_is_async(copy));
+ /* for a non-zero asynchronous copy do a commit of data */
+ if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) {
+ since = READ_ONCE(dst->f_wb_err);
+ end = copy->cp_dst_pos + copy->cp_res.wr_bytes_written - 1;
+ status = vfs_fsync_range(dst, copy->cp_dst_pos, end, 0);
+ if (!status)
+ status = filemap_check_wb_err(dst->f_mapping, since);
+ if (!status)
+ set_bit(NFSD4_COPY_F_COMMITTED, &copy->cp_flags);
+ }
+ return bytes_copied;
+}
+
+static __be32 nfsd4_do_copy(struct nfsd4_copy *copy,
+ struct file *src, struct file *dst,
+ bool sync)
+{
+ __be32 status;
+ ssize_t bytes;
+
+ bytes = _nfsd_copy_file_range(copy, dst, src);
+
+ /* for async copy, we ignore the error, client can always retry
+ * to get the error
+ */
+ if (bytes < 0 && !copy->cp_res.wr_bytes_written)
+ status = nfserrno(bytes);
+ else {
+ nfsd4_init_copy_res(copy, sync);
+ status = nfs_ok;
+ }
+ return status;
+}
+
+static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
+{
+ dst->cp_src_pos = src->cp_src_pos;
+ dst->cp_dst_pos = src->cp_dst_pos;
+ dst->cp_count = src->cp_count;
+ dst->cp_flags = src->cp_flags;
+ memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
+ memcpy(&dst->fh, &src->fh, sizeof(src->fh));
+ dst->cp_clp = src->cp_clp;
+ dst->nf_dst = nfsd_file_get(src->nf_dst);
+ /* for inter, nf_src doesn't exist yet */
+ if (!nfsd4_ssc_is_inter(src))
+ dst->nf_src = nfsd_file_get(src->nf_src);
+
+ memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
+ memcpy(dst->cp_src, src->cp_src, sizeof(struct nl4_server));
+ memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
+ memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
+ dst->ss_nsui = src->ss_nsui;
+}
+
+static void release_copy_files(struct nfsd4_copy *copy)
+{
+ if (copy->nf_src)
+ nfsd_file_put(copy->nf_src);
+ if (copy->nf_dst)
+ nfsd_file_put(copy->nf_dst);
+}
+
+static void cleanup_async_copy(struct nfsd4_copy *copy)
+{
+ nfs4_free_copy_state(copy);
+ release_copy_files(copy);
+ if (copy->cp_clp) {
+ spin_lock(&copy->cp_clp->async_lock);
+ if (!list_empty(&copy->copies))
+ list_del_init(&copy->copies);
+ spin_unlock(&copy->cp_clp->async_lock);
+ }
+ nfs4_put_copy(copy);
+}
+
+static void nfsd4_send_cb_offload(struct nfsd4_copy *copy, __be32 nfserr)
+{
+ struct nfsd4_cb_offload *cbo;
+
+ cbo = kzalloc(sizeof(*cbo), GFP_KERNEL);
+ if (!cbo)
+ return;
+
+ memcpy(&cbo->co_res, &copy->cp_res, sizeof(copy->cp_res));
+ memcpy(&cbo->co_fh, &copy->fh, sizeof(copy->fh));
+ cbo->co_nfserr = nfserr;
+
+ nfsd4_init_cb(&cbo->co_cb, copy->cp_clp, &nfsd4_cb_offload_ops,
+ NFSPROC4_CLNT_CB_OFFLOAD);
+ trace_nfsd_cb_offload(copy->cp_clp, &cbo->co_res.cb_stateid,
+ &cbo->co_fh, copy->cp_count, nfserr);
+ nfsd4_run_cb(&cbo->co_cb);
+}
+
+/**
+ * nfsd4_do_async_copy - kthread function for background server-side COPY
+ * @data: arguments for COPY operation
+ *
+ * Return values:
+ * %0: Copy operation is done.
+ */
+static int nfsd4_do_async_copy(void *data)
+{
+ struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
+ __be32 nfserr;
+
+ if (nfsd4_ssc_is_inter(copy)) {
+ struct file *filp;
+
+ filp = nfs42_ssc_open(copy->ss_nsui->nsui_vfsmount,
+ &copy->c_fh, &copy->stateid);
+ if (IS_ERR(filp)) {
+ switch (PTR_ERR(filp)) {
+ case -EBADF:
+ nfserr = nfserr_wrong_type;
+ break;
+ default:
+ nfserr = nfserr_offload_denied;
+ }
+ /* ss_mnt will be unmounted by the laundromat */
+ goto do_callback;
+ }
+ nfserr = nfsd4_do_copy(copy, filp, copy->nf_dst->nf_file,
+ false);
+ nfsd4_cleanup_inter_ssc(copy->ss_nsui, filp, copy->nf_dst);
+ } else {
+ nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file,
+ copy->nf_dst->nf_file, false);
+ }
+
+do_callback:
+ nfsd4_send_cb_offload(copy, nfserr);
+ cleanup_async_copy(copy);
+ return 0;
+}
+
+static __be32
+nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_copy *copy = &u->copy;
+ __be32 status;
+ struct nfsd4_copy *async_copy = NULL;
+
+ if (nfsd4_ssc_is_inter(copy)) {
+ if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) {
+ status = nfserr_notsupp;
+ goto out;
+ }
+ status = nfsd4_setup_inter_ssc(rqstp, cstate, copy);
+ if (status)
+ return nfserr_offload_denied;
+ } else {
+ status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
+ if (status)
+ return status;
+ }
+
+ copy->cp_clp = cstate->clp;
+ memcpy(&copy->fh, &cstate->current_fh.fh_handle,
+ sizeof(struct knfsd_fh));
+ if (nfsd4_copy_is_async(copy)) {
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+
+ status = nfserrno(-ENOMEM);
+ async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
+ if (!async_copy)
+ goto out_err;
+ INIT_LIST_HEAD(&async_copy->copies);
+ refcount_set(&async_copy->refcount, 1);
+ async_copy->cp_src = kmalloc(sizeof(*async_copy->cp_src), GFP_KERNEL);
+ if (!async_copy->cp_src)
+ goto out_err;
+ if (!nfs4_init_copy_state(nn, copy))
+ goto out_err;
+ memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid.cs_stid,
+ sizeof(copy->cp_res.cb_stateid));
+ dup_copy_fields(copy, async_copy);
+ async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
+ async_copy, "%s", "copy thread");
+ if (IS_ERR(async_copy->copy_task))
+ goto out_err;
+ spin_lock(&async_copy->cp_clp->async_lock);
+ list_add(&async_copy->copies,
+ &async_copy->cp_clp->async_copies);
+ spin_unlock(&async_copy->cp_clp->async_lock);
+ wake_up_process(async_copy->copy_task);
+ status = nfs_ok;
+ } else {
+ status = nfsd4_do_copy(copy, copy->nf_src->nf_file,
+ copy->nf_dst->nf_file, true);
+ }
+out:
+ release_copy_files(copy);
+ return status;
+out_err:
+ if (nfsd4_ssc_is_inter(copy)) {
+ /*
+ * Source's vfsmount of inter-copy will be unmounted
+ * by the laundromat. Use copy instead of async_copy
+ * since async_copy->ss_nsui might not be set yet.
+ */
+ refcount_dec(&copy->ss_nsui->nsui_refcnt);
+ }
+ if (async_copy)
+ cleanup_async_copy(async_copy);
+ status = nfserrno(-ENOMEM);
+ goto out;
+}
+
+struct nfsd4_copy *
+find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
+{
+ struct nfsd4_copy *copy;
+
+ spin_lock(&clp->async_lock);
+ list_for_each_entry(copy, &clp->async_copies, copies) {
+ if (memcmp(&copy->cp_stateid.cs_stid, stateid, NFS4_STATEID_SIZE))
+ continue;
+ refcount_inc(&copy->refcount);
+ spin_unlock(&clp->async_lock);
+ return copy;
+ }
+ spin_unlock(&clp->async_lock);
+ return NULL;
+}
+
+static __be32
+nfsd4_offload_cancel(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_offload_status *os = &u->offload_status;
+ struct nfsd4_copy *copy;
+ struct nfs4_client *clp = cstate->clp;
+
+ copy = find_async_copy(clp, &os->stateid);
+ if (!copy) {
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+
+ return manage_cpntf_state(nn, &os->stateid, clp, NULL);
+ } else
+ nfsd4_stop_copy(copy);
+
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_copy_notify *cn = &u->copy_notify;
+ __be32 status;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+ struct nfs4_stid *stid;
+ struct nfs4_cpntf_state *cps;
+ struct nfs4_client *clp = cstate->clp;
+
+ status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
+ &cn->cpn_src_stateid, RD_STATE, NULL,
+ &stid);
+ if (status)
+ return status;
+
+ cn->cpn_sec = nn->nfsd4_lease;
+ cn->cpn_nsec = 0;
+
+ status = nfserrno(-ENOMEM);
+ cps = nfs4_alloc_init_cpntf_state(nn, stid);
+ if (!cps)
+ goto out;
+ memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.cs_stid, sizeof(stateid_t));
+ memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
+ memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
+
+ /* For now, only return one server address in cpn_src, the
+ * address used by the client to connect to this server.
+ */
+ cn->cpn_src->nl4_type = NL4_NETADDR;
+ status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
+ &cn->cpn_src->u.nl4_addr);
+ WARN_ON_ONCE(status);
+ if (status) {
+ nfs4_put_cpntf_state(nn, cps);
+ goto out;
+ }
+out:
+ nfs4_put_stid(stid);
+ return status;
+}
+
+static __be32
+nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_fallocate *fallocate, int flags)
+{
+ __be32 status;
+ struct nfsd_file *nf;
+
+ status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
+ &fallocate->falloc_stateid,
+ WR_STATE, &nf, NULL);
+ if (status != nfs_ok) {
+ dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
+ return status;
+ }
+
+ status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
+ fallocate->falloc_offset,
+ fallocate->falloc_length,
+ flags);
+ nfsd_file_put(nf);
+ return status;
+}
+static __be32
+nfsd4_offload_status(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_offload_status *os = &u->offload_status;
+ __be32 status = 0;
+ struct nfsd4_copy *copy;
+ struct nfs4_client *clp = cstate->clp;
+
+ copy = find_async_copy(clp, &os->stateid);
+ if (copy) {
+ os->count = copy->cp_res.wr_bytes_written;
+ nfs4_put_copy(copy);
+ } else
+ status = nfserr_bad_stateid;
+
+ return status;
+}
+
+static __be32
+nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
+}
+
+static __be32
+nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
+ FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
+}
+
+static __be32
+nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_seek *seek = &u->seek;
+ int whence;
+ __be32 status;
+ struct nfsd_file *nf;
+
+ status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
+ &seek->seek_stateid,
+ RD_STATE, &nf, NULL);
+ if (status) {
+ dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
+ return status;
+ }
+
+ switch (seek->seek_whence) {
+ case NFS4_CONTENT_DATA:
+ whence = SEEK_DATA;
+ break;
+ case NFS4_CONTENT_HOLE:
+ whence = SEEK_HOLE;
+ break;
+ default:
+ status = nfserr_union_notsupp;
+ goto out;
+ }
+
+ /*
+ * Note: This call does change file->f_pos, but nothing in NFSD
+ * should ever file->f_pos.
+ */
+ seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
+ if (seek->seek_pos < 0)
+ status = nfserrno(seek->seek_pos);
+ else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
+ seek->seek_eof = true;
+
+out:
+ nfsd_file_put(nf);
+ return status;
+}
+
+/* This routine never returns NFS_OK! If there are no other errors, it
+ * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
+ * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
+ * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
+ */
+static __be32
+_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_verify *verify)
+{
+ __be32 *buf, *p;
+ int count;
+ __be32 status;
+
+ status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
+ if (status)
+ return status;
+
+ status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
+ if (status)
+ return status;
+
+ if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
+ || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
+ return nfserr_inval;
+ if (verify->ve_attrlen & 3)
+ return nfserr_inval;
+
+ /* count in words:
+ * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
+ */
+ count = 4 + (verify->ve_attrlen >> 2);
+ buf = kmalloc(count << 2, GFP_KERNEL);
+ if (!buf)
+ return nfserr_jukebox;
+
+ p = buf;
+ status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
+ cstate->current_fh.fh_export,
+ cstate->current_fh.fh_dentry,
+ verify->ve_bmval,
+ rqstp, 0);
+ /*
+ * If nfsd4_encode_fattr() ran out of space, assume that's because
+ * the attributes are longer (hence different) than those given:
+ */
+ if (status == nfserr_resource)
+ status = nfserr_not_same;
+ if (status)
+ goto out_kfree;
+
+ /* skip bitmap */
+ p = buf + 1 + ntohl(buf[0]);
+ status = nfserr_not_same;
+ if (ntohl(*p++) != verify->ve_attrlen)
+ goto out_kfree;
+ if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
+ status = nfserr_same;
+
+out_kfree:
+ kfree(buf);
+ return status;
+}
+
+static __be32
+nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ __be32 status;
+
+ status = _nfsd4_verify(rqstp, cstate, &u->verify);
+ return status == nfserr_not_same ? nfs_ok : status;
+}
+
+static __be32
+nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ __be32 status;
+
+ status = _nfsd4_verify(rqstp, cstate, &u->nverify);
+ return status == nfserr_same ? nfs_ok : status;
+}
+
+#ifdef CONFIG_NFSD_PNFS
+static const struct nfsd4_layout_ops *
+nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
+{
+ if (!exp->ex_layout_types) {
+ dprintk("%s: export does not support pNFS\n", __func__);
+ return NULL;
+ }
+
+ if (layout_type >= LAYOUT_TYPE_MAX ||
+ !(exp->ex_layout_types & (1 << layout_type))) {
+ dprintk("%s: layout type %d not supported\n",
+ __func__, layout_type);
+ return NULL;
+ }
+
+ return nfsd4_layout_ops[layout_type];
+}
+
+static __be32
+nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
+{
+ struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
+ const struct nfsd4_layout_ops *ops;
+ struct nfsd4_deviceid_map *map;
+ struct svc_export *exp;
+ __be32 nfserr;
+
+ dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
+ __func__,
+ gdp->gd_layout_type,
+ gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
+ gdp->gd_maxcount);
+
+ map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
+ if (!map) {
+ dprintk("%s: couldn't find device ID to export mapping!\n",
+ __func__);
+ return nfserr_noent;
+ }
+
+ exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
+ if (IS_ERR(exp)) {
+ dprintk("%s: could not find device id\n", __func__);
+ return nfserr_noent;
+ }
+
+ nfserr = nfserr_layoutunavailable;
+ ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
+ if (!ops)
+ goto out;
+
+ nfserr = nfs_ok;
+ if (gdp->gd_maxcount != 0) {
+ nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
+ rqstp, cstate->clp, gdp);
+ }
+
+ gdp->gd_notify_types &= ops->notify_types;
+out:
+ exp_put(exp);
+ return nfserr;
+}
+
+static void
+nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
+{
+ kfree(u->getdeviceinfo.gd_device);
+}
+
+static __be32
+nfsd4_layoutget(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
+{
+ struct nfsd4_layoutget *lgp = &u->layoutget;
+ struct svc_fh *current_fh = &cstate->current_fh;
+ const struct nfsd4_layout_ops *ops;
+ struct nfs4_layout_stateid *ls;
+ __be32 nfserr;
+ int accmode = NFSD_MAY_READ_IF_EXEC;
+
+ switch (lgp->lg_seg.iomode) {
+ case IOMODE_READ:
+ accmode |= NFSD_MAY_READ;
+ break;
+ case IOMODE_RW:
+ accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
+ break;
+ default:
+ dprintk("%s: invalid iomode %d\n",
+ __func__, lgp->lg_seg.iomode);
+ nfserr = nfserr_badiomode;
+ goto out;
+ }
+
+ nfserr = fh_verify(rqstp, current_fh, 0, accmode);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_layoutunavailable;
+ ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
+ if (!ops)
+ goto out;
+
+ /*
+ * Verify minlength and range as per RFC5661:
+ * o If loga_length is less than loga_minlength,
+ * the metadata server MUST return NFS4ERR_INVAL.
+ * o If the sum of loga_offset and loga_minlength exceeds
+ * NFS4_UINT64_MAX, and loga_minlength is not
+ * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
+ * o If the sum of loga_offset and loga_length exceeds
+ * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
+ * the error NFS4ERR_INVAL MUST result.
+ */
+ nfserr = nfserr_inval;
+ if (lgp->lg_seg.length < lgp->lg_minlength ||
+ (lgp->lg_minlength != NFS4_MAX_UINT64 &&
+ lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
+ (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
+ lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
+ goto out;
+ if (lgp->lg_seg.length == 0)
+ goto out;
+
+ nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
+ true, lgp->lg_layout_type, &ls);
+ if (nfserr) {
+ trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
+ goto out;
+ }
+
+ nfserr = nfserr_recallconflict;
+ if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
+ goto out_put_stid;
+
+ nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
+ current_fh, lgp);
+ if (nfserr)
+ goto out_put_stid;
+
+ nfserr = nfsd4_insert_layout(lgp, ls);
+
+out_put_stid:
+ mutex_unlock(&ls->ls_mutex);
+ nfs4_put_stid(&ls->ls_stid);
+out:
+ return nfserr;
+}
+
+static void
+nfsd4_layoutget_release(union nfsd4_op_u *u)
+{
+ kfree(u->layoutget.lg_content);
+}
+
+static __be32
+nfsd4_layoutcommit(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
+{
+ struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
+ const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
+ struct svc_fh *current_fh = &cstate->current_fh;
+ const struct nfsd4_layout_ops *ops;
+ loff_t new_size = lcp->lc_last_wr + 1;
+ struct inode *inode;
+ struct nfs4_layout_stateid *ls;
+ __be32 nfserr;
+
+ nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_layoutunavailable;
+ ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
+ if (!ops)
+ goto out;
+ inode = d_inode(current_fh->fh_dentry);
+
+ nfserr = nfserr_inval;
+ if (new_size <= seg->offset) {
+ dprintk("pnfsd: last write before layout segment\n");
+ goto out;
+ }
+ if (new_size > seg->offset + seg->length) {
+ dprintk("pnfsd: last write beyond layout segment\n");
+ goto out;
+ }
+ if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
+ dprintk("pnfsd: layoutcommit beyond EOF\n");
+ goto out;
+ }
+
+ nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
+ false, lcp->lc_layout_type,
+ &ls);
+ if (nfserr) {
+ trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
+ /* fixup error code as per RFC5661 */
+ if (nfserr == nfserr_bad_stateid)
+ nfserr = nfserr_badlayout;
+ goto out;
+ }
+
+ /* LAYOUTCOMMIT does not require any serialization */
+ mutex_unlock(&ls->ls_mutex);
+
+ if (new_size > i_size_read(inode)) {
+ lcp->lc_size_chg = 1;
+ lcp->lc_newsize = new_size;
+ } else {
+ lcp->lc_size_chg = 0;
+ }
+
+ nfserr = ops->proc_layoutcommit(inode, lcp);
+ nfs4_put_stid(&ls->ls_stid);
+out:
+ return nfserr;
+}
+
+static __be32
+nfsd4_layoutreturn(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
+{
+ struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
+ struct svc_fh *current_fh = &cstate->current_fh;
+ __be32 nfserr;
+
+ nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
+ if (nfserr)
+ goto out;
+
+ nfserr = nfserr_layoutunavailable;
+ if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
+ goto out;
+
+ switch (lrp->lr_seg.iomode) {
+ case IOMODE_READ:
+ case IOMODE_RW:
+ case IOMODE_ANY:
+ break;
+ default:
+ dprintk("%s: invalid iomode %d\n", __func__,
+ lrp->lr_seg.iomode);
+ nfserr = nfserr_inval;
+ goto out;
+ }
+
+ switch (lrp->lr_return_type) {
+ case RETURN_FILE:
+ nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
+ break;
+ case RETURN_FSID:
+ case RETURN_ALL:
+ nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
+ break;
+ default:
+ dprintk("%s: invalid return_type %d\n", __func__,
+ lrp->lr_return_type);
+ nfserr = nfserr_inval;
+ break;
+ }
+out:
+ return nfserr;
+}
+#endif /* CONFIG_NFSD_PNFS */
+
+static __be32
+nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_getxattr *getxattr = &u->getxattr;
+
+ return nfsd_getxattr(rqstp, &cstate->current_fh,
+ getxattr->getxa_name, &getxattr->getxa_buf,
+ &getxattr->getxa_len);
+}
+
+static __be32
+nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_setxattr *setxattr = &u->setxattr;
+ __be32 ret;
+
+ if (opens_in_grace(SVC_NET(rqstp)))
+ return nfserr_grace;
+
+ ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
+ setxattr->setxa_buf, setxattr->setxa_len,
+ setxattr->setxa_flags);
+
+ if (!ret)
+ set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
+
+ return ret;
+}
+
+static __be32
+nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ /*
+ * Get the entire list, then copy out only the user attributes
+ * in the encode function.
+ */
+ return nfsd_listxattr(rqstp, &cstate->current_fh,
+ &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
+}
+
+static __be32
+nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_removexattr *removexattr = &u->removexattr;
+ __be32 ret;
+
+ if (opens_in_grace(SVC_NET(rqstp)))
+ return nfserr_grace;
+
+ ret = nfsd_removexattr(rqstp, &cstate->current_fh,
+ removexattr->rmxa_name);
+
+ if (!ret)
+ set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
+
+ return ret;
+}
+
+/*
+ * NULL call.
+ */
+static __be32
+nfsd4_proc_null(struct svc_rqst *rqstp)
+{
+ return rpc_success;
+}
+
+static inline void nfsd4_increment_op_stats(u32 opnum)
+{
+ if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]);
+}
+
+static const struct nfsd4_operation nfsd4_ops[];
+
+static const char *nfsd4_op_name(unsigned opnum);
+
+/*
+ * Enforce NFSv4.1 COMPOUND ordering rules:
+ *
+ * Also note, enforced elsewhere:
+ * - SEQUENCE other than as first op results in
+ * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
+ * - BIND_CONN_TO_SESSION must be the only op in its compound.
+ * (Enforced in nfsd4_bind_conn_to_session().)
+ * - DESTROY_SESSION must be the final operation in a compound, if
+ * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
+ * (Enforced in nfsd4_destroy_session().)
+ */
+static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
+{
+ struct nfsd4_op *first_op = &args->ops[0];
+
+ /* These ordering requirements don't apply to NFSv4.0: */
+ if (args->minorversion == 0)
+ return nfs_ok;
+ /* This is weird, but OK, not our problem: */
+ if (args->opcnt == 0)
+ return nfs_ok;
+ if (first_op->status == nfserr_op_illegal)
+ return nfs_ok;
+ if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
+ return nfserr_op_not_in_session;
+ if (first_op->opnum == OP_SEQUENCE)
+ return nfs_ok;
+ /*
+ * So first_op is something allowed outside a session, like
+ * EXCHANGE_ID; but then it has to be the only op in the
+ * compound:
+ */
+ if (args->opcnt != 1)
+ return nfserr_not_only_op;
+ return nfs_ok;
+}
+
+const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
+{
+ return &nfsd4_ops[op->opnum];
+}
+
+bool nfsd4_cache_this_op(struct nfsd4_op *op)
+{
+ if (op->opnum == OP_ILLEGAL)
+ return false;
+ return OPDESC(op)->op_flags & OP_CACHEME;
+}
+
+static bool need_wrongsec_check(struct svc_rqst *rqstp)
+{
+ struct nfsd4_compoundres *resp = rqstp->rq_resp;
+ struct nfsd4_compoundargs *argp = rqstp->rq_argp;
+ struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
+ struct nfsd4_op *next = &argp->ops[resp->opcnt];
+ const struct nfsd4_operation *thisd = OPDESC(this);
+ const struct nfsd4_operation *nextd;
+
+ /*
+ * Most ops check wronsec on our own; only the putfh-like ops
+ * have special rules.
+ */
+ if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
+ return false;
+ /*
+ * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
+ * put-filehandle operation if we're not going to use the
+ * result:
+ */
+ if (argp->opcnt == resp->opcnt)
+ return false;
+ if (next->opnum == OP_ILLEGAL)
+ return false;
+ nextd = OPDESC(next);
+ /*
+ * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
+ * errors themselves as necessary; others should check for them
+ * now:
+ */
+ return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
+}
+
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+static void
+check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
+{
+ struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
+ struct nfsd4_copy *copy;
+ struct nfsd4_putfh *putfh;
+ int i;
+
+ /* traverse all operation and if it's a COPY compound, mark the
+ * source filehandle to skip verification
+ */
+ for (i = 0; i < args->opcnt; i++) {
+ op = &args->ops[i];
+ if (op->opnum == OP_PUTFH)
+ current_op = op;
+ else if (op->opnum == OP_SAVEFH)
+ saved_op = current_op;
+ else if (op->opnum == OP_RESTOREFH)
+ current_op = saved_op;
+ else if (op->opnum == OP_COPY) {
+ copy = (struct nfsd4_copy *)&op->u;
+ if (!saved_op) {
+ op->status = nfserr_nofilehandle;
+ return;
+ }
+ putfh = (struct nfsd4_putfh *)&saved_op->u;
+ if (nfsd4_ssc_is_inter(copy))
+ putfh->no_verify = true;
+ }
+ }
+}
+#else
+static void
+check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
+{
+}
+#endif
+
+/*
+ * COMPOUND call.
+ */
+static __be32
+nfsd4_proc_compound(struct svc_rqst *rqstp)
+{
+ struct nfsd4_compoundargs *args = rqstp->rq_argp;
+ struct nfsd4_compoundres *resp = rqstp->rq_resp;
+ struct nfsd4_op *op;
+ struct nfsd4_compound_state *cstate = &resp->cstate;
+ struct svc_fh *current_fh = &cstate->current_fh;
+ struct svc_fh *save_fh = &cstate->save_fh;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+ __be32 status;
+
+ resp->xdr = &rqstp->rq_res_stream;
+ resp->statusp = resp->xdr->p;
+
+ /* reserve space for: NFS status code */
+ xdr_reserve_space(resp->xdr, XDR_UNIT);
+
+ /* reserve space for: taglen, tag, and opcnt */
+ xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen);
+ resp->taglen = args->taglen;
+ resp->tag = args->tag;
+ resp->rqstp = rqstp;
+ cstate->minorversion = args->minorversion;
+ fh_init(current_fh, NFS4_FHSIZE);
+ fh_init(save_fh, NFS4_FHSIZE);
+ /*
+ * Don't use the deferral mechanism for NFSv4; compounds make it
+ * too hard to avoid non-idempotency problems.
+ */
+ clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
+
+ /*
+ * According to RFC3010, this takes precedence over all other errors.
+ */
+ status = nfserr_minor_vers_mismatch;
+ if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
+ goto out;
+
+ status = nfs41_check_op_ordering(args);
+ if (status) {
+ op = &args->ops[0];
+ op->status = status;
+ resp->opcnt = 1;
+ goto encode_op;
+ }
+ check_if_stalefh_allowed(args);
+
+ rqstp->rq_lease_breaker = (void **)&cstate->clp;
+
+ trace_nfsd_compound(rqstp, args->tag, args->taglen, args->client_opcnt);
+ while (!status && resp->opcnt < args->opcnt) {
+ op = &args->ops[resp->opcnt++];
+
+ if (unlikely(resp->opcnt == NFSD_MAX_OPS_PER_COMPOUND)) {
+ /* If there are still more operations to process,
+ * stop here and report NFS4ERR_RESOURCE. */
+ if (cstate->minorversion == 0 &&
+ args->client_opcnt > resp->opcnt) {
+ op->status = nfserr_resource;
+ goto encode_op;
+ }
+ }
+
+ /*
+ * The XDR decode routines may have pre-set op->status;
+ * for example, if there is a miscellaneous XDR error
+ * it will be set to nfserr_bad_xdr.
+ */
+ if (op->status) {
+ if (op->opnum == OP_OPEN)
+ op->status = nfsd4_open_omfg(rqstp, cstate, op);
+ goto encode_op;
+ }
+ if (!current_fh->fh_dentry &&
+ !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
+ if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
+ op->status = nfserr_nofilehandle;
+ goto encode_op;
+ }
+ } else if (current_fh->fh_export &&
+ current_fh->fh_export->ex_fslocs.migrated &&
+ !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
+ op->status = nfserr_moved;
+ goto encode_op;
+ }
+
+ fh_clear_pre_post_attrs(current_fh);
+
+ /* If op is non-idempotent */
+ if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
+ /*
+ * Don't execute this op if we couldn't encode a
+ * successful reply:
+ */
+ u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
+ /*
+ * Plus if there's another operation, make sure
+ * we'll have space to at least encode an error:
+ */
+ if (resp->opcnt < args->opcnt)
+ plen += COMPOUND_ERR_SLACK_SPACE;
+ op->status = nfsd4_check_resp_size(resp, plen);
+ }
+
+ if (op->status)
+ goto encode_op;
+
+ if (op->opdesc->op_get_currentstateid)
+ op->opdesc->op_get_currentstateid(cstate, &op->u);
+ op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
+
+ /* Only from SEQUENCE */
+ if (cstate->status == nfserr_replay_cache) {
+ dprintk("%s NFS4.1 replay from cache\n", __func__);
+ status = op->status;
+ goto out;
+ }
+ if (!op->status) {
+ if (op->opdesc->op_set_currentstateid)
+ op->opdesc->op_set_currentstateid(cstate, &op->u);
+
+ if (op->opdesc->op_flags & OP_CLEAR_STATEID)
+ clear_current_stateid(cstate);
+
+ if (current_fh->fh_export &&
+ need_wrongsec_check(rqstp))
+ op->status = check_nfsd_access(current_fh->fh_export, rqstp);
+ }
+encode_op:
+ if (op->status == nfserr_replay_me) {
+ op->replay = &cstate->replay_owner->so_replay;
+ nfsd4_encode_replay(resp->xdr, op);
+ status = op->status = op->replay->rp_status;
+ } else {
+ nfsd4_encode_operation(resp, op);
+ status = op->status;
+ }
+
+ trace_nfsd_compound_status(args->client_opcnt, resp->opcnt,
+ status, nfsd4_op_name(op->opnum));
+
+ nfsd4_cstate_clear_replay(cstate);
+ nfsd4_increment_op_stats(op->opnum);
+ }
+
+ fh_put(current_fh);
+ fh_put(save_fh);
+ BUG_ON(cstate->replay_owner);
+out:
+ cstate->status = status;
+ /* Reset deferral mechanism for RPC deferrals */
+ set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
+ return rpc_success;
+}
+
+#define op_encode_hdr_size (2)
+#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
+#define op_encode_change_info_maxsz (5)
+#define nfs4_fattr_bitmap_maxsz (4)
+
+/* We'll fall back on returning no lockowner if run out of space: */
+#define op_encode_lockowner_maxsz (0)
+#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
+
+#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
+
+#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
+#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
+ op_encode_ace_maxsz)
+
+#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
+
+/*
+ * The _rsize() helpers are invoked by the NFSv4 COMPOUND decoder, which
+ * is called before sunrpc sets rq_res.buflen. Thus we have to compute
+ * the maximum payload size here, based on transport limits and the size
+ * of the remaining space in the rq_pages array.
+ */
+static u32 nfsd4_max_payload(const struct svc_rqst *rqstp)
+{
+ u32 buflen;
+
+ buflen = (rqstp->rq_page_end - rqstp->rq_next_page) * PAGE_SIZE;
+ buflen -= rqstp->rq_auth_slack;
+ buflen -= rqstp->rq_res.head[0].iov_len;
+ return min_t(u32, buflen, svc_max_payload(rqstp));
+}
+
+static u32 nfsd4_only_status_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size) * sizeof(__be32);
+}
+
+static u32 nfsd4_status_stateid_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
+}
+
+static u32 nfsd4_access_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ /* ac_supported, ac_resp_access */
+ return (op_encode_hdr_size + 2)* sizeof(__be32);
+}
+
+static u32 nfsd4_commit_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
+}
+
+static u32 nfsd4_create_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_change_info_maxsz
+ + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
+}
+
+/*
+ * Note since this is an idempotent operation we won't insist on failing
+ * the op prematurely if the estimate is too large. We may turn off splice
+ * reads unnecessarily.
+ */
+static u32 nfsd4_getattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ const u32 *bmap = op->u.getattr.ga_bmval;
+ u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
+ u32 ret = 0;
+
+ if (bmap0 & FATTR4_WORD0_ACL)
+ return nfsd4_max_payload(rqstp);
+ if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
+ return nfsd4_max_payload(rqstp);
+
+ if (bmap1 & FATTR4_WORD1_OWNER) {
+ ret += IDMAP_NAMESZ + 4;
+ bmap1 &= ~FATTR4_WORD1_OWNER;
+ }
+ if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
+ ret += IDMAP_NAMESZ + 4;
+ bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
+ }
+ if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
+ ret += NFS4_FHSIZE + 4;
+ bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
+ }
+ if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
+ ret += NFS4_MAXLABELLEN + 12;
+ bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
+ }
+ /*
+ * Largest of remaining attributes are 16 bytes (e.g.,
+ * supported_attributes)
+ */
+ ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
+ /* bitmask, length */
+ ret += 20;
+ return ret;
+}
+
+static u32 nfsd4_getfh_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
+}
+
+static u32 nfsd4_link_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_change_info_maxsz)
+ * sizeof(__be32);
+}
+
+static u32 nfsd4_lock_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
+ * sizeof(__be32);
+}
+
+static u32 nfsd4_open_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_stateid_maxsz
+ + op_encode_change_info_maxsz + 1
+ + nfs4_fattr_bitmap_maxsz
+ + op_encode_delegation_maxsz) * sizeof(__be32);
+}
+
+static u32 nfsd4_read_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
+
+ return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
+}
+
+static u32 nfsd4_read_plus_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
+ /*
+ * If we detect that the file changed during hole encoding, then we
+ * recover by encoding the remaining reply as data. This means we need
+ * to set aside enough room to encode two data segments.
+ */
+ u32 seg_len = 2 * (1 + 2 + 1);
+
+ return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
+}
+
+static u32 nfsd4_readdir_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ u32 rlen = min(op->u.readdir.rd_maxcount, nfsd4_max_payload(rqstp));
+
+ return (op_encode_hdr_size + op_encode_verifier_maxsz +
+ XDR_QUADLEN(rlen)) * sizeof(__be32);
+}
+
+static u32 nfsd4_readlink_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
+}
+
+static u32 nfsd4_remove_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_change_info_maxsz)
+ * sizeof(__be32);
+}
+
+static u32 nfsd4_rename_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_change_info_maxsz
+ + op_encode_change_info_maxsz) * sizeof(__be32);
+}
+
+static u32 nfsd4_sequence_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size
+ + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
+}
+
+static u32 nfsd4_test_stateid_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
+ * sizeof(__be32);
+}
+
+static u32 nfsd4_setattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
+}
+
+static u32 nfsd4_secinfo_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
+ (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
+}
+
+static u32 nfsd4_setclientid_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
+ sizeof(__be32);
+}
+
+static u32 nfsd4_write_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
+}
+
+static u32 nfsd4_exchange_id_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
+ 1 + 1 + /* eir_flags, spr_how */\
+ 4 + /* spo_must_enforce & _allow with bitmap */\
+ 2 + /*eir_server_owner.so_minor_id */\
+ /* eir_server_owner.so_major_id<> */\
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
+ /* eir_server_scope<> */\
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
+ 1 + /* eir_server_impl_id array length */\
+ 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
+}
+
+static u32 nfsd4_bind_conn_to_session_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + \
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
+ 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
+}
+
+static u32 nfsd4_create_session_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + \
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
+ 2 + /* csr_sequence, csr_flags */\
+ op_encode_channel_attrs_maxsz + \
+ op_encode_channel_attrs_maxsz) * sizeof(__be32);
+}
+
+static u32 nfsd4_copy_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* wr_callback */ +
+ op_encode_stateid_maxsz /* wr_callback */ +
+ 2 /* wr_count */ +
+ 1 /* wr_committed */ +
+ op_encode_verifier_maxsz +
+ 1 /* cr_consecutive */ +
+ 1 /* cr_synchronous */) * sizeof(__be32);
+}
+
+static u32 nfsd4_offload_status_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 2 /* osr_count */ +
+ 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
+}
+
+static u32 nfsd4_copy_notify_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 3 /* cnr_lease_time */ +
+ 1 /* We support one cnr_source_server */ +
+ 1 /* cnr_stateid seq */ +
+ op_encode_stateid_maxsz /* cnr_stateid */ +
+ 1 /* num cnr_source_server*/ +
+ 1 /* nl4_type */ +
+ 1 /* nl4 size */ +
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
+ * sizeof(__be32);
+}
+
+#ifdef CONFIG_NFSD_PNFS
+static u32 nfsd4_getdeviceinfo_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ u32 rlen = min(op->u.getdeviceinfo.gd_maxcount, nfsd4_max_payload(rqstp));
+
+ return (op_encode_hdr_size +
+ 1 /* gd_layout_type*/ +
+ XDR_QUADLEN(rlen) +
+ 2 /* gd_notify_types */) * sizeof(__be32);
+}
+
+/*
+ * At this stage we don't really know what layout driver will handle the request,
+ * so we need to define an arbitrary upper bound here.
+ */
+#define MAX_LAYOUT_SIZE 128
+static u32 nfsd4_layoutget_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* logr_return_on_close */ +
+ op_encode_stateid_maxsz +
+ 1 /* nr of layouts */ +
+ MAX_LAYOUT_SIZE) * sizeof(__be32);
+}
+
+static u32 nfsd4_layoutcommit_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* locr_newsize */ +
+ 2 /* ns_size */) * sizeof(__be32);
+}
+
+static u32 nfsd4_layoutreturn_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size +
+ 1 /* lrs_stateid */ +
+ op_encode_stateid_maxsz) * sizeof(__be32);
+}
+#endif /* CONFIG_NFSD_PNFS */
+
+
+static u32 nfsd4_seek_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + 3) * sizeof(__be32);
+}
+
+static u32 nfsd4_getxattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ u32 rlen = min_t(u32, XATTR_SIZE_MAX, nfsd4_max_payload(rqstp));
+
+ return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
+}
+
+static u32 nfsd4_setxattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_change_info_maxsz)
+ * sizeof(__be32);
+}
+static u32 nfsd4_listxattrs_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ u32 rlen = min(op->u.listxattrs.lsxa_maxcount, nfsd4_max_payload(rqstp));
+
+ return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
+}
+
+static u32 nfsd4_removexattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
+{
+ return (op_encode_hdr_size + op_encode_change_info_maxsz)
+ * sizeof(__be32);
+}
+
+
+static const struct nfsd4_operation nfsd4_ops[] = {
+ [OP_ACCESS] = {
+ .op_func = nfsd4_access,
+ .op_name = "OP_ACCESS",
+ .op_rsize_bop = nfsd4_access_rsize,
+ },
+ [OP_CLOSE] = {
+ .op_func = nfsd4_close,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_CLOSE",
+ .op_rsize_bop = nfsd4_status_stateid_rsize,
+ .op_get_currentstateid = nfsd4_get_closestateid,
+ .op_set_currentstateid = nfsd4_set_closestateid,
+ },
+ [OP_COMMIT] = {
+ .op_func = nfsd4_commit,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_COMMIT",
+ .op_rsize_bop = nfsd4_commit_rsize,
+ },
+ [OP_CREATE] = {
+ .op_func = nfsd4_create,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
+ .op_name = "OP_CREATE",
+ .op_rsize_bop = nfsd4_create_rsize,
+ },
+ [OP_DELEGRETURN] = {
+ .op_func = nfsd4_delegreturn,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_DELEGRETURN",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ .op_get_currentstateid = nfsd4_get_delegreturnstateid,
+ },
+ [OP_GETATTR] = {
+ .op_func = nfsd4_getattr,
+ .op_flags = ALLOWED_ON_ABSENT_FS,
+ .op_rsize_bop = nfsd4_getattr_rsize,
+ .op_name = "OP_GETATTR",
+ },
+ [OP_GETFH] = {
+ .op_func = nfsd4_getfh,
+ .op_name = "OP_GETFH",
+ .op_rsize_bop = nfsd4_getfh_rsize,
+ },
+ [OP_LINK] = {
+ .op_func = nfsd4_link,
+ .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
+ | OP_CACHEME,
+ .op_name = "OP_LINK",
+ .op_rsize_bop = nfsd4_link_rsize,
+ },
+ [OP_LOCK] = {
+ .op_func = nfsd4_lock,
+ .op_flags = OP_MODIFIES_SOMETHING |
+ OP_NONTRIVIAL_ERROR_ENCODE,
+ .op_name = "OP_LOCK",
+ .op_rsize_bop = nfsd4_lock_rsize,
+ .op_set_currentstateid = nfsd4_set_lockstateid,
+ },
+ [OP_LOCKT] = {
+ .op_func = nfsd4_lockt,
+ .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
+ .op_name = "OP_LOCKT",
+ .op_rsize_bop = nfsd4_lock_rsize,
+ },
+ [OP_LOCKU] = {
+ .op_func = nfsd4_locku,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LOCKU",
+ .op_rsize_bop = nfsd4_status_stateid_rsize,
+ .op_get_currentstateid = nfsd4_get_lockustateid,
+ },
+ [OP_LOOKUP] = {
+ .op_func = nfsd4_lookup,
+ .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
+ .op_name = "OP_LOOKUP",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_LOOKUPP] = {
+ .op_func = nfsd4_lookupp,
+ .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
+ .op_name = "OP_LOOKUPP",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_NVERIFY] = {
+ .op_func = nfsd4_nverify,
+ .op_name = "OP_NVERIFY",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_OPEN] = {
+ .op_func = nfsd4_open,
+ .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_OPEN",
+ .op_rsize_bop = nfsd4_open_rsize,
+ .op_set_currentstateid = nfsd4_set_openstateid,
+ },
+ [OP_OPEN_CONFIRM] = {
+ .op_func = nfsd4_open_confirm,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_OPEN_CONFIRM",
+ .op_rsize_bop = nfsd4_status_stateid_rsize,
+ },
+ [OP_OPEN_DOWNGRADE] = {
+ .op_func = nfsd4_open_downgrade,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_OPEN_DOWNGRADE",
+ .op_rsize_bop = nfsd4_status_stateid_rsize,
+ .op_get_currentstateid = nfsd4_get_opendowngradestateid,
+ .op_set_currentstateid = nfsd4_set_opendowngradestateid,
+ },
+ [OP_PUTFH] = {
+ .op_func = nfsd4_putfh,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
+ | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
+ .op_name = "OP_PUTFH",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_PUTPUBFH] = {
+ .op_func = nfsd4_putrootfh,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
+ | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
+ .op_name = "OP_PUTPUBFH",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_PUTROOTFH] = {
+ .op_func = nfsd4_putrootfh,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
+ | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
+ .op_name = "OP_PUTROOTFH",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_READ] = {
+ .op_func = nfsd4_read,
+ .op_release = nfsd4_read_release,
+ .op_name = "OP_READ",
+ .op_rsize_bop = nfsd4_read_rsize,
+ .op_get_currentstateid = nfsd4_get_readstateid,
+ },
+ [OP_READDIR] = {
+ .op_func = nfsd4_readdir,
+ .op_name = "OP_READDIR",
+ .op_rsize_bop = nfsd4_readdir_rsize,
+ },
+ [OP_READLINK] = {
+ .op_func = nfsd4_readlink,
+ .op_name = "OP_READLINK",
+ .op_rsize_bop = nfsd4_readlink_rsize,
+ },
+ [OP_REMOVE] = {
+ .op_func = nfsd4_remove,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
+ .op_name = "OP_REMOVE",
+ .op_rsize_bop = nfsd4_remove_rsize,
+ },
+ [OP_RENAME] = {
+ .op_func = nfsd4_rename,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
+ .op_name = "OP_RENAME",
+ .op_rsize_bop = nfsd4_rename_rsize,
+ },
+ [OP_RENEW] = {
+ .op_func = nfsd4_renew,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
+ | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_RENEW",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+
+ },
+ [OP_RESTOREFH] = {
+ .op_func = nfsd4_restorefh,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
+ | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_RESTOREFH",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_SAVEFH] = {
+ .op_func = nfsd4_savefh,
+ .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_SAVEFH",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_SECINFO] = {
+ .op_func = nfsd4_secinfo,
+ .op_release = nfsd4_secinfo_release,
+ .op_flags = OP_HANDLES_WRONGSEC,
+ .op_name = "OP_SECINFO",
+ .op_rsize_bop = nfsd4_secinfo_rsize,
+ },
+ [OP_SETATTR] = {
+ .op_func = nfsd4_setattr,
+ .op_name = "OP_SETATTR",
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
+ | OP_NONTRIVIAL_ERROR_ENCODE,
+ .op_rsize_bop = nfsd4_setattr_rsize,
+ .op_get_currentstateid = nfsd4_get_setattrstateid,
+ },
+ [OP_SETCLIENTID] = {
+ .op_func = nfsd4_setclientid,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
+ | OP_MODIFIES_SOMETHING | OP_CACHEME
+ | OP_NONTRIVIAL_ERROR_ENCODE,
+ .op_name = "OP_SETCLIENTID",
+ .op_rsize_bop = nfsd4_setclientid_rsize,
+ },
+ [OP_SETCLIENTID_CONFIRM] = {
+ .op_func = nfsd4_setclientid_confirm,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
+ | OP_MODIFIES_SOMETHING | OP_CACHEME,
+ .op_name = "OP_SETCLIENTID_CONFIRM",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_VERIFY] = {
+ .op_func = nfsd4_verify,
+ .op_name = "OP_VERIFY",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_WRITE] = {
+ .op_func = nfsd4_write,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
+ .op_name = "OP_WRITE",
+ .op_rsize_bop = nfsd4_write_rsize,
+ .op_get_currentstateid = nfsd4_get_writestateid,
+ },
+ [OP_RELEASE_LOCKOWNER] = {
+ .op_func = nfsd4_release_lockowner,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
+ | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_RELEASE_LOCKOWNER",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+
+ /* NFSv4.1 operations */
+ [OP_EXCHANGE_ID] = {
+ .op_func = nfsd4_exchange_id,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
+ | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_EXCHANGE_ID",
+ .op_rsize_bop = nfsd4_exchange_id_rsize,
+ },
+ [OP_BACKCHANNEL_CTL] = {
+ .op_func = nfsd4_backchannel_ctl,
+ .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_BACKCHANNEL_CTL",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_BIND_CONN_TO_SESSION] = {
+ .op_func = nfsd4_bind_conn_to_session,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
+ | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_BIND_CONN_TO_SESSION",
+ .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
+ },
+ [OP_CREATE_SESSION] = {
+ .op_func = nfsd4_create_session,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
+ | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_CREATE_SESSION",
+ .op_rsize_bop = nfsd4_create_session_rsize,
+ },
+ [OP_DESTROY_SESSION] = {
+ .op_func = nfsd4_destroy_session,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
+ | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_DESTROY_SESSION",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_SEQUENCE] = {
+ .op_func = nfsd4_sequence,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
+ .op_name = "OP_SEQUENCE",
+ .op_rsize_bop = nfsd4_sequence_rsize,
+ },
+ [OP_DESTROY_CLIENTID] = {
+ .op_func = nfsd4_destroy_clientid,
+ .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
+ | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_DESTROY_CLIENTID",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_RECLAIM_COMPLETE] = {
+ .op_func = nfsd4_reclaim_complete,
+ .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_RECLAIM_COMPLETE",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_SECINFO_NO_NAME] = {
+ .op_func = nfsd4_secinfo_no_name,
+ .op_release = nfsd4_secinfo_no_name_release,
+ .op_flags = OP_HANDLES_WRONGSEC,
+ .op_name = "OP_SECINFO_NO_NAME",
+ .op_rsize_bop = nfsd4_secinfo_rsize,
+ },
+ [OP_TEST_STATEID] = {
+ .op_func = nfsd4_test_stateid,
+ .op_flags = ALLOWED_WITHOUT_FH,
+ .op_name = "OP_TEST_STATEID",
+ .op_rsize_bop = nfsd4_test_stateid_rsize,
+ },
+ [OP_FREE_STATEID] = {
+ .op_func = nfsd4_free_stateid,
+ .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_FREE_STATEID",
+ .op_get_currentstateid = nfsd4_get_freestateid,
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+#ifdef CONFIG_NFSD_PNFS
+ [OP_GETDEVICEINFO] = {
+ .op_func = nfsd4_getdeviceinfo,
+ .op_release = nfsd4_getdeviceinfo_release,
+ .op_flags = ALLOWED_WITHOUT_FH,
+ .op_name = "OP_GETDEVICEINFO",
+ .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
+ },
+ [OP_LAYOUTGET] = {
+ .op_func = nfsd4_layoutget,
+ .op_release = nfsd4_layoutget_release,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LAYOUTGET",
+ .op_rsize_bop = nfsd4_layoutget_rsize,
+ },
+ [OP_LAYOUTCOMMIT] = {
+ .op_func = nfsd4_layoutcommit,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LAYOUTCOMMIT",
+ .op_rsize_bop = nfsd4_layoutcommit_rsize,
+ },
+ [OP_LAYOUTRETURN] = {
+ .op_func = nfsd4_layoutreturn,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_LAYOUTRETURN",
+ .op_rsize_bop = nfsd4_layoutreturn_rsize,
+ },
+#endif /* CONFIG_NFSD_PNFS */
+
+ /* NFSv4.2 operations */
+ [OP_ALLOCATE] = {
+ .op_func = nfsd4_allocate,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_ALLOCATE",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_DEALLOCATE] = {
+ .op_func = nfsd4_deallocate,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_DEALLOCATE",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_CLONE] = {
+ .op_func = nfsd4_clone,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_CLONE",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_COPY] = {
+ .op_func = nfsd4_copy,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_COPY",
+ .op_rsize_bop = nfsd4_copy_rsize,
+ },
+ [OP_READ_PLUS] = {
+ .op_func = nfsd4_read,
+ .op_release = nfsd4_read_release,
+ .op_name = "OP_READ_PLUS",
+ .op_rsize_bop = nfsd4_read_plus_rsize,
+ .op_get_currentstateid = nfsd4_get_readstateid,
+ },
+ [OP_SEEK] = {
+ .op_func = nfsd4_seek,
+ .op_name = "OP_SEEK",
+ .op_rsize_bop = nfsd4_seek_rsize,
+ },
+ [OP_OFFLOAD_STATUS] = {
+ .op_func = nfsd4_offload_status,
+ .op_name = "OP_OFFLOAD_STATUS",
+ .op_rsize_bop = nfsd4_offload_status_rsize,
+ },
+ [OP_OFFLOAD_CANCEL] = {
+ .op_func = nfsd4_offload_cancel,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_OFFLOAD_CANCEL",
+ .op_rsize_bop = nfsd4_only_status_rsize,
+ },
+ [OP_COPY_NOTIFY] = {
+ .op_func = nfsd4_copy_notify,
+ .op_flags = OP_MODIFIES_SOMETHING,
+ .op_name = "OP_COPY_NOTIFY",
+ .op_rsize_bop = nfsd4_copy_notify_rsize,
+ },
+ [OP_GETXATTR] = {
+ .op_func = nfsd4_getxattr,
+ .op_name = "OP_GETXATTR",
+ .op_rsize_bop = nfsd4_getxattr_rsize,
+ },
+ [OP_SETXATTR] = {
+ .op_func = nfsd4_setxattr,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
+ .op_name = "OP_SETXATTR",
+ .op_rsize_bop = nfsd4_setxattr_rsize,
+ },
+ [OP_LISTXATTRS] = {
+ .op_func = nfsd4_listxattrs,
+ .op_name = "OP_LISTXATTRS",
+ .op_rsize_bop = nfsd4_listxattrs_rsize,
+ },
+ [OP_REMOVEXATTR] = {
+ .op_func = nfsd4_removexattr,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
+ .op_name = "OP_REMOVEXATTR",
+ .op_rsize_bop = nfsd4_removexattr_rsize,
+ },
+};
+
+/**
+ * nfsd4_spo_must_allow - Determine if the compound op contains an
+ * operation that is allowed to be sent with machine credentials
+ *
+ * @rqstp: a pointer to the struct svc_rqst
+ *
+ * Checks to see if the compound contains a spo_must_allow op
+ * and confirms that it was sent with the proper machine creds.
+ */
+
+bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
+{
+ struct nfsd4_compoundres *resp = rqstp->rq_resp;
+ struct nfsd4_compoundargs *argp = rqstp->rq_argp;
+ struct nfsd4_op *this;
+ struct nfsd4_compound_state *cstate = &resp->cstate;
+ struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
+ u32 opiter;
+
+ if (!cstate->minorversion)
+ return false;
+
+ if (cstate->spo_must_allowed)
+ return true;
+
+ opiter = resp->opcnt;
+ while (opiter < argp->opcnt) {
+ this = &argp->ops[opiter++];
+ if (test_bit(this->opnum, allow->u.longs) &&
+ cstate->clp->cl_mach_cred &&
+ nfsd4_mach_creds_match(cstate->clp, rqstp)) {
+ cstate->spo_must_allowed = true;
+ return true;
+ }
+ }
+ cstate->spo_must_allowed = false;
+ return false;
+}
+
+int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
+{
+ if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
+ return op_encode_hdr_size * sizeof(__be32);
+
+ BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
+ return OPDESC(op)->op_rsize_bop(rqstp, op);
+}
+
+void warn_on_nonidempotent_op(struct nfsd4_op *op)
+{
+ if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
+ pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
+ op->opnum, nfsd4_op_name(op->opnum));
+ WARN_ON_ONCE(1);
+ }
+}
+
+static const char *nfsd4_op_name(unsigned opnum)
+{
+ if (opnum < ARRAY_SIZE(nfsd4_ops))
+ return nfsd4_ops[opnum].op_name;
+ return "unknown_operation";
+}
+
+static const struct svc_procedure nfsd_procedures4[2] = {
+ [NFSPROC4_NULL] = {
+ .pc_func = nfsd4_proc_null,
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_argzero = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = 1,
+ .pc_name = "NULL",
+ },
+ [NFSPROC4_COMPOUND] = {
+ .pc_func = nfsd4_proc_compound,
+ .pc_decode = nfs4svc_decode_compoundargs,
+ .pc_encode = nfs4svc_encode_compoundres,
+ .pc_argsize = sizeof(struct nfsd4_compoundargs),
+ .pc_argzero = offsetof(struct nfsd4_compoundargs, iops),
+ .pc_ressize = sizeof(struct nfsd4_compoundres),
+ .pc_release = nfsd4_release_compoundargs,
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = NFSD_BUFSIZE/4,
+ .pc_name = "COMPOUND",
+ },
+};
+
+static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
+const struct svc_version nfsd_version4 = {
+ .vs_vers = 4,
+ .vs_nproc = 2,
+ .vs_proc = nfsd_procedures4,
+ .vs_count = nfsd_count3,
+ .vs_dispatch = nfsd_dispatch,
+ .vs_xdrsize = NFS4_SVC_XDRSIZE,
+ .vs_rpcb_optnl = true,
+ .vs_need_cong_ctrl = true,
+};