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Diffstat (limited to 'fs/nfsd/nfs4proc.c')
-rw-r--r--fs/nfsd/nfs4proc.c984
1 files changed, 984 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
new file mode 100644
index 00000000000..e8158741e8b
--- /dev/null
+++ b/fs/nfsd/nfs4proc.c
@@ -0,0 +1,984 @@
+/*
+ * fs/nfsd/nfs4proc.c
+ *
+ * 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.
+ *
+ * Note: some routines in this file are just trivial wrappers
+ * (e.g. nfsd4_lookup()) defined solely for the sake of consistent
+ * naming. Since all such routines have been declared "inline",
+ * there shouldn't be any associated overhead. At some point in
+ * the future, I might inline these "by hand" to clean up a
+ * little.
+ */
+
+#include <linux/param.h>
+#include <linux/major.h>
+#include <linux/slab.h>
+
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/cache.h>
+#include <linux/nfs4.h>
+#include <linux/nfsd/state.h>
+#include <linux/nfsd/xdr4.h>
+#include <linux/nfs4_acl.h>
+
+#define NFSDDBG_FACILITY NFSDDBG_PROC
+
+static inline void
+fh_dup2(struct svc_fh *dst, struct svc_fh *src)
+{
+ fh_put(dst);
+ dget(src->fh_dentry);
+ if (src->fh_export)
+ cache_get(&src->fh_export->h);
+ *dst = *src;
+}
+
+static int
+do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+ int accmode, status;
+
+ if (open->op_truncate &&
+ !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
+ return nfserr_inval;
+
+ accmode = MAY_NOP;
+ if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
+ accmode = MAY_READ;
+ if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE)
+ accmode |= (MAY_WRITE | MAY_TRUNC);
+ accmode |= MAY_OWNER_OVERRIDE;
+
+ status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
+
+ return status;
+}
+
+static int
+do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+ struct svc_fh resfh;
+ int status;
+
+ fh_init(&resfh, NFS4_FHSIZE);
+ open->op_truncate = 0;
+
+ if (open->op_create) {
+ /*
+ * Note: create modes (UNCHECKED,GUARDED...) are the same
+ * in NFSv4 as in v3.
+ */
+ status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
+ open->op_fname.len, &open->op_iattr,
+ &resfh, open->op_createmode,
+ (u32 *)open->op_verf.data, &open->op_truncate);
+ }
+ else {
+ status = nfsd_lookup(rqstp, current_fh,
+ open->op_fname.data, open->op_fname.len, &resfh);
+ fh_unlock(current_fh);
+ }
+
+ if (!status) {
+ set_change_info(&open->op_cinfo, current_fh);
+
+ /* set reply cache */
+ fh_dup2(current_fh, &resfh);
+ open->op_stateowner->so_replay.rp_openfh_len =
+ resfh.fh_handle.fh_size;
+ memcpy(open->op_stateowner->so_replay.rp_openfh,
+ &resfh.fh_handle.fh_base,
+ resfh.fh_handle.fh_size);
+
+ status = do_open_permission(rqstp, current_fh, open);
+ }
+
+ fh_put(&resfh);
+ return status;
+}
+
+static int
+do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+ int status;
+
+ /* Only reclaims from previously confirmed clients are valid */
+ if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
+ return status;
+
+ /* 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));
+
+ /* set replay cache */
+ open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
+ memcpy(open->op_stateowner->so_replay.rp_openfh,
+ &current_fh->fh_handle.fh_base,
+ current_fh->fh_handle.fh_size);
+
+ open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
+ (open->op_iattr.ia_size == 0);
+
+ status = do_open_permission(rqstp, current_fh, open);
+
+ return status;
+}
+
+
+static inline int
+nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+ int status;
+ dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
+ (int)open->op_fname.len, open->op_fname.data,
+ open->op_stateowner);
+
+ if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
+ return nfserr_grace;
+
+ if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
+ return nfserr_no_grace;
+
+ /* This check required by spec. */
+ if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
+ return nfserr_inval;
+
+ nfs4_lock_state();
+
+ /* check seqid for replay. set nfs4_owner */
+ status = nfsd4_process_open1(open);
+ if (status == NFSERR_REPLAY_ME) {
+ struct nfs4_replay *rp = &open->op_stateowner->so_replay;
+ fh_put(current_fh);
+ current_fh->fh_handle.fh_size = rp->rp_openfh_len;
+ memcpy(&current_fh->fh_handle.fh_base, rp->rp_openfh,
+ rp->rp_openfh_len);
+ status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
+ if (status)
+ dprintk("nfsd4_open: replay failed"
+ " restoring previous filehandle\n");
+ else
+ status = NFSERR_REPLAY_ME;
+ }
+ if (status)
+ goto out;
+ switch (open->op_claim_type) {
+ case NFS4_OPEN_CLAIM_NULL:
+ /*
+ * (1) set CURRENT_FH to the file being opened,
+ * creating it if necessary, (2) set open->op_cinfo,
+ * (3) set open->op_truncate if the file is to be
+ * truncated after opening, (4) do permission checking.
+ */
+ status = do_open_lookup(rqstp, current_fh, open);
+ if (status)
+ goto out;
+ break;
+ case NFS4_OPEN_CLAIM_PREVIOUS:
+ /*
+ * The CURRENT_FH is already set to the file being
+ * opened. (1) set open->op_cinfo, (2) set
+ * open->op_truncate if the file is to be truncated
+ * after opening, (3) do permission checking.
+ */
+ status = do_open_fhandle(rqstp, current_fh, open);
+ if (status)
+ goto out;
+ break;
+ case NFS4_OPEN_CLAIM_DELEGATE_CUR:
+ case NFS4_OPEN_CLAIM_DELEGATE_PREV:
+ printk("NFSD: unsupported OPEN claim type %d\n",
+ open->op_claim_type);
+ status = nfserr_notsupp;
+ goto out;
+ default:
+ printk("NFSD: Invalid OPEN claim type %d\n",
+ open->op_claim_type);
+ status = nfserr_inval;
+ goto out;
+ }
+ /*
+ * nfsd4_process_open2() does the actual opening of the file. If
+ * successful, it (1) truncates the file if open->op_truncate was
+ * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
+ */
+ status = nfsd4_process_open2(rqstp, current_fh, open);
+out:
+ if (open->op_stateowner)
+ nfs4_get_stateowner(open->op_stateowner);
+ nfs4_unlock_state();
+ return status;
+}
+
+/*
+ * filehandle-manipulating ops.
+ */
+static inline int
+nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh)
+{
+ if (!current_fh->fh_dentry)
+ return nfserr_nofilehandle;
+
+ *getfh = current_fh;
+ return nfs_ok;
+}
+
+static inline int
+nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh)
+{
+ fh_put(current_fh);
+ current_fh->fh_handle.fh_size = putfh->pf_fhlen;
+ memcpy(&current_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen);
+ return fh_verify(rqstp, current_fh, 0, MAY_NOP);
+}
+
+static inline int
+nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh)
+{
+ int status;
+
+ fh_put(current_fh);
+ status = exp_pseudoroot(rqstp->rq_client, current_fh,
+ &rqstp->rq_chandle);
+ if (!status)
+ status = nfserrno(nfsd_setuser(rqstp, current_fh->fh_export));
+ return status;
+}
+
+static inline int
+nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
+{
+ if (!save_fh->fh_dentry)
+ return nfserr_restorefh;
+
+ fh_dup2(current_fh, save_fh);
+ return nfs_ok;
+}
+
+static inline int
+nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
+{
+ if (!current_fh->fh_dentry)
+ return nfserr_nofilehandle;
+
+ fh_dup2(save_fh, current_fh);
+ return nfs_ok;
+}
+
+/*
+ * misc nfsv4 ops
+ */
+static inline int
+nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access)
+{
+ if (access->ac_req_access & ~NFS3_ACCESS_FULL)
+ return nfserr_inval;
+
+ access->ac_resp_access = access->ac_req_access;
+ return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported);
+}
+
+static inline int
+nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit)
+{
+ int status;
+
+ u32 *p = (u32 *)commit->co_verf.data;
+ *p++ = nfssvc_boot.tv_sec;
+ *p++ = nfssvc_boot.tv_usec;
+
+ status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count);
+ if (status == nfserr_symlink)
+ status = nfserr_inval;
+ return status;
+}
+
+static int
+nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create)
+{
+ struct svc_fh resfh;
+ int status;
+ dev_t rdev;
+
+ fh_init(&resfh, NFS4_FHSIZE);
+
+ status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE);
+ if (status == nfserr_symlink)
+ status = nfserr_notdir;
+ if (status)
+ return status;
+
+ switch (create->cr_type) {
+ case NF4LNK:
+ /* ugh! we have to null-terminate the linktext, or
+ * vfs_symlink() will choke. it is always safe to
+ * null-terminate by brute force, since at worst we
+ * will overwrite the first byte of the create namelen
+ * in the XDR buffer, which has already been extracted
+ * during XDR decode.
+ */
+ create->cr_linkname[create->cr_linklen] = 0;
+
+ status = nfsd_symlink(rqstp, current_fh, create->cr_name,
+ create->cr_namelen, create->cr_linkname,
+ create->cr_linklen, &resfh, &create->cr_iattr);
+ break;
+
+ case NF4BLK:
+ rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
+ if (MAJOR(rdev) != create->cr_specdata1 ||
+ MINOR(rdev) != create->cr_specdata2)
+ return nfserr_inval;
+ status = nfsd_create(rqstp, current_fh, create->cr_name,
+ create->cr_namelen, &create->cr_iattr,
+ S_IFBLK, rdev, &resfh);
+ break;
+
+ case NF4CHR:
+ rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
+ if (MAJOR(rdev) != create->cr_specdata1 ||
+ MINOR(rdev) != create->cr_specdata2)
+ return nfserr_inval;
+ status = nfsd_create(rqstp, current_fh, create->cr_name,
+ create->cr_namelen, &create->cr_iattr,
+ S_IFCHR, rdev, &resfh);
+ break;
+
+ case NF4SOCK:
+ status = nfsd_create(rqstp, current_fh, create->cr_name,
+ create->cr_namelen, &create->cr_iattr,
+ S_IFSOCK, 0, &resfh);
+ break;
+
+ case NF4FIFO:
+ status = nfsd_create(rqstp, current_fh, create->cr_name,
+ create->cr_namelen, &create->cr_iattr,
+ S_IFIFO, 0, &resfh);
+ break;
+
+ case NF4DIR:
+ create->cr_iattr.ia_valid &= ~ATTR_SIZE;
+ status = nfsd_create(rqstp, current_fh, create->cr_name,
+ create->cr_namelen, &create->cr_iattr,
+ S_IFDIR, 0, &resfh);
+ break;
+
+ default:
+ status = nfserr_badtype;
+ }
+
+ if (!status) {
+ fh_unlock(current_fh);
+ set_change_info(&create->cr_cinfo, current_fh);
+ fh_dup2(current_fh, &resfh);
+ }
+
+ fh_put(&resfh);
+ return status;
+}
+
+static inline int
+nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr)
+{
+ int status;
+
+ status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
+ if (status)
+ return status;
+
+ if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
+ return nfserr_inval;
+
+ getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
+ getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
+
+ getattr->ga_fhp = current_fh;
+ return nfs_ok;
+}
+
+static inline int
+nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh,
+ struct svc_fh *save_fh, struct nfsd4_link *link)
+{
+ int status = nfserr_nofilehandle;
+
+ if (!save_fh->fh_dentry)
+ return status;
+ status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh);
+ if (!status)
+ set_change_info(&link->li_cinfo, current_fh);
+ return status;
+}
+
+static int
+nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh)
+{
+ struct svc_fh tmp_fh;
+ int ret;
+
+ fh_init(&tmp_fh, NFS4_FHSIZE);
+ if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
+ &rqstp->rq_chandle)) != 0)
+ return ret;
+ if (tmp_fh.fh_dentry == current_fh->fh_dentry) {
+ fh_put(&tmp_fh);
+ return nfserr_noent;
+ }
+ fh_put(&tmp_fh);
+ return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh);
+}
+
+static inline int
+nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup)
+{
+ return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh);
+}
+
+static inline int
+nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read)
+{
+ int status;
+ struct file *filp = NULL;
+
+ /* no need to check permission - this will be done in nfsd_read() */
+
+ if (read->rd_offset >= OFFSET_MAX)
+ return nfserr_inval;
+
+ nfs4_lock_state();
+ /* check stateid */
+ if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid,
+ CHECK_FH | RD_STATE, &filp))) {
+ dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
+ goto out;
+ }
+ status = nfs_ok;
+out:
+ nfs4_unlock_state();
+ read->rd_rqstp = rqstp;
+ read->rd_fhp = current_fh;
+ read->rd_filp = filp;
+ return status;
+}
+
+static inline int
+nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *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_SUPPORTED_ATTRS_WORD0;
+ readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
+
+ if ((cookie > ~(u32)0) || (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 = current_fh;
+ return nfs_ok;
+}
+
+static inline int
+nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink)
+{
+ readlink->rl_rqstp = rqstp;
+ readlink->rl_fhp = current_fh;
+ return nfs_ok;
+}
+
+static inline int
+nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove)
+{
+ int status;
+
+ status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen);
+ if (status == nfserr_symlink)
+ return nfserr_notdir;
+ if (!status) {
+ fh_unlock(current_fh);
+ set_change_info(&remove->rm_cinfo, current_fh);
+ }
+ return status;
+}
+
+static inline int
+nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh,
+ struct svc_fh *save_fh, struct nfsd4_rename *rename)
+{
+ int status = nfserr_nofilehandle;
+
+ if (!save_fh->fh_dentry)
+ return status;
+ status = nfsd_rename(rqstp, save_fh, rename->rn_sname,
+ rename->rn_snamelen, current_fh,
+ rename->rn_tname, rename->rn_tnamelen);
+
+ /* the underlying filesystem returns different error's than required
+ * by NFSv4. both save_fh and current_fh have been verified.. */
+ if (status == nfserr_isdir)
+ status = nfserr_exist;
+ else if ((status == nfserr_notdir) &&
+ (S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) &&
+ S_ISDIR(current_fh->fh_dentry->d_inode->i_mode)))
+ status = nfserr_exist;
+ else if (status == nfserr_symlink)
+ status = nfserr_notdir;
+
+ if (!status) {
+ set_change_info(&rename->rn_sinfo, current_fh);
+ set_change_info(&rename->rn_tinfo, save_fh);
+ }
+ return status;
+}
+
+static inline int
+nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr)
+{
+ int status = nfs_ok;
+
+ if (!current_fh->fh_dentry)
+ return nfserr_nofilehandle;
+
+ status = nfs_ok;
+ if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
+ nfs4_lock_state();
+ if ((status = nfs4_preprocess_stateid_op(current_fh,
+ &setattr->sa_stateid,
+ CHECK_FH | WR_STATE, NULL))) {
+ dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
+ goto out_unlock;
+ }
+ nfs4_unlock_state();
+ }
+ status = nfs_ok;
+ if (setattr->sa_acl != NULL)
+ status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl);
+ if (status)
+ goto out;
+ status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr,
+ 0, (time_t)0);
+out:
+ return status;
+out_unlock:
+ nfs4_unlock_state();
+ return status;
+}
+
+static inline int
+nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write)
+{
+ stateid_t *stateid = &write->wr_stateid;
+ struct file *filp = NULL;
+ u32 *p;
+ int status = nfs_ok;
+
+ /* no need to check permission - this will be done in nfsd_write() */
+
+ if (write->wr_offset >= OFFSET_MAX)
+ return nfserr_inval;
+
+ nfs4_lock_state();
+ if ((status = nfs4_preprocess_stateid_op(current_fh, stateid,
+ CHECK_FH | WR_STATE, &filp))) {
+ dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
+ goto out;
+ }
+ nfs4_unlock_state();
+
+ write->wr_bytes_written = write->wr_buflen;
+ write->wr_how_written = write->wr_stable_how;
+ p = (u32 *)write->wr_verifier.data;
+ *p++ = nfssvc_boot.tv_sec;
+ *p++ = nfssvc_boot.tv_usec;
+
+ status = nfsd_write(rqstp, current_fh, filp, write->wr_offset,
+ write->wr_vec, write->wr_vlen, write->wr_buflen,
+ &write->wr_how_written);
+
+ if (status == nfserr_symlink)
+ status = nfserr_inval;
+ return status;
+out:
+ nfs4_unlock_state();
+ 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 int
+nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify)
+{
+ u32 *buf, *p;
+ int count;
+ int status;
+
+ status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
+ if (status)
+ return status;
+
+ if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
+ || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
+ return nfserr_attrnotsupp;
+ 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_resource;
+
+ status = nfsd4_encode_fattr(current_fh, current_fh->fh_export,
+ current_fh->fh_dentry, buf,
+ &count, verify->ve_bmval,
+ rqstp);
+
+ /* this means that nfsd4_encode_fattr() ran out of space */
+ if (status == nfserr_resource && count == 0)
+ status = nfserr_not_same;
+ if (status)
+ goto out_kfree;
+
+ p = buf + 3;
+ 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;
+}
+
+/*
+ * NULL call.
+ */
+static int
+nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
+{
+ return nfs_ok;
+}
+
+
+/*
+ * COMPOUND call.
+ */
+static int
+nfsd4_proc_compound(struct svc_rqst *rqstp,
+ struct nfsd4_compoundargs *args,
+ struct nfsd4_compoundres *resp)
+{
+ struct nfsd4_op *op;
+ struct svc_fh *current_fh = NULL;
+ struct svc_fh *save_fh = NULL;
+ struct nfs4_stateowner *replay_owner = NULL;
+ int slack_space; /* in words, not bytes! */
+ int status;
+
+ status = nfserr_resource;
+ current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL);
+ if (current_fh == NULL)
+ goto out;
+ fh_init(current_fh, NFS4_FHSIZE);
+ save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL);
+ if (save_fh == NULL)
+ goto out;
+ fh_init(save_fh, NFS4_FHSIZE);
+
+ resp->xbuf = &rqstp->rq_res;
+ resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
+ resp->tagp = resp->p;
+ /* reserve space for: taglen, tag, and opcnt */
+ resp->p += 2 + XDR_QUADLEN(args->taglen);
+ resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
+ resp->taglen = args->taglen;
+ resp->tag = args->tag;
+ resp->opcnt = 0;
+ resp->rqstp = rqstp;
+
+ /*
+ * According to RFC3010, this takes precedence over all other errors.
+ */
+ status = nfserr_minor_vers_mismatch;
+ if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
+ goto out;
+
+ status = nfs_ok;
+ while (!status && resp->opcnt < args->opcnt) {
+ op = &args->ops[resp->opcnt++];
+
+ /*
+ * 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)
+ goto encode_op;
+
+ /* We must be able to encode a successful response to
+ * this operation, with enough room left over to encode a
+ * failed response to the next operation. If we don't
+ * have enough room, fail with ERR_RESOURCE.
+ */
+/* FIXME - is slack_space *really* words, or bytes??? - neilb */
+ slack_space = (char *)resp->end - (char *)resp->p;
+ if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) {
+ BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE);
+ op->status = nfserr_resource;
+ goto encode_op;
+ }
+
+ /* All operations except RENEW, SETCLIENTID, RESTOREFH
+ * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
+ * require a valid current filehandle
+ *
+ * SETATTR NOFILEHANDLE error handled in nfsd4_setattr
+ * due to required returned bitmap argument
+ */
+ if ((!current_fh->fh_dentry) &&
+ !((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) ||
+ (op->opnum == OP_SETCLIENTID) ||
+ (op->opnum == OP_SETCLIENTID_CONFIRM) ||
+ (op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) ||
+ (op->opnum == OP_RELEASE_LOCKOWNER) ||
+ (op->opnum == OP_SETATTR))) {
+ op->status = nfserr_nofilehandle;
+ goto encode_op;
+ }
+ switch (op->opnum) {
+ case OP_ACCESS:
+ op->status = nfsd4_access(rqstp, current_fh, &op->u.access);
+ break;
+ case OP_CLOSE:
+ op->status = nfsd4_close(rqstp, current_fh, &op->u.close);
+ replay_owner = op->u.close.cl_stateowner;
+ break;
+ case OP_COMMIT:
+ op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit);
+ break;
+ case OP_CREATE:
+ op->status = nfsd4_create(rqstp, current_fh, &op->u.create);
+ break;
+ case OP_DELEGRETURN:
+ op->status = nfsd4_delegreturn(rqstp, current_fh, &op->u.delegreturn);
+ break;
+ case OP_GETATTR:
+ op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr);
+ break;
+ case OP_GETFH:
+ op->status = nfsd4_getfh(current_fh, &op->u.getfh);
+ break;
+ case OP_LINK:
+ op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link);
+ break;
+ case OP_LOCK:
+ op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock);
+ replay_owner = op->u.lock.lk_stateowner;
+ break;
+ case OP_LOCKT:
+ op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt);
+ break;
+ case OP_LOCKU:
+ op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku);
+ replay_owner = op->u.locku.lu_stateowner;
+ break;
+ case OP_LOOKUP:
+ op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup);
+ break;
+ case OP_LOOKUPP:
+ op->status = nfsd4_lookupp(rqstp, current_fh);
+ break;
+ case OP_NVERIFY:
+ op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify);
+ if (op->status == nfserr_not_same)
+ op->status = nfs_ok;
+ break;
+ case OP_OPEN:
+ op->status = nfsd4_open(rqstp, current_fh, &op->u.open);
+ replay_owner = op->u.open.op_stateowner;
+ break;
+ case OP_OPEN_CONFIRM:
+ op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm);
+ replay_owner = op->u.open_confirm.oc_stateowner;
+ break;
+ case OP_OPEN_DOWNGRADE:
+ op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade);
+ replay_owner = op->u.open_downgrade.od_stateowner;
+ break;
+ case OP_PUTFH:
+ op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh);
+ break;
+ case OP_PUTROOTFH:
+ op->status = nfsd4_putrootfh(rqstp, current_fh);
+ break;
+ case OP_READ:
+ op->status = nfsd4_read(rqstp, current_fh, &op->u.read);
+ break;
+ case OP_READDIR:
+ op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir);
+ break;
+ case OP_READLINK:
+ op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink);
+ break;
+ case OP_REMOVE:
+ op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove);
+ break;
+ case OP_RENAME:
+ op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename);
+ break;
+ case OP_RENEW:
+ op->status = nfsd4_renew(&op->u.renew);
+ break;
+ case OP_RESTOREFH:
+ op->status = nfsd4_restorefh(current_fh, save_fh);
+ break;
+ case OP_SAVEFH:
+ op->status = nfsd4_savefh(current_fh, save_fh);
+ break;
+ case OP_SETATTR:
+ op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr);
+ break;
+ case OP_SETCLIENTID:
+ op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
+ break;
+ case OP_SETCLIENTID_CONFIRM:
+ op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
+ break;
+ case OP_VERIFY:
+ op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify);
+ if (op->status == nfserr_same)
+ op->status = nfs_ok;
+ break;
+ case OP_WRITE:
+ op->status = nfsd4_write(rqstp, current_fh, &op->u.write);
+ break;
+ case OP_RELEASE_LOCKOWNER:
+ op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
+ break;
+ default:
+ BUG_ON(op->status == nfs_ok);
+ break;
+ }
+
+encode_op:
+ if (op->status == NFSERR_REPLAY_ME) {
+ op->replay = &replay_owner->so_replay;
+ nfsd4_encode_replay(resp, op);
+ status = op->status = op->replay->rp_status;
+ } else {
+ nfsd4_encode_operation(resp, op);
+ status = op->status;
+ }
+ if (replay_owner && (replay_owner != (void *)(-1))) {
+ nfs4_put_stateowner(replay_owner);
+ replay_owner = NULL;
+ }
+ }
+
+out:
+ nfsd4_release_compoundargs(args);
+ if (current_fh)
+ fh_put(current_fh);
+ kfree(current_fh);
+ if (save_fh)
+ fh_put(save_fh);
+ kfree(save_fh);
+ return status;
+}
+
+#define nfs4svc_decode_voidargs NULL
+#define nfs4svc_release_void NULL
+#define nfsd4_voidres nfsd4_voidargs
+#define nfs4svc_release_compound NULL
+struct nfsd4_voidargs { int dummy; };
+
+#define PROC(name, argt, rest, relt, cache, respsize) \
+ { (svc_procfunc) nfsd4_proc_##name, \
+ (kxdrproc_t) nfs4svc_decode_##argt##args, \
+ (kxdrproc_t) nfs4svc_encode_##rest##res, \
+ (kxdrproc_t) nfs4svc_release_##relt, \
+ sizeof(struct nfsd4_##argt##args), \
+ sizeof(struct nfsd4_##rest##res), \
+ 0, \
+ cache, \
+ respsize, \
+ }
+
+/*
+ * TODO: At the present time, the NFSv4 server does not do XID caching
+ * of requests. Implementing XID caching would not be a serious problem,
+ * although it would require a mild change in interfaces since one
+ * doesn't know whether an NFSv4 request is idempotent until after the
+ * XDR decode. However, XID caching totally confuses pynfs (Peter
+ * Astrand's regression testsuite for NFSv4 servers), which reuses
+ * XID's liberally, so I've left it unimplemented until pynfs generates
+ * better XID's.
+ */
+static struct svc_procedure nfsd_procedures4[2] = {
+ PROC(null, void, void, void, RC_NOCACHE, 1),
+ PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE)
+};
+
+struct svc_version nfsd_version4 = {
+ .vs_vers = 4,
+ .vs_nproc = 2,
+ .vs_proc = nfsd_procedures4,
+ .vs_dispatch = nfsd_dispatch,
+ .vs_xdrsize = NFS4_SVC_XDRSIZE,
+};
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */