--- /dev/null
+/*
+ * 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/xdr4.h>
+
+#define NFSDDBG_FACILITY NFSDDBG_PROC
+
+static inline int
+nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close)
+{
+ return nfs_ok;
+}
+
+/* Note: The organization of the OPEN code seems a little strange; it
+ * has been superfluously split into three routines, one of which is named
+ * nfsd4_process_open2() even though there is no nfsd4_process_open1()!
+ * This is because the code has been organized in anticipation of a
+ * subsequent patch which will implement more of the NFSv4 state model.
+ */
+static int
+do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+ struct svc_fh resfh;
+ int accmode, 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_name,
+ open->op_namelen, &open->op_iattr,
+ &resfh, open->op_createmode,
+ (u32 *)open->op_verf, &open->op_truncate);
+ }
+ else {
+ status = nfsd_lookup(rqstp, current_fh,
+ open->op_name, open->op_namelen, &resfh);
+ fh_unlock(current_fh);
+ }
+
+ if (!status) {
+ set_change_info(&open->op_cinfo, current_fh);
+ fh_dup2(current_fh, &resfh);
+
+ 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);
+ status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
+ }
+
+ fh_put(&resfh);
+ return status;
+}
+
+static int
+nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+ struct iattr iattr;
+ int status;
+
+ if (open->op_truncate) {
+ iattr.ia_valid = ATTR_SIZE;
+ iattr.ia_size = 0;
+ status = nfsd_setattr(rqstp, current_fh, &iattr, 0, (time_t)0);
+ if (status)
+ return status;
+ }
+
+ memset(&open->op_stateid, 0xff, sizeof(stateid_t));
+ open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
+ return 0;
+}
+
+static inline int
+nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+ int status;
+
+ /* This check required by spec. */
+ if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
+ return nfserr_inval;
+
+ /*
+ * For now, we have no state, so we may as well implement an
+ * even stronger check...
+ */
+ if (open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
+ return nfserr_notsupp;
+
+ /*
+ * This block of code will (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)
+ return status;
+
+ /*
+ * 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);
+ if (status)
+ return status;
+
+ /*
+ * To finish the open response, we just need to set the rflags.
+ */
+ open->op_rflags = 0;
+ return 0;
+}
+
+static inline int
+nfsd4_renew(clientid_t *clientid)
+{
+ return nfs_ok;
+}
+
+static inline int
+nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclientid)
+{
+ memset(&setclientid->se_clientid, 0, sizeof(clientid_t));
+ return nfs_ok;
+}
+
+static inline int
+nfsd4_setclientid_confirm(struct svc_rqst *rqstp, clientid_t *clientid)
+{
+ return nfs_ok;
+}
+
+/*
+ * 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(¤t_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)
+{
+ fh_put(current_fh);
+ return exp_pseudoroot(rqstp->rq_client, current_fh);
+}
+
+static inline int
+nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
+{
+ if (!save_fh->fh_dentry)
+ return nfserr_nofilehandle;
+
+ 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)
+{
+ u32 *p = (u32 *)commit->co_verf;
+ *p++ = nfssvc_boot.tv_sec;
+ *p++ = nfssvc_boot.tv_usec;
+
+ return nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count);
+}
+
+static inline int
+nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create)
+{
+ struct svc_fh resfh;
+ int status;
+
+ fh_init(&resfh, NFS4_FHSIZE);
+
+ status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE);
+ 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:
+ if (create->cr_specdata1 >= MAX_BLKDEV || create->cr_specdata2 > 0xFF)
+ return nfserr_inval;
+ status = nfsd_create(rqstp, current_fh, create->cr_name,
+ create->cr_namelen, &create->cr_iattr, S_IFBLK,
+ MKDEV(create->cr_specdata1, create->cr_specdata2),
+ &resfh);
+ break;
+
+ case NF4CHR:
+ if (create->cr_specdata1 >= MAX_CHRDEV || create->cr_specdata2 > 0xFF)
+ return nfserr_inval;
+ status = nfsd_create(rqstp, current_fh, create->cr_name,
+ create->cr_namelen, &create->cr_iattr, S_IFCHR,
+ MKDEV(create->cr_specdata1, create->cr_specdata2),
+ &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:
+ BUG();
+ }
+
+ 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;
+
+ 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 inline int
+nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh)
+{
+ /*
+ * XXX: We currently violate the spec in one small respect
+ * here. If LOOKUPP is done at the root of the pseudofs,
+ * the spec requires us to return NFSERR_NOENT. Personally,
+ * I think that leaving the filehandle unchanged is more
+ * logical, but this is an academic question anyway, since
+ * no clients actually use LOOKUPP.
+ */
+ 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)
+{
+ /* no need to check permission - this will be done in nfsd_read() */
+
+ if (read->rd_offset >= OFFSET_MAX)
+ return nfserr_inval;
+
+ read->rd_rqstp = rqstp;
+ read->rd_fhp = current_fh;
+ return nfs_ok;
+}
+
+static inline int
+nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir)
+{
+ /* 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 (readdir->rd_cookie > ~(u32)0)
+ 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) {
+ 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;
+
+ status = nfsd_rename(rqstp, save_fh, rename->rn_sname,
+ rename->rn_snamelen, current_fh,
+ rename->rn_tname, rename->rn_tnamelen);
+ 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)
+{
+ return nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr, 0, (time_t)0);
+}
+
+static inline int
+nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write)
+{
+ u32 *p;
+
+ /* no need to check permission - this will be done in nfsd_write() */
+
+ if (write->wr_offset >= OFFSET_MAX)
+ return nfserr_inval;
+
+ write->wr_bytes_written = write->wr_buflen;
+ write->wr_how_written = write->wr_stable_how;
+ p = (u32 *)write->wr_verifier;
+ *p++ = nfssvc_boot.tv_sec;
+ *p++ = nfssvc_boot.tv_usec;
+
+ return nfsd_write(rqstp, current_fh, write->wr_offset,
+ write->wr_buf, write->wr_buflen, &write->wr_how_written);
+}
+
+/* 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_notsupp;
+ if (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);
+
+ /* 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;
+ struct svc_fh save_fh;
+ int slack_space; /* in words, not bytes! */
+ int status;
+
+ fh_init(¤t_fh, NFS4_FHSIZE);
+ fh_init(&save_fh, NFS4_FHSIZE);
+
+ resp->p = rqstp->rq_resbuf.buf + 3 + XDR_QUADLEN(args->taglen);
+ resp->end = rqstp->rq_resbuf.base + rqstp->rq_resbuf.buflen;
+ resp->taglen = args->taglen;
+ resp->tag = args->tag;
+ resp->opcnt = 0;
+
+ /*
+ * 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.
+ */
+ 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;
+ }
+
+ switch (op->opnum) {
+ case OP_ACCESS:
+ op->status = nfsd4_access(rqstp, ¤t_fh, &op->u.access);
+ break;
+ case OP_CLOSE:
+ op->status = nfsd4_close(rqstp, ¤t_fh, &op->u.close);
+ break;
+ case OP_COMMIT:
+ op->status = nfsd4_commit(rqstp, ¤t_fh, &op->u.commit);
+ break;
+ case OP_CREATE:
+ op->status = nfsd4_create(rqstp, ¤t_fh, &op->u.create);
+ break;
+ case OP_GETATTR:
+ op->status = nfsd4_getattr(rqstp, ¤t_fh, &op->u.getattr);
+ break;
+ case OP_GETFH:
+ op->status = nfsd4_getfh(¤t_fh, &op->u.getfh);
+ break;
+ case OP_LINK:
+ op->status = nfsd4_link(rqstp, ¤t_fh, &save_fh, &op->u.link);
+ break;
+ case OP_LOOKUP:
+ op->status = nfsd4_lookup(rqstp, ¤t_fh, &op->u.lookup);
+ break;
+ case OP_LOOKUPP:
+ op->status = nfsd4_lookupp(rqstp, ¤t_fh);
+ break;
+ case OP_NVERIFY:
+ op->status = nfsd4_verify(rqstp, ¤t_fh, &op->u.nverify);
+ if (op->status == nfserr_not_same)
+ op->status = nfs_ok;
+ break;
+ case OP_OPEN:
+ op->status = nfsd4_open(rqstp, ¤t_fh, &op->u.open);
+ break;
+ case OP_PUTFH:
+ op->status = nfsd4_putfh(rqstp, ¤t_fh, &op->u.putfh);
+ break;
+ case OP_PUTROOTFH:
+ op->status = nfsd4_putrootfh(rqstp, ¤t_fh);
+ break;
+ case OP_READ:
+ op->status = nfsd4_read(rqstp, ¤t_fh, &op->u.read);
+ break;
+ case OP_READDIR:
+ op->status = nfsd4_readdir(rqstp, ¤t_fh, &op->u.readdir);
+ break;
+ case OP_READLINK:
+ op->status = nfsd4_readlink(rqstp, ¤t_fh, &op->u.readlink);
+ break;
+ case OP_REMOVE:
+ op->status = nfsd4_remove(rqstp, ¤t_fh, &op->u.remove);
+ break;
+ case OP_RENAME:
+ op->status = nfsd4_rename(rqstp, ¤t_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(¤t_fh, &save_fh);
+ break;
+ case OP_SAVEFH:
+ op->status = nfsd4_savefh(¤t_fh, &save_fh);
+ break;
+ case OP_SETATTR:
+ op->status = nfsd4_setattr(rqstp, ¤t_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, ¤t_fh, &op->u.verify);
+ if (op->status == nfserr_same)
+ op->status = nfs_ok;
+ break;
+ case OP_WRITE:
+ op->status = nfsd4_write(rqstp, ¤t_fh, &op->u.write);
+ break;
+ default:
+ BUG_ON(op->status == nfs_ok);
+ break;
+ }
+
+encode_op:
+ nfsd4_encode_operation(resp, op);
+ status = op->status;
+ }
+
+out:
+ if (args->ops != args->iops) {
+ kfree(args->ops);
+ args->ops = args->iops;
+ }
+ fh_put(¤t_fh);
+ fh_put(&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.
+ */
+struct svc_procedure nfsd_procedures4[2] = {
+ PROC(null, void, void, void, RC_NOCACHE, 1),
+ PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE)
+};
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
--- /dev/null
+/*
+ * fs/nfs/nfs4xdr.c
+ *
+ * Server-side XDR for NFSv4
+ *
+ * Copyright (c) 2002 The Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Kendrick Smith <kmsmith@umich.edu>
+ * Andy Adamson <andros@umich.edu>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * TODO: Neil Brown made the following observation: We currently
+ * initially reserve NFSD_BUFSIZE space on the transmit queue and
+ * never release any of that until the request is complete.
+ * It would be good to calculate a new maximum response size while
+ * decoding the COMPOUND, and call svc_reserve with this number
+ * at the end of nfs4svc_decode_compoundargs.
+ */
+
+#include <linux/param.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/compatmac.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+
+#include <linux/sunrpc/xdr.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/name_lookup.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/xdr4.h>
+
+#define NFSDDBG_FACILITY NFSDDBG_XDR
+
+/*
+ * From Peter Astrand <peter@cendio.se>: The following routines check
+ * whether a filename supplied by the client is valid.
+ */
+static const char trailing_bytes_for_utf8[256] = {
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
+};
+
+static inline int
+is_legal_iso_utf8_sequence(unsigned char *source, int length)
+{
+ unsigned char a;
+ unsigned char *srcptr;
+
+ srcptr = source + length;
+
+ switch (length) {
+ /* Everything else falls through when "1"... */
+ default:
+ /* Sequences with more than 6 bytes are invalid */
+ return 0;
+
+ /*
+ Byte 3-6 must be 80..BF
+ */
+ case 6:
+ if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0;
+ case 5:
+ if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0;
+ case 4:
+ if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0;
+ case 3:
+ if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0;
+
+ case 2:
+ a = *--srcptr;
+
+ /* Upper limit */
+ if (a > 0xBF)
+ /* 2nd byte may never be > 0xBF */
+ return 0;
+
+ /*
+ Lower limits checks, to detect non-shortest forms.
+ No fall-through in this inner switch.
+ */
+ switch (*source) {
+ case 0xE0: /* 3 bytes */
+ if (a < 0xA0) return 0;
+ break;
+ case 0xF0: /* 4 bytes */
+ if (a < 0x90) return 0;
+ break;
+ case 0xF8: /* 5 bytes */
+ if (a < 0xC8) return 0;
+ break;
+ case 0xFC: /* 6 bytes */
+ if (a < 0x84) return 0;
+ break;
+ default:
+ /* In all cases, 2nd byte must be >= 0x80 (because leading
+ 10...) */
+ if (a < 0x80) return 0;
+ }
+
+ case 1:
+ /* Invalid ranges */
+ if (*source >= 0x80 && *source < 0xC2)
+ /* Multibyte char with value < 0xC2, non-shortest */
+ return 0;
+ if (*source > 0xFD)
+ /* Leading byte starting with 11111110 is illegal */
+ return 0;
+ if (!*source)
+ return 0;
+ }
+
+ return 1;
+}
+
+static int
+check_utf8(char *str, int len)
+{
+ unsigned char *chunk, *sourceend;
+ int chunklen;
+
+ chunk = str;
+ sourceend = str + len;
+
+ while (chunk < sourceend) {
+ chunklen = trailing_bytes_for_utf8[*chunk]+1;
+ if (chunk + chunklen > sourceend)
+ return nfserr_inval;
+ if (!is_legal_iso_utf8_sequence(chunk, chunklen))
+ return nfserr_inval;
+ chunk += chunklen;
+ }
+
+ return 0;
+}
+
+static int
+check_filename(char *str, int len, int err)
+{
+ int i;
+
+ if (len == 0)
+ return nfserr_inval;
+ if (isdotent(str, len))
+ return err;
+ for (i = 0; i < len; i++)
+ if (str[i] == '/')
+ return err;
+ return check_utf8(str, len);
+}
+
+/*
+ * START OF "GENERIC" DECODE ROUTINES.
+ * These may look a little ugly since they are imported from a "generic"
+ * set of XDR encode/decode routines which are intended to be shared by
+ * all of our NFSv4 implementations (OpenBSD, MacOS X...).
+ *
+ * If the pain of reading these is too great, it should be a straightforward
+ * task to translate them into Linux-specific versions which are more
+ * consistent with the style used in NFSv2/v3...
+ */
+#define DECODE_HEAD \
+ u32 *p; \
+ int status
+#define DECODE_TAIL \
+ status = 0; \
+out: \
+ return status; \
+xdr_error: \
+ printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
+ status = nfserr_bad_xdr; \
+ goto out
+
+#define READ32(x) (x) = ntohl(*p++)
+#define READ64(x) do { \
+ (x) = (u64)ntohl(*p++) << 32; \
+ (x) |= ntohl(*p++); \
+} while (0)
+#define READTIME(x) do { \
+ p++; \
+ (x) = ntohl(*p++); \
+ p++; \
+} while (0)
+#define READMEM(x,nbytes) do { \
+ x = (char *)p; \
+ p += XDR_QUADLEN(nbytes); \
+} while (0)
+#define COPYMEM(x,nbytes) do { \
+ memcpy((x), p, nbytes); \
+ p += XDR_QUADLEN(nbytes); \
+} while (0)
+
+#define READ_BUF(nbytes) do { \
+ if (nbytes > (u32)((char *)argp->end - (char *)argp->p)) { \
+ printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
+ goto xdr_error; \
+ } \
+ p = argp->p; \
+ argp->p += XDR_QUADLEN(nbytes); \
+} while (0)
+
+static int
+nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
+{
+ u32 bmlen;
+ DECODE_HEAD;
+
+ bmval[0] = 0;
+ bmval[1] = 0;
+
+ READ_BUF(4);
+ READ32(bmlen);
+ if (bmlen > 1000)
+ goto xdr_error;
+
+ READ_BUF(bmlen << 2);
+ if (bmlen > 0)
+ READ32(bmval[0]);
+ if (bmlen > 1)
+ READ32(bmval[1]);
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr)
+{
+ int expected_len, len = 0;
+ u32 dummy32;
+ char *buf;
+
+ DECODE_HEAD;
+ iattr->ia_valid = 0;
+ if ((status = nfsd4_decode_bitmap(argp, bmval)))
+ return status;
+
+ /*
+ * According to spec, unsupported attributes return ERR_NOTSUPP;
+ * read-only attributes return ERR_INVAL.
+ */
+ if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
+ return nfserr_notsupp;
+ if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
+ return nfserr_inval;
+
+ READ_BUF(4);
+ READ32(expected_len);
+
+ if (bmval[0] & FATTR4_WORD0_SIZE) {
+ READ_BUF(8);
+ len += 8;
+ READ64(iattr->ia_size);
+ iattr->ia_valid |= ATTR_SIZE;
+ }
+ if (bmval[1] & FATTR4_WORD1_MODE) {
+ READ_BUF(4);
+ len += 4;
+ READ32(iattr->ia_mode);
+ iattr->ia_mode &= (S_IFMT | S_IALLUGO);
+ iattr->ia_valid |= ATTR_MODE;
+ }
+ if (bmval[1] & FATTR4_WORD1_OWNER) {
+ READ_BUF(4);
+ len += 4;
+ READ32(dummy32);
+ READ_BUF(dummy32);
+ len += (XDR_QUADLEN(dummy32) << 2);
+ READMEM(buf, dummy32);
+ if (check_utf8(buf, dummy32))
+ return nfserr_inval;
+ if ((status = name_get_uid(buf, dummy32, &iattr->ia_uid)))
+ goto out_nfserr;
+ iattr->ia_valid |= ATTR_UID;
+ }
+ if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
+ READ_BUF(4);
+ len += 4;
+ READ32(dummy32);
+ READ_BUF(dummy32);
+ len += (XDR_QUADLEN(dummy32) << 2);
+ READMEM(buf, dummy32);
+ if (check_utf8(buf, dummy32))
+ return nfserr_inval;
+ if ((status = name_get_gid(buf, dummy32, &iattr->ia_gid)))
+ goto out_nfserr;
+ iattr->ia_valid |= ATTR_GID;
+ }
+ if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
+ READ_BUF(4);
+ len += 4;
+ READ32(dummy32);
+ switch (dummy32) {
+ case NFS4_SET_TO_CLIENT_TIME:
+ /* We require the high 32 bits of 'seconds' to be 0, and we ignore
+ all 32 bits of 'nseconds'. */
+ READ_BUF(12);
+ len += 12;
+ READ32(dummy32);
+ if (dummy32)
+ return nfserr_inval;
+ READ32(iattr->ia_atime);
+ READ32(dummy32);
+ if (dummy32 >= (u32)1000000000)
+ return nfserr_inval;
+ iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
+ break;
+ case NFS4_SET_TO_SERVER_TIME:
+ iattr->ia_valid |= ATTR_ATIME;
+ break;
+ default:
+ goto xdr_error;
+ }
+ }
+ if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
+ /* We require the high 32 bits of 'seconds' to be 0, and we ignore
+ all 32 bits of 'nseconds'. */
+ READ_BUF(12);
+ len += 12;
+ READ32(dummy32);
+ if (dummy32)
+ return nfserr_inval;
+ READ32(iattr->ia_ctime);
+ READ32(dummy32);
+ if (dummy32 >= (u32)1000000000)
+ return nfserr_inval;
+ iattr->ia_valid |= ATTR_CTIME;
+ }
+ if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
+ READ_BUF(4);
+ len += 4;
+ READ32(dummy32);
+ switch (dummy32) {
+ case NFS4_SET_TO_CLIENT_TIME:
+ /* We require the high 32 bits of 'seconds' to be 0, and we ignore
+ all 32 bits of 'nseconds'. */
+ READ_BUF(12);
+ len += 12;
+ READ32(dummy32);
+ if (dummy32)
+ return nfserr_inval;
+ READ32(iattr->ia_mtime);
+ READ32(dummy32);
+ if (dummy32 >= (u32)1000000000)
+ return nfserr_inval;
+ iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
+ break;
+ case NFS4_SET_TO_SERVER_TIME:
+ iattr->ia_valid |= ATTR_MTIME;
+ break;
+ default:
+ goto xdr_error;
+ }
+ }
+ if (len != expected_len)
+ goto xdr_error;
+
+ DECODE_TAIL;
+
+out_nfserr:
+ status = nfserrno(status);
+ goto out;
+}
+
+static int
+nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(access->ac_req_access);
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4 + sizeof(stateid_t));
+ READ32(close->cl_seqid);
+ READ32(close->cl_stateid.st_generation);
+ COPYMEM(&close->cl_stateid.st_other, sizeof(stateid_other_t));
+
+ DECODE_TAIL;
+}
+
+
+static int
+nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
+{
+ DECODE_HEAD;
+
+ READ_BUF(12);
+ READ64(commit->co_offset);
+ READ32(commit->co_count);
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(create->cr_type);
+ switch (create->cr_type) {
+ case NF4LNK:
+ READ_BUF(4);
+ READ32(create->cr_linklen);
+ READ_BUF(create->cr_linklen);
+ READMEM(create->cr_linkname, create->cr_linklen);
+ if (check_utf8(create->cr_linkname, create->cr_linklen))
+ return nfserr_inval;
+ break;
+ case NF4BLK:
+ case NF4CHR:
+ READ_BUF(8);
+ READ32(create->cr_specdata1);
+ READ32(create->cr_specdata2);
+ break;
+ case NF4SOCK:
+ case NF4FIFO:
+ case NF4DIR:
+ break;
+ default:
+ goto xdr_error;
+ }
+
+ READ_BUF(4);
+ READ32(create->cr_namelen);
+ READ_BUF(create->cr_namelen);
+ READMEM(create->cr_name, create->cr_namelen);
+ if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
+ return status;
+
+ if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr)))
+ goto out;
+
+ DECODE_TAIL;
+}
+
+static inline int
+nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
+{
+ return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
+}
+
+static int
+nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(link->li_namelen);
+ READ_BUF(link->li_namelen);
+ READMEM(link->li_name, link->li_namelen);
+ if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
+ return status;
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(lookup->lo_len);
+ READ_BUF(lookup->lo_len);
+ READMEM(lookup->lo_name, lookup->lo_len);
+ if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
+ return status;
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
+{
+ DECODE_HEAD;
+
+ memset(open->op_bmval, 0, sizeof(open->op_bmval));
+ open->op_iattr.ia_valid = 0;
+
+ /* seqid, share_access, share_deny, clientid, ownerlen */
+ READ_BUF(16 + sizeof(clientid_t));
+ READ32(open->op_seqid);
+ READ32(open->op_share_access);
+ READ32(open->op_share_deny);
+ COPYMEM(&open->op_clientid, sizeof(clientid_t));
+ READ32(open->op_ownerlen);
+
+ /* owner, open_flag */
+ READ_BUF(open->op_ownerlen + 4);
+ READMEM(open->op_owner, open->op_ownerlen);
+ READ32(open->op_create);
+ switch (open->op_create) {
+ case NFS4_OPEN_NOCREATE:
+ break;
+ case NFS4_OPEN_CREATE:
+ READ_BUF(4);
+ READ32(open->op_createmode);
+ switch (open->op_createmode) {
+ case NFS4_CREATE_UNCHECKED:
+ case NFS4_CREATE_GUARDED:
+ if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr)))
+ goto out;
+ break;
+ case NFS4_CREATE_EXCLUSIVE:
+ READ_BUF(8);
+ COPYMEM(open->op_verf, 8);
+ break;
+ default:
+ goto xdr_error;
+ }
+ break;
+ default:
+ goto xdr_error;
+ }
+
+ /* open_claim */
+ READ_BUF(4);
+ READ32(open->op_claim_type);
+ switch (open->op_claim_type) {
+ case NFS4_OPEN_CLAIM_NULL:
+ case NFS4_OPEN_CLAIM_DELEGATE_PREV:
+ READ_BUF(4);
+ READ32(open->op_namelen);
+ READ_BUF(open->op_namelen);
+ READMEM(open->op_name, open->op_namelen);
+ if ((status = check_filename(open->op_name, open->op_namelen, nfserr_inval)))
+ return status;
+ break;
+ case NFS4_OPEN_CLAIM_PREVIOUS:
+ READ_BUF(4);
+ READ32(open->op_delegate_type);
+ break;
+ case NFS4_OPEN_CLAIM_DELEGATE_CUR:
+ READ_BUF(sizeof(delegation_stateid_t) + 4);
+ COPYMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
+ READ32(open->op_namelen);
+ READ_BUF(open->op_namelen);
+ READMEM(open->op_name, open->op_namelen);
+ if ((status = check_filename(open->op_name, open->op_namelen, nfserr_inval)))
+ return status;
+ break;
+ default:
+ goto xdr_error;
+ }
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(putfh->pf_fhlen);
+ if (putfh->pf_fhlen > NFS4_FHSIZE)
+ goto xdr_error;
+ READ_BUF(putfh->pf_fhlen);
+ READMEM(putfh->pf_fhval, putfh->pf_fhlen);
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
+{
+ DECODE_HEAD;
+
+ READ_BUF(sizeof(stateid_t) + 12);
+ READ32(read->rd_stateid.st_generation);
+ COPYMEM(&read->rd_stateid.st_other, sizeof(stateid_other_t));
+ READ64(read->rd_offset);
+ READ32(read->rd_length);
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
+{
+ DECODE_HEAD;
+
+ READ_BUF(24);
+ READ64(readdir->rd_cookie);
+ COPYMEM(readdir->rd_verf, sizeof(nfs4_verifier));
+ READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
+ READ32(readdir->rd_maxcount);
+ if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
+ goto out;
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(remove->rm_namelen);
+ READ_BUF(remove->rm_namelen);
+ READMEM(remove->rm_name, remove->rm_namelen);
+ if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
+ return status;
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(rename->rn_snamelen);
+ READ_BUF(rename->rn_snamelen + 4);
+ READMEM(rename->rn_sname, rename->rn_snamelen);
+ READ32(rename->rn_tnamelen);
+ READ_BUF(rename->rn_tnamelen);
+ READMEM(rename->rn_tname, rename->rn_tnamelen);
+ if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
+ return status;
+ if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
+ return status;
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
+{
+ DECODE_HEAD;
+
+ READ_BUF(sizeof(clientid_t));
+ COPYMEM(clientid, sizeof(clientid_t));
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
+{
+ DECODE_HEAD;
+
+ READ_BUF(sizeof(stateid_t));
+ READ32(setattr->sa_stateid.st_generation);
+ COPYMEM(&setattr->sa_stateid.st_other, sizeof(stateid_other_t));
+ if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr)))
+ goto out;
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
+{
+ DECODE_HEAD;
+
+ READ_BUF(12);
+ COPYMEM(setclientid->se_verf, 8);
+ READ32(setclientid->se_namelen);
+
+ READ_BUF(setclientid->se_namelen + 8);
+ READMEM(setclientid->se_name, setclientid->se_namelen);
+ READ32(setclientid->se_callback_prog);
+ READ32(setclientid->se_callback_netid_len);
+
+ READ_BUF(setclientid->se_callback_netid_len + 4);
+ READMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
+ READ32(setclientid->se_callback_addr_len);
+
+ READ_BUF(setclientid->se_callback_addr_len + 4);
+ READMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
+ READ32(setclientid->se_callback_ident);
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, clientid_t *clientid)
+{
+ DECODE_HEAD;
+
+ READ_BUF(8);
+ COPYMEM(clientid, 8);
+
+ DECODE_TAIL;
+}
+
+/* Also used for NVERIFY */
+static int
+nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
+{
+ DECODE_HEAD;
+
+ if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
+ goto out;
+ READ_BUF(4);
+ READ32(verify->ve_attrlen);
+ READ_BUF(verify->ve_attrlen);
+ READMEM(verify->ve_attrval, verify->ve_attrlen);
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
+{
+ DECODE_HEAD;
+
+ READ_BUF(sizeof(stateid_t) + 16);
+ READ32(write->wr_stateid.st_generation);
+ COPYMEM(&write->wr_stateid.st_other, sizeof(stateid_other_t));
+ READ64(write->wr_offset);
+ READ32(write->wr_stable_how);
+ if (write->wr_stable_how > 2)
+ goto xdr_error;
+ READ32(write->wr_buflen);
+
+ READ_BUF(write->wr_buflen);
+ READMEM(write->wr_buf, write->wr_buflen);
+
+ DECODE_TAIL;
+}
+
+static int
+nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
+{
+ DECODE_HEAD;
+ struct nfsd4_op *op;
+ int i;
+
+ /*
+ * XXX: According to spec, we should check the tag
+ * for UTF-8 compliance. I'm postponing this for
+ * now because it seems that some clients do use
+ * binary tags.
+ */
+ READ_BUF(4);
+ READ32(argp->taglen);
+ READ_BUF(argp->taglen + 8);
+ READMEM(argp->tag, argp->taglen);
+ READ32(argp->minorversion);
+ READ32(argp->opcnt);
+
+ if (argp->taglen > NFSD4_MAX_TAGLEN)
+ goto xdr_error;
+ if (argp->opcnt > 100)
+ goto xdr_error;
+
+ if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) {
+ argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
+ if (!argp->ops) {
+ argp->ops = argp->iops;
+ printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
+ goto xdr_error;
+ }
+ }
+
+ for (i = 0; i < argp->opcnt; i++) {
+ op = &argp->ops[i];
+
+ /*
+ * Before reading the opcode, we test for the 4-byte buffer
+ * overrun explicitly, instead of using READ_BUF(). This is
+ * because we want a missing opcode to be treated as opcode
+ * OP_WRITE+1, instead of a failed XDR.
+ */
+ if (argp->p == argp->end) {
+ op->opnum = OP_WRITE + 1;
+ op->status = nfserr_bad_xdr;
+ argp->opcnt = i+1;
+ break;
+ }
+ op->opnum = ntohl(*argp->p++);
+
+ switch (op->opnum) {
+ case OP_ACCESS:
+ op->status = nfsd4_decode_access(argp, &op->u.access);
+ break;
+ case OP_CLOSE:
+ op->status = nfsd4_decode_close(argp, &op->u.close);
+ break;
+ case OP_COMMIT:
+ op->status = nfsd4_decode_commit(argp, &op->u.commit);
+ break;
+ case OP_CREATE:
+ op->status = nfsd4_decode_create(argp, &op->u.create);
+ break;
+ case OP_GETATTR:
+ op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
+ break;
+ case OP_GETFH:
+ op->status = nfs_ok;
+ break;
+ case OP_LINK:
+ op->status = nfsd4_decode_link(argp, &op->u.link);
+ break;
+ case OP_LOOKUP:
+ op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
+ break;
+ case OP_LOOKUPP:
+ op->status = nfs_ok;
+ break;
+ case OP_NVERIFY:
+ op->status = nfsd4_decode_verify(argp, &op->u.nverify);
+ break;
+ case OP_OPEN:
+ op->status = nfsd4_decode_open(argp, &op->u.open);
+ break;
+ case OP_PUTFH:
+ op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
+ break;
+ case OP_PUTROOTFH:
+ op->status = nfs_ok;
+ break;
+ case OP_READ:
+ op->status = nfsd4_decode_read(argp, &op->u.read);
+ break;
+ case OP_READDIR:
+ op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
+ break;
+ case OP_READLINK:
+ op->status = nfs_ok;
+ break;
+ case OP_REMOVE:
+ op->status = nfsd4_decode_remove(argp, &op->u.remove);
+ break;
+ case OP_RENAME:
+ op->status = nfsd4_decode_rename(argp, &op->u.rename);
+ break;
+ case OP_RESTOREFH:
+ op->status = nfs_ok;
+ break;
+ case OP_RENEW:
+ op->status = nfsd4_decode_renew(argp, &op->u.renew);
+ break;
+ case OP_SAVEFH:
+ op->status = nfs_ok;
+ break;
+ case OP_SETATTR:
+ op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
+ break;
+ case OP_SETCLIENTID:
+ op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
+ break;
+ case OP_SETCLIENTID_CONFIRM:
+ op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
+ break;
+ case OP_VERIFY:
+ op->status = nfsd4_decode_verify(argp, &op->u.verify);
+ break;
+ case OP_WRITE:
+ op->status = nfsd4_decode_write(argp, &op->u.write);
+ break;
+ default:
+ /*
+ * According to spec, anything greater than OP_WRITE
+ * is treated as OP_WRITE+1 in the response.
+ */
+ if (op->opnum > OP_WRITE)
+ op->opnum = OP_WRITE + 1;
+ op->status = nfserr_notsupp;
+ break;
+ }
+
+ if (op->status) {
+ argp->opcnt = i+1;
+ break;
+ }
+ }
+
+ DECODE_TAIL;
+}
+/*
+ * END OF "GENERIC" DECODE ROUTINES.
+ */
+
+/*
+ * START OF "GENERIC" ENCODE ROUTINES.
+ * These may look a little ugly since they are imported from a "generic"
+ * set of XDR encode/decode routines which are intended to be shared by
+ * all of our NFSv4 implementations (OpenBSD, MacOS X...).
+ *
+ * If the pain of reading these is too great, it should be a straightforward
+ * task to translate them into Linux-specific versions which are more
+ * consistent with the style used in NFSv2/v3...
+ */
+#define ENCODE_HEAD u32 *p
+
+#define WRITE32(n) *p++ = htonl(n)
+#define WRITE64(n) do { \
+ *p++ = htonl((u32)((n) >> 32)); \
+ *p++ = htonl((u32)(n)); \
+} while (0)
+#define WRITEMEM(ptr,nbytes) do { \
+ memcpy(p, ptr, nbytes); \
+ p += XDR_QUADLEN(nbytes); \
+} while (0)
+#define WRITECINFO(c) do { \
+ *p++ = htonl(c.atomic); \
+ *p++ = htonl(c.before_size); \
+ *p++ = htonl(c.before_ctime); \
+ *p++ = htonl(c.after_size); \
+ *p++ = htonl(c.after_ctime); \
+} while (0)
+
+#define RESERVE_SPACE(nbytes) do { \
+ p = resp->p; \
+ BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
+} while (0)
+#define ADJUST_ARGS() resp->p = p
+
+static u32 nfs4_ftypes[16] = {
+ NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
+ NF4DIR, NF4BAD, NF4BLK, NF4BAD,
+ NF4REG, NF4BAD, NF4LNK, NF4BAD,
+ NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
+};
+
+/*
+ * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
+ * ourselves.
+ *
+ * @countp is the buffer size in _words_; upon successful return this becomes
+ * replaced with the number of words written.
+ */
+int
+nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
+ struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval)
+{
+ u32 bmval0 = bmval[0];
+ u32 bmval1 = bmval[1];
+ struct kstat stat;
+ struct name_ent *owner = NULL;
+ struct name_ent *group = NULL;
+ struct svc_fh tempfh;
+ struct statfs statfs;
+ int buflen = *countp << 2;
+ u32 *attrlenp;
+ u32 dummy;
+ u64 dummy64;
+ u32 *p = buffer;
+ int status;
+
+ BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
+ BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
+ BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
+
+ status = vfs_getattr(exp->ex_mnt, dentry, &stat);
+ if (status)
+ goto out_nfserr;
+ if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
+ (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
+ FATTR4_WORD1_SPACE_TOTAL))) {
+ status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
+ if (status)
+ goto out_nfserr;
+ }
+ if ((bmval0 & FATTR4_WORD0_FILEHANDLE) && !fhp) {
+ fh_init(&tempfh, NFS4_FHSIZE);
+ status = fh_compose(&tempfh, exp, dentry, NULL);
+ if (status)
+ goto out;
+ fhp = &tempfh;
+ }
+ if (bmval1 & FATTR4_WORD1_OWNER) {
+ status = name_get_user(stat.uid, &owner);
+ if (status)
+ goto out_nfserr;
+ }
+ if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
+ status = name_get_group(stat.gid, &group);
+ if (status)
+ goto out_nfserr;
+ }
+
+ if ((buflen -= 16) < 0)
+ goto out_resource;
+
+ WRITE32(2);
+ WRITE32(bmval0);
+ WRITE32(bmval1);
+ attrlenp = p++; /* to be backfilled later */
+
+ if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
+ if ((buflen -= 12) < 0)
+ goto out_resource;
+ WRITE32(2);
+ WRITE32(NFSD_SUPPORTED_ATTRS_WORD0);
+ WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
+ }
+ if (bmval0 & FATTR4_WORD0_TYPE) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
+ if (dummy == NF4BAD)
+ goto out_serverfault;
+ WRITE32(dummy);
+ }
+ if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME );
+ }
+ if (bmval0 & FATTR4_WORD0_CHANGE) {
+ /*
+ * XXX: We currently use the inode ctime as the nfsv4 "changeid"
+ * attribute. This violates the spec, which says
+ *
+ * The server may return the object's time_modify attribute
+ * for this attribute, but only if the file system object
+ * can not be updated more frequently than the resolution
+ * of time_modify.
+ *
+ * Since we only have 1-second ctime resolution, this is a pretty
+ * serious violation. Indeed, 1-second ctime resolution is known
+ * to be a problem in practice in the NFSv3 world.
+ *
+ * The real solution to this problem is probably to work on
+ * adding high-resolution mtimes to the VFS layer.
+ *
+ * Note: Started using i_size for the high 32 bits of the changeid.
+ *
+ * Note 2: This _must_ be consistent with the scheme for writing
+ * change_info, so any changes made here must be reflected there
+ * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
+ * macro above.)
+ */
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE32(stat.size);
+ WRITE32(stat.mtime);
+ }
+ if (bmval0 & FATTR4_WORD0_SIZE) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE64(stat.size);
+ }
+ if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(0);
+ }
+ if (bmval0 & FATTR4_WORD0_FSID) {
+ if ((buflen -= 16) < 0)
+ goto out_resource;
+ WRITE32(0);
+ WRITE32(MAJOR(stat.dev));
+ WRITE32(0);
+ WRITE32(MINOR(stat.dev));
+ }
+ if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(0);
+ }
+ if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(NFSD_LEASE_TIME);
+ }
+ if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(0);
+ }
+ if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(0);
+ }
+ if (bmval0 & FATTR4_WORD0_CANSETTIME) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
+ buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
+ if (buflen < 0)
+ goto out_resource;
+ WRITE32(fhp->fh_handle.fh_size);
+ WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
+ }
+ if (bmval0 & FATTR4_WORD0_FILEID) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE64((u64) stat.ino);
+ }
+ if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE64((u64) statfs.f_ffree);
+ }
+ if (bmval0 & FATTR4_WORD0_FILES_FREE) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE64((u64) statfs.f_ffree);
+ }
+ if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE64((u64) statfs.f_files);
+ }
+ if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(1);
+ }
+ if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE64(~(u64)0);
+ }
+ if (bmval0 & FATTR4_WORD0_MAXLINK) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(255);
+ }
+ if (bmval0 & FATTR4_WORD0_MAXNAME) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(~(u32) 0);
+ }
+ if (bmval0 & FATTR4_WORD0_MAXREAD) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE64((u64) NFSSVC_MAXBLKSIZE);
+ }
+ if (bmval0 & FATTR4_WORD0_MAXWRITE) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE64((u64) NFSSVC_MAXBLKSIZE);
+ }
+ if (bmval1 & FATTR4_WORD1_MODE) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(stat.mode & S_IALLUGO);
+ }
+ if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(1);
+ }
+ if (bmval1 & FATTR4_WORD1_NUMLINKS) {
+ if ((buflen -= 4) < 0)
+ goto out_resource;
+ WRITE32(stat.nlink);
+ }
+ if (bmval1 & FATTR4_WORD1_OWNER) {
+ int namelen = strlen(owner->name);
+ buflen -= (XDR_QUADLEN(namelen) << 2) + 4;
+ if (buflen < 0)
+ goto out_resource;
+ WRITE32(namelen);
+ WRITEMEM(owner->name, namelen);
+ }
+ if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
+ int namelen = strlen(group->name);
+ buflen -= (XDR_QUADLEN(namelen) << 2) + 4;
+ if (buflen < 0)
+ goto out_resource;
+ WRITE32(namelen);
+ WRITEMEM(group->name, namelen);
+ }
+ if (bmval1 & FATTR4_WORD1_RAWDEV) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ WRITE32((u32) MAJOR(stat.rdev));
+ WRITE32((u32) MINOR(stat.rdev));
+ }
+ if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
+ WRITE64(dummy64);
+ }
+ if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
+ WRITE64(dummy64);
+ }
+ if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
+ WRITE64(dummy64);
+ }
+ if (bmval1 & FATTR4_WORD1_SPACE_USED) {
+ if ((buflen -= 8) < 0)
+ goto out_resource;
+ dummy64 = (u64)stat.blocks << 9;
+ WRITE64(dummy64);
+ }
+ if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
+ if ((buflen -= 12) < 0)
+ goto out_resource;
+ WRITE32(0);
+ WRITE32(stat.atime);
+ WRITE32(0);
+ }
+ if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
+ if ((buflen -= 12) < 0)
+ goto out_resource;
+ WRITE32(0);
+ WRITE32(1);
+ WRITE32(0);
+ }
+ if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
+ if ((buflen -= 12) < 0)
+ goto out_resource;
+ WRITE32(0);
+ WRITE32(stat.ctime);
+ WRITE32(0);
+ }
+ if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
+ if ((buflen -= 12) < 0)
+ goto out_resource;
+ WRITE32(0);
+ WRITE32(stat.mtime);
+ WRITE32(0);
+ }
+
+ *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
+ *countp = p - buffer;
+ status = nfs_ok;
+
+out:
+ if (fhp == &tempfh)
+ fh_put(&tempfh);
+ if (owner)
+ name_put(owner);
+ if (group)
+ name_put(group);
+ return status;
+out_nfserr:
+ status = nfserrno(status);
+ goto out;
+out_resource:
+ *countp = 0;
+ status = nfserr_resource;
+ goto out;
+out_serverfault:
+ status = nfserr_serverfault;
+ goto out;
+}
+
+static int
+nfsd4_encode_dirent(struct readdir_cd *cd, const char *name, int namlen,
+ loff_t offset, ino_t ino, unsigned int d_type)
+{
+ int buflen;
+ u32 *p = cd->buffer;
+ u32 *attrlenp;
+ struct dentry *dentry;
+ u32 bmval0, bmval1;
+ int nfserr = 0;
+
+ /* In nfsv4, "." and ".." never make it onto the wire.. */
+ if (name && isdotent(name, namlen))
+ return 0;
+
+ if (cd->offset)
+ xdr_encode_hyper(cd->offset, (u64) offset);
+
+ /* nfsd_readdir calls us with name == 0 when it wants us to
+ * set the last offset entry. */
+ if (name == 0)
+ return 0;
+
+ buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
+ if (buflen < 0)
+ goto nospc;
+
+ *p++ = xdr_one; /* mark entry present */
+ cd->offset = p; /* remember pointer */
+ p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
+ p = xdr_encode_array(p, name, namlen); /* name length & name */
+
+ /*
+ * Now we come to the ugly part: writing the fattr for this entry.
+ */
+ bmval0 = cd->bmval[0];
+ bmval1 = cd->bmval[1];
+ if ((bmval0 & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_FILEID)) || bmval1) {
+ /*
+ * "Heavyweight" case: we have no choice except to
+ * call nfsd4_encode_fattr(). As far as I know,
+ * only Windows clients will trigger this code
+ * path.
+ */
+ dentry = lookup_one_len(name, cd->dirfh->fh_dentry, namlen);
+ if (IS_ERR(dentry)) {
+ nfserr = nfserrno(PTR_ERR(dentry));
+ goto error;
+ }
+
+ nfserr = nfsd4_encode_fattr(NULL, cd->dirfh->fh_export,
+ dentry, p, &buflen, cd->bmval);
+ dput(dentry);
+
+ if (!nfserr) {
+ p += buflen;
+ goto out;
+ }
+ if (nfserr == nfserr_resource)
+ goto nospc;
+
+error:
+ /*
+ * If we get here, we experienced a miscellaneous
+ * failure while writing the attributes. If the
+ * client requested the RDATTR_ERROR attribute,
+ * we stuff the error code into this attribute
+ * and continue. If this attribute was not requested,
+ * then in accordance with the spec, we fail the
+ * entire READDIR operation(!)
+ */
+ if (!(bmval0 & FATTR4_WORD0_RDATTR_ERROR)) {
+ cd->nfserr = nfserr;
+ return -EINVAL;
+ }
+
+ bmval0 = FATTR4_WORD0_RDATTR_ERROR;
+ bmval1 = 0;
+ /* falling through here will do the right thing... */
+ }
+
+ /*
+ * In the common "lightweight" case, we avoid
+ * the overhead of nfsd4_encode_fattr() by assembling
+ * a small fattr by hand.
+ */
+ if (buflen < 6)
+ goto nospc;
+ *p++ = htonl(2);
+ *p++ = htonl(bmval0);
+ *p++ = htonl(bmval1);
+
+ attrlenp = p++;
+ if (bmval0 & FATTR4_WORD0_RDATTR_ERROR)
+ *p++ = nfserr; /* no htonl */
+ if (bmval0 & FATTR4_WORD0_FILEID)
+ p = xdr_encode_hyper(p, (u64)ino);
+ *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
+
+out:
+ cd->buflen -= (p - cd->buffer);
+ cd->buffer = p;
+ return 0;
+
+nospc:
+ cd->eob = 1;
+ return -EINVAL;
+}
+
+static void
+nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
+{
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ RESERVE_SPACE(8);
+ WRITE32(access->ac_supported);
+ WRITE32(access->ac_resp_access);
+ ADJUST_ARGS();
+ }
+}
+
+static void
+nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
+{
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ RESERVE_SPACE(sizeof(stateid_t));
+ WRITE32(close->cl_stateid.st_generation);
+ WRITEMEM(&close->cl_stateid.st_other, sizeof(stateid_other_t));
+ ADJUST_ARGS();
+ }
+}
+
+
+static void
+nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
+{
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ RESERVE_SPACE(8);
+ WRITEMEM(commit->co_verf, 8);
+ ADJUST_ARGS();
+ }
+}
+
+static void
+nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
+{
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ RESERVE_SPACE(32);
+ WRITECINFO(create->cr_cinfo);
+ WRITE32(2);
+ WRITE32(create->cr_bmval[0]);
+ WRITE32(create->cr_bmval[1]);
+ ADJUST_ARGS();
+ }
+}
+
+static int
+nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
+{
+ struct svc_fh *fhp = getattr->ga_fhp;
+ int buflen;
+
+ if (nfserr)
+ return nfserr;
+
+ buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
+ nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
+ resp->p, &buflen, getattr->ga_bmval);
+
+ if (!nfserr)
+ resp->p += buflen;
+ return nfserr;
+}
+
+static void
+nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
+{
+ unsigned int len;
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ len = fhp->fh_handle.fh_size;
+ RESERVE_SPACE(len + 4);
+ WRITE32(len);
+ WRITEMEM(&fhp->fh_handle.fh_base, len);
+ ADJUST_ARGS();
+ }
+}
+
+static void
+nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
+{
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ RESERVE_SPACE(20);
+ WRITECINFO(link->li_cinfo);
+ ADJUST_ARGS();
+ }
+}
+
+
+static void
+nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
+{
+ ENCODE_HEAD;
+
+ if (nfserr)
+ return;
+
+ RESERVE_SPACE(36 + sizeof(stateid_t));
+ WRITE32(open->op_stateid.st_generation);
+ WRITEMEM(&open->op_stateid.st_other, sizeof(stateid_other_t));
+ WRITECINFO(open->op_cinfo);
+ WRITE32(open->op_rflags);
+ WRITE32(2);
+ WRITE32(open->op_bmval[0]);
+ WRITE32(open->op_bmval[1]);
+ WRITE32(open->op_delegate_type);
+ ADJUST_ARGS();
+
+ switch (open->op_delegate_type) {
+ case NFS4_OPEN_DELEGATE_NONE:
+ break;
+ case NFS4_OPEN_DELEGATE_READ:
+ RESERVE_SPACE(20 + sizeof(delegation_stateid_t));
+ WRITEMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
+ WRITE32(0);
+
+ /*
+ * TODO: ACE's in delegations
+ */
+ WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
+ WRITE32(0);
+ WRITE32(0);
+ WRITE32(0); /* XXX: is NULL principal ok? */
+ ADJUST_ARGS();
+ break;
+ case NFS4_OPEN_DELEGATE_WRITE:
+ RESERVE_SPACE(32 + sizeof(delegation_stateid_t));
+ WRITEMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
+ WRITE32(0);
+
+ /*
+ * TODO: space_limit's in delegations
+ */
+ WRITE32(NFS4_LIMIT_SIZE);
+ WRITE32(~(u32)0);
+ WRITE32(~(u32)0);
+
+ /*
+ * TODO: ACE's in delegations
+ */
+ WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
+ WRITE32(0);
+ WRITE32(0);
+ WRITE32(0); /* XXX: is NULL principal ok? */
+ ADJUST_ARGS();
+ break;
+ default:
+ BUG();
+ }
+}
+
+static int
+nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
+{
+ u32 eof;
+ unsigned long maxcount;
+ ENCODE_HEAD;
+
+ if (nfserr)
+ return nfserr;
+
+ maxcount = (char *)resp->end - (char *)resp->p - COMPOUND_ERR_SLACK_SPACE - 8;
+ if (maxcount > read->rd_length)
+ maxcount = read->rd_length;
+ RESERVE_SPACE(maxcount + 8);
+
+ nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp,
+ read->rd_offset, (char *)p + 8, &maxcount);
+ if (nfserr)
+ return nfserr;
+ eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
+
+ WRITE32(eof);
+ WRITE32(maxcount);
+ p += XDR_QUADLEN(maxcount);
+ ADJUST_ARGS();
+ return 0;
+}
+
+static int
+nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
+{
+ int maxcount;
+ ENCODE_HEAD;
+
+ if (nfserr)
+ return nfserr;
+
+ maxcount = (char *)resp->end - (char *)resp->p - COMPOUND_ERR_SLACK_SPACE - 4;
+ RESERVE_SPACE(maxcount + 4);
+
+ /*
+ * XXX: By default, the ->readlink() VFS op will truncate symlinks
+ * if they would overflow the buffer. Is this kosher in NFSv4? If
+ * not, one easy fix is: if ->readlink() precisely fills the buffer,
+ * assume that truncation occured, and return NFS4ERR_RESOURCE.
+ */
+ nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, (char *)p + 4, &maxcount);
+ if (nfserr)
+ return nfserr;
+
+ WRITE32(maxcount);
+ p += XDR_QUADLEN(maxcount);
+ ADJUST_ARGS();
+ return 0;
+}
+
+static int
+nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
+{
+ int maxcount;
+ ENCODE_HEAD;
+
+ if (nfserr)
+ return nfserr;
+
+ RESERVE_SPACE(16);
+
+ maxcount = (char *)resp->end - (char *)p - COMPOUND_ERR_SLACK_SPACE;
+ if (maxcount > readdir->rd_maxcount)
+ maxcount = readdir->rd_maxcount;
+
+ /*
+ * Convert from bytes to words, account for the two words already
+ * written, make sure to leave two words at the end for the next
+ * pointer and eof field.
+ */
+ maxcount = (maxcount >> 2) - 4;
+ if (maxcount < 0)
+ return nfserr_readdir_nospc;
+
+ /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
+ WRITE32(0);
+ WRITE32(0);
+
+ nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
+ readdir->rd_cookie, nfsd4_encode_dirent,
+ p, &maxcount, NULL, readdir->rd_bmval);
+ if (!nfserr) {
+ /*
+ * nfsd_readdir() expects 'maxcount' to be a count of
+ * words, but fills it in with a count of bytes at the
+ * end!
+ */
+ BUG_ON(maxcount & 3);
+ p += (maxcount >> 2);
+ ADJUST_ARGS();
+ }
+ return nfserr;
+}
+
+static void
+nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
+{
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ RESERVE_SPACE(20);
+ WRITECINFO(remove->rm_cinfo);
+ ADJUST_ARGS();
+ }
+}
+
+static void
+nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
+{
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ RESERVE_SPACE(40);
+ WRITECINFO(rename->rn_sinfo);
+ WRITECINFO(rename->rn_tinfo);
+ ADJUST_ARGS();
+ }
+}
+
+/*
+ * The SETATTR encode routine is special -- it always encodes a bitmap,
+ * regardless of the error status.
+ */
+static void
+nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
+{
+ ENCODE_HEAD;
+
+ RESERVE_SPACE(12);
+ if (nfserr) {
+ WRITE32(2);
+ WRITE32(0);
+ WRITE32(0);
+ }
+ else {
+ WRITE32(2);
+ WRITE32(setattr->sa_bmval[0]);
+ WRITE32(setattr->sa_bmval[1]);
+ }
+ ADJUST_ARGS();
+}
+
+static void
+nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
+{
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ RESERVE_SPACE(8);
+ WRITEMEM(&scd->se_clientid, 8);
+ ADJUST_ARGS();
+ }
+ else if (nfserr == nfserr_clid_inuse) {
+ RESERVE_SPACE(8);
+ WRITE32(0);
+ WRITE32(0);
+ ADJUST_ARGS();
+ }
+}
+
+static void
+nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
+{
+ ENCODE_HEAD;
+
+ if (!nfserr) {
+ RESERVE_SPACE(16);
+ WRITE32(write->wr_bytes_written);
+ WRITE32(write->wr_how_written);
+ WRITEMEM(write->wr_verifier, 8);
+ ADJUST_ARGS();
+ }
+}
+
+void
+nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
+{
+ u32 *statp;
+ ENCODE_HEAD;
+
+ RESERVE_SPACE(8);
+ WRITE32(op->opnum);
+ statp = p++; /* to be backfilled at the end */
+ ADJUST_ARGS();
+
+ switch (op->opnum) {
+ case OP_ACCESS:
+ nfsd4_encode_access(resp, op->status, &op->u.access);
+ break;
+ case OP_CLOSE:
+ nfsd4_encode_close(resp, op->status, &op->u.close);
+ break;
+ case OP_COMMIT:
+ nfsd4_encode_commit(resp, op->status, &op->u.commit);
+ break;
+ case OP_CREATE:
+ nfsd4_encode_create(resp, op->status, &op->u.create);
+ break;
+ case OP_GETATTR:
+ op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
+ break;
+ case OP_GETFH:
+ nfsd4_encode_getfh(resp, op->status, op->u.getfh);
+ break;
+ case OP_LINK:
+ nfsd4_encode_link(resp, op->status, &op->u.link);
+ break;
+ case OP_LOOKUP:
+ break;
+ case OP_LOOKUPP:
+ break;
+ case OP_NVERIFY:
+ break;
+ case OP_OPEN:
+ nfsd4_encode_open(resp, op->status, &op->u.open);
+ break;
+ case OP_PUTFH:
+ break;
+ case OP_PUTROOTFH:
+ break;
+ case OP_READ:
+ op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
+ break;
+ case OP_READDIR:
+ op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
+ break;
+ case OP_READLINK:
+ op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
+ break;
+ case OP_REMOVE:
+ nfsd4_encode_remove(resp, op->status, &op->u.remove);
+ break;
+ case OP_RENAME:
+ nfsd4_encode_rename(resp, op->status, &op->u.rename);
+ break;
+ case OP_RENEW:
+ break;
+ case OP_RESTOREFH:
+ break;
+ case OP_SAVEFH:
+ break;
+ case OP_SETATTR:
+ nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
+ break;
+ case OP_SETCLIENTID:
+ nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
+ break;
+ case OP_SETCLIENTID_CONFIRM:
+ break;
+ case OP_VERIFY:
+ break;
+ case OP_WRITE:
+ nfsd4_encode_write(resp, op->status, &op->u.write);
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * Note: We write the status directly, instead of using WRITE32(),
+ * since it is already in network byte order.
+ */
+ *statp = op->status;
+}
+
+/*
+ * END OF "GENERIC" ENCODE ROUTINES.
+ */
+
+static inline int
+xdr_ressize_check(struct svc_rqst *rqstp, u32 *p)
+{
+ struct svc_buf *buf = &rqstp->rq_resbuf;
+
+ buf->len = p - buf->base;
+ dprintk("nfsd: ressize_check p %p base %p len %d\n",
+ p, buf->base, buf->buflen);
+ return (buf->len <= buf->buflen);
+}
+
+int
+nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
+{
+ return xdr_ressize_check(rqstp, p);
+}
+
+int
+nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
+{
+ int status;
+
+ args->p = p;
+ args->end = rqstp->rq_argbuf.base + rqstp->rq_argbuf.buflen;
+ args->ops = args->iops;
+
+ status = nfsd4_decode_compound(args);
+ if (status && args->ops != args->iops) {
+ kfree(args->ops);
+ args->ops = args->iops;
+ }
+ return !status;
+}
+
+int
+nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
+{
+ /*
+ * All that remains is to write the tag and operation count...
+ */
+ *p++ = htonl(resp->taglen);
+ memcpy(p, resp->tag, resp->taglen);
+ p += XDR_QUADLEN(resp->taglen);
+ *p++ = htonl(resp->opcnt);
+
+ BUG_ON(!xdr_ressize_check(rqstp, resp->p));
+ return 1;
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
projects / linux / commitdiff