2005-04-16 16:20:36 -06:00
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/*
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* linux/fs/nfsd/nfsfh.c
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*
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* NFS server file handle treatment.
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*
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* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
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* Portions Copyright (C) 1999 G. Allen Morris III <gam3@acm.org>
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* Extensive rewrite by Neil Brown <neilb@cse.unsw.edu.au> Southern-Spring 1999
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* ... and again Southern-Winter 2001 to support export_operations
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*/
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/unistd.h>
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#include <linux/string.h>
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#include <linux/stat.h>
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#include <linux/dcache.h>
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2007-07-17 05:04:28 -06:00
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#include <linux/exportfs.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/mount.h>
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2007-02-12 01:53:32 -07:00
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#include <linux/sunrpc/clnt.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/sunrpc/svc.h>
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#include <linux/nfsd/nfsd.h>
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#define NFSDDBG_FACILITY NFSDDBG_FH
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static int nfsd_nr_verified;
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static int nfsd_nr_put;
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extern struct export_operations export_op_default;
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#define CALL(ops,fun) ((ops->fun)?(ops->fun):export_op_default.fun)
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/*
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* our acceptability function.
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* if NOSUBTREECHECK, accept anything
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* if not, require that we can walk up to exp->ex_dentry
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* doing some checks on the 'x' bits
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*/
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static int nfsd_acceptable(void *expv, struct dentry *dentry)
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{
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struct svc_export *exp = expv;
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int rv;
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struct dentry *tdentry;
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struct dentry *parent;
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if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
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return 1;
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tdentry = dget(dentry);
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while (tdentry != exp->ex_dentry && ! IS_ROOT(tdentry)) {
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/* make sure parents give x permission to user */
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int err;
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parent = dget_parent(tdentry);
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err = permission(parent->d_inode, MAY_EXEC, NULL);
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if (err < 0) {
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dput(parent);
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break;
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}
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dput(tdentry);
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tdentry = parent;
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}
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if (tdentry != exp->ex_dentry)
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dprintk("nfsd_acceptable failed at %p %s\n", tdentry, tdentry->d_name.name);
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rv = (tdentry == exp->ex_dentry);
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dput(tdentry);
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return rv;
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}
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/* Type check. The correct error return for type mismatches does not seem to be
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* generally agreed upon. SunOS seems to use EISDIR if file isn't S_IFREG; a
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* comment in the NFSv3 spec says this is incorrect (implementation notes for
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* the write call).
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*/
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2006-10-20 00:28:55 -06:00
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static inline __be32
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2005-04-16 16:20:36 -06:00
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nfsd_mode_check(struct svc_rqst *rqstp, umode_t mode, int type)
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{
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/* Type can be negative when creating hardlinks - not to a dir */
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if (type > 0 && (mode & S_IFMT) != type) {
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if (rqstp->rq_vers == 4 && (mode & S_IFMT) == S_IFLNK)
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return nfserr_symlink;
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else if (type == S_IFDIR)
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return nfserr_notdir;
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else if ((mode & S_IFMT) == S_IFDIR)
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return nfserr_isdir;
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else
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return nfserr_inval;
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}
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if (type < 0 && (mode & S_IFMT) == -type) {
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if (rqstp->rq_vers == 4 && (mode & S_IFMT) == S_IFLNK)
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return nfserr_symlink;
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else if (type == -S_IFDIR)
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return nfserr_isdir;
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else
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return nfserr_notdir;
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}
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return 0;
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}
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/*
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* Perform sanity checks on the dentry in a client's file handle.
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*
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* Note that the file handle dentry may need to be freed even after
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* an error return.
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*
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* This is only called at the start of an nfsproc call, so fhp points to
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* a svc_fh which is all 0 except for the over-the-wire file handle.
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*/
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2006-10-20 00:28:55 -06:00
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__be32
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2005-04-16 16:20:36 -06:00
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fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
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{
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struct knfsd_fh *fh = &fhp->fh_handle;
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struct svc_export *exp = NULL;
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struct dentry *dentry;
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2006-10-20 00:28:55 -06:00
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__be32 error = 0;
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2005-04-16 16:20:36 -06:00
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dprintk("nfsd: fh_verify(%s)\n", SVCFH_fmt(fhp));
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if (!fhp->fh_dentry) {
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__u32 *datap=NULL;
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__u32 tfh[3]; /* filehandle fragment for oldstyle filehandles */
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int fileid_type;
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int data_left = fh->fh_size/4;
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error = nfserr_stale;
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if (rqstp->rq_client == NULL)
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goto out;
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if (rqstp->rq_vers > 2)
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error = nfserr_badhandle;
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if (rqstp->rq_vers == 4 && fh->fh_size == 0)
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return nfserr_nofilehandle;
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if (fh->fh_version == 1) {
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int len;
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datap = fh->fh_auth;
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if (--data_left<0) goto out;
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switch (fh->fh_auth_type) {
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case 0: break;
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default: goto out;
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}
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len = key_len(fh->fh_fsid_type) / 4;
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if (len == 0) goto out;
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2007-02-14 01:33:12 -07:00
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if (fh->fh_fsid_type == FSID_MAJOR_MINOR) {
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2005-04-16 16:20:36 -06:00
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/* deprecated, convert to type 3 */
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2007-02-14 01:33:12 -07:00
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len = key_len(FSID_ENCODE_DEV)/4;
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fh->fh_fsid_type = FSID_ENCODE_DEV;
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2005-04-16 16:20:36 -06:00
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fh->fh_fsid[0] = new_encode_dev(MKDEV(ntohl(fh->fh_fsid[0]), ntohl(fh->fh_fsid[1])));
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fh->fh_fsid[1] = fh->fh_fsid[2];
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}
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if ((data_left -= len)<0) goto out;
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exp = exp_find(rqstp->rq_client, fh->fh_fsid_type, datap, &rqstp->rq_chandle);
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datap += len;
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} else {
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dev_t xdev;
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ino_t xino;
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if (fh->fh_size != NFS_FHSIZE)
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goto out;
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/* assume old filehandle format */
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xdev = old_decode_dev(fh->ofh_xdev);
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xino = u32_to_ino_t(fh->ofh_xino);
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2007-02-14 01:33:12 -07:00
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mk_fsid(FSID_DEV, tfh, xdev, xino, 0, NULL);
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exp = exp_find(rqstp->rq_client, FSID_DEV, tfh,
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&rqstp->rq_chandle);
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2005-04-16 16:20:36 -06:00
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}
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2006-12-13 01:35:25 -07:00
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if (IS_ERR(exp) && (PTR_ERR(exp) == -EAGAIN
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|| PTR_ERR(exp) == -ETIMEDOUT)) {
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error = nfserrno(PTR_ERR(exp));
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2005-04-16 16:20:36 -06:00
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goto out;
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2006-12-13 01:35:25 -07:00
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}
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2005-04-16 16:20:36 -06:00
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error = nfserr_stale;
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if (!exp || IS_ERR(exp))
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goto out;
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/* Check if the request originated from a secure port. */
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error = nfserr_perm;
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if (!rqstp->rq_secure && EX_SECURE(exp)) {
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2007-02-12 01:53:32 -07:00
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char buf[RPC_MAX_ADDRBUFLEN];
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2005-04-16 16:20:36 -06:00
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printk(KERN_WARNING
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2007-02-12 01:53:32 -07:00
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"nfsd: request from insecure port %s!\n",
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svc_print_addr(rqstp, buf, sizeof(buf)));
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2005-04-16 16:20:36 -06:00
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goto out;
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}
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2006-07-30 04:03:16 -06:00
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/* Set user creds for this exportpoint */
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error = nfserrno(nfsd_setuser(rqstp, exp));
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if (error)
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goto out;
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2005-04-16 16:20:36 -06:00
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/*
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* Look up the dentry using the NFS file handle.
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*/
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error = nfserr_stale;
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if (rqstp->rq_vers > 2)
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error = nfserr_badhandle;
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if (fh->fh_version != 1) {
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tfh[0] = fh->ofh_ino;
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tfh[1] = fh->ofh_generation;
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tfh[2] = fh->ofh_dirino;
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datap = tfh;
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data_left = 3;
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if (fh->ofh_dirino == 0)
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fileid_type = 1;
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else
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fileid_type = 2;
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} else
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fileid_type = fh->fh_fileid_type;
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2007-02-14 01:33:11 -07:00
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2005-04-16 16:20:36 -06:00
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if (fileid_type == 0)
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dentry = dget(exp->ex_dentry);
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else {
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struct export_operations *nop = exp->ex_mnt->mnt_sb->s_export_op;
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dentry = CALL(nop,decode_fh)(exp->ex_mnt->mnt_sb,
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datap, data_left,
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fileid_type,
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nfsd_acceptable, exp);
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}
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if (dentry == NULL)
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goto out;
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if (IS_ERR(dentry)) {
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if (PTR_ERR(dentry) != -EINVAL)
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error = nfserrno(PTR_ERR(dentry));
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goto out;
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}
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2007-01-29 14:19:52 -07:00
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2005-04-16 16:20:36 -06:00
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if (S_ISDIR(dentry->d_inode->i_mode) &&
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(dentry->d_flags & DCACHE_DISCONNECTED)) {
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printk("nfsd: find_fh_dentry returned a DISCONNECTED directory: %s/%s\n",
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dentry->d_parent->d_name.name, dentry->d_name.name);
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}
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fhp->fh_dentry = dentry;
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fhp->fh_export = exp;
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nfsd_nr_verified++;
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} else {
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/* just rechecking permissions
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* (e.g. nfsproc_create calls fh_verify, then nfsd_create does as well)
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*/
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dprintk("nfsd: fh_verify - just checking\n");
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dentry = fhp->fh_dentry;
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exp = fhp->fh_export;
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2006-07-30 04:03:16 -06:00
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/* Set user creds for this exportpoint; necessary even
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* in the "just checking" case because this may be a
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* filehandle that was created by fh_compose, and that
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* is about to be used in another nfsv4 compound
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* operation */
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error = nfserrno(nfsd_setuser(rqstp, exp));
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if (error)
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goto out;
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2005-04-16 16:20:36 -06:00
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}
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cache_get(&exp->h);
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[PATCH] knfsd: nfsd: call nfsd_setuser() on fh_compose(), fix nfsd4 permissions problem
In the typical v2/v3 case the only new filehandles used as arguments to
operations are filehandles taken directly off the wire, which don't get
dentries until fh_verify() is called.
But in v4 the filehandles that are arguments to operations were often created
by previous operations (putrootfh, lookup, etc.) using fh_compose, which sets
the dentry in the filehandle without calling nfsd_setuser().
This also means that, for example, if filesystem B is mounted on filesystem A,
and filesystem A is exported without root-squashing, then a client can bypass
the rootsquashing on B using a compound that starts at a filehandle in A,
crosses into B using lookups, and then does stuff in B.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30 02:56:14 -06:00
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2005-04-16 16:20:36 -06:00
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error = nfsd_mode_check(rqstp, dentry->d_inode->i_mode, type);
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if (error)
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goto out;
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/* Finally, check access permissions. */
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error = nfsd_permission(exp, dentry, access);
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if (error) {
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2007-01-29 14:19:52 -07:00
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dprintk("fh_verify: %s/%s permission failure, "
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"acc=%x, error=%d\n",
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dentry->d_parent->d_name.name,
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dentry->d_name.name,
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2007-02-01 06:52:43 -07:00
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access, ntohl(error));
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2005-04-16 16:20:36 -06:00
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}
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out:
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if (exp && !IS_ERR(exp))
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exp_put(exp);
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if (error == nfserr_stale)
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nfsdstats.fh_stale++;
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return error;
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}
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/*
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* Compose a file handle for an NFS reply.
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*
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* Note that when first composed, the dentry may not yet have
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* an inode. In this case a call to fh_update should be made
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* before the fh goes out on the wire ...
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*/
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static inline int _fh_update(struct dentry *dentry, struct svc_export *exp,
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__u32 *datap, int *maxsize)
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{
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struct export_operations *nop = exp->ex_mnt->mnt_sb->s_export_op;
|
2007-02-14 01:33:11 -07:00
|
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|
2005-04-16 16:20:36 -06:00
|
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if (dentry == exp->ex_dentry) {
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*maxsize = 0;
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return 0;
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}
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return CALL(nop,encode_fh)(dentry, datap, maxsize,
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!(exp->ex_flags&NFSEXP_NOSUBTREECHECK));
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}
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/*
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* for composing old style file handles
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*/
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static inline void _fh_update_old(struct dentry *dentry,
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struct svc_export *exp,
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struct knfsd_fh *fh)
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{
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fh->ofh_ino = ino_t_to_u32(dentry->d_inode->i_ino);
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|
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fh->ofh_generation = dentry->d_inode->i_generation;
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|
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if (S_ISDIR(dentry->d_inode->i_mode) ||
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(exp->ex_flags & NFSEXP_NOSUBTREECHECK))
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|
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fh->ofh_dirino = 0;
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}
|
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|
|
|
2006-10-20 00:28:55 -06:00
|
|
|
__be32
|
2007-02-14 01:33:11 -07:00
|
|
|
fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
|
|
|
|
struct svc_fh *ref_fh)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
/* ref_fh is a reference file handle.
|
2006-06-30 02:56:12 -06:00
|
|
|
* if it is non-null and for the same filesystem, then we should compose
|
|
|
|
* a filehandle which is of the same version, where possible.
|
2005-04-16 16:20:36 -06:00
|
|
|
* Currently, that means that if ref_fh->fh_handle.fh_version == 0xca
|
|
|
|
* Then create a 32byte filehandle using nfs_fhbase_old
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2007-05-09 03:34:57 -06:00
|
|
|
u8 version;
|
2007-02-14 01:33:11 -07:00
|
|
|
u8 fsid_type = 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
struct inode * inode = dentry->d_inode;
|
|
|
|
struct dentry *parent = dentry->d_parent;
|
|
|
|
__u32 *datap;
|
|
|
|
dev_t ex_dev = exp->ex_dentry->d_inode->i_sb->s_dev;
|
2007-02-14 01:33:12 -07:00
|
|
|
int root_export = (exp->ex_dentry == exp->ex_dentry->d_sb->s_root);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
dprintk("nfsd: fh_compose(exp %02x:%02x/%ld %s/%s, ino=%ld)\n",
|
|
|
|
MAJOR(ex_dev), MINOR(ex_dev),
|
|
|
|
(long) exp->ex_dentry->d_inode->i_ino,
|
|
|
|
parent->d_name.name, dentry->d_name.name,
|
|
|
|
(inode ? inode->i_ino : 0));
|
|
|
|
|
2007-02-14 01:33:11 -07:00
|
|
|
/* Choose filehandle version and fsid type based on
|
|
|
|
* the reference filehandle (if it is in the same export)
|
|
|
|
* or the export options.
|
|
|
|
*/
|
2007-05-09 03:34:57 -06:00
|
|
|
retry:
|
|
|
|
version = 1;
|
2006-06-30 02:56:12 -06:00
|
|
|
if (ref_fh && ref_fh->fh_export == exp) {
|
2007-02-14 01:33:11 -07:00
|
|
|
version = ref_fh->fh_handle.fh_version;
|
2007-05-09 03:34:57 -06:00
|
|
|
fsid_type = ref_fh->fh_handle.fh_fsid_type;
|
|
|
|
|
|
|
|
if (ref_fh == fhp)
|
|
|
|
fh_put(ref_fh);
|
|
|
|
ref_fh = NULL;
|
|
|
|
|
|
|
|
switch (version) {
|
|
|
|
case 0xca:
|
2007-02-14 01:33:12 -07:00
|
|
|
fsid_type = FSID_DEV;
|
2007-05-09 03:34:57 -06:00
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
goto retry;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Need to check that this type works for this
|
|
|
|
* export point. As the fsid -> filesystem mapping
|
|
|
|
* was guided by user-space, there is no guarantee
|
|
|
|
* that the filesystem actually supports that fsid
|
|
|
|
* type. If it doesn't we loop around again without
|
|
|
|
* ref_fh set.
|
2007-02-14 01:33:11 -07:00
|
|
|
*/
|
2007-05-09 03:34:57 -06:00
|
|
|
switch(fsid_type) {
|
|
|
|
case FSID_DEV:
|
|
|
|
if (!old_valid_dev(ex_dev))
|
|
|
|
goto retry;
|
|
|
|
/* FALL THROUGH */
|
|
|
|
case FSID_MAJOR_MINOR:
|
|
|
|
case FSID_ENCODE_DEV:
|
|
|
|
if (!(exp->ex_dentry->d_inode->i_sb->s_type->fs_flags
|
|
|
|
& FS_REQUIRES_DEV))
|
|
|
|
goto retry;
|
|
|
|
break;
|
|
|
|
case FSID_NUM:
|
|
|
|
if (! (exp->ex_flags & NFSEXP_FSID))
|
|
|
|
goto retry;
|
|
|
|
break;
|
|
|
|
case FSID_UUID8:
|
|
|
|
case FSID_UUID16:
|
|
|
|
if (!root_export)
|
|
|
|
goto retry;
|
|
|
|
/* fall through */
|
|
|
|
case FSID_UUID4_INUM:
|
|
|
|
case FSID_UUID16_INUM:
|
|
|
|
if (exp->ex_uuid == NULL)
|
|
|
|
goto retry;
|
|
|
|
break;
|
|
|
|
}
|
2007-02-14 01:33:12 -07:00
|
|
|
} else if (exp->ex_uuid) {
|
|
|
|
if (fhp->fh_maxsize >= 64) {
|
|
|
|
if (root_export)
|
|
|
|
fsid_type = FSID_UUID16;
|
|
|
|
else
|
|
|
|
fsid_type = FSID_UUID16_INUM;
|
|
|
|
} else {
|
|
|
|
if (root_export)
|
|
|
|
fsid_type = FSID_UUID8;
|
|
|
|
else
|
|
|
|
fsid_type = FSID_UUID4_INUM;
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
} else if (exp->ex_flags & NFSEXP_FSID)
|
2007-02-14 01:33:12 -07:00
|
|
|
fsid_type = FSID_NUM;
|
2007-02-14 01:33:11 -07:00
|
|
|
else if (!old_valid_dev(ex_dev))
|
2005-04-16 16:20:36 -06:00
|
|
|
/* for newer device numbers, we must use a newer fsid format */
|
2007-02-14 01:33:12 -07:00
|
|
|
fsid_type = FSID_ENCODE_DEV;
|
2007-02-14 01:33:11 -07:00
|
|
|
else
|
2007-02-14 01:33:12 -07:00
|
|
|
fsid_type = FSID_DEV;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (ref_fh == fhp)
|
|
|
|
fh_put(ref_fh);
|
|
|
|
|
|
|
|
if (fhp->fh_locked || fhp->fh_dentry) {
|
|
|
|
printk(KERN_ERR "fh_compose: fh %s/%s not initialized!\n",
|
2007-02-14 01:33:11 -07:00
|
|
|
parent->d_name.name, dentry->d_name.name);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
if (fhp->fh_maxsize < NFS_FHSIZE)
|
|
|
|
printk(KERN_ERR "fh_compose: called with maxsize %d! %s/%s\n",
|
2007-02-14 01:33:11 -07:00
|
|
|
fhp->fh_maxsize,
|
|
|
|
parent->d_name.name, dentry->d_name.name);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
fhp->fh_dentry = dget(dentry); /* our internal copy */
|
|
|
|
fhp->fh_export = exp;
|
|
|
|
cache_get(&exp->h);
|
|
|
|
|
2007-02-14 01:33:11 -07:00
|
|
|
if (version == 0xca) {
|
2005-04-16 16:20:36 -06:00
|
|
|
/* old style filehandle please */
|
|
|
|
memset(&fhp->fh_handle.fh_base, 0, NFS_FHSIZE);
|
|
|
|
fhp->fh_handle.fh_size = NFS_FHSIZE;
|
|
|
|
fhp->fh_handle.ofh_dcookie = 0xfeebbaca;
|
|
|
|
fhp->fh_handle.ofh_dev = old_encode_dev(ex_dev);
|
|
|
|
fhp->fh_handle.ofh_xdev = fhp->fh_handle.ofh_dev;
|
2007-02-14 01:33:11 -07:00
|
|
|
fhp->fh_handle.ofh_xino =
|
|
|
|
ino_t_to_u32(exp->ex_dentry->d_inode->i_ino);
|
2005-04-16 16:20:36 -06:00
|
|
|
fhp->fh_handle.ofh_dirino = ino_t_to_u32(parent_ino(dentry));
|
|
|
|
if (inode)
|
|
|
|
_fh_update_old(dentry, exp, &fhp->fh_handle);
|
|
|
|
} else {
|
|
|
|
int len;
|
|
|
|
fhp->fh_handle.fh_version = 1;
|
|
|
|
fhp->fh_handle.fh_auth_type = 0;
|
|
|
|
datap = fhp->fh_handle.fh_auth+0;
|
2007-02-14 01:33:11 -07:00
|
|
|
fhp->fh_handle.fh_fsid_type = fsid_type;
|
2007-02-14 01:33:12 -07:00
|
|
|
mk_fsid(fsid_type, datap, ex_dev,
|
|
|
|
exp->ex_dentry->d_inode->i_ino,
|
|
|
|
exp->ex_fsid, exp->ex_uuid);
|
|
|
|
|
2007-02-14 01:33:11 -07:00
|
|
|
len = key_len(fsid_type);
|
2005-04-16 16:20:36 -06:00
|
|
|
datap += len/4;
|
|
|
|
fhp->fh_handle.fh_size = 4 + len;
|
|
|
|
|
|
|
|
if (inode) {
|
|
|
|
int size = (fhp->fh_maxsize-len-4)/4;
|
|
|
|
fhp->fh_handle.fh_fileid_type =
|
|
|
|
_fh_update(dentry, exp, datap, &size);
|
|
|
|
fhp->fh_handle.fh_size += size*4;
|
|
|
|
}
|
|
|
|
if (fhp->fh_handle.fh_fileid_type == 255)
|
|
|
|
return nfserr_opnotsupp;
|
|
|
|
}
|
|
|
|
|
|
|
|
nfsd_nr_verified++;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Update file handle information after changing a dentry.
|
|
|
|
* This is only called by nfsd_create, nfsd_create_v3 and nfsd_proc_create
|
|
|
|
*/
|
2006-10-20 00:28:55 -06:00
|
|
|
__be32
|
2005-04-16 16:20:36 -06:00
|
|
|
fh_update(struct svc_fh *fhp)
|
|
|
|
{
|
|
|
|
struct dentry *dentry;
|
|
|
|
__u32 *datap;
|
2007-02-14 01:33:11 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!fhp->fh_dentry)
|
|
|
|
goto out_bad;
|
|
|
|
|
|
|
|
dentry = fhp->fh_dentry;
|
|
|
|
if (!dentry->d_inode)
|
|
|
|
goto out_negative;
|
|
|
|
if (fhp->fh_handle.fh_version != 1) {
|
|
|
|
_fh_update_old(dentry, fhp->fh_export, &fhp->fh_handle);
|
|
|
|
} else {
|
|
|
|
int size;
|
|
|
|
if (fhp->fh_handle.fh_fileid_type != 0)
|
2006-06-30 02:56:11 -06:00
|
|
|
goto out;
|
2005-04-16 16:20:36 -06:00
|
|
|
datap = fhp->fh_handle.fh_auth+
|
|
|
|
fhp->fh_handle.fh_size/4 -1;
|
|
|
|
size = (fhp->fh_maxsize - fhp->fh_handle.fh_size)/4;
|
|
|
|
fhp->fh_handle.fh_fileid_type =
|
|
|
|
_fh_update(dentry, fhp->fh_export, datap, &size);
|
|
|
|
fhp->fh_handle.fh_size += size*4;
|
|
|
|
if (fhp->fh_handle.fh_fileid_type == 255)
|
|
|
|
return nfserr_opnotsupp;
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_bad:
|
|
|
|
printk(KERN_ERR "fh_update: fh not verified!\n");
|
|
|
|
goto out;
|
|
|
|
out_negative:
|
|
|
|
printk(KERN_ERR "fh_update: %s/%s still negative!\n",
|
|
|
|
dentry->d_parent->d_name.name, dentry->d_name.name);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Release a file handle.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
fh_put(struct svc_fh *fhp)
|
|
|
|
{
|
|
|
|
struct dentry * dentry = fhp->fh_dentry;
|
|
|
|
struct svc_export * exp = fhp->fh_export;
|
|
|
|
if (dentry) {
|
|
|
|
fh_unlock(fhp);
|
|
|
|
fhp->fh_dentry = NULL;
|
|
|
|
dput(dentry);
|
|
|
|
#ifdef CONFIG_NFSD_V3
|
|
|
|
fhp->fh_pre_saved = 0;
|
|
|
|
fhp->fh_post_saved = 0;
|
|
|
|
#endif
|
|
|
|
nfsd_nr_put++;
|
|
|
|
}
|
|
|
|
if (exp) {
|
2006-03-27 02:15:09 -07:00
|
|
|
cache_put(&exp->h, &svc_export_cache);
|
2005-04-16 16:20:36 -06:00
|
|
|
fhp->fh_export = NULL;
|
|
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Shorthand for dprintk()'s
|
|
|
|
*/
|
|
|
|
char * SVCFH_fmt(struct svc_fh *fhp)
|
|
|
|
{
|
|
|
|
struct knfsd_fh *fh = &fhp->fh_handle;
|
|
|
|
|
|
|
|
static char buf[80];
|
|
|
|
sprintf(buf, "%d: %08x %08x %08x %08x %08x %08x",
|
|
|
|
fh->fh_size,
|
|
|
|
fh->fh_base.fh_pad[0],
|
|
|
|
fh->fh_base.fh_pad[1],
|
|
|
|
fh->fh_base.fh_pad[2],
|
|
|
|
fh->fh_base.fh_pad[3],
|
|
|
|
fh->fh_base.fh_pad[4],
|
|
|
|
fh->fh_base.fh_pad[5]);
|
|
|
|
return buf;
|
|
|
|
}
|
2007-02-14 01:33:12 -07:00
|
|
|
|
|
|
|
enum fsid_source fsid_source(struct svc_fh *fhp)
|
|
|
|
{
|
|
|
|
if (fhp->fh_handle.fh_version != 1)
|
|
|
|
return FSIDSOURCE_DEV;
|
|
|
|
switch(fhp->fh_handle.fh_fsid_type) {
|
|
|
|
case FSID_DEV:
|
|
|
|
case FSID_ENCODE_DEV:
|
|
|
|
case FSID_MAJOR_MINOR:
|
|
|
|
return FSIDSOURCE_DEV;
|
|
|
|
case FSID_NUM:
|
|
|
|
return FSIDSOURCE_FSID;
|
|
|
|
default:
|
|
|
|
if (fhp->fh_export->ex_flags & NFSEXP_FSID)
|
|
|
|
return FSIDSOURCE_FSID;
|
|
|
|
else
|
|
|
|
return FSIDSOURCE_UUID;
|
|
|
|
}
|
|
|
|
}
|