* Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de>
*/
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/stat.h>
-#include <linux/in.h>
-#include <linux/seq_file.h>
-#include <linux/syscalls.h>
-#include <linux/rwsem.h>
-#include <linux/dcache.h>
#include <linux/namei.h>
-#include <linux/mount.h>
-#include <linux/hash.h>
#include <linux/module.h>
#include <linux/exportfs.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/nfsfh.h>
#include <linux/nfsd/syscall.h>
-#include <linux/lockd/bind.h>
-#include <linux/sunrpc/msg_prot.h>
-#include <linux/sunrpc/gss_api.h>
#include <net/ipv6.h>
+#include "nfsd.h"
+#include "nfsfh.h"
+
#define NFSDDBG_FACILITY NFSDDBG_EXPORT
typedef struct auth_domain svc_client;
(*bpp)[-1] = '\n';
}
+static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
+{
+ return sunrpc_cache_pipe_upcall(cd, h, expkey_request);
+}
+
static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old);
static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *);
static struct cache_detail svc_expkey_cache;
.hash_table = expkey_table,
.name = "nfsd.fh",
.cache_put = expkey_put,
- .cache_request = expkey_request,
+ .cache_upcall = expkey_upcall,
.cache_parse = expkey_parse,
.cache_show = expkey_show,
.match = expkey_match,
(*bpp)[-1] = '\n';
}
+static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
+{
+ return sunrpc_cache_pipe_upcall(cd, h, svc_export_request);
+}
+
static struct svc_export *svc_export_update(struct svc_export *new,
struct svc_export *old);
static struct svc_export *svc_export_lookup(struct svc_export *);
-static int check_export(struct inode *inode, int flags, unsigned char *uuid)
+static int check_export(struct inode *inode, int *flags, unsigned char *uuid)
{
- /* We currently export only dirs and regular files.
- * This is what umountd does.
+ /*
+ * We currently export only dirs, regular files, and (for v4
+ * pseudoroot) symlinks.
*/
if (!S_ISDIR(inode->i_mode) &&
+ !S_ISLNK(inode->i_mode) &&
!S_ISREG(inode->i_mode))
return -ENOTDIR;
+ /*
+ * Mountd should never pass down a writeable V4ROOT export, but,
+ * just to make sure:
+ */
+ if (*flags & NFSEXP_V4ROOT)
+ *flags |= NFSEXP_READONLY;
+
/* There are two requirements on a filesystem to be exportable.
* 1: We must be able to identify the filesystem from a number.
* either a device number (so FS_REQUIRES_DEV needed)
* This means that s_export_op must be set.
*/
if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) &&
- !(flags & NFSEXP_FSID) &&
+ !(*flags & NFSEXP_FSID) &&
uuid == NULL) {
dprintk("exp_export: export of non-dev fs without fsid\n");
return -EINVAL;
goto out4;
}
- err = check_export(exp.ex_path.dentry->d_inode, exp.ex_flags,
+ err = check_export(exp.ex_path.dentry->d_inode, &exp.ex_flags,
exp.ex_uuid);
if (err)
goto out4;
.hash_table = export_table,
.name = "nfsd.export",
.cache_put = svc_export_put,
- .cache_request = svc_export_request,
+ .cache_upcall = svc_export_upcall,
.cache_parse = svc_export_parse,
.cache_show = svc_export_show,
.match = svc_export_match,
return exp_find_key(clp, FSID_NUM, fsidv, NULL);
}
-static svc_export *exp_get_by_name(svc_client *clp, struct vfsmount *mnt,
- struct dentry *dentry,
- struct cache_req *reqp)
+static svc_export *exp_get_by_name(svc_client *clp, const struct path *path,
+ struct cache_req *reqp)
{
struct svc_export *exp, key;
int err;
return ERR_PTR(-ENOENT);
key.ex_client = clp;
- key.ex_path.mnt = mnt;
- key.ex_path.dentry = dentry;
+ key.ex_path = *path;
exp = svc_export_lookup(&key);
if (exp == NULL)
/*
* Find the export entry for a given dentry.
*/
-static struct svc_export *exp_parent(svc_client *clp, struct vfsmount *mnt,
- struct dentry *dentry,
- struct cache_req *reqp)
+static struct svc_export *exp_parent(svc_client *clp, struct path *path)
{
- svc_export *exp;
-
- dget(dentry);
- exp = exp_get_by_name(clp, mnt, dentry, reqp);
-
- while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {
- struct dentry *parent;
-
- parent = dget_parent(dentry);
- dput(dentry);
- dentry = parent;
- exp = exp_get_by_name(clp, mnt, dentry, reqp);
+ struct dentry *saved = dget(path->dentry);
+ svc_export *exp = exp_get_by_name(clp, path, NULL);
+
+ while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) {
+ struct dentry *parent = dget_parent(path->dentry);
+ dput(path->dentry);
+ path->dentry = parent;
+ exp = exp_get_by_name(clp, path, NULL);
}
- dput(dentry);
+ dput(path->dentry);
+ path->dentry = saved;
return exp;
}
goto out_put_clp;
err = -EINVAL;
- exp = exp_get_by_name(clp, path.mnt, path.dentry, NULL);
+ exp = exp_get_by_name(clp, &path, NULL);
memset(&new, 0, sizeof(new));
goto finish;
}
- err = check_export(path.dentry->d_inode, nxp->ex_flags, NULL);
+ err = check_export(path.dentry->d_inode, &nxp->ex_flags, NULL);
if (err) goto finish;
err = -ENOMEM;
goto out_domain;
err = -EINVAL;
- exp = exp_get_by_name(dom, path.mnt, path.dentry, NULL);
+ exp = exp_get_by_name(dom, &path, NULL);
path_put(&path);
if (IS_ERR(exp))
goto out_domain;
dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
name, path.dentry, clp->name,
inode->i_sb->s_id, inode->i_ino);
- exp = exp_parent(clp, path.mnt, path.dentry, NULL);
+ exp = exp_parent(clp, &path);
if (IS_ERR(exp)) {
err = PTR_ERR(exp);
goto out;
if (IS_ERR(ek))
return ERR_CAST(ek);
- exp = exp_get_by_name(clp, ek->ek_path.mnt, ek->ek_path.dentry, reqp);
+ exp = exp_get_by_name(clp, &ek->ek_path, reqp);
cache_put(&ek->h, &svc_expkey_cache);
if (IS_ERR(exp))
* use exp_get_by_name() or exp_find().
*/
struct svc_export *
-rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
- struct dentry *dentry)
+rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path)
{
struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
goto gss;
/* First try the auth_unix client: */
- exp = exp_get_by_name(rqstp->rq_client, mnt, dentry,
- &rqstp->rq_chandle);
+ exp = exp_get_by_name(rqstp->rq_client, path, &rqstp->rq_chandle);
if (PTR_ERR(exp) == -ENOENT)
goto gss;
if (IS_ERR(exp))
/* Otherwise, try falling back on gss client */
if (rqstp->rq_gssclient == NULL)
return exp;
- gssexp = exp_get_by_name(rqstp->rq_gssclient, mnt, dentry,
- &rqstp->rq_chandle);
+ gssexp = exp_get_by_name(rqstp->rq_gssclient, path, &rqstp->rq_chandle);
if (PTR_ERR(gssexp) == -ENOENT)
return exp;
if (!IS_ERR(exp))
}
struct svc_export *
-rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt,
- struct dentry *dentry)
+rqst_exp_parent(struct svc_rqst *rqstp, struct path *path)
{
- struct svc_export *exp;
+ struct dentry *saved = dget(path->dentry);
+ struct svc_export *exp = rqst_exp_get_by_name(rqstp, path);
+
+ while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) {
+ struct dentry *parent = dget_parent(path->dentry);
+ dput(path->dentry);
+ path->dentry = parent;
+ exp = rqst_exp_get_by_name(rqstp, path);
+ }
+ dput(path->dentry);
+ path->dentry = saved;
+ return exp;
+}
- dget(dentry);
- exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
+static struct svc_export *find_fsidzero_export(struct svc_rqst *rqstp)
+{
+ struct svc_export *exp;
+ u32 fsidv[2];
- while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {
- struct dentry *parent;
+ mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL);
- parent = dget_parent(dentry);
- dput(dentry);
- dentry = parent;
- exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
- }
- dput(dentry);
+ exp = rqst_exp_find(rqstp, FSID_NUM, fsidv);
+ /*
+ * We shouldn't have accepting an nfsv4 request at all if we
+ * don't have a pseudoexport!:
+ */
+ if (IS_ERR(exp) && PTR_ERR(exp) == -ENOENT)
+ exp = ERR_PTR(-ESERVERFAULT);
return exp;
}
{
struct svc_export *exp;
__be32 rv;
- u32 fsidv[2];
- mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL);
-
- exp = rqst_exp_find(rqstp, FSID_NUM, fsidv);
+ exp = find_fsidzero_export(rqstp);
if (IS_ERR(exp))
return nfserrno(PTR_ERR(exp));
rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL);
if (rv)
goto out;
rv = check_nfsd_access(exp, rqstp);
+ if (rv)
+ fh_put(fhp);
out:
exp_put(exp);
return rv;
{ NFSEXP_CROSSMOUNT, {"crossmnt", ""}},
{ NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}},
{ NFSEXP_NOAUTHNLM, {"insecure_locks", ""}},
+ { NFSEXP_V4ROOT, {"v4root", ""}},
#ifdef MSNFS
{ NFSEXP_MSNFS, {"msnfs", ""}},
#endif
return svc_export_show(m, &svc_export_cache, cp);
}
-struct seq_operations nfs_exports_op = {
+const struct seq_operations nfs_exports_op = {
.start = e_start,
.next = e_next,
.stop = e_stop,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff