* 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;
int fsidtype;
char *ep;
struct svc_expkey key;
- struct svc_expkey *ek;
+ struct svc_expkey *ek = NULL;
if (mesg[mlen-1] != '\n')
return -EINVAL;
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
err = -ENOMEM;
- if (!buf) goto out;
+ if (!buf)
+ goto out;
err = -EINVAL;
if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
/* now we want a pathname, or empty meaning NEGATIVE */
err = -EINVAL;
- if ((len=qword_get(&mesg, buf, PAGE_SIZE)) < 0) {
- cache_put(&ek->h, &svc_expkey_cache);
+ len = qword_get(&mesg, buf, PAGE_SIZE);
+ if (len < 0)
goto out;
- }
dprintk("Path seems to be <%s>\n", buf);
err = 0;
if (len == 0) {
set_bit(CACHE_NEGATIVE, &key.h.flags);
ek = svc_expkey_update(&key, ek);
- if (ek)
- cache_put(&ek->h, &svc_expkey_cache);
- else err = -ENOMEM;
+ if (!ek)
+ err = -ENOMEM;
} else {
- struct nameidata nd;
- err = path_lookup(buf, 0, &nd);
- if (err) {
- cache_put(&ek->h, &svc_expkey_cache);
+ err = kern_path(buf, 0, &key.ek_path);
+ if (err)
goto out;
- }
dprintk("Found the path %s\n", buf);
- key.ek_path = nd.path;
ek = svc_expkey_update(&key, ek);
- if (ek)
- cache_put(&ek->h, &svc_expkey_cache);
- else
+ if (!ek)
err = -ENOMEM;
- path_put(&nd.path);
+ path_put(&key.ek_path);
}
cache_flush();
out:
+ if (ek)
+ cache_put(&ek->h, &svc_expkey_cache);
if (dom)
auth_domain_put(dom);
kfree(buf);
.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;
if (err)
return err;
/*
- * Just a quick sanity check; we could also try to check
- * whether this pseudoflavor is supported, but at worst
- * an unsupported pseudoflavor on the export would just
- * be a pseudoflavor that won't match the flavor of any
- * authenticated request. The administrator will
- * probably discover the problem when someone fails to
- * authenticate.
+ * XXX: It would be nice to also check whether this
+ * pseudoflavor is supported, so we can discover the
+ * problem at export time instead of when a client fails
+ * to authenticate.
*/
- if (f->pseudoflavor < 0)
- return -EINVAL;
err = get_int(mesg, &f->flags);
if (err)
return err;
int len;
int err;
struct auth_domain *dom = NULL;
- struct nameidata nd;
- struct svc_export exp, *expp;
+ struct svc_export exp = {}, *expp;
int an_int;
- nd.path.dentry = NULL;
- exp.ex_pathname = NULL;
-
- /* fs locations */
- exp.ex_fslocs.locations = NULL;
- exp.ex_fslocs.locations_count = 0;
- exp.ex_fslocs.migrated = 0;
-
- exp.ex_uuid = NULL;
-
- /* secinfo */
- exp.ex_nflavors = 0;
-
if (mesg[mlen-1] != '\n')
return -EINVAL;
mesg[mlen-1] = 0;
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
- err = -ENOMEM;
- if (!buf) goto out;
+ if (!buf)
+ return -ENOMEM;
/* client */
- len = qword_get(&mesg, buf, PAGE_SIZE);
err = -EINVAL;
- if (len <= 0) goto out;
+ len = qword_get(&mesg, buf, PAGE_SIZE);
+ if (len <= 0)
+ goto out;
err = -ENOENT;
dom = auth_domain_find(buf);
/* path */
err = -EINVAL;
- if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
- goto out;
- err = path_lookup(buf, 0, &nd);
- if (err) goto out_no_path;
+ if ((len = qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
+ goto out1;
+
+ err = kern_path(buf, 0, &exp.ex_path);
+ if (err)
+ goto out1;
- exp.h.flags = 0;
exp.ex_client = dom;
- exp.ex_path.mnt = nd.path.mnt;
- exp.ex_path.dentry = nd.path.dentry;
- exp.ex_pathname = kstrdup(buf, GFP_KERNEL);
+
err = -ENOMEM;
+ exp.ex_pathname = kstrdup(buf, GFP_KERNEL);
if (!exp.ex_pathname)
- goto out;
+ goto out2;
/* expiry */
err = -EINVAL;
exp.h.expiry_time = get_expiry(&mesg);
if (exp.h.expiry_time == 0)
- goto out;
+ goto out3;
/* flags */
err = get_int(&mesg, &an_int);
err = 0;
set_bit(CACHE_NEGATIVE, &exp.h.flags);
} else {
- if (err || an_int < 0) goto out;
+ if (err || an_int < 0)
+ goto out3;
exp.ex_flags= an_int;
/* anon uid */
err = get_int(&mesg, &an_int);
- if (err) goto out;
+ if (err)
+ goto out3;
exp.ex_anon_uid= an_int;
/* anon gid */
err = get_int(&mesg, &an_int);
- if (err) goto out;
+ if (err)
+ goto out3;
exp.ex_anon_gid= an_int;
/* fsid */
err = get_int(&mesg, &an_int);
- if (err) goto out;
+ if (err)
+ goto out3;
exp.ex_fsid = an_int;
while ((len = qword_get(&mesg, buf, PAGE_SIZE)) > 0) {
*/
break;
if (err)
- goto out;
+ goto out4;
}
- err = check_export(nd.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 out;
+ if (err)
+ goto out4;
}
expp = svc_export_lookup(&exp);
err = -ENOMEM;
else
exp_put(expp);
- out:
+out4:
nfsd4_fslocs_free(&exp.ex_fslocs);
kfree(exp.ex_uuid);
+out3:
kfree(exp.ex_pathname);
- if (nd.path.dentry)
- path_put(&nd.path);
- out_no_path:
- if (dom)
- auth_domain_put(dom);
+out2:
+ path_put(&exp.ex_path);
+out1:
+ auth_domain_put(dom);
+out:
kfree(buf);
return err;
}
.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;
}
struct svc_export *exp = NULL;
struct svc_export new;
struct svc_expkey *fsid_key = NULL;
- struct nameidata nd;
+ struct path path;
int err;
/* Consistency check */
/* Look up the dentry */
- err = path_lookup(nxp->ex_path, 0, &nd);
+ err = kern_path(nxp->ex_path, 0, &path);
if (err)
goto out_put_clp;
err = -EINVAL;
- exp = exp_get_by_name(clp, nd.path.mnt, nd.path.dentry, NULL);
+ exp = exp_get_by_name(clp, &path, NULL);
memset(&new, 0, sizeof(new));
if ((nxp->ex_flags & NFSEXP_FSID) &&
(!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) &&
fsid_key->ek_path.mnt &&
- (fsid_key->ek_path.mnt != nd.path.mnt ||
- fsid_key->ek_path.dentry != nd.path.dentry))
+ (fsid_key->ek_path.mnt != path.mnt ||
+ fsid_key->ek_path.dentry != path.dentry))
goto finish;
if (!IS_ERR(exp)) {
goto finish;
}
- err = check_export(nd.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;
if (!new.ex_pathname)
goto finish;
new.ex_client = clp;
- new.ex_path = nd.path;
+ new.ex_path = path;
new.ex_flags = nxp->ex_flags;
new.ex_anon_uid = nxp->ex_anon_uid;
new.ex_anon_gid = nxp->ex_anon_gid;
exp_put(exp);
if (fsid_key && !IS_ERR(fsid_key))
cache_put(&fsid_key->h, &svc_expkey_cache);
- path_put(&nd.path);
+ path_put(&path);
out_put_clp:
auth_domain_put(clp);
out_unlock:
{
struct auth_domain *dom;
svc_export *exp;
- struct nameidata nd;
+ struct path path;
int err;
/* Consistency check */
goto out_unlock;
}
- err = path_lookup(nxp->ex_path, 0, &nd);
+ err = kern_path(nxp->ex_path, 0, &path);
if (err)
goto out_domain;
err = -EINVAL;
- exp = exp_get_by_name(dom, nd.path.mnt, nd.path.dentry, NULL);
- path_put(&nd.path);
+ exp = exp_get_by_name(dom, &path, NULL);
+ path_put(&path);
if (IS_ERR(exp))
goto out_domain;
* since its harder to fool a kernel module than a user space program.
*/
int
-exp_rootfh(svc_client *clp, char *path, struct knfsd_fh *f, int maxsize)
+exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize)
{
struct svc_export *exp;
- struct nameidata nd;
+ struct path path;
struct inode *inode;
struct svc_fh fh;
int err;
err = -EPERM;
/* NB: we probably ought to check that it's NUL-terminated */
- if (path_lookup(path, 0, &nd)) {
- printk("nfsd: exp_rootfh path not found %s", path);
+ if (kern_path(name, 0, &path)) {
+ printk("nfsd: exp_rootfh path not found %s", name);
return err;
}
- inode = nd.path.dentry->d_inode;
+ inode = path.dentry->d_inode;
dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
- path, nd.path.dentry, clp->name,
+ name, path.dentry, clp->name,
inode->i_sb->s_id, inode->i_ino);
- exp = exp_parent(clp, nd.path.mnt, nd.path.dentry, NULL);
+ exp = exp_parent(clp, &path);
if (IS_ERR(exp)) {
err = PTR_ERR(exp);
goto out;
* fh must be initialized before calling fh_compose
*/
fh_init(&fh, maxsize);
- if (fh_compose(&fh, exp, nd.path.dentry, NULL))
+ if (fh_compose(&fh, exp, path.dentry, NULL))
err = -EINVAL;
else
err = 0;
fh_put(&fh);
exp_put(exp);
out:
- path_put(&nd.path);
+ path_put(&path);
return err;
}
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