* Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de>
*/
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/sched.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 <net/ipv6.h>
+
+#include "nfsd.h"
+#include "nfsfh.h"
#define NFSDDBG_FACILITY NFSDDBG_EXPORT
-#define NFSD_PARANOIA 1
typedef struct auth_domain svc_client;
typedef struct svc_export svc_export;
struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref);
if (test_bit(CACHE_VALID, &key->h.flags) &&
- !test_bit(CACHE_NEGATIVE, &key->h.flags)) {
- dput(key->ek_dentry);
- mntput(key->ek_mnt);
- }
+ !test_bit(CACHE_NEGATIVE, &key->h.flags))
+ path_put(&key->ek_path);
auth_domain_put(key->ek_client);
kfree(key);
}
(*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)
if (*ep)
goto out;
dprintk("found fsidtype %d\n", fsidtype);
- if (fsidtype > 2)
+ if (key_len(fsidtype)==0) /* invalid type */
goto out;
if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
goto out;
/* now we want a pathname, or empty meaning NEGATIVE */
err = -EINVAL;
- if ((len=qword_get(&mesg, buf, PAGE_SIZE)) < 0)
+ 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);
+ err = kern_path(buf, 0, &key.ek_path);
if (err)
goto out;
dprintk("Found the path %s\n", buf);
- key.ek_mnt = nd.mnt;
- key.ek_dentry = nd.dentry;
-
+
ek = svc_expkey_update(&key, ek);
- if (ek)
- cache_put(&ek->h, &svc_expkey_cache);
- else
+ if (!ek)
err = -ENOMEM;
- path_release(&nd);
+ 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);
struct cache_head *h)
{
struct svc_expkey *ek ;
+ int i;
if (h ==NULL) {
seq_puts(m, "#domain fsidtype fsid [path]\n");
return 0;
}
ek = container_of(h, struct svc_expkey, h);
- seq_printf(m, "%s %d 0x%08x", ek->ek_client->name,
- ek->ek_fsidtype, ek->ek_fsid[0]);
- if (ek->ek_fsidtype != 1)
- seq_printf(m, "%08x", ek->ek_fsid[1]);
- if (ek->ek_fsidtype == 2)
- seq_printf(m, "%08x", ek->ek_fsid[2]);
+ seq_printf(m, "%s %d 0x", ek->ek_client->name,
+ ek->ek_fsidtype);
+ for (i=0; i < key_len(ek->ek_fsidtype)/4; i++)
+ seq_printf(m, "%08x", ek->ek_fsid[i]);
if (test_bit(CACHE_VALID, &h->flags) &&
!test_bit(CACHE_NEGATIVE, &h->flags)) {
seq_printf(m, " ");
- seq_path(m, ek->ek_mnt, ek->ek_dentry, "\\ \t\n");
+ seq_path(m, &ek->ek_path, "\\ \t\n");
}
seq_printf(m, "\n");
return 0;
kref_get(&item->ek_client->ref);
new->ek_client = item->ek_client;
new->ek_fsidtype = item->ek_fsidtype;
- new->ek_fsid[0] = item->ek_fsid[0];
- new->ek_fsid[1] = item->ek_fsid[1];
- new->ek_fsid[2] = item->ek_fsid[2];
+
+ memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid));
}
static inline void expkey_update(struct cache_head *cnew,
struct svc_expkey *new = container_of(cnew, struct svc_expkey, h);
struct svc_expkey *item = container_of(citem, struct svc_expkey, h);
- new->ek_mnt = mntget(item->ek_mnt);
- new->ek_dentry = dget(item->ek_dentry);
+ new->ek_path = item->ek_path;
+ path_get(&item->ek_path);
}
static struct cache_head *expkey_alloc(void)
.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,
static struct cache_head *export_table[EXPORT_HASHMAX];
+static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc)
+{
+ int i;
+
+ for (i = 0; i < fsloc->locations_count; i++) {
+ kfree(fsloc->locations[i].path);
+ kfree(fsloc->locations[i].hosts);
+ }
+ kfree(fsloc->locations);
+}
+
static void svc_export_put(struct kref *ref)
{
struct svc_export *exp = container_of(ref, struct svc_export, h.ref);
- dput(exp->ex_dentry);
- mntput(exp->ex_mnt);
+ path_put(&exp->ex_path);
auth_domain_put(exp->ex_client);
+ kfree(exp->ex_pathname);
+ nfsd4_fslocs_free(&exp->ex_fslocs);
kfree(exp);
}
char *pth;
qword_add(bpp, blen, exp->ex_client->name);
- pth = d_path(exp->ex_dentry, exp->ex_mnt, *bpp, *blen);
+ pth = d_path(&exp->ex_path, *bpp, *blen);
if (IS_ERR(pth)) {
/* is this correct? */
(*bpp)[0] = '\n';
(*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)
+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)
- * or an FSID number (so NFSEXP_FSID needed).
+ * or an FSID number (so NFSEXP_FSID or ->uuid is needed).
* 2: We must be able to find an inode from a filehandle.
* This means that s_export_op must be set.
*/
if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) &&
- !(flags & NFSEXP_FSID)) {
- dprintk("exp_export: export of non-dev fs without fsid");
+ !(*flags & NFSEXP_FSID) &&
+ uuid == NULL) {
+ dprintk("exp_export: export of non-dev fs without fsid\n");
return -EINVAL;
}
- if (!inode->i_sb->s_export_op) {
+
+ if (!inode->i_sb->s_export_op ||
+ !inode->i_sb->s_export_op->fh_to_dentry) {
dprintk("exp_export: export of invalid fs type.\n");
return -EINVAL;
}
- /* Ok, we can export it */;
- if (!inode->i_sb->s_export_op->find_exported_dentry)
- inode->i_sb->s_export_op->find_exported_dentry =
- find_exported_dentry;
return 0;
}
+#ifdef CONFIG_NFSD_V4
+
+static int
+fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc)
+{
+ int len;
+ int migrated, i, err;
+
+ /* listsize */
+ err = get_int(mesg, &fsloc->locations_count);
+ if (err)
+ return err;
+ if (fsloc->locations_count > MAX_FS_LOCATIONS)
+ return -EINVAL;
+ if (fsloc->locations_count == 0)
+ return 0;
+
+ fsloc->locations = kzalloc(fsloc->locations_count
+ * sizeof(struct nfsd4_fs_location), GFP_KERNEL);
+ if (!fsloc->locations)
+ return -ENOMEM;
+ for (i=0; i < fsloc->locations_count; i++) {
+ /* colon separated host list */
+ err = -EINVAL;
+ len = qword_get(mesg, buf, PAGE_SIZE);
+ if (len <= 0)
+ goto out_free_all;
+ err = -ENOMEM;
+ fsloc->locations[i].hosts = kstrdup(buf, GFP_KERNEL);
+ if (!fsloc->locations[i].hosts)
+ goto out_free_all;
+ err = -EINVAL;
+ /* slash separated path component list */
+ len = qword_get(mesg, buf, PAGE_SIZE);
+ if (len <= 0)
+ goto out_free_all;
+ err = -ENOMEM;
+ fsloc->locations[i].path = kstrdup(buf, GFP_KERNEL);
+ if (!fsloc->locations[i].path)
+ goto out_free_all;
+ }
+ /* migrated */
+ err = get_int(mesg, &migrated);
+ if (err)
+ goto out_free_all;
+ err = -EINVAL;
+ if (migrated < 0 || migrated > 1)
+ goto out_free_all;
+ fsloc->migrated = migrated;
+ return 0;
+out_free_all:
+ nfsd4_fslocs_free(fsloc);
+ return err;
+}
+
+static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp)
+{
+ int listsize, err;
+ struct exp_flavor_info *f;
+
+ err = get_int(mesg, &listsize);
+ if (err)
+ return err;
+ if (listsize < 0 || listsize > MAX_SECINFO_LIST)
+ return -EINVAL;
+
+ for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) {
+ err = get_int(mesg, &f->pseudoflavor);
+ if (err)
+ return err;
+ /*
+ * 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.
+ */
+ err = get_int(mesg, &f->flags);
+ if (err)
+ return err;
+ /* Only some flags are allowed to differ between flavors: */
+ if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags))
+ return -EINVAL;
+ }
+ exp->ex_nflavors = listsize;
+ return 0;
+}
+
+#else /* CONFIG_NFSD_V4 */
+static inline int
+fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;}
+static inline int
+secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; }
+#endif
+
static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
{
/* client path expiry [flags anonuid anongid fsid] */
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.dentry = NULL;
-
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;
+ 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_mnt = nd.mnt;
- exp.ex_dentry = nd.dentry;
+
+ err = -ENOMEM;
+ exp.ex_pathname = kstrdup(buf, GFP_KERNEL);
+ if (!exp.ex_pathname)
+ 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);
- if (err == -ENOENT)
+ if (err == -ENOENT) {
+ err = 0;
set_bit(CACHE_NEGATIVE, &exp.h.flags);
- else {
- if (err || an_int < 0) goto out;
+ } else {
+ 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;
- err = check_export(nd.dentry->d_inode, exp.ex_flags);
- if (err) goto out;
+ while ((len = qword_get(&mesg, buf, PAGE_SIZE)) > 0) {
+ if (strcmp(buf, "fsloc") == 0)
+ err = fsloc_parse(&mesg, buf, &exp.ex_fslocs);
+ else if (strcmp(buf, "uuid") == 0) {
+ /* expect a 16 byte uuid encoded as \xXXXX... */
+ len = qword_get(&mesg, buf, PAGE_SIZE);
+ if (len != 16)
+ err = -EINVAL;
+ else {
+ exp.ex_uuid =
+ kmemdup(buf, 16, GFP_KERNEL);
+ if (exp.ex_uuid == NULL)
+ err = -ENOMEM;
+ }
+ } else if (strcmp(buf, "secinfo") == 0)
+ err = secinfo_parse(&mesg, buf, &exp);
+ else
+ /* quietly ignore unknown words and anything
+ * following. Newer user-space can try to set
+ * new values, then see what the result was.
+ */
+ break;
+ if (err)
+ goto out4;
+ }
+
+ err = check_export(exp.ex_path.dentry->d_inode, &exp.ex_flags,
+ exp.ex_uuid);
+ if (err)
+ goto out4;
}
expp = svc_export_lookup(&exp);
err = -ENOMEM;
else
exp_put(expp);
- out:
- if (nd.dentry)
- path_release(&nd);
- if (dom)
- auth_domain_put(dom);
+out4:
+ nfsd4_fslocs_free(&exp.ex_fslocs);
+ kfree(exp.ex_uuid);
+out3:
+ kfree(exp.ex_pathname);
+out2:
+ path_put(&exp.ex_path);
+out1:
+ auth_domain_put(dom);
+out:
kfree(buf);
return err;
}
-static void exp_flags(struct seq_file *m, int flag, int fsid, uid_t anonu, uid_t anong);
+static void exp_flags(struct seq_file *m, int flag, int fsid,
+ uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs);
+static void show_secinfo(struct seq_file *m, struct svc_export *exp);
static int svc_export_show(struct seq_file *m,
struct cache_detail *cd,
return 0;
}
exp = container_of(h, struct svc_export, h);
- seq_path(m, exp->ex_mnt, exp->ex_dentry, " \t\n\\");
+ seq_path(m, &exp->ex_path, " \t\n\\");
seq_putc(m, '\t');
seq_escape(m, exp->ex_client->name, " \t\n\\");
seq_putc(m, '(');
if (test_bit(CACHE_VALID, &h->flags) &&
- !test_bit(CACHE_NEGATIVE, &h->flags))
- exp_flags(m, exp->ex_flags, exp->ex_fsid,
- exp->ex_anon_uid, exp->ex_anon_gid);
+ !test_bit(CACHE_NEGATIVE, &h->flags)) {
+ exp_flags(m, exp->ex_flags, exp->ex_fsid,
+ exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs);
+ if (exp->ex_uuid) {
+ int i;
+ seq_puts(m, ",uuid=");
+ for (i=0; i<16; i++) {
+ if ((i&3) == 0 && i)
+ seq_putc(m, ':');
+ seq_printf(m, "%02x", exp->ex_uuid[i]);
+ }
+ }
+ show_secinfo(m, exp);
+ }
seq_puts(m, ")\n");
return 0;
}
struct svc_export *orig = container_of(a, struct svc_export, h);
struct svc_export *new = container_of(b, struct svc_export, h);
return orig->ex_client == new->ex_client &&
- orig->ex_dentry == new->ex_dentry &&
- orig->ex_mnt == new->ex_mnt;
+ orig->ex_path.dentry == new->ex_path.dentry &&
+ orig->ex_path.mnt == new->ex_path.mnt;
}
static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
kref_get(&item->ex_client->ref);
new->ex_client = item->ex_client;
- new->ex_dentry = dget(item->ex_dentry);
- new->ex_mnt = mntget(item->ex_mnt);
+ new->ex_path.dentry = dget(item->ex_path.dentry);
+ new->ex_path.mnt = mntget(item->ex_path.mnt);
+ new->ex_pathname = NULL;
+ new->ex_fslocs.locations = NULL;
+ new->ex_fslocs.locations_count = 0;
+ new->ex_fslocs.migrated = 0;
}
static void export_update(struct cache_head *cnew, struct cache_head *citem)
{
struct svc_export *new = container_of(cnew, struct svc_export, h);
struct svc_export *item = container_of(citem, struct svc_export, h);
+ int i;
new->ex_flags = item->ex_flags;
new->ex_anon_uid = item->ex_anon_uid;
new->ex_anon_gid = item->ex_anon_gid;
new->ex_fsid = item->ex_fsid;
+ new->ex_uuid = item->ex_uuid;
+ item->ex_uuid = NULL;
+ new->ex_pathname = item->ex_pathname;
+ item->ex_pathname = NULL;
+ new->ex_fslocs.locations = item->ex_fslocs.locations;
+ item->ex_fslocs.locations = NULL;
+ new->ex_fslocs.locations_count = item->ex_fslocs.locations_count;
+ item->ex_fslocs.locations_count = 0;
+ new->ex_fslocs.migrated = item->ex_fslocs.migrated;
+ item->ex_fslocs.migrated = 0;
+ new->ex_nflavors = item->ex_nflavors;
+ for (i = 0; i < MAX_SECINFO_LIST; i++) {
+ new->ex_flavors[i] = item->ex_flavors[i];
+ }
}
static struct cache_head *svc_export_alloc(void)
.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,
struct cache_head *ch;
int hash;
hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS);
- hash ^= hash_ptr(exp->ex_dentry, EXPORT_HASHBITS);
- hash ^= hash_ptr(exp->ex_mnt, EXPORT_HASHBITS);
+ hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS);
+ hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS);
ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h,
hash);
struct cache_head *ch;
int hash;
hash = hash_ptr(old->ex_client, EXPORT_HASHBITS);
- hash ^= hash_ptr(old->ex_dentry, EXPORT_HASHBITS);
- hash ^= hash_ptr(old->ex_mnt, EXPORT_HASHBITS);
+ hash ^= hash_ptr(old->ex_path.dentry, EXPORT_HASHBITS);
+ hash ^= hash_ptr(old->ex_path.mnt, EXPORT_HASHBITS);
ch = sunrpc_cache_update(&svc_export_cache, &new->h,
&old->h,
int err;
if (!clp)
- return NULL;
+ return ERR_PTR(-ENOENT);
key.ek_client = clp;
key.ek_fsidtype = fsid_type;
memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
ek = svc_expkey_lookup(&key);
- if (ek != NULL)
- if ((err = cache_check(&svc_expkey_cache, &ek->h, reqp)))
- ek = ERR_PTR(err);
+ if (ek == NULL)
+ return ERR_PTR(-ENOMEM);
+ err = cache_check(&svc_expkey_cache, &ek->h, reqp);
+ if (err)
+ return ERR_PTR(err);
return ek;
}
key.ek_client = clp;
key.ek_fsidtype = fsid_type;
memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
- key.ek_mnt = exp->ex_mnt;
- key.ek_dentry = exp->ex_dentry;
+ key.ek_path = exp->ex_path;
key.h.expiry_time = NEVER;
key.h.flags = 0;
u32 fsidv[3];
if (old_valid_dev(dev)) {
- mk_fsid_v0(fsidv, dev, ino);
- return exp_find_key(clp, 0, fsidv, NULL);
+ mk_fsid(FSID_DEV, fsidv, dev, ino, 0, NULL);
+ return exp_find_key(clp, FSID_DEV, fsidv, NULL);
}
- mk_fsid_v3(fsidv, dev, ino);
- return exp_find_key(clp, 3, fsidv, NULL);
+ mk_fsid(FSID_ENCODE_DEV, fsidv, dev, ino, 0, NULL);
+ return exp_find_key(clp, FSID_ENCODE_DEV, fsidv, NULL);
}
/*
{
u32 fsidv[2];
- mk_fsid_v1(fsidv, fsid);
+ mk_fsid(FSID_NUM, fsidv, 0, 0, fsid, NULL);
- return exp_find_key(clp, 1, fsidv, NULL);
+ return exp_find_key(clp, FSID_NUM, fsidv, NULL);
}
-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;
+
if (!clp)
- return NULL;
+ return ERR_PTR(-ENOENT);
key.ex_client = clp;
- key.ex_mnt = mnt;
- key.ex_dentry = dentry;
+ key.ex_path = *path;
exp = svc_export_lookup(&key);
- if (exp != NULL)
- switch (cache_check(&svc_export_cache, &exp->h, reqp)) {
- case 0: break;
- case -EAGAIN:
- exp = ERR_PTR(-EAGAIN);
- break;
- default:
- exp = NULL;
- }
-
+ if (exp == NULL)
+ return ERR_PTR(-ENOMEM);
+ err = cache_check(&svc_export_cache, &exp->h, reqp);
+ if (err)
+ return ERR_PTR(err);
return exp;
}
/*
* Find the export entry for a given dentry.
*/
-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 (exp == NULL && !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;
}
return;
ek = exp_get_fsid_key(exp->ex_client, exp->ex_fsid);
- if (ek && !IS_ERR(ek)) {
+ if (!IS_ERR(ek)) {
ek->h.expiry_time = get_seconds()-1;
cache_put(&ek->h, &svc_expkey_cache);
}
if ((exp->ex_flags & NFSEXP_FSID) == 0)
return 0;
- mk_fsid_v1(fsid, exp->ex_fsid);
- return exp_set_key(clp, 1, fsid, exp);
+ mk_fsid(FSID_NUM, fsid, 0, 0, exp->ex_fsid, NULL);
+ return exp_set_key(clp, FSID_NUM, fsid, exp);
}
static int exp_hash(struct auth_domain *clp, struct svc_export *exp)
{
u32 fsid[2];
- struct inode *inode = exp->ex_dentry->d_inode;
+ struct inode *inode = exp->ex_path.dentry->d_inode;
dev_t dev = inode->i_sb->s_dev;
if (old_valid_dev(dev)) {
- mk_fsid_v0(fsid, dev, inode->i_ino);
- return exp_set_key(clp, 0, fsid, exp);
+ mk_fsid(FSID_DEV, fsid, dev, inode->i_ino, 0, NULL);
+ return exp_set_key(clp, FSID_DEV, fsid, exp);
}
- mk_fsid_v3(fsid, dev, inode->i_ino);
- return exp_set_key(clp, 3, fsid, exp);
+ mk_fsid(FSID_ENCODE_DEV, fsid, dev, inode->i_ino, 0, NULL);
+ return exp_set_key(clp, FSID_ENCODE_DEV, fsid, exp);
}
static void exp_unhash(struct svc_export *exp)
{
struct svc_expkey *ek;
- struct inode *inode = exp->ex_dentry->d_inode;
+ struct inode *inode = exp->ex_path.dentry->d_inode;
ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino);
- if (ek && !IS_ERR(ek)) {
+ if (!IS_ERR(ek)) {
ek->h.expiry_time = get_seconds()-1;
cache_put(&ek->h, &svc_expkey_cache);
}
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_unlock;
+ goto out_put_clp;
err = -EINVAL;
- exp = exp_get_by_name(clp, nd.mnt, nd.dentry, NULL);
+ exp = exp_get_by_name(clp, &path, NULL);
+
+ memset(&new, 0, sizeof(new));
/* must make sure there won't be an ex_fsid clash */
if ((nxp->ex_flags & NFSEXP_FSID) &&
- (fsid_key = exp_get_fsid_key(clp, nxp->ex_dev)) &&
- !IS_ERR(fsid_key) &&
- fsid_key->ek_mnt &&
- (fsid_key->ek_mnt != nd.mnt || fsid_key->ek_dentry != nd.dentry) )
+ (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) &&
+ fsid_key->ek_path.mnt &&
+ (fsid_key->ek_path.mnt != path.mnt ||
+ fsid_key->ek_path.dentry != path.dentry))
goto finish;
- if (exp) {
+ if (!IS_ERR(exp)) {
/* just a flags/id/fsid update */
exp_fsid_unhash(exp);
goto finish;
}
- err = check_export(nd.dentry->d_inode, nxp->ex_flags);
+ err = check_export(path.dentry->d_inode, &nxp->ex_flags, NULL);
if (err) goto finish;
err = -ENOMEM;
new.h.expiry_time = NEVER;
new.h.flags = 0;
+ new.ex_pathname = kstrdup(nxp->ex_path, GFP_KERNEL);
+ if (!new.ex_pathname)
+ goto finish;
new.ex_client = clp;
- new.ex_mnt = nd.mnt;
- new.ex_dentry = nd.dentry;
+ 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;
/* failed to create at least one index */
exp_do_unexport(exp);
cache_flush();
- err = -ENOMEM;
- }
-
+ } else
+ err = 0;
finish:
+ kfree(new.ex_pathname);
if (exp)
exp_put(exp);
if (fsid_key && !IS_ERR(fsid_key))
cache_put(&fsid_key->h, &svc_expkey_cache);
- if (clp)
- auth_domain_put(clp);
- path_release(&nd);
+ path_put(&path);
+out_put_clp:
+ auth_domain_put(clp);
out_unlock:
exp_writeunlock();
out:
{
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.mnt, nd.dentry, NULL);
- path_release(&nd);
- if (!exp)
+ exp = exp_get_by_name(dom, &path, NULL);
+ path_put(&path);
+ if (IS_ERR(exp))
goto out_domain;
exp_do_unexport(exp);
* 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.dentry->d_inode;
+ inode = path.dentry->d_inode;
dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
- path, nd.dentry, clp->name,
+ name, path.dentry, clp->name,
inode->i_sb->s_id, inode->i_ino);
- exp = exp_parent(clp, nd.mnt, nd.dentry, NULL);
- if (!exp) {
- dprintk("nfsd: exp_rootfh export not found.\n");
+ 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.dentry, NULL))
+ if (fh_compose(&fh, exp, path.dentry, NULL))
err = -EINVAL;
else
err = 0;
fh_put(&fh);
exp_put(exp);
out:
- path_release(&nd);
+ path_put(&path);
return err;
}
-struct svc_export *
-exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
- struct cache_req *reqp)
+static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type,
+ u32 *fsidv, struct cache_req *reqp)
{
struct svc_export *exp;
struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp);
- if (!ek || IS_ERR(ek))
- return ERR_PTR(PTR_ERR(ek));
+ if (IS_ERR(ek))
+ return ERR_CAST(ek);
- exp = exp_get_by_name(clp, ek->ek_mnt, ek->ek_dentry, reqp);
+ exp = exp_get_by_name(clp, &ek->ek_path, reqp);
cache_put(&ek->h, &svc_expkey_cache);
- if (!exp || IS_ERR(exp))
- return ERR_PTR(PTR_ERR(exp));
+ if (IS_ERR(exp))
+ return ERR_CAST(exp);
return exp;
}
+__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp)
+{
+ struct exp_flavor_info *f;
+ struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+
+ /* legacy gss-only clients are always OK: */
+ if (exp->ex_client == rqstp->rq_gssclient)
+ return 0;
+ /* ip-address based client; check sec= export option: */
+ for (f = exp->ex_flavors; f < end; f++) {
+ if (f->pseudoflavor == rqstp->rq_flavor)
+ return 0;
+ }
+ /* defaults in absence of sec= options: */
+ if (exp->ex_nflavors == 0) {
+ if (rqstp->rq_flavor == RPC_AUTH_NULL ||
+ rqstp->rq_flavor == RPC_AUTH_UNIX)
+ return 0;
+ }
+ return nfserr_wrongsec;
+}
/*
- * Called when we need the filehandle for the root of the pseudofs,
- * for a given NFSv4 client. The root is defined to be the
- * export point with fsid==0
+ * Uses rq_client and rq_gssclient to find an export; uses rq_client (an
+ * auth_unix client) if it's available and has secinfo information;
+ * otherwise, will try to use rq_gssclient.
+ *
+ * Called from functions that handle requests; functions that do work on
+ * behalf of mountd are passed a single client name to use, and should
+ * use exp_get_by_name() or exp_find().
*/
-int
-exp_pseudoroot(struct auth_domain *clp, struct svc_fh *fhp,
- struct cache_req *creq)
+struct svc_export *
+rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path)
+{
+ struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
+
+ if (rqstp->rq_client == NULL)
+ goto gss;
+
+ /* First try the auth_unix client: */
+ exp = exp_get_by_name(rqstp->rq_client, path, &rqstp->rq_chandle);
+ if (PTR_ERR(exp) == -ENOENT)
+ goto gss;
+ if (IS_ERR(exp))
+ return exp;
+ /* If it has secinfo, assume there are no gss/... clients */
+ if (exp->ex_nflavors > 0)
+ return exp;
+gss:
+ /* Otherwise, try falling back on gss client */
+ if (rqstp->rq_gssclient == NULL)
+ return exp;
+ gssexp = exp_get_by_name(rqstp->rq_gssclient, path, &rqstp->rq_chandle);
+ if (PTR_ERR(gssexp) == -ENOENT)
+ return exp;
+ if (!IS_ERR(exp))
+ exp_put(exp);
+ return gssexp;
+}
+
+struct svc_export *
+rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
+{
+ struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
+
+ if (rqstp->rq_client == NULL)
+ goto gss;
+
+ /* First try the auth_unix client: */
+ exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle);
+ if (PTR_ERR(exp) == -ENOENT)
+ goto gss;
+ if (IS_ERR(exp))
+ return exp;
+ /* If it has secinfo, assume there are no gss/... clients */
+ if (exp->ex_nflavors > 0)
+ return exp;
+gss:
+ /* Otherwise, try falling back on gss client */
+ if (rqstp->rq_gssclient == NULL)
+ return exp;
+ gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv,
+ &rqstp->rq_chandle);
+ if (PTR_ERR(gssexp) == -ENOENT)
+ return exp;
+ if (!IS_ERR(exp))
+ exp_put(exp);
+ return gssexp;
+}
+
+struct svc_export *
+rqst_exp_parent(struct svc_rqst *rqstp, struct path *path)
+{
+ 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;
+}
+
+static struct svc_export *find_fsidzero_export(struct svc_rqst *rqstp)
{
- struct svc_expkey *fsid_key;
struct svc_export *exp;
- int rv;
u32 fsidv[2];
- mk_fsid_v1(fsidv, 0);
+ mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL);
- fsid_key = exp_find_key(clp, 1, fsidv, creq);
- if (IS_ERR(fsid_key) && PTR_ERR(fsid_key) == -EAGAIN)
- return nfserr_dropit;
- if (!fsid_key || IS_ERR(fsid_key))
- return nfserr_perm;
+ 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;
+}
- exp = exp_get_by_name(clp, fsid_key->ek_mnt, fsid_key->ek_dentry, creq);
- if (exp == NULL)
- rv = nfserr_perm;
- else if (IS_ERR(exp))
- rv = nfserrno(PTR_ERR(exp));
- else
- rv = fh_compose(fhp, exp,
- fsid_key->ek_dentry, NULL);
- cache_put(&fsid_key->h, &svc_expkey_cache);
+/*
+ * Called when we need the filehandle for the root of the pseudofs,
+ * for a given NFSv4 client. The root is defined to be the
+ * export point with fsid==0
+ */
+__be32
+exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
+{
+ struct svc_export *exp;
+ __be32 rv;
+
+ 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;
}
/* Iterator */
static void *e_start(struct seq_file *m, loff_t *pos)
+ __acquires(svc_export_cache.hash_lock)
{
loff_t n = *pos;
unsigned hash, export;
exp_readlock();
read_lock(&svc_export_cache.hash_lock);
if (!n--)
- return (void *)1;
+ return SEQ_START_TOKEN;
hash = n >> 32;
export = n & ((1LL<<32) - 1);
struct cache_head *ch = p;
int hash = (*pos >> 32);
- if (p == (void *)1)
+ if (p == SEQ_START_TOKEN)
hash = 0;
else if (ch->next == NULL) {
hash++;
}
static void e_stop(struct seq_file *m, void *p)
+ __releases(svc_export_cache.hash_lock)
{
read_unlock(&svc_export_cache.hash_lock);
exp_readunlock();
{ NFSEXP_CROSSMOUNT, {"crossmnt", ""}},
{ NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}},
{ NFSEXP_NOAUTHNLM, {"insecure_locks", ""}},
+ { NFSEXP_V4ROOT, {"v4root", ""}},
#ifdef MSNFS
{ NFSEXP_MSNFS, {"msnfs", ""}},
#endif
{ 0, {"", ""}}
};
-static void exp_flags(struct seq_file *m, int flag, int fsid, uid_t anonu, uid_t anong)
+static void show_expflags(struct seq_file *m, int flags, int mask)
{
- int first = 0;
struct flags *flg;
+ int state, first = 0;
for (flg = expflags; flg->flag; flg++) {
- int state = (flg->flag & flag)?0:1;
+ if (flg->flag & ~mask)
+ continue;
+ state = (flg->flag & flags) ? 0 : 1;
if (*flg->name[state])
seq_printf(m, "%s%s", first++?",":"", flg->name[state]);
}
+}
+
+static void show_secinfo_flags(struct seq_file *m, int flags)
+{
+ seq_printf(m, ",");
+ show_expflags(m, flags, NFSEXP_SECINFO_FLAGS);
+}
+
+static void show_secinfo(struct seq_file *m, struct svc_export *exp)
+{
+ struct exp_flavor_info *f;
+ struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+ int lastflags = 0, first = 0;
+
+ if (exp->ex_nflavors == 0)
+ return;
+ for (f = exp->ex_flavors; f < end; f++) {
+ if (first || f->flags != lastflags) {
+ if (!first)
+ show_secinfo_flags(m, lastflags);
+ seq_printf(m, ",sec=%d", f->pseudoflavor);
+ lastflags = f->flags;
+ } else {
+ seq_printf(m, ":%d", f->pseudoflavor);
+ }
+ }
+ show_secinfo_flags(m, lastflags);
+}
+
+static void exp_flags(struct seq_file *m, int flag, int fsid,
+ uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc)
+{
+ show_expflags(m, flag, NFSEXP_ALLFLAGS);
if (flag & NFSEXP_FSID)
- seq_printf(m, "%sfsid=%d", first++?",":"", fsid);
+ seq_printf(m, ",fsid=%d", fsid);
if (anonu != (uid_t)-2 && anonu != (0x10000-2))
- seq_printf(m, "%sanonuid=%d", first++?",":"", anonu);
+ seq_printf(m, ",anonuid=%u", anonu);
if (anong != (gid_t)-2 && anong != (0x10000-2))
- seq_printf(m, "%sanongid=%d", first++?",":"", anong);
+ seq_printf(m, ",anongid=%u", anong);
+ if (fsloc && fsloc->locations_count > 0) {
+ char *loctype = (fsloc->migrated) ? "refer" : "replicas";
+ int i;
+
+ seq_printf(m, ",%s=", loctype);
+ seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\");
+ seq_putc(m, '@');
+ seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\");
+ for (i = 1; i < fsloc->locations_count; i++) {
+ seq_putc(m, ';');
+ seq_escape(m, fsloc->locations[i].path, ",;@ \t\n\\");
+ seq_putc(m, '@');
+ seq_escape(m, fsloc->locations[i].hosts, ",;@ \t\n\\");
+ }
+ }
}
static int e_show(struct seq_file *m, void *p)
{
struct cache_head *cp = p;
struct svc_export *exp = container_of(cp, struct svc_export, h);
- svc_client *clp;
- if (p == (void *)1) {
+ if (p == SEQ_START_TOKEN) {
seq_puts(m, "# Version 1.1\n");
seq_puts(m, "# Path Client(Flags) # IPs\n");
return 0;
}
- clp = exp->ex_client;
cache_get(&exp->h);
if (cache_check(&svc_export_cache, &exp->h, NULL))
return 0;
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,
{
struct auth_domain *dom;
int i, err;
+ struct in6_addr addr6;
/* First, consistency check. */
err = -EINVAL;
goto out_unlock;
/* Insert client into hashtable. */
- for (i = 0; i < ncp->cl_naddr; i++)
- auth_unix_add_addr(ncp->cl_addrlist[i], dom);
-
+ for (i = 0; i < ncp->cl_naddr; i++) {
+ ipv6_addr_set_v4mapped(ncp->cl_addrlist[i].s_addr, &addr6);
+ auth_unix_add_addr(&addr6, dom);
+ }
auth_unix_forget_old(dom);
auth_domain_put(dom);
/*
* Initialize the exports module.
*/
-void
+int
nfsd_export_init(void)
{
+ int rv;
dprintk("nfsd: initializing export module.\n");
- cache_register(&svc_export_cache);
- cache_register(&svc_expkey_cache);
+ rv = cache_register(&svc_export_cache);
+ if (rv)
+ return rv;
+ rv = cache_register(&svc_expkey_cache);
+ if (rv)
+ cache_unregister(&svc_export_cache);
+ return rv;
}
exp_writelock();
- if (cache_unregister(&svc_expkey_cache))
- printk(KERN_ERR "nfsd: failed to unregister expkey cache\n");
- if (cache_unregister(&svc_export_cache))
- printk(KERN_ERR "nfsd: failed to unregister export cache\n");
+ cache_unregister(&svc_expkey_cache);
+ cache_unregister(&svc_export_cache);
svcauth_unix_purge();
exp_writeunlock();
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff