#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/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>
#define NFSDDBG_FACILITY NFSDDBG_EXPORT
-#define NFSD_PARANOIA 1
typedef struct auth_domain svc_client;
typedef struct svc_export svc_export;
#define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1)
static struct cache_head *expkey_table[EXPKEY_HASHMAX];
-static inline int svc_expkey_hash(struct svc_expkey *item)
+static void expkey_put(struct kref *ref)
{
- int hash = item->ek_fsidtype;
- char * cp = (char*)item->ek_fsid;
- int len = key_len(item->ek_fsidtype);
-
- hash ^= hash_mem(cp, len, EXPKEY_HASHBITS);
- hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS);
- return hash & EXPKEY_HASHMASK;
-}
+ struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref);
-void expkey_put(struct cache_head *item, struct cache_detail *cd)
-{
- if (cache_put(item, cd)) {
- struct svc_expkey *key = container_of(item, struct svc_expkey, h);
- if (test_bit(CACHE_VALID, &item->flags) &&
- !test_bit(CACHE_NEGATIVE, &item->flags))
- exp_put(key->ek_export);
- auth_domain_put(key->ek_client);
- kfree(key);
+ if (test_bit(CACHE_VALID, &key->h.flags) &&
+ !test_bit(CACHE_NEGATIVE, &key->h.flags)) {
+ dput(key->ek_dentry);
+ mntput(key->ek_mnt);
}
+ auth_domain_put(key->ek_client);
+ kfree(key);
}
static void expkey_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
-static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *, int);
+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;
+
static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
{
/* client fsidtype fsid [path] */
int fsidtype;
char *ep;
struct svc_expkey key;
+ struct svc_expkey *ek;
if (mesg[mlen-1] != '\n')
return -EINVAL;
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;
key.ek_fsidtype = fsidtype;
memcpy(key.ek_fsid, buf, len);
+ ek = svc_expkey_lookup(&key);
+ err = -ENOMEM;
+ if (!ek)
+ goto out;
+
/* now we want a pathname, or empty meaning NEGATIVE */
+ err = -EINVAL;
if ((len=qword_get(&mesg, buf, PAGE_SIZE)) < 0)
goto out;
dprintk("Path seems to be <%s>\n", buf);
err = 0;
if (len == 0) {
- struct svc_expkey *ek;
set_bit(CACHE_NEGATIVE, &key.h.flags);
- ek = svc_expkey_lookup(&key, 1);
+ ek = svc_expkey_update(&key, ek);
if (ek)
- expkey_put(&ek->h, &svc_expkey_cache);
+ cache_put(&ek->h, &svc_expkey_cache);
+ else err = -ENOMEM;
} else {
struct nameidata nd;
- struct svc_expkey *ek;
- struct svc_export *exp;
err = path_lookup(buf, 0, &nd);
if (err)
goto out;
dprintk("Found the path %s\n", buf);
- exp = exp_get_by_name(dom, nd.mnt, nd.dentry, NULL);
-
- err = -ENOENT;
- if (!exp)
- goto out_nd;
- key.ek_export = exp;
- dprintk("And found export\n");
+ key.ek_mnt = nd.mnt;
+ key.ek_dentry = nd.dentry;
- ek = svc_expkey_lookup(&key, 1);
+ ek = svc_expkey_update(&key, ek);
if (ek)
- expkey_put(&ek->h, &svc_expkey_cache);
- exp_put(exp);
- err = 0;
- out_nd:
+ cache_put(&ek->h, &svc_expkey_cache);
+ else
+ err = -ENOMEM;
path_release(&nd);
}
cache_flush();
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_export->ex_mnt, ek->ek_export->ex_dentry, "\\ \t\n");
+ seq_path(m, ek->ek_mnt, ek->ek_dentry, "\\ \t\n");
}
seq_printf(m, "\n");
return 0;
}
-
-struct cache_detail svc_expkey_cache = {
+
+static inline int expkey_match (struct cache_head *a, struct cache_head *b)
+{
+ struct svc_expkey *orig = container_of(a, struct svc_expkey, h);
+ struct svc_expkey *new = container_of(b, struct svc_expkey, h);
+
+ if (orig->ek_fsidtype != new->ek_fsidtype ||
+ orig->ek_client != new->ek_client ||
+ memcmp(orig->ek_fsid, new->ek_fsid, key_len(orig->ek_fsidtype)) != 0)
+ return 0;
+ return 1;
+}
+
+static inline void expkey_init(struct cache_head *cnew,
+ struct cache_head *citem)
+{
+ struct svc_expkey *new = container_of(cnew, struct svc_expkey, h);
+ struct svc_expkey *item = container_of(citem, struct svc_expkey, h);
+
+ kref_get(&item->ek_client->ref);
+ new->ek_client = item->ek_client;
+ new->ek_fsidtype = item->ek_fsidtype;
+
+ memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid));
+}
+
+static inline void expkey_update(struct cache_head *cnew,
+ struct cache_head *citem)
+{
+ 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);
+}
+
+static struct cache_head *expkey_alloc(void)
+{
+ struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL);
+ if (i)
+ return &i->h;
+ else
+ return NULL;
+}
+
+static struct cache_detail svc_expkey_cache = {
.owner = THIS_MODULE,
.hash_size = EXPKEY_HASHMAX,
.hash_table = expkey_table,
.cache_request = expkey_request,
.cache_parse = expkey_parse,
.cache_show = expkey_show,
+ .match = expkey_match,
+ .init = expkey_init,
+ .update = expkey_update,
+ .alloc = expkey_alloc,
};
-static inline int svc_expkey_match (struct svc_expkey *a, struct svc_expkey *b)
+static struct svc_expkey *
+svc_expkey_lookup(struct svc_expkey *item)
{
- if (a->ek_fsidtype != b->ek_fsidtype ||
- a->ek_client != b->ek_client ||
- memcmp(a->ek_fsid, b->ek_fsid, key_len(a->ek_fsidtype)) != 0)
- return 0;
- return 1;
-}
+ struct cache_head *ch;
+ int hash = item->ek_fsidtype;
+ char * cp = (char*)item->ek_fsid;
+ int len = key_len(item->ek_fsidtype);
-static inline void svc_expkey_init(struct svc_expkey *new, struct svc_expkey *item)
-{
- cache_get(&item->ek_client->h);
- 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];
+ hash ^= hash_mem(cp, len, EXPKEY_HASHBITS);
+ hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS);
+ hash &= EXPKEY_HASHMASK;
+
+ ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h,
+ hash);
+ if (ch)
+ return container_of(ch, struct svc_expkey, h);
+ else
+ return NULL;
}
-static inline void svc_expkey_update(struct svc_expkey *new, struct svc_expkey *item)
+static struct svc_expkey *
+svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old)
{
- cache_get(&item->ek_export->h);
- new->ek_export = item->ek_export;
+ struct cache_head *ch;
+ int hash = new->ek_fsidtype;
+ char * cp = (char*)new->ek_fsid;
+ int len = key_len(new->ek_fsidtype);
+
+ hash ^= hash_mem(cp, len, EXPKEY_HASHBITS);
+ hash ^= hash_ptr(new->ek_client, EXPKEY_HASHBITS);
+ hash &= EXPKEY_HASHMASK;
+
+ ch = sunrpc_cache_update(&svc_expkey_cache, &new->h,
+ &old->h, hash);
+ if (ch)
+ return container_of(ch, struct svc_expkey, h);
+ else
+ return NULL;
}
-static DefineSimpleCacheLookup(svc_expkey,0) /* no inplace updates */
#define EXPORT_HASHBITS 8
#define EXPORT_HASHMAX (1<< EXPORT_HASHBITS)
static struct cache_head *export_table[EXPORT_HASHMAX];
-static inline int svc_export_hash(struct svc_export *item)
+static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc)
{
- int rv;
+ int i;
- rv = hash_ptr(item->ex_client, EXPORT_HASHBITS);
- rv ^= hash_ptr(item->ex_dentry, EXPORT_HASHBITS);
- rv ^= hash_ptr(item->ex_mnt, EXPORT_HASHBITS);
- return rv;
+ for (i = 0; i < fsloc->locations_count; i++) {
+ kfree(fsloc->locations[i].path);
+ kfree(fsloc->locations[i].hosts);
+ }
+ kfree(fsloc->locations);
}
-void svc_export_put(struct cache_head *item, struct cache_detail *cd)
+static void svc_export_put(struct kref *ref)
{
- if (cache_put(item, cd)) {
- struct svc_export *exp = container_of(item, struct svc_export, h);
- dput(exp->ex_dentry);
- mntput(exp->ex_mnt);
- auth_domain_put(exp->ex_client);
- kfree(exp);
- }
+ struct svc_export *exp = container_of(ref, struct svc_export, h.ref);
+ dput(exp->ex_dentry);
+ mntput(exp->ex_mnt);
+ auth_domain_put(exp->ex_client);
+ kfree(exp->ex_path);
+ nfsd4_fslocs_free(&exp->ex_fslocs);
+ kfree(exp);
}
static void svc_export_request(struct cache_detail *cd,
(*bpp)[-1] = '\n';
}
-static struct svc_export *svc_export_lookup(struct svc_export *, int);
+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.
/* 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) {
}
+#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;
+ /*
+ * 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.
+ */
+ if (f->pseudoflavor < 0)
+ return -EINVAL;
+ 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 an_int;
nd.dentry = NULL;
+ exp.ex_path = 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;
if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
goto out;
err = path_lookup(buf, 0, &nd);
- if (err) goto out;
+ if (err) goto out_no_path;
exp.h.flags = 0;
exp.ex_client = dom;
exp.ex_mnt = nd.mnt;
exp.ex_dentry = nd.dentry;
+ exp.ex_path = kstrdup(buf, GFP_KERNEL);
+ err = -ENOMEM;
+ if (!exp.ex_path)
+ goto out;
/* expiry */
err = -EINVAL;
if (err) goto out;
exp.ex_fsid = an_int;
- err = check_export(nd.dentry->d_inode, exp.ex_flags);
+ 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 out;
+ }
+
+ err = check_export(nd.dentry->d_inode, exp.ex_flags,
+ exp.ex_uuid);
if (err) goto out;
}
- expp = svc_export_lookup(&exp, 1);
+ expp = svc_export_lookup(&exp);
if (expp)
- exp_put(expp);
- err = 0;
+ expp = svc_export_update(&exp, expp);
+ else
+ err = -ENOMEM;
cache_flush();
+ if (expp == NULL)
+ err = -ENOMEM;
+ else
+ exp_put(expp);
out:
+ nfsd4_fslocs_free(&exp.ex_fslocs);
+ kfree(exp.ex_uuid);
+ kfree(exp.ex_path);
if (nd.dentry)
path_release(&nd);
+ out_no_path:
if (dom)
auth_domain_put(dom);
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 int svc_export_show(struct seq_file *m,
struct cache_detail *cd,
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]);
+ }
+ }
+ }
seq_puts(m, ")\n");
return 0;
}
+static int svc_export_match(struct cache_head *a, struct cache_head *b)
+{
+ 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;
+}
+
+static void svc_export_init(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);
+
+ 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 = 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_path = item->ex_path;
+ item->ex_path = 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)
+{
+ struct svc_export *i = kmalloc(sizeof(*i), GFP_KERNEL);
+ if (i)
+ return &i->h;
+ else
+ return NULL;
+}
+
struct cache_detail svc_export_cache = {
.owner = THIS_MODULE,
.hash_size = EXPORT_HASHMAX,
.cache_request = svc_export_request,
.cache_parse = svc_export_parse,
.cache_show = svc_export_show,
+ .match = svc_export_match,
+ .init = svc_export_init,
+ .update = export_update,
+ .alloc = svc_export_alloc,
};
-static inline int svc_export_match(struct svc_export *a, struct svc_export *b)
+static struct svc_export *
+svc_export_lookup(struct svc_export *exp)
{
- return a->ex_client == b->ex_client &&
- a->ex_dentry == b->ex_dentry &&
- a->ex_mnt == b->ex_mnt;
-}
-static inline void svc_export_init(struct svc_export *new, struct svc_export *item)
-{
- cache_get(&item->ex_client->h);
- new->ex_client = item->ex_client;
- new->ex_dentry = dget(item->ex_dentry);
- new->ex_mnt = mntget(item->ex_mnt);
+ 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);
+
+ ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h,
+ hash);
+ if (ch)
+ return container_of(ch, struct svc_export, h);
+ else
+ return NULL;
}
-static inline void svc_export_update(struct svc_export *new, struct svc_export *item)
+static struct svc_export *
+svc_export_update(struct svc_export *new, struct svc_export *old)
{
- 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;
+ 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);
+
+ ch = sunrpc_cache_update(&svc_export_cache, &new->h,
+ &old->h,
+ hash);
+ if (ch)
+ return container_of(ch, struct svc_export, h);
+ else
+ return NULL;
}
-static DefineSimpleCacheLookup(svc_export,1) /* allow inplace updates */
-
-struct svc_expkey *
+static struct svc_expkey *
exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp)
{
struct svc_expkey key, *ek;
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, 0);
- if (ek != NULL)
- if ((err = cache_check(&svc_expkey_cache, &ek->h, reqp)))
- ek = ERR_PTR(err);
+ ek = svc_expkey_lookup(&key);
+ 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_export = exp;
+ key.ek_mnt = exp->ex_mnt;
+ key.ek_dentry = exp->ex_dentry;
key.h.expiry_time = NEVER;
key.h.flags = 0;
- ek = svc_expkey_lookup(&key, 1);
+ ek = svc_expkey_lookup(&key);
+ if (ek)
+ ek = svc_expkey_update(&key,ek);
if (ek) {
- expkey_put(&ek->h, &svc_expkey_cache);
+ cache_put(&ek->h, &svc_expkey_cache);
return 0;
}
return -ENOMEM;
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 *
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;
- exp = svc_export_lookup(&key, 0);
- 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;
- }
-
+ exp = svc_export_lookup(&key);
+ if (exp == NULL)
+ return ERR_PTR(-ENOMEM);
+ err = cache_check(&svc_export_cache, &exp->h, reqp);
+ if (err)
+ return ERR_PTR(err);
return exp;
}
dget(dentry);
exp = exp_get_by_name(clp, mnt, dentry, reqp);
- while (exp == NULL && !IS_ROOT(dentry)) {
+ while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {
struct dentry *parent;
parent = dget_parent(dentry);
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;
- expkey_put(&ek->h, &svc_expkey_cache);
+ cache_put(&ek->h, &svc_expkey_cache);
}
svc_expkey_cache.nextcheck = get_seconds();
}
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)
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 inode *inode = exp->ex_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;
- expkey_put(&ek->h, &svc_expkey_cache);
+ cache_put(&ek->h, &svc_expkey_cache);
}
svc_expkey_cache.nextcheck = get_seconds();
}
exp = exp_get_by_name(clp, nd.mnt, nd.dentry, 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_export &&
- fsid_key->ek_export != exp)
+ (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) &&
+ fsid_key->ek_mnt &&
+ (fsid_key->ek_mnt != nd.mnt || fsid_key->ek_dentry != nd.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(nd.dentry->d_inode, nxp->ex_flags, NULL);
if (err) goto finish;
err = -ENOMEM;
new.h.expiry_time = NEVER;
new.h.flags = 0;
+ new.ex_path = kstrdup(nxp->ex_path, GFP_KERNEL);
+ if (!new.ex_path)
+ goto finish;
new.ex_client = clp;
new.ex_mnt = nd.mnt;
new.ex_dentry = nd.dentry;
new.ex_anon_gid = nxp->ex_anon_gid;
new.ex_fsid = nxp->ex_dev;
- exp = svc_export_lookup(&new, 1);
+ exp = svc_export_lookup(&new);
+ if (exp)
+ exp = svc_export_update(&new, exp);
- if (exp == NULL)
+ if (!exp)
goto finish;
- err = 0;
-
if (exp_hash(clp, exp) ||
exp_fsid_hash(clp, exp)) {
/* failed to create at least one index */
exp_do_unexport(exp);
cache_flush();
- err = -ENOMEM;
- }
-
+ } else
+ err = 0;
finish:
+ if (new.ex_path)
+ kfree(new.ex_path);
if (exp)
exp_put(exp);
if (fsid_key && !IS_ERR(fsid_key))
- expkey_put(&fsid_key->h, &svc_expkey_cache);
+ cache_put(&fsid_key->h, &svc_expkey_cache);
if (clp)
auth_domain_put(clp);
path_release(&nd);
err = -EINVAL;
exp = exp_get_by_name(dom, nd.mnt, nd.dentry, NULL);
path_release(&nd);
- if (!exp)
+ if (IS_ERR(exp))
goto out_domain;
exp_do_unexport(exp);
path, nd.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");
+ if (IS_ERR(exp)) {
+ err = PTR_ERR(exp);
goto out;
}
return err;
}
+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 (IS_ERR(ek))
+ return ERR_PTR(PTR_ERR(ek));
+
+ exp = exp_get_by_name(clp, ek->ek_mnt, ek->ek_dentry, reqp);
+ cache_put(&ek->h, &svc_expkey_cache);
+
+ if (IS_ERR(exp))
+ return ERR_PTR(PTR_ERR(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;
+}
+
+/*
+ * 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().
+ */
+struct svc_export *
+rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
+ struct dentry *dentry)
+{
+ struct svc_export *gssexp, *exp = NULL;
+
+ if (rqstp->rq_client == NULL)
+ goto gss;
+
+ /* First try the auth_unix client: */
+ exp = exp_get_by_name(rqstp->rq_client, mnt, dentry,
+ &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, mnt, dentry,
+ &rqstp->rq_chandle);
+ if (PTR_ERR(gssexp) == -ENOENT)
+ return exp;
+ if (exp && !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 = NULL;
+
+ 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 (exp && !IS_ERR(exp))
+ exp_put(exp);
+ return gssexp;
+}
+
+struct svc_export *
+rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt,
+ struct dentry *dentry)
+{
+ struct svc_export *exp;
+
+ dget(dentry);
+ exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
+
+ while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {
+ struct dentry *parent;
+
+ parent = dget_parent(dentry);
+ dput(dentry);
+ dentry = parent;
+ exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
+ }
+ dput(dentry);
+ return exp;
+}
+
/*
* 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
*/
-int
-exp_pseudoroot(struct auth_domain *clp, struct svc_fh *fhp,
- struct cache_req *creq)
+__be32
+exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
{
- struct svc_expkey *fsid_key;
- int rv;
+ struct svc_export *exp;
+ __be32 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))
+ exp = rqst_exp_find(rqstp, FSID_NUM, fsidv);
+ if (PTR_ERR(exp) == -ENOENT)
return nfserr_perm;
-
- rv = fh_compose(fhp, fsid_key->ek_export,
- fsid_key->ek_export->ex_dentry, NULL);
- expkey_put(&fsid_key->h, &svc_expkey_cache);
+ if (IS_ERR(exp))
+ return nfserrno(PTR_ERR(exp));
+ rv = fh_compose(fhp, exp, exp->ex_dentry, NULL);
+ if (rv)
+ goto out;
+ rv = check_nfsd_access(exp, rqstp);
+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();
{ 0, {"", ""}}
};
-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 *fsloc)
{
int first = 0;
struct flags *flg;
seq_printf(m, "%sanonuid=%d", first++?",":"", anonu);
if (anong != (gid_t)-2 && anong != (0x10000-2))
seq_printf(m, "%sanongid=%d", first++?",":"", anong);
+ if (fsloc && fsloc->locations_count > 0) {
+ char *loctype = (fsloc->migrated) ? "refer" : "replicas";
+ int i;
+
+ seq_printf(m, "%s%s=", first++?",":"", 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;
- if (cache_put(&exp->h, &svc_export_cache)) BUG();
+ cache_put(&exp->h, &svc_export_cache);
return svc_export_show(m, &svc_export_cache, cp);
}
*/
if (dom) {
err = auth_unix_forget_old(dom);
- dom->h.expiry_time = get_seconds();
auth_domain_put(dom);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff