2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* NFS exporting and validation.
|
|
|
|
*
|
|
|
|
* We maintain a list of clients, each of which has a list of
|
|
|
|
* exports. To export an fs to a given client, you first have
|
|
|
|
* to create the client entry with NFSCTL_ADDCLIENT, which
|
|
|
|
* creates a client control block and adds it to the hash
|
|
|
|
* table. Then, you call NFSCTL_EXPORT for each fs.
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de>
|
|
|
|
*/
|
|
|
|
|
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 09:04:11 +01:00
|
|
|
#include <linux/slab.h>
|
2005-04-17 00:20:36 +02:00
|
|
|
#include <linux/namei.h>
|
2005-09-07 00:17:08 +02:00
|
|
|
#include <linux/module.h>
|
2007-07-17 13:04:28 +02:00
|
|
|
#include <linux/exportfs.h>
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
#include <linux/nfsd/syscall.h>
|
2008-01-18 15:50:56 +01:00
|
|
|
#include <net/ipv6.h>
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-12-03 19:30:56 +01:00
|
|
|
#include "nfsd.h"
|
2009-12-05 01:36:06 +01:00
|
|
|
#include "nfsfh.h"
|
2009-12-03 19:30:56 +01:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
#define NFSDDBG_FACILITY NFSDDBG_EXPORT
|
|
|
|
|
|
|
|
typedef struct auth_domain svc_client;
|
|
|
|
typedef struct svc_export svc_export;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We have two caches.
|
|
|
|
* One maps client+vfsmnt+dentry to export options - the export map
|
|
|
|
* The other maps client+filehandle-fragment to export options. - the expkey map
|
|
|
|
*
|
|
|
|
* The export options are actually stored in the first map, and the
|
|
|
|
* second map contains a reference to the entry in the first map.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define EXPKEY_HASHBITS 8
|
|
|
|
#define EXPKEY_HASHMAX (1 << EXPKEY_HASHBITS)
|
|
|
|
#define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1)
|
|
|
|
static struct cache_head *expkey_table[EXPKEY_HASHMAX];
|
|
|
|
|
2006-03-27 11:15:10 +02:00
|
|
|
static void expkey_put(struct kref *ref)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-03-27 11:15:09 +02:00
|
|
|
struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref);
|
|
|
|
|
|
|
|
if (test_bit(CACHE_VALID, &key->h.flags) &&
|
2008-02-15 04:38:41 +01:00
|
|
|
!test_bit(CACHE_NEGATIVE, &key->h.flags))
|
|
|
|
path_put(&key->ek_path);
|
2006-03-27 11:15:09 +02:00
|
|
|
auth_domain_put(key->ek_client);
|
|
|
|
kfree(key);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void expkey_request(struct cache_detail *cd,
|
|
|
|
struct cache_head *h,
|
|
|
|
char **bpp, int *blen)
|
|
|
|
{
|
|
|
|
/* client fsidtype \xfsid */
|
|
|
|
struct svc_expkey *ek = container_of(h, struct svc_expkey, h);
|
|
|
|
char type[5];
|
|
|
|
|
|
|
|
qword_add(bpp, blen, ek->ek_client->name);
|
|
|
|
snprintf(type, 5, "%d", ek->ek_fsidtype);
|
|
|
|
qword_add(bpp, blen, type);
|
|
|
|
qword_addhex(bpp, blen, (char*)ek->ek_fsid, key_len(ek->ek_fsidtype));
|
|
|
|
(*bpp)[-1] = '\n';
|
|
|
|
}
|
|
|
|
|
2009-08-09 21:14:29 +02:00
|
|
|
static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
|
|
|
|
{
|
|
|
|
return sunrpc_cache_pipe_upcall(cd, h, expkey_request);
|
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:04 +02:00
|
|
|
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 *);
|
2006-03-27 11:15:10 +02:00
|
|
|
static struct cache_detail svc_expkey_cache;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
|
|
|
|
{
|
|
|
|
/* client fsidtype fsid [path] */
|
|
|
|
char *buf;
|
|
|
|
int len;
|
|
|
|
struct auth_domain *dom = NULL;
|
|
|
|
int err;
|
|
|
|
int fsidtype;
|
|
|
|
char *ep;
|
|
|
|
struct svc_expkey key;
|
2008-10-20 22:34:21 +02:00
|
|
|
struct svc_expkey *ek = NULL;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (mesg[mlen-1] != '\n')
|
|
|
|
return -EINVAL;
|
|
|
|
mesg[mlen-1] = 0;
|
|
|
|
|
|
|
|
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
|
|
|
|
err = -ENOMEM;
|
2008-10-20 22:34:21 +02:00
|
|
|
if (!buf)
|
|
|
|
goto out;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
err = -EINVAL;
|
|
|
|
if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
err = -ENOENT;
|
|
|
|
dom = auth_domain_find(buf);
|
|
|
|
if (!dom)
|
|
|
|
goto out;
|
|
|
|
dprintk("found domain %s\n", buf);
|
|
|
|
|
|
|
|
err = -EINVAL;
|
|
|
|
if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
|
|
|
|
goto out;
|
|
|
|
fsidtype = simple_strtoul(buf, &ep, 10);
|
|
|
|
if (*ep)
|
|
|
|
goto out;
|
|
|
|
dprintk("found fsidtype %d\n", fsidtype);
|
2006-06-30 10:56:11 +02:00
|
|
|
if (key_len(fsidtype)==0) /* invalid type */
|
2005-04-17 00:20:36 +02:00
|
|
|
goto out;
|
|
|
|
if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
|
|
|
|
goto out;
|
|
|
|
dprintk("found fsid length %d\n", len);
|
|
|
|
if (len != key_len(fsidtype))
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
/* OK, we seem to have a valid key */
|
|
|
|
key.h.flags = 0;
|
|
|
|
key.h.expiry_time = get_expiry(&mesg);
|
|
|
|
if (key.h.expiry_time == 0)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
key.ek_client = dom;
|
|
|
|
key.ek_fsidtype = fsidtype;
|
|
|
|
memcpy(key.ek_fsid, buf, len);
|
|
|
|
|
2006-03-27 11:15:04 +02:00
|
|
|
ek = svc_expkey_lookup(&key);
|
|
|
|
err = -ENOMEM;
|
|
|
|
if (!ek)
|
|
|
|
goto out;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/* now we want a pathname, or empty meaning NEGATIVE */
|
2006-03-27 11:15:04 +02:00
|
|
|
err = -EINVAL;
|
2008-10-20 22:34:21 +02:00
|
|
|
len = qword_get(&mesg, buf, PAGE_SIZE);
|
|
|
|
if (len < 0)
|
2005-04-17 00:20:36 +02:00
|
|
|
goto out;
|
|
|
|
dprintk("Path seems to be <%s>\n", buf);
|
|
|
|
err = 0;
|
|
|
|
if (len == 0) {
|
|
|
|
set_bit(CACHE_NEGATIVE, &key.h.flags);
|
2006-03-27 11:15:04 +02:00
|
|
|
ek = svc_expkey_update(&key, ek);
|
2008-10-20 22:34:21 +02:00
|
|
|
if (!ek)
|
|
|
|
err = -ENOMEM;
|
2005-04-17 00:20:36 +02:00
|
|
|
} else {
|
2008-08-02 07:03:36 +02:00
|
|
|
err = kern_path(buf, 0, &key.ek_path);
|
2008-10-20 22:34:21 +02:00
|
|
|
if (err)
|
2005-04-17 00:20:36 +02:00
|
|
|
goto out;
|
|
|
|
|
|
|
|
dprintk("Found the path %s\n", buf);
|
2008-02-15 04:38:41 +01:00
|
|
|
|
2006-03-27 11:15:04 +02:00
|
|
|
ek = svc_expkey_update(&key, ek);
|
2008-10-20 22:34:21 +02:00
|
|
|
if (!ek)
|
2006-03-27 11:15:04 +02:00
|
|
|
err = -ENOMEM;
|
2008-08-02 07:03:36 +02:00
|
|
|
path_put(&key.ek_path);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
cache_flush();
|
|
|
|
out:
|
2008-10-20 22:34:21 +02:00
|
|
|
if (ek)
|
|
|
|
cache_put(&ek->h, &svc_expkey_cache);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (dom)
|
|
|
|
auth_domain_put(dom);
|
2005-11-07 10:01:34 +01:00
|
|
|
kfree(buf);
|
2005-04-17 00:20:36 +02:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int expkey_show(struct seq_file *m,
|
|
|
|
struct cache_detail *cd,
|
|
|
|
struct cache_head *h)
|
|
|
|
{
|
|
|
|
struct svc_expkey *ek ;
|
2007-02-14 09:33:12 +01:00
|
|
|
int i;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (h ==NULL) {
|
|
|
|
seq_puts(m, "#domain fsidtype fsid [path]\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
ek = container_of(h, struct svc_expkey, h);
|
2007-02-14 09:33:12 +01:00
|
|
|
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]);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (test_bit(CACHE_VALID, &h->flags) &&
|
|
|
|
!test_bit(CACHE_NEGATIVE, &h->flags)) {
|
|
|
|
seq_printf(m, " ");
|
2008-02-15 04:38:43 +01:00
|
|
|
seq_path(m, &ek->ek_path, "\\ \t\n");
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
seq_printf(m, "\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:04 +02:00
|
|
|
static inline int expkey_match (struct cache_head *a, struct cache_head *b)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-03-27 11:15:04 +02:00
|
|
|
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)
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:04 +02:00
|
|
|
static inline void expkey_init(struct cache_head *cnew,
|
|
|
|
struct cache_head *citem)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-03-27 11:15:04 +02:00
|
|
|
struct svc_expkey *new = container_of(cnew, struct svc_expkey, h);
|
|
|
|
struct svc_expkey *item = container_of(citem, struct svc_expkey, h);
|
|
|
|
|
2006-03-27 11:14:59 +02:00
|
|
|
kref_get(&item->ek_client->ref);
|
2005-04-17 00:20:36 +02:00
|
|
|
new->ek_client = item->ek_client;
|
|
|
|
new->ek_fsidtype = item->ek_fsidtype;
|
2007-02-14 09:33:12 +01:00
|
|
|
|
|
|
|
memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid));
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:04 +02:00
|
|
|
static inline void expkey_update(struct cache_head *cnew,
|
|
|
|
struct cache_head *citem)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-03-27 11:15:04 +02:00
|
|
|
struct svc_expkey *new = container_of(cnew, struct svc_expkey, h);
|
|
|
|
struct svc_expkey *item = container_of(citem, struct svc_expkey, h);
|
|
|
|
|
2008-02-15 04:38:41 +01:00
|
|
|
new->ek_path = item->ek_path;
|
|
|
|
path_get(&item->ek_path);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:04 +02:00
|
|
|
static struct cache_head *expkey_alloc(void)
|
|
|
|
{
|
|
|
|
struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL);
|
|
|
|
if (i)
|
|
|
|
return &i->h;
|
|
|
|
else
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:10 +02:00
|
|
|
static struct cache_detail svc_expkey_cache = {
|
2006-03-27 11:15:04 +02:00
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.hash_size = EXPKEY_HASHMAX,
|
|
|
|
.hash_table = expkey_table,
|
|
|
|
.name = "nfsd.fh",
|
|
|
|
.cache_put = expkey_put,
|
2009-08-09 21:14:29 +02:00
|
|
|
.cache_upcall = expkey_upcall,
|
2006-03-27 11:15:04 +02:00
|
|
|
.cache_parse = expkey_parse,
|
|
|
|
.cache_show = expkey_show,
|
|
|
|
.match = expkey_match,
|
|
|
|
.init = expkey_init,
|
|
|
|
.update = expkey_update,
|
|
|
|
.alloc = expkey_alloc,
|
|
|
|
};
|
|
|
|
|
2010-02-03 07:31:31 +01:00
|
|
|
static int
|
|
|
|
svc_expkey_hash(struct svc_expkey *item)
|
2006-03-27 11:15:04 +02:00
|
|
|
{
|
|
|
|
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);
|
|
|
|
hash &= EXPKEY_HASHMASK;
|
2010-02-03 07:31:31 +01:00
|
|
|
return hash;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct svc_expkey *
|
|
|
|
svc_expkey_lookup(struct svc_expkey *item)
|
|
|
|
{
|
|
|
|
struct cache_head *ch;
|
|
|
|
int hash = svc_expkey_hash(item);
|
2006-03-27 11:15:04 +02:00
|
|
|
|
|
|
|
ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h,
|
|
|
|
hash);
|
|
|
|
if (ch)
|
|
|
|
return container_of(ch, struct svc_expkey, h);
|
|
|
|
else
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct svc_expkey *
|
|
|
|
svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old)
|
|
|
|
{
|
|
|
|
struct cache_head *ch;
|
2010-02-03 07:31:31 +01:00
|
|
|
int hash = svc_expkey_hash(new);
|
2006-03-27 11:15:04 +02:00
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
#define EXPORT_HASHBITS 8
|
|
|
|
#define EXPORT_HASHMAX (1<< EXPORT_HASHBITS)
|
|
|
|
|
|
|
|
static struct cache_head *export_table[EXPORT_HASHMAX];
|
|
|
|
|
2006-10-04 11:16:18 +02:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:09 +02:00
|
|
|
static void svc_export_put(struct kref *ref)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-03-27 11:15:09 +02:00
|
|
|
struct svc_export *exp = container_of(ref, struct svc_export, h.ref);
|
2008-02-15 04:38:39 +01:00
|
|
|
path_put(&exp->ex_path);
|
2006-03-27 11:15:09 +02:00
|
|
|
auth_domain_put(exp->ex_client);
|
2008-02-15 04:38:39 +01:00
|
|
|
kfree(exp->ex_pathname);
|
2006-10-04 11:16:18 +02:00
|
|
|
nfsd4_fslocs_free(&exp->ex_fslocs);
|
2006-03-27 11:15:09 +02:00
|
|
|
kfree(exp);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void svc_export_request(struct cache_detail *cd,
|
|
|
|
struct cache_head *h,
|
|
|
|
char **bpp, int *blen)
|
|
|
|
{
|
|
|
|
/* client path */
|
|
|
|
struct svc_export *exp = container_of(h, struct svc_export, h);
|
|
|
|
char *pth;
|
|
|
|
|
|
|
|
qword_add(bpp, blen, exp->ex_client->name);
|
2008-02-15 04:38:44 +01:00
|
|
|
pth = d_path(&exp->ex_path, *bpp, *blen);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (IS_ERR(pth)) {
|
|
|
|
/* is this correct? */
|
|
|
|
(*bpp)[0] = '\n';
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
qword_add(bpp, blen, pth);
|
|
|
|
(*bpp)[-1] = '\n';
|
|
|
|
}
|
|
|
|
|
2009-08-09 21:14:29 +02:00
|
|
|
static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
|
|
|
|
{
|
|
|
|
return sunrpc_cache_pipe_upcall(cd, h, svc_export_request);
|
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:10 +02:00
|
|
|
static struct svc_export *svc_export_update(struct svc_export *new,
|
|
|
|
struct svc_export *old);
|
2006-03-27 11:15:03 +02:00
|
|
|
static struct svc_export *svc_export_lookup(struct svc_export *);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-12-14 02:21:48 +01:00
|
|
|
static int check_export(struct inode *inode, int *flags, unsigned char *uuid)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
|
2009-11-12 23:26:19 +01:00
|
|
|
/*
|
|
|
|
* We currently export only dirs, regular files, and (for v4
|
|
|
|
* pseudoroot) symlinks.
|
2005-04-17 00:20:36 +02:00
|
|
|
*/
|
|
|
|
if (!S_ISDIR(inode->i_mode) &&
|
2009-11-12 23:26:19 +01:00
|
|
|
!S_ISLNK(inode->i_mode) &&
|
2005-04-17 00:20:36 +02:00
|
|
|
!S_ISREG(inode->i_mode))
|
|
|
|
return -ENOTDIR;
|
|
|
|
|
2009-12-14 02:21:48 +01:00
|
|
|
/*
|
|
|
|
* Mountd should never pass down a writeable V4ROOT export, but,
|
|
|
|
* just to make sure:
|
|
|
|
*/
|
|
|
|
if (*flags & NFSEXP_V4ROOT)
|
|
|
|
*flags |= NFSEXP_READONLY;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/* 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)
|
2007-02-14 09:33:12 +01:00
|
|
|
* or an FSID number (so NFSEXP_FSID or ->uuid is needed).
|
2005-04-17 00:20:36 +02:00
|
|
|
* 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) &&
|
2009-12-14 02:21:48 +01:00
|
|
|
!(*flags & NFSEXP_FSID) &&
|
2007-02-14 09:33:12 +01:00
|
|
|
uuid == NULL) {
|
2006-10-02 11:17:41 +02:00
|
|
|
dprintk("exp_export: export of non-dev fs without fsid\n");
|
2005-04-17 00:20:36 +02:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
2007-10-22 01:42:16 +02:00
|
|
|
|
|
|
|
if (!inode->i_sb->s_export_op ||
|
|
|
|
!inode->i_sb->s_export_op->fh_to_dentry) {
|
2005-04-17 00:20:36 +02:00
|
|
|
dprintk("exp_export: export of invalid fs type.\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2006-10-04 11:16:18 +02:00
|
|
|
#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;
|
|
|
|
}
|
|
|
|
|
2007-07-17 13:04:42 +02:00
|
|
|
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;
|
|
|
|
/*
|
2009-04-21 16:08:39 +02:00
|
|
|
* 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.
|
2007-07-17 13:04:42 +02:00
|
|
|
*/
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2006-10-04 11:16:18 +02:00
|
|
|
#else /* CONFIG_NFSD_V4 */
|
2007-07-17 13:04:42 +02:00
|
|
|
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; }
|
2006-10-04 11:16:18 +02:00
|
|
|
#endif
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
|
|
|
|
{
|
|
|
|
/* client path expiry [flags anonuid anongid fsid] */
|
|
|
|
char *buf;
|
|
|
|
int len;
|
|
|
|
int err;
|
|
|
|
struct auth_domain *dom = NULL;
|
2008-08-02 07:01:02 +02:00
|
|
|
struct svc_export exp = {}, *expp;
|
2005-04-17 00:20:36 +02:00
|
|
|
int an_int;
|
|
|
|
|
|
|
|
if (mesg[mlen-1] != '\n')
|
|
|
|
return -EINVAL;
|
|
|
|
mesg[mlen-1] = 0;
|
|
|
|
|
|
|
|
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
|
2008-08-02 07:01:02 +02:00
|
|
|
if (!buf)
|
|
|
|
return -ENOMEM;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* client */
|
|
|
|
err = -EINVAL;
|
2008-08-02 07:01:02 +02:00
|
|
|
len = qword_get(&mesg, buf, PAGE_SIZE);
|
|
|
|
if (len <= 0)
|
|
|
|
goto out;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
err = -ENOENT;
|
|
|
|
dom = auth_domain_find(buf);
|
|
|
|
if (!dom)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
/* path */
|
|
|
|
err = -EINVAL;
|
2008-08-02 07:01:02 +02:00
|
|
|
if ((len = qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
|
|
|
|
goto out1;
|
|
|
|
|
|
|
|
err = kern_path(buf, 0, &exp.ex_path);
|
|
|
|
if (err)
|
|
|
|
goto out1;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
exp.ex_client = dom;
|
2008-08-02 07:01:02 +02:00
|
|
|
|
2006-10-04 11:16:17 +02:00
|
|
|
err = -ENOMEM;
|
2008-08-02 07:01:02 +02:00
|
|
|
exp.ex_pathname = kstrdup(buf, GFP_KERNEL);
|
2008-02-15 04:38:39 +01:00
|
|
|
if (!exp.ex_pathname)
|
2008-08-02 07:01:02 +02:00
|
|
|
goto out2;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* expiry */
|
|
|
|
err = -EINVAL;
|
|
|
|
exp.h.expiry_time = get_expiry(&mesg);
|
|
|
|
if (exp.h.expiry_time == 0)
|
2008-08-02 07:01:02 +02:00
|
|
|
goto out3;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* flags */
|
|
|
|
err = get_int(&mesg, &an_int);
|
2007-07-31 09:37:53 +02:00
|
|
|
if (err == -ENOENT) {
|
|
|
|
err = 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
set_bit(CACHE_NEGATIVE, &exp.h.flags);
|
2007-07-31 09:37:53 +02:00
|
|
|
} else {
|
2008-08-02 07:01:02 +02:00
|
|
|
if (err || an_int < 0)
|
|
|
|
goto out3;
|
2005-04-17 00:20:36 +02:00
|
|
|
exp.ex_flags= an_int;
|
|
|
|
|
|
|
|
/* anon uid */
|
|
|
|
err = get_int(&mesg, &an_int);
|
2008-08-02 07:01:02 +02:00
|
|
|
if (err)
|
|
|
|
goto out3;
|
2005-04-17 00:20:36 +02:00
|
|
|
exp.ex_anon_uid= an_int;
|
|
|
|
|
|
|
|
/* anon gid */
|
|
|
|
err = get_int(&mesg, &an_int);
|
2008-08-02 07:01:02 +02:00
|
|
|
if (err)
|
|
|
|
goto out3;
|
2005-04-17 00:20:36 +02:00
|
|
|
exp.ex_anon_gid= an_int;
|
|
|
|
|
|
|
|
/* fsid */
|
|
|
|
err = get_int(&mesg, &an_int);
|
2008-08-02 07:01:02 +02:00
|
|
|
if (err)
|
|
|
|
goto out3;
|
2005-04-17 00:20:36 +02:00
|
|
|
exp.ex_fsid = an_int;
|
|
|
|
|
2007-02-14 09:33:12 +01:00
|
|
|
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;
|
|
|
|
}
|
2007-07-17 13:04:42 +02:00
|
|
|
} else if (strcmp(buf, "secinfo") == 0)
|
|
|
|
err = secinfo_parse(&mesg, buf, &exp);
|
|
|
|
else
|
2007-02-14 09:33:12 +01:00
|
|
|
/* 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)
|
2008-08-02 07:01:02 +02:00
|
|
|
goto out4;
|
2007-02-14 09:33:12 +01:00
|
|
|
}
|
2006-10-04 11:16:18 +02:00
|
|
|
|
2009-12-14 02:21:48 +01:00
|
|
|
err = check_export(exp.ex_path.dentry->d_inode, &exp.ex_flags,
|
2007-02-14 09:33:12 +01:00
|
|
|
exp.ex_uuid);
|
2008-08-02 07:01:02 +02:00
|
|
|
if (err)
|
|
|
|
goto out4;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:03 +02:00
|
|
|
expp = svc_export_lookup(&exp);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (expp)
|
2006-03-27 11:15:03 +02:00
|
|
|
expp = svc_export_update(&exp, expp);
|
|
|
|
else
|
|
|
|
err = -ENOMEM;
|
2005-04-17 00:20:36 +02:00
|
|
|
cache_flush();
|
2006-03-27 11:15:03 +02:00
|
|
|
if (expp == NULL)
|
|
|
|
err = -ENOMEM;
|
|
|
|
else
|
|
|
|
exp_put(expp);
|
2008-08-02 07:01:02 +02:00
|
|
|
out4:
|
2007-02-14 09:33:12 +01:00
|
|
|
nfsd4_fslocs_free(&exp.ex_fslocs);
|
|
|
|
kfree(exp.ex_uuid);
|
2008-08-02 07:01:02 +02:00
|
|
|
out3:
|
2008-02-15 04:38:39 +01:00
|
|
|
kfree(exp.ex_pathname);
|
2008-08-02 07:01:02 +02:00
|
|
|
out2:
|
|
|
|
path_put(&exp.ex_path);
|
|
|
|
out1:
|
|
|
|
auth_domain_put(dom);
|
|
|
|
out:
|
2005-11-07 10:01:34 +01:00
|
|
|
kfree(buf);
|
2005-04-17 00:20:36 +02:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2006-10-04 11:16:18 +02:00
|
|
|
static void exp_flags(struct seq_file *m, int flag, int fsid,
|
|
|
|
uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs);
|
2007-07-17 13:04:49 +02:00
|
|
|
static void show_secinfo(struct seq_file *m, struct svc_export *exp);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
static int svc_export_show(struct seq_file *m,
|
|
|
|
struct cache_detail *cd,
|
|
|
|
struct cache_head *h)
|
|
|
|
{
|
|
|
|
struct svc_export *exp ;
|
|
|
|
|
|
|
|
if (h ==NULL) {
|
|
|
|
seq_puts(m, "#path domain(flags)\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
exp = container_of(h, struct svc_export, h);
|
2008-02-15 04:38:43 +01:00
|
|
|
seq_path(m, &exp->ex_path, " \t\n\\");
|
2005-04-17 00:20:36 +02:00
|
|
|
seq_putc(m, '\t');
|
|
|
|
seq_escape(m, exp->ex_client->name, " \t\n\\");
|
|
|
|
seq_putc(m, '(');
|
|
|
|
if (test_bit(CACHE_VALID, &h->flags) &&
|
2007-02-14 09:33:12 +01:00
|
|
|
!test_bit(CACHE_NEGATIVE, &h->flags)) {
|
2006-10-04 11:16:18 +02:00
|
|
|
exp_flags(m, exp->ex_flags, exp->ex_fsid,
|
|
|
|
exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs);
|
2007-02-14 09:33:12 +01:00
|
|
|
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]);
|
|
|
|
}
|
|
|
|
}
|
2007-07-17 13:04:49 +02:00
|
|
|
show_secinfo(m, exp);
|
2007-02-14 09:33:12 +01:00
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
seq_puts(m, ")\n");
|
|
|
|
return 0;
|
|
|
|
}
|
2006-03-27 11:15:03 +02:00
|
|
|
static int svc_export_match(struct cache_head *a, struct cache_head *b)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-03-27 11:15:03 +02:00
|
|
|
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 &&
|
2008-02-15 04:38:39 +01:00
|
|
|
orig->ex_path.dentry == new->ex_path.dentry &&
|
|
|
|
orig->ex_path.mnt == new->ex_path.mnt;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2006-03-27 11:15:03 +02:00
|
|
|
|
|
|
|
static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-03-27 11:15:03 +02:00
|
|
|
struct svc_export *new = container_of(cnew, struct svc_export, h);
|
|
|
|
struct svc_export *item = container_of(citem, struct svc_export, h);
|
|
|
|
|
2006-03-27 11:14:59 +02:00
|
|
|
kref_get(&item->ex_client->ref);
|
2005-04-17 00:20:36 +02:00
|
|
|
new->ex_client = item->ex_client;
|
2008-02-15 04:38:39 +01:00
|
|
|
new->ex_path.dentry = dget(item->ex_path.dentry);
|
|
|
|
new->ex_path.mnt = mntget(item->ex_path.mnt);
|
|
|
|
new->ex_pathname = NULL;
|
2006-10-04 11:16:18 +02:00
|
|
|
new->ex_fslocs.locations = NULL;
|
|
|
|
new->ex_fslocs.locations_count = 0;
|
|
|
|
new->ex_fslocs.migrated = 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:03 +02:00
|
|
|
static void export_update(struct cache_head *cnew, struct cache_head *citem)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-03-27 11:15:03 +02:00
|
|
|
struct svc_export *new = container_of(cnew, struct svc_export, h);
|
|
|
|
struct svc_export *item = container_of(citem, struct svc_export, h);
|
2007-07-17 13:04:42 +02:00
|
|
|
int i;
|
2006-03-27 11:15:03 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
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;
|
2007-02-14 09:33:12 +01:00
|
|
|
new->ex_uuid = item->ex_uuid;
|
|
|
|
item->ex_uuid = NULL;
|
2008-02-15 04:38:39 +01:00
|
|
|
new->ex_pathname = item->ex_pathname;
|
|
|
|
item->ex_pathname = NULL;
|
2006-10-04 11:16:18 +02:00
|
|
|
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;
|
2007-07-17 13:04:42 +02:00
|
|
|
new->ex_nflavors = item->ex_nflavors;
|
|
|
|
for (i = 0; i < MAX_SECINFO_LIST; i++) {
|
|
|
|
new->ex_flavors[i] = item->ex_flavors[i];
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:03 +02:00
|
|
|
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,
|
|
|
|
.hash_table = export_table,
|
|
|
|
.name = "nfsd.export",
|
|
|
|
.cache_put = svc_export_put,
|
2009-08-09 21:14:29 +02:00
|
|
|
.cache_upcall = svc_export_upcall,
|
2006-03-27 11:15:03 +02:00
|
|
|
.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,
|
|
|
|
};
|
|
|
|
|
2010-02-03 07:31:31 +01:00
|
|
|
static int
|
|
|
|
svc_export_hash(struct svc_export *exp)
|
2006-03-27 11:15:03 +02:00
|
|
|
{
|
|
|
|
int hash;
|
2010-02-03 07:31:31 +01:00
|
|
|
|
2006-03-27 11:15:03 +02:00
|
|
|
hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS);
|
2008-02-15 04:38:39 +01:00
|
|
|
hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS);
|
|
|
|
hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS);
|
2010-02-03 07:31:31 +01:00
|
|
|
return hash;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct svc_export *
|
|
|
|
svc_export_lookup(struct svc_export *exp)
|
|
|
|
{
|
|
|
|
struct cache_head *ch;
|
|
|
|
int hash = svc_export_hash(exp);
|
2006-03-27 11:15:03 +02:00
|
|
|
|
|
|
|
ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h,
|
|
|
|
hash);
|
|
|
|
if (ch)
|
|
|
|
return container_of(ch, struct svc_export, h);
|
|
|
|
else
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2006-03-27 11:15:10 +02:00
|
|
|
static struct svc_export *
|
2006-03-27 11:15:03 +02:00
|
|
|
svc_export_update(struct svc_export *new, struct svc_export *old)
|
|
|
|
{
|
|
|
|
struct cache_head *ch;
|
2010-02-03 07:31:31 +01:00
|
|
|
int hash = svc_export_hash(old);
|
2006-03-27 11:15:03 +02:00
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
|
2006-03-27 11:15:10 +02:00
|
|
|
static struct svc_expkey *
|
2005-04-17 00:20:36 +02:00
|
|
|
exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp)
|
|
|
|
{
|
|
|
|
struct svc_expkey key, *ek;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (!clp)
|
2007-07-17 13:04:40 +02:00
|
|
|
return ERR_PTR(-ENOENT);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
key.ek_client = clp;
|
|
|
|
key.ek_fsidtype = fsid_type;
|
|
|
|
memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
|
|
|
|
|
2006-03-27 11:15:04 +02:00
|
|
|
ek = svc_expkey_lookup(&key);
|
2007-07-17 13:04:40 +02:00
|
|
|
if (ek == NULL)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
err = cache_check(&svc_expkey_cache, &ek->h, reqp);
|
|
|
|
if (err)
|
|
|
|
return ERR_PTR(err);
|
2005-04-17 00:20:36 +02:00
|
|
|
return ek;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-04-18 08:04:46 +02:00
|
|
|
static svc_export *exp_get_by_name(svc_client *clp, const struct path *path,
|
|
|
|
struct cache_req *reqp)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct svc_export *exp, key;
|
2007-07-17 13:04:40 +02:00
|
|
|
int err;
|
2008-02-15 04:38:41 +01:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
if (!clp)
|
2007-07-17 13:04:40 +02:00
|
|
|
return ERR_PTR(-ENOENT);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
key.ex_client = clp;
|
2009-04-18 08:04:46 +02:00
|
|
|
key.ex_path = *path;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2006-03-27 11:15:03 +02:00
|
|
|
exp = svc_export_lookup(&key);
|
2007-07-17 13:04:40 +02:00
|
|
|
if (exp == NULL)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
err = cache_check(&svc_export_cache, &exp->h, reqp);
|
|
|
|
if (err)
|
|
|
|
return ERR_PTR(err);
|
2005-04-17 00:20:36 +02:00
|
|
|
return exp;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Find the export entry for a given dentry.
|
|
|
|
*/
|
2009-04-18 08:14:32 +02:00
|
|
|
static struct svc_export *exp_parent(svc_client *clp, struct path *path)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2009-04-18 08:14:32 +02:00
|
|
|
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);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2009-04-18 08:14:32 +02:00
|
|
|
dput(path->dentry);
|
|
|
|
path->dentry = saved;
|
2005-04-17 00:20:36 +02:00
|
|
|
return exp;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Obtain the root fh on behalf of a client.
|
|
|
|
* This could be done in user space, but I feel that it adds some safety
|
|
|
|
* since its harder to fool a kernel module than a user space program.
|
|
|
|
*/
|
|
|
|
int
|
2008-08-02 07:03:36 +02:00
|
|
|
exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct svc_export *exp;
|
2008-08-02 07:03:36 +02:00
|
|
|
struct path path;
|
2005-04-17 00:20:36 +02:00
|
|
|
struct inode *inode;
|
|
|
|
struct svc_fh fh;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = -EPERM;
|
|
|
|
/* NB: we probably ought to check that it's NUL-terminated */
|
2008-08-02 07:03:36 +02:00
|
|
|
if (kern_path(name, 0, &path)) {
|
|
|
|
printk("nfsd: exp_rootfh path not found %s", name);
|
2005-04-17 00:20:36 +02:00
|
|
|
return err;
|
|
|
|
}
|
2008-08-02 07:03:36 +02:00
|
|
|
inode = path.dentry->d_inode;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
|
2008-08-02 07:03:36 +02:00
|
|
|
name, path.dentry, clp->name,
|
2005-04-17 00:20:36 +02:00
|
|
|
inode->i_sb->s_id, inode->i_ino);
|
2009-04-18 08:14:32 +02:00
|
|
|
exp = exp_parent(clp, &path);
|
2006-12-13 09:35:21 +01:00
|
|
|
if (IS_ERR(exp)) {
|
|
|
|
err = PTR_ERR(exp);
|
|
|
|
goto out;
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* fh must be initialized before calling fh_compose
|
|
|
|
*/
|
|
|
|
fh_init(&fh, maxsize);
|
2008-08-02 07:03:36 +02:00
|
|
|
if (fh_compose(&fh, exp, path.dentry, NULL))
|
2005-04-17 00:20:36 +02:00
|
|
|
err = -EINVAL;
|
|
|
|
else
|
|
|
|
err = 0;
|
|
|
|
memcpy(f, &fh.fh_handle, sizeof(struct knfsd_fh));
|
|
|
|
fh_put(&fh);
|
|
|
|
exp_put(exp);
|
|
|
|
out:
|
2008-08-02 07:03:36 +02:00
|
|
|
path_put(&path);
|
2005-04-17 00:20:36 +02:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2007-10-16 10:27:52 +02:00
|
|
|
static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type,
|
|
|
|
u32 *fsidv, struct cache_req *reqp)
|
2006-03-27 11:15:00 +02:00
|
|
|
{
|
|
|
|
struct svc_export *exp;
|
|
|
|
struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp);
|
2007-07-17 13:04:40 +02:00
|
|
|
if (IS_ERR(ek))
|
2008-02-07 09:15:26 +01:00
|
|
|
return ERR_CAST(ek);
|
2006-03-27 11:15:00 +02:00
|
|
|
|
2009-04-18 08:04:46 +02:00
|
|
|
exp = exp_get_by_name(clp, &ek->ek_path, reqp);
|
2006-03-27 11:15:09 +02:00
|
|
|
cache_put(&ek->h, &svc_expkey_cache);
|
2006-03-27 11:15:00 +02:00
|
|
|
|
2007-07-17 13:04:40 +02:00
|
|
|
if (IS_ERR(exp))
|
2008-02-07 09:15:26 +01:00
|
|
|
return ERR_CAST(exp);
|
2006-03-27 11:15:00 +02:00
|
|
|
return exp;
|
|
|
|
}
|
|
|
|
|
2007-07-17 13:04:48 +02:00
|
|
|
__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;
|
|
|
|
}
|
|
|
|
|
2007-07-17 13:04:44 +02:00
|
|
|
/*
|
2007-07-17 13:04:46 +02:00
|
|
|
* 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.
|
|
|
|
*
|
2007-07-17 13:04:44 +02:00
|
|
|
* 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 *
|
2009-04-18 08:42:05 +02:00
|
|
|
rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path)
|
2007-07-17 13:04:44 +02:00
|
|
|
{
|
2007-07-19 10:49:18 +02:00
|
|
|
struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
|
2007-07-17 13:04:46 +02:00
|
|
|
|
|
|
|
if (rqstp->rq_client == NULL)
|
|
|
|
goto gss;
|
knfsd: nfsd: set rq_client to ip-address-determined-domain
We want it to be possible for users to restrict exports both by IP address and
by pseudoflavor. The pseudoflavor information has previously been passed
using special auth_domains stored in the rq_client field. After the preceding
patch that stored the pseudoflavor in rq_pflavor, that's now superfluous; so
now we use rq_client for the ip information, as auth_null and auth_unix do.
However, we keep around the special auth_domain in the rq_gssclient field for
backwards compatibility purposes, so we can still do upcalls using the old
"gss/pseudoflavor" auth_domain if upcalls using the unix domain to give us an
appropriate export. This allows us to continue supporting old mountd.
In fact, for this first patch, we always use the "gss/pseudoflavor"
auth_domain (and only it) if it is available; thus rq_client is ignored in the
auth_gss case, and this patch on its own makes no change in behavior; that
will be left to later patches.
Note on idmap: I'm almost tempted to just replace the auth_domain in the idmap
upcall by a dummy value--no version of idmapd has ever used it, and it's
unlikely anyone really wants to perform idmapping differently depending on the
where the client is (they may want to perform *credential* mapping
differently, but that's a different matter--the idmapper just handles id's
used in getattr and setattr). But I'm updating the idmapd code anyway, just
out of general backwards-compatibility paranoia.
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 13:04:46 +02:00
|
|
|
|
2007-07-17 13:04:46 +02:00
|
|
|
/* First try the auth_unix client: */
|
2009-04-18 08:42:05 +02:00
|
|
|
exp = exp_get_by_name(rqstp->rq_client, path, &rqstp->rq_chandle);
|
2007-07-17 13:04:46 +02:00
|
|
|
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;
|
2009-04-18 08:42:05 +02:00
|
|
|
gssexp = exp_get_by_name(rqstp->rq_gssclient, path, &rqstp->rq_chandle);
|
2007-07-17 13:04:46 +02:00
|
|
|
if (PTR_ERR(gssexp) == -ENOENT)
|
|
|
|
return exp;
|
2007-07-19 10:49:18 +02:00
|
|
|
if (!IS_ERR(exp))
|
2007-07-17 13:04:46 +02:00
|
|
|
exp_put(exp);
|
|
|
|
return gssexp;
|
2007-07-17 13:04:44 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
struct svc_export *
|
|
|
|
rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
|
|
|
|
{
|
2007-07-19 10:49:18 +02:00
|
|
|
struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
|
2007-07-17 13:04:46 +02:00
|
|
|
|
|
|
|
if (rqstp->rq_client == NULL)
|
|
|
|
goto gss;
|
knfsd: nfsd: set rq_client to ip-address-determined-domain
We want it to be possible for users to restrict exports both by IP address and
by pseudoflavor. The pseudoflavor information has previously been passed
using special auth_domains stored in the rq_client field. After the preceding
patch that stored the pseudoflavor in rq_pflavor, that's now superfluous; so
now we use rq_client for the ip information, as auth_null and auth_unix do.
However, we keep around the special auth_domain in the rq_gssclient field for
backwards compatibility purposes, so we can still do upcalls using the old
"gss/pseudoflavor" auth_domain if upcalls using the unix domain to give us an
appropriate export. This allows us to continue supporting old mountd.
In fact, for this first patch, we always use the "gss/pseudoflavor"
auth_domain (and only it) if it is available; thus rq_client is ignored in the
auth_gss case, and this patch on its own makes no change in behavior; that
will be left to later patches.
Note on idmap: I'm almost tempted to just replace the auth_domain in the idmap
upcall by a dummy value--no version of idmapd has ever used it, and it's
unlikely anyone really wants to perform idmapping differently depending on the
where the client is (they may want to perform *credential* mapping
differently, but that's a different matter--the idmapper just handles id's
used in getattr and setattr). But I'm updating the idmapd code anyway, just
out of general backwards-compatibility paranoia.
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 13:04:46 +02:00
|
|
|
|
2007-07-17 13:04:46 +02:00
|
|
|
/* 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;
|
2007-07-19 10:49:18 +02:00
|
|
|
if (!IS_ERR(exp))
|
2007-07-17 13:04:46 +02:00
|
|
|
exp_put(exp);
|
|
|
|
return gssexp;
|
2007-07-17 13:04:44 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
struct svc_export *
|
2009-04-18 09:00:46 +02:00
|
|
|
rqst_exp_parent(struct svc_rqst *rqstp, struct path *path)
|
2007-07-17 13:04:44 +02:00
|
|
|
{
|
2009-04-18 09:00:46 +02:00
|
|
|
struct dentry *saved = dget(path->dentry);
|
|
|
|
struct svc_export *exp = rqst_exp_get_by_name(rqstp, path);
|
2007-07-17 13:04:46 +02:00
|
|
|
|
2009-04-18 09:00:46 +02:00
|
|
|
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);
|
2007-07-17 13:04:46 +02:00
|
|
|
}
|
2009-04-18 09:00:46 +02:00
|
|
|
dput(path->dentry);
|
|
|
|
path->dentry = saved;
|
2007-07-17 13:04:46 +02:00
|
|
|
return exp;
|
2007-07-17 13:04:44 +02:00
|
|
|
}
|
2006-03-27 11:15:00 +02:00
|
|
|
|
2009-09-27 20:41:43 +02:00
|
|
|
static struct svc_export *find_fsidzero_export(struct svc_rqst *rqstp)
|
|
|
|
{
|
|
|
|
u32 fsidv[2];
|
|
|
|
|
|
|
|
mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL);
|
|
|
|
|
2010-02-08 19:42:26 +01:00
|
|
|
return rqst_exp_find(rqstp, FSID_NUM, fsidv);
|
2009-09-27 20:41:43 +02:00
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* 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
|
|
|
|
*/
|
2006-10-20 08:29:02 +02:00
|
|
|
__be32
|
2007-07-17 13:04:43 +02:00
|
|
|
exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-03-27 11:15:00 +02:00
|
|
|
struct svc_export *exp;
|
2006-10-20 08:29:02 +02:00
|
|
|
__be32 rv;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-09-27 20:41:43 +02:00
|
|
|
exp = find_fsidzero_export(rqstp);
|
2006-12-13 09:35:23 +01:00
|
|
|
if (IS_ERR(exp))
|
|
|
|
return nfserrno(PTR_ERR(exp));
|
2008-02-15 04:38:39 +01:00
|
|
|
rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL);
|
2006-10-04 11:16:10 +02:00
|
|
|
exp_put(exp);
|
2005-04-17 00:20:36 +02:00
|
|
|
return rv;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Iterator */
|
|
|
|
|
|
|
|
static void *e_start(struct seq_file *m, loff_t *pos)
|
2006-10-02 11:17:50 +02:00
|
|
|
__acquires(svc_export_cache.hash_lock)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
loff_t n = *pos;
|
|
|
|
unsigned hash, export;
|
|
|
|
struct cache_head *ch;
|
|
|
|
|
|
|
|
read_lock(&svc_export_cache.hash_lock);
|
|
|
|
if (!n--)
|
2006-10-02 11:17:49 +02:00
|
|
|
return SEQ_START_TOKEN;
|
2005-04-17 00:20:36 +02:00
|
|
|
hash = n >> 32;
|
|
|
|
export = n & ((1LL<<32) - 1);
|
|
|
|
|
|
|
|
|
|
|
|
for (ch=export_table[hash]; ch; ch=ch->next)
|
|
|
|
if (!export--)
|
|
|
|
return ch;
|
|
|
|
n &= ~((1LL<<32) - 1);
|
|
|
|
do {
|
|
|
|
hash++;
|
|
|
|
n += 1LL<<32;
|
|
|
|
} while(hash < EXPORT_HASHMAX && export_table[hash]==NULL);
|
|
|
|
if (hash >= EXPORT_HASHMAX)
|
|
|
|
return NULL;
|
|
|
|
*pos = n+1;
|
|
|
|
return export_table[hash];
|
|
|
|
}
|
|
|
|
|
|
|
|
static void *e_next(struct seq_file *m, void *p, loff_t *pos)
|
|
|
|
{
|
|
|
|
struct cache_head *ch = p;
|
|
|
|
int hash = (*pos >> 32);
|
|
|
|
|
2006-10-02 11:17:49 +02:00
|
|
|
if (p == SEQ_START_TOKEN)
|
2005-04-17 00:20:36 +02:00
|
|
|
hash = 0;
|
|
|
|
else if (ch->next == NULL) {
|
|
|
|
hash++;
|
|
|
|
*pos += 1LL<<32;
|
|
|
|
} else {
|
|
|
|
++*pos;
|
|
|
|
return ch->next;
|
|
|
|
}
|
|
|
|
*pos &= ~((1LL<<32) - 1);
|
|
|
|
while (hash < EXPORT_HASHMAX && export_table[hash] == NULL) {
|
|
|
|
hash++;
|
|
|
|
*pos += 1LL<<32;
|
|
|
|
}
|
|
|
|
if (hash >= EXPORT_HASHMAX)
|
|
|
|
return NULL;
|
|
|
|
++*pos;
|
|
|
|
return export_table[hash];
|
|
|
|
}
|
|
|
|
|
|
|
|
static void e_stop(struct seq_file *m, void *p)
|
2006-10-02 11:17:50 +02:00
|
|
|
__releases(svc_export_cache.hash_lock)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
read_unlock(&svc_export_cache.hash_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct flags {
|
|
|
|
int flag;
|
|
|
|
char *name[2];
|
|
|
|
} expflags[] = {
|
|
|
|
{ NFSEXP_READONLY, {"ro", "rw"}},
|
|
|
|
{ NFSEXP_INSECURE_PORT, {"insecure", ""}},
|
|
|
|
{ NFSEXP_ROOTSQUASH, {"root_squash", "no_root_squash"}},
|
|
|
|
{ NFSEXP_ALLSQUASH, {"all_squash", ""}},
|
|
|
|
{ NFSEXP_ASYNC, {"async", "sync"}},
|
|
|
|
{ NFSEXP_GATHERED_WRITES, {"wdelay", "no_wdelay"}},
|
|
|
|
{ NFSEXP_NOHIDE, {"nohide", ""}},
|
|
|
|
{ NFSEXP_CROSSMOUNT, {"crossmnt", ""}},
|
|
|
|
{ NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}},
|
|
|
|
{ NFSEXP_NOAUTHNLM, {"insecure_locks", ""}},
|
nfsd: introduce export flag for v4 pseudoroot
NFSv4 differs from v2 and v3 in that it presents a single unified
filesystem tree, whereas v2 and v3 exported multiple filesystem (whose
roots could be found using a separate mount protocol).
Our original NFSv4 server implementation asked the administrator to
designate a single filesystem as the NFSv4 root, then to mount
filesystems they wished to export underneath. (Often using bind mounts
of already-existing filesystems.)
This was conceptually simple, and allowed easy implementation, but
created a serious obstacle to upgrading between v2/v3: since the paths
to v4 filesystems were different, administrators would have to adjust
all the paths in client-side mount commands when switching to v4.
Various workarounds are possible. For example, the administrator could
export "/" and designate it as the v4 root. However, the security risks
of that approach are obvious, and in any case we shouldn't be requiring
the administrator to take extra steps to fix this problem; instead, the
server should present consistent paths across different versions by
default.
These patches take a modified version of that approach: we provide a new
export option which exports only a subset of a filesystem. With this
flag, it becomes safe for mountd to export "/" by default, with no need
for additional configuration.
We begin just by defining the new flag.
Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-09 20:58:22 +02:00
|
|
|
{ NFSEXP_V4ROOT, {"v4root", ""}},
|
2005-04-17 00:20:36 +02:00
|
|
|
{ 0, {"", ""}}
|
|
|
|
};
|
|
|
|
|
2007-07-17 13:04:49 +02:00
|
|
|
static void show_expflags(struct seq_file *m, int flags, int mask)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct flags *flg;
|
2007-07-17 13:04:49 +02:00
|
|
|
int state, first = 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
for (flg = expflags; flg->flag; flg++) {
|
2007-07-17 13:04:49 +02:00
|
|
|
if (flg->flag & ~mask)
|
|
|
|
continue;
|
|
|
|
state = (flg->flag & flags) ? 0 : 1;
|
2005-04-17 00:20:36 +02:00
|
|
|
if (*flg->name[state])
|
|
|
|
seq_printf(m, "%s%s", first++?",":"", flg->name[state]);
|
|
|
|
}
|
2007-07-17 13:04:49 +02:00
|
|
|
}
|
|
|
|
|
2007-07-17 13:04:49 +02:00
|
|
|
static void show_secinfo_flags(struct seq_file *m, int flags)
|
|
|
|
{
|
|
|
|
seq_printf(m, ",");
|
|
|
|
show_expflags(m, flags, NFSEXP_SECINFO_FLAGS);
|
|
|
|
}
|
|
|
|
|
2010-09-24 23:43:59 +02:00
|
|
|
static bool secinfo_flags_equal(int f, int g)
|
|
|
|
{
|
|
|
|
f &= NFSEXP_SECINFO_FLAGS;
|
|
|
|
g &= NFSEXP_SECINFO_FLAGS;
|
|
|
|
return f == g;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int show_secinfo_run(struct seq_file *m, struct exp_flavor_info **fp, struct exp_flavor_info *end)
|
|
|
|
{
|
|
|
|
int flags;
|
|
|
|
|
|
|
|
flags = (*fp)->flags;
|
|
|
|
seq_printf(m, ",sec=%d", (*fp)->pseudoflavor);
|
|
|
|
(*fp)++;
|
|
|
|
while (*fp != end && secinfo_flags_equal(flags, (*fp)->flags)) {
|
|
|
|
seq_printf(m, ":%d", (*fp)->pseudoflavor);
|
|
|
|
(*fp)++;
|
|
|
|
}
|
|
|
|
return flags;
|
|
|
|
}
|
|
|
|
|
2007-07-17 13:04:49 +02:00
|
|
|
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;
|
2010-09-24 23:43:59 +02:00
|
|
|
int flags;
|
2007-07-17 13:04:49 +02:00
|
|
|
|
|
|
|
if (exp->ex_nflavors == 0)
|
|
|
|
return;
|
2010-09-24 23:43:59 +02:00
|
|
|
f = exp->ex_flavors;
|
|
|
|
flags = show_secinfo_run(m, &f, end);
|
|
|
|
if (!secinfo_flags_equal(flags, exp->ex_flags))
|
|
|
|
show_secinfo_flags(m, flags);
|
|
|
|
while (f != end) {
|
|
|
|
flags = show_secinfo_run(m, &f, end);
|
|
|
|
show_secinfo_flags(m, flags);
|
2007-07-17 13:04:49 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-07-17 13:04:49 +02:00
|
|
|
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);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (flag & NFSEXP_FSID)
|
2007-07-17 13:04:49 +02:00
|
|
|
seq_printf(m, ",fsid=%d", fsid);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (anonu != (uid_t)-2 && anonu != (0x10000-2))
|
2007-07-21 13:37:30 +02:00
|
|
|
seq_printf(m, ",anonuid=%u", anonu);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (anong != (gid_t)-2 && anong != (0x10000-2))
|
2007-07-21 13:37:30 +02:00
|
|
|
seq_printf(m, ",anongid=%u", anong);
|
2006-10-04 11:16:18 +02:00
|
|
|
if (fsloc && fsloc->locations_count > 0) {
|
|
|
|
char *loctype = (fsloc->migrated) ? "refer" : "replicas";
|
|
|
|
int i;
|
|
|
|
|
2007-07-17 13:04:49 +02:00
|
|
|
seq_printf(m, ",%s=", loctype);
|
2006-10-04 11:16:18 +02:00
|
|
|
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\\");
|
|
|
|
}
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
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);
|
|
|
|
|
2006-10-02 11:17:49 +02:00
|
|
|
if (p == SEQ_START_TOKEN) {
|
2005-04-17 00:20:36 +02:00
|
|
|
seq_puts(m, "# Version 1.1\n");
|
|
|
|
seq_puts(m, "# Path Client(Flags) # IPs\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
cache_get(&exp->h);
|
|
|
|
if (cache_check(&svc_export_cache, &exp->h, NULL))
|
|
|
|
return 0;
|
2006-03-27 11:15:09 +02:00
|
|
|
cache_put(&exp->h, &svc_export_cache);
|
2005-04-17 00:20:36 +02:00
|
|
|
return svc_export_show(m, &svc_export_cache, cp);
|
|
|
|
}
|
|
|
|
|
2009-09-23 01:43:43 +02:00
|
|
|
const struct seq_operations nfs_exports_op = {
|
2005-04-17 00:20:36 +02:00
|
|
|
.start = e_start,
|
|
|
|
.next = e_next,
|
|
|
|
.stop = e_stop,
|
|
|
|
.show = e_show,
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize the exports module.
|
|
|
|
*/
|
2007-11-08 23:20:34 +01:00
|
|
|
int
|
2005-04-17 00:20:36 +02:00
|
|
|
nfsd_export_init(void)
|
|
|
|
{
|
2007-11-08 23:20:34 +01:00
|
|
|
int rv;
|
2005-04-17 00:20:36 +02:00
|
|
|
dprintk("nfsd: initializing export module.\n");
|
|
|
|
|
2007-11-08 23:20:34 +01:00
|
|
|
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;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Flush exports table - called when last nfsd thread is killed
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
nfsd_export_flush(void)
|
|
|
|
{
|
|
|
|
cache_purge(&svc_expkey_cache);
|
|
|
|
cache_purge(&svc_export_cache);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Shutdown the exports module.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
nfsd_export_shutdown(void)
|
|
|
|
{
|
|
|
|
|
|
|
|
dprintk("nfsd: shutting down export module.\n");
|
|
|
|
|
2007-11-08 22:09:59 +01:00
|
|
|
cache_unregister(&svc_expkey_cache);
|
|
|
|
cache_unregister(&svc_export_cache);
|
2005-04-17 00:20:36 +02:00
|
|
|
svcauth_unix_purge();
|
|
|
|
|
|
|
|
dprintk("nfsd: export shutdown complete.\n");
|
|
|
|
}
|