NFS: Store the legacy idmapper result in the keyring
This patch removes the old hashmap-based caching and instead uses a "request key actor" to place an upcall to the legacy idmapper rather than going through /sbin/request-key. This will only be used as a fallback if /etc/request-key.conf isn't configured to use nfsidmap. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker
Trond Myklebust
parent
59e6b9c113
commit
57e62324e4
582
fs/nfs/idmap.c
582
fs/nfs/idmap.c
@ -34,42 +34,28 @@
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/parser.h>
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#include <linux/fs.h>
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#include <linux/nfs_idmap.h>
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#include <linux/nfs_fs.h>
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#include <linux/cred.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/nfs4.h>
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#include <linux/nfs_fs_sb.h>
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#include <linux/keyctl.h>
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#include <linux/key-type.h>
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#include <linux/rcupdate.h>
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#include <linux/err.h>
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#include <keys/user-type.h>
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/* include files needed by legacy idmapper */
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/init.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/sched.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/workqueue.h>
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#include <net/net_namespace.h>
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#include <linux/sunrpc/rpc_pipe_fs.h>
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#include <linux/nfs_fs.h>
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#include "nfs4_fs.h"
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#include <linux/nfs_fs_sb.h>
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#include <linux/key.h>
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#include <linux/keyctl.h>
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#include <linux/key-type.h>
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#include <keys/user-type.h>
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#include <linux/module.h>
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#include "internal.h"
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#include "netns.h"
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#define NFS_UINT_MAXLEN 11
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#define IDMAP_HASH_SZ 128
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/* Default cache timeout is 10 minutes */
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unsigned int nfs_idmap_cache_timeout = 600 * HZ;
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unsigned int nfs_idmap_cache_timeout = 600;
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const struct cred *id_resolver_cache;
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struct key_type key_type_id_resolver_legacy;
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/**
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@ -261,8 +247,10 @@ static ssize_t nfs_idmap_get_desc(const char *name, size_t namelen,
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return desclen;
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}
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static ssize_t nfs_idmap_request_key(const char *name, size_t namelen,
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const char *type, void *data, size_t data_size)
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static ssize_t nfs_idmap_request_key(struct key_type *key_type,
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const char *name, size_t namelen,
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const char *type, void *data,
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size_t data_size, struct idmap *idmap)
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{
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const struct cred *saved_cred;
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struct key *rkey;
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@ -275,8 +263,12 @@ static ssize_t nfs_idmap_request_key(const char *name, size_t namelen,
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goto out;
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saved_cred = override_creds(id_resolver_cache);
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rkey = request_key(&key_type_id_resolver, desc, "");
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if (idmap)
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rkey = request_key_with_auxdata(key_type, desc, "", 0, idmap);
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else
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rkey = request_key(&key_type_id_resolver, desc, "");
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revert_creds(saved_cred);
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kfree(desc);
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if (IS_ERR(rkey)) {
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ret = PTR_ERR(rkey);
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@ -309,31 +301,46 @@ static ssize_t nfs_idmap_request_key(const char *name, size_t namelen,
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return ret;
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}
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static ssize_t nfs_idmap_get_key(const char *name, size_t namelen,
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const char *type, void *data,
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size_t data_size, struct idmap *idmap)
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{
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ssize_t ret = nfs_idmap_request_key(&key_type_id_resolver,
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name, namelen, type, data,
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data_size, NULL);
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if (ret < 0) {
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ret = nfs_idmap_request_key(&key_type_id_resolver_legacy,
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name, namelen, type, data,
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data_size, idmap);
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}
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return ret;
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}
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/* ID -> Name */
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static ssize_t nfs_idmap_lookup_name(__u32 id, const char *type, char *buf, size_t buflen)
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static ssize_t nfs_idmap_lookup_name(__u32 id, const char *type, char *buf,
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size_t buflen, struct idmap *idmap)
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{
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char id_str[NFS_UINT_MAXLEN];
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int id_len;
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ssize_t ret;
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id_len = snprintf(id_str, sizeof(id_str), "%u", id);
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ret = nfs_idmap_request_key(id_str, id_len, type, buf, buflen);
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ret = nfs_idmap_get_key(id_str, id_len, type, buf, buflen, idmap);
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if (ret < 0)
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return -EINVAL;
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return ret;
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}
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/* Name -> ID */
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static int nfs_idmap_lookup_id(const char *name, size_t namelen,
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const char *type, __u32 *id)
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static int nfs_idmap_lookup_id(const char *name, size_t namelen, const char *type,
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__u32 *id, struct idmap *idmap)
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{
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char id_str[NFS_UINT_MAXLEN];
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long id_long;
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ssize_t data_size;
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int ret = 0;
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data_size = nfs_idmap_request_key(name, namelen, type, id_str, NFS_UINT_MAXLEN);
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data_size = nfs_idmap_get_key(name, namelen, type, id_str, NFS_UINT_MAXLEN, idmap);
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if (data_size <= 0) {
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ret = -EINVAL;
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} else {
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@ -344,54 +351,47 @@ static int nfs_idmap_lookup_id(const char *name, size_t namelen,
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}
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/* idmap classic begins here */
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static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
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{
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char *endp;
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int num = simple_strtol(val, &endp, 0);
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int jif = num * HZ;
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if (endp == val || *endp || num < 0 || jif < num)
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return -EINVAL;
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*((int *)kp->arg) = jif;
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return 0;
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}
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module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
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&nfs_idmap_cache_timeout, 0644);
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struct idmap_hashent {
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unsigned long ih_expires;
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__u32 ih_id;
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size_t ih_namelen;
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const char *ih_name;
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};
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struct idmap_hashtable {
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__u8 h_type;
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struct idmap_hashent *h_entries;
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};
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module_param(nfs_idmap_cache_timeout, int, 0644);
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struct idmap {
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struct rpc_pipe *idmap_pipe;
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wait_queue_head_t idmap_wq;
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struct idmap_msg idmap_im;
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struct mutex idmap_lock; /* Serializes upcalls */
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struct mutex idmap_im_lock; /* Protects the hashtable */
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struct idmap_hashtable idmap_user_hash;
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struct idmap_hashtable idmap_group_hash;
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struct key_construction *idmap_key_cons;
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};
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enum {
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Opt_find_uid, Opt_find_gid, Opt_find_user, Opt_find_group, Opt_find_err
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};
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static const match_table_t nfs_idmap_tokens = {
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{ Opt_find_uid, "uid:%s" },
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{ Opt_find_gid, "gid:%s" },
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{ Opt_find_user, "user:%s" },
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{ Opt_find_group, "group:%s" },
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{ Opt_find_err, NULL }
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};
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static int nfs_idmap_legacy_upcall(struct key_construction *, const char *, void *);
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static ssize_t idmap_pipe_downcall(struct file *, const char __user *,
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size_t);
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static void idmap_pipe_destroy_msg(struct rpc_pipe_msg *);
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static unsigned int fnvhash32(const void *, size_t);
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static const struct rpc_pipe_ops idmap_upcall_ops = {
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.upcall = rpc_pipe_generic_upcall,
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.downcall = idmap_pipe_downcall,
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.destroy_msg = idmap_pipe_destroy_msg,
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};
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struct key_type key_type_id_resolver_legacy = {
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.name = "id_resolver",
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.instantiate = user_instantiate,
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.match = user_match,
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.revoke = user_revoke,
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.destroy = user_destroy,
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.describe = user_describe,
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.read = user_read,
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.request_key = nfs_idmap_legacy_upcall,
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};
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static void __nfs_idmap_unregister(struct rpc_pipe *pipe)
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{
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if (pipe->dentry)
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@ -468,38 +468,11 @@ nfs_idmap_new(struct nfs_client *clp)
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return error;
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}
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idmap->idmap_pipe = pipe;
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mutex_init(&idmap->idmap_lock);
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mutex_init(&idmap->idmap_im_lock);
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init_waitqueue_head(&idmap->idmap_wq);
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idmap->idmap_user_hash.h_type = IDMAP_TYPE_USER;
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idmap->idmap_group_hash.h_type = IDMAP_TYPE_GROUP;
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clp->cl_idmap = idmap;
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return 0;
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}
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static void
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idmap_alloc_hashtable(struct idmap_hashtable *h)
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{
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if (h->h_entries != NULL)
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return;
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h->h_entries = kcalloc(IDMAP_HASH_SZ,
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sizeof(*h->h_entries),
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GFP_KERNEL);
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}
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static void
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idmap_free_hashtable(struct idmap_hashtable *h)
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{
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int i;
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if (h->h_entries == NULL)
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return;
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for (i = 0; i < IDMAP_HASH_SZ; i++)
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kfree(h->h_entries[i].ih_name);
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kfree(h->h_entries);
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}
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void
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nfs_idmap_delete(struct nfs_client *clp)
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{
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@ -510,8 +483,6 @@ nfs_idmap_delete(struct nfs_client *clp)
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nfs_idmap_unregister(clp, idmap->idmap_pipe);
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rpc_destroy_pipe_data(idmap->idmap_pipe);
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clp->cl_idmap = NULL;
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idmap_free_hashtable(&idmap->idmap_user_hash);
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idmap_free_hashtable(&idmap->idmap_group_hash);
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kfree(idmap);
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}
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@ -617,222 +588,107 @@ void nfs_idmap_quit(void)
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nfs_idmap_quit_keyring();
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}
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/*
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* Helper routines for manipulating the hashtable
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*/
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static inline struct idmap_hashent *
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idmap_name_hash(struct idmap_hashtable* h, const char *name, size_t len)
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static int nfs_idmap_prepare_message(char *desc, struct idmap_msg *im,
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struct rpc_pipe_msg *msg)
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{
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if (h->h_entries == NULL)
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return NULL;
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return &h->h_entries[fnvhash32(name, len) % IDMAP_HASH_SZ];
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}
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substring_t substr;
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int token, ret;
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static struct idmap_hashent *
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idmap_lookup_name(struct idmap_hashtable *h, const char *name, size_t len)
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{
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struct idmap_hashent *he = idmap_name_hash(h, name, len);
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memset(im, 0, sizeof(*im));
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memset(msg, 0, sizeof(*msg));
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if (he == NULL)
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return NULL;
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if (he->ih_namelen != len || memcmp(he->ih_name, name, len) != 0)
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return NULL;
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if (time_after(jiffies, he->ih_expires))
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return NULL;
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return he;
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}
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im->im_type = IDMAP_TYPE_GROUP;
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token = match_token(desc, nfs_idmap_tokens, &substr);
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static inline struct idmap_hashent *
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idmap_id_hash(struct idmap_hashtable* h, __u32 id)
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{
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if (h->h_entries == NULL)
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return NULL;
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return &h->h_entries[fnvhash32(&id, sizeof(id)) % IDMAP_HASH_SZ];
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}
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switch (token) {
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case Opt_find_uid:
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im->im_type = IDMAP_TYPE_USER;
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case Opt_find_gid:
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im->im_conv = IDMAP_CONV_NAMETOID;
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ret = match_strlcpy(im->im_name, &substr, IDMAP_NAMESZ);
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break;
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static struct idmap_hashent *
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idmap_lookup_id(struct idmap_hashtable *h, __u32 id)
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{
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struct idmap_hashent *he = idmap_id_hash(h, id);
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case Opt_find_user:
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im->im_type = IDMAP_TYPE_USER;
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case Opt_find_group:
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im->im_conv = IDMAP_CONV_IDTONAME;
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ret = match_int(&substr, &im->im_id);
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break;
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if (he == NULL)
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return NULL;
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if (he->ih_id != id || he->ih_namelen == 0)
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return NULL;
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if (time_after(jiffies, he->ih_expires))
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return NULL;
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return he;
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}
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/*
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* Routines for allocating new entries in the hashtable.
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* For now, we just have 1 entry per bucket, so it's all
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* pretty trivial.
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*/
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static inline struct idmap_hashent *
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idmap_alloc_name(struct idmap_hashtable *h, char *name, size_t len)
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{
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idmap_alloc_hashtable(h);
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return idmap_name_hash(h, name, len);
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}
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static inline struct idmap_hashent *
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idmap_alloc_id(struct idmap_hashtable *h, __u32 id)
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{
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idmap_alloc_hashtable(h);
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return idmap_id_hash(h, id);
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}
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static void
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idmap_update_entry(struct idmap_hashent *he, const char *name,
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size_t namelen, __u32 id)
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{
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char *str = kmalloc(namelen + 1, GFP_KERNEL);
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if (str == NULL)
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return;
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kfree(he->ih_name);
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he->ih_id = id;
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memcpy(str, name, namelen);
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str[namelen] = '\0';
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he->ih_name = str;
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he->ih_namelen = namelen;
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he->ih_expires = jiffies + nfs_idmap_cache_timeout;
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}
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/*
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* Name -> ID
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*/
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static int
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nfs_idmap_id(struct idmap *idmap, struct idmap_hashtable *h,
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const char *name, size_t namelen, __u32 *id)
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{
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struct rpc_pipe_msg msg;
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struct idmap_msg *im;
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struct idmap_hashent *he;
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DECLARE_WAITQUEUE(wq, current);
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int ret = -EIO;
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im = &idmap->idmap_im;
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/*
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* String sanity checks
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* Note that the userland daemon expects NUL terminated strings
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*/
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for (;;) {
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if (namelen == 0)
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return -EINVAL;
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if (name[namelen-1] != '\0')
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break;
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namelen--;
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}
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if (namelen >= IDMAP_NAMESZ)
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return -EINVAL;
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mutex_lock(&idmap->idmap_lock);
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mutex_lock(&idmap->idmap_im_lock);
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he = idmap_lookup_name(h, name, namelen);
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if (he != NULL) {
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*id = he->ih_id;
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ret = 0;
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default:
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ret = -EINVAL;
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goto out;
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}
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memset(im, 0, sizeof(*im));
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memcpy(im->im_name, name, namelen);
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msg->data = im;
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msg->len = sizeof(struct idmap_msg);
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im->im_type = h->h_type;
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im->im_conv = IDMAP_CONV_NAMETOID;
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memset(&msg, 0, sizeof(msg));
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msg.data = im;
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msg.len = sizeof(*im);
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add_wait_queue(&idmap->idmap_wq, &wq);
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if (rpc_queue_upcall(idmap->idmap_pipe, &msg) < 0) {
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remove_wait_queue(&idmap->idmap_wq, &wq);
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goto out;
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}
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set_current_state(TASK_UNINTERRUPTIBLE);
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mutex_unlock(&idmap->idmap_im_lock);
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schedule();
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__set_current_state(TASK_RUNNING);
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remove_wait_queue(&idmap->idmap_wq, &wq);
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mutex_lock(&idmap->idmap_im_lock);
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if (im->im_status & IDMAP_STATUS_SUCCESS) {
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*id = im->im_id;
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ret = 0;
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}
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out:
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memset(im, 0, sizeof(*im));
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mutex_unlock(&idmap->idmap_im_lock);
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mutex_unlock(&idmap->idmap_lock);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* ID -> Name
|
||||
*/
|
||||
static int
|
||||
nfs_idmap_name(struct idmap *idmap, struct idmap_hashtable *h,
|
||||
__u32 id, char *name)
|
||||
static int nfs_idmap_legacy_upcall(struct key_construction *cons,
|
||||
const char *op,
|
||||
void *aux)
|
||||
{
|
||||
struct rpc_pipe_msg msg;
|
||||
struct rpc_pipe_msg *msg;
|
||||
struct idmap_msg *im;
|
||||
struct idmap_hashent *he;
|
||||
DECLARE_WAITQUEUE(wq, current);
|
||||
int ret = -EIO;
|
||||
unsigned int len;
|
||||
struct idmap *idmap = (struct idmap *)aux;
|
||||
struct key *key = cons->key;
|
||||
int ret;
|
||||
|
||||
im = &idmap->idmap_im;
|
||||
|
||||
mutex_lock(&idmap->idmap_lock);
|
||||
mutex_lock(&idmap->idmap_im_lock);
|
||||
|
||||
he = idmap_lookup_id(h, id);
|
||||
if (he) {
|
||||
memcpy(name, he->ih_name, he->ih_namelen);
|
||||
ret = he->ih_namelen;
|
||||
goto out;
|
||||
/* msg and im are freed in idmap_pipe_destroy_msg */
|
||||
msg = kmalloc(sizeof(*msg), GFP_KERNEL);
|
||||
if (IS_ERR(msg)) {
|
||||
ret = PTR_ERR(msg);
|
||||
goto out0;
|
||||
}
|
||||
|
||||
memset(im, 0, sizeof(*im));
|
||||
im->im_type = h->h_type;
|
||||
im->im_conv = IDMAP_CONV_IDTONAME;
|
||||
im->im_id = id;
|
||||
|
||||
memset(&msg, 0, sizeof(msg));
|
||||
msg.data = im;
|
||||
msg.len = sizeof(*im);
|
||||
|
||||
add_wait_queue(&idmap->idmap_wq, &wq);
|
||||
|
||||
if (rpc_queue_upcall(idmap->idmap_pipe, &msg) < 0) {
|
||||
remove_wait_queue(&idmap->idmap_wq, &wq);
|
||||
goto out;
|
||||
im = kmalloc(sizeof(*im), GFP_KERNEL);
|
||||
if (IS_ERR(im)) {
|
||||
ret = PTR_ERR(im);
|
||||
goto out1;
|
||||
}
|
||||
|
||||
set_current_state(TASK_UNINTERRUPTIBLE);
|
||||
mutex_unlock(&idmap->idmap_im_lock);
|
||||
schedule();
|
||||
__set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&idmap->idmap_wq, &wq);
|
||||
mutex_lock(&idmap->idmap_im_lock);
|
||||
ret = nfs_idmap_prepare_message(key->description, im, msg);
|
||||
if (ret < 0)
|
||||
goto out2;
|
||||
|
||||
if (im->im_status & IDMAP_STATUS_SUCCESS) {
|
||||
if ((len = strnlen(im->im_name, IDMAP_NAMESZ)) == 0)
|
||||
goto out;
|
||||
memcpy(name, im->im_name, len);
|
||||
ret = len;
|
||||
idmap->idmap_key_cons = cons;
|
||||
|
||||
return rpc_queue_upcall(idmap->idmap_pipe, msg);
|
||||
|
||||
out2:
|
||||
kfree(im);
|
||||
out1:
|
||||
kfree(msg);
|
||||
out0:
|
||||
complete_request_key(cons, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int nfs_idmap_instantiate(struct key *key, struct key *authkey, char *data)
|
||||
{
|
||||
return key_instantiate_and_link(key, data, strlen(data) + 1,
|
||||
id_resolver_cache->thread_keyring,
|
||||
authkey);
|
||||
}
|
||||
|
||||
static int nfs_idmap_read_message(struct idmap_msg *im, struct key *key, struct key *authkey)
|
||||
{
|
||||
char id_str[NFS_UINT_MAXLEN];
|
||||
int ret = -EINVAL;
|
||||
|
||||
switch (im->im_conv) {
|
||||
case IDMAP_CONV_NAMETOID:
|
||||
sprintf(id_str, "%d", im->im_id);
|
||||
ret = nfs_idmap_instantiate(key, authkey, id_str);
|
||||
break;
|
||||
case IDMAP_CONV_IDTONAME:
|
||||
ret = nfs_idmap_instantiate(key, authkey, im->im_name);
|
||||
break;
|
||||
}
|
||||
|
||||
out:
|
||||
memset(im, 0, sizeof(*im));
|
||||
mutex_unlock(&idmap->idmap_im_lock);
|
||||
mutex_unlock(&idmap->idmap_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
@ -841,141 +697,69 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
|
||||
{
|
||||
struct rpc_inode *rpci = RPC_I(filp->f_path.dentry->d_inode);
|
||||
struct idmap *idmap = (struct idmap *)rpci->private;
|
||||
struct idmap_msg im_in, *im = &idmap->idmap_im;
|
||||
struct idmap_hashtable *h;
|
||||
struct idmap_hashent *he = NULL;
|
||||
struct key_construction *cons = idmap->idmap_key_cons;
|
||||
struct idmap_msg im;
|
||||
size_t namelen_in;
|
||||
int ret;
|
||||
|
||||
if (mlen != sizeof(im_in))
|
||||
return -ENOSPC;
|
||||
|
||||
if (copy_from_user(&im_in, src, mlen) != 0)
|
||||
return -EFAULT;
|
||||
|
||||
mutex_lock(&idmap->idmap_im_lock);
|
||||
|
||||
ret = mlen;
|
||||
im->im_status = im_in.im_status;
|
||||
/* If we got an error, terminate now, and wake up pending upcalls */
|
||||
if (!(im_in.im_status & IDMAP_STATUS_SUCCESS)) {
|
||||
wake_up(&idmap->idmap_wq);
|
||||
if (mlen != sizeof(im)) {
|
||||
ret = -ENOSPC;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Sanity checking of strings */
|
||||
ret = -EINVAL;
|
||||
namelen_in = strnlen(im_in.im_name, IDMAP_NAMESZ);
|
||||
if (namelen_in == 0 || namelen_in == IDMAP_NAMESZ)
|
||||
goto out;
|
||||
|
||||
switch (im_in.im_type) {
|
||||
case IDMAP_TYPE_USER:
|
||||
h = &idmap->idmap_user_hash;
|
||||
break;
|
||||
case IDMAP_TYPE_GROUP:
|
||||
h = &idmap->idmap_group_hash;
|
||||
break;
|
||||
default:
|
||||
goto out;
|
||||
}
|
||||
|
||||
switch (im_in.im_conv) {
|
||||
case IDMAP_CONV_IDTONAME:
|
||||
/* Did we match the current upcall? */
|
||||
if (im->im_conv == IDMAP_CONV_IDTONAME
|
||||
&& im->im_type == im_in.im_type
|
||||
&& im->im_id == im_in.im_id) {
|
||||
/* Yes: copy string, including the terminating '\0' */
|
||||
memcpy(im->im_name, im_in.im_name, namelen_in);
|
||||
im->im_name[namelen_in] = '\0';
|
||||
wake_up(&idmap->idmap_wq);
|
||||
}
|
||||
he = idmap_alloc_id(h, im_in.im_id);
|
||||
break;
|
||||
case IDMAP_CONV_NAMETOID:
|
||||
/* Did we match the current upcall? */
|
||||
if (im->im_conv == IDMAP_CONV_NAMETOID
|
||||
&& im->im_type == im_in.im_type
|
||||
&& strnlen(im->im_name, IDMAP_NAMESZ) == namelen_in
|
||||
&& memcmp(im->im_name, im_in.im_name, namelen_in) == 0) {
|
||||
im->im_id = im_in.im_id;
|
||||
wake_up(&idmap->idmap_wq);
|
||||
}
|
||||
he = idmap_alloc_name(h, im_in.im_name, namelen_in);
|
||||
break;
|
||||
default:
|
||||
if (copy_from_user(&im, src, mlen) != 0) {
|
||||
ret = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* If the entry is valid, also copy it to the cache */
|
||||
if (he != NULL)
|
||||
idmap_update_entry(he, im_in.im_name, namelen_in, im_in.im_id);
|
||||
ret = mlen;
|
||||
if (!(im.im_status & IDMAP_STATUS_SUCCESS)) {
|
||||
ret = mlen;
|
||||
complete_request_key(idmap->idmap_key_cons, -ENOKEY);
|
||||
goto out_incomplete;
|
||||
}
|
||||
|
||||
namelen_in = strnlen(im.im_name, IDMAP_NAMESZ);
|
||||
if (namelen_in == 0 || namelen_in == IDMAP_NAMESZ) {
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = nfs_idmap_read_message(&im, cons->key, cons->authkey);
|
||||
if (ret >= 0) {
|
||||
key_set_timeout(cons->key, nfs_idmap_cache_timeout);
|
||||
ret = mlen;
|
||||
}
|
||||
|
||||
out:
|
||||
mutex_unlock(&idmap->idmap_im_lock);
|
||||
complete_request_key(idmap->idmap_key_cons, ret);
|
||||
out_incomplete:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void
|
||||
idmap_pipe_destroy_msg(struct rpc_pipe_msg *msg)
|
||||
{
|
||||
struct idmap_msg *im = msg->data;
|
||||
struct idmap *idmap = container_of(im, struct idmap, idmap_im);
|
||||
|
||||
if (msg->errno >= 0)
|
||||
return;
|
||||
mutex_lock(&idmap->idmap_im_lock);
|
||||
im->im_status = IDMAP_STATUS_LOOKUPFAIL;
|
||||
wake_up(&idmap->idmap_wq);
|
||||
mutex_unlock(&idmap->idmap_im_lock);
|
||||
}
|
||||
|
||||
/*
|
||||
* Fowler/Noll/Vo hash
|
||||
* http://www.isthe.com/chongo/tech/comp/fnv/
|
||||
*/
|
||||
|
||||
#define FNV_P_32 ((unsigned int)0x01000193) /* 16777619 */
|
||||
#define FNV_1_32 ((unsigned int)0x811c9dc5) /* 2166136261 */
|
||||
|
||||
static unsigned int fnvhash32(const void *buf, size_t buflen)
|
||||
{
|
||||
const unsigned char *p, *end = (const unsigned char *)buf + buflen;
|
||||
unsigned int hash = FNV_1_32;
|
||||
|
||||
for (p = buf; p < end; p++) {
|
||||
hash *= FNV_P_32;
|
||||
hash ^= (unsigned int)*p;
|
||||
}
|
||||
|
||||
return hash;
|
||||
/* Free memory allocated in nfs_idmap_legacy_upcall() */
|
||||
kfree(msg->data);
|
||||
kfree(msg);
|
||||
}
|
||||
|
||||
int nfs_map_name_to_uid(const struct nfs_server *server, const char *name, size_t namelen, __u32 *uid)
|
||||
{
|
||||
struct idmap *idmap = server->nfs_client->cl_idmap;
|
||||
int ret = -EINVAL;
|
||||
|
||||
if (nfs_map_string_to_numeric(name, namelen, uid))
|
||||
return 0;
|
||||
ret = nfs_idmap_lookup_id(name, namelen, "uid", uid);
|
||||
if (ret < 0)
|
||||
ret = nfs_idmap_id(idmap, &idmap->idmap_user_hash, name, namelen, uid);
|
||||
return ret;
|
||||
return nfs_idmap_lookup_id(name, namelen, "uid", uid, idmap);
|
||||
}
|
||||
|
||||
int nfs_map_group_to_gid(const struct nfs_server *server, const char *name, size_t namelen, __u32 *gid)
|
||||
{
|
||||
struct idmap *idmap = server->nfs_client->cl_idmap;
|
||||
int ret = -EINVAL;
|
||||
|
||||
if (nfs_map_string_to_numeric(name, namelen, gid))
|
||||
return 0;
|
||||
ret = nfs_idmap_lookup_id(name, namelen, "gid", gid);
|
||||
if (ret < 0)
|
||||
ret = nfs_idmap_id(idmap, &idmap->idmap_group_hash, name, namelen, gid);
|
||||
return ret;
|
||||
return nfs_idmap_lookup_id(name, namelen, "gid", gid, idmap);
|
||||
}
|
||||
|
||||
int nfs_map_uid_to_name(const struct nfs_server *server, __u32 uid, char *buf, size_t buflen)
|
||||
@ -983,11 +767,8 @@ int nfs_map_uid_to_name(const struct nfs_server *server, __u32 uid, char *buf, s
|
||||
struct idmap *idmap = server->nfs_client->cl_idmap;
|
||||
int ret = -EINVAL;
|
||||
|
||||
if (!(server->caps & NFS_CAP_UIDGID_NOMAP)) {
|
||||
ret = nfs_idmap_lookup_name(uid, "user", buf, buflen);
|
||||
if (ret < 0)
|
||||
ret = nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf);
|
||||
}
|
||||
if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
|
||||
ret = nfs_idmap_lookup_name(uid, "user", buf, buflen, idmap);
|
||||
if (ret < 0)
|
||||
ret = nfs_map_numeric_to_string(uid, buf, buflen);
|
||||
return ret;
|
||||
@ -997,11 +778,8 @@ int nfs_map_gid_to_group(const struct nfs_server *server, __u32 gid, char *buf,
|
||||
struct idmap *idmap = server->nfs_client->cl_idmap;
|
||||
int ret = -EINVAL;
|
||||
|
||||
if (!(server->caps & NFS_CAP_UIDGID_NOMAP)) {
|
||||
ret = nfs_idmap_lookup_name(gid, "group", buf, buflen);
|
||||
if (ret < 0)
|
||||
ret = nfs_idmap_name(idmap, &idmap->idmap_group_hash, gid, buf);
|
||||
}
|
||||
if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
|
||||
ret = nfs_idmap_lookup_name(gid, "group", buf, buflen, idmap);
|
||||
if (ret < 0)
|
||||
ret = nfs_map_numeric_to_string(gid, buf, buflen);
|
||||
return ret;
|
||||
|
||||
@ -69,19 +69,8 @@ struct nfs_server;
|
||||
struct nfs_fattr;
|
||||
struct nfs4_string;
|
||||
|
||||
#ifdef CONFIG_NFS_V4
|
||||
int nfs_idmap_init(void);
|
||||
void nfs_idmap_quit(void);
|
||||
#else
|
||||
static inline int nfs_idmap_init(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void nfs_idmap_quit(void)
|
||||
{}
|
||||
#endif
|
||||
|
||||
int nfs_idmap_new(struct nfs_client *);
|
||||
void nfs_idmap_delete(struct nfs_client *);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user