*/
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
-#include <linux/nfs_fs_sb.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h>
#define IDMAP_HASH_SZ 128
+/* Default cache timeout is 10 minutes */
+unsigned int nfs_idmap_cache_timeout = 600 * HZ;
+
+static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
+{
+ char *endp;
+ int num = simple_strtol(val, &endp, 0);
+ int jif = num * HZ;
+ if (endp == val || *endp || num < 0 || jif < num)
+ return -EINVAL;
+ *((int *)kp->arg) = jif;
+ return 0;
+}
+
+module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
+ &nfs_idmap_cache_timeout, 0644);
+
struct idmap_hashent {
- __u32 ih_id;
- int ih_namelen;
- char ih_name[IDMAP_NAMESZ];
+ unsigned long ih_expires;
+ __u32 ih_id;
+ size_t ih_namelen;
+ char ih_name[IDMAP_NAMESZ];
};
struct idmap_hashtable {
- __u8 h_type;
- struct idmap_hashent h_entries[IDMAP_HASH_SZ];
+ __u8 h_type;
+ struct idmap_hashent h_entries[IDMAP_HASH_SZ];
};
struct idmap {
- char idmap_path[48];
- struct dentry *idmap_dentry;
- wait_queue_head_t idmap_wq;
- struct idmap_msg idmap_im;
- struct semaphore idmap_lock; /* Serializes upcalls */
- struct semaphore idmap_im_lock; /* Protects the hashtable */
- struct idmap_hashtable idmap_user_hash;
- struct idmap_hashtable idmap_group_hash;
+ struct dentry *idmap_dentry;
+ wait_queue_head_t idmap_wq;
+ struct idmap_msg idmap_im;
+ struct mutex idmap_lock; /* Serializes upcalls */
+ struct mutex idmap_im_lock; /* Protects the hashtable */
+ struct idmap_hashtable idmap_user_hash;
+ struct idmap_hashtable idmap_group_hash;
};
-static ssize_t idmap_pipe_upcall(struct file *, struct rpc_pipe_msg *,
- char __user *, size_t);
-static ssize_t idmap_pipe_downcall(struct file *, const char __user *,
- size_t);
-static void idmap_pipe_destroy_msg(struct rpc_pipe_msg *);
+static ssize_t idmap_pipe_upcall(struct file *, struct rpc_pipe_msg *,
+ char __user *, size_t);
+static ssize_t idmap_pipe_downcall(struct file *, const char __user *,
+ size_t);
+static void idmap_pipe_destroy_msg(struct rpc_pipe_msg *);
static unsigned int fnvhash32(const void *, size_t);
-static struct rpc_pipe_ops idmap_upcall_ops = {
- .upcall = idmap_pipe_upcall,
- .downcall = idmap_pipe_downcall,
- .destroy_msg = idmap_pipe_destroy_msg,
+static const struct rpc_pipe_ops idmap_upcall_ops = {
+ .upcall = idmap_pipe_upcall,
+ .downcall = idmap_pipe_downcall,
+ .destroy_msg = idmap_pipe_destroy_msg,
};
-void
-nfs_idmap_new(struct nfs4_client *clp)
+int
+nfs_idmap_new(struct nfs_client *clp)
{
struct idmap *idmap;
+ int error;
- if (clp->cl_idmap != NULL)
- return;
- if ((idmap = kmalloc(sizeof(*idmap), GFP_KERNEL)) == NULL)
- return;
-
- memset(idmap, 0, sizeof(*idmap));
+ BUG_ON(clp->cl_idmap != NULL);
- snprintf(idmap->idmap_path, sizeof(idmap->idmap_path),
- "%s/idmap", clp->cl_rpcclient->cl_pathname);
+ idmap = kzalloc(sizeof(*idmap), GFP_KERNEL);
+ if (idmap == NULL)
+ return -ENOMEM;
- idmap->idmap_dentry = rpc_mkpipe(idmap->idmap_path,
- idmap, &idmap_upcall_ops, 0);
- if (IS_ERR(idmap->idmap_dentry)) {
+ idmap->idmap_dentry = rpc_mkpipe(clp->cl_rpcclient->cl_path.dentry,
+ "idmap", idmap, &idmap_upcall_ops, 0);
+ if (IS_ERR(idmap->idmap_dentry)) {
+ error = PTR_ERR(idmap->idmap_dentry);
kfree(idmap);
- return;
+ return error;
}
- init_MUTEX(&idmap->idmap_lock);
- init_MUTEX(&idmap->idmap_im_lock);
+ mutex_init(&idmap->idmap_lock);
+ mutex_init(&idmap->idmap_im_lock);
init_waitqueue_head(&idmap->idmap_wq);
idmap->idmap_user_hash.h_type = IDMAP_TYPE_USER;
idmap->idmap_group_hash.h_type = IDMAP_TYPE_GROUP;
clp->cl_idmap = idmap;
+ return 0;
}
void
-nfs_idmap_delete(struct nfs4_client *clp)
+nfs_idmap_delete(struct nfs_client *clp)
{
struct idmap *idmap = clp->cl_idmap;
if (!idmap)
return;
- rpc_unlink(idmap->idmap_path);
+ rpc_unlink(idmap->idmap_dentry);
clp->cl_idmap = NULL;
kfree(idmap);
}
if (he->ih_namelen != len || memcmp(he->ih_name, name, len) != 0)
return NULL;
+ if (time_after(jiffies, he->ih_expires))
+ return NULL;
return he;
}
struct idmap_hashent *he = idmap_id_hash(h, id);
if (he->ih_id != id || he->ih_namelen == 0)
return NULL;
+ if (time_after(jiffies, he->ih_expires))
+ return NULL;
return he;
}
* pretty trivial.
*/
static inline struct idmap_hashent *
-idmap_alloc_name(struct idmap_hashtable *h, char *name, unsigned len)
+idmap_alloc_name(struct idmap_hashtable *h, char *name, size_t len)
{
return idmap_name_hash(h, name, len);
}
memcpy(he->ih_name, name, namelen);
he->ih_name[namelen] = '\0';
he->ih_namelen = namelen;
+ he->ih_expires = jiffies + nfs_idmap_cache_timeout;
}
/*
if (namelen >= IDMAP_NAMESZ)
return -EINVAL;
- down(&idmap->idmap_lock);
- down(&idmap->idmap_im_lock);
+ mutex_lock(&idmap->idmap_lock);
+ mutex_lock(&idmap->idmap_im_lock);
he = idmap_lookup_name(h, name, namelen);
if (he != NULL) {
}
set_current_state(TASK_UNINTERRUPTIBLE);
- up(&idmap->idmap_im_lock);
+ mutex_unlock(&idmap->idmap_im_lock);
schedule();
- current->state = TASK_RUNNING;
+ __set_current_state(TASK_RUNNING);
remove_wait_queue(&idmap->idmap_wq, &wq);
- down(&idmap->idmap_im_lock);
+ mutex_lock(&idmap->idmap_im_lock);
if (im->im_status & IDMAP_STATUS_SUCCESS) {
*id = im->im_id;
out:
memset(im, 0, sizeof(*im));
- up(&idmap->idmap_im_lock);
- up(&idmap->idmap_lock);
- return (ret);
+ mutex_unlock(&idmap->idmap_im_lock);
+ mutex_unlock(&idmap->idmap_lock);
+ return ret;
}
/*
im = &idmap->idmap_im;
- down(&idmap->idmap_lock);
- down(&idmap->idmap_im_lock);
+ mutex_lock(&idmap->idmap_lock);
+ mutex_lock(&idmap->idmap_im_lock);
he = idmap_lookup_id(h, id);
- if (he != 0) {
+ if (he) {
memcpy(name, he->ih_name, he->ih_namelen);
ret = he->ih_namelen;
goto out;
}
set_current_state(TASK_UNINTERRUPTIBLE);
- up(&idmap->idmap_im_lock);
+ mutex_unlock(&idmap->idmap_im_lock);
schedule();
- current->state = TASK_RUNNING;
+ __set_current_state(TASK_RUNNING);
remove_wait_queue(&idmap->idmap_wq, &wq);
- down(&idmap->idmap_im_lock);
+ mutex_lock(&idmap->idmap_im_lock);
if (im->im_status & IDMAP_STATUS_SUCCESS) {
if ((len = strnlen(im->im_name, IDMAP_NAMESZ)) == 0)
out:
memset(im, 0, sizeof(*im));
- up(&idmap->idmap_im_lock);
- up(&idmap->idmap_lock);
+ mutex_unlock(&idmap->idmap_im_lock);
+ mutex_unlock(&idmap->idmap_lock);
return ret;
}
/* RPC pipefs upcall/downcall routines */
static ssize_t
idmap_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg,
- char __user *dst, size_t buflen)
+ char __user *dst, size_t buflen)
{
- char *data = (char *)msg->data + msg->copied;
- ssize_t mlen = msg->len - msg->copied;
- ssize_t left;
-
- if (mlen > buflen)
- mlen = buflen;
-
- left = copy_to_user(dst, data, mlen);
- if (left < 0) {
- msg->errno = left;
- return left;
+ char *data = (char *)msg->data + msg->copied;
+ size_t mlen = min(msg->len, buflen);
+ unsigned long left;
+
+ left = copy_to_user(dst, data, mlen);
+ if (left == mlen) {
+ msg->errno = -EFAULT;
+ return -EFAULT;
}
+
mlen -= left;
msg->copied += mlen;
msg->errno = 0;
- return mlen;
+ return mlen;
}
static ssize_t
idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
{
- struct rpc_inode *rpci = RPC_I(filp->f_dentry->d_inode);
+ 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;
- int namelen_in;
+ size_t namelen_in;
int ret;
- if (mlen != sizeof(im_in))
- return (-ENOSPC);
+ if (mlen != sizeof(im_in))
+ return -ENOSPC;
- if (copy_from_user(&im_in, src, mlen) != 0)
- return (-EFAULT);
+ if (copy_from_user(&im_in, src, mlen) != 0)
+ return -EFAULT;
- down(&idmap->idmap_im_lock);
+ mutex_lock(&idmap->idmap_im_lock);
ret = mlen;
im->im_status = im_in.im_status;
idmap_update_entry(he, im_in.im_name, namelen_in, im_in.im_id);
ret = mlen;
out:
- up(&idmap->idmap_im_lock);
+ mutex_unlock(&idmap->idmap_im_lock);
return ret;
}
if (msg->errno >= 0)
return;
- down(&idmap->idmap_im_lock);
+ mutex_lock(&idmap->idmap_im_lock);
im->im_status = IDMAP_STATUS_LOOKUPFAIL;
wake_up(&idmap->idmap_wq);
- up(&idmap->idmap_im_lock);
+ mutex_unlock(&idmap->idmap_im_lock);
}
/*
hash ^= (unsigned int)*p;
}
- return (hash);
+ return hash;
}
-int nfs_map_name_to_uid(struct nfs4_client *clp, const char *name, size_t namelen, __u32 *uid)
+int nfs_map_name_to_uid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_id(idmap, &idmap->idmap_user_hash, name, namelen, uid);
}
-int nfs_map_group_to_gid(struct nfs4_client *clp, const char *name, size_t namelen, __u32 *uid)
+int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_id(idmap, &idmap->idmap_group_hash, name, namelen, uid);
}
-int nfs_map_uid_to_name(struct nfs4_client *clp, __u32 uid, char *buf)
+int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf);
}
-int nfs_map_gid_to_group(struct nfs4_client *clp, __u32 uid, char *buf)
+int nfs_map_gid_to_group(struct nfs_client *clp, __u32 uid, char *buf)
{
struct idmap *idmap = clp->cl_idmap;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff