[PATCH] reiser4: add radix_tree_lookup_slot()
[safe/jmp/linux-2.6] / fs / compat.c
index a912bdf..8e71cdb 100644 (file)
 #include <linux/smb.h>
 #include <linux/smb_mount.h>
 #include <linux/ncp_mount.h>
+#include <linux/nfs4_mount.h>
 #include <linux/smp_lock.h>
 #include <linux/syscalls.h>
 #include <linux/ctype.h>
 #include <linux/module.h>
 #include <linux/dirent.h>
-#include <linux/dnotify.h>
+#include <linux/fsnotify.h>
 #include <linux/highuid.h>
 #include <linux/sunrpc/svc.h>
 #include <linux/nfsd/nfsd.h>
 #include <linux/nfsd/syscall.h>
 #include <linux/personality.h>
 #include <linux/rwsem.h>
+#include <linux/acct.h>
+#include <linux/mm.h>
 
 #include <net/sock.h>          /* siocdevprivate_ioctl */
 
@@ -309,96 +312,6 @@ static int __init init_sys32_ioctl(void)
 
 __initcall(init_sys32_ioctl);
 
-int register_ioctl32_conversion(unsigned int cmd,
-                               ioctl_trans_handler_t handler)
-{
-       struct ioctl_trans *t;
-       struct ioctl_trans *new_t;
-       unsigned long hash = ioctl32_hash(cmd);
-
-       new_t = kmalloc(sizeof(*new_t), GFP_KERNEL);
-       if (!new_t)
-               return -ENOMEM;
-
-       down_write(&ioctl32_sem);
-       for (t = ioctl32_hash_table[hash]; t; t = t->next) {
-               if (t->cmd == cmd) {
-                       printk(KERN_ERR "Trying to register duplicated ioctl32 "
-                                       "handler %x\n", cmd);
-                       up_write(&ioctl32_sem);
-                       kfree(new_t);
-                       return -EINVAL; 
-               }
-       }
-       new_t->next = NULL;
-       new_t->cmd = cmd;
-       new_t->handler = handler;
-       ioctl32_insert_translation(new_t);
-
-       up_write(&ioctl32_sem);
-       return 0;
-}
-EXPORT_SYMBOL(register_ioctl32_conversion);
-
-static inline int builtin_ioctl(struct ioctl_trans *t)
-{ 
-       return t >= ioctl_start && t < (ioctl_start + ioctl_table_size);
-} 
-
-/* Problem: 
-   This function cannot unregister duplicate ioctls, because they are not
-   unique.
-   When they happen we need to extend the prototype to pass the handler too. */
-
-int unregister_ioctl32_conversion(unsigned int cmd)
-{
-       unsigned long hash = ioctl32_hash(cmd);
-       struct ioctl_trans *t, *t1;
-
-       down_write(&ioctl32_sem);
-
-       t = ioctl32_hash_table[hash];
-       if (!t) { 
-               up_write(&ioctl32_sem);
-               return -EINVAL;
-       } 
-
-       if (t->cmd == cmd) { 
-               if (builtin_ioctl(t)) {
-                       printk("%p tried to unregister builtin ioctl %x\n",
-                              __builtin_return_address(0), cmd);
-               } else { 
-                       ioctl32_hash_table[hash] = t->next;
-                       up_write(&ioctl32_sem);
-                       kfree(t);
-                       return 0;
-               }
-       } 
-       while (t->next) {
-               t1 = t->next;
-               if (t1->cmd == cmd) { 
-                       if (builtin_ioctl(t1)) {
-                               printk("%p tried to unregister builtin "
-                                       "ioctl %x\n",
-                                       __builtin_return_address(0), cmd);
-                               goto out;
-                       } else { 
-                               t->next = t1->next;
-                               up_write(&ioctl32_sem);
-                               kfree(t1);
-                               return 0;
-                       }
-               }
-               t = t1;
-       }
-       printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n",
-                               cmd);
-out:
-       up_write(&ioctl32_sem);
-       return -EINVAL;
-}
-EXPORT_SYMBOL(unregister_ioctl32_conversion); 
-
 static void compat_ioctl_error(struct file *filp, unsigned int fd,
                unsigned int cmd, unsigned long arg)
 {
@@ -719,14 +632,14 @@ compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
 struct compat_ncp_mount_data {
        compat_int_t version;
        compat_uint_t ncp_fd;
-       compat_uid_t mounted_uid;
+       __compat_uid_t mounted_uid;
        compat_pid_t wdog_pid;
        unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
        compat_uint_t time_out;
        compat_uint_t retry_count;
        compat_uint_t flags;
-       compat_uid_t uid;
-       compat_gid_t gid;
+       __compat_uid_t uid;
+       __compat_gid_t gid;
        compat_mode_t file_mode;
        compat_mode_t dir_mode;
 };
@@ -783,9 +696,9 @@ static void *do_ncp_super_data_conv(void *raw_data)
 
 struct compat_smb_mount_data {
        compat_int_t version;
-       compat_uid_t mounted_uid;
-       compat_uid_t uid;
-       compat_gid_t gid;
+       __compat_uid_t mounted_uid;
+       __compat_uid_t uid;
+       __compat_gid_t gid;
        compat_mode_t file_mode;
        compat_mode_t dir_mode;
 };
@@ -806,10 +719,79 @@ static void *do_smb_super_data_conv(void *raw_data)
        return raw_data;
 }
 
+struct compat_nfs_string {
+       compat_uint_t len;
+       compat_uptr_t data;
+};
+
+static inline void compat_nfs_string(struct nfs_string *dst,
+                                    struct compat_nfs_string *src)
+{
+       dst->data = compat_ptr(src->data);
+       dst->len = src->len;
+}
+
+struct compat_nfs4_mount_data_v1 {
+       compat_int_t version;
+       compat_int_t flags;
+       compat_int_t rsize;
+       compat_int_t wsize;
+       compat_int_t timeo;
+       compat_int_t retrans;
+       compat_int_t acregmin;
+       compat_int_t acregmax;
+       compat_int_t acdirmin;
+       compat_int_t acdirmax;
+       struct compat_nfs_string client_addr;
+       struct compat_nfs_string mnt_path;
+       struct compat_nfs_string hostname;
+       compat_uint_t host_addrlen;
+       compat_uptr_t host_addr;
+       compat_int_t proto;
+       compat_int_t auth_flavourlen;
+       compat_uptr_t auth_flavours;
+};
+
+static int do_nfs4_super_data_conv(void *raw_data)
+{
+       int version = *(compat_uint_t *) raw_data;
+
+       if (version == 1) {
+               struct compat_nfs4_mount_data_v1 *raw = raw_data;
+               struct nfs4_mount_data *real = raw_data;
+
+               /* copy the fields backwards */
+               real->auth_flavours = compat_ptr(raw->auth_flavours);
+               real->auth_flavourlen = raw->auth_flavourlen;
+               real->proto = raw->proto;
+               real->host_addr = compat_ptr(raw->host_addr);
+               real->host_addrlen = raw->host_addrlen;
+               compat_nfs_string(&real->hostname, &raw->hostname);
+               compat_nfs_string(&real->mnt_path, &raw->mnt_path);
+               compat_nfs_string(&real->client_addr, &raw->client_addr);
+               real->acdirmax = raw->acdirmax;
+               real->acdirmin = raw->acdirmin;
+               real->acregmax = raw->acregmax;
+               real->acregmin = raw->acregmin;
+               real->retrans = raw->retrans;
+               real->timeo = raw->timeo;
+               real->wsize = raw->wsize;
+               real->rsize = raw->rsize;
+               real->flags = raw->flags;
+               real->version = raw->version;
+       }
+       else {
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
 extern int copy_mount_options (const void __user *, unsigned long *);
 
 #define SMBFS_NAME      "smbfs"
 #define NCPFS_NAME      "ncpfs"
+#define NFS4_NAME      "nfs4"
 
 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
                                 char __user * type, unsigned long flags,
@@ -845,6 +827,9 @@ asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
                        do_smb_super_data_conv((void *)data_page);
                } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
                        do_ncp_super_data_conv((void *)data_page);
+               } else if (!strcmp((char *)type_page, NFS4_NAME)) {
+                       if (do_nfs4_super_data_conv((void *) data_page))
+                               goto out4;
                }
        }
 
@@ -853,6 +838,7 @@ asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
                        flags, (void*)data_page);
        unlock_kernel();
 
+ out4:
        free_page(data_page);
  out3:
        free_page(dev_page);
@@ -1233,9 +1219,13 @@ static ssize_t compat_do_readv_writev(int type, struct file *file,
 out:
        if (iov != iovstack)
                kfree(iov);
-       if ((ret + (type == READ)) > 0)
-               dnotify_parent(file->f_dentry,
-                               (type == READ) ? DN_ACCESS : DN_MODIFY);
+       if ((ret + (type == READ)) > 0) {
+               struct dentry *dentry = file->f_dentry;
+               if (type == READ)
+                       fsnotify_access(dentry);
+               else
+                       fsnotify_modify(dentry);
+       }
        return ret;
 }
 
@@ -1287,6 +1277,16 @@ out:
 }
 
 /*
+ * Exactly like fs/open.c:sys_open(), except that it doesn't set the
+ * O_LARGEFILE flag.
+ */
+asmlinkage long
+compat_sys_open(const char __user *filename, int flags, int mode)
+{
+       return do_sys_open(filename, flags, mode);
+}
+
+/*
  * compat_count() counts the number of arguments/envelopes. It is basically
  * a copy of count() from fs/exec.c, except that it works with 32 bit argv
  * and envp pointers.
@@ -1489,6 +1489,7 @@ int compat_do_execve(char * filename,
 
                /* execve success */
                security_bprm_free(bprm);
+               acct_update_integrals(current);
                kfree(bprm);
                return retval;
        }
@@ -1621,6 +1622,7 @@ compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp
        char *bits;
        long timeout;
        int size, max_fdset, ret = -EINVAL;
+       struct fdtable *fdt;
 
        timeout = MAX_SCHEDULE_TIMEOUT;
        if (tvp) {
@@ -1646,7 +1648,10 @@ compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp
                goto out_nofds;
 
        /* max_fdset can increase, so grab it once to avoid race */
-       max_fdset = current->files->max_fdset;
+       rcu_read_lock();
+       fdt = files_fdtable(current->files);
+       max_fdset = fdt->max_fdset;
+       rcu_read_unlock();
        if (n > max_fdset)
                n = max_fdset;
 
@@ -1730,8 +1735,8 @@ struct compat_nfsctl_export {
        compat_dev_t    ex32_dev;
        compat_ino_t    ex32_ino;
        compat_int_t    ex32_flags;
-       compat_uid_t    ex32_anon_uid;
-       compat_gid_t    ex32_anon_gid;
+       __compat_uid_t  ex32_anon_uid;
+       __compat_gid_t  ex32_anon_gid;
 };
 
 struct compat_nfsctl_fdparm {