[PATCH] lindent fs/namespace.c
Ram Pai [Mon, 7 Nov 2005 22:16:09 +0000 (17:16 -0500)]
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/namespace.c

index d1aca68..685687d 100644 (file)
@@ -43,29 +43,29 @@ static int event;
 
 static struct list_head *mount_hashtable;
 static int hash_mask __read_mostly, hash_bits __read_mostly;
-static kmem_cache_t *mnt_cache; 
+static kmem_cache_t *mnt_cache;
 
 static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry)
 {
-       unsigned long tmp = ((unsigned long) mnt / L1_CACHE_BYTES);
-       tmp += ((unsigned long) dentry / L1_CACHE_BYTES);
+       unsigned long tmp = ((unsigned long)mnt / L1_CACHE_BYTES);
+       tmp += ((unsigned long)dentry / L1_CACHE_BYTES);
        tmp = tmp + (tmp >> hash_bits);
        return tmp & hash_mask;
 }
 
 struct vfsmount *alloc_vfsmnt(const char *name)
 {
-       struct vfsmount *mnt = kmem_cache_alloc(mnt_cache, GFP_KERNEL); 
+       struct vfsmount *mnt = kmem_cache_alloc(mnt_cache, GFP_KERNEL);
        if (mnt) {
                memset(mnt, 0, sizeof(struct vfsmount));
-               atomic_set(&mnt->mnt_count,1);
+               atomic_set(&mnt->mnt_count, 1);
                INIT_LIST_HEAD(&mnt->mnt_hash);
                INIT_LIST_HEAD(&mnt->mnt_child);
                INIT_LIST_HEAD(&mnt->mnt_mounts);
                INIT_LIST_HEAD(&mnt->mnt_list);
                INIT_LIST_HEAD(&mnt->mnt_expire);
                if (name) {
-                       int size = strlen(name)+1;
+                       int size = strlen(name) + 1;
                        char *newname = kmalloc(size, GFP_KERNEL);
                        if (newname) {
                                memcpy(newname, name, size);
@@ -88,8 +88,8 @@ void free_vfsmnt(struct vfsmount *mnt)
  */
 struct vfsmount *lookup_mnt(struct vfsmount *mnt, struct dentry *dentry)
 {
-       struct list_head * head = mount_hashtable + hash(mnt, dentry);
-       struct list_head * tmp = head;
+       struct list_head *head = mount_hashtable + hash(mnt, dentry);
+       struct list_head *tmp = head;
        struct vfsmount *p, *found = NULL;
 
        spin_lock(&vfsmount_lock);
@@ -144,7 +144,7 @@ static void attach_mnt(struct vfsmount *mnt, struct nameidata *nd)
 {
        mnt->mnt_parent = mntget(nd->mnt);
        mnt->mnt_mountpoint = dget(nd->dentry);
-       list_add(&mnt->mnt_hash, mount_hashtable+hash(nd->mnt, nd->dentry));
+       list_add(&mnt->mnt_hash, mount_hashtable + hash(nd->mnt, nd->dentry));
        list_add_tail(&mnt->mnt_child, &nd->mnt->mnt_mounts);
        nd->dentry->d_mounted++;
 }
@@ -165,8 +165,7 @@ static struct vfsmount *next_mnt(struct vfsmount *p, struct vfsmount *root)
        return list_entry(next, struct vfsmount, mnt_child);
 }
 
-static struct vfsmount *
-clone_mnt(struct vfsmount *old, struct dentry *root)
+static struct vfsmount *clone_mnt(struct vfsmount *old, struct dentry *root)
 {
        struct super_block *sb = old->mnt_sb;
        struct vfsmount *mnt = alloc_vfsmnt(old->mnt_devname);
@@ -258,7 +257,7 @@ static void *m_next(struct seq_file *m, void *v, loff_t *pos)
        struct namespace *n = m->private;
        struct list_head *p = ((struct vfsmount *)v)->mnt_list.next;
        (*pos)++;
-       return p==&n->list ? NULL : list_entry(p, struct vfsmount, mnt_list);
+       return p == &n->list ? NULL : list_entry(p, struct vfsmount, mnt_list);
 }
 
 static void m_stop(struct seq_file *m, void *v)
@@ -344,7 +343,8 @@ repeat:
        next = this_parent->mnt_mounts.next;
 resume:
        while (next != &this_parent->mnt_mounts) {
-               struct vfsmount *p = list_entry(next, struct vfsmount, mnt_child);
+               struct vfsmount *p =
+                   list_entry(next, struct vfsmount, mnt_child);
 
                next = next->next;
 
@@ -425,7 +425,7 @@ static void umount_tree(struct vfsmount *mnt)
 
 static int do_umount(struct vfsmount *mnt, int flags)
 {
-       struct super_block * sb = mnt->mnt_sb;
+       struct super_block *sb = mnt->mnt_sb;
        int retval;
 
        retval = security_sb_umount(mnt, flags);
@@ -461,7 +461,7 @@ static int do_umount(struct vfsmount *mnt, int flags)
         */
 
        lock_kernel();
-       if( (flags&MNT_FORCE) && sb->s_op->umount_begin)
+       if ((flags & MNT_FORCE) && sb->s_op->umount_begin)
                sb->s_op->umount_begin(sb);
        unlock_kernel();
 
@@ -543,12 +543,11 @@ out:
 #ifdef __ARCH_WANT_SYS_OLDUMOUNT
 
 /*
- *     The 2.0 compatible umount. No flags. 
+ *     The 2.0 compatible umount. No flags.
  */
 asmlinkage long sys_oldumount(char __user * name)
 {
-       return sys_umount(name,0);
+       return sys_umount(name, 0);
 }
 
 #endif
@@ -571,8 +570,7 @@ static int mount_is_safe(struct nameidata *nd)
 #endif
 }
 
-static int
-lives_below_in_same_fs(struct dentry *d, struct dentry *dentry)
+static int lives_below_in_same_fs(struct dentry *d, struct dentry *dentry)
 {
        while (1) {
                if (d == dentry)
@@ -616,7 +614,7 @@ static struct vfsmount *copy_tree(struct vfsmount *mnt, struct dentry *dentry)
                }
        }
        return res;
- Enomem:
+Enomem:
        if (res) {
                spin_lock(&vfsmount_lock);
                umount_tree(res);
@@ -718,12 +716,11 @@ out:
  * If you've mounted a non-root directory somewhere and want to do remount
  * on it - tough luck.
  */
-
 static int do_remount(struct nameidata *nd, int flags, int mnt_flags,
                      void *data)
 {
        int err;
-       struct super_block * sb = nd->mnt->mnt_sb;
+       struct super_block *sb = nd->mnt->mnt_sb;
 
        if (!capable(CAP_SYS_ADMIN))
                return -EPERM;
@@ -737,7 +734,7 @@ static int do_remount(struct nameidata *nd, int flags, int mnt_flags,
        down_write(&sb->s_umount);
        err = do_remount_sb(sb, flags, data, 0);
        if (!err)
-               nd->mnt->mnt_flags=mnt_flags;
+               nd->mnt->mnt_flags = mnt_flags;
        up_write(&sb->s_umount);
        if (!err)
                security_sb_post_remount(nd->mnt, flags, data);
@@ -758,7 +755,7 @@ static int do_move_mount(struct nameidata *nd, char *old_name)
                return err;
 
        down_write(&current->namespace->sem);
-       while(d_mountpoint(nd->dentry) && follow_down(&nd->mnt, &nd->dentry))
+       while (d_mountpoint(nd->dentry) && follow_down(&nd->mnt, &nd->dentry))
                ;
        err = -EINVAL;
        if (!check_mnt(nd->mnt) || !check_mnt(old_nd.mnt))
@@ -785,7 +782,7 @@ static int do_move_mount(struct nameidata *nd, char *old_name)
                goto out2;
 
        err = -ELOOP;
-       for (p = nd->mnt; p->mnt_parent!=p; p = p->mnt_parent)
+       for (p = nd->mnt; p->mnt_parent != p; p = p->mnt_parent)
                if (p == old_nd.mnt)
                        goto out2;
        err = 0;
@@ -843,7 +840,7 @@ int do_add_mount(struct vfsmount *newmnt, struct nameidata *nd,
 
        down_write(&current->namespace->sem);
        /* Something was mounted here while we slept */
-       while(d_mountpoint(nd->dentry) && follow_down(&nd->mnt, &nd->dentry))
+       while (d_mountpoint(nd->dentry) && follow_down(&nd->mnt, &nd->dentry))
                ;
        err = -EINVAL;
        if (!check_mnt(nd->mnt))
@@ -986,8 +983,8 @@ EXPORT_SYMBOL_GPL(mark_mounts_for_expiry);
  * Note that this function differs from copy_from_user() in that it will oops
  * on bad values of `to', rather than returning a short copy.
  */
-static long
-exact_copy_from_user(void *to, const void __user *from, unsigned long n)
+static long exact_copy_from_user(void *to, const void __user * from,
+                                unsigned long n)
 {
        char *t = to;
        const char __user *f = from;
@@ -1008,12 +1005,12 @@ exact_copy_from_user(void *to, const void __user *from, unsigned long n)
        return n;
 }
 
-int copy_mount_options(const void __user *data, unsigned long *where)
+int copy_mount_options(const void __user * data, unsigned long *where)
 {
        int i;
        unsigned long page;
        unsigned long size;
-       
+
        *where = 0;
        if (!data)
                return 0;
@@ -1032,7 +1029,7 @@ int copy_mount_options(const void __user *data, unsigned long *where)
 
        i = size - exact_copy_from_user((void *)page, data, size);
        if (!i) {
-               free_page(page); 
+               free_page(page);
                return -EFAULT;
        }
        if (i != PAGE_SIZE)
@@ -1055,7 +1052,7 @@ int copy_mount_options(const void __user *data, unsigned long *where)
  * Therefore, if this magic number is present, it carries no information
  * and must be discarded.
  */
-long do_mount(char * dev_name, char * dir_name, char *type_page,
+long do_mount(char *dev_name, char *dir_name, char *type_page,
                  unsigned long flags, void *data_page)
 {
        struct nameidata nd;
@@ -1083,7 +1080,7 @@ long do_mount(char * dev_name, char * dir_name, char *type_page,
                mnt_flags |= MNT_NODEV;
        if (flags & MS_NOEXEC)
                mnt_flags |= MNT_NOEXEC;
-       flags &= ~(MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_ACTIVE);
+       flags &= ~(MS_NOSUID | MS_NOEXEC | MS_NODEV | MS_ACTIVE);
 
        /* ... and get the mountpoint */
        retval = path_lookup(dir_name, LOOKUP_FOLLOW, &nd);
@@ -1207,7 +1204,7 @@ asmlinkage long sys_mount(char __user * dev_name, char __user * dir_name,
        unsigned long dev_page;
        char *dir_page;
 
-       retval = copy_mount_options (type, &type_page);
+       retval = copy_mount_options(type, &type_page);
        if (retval < 0)
                return retval;
 
@@ -1216,17 +1213,17 @@ asmlinkage long sys_mount(char __user * dev_name, char __user * dir_name,
        if (IS_ERR(dir_page))
                goto out1;
 
-       retval = copy_mount_options (dev_name, &dev_page);
+       retval = copy_mount_options(dev_name, &dev_page);
        if (retval < 0)
                goto out2;
 
-       retval = copy_mount_options (data, &data_page);
+       retval = copy_mount_options(data, &data_page);
        if (retval < 0)
                goto out3;
 
        lock_kernel();
-       retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
-                         flags, (void*)data_page);
+       retval = do_mount((char *)dev_page, dir_page, (char *)type_page,
+                         flags, (void *)data_page);
        unlock_kernel();
        free_page(data_page);
 
@@ -1295,9 +1292,11 @@ static void chroot_fs_refs(struct nameidata *old_nd, struct nameidata *new_nd)
                if (fs) {
                        atomic_inc(&fs->count);
                        task_unlock(p);
-                       if (fs->root==old_nd->dentry&&fs->rootmnt==old_nd->mnt)
+                       if (fs->root == old_nd->dentry
+                           && fs->rootmnt == old_nd->mnt)
                                set_fs_root(fs, new_nd->mnt, new_nd->dentry);
-                       if (fs->pwd==old_nd->dentry&&fs->pwdmnt==old_nd->mnt)
+                       if (fs->pwd == old_nd->dentry
+                           && fs->pwdmnt == old_nd->mnt)
                                set_fs_pwd(fs, new_nd->mnt, new_nd->dentry);
                        put_fs_struct(fs);
                } else
@@ -1327,8 +1326,8 @@ static void chroot_fs_refs(struct nameidata *old_nd, struct nameidata *new_nd)
  *    though, so you may need to say mount --bind /nfs/my_root /nfs/my_root
  *    first.
  */
-
-asmlinkage long sys_pivot_root(const char __user *new_root, const char __user *put_old)
+asmlinkage long sys_pivot_root(const char __user * new_root,
+                              const char __user * put_old)
 {
        struct vfsmount *tmp;
        struct nameidata new_nd, old_nd, parent_nd, root_parent, user_nd;
@@ -1339,14 +1338,15 @@ asmlinkage long sys_pivot_root(const char __user *new_root, const char __user *p
 
        lock_kernel();
 
-       error = __user_walk(new_root, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &new_nd);
+       error = __user_walk(new_root, LOOKUP_FOLLOW | LOOKUP_DIRECTORY,
+                           &new_nd);
        if (error)
                goto out0;
        error = -EINVAL;
        if (!check_mnt(new_nd.mnt))
                goto out1;
 
-       error = __user_walk(put_old, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &old_nd);
+       error = __user_walk(put_old, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &old_nd);
        if (error)
                goto out1;
 
@@ -1464,10 +1464,9 @@ void __init mnt_init(unsigned long mempages)
        int i;
 
        mnt_cache = kmem_cache_create("mnt_cache", sizeof(struct vfsmount),
-                       0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
+                       0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL, NULL);
 
-       mount_hashtable = (struct list_head *)
-               __get_free_page(GFP_ATOMIC);
+       mount_hashtable = (struct list_head *)__get_free_page(GFP_ATOMIC);
 
        if (!mount_hashtable)
                panic("Failed to allocate mount hash table\n");
@@ -1489,7 +1488,7 @@ void __init mnt_init(unsigned long mempages)
         * from the number of bits we can fit.
         */
        nr_hash = 1UL << hash_bits;
-       hash_mask = nr_hash-1;
+       hash_mask = nr_hash - 1;
 
        printk("Mount-cache hash table entries: %d\n", nr_hash);