super.c (278038ac53c6c4f53d1d34f978beb9aba1410b2c) super.c (572d8b3945a31bee7c40d21556803e4807fd9141)
1/*
2 * super.c - NILFS module and super block management.
3 *
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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940
941static int nilfs_attach_snapshot(struct super_block *s, __u64 cno,
942 struct dentry **root_dentry)
943{
944 struct the_nilfs *nilfs = s->s_fs_info;
945 struct nilfs_root *root;
946 int ret;
947
1/*
2 * super.c - NILFS module and super block management.
3 *
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

--- 931 unchanged lines hidden (view full) ---

940
941static int nilfs_attach_snapshot(struct super_block *s, __u64 cno,
942 struct dentry **root_dentry)
943{
944 struct the_nilfs *nilfs = s->s_fs_info;
945 struct nilfs_root *root;
946 int ret;
947
948 mutex_lock(&nilfs->ns_snapshot_mount_mutex);
949
948 down_read(&nilfs->ns_segctor_sem);
949 ret = nilfs_cpfile_is_snapshot(nilfs->ns_cpfile, cno);
950 up_read(&nilfs->ns_segctor_sem);
951 if (ret < 0) {
952 ret = (ret == -ENOENT) ? -EINVAL : ret;
953 goto out;
954 } else if (!ret) {
955 printk(KERN_ERR "NILFS: The specified checkpoint is "

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964 printk(KERN_ERR "NILFS: error loading snapshot "
965 "(checkpoint number=%llu).\n",
966 (unsigned long long)cno);
967 goto out;
968 }
969 ret = nilfs_get_root_dentry(s, root, root_dentry);
970 nilfs_put_root(root);
971 out:
950 down_read(&nilfs->ns_segctor_sem);
951 ret = nilfs_cpfile_is_snapshot(nilfs->ns_cpfile, cno);
952 up_read(&nilfs->ns_segctor_sem);
953 if (ret < 0) {
954 ret = (ret == -ENOENT) ? -EINVAL : ret;
955 goto out;
956 } else if (!ret) {
957 printk(KERN_ERR "NILFS: The specified checkpoint is "

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966 printk(KERN_ERR "NILFS: error loading snapshot "
967 "(checkpoint number=%llu).\n",
968 (unsigned long long)cno);
969 goto out;
970 }
971 ret = nilfs_get_root_dentry(s, root, root_dentry);
972 nilfs_put_root(root);
973 out:
974 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
972 return ret;
973}
974
975static int nilfs_tree_was_touched(struct dentry *root_dentry)
976{
977 return root_dentry->d_count > 1;
978}
979

--- 478 unchanged lines hidden --- 		975 return ret;
976}
977
978static int nilfs_tree_was_touched(struct dentry *root_dentry)
979{
980 return root_dentry->d_count > 1;
981}
982

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