~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/btrfs/tests/btrfs-tests.c

Version: ~ [ linux-5.4-rc7 ] ~ [ linux-5.3.10 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.83 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.153 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.200 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.200 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.76 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (C) 2013 Fusion IO.  All rights reserved.
  3  *
  4  * This program is free software; you can redistribute it and/or
  5  * modify it under the terms of the GNU General Public
  6  * License v2 as published by the Free Software Foundation.
  7  *
  8  * This program is distributed in the hope that it will be useful,
  9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 11  * General Public License for more details.
 12  *
 13  * You should have received a copy of the GNU General Public
 14  * License along with this program; if not, write to the
 15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 16  * Boston, MA 021110-1307, USA.
 17  */
 18 
 19 #include <linux/fs.h>
 20 #include <linux/mount.h>
 21 #include <linux/magic.h>
 22 #include "btrfs-tests.h"
 23 #include "../ctree.h"
 24 #include "../free-space-cache.h"
 25 #include "../free-space-tree.h"
 26 #include "../transaction.h"
 27 #include "../volumes.h"
 28 #include "../disk-io.h"
 29 #include "../qgroup.h"
 30 
 31 static struct vfsmount *test_mnt = NULL;
 32 
 33 static const struct super_operations btrfs_test_super_ops = {
 34         .alloc_inode    = btrfs_alloc_inode,
 35         .destroy_inode  = btrfs_test_destroy_inode,
 36 };
 37 
 38 static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
 39                                        int flags, const char *dev_name,
 40                                        void *data)
 41 {
 42         return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
 43                             NULL, BTRFS_TEST_MAGIC);
 44 }
 45 
 46 static struct file_system_type test_type = {
 47         .name           = "btrfs_test_fs",
 48         .mount          = btrfs_test_mount,
 49         .kill_sb        = kill_anon_super,
 50 };
 51 
 52 struct inode *btrfs_new_test_inode(void)
 53 {
 54         return new_inode(test_mnt->mnt_sb);
 55 }
 56 
 57 int btrfs_init_test_fs(void)
 58 {
 59         int ret;
 60 
 61         ret = register_filesystem(&test_type);
 62         if (ret) {
 63                 printk(KERN_ERR "btrfs: cannot register test file system\n");
 64                 return ret;
 65         }
 66 
 67         test_mnt = kern_mount(&test_type);
 68         if (IS_ERR(test_mnt)) {
 69                 printk(KERN_ERR "btrfs: cannot mount test file system\n");
 70                 unregister_filesystem(&test_type);
 71                 return ret;
 72         }
 73         return 0;
 74 }
 75 
 76 void btrfs_destroy_test_fs(void)
 77 {
 78         kern_unmount(test_mnt);
 79         unregister_filesystem(&test_type);
 80 }
 81 
 82 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(void)
 83 {
 84         struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
 85                                                 GFP_KERNEL);
 86 
 87         if (!fs_info)
 88                 return fs_info;
 89         fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
 90                                       GFP_KERNEL);
 91         if (!fs_info->fs_devices) {
 92                 kfree(fs_info);
 93                 return NULL;
 94         }
 95         fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
 96                                       GFP_KERNEL);
 97         if (!fs_info->super_copy) {
 98                 kfree(fs_info->fs_devices);
 99                 kfree(fs_info);
100                 return NULL;
101         }
102 
103         if (init_srcu_struct(&fs_info->subvol_srcu)) {
104                 kfree(fs_info->fs_devices);
105                 kfree(fs_info->super_copy);
106                 kfree(fs_info);
107                 return NULL;
108         }
109 
110         spin_lock_init(&fs_info->buffer_lock);
111         spin_lock_init(&fs_info->qgroup_lock);
112         spin_lock_init(&fs_info->qgroup_op_lock);
113         spin_lock_init(&fs_info->super_lock);
114         spin_lock_init(&fs_info->fs_roots_radix_lock);
115         spin_lock_init(&fs_info->tree_mod_seq_lock);
116         mutex_init(&fs_info->qgroup_ioctl_lock);
117         mutex_init(&fs_info->qgroup_rescan_lock);
118         rwlock_init(&fs_info->tree_mod_log_lock);
119         fs_info->running_transaction = NULL;
120         fs_info->qgroup_tree = RB_ROOT;
121         fs_info->qgroup_ulist = NULL;
122         atomic64_set(&fs_info->tree_mod_seq, 0);
123         INIT_LIST_HEAD(&fs_info->dirty_qgroups);
124         INIT_LIST_HEAD(&fs_info->dead_roots);
125         INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
126         INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
127         INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
128         extent_io_tree_init(&fs_info->freed_extents[0], NULL);
129         extent_io_tree_init(&fs_info->freed_extents[1], NULL);
130         fs_info->pinned_extents = &fs_info->freed_extents[0];
131         return fs_info;
132 }
133 
134 static void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
135 {
136         struct radix_tree_iter iter;
137         void **slot;
138 
139         spin_lock(&fs_info->buffer_lock);
140         radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
141                 struct extent_buffer *eb;
142 
143                 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
144                 if (!eb)
145                         continue;
146                 /* Shouldn't happen but that kind of thinking creates CVE's */
147                 if (radix_tree_exception(eb)) {
148                         if (radix_tree_deref_retry(eb))
149                                 slot = radix_tree_iter_retry(&iter);
150                         continue;
151                 }
152                 spin_unlock(&fs_info->buffer_lock);
153                 free_extent_buffer_stale(eb);
154                 spin_lock(&fs_info->buffer_lock);
155         }
156         spin_unlock(&fs_info->buffer_lock);
157 
158         btrfs_free_qgroup_config(fs_info);
159         btrfs_free_fs_roots(fs_info);
160         cleanup_srcu_struct(&fs_info->subvol_srcu);
161         kfree(fs_info->super_copy);
162         kfree(fs_info->fs_devices);
163         kfree(fs_info);
164 }
165 
166 void btrfs_free_dummy_root(struct btrfs_root *root)
167 {
168         if (!root)
169                 return;
170         if (root->node)
171                 free_extent_buffer(root->node);
172         if (root->fs_info)
173                 btrfs_free_dummy_fs_info(root->fs_info);
174         kfree(root);
175 }
176 
177 struct btrfs_block_group_cache *
178 btrfs_alloc_dummy_block_group(unsigned long length)
179 {
180         struct btrfs_block_group_cache *cache;
181 
182         cache = kzalloc(sizeof(*cache), GFP_KERNEL);
183         if (!cache)
184                 return NULL;
185         cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
186                                         GFP_KERNEL);
187         if (!cache->free_space_ctl) {
188                 kfree(cache);
189                 return NULL;
190         }
191 
192         cache->key.objectid = 0;
193         cache->key.offset = length;
194         cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
195         cache->sectorsize = 4096;
196         cache->full_stripe_len = 4096;
197 
198         INIT_LIST_HEAD(&cache->list);
199         INIT_LIST_HEAD(&cache->cluster_list);
200         INIT_LIST_HEAD(&cache->bg_list);
201         btrfs_init_free_space_ctl(cache);
202         mutex_init(&cache->free_space_lock);
203 
204         return cache;
205 }
206 
207 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
208 {
209         if (!cache)
210                 return;
211         __btrfs_remove_free_space_cache(cache->free_space_ctl);
212         kfree(cache->free_space_ctl);
213         kfree(cache);
214 }
215 
216 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans)
217 {
218         memset(trans, 0, sizeof(*trans));
219         trans->transid = 1;
220         INIT_LIST_HEAD(&trans->qgroup_ref_list);
221         trans->type = __TRANS_DUMMY;
222 }
223 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp