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

TOMOYO Linux Cross Reference
Linux/fs/btrfs/free-space-cache.h

Version: ~ [ linux-5.8-rc4 ] ~ [ linux-5.7.7 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.50 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.131 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.187 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.229 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.229 ] ~ [ 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-3.16.85 ] ~ [ 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-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) 2009 Oracle.  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 #ifndef __BTRFS_FREE_SPACE_CACHE
 20 #define __BTRFS_FREE_SPACE_CACHE
 21 
 22 struct btrfs_free_space {
 23         struct rb_node offset_index;
 24         u64 offset;
 25         u64 bytes;
 26         u64 max_extent_size;
 27         unsigned long *bitmap;
 28         struct list_head list;
 29 };
 30 
 31 struct btrfs_free_space_ctl {
 32         spinlock_t tree_lock;
 33         struct rb_root free_space_offset;
 34         u64 free_space;
 35         int extents_thresh;
 36         int free_extents;
 37         int total_bitmaps;
 38         int unit;
 39         u64 start;
 40         const struct btrfs_free_space_op *op;
 41         void *private;
 42         struct mutex cache_writeout_mutex;
 43         struct list_head trimming_ranges;
 44 };
 45 
 46 struct btrfs_free_space_op {
 47         void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl);
 48         bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl,
 49                            struct btrfs_free_space *info);
 50 };
 51 
 52 struct btrfs_io_ctl;
 53 
 54 struct inode *lookup_free_space_inode(struct btrfs_root *root,
 55                                       struct btrfs_block_group_cache
 56                                       *block_group, struct btrfs_path *path);
 57 int create_free_space_inode(struct btrfs_root *root,
 58                             struct btrfs_trans_handle *trans,
 59                             struct btrfs_block_group_cache *block_group,
 60                             struct btrfs_path *path);
 61 
 62 int btrfs_check_trunc_cache_free_space(struct btrfs_root *root,
 63                                        struct btrfs_block_rsv *rsv);
 64 int btrfs_truncate_free_space_cache(struct btrfs_root *root,
 65                                     struct btrfs_trans_handle *trans,
 66                                     struct btrfs_block_group_cache *block_group,
 67                                     struct inode *inode);
 68 int load_free_space_cache(struct btrfs_fs_info *fs_info,
 69                           struct btrfs_block_group_cache *block_group);
 70 int btrfs_wait_cache_io(struct btrfs_root *root,
 71                         struct btrfs_trans_handle *trans,
 72                         struct btrfs_block_group_cache *block_group,
 73                         struct btrfs_io_ctl *io_ctl,
 74                         struct btrfs_path *path, u64 offset);
 75 int btrfs_write_out_cache(struct btrfs_root *root,
 76                           struct btrfs_trans_handle *trans,
 77                           struct btrfs_block_group_cache *block_group,
 78                           struct btrfs_path *path);
 79 struct inode *lookup_free_ino_inode(struct btrfs_root *root,
 80                                     struct btrfs_path *path);
 81 int create_free_ino_inode(struct btrfs_root *root,
 82                           struct btrfs_trans_handle *trans,
 83                           struct btrfs_path *path);
 84 int load_free_ino_cache(struct btrfs_fs_info *fs_info,
 85                         struct btrfs_root *root);
 86 int btrfs_write_out_ino_cache(struct btrfs_root *root,
 87                               struct btrfs_trans_handle *trans,
 88                               struct btrfs_path *path,
 89                               struct inode *inode);
 90 
 91 void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
 92 int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
 93                            u64 bytenr, u64 size);
 94 static inline int
 95 btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
 96                      u64 bytenr, u64 size)
 97 {
 98         return __btrfs_add_free_space(block_group->free_space_ctl,
 99                                       bytenr, size);
100 }
101 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
102                             u64 bytenr, u64 size);
103 void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
104 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
105                                      *block_group);
106 u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
107                                u64 offset, u64 bytes, u64 empty_size,
108                                u64 *max_extent_size);
109 u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
110 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
111                            u64 bytes);
112 int btrfs_find_space_cluster(struct btrfs_root *root,
113                              struct btrfs_block_group_cache *block_group,
114                              struct btrfs_free_cluster *cluster,
115                              u64 offset, u64 bytes, u64 empty_size);
116 void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
117 u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
118                              struct btrfs_free_cluster *cluster, u64 bytes,
119                              u64 min_start, u64 *max_extent_size);
120 int btrfs_return_cluster_to_free_space(
121                                struct btrfs_block_group_cache *block_group,
122                                struct btrfs_free_cluster *cluster);
123 int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
124                            u64 *trimmed, u64 start, u64 end, u64 minlen);
125 
126 /* Support functions for runnint our sanity tests */
127 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
128 int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
129                               u64 offset, u64 bytes, bool bitmap);
130 int test_check_exists(struct btrfs_block_group_cache *cache,
131                       u64 offset, u64 bytes);
132 #endif
133 
134 #endif
135 

~ [ 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