Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

1 files changed, 158 insertions, 0 deletions

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
new file mode 100644
index 000000000000..1f6f25a5787f
--- /dev/null
+++ b/fs/btrfs/volumes.h
@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2007 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef __BTRFS_VOLUMES_
+#define __BTRFS_VOLUMES_
+
+#include <linux/bio.h>
+#include "async-thread.h"
+
+struct buffer_head;
+struct btrfs_device {
+        struct list_head dev_list;
+        struct list_head dev_alloc_list;
+        struct btrfs_fs_devices *fs_devices;
+        struct btrfs_root *dev_root;
+        struct buffer_head *pending_io;
+        struct bio *pending_bios;
+        struct bio *pending_bio_tail;
+        int running_pending;
+        u64 generation;
+
+        int barriers;
+        int writeable;
+        int in_fs_metadata;
+
+        spinlock_t io_lock;
+
+        struct block_device *bdev;
+
+        char *name;
+
+        /* the internal btrfs device id */
+        u64 devid;
+
+        /* size of the device */
+        u64 total_bytes;
+
+        /* bytes used */
+        u64 bytes_used;
+
+        /* optimal io alignment for this device */
+        u32 io_align;
+
+        /* optimal io width for this device */
+        u32 io_width;
+
+        /* minimal io size for this device */
+        u32 sector_size;
+
+        /* type and info about this device */
+        u64 type;
+
+        /* physical drive uuid (or lvm uuid) */
+        u8 uuid[BTRFS_UUID_SIZE];
+
+        struct btrfs_work work;
+};
+
+struct btrfs_fs_devices {
+        u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
+
+        /* the device with this id has the most recent coyp of the super */
+        u64 latest_devid;
+        u64 latest_trans;
+        u64 num_devices;
+        u64 open_devices;
+        u64 rw_devices;
+        u64 total_rw_bytes;
+        struct block_device *latest_bdev;
+        /* all of the devices in the FS */
+        struct list_head devices;
+
+        /* devices not currently being allocated */
+        struct list_head alloc_list;
+        struct list_head list;
+
+        struct btrfs_fs_devices *seed;
+        int seeding;
+        int sprouted;
+
+        int opened;
+};
+
+struct btrfs_bio_stripe {
+        struct btrfs_device *dev;
+        u64 physical;
+};
+
+struct btrfs_multi_bio {
+        atomic_t stripes_pending;
+        bio_end_io_t *end_io;
+        struct bio *orig_bio;
+        void *private;
+        atomic_t error;
+        int max_errors;
+        int num_stripes;
+        struct btrfs_bio_stripe stripes[];
+};
+
+#define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
+                            (sizeof(struct btrfs_bio_stripe) * (n)))
+
+int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
+                           struct btrfs_device *device,
+                           u64 chunk_tree, u64 chunk_objectid,
+                           u64 chunk_offset, u64 start, u64 num_bytes);
+int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
+                    u64 logical, u64 *length,
+                    struct btrfs_multi_bio **multi_ret, int mirror_num);
+int btrfs_read_sys_array(struct btrfs_root *root);
+int btrfs_read_chunk_tree(struct btrfs_root *root);
+int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
+                      struct btrfs_root *extent_root, u64 type);
+void btrfs_mapping_init(struct btrfs_mapping_tree *tree);
+void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree);
+int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
+                  int mirror_num, int async_submit);
+int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf);
+int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
+                       int flags, void *holder);
+int btrfs_scan_one_device(const char *path, int flags, void *holder,
+                          struct btrfs_fs_devices **fs_devices_ret);
+int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
+int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices);
+int btrfs_add_device(struct btrfs_trans_handle *trans,
+                     struct btrfs_root *root,
+                     struct btrfs_device *device);
+int btrfs_rm_device(struct btrfs_root *root, char *device_path);
+int btrfs_cleanup_fs_uuids(void);
+int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
+int btrfs_unplug_page(struct btrfs_mapping_tree *map_tree,
+                      u64 logical, struct page *page);
+int btrfs_grow_device(struct btrfs_trans_handle *trans,
+                      struct btrfs_device *device, u64 new_size);
+struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid,
+                                       u8 *uuid, u8 *fsid);
+int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
+int btrfs_init_new_device(struct btrfs_root *root, char *path);
+int btrfs_balance(struct btrfs_root *dev_root);
+void btrfs_unlock_volumes(void);
+void btrfs_lock_volumes(void);
+int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
+#endif