[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/btrfs/volumes.h b/ap/os/linux/linux-3.4.x/fs/btrfs/volumes.h
new file mode 100644
index 0000000..bb6b03f
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/btrfs/volumes.h
@@ -0,0 +1,284 @@
+/*
+ * 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 <linux/sort.h>
+#include "async-thread.h"
+
+#define BTRFS_STRIPE_LEN (64 * 1024)
+
+struct buffer_head;
+struct btrfs_pending_bios {
+ struct bio *head;
+ struct bio *tail;
+};
+
+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;
+
+ /* regular prio bios */
+ struct btrfs_pending_bios pending_bios;
+ /* WRITE_SYNC bios */
+ struct btrfs_pending_bios pending_sync_bios;
+
+ int running_pending;
+ u64 generation;
+
+ int writeable;
+ int in_fs_metadata;
+ int missing;
+ int can_discard;
+
+ spinlock_t io_lock;
+
+ struct block_device *bdev;
+
+ /* the mode sent to blkdev_get */
+ fmode_t mode;
+
+ char *name;
+
+ /* the internal btrfs device id */
+ u64 devid;
+
+ /* size of the device */
+ u64 total_bytes;
+
+ /* size of the disk */
+ u64 disk_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];
+
+ /* per-device scrub information */
+ struct scrub_dev *scrub_device;
+
+ struct btrfs_work work;
+ struct rcu_head rcu;
+ struct work_struct rcu_work;
+
+ /* readahead state */
+ spinlock_t reada_lock;
+ atomic_t reada_in_flight;
+ u64 reada_next;
+ struct reada_zone *reada_curr_zone;
+ struct radix_tree_root reada_zones;
+ struct radix_tree_root reada_extents;
+
+ /* for sending down flush barriers */
+ struct bio *flush_bio;
+ struct completion flush_wait;
+ int nobarriers;
+
+};
+
+struct btrfs_fs_devices {
+ u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
+
+ /* the device with this id has the most recent copy of the super */
+ u64 latest_devid;
+ u64 latest_trans;
+ u64 num_devices;
+ u64 open_devices;
+ u64 rw_devices;
+ u64 missing_devices;
+ u64 total_rw_bytes;
+ u64 num_can_discard;
+ struct block_device *latest_bdev;
+
+ /* all of the devices in the FS, protected by a mutex
+ * so we can safely walk it to write out the supers without
+ * worrying about add/remove by the multi-device code
+ */
+ struct mutex device_list_mutex;
+ 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 opened;
+
+ /* set when we find or add a device that doesn't have the
+ * nonrot flag set
+ */
+ int rotating;
+};
+
+struct btrfs_bio_stripe {
+ struct btrfs_device *dev;
+ u64 physical;
+ u64 length; /* only used for discard mappings */
+};
+
+struct btrfs_bio;
+typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err);
+
+struct btrfs_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;
+ int mirror_num;
+ struct btrfs_bio_stripe stripes[];
+};
+
+struct btrfs_device_info {
+ struct btrfs_device *dev;
+ u64 dev_offset;
+ u64 max_avail;
+ u64 total_avail;
+};
+
+struct map_lookup {
+ u64 type;
+ int io_align;
+ int io_width;
+ int stripe_len;
+ int sector_size;
+ int num_stripes;
+ int sub_stripes;
+ struct btrfs_bio_stripe stripes[];
+};
+
+#define map_lookup_size(n) (sizeof(struct map_lookup) + \
+ (sizeof(struct btrfs_bio_stripe) * (n)))
+
+/*
+ * Restriper's general type filter
+ */
+#define BTRFS_BALANCE_DATA (1ULL << 0)
+#define BTRFS_BALANCE_SYSTEM (1ULL << 1)
+#define BTRFS_BALANCE_METADATA (1ULL << 2)
+
+#define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \
+ BTRFS_BALANCE_SYSTEM | \
+ BTRFS_BALANCE_METADATA)
+
+#define BTRFS_BALANCE_FORCE (1ULL << 3)
+#define BTRFS_BALANCE_RESUME (1ULL << 4)
+
+/*
+ * Balance filters
+ */
+#define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
+#define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)
+#define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)
+#define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)
+#define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)
+
+/*
+ * Profile changing flags. When SOFT is set we won't relocate chunk if
+ * it already has the target profile (even though it may be
+ * half-filled).
+ */
+#define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8)
+#define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9)
+
+struct btrfs_balance_args;
+struct btrfs_balance_progress;
+struct btrfs_balance_control {
+ struct btrfs_fs_info *fs_info;
+
+ struct btrfs_balance_args data;
+ struct btrfs_balance_args meta;
+ struct btrfs_balance_args sys;
+
+ u64 flags;
+
+ struct btrfs_balance_progress stat;
+};
+
+int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
+ u64 end, u64 *length);
+
+#define btrfs_bio_size(n) (sizeof(struct btrfs_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_bio **bbio_ret, int mirror_num);
+int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
+ u64 chunk_start, u64 physical, u64 devid,
+ u64 **logical, int *naddrs, int *stripe_len);
+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_open_devices(struct btrfs_fs_devices *fs_devices,
+ fmode_t flags, void *holder);
+int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
+ struct btrfs_fs_devices **fs_devices_ret);
+int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
+void 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);
+void btrfs_cleanup_fs_uuids(void);
+int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
+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_balance_control *bctl,
+ struct btrfs_ioctl_balance_args *bargs);
+int btrfs_recover_balance(struct btrfs_root *tree_root);
+int btrfs_pause_balance(struct btrfs_fs_info *fs_info);
+int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
+int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
+int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
+ u64 *start, u64 *max_avail);
+#endif