Add structures and state information needed for scrub
Signed-off-by: Arne Jansen <sensi...@gmx.net>
---
fs/btrfs/ctree.h | 25 +++++++++++++++++++++++++
fs/btrfs/disk-io.c | 15 +++++++++++++++
fs/btrfs/ioctl.h | 17 +++++++++++++++++
fs/btrfs/volumes.h | 3 +++
4 files changed, 60 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index a89a205..dedcd78 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -23,6 +23,7 @@
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/fs.h>
+#include <linux/rwsem.h>
#include <linux/completion.h>
#include <linux/backing-dev.h>
#include <linux/wait.h>
@@ -32,6 +33,7 @@
#include "extent_io.h"
#include "extent_map.h"
#include "async-thread.h"
+#include "ioctl.h"
struct btrfs_trans_handle;
struct btrfs_transaction;
@@ -48,6 +50,8 @@ struct btrfs_ordered_sum;
#define BTRFS_COMPAT_EXTENT_TREE_V0
+#define SCRUB_BTRFS_WORKER
+
/*
* files bigger than this get some pre-flushing when they are added
* to the ordered operations list. That way we limit the total
@@ -508,6 +512,12 @@ struct btrfs_extent_item_v0 {
/* use full backrefs for extent pointers in the block */
#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
+/*
+ * this flag is only used internally by scrub and may be changed at any time
+ * it is only declared here to avoid collisions
+ */
+#define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
+
struct btrfs_tree_block_info {
struct btrfs_disk_key key;
u8 level;
@@ -1076,6 +1086,21 @@ struct btrfs_fs_info {
void *bdev_holder;
+ /* private scrub information */
+ struct mutex scrub_lock;
+ atomic_t scrubs_running;
+ atomic_t scrub_pause_req;
+ atomic_t scrubs_paused;
+ atomic_t scrub_cancel_req;
+ wait_queue_head_t scrub_pause_wait;
+ struct rw_semaphore scrub_super_lock;
+ int scrub_workers_refcnt;
+#ifdef SCRUB_BTRFS_WORKER
+ struct btrfs_workers scrub_workers;
+#else
+ struct workqueue_struct *scrub_workers;
+#endif
+
/* filesystem state */
u64 fs_state;
};
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 924a366..4d62bc3 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1677,6 +1677,21 @@ struct btrfs_root *open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->ordered_extents);
spin_lock_init(&fs_info->ordered_extent_lock);
+ mutex_init(&fs_info->scrub_lock);
+ atomic_set(&fs_info->scrubs_running, 0);
+ atomic_set(&fs_info->scrub_pause_req, 0);
+ atomic_set(&fs_info->scrubs_paused, 0);
+ atomic_set(&fs_info->scrub_cancel_req, 0);
+ init_waitqueue_head(&fs_info->scrub_pause_wait);
+ init_rwsem(&fs_info->scrub_super_lock);
+ fs_info->scrub_workers_refcnt = 0;
+#ifdef SCRUB_BTRFS_WORKER
+ btrfs_init_workers(&fs_info->scrub_workers, "scrub",
+ fs_info->thread_pool_size, &fs_info->generic_worker);
+#else
+ fs_info->scrub_workers = NULL;
+#endif
+
sb->s_blocksize = 4096;
sb->s_blocksize_bits = blksize_bits(4096);
sb->s_bdi = &fs_info->bdi;
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index 8fb3821..973e7c8 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -42,6 +42,23 @@ struct btrfs_ioctl_vol_args_v2 {
char name[BTRFS_SUBVOL_NAME_MAX + 1];
};
+struct btrfs_scrub_progress {
+ __u64 data_extents_scrubbed;
+ __u64 tree_extents_scrubbed;
+ __u64 data_bytes_scrubbed;
+ __u64 tree_bytes_scrubbed;
+ __u64 read_errors;
+ __u64 csum_errors;
+ __u64 verify_errors;
+ __u64 no_csum;
+ __u64 csum_discards;
+ __u64 super_errors;
+ __u64 malloc_errors;
+ __u64 uncorrectable_errors;
+ __u64 corrected_errors;
+ __u64 last_physical;
+};
+
#define BTRFS_INO_LOOKUP_PATH_MAX 4080
struct btrfs_ioctl_ino_lookup_args {
__u64 treeid;
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 0ccc982..92204d9 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -86,6 +86,9 @@ struct btrfs_device {
/* physical drive uuid (or lvm uuid) */
u8 uuid[BTRFS_UUID_SIZE];
+ /* per-device scrub information */
+ struct scrub_dev *scrub_device;
+
struct btrfs_work work;
};
--
1.7.3.4
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
