Btrfs: Add per-root block accounting and sysfs entries
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 947f061..ffeee54 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -22,6 +22,7 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/workqueue.h>
+#include <linux/completion.h>
#include "bit-radix.h"
struct btrfs_trans_handle;
@@ -313,6 +314,8 @@
struct list_head trans_list;
struct list_head dead_roots;
struct delayed_work trans_work;
+ struct kobject super_kobj;
+ struct completion kobj_unregister;
int do_barriers;
int closing;
};
@@ -328,6 +331,8 @@
struct btrfs_key root_key;
struct btrfs_fs_info *fs_info;
struct inode *inode;
+ struct kobject root_kobj;
+ struct completion kobj_unregister;
u64 objectid;
u64 last_trans;
u32 blocksize;
@@ -338,6 +343,7 @@
struct btrfs_key defrag_progress;
int defrag_running;
int defrag_level;
+ char *name;
};
/* the lower bits in the key flags defines the item type */
@@ -814,6 +820,28 @@
item->flags = cpu_to_le32(val);
}
+static inline void btrfs_set_root_blocks_used(struct btrfs_root_item *item,
+ u64 val)
+{
+ item->blocks_used = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_root_blocks_used(struct btrfs_root_item *item)
+{
+ return le64_to_cpu(item->blocks_used);
+}
+
+static inline void btrfs_set_root_block_limit(struct btrfs_root_item *item,
+ u64 val)
+{
+ item->block_limit = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_root_block_limit(struct btrfs_root_item *item)
+{
+ return le64_to_cpu(item->block_limit);
+}
+
static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s)
{
return le64_to_cpu(s->blocknr);
@@ -1014,6 +1042,23 @@
memmove(dst, src, nr);
}
+static inline int btrfs_set_root_name(struct btrfs_root *root,
+ const char *name, int len)
+{
+ /* if we already have a name just free it */
+ if (root->name)
+ kfree(root->name);
+
+ root->name = kmalloc(len+1, GFP_KERNEL);
+ if (!root->name)
+ return -ENOMEM;
+
+ memcpy(root->name, name, len);
+ root->name[len] ='\0';
+
+ return 0;
+}
+
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
((type *)(btrfs_leaf_data(leaf) + \
@@ -1191,4 +1236,13 @@
/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
struct btrfs_root *root, int cache_only);
+
+/* sysfs.c */
+int btrfs_init_sysfs(void);
+void btrfs_exit_sysfs(void);
+int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
+int btrfs_sysfs_add_root(struct btrfs_root *root);
+void btrfs_sysfs_del_root(struct btrfs_root *root);
+void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
+
#endif