Commit 4c6d1d85 authored by Chris Mason's avatar Chris Mason
Browse files

btrfs: move struct io_ctl into ctree.h and rename it 



We'll need to put the io_ctl into the block_group cache struct, so
name it struct btrfs_io_ctl and move it into ctree.h

Signed-off-by: default avatarChris Mason <clm@fb.com>
parent 3bce876f

fs/btrfs/ctree.h

+11 −0
Original line number Diff line number Diff line
@@ -1256,6 +1256,17 @@ struct btrfs_caching_control { 
	atomic_t count;

};



struct btrfs_io_ctl {

	void *cur, *orig;

	struct page *page;

	struct page **pages;

	struct btrfs_root *root;

	unsigned long size;

	int index;

	int num_pages;

	unsigned check_crcs:1;

};



struct btrfs_block_group_cache {

	struct btrfs_key key;

	struct btrfs_block_group_item item;

fs/btrfs/free-space-cache.c

+22 −33
Original line number Diff line number Diff line
@@ -271,18 +271,7 @@ static int readahead_cache(struct inode *inode) 
	return 0;

}



struct io_ctl {

	void *cur, *orig;

	struct page *page;

	struct page **pages;

	struct btrfs_root *root;

	unsigned long size;

	int index;

	int num_pages;

	unsigned check_crcs:1;

};



static int io_ctl_init(struct io_ctl *io_ctl, struct inode *inode,

static int io_ctl_init(struct btrfs_io_ctl *io_ctl, struct inode *inode,

		       struct btrfs_root *root, int write)

{

	int num_pages;
@@ -298,7 +287,7 @@ static int io_ctl_init(struct io_ctl *io_ctl, struct inode *inode, 
	    (num_pages * sizeof(u32)) >= PAGE_CACHE_SIZE)

		return -ENOSPC;



	memset(io_ctl, 0, sizeof(struct io_ctl));

	memset(io_ctl, 0, sizeof(struct btrfs_io_ctl));



	io_ctl->pages = kcalloc(num_pages, sizeof(struct page *), GFP_NOFS);

	if (!io_ctl->pages)
@@ -311,12 +300,12 @@ static int io_ctl_init(struct io_ctl *io_ctl, struct inode *inode, 
	return 0;

}



static void io_ctl_free(struct io_ctl *io_ctl)

static void io_ctl_free(struct btrfs_io_ctl *io_ctl)

{

	kfree(io_ctl->pages);

}



static void io_ctl_unmap_page(struct io_ctl *io_ctl)

static void io_ctl_unmap_page(struct btrfs_io_ctl *io_ctl)

{

	if (io_ctl->cur) {

		kunmap(io_ctl->page);
@@ -325,7 +314,7 @@ static void io_ctl_unmap_page(struct io_ctl *io_ctl) 
	}

}



static void io_ctl_map_page(struct io_ctl *io_ctl, int clear)

static void io_ctl_map_page(struct btrfs_io_ctl *io_ctl, int clear)

{

	ASSERT(io_ctl->index < io_ctl->num_pages);

	io_ctl->page = io_ctl->pages[io_ctl->index++];
@@ -336,7 +325,7 @@ static void io_ctl_map_page(struct io_ctl *io_ctl, int clear) 
		memset(io_ctl->cur, 0, PAGE_CACHE_SIZE);

}



static void io_ctl_drop_pages(struct io_ctl *io_ctl)

static void io_ctl_drop_pages(struct btrfs_io_ctl *io_ctl)

{

	int i;
@@ -351,7 +340,7 @@ static void io_ctl_drop_pages(struct io_ctl *io_ctl) 
	}

}



static int io_ctl_prepare_pages(struct io_ctl *io_ctl, struct inode *inode,

static int io_ctl_prepare_pages(struct btrfs_io_ctl *io_ctl, struct inode *inode,

				int uptodate)

{

	struct page *page;
@@ -385,7 +374,7 @@ static int io_ctl_prepare_pages(struct io_ctl *io_ctl, struct inode *inode, 
	return 0;

}



static void io_ctl_set_generation(struct io_ctl *io_ctl, u64 generation)

static void io_ctl_set_generation(struct btrfs_io_ctl *io_ctl, u64 generation)

{

	__le64 *val;
@@ -408,7 +397,7 @@ static void io_ctl_set_generation(struct io_ctl *io_ctl, u64 generation) 
	io_ctl->cur += sizeof(u64);

}



static int io_ctl_check_generation(struct io_ctl *io_ctl, u64 generation)

static int io_ctl_check_generation(struct btrfs_io_ctl *io_ctl, u64 generation)

{

	__le64 *gen;
@@ -437,7 +426,7 @@ static int io_ctl_check_generation(struct io_ctl *io_ctl, u64 generation) 
	return 0;

}



static void io_ctl_set_crc(struct io_ctl *io_ctl, int index)

static void io_ctl_set_crc(struct btrfs_io_ctl *io_ctl, int index)

{

	u32 *tmp;

	u32 crc = ~(u32)0;
@@ -461,7 +450,7 @@ static void io_ctl_set_crc(struct io_ctl *io_ctl, int index) 
	kunmap(io_ctl->pages[0]);

}



static int io_ctl_check_crc(struct io_ctl *io_ctl, int index)

static int io_ctl_check_crc(struct btrfs_io_ctl *io_ctl, int index)

{

	u32 *tmp, val;

	u32 crc = ~(u32)0;
@@ -494,7 +483,7 @@ static int io_ctl_check_crc(struct io_ctl *io_ctl, int index) 
	return 0;

}



static int io_ctl_add_entry(struct io_ctl *io_ctl, u64 offset, u64 bytes,

static int io_ctl_add_entry(struct btrfs_io_ctl *io_ctl, u64 offset, u64 bytes,

			    void *bitmap)

{

	struct btrfs_free_space_entry *entry;
@@ -524,7 +513,7 @@ static int io_ctl_add_entry(struct io_ctl *io_ctl, u64 offset, u64 bytes, 
	return 0;

}



static int io_ctl_add_bitmap(struct io_ctl *io_ctl, void *bitmap)

static int io_ctl_add_bitmap(struct btrfs_io_ctl *io_ctl, void *bitmap)

{

	if (!io_ctl->cur)

		return -ENOSPC;
@@ -547,7 +536,7 @@ static int io_ctl_add_bitmap(struct io_ctl *io_ctl, void *bitmap) 
	return 0;

}



static void io_ctl_zero_remaining_pages(struct io_ctl *io_ctl)

static void io_ctl_zero_remaining_pages(struct btrfs_io_ctl *io_ctl)

{

	/*

	 * If we're not on the boundary we know we've modified the page and we
@@ -564,7 +553,7 @@ static void io_ctl_zero_remaining_pages(struct io_ctl *io_ctl) 
	}

}



static int io_ctl_read_entry(struct io_ctl *io_ctl,

static int io_ctl_read_entry(struct btrfs_io_ctl *io_ctl,

			    struct btrfs_free_space *entry, u8 *type)

{

	struct btrfs_free_space_entry *e;
@@ -591,7 +580,7 @@ static int io_ctl_read_entry(struct io_ctl *io_ctl, 
	return 0;

}



static int io_ctl_read_bitmap(struct io_ctl *io_ctl,

static int io_ctl_read_bitmap(struct btrfs_io_ctl *io_ctl,

			      struct btrfs_free_space *entry)

{

	int ret;
@@ -650,7 +639,7 @@ static int __load_free_space_cache(struct btrfs_root *root, struct inode *inode, 
{

	struct btrfs_free_space_header *header;

	struct extent_buffer *leaf;

	struct io_ctl io_ctl;

	struct btrfs_io_ctl io_ctl;

	struct btrfs_key key;

	struct btrfs_free_space *e, *n;

	LIST_HEAD(bitmaps);
@@ -879,7 +868,7 @@ out: 
}



static noinline_for_stack

int write_cache_extent_entries(struct io_ctl *io_ctl,

int write_cache_extent_entries(struct btrfs_io_ctl *io_ctl,

			      struct btrfs_free_space_ctl *ctl,

			      struct btrfs_block_group_cache *block_group,

			      int *entries, int *bitmaps,
@@ -1002,7 +991,7 @@ fail: 
static noinline_for_stack int

write_pinned_extent_entries(struct btrfs_root *root,

			    struct btrfs_block_group_cache *block_group,

			    struct io_ctl *io_ctl,

			    struct btrfs_io_ctl *io_ctl,

			    int *entries)

{

	u64 start, extent_start, extent_end, len;
@@ -1052,7 +1041,7 @@ write_pinned_extent_entries(struct btrfs_root *root, 
}



static noinline_for_stack int

write_bitmap_entries(struct io_ctl *io_ctl, struct list_head *bitmap_list)

write_bitmap_entries(struct btrfs_io_ctl *io_ctl, struct list_head *bitmap_list)

{

	struct list_head *pos, *n;

	int ret;
@@ -1086,7 +1075,7 @@ static int flush_dirty_cache(struct inode *inode) 


static void noinline_for_stack

cleanup_write_cache_enospc(struct inode *inode,

			   struct io_ctl *io_ctl,

			   struct btrfs_io_ctl *io_ctl,

			   struct extent_state **cached_state,

			   struct list_head *bitmap_list)

{
@@ -1123,7 +1112,7 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode, 
				   struct btrfs_path *path, u64 offset)

{

	struct extent_state *cached_state = NULL;

	struct io_ctl io_ctl;

	struct btrfs_io_ctl io_ctl;

	LIST_HEAD(bitmap_list);

	int entries = 0;

	int bitmaps = 0;

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