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: Chris Mason <clm@fb.com>
(cherry picked from commit 4c6d1d85ad89fd8e32dc9204b7f944854399bda9)

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 07192e0a18943cb8b4a6a241bba20a10c3b4f568..72c4781a0ad856dc3cfc9d3f34efa9a235ea9817 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1251,6 +1251,17 @@ 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;

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 4f98914555967d14b35efe26b5eb88ff018984a9..5c219a8b9304c1084acbb8a4ca7879eed3b89616 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -264,18 +264,7 @@ 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;
@@ -291,7 +280,7 @@ 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 = kzalloc(sizeof(struct page *) * num_pages, GFP_NOFS);
        if (!io_ctl->pages)
@@ -304,12 +293,12 @@ 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);
@@ -318,7 +307,7 @@ 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++];
@@ -329,7 +318,7 @@ 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;
 
@@ -344,7 +333,7 @@ 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;
@@ -378,7 +367,7 @@ 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;
 
@@ -401,7 +390,7 @@ 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;
 
@@ -430,7 +419,7 @@ 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;
@@ -454,7 +443,7 @@ 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;
@@ -487,7 +476,7 @@ 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;
@@ -517,7 +506,7 @@ 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;
@@ -540,7 +529,7 @@ 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
@@ -557,7 +546,7 @@ 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;
@@ -584,7 +573,7 @@ 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;
@@ -643,7 +632,7 @@ 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);
@@ -872,7 +861,7 @@ 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,
@@ -979,7 +968,7 @@ 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;
@@ -1029,7 +1018,7 @@ 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;
@@ -1063,7 +1052,7 @@ 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)
 {
@@ -1100,7 +1089,7 @@ 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;