Btrfs: Create extent_buffer interface for large blocksizes
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 800a349..c4b8298 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -20,10 +20,10 @@
#define __BTRFS__
#include <linux/fs.h>
-#include <linux/buffer_head.h>
#include <linux/workqueue.h>
#include <linux/completion.h>
#include "bit-radix.h"
+#include "extent_map.h"
struct btrfs_trans_handle;
struct btrfs_transaction;
@@ -32,7 +32,7 @@
extern struct kmem_cache *btrfs_bit_radix_cachep;
extern struct kmem_cache *btrfs_path_cachep;
-#define BTRFS_MAGIC "_BtRfS_M"
+#define BTRFS_MAGIC "_B2RfS_M"
#define BTRFS_ROOT_TREE_OBJECTID 1ULL
#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
@@ -78,41 +78,41 @@
*/
struct btrfs_disk_key {
__le64 objectid;
- __le32 flags;
+ u8 type;
__le64 offset;
} __attribute__ ((__packed__));
struct btrfs_key {
u64 objectid;
- u32 flags;
+ u8 type;
u64 offset;
} __attribute__ ((__packed__));
+#define BTRFS_FSID_SIZE 16
/*
* every tree block (leaf or node) starts with this header.
*/
struct btrfs_header {
u8 csum[BTRFS_CSUM_SIZE];
- u8 fsid[16]; /* FS specific uuid */
+ u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
__le64 blocknr; /* which block this node is supposed to live in */
__le64 generation;
__le64 owner;
- __le16 nritems;
+ __le32 nritems;
__le16 flags;
u8 level;
} __attribute__ ((__packed__));
#define BTRFS_MAX_LEVEL 8
-#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
+#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
sizeof(struct btrfs_header)) / \
(sizeof(struct btrfs_disk_key) + sizeof(u64)))
#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
-#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
+#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
sizeof(struct btrfs_item) - \
sizeof(struct btrfs_file_extent_item))
-struct buffer_head;
/*
* the super block basically lists the main trees of the FS
* it currently lacks any block count etc etc
@@ -128,7 +128,9 @@
__le64 total_blocks;
__le64 blocks_used;
__le64 root_dir_objectid;
- __le32 blocksize;
+ __le32 sectorsize;
+ __le32 nodesize;
+ __le32 leafsize;
} __attribute__ ((__packed__));
/*
@@ -138,7 +140,7 @@
struct btrfs_item {
struct btrfs_disk_key key;
__le32 offset;
- __le16 size;
+ __le32 size;
} __attribute__ ((__packed__));
/*
@@ -176,7 +178,7 @@
* used while walking the tree.
*/
struct btrfs_path {
- struct buffer_head *nodes[BTRFS_MAX_LEVEL];
+ struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
int slots[BTRFS_MAX_LEVEL];
int reada;
int lowest_level;
@@ -292,6 +294,7 @@
};
struct btrfs_fs_info {
+ u8 fsid[BTRFS_FSID_SIZE];
struct btrfs_root *extent_root;
struct btrfs_root *tree_root;
struct radix_tree_root fs_roots_radix;
@@ -304,9 +307,8 @@
u64 generation;
u64 last_trans_committed;
struct btrfs_transaction *running_transaction;
- struct btrfs_super_block *disk_super;
struct btrfs_super_block super_copy;
- struct buffer_head *sb_buffer;
+ struct extent_buffer *sb_buffer;
struct super_block *sb;
struct inode *btree_inode;
struct mutex trans_mutex;
@@ -325,8 +327,8 @@
* and for the extent tree extent_root root.
*/
struct btrfs_root {
- struct buffer_head *node;
- struct buffer_head *commit_root;
+ struct extent_buffer *node;
+ struct extent_buffer *commit_root;
struct btrfs_root_item root_item;
struct btrfs_key root_key;
struct btrfs_fs_info *fs_info;
@@ -336,7 +338,16 @@
struct rw_semaphore snap_sem;
u64 objectid;
u64 last_trans;
- u32 blocksize;
+
+ /* data allocations are done in sectorsize units */
+ u32 sectorsize;
+
+ /* node allocations are done in nodesize units */
+ u32 nodesize;
+
+ /* leaf allocations are done in leafsize units */
+ u32 leafsize;
+
u32 type;
u64 highest_inode;
u64 last_inode_alloc;
@@ -347,12 +358,6 @@
char *name;
};
-/* the lower bits in the key flags defines the item type */
-#define BTRFS_KEY_TYPE_MAX 256
-#define BTRFS_KEY_TYPE_SHIFT 24
-#define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
- BTRFS_KEY_TYPE_SHIFT)
-
/*
* inode items have the data typically returned from stat and store other
* info about object characteristics. There is one for every file and dir in
@@ -402,246 +407,253 @@
*/
#define BTRFS_STRING_ITEM_KEY 253
+/* some macros to generate set/get funcs for the struct fields. This
+ * assumes there is a lefoo_to_cpu for every type, so lets make a simple
+ * one for u8:
+ */
+#define le8_to_cpu(v) (v)
+#define cpu_to_le8(v) (v)
+#define __le8 u8
-static inline u64 btrfs_block_group_used(struct btrfs_block_group_item *bi)
-{
- return le64_to_cpu(bi->used);
+#define read_eb_member(eb, ptr, type, member, result) ( \
+ read_extent_buffer(eb, (char *)(result), \
+ ((unsigned long)(ptr)) + \
+ offsetof(type, member), \
+ sizeof(((type *)0)->member)))
+
+#define write_eb_member(eb, ptr, type, member, result) ( \
+ write_extent_buffer(eb, (char *)(result), \
+ ((unsigned long)(ptr)) + \
+ offsetof(type, member), \
+ sizeof(((type *)0)->member)))
+
+#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
+static inline u##bits btrfs_##name(struct extent_buffer *eb, \
+ type *s) \
+{ \
+ __le##bits res; \
+ read_eb_member(eb, s, type, member, &res); \
+ return le##bits##_to_cpu(res); \
+} \
+static inline void btrfs_set_##name(struct extent_buffer *eb, \
+ type *s, u##bits val) \
+{ \
+ val = cpu_to_le##bits(val); \
+ write_eb_member(eb, s, type, member, &val); \
}
-static inline void btrfs_set_block_group_used(struct
- btrfs_block_group_item *bi,
- u64 val)
-{
- bi->used = cpu_to_le64(val);
+#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
+static inline u##bits btrfs_##name(struct extent_buffer *eb) \
+{ \
+ __le##bits res; \
+ read_eb_member(eb, NULL, type, member, &res); \
+ return le##bits##_to_cpu(res); \
+} \
+static inline void btrfs_set_##name(struct extent_buffer *eb, \
+ u##bits val) \
+{ \
+ val = cpu_to_le##bits(val); \
+ write_eb_member(eb, NULL, type, member, &val); \
}
-static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i)
-{
- return le64_to_cpu(i->generation);
+#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
+static inline u##bits btrfs_##name(type *s) \
+{ \
+ return le##bits##_to_cpu(s->member); \
+} \
+static inline void btrfs_set_##name(type *s, u##bits val) \
+{ \
+ s->member = cpu_to_le##bits(val); \
}
-static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i,
- u64 val)
+/* struct btrfs_block_group_item */
+BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
+ used, 64);
+BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
+ used, 64);
+
+/* struct btrfs_inode_item */
+BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
+BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
+BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
+BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
+BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
+BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
+BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
+BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
+BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 32);
+BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
+BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
+ compat_flags, 16);
+
+static inline struct btrfs_inode_timespec *
+btrfs_inode_atime(struct btrfs_inode_item *inode_item)
{
- i->generation = cpu_to_le64(val);
+ unsigned long ptr = (unsigned long)inode_item;
+ ptr += offsetof(struct btrfs_inode_item, atime);
+ return (struct btrfs_inode_timespec *)ptr;
}
-static inline u64 btrfs_inode_size(struct btrfs_inode_item *i)
+static inline struct btrfs_inode_timespec *
+btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
{
- return le64_to_cpu(i->size);
+ unsigned long ptr = (unsigned long)inode_item;
+ ptr += offsetof(struct btrfs_inode_item, mtime);
+ return (struct btrfs_inode_timespec *)ptr;
}
-static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val)
+static inline struct btrfs_inode_timespec *
+btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
{
- i->size = cpu_to_le64(val);
+ unsigned long ptr = (unsigned long)inode_item;
+ ptr += offsetof(struct btrfs_inode_item, ctime);
+ return (struct btrfs_inode_timespec *)ptr;
}
-static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i)
+static inline struct btrfs_inode_timespec *
+btrfs_inode_otime(struct btrfs_inode_item *inode_item)
{
- return le64_to_cpu(i->nblocks);
+ unsigned long ptr = (unsigned long)inode_item;
+ ptr += offsetof(struct btrfs_inode_item, otime);
+ return (struct btrfs_inode_timespec *)ptr;
}
-static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val)
+BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_inode_timespec, sec, 64);
+BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_inode_timespec, nsec, 32);
+
+/* struct btrfs_extent_item */
+BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
+BTRFS_SETGET_FUNCS(extent_owner, struct btrfs_extent_item, owner, 32);
+
+BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
+ refs, 32);
+BTRFS_SETGET_STACK_FUNCS(stack_extent_owner, struct btrfs_extent_item,
+ owner, 32);
+
+/* struct btrfs_node */
+BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
+
+static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
{
- i->nblocks = cpu_to_le64(val);
+ unsigned long ptr;
+ ptr = offsetof(struct btrfs_node, ptrs) +
+ sizeof(struct btrfs_key_ptr) * nr;
+ return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
}
-static inline u64 btrfs_inode_block_group(struct btrfs_inode_item *i)
+static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
+ int nr, u64 val)
{
- return le64_to_cpu(i->block_group);
+ unsigned long ptr;
+ ptr = offsetof(struct btrfs_node, ptrs) +
+ sizeof(struct btrfs_key_ptr) * nr;
+ btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
}
-static inline void btrfs_set_inode_block_group(struct btrfs_inode_item *i,
- u64 val)
+static unsigned long btrfs_node_key_ptr_offset(int nr)
{
- i->block_group = cpu_to_le64(val);
+ return offsetof(struct btrfs_node, ptrs) +
+ sizeof(struct btrfs_key_ptr) * nr;
}
-static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i)
+static void btrfs_node_key(struct extent_buffer *eb,
+ struct btrfs_disk_key *disk_key, int nr)
{
- return le32_to_cpu(i->nlink);
+ unsigned long ptr;
+ ptr = btrfs_node_key_ptr_offset(nr);
+ read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
+ struct btrfs_key_ptr, key, disk_key);
+}
+static inline void btrfs_set_node_key(struct extent_buffer *eb,
+ struct btrfs_disk_key *disk_key, int nr)
+{
+ unsigned long ptr;
+ ptr = btrfs_node_key_ptr_offset(nr);
+ write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
+ struct btrfs_key_ptr, key, disk_key);
}
-static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val)
+/* struct btrfs_item */
+BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
+BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
+
+static inline unsigned long btrfs_item_nr_offset(int nr)
{
- i->nlink = cpu_to_le32(val);
+ return offsetof(struct btrfs_leaf, items) +
+ sizeof(struct btrfs_item) * nr;
}
-static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i)
+static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
+ int nr)
{
- return le32_to_cpu(i->uid);
+ return (struct btrfs_item *)btrfs_item_nr_offset(nr);
}
-static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val)
+static inline u32 btrfs_item_end(struct extent_buffer *eb,
+ struct btrfs_item *item)
{
- i->uid = cpu_to_le32(val);
+ return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
}
-static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i)
+static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
{
- return le32_to_cpu(i->gid);
+ return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
}
-static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val)
+static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
{
- i->gid = cpu_to_le32(val);
+ return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
}
-static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i)
+static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
{
- return le32_to_cpu(i->mode);
+ return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
}
-static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val)
+static inline void btrfs_item_key(struct extent_buffer *eb,
+ struct btrfs_disk_key *disk_key, int nr)
{
- i->mode = cpu_to_le32(val);
+ struct btrfs_item *item = btrfs_item_nr(eb, nr);
+ read_eb_member(eb, item, struct btrfs_item, key, disk_key);
}
-static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i)
+static inline void btrfs_set_item_key(struct extent_buffer *eb,
+ struct btrfs_disk_key *disk_key, int nr)
{
- return le32_to_cpu(i->rdev);
+ struct btrfs_item *item = btrfs_item_nr(eb, nr);
+ write_eb_member(eb, item, struct btrfs_item, key, disk_key);
}
-static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val)
+/* struct btrfs_dir_item */
+BTRFS_SETGET_FUNCS(dir_flags, struct btrfs_dir_item, flags, 16);
+BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
+BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
+
+static inline void btrfs_dir_item_key(struct extent_buffer *eb,
+ struct btrfs_dir_item *item,
+ struct btrfs_disk_key *key)
{
- i->rdev = cpu_to_le32(val);
+ read_eb_member(eb, item, struct btrfs_dir_item, location, key);
}
-static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i)
+static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
+ struct btrfs_dir_item *item,
+ struct btrfs_disk_key *key)
{
- return le16_to_cpu(i->flags);
+ write_eb_member(eb, item, struct btrfs_dir_item, location, key);
}
-static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val)
-{
- i->flags = cpu_to_le16(val);
-}
-
-static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i)
-{
- return le16_to_cpu(i->compat_flags);
-}
-
-static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i,
- u16 val)
-{
- i->compat_flags = cpu_to_le16(val);
-}
-
-static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts)
-{
- return le64_to_cpu(ts->sec);
-}
-
-static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts,
- u64 val)
-{
- ts->sec = cpu_to_le64(val);
-}
-
-static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts)
-{
- return le32_to_cpu(ts->nsec);
-}
-
-static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts,
- u32 val)
-{
- ts->nsec = cpu_to_le32(val);
-}
-
-static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei)
-{
- return le32_to_cpu(ei->refs);
-}
-
-static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val)
-{
- ei->refs = cpu_to_le32(val);
-}
-
-static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei)
-{
- return le64_to_cpu(ei->owner);
-}
-
-static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val)
-{
- ei->owner = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr)
-{
- return le64_to_cpu(n->ptrs[nr].blockptr);
-}
-
-
-static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr,
- u64 val)
-{
- n->ptrs[nr].blockptr = cpu_to_le64(val);
-}
-
-static inline u32 btrfs_item_offset(struct btrfs_item *item)
-{
- return le32_to_cpu(item->offset);
-}
-
-static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val)
-{
- item->offset = cpu_to_le32(val);
-}
-
-static inline u32 btrfs_item_end(struct btrfs_item *item)
-{
- return le32_to_cpu(item->offset) + le16_to_cpu(item->size);
-}
-
-static inline u16 btrfs_item_size(struct btrfs_item *item)
-{
- return le16_to_cpu(item->size);
-}
-
-static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val)
-{
- item->size = cpu_to_le16(val);
-}
-
-static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d)
-{
- return le16_to_cpu(d->flags);
-}
-
-static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val)
-{
- d->flags = cpu_to_le16(val);
-}
-
-static inline u8 btrfs_dir_type(struct btrfs_dir_item *d)
-{
- return d->type;
-}
-
-static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val)
-{
- d->type = val;
-}
-
-static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d)
-{
- return le16_to_cpu(d->name_len);
-}
-
-static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val)
-{
- d->name_len = cpu_to_le16(val);
-}
+/* struct btrfs_disk_key */
+BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
+ objectid, 64);
+BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
+BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
struct btrfs_disk_key *disk)
{
cpu->offset = le64_to_cpu(disk->offset);
- cpu->flags = le32_to_cpu(disk->flags);
+ cpu->type = disk->type;
cpu->objectid = le64_to_cpu(disk->objectid);
}
@@ -649,400 +661,167 @@
struct btrfs_key *cpu)
{
disk->offset = cpu_to_le64(cpu->offset);
- disk->flags = cpu_to_le32(cpu->flags);
+ disk->type = cpu->type;
disk->objectid = cpu_to_le64(cpu->objectid);
}
-static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk)
+static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
+ struct btrfs_key *key, int nr)
{
- return le64_to_cpu(disk->objectid);
+ struct btrfs_disk_key disk_key;
+ btrfs_node_key(eb, &disk_key, nr);
+ btrfs_disk_key_to_cpu(key, &disk_key);
}
-static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk,
- u64 val)
+static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
+ struct btrfs_key *key, int nr)
{
- disk->objectid = cpu_to_le64(val);
+ struct btrfs_disk_key disk_key;
+ btrfs_item_key(eb, &disk_key, nr);
+ btrfs_disk_key_to_cpu(key, &disk_key);
}
-static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk)
+static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
+ struct btrfs_dir_item *item,
+ struct btrfs_key *key)
{
- return le64_to_cpu(disk->offset);
+ struct btrfs_disk_key disk_key;
+ btrfs_dir_item_key(eb, item, &disk_key);
+ btrfs_disk_key_to_cpu(key, &disk_key);
}
-static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk,
- u64 val)
+
+static inline u8 btrfs_key_type(struct btrfs_key *key)
{
- disk->offset = cpu_to_le64(val);
+ return key->type;
}
-static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk)
+static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
{
- return le32_to_cpu(disk->flags);
+ key->type = val;
}
-static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk,
- u32 val)
+/* struct btrfs_header */
+BTRFS_SETGET_HEADER_FUNCS(header_blocknr, struct btrfs_header, blocknr, 64);
+BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
+ generation, 64);
+BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
+BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
+BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
+BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
+
+static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
{
- disk->flags = cpu_to_le32(val);
+ unsigned long ptr = offsetof(struct btrfs_header, fsid);
+ return (u8 *)ptr;
}
-static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key)
+static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
{
- return le32_to_cpu(key->flags) >> BTRFS_KEY_TYPE_SHIFT;
+ unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
+ return (u8 *)ptr;
}
-static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key,
- u32 val)
+static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
{
- u32 flags = btrfs_disk_key_flags(key);
- BUG_ON(val >= BTRFS_KEY_TYPE_MAX);
- val = val << BTRFS_KEY_TYPE_SHIFT;
- flags = (flags & ~BTRFS_KEY_TYPE_MASK) | val;
- btrfs_set_disk_key_flags(key, flags);
+ unsigned long ptr = offsetof(struct btrfs_header, csum);
+ return (u8 *)ptr;
}
-static inline u32 btrfs_key_type(struct btrfs_key *key)
+static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
{
- return key->flags >> BTRFS_KEY_TYPE_SHIFT;
+ return NULL;
}
-static inline void btrfs_set_key_type(struct btrfs_key *key, u32 val)
+static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
{
- BUG_ON(val >= BTRFS_KEY_TYPE_MAX);
- val = val << BTRFS_KEY_TYPE_SHIFT;
- key->flags = (key->flags & ~(BTRFS_KEY_TYPE_MASK)) | val;
+ return NULL;
}
-static inline u64 btrfs_header_blocknr(struct btrfs_header *h)
+static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
{
- return le64_to_cpu(h->blocknr);
+ return NULL;
}
-static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr)
+static inline int btrfs_is_leaf(struct extent_buffer *eb)
{
- h->blocknr = cpu_to_le64(blocknr);
+ return (btrfs_header_level(eb) == 0);
}
-static inline u64 btrfs_header_generation(struct btrfs_header *h)
+/* struct btrfs_root_item */
+BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
+BTRFS_SETGET_FUNCS(disk_root_blocknr, struct btrfs_root_item, blocknr, 64);
+
+BTRFS_SETGET_STACK_FUNCS(root_blocknr, struct btrfs_root_item, blocknr, 64);
+BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
+BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
+BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
+BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, blocks_used, 64);
+BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, block_limit, 64);
+
+/* struct btrfs_super_block */
+BTRFS_SETGET_STACK_FUNCS(super_blocknr, struct btrfs_super_block, blocknr, 64);
+BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
+ generation, 64);
+BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
+BTRFS_SETGET_STACK_FUNCS(super_total_blocks, struct btrfs_super_block,
+ total_blocks, 64);
+BTRFS_SETGET_STACK_FUNCS(super_blocks_used, struct btrfs_super_block,
+ blocks_used, 64);
+BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
+ sectorsize, 32);
+BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
+ nodesize, 32);
+BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
+ leafsize, 32);
+BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
+ root_dir_objectid, 64);
+
+static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
{
- return le64_to_cpu(h->generation);
+ return offsetof(struct btrfs_leaf, items);
}
-static inline void btrfs_set_header_generation(struct btrfs_header *h,
- u64 val)
-{
- h->generation = cpu_to_le64(val);
-}
+/* struct btrfs_file_extent_item */
+BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
-static inline u64 btrfs_header_owner(struct btrfs_header *h)
-{
- return le64_to_cpu(h->owner);
-}
-
-static inline void btrfs_set_header_owner(struct btrfs_header *h,
- u64 val)
-{
- h->owner = cpu_to_le64(val);
-}
-
-static inline u16 btrfs_header_nritems(struct btrfs_header *h)
-{
- return le16_to_cpu(h->nritems);
-}
-
-static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val)
-{
- h->nritems = cpu_to_le16(val);
-}
-
-static inline u16 btrfs_header_flags(struct btrfs_header *h)
-{
- return le16_to_cpu(h->flags);
-}
-
-static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val)
-{
- h->flags = cpu_to_le16(val);
-}
-
-static inline int btrfs_header_level(struct btrfs_header *h)
-{
- return h->level;
-}
-
-static inline void btrfs_set_header_level(struct btrfs_header *h, int level)
-{
- BUG_ON(level > BTRFS_MAX_LEVEL);
- h->level = level;
-}
-
-static inline int btrfs_is_leaf(struct btrfs_node *n)
-{
- return (btrfs_header_level(&n->header) == 0);
-}
-
-static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item)
-{
- return le64_to_cpu(item->blocknr);
-}
-
-static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val)
-{
- item->blocknr = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_root_dirid(struct btrfs_root_item *item)
-{
- return le64_to_cpu(item->root_dirid);
-}
-
-static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val)
-{
- item->root_dirid = cpu_to_le64(val);
-}
-
-static inline u32 btrfs_root_refs(struct btrfs_root_item *item)
-{
- return le32_to_cpu(item->refs);
-}
-
-static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val)
-{
- item->refs = cpu_to_le32(val);
-}
-
-static inline u32 btrfs_root_flags(struct btrfs_root_item *item)
-{
- return le32_to_cpu(item->flags);
-}
-
-static inline void btrfs_set_root_flags(struct btrfs_root_item *item, u32 val)
-{
- 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);
-}
-
-static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val)
-{
- s->blocknr = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_generation(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->generation);
-}
-
-static inline void btrfs_set_super_generation(struct btrfs_super_block *s,
- u64 val)
-{
- s->generation = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_root(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->root);
-}
-
-static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val)
-{
- s->root = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->total_blocks);
-}
-
-static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s,
- u64 val)
-{
- s->total_blocks = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->blocks_used);
-}
-
-static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s,
- u64 val)
-{
- s->blocks_used = cpu_to_le64(val);
-}
-
-static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s)
-{
- return le32_to_cpu(s->blocksize);
-}
-
-static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s,
- u32 val)
-{
- s->blocksize = cpu_to_le32(val);
-}
-
-static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->root_dir_objectid);
-}
-
-static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64
- val)
-{
- s->root_dir_objectid = cpu_to_le64(val);
-}
-
-static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
-{
- return (u8 *)l->items;
-}
-
-static inline int btrfs_file_extent_type(struct btrfs_file_extent_item *e)
-{
- return e->type;
-}
-static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item *e,
- u8 val)
-{
- e->type = val;
-}
-
-static inline char *btrfs_file_extent_inline_start(struct
+static inline unsigned long btrfs_file_extent_inline_start(struct
btrfs_file_extent_item *e)
{
- return (char *)(&e->disk_blocknr);
+ unsigned long offset = (unsigned long)e;
+ offset += offsetof(struct btrfs_file_extent_item, disk_blocknr);
+ return offset;
}
static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
- return (unsigned long)(&((struct
- btrfs_file_extent_item *)NULL)->disk_blocknr) + datasize;
+ return offsetof(struct btrfs_file_extent_item, disk_blocknr) + datasize;
}
-static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e)
+static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
+ struct btrfs_item *e)
{
- struct btrfs_file_extent_item *fe = NULL;
- return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr);
+ unsigned long offset;
+ offset = offsetof(struct btrfs_file_extent_item, disk_blocknr);
+ return btrfs_item_size(eb, e) - offset;
}
-static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
- *e)
-{
- return le64_to_cpu(e->disk_blocknr);
-}
-
-static inline void btrfs_set_file_extent_disk_blocknr(struct
- btrfs_file_extent_item
- *e, u64 val)
-{
- e->disk_blocknr = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e)
-{
- return le64_to_cpu(e->generation);
-}
-
-static inline void btrfs_set_file_extent_generation(struct
- btrfs_file_extent_item *e,
- u64 val)
-{
- e->generation = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_file_extent_disk_num_blocks(struct
- btrfs_file_extent_item *e)
-{
- return le64_to_cpu(e->disk_num_blocks);
-}
-
-static inline void btrfs_set_file_extent_disk_num_blocks(struct
- btrfs_file_extent_item
- *e, u64 val)
-{
- e->disk_num_blocks = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e)
-{
- return le64_to_cpu(e->offset);
-}
-
-static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
- *e, u64 val)
-{
- e->offset = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
- *e)
-{
- return le64_to_cpu(e->num_blocks);
-}
-
-static inline void btrfs_set_file_extent_num_blocks(struct
- btrfs_file_extent_item *e,
- u64 val)
-{
- e->num_blocks = cpu_to_le64(val);
-}
+BTRFS_SETGET_FUNCS(file_extent_disk_blocknr, struct btrfs_file_extent_item,
+ disk_blocknr, 64);
+BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
+ generation, 64);
+BTRFS_SETGET_FUNCS(file_extent_disk_num_blocks, struct btrfs_file_extent_item,
+ disk_num_blocks, 64);
+BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
+ offset, 64);
+BTRFS_SETGET_FUNCS(file_extent_num_blocks, struct btrfs_file_extent_item,
+ num_blocks, 64);
static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
{
return sb->s_fs_info;
}
-static inline void btrfs_check_bounds(void *vptr, size_t len,
- void *vcontainer, size_t container_len)
-{
- char *ptr = vptr;
- char *container = vcontainer;
- WARN_ON(ptr < container);
- WARN_ON(ptr + len > container + container_len);
-}
-
-static inline void btrfs_memcpy(struct btrfs_root *root,
- void *dst_block,
- void *dst, const void *src, size_t nr)
-{
- btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
- memcpy(dst, src, nr);
-}
-
-static inline void btrfs_memmove(struct btrfs_root *root,
- void *dst_block,
- void *dst, void *src, size_t nr)
-{
- btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
- memmove(dst, src, nr);
-}
-
static inline int btrfs_set_root_name(struct btrfs_root *root,
const char *name, int len)
{
@@ -1063,7 +842,11 @@
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
((type *)(btrfs_leaf_data(leaf) + \
- btrfs_item_offset((leaf)->items + (slot))))
+ btrfs_item_offset_nr(leaf, slot)))
+
+#define btrfs_item_ptr_offset(leaf, slot) \
+ ((unsigned long)(btrfs_leaf_data(leaf) + \
+ btrfs_item_offset_nr(leaf, slot)))
/* mount option defines and helpers */
#define BTRFS_MOUNT_SUBVOL 0x000001
@@ -1084,7 +867,7 @@
int data, int owner);
int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
-struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
+struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 hint,
u64 empty_size);
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
@@ -1092,7 +875,7 @@
u64 num_blocks, u64 empty_size, u64 search_start,
u64 search_end, struct btrfs_key *ins, int data);
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
- struct buffer_head *buf);
+ struct extent_buffer *buf);
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*root, u64 blocknr, u64 num_blocks, int pin);
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
@@ -1106,10 +889,10 @@
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
/* ctree.c */
-int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct buffer_head *buf, struct buffer_head
- *parent, int parent_slot, struct buffer_head
- **cow_ret);
+int btrfs_cow_block(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct extent_buffer *buf,
+ struct extent_buffer *parent, int parent_slot,
+ struct extent_buffer **cow_ret);
int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, u32 data_size);
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
@@ -1120,7 +903,7 @@
*root, struct btrfs_key *key, struct btrfs_path *p, int
ins_len, int cow);
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, struct buffer_head *parent,
+ struct btrfs_root *root, struct extent_buffer *parent,
int cache_only, u64 *last_ret);
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
struct btrfs_path *btrfs_alloc_path(void);
@@ -1134,7 +917,7 @@
*root, struct btrfs_path *path, struct btrfs_key
*cpu_key, u32 data_size);
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
-int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf);
+int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
*root);
/* root-item.c */
@@ -1179,9 +962,9 @@
int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
/* inode-item.c */
-int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, u64 objectid, struct btrfs_inode_item
- *inode_item);
+int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, u64 objectid);
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path,
struct btrfs_key *location, int mod);
@@ -1224,8 +1007,6 @@
struct btrfs_root *root);
int btrfs_commit_write(struct file *file, struct page *page,
unsigned from, unsigned to);
-int btrfs_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *result, int create);
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
size_t page_offset, u64 start, u64 end,
int create);