diff options
Diffstat (limited to 'fs/btrfs/ctree.h')
-rw-r--r-- | fs/btrfs/ctree.h | 849 |
1 files changed, 315 insertions, 534 deletions
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_transaction_cachep; 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 @@ extern struct kmem_cache *btrfs_path_cachep; */ 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 @@ struct btrfs_super_block { __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_super_block { struct btrfs_item { struct btrfs_disk_key key; __le32 offset; - __le16 size; + __le32 size; } __attribute__ ((__packed__)); /* @@ -176,7 +178,7 @@ struct btrfs_node { * 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_block_group_cache { }; 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 @@ struct btrfs_fs_info { 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 @@ struct btrfs_fs_info { * 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 btrfs_root { 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 @@ struct btrfs_root { 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 @@ struct btrfs_root { */ #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 + +#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); \ +} + +#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_block_group_used(struct btrfs_block_group_item *bi) -{ - return le64_to_cpu(bi->used); -} - -static inline void btrfs_set_block_group_used(struct - btrfs_block_group_item *bi, - u64 val) -{ - bi->used = cpu_to_le64(val); -} - -static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i) -{ - return le64_to_cpu(i->generation); -} - -static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i, - u64 val) -{ - i->generation = cpu_to_le64(val); -} - -static inline u64 btrfs_inode_size(struct btrfs_inode_item *i) -{ - return le64_to_cpu(i->size); -} - -static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val) -{ - i->size = cpu_to_le64(val); -} - -static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i) -{ - return le64_to_cpu(i->nblocks); -} - -static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val) -{ - i->nblocks = cpu_to_le64(val); -} - -static inline u64 btrfs_inode_block_group(struct btrfs_inode_item *i) -{ - return le64_to_cpu(i->block_group); -} - -static inline void btrfs_set_inode_block_group(struct btrfs_inode_item *i, - u64 val) -{ - i->block_group = cpu_to_le64(val); -} - -static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->nlink); -} - -static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val) -{ - i->nlink = cpu_to_le32(val); -} - -static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->uid); -} - -static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val) -{ - i->uid = cpu_to_le32(val); -} - -static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->gid); -} - -static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val) -{ - i->gid = cpu_to_le32(val); -} - -static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->mode); -} - -static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val) -{ - i->mode = cpu_to_le32(val); +#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 u32 btrfs_inode_rdev(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->rdev); -} +/* 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); -static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val) -{ - i->rdev = cpu_to_le32(val); -} +/* 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 u16 btrfs_inode_flags(struct btrfs_inode_item *i) +static inline struct btrfs_inode_timespec * +btrfs_inode_atime(struct btrfs_inode_item *inode_item) { - return le16_to_cpu(i->flags); + unsigned long ptr = (unsigned long)inode_item; + ptr += offsetof(struct btrfs_inode_item, atime); + return (struct btrfs_inode_timespec *)ptr; } -static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val) +static inline struct btrfs_inode_timespec * +btrfs_inode_mtime(struct btrfs_inode_item *inode_item) { - i->flags = cpu_to_le16(val); + unsigned long ptr = (unsigned long)inode_item; + ptr += offsetof(struct btrfs_inode_item, mtime); + return (struct btrfs_inode_timespec *)ptr; } -static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i) +static inline struct btrfs_inode_timespec * +btrfs_inode_ctime(struct btrfs_inode_item *inode_item) { - return le16_to_cpu(i->compat_flags); + unsigned long ptr = (unsigned long)inode_item; + ptr += offsetof(struct btrfs_inode_item, ctime); + return (struct btrfs_inode_timespec *)ptr; } -static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i, - u16 val) +static inline struct btrfs_inode_timespec * +btrfs_inode_otime(struct btrfs_inode_item *inode_item) { - i->compat_flags = cpu_to_le16(val); + unsigned long ptr = (unsigned long)inode_item; + ptr += offsetof(struct btrfs_inode_item, otime); + return (struct btrfs_inode_timespec *)ptr; } -static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts) -{ - return le64_to_cpu(ts->sec); -} +BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_inode_timespec, sec, 64); +BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_inode_timespec, nsec, 32); -static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts, - u64 val) -{ - ts->sec = cpu_to_le64(val); -} +/* 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); -static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts) -{ - return le32_to_cpu(ts->nsec); -} +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); -static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts, - u32 val) -{ - ts->nsec = cpu_to_le32(val); -} +/* struct btrfs_node */ +BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); -static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei) +static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) { - return le32_to_cpu(ei->refs); + 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 void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val) +static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, + int nr, u64 val) { - ei->refs = cpu_to_le32(val); + 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 u64 btrfs_extent_owner(struct btrfs_extent_item *ei) +static unsigned long btrfs_node_key_ptr_offset(int nr) { - return le64_to_cpu(ei->owner); + return offsetof(struct btrfs_node, ptrs) + + sizeof(struct btrfs_key_ptr) * nr; } -static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val) +static void btrfs_node_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr) { - ei->owner = cpu_to_le64(val); + 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 u64 btrfs_node_blockptr(struct btrfs_node *n, int nr) +static inline void btrfs_set_node_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr) { - return le64_to_cpu(n->ptrs[nr].blockptr); + 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); } +/* 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 void btrfs_set_node_blockptr(struct btrfs_node *n, int nr, - u64 val) +static inline unsigned long btrfs_item_nr_offset(int nr) { - n->ptrs[nr].blockptr = cpu_to_le64(val); + return offsetof(struct btrfs_leaf, items) + + sizeof(struct btrfs_item) * nr; } -static inline u32 btrfs_item_offset(struct btrfs_item *item) +static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, + int nr) { - return le32_to_cpu(item->offset); + return (struct btrfs_item *)btrfs_item_nr_offset(nr); } -static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val) +static inline u32 btrfs_item_end(struct extent_buffer *eb, + struct btrfs_item *item) { - item->offset = cpu_to_le32(val); + return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); } -static inline u32 btrfs_item_end(struct btrfs_item *item) +static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) { - return le32_to_cpu(item->offset) + le16_to_cpu(item->size); + return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); } -static inline u16 btrfs_item_size(struct btrfs_item *item) +static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) { - return le16_to_cpu(item->size); + return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); } -static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val) +static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) { - item->size = cpu_to_le16(val); + return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); } -static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d) +static inline void btrfs_item_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr) { - return le16_to_cpu(d->flags); + struct btrfs_item *item = btrfs_item_nr(eb, nr); + read_eb_member(eb, item, struct btrfs_item, key, disk_key); } -static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val) +static inline void btrfs_set_item_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr) { - d->flags = cpu_to_le16(val); + struct btrfs_item *item = btrfs_item_nr(eb, nr); + write_eb_member(eb, item, struct btrfs_item, key, disk_key); } -static inline u8 btrfs_dir_type(struct btrfs_dir_item *d) -{ - return d->type; -} +/* 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_set_dir_type(struct btrfs_dir_item *d, u8 val) +static inline void btrfs_dir_item_key(struct extent_buffer *eb, + struct btrfs_dir_item *item, + struct btrfs_disk_key *key) { - d->type = val; + read_eb_member(eb, item, struct btrfs_dir_item, location, key); } -static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d) +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(d->name_len); + write_eb_member(eb, item, struct btrfs_dir_item, location, key); } -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 @@ static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 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) -{ - return le64_to_cpu(disk->objectid); -} - -static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk, - u64 val) -{ - disk->objectid = cpu_to_le64(val); -} - -static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk) -{ - return le64_to_cpu(disk->offset); -} - -static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk, - u64 val) -{ - disk->offset = cpu_to_le64(val); -} - -static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk) -{ - return le32_to_cpu(disk->flags); -} - -static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk, - u32 val) -{ - disk->flags = cpu_to_le32(val); -} - -static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key) -{ - return le32_to_cpu(key->flags) >> BTRFS_KEY_TYPE_SHIFT; -} - -static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, - u32 val) -{ - 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); -} - -static inline u32 btrfs_key_type(struct btrfs_key *key) -{ - return key->flags >> BTRFS_KEY_TYPE_SHIFT; -} - -static inline void btrfs_set_key_type(struct btrfs_key *key, u32 val) -{ - BUG_ON(val >= BTRFS_KEY_TYPE_MAX); - val = val << BTRFS_KEY_TYPE_SHIFT; - key->flags = (key->flags & ~(BTRFS_KEY_TYPE_MASK)) | val; -} - -static inline u64 btrfs_header_blocknr(struct btrfs_header *h) -{ - return le64_to_cpu(h->blocknr); -} - -static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr) -{ - h->blocknr = cpu_to_le64(blocknr); -} - -static inline u64 btrfs_header_generation(struct btrfs_header *h) +static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, + struct btrfs_key *key, int nr) { - return le64_to_cpu(h->generation); + 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_header_generation(struct btrfs_header *h, - u64 val) +static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, + struct btrfs_key *key, int nr) { - h->generation = 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_header_owner(struct btrfs_header *h) +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(h->owner); + 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_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) +static inline u8 btrfs_key_type(struct btrfs_key *key) { - return le64_to_cpu(s->blocknr); + return key->type; } -static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val) +static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) { - s->blocknr = cpu_to_le64(val); + key->type = val; } -static inline u64 btrfs_super_generation(struct btrfs_super_block *s) -{ - return le64_to_cpu(s->generation); -} +/* 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 void btrfs_set_super_generation(struct btrfs_super_block *s, - u64 val) +static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) { - s->generation = cpu_to_le64(val); + unsigned long ptr = offsetof(struct btrfs_header, fsid); + return (u8 *)ptr; } -static inline u64 btrfs_super_root(struct btrfs_super_block *s) +static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) { - return le64_to_cpu(s->root); + unsigned long ptr = offsetof(struct btrfs_super_block, fsid); + return (u8 *)ptr; } -static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val) +static inline u8 *btrfs_header_csum(struct extent_buffer *eb) { - s->root = cpu_to_le64(val); + unsigned long ptr = offsetof(struct btrfs_header, csum); + return (u8 *)ptr; } -static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s) +static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) { - return le64_to_cpu(s->total_blocks); + return NULL; } -static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s, - u64 val) +static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) { - s->total_blocks = cpu_to_le64(val); + return NULL; } -static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s) +static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) { - return le64_to_cpu(s->blocks_used); + return NULL; } -static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s, - u64 val) +static inline int btrfs_is_leaf(struct extent_buffer *eb) { - s->blocks_used = cpu_to_le64(val); + return (btrfs_header_level(eb) == 0); } -static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s) -{ - return le32_to_cpu(s->blocksize); -} +/* 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); -static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, - u32 val) -{ - s->blocksize = cpu_to_le32(val); -} +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); -static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s) -{ - return le64_to_cpu(s->root_dir_objectid); -} +/* 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 void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64 - val) +static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) { - s->root_dir_objectid = cpu_to_le64(val); + return offsetof(struct btrfs_leaf, items); } -static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l) -{ - return (u8 *)l->items; -} +/* struct btrfs_file_extent_item */ +BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); -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; -} - -static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e) -{ - struct btrfs_file_extent_item *fe = NULL; - return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr); -} - -static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item - *e) -{ - return le64_to_cpu(e->disk_blocknr); + return offsetof(struct btrfs_file_extent_item, disk_blocknr) + datasize; } -static inline void btrfs_set_file_extent_disk_blocknr(struct - btrfs_file_extent_item - *e, u64 val) +static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, + struct btrfs_item *e) { - e->disk_blocknr = cpu_to_le64(val); + 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_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 @@ static inline int btrfs_set_root_name(struct btrfs_root *root, /* 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 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, 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 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans, 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_write_dirty_block_groups(struct btrfs_trans_handle *trans, 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 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *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 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root *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_free_objectid(struct btrfs_trans_handle *trans, 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 inode *btrfs_iget_locked(struct super_block *s, u64 objectid, 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); |