diff options
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 53 |
1 files changed, 46 insertions, 7 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 399521ab61d..50dcd0fbae1 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -154,6 +154,13 @@ struct btrfs_ordered_sum; */ #define BTRFS_NAME_LEN 255 +/* + * Theoretical limit is larger, but we keep this down to a sane + * value. That should limit greatly the possibility of collisions on + * inode ref items. + */ +#define BTRFS_LINK_MAX 65535U + /* 32 bytes in various csum fields */ #define BTRFS_CSUM_SIZE 32 @@ -489,6 +496,8 @@ struct btrfs_super_block { */ #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) +#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6) + #define BTRFS_FEATURE_COMPAT_SUPP 0ULL #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL #define BTRFS_FEATURE_INCOMPAT_SUPP \ @@ -496,7 +505,8 @@ struct btrfs_super_block { BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ - BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO) + BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ + BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) /* * A leaf is full of items. offset and size tell us where to find @@ -643,6 +653,14 @@ struct btrfs_inode_ref { /* name goes here */ } __attribute__ ((__packed__)); +struct btrfs_inode_extref { + __le64 parent_objectid; + __le64 index; + __le16 name_len; + __u8 name[0]; + /* name goes here */ +} __attribute__ ((__packed__)); + struct btrfs_timespec { __le64 sec; __le32 nsec; @@ -1601,6 +1619,7 @@ struct btrfs_ioctl_defrag_range_args { */ #define BTRFS_INODE_ITEM_KEY 1 #define BTRFS_INODE_REF_KEY 12 +#define BTRFS_INODE_EXTREF_KEY 13 #define BTRFS_XATTR_ITEM_KEY 24 #define BTRFS_ORPHAN_ITEM_KEY 48 /* reserve 2-15 close to the inode for later flexibility */ @@ -1987,6 +2006,13 @@ BTRFS_SETGET_STACK_FUNCS(block_group_flags, BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); +/* struct btrfs_inode_extref */ +BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, + parent_objectid, 64); +BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, + name_len, 16); +BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); + /* struct btrfs_inode_item */ BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); @@ -3184,12 +3210,12 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, int name_len, u64 inode_objectid, u64 ref_objectid, u64 *index); -struct btrfs_inode_ref * -btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - const char *name, int name_len, - u64 inode_objectid, u64 ref_objectid, int mod); +int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, int mod, + u64 *ret_index); int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 objectid); @@ -3197,6 +3223,19 @@ int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, struct btrfs_key *location, int mod); +struct btrfs_inode_extref * +btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, int ins_len, + int cow); + +int btrfs_find_name_in_ext_backref(struct btrfs_path *path, + u64 ref_objectid, const char *name, + int name_len, + struct btrfs_inode_extref **extref_ret); + /* file-item.c */ int btrfs_del_csums(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 bytenr, u64 len); |