diff options
Diffstat (limited to 'fs/xfs/xfs_attr_leaf.h')
| -rw-r--r-- | fs/xfs/xfs_attr_leaf.h | 122 |
1 files changed, 95 insertions, 27 deletions
diff --git a/fs/xfs/xfs_attr_leaf.h b/fs/xfs/xfs_attr_leaf.h index 77de139a58f0..f9d7846097e2 100644 --- a/fs/xfs/xfs_attr_leaf.h +++ b/fs/xfs/xfs_attr_leaf.h @@ -1,5 +1,6 @@ /* * Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc. + * Copyright (c) 2013 Red Hat, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or @@ -89,7 +90,7 @@ typedef struct xfs_attr_leaf_hdr { /* constant-structure header block */ typedef struct xfs_attr_leaf_entry { /* sorted on key, not name */ __be32 hashval; /* hash value of name */ - __be16 nameidx; /* index into buffer of name/value */ + __be16 nameidx; /* index into buffer of name/value */ __u8 flags; /* LOCAL/ROOT/SECURE/INCOMPLETE flag */ __u8 pad2; /* unused pad byte */ } xfs_attr_leaf_entry_t; @@ -115,6 +116,54 @@ typedef struct xfs_attr_leafblock { } xfs_attr_leafblock_t; /* + * CRC enabled leaf structures. Called "version 3" structures to match the + * version number of the directory and dablk structures for this feature, and + * attr2 is already taken by the variable inode attribute fork size feature. + */ +struct xfs_attr3_leaf_hdr { + struct xfs_da3_blkinfo info; + __be16 count; + __be16 usedbytes; + __be16 firstused; + __u8 holes; + __u8 pad1; + struct xfs_attr_leaf_map freemap[XFS_ATTR_LEAF_MAPSIZE]; +}; + +#define XFS_ATTR3_LEAF_CRC_OFF (offsetof(struct xfs_attr3_leaf_hdr, info.crc)) + +struct xfs_attr3_leafblock { + struct xfs_attr3_leaf_hdr hdr; + struct xfs_attr_leaf_entry entries[1]; + + /* + * The rest of the block contains the following structures after the + * leaf entries, growing from the bottom up. The variables are never + * referenced, the locations accessed purely from helper functions. + * + * struct xfs_attr_leaf_name_local + * struct xfs_attr_leaf_name_remote + */ +}; + +/* + * incore, neutral version of the attribute leaf header + */ +struct xfs_attr3_icleaf_hdr { + __uint32_t forw; + __uint32_t back; + __uint16_t magic; + __uint16_t count; + __uint16_t usedbytes; + __uint16_t firstused; + __u8 holes; + struct { + __uint16_t base; + __uint16_t size; + } freemap[XFS_ATTR_LEAF_MAPSIZE]; +}; + +/* * Flags used in the leaf_entry[i].flags field. * NOTE: the INCOMPLETE bit must not collide with the flags bits specified * on the system call, they are "or"ed together for various operations. @@ -147,26 +196,43 @@ typedef struct xfs_attr_leafblock { */ #define XFS_ATTR_LEAF_NAME_ALIGN ((uint)sizeof(xfs_dablk_t)) +static inline int +xfs_attr3_leaf_hdr_size(struct xfs_attr_leafblock *leafp) +{ + if (leafp->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)) + return sizeof(struct xfs_attr3_leaf_hdr); + return sizeof(struct xfs_attr_leaf_hdr); +} + +static inline struct xfs_attr_leaf_entry * +xfs_attr3_leaf_entryp(xfs_attr_leafblock_t *leafp) +{ + if (leafp->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)) + return &((struct xfs_attr3_leafblock *)leafp)->entries[0]; + return &leafp->entries[0]; +} + /* * Cast typed pointers for "local" and "remote" name/value structs. */ -static inline xfs_attr_leaf_name_remote_t * -xfs_attr_leaf_name_remote(xfs_attr_leafblock_t *leafp, int idx) +static inline char * +xfs_attr3_leaf_name(xfs_attr_leafblock_t *leafp, int idx) { - return (xfs_attr_leaf_name_remote_t *) - &((char *)leafp)[be16_to_cpu(leafp->entries[idx].nameidx)]; + struct xfs_attr_leaf_entry *entries = xfs_attr3_leaf_entryp(leafp); + + return &((char *)leafp)[be16_to_cpu(entries[idx].nameidx)]; } -static inline xfs_attr_leaf_name_local_t * -xfs_attr_leaf_name_local(xfs_attr_leafblock_t *leafp, int idx) +static inline xfs_attr_leaf_name_remote_t * +xfs_attr3_leaf_name_remote(xfs_attr_leafblock_t *leafp, int idx) { - return (xfs_attr_leaf_name_local_t *) - &((char *)leafp)[be16_to_cpu(leafp->entries[idx].nameidx)]; + return (xfs_attr_leaf_name_remote_t *)xfs_attr3_leaf_name(leafp, idx); } -static inline char *xfs_attr_leaf_name(xfs_attr_leafblock_t *leafp, int idx) +static inline xfs_attr_leaf_name_local_t * +xfs_attr3_leaf_name_local(xfs_attr_leafblock_t *leafp, int idx) { - return &((char *)leafp)[be16_to_cpu(leafp->entries[idx].nameidx)]; + return (xfs_attr_leaf_name_local_t *)xfs_attr3_leaf_name(leafp, idx); } /* @@ -221,37 +287,37 @@ int xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes); /* * Internal routines when attribute fork size == XFS_LBSIZE(mp). */ -int xfs_attr_leaf_to_node(struct xfs_da_args *args); -int xfs_attr_leaf_to_shortform(struct xfs_buf *bp, +int xfs_attr3_leaf_to_node(struct xfs_da_args *args); +int xfs_attr3_leaf_to_shortform(struct xfs_buf *bp, struct xfs_da_args *args, int forkoff); -int xfs_attr_leaf_clearflag(struct xfs_da_args *args); -int xfs_attr_leaf_setflag(struct xfs_da_args *args); -int xfs_attr_leaf_flipflags(xfs_da_args_t *args); +int xfs_attr3_leaf_clearflag(struct xfs_da_args *args); +int xfs_attr3_leaf_setflag(struct xfs_da_args *args); +int xfs_attr3_leaf_flipflags(struct xfs_da_args *args); /* * Routines used for growing the Btree. */ -int xfs_attr_leaf_split(struct xfs_da_state *state, +int xfs_attr3_leaf_split(struct xfs_da_state *state, struct xfs_da_state_blk *oldblk, struct xfs_da_state_blk *newblk); -int xfs_attr_leaf_lookup_int(struct xfs_buf *leaf, +int xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf, struct xfs_da_args *args); -int xfs_attr_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args); -int xfs_attr_leaf_add(struct xfs_buf *leaf_buffer, +int xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args); +int xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer, struct xfs_da_args *args); -int xfs_attr_leaf_remove(struct xfs_buf *leaf_buffer, +int xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer, struct xfs_da_args *args); -int xfs_attr_leaf_list_int(struct xfs_buf *bp, +int xfs_attr3_leaf_list_int(struct xfs_buf *bp, struct xfs_attr_list_context *context); /* * Routines used for shrinking the Btree. */ -int xfs_attr_leaf_toosmall(struct xfs_da_state *state, int *retval); -void xfs_attr_leaf_unbalance(struct xfs_da_state *state, +int xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval); +void xfs_attr3_leaf_unbalance(struct xfs_da_state *state, struct xfs_da_state_blk *drop_blk, struct xfs_da_state_blk *save_blk); -int xfs_attr_root_inactive(struct xfs_trans **trans, struct xfs_inode *dp); +int xfs_attr3_root_inactive(struct xfs_trans **trans, struct xfs_inode *dp); /* * Utility routines. @@ -261,10 +327,12 @@ int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp, struct xfs_buf *leaf2_bp); int xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize, int *local); -int xfs_attr_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp, +int xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp, xfs_dablk_t bno, xfs_daddr_t mappedbno, struct xfs_buf **bpp); +void xfs_attr3_leaf_hdr_from_disk(struct xfs_attr3_icleaf_hdr *to, + struct xfs_attr_leafblock *from); -extern const struct xfs_buf_ops xfs_attr_leaf_buf_ops; +extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; #endif /* __XFS_ATTR_LEAF_H__ */ |