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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc. * Copyright (c) 2013 Red Hat, Inc. * All Rights Reserved. */ #ifndef __XFS_ATTR_LEAF_H__ #define __XFS_ATTR_LEAF_H__ struct attrlist; struct xfs_attr_list_context; struct xfs_da_args; struct xfs_da_state; struct xfs_da_state_blk; struct xfs_inode; struct xfs_trans; /* * Incore 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; /* * Firstused is 32-bit here instead of 16-bit like the on-disk variant * to support maximum fsb size of 64k without overflow issues throughout * the attr code. Instead, the overflow condition is handled on * conversion to/from disk. */ uint32_t firstused; __u8 holes; struct { uint16_t base; uint16_t size; } freemap[XFS_ATTR_LEAF_MAPSIZE]; }; /*======================================================================== * Function prototypes for the kernel. *========================================================================*/ /* * Internal routines when attribute fork size < XFS_LITINO(mp). */ void xfs_attr_shortform_create(struct xfs_da_args *args); void xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff); int xfs_attr_shortform_lookup(struct xfs_da_args *args); int xfs_attr_shortform_getvalue(struct xfs_da_args *args); int xfs_attr_shortform_to_leaf(struct xfs_da_args *args, struct xfs_buf **leaf_bp); int xfs_attr_shortform_remove(struct xfs_da_args *args); int xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp); int xfs_attr_shortform_bytesfit(struct xfs_inode *dp, int bytes); xfs_failaddr_t xfs_attr_shortform_verify(struct xfs_inode *ip); void xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp); /* * Internal routines when attribute fork size == XFS_LBSIZE(mp). */ 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_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_attr3_leaf_split(struct xfs_da_state *state, struct xfs_da_state_blk *oldblk, struct xfs_da_state_blk *newblk); int xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf, struct xfs_da_args *args); 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_attr3_leaf_remove(struct xfs_buf *leaf_buffer, struct xfs_da_args *args); int xfs_attr3_leaf_list_int(struct xfs_buf *bp, struct xfs_attr_list_context *context); /* * Routines used for shrinking the Btree. */ 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); /* * Utility routines. */ xfs_dahash_t xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count); int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp, struct xfs_buf *leaf2_bp); int xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local); int xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp, xfs_dablk_t bno, struct xfs_buf **bpp); void xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo, struct xfs_attr3_icleaf_hdr *to, struct xfs_attr_leafblock *from); void xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo, struct xfs_attr_leafblock *to, struct xfs_attr3_icleaf_hdr *from); #endif /* __XFS_ATTR_LEAF_H__ */ |