1 /* 2 * Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc. 3 * Copyright (c) 2013 Red Hat, Inc. 4 * All Rights Reserved. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it would be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 #ifndef __XFS_ATTR_LEAF_H__ 20 #define __XFS_ATTR_LEAF_H__ 21 22 struct attrlist; 23 struct attrlist_cursor_kern; 24 struct xfs_attr_list_context; 25 struct xfs_da_args; 26 struct xfs_da_state; 27 struct xfs_da_state_blk; 28 struct xfs_inode; 29 struct xfs_trans; 30 31 /* 32 * Used to keep a list of "remote value" extents when unlinking an inode. 33 */ 34 typedef struct xfs_attr_inactive_list { 35 xfs_dablk_t valueblk; /* block number of value bytes */ 36 int valuelen; /* number of bytes in value */ 37 } xfs_attr_inactive_list_t; 38 39 40 /*======================================================================== 41 * Function prototypes for the kernel. 42 *========================================================================*/ 43 44 /* 45 * Internal routines when attribute fork size < XFS_LITINO(mp). 46 */ 47 void xfs_attr_shortform_create(struct xfs_da_args *args); 48 void xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff); 49 int xfs_attr_shortform_lookup(struct xfs_da_args *args); 50 int xfs_attr_shortform_getvalue(struct xfs_da_args *args); 51 int xfs_attr_shortform_to_leaf(struct xfs_da_args *args); 52 int xfs_attr_shortform_remove(struct xfs_da_args *args); 53 int xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp); 54 int xfs_attr_shortform_bytesfit(struct xfs_inode *dp, int bytes); 55 void xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp); 56 57 /* 58 * Internal routines when attribute fork size == XFS_LBSIZE(mp). 59 */ 60 int xfs_attr3_leaf_to_node(struct xfs_da_args *args); 61 int xfs_attr3_leaf_to_shortform(struct xfs_buf *bp, 62 struct xfs_da_args *args, int forkoff); 63 int xfs_attr3_leaf_clearflag(struct xfs_da_args *args); 64 int xfs_attr3_leaf_setflag(struct xfs_da_args *args); 65 int xfs_attr3_leaf_flipflags(struct xfs_da_args *args); 66 67 /* 68 * Routines used for growing the Btree. 69 */ 70 int xfs_attr3_leaf_split(struct xfs_da_state *state, 71 struct xfs_da_state_blk *oldblk, 72 struct xfs_da_state_blk *newblk); 73 int xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf, 74 struct xfs_da_args *args); 75 int xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args); 76 int xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer, 77 struct xfs_da_args *args); 78 int xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer, 79 struct xfs_da_args *args); 80 void xfs_attr3_leaf_list_int(struct xfs_buf *bp, 81 struct xfs_attr_list_context *context); 82 83 /* 84 * Routines used for shrinking the Btree. 85 */ 86 int xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval); 87 void xfs_attr3_leaf_unbalance(struct xfs_da_state *state, 88 struct xfs_da_state_blk *drop_blk, 89 struct xfs_da_state_blk *save_blk); 90 /* 91 * Utility routines. 92 */ 93 xfs_dahash_t xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count); 94 int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp, 95 struct xfs_buf *leaf2_bp); 96 int xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local); 97 int xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp, 98 xfs_dablk_t bno, xfs_daddr_t mappedbno, 99 struct xfs_buf **bpp); 100 void xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo, 101 struct xfs_attr3_icleaf_hdr *to, 102 struct xfs_attr_leafblock *from); 103 void xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo, 104 struct xfs_attr_leafblock *to, 105 struct xfs_attr3_icleaf_hdr *from); 106 107 #endif /* __XFS_ATTR_LEAF_H__ */ 108