1 /* 2 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_ATTR_SF_H__ 19 #define __XFS_ATTR_SF_H__ 20 21 /* 22 * Attribute storage when stored inside the inode. 23 * 24 * Small attribute lists are packed as tightly as possible so as 25 * to fit into the literal area of the inode. 26 */ 27 28 struct xfs_inode; 29 30 /* 31 * Entries are packed toward the top as tight as possible. 32 */ 33 typedef struct xfs_attr_shortform { 34 struct xfs_attr_sf_hdr { /* constant-structure header block */ 35 __be16 totsize; /* total bytes in shortform list */ 36 __u8 count; /* count of active entries */ 37 } hdr; 38 struct xfs_attr_sf_entry { 39 __uint8_t namelen; /* actual length of name (no NULL) */ 40 __uint8_t valuelen; /* actual length of value (no NULL) */ 41 __uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */ 42 __uint8_t nameval[1]; /* name & value bytes concatenated */ 43 } list[1]; /* variable sized array */ 44 } xfs_attr_shortform_t; 45 typedef struct xfs_attr_sf_hdr xfs_attr_sf_hdr_t; 46 typedef struct xfs_attr_sf_entry xfs_attr_sf_entry_t; 47 48 /* 49 * We generate this then sort it, attr_list() must return things in hash-order. 50 */ 51 typedef struct xfs_attr_sf_sort { 52 __uint8_t entno; /* entry number in original list */ 53 __uint8_t namelen; /* length of name value (no null) */ 54 __uint8_t valuelen; /* length of value */ 55 __uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */ 56 xfs_dahash_t hash; /* this entry's hash value */ 57 char *name; /* name value, pointer into buffer */ 58 } xfs_attr_sf_sort_t; 59 60 #define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen) /* space name/value uses */ \ 61 (((int)sizeof(xfs_attr_sf_entry_t)-1 + (nlen)+(vlen))) 62 #define XFS_ATTR_SF_ENTSIZE_MAX /* max space for name&value */ \ 63 ((1 << (NBBY*(int)sizeof(__uint8_t))) - 1) 64 #define XFS_ATTR_SF_ENTSIZE(sfep) /* space an entry uses */ \ 65 ((int)sizeof(xfs_attr_sf_entry_t)-1 + (sfep)->namelen+(sfep)->valuelen) 66 #define XFS_ATTR_SF_NEXTENTRY(sfep) /* next entry in struct */ \ 67 ((xfs_attr_sf_entry_t *)((char *)(sfep) + XFS_ATTR_SF_ENTSIZE(sfep))) 68 #define XFS_ATTR_SF_TOTSIZE(dp) /* total space in use */ \ 69 (be16_to_cpu(((xfs_attr_shortform_t *) \ 70 ((dp)->i_afp->if_u1.if_data))->hdr.totsize)) 71 72 #if defined(XFS_ATTR_TRACE) 73 /* 74 * Kernel tracing support for attribute lists 75 */ 76 struct xfs_attr_list_context; 77 struct xfs_da_intnode; 78 struct xfs_da_node_entry; 79 struct xfs_attr_leafblock; 80 81 #define XFS_ATTR_TRACE_SIZE 4096 /* size of global trace buffer */ 82 extern ktrace_t *xfs_attr_trace_buf; 83 84 /* 85 * Trace record types. 86 */ 87 #define XFS_ATTR_KTRACE_L_C 1 /* context */ 88 #define XFS_ATTR_KTRACE_L_CN 2 /* context, node */ 89 #define XFS_ATTR_KTRACE_L_CB 3 /* context, btree */ 90 #define XFS_ATTR_KTRACE_L_CL 4 /* context, leaf */ 91 92 void xfs_attr_trace_l_c(char *where, struct xfs_attr_list_context *context); 93 void xfs_attr_trace_l_cn(char *where, struct xfs_attr_list_context *context, 94 struct xfs_da_intnode *node); 95 void xfs_attr_trace_l_cb(char *where, struct xfs_attr_list_context *context, 96 struct xfs_da_node_entry *btree); 97 void xfs_attr_trace_l_cl(char *where, struct xfs_attr_list_context *context, 98 struct xfs_attr_leafblock *leaf); 99 void xfs_attr_trace_enter(int type, char *where, 100 struct xfs_attr_list_context *context, 101 __psunsigned_t a13, __psunsigned_t a14, 102 __psunsigned_t a15); 103 #else 104 #define xfs_attr_trace_l_c(w,c) 105 #define xfs_attr_trace_l_cn(w,c,n) 106 #define xfs_attr_trace_l_cb(w,c,b) 107 #define xfs_attr_trace_l_cl(w,c,l) 108 #endif /* XFS_ATTR_TRACE */ 109 110 #endif /* __XFS_ATTR_SF_H__ */ 111