projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 7b718769 NS |
2 | * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. | |
| 1da177e4 | 4 | * |
| 7b718769 NS |
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 | |
| 1da177e4 LT |
7 | * published by the Free Software Foundation. |
| 8 | * | |
| 7b718769 NS |
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. | |
| 1da177e4 | 13 | * |
| 7b718769 NS |
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 | |
| 1da177e4 LT |
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 | ||
| 1da177e4 LT |
28 | /* |
| 29 | * Entries are packed toward the top as tight as possible. | |
| 30 | */ | |
| 31 | typedef struct xfs_attr_shortform { | |
| 32 | struct xfs_attr_sf_hdr { /* constant-structure header block */ | |
| 3b244aa8 NS |
33 | __be16 totsize; /* total bytes in shortform list */ |
| 34 | __u8 count; /* count of active entries */ | |
| 1da177e4 LT |
35 | } hdr; |
| 36 | struct xfs_attr_sf_entry { | |
| 37 | __uint8_t namelen; /* actual length of name (no NULL) */ | |
| 38 | __uint8_t valuelen; /* actual length of value (no NULL) */ | |
| 39 | __uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */ | |
| 40 | __uint8_t nameval[1]; /* name & value bytes concatenated */ | |
| 41 | } list[1]; /* variable sized array */ | |
| 42 | } xfs_attr_shortform_t; | |
| 43 | typedef struct xfs_attr_sf_hdr xfs_attr_sf_hdr_t; | |
| 44 | typedef struct xfs_attr_sf_entry xfs_attr_sf_entry_t; | |
| 45 | ||
| 46 | /* | |
| 47 | * We generate this then sort it, attr_list() must return things in hash-order. | |
| 48 | */ | |
| 49 | typedef struct xfs_attr_sf_sort { | |
| 50 | __uint8_t entno; /* entry number in original list */ | |
| 51 | __uint8_t namelen; /* length of name value (no null) */ | |
| 52 | __uint8_t valuelen; /* length of value */ | |
| 53 | __uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */ | |
| 54 | xfs_dahash_t hash; /* this entry's hash value */ | |
| a9273ca5 | 55 | unsigned char *name; /* name value, pointer into buffer */ |
| 1da177e4 LT |
56 | } xfs_attr_sf_sort_t; |
| 57 | ||
| 1da177e4 | 58 | #define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen) /* space name/value uses */ \ |
| a844f451 | 59 | (((int)sizeof(xfs_attr_sf_entry_t)-1 + (nlen)+(vlen))) |
| 1da177e4 LT |
60 | #define XFS_ATTR_SF_ENTSIZE_MAX /* max space for name&value */ \ |
| 61 | ((1 << (NBBY*(int)sizeof(__uint8_t))) - 1) | |
| 1da177e4 LT |
62 | #define XFS_ATTR_SF_ENTSIZE(sfep) /* space an entry uses */ \ |
| 63 | ((int)sizeof(xfs_attr_sf_entry_t)-1 + (sfep)->namelen+(sfep)->valuelen) | |
| 1da177e4 | 64 | #define XFS_ATTR_SF_NEXTENTRY(sfep) /* next entry in struct */ \ |
| a844f451 | 65 | ((xfs_attr_sf_entry_t *)((char *)(sfep) + XFS_ATTR_SF_ENTSIZE(sfep))) |
| 1da177e4 | 66 | #define XFS_ATTR_SF_TOTSIZE(dp) /* total space in use */ \ |
| 3b244aa8 NS |
67 | (be16_to_cpu(((xfs_attr_shortform_t *) \ |
| 68 | ((dp)->i_afp->if_u1.if_data))->hdr.totsize)) | |
| 1da177e4 | 69 | |
| 1da177e4 | 70 | #endif /* __XFS_ATTR_SF_H__ */ |