diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_attr_sf.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_attr_sf.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_attr_sf.h b/fs/xfs/libxfs/xfs_attr_sf.h new file mode 100644 index 000000000000..919756e3ba53 --- /dev/null +++ b/fs/xfs/libxfs/xfs_attr_sf.h | |||
| @@ -0,0 +1,70 @@ | |||
| 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 | /* | ||
| 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 */ | ||
| 33 | __be16 totsize; /* total bytes in shortform list */ | ||
| 34 | __u8 count; /* count of active entries */ | ||
| 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 */ | ||
| 55 | unsigned char *name; /* name value, pointer into buffer */ | ||
| 56 | } xfs_attr_sf_sort_t; | ||
| 57 | |||
| 58 | #define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen) /* space name/value uses */ \ | ||
| 59 | (((int)sizeof(xfs_attr_sf_entry_t)-1 + (nlen)+(vlen))) | ||
| 60 | #define XFS_ATTR_SF_ENTSIZE_MAX /* max space for name&value */ \ | ||
| 61 | ((1 << (NBBY*(int)sizeof(__uint8_t))) - 1) | ||
| 62 | #define XFS_ATTR_SF_ENTSIZE(sfep) /* space an entry uses */ \ | ||
| 63 | ((int)sizeof(xfs_attr_sf_entry_t)-1 + (sfep)->namelen+(sfep)->valuelen) | ||
| 64 | #define XFS_ATTR_SF_NEXTENTRY(sfep) /* next entry in struct */ \ | ||
| 65 | ((xfs_attr_sf_entry_t *)((char *)(sfep) + XFS_ATTR_SF_ENTSIZE(sfep))) | ||
| 66 | #define XFS_ATTR_SF_TOTSIZE(dp) /* total space in use */ \ | ||
| 67 | (be16_to_cpu(((xfs_attr_shortform_t *) \ | ||
| 68 | ((dp)->i_afp->if_u1.if_data))->hdr.totsize)) | ||
| 69 | |||
| 70 | #endif /* __XFS_ATTR_SF_H__ */ | ||