projects / thirdparty / xfsprogs-dev.git / blame
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|---|---|---|
| 9d6fabc0 DC |
1 | /* |
| 2 | * Copyright (c) 2013 Red Hat, Inc. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms of version 2.1 of the GNU Lesser General Public License | |
| 6 | * as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope that it would be useful, but | |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
| 11 | * | |
| 12 | * Further, this software is distributed without any warranty that it is | |
| 13 | * free of the rightful claim of any third person regarding infringement | |
| 14 | * or the like. Any license provided herein, whether implied or | |
| 15 | * otherwise, applies only to this software file. Patent licenses, if | |
| 16 | * any, provided herein do not apply to combinations of this program with | |
| 17 | * other software, or any other product whatsoever. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU Lesser General Public | |
| 20 | * License along with this program; if not, write the Free Software | |
| 21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, | |
| 22 | * USA. | |
| 23 | */ | |
| 24 | #ifndef __XFS_ATTR_REMOTE_H__ | |
| 25 | #define __XFS_ATTR_REMOTE_H__ | |
| 26 | ||
| 59915981 DC |
27 | #define XFS_ATTR3_RMT_MAGIC 0x5841524d /* XARM */ |
| 28 | ||
| f08bc2a9 DC |
29 | /* |
| 30 | * There is one of these headers per filesystem block in a remote attribute. | |
| 31 | * This is done to ensure there is a 1:1 mapping between the attribute value | |
| 32 | * length and the number of blocks needed to store the attribute. This makes the | |
| 33 | * verification of a buffer a little more complex, but greatly simplifies the | |
| 34 | * allocation, reading and writing of these attributes as we don't have to guess | |
| 35 | * the number of blocks needed to store the attribute data. | |
| 36 | */ | |
| 59915981 DC |
37 | struct xfs_attr3_rmt_hdr { |
| 38 | __be32 rm_magic; | |
| 39 | __be32 rm_offset; | |
| 40 | __be32 rm_bytes; | |
| 41 | __be32 rm_crc; | |
| 42 | uuid_t rm_uuid; | |
| 43 | __be64 rm_owner; | |
| 44 | __be64 rm_blkno; | |
| 45 | __be64 rm_lsn; | |
| 46 | }; | |
| 47 | ||
| 48 | #define XFS_ATTR3_RMT_CRC_OFF offsetof(struct xfs_attr3_rmt_hdr, rm_crc) | |
| 49 | ||
| 50 | #define XFS_ATTR3_RMT_BUF_SPACE(mp, bufsize) \ | |
| 51 | ((bufsize) - (xfs_sb_version_hascrc(&(mp)->m_sb) ? \ | |
| 52 | sizeof(struct xfs_attr3_rmt_hdr) : 0)) | |
| 53 | ||
| 8b4dc4a9 DC |
54 | extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; |
| 55 | ||
| f08bc2a9 DC |
56 | int xfs_attr3_rmt_blocks(struct xfs_mount *mp, int attrlen); |
| 57 | ||
| 9d6fabc0 DC |
58 | int xfs_attr_rmtval_get(struct xfs_da_args *args); |
| 59 | int xfs_attr_rmtval_set(struct xfs_da_args *args); | |
| 60 | int xfs_attr_rmtval_remove(struct xfs_da_args *args); | |
| 61 | ||
| 62 | #endif /* __XFS_ATTR_REMOTE_H__ */ |