projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
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|---|---|---|
| 95920cd6 DC |
1 | /* |
| 2 | * Copyright (c) 2013 Red Hat, 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_REMOTE_H__ | |
| 19 | #define __XFS_ATTR_REMOTE_H__ | |
| 20 | ||
| d2e448d5 DC |
21 | #define XFS_ATTR3_RMT_MAGIC 0x5841524d /* XARM */ |
| 22 | ||
| 7bc0dc27 DC |
23 | /* |
| 24 | * There is one of these headers per filesystem block in a remote attribute. | |
| 25 | * This is done to ensure there is a 1:1 mapping between the attribute value | |
| 26 | * length and the number of blocks needed to store the attribute. This makes the | |
| 27 | * verification of a buffer a little more complex, but greatly simplifies the | |
| 28 | * allocation, reading and writing of these attributes as we don't have to guess | |
| 29 | * the number of blocks needed to store the attribute data. | |
| 30 | */ | |
| d2e448d5 DC |
31 | struct xfs_attr3_rmt_hdr { |
| 32 | __be32 rm_magic; | |
| 33 | __be32 rm_offset; | |
| 34 | __be32 rm_bytes; | |
| 35 | __be32 rm_crc; | |
| 36 | uuid_t rm_uuid; | |
| 37 | __be64 rm_owner; | |
| 38 | __be64 rm_blkno; | |
| 39 | __be64 rm_lsn; | |
| 40 | }; | |
| 41 | ||
| 42 | #define XFS_ATTR3_RMT_CRC_OFF offsetof(struct xfs_attr3_rmt_hdr, rm_crc) | |
| 43 | ||
| 44 | #define XFS_ATTR3_RMT_BUF_SPACE(mp, bufsize) \ | |
| 45 | ((bufsize) - (xfs_sb_version_hascrc(&(mp)->m_sb) ? \ | |
| 46 | sizeof(struct xfs_attr3_rmt_hdr) : 0)) | |
| 47 | ||
| d75afeb3 DC |
48 | extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; |
| 49 | ||
| 7bc0dc27 DC |
50 | int xfs_attr3_rmt_blocks(struct xfs_mount *mp, int attrlen); |
| 51 | ||
| 95920cd6 DC |
52 | int xfs_attr_rmtval_get(struct xfs_da_args *args); |
| 53 | int xfs_attr_rmtval_set(struct xfs_da_args *args); | |
| 54 | int xfs_attr_rmtval_remove(struct xfs_da_args *args); | |
| 55 | ||
| 56 | #endif /* __XFS_ATTR_REMOTE_H__ */ |