| Mike Marshall | f7ab093 | 2015-07-17 10:38:11 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * (C) 2001 Clemson University and The University of Chicago |
| 3 | * |
| 4 | * See COPYING in top-level directory. |
| 5 | */ |
| 6 | |
| 7 | #ifndef _PVFS2_DEV_PROTO_H |
| 8 | #define _PVFS2_DEV_PROTO_H |
| 9 | |
| 10 | /* |
| 11 | * types and constants shared between user space and kernel space for |
| 12 | * device interaction using a common protocol |
| 13 | */ |
| 14 | |
| 15 | /* |
| 16 | * valid pvfs2 kernel operation types |
| 17 | */ |
| 18 | #define PVFS2_VFS_OP_INVALID 0xFF000000 |
| 19 | #define PVFS2_VFS_OP_FILE_IO 0xFF000001 |
| 20 | #define PVFS2_VFS_OP_LOOKUP 0xFF000002 |
| 21 | #define PVFS2_VFS_OP_CREATE 0xFF000003 |
| 22 | #define PVFS2_VFS_OP_GETATTR 0xFF000004 |
| 23 | #define PVFS2_VFS_OP_REMOVE 0xFF000005 |
| 24 | #define PVFS2_VFS_OP_MKDIR 0xFF000006 |
| 25 | #define PVFS2_VFS_OP_READDIR 0xFF000007 |
| 26 | #define PVFS2_VFS_OP_SETATTR 0xFF000008 |
| 27 | #define PVFS2_VFS_OP_SYMLINK 0xFF000009 |
| 28 | #define PVFS2_VFS_OP_RENAME 0xFF00000A |
| 29 | #define PVFS2_VFS_OP_STATFS 0xFF00000B |
| 30 | #define PVFS2_VFS_OP_TRUNCATE 0xFF00000C |
| 31 | #define PVFS2_VFS_OP_MMAP_RA_FLUSH 0xFF00000D |
| 32 | #define PVFS2_VFS_OP_FS_MOUNT 0xFF00000E |
| 33 | #define PVFS2_VFS_OP_FS_UMOUNT 0xFF00000F |
| 34 | #define PVFS2_VFS_OP_GETXATTR 0xFF000010 |
| 35 | #define PVFS2_VFS_OP_SETXATTR 0xFF000011 |
| 36 | #define PVFS2_VFS_OP_LISTXATTR 0xFF000012 |
| 37 | #define PVFS2_VFS_OP_REMOVEXATTR 0xFF000013 |
| 38 | #define PVFS2_VFS_OP_PARAM 0xFF000014 |
| 39 | #define PVFS2_VFS_OP_PERF_COUNT 0xFF000015 |
| 40 | #define PVFS2_VFS_OP_CANCEL 0xFF00EE00 |
| 41 | #define PVFS2_VFS_OP_FSYNC 0xFF00EE01 |
| 42 | #define PVFS2_VFS_OP_FSKEY 0xFF00EE02 |
| 43 | #define PVFS2_VFS_OP_READDIRPLUS 0xFF00EE03 |
| 44 | #define PVFS2_VFS_OP_FILE_IOX 0xFF00EE04 |
| 45 | |
| 46 | /* |
| 47 | * Misc constants. Please retain them as multiples of 8! |
| 48 | * Otherwise 32-64 bit interactions will be messed up :) |
| 49 | */ |
| 50 | #define PVFS2_NAME_LEN 0x00000100 |
| 51 | #define PVFS2_MAX_DEBUG_STRING_LEN 0x00000400 |
| 52 | #define PVFS2_MAX_DEBUG_ARRAY_LEN 0x00000800 |
| 53 | |
| 54 | /* |
| 55 | * MAX_DIRENT_COUNT cannot be larger than PVFS_REQ_LIMIT_LISTATTR. |
| 56 | * The value of PVFS_REQ_LIMIT_LISTATTR has been changed from 113 to 60 |
| 57 | * to accomodate an attribute object with mirrored handles. |
| 58 | * MAX_DIRENT_COUNT is replaced by MAX_DIRENT_COUNT_READDIR and |
| 59 | * MAX_DIRENT_COUNT_READDIRPLUS, since readdir doesn't trigger a listattr |
| 60 | * but readdirplus might. |
| 61 | */ |
| 62 | #define MAX_DIRENT_COUNT_READDIR 0x00000060 |
| 63 | #define MAX_DIRENT_COUNT_READDIRPLUS 0x0000003C |
| 64 | |
| 65 | #include "upcall.h" |
| 66 | #include "downcall.h" |
| 67 | |
| 68 | /* |
| 69 | * These macros differ from proto macros in that they don't do any |
| 70 | * byte-swappings and are used to ensure that kernel-clientcore interactions |
| 71 | * don't cause any unaligned accesses etc on 64 bit machines |
| 72 | */ |
| 73 | #ifndef roundup4 |
| 74 | #define roundup4(x) (((x)+3) & ~3) |
| 75 | #endif |
| 76 | |
| 77 | #ifndef roundup8 |
| 78 | #define roundup8(x) (((x)+7) & ~7) |
| 79 | #endif |
| 80 | |
| 81 | /* strings; decoding just points into existing character data */ |
| 82 | #define enc_string(pptr, pbuf) do { \ |
| 83 | __u32 len = strlen(*pbuf); \ |
| 84 | *(__u32 *) *(pptr) = (len); \ |
| 85 | memcpy(*(pptr)+4, *pbuf, len+1); \ |
| 86 | *(pptr) += roundup8(4 + len + 1); \ |
| 87 | } while (0) |
| 88 | |
| 89 | #define dec_string(pptr, pbuf, plen) do { \ |
| 90 | __u32 len = (*(__u32 *) *(pptr)); \ |
| 91 | *pbuf = *(pptr) + 4; \ |
| 92 | *(pptr) += roundup8(4 + len + 1); \ |
| 93 | if (plen) \ |
| 94 | *plen = len;\ |
| 95 | } while (0) |
| 96 | |
| 97 | struct read_write_x { |
| 98 | __s64 off; |
| 99 | __s64 len; |
| 100 | }; |
| 101 | |
| 102 | #endif |