1 | /* |
1 | /* |
2 | * libeio API header |
2 | * libeio API header |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008 Marc Alexander Lehmann <libeio@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libeio@schmorp.de> |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
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… | |
45 | #endif |
45 | #endif |
46 | |
46 | |
47 | #include <stddef.h> |
47 | #include <stddef.h> |
48 | #include <sys/types.h> |
48 | #include <sys/types.h> |
49 | |
49 | |
50 | typedef struct eio_req eio_req; |
50 | typedef struct eio_req eio_req; |
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51 | typedef struct eio_dirent eio_dirent; |
51 | |
52 | |
52 | typedef int (*eio_cb)(eio_req *req); |
53 | typedef int (*eio_cb)(eio_req *req); |
53 | |
54 | |
54 | #ifndef EIO_REQ_MEMBERS |
55 | #ifndef EIO_REQ_MEMBERS |
55 | # define EIO_REQ_MEMBERS |
56 | # define EIO_REQ_MEMBERS |
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57 | |
58 | |
58 | #ifndef EIO_STRUCT_STAT |
59 | #ifndef EIO_STRUCT_STAT |
59 | # define EIO_STRUCT_STAT struct stat |
60 | # define EIO_STRUCT_STAT struct stat |
60 | #endif |
61 | #endif |
61 | |
62 | |
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63 | /* for readdir */ |
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64 | |
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65 | /* eio_readdir flags */ |
62 | enum { |
66 | enum { |
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67 | EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */ |
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68 | EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */ |
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69 | EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */ |
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70 | EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */ |
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71 | |
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72 | EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */ |
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73 | EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */ |
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74 | }; |
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75 | |
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76 | /* using "typical" values in the hope that the compiler will do something sensible */ |
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77 | enum eio_dtype { |
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78 | EIO_DT_UNKNOWN = 0, |
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79 | EIO_DT_FIFO = 1, |
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80 | EIO_DT_CHR = 2, |
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81 | EIO_DT_MPC = 3, /* multiplexed char device (v7+Coherent) */ |
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82 | EIO_DT_DIR = 4, |
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83 | EIO_DT_NAM = 5, /* xenix special named file */ |
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84 | EIO_DT_BLK = 6, |
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85 | EIO_DT_MPB = 7, /* multiplexed block device (v7+coherent) */ |
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86 | EIO_DT_REG = 8, |
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87 | EIO_DT_NWK = 9, /* HP-UX network special */ |
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88 | EIO_DT_CMP = 9, /* VxFS compressed */ |
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89 | EIO_DT_LNK = 10, |
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90 | /* DT_SHAD = 11,*/ |
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91 | EIO_DT_SOCK = 12, |
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92 | EIO_DT_DOOR = 13, /* solaris door */ |
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93 | EIO_DT_WHT = 14, |
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94 | EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */ |
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95 | }; |
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96 | |
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97 | struct eio_dirent { |
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98 | char *name; |
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99 | ino_t inode; |
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100 | unsigned short namelen; |
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101 | unsigned char type; |
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102 | unsigned char score; /* internal use */ |
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103 | /* 0-4 bytes padding */ |
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104 | }; |
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105 | |
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106 | /* eio_sync_file_range flags */ |
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107 | |
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108 | enum { |
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109 | EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1, |
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110 | EIO_SYNC_FILE_RANGE_WRITE = 2, |
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111 | EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4 |
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112 | }; |
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113 | |
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114 | typedef double eio_tstamp; /* feel free to use double in your code directly */ |
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115 | |
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116 | /* the eio request structure */ |
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117 | |
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118 | enum { |
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119 | EIO_CUSTOM, |
63 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
120 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
64 | EIO_READ, EIO_WRITE, |
121 | EIO_READ, EIO_WRITE, |
65 | EIO_READAHEAD, EIO_SENDFILE, |
122 | EIO_READAHEAD, EIO_SENDFILE, |
66 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
123 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
67 | EIO_TRUNCATE, EIO_FTRUNCATE, |
124 | EIO_TRUNCATE, EIO_FTRUNCATE, |
68 | EIO_UTIME, EIO_FUTIME, |
125 | EIO_UTIME, EIO_FUTIME, |
69 | EIO_CHMOD, EIO_FCHMOD, |
126 | EIO_CHMOD, EIO_FCHMOD, |
70 | EIO_CHOWN, EIO_FCHOWN, |
127 | EIO_CHOWN, EIO_FCHOWN, |
71 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
128 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
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129 | EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, |
72 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
130 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
73 | EIO_MKNOD, EIO_READDIR, |
131 | EIO_MKNOD, EIO_READDIR, |
74 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
132 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
75 | EIO_GROUP, EIO_NOP, |
133 | EIO_GROUP, EIO_NOP, |
76 | EIO_BUSY, EIO_CUSTOM |
134 | EIO_BUSY |
77 | }; |
135 | }; |
78 | |
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79 | typedef double eio_tstamp; /* feel free to use double in your code directly */ |
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80 | |
136 | |
81 | /* eio request structure */ |
137 | /* eio request structure */ |
82 | /* this structure is mostly read-only */ |
138 | /* this structure is mostly read-only */ |
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139 | /* when initialising it, all members must be zero-initialised */ |
83 | struct eio_req |
140 | struct eio_req |
84 | { |
141 | { |
85 | eio_req volatile *next; /* private ETP */ |
142 | eio_req volatile *next; /* private ETP */ |
86 | |
143 | |
87 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
144 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
88 | off_t offs; /* read, write, truncate, readahead: file offset */ |
145 | off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset */ |
89 | size_t size; /* read, write, readahead, sendfile: length */ |
146 | size_t size; /* read, write, readahead, sendfile, msync, sync_file_range: length */ |
90 | void *ptr1; /* all applicable requests: pathname, old name */ |
147 | void *ptr1; /* all applicable requests: pathname, old name; readdir: possible output memory buffer */ |
91 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
148 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
92 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
149 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
93 | eio_tstamp nv2; /* utime, futime: mtime */ |
150 | eio_tstamp nv2; /* utime, futime: mtime */ |
94 | |
151 | |
95 | int type; /* EIO_xxx constant ETP */ |
152 | int type; /* EIO_xxx constant ETP */ |
96 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open: flags */ |
153 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, readdir: flags */ |
97 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ |
154 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */ |
98 | long int3; /* chown, fchown: gid; mknod: dev_t */ |
155 | long int3; /* chown, fchown: gid; mknod: dev_t */ |
99 | int errorno; /* errno value on syscall return */ |
156 | int errorno; /* errno value on syscall return */ |
100 | |
157 | |
101 | unsigned char flags; /* private */ |
158 | unsigned char flags; /* private */ |
102 | signed char pri; /* the priority */ |
159 | signed char pri; /* the priority */ |
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109 | EIO_REQ_MEMBERS |
166 | EIO_REQ_MEMBERS |
110 | |
167 | |
111 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
168 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
112 | }; |
169 | }; |
113 | |
170 | |
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171 | /* _private_ flags */ |
114 | enum { |
172 | enum { |
115 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
173 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
116 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
174 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
117 | EIO_FLAG_PTR2_FREE = 0x04 /* need to free(ptr2) */ |
175 | EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */ |
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176 | EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */ |
118 | }; |
177 | }; |
119 | |
178 | |
120 | enum { |
179 | enum { |
121 | EIO_PRI_MIN = -4, |
180 | EIO_PRI_MIN = -4, |
122 | EIO_PRI_MAX = 4, |
181 | EIO_PRI_MAX = 4, |
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158 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
217 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
159 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
218 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
160 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
219 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
161 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
220 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
162 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
221 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
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222 | eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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223 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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224 | eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); |
163 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
225 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
164 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
226 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
165 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
227 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
166 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
228 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
167 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
229 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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175 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
237 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
176 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); |
238 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); |
177 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
239 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
178 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
240 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
179 | eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
241 | eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
180 | eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
242 | eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
181 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
243 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
182 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
244 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
183 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
245 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
184 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
246 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
185 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
247 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |