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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38 | */ |
38 | */ |
39 | |
39 | |
40 | #ifndef EIO_H_ |
40 | #ifndef EIO_H_ |
41 | #define EIO_H_ |
41 | #define EIO_H_ |
42 | |
42 | |
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43 | #ifdef __cplusplus |
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44 | extern "C" { |
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45 | #endif |
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46 | |
43 | #include <stddef.h> |
47 | #include <stddef.h> |
44 | #include <sys/types.h> |
48 | #include <sys/types.h> |
45 | |
49 | |
46 | typedef struct eio_req eio_req; |
50 | typedef struct eio_req eio_req; |
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51 | typedef struct eio_dirent eio_dirent; |
47 | |
52 | |
48 | typedef int (*eio_cb)(eio_req *req); |
53 | typedef int (*eio_cb)(eio_req *req); |
49 | |
54 | |
50 | #ifndef EIO_REQ_MEMBERS |
55 | #ifndef EIO_REQ_MEMBERS |
51 | # define EIO_REQ_MEMBERS |
56 | # define EIO_REQ_MEMBERS |
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53 | |
58 | |
54 | #ifndef EIO_STRUCT_STAT |
59 | #ifndef EIO_STRUCT_STAT |
55 | # define EIO_STRUCT_STAT struct stat |
60 | # define EIO_STRUCT_STAT struct stat |
56 | #endif |
61 | #endif |
57 | |
62 | |
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63 | /* for readdir */ |
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64 | |
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65 | /* eio_readdir flags */ |
58 | 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_DIR = 4, |
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82 | EIO_DT_BLK = 6, |
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83 | EIO_DT_REG = 8, |
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84 | EIO_DT_LNK = 10, |
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85 | EIO_DT_SOCK = 12, |
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86 | EIO_DT_WHT = 14, |
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87 | EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */ |
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88 | }; |
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89 | |
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90 | struct eio_dirent { |
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91 | char *name; |
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92 | ino_t inode; |
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93 | unsigned short namelen; |
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94 | unsigned char type; |
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95 | unsigned char score; /* internal use */ |
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96 | /* 0-4 bytes padding */ |
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97 | }; |
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98 | |
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99 | /* eio_sync_file_range flags */ |
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100 | |
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101 | enum { |
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102 | EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1, |
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103 | EIO_SYNC_FILE_RANGE_WRITE = 2, |
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104 | EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4 |
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105 | }; |
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106 | |
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107 | typedef double eio_tstamp; /* feel free to use double in your code directly */ |
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108 | |
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109 | /* the eio request structure */ |
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110 | |
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111 | enum { |
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112 | EIO_CUSTOM, |
59 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
113 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
60 | EIO_READ, EIO_WRITE, |
114 | EIO_READ, EIO_WRITE, |
61 | EIO_READAHEAD, EIO_SENDFILE, |
115 | EIO_READAHEAD, EIO_SENDFILE, |
62 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
116 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
63 | EIO_TRUNCATE, EIO_FTRUNCATE, |
117 | EIO_TRUNCATE, EIO_FTRUNCATE, |
64 | EIO_UTIME, EIO_FUTIME, |
118 | EIO_UTIME, EIO_FUTIME, |
65 | EIO_CHMOD, EIO_FCHMOD, |
119 | EIO_CHMOD, EIO_FCHMOD, |
66 | EIO_CHOWN, EIO_FCHOWN, |
120 | EIO_CHOWN, EIO_FCHOWN, |
67 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
121 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
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122 | EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, |
68 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
123 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
69 | EIO_MKNOD, EIO_READDIR, |
124 | EIO_MKNOD, EIO_READDIR, |
70 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
125 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
71 | EIO_GROUP, EIO_NOP, |
126 | EIO_GROUP, EIO_NOP, |
72 | EIO_BUSY, EIO_CUSTOM |
127 | EIO_BUSY |
73 | }; |
128 | }; |
74 | |
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75 | typedef double eio_tstamp; /* feel free to use double in your code directly */ |
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76 | |
129 | |
77 | /* eio request structure */ |
130 | /* eio request structure */ |
78 | /* this structure is mostly read-only */ |
131 | /* this structure is mostly read-only */ |
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132 | /* when initialising it, all members must be zero-initialised */ |
79 | struct eio_req |
133 | struct eio_req |
80 | { |
134 | { |
81 | eio_req volatile *next; /* private ETP */ |
135 | eio_req volatile *next; /* private ETP */ |
82 | |
136 | |
83 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
137 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
84 | off_t offs; /* read, write, truncate, readahead: file offset; mknod: dev_t */ |
138 | off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset */ |
85 | size_t size; /* read, write, readahead, sendfile: length */ |
139 | size_t size; /* read, write, readahead, sendfile, msync, sync_file_range: length */ |
86 | void *ptr1; /* all applicable requests: pathname, old name */ |
140 | void *ptr1; /* all applicable requests: pathname, old name */ |
87 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
141 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
88 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
142 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
89 | eio_tstamp nv2; /* utime, futime: mtime */ |
143 | eio_tstamp nv2; /* utime, futime: mtime */ |
90 | |
144 | |
91 | int type; /* EIO_xxx constant ETP */ |
145 | int type; /* EIO_xxx constant ETP */ |
92 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open: flags */ |
146 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, readdir: flags */ |
93 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ |
147 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */ |
94 | long int3; /* chown, fchown: gid */ |
148 | long int3; /* chown, fchown: gid; mknod: dev_t */ |
95 | int errorno; /* errno value on syscall return */ |
149 | int errorno; /* errno value on syscall return */ |
96 | |
150 | |
97 | unsigned char flags; /* private */ |
151 | unsigned char flags; /* private */ |
98 | signed char pri; /* the priority */ |
152 | signed char pri; /* the priority */ |
99 | |
153 | |
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105 | EIO_REQ_MEMBERS |
159 | EIO_REQ_MEMBERS |
106 | |
160 | |
107 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
161 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
108 | }; |
162 | }; |
109 | |
163 | |
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164 | /* _private_ flags */ |
110 | enum { |
165 | enum { |
111 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
166 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
112 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
167 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
113 | EIO_FLAG_PTR2_FREE = 0x04 /* need to free(ptr2) */ |
168 | EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */ |
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169 | EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */ |
114 | }; |
170 | }; |
115 | |
171 | |
116 | enum { |
172 | enum { |
117 | EIO_PRI_MIN = -4, |
173 | EIO_PRI_MIN = -4, |
118 | EIO_PRI_MAX = 4, |
174 | EIO_PRI_MAX = 4, |
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154 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
210 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
155 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
211 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
156 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
212 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
157 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
213 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
158 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
214 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
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215 | eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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216 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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217 | eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); |
159 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
218 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
160 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
219 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
161 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
220 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
162 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
221 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
163 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
222 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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171 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
230 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
172 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); |
231 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); |
173 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
232 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
174 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
233 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
175 | eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
234 | eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
176 | eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
235 | eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
177 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
236 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
178 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
237 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
179 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
238 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
180 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
239 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
181 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
240 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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217 | /*****************************************************************************/ |
276 | /*****************************************************************************/ |
218 | /* convinience functions */ |
277 | /* convinience functions */ |
219 | |
278 | |
220 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
279 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
221 | |
280 | |
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281 | #ifdef __cplusplus |
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282 | } |
222 | #endif |
283 | #endif |
223 | |
284 | |
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285 | #endif |
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286 | |