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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; |
47 | |
51 | |
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54 | #ifndef EIO_STRUCT_STAT |
58 | #ifndef EIO_STRUCT_STAT |
55 | # define EIO_STRUCT_STAT struct stat |
59 | # define EIO_STRUCT_STAT struct stat |
56 | #endif |
60 | #endif |
57 | |
61 | |
58 | enum { |
62 | enum { |
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63 | EIO_CUSTOM, |
59 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
64 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
60 | EIO_READ, EIO_WRITE, |
65 | EIO_READ, EIO_WRITE, |
61 | EIO_READAHEAD, EIO_SENDFILE, |
66 | EIO_READAHEAD, EIO_SENDFILE, |
62 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
67 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
63 | EIO_TRUNCATE, EIO_FTRUNCATE, |
68 | EIO_TRUNCATE, EIO_FTRUNCATE, |
64 | EIO_UTIME, EIO_FUTIME, |
69 | EIO_UTIME, EIO_FUTIME, |
65 | EIO_CHMOD, EIO_FCHMOD, |
70 | EIO_CHMOD, EIO_FCHMOD, |
66 | EIO_CHOWN, EIO_FCHOWN, |
71 | EIO_CHOWN, EIO_FCHOWN, |
67 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
72 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
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73 | EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, |
68 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
74 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
69 | EIO_MKNOD, EIO_READDIR, |
75 | EIO_MKNOD, EIO_READDIR, |
70 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
76 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
71 | EIO_GROUP, EIO_NOP, |
77 | EIO_GROUP, EIO_NOP, |
72 | EIO_BUSY, |
78 | EIO_BUSY |
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79 | }; |
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80 | |
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81 | /* eio_sync_file_range flags */ |
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82 | |
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83 | enum { |
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84 | EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1, |
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85 | EIO_SYNC_FILE_RANGE_WRITE = 2, |
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86 | EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4 |
73 | }; |
87 | }; |
74 | |
88 | |
75 | typedef double eio_tstamp; /* feel free to use double in your code directly */ |
89 | typedef double eio_tstamp; /* feel free to use double in your code directly */ |
76 | |
90 | |
77 | /* eio request structure */ |
91 | /* eio request structure */ |
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79 | struct eio_req |
93 | struct eio_req |
80 | { |
94 | { |
81 | eio_req volatile *next; /* private ETP */ |
95 | eio_req volatile *next; /* private ETP */ |
82 | |
96 | |
83 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
97 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
84 | off_t offs; /* read, write, truncate, readahead: file offset; mknod: dev_t */ |
98 | off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset */ |
85 | size_t size; /* read, write, readahead, sendfile: length */ |
99 | size_t size; /* read, write, readahead, sendfile, msync, sync_file_range: length */ |
86 | void *ptr1; /* all applicable requests: pathname, old name */ |
100 | void *ptr1; /* all applicable requests: pathname, old name */ |
87 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
101 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
88 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
102 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
89 | eio_tstamp nv2; /* utime, futime: mtime */ |
103 | eio_tstamp nv2; /* utime, futime: mtime */ |
90 | |
104 | |
91 | int type; /* EIO_xxx constant ETP */ |
105 | int type; /* EIO_xxx constant ETP */ |
92 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open: flags */ |
106 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync: flags */ |
93 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ |
107 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */ |
94 | long int3; /* chown, fchown: gid */ |
108 | long int3; /* chown, fchown: gid; mknod: dev_t */ |
95 | int errorno; /* errno value on syscall return */ |
109 | int errorno; /* errno value on syscall return */ |
96 | |
110 | |
97 | unsigned char flags; /* private */ |
111 | unsigned char flags; /* private */ |
98 | signed char pri; /* the priority */ |
112 | signed char pri; /* the priority */ |
99 | |
113 | |
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105 | EIO_REQ_MEMBERS |
119 | EIO_REQ_MEMBERS |
106 | |
120 | |
107 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
121 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
108 | }; |
122 | }; |
109 | |
123 | |
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124 | /* _private_ flags */ |
110 | enum { |
125 | enum { |
111 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
126 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
112 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
127 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
113 | EIO_FLAG_PTR2_FREE = 0x04 /* need to free(ptr2) */ |
128 | EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */ |
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129 | EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */ |
114 | }; |
130 | }; |
115 | |
131 | |
116 | enum { |
132 | enum { |
117 | EIO_PRI_MIN = -4, |
133 | EIO_PRI_MIN = -4, |
118 | EIO_PRI_MAX = 4, |
134 | EIO_PRI_MAX = 4, |
119 | |
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120 | EIO_PRI_DEFAULT = 0, |
135 | EIO_PRI_DEFAULT = 0, |
121 | }; |
136 | }; |
122 | |
137 | |
123 | /* returns < 0 on error, errno set |
138 | /* returns < 0 on error, errno set |
124 | * need_poll, if non-zero, will be called when results are available |
139 | * need_poll, if non-zero, will be called when results are available |
125 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
140 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
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155 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
170 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
156 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
171 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
157 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
172 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
158 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
173 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
159 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
174 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
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175 | eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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176 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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177 | eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); |
160 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
178 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
161 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
179 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
162 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
180 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
163 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
181 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
164 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
182 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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182 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
200 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
183 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
201 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
184 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
202 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
185 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
203 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
186 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
204 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
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205 | eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data); |
187 | #endif |
206 | #endif |
188 | |
207 | |
189 | /*****************************************************************************/ |
208 | /*****************************************************************************/ |
190 | /* groups */ |
209 | /* groups */ |
191 | |
210 | |
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217 | /*****************************************************************************/ |
236 | /*****************************************************************************/ |
218 | /* convinience functions */ |
237 | /* convinience functions */ |
219 | |
238 | |
220 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
239 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
221 | |
240 | |
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241 | #ifdef __cplusplus |
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242 | } |
222 | #endif |
243 | #endif |
223 | |
244 | |
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245 | #endif |
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246 | |