… | |
… | |
165 | fiemap (eio_req *req) |
165 | fiemap (eio_req *req) |
166 | { |
166 | { |
167 | req->result = -1; |
167 | req->result = -1; |
168 | |
168 | |
169 | #if HAVE_FIEMAP |
169 | #if HAVE_FIEMAP |
|
|
170 | /* assume some c99 */ |
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|
171 | struct fiemap *fiemap = 0; |
|
|
172 | size_t end_offset; |
170 | int count = req->int3; |
173 | int count = req->int3; |
171 | |
174 | |
172 | /* heuristic: first try with 64 extents if we don't know how many, */ |
175 | req->flags |= EIO_FLAG_PTR1_FREE; |
173 | /* as most files have (hopefully) fewer than this many extents */ |
176 | |
174 | /* in fact, most should have <= 2, so maybe the 72 below is probably overkill */ |
177 | /* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */ |
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|
178 | /* increase in 3.5kb steps */ |
175 | if (count < 0) |
179 | if (count < 0) |
176 | count = 72; /* for what it's worth, 72 extents fit nicely into 4kb */ |
180 | count = 8; |
|
|
181 | |
|
|
182 | fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count); |
|
|
183 | errno = ENOMEM; |
|
|
184 | if (!fiemap) |
|
|
185 | return; |
|
|
186 | |
|
|
187 | req->ptr1 = fiemap; |
|
|
188 | |
|
|
189 | fiemap->fm_start = req->offs; |
|
|
190 | fiemap->fm_length = req->size; |
|
|
191 | fiemap->fm_flags = req->int2; |
|
|
192 | fiemap->fm_extent_count = count; |
|
|
193 | |
|
|
194 | if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap)) |
|
|
195 | return; |
|
|
196 | |
|
|
197 | if (req->int3 >= 0 /* not autosizing */ |
|
|
198 | || !fiemap->fm_mapped_extents /* no more extents */ |
|
|
199 | || fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */) |
|
|
200 | goto done; |
|
|
201 | |
|
|
202 | /* else we have to loop - |
|
|
203 | * it would be tempting (atcually I tried that first) to just query the |
|
|
204 | * number of extents needed, but linux often feels like not returning all |
|
|
205 | * extents, without telling us it left any out. this complicates |
|
|
206 | * this quite a bit. |
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|
207 | */ |
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|
208 | |
|
|
209 | end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start); |
177 | |
210 | |
178 | for (;;) |
211 | for (;;) |
179 | { |
212 | { |
|
|
213 | /* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */ |
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|
214 | char scratch[3072]; |
|
|
215 | struct fiemap *incmap = (struct fiemap *)scratch; |
|
|
216 | |
|
|
217 | incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical |
|
|
218 | + fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length; |
|
|
219 | incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start); |
|
|
220 | incmap->fm_flags = fiemap->fm_flags; |
|
|
221 | incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent); |
|
|
222 | |
|
|
223 | if (ioctl (req->int1, FS_IOC_FIEMAP, incmap)) |
|
|
224 | return; |
|
|
225 | |
|
|
226 | count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents; |
180 | struct fiemap *fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count); |
227 | fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count); |
181 | errno = ENOMEM; |
228 | errno = ENOMEM; |
182 | if (!fiemap) |
229 | if (!fiemap) |
183 | return; |
230 | return; |
184 | |
231 | |
185 | req->ptr1 = fiemap; |
232 | req->ptr1 = fiemap; |
186 | req->flags |= EIO_FLAG_PTR1_FREE; |
|
|
187 | |
233 | |
188 | fiemap->fm_start = req->offs; |
234 | for (count = 0; count < incmap->fm_mapped_extents; ++count) |
189 | fiemap->fm_length = req->size; |
235 | { |
190 | fiemap->fm_flags = req->int2; |
236 | struct fiemap_extent *e = incmap->fm_extents + count; |
191 | fiemap->fm_extent_count = count; |
|
|
192 | |
237 | |
193 | if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap)) |
238 | if (e->fe_logical + e->fe_length >= end_offset) |
194 | return; |
239 | goto done; |
195 | |
240 | |
196 | if (req->int3 >= 0) |
241 | fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e; |
197 | break; /* when not autosizing we are done */ |
|
|
198 | |
242 | |
199 | if (fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST) |
243 | if (e->fe_flags & FIEMAP_EXTENT_LAST) |
200 | break; /* autosizing successful, we are done */ |
244 | goto done; |
201 | |
245 | |
202 | fiemap->fm_flags = req->int2; |
246 | } |
203 | fiemap->fm_extent_count = 0; |
|
|
204 | |
|
|
205 | if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap)) |
|
|
206 | return; |
|
|
207 | |
|
|
208 | count = fiemap->fm_mapped_extents; |
|
|
209 | |
|
|
210 | free (fiemap); |
|
|
211 | } |
247 | } |
212 | |
248 | |
|
|
249 | done: |
213 | req->result = 0; |
250 | req->result = 0; |
214 | |
251 | |
215 | #else |
252 | #else |
216 | errno = ENOSYS; |
253 | errno = ENOSYS; |
217 | #endif |
254 | #endif |
… | |
… | |
1094 | aio_fsync = EIO_FSYNC |
1131 | aio_fsync = EIO_FSYNC |
1095 | aio_fdatasync = EIO_FDATASYNC |
1132 | aio_fdatasync = EIO_FDATASYNC |
1096 | aio_syncfs = EIO_SYNCFS |
1133 | aio_syncfs = EIO_SYNCFS |
1097 | PPCODE: |
1134 | PPCODE: |
1098 | { |
1135 | { |
1099 | int fd = s_fileno_croak (fh, 0); |
1136 | int fd = s_fileno_croak (fh, 0); |
1100 | dREQ; |
1137 | dREQ; |
1101 | |
1138 | |
1102 | req->type = ix; |
1139 | req->type = ix; |
1103 | req->sv1 = newSVsv (fh); |
1140 | req->sv1 = newSVsv (fh); |
1104 | req->int1 = fd; |
1141 | req->int1 = fd; |
… | |
… | |
1108 | |
1145 | |
1109 | void |
1146 | void |
1110 | aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef) |
1147 | aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef) |
1111 | PPCODE: |
1148 | PPCODE: |
1112 | { |
1149 | { |
1113 | int fd = s_fileno_croak (fh, 0); |
1150 | int fd = s_fileno_croak (fh, 0); |
1114 | dREQ; |
1151 | dREQ; |
1115 | |
1152 | |
1116 | req->type = EIO_SYNC_FILE_RANGE; |
1153 | req->type = EIO_SYNC_FILE_RANGE; |
1117 | req->sv1 = newSVsv (fh); |
1154 | req->sv1 = newSVsv (fh); |
1118 | req->int1 = fd; |
1155 | req->int1 = fd; |
… | |
… | |
1125 | |
1162 | |
1126 | void |
1163 | void |
1127 | aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef) |
1164 | aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef) |
1128 | PPCODE: |
1165 | PPCODE: |
1129 | { |
1166 | { |
1130 | int fd = s_fileno_croak (fh, 0); |
1167 | int fd = s_fileno_croak (fh, 0); |
1131 | dREQ; |
1168 | dREQ; |
1132 | |
1169 | |
1133 | req->type = EIO_FALLOCATE; |
1170 | req->type = EIO_FALLOCATE; |
1134 | req->sv1 = newSVsv (fh); |
1171 | req->sv1 = newSVsv (fh); |
1135 | req->int1 = fd; |
1172 | req->int1 = fd; |
… | |
… | |
1143 | void |
1180 | void |
1144 | aio_close (SV *fh, SV *callback=&PL_sv_undef) |
1181 | aio_close (SV *fh, SV *callback=&PL_sv_undef) |
1145 | PPCODE: |
1182 | PPCODE: |
1146 | { |
1183 | { |
1147 | static int close_fd = -1; /* dummy fd to close fds via dup2 */ |
1184 | static int close_fd = -1; /* dummy fd to close fds via dup2 */ |
1148 | int fd = s_fileno_croak (fh, 0); |
1185 | int fd = s_fileno_croak (fh, 0); |
1149 | dREQ; |
1186 | dREQ; |
1150 | |
1187 | |
1151 | if (expect_false (close_fd < 0)) |
1188 | if (expect_false (close_fd < 0)) |
1152 | { |
1189 | { |
1153 | int pipefd [2]; |
1190 | int pipefd [2]; |
… | |
… | |
1263 | |
1300 | |
1264 | void |
1301 | void |
1265 | aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef) |
1302 | aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef) |
1266 | PPCODE: |
1303 | PPCODE: |
1267 | { |
1304 | { |
1268 | int ifd = s_fileno_croak (in_fh , 0); |
1305 | int ifd = s_fileno_croak (in_fh , 0); |
1269 | int ofd = s_fileno_croak (out_fh, 1); |
1306 | int ofd = s_fileno_croak (out_fh, 1); |
1270 | dREQ; |
1307 | dREQ; |
1271 | |
1308 | |
1272 | req->type = EIO_SENDFILE; |
1309 | req->type = EIO_SENDFILE; |
1273 | req->sv1 = newSVsv (out_fh); |
1310 | req->sv1 = newSVsv (out_fh); |
1274 | req->int1 = ofd; |
1311 | req->int1 = ofd; |
… | |
… | |
1282 | |
1319 | |
1283 | void |
1320 | void |
1284 | aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef) |
1321 | aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef) |
1285 | PPCODE: |
1322 | PPCODE: |
1286 | { |
1323 | { |
1287 | int fd = s_fileno_croak (fh, 0); |
1324 | int fd = s_fileno_croak (fh, 0); |
1288 | dREQ; |
1325 | dREQ; |
1289 | |
1326 | |
1290 | req->type = EIO_READAHEAD; |
1327 | req->type = EIO_READAHEAD; |
1291 | req->sv1 = newSVsv (fh); |
1328 | req->sv1 = newSVsv (fh); |
1292 | req->int1 = fd; |
1329 | req->int1 = fd; |
… | |
… | |
1762 | int |
1799 | int |
1763 | munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef) |
1800 | munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef) |
1764 | CODE: |
1801 | CODE: |
1765 | { |
1802 | { |
1766 | STRLEN svlen; |
1803 | STRLEN svlen; |
1767 | void *addr = SvPVbyte (scalar, svlen); |
1804 | void *addr = SvPVbyte (scalar, svlen); |
1768 | size_t len = SvUV (length); |
1805 | size_t len = SvUV (length); |
1769 | |
1806 | |
1770 | if (offset < 0) |
1807 | if (offset < 0) |
1771 | offset += svlen; |
1808 | offset += svlen; |
1772 | |
1809 | |