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/cvs/IO-AIO/AIO.xs
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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.212 by root, Sun Apr 8 00:11:50 2012 UTC vs.
Revision 1.220 by root, Mon Jul 30 16:44:12 2012 UTC

… …
165fiemap (eio_req *req) 165fiemap (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 */
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, */
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.
207 */
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) */
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
249done:
213 req->result = 0; 250 req->result = 0;
214 251
215#else 252#else
216 errno = ENOSYS; 253 errno = ENOSYS;
217#endif 254#endif
… …
698} 735}
699 736
700/*****************************************************************************/ 737/*****************************************************************************/
701 738
702#if !_POSIX_MAPPED_FILES 739#if !_POSIX_MAPPED_FILES
703# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1) 740# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
704# define munmap(addr,length) (errno = ENOSYS, -1) 741# define munmap(addr,length) EIO_ENOSYS ()
705#endif 742#endif
706 743
707#if !_POSIX_MEMORY_PROTECTION 744#if !_POSIX_MEMORY_PROTECTION
708# define mprotect(addr,len,prot) (errno = ENOSYS, -1) 745# define mprotect(addr,len,prot) EIO_ENOSYS ()
709# define PROT_NONE 0 746# define PROT_NONE 0
710# define PROT_WRITE 0 747# define PROT_WRITE 0
711# define MAP_PRIVATE 0 748# define MAP_PRIVATE 0
712# define MAP_SHARED 0 749# define MAP_SHARED 0
713# define MAP_FIXED 0 750# define MAP_FIXED 0
… …
956 const_iv (FIEMAP_EXTENT_DATA_TAIL) 993 const_iv (FIEMAP_EXTENT_DATA_TAIL)
957 const_iv (FIEMAP_EXTENT_UNWRITTEN) 994 const_iv (FIEMAP_EXTENT_UNWRITTEN)
958 const_iv (FIEMAP_EXTENT_MERGED) 995 const_iv (FIEMAP_EXTENT_MERGED)
959 const_iv (FIEMAP_EXTENT_SHARED) 996 const_iv (FIEMAP_EXTENT_SHARED)
960 997
998 const_iv (SPLICE_F_MOVE)
999 const_iv (SPLICE_F_NONBLOCK)
1000 const_iv (SPLICE_F_MORE)
1001 const_iv (SPLICE_F_GIFT)
1002
1003 const_iv (SEEK_DATA)
1004 const_iv (SEEK_HOLE)
1005
1006 /* libeio constants */
961 const_eio (SEEK_SET) 1007 const_eio (SEEK_SET)
962 const_eio (SEEK_CUR) 1008 const_eio (SEEK_CUR)
963 const_eio (SEEK_END) 1009 const_eio (SEEK_END)
964 1010
965 const_eio (MCL_FUTURE) 1011 const_eio (MCL_FUTURE)
… …
974 const_eio (SYNC_FILE_RANGE_WAIT_BEFORE) 1020 const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
975 const_eio (SYNC_FILE_RANGE_WRITE) 1021 const_eio (SYNC_FILE_RANGE_WRITE)
976 const_eio (SYNC_FILE_RANGE_WAIT_AFTER) 1022 const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
977 1023
978 const_eio (FALLOC_FL_KEEP_SIZE) 1024 const_eio (FALLOC_FL_KEEP_SIZE)
1025 const_eio (FALLOC_FL_PUNCH_HOLE)
979 1026
980 const_eio (READDIR_DENTS) 1027 const_eio (READDIR_DENTS)
981 const_eio (READDIR_DIRS_FIRST) 1028 const_eio (READDIR_DIRS_FIRST)
982 const_eio (READDIR_STAT_ORDER) 1029 const_eio (READDIR_STAT_ORDER)
983 const_eio (READDIR_FOUND_UNKNOWN) 1030 const_eio (READDIR_FOUND_UNKNOWN)
… …
1206 } 1253 }
1207 else 1254 else
1208 { 1255 {
1209 /* read: check type and grow scalar as necessary */ 1256 /* read: check type and grow scalar as necessary */
1210 SvUPGRADE (data, SVt_PV); 1257 SvUPGRADE (data, SVt_PV);
1258 if (SvLEN (data) >= SvCUR (data))
1211 svptr = SvGROW (data, len + dataoffset + 1); 1259 svptr = SvGROW (data, len + dataoffset + 1);
1260 else if (SvCUR (data) < len + dataoffset)
1261 croak ("length + dataoffset outside of scalar, and cannot grow");
1212 } 1262 }
1213 1263
1214 { 1264 {
1215 dREQ; 1265 dREQ;
1216 1266
… …
1519 1569
1520void 1570void
1521aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef) 1571aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
1522 PPCODE: 1572 PPCODE:
1523{ 1573{
1524 int fd = s_fileno_croak (fh, 0); 1574 int fd = s_fileno_croak (fh, 0);
1525 dREQ; 1575 dREQ;
1526 1576
1527 req->type = EIO_CUSTOM; 1577 req->type = EIO_CUSTOM;
1528 req->sv1 = newSVsv (fh); 1578 req->sv1 = newSVsv (fh);
1529 req->int1 = fd; 1579 req->int1 = fd;
… …
1677 RETVAL = eio_sendfile_sync (ofh, ifh, offset, count); 1727 RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
1678 OUTPUT: 1728 OUTPUT:
1679 RETVAL 1729 RETVAL
1680 1730
1681void 1731void
1682mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0) 1732mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
1683 PPCODE: 1733 PPCODE:
1684 sv_unmagic (scalar, MMAP_MAGIC); 1734 sv_unmagic (scalar, MMAP_MAGIC);
1685{ 1735{
1686 int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1; 1736 int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
1687 void *addr = (void *)mmap (0, length, prot, flags, fd, offset); 1737 void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
… …
1720 ALIAS: 1770 ALIAS:
1721 mprotect = 1 1771 mprotect = 1
1722 CODE: 1772 CODE:
1723{ 1773{
1724 STRLEN svlen; 1774 STRLEN svlen;
1725 void *addr = SvPVbyte (scalar, svlen); 1775 void *addr = SvPVbyte (scalar, svlen);
1726 size_t len = SvUV (length); 1776 size_t len = SvUV (length);
1727 1777
1728 if (offset < 0) 1778 if (offset < 0)
1729 offset += svlen; 1779 offset += svlen;
1730 1780
… …
1766 addr = (void *)(((intptr_t)addr) + offset); 1816 addr = (void *)(((intptr_t)addr) + offset);
1767 eio_page_align (&addr, &len); 1817 eio_page_align (&addr, &len);
1768#if _POSIX_MEMLOCK_RANGE 1818#if _POSIX_MEMLOCK_RANGE
1769 RETVAL = munlock (addr, len); 1819 RETVAL = munlock (addr, len);
1770#else 1820#else
1771 RETVAL = ((errno = ENOSYS), -1); 1821 RETVAL = EIO_ENOSYS ();
1772#endif 1822#endif
1773} 1823}
1774 OUTPUT: 1824 OUTPUT:
1775 RETVAL 1825 RETVAL
1776 1826
… …
1778munlockall () 1828munlockall ()
1779 CODE: 1829 CODE:
1780#if _POSIX_MEMLOCK 1830#if _POSIX_MEMLOCK
1781 munlockall (); 1831 munlockall ();
1782#else 1832#else
1783 RETVAL = -1; 1833 RETVAL = EIO_ENOSYS ();
1784 errno = ENOSYS;
1785#endif 1834#endif
1786 OUTPUT: 1835 OUTPUT:
1836 RETVAL
1837
1838int
1839splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
1840 CODE:
1841{
1842#if HAVE_LINUX_SPLICE
1843 loff_t off_in_, off_out_;
1844 RETVAL = splice (
1845 rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
1846 wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
1847 length, flags
1848 );
1849#else
1850 RETVAL = EIO_ENOSYS ();
1851#endif
1852}
1853 OUTPUT:
1854 RETVAL
1855
1856int
1857tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
1858 CODE:
1859#if HAVE_LINUX_SPLICE
1860 RETVAL = tee (rfh, wfh, length, flags);
1861#else
1862 RETVAL = EIO_ENOSYS ();
1863#endif
1864 OUTPUT:
1787 RETVAL 1865 RETVAL
1788 1866
1789void _on_next_submit (SV *cb) 1867void _on_next_submit (SV *cb)
1790 CODE: 1868 CODE:
1791 SvREFCNT_dec (on_next_submit); 1869 SvREFCNT_dec (on_next_submit);

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