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/cvs/IO-AIO/AIO.xs
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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.210 by root, Fri Apr 6 11:39:25 2012 UTC vs.
Revision 1.212 by root, Sun Apr 8 00:11:50 2012 UTC

… …
22#endif 22#endif
23 23
24#if __linux__ 24#if __linux__
25# include <linux/fs.h> 25# include <linux/fs.h>
26# ifdef FS_IOC_FIEMAP 26# ifdef FS_IOC_FIEMAP
27# include <linux/types.h>
27# include <linux/fiemap.h> 28# include <linux/fiemap.h>
28# define HAVE_FIEMAP 1 29# define HAVE_FIEMAP 1
29# endif 30# endif
30#endif 31#endif
31 32
… …
164fiemap (eio_req *req) 165fiemap (eio_req *req)
165{ 166{
166 req->result = -1; 167 req->result = -1;
167 168
168#if HAVE_FIEMAP 169#if HAVE_FIEMAP
170 int count = req->int3;
171
172 /* heuristic: first try with 64 extents if we don't know how many, */
173 /* as most files have (hopefully) fewer than this many extents */
174 /* in fact, most should have <= 2, so maybe the 72 below is probably overkill */
175 if (count < 0)
176 count = 72; /* for what it's worth, 72 extents fit nicely into 4kb */
177
169 for (;;) 178 for (;;)
170 { 179 {
171 int count = req->int3;
172
173 if (count < 0)
174 {
175 struct fiemap fiemap;
176
177 fiemap.fm_start = req->offs;
178 fiemap.fm_length = req->size;
179 fiemap.fm_flags = req->int2;
180 fiemap.fm_extent_count = 0;
181
182 if (ioctl (req->int1, FS_IOC_FIEMAP, &fiemap))
183 return;
184
185 count = fiemap.fm_mapped_extents;
186 }
187
188 struct fiemap *fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count); 180 struct fiemap *fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
189 errno = ENOMEM; 181 errno = ENOMEM;
190 if (!fiemap) 182 if (!fiemap)
191 return; 183 return;
192 184
… …
204 if (req->int3 >= 0) 196 if (req->int3 >= 0)
205 break; /* when not autosizing we are done */ 197 break; /* when not autosizing we are done */
206 198
207 if (fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST) 199 if (fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST)
208 break; /* autosizing successful, we are done */ 200 break; /* autosizing successful, we are done */
201
202 fiemap->fm_flags = req->int2;
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;
209 209
210 free (fiemap); 210 free (fiemap);
211 } 211 }
212 212
213 req->result = 0; 213 req->result = 0;
… …
545 break; 545 break;
546 546
547 case EIO_CUSTOM: 547 case EIO_CUSTOM:
548 if (req->feed == fiemap) 548 if (req->feed == fiemap)
549 { 549 {
550#if HAVE_FIEMAP
550 if (!req->result) 551 if (!req->result)
551 { 552 {
552 struct fiemap *fiemap = (struct fiemap *)req->ptr1; 553 struct fiemap *fiemap = (struct fiemap *)req->ptr1;
553 554
554 if (fiemap->fm_extent_count) 555 if (fiemap->fm_extent_count)
… …
575 { 576 {
576 SvIV_set (sv_result, fiemap->fm_mapped_extents); 577 SvIV_set (sv_result, fiemap->fm_mapped_extents);
577 PUSHs (sv_result); 578 PUSHs (sv_result);
578 } 579 }
579 } 580 }
581#endif
580 } 582 }
581 else 583 else
582 PUSHs (sv_result); 584 PUSHs (sv_result);
583 break; 585 break;
584 586
… …
1164 1166
1165void 1167void
1166aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef) 1168aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
1167 PPCODE: 1169 PPCODE:
1168{ 1170{
1169 STRLEN svlen;
1170 int fd = s_fileno_croak (fh, 0); 1171 int fd = s_fileno_croak (fh, 0);
1171 dREQ; 1172 dREQ;
1172 1173
1173 req->type = EIO_SEEK; 1174 req->type = EIO_SEEK;
1174 req->sv1 = newSVsv (fh); 1175 req->sv1 = newSVsv (fh);
… …
1526 req->type = EIO_CUSTOM; 1527 req->type = EIO_CUSTOM;
1527 req->sv1 = newSVsv (fh); 1528 req->sv1 = newSVsv (fh);
1528 req->int1 = fd; 1529 req->int1 = fd;
1529 1530
1530 req->feed = fiemap; 1531 req->feed = fiemap;
1532#if HAVE_FIEMAP
1531 /* keep our fingers crossed that the next two types are 64 bit */ 1533 /* keep our fingers crossed that the next two types are 64 bit */
1532 req->offs = start; 1534 req->offs = start;
1533 req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL; 1535 req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
1534 req->int2 = flags; 1536 req->int2 = flags;
1535 req->int3 = SvOK (count) ? SvIV (count) : -1; 1537 req->int3 = SvOK (count) ? SvIV (count) : -1;
1538#endif
1536 1539
1537 REQ_SEND; 1540 REQ_SEND;
1538} 1541}
1539 1542
1540void 1543void

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