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Diffstat (limited to 'fs/xfs/xfs_iget.c')
-rw-r--r--fs/xfs/xfs_iget.c108
1 files changed, 5 insertions, 103 deletions
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index 8f8b91be2c99..b1ecc6f97ade 100644
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -25,14 +25,10 @@
25#include "xfs_trans.h" 25#include "xfs_trans.h"
26#include "xfs_sb.h" 26#include "xfs_sb.h"
27#include "xfs_ag.h" 27#include "xfs_ag.h"
28#include "xfs_dir2.h"
29#include "xfs_dmapi.h"
30#include "xfs_mount.h" 28#include "xfs_mount.h"
31#include "xfs_bmap_btree.h" 29#include "xfs_bmap_btree.h"
32#include "xfs_alloc_btree.h" 30#include "xfs_alloc_btree.h"
33#include "xfs_ialloc_btree.h" 31#include "xfs_ialloc_btree.h"
34#include "xfs_dir2_sf.h"
35#include "xfs_attr_sf.h"
36#include "xfs_dinode.h" 32#include "xfs_dinode.h"
37#include "xfs_inode.h" 33#include "xfs_inode.h"
38#include "xfs_btree.h" 34#include "xfs_btree.h"
@@ -95,7 +91,7 @@ xfs_inode_alloc(
95 return ip; 91 return ip;
96} 92}
97 93
98STATIC void 94void
99xfs_inode_free( 95xfs_inode_free(
100 struct xfs_inode *ip) 96 struct xfs_inode *ip)
101{ 97{
@@ -212,7 +208,7 @@ xfs_iget_cache_hit(
212 ip->i_flags &= ~XFS_INEW; 208 ip->i_flags &= ~XFS_INEW;
213 ip->i_flags |= XFS_IRECLAIMABLE; 209 ip->i_flags |= XFS_IRECLAIMABLE;
214 __xfs_inode_set_reclaim_tag(pag, ip); 210 __xfs_inode_set_reclaim_tag(pag, ip);
215 trace_xfs_iget_reclaim(ip); 211 trace_xfs_iget_reclaim_fail(ip);
216 goto out_error; 212 goto out_error;
217 } 213 }
218 214
@@ -227,6 +223,7 @@ xfs_iget_cache_hit(
227 } else { 223 } else {
228 /* If the VFS inode is being torn down, pause and try again. */ 224 /* If the VFS inode is being torn down, pause and try again. */
229 if (!igrab(inode)) { 225 if (!igrab(inode)) {
226 trace_xfs_iget_skip(ip);
230 error = EAGAIN; 227 error = EAGAIN;
231 goto out_error; 228 goto out_error;
232 } 229 }
@@ -234,6 +231,7 @@ xfs_iget_cache_hit(
234 /* We've got a live one. */ 231 /* We've got a live one. */
235 spin_unlock(&ip->i_flags_lock); 232 spin_unlock(&ip->i_flags_lock);
236 read_unlock(&pag->pag_ici_lock); 233 read_unlock(&pag->pag_ici_lock);
234 trace_xfs_iget_hit(ip);
237 } 235 }
238 236
239 if (lock_flags != 0) 237 if (lock_flags != 0)
@@ -242,7 +240,6 @@ xfs_iget_cache_hit(
242 xfs_iflags_clear(ip, XFS_ISTALE); 240 xfs_iflags_clear(ip, XFS_ISTALE);
243 XFS_STATS_INC(xs_ig_found); 241 XFS_STATS_INC(xs_ig_found);
244 242
245 trace_xfs_iget_found(ip);
246 return 0; 243 return 0;
247 244
248out_error: 245out_error:
@@ -264,7 +261,6 @@ xfs_iget_cache_miss(
264{ 261{
265 struct xfs_inode *ip; 262 struct xfs_inode *ip;
266 int error; 263 int error;
267 unsigned long first_index, mask;
268 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ino); 264 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ino);
269 265
270 ip = xfs_inode_alloc(mp, ino); 266 ip = xfs_inode_alloc(mp, ino);
@@ -275,7 +271,7 @@ xfs_iget_cache_miss(
275 if (error) 271 if (error)
276 goto out_destroy; 272 goto out_destroy;
277 273
278 xfs_itrace_entry(ip); 274 trace_xfs_iget_miss(ip);
279 275
280 if ((ip->i_d.di_mode == 0) && !(flags & XFS_IGET_CREATE)) { 276 if ((ip->i_d.di_mode == 0) && !(flags & XFS_IGET_CREATE)) {
281 error = ENOENT; 277 error = ENOENT;
@@ -301,8 +297,6 @@ xfs_iget_cache_miss(
301 BUG(); 297 BUG();
302 } 298 }
303 299
304 mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1);
305 first_index = agino & mask;
306 write_lock(&pag->pag_ici_lock); 300 write_lock(&pag->pag_ici_lock);
307 301
308 /* insert the new inode */ 302 /* insert the new inode */
@@ -321,7 +315,6 @@ xfs_iget_cache_miss(
321 write_unlock(&pag->pag_ici_lock); 315 write_unlock(&pag->pag_ici_lock);
322 radix_tree_preload_end(); 316 radix_tree_preload_end();
323 317
324 trace_xfs_iget_alloc(ip);
325 *ipp = ip; 318 *ipp = ip;
326 return 0; 319 return 0;
327 320
@@ -422,97 +415,6 @@ out_error_or_again:
422} 415}
423 416
424/* 417/*
425 * Decrement reference count of an inode structure and unlock it.
426 *
427 * ip -- the inode being released
428 * lock_flags -- this parameter indicates the inode's locks to be
429 * to be released. See the comment on xfs_iunlock() for a list
430 * of valid values.
431 */
432void
433xfs_iput(xfs_inode_t *ip,
434 uint lock_flags)
435{
436 xfs_itrace_entry(ip);
437 xfs_iunlock(ip, lock_flags);
438 IRELE(ip);
439}
440
441/*
442 * Special iput for brand-new inodes that are still locked
443 */
444void
445xfs_iput_new(
446 xfs_inode_t *ip,
447 uint lock_flags)
448{
449 struct inode *inode = VFS_I(ip);
450
451 xfs_itrace_entry(ip);
452
453 if ((ip->i_d.di_mode == 0)) {
454 ASSERT(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
455 make_bad_inode(inode);
456 }
457 if (inode->i_state & I_NEW)
458 unlock_new_inode(inode);
459 if (lock_flags)
460 xfs_iunlock(ip, lock_flags);
461 IRELE(ip);
462}
463
464/*
465 * This is called free all the memory associated with an inode.
466 * It must free the inode itself and any buffers allocated for
467 * if_extents/if_data and if_broot. It must also free the lock
468 * associated with the inode.
469 *
470 * Note: because we don't initialise everything on reallocation out
471 * of the zone, we must ensure we nullify everything correctly before
472 * freeing the structure.
473 */
474void
475xfs_ireclaim(
476 struct xfs_inode *ip)
477{
478 struct xfs_mount *mp = ip->i_mount;
479 struct xfs_perag *pag;
480 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
481
482 XFS_STATS_INC(xs_ig_reclaims);
483
484 /*
485 * Remove the inode from the per-AG radix tree.
486 *
487 * Because radix_tree_delete won't complain even if the item was never
488 * added to the tree assert that it's been there before to catch
489 * problems with the inode life time early on.
490 */
491 pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
492 write_lock(&pag->pag_ici_lock);
493 if (!radix_tree_delete(&pag->pag_ici_root, agino))
494 ASSERT(0);
495 write_unlock(&pag->pag_ici_lock);
496 xfs_perag_put(pag);
497
498 /*
499 * Here we do an (almost) spurious inode lock in order to coordinate
500 * with inode cache radix tree lookups. This is because the lookup
501 * can reference the inodes in the cache without taking references.
502 *
503 * We make that OK here by ensuring that we wait until the inode is
504 * unlocked after the lookup before we go ahead and free it. We get
505 * both the ilock and the iolock because the code may need to drop the
506 * ilock one but will still hold the iolock.
507 */
508 xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
509 xfs_qm_dqdetach(ip);
510 xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
511
512 xfs_inode_free(ip);
513}
514
515/*
516 * This is a wrapper routine around the xfs_ilock() routine 418 * This is a wrapper routine around the xfs_ilock() routine
517 * used to centralize some grungy code. It is used in places 419 * used to centralize some grungy code. It is used in places
518 * that wish to lock the inode solely for reading the extents. 420 * that wish to lock the inode solely for reading the extents.