Linux Audio

Check our new training course

Loading...
v4.17
 
  1/*
  2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
  3 * All Rights Reserved.
  4 *
  5 * This program is free software; you can redistribute it and/or
  6 * modify it under the terms of the GNU General Public License as
  7 * published by the Free Software Foundation.
  8 *
  9 * This program is distributed in the hope that it would be useful,
 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12 * GNU General Public License for more details.
 13 *
 14 * You should have received a copy of the GNU General Public License
 15 * along with this program; if not, write the Free Software Foundation,
 16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 17 */
 18#include "xfs.h"
 19#include "xfs_fs.h"
 
 20#include "xfs_format.h"
 21#include "xfs_log_format.h"
 22#include "xfs_trans_resv.h"
 23#include "xfs_mount.h"
 24#include "xfs_inode.h"
 25#include "xfs_trans.h"
 26#include "xfs_inode_item.h"
 27#include "xfs_error.h"
 28#include "xfs_trace.h"
 29#include "xfs_trans_priv.h"
 30#include "xfs_buf_item.h"
 31#include "xfs_log.h"
 
 
 
 32
 33#include <linux/iversion.h>
 34
 35kmem_zone_t	*xfs_ili_zone;		/* inode log item zone */
 36
 37static inline struct xfs_inode_log_item *INODE_ITEM(struct xfs_log_item *lip)
 38{
 39	return container_of(lip, struct xfs_inode_log_item, ili_item);
 40}
 41
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 42STATIC void
 43xfs_inode_item_data_fork_size(
 44	struct xfs_inode_log_item *iip,
 45	int			*nvecs,
 46	int			*nbytes)
 47{
 48	struct xfs_inode	*ip = iip->ili_inode;
 49
 50	switch (ip->i_d.di_format) {
 51	case XFS_DINODE_FMT_EXTENTS:
 52		if ((iip->ili_fields & XFS_ILOG_DEXT) &&
 53		    ip->i_d.di_nextents > 0 &&
 54		    ip->i_df.if_bytes > 0) {
 55			/* worst case, doesn't subtract delalloc extents */
 56			*nbytes += XFS_IFORK_DSIZE(ip);
 57			*nvecs += 1;
 58		}
 59		break;
 60	case XFS_DINODE_FMT_BTREE:
 61		if ((iip->ili_fields & XFS_ILOG_DBROOT) &&
 62		    ip->i_df.if_broot_bytes > 0) {
 63			*nbytes += ip->i_df.if_broot_bytes;
 64			*nvecs += 1;
 65		}
 66		break;
 67	case XFS_DINODE_FMT_LOCAL:
 68		if ((iip->ili_fields & XFS_ILOG_DDATA) &&
 69		    ip->i_df.if_bytes > 0) {
 70			*nbytes += roundup(ip->i_df.if_bytes, 4);
 71			*nvecs += 1;
 72		}
 73		break;
 74
 75	case XFS_DINODE_FMT_DEV:
 76		break;
 77	default:
 78		ASSERT(0);
 79		break;
 80	}
 81}
 82
 83STATIC void
 84xfs_inode_item_attr_fork_size(
 85	struct xfs_inode_log_item *iip,
 86	int			*nvecs,
 87	int			*nbytes)
 88{
 89	struct xfs_inode	*ip = iip->ili_inode;
 90
 91	switch (ip->i_d.di_aformat) {
 92	case XFS_DINODE_FMT_EXTENTS:
 93		if ((iip->ili_fields & XFS_ILOG_AEXT) &&
 94		    ip->i_d.di_anextents > 0 &&
 95		    ip->i_afp->if_bytes > 0) {
 96			/* worst case, doesn't subtract unused space */
 97			*nbytes += XFS_IFORK_ASIZE(ip);
 98			*nvecs += 1;
 99		}
100		break;
101	case XFS_DINODE_FMT_BTREE:
102		if ((iip->ili_fields & XFS_ILOG_ABROOT) &&
103		    ip->i_afp->if_broot_bytes > 0) {
104			*nbytes += ip->i_afp->if_broot_bytes;
105			*nvecs += 1;
106		}
107		break;
108	case XFS_DINODE_FMT_LOCAL:
109		if ((iip->ili_fields & XFS_ILOG_ADATA) &&
110		    ip->i_afp->if_bytes > 0) {
111			*nbytes += roundup(ip->i_afp->if_bytes, 4);
112			*nvecs += 1;
113		}
114		break;
115	default:
116		ASSERT(0);
117		break;
118	}
119}
120
121/*
122 * This returns the number of iovecs needed to log the given inode item.
123 *
124 * We need one iovec for the inode log format structure, one for the
125 * inode core, and possibly one for the inode data/extents/b-tree root
126 * and one for the inode attribute data/extents/b-tree root.
127 */
128STATIC void
129xfs_inode_item_size(
130	struct xfs_log_item	*lip,
131	int			*nvecs,
132	int			*nbytes)
133{
134	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
135	struct xfs_inode	*ip = iip->ili_inode;
136
137	*nvecs += 2;
138	*nbytes += sizeof(struct xfs_inode_log_format) +
139		   xfs_log_dinode_size(ip->i_d.di_version);
140
141	xfs_inode_item_data_fork_size(iip, nvecs, nbytes);
142	if (XFS_IFORK_Q(ip))
143		xfs_inode_item_attr_fork_size(iip, nvecs, nbytes);
144}
145
146STATIC void
147xfs_inode_item_format_data_fork(
148	struct xfs_inode_log_item *iip,
149	struct xfs_inode_log_format *ilf,
150	struct xfs_log_vec	*lv,
151	struct xfs_log_iovec	**vecp)
152{
153	struct xfs_inode	*ip = iip->ili_inode;
154	size_t			data_bytes;
155
156	switch (ip->i_d.di_format) {
157	case XFS_DINODE_FMT_EXTENTS:
158		iip->ili_fields &=
159			~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | XFS_ILOG_DEV);
160
161		if ((iip->ili_fields & XFS_ILOG_DEXT) &&
162		    ip->i_d.di_nextents > 0 &&
163		    ip->i_df.if_bytes > 0) {
164			struct xfs_bmbt_rec *p;
165
166			ASSERT(xfs_iext_count(&ip->i_df) > 0);
167
168			p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IEXT);
169			data_bytes = xfs_iextents_copy(ip, p, XFS_DATA_FORK);
170			xlog_finish_iovec(lv, *vecp, data_bytes);
171
172			ASSERT(data_bytes <= ip->i_df.if_bytes);
173
174			ilf->ilf_dsize = data_bytes;
175			ilf->ilf_size++;
176		} else {
177			iip->ili_fields &= ~XFS_ILOG_DEXT;
178		}
179		break;
180	case XFS_DINODE_FMT_BTREE:
181		iip->ili_fields &=
182			~(XFS_ILOG_DDATA | XFS_ILOG_DEXT | XFS_ILOG_DEV);
183
184		if ((iip->ili_fields & XFS_ILOG_DBROOT) &&
185		    ip->i_df.if_broot_bytes > 0) {
186			ASSERT(ip->i_df.if_broot != NULL);
187			xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IBROOT,
188					ip->i_df.if_broot,
189					ip->i_df.if_broot_bytes);
190			ilf->ilf_dsize = ip->i_df.if_broot_bytes;
191			ilf->ilf_size++;
192		} else {
193			ASSERT(!(iip->ili_fields &
194				 XFS_ILOG_DBROOT));
195			iip->ili_fields &= ~XFS_ILOG_DBROOT;
196		}
197		break;
198	case XFS_DINODE_FMT_LOCAL:
199		iip->ili_fields &=
200			~(XFS_ILOG_DEXT | XFS_ILOG_DBROOT | XFS_ILOG_DEV);
201		if ((iip->ili_fields & XFS_ILOG_DDATA) &&
202		    ip->i_df.if_bytes > 0) {
203			/*
204			 * Round i_bytes up to a word boundary.
205			 * The underlying memory is guaranteed to
206			 * to be there by xfs_idata_realloc().
207			 */
208			data_bytes = roundup(ip->i_df.if_bytes, 4);
209			ASSERT(ip->i_df.if_real_bytes == 0 ||
210			       ip->i_df.if_real_bytes >= data_bytes);
211			ASSERT(ip->i_df.if_u1.if_data != NULL);
212			ASSERT(ip->i_d.di_size > 0);
213			xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_ILOCAL,
214					ip->i_df.if_u1.if_data, data_bytes);
215			ilf->ilf_dsize = (unsigned)data_bytes;
216			ilf->ilf_size++;
217		} else {
218			iip->ili_fields &= ~XFS_ILOG_DDATA;
219		}
220		break;
221	case XFS_DINODE_FMT_DEV:
222		iip->ili_fields &=
223			~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | XFS_ILOG_DEXT);
224		if (iip->ili_fields & XFS_ILOG_DEV)
225			ilf->ilf_u.ilfu_rdev = sysv_encode_dev(VFS_I(ip)->i_rdev);
226		break;
227	default:
228		ASSERT(0);
229		break;
230	}
231}
232
233STATIC void
234xfs_inode_item_format_attr_fork(
235	struct xfs_inode_log_item *iip,
236	struct xfs_inode_log_format *ilf,
237	struct xfs_log_vec	*lv,
238	struct xfs_log_iovec	**vecp)
239{
240	struct xfs_inode	*ip = iip->ili_inode;
241	size_t			data_bytes;
242
243	switch (ip->i_d.di_aformat) {
244	case XFS_DINODE_FMT_EXTENTS:
245		iip->ili_fields &=
246			~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT);
247
248		if ((iip->ili_fields & XFS_ILOG_AEXT) &&
249		    ip->i_d.di_anextents > 0 &&
250		    ip->i_afp->if_bytes > 0) {
251			struct xfs_bmbt_rec *p;
252
253			ASSERT(xfs_iext_count(ip->i_afp) ==
254				ip->i_d.di_anextents);
255
256			p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_EXT);
257			data_bytes = xfs_iextents_copy(ip, p, XFS_ATTR_FORK);
258			xlog_finish_iovec(lv, *vecp, data_bytes);
259
260			ilf->ilf_asize = data_bytes;
261			ilf->ilf_size++;
262		} else {
263			iip->ili_fields &= ~XFS_ILOG_AEXT;
264		}
265		break;
266	case XFS_DINODE_FMT_BTREE:
267		iip->ili_fields &=
268			~(XFS_ILOG_ADATA | XFS_ILOG_AEXT);
269
270		if ((iip->ili_fields & XFS_ILOG_ABROOT) &&
271		    ip->i_afp->if_broot_bytes > 0) {
272			ASSERT(ip->i_afp->if_broot != NULL);
273
274			xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_BROOT,
275					ip->i_afp->if_broot,
276					ip->i_afp->if_broot_bytes);
277			ilf->ilf_asize = ip->i_afp->if_broot_bytes;
278			ilf->ilf_size++;
279		} else {
280			iip->ili_fields &= ~XFS_ILOG_ABROOT;
281		}
282		break;
283	case XFS_DINODE_FMT_LOCAL:
284		iip->ili_fields &=
285			~(XFS_ILOG_AEXT | XFS_ILOG_ABROOT);
286
287		if ((iip->ili_fields & XFS_ILOG_ADATA) &&
288		    ip->i_afp->if_bytes > 0) {
289			/*
290			 * Round i_bytes up to a word boundary.
291			 * The underlying memory is guaranteed to
292			 * to be there by xfs_idata_realloc().
293			 */
294			data_bytes = roundup(ip->i_afp->if_bytes, 4);
295			ASSERT(ip->i_afp->if_real_bytes == 0 ||
296			       ip->i_afp->if_real_bytes >= data_bytes);
297			ASSERT(ip->i_afp->if_u1.if_data != NULL);
298			xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_LOCAL,
299					ip->i_afp->if_u1.if_data,
300					data_bytes);
301			ilf->ilf_asize = (unsigned)data_bytes;
302			ilf->ilf_size++;
303		} else {
304			iip->ili_fields &= ~XFS_ILOG_ADATA;
305		}
306		break;
307	default:
308		ASSERT(0);
309		break;
310	}
311}
312
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
313static void
314xfs_inode_to_log_dinode(
315	struct xfs_inode	*ip,
316	struct xfs_log_dinode	*to,
317	xfs_lsn_t		lsn)
318{
319	struct xfs_icdinode	*from = &ip->i_d;
320	struct inode		*inode = VFS_I(ip);
321
322	to->di_magic = XFS_DINODE_MAGIC;
323
324	to->di_version = from->di_version;
325	to->di_format = from->di_format;
326	to->di_uid = from->di_uid;
327	to->di_gid = from->di_gid;
328	to->di_projid_lo = from->di_projid_lo;
329	to->di_projid_hi = from->di_projid_hi;
330
331	memset(to->di_pad, 0, sizeof(to->di_pad));
332	memset(to->di_pad3, 0, sizeof(to->di_pad3));
333	to->di_atime.t_sec = inode->i_atime.tv_sec;
334	to->di_atime.t_nsec = inode->i_atime.tv_nsec;
335	to->di_mtime.t_sec = inode->i_mtime.tv_sec;
336	to->di_mtime.t_nsec = inode->i_mtime.tv_nsec;
337	to->di_ctime.t_sec = inode->i_ctime.tv_sec;
338	to->di_ctime.t_nsec = inode->i_ctime.tv_nsec;
339	to->di_nlink = inode->i_nlink;
340	to->di_gen = inode->i_generation;
341	to->di_mode = inode->i_mode;
342
343	to->di_size = from->di_size;
344	to->di_nblocks = from->di_nblocks;
345	to->di_extsize = from->di_extsize;
346	to->di_nextents = from->di_nextents;
347	to->di_anextents = from->di_anextents;
348	to->di_forkoff = from->di_forkoff;
349	to->di_aformat = from->di_aformat;
350	to->di_dmevmask = from->di_dmevmask;
351	to->di_dmstate = from->di_dmstate;
352	to->di_flags = from->di_flags;
353
354	/* log a dummy value to ensure log structure is fully initialised */
355	to->di_next_unlinked = NULLAGINO;
356
357	if (from->di_version == 3) {
 
358		to->di_changecount = inode_peek_iversion(inode);
359		to->di_crtime.t_sec = from->di_crtime.t_sec;
360		to->di_crtime.t_nsec = from->di_crtime.t_nsec;
361		to->di_flags2 = from->di_flags2;
362		to->di_cowextsize = from->di_cowextsize;
363		to->di_ino = ip->i_ino;
364		to->di_lsn = lsn;
365		memset(to->di_pad2, 0, sizeof(to->di_pad2));
366		uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid);
367		to->di_flushiter = 0;
 
 
 
 
 
 
 
 
368	} else {
369		to->di_flushiter = from->di_flushiter;
 
 
 
370	}
 
 
371}
372
373/*
374 * Format the inode core. Current timestamp data is only in the VFS inode
375 * fields, so we need to grab them from there. Hence rather than just copying
376 * the XFS inode core structure, format the fields directly into the iovec.
377 */
378static void
379xfs_inode_item_format_core(
380	struct xfs_inode	*ip,
381	struct xfs_log_vec	*lv,
382	struct xfs_log_iovec	**vecp)
383{
384	struct xfs_log_dinode	*dic;
385
386	dic = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_ICORE);
387	xfs_inode_to_log_dinode(ip, dic, ip->i_itemp->ili_item.li_lsn);
388	xlog_finish_iovec(lv, *vecp, xfs_log_dinode_size(ip->i_d.di_version));
389}
390
391/*
392 * This is called to fill in the vector of log iovecs for the given inode
393 * log item.  It fills the first item with an inode log format structure,
394 * the second with the on-disk inode structure, and a possible third and/or
395 * fourth with the inode data/extents/b-tree root and inode attributes
396 * data/extents/b-tree root.
397 *
398 * Note: Always use the 64 bit inode log format structure so we don't
399 * leave an uninitialised hole in the format item on 64 bit systems. Log
400 * recovery on 32 bit systems handles this just fine, so there's no reason
401 * for not using an initialising the properly padded structure all the time.
402 */
403STATIC void
404xfs_inode_item_format(
405	struct xfs_log_item	*lip,
406	struct xfs_log_vec	*lv)
407{
408	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
409	struct xfs_inode	*ip = iip->ili_inode;
410	struct xfs_log_iovec	*vecp = NULL;
411	struct xfs_inode_log_format *ilf;
412
413	ASSERT(ip->i_d.di_version > 1);
414
415	ilf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_IFORMAT);
416	ilf->ilf_type = XFS_LI_INODE;
417	ilf->ilf_ino = ip->i_ino;
418	ilf->ilf_blkno = ip->i_imap.im_blkno;
419	ilf->ilf_len = ip->i_imap.im_len;
420	ilf->ilf_boffset = ip->i_imap.im_boffset;
421	ilf->ilf_fields = XFS_ILOG_CORE;
422	ilf->ilf_size = 2; /* format + core */
423
424	/*
425	 * make sure we don't leak uninitialised data into the log in the case
426	 * when we don't log every field in the inode.
427	 */
428	ilf->ilf_dsize = 0;
429	ilf->ilf_asize = 0;
430	ilf->ilf_pad = 0;
431	memset(&ilf->ilf_u, 0, sizeof(ilf->ilf_u));
432
433	xlog_finish_iovec(lv, vecp, sizeof(*ilf));
434
435	xfs_inode_item_format_core(ip, lv, &vecp);
436	xfs_inode_item_format_data_fork(iip, ilf, lv, &vecp);
437	if (XFS_IFORK_Q(ip)) {
438		xfs_inode_item_format_attr_fork(iip, ilf, lv, &vecp);
439	} else {
440		iip->ili_fields &=
441			~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT);
442	}
443
444	/* update the format with the exact fields we actually logged */
445	ilf->ilf_fields |= (iip->ili_fields & ~XFS_ILOG_TIMESTAMP);
446}
447
448/*
449 * This is called to pin the inode associated with the inode log
450 * item in memory so it cannot be written out.
451 */
452STATIC void
453xfs_inode_item_pin(
454	struct xfs_log_item	*lip)
455{
456	struct xfs_inode	*ip = INODE_ITEM(lip)->ili_inode;
457
458	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 
459
460	trace_xfs_inode_pin(ip, _RET_IP_);
461	atomic_inc(&ip->i_pincount);
462}
463
464
465/*
466 * This is called to unpin the inode associated with the inode log
467 * item which was previously pinned with a call to xfs_inode_item_pin().
468 *
469 * Also wake up anyone in xfs_iunpin_wait() if the count goes to 0.
 
 
 
 
 
 
470 */
471STATIC void
472xfs_inode_item_unpin(
473	struct xfs_log_item	*lip,
474	int			remove)
475{
476	struct xfs_inode	*ip = INODE_ITEM(lip)->ili_inode;
477
478	trace_xfs_inode_unpin(ip, _RET_IP_);
 
479	ASSERT(atomic_read(&ip->i_pincount) > 0);
480	if (atomic_dec_and_test(&ip->i_pincount))
481		wake_up_bit(&ip->i_flags, __XFS_IPINNED_BIT);
482}
483
484/*
485 * Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
486 * have been failed during writeback
487 *
488 * This informs the AIL that the inode is already flush locked on the next push,
489 * and acquires a hold on the buffer to ensure that it isn't reclaimed before
490 * dirty data makes it to disk.
491 */
492STATIC void
493xfs_inode_item_error(
494	struct xfs_log_item	*lip,
495	struct xfs_buf		*bp)
496{
497	ASSERT(xfs_isiflocked(INODE_ITEM(lip)->ili_inode));
498	xfs_set_li_failed(lip, bp);
499}
500
501STATIC uint
502xfs_inode_item_push(
503	struct xfs_log_item	*lip,
504	struct list_head	*buffer_list)
505		__releases(&lip->li_ailp->ail_lock)
506		__acquires(&lip->li_ailp->ail_lock)
507{
508	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
509	struct xfs_inode	*ip = iip->ili_inode;
510	struct xfs_buf		*bp = lip->li_buf;
511	uint			rval = XFS_ITEM_SUCCESS;
512	int			error;
513
514	if (xfs_ipincount(ip) > 0)
 
 
 
 
 
 
515		return XFS_ITEM_PINNED;
 
516
517	/*
518	 * The buffer containing this item failed to be written back
519	 * previously. Resubmit the buffer for IO.
520	 */
521	if (lip->li_flags & XFS_LI_FAILED) {
522		if (!xfs_buf_trylock(bp))
523			return XFS_ITEM_LOCKED;
524
525		if (!xfs_buf_resubmit_failed_buffers(bp, buffer_list))
526			rval = XFS_ITEM_FLUSHING;
527
528		xfs_buf_unlock(bp);
529		return rval;
530	}
531
532	if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
533		return XFS_ITEM_LOCKED;
534
535	/*
536	 * Re-check the pincount now that we stabilized the value by
537	 * taking the ilock.
538	 */
539	if (xfs_ipincount(ip) > 0) {
540		rval = XFS_ITEM_PINNED;
541		goto out_unlock;
542	}
543
544	/*
545	 * Stale inode items should force out the iclog.
546	 */
547	if (ip->i_flags & XFS_ISTALE) {
548		rval = XFS_ITEM_PINNED;
549		goto out_unlock;
550	}
551
552	/*
553	 * Someone else is already flushing the inode.  Nothing we can do
554	 * here but wait for the flush to finish and remove the item from
555	 * the AIL.
 
556	 */
557	if (!xfs_iflock_nowait(ip)) {
558		rval = XFS_ITEM_FLUSHING;
559		goto out_unlock;
560	}
561
562	ASSERT(iip->ili_fields != 0 || XFS_FORCED_SHUTDOWN(ip->i_mount));
563	ASSERT(iip->ili_logged == 0 || XFS_FORCED_SHUTDOWN(ip->i_mount));
564
565	spin_unlock(&lip->li_ailp->ail_lock);
566
567	error = xfs_iflush(ip, &bp);
568	if (!error) {
569		if (!xfs_buf_delwri_queue(bp, buffer_list))
570			rval = XFS_ITEM_FLUSHING;
571		xfs_buf_relse(bp);
 
 
 
 
 
 
 
 
572	}
573
574	spin_lock(&lip->li_ailp->ail_lock);
575out_unlock:
576	xfs_iunlock(ip, XFS_ILOCK_SHARED);
577	return rval;
578}
579
580/*
581 * Unlock the inode associated with the inode log item.
582 */
583STATIC void
584xfs_inode_item_unlock(
585	struct xfs_log_item	*lip)
586{
587	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
588	struct xfs_inode	*ip = iip->ili_inode;
589	unsigned short		lock_flags;
590
591	ASSERT(ip->i_itemp != NULL);
592	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
593
594	lock_flags = iip->ili_lock_flags;
595	iip->ili_lock_flags = 0;
596	if (lock_flags)
597		xfs_iunlock(ip, lock_flags);
598}
599
600/*
601 * This is called to find out where the oldest active copy of the inode log
602 * item in the on disk log resides now that the last log write of it completed
603 * at the given lsn.  Since we always re-log all dirty data in an inode, the
604 * latest copy in the on disk log is the only one that matters.  Therefore,
605 * simply return the given lsn.
606 *
607 * If the inode has been marked stale because the cluster is being freed, we
608 * don't want to (re-)insert this inode into the AIL. There is a race condition
609 * where the cluster buffer may be unpinned before the inode is inserted into
610 * the AIL during transaction committed processing. If the buffer is unpinned
611 * before the inode item has been committed and inserted, then it is possible
612 * for the buffer to be written and IO completes before the inode is inserted
613 * into the AIL. In that case, we'd be inserting a clean, stale inode into the
614 * AIL which will never get removed. It will, however, get reclaimed which
615 * triggers an assert in xfs_inode_free() complaining about freein an inode
616 * still in the AIL.
617 *
618 * To avoid this, just unpin the inode directly and return a LSN of -1 so the
619 * transaction committed code knows that it does not need to do any further
620 * processing on the item.
621 */
622STATIC xfs_lsn_t
623xfs_inode_item_committed(
624	struct xfs_log_item	*lip,
625	xfs_lsn_t		lsn)
626{
627	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
628	struct xfs_inode	*ip = iip->ili_inode;
629
630	if (xfs_iflags_test(ip, XFS_ISTALE)) {
631		xfs_inode_item_unpin(lip, 0);
632		return -1;
633	}
634	return lsn;
635}
636
637STATIC void
638xfs_inode_item_committing(
639	struct xfs_log_item	*lip,
640	xfs_lsn_t		lsn)
641{
642	INODE_ITEM(lip)->ili_last_lsn = lsn;
 
643}
644
645/*
646 * This is the ops vector shared by all buf log items.
647 */
648static const struct xfs_item_ops xfs_inode_item_ops = {
 
 
649	.iop_size	= xfs_inode_item_size,
650	.iop_format	= xfs_inode_item_format,
651	.iop_pin	= xfs_inode_item_pin,
652	.iop_unpin	= xfs_inode_item_unpin,
653	.iop_unlock	= xfs_inode_item_unlock,
654	.iop_committed	= xfs_inode_item_committed,
655	.iop_push	= xfs_inode_item_push,
656	.iop_committing = xfs_inode_item_committing,
657	.iop_error	= xfs_inode_item_error
658};
659
660
661/*
662 * Initialize the inode log item for a newly allocated (in-core) inode.
663 */
664void
665xfs_inode_item_init(
666	struct xfs_inode	*ip,
667	struct xfs_mount	*mp)
668{
669	struct xfs_inode_log_item *iip;
670
671	ASSERT(ip->i_itemp == NULL);
672	iip = ip->i_itemp = kmem_zone_zalloc(xfs_ili_zone, KM_SLEEP);
 
673
674	iip->ili_inode = ip;
 
675	xfs_log_item_init(mp, &iip->ili_item, XFS_LI_INODE,
676						&xfs_inode_item_ops);
677}
678
679/*
680 * Free the inode log item and any memory hanging off of it.
681 */
682void
683xfs_inode_item_destroy(
684	xfs_inode_t	*ip)
685{
686	kmem_free(ip->i_itemp->ili_item.li_lv_shadow);
687	kmem_zone_free(xfs_ili_zone, ip->i_itemp);
 
 
 
 
 
688}
689
690
691/*
692 * This is the inode flushing I/O completion routine.  It is called
693 * from interrupt level when the buffer containing the inode is
694 * flushed to disk.  It is responsible for removing the inode item
695 * from the AIL if it has not been re-logged, and unlocking the inode's
696 * flush lock.
697 *
698 * To reduce AIL lock traffic as much as possible, we scan the buffer log item
699 * list for other inodes that will run this function. We remove them from the
700 * buffer list so we can process all the inode IO completions in one AIL lock
701 * traversal.
702 */
703void
704xfs_iflush_done(
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
705	struct xfs_buf		*bp,
706	struct xfs_log_item	*lip)
707{
708	struct xfs_inode_log_item *iip;
709	struct xfs_log_item	*blip, *n;
710	struct xfs_ail		*ailp = lip->li_ailp;
711	int			need_ail = 0;
712	LIST_HEAD(tmp);
713
714	/*
715	 * Scan the buffer IO completions for other inodes being completed and
716	 * attach them to the current inode log item.
717	 */
718
719	list_add_tail(&lip->li_bio_list, &tmp);
720
721	list_for_each_entry_safe(blip, n, &bp->b_li_list, li_bio_list) {
722		if (lip->li_cb != xfs_iflush_done)
723			continue;
724
725		list_move_tail(&blip->li_bio_list, &tmp);
726		/*
727		 * while we have the item, do the unlocked check for needing
728		 * the AIL lock.
 
729		 */
730		iip = INODE_ITEM(blip);
731		if ((iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn) ||
732		    (blip->li_flags & XFS_LI_FAILED))
733			need_ail++;
734	}
735
736	/* make sure we capture the state of the initial inode. */
737	iip = INODE_ITEM(lip);
738	if ((iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) ||
739	    lip->li_flags & XFS_LI_FAILED)
740		need_ail++;
741
742	/*
743	 * We only want to pull the item from the AIL if it is
744	 * actually there and its location in the log has not
745	 * changed since we started the flush.  Thus, we only bother
746	 * if the ili_logged flag is set and the inode's lsn has not
747	 * changed.  First we check the lsn outside
748	 * the lock since it's cheaper, and then we recheck while
749	 * holding the lock before removing the inode from the AIL.
750	 */
751	if (need_ail) {
752		bool			mlip_changed = false;
753
754		/* this is an opencoded batch version of xfs_trans_ail_delete */
755		spin_lock(&ailp->ail_lock);
756		list_for_each_entry(blip, &tmp, li_bio_list) {
757			if (INODE_ITEM(blip)->ili_logged &&
758			    blip->li_lsn == INODE_ITEM(blip)->ili_flush_lsn)
759				mlip_changed |= xfs_ail_delete_one(ailp, blip);
760			else {
761				xfs_clear_li_failed(blip);
762			}
763		}
764
765		if (mlip_changed) {
766			if (!XFS_FORCED_SHUTDOWN(ailp->ail_mount))
767				xlog_assign_tail_lsn_locked(ailp->ail_mount);
768			if (list_empty(&ailp->ail_head))
769				wake_up_all(&ailp->ail_empty);
770		}
771		spin_unlock(&ailp->ail_lock);
772
773		if (mlip_changed)
774			xfs_log_space_wake(ailp->ail_mount);
775	}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
776
777	/*
778	 * clean up and unlock the flush lock now we are done. We can clear the
779	 * ili_last_fields bits now that we know that the data corresponding to
780	 * them is safely on disk.
781	 */
782	list_for_each_entry_safe(blip, n, &tmp, li_bio_list) {
783		list_del_init(&blip->li_bio_list);
784		iip = INODE_ITEM(blip);
785		iip->ili_logged = 0;
786		iip->ili_last_fields = 0;
787		xfs_ifunlock(iip->ili_inode);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
788	}
789	list_del(&tmp);
790}
791
792/*
793 * This is the inode flushing abort routine.  It is called from xfs_iflush when
794 * the filesystem is shutting down to clean up the inode state.  It is
795 * responsible for removing the inode item from the AIL if it has not been
796 * re-logged, and unlocking the inode's flush lock.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
797 */
798void
799xfs_iflush_abort(
800	xfs_inode_t		*ip,
801	bool			stale)
802{
803	xfs_inode_log_item_t	*iip = ip->i_itemp;
 
804
805	if (iip) {
806		if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
807			xfs_trans_ail_remove(&iip->ili_item,
808					     stale ? SHUTDOWN_LOG_IO_ERROR :
809						     SHUTDOWN_CORRUPT_INCORE);
810		}
811		iip->ili_logged = 0;
812		/*
813		 * Clear the ili_last_fields bits now that we know that the
814		 * data corresponding to them is safely on disk.
815		 */
816		iip->ili_last_fields = 0;
817		/*
818		 * Clear the inode logging fields so no more flushes are
819		 * attempted.
820		 */
821		iip->ili_fields = 0;
822		iip->ili_fsync_fields = 0;
823	}
 
824	/*
825	 * Release the inode's flush lock since we're done with it.
 
 
 
 
 
 
 
 
826	 */
827	xfs_ifunlock(ip);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
828}
829
 
 
 
 
 
 
830void
831xfs_istale_done(
832	struct xfs_buf		*bp,
833	struct xfs_log_item	*lip)
834{
835	xfs_iflush_abort(INODE_ITEM(lip)->ili_inode, true);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
836}
837
 
838/*
839 * convert an xfs_inode_log_format struct from the old 32 bit version
840 * (which can have different field alignments) to the native 64 bit version
841 */
842int
843xfs_inode_item_format_convert(
844	struct xfs_log_iovec		*buf,
845	struct xfs_inode_log_format	*in_f)
846{
847	struct xfs_inode_log_format_32	*in_f32 = buf->i_addr;
848
849	if (buf->i_len != sizeof(*in_f32))
 
850		return -EFSCORRUPTED;
 
851
852	in_f->ilf_type = in_f32->ilf_type;
853	in_f->ilf_size = in_f32->ilf_size;
854	in_f->ilf_fields = in_f32->ilf_fields;
855	in_f->ilf_asize = in_f32->ilf_asize;
856	in_f->ilf_dsize = in_f32->ilf_dsize;
857	in_f->ilf_ino = in_f32->ilf_ino;
858	memcpy(&in_f->ilf_u, &in_f32->ilf_u, sizeof(in_f->ilf_u));
859	in_f->ilf_blkno = in_f32->ilf_blkno;
860	in_f->ilf_len = in_f32->ilf_len;
861	in_f->ilf_boffset = in_f32->ilf_boffset;
862	return 0;
863}
v6.13.7
   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
   4 * All Rights Reserved.
 
 
 
 
 
 
 
 
 
 
 
 
 
   5 */
   6#include "xfs.h"
   7#include "xfs_fs.h"
   8#include "xfs_shared.h"
   9#include "xfs_format.h"
  10#include "xfs_log_format.h"
  11#include "xfs_trans_resv.h"
  12#include "xfs_mount.h"
  13#include "xfs_inode.h"
  14#include "xfs_trans.h"
  15#include "xfs_inode_item.h"
 
  16#include "xfs_trace.h"
  17#include "xfs_trans_priv.h"
  18#include "xfs_buf_item.h"
  19#include "xfs_log.h"
  20#include "xfs_log_priv.h"
  21#include "xfs_error.h"
  22#include "xfs_rtbitmap.h"
  23
  24#include <linux/iversion.h>
  25
  26struct kmem_cache	*xfs_ili_cache;		/* inode log item */
  27
  28static inline struct xfs_inode_log_item *INODE_ITEM(struct xfs_log_item *lip)
  29{
  30	return container_of(lip, struct xfs_inode_log_item, ili_item);
  31}
  32
  33static uint64_t
  34xfs_inode_item_sort(
  35	struct xfs_log_item	*lip)
  36{
  37	return INODE_ITEM(lip)->ili_inode->i_ino;
  38}
  39
  40#ifdef DEBUG_EXPENSIVE
  41static void
  42xfs_inode_item_precommit_check(
  43	struct xfs_inode	*ip)
  44{
  45	struct xfs_mount	*mp = ip->i_mount;
  46	struct xfs_dinode	*dip;
  47	xfs_failaddr_t		fa;
  48
  49	dip = kzalloc(mp->m_sb.sb_inodesize, GFP_KERNEL | GFP_NOFS);
  50	if (!dip) {
  51		ASSERT(dip != NULL);
  52		return;
  53	}
  54
  55	xfs_inode_to_disk(ip, dip, 0);
  56	xfs_dinode_calc_crc(mp, dip);
  57	fa = xfs_dinode_verify(mp, ip->i_ino, dip);
  58	if (fa) {
  59		xfs_inode_verifier_error(ip, -EFSCORRUPTED, __func__, dip,
  60				sizeof(*dip), fa);
  61		xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
  62		ASSERT(fa == NULL);
  63	}
  64	kfree(dip);
  65}
  66#else
  67# define xfs_inode_item_precommit_check(ip)	((void)0)
  68#endif
  69
  70/*
  71 * Prior to finally logging the inode, we have to ensure that all the
  72 * per-modification inode state changes are applied. This includes VFS inode
  73 * state updates, format conversions, verifier state synchronisation and
  74 * ensuring the inode buffer remains in memory whilst the inode is dirty.
  75 *
  76 * We have to be careful when we grab the inode cluster buffer due to lock
  77 * ordering constraints. The unlinked inode modifications (xfs_iunlink_item)
  78 * require AGI -> inode cluster buffer lock order. The inode cluster buffer is
  79 * not locked until ->precommit, so it happens after everything else has been
  80 * modified.
  81 *
  82 * Further, we have AGI -> AGF lock ordering, and with O_TMPFILE handling we
  83 * have AGI -> AGF -> iunlink item -> inode cluster buffer lock order. Hence we
  84 * cannot safely lock the inode cluster buffer in xfs_trans_log_inode() because
  85 * it can be called on a inode (e.g. via bumplink/droplink) before we take the
  86 * AGF lock modifying directory blocks.
  87 *
  88 * Rather than force a complete rework of all the transactions to call
  89 * xfs_trans_log_inode() once and once only at the end of every transaction, we
  90 * move the pinning of the inode cluster buffer to a ->precommit operation. This
  91 * matches how the xfs_iunlink_item locks the inode cluster buffer, and it
  92 * ensures that the inode cluster buffer locking is always done last in a
  93 * transaction. i.e. we ensure the lock order is always AGI -> AGF -> inode
  94 * cluster buffer.
  95 *
  96 * If we return the inode number as the precommit sort key then we'll also
  97 * guarantee that the order all inode cluster buffer locking is the same all the
  98 * inodes and unlink items in the transaction.
  99 */
 100static int
 101xfs_inode_item_precommit(
 102	struct xfs_trans	*tp,
 103	struct xfs_log_item	*lip)
 104{
 105	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 106	struct xfs_inode	*ip = iip->ili_inode;
 107	struct inode		*inode = VFS_I(ip);
 108	unsigned int		flags = iip->ili_dirty_flags;
 109
 110	/*
 111	 * Don't bother with i_lock for the I_DIRTY_TIME check here, as races
 112	 * don't matter - we either will need an extra transaction in 24 hours
 113	 * to log the timestamps, or will clear already cleared fields in the
 114	 * worst case.
 115	 */
 116	if (inode->i_state & I_DIRTY_TIME) {
 117		spin_lock(&inode->i_lock);
 118		inode->i_state &= ~I_DIRTY_TIME;
 119		spin_unlock(&inode->i_lock);
 120	}
 121
 122	/*
 123	 * If we're updating the inode core or the timestamps and it's possible
 124	 * to upgrade this inode to bigtime format, do so now.
 125	 */
 126	if ((flags & (XFS_ILOG_CORE | XFS_ILOG_TIMESTAMP)) &&
 127	    xfs_has_bigtime(ip->i_mount) &&
 128	    !xfs_inode_has_bigtime(ip)) {
 129		ip->i_diflags2 |= XFS_DIFLAG2_BIGTIME;
 130		flags |= XFS_ILOG_CORE;
 131	}
 132
 133	/*
 134	 * Inode verifiers do not check that the extent size hint is an integer
 135	 * multiple of the rt extent size on a directory with both rtinherit
 136	 * and extszinherit flags set.  If we're logging a directory that is
 137	 * misconfigured in this way, clear the hint.
 138	 */
 139	if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
 140	    (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) &&
 141	    xfs_extlen_to_rtxmod(ip->i_mount, ip->i_extsize) > 0) {
 142		ip->i_diflags &= ~(XFS_DIFLAG_EXTSIZE |
 143				   XFS_DIFLAG_EXTSZINHERIT);
 144		ip->i_extsize = 0;
 145		flags |= XFS_ILOG_CORE;
 146	}
 147
 148	/*
 149	 * Record the specific change for fdatasync optimisation. This allows
 150	 * fdatasync to skip log forces for inodes that are only timestamp
 151	 * dirty. Once we've processed the XFS_ILOG_IVERSION flag, convert it
 152	 * to XFS_ILOG_CORE so that the actual on-disk dirty tracking
 153	 * (ili_fields) correctly tracks that the version has changed.
 154	 */
 155	spin_lock(&iip->ili_lock);
 156	iip->ili_fsync_fields |= (flags & ~XFS_ILOG_IVERSION);
 157	if (flags & XFS_ILOG_IVERSION)
 158		flags = ((flags & ~XFS_ILOG_IVERSION) | XFS_ILOG_CORE);
 159
 160	if (!iip->ili_item.li_buf) {
 161		struct xfs_buf	*bp;
 162		int		error;
 163
 164		/*
 165		 * We hold the ILOCK here, so this inode is not going to be
 166		 * flushed while we are here. Further, because there is no
 167		 * buffer attached to the item, we know that there is no IO in
 168		 * progress, so nothing will clear the ili_fields while we read
 169		 * in the buffer. Hence we can safely drop the spin lock and
 170		 * read the buffer knowing that the state will not change from
 171		 * here.
 172		 */
 173		spin_unlock(&iip->ili_lock);
 174		error = xfs_imap_to_bp(ip->i_mount, tp, &ip->i_imap, &bp);
 175		if (error)
 176			return error;
 177
 178		/*
 179		 * We need an explicit buffer reference for the log item but
 180		 * don't want the buffer to remain attached to the transaction.
 181		 * Hold the buffer but release the transaction reference once
 182		 * we've attached the inode log item to the buffer log item
 183		 * list.
 184		 */
 185		xfs_buf_hold(bp);
 186		spin_lock(&iip->ili_lock);
 187		iip->ili_item.li_buf = bp;
 188		bp->b_flags |= _XBF_INODES;
 189		list_add_tail(&iip->ili_item.li_bio_list, &bp->b_li_list);
 190		xfs_trans_brelse(tp, bp);
 191	}
 192
 193	/*
 194	 * Always OR in the bits from the ili_last_fields field.  This is to
 195	 * coordinate with the xfs_iflush() and xfs_buf_inode_iodone() routines
 196	 * in the eventual clearing of the ili_fields bits.  See the big comment
 197	 * in xfs_iflush() for an explanation of this coordination mechanism.
 198	 */
 199	iip->ili_fields |= (flags | iip->ili_last_fields);
 200	spin_unlock(&iip->ili_lock);
 201
 202	xfs_inode_item_precommit_check(ip);
 203
 204	/*
 205	 * We are done with the log item transaction dirty state, so clear it so
 206	 * that it doesn't pollute future transactions.
 207	 */
 208	iip->ili_dirty_flags = 0;
 209	return 0;
 210}
 211
 212/*
 213 * The logged size of an inode fork is always the current size of the inode
 214 * fork. This means that when an inode fork is relogged, the size of the logged
 215 * region is determined by the current state, not the combination of the
 216 * previously logged state + the current state. This is different relogging
 217 * behaviour to most other log items which will retain the size of the
 218 * previously logged changes when smaller regions are relogged.
 219 *
 220 * Hence operations that remove data from the inode fork (e.g. shortform
 221 * dir/attr remove, extent form extent removal, etc), the size of the relogged
 222 * inode gets -smaller- rather than stays the same size as the previously logged
 223 * size and this can result in the committing transaction reducing the amount of
 224 * space being consumed by the CIL.
 225 */
 226STATIC void
 227xfs_inode_item_data_fork_size(
 228	struct xfs_inode_log_item *iip,
 229	int			*nvecs,
 230	int			*nbytes)
 231{
 232	struct xfs_inode	*ip = iip->ili_inode;
 233
 234	switch (ip->i_df.if_format) {
 235	case XFS_DINODE_FMT_EXTENTS:
 236		if ((iip->ili_fields & XFS_ILOG_DEXT) &&
 237		    ip->i_df.if_nextents > 0 &&
 238		    ip->i_df.if_bytes > 0) {
 239			/* worst case, doesn't subtract delalloc extents */
 240			*nbytes += xfs_inode_data_fork_size(ip);
 241			*nvecs += 1;
 242		}
 243		break;
 244	case XFS_DINODE_FMT_BTREE:
 245		if ((iip->ili_fields & XFS_ILOG_DBROOT) &&
 246		    ip->i_df.if_broot_bytes > 0) {
 247			*nbytes += ip->i_df.if_broot_bytes;
 248			*nvecs += 1;
 249		}
 250		break;
 251	case XFS_DINODE_FMT_LOCAL:
 252		if ((iip->ili_fields & XFS_ILOG_DDATA) &&
 253		    ip->i_df.if_bytes > 0) {
 254			*nbytes += xlog_calc_iovec_len(ip->i_df.if_bytes);
 255			*nvecs += 1;
 256		}
 257		break;
 258
 259	case XFS_DINODE_FMT_DEV:
 260		break;
 261	default:
 262		ASSERT(0);
 263		break;
 264	}
 265}
 266
 267STATIC void
 268xfs_inode_item_attr_fork_size(
 269	struct xfs_inode_log_item *iip,
 270	int			*nvecs,
 271	int			*nbytes)
 272{
 273	struct xfs_inode	*ip = iip->ili_inode;
 274
 275	switch (ip->i_af.if_format) {
 276	case XFS_DINODE_FMT_EXTENTS:
 277		if ((iip->ili_fields & XFS_ILOG_AEXT) &&
 278		    ip->i_af.if_nextents > 0 &&
 279		    ip->i_af.if_bytes > 0) {
 280			/* worst case, doesn't subtract unused space */
 281			*nbytes += xfs_inode_attr_fork_size(ip);
 282			*nvecs += 1;
 283		}
 284		break;
 285	case XFS_DINODE_FMT_BTREE:
 286		if ((iip->ili_fields & XFS_ILOG_ABROOT) &&
 287		    ip->i_af.if_broot_bytes > 0) {
 288			*nbytes += ip->i_af.if_broot_bytes;
 289			*nvecs += 1;
 290		}
 291		break;
 292	case XFS_DINODE_FMT_LOCAL:
 293		if ((iip->ili_fields & XFS_ILOG_ADATA) &&
 294		    ip->i_af.if_bytes > 0) {
 295			*nbytes += xlog_calc_iovec_len(ip->i_af.if_bytes);
 296			*nvecs += 1;
 297		}
 298		break;
 299	default:
 300		ASSERT(0);
 301		break;
 302	}
 303}
 304
 305/*
 306 * This returns the number of iovecs needed to log the given inode item.
 307 *
 308 * We need one iovec for the inode log format structure, one for the
 309 * inode core, and possibly one for the inode data/extents/b-tree root
 310 * and one for the inode attribute data/extents/b-tree root.
 311 */
 312STATIC void
 313xfs_inode_item_size(
 314	struct xfs_log_item	*lip,
 315	int			*nvecs,
 316	int			*nbytes)
 317{
 318	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 319	struct xfs_inode	*ip = iip->ili_inode;
 320
 321	*nvecs += 2;
 322	*nbytes += sizeof(struct xfs_inode_log_format) +
 323		   xfs_log_dinode_size(ip->i_mount);
 324
 325	xfs_inode_item_data_fork_size(iip, nvecs, nbytes);
 326	if (xfs_inode_has_attr_fork(ip))
 327		xfs_inode_item_attr_fork_size(iip, nvecs, nbytes);
 328}
 329
 330STATIC void
 331xfs_inode_item_format_data_fork(
 332	struct xfs_inode_log_item *iip,
 333	struct xfs_inode_log_format *ilf,
 334	struct xfs_log_vec	*lv,
 335	struct xfs_log_iovec	**vecp)
 336{
 337	struct xfs_inode	*ip = iip->ili_inode;
 338	size_t			data_bytes;
 339
 340	switch (ip->i_df.if_format) {
 341	case XFS_DINODE_FMT_EXTENTS:
 342		iip->ili_fields &=
 343			~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | XFS_ILOG_DEV);
 344
 345		if ((iip->ili_fields & XFS_ILOG_DEXT) &&
 346		    ip->i_df.if_nextents > 0 &&
 347		    ip->i_df.if_bytes > 0) {
 348			struct xfs_bmbt_rec *p;
 349
 350			ASSERT(xfs_iext_count(&ip->i_df) > 0);
 351
 352			p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IEXT);
 353			data_bytes = xfs_iextents_copy(ip, p, XFS_DATA_FORK);
 354			xlog_finish_iovec(lv, *vecp, data_bytes);
 355
 356			ASSERT(data_bytes <= ip->i_df.if_bytes);
 357
 358			ilf->ilf_dsize = data_bytes;
 359			ilf->ilf_size++;
 360		} else {
 361			iip->ili_fields &= ~XFS_ILOG_DEXT;
 362		}
 363		break;
 364	case XFS_DINODE_FMT_BTREE:
 365		iip->ili_fields &=
 366			~(XFS_ILOG_DDATA | XFS_ILOG_DEXT | XFS_ILOG_DEV);
 367
 368		if ((iip->ili_fields & XFS_ILOG_DBROOT) &&
 369		    ip->i_df.if_broot_bytes > 0) {
 370			ASSERT(ip->i_df.if_broot != NULL);
 371			xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IBROOT,
 372					ip->i_df.if_broot,
 373					ip->i_df.if_broot_bytes);
 374			ilf->ilf_dsize = ip->i_df.if_broot_bytes;
 375			ilf->ilf_size++;
 376		} else {
 377			ASSERT(!(iip->ili_fields &
 378				 XFS_ILOG_DBROOT));
 379			iip->ili_fields &= ~XFS_ILOG_DBROOT;
 380		}
 381		break;
 382	case XFS_DINODE_FMT_LOCAL:
 383		iip->ili_fields &=
 384			~(XFS_ILOG_DEXT | XFS_ILOG_DBROOT | XFS_ILOG_DEV);
 385		if ((iip->ili_fields & XFS_ILOG_DDATA) &&
 386		    ip->i_df.if_bytes > 0) {
 387			ASSERT(ip->i_df.if_data != NULL);
 388			ASSERT(ip->i_disk_size > 0);
 
 
 
 
 
 
 
 
 389			xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_ILOCAL,
 390					ip->i_df.if_data, ip->i_df.if_bytes);
 391			ilf->ilf_dsize = (unsigned)ip->i_df.if_bytes;
 392			ilf->ilf_size++;
 393		} else {
 394			iip->ili_fields &= ~XFS_ILOG_DDATA;
 395		}
 396		break;
 397	case XFS_DINODE_FMT_DEV:
 398		iip->ili_fields &=
 399			~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | XFS_ILOG_DEXT);
 400		if (iip->ili_fields & XFS_ILOG_DEV)
 401			ilf->ilf_u.ilfu_rdev = sysv_encode_dev(VFS_I(ip)->i_rdev);
 402		break;
 403	default:
 404		ASSERT(0);
 405		break;
 406	}
 407}
 408
 409STATIC void
 410xfs_inode_item_format_attr_fork(
 411	struct xfs_inode_log_item *iip,
 412	struct xfs_inode_log_format *ilf,
 413	struct xfs_log_vec	*lv,
 414	struct xfs_log_iovec	**vecp)
 415{
 416	struct xfs_inode	*ip = iip->ili_inode;
 417	size_t			data_bytes;
 418
 419	switch (ip->i_af.if_format) {
 420	case XFS_DINODE_FMT_EXTENTS:
 421		iip->ili_fields &=
 422			~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT);
 423
 424		if ((iip->ili_fields & XFS_ILOG_AEXT) &&
 425		    ip->i_af.if_nextents > 0 &&
 426		    ip->i_af.if_bytes > 0) {
 427			struct xfs_bmbt_rec *p;
 428
 429			ASSERT(xfs_iext_count(&ip->i_af) ==
 430				ip->i_af.if_nextents);
 431
 432			p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_EXT);
 433			data_bytes = xfs_iextents_copy(ip, p, XFS_ATTR_FORK);
 434			xlog_finish_iovec(lv, *vecp, data_bytes);
 435
 436			ilf->ilf_asize = data_bytes;
 437			ilf->ilf_size++;
 438		} else {
 439			iip->ili_fields &= ~XFS_ILOG_AEXT;
 440		}
 441		break;
 442	case XFS_DINODE_FMT_BTREE:
 443		iip->ili_fields &=
 444			~(XFS_ILOG_ADATA | XFS_ILOG_AEXT);
 445
 446		if ((iip->ili_fields & XFS_ILOG_ABROOT) &&
 447		    ip->i_af.if_broot_bytes > 0) {
 448			ASSERT(ip->i_af.if_broot != NULL);
 449
 450			xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_BROOT,
 451					ip->i_af.if_broot,
 452					ip->i_af.if_broot_bytes);
 453			ilf->ilf_asize = ip->i_af.if_broot_bytes;
 454			ilf->ilf_size++;
 455		} else {
 456			iip->ili_fields &= ~XFS_ILOG_ABROOT;
 457		}
 458		break;
 459	case XFS_DINODE_FMT_LOCAL:
 460		iip->ili_fields &=
 461			~(XFS_ILOG_AEXT | XFS_ILOG_ABROOT);
 462
 463		if ((iip->ili_fields & XFS_ILOG_ADATA) &&
 464		    ip->i_af.if_bytes > 0) {
 465			ASSERT(ip->i_af.if_data != NULL);
 
 
 
 
 
 
 
 
 466			xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_LOCAL,
 467					ip->i_af.if_data, ip->i_af.if_bytes);
 468			ilf->ilf_asize = (unsigned)ip->i_af.if_bytes;
 
 469			ilf->ilf_size++;
 470		} else {
 471			iip->ili_fields &= ~XFS_ILOG_ADATA;
 472		}
 473		break;
 474	default:
 475		ASSERT(0);
 476		break;
 477	}
 478}
 479
 480/*
 481 * Convert an incore timestamp to a log timestamp.  Note that the log format
 482 * specifies host endian format!
 483 */
 484static inline xfs_log_timestamp_t
 485xfs_inode_to_log_dinode_ts(
 486	struct xfs_inode		*ip,
 487	const struct timespec64		tv)
 488{
 489	struct xfs_log_legacy_timestamp	*lits;
 490	xfs_log_timestamp_t		its;
 491
 492	if (xfs_inode_has_bigtime(ip))
 493		return xfs_inode_encode_bigtime(tv);
 494
 495	lits = (struct xfs_log_legacy_timestamp *)&its;
 496	lits->t_sec = tv.tv_sec;
 497	lits->t_nsec = tv.tv_nsec;
 498
 499	return its;
 500}
 501
 502/*
 503 * The legacy DMAPI fields are only present in the on-disk and in-log inodes,
 504 * but not in the in-memory one.  But we are guaranteed to have an inode buffer
 505 * in memory when logging an inode, so we can just copy it from the on-disk
 506 * inode to the in-log inode here so that recovery of file system with these
 507 * fields set to non-zero values doesn't lose them.  For all other cases we zero
 508 * the fields.
 509 */
 510static void
 511xfs_copy_dm_fields_to_log_dinode(
 512	struct xfs_inode	*ip,
 513	struct xfs_log_dinode	*to)
 514{
 515	struct xfs_dinode	*dip;
 516
 517	dip = xfs_buf_offset(ip->i_itemp->ili_item.li_buf,
 518			     ip->i_imap.im_boffset);
 519
 520	if (xfs_iflags_test(ip, XFS_IPRESERVE_DM_FIELDS)) {
 521		to->di_dmevmask = be32_to_cpu(dip->di_dmevmask);
 522		to->di_dmstate = be16_to_cpu(dip->di_dmstate);
 523	} else {
 524		to->di_dmevmask = 0;
 525		to->di_dmstate = 0;
 526	}
 527}
 528
 529static inline void
 530xfs_inode_to_log_dinode_iext_counters(
 531	struct xfs_inode	*ip,
 532	struct xfs_log_dinode	*to)
 533{
 534	if (xfs_inode_has_large_extent_counts(ip)) {
 535		to->di_big_nextents = xfs_ifork_nextents(&ip->i_df);
 536		to->di_big_anextents = xfs_ifork_nextents(&ip->i_af);
 537		to->di_nrext64_pad = 0;
 538	} else {
 539		to->di_nextents = xfs_ifork_nextents(&ip->i_df);
 540		to->di_anextents = xfs_ifork_nextents(&ip->i_af);
 541	}
 542}
 543
 544static void
 545xfs_inode_to_log_dinode(
 546	struct xfs_inode	*ip,
 547	struct xfs_log_dinode	*to,
 548	xfs_lsn_t		lsn)
 549{
 
 550	struct inode		*inode = VFS_I(ip);
 551
 552	to->di_magic = XFS_DINODE_MAGIC;
 553	to->di_format = xfs_ifork_format(&ip->i_df);
 554	to->di_uid = i_uid_read(inode);
 555	to->di_gid = i_gid_read(inode);
 556	to->di_projid_lo = ip->i_projid & 0xffff;
 557	to->di_projid_hi = ip->i_projid >> 16;
 558
 559	to->di_atime = xfs_inode_to_log_dinode_ts(ip, inode_get_atime(inode));
 560	to->di_mtime = xfs_inode_to_log_dinode_ts(ip, inode_get_mtime(inode));
 561	to->di_ctime = xfs_inode_to_log_dinode_ts(ip, inode_get_ctime(inode));
 
 
 
 
 
 
 
 562	to->di_nlink = inode->i_nlink;
 563	to->di_gen = inode->i_generation;
 564	to->di_mode = inode->i_mode;
 565
 566	to->di_size = ip->i_disk_size;
 567	to->di_nblocks = ip->i_nblocks;
 568	to->di_extsize = ip->i_extsize;
 569	to->di_forkoff = ip->i_forkoff;
 570	to->di_aformat = xfs_ifork_format(&ip->i_af);
 571	to->di_flags = ip->i_diflags;
 572
 573	xfs_copy_dm_fields_to_log_dinode(ip, to);
 
 
 574
 575	/* log a dummy value to ensure log structure is fully initialised */
 576	to->di_next_unlinked = NULLAGINO;
 577
 578	if (xfs_has_v3inodes(ip->i_mount)) {
 579		to->di_version = 3;
 580		to->di_changecount = inode_peek_iversion(inode);
 581		to->di_crtime = xfs_inode_to_log_dinode_ts(ip, ip->i_crtime);
 582		to->di_flags2 = ip->i_diflags2;
 583		to->di_cowextsize = ip->i_cowextsize;
 
 584		to->di_ino = ip->i_ino;
 585		to->di_lsn = lsn;
 586		memset(to->di_pad2, 0, sizeof(to->di_pad2));
 587		uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid);
 588		to->di_v3_pad = 0;
 589
 590		/* dummy value for initialisation */
 591		to->di_crc = 0;
 592
 593		if (xfs_is_metadir_inode(ip))
 594			to->di_metatype = ip->i_metatype;
 595		else
 596			to->di_metatype = 0;
 597	} else {
 598		to->di_version = 2;
 599		to->di_flushiter = ip->i_flushiter;
 600		memset(to->di_v2_pad, 0, sizeof(to->di_v2_pad));
 601		to->di_metatype = 0;
 602	}
 603
 604	xfs_inode_to_log_dinode_iext_counters(ip, to);
 605}
 606
 607/*
 608 * Format the inode core. Current timestamp data is only in the VFS inode
 609 * fields, so we need to grab them from there. Hence rather than just copying
 610 * the XFS inode core structure, format the fields directly into the iovec.
 611 */
 612static void
 613xfs_inode_item_format_core(
 614	struct xfs_inode	*ip,
 615	struct xfs_log_vec	*lv,
 616	struct xfs_log_iovec	**vecp)
 617{
 618	struct xfs_log_dinode	*dic;
 619
 620	dic = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_ICORE);
 621	xfs_inode_to_log_dinode(ip, dic, ip->i_itemp->ili_item.li_lsn);
 622	xlog_finish_iovec(lv, *vecp, xfs_log_dinode_size(ip->i_mount));
 623}
 624
 625/*
 626 * This is called to fill in the vector of log iovecs for the given inode
 627 * log item.  It fills the first item with an inode log format structure,
 628 * the second with the on-disk inode structure, and a possible third and/or
 629 * fourth with the inode data/extents/b-tree root and inode attributes
 630 * data/extents/b-tree root.
 631 *
 632 * Note: Always use the 64 bit inode log format structure so we don't
 633 * leave an uninitialised hole in the format item on 64 bit systems. Log
 634 * recovery on 32 bit systems handles this just fine, so there's no reason
 635 * for not using an initialising the properly padded structure all the time.
 636 */
 637STATIC void
 638xfs_inode_item_format(
 639	struct xfs_log_item	*lip,
 640	struct xfs_log_vec	*lv)
 641{
 642	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 643	struct xfs_inode	*ip = iip->ili_inode;
 644	struct xfs_log_iovec	*vecp = NULL;
 645	struct xfs_inode_log_format *ilf;
 646
 
 
 647	ilf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_IFORMAT);
 648	ilf->ilf_type = XFS_LI_INODE;
 649	ilf->ilf_ino = ip->i_ino;
 650	ilf->ilf_blkno = ip->i_imap.im_blkno;
 651	ilf->ilf_len = ip->i_imap.im_len;
 652	ilf->ilf_boffset = ip->i_imap.im_boffset;
 653	ilf->ilf_fields = XFS_ILOG_CORE;
 654	ilf->ilf_size = 2; /* format + core */
 655
 656	/*
 657	 * make sure we don't leak uninitialised data into the log in the case
 658	 * when we don't log every field in the inode.
 659	 */
 660	ilf->ilf_dsize = 0;
 661	ilf->ilf_asize = 0;
 662	ilf->ilf_pad = 0;
 663	memset(&ilf->ilf_u, 0, sizeof(ilf->ilf_u));
 664
 665	xlog_finish_iovec(lv, vecp, sizeof(*ilf));
 666
 667	xfs_inode_item_format_core(ip, lv, &vecp);
 668	xfs_inode_item_format_data_fork(iip, ilf, lv, &vecp);
 669	if (xfs_inode_has_attr_fork(ip)) {
 670		xfs_inode_item_format_attr_fork(iip, ilf, lv, &vecp);
 671	} else {
 672		iip->ili_fields &=
 673			~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT);
 674	}
 675
 676	/* update the format with the exact fields we actually logged */
 677	ilf->ilf_fields |= (iip->ili_fields & ~XFS_ILOG_TIMESTAMP);
 678}
 679
 680/*
 681 * This is called to pin the inode associated with the inode log
 682 * item in memory so it cannot be written out.
 683 */
 684STATIC void
 685xfs_inode_item_pin(
 686	struct xfs_log_item	*lip)
 687{
 688	struct xfs_inode	*ip = INODE_ITEM(lip)->ili_inode;
 689
 690	xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
 691	ASSERT(lip->li_buf);
 692
 693	trace_xfs_inode_pin(ip, _RET_IP_);
 694	atomic_inc(&ip->i_pincount);
 695}
 696
 697
 698/*
 699 * This is called to unpin the inode associated with the inode log
 700 * item which was previously pinned with a call to xfs_inode_item_pin().
 701 *
 702 * Also wake up anyone in xfs_iunpin_wait() if the count goes to 0.
 703 *
 704 * Note that unpin can race with inode cluster buffer freeing marking the buffer
 705 * stale. In that case, flush completions are run from the buffer unpin call,
 706 * which may happen before the inode is unpinned. If we lose the race, there
 707 * will be no buffer attached to the log item, but the inode will be marked
 708 * XFS_ISTALE.
 709 */
 710STATIC void
 711xfs_inode_item_unpin(
 712	struct xfs_log_item	*lip,
 713	int			remove)
 714{
 715	struct xfs_inode	*ip = INODE_ITEM(lip)->ili_inode;
 716
 717	trace_xfs_inode_unpin(ip, _RET_IP_);
 718	ASSERT(lip->li_buf || xfs_iflags_test(ip, XFS_ISTALE));
 719	ASSERT(atomic_read(&ip->i_pincount) > 0);
 720	if (atomic_dec_and_test(&ip->i_pincount))
 721		wake_up_bit(&ip->i_flags, __XFS_IPINNED_BIT);
 722}
 723
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 724STATIC uint
 725xfs_inode_item_push(
 726	struct xfs_log_item	*lip,
 727	struct list_head	*buffer_list)
 728		__releases(&lip->li_ailp->ail_lock)
 729		__acquires(&lip->li_ailp->ail_lock)
 730{
 731	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 732	struct xfs_inode	*ip = iip->ili_inode;
 733	struct xfs_buf		*bp = lip->li_buf;
 734	uint			rval = XFS_ITEM_SUCCESS;
 735	int			error;
 736
 737	if (!bp || (ip->i_flags & XFS_ISTALE)) {
 738		/*
 739		 * Inode item/buffer is being aborted due to cluster
 740		 * buffer deletion. Trigger a log force to have that operation
 741		 * completed and items removed from the AIL before the next push
 742		 * attempt.
 743		 */
 744		return XFS_ITEM_PINNED;
 745	}
 746
 747	if (xfs_ipincount(ip) > 0 || xfs_buf_ispinned(bp))
 748		return XFS_ITEM_PINNED;
 
 
 
 
 
 
 
 
 749
 750	if (xfs_iflags_test(ip, XFS_IFLUSHING))
 751		return XFS_ITEM_FLUSHING;
 
 752
 753	if (!xfs_buf_trylock(bp))
 754		return XFS_ITEM_LOCKED;
 755
 756	spin_unlock(&lip->li_ailp->ail_lock);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 757
 758	/*
 759	 * We need to hold a reference for flushing the cluster buffer as it may
 760	 * fail the buffer without IO submission. In which case, we better get a
 761	 * reference for that completion because otherwise we don't get a
 762	 * reference for IO until we queue the buffer for delwri submission.
 763	 */
 764	xfs_buf_hold(bp);
 765	error = xfs_iflush_cluster(bp);
 
 
 
 
 
 
 
 
 
 766	if (!error) {
 767		if (!xfs_buf_delwri_queue(bp, buffer_list))
 768			rval = XFS_ITEM_FLUSHING;
 769		xfs_buf_relse(bp);
 770	} else {
 771		/*
 772		 * Release the buffer if we were unable to flush anything. On
 773		 * any other error, the buffer has already been released.
 774		 */
 775		if (error == -EAGAIN)
 776			xfs_buf_relse(bp);
 777		rval = XFS_ITEM_LOCKED;
 778	}
 779
 780	spin_lock(&lip->li_ailp->ail_lock);
 
 
 781	return rval;
 782}
 783
 784/*
 785 * Unlock the inode associated with the inode log item.
 786 */
 787STATIC void
 788xfs_inode_item_release(
 789	struct xfs_log_item	*lip)
 790{
 791	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 792	struct xfs_inode	*ip = iip->ili_inode;
 793	unsigned short		lock_flags;
 794
 795	ASSERT(ip->i_itemp != NULL);
 796	xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
 797
 798	lock_flags = iip->ili_lock_flags;
 799	iip->ili_lock_flags = 0;
 800	if (lock_flags)
 801		xfs_iunlock(ip, lock_flags);
 802}
 803
 804/*
 805 * This is called to find out where the oldest active copy of the inode log
 806 * item in the on disk log resides now that the last log write of it completed
 807 * at the given lsn.  Since we always re-log all dirty data in an inode, the
 808 * latest copy in the on disk log is the only one that matters.  Therefore,
 809 * simply return the given lsn.
 810 *
 811 * If the inode has been marked stale because the cluster is being freed, we
 812 * don't want to (re-)insert this inode into the AIL. There is a race condition
 813 * where the cluster buffer may be unpinned before the inode is inserted into
 814 * the AIL during transaction committed processing. If the buffer is unpinned
 815 * before the inode item has been committed and inserted, then it is possible
 816 * for the buffer to be written and IO completes before the inode is inserted
 817 * into the AIL. In that case, we'd be inserting a clean, stale inode into the
 818 * AIL which will never get removed. It will, however, get reclaimed which
 819 * triggers an assert in xfs_inode_free() complaining about freein an inode
 820 * still in the AIL.
 821 *
 822 * To avoid this, just unpin the inode directly and return a LSN of -1 so the
 823 * transaction committed code knows that it does not need to do any further
 824 * processing on the item.
 825 */
 826STATIC xfs_lsn_t
 827xfs_inode_item_committed(
 828	struct xfs_log_item	*lip,
 829	xfs_lsn_t		lsn)
 830{
 831	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 832	struct xfs_inode	*ip = iip->ili_inode;
 833
 834	if (xfs_iflags_test(ip, XFS_ISTALE)) {
 835		xfs_inode_item_unpin(lip, 0);
 836		return -1;
 837	}
 838	return lsn;
 839}
 840
 841STATIC void
 842xfs_inode_item_committing(
 843	struct xfs_log_item	*lip,
 844	xfs_csn_t		seq)
 845{
 846	INODE_ITEM(lip)->ili_commit_seq = seq;
 847	return xfs_inode_item_release(lip);
 848}
 849
 
 
 
 850static const struct xfs_item_ops xfs_inode_item_ops = {
 851	.iop_sort	= xfs_inode_item_sort,
 852	.iop_precommit	= xfs_inode_item_precommit,
 853	.iop_size	= xfs_inode_item_size,
 854	.iop_format	= xfs_inode_item_format,
 855	.iop_pin	= xfs_inode_item_pin,
 856	.iop_unpin	= xfs_inode_item_unpin,
 857	.iop_release	= xfs_inode_item_release,
 858	.iop_committed	= xfs_inode_item_committed,
 859	.iop_push	= xfs_inode_item_push,
 860	.iop_committing	= xfs_inode_item_committing,
 
 861};
 862
 863
 864/*
 865 * Initialize the inode log item for a newly allocated (in-core) inode.
 866 */
 867void
 868xfs_inode_item_init(
 869	struct xfs_inode	*ip,
 870	struct xfs_mount	*mp)
 871{
 872	struct xfs_inode_log_item *iip;
 873
 874	ASSERT(ip->i_itemp == NULL);
 875	iip = ip->i_itemp = kmem_cache_zalloc(xfs_ili_cache,
 876					      GFP_KERNEL | __GFP_NOFAIL);
 877
 878	iip->ili_inode = ip;
 879	spin_lock_init(&iip->ili_lock);
 880	xfs_log_item_init(mp, &iip->ili_item, XFS_LI_INODE,
 881						&xfs_inode_item_ops);
 882}
 883
 884/*
 885 * Free the inode log item and any memory hanging off of it.
 886 */
 887void
 888xfs_inode_item_destroy(
 889	struct xfs_inode	*ip)
 890{
 891	struct xfs_inode_log_item *iip = ip->i_itemp;
 892
 893	ASSERT(iip->ili_item.li_buf == NULL);
 894
 895	ip->i_itemp = NULL;
 896	kvfree(iip->ili_item.li_lv_shadow);
 897	kmem_cache_free(xfs_ili_cache, iip);
 898}
 899
 900
 901/*
 902 * We only want to pull the item from the AIL if it is actually there
 903 * and its location in the log has not changed since we started the
 904 * flush.  Thus, we only bother if the inode's lsn has not changed.
 
 
 
 
 
 
 
 905 */
 906static void
 907xfs_iflush_ail_updates(
 908	struct xfs_ail		*ailp,
 909	struct list_head	*list)
 910{
 911	struct xfs_log_item	*lip;
 912	xfs_lsn_t		tail_lsn = 0;
 913
 914	/* this is an opencoded batch version of xfs_trans_ail_delete */
 915	spin_lock(&ailp->ail_lock);
 916	list_for_each_entry(lip, list, li_bio_list) {
 917		xfs_lsn_t	lsn;
 918
 919		clear_bit(XFS_LI_FAILED, &lip->li_flags);
 920		if (INODE_ITEM(lip)->ili_flush_lsn != lip->li_lsn)
 921			continue;
 922
 923		/*
 924		 * dgc: Not sure how this happens, but it happens very
 925		 * occassionaly via generic/388.  xfs_iflush_abort() also
 926		 * silently handles this same "under writeback but not in AIL at
 927		 * shutdown" condition via xfs_trans_ail_delete().
 928		 */
 929		if (!test_bit(XFS_LI_IN_AIL, &lip->li_flags)) {
 930			ASSERT(xlog_is_shutdown(lip->li_log));
 931			continue;
 932		}
 933
 934		lsn = xfs_ail_delete_one(ailp, lip);
 935		if (!tail_lsn && lsn)
 936			tail_lsn = lsn;
 937	}
 938	xfs_ail_update_finish(ailp, tail_lsn);
 939}
 940
 941/*
 942 * Walk the list of inodes that have completed their IOs. If they are clean
 943 * remove them from the list and dissociate them from the buffer. Buffers that
 944 * are still dirty remain linked to the buffer and on the list. Caller must
 945 * handle them appropriately.
 946 */
 947static void
 948xfs_iflush_finish(
 949	struct xfs_buf		*bp,
 950	struct list_head	*list)
 951{
 952	struct xfs_log_item	*lip, *n;
 
 
 
 
 953
 954	list_for_each_entry_safe(lip, n, list, li_bio_list) {
 955		struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 956		bool	drop_buffer = false;
 
 957
 958		spin_lock(&iip->ili_lock);
 959
 
 
 
 
 
 960		/*
 961		 * Remove the reference to the cluster buffer if the inode is
 962		 * clean in memory and drop the buffer reference once we've
 963		 * dropped the locks we hold.
 964		 */
 965		ASSERT(iip->ili_item.li_buf == bp);
 966		if (!iip->ili_fields) {
 967			iip->ili_item.li_buf = NULL;
 968			list_del_init(&lip->li_bio_list);
 969			drop_buffer = true;
 970		}
 971		iip->ili_last_fields = 0;
 972		iip->ili_flush_lsn = 0;
 973		clear_bit(XFS_LI_FLUSHING, &lip->li_flags);
 974		spin_unlock(&iip->ili_lock);
 975		xfs_iflags_clear(iip->ili_inode, XFS_IFLUSHING);
 976		if (drop_buffer)
 977			xfs_buf_rele(bp);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 978	}
 979}
 980
 981/*
 982 * Inode buffer IO completion routine.  It is responsible for removing inodes
 983 * attached to the buffer from the AIL if they have not been re-logged and
 984 * completing the inode flush.
 985 */
 986void
 987xfs_buf_inode_iodone(
 988	struct xfs_buf		*bp)
 989{
 990	struct xfs_log_item	*lip, *n;
 991	LIST_HEAD(flushed_inodes);
 992	LIST_HEAD(ail_updates);
 993
 994	/*
 995	 * Pull the attached inodes from the buffer one at a time and take the
 996	 * appropriate action on them.
 997	 */
 998	list_for_each_entry_safe(lip, n, &bp->b_li_list, li_bio_list) {
 999		struct xfs_inode_log_item *iip = INODE_ITEM(lip);
1000
1001		if (xfs_iflags_test(iip->ili_inode, XFS_ISTALE)) {
1002			xfs_iflush_abort(iip->ili_inode);
1003			continue;
1004		}
1005		if (!iip->ili_last_fields)
1006			continue;
1007
1008		/* Do an unlocked check for needing the AIL lock. */
1009		if (iip->ili_flush_lsn == lip->li_lsn ||
1010		    test_bit(XFS_LI_FAILED, &lip->li_flags))
1011			list_move_tail(&lip->li_bio_list, &ail_updates);
1012		else
1013			list_move_tail(&lip->li_bio_list, &flushed_inodes);
1014	}
1015
1016	if (!list_empty(&ail_updates)) {
1017		xfs_iflush_ail_updates(bp->b_mount->m_ail, &ail_updates);
1018		list_splice_tail(&ail_updates, &flushed_inodes);
1019	}
1020
1021	xfs_iflush_finish(bp, &flushed_inodes);
1022	if (!list_empty(&flushed_inodes))
1023		list_splice_tail(&flushed_inodes, &bp->b_li_list);
1024}
1025
1026void
1027xfs_buf_inode_io_fail(
1028	struct xfs_buf		*bp)
1029{
1030	struct xfs_log_item	*lip;
1031
1032	list_for_each_entry(lip, &bp->b_li_list, li_bio_list) {
1033		set_bit(XFS_LI_FAILED, &lip->li_flags);
1034		clear_bit(XFS_LI_FLUSHING, &lip->li_flags);
1035	}
 
1036}
1037
1038/*
1039 * Clear the inode logging fields so no more flushes are attempted.  If we are
1040 * on a buffer list, it is now safe to remove it because the buffer is
1041 * guaranteed to be locked. The caller will drop the reference to the buffer
1042 * the log item held.
1043 */
1044static void
1045xfs_iflush_abort_clean(
1046	struct xfs_inode_log_item *iip)
1047{
1048	iip->ili_last_fields = 0;
1049	iip->ili_fields = 0;
1050	iip->ili_fsync_fields = 0;
1051	iip->ili_flush_lsn = 0;
1052	iip->ili_item.li_buf = NULL;
1053	list_del_init(&iip->ili_item.li_bio_list);
1054	clear_bit(XFS_LI_FLUSHING, &iip->ili_item.li_flags);
1055}
1056
1057/*
1058 * Abort flushing the inode from a context holding the cluster buffer locked.
1059 *
1060 * This is the normal runtime method of aborting writeback of an inode that is
1061 * attached to a cluster buffer. It occurs when the inode and the backing
1062 * cluster buffer have been freed (i.e. inode is XFS_ISTALE), or when cluster
1063 * flushing or buffer IO completion encounters a log shutdown situation.
1064 *
1065 * If we need to abort inode writeback and we don't already hold the buffer
1066 * locked, call xfs_iflush_shutdown_abort() instead as this should only ever be
1067 * necessary in a shutdown situation.
1068 */
1069void
1070xfs_iflush_abort(
1071	struct xfs_inode	*ip)
 
1072{
1073	struct xfs_inode_log_item *iip = ip->i_itemp;
1074	struct xfs_buf		*bp;
1075
1076	if (!iip) {
1077		/* clean inode, nothing to do */
1078		xfs_iflags_clear(ip, XFS_IFLUSHING);
1079		return;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1080	}
1081
1082	/*
1083	 * Remove the inode item from the AIL before we clear its internal
1084	 * state. Whilst the inode is in the AIL, it should have a valid buffer
1085	 * pointer for push operations to access - it is only safe to remove the
1086	 * inode from the buffer once it has been removed from the AIL.
1087	 *
1088	 * We also clear the failed bit before removing the item from the AIL
1089	 * as xfs_trans_ail_delete()->xfs_clear_li_failed() will release buffer
1090	 * references the inode item owns and needs to hold until we've fully
1091	 * aborted the inode log item and detached it from the buffer.
1092	 */
1093	clear_bit(XFS_LI_FAILED, &iip->ili_item.li_flags);
1094	xfs_trans_ail_delete(&iip->ili_item, 0);
1095
1096	/*
1097	 * Grab the inode buffer so can we release the reference the inode log
1098	 * item holds on it.
1099	 */
1100	spin_lock(&iip->ili_lock);
1101	bp = iip->ili_item.li_buf;
1102	xfs_iflush_abort_clean(iip);
1103	spin_unlock(&iip->ili_lock);
1104
1105	xfs_iflags_clear(ip, XFS_IFLUSHING);
1106	if (bp)
1107		xfs_buf_rele(bp);
1108}
1109
1110/*
1111 * Abort an inode flush in the case of a shutdown filesystem. This can be called
1112 * from anywhere with just an inode reference and does not require holding the
1113 * inode cluster buffer locked. If the inode is attached to a cluster buffer,
1114 * it will grab and lock it safely, then abort the inode flush.
1115 */
1116void
1117xfs_iflush_shutdown_abort(
1118	struct xfs_inode	*ip)
 
1119{
1120	struct xfs_inode_log_item *iip = ip->i_itemp;
1121	struct xfs_buf		*bp;
1122
1123	if (!iip) {
1124		/* clean inode, nothing to do */
1125		xfs_iflags_clear(ip, XFS_IFLUSHING);
1126		return;
1127	}
1128
1129	spin_lock(&iip->ili_lock);
1130	bp = iip->ili_item.li_buf;
1131	if (!bp) {
1132		spin_unlock(&iip->ili_lock);
1133		xfs_iflush_abort(ip);
1134		return;
1135	}
1136
1137	/*
1138	 * We have to take a reference to the buffer so that it doesn't get
1139	 * freed when we drop the ili_lock and then wait to lock the buffer.
1140	 * We'll clean up the extra reference after we pick up the ili_lock
1141	 * again.
1142	 */
1143	xfs_buf_hold(bp);
1144	spin_unlock(&iip->ili_lock);
1145	xfs_buf_lock(bp);
1146
1147	spin_lock(&iip->ili_lock);
1148	if (!iip->ili_item.li_buf) {
1149		/*
1150		 * Raced with another removal, hold the only reference
1151		 * to bp now. Inode should not be in the AIL now, so just clean
1152		 * up and return;
1153		 */
1154		ASSERT(list_empty(&iip->ili_item.li_bio_list));
1155		ASSERT(!test_bit(XFS_LI_IN_AIL, &iip->ili_item.li_flags));
1156		xfs_iflush_abort_clean(iip);
1157		spin_unlock(&iip->ili_lock);
1158		xfs_iflags_clear(ip, XFS_IFLUSHING);
1159		xfs_buf_relse(bp);
1160		return;
1161	}
1162
1163	/*
1164	 * Got two references to bp. The first will get dropped by
1165	 * xfs_iflush_abort() when the item is removed from the buffer list, but
1166	 * we can't drop our reference until _abort() returns because we have to
1167	 * unlock the buffer as well. Hence we abort and then unlock and release
1168	 * our reference to the buffer.
1169	 */
1170	ASSERT(iip->ili_item.li_buf == bp);
1171	spin_unlock(&iip->ili_lock);
1172	xfs_iflush_abort(ip);
1173	xfs_buf_relse(bp);
1174}
1175
1176
1177/*
1178 * convert an xfs_inode_log_format struct from the old 32 bit version
1179 * (which can have different field alignments) to the native 64 bit version
1180 */
1181int
1182xfs_inode_item_format_convert(
1183	struct xfs_log_iovec		*buf,
1184	struct xfs_inode_log_format	*in_f)
1185{
1186	struct xfs_inode_log_format_32	*in_f32 = buf->i_addr;
1187
1188	if (buf->i_len != sizeof(*in_f32)) {
1189		XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL);
1190		return -EFSCORRUPTED;
1191	}
1192
1193	in_f->ilf_type = in_f32->ilf_type;
1194	in_f->ilf_size = in_f32->ilf_size;
1195	in_f->ilf_fields = in_f32->ilf_fields;
1196	in_f->ilf_asize = in_f32->ilf_asize;
1197	in_f->ilf_dsize = in_f32->ilf_dsize;
1198	in_f->ilf_ino = in_f32->ilf_ino;
1199	memcpy(&in_f->ilf_u, &in_f32->ilf_u, sizeof(in_f->ilf_u));
1200	in_f->ilf_blkno = in_f32->ilf_blkno;
1201	in_f->ilf_len = in_f32->ilf_len;
1202	in_f->ilf_boffset = in_f32->ilf_boffset;
1203	return 0;
1204}