1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
7 #include "libxfs_priv.h"
11 #include "xfs_shared.h"
12 #include "xfs_format.h"
13 #include "xfs_log_format.h"
14 #include "xfs_trans_resv.h"
15 #include "xfs_mount.h"
16 #include "xfs_defer.h"
17 #include "xfs_inode_buf.h"
18 #include "xfs_inode_fork.h"
19 #include "xfs_inode.h"
20 #include "xfs_trans.h"
22 #include "xfs_bmap_btree.h"
23 #include "xfs_trans_space.h"
24 #include "xfs_ialloc.h"
25 #include "xfs_alloc.h"
27 #include "xfs_da_format.h"
28 #include "xfs_da_btree.h"
29 #include "xfs_dir2_priv.h"
32 * Calculate the worst case log unit reservation for a given superblock
33 * configuration. Copied and munged from the kernel code, and assumes a
34 * worse case header usage (maximum log buffer sizes)
37 xfs_log_calc_unit_res(
42 int iclog_header_size
;
46 if (xfs_sb_version_haslogv2(&mp
->m_sb
)) {
47 iclog_size
= XLOG_MAX_RECORD_BSIZE
;
48 iclog_header_size
= BBTOB(iclog_size
/ XLOG_HEADER_CYCLE_SIZE
);
50 iclog_size
= XLOG_BIG_RECORD_BSIZE
;
51 iclog_header_size
= BBSIZE
;
55 * Permanent reservations have up to 'cnt'-1 active log operations
56 * in the log. A unit in this case is the amount of space for one
57 * of these log operations. Normal reservations have a cnt of 1
58 * and their unit amount is the total amount of space required.
60 * The following lines of code account for non-transaction data
61 * which occupy space in the on-disk log.
63 * Normal form of a transaction is:
64 * <oph><trans-hdr><start-oph><reg1-oph><reg1><reg2-oph>...<commit-oph>
65 * and then there are LR hdrs, split-recs and roundoff at end of syncs.
67 * We need to account for all the leadup data and trailer data
68 * around the transaction data.
69 * And then we need to account for the worst case in terms of using
71 * The worst case will happen if:
72 * - the placement of the transaction happens to be such that the
73 * roundoff is at its maximum
74 * - the transaction data is synced before the commit record is synced
75 * i.e. <transaction-data><roundoff> | <commit-rec><roundoff>
76 * Therefore the commit record is in its own Log Record.
77 * This can happen as the commit record is called with its
78 * own region to xlog_write().
79 * This then means that in the worst case, roundoff can happen for
80 * the commit-rec as well.
81 * The commit-rec is smaller than padding in this scenario and so it is
82 * not added separately.
85 /* for trans header */
86 unit_bytes
+= sizeof(xlog_op_header_t
);
87 unit_bytes
+= sizeof(xfs_trans_header_t
);
90 unit_bytes
+= sizeof(xlog_op_header_t
);
93 * for LR headers - the space for data in an iclog is the size minus
94 * the space used for the headers. If we use the iclog size, then we
95 * undercalculate the number of headers required.
97 * Furthermore - the addition of op headers for split-recs might
98 * increase the space required enough to require more log and op
99 * headers, so take that into account too.
101 * IMPORTANT: This reservation makes the assumption that if this
102 * transaction is the first in an iclog and hence has the LR headers
103 * accounted to it, then the remaining space in the iclog is
104 * exclusively for this transaction. i.e. if the transaction is larger
105 * than the iclog, it will be the only thing in that iclog.
106 * Fundamentally, this means we must pass the entire log vector to
107 * xlog_write to guarantee this.
109 iclog_space
= iclog_size
- iclog_header_size
;
110 num_headers
= howmany(unit_bytes
, iclog_space
);
112 /* for split-recs - ophdrs added when data split over LRs */
113 unit_bytes
+= sizeof(xlog_op_header_t
) * num_headers
;
115 /* add extra header reservations if we overrun */
116 while (!num_headers
||
117 howmany(unit_bytes
, iclog_space
) > num_headers
) {
118 unit_bytes
+= sizeof(xlog_op_header_t
);
121 unit_bytes
+= iclog_header_size
* num_headers
;
123 /* for commit-rec LR header - note: padding will subsume the ophdr */
124 unit_bytes
+= iclog_header_size
;
126 /* for roundoff padding for transaction data and one for commit record */
127 if (xfs_sb_version_haslogv2(&mp
->m_sb
) && mp
->m_sb
.sb_logsunit
> 1) {
128 /* log su roundoff */
129 unit_bytes
+= 2 * mp
->m_sb
.sb_logsunit
;
132 unit_bytes
+= 2 * BBSIZE
;
139 * Change the requested timestamp in the given inode.
141 * This was once shared with the kernel, but has diverged to the point
142 * where it's no longer worth the hassle of maintaining common code.
145 libxfs_trans_ichgtime(
146 struct xfs_trans
*tp
,
147 struct xfs_inode
*ip
,
153 gettimeofday(&stv
, (struct timezone
*)0);
154 tv
.tv_sec
= stv
.tv_sec
;
155 tv
.tv_nsec
= stv
.tv_usec
* 1000;
156 if (flags
& XFS_ICHGTIME_MOD
)
157 VFS_I(ip
)->i_mtime
= tv
;
158 if (flags
& XFS_ICHGTIME_CHG
)
159 VFS_I(ip
)->i_ctime
= tv
;
160 if (flags
& XFS_ICHGTIME_CREATE
) {
161 ip
->i_d
.di_crtime
.t_sec
= (int32_t)tv
.tv_sec
;
162 ip
->i_d
.di_crtime
.t_nsec
= (int32_t)tv
.tv_nsec
;
168 struct xfs_inode
*ip
,
171 /* can't set PREALLOC this way, just preserve it */
173 (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
175 if (xflags
& FS_XFLAG_IMMUTABLE
)
176 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
177 if (xflags
& FS_XFLAG_APPEND
)
178 di_flags
|= XFS_DIFLAG_APPEND
;
179 if (xflags
& FS_XFLAG_SYNC
)
180 di_flags
|= XFS_DIFLAG_SYNC
;
181 if (xflags
& FS_XFLAG_NOATIME
)
182 di_flags
|= XFS_DIFLAG_NOATIME
;
183 if (xflags
& FS_XFLAG_NODUMP
)
184 di_flags
|= XFS_DIFLAG_NODUMP
;
185 if (xflags
& FS_XFLAG_NODEFRAG
)
186 di_flags
|= XFS_DIFLAG_NODEFRAG
;
187 if (xflags
& FS_XFLAG_FILESTREAM
)
188 di_flags
|= XFS_DIFLAG_FILESTREAM
;
189 if (S_ISDIR(VFS_I(ip
)->i_mode
)) {
190 if (xflags
& FS_XFLAG_RTINHERIT
)
191 di_flags
|= XFS_DIFLAG_RTINHERIT
;
192 if (xflags
& FS_XFLAG_NOSYMLINKS
)
193 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
194 if (xflags
& FS_XFLAG_EXTSZINHERIT
)
195 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
196 if (xflags
& FS_XFLAG_PROJINHERIT
)
197 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
198 } else if (S_ISREG(VFS_I(ip
)->i_mode
)) {
199 if (xflags
& FS_XFLAG_REALTIME
)
200 di_flags
|= XFS_DIFLAG_REALTIME
;
201 if (xflags
& FS_XFLAG_EXTSIZE
)
202 di_flags
|= XFS_DIFLAG_EXTSIZE
;
210 struct xfs_inode
*ip
,
214 (ip
->i_d
.di_flags2
& XFS_DIFLAG2_REFLINK
);
216 if (xflags
& FS_XFLAG_DAX
)
217 di_flags2
|= XFS_DIFLAG2_DAX
;
218 if (xflags
& FS_XFLAG_COWEXTSIZE
)
219 di_flags2
|= XFS_DIFLAG2_COWEXTSIZE
;
225 * Allocate an inode on disk and return a copy of its in-core version.
226 * Set mode, nlink, and rdev appropriately within the inode.
227 * The uid and gid for the inode are set according to the contents of
228 * the given cred structure.
230 * This was once shared with the kernel, but has diverged to the point
231 * where it's no longer worth the hassle of maintaining common code.
242 xfs_buf_t
**ialloc_context
,
251 * Call the space management code to pick
252 * the on-disk inode to be allocated.
254 error
= xfs_dialloc(tp
, pip
? pip
->i_ino
: 0, mode
,
255 ialloc_context
, &ino
);
258 if (*ialloc_context
|| ino
== NULLFSINO
) {
262 ASSERT(*ialloc_context
== NULL
);
264 error
= xfs_trans_iget(tp
->t_mountp
, tp
, ino
, 0, 0, &ip
);
269 VFS_I(ip
)->i_mode
= mode
;
270 set_nlink(VFS_I(ip
), nlink
);
271 ip
->i_d
.di_uid
= cr
->cr_uid
;
272 ip
->i_d
.di_gid
= cr
->cr_gid
;
273 xfs_set_projid(&ip
->i_d
, pip
? 0 : fsx
->fsx_projid
);
274 xfs_trans_ichgtime(tp
, ip
, XFS_ICHGTIME_CHG
| XFS_ICHGTIME_MOD
);
277 * We only support filesystems that understand v2 format inodes. So if
278 * this is currently an old format inode, then change the inode version
279 * number now. This way we only do the conversion here rather than here
280 * and in the flush/logging code.
282 if (ip
->i_d
.di_version
== 1) {
283 ip
->i_d
.di_version
= 2;
285 * old link count, projid_lo/hi field, pad field
290 if (pip
&& (VFS_I(pip
)->i_mode
& S_ISGID
)) {
291 ip
->i_d
.di_gid
= pip
->i_d
.di_gid
;
292 if ((VFS_I(pip
)->i_mode
& S_ISGID
) && (mode
& S_IFMT
) == S_IFDIR
)
293 VFS_I(ip
)->i_mode
|= S_ISGID
;
297 ip
->i_d
.di_nextents
= 0;
298 ASSERT(ip
->i_d
.di_nblocks
== 0);
299 ip
->i_d
.di_extsize
= pip
? 0 : fsx
->fsx_extsize
;
300 ip
->i_d
.di_dmevmask
= 0;
301 ip
->i_d
.di_dmstate
= 0;
302 ip
->i_d
.di_flags
= pip
? 0 : xfs_flags2diflags(ip
, fsx
->fsx_xflags
);
304 if (ip
->i_d
.di_version
== 3) {
305 ASSERT(ip
->i_d
.di_ino
== ino
);
306 ASSERT(uuid_equal(&ip
->i_d
.di_uuid
, &mp
->m_sb
.sb_meta_uuid
));
307 VFS_I(ip
)->i_version
= 1;
308 ip
->i_d
.di_flags2
= pip
? 0 : xfs_flags2diflags2(ip
,
310 ip
->i_d
.di_crtime
.t_sec
= (int32_t)VFS_I(ip
)->i_mtime
.tv_sec
;
311 ip
->i_d
.di_crtime
.t_nsec
= (int32_t)VFS_I(ip
)->i_mtime
.tv_nsec
;
312 ip
->i_d
.di_cowextsize
= pip
? 0 : fsx
->fsx_cowextsize
;
315 flags
= XFS_ILOG_CORE
;
316 switch (mode
& S_IFMT
) {
319 /* doesn't make sense to set an rdev for these */
324 ip
->i_d
.di_format
= XFS_DINODE_FMT_DEV
;
325 flags
|= XFS_ILOG_DEV
;
326 VFS_I(ip
)->i_rdev
= rdev
;
330 if (pip
&& (pip
->i_d
.di_flags
& XFS_DIFLAG_ANY
)) {
333 if ((mode
& S_IFMT
) == S_IFDIR
) {
334 if (pip
->i_d
.di_flags
& XFS_DIFLAG_RTINHERIT
)
335 di_flags
|= XFS_DIFLAG_RTINHERIT
;
336 if (pip
->i_d
.di_flags
& XFS_DIFLAG_EXTSZINHERIT
) {
337 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
338 ip
->i_d
.di_extsize
= pip
->i_d
.di_extsize
;
341 if (pip
->i_d
.di_flags
& XFS_DIFLAG_RTINHERIT
) {
342 di_flags
|= XFS_DIFLAG_REALTIME
;
344 if (pip
->i_d
.di_flags
& XFS_DIFLAG_EXTSZINHERIT
) {
345 di_flags
|= XFS_DIFLAG_EXTSIZE
;
346 ip
->i_d
.di_extsize
= pip
->i_d
.di_extsize
;
349 if (pip
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
350 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
351 ip
->i_d
.di_flags
|= di_flags
;
355 ip
->i_d
.di_format
= XFS_DINODE_FMT_EXTENTS
;
356 ip
->i_df
.if_flags
= XFS_IFEXTENTS
;
357 ip
->i_df
.if_bytes
= 0;
358 ip
->i_df
.if_u1
.if_root
= NULL
;
363 /* Attribute fork settings for new inode. */
364 ip
->i_d
.di_aformat
= XFS_DINODE_FMT_EXTENTS
;
365 ip
->i_d
.di_anextents
= 0;
368 * set up the inode ops structure that the libxfs code relies on
371 ip
->d_ops
= ip
->i_mount
->m_dir_inode_ops
;
373 ip
->d_ops
= ip
->i_mount
->m_nondir_inode_ops
;
376 * Log the new values stuffed into the inode.
378 xfs_trans_log_inode(tp
, ip
, flags
);
387 struct xfs_icdinode
*dip
;
389 struct xfs_ifork
*ifp
; /* inode fork pointer */
390 struct xfs_iext_cursor icur
;
393 printf("Inode %lx\n", (unsigned long)ip
);
394 printf(" i_ino %llx\n", (unsigned long long)ip
->i_ino
);
396 if (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)
399 printf(" i_df.if_bytes %d\n", ip
->i_df
.if_bytes
);
400 printf(" i_df.if_u1.if_root/if_data %lx\n",
401 (unsigned long)ip
->i_df
.if_u1
.if_root
);
402 if (ip
->i_df
.if_flags
& XFS_IFEXTENTS
) {
403 ifp
= XFS_IFORK_PTR(ip
, XFS_DATA_FORK
);
404 for_each_xfs_iext(ifp
, &icur
, &rec
) {
405 printf("\t%d: startoff %llu, startblock 0x%llx,"
406 " blockcount %llu, state %d\n",
407 i
, (unsigned long long)rec
.br_startoff
,
408 (unsigned long long)rec
.br_startblock
,
409 (unsigned long long)rec
.br_blockcount
,
414 printf(" i_df.if_broot %lx\n", (unsigned long)ip
->i_df
.if_broot
);
415 printf(" i_df.if_broot_bytes %x\n", ip
->i_df
.if_broot_bytes
);
418 printf("\nOn disk portion\n");
419 printf(" di_mode %o\n", VFS_I(ip
)->i_mode
);
420 printf(" di_version %x\n", (uint
)dip
->di_version
);
421 switch (ip
->i_d
.di_format
) {
422 case XFS_DINODE_FMT_LOCAL
:
423 printf(" Inline inode\n");
425 case XFS_DINODE_FMT_EXTENTS
:
426 printf(" Extents inode\n");
428 case XFS_DINODE_FMT_BTREE
:
429 printf(" B-tree inode\n");
432 printf(" Other inode\n");
435 printf(" di_nlink %x\n", VFS_I(ip
)->i_nlink
);
436 printf(" di_uid %d\n", dip
->di_uid
);
437 printf(" di_gid %d\n", dip
->di_gid
);
438 printf(" di_nextents %d\n", dip
->di_nextents
);
439 printf(" di_size %llu\n", (unsigned long long)dip
->di_size
);
440 printf(" di_gen %x\n", VFS_I(ip
)->i_generation
);
441 printf(" di_extsize %d\n", dip
->di_extsize
);
442 printf(" di_flags %x\n", dip
->di_flags
);
443 printf(" di_nblocks %llu\n", (unsigned long long)dip
->di_nblocks
);
447 * Writes a modified inode's changes out to the inode's on disk home.
448 * Originally based on xfs_iflush_int() from xfs_inode.c in the kernel.
451 libxfs_iflush_int(xfs_inode_t
*ip
, xfs_buf_t
*bp
)
453 xfs_inode_log_item_t
*iip
;
457 ASSERT(bp
-b_log_item
!= NULL
);
458 ASSERT(ip
->i_d
.di_format
!= XFS_DINODE_FMT_BTREE
||
459 ip
->i_d
.di_nextents
> ip
->i_df
.if_ext_max
);
460 ASSERT(ip
->i_d
.di_version
> 1);
465 /* set *dip = inode's place in the buffer */
466 dip
= xfs_buf_offset(bp
, ip
->i_imap
.im_boffset
);
468 ASSERT(ip
->i_d
.di_magic
== XFS_DINODE_MAGIC
);
470 ASSERT( (ip
->i_d
.di_format
== XFS_DINODE_FMT_EXTENTS
) ||
471 (ip
->i_d
.di_format
== XFS_DINODE_FMT_BTREE
) );
472 } else if (XFS_ISDIR(ip
)) {
473 ASSERT( (ip
->i_d
.di_format
== XFS_DINODE_FMT_EXTENTS
) ||
474 (ip
->i_d
.di_format
== XFS_DINODE_FMT_BTREE
) ||
475 (ip
->i_d
.di_format
== XFS_DINODE_FMT_LOCAL
) );
477 ASSERT(ip
->i_d
.di_nextents
+ip
->i_d
.di_anextents
<= ip
->i_d
.di_nblocks
);
478 ASSERT(ip
->i_d
.di_forkoff
<= mp
->m_sb
.sb_inodesize
);
480 /* bump the change count on v3 inodes */
481 if (ip
->i_d
.di_version
== 3)
482 VFS_I(ip
)->i_version
++;
484 /* Check the inline fork data before we write out. */
485 if (!libxfs_inode_verify_forks(ip
, &xfs_default_ifork_ops
))
486 return -EFSCORRUPTED
;
489 * Copy the dirty parts of the inode into the on-disk
490 * inode. We always copy out the core of the inode,
491 * because if the inode is dirty at all the core must
494 xfs_inode_to_disk(ip
, dip
, iip
->ili_item
.li_lsn
);
496 xfs_iflush_fork(ip
, dip
, iip
, XFS_DATA_FORK
);
498 xfs_iflush_fork(ip
, dip
, iip
, XFS_ATTR_FORK
);
500 /* generate the checksum. */
501 xfs_dinode_calc_crc(mp
, dip
);
507 libxfs_mod_incore_sb(
508 struct xfs_mount
*mp
,
513 long long lcounter
; /* long counter for 64 bit fields */
516 case XFS_TRANS_SB_FDBLOCKS
:
517 lcounter
= (long long)mp
->m_sb
.sb_fdblocks
;
521 mp
->m_sb
.sb_fdblocks
= lcounter
;
530 * This routine allocates disk space for the given file.
531 * Originally derived from xfs_alloc_file_space().
534 libxfs_alloc_file_space(
543 xfs_filblks_t datablocks
;
544 xfs_filblks_t allocated_fsb
;
545 xfs_filblks_t allocatesize_fsb
;
546 xfs_bmbt_irec_t
*imapp
;
547 xfs_bmbt_irec_t imaps
[1];
550 xfs_fileoff_t startoffset_fsb
;
562 xfs_bmapi_flags
= alloc_type
? XFS_BMAPI_PREALLOC
: 0;
564 startoffset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
565 allocatesize_fsb
= XFS_B_TO_FSB(mp
, count
);
567 /* allocate file space until done or until there is an error */
568 while (allocatesize_fsb
&& !error
) {
569 datablocks
= allocatesize_fsb
;
571 resblks
= (uint
)XFS_DIOSTRAT_SPACE_RES(mp
, datablocks
);
572 error
= xfs_trans_alloc(mp
, &M_RES(mp
)->tr_write
, resblks
,
575 * Check for running out of space
578 ASSERT(error
== -ENOSPC
);
581 xfs_trans_ijoin(tp
, ip
, 0);
583 error
= xfs_bmapi_write(tp
, ip
, startoffset_fsb
, allocatesize_fsb
,
584 xfs_bmapi_flags
, 0, imapp
, &reccount
);
590 * Complete the transaction
592 error
= xfs_trans_commit(tp
);
596 allocated_fsb
= imapp
->br_blockcount
;
600 startoffset_fsb
+= allocated_fsb
;
601 allocatesize_fsb
-= allocated_fsb
;
605 error0
: /* Cancel bmap, cancel trans */
606 xfs_trans_cancel(tp
);
611 * Wrapper around call to libxfs_ialloc. Takes care of committing and
612 * allocating a new transaction as needed.
614 * Originally there were two copies of this code - one in mkfs, the
615 * other in repair - now there is just the one.
628 xfs_buf_t
*ialloc_context
;
632 ialloc_context
= (xfs_buf_t
*)0;
633 error
= libxfs_ialloc(*tp
, pip
, mode
, nlink
, rdev
, cr
, fsx
,
634 &ialloc_context
, &ip
);
639 if (!ialloc_context
&& !ip
) {
644 if (ialloc_context
) {
646 xfs_trans_bhold(*tp
, ialloc_context
);
648 error
= xfs_trans_roll(tp
);
650 fprintf(stderr
, _("%s: cannot duplicate transaction: %s\n"),
651 progname
, strerror(error
));
654 xfs_trans_bjoin(*tp
, ialloc_context
);
655 error
= libxfs_ialloc(*tp
, pip
, mode
, nlink
, rdev
, cr
,
656 fsx
, &ialloc_context
, &ip
);
668 * Userspace versions of common diagnostic routines (varargs fun).
671 libxfs_fs_repair_cmn_err(int level
, xfs_mount_t
*mp
, char *fmt
, ...)
676 vfprintf(stderr
, fmt
, ap
);
677 fprintf(stderr
, " This is a bug.\n");
678 fprintf(stderr
, "%s version %s\n", progname
, VERSION
);
680 "Please capture the filesystem metadata with xfs_metadump and\n"
681 "report it to linux-xfs@vger.kernel.org\n");
686 libxfs_fs_cmn_err(int level
, xfs_mount_t
*mp
, char *fmt
, ...)
691 vfprintf(stderr
, fmt
, ap
);
697 cmn_err(int level
, char *fmt
, ...)
702 vfprintf(stderr
, fmt
, ap
);
708 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
709 * values, and omit the stack trace unless the error level is tuned high.
715 xfs_failaddr_t failaddr
)
717 xfs_buf_ioerror(bp
, error
);
719 xfs_alert(NULL
, "Metadata %s detected at %p, %s block 0x%llx/0x%x",
720 bp
->b_error
== -EFSBADCRC
? "CRC error" : "corruption",
721 failaddr
? failaddr
: __return_address
,
722 bp
->b_ops
->name
, bp
->b_bn
, BBTOB(bp
->b_length
));
726 * Warnings for inode corruption problems. Don't bother with the stack
727 * trace unless the error level is turned up high.
730 xfs_inode_verifier_error(
731 struct xfs_inode
*ip
,
736 xfs_failaddr_t failaddr
)
738 xfs_alert(NULL
, "Metadata %s detected at %p, inode 0x%llx %s",
739 error
== -EFSBADCRC
? "CRC error" : "corruption",
740 failaddr
? failaddr
: __return_address
,
745 * This is called from I/O verifiers on v5 superblock filesystems. In the
746 * kernel, it validates the metadata LSN parameter against the current LSN of
747 * the active log. We don't have an active log in userspace so this kind of
748 * validation is not required. Therefore, this function always returns true in
751 * xfs_repair piggybacks off this mechanism to help track the largest metadata
752 * LSN in use on a filesystem. Keep a record of the largest LSN seen such that
753 * repair can validate it against the state of the log.
755 xfs_lsn_t libxfs_max_lsn
= 0;
756 pthread_mutex_t libxfs_max_lsn_lock
= PTHREAD_MUTEX_INITIALIZER
;
760 struct xfs_mount
*mp
,
763 int cycle
= CYCLE_LSN(lsn
);
764 int block
= BLOCK_LSN(lsn
);
768 if (lsn
== NULLCOMMITLSN
)
771 pthread_mutex_lock(&libxfs_max_lsn_lock
);
773 max_cycle
= CYCLE_LSN(libxfs_max_lsn
);
774 max_block
= BLOCK_LSN(libxfs_max_lsn
);
776 if ((cycle
> max_cycle
) ||
777 (cycle
== max_cycle
&& block
> max_block
))
778 libxfs_max_lsn
= lsn
;
780 pthread_mutex_unlock(&libxfs_max_lsn_lock
);
785 static struct xfs_buftarg
*
786 xfs_find_bdev_for_inode(
787 struct xfs_inode
*ip
)
789 struct xfs_mount
*mp
= ip
->i_mount
;
791 if (XFS_IS_REALTIME_INODE(ip
))
792 return mp
->m_rtdev_targp
;
793 return mp
->m_ddev_targp
;
797 xfs_fsb_to_db(struct xfs_inode
*ip
, xfs_fsblock_t fsb
)
799 if (XFS_IS_REALTIME_INODE(ip
))
800 return XFS_FSB_TO_BB(ip
->i_mount
, fsb
);
801 return XFS_FSB_TO_DADDR(ip
->i_mount
, (fsb
));
806 struct xfs_inode
*ip
,
807 xfs_fsblock_t start_fsb
,
810 xfs_daddr_t sector
= xfs_fsb_to_db(ip
, start_fsb
);
811 ssize_t size
= XFS_FSB_TO_BB(ip
->i_mount
, count_fsb
);
813 return libxfs_device_zero(xfs_find_bdev_for_inode(ip
), sector
, size
);
817 hweight8(unsigned int w
)
819 unsigned int res
= w
- ((w
>> 1) & 0x55);
820 res
= (res
& 0x33) + ((res
>> 2) & 0x33);
821 return (res
+ (res
>> 4)) & 0x0F;
825 hweight32(unsigned int w
)
827 unsigned int res
= w
- ((w
>> 1) & 0x55555555);
828 res
= (res
& 0x33333333) + ((res
>> 2) & 0x33333333);
829 res
= (res
+ (res
>> 4)) & 0x0F0F0F0F;
830 res
= res
+ (res
>> 8);
831 return (res
+ (res
>> 16)) & 0x000000FF;
837 return hweight32((unsigned int)w
) +
838 hweight32((unsigned int)(w
>> 32));