fs/xfs/xfs_inode

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This source file includes following definitions.
INODE_ITEM
xfs_inode_item_data_fork_size
xfs_inode_item_attr_fork_size
xfs_inode_item_size
xfs_inode_item_format_data_fork
xfs_inode_item_format_attr_fork
xfs_inode_to_log_dinode
xfs_inode_item_format_core
xfs_inode_item_format
xfs_inode_item_pin
xfs_inode_item_unpin
xfs_inode_item_error
xfs_inode_item_push
xfs_inode_item_release
xfs_inode_item_committed
xfs_inode_item_committing
xfs_inode_item_init
xfs_inode_item_destroy
xfs_iflush_done
xfs_iflush_abort
xfs_istale_done
xfs_inode_item_format_convert
   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 
  21 #include <linux/iversion.h>
  22 
  23 kmem_zone_t     *xfs_ili_zone;          /* inode log item zone */
  24 
  25 static inline struct xfs_inode_log_item *INODE_ITEM(struct xfs_log_item *lip)
  26 {
  27         return container_of(lip, struct xfs_inode_log_item, ili_item);
  28 }
  29 
  30 STATIC void
  31 xfs_inode_item_data_fork_size(
  32         struct xfs_inode_log_item *iip,
  33         int                     *nvecs,
  34         int                     *nbytes)
  35 {
  36         struct xfs_inode        *ip = iip->ili_inode;
  37 
  38         switch (ip->i_d.di_format) {
  39         case XFS_DINODE_FMT_EXTENTS:
  40                 if ((iip->ili_fields & XFS_ILOG_DEXT) &&
  41                     ip->i_d.di_nextents > 0 &&
  42                     ip->i_df.if_bytes > 0) {
  43                         /* worst case, doesn't subtract delalloc extents */
  44                         *nbytes += XFS_IFORK_DSIZE(ip);
  45                         *nvecs += 1;
  46                 }
  47                 break;
  48         case XFS_DINODE_FMT_BTREE:
  49                 if ((iip->ili_fields & XFS_ILOG_DBROOT) &&
  50                     ip->i_df.if_broot_bytes > 0) {
  51                         *nbytes += ip->i_df.if_broot_bytes;
  52                         *nvecs += 1;
  53                 }
  54                 break;
  55         case XFS_DINODE_FMT_LOCAL:
  56                 if ((iip->ili_fields & XFS_ILOG_DDATA) &&
  57                     ip->i_df.if_bytes > 0) {
  58                         *nbytes += roundup(ip->i_df.if_bytes, 4);
  59                         *nvecs += 1;
  60                 }
  61                 break;
  62 
  63         case XFS_DINODE_FMT_DEV:
  64                 break;
  65         default:
  66                 ASSERT(0);
  67                 break;
  68         }
  69 }
  70 
  71 STATIC void
  72 xfs_inode_item_attr_fork_size(
  73         struct xfs_inode_log_item *iip,
  74         int                     *nvecs,
  75         int                     *nbytes)
  76 {
  77         struct xfs_inode        *ip = iip->ili_inode;
  78 
  79         switch (ip->i_d.di_aformat) {
  80         case XFS_DINODE_FMT_EXTENTS:
  81                 if ((iip->ili_fields & XFS_ILOG_AEXT) &&
  82                     ip->i_d.di_anextents > 0 &&
  83                     ip->i_afp->if_bytes > 0) {
  84                         /* worst case, doesn't subtract unused space */
  85                         *nbytes += XFS_IFORK_ASIZE(ip);
  86                         *nvecs += 1;
  87                 }
  88                 break;
  89         case XFS_DINODE_FMT_BTREE:
  90                 if ((iip->ili_fields & XFS_ILOG_ABROOT) &&
  91                     ip->i_afp->if_broot_bytes > 0) {
  92                         *nbytes += ip->i_afp->if_broot_bytes;
  93                         *nvecs += 1;
  94                 }
  95                 break;
  96         case XFS_DINODE_FMT_LOCAL:
  97                 if ((iip->ili_fields & XFS_ILOG_ADATA) &&
  98                     ip->i_afp->if_bytes > 0) {
  99                         *nbytes += roundup(ip->i_afp->if_bytes, 4);
 100                         *nvecs += 1;
 101                 }
 102                 break;
 103         default:
 104                 ASSERT(0);
 105                 break;
 106         }
 107 }
 108 
 109 /*
 110  * This returns the number of iovecs needed to log the given inode item.
 111  *
 112  * We need one iovec for the inode log format structure, one for the
 113  * inode core, and possibly one for the inode data/extents/b-tree root
 114  * and one for the inode attribute data/extents/b-tree root.
 115  */
 116 STATIC void
 117 xfs_inode_item_size(
 118         struct xfs_log_item     *lip,
 119         int                     *nvecs,
 120         int                     *nbytes)
 121 {
 122         struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 123         struct xfs_inode        *ip = iip->ili_inode;
 124 
 125         *nvecs += 2;
 126         *nbytes += sizeof(struct xfs_inode_log_format) +
 127                    xfs_log_dinode_size(ip->i_d.di_version);
 128 
 129         xfs_inode_item_data_fork_size(iip, nvecs, nbytes);
 130         if (XFS_IFORK_Q(ip))
 131                 xfs_inode_item_attr_fork_size(iip, nvecs, nbytes);
 132 }
 133 
 134 STATIC void
 135 xfs_inode_item_format_data_fork(
 136         struct xfs_inode_log_item *iip,
 137         struct xfs_inode_log_format *ilf,
 138         struct xfs_log_vec      *lv,
 139         struct xfs_log_iovec    **vecp)
 140 {
 141         struct xfs_inode        *ip = iip->ili_inode;
 142         size_t                  data_bytes;
 143 
 144         switch (ip->i_d.di_format) {
 145         case XFS_DINODE_FMT_EXTENTS:
 146                 iip->ili_fields &=
 147                         ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | XFS_ILOG_DEV);
 148 
 149                 if ((iip->ili_fields & XFS_ILOG_DEXT) &&
 150                     ip->i_d.di_nextents > 0 &&
 151                     ip->i_df.if_bytes > 0) {
 152                         struct xfs_bmbt_rec *p;
 153 
 154                         ASSERT(xfs_iext_count(&ip->i_df) > 0);
 155 
 156                         p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IEXT);
 157                         data_bytes = xfs_iextents_copy(ip, p, XFS_DATA_FORK);
 158                         xlog_finish_iovec(lv, *vecp, data_bytes);
 159 
 160                         ASSERT(data_bytes <= ip->i_df.if_bytes);
 161 
 162                         ilf->ilf_dsize = data_bytes;
 163                         ilf->ilf_size++;
 164                 } else {
 165                         iip->ili_fields &= ~XFS_ILOG_DEXT;
 166                 }
 167                 break;
 168         case XFS_DINODE_FMT_BTREE:
 169                 iip->ili_fields &=
 170                         ~(XFS_ILOG_DDATA | XFS_ILOG_DEXT | XFS_ILOG_DEV);
 171 
 172                 if ((iip->ili_fields & XFS_ILOG_DBROOT) &&
 173                     ip->i_df.if_broot_bytes > 0) {
 174                         ASSERT(ip->i_df.if_broot != NULL);
 175                         xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IBROOT,
 176                                         ip->i_df.if_broot,
 177                                         ip->i_df.if_broot_bytes);
 178                         ilf->ilf_dsize = ip->i_df.if_broot_bytes;
 179                         ilf->ilf_size++;
 180                 } else {
 181                         ASSERT(!(iip->ili_fields &
 182                                  XFS_ILOG_DBROOT));
 183                         iip->ili_fields &= ~XFS_ILOG_DBROOT;
 184                 }
 185                 break;
 186         case XFS_DINODE_FMT_LOCAL:
 187                 iip->ili_fields &=
 188                         ~(XFS_ILOG_DEXT | XFS_ILOG_DBROOT | XFS_ILOG_DEV);
 189                 if ((iip->ili_fields & XFS_ILOG_DDATA) &&
 190                     ip->i_df.if_bytes > 0) {
 191                         /*
 192                          * Round i_bytes up to a word boundary.
 193                          * The underlying memory is guaranteed to
 194                          * to be there by xfs_idata_realloc().
 195                          */
 196                         data_bytes = roundup(ip->i_df.if_bytes, 4);
 197                         ASSERT(ip->i_df.if_u1.if_data != NULL);
 198                         ASSERT(ip->i_d.di_size > 0);
 199                         xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_ILOCAL,
 200                                         ip->i_df.if_u1.if_data, data_bytes);
 201                         ilf->ilf_dsize = (unsigned)data_bytes;
 202                         ilf->ilf_size++;
 203                 } else {
 204                         iip->ili_fields &= ~XFS_ILOG_DDATA;
 205                 }
 206                 break;
 207         case XFS_DINODE_FMT_DEV:
 208                 iip->ili_fields &=
 209                         ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | XFS_ILOG_DEXT);
 210                 if (iip->ili_fields & XFS_ILOG_DEV)
 211                         ilf->ilf_u.ilfu_rdev = sysv_encode_dev(VFS_I(ip)->i_rdev);
 212                 break;
 213         default:
 214                 ASSERT(0);
 215                 break;
 216         }
 217 }
 218 
 219 STATIC void
 220 xfs_inode_item_format_attr_fork(
 221         struct xfs_inode_log_item *iip,
 222         struct xfs_inode_log_format *ilf,
 223         struct xfs_log_vec      *lv,
 224         struct xfs_log_iovec    **vecp)
 225 {
 226         struct xfs_inode        *ip = iip->ili_inode;
 227         size_t                  data_bytes;
 228 
 229         switch (ip->i_d.di_aformat) {
 230         case XFS_DINODE_FMT_EXTENTS:
 231                 iip->ili_fields &=
 232                         ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT);
 233 
 234                 if ((iip->ili_fields & XFS_ILOG_AEXT) &&
 235                     ip->i_d.di_anextents > 0 &&
 236                     ip->i_afp->if_bytes > 0) {
 237                         struct xfs_bmbt_rec *p;
 238 
 239                         ASSERT(xfs_iext_count(ip->i_afp) ==
 240                                 ip->i_d.di_anextents);
 241 
 242                         p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_EXT);
 243                         data_bytes = xfs_iextents_copy(ip, p, XFS_ATTR_FORK);
 244                         xlog_finish_iovec(lv, *vecp, data_bytes);
 245 
 246                         ilf->ilf_asize = data_bytes;
 247                         ilf->ilf_size++;
 248                 } else {
 249                         iip->ili_fields &= ~XFS_ILOG_AEXT;
 250                 }
 251                 break;
 252         case XFS_DINODE_FMT_BTREE:
 253                 iip->ili_fields &=
 254                         ~(XFS_ILOG_ADATA | XFS_ILOG_AEXT);
 255 
 256                 if ((iip->ili_fields & XFS_ILOG_ABROOT) &&
 257                     ip->i_afp->if_broot_bytes > 0) {
 258                         ASSERT(ip->i_afp->if_broot != NULL);
 259 
 260                         xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_BROOT,
 261                                         ip->i_afp->if_broot,
 262                                         ip->i_afp->if_broot_bytes);
 263                         ilf->ilf_asize = ip->i_afp->if_broot_bytes;
 264                         ilf->ilf_size++;
 265                 } else {
 266                         iip->ili_fields &= ~XFS_ILOG_ABROOT;
 267                 }
 268                 break;
 269         case XFS_DINODE_FMT_LOCAL:
 270                 iip->ili_fields &=
 271                         ~(XFS_ILOG_AEXT | XFS_ILOG_ABROOT);
 272 
 273                 if ((iip->ili_fields & XFS_ILOG_ADATA) &&
 274                     ip->i_afp->if_bytes > 0) {
 275                         /*
 276                          * Round i_bytes up to a word boundary.
 277                          * The underlying memory is guaranteed to
 278                          * to be there by xfs_idata_realloc().
 279                          */
 280                         data_bytes = roundup(ip->i_afp->if_bytes, 4);
 281                         ASSERT(ip->i_afp->if_u1.if_data != NULL);
 282                         xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_LOCAL,
 283                                         ip->i_afp->if_u1.if_data,
 284                                         data_bytes);
 285                         ilf->ilf_asize = (unsigned)data_bytes;
 286                         ilf->ilf_size++;
 287                 } else {
 288                         iip->ili_fields &= ~XFS_ILOG_ADATA;
 289                 }
 290                 break;
 291         default:
 292                 ASSERT(0);
 293                 break;
 294         }
 295 }
 296 
 297 static void
 298 xfs_inode_to_log_dinode(
 299         struct xfs_inode        *ip,
 300         struct xfs_log_dinode   *to,
 301         xfs_lsn_t               lsn)
 302 {
 303         struct xfs_icdinode     *from = &ip->i_d;
 304         struct inode            *inode = VFS_I(ip);
 305 
 306         to->di_magic = XFS_DINODE_MAGIC;
 307 
 308         to->di_version = from->di_version;
 309         to->di_format = from->di_format;
 310         to->di_uid = from->di_uid;
 311         to->di_gid = from->di_gid;
 312         to->di_projid_lo = from->di_projid_lo;
 313         to->di_projid_hi = from->di_projid_hi;
 314 
 315         memset(to->di_pad, 0, sizeof(to->di_pad));
 316         memset(to->di_pad3, 0, sizeof(to->di_pad3));
 317         to->di_atime.t_sec = inode->i_atime.tv_sec;
 318         to->di_atime.t_nsec = inode->i_atime.tv_nsec;
 319         to->di_mtime.t_sec = inode->i_mtime.tv_sec;
 320         to->di_mtime.t_nsec = inode->i_mtime.tv_nsec;
 321         to->di_ctime.t_sec = inode->i_ctime.tv_sec;
 322         to->di_ctime.t_nsec = inode->i_ctime.tv_nsec;
 323         to->di_nlink = inode->i_nlink;
 324         to->di_gen = inode->i_generation;
 325         to->di_mode = inode->i_mode;
 326 
 327         to->di_size = from->di_size;
 328         to->di_nblocks = from->di_nblocks;
 329         to->di_extsize = from->di_extsize;
 330         to->di_nextents = from->di_nextents;
 331         to->di_anextents = from->di_anextents;
 332         to->di_forkoff = from->di_forkoff;
 333         to->di_aformat = from->di_aformat;
 334         to->di_dmevmask = from->di_dmevmask;
 335         to->di_dmstate = from->di_dmstate;
 336         to->di_flags = from->di_flags;
 337 
 338         /* log a dummy value to ensure log structure is fully initialised */
 339         to->di_next_unlinked = NULLAGINO;
 340 
 341         if (from->di_version == 3) {
 342                 to->di_changecount = inode_peek_iversion(inode);
 343                 to->di_crtime.t_sec = from->di_crtime.t_sec;
 344                 to->di_crtime.t_nsec = from->di_crtime.t_nsec;
 345                 to->di_flags2 = from->di_flags2;
 346                 to->di_cowextsize = from->di_cowextsize;
 347                 to->di_ino = ip->i_ino;
 348                 to->di_lsn = lsn;
 349                 memset(to->di_pad2, 0, sizeof(to->di_pad2));
 350                 uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid);
 351                 to->di_flushiter = 0;
 352         } else {
 353                 to->di_flushiter = from->di_flushiter;
 354         }
 355 }
 356 
 357 /*
 358  * Format the inode core. Current timestamp data is only in the VFS inode
 359  * fields, so we need to grab them from there. Hence rather than just copying
 360  * the XFS inode core structure, format the fields directly into the iovec.
 361  */
 362 static void
 363 xfs_inode_item_format_core(
 364         struct xfs_inode        *ip,
 365         struct xfs_log_vec      *lv,
 366         struct xfs_log_iovec    **vecp)
 367 {
 368         struct xfs_log_dinode   *dic;
 369 
 370         dic = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_ICORE);
 371         xfs_inode_to_log_dinode(ip, dic, ip->i_itemp->ili_item.li_lsn);
 372         xlog_finish_iovec(lv, *vecp, xfs_log_dinode_size(ip->i_d.di_version));
 373 }
 374 
 375 /*
 376  * This is called to fill in the vector of log iovecs for the given inode
 377  * log item.  It fills the first item with an inode log format structure,
 378  * the second with the on-disk inode structure, and a possible third and/or
 379  * fourth with the inode data/extents/b-tree root and inode attributes
 380  * data/extents/b-tree root.
 381  *
 382  * Note: Always use the 64 bit inode log format structure so we don't
 383  * leave an uninitialised hole in the format item on 64 bit systems. Log
 384  * recovery on 32 bit systems handles this just fine, so there's no reason
 385  * for not using an initialising the properly padded structure all the time.
 386  */
 387 STATIC void
 388 xfs_inode_item_format(
 389         struct xfs_log_item     *lip,
 390         struct xfs_log_vec      *lv)
 391 {
 392         struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 393         struct xfs_inode        *ip = iip->ili_inode;
 394         struct xfs_log_iovec    *vecp = NULL;
 395         struct xfs_inode_log_format *ilf;
 396 
 397         ASSERT(ip->i_d.di_version > 1);
 398 
 399         ilf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_IFORMAT);
 400         ilf->ilf_type = XFS_LI_INODE;
 401         ilf->ilf_ino = ip->i_ino;
 402         ilf->ilf_blkno = ip->i_imap.im_blkno;
 403         ilf->ilf_len = ip->i_imap.im_len;
 404         ilf->ilf_boffset = ip->i_imap.im_boffset;
 405         ilf->ilf_fields = XFS_ILOG_CORE;
 406         ilf->ilf_size = 2; /* format + core */
 407 
 408         /*
 409          * make sure we don't leak uninitialised data into the log in the case
 410          * when we don't log every field in the inode.
 411          */
 412         ilf->ilf_dsize = 0;
 413         ilf->ilf_asize = 0;
 414         ilf->ilf_pad = 0;
 415         memset(&ilf->ilf_u, 0, sizeof(ilf->ilf_u));
 416 
 417         xlog_finish_iovec(lv, vecp, sizeof(*ilf));
 418 
 419         xfs_inode_item_format_core(ip, lv, &vecp);
 420         xfs_inode_item_format_data_fork(iip, ilf, lv, &vecp);
 421         if (XFS_IFORK_Q(ip)) {
 422                 xfs_inode_item_format_attr_fork(iip, ilf, lv, &vecp);
 423         } else {
 424                 iip->ili_fields &=
 425                         ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT);
 426         }
 427 
 428         /* update the format with the exact fields we actually logged */
 429         ilf->ilf_fields |= (iip->ili_fields & ~XFS_ILOG_TIMESTAMP);
 430 }
 431 
 432 /*
 433  * This is called to pin the inode associated with the inode log
 434  * item in memory so it cannot be written out.
 435  */
 436 STATIC void
 437 xfs_inode_item_pin(
 438         struct xfs_log_item     *lip)
 439 {
 440         struct xfs_inode        *ip = INODE_ITEM(lip)->ili_inode;
 441 
 442         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 443 
 444         trace_xfs_inode_pin(ip, _RET_IP_);
 445         atomic_inc(&ip->i_pincount);
 446 }
 447 
 448 
 449 /*
 450  * This is called to unpin the inode associated with the inode log
 451  * item which was previously pinned with a call to xfs_inode_item_pin().
 452  *
 453  * Also wake up anyone in xfs_iunpin_wait() if the count goes to 0.
 454  */
 455 STATIC void
 456 xfs_inode_item_unpin(
 457         struct xfs_log_item     *lip,
 458         int                     remove)
 459 {
 460         struct xfs_inode        *ip = INODE_ITEM(lip)->ili_inode;
 461 
 462         trace_xfs_inode_unpin(ip, _RET_IP_);
 463         ASSERT(atomic_read(&ip->i_pincount) > 0);
 464         if (atomic_dec_and_test(&ip->i_pincount))
 465                 wake_up_bit(&ip->i_flags, __XFS_IPINNED_BIT);
 466 }
 467 
 468 /*
 469  * Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
 470  * have been failed during writeback
 471  *
 472  * This informs the AIL that the inode is already flush locked on the next push,
 473  * and acquires a hold on the buffer to ensure that it isn't reclaimed before
 474  * dirty data makes it to disk.
 475  */
 476 STATIC void
 477 xfs_inode_item_error(
 478         struct xfs_log_item     *lip,
 479         struct xfs_buf          *bp)
 480 {
 481         ASSERT(xfs_isiflocked(INODE_ITEM(lip)->ili_inode));
 482         xfs_set_li_failed(lip, bp);
 483 }
 484 
 485 STATIC uint
 486 xfs_inode_item_push(
 487         struct xfs_log_item     *lip,
 488         struct list_head        *buffer_list)
 489                 __releases(&lip->li_ailp->ail_lock)
 490                 __acquires(&lip->li_ailp->ail_lock)
 491 {
 492         struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 493         struct xfs_inode        *ip = iip->ili_inode;
 494         struct xfs_buf          *bp = lip->li_buf;
 495         uint                    rval = XFS_ITEM_SUCCESS;
 496         int                     error;
 497 
 498         if (xfs_ipincount(ip) > 0)
 499                 return XFS_ITEM_PINNED;
 500 
 501         /*
 502          * The buffer containing this item failed to be written back
 503          * previously. Resubmit the buffer for IO.
 504          */
 505         if (test_bit(XFS_LI_FAILED, &lip->li_flags)) {
 506                 if (!xfs_buf_trylock(bp))
 507                         return XFS_ITEM_LOCKED;
 508 
 509                 if (!xfs_buf_resubmit_failed_buffers(bp, buffer_list))
 510                         rval = XFS_ITEM_FLUSHING;
 511 
 512                 xfs_buf_unlock(bp);
 513                 return rval;
 514         }
 515 
 516         if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
 517                 return XFS_ITEM_LOCKED;
 518 
 519         /*
 520          * Re-check the pincount now that we stabilized the value by
 521          * taking the ilock.
 522          */
 523         if (xfs_ipincount(ip) > 0) {
 524                 rval = XFS_ITEM_PINNED;
 525                 goto out_unlock;
 526         }
 527 
 528         /*
 529          * Stale inode items should force out the iclog.
 530          */
 531         if (ip->i_flags & XFS_ISTALE) {
 532                 rval = XFS_ITEM_PINNED;
 533                 goto out_unlock;
 534         }
 535 
 536         /*
 537          * Someone else is already flushing the inode.  Nothing we can do
 538          * here but wait for the flush to finish and remove the item from
 539          * the AIL.
 540          */
 541         if (!xfs_iflock_nowait(ip)) {
 542                 rval = XFS_ITEM_FLUSHING;
 543                 goto out_unlock;
 544         }
 545 
 546         ASSERT(iip->ili_fields != 0 || XFS_FORCED_SHUTDOWN(ip->i_mount));
 547         ASSERT(iip->ili_logged == 0 || XFS_FORCED_SHUTDOWN(ip->i_mount));
 548 
 549         spin_unlock(&lip->li_ailp->ail_lock);
 550 
 551         error = xfs_iflush(ip, &bp);
 552         if (!error) {
 553                 if (!xfs_buf_delwri_queue(bp, buffer_list))
 554                         rval = XFS_ITEM_FLUSHING;
 555                 xfs_buf_relse(bp);
 556         }
 557 
 558         spin_lock(&lip->li_ailp->ail_lock);
 559 out_unlock:
 560         xfs_iunlock(ip, XFS_ILOCK_SHARED);
 561         return rval;
 562 }
 563 
 564 /*
 565  * Unlock the inode associated with the inode log item.
 566  */
 567 STATIC void
 568 xfs_inode_item_release(
 569         struct xfs_log_item     *lip)
 570 {
 571         struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 572         struct xfs_inode        *ip = iip->ili_inode;
 573         unsigned short          lock_flags;
 574 
 575         ASSERT(ip->i_itemp != NULL);
 576         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 577 
 578         lock_flags = iip->ili_lock_flags;
 579         iip->ili_lock_flags = 0;
 580         if (lock_flags)
 581                 xfs_iunlock(ip, lock_flags);
 582 }
 583 
 584 /*
 585  * This is called to find out where the oldest active copy of the inode log
 586  * item in the on disk log resides now that the last log write of it completed
 587  * at the given lsn.  Since we always re-log all dirty data in an inode, the
 588  * latest copy in the on disk log is the only one that matters.  Therefore,
 589  * simply return the given lsn.
 590  *
 591  * If the inode has been marked stale because the cluster is being freed, we
 592  * don't want to (re-)insert this inode into the AIL. There is a race condition
 593  * where the cluster buffer may be unpinned before the inode is inserted into
 594  * the AIL during transaction committed processing. If the buffer is unpinned
 595  * before the inode item has been committed and inserted, then it is possible
 596  * for the buffer to be written and IO completes before the inode is inserted
 597  * into the AIL. In that case, we'd be inserting a clean, stale inode into the
 598  * AIL which will never get removed. It will, however, get reclaimed which
 599  * triggers an assert in xfs_inode_free() complaining about freein an inode
 600  * still in the AIL.
 601  *
 602  * To avoid this, just unpin the inode directly and return a LSN of -1 so the
 603  * transaction committed code knows that it does not need to do any further
 604  * processing on the item.
 605  */
 606 STATIC xfs_lsn_t
 607 xfs_inode_item_committed(
 608         struct xfs_log_item     *lip,
 609         xfs_lsn_t               lsn)
 610 {
 611         struct xfs_inode_log_item *iip = INODE_ITEM(lip);
 612         struct xfs_inode        *ip = iip->ili_inode;
 613 
 614         if (xfs_iflags_test(ip, XFS_ISTALE)) {
 615                 xfs_inode_item_unpin(lip, 0);
 616                 return -1;
 617         }
 618         return lsn;
 619 }
 620 
 621 STATIC void
 622 xfs_inode_item_committing(
 623         struct xfs_log_item     *lip,
 624         xfs_lsn_t               commit_lsn)
 625 {
 626         INODE_ITEM(lip)->ili_last_lsn = commit_lsn;
 627         return xfs_inode_item_release(lip);
 628 }
 629 
 630 static const struct xfs_item_ops xfs_inode_item_ops = {
 631         .iop_size       = xfs_inode_item_size,
 632         .iop_format     = xfs_inode_item_format,
 633         .iop_pin        = xfs_inode_item_pin,
 634         .iop_unpin      = xfs_inode_item_unpin,
 635         .iop_release    = xfs_inode_item_release,
 636         .iop_committed  = xfs_inode_item_committed,
 637         .iop_push       = xfs_inode_item_push,
 638         .iop_committing = xfs_inode_item_committing,
 639         .iop_error      = xfs_inode_item_error
 640 };
 641 
 642 
 643 /*
 644  * Initialize the inode log item for a newly allocated (in-core) inode.
 645  */
 646 void
 647 xfs_inode_item_init(
 648         struct xfs_inode        *ip,
 649         struct xfs_mount        *mp)
 650 {
 651         struct xfs_inode_log_item *iip;
 652 
 653         ASSERT(ip->i_itemp == NULL);
 654         iip = ip->i_itemp = kmem_zone_zalloc(xfs_ili_zone, 0);
 655 
 656         iip->ili_inode = ip;
 657         xfs_log_item_init(mp, &iip->ili_item, XFS_LI_INODE,
 658                                                 &xfs_inode_item_ops);
 659 }
 660 
 661 /*
 662  * Free the inode log item and any memory hanging off of it.
 663  */
 664 void
 665 xfs_inode_item_destroy(
 666         xfs_inode_t     *ip)
 667 {
 668         kmem_free(ip->i_itemp->ili_item.li_lv_shadow);
 669         kmem_zone_free(xfs_ili_zone, ip->i_itemp);
 670 }
 671 
 672 
 673 /*
 674  * This is the inode flushing I/O completion routine.  It is called
 675  * from interrupt level when the buffer containing the inode is
 676  * flushed to disk.  It is responsible for removing the inode item
 677  * from the AIL if it has not been re-logged, and unlocking the inode's
 678  * flush lock.
 679  *
 680  * To reduce AIL lock traffic as much as possible, we scan the buffer log item
 681  * list for other inodes that will run this function. We remove them from the
 682  * buffer list so we can process all the inode IO completions in one AIL lock
 683  * traversal.
 684  */
 685 void
 686 xfs_iflush_done(
 687         struct xfs_buf          *bp,
 688         struct xfs_log_item     *lip)
 689 {
 690         struct xfs_inode_log_item *iip;
 691         struct xfs_log_item     *blip, *n;
 692         struct xfs_ail          *ailp = lip->li_ailp;
 693         int                     need_ail = 0;
 694         LIST_HEAD(tmp);
 695 
 696         /*
 697          * Scan the buffer IO completions for other inodes being completed and
 698          * attach them to the current inode log item.
 699          */
 700 
 701         list_add_tail(&lip->li_bio_list, &tmp);
 702 
 703         list_for_each_entry_safe(blip, n, &bp->b_li_list, li_bio_list) {
 704                 if (lip->li_cb != xfs_iflush_done)
 705                         continue;
 706 
 707                 list_move_tail(&blip->li_bio_list, &tmp);
 708                 /*
 709                  * while we have the item, do the unlocked check for needing
 710                  * the AIL lock.
 711                  */
 712                 iip = INODE_ITEM(blip);
 713                 if ((iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn) ||
 714                     test_bit(XFS_LI_FAILED, &blip->li_flags))
 715                         need_ail++;
 716         }
 717 
 718         /* make sure we capture the state of the initial inode. */
 719         iip = INODE_ITEM(lip);
 720         if ((iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) ||
 721             test_bit(XFS_LI_FAILED, &lip->li_flags))
 722                 need_ail++;
 723 
 724         /*
 725          * We only want to pull the item from the AIL if it is
 726          * actually there and its location in the log has not
 727          * changed since we started the flush.  Thus, we only bother
 728          * if the ili_logged flag is set and the inode's lsn has not
 729          * changed.  First we check the lsn outside
 730          * the lock since it's cheaper, and then we recheck while
 731          * holding the lock before removing the inode from the AIL.
 732          */
 733         if (need_ail) {
 734                 bool                    mlip_changed = false;
 735 
 736                 /* this is an opencoded batch version of xfs_trans_ail_delete */
 737                 spin_lock(&ailp->ail_lock);
 738                 list_for_each_entry(blip, &tmp, li_bio_list) {
 739                         if (INODE_ITEM(blip)->ili_logged &&
 740                             blip->li_lsn == INODE_ITEM(blip)->ili_flush_lsn)
 741                                 mlip_changed |= xfs_ail_delete_one(ailp, blip);
 742                         else {
 743                                 xfs_clear_li_failed(blip);
 744                         }
 745                 }
 746 
 747                 if (mlip_changed) {
 748                         if (!XFS_FORCED_SHUTDOWN(ailp->ail_mount))
 749                                 xlog_assign_tail_lsn_locked(ailp->ail_mount);
 750                         if (list_empty(&ailp->ail_head))
 751                                 wake_up_all(&ailp->ail_empty);
 752                 }
 753                 spin_unlock(&ailp->ail_lock);
 754 
 755                 if (mlip_changed)
 756                         xfs_log_space_wake(ailp->ail_mount);
 757         }
 758 
 759         /*
 760          * clean up and unlock the flush lock now we are done. We can clear the
 761          * ili_last_fields bits now that we know that the data corresponding to
 762          * them is safely on disk.
 763          */
 764         list_for_each_entry_safe(blip, n, &tmp, li_bio_list) {
 765                 list_del_init(&blip->li_bio_list);
 766                 iip = INODE_ITEM(blip);
 767                 iip->ili_logged = 0;
 768                 iip->ili_last_fields = 0;
 769                 xfs_ifunlock(iip->ili_inode);
 770         }
 771         list_del(&tmp);
 772 }
 773 
 774 /*
 775  * This is the inode flushing abort routine.  It is called from xfs_iflush when
 776  * the filesystem is shutting down to clean up the inode state.  It is
 777  * responsible for removing the inode item from the AIL if it has not been
 778  * re-logged, and unlocking the inode's flush lock.
 779  */
 780 void
 781 xfs_iflush_abort(
 782         xfs_inode_t             *ip,
 783         bool                    stale)
 784 {
 785         xfs_inode_log_item_t    *iip = ip->i_itemp;
 786 
 787         if (iip) {
 788                 if (test_bit(XFS_LI_IN_AIL, &iip->ili_item.li_flags)) {
 789                         xfs_trans_ail_remove(&iip->ili_item,
 790                                              stale ? SHUTDOWN_LOG_IO_ERROR :
 791                                                      SHUTDOWN_CORRUPT_INCORE);
 792                 }
 793                 iip->ili_logged = 0;
 794                 /*
 795                  * Clear the ili_last_fields bits now that we know that the
 796                  * data corresponding to them is safely on disk.
 797                  */
 798                 iip->ili_last_fields = 0;
 799                 /*
 800                  * Clear the inode logging fields so no more flushes are
 801                  * attempted.
 802                  */
 803                 iip->ili_fields = 0;
 804                 iip->ili_fsync_fields = 0;
 805         }
 806         /*
 807          * Release the inode's flush lock since we're done with it.
 808          */
 809         xfs_ifunlock(ip);
 810 }
 811 
 812 void
 813 xfs_istale_done(
 814         struct xfs_buf          *bp,
 815         struct xfs_log_item     *lip)
 816 {
 817         xfs_iflush_abort(INODE_ITEM(lip)->ili_inode, true);
 818 }
 819 
 820 /*
 821  * convert an xfs_inode_log_format struct from the old 32 bit version
 822  * (which can have different field alignments) to the native 64 bit version
 823  */
 824 int
 825 xfs_inode_item_format_convert(
 826         struct xfs_log_iovec            *buf,
 827         struct xfs_inode_log_format     *in_f)
 828 {
 829         struct xfs_inode_log_format_32  *in_f32 = buf->i_addr;
 830 
 831         if (buf->i_len != sizeof(*in_f32))
 832                 return -EFSCORRUPTED;
 833 
 834         in_f->ilf_type = in_f32->ilf_type;
 835         in_f->ilf_size = in_f32->ilf_size;
 836         in_f->ilf_fields = in_f32->ilf_fields;
 837         in_f->ilf_asize = in_f32->ilf_asize;
 838         in_f->ilf_dsize = in_f32->ilf_dsize;
 839         in_f->ilf_ino = in_f32->ilf_ino;
 840         memcpy(&in_f->ilf_u, &in_f32->ilf_u, sizeof(in_f->ilf_u));
 841         in_f->ilf_blkno = in_f32->ilf_blkno;
 842         in_f->ilf_len = in_f32->ilf_len;
 843         in_f->ilf_boffset = in_f32->ilf_boffset;
 844         return 0;
 845 }
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root/fs/xfs/xfs_inode_item.c

DEFINITIONS
