fs/xfs/xfs_inode_item.c

   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_types.h"
  21 #include "xfs_bit.h"
  22 #include "xfs_log.h"
  23 #include "xfs_inum.h"
  24 #include "xfs_trans.h"
  25 #include "xfs_buf_item.h"
  26 #include "xfs_sb.h"
  27 #include "xfs_ag.h"
  28 #include "xfs_dir2.h"
  29 #include "xfs_dmapi.h"
  30 #include "xfs_mount.h"
  31 #include "xfs_trans_priv.h"
  32 #include "xfs_bmap_btree.h"
  33 #include "xfs_alloc_btree.h"
  34 #include "xfs_ialloc_btree.h"
  35 #include "xfs_dir2_sf.h"
  36 #include "xfs_attr_sf.h"
  37 #include "xfs_dinode.h"
  38 #include "xfs_inode.h"
  39 #include "xfs_inode_item.h"
  40 #include "xfs_btree.h"
  41 #include "xfs_ialloc.h"
  42 #include "xfs_rw.h"
  43 #include "xfs_error.h"
  44
  45
  46 kmem_zone_t     *xfs_ili_zone;          /* inode log item zone */
  47
  48 /*
  49  * This returns the number of iovecs needed to log the given inode item.
  50  *
  51  * We need one iovec for the inode log format structure, one for the
  52  * inode core, and possibly one for the inode data/extents/b-tree root
  53  * and one for the inode attribute data/extents/b-tree root.
  54  */
  55 STATIC uint
  56 xfs_inode_item_size(
  57         xfs_inode_log_item_t    *iip)
  58 {
  59         uint            nvecs;
  60         xfs_inode_t     *ip;
  61
  62         ip = iip->ili_inode;
  63         nvecs = 2;
  64
  65         /*
  66          * Only log the data/extents/b-tree root if there is something
  67          * left to log.
  68          */
  69         iip->ili_format.ilf_fields |= XFS_ILOG_CORE;
  70
  71         switch (ip->i_d.di_format) {
  72         case XFS_DINODE_FMT_EXTENTS:
  73                 iip->ili_format.ilf_fields &=
  74                         ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
  75                           XFS_ILOG_DEV | XFS_ILOG_UUID);
  76                 if ((iip->ili_format.ilf_fields & XFS_ILOG_DEXT) &&
  77                     (ip->i_d.di_nextents > 0) &&
  78                     (ip->i_df.if_bytes > 0)) {
  79                         ASSERT(ip->i_df.if_u1.if_extents != NULL);
  80                         nvecs++;
  81                 } else {
  82                         iip->ili_format.ilf_fields &= ~XFS_ILOG_DEXT;
  83                 }
  84                 break;
  85
  86         case XFS_DINODE_FMT_BTREE:
  87                 ASSERT(ip->i_df.if_ext_max ==
  88                        XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
  89                 iip->ili_format.ilf_fields &=
  90                         ~(XFS_ILOG_DDATA | XFS_ILOG_DEXT |
  91                           XFS_ILOG_DEV | XFS_ILOG_UUID);
  92                 if ((iip->ili_format.ilf_fields & XFS_ILOG_DBROOT) &&
  93                     (ip->i_df.if_broot_bytes > 0)) {
  94                         ASSERT(ip->i_df.if_broot != NULL);
  95                         nvecs++;
  96                 } else {
  97                         ASSERT(!(iip->ili_format.ilf_fields &
  98                                  XFS_ILOG_DBROOT));
  99 #ifdef XFS_TRANS_DEBUG
 100                         if (iip->ili_root_size > 0) {
 101                                 ASSERT(iip->ili_root_size ==
 102                                        ip->i_df.if_broot_bytes);
 103                                 ASSERT(memcmp(iip->ili_orig_root,
 104                                             ip->i_df.if_broot,
 105                                             iip->ili_root_size) == 0);
 106                         } else {
 107                                 ASSERT(ip->i_df.if_broot_bytes == 0);
 108                         }
 109 #endif
 110                         iip->ili_format.ilf_fields &= ~XFS_ILOG_DBROOT;
 111                 }
 112                 break;
 113
 114         case XFS_DINODE_FMT_LOCAL:
 115                 iip->ili_format.ilf_fields &=
 116                         ~(XFS_ILOG_DEXT | XFS_ILOG_DBROOT |
 117                           XFS_ILOG_DEV | XFS_ILOG_UUID);
 118                 if ((iip->ili_format.ilf_fields & XFS_ILOG_DDATA) &&
 119                     (ip->i_df.if_bytes > 0)) {
 120                         ASSERT(ip->i_df.if_u1.if_data != NULL);
 121                         ASSERT(ip->i_d.di_size > 0);
 122                         nvecs++;
 123                 } else {
 124                         iip->ili_format.ilf_fields &= ~XFS_ILOG_DDATA;
 125                 }
 126                 break;
 127
 128         case XFS_DINODE_FMT_DEV:
 129                 iip->ili_format.ilf_fields &=
 130                         ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
 131                           XFS_ILOG_DEXT | XFS_ILOG_UUID);
 132                 break;
 133
 134         case XFS_DINODE_FMT_UUID:
 135                 iip->ili_format.ilf_fields &=
 136                         ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
 137                           XFS_ILOG_DEXT | XFS_ILOG_DEV);
 138                 break;
 139
 140         default:
 141                 ASSERT(0);
 142                 break;
 143         }
 144
 145         /*
 146          * If there are no attributes associated with this file,
 147          * then there cannot be anything more to log.
 148          * Clear all attribute-related log flags.
 149          */
 150         if (!XFS_IFORK_Q(ip)) {
 151                 iip->ili_format.ilf_fields &=
 152                         ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT);
 153                 return nvecs;
 154         }
 155
 156         /*
 157          * Log any necessary attribute data.
 158          */
 159         switch (ip->i_d.di_aformat) {
 160         case XFS_DINODE_FMT_EXTENTS:
 161                 iip->ili_format.ilf_fields &=
 162                         ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT);
 163                 if ((iip->ili_format.ilf_fields & XFS_ILOG_AEXT) &&
 164                     (ip->i_d.di_anextents > 0) &&
 165                     (ip->i_afp->if_bytes > 0)) {
 166                         ASSERT(ip->i_afp->if_u1.if_extents != NULL);
 167                         nvecs++;
 168                 } else {
 169                         iip->ili_format.ilf_fields &= ~XFS_ILOG_AEXT;
 170                 }
 171                 break;
 172
 173         case XFS_DINODE_FMT_BTREE:
 174                 iip->ili_format.ilf_fields &=
 175                         ~(XFS_ILOG_ADATA | XFS_ILOG_AEXT);
 176                 if ((iip->ili_format.ilf_fields & XFS_ILOG_ABROOT) &&
 177                     (ip->i_afp->if_broot_bytes > 0)) {
 178                         ASSERT(ip->i_afp->if_broot != NULL);
 179                         nvecs++;
 180                 } else {
 181                         iip->ili_format.ilf_fields &= ~XFS_ILOG_ABROOT;
 182                 }
 183                 break;
 184
 185         case XFS_DINODE_FMT_LOCAL:
 186                 iip->ili_format.ilf_fields &=
 187                         ~(XFS_ILOG_AEXT | XFS_ILOG_ABROOT);
 188                 if ((iip->ili_format.ilf_fields & XFS_ILOG_ADATA) &&
 189                     (ip->i_afp->if_bytes > 0)) {
 190                         ASSERT(ip->i_afp->if_u1.if_data != NULL);
 191                         nvecs++;
 192                 } else {
 193                         iip->ili_format.ilf_fields &= ~XFS_ILOG_ADATA;
 194                 }
 195                 break;
 196
 197         default:
 198                 ASSERT(0);
 199                 break;
 200         }
 201
 202         return nvecs;
 203 }
 204
 205 /*
 206  * This is called to fill in the vector of log iovecs for the
 207  * given inode log item.  It fills the first item with an inode
 208  * log format structure, the second with the on-disk inode structure,
 209  * and a possible third and/or fourth with the inode data/extents/b-tree
 210  * root and inode attributes data/extents/b-tree root.
 211  */
 212 STATIC void
 213 xfs_inode_item_format(
 214         xfs_inode_log_item_t    *iip,
 215         xfs_log_iovec_t         *log_vector)
 216 {
 217         uint                    nvecs;
 218         xfs_log_iovec_t         *vecp;
 219         xfs_inode_t             *ip;
 220         size_t                  data_bytes;
 221         xfs_bmbt_rec_t          *ext_buffer;
 222         int                     nrecs;
 223         xfs_mount_t             *mp;
 224
 225         ip = iip->ili_inode;
 226         vecp = log_vector;
 227
 228         vecp->i_addr = (xfs_caddr_t)&iip->ili_format;
 229         vecp->i_len  = sizeof(xfs_inode_log_format_t);
 230         XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IFORMAT);
 231         vecp++;
 232         nvecs        = 1;
 233
 234         /*
 235          * Clear i_update_core if the timestamps (or any other
 236          * non-transactional modification) need flushing/logging
 237          * and we're about to log them with the rest of the core.
 238          *
 239          * This is the same logic as xfs_iflush() but this code can't
 240          * run at the same time as xfs_iflush because we're in commit
 241          * processing here and so we have the inode lock held in
 242          * exclusive mode.  Although it doesn't really matter
 243          * for the timestamps if both routines were to grab the
 244          * timestamps or not.  That would be ok.
 245          *
 246          * We clear i_update_core before copying out the data.
 247          * This is for coordination with our timestamp updates
 248          * that don't hold the inode lock. They will always
 249          * update the timestamps BEFORE setting i_update_core,
 250          * so if we clear i_update_core after they set it we
 251          * are guaranteed to see their updates to the timestamps
 252          * either here.  Likewise, if they set it after we clear it
 253          * here, we'll see it either on the next commit of this
 254          * inode or the next time the inode gets flushed via
 255          * xfs_iflush().  This depends on strongly ordered memory
 256          * semantics, but we have that.  We use the SYNCHRONIZE
 257          * macro to make sure that the compiler does not reorder
 258          * the i_update_core access below the data copy below.
 259          */
 260         if (ip->i_update_core)  {
 261                 ip->i_update_core = 0;
 262                 SYNCHRONIZE();
 263         }
 264
 265         /*
 266          * Make sure to get the latest atime from the Linux inode.
 267          */
 268         xfs_synchronize_atime(ip);
 269
 270         /*
 271          * make sure the linux inode is dirty
 272          */
 273         xfs_mark_inode_dirty_sync(ip);
 274
 275         vecp->i_addr = (xfs_caddr_t)&ip->i_d;
 276         vecp->i_len  = sizeof(struct xfs_icdinode);
 277         XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_ICORE);
 278         vecp++;
 279         nvecs++;
 280         iip->ili_format.ilf_fields |= XFS_ILOG_CORE;
 281
 282         /*
 283          * If this is really an old format inode, then we need to
 284          * log it as such.  This means that we have to copy the link
 285          * count from the new field to the old.  We don't have to worry
 286          * about the new fields, because nothing trusts them as long as
 287          * the old inode version number is there.  If the superblock already
 288          * has a new version number, then we don't bother converting back.
 289          */
 290         mp = ip->i_mount;
 291         ASSERT(ip->i_d.di_version == 1 || xfs_sb_version_hasnlink(&mp->m_sb));
 292         if (ip->i_d.di_version == 1) {
 293                 if (!xfs_sb_version_hasnlink(&mp->m_sb)) {
 294                         /*
 295                          * Convert it back.
 296                          */
 297                         ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1);
 298                         ip->i_d.di_onlink = ip->i_d.di_nlink;
 299                 } else {
 300                         /*
 301                          * The superblock version has already been bumped,
 302                          * so just make the conversion to the new inode
 303                          * format permanent.
 304                          */
 305                         ip->i_d.di_version = 2;
 306                         ip->i_d.di_onlink = 0;
 307                         memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
 308                 }
 309         }
 310
 311         switch (ip->i_d.di_format) {
 312         case XFS_DINODE_FMT_EXTENTS:
 313                 ASSERT(!(iip->ili_format.ilf_fields &
 314                          (XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
 315                           XFS_ILOG_DEV | XFS_ILOG_UUID)));
 316                 if (iip->ili_format.ilf_fields & XFS_ILOG_DEXT) {
 317                         ASSERT(ip->i_df.if_bytes > 0);
 318                         ASSERT(ip->i_df.if_u1.if_extents != NULL);
 319                         ASSERT(ip->i_d.di_nextents > 0);
 320                         ASSERT(iip->ili_extents_buf == NULL);
 321                         nrecs = ip->i_df.if_bytes /
 322                                 (uint)sizeof(xfs_bmbt_rec_t);
 323                         ASSERT(nrecs > 0);
 324 #ifdef XFS_NATIVE_HOST
 325                         if (nrecs == ip->i_d.di_nextents) {
 326                                 /*
 327                                  * There are no delayed allocation
 328                                  * extents, so just point to the
 329                                  * real extents array.
 330                                  */
 331                                 vecp->i_addr =
 332                                         (char *)(ip->i_df.if_u1.if_extents);
 333                                 vecp->i_len = ip->i_df.if_bytes;
 334                                 XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IEXT);
 335                         } else
 336 #endif
 337                         {
 338                                 /*
 339                                  * There are delayed allocation extents
 340                                  * in the inode, or we need to convert
 341                                  * the extents to on disk format.
 342                                  * Use xfs_iextents_copy()
 343                                  * to copy only the real extents into
 344                                  * a separate buffer.  We'll free the
 345                                  * buffer in the unlock routine.
 346                                  */
 347                                 ext_buffer = kmem_alloc(ip->i_df.if_bytes,
 348                                         KM_SLEEP);
 349                                 iip->ili_extents_buf = ext_buffer;
 350                                 vecp->i_addr = (xfs_caddr_t)ext_buffer;
 351                                 vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
 352                                                 XFS_DATA_FORK);
 353                                 XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IEXT);
 354                         }
 355                         ASSERT(vecp->i_len <= ip->i_df.if_bytes);
 356                         iip->ili_format.ilf_dsize = vecp->i_len;
 357                         vecp++;
 358                         nvecs++;
 359                 }
 360                 break;
 361
 362         case XFS_DINODE_FMT_BTREE:
 363                 ASSERT(!(iip->ili_format.ilf_fields &
 364                          (XFS_ILOG_DDATA | XFS_ILOG_DEXT |
 365                           XFS_ILOG_DEV | XFS_ILOG_UUID)));
 366                 if (iip->ili_format.ilf_fields & XFS_ILOG_DBROOT) {
 367                         ASSERT(ip->i_df.if_broot_bytes > 0);
 368                         ASSERT(ip->i_df.if_broot != NULL);
 369                         vecp->i_addr = (xfs_caddr_t)ip->i_df.if_broot;
 370                         vecp->i_len = ip->i_df.if_broot_bytes;
 371                         XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IBROOT);
 372                         vecp++;
 373                         nvecs++;
 374                         iip->ili_format.ilf_dsize = ip->i_df.if_broot_bytes;
 375                 }
 376                 break;
 377
 378         case XFS_DINODE_FMT_LOCAL:
 379                 ASSERT(!(iip->ili_format.ilf_fields &
 380                          (XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
 381                           XFS_ILOG_DEV | XFS_ILOG_UUID)));
 382                 if (iip->ili_format.ilf_fields & XFS_ILOG_DDATA) {
 383                         ASSERT(ip->i_df.if_bytes > 0);
 384                         ASSERT(ip->i_df.if_u1.if_data != NULL);
 385                         ASSERT(ip->i_d.di_size > 0);
 386
 387                         vecp->i_addr = (xfs_caddr_t)ip->i_df.if_u1.if_data;
 388                         /*
 389                          * Round i_bytes up to a word boundary.
 390                          * The underlying memory is guaranteed to
 391                          * to be there by xfs_idata_realloc().
 392                          */
 393                         data_bytes = roundup(ip->i_df.if_bytes, 4);
 394                         ASSERT((ip->i_df.if_real_bytes == 0) ||
 395                                (ip->i_df.if_real_bytes == data_bytes));
 396                         vecp->i_len = (int)data_bytes;
 397                         XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_ILOCAL);
 398                         vecp++;
 399                         nvecs++;
 400                         iip->ili_format.ilf_dsize = (unsigned)data_bytes;
 401                 }
 402                 break;
 403
 404         case XFS_DINODE_FMT_DEV:
 405                 ASSERT(!(iip->ili_format.ilf_fields &
 406                          (XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
 407                           XFS_ILOG_DDATA | XFS_ILOG_UUID)));
 408                 if (iip->ili_format.ilf_fields & XFS_ILOG_DEV) {
 409                         iip->ili_format.ilf_u.ilfu_rdev =
 410                                 ip->i_df.if_u2.if_rdev;
 411                 }
 412                 break;
 413
 414         case XFS_DINODE_FMT_UUID:
 415                 ASSERT(!(iip->ili_format.ilf_fields &
 416                          (XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
 417                           XFS_ILOG_DDATA | XFS_ILOG_DEV)));
 418                 if (iip->ili_format.ilf_fields & XFS_ILOG_UUID) {
 419                         iip->ili_format.ilf_u.ilfu_uuid =
 420                                 ip->i_df.if_u2.if_uuid;
 421                 }
 422                 break;
 423
 424         default:
 425                 ASSERT(0);
 426                 break;
 427         }
 428
 429         /*
 430          * If there are no attributes associated with the file,
 431          * then we're done.
 432          * Assert that no attribute-related log flags are set.
 433          */
 434         if (!XFS_IFORK_Q(ip)) {
 435                 ASSERT(nvecs == iip->ili_item.li_desc->lid_size);
 436                 iip->ili_format.ilf_size = nvecs;
 437                 ASSERT(!(iip->ili_format.ilf_fields &
 438                          (XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT)));
 439                 return;
 440         }
 441
 442         switch (ip->i_d.di_aformat) {
 443         case XFS_DINODE_FMT_EXTENTS:
 444                 ASSERT(!(iip->ili_format.ilf_fields &
 445                          (XFS_ILOG_ADATA | XFS_ILOG_ABROOT)));
 446                 if (iip->ili_format.ilf_fields & XFS_ILOG_AEXT) {
 447                         ASSERT(ip->i_afp->if_bytes > 0);
 448                         ASSERT(ip->i_afp->if_u1.if_extents != NULL);
 449                         ASSERT(ip->i_d.di_anextents > 0);
 450 #ifdef DEBUG
 451                         nrecs = ip->i_afp->if_bytes /
 452                                 (uint)sizeof(xfs_bmbt_rec_t);
 453 #endif
 454                         ASSERT(nrecs > 0);
 455                         ASSERT(nrecs == ip->i_d.di_anextents);
 456 #ifdef XFS_NATIVE_HOST
 457                         /*
 458                          * There are not delayed allocation extents
 459                          * for attributes, so just point at the array.
 460                          */
 461                         vecp->i_addr = (char *)(ip->i_afp->if_u1.if_extents);
 462                         vecp->i_len = ip->i_afp->if_bytes;
 463 #else
 464                         ASSERT(iip->ili_aextents_buf == NULL);
 465                         /*
 466                          * Need to endian flip before logging
 467                          */
 468                         ext_buffer = kmem_alloc(ip->i_afp->if_bytes,
 469                                 KM_SLEEP);
 470                         iip->ili_aextents_buf = ext_buffer;
 471                         vecp->i_addr = (xfs_caddr_t)ext_buffer;
 472                         vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
 473                                         XFS_ATTR_FORK);
 474 #endif
 475                         XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IATTR_EXT);
 476                         iip->ili_format.ilf_asize = vecp->i_len;
 477                         vecp++;
 478                         nvecs++;
 479                 }
 480                 break;
 481
 482         case XFS_DINODE_FMT_BTREE:
 483                 ASSERT(!(iip->ili_format.ilf_fields &
 484                          (XFS_ILOG_ADATA | XFS_ILOG_AEXT)));
 485                 if (iip->ili_format.ilf_fields & XFS_ILOG_ABROOT) {
 486                         ASSERT(ip->i_afp->if_broot_bytes > 0);
 487                         ASSERT(ip->i_afp->if_broot != NULL);
 488                         vecp->i_addr = (xfs_caddr_t)ip->i_afp->if_broot;
 489                         vecp->i_len = ip->i_afp->if_broot_bytes;
 490                         XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IATTR_BROOT);
 491                         vecp++;
 492                         nvecs++;
 493                         iip->ili_format.ilf_asize = ip->i_afp->if_broot_bytes;
 494                 }
 495                 break;
 496
 497         case XFS_DINODE_FMT_LOCAL:
 498                 ASSERT(!(iip->ili_format.ilf_fields &
 499                          (XFS_ILOG_ABROOT | XFS_ILOG_AEXT)));
 500                 if (iip->ili_format.ilf_fields & XFS_ILOG_ADATA) {
 501                         ASSERT(ip->i_afp->if_bytes > 0);
 502                         ASSERT(ip->i_afp->if_u1.if_data != NULL);
 503
 504                         vecp->i_addr = (xfs_caddr_t)ip->i_afp->if_u1.if_data;
 505                         /*
 506                          * Round i_bytes up to a word boundary.
 507                          * The underlying memory is guaranteed to
 508                          * to be there by xfs_idata_realloc().
 509                          */
 510                         data_bytes = roundup(ip->i_afp->if_bytes, 4);
 511                         ASSERT((ip->i_afp->if_real_bytes == 0) ||
 512                                (ip->i_afp->if_real_bytes == data_bytes));
 513                         vecp->i_len = (int)data_bytes;
 514                         XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IATTR_LOCAL);
 515                         vecp++;
 516                         nvecs++;
 517                         iip->ili_format.ilf_asize = (unsigned)data_bytes;
 518                 }
 519                 break;
 520
 521         default:
 522                 ASSERT(0);
 523                 break;
 524         }
 525
 526         ASSERT(nvecs == iip->ili_item.li_desc->lid_size);
 527         iip->ili_format.ilf_size = nvecs;
 528 }
 529
 530
 531 /*
 532  * This is called to pin the inode associated with the inode log
 533  * item in memory so it cannot be written out.  Do this by calling
 534  * xfs_ipin() to bump the pin count in the inode while holding the
 535  * inode pin lock.
 536  */
 537 STATIC void
 538 xfs_inode_item_pin(
 539         xfs_inode_log_item_t    *iip)
 540 {
 541         ASSERT(xfs_isilocked(iip->ili_inode, XFS_ILOCK_EXCL));
 542         xfs_ipin(iip->ili_inode);
 543 }
 544
 545
 546 /*
 547  * This is called to unpin the inode associated with the inode log
 548  * item which was previously pinned with a call to xfs_inode_item_pin().
 549  * Just call xfs_iunpin() on the inode to do this.
 550  */
 551 /* ARGSUSED */
 552 STATIC void
 553 xfs_inode_item_unpin(
 554         xfs_inode_log_item_t    *iip,
 555         int                     stale)
 556 {
 557         xfs_iunpin(iip->ili_inode);
 558 }
 559
 560 /* ARGSUSED */
 561 STATIC void
 562 xfs_inode_item_unpin_remove(
 563         xfs_inode_log_item_t    *iip,
 564         xfs_trans_t             *tp)
 565 {
 566         xfs_iunpin(iip->ili_inode);
 567 }
 568
 569 /*
 570  * This is called to attempt to lock the inode associated with this
 571  * inode log item, in preparation for the push routine which does the actual
 572  * iflush.  Don't sleep on the inode lock or the flush lock.
 573  *
 574  * If the flush lock is already held, indicating that the inode has
 575  * been or is in the process of being flushed, then (ideally) we'd like to
 576  * see if the inode's buffer is still incore, and if so give it a nudge.
 577  * We delay doing so until the pushbuf routine, though, to avoid holding
 578  * the AIL lock across a call to the blackhole which is the buffer cache.
 579  * Also we don't want to sleep in any device strategy routines, which can happen
 580  * if we do the subsequent bawrite in here.
 581  */
 582 STATIC uint
 583 xfs_inode_item_trylock(
 584         xfs_inode_log_item_t    *iip)
 585 {
 586         register xfs_inode_t    *ip;
 587
 588         ip = iip->ili_inode;
 589
 590         if (xfs_ipincount(ip) > 0) {
 591                 return XFS_ITEM_PINNED;
 592         }
 593
 594         if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) {
 595                 return XFS_ITEM_LOCKED;
 596         }
 597
 598         if (!xfs_iflock_nowait(ip)) {
 599                 /*
 600                  * If someone else isn't already trying to push the inode
 601                  * buffer, we get to do it.
 602                  */
 603                 if (iip->ili_pushbuf_flag == 0) {
 604                         iip->ili_pushbuf_flag = 1;
 605 #ifdef DEBUG
 606                         iip->ili_push_owner = current_pid();
 607 #endif
 608                         /*
 609                          * Inode is left locked in shared mode.
 610                          * Pushbuf routine gets to unlock it.
 611                          */
 612                         return XFS_ITEM_PUSHBUF;
 613                 } else {
 614                         /*
 615                          * We hold the AIL lock, so we must specify the
 616                          * NONOTIFY flag so that we won't double trip.
 617                          */
 618                         xfs_iunlock(ip, XFS_ILOCK_SHARED|XFS_IUNLOCK_NONOTIFY);
 619                         return XFS_ITEM_FLUSHING;
 620                 }
 621                 /* NOTREACHED */
 622         }
 623
 624         /* Stale items should force out the iclog */
 625         if (ip->i_flags & XFS_ISTALE) {
 626                 xfs_ifunlock(ip);
 627                 xfs_iunlock(ip, XFS_ILOCK_SHARED|XFS_IUNLOCK_NONOTIFY);
 628                 return XFS_ITEM_PINNED;
 629         }
 630
 631 #ifdef DEBUG
 632         if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
 633                 ASSERT(iip->ili_format.ilf_fields != 0);
 634                 ASSERT(iip->ili_logged == 0);
 635                 ASSERT(iip->ili_item.li_flags & XFS_LI_IN_AIL);
 636         }
 637 #endif
 638         return XFS_ITEM_SUCCESS;
 639 }
 640
 641 /*
 642  * Unlock the inode associated with the inode log item.
 643  * Clear the fields of the inode and inode log item that
 644  * are specific to the current transaction.  If the
 645  * hold flags is set, do not unlock the inode.
 646  */
 647 STATIC void
 648 xfs_inode_item_unlock(
 649         xfs_inode_log_item_t    *iip)
 650 {
 651         uint            hold;
 652         uint            iolocked;
 653         uint            lock_flags;
 654         xfs_inode_t     *ip;
 655
 656         ASSERT(iip != NULL);
 657         ASSERT(iip->ili_inode->i_itemp != NULL);
 658         ASSERT(xfs_isilocked(iip->ili_inode, XFS_ILOCK_EXCL));
 659         ASSERT((!(iip->ili_inode->i_itemp->ili_flags &
 660                   XFS_ILI_IOLOCKED_EXCL)) ||
 661                xfs_isilocked(iip->ili_inode, XFS_IOLOCK_EXCL));
 662         ASSERT((!(iip->ili_inode->i_itemp->ili_flags &
 663                   XFS_ILI_IOLOCKED_SHARED)) ||
 664                xfs_isilocked(iip->ili_inode, XFS_IOLOCK_SHARED));
 665         /*
 666          * Clear the transaction pointer in the inode.
 667          */
 668         ip = iip->ili_inode;
 669         ip->i_transp = NULL;
 670
 671         /*
 672          * If the inode needed a separate buffer with which to log
 673          * its extents, then free it now.
 674          */
 675         if (iip->ili_extents_buf != NULL) {
 676                 ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS);
 677                 ASSERT(ip->i_d.di_nextents > 0);
 678                 ASSERT(iip->ili_format.ilf_fields & XFS_ILOG_DEXT);
 679                 ASSERT(ip->i_df.if_bytes > 0);
 680                 kmem_free(iip->ili_extents_buf);
 681                 iip->ili_extents_buf = NULL;
 682         }
 683         if (iip->ili_aextents_buf != NULL) {
 684                 ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS);
 685                 ASSERT(ip->i_d.di_anextents > 0);
 686                 ASSERT(iip->ili_format.ilf_fields & XFS_ILOG_AEXT);
 687                 ASSERT(ip->i_afp->if_bytes > 0);
 688                 kmem_free(iip->ili_aextents_buf);
 689                 iip->ili_aextents_buf = NULL;
 690         }
 691
 692         /*
 693          * Figure out if we should unlock the inode or not.
 694          */
 695         hold = iip->ili_flags & XFS_ILI_HOLD;
 696
 697         /*
 698          * Before clearing out the flags, remember whether we
 699          * are holding the inode's IO lock.
 700          */
 701         iolocked = iip->ili_flags & XFS_ILI_IOLOCKED_ANY;
 702
 703         /*
 704          * Clear out the fields of the inode log item particular
 705          * to the current transaction.
 706          */
 707         iip->ili_flags = 0;
 708
 709         /*
 710          * Unlock the inode if XFS_ILI_HOLD was not set.
 711          */
 712         if (!hold) {
 713                 lock_flags = XFS_ILOCK_EXCL;
 714                 if (iolocked & XFS_ILI_IOLOCKED_EXCL) {
 715                         lock_flags |= XFS_IOLOCK_EXCL;
 716                 } else if (iolocked & XFS_ILI_IOLOCKED_SHARED) {
 717                         lock_flags |= XFS_IOLOCK_SHARED;
 718                 }
 719                 xfs_iput(iip->ili_inode, lock_flags);
 720         }
 721 }
 722
 723 /*
 724  * This is called to find out where the oldest active copy of the
 725  * inode log item in the on disk log resides now that the last log
 726  * write of it completed at the given lsn.  Since we always re-log
 727  * all dirty data in an inode, the latest copy in the on disk log
 728  * is the only one that matters.  Therefore, simply return the
 729  * given lsn.
 730  */
 731 /*ARGSUSED*/
 732 STATIC xfs_lsn_t
 733 xfs_inode_item_committed(
 734         xfs_inode_log_item_t    *iip,
 735         xfs_lsn_t               lsn)
 736 {
 737         return (lsn);
 738 }
 739
 740 /*
 741  * This gets called by xfs_trans_push_ail(), when IOP_TRYLOCK
 742  * failed to get the inode flush lock but did get the inode locked SHARED.
 743  * Here we're trying to see if the inode buffer is incore, and if so whether it's
 744  * marked delayed write. If that's the case, we'll initiate a bawrite on that
 745  * buffer to expedite the process.
 746  *
 747  * We aren't holding the AIL lock (or the flush lock) when this gets called,
 748  * so it is inherently race-y.
 749  */
 750 STATIC void
 751 xfs_inode_item_pushbuf(
 752         xfs_inode_log_item_t    *iip)
 753 {
 754         xfs_inode_t     *ip;
 755         xfs_mount_t     *mp;
 756         xfs_buf_t       *bp;
 757         uint            dopush;
 758
 759         ip = iip->ili_inode;
 760
 761         ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
 762
 763         /*
 764          * The ili_pushbuf_flag keeps others from
 765          * trying to duplicate our effort.
 766          */
 767         ASSERT(iip->ili_pushbuf_flag != 0);
 768         ASSERT(iip->ili_push_owner == current_pid());
 769
 770         /*
 771          * If a flush is not in progress anymore, chances are that the
 772          * inode was taken off the AIL. So, just get out.
 773          */
 774         if (completion_done(&ip->i_flush) ||
 775             ((iip->ili_item.li_flags & XFS_LI_IN_AIL) == 0)) {
 776                 iip->ili_pushbuf_flag = 0;
 777                 xfs_iunlock(ip, XFS_ILOCK_SHARED);
 778                 return;
 779         }
 780
 781         mp = ip->i_mount;
 782         bp = xfs_incore(mp->m_ddev_targp, iip->ili_format.ilf_blkno,
 783                     iip->ili_format.ilf_len, XFS_INCORE_TRYLOCK);
 784
 785         if (bp != NULL) {
 786                 if (XFS_BUF_ISDELAYWRITE(bp)) {
 787                         /*
 788                          * We were racing with iflush because we don't hold
 789                          * the AIL lock or the flush lock. However, at this point,
 790                          * we have the buffer, and we know that it's dirty.
 791                          * So, it's possible that iflush raced with us, and
 792                          * this item is already taken off the AIL.
 793                          * If not, we can flush it async.
 794                          */
 795                         dopush = ((iip->ili_item.li_flags & XFS_LI_IN_AIL) &&
 796                                   !completion_done(&ip->i_flush));
 797                         iip->ili_pushbuf_flag = 0;
 798                         xfs_iunlock(ip, XFS_ILOCK_SHARED);
 799                         xfs_buftrace("INODE ITEM PUSH", bp);
 800                         if (XFS_BUF_ISPINNED(bp)) {
 801                                 xfs_log_force(mp, (xfs_lsn_t)0,
 802                                               XFS_LOG_FORCE);
 803                         }
 804                         if (dopush) {
 805                                 int     error;
 806                                 error = xfs_bawrite(mp, bp);
 807                                 if (error)
 808                                         xfs_fs_cmn_err(CE_WARN, mp,
 809                 "xfs_inode_item_pushbuf: pushbuf error %d on iip %p, bp %p",
 810                                                         error, iip, bp);
 811                         } else {
 812                                 xfs_buf_relse(bp);
 813                         }
 814                 } else {
 815                         iip->ili_pushbuf_flag = 0;
 816                         xfs_iunlock(ip, XFS_ILOCK_SHARED);
 817                         xfs_buf_relse(bp);
 818                 }
 819                 return;
 820         }
 821         /*
 822          * We have to be careful about resetting pushbuf flag too early (above).
 823          * Even though in theory we can do it as soon as we have the buflock,
 824          * we don't want others to be doing work needlessly. They'll come to
 825          * this function thinking that pushing the buffer is their
 826          * responsibility only to find that the buffer is still locked by
 827          * another doing the same thing
 828          */
 829         iip->ili_pushbuf_flag = 0;
 830         xfs_iunlock(ip, XFS_ILOCK_SHARED);
 831         return;
 832 }
 833
 834
 835 /*
 836  * This is called to asynchronously write the inode associated with this
 837  * inode log item out to disk. The inode will already have been locked by
 838  * a successful call to xfs_inode_item_trylock().
 839  */
 840 STATIC void
 841 xfs_inode_item_push(
 842         xfs_inode_log_item_t    *iip)
 843 {
 844         xfs_inode_t     *ip;
 845
 846         ip = iip->ili_inode;
 847
 848         ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
 849         ASSERT(!completion_done(&ip->i_flush));
 850         /*
 851          * Since we were able to lock the inode's flush lock and
 852          * we found it on the AIL, the inode must be dirty.  This
 853          * is because the inode is removed from the AIL while still
 854          * holding the flush lock in xfs_iflush_done().  Thus, if
 855          * we found it in the AIL and were able to obtain the flush
 856          * lock without sleeping, then there must not have been
 857          * anyone in the process of flushing the inode.
 858          */
 859         ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) ||
 860                iip->ili_format.ilf_fields != 0);
 861
 862         /*
 863          * Write out the inode.  The completion routine ('iflush_done') will
 864          * pull it from the AIL, mark it clean, unlock the flush lock.
 865          */
 866         (void) xfs_iflush(ip, XFS_IFLUSH_ASYNC);
 867         xfs_iunlock(ip, XFS_ILOCK_SHARED);
 868
 869         return;
 870 }
 871
 872 /*
 873  * XXX rcc - this one really has to do something.  Probably needs
 874  * to stamp in a new field in the incore inode.
 875  */
 876 /* ARGSUSED */
 877 STATIC void
 878 xfs_inode_item_committing(
 879         xfs_inode_log_item_t    *iip,
 880         xfs_lsn_t               lsn)
 881 {
 882         iip->ili_last_lsn = lsn;
 883         return;
 884 }
 885
 886 /*
 887  * This is the ops vector shared by all buf log items.
 888  */
 889 static struct xfs_item_ops xfs_inode_item_ops = {
 890         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_inode_item_size,
 891         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 892                                         xfs_inode_item_format,
 893         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_inode_item_pin,
 894         .iop_unpin      = (void(*)(xfs_log_item_t*, int))xfs_inode_item_unpin,
 895         .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
 896                                         xfs_inode_item_unpin_remove,
 897         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_inode_item_trylock,
 898         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_inode_item_unlock,
 899         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 900                                         xfs_inode_item_committed,
 901         .iop_push       = (void(*)(xfs_log_item_t*))xfs_inode_item_push,
 902         .iop_pushbuf    = (void(*)(xfs_log_item_t*))xfs_inode_item_pushbuf,
 903         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 904                                         xfs_inode_item_committing
 905 };
 906
 907
 908 /*
 909  * Initialize the inode log item for a newly allocated (in-core) inode.
 910  */
 911 void
 912 xfs_inode_item_init(
 913         xfs_inode_t     *ip,
 914         xfs_mount_t     *mp)
 915 {
 916         xfs_inode_log_item_t    *iip;
 917
 918         ASSERT(ip->i_itemp == NULL);
 919         iip = ip->i_itemp = kmem_zone_zalloc(xfs_ili_zone, KM_SLEEP);
 920
 921         iip->ili_item.li_type = XFS_LI_INODE;
 922         iip->ili_item.li_ops = &xfs_inode_item_ops;
 923         iip->ili_item.li_mountp = mp;
 924         iip->ili_item.li_ailp = mp->m_ail;
 925         iip->ili_inode = ip;
 926
 927         /*
 928            We have zeroed memory. No need ...
 929            iip->ili_extents_buf = NULL;
 930            iip->ili_pushbuf_flag = 0;
 931          */
 932
 933         iip->ili_format.ilf_type = XFS_LI_INODE;
 934         iip->ili_format.ilf_ino = ip->i_ino;
 935         iip->ili_format.ilf_blkno = ip->i_imap.im_blkno;
 936         iip->ili_format.ilf_len = ip->i_imap.im_len;
 937         iip->ili_format.ilf_boffset = ip->i_imap.im_boffset;
 938 }
 939
 940 /*
 941  * Free the inode log item and any memory hanging off of it.
 942  */
 943 void
 944 xfs_inode_item_destroy(
 945         xfs_inode_t     *ip)
 946 {
 947 #ifdef XFS_TRANS_DEBUG
 948         if (ip->i_itemp->ili_root_size != 0) {
 949                 kmem_free(ip->i_itemp->ili_orig_root);
 950         }
 951 #endif
 952         kmem_zone_free(xfs_ili_zone, ip->i_itemp);
 953 }
 954
 955
 956 /*
 957  * This is the inode flushing I/O completion routine.  It is called
 958  * from interrupt level when the buffer containing the inode is
 959  * flushed to disk.  It is responsible for removing the inode item
 960  * from the AIL if it has not been re-logged, and unlocking the inode's
 961  * flush lock.
 962  */
 963 /*ARGSUSED*/
 964 void
 965 xfs_iflush_done(
 966         xfs_buf_t               *bp,
 967         xfs_inode_log_item_t    *iip)
 968 {
 969         xfs_inode_t             *ip = iip->ili_inode;
 970         struct xfs_ail          *ailp = iip->ili_item.li_ailp;
 971
 972         /*
 973          * We only want to pull the item from the AIL if it is
 974          * actually there and its location in the log has not
 975          * changed since we started the flush.  Thus, we only bother
 976          * if the ili_logged flag is set and the inode's lsn has not
 977          * changed.  First we check the lsn outside
 978          * the lock since it's cheaper, and then we recheck while
 979          * holding the lock before removing the inode from the AIL.
 980          */
 981         if (iip->ili_logged &&
 982             (iip->ili_item.li_lsn == iip->ili_flush_lsn)) {
 983                 spin_lock(&ailp->xa_lock);
 984                 if (iip->ili_item.li_lsn == iip->ili_flush_lsn) {
 985                         /* xfs_trans_ail_delete() drops the AIL lock. */
 986                         xfs_trans_ail_delete(ailp, (xfs_log_item_t*)iip);
 987                 } else {
 988                         spin_unlock(&ailp->xa_lock);
 989                 }
 990         }
 991
 992         iip->ili_logged = 0;
 993
 994         /*
 995          * Clear the ili_last_fields bits now that we know that the
 996          * data corresponding to them is safely on disk.
 997          */
 998         iip->ili_last_fields = 0;
 999
1000         /*
1001          * Release the inode's flush lock since we're done with it.
1002          */
1003         xfs_ifunlock(ip);
1004
1005         return;
1006 }
1007
1008 /*
1009  * This is the inode flushing abort routine.  It is called
1010  * from xfs_iflush when the filesystem is shutting down to clean
1011  * up the inode state.
1012  * It is responsible for removing the inode item
1013  * from the AIL if it has not been re-logged, and unlocking the inode's
1014  * flush lock.
1015  */
1016 void
1017 xfs_iflush_abort(
1018         xfs_inode_t             *ip)
1019 {
1020         xfs_inode_log_item_t    *iip = ip->i_itemp;
1021         xfs_mount_t             *mp;
1022
1023         iip = ip->i_itemp;
1024         mp = ip->i_mount;
1025         if (iip) {
1026                 struct xfs_ail  *ailp = iip->ili_item.li_ailp;
1027                 if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
1028                         spin_lock(&ailp->xa_lock);
1029                         if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
1030                                 /* xfs_trans_ail_delete() drops the AIL lock. */
1031                                 xfs_trans_ail_delete(ailp, (xfs_log_item_t *)iip);
1032                         } else
1033                                 spin_unlock(&ailp->xa_lock);
1034                 }
1035                 iip->ili_logged = 0;
1036                 /*
1037                  * Clear the ili_last_fields bits now that we know that the
1038                  * data corresponding to them is safely on disk.
1039                  */
1040                 iip->ili_last_fields = 0;
1041                 /*
1042                  * Clear the inode logging fields so no more flushes are
1043                  * attempted.
1044                  */
1045                 iip->ili_format.ilf_fields = 0;
1046         }
1047         /*
1048          * Release the inode's flush lock since we're done with it.
1049          */
1050         xfs_ifunlock(ip);
1051 }
1052
1053 void
1054 xfs_istale_done(
1055         xfs_buf_t               *bp,
1056         xfs_inode_log_item_t    *iip)
1057 {
1058         xfs_iflush_abort(iip->ili_inode);
1059 }
1060
1061 /*
1062  * convert an xfs_inode_log_format struct from either 32 or 64 bit versions
1063  * (which can have different field alignments) to the native version
1064  */
1065 int
1066 xfs_inode_item_format_convert(
1067         xfs_log_iovec_t         *buf,
1068         xfs_inode_log_format_t  *in_f)
1069 {
1070         if (buf->i_len == sizeof(xfs_inode_log_format_32_t)) {
1071                 xfs_inode_log_format_32_t *in_f32;
1072
1073                 in_f32 = (xfs_inode_log_format_32_t *)buf->i_addr;
1074                 in_f->ilf_type = in_f32->ilf_type;
1075                 in_f->ilf_size = in_f32->ilf_size;
1076                 in_f->ilf_fields = in_f32->ilf_fields;
1077                 in_f->ilf_asize = in_f32->ilf_asize;
1078                 in_f->ilf_dsize = in_f32->ilf_dsize;
1079                 in_f->ilf_ino = in_f32->ilf_ino;
1080                 /* copy biggest field of ilf_u */
1081                 memcpy(in_f->ilf_u.ilfu_uuid.__u_bits,
1082                        in_f32->ilf_u.ilfu_uuid.__u_bits,
1083                        sizeof(uuid_t));
1084                 in_f->ilf_blkno = in_f32->ilf_blkno;
1085                 in_f->ilf_len = in_f32->ilf_len;
1086                 in_f->ilf_boffset = in_f32->ilf_boffset;
1087                 return 0;
1088         } else if (buf->i_len == sizeof(xfs_inode_log_format_64_t)){
1089                 xfs_inode_log_format_64_t *in_f64;
1090
1091                 in_f64 = (xfs_inode_log_format_64_t *)buf->i_addr;
1092                 in_f->ilf_type = in_f64->ilf_type;
1093                 in_f->ilf_size = in_f64->ilf_size;
1094                 in_f->ilf_fields = in_f64->ilf_fields;
1095                 in_f->ilf_asize = in_f64->ilf_asize;
1096                 in_f->ilf_dsize = in_f64->ilf_dsize;
1097                 in_f->ilf_ino = in_f64->ilf_ino;
1098                 /* copy biggest field of ilf_u */
1099                 memcpy(in_f->ilf_u.ilfu_uuid.__u_bits,
1100                        in_f64->ilf_u.ilfu_uuid.__u_bits,
1101                        sizeof(uuid_t));
1102                 in_f->ilf_blkno = in_f64->ilf_blkno;
1103                 in_f->ilf_len = in_f64->ilf_len;
1104                 in_f->ilf_boffset = in_f64->ilf_boffset;
1105                 return 0;
1106         }
1107         return EFSCORRUPTED;
1108 }