ClabureDB: Classified Bug-Reports Database

Project: Linux Kernel

Showing error 1000

User:	Jiri Slaby
Error type:	Leaving function in locked state
Error type description:	Some lock is not unlocked on all paths of a function, so it is leaked
File location:	fs/xfs/xfs_inode_item.c
Line in file:	1066
Project:	Linux Kernel
Project version:	2.6.28
Tools:	Stanse (1.2)
Entered:	2012-03-02 21:35:18 UTC
Source:

   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
  46kmem_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 */
  55STATIC uint
  56xfs_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 */
 212STATIC void
 213xfs_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         * We don't have to worry about re-ordering here because
 267         * the update_size field is protected by the inode lock
 268         * and we have that held in exclusive mode.
 269         */
 270        if (ip->i_update_size)
 271                ip->i_update_size = 0;
 272
 273        /*
 274         * Make sure to get the latest atime from the Linux inode.
 275         */
 276        xfs_synchronize_atime(ip);
 277
 278        /*
 279         * make sure the linux inode is dirty
 280         */
 281        xfs_mark_inode_dirty_sync(ip);
 282
 283        vecp->i_addr = (xfs_caddr_t)&ip->i_d;
 284        vecp->i_len  = sizeof(xfs_dinode_core_t);
 285        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_ICORE);
 286        vecp++;
 287        nvecs++;
 288        iip->ili_format.ilf_fields |= XFS_ILOG_CORE;
 289
 290        /*
 291         * If this is really an old format inode, then we need to
 292         * log it as such.  This means that we have to copy the link
 293         * count from the new field to the old.  We don't have to worry
 294         * about the new fields, because nothing trusts them as long as
 295         * the old inode version number is there.  If the superblock already
 296         * has a new version number, then we don't bother converting back.
 297         */
 298        mp = ip->i_mount;
 299        ASSERT(ip->i_d.di_version == XFS_DINODE_VERSION_1 ||
 300               xfs_sb_version_hasnlink(&mp->m_sb));
 301        if (ip->i_d.di_version == XFS_DINODE_VERSION_1) {
 302                if (!xfs_sb_version_hasnlink(&mp->m_sb)) {
 303                        /*
 304                         * Convert it back.
 305                         */
 306                        ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1);
 307                        ip->i_d.di_onlink = ip->i_d.di_nlink;
 308                } else {
 309                        /*
 310                         * The superblock version has already been bumped,
 311                         * so just make the conversion to the new inode
 312                         * format permanent.
 313                         */
 314                        ip->i_d.di_version = XFS_DINODE_VERSION_2;
 315                        ip->i_d.di_onlink = 0;
 316                        memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
 317                }
 318        }
 319
 320        switch (ip->i_d.di_format) {
 321        case XFS_DINODE_FMT_EXTENTS:
 322                ASSERT(!(iip->ili_format.ilf_fields &
 323                         (XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
 324                          XFS_ILOG_DEV | XFS_ILOG_UUID)));
 325                if (iip->ili_format.ilf_fields & XFS_ILOG_DEXT) {
 326                        ASSERT(ip->i_df.if_bytes > 0);
 327                        ASSERT(ip->i_df.if_u1.if_extents != NULL);
 328                        ASSERT(ip->i_d.di_nextents > 0);
 329                        ASSERT(iip->ili_extents_buf == NULL);
 330                        nrecs = ip->i_df.if_bytes /
 331                                (uint)sizeof(xfs_bmbt_rec_t);
 332                        ASSERT(nrecs > 0);
 333#ifdef XFS_NATIVE_HOST
 334                        if (nrecs == ip->i_d.di_nextents) {
 335                                /*
 336                                 * There are no delayed allocation
 337                                 * extents, so just point to the
 338                                 * real extents array.
 339                                 */
 340                                vecp->i_addr =
 341                                        (char *)(ip->i_df.if_u1.if_extents);
 342                                vecp->i_len = ip->i_df.if_bytes;
 343                                XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IEXT);
 344                        } else
 345#endif
 346                        {
 347                                /*
 348                                 * There are delayed allocation extents
 349                                 * in the inode, or we need to convert
 350                                 * the extents to on disk format.
 351                                 * Use xfs_iextents_copy()
 352                                 * to copy only the real extents into
 353                                 * a separate buffer.  We'll free the
 354                                 * buffer in the unlock routine.
 355                                 */
 356                                ext_buffer = kmem_alloc(ip->i_df.if_bytes,
 357                                        KM_SLEEP);
 358                                iip->ili_extents_buf = ext_buffer;
 359                                vecp->i_addr = (xfs_caddr_t)ext_buffer;
 360                                vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
 361                                                XFS_DATA_FORK);
 362                                XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IEXT);
 363                        }
 364                        ASSERT(vecp->i_len <= ip->i_df.if_bytes);
 365                        iip->ili_format.ilf_dsize = vecp->i_len;
 366                        vecp++;
 367                        nvecs++;
 368                }
 369                break;
 370
 371        case XFS_DINODE_FMT_BTREE:
 372                ASSERT(!(iip->ili_format.ilf_fields &
 373                         (XFS_ILOG_DDATA | XFS_ILOG_DEXT |
 374                          XFS_ILOG_DEV | XFS_ILOG_UUID)));
 375                if (iip->ili_format.ilf_fields & XFS_ILOG_DBROOT) {
 376                        ASSERT(ip->i_df.if_broot_bytes > 0);
 377                        ASSERT(ip->i_df.if_broot != NULL);
 378                        vecp->i_addr = (xfs_caddr_t)ip->i_df.if_broot;
 379                        vecp->i_len = ip->i_df.if_broot_bytes;
 380                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IBROOT);
 381                        vecp++;
 382                        nvecs++;
 383                        iip->ili_format.ilf_dsize = ip->i_df.if_broot_bytes;
 384                }
 385                break;
 386
 387        case XFS_DINODE_FMT_LOCAL:
 388                ASSERT(!(iip->ili_format.ilf_fields &
 389                         (XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
 390                          XFS_ILOG_DEV | XFS_ILOG_UUID)));
 391                if (iip->ili_format.ilf_fields & XFS_ILOG_DDATA) {
 392                        ASSERT(ip->i_df.if_bytes > 0);
 393                        ASSERT(ip->i_df.if_u1.if_data != NULL);
 394                        ASSERT(ip->i_d.di_size > 0);
 395
 396                        vecp->i_addr = (xfs_caddr_t)ip->i_df.if_u1.if_data;
 397                        /*
 398                         * Round i_bytes up to a word boundary.
 399                         * The underlying memory is guaranteed to
 400                         * to be there by xfs_idata_realloc().
 401                         */
 402                        data_bytes = roundup(ip->i_df.if_bytes, 4);
 403                        ASSERT((ip->i_df.if_real_bytes == 0) ||
 404                               (ip->i_df.if_real_bytes == data_bytes));
 405                        vecp->i_len = (int)data_bytes;
 406                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_ILOCAL);
 407                        vecp++;
 408                        nvecs++;
 409                        iip->ili_format.ilf_dsize = (unsigned)data_bytes;
 410                }
 411                break;
 412
 413        case XFS_DINODE_FMT_DEV:
 414                ASSERT(!(iip->ili_format.ilf_fields &
 415                         (XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
 416                          XFS_ILOG_DDATA | XFS_ILOG_UUID)));
 417                if (iip->ili_format.ilf_fields & XFS_ILOG_DEV) {
 418                        iip->ili_format.ilf_u.ilfu_rdev =
 419                                ip->i_df.if_u2.if_rdev;
 420                }
 421                break;
 422
 423        case XFS_DINODE_FMT_UUID:
 424                ASSERT(!(iip->ili_format.ilf_fields &
 425                         (XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
 426                          XFS_ILOG_DDATA | XFS_ILOG_DEV)));
 427                if (iip->ili_format.ilf_fields & XFS_ILOG_UUID) {
 428                        iip->ili_format.ilf_u.ilfu_uuid =
 429                                ip->i_df.if_u2.if_uuid;
 430                }
 431                break;
 432
 433        default:
 434                ASSERT(0);
 435                break;
 436        }
 437
 438        /*
 439         * If there are no attributes associated with the file,
 440         * then we're done.
 441         * Assert that no attribute-related log flags are set.
 442         */
 443        if (!XFS_IFORK_Q(ip)) {
 444                ASSERT(nvecs == iip->ili_item.li_desc->lid_size);
 445                iip->ili_format.ilf_size = nvecs;
 446                ASSERT(!(iip->ili_format.ilf_fields &
 447                         (XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT)));
 448                return;
 449        }
 450
 451        switch (ip->i_d.di_aformat) {
 452        case XFS_DINODE_FMT_EXTENTS:
 453                ASSERT(!(iip->ili_format.ilf_fields &
 454                         (XFS_ILOG_ADATA | XFS_ILOG_ABROOT)));
 455                if (iip->ili_format.ilf_fields & XFS_ILOG_AEXT) {
 456                        ASSERT(ip->i_afp->if_bytes > 0);
 457                        ASSERT(ip->i_afp->if_u1.if_extents != NULL);
 458                        ASSERT(ip->i_d.di_anextents > 0);
 459#ifdef DEBUG
 460                        nrecs = ip->i_afp->if_bytes /
 461                                (uint)sizeof(xfs_bmbt_rec_t);
 462#endif
 463                        ASSERT(nrecs > 0);
 464                        ASSERT(nrecs == ip->i_d.di_anextents);
 465#ifdef XFS_NATIVE_HOST
 466                        /*
 467                         * There are not delayed allocation extents
 468                         * for attributes, so just point at the array.
 469                         */
 470                        vecp->i_addr = (char *)(ip->i_afp->if_u1.if_extents);
 471                        vecp->i_len = ip->i_afp->if_bytes;
 472#else
 473                        ASSERT(iip->ili_aextents_buf == NULL);
 474                        /*
 475                         * Need to endian flip before logging
 476                         */
 477                        ext_buffer = kmem_alloc(ip->i_afp->if_bytes,
 478                                KM_SLEEP);
 479                        iip->ili_aextents_buf = ext_buffer;
 480                        vecp->i_addr = (xfs_caddr_t)ext_buffer;
 481                        vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
 482                                        XFS_ATTR_FORK);
 483#endif
 484                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IATTR_EXT);
 485                        iip->ili_format.ilf_asize = vecp->i_len;
 486                        vecp++;
 487                        nvecs++;
 488                }
 489                break;
 490
 491        case XFS_DINODE_FMT_BTREE:
 492                ASSERT(!(iip->ili_format.ilf_fields &
 493                         (XFS_ILOG_ADATA | XFS_ILOG_AEXT)));
 494                if (iip->ili_format.ilf_fields & XFS_ILOG_ABROOT) {
 495                        ASSERT(ip->i_afp->if_broot_bytes > 0);
 496                        ASSERT(ip->i_afp->if_broot != NULL);
 497                        vecp->i_addr = (xfs_caddr_t)ip->i_afp->if_broot;
 498                        vecp->i_len = ip->i_afp->if_broot_bytes;
 499                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IATTR_BROOT);
 500                        vecp++;
 501                        nvecs++;
 502                        iip->ili_format.ilf_asize = ip->i_afp->if_broot_bytes;
 503                }
 504                break;
 505
 506        case XFS_DINODE_FMT_LOCAL:
 507                ASSERT(!(iip->ili_format.ilf_fields &
 508                         (XFS_ILOG_ABROOT | XFS_ILOG_AEXT)));
 509                if (iip->ili_format.ilf_fields & XFS_ILOG_ADATA) {
 510                        ASSERT(ip->i_afp->if_bytes > 0);
 511                        ASSERT(ip->i_afp->if_u1.if_data != NULL);
 512
 513                        vecp->i_addr = (xfs_caddr_t)ip->i_afp->if_u1.if_data;
 514                        /*
 515                         * Round i_bytes up to a word boundary.
 516                         * The underlying memory is guaranteed to
 517                         * to be there by xfs_idata_realloc().
 518                         */
 519                        data_bytes = roundup(ip->i_afp->if_bytes, 4);
 520                        ASSERT((ip->i_afp->if_real_bytes == 0) ||
 521                               (ip->i_afp->if_real_bytes == data_bytes));
 522                        vecp->i_len = (int)data_bytes;
 523                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IATTR_LOCAL);
 524                        vecp++;
 525                        nvecs++;
 526                        iip->ili_format.ilf_asize = (unsigned)data_bytes;
 527                }
 528                break;
 529
 530        default:
 531                ASSERT(0);
 532                break;
 533        }
 534
 535        ASSERT(nvecs == iip->ili_item.li_desc->lid_size);
 536        iip->ili_format.ilf_size = nvecs;
 537}
 538
 539
 540/*
 541 * This is called to pin the inode associated with the inode log
 542 * item in memory so it cannot be written out.  Do this by calling
 543 * xfs_ipin() to bump the pin count in the inode while holding the
 544 * inode pin lock.
 545 */
 546STATIC void
 547xfs_inode_item_pin(
 548        xfs_inode_log_item_t        *iip)
 549{
 550        ASSERT(xfs_isilocked(iip->ili_inode, XFS_ILOCK_EXCL));
 551        xfs_ipin(iip->ili_inode);
 552}
 553
 554
 555/*
 556 * This is called to unpin the inode associated with the inode log
 557 * item which was previously pinned with a call to xfs_inode_item_pin().
 558 * Just call xfs_iunpin() on the inode to do this.
 559 */
 560/* ARGSUSED */
 561STATIC void
 562xfs_inode_item_unpin(
 563        xfs_inode_log_item_t        *iip,
 564        int                        stale)
 565{
 566        xfs_iunpin(iip->ili_inode);
 567}
 568
 569/* ARGSUSED */
 570STATIC void
 571xfs_inode_item_unpin_remove(
 572        xfs_inode_log_item_t        *iip,
 573        xfs_trans_t                *tp)
 574{
 575        xfs_iunpin(iip->ili_inode);
 576}
 577
 578/*
 579 * This is called to attempt to lock the inode associated with this
 580 * inode log item, in preparation for the push routine which does the actual
 581 * iflush.  Don't sleep on the inode lock or the flush lock.
 582 *
 583 * If the flush lock is already held, indicating that the inode has
 584 * been or is in the process of being flushed, then (ideally) we'd like to
 585 * see if the inode's buffer is still incore, and if so give it a nudge.
 586 * We delay doing so until the pushbuf routine, though, to avoid holding
 587 * the AIL lock across a call to the blackhole which is the buffer cache.
 588 * Also we don't want to sleep in any device strategy routines, which can happen
 589 * if we do the subsequent bawrite in here.
 590 */
 591STATIC uint
 592xfs_inode_item_trylock(
 593        xfs_inode_log_item_t        *iip)
 594{
 595        register xfs_inode_t        *ip;
 596
 597        ip = iip->ili_inode;
 598
 599        if (xfs_ipincount(ip) > 0) {
 600                return XFS_ITEM_PINNED;
 601        }
 602
 603        if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) {
 604                return XFS_ITEM_LOCKED;
 605        }
 606
 607        if (!xfs_iflock_nowait(ip)) {
 608                /*
 609                 * If someone else isn't already trying to push the inode
 610                 * buffer, we get to do it.
 611                 */
 612                if (iip->ili_pushbuf_flag == 0) {
 613                        iip->ili_pushbuf_flag = 1;
 614#ifdef DEBUG
 615                        iip->ili_push_owner = current_pid();
 616#endif
 617                        /*
 618                         * Inode is left locked in shared mode.
 619                         * Pushbuf routine gets to unlock it.
 620                         */
 621                        return XFS_ITEM_PUSHBUF;
 622                } else {
 623                        /*
 624                         * We hold the AIL lock, so we must specify the
 625                         * NONOTIFY flag so that we won't double trip.
 626                         */
 627                        xfs_iunlock(ip, XFS_ILOCK_SHARED|XFS_IUNLOCK_NONOTIFY);
 628                        return XFS_ITEM_FLUSHING;
 629                }
 630                /* NOTREACHED */
 631        }
 632
 633        /* Stale items should force out the iclog */
 634        if (ip->i_flags & XFS_ISTALE) {
 635                xfs_ifunlock(ip);
 636                xfs_iunlock(ip, XFS_ILOCK_SHARED|XFS_IUNLOCK_NONOTIFY);
 637                return XFS_ITEM_PINNED;
 638        }
 639
 640#ifdef DEBUG
 641        if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
 642                ASSERT(iip->ili_format.ilf_fields != 0);
 643                ASSERT(iip->ili_logged == 0);
 644                ASSERT(iip->ili_item.li_flags & XFS_LI_IN_AIL);
 645        }
 646#endif
 647        return XFS_ITEM_SUCCESS;
 648}
 649
 650/*
 651 * Unlock the inode associated with the inode log item.
 652 * Clear the fields of the inode and inode log item that
 653 * are specific to the current transaction.  If the
 654 * hold flags is set, do not unlock the inode.
 655 */
 656STATIC void
 657xfs_inode_item_unlock(
 658        xfs_inode_log_item_t        *iip)
 659{
 660        uint                hold;
 661        uint                iolocked;
 662        uint                lock_flags;
 663        xfs_inode_t        *ip;
 664
 665        ASSERT(iip != NULL);
 666        ASSERT(iip->ili_inode->i_itemp != NULL);
 667        ASSERT(xfs_isilocked(iip->ili_inode, XFS_ILOCK_EXCL));
 668        ASSERT((!(iip->ili_inode->i_itemp->ili_flags &
 669                  XFS_ILI_IOLOCKED_EXCL)) ||
 670               xfs_isilocked(iip->ili_inode, XFS_IOLOCK_EXCL));
 671        ASSERT((!(iip->ili_inode->i_itemp->ili_flags &
 672                  XFS_ILI_IOLOCKED_SHARED)) ||
 673               xfs_isilocked(iip->ili_inode, XFS_IOLOCK_SHARED));
 674        /*
 675         * Clear the transaction pointer in the inode.
 676         */
 677        ip = iip->ili_inode;
 678        ip->i_transp = NULL;
 679
 680        /*
 681         * If the inode needed a separate buffer with which to log
 682         * its extents, then free it now.
 683         */
 684        if (iip->ili_extents_buf != NULL) {
 685                ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS);
 686                ASSERT(ip->i_d.di_nextents > 0);
 687                ASSERT(iip->ili_format.ilf_fields & XFS_ILOG_DEXT);
 688                ASSERT(ip->i_df.if_bytes > 0);
 689                kmem_free(iip->ili_extents_buf);
 690                iip->ili_extents_buf = NULL;
 691        }
 692        if (iip->ili_aextents_buf != NULL) {
 693                ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS);
 694                ASSERT(ip->i_d.di_anextents > 0);
 695                ASSERT(iip->ili_format.ilf_fields & XFS_ILOG_AEXT);
 696                ASSERT(ip->i_afp->if_bytes > 0);
 697                kmem_free(iip->ili_aextents_buf);
 698                iip->ili_aextents_buf = NULL;
 699        }
 700
 701        /*
 702         * Figure out if we should unlock the inode or not.
 703         */
 704        hold = iip->ili_flags & XFS_ILI_HOLD;
 705
 706        /*
 707         * Before clearing out the flags, remember whether we
 708         * are holding the inode's IO lock.
 709         */
 710        iolocked = iip->ili_flags & XFS_ILI_IOLOCKED_ANY;
 711
 712        /*
 713         * Clear out the fields of the inode log item particular
 714         * to the current transaction.
 715         */
 716        iip->ili_ilock_recur = 0;
 717        iip->ili_iolock_recur = 0;
 718        iip->ili_flags = 0;
 719
 720        /*
 721         * Unlock the inode if XFS_ILI_HOLD was not set.
 722         */
 723        if (!hold) {
 724                lock_flags = XFS_ILOCK_EXCL;
 725                if (iolocked & XFS_ILI_IOLOCKED_EXCL) {
 726                        lock_flags |= XFS_IOLOCK_EXCL;
 727                } else if (iolocked & XFS_ILI_IOLOCKED_SHARED) {
 728                        lock_flags |= XFS_IOLOCK_SHARED;
 729                }
 730                xfs_iput(iip->ili_inode, lock_flags);
 731        }
 732}
 733
 734/*
 735 * This is called to find out where the oldest active copy of the
 736 * inode log item in the on disk log resides now that the last log
 737 * write of it completed at the given lsn.  Since we always re-log
 738 * all dirty data in an inode, the latest copy in the on disk log
 739 * is the only one that matters.  Therefore, simply return the
 740 * given lsn.
 741 */
 742/*ARGSUSED*/
 743STATIC xfs_lsn_t
 744xfs_inode_item_committed(
 745        xfs_inode_log_item_t        *iip,
 746        xfs_lsn_t                lsn)
 747{
 748        return (lsn);
 749}
 750
 751/*
 752 * This gets called by xfs_trans_push_ail(), when IOP_TRYLOCK
 753 * failed to get the inode flush lock but did get the inode locked SHARED.
 754 * Here we're trying to see if the inode buffer is incore, and if so whether it's
 755 * marked delayed write. If that's the case, we'll initiate a bawrite on that
 756 * buffer to expedite the process.
 757 *
 758 * We aren't holding the AIL lock (or the flush lock) when this gets called,
 759 * so it is inherently race-y.
 760 */
 761STATIC void
 762xfs_inode_item_pushbuf(
 763        xfs_inode_log_item_t        *iip)
 764{
 765        xfs_inode_t        *ip;
 766        xfs_mount_t        *mp;
 767        xfs_buf_t        *bp;
 768        uint                dopush;
 769
 770        ip = iip->ili_inode;
 771
 772        ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
 773
 774        /*
 775         * The ili_pushbuf_flag keeps others from
 776         * trying to duplicate our effort.
 777         */
 778        ASSERT(iip->ili_pushbuf_flag != 0);
 779        ASSERT(iip->ili_push_owner == current_pid());
 780
 781        /*
 782         * If a flush is not in progress anymore, chances are that the
 783         * inode was taken off the AIL. So, just get out.
 784         */
 785        if (completion_done(&ip->i_flush) ||
 786            ((iip->ili_item.li_flags & XFS_LI_IN_AIL) == 0)) {
 787                iip->ili_pushbuf_flag = 0;
 788                xfs_iunlock(ip, XFS_ILOCK_SHARED);
 789                return;
 790        }
 791
 792        mp = ip->i_mount;
 793        bp = xfs_incore(mp->m_ddev_targp, iip->ili_format.ilf_blkno,
 794                    iip->ili_format.ilf_len, XFS_INCORE_TRYLOCK);
 795
 796        if (bp != NULL) {
 797                if (XFS_BUF_ISDELAYWRITE(bp)) {
 798                        /*
 799                         * We were racing with iflush because we don't hold
 800                         * the AIL lock or the flush lock. However, at this point,
 801                         * we have the buffer, and we know that it's dirty.
 802                         * So, it's possible that iflush raced with us, and
 803                         * this item is already taken off the AIL.
 804                         * If not, we can flush it async.
 805                         */
 806                        dopush = ((iip->ili_item.li_flags & XFS_LI_IN_AIL) &&
 807                                  !completion_done(&ip->i_flush));
 808                        iip->ili_pushbuf_flag = 0;
 809                        xfs_iunlock(ip, XFS_ILOCK_SHARED);
 810                        xfs_buftrace("INODE ITEM PUSH", bp);
 811                        if (XFS_BUF_ISPINNED(bp)) {
 812                                xfs_log_force(mp, (xfs_lsn_t)0,
 813                                              XFS_LOG_FORCE);
 814                        }
 815                        if (dopush) {
 816                                int        error;
 817                                error = xfs_bawrite(mp, bp);
 818                                if (error)
 819                                        xfs_fs_cmn_err(CE_WARN, mp,
 820                "xfs_inode_item_pushbuf: pushbuf error %d on iip %p, bp %p",
 821                                                        error, iip, bp);
 822                        } else {
 823                                xfs_buf_relse(bp);
 824                        }
 825                } else {
 826                        iip->ili_pushbuf_flag = 0;
 827                        xfs_iunlock(ip, XFS_ILOCK_SHARED);
 828                        xfs_buf_relse(bp);
 829                }
 830                return;
 831        }
 832        /*
 833         * We have to be careful about resetting pushbuf flag too early (above).
 834         * Even though in theory we can do it as soon as we have the buflock,
 835         * we don't want others to be doing work needlessly. They'll come to
 836         * this function thinking that pushing the buffer is their
 837         * responsibility only to find that the buffer is still locked by
 838         * another doing the same thing
 839         */
 840        iip->ili_pushbuf_flag = 0;
 841        xfs_iunlock(ip, XFS_ILOCK_SHARED);
 842        return;
 843}
 844
 845
 846/*
 847 * This is called to asynchronously write the inode associated with this
 848 * inode log item out to disk. The inode will already have been locked by
 849 * a successful call to xfs_inode_item_trylock().
 850 */
 851STATIC void
 852xfs_inode_item_push(
 853        xfs_inode_log_item_t        *iip)
 854{
 855        xfs_inode_t        *ip;
 856
 857        ip = iip->ili_inode;
 858
 859        ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
 860        ASSERT(!completion_done(&ip->i_flush));
 861        /*
 862         * Since we were able to lock the inode's flush lock and
 863         * we found it on the AIL, the inode must be dirty.  This
 864         * is because the inode is removed from the AIL while still
 865         * holding the flush lock in xfs_iflush_done().  Thus, if
 866         * we found it in the AIL and were able to obtain the flush
 867         * lock without sleeping, then there must not have been
 868         * anyone in the process of flushing the inode.
 869         */
 870        ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) ||
 871               iip->ili_format.ilf_fields != 0);
 872
 873        /*
 874         * Write out the inode.  The completion routine ('iflush_done') will
 875         * pull it from the AIL, mark it clean, unlock the flush lock.
 876         */
 877        (void) xfs_iflush(ip, XFS_IFLUSH_ASYNC);
 878        xfs_iunlock(ip, XFS_ILOCK_SHARED);
 879
 880        return;
 881}
 882
 883/*
 884 * XXX rcc - this one really has to do something.  Probably needs
 885 * to stamp in a new field in the incore inode.
 886 */
 887/* ARGSUSED */
 888STATIC void
 889xfs_inode_item_committing(
 890        xfs_inode_log_item_t        *iip,
 891        xfs_lsn_t                lsn)
 892{
 893        iip->ili_last_lsn = lsn;
 894        return;
 895}
 896
 897/*
 898 * This is the ops vector shared by all buf log items.
 899 */
 900static struct xfs_item_ops xfs_inode_item_ops = {
 901        .iop_size        = (uint(*)(xfs_log_item_t*))xfs_inode_item_size,
 902        .iop_format        = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 903                                        xfs_inode_item_format,
 904        .iop_pin        = (void(*)(xfs_log_item_t*))xfs_inode_item_pin,
 905        .iop_unpin        = (void(*)(xfs_log_item_t*, int))xfs_inode_item_unpin,
 906        .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
 907                                        xfs_inode_item_unpin_remove,
 908        .iop_trylock        = (uint(*)(xfs_log_item_t*))xfs_inode_item_trylock,
 909        .iop_unlock        = (void(*)(xfs_log_item_t*))xfs_inode_item_unlock,
 910        .iop_committed        = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 911                                        xfs_inode_item_committed,
 912        .iop_push        = (void(*)(xfs_log_item_t*))xfs_inode_item_push,
 913        .iop_pushbuf        = (void(*)(xfs_log_item_t*))xfs_inode_item_pushbuf,
 914        .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 915                                        xfs_inode_item_committing
 916};
 917
 918
 919/*
 920 * Initialize the inode log item for a newly allocated (in-core) inode.
 921 */
 922void
 923xfs_inode_item_init(
 924        xfs_inode_t        *ip,
 925        xfs_mount_t        *mp)
 926{
 927        xfs_inode_log_item_t        *iip;
 928
 929        ASSERT(ip->i_itemp == NULL);
 930        iip = ip->i_itemp = kmem_zone_zalloc(xfs_ili_zone, KM_SLEEP);
 931
 932        iip->ili_item.li_type = XFS_LI_INODE;
 933        iip->ili_item.li_ops = &xfs_inode_item_ops;
 934        iip->ili_item.li_mountp = mp;
 935        iip->ili_inode = ip;
 936
 937        /*
 938           We have zeroed memory. No need ...
 939           iip->ili_extents_buf = NULL;
 940           iip->ili_pushbuf_flag = 0;
 941         */
 942
 943        iip->ili_format.ilf_type = XFS_LI_INODE;
 944        iip->ili_format.ilf_ino = ip->i_ino;
 945        iip->ili_format.ilf_blkno = ip->i_blkno;
 946        iip->ili_format.ilf_len = ip->i_len;
 947        iip->ili_format.ilf_boffset = ip->i_boffset;
 948}
 949
 950/*
 951 * Free the inode log item and any memory hanging off of it.
 952 */
 953void
 954xfs_inode_item_destroy(
 955        xfs_inode_t        *ip)
 956{
 957#ifdef XFS_TRANS_DEBUG
 958        if (ip->i_itemp->ili_root_size != 0) {
 959                kmem_free(ip->i_itemp->ili_orig_root);
 960        }
 961#endif
 962        kmem_zone_free(xfs_ili_zone, ip->i_itemp);
 963}
 964
 965
 966/*
 967 * This is the inode flushing I/O completion routine.  It is called
 968 * from interrupt level when the buffer containing the inode is
 969 * flushed to disk.  It is responsible for removing the inode item
 970 * from the AIL if it has not been re-logged, and unlocking the inode's
 971 * flush lock.
 972 */
 973/*ARGSUSED*/
 974void
 975xfs_iflush_done(
 976        xfs_buf_t                *bp,
 977        xfs_inode_log_item_t        *iip)
 978{
 979        xfs_inode_t        *ip;
 980
 981        ip = iip->ili_inode;
 982
 983        /*
 984         * We only want to pull the item from the AIL if it is
 985         * actually there and its location in the log has not
 986         * changed since we started the flush.  Thus, we only bother
 987         * if the ili_logged flag is set and the inode's lsn has not
 988         * changed.  First we check the lsn outside
 989         * the lock since it's cheaper, and then we recheck while
 990         * holding the lock before removing the inode from the AIL.
 991         */
 992        if (iip->ili_logged &&
 993            (iip->ili_item.li_lsn == iip->ili_flush_lsn)) {
 994                spin_lock(&ip->i_mount->m_ail_lock);
 995                if (iip->ili_item.li_lsn == iip->ili_flush_lsn) {
 996                        /*
 997                         * xfs_trans_delete_ail() drops the AIL lock.
 998                         */
 999                        xfs_trans_delete_ail(ip->i_mount,
1000                                             (xfs_log_item_t*)iip);
1001                } else {
1002                        spin_unlock(&ip->i_mount->m_ail_lock);
1003                }
1004        }
1005
1006        iip->ili_logged = 0;
1007
1008        /*
1009         * Clear the ili_last_fields bits now that we know that the
1010         * data corresponding to them is safely on disk.
1011         */
1012        iip->ili_last_fields = 0;
1013
1014        /*
1015         * Release the inode's flush lock since we're done with it.
1016         */
1017        xfs_ifunlock(ip);
1018
1019        return;
1020}
1021
1022/*
1023 * This is the inode flushing abort routine.  It is called
1024 * from xfs_iflush when the filesystem is shutting down to clean
1025 * up the inode state.
1026 * It is responsible for removing the inode item
1027 * from the AIL if it has not been re-logged, and unlocking the inode's
1028 * flush lock.
1029 */
1030void
1031xfs_iflush_abort(
1032        xfs_inode_t                *ip)
1033{
1034        xfs_inode_log_item_t        *iip;
1035        xfs_mount_t                *mp;
1036
1037        iip = ip->i_itemp;
1038        mp = ip->i_mount;
1039        if (iip) {
1040                if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
1041                        spin_lock(&mp->m_ail_lock);
1042                        if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
1043                                /*
1044                                 * xfs_trans_delete_ail() drops the AIL lock.
1045                                 */
1046                                xfs_trans_delete_ail(mp, (xfs_log_item_t *)iip);
1047                        } else
1048                                spin_unlock(&mp->m_ail_lock);
1049                }
1050                iip->ili_logged = 0;
1051                /*
1052                 * Clear the ili_last_fields bits now that we know that the
1053                 * data corresponding to them is safely on disk.
1054                 */
1055                iip->ili_last_fields = 0;
1056                /*
1057                 * Clear the inode logging fields so no more flushes are
1058                 * attempted.
1059                 */
1060                iip->ili_format.ilf_fields = 0;
1061        }
1062        /*
1063         * Release the inode's flush lock since we're done with it.
1064         */
1065        xfs_ifunlock(ip);
1066}
1067
1068void
1069xfs_istale_done(
1070        xfs_buf_t                *bp,
1071        xfs_inode_log_item_t        *iip)
1072{
1073        xfs_iflush_abort(iip->ili_inode);
1074}
1075
1076/*
1077 * convert an xfs_inode_log_format struct from either 32 or 64 bit versions
1078 * (which can have different field alignments) to the native version
1079 */
1080int
1081xfs_inode_item_format_convert(
1082        xfs_log_iovec_t                *buf,
1083        xfs_inode_log_format_t        *in_f)
1084{
1085        if (buf->i_len == sizeof(xfs_inode_log_format_32_t)) {
1086                xfs_inode_log_format_32_t *in_f32;
1087
1088                in_f32 = (xfs_inode_log_format_32_t *)buf->i_addr;
1089                in_f->ilf_type = in_f32->ilf_type;
1090                in_f->ilf_size = in_f32->ilf_size;
1091                in_f->ilf_fields = in_f32->ilf_fields;
1092                in_f->ilf_asize = in_f32->ilf_asize;
1093                in_f->ilf_dsize = in_f32->ilf_dsize;
1094                in_f->ilf_ino = in_f32->ilf_ino;
1095                /* copy biggest field of ilf_u */
1096                memcpy(in_f->ilf_u.ilfu_uuid.__u_bits,
1097                       in_f32->ilf_u.ilfu_uuid.__u_bits,
1098                       sizeof(uuid_t));
1099                in_f->ilf_blkno = in_f32->ilf_blkno;
1100                in_f->ilf_len = in_f32->ilf_len;
1101                in_f->ilf_boffset = in_f32->ilf_boffset;
1102                return 0;
1103        } else if (buf->i_len == sizeof(xfs_inode_log_format_64_t)){
1104                xfs_inode_log_format_64_t *in_f64;
1105
1106                in_f64 = (xfs_inode_log_format_64_t *)buf->i_addr;
1107                in_f->ilf_type = in_f64->ilf_type;
1108                in_f->ilf_size = in_f64->ilf_size;
1109                in_f->ilf_fields = in_f64->ilf_fields;
1110                in_f->ilf_asize = in_f64->ilf_asize;
1111                in_f->ilf_dsize = in_f64->ilf_dsize;
1112                in_f->ilf_ino = in_f64->ilf_ino;
1113                /* copy biggest field of ilf_u */
1114                memcpy(in_f->ilf_u.ilfu_uuid.__u_bits,
1115                       in_f64->ilf_u.ilfu_uuid.__u_bits,
1116                       sizeof(uuid_t));
1117                in_f->ilf_blkno = in_f64->ilf_blkno;
1118                in_f->ilf_len = in_f64->ilf_len;
1119                in_f->ilf_boffset = in_f64->ilf_boffset;
1120                return 0;
1121        }
1122        return EFSCORRUPTED;
1123}