/* * Ensure the reflink bit is set in both inodes. */ STATIC int xfs_reflink_set_inode_flag( struct xfs_inode *src, struct xfs_inode *dest) { struct xfs_mount *mp = src->i_mount; int error; struct xfs_trans *tp; if (xfs_is_reflink_inode(src) && xfs_is_reflink_inode(dest)) return 0; error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); if (error) goto out_error; /* Lock both files against IO */ if (src->i_ino == dest->i_ino) xfs_ilock(src, XFS_ILOCK_EXCL); else xfs_lock_two_inodes(src, dest, XFS_ILOCK_EXCL); if (!xfs_is_reflink_inode(src)) { trace_xfs_reflink_set_inode_flag(src); xfs_trans_ijoin(tp, src, XFS_ILOCK_EXCL); src->i_d.di_flags2 |= XFS_DIFLAG2_REFLINK; xfs_trans_log_inode(tp, src, XFS_ILOG_CORE); xfs_ifork_init_cow(src); } else xfs_iunlock(src, XFS_ILOCK_EXCL); if (src->i_ino == dest->i_ino) goto commit_flags; if (!xfs_is_reflink_inode(dest)) { trace_xfs_reflink_set_inode_flag(dest); xfs_trans_ijoin(tp, dest, XFS_ILOCK_EXCL); dest->i_d.di_flags2 |= XFS_DIFLAG2_REFLINK; xfs_trans_log_inode(tp, dest, XFS_ILOG_CORE); xfs_ifork_init_cow(dest); } else xfs_iunlock(dest, XFS_ILOCK_EXCL); commit_flags: error = xfs_trans_commit(tp); if (error) goto out_error; return error; out_error: trace_xfs_reflink_set_inode_flag_error(dest, error, _RET_IP_); return error; }
int xfs_swap_extents( xfs_inode_t *ip, /* target inode */ xfs_inode_t *tip, /* tmp inode */ xfs_swapext_t *sxp) { xfs_mount_t *mp = ip->i_mount; xfs_trans_t *tp; xfs_bstat_t *sbp = &sxp->sx_stat; xfs_ifork_t *tempifp, *ifp, *tifp; int src_log_flags, target_log_flags; int error = 0; int aforkblks = 0; int taforkblks = 0; __uint64_t tmp; tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL); if (!tempifp) { error = XFS_ERROR(ENOMEM); goto out; } /* * we have to do two separate lock calls here to keep lockdep * happy. If we try to get all the locks in one call, lock will * report false positives when we drop the ILOCK and regain them * below. */ xfs_lock_two_inodes(ip, tip, XFS_IOLOCK_EXCL); xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL); /* Verify that both files have the same format */ if ((ip->i_d.di_mode & S_IFMT) != (tip->i_d.di_mode & S_IFMT)) { error = XFS_ERROR(EINVAL); goto out_unlock; } /* Verify both files are either real-time or non-realtime */ if (XFS_IS_REALTIME_INODE(ip) != XFS_IS_REALTIME_INODE(tip)) { error = XFS_ERROR(EINVAL); goto out_unlock; } error = -filemap_write_and_wait(VFS_I(tip)->i_mapping); if (error) goto out_unlock; truncate_pagecache_range(VFS_I(tip), 0, -1); /* Verify O_DIRECT for ftmp */ if (VN_CACHED(VFS_I(tip)) != 0) { error = XFS_ERROR(EINVAL); goto out_unlock; } /* Verify all data are being swapped */ if (sxp->sx_offset != 0 || sxp->sx_length != ip->i_d.di_size || sxp->sx_length != tip->i_d.di_size) { error = XFS_ERROR(EFAULT); goto out_unlock; } trace_xfs_swap_extent_before(ip, 0); trace_xfs_swap_extent_before(tip, 1); /* check inode formats now that data is flushed */ error = xfs_swap_extents_check_format(ip, tip); if (error) { xfs_notice(mp, "%s: inode 0x%llx format is incompatible for exchanging.", __func__, ip->i_ino); goto out_unlock; } /* * Compare the current change & modify times with that * passed in. If they differ, we abort this swap. * This is the mechanism used to ensure the calling * process that the file was not changed out from * under it. */ if ((sbp->bs_ctime.tv_sec != VFS_I(ip)->i_ctime.tv_sec) || (sbp->bs_ctime.tv_nsec != VFS_I(ip)->i_ctime.tv_nsec) || (sbp->bs_mtime.tv_sec != VFS_I(ip)->i_mtime.tv_sec) || (sbp->bs_mtime.tv_nsec != VFS_I(ip)->i_mtime.tv_nsec)) { error = XFS_ERROR(EBUSY); goto out_unlock; } /* We need to fail if the file is memory mapped. Once we have tossed * all existing pages, the page fault will have no option * but to go to the filesystem for pages. By making the page fault call * vop_read (or write in the case of autogrow) they block on the iolock * until we have switched the extents. */ if (VN_MAPPED(VFS_I(ip))) { error = XFS_ERROR(EBUSY); goto out_unlock; } xfs_iunlock(ip, XFS_ILOCK_EXCL); xfs_iunlock(tip, XFS_ILOCK_EXCL); /* * There is a race condition here since we gave up the * ilock. However, the data fork will not change since * we have the iolock (locked for truncation too) so we * are safe. We don't really care if non-io related * fields change. */ truncate_pagecache_range(VFS_I(ip), 0, -1); tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT); error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); if (error) { xfs_iunlock(ip, XFS_IOLOCK_EXCL); xfs_iunlock(tip, XFS_IOLOCK_EXCL); xfs_trans_cancel(tp, 0); goto out; } xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL); /* * Count the number of extended attribute blocks */ if ( ((XFS_IFORK_Q(ip) != 0) && (ip->i_d.di_anextents > 0)) && (ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) { error = xfs_bmap_count_blocks(tp, ip, XFS_ATTR_FORK, &aforkblks); if (error) goto out_trans_cancel; } if ( ((XFS_IFORK_Q(tip) != 0) && (tip->i_d.di_anextents > 0)) && (tip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) { error = xfs_bmap_count_blocks(tp, tip, XFS_ATTR_FORK, &taforkblks); if (error) goto out_trans_cancel; } xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); xfs_trans_ijoin(tp, tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); /* * Before we've swapped the forks, lets set the owners of the forks * appropriately. We have to do this as we are demand paging the btree * buffers, and so the validation done on read will expect the owner * field to be correctly set. Once we change the owners, we can swap the * inode forks. * * Note the trickiness in setting the log flags - we set the owner log * flag on the opposite inode (i.e. the inode we are setting the new * owner to be) because once we swap the forks and log that, log * recovery is going to see the fork as owned by the swapped inode, * not the pre-swapped inodes. */ src_log_flags = XFS_ILOG_CORE; target_log_flags = XFS_ILOG_CORE; if (ip->i_d.di_version == 3 && ip->i_d.di_format == XFS_DINODE_FMT_BTREE) { target_log_flags |= XFS_ILOG_DOWNER; error = xfs_bmbt_change_owner(tp, ip, XFS_DATA_FORK, tip->i_ino, NULL); if (error) goto out_trans_cancel; } if (tip->i_d.di_version == 3 && tip->i_d.di_format == XFS_DINODE_FMT_BTREE) { src_log_flags |= XFS_ILOG_DOWNER; error = xfs_bmbt_change_owner(tp, tip, XFS_DATA_FORK, ip->i_ino, NULL); if (error) goto out_trans_cancel; } /* * Swap the data forks of the inodes */ ifp = &ip->i_df; tifp = &tip->i_df; *tempifp = *ifp; /* struct copy */ *ifp = *tifp; /* struct copy */ *tifp = *tempifp; /* struct copy */ /* * Fix the on-disk inode values */ tmp = (__uint64_t)ip->i_d.di_nblocks; ip->i_d.di_nblocks = tip->i_d.di_nblocks - taforkblks + aforkblks; tip->i_d.di_nblocks = tmp + taforkblks - aforkblks; tmp = (__uint64_t) ip->i_d.di_nextents; ip->i_d.di_nextents = tip->i_d.di_nextents; tip->i_d.di_nextents = tmp; tmp = (__uint64_t) ip->i_d.di_format; ip->i_d.di_format = tip->i_d.di_format; tip->i_d.di_format = tmp; /* * The extents in the source inode could still contain speculative * preallocation beyond EOF (e.g. the file is open but not modified * while defrag is in progress). In that case, we need to copy over the * number of delalloc blocks the data fork in the source inode is * tracking beyond EOF so that when the fork is truncated away when the * temporary inode is unlinked we don't underrun the i_delayed_blks * counter on that inode. */ ASSERT(tip->i_delayed_blks == 0); tip->i_delayed_blks = ip->i_delayed_blks; ip->i_delayed_blks = 0; switch (ip->i_d.di_format) { case XFS_DINODE_FMT_EXTENTS: /* If the extents fit in the inode, fix the * pointer. Otherwise it's already NULL or * pointing to the extent. */ if (ip->i_d.di_nextents <= XFS_INLINE_EXTS) { ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; } src_log_flags |= XFS_ILOG_DEXT; break; case XFS_DINODE_FMT_BTREE: ASSERT(ip->i_d.di_version < 3 || (src_log_flags & XFS_ILOG_DOWNER)); src_log_flags |= XFS_ILOG_DBROOT; break; } switch (tip->i_d.di_format) { case XFS_DINODE_FMT_EXTENTS: /* If the extents fit in the inode, fix the * pointer. Otherwise it's already NULL or * pointing to the extent. */ if (tip->i_d.di_nextents <= XFS_INLINE_EXTS) { tifp->if_u1.if_extents = tifp->if_u2.if_inline_ext; } target_log_flags |= XFS_ILOG_DEXT; break; case XFS_DINODE_FMT_BTREE: target_log_flags |= XFS_ILOG_DBROOT; ASSERT(tip->i_d.di_version < 3 || (target_log_flags & XFS_ILOG_DOWNER)); break; } xfs_trans_log_inode(tp, ip, src_log_flags); xfs_trans_log_inode(tp, tip, target_log_flags); /* * If this is a synchronous mount, make sure that the * transaction goes to disk before returning to the user. */ if (mp->m_flags & XFS_MOUNT_WSYNC) xfs_trans_set_sync(tp); error = xfs_trans_commit(tp, 0); trace_xfs_swap_extent_after(ip, 0); trace_xfs_swap_extent_after(tip, 1); out: kmem_free(tempifp); return error; out_unlock: xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); xfs_iunlock(tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); goto out; out_trans_cancel: xfs_trans_cancel(tp, 0); goto out_unlock; }
/* * Prepare two files for range cloning. Upon a successful return both inodes * will have the iolock and mmaplock held, the page cache of the out file will * be truncated, and any leases on the out file will have been broken. This * function borrows heavily from xfs_file_aio_write_checks. * * The VFS allows partial EOF blocks to "match" for dedupe even though it hasn't * checked that the bytes beyond EOF physically match. Hence we cannot use the * EOF block in the source dedupe range because it's not a complete block match, * hence can introduce a corruption into the file that has it's block replaced. * * In similar fashion, the VFS file cloning also allows partial EOF blocks to be * "block aligned" for the purposes of cloning entire files. However, if the * source file range includes the EOF block and it lands within the existing EOF * of the destination file, then we can expose stale data from beyond the source * file EOF in the destination file. * * XFS doesn't support partial block sharing, so in both cases we have check * these cases ourselves. For dedupe, we can simply round the length to dedupe * down to the previous whole block and ignore the partial EOF block. While this * means we can't dedupe the last block of a file, this is an acceptible * tradeoff for simplicity on implementation. * * For cloning, we want to share the partial EOF block if it is also the new EOF * block of the destination file. If the partial EOF block lies inside the * existing destination EOF, then we have to abort the clone to avoid exposing * stale data in the destination file. Hence we reject these clone attempts with * -EINVAL in this case. */ int xfs_reflink_remap_prep( struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, loff_t *len, unsigned int remap_flags) { struct inode *inode_in = file_inode(file_in); struct xfs_inode *src = XFS_I(inode_in); struct inode *inode_out = file_inode(file_out); struct xfs_inode *dest = XFS_I(inode_out); bool same_inode = (inode_in == inode_out); ssize_t ret; /* Lock both files against IO */ ret = xfs_iolock_two_inodes_and_break_layout(inode_in, inode_out); if (ret) return ret; if (same_inode) xfs_ilock(src, XFS_MMAPLOCK_EXCL); else xfs_lock_two_inodes(src, XFS_MMAPLOCK_SHARED, dest, XFS_MMAPLOCK_EXCL); /* Check file eligibility and prepare for block sharing. */ ret = -EINVAL; /* Don't reflink realtime inodes */ if (XFS_IS_REALTIME_INODE(src) || XFS_IS_REALTIME_INODE(dest)) goto out_unlock; /* Don't share DAX file data for now. */ if (IS_DAX(inode_in) || IS_DAX(inode_out)) goto out_unlock; ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out, len, remap_flags); if (ret < 0 || *len == 0) goto out_unlock; /* Attach dquots to dest inode before changing block map */ ret = xfs_qm_dqattach(dest); if (ret) goto out_unlock; /* * Zero existing post-eof speculative preallocations in the destination * file. */ ret = xfs_reflink_zero_posteof(dest, pos_out); if (ret) goto out_unlock; /* Set flags and remap blocks. */ ret = xfs_reflink_set_inode_flag(src, dest); if (ret) goto out_unlock; /* * If pos_out > EOF, we may have dirtied blocks between EOF and * pos_out. In that case, we need to extend the flush and unmap to cover * from EOF to the end of the copy length. */ if (pos_out > XFS_ISIZE(dest)) { loff_t flen = *len + (pos_out - XFS_ISIZE(dest)); ret = xfs_flush_unmap_range(dest, XFS_ISIZE(dest), flen); } else { ret = xfs_flush_unmap_range(dest, pos_out, *len); } if (ret) goto out_unlock; return 1; out_unlock: xfs_reflink_remap_unlock(file_in, file_out); return ret; }
/* * Link a range of blocks from one file to another. */ int xfs_reflink_remap_range( struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, u64 len, bool is_dedupe) { struct inode *inode_in = file_inode(file_in); struct xfs_inode *src = XFS_I(inode_in); struct inode *inode_out = file_inode(file_out); struct xfs_inode *dest = XFS_I(inode_out); struct xfs_mount *mp = src->i_mount; bool same_inode = (inode_in == inode_out); xfs_fileoff_t sfsbno, dfsbno; xfs_filblks_t fsblen; xfs_extlen_t cowextsize; ssize_t ret; if (!xfs_sb_version_hasreflink(&mp->m_sb)) return -EOPNOTSUPP; if (XFS_FORCED_SHUTDOWN(mp)) return -EIO; /* Lock both files against IO */ lock_two_nondirectories(inode_in, inode_out); if (same_inode) xfs_ilock(src, XFS_MMAPLOCK_EXCL); else xfs_lock_two_inodes(src, dest, XFS_MMAPLOCK_EXCL); /* Check file eligibility and prepare for block sharing. */ ret = -EINVAL; /* Don't reflink realtime inodes */ if (XFS_IS_REALTIME_INODE(src) || XFS_IS_REALTIME_INODE(dest)) goto out_unlock; /* Don't share DAX file data for now. */ if (IS_DAX(inode_in) || IS_DAX(inode_out)) goto out_unlock; ret = vfs_clone_file_prep_inodes(inode_in, pos_in, inode_out, pos_out, &len, is_dedupe); if (ret <= 0) goto out_unlock; trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out); /* Set flags and remap blocks. */ ret = xfs_reflink_set_inode_flag(src, dest); if (ret) goto out_unlock; dfsbno = XFS_B_TO_FSBT(mp, pos_out); sfsbno = XFS_B_TO_FSBT(mp, pos_in); fsblen = XFS_B_TO_FSB(mp, len); ret = xfs_reflink_remap_blocks(src, sfsbno, dest, dfsbno, fsblen, pos_out + len); if (ret) goto out_unlock; /* Zap any page cache for the destination file's range. */ truncate_inode_pages_range(&inode_out->i_data, pos_out, PAGE_ALIGN(pos_out + len) - 1); /* * Carry the cowextsize hint from src to dest if we're sharing the * entire source file to the entire destination file, the source file * has a cowextsize hint, and the destination file does not. */ cowextsize = 0; if (pos_in == 0 && len == i_size_read(inode_in) && (src->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE) && pos_out == 0 && len >= i_size_read(inode_out) && !(dest->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) cowextsize = src->i_d.di_cowextsize; ret = xfs_reflink_update_dest(dest, pos_out + len, cowextsize, is_dedupe); out_unlock: xfs_iunlock(src, XFS_MMAPLOCK_EXCL); if (!same_inode) xfs_iunlock(dest, XFS_MMAPLOCK_EXCL); unlock_two_nondirectories(inode_in, inode_out); if (ret) trace_xfs_reflink_remap_range_error(dest, ret, _RET_IP_); return ret; }
int xfs_swap_extents( xfs_inode_t *ip, /* target inode */ xfs_inode_t *tip, /* tmp inode */ xfs_swapext_t *sxp) { xfs_mount_t *mp; xfs_trans_t *tp; xfs_bstat_t *sbp = &sxp->sx_stat; xfs_ifork_t *tempifp, *ifp, *tifp; int ilf_fields, tilf_fields; static uint lock_flags = XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL; int error = 0; int aforkblks = 0; int taforkblks = 0; __uint64_t tmp; char locked = 0; mp = ip->i_mount; tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL); if (!tempifp) { error = XFS_ERROR(ENOMEM); goto error0; } sbp = &sxp->sx_stat; /* * we have to do two separate lock calls here to keep lockdep * happy. If we try to get all the locks in one call, lock will * report false positives when we drop the ILOCK and regain them * below. */ xfs_lock_two_inodes(ip, tip, XFS_IOLOCK_EXCL); xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL); locked = 1; /* Verify that both files have the same format */ if ((ip->i_d.di_mode & S_IFMT) != (tip->i_d.di_mode & S_IFMT)) { error = XFS_ERROR(EINVAL); goto error0; } /* Verify both files are either real-time or non-realtime */ if (XFS_IS_REALTIME_INODE(ip) != XFS_IS_REALTIME_INODE(tip)) { error = XFS_ERROR(EINVAL); goto error0; } if (VN_CACHED(VFS_I(tip)) != 0) { xfs_inval_cached_trace(tip, 0, -1, 0, -1); error = xfs_flushinval_pages(tip, 0, -1, FI_REMAPF_LOCKED); if (error) goto error0; } /* Verify O_DIRECT for ftmp */ if (VN_CACHED(VFS_I(tip)) != 0) { error = XFS_ERROR(EINVAL); goto error0; } /* Verify all data are being swapped */ if (sxp->sx_offset != 0 || sxp->sx_length != ip->i_d.di_size || sxp->sx_length != tip->i_d.di_size) { error = XFS_ERROR(EFAULT); goto error0; } /* check inode formats now that data is flushed */ error = xfs_swap_extents_check_format(ip, tip); if (error) { xfs_fs_cmn_err(CE_NOTE, mp, "%s: inode 0x%llx format is incompatible for exchanging.", __FILE__, ip->i_ino); goto error0; } /* * Compare the current change & modify times with that * passed in. If they differ, we abort this swap. * This is the mechanism used to ensure the calling * process that the file was not changed out from * under it. */ if ((sbp->bs_ctime.tv_sec != ip->i_d.di_ctime.t_sec) || (sbp->bs_ctime.tv_nsec != ip->i_d.di_ctime.t_nsec) || (sbp->bs_mtime.tv_sec != ip->i_d.di_mtime.t_sec) || (sbp->bs_mtime.tv_nsec != ip->i_d.di_mtime.t_nsec)) { error = XFS_ERROR(EBUSY); goto error0; } /* We need to fail if the file is memory mapped. Once we have tossed * all existing pages, the page fault will have no option * but to go to the filesystem for pages. By making the page fault call * vop_read (or write in the case of autogrow) they block on the iolock * until we have switched the extents. */ if (VN_MAPPED(VFS_I(ip))) { error = XFS_ERROR(EBUSY); goto error0; } xfs_iunlock(ip, XFS_ILOCK_EXCL); xfs_iunlock(tip, XFS_ILOCK_EXCL); /* * There is a race condition here since we gave up the * ilock. However, the data fork will not change since * we have the iolock (locked for truncation too) so we * are safe. We don't really care if non-io related * fields change. */ xfs_tosspages(ip, 0, -1, FI_REMAPF); tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT); if ((error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0))) { xfs_iunlock(ip, XFS_IOLOCK_EXCL); xfs_iunlock(tip, XFS_IOLOCK_EXCL); xfs_trans_cancel(tp, 0); locked = 0; goto error0; } xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL); /* * Count the number of extended attribute blocks */ if ( ((XFS_IFORK_Q(ip) != 0) && (ip->i_d.di_anextents > 0)) && (ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) { error = xfs_bmap_count_blocks(tp, ip, XFS_ATTR_FORK, &aforkblks); if (error) { xfs_trans_cancel(tp, 0); goto error0; } } if ( ((XFS_IFORK_Q(tip) != 0) && (tip->i_d.di_anextents > 0)) && (tip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) { error = xfs_bmap_count_blocks(tp, tip, XFS_ATTR_FORK, &taforkblks); if (error) { xfs_trans_cancel(tp, 0); goto error0; } } /* * Swap the data forks of the inodes */ ifp = &ip->i_df; tifp = &tip->i_df; *tempifp = *ifp; /* struct copy */ *ifp = *tifp; /* struct copy */ *tifp = *tempifp; /* struct copy */ /* * Fix the in-memory data fork values that are dependent on the fork * offset in the inode. We can't assume they remain the same as attr2 * has dynamic fork offsets. */ ifp->if_ext_max = XFS_IFORK_SIZE(ip, XFS_DATA_FORK) / (uint)sizeof(xfs_bmbt_rec_t); tifp->if_ext_max = XFS_IFORK_SIZE(tip, XFS_DATA_FORK) / (uint)sizeof(xfs_bmbt_rec_t); /* * Fix the on-disk inode values */ tmp = (__uint64_t)ip->i_d.di_nblocks; ip->i_d.di_nblocks = tip->i_d.di_nblocks - taforkblks + aforkblks; tip->i_d.di_nblocks = tmp + taforkblks - aforkblks; tmp = (__uint64_t) ip->i_d.di_nextents; ip->i_d.di_nextents = tip->i_d.di_nextents; tip->i_d.di_nextents = tmp; tmp = (__uint64_t) ip->i_d.di_format; ip->i_d.di_format = tip->i_d.di_format; tip->i_d.di_format = tmp; ilf_fields = XFS_ILOG_CORE; switch(ip->i_d.di_format) { case XFS_DINODE_FMT_EXTENTS: /* If the extents fit in the inode, fix the * pointer. Otherwise it's already NULL or * pointing to the extent. */ if (ip->i_d.di_nextents <= XFS_INLINE_EXTS) { ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; } ilf_fields |= XFS_ILOG_DEXT; break; case XFS_DINODE_FMT_BTREE: ilf_fields |= XFS_ILOG_DBROOT; break; } tilf_fields = XFS_ILOG_CORE; switch(tip->i_d.di_format) { case XFS_DINODE_FMT_EXTENTS: /* If the extents fit in the inode, fix the * pointer. Otherwise it's already NULL or * pointing to the extent. */ if (tip->i_d.di_nextents <= XFS_INLINE_EXTS) { tifp->if_u1.if_extents = tifp->if_u2.if_inline_ext; } tilf_fields |= XFS_ILOG_DEXT; break; case XFS_DINODE_FMT_BTREE: tilf_fields |= XFS_ILOG_DBROOT; break; } IHOLD(ip); xfs_trans_ijoin(tp, ip, lock_flags); IHOLD(tip); xfs_trans_ijoin(tp, tip, lock_flags); xfs_trans_log_inode(tp, ip, ilf_fields); xfs_trans_log_inode(tp, tip, tilf_fields); /* * If this is a synchronous mount, make sure that the * transaction goes to disk before returning to the user. */ if (mp->m_flags & XFS_MOUNT_WSYNC) { xfs_trans_set_sync(tp); } error = xfs_trans_commit(tp, XFS_TRANS_SWAPEXT); locked = 0; error0: if (locked) { xfs_iunlock(ip, lock_flags); xfs_iunlock(tip, lock_flags); } if (tempifp != NULL) kmem_free(tempifp); return error; }