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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-04-17 23:37:34 +07:00
f5b8911b67
It's a buggy, unnecessary wrapper that is duplicating truncate_pagecache_range(). When replacing the call in xfs_change_file_space(), also ensure that the length being allocated/freed is always positive before making any changes. These checks are done in the lower extent manipulation functions, too, but we need to do them before any page cache operations. Reported-by: Andrew Dahl <adahl@sgi.com> Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-By: Andrew Dahl <adahl@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/*
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* Copyright (c) 2000-2002,2005-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_vnodeops.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_inode.h"
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#include "xfs_trace.h"
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/*
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* note: all filemap functions return negative error codes. These
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* need to be inverted before returning to the xfs core functions.
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*/
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int
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xfs_flushinval_pages(
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xfs_inode_t *ip,
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xfs_off_t first,
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xfs_off_t last,
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int fiopt)
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{
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struct address_space *mapping = VFS_I(ip)->i_mapping;
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int ret = 0;
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trace_xfs_pagecache_inval(ip, first, last);
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xfs_iflags_clear(ip, XFS_ITRUNCATED);
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ret = filemap_write_and_wait_range(mapping, first,
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last == -1 ? LLONG_MAX : last);
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if (!ret)
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truncate_inode_pages_range(mapping, first, last);
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return -ret;
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}
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int
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xfs_flush_pages(
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xfs_inode_t *ip,
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xfs_off_t first,
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xfs_off_t last,
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uint64_t flags,
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int fiopt)
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{
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struct address_space *mapping = VFS_I(ip)->i_mapping;
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int ret = 0;
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int ret2;
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xfs_iflags_clear(ip, XFS_ITRUNCATED);
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ret = -filemap_fdatawrite_range(mapping, first,
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last == -1 ? LLONG_MAX : last);
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if (flags & XBF_ASYNC)
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return ret;
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ret2 = xfs_wait_on_pages(ip, first, last);
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if (!ret)
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ret = ret2;
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return ret;
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}
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int
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xfs_wait_on_pages(
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xfs_inode_t *ip,
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xfs_off_t first,
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xfs_off_t last)
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{
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struct address_space *mapping = VFS_I(ip)->i_mapping;
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if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK)) {
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return -filemap_fdatawait_range(mapping, first,
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last == -1 ? XFS_ISIZE(ip) - 1 : last);
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}
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return 0;
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}
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