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NFS: nfs_invalidate_folio() must observe the offset and size arguments 

[ Upstream commit b7b8574225 ]

If we're truncating part of the folio, then we need to write out the
data on the part that is not covered by the cancellation.

Fixes: d47992f86b ("mm: change invalidatepage prototype to accept length")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Trond Myklebust 2025-09-03 11:48:57 -04:00 committed by Greg Kroah-Hartman
parent e1651ba799
commit b7c6c76c85
2 changed files with 5 additions and 3 deletions
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5
fs/nfs/file.c
View File

@ -437,9 +437,10 @@ static void nfs_invalidate_folio(struct folio *folio, size_t offset,
dfprintk(PAGECACHE, "NFS: invalidate_folio(%lu, %zu, %zu)\n",
folio->index, offset, length);
if (offset != 0 || length < folio_size(folio))
return;
/* Cancel any unstarted writes on this page */
if (offset != 0 || length < folio_size(folio))
nfs_wb_folio(inode, folio);
else
nfs_wb_folio_cancel(inode, folio);
folio_wait_private_2(folio); /* [DEPRECATED] */
trace_nfs_invalidate_folio(inode, folio_pos(folio) + offset, length);

1
fs/nfs/write.c
View File

@ -2058,6 +2058,7 @@ int nfs_wb_folio_cancel(struct inode *inode, struct folio *folio)
* release it */
nfs_inode_remove_request(req);
nfs_unlock_and_release_request(req);
folio_cancel_dirty(folio);
}
return ret;