[PATCH v1 08/10] NFS: Reset pagecache cursor on llseek
From: Benjamin Coddington <hidden>
Date: 2021-01-20 17:05:26
Subsystem:
filesystems (vfs and infrastructure), nfs, sunrpc, and lockd clients, the rest · Maintainers:
Alexander Viro, Christian Brauner, Trond Myklebust, Anna Schumaker, Linus Torvalds
Unless we reset the cursor, a series of lseek() getdents() calls will continue filling the pagecache indefinitely. Instead, reset the cursor so that we always start filling at the beginning of the pagecache. Signed-off-by: Benjamin Coddington <redacted> --- fs/nfs/dir.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index d6101e45fd66..7ca79d4b25ec 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c@@ -1284,6 +1284,8 @@ static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int whence) dir_ctx->pgc.index_cookie = offset; else dir_ctx->pgc.index_cookie = 0; + dir_ctx->pgc.page_index = 0; + dir_ctx->pgc.entry_index = 0; if (offset == 0) memset(dir_ctx->verf, 0, sizeof(dir_ctx->verf)); dir_ctx->duped = 0;
--
2.25.4