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fuse: always revalidate rename target dentry

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commit ccc031e26afe60d2a5a3d93dabd9c978210825fb upstream.

The previous commit df8629af29 ("fuse: always revalidate if exclusive
create") ensures that the dentries are revalidated on O_EXCL creates.  This
commit complements it by also performing revalidation for rename target
dentries.  Otherwise, a rename target file that only exists in kernel
dentry cache but not in the filesystem will result in EEXIST if
RENAME_NOREPLACE flag is used.

Signed-off-by: Jiachen Zhang <zhangjiachen.jaycee@bytedance.com>
Signed-off-by: Zhang Tianci <zhangtianci.1997@bytedance.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Yang Bo <yb203166@antfin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiachen Zhang 2022-09-28 20:19:34 +08:00 • committed by Greg Kroah-Hartman
parent f9a20ef5e8
commit 7ca973d830
1 changed files with 1 additions and 1 deletions
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2
fs/fuse/dir.c
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@ -214,7 +214,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags)
if (inode && fuse_is_bad(inode))
goto invalid;
else if (time_before64(fuse_dentry_time(entry), get_jiffies_64()) ||
(flags & (LOOKUP_EXCL | LOOKUP_REVAL))) {
(flags & (LOOKUP_EXCL | LOOKUP_REVAL | LOOKUP_RENAME_TARGET))) {
struct fuse_entry_out outarg;
FUSE_ARGS(args);
struct fuse_forget_link *forget;