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-rw-r--r--fs/overlayfs/copy_up.c38
1 files changed, 13 insertions, 25 deletions
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 15668d3bbbc4..0d9de353f42b 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -506,37 +506,18 @@ static int ovl_do_copy_up(struct ovl_copy_up_ctx *c)
/* Should we copyup with O_TMPFILE or with workdir? */
if (S_ISREG(c->stat.mode) && ofs->tmpfile) {
- err = ovl_copy_up_start(c->dentry);
- /* err < 0: interrupted, err > 0: raced with another copy-up */
- if (unlikely(err)) {
- pr_debug("ovl_copy_up_start(%pd2) = %i\n", c->dentry,
- err);
- if (err > 0)
- err = 0;
- goto out_done;
- }
c->tmpfile = true;
- err = ovl_copy_up_locked(c);
- ovl_copy_up_end(c->dentry);
- goto out_done;
+ return ovl_copy_up_locked(c);
}
err = -EIO;
if (lock_rename(c->workdir, c->upperdir) != NULL) {
pr_err("overlayfs: failed to lock workdir+upperdir\n");
- goto out_unlock;
- }
- if (ovl_dentry_upper(c->dentry)) {
- /* Raced with another copy-up? Nothing to do, then... */
- err = 0;
- goto out_unlock;
+ } else {
+ err = ovl_copy_up_locked(c);
+ unlock_rename(c->workdir, c->upperdir);
}
- err = ovl_copy_up_locked(c);
-out_unlock:
- unlock_rename(c->workdir, c->upperdir);
-out_done:
-
return err;
}
@@ -580,8 +561,15 @@ static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
}
ovl_do_check_copy_up(ctx.lowerpath.dentry);
- err = ovl_do_copy_up(&ctx);
-
+ err = ovl_copy_up_start(dentry);
+ /* err < 0: interrupted, err > 0: raced with another copy-up */
+ if (unlikely(err)) {
+ if (err > 0)
+ err = 0;
+ } else {
+ err = ovl_do_copy_up(&ctx);
+ ovl_copy_up_end(dentry);
+ }
do_delayed_call(&done);
return err;