fscache_acquire_cache() requires a non-empty name, while 'tag <name>'
command is optional for cachefilesd.
Thus set default tag name if it's unspecified to avoid the regression of
cachefilesd. The logic is the same with that before rewritten.
Signed-off-by: Jeffle Xu <jefflexu@xxxxxxxxxxxxxxxxx>
---
fs/cachefiles/daemon.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/fs/cachefiles/daemon.c b/fs/cachefiles/daemon.c
index 0c629dea9b5e..847781f031b0 100644
--- a/fs/cachefiles/daemon.c
+++ b/fs/cachefiles/daemon.c
@@ -720,6 +720,17 @@ static int cachefiles_daemon_bind(struct cachefiles_cache *cache, char *args)
return -EBUSY;
}
+ /* Make sure we have copies of the tag string */
+ if (!cache->tag) {
+ /*
+ * The tag string is released by the fops->release()
+ * function, so we don't release it on error here
+ */
+ cache->tag = kstrdup("CacheFiles", GFP_KERNEL);
+ if (!cache->tag)
+ return -ENOMEM;
+ }
+
return cachefiles_add_cache(cache);
}
--
2.27.0
--
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