pstore: fix pstore filesystem mount/remount issue
Currently after mount/remount operation on pstore filesystem,
the content on pstore will be lost. It is because current ERST
implementation doesn't support multi-user usage, which moves
internal pointer to the end after accessing it. Adding
multi-user support for pstore usage.
Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 912403c..f2c3ff2 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -156,17 +156,23 @@
u64 id;
enum pstore_type_id type;
struct timespec time;
- int failed = 0;
+ int failed = 0, rc;
if (!psi)
return;
mutex_lock(&psinfo->buf_mutex);
+ rc = psi->open(psi);
+ if (rc)
+ goto out;
+
while ((size = psi->read(&id, &type, &time)) > 0) {
if (pstore_mkfile(type, psi->name, id, psi->buf, (size_t)size,
time, psi->erase))
failed++;
}
+ psi->close(psi);
+out:
mutex_unlock(&psinfo->buf_mutex);
if (failed)