pstore: Introduce new argument 'compressed' in the read callback

Backends will set the flag 'compressed' after reading the log from
persistent store to indicate the data being returned to pstore is
compressed or not.

Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 5 insertions, 2 deletions

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 56218cb35267..6418eb77d64b 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -428,6 +428,7 @@ void pstore_get_records(int quiet)
         enum pstore_type_id     type;
         struct timespec         time;
         int                     failed = 0, rc;
+        bool                    compressed;
 
         if (!psi)
                 return;
@@ -436,7 +437,8 @@ void pstore_get_records(int quiet)
         if (psi->open && psi->open(psi))
                 goto out;
 
-        while ((size = psi->read(&id, &type, &count, &time, &buf, psi)) > 0) {
+        while ((size = psi->read(&id, &type, &count, &time, &buf, &compressed,
+                                psi)) > 0) {
                 rc = pstore_mkfile(type, psi->name, id, count, buf,
                                   (size_t)size, time, psi);
                 kfree(buf);
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index fe7188f742b7..292722327811 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -133,7 +133,8 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
 
 static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type,
                                    int *count, struct timespec *time,
-                                   char **buf, struct pstore_info *psi)
+                                   char **buf, bool *compressed,
+                                   struct pstore_info *psi)
 {
         ssize_t size;
         ssize_t ecc_notice_size;