cifs: use 64-bit timestamps for fscache

In the fscache, we just need the timestamps as cookies to check for
changes, so we don't really care about the overflow, but it's better
to stop using the deprecated timespec so we don't have to go through
explicit conversion functions.

To avoid comparing uninitialized padding values that are copied
while assigning the timespec values, this rearranges the members of
cifs_fscache_inode_auxdata to avoid padding, and assigns them
individually.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Paulo Alcantara <palcantara@suse.de>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c
index e1553d1..b7420e6 100644 (file)
--- a/fs/cifs/cache.c
+++ b/fs/cifs/cache.c
@@ -128,8 +128,10 @@ fscache_checkaux cifs_fscache_inode_check_aux(void *cookie_netfs_data,
 
        memset(&auxdata, 0, sizeof(auxdata));
        auxdata.eof = cifsi->server_eof;
-       auxdata.last_write_time = timespec64_to_timespec(cifsi->vfs_inode.i_mtime);
-       auxdata.last_change_time = timespec64_to_timespec(cifsi->vfs_inode.i_ctime);
+       auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
+       auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
+       auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
+       auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
 
        if (memcmp(data, &auxdata, datalen) != 0)
                return FSCACHE_CHECKAUX_OBSOLETE;

diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c
index 85145a7..ea6ace9 100644 (file)
--- a/fs/cifs/fscache.c
+++ b/fs/cifs/fscache.c
@@ -129,8 +129,10 @@ static void cifs_fscache_acquire_inode_cookie(struct cifsInodeInfo *cifsi,
 
        memset(&auxdata, 0, sizeof(auxdata));
        auxdata.eof = cifsi->server_eof;
-       auxdata.last_write_time = timespec64_to_timespec(cifsi->vfs_inode.i_mtime);
-       auxdata.last_change_time = timespec64_to_timespec(cifsi->vfs_inode.i_ctime);
+       auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
+       auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
+       auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
+       auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
 
        cifsi->fscache =
                fscache_acquire_cookie(tcon->fscache,
@@ -166,8 +168,10 @@ void cifs_fscache_release_inode_cookie(struct inode *inode)
        if (cifsi->fscache) {
                memset(&auxdata, 0, sizeof(auxdata));
                auxdata.eof = cifsi->server_eof;
-               auxdata.last_write_time = timespec64_to_timespec(cifsi->vfs_inode.i_mtime);
-               auxdata.last_change_time = timespec64_to_timespec(cifsi->vfs_inode.i_ctime);
+               auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
+               auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
+               auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
+               auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
 
                cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
                fscache_relinquish_cookie(cifsi->fscache, &auxdata, false);

diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h
index c7e3ac2..8c0862e 100644 (file)
--- a/fs/cifs/fscache.h
+++ b/fs/cifs/fscache.h
@@ -31,9 +31,11 @@
  * Auxiliary data attached to CIFS inode within the cache
  */
 struct cifs_fscache_inode_auxdata {
-       struct timespec last_write_time;
-       struct timespec last_change_time;
-       u64             eof;
+       u64 last_write_time_sec;
+       u64 last_change_time_sec;
+       u32 last_write_time_nsec;
+       u32 last_change_time_nsec;
+       u64 eof;
 };
 
 /*