From bc35b6b0cf4a83da5015ae8f1aa072a05586ee84 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 11 Nov 2019 21:16:25 +0100 Subject: [PATCH] nfs: fscache: use timespec64 in inode auxdata nfs currently behaves differently on 32-bit and 64-bit kernels regarding the on-disk format of nfs_fscache_inode_auxdata. That format should really be the same on any kernel, and we should avoid the 'timespec' type in order to remove that from the kernel later on. Using plain 'timespec64' would not be good here, since that includes implied padding and would possibly leak kernel stack data to the on-disk format on 32-bit architectures. struct __kernel_timespec would work as a replacement, but open-coding the two struct members in nfs_fscache_inode_auxdata makes it more obvious what's going on here, and keeps the current format for 64-bit architectures. Cc: David Howells Signed-off-by: Arnd Bergmann Signed-off-by: Anna Schumaker --- fs/nfs/fscache-index.c | 6 ++++-- fs/nfs/fscache.c | 18 ++++++++++++------ fs/nfs/fscache.h | 8 +++++--- 3 files changed, 21 insertions(+), 11 deletions(-) diff --git a/fs/nfs/fscache-index.c b/fs/nfs/fscache-index.c index 15f271401dcc..573b1da9342c 100644 --- a/fs/nfs/fscache-index.c +++ b/fs/nfs/fscache-index.c @@ -84,8 +84,10 @@ enum fscache_checkaux nfs_fscache_inode_check_aux(void *cookie_netfs_data, return FSCACHE_CHECKAUX_OBSOLETE; memset(&auxdata, 0, sizeof(auxdata)); - auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); - auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); + auxdata.mtime_sec = nfsi->vfs_inode.i_mtime.tv_sec; + auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec; + auxdata.ctime_sec = nfsi->vfs_inode.i_ctime.tv_sec; + auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec; if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4) auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode); diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index 4a8df8c30a03..52270bfac120 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -238,8 +238,10 @@ void nfs_fscache_init_inode(struct inode *inode) return; memset(&auxdata, 0, sizeof(auxdata)); - auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); - auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); + auxdata.mtime_sec = nfsi->vfs_inode.i_mtime.tv_sec; + auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec; + auxdata.ctime_sec = nfsi->vfs_inode.i_ctime.tv_sec; + auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec; if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4) auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode); @@ -263,8 +265,10 @@ void nfs_fscache_clear_inode(struct inode *inode) dfprintk(FSCACHE, "NFS: clear cookie (0x%p/0x%p)\n", nfsi, cookie); memset(&auxdata, 0, sizeof(auxdata)); - auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); - auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); + auxdata.mtime_sec = nfsi->vfs_inode.i_mtime.tv_sec; + auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec; + auxdata.ctime_sec = nfsi->vfs_inode.i_ctime.tv_sec; + auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec; fscache_relinquish_cookie(cookie, &auxdata, false); nfsi->fscache = NULL; } @@ -305,8 +309,10 @@ void nfs_fscache_open_file(struct inode *inode, struct file *filp) return; memset(&auxdata, 0, sizeof(auxdata)); - auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); - auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); + auxdata.mtime_sec = nfsi->vfs_inode.i_mtime.tv_sec; + auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec; + auxdata.ctime_sec = nfsi->vfs_inode.i_ctime.tv_sec; + auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec; if (inode_is_open_for_write(inode)) { dfprintk(FSCACHE, "NFS: nfsi 0x%p disabling cache\n", nfsi); diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index ad041cfbf9ec..6754c8607230 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -62,9 +62,11 @@ struct nfs_fscache_key { * cache object. */ struct nfs_fscache_inode_auxdata { - struct timespec mtime; - struct timespec ctime; - u64 change_attr; + s64 mtime_sec; + s64 mtime_nsec; + s64 ctime_sec; + s64 ctime_nsec; + u64 change_attr; }; /*