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ceph: just use ci->i_version for fscache aux info

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If the i_version regresses, then it's likely that the mtime will do the
same in lockstep with it. There's no need to track both here, just use
the i_version counter since it's just as good and gets the aux size down
to 64 bits.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Jeff Layton 2021-05-05 15:21:12 -04:00 committed by Ilya Dryomov
parent 5d6451b148
commit 25b7351161
1 changed files with 3 additions and 20 deletions
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23
fs/ceph/cache.c
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@ -12,12 +12,6 @@
#include "super.h"
#include "cache.h"
struct ceph_aux_inode {
u64 version;
u64 mtime_sec;
u64 mtime_nsec;
};
struct fscache_netfs ceph_cache_netfs = {
.name = "ceph",
.version = 0,
@ -109,20 +103,14 @@ static enum fscache_checkaux ceph_fscache_inode_check_aux(
void *cookie_netfs_data, const void *data, uint16_t dlen,
loff_t object_size)
{
struct ceph_aux_inode aux;
struct ceph_inode_info* ci = cookie_netfs_data;
struct inode* inode = &ci->vfs_inode;
if (dlen != sizeof(aux) ||
if (dlen != sizeof(ci->i_version) ||
i_size_read(inode) != object_size)
return FSCACHE_CHECKAUX_OBSOLETE;
memset(&aux, 0, sizeof(aux));
aux.version = ci->i_version;
aux.mtime_sec = inode->i_mtime.tv_sec;
aux.mtime_nsec = inode->i_mtime.tv_nsec;
if (memcmp(data, &aux, sizeof(aux)) != 0)
if (*(u64 *)data != ci->i_version)
return FSCACHE_CHECKAUX_OBSOLETE;
dout("ceph inode 0x%p cached okay\n", ci);
@ -139,7 +127,6 @@ void ceph_fscache_register_inode_cookie(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
struct ceph_aux_inode aux;
/* No caching for filesystem */
if (!fsc->fscache)
@ -151,14 +138,10 @@ void ceph_fscache_register_inode_cookie(struct inode *inode)
inode_lock_nested(inode, I_MUTEX_CHILD);
if (!ci->fscache) {
memset(&aux, 0, sizeof(aux));
aux.version = ci->i_version;
aux.mtime_sec = inode->i_mtime.tv_sec;
aux.mtime_nsec = inode->i_mtime.tv_nsec;
ci->fscache = fscache_acquire_cookie(fsc->fscache,
&ceph_fscache_inode_object_def,
&ci->i_vino, sizeof(ci->i_vino),
&aux, sizeof(aux),
&ci->i_version, sizeof(ci->i_version),
ci, i_size_read(inode), false);
}
inode_unlock(inode);