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fscache: Pass object size in rather than calling back for it

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Pass the object size in to fscache_acquire_cookie() and
fscache_write_page() rather than the netfs providing a callback by which it
can be received.  This makes it easier to update the size of the object
when a new page is written that extends the object.

The current object size is also passed by fscache to the check_aux
function, obviating the need to store it in the aux data.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Anna Schumaker <anna.schumaker@netapp.com>
Tested-by: Steve Dickson <steved@redhat.com>
This commit is contained in:
David Howells
2018-04-04 13:41:28 +01:00
parent 402cb8dda9
commit ee1235a9a0
21 changed files with 127 additions and 166 deletions
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26
fs/ceph/cache.c
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@@ -27,7 +27,6 @@
struct ceph_aux_inode {
u64 version;
struct timespec mtime;
loff_t size;
};
struct fscache_netfs ceph_cache_netfs = {
@@ -101,7 +100,7 @@ int ceph_fscache_register_fs(struct ceph_fs_client* fsc)
&ceph_fscache_fsid_object_def,
&ent->fsid, sizeof(ent->fsid) + uniq_len,
NULL, 0,
fsc, true);
fsc, 0, true);
if (fsc->fscache) {
ent->fscache = fsc->fscache;
@@ -117,27 +116,21 @@ out_unlock:
return err;
}
static void ceph_fscache_inode_get_attr(const void *cookie_netfs_data,
uint64_t *size)
{
const struct ceph_inode_info* ci = cookie_netfs_data;
*size = i_size_read(&ci->vfs_inode);
}
static enum fscache_checkaux ceph_fscache_inode_check_aux(
void *cookie_netfs_data, const void *data, uint16_t dlen)
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(aux) ||
i_size_read(inode) != object_size)
return FSCACHE_CHECKAUX_OBSOLETE;
memset(&aux, 0, sizeof(aux));
aux.version = ci->i_version;
aux.mtime = inode->i_mtime;
aux.size = i_size_read(inode);
if (memcmp(data, &aux, sizeof(aux)) != 0)
return FSCACHE_CHECKAUX_OBSOLETE;
@@ -149,7 +142,6 @@ static enum fscache_checkaux ceph_fscache_inode_check_aux(
static const struct fscache_cookie_def ceph_fscache_inode_object_def = {
.name = "CEPH.inode",
.type = FSCACHE_COOKIE_TYPE_DATAFILE,
.get_attr = ceph_fscache_inode_get_attr,
.check_aux = ceph_fscache_inode_check_aux,
};
@@ -172,12 +164,11 @@ void ceph_fscache_register_inode_cookie(struct inode *inode)
memset(&aux, 0, sizeof(aux));
aux.version = ci->i_version;
aux.mtime = inode->i_mtime;
aux.size = i_size_read(inode);
ci->fscache = fscache_acquire_cookie(fsc->fscache,
&ceph_fscache_inode_object_def,
&ci->i_vino, sizeof(ci->i_vino),
&aux, sizeof(aux),
ci, false);
ci, i_size_read(inode), false);
}
inode_unlock(inode);
}
@@ -214,7 +205,7 @@ void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp)
fscache_disable_cookie(ci->fscache, &ci->i_vino, false);
fscache_uncache_all_inode_pages(ci->fscache, inode);
} else {
fscache_enable_cookie(ci->fscache, &ci->i_vino,
fscache_enable_cookie(ci->fscache, &ci->i_vino, i_size_read(inode),
ceph_fscache_can_enable, inode);
if (fscache_cookie_enabled(ci->fscache)) {
dout("fscache_file_set_cookie %p %p enabling cache\n",
@@ -308,7 +299,8 @@ void ceph_readpage_to_fscache(struct inode *inode, struct page *page)
if (!cache_valid(ci))
return;
ret = fscache_write_page(ci->fscache, page, GFP_KERNEL);
ret = fscache_write_page(ci->fscache, page, i_size_read(inode),
GFP_KERNEL);
if (ret)
fscache_uncache_page(ci->fscache, page);
}