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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 <[email protected]>
Acked-by: Anna Schumaker <[email protected]>
Tested-by: Steve Dickson <[email protected]>
This commit is contained in:
David Howells 2018-04-04 13:41:28 +01:00
commit ee1235a9a0
21 changed files with 127 additions and 166 deletions
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27
fs/9p/cache.c
View file

@ -75,7 +75,7 @@ void v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses)
v9ses->cachetag,
strlen(v9ses->cachetag),
NULL, 0,
v9ses, true);
v9ses, 0, true);
p9_debug(P9_DEBUG_FSC, "session %p get cookie %p\n",
v9ses, v9ses->fscache);
}
@ -88,20 +88,11 @@ void v9fs_cache_session_put_cookie(struct v9fs_session_info *v9ses)
v9ses->fscache = NULL;
}
static void v9fs_cache_inode_get_attr(const void *cookie_netfs_data,
uint64_t *size)
{
const struct v9fs_inode *v9inode = cookie_netfs_data;
*size = i_size_read(&v9inode->vfs_inode);
p9_debug(P9_DEBUG_FSC, "inode %p get attr %llu\n",
&v9inode->vfs_inode, *size);
}
static enum
fscache_checkaux v9fs_cache_inode_check_aux(void *cookie_netfs_data,
const void *buffer,
uint16_t buflen)
uint16_t buflen,
loff_t object_size)
{
const struct v9fs_inode *v9inode = cookie_netfs_data;
@ -118,7 +109,6 @@ fscache_checkaux v9fs_cache_inode_check_aux(void *cookie_netfs_data,
const struct fscache_cookie_def v9fs_cache_inode_index_def = {
.name = "9p.inode",
.type = FSCACHE_COOKIE_TYPE_DATAFILE,
.get_attr = v9fs_cache_inode_get_attr,
.check_aux = v9fs_cache_inode_check_aux,
};
@ -141,7 +131,9 @@ void v9fs_cache_inode_get_cookie(struct inode *inode)
sizeof(v9inode->qid.path),
&v9inode->qid.version,
sizeof(v9inode->qid.version),
v9inode, true);
v9inode,
i_size_read(&v9inode->vfs_inode),
true);
p9_debug(P9_DEBUG_FSC, "inode %p get cookie %p\n",
inode, v9inode->fscache);
@ -212,7 +204,9 @@ void v9fs_cache_inode_reset_cookie(struct inode *inode)
sizeof(v9inode->qid.path),
&v9inode->qid.version,
sizeof(v9inode->qid.version),
v9inode, true);
v9inode,
i_size_read(&v9inode->vfs_inode),
true);
p9_debug(P9_DEBUG_FSC, "inode %p revalidating cookie old %p new %p\n",
inode, old, v9inode->fscache);
@ -338,7 +332,8 @@ void __v9fs_readpage_to_fscache(struct inode *inode, struct page *page)
const struct v9fs_inode *v9inode = V9FS_I(inode);
p9_debug(P9_DEBUG_FSC, "inode %p page %p\n", inode, page);
ret = fscache_write_page(v9inode->fscache, page, GFP_KERNEL);
ret = fscache_write_page(v9inode->fscache, page,
i_size_read(&v9inode->vfs_inode), GFP_KERNEL);
p9_debug(P9_DEBUG_FSC, "ret = %d\n", ret);
if (ret != 0)
v9fs_uncache_page(inode, page);