diff options
| author | Jingbo Xu <jefflexu@linux.alibaba.com> | 2022-11-24 11:42:11 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-12-07 10:56:29 +0800 |
| commit | 8669247524c73e16e4d3384c4ff882e5c5d06194 (patch) | |
| tree | 5229c6304c4f89b9ea2def556b1ae2a6a2eb51cb /include/linux/netfs.h | |
| parent | 1282dea37b09087b8aec59f0774572c16b52276a (diff) | |
fscache,cachefiles: add prepare_ondemand_read() callback
Add prepare_ondemand_read() callback dedicated for the on-demand read
scenario, so that callers from this scenario can be decoupled from
netfs_io_subrequest.
The original cachefiles_prepare_read() is now refactored to a generic
routine accepting a parameter list instead of netfs_io_subrequest.
There's no logic change, except that the debug id of subrequest and
request is removed from trace_cachefiles_prep_read().
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Acked-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20221124034212.81892-2-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'include/linux/netfs.h')
| -rw-r--r-- | include/linux/netfs.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/netfs.h b/include/linux/netfs.h index f2402ddeafbf..4c76ddfb6a67 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -267,6 +267,14 @@ struct netfs_cache_ops { loff_t *_start, size_t *_len, loff_t i_size, bool no_space_allocated_yet); + /* Prepare an on-demand read operation, shortening it to a cached/uncached + * boundary as appropriate. + */ + enum netfs_io_source (*prepare_ondemand_read)(struct netfs_cache_resources *cres, + loff_t start, size_t *_len, + loff_t i_size, + unsigned long *_flags, ino_t ino); + /* Query the occupancy of the cache in a region, returning where the * next chunk of data starts and how long it is. */ |