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author | David Howells <dhowells@redhat.com> | 2013-08-21 21:29:38 (GMT) |
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committer | David Howells <dhowells@redhat.com> | 2013-09-06 08:17:30 (GMT) |
commit | da9803bc8812f5bd3b26baaa90e515b843c65ff7 (patch) | |
tree | 889b39ec88863fb46606cf345eeb4fdf8a90a67e /fs/cachefiles/xattr.c | |
parent | 6e4664525b1db28f8c4e1130957f70a94c19213e (diff) | |
download | linux-fsl-qoriq-da9803bc8812f5bd3b26baaa90e515b843c65ff7.tar.xz |
FS-Cache: Add interface to check consistency of a cached object
Extend the fscache netfs API so that the netfs can ask as to whether a cache
object is up to date with respect to its corresponding netfs object:
int fscache_check_consistency(struct fscache_cookie *cookie)
This will call back to the netfs to check whether the auxiliary data associated
with a cookie is correct. It returns 0 if it is and -ESTALE if it isn't; it
may also return -ENOMEM and -ERESTARTSYS.
The backends now have to implement a mandatory operation pointer:
int (*check_consistency)(struct fscache_object *object)
that corresponds to the above API call. FS-Cache takes care of pinning the
object and the cookie in memory and managing this call with respect to the
object state.
Original-author: Hongyi Jia <jiayisuse@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Hongyi Jia <jiayisuse@gmail.com>
cc: Milosz Tanski <milosz@adfin.com>
Diffstat (limited to 'fs/cachefiles/xattr.c')
0 files changed, 0 insertions, 0 deletions