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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-05-22 15:38:57 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-07-06 21:54:49 +0300 |
| commit | 1c341b777501613aad83f9c233a3fe5701cff083 (patch) | |
| tree | a0502ea51a60baedffff7a73b0f762244b469a2b /include/linux/nfs_fs.h | |
| parent | 44942b4e457beda00981f616402a1a791e8c616e (diff) | |
| download | linux-1c341b777501613aad83f9c233a3fe5701cff083.tar.xz | |
NFS: Add deferred cache invalidation for close-to-open consistency violations
If the client detects that close-to-open cache consistency has been
violated, and that the file or directory has been changed on the
server, then do a cache invalidation when we're done working with
the file.
The reason we don't do an immediate cache invalidation is that we
want to avoid performance problems due to false positives. Also,
note that we cannot guarantee cache consistency in this situation
even if we do invalidate the cache.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'include/linux/nfs_fs.h')
| -rw-r--r-- | include/linux/nfs_fs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index d363d5765cdf..0a11712a80e3 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -223,6 +223,8 @@ struct nfs4_copy_state { #define NFS_INO_INVALID_MTIME BIT(10) /* cached mtime is invalid */ #define NFS_INO_INVALID_SIZE BIT(11) /* cached size is invalid */ #define NFS_INO_INVALID_OTHER BIT(12) /* other attrs are invalid */ +#define NFS_INO_DATA_INVAL_DEFER \ + BIT(13) /* Deferred cache invalidation */ #define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \ | NFS_INO_INVALID_CTIME \ |