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| author | Jeff Layton <jeff.layton@primarydata.com> | 2019-08-18 14:18:44 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2019-08-19 11:00:39 -0400 |
| commit | f69d6d8eef7807f8d937b81da24bebd2e926e4d2 (patch) | |
| tree | 32597d19a96925f26e143ec5fff212d0e89e3e2b | |
| parent | 4866073e6ddf03066c925d3237903d7f4ca68982 (diff) | |
| download | linux-stable-f69d6d8eef7807f8d937b81da24bebd2e926e4d2.tar.gz linux-stable-f69d6d8eef7807f8d937b81da24bebd2e926e4d2.tar.bz2 linux-stable-f69d6d8eef7807f8d937b81da24bebd2e926e4d2.zip | |
sunrpc: add a new cache_detail operation for when a cache is flushed
When the exports table is changed, exportfs will usually write a new
time to the "flush" file in the nfsd.export cache procfile. This tells
the kernel to flush any entries that are older than that value.
This gives us a mechanism to tell whether an unexport might have
occurred. Add a new ->flush cache_detail operation that is called after
flushing the cache whenever someone writes to a "flush" file.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | include/linux/sunrpc/cache.h | 1 | ||||
| -rw-r--r-- | net/sunrpc/cache.c | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h index f7d086b77a21..f8603724fbee 100644 --- a/include/linux/sunrpc/cache.h +++ b/include/linux/sunrpc/cache.h @@ -87,6 +87,7 @@ struct cache_detail { int has_died); struct cache_head * (*alloc)(void); + void (*flush)(void); int (*match)(struct cache_head *orig, struct cache_head *new); void (*init)(struct cache_head *orig, struct cache_head *new); void (*update)(struct cache_head *orig, struct cache_head *new); diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index a6a6190ad37a..a349094f6fb7 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -1524,6 +1524,9 @@ static ssize_t write_flush(struct file *file, const char __user *buf, cd->nextcheck = now; cache_flush(); + if (cd->flush) + cd->flush(); + *ppos += count; return count; } |