46 lines
1.4 KiB
Diff
46 lines
1.4 KiB
Diff
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From: Miklos Szeredi <mszeredi@redhat.com>
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Subject: libfuse: add feature flag for expire-only
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Add the FUSE_HAS_EXPIRE_ONLY flag. This should be used to set the
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FUSE_CAP_EXPIRE_ONLY capability flag on the low level API instead of
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checking for the version.
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Checking the version doesn't work if the feature is backported to an
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earlier kernel.
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Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
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---
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include/fuse_kernel.h | 2 ++
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lib/fuse_lowlevel.c | 2 +-
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2 files changed, 3 insertions(+), 1 deletion(-)
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--- a/include/fuse_kernel.h
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+++ b/include/fuse_kernel.h
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@@ -274,6 +274,7 @@
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* FUSE_CACHE_SYMLINKS: cache READLINK responses
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* FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
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* FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
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+ * FUSE_HAS_EXPIRE_ONLY: kernel supports expiry-only entry invalidation
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*/
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#define FUSE_ASYNC_READ (1 << 0)
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#define FUSE_POSIX_LOCKS (1 << 1)
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@@ -302,6 +303,7 @@
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#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
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#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
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#define FUSE_INIT_EXT (1 << 30)
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+#define FUSE_HAS_EXPIRE_ONLY (1ULL << 35)
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/**
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* CUSE INIT request/reply flags
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--- a/lib/fuse_lowlevel.c
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+++ b/lib/fuse_lowlevel.c
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@@ -2008,7 +2008,7 @@ void do_init(fuse_req_t req, fuse_ino_t
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bufsize = max_bufsize;
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}
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}
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- if (arg->minor >= 38)
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+ if (inargflags & FUSE_HAS_EXPIRE_ONLY)
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se->conn.capable |= FUSE_CAP_EXPIRE_ONLY;
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} else {
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se->conn.max_readahead = 0;
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