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| author | Jens Axboe <axboe@kernel.dk> | 2020-12-17 19:19:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-04 13:39:17 +0300 |
| commit | 5683caa7350f389d099b72bfdb289d2073286e32 (patch) | |
| tree | 2e8e896da574a2f3c4c3c8a4d02c13bc385b6245 /include/uapi | |
| parent | 0cf0ce8fb5b10d669072345ea855de112d0e0a43 (diff) | |
| download | linux-5683caa7350f389d099b72bfdb289d2073286e32.tar.xz | |
fs: expose LOOKUP_CACHED through openat2() RESOLVE_CACHED
[ Upstream commit 99668f618062816ca7ba639b007eb145b9d3d41e ]
Now that we support non-blocking path resolution internally, expose it
via openat2() in the struct open_how ->resolve flags. This allows
applications using openat2() to limit path resolution to the extent that
it is already cached.
If the lookup cannot be satisfied in a non-blocking manner, openat2(2)
will return -1/-EAGAIN.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/openat2.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/openat2.h b/include/uapi/linux/openat2.h index 58b1eb711360..a5feb7604948 100644 --- a/include/uapi/linux/openat2.h +++ b/include/uapi/linux/openat2.h @@ -35,5 +35,9 @@ struct open_how { #define RESOLVE_IN_ROOT 0x10 /* Make all jumps to "/" and ".." be scoped inside the dirfd (similar to chroot(2)). */ +#define RESOLVE_CACHED 0x20 /* Only complete if resolution can be + completed through cached lookup. May + return -EAGAIN if that's not + possible. */ #endif /* _UAPI_LINUX_OPENAT2_H */ |