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vhost_user_fs: Add the ZERO_MESSAGE_OPENDIR capability flag

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Add ZERO_MESSAGE_OPENDIR capability flag, corresponding to
FUSE_NO_OPENDIR_SUPPORT introduced in FUSE 7.29.

Signed-off-by: Sergio Lopez <slp@redhat.com>
This commit is contained in:
Sergio Lopez 2020-04-08 12:05:24 +02:00 committed by Rob Bradford
parent a2830da7c0
commit 621ea837fa
1 changed files with 13 additions and 0 deletions
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13
vhost_user_fs/src/fuse.rs
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@ -143,6 +143,9 @@ const MAX_PAGES: u32 = 4_194_304;
/// Cache READLINK responses
const CACHE_SYMLINKS: u32 = 8_388_608;
/// Kernel supports zero-message opendir
const NO_OPENDIR_SUPPORT: u32 = 16_777_216;
bitflags! {
/// A bitfield passed in as a parameter to and returned from the `init` method of the
/// `FileSystem` trait.
@ -328,6 +331,16 @@ bitflags! {
///
/// This feature is not currently supported.
const CACHE_SYMLINKS = CACHE_SYMLINKS;
/// Indicates support for zero-message opens. If this flag is set in the `capable` parameter
/// of the `init` trait method, then the file system may return `ENOSYS` from the opendir() handler
/// to indicate success. Further attempts to open directories will be handled in the kernel. (If
/// this flag is not set, returning ENOSYS will be treated as an error and signaled to the
/// caller).
///
/// Setting (or not setting) the field in the `FsOptions` returned from the `init` method
/// has no effect.
const ZERO_MESSAGE_OPENDIR = NO_OPENDIR_SUPPORT;
}
}