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9pfs: Don't use file descriptors in core code

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v9fs_getattr() currently peeks into V9fsFidOpenState to know if a fid
has a valid file descriptor or directory stream. Even though the fields
are accessible, this is an implementation detail of the local backend
that should not be manipulated directly by the server code.

Abstract that with a new has_valid_file_handle() backend operation.

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <20250312152933.383967-3-groug@kaod.org>
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
This commit is contained in:
Greg Kurz 2025-03-12 16:29:28 +01:00 • committed by Christian Schoenebeck
parent 4f82ce8cd9
commit f2bb367d2b
4 changed files with 21 additions and 3 deletions
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fsdev/file-op-9p.h
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@ -164,6 +164,7 @@ struct FileOperations {
int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name,
V9fsPath *newdir, const char *new_name);
int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags);
bool (*has_valid_file_handle)(int fid_type, V9fsFidOpenState *fs);
};
#endif