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Kernel: Add support for named pipes

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These only copy inodes stat when created, if you fchmod/fchown a named
pipe, the change will not be visible on the filesystem
This commit is contained in:
Bananymous
2026-05-19 00:06:01 +03:00
parent 8224659c48
commit deb2f52a35
3 changed files with 124 additions and 24 deletions
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16
kernel/include/kernel/FS/Pipe.h
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@@ -5,13 +5,17 @@
#include <kernel/Memory/ByteRingBuffer.h>
#include <kernel/ThreadBlocker.h>
#include <sys/stat.h>
namespace Kernel
{
class Pipe : public Inode
class Pipe : public Inode, public BAN::Weakable<Pipe>
{
public:
static BAN::ErrorOr<BAN::RefPtr<Inode>> create(const Credentials&);
static BAN::ErrorOr<BAN::RefPtr<Inode>> open(BAN::RefPtr<Inode>, int status_flags);
static BAN::ErrorOr<BAN::RefPtr<Inode>> create(uid_t, gid_t);
~Pipe();
void on_close(int status_flags) override;
void on_clone(int status_flags) override;
@@ -31,7 +35,7 @@ namespace Kernel
virtual BAN::ErrorOr<long> ioctl_impl(int, void*) override;
private:
Pipe(const Credentials&);
Pipe(const struct stat&);
private:
Mutex m_mutex;
@@ -39,8 +43,10 @@ namespace Kernel
BAN::UniqPtr<ByteRingBuffer> m_buffer;
BAN::Atomic<uint32_t> m_writing_count { 1 };
BAN::Atomic<uint32_t> m_reading_count { 1 };
BAN::Atomic<uint32_t> m_writing_count { 0 };
BAN::Atomic<uint32_t> m_reading_count { 0 };
BAN::RefPtr<Inode> m_named_inode;
};
}