mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-17 08:17:30 +03:00
Kernel: Add statvfs & fstatvfs Syscalls
These syscalls fill a statvfs struct with various data about the mount on the VFS.
This commit is contained in:
parent
721a867c65
commit
1c3badede3
Notes:
sideshowbarker
2024-07-18 17:46:42 +09:00
Author: https://github.com/sw1tchbl4d3r Commit: https://github.com/SerenityOS/serenity/commit/1c3badede31 Pull-request: https://github.com/SerenityOS/serenity/pull/6742 Reviewed-by: https://github.com/awesomekling
@ -22,6 +22,7 @@ struct timespec;
|
||||
struct sockaddr;
|
||||
struct siginfo;
|
||||
struct stat;
|
||||
struct statvfs;
|
||||
typedef u32 socklen_t;
|
||||
}
|
||||
|
||||
@ -177,7 +178,9 @@ namespace Kernel {
|
||||
S(anon_create) \
|
||||
S(msyscall) \
|
||||
S(readv) \
|
||||
S(emuctl)
|
||||
S(emuctl) \
|
||||
S(statvfs) \
|
||||
S(fstatvfs)
|
||||
|
||||
namespace Syscall {
|
||||
|
||||
@ -458,6 +461,11 @@ struct SC_inode_watcher_add_watch_params {
|
||||
u32 event_mask;
|
||||
};
|
||||
|
||||
struct SC_statvfs_params {
|
||||
StringArgument path;
|
||||
struct statvfs* buf;
|
||||
};
|
||||
|
||||
void initialize();
|
||||
int sync();
|
||||
|
||||
|
@ -196,6 +196,7 @@ set(KERNEL_SOURCES
|
||||
Syscalls/sigaction.cpp
|
||||
Syscalls/socket.cpp
|
||||
Syscalls/stat.cpp
|
||||
Syscalls/statvfs.cpp
|
||||
Syscalls/sync.cpp
|
||||
Syscalls/sysconf.cpp
|
||||
Syscalls/thread.cpp
|
||||
|
@ -410,6 +410,8 @@ public:
|
||||
KResultOr<int> sys$prctl(int option, FlatPtr arg1, FlatPtr arg2);
|
||||
KResultOr<int> sys$set_coredump_metadata(Userspace<const Syscall::SC_set_coredump_metadata_params*>);
|
||||
KResultOr<int> sys$anon_create(size_t, int options);
|
||||
KResultOr<int> sys$statvfs(Userspace<const Syscall::SC_statvfs_params*> user_params);
|
||||
KResultOr<int> sys$fstatvfs(int fd, statvfs* buf);
|
||||
|
||||
template<bool sockname, typename Params>
|
||||
int get_sock_or_peer_name(const Params&);
|
||||
@ -529,6 +531,8 @@ private:
|
||||
KResult do_exec(NonnullRefPtr<FileDescription> main_program_description, Vector<String> arguments, Vector<String> environment, RefPtr<FileDescription> interpreter_description, Thread*& new_main_thread, u32& prev_flags, const Elf32_Ehdr& main_program_header);
|
||||
KResultOr<ssize_t> do_write(FileDescription&, const UserOrKernelBuffer&, size_t);
|
||||
|
||||
KResultOr<int> do_statvfs(String path, statvfs* buf);
|
||||
|
||||
KResultOr<RefPtr<FileDescription>> find_elf_interpreter_for_executable(const String& path, const Elf32_Ehdr& elf_header, int nread, size_t file_size);
|
||||
|
||||
int alloc_fd(int first_candidate_fd = 0);
|
||||
|
97
Kernel/Syscalls/statvfs.cpp
Normal file
97
Kernel/Syscalls/statvfs.cpp
Normal file
@ -0,0 +1,97 @@
|
||||
/*
|
||||
* Copyright (c) 2021, Justin Mietzner <sw1tchbl4d3@sw1tchbl4d3.com>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#include <Kernel/FileSystem/Custody.h>
|
||||
#include <Kernel/FileSystem/FileDescription.h>
|
||||
#include <Kernel/FileSystem/VirtualFileSystem.h>
|
||||
#include <Kernel/Process.h>
|
||||
|
||||
namespace Kernel {
|
||||
|
||||
KResultOr<int> Process::do_statvfs(String path, statvfs* buf)
|
||||
{
|
||||
auto custody_or_error = VFS::the().resolve_path(path, current_directory(), nullptr, 0);
|
||||
if (custody_or_error.is_error())
|
||||
return custody_or_error.error();
|
||||
|
||||
auto& custody = custody_or_error.value();
|
||||
auto& inode = custody->inode();
|
||||
auto& fs = inode.fs();
|
||||
|
||||
statvfs kernelbuf = {};
|
||||
|
||||
kernelbuf.f_bsize = static_cast<u64>(fs.block_size());
|
||||
kernelbuf.f_frsize = fs.fragment_size();
|
||||
kernelbuf.f_blocks = fs.total_block_count();
|
||||
kernelbuf.f_bfree = fs.free_block_count();
|
||||
|
||||
// FIXME: Implement "available blocks" into Filesystem
|
||||
kernelbuf.f_bavail = fs.free_block_count();
|
||||
|
||||
kernelbuf.f_files = fs.total_inode_count();
|
||||
kernelbuf.f_ffree = fs.free_inode_count();
|
||||
kernelbuf.f_favail = fs.free_inode_count(); // FIXME: same as f_bavail
|
||||
|
||||
kernelbuf.f_fsid = 0; // FIXME: Implement "Filesystem ID" into Filesystem
|
||||
|
||||
kernelbuf.f_namemax = 255;
|
||||
|
||||
Custody* current_custody = custody;
|
||||
|
||||
while (current_custody) {
|
||||
VFS::the().for_each_mount([&kernelbuf, ¤t_custody](auto& mount) {
|
||||
if (current_custody) {
|
||||
if (¤t_custody->inode() == &mount.guest()) {
|
||||
int mountflags = mount.flags();
|
||||
int flags = 0;
|
||||
if (mountflags & MS_RDONLY)
|
||||
flags = flags | ST_RDONLY;
|
||||
if (mountflags & MS_NOSUID)
|
||||
flags = flags | ST_NOSUID;
|
||||
|
||||
kernelbuf.f_flag = flags;
|
||||
current_custody = nullptr;
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
if (current_custody) {
|
||||
current_custody = current_custody->parent();
|
||||
}
|
||||
}
|
||||
|
||||
if (!copy_to_user(buf, &kernelbuf))
|
||||
return EFAULT;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
KResultOr<int> Process::sys$statvfs(Userspace<const Syscall::SC_statvfs_params*> user_params)
|
||||
{
|
||||
REQUIRE_PROMISE(rpath);
|
||||
|
||||
Syscall::SC_statvfs_params params;
|
||||
if (!copy_from_user(¶ms, user_params))
|
||||
return EFAULT;
|
||||
auto path = get_syscall_path_argument(params.path);
|
||||
if (path.is_error())
|
||||
return path.error();
|
||||
|
||||
return do_statvfs(path.value(), params.buf);
|
||||
}
|
||||
|
||||
KResultOr<int> Process::sys$fstatvfs(int fd, statvfs* buf)
|
||||
{
|
||||
REQUIRE_PROMISE(stdio);
|
||||
|
||||
auto description = file_description(fd);
|
||||
if (!description)
|
||||
return EBADF;
|
||||
|
||||
return do_statvfs(description->absolute_path(), buf);
|
||||
}
|
||||
|
||||
}
|
@ -718,3 +718,25 @@ enum {
|
||||
DT_WHT = 14
|
||||
#define DT_WHT DT_WHT
|
||||
};
|
||||
|
||||
typedef uint64_t fsblkcnt_t;
|
||||
typedef uint64_t fsfilcnt_t;
|
||||
|
||||
#define ST_RDONLY 0x1
|
||||
#define ST_NOSUID 0x2
|
||||
|
||||
struct statvfs {
|
||||
unsigned long f_bsize;
|
||||
unsigned long f_frsize;
|
||||
fsblkcnt_t f_blocks;
|
||||
fsblkcnt_t f_bfree;
|
||||
fsblkcnt_t f_bavail;
|
||||
|
||||
fsfilcnt_t f_files;
|
||||
fsfilcnt_t f_ffree;
|
||||
fsfilcnt_t f_favail;
|
||||
|
||||
unsigned long f_fsid;
|
||||
unsigned long f_flag;
|
||||
unsigned long f_namemax;
|
||||
};
|
||||
|
Loading…
Reference in New Issue
Block a user