vfs.h

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// SPDX-License-Identifier: GPL-3.0-or-later
// Virtual File System Public API
 
#pragma once
 
#include <mos/filesystem/fs_types.h>
#include <mos/filesystem/vfs_types.h>
#include <mos/lib/sync/mutex.h>
#include <mos/types.h>
 
should_inline const file_ops_t *file_get_ops(file_t *file)
{
    if (!file)
        goto error;
 
    if (!file->dentry)
        goto error;
 
    if (!file->dentry->inode)
        goto error;
 
    if (!file->dentry->inode->file_ops)
        goto error;
 
    return file->dentry->inode->file_ops;
 
error:
    pr_warn("no file_ops for file %p", (void *) file);
    return NULL;
}
 
extern dentry_t *root_dentry;
 
file_t *vfs_do_open_dentry(dentry_t *entry, bool created, bool read, bool write, bool exec, bool truncate);
 
void vfs_register_filesystem(filesystem_t *fs);
 
long vfs_mount(const char *device, const char *path, const char *fs, const char *options);
 
long vfs_unmount(const char *path);
 
file_t *vfs_openat(int fd, const char *path, open_flags flags);
 
long vfs_fstatat(fd_t fd, const char *path, file_stat_t *restrict stat, fstatat_flags flags);
 
size_t vfs_readlinkat(fd_t dirfd, const char *path, char *buf, size_t size);
 
long vfs_symlink(const char *path, const char *target);
 
long vfs_mkdir(const char *path);
long vfs_rmdir(const char *path);
 
size_t vfs_list_dir(io_t *io, void *buf, size_t size);
 
long vfs_chdirat(fd_t dirfd, const char *path);
 
ssize_t vfs_getcwd(char *buf, size_t size);
 
long vfs_fchmodat(fd_t fd, const char *path, int perm, int flags);
 
long vfs_unlinkat(fd_t dirfd, const char *path);
 
long vfs_fsync(io_t *io, bool sync_metadata, off_t start, off_t end);