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Volume-centric VFS implementation
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Kamil Kowalczyk
2026-02-25 08:53:54 +01:00
parent 62a6543dab
commit 704db2dfa4
26 changed files with 441 additions and 406 deletions
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58
kernel/fs/vfs.h
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@@ -7,64 +7,56 @@
#include <libk/list.h>
#include <libk/rbtree.h>
#include <libk/std.h>
#include <path.h>
#include <path_defs.h>
#include <proc/proc.h>
#include <proc/procgroup.h>
#include <proc/reschedule.h>
#include <proc/suspension_q.h>
#include <sync/spin_lock.h>
#define VFS_KERNEL ((struct proc*)0x123)
#define VFS_TARFS 0
struct vfs_mountpoint;
struct vfs_volume;
struct vfs_handle {
int id;
struct vfs_mountpoint* mountpoint;
char path[MAX_PATH];
struct procgroup* ownerpg;
struct rb_node_link handle_tree_link;
spin_lock_t lock;
};
struct vfs_mountpoint {
char key[0x100];
struct hash_node_link mount_table_link;
struct vfs_volume {
char key[VOLUME_MAX];
struct hash_node_link volume_table_link;
int fs_type;
spin_lock_t lock;
struct proc* owner;
bool locked;
struct proc_suspension_q sq;
struct {
int (*mount) (struct vfs_mountpoint* mountpoint, struct proc* proc,
struct reschedule_ctx* rctx);
int (*mount) (struct vfs_volume* volume, struct proc* proc, struct reschedule_ctx* rctx);
int (*describe) (struct vfs_mountpoint* mountpoint, const char* path, struct desc* desc);
int (*describe) (struct vfs_volume* volume, const char* path, struct desc* desc);
int (*read) (struct vfs_mountpoint* mountpoint, const char* path, uint8_t* buffer, size_t off,
int (*read) (struct vfs_volume* volume, const char* path, uint8_t* buffer, size_t off,
size_t size);
} driver_ops;
struct device* back_device;
void* udata
};
struct vfs_mount_table {
struct hash_node_link* mountpoint_buckets[1024];
struct vfs_volume_table {
struct hash_node_link* volume_buckets[1024];
spin_lock_t lock;
};
int vfs_create_mountpoint (const char* key, int fs_type, struct device* back_device,
struct proc* proc, struct reschedule_ctx* rctx);
int vfs_create_volume (const char* key, int fs_type, struct device* back_device, struct proc* proc,
struct reschedule_ctx* rctx);
int vfs_describe (struct procgroup* procgroup, int id, struct desc* desc);
int vfs_volume_open (struct proc* proc, const char* volume, struct reschedule_ctx* rctx);
int vfs_read (struct procgroup* procgroup, int id, uint8_t* buffer, size_t off, size_t size);
int vfs_volume_close (struct proc* proc, const char* volume, struct reschedule_ctx* rctx);
int vfs_close (struct procgroup* procgroup, int id);
int vfs_read (struct proc* proc, const char* volume, const char* path, uint8_t* buffer, size_t off,
size_t size, struct reschedule_ctx* rctx);
int vfs_open (struct procgroup* procgroup, const char* mountpoint, const char* path);
int vfs_kernel_read (const char* mountpoint, const char* path, uint8_t* buffer, size_t off,
size_t size);
int vfs_kernel_describe (const char* mountpoint, const char* path, struct desc* desc);
void vfs_procgroup_cleanup (struct procgroup* procgroup);
int vfs_describe (struct proc* proc, const char* volume, const char* path, struct desc* desc,
struct reschedule_ctx* rctx);
void vfs_init (void);