#include <lunaix/ds/llist.h>
#include <lunaix/ds/lru.h>
#include <lunaix/ds/mutex.h>
-#include <lunaix/process.h>
#include <lunaix/status.h>
#include <stdatomic.h>
#define FSTYPE_ROFS 0x1
-#define DO_STATUS(errno) SYSCALL_ESTATUS(__current->k_status = errno)
-#define DO_STATUS_OR_RETURN(errno) ({ errno < 0 ? DO_STATUS(errno) : errno; })
-
#define TEST_FD(fd) (fd >= 0 && fd < VFS_MAX_FD)
#define VFS_VALID_CHAR(chr) \
(('A' <= (chr) && (chr) <= 'Z') || ('a' <= (chr) && (chr) <= 'z') || \
('0' <= (chr) && (chr) <= '9') || (chr) == '.' || (chr) == '_' || \
- (chr) == '-')
+ (chr) == '-' || (chr) == ':')
#define unlock_inode(inode) mutex_unlock(&inode->lock)
#define lock_inode(inode) \
lru_use_one(dnode_lru, &dnode->lru); \
})
-typedef uint32_t inode_t;
+typedef u32_t inode_t;
struct v_dnode;
struct v_inode;
{
struct hlist_node fs_list;
struct hstr fs_name;
- uint32_t types;
+ u32_t types;
int fs_id;
int (*mount)(struct v_superblock* vsb, struct v_dnode* mount_point);
int (*unmount)(struct v_superblock* vsb);
struct device* dev;
struct v_dnode* root;
struct filesystem* fs;
- uint32_t iobuf_size;
struct hbucket* i_cache;
+ void* data;
struct
{
- uint32_t (*read_capacity)(struct v_superblock* vsb);
- uint32_t (*read_usage)(struct v_superblock* vsb);
+ u32_t (*read_capacity)(struct v_superblock* vsb);
+ u32_t (*read_usage)(struct v_superblock* vsb);
void (*init_inode)(struct v_superblock* vsb, struct v_inode* inode);
} ops;
};
{
int (*write)(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
int (*read)(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
+
+ // for operatiosn {write|read}_page, following are true:
+ // + `len` always equals to PG_SIZE
+ // + `fpos` always PG_SIZE aligned.
+ // These additional operations allow underlying fs to use more specialized
+ // and optimized code.
+
+ int (*write_page)(struct v_inode* inode, void* pg, size_t len, size_t fpos);
+ int (*read_page)(struct v_inode* inode, void* pg, size_t len, size_t fpos);
+
int (*readdir)(struct v_file* file, struct dir_context* dctx);
int (*seek)(struct v_inode* inode, size_t offset); // optional
int (*close)(struct v_file* file);
struct v_inode* inode;
struct v_dnode* dnode;
struct llist_header* f_list;
- uint32_t f_pos;
+ u32_t f_pos;
atomic_ulong ref_count;
struct v_file_ops* ops; // for caching
};
int flags;
};
+// [v_inode::aka_nodes]
+// how do we invalidate corresponding v_dnodes given the v_inode?
+/*
+ Consider taskfs, which is Lunaix's speak of Linux's procfs, that allow
+ info of every process being accessible via file system. Each process's
+ creation will result a creation of a directory under the root of task fs
+ with it's pid as name. But that dir must delete when process is killed, and
+ such deletion does not mediated by vfs itself, so there is a need of cache
+ syncing.
+ And this is also the case of all ramfs where argumentation to file tree is
+ performed by third party.
+*/
+
struct v_inode
{
inode_t id;
mutex_t lock;
- uint32_t itype;
+ u32_t itype;
time_t ctime;
time_t mtime;
time_t atime;
lba_t lb_addr;
- uint32_t open_count;
- uint32_t link_count;
- uint32_t lb_usage;
- uint32_t fsize;
+ u32_t open_count;
+ u32_t link_count;
+ u32_t lb_usage;
+ u32_t fsize;
+ void* data; // 允许底层FS绑定他的一些专有数据
+ struct llist_header aka_dnodes;
struct llist_header xattrs;
struct v_superblock* sb;
struct hlist_node hash_list;
struct lru_node lru;
struct pcache* pg_cache;
- void* data; // 允许底层FS绑定他的一些专有数据
struct v_inode_ops* ops;
struct v_file_ops* default_fops;
+
+ void (*destruct)(struct v_inode* inode);
};
struct v_mount
struct v_mount* parent;
struct v_dnode* mnt_point;
struct v_superblock* super_block;
- uint32_t busy_counter;
+ u32_t busy_counter;
int flags;
};
struct v_inode* inode;
struct v_dnode* parent;
struct hlist_node hash_list;
+ struct llist_header aka_list;
struct llist_header children;
struct llist_header siblings;
struct v_superblock* super_block;
struct btrie tree;
struct llist_header pages;
struct llist_header dirty;
- uint32_t n_dirty;
- uint32_t n_pages;
+ u32_t n_dirty;
+ u32_t n_pages;
};
struct pcache_pg
struct lru_node lru;
struct pcache* holder;
void* pg;
- uint32_t flags;
- uint32_t fpos;
+ u32_t flags;
+ u32_t fpos;
+ u32_t len;
};
-/* --- file system manager --- */
+
void
fsm_init();
void
vfs_init();
+void
+vfs_export_attributes();
+
struct v_dnode*
vfs_dcache_lookup(struct v_dnode* parent, struct hstr* str);
int
vfs_open(struct v_dnode* dnode, struct v_file** file);
+int
+vfs_pclose(struct v_file* file, pid_t pid);
+
int
vfs_close(struct v_file* file);
+void
+vfs_free_fd(struct v_fd* fd);
+
int
vfs_fsync(struct v_file* file);
vfs_d_free(struct v_dnode* dnode);
struct v_inode*
-vfs_i_find(struct v_superblock* sb, uint32_t i_id);
+vfs_i_find(struct v_superblock* sb, u32_t i_id);
void
vfs_i_addhash(struct v_inode* inode);
int
vfs_getfd(int fd, struct v_fd** fd_s);
+int
+vfs_get_dtype(int itype);
+
+void
+vfs_ref_dnode(struct v_dnode* dnode);
+
+void
+vfs_ref_file(struct v_file* file);
+
+void
+vfs_unref_dnode(struct v_dnode* dnode);
+
+int
+vfs_get_path(struct v_dnode* dnode, char* buf, size_t size, int depth);
+
void
pcache_init(struct pcache* pcache);
pcache_release_page(struct pcache* pcache, struct pcache_pg* page);
struct pcache_pg*
-pcache_new_page(struct pcache* pcache, uint32_t index);
+pcache_new_page(struct pcache* pcache, u32_t index);
void
pcache_set_dirty(struct pcache* pcache, struct pcache_pg* pg);
-struct pcache_pg*
+int
pcache_get_page(struct pcache* pcache,
- uint32_t index,
- uint32_t* offset,
+ u32_t index,
+ u32_t* offset,
struct pcache_pg** page);
int
-pcache_write(struct v_inode* inode, void* data, uint32_t len, uint32_t fpos);
+pcache_write(struct v_inode* inode, void* data, u32_t len, u32_t fpos);
int
-pcache_read(struct v_inode* inode, void* data, uint32_t len, uint32_t fpos);
+pcache_read(struct v_inode* inode, void* data, u32_t len, u32_t fpos);
void
pcache_release(struct pcache* pcache);
git://scm.lunaixsky.com / lunaix-os.git / blobdiff