4 #include <lunaix/clock.h>
5 #include <lunaix/device.h>
6 #include <lunaix/ds/btrie.h>
7 #include <lunaix/ds/hashtable.h>
8 #include <lunaix/ds/hstr.h>
9 #include <lunaix/ds/llist.h>
10 #include <lunaix/ds/lru.h>
11 #include <lunaix/ds/mutex.h>
12 #include <lunaix/status.h>
13 #include <stdatomic.h>
15 #define VFS_NAME_MAXLEN 128
19 #define VFS_IFFILE 0x2
20 #define VFS_IFSEQDEV 0x4
21 #define VFS_IFVOLDEV 0x8
22 #define VFS_IFSYMLINK 0x16
24 #define VFS_WALK_MKPARENT 0x1
25 #define VFS_WALK_FSRELATIVE 0x2
26 #define VFS_WALK_PARENT 0x4
27 #define VFS_WALK_NOFOLLOW 0x4
29 #define FSTYPE_ROFS 0x1
31 #define VFS_VALID_CHAR(chr) \
32 (('A' <= (chr) && (chr) <= 'Z') || ('a' <= (chr) && (chr) <= 'z') || \
33 ('0' <= (chr) && (chr) <= '9') || (chr) == '.' || (chr) == '_' || \
36 extern struct hstr vfs_ddot;
37 extern struct hstr vfs_dot;
48 struct hlist_node fs_list;
51 int fs_id; // can be used to detect fs type on partition
52 int (*mount)(struct v_superblock* vsb, struct v_dnode* mount_point);
53 int (*unmount)(struct v_superblock* vsb);
58 struct llist_header sb_list;
62 struct filesystem* fs;
66 uint32_t (*read_capacity)(struct v_superblock* vsb);
67 uint32_t (*read_usage)(struct v_superblock* vsb);
75 void (*read_complete_callback)(struct dir_context* dctx,
83 int (*write)(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
84 int (*read)(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
85 int (*readdir)(struct v_inode* inode, struct dir_context* dctx);
86 int (*seek)(struct v_inode* inode, size_t offset);
87 int (*close)(struct v_file* file);
88 int (*sync)(struct v_inode* inode);
93 struct v_inode* inode;
94 struct v_dnode* dnode;
95 struct llist_header* f_list;
97 atomic_ulong ref_count;
98 struct v_file_ops ops;
120 struct hlist_node hash_list;
122 struct pcache* pg_cache;
123 void* data; // 允许底层FS绑定他的一些专有数据
126 int (*create)(struct v_inode* this, struct v_dnode* dnode);
127 int (*open)(struct v_inode* this, struct v_file* file);
128 int (*sync)(struct v_inode* this);
129 int (*mkdir)(struct v_inode* this, struct v_dnode* dnode);
130 int (*rmdir)(struct v_inode* this, struct v_dnode* dir);
131 int (*unlink)(struct v_inode* this);
132 int (*link)(struct v_inode* this, struct v_dnode* new_name);
133 int (*read_symlink)(struct v_inode* this, const char** path_out);
134 int (*set_symlink)(struct v_inode* this, const char* target);
135 int (*dir_lookup)(struct v_inode* this, struct v_dnode* dnode);
136 int (*rename)(struct v_inode* from_inode,
137 struct v_dnode* from_dnode,
138 struct v_dnode* to_dnode);
140 struct v_file_ops default_fops;
145 mutex_t lock; // sync the path walking
148 struct v_inode* inode;
149 struct v_dnode* parent;
150 struct hlist_node hash_list;
151 struct llist_header children;
152 struct llist_header siblings;
153 struct v_superblock* super_block;
154 atomic_ulong ref_count;
159 struct v_fd* fds[VFS_MAX_FD];
164 struct v_inode* master;
166 struct llist_header pages;
167 struct llist_header dirty;
174 struct llist_header pg_list;
175 struct llist_header dirty_list;
177 struct pcache* holder;
182 /* --- file system manager --- */
187 fsm_register(struct filesystem* fs);
190 fsm_get(const char* fs_name);
196 vfs_dcache_lookup(struct v_dnode* parent, struct hstr* str);
199 vfs_dcache_add(struct v_dnode* parent, struct v_dnode* dnode);
202 vfs_walk(struct v_dnode* start,
204 struct v_dnode** dentry,
205 struct hstr* component,
209 vfs_mount(const char* target, const char* fs_name, struct device* device);
212 vfs_unmount(const char* target);
215 vfs_mount_at(const char* fs_name,
216 struct device* device,
217 struct v_dnode* mnt_point);
220 vfs_unmount_at(struct v_dnode* mnt_point);
223 vfs_mkdir(const char* path, struct v_dnode** dentry);
226 vfs_open(struct v_dnode* dnode, struct v_file** file);
229 vfs_close(struct v_file* file);
232 vfs_fsync(struct v_file* file);
235 vfs_assign_inode(struct v_dnode* assign_to, struct v_inode* inode);
241 vfs_sb_free(struct v_superblock* sb);
247 vfs_d_free(struct v_dnode* dnode);
250 vfs_i_alloc(dev_t device_id, uint32_t inode_id);
253 vfs_i_free(struct v_inode* inode);
256 vfs_dup_fd(struct v_fd* old, struct v_fd** new);
259 pcache_init(struct pcache* pcache);
262 pcache_release_page(struct pcache* pcache, struct pcache_pg* page);
265 pcache_new_page(struct pcache* pcache, uint32_t index);
268 pcache_set_dirty(struct pcache* pcache, struct pcache_pg* pg);
271 pcache_get_page(struct pcache* pcache,
274 struct pcache_pg** page);
277 pcache_write(struct v_inode* inode, void* data, uint32_t len, uint32_t fpos);
280 pcache_read(struct v_inode* inode, void* data, uint32_t len, uint32_t fpos);
283 pcache_release(struct pcache* pcache);
286 pcache_commit(struct v_inode* inode, struct pcache_pg* page);
289 pcache_commit_all(struct v_inode* inode);
292 pcache_invalidate(struct pcache* pcache, struct pcache_pg* page);
293 #endif /* __LUNAIX_VFS_H */