#ifndef __LUNAIX_VFS_H
#define __LUNAIX_VFS_H
-#include <lunaix/clock.h>
-#include <lunaix/device.h>
#include <lunaix/ds/btrie.h>
#include <lunaix/ds/hashtable.h>
#include <lunaix/ds/hstr.h>
#include <lunaix/ds/llist.h>
#include <lunaix/ds/lru.h>
#include <lunaix/ds/mutex.h>
+#include <lunaix/ds/rwlock.h>
+
+#include <lunaix/clock.h>
+#include <lunaix/device.h>
#include <lunaix/status.h>
#include <lunaix/spike.h>
#include <lunaix/bcache.h>
-
-#include <stdatomic.h>
+#include <lunaix/fs_acl.h>
#include <usr/lunaix/fstypes.h>
('0' <= (chr) && (chr) <= '9') || (chr) == '.' || (chr) == '_' || \
(chr) == '-' || (chr) == ':')
-#define unlock_inode(inode) mutex_unlock(&inode->lock)
+#define unlock_inode(inode) mutex_unlock_nested(&inode->lock)
#define lock_inode(inode) \
({ \
- mutex_lock(&inode->lock); \
+ mutex_lock_nested(&inode->lock); \
lru_use_one(inode_lru, &inode->lru); \
})
-#define unlock_dnode(dnode) mutex_unlock(&dnode->lock)
+#define unlock_dnode(dnode) mutex_unlock_nested(&dnode->lock)
#define lock_dnode(dnode) \
({ \
- mutex_lock(&dnode->lock); \
+ mutex_lock_nested(&dnode->lock); \
lru_use_one(dnode_lru, &dnode->lru); \
})
+#define dnode_atomic(dnode, ops) \
+ do { lock_dnode(dnode); ops; unlock_dnode(dnode); } while(0)
+
+#define locked_node(node) mutex_on_hold(&(node)->lock)
+
#define assert_fs(cond) assert_p(cond, "FS")
#define fail_fs(msg) fail_p(msg, "FS")
mntops_umnt unmount;
};
+struct fs_iter
+{
+ struct filesystem* fs;
+};
+
+struct vncache
+{
+ struct hbucket* pool;
+ rwlock_t lock;
+};
+#define cache_atomic_read(cache, ops) \
+ do { \
+ rwlock_begin_read(&(cache)->lock); \
+ ops; \
+ rwlock_end_read(&(cache)->lock); \
+ } while (0)
+
+#define cache_atomic_write(cache, ops) \
+ do { \
+ rwlock_begin_write(&(cache)->lock); \
+ ops; \
+ rwlock_end_write(&(cache)->lock); \
+ } while (0)
+
+#define dnode_cache(dnode) (&(dnode)->super_block->d_cache)
+#define inode_cache(inode) (&(inode)->sb->i_cache)
+
struct v_superblock
{
struct llist_header sb_list;
struct v_dnode* root;
struct filesystem* fs;
struct blkbuf_cache* blks;
- struct hbucket* i_cache;
+ struct vncache i_cache;
+ struct vncache d_cache;
+
void* data;
unsigned int ref_count;
size_t blksize;
struct v_dnode* dnode;
struct llist_header* f_list;
u32_t f_pos;
- atomic_ulong ref_count;
+ unsigned long ref_count;
void* data;
struct v_file_ops* ops; // for caching
};
u32_t link_count;
u32_t lb_usage;
u32_t fsize;
+
+ u32_t acl;
+ uid_t uid;
+ gid_t gid;
+
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 llist_header aka_list;
struct llist_header children;
struct llist_header siblings;
+
struct v_superblock* super_block;
struct v_mount* mnt;
- atomic_ulong ref_count;
+
+ unsigned long ref_count;
void* data;
struct v_fdtable
{
struct v_fd* fds[VFS_MAX_FD];
+ mutex_t lock; // inter-threads contention
};
+#define lock_fdtable(fdtab) mutex_lock(&(fdtab)->lock)
+#define unlock_fdtable(fdtab) mutex_unlock(&(fdtab)->lock)
struct pcache
{
struct filesystem*
fsm_get(const char* fs_name);
+void
+fsm_itbegin(struct fs_iter* iterator);
+
+bool
+fsm_itnext(struct fs_iter* iterator);
+
+static inline void
+fsm_itend(struct fs_iter* iterator)
+{
+ iterator->fs = NULL;
+}
+
+void
+vfs_vncache_init(struct vncache* cache);
+
+void
+vfs_vncache_free(struct vncache* cache);
+
+void
+vfs_vncache_add(struct vncache* cache, size_t key, struct hlist_node* node);
+
+#define vncache_lock_read(cache) rwlock_begin_read(&(cache)->lock);
+#define vncache_unlock_read(cache) rwlock_end_read(&(cache)->lock);
+
+#define vncache_lock_write(cache) rwlock_begin_write(&(cache)->lock);
+#define vncache_unlock_write(cache) rwlock_end_write(&(cache)->lock);
+
void
vfs_init();
struct hstr* component,
int options);
+int
+vfs_walkat(int fd, const char* path, int at_opts,
+ struct v_dnode** dnode_out);
+
int
vfs_mount(const char* target,
const char* fs_name,
vfs_sb_alloc();
void
-vfs_sb_free(struct v_superblock* sb);
+vfs_sb_unref(struct v_superblock* sb);
void
vfs_sb_ref(struct v_superblock* sb);
#define vfs_assign_sb(sb_accessor, sb) \
({ \
- if (sb_accessor) { \
- vfs_sb_free(sb_accessor); \
+ if (likely(sb_accessor)) { \
+ vfs_sb_unref(sb_accessor); \
} \
vfs_sb_ref(((sb_accessor) = (sb))); \
})
vfs_assign_sb(dnode->super_block, sb);
}
+static inline void
+vfs_d_assign_vmnt(struct v_dnode* dnode, struct v_mount* vmnt)
+{
+ if (dnode->mnt) {
+ assert_msg(dnode->mnt->mnt_point != dnode,
+ "vmnt must be detached first");
+ }
+
+ dnode->mnt = vmnt;
+
+ if (likely(vmnt))
+ vfs_d_assign_sb(dnode, vmnt->super_block);
+}
+
static inline void
vfs_vmnt_assign_sb(struct v_mount* vmnt, struct v_superblock* sb)
{
}
struct v_dnode*
-vfs_d_alloc();
+vfs_d_alloc(struct v_dnode* parent, struct hstr* name);
void
vfs_d_free(struct v_dnode* dnode);
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);
int
vfs_mount_root(const char* fs_name, struct device* device);
-struct v_mount*
-vfs_create_mount(struct v_mount* parent, struct v_dnode* mnt_point);
+static inline bool
+mnt_check_busy(struct v_mount* mnt)
+{
+ return mnt->busy_counter > 1;
+}
+
+static inline void
+vfs_ref_dnode(struct v_dnode* dnode)
+{
+ dnode->ref_count++;
+
+ if (likely(dnode->mnt)) {
+ mnt_mkbusy(dnode->mnt);
+ }
+}
+
+static inline void
+vfs_unref_dnode(struct v_dnode* dnode)
+{
+ dnode->ref_count--;
+
+ if (likely(dnode->mnt)) {
+ mnt_chillax(dnode->mnt);
+ }
+}
+
+static inline void
+vfs_ref_file(struct v_file* file)
+{
+ file->ref_count++;
+}
+
+static inline void
+vfs_unref_file(struct v_file* file)
+{
+ file->ref_count--;
+}
+
+static inline bool
+vfs_check_duped_file(struct v_file* file)
+{
+ return file->ref_count > 1;
+}
int
vfs_check_writable(struct v_dnode* dnode);
xattr_addcache(struct v_inode* inode, struct v_xattr_entry* xattr);
+/* --- fdtable --- */
+
+struct v_fdtable*
+fdtable_create();
+
+void
+fdtable_copy(struct v_fdtable* dest, struct v_fdtable* src);
+
+void
+fdtable_free(struct v_fdtable* table);
+
+
/* --- misc stuff --- */
#define check_itype(to_check, itype) \
return check_itype(inode->itype, VFS_IFSYMLINK);
}
+static inline bool
+check_allow_ops(struct v_inode* inode, unsigned int perm)
+{
+ return fsacl_allow_ops(perm, inode->acl, inode->uid, inode->gid);
+}
+
+static inline bool
+check_allow_read(struct v_inode* inode)
+{
+ return check_allow_ops(inode, FSACL_aR);
+}
+
+static inline bool
+check_allow_write(struct v_inode* inode)
+{
+ return check_allow_ops(inode, FSACL_aW);
+}
+
+static inline bool
+check_allow_execute(struct v_inode* inode)
+{
+ return check_allow_ops(inode, FSACL_aX);
+}
+
#endif /* __LUNAIX_VFS_H */
git://scm.lunaixsky.com / lunaix-os.git / blobdiff