renamed and cleaned up export header files to match linux convention

[lunaix-os.git] / lunaix-os / includes / lunaix / fs.h

diff --git a/lunaix-os/includes/lunaix/fs.h b/lunaix-os/includes/lunaix/fs.h
index 6feb2aa0447769b7f5d68fda278936774036d8a8..003f41058248e490a6db4cf1a33f7ee5dd93870b 100644 (file)
--- a/lunaix-os/includes/lunaix/fs.h
+++ b/lunaix-os/includes/lunaix/fs.h
@@ -1,8 +1,6 @@
 #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>
@@ -10,9 +8,14 @@
 #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 <lunaix/fs_acl.h>
 
 #include <usr/lunaix/fstypes.h>
 
@@ -61,20 +64,25 @@
      ('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")
 
@@ -116,6 +124,28 @@ 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;
@@ -123,8 +153,8 @@ struct v_superblock
     struct v_dnode* root;
     struct filesystem* fs;
     struct blkbuf_cache* blks;
-    struct hbucket* i_cache;
-    struct hbucket* d_cache;
+    struct vncache i_cache;
+    struct vncache d_cache;
     
     void* data;
     unsigned int ref_count;
@@ -248,6 +278,11 @@ struct v_inode
     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;
@@ -299,7 +334,10 @@ struct v_dnode
 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
 {
@@ -358,6 +396,21 @@ 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();
 
@@ -389,6 +442,10 @@ vfs_walk_proc(const char* path,
               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,
@@ -645,6 +702,18 @@ void
 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)    \
@@ -707,4 +776,28 @@ check_symlink_node(struct v_inode* inode)
     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 */