release the dnode lock after EACCESS in path walk

[lunaix-os.git] / lunaix-os / kernel / fs / twifs / twifs.c

diff --git a/lunaix-os/kernel/fs/twifs/twifs.c b/lunaix-os/kernel/fs/twifs/twifs.c
index 9a5dd8e9fd4f3370efed1a684b3153e1aa355ae6..9d474958bbe10763fc81c4b5d9a599a936ee7dbd 100644 (file)
--- a/lunaix-os/kernel/fs/twifs/twifs.c
+++ b/lunaix-os/kernel/fs/twifs/twifs.c
@@ -8,20 +8,23 @@
  * @copyright Copyright (c) 2022
  *
  */
  * @copyright Copyright (c) 2022
  *
  */

-#include <klibc/stdio.h>
+#include <klibc/strfmt.h>

 #include <klibc/string.h>
 #include <lunaix/clock.h>
 #include <klibc/string.h>
 #include <lunaix/clock.h>

-#include <lunaix/fs.h>
+#include <lunaix/fs/api.h>

 #include <lunaix/fs/twifs.h>
 #include <lunaix/fs/twifs.h>

+#include <lunaix/fs/twimap.h>

 #include <lunaix/mm/cake.h>
 #include <lunaix/mm/valloc.h>
 #include <lunaix/spike.h>
 
 #include <lunaix/mm/cake.h>
 #include <lunaix/mm/valloc.h>
 #include <lunaix/spike.h>
 

+#include <asm/pagetable.h>
+

 static struct twifs_node* fs_root;
 
 static struct cake_pile* twi_pile;
 
 static struct twifs_node* fs_root;
 
 static struct cake_pile* twi_pile;
 

-static volatile uint32_t inode_id = 0;
+static volatile u32_t inode_id = 0;

 
 extern const struct v_file_ops twifs_file_ops;
 extern const struct v_inode_ops twifs_inode_ops;
 
 extern const struct v_file_ops twifs_file_ops;
 extern const struct v_inode_ops twifs_inode_ops;


@@ -30,7 +33,7 @@ struct twifs_node*
 __twifs_new_node(struct twifs_node* parent,
                  const char* name,
                  int name_len,
 __twifs_new_node(struct twifs_node* parent,
                  const char* name,
                  int name_len,

-                 uint32_t itype)
+                 u32_t itype)

 {
     struct twifs_node* node = cake_grab(twi_pile);
     memset(node, 0, sizeof(*node));
 {
     struct twifs_node* node = cake_grab(twi_pile);
     memset(node, 0, sizeof(*node));


@@ -53,14 +56,20 @@ __twifs_new_node(struct twifs_node* parent,
 void
 __twifs_init_inode(struct v_superblock* vsb, struct v_inode* inode)
 {
 void
 __twifs_init_inode(struct v_superblock* vsb, struct v_inode* inode)
 {

-    inode->ops = &twifs_inode_ops;
-    inode->default_fops = &twifs_file_ops;
+    inode->ops = (struct v_inode_ops*)&twifs_inode_ops;
+    inode->default_fops = (struct v_file_ops*)&twifs_file_ops;
+
+
+    // we set default access right to be 0660.
+    // TODO need a way to allow this to be changed
+    
+    fsapi_inode_setaccess(inode, FSACL_DEFAULT);
+    fsapi_inode_setowner(inode, 0, 0);

 }
 
 int
 __twifs_mount(struct v_superblock* vsb, struct v_dnode* mount_point)
 {
 }
 
 int
 __twifs_mount(struct v_superblock* vsb, struct v_dnode* mount_point)
 {

-    vsb->dev = 1;

     vsb->ops.init_inode = __twifs_init_inode;
 
     struct v_inode* inode = vfs_i_alloc(vsb);
     vsb->ops.init_inode = __twifs_init_inode;
 
     struct v_inode* inode = vfs_i_alloc(vsb);


@@ -77,6 +86,12 @@ __twifs_mount(struct v_superblock* vsb, struct v_dnode* mount_point)
     return 0;
 }
 
     return 0;
 }
 

+int
+__twifs_unmount(struct v_superblock* vsb)
+{
+    return 0;
+}
+

 int
 __twifs_fwrite(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
 {
 int
 __twifs_fwrite(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
 {


@@ -87,6 +102,12 @@ __twifs_fwrite(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
     return twi_node->ops.write(inode, buffer, len, fpos);
 }
 
     return twi_node->ops.write(inode, buffer, len, fpos);
 }
 

+int
+__twifs_fwrite_pg(struct v_inode* inode, void* buffer, size_t fpos)
+{
+    return __twifs_fwrite(inode, buffer, PAGE_SIZE, fpos);
+}
+

 int
 __twifs_fread(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
 {
 int
 __twifs_fread(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
 {


@@ -97,6 +118,12 @@ __twifs_fread(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
     return twi_node->ops.read(inode, buffer, len, fpos);
 }
 
     return twi_node->ops.read(inode, buffer, len, fpos);
 }
 

+int
+__twifs_fread_pg(struct v_inode* inode, void* buffer, size_t fpos)
+{
+    return __twifs_fread(inode, buffer, PAGE_SIZE, fpos);
+}
+

 struct twifs_node*
 __twifs_get_node(struct twifs_node* parent, struct hstr* name)
 {
 struct twifs_node*
 __twifs_get_node(struct twifs_node* parent, struct hstr* name)
 {


@@ -118,7 +145,7 @@ __twifs_dirlookup(struct v_inode* inode, struct v_dnode* dnode)
 {
     struct twifs_node* twi_node = (struct twifs_node*)inode->data;
 
 {
     struct twifs_node* twi_node = (struct twifs_node*)inode->data;
 

-    if (!(twi_node->itype & VFS_IFDIR)) {
+    if (!check_directory_node(inode)) {

         return ENOTDIR;
     }
 
         return ENOTDIR;
     }
 


@@ -151,15 +178,18 @@ int
 __twifs_iterate_dir(struct v_file* file, struct dir_context* dctx)
 {
     struct twifs_node* twi_node = (struct twifs_node*)(file->inode->data);
 __twifs_iterate_dir(struct v_file* file, struct dir_context* dctx)
 {
     struct twifs_node* twi_node = (struct twifs_node*)(file->inode->data);

-    int counter = 0;
+    unsigned int counter = 2;

     struct twifs_node *pos, *n;
 
     struct twifs_node *pos, *n;
 

+    if (fsapi_handle_pseudo_dirent(file, dctx)) {
+        return 1;
+    }
+

     llist_for_each(pos, n, &twi_node->children, siblings)
     {
     llist_for_each(pos, n, &twi_node->children, siblings)
     {

-        if (counter++ >= dctx->index) {
-            dctx->index = counter;
-            dctx->read_complete_callback(
-              dctx, pos->name.value, pos->name.len, pos->itype);
+        if (counter++ >= file->f_pos) {
+            fsapi_dir_report(
+              dctx, pos->name.value, pos->name.len, vfs_get_dtype(pos->itype));

             return 1;
         }
     }
             return 1;
         }
     }


@@ -180,7 +210,7 @@ __twifs_openfile(struct v_inode* inode, struct v_file* file)
 int
 twifs_rm_node(struct twifs_node* node)
 {
 int
 twifs_rm_node(struct twifs_node* node)
 {

-    if ((node->itype & VFS_IFDIR) && !llist_empty(&node->children)) {
+    if (check_itype(node->itype, VFS_IFDIR) && !llist_empty(&node->children)) {

         return ENOTEMPTY;
     }
     llist_delete(&node->siblings);
         return ENOTEMPTY;
     }
     llist_delete(&node->siblings);


@@ -188,16 +218,22 @@ twifs_rm_node(struct twifs_node* node)
     return 0;
 }
 
     return 0;
 }
 

+struct twifs_node*
+twifs_file_node_vargs(struct twifs_node* parent, const char* fmt, va_list args)
+{
+    char buf[VFS_NAME_MAXLEN];
+    size_t len = ksnprintfv(buf, fmt, VFS_NAME_MAXLEN, args);
+
+    return __twifs_new_node(parent ? parent : fs_root, buf, len, F_FILE);
+}
+

 struct twifs_node*
 twifs_file_node(struct twifs_node* parent, const char* fmt, ...)
 {
     va_list args;
     va_start(args, fmt);
 
 struct twifs_node*
 twifs_file_node(struct twifs_node* parent, const char* fmt, ...)
 {
     va_list args;
     va_start(args, fmt);
 

-    char buf[VFS_NAME_MAXLEN];
-    size_t len = __ksprintf_internal(buf, fmt, VFS_NAME_MAXLEN, args);
-    struct twifs_node* twi_node =
-      __twifs_new_node(parent ? parent : fs_root, buf, len, VFS_IFSEQDEV);
+    struct twifs_node* twi_node = twifs_file_node_vargs(parent, fmt, args);

 
     va_end(args);
 
 
     va_end(args);
 


@@ -211,7 +247,7 @@ twifs_dir_node(struct twifs_node* parent, const char* fmt, ...)
     va_start(args, fmt);
 
     char buf[VFS_NAME_MAXLEN];
     va_start(args, fmt);
 
     char buf[VFS_NAME_MAXLEN];

-    size_t len = __ksprintf_internal(buf, fmt, VFS_NAME_MAXLEN, args);
+    size_t len = ksnprintfv(buf, fmt, VFS_NAME_MAXLEN, args);

     struct twifs_node* twi_node =
       __twifs_new_node(parent ? parent : fs_root, buf, len, VFS_IFDIR);
 
     struct twifs_node* twi_node =
       __twifs_new_node(parent ? parent : fs_root, buf, len, VFS_IFDIR);
 


@@ -223,22 +259,52 @@ twifs_dir_node(struct twifs_node* parent, const char* fmt, ...)
 void
 twifs_init()
 {
 void
 twifs_init()
 {

+    struct filesystem* fs;
+    fs = fsapi_fs_declare("twifs", FSTYPE_PSEUDO | FSTYPE_ROFS);
+    
+    fsapi_fs_set_mntops(fs, __twifs_mount, __twifs_unmount);
+    fsapi_fs_finalise(fs);
+

     twi_pile = cake_new_pile("twifs_node", sizeof(struct twifs_node), 1, 0);
     twi_pile = cake_new_pile("twifs_node", sizeof(struct twifs_node), 1, 0);

+    fs_root = twifs_dir_node(NULL, NULL, 0, 0);
+}
+EXPORT_FILE_SYSTEM(twifs, twifs_init);
+
+void
+twifs_register_plugins()
+{
+    ldga_invoke_fn0(twiplugin_inits);
+}
+
+int
+__twifs_twimap_file_read(struct v_inode* inode,
+                         void* buf,
+                         size_t len,
+                         size_t fpos)
+{
+    struct twimap* map = twinode_getdata(inode, struct twimap*);
+    return twimap_read(map, buf, len, fpos);
+}

 
 

-    struct filesystem* twifs = vzalloc(sizeof(struct filesystem));
-    twifs->fs_name = HSTR("twifs", 5);
-    twifs->mount = __twifs_mount;
-    twifs->types = FSTYPE_ROFS;
-    twifs->fs_id = 0;
+struct twimap*
+twifs_mapping(struct twifs_node* parent, void* data, const char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);

 
 

-    fsm_register(twifs);
+    struct twimap* map = twimap_create(data);
+    struct twifs_node* node = twifs_file_node_vargs(parent, fmt, args);
+    node->ops.read = __twifs_twimap_file_read;
+    node->data = map;

 
 

-    fs_root = twifs_dir_node(NULL, NULL, 0, 0);
+    return map;

 }
 
 const struct v_file_ops twifs_file_ops = { .close = default_file_close,
                                            .read = __twifs_fread,
 }
 
 const struct v_file_ops twifs_file_ops = { .close = default_file_close,
                                            .read = __twifs_fread,

+                                           .read_page = __twifs_fread_pg,

                                            .write = __twifs_fwrite,
                                            .write = __twifs_fwrite,

+                                           .write_page = __twifs_fwrite_pg,

                                            .readdir = __twifs_iterate_dir };
 
 const struct v_inode_ops twifs_inode_ops = { .dir_lookup = __twifs_dirlookup,
                                            .readdir = __twifs_iterate_dir };
 
 const struct v_inode_ops twifs_inode_ops = { .dir_lookup = __twifs_dirlookup,