From: AceVest <zhaoyanbai@126.com>
Date: Tue, 8 Jul 2014 15:54:15 +0000 (+0800)
Subject: read ext2 super block
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/static/doc/zpipe.c?a=commitdiff_plain;h=a32adfac2f23c19407ff25527b84eea6425a7525;p=kernel.git

read ext2 super block
---

diff --git a/Makefile b/Makefile
index a698a4d..b7b3542 100644
--- a/Makefile
+++ b/Makefile
@@ -37,5 +37,5 @@ install:
 	md5sum /boot/KERNEL.BIN
 	md5sum KERNEL.BIN
 
-copy:
+cp:
 	./scripts/copy.sh
diff --git a/boot/cmdline.c b/boot/cmdline.c
index b37eaaf..2476d30 100644
--- a/boot/cmdline.c
+++ b/boot/cmdline.c
@@ -41,6 +41,6 @@ void parse_cmdline(const char *cmdline)
     get_value("root", value);
     printk("root device %s\n", value);
     assert(value[0]=='h' && value[1]=='d' && value[2] == 'a');
-    system.root_dev = MAKE_DEV(DEV_MAJOR_HD, atoi(value+3));
+    system.root_dev = MAKE_DEV(DEV_MAJOR_HDA, atoi(value+3));
     printk("root device %08x\n", system.root_dev);
 }
diff --git a/drivers/blk_rw.c b/drivers/blk_rw.c
new file mode 100644
index 0000000..2b7865f
--- /dev/null
+++ b/drivers/blk_rw.c
@@ -0,0 +1,33 @@
+/*
+ * ------------------------------------------------------------------------
+ *   File Name: blk_rw.c
+ *      Author: Zhao Yanbai
+ *              Tue Jul  8 22:21:37 2014
+ * Description: none
+ * ------------------------------------------------------------------------
+ */
+
+#include <fs.h>
+#include <ide.h>
+#include <system.h>
+
+// only support read
+void blk_rw(dev_t dev, u64_t offset, u32_t size, char *buf)
+{
+    assert(DEV_MAJOR(dev) == DEV_MAJOR_HDA);
+    assert(offset % SECT_SIZE == 0);
+    assert(size % SECT_SIZE == 0);
+
+    const part_t *p = ide_get_part(dev);
+
+    u64_t lba = p->lba_start;
+    lba += offset / SECT_SIZE;
+
+    assert(lba < p->lba_end);
+
+    u32_t scnt = size / SECT_SIZE;
+
+    printk("%s lba %u scnt %u\n", __func__, (u32_t)lba, scnt);
+
+    ide_do_read(lba, scnt, buf);
+}
diff --git a/drivers/ide.c b/drivers/ide.c
index 56f8902..1e4be54 100644
--- a/drivers/ide.c
+++ b/drivers/ide.c
@@ -14,7 +14,6 @@
 #include <ide.h>
 #include <irq.h>
 #include <pci.h>
-#include <system.h>
 #include <semaphore.h>
 #include <wait.h>
 #include <string.h>
@@ -50,6 +49,7 @@ typedef struct prd
 typedef struct {
     u64_t   lba;
     u32_t   scnt;
+    u32_t   read_scnt;
     char    *buf;
     bool    finish;
     wait_queue_head_t wait;
@@ -80,6 +80,7 @@ void ide_printl()
 
 void ide_cmd_out(dev_t dev, u32 sect_cnt, u64 sect_nr, u32 cmd)
 {
+    printk("sect_cnt %u sect_nr %u \n", sect_cnt, (u32)sect_nr);
     drv.pio_cnt++;
     drv.read_mode = cmd;
 
@@ -101,6 +102,14 @@ void ide_cmd_out(dev_t dev, u32 sect_cnt, u64 sect_nr, u32 cmd)
     outb(cmd,                       REG_CMD(dev));
 }
 
+part_t *ide_get_part(dev_t dev)
+{
+    assert(DEV_MAJOR(dev) == DEV_MAJOR_HDA);
+    assert(DEV_MINOR(dev) < MAX_SUPPORT_PARTITION_CNT);
+
+    return drv.part + DEV_MINOR(dev);
+}
+
 void ide_do_read(u64_t lba, u32_t scnt, char *buf)
 {
     bool finish = false;
@@ -112,6 +121,7 @@ void ide_do_read(u64_t lba, u32_t scnt, char *buf)
 
     r->lba = lba;
     r->scnt= scnt;
+    r->read_scnt= 0;
     r->buf = buf;
     r->finish = false;
     init_wait_queue(&r->wait);
@@ -220,6 +230,7 @@ void init_pci_controller(unsigned int classcode)
 
 void ide_default_intr()
 {
+    printk("%s\n", __func__);
     u8_t status = inb(REG_STATUS(0));
 
     drv.irq_cnt++;
@@ -237,7 +248,8 @@ void ide_default_intr()
     u16_t sig = 0;
     if(drv.read_mode == HD_CMD_READ_EXT)
     {
-        insl(REG_DATA(0), ide_request.buf, ((ide_request.scnt*SECT_SIZE)>>2));
+        insl(REG_DATA(0), ide_request.buf + ide_request.read_scnt*(SECT_SIZE), (SECT_SIZE)>>2);
+        ide_request.read_scnt++;
         sig = *((u16_t *) (ide_request.buf+510));
     }
 
@@ -254,7 +266,11 @@ void ide_default_intr()
     outb(PCI_IDE_CMD_STOP, drv.bus_cmd);
 
     wake_up(&ide_request.wait);
-    ide_request.finish = true;
+    if(drv.read_mode == HD_CMD_READ_EXT)
+    {
+        if(ide_request.read_scnt == ide_request.scnt)
+            ide_request.finish = true;
+    }
 
     up(&mutex);
 }
diff --git a/drivers/ide.h b/drivers/ide.h
index 9f66dd9..fecae71 100644
--- a/drivers/ide.h
+++ b/drivers/ide.h
@@ -9,6 +9,8 @@
 
 #pragma once
 
+#include <system.h>
+
 extern unsigned int HD_CHL0_CMD_BASE;
 extern unsigned int HD_CHL1_CMD_BASE;
 extern unsigned int HD_CHL0_CTL_BASE;
@@ -126,3 +128,6 @@ typedef struct {
     u64_t   lba_start;
     u64_t   lba_end;
 } part_t;
+
+void ide_do_read(u64_t lba, u32_t scnt, char *buf);
+part_t *ide_get_part(dev_t dev);
diff --git a/fs/bak.ext2.c b/fs/bak.ext2.c
index bc0df52..11f7641 100644
--- a/fs/bak.ext2.c
+++ b/fs/bak.ext2.c
@@ -10,6 +10,7 @@
  *--------------------------------------------------------------------------
  */
 
+#if 0
 #include <fs.h>
 #include <system.h>
 #include <string.h>
@@ -315,3 +316,4 @@ static void ext2_print_inode(pInode p)
     printk("i_mode:%04x i_size:%d i_blocks:%d\n",
         p->i_mode, p->i_size, p->i_blocks);
 }
+#endif
diff --git a/fs/ext2.c b/fs/ext2.c
index b815ed7..ce08dec 100644
--- a/fs/ext2.c
+++ b/fs/ext2.c
@@ -6,4 +6,50 @@
  * Description: none
  * ------------------------------------------------------------------------
  */
+#include "system.h"
+#include "fs.h"
 #include "ext2.h"
+
+struct {
+    ext2_sb_t ext2_sb;
+} ext2_fs;
+
+extern void blk_rw(dev_t dev, u64_t offset, u32_t scnt, char *buf);
+
+#define BLKRW(offset, blkcnt, buf) do { blk_rw(system.root_dev, offset, (blkcnt)*EXT2_BLOCK_SIZE, buf); } while(0)
+
+void ext2_setup_fs()
+{
+    memset(&ext2_fs, 0, sizeof(ext2_fs));
+
+    char *buf = kmalloc(EXT2_BLOCK_SIZE, 0);
+    if(buf == 0)
+        panic("out of memory");
+
+    printk("EXT2_BLOCK_SIZE %u\n", EXT2_BLOCK_SIZE);
+
+    BLKRW(EXT2_SB_OFFSET, 1, buf);
+
+    memcpy(EXT2_SB, buf, sizeof(*(EXT2_SB)));
+
+    if(EXT2_SB->s_magic != EXT2_SUPER_MAGIC)
+    {
+        printk("file system magic %04x\n", EXT2_SB->s_magic);
+        panic("only support ext2 file system...");
+    }
+
+    printk("Ext2 File System Information:\n");
+    printk("inodes cnt %u blocks cnt %u free blocks %u free inodes %u\n",
+        EXT2_SB->s_inodes_count, EXT2_SB->s_blocks_count, EXT2_SB->s_free_blocks_count, EXT2_SB->s_free_inodes_count);
+    printk("block size %u log block size %u first data block %u\n",
+        EXT2_BLOCK_SIZE, EXT2_SB->s_log_block_size, EXT2_SB->s_first_data_block);
+    printk("blocks per group %u inodes per group %u\n", EXT2_SB->s_blocks_per_group, EXT2_SB->s_inodes_per_group);
+}
+
+
+
+
+void setup_fs()
+{
+    ext2_setup_fs();
+}
diff --git a/fs/fs.c b/fs/fs.c
index c98d4ad..5b03ed2 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -15,13 +15,13 @@
 #include <system.h>
 #define SECT_SIZE    512
 
+#if 0
 File file_table[NR_FILES] __attribute__ ((__aligned__(PAGE_SIZE))) = {{0,},};
 extern unsigned int ext2_start_sect;
 void hd_read(dev_t dev, u64 sect_nr, void *buf, u32 count);
 void init_file_table();
 void save_boot_part(int n, pPartition p, u32 base_sect);
 void read_ext_part(u32 base, u32 offset);
-
 void setup_fs()
 {
     int i, minor;
@@ -122,3 +122,4 @@ void read_ext_part(u32 base, u32 offset)
 
     free_virt_pages(buf);
 }
+#endif
diff --git a/fs/open.c b/fs/open.c
index fb2c192..73fb164 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -20,6 +20,7 @@
 
 int sysc_open(const char *path, int flags, mode_t mode)
 {
+#if 0
     assert(mode == 0); // unsupport now...
     assert(flags == O_RDONLY);    // support only...
 
@@ -90,4 +91,5 @@ int sysc_open(const char *path, int flags, mode_t mode)
     current->fps[fd] = pf;
 
     return fd;
+#endif
 }
diff --git a/fs/read.c b/fs/read.c
index 3e2fc06..21db990 100644
--- a/fs/read.c
+++ b/fs/read.c
@@ -17,6 +17,7 @@
 
 int sysc_read(int fd, void *buf, size_t count)
 {
+#if 0
     if(fd<0 || fd>=NR_OPENS)
         return -EBADF;
 
@@ -30,4 +31,5 @@ int sysc_read(int fd, void *buf, size_t count)
 
 
     return read_file(inode, buf, count);
+#endif
 }
diff --git a/fs/stat.c b/fs/stat.c
index be4af97..ce412d1 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -17,6 +17,7 @@
 #include <memory.h>
 int sysc_stat(int fd, struct stat *stat)
 {
+#if 0
     if(fd<0 || fd>=NR_OPENS)
         return -EBADF;
 
@@ -39,6 +40,7 @@ int sysc_stat(int fd, struct stat *stat)
     stat->st_atime    = inode->i_atime;
     stat->st_mtime    = inode->i_mtime;
     stat->st_ctime    = inode->i_ctime;
+#endif
 
     return 0;
 }
diff --git a/include/ext2.h b/include/ext2.h
index befc6b2..4a4d525 100644
--- a/include/ext2.h
+++ b/include/ext2.h
@@ -19,6 +19,10 @@
 
 #include <types.h>
 
+#define EXT2_SUPER_MAGIC        0xEF53
+
+#define EXT2_SB_OFFSET          1024
+
 #define EXT2_BAD_INO            1
 #define EXT2_ROOT_INO           2
 #define EXT2_BOOT_LOADER_INO    5
@@ -28,6 +32,7 @@
 #define EXT2_MAX_BLOCK_SIZE     4096
 #define EXT2_MIN_BLOCK_LOG_SIZE 10
 
+#define EXT2_SB                 (&ext2_fs.ext2_sb)
 #define EXT2_BLOCK_SIZE        (EXT2_MIN_BLOCK_SIZE << (EXT2_SB)->s_log_block_size)
 
 #define EXT2_SECT_PER_BLOCK    (EXT2_BLOCK_SIZE/512)
diff --git a/include/fs.h b/include/fs.h
index fb4676c..1361a51 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -15,20 +15,6 @@
 
 #include <types.h>
 #include <page.h>
-#include <bak.ext2.h>
-
-typedef struct partition
-{
-    u8    State;
-    u8    Head;
-    u16    StartSC;
-    u8    Type;
-    u8    EndHead;
-    u16    EndSC;
-    u32    AbsoluteSectNo;
-    u32    PartitionSize;
-} Partition, *pPartition;
-
 
 /* 分区表开始的位置 */
 #define PARTS_POS    0x1BE
@@ -38,7 +24,7 @@ typedef struct partition
 #define DEV_MAJOR_MEM       0x0001
 #define DEV_MAJOR_TTY       0x0002
 #define DEV_MAJOR_IDE0      0x0003
-#define DEV_MAJOR_HD        DEV_MAJOR_IDE0
+#define DEV_MAJOR_HDA       DEV_MAJOR_IDE0
 #define DEV_MAJOR_IDE1      0x0004
 #define DEV_MAJOR_SCSI0     0x0005
 #define DEV_MAJOR_SCSI2     0x0006
@@ -53,13 +39,11 @@ typedef struct partition
 
 
 
-typedef struct
-{
-    int    count;
-    int    ino_nr;
-    pInode    inode;
-} File, *pFile;
+#define MAX_SUPT_FILE_SIZE    (1)
+#define NR_FILES    (1)
+#define NR_OPENS    (1)
 
+#if 0
 #define MAX_SUPT_FILE_SIZE    (EXT2_IND_BLOCK*EXT2_BLOCK_SIZE)
 #define NR_FILES    (PAGE_SIZE/sizeof(File))
 #define NR_INODES    (2*NR_FILES)
@@ -68,6 +52,12 @@ extern File file_table[NR_FILES];
 extern Inode inode_table[NR_INODES];
 
 
+typedef struct
+{
+    int    count;
+    int    ino_nr;
+    pInode    inode;
+} File, *pFile;
 
 
 static inline int get_inode_nr(const char *path)
@@ -103,5 +93,6 @@ static inline pInode find_empty_inode()
 
     return NULL;
 }
+#endif
 
 #endif //_FS_H
diff --git a/include/task.h b/include/task.h
index 3873c0e..13351a9 100644
--- a/include/task.h
+++ b/include/task.h
@@ -61,7 +61,7 @@ typedef union task_union
 
         list_head_t list;
 
-        pFile        fps[NR_OPENS];
+        //pFile        fps[NR_OPENS];
 
     };
 
diff --git a/kernel/sched.c b/kernel/sched.c
index fd9d475..ee480da 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -64,8 +64,10 @@ void init_root_tsk()
     strcpy(root_task.name, "root_task");
     INIT_LIST_HEAD(&root_task.list);
 
-    for(i=0; i<NR_OPENS; i++)
-        root_task.fps[i] = 0;
+
+    //  TODO
+    //for(i=0; i<NR_OPENS; i++)
+    //    root_task.fps[i] = 0;
 
     tss.esp0        = ((unsigned long)&root_task) + sizeof(root_task);
     root_task.esp0  = tss.esp0;
diff --git a/kernel/setup.c b/kernel/setup.c
index fbe4998..e0239e3 100644
--- a/kernel/setup.c
+++ b/kernel/setup.c
@@ -26,7 +26,6 @@ extern void setup_sysc();
 extern void setup_pci();
 extern void set_tss();
 extern void setup_tasks();
-extern void setup_root_dev();
 extern void ide_init();
 extern void setup_fs();
 extern void setup_ext2();
@@ -90,19 +89,11 @@ void setup_kernel()
     //switch_printk_screen();
     void ide_init();
     ide_init();
-    switch_printk_screen();
 
     detect_cpu();
 
     printk("%s\n", version);
 
-
-    return;
-    while(1); // TODO MODIFY CODE BELOW
-
-
-    setup_root_dev();
     setup_fs();
-    setup_ext2();
 }
 
diff --git a/kernel/syscall.c b/kernel/syscall.c
index 52ba90e..70bb508 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -48,6 +48,8 @@ int sysc_pause()
     return 0;
 }
 
+int sysc_test() { }
+
 void    init_sysc_handler_table()
 {
     int i;
diff --git a/kernel/system.c b/kernel/system.c
index 84586d4..26a9390 100644
--- a/kernel/system.c
+++ b/kernel/system.c
@@ -155,13 +155,6 @@ void set_tss()
     asm("ltr %%ax"::"a"((INDEX_TSS<<3)+3));
 }
 
-void setup_root_dev()
-{
-    unsigned char dev;
-    dev = (unsigned char)(system.boot_device >> 24);
-    printk("root device: %08x\n", system.root_dev);
-}
-
 int sysc_reboot(int mode)
 {
 
diff --git a/kernel/test.c b/kernel/test.c
deleted file mode 100644
index 45f467f..0000000
--- a/kernel/test.c
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- *--------------------------------------------------------------------------
- *   File Name: test.c
- * 
- *      Author: Zhao Yanbai [zhaoyanbai@126.com]
- *              Tue Feb 23 17:47:43 2010
- * 
- * Description: sysc_test
- * 
- *--------------------------------------------------------------------------
- */
-#include <syscall.h>
-#include <printk.h>
-#include <sched.h>
-
-void dump_fd()
-{
-    int i;
-    for(i=0; i<NR_OPENS; i++)
-    {
-        pFile pf = current->fps[i];
-        if(pf == NULL) continue;
-        printk("fd[%d]: %08x\n", i, pf);
-
-
-        pInode inode = pf->inode;
-        printk("file_desc ino_nr: %04d inode:%08x\n",
-            pf->ino_nr, inode);
-
-        printk("inode: size: %d\n", inode->i_size);
-    }
-}
-
-int sysc_test()
-{
-    //dump_fd();
-
-    printk(".");
-
-    return 0;
-}