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update dfs_jffs2.c (note: there are some bugs in jffs2 when multi-threads writes and read) 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1994 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
goprife@gmail.com 2012-03-10 14:41:11 +00:00
parent 2a52fefd5f
commit 484af67a52
2 changed files with 57 additions and 40 deletions
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52
components/dfs/filesystems/jffs2/dfs_jffs2.c
View File

@ -37,7 +37,9 @@ struct device_part
struct cyg_mtab_entry * mte;
struct rt_mtd_device *dev;
};
static struct device_part device_partition[DEVICE_PART_MAX] = {0};
static struct device_part device_partition[DEVICE_PART_MAX] = {0};
static struct rt_mutex jffs2_lock;
#define jffs2_mount jffs2_fste.mount
#define jffs2_umount jffs2_fste.umount
@ -285,19 +287,21 @@ static int dfs_jffs2_open(struct dfs_fd* file)
if (oflag & DFS_O_DIRECTORY) /* operations about dir */
{
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
if (oflag & DFS_O_CREAT) /* create a dir*/
{
/* fixme, should test file->path can end with '/' */
result = jffs2_mkdir(mte, mte->root, name);
if (result)
{
rt_mutex_release(&jffs2_lock);
rt_free(jffs2_file);
return jffs2_result_to_dfs(result);
}
}
/* open dir */
result = jffs2_opendir(mte, mte->root, name, jffs2_file);
rt_mutex_release(&jffs2_lock);
if (result)
{
rt_free(jffs2_file);
@ -322,10 +326,11 @@ static int dfs_jffs2_open(struct dfs_fd* file)
/* Creates a new file. The function fails if the file is already existing. */
if (oflag & DFS_O_EXCL) mode |= JFFS2_O_EXCL;
// if (oflag & DFS_O_APPEND) mode |= JFFS2_O_APPEND;
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_open(mte, 0, name, mode, jffs2_file);
if (result != 0)
{
rt_mutex_release(&jffs2_lock);
rt_free(jffs2_file);
return jffs2_result_to_dfs(result);
}
@ -337,6 +342,7 @@ static int dfs_jffs2_open(struct dfs_fd* file)
file->size = 0;
jffs2_file_lseek(jffs2_file, (off_t *)(&(file->size)), SEEK_END);
jffs2_file->f_offset = (off_t)file->pos;
rt_mutex_release(&jffs2_lock);
if (oflag & DFS_O_APPEND)
{
@ -356,7 +362,9 @@ static int dfs_jffs2_close(struct dfs_fd* file)
if (file->flags & DFS_O_DIRECTORY) /* operations about dir */
{
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_dir_colse(jffs2_file);
rt_mutex_release(&jffs2_lock);
if (result)
return jffs2_result_to_dfs(result);
@ -364,7 +372,9 @@ static int dfs_jffs2_close(struct dfs_fd* file)
return 0;
}
/* regular file operations */
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_file_colse(jffs2_file);
rt_mutex_release(&jffs2_lock);
if (result)
return jffs2_result_to_dfs(result);
@ -396,7 +406,9 @@ static int dfs_jffs2_read(struct dfs_fd* file, void* buf, rt_size_t len)
uio_s.uio_resid = uio_s.uio_iov->iov_len; //seem no use in jffs2;
char_read = jffs2_file->f_offset; /* the current offset */
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_file_read(jffs2_file, &uio_s);
rt_mutex_release(&jffs2_lock);
if (result)
return jffs2_result_to_dfs(result);
@ -426,7 +438,9 @@ static int dfs_jffs2_write(struct dfs_fd* file,
uio_s.uio_resid = uio_s.uio_iov->iov_len; //seem no use in jffs2;
char_write = jffs2_file->f_offset;
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_file_write(jffs2_file, &uio_s);
rt_mutex_release(&jffs2_lock);
if (result)
return jffs2_result_to_dfs(result);
@ -453,7 +467,9 @@ static int dfs_jffs2_lseek(struct dfs_fd* file,
jffs2_file = (cyg_file *)(file->data);
/* set offset as current offset */
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_file_lseek(jffs2_file, &offset, SEEK_SET);
rt_mutex_release(&jffs2_lock);
if (result)
return jffs2_result_to_dfs(result);
/* update file position */
@ -509,8 +525,9 @@ static int dfs_jffs2_getdents(struct dfs_fd* file,
while (1)
{
d = dirp + index;
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_dir_read(jffs2_file, &uio_s);
rt_mutex_release(&jffs2_lock);
/* if met a error or all entry are read over, break while*/
if (result || jffs2_d.d_name[0] == 0)
break;
@ -537,9 +554,9 @@ static int dfs_jffs2_getdents(struct dfs_fd* file,
}
else
rt_sprintf(fullname, "%s/%s", file->path, jffs2_d.d_name);
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_porting_stat(mte, mte->root, fullname, (void *)&s);
rt_mutex_release(&jffs2_lock);
if (result)
return jffs2_result_to_dfs(result);
@ -581,10 +598,14 @@ static int dfs_jffs2_unlink(struct dfs_filesystem* fs, const char* path)
path++;
/* judge file type, dir is to be delete by rmdir, others by unlink */
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_porting_stat(mte, mte->root, path, (void *)&s);
if (result)
{
rt_mutex_release(&jffs2_lock);
return jffs2_result_to_dfs(result);
}
switch(s.st_mode & JFFS2_S_IFMT)
{
case JFFS2_S_IFREG:
@ -595,8 +616,10 @@ static int dfs_jffs2_unlink(struct dfs_filesystem* fs, const char* path)
break;
default:
/* unknown file type */
rt_mutex_release(&jffs2_lock);
return -1;
}
rt_mutex_release(&jffs2_lock);
if (result)
return jffs2_result_to_dfs(result);
return 0;
@ -617,8 +640,9 @@ static int dfs_jffs2_rename(struct dfs_filesystem* fs,
oldpath += 1;
if (*newpath == '/')
newpath += 1;
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_rename(mte, mte->root, oldpath, mte->root, newpath);
rt_mutex_release(&jffs2_lock);
if (result)
return jffs2_result_to_dfs(result);
return 0;
@ -640,8 +664,9 @@ static int dfs_jffs2_stat(struct dfs_filesystem* fs, const char *path, struct st
if (result)
return -DFS_STATUS_ENOENT;
// result = jffs2_ops_stat(mte, mte->root, path, &s);
rt_mutex_take(&jffs2_lock, RT_WAITING_FOREVER);
result = jffs2_porting_stat(mte, mte->root, path, (void *)&s);
rt_mutex_release(&jffs2_lock);
if (result)
return jffs2_result_to_dfs(result);
@ -673,7 +698,9 @@ static int dfs_jffs2_stat(struct dfs_filesystem* fs, const char *path, struct st
static const struct dfs_filesystem_operation dfs_jffs2_ops =
{
"jffs2", /* file system type: jffs2 */
#if RTTHREAD_VERSION >= 10100
DFS_FS_FLAG_DEFAULT, /* use Relative Path */
#endif
dfs_jffs2_mount,
dfs_jffs2_unmount,
dfs_jffs2_mkfs,
@ -696,6 +723,11 @@ int dfs_jffs2_init(void)
{
/* register fatfs file system */
dfs_register(&dfs_jffs2_ops);
/* initialize mutex */
if (rt_mutex_init(&jffs2_lock, "jffs2lock", RT_IPC_FLAG_FIFO) != RT_EOK)
{
rt_kprintf("init jffs2 lock mutex failed\n");
}
rt_kprintf("init jffs2 lock mutex okay\n");
return 0;
}

45
components/dfs/filesystems/jffs2/kernel/asm/semaphore.h
View File

@ -1,23 +1,23 @@
#ifndef __ASM_SEMAPHORE_H__
#define __ASM_SEMAPHORE_H__
#define CONFIG_JFFS2_SEMAPHORE 1 // no mutex, 1 use static, 2 use dynamic
#define CONFIG_JFFS2_SEMAPHORE 0 // no mutex, 1 use static, 2 use dynamic
#if CONFIG_JFFS2_SEMAPHORE == 0
#include <cyg/hal/drv_api.h>
//#include <cyg/hal/drv_api.h>
struct semaphore {
cyg_drv_mutex_t x;
int x;
};
#define DECLARE_MUTEX(x) //struct semaphore x = { { 0 } };
#define DECLARE_MUTEX_LOCKED(x) //struct semaphore x = { { 1 } };
#define DECLARE_MUTEX(x)
#define DECLARE_MUTEX_LOCKED(x)
#define init_MUTEX(struct semaphore * sem) //cyg_drv_mutex_init((cyg_drv_mutex_t *)sem)
#define init_MUTEX_LOCKED(struct semaphore * sem) //do { cyg_drv_mutex_init((cyg_drv_mutex_t *)sem); cyg_drv_mutex_lock((cyg_drv_mutex_t *)sem); } while(0)
#define down(struct semaphore * sem) //cyg_drv_mutex_lock((cyg_drv_mutex_t *)sem)
#define down_interruptible(struct semaphore * sem) 0//({ cyg_drv_mutex_lock((cyg_drv_mutex_t *)sem), 0; })
#define down_trylock(struct semaphore * sem) //cyg_drv_mutex_trylock((cyg_drv_mutex_t *)sem)
#define up(struct semaphore * sem) //cyg_drv_mutex_unlock((cyg_drv_mutex_t *)sem)
#define init_MUTEX(sem)
#define init_MUTEX_LOCKED(sem)
#define down(sem)
#define down_interruptible(sem) 0
#define down_trylock(sem)
#define up(sem)
#elif CONFIG_JFFS2_SEMAPHORE == 1
#include <rtthread.h>
@ -42,36 +42,21 @@ rt_inline void init_MUTEX(struct semaphore * sem)
rt_inline void init_MUTEX_LOCKED(struct semaphore * sem)
{
rt_enter_critical();
if (rt_mutex_init((rt_mutex_t)sem, "mutex", RT_IPC_FLAG_FIFO) == RT_EOK)
{
/* detach the object from system object container */
rt_object_detach(&(((rt_mutex_t)sem)->parent.parent));
rt_exit_critical();
rt_mutex_take((rt_mutex_t)sem, RT_WAITING_FOREVER);
return;
}
rt_exit_critical();
rt_kprintf("get an error at %s:%d \n", __FUNCTION__, __LINE__);
RT_ASSERT(0);
}
/*
rt_inline void init_MUTEX(struct semaphore * sem)
{
if (rt_mutex_init((rt_mutex_t)sem, "mutex", RT_IPC_FLAG_FIFO) == RT_EOK)
return;
rt_kprintf("get an error at %s:%d \n", __FUNCTION__, __LINE__);
RT_ASSERT(0);
}
rt_inline init_MUTEX_LOCKED(struct semaphore * sem)
{
if (rt_mutex_init((rt_mutex_t)sem, "mutex", RT_IPC_FLAG_FIFO) == RT_EOK)
{
rt_mutex_take((rt_mutex_t)sem, RT_WAITING_FOREVER);
return;
}
rt_kprintf("get an error at %s:%d \n", __FUNCTION__, __LINE__);
RT_ASSERT(0);
}
*/
rt_inline down(struct semaphore * sem)
{
rt_mutex_take((rt_mutex_t)sem, RT_WAITING_FOREVER);