From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/fs/coda/file.c | 75 ++++++++++++++++++++++++++-----------
1 files changed, 52 insertions(+), 23 deletions(-)
diff --git a/kernel/fs/coda/file.c b/kernel/fs/coda/file.c
index 43d3715..128d63d 100644
--- a/kernel/fs/coda/file.c
+++ b/kernel/fs/coda/file.c
@@ -20,10 +20,10 @@
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
+#include <linux/uio.h>
#include <linux/coda.h>
-#include <linux/coda_psdev.h>
-
+#include "coda_psdev.h"
#include "coda_linux.h"
#include "coda_int.h"
@@ -38,11 +38,25 @@
coda_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
struct file *coda_file = iocb->ki_filp;
- struct coda_file_info *cfi = CODA_FTOC(coda_file);
+ struct inode *coda_inode = file_inode(coda_file);
+ struct coda_file_info *cfi = coda_ftoc(coda_file);
+ loff_t ki_pos = iocb->ki_pos;
+ size_t count = iov_iter_count(to);
+ ssize_t ret;
- BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
+ ret = venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+ &cfi->cfi_access_intent,
+ count, ki_pos, CODA_ACCESS_TYPE_READ);
+ if (ret)
+ goto finish_read;
- return vfs_iter_read(cfi->cfi_container, to, &iocb->ki_pos, 0);
+ ret = vfs_iter_read(cfi->cfi_container, to, &iocb->ki_pos, 0);
+
+finish_read:
+ venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+ &cfi->cfi_access_intent,
+ count, ki_pos, CODA_ACCESS_TYPE_READ_FINISH);
+ return ret;
}
static ssize_t
@@ -50,13 +64,18 @@
{
struct file *coda_file = iocb->ki_filp;
struct inode *coda_inode = file_inode(coda_file);
- struct coda_file_info *cfi = CODA_FTOC(coda_file);
- struct file *host_file;
+ struct coda_file_info *cfi = coda_ftoc(coda_file);
+ struct file *host_file = cfi->cfi_container;
+ loff_t ki_pos = iocb->ki_pos;
+ size_t count = iov_iter_count(to);
ssize_t ret;
- BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
+ ret = venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+ &cfi->cfi_access_intent,
+ count, ki_pos, CODA_ACCESS_TYPE_WRITE);
+ if (ret)
+ goto finish_write;
- host_file = cfi->cfi_container;
file_start_write(host_file);
inode_lock(coda_inode);
ret = vfs_iter_write(cfi->cfi_container, to, &iocb->ki_pos, 0);
@@ -65,6 +84,11 @@
coda_inode->i_mtime = coda_inode->i_ctime = current_time(coda_inode);
inode_unlock(coda_inode);
file_end_write(host_file);
+
+finish_write:
+ venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+ &cfi->cfi_access_intent,
+ count, ki_pos, CODA_ACCESS_TYPE_WRITE_FINISH);
return ret;
}
@@ -99,16 +123,15 @@
static int
coda_file_mmap(struct file *coda_file, struct vm_area_struct *vma)
{
- struct coda_file_info *cfi;
+ struct inode *coda_inode = file_inode(coda_file);
+ struct coda_file_info *cfi = coda_ftoc(coda_file);
+ struct file *host_file = cfi->cfi_container;
+ struct inode *host_inode = file_inode(host_file);
struct coda_inode_info *cii;
- struct file *host_file;
- struct inode *coda_inode, *host_inode;
struct coda_vm_ops *cvm_ops;
+ loff_t ppos;
+ size_t count;
int ret;
-
- cfi = CODA_FTOC(coda_file);
- BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
- host_file = cfi->cfi_container;
if (!host_file->f_op->mmap)
return -ENODEV;
@@ -116,12 +139,18 @@
if (WARN_ON(coda_file != vma->vm_file))
return -EIO;
+ count = vma->vm_end - vma->vm_start;
+ ppos = vma->vm_pgoff * PAGE_SIZE;
+
+ ret = venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+ &cfi->cfi_access_intent,
+ count, ppos, CODA_ACCESS_TYPE_MMAP);
+ if (ret)
+ return ret;
+
cvm_ops = kmalloc(sizeof(struct coda_vm_ops), GFP_KERNEL);
if (!cvm_ops)
return -ENOMEM;
-
- coda_inode = file_inode(coda_file);
- host_inode = file_inode(host_file);
cii = ITOC(coda_inode);
spin_lock(&cii->c_lock);
@@ -194,6 +223,8 @@
cfi->cfi_magic = CODA_MAGIC;
cfi->cfi_mapcount = 0;
cfi->cfi_container = host_file;
+ /* assume access intents are supported unless we hear otherwise */
+ cfi->cfi_access_intent = true;
BUG_ON(coda_file->private_data != NULL);
coda_file->private_data = cfi;
@@ -209,8 +240,7 @@
struct inode *host_inode;
int err;
- cfi = CODA_FTOC(coda_file);
- BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
+ cfi = coda_ftoc(coda_file);
err = venus_close(coda_inode->i_sb, coda_i2f(coda_inode),
coda_flags, coda_file->f_cred->fsuid);
@@ -252,8 +282,7 @@
return err;
inode_lock(coda_inode);
- cfi = CODA_FTOC(coda_file);
- BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
+ cfi = coda_ftoc(coda_file);
host_file = cfi->cfi_container;
err = vfs_fsync(host_file, datasync);
--
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