fix refcount issue

4 files changed, 18 insertions, 20 deletions

diff --git a/kernel/fs/namev.c b/kernel/fs/namev.c
index 343f02c..5146165 100644
--- a/kernel/fs/namev.c
+++ b/kernel/fs/namev.c
@@ -232,7 +232,7 @@ long namev_dir(vnode_t *base, const char *path, vnode_t **res_vnode,
     vref(dir);
 
     // Tokenize the path
-    const char *token = NULL;
+    char *token = NULL;
     size_t len = 0;
     while ((token = namev_tokenize(&path, &len)) && len > 0)
     {
diff --git a/kernel/fs/open.c b/kernel/fs/open.c
index 811a9c4..8f0d893 100644
--- a/kernel/fs/open.c
+++ b/kernel/fs/open.c
@@ -100,6 +100,7 @@ long do_open(const char *filename, int oflags)
     // Check if the vnode is a directory
     if (S_ISDIR(res_vnode->vn_mode) && ((oflags & O_WRONLY) || (oflags & O_RDWR)))
     {
+        vput(&res_vnode);
         return -EISDIR;
     }
 
@@ -156,9 +157,6 @@ long do_open(const char *filename, int oflags)
         return -ENOMEM;
     }
 
-
-    // Set the file descriptor
-    // curproc->p_files[fd] = file;
     vput(&res_vnode);
     return fd;
 }
diff --git a/kernel/fs/vfs_syscall.c b/kernel/fs/vfs_syscall.c
index ba4aa0c..205020b 100644
--- a/kernel/fs/vfs_syscall.c
+++ b/kernel/fs/vfs_syscall.c
@@ -143,8 +143,7 @@ ssize_t do_write(int fd, const void *buf, size_t len)
     // Check if the write was successful
     if (bytes_written < 0)
     {
-        // fput(&file);
-        dbg(DBG_PRINT, "VFS: do_write: write failed\n");
+        fput(&file);
         return bytes_written;
     }
 
@@ -182,8 +181,8 @@ long do_close(int fd)
     }
 
     // Close the file
-    curproc->p_files[fd] = NULL;
     fput(&file);
+    fput(&curproc->p_files[fd]);
 
     return 0;
 }
@@ -219,6 +218,7 @@ long do_dup(int fd)
     long ret = get_empty_fd(&new_fd);
     if (ret < 0)
     {
+        fput(&file);
         return ret;
     }
 
@@ -266,6 +266,7 @@ long do_dup2(int ofd, int nfd)
     file_t *new_file = fget(nfd);
     if (new_file != NULL)
     {
+        fput(&new_file);
         do_close(nfd);
     }
 
@@ -305,6 +306,7 @@ long do_mknod(const char *path, int mode, devid_t devid)
     vnode_t *vnode = NULL;
     vnode_t *base = curproc->p_cwd;
     long ret = namev_open(base, path, O_CREAT, mode, devid, &vnode);
+    vput(&vnode);
     return ret;
 }
 
@@ -367,10 +369,16 @@ long do_mkdir(const char *path)
     }
 
     // Create the directory
-    ret = dir->vn_ops->mkdir(dir, name, len, &base);
-    // vput(&base);
+    long err = dir->vn_ops->mkdir(dir, name, len, &base);
+    if (err < 0)
+    {
+        vput(&dir);
+        return err;
+    }
+    
+    vput(&base);
     vput(&dir);
-    return ret;
+    return 0;
 }
 
 /*
@@ -452,11 +460,11 @@ long do_rmdir(const char *path)
         return -ENOTDIR;
     }
 
+    vput(&base);
     // Remove the directory
     vlock(dir);
     ret = dir->vn_ops->rmdir(dir, name, len);
     vunlock(dir);
-    vput(&base);
     vput(&dir);
 
     return ret;
@@ -524,12 +532,11 @@ long do_unlink(const char *path)
         return -EPERM;
     }
 
+    vput(&base);
     // Call the unlink operation
     vlock(dir);
     ret = dir->vn_ops->unlink(dir, name, len);
     vunlock(dir);
-
-    vput(&base);
     vput(&dir);
 
     return ret;
@@ -587,14 +594,12 @@ long do_link(const char *oldpath, const char *newpath)
     if (!S_ISDIR(dir->vn_mode))
     {
         vput(&old_vnode);
-        vput(&dir);
         return -ENOTDIR;
     }
     // Check if name is too long
     if (len > NAME_LEN)
     {
         vput(&old_vnode);
-        vput(&dir);
         return -ENAMETOOLONG;
     }
 
@@ -657,7 +662,6 @@ long do_rename(const char *oldpath, const char *newpath)
     // Check if the old directory is a directory
     if (!S_ISDIR(old_dir->vn_mode))
     {
-        vput(&old_dir);
         return -ENOTDIR;
     }
 
@@ -676,7 +680,6 @@ long do_rename(const char *oldpath, const char *newpath)
     if (!S_ISDIR(new_dir->vn_mode))
     {
         vput(&old_dir);
-        vput(&new_dir);
         return -ENOTDIR;
     }
 
@@ -684,7 +687,6 @@ long do_rename(const char *oldpath, const char *newpath)
     if (old_len > NAME_LEN || new_len > NAME_LEN)
     {
         vput(&old_dir);
-        vput(&new_dir);
         return -ENAMETOOLONG;
     }
 
diff --git a/kernel/fs/vnode_specials.c b/kernel/fs/vnode_specials.c
index 3e55830..fb6df0b 100644
--- a/kernel/fs/vnode_specials.c
+++ b/kernel/fs/vnode_specials.c
@@ -124,8 +124,6 @@ static ssize_t chardev_file_read(vnode_t *file, size_t pos, void *buf,
     vlock(file);
 
     return ret;
-
-    return 0;
 }
 
 /*