Cache information interface and implementation for AMD and Intel on Linux

[palacios.git] / linux_module / iface-file.c

diff --git a/linux_module/iface-file.c b/linux_module/iface-file.c
index 46d4a28..e826296 100644 (file)
--- a/linux_module/iface-file.c
+++ b/linux_module/iface-file.c
@@ -161,7 +161,7 @@ static int palacios_file_mkdir(const char * pathname, unsigned short perms, int
     {
        dentry = kern_path_create(AT_FDCWD, pathname, &tmp_path, 1);
        
-       if (IS_ERR(dentry)) {
+       if (!dentry || IS_ERR(dentry)) {
            return 0;
        }
        
@@ -170,7 +170,7 @@ static int palacios_file_mkdir(const char * pathname, unsigned short perms, int
 #endif    
 
 
-    if (!IS_ERR(dentry)) {
+    if (!(!dentry || IS_ERR(dentry))) {
        ret = vfs_mkdir(path_ptr->dentry->d_inode, dentry, perms);
     }
 
@@ -218,9 +218,9 @@ static void * palacios_file_open(const char * path, int mode, void * private_dat
     pfile->mode |= O_LARGEFILE;
 
 
-    pfile->filp = filp_open(path, pfile->mode, 0);
+    pfile->filp = filp_open(path, pfile->mode, 0600);  // rw------- to start
     
-    if (IS_ERR(pfile->filp)) {
+    if (!pfile->filp || IS_ERR(pfile->filp)) {
        ERROR("Cannot open file: %s\n", path);
        palacios_free(pfile);
        return NULL;
@@ -237,7 +237,7 @@ static void * palacios_file_open(const char * path, int mode, void * private_dat
     strncpy(pfile->path, path, strlen(path));
     pfile->guest = guest;
     
-    spin_lock_init(&(pfile->lock));
+    palacios_spinlock_init(&(pfile->lock));
 
     if (guest == NULL) {
        list_add(&(pfile->file_node), &(global_files));
@@ -252,10 +252,16 @@ static void * palacios_file_open(const char * path, int mode, void * private_dat
 static int palacios_file_close(void * file_ptr) {
     struct palacios_file * pfile = (struct palacios_file *)file_ptr;
 
+    if (!pfile) {
+        return -1;
+    }
+
     filp_close(pfile->filp, NULL);
     
     list_del(&(pfile->file_node));
 
+    palacios_spinlock_deinit(&(pfile->lock));
+
     palacios_free(pfile->path);    
     palacios_free(pfile);
 
@@ -342,8 +348,14 @@ static int file_init( void ) {
 
 
 static int file_deinit( void ) {
-    if (!list_empty(&(global_files))) {
-       ERROR("Error removing module with open files\n");
+    struct palacios_file * pfile = NULL;
+    struct palacios_file * tmp = NULL;
+    
+    list_for_each_entry_safe(pfile, tmp, &(global_files), file_node) { 
+        filp_close(pfile->filp, NULL);
+        list_del(&(pfile->file_node));
+        palacios_free(pfile->path);    
+        palacios_free(pfile);
     }
 
     return 0;
@@ -368,9 +380,18 @@ static int guest_file_init(struct v3_guest * guest, void ** vm_data) {
 
 
 static int guest_file_deinit(struct v3_guest * guest, void * vm_data) {
+    struct vm_file_state * state = (struct vm_file_state *)vm_data;
+    struct palacios_file * pfile = NULL;
+    struct palacios_file * tmp = NULL;
     
-    palacios_free(vm_data);
+    list_for_each_entry_safe(pfile, tmp, &(state->open_files), file_node) { 
+        filp_close(pfile->filp, NULL);
+        list_del(&(pfile->file_node));
+        palacios_free(pfile->path);    
+        palacios_free(pfile);
+    }
 
+    palacios_free(state);
     return 0;
 }