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Subject[PATCH 06/52] CRED: Prepare RAMFS for cred passing
Date
Prepare RAMFS for cred passing.

Signed-off-by: David Howells <dhowells@redhat.com>
---

fs/ramfs/inode.c | 16 ++++++++++------
include/linux/ramfs.h | 3 ++-
mm/tiny-shmem.c | 3 ++-
3 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index fe3642a..29100e2 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -49,14 +49,15 @@ static struct backing_dev_info ramfs_backing_dev_info = {
BDI_CAP_READ_MAP | BDI_CAP_WRITE_MAP | BDI_CAP_EXEC_MAP,
};

-struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev)
+struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev,
+ struct cred *cred)
{
struct inode * inode = new_inode(sb);

if (inode) {
inode->i_mode = mode;
- inode->i_uid = current->cred->uid;
- inode->i_gid = current->cred->gid;
+ inode->i_uid = cred->uid;
+ inode->i_gid = cred->gid;
inode->i_blocks = 0;
inode->i_mapping->a_ops = &ramfs_aops;
inode->i_mapping->backing_dev_info = &ramfs_backing_dev_info;
@@ -92,7 +93,8 @@ struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev)
static int
ramfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
{
- struct inode * inode = ramfs_get_inode(dir->i_sb, mode, dev);
+ struct cred *cred = current->cred;
+ struct inode * inode = ramfs_get_inode(dir->i_sb, mode, dev, cred);
int error = -ENOSPC;

if (inode) {
@@ -124,10 +126,11 @@ static int ramfs_create(struct inode *dir, struct dentry *dentry, int mode, stru

static int ramfs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
{
+ struct cred *cred = current->cred;
struct inode *inode;
int error = -ENOSPC;

- inode = ramfs_get_inode(dir->i_sb, S_IFLNK|S_IRWXUGO, 0);
+ inode = ramfs_get_inode(dir->i_sb, S_IFLNK|S_IRWXUGO, 0, cred);
if (inode) {
int l = strlen(symname)+1;
error = page_symlink(inode, symname, l);
@@ -162,6 +165,7 @@ static const struct super_operations ramfs_ops = {

static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
{
+ struct cred *cred = current->cred;
struct inode * inode;
struct dentry * root;

@@ -171,7 +175,7 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
sb->s_magic = RAMFS_MAGIC;
sb->s_op = &ramfs_ops;
sb->s_time_gran = 1;
- inode = ramfs_get_inode(sb, S_IFDIR | 0755, 0);
+ inode = ramfs_get_inode(sb, S_IFDIR | 0755, 0, cred);
if (!inode)
return -ENOMEM;

diff --git a/include/linux/ramfs.h b/include/linux/ramfs.h
index b160fb1..124b0c3 100644
--- a/include/linux/ramfs.h
+++ b/include/linux/ramfs.h
@@ -1,7 +1,8 @@
#ifndef _LINUX_RAMFS_H
#define _LINUX_RAMFS_H

-struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev);
+struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev,
+ struct cred *cred);
extern int ramfs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt);

diff --git a/mm/tiny-shmem.c b/mm/tiny-shmem.c
index 8803471..3d4d602 100644
--- a/mm/tiny-shmem.c
+++ b/mm/tiny-shmem.c
@@ -48,6 +48,7 @@ module_init(init_tmpfs)
*/
struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags)
{
+ struct cred *cred = current->cred;
int error;
struct file *file;
struct inode *inode;
@@ -72,7 +73,7 @@ struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags)
goto put_dentry;

error = -ENOSPC;
- inode = ramfs_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0);
+ inode = ramfs_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0, cred);
if (!inode)
goto close_file;

-
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