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nilfs2: convert to fileattr

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Use the fileattr API to let the VFS handle locking, permission checking and
conversion.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: Ryusuke Konishi <konishi.ryusuke@gmail.com>
This commit is contained in:
Miklos Szeredi 2021-04-07 14:36:44 +02:00
parent 2ca58e30b1
commit 7c7c436e14
4 changed files with 25 additions and 43 deletions
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2
fs/nilfs2/file.c
View file

@ -148,6 +148,8 @@ const struct inode_operations nilfs_file_inode_operations = {
.setattr = nilfs_setattr,
.permission = nilfs_permission,
.fiemap = nilfs_fiemap,
.fileattr_get = nilfs_fileattr_get,
.fileattr_set = nilfs_fileattr_set,
};
/* end of file */

61
fs/nilfs2/ioctl.c
View file

@ -16,6 +16,7 @@
#include <linux/compat.h> /* compat_ptr() */
#include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
#include <linux/buffer_head.h>
#include <linux/fileattr.h>
#include "nilfs.h"
#include "segment.h"
#include "bmap.h"
@ -113,51 +114,39 @@ static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
}
/**
* nilfs_ioctl_getflags - ioctl to support lsattr
* nilfs_fileattr_get - ioctl to support lsattr
*/
static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
int nilfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
{
unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
struct inode *inode = d_inode(dentry);
return put_user(flags, (int __user *)argp);
fileattr_fill_flags(fa, NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE);
return 0;
}
/**
* nilfs_ioctl_setflags - ioctl to support chattr
* nilfs_fileattr_set - ioctl to support chattr
*/
static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
void __user *argp)
int nilfs_fileattr_set(struct user_namespace *mnt_userns,
struct dentry *dentry, struct fileattr *fa)
{
struct inode *inode = d_inode(dentry);
struct nilfs_transaction_info ti;
unsigned int flags, oldflags;
int ret;
if (!inode_owner_or_capable(&init_user_ns, inode))
return -EACCES;
if (fileattr_has_fsx(fa))
return -EOPNOTSUPP;
if (get_user(flags, (int __user *)argp))
return -EFAULT;
ret = mnt_want_write_file(filp);
if (ret)
return ret;
flags = nilfs_mask_flags(inode->i_mode, flags);
inode_lock(inode);
oldflags = NILFS_I(inode)->i_flags;
ret = vfs_ioc_setflags_prepare(inode, oldflags, flags);
if (ret)
goto out;
flags = nilfs_mask_flags(inode->i_mode, fa->flags);
ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
if (ret)
goto out;
return ret;
NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
(flags & FS_FL_USER_MODIFIABLE);
oldflags = NILFS_I(inode)->i_flags & ~FS_FL_USER_MODIFIABLE;
NILFS_I(inode)->i_flags = oldflags | (flags & FS_FL_USER_MODIFIABLE);
nilfs_set_inode_flags(inode);
inode->i_ctime = current_time(inode);
@ -165,11 +154,7 @@ static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
nilfs_set_transaction_flag(NILFS_TI_SYNC);
nilfs_mark_inode_dirty(inode);
ret = nilfs_transaction_commit(inode->i_sb);
out:
inode_unlock(inode);
mnt_drop_write_file(filp);
return ret;
return nilfs_transaction_commit(inode->i_sb);
}
/**
@ -1282,10 +1267,6 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
void __user *argp = (void __user *)arg;
switch (cmd) {
case FS_IOC_GETFLAGS:
return nilfs_ioctl_getflags(inode, argp);
case FS_IOC_SETFLAGS:
return nilfs_ioctl_setflags(inode, filp, argp);
case FS_IOC_GETVERSION:
return nilfs_ioctl_getversion(inode, argp);
case NILFS_IOCTL_CHANGE_CPMODE:
@ -1331,12 +1312,6 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case FS_IOC32_GETFLAGS:
cmd = FS_IOC_GETFLAGS;
break;
case FS_IOC32_SETFLAGS:
cmd = FS_IOC_SETFLAGS;
break;
case FS_IOC32_GETVERSION:
cmd = FS_IOC_GETVERSION;
break;

2
fs/nilfs2/namei.c
View file

@ -552,6 +552,8 @@ const struct inode_operations nilfs_dir_inode_operations = {
.setattr = nilfs_setattr,
.permission = nilfs_permission,
.fiemap = nilfs_fiemap,
.fileattr_get = nilfs_fileattr_get,
.fileattr_set = nilfs_fileattr_set,
};
const struct inode_operations nilfs_special_inode_operations = {

3
fs/nilfs2/nilfs.h
View file

@ -243,6 +243,9 @@ extern void nilfs_set_link(struct inode *, struct nilfs_dir_entry *,
extern int nilfs_sync_file(struct file *, loff_t, loff_t, int);
/* ioctl.c */
int nilfs_fileattr_get(struct dentry *dentry, struct fileattr *m);
int nilfs_fileattr_set(struct user_namespace *mnt_userns,
struct dentry *dentry, struct fileattr *fa);
long nilfs_ioctl(struct file *, unsigned int, unsigned long);
long nilfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *, struct nilfs_argv *,