forked from Minki/linux
7b47ef52d0
Abstract away implementation details from file systems by providing a block_device based helper to retrieve the discard granularity. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> [drbd] Acked-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Acked-by: David Sterba <dsterba@suse.com> [btrfs] Link: https://lore.kernel.org/r/20220415045258.199825-26-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
146 lines
3.0 KiB
C
146 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* linux/fs/jfs/ioctl.c
|
|
*
|
|
* Copyright (C) 2006 Herbert Poetzl
|
|
* adapted from Remy Card's ext2/ioctl.c
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/capability.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/time.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/blkdev.h>
|
|
#include <asm/current.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/fileattr.h>
|
|
|
|
#include "jfs_filsys.h"
|
|
#include "jfs_debug.h"
|
|
#include "jfs_incore.h"
|
|
#include "jfs_dinode.h"
|
|
#include "jfs_inode.h"
|
|
#include "jfs_dmap.h"
|
|
#include "jfs_discard.h"
|
|
|
|
static struct {
|
|
long jfs_flag;
|
|
long ext2_flag;
|
|
} jfs_map[] = {
|
|
{JFS_NOATIME_FL, FS_NOATIME_FL},
|
|
{JFS_DIRSYNC_FL, FS_DIRSYNC_FL},
|
|
{JFS_SYNC_FL, FS_SYNC_FL},
|
|
{JFS_SECRM_FL, FS_SECRM_FL},
|
|
{JFS_UNRM_FL, FS_UNRM_FL},
|
|
{JFS_APPEND_FL, FS_APPEND_FL},
|
|
{JFS_IMMUTABLE_FL, FS_IMMUTABLE_FL},
|
|
{0, 0},
|
|
};
|
|
|
|
static long jfs_map_ext2(unsigned long flags, int from)
|
|
{
|
|
int index=0;
|
|
long mapped=0;
|
|
|
|
while (jfs_map[index].jfs_flag) {
|
|
if (from) {
|
|
if (jfs_map[index].ext2_flag & flags)
|
|
mapped |= jfs_map[index].jfs_flag;
|
|
} else {
|
|
if (jfs_map[index].jfs_flag & flags)
|
|
mapped |= jfs_map[index].ext2_flag;
|
|
}
|
|
index++;
|
|
}
|
|
return mapped;
|
|
}
|
|
|
|
int jfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
|
|
{
|
|
struct jfs_inode_info *jfs_inode = JFS_IP(d_inode(dentry));
|
|
unsigned int flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE;
|
|
|
|
if (d_is_special(dentry))
|
|
return -ENOTTY;
|
|
|
|
fileattr_fill_flags(fa, jfs_map_ext2(flags, 0));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int jfs_fileattr_set(struct user_namespace *mnt_userns,
|
|
struct dentry *dentry, struct fileattr *fa)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
struct jfs_inode_info *jfs_inode = JFS_IP(inode);
|
|
unsigned int flags;
|
|
|
|
if (d_is_special(dentry))
|
|
return -ENOTTY;
|
|
|
|
if (fileattr_has_fsx(fa))
|
|
return -EOPNOTSUPP;
|
|
|
|
flags = jfs_map_ext2(fa->flags, 1);
|
|
if (!S_ISDIR(inode->i_mode))
|
|
flags &= ~JFS_DIRSYNC_FL;
|
|
|
|
/* Is it quota file? Do not allow user to mess with it */
|
|
if (IS_NOQUOTA(inode))
|
|
return -EPERM;
|
|
|
|
flags = flags & JFS_FL_USER_MODIFIABLE;
|
|
flags |= jfs_inode->mode2 & ~JFS_FL_USER_MODIFIABLE;
|
|
jfs_inode->mode2 = flags;
|
|
|
|
jfs_set_inode_flags(inode);
|
|
inode->i_ctime = current_time(inode);
|
|
mark_inode_dirty(inode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
|
|
switch (cmd) {
|
|
case FITRIM:
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct fstrim_range range;
|
|
s64 ret = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (!bdev_max_discard_sectors(sb->s_bdev)) {
|
|
jfs_warn("FITRIM not supported on device");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (copy_from_user(&range, (struct fstrim_range __user *)arg,
|
|
sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
range.minlen = max_t(unsigned int, range.minlen,
|
|
bdev_discard_granularity(sb->s_bdev));
|
|
|
|
ret = jfs_ioc_trim(inode, &range);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (copy_to_user((struct fstrim_range __user *)arg, &range,
|
|
sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|