Release 4.10 fs/jfs/ioctl.c
/*
* 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 "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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert poetzl | herbert poetzl | 89 | 100.00% | 1 | 100.00% |
| Total | 89 | 100.00% | 1 | 100.00% |
long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
struct jfs_inode_info *jfs_inode = JFS_IP(inode);
unsigned int flags;
switch (cmd) {
case JFS_IOC_GETFLAGS:
jfs_get_inode_flags(jfs_inode);
flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE;
flags = jfs_map_ext2(flags, 0);
return put_user(flags, (int __user *) arg);
case JFS_IOC_SETFLAGS: {
unsigned int oldflags;
int err;
err = mnt_want_write_file(filp);
if (err)
return err;
if (!inode_owner_or_capable(inode)) {
err = -EACCES;
goto setflags_out;
}
if (get_user(flags, (int __user *) arg)) {
err = -EFAULT;
goto setflags_out;
}
flags = jfs_map_ext2(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)) {
err = -EPERM;
goto setflags_out;
}
/* Lock against other parallel changes of flags */
inode_lock(inode);
jfs_get_inode_flags(jfs_inode);
oldflags = jfs_inode->mode2;
/*
* The IMMUTABLE and APPEND_ONLY flags can only be changed by
* the relevant capability.
*/
if ((oldflags & JFS_IMMUTABLE_FL) ||
((flags ^ oldflags) &
(JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
if (!capable(CAP_LINUX_IMMUTABLE)) {
inode_unlock(inode);
err = -EPERM;
goto setflags_out;
}
}
flags = flags & JFS_FL_USER_MODIFIABLE;
flags |= oldflags & ~JFS_FL_USER_MODIFIABLE;
jfs_inode->mode2 = flags;
jfs_set_inode_flags(inode);
inode_unlock(inode);
inode->i_ctime = current_time(inode);
mark_inode_dirty(inode);
setflags_out:
mnt_drop_write_file(filp);
return err;
}
case FITRIM:
{
struct super_block *sb = inode->i_sb;
struct request_queue *q = bdev_get_queue(sb->s_bdev);
struct fstrim_range range;
s64 ret = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (!blk_queue_discard(q)) {
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,
q->limits.discard_granularity);
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;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert poetzl | herbert poetzl | 214 | 45.53% | 1 | 7.69% |
| tino reichardt | tino reichardt | 151 | 32.13% | 1 | 7.69% |
| dave hansen | dave hansen | 48 | 10.21% | 1 | 7.69% |
| andi kleen | andi kleen | 23 | 4.89% | 1 | 7.69% |
| dave kleikamp | dave kleikamp | 10 | 2.13% | 1 | 7.69% |
| jan kara | jan kara | 10 | 2.13% | 1 | 7.69% |
| al viro | al viro | 8 | 1.70% | 4 | 30.77% |
| deepa dinamani | deepa dinamani | 4 | 0.85% | 1 | 7.69% |
| serge hallyn | serge hallyn | 1 | 0.21% | 1 | 7.69% |
| satyam sharma | satyam sharma | 1 | 0.21% | 1 | 7.69% |
| Total | 470 | 100.00% | 13 | 100.00% |
#ifdef CONFIG_COMPAT
long jfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
/* While these ioctl numbers defined with 'long' and have different
* numbers than the 64bit ABI,
* the actual implementation only deals with ints and is compatible.
*/
switch (cmd) {
case JFS_IOC_GETFLAGS32:
cmd = JFS_IOC_GETFLAGS;
break;
case JFS_IOC_SETFLAGS32:
cmd = JFS_IOC_SETFLAGS;
break;
}
return jfs_ioctl(filp, cmd, arg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andi kleen | andi kleen | 51 | 100.00% | 1 | 100.00% |
| Total | 51 | 100.00% | 1 | 100.00% |
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert poetzl | herbert poetzl | 386 | 53.09% | 1 | 5.88% |
| tino reichardt | tino reichardt | 166 | 22.83% | 1 | 5.88% |
| andi kleen | andi kleen | 79 | 10.87% | 2 | 11.76% |
| dave hansen | dave hansen | 51 | 7.02% | 1 | 5.88% |
| al viro | al viro | 11 | 1.51% | 5 | 29.41% |
| dave kleikamp | dave kleikamp | 10 | 1.38% | 1 | 5.88% |
| jan kara | jan kara | 10 | 1.38% | 1 | 5.88% |
| david howells | david howells | 7 | 0.96% | 1 | 5.88% |
| deepa dinamani | deepa dinamani | 4 | 0.55% | 1 | 5.88% |
| linus torvalds | linus torvalds | 1 | 0.14% | 1 | 5.88% |
| serge hallyn | serge hallyn | 1 | 0.14% | 1 | 5.88% |
| satyam sharma | satyam sharma | 1 | 0.14% | 1 | 5.88% |
| Total | 727 | 100.00% | 17 | 100.00% |
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