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ovl: remove unneeded ioctls

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The FS_IOC_[GS]ETFLAGS/FS_IOC_FS[GS]ETXATTR ioctls are now handled via the
fileattr api.  The only unconverted filesystem remaining is CIFS and it is
not allowed to be overlayed due to case insensitive filenames.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2021-04-08 11:11:19 +02:00
parent 72227eac17
commit c4fe8aef2f
3 changed files with 0 additions and 116 deletions
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110
fs/overlayfs/file.c
View File

@ -491,112 +491,6 @@ static int ovl_fadvise(struct file *file, loff_t offset, loff_t len, int advice)
return ret;
}
static long ovl_real_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct fd real;
long ret;
ret = ovl_real_fdget(file, &real);
if (ret)
return ret;
ret = security_file_ioctl(real.file, cmd, arg);
if (!ret) {
/*
* Don't override creds, since we currently can't safely check
* permissions before doing so.
*/
ret = vfs_ioctl(real.file, cmd, arg);
}
fdput(real);
return ret;
}
static long ovl_ioctl_set_flags(struct file *file, unsigned int cmd,
unsigned long arg)
{
long ret;
struct inode *inode = file_inode(file);
if (!inode_owner_or_capable(&init_user_ns, inode))
return -EACCES;
ret = mnt_want_write_file(file);
if (ret)
return ret;
inode_lock(inode);
/*
* Prevent copy up if immutable and has no CAP_LINUX_IMMUTABLE
* capability.
*/
ret = -EPERM;
if (!ovl_has_upperdata(inode) && IS_IMMUTABLE(inode) &&
!capable(CAP_LINUX_IMMUTABLE))
goto unlock;
ret = ovl_maybe_copy_up(file_dentry(file), O_WRONLY);
if (ret)
goto unlock;
ret = ovl_real_ioctl(file, cmd, arg);
ovl_copyflags(ovl_inode_real(inode), inode);
unlock:
inode_unlock(inode);
mnt_drop_write_file(file);
return ret;
}
long ovl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
long ret;
switch (cmd) {
case FS_IOC_GETFLAGS:
case FS_IOC_FSGETXATTR:
ret = ovl_real_ioctl(file, cmd, arg);
break;
case FS_IOC_FSSETXATTR:
case FS_IOC_SETFLAGS:
ret = ovl_ioctl_set_flags(file, cmd, arg);
break;
default:
ret = -ENOTTY;
}
return ret;
}
#ifdef CONFIG_COMPAT
long ovl_compat_ioctl(struct file *file, 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;
default:
return -ENOIOCTLCMD;
}
return ovl_ioctl(file, cmd, arg);
}
#endif
enum ovl_copyop {
OVL_COPY,
OVL_CLONE,
@ -696,10 +590,6 @@ const struct file_operations ovl_file_operations = {
.mmap = ovl_mmap,
.fallocate = ovl_fallocate,
.fadvise = ovl_fadvise,
.unlocked_ioctl = ovl_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ovl_compat_ioctl,
#endif
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,

2
fs/overlayfs/overlayfs.h
View File

@ -519,8 +519,6 @@ struct dentry *ovl_create_temp(struct dentry *workdir, struct ovl_cattr *attr);
extern const struct file_operations ovl_file_operations;
int __init ovl_aio_request_cache_init(void);
void ovl_aio_request_cache_destroy(void);
long ovl_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
long ovl_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
int ovl_fileattr_get(struct dentry *dentry, struct fileattr *fa);
int ovl_fileattr_set(struct user_namespace *mnt_userns,
struct dentry *dentry, struct fileattr *fa);

4
fs/overlayfs/readdir.c
View File

@ -963,10 +963,6 @@ const struct file_operations ovl_dir_operations = {
.llseek = ovl_dir_llseek,
.fsync = ovl_dir_fsync,
.release = ovl_dir_release,
.unlocked_ioctl = ovl_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ovl_compat_ioctl,
#endif
};
int ovl_check_empty_dir(struct dentry *dentry, struct list_head *list)