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Merge tag 'vfs-fix-ioctl-checking-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

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Pull common SETFLAGS/FSSETXATTR parameter checking from Darrick Wong:
 "Here's a patch series that sets up common parameter checking functions
  for the FS_IOC_SETFLAGS and FS_IOC_FSSETXATTR ioctl implementations.

  The goal here is to reduce the amount of behaviorial variance between
  the filesystems where those ioctls originated (ext2 and XFS,
  respectively) and everybody else.

   - Standardize parameter checking for the SETFLAGS and FSSETXATTR
     ioctls (which were the file attribute setters for ext4 and xfs and
     have now been hoisted to the vfs)

   - Only allow the DAX flag to be set on files and directories"

* tag 'vfs-fix-ioctl-checking-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  vfs: only allow FSSETXATTR to set DAX flag on files and dirs
  vfs: teach vfs_ioc_fssetxattr_check to check extent size hints
  vfs: teach vfs_ioc_fssetxattr_check to check project id info
  vfs: create a generic checking function for FS_IOC_FSSETXATTR
  vfs: create a generic checking and prep function for FS_IOC_SETFLAGS
This commit is contained in:
Linus Torvalds
2019-07-12 16:54:37 -07:00
parent 8487d82299 dbc77f31e5
commit 5010fe9f09
15 changed files with 303 additions and 245 deletions
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37
fs/orangefs/file.c
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@@ -357,11 +357,28 @@ static ssize_t orangefs_file_write_iter(struct kiocb *iocb,
return ret;
}
static int orangefs_getflags(struct inode *inode, unsigned long *uval)
{
__u64 val = 0;
int ret;
ret = orangefs_inode_getxattr(inode,
"user.pvfs2.meta_hint",
&val, sizeof(val));
if (ret < 0 && ret != -ENODATA)
return ret;
else if (ret == -ENODATA)
val = 0;
*uval = val;
return 0;
}
/*
* Perform a miscellaneous operation on a file.
*/
static long orangefs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(file);
int ret = -ENOTTY;
__u64 val = 0;
unsigned long uval;
@@ -375,20 +392,16 @@ static long orangefs_ioctl(struct file *file, unsigned int cmd, unsigned long ar
* and append flags
*/
if (cmd == FS_IOC_GETFLAGS) {
val = 0;
ret = orangefs_inode_getxattr(file_inode(file),
"user.pvfs2.meta_hint",
&val, sizeof(val));
if (ret < 0 && ret != -ENODATA)
ret = orangefs_getflags(inode, &uval);
if (ret)
return ret;
else if (ret == -ENODATA)
val = 0;
uval = val;
gossip_debug(GOSSIP_FILE_DEBUG,
"orangefs_ioctl: FS_IOC_GETFLAGS: %llu\n",
(unsigned long long)uval);
return put_user(uval, (int __user *)arg);
} else if (cmd == FS_IOC_SETFLAGS) {
unsigned long old_uval;
ret = 0;
if (get_user(uval, (int __user *)arg))
return -EFAULT;
@@ -404,11 +417,17 @@ static long orangefs_ioctl(struct file *file, unsigned int cmd, unsigned long ar
gossip_err("orangefs_ioctl: the FS_IOC_SETFLAGS only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n");
return -EINVAL;
}
ret = orangefs_getflags(inode, &old_uval);
if (ret)
return ret;
ret = vfs_ioc_setflags_prepare(inode, old_uval, uval);
if (ret)
return ret;
val = uval;
gossip_debug(GOSSIP_FILE_DEBUG,
"orangefs_ioctl: FS_IOC_SETFLAGS: %llu\n",
(unsigned long long)val);
ret = orangefs_inode_setxattr(file_inode(file),
ret = orangefs_inode_setxattr(inode,
"user.pvfs2.meta_hint",
&val, sizeof(val), 0);
}