[PATCH] xfs: remove XFS_IOC_FSSETDM and XFS_IOC_FSSETDM_BY_HANDLE

Christoph Hellwig
2019-11-08T05:23:10Z

Thes ioctls set DMAPI specific flags in the on-disk inode, but there is
no way to actually ever query those flags. The only known user is
xfsrestore with the -D option, which is documented to be only useful
inside a DMAPI enviroment, which isn't supported by upstream XFS.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/xfs_ioctl.c | 94 --------------------------------------------
fs/xfs/xfs_ioctl.h | 6 ---
fs/xfs/xfs_ioctl32.c | 40 -------------------
fs/xfs/xfs_ioctl32.h | 9 -----
4 files changed, 149 deletions(-)

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 287f83eb791f..a979d730203a 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -291,82 +291,6 @@ xfs_readlink_by_handle(
return error;
}

-int
-xfs_set_dmattrs(
- xfs_inode_t *ip,
- uint evmask,
- uint16_t state)
-{
- xfs_mount_t *mp = ip->i_mount;
- xfs_trans_t *tp;
- int error;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- if (XFS_FORCED_SHUTDOWN(mp))
- return -EIO;
-
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
- if (error)
- return error;
-
- xfs_ilock(ip, XFS_ILOCK_EXCL);
- xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
-
- ip->i_d.di_dmevmask = evmask;
- ip->i_d.di_dmstate = state;
-
- xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
- error = xfs_trans_commit(tp);
-
- return error;
-}
-
-STATIC int
-xfs_fssetdm_by_handle(
- struct file *parfilp,
- void __user *arg)
-{
- int error;
- struct fsdmidata fsd;
- xfs_fsop_setdm_handlereq_t dmhreq;
- struct dentry *dentry;
-
- if (!capable(CAP_MKNOD))
- return -EPERM;
- if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
- return -EFAULT;
-
- error = mnt_want_write_file(parfilp);
- if (error)
- return error;
-
- dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
- if (IS_ERR(dentry)) {
- mnt_drop_write_file(parfilp);
- return PTR_ERR(dentry);
- }
-
- if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
- error = -EPERM;
- goto out;
- }
-
- if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
- error = -EFAULT;
- goto out;
- }
-
- error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
- fsd.fsd_dmstate);
-
- out:
- mnt_drop_write_file(parfilp);
- dput(dentry);
- return error;
-}
-
STATIC int
xfs_attrlist_by_handle(
struct file *parfilp,
@@ -2126,22 +2050,6 @@ xfs_file_ioctl(
case XFS_IOC_SETXFLAGS:
return xfs_ioc_setxflags(ip, filp, arg);

- case XFS_IOC_FSSETDM: {
- struct fsdmidata dmi;
-
- if (copy_from_user(&dmi, arg, sizeof(dmi)))
- return -EFAULT;
-
- error = mnt_want_write_file(filp);
- if (error)
- return error;
-
- error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
- dmi.fsd_dmstate);
- mnt_drop_write_file(filp);
- return error;
- }
-
case XFS_IOC_GETBMAP:
case XFS_IOC_GETBMAPA:
case XFS_IOC_GETBMAPX:
@@ -2169,8 +2077,6 @@ xfs_file_ioctl(
return -EFAULT;
return xfs_open_by_handle(filp, &hreq);
}
- case XFS_IOC_FSSETDM_BY_HANDLE:
- return xfs_fssetdm_by_handle(filp, arg);

case XFS_IOC_READLINK_BY_HANDLE: {
xfs_fsop_handlereq_t hreq;
diff --git a/fs/xfs/xfs_ioctl.h b/fs/xfs/xfs_ioctl.h
index 25ef178cbb74..420bd95dc326 100644
--- a/fs/xfs/xfs_ioctl.h
+++ b/fs/xfs/xfs_ioctl.h
@@ -70,12 +70,6 @@ xfs_file_compat_ioctl(
unsigned int cmd,
unsigned long arg);

-extern int
-xfs_set_dmattrs(
- struct xfs_inode *ip,
- uint evmask,
- uint16_t state);
-
struct xfs_ibulk;
struct xfs_bstat;
struct xfs_inogrp;
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index 3c0d518e1039..c4c4f09113d3 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -500,44 +500,6 @@ xfs_compat_attrmulti_by_handle(
return error;
}

-STATIC int
-xfs_compat_fssetdm_by_handle(
- struct file *parfilp,
- void __user *arg)
-{
- int error;
- struct fsdmidata fsd;
- compat_xfs_fsop_setdm_handlereq_t dmhreq;
- struct dentry *dentry;
-
- if (!capable(CAP_MKNOD))
- return -EPERM;
- if (copy_from_user(&dmhreq, arg,
- sizeof(compat_xfs_fsop_setdm_handlereq_t)))
- return -EFAULT;
-
- dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
- if (IS_ERR(dentry))
- return PTR_ERR(dentry);
-
- if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
- error = -EPERM;
- goto out;
- }
-
- if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
- error = -EFAULT;
- goto out;
- }
-
- error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
- fsd.fsd_dmstate);
-
-out:
- dput(dentry);
- return error;
-}
-
long
xfs_file_compat_ioctl(
struct file *filp,
@@ -646,8 +608,6 @@ xfs_file_compat_ioctl(
return xfs_compat_attrlist_by_handle(filp, arg);
case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
return xfs_compat_attrmulti_by_handle(filp, arg);
- case XFS_IOC_FSSETDM_BY_HANDLE_32:
- return xfs_compat_fssetdm_by_handle(filp, arg);
default:
/* try the native version */
return xfs_file_ioctl(filp, cmd, (unsigned long)arg);
diff --git a/fs/xfs/xfs_ioctl32.h b/fs/xfs/xfs_ioctl32.h
index 7985344d3aa6..7cbd6a0ee3e9 100644
--- a/fs/xfs/xfs_ioctl32.h
+++ b/fs/xfs/xfs_ioctl32.h
@@ -143,15 +143,6 @@ typedef struct compat_xfs_fsop_attrmulti_handlereq {
#define XFS_IOC_ATTRMULTI_BY_HANDLE_32 \
_IOW('X', 123, struct compat_xfs_fsop_attrmulti_handlereq)

-typedef struct compat_xfs_fsop_setdm_handlereq {
- struct compat_xfs_fsop_handlereq hreq; /* handle information */
- /* ptr to struct fsdmidata */
- compat_uptr_t data; /* DMAPI data */
-} compat_xfs_fsop_setdm_handlereq_t;
-
-#define XFS_IOC_FSSETDM_BY_HANDLE_32 \
- _IOW('X', 121, struct compat_xfs_fsop_setdm_handlereq)
-
#ifdef BROKEN_X86_ALIGNMENT
/* on ia32 l_start is on a 32-bit boundary */
typedef struct compat_xfs_flock64 {
--
2.20.1