*/
#include <linux/compat.h>
#include <linux/ioctl.h>
+#include <linux/mount.h>
#include <asm/uaccess.h>
#include "xfs.h"
#include "xfs_fs.h"
return 0;
}
-/*
- * Convert userspace handle data into inode.
- *
- * We use the fact that all the fsop_handlereq ioctl calls have a data
- * structure argument whose first component is always a xfs_fsop_handlereq_t,
- * so we can pass that sub structure into this handy, shared routine.
- *
- * If no error, caller must always iput the returned inode.
- */
-STATIC int
-xfs_vget_fsop_handlereq_compat(
- xfs_mount_t *mp,
- struct inode *parinode, /* parent inode pointer */
- compat_xfs_fsop_handlereq_t *hreq,
- struct inode **inode)
+STATIC struct dentry *
+xfs_compat_handlereq_to_dentry(
+ struct file *parfilp,
+ compat_xfs_fsop_handlereq_t *hreq)
{
- void __user *hanp;
- size_t hlen;
- xfs_fid_t *xfid;
- xfs_handle_t *handlep;
- xfs_handle_t handle;
- xfs_inode_t *ip;
- xfs_ino_t ino;
- __u32 igen;
- int error;
-
- /*
- * Only allow handle opens under a directory.
- */
- if (!S_ISDIR(parinode->i_mode))
- return XFS_ERROR(ENOTDIR);
-
- hanp = compat_ptr(hreq->ihandle);
- hlen = hreq->ihandlen;
- handlep = &handle;
-
- if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep))
- return XFS_ERROR(EINVAL);
- if (copy_from_user(handlep, hanp, hlen))
- return XFS_ERROR(EFAULT);
- if (hlen < sizeof(*handlep))
- memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen);
- if (hlen > sizeof(handlep->ha_fsid)) {
- if (handlep->ha_fid.fid_len !=
- (hlen - sizeof(handlep->ha_fsid) -
- sizeof(handlep->ha_fid.fid_len)) ||
- handlep->ha_fid.fid_pad)
- return XFS_ERROR(EINVAL);
- }
-
- /*
- * Crack the handle, obtain the inode # & generation #
- */
- xfid = (struct xfs_fid *)&handlep->ha_fid;
- if (xfid->fid_len == sizeof(*xfid) - sizeof(xfid->fid_len)) {
- ino = xfid->fid_ino;
- igen = xfid->fid_gen;
- } else {
- return XFS_ERROR(EINVAL);
- }
-
- /*
- * Get the XFS inode, building a Linux inode to go with it.
- */
- error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
- if (error)
- return error;
- if (ip == NULL)
- return XFS_ERROR(EIO);
- if (ip->i_d.di_gen != igen) {
- xfs_iput_new(ip, XFS_ILOCK_SHARED);
- return XFS_ERROR(ENOENT);
- }
-
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
-
- *inode = VFS_I(ip);
- return 0;
+ return xfs_handle_to_dentry(parfilp,
+ compat_ptr(hreq->ihandle), hreq->ihandlen);
}
STATIC int
xfs_compat_attrlist_by_handle(
- xfs_mount_t *mp,
- void __user *arg,
- struct inode *parinode)
+ struct file *parfilp,
+ void __user *arg)
{
int error;
attrlist_cursor_kern_t *cursor;
compat_xfs_fsop_attrlist_handlereq_t al_hreq;
- struct inode *inode;
+ struct dentry *dentry;
char *kbuf;
if (!capable(CAP_SYS_ADMIN))
if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
return -XFS_ERROR(EINVAL);
- error = xfs_vget_fsop_handlereq_compat(mp, parinode, &al_hreq.hreq,
- &inode);
- if (error)
- goto out;
+ dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+ error = -ENOMEM;
kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
if (!kbuf)
- goto out_vn_rele;
+ goto out_dput;
cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
- error = xfs_attr_list(XFS_I(inode), kbuf, al_hreq.buflen,
+ error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
al_hreq.flags, cursor);
if (error)
goto out_kfree;
out_kfree:
kfree(kbuf);
- out_vn_rele:
- iput(inode);
- out:
- return -error;
+ out_dput:
+ dput(dentry);
+ return error;
}
STATIC int
xfs_compat_attrmulti_by_handle(
- xfs_mount_t *mp,
- void __user *arg,
- struct inode *parinode)
+ struct file *parfilp,
+ void __user *arg)
{
int error;
compat_xfs_attr_multiop_t *ops;
compat_xfs_fsop_attrmulti_handlereq_t am_hreq;
- struct inode *inode;
+ struct dentry *dentry;
unsigned int i, size;
char *attr_name;
sizeof(compat_xfs_fsop_attrmulti_handlereq_t)))
return -XFS_ERROR(EFAULT);
- error = xfs_vget_fsop_handlereq_compat(mp, parinode, &am_hreq.hreq,
- &inode);
- if (error)
- goto out;
+ dentry = xfs_compat_handlereq_to_dentry(parfilp, &am_hreq.hreq);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
error = E2BIG;
size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t);
if (!size || size > 16 * PAGE_SIZE)
- goto out_vn_rele;
+ goto out_dput;
error = ENOMEM;
ops = kmalloc(size, GFP_KERNEL);
if (!ops)
- goto out_vn_rele;
+ goto out_dput;
error = EFAULT;
if (copy_from_user(ops, compat_ptr(am_hreq.ops), size))
switch (ops[i].am_opcode) {
case ATTR_OP_GET:
- ops[i].am_error = xfs_attrmulti_attr_get(inode,
- attr_name,
+ ops[i].am_error = xfs_attrmulti_attr_get(
+ dentry->d_inode, attr_name,
compat_ptr(ops[i].am_attrvalue),
&ops[i].am_length, ops[i].am_flags);
break;
case ATTR_OP_SET:
- ops[i].am_error = xfs_attrmulti_attr_set(inode,
- attr_name,
+ ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
+ if (ops[i].am_error)
+ break;
+ ops[i].am_error = xfs_attrmulti_attr_set(
+ dentry->d_inode, attr_name,
compat_ptr(ops[i].am_attrvalue),
ops[i].am_length, ops[i].am_flags);
+ mnt_drop_write(parfilp->f_path.mnt);
break;
case ATTR_OP_REMOVE:
- ops[i].am_error = xfs_attrmulti_attr_remove(inode,
- attr_name, ops[i].am_flags);
+ ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
+ if (ops[i].am_error)
+ break;
+ ops[i].am_error = xfs_attrmulti_attr_remove(
+ dentry->d_inode, attr_name,
+ ops[i].am_flags);
+ mnt_drop_write(parfilp->f_path.mnt);
break;
default:
ops[i].am_error = EINVAL;
kfree(attr_name);
out_kfree_ops:
kfree(ops);
- out_vn_rele:
- iput(inode);
- out:
+ out_dput:
+ dput(dentry);
return -error;
}
STATIC int
xfs_compat_fssetdm_by_handle(
- xfs_mount_t *mp,
- void __user *arg,
- struct inode *parinode)
+ struct file *parfilp,
+ void __user *arg)
{
int error;
struct fsdmidata fsd;
compat_xfs_fsop_setdm_handlereq_t dmhreq;
- struct inode *inode;
+ struct dentry *dentry;
if (!capable(CAP_MKNOD))
return -XFS_ERROR(EPERM);
sizeof(compat_xfs_fsop_setdm_handlereq_t)))
return -XFS_ERROR(EFAULT);
- error = xfs_vget_fsop_handlereq_compat(mp, parinode, &dmhreq.hreq,
- &inode);
- if (error)
- return -error;
+ dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
- if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
+ if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
error = -XFS_ERROR(EPERM);
goto out;
}
goto out;
}
- error = -xfs_set_dmattrs(XFS_I(inode), fsd.fsd_dmevmask,
+ error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
fsd.fsd_dmstate);
out:
- iput(inode);
+ dput(dentry);
return error;
}
if (xfs_compat_handlereq_copyin(&hreq, arg))
return -XFS_ERROR(EFAULT);
- return xfs_open_by_handle(mp, &hreq, filp, inode);
+ return xfs_open_by_handle(filp, &hreq);
}
case XFS_IOC_READLINK_BY_HANDLE_32: {
struct xfs_fsop_handlereq hreq;
if (xfs_compat_handlereq_copyin(&hreq, arg))
return -XFS_ERROR(EFAULT);
- return xfs_readlink_by_handle(mp, &hreq, inode);
+ return xfs_readlink_by_handle(filp, &hreq);
}
case XFS_IOC_ATTRLIST_BY_HANDLE_32:
- return xfs_compat_attrlist_by_handle(mp, arg, inode);
+ return xfs_compat_attrlist_by_handle(filp, arg);
case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
- return xfs_compat_attrmulti_by_handle(mp, arg, inode);
+ return xfs_compat_attrmulti_by_handle(filp, arg);
case XFS_IOC_FSSETDM_BY_HANDLE_32:
- return xfs_compat_fssetdm_by_handle(mp, arg, inode);
+ return xfs_compat_fssetdm_by_handle(filp, arg);
default:
return -XFS_ERROR(ENOIOCTLCMD);
}
projects / linux-2.6-omap-h63xx.git / blobdiff