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Diffstat (limited to 'fs/xfs/linux-2.6/xfs_ioctl.c')
-rw-r--r--fs/xfs/linux-2.6/xfs_ioctl.c1336
1 files changed, 1336 insertions, 0 deletions
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
new file mode 100644
index 000000000000..69809eef8a54
--- /dev/null
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -0,0 +1,1336 @@
+/*
+ * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file. Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA 94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include "xfs.h"
+
+#include "xfs_fs.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_dir.h"
+#include "xfs_dir2.h"
+#include "xfs_alloc.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_alloc_btree.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_btree.h"
+#include "xfs_ialloc.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode.h"
+#include "xfs_bmap.h"
+#include "xfs_bit.h"
+#include "xfs_rtalloc.h"
+#include "xfs_error.h"
+#include "xfs_itable.h"
+#include "xfs_rw.h"
+#include "xfs_acl.h"
+#include "xfs_cap.h"
+#include "xfs_mac.h"
+#include "xfs_attr.h"
+#include "xfs_buf_item.h"
+#include "xfs_utils.h"
+#include "xfs_dfrag.h"
+#include "xfs_fsops.h"
+
+#include <linux/dcache.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
+#include <linux/pagemap.h>
+
+/*
+ * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
+ * a file or fs handle.
+ *
+ * XFS_IOC_PATH_TO_FSHANDLE
+ * returns fs handle for a mount point or path within that mount point
+ * XFS_IOC_FD_TO_HANDLE
+ * returns full handle for a FD opened in user space
+ * XFS_IOC_PATH_TO_HANDLE
+ * returns full handle for a path
+ */
+STATIC int
+xfs_find_handle(
+ unsigned int cmd,
+ void __user *arg)
+{
+ int hsize;
+ xfs_handle_t handle;
+ xfs_fsop_handlereq_t hreq;
+ struct inode *inode;
+ struct vnode *vp;
+
+ if (copy_from_user(&hreq, arg, sizeof(hreq)))
+ return -XFS_ERROR(EFAULT);
+
+ memset((char *)&handle, 0, sizeof(handle));
+
+ switch (cmd) {
+ case XFS_IOC_PATH_TO_FSHANDLE:
+ case XFS_IOC_PATH_TO_HANDLE: {
+ struct nameidata nd;
+ int error;
+
+ error = user_path_walk_link((const char __user *)hreq.path, &nd);
+ if (error)
+ return error;
+
+ ASSERT(nd.dentry);
+ ASSERT(nd.dentry->d_inode);
+ inode = igrab(nd.dentry->d_inode);
+ path_release(&nd);
+ break;
+ }
+
+ case XFS_IOC_FD_TO_HANDLE: {
+ struct file *file;
+
+ file = fget(hreq.fd);
+ if (!file)
+ return -EBADF;
+
+ ASSERT(file->f_dentry);
+ ASSERT(file->f_dentry->d_inode);
+ inode = igrab(file->f_dentry->d_inode);
+ fput(file);
+ break;
+ }
+
+ default:
+ ASSERT(0);
+ return -XFS_ERROR(EINVAL);
+ }
+
+ if (inode->i_sb->s_magic != XFS_SB_MAGIC) {
+ /* we're not in XFS anymore, Toto */
+ iput(inode);
+ return -XFS_ERROR(EINVAL);
+ }
+
+ /* we need the vnode */
+ vp = LINVFS_GET_VP(inode);
+ if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
+ iput(inode);
+ return -XFS_ERROR(EBADF);
+ }
+
+ /* now we can grab the fsid */
+ memcpy(&handle.ha_fsid, vp->v_vfsp->vfs_altfsid, sizeof(xfs_fsid_t));
+ hsize = sizeof(xfs_fsid_t);
+
+ if (cmd != XFS_IOC_PATH_TO_FSHANDLE) {
+ xfs_inode_t *ip;
+ bhv_desc_t *bhv;
+ int lock_mode;
+
+ /* need to get access to the xfs_inode to read the generation */
+ bhv = vn_bhv_lookup_unlocked(VN_BHV_HEAD(vp), &xfs_vnodeops);
+ ASSERT(bhv);
+ ip = XFS_BHVTOI(bhv);
+ ASSERT(ip);
+ lock_mode = xfs_ilock_map_shared(ip);
+
+ /* fill in fid section of handle from inode */
+ handle.ha_fid.xfs_fid_len = sizeof(xfs_fid_t) -
+ sizeof(handle.ha_fid.xfs_fid_len);
+ handle.ha_fid.xfs_fid_pad = 0;
+ handle.ha_fid.xfs_fid_gen = ip->i_d.di_gen;
+ handle.ha_fid.xfs_fid_ino = ip->i_ino;
+
+ xfs_iunlock_map_shared(ip, lock_mode);
+
+ hsize = XFS_HSIZE(handle);
+ }
+
+ /* now copy our handle into the user buffer & write out the size */
+ if (copy_to_user(hreq.ohandle, &handle, hsize) ||
+ copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) {
+ iput(inode);
+ return -XFS_ERROR(EFAULT);
+ }
+
+ iput(inode);
+ return 0;
+}
+
+
+/*
+ * Convert userspace handle data into vnode (and inode).
+ * We [ab]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 cast to and from this type.
+ * This allows us to optimise the copy_from_user calls and gives
+ * a handy, shared routine.
+ *
+ * If no error, caller must always VN_RELE the returned vp.
+ */
+STATIC int
+xfs_vget_fsop_handlereq(
+ xfs_mount_t *mp,
+ struct inode *parinode, /* parent inode pointer */
+ xfs_fsop_handlereq_t *hreq,
+ vnode_t **vp,
+ struct inode **inode)
+{
+ void __user *hanp;
+ size_t hlen;
+ xfs_fid_t *xfid;
+ xfs_handle_t *handlep;
+ xfs_handle_t handle;
+ xfs_inode_t *ip;
+ struct inode *inodep;
+ vnode_t *vpp;
+ 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 = 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.xfs_fid_len !=
+ (hlen - sizeof(handlep->ha_fsid)
+ - sizeof(handlep->ha_fid.xfs_fid_len))
+ || handlep->ha_fid.xfs_fid_pad)
+ return XFS_ERROR(EINVAL);
+ }
+
+ /*
+ * Crack the handle, obtain the inode # & generation #
+ */
+ xfid = (struct xfs_fid *)&handlep->ha_fid;
+ if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) {
+ ino = xfid->xfs_fid_ino;
+ igen = xfid->xfs_fid_gen;
+ } else {
+ return XFS_ERROR(EINVAL);
+ }
+
+ /*
+ * Get the XFS inode, building a vnode 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_mode == 0 || ip->i_d.di_gen != igen) {
+ xfs_iput_new(ip, XFS_ILOCK_SHARED);
+ return XFS_ERROR(ENOENT);
+ }
+
+ vpp = XFS_ITOV(ip);
+ inodep = LINVFS_GET_IP(vpp);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+ *vp = vpp;
+ *inode = inodep;
+ return 0;
+}
+
+STATIC int
+xfs_open_by_handle(
+ xfs_mount_t *mp,
+ void __user *arg,
+ struct file *parfilp,
+ struct inode *parinode)
+{
+ int error;
+ int new_fd;
+ int permflag;
+ struct file *filp;
+ struct inode *inode;
+ struct dentry *dentry;
+ vnode_t *vp;
+ xfs_fsop_handlereq_t hreq;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -XFS_ERROR(EPERM);
+ if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode);
+ if (error)
+ return -error;
+
+ /* Restrict xfs_open_by_handle to directories & regular files. */
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
+ iput(inode);
+ return -XFS_ERROR(EINVAL);
+ }
+
+#if BITS_PER_LONG != 32
+ hreq.oflags |= O_LARGEFILE;
+#endif
+ /* Put open permission in namei format. */
+ permflag = hreq.oflags;
+ if ((permflag+1) & O_ACCMODE)
+ permflag++;
+ if (permflag & O_TRUNC)
+ permflag |= 2;
+
+ if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
+ (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
+ iput(inode);
+ return -XFS_ERROR(EPERM);
+ }
+
+ if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
+ iput(inode);
+ return -XFS_ERROR(EACCES);
+ }
+
+ /* Can't write directories. */
+ if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
+ iput(inode);
+ return -XFS_ERROR(EISDIR);
+ }
+
+ if ((new_fd = get_unused_fd()) < 0) {
+ iput(inode);
+ return new_fd;
+ }
+
+ dentry = d_alloc_anon(inode);
+ if (dentry == NULL) {
+ iput(inode);
+ put_unused_fd(new_fd);
+ return -XFS_ERROR(ENOMEM);
+ }
+
+ /* Ensure umount returns EBUSY on umounts while this file is open. */
+ mntget(parfilp->f_vfsmnt);
+
+ /* Create file pointer. */
+ filp = dentry_open(dentry, parfilp->f_vfsmnt, hreq.oflags);
+ if (IS_ERR(filp)) {
+ put_unused_fd(new_fd);
+ return -XFS_ERROR(-PTR_ERR(filp));
+ }
+ if (inode->i_mode & S_IFREG)
+ filp->f_op = &linvfs_invis_file_operations;
+
+ fd_install(new_fd, filp);
+ return new_fd;
+}
+
+STATIC int
+xfs_readlink_by_handle(
+ xfs_mount_t *mp,
+ void __user *arg,
+ struct file *parfilp,
+ struct inode *parinode)
+{
+ int error;
+ struct iovec aiov;
+ struct uio auio;
+ struct inode *inode;
+ xfs_fsop_handlereq_t hreq;
+ vnode_t *vp;
+ __u32 olen;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -XFS_ERROR(EPERM);
+ if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode);
+ if (error)
+ return -error;
+
+ /* Restrict this handle operation to symlinks only. */
+ if (vp->v_type != VLNK) {
+ VN_RELE(vp);
+ return -XFS_ERROR(EINVAL);
+ }
+
+ if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) {
+ VN_RELE(vp);
+ return -XFS_ERROR(EFAULT);
+ }
+ aiov.iov_len = olen;
+ aiov.iov_base = hreq.ohandle;
+
+ auio.uio_iov = &aiov;
+ auio.uio_iovcnt = 1;
+ auio.uio_offset = 0;
+ auio.uio_segflg = UIO_USERSPACE;
+ auio.uio_resid = olen;
+
+ VOP_READLINK(vp, &auio, IO_INVIS, NULL, error);
+
+ VN_RELE(vp);
+ return (olen - auio.uio_resid);
+}
+
+STATIC int
+xfs_fssetdm_by_handle(
+ xfs_mount_t *mp,
+ void __user *arg,
+ struct file *parfilp,
+ struct inode *parinode)
+{
+ int error;
+ struct fsdmidata fsd;
+ xfs_fsop_setdm_handlereq_t dmhreq;
+ struct inode *inode;
+ bhv_desc_t *bdp;
+ vnode_t *vp;
+
+ if (!capable(CAP_MKNOD))
+ return -XFS_ERROR(EPERM);
+ if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &vp, &inode);
+ if (error)
+ return -error;
+
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
+ VN_RELE(vp);
+ return -XFS_ERROR(EPERM);
+ }
+
+ if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
+ VN_RELE(vp);
+ return -XFS_ERROR(EFAULT);
+ }
+
+ bdp = bhv_base_unlocked(VN_BHV_HEAD(vp));
+ error = xfs_set_dmattrs(bdp, fsd.fsd_dmevmask, fsd.fsd_dmstate, NULL);
+
+ VN_RELE(vp);
+ if (error)
+ return -error;
+ return 0;
+}
+
+STATIC int
+xfs_attrlist_by_handle(
+ xfs_mount_t *mp,
+ void __user *arg,
+ struct file *parfilp,
+ struct inode *parinode)
+{
+ int error;
+ attrlist_cursor_kern_t *cursor;
+ xfs_fsop_attrlist_handlereq_t al_hreq;
+ struct inode *inode;
+ vnode_t *vp;
+ char *kbuf;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -XFS_ERROR(EPERM);
+ if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
+ return -XFS_ERROR(EFAULT);
+ if (al_hreq.buflen > XATTR_LIST_MAX)
+ return -XFS_ERROR(EINVAL);
+
+ error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq,
+ &vp, &inode);
+ if (error)
+ goto out;
+
+ kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
+ if (!kbuf)
+ goto out_vn_rele;
+
+ cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
+ VOP_ATTR_LIST(vp, kbuf, al_hreq.buflen, al_hreq.flags,
+ cursor, NULL, error);
+ if (error)
+ goto out_kfree;
+
+ if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
+ error = -EFAULT;
+
+ out_kfree:
+ kfree(kbuf);
+ out_vn_rele:
+ VN_RELE(vp);
+ out:
+ return -error;
+}
+
+STATIC int
+xfs_attrmulti_attr_get(
+ struct vnode *vp,
+ char *name,
+ char __user *ubuf,
+ __uint32_t *len,
+ __uint32_t flags)
+{
+ char *kbuf;
+ int error = EFAULT;
+
+ if (*len > XATTR_SIZE_MAX)
+ return EINVAL;
+ kbuf = kmalloc(*len, GFP_KERNEL);
+ if (!kbuf)
+ return ENOMEM;
+
+ VOP_ATTR_GET(vp, name, kbuf, len, flags, NULL, error);
+ if (error)
+ goto out_kfree;
+
+ if (copy_to_user(ubuf, kbuf, *len))
+ error = EFAULT;
+
+ out_kfree:
+ kfree(kbuf);
+ return error;
+}
+
+STATIC int
+xfs_attrmulti_attr_set(
+ struct vnode *vp,
+ char *name,
+ const char __user *ubuf,
+ __uint32_t len,
+ __uint32_t flags)
+{
+ char *kbuf;
+ int error = EFAULT;
+
+ if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode))
+ return EPERM;
+ if (len > XATTR_SIZE_MAX)
+ return EINVAL;
+
+ kbuf = kmalloc(len, GFP_KERNEL);
+ if (!kbuf)
+ return ENOMEM;
+
+ if (copy_from_user(kbuf, ubuf, len))
+ goto out_kfree;
+
+ VOP_ATTR_SET(vp, name, kbuf, len, flags, NULL, error);
+
+ out_kfree:
+ kfree(kbuf);
+ return error;
+}
+
+STATIC int
+xfs_attrmulti_attr_remove(
+ struct vnode *vp,
+ char *name,
+ __uint32_t flags)
+{
+ int error;
+
+ if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode))
+ return EPERM;
+
+ VOP_ATTR_REMOVE(vp, name, flags, NULL, error);
+ return error;
+}
+
+STATIC int
+xfs_attrmulti_by_handle(
+ xfs_mount_t *mp,
+ void __user *arg,
+ struct file *parfilp,
+ struct inode *parinode)
+{
+ int error;
+ xfs_attr_multiop_t *ops;
+ xfs_fsop_attrmulti_handlereq_t am_hreq;
+ struct inode *inode;
+ vnode_t *vp;
+ unsigned int i, size;
+ char *attr_name;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -XFS_ERROR(EPERM);
+ if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &vp, &inode);
+ if (error)
+ goto out;
+
+ error = E2BIG;
+ size = am_hreq.opcount * sizeof(attr_multiop_t);
+ if (!size || size > 16 * PAGE_SIZE)
+ goto out_vn_rele;
+
+ error = ENOMEM;
+ ops = kmalloc(size, GFP_KERNEL);
+ if (!ops)
+ goto out_vn_rele;
+
+ error = EFAULT;
+ if (copy_from_user(ops, am_hreq.ops, size))
+ goto out_kfree_ops;
+
+ attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
+ if (!attr_name)
+ goto out_kfree_ops;
+
+
+ error = 0;
+ for (i = 0; i < am_hreq.opcount; i++) {
+ ops[i].am_error = strncpy_from_user(attr_name,
+ ops[i].am_attrname, MAXNAMELEN);
+ if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
+ error = -ERANGE;
+ if (ops[i].am_error < 0)
+ break;
+
+ switch (ops[i].am_opcode) {
+ case ATTR_OP_GET:
+ ops[i].am_error = xfs_attrmulti_attr_get(vp,
+ attr_name, 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(vp,
+ attr_name, ops[i].am_attrvalue,
+ ops[i].am_length, ops[i].am_flags);
+ break;
+ case ATTR_OP_REMOVE:
+ ops[i].am_error = xfs_attrmulti_attr_remove(vp,
+ attr_name, ops[i].am_flags);
+ break;
+ default:
+ ops[i].am_error = EINVAL;
+ }
+ }
+
+ if (copy_to_user(am_hreq.ops, ops, size))
+ error = XFS_ERROR(EFAULT);
+
+ kfree(attr_name);
+ out_kfree_ops:
+ kfree(ops);
+ out_vn_rele:
+ VN_RELE(vp);
+ out:
+ return -error;
+}
+
+/* prototypes for a few of the stack-hungry cases that have
+ * their own functions. Functions are defined after their use
+ * so gcc doesn't get fancy and inline them with -03 */
+
+STATIC int
+xfs_ioc_space(
+ bhv_desc_t *bdp,
+ vnode_t *vp,
+ struct file *filp,
+ int flags,
+ unsigned int cmd,
+ void __user *arg);
+
+STATIC int
+xfs_ioc_bulkstat(
+ xfs_mount_t *mp,
+ unsigned int cmd,
+ void __user *arg);
+
+STATIC int
+xfs_ioc_fsgeometry_v1(
+ xfs_mount_t *mp,
+ void __user *arg);
+
+STATIC int
+xfs_ioc_fsgeometry(
+ xfs_mount_t *mp,
+ void __user *arg);
+
+STATIC int
+xfs_ioc_xattr(
+ vnode_t *vp,
+ xfs_inode_t *ip,
+ struct file *filp,
+ unsigned int cmd,
+ void __user *arg);
+
+STATIC int
+xfs_ioc_getbmap(
+ bhv_desc_t *bdp,
+ struct file *filp,
+ int flags,
+ unsigned int cmd,
+ void __user *arg);
+
+STATIC int
+xfs_ioc_getbmapx(
+ bhv_desc_t *bdp,
+ void __user *arg);
+
+int
+xfs_ioctl(
+ bhv_desc_t *bdp,
+ struct inode *inode,
+ struct file *filp,
+ int ioflags,
+ unsigned int cmd,
+ void __user *arg)
+{
+ int error;
+ vnode_t *vp;
+ xfs_inode_t *ip;
+ xfs_mount_t *mp;
+
+ vp = LINVFS_GET_VP(inode);
+
+ vn_trace_entry(vp, "xfs_ioctl", (inst_t *)__return_address);
+
+ ip = XFS_BHVTOI(bdp);
+ mp = ip->i_mount;
+
+ switch (cmd) {
+
+ case XFS_IOC_ALLOCSP:
+ case XFS_IOC_FREESP:
+ case XFS_IOC_RESVSP:
+ case XFS_IOC_UNRESVSP:
+ case XFS_IOC_ALLOCSP64:
+ case XFS_IOC_FREESP64:
+ case XFS_IOC_RESVSP64:
+ case XFS_IOC_UNRESVSP64:
+ /*
+ * Only allow the sys admin to reserve space unless
+ * unwritten extents are enabled.
+ */
+ if (!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) &&
+ !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ return xfs_ioc_space(bdp, vp, filp, ioflags, cmd, arg);
+
+ case XFS_IOC_DIOINFO: {
+ struct dioattr da;
+ xfs_buftarg_t *target =
+ (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
+ mp->m_rtdev_targp : mp->m_ddev_targp;
+
+ da.d_mem = da.d_miniosz = 1 << target->pbr_sshift;
+ /* The size dio will do in one go */
+ da.d_maxiosz = 64 * PAGE_CACHE_SIZE;
+
+ if (copy_to_user(arg, &da, sizeof(da)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+ }
+
+ case XFS_IOC_FSBULKSTAT_SINGLE:
+ case XFS_IOC_FSBULKSTAT:
+ case XFS_IOC_FSINUMBERS:
+ return xfs_ioc_bulkstat(mp, cmd, arg);
+
+ case XFS_IOC_FSGEOMETRY_V1:
+ return xfs_ioc_fsgeometry_v1(mp, arg);
+
+ case XFS_IOC_FSGEOMETRY:
+ return xfs_ioc_fsgeometry(mp, arg);
+
+ case XFS_IOC_GETVERSION:
+ case XFS_IOC_GETXFLAGS:
+ case XFS_IOC_SETXFLAGS:
+ case XFS_IOC_FSGETXATTR:
+ case XFS_IOC_FSSETXATTR:
+ case XFS_IOC_FSGETXATTRA:
+ return xfs_ioc_xattr(vp, ip, filp, cmd, arg);
+
+ case XFS_IOC_FSSETDM: {
+ struct fsdmidata dmi;
+
+ if (copy_from_user(&dmi, arg, sizeof(dmi)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_set_dmattrs(bdp, dmi.fsd_dmevmask, dmi.fsd_dmstate,
+ NULL);
+ return -error;
+ }
+
+ case XFS_IOC_GETBMAP:
+ case XFS_IOC_GETBMAPA:
+ return xfs_ioc_getbmap(bdp, filp, ioflags, cmd, arg);
+
+ case XFS_IOC_GETBMAPX:
+ return xfs_ioc_getbmapx(bdp, arg);
+
+ case XFS_IOC_FD_TO_HANDLE:
+ case XFS_IOC_PATH_TO_HANDLE:
+ case XFS_IOC_PATH_TO_FSHANDLE:
+ return xfs_find_handle(cmd, arg);
+
+ case XFS_IOC_OPEN_BY_HANDLE:
+ return xfs_open_by_handle(mp, arg, filp, inode);
+
+ case XFS_IOC_FSSETDM_BY_HANDLE:
+ return xfs_fssetdm_by_handle(mp, arg, filp, inode);
+
+ case XFS_IOC_READLINK_BY_HANDLE:
+ return xfs_readlink_by_handle(mp, arg, filp, inode);
+
+ case XFS_IOC_ATTRLIST_BY_HANDLE:
+ return xfs_attrlist_by_handle(mp, arg, filp, inode);
+
+ case XFS_IOC_ATTRMULTI_BY_HANDLE:
+ return xfs_attrmulti_by_handle(mp, arg, filp, inode);
+
+ case XFS_IOC_SWAPEXT: {
+ error = xfs_swapext((struct xfs_swapext __user *)arg);
+ return -error;
+ }
+
+ case XFS_IOC_FSCOUNTS: {
+ xfs_fsop_counts_t out;
+
+ error = xfs_fs_counts(mp, &out);
+ if (error)
+ return -error;
+
+ if (copy_to_user(arg, &out, sizeof(out)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+ }
+
+ case XFS_IOC_SET_RESBLKS: {
+ xfs_fsop_resblks_t inout;
+ __uint64_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&inout, arg, sizeof(inout)))
+ return -XFS_ERROR(EFAULT);
+
+ /* input parameter is passed in resblks field of structure */
+ in = inout.resblks;
+ error = xfs_reserve_blocks(mp, &in, &inout);
+ if (error)
+ return -error;
+
+ if (copy_to_user(arg, &inout, sizeof(inout)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+ }
+
+ case XFS_IOC_GET_RESBLKS: {
+ xfs_fsop_resblks_t out;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ error = xfs_reserve_blocks(mp, NULL, &out);
+ if (error)
+ return -error;
+
+ if (copy_to_user(arg, &out, sizeof(out)))
+ return -XFS_ERROR(EFAULT);
+
+ return 0;
+ }
+
+ case XFS_IOC_FSGROWFSDATA: {
+ xfs_growfs_data_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&in, arg, sizeof(in)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_growfs_data(mp, &in);
+ return -error;
+ }
+
+ case XFS_IOC_FSGROWFSLOG: {
+ xfs_growfs_log_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&in, arg, sizeof(in)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_growfs_log(mp, &in);
+ return -error;
+ }
+
+ case XFS_IOC_FSGROWFSRT: {
+ xfs_growfs_rt_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&in, arg, sizeof(in)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_growfs_rt(mp, &in);
+ return -error;
+ }
+
+ case XFS_IOC_FREEZE:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (inode->i_sb->s_frozen == SB_UNFROZEN)
+ freeze_bdev(inode->i_sb->s_bdev);
+ return 0;
+
+ case XFS_IOC_THAW:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (inode->i_sb->s_frozen != SB_UNFROZEN)
+ thaw_bdev(inode->i_sb->s_bdev, inode->i_sb);
+ return 0;
+
+ case XFS_IOC_GOINGDOWN: {
+ __uint32_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (get_user(in, (__uint32_t __user *)arg))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_fs_goingdown(mp, in);
+ return -error;
+ }
+
+ case XFS_IOC_ERROR_INJECTION: {
+ xfs_error_injection_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&in, arg, sizeof(in)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_errortag_add(in.errtag, mp);
+ return -error;
+ }
+
+ case XFS_IOC_ERROR_CLEARALL:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ error = xfs_errortag_clearall(mp);
+ return -error;
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+STATIC int
+xfs_ioc_space(
+ bhv_desc_t *bdp,
+ vnode_t *vp,
+ struct file *filp,
+ int ioflags,
+ unsigned int cmd,
+ void __user *arg)
+{
+ xfs_flock64_t bf;
+ int attr_flags = 0;
+ int error;
+
+ if (vp->v_inode.i_flags & (S_IMMUTABLE|S_APPEND))
+ return -XFS_ERROR(EPERM);
+
+ if (!(filp->f_flags & FMODE_WRITE))
+ return -XFS_ERROR(EBADF);
+
+ if (vp->v_type != VREG)
+ return -XFS_ERROR(EINVAL);
+
+ if (copy_from_user(&bf, arg, sizeof(bf)))
+ return -XFS_ERROR(EFAULT);
+
+ if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
+ attr_flags |= ATTR_NONBLOCK;
+ if (ioflags & IO_INVIS)
+ attr_flags |= ATTR_DMI;
+
+ error = xfs_change_file_space(bdp, cmd, &bf, filp->f_pos,
+ NULL, attr_flags);
+ return -error;
+}
+
+STATIC int
+xfs_ioc_bulkstat(
+ xfs_mount_t *mp,
+ unsigned int cmd,
+ void __user *arg)
+{
+ xfs_fsop_bulkreq_t bulkreq;
+ int count; /* # of records returned */
+ xfs_ino_t inlast; /* last inode number */
+ int done;
+ int error;
+
+ /* done = 1 if there are more stats to get and if bulkstat */
+ /* should be called again (unused here, but used in dmapi) */
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return -XFS_ERROR(EIO);
+
+ if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
+ return -XFS_ERROR(EFAULT);
+
+ if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
+ return -XFS_ERROR(EFAULT);
+
+ if ((count = bulkreq.icount) <= 0)
+ return -XFS_ERROR(EINVAL);
+
+ if (cmd == XFS_IOC_FSINUMBERS)
+ error = xfs_inumbers(mp, &inlast, &count,
+ bulkreq.ubuffer);
+ else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
+ error = xfs_bulkstat_single(mp, &inlast,
+ bulkreq.ubuffer, &done);
+ else { /* XFS_IOC_FSBULKSTAT */
+ if (count == 1 && inlast != 0) {
+ inlast++;
+ error = xfs_bulkstat_single(mp, &inlast,
+ bulkreq.ubuffer, &done);
+ } else {
+ error = xfs_bulkstat(mp, &inlast, &count,
+ (bulkstat_one_pf)xfs_bulkstat_one, NULL,
+ sizeof(xfs_bstat_t), bulkreq.ubuffer,
+ BULKSTAT_FG_QUICK, &done);
+ }
+ }
+
+ if (error)
+ return -error;
+
+ if (bulkreq.ocount != NULL) {
+ if (copy_to_user(bulkreq.lastip, &inlast,
+ sizeof(xfs_ino_t)))
+ return -XFS_ERROR(EFAULT);
+
+ if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
+ return -XFS_ERROR(EFAULT);
+ }
+
+ return 0;
+}
+
+STATIC int
+xfs_ioc_fsgeometry_v1(
+ xfs_mount_t *mp,
+ void __user *arg)
+{
+ xfs_fsop_geom_v1_t fsgeo;
+ int error;
+
+ error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
+ if (error)
+ return -error;
+
+ if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+}
+
+STATIC int
+xfs_ioc_fsgeometry(
+ xfs_mount_t *mp,
+ void __user *arg)
+{
+ xfs_fsop_geom_t fsgeo;
+ int error;
+
+ error = xfs_fs_geometry(mp, &fsgeo, 4);
+ if (error)
+ return -error;
+
+ if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+}
+
+/*
+ * Linux extended inode flags interface.
+ */
+#define LINUX_XFLAG_SYNC 0x00000008 /* Synchronous updates */
+#define LINUX_XFLAG_IMMUTABLE 0x00000010 /* Immutable file */
+#define LINUX_XFLAG_APPEND 0x00000020 /* writes to file may only append */
+#define LINUX_XFLAG_NODUMP 0x00000040 /* do not dump file */
+#define LINUX_XFLAG_NOATIME 0x00000080 /* do not update atime */
+
+STATIC unsigned int
+xfs_merge_ioc_xflags(
+ unsigned int flags,
+ unsigned int start)
+{
+ unsigned int xflags = start;
+
+ if (flags & LINUX_XFLAG_IMMUTABLE)
+ xflags |= XFS_XFLAG_IMMUTABLE;
+ else
+ xflags &= ~XFS_XFLAG_IMMUTABLE;
+ if (flags & LINUX_XFLAG_APPEND)
+ xflags |= XFS_XFLAG_APPEND;
+ else
+ xflags &= ~XFS_XFLAG_APPEND;
+ if (flags & LINUX_XFLAG_SYNC)
+ xflags |= XFS_XFLAG_SYNC;
+ else
+ xflags &= ~XFS_XFLAG_SYNC;
+ if (flags & LINUX_XFLAG_NOATIME)
+ xflags |= XFS_XFLAG_NOATIME;
+ else
+ xflags &= ~XFS_XFLAG_NOATIME;
+ if (flags & LINUX_XFLAG_NODUMP)
+ xflags |= XFS_XFLAG_NODUMP;
+ else
+ xflags &= ~XFS_XFLAG_NODUMP;
+
+ return xflags;
+}
+
+STATIC unsigned int
+xfs_di2lxflags(
+ __uint16_t di_flags)
+{
+ unsigned int flags = 0;
+
+ if (di_flags & XFS_DIFLAG_IMMUTABLE)
+ flags |= LINUX_XFLAG_IMMUTABLE;
+ if (di_flags & XFS_DIFLAG_APPEND)
+ flags |= LINUX_XFLAG_APPEND;
+ if (di_flags & XFS_DIFLAG_SYNC)
+ flags |= LINUX_XFLAG_SYNC;
+ if (di_flags & XFS_DIFLAG_NOATIME)
+ flags |= LINUX_XFLAG_NOATIME;
+ if (di_flags & XFS_DIFLAG_NODUMP)
+ flags |= LINUX_XFLAG_NODUMP;
+ return flags;
+}
+
+STATIC int
+xfs_ioc_xattr(
+ vnode_t *vp,
+ xfs_inode_t *ip,
+ struct file *filp,
+ unsigned int cmd,
+ void __user *arg)
+{
+ struct fsxattr fa;
+ vattr_t va;
+ int error;
+ int attr_flags;
+ unsigned int flags;
+
+ switch (cmd) {
+ case XFS_IOC_FSGETXATTR: {
+ va.va_mask = XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS;
+ VOP_GETATTR(vp, &va, 0, NULL, error);
+ if (error)
+ return -error;
+
+ fa.fsx_xflags = va.va_xflags;
+ fa.fsx_extsize = va.va_extsize;
+ fa.fsx_nextents = va.va_nextents;
+
+ if (copy_to_user(arg, &fa, sizeof(fa)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+ }
+
+ case XFS_IOC_FSSETXATTR: {
+ if (copy_from_user(&fa, arg, sizeof(fa)))
+ return -XFS_ERROR(EFAULT);
+
+ attr_flags = 0;
+ if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
+ attr_flags |= ATTR_NONBLOCK;
+
+ va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE;
+ va.va_xflags = fa.fsx_xflags;
+ va.va_extsize = fa.fsx_extsize;
+
+ VOP_SETATTR(vp, &va, attr_flags, NULL, error);
+ if (!error)
+ vn_revalidate(vp); /* update Linux inode flags */
+ return -error;
+ }
+
+ case XFS_IOC_FSGETXATTRA: {
+ va.va_mask = XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_ANEXTENTS;
+ VOP_GETATTR(vp, &va, 0, NULL, error);
+ if (error)
+ return -error;
+
+ fa.fsx_xflags = va.va_xflags;
+ fa.fsx_extsize = va.va_extsize;
+ fa.fsx_nextents = va.va_anextents;
+
+ if (copy_to_user(arg, &fa, sizeof(fa)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+ }
+
+ case XFS_IOC_GETXFLAGS: {
+ flags = xfs_di2lxflags(ip->i_d.di_flags);
+ if (copy_to_user(arg, &flags, sizeof(flags)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+ }
+
+ case XFS_IOC_SETXFLAGS: {
+ if (copy_from_user(&flags, arg, sizeof(flags)))
+ return -XFS_ERROR(EFAULT);
+
+ if (flags & ~(LINUX_XFLAG_IMMUTABLE | LINUX_XFLAG_APPEND | \
+ LINUX_XFLAG_NOATIME | LINUX_XFLAG_NODUMP | \
+ LINUX_XFLAG_SYNC))
+ return -XFS_ERROR(EOPNOTSUPP);
+
+ attr_flags = 0;
+ if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
+ attr_flags |= ATTR_NONBLOCK;
+
+ va.va_mask = XFS_AT_XFLAGS;
+ va.va_xflags = xfs_merge_ioc_xflags(flags,
+ xfs_ip2xflags(ip));
+
+ VOP_SETATTR(vp, &va, attr_flags, NULL, error);
+ if (!error)
+ vn_revalidate(vp); /* update Linux inode flags */
+ return -error;
+ }
+
+ case XFS_IOC_GETVERSION: {
+ flags = LINVFS_GET_IP(vp)->i_generation;
+ if (copy_to_user(arg, &flags, sizeof(flags)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+ }
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+STATIC int
+xfs_ioc_getbmap(
+ bhv_desc_t *bdp,
+ struct file *filp,
+ int ioflags,
+ unsigned int cmd,
+ void __user *arg)
+{
+ struct getbmap bm;
+ int iflags;
+ int error;
+
+ if (copy_from_user(&bm, arg, sizeof(bm)))
+ return -XFS_ERROR(EFAULT);
+
+ if (bm.bmv_count < 2)
+ return -XFS_ERROR(EINVAL);
+
+ iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
+ if (ioflags & IO_INVIS)
+ iflags |= BMV_IF_NO_DMAPI_READ;
+
+ error = xfs_getbmap(bdp, &bm, (struct getbmap __user *)arg+1, iflags);
+ if (error)
+ return -error;
+
+ if (copy_to_user(arg, &bm, sizeof(bm)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+}
+
+STATIC int
+xfs_ioc_getbmapx(
+ bhv_desc_t *bdp,
+ void __user *arg)
+{
+ struct getbmapx bmx;
+ struct getbmap bm;
+ int iflags;
+ int error;
+
+ if (copy_from_user(&bmx, arg, sizeof(bmx)))
+ return -XFS_ERROR(EFAULT);
+
+ if (bmx.bmv_count < 2)
+ return -XFS_ERROR(EINVAL);
+
+ /*
+ * Map input getbmapx structure to a getbmap
+ * structure for xfs_getbmap.
+ */
+ GETBMAP_CONVERT(bmx, bm);
+
+ iflags = bmx.bmv_iflags;
+
+ if (iflags & (~BMV_IF_VALID))
+ return -XFS_ERROR(EINVAL);
+
+ iflags |= BMV_IF_EXTENDED;
+
+ error = xfs_getbmap(bdp, &bm, (struct getbmapx __user *)arg+1, iflags);
+ if (error)
+ return -error;
+
+ GETBMAP_CONVERT(bm, bmx);
+
+ if (copy_to_user(arg, &bmx, sizeof(bmx)))
+ return -XFS_ERROR(EFAULT);
+
+ return 0;
+}