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-rw-r--r--fs/xfs/xfs_ioctl.c1556
1 files changed, 1556 insertions, 0 deletions
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
new file mode 100644
index 0000000..f7ce7de
--- /dev/null
+++ b/fs/xfs/xfs_ioctl.c
@@ -0,0 +1,1556 @@
+/*
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms 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. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_bit.h"
+#include "xfs_log.h"
+#include "xfs_inum.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_alloc.h"
+#include "xfs_mount.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_dinode.h"
+#include "xfs_inode.h"
+#include "xfs_ioctl.h"
+#include "xfs_rtalloc.h"
+#include "xfs_itable.h"
+#include "xfs_error.h"
+#include "xfs_attr.h"
+#include "xfs_bmap.h"
+#include "xfs_buf_item.h"
+#include "xfs_utils.h"
+#include "xfs_dfrag.h"
+#include "xfs_fsops.h"
+#include "xfs_vnodeops.h"
+#include "xfs_discard.h"
+#include "xfs_quota.h"
+#include "xfs_inode_item.h"
+#include "xfs_export.h"
+#include "xfs_trace.h"
+
+#include <linux/capability.h>
+#include <linux/dcache.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
+#include <linux/pagemap.h>
+#include <linux/slab.h>
+#include <linux/exportfs.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
+ */
+int
+xfs_find_handle(
+ unsigned int cmd,
+ xfs_fsop_handlereq_t *hreq)
+{
+ int hsize;
+ xfs_handle_t handle;
+ struct inode *inode;
+ struct file *file = NULL;
+ struct path path;
+ int error;
+ struct xfs_inode *ip;
+
+ if (cmd == XFS_IOC_FD_TO_HANDLE) {
+ file = fget(hreq->fd);
+ if (!file)
+ return -EBADF;
+ inode = file->f_path.dentry->d_inode;
+ } else {
+ error = user_lpath((const char __user *)hreq->path, &path);
+ if (error)
+ return error;
+ inode = path.dentry->d_inode;
+ }
+ ip = XFS_I(inode);
+
+ /*
+ * We can only generate handles for inodes residing on a XFS filesystem,
+ * and only for regular files, directories or symbolic links.
+ */
+ error = -EINVAL;
+ if (inode->i_sb->s_magic != XFS_SB_MAGIC)
+ goto out_put;
+
+ error = -EBADF;
+ if (!S_ISREG(inode->i_mode) &&
+ !S_ISDIR(inode->i_mode) &&
+ !S_ISLNK(inode->i_mode))
+ goto out_put;
+
+
+ memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
+
+ if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
+ /*
+ * This handle only contains an fsid, zero the rest.
+ */
+ memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
+ hsize = sizeof(xfs_fsid_t);
+ } else {
+ int lock_mode;
+
+ lock_mode = xfs_ilock_map_shared(ip);
+ handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
+ sizeof(handle.ha_fid.fid_len);
+ handle.ha_fid.fid_pad = 0;
+ handle.ha_fid.fid_gen = ip->i_d.di_gen;
+ handle.ha_fid.fid_ino = ip->i_ino;
+ xfs_iunlock_map_shared(ip, lock_mode);
+
+ hsize = XFS_HSIZE(handle);
+ }
+
+ error = -EFAULT;
+ if (copy_to_user(hreq->ohandle, &handle, hsize) ||
+ copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
+ goto out_put;
+
+ error = 0;
+
+ out_put:
+ if (cmd == XFS_IOC_FD_TO_HANDLE)
+ fput(file);
+ else
+ path_put(&path);
+ return error;
+}
+
+/*
+ * No need to do permission checks on the various pathname components
+ * as the handle operations are privileged.
+ */
+STATIC int
+xfs_handle_acceptable(
+ void *context,
+ struct dentry *dentry)
+{
+ return 1;
+}
+
+/*
+ * Convert userspace handle data into a dentry.
+ */
+struct dentry *
+xfs_handle_to_dentry(
+ struct file *parfilp,
+ void __user *uhandle,
+ u32 hlen)
+{
+ xfs_handle_t handle;
+ struct xfs_fid64 fid;
+
+ /*
+ * Only allow handle opens under a directory.
+ */
+ if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
+ return ERR_PTR(-ENOTDIR);
+
+ if (hlen != sizeof(xfs_handle_t))
+ return ERR_PTR(-EINVAL);
+ if (copy_from_user(&handle, uhandle, hlen))
+ return ERR_PTR(-EFAULT);
+ if (handle.ha_fid.fid_len !=
+ sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
+ return ERR_PTR(-EINVAL);
+
+ memset(&fid, 0, sizeof(struct fid));
+ fid.ino = handle.ha_fid.fid_ino;
+ fid.gen = handle.ha_fid.fid_gen;
+
+ return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
+ FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
+ xfs_handle_acceptable, NULL);
+}
+
+STATIC struct dentry *
+xfs_handlereq_to_dentry(
+ struct file *parfilp,
+ xfs_fsop_handlereq_t *hreq)
+{
+ return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
+}
+
+int
+xfs_open_by_handle(
+ struct file *parfilp,
+ xfs_fsop_handlereq_t *hreq)
+{
+ const struct cred *cred = current_cred();
+ int error;
+ int fd;
+ int permflag;
+ struct file *filp;
+ struct inode *inode;
+ struct dentry *dentry;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -XFS_ERROR(EPERM);
+
+ dentry = xfs_handlereq_to_dentry(parfilp, hreq);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+ inode = dentry->d_inode;
+
+ /* Restrict xfs_open_by_handle to directories & regular files. */
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
+ error = -XFS_ERROR(EPERM);
+ goto out_dput;
+ }
+
+#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)) {
+ error = -XFS_ERROR(EPERM);
+ goto out_dput;
+ }
+
+ if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
+ error = -XFS_ERROR(EACCES);
+ goto out_dput;
+ }
+
+ /* Can't write directories. */
+ if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
+ error = -XFS_ERROR(EISDIR);
+ goto out_dput;
+ }
+
+ fd = get_unused_fd();
+ if (fd < 0) {
+ error = fd;
+ goto out_dput;
+ }
+
+ filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
+ hreq->oflags, cred);
+ if (IS_ERR(filp)) {
+ put_unused_fd(fd);
+ return PTR_ERR(filp);
+ }
+
+ if (S_ISREG(inode->i_mode)) {
+ filp->f_flags |= O_NOATIME;
+ filp->f_mode |= FMODE_NOCMTIME;
+ }
+
+ fd_install(fd, filp);
+ return fd;
+
+ out_dput:
+ dput(dentry);
+ return error;
+}
+
+/*
+ * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
+ * unused first argument.
+ */
+STATIC int
+do_readlink(
+ char __user *buffer,
+ int buflen,
+ const char *link)
+{
+ int len;
+
+ len = PTR_ERR(link);
+ if (IS_ERR(link))
+ goto out;
+
+ len = strlen(link);
+ if (len > (unsigned) buflen)
+ len = buflen;
+ if (copy_to_user(buffer, link, len))
+ len = -EFAULT;
+ out:
+ return len;
+}
+
+
+int
+xfs_readlink_by_handle(
+ struct file *parfilp,
+ xfs_fsop_handlereq_t *hreq)
+{
+ struct dentry *dentry;
+ __u32 olen;
+ void *link;
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -XFS_ERROR(EPERM);
+
+ dentry = xfs_handlereq_to_dentry(parfilp, hreq);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+
+ /* Restrict this handle operation to symlinks only. */
+ if (!S_ISLNK(dentry->d_inode->i_mode)) {
+ error = -XFS_ERROR(EINVAL);
+ goto out_dput;
+ }
+
+ if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
+ error = -XFS_ERROR(EFAULT);
+ goto out_dput;
+ }
+
+ link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
+ if (!link) {
+ error = -XFS_ERROR(ENOMEM);
+ goto out_dput;
+ }
+
+ error = -xfs_readlink(XFS_I(dentry->d_inode), link);
+ if (error)
+ goto out_kfree;
+ error = do_readlink(hreq->ohandle, olen, link);
+ if (error)
+ goto out_kfree;
+
+ out_kfree:
+ kfree(link);
+ out_dput:
+ dput(dentry);
+ 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 -XFS_ERROR(EPERM);
+ if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
+ return -XFS_ERROR(EFAULT);
+
+ dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+
+ if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
+ error = -XFS_ERROR(EPERM);
+ goto out;
+ }
+
+ if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
+ error = -XFS_ERROR(EFAULT);
+ goto out;
+ }
+
+ error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
+ fsd.fsd_dmstate);
+
+ out:
+ dput(dentry);
+ return error;
+}
+
+STATIC int
+xfs_attrlist_by_handle(
+ struct file *parfilp,
+ void __user *arg)
+{
+ int error = -ENOMEM;
+ attrlist_cursor_kern_t *cursor;
+ xfs_fsop_attrlist_handlereq_t al_hreq;
+ struct dentry *dentry;
+ 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);
+
+ /*
+ * Reject flags, only allow namespaces.
+ */
+ if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
+ return -XFS_ERROR(EINVAL);
+
+ dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+
+ kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
+ if (!kbuf)
+ goto out_dput;
+
+ cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
+ error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
+ al_hreq.flags, cursor);
+ if (error)
+ goto out_kfree;
+
+ if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
+ error = -EFAULT;
+
+ out_kfree:
+ kfree(kbuf);
+ out_dput:
+ dput(dentry);
+ return error;
+}
+
+int
+xfs_attrmulti_attr_get(
+ struct inode *inode,
+ unsigned char *name,
+ unsigned char __user *ubuf,
+ __uint32_t *len,
+ __uint32_t flags)
+{
+ unsigned char *kbuf;
+ int error = EFAULT;
+
+ if (*len > XATTR_SIZE_MAX)
+ return EINVAL;
+ kbuf = kmalloc(*len, GFP_KERNEL);
+ if (!kbuf)
+ return ENOMEM;
+
+ error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
+ if (error)
+ goto out_kfree;
+
+ if (copy_to_user(ubuf, kbuf, *len))
+ error = EFAULT;
+
+ out_kfree:
+ kfree(kbuf);
+ return error;
+}
+
+int
+xfs_attrmulti_attr_set(
+ struct inode *inode,
+ unsigned char *name,
+ const unsigned char __user *ubuf,
+ __uint32_t len,
+ __uint32_t flags)
+{
+ unsigned char *kbuf;
+ int error = EFAULT;
+
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ return EPERM;
+ if (len > XATTR_SIZE_MAX)
+ return EINVAL;
+
+ kbuf = memdup_user(ubuf, len);
+ if (IS_ERR(kbuf))
+ return PTR_ERR(kbuf);
+
+ error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
+
+ return error;
+}
+
+int
+xfs_attrmulti_attr_remove(
+ struct inode *inode,
+ unsigned char *name,
+ __uint32_t flags)
+{
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ return EPERM;
+ return xfs_attr_remove(XFS_I(inode), name, flags);
+}
+
+STATIC int
+xfs_attrmulti_by_handle(
+ struct file *parfilp,
+ void __user *arg)
+{
+ int error;
+ xfs_attr_multiop_t *ops;
+ xfs_fsop_attrmulti_handlereq_t am_hreq;
+ struct dentry *dentry;
+ unsigned int i, size;
+ unsigned 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);
+
+ /* overflow check */
+ if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
+ return -E2BIG;
+
+ dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+
+ error = E2BIG;
+ size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
+ if (!size || size > 16 * PAGE_SIZE)
+ goto out_dput;
+
+ ops = memdup_user(am_hreq.ops, size);
+ if (IS_ERR(ops)) {
+ error = PTR_ERR(ops);
+ goto out_dput;
+ }
+
+ 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((char *)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(
+ dentry->d_inode, attr_name,
+ ops[i].am_attrvalue, &ops[i].am_length,
+ ops[i].am_flags);
+ break;
+ case ATTR_OP_SET:
+ 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,
+ 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 = 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;
+ }
+ }
+
+ if (copy_to_user(am_hreq.ops, ops, size))
+ error = XFS_ERROR(EFAULT);
+
+ kfree(attr_name);
+ out_kfree_ops:
+ kfree(ops);
+ out_dput:
+ dput(dentry);
+ return -error;
+}
+
+int
+xfs_ioc_space(
+ struct xfs_inode *ip,
+ struct inode *inode,
+ struct file *filp,
+ int ioflags,
+ unsigned int cmd,
+ xfs_flock64_t *bf)
+{
+ int attr_flags = 0;
+ int error;
+
+ /*
+ * Only allow the sys admin to reserve space unless
+ * unwritten extents are enabled.
+ */
+ if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
+ !capable(CAP_SYS_ADMIN))
+ return -XFS_ERROR(EPERM);
+
+ if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
+ return -XFS_ERROR(EPERM);
+
+ if (!(filp->f_mode & FMODE_WRITE))
+ return -XFS_ERROR(EBADF);
+
+ if (!S_ISREG(inode->i_mode))
+ return -XFS_ERROR(EINVAL);
+
+ if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
+ attr_flags |= XFS_ATTR_NONBLOCK;
+
+ if (filp->f_flags & O_DSYNC)
+ attr_flags |= XFS_ATTR_SYNC;
+
+ if (ioflags & IO_INVIS)
+ attr_flags |= XFS_ATTR_DMI;
+
+ error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, 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 (bulkreq.ubuffer == NULL)
+ return -XFS_ERROR(EINVAL);
+
+ if (cmd == XFS_IOC_FSINUMBERS)
+ error = xfs_inumbers(mp, &inlast, &count,
+ bulkreq.ubuffer, xfs_inumbers_fmt);
+ else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
+ error = xfs_bulkstat_single(mp, &inlast,
+ bulkreq.ubuffer, &done);
+ else /* XFS_IOC_FSBULKSTAT */
+ error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
+ sizeof(xfs_bstat_t), bulkreq.ubuffer,
+ &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_t fsgeo;
+ int error;
+
+ error = xfs_fs_geometry(mp, &fsgeo, 3);
+ if (error)
+ return -error;
+
+ /*
+ * Caller should have passed an argument of type
+ * xfs_fsop_geom_v1_t. This is a proper subset of the
+ * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
+ */
+ if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
+ 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.
+ */
+
+STATIC unsigned int
+xfs_merge_ioc_xflags(
+ unsigned int flags,
+ unsigned int start)
+{
+ unsigned int xflags = start;
+
+ if (flags & FS_IMMUTABLE_FL)
+ xflags |= XFS_XFLAG_IMMUTABLE;
+ else
+ xflags &= ~XFS_XFLAG_IMMUTABLE;
+ if (flags & FS_APPEND_FL)
+ xflags |= XFS_XFLAG_APPEND;
+ else
+ xflags &= ~XFS_XFLAG_APPEND;
+ if (flags & FS_SYNC_FL)
+ xflags |= XFS_XFLAG_SYNC;
+ else
+ xflags &= ~XFS_XFLAG_SYNC;
+ if (flags & FS_NOATIME_FL)
+ xflags |= XFS_XFLAG_NOATIME;
+ else
+ xflags &= ~XFS_XFLAG_NOATIME;
+ if (flags & FS_NODUMP_FL)
+ 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 |= FS_IMMUTABLE_FL;
+ if (di_flags & XFS_DIFLAG_APPEND)
+ flags |= FS_APPEND_FL;
+ if (di_flags & XFS_DIFLAG_SYNC)
+ flags |= FS_SYNC_FL;
+ if (di_flags & XFS_DIFLAG_NOATIME)
+ flags |= FS_NOATIME_FL;
+ if (di_flags & XFS_DIFLAG_NODUMP)
+ flags |= FS_NODUMP_FL;
+ return flags;
+}
+
+STATIC int
+xfs_ioc_fsgetxattr(
+ xfs_inode_t *ip,
+ int attr,
+ void __user *arg)
+{
+ struct fsxattr fa;
+
+ memset(&fa, 0, sizeof(struct fsxattr));
+
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+ fa.fsx_xflags = xfs_ip2xflags(ip);
+ fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
+ fa.fsx_projid = xfs_get_projid(ip);
+
+ if (attr) {
+ if (ip->i_afp) {
+ if (ip->i_afp->if_flags & XFS_IFEXTENTS)
+ fa.fsx_nextents = ip->i_afp->if_bytes /
+ sizeof(xfs_bmbt_rec_t);
+ else
+ fa.fsx_nextents = ip->i_d.di_anextents;
+ } else
+ fa.fsx_nextents = 0;
+ } else {
+ if (ip->i_df.if_flags & XFS_IFEXTENTS)
+ fa.fsx_nextents = ip->i_df.if_bytes /
+ sizeof(xfs_bmbt_rec_t);
+ else
+ fa.fsx_nextents = ip->i_d.di_nextents;
+ }
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+ if (copy_to_user(arg, &fa, sizeof(fa)))
+ return -EFAULT;
+ return 0;
+}
+
+STATIC void
+xfs_set_diflags(
+ struct xfs_inode *ip,
+ unsigned int xflags)
+{
+ unsigned int di_flags;
+
+ /* can't set PREALLOC this way, just preserve it */
+ di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
+ if (xflags & XFS_XFLAG_IMMUTABLE)
+ di_flags |= XFS_DIFLAG_IMMUTABLE;
+ if (xflags & XFS_XFLAG_APPEND)
+ di_flags |= XFS_DIFLAG_APPEND;
+ if (xflags & XFS_XFLAG_SYNC)
+ di_flags |= XFS_DIFLAG_SYNC;
+ if (xflags & XFS_XFLAG_NOATIME)
+ di_flags |= XFS_DIFLAG_NOATIME;
+ if (xflags & XFS_XFLAG_NODUMP)
+ di_flags |= XFS_DIFLAG_NODUMP;
+ if (xflags & XFS_XFLAG_PROJINHERIT)
+ di_flags |= XFS_DIFLAG_PROJINHERIT;
+ if (xflags & XFS_XFLAG_NODEFRAG)
+ di_flags |= XFS_DIFLAG_NODEFRAG;
+ if (xflags & XFS_XFLAG_FILESTREAM)
+ di_flags |= XFS_DIFLAG_FILESTREAM;
+ if (S_ISDIR(ip->i_d.di_mode)) {
+ if (xflags & XFS_XFLAG_RTINHERIT)
+ di_flags |= XFS_DIFLAG_RTINHERIT;
+ if (xflags & XFS_XFLAG_NOSYMLINKS)
+ di_flags |= XFS_DIFLAG_NOSYMLINKS;
+ if (xflags & XFS_XFLAG_EXTSZINHERIT)
+ di_flags |= XFS_DIFLAG_EXTSZINHERIT;
+ } else if (S_ISREG(ip->i_d.di_mode)) {
+ if (xflags & XFS_XFLAG_REALTIME)
+ di_flags |= XFS_DIFLAG_REALTIME;
+ if (xflags & XFS_XFLAG_EXTSIZE)
+ di_flags |= XFS_DIFLAG_EXTSIZE;
+ }
+
+ ip->i_d.di_flags = di_flags;
+}
+
+STATIC void
+xfs_diflags_to_linux(
+ struct xfs_inode *ip)
+{
+ struct inode *inode = VFS_I(ip);
+ unsigned int xflags = xfs_ip2xflags(ip);
+
+ if (xflags & XFS_XFLAG_IMMUTABLE)
+ inode->i_flags |= S_IMMUTABLE;
+ else
+ inode->i_flags &= ~S_IMMUTABLE;
+ if (xflags & XFS_XFLAG_APPEND)
+ inode->i_flags |= S_APPEND;
+ else
+ inode->i_flags &= ~S_APPEND;
+ if (xflags & XFS_XFLAG_SYNC)
+ inode->i_flags |= S_SYNC;
+ else
+ inode->i_flags &= ~S_SYNC;
+ if (xflags & XFS_XFLAG_NOATIME)
+ inode->i_flags |= S_NOATIME;
+ else
+ inode->i_flags &= ~S_NOATIME;
+}
+
+#define FSX_PROJID 1
+#define FSX_EXTSIZE 2
+#define FSX_XFLAGS 4
+#define FSX_NONBLOCK 8
+
+STATIC int
+xfs_ioctl_setattr(
+ xfs_inode_t *ip,
+ struct fsxattr *fa,
+ int mask)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_trans *tp;
+ unsigned int lock_flags = 0;
+ struct xfs_dquot *udqp = NULL;
+ struct xfs_dquot *gdqp = NULL;
+ struct xfs_dquot *olddquot = NULL;
+ int code;
+
+ trace_xfs_ioctl_setattr(ip);
+
+ if (mp->m_flags & XFS_MOUNT_RDONLY)
+ return XFS_ERROR(EROFS);
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ /*
+ * Disallow 32bit project ids when projid32bit feature is not enabled.
+ */
+ if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
+ !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
+ return XFS_ERROR(EINVAL);
+
+ /*
+ * If disk quotas is on, we make sure that the dquots do exist on disk,
+ * before we start any other transactions. Trying to do this later
+ * is messy. We don't care to take a readlock to look at the ids
+ * in inode here, because we can't hold it across the trans_reserve.
+ * If the IDs do change before we take the ilock, we're covered
+ * because the i_*dquot fields will get updated anyway.
+ */
+ if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
+ code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
+ ip->i_d.di_gid, fa->fsx_projid,
+ XFS_QMOPT_PQUOTA, &udqp, &gdqp);
+ if (code)
+ return code;
+ }
+
+ /*
+ * For the other attributes, we acquire the inode lock and
+ * first do an error checking pass.
+ */
+ tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
+ code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
+ if (code)
+ goto error_return;
+
+ lock_flags = XFS_ILOCK_EXCL;
+ xfs_ilock(ip, lock_flags);
+
+ /*
+ * CAP_FOWNER overrides the following restrictions:
+ *
+ * The user ID of the calling process must be equal
+ * to the file owner ID, except in cases where the
+ * CAP_FSETID capability is applicable.
+ */
+ if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
+ code = XFS_ERROR(EPERM);
+ goto error_return;
+ }
+
+ /*
+ * Do a quota reservation only if projid is actually going to change.
+ */
+ if (mask & FSX_PROJID) {
+ if (XFS_IS_QUOTA_RUNNING(mp) &&
+ XFS_IS_PQUOTA_ON(mp) &&
+ xfs_get_projid(ip) != fa->fsx_projid) {
+ ASSERT(tp);
+ code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
+ capable(CAP_FOWNER) ?
+ XFS_QMOPT_FORCE_RES : 0);
+ if (code) /* out of quota */
+ goto error_return;
+ }
+ }
+
+ if (mask & FSX_EXTSIZE) {
+ /*
+ * Can't change extent size if any extents are allocated.
+ */
+ if (ip->i_d.di_nextents &&
+ ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
+ fa->fsx_extsize)) {
+ code = XFS_ERROR(EINVAL); /* EFBIG? */
+ goto error_return;
+ }
+
+ /*
+ * Extent size must be a multiple of the appropriate block
+ * size, if set at all. It must also be smaller than the
+ * maximum extent size supported by the filesystem.
+ *
+ * Also, for non-realtime files, limit the extent size hint to
+ * half the size of the AGs in the filesystem so alignment
+ * doesn't result in extents larger than an AG.
+ */
+ if (fa->fsx_extsize != 0) {
+ xfs_extlen_t size;
+ xfs_fsblock_t extsize_fsb;
+
+ extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
+ if (extsize_fsb > MAXEXTLEN) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+
+ if (XFS_IS_REALTIME_INODE(ip) ||
+ ((mask & FSX_XFLAGS) &&
+ (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
+ size = mp->m_sb.sb_rextsize <<
+ mp->m_sb.sb_blocklog;
+ } else {
+ size = mp->m_sb.sb_blocksize;
+ if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+ }
+
+ if (fa->fsx_extsize % size) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+ }
+ }
+
+
+ if (mask & FSX_XFLAGS) {
+ /*
+ * Can't change realtime flag if any extents are allocated.
+ */
+ if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
+ (XFS_IS_REALTIME_INODE(ip)) !=
+ (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
+ code = XFS_ERROR(EINVAL); /* EFBIG? */
+ goto error_return;
+ }
+
+ /*
+ * If realtime flag is set then must have realtime data.
+ */
+ if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
+ if ((mp->m_sb.sb_rblocks == 0) ||
+ (mp->m_sb.sb_rextsize == 0) ||
+ (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+ }
+
+ /*
+ * Can't modify an immutable/append-only file unless
+ * we have appropriate permission.
+ */
+ if ((ip->i_d.di_flags &
+ (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
+ (fa->fsx_xflags &
+ (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
+ !capable(CAP_LINUX_IMMUTABLE)) {
+ code = XFS_ERROR(EPERM);
+ goto error_return;
+ }
+ }
+
+ xfs_trans_ijoin(tp, ip);
+
+ /*
+ * Change file ownership. Must be the owner or privileged.
+ */
+ if (mask & FSX_PROJID) {
+ /*
+ * CAP_FSETID overrides the following restrictions:
+ *
+ * The set-user-ID and set-group-ID bits of a file will be
+ * cleared upon successful return from chown()
+ */
+ if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
+ !capable(CAP_FSETID))
+ ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
+
+ /*
+ * Change the ownerships and register quota modifications
+ * in the transaction.
+ */
+ if (xfs_get_projid(ip) != fa->fsx_projid) {
+ if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
+ olddquot = xfs_qm_vop_chown(tp, ip,
+ &ip->i_gdquot, gdqp);
+ }
+ xfs_set_projid(ip, fa->fsx_projid);
+
+ /*
+ * We may have to rev the inode as well as
+ * the superblock version number since projids didn't
+ * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
+ */
+ if (ip->i_d.di_version == 1)
+ xfs_bump_ino_vers2(tp, ip);
+ }
+
+ }
+
+ if (mask & FSX_EXTSIZE)
+ ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
+ if (mask & FSX_XFLAGS) {
+ xfs_set_diflags(ip, fa->fsx_xflags);
+ xfs_diflags_to_linux(ip);
+ }
+
+ xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+
+ XFS_STATS_INC(xs_ig_attrchg);
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * transaction goes to disk before returning to the user.
+ * This is slightly sub-optimal in that truncates require
+ * two sync transactions instead of one for wsync filesystems.
+ * One for the truncate and one for the timestamps since we
+ * don't want to change the timestamps unless we're sure the
+ * truncate worked. Truncates are less than 1% of the laddis
+ * mix so this probably isn't worth the trouble to optimize.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC)
+ xfs_trans_set_sync(tp);
+ code = xfs_trans_commit(tp, 0);
+ xfs_iunlock(ip, lock_flags);
+
+ /*
+ * Release any dquot(s) the inode had kept before chown.
+ */
+ xfs_qm_dqrele(olddquot);
+ xfs_qm_dqrele(udqp);
+ xfs_qm_dqrele(gdqp);
+
+ return code;
+
+ error_return:
+ xfs_qm_dqrele(udqp);
+ xfs_qm_dqrele(gdqp);
+ xfs_trans_cancel(tp, 0);
+ if (lock_flags)
+ xfs_iunlock(ip, lock_flags);
+ return code;
+}
+
+STATIC int
+xfs_ioc_fssetxattr(
+ xfs_inode_t *ip,
+ struct file *filp,
+ void __user *arg)
+{
+ struct fsxattr fa;
+ unsigned int mask;
+
+ if (copy_from_user(&fa, arg, sizeof(fa)))
+ return -EFAULT;
+
+ mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
+ if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
+ mask |= FSX_NONBLOCK;
+
+ return -xfs_ioctl_setattr(ip, &fa, mask);
+}
+
+STATIC int
+xfs_ioc_getxflags(
+ xfs_inode_t *ip,
+ void __user *arg)
+{
+ unsigned int flags;
+
+ flags = xfs_di2lxflags(ip->i_d.di_flags);
+ if (copy_to_user(arg, &flags, sizeof(flags)))
+ return -EFAULT;
+ return 0;
+}
+
+STATIC int
+xfs_ioc_setxflags(
+ xfs_inode_t *ip,
+ struct file *filp,
+ void __user *arg)
+{
+ struct fsxattr fa;
+ unsigned int flags;
+ unsigned int mask;
+
+ if (copy_from_user(&flags, arg, sizeof(flags)))
+ return -EFAULT;
+
+ if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
+ FS_NOATIME_FL | FS_NODUMP_FL | \
+ FS_SYNC_FL))
+ return -EOPNOTSUPP;
+
+ mask = FSX_XFLAGS;
+ if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
+ mask |= FSX_NONBLOCK;
+ fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
+
+ return -xfs_ioctl_setattr(ip, &fa, mask);
+}
+
+STATIC int
+xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
+{
+ struct getbmap __user *base = *ap;
+
+ /* copy only getbmap portion (not getbmapx) */
+ if (copy_to_user(base, bmv, sizeof(struct getbmap)))
+ return XFS_ERROR(EFAULT);
+
+ *ap += sizeof(struct getbmap);
+ return 0;
+}
+
+STATIC int
+xfs_ioc_getbmap(
+ struct xfs_inode *ip,
+ int ioflags,
+ unsigned int cmd,
+ void __user *arg)
+{
+ struct getbmapx bmx;
+ int error;
+
+ if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
+ return -XFS_ERROR(EFAULT);
+
+ if (bmx.bmv_count < 2)
+ return -XFS_ERROR(EINVAL);
+
+ bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
+ if (ioflags & IO_INVIS)
+ bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
+
+ error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
+ (struct getbmap *)arg+1);
+ if (error)
+ return -error;
+
+ /* copy back header - only size of getbmap */
+ if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+}
+
+STATIC int
+xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
+{
+ struct getbmapx __user *base = *ap;
+
+ if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
+ return XFS_ERROR(EFAULT);
+
+ *ap += sizeof(struct getbmapx);
+ return 0;
+}
+
+STATIC int
+xfs_ioc_getbmapx(
+ struct xfs_inode *ip,
+ void __user *arg)
+{
+ struct getbmapx bmx;
+ int error;
+
+ if (copy_from_user(&bmx, arg, sizeof(bmx)))
+ return -XFS_ERROR(EFAULT);
+
+ if (bmx.bmv_count < 2)
+ return -XFS_ERROR(EINVAL);
+
+ if (bmx.bmv_iflags & (~BMV_IF_VALID))
+ return -XFS_ERROR(EINVAL);
+
+ error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
+ (struct getbmapx *)arg+1);
+ if (error)
+ return -error;
+
+ /* copy back header */
+ if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
+ return -XFS_ERROR(EFAULT);
+
+ return 0;
+}
+
+/*
+ * Note: some of the ioctl's return positive numbers as a
+ * byte count indicating success, such as readlink_by_handle.
+ * So we don't "sign flip" like most other routines. This means
+ * true errors need to be returned as a negative value.
+ */
+long
+xfs_file_ioctl(
+ struct file *filp,
+ unsigned int cmd,
+ unsigned long p)
+{
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ struct xfs_inode *ip = XFS_I(inode);
+ struct xfs_mount *mp = ip->i_mount;
+ void __user *arg = (void __user *)p;
+ int ioflags = 0;
+ int error;
+
+ if (filp->f_mode & FMODE_NOCMTIME)
+ ioflags |= IO_INVIS;
+
+ trace_xfs_file_ioctl(ip);
+
+ switch (cmd) {
+ case FITRIM:
+ return xfs_ioc_trim(mp, arg);
+ 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:
+ case XFS_IOC_ZERO_RANGE: {
+ xfs_flock64_t bf;
+
+ if (copy_from_user(&bf, arg, sizeof(bf)))
+ return -XFS_ERROR(EFAULT);
+ return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
+ }
+ case XFS_IOC_DIOINFO: {
+ struct dioattr da;
+ xfs_buftarg_t *target =
+ XFS_IS_REALTIME_INODE(ip) ?
+ mp->m_rtdev_targp : mp->m_ddev_targp;
+
+ da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
+ da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
+
+ 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:
+ return put_user(inode->i_generation, (int __user *)arg);
+
+ case XFS_IOC_FSGETXATTR:
+ return xfs_ioc_fsgetxattr(ip, 0, arg);
+ case XFS_IOC_FSGETXATTRA:
+ return xfs_ioc_fsgetxattr(ip, 1, arg);
+ case XFS_IOC_FSSETXATTR:
+ return xfs_ioc_fssetxattr(ip, filp, arg);
+ case XFS_IOC_GETXFLAGS:
+ return xfs_ioc_getxflags(ip, arg);
+ 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 -XFS_ERROR(EFAULT);
+
+ error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
+ dmi.fsd_dmstate);
+ return -error;
+ }
+
+ case XFS_IOC_GETBMAP:
+ case XFS_IOC_GETBMAPA:
+ return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
+
+ case XFS_IOC_GETBMAPX:
+ return xfs_ioc_getbmapx(ip, arg);
+
+ case XFS_IOC_FD_TO_HANDLE:
+ case XFS_IOC_PATH_TO_HANDLE:
+ case XFS_IOC_PATH_TO_FSHANDLE: {
+ xfs_fsop_handlereq_t hreq;
+
+ if (copy_from_user(&hreq, arg, sizeof(hreq)))
+ return -XFS_ERROR(EFAULT);
+ return xfs_find_handle(cmd, &hreq);
+ }
+ case XFS_IOC_OPEN_BY_HANDLE: {
+ xfs_fsop_handlereq_t hreq;
+
+ if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
+ return -XFS_ERROR(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;
+
+ if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
+ return -XFS_ERROR(EFAULT);
+ return xfs_readlink_by_handle(filp, &hreq);
+ }
+ case XFS_IOC_ATTRLIST_BY_HANDLE:
+ return xfs_attrlist_by_handle(filp, arg);
+
+ case XFS_IOC_ATTRMULTI_BY_HANDLE:
+ return xfs_attrmulti_by_handle(filp, arg);
+
+ case XFS_IOC_SWAPEXT: {
+ struct xfs_swapext sxp;
+
+ if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
+ return -XFS_ERROR(EFAULT);
+ error = xfs_swapext(&sxp);
+ 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 (mp->m_flags & XFS_MOUNT_RDONLY)
+ return -XFS_ERROR(EROFS);
+
+ 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 (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 (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 (copy_from_user(&in, arg, sizeof(in)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_growfs_rt(mp, &in);
+ return -error;
+ }
+
+ 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, 1);
+ return -error;
+
+ default:
+ return -ENOTTY;
+ }
+}
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