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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.c1556
1 files changed, 0 insertions, 1556 deletions
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
deleted file mode 100644
index acca2c5..0000000
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ /dev/null
@@ -1,1556 +0,0 @@
-/*
- * 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 (inode->i_mode & S_IFREG) {
- 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 ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
- 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 ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
- 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;
- }
-}