Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs_log.h" |
| 21 | #include "xfs_trans.h" |
| 22 | #include "xfs_sb.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_bmap_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_dinode.h" |
| 28 | #include "xfs_inode.h" |
Hannes Eder | 7bf446f | 2009-03-05 15:20:25 +0100 | [diff] [blame] | 29 | #include "xfs_ioctl.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_rtalloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_itable.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 32 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_attr.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 34 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_buf_item.h" |
| 36 | #include "xfs_utils.h" |
| 37 | #include "xfs_dfrag.h" |
| 38 | #include "xfs_fsops.h" |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 39 | #include "xfs_vnodeops.h" |
Christoph Hellwig | a46db60 | 2011-01-07 13:02:04 +0000 | [diff] [blame] | 40 | #include "xfs_discard.h" |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 41 | #include "xfs_quota.h" |
| 42 | #include "xfs_inode_item.h" |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 43 | #include "xfs_export.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 44 | #include "xfs_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 46 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include <linux/dcache.h> |
| 48 | #include <linux/mount.h> |
| 49 | #include <linux/namei.h> |
| 50 | #include <linux/pagemap.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 51 | #include <linux/slab.h> |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 52 | #include <linux/exportfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | /* |
| 55 | * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to |
| 56 | * a file or fs handle. |
| 57 | * |
| 58 | * XFS_IOC_PATH_TO_FSHANDLE |
| 59 | * returns fs handle for a mount point or path within that mount point |
| 60 | * XFS_IOC_FD_TO_HANDLE |
| 61 | * returns full handle for a FD opened in user space |
| 62 | * XFS_IOC_PATH_TO_HANDLE |
| 63 | * returns full handle for a path |
| 64 | */ |
sandeen@sandeen.net | d5547f9 | 2008-11-25 21:20:08 -0600 | [diff] [blame] | 65 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | xfs_find_handle( |
| 67 | unsigned int cmd, |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 68 | xfs_fsop_handlereq_t *hreq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | { |
| 70 | int hsize; |
| 71 | xfs_handle_t handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | struct inode *inode; |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 73 | struct file *file = NULL; |
| 74 | struct path path; |
| 75 | int error; |
| 76 | struct xfs_inode *ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 78 | if (cmd == XFS_IOC_FD_TO_HANDLE) { |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 79 | file = fget(hreq->fd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | if (!file) |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 81 | return -EBADF; |
| 82 | inode = file->f_path.dentry->d_inode; |
| 83 | } else { |
| 84 | error = user_lpath((const char __user *)hreq->path, &path); |
| 85 | if (error) |
| 86 | return error; |
| 87 | inode = path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 89 | ip = XFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 91 | /* |
| 92 | * We can only generate handles for inodes residing on a XFS filesystem, |
| 93 | * and only for regular files, directories or symbolic links. |
| 94 | */ |
| 95 | error = -EINVAL; |
| 96 | if (inode->i_sb->s_magic != XFS_SB_MAGIC) |
| 97 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 99 | error = -EBADF; |
| 100 | if (!S_ISREG(inode->i_mode) && |
| 101 | !S_ISDIR(inode->i_mode) && |
| 102 | !S_ISLNK(inode->i_mode)) |
| 103 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 106 | memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 108 | if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { |
| 109 | /* |
| 110 | * This handle only contains an fsid, zero the rest. |
| 111 | */ |
| 112 | memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); |
| 113 | hsize = sizeof(xfs_fsid_t); |
| 114 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | int lock_mode; |
| 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | lock_mode = xfs_ilock_map_shared(ip); |
Christoph Hellwig | c614391 | 2007-09-14 15:22:37 +1000 | [diff] [blame] | 118 | handle.ha_fid.fid_len = sizeof(xfs_fid_t) - |
| 119 | sizeof(handle.ha_fid.fid_len); |
| 120 | handle.ha_fid.fid_pad = 0; |
| 121 | handle.ha_fid.fid_gen = ip->i_d.di_gen; |
| 122 | handle.ha_fid.fid_ino = ip->i_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | xfs_iunlock_map_shared(ip, lock_mode); |
| 124 | |
| 125 | hsize = XFS_HSIZE(handle); |
| 126 | } |
| 127 | |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 128 | error = -EFAULT; |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 129 | if (copy_to_user(hreq->ohandle, &handle, hsize) || |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 130 | copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) |
| 131 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | |
Christoph Hellwig | 4346cdd | 2009-02-08 21:51:14 +0100 | [diff] [blame] | 133 | error = 0; |
| 134 | |
| 135 | out_put: |
| 136 | if (cmd == XFS_IOC_FD_TO_HANDLE) |
| 137 | fput(file); |
| 138 | else |
| 139 | path_put(&path); |
| 140 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | } |
| 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | /* |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 144 | * No need to do permission checks on the various pathname components |
| 145 | * as the handle operations are privileged. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | */ |
| 147 | STATIC int |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 148 | xfs_handle_acceptable( |
| 149 | void *context, |
| 150 | struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 152 | return 1; |
| 153 | } |
| 154 | |
| 155 | /* |
| 156 | * Convert userspace handle data into a dentry. |
| 157 | */ |
| 158 | struct dentry * |
| 159 | xfs_handle_to_dentry( |
| 160 | struct file *parfilp, |
| 161 | void __user *uhandle, |
| 162 | u32 hlen) |
| 163 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | xfs_handle_t handle; |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 165 | struct xfs_fid64 fid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
| 167 | /* |
| 168 | * Only allow handle opens under a directory. |
| 169 | */ |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 170 | if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode)) |
| 171 | return ERR_PTR(-ENOTDIR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 173 | if (hlen != sizeof(xfs_handle_t)) |
| 174 | return ERR_PTR(-EINVAL); |
| 175 | if (copy_from_user(&handle, uhandle, hlen)) |
| 176 | return ERR_PTR(-EFAULT); |
| 177 | if (handle.ha_fid.fid_len != |
| 178 | sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) |
| 179 | return ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 181 | memset(&fid, 0, sizeof(struct fid)); |
| 182 | fid.ino = handle.ha_fid.fid_ino; |
| 183 | fid.gen = handle.ha_fid.fid_gen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 185 | return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, |
| 186 | FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, |
| 187 | xfs_handle_acceptable, NULL); |
| 188 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 190 | STATIC struct dentry * |
| 191 | xfs_handlereq_to_dentry( |
| 192 | struct file *parfilp, |
| 193 | xfs_fsop_handlereq_t *hreq) |
| 194 | { |
| 195 | return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | } |
| 197 | |
sandeen@sandeen.net | d5547f9 | 2008-11-25 21:20:08 -0600 | [diff] [blame] | 198 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | xfs_open_by_handle( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | struct file *parfilp, |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 201 | xfs_fsop_handlereq_t *hreq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
David Howells | 745ca24 | 2008-11-14 10:39:22 +1100 | [diff] [blame] | 203 | const struct cred *cred = current_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | int error; |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 205 | int fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | int permflag; |
| 207 | struct file *filp; |
| 208 | struct inode *inode; |
| 209 | struct dentry *dentry; |
Dave Chinner | 1a1d772 | 2012-03-22 05:15:06 +0000 | [diff] [blame] | 210 | fmode_t fmode; |
Al Viro | 765927b | 2012-06-26 21:58:53 +0400 | [diff] [blame] | 211 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
| 213 | if (!capable(CAP_SYS_ADMIN)) |
| 214 | return -XFS_ERROR(EPERM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 216 | dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| 217 | if (IS_ERR(dentry)) |
| 218 | return PTR_ERR(dentry); |
| 219 | inode = dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
| 221 | /* Restrict xfs_open_by_handle to directories & regular files. */ |
| 222 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 223 | error = -XFS_ERROR(EPERM); |
| 224 | goto out_dput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | #if BITS_PER_LONG != 32 |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 228 | hreq->oflags |= O_LARGEFILE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | #endif |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 230 | |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 231 | permflag = hreq->oflags; |
Dave Chinner | 1a1d772 | 2012-03-22 05:15:06 +0000 | [diff] [blame] | 232 | fmode = OPEN_FMODE(permflag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && |
Dave Chinner | 1a1d772 | 2012-03-22 05:15:06 +0000 | [diff] [blame] | 234 | (fmode & FMODE_WRITE) && IS_APPEND(inode)) { |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 235 | error = -XFS_ERROR(EPERM); |
| 236 | goto out_dput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | } |
| 238 | |
Dave Chinner | 1a1d772 | 2012-03-22 05:15:06 +0000 | [diff] [blame] | 239 | if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 240 | error = -XFS_ERROR(EACCES); |
| 241 | goto out_dput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | /* Can't write directories. */ |
Dave Chinner | 1a1d772 | 2012-03-22 05:15:06 +0000 | [diff] [blame] | 245 | if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 246 | error = -XFS_ERROR(EISDIR); |
| 247 | goto out_dput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | } |
| 249 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 250 | fd = get_unused_fd(); |
| 251 | if (fd < 0) { |
| 252 | error = fd; |
| 253 | goto out_dput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | } |
| 255 | |
Al Viro | 765927b | 2012-06-26 21:58:53 +0400 | [diff] [blame] | 256 | path.mnt = parfilp->f_path.mnt; |
| 257 | path.dentry = dentry; |
| 258 | filp = dentry_open(&path, hreq->oflags, cred); |
| 259 | dput(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | if (IS_ERR(filp)) { |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 261 | put_unused_fd(fd); |
| 262 | return PTR_ERR(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } |
Christoph Hellwig | 4d4be48 | 2008-12-09 04:47:33 -0500 | [diff] [blame] | 264 | |
Al Viro | 0320937 | 2011-07-25 20:54:24 -0400 | [diff] [blame] | 265 | if (S_ISREG(inode->i_mode)) { |
Vlad Apostolov | 2e2e7bb | 2006-11-11 18:04:47 +1100 | [diff] [blame] | 266 | filp->f_flags |= O_NOATIME; |
Christoph Hellwig | 4d4be48 | 2008-12-09 04:47:33 -0500 | [diff] [blame] | 267 | filp->f_mode |= FMODE_NOCMTIME; |
Vlad Apostolov | 2e2e7bb | 2006-11-11 18:04:47 +1100 | [diff] [blame] | 268 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 270 | fd_install(fd, filp); |
| 271 | return fd; |
| 272 | |
| 273 | out_dput: |
| 274 | dput(dentry); |
| 275 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 278 | /* |
| 279 | * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's |
| 280 | * unused first argument. |
| 281 | */ |
| 282 | STATIC int |
| 283 | do_readlink( |
| 284 | char __user *buffer, |
| 285 | int buflen, |
| 286 | const char *link) |
| 287 | { |
| 288 | int len; |
| 289 | |
| 290 | len = PTR_ERR(link); |
| 291 | if (IS_ERR(link)) |
| 292 | goto out; |
| 293 | |
| 294 | len = strlen(link); |
| 295 | if (len > (unsigned) buflen) |
| 296 | len = buflen; |
| 297 | if (copy_to_user(buffer, link, len)) |
| 298 | len = -EFAULT; |
| 299 | out: |
| 300 | return len; |
| 301 | } |
| 302 | |
| 303 | |
sandeen@sandeen.net | d5547f9 | 2008-11-25 21:20:08 -0600 | [diff] [blame] | 304 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | xfs_readlink_by_handle( |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 306 | struct file *parfilp, |
| 307 | xfs_fsop_handlereq_t *hreq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | { |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 309 | struct dentry *dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | __u32 olen; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 311 | void *link; |
| 312 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
| 314 | if (!capable(CAP_SYS_ADMIN)) |
| 315 | return -XFS_ERROR(EPERM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 317 | dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| 318 | if (IS_ERR(dentry)) |
| 319 | return PTR_ERR(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
| 321 | /* Restrict this handle operation to symlinks only. */ |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 322 | if (!S_ISLNK(dentry->d_inode->i_mode)) { |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 323 | error = -XFS_ERROR(EINVAL); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 324 | goto out_dput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |
| 326 | |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 327 | if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 328 | error = -XFS_ERROR(EFAULT); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 329 | goto out_dput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 332 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 333 | if (!link) { |
| 334 | error = -XFS_ERROR(ENOMEM); |
| 335 | goto out_dput; |
| 336 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 338 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 339 | if (error) |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 340 | goto out_kfree; |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 341 | error = do_readlink(hreq->ohandle, olen, link); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 342 | if (error) |
| 343 | goto out_kfree; |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 344 | |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 345 | out_kfree: |
| 346 | kfree(link); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 347 | out_dput: |
| 348 | dput(dentry); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 349 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | STATIC int |
| 353 | xfs_fssetdm_by_handle( |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 354 | struct file *parfilp, |
| 355 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | { |
| 357 | int error; |
| 358 | struct fsdmidata fsd; |
| 359 | xfs_fsop_setdm_handlereq_t dmhreq; |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 360 | struct dentry *dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
| 362 | if (!capable(CAP_MKNOD)) |
| 363 | return -XFS_ERROR(EPERM); |
| 364 | if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) |
| 365 | return -XFS_ERROR(EFAULT); |
| 366 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 367 | error = mnt_want_write_file(parfilp); |
| 368 | if (error) |
| 369 | return error; |
| 370 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 371 | dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 372 | if (IS_ERR(dentry)) { |
| 373 | mnt_drop_write_file(parfilp); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 374 | return PTR_ERR(dentry); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 375 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 377 | if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) { |
Christoph Hellwig | 6e7f75e | 2007-10-11 18:09:50 +1000 | [diff] [blame] | 378 | error = -XFS_ERROR(EPERM); |
| 379 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { |
Christoph Hellwig | 6e7f75e | 2007-10-11 18:09:50 +1000 | [diff] [blame] | 383 | error = -XFS_ERROR(EFAULT); |
| 384 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | } |
| 386 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 387 | error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask, |
Christoph Hellwig | 6e7f75e | 2007-10-11 18:09:50 +1000 | [diff] [blame] | 388 | fsd.fsd_dmstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
Christoph Hellwig | 6e7f75e | 2007-10-11 18:09:50 +1000 | [diff] [blame] | 390 | out: |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 391 | mnt_drop_write_file(parfilp); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 392 | dput(dentry); |
Christoph Hellwig | 6e7f75e | 2007-10-11 18:09:50 +1000 | [diff] [blame] | 393 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | STATIC int |
| 397 | xfs_attrlist_by_handle( |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 398 | struct file *parfilp, |
| 399 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | { |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 401 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | attrlist_cursor_kern_t *cursor; |
| 403 | xfs_fsop_attrlist_handlereq_t al_hreq; |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 404 | struct dentry *dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | char *kbuf; |
| 406 | |
| 407 | if (!capable(CAP_SYS_ADMIN)) |
| 408 | return -XFS_ERROR(EPERM); |
| 409 | if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) |
| 410 | return -XFS_ERROR(EFAULT); |
| 411 | if (al_hreq.buflen > XATTR_LIST_MAX) |
| 412 | return -XFS_ERROR(EINVAL); |
| 413 | |
Christoph Hellwig | 90ad58a | 2008-06-27 13:32:19 +1000 | [diff] [blame] | 414 | /* |
| 415 | * Reject flags, only allow namespaces. |
| 416 | */ |
| 417 | if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) |
| 418 | return -XFS_ERROR(EINVAL); |
| 419 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 420 | dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); |
| 421 | if (IS_ERR(dentry)) |
| 422 | return PTR_ERR(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
Kulikov Vasiliy | 6762b93 | 2010-10-30 14:26:17 +0000 | [diff] [blame] | 424 | kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | if (!kbuf) |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 426 | goto out_dput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
| 428 | cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 429 | error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen, |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 430 | al_hreq.flags, cursor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | if (error) |
| 432 | goto out_kfree; |
| 433 | |
| 434 | if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) |
| 435 | error = -EFAULT; |
| 436 | |
| 437 | out_kfree: |
| 438 | kfree(kbuf); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 439 | out_dput: |
| 440 | dput(dentry); |
| 441 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } |
| 443 | |
sandeen@sandeen.net | 2875097 | 2008-11-25 21:20:15 -0600 | [diff] [blame] | 444 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | xfs_attrmulti_attr_get( |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 446 | struct inode *inode, |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 447 | unsigned char *name, |
| 448 | unsigned char __user *ubuf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | __uint32_t *len, |
| 450 | __uint32_t flags) |
| 451 | { |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 452 | unsigned char *kbuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | int error = EFAULT; |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | if (*len > XATTR_SIZE_MAX) |
| 456 | return EINVAL; |
Dave Chinner | ad650f5 | 2012-03-07 04:50:21 +0000 | [diff] [blame] | 457 | kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL); |
| 458 | if (!kbuf) { |
| 459 | kbuf = kmem_zalloc_large(*len); |
| 460 | if (!kbuf) |
| 461 | return ENOMEM; |
| 462 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 464 | error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | if (error) |
| 466 | goto out_kfree; |
| 467 | |
| 468 | if (copy_to_user(ubuf, kbuf, *len)) |
| 469 | error = EFAULT; |
| 470 | |
| 471 | out_kfree: |
Dave Chinner | ad650f5 | 2012-03-07 04:50:21 +0000 | [diff] [blame] | 472 | if (is_vmalloc_addr(kbuf)) |
| 473 | kmem_free_large(kbuf); |
| 474 | else |
| 475 | kmem_free(kbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | return error; |
| 477 | } |
| 478 | |
sandeen@sandeen.net | 2875097 | 2008-11-25 21:20:15 -0600 | [diff] [blame] | 479 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | xfs_attrmulti_attr_set( |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 481 | struct inode *inode, |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 482 | unsigned char *name, |
| 483 | const unsigned char __user *ubuf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | __uint32_t len, |
| 485 | __uint32_t flags) |
| 486 | { |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 487 | unsigned char *kbuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | int error = EFAULT; |
| 489 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 490 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | return EPERM; |
| 492 | if (len > XATTR_SIZE_MAX) |
| 493 | return EINVAL; |
| 494 | |
Li Zefan | 0e639bd | 2009-04-08 15:08:04 +0800 | [diff] [blame] | 495 | kbuf = memdup_user(ubuf, len); |
| 496 | if (IS_ERR(kbuf)) |
| 497 | return PTR_ERR(kbuf); |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 498 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 499 | error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | return error; |
| 502 | } |
| 503 | |
sandeen@sandeen.net | 2875097 | 2008-11-25 21:20:15 -0600 | [diff] [blame] | 504 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | xfs_attrmulti_attr_remove( |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 506 | struct inode *inode, |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 507 | unsigned char *name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | __uint32_t flags) |
| 509 | { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 510 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | return EPERM; |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 512 | return xfs_attr_remove(XFS_I(inode), name, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | STATIC int |
| 516 | xfs_attrmulti_by_handle( |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 517 | struct file *parfilp, |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 518 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | { |
| 520 | int error; |
| 521 | xfs_attr_multiop_t *ops; |
| 522 | xfs_fsop_attrmulti_handlereq_t am_hreq; |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 523 | struct dentry *dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | unsigned int i, size; |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 525 | unsigned char *attr_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
| 527 | if (!capable(CAP_SYS_ADMIN)) |
| 528 | return -XFS_ERROR(EPERM); |
| 529 | if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) |
| 530 | return -XFS_ERROR(EFAULT); |
| 531 | |
Zhitong Wang | fda168c | 2010-03-23 09:51:22 +1100 | [diff] [blame] | 532 | /* overflow check */ |
| 533 | if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) |
| 534 | return -E2BIG; |
| 535 | |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 536 | dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); |
| 537 | if (IS_ERR(dentry)) |
| 538 | return PTR_ERR(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
| 540 | error = E2BIG; |
Christoph Hellwig | e182f57 | 2008-06-27 13:32:31 +1000 | [diff] [blame] | 541 | size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | if (!size || size > 16 * PAGE_SIZE) |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 543 | goto out_dput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
Li Zefan | 0e639bd | 2009-04-08 15:08:04 +0800 | [diff] [blame] | 545 | ops = memdup_user(am_hreq.ops, size); |
| 546 | if (IS_ERR(ops)) { |
| 547 | error = PTR_ERR(ops); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 548 | goto out_dput; |
Li Zefan | 0e639bd | 2009-04-08 15:08:04 +0800 | [diff] [blame] | 549 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
| 551 | attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); |
| 552 | if (!attr_name) |
| 553 | goto out_kfree_ops; |
| 554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | error = 0; |
| 556 | for (i = 0; i < am_hreq.opcount; i++) { |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 557 | ops[i].am_error = strncpy_from_user((char *)attr_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | ops[i].am_attrname, MAXNAMELEN); |
| 559 | if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) |
| 560 | error = -ERANGE; |
| 561 | if (ops[i].am_error < 0) |
| 562 | break; |
| 563 | |
| 564 | switch (ops[i].am_opcode) { |
| 565 | case ATTR_OP_GET: |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 566 | ops[i].am_error = xfs_attrmulti_attr_get( |
| 567 | dentry->d_inode, attr_name, |
| 568 | ops[i].am_attrvalue, &ops[i].am_length, |
| 569 | ops[i].am_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | break; |
| 571 | case ATTR_OP_SET: |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 572 | ops[i].am_error = mnt_want_write_file(parfilp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 573 | if (ops[i].am_error) |
| 574 | break; |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 575 | ops[i].am_error = xfs_attrmulti_attr_set( |
| 576 | dentry->d_inode, attr_name, |
| 577 | ops[i].am_attrvalue, ops[i].am_length, |
| 578 | ops[i].am_flags); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 579 | mnt_drop_write_file(parfilp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | break; |
| 581 | case ATTR_OP_REMOVE: |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 582 | ops[i].am_error = mnt_want_write_file(parfilp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 583 | if (ops[i].am_error) |
| 584 | break; |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 585 | ops[i].am_error = xfs_attrmulti_attr_remove( |
| 586 | dentry->d_inode, attr_name, |
| 587 | ops[i].am_flags); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 588 | mnt_drop_write_file(parfilp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | break; |
| 590 | default: |
| 591 | ops[i].am_error = EINVAL; |
| 592 | } |
| 593 | } |
| 594 | |
| 595 | if (copy_to_user(am_hreq.ops, ops, size)) |
| 596 | error = XFS_ERROR(EFAULT); |
| 597 | |
| 598 | kfree(attr_name); |
| 599 | out_kfree_ops: |
| 600 | kfree(ops); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 601 | out_dput: |
| 602 | dput(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | return -error; |
| 604 | } |
| 605 | |
sandeen@sandeen.net | d5547f9 | 2008-11-25 21:20:08 -0600 | [diff] [blame] | 606 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | xfs_ioc_space( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 608 | struct xfs_inode *ip, |
Alexey Dobriyan | f37ea14 | 2006-09-28 10:52:04 +1000 | [diff] [blame] | 609 | struct inode *inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | struct file *filp, |
| 611 | int ioflags, |
| 612 | unsigned int cmd, |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 613 | xfs_flock64_t *bf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | int attr_flags = 0; |
| 616 | int error; |
| 617 | |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 618 | /* |
| 619 | * Only allow the sys admin to reserve space unless |
| 620 | * unwritten extents are enabled. |
| 621 | */ |
| 622 | if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && |
| 623 | !capable(CAP_SYS_ADMIN)) |
| 624 | return -XFS_ERROR(EPERM); |
| 625 | |
Alexey Dobriyan | f37ea14 | 2006-09-28 10:52:04 +1000 | [diff] [blame] | 626 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | return -XFS_ERROR(EPERM); |
| 628 | |
Eric Sandeen | ad4a8ac | 2005-09-02 16:41:16 +1000 | [diff] [blame] | 629 | if (!(filp->f_mode & FMODE_WRITE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | return -XFS_ERROR(EBADF); |
| 631 | |
Alexey Dobriyan | f37ea14 | 2006-09-28 10:52:04 +1000 | [diff] [blame] | 632 | if (!S_ISREG(inode->i_mode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | return -XFS_ERROR(EINVAL); |
| 634 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 636 | attr_flags |= XFS_ATTR_NONBLOCK; |
Dave Chinner | 8287889 | 2011-03-26 09:13:08 +1100 | [diff] [blame] | 637 | |
| 638 | if (filp->f_flags & O_DSYNC) |
| 639 | attr_flags |= XFS_ATTR_SYNC; |
| 640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | if (ioflags & IO_INVIS) |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 642 | attr_flags |= XFS_ATTR_DMI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 644 | error = mnt_want_write_file(filp); |
| 645 | if (error) |
| 646 | return error; |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 647 | error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 648 | mnt_drop_write_file(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | return -error; |
| 650 | } |
| 651 | |
| 652 | STATIC int |
| 653 | xfs_ioc_bulkstat( |
| 654 | xfs_mount_t *mp, |
| 655 | unsigned int cmd, |
| 656 | void __user *arg) |
| 657 | { |
| 658 | xfs_fsop_bulkreq_t bulkreq; |
| 659 | int count; /* # of records returned */ |
| 660 | xfs_ino_t inlast; /* last inode number */ |
| 661 | int done; |
| 662 | int error; |
| 663 | |
| 664 | /* done = 1 if there are more stats to get and if bulkstat */ |
| 665 | /* should be called again (unused here, but used in dmapi) */ |
| 666 | |
| 667 | if (!capable(CAP_SYS_ADMIN)) |
| 668 | return -EPERM; |
| 669 | |
| 670 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 671 | return -XFS_ERROR(EIO); |
| 672 | |
| 673 | if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) |
| 674 | return -XFS_ERROR(EFAULT); |
| 675 | |
| 676 | if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) |
| 677 | return -XFS_ERROR(EFAULT); |
| 678 | |
| 679 | if ((count = bulkreq.icount) <= 0) |
| 680 | return -XFS_ERROR(EINVAL); |
| 681 | |
Lachlan McIlroy | cd57e59 | 2007-11-23 16:30:32 +1100 | [diff] [blame] | 682 | if (bulkreq.ubuffer == NULL) |
| 683 | return -XFS_ERROR(EINVAL); |
| 684 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | if (cmd == XFS_IOC_FSINUMBERS) |
| 686 | error = xfs_inumbers(mp, &inlast, &count, |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 687 | bulkreq.ubuffer, xfs_inumbers_fmt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) |
| 689 | error = xfs_bulkstat_single(mp, &inlast, |
| 690 | bulkreq.ubuffer, &done); |
Lachlan McIlroy | cd57e59 | 2007-11-23 16:30:32 +1100 | [diff] [blame] | 691 | else /* XFS_IOC_FSBULKSTAT */ |
Christoph Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 692 | error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, |
| 693 | sizeof(xfs_bstat_t), bulkreq.ubuffer, |
| 694 | &done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
| 696 | if (error) |
| 697 | return -error; |
| 698 | |
| 699 | if (bulkreq.ocount != NULL) { |
| 700 | if (copy_to_user(bulkreq.lastip, &inlast, |
| 701 | sizeof(xfs_ino_t))) |
| 702 | return -XFS_ERROR(EFAULT); |
| 703 | |
| 704 | if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) |
| 705 | return -XFS_ERROR(EFAULT); |
| 706 | } |
| 707 | |
| 708 | return 0; |
| 709 | } |
| 710 | |
| 711 | STATIC int |
| 712 | xfs_ioc_fsgeometry_v1( |
| 713 | xfs_mount_t *mp, |
| 714 | void __user *arg) |
| 715 | { |
Alex Elder | eeb2036 | 2011-03-01 17:50:00 +0000 | [diff] [blame] | 716 | xfs_fsop_geom_t fsgeo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | int error; |
| 718 | |
Alex Elder | eeb2036 | 2011-03-01 17:50:00 +0000 | [diff] [blame] | 719 | error = xfs_fs_geometry(mp, &fsgeo, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | if (error) |
| 721 | return -error; |
| 722 | |
Alex Elder | eeb2036 | 2011-03-01 17:50:00 +0000 | [diff] [blame] | 723 | /* |
| 724 | * Caller should have passed an argument of type |
| 725 | * xfs_fsop_geom_v1_t. This is a proper subset of the |
| 726 | * xfs_fsop_geom_t that xfs_fs_geometry() fills in. |
| 727 | */ |
| 728 | if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | return -XFS_ERROR(EFAULT); |
| 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | STATIC int |
| 734 | xfs_ioc_fsgeometry( |
| 735 | xfs_mount_t *mp, |
| 736 | void __user *arg) |
| 737 | { |
| 738 | xfs_fsop_geom_t fsgeo; |
| 739 | int error; |
| 740 | |
| 741 | error = xfs_fs_geometry(mp, &fsgeo, 4); |
| 742 | if (error) |
| 743 | return -error; |
| 744 | |
| 745 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) |
| 746 | return -XFS_ERROR(EFAULT); |
| 747 | return 0; |
| 748 | } |
| 749 | |
| 750 | /* |
| 751 | * Linux extended inode flags interface. |
| 752 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | |
| 754 | STATIC unsigned int |
| 755 | xfs_merge_ioc_xflags( |
| 756 | unsigned int flags, |
| 757 | unsigned int start) |
| 758 | { |
| 759 | unsigned int xflags = start; |
| 760 | |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 761 | if (flags & FS_IMMUTABLE_FL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | xflags |= XFS_XFLAG_IMMUTABLE; |
| 763 | else |
| 764 | xflags &= ~XFS_XFLAG_IMMUTABLE; |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 765 | if (flags & FS_APPEND_FL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | xflags |= XFS_XFLAG_APPEND; |
| 767 | else |
| 768 | xflags &= ~XFS_XFLAG_APPEND; |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 769 | if (flags & FS_SYNC_FL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | xflags |= XFS_XFLAG_SYNC; |
| 771 | else |
| 772 | xflags &= ~XFS_XFLAG_SYNC; |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 773 | if (flags & FS_NOATIME_FL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | xflags |= XFS_XFLAG_NOATIME; |
| 775 | else |
| 776 | xflags &= ~XFS_XFLAG_NOATIME; |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 777 | if (flags & FS_NODUMP_FL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | xflags |= XFS_XFLAG_NODUMP; |
| 779 | else |
| 780 | xflags &= ~XFS_XFLAG_NODUMP; |
| 781 | |
| 782 | return xflags; |
| 783 | } |
| 784 | |
| 785 | STATIC unsigned int |
| 786 | xfs_di2lxflags( |
| 787 | __uint16_t di_flags) |
| 788 | { |
| 789 | unsigned int flags = 0; |
| 790 | |
| 791 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 792 | flags |= FS_IMMUTABLE_FL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | if (di_flags & XFS_DIFLAG_APPEND) |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 794 | flags |= FS_APPEND_FL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | if (di_flags & XFS_DIFLAG_SYNC) |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 796 | flags |= FS_SYNC_FL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | if (di_flags & XFS_DIFLAG_NOATIME) |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 798 | flags |= FS_NOATIME_FL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | if (di_flags & XFS_DIFLAG_NODUMP) |
Eric Sandeen | 39058a0 | 2007-02-10 18:37:10 +1100 | [diff] [blame] | 800 | flags |= FS_NODUMP_FL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | return flags; |
| 802 | } |
| 803 | |
| 804 | STATIC int |
Christoph Hellwig | c83bfab | 2007-10-11 17:47:00 +1000 | [diff] [blame] | 805 | xfs_ioc_fsgetxattr( |
| 806 | xfs_inode_t *ip, |
| 807 | int attr, |
| 808 | void __user *arg) |
| 809 | { |
| 810 | struct fsxattr fa; |
| 811 | |
Dan Rosenberg | a122eb2 | 2010-09-06 18:24:57 -0400 | [diff] [blame] | 812 | memset(&fa, 0, sizeof(struct fsxattr)); |
| 813 | |
Christoph Hellwig | c83bfab | 2007-10-11 17:47:00 +1000 | [diff] [blame] | 814 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 815 | fa.fsx_xflags = xfs_ip2xflags(ip); |
| 816 | fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 817 | fa.fsx_projid = xfs_get_projid(ip); |
Christoph Hellwig | c83bfab | 2007-10-11 17:47:00 +1000 | [diff] [blame] | 818 | |
| 819 | if (attr) { |
| 820 | if (ip->i_afp) { |
| 821 | if (ip->i_afp->if_flags & XFS_IFEXTENTS) |
| 822 | fa.fsx_nextents = ip->i_afp->if_bytes / |
| 823 | sizeof(xfs_bmbt_rec_t); |
| 824 | else |
| 825 | fa.fsx_nextents = ip->i_d.di_anextents; |
| 826 | } else |
| 827 | fa.fsx_nextents = 0; |
| 828 | } else { |
| 829 | if (ip->i_df.if_flags & XFS_IFEXTENTS) |
| 830 | fa.fsx_nextents = ip->i_df.if_bytes / |
| 831 | sizeof(xfs_bmbt_rec_t); |
| 832 | else |
| 833 | fa.fsx_nextents = ip->i_d.di_nextents; |
| 834 | } |
| 835 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 836 | |
| 837 | if (copy_to_user(arg, &fa, sizeof(fa))) |
| 838 | return -EFAULT; |
| 839 | return 0; |
| 840 | } |
| 841 | |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 842 | STATIC void |
| 843 | xfs_set_diflags( |
| 844 | struct xfs_inode *ip, |
| 845 | unsigned int xflags) |
| 846 | { |
| 847 | unsigned int di_flags; |
| 848 | |
| 849 | /* can't set PREALLOC this way, just preserve it */ |
| 850 | di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); |
| 851 | if (xflags & XFS_XFLAG_IMMUTABLE) |
| 852 | di_flags |= XFS_DIFLAG_IMMUTABLE; |
| 853 | if (xflags & XFS_XFLAG_APPEND) |
| 854 | di_flags |= XFS_DIFLAG_APPEND; |
| 855 | if (xflags & XFS_XFLAG_SYNC) |
| 856 | di_flags |= XFS_DIFLAG_SYNC; |
| 857 | if (xflags & XFS_XFLAG_NOATIME) |
| 858 | di_flags |= XFS_DIFLAG_NOATIME; |
| 859 | if (xflags & XFS_XFLAG_NODUMP) |
| 860 | di_flags |= XFS_DIFLAG_NODUMP; |
| 861 | if (xflags & XFS_XFLAG_PROJINHERIT) |
| 862 | di_flags |= XFS_DIFLAG_PROJINHERIT; |
| 863 | if (xflags & XFS_XFLAG_NODEFRAG) |
| 864 | di_flags |= XFS_DIFLAG_NODEFRAG; |
| 865 | if (xflags & XFS_XFLAG_FILESTREAM) |
| 866 | di_flags |= XFS_DIFLAG_FILESTREAM; |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 867 | if (S_ISDIR(ip->i_d.di_mode)) { |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 868 | if (xflags & XFS_XFLAG_RTINHERIT) |
| 869 | di_flags |= XFS_DIFLAG_RTINHERIT; |
| 870 | if (xflags & XFS_XFLAG_NOSYMLINKS) |
| 871 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
| 872 | if (xflags & XFS_XFLAG_EXTSZINHERIT) |
| 873 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 874 | } else if (S_ISREG(ip->i_d.di_mode)) { |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 875 | if (xflags & XFS_XFLAG_REALTIME) |
| 876 | di_flags |= XFS_DIFLAG_REALTIME; |
| 877 | if (xflags & XFS_XFLAG_EXTSIZE) |
| 878 | di_flags |= XFS_DIFLAG_EXTSIZE; |
| 879 | } |
| 880 | |
| 881 | ip->i_d.di_flags = di_flags; |
| 882 | } |
| 883 | |
Christoph Hellwig | f13fae2 | 2008-07-21 16:16:15 +1000 | [diff] [blame] | 884 | STATIC void |
| 885 | xfs_diflags_to_linux( |
| 886 | struct xfs_inode *ip) |
| 887 | { |
David Chinner | e4f7529 | 2008-08-13 16:00:45 +1000 | [diff] [blame] | 888 | struct inode *inode = VFS_I(ip); |
Christoph Hellwig | f13fae2 | 2008-07-21 16:16:15 +1000 | [diff] [blame] | 889 | unsigned int xflags = xfs_ip2xflags(ip); |
| 890 | |
| 891 | if (xflags & XFS_XFLAG_IMMUTABLE) |
| 892 | inode->i_flags |= S_IMMUTABLE; |
| 893 | else |
| 894 | inode->i_flags &= ~S_IMMUTABLE; |
| 895 | if (xflags & XFS_XFLAG_APPEND) |
| 896 | inode->i_flags |= S_APPEND; |
| 897 | else |
| 898 | inode->i_flags &= ~S_APPEND; |
| 899 | if (xflags & XFS_XFLAG_SYNC) |
| 900 | inode->i_flags |= S_SYNC; |
| 901 | else |
| 902 | inode->i_flags &= ~S_SYNC; |
| 903 | if (xflags & XFS_XFLAG_NOATIME) |
| 904 | inode->i_flags |= S_NOATIME; |
| 905 | else |
| 906 | inode->i_flags &= ~S_NOATIME; |
| 907 | } |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 908 | |
| 909 | #define FSX_PROJID 1 |
| 910 | #define FSX_EXTSIZE 2 |
| 911 | #define FSX_XFLAGS 4 |
| 912 | #define FSX_NONBLOCK 8 |
| 913 | |
| 914 | STATIC int |
| 915 | xfs_ioctl_setattr( |
| 916 | xfs_inode_t *ip, |
| 917 | struct fsxattr *fa, |
| 918 | int mask) |
| 919 | { |
| 920 | struct xfs_mount *mp = ip->i_mount; |
| 921 | struct xfs_trans *tp; |
| 922 | unsigned int lock_flags = 0; |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 923 | struct xfs_dquot *udqp = NULL; |
| 924 | struct xfs_dquot *gdqp = NULL; |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 925 | struct xfs_dquot *olddquot = NULL; |
| 926 | int code; |
| 927 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 928 | trace_xfs_ioctl_setattr(ip); |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 929 | |
| 930 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 931 | return XFS_ERROR(EROFS); |
| 932 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 933 | return XFS_ERROR(EIO); |
| 934 | |
| 935 | /* |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 936 | * Disallow 32bit project ids when projid32bit feature is not enabled. |
Arkadiusz Mi?kiewicz | 23963e5 | 2010-08-26 10:19:43 +0000 | [diff] [blame] | 937 | */ |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 938 | if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) && |
| 939 | !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) |
Arkadiusz Mi?kiewicz | 23963e5 | 2010-08-26 10:19:43 +0000 | [diff] [blame] | 940 | return XFS_ERROR(EINVAL); |
| 941 | |
| 942 | /* |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 943 | * If disk quotas is on, we make sure that the dquots do exist on disk, |
| 944 | * before we start any other transactions. Trying to do this later |
| 945 | * is messy. We don't care to take a readlock to look at the ids |
| 946 | * in inode here, because we can't hold it across the trans_reserve. |
| 947 | * If the IDs do change before we take the ilock, we're covered |
| 948 | * because the i_*dquot fields will get updated anyway. |
| 949 | */ |
| 950 | if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) { |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 951 | code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 952 | ip->i_d.di_gid, fa->fsx_projid, |
| 953 | XFS_QMOPT_PQUOTA, &udqp, &gdqp); |
| 954 | if (code) |
| 955 | return code; |
| 956 | } |
| 957 | |
| 958 | /* |
| 959 | * For the other attributes, we acquire the inode lock and |
| 960 | * first do an error checking pass. |
| 961 | */ |
| 962 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); |
| 963 | code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0); |
| 964 | if (code) |
| 965 | goto error_return; |
| 966 | |
| 967 | lock_flags = XFS_ILOCK_EXCL; |
| 968 | xfs_ilock(ip, lock_flags); |
| 969 | |
| 970 | /* |
| 971 | * CAP_FOWNER overrides the following restrictions: |
| 972 | * |
| 973 | * The user ID of the calling process must be equal |
| 974 | * to the file owner ID, except in cases where the |
| 975 | * CAP_FSETID capability is applicable. |
| 976 | */ |
David Howells | 91b777125 | 2008-10-31 15:50:04 +1100 | [diff] [blame] | 977 | if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) { |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 978 | code = XFS_ERROR(EPERM); |
| 979 | goto error_return; |
| 980 | } |
| 981 | |
| 982 | /* |
| 983 | * Do a quota reservation only if projid is actually going to change. |
| 984 | */ |
| 985 | if (mask & FSX_PROJID) { |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 986 | if (XFS_IS_QUOTA_RUNNING(mp) && |
| 987 | XFS_IS_PQUOTA_ON(mp) && |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 988 | xfs_get_projid(ip) != fa->fsx_projid) { |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 989 | ASSERT(tp); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 990 | code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 991 | capable(CAP_FOWNER) ? |
| 992 | XFS_QMOPT_FORCE_RES : 0); |
| 993 | if (code) /* out of quota */ |
| 994 | goto error_return; |
| 995 | } |
| 996 | } |
| 997 | |
| 998 | if (mask & FSX_EXTSIZE) { |
| 999 | /* |
| 1000 | * Can't change extent size if any extents are allocated. |
| 1001 | */ |
| 1002 | if (ip->i_d.di_nextents && |
| 1003 | ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != |
| 1004 | fa->fsx_extsize)) { |
| 1005 | code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| 1006 | goto error_return; |
| 1007 | } |
| 1008 | |
| 1009 | /* |
| 1010 | * Extent size must be a multiple of the appropriate block |
Dave Chinner | 5315837 | 2011-01-27 12:18:18 +1100 | [diff] [blame] | 1011 | * size, if set at all. It must also be smaller than the |
| 1012 | * maximum extent size supported by the filesystem. |
| 1013 | * |
| 1014 | * Also, for non-realtime files, limit the extent size hint to |
| 1015 | * half the size of the AGs in the filesystem so alignment |
| 1016 | * doesn't result in extents larger than an AG. |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1017 | */ |
| 1018 | if (fa->fsx_extsize != 0) { |
Dave Chinner | 5315837 | 2011-01-27 12:18:18 +1100 | [diff] [blame] | 1019 | xfs_extlen_t size; |
| 1020 | xfs_fsblock_t extsize_fsb; |
| 1021 | |
| 1022 | extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); |
| 1023 | if (extsize_fsb > MAXEXTLEN) { |
| 1024 | code = XFS_ERROR(EINVAL); |
| 1025 | goto error_return; |
| 1026 | } |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1027 | |
| 1028 | if (XFS_IS_REALTIME_INODE(ip) || |
| 1029 | ((mask & FSX_XFLAGS) && |
| 1030 | (fa->fsx_xflags & XFS_XFLAG_REALTIME))) { |
| 1031 | size = mp->m_sb.sb_rextsize << |
| 1032 | mp->m_sb.sb_blocklog; |
| 1033 | } else { |
| 1034 | size = mp->m_sb.sb_blocksize; |
Dave Chinner | 5315837 | 2011-01-27 12:18:18 +1100 | [diff] [blame] | 1035 | if (extsize_fsb > mp->m_sb.sb_agblocks / 2) { |
| 1036 | code = XFS_ERROR(EINVAL); |
| 1037 | goto error_return; |
| 1038 | } |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1039 | } |
| 1040 | |
| 1041 | if (fa->fsx_extsize % size) { |
| 1042 | code = XFS_ERROR(EINVAL); |
| 1043 | goto error_return; |
| 1044 | } |
| 1045 | } |
| 1046 | } |
| 1047 | |
| 1048 | |
| 1049 | if (mask & FSX_XFLAGS) { |
| 1050 | /* |
| 1051 | * Can't change realtime flag if any extents are allocated. |
| 1052 | */ |
| 1053 | if ((ip->i_d.di_nextents || ip->i_delayed_blks) && |
| 1054 | (XFS_IS_REALTIME_INODE(ip)) != |
| 1055 | (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { |
| 1056 | code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| 1057 | goto error_return; |
| 1058 | } |
| 1059 | |
| 1060 | /* |
| 1061 | * If realtime flag is set then must have realtime data. |
| 1062 | */ |
| 1063 | if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) { |
| 1064 | if ((mp->m_sb.sb_rblocks == 0) || |
| 1065 | (mp->m_sb.sb_rextsize == 0) || |
| 1066 | (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { |
| 1067 | code = XFS_ERROR(EINVAL); |
| 1068 | goto error_return; |
| 1069 | } |
| 1070 | } |
| 1071 | |
| 1072 | /* |
| 1073 | * Can't modify an immutable/append-only file unless |
| 1074 | * we have appropriate permission. |
| 1075 | */ |
| 1076 | if ((ip->i_d.di_flags & |
| 1077 | (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || |
| 1078 | (fa->fsx_xflags & |
| 1079 | (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && |
| 1080 | !capable(CAP_LINUX_IMMUTABLE)) { |
| 1081 | code = XFS_ERROR(EPERM); |
| 1082 | goto error_return; |
| 1083 | } |
| 1084 | } |
| 1085 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1086 | xfs_trans_ijoin(tp, ip, 0); |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1087 | |
| 1088 | /* |
| 1089 | * Change file ownership. Must be the owner or privileged. |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1090 | */ |
| 1091 | if (mask & FSX_PROJID) { |
| 1092 | /* |
| 1093 | * CAP_FSETID overrides the following restrictions: |
| 1094 | * |
| 1095 | * The set-user-ID and set-group-ID bits of a file will be |
| 1096 | * cleared upon successful return from chown() |
| 1097 | */ |
| 1098 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && |
| 1099 | !capable(CAP_FSETID)) |
| 1100 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); |
| 1101 | |
| 1102 | /* |
| 1103 | * Change the ownerships and register quota modifications |
| 1104 | * in the transaction. |
| 1105 | */ |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1106 | if (xfs_get_projid(ip) != fa->fsx_projid) { |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1107 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { |
| 1108 | olddquot = xfs_qm_vop_chown(tp, ip, |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1109 | &ip->i_gdquot, gdqp); |
| 1110 | } |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1111 | xfs_set_projid(ip, fa->fsx_projid); |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1112 | |
| 1113 | /* |
| 1114 | * We may have to rev the inode as well as |
| 1115 | * the superblock version number since projids didn't |
| 1116 | * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. |
| 1117 | */ |
Christoph Hellwig | 51ce16d | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 1118 | if (ip->i_d.di_version == 1) |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1119 | xfs_bump_ino_vers2(tp, ip); |
| 1120 | } |
| 1121 | |
| 1122 | } |
| 1123 | |
| 1124 | if (mask & FSX_EXTSIZE) |
| 1125 | ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; |
Christoph Hellwig | f13fae2 | 2008-07-21 16:16:15 +1000 | [diff] [blame] | 1126 | if (mask & FSX_XFLAGS) { |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1127 | xfs_set_diflags(ip, fa->fsx_xflags); |
Christoph Hellwig | f13fae2 | 2008-07-21 16:16:15 +1000 | [diff] [blame] | 1128 | xfs_diflags_to_linux(ip); |
| 1129 | } |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1130 | |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 1131 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1132 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1133 | |
| 1134 | XFS_STATS_INC(xs_ig_attrchg); |
| 1135 | |
| 1136 | /* |
| 1137 | * If this is a synchronous mount, make sure that the |
| 1138 | * transaction goes to disk before returning to the user. |
| 1139 | * This is slightly sub-optimal in that truncates require |
| 1140 | * two sync transactions instead of one for wsync filesystems. |
| 1141 | * One for the truncate and one for the timestamps since we |
| 1142 | * don't want to change the timestamps unless we're sure the |
| 1143 | * truncate worked. Truncates are less than 1% of the laddis |
| 1144 | * mix so this probably isn't worth the trouble to optimize. |
| 1145 | */ |
| 1146 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 1147 | xfs_trans_set_sync(tp); |
| 1148 | code = xfs_trans_commit(tp, 0); |
| 1149 | xfs_iunlock(ip, lock_flags); |
| 1150 | |
| 1151 | /* |
| 1152 | * Release any dquot(s) the inode had kept before chown. |
| 1153 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1154 | xfs_qm_dqrele(olddquot); |
| 1155 | xfs_qm_dqrele(udqp); |
| 1156 | xfs_qm_dqrele(gdqp); |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1157 | |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1158 | return code; |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1159 | |
| 1160 | error_return: |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1161 | xfs_qm_dqrele(udqp); |
| 1162 | xfs_qm_dqrele(gdqp); |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1163 | xfs_trans_cancel(tp, 0); |
| 1164 | if (lock_flags) |
| 1165 | xfs_iunlock(ip, lock_flags); |
| 1166 | return code; |
| 1167 | } |
| 1168 | |
Christoph Hellwig | c83bfab | 2007-10-11 17:47:00 +1000 | [diff] [blame] | 1169 | STATIC int |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1170 | xfs_ioc_fssetxattr( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | xfs_inode_t *ip, |
| 1172 | struct file *filp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | void __user *arg) |
| 1174 | { |
| 1175 | struct fsxattr fa; |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1176 | unsigned int mask; |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1177 | int error; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1178 | |
| 1179 | if (copy_from_user(&fa, arg, sizeof(fa))) |
| 1180 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1182 | mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1183 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1184 | mask |= FSX_NONBLOCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1186 | error = mnt_want_write_file(filp); |
| 1187 | if (error) |
| 1188 | return error; |
| 1189 | error = xfs_ioctl_setattr(ip, &fa, mask); |
| 1190 | mnt_drop_write_file(filp); |
| 1191 | return -error; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1192 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1194 | STATIC int |
| 1195 | xfs_ioc_getxflags( |
| 1196 | xfs_inode_t *ip, |
| 1197 | void __user *arg) |
| 1198 | { |
| 1199 | unsigned int flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1201 | flags = xfs_di2lxflags(ip->i_d.di_flags); |
| 1202 | if (copy_to_user(arg, &flags, sizeof(flags))) |
| 1203 | return -EFAULT; |
| 1204 | return 0; |
| 1205 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1207 | STATIC int |
| 1208 | xfs_ioc_setxflags( |
| 1209 | xfs_inode_t *ip, |
| 1210 | struct file *filp, |
| 1211 | void __user *arg) |
| 1212 | { |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1213 | struct fsxattr fa; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1214 | unsigned int flags; |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1215 | unsigned int mask; |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1216 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1218 | if (copy_from_user(&flags, arg, sizeof(flags))) |
| 1219 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1221 | if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ |
| 1222 | FS_NOATIME_FL | FS_NODUMP_FL | \ |
| 1223 | FS_SYNC_FL)) |
| 1224 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1226 | mask = FSX_XFLAGS; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1227 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
Christoph Hellwig | 25fe55e | 2008-07-18 17:13:20 +1000 | [diff] [blame] | 1228 | mask |= FSX_NONBLOCK; |
| 1229 | fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1231 | error = mnt_want_write_file(filp); |
| 1232 | if (error) |
| 1233 | return error; |
| 1234 | error = xfs_ioctl_setattr(ip, &fa, mask); |
| 1235 | mnt_drop_write_file(filp); |
| 1236 | return -error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | } |
| 1238 | |
| 1239 | STATIC int |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1240 | xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) |
| 1241 | { |
| 1242 | struct getbmap __user *base = *ap; |
| 1243 | |
| 1244 | /* copy only getbmap portion (not getbmapx) */ |
| 1245 | if (copy_to_user(base, bmv, sizeof(struct getbmap))) |
| 1246 | return XFS_ERROR(EFAULT); |
| 1247 | |
| 1248 | *ap += sizeof(struct getbmap); |
| 1249 | return 0; |
| 1250 | } |
| 1251 | |
| 1252 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | xfs_ioc_getbmap( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1254 | struct xfs_inode *ip, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | int ioflags, |
| 1256 | unsigned int cmd, |
| 1257 | void __user *arg) |
| 1258 | { |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1259 | struct getbmapx bmx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | int error; |
| 1261 | |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1262 | if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | return -XFS_ERROR(EFAULT); |
| 1264 | |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1265 | if (bmx.bmv_count < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | return -XFS_ERROR(EINVAL); |
| 1267 | |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1268 | bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | if (ioflags & IO_INVIS) |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1270 | bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1272 | error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, |
| 1273 | (struct getbmap *)arg+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | if (error) |
| 1275 | return -error; |
| 1276 | |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1277 | /* copy back header - only size of getbmap */ |
| 1278 | if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | return -XFS_ERROR(EFAULT); |
| 1280 | return 0; |
| 1281 | } |
| 1282 | |
| 1283 | STATIC int |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1284 | xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) |
| 1285 | { |
| 1286 | struct getbmapx __user *base = *ap; |
| 1287 | |
| 1288 | if (copy_to_user(base, bmv, sizeof(struct getbmapx))) |
| 1289 | return XFS_ERROR(EFAULT); |
| 1290 | |
| 1291 | *ap += sizeof(struct getbmapx); |
| 1292 | return 0; |
| 1293 | } |
| 1294 | |
| 1295 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | xfs_ioc_getbmapx( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1297 | struct xfs_inode *ip, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | void __user *arg) |
| 1299 | { |
| 1300 | struct getbmapx bmx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | int error; |
| 1302 | |
| 1303 | if (copy_from_user(&bmx, arg, sizeof(bmx))) |
| 1304 | return -XFS_ERROR(EFAULT); |
| 1305 | |
| 1306 | if (bmx.bmv_count < 2) |
| 1307 | return -XFS_ERROR(EINVAL); |
| 1308 | |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1309 | if (bmx.bmv_iflags & (~BMV_IF_VALID)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | return -XFS_ERROR(EINVAL); |
| 1311 | |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1312 | error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, |
| 1313 | (struct getbmapx *)arg+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | if (error) |
| 1315 | return -error; |
| 1316 | |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1317 | /* copy back header */ |
| 1318 | if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | return -XFS_ERROR(EFAULT); |
| 1320 | |
| 1321 | return 0; |
| 1322 | } |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1323 | |
Christoph Hellwig | 4d4be48 | 2008-12-09 04:47:33 -0500 | [diff] [blame] | 1324 | /* |
| 1325 | * Note: some of the ioctl's return positive numbers as a |
| 1326 | * byte count indicating success, such as readlink_by_handle. |
| 1327 | * So we don't "sign flip" like most other routines. This means |
| 1328 | * true errors need to be returned as a negative value. |
| 1329 | */ |
| 1330 | long |
| 1331 | xfs_file_ioctl( |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1332 | struct file *filp, |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1333 | unsigned int cmd, |
Christoph Hellwig | 4d4be48 | 2008-12-09 04:47:33 -0500 | [diff] [blame] | 1334 | unsigned long p) |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1335 | { |
| 1336 | struct inode *inode = filp->f_path.dentry->d_inode; |
Christoph Hellwig | 4d4be48 | 2008-12-09 04:47:33 -0500 | [diff] [blame] | 1337 | struct xfs_inode *ip = XFS_I(inode); |
| 1338 | struct xfs_mount *mp = ip->i_mount; |
| 1339 | void __user *arg = (void __user *)p; |
| 1340 | int ioflags = 0; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1341 | int error; |
| 1342 | |
Christoph Hellwig | 4d4be48 | 2008-12-09 04:47:33 -0500 | [diff] [blame] | 1343 | if (filp->f_mode & FMODE_NOCMTIME) |
| 1344 | ioflags |= IO_INVIS; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1345 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1346 | trace_xfs_file_ioctl(ip); |
Christoph Hellwig | 4d4be48 | 2008-12-09 04:47:33 -0500 | [diff] [blame] | 1347 | |
| 1348 | switch (cmd) { |
Christoph Hellwig | a46db60 | 2011-01-07 13:02:04 +0000 | [diff] [blame] | 1349 | case FITRIM: |
| 1350 | return xfs_ioc_trim(mp, arg); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1351 | case XFS_IOC_ALLOCSP: |
| 1352 | case XFS_IOC_FREESP: |
| 1353 | case XFS_IOC_RESVSP: |
| 1354 | case XFS_IOC_UNRESVSP: |
| 1355 | case XFS_IOC_ALLOCSP64: |
| 1356 | case XFS_IOC_FREESP64: |
| 1357 | case XFS_IOC_RESVSP64: |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 1358 | case XFS_IOC_UNRESVSP64: |
| 1359 | case XFS_IOC_ZERO_RANGE: { |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1360 | xfs_flock64_t bf; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1361 | |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1362 | if (copy_from_user(&bf, arg, sizeof(bf))) |
| 1363 | return -XFS_ERROR(EFAULT); |
| 1364 | return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); |
| 1365 | } |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1366 | case XFS_IOC_DIOINFO: { |
| 1367 | struct dioattr da; |
| 1368 | xfs_buftarg_t *target = |
| 1369 | XFS_IS_REALTIME_INODE(ip) ? |
| 1370 | mp->m_rtdev_targp : mp->m_ddev_targp; |
| 1371 | |
| 1372 | da.d_mem = da.d_miniosz = 1 << target->bt_sshift; |
| 1373 | da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); |
| 1374 | |
| 1375 | if (copy_to_user(arg, &da, sizeof(da))) |
| 1376 | return -XFS_ERROR(EFAULT); |
| 1377 | return 0; |
| 1378 | } |
| 1379 | |
| 1380 | case XFS_IOC_FSBULKSTAT_SINGLE: |
| 1381 | case XFS_IOC_FSBULKSTAT: |
| 1382 | case XFS_IOC_FSINUMBERS: |
| 1383 | return xfs_ioc_bulkstat(mp, cmd, arg); |
| 1384 | |
| 1385 | case XFS_IOC_FSGEOMETRY_V1: |
| 1386 | return xfs_ioc_fsgeometry_v1(mp, arg); |
| 1387 | |
| 1388 | case XFS_IOC_FSGEOMETRY: |
| 1389 | return xfs_ioc_fsgeometry(mp, arg); |
| 1390 | |
| 1391 | case XFS_IOC_GETVERSION: |
| 1392 | return put_user(inode->i_generation, (int __user *)arg); |
| 1393 | |
| 1394 | case XFS_IOC_FSGETXATTR: |
| 1395 | return xfs_ioc_fsgetxattr(ip, 0, arg); |
| 1396 | case XFS_IOC_FSGETXATTRA: |
| 1397 | return xfs_ioc_fsgetxattr(ip, 1, arg); |
Lachlan McIlroy | 3b2816b | 2008-04-18 12:43:35 +1000 | [diff] [blame] | 1398 | case XFS_IOC_FSSETXATTR: |
Lachlan McIlroy | 65e67f5 | 2008-04-18 12:59:45 +1000 | [diff] [blame] | 1399 | return xfs_ioc_fssetxattr(ip, filp, arg); |
| 1400 | case XFS_IOC_GETXFLAGS: |
| 1401 | return xfs_ioc_getxflags(ip, arg); |
| 1402 | case XFS_IOC_SETXFLAGS: |
| 1403 | return xfs_ioc_setxflags(ip, filp, arg); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1404 | |
| 1405 | case XFS_IOC_FSSETDM: { |
| 1406 | struct fsdmidata dmi; |
| 1407 | |
| 1408 | if (copy_from_user(&dmi, arg, sizeof(dmi))) |
| 1409 | return -XFS_ERROR(EFAULT); |
| 1410 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1411 | error = mnt_want_write_file(filp); |
| 1412 | if (error) |
| 1413 | return error; |
| 1414 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1415 | error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, |
| 1416 | dmi.fsd_dmstate); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1417 | mnt_drop_write_file(filp); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1418 | return -error; |
| 1419 | } |
| 1420 | |
| 1421 | case XFS_IOC_GETBMAP: |
| 1422 | case XFS_IOC_GETBMAPA: |
| 1423 | return xfs_ioc_getbmap(ip, ioflags, cmd, arg); |
| 1424 | |
| 1425 | case XFS_IOC_GETBMAPX: |
| 1426 | return xfs_ioc_getbmapx(ip, arg); |
| 1427 | |
| 1428 | case XFS_IOC_FD_TO_HANDLE: |
| 1429 | case XFS_IOC_PATH_TO_HANDLE: |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1430 | case XFS_IOC_PATH_TO_FSHANDLE: { |
| 1431 | xfs_fsop_handlereq_t hreq; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1432 | |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1433 | if (copy_from_user(&hreq, arg, sizeof(hreq))) |
| 1434 | return -XFS_ERROR(EFAULT); |
| 1435 | return xfs_find_handle(cmd, &hreq); |
| 1436 | } |
| 1437 | case XFS_IOC_OPEN_BY_HANDLE: { |
| 1438 | xfs_fsop_handlereq_t hreq; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1439 | |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1440 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 1441 | return -XFS_ERROR(EFAULT); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 1442 | return xfs_open_by_handle(filp, &hreq); |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1443 | } |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1444 | case XFS_IOC_FSSETDM_BY_HANDLE: |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 1445 | return xfs_fssetdm_by_handle(filp, arg); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1446 | |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1447 | case XFS_IOC_READLINK_BY_HANDLE: { |
| 1448 | xfs_fsop_handlereq_t hreq; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1449 | |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1450 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 1451 | return -XFS_ERROR(EFAULT); |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 1452 | return xfs_readlink_by_handle(filp, &hreq); |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1453 | } |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1454 | case XFS_IOC_ATTRLIST_BY_HANDLE: |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 1455 | return xfs_attrlist_by_handle(filp, arg); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1456 | |
| 1457 | case XFS_IOC_ATTRMULTI_BY_HANDLE: |
Christoph Hellwig | d296d30 | 2009-01-19 02:02:57 +0100 | [diff] [blame] | 1458 | return xfs_attrmulti_by_handle(filp, arg); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1459 | |
| 1460 | case XFS_IOC_SWAPEXT: { |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1461 | struct xfs_swapext sxp; |
| 1462 | |
| 1463 | if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) |
| 1464 | return -XFS_ERROR(EFAULT); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1465 | error = mnt_want_write_file(filp); |
| 1466 | if (error) |
| 1467 | return error; |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 1468 | error = xfs_swapext(&sxp); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1469 | mnt_drop_write_file(filp); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1470 | return -error; |
| 1471 | } |
| 1472 | |
| 1473 | case XFS_IOC_FSCOUNTS: { |
| 1474 | xfs_fsop_counts_t out; |
| 1475 | |
| 1476 | error = xfs_fs_counts(mp, &out); |
| 1477 | if (error) |
| 1478 | return -error; |
| 1479 | |
| 1480 | if (copy_to_user(arg, &out, sizeof(out))) |
| 1481 | return -XFS_ERROR(EFAULT); |
| 1482 | return 0; |
| 1483 | } |
| 1484 | |
| 1485 | case XFS_IOC_SET_RESBLKS: { |
| 1486 | xfs_fsop_resblks_t inout; |
| 1487 | __uint64_t in; |
| 1488 | |
| 1489 | if (!capable(CAP_SYS_ADMIN)) |
| 1490 | return -EPERM; |
| 1491 | |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1492 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 1493 | return -XFS_ERROR(EROFS); |
| 1494 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1495 | if (copy_from_user(&inout, arg, sizeof(inout))) |
| 1496 | return -XFS_ERROR(EFAULT); |
| 1497 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1498 | error = mnt_want_write_file(filp); |
| 1499 | if (error) |
| 1500 | return error; |
| 1501 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1502 | /* input parameter is passed in resblks field of structure */ |
| 1503 | in = inout.resblks; |
| 1504 | error = xfs_reserve_blocks(mp, &in, &inout); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1505 | mnt_drop_write_file(filp); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1506 | if (error) |
| 1507 | return -error; |
| 1508 | |
| 1509 | if (copy_to_user(arg, &inout, sizeof(inout))) |
| 1510 | return -XFS_ERROR(EFAULT); |
| 1511 | return 0; |
| 1512 | } |
| 1513 | |
| 1514 | case XFS_IOC_GET_RESBLKS: { |
| 1515 | xfs_fsop_resblks_t out; |
| 1516 | |
| 1517 | if (!capable(CAP_SYS_ADMIN)) |
| 1518 | return -EPERM; |
| 1519 | |
| 1520 | error = xfs_reserve_blocks(mp, NULL, &out); |
| 1521 | if (error) |
| 1522 | return -error; |
| 1523 | |
| 1524 | if (copy_to_user(arg, &out, sizeof(out))) |
| 1525 | return -XFS_ERROR(EFAULT); |
| 1526 | |
| 1527 | return 0; |
| 1528 | } |
| 1529 | |
| 1530 | case XFS_IOC_FSGROWFSDATA: { |
| 1531 | xfs_growfs_data_t in; |
| 1532 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1533 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1534 | return -XFS_ERROR(EFAULT); |
| 1535 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1536 | error = mnt_want_write_file(filp); |
| 1537 | if (error) |
| 1538 | return error; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1539 | error = xfs_growfs_data(mp, &in); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1540 | mnt_drop_write_file(filp); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1541 | return -error; |
| 1542 | } |
| 1543 | |
| 1544 | case XFS_IOC_FSGROWFSLOG: { |
| 1545 | xfs_growfs_log_t in; |
| 1546 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1547 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1548 | return -XFS_ERROR(EFAULT); |
| 1549 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1550 | error = mnt_want_write_file(filp); |
| 1551 | if (error) |
| 1552 | return error; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1553 | error = xfs_growfs_log(mp, &in); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1554 | mnt_drop_write_file(filp); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1555 | return -error; |
| 1556 | } |
| 1557 | |
| 1558 | case XFS_IOC_FSGROWFSRT: { |
| 1559 | xfs_growfs_rt_t in; |
| 1560 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1561 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1562 | return -XFS_ERROR(EFAULT); |
| 1563 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1564 | error = mnt_want_write_file(filp); |
| 1565 | if (error) |
| 1566 | return error; |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1567 | error = xfs_growfs_rt(mp, &in); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame^] | 1568 | mnt_drop_write_file(filp); |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1569 | return -error; |
| 1570 | } |
| 1571 | |
Lachlan McIlroy | df26cfe | 2008-04-18 11:44:03 +1000 | [diff] [blame] | 1572 | case XFS_IOC_GOINGDOWN: { |
| 1573 | __uint32_t in; |
| 1574 | |
| 1575 | if (!capable(CAP_SYS_ADMIN)) |
| 1576 | return -EPERM; |
| 1577 | |
| 1578 | if (get_user(in, (__uint32_t __user *)arg)) |
| 1579 | return -XFS_ERROR(EFAULT); |
| 1580 | |
| 1581 | error = xfs_fs_goingdown(mp, in); |
| 1582 | return -error; |
| 1583 | } |
| 1584 | |
| 1585 | case XFS_IOC_ERROR_INJECTION: { |
| 1586 | xfs_error_injection_t in; |
| 1587 | |
| 1588 | if (!capable(CAP_SYS_ADMIN)) |
| 1589 | return -EPERM; |
| 1590 | |
| 1591 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1592 | return -XFS_ERROR(EFAULT); |
| 1593 | |
| 1594 | error = xfs_errortag_add(in.errtag, mp); |
| 1595 | return -error; |
| 1596 | } |
| 1597 | |
| 1598 | case XFS_IOC_ERROR_CLEARALL: |
| 1599 | if (!capable(CAP_SYS_ADMIN)) |
| 1600 | return -EPERM; |
| 1601 | |
| 1602 | error = xfs_errortag_clearall(mp, 1); |
| 1603 | return -error; |
| 1604 | |
| 1605 | default: |
| 1606 | return -ENOTTY; |
| 1607 | } |
| 1608 | } |