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" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 20 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 22 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "xfs_trans.h" |
| 24 | #include "xfs_sb.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 25 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_dir.h" |
| 27 | #include "xfs_dir2.h" |
| 28 | #include "xfs_alloc.h" |
| 29 | #include "xfs_dmapi.h" |
| 30 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 32 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include "xfs_dir_sf.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 35 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_dir2_sf.h" |
| 37 | #include "xfs_dinode.h" |
| 38 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 39 | #include "xfs_btree.h" |
| 40 | #include "xfs_ialloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include "xfs_rtalloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include "xfs_itable.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 43 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include "xfs_rw.h" |
| 45 | #include "xfs_acl.h" |
| 46 | #include "xfs_cap.h" |
| 47 | #include "xfs_mac.h" |
| 48 | #include "xfs_attr.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 49 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include "xfs_buf_item.h" |
| 51 | #include "xfs_utils.h" |
| 52 | #include "xfs_dfrag.h" |
| 53 | #include "xfs_fsops.h" |
| 54 | |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 55 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #include <linux/dcache.h> |
| 57 | #include <linux/mount.h> |
| 58 | #include <linux/namei.h> |
| 59 | #include <linux/pagemap.h> |
| 60 | |
| 61 | /* |
| 62 | * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to |
| 63 | * a file or fs handle. |
| 64 | * |
| 65 | * XFS_IOC_PATH_TO_FSHANDLE |
| 66 | * returns fs handle for a mount point or path within that mount point |
| 67 | * XFS_IOC_FD_TO_HANDLE |
| 68 | * returns full handle for a FD opened in user space |
| 69 | * XFS_IOC_PATH_TO_HANDLE |
| 70 | * returns full handle for a path |
| 71 | */ |
| 72 | STATIC int |
| 73 | xfs_find_handle( |
| 74 | unsigned int cmd, |
| 75 | void __user *arg) |
| 76 | { |
| 77 | int hsize; |
| 78 | xfs_handle_t handle; |
| 79 | xfs_fsop_handlereq_t hreq; |
| 80 | struct inode *inode; |
| 81 | struct vnode *vp; |
| 82 | |
| 83 | if (copy_from_user(&hreq, arg, sizeof(hreq))) |
| 84 | return -XFS_ERROR(EFAULT); |
| 85 | |
| 86 | memset((char *)&handle, 0, sizeof(handle)); |
| 87 | |
| 88 | switch (cmd) { |
| 89 | case XFS_IOC_PATH_TO_FSHANDLE: |
| 90 | case XFS_IOC_PATH_TO_HANDLE: { |
| 91 | struct nameidata nd; |
| 92 | int error; |
| 93 | |
| 94 | error = user_path_walk_link((const char __user *)hreq.path, &nd); |
| 95 | if (error) |
| 96 | return error; |
| 97 | |
| 98 | ASSERT(nd.dentry); |
| 99 | ASSERT(nd.dentry->d_inode); |
| 100 | inode = igrab(nd.dentry->d_inode); |
| 101 | path_release(&nd); |
| 102 | break; |
| 103 | } |
| 104 | |
| 105 | case XFS_IOC_FD_TO_HANDLE: { |
| 106 | struct file *file; |
| 107 | |
| 108 | file = fget(hreq.fd); |
| 109 | if (!file) |
| 110 | return -EBADF; |
| 111 | |
| 112 | ASSERT(file->f_dentry); |
| 113 | ASSERT(file->f_dentry->d_inode); |
| 114 | inode = igrab(file->f_dentry->d_inode); |
| 115 | fput(file); |
| 116 | break; |
| 117 | } |
| 118 | |
| 119 | default: |
| 120 | ASSERT(0); |
| 121 | return -XFS_ERROR(EINVAL); |
| 122 | } |
| 123 | |
| 124 | if (inode->i_sb->s_magic != XFS_SB_MAGIC) { |
| 125 | /* we're not in XFS anymore, Toto */ |
| 126 | iput(inode); |
| 127 | return -XFS_ERROR(EINVAL); |
| 128 | } |
| 129 | |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 130 | switch (inode->i_mode & S_IFMT) { |
| 131 | case S_IFREG: |
| 132 | case S_IFDIR: |
| 133 | case S_IFLNK: |
| 134 | break; |
| 135 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | iput(inode); |
| 137 | return -XFS_ERROR(EBADF); |
| 138 | } |
| 139 | |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 140 | /* we need the vnode */ |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 141 | vp = vn_from_inode(inode); |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | /* now we can grab the fsid */ |
| 144 | memcpy(&handle.ha_fsid, vp->v_vfsp->vfs_altfsid, sizeof(xfs_fsid_t)); |
| 145 | hsize = sizeof(xfs_fsid_t); |
| 146 | |
| 147 | if (cmd != XFS_IOC_PATH_TO_FSHANDLE) { |
| 148 | xfs_inode_t *ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | int lock_mode; |
| 150 | |
| 151 | /* need to get access to the xfs_inode to read the generation */ |
Christoph Hellwig | 75e17b3 | 2006-01-11 20:58:44 +1100 | [diff] [blame] | 152 | ip = xfs_vtoi(vp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | ASSERT(ip); |
| 154 | lock_mode = xfs_ilock_map_shared(ip); |
| 155 | |
| 156 | /* fill in fid section of handle from inode */ |
| 157 | handle.ha_fid.xfs_fid_len = sizeof(xfs_fid_t) - |
| 158 | sizeof(handle.ha_fid.xfs_fid_len); |
| 159 | handle.ha_fid.xfs_fid_pad = 0; |
| 160 | handle.ha_fid.xfs_fid_gen = ip->i_d.di_gen; |
| 161 | handle.ha_fid.xfs_fid_ino = ip->i_ino; |
| 162 | |
| 163 | xfs_iunlock_map_shared(ip, lock_mode); |
| 164 | |
| 165 | hsize = XFS_HSIZE(handle); |
| 166 | } |
| 167 | |
| 168 | /* now copy our handle into the user buffer & write out the size */ |
| 169 | if (copy_to_user(hreq.ohandle, &handle, hsize) || |
| 170 | copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) { |
| 171 | iput(inode); |
| 172 | return -XFS_ERROR(EFAULT); |
| 173 | } |
| 174 | |
| 175 | iput(inode); |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | |
| 180 | /* |
| 181 | * Convert userspace handle data into vnode (and inode). |
| 182 | * We [ab]use the fact that all the fsop_handlereq ioctl calls |
| 183 | * have a data structure argument whose first component is always |
| 184 | * a xfs_fsop_handlereq_t, so we can cast to and from this type. |
| 185 | * This allows us to optimise the copy_from_user calls and gives |
| 186 | * a handy, shared routine. |
| 187 | * |
| 188 | * If no error, caller must always VN_RELE the returned vp. |
| 189 | */ |
| 190 | STATIC int |
| 191 | xfs_vget_fsop_handlereq( |
| 192 | xfs_mount_t *mp, |
| 193 | struct inode *parinode, /* parent inode pointer */ |
| 194 | xfs_fsop_handlereq_t *hreq, |
| 195 | vnode_t **vp, |
| 196 | struct inode **inode) |
| 197 | { |
| 198 | void __user *hanp; |
| 199 | size_t hlen; |
| 200 | xfs_fid_t *xfid; |
| 201 | xfs_handle_t *handlep; |
| 202 | xfs_handle_t handle; |
| 203 | xfs_inode_t *ip; |
| 204 | struct inode *inodep; |
| 205 | vnode_t *vpp; |
| 206 | xfs_ino_t ino; |
| 207 | __u32 igen; |
| 208 | int error; |
| 209 | |
| 210 | /* |
| 211 | * Only allow handle opens under a directory. |
| 212 | */ |
| 213 | if (!S_ISDIR(parinode->i_mode)) |
| 214 | return XFS_ERROR(ENOTDIR); |
| 215 | |
| 216 | hanp = hreq->ihandle; |
| 217 | hlen = hreq->ihandlen; |
| 218 | handlep = &handle; |
| 219 | |
| 220 | if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep)) |
| 221 | return XFS_ERROR(EINVAL); |
| 222 | if (copy_from_user(handlep, hanp, hlen)) |
| 223 | return XFS_ERROR(EFAULT); |
| 224 | if (hlen < sizeof(*handlep)) |
| 225 | memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen); |
| 226 | if (hlen > sizeof(handlep->ha_fsid)) { |
| 227 | if (handlep->ha_fid.xfs_fid_len != |
| 228 | (hlen - sizeof(handlep->ha_fsid) |
| 229 | - sizeof(handlep->ha_fid.xfs_fid_len)) |
| 230 | || handlep->ha_fid.xfs_fid_pad) |
| 231 | return XFS_ERROR(EINVAL); |
| 232 | } |
| 233 | |
| 234 | /* |
| 235 | * Crack the handle, obtain the inode # & generation # |
| 236 | */ |
| 237 | xfid = (struct xfs_fid *)&handlep->ha_fid; |
| 238 | if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) { |
| 239 | ino = xfid->xfs_fid_ino; |
| 240 | igen = xfid->xfs_fid_gen; |
| 241 | } else { |
| 242 | return XFS_ERROR(EINVAL); |
| 243 | } |
| 244 | |
| 245 | /* |
| 246 | * Get the XFS inode, building a vnode to go with it. |
| 247 | */ |
| 248 | error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0); |
| 249 | if (error) |
| 250 | return error; |
| 251 | if (ip == NULL) |
| 252 | return XFS_ERROR(EIO); |
| 253 | if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) { |
| 254 | xfs_iput_new(ip, XFS_ILOCK_SHARED); |
| 255 | return XFS_ERROR(ENOENT); |
| 256 | } |
| 257 | |
| 258 | vpp = XFS_ITOV(ip); |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 259 | inodep = vn_to_inode(vpp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 261 | |
| 262 | *vp = vpp; |
| 263 | *inode = inodep; |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | STATIC int |
| 268 | xfs_open_by_handle( |
| 269 | xfs_mount_t *mp, |
| 270 | void __user *arg, |
| 271 | struct file *parfilp, |
| 272 | struct inode *parinode) |
| 273 | { |
| 274 | int error; |
| 275 | int new_fd; |
| 276 | int permflag; |
| 277 | struct file *filp; |
| 278 | struct inode *inode; |
| 279 | struct dentry *dentry; |
| 280 | vnode_t *vp; |
| 281 | xfs_fsop_handlereq_t hreq; |
| 282 | |
| 283 | if (!capable(CAP_SYS_ADMIN)) |
| 284 | return -XFS_ERROR(EPERM); |
| 285 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 286 | return -XFS_ERROR(EFAULT); |
| 287 | |
| 288 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode); |
| 289 | if (error) |
| 290 | return -error; |
| 291 | |
| 292 | /* Restrict xfs_open_by_handle to directories & regular files. */ |
| 293 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { |
| 294 | iput(inode); |
| 295 | return -XFS_ERROR(EINVAL); |
| 296 | } |
| 297 | |
| 298 | #if BITS_PER_LONG != 32 |
| 299 | hreq.oflags |= O_LARGEFILE; |
| 300 | #endif |
| 301 | /* Put open permission in namei format. */ |
| 302 | permflag = hreq.oflags; |
| 303 | if ((permflag+1) & O_ACCMODE) |
| 304 | permflag++; |
| 305 | if (permflag & O_TRUNC) |
| 306 | permflag |= 2; |
| 307 | |
| 308 | if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && |
| 309 | (permflag & FMODE_WRITE) && IS_APPEND(inode)) { |
| 310 | iput(inode); |
| 311 | return -XFS_ERROR(EPERM); |
| 312 | } |
| 313 | |
| 314 | if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) { |
| 315 | iput(inode); |
| 316 | return -XFS_ERROR(EACCES); |
| 317 | } |
| 318 | |
| 319 | /* Can't write directories. */ |
| 320 | if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) { |
| 321 | iput(inode); |
| 322 | return -XFS_ERROR(EISDIR); |
| 323 | } |
| 324 | |
| 325 | if ((new_fd = get_unused_fd()) < 0) { |
| 326 | iput(inode); |
| 327 | return new_fd; |
| 328 | } |
| 329 | |
| 330 | dentry = d_alloc_anon(inode); |
| 331 | if (dentry == NULL) { |
| 332 | iput(inode); |
| 333 | put_unused_fd(new_fd); |
| 334 | return -XFS_ERROR(ENOMEM); |
| 335 | } |
| 336 | |
| 337 | /* Ensure umount returns EBUSY on umounts while this file is open. */ |
| 338 | mntget(parfilp->f_vfsmnt); |
| 339 | |
| 340 | /* Create file pointer. */ |
| 341 | filp = dentry_open(dentry, parfilp->f_vfsmnt, hreq.oflags); |
| 342 | if (IS_ERR(filp)) { |
| 343 | put_unused_fd(new_fd); |
| 344 | return -XFS_ERROR(-PTR_ERR(filp)); |
| 345 | } |
| 346 | if (inode->i_mode & S_IFREG) |
Nathan Scott | 3562fd4 | 2006-03-14 14:00:35 +1100 | [diff] [blame] | 347 | filp->f_op = &xfs_invis_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
| 349 | fd_install(new_fd, filp); |
| 350 | return new_fd; |
| 351 | } |
| 352 | |
| 353 | STATIC int |
| 354 | xfs_readlink_by_handle( |
| 355 | xfs_mount_t *mp, |
| 356 | void __user *arg, |
| 357 | struct file *parfilp, |
| 358 | struct inode *parinode) |
| 359 | { |
| 360 | int error; |
| 361 | struct iovec aiov; |
| 362 | struct uio auio; |
| 363 | struct inode *inode; |
| 364 | xfs_fsop_handlereq_t hreq; |
| 365 | vnode_t *vp; |
| 366 | __u32 olen; |
| 367 | |
| 368 | if (!capable(CAP_SYS_ADMIN)) |
| 369 | return -XFS_ERROR(EPERM); |
| 370 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 371 | return -XFS_ERROR(EFAULT); |
| 372 | |
| 373 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode); |
| 374 | if (error) |
| 375 | return -error; |
| 376 | |
| 377 | /* Restrict this handle operation to symlinks only. */ |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 378 | if (!S_ISLNK(inode->i_mode)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | VN_RELE(vp); |
| 380 | return -XFS_ERROR(EINVAL); |
| 381 | } |
| 382 | |
| 383 | if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) { |
| 384 | VN_RELE(vp); |
| 385 | return -XFS_ERROR(EFAULT); |
| 386 | } |
| 387 | aiov.iov_len = olen; |
| 388 | aiov.iov_base = hreq.ohandle; |
| 389 | |
| 390 | auio.uio_iov = &aiov; |
| 391 | auio.uio_iovcnt = 1; |
| 392 | auio.uio_offset = 0; |
| 393 | auio.uio_segflg = UIO_USERSPACE; |
| 394 | auio.uio_resid = olen; |
| 395 | |
| 396 | VOP_READLINK(vp, &auio, IO_INVIS, NULL, error); |
| 397 | |
| 398 | VN_RELE(vp); |
| 399 | return (olen - auio.uio_resid); |
| 400 | } |
| 401 | |
| 402 | STATIC int |
| 403 | xfs_fssetdm_by_handle( |
| 404 | xfs_mount_t *mp, |
| 405 | void __user *arg, |
| 406 | struct file *parfilp, |
| 407 | struct inode *parinode) |
| 408 | { |
| 409 | int error; |
| 410 | struct fsdmidata fsd; |
| 411 | xfs_fsop_setdm_handlereq_t dmhreq; |
| 412 | struct inode *inode; |
| 413 | bhv_desc_t *bdp; |
| 414 | vnode_t *vp; |
| 415 | |
| 416 | if (!capable(CAP_MKNOD)) |
| 417 | return -XFS_ERROR(EPERM); |
| 418 | if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) |
| 419 | return -XFS_ERROR(EFAULT); |
| 420 | |
| 421 | error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &vp, &inode); |
| 422 | if (error) |
| 423 | return -error; |
| 424 | |
| 425 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) { |
| 426 | VN_RELE(vp); |
| 427 | return -XFS_ERROR(EPERM); |
| 428 | } |
| 429 | |
| 430 | if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { |
| 431 | VN_RELE(vp); |
| 432 | return -XFS_ERROR(EFAULT); |
| 433 | } |
| 434 | |
| 435 | bdp = bhv_base_unlocked(VN_BHV_HEAD(vp)); |
| 436 | error = xfs_set_dmattrs(bdp, fsd.fsd_dmevmask, fsd.fsd_dmstate, NULL); |
| 437 | |
| 438 | VN_RELE(vp); |
| 439 | if (error) |
| 440 | return -error; |
| 441 | return 0; |
| 442 | } |
| 443 | |
| 444 | STATIC int |
| 445 | xfs_attrlist_by_handle( |
| 446 | xfs_mount_t *mp, |
| 447 | void __user *arg, |
| 448 | struct file *parfilp, |
| 449 | struct inode *parinode) |
| 450 | { |
| 451 | int error; |
| 452 | attrlist_cursor_kern_t *cursor; |
| 453 | xfs_fsop_attrlist_handlereq_t al_hreq; |
| 454 | struct inode *inode; |
| 455 | vnode_t *vp; |
| 456 | char *kbuf; |
| 457 | |
| 458 | if (!capable(CAP_SYS_ADMIN)) |
| 459 | return -XFS_ERROR(EPERM); |
| 460 | if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) |
| 461 | return -XFS_ERROR(EFAULT); |
| 462 | if (al_hreq.buflen > XATTR_LIST_MAX) |
| 463 | return -XFS_ERROR(EINVAL); |
| 464 | |
| 465 | error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq, |
| 466 | &vp, &inode); |
| 467 | if (error) |
| 468 | goto out; |
| 469 | |
| 470 | kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL); |
| 471 | if (!kbuf) |
| 472 | goto out_vn_rele; |
| 473 | |
| 474 | cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; |
| 475 | VOP_ATTR_LIST(vp, kbuf, al_hreq.buflen, al_hreq.flags, |
| 476 | cursor, NULL, error); |
| 477 | if (error) |
| 478 | goto out_kfree; |
| 479 | |
| 480 | if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) |
| 481 | error = -EFAULT; |
| 482 | |
| 483 | out_kfree: |
| 484 | kfree(kbuf); |
| 485 | out_vn_rele: |
| 486 | VN_RELE(vp); |
| 487 | out: |
| 488 | return -error; |
| 489 | } |
| 490 | |
| 491 | STATIC int |
| 492 | xfs_attrmulti_attr_get( |
| 493 | struct vnode *vp, |
| 494 | char *name, |
| 495 | char __user *ubuf, |
| 496 | __uint32_t *len, |
| 497 | __uint32_t flags) |
| 498 | { |
| 499 | char *kbuf; |
| 500 | int error = EFAULT; |
| 501 | |
| 502 | if (*len > XATTR_SIZE_MAX) |
| 503 | return EINVAL; |
| 504 | kbuf = kmalloc(*len, GFP_KERNEL); |
| 505 | if (!kbuf) |
| 506 | return ENOMEM; |
| 507 | |
| 508 | VOP_ATTR_GET(vp, name, kbuf, len, flags, NULL, error); |
| 509 | if (error) |
| 510 | goto out_kfree; |
| 511 | |
| 512 | if (copy_to_user(ubuf, kbuf, *len)) |
| 513 | error = EFAULT; |
| 514 | |
| 515 | out_kfree: |
| 516 | kfree(kbuf); |
| 517 | return error; |
| 518 | } |
| 519 | |
| 520 | STATIC int |
| 521 | xfs_attrmulti_attr_set( |
| 522 | struct vnode *vp, |
| 523 | char *name, |
| 524 | const char __user *ubuf, |
| 525 | __uint32_t len, |
| 526 | __uint32_t flags) |
| 527 | { |
| 528 | char *kbuf; |
| 529 | int error = EFAULT; |
| 530 | |
Christoph Hellwig | 3542c6e | 2006-01-09 20:52:00 -0800 | [diff] [blame] | 531 | if (IS_RDONLY(&vp->v_inode)) |
| 532 | return -EROFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode)) |
| 534 | return EPERM; |
| 535 | if (len > XATTR_SIZE_MAX) |
| 536 | return EINVAL; |
| 537 | |
| 538 | kbuf = kmalloc(len, GFP_KERNEL); |
| 539 | if (!kbuf) |
| 540 | return ENOMEM; |
| 541 | |
| 542 | if (copy_from_user(kbuf, ubuf, len)) |
| 543 | goto out_kfree; |
| 544 | |
| 545 | VOP_ATTR_SET(vp, name, kbuf, len, flags, NULL, error); |
| 546 | |
| 547 | out_kfree: |
| 548 | kfree(kbuf); |
| 549 | return error; |
| 550 | } |
| 551 | |
| 552 | STATIC int |
| 553 | xfs_attrmulti_attr_remove( |
| 554 | struct vnode *vp, |
| 555 | char *name, |
| 556 | __uint32_t flags) |
| 557 | { |
| 558 | int error; |
| 559 | |
Christoph Hellwig | 3542c6e | 2006-01-09 20:52:00 -0800 | [diff] [blame] | 560 | |
| 561 | if (IS_RDONLY(&vp->v_inode)) |
| 562 | return -EROFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode)) |
| 564 | return EPERM; |
| 565 | |
| 566 | VOP_ATTR_REMOVE(vp, name, flags, NULL, error); |
| 567 | return error; |
| 568 | } |
| 569 | |
| 570 | STATIC int |
| 571 | xfs_attrmulti_by_handle( |
| 572 | xfs_mount_t *mp, |
| 573 | void __user *arg, |
| 574 | struct file *parfilp, |
| 575 | struct inode *parinode) |
| 576 | { |
| 577 | int error; |
| 578 | xfs_attr_multiop_t *ops; |
| 579 | xfs_fsop_attrmulti_handlereq_t am_hreq; |
| 580 | struct inode *inode; |
| 581 | vnode_t *vp; |
| 582 | unsigned int i, size; |
| 583 | char *attr_name; |
| 584 | |
| 585 | if (!capable(CAP_SYS_ADMIN)) |
| 586 | return -XFS_ERROR(EPERM); |
| 587 | if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) |
| 588 | return -XFS_ERROR(EFAULT); |
| 589 | |
| 590 | error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &vp, &inode); |
| 591 | if (error) |
| 592 | goto out; |
| 593 | |
| 594 | error = E2BIG; |
| 595 | size = am_hreq.opcount * sizeof(attr_multiop_t); |
| 596 | if (!size || size > 16 * PAGE_SIZE) |
| 597 | goto out_vn_rele; |
| 598 | |
| 599 | error = ENOMEM; |
| 600 | ops = kmalloc(size, GFP_KERNEL); |
| 601 | if (!ops) |
| 602 | goto out_vn_rele; |
| 603 | |
| 604 | error = EFAULT; |
| 605 | if (copy_from_user(ops, am_hreq.ops, size)) |
| 606 | goto out_kfree_ops; |
| 607 | |
| 608 | attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); |
| 609 | if (!attr_name) |
| 610 | goto out_kfree_ops; |
| 611 | |
| 612 | |
| 613 | error = 0; |
| 614 | for (i = 0; i < am_hreq.opcount; i++) { |
| 615 | ops[i].am_error = strncpy_from_user(attr_name, |
| 616 | ops[i].am_attrname, MAXNAMELEN); |
| 617 | if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) |
| 618 | error = -ERANGE; |
| 619 | if (ops[i].am_error < 0) |
| 620 | break; |
| 621 | |
| 622 | switch (ops[i].am_opcode) { |
| 623 | case ATTR_OP_GET: |
| 624 | ops[i].am_error = xfs_attrmulti_attr_get(vp, |
| 625 | attr_name, ops[i].am_attrvalue, |
| 626 | &ops[i].am_length, ops[i].am_flags); |
| 627 | break; |
| 628 | case ATTR_OP_SET: |
| 629 | ops[i].am_error = xfs_attrmulti_attr_set(vp, |
| 630 | attr_name, ops[i].am_attrvalue, |
| 631 | ops[i].am_length, ops[i].am_flags); |
| 632 | break; |
| 633 | case ATTR_OP_REMOVE: |
| 634 | ops[i].am_error = xfs_attrmulti_attr_remove(vp, |
| 635 | attr_name, ops[i].am_flags); |
| 636 | break; |
| 637 | default: |
| 638 | ops[i].am_error = EINVAL; |
| 639 | } |
| 640 | } |
| 641 | |
| 642 | if (copy_to_user(am_hreq.ops, ops, size)) |
| 643 | error = XFS_ERROR(EFAULT); |
| 644 | |
| 645 | kfree(attr_name); |
| 646 | out_kfree_ops: |
| 647 | kfree(ops); |
| 648 | out_vn_rele: |
| 649 | VN_RELE(vp); |
| 650 | out: |
| 651 | return -error; |
| 652 | } |
| 653 | |
| 654 | /* prototypes for a few of the stack-hungry cases that have |
| 655 | * their own functions. Functions are defined after their use |
| 656 | * so gcc doesn't get fancy and inline them with -03 */ |
| 657 | |
| 658 | STATIC int |
| 659 | xfs_ioc_space( |
| 660 | bhv_desc_t *bdp, |
| 661 | vnode_t *vp, |
| 662 | struct file *filp, |
| 663 | int flags, |
| 664 | unsigned int cmd, |
| 665 | void __user *arg); |
| 666 | |
| 667 | STATIC int |
| 668 | xfs_ioc_bulkstat( |
| 669 | xfs_mount_t *mp, |
| 670 | unsigned int cmd, |
| 671 | void __user *arg); |
| 672 | |
| 673 | STATIC int |
| 674 | xfs_ioc_fsgeometry_v1( |
| 675 | xfs_mount_t *mp, |
| 676 | void __user *arg); |
| 677 | |
| 678 | STATIC int |
| 679 | xfs_ioc_fsgeometry( |
| 680 | xfs_mount_t *mp, |
| 681 | void __user *arg); |
| 682 | |
| 683 | STATIC int |
| 684 | xfs_ioc_xattr( |
| 685 | vnode_t *vp, |
| 686 | xfs_inode_t *ip, |
| 687 | struct file *filp, |
| 688 | unsigned int cmd, |
| 689 | void __user *arg); |
| 690 | |
| 691 | STATIC int |
| 692 | xfs_ioc_getbmap( |
| 693 | bhv_desc_t *bdp, |
| 694 | struct file *filp, |
| 695 | int flags, |
| 696 | unsigned int cmd, |
| 697 | void __user *arg); |
| 698 | |
| 699 | STATIC int |
| 700 | xfs_ioc_getbmapx( |
| 701 | bhv_desc_t *bdp, |
| 702 | void __user *arg); |
| 703 | |
| 704 | int |
| 705 | xfs_ioctl( |
| 706 | bhv_desc_t *bdp, |
| 707 | struct inode *inode, |
| 708 | struct file *filp, |
| 709 | int ioflags, |
| 710 | unsigned int cmd, |
| 711 | void __user *arg) |
| 712 | { |
| 713 | int error; |
| 714 | vnode_t *vp; |
| 715 | xfs_inode_t *ip; |
| 716 | xfs_mount_t *mp; |
| 717 | |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 718 | vp = vn_from_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | |
| 720 | vn_trace_entry(vp, "xfs_ioctl", (inst_t *)__return_address); |
| 721 | |
| 722 | ip = XFS_BHVTOI(bdp); |
| 723 | mp = ip->i_mount; |
| 724 | |
| 725 | switch (cmd) { |
| 726 | |
| 727 | case XFS_IOC_ALLOCSP: |
| 728 | case XFS_IOC_FREESP: |
| 729 | case XFS_IOC_RESVSP: |
| 730 | case XFS_IOC_UNRESVSP: |
| 731 | case XFS_IOC_ALLOCSP64: |
| 732 | case XFS_IOC_FREESP64: |
| 733 | case XFS_IOC_RESVSP64: |
| 734 | case XFS_IOC_UNRESVSP64: |
| 735 | /* |
| 736 | * Only allow the sys admin to reserve space unless |
| 737 | * unwritten extents are enabled. |
| 738 | */ |
| 739 | if (!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) && |
| 740 | !capable(CAP_SYS_ADMIN)) |
| 741 | return -EPERM; |
| 742 | |
| 743 | return xfs_ioc_space(bdp, vp, filp, ioflags, cmd, arg); |
| 744 | |
| 745 | case XFS_IOC_DIOINFO: { |
| 746 | struct dioattr da; |
| 747 | xfs_buftarg_t *target = |
| 748 | (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ? |
| 749 | mp->m_rtdev_targp : mp->m_ddev_targp; |
| 750 | |
Nathan Scott | ce8e922 | 2006-01-11 15:39:08 +1100 | [diff] [blame] | 751 | da.d_mem = da.d_miniosz = 1 << target->bt_sshift; |
Nathan Scott | 0d14824 | 2006-01-11 15:33:51 +1100 | [diff] [blame] | 752 | da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | |
| 754 | if (copy_to_user(arg, &da, sizeof(da))) |
| 755 | return -XFS_ERROR(EFAULT); |
| 756 | return 0; |
| 757 | } |
| 758 | |
| 759 | case XFS_IOC_FSBULKSTAT_SINGLE: |
| 760 | case XFS_IOC_FSBULKSTAT: |
| 761 | case XFS_IOC_FSINUMBERS: |
| 762 | return xfs_ioc_bulkstat(mp, cmd, arg); |
| 763 | |
| 764 | case XFS_IOC_FSGEOMETRY_V1: |
| 765 | return xfs_ioc_fsgeometry_v1(mp, arg); |
| 766 | |
| 767 | case XFS_IOC_FSGEOMETRY: |
| 768 | return xfs_ioc_fsgeometry(mp, arg); |
| 769 | |
| 770 | case XFS_IOC_GETVERSION: |
| 771 | case XFS_IOC_GETXFLAGS: |
| 772 | case XFS_IOC_SETXFLAGS: |
| 773 | case XFS_IOC_FSGETXATTR: |
| 774 | case XFS_IOC_FSSETXATTR: |
| 775 | case XFS_IOC_FSGETXATTRA: |
| 776 | return xfs_ioc_xattr(vp, ip, filp, cmd, arg); |
| 777 | |
| 778 | case XFS_IOC_FSSETDM: { |
| 779 | struct fsdmidata dmi; |
| 780 | |
| 781 | if (copy_from_user(&dmi, arg, sizeof(dmi))) |
| 782 | return -XFS_ERROR(EFAULT); |
| 783 | |
| 784 | error = xfs_set_dmattrs(bdp, dmi.fsd_dmevmask, dmi.fsd_dmstate, |
| 785 | NULL); |
| 786 | return -error; |
| 787 | } |
| 788 | |
| 789 | case XFS_IOC_GETBMAP: |
| 790 | case XFS_IOC_GETBMAPA: |
| 791 | return xfs_ioc_getbmap(bdp, filp, ioflags, cmd, arg); |
| 792 | |
| 793 | case XFS_IOC_GETBMAPX: |
| 794 | return xfs_ioc_getbmapx(bdp, arg); |
| 795 | |
| 796 | case XFS_IOC_FD_TO_HANDLE: |
| 797 | case XFS_IOC_PATH_TO_HANDLE: |
| 798 | case XFS_IOC_PATH_TO_FSHANDLE: |
| 799 | return xfs_find_handle(cmd, arg); |
| 800 | |
| 801 | case XFS_IOC_OPEN_BY_HANDLE: |
| 802 | return xfs_open_by_handle(mp, arg, filp, inode); |
| 803 | |
| 804 | case XFS_IOC_FSSETDM_BY_HANDLE: |
| 805 | return xfs_fssetdm_by_handle(mp, arg, filp, inode); |
| 806 | |
| 807 | case XFS_IOC_READLINK_BY_HANDLE: |
| 808 | return xfs_readlink_by_handle(mp, arg, filp, inode); |
| 809 | |
| 810 | case XFS_IOC_ATTRLIST_BY_HANDLE: |
| 811 | return xfs_attrlist_by_handle(mp, arg, filp, inode); |
| 812 | |
| 813 | case XFS_IOC_ATTRMULTI_BY_HANDLE: |
| 814 | return xfs_attrmulti_by_handle(mp, arg, filp, inode); |
| 815 | |
| 816 | case XFS_IOC_SWAPEXT: { |
| 817 | error = xfs_swapext((struct xfs_swapext __user *)arg); |
| 818 | return -error; |
| 819 | } |
| 820 | |
| 821 | case XFS_IOC_FSCOUNTS: { |
| 822 | xfs_fsop_counts_t out; |
| 823 | |
| 824 | error = xfs_fs_counts(mp, &out); |
| 825 | if (error) |
| 826 | return -error; |
| 827 | |
| 828 | if (copy_to_user(arg, &out, sizeof(out))) |
| 829 | return -XFS_ERROR(EFAULT); |
| 830 | return 0; |
| 831 | } |
| 832 | |
| 833 | case XFS_IOC_SET_RESBLKS: { |
| 834 | xfs_fsop_resblks_t inout; |
| 835 | __uint64_t in; |
| 836 | |
| 837 | if (!capable(CAP_SYS_ADMIN)) |
| 838 | return -EPERM; |
| 839 | |
| 840 | if (copy_from_user(&inout, arg, sizeof(inout))) |
| 841 | return -XFS_ERROR(EFAULT); |
| 842 | |
| 843 | /* input parameter is passed in resblks field of structure */ |
| 844 | in = inout.resblks; |
| 845 | error = xfs_reserve_blocks(mp, &in, &inout); |
| 846 | if (error) |
| 847 | return -error; |
| 848 | |
| 849 | if (copy_to_user(arg, &inout, sizeof(inout))) |
| 850 | return -XFS_ERROR(EFAULT); |
| 851 | return 0; |
| 852 | } |
| 853 | |
| 854 | case XFS_IOC_GET_RESBLKS: { |
| 855 | xfs_fsop_resblks_t out; |
| 856 | |
| 857 | if (!capable(CAP_SYS_ADMIN)) |
| 858 | return -EPERM; |
| 859 | |
| 860 | error = xfs_reserve_blocks(mp, NULL, &out); |
| 861 | if (error) |
| 862 | return -error; |
| 863 | |
| 864 | if (copy_to_user(arg, &out, sizeof(out))) |
| 865 | return -XFS_ERROR(EFAULT); |
| 866 | |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | case XFS_IOC_FSGROWFSDATA: { |
| 871 | xfs_growfs_data_t in; |
| 872 | |
| 873 | if (!capable(CAP_SYS_ADMIN)) |
| 874 | return -EPERM; |
| 875 | |
| 876 | if (copy_from_user(&in, arg, sizeof(in))) |
| 877 | return -XFS_ERROR(EFAULT); |
| 878 | |
| 879 | error = xfs_growfs_data(mp, &in); |
| 880 | return -error; |
| 881 | } |
| 882 | |
| 883 | case XFS_IOC_FSGROWFSLOG: { |
| 884 | xfs_growfs_log_t in; |
| 885 | |
| 886 | if (!capable(CAP_SYS_ADMIN)) |
| 887 | return -EPERM; |
| 888 | |
| 889 | if (copy_from_user(&in, arg, sizeof(in))) |
| 890 | return -XFS_ERROR(EFAULT); |
| 891 | |
| 892 | error = xfs_growfs_log(mp, &in); |
| 893 | return -error; |
| 894 | } |
| 895 | |
| 896 | case XFS_IOC_FSGROWFSRT: { |
| 897 | xfs_growfs_rt_t in; |
| 898 | |
| 899 | if (!capable(CAP_SYS_ADMIN)) |
| 900 | return -EPERM; |
| 901 | |
| 902 | if (copy_from_user(&in, arg, sizeof(in))) |
| 903 | return -XFS_ERROR(EFAULT); |
| 904 | |
| 905 | error = xfs_growfs_rt(mp, &in); |
| 906 | return -error; |
| 907 | } |
| 908 | |
| 909 | case XFS_IOC_FREEZE: |
| 910 | if (!capable(CAP_SYS_ADMIN)) |
| 911 | return -EPERM; |
| 912 | |
| 913 | if (inode->i_sb->s_frozen == SB_UNFROZEN) |
| 914 | freeze_bdev(inode->i_sb->s_bdev); |
| 915 | return 0; |
| 916 | |
| 917 | case XFS_IOC_THAW: |
| 918 | if (!capable(CAP_SYS_ADMIN)) |
| 919 | return -EPERM; |
| 920 | if (inode->i_sb->s_frozen != SB_UNFROZEN) |
| 921 | thaw_bdev(inode->i_sb->s_bdev, inode->i_sb); |
| 922 | return 0; |
| 923 | |
| 924 | case XFS_IOC_GOINGDOWN: { |
| 925 | __uint32_t in; |
| 926 | |
| 927 | if (!capable(CAP_SYS_ADMIN)) |
| 928 | return -EPERM; |
| 929 | |
| 930 | if (get_user(in, (__uint32_t __user *)arg)) |
| 931 | return -XFS_ERROR(EFAULT); |
| 932 | |
| 933 | error = xfs_fs_goingdown(mp, in); |
| 934 | return -error; |
| 935 | } |
| 936 | |
| 937 | case XFS_IOC_ERROR_INJECTION: { |
| 938 | xfs_error_injection_t in; |
| 939 | |
| 940 | if (!capable(CAP_SYS_ADMIN)) |
| 941 | return -EPERM; |
| 942 | |
| 943 | if (copy_from_user(&in, arg, sizeof(in))) |
| 944 | return -XFS_ERROR(EFAULT); |
| 945 | |
| 946 | error = xfs_errortag_add(in.errtag, mp); |
| 947 | return -error; |
| 948 | } |
| 949 | |
| 950 | case XFS_IOC_ERROR_CLEARALL: |
| 951 | if (!capable(CAP_SYS_ADMIN)) |
| 952 | return -EPERM; |
| 953 | |
| 954 | error = xfs_errortag_clearall(mp); |
| 955 | return -error; |
| 956 | |
| 957 | default: |
| 958 | return -ENOTTY; |
| 959 | } |
| 960 | } |
| 961 | |
| 962 | STATIC int |
| 963 | xfs_ioc_space( |
| 964 | bhv_desc_t *bdp, |
| 965 | vnode_t *vp, |
| 966 | struct file *filp, |
| 967 | int ioflags, |
| 968 | unsigned int cmd, |
| 969 | void __user *arg) |
| 970 | { |
| 971 | xfs_flock64_t bf; |
| 972 | int attr_flags = 0; |
| 973 | int error; |
| 974 | |
| 975 | if (vp->v_inode.i_flags & (S_IMMUTABLE|S_APPEND)) |
| 976 | return -XFS_ERROR(EPERM); |
| 977 | |
Eric Sandeen | ad4a8ac | 2005-09-02 16:41:16 +1000 | [diff] [blame] | 978 | if (!(filp->f_mode & FMODE_WRITE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | return -XFS_ERROR(EBADF); |
| 980 | |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 981 | if (!VN_ISREG(vp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | return -XFS_ERROR(EINVAL); |
| 983 | |
| 984 | if (copy_from_user(&bf, arg, sizeof(bf))) |
| 985 | return -XFS_ERROR(EFAULT); |
| 986 | |
| 987 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| 988 | attr_flags |= ATTR_NONBLOCK; |
| 989 | if (ioflags & IO_INVIS) |
| 990 | attr_flags |= ATTR_DMI; |
| 991 | |
| 992 | error = xfs_change_file_space(bdp, cmd, &bf, filp->f_pos, |
| 993 | NULL, attr_flags); |
| 994 | return -error; |
| 995 | } |
| 996 | |
| 997 | STATIC int |
| 998 | xfs_ioc_bulkstat( |
| 999 | xfs_mount_t *mp, |
| 1000 | unsigned int cmd, |
| 1001 | void __user *arg) |
| 1002 | { |
| 1003 | xfs_fsop_bulkreq_t bulkreq; |
| 1004 | int count; /* # of records returned */ |
| 1005 | xfs_ino_t inlast; /* last inode number */ |
| 1006 | int done; |
| 1007 | int error; |
| 1008 | |
| 1009 | /* done = 1 if there are more stats to get and if bulkstat */ |
| 1010 | /* should be called again (unused here, but used in dmapi) */ |
| 1011 | |
| 1012 | if (!capable(CAP_SYS_ADMIN)) |
| 1013 | return -EPERM; |
| 1014 | |
| 1015 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1016 | return -XFS_ERROR(EIO); |
| 1017 | |
| 1018 | if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) |
| 1019 | return -XFS_ERROR(EFAULT); |
| 1020 | |
| 1021 | if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) |
| 1022 | return -XFS_ERROR(EFAULT); |
| 1023 | |
| 1024 | if ((count = bulkreq.icount) <= 0) |
| 1025 | return -XFS_ERROR(EINVAL); |
| 1026 | |
| 1027 | if (cmd == XFS_IOC_FSINUMBERS) |
| 1028 | error = xfs_inumbers(mp, &inlast, &count, |
| 1029 | bulkreq.ubuffer); |
| 1030 | else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) |
| 1031 | error = xfs_bulkstat_single(mp, &inlast, |
| 1032 | bulkreq.ubuffer, &done); |
| 1033 | else { /* XFS_IOC_FSBULKSTAT */ |
| 1034 | if (count == 1 && inlast != 0) { |
| 1035 | inlast++; |
| 1036 | error = xfs_bulkstat_single(mp, &inlast, |
| 1037 | bulkreq.ubuffer, &done); |
| 1038 | } else { |
| 1039 | error = xfs_bulkstat(mp, &inlast, &count, |
| 1040 | (bulkstat_one_pf)xfs_bulkstat_one, NULL, |
| 1041 | sizeof(xfs_bstat_t), bulkreq.ubuffer, |
| 1042 | BULKSTAT_FG_QUICK, &done); |
| 1043 | } |
| 1044 | } |
| 1045 | |
| 1046 | if (error) |
| 1047 | return -error; |
| 1048 | |
| 1049 | if (bulkreq.ocount != NULL) { |
| 1050 | if (copy_to_user(bulkreq.lastip, &inlast, |
| 1051 | sizeof(xfs_ino_t))) |
| 1052 | return -XFS_ERROR(EFAULT); |
| 1053 | |
| 1054 | if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) |
| 1055 | return -XFS_ERROR(EFAULT); |
| 1056 | } |
| 1057 | |
| 1058 | return 0; |
| 1059 | } |
| 1060 | |
| 1061 | STATIC int |
| 1062 | xfs_ioc_fsgeometry_v1( |
| 1063 | xfs_mount_t *mp, |
| 1064 | void __user *arg) |
| 1065 | { |
| 1066 | xfs_fsop_geom_v1_t fsgeo; |
| 1067 | int error; |
| 1068 | |
| 1069 | error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3); |
| 1070 | if (error) |
| 1071 | return -error; |
| 1072 | |
| 1073 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) |
| 1074 | return -XFS_ERROR(EFAULT); |
| 1075 | return 0; |
| 1076 | } |
| 1077 | |
| 1078 | STATIC int |
| 1079 | xfs_ioc_fsgeometry( |
| 1080 | xfs_mount_t *mp, |
| 1081 | void __user *arg) |
| 1082 | { |
| 1083 | xfs_fsop_geom_t fsgeo; |
| 1084 | int error; |
| 1085 | |
| 1086 | error = xfs_fs_geometry(mp, &fsgeo, 4); |
| 1087 | if (error) |
| 1088 | return -error; |
| 1089 | |
| 1090 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) |
| 1091 | return -XFS_ERROR(EFAULT); |
| 1092 | return 0; |
| 1093 | } |
| 1094 | |
| 1095 | /* |
| 1096 | * Linux extended inode flags interface. |
| 1097 | */ |
| 1098 | #define LINUX_XFLAG_SYNC 0x00000008 /* Synchronous updates */ |
| 1099 | #define LINUX_XFLAG_IMMUTABLE 0x00000010 /* Immutable file */ |
| 1100 | #define LINUX_XFLAG_APPEND 0x00000020 /* writes to file may only append */ |
| 1101 | #define LINUX_XFLAG_NODUMP 0x00000040 /* do not dump file */ |
| 1102 | #define LINUX_XFLAG_NOATIME 0x00000080 /* do not update atime */ |
| 1103 | |
| 1104 | STATIC unsigned int |
| 1105 | xfs_merge_ioc_xflags( |
| 1106 | unsigned int flags, |
| 1107 | unsigned int start) |
| 1108 | { |
| 1109 | unsigned int xflags = start; |
| 1110 | |
| 1111 | if (flags & LINUX_XFLAG_IMMUTABLE) |
| 1112 | xflags |= XFS_XFLAG_IMMUTABLE; |
| 1113 | else |
| 1114 | xflags &= ~XFS_XFLAG_IMMUTABLE; |
| 1115 | if (flags & LINUX_XFLAG_APPEND) |
| 1116 | xflags |= XFS_XFLAG_APPEND; |
| 1117 | else |
| 1118 | xflags &= ~XFS_XFLAG_APPEND; |
| 1119 | if (flags & LINUX_XFLAG_SYNC) |
| 1120 | xflags |= XFS_XFLAG_SYNC; |
| 1121 | else |
| 1122 | xflags &= ~XFS_XFLAG_SYNC; |
| 1123 | if (flags & LINUX_XFLAG_NOATIME) |
| 1124 | xflags |= XFS_XFLAG_NOATIME; |
| 1125 | else |
| 1126 | xflags &= ~XFS_XFLAG_NOATIME; |
| 1127 | if (flags & LINUX_XFLAG_NODUMP) |
| 1128 | xflags |= XFS_XFLAG_NODUMP; |
| 1129 | else |
| 1130 | xflags &= ~XFS_XFLAG_NODUMP; |
| 1131 | |
| 1132 | return xflags; |
| 1133 | } |
| 1134 | |
| 1135 | STATIC unsigned int |
| 1136 | xfs_di2lxflags( |
| 1137 | __uint16_t di_flags) |
| 1138 | { |
| 1139 | unsigned int flags = 0; |
| 1140 | |
| 1141 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
| 1142 | flags |= LINUX_XFLAG_IMMUTABLE; |
| 1143 | if (di_flags & XFS_DIFLAG_APPEND) |
| 1144 | flags |= LINUX_XFLAG_APPEND; |
| 1145 | if (di_flags & XFS_DIFLAG_SYNC) |
| 1146 | flags |= LINUX_XFLAG_SYNC; |
| 1147 | if (di_flags & XFS_DIFLAG_NOATIME) |
| 1148 | flags |= LINUX_XFLAG_NOATIME; |
| 1149 | if (di_flags & XFS_DIFLAG_NODUMP) |
| 1150 | flags |= LINUX_XFLAG_NODUMP; |
| 1151 | return flags; |
| 1152 | } |
| 1153 | |
| 1154 | STATIC int |
| 1155 | xfs_ioc_xattr( |
| 1156 | vnode_t *vp, |
| 1157 | xfs_inode_t *ip, |
| 1158 | struct file *filp, |
| 1159 | unsigned int cmd, |
| 1160 | void __user *arg) |
| 1161 | { |
| 1162 | struct fsxattr fa; |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1163 | struct vattr *vattr; |
| 1164 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | int attr_flags; |
| 1166 | unsigned int flags; |
| 1167 | |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1168 | vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
| 1169 | if (unlikely(!vattr)) |
| 1170 | return -ENOMEM; |
| 1171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | switch (cmd) { |
| 1173 | case XFS_IOC_FSGETXATTR: { |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1174 | vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \ |
| 1175 | XFS_AT_NEXTENTS | XFS_AT_PROJID; |
| 1176 | VOP_GETATTR(vp, vattr, 0, NULL, error); |
| 1177 | if (unlikely(error)) { |
| 1178 | error = -error; |
| 1179 | break; |
| 1180 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1182 | fa.fsx_xflags = vattr->va_xflags; |
| 1183 | fa.fsx_extsize = vattr->va_extsize; |
| 1184 | fa.fsx_nextents = vattr->va_nextents; |
| 1185 | fa.fsx_projid = vattr->va_projid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1187 | if (copy_to_user(arg, &fa, sizeof(fa))) { |
| 1188 | error = -EFAULT; |
| 1189 | break; |
| 1190 | } |
| 1191 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | } |
| 1193 | |
| 1194 | case XFS_IOC_FSSETXATTR: { |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1195 | if (copy_from_user(&fa, arg, sizeof(fa))) { |
| 1196 | error = -EFAULT; |
| 1197 | break; |
| 1198 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | |
| 1200 | attr_flags = 0; |
| 1201 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| 1202 | attr_flags |= ATTR_NONBLOCK; |
| 1203 | |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1204 | vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | XFS_AT_PROJID; |
| 1205 | vattr->va_xflags = fa.fsx_xflags; |
| 1206 | vattr->va_extsize = fa.fsx_extsize; |
| 1207 | vattr->va_projid = fa.fsx_projid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1209 | VOP_SETATTR(vp, vattr, attr_flags, NULL, error); |
| 1210 | if (likely(!error)) |
| 1211 | __vn_revalidate(vp, vattr); /* update flags */ |
| 1212 | error = -error; |
| 1213 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | } |
| 1215 | |
| 1216 | case XFS_IOC_FSGETXATTRA: { |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1217 | vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \ |
| 1218 | XFS_AT_ANEXTENTS | XFS_AT_PROJID; |
| 1219 | VOP_GETATTR(vp, vattr, 0, NULL, error); |
| 1220 | if (unlikely(error)) { |
| 1221 | error = -error; |
| 1222 | break; |
| 1223 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1225 | fa.fsx_xflags = vattr->va_xflags; |
| 1226 | fa.fsx_extsize = vattr->va_extsize; |
| 1227 | fa.fsx_nextents = vattr->va_anextents; |
| 1228 | fa.fsx_projid = vattr->va_projid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1230 | if (copy_to_user(arg, &fa, sizeof(fa))) { |
| 1231 | error = -EFAULT; |
| 1232 | break; |
| 1233 | } |
| 1234 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | } |
| 1236 | |
| 1237 | case XFS_IOC_GETXFLAGS: { |
| 1238 | flags = xfs_di2lxflags(ip->i_d.di_flags); |
| 1239 | if (copy_to_user(arg, &flags, sizeof(flags))) |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1240 | error = -EFAULT; |
| 1241 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | } |
| 1243 | |
| 1244 | case XFS_IOC_SETXFLAGS: { |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1245 | if (copy_from_user(&flags, arg, sizeof(flags))) { |
| 1246 | error = -EFAULT; |
| 1247 | break; |
| 1248 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | |
| 1250 | if (flags & ~(LINUX_XFLAG_IMMUTABLE | LINUX_XFLAG_APPEND | \ |
| 1251 | LINUX_XFLAG_NOATIME | LINUX_XFLAG_NODUMP | \ |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1252 | LINUX_XFLAG_SYNC)) { |
| 1253 | error = -EOPNOTSUPP; |
| 1254 | break; |
| 1255 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | |
| 1257 | attr_flags = 0; |
| 1258 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| 1259 | attr_flags |= ATTR_NONBLOCK; |
| 1260 | |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1261 | vattr->va_mask = XFS_AT_XFLAGS; |
| 1262 | vattr->va_xflags = xfs_merge_ioc_xflags(flags, |
| 1263 | xfs_ip2xflags(ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1265 | VOP_SETATTR(vp, vattr, attr_flags, NULL, error); |
| 1266 | if (likely(!error)) |
| 1267 | __vn_revalidate(vp, vattr); /* update flags */ |
| 1268 | error = -error; |
| 1269 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | } |
| 1271 | |
| 1272 | case XFS_IOC_GETVERSION: { |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 1273 | flags = vn_to_inode(vp)->i_generation; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | if (copy_to_user(arg, &flags, sizeof(flags))) |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1275 | error = -EFAULT; |
| 1276 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | } |
| 1278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | default: |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1280 | error = -ENOTTY; |
| 1281 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | } |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 1283 | |
| 1284 | kfree(vattr); |
| 1285 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | } |
| 1287 | |
| 1288 | STATIC int |
| 1289 | xfs_ioc_getbmap( |
| 1290 | bhv_desc_t *bdp, |
| 1291 | struct file *filp, |
| 1292 | int ioflags, |
| 1293 | unsigned int cmd, |
| 1294 | void __user *arg) |
| 1295 | { |
| 1296 | struct getbmap bm; |
| 1297 | int iflags; |
| 1298 | int error; |
| 1299 | |
| 1300 | if (copy_from_user(&bm, arg, sizeof(bm))) |
| 1301 | return -XFS_ERROR(EFAULT); |
| 1302 | |
| 1303 | if (bm.bmv_count < 2) |
| 1304 | return -XFS_ERROR(EINVAL); |
| 1305 | |
| 1306 | iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); |
| 1307 | if (ioflags & IO_INVIS) |
| 1308 | iflags |= BMV_IF_NO_DMAPI_READ; |
| 1309 | |
| 1310 | error = xfs_getbmap(bdp, &bm, (struct getbmap __user *)arg+1, iflags); |
| 1311 | if (error) |
| 1312 | return -error; |
| 1313 | |
| 1314 | if (copy_to_user(arg, &bm, sizeof(bm))) |
| 1315 | return -XFS_ERROR(EFAULT); |
| 1316 | return 0; |
| 1317 | } |
| 1318 | |
| 1319 | STATIC int |
| 1320 | xfs_ioc_getbmapx( |
| 1321 | bhv_desc_t *bdp, |
| 1322 | void __user *arg) |
| 1323 | { |
| 1324 | struct getbmapx bmx; |
| 1325 | struct getbmap bm; |
| 1326 | int iflags; |
| 1327 | int error; |
| 1328 | |
| 1329 | if (copy_from_user(&bmx, arg, sizeof(bmx))) |
| 1330 | return -XFS_ERROR(EFAULT); |
| 1331 | |
| 1332 | if (bmx.bmv_count < 2) |
| 1333 | return -XFS_ERROR(EINVAL); |
| 1334 | |
| 1335 | /* |
| 1336 | * Map input getbmapx structure to a getbmap |
| 1337 | * structure for xfs_getbmap. |
| 1338 | */ |
| 1339 | GETBMAP_CONVERT(bmx, bm); |
| 1340 | |
| 1341 | iflags = bmx.bmv_iflags; |
| 1342 | |
| 1343 | if (iflags & (~BMV_IF_VALID)) |
| 1344 | return -XFS_ERROR(EINVAL); |
| 1345 | |
| 1346 | iflags |= BMV_IF_EXTENDED; |
| 1347 | |
| 1348 | error = xfs_getbmap(bdp, &bm, (struct getbmapx __user *)arg+1, iflags); |
| 1349 | if (error) |
| 1350 | return -error; |
| 1351 | |
| 1352 | GETBMAP_CONVERT(bm, bmx); |
| 1353 | |
| 1354 | if (copy_to_user(arg, &bmx, sizeof(bmx))) |
| 1355 | return -XFS_ERROR(EFAULT); |
| 1356 | |
| 1357 | return 0; |
| 1358 | } |