Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it is |
| 13 | * free of the rightful claim of any third person regarding infringement |
| 14 | * or the like. Any license provided herein, whether implied or |
| 15 | * otherwise, applies only to this software file. Patent licenses, if |
| 16 | * any, provided herein do not apply to combinations of this program with |
| 17 | * other software, or any other product whatsoever. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write the Free Software Foundation, Inc., 59 |
| 21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 22 | * |
| 23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, |
| 24 | * Mountain View, CA 94043, or: |
| 25 | * |
| 26 | * http://www.sgi.com |
| 27 | * |
| 28 | * For further information regarding this notice, see: |
| 29 | * |
| 30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ |
| 31 | */ |
| 32 | |
| 33 | #include "xfs.h" |
| 34 | |
| 35 | #include "xfs_fs.h" |
| 36 | #include "xfs_inum.h" |
| 37 | #include "xfs_log.h" |
| 38 | #include "xfs_trans.h" |
| 39 | #include "xfs_sb.h" |
| 40 | #include "xfs_dir.h" |
| 41 | #include "xfs_dir2.h" |
| 42 | #include "xfs_alloc.h" |
| 43 | #include "xfs_dmapi.h" |
| 44 | #include "xfs_mount.h" |
| 45 | #include "xfs_alloc_btree.h" |
| 46 | #include "xfs_bmap_btree.h" |
| 47 | #include "xfs_ialloc_btree.h" |
| 48 | #include "xfs_btree.h" |
| 49 | #include "xfs_ialloc.h" |
| 50 | #include "xfs_attr_sf.h" |
| 51 | #include "xfs_dir_sf.h" |
| 52 | #include "xfs_dir2_sf.h" |
| 53 | #include "xfs_dinode.h" |
| 54 | #include "xfs_inode.h" |
| 55 | #include "xfs_bmap.h" |
| 56 | #include "xfs_bit.h" |
| 57 | #include "xfs_rtalloc.h" |
| 58 | #include "xfs_error.h" |
| 59 | #include "xfs_itable.h" |
| 60 | #include "xfs_rw.h" |
| 61 | #include "xfs_acl.h" |
| 62 | #include "xfs_cap.h" |
| 63 | #include "xfs_mac.h" |
| 64 | #include "xfs_attr.h" |
| 65 | #include "xfs_buf_item.h" |
| 66 | #include "xfs_utils.h" |
| 67 | #include "xfs_dfrag.h" |
| 68 | #include "xfs_fsops.h" |
| 69 | |
| 70 | #include <linux/dcache.h> |
| 71 | #include <linux/mount.h> |
| 72 | #include <linux/namei.h> |
| 73 | #include <linux/pagemap.h> |
| 74 | |
| 75 | /* |
| 76 | * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to |
| 77 | * a file or fs handle. |
| 78 | * |
| 79 | * XFS_IOC_PATH_TO_FSHANDLE |
| 80 | * returns fs handle for a mount point or path within that mount point |
| 81 | * XFS_IOC_FD_TO_HANDLE |
| 82 | * returns full handle for a FD opened in user space |
| 83 | * XFS_IOC_PATH_TO_HANDLE |
| 84 | * returns full handle for a path |
| 85 | */ |
| 86 | STATIC int |
| 87 | xfs_find_handle( |
| 88 | unsigned int cmd, |
| 89 | void __user *arg) |
| 90 | { |
| 91 | int hsize; |
| 92 | xfs_handle_t handle; |
| 93 | xfs_fsop_handlereq_t hreq; |
| 94 | struct inode *inode; |
| 95 | struct vnode *vp; |
| 96 | |
| 97 | if (copy_from_user(&hreq, arg, sizeof(hreq))) |
| 98 | return -XFS_ERROR(EFAULT); |
| 99 | |
| 100 | memset((char *)&handle, 0, sizeof(handle)); |
| 101 | |
| 102 | switch (cmd) { |
| 103 | case XFS_IOC_PATH_TO_FSHANDLE: |
| 104 | case XFS_IOC_PATH_TO_HANDLE: { |
| 105 | struct nameidata nd; |
| 106 | int error; |
| 107 | |
| 108 | error = user_path_walk_link((const char __user *)hreq.path, &nd); |
| 109 | if (error) |
| 110 | return error; |
| 111 | |
| 112 | ASSERT(nd.dentry); |
| 113 | ASSERT(nd.dentry->d_inode); |
| 114 | inode = igrab(nd.dentry->d_inode); |
| 115 | path_release(&nd); |
| 116 | break; |
| 117 | } |
| 118 | |
| 119 | case XFS_IOC_FD_TO_HANDLE: { |
| 120 | struct file *file; |
| 121 | |
| 122 | file = fget(hreq.fd); |
| 123 | if (!file) |
| 124 | return -EBADF; |
| 125 | |
| 126 | ASSERT(file->f_dentry); |
| 127 | ASSERT(file->f_dentry->d_inode); |
| 128 | inode = igrab(file->f_dentry->d_inode); |
| 129 | fput(file); |
| 130 | break; |
| 131 | } |
| 132 | |
| 133 | default: |
| 134 | ASSERT(0); |
| 135 | return -XFS_ERROR(EINVAL); |
| 136 | } |
| 137 | |
| 138 | if (inode->i_sb->s_magic != XFS_SB_MAGIC) { |
| 139 | /* we're not in XFS anymore, Toto */ |
| 140 | iput(inode); |
| 141 | return -XFS_ERROR(EINVAL); |
| 142 | } |
| 143 | |
| 144 | /* we need the vnode */ |
| 145 | vp = LINVFS_GET_VP(inode); |
| 146 | if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { |
| 147 | iput(inode); |
| 148 | return -XFS_ERROR(EBADF); |
| 149 | } |
| 150 | |
| 151 | /* now we can grab the fsid */ |
| 152 | memcpy(&handle.ha_fsid, vp->v_vfsp->vfs_altfsid, sizeof(xfs_fsid_t)); |
| 153 | hsize = sizeof(xfs_fsid_t); |
| 154 | |
| 155 | if (cmd != XFS_IOC_PATH_TO_FSHANDLE) { |
| 156 | xfs_inode_t *ip; |
| 157 | bhv_desc_t *bhv; |
| 158 | int lock_mode; |
| 159 | |
| 160 | /* need to get access to the xfs_inode to read the generation */ |
| 161 | bhv = vn_bhv_lookup_unlocked(VN_BHV_HEAD(vp), &xfs_vnodeops); |
| 162 | ASSERT(bhv); |
| 163 | ip = XFS_BHVTOI(bhv); |
| 164 | ASSERT(ip); |
| 165 | lock_mode = xfs_ilock_map_shared(ip); |
| 166 | |
| 167 | /* fill in fid section of handle from inode */ |
| 168 | handle.ha_fid.xfs_fid_len = sizeof(xfs_fid_t) - |
| 169 | sizeof(handle.ha_fid.xfs_fid_len); |
| 170 | handle.ha_fid.xfs_fid_pad = 0; |
| 171 | handle.ha_fid.xfs_fid_gen = ip->i_d.di_gen; |
| 172 | handle.ha_fid.xfs_fid_ino = ip->i_ino; |
| 173 | |
| 174 | xfs_iunlock_map_shared(ip, lock_mode); |
| 175 | |
| 176 | hsize = XFS_HSIZE(handle); |
| 177 | } |
| 178 | |
| 179 | /* now copy our handle into the user buffer & write out the size */ |
| 180 | if (copy_to_user(hreq.ohandle, &handle, hsize) || |
| 181 | copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) { |
| 182 | iput(inode); |
| 183 | return -XFS_ERROR(EFAULT); |
| 184 | } |
| 185 | |
| 186 | iput(inode); |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | |
| 191 | /* |
| 192 | * Convert userspace handle data into vnode (and inode). |
| 193 | * We [ab]use the fact that all the fsop_handlereq ioctl calls |
| 194 | * have a data structure argument whose first component is always |
| 195 | * a xfs_fsop_handlereq_t, so we can cast to and from this type. |
| 196 | * This allows us to optimise the copy_from_user calls and gives |
| 197 | * a handy, shared routine. |
| 198 | * |
| 199 | * If no error, caller must always VN_RELE the returned vp. |
| 200 | */ |
| 201 | STATIC int |
| 202 | xfs_vget_fsop_handlereq( |
| 203 | xfs_mount_t *mp, |
| 204 | struct inode *parinode, /* parent inode pointer */ |
| 205 | xfs_fsop_handlereq_t *hreq, |
| 206 | vnode_t **vp, |
| 207 | struct inode **inode) |
| 208 | { |
| 209 | void __user *hanp; |
| 210 | size_t hlen; |
| 211 | xfs_fid_t *xfid; |
| 212 | xfs_handle_t *handlep; |
| 213 | xfs_handle_t handle; |
| 214 | xfs_inode_t *ip; |
| 215 | struct inode *inodep; |
| 216 | vnode_t *vpp; |
| 217 | xfs_ino_t ino; |
| 218 | __u32 igen; |
| 219 | int error; |
| 220 | |
| 221 | /* |
| 222 | * Only allow handle opens under a directory. |
| 223 | */ |
| 224 | if (!S_ISDIR(parinode->i_mode)) |
| 225 | return XFS_ERROR(ENOTDIR); |
| 226 | |
| 227 | hanp = hreq->ihandle; |
| 228 | hlen = hreq->ihandlen; |
| 229 | handlep = &handle; |
| 230 | |
| 231 | if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep)) |
| 232 | return XFS_ERROR(EINVAL); |
| 233 | if (copy_from_user(handlep, hanp, hlen)) |
| 234 | return XFS_ERROR(EFAULT); |
| 235 | if (hlen < sizeof(*handlep)) |
| 236 | memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen); |
| 237 | if (hlen > sizeof(handlep->ha_fsid)) { |
| 238 | if (handlep->ha_fid.xfs_fid_len != |
| 239 | (hlen - sizeof(handlep->ha_fsid) |
| 240 | - sizeof(handlep->ha_fid.xfs_fid_len)) |
| 241 | || handlep->ha_fid.xfs_fid_pad) |
| 242 | return XFS_ERROR(EINVAL); |
| 243 | } |
| 244 | |
| 245 | /* |
| 246 | * Crack the handle, obtain the inode # & generation # |
| 247 | */ |
| 248 | xfid = (struct xfs_fid *)&handlep->ha_fid; |
| 249 | if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) { |
| 250 | ino = xfid->xfs_fid_ino; |
| 251 | igen = xfid->xfs_fid_gen; |
| 252 | } else { |
| 253 | return XFS_ERROR(EINVAL); |
| 254 | } |
| 255 | |
| 256 | /* |
| 257 | * Get the XFS inode, building a vnode to go with it. |
| 258 | */ |
| 259 | error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0); |
| 260 | if (error) |
| 261 | return error; |
| 262 | if (ip == NULL) |
| 263 | return XFS_ERROR(EIO); |
| 264 | if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) { |
| 265 | xfs_iput_new(ip, XFS_ILOCK_SHARED); |
| 266 | return XFS_ERROR(ENOENT); |
| 267 | } |
| 268 | |
| 269 | vpp = XFS_ITOV(ip); |
| 270 | inodep = LINVFS_GET_IP(vpp); |
| 271 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 272 | |
| 273 | *vp = vpp; |
| 274 | *inode = inodep; |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | STATIC int |
| 279 | xfs_open_by_handle( |
| 280 | xfs_mount_t *mp, |
| 281 | void __user *arg, |
| 282 | struct file *parfilp, |
| 283 | struct inode *parinode) |
| 284 | { |
| 285 | int error; |
| 286 | int new_fd; |
| 287 | int permflag; |
| 288 | struct file *filp; |
| 289 | struct inode *inode; |
| 290 | struct dentry *dentry; |
| 291 | vnode_t *vp; |
| 292 | xfs_fsop_handlereq_t hreq; |
| 293 | |
| 294 | if (!capable(CAP_SYS_ADMIN)) |
| 295 | return -XFS_ERROR(EPERM); |
| 296 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 297 | return -XFS_ERROR(EFAULT); |
| 298 | |
| 299 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode); |
| 300 | if (error) |
| 301 | return -error; |
| 302 | |
| 303 | /* Restrict xfs_open_by_handle to directories & regular files. */ |
| 304 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { |
| 305 | iput(inode); |
| 306 | return -XFS_ERROR(EINVAL); |
| 307 | } |
| 308 | |
| 309 | #if BITS_PER_LONG != 32 |
| 310 | hreq.oflags |= O_LARGEFILE; |
| 311 | #endif |
| 312 | /* Put open permission in namei format. */ |
| 313 | permflag = hreq.oflags; |
| 314 | if ((permflag+1) & O_ACCMODE) |
| 315 | permflag++; |
| 316 | if (permflag & O_TRUNC) |
| 317 | permflag |= 2; |
| 318 | |
| 319 | if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && |
| 320 | (permflag & FMODE_WRITE) && IS_APPEND(inode)) { |
| 321 | iput(inode); |
| 322 | return -XFS_ERROR(EPERM); |
| 323 | } |
| 324 | |
| 325 | if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) { |
| 326 | iput(inode); |
| 327 | return -XFS_ERROR(EACCES); |
| 328 | } |
| 329 | |
| 330 | /* Can't write directories. */ |
| 331 | if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) { |
| 332 | iput(inode); |
| 333 | return -XFS_ERROR(EISDIR); |
| 334 | } |
| 335 | |
| 336 | if ((new_fd = get_unused_fd()) < 0) { |
| 337 | iput(inode); |
| 338 | return new_fd; |
| 339 | } |
| 340 | |
| 341 | dentry = d_alloc_anon(inode); |
| 342 | if (dentry == NULL) { |
| 343 | iput(inode); |
| 344 | put_unused_fd(new_fd); |
| 345 | return -XFS_ERROR(ENOMEM); |
| 346 | } |
| 347 | |
| 348 | /* Ensure umount returns EBUSY on umounts while this file is open. */ |
| 349 | mntget(parfilp->f_vfsmnt); |
| 350 | |
| 351 | /* Create file pointer. */ |
| 352 | filp = dentry_open(dentry, parfilp->f_vfsmnt, hreq.oflags); |
| 353 | if (IS_ERR(filp)) { |
| 354 | put_unused_fd(new_fd); |
| 355 | return -XFS_ERROR(-PTR_ERR(filp)); |
| 356 | } |
| 357 | if (inode->i_mode & S_IFREG) |
| 358 | filp->f_op = &linvfs_invis_file_operations; |
| 359 | |
| 360 | fd_install(new_fd, filp); |
| 361 | return new_fd; |
| 362 | } |
| 363 | |
| 364 | STATIC int |
| 365 | xfs_readlink_by_handle( |
| 366 | xfs_mount_t *mp, |
| 367 | void __user *arg, |
| 368 | struct file *parfilp, |
| 369 | struct inode *parinode) |
| 370 | { |
| 371 | int error; |
| 372 | struct iovec aiov; |
| 373 | struct uio auio; |
| 374 | struct inode *inode; |
| 375 | xfs_fsop_handlereq_t hreq; |
| 376 | vnode_t *vp; |
| 377 | __u32 olen; |
| 378 | |
| 379 | if (!capable(CAP_SYS_ADMIN)) |
| 380 | return -XFS_ERROR(EPERM); |
| 381 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 382 | return -XFS_ERROR(EFAULT); |
| 383 | |
| 384 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode); |
| 385 | if (error) |
| 386 | return -error; |
| 387 | |
| 388 | /* Restrict this handle operation to symlinks only. */ |
| 389 | if (vp->v_type != VLNK) { |
| 390 | VN_RELE(vp); |
| 391 | return -XFS_ERROR(EINVAL); |
| 392 | } |
| 393 | |
| 394 | if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) { |
| 395 | VN_RELE(vp); |
| 396 | return -XFS_ERROR(EFAULT); |
| 397 | } |
| 398 | aiov.iov_len = olen; |
| 399 | aiov.iov_base = hreq.ohandle; |
| 400 | |
| 401 | auio.uio_iov = &aiov; |
| 402 | auio.uio_iovcnt = 1; |
| 403 | auio.uio_offset = 0; |
| 404 | auio.uio_segflg = UIO_USERSPACE; |
| 405 | auio.uio_resid = olen; |
| 406 | |
| 407 | VOP_READLINK(vp, &auio, IO_INVIS, NULL, error); |
| 408 | |
| 409 | VN_RELE(vp); |
| 410 | return (olen - auio.uio_resid); |
| 411 | } |
| 412 | |
| 413 | STATIC int |
| 414 | xfs_fssetdm_by_handle( |
| 415 | xfs_mount_t *mp, |
| 416 | void __user *arg, |
| 417 | struct file *parfilp, |
| 418 | struct inode *parinode) |
| 419 | { |
| 420 | int error; |
| 421 | struct fsdmidata fsd; |
| 422 | xfs_fsop_setdm_handlereq_t dmhreq; |
| 423 | struct inode *inode; |
| 424 | bhv_desc_t *bdp; |
| 425 | vnode_t *vp; |
| 426 | |
| 427 | if (!capable(CAP_MKNOD)) |
| 428 | return -XFS_ERROR(EPERM); |
| 429 | if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) |
| 430 | return -XFS_ERROR(EFAULT); |
| 431 | |
| 432 | error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &vp, &inode); |
| 433 | if (error) |
| 434 | return -error; |
| 435 | |
| 436 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) { |
| 437 | VN_RELE(vp); |
| 438 | return -XFS_ERROR(EPERM); |
| 439 | } |
| 440 | |
| 441 | if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { |
| 442 | VN_RELE(vp); |
| 443 | return -XFS_ERROR(EFAULT); |
| 444 | } |
| 445 | |
| 446 | bdp = bhv_base_unlocked(VN_BHV_HEAD(vp)); |
| 447 | error = xfs_set_dmattrs(bdp, fsd.fsd_dmevmask, fsd.fsd_dmstate, NULL); |
| 448 | |
| 449 | VN_RELE(vp); |
| 450 | if (error) |
| 451 | return -error; |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | STATIC int |
| 456 | xfs_attrlist_by_handle( |
| 457 | xfs_mount_t *mp, |
| 458 | void __user *arg, |
| 459 | struct file *parfilp, |
| 460 | struct inode *parinode) |
| 461 | { |
| 462 | int error; |
| 463 | attrlist_cursor_kern_t *cursor; |
| 464 | xfs_fsop_attrlist_handlereq_t al_hreq; |
| 465 | struct inode *inode; |
| 466 | vnode_t *vp; |
| 467 | char *kbuf; |
| 468 | |
| 469 | if (!capable(CAP_SYS_ADMIN)) |
| 470 | return -XFS_ERROR(EPERM); |
| 471 | if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) |
| 472 | return -XFS_ERROR(EFAULT); |
| 473 | if (al_hreq.buflen > XATTR_LIST_MAX) |
| 474 | return -XFS_ERROR(EINVAL); |
| 475 | |
| 476 | error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq, |
| 477 | &vp, &inode); |
| 478 | if (error) |
| 479 | goto out; |
| 480 | |
| 481 | kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL); |
| 482 | if (!kbuf) |
| 483 | goto out_vn_rele; |
| 484 | |
| 485 | cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; |
| 486 | VOP_ATTR_LIST(vp, kbuf, al_hreq.buflen, al_hreq.flags, |
| 487 | cursor, NULL, error); |
| 488 | if (error) |
| 489 | goto out_kfree; |
| 490 | |
| 491 | if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) |
| 492 | error = -EFAULT; |
| 493 | |
| 494 | out_kfree: |
| 495 | kfree(kbuf); |
| 496 | out_vn_rele: |
| 497 | VN_RELE(vp); |
| 498 | out: |
| 499 | return -error; |
| 500 | } |
| 501 | |
| 502 | STATIC int |
| 503 | xfs_attrmulti_attr_get( |
| 504 | struct vnode *vp, |
| 505 | char *name, |
| 506 | char __user *ubuf, |
| 507 | __uint32_t *len, |
| 508 | __uint32_t flags) |
| 509 | { |
| 510 | char *kbuf; |
| 511 | int error = EFAULT; |
| 512 | |
| 513 | if (*len > XATTR_SIZE_MAX) |
| 514 | return EINVAL; |
| 515 | kbuf = kmalloc(*len, GFP_KERNEL); |
| 516 | if (!kbuf) |
| 517 | return ENOMEM; |
| 518 | |
| 519 | VOP_ATTR_GET(vp, name, kbuf, len, flags, NULL, error); |
| 520 | if (error) |
| 521 | goto out_kfree; |
| 522 | |
| 523 | if (copy_to_user(ubuf, kbuf, *len)) |
| 524 | error = EFAULT; |
| 525 | |
| 526 | out_kfree: |
| 527 | kfree(kbuf); |
| 528 | return error; |
| 529 | } |
| 530 | |
| 531 | STATIC int |
| 532 | xfs_attrmulti_attr_set( |
| 533 | struct vnode *vp, |
| 534 | char *name, |
| 535 | const char __user *ubuf, |
| 536 | __uint32_t len, |
| 537 | __uint32_t flags) |
| 538 | { |
| 539 | char *kbuf; |
| 540 | int error = EFAULT; |
| 541 | |
| 542 | if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode)) |
| 543 | return EPERM; |
| 544 | if (len > XATTR_SIZE_MAX) |
| 545 | return EINVAL; |
| 546 | |
| 547 | kbuf = kmalloc(len, GFP_KERNEL); |
| 548 | if (!kbuf) |
| 549 | return ENOMEM; |
| 550 | |
| 551 | if (copy_from_user(kbuf, ubuf, len)) |
| 552 | goto out_kfree; |
| 553 | |
| 554 | VOP_ATTR_SET(vp, name, kbuf, len, flags, NULL, error); |
| 555 | |
| 556 | out_kfree: |
| 557 | kfree(kbuf); |
| 558 | return error; |
| 559 | } |
| 560 | |
| 561 | STATIC int |
| 562 | xfs_attrmulti_attr_remove( |
| 563 | struct vnode *vp, |
| 564 | char *name, |
| 565 | __uint32_t flags) |
| 566 | { |
| 567 | int error; |
| 568 | |
| 569 | if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode)) |
| 570 | return EPERM; |
| 571 | |
| 572 | VOP_ATTR_REMOVE(vp, name, flags, NULL, error); |
| 573 | return error; |
| 574 | } |
| 575 | |
| 576 | STATIC int |
| 577 | xfs_attrmulti_by_handle( |
| 578 | xfs_mount_t *mp, |
| 579 | void __user *arg, |
| 580 | struct file *parfilp, |
| 581 | struct inode *parinode) |
| 582 | { |
| 583 | int error; |
| 584 | xfs_attr_multiop_t *ops; |
| 585 | xfs_fsop_attrmulti_handlereq_t am_hreq; |
| 586 | struct inode *inode; |
| 587 | vnode_t *vp; |
| 588 | unsigned int i, size; |
| 589 | char *attr_name; |
| 590 | |
| 591 | if (!capable(CAP_SYS_ADMIN)) |
| 592 | return -XFS_ERROR(EPERM); |
| 593 | if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) |
| 594 | return -XFS_ERROR(EFAULT); |
| 595 | |
| 596 | error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &vp, &inode); |
| 597 | if (error) |
| 598 | goto out; |
| 599 | |
| 600 | error = E2BIG; |
| 601 | size = am_hreq.opcount * sizeof(attr_multiop_t); |
| 602 | if (!size || size > 16 * PAGE_SIZE) |
| 603 | goto out_vn_rele; |
| 604 | |
| 605 | error = ENOMEM; |
| 606 | ops = kmalloc(size, GFP_KERNEL); |
| 607 | if (!ops) |
| 608 | goto out_vn_rele; |
| 609 | |
| 610 | error = EFAULT; |
| 611 | if (copy_from_user(ops, am_hreq.ops, size)) |
| 612 | goto out_kfree_ops; |
| 613 | |
| 614 | attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); |
| 615 | if (!attr_name) |
| 616 | goto out_kfree_ops; |
| 617 | |
| 618 | |
| 619 | error = 0; |
| 620 | for (i = 0; i < am_hreq.opcount; i++) { |
| 621 | ops[i].am_error = strncpy_from_user(attr_name, |
| 622 | ops[i].am_attrname, MAXNAMELEN); |
| 623 | if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) |
| 624 | error = -ERANGE; |
| 625 | if (ops[i].am_error < 0) |
| 626 | break; |
| 627 | |
| 628 | switch (ops[i].am_opcode) { |
| 629 | case ATTR_OP_GET: |
| 630 | ops[i].am_error = xfs_attrmulti_attr_get(vp, |
| 631 | attr_name, ops[i].am_attrvalue, |
| 632 | &ops[i].am_length, ops[i].am_flags); |
| 633 | break; |
| 634 | case ATTR_OP_SET: |
| 635 | ops[i].am_error = xfs_attrmulti_attr_set(vp, |
| 636 | attr_name, ops[i].am_attrvalue, |
| 637 | ops[i].am_length, ops[i].am_flags); |
| 638 | break; |
| 639 | case ATTR_OP_REMOVE: |
| 640 | ops[i].am_error = xfs_attrmulti_attr_remove(vp, |
| 641 | attr_name, ops[i].am_flags); |
| 642 | break; |
| 643 | default: |
| 644 | ops[i].am_error = EINVAL; |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | if (copy_to_user(am_hreq.ops, ops, size)) |
| 649 | error = XFS_ERROR(EFAULT); |
| 650 | |
| 651 | kfree(attr_name); |
| 652 | out_kfree_ops: |
| 653 | kfree(ops); |
| 654 | out_vn_rele: |
| 655 | VN_RELE(vp); |
| 656 | out: |
| 657 | return -error; |
| 658 | } |
| 659 | |
| 660 | /* prototypes for a few of the stack-hungry cases that have |
| 661 | * their own functions. Functions are defined after their use |
| 662 | * so gcc doesn't get fancy and inline them with -03 */ |
| 663 | |
| 664 | STATIC int |
| 665 | xfs_ioc_space( |
| 666 | bhv_desc_t *bdp, |
| 667 | vnode_t *vp, |
| 668 | struct file *filp, |
| 669 | int flags, |
| 670 | unsigned int cmd, |
| 671 | void __user *arg); |
| 672 | |
| 673 | STATIC int |
| 674 | xfs_ioc_bulkstat( |
| 675 | xfs_mount_t *mp, |
| 676 | unsigned int cmd, |
| 677 | void __user *arg); |
| 678 | |
| 679 | STATIC int |
| 680 | xfs_ioc_fsgeometry_v1( |
| 681 | xfs_mount_t *mp, |
| 682 | void __user *arg); |
| 683 | |
| 684 | STATIC int |
| 685 | xfs_ioc_fsgeometry( |
| 686 | xfs_mount_t *mp, |
| 687 | void __user *arg); |
| 688 | |
| 689 | STATIC int |
| 690 | xfs_ioc_xattr( |
| 691 | vnode_t *vp, |
| 692 | xfs_inode_t *ip, |
| 693 | struct file *filp, |
| 694 | unsigned int cmd, |
| 695 | void __user *arg); |
| 696 | |
| 697 | STATIC int |
| 698 | xfs_ioc_getbmap( |
| 699 | bhv_desc_t *bdp, |
| 700 | struct file *filp, |
| 701 | int flags, |
| 702 | unsigned int cmd, |
| 703 | void __user *arg); |
| 704 | |
| 705 | STATIC int |
| 706 | xfs_ioc_getbmapx( |
| 707 | bhv_desc_t *bdp, |
| 708 | void __user *arg); |
| 709 | |
| 710 | int |
| 711 | xfs_ioctl( |
| 712 | bhv_desc_t *bdp, |
| 713 | struct inode *inode, |
| 714 | struct file *filp, |
| 715 | int ioflags, |
| 716 | unsigned int cmd, |
| 717 | void __user *arg) |
| 718 | { |
| 719 | int error; |
| 720 | vnode_t *vp; |
| 721 | xfs_inode_t *ip; |
| 722 | xfs_mount_t *mp; |
| 723 | |
| 724 | vp = LINVFS_GET_VP(inode); |
| 725 | |
| 726 | vn_trace_entry(vp, "xfs_ioctl", (inst_t *)__return_address); |
| 727 | |
| 728 | ip = XFS_BHVTOI(bdp); |
| 729 | mp = ip->i_mount; |
| 730 | |
| 731 | switch (cmd) { |
| 732 | |
| 733 | case XFS_IOC_ALLOCSP: |
| 734 | case XFS_IOC_FREESP: |
| 735 | case XFS_IOC_RESVSP: |
| 736 | case XFS_IOC_UNRESVSP: |
| 737 | case XFS_IOC_ALLOCSP64: |
| 738 | case XFS_IOC_FREESP64: |
| 739 | case XFS_IOC_RESVSP64: |
| 740 | case XFS_IOC_UNRESVSP64: |
| 741 | /* |
| 742 | * Only allow the sys admin to reserve space unless |
| 743 | * unwritten extents are enabled. |
| 744 | */ |
| 745 | if (!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) && |
| 746 | !capable(CAP_SYS_ADMIN)) |
| 747 | return -EPERM; |
| 748 | |
| 749 | return xfs_ioc_space(bdp, vp, filp, ioflags, cmd, arg); |
| 750 | |
| 751 | case XFS_IOC_DIOINFO: { |
| 752 | struct dioattr da; |
| 753 | xfs_buftarg_t *target = |
| 754 | (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ? |
| 755 | mp->m_rtdev_targp : mp->m_ddev_targp; |
| 756 | |
| 757 | da.d_mem = da.d_miniosz = 1 << target->pbr_sshift; |
| 758 | /* The size dio will do in one go */ |
| 759 | da.d_maxiosz = 64 * PAGE_CACHE_SIZE; |
| 760 | |
| 761 | if (copy_to_user(arg, &da, sizeof(da))) |
| 762 | return -XFS_ERROR(EFAULT); |
| 763 | return 0; |
| 764 | } |
| 765 | |
| 766 | case XFS_IOC_FSBULKSTAT_SINGLE: |
| 767 | case XFS_IOC_FSBULKSTAT: |
| 768 | case XFS_IOC_FSINUMBERS: |
| 769 | return xfs_ioc_bulkstat(mp, cmd, arg); |
| 770 | |
| 771 | case XFS_IOC_FSGEOMETRY_V1: |
| 772 | return xfs_ioc_fsgeometry_v1(mp, arg); |
| 773 | |
| 774 | case XFS_IOC_FSGEOMETRY: |
| 775 | return xfs_ioc_fsgeometry(mp, arg); |
| 776 | |
| 777 | case XFS_IOC_GETVERSION: |
| 778 | case XFS_IOC_GETXFLAGS: |
| 779 | case XFS_IOC_SETXFLAGS: |
| 780 | case XFS_IOC_FSGETXATTR: |
| 781 | case XFS_IOC_FSSETXATTR: |
| 782 | case XFS_IOC_FSGETXATTRA: |
| 783 | return xfs_ioc_xattr(vp, ip, filp, cmd, arg); |
| 784 | |
| 785 | case XFS_IOC_FSSETDM: { |
| 786 | struct fsdmidata dmi; |
| 787 | |
| 788 | if (copy_from_user(&dmi, arg, sizeof(dmi))) |
| 789 | return -XFS_ERROR(EFAULT); |
| 790 | |
| 791 | error = xfs_set_dmattrs(bdp, dmi.fsd_dmevmask, dmi.fsd_dmstate, |
| 792 | NULL); |
| 793 | return -error; |
| 794 | } |
| 795 | |
| 796 | case XFS_IOC_GETBMAP: |
| 797 | case XFS_IOC_GETBMAPA: |
| 798 | return xfs_ioc_getbmap(bdp, filp, ioflags, cmd, arg); |
| 799 | |
| 800 | case XFS_IOC_GETBMAPX: |
| 801 | return xfs_ioc_getbmapx(bdp, arg); |
| 802 | |
| 803 | case XFS_IOC_FD_TO_HANDLE: |
| 804 | case XFS_IOC_PATH_TO_HANDLE: |
| 805 | case XFS_IOC_PATH_TO_FSHANDLE: |
| 806 | return xfs_find_handle(cmd, arg); |
| 807 | |
| 808 | case XFS_IOC_OPEN_BY_HANDLE: |
| 809 | return xfs_open_by_handle(mp, arg, filp, inode); |
| 810 | |
| 811 | case XFS_IOC_FSSETDM_BY_HANDLE: |
| 812 | return xfs_fssetdm_by_handle(mp, arg, filp, inode); |
| 813 | |
| 814 | case XFS_IOC_READLINK_BY_HANDLE: |
| 815 | return xfs_readlink_by_handle(mp, arg, filp, inode); |
| 816 | |
| 817 | case XFS_IOC_ATTRLIST_BY_HANDLE: |
| 818 | return xfs_attrlist_by_handle(mp, arg, filp, inode); |
| 819 | |
| 820 | case XFS_IOC_ATTRMULTI_BY_HANDLE: |
| 821 | return xfs_attrmulti_by_handle(mp, arg, filp, inode); |
| 822 | |
| 823 | case XFS_IOC_SWAPEXT: { |
| 824 | error = xfs_swapext((struct xfs_swapext __user *)arg); |
| 825 | return -error; |
| 826 | } |
| 827 | |
| 828 | case XFS_IOC_FSCOUNTS: { |
| 829 | xfs_fsop_counts_t out; |
| 830 | |
| 831 | error = xfs_fs_counts(mp, &out); |
| 832 | if (error) |
| 833 | return -error; |
| 834 | |
| 835 | if (copy_to_user(arg, &out, sizeof(out))) |
| 836 | return -XFS_ERROR(EFAULT); |
| 837 | return 0; |
| 838 | } |
| 839 | |
| 840 | case XFS_IOC_SET_RESBLKS: { |
| 841 | xfs_fsop_resblks_t inout; |
| 842 | __uint64_t in; |
| 843 | |
| 844 | if (!capable(CAP_SYS_ADMIN)) |
| 845 | return -EPERM; |
| 846 | |
| 847 | if (copy_from_user(&inout, arg, sizeof(inout))) |
| 848 | return -XFS_ERROR(EFAULT); |
| 849 | |
| 850 | /* input parameter is passed in resblks field of structure */ |
| 851 | in = inout.resblks; |
| 852 | error = xfs_reserve_blocks(mp, &in, &inout); |
| 853 | if (error) |
| 854 | return -error; |
| 855 | |
| 856 | if (copy_to_user(arg, &inout, sizeof(inout))) |
| 857 | return -XFS_ERROR(EFAULT); |
| 858 | return 0; |
| 859 | } |
| 860 | |
| 861 | case XFS_IOC_GET_RESBLKS: { |
| 862 | xfs_fsop_resblks_t out; |
| 863 | |
| 864 | if (!capable(CAP_SYS_ADMIN)) |
| 865 | return -EPERM; |
| 866 | |
| 867 | error = xfs_reserve_blocks(mp, NULL, &out); |
| 868 | if (error) |
| 869 | return -error; |
| 870 | |
| 871 | if (copy_to_user(arg, &out, sizeof(out))) |
| 872 | return -XFS_ERROR(EFAULT); |
| 873 | |
| 874 | return 0; |
| 875 | } |
| 876 | |
| 877 | case XFS_IOC_FSGROWFSDATA: { |
| 878 | xfs_growfs_data_t in; |
| 879 | |
| 880 | if (!capable(CAP_SYS_ADMIN)) |
| 881 | return -EPERM; |
| 882 | |
| 883 | if (copy_from_user(&in, arg, sizeof(in))) |
| 884 | return -XFS_ERROR(EFAULT); |
| 885 | |
| 886 | error = xfs_growfs_data(mp, &in); |
| 887 | return -error; |
| 888 | } |
| 889 | |
| 890 | case XFS_IOC_FSGROWFSLOG: { |
| 891 | xfs_growfs_log_t in; |
| 892 | |
| 893 | if (!capable(CAP_SYS_ADMIN)) |
| 894 | return -EPERM; |
| 895 | |
| 896 | if (copy_from_user(&in, arg, sizeof(in))) |
| 897 | return -XFS_ERROR(EFAULT); |
| 898 | |
| 899 | error = xfs_growfs_log(mp, &in); |
| 900 | return -error; |
| 901 | } |
| 902 | |
| 903 | case XFS_IOC_FSGROWFSRT: { |
| 904 | xfs_growfs_rt_t in; |
| 905 | |
| 906 | if (!capable(CAP_SYS_ADMIN)) |
| 907 | return -EPERM; |
| 908 | |
| 909 | if (copy_from_user(&in, arg, sizeof(in))) |
| 910 | return -XFS_ERROR(EFAULT); |
| 911 | |
| 912 | error = xfs_growfs_rt(mp, &in); |
| 913 | return -error; |
| 914 | } |
| 915 | |
| 916 | case XFS_IOC_FREEZE: |
| 917 | if (!capable(CAP_SYS_ADMIN)) |
| 918 | return -EPERM; |
| 919 | |
| 920 | if (inode->i_sb->s_frozen == SB_UNFROZEN) |
| 921 | freeze_bdev(inode->i_sb->s_bdev); |
| 922 | return 0; |
| 923 | |
| 924 | case XFS_IOC_THAW: |
| 925 | if (!capable(CAP_SYS_ADMIN)) |
| 926 | return -EPERM; |
| 927 | if (inode->i_sb->s_frozen != SB_UNFROZEN) |
| 928 | thaw_bdev(inode->i_sb->s_bdev, inode->i_sb); |
| 929 | return 0; |
| 930 | |
| 931 | case XFS_IOC_GOINGDOWN: { |
| 932 | __uint32_t in; |
| 933 | |
| 934 | if (!capable(CAP_SYS_ADMIN)) |
| 935 | return -EPERM; |
| 936 | |
| 937 | if (get_user(in, (__uint32_t __user *)arg)) |
| 938 | return -XFS_ERROR(EFAULT); |
| 939 | |
| 940 | error = xfs_fs_goingdown(mp, in); |
| 941 | return -error; |
| 942 | } |
| 943 | |
| 944 | case XFS_IOC_ERROR_INJECTION: { |
| 945 | xfs_error_injection_t in; |
| 946 | |
| 947 | if (!capable(CAP_SYS_ADMIN)) |
| 948 | return -EPERM; |
| 949 | |
| 950 | if (copy_from_user(&in, arg, sizeof(in))) |
| 951 | return -XFS_ERROR(EFAULT); |
| 952 | |
| 953 | error = xfs_errortag_add(in.errtag, mp); |
| 954 | return -error; |
| 955 | } |
| 956 | |
| 957 | case XFS_IOC_ERROR_CLEARALL: |
| 958 | if (!capable(CAP_SYS_ADMIN)) |
| 959 | return -EPERM; |
| 960 | |
| 961 | error = xfs_errortag_clearall(mp); |
| 962 | return -error; |
| 963 | |
| 964 | default: |
| 965 | return -ENOTTY; |
| 966 | } |
| 967 | } |
| 968 | |
| 969 | STATIC int |
| 970 | xfs_ioc_space( |
| 971 | bhv_desc_t *bdp, |
| 972 | vnode_t *vp, |
| 973 | struct file *filp, |
| 974 | int ioflags, |
| 975 | unsigned int cmd, |
| 976 | void __user *arg) |
| 977 | { |
| 978 | xfs_flock64_t bf; |
| 979 | int attr_flags = 0; |
| 980 | int error; |
| 981 | |
| 982 | if (vp->v_inode.i_flags & (S_IMMUTABLE|S_APPEND)) |
| 983 | return -XFS_ERROR(EPERM); |
| 984 | |
| 985 | if (!(filp->f_flags & FMODE_WRITE)) |
| 986 | return -XFS_ERROR(EBADF); |
| 987 | |
| 988 | if (vp->v_type != VREG) |
| 989 | return -XFS_ERROR(EINVAL); |
| 990 | |
| 991 | if (copy_from_user(&bf, arg, sizeof(bf))) |
| 992 | return -XFS_ERROR(EFAULT); |
| 993 | |
| 994 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| 995 | attr_flags |= ATTR_NONBLOCK; |
| 996 | if (ioflags & IO_INVIS) |
| 997 | attr_flags |= ATTR_DMI; |
| 998 | |
| 999 | error = xfs_change_file_space(bdp, cmd, &bf, filp->f_pos, |
| 1000 | NULL, attr_flags); |
| 1001 | return -error; |
| 1002 | } |
| 1003 | |
| 1004 | STATIC int |
| 1005 | xfs_ioc_bulkstat( |
| 1006 | xfs_mount_t *mp, |
| 1007 | unsigned int cmd, |
| 1008 | void __user *arg) |
| 1009 | { |
| 1010 | xfs_fsop_bulkreq_t bulkreq; |
| 1011 | int count; /* # of records returned */ |
| 1012 | xfs_ino_t inlast; /* last inode number */ |
| 1013 | int done; |
| 1014 | int error; |
| 1015 | |
| 1016 | /* done = 1 if there are more stats to get and if bulkstat */ |
| 1017 | /* should be called again (unused here, but used in dmapi) */ |
| 1018 | |
| 1019 | if (!capable(CAP_SYS_ADMIN)) |
| 1020 | return -EPERM; |
| 1021 | |
| 1022 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1023 | return -XFS_ERROR(EIO); |
| 1024 | |
| 1025 | if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) |
| 1026 | return -XFS_ERROR(EFAULT); |
| 1027 | |
| 1028 | if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) |
| 1029 | return -XFS_ERROR(EFAULT); |
| 1030 | |
| 1031 | if ((count = bulkreq.icount) <= 0) |
| 1032 | return -XFS_ERROR(EINVAL); |
| 1033 | |
| 1034 | if (cmd == XFS_IOC_FSINUMBERS) |
| 1035 | error = xfs_inumbers(mp, &inlast, &count, |
| 1036 | bulkreq.ubuffer); |
| 1037 | else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) |
| 1038 | error = xfs_bulkstat_single(mp, &inlast, |
| 1039 | bulkreq.ubuffer, &done); |
| 1040 | else { /* XFS_IOC_FSBULKSTAT */ |
| 1041 | if (count == 1 && inlast != 0) { |
| 1042 | inlast++; |
| 1043 | error = xfs_bulkstat_single(mp, &inlast, |
| 1044 | bulkreq.ubuffer, &done); |
| 1045 | } else { |
| 1046 | error = xfs_bulkstat(mp, &inlast, &count, |
| 1047 | (bulkstat_one_pf)xfs_bulkstat_one, NULL, |
| 1048 | sizeof(xfs_bstat_t), bulkreq.ubuffer, |
| 1049 | BULKSTAT_FG_QUICK, &done); |
| 1050 | } |
| 1051 | } |
| 1052 | |
| 1053 | if (error) |
| 1054 | return -error; |
| 1055 | |
| 1056 | if (bulkreq.ocount != NULL) { |
| 1057 | if (copy_to_user(bulkreq.lastip, &inlast, |
| 1058 | sizeof(xfs_ino_t))) |
| 1059 | return -XFS_ERROR(EFAULT); |
| 1060 | |
| 1061 | if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) |
| 1062 | return -XFS_ERROR(EFAULT); |
| 1063 | } |
| 1064 | |
| 1065 | return 0; |
| 1066 | } |
| 1067 | |
| 1068 | STATIC int |
| 1069 | xfs_ioc_fsgeometry_v1( |
| 1070 | xfs_mount_t *mp, |
| 1071 | void __user *arg) |
| 1072 | { |
| 1073 | xfs_fsop_geom_v1_t fsgeo; |
| 1074 | int error; |
| 1075 | |
| 1076 | error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3); |
| 1077 | if (error) |
| 1078 | return -error; |
| 1079 | |
| 1080 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) |
| 1081 | return -XFS_ERROR(EFAULT); |
| 1082 | return 0; |
| 1083 | } |
| 1084 | |
| 1085 | STATIC int |
| 1086 | xfs_ioc_fsgeometry( |
| 1087 | xfs_mount_t *mp, |
| 1088 | void __user *arg) |
| 1089 | { |
| 1090 | xfs_fsop_geom_t fsgeo; |
| 1091 | int error; |
| 1092 | |
| 1093 | error = xfs_fs_geometry(mp, &fsgeo, 4); |
| 1094 | if (error) |
| 1095 | return -error; |
| 1096 | |
| 1097 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) |
| 1098 | return -XFS_ERROR(EFAULT); |
| 1099 | return 0; |
| 1100 | } |
| 1101 | |
| 1102 | /* |
| 1103 | * Linux extended inode flags interface. |
| 1104 | */ |
| 1105 | #define LINUX_XFLAG_SYNC 0x00000008 /* Synchronous updates */ |
| 1106 | #define LINUX_XFLAG_IMMUTABLE 0x00000010 /* Immutable file */ |
| 1107 | #define LINUX_XFLAG_APPEND 0x00000020 /* writes to file may only append */ |
| 1108 | #define LINUX_XFLAG_NODUMP 0x00000040 /* do not dump file */ |
| 1109 | #define LINUX_XFLAG_NOATIME 0x00000080 /* do not update atime */ |
| 1110 | |
| 1111 | STATIC unsigned int |
| 1112 | xfs_merge_ioc_xflags( |
| 1113 | unsigned int flags, |
| 1114 | unsigned int start) |
| 1115 | { |
| 1116 | unsigned int xflags = start; |
| 1117 | |
| 1118 | if (flags & LINUX_XFLAG_IMMUTABLE) |
| 1119 | xflags |= XFS_XFLAG_IMMUTABLE; |
| 1120 | else |
| 1121 | xflags &= ~XFS_XFLAG_IMMUTABLE; |
| 1122 | if (flags & LINUX_XFLAG_APPEND) |
| 1123 | xflags |= XFS_XFLAG_APPEND; |
| 1124 | else |
| 1125 | xflags &= ~XFS_XFLAG_APPEND; |
| 1126 | if (flags & LINUX_XFLAG_SYNC) |
| 1127 | xflags |= XFS_XFLAG_SYNC; |
| 1128 | else |
| 1129 | xflags &= ~XFS_XFLAG_SYNC; |
| 1130 | if (flags & LINUX_XFLAG_NOATIME) |
| 1131 | xflags |= XFS_XFLAG_NOATIME; |
| 1132 | else |
| 1133 | xflags &= ~XFS_XFLAG_NOATIME; |
| 1134 | if (flags & LINUX_XFLAG_NODUMP) |
| 1135 | xflags |= XFS_XFLAG_NODUMP; |
| 1136 | else |
| 1137 | xflags &= ~XFS_XFLAG_NODUMP; |
| 1138 | |
| 1139 | return xflags; |
| 1140 | } |
| 1141 | |
| 1142 | STATIC unsigned int |
| 1143 | xfs_di2lxflags( |
| 1144 | __uint16_t di_flags) |
| 1145 | { |
| 1146 | unsigned int flags = 0; |
| 1147 | |
| 1148 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
| 1149 | flags |= LINUX_XFLAG_IMMUTABLE; |
| 1150 | if (di_flags & XFS_DIFLAG_APPEND) |
| 1151 | flags |= LINUX_XFLAG_APPEND; |
| 1152 | if (di_flags & XFS_DIFLAG_SYNC) |
| 1153 | flags |= LINUX_XFLAG_SYNC; |
| 1154 | if (di_flags & XFS_DIFLAG_NOATIME) |
| 1155 | flags |= LINUX_XFLAG_NOATIME; |
| 1156 | if (di_flags & XFS_DIFLAG_NODUMP) |
| 1157 | flags |= LINUX_XFLAG_NODUMP; |
| 1158 | return flags; |
| 1159 | } |
| 1160 | |
| 1161 | STATIC int |
| 1162 | xfs_ioc_xattr( |
| 1163 | vnode_t *vp, |
| 1164 | xfs_inode_t *ip, |
| 1165 | struct file *filp, |
| 1166 | unsigned int cmd, |
| 1167 | void __user *arg) |
| 1168 | { |
| 1169 | struct fsxattr fa; |
| 1170 | vattr_t va; |
| 1171 | int error; |
| 1172 | int attr_flags; |
| 1173 | unsigned int flags; |
| 1174 | |
| 1175 | switch (cmd) { |
| 1176 | case XFS_IOC_FSGETXATTR: { |
| 1177 | va.va_mask = XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS; |
| 1178 | VOP_GETATTR(vp, &va, 0, NULL, error); |
| 1179 | if (error) |
| 1180 | return -error; |
| 1181 | |
| 1182 | fa.fsx_xflags = va.va_xflags; |
| 1183 | fa.fsx_extsize = va.va_extsize; |
| 1184 | fa.fsx_nextents = va.va_nextents; |
| 1185 | |
| 1186 | if (copy_to_user(arg, &fa, sizeof(fa))) |
| 1187 | return -XFS_ERROR(EFAULT); |
| 1188 | return 0; |
| 1189 | } |
| 1190 | |
| 1191 | case XFS_IOC_FSSETXATTR: { |
| 1192 | if (copy_from_user(&fa, arg, sizeof(fa))) |
| 1193 | return -XFS_ERROR(EFAULT); |
| 1194 | |
| 1195 | attr_flags = 0; |
| 1196 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| 1197 | attr_flags |= ATTR_NONBLOCK; |
| 1198 | |
| 1199 | va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE; |
| 1200 | va.va_xflags = fa.fsx_xflags; |
| 1201 | va.va_extsize = fa.fsx_extsize; |
| 1202 | |
| 1203 | VOP_SETATTR(vp, &va, attr_flags, NULL, error); |
| 1204 | if (!error) |
| 1205 | vn_revalidate(vp); /* update Linux inode flags */ |
| 1206 | return -error; |
| 1207 | } |
| 1208 | |
| 1209 | case XFS_IOC_FSGETXATTRA: { |
| 1210 | va.va_mask = XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_ANEXTENTS; |
| 1211 | VOP_GETATTR(vp, &va, 0, NULL, error); |
| 1212 | if (error) |
| 1213 | return -error; |
| 1214 | |
| 1215 | fa.fsx_xflags = va.va_xflags; |
| 1216 | fa.fsx_extsize = va.va_extsize; |
| 1217 | fa.fsx_nextents = va.va_anextents; |
| 1218 | |
| 1219 | if (copy_to_user(arg, &fa, sizeof(fa))) |
| 1220 | return -XFS_ERROR(EFAULT); |
| 1221 | return 0; |
| 1222 | } |
| 1223 | |
| 1224 | case XFS_IOC_GETXFLAGS: { |
| 1225 | flags = xfs_di2lxflags(ip->i_d.di_flags); |
| 1226 | if (copy_to_user(arg, &flags, sizeof(flags))) |
| 1227 | return -XFS_ERROR(EFAULT); |
| 1228 | return 0; |
| 1229 | } |
| 1230 | |
| 1231 | case XFS_IOC_SETXFLAGS: { |
| 1232 | if (copy_from_user(&flags, arg, sizeof(flags))) |
| 1233 | return -XFS_ERROR(EFAULT); |
| 1234 | |
| 1235 | if (flags & ~(LINUX_XFLAG_IMMUTABLE | LINUX_XFLAG_APPEND | \ |
| 1236 | LINUX_XFLAG_NOATIME | LINUX_XFLAG_NODUMP | \ |
| 1237 | LINUX_XFLAG_SYNC)) |
| 1238 | return -XFS_ERROR(EOPNOTSUPP); |
| 1239 | |
| 1240 | attr_flags = 0; |
| 1241 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| 1242 | attr_flags |= ATTR_NONBLOCK; |
| 1243 | |
| 1244 | va.va_mask = XFS_AT_XFLAGS; |
| 1245 | va.va_xflags = xfs_merge_ioc_xflags(flags, |
| 1246 | xfs_ip2xflags(ip)); |
| 1247 | |
| 1248 | VOP_SETATTR(vp, &va, attr_flags, NULL, error); |
| 1249 | if (!error) |
| 1250 | vn_revalidate(vp); /* update Linux inode flags */ |
| 1251 | return -error; |
| 1252 | } |
| 1253 | |
| 1254 | case XFS_IOC_GETVERSION: { |
| 1255 | flags = LINVFS_GET_IP(vp)->i_generation; |
| 1256 | if (copy_to_user(arg, &flags, sizeof(flags))) |
| 1257 | return -XFS_ERROR(EFAULT); |
| 1258 | return 0; |
| 1259 | } |
| 1260 | |
| 1261 | default: |
| 1262 | return -ENOTTY; |
| 1263 | } |
| 1264 | } |
| 1265 | |
| 1266 | STATIC int |
| 1267 | xfs_ioc_getbmap( |
| 1268 | bhv_desc_t *bdp, |
| 1269 | struct file *filp, |
| 1270 | int ioflags, |
| 1271 | unsigned int cmd, |
| 1272 | void __user *arg) |
| 1273 | { |
| 1274 | struct getbmap bm; |
| 1275 | int iflags; |
| 1276 | int error; |
| 1277 | |
| 1278 | if (copy_from_user(&bm, arg, sizeof(bm))) |
| 1279 | return -XFS_ERROR(EFAULT); |
| 1280 | |
| 1281 | if (bm.bmv_count < 2) |
| 1282 | return -XFS_ERROR(EINVAL); |
| 1283 | |
| 1284 | iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); |
| 1285 | if (ioflags & IO_INVIS) |
| 1286 | iflags |= BMV_IF_NO_DMAPI_READ; |
| 1287 | |
| 1288 | error = xfs_getbmap(bdp, &bm, (struct getbmap __user *)arg+1, iflags); |
| 1289 | if (error) |
| 1290 | return -error; |
| 1291 | |
| 1292 | if (copy_to_user(arg, &bm, sizeof(bm))) |
| 1293 | return -XFS_ERROR(EFAULT); |
| 1294 | return 0; |
| 1295 | } |
| 1296 | |
| 1297 | STATIC int |
| 1298 | xfs_ioc_getbmapx( |
| 1299 | bhv_desc_t *bdp, |
| 1300 | void __user *arg) |
| 1301 | { |
| 1302 | struct getbmapx bmx; |
| 1303 | struct getbmap bm; |
| 1304 | int iflags; |
| 1305 | int error; |
| 1306 | |
| 1307 | if (copy_from_user(&bmx, arg, sizeof(bmx))) |
| 1308 | return -XFS_ERROR(EFAULT); |
| 1309 | |
| 1310 | if (bmx.bmv_count < 2) |
| 1311 | return -XFS_ERROR(EINVAL); |
| 1312 | |
| 1313 | /* |
| 1314 | * Map input getbmapx structure to a getbmap |
| 1315 | * structure for xfs_getbmap. |
| 1316 | */ |
| 1317 | GETBMAP_CONVERT(bmx, bm); |
| 1318 | |
| 1319 | iflags = bmx.bmv_iflags; |
| 1320 | |
| 1321 | if (iflags & (~BMV_IF_VALID)) |
| 1322 | return -XFS_ERROR(EINVAL); |
| 1323 | |
| 1324 | iflags |= BMV_IF_EXTENDED; |
| 1325 | |
| 1326 | error = xfs_getbmap(bdp, &bm, (struct getbmapx __user *)arg+1, iflags); |
| 1327 | if (error) |
| 1328 | return -error; |
| 1329 | |
| 1330 | GETBMAP_CONVERT(bm, bmx); |
| 1331 | |
| 1332 | if (copy_to_user(arg, &bmx, sizeof(bmx))) |
| 1333 | return -XFS_ERROR(EFAULT); |
| 1334 | |
| 1335 | return 0; |
| 1336 | } |