2 * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
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.
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.
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.
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.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
37 #include "xfs_trans.h"
42 #include "xfs_alloc.h"
43 #include "xfs_dmapi.h"
44 #include "xfs_quota.h"
45 #include "xfs_mount.h"
46 #include "xfs_alloc_btree.h"
47 #include "xfs_bmap_btree.h"
48 #include "xfs_ialloc_btree.h"
49 #include "xfs_btree.h"
50 #include "xfs_ialloc.h"
51 #include "xfs_attr_sf.h"
52 #include "xfs_dir_sf.h"
53 #include "xfs_dir2_sf.h"
54 #include "xfs_dinode.h"
55 #include "xfs_inode.h"
58 #include "xfs_rtalloc.h"
59 #include "xfs_error.h"
60 #include "xfs_itable.h"
66 #include "xfs_buf_item.h"
67 #include "xfs_utils.h"
69 #include <linux/xattr.h>
70 #include <linux/namei.h>
74 * Pull the link count and size up from the xfs inode to the linux inode
80 vnode_t *vp = LINVFS_GET_VP(ip);
84 va.va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS;
85 VOP_GETATTR(vp, &va, ATTR_LAZY, NULL, error);
87 ip->i_nlink = va.va_nlink;
88 ip->i_blocks = va.va_nblocks;
90 /* we're under i_sem so i_size can't change under us */
91 if (i_size_read(ip) != va.va_size)
92 i_size_write(ip, va.va_size);
97 * Determine whether a process has a valid fs_struct (kernel daemons
98 * like knfsd don't have an fs_struct).
100 * XXX(hch): nfsd is broken, better fix it instead.
103 has_fs_struct(struct task_struct *task)
105 return (task->fs != init_task.fs);
111 struct dentry *dentry,
117 vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir);
118 xfs_acl_t *default_acl = NULL;
119 attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS;
123 * Irix uses Missed'em'V split, but doesn't want to see
124 * the upper 5 bits of (14bit) major.
126 if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)
129 if (test_default_acl && test_default_acl(dvp)) {
130 if (!_ACL_ALLOC(default_acl))
132 if (!_ACL_GET_DEFAULT(dvp, default_acl)) {
133 _ACL_FREE(default_acl);
138 if (IS_POSIXACL(dir) && !default_acl && has_fs_struct(current))
139 mode &= ~current->fs->umask;
141 memset(&va, 0, sizeof(va));
142 va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
143 va.va_type = IFTOVT(mode);
146 switch (mode & S_IFMT) {
147 case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
148 va.va_rdev = sysv_encode_dev(rdev);
149 va.va_mask |= XFS_AT_RDEV;
152 VOP_CREATE(dvp, dentry, &va, &vp, NULL, error);
155 VOP_MKDIR(dvp, dentry, &va, &vp, NULL, error);
164 error = _ACL_INHERIT(vp, &va, default_acl);
168 struct dentry teardown = {};
172 * If we can't add the ACL we must back out.
173 * ENOSPC can hit here, among other things.
175 teardown.d_inode = ip = LINVFS_GET_IP(vp);
176 teardown.d_name = dentry->d_name;
181 VOP_RMDIR(dvp, &teardown, NULL, err2);
183 VOP_REMOVE(dvp, &teardown, NULL, err2);
187 _ACL_FREE(default_acl);
192 ip = LINVFS_GET_IP(vp);
194 if (S_ISCHR(mode) || S_ISBLK(mode))
196 else if (S_ISDIR(mode))
198 d_instantiate(dentry, ip);
199 validate_fields(dir);
207 struct dentry *dentry,
209 struct nameidata *nd)
211 return linvfs_mknod(dir, dentry, mode, 0);
217 struct dentry *dentry,
220 return linvfs_mknod(dir, dentry, mode|S_IFDIR, 0);
223 STATIC struct dentry *
226 struct dentry *dentry,
227 struct nameidata *nd)
229 struct vnode *vp = LINVFS_GET_VP(dir), *cvp;
232 if (dentry->d_name.len >= MAXNAMELEN)
233 return ERR_PTR(-ENAMETOOLONG);
235 VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error);
237 if (unlikely(error != ENOENT))
238 return ERR_PTR(-error);
243 return d_splice_alias(LINVFS_GET_IP(cvp), dentry);
248 struct dentry *old_dentry,
250 struct dentry *dentry)
252 struct inode *ip; /* inode of guy being linked to */
253 vnode_t *tdvp; /* target directory for new name/link */
254 vnode_t *vp; /* vp of name being linked */
257 ip = old_dentry->d_inode; /* inode being linked to */
258 if (S_ISDIR(ip->i_mode))
261 tdvp = LINVFS_GET_VP(dir);
262 vp = LINVFS_GET_VP(ip);
264 VOP_LINK(tdvp, vp, dentry, NULL, error);
269 d_instantiate(dentry, ip);
277 struct dentry *dentry)
280 vnode_t *dvp; /* directory containing name to remove */
283 inode = dentry->d_inode;
284 dvp = LINVFS_GET_VP(dir);
286 VOP_REMOVE(dvp, dentry, NULL, error);
288 validate_fields(dir); /* For size only */
289 validate_fields(inode);
298 struct dentry *dentry,
303 vnode_t *dvp; /* directory containing name of symlink */
304 vnode_t *cvp; /* used to lookup symlink to put in dentry */
307 dvp = LINVFS_GET_VP(dir);
310 memset(&va, 0, sizeof(va));
312 va.va_mode = irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO;
313 va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
316 VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error);
318 ASSERT(cvp->v_type == VLNK);
319 ip = LINVFS_GET_IP(cvp);
320 d_instantiate(dentry, ip);
321 validate_fields(dir);
322 validate_fields(ip); /* size needs update */
330 struct dentry *dentry)
332 struct inode *inode = dentry->d_inode;
333 vnode_t *dvp = LINVFS_GET_VP(dir);
336 VOP_RMDIR(dvp, dentry, NULL, error);
338 validate_fields(inode);
339 validate_fields(dir);
347 struct dentry *odentry,
349 struct dentry *ndentry)
351 struct inode *new_inode = ndentry->d_inode;
352 vnode_t *fvp; /* from directory */
353 vnode_t *tvp; /* target directory */
356 fvp = LINVFS_GET_VP(odir);
357 tvp = LINVFS_GET_VP(ndir);
359 VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error);
364 validate_fields(new_inode);
366 validate_fields(odir);
368 validate_fields(ndir);
373 * careful here - this function can get called recursively, so
374 * we need to be very careful about how much stack we use.
375 * uio is kmalloced for this reason...
379 struct dentry *dentry,
380 struct nameidata *nd)
391 link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL);
393 nd_set_link(nd, ERR_PTR(-ENOMEM));
397 uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL);
400 nd_set_link(nd, ERR_PTR(-ENOMEM));
404 vp = LINVFS_GET_VP(dentry->d_inode);
407 iov.iov_len = MAXNAMELEN;
411 uio->uio_segflg = UIO_SYSSPACE;
412 uio->uio_resid = MAXNAMELEN;
415 VOP_READLINK(vp, uio, 0, NULL, error);
418 link = ERR_PTR(-error);
420 link[MAXNAMELEN - uio->uio_resid] = '\0';
424 nd_set_link(nd, link);
428 static void linvfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
430 char *s = nd_get_link(nd);
435 #ifdef CONFIG_XFS_POSIX_ACL
440 struct nameidata *nd)
442 vnode_t *vp = LINVFS_GET_VP(inode);
445 mode <<= 6; /* convert from linux to vnode access bits */
446 VOP_ACCESS(vp, mode, NULL, error);
450 #define linvfs_permission NULL
455 struct vfsmount *mnt,
456 struct dentry *dentry,
459 struct inode *inode = dentry->d_inode;
460 vnode_t *vp = LINVFS_GET_VP(inode);
463 if (unlikely(vp->v_flag & VMODIFIED))
464 error = vn_revalidate(vp);
466 generic_fillattr(inode, stat);
472 struct dentry *dentry,
475 struct inode *inode = dentry->d_inode;
476 unsigned int ia_valid = attr->ia_valid;
477 vnode_t *vp = LINVFS_GET_VP(inode);
482 memset(&vattr, 0, sizeof(vattr_t));
483 if (ia_valid & ATTR_UID) {
484 vattr.va_mask |= XFS_AT_UID;
485 vattr.va_uid = attr->ia_uid;
487 if (ia_valid & ATTR_GID) {
488 vattr.va_mask |= XFS_AT_GID;
489 vattr.va_gid = attr->ia_gid;
491 if (ia_valid & ATTR_SIZE) {
492 vattr.va_mask |= XFS_AT_SIZE;
493 vattr.va_size = attr->ia_size;
495 if (ia_valid & ATTR_ATIME) {
496 vattr.va_mask |= XFS_AT_ATIME;
497 vattr.va_atime = attr->ia_atime;
499 if (ia_valid & ATTR_MTIME) {
500 vattr.va_mask |= XFS_AT_MTIME;
501 vattr.va_mtime = attr->ia_mtime;
503 if (ia_valid & ATTR_CTIME) {
504 vattr.va_mask |= XFS_AT_CTIME;
505 vattr.va_ctime = attr->ia_ctime;
507 if (ia_valid & ATTR_MODE) {
508 vattr.va_mask |= XFS_AT_MODE;
509 vattr.va_mode = attr->ia_mode;
510 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
511 inode->i_mode &= ~S_ISGID;
514 if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
517 if ((ia_valid & ATTR_NO_BLOCK))
518 flags |= ATTR_NONBLOCK;
521 VOP_SETATTR(vp, &vattr, flags, NULL, error);
532 block_truncate_page(inode->i_mapping, inode->i_size, linvfs_get_block);
537 struct dentry *dentry,
543 vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
544 char *attr = (char *)name;
549 namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
552 attr += namesp->attr_namelen;
553 error = namesp->attr_capable(vp, NULL);
557 /* Convert Linux syscall to XFS internal ATTR flags */
558 if (flags & XATTR_CREATE)
559 xflags |= ATTR_CREATE;
560 if (flags & XATTR_REPLACE)
561 xflags |= ATTR_REPLACE;
562 xflags |= namesp->attr_flag;
563 return namesp->attr_set(vp, attr, (void *)data, size, xflags);
568 struct dentry *dentry,
573 vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
574 char *attr = (char *)name;
579 namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
582 attr += namesp->attr_namelen;
583 error = namesp->attr_capable(vp, NULL);
587 /* Convert Linux syscall to XFS internal ATTR flags */
589 xflags |= ATTR_KERNOVAL;
592 xflags |= namesp->attr_flag;
593 return namesp->attr_get(vp, attr, (void *)data, size, xflags);
598 struct dentry *dentry,
602 vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
603 int error, xflags = ATTR_KERNAMELS;
607 xflags |= ATTR_KERNOVAL;
608 xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;
610 error = attr_generic_list(vp, data, size, xflags, &result);
618 struct dentry *dentry,
621 vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
622 char *attr = (char *)name;
627 namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
630 attr += namesp->attr_namelen;
631 error = namesp->attr_capable(vp, NULL);
634 xflags |= namesp->attr_flag;
635 return namesp->attr_remove(vp, attr, xflags);
639 struct inode_operations linvfs_file_inode_operations = {
640 .permission = linvfs_permission,
641 .truncate = linvfs_truncate,
642 .getattr = linvfs_getattr,
643 .setattr = linvfs_setattr,
644 .setxattr = linvfs_setxattr,
645 .getxattr = linvfs_getxattr,
646 .listxattr = linvfs_listxattr,
647 .removexattr = linvfs_removexattr,
650 struct inode_operations linvfs_dir_inode_operations = {
651 .create = linvfs_create,
652 .lookup = linvfs_lookup,
654 .unlink = linvfs_unlink,
655 .symlink = linvfs_symlink,
656 .mkdir = linvfs_mkdir,
657 .rmdir = linvfs_rmdir,
658 .mknod = linvfs_mknod,
659 .rename = linvfs_rename,
660 .permission = linvfs_permission,
661 .getattr = linvfs_getattr,
662 .setattr = linvfs_setattr,
663 .setxattr = linvfs_setxattr,
664 .getxattr = linvfs_getxattr,
665 .listxattr = linvfs_listxattr,
666 .removexattr = linvfs_removexattr,
669 struct inode_operations linvfs_symlink_inode_operations = {
670 .readlink = generic_readlink,
671 .follow_link = linvfs_follow_link,
672 .put_link = linvfs_put_link,
673 .permission = linvfs_permission,
674 .getattr = linvfs_getattr,
675 .setattr = linvfs_setattr,
676 .setxattr = linvfs_setxattr,
677 .getxattr = linvfs_getxattr,
678 .listxattr = linvfs_listxattr,
679 .removexattr = linvfs_removexattr,