2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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
7 * published by the Free Software Foundation.
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.
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
23 #include "xfs_trans.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_quota.h"
30 #include "xfs_mount.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
39 #include "xfs_btree.h"
40 #include "xfs_ialloc.h"
41 #include "xfs_rtalloc.h"
42 #include "xfs_error.h"
43 #include "xfs_itable.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_utils.h"
49 #include "xfs_vnodeops.h"
51 #include <linux/capability.h>
52 #include <linux/xattr.h>
53 #include <linux/namei.h>
54 #include <linux/security.h>
57 * Bring the atime in the XFS inode uptodate.
58 * Used before logging the inode to disk or when the Linux inode goes away.
61 xfs_synchronize_atime(
66 vp = XFS_ITOV_NULL(ip);
68 ip->i_d.di_atime.t_sec = (__int32_t)vp->i_atime.tv_sec;
69 ip->i_d.di_atime.t_nsec = (__int32_t)vp->i_atime.tv_nsec;
74 * Change the requested timestamp in the given inode.
75 * We don't lock across timestamp updates, and we don't log them but
76 * we do record the fact that there is dirty information in core.
78 * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG
79 * with XFS_ICHGTIME_ACC to be sure that access time
80 * update will take. Calling first with XFS_ICHGTIME_ACC
81 * and then XFS_ICHGTIME_MOD may fail to modify the access
82 * timestamp if the filesystem is mounted noacctm.
89 struct inode *inode = vn_to_inode(XFS_ITOV(ip));
93 if (flags & XFS_ICHGTIME_MOD) {
95 ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
96 ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
98 if (flags & XFS_ICHGTIME_ACC) {
100 ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec;
101 ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec;
103 if (flags & XFS_ICHGTIME_CHG) {
105 ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
106 ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
110 * We update the i_update_core field _after_ changing
111 * the timestamps in order to coordinate properly with
112 * xfs_iflush() so that we don't lose timestamp updates.
113 * This keeps us from having to hold the inode lock
114 * while doing this. We use the SYNCHRONIZE macro to
115 * ensure that the compiler does not reorder the update
116 * of i_update_core above the timestamp updates above.
119 ip->i_update_core = 1;
120 if (!(inode->i_state & I_NEW))
121 mark_inode_dirty_sync(inode);
125 * Variant on the above which avoids querying the system clock
126 * in situations where we know the Linux inode timestamps have
127 * just been updated (and so we can update our inode cheaply).
138 * Atime updates for read() & friends are handled lazily now, and
139 * explicit updates must go through xfs_ichgtime()
141 ASSERT((flags & XFS_ICHGTIME_ACC) == 0);
144 * We're not supposed to change timestamps in readonly-mounted
145 * filesystems. Throw it away if anyone asks us.
147 if (unlikely(IS_RDONLY(inode)))
150 if (flags & XFS_ICHGTIME_MOD) {
151 tvp = &inode->i_mtime;
152 ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec;
153 ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec;
155 if (flags & XFS_ICHGTIME_CHG) {
156 tvp = &inode->i_ctime;
157 ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec;
158 ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec;
162 * We update the i_update_core field _after_ changing
163 * the timestamps in order to coordinate properly with
164 * xfs_iflush() so that we don't lose timestamp updates.
165 * This keeps us from having to hold the inode lock
166 * while doing this. We use the SYNCHRONIZE macro to
167 * ensure that the compiler does not reorder the update
168 * of i_update_core above the timestamp updates above.
171 ip->i_update_core = 1;
172 if (!(inode->i_state & I_NEW))
173 mark_inode_dirty_sync(inode);
178 * Pull the link count and size up from the xfs inode to the linux inode
184 struct xfs_inode *ip = XFS_I(inode);
187 inode->i_nlink = ip->i_d.di_nlink;
189 XFS_FSB_TO_BB(ip->i_mount, ip->i_d.di_nblocks +
191 /* we're under i_sem so i_size can't change under us */
192 size = XFS_ISIZE(ip);
193 if (i_size_read(inode) != size)
194 i_size_write(inode, size);
198 * Hook in SELinux. This is not quite correct yet, what we really need
199 * here (as we do for default ACLs) is a mechanism by which creation of
200 * these attrs can be journalled at inode creation time (along with the
201 * inode, of course, such that log replay can't cause these to be lost).
208 struct inode *ip = vn_to_inode(vp);
214 error = security_inode_init_security(ip, dir, &name, &value, &length);
216 if (error == -EOPNOTSUPP)
221 error = xfs_attr_set(XFS_I(ip), name, value,
222 length, ATTR_SECURE);
224 xfs_iflags_set(XFS_I(ip), XFS_IMODIFIED);
232 * Determine whether a process has a valid fs_struct (kernel daemons
233 * like knfsd don't have an fs_struct).
235 * XXX(hch): nfsd is broken, better fix it instead.
238 xfs_has_fs_struct(struct task_struct *task)
240 return (task->fs != init_task.fs);
247 struct dentry *dentry,
250 struct dentry teardown = {};
253 * If we can't add the ACL or we fail in
254 * xfs_init_security we must back out.
255 * ENOSPC can hit here, among other things.
257 teardown.d_inode = vn_to_inode(vp);
258 teardown.d_name = dentry->d_name;
261 xfs_rmdir(XFS_I(dir), &teardown);
263 xfs_remove(XFS_I(dir), &teardown);
270 struct dentry *dentry,
275 bhv_vnode_t *vp = NULL, *dvp = vn_from_inode(dir);
276 xfs_acl_t *default_acl = NULL;
277 attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS;
281 * Irix uses Missed'em'V split, but doesn't want to see
282 * the upper 5 bits of (14bit) major.
284 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
287 if (unlikely(test_default_acl && test_default_acl(dvp))) {
288 if (!_ACL_ALLOC(default_acl)) {
291 if (!_ACL_GET_DEFAULT(dvp, default_acl)) {
292 _ACL_FREE(default_acl);
297 if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current))
298 mode &= ~current->fs->umask;
300 switch (mode & S_IFMT) {
301 case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
302 rdev = sysv_encode_dev(rdev);
304 error = xfs_create(XFS_I(dir), dentry, mode, rdev, &vp, NULL);
307 error = xfs_mkdir(XFS_I(dir), dentry, mode, &vp, NULL);
314 if (unlikely(!error)) {
315 error = xfs_init_security(vp, dir);
317 xfs_cleanup_inode(dir, vp, dentry, mode);
320 if (unlikely(default_acl)) {
322 error = _ACL_INHERIT(vp, mode, default_acl);
324 xfs_iflags_set(XFS_I(vp), XFS_IMODIFIED);
326 xfs_cleanup_inode(dir, vp, dentry, mode);
328 _ACL_FREE(default_acl);
331 if (likely(!error)) {
333 ip = vn_to_inode(vp);
336 xfs_validate_fields(ip);
337 d_instantiate(dentry, ip);
338 xfs_validate_fields(dir);
346 struct dentry *dentry,
348 struct nameidata *nd)
350 return xfs_vn_mknod(dir, dentry, mode, 0);
356 struct dentry *dentry,
359 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
362 STATIC struct dentry *
365 struct dentry *dentry,
366 struct nameidata *nd)
371 if (dentry->d_name.len >= MAXNAMELEN)
372 return ERR_PTR(-ENAMETOOLONG);
374 error = xfs_lookup(XFS_I(dir), dentry, &cvp);
375 if (unlikely(error)) {
376 if (unlikely(error != ENOENT))
377 return ERR_PTR(-error);
382 return d_splice_alias(vn_to_inode(cvp), dentry);
387 struct dentry *old_dentry,
389 struct dentry *dentry)
391 struct inode *ip; /* inode of guy being linked to */
392 bhv_vnode_t *vp; /* vp of name being linked */
395 ip = old_dentry->d_inode; /* inode being linked to */
396 vp = vn_from_inode(ip);
399 error = xfs_link(XFS_I(dir), vp, dentry);
400 if (unlikely(error)) {
403 xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED);
404 xfs_validate_fields(ip);
405 d_instantiate(dentry, ip);
413 struct dentry *dentry)
418 inode = dentry->d_inode;
420 error = xfs_remove(XFS_I(dir), dentry);
421 if (likely(!error)) {
422 xfs_validate_fields(dir); /* size needs update */
423 xfs_validate_fields(inode);
431 struct dentry *dentry,
435 bhv_vnode_t *cvp; /* used to lookup symlink to put in dentry */
442 (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
444 error = xfs_symlink(XFS_I(dir), dentry, (char *)symname, mode,
446 if (likely(!error && cvp)) {
447 error = xfs_init_security(cvp, dir);
448 if (likely(!error)) {
449 ip = vn_to_inode(cvp);
450 d_instantiate(dentry, ip);
451 xfs_validate_fields(dir);
452 xfs_validate_fields(ip);
454 xfs_cleanup_inode(dir, cvp, dentry, 0);
463 struct dentry *dentry)
465 struct inode *inode = dentry->d_inode;
468 error = xfs_rmdir(XFS_I(dir), dentry);
469 if (likely(!error)) {
470 xfs_validate_fields(inode);
471 xfs_validate_fields(dir);
479 struct dentry *odentry,
481 struct dentry *ndentry)
483 struct inode *new_inode = ndentry->d_inode;
484 bhv_vnode_t *tvp; /* target directory */
487 tvp = vn_from_inode(ndir);
489 error = xfs_rename(XFS_I(odir), odentry, tvp, ndentry);
490 if (likely(!error)) {
492 xfs_validate_fields(new_inode);
493 xfs_validate_fields(odir);
495 xfs_validate_fields(ndir);
501 * careful here - this function can get called recursively, so
502 * we need to be very careful about how much stack we use.
503 * uio is kmalloced for this reason...
507 struct dentry *dentry,
508 struct nameidata *nd)
513 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
517 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
521 nd_set_link(nd, link);
527 nd_set_link(nd, ERR_PTR(error));
533 struct dentry *dentry,
534 struct nameidata *nd,
537 char *s = nd_get_link(nd);
543 #ifdef CONFIG_XFS_POSIX_ACL
548 struct nameidata *nd)
550 return -xfs_access(XFS_I(inode), mode << 6, NULL);
553 #define xfs_vn_permission NULL
558 struct vfsmount *mnt,
559 struct dentry *dentry,
562 struct inode *inode = dentry->d_inode;
563 struct xfs_inode *ip = XFS_I(inode);
564 struct xfs_mount *mp = ip->i_mount;
566 xfs_itrace_entry(ip);
568 if (XFS_FORCED_SHUTDOWN(mp))
569 return XFS_ERROR(EIO);
571 stat->size = XFS_ISIZE(ip);
572 stat->dev = inode->i_sb->s_dev;
573 stat->mode = ip->i_d.di_mode;
574 stat->nlink = ip->i_d.di_nlink;
575 stat->uid = ip->i_d.di_uid;
576 stat->gid = ip->i_d.di_gid;
577 stat->ino = ip->i_ino;
579 stat->ino += mp->m_inoadd;
581 stat->atime = inode->i_atime;
582 stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec;
583 stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
584 stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec;
585 stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
587 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
590 switch (inode->i_mode & S_IFMT) {
593 stat->blksize = BLKDEV_IOSIZE;
594 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
595 sysv_minor(ip->i_df.if_u2.if_rdev));
598 if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) {
600 * If the file blocks are being allocated from a
601 * realtime volume, then return the inode's realtime
602 * extent size or the realtime volume's extent size.
605 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
607 stat->blksize = xfs_preferred_iosize(mp);
617 struct dentry *dentry,
620 struct inode *inode = dentry->d_inode;
621 unsigned int ia_valid = attr->ia_valid;
622 bhv_vattr_t vattr = { 0 };
626 if (ia_valid & ATTR_UID) {
627 vattr.va_mask |= XFS_AT_UID;
628 vattr.va_uid = attr->ia_uid;
630 if (ia_valid & ATTR_GID) {
631 vattr.va_mask |= XFS_AT_GID;
632 vattr.va_gid = attr->ia_gid;
634 if (ia_valid & ATTR_SIZE) {
635 vattr.va_mask |= XFS_AT_SIZE;
636 vattr.va_size = attr->ia_size;
638 if (ia_valid & ATTR_ATIME) {
639 vattr.va_mask |= XFS_AT_ATIME;
640 vattr.va_atime = attr->ia_atime;
641 inode->i_atime = attr->ia_atime;
643 if (ia_valid & ATTR_MTIME) {
644 vattr.va_mask |= XFS_AT_MTIME;
645 vattr.va_mtime = attr->ia_mtime;
647 if (ia_valid & ATTR_CTIME) {
648 vattr.va_mask |= XFS_AT_CTIME;
649 vattr.va_ctime = attr->ia_ctime;
651 if (ia_valid & ATTR_MODE) {
652 vattr.va_mask |= XFS_AT_MODE;
653 vattr.va_mode = attr->ia_mode;
654 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
655 inode->i_mode &= ~S_ISGID;
658 if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
661 if ((ia_valid & ATTR_NO_BLOCK))
662 flags |= ATTR_NONBLOCK;
665 error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL);
667 vn_revalidate(vn_from_inode(inode));
675 block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks);
680 struct dentry *dentry,
686 bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
687 char *attr = (char *)name;
692 namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
695 attr += namesp->attr_namelen;
696 error = namesp->attr_capable(vp, NULL);
700 /* Convert Linux syscall to XFS internal ATTR flags */
701 if (flags & XATTR_CREATE)
702 xflags |= ATTR_CREATE;
703 if (flags & XATTR_REPLACE)
704 xflags |= ATTR_REPLACE;
705 xflags |= namesp->attr_flag;
706 return namesp->attr_set(vp, attr, (void *)data, size, xflags);
711 struct dentry *dentry,
716 bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
717 char *attr = (char *)name;
722 namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
725 attr += namesp->attr_namelen;
726 error = namesp->attr_capable(vp, NULL);
730 /* Convert Linux syscall to XFS internal ATTR flags */
732 xflags |= ATTR_KERNOVAL;
735 xflags |= namesp->attr_flag;
736 return namesp->attr_get(vp, attr, (void *)data, size, xflags);
741 struct dentry *dentry,
745 bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
746 int error, xflags = ATTR_KERNAMELS;
750 xflags |= ATTR_KERNOVAL;
751 xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;
753 error = attr_generic_list(vp, data, size, xflags, &result);
761 struct dentry *dentry,
764 bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
765 char *attr = (char *)name;
770 namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
773 attr += namesp->attr_namelen;
774 error = namesp->attr_capable(vp, NULL);
777 xflags |= namesp->attr_flag;
778 return namesp->attr_remove(vp, attr, xflags);
782 const struct inode_operations xfs_inode_operations = {
783 .permission = xfs_vn_permission,
784 .truncate = xfs_vn_truncate,
785 .getattr = xfs_vn_getattr,
786 .setattr = xfs_vn_setattr,
787 .setxattr = xfs_vn_setxattr,
788 .getxattr = xfs_vn_getxattr,
789 .listxattr = xfs_vn_listxattr,
790 .removexattr = xfs_vn_removexattr,
793 const struct inode_operations xfs_dir_inode_operations = {
794 .create = xfs_vn_create,
795 .lookup = xfs_vn_lookup,
797 .unlink = xfs_vn_unlink,
798 .symlink = xfs_vn_symlink,
799 .mkdir = xfs_vn_mkdir,
800 .rmdir = xfs_vn_rmdir,
801 .mknod = xfs_vn_mknod,
802 .rename = xfs_vn_rename,
803 .permission = xfs_vn_permission,
804 .getattr = xfs_vn_getattr,
805 .setattr = xfs_vn_setattr,
806 .setxattr = xfs_vn_setxattr,
807 .getxattr = xfs_vn_getxattr,
808 .listxattr = xfs_vn_listxattr,
809 .removexattr = xfs_vn_removexattr,
812 const struct inode_operations xfs_symlink_inode_operations = {
813 .readlink = generic_readlink,
814 .follow_link = xfs_vn_follow_link,
815 .put_link = xfs_vn_put_link,
816 .permission = xfs_vn_permission,
817 .getattr = xfs_vn_getattr,
818 .setattr = xfs_vn_setattr,
819 .setxattr = xfs_vn_setxattr,
820 .getxattr = xfs_vn_getxattr,
821 .listxattr = xfs_vn_listxattr,
822 .removexattr = xfs_vn_removexattr,