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>
55 #include <linux/falloc.h>
58 * Bring the atime in the XFS inode uptodate.
59 * Used before logging the inode to disk or when the Linux inode goes away.
62 xfs_synchronize_atime(
67 vp = XFS_ITOV_NULL(ip);
69 ip->i_d.di_atime.t_sec = (__int32_t)vp->i_atime.tv_sec;
70 ip->i_d.di_atime.t_nsec = (__int32_t)vp->i_atime.tv_nsec;
75 * If the linux inode exists, mark it dirty.
76 * Used when commiting a dirty inode into a transaction so that
77 * the inode will get written back by the linux code
80 xfs_mark_inode_dirty_sync(
85 vp = XFS_ITOV_NULL(ip);
87 mark_inode_dirty_sync(vn_to_inode(vp));
91 * Change the requested timestamp in the given inode.
92 * We don't lock across timestamp updates, and we don't log them but
93 * we do record the fact that there is dirty information in core.
95 * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG
96 * with XFS_ICHGTIME_ACC to be sure that access time
97 * update will take. Calling first with XFS_ICHGTIME_ACC
98 * and then XFS_ICHGTIME_MOD may fail to modify the access
99 * timestamp if the filesystem is mounted noacctm.
106 struct inode *inode = vn_to_inode(XFS_ITOV(ip));
110 if (flags & XFS_ICHGTIME_MOD) {
112 ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
113 ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
115 if (flags & XFS_ICHGTIME_ACC) {
117 ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec;
118 ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec;
120 if (flags & XFS_ICHGTIME_CHG) {
122 ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
123 ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
127 * We update the i_update_core field _after_ changing
128 * the timestamps in order to coordinate properly with
129 * xfs_iflush() so that we don't lose timestamp updates.
130 * This keeps us from having to hold the inode lock
131 * while doing this. We use the SYNCHRONIZE macro to
132 * ensure that the compiler does not reorder the update
133 * of i_update_core above the timestamp updates above.
136 ip->i_update_core = 1;
137 if (!(inode->i_state & I_NEW))
138 mark_inode_dirty_sync(inode);
142 * Variant on the above which avoids querying the system clock
143 * in situations where we know the Linux inode timestamps have
144 * just been updated (and so we can update our inode cheaply).
155 * Atime updates for read() & friends are handled lazily now, and
156 * explicit updates must go through xfs_ichgtime()
158 ASSERT((flags & XFS_ICHGTIME_ACC) == 0);
161 * We're not supposed to change timestamps in readonly-mounted
162 * filesystems. Throw it away if anyone asks us.
164 if (unlikely(IS_RDONLY(inode)))
167 if (flags & XFS_ICHGTIME_MOD) {
168 tvp = &inode->i_mtime;
169 ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec;
170 ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec;
172 if (flags & XFS_ICHGTIME_CHG) {
173 tvp = &inode->i_ctime;
174 ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec;
175 ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec;
179 * We update the i_update_core field _after_ changing
180 * the timestamps in order to coordinate properly with
181 * xfs_iflush() so that we don't lose timestamp updates.
182 * This keeps us from having to hold the inode lock
183 * while doing this. We use the SYNCHRONIZE macro to
184 * ensure that the compiler does not reorder the update
185 * of i_update_core above the timestamp updates above.
188 ip->i_update_core = 1;
189 if (!(inode->i_state & I_NEW))
190 mark_inode_dirty_sync(inode);
195 * Pull the link count and size up from the xfs inode to the linux inode
201 struct xfs_inode *ip = XFS_I(inode);
204 /* we're under i_sem so i_size can't change under us */
205 size = XFS_ISIZE(ip);
206 if (i_size_read(inode) != size)
207 i_size_write(inode, size);
211 * Hook in SELinux. This is not quite correct yet, what we really need
212 * here (as we do for default ACLs) is a mechanism by which creation of
213 * these attrs can be journalled at inode creation time (along with the
214 * inode, of course, such that log replay can't cause these to be lost).
221 struct inode *ip = vn_to_inode(vp);
227 error = security_inode_init_security(ip, dir, &name, &value, &length);
229 if (error == -EOPNOTSUPP)
234 error = xfs_attr_set(XFS_I(ip), name, value,
235 length, ATTR_SECURE);
237 xfs_iflags_set(XFS_I(ip), XFS_IMODIFIED);
245 * Determine whether a process has a valid fs_struct (kernel daemons
246 * like knfsd don't have an fs_struct).
248 * XXX(hch): nfsd is broken, better fix it instead.
251 xfs_has_fs_struct(struct task_struct *task)
253 return (task->fs != init_task.fs);
260 struct dentry *dentry,
263 struct dentry teardown = {};
266 * If we can't add the ACL or we fail in
267 * xfs_init_security we must back out.
268 * ENOSPC can hit here, among other things.
270 teardown.d_inode = vn_to_inode(vp);
271 teardown.d_name = dentry->d_name;
274 xfs_rmdir(XFS_I(dir), &teardown);
276 xfs_remove(XFS_I(dir), &teardown);
283 struct dentry *dentry,
288 bhv_vnode_t *vp = NULL, *dvp = vn_from_inode(dir);
289 xfs_acl_t *default_acl = NULL;
290 attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS;
294 * Irix uses Missed'em'V split, but doesn't want to see
295 * the upper 5 bits of (14bit) major.
297 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
300 if (unlikely(test_default_acl && test_default_acl(dvp))) {
301 if (!_ACL_ALLOC(default_acl)) {
304 if (!_ACL_GET_DEFAULT(dvp, default_acl)) {
305 _ACL_FREE(default_acl);
310 if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current))
311 mode &= ~current->fs->umask;
313 switch (mode & S_IFMT) {
314 case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
315 rdev = sysv_encode_dev(rdev);
317 error = xfs_create(XFS_I(dir), dentry, mode, rdev, &vp, NULL);
320 error = xfs_mkdir(XFS_I(dir), dentry, mode, &vp, NULL);
327 if (unlikely(!error)) {
328 error = xfs_init_security(vp, dir);
330 xfs_cleanup_inode(dir, vp, dentry, mode);
333 if (unlikely(default_acl)) {
335 error = _ACL_INHERIT(vp, mode, default_acl);
337 xfs_iflags_set(XFS_I(vp), XFS_IMODIFIED);
339 xfs_cleanup_inode(dir, vp, dentry, mode);
341 _ACL_FREE(default_acl);
344 if (likely(!error)) {
346 ip = vn_to_inode(vp);
349 xfs_validate_fields(ip);
350 d_instantiate(dentry, ip);
351 xfs_validate_fields(dir);
359 struct dentry *dentry,
361 struct nameidata *nd)
363 return xfs_vn_mknod(dir, dentry, mode, 0);
369 struct dentry *dentry,
372 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
375 STATIC struct dentry *
378 struct dentry *dentry,
379 struct nameidata *nd)
384 if (dentry->d_name.len >= MAXNAMELEN)
385 return ERR_PTR(-ENAMETOOLONG);
387 error = xfs_lookup(XFS_I(dir), dentry, &cvp);
388 if (unlikely(error)) {
389 if (unlikely(error != ENOENT))
390 return ERR_PTR(-error);
395 return d_splice_alias(vn_to_inode(cvp), dentry);
400 struct dentry *old_dentry,
402 struct dentry *dentry)
404 struct inode *ip; /* inode of guy being linked to */
405 bhv_vnode_t *vp; /* vp of name being linked */
408 ip = old_dentry->d_inode; /* inode being linked to */
409 vp = vn_from_inode(ip);
412 error = xfs_link(XFS_I(dir), vp, dentry);
413 if (unlikely(error)) {
416 xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED);
417 xfs_validate_fields(ip);
418 d_instantiate(dentry, ip);
426 struct dentry *dentry)
431 inode = dentry->d_inode;
433 error = xfs_remove(XFS_I(dir), dentry);
434 if (likely(!error)) {
435 xfs_validate_fields(dir); /* size needs update */
436 xfs_validate_fields(inode);
444 struct dentry *dentry,
448 bhv_vnode_t *cvp; /* used to lookup symlink to put in dentry */
455 (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
457 error = xfs_symlink(XFS_I(dir), dentry, (char *)symname, mode,
459 if (likely(!error && cvp)) {
460 error = xfs_init_security(cvp, dir);
461 if (likely(!error)) {
462 ip = vn_to_inode(cvp);
463 d_instantiate(dentry, ip);
464 xfs_validate_fields(dir);
465 xfs_validate_fields(ip);
467 xfs_cleanup_inode(dir, cvp, dentry, 0);
476 struct dentry *dentry)
478 struct inode *inode = dentry->d_inode;
481 error = xfs_rmdir(XFS_I(dir), dentry);
482 if (likely(!error)) {
483 xfs_validate_fields(inode);
484 xfs_validate_fields(dir);
492 struct dentry *odentry,
494 struct dentry *ndentry)
496 struct inode *new_inode = ndentry->d_inode;
497 bhv_vnode_t *tvp; /* target directory */
500 tvp = vn_from_inode(ndir);
502 error = xfs_rename(XFS_I(odir), odentry, tvp, ndentry);
503 if (likely(!error)) {
505 xfs_validate_fields(new_inode);
506 xfs_validate_fields(odir);
508 xfs_validate_fields(ndir);
514 * careful here - this function can get called recursively, so
515 * we need to be very careful about how much stack we use.
516 * uio is kmalloced for this reason...
520 struct dentry *dentry,
521 struct nameidata *nd)
526 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
530 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
534 nd_set_link(nd, link);
540 nd_set_link(nd, ERR_PTR(error));
546 struct dentry *dentry,
547 struct nameidata *nd,
550 char *s = nd_get_link(nd);
556 #ifdef CONFIG_XFS_POSIX_ACL
562 struct xfs_inode *ip = XFS_I(inode);
565 xfs_itrace_entry(ip);
567 if (XFS_IFORK_Q(ip)) {
568 error = xfs_acl_iaccess(ip, mask, NULL);
580 struct nameidata *nd)
582 return generic_permission(inode, mask, xfs_check_acl);
585 #define xfs_vn_permission NULL
590 struct vfsmount *mnt,
591 struct dentry *dentry,
594 struct inode *inode = dentry->d_inode;
595 struct xfs_inode *ip = XFS_I(inode);
596 struct xfs_mount *mp = ip->i_mount;
598 xfs_itrace_entry(ip);
600 if (XFS_FORCED_SHUTDOWN(mp))
601 return XFS_ERROR(EIO);
603 stat->size = XFS_ISIZE(ip);
604 stat->dev = inode->i_sb->s_dev;
605 stat->mode = ip->i_d.di_mode;
606 stat->nlink = ip->i_d.di_nlink;
607 stat->uid = ip->i_d.di_uid;
608 stat->gid = ip->i_d.di_gid;
609 stat->ino = ip->i_ino;
611 stat->ino += mp->m_inoadd;
613 stat->atime = inode->i_atime;
614 stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec;
615 stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
616 stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec;
617 stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
619 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
622 switch (inode->i_mode & S_IFMT) {
625 stat->blksize = BLKDEV_IOSIZE;
626 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
627 sysv_minor(ip->i_df.if_u2.if_rdev));
630 if (XFS_IS_REALTIME_INODE(ip)) {
632 * If the file blocks are being allocated from a
633 * realtime volume, then return the inode's realtime
634 * extent size or the realtime volume's extent size.
637 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
639 stat->blksize = xfs_preferred_iosize(mp);
649 struct dentry *dentry,
652 struct inode *inode = dentry->d_inode;
653 unsigned int ia_valid = attr->ia_valid;
654 bhv_vattr_t vattr = { 0 };
658 if (ia_valid & ATTR_UID) {
659 vattr.va_mask |= XFS_AT_UID;
660 vattr.va_uid = attr->ia_uid;
662 if (ia_valid & ATTR_GID) {
663 vattr.va_mask |= XFS_AT_GID;
664 vattr.va_gid = attr->ia_gid;
666 if (ia_valid & ATTR_SIZE) {
667 vattr.va_mask |= XFS_AT_SIZE;
668 vattr.va_size = attr->ia_size;
670 if (ia_valid & ATTR_ATIME) {
671 vattr.va_mask |= XFS_AT_ATIME;
672 vattr.va_atime = attr->ia_atime;
673 inode->i_atime = attr->ia_atime;
675 if (ia_valid & ATTR_MTIME) {
676 vattr.va_mask |= XFS_AT_MTIME;
677 vattr.va_mtime = attr->ia_mtime;
679 if (ia_valid & ATTR_CTIME) {
680 vattr.va_mask |= XFS_AT_CTIME;
681 vattr.va_ctime = attr->ia_ctime;
683 if (ia_valid & ATTR_MODE) {
684 vattr.va_mask |= XFS_AT_MODE;
685 vattr.va_mode = attr->ia_mode;
686 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
687 inode->i_mode &= ~S_ISGID;
690 if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
693 if ((ia_valid & ATTR_NO_BLOCK))
694 flags |= ATTR_NONBLOCK;
697 error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL);
699 vn_revalidate(vn_from_inode(inode));
707 block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks);
712 struct dentry *dentry,
718 bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
719 char *attr = (char *)name;
724 namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
727 attr += namesp->attr_namelen;
728 error = namesp->attr_capable(vp, NULL);
732 /* Convert Linux syscall to XFS internal ATTR flags */
733 if (flags & XATTR_CREATE)
734 xflags |= ATTR_CREATE;
735 if (flags & XATTR_REPLACE)
736 xflags |= ATTR_REPLACE;
737 xflags |= namesp->attr_flag;
738 return namesp->attr_set(vp, attr, (void *)data, size, xflags);
743 struct dentry *dentry,
748 bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
749 char *attr = (char *)name;
754 namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
757 attr += namesp->attr_namelen;
758 error = namesp->attr_capable(vp, NULL);
762 /* Convert Linux syscall to XFS internal ATTR flags */
764 xflags |= ATTR_KERNOVAL;
767 xflags |= namesp->attr_flag;
768 return namesp->attr_get(vp, attr, (void *)data, size, xflags);
773 struct dentry *dentry,
777 bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
778 int error, xflags = ATTR_KERNAMELS;
782 xflags |= ATTR_KERNOVAL;
783 xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;
785 error = attr_generic_list(vp, data, size, xflags, &result);
793 struct dentry *dentry,
796 bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
797 char *attr = (char *)name;
802 namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
805 attr += namesp->attr_namelen;
806 error = namesp->attr_capable(vp, NULL);
809 xflags |= namesp->attr_flag;
810 return namesp->attr_remove(vp, attr, xflags);
823 xfs_inode_t *ip = XFS_I(inode);
825 /* preallocation on directories not yet supported */
827 if (S_ISDIR(inode->i_mode))
834 xfs_ilock(ip, XFS_IOLOCK_EXCL);
835 error = xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
836 0, NULL, ATTR_NOLOCK);
837 if (!error && !(mode & FALLOC_FL_KEEP_SIZE) &&
838 offset + len > i_size_read(inode))
839 new_size = offset + len;
841 /* Change file size if needed */
845 va.va_mask = XFS_AT_SIZE;
846 va.va_size = new_size;
847 error = xfs_setattr(ip, &va, ATTR_NOLOCK, NULL);
850 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
855 const struct inode_operations xfs_inode_operations = {
856 .permission = xfs_vn_permission,
857 .truncate = xfs_vn_truncate,
858 .getattr = xfs_vn_getattr,
859 .setattr = xfs_vn_setattr,
860 .setxattr = xfs_vn_setxattr,
861 .getxattr = xfs_vn_getxattr,
862 .listxattr = xfs_vn_listxattr,
863 .removexattr = xfs_vn_removexattr,
864 .fallocate = xfs_vn_fallocate,
867 const struct inode_operations xfs_dir_inode_operations = {
868 .create = xfs_vn_create,
869 .lookup = xfs_vn_lookup,
871 .unlink = xfs_vn_unlink,
872 .symlink = xfs_vn_symlink,
873 .mkdir = xfs_vn_mkdir,
874 .rmdir = xfs_vn_rmdir,
875 .mknod = xfs_vn_mknod,
876 .rename = xfs_vn_rename,
877 .permission = xfs_vn_permission,
878 .getattr = xfs_vn_getattr,
879 .setattr = xfs_vn_setattr,
880 .setxattr = xfs_vn_setxattr,
881 .getxattr = xfs_vn_getxattr,
882 .listxattr = xfs_vn_listxattr,
883 .removexattr = xfs_vn_removexattr,
886 const struct inode_operations xfs_symlink_inode_operations = {
887 .readlink = generic_readlink,
888 .follow_link = xfs_vn_follow_link,
889 .put_link = xfs_vn_put_link,
890 .permission = xfs_vn_permission,
891 .getattr = xfs_vn_getattr,
892 .setattr = xfs_vn_setattr,
893 .setxattr = xfs_vn_setxattr,
894 .getxattr = xfs_vn_getxattr,
895 .listxattr = xfs_vn_listxattr,
896 .removexattr = xfs_vn_removexattr,