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
24 #include "xfs_trans.h"
28 #include "xfs_alloc.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_quota.h"
31 #include "xfs_mount.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_ialloc_btree.h"
35 #include "xfs_dir2_sf.h"
36 #include "xfs_attr_sf.h"
37 #include "xfs_dinode.h"
38 #include "xfs_inode.h"
40 #include "xfs_btree.h"
41 #include "xfs_ialloc.h"
42 #include "xfs_rtalloc.h"
43 #include "xfs_error.h"
44 #include "xfs_itable.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_utils.h"
49 #include "xfs_vnodeops.h"
50 #include "xfs_trace.h"
52 #include <linux/capability.h>
53 #include <linux/xattr.h>
54 #include <linux/namei.h>
55 #include <linux/posix_acl.h>
56 #include <linux/security.h>
57 #include <linux/falloc.h>
58 #include <linux/fiemap.h>
59 #include <linux/slab.h>
62 * Bring the timestamps in the XFS inode uptodate.
64 * Used before writing the inode to disk.
67 xfs_synchronize_times(
70 struct inode *inode = VFS_I(ip);
72 ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
73 ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
74 ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec;
75 ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec;
76 ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec;
77 ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec;
81 * If the linux inode is valid, mark it dirty.
82 * Used when commiting a dirty inode into a transaction so that
83 * the inode will get written back by the linux code
86 xfs_mark_inode_dirty_sync(
89 struct inode *inode = VFS_I(ip);
91 if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR)))
92 mark_inode_dirty_sync(inode);
99 struct inode *inode = VFS_I(ip);
101 if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR)))
102 mark_inode_dirty(inode);
106 * Change the requested timestamp in the given inode.
107 * We don't lock across timestamp updates, and we don't log them but
108 * we do record the fact that there is dirty information in core.
115 struct inode *inode = VFS_I(ip);
119 tv = current_fs_time(inode->i_sb);
121 if ((flags & XFS_ICHGTIME_MOD) &&
122 !timespec_equal(&inode->i_mtime, &tv)) {
126 if ((flags & XFS_ICHGTIME_CHG) &&
127 !timespec_equal(&inode->i_ctime, &tv)) {
133 * Update complete - now make sure everyone knows that the inode
137 xfs_mark_inode_dirty_sync(ip);
141 * Hook in SELinux. This is not quite correct yet, what we really need
142 * here (as we do for default ACLs) is a mechanism by which creation of
143 * these attrs can be journalled at inode creation time (along with the
144 * inode, of course, such that log replay can't cause these to be lost).
151 struct xfs_inode *ip = XFS_I(inode);
157 error = security_inode_init_security(inode, dir, (char **)&name,
160 if (error == -EOPNOTSUPP)
165 error = xfs_attr_set(ip, name, value, length, ATTR_SECURE);
174 struct xfs_name *namep,
175 struct dentry *dentry)
177 namep->name = dentry->d_name.name;
178 namep->len = dentry->d_name.len;
185 struct dentry *dentry)
187 struct xfs_name teardown;
190 * If we can't add the ACL or we fail in
191 * xfs_init_security we must back out.
192 * ENOSPC can hit here, among other things.
194 xfs_dentry_to_name(&teardown, dentry);
196 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
203 struct dentry *dentry,
208 struct xfs_inode *ip = NULL;
209 struct posix_acl *default_acl = NULL;
210 struct xfs_name name;
214 * Irix uses Missed'em'V split, but doesn't want to see
215 * the upper 5 bits of (14bit) major.
217 if (S_ISCHR(mode) || S_ISBLK(mode)) {
218 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
220 rdev = sysv_encode_dev(rdev);
225 if (IS_POSIXACL(dir)) {
226 default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
227 if (IS_ERR(default_acl))
228 return -PTR_ERR(default_acl);
231 mode &= ~current_umask();
234 xfs_dentry_to_name(&name, dentry);
235 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL);
241 error = xfs_init_security(inode, dir);
243 goto out_cleanup_inode;
246 error = -xfs_inherit_acl(inode, default_acl);
248 goto out_cleanup_inode;
249 posix_acl_release(default_acl);
253 d_instantiate(dentry, inode);
257 xfs_cleanup_inode(dir, inode, dentry);
259 posix_acl_release(default_acl);
266 struct dentry *dentry,
268 struct nameidata *nd)
270 return xfs_vn_mknod(dir, dentry, mode, 0);
276 struct dentry *dentry,
279 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
282 STATIC struct dentry *
285 struct dentry *dentry,
286 struct nameidata *nd)
288 struct xfs_inode *cip;
289 struct xfs_name name;
292 if (dentry->d_name.len >= MAXNAMELEN)
293 return ERR_PTR(-ENAMETOOLONG);
295 xfs_dentry_to_name(&name, dentry);
296 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
297 if (unlikely(error)) {
298 if (unlikely(error != ENOENT))
299 return ERR_PTR(-error);
304 return d_splice_alias(VFS_I(cip), dentry);
307 STATIC struct dentry *
310 struct dentry *dentry,
311 struct nameidata *nd)
313 struct xfs_inode *ip;
314 struct xfs_name xname;
315 struct xfs_name ci_name;
319 if (dentry->d_name.len >= MAXNAMELEN)
320 return ERR_PTR(-ENAMETOOLONG);
322 xfs_dentry_to_name(&xname, dentry);
323 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
324 if (unlikely(error)) {
325 if (unlikely(error != ENOENT))
326 return ERR_PTR(-error);
328 * call d_add(dentry, NULL) here when d_drop_negative_children
329 * is called in xfs_vn_mknod (ie. allow negative dentries
330 * with CI filesystems).
335 /* if exact match, just splice and exit */
337 return d_splice_alias(VFS_I(ip), dentry);
339 /* else case-insensitive match... */
340 dname.name = ci_name.name;
341 dname.len = ci_name.len;
342 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
343 kmem_free(ci_name.name);
349 struct dentry *old_dentry,
351 struct dentry *dentry)
353 struct inode *inode = old_dentry->d_inode;
354 struct xfs_name name;
357 xfs_dentry_to_name(&name, dentry);
359 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
363 atomic_inc(&inode->i_count);
364 d_instantiate(dentry, inode);
371 struct dentry *dentry)
373 struct xfs_name name;
376 xfs_dentry_to_name(&name, dentry);
378 error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
383 * With unlink, the VFS makes the dentry "negative": no inode,
384 * but still hashed. This is incompatible with case-insensitive
385 * mode, so invalidate (unhash) the dentry in CI-mode.
387 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
388 d_invalidate(dentry);
395 struct dentry *dentry,
399 struct xfs_inode *cip = NULL;
400 struct xfs_name name;
405 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
406 xfs_dentry_to_name(&name, dentry);
408 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL);
414 error = xfs_init_security(inode, dir);
416 goto out_cleanup_inode;
418 d_instantiate(dentry, inode);
422 xfs_cleanup_inode(dir, inode, dentry);
430 struct dentry *odentry,
432 struct dentry *ndentry)
434 struct inode *new_inode = ndentry->d_inode;
435 struct xfs_name oname;
436 struct xfs_name nname;
438 xfs_dentry_to_name(&oname, odentry);
439 xfs_dentry_to_name(&nname, ndentry);
441 return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
442 XFS_I(ndir), &nname, new_inode ?
443 XFS_I(new_inode) : NULL);
447 * careful here - this function can get called recursively, so
448 * we need to be very careful about how much stack we use.
449 * uio is kmalloced for this reason...
453 struct dentry *dentry,
454 struct nameidata *nd)
459 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
463 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
467 nd_set_link(nd, link);
473 nd_set_link(nd, ERR_PTR(error));
479 struct dentry *dentry,
480 struct nameidata *nd,
483 char *s = nd_get_link(nd);
491 struct vfsmount *mnt,
492 struct dentry *dentry,
495 struct inode *inode = dentry->d_inode;
496 struct xfs_inode *ip = XFS_I(inode);
497 struct xfs_mount *mp = ip->i_mount;
499 xfs_itrace_entry(ip);
501 if (XFS_FORCED_SHUTDOWN(mp))
502 return XFS_ERROR(EIO);
504 stat->size = XFS_ISIZE(ip);
505 stat->dev = inode->i_sb->s_dev;
506 stat->mode = ip->i_d.di_mode;
507 stat->nlink = ip->i_d.di_nlink;
508 stat->uid = ip->i_d.di_uid;
509 stat->gid = ip->i_d.di_gid;
510 stat->ino = ip->i_ino;
511 stat->atime = inode->i_atime;
512 stat->mtime = inode->i_mtime;
513 stat->ctime = inode->i_ctime;
515 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
518 switch (inode->i_mode & S_IFMT) {
521 stat->blksize = BLKDEV_IOSIZE;
522 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
523 sysv_minor(ip->i_df.if_u2.if_rdev));
526 if (XFS_IS_REALTIME_INODE(ip)) {
528 * If the file blocks are being allocated from a
529 * realtime volume, then return the inode's realtime
530 * extent size or the realtime volume's extent size.
533 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
535 stat->blksize = xfs_preferred_iosize(mp);
545 struct dentry *dentry,
548 return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0);
552 * block_truncate_page can return an error, but we can't propagate it
553 * at all here. Leave a complaint + stack trace in the syslog because
554 * this could be bad. If it is bad, we need to propagate the error further.
561 error = block_truncate_page(inode->i_mapping, inode->i_size,
576 xfs_inode_t *ip = XFS_I(inode);
578 /* preallocation on directories not yet supported */
580 if (S_ISDIR(inode->i_mode))
587 xfs_ilock(ip, XFS_IOLOCK_EXCL);
588 error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
590 if (!error && !(mode & FALLOC_FL_KEEP_SIZE) &&
591 offset + len > i_size_read(inode))
592 new_size = offset + len;
594 /* Change file size if needed */
598 iattr.ia_valid = ATTR_SIZE;
599 iattr.ia_size = new_size;
600 error = -xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK);
603 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
608 #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
611 * Call fiemap helper to fill in user data.
612 * Returns positive errors to xfs_getbmap.
617 struct getbmapx *bmv,
621 struct fiemap_extent_info *fieinfo = *arg;
622 u32 fiemap_flags = 0;
623 u64 logical, physical, length;
625 /* Do nothing for a hole */
626 if (bmv->bmv_block == -1LL)
629 logical = BBTOB(bmv->bmv_offset);
630 physical = BBTOB(bmv->bmv_block);
631 length = BBTOB(bmv->bmv_length);
633 if (bmv->bmv_oflags & BMV_OF_PREALLOC)
634 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
635 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
636 fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
637 physical = 0; /* no block yet */
639 if (bmv->bmv_oflags & BMV_OF_LAST)
640 fiemap_flags |= FIEMAP_EXTENT_LAST;
642 error = fiemap_fill_next_extent(fieinfo, logical, physical,
643 length, fiemap_flags);
646 *full = 1; /* user array now full */
655 struct fiemap_extent_info *fieinfo,
659 xfs_inode_t *ip = XFS_I(inode);
663 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
667 /* Set up bmap header for xfs internal routine */
668 bm.bmv_offset = BTOBB(start);
669 /* Special case for whole file */
670 if (length == FIEMAP_MAX_OFFSET)
671 bm.bmv_length = -1LL;
673 bm.bmv_length = BTOBB(length);
675 /* We add one because in getbmap world count includes the header */
676 bm.bmv_count = fieinfo->fi_extents_max + 1;
677 bm.bmv_iflags = BMV_IF_PREALLOC;
678 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
679 bm.bmv_iflags |= BMV_IF_ATTRFORK;
680 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
681 bm.bmv_iflags |= BMV_IF_DELALLOC;
683 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
690 static const struct inode_operations xfs_inode_operations = {
691 .check_acl = xfs_check_acl,
692 .truncate = xfs_vn_truncate,
693 .getattr = xfs_vn_getattr,
694 .setattr = xfs_vn_setattr,
695 .setxattr = generic_setxattr,
696 .getxattr = generic_getxattr,
697 .removexattr = generic_removexattr,
698 .listxattr = xfs_vn_listxattr,
699 .fallocate = xfs_vn_fallocate,
700 .fiemap = xfs_vn_fiemap,
703 static const struct inode_operations xfs_dir_inode_operations = {
704 .create = xfs_vn_create,
705 .lookup = xfs_vn_lookup,
707 .unlink = xfs_vn_unlink,
708 .symlink = xfs_vn_symlink,
709 .mkdir = xfs_vn_mkdir,
711 * Yes, XFS uses the same method for rmdir and unlink.
713 * There are some subtile differences deeper in the code,
714 * but we use S_ISDIR to check for those.
716 .rmdir = xfs_vn_unlink,
717 .mknod = xfs_vn_mknod,
718 .rename = xfs_vn_rename,
719 .check_acl = xfs_check_acl,
720 .getattr = xfs_vn_getattr,
721 .setattr = xfs_vn_setattr,
722 .setxattr = generic_setxattr,
723 .getxattr = generic_getxattr,
724 .removexattr = generic_removexattr,
725 .listxattr = xfs_vn_listxattr,
728 static const struct inode_operations xfs_dir_ci_inode_operations = {
729 .create = xfs_vn_create,
730 .lookup = xfs_vn_ci_lookup,
732 .unlink = xfs_vn_unlink,
733 .symlink = xfs_vn_symlink,
734 .mkdir = xfs_vn_mkdir,
736 * Yes, XFS uses the same method for rmdir and unlink.
738 * There are some subtile differences deeper in the code,
739 * but we use S_ISDIR to check for those.
741 .rmdir = xfs_vn_unlink,
742 .mknod = xfs_vn_mknod,
743 .rename = xfs_vn_rename,
744 .check_acl = xfs_check_acl,
745 .getattr = xfs_vn_getattr,
746 .setattr = xfs_vn_setattr,
747 .setxattr = generic_setxattr,
748 .getxattr = generic_getxattr,
749 .removexattr = generic_removexattr,
750 .listxattr = xfs_vn_listxattr,
753 static const struct inode_operations xfs_symlink_inode_operations = {
754 .readlink = generic_readlink,
755 .follow_link = xfs_vn_follow_link,
756 .put_link = xfs_vn_put_link,
757 .check_acl = xfs_check_acl,
758 .getattr = xfs_vn_getattr,
759 .setattr = xfs_vn_setattr,
760 .setxattr = generic_setxattr,
761 .getxattr = generic_getxattr,
762 .removexattr = generic_removexattr,
763 .listxattr = xfs_vn_listxattr,
767 xfs_diflags_to_iflags(
769 struct xfs_inode *ip)
771 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
772 inode->i_flags |= S_IMMUTABLE;
774 inode->i_flags &= ~S_IMMUTABLE;
775 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
776 inode->i_flags |= S_APPEND;
778 inode->i_flags &= ~S_APPEND;
779 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
780 inode->i_flags |= S_SYNC;
782 inode->i_flags &= ~S_SYNC;
783 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
784 inode->i_flags |= S_NOATIME;
786 inode->i_flags &= ~S_NOATIME;
790 * Initialize the Linux inode, set up the operation vectors and
793 * When reading existing inodes from disk this is called directly
794 * from xfs_iget, when creating a new inode it is called from
795 * xfs_ialloc after setting up the inode.
797 * We are always called with an uninitialised linux inode here.
798 * We need to initialise the necessary fields and take a reference
803 struct xfs_inode *ip)
805 struct inode *inode = &ip->i_vnode;
807 inode->i_ino = ip->i_ino;
808 inode->i_state = I_NEW;
809 inode_add_to_lists(ip->i_mount->m_super, inode);
811 inode->i_mode = ip->i_d.di_mode;
812 inode->i_nlink = ip->i_d.di_nlink;
813 inode->i_uid = ip->i_d.di_uid;
814 inode->i_gid = ip->i_d.di_gid;
816 switch (inode->i_mode & S_IFMT) {
820 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
821 sysv_minor(ip->i_df.if_u2.if_rdev));
828 inode->i_generation = ip->i_d.di_gen;
829 i_size_write(inode, ip->i_d.di_size);
830 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
831 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
832 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
833 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
834 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
835 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
836 xfs_diflags_to_iflags(inode, ip);
838 switch (inode->i_mode & S_IFMT) {
840 inode->i_op = &xfs_inode_operations;
841 inode->i_fop = &xfs_file_operations;
842 inode->i_mapping->a_ops = &xfs_address_space_operations;
845 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
846 inode->i_op = &xfs_dir_ci_inode_operations;
848 inode->i_op = &xfs_dir_inode_operations;
849 inode->i_fop = &xfs_dir_file_operations;
852 inode->i_op = &xfs_symlink_inode_operations;
853 if (!(ip->i_df.if_flags & XFS_IFINLINE))
854 inode->i_mapping->a_ops = &xfs_address_space_operations;
857 inode->i_op = &xfs_inode_operations;
858 init_special_inode(inode, inode->i_mode, inode->i_rdev);
862 xfs_iflags_clear(ip, XFS_INEW);
865 unlock_new_inode(inode);