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"
27 #include "xfs_alloc.h"
28 #include "xfs_quota.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_dinode.h"
32 #include "xfs_inode.h"
34 #include "xfs_rtalloc.h"
35 #include "xfs_error.h"
36 #include "xfs_itable.h"
39 #include "xfs_buf_item.h"
40 #include "xfs_utils.h"
41 #include "xfs_vnodeops.h"
42 #include "xfs_trace.h"
44 #include <linux/capability.h>
45 #include <linux/xattr.h>
46 #include <linux/namei.h>
47 #include <linux/posix_acl.h>
48 #include <linux/security.h>
49 #include <linux/falloc.h>
50 #include <linux/fiemap.h>
51 #include <linux/slab.h>
54 * Bring the timestamps in the XFS inode uptodate.
56 * Used before writing the inode to disk.
59 xfs_synchronize_times(
62 struct inode *inode = VFS_I(ip);
64 ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
65 ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
66 ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec;
67 ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec;
68 ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec;
69 ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec;
73 * If the linux inode is valid, mark it dirty.
74 * Used when commiting a dirty inode into a transaction so that
75 * the inode will get written back by the linux code
78 xfs_mark_inode_dirty_sync(
81 struct inode *inode = VFS_I(ip);
83 if (!(inode->i_state & (I_WILL_FREE|I_FREEING)))
84 mark_inode_dirty_sync(inode);
91 struct inode *inode = VFS_I(ip);
93 if (!(inode->i_state & (I_WILL_FREE|I_FREEING)))
94 mark_inode_dirty(inode);
98 * Change the requested timestamp in the given inode.
99 * We don't lock across timestamp updates, and we don't log them but
100 * we do record the fact that there is dirty information in core.
107 struct inode *inode = VFS_I(ip);
111 tv = current_fs_time(inode->i_sb);
113 if ((flags & XFS_ICHGTIME_MOD) &&
114 !timespec_equal(&inode->i_mtime, &tv)) {
118 if ((flags & XFS_ICHGTIME_CHG) &&
119 !timespec_equal(&inode->i_ctime, &tv)) {
125 * Update complete - now make sure everyone knows that the inode
129 xfs_mark_inode_dirty_sync(ip);
133 * Hook in SELinux. This is not quite correct yet, what we really need
134 * here (as we do for default ACLs) is a mechanism by which creation of
135 * these attrs can be journalled at inode creation time (along with the
136 * inode, of course, such that log replay can't cause these to be lost).
143 struct xfs_inode *ip = XFS_I(inode);
149 error = security_inode_init_security(inode, dir, (char **)&name,
152 if (error == -EOPNOTSUPP)
157 error = xfs_attr_set(ip, name, value, length, ATTR_SECURE);
166 struct xfs_name *namep,
167 struct dentry *dentry)
169 namep->name = dentry->d_name.name;
170 namep->len = dentry->d_name.len;
177 struct dentry *dentry)
179 struct xfs_name teardown;
182 * If we can't add the ACL or we fail in
183 * xfs_init_security we must back out.
184 * ENOSPC can hit here, among other things.
186 xfs_dentry_to_name(&teardown, dentry);
188 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
195 struct dentry *dentry,
200 struct xfs_inode *ip = NULL;
201 struct posix_acl *default_acl = NULL;
202 struct xfs_name name;
206 * Irix uses Missed'em'V split, but doesn't want to see
207 * the upper 5 bits of (14bit) major.
209 if (S_ISCHR(mode) || S_ISBLK(mode)) {
210 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
212 rdev = sysv_encode_dev(rdev);
217 if (IS_POSIXACL(dir)) {
218 default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
219 if (IS_ERR(default_acl))
220 return -PTR_ERR(default_acl);
223 mode &= ~current_umask();
226 xfs_dentry_to_name(&name, dentry);
227 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL);
233 error = xfs_init_security(inode, dir);
235 goto out_cleanup_inode;
238 error = -xfs_inherit_acl(inode, default_acl);
240 goto out_cleanup_inode;
241 posix_acl_release(default_acl);
245 d_instantiate(dentry, inode);
249 xfs_cleanup_inode(dir, inode, dentry);
251 posix_acl_release(default_acl);
258 struct dentry *dentry,
260 struct nameidata *nd)
262 return xfs_vn_mknod(dir, dentry, mode, 0);
268 struct dentry *dentry,
271 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
274 STATIC struct dentry *
277 struct dentry *dentry,
278 struct nameidata *nd)
280 struct xfs_inode *cip;
281 struct xfs_name name;
284 if (dentry->d_name.len >= MAXNAMELEN)
285 return ERR_PTR(-ENAMETOOLONG);
287 xfs_dentry_to_name(&name, dentry);
288 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
289 if (unlikely(error)) {
290 if (unlikely(error != ENOENT))
291 return ERR_PTR(-error);
296 return d_splice_alias(VFS_I(cip), dentry);
299 STATIC struct dentry *
302 struct dentry *dentry,
303 struct nameidata *nd)
305 struct xfs_inode *ip;
306 struct xfs_name xname;
307 struct xfs_name ci_name;
311 if (dentry->d_name.len >= MAXNAMELEN)
312 return ERR_PTR(-ENAMETOOLONG);
314 xfs_dentry_to_name(&xname, dentry);
315 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
316 if (unlikely(error)) {
317 if (unlikely(error != ENOENT))
318 return ERR_PTR(-error);
320 * call d_add(dentry, NULL) here when d_drop_negative_children
321 * is called in xfs_vn_mknod (ie. allow negative dentries
322 * with CI filesystems).
327 /* if exact match, just splice and exit */
329 return d_splice_alias(VFS_I(ip), dentry);
331 /* else case-insensitive match... */
332 dname.name = ci_name.name;
333 dname.len = ci_name.len;
334 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
335 kmem_free(ci_name.name);
341 struct dentry *old_dentry,
343 struct dentry *dentry)
345 struct inode *inode = old_dentry->d_inode;
346 struct xfs_name name;
349 xfs_dentry_to_name(&name, dentry);
351 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
355 atomic_inc(&inode->i_count);
356 d_instantiate(dentry, inode);
363 struct dentry *dentry)
365 struct xfs_name name;
368 xfs_dentry_to_name(&name, dentry);
370 error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
375 * With unlink, the VFS makes the dentry "negative": no inode,
376 * but still hashed. This is incompatible with case-insensitive
377 * mode, so invalidate (unhash) the dentry in CI-mode.
379 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
380 d_invalidate(dentry);
387 struct dentry *dentry,
391 struct xfs_inode *cip = NULL;
392 struct xfs_name name;
397 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
398 xfs_dentry_to_name(&name, dentry);
400 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL);
406 error = xfs_init_security(inode, dir);
408 goto out_cleanup_inode;
410 d_instantiate(dentry, inode);
414 xfs_cleanup_inode(dir, inode, dentry);
422 struct dentry *odentry,
424 struct dentry *ndentry)
426 struct inode *new_inode = ndentry->d_inode;
427 struct xfs_name oname;
428 struct xfs_name nname;
430 xfs_dentry_to_name(&oname, odentry);
431 xfs_dentry_to_name(&nname, ndentry);
433 return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
434 XFS_I(ndir), &nname, new_inode ?
435 XFS_I(new_inode) : NULL);
439 * careful here - this function can get called recursively, so
440 * we need to be very careful about how much stack we use.
441 * uio is kmalloced for this reason...
445 struct dentry *dentry,
446 struct nameidata *nd)
451 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
455 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
459 nd_set_link(nd, link);
465 nd_set_link(nd, ERR_PTR(error));
471 struct dentry *dentry,
472 struct nameidata *nd,
475 char *s = nd_get_link(nd);
483 struct vfsmount *mnt,
484 struct dentry *dentry,
487 struct inode *inode = dentry->d_inode;
488 struct xfs_inode *ip = XFS_I(inode);
489 struct xfs_mount *mp = ip->i_mount;
491 trace_xfs_getattr(ip);
493 if (XFS_FORCED_SHUTDOWN(mp))
494 return XFS_ERROR(EIO);
496 stat->size = XFS_ISIZE(ip);
497 stat->dev = inode->i_sb->s_dev;
498 stat->mode = ip->i_d.di_mode;
499 stat->nlink = ip->i_d.di_nlink;
500 stat->uid = ip->i_d.di_uid;
501 stat->gid = ip->i_d.di_gid;
502 stat->ino = ip->i_ino;
503 stat->atime = inode->i_atime;
504 stat->mtime = inode->i_mtime;
505 stat->ctime = inode->i_ctime;
507 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
510 switch (inode->i_mode & S_IFMT) {
513 stat->blksize = BLKDEV_IOSIZE;
514 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
515 sysv_minor(ip->i_df.if_u2.if_rdev));
518 if (XFS_IS_REALTIME_INODE(ip)) {
520 * If the file blocks are being allocated from a
521 * realtime volume, then return the inode's realtime
522 * extent size or the realtime volume's extent size.
525 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
527 stat->blksize = xfs_preferred_iosize(mp);
537 struct dentry *dentry,
540 return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0);
553 xfs_inode_t *ip = XFS_I(inode);
555 /* preallocation on directories not yet supported */
557 if (S_ISDIR(inode->i_mode))
564 xfs_ilock(ip, XFS_IOLOCK_EXCL);
566 /* check the new inode size is valid before allocating */
567 if (!(mode & FALLOC_FL_KEEP_SIZE) &&
568 offset + len > i_size_read(inode)) {
569 new_size = offset + len;
570 error = inode_newsize_ok(inode, new_size);
575 error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
580 /* Change file size if needed */
584 iattr.ia_valid = ATTR_SIZE;
585 iattr.ia_size = new_size;
586 error = -xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK);
590 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
595 #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
598 * Call fiemap helper to fill in user data.
599 * Returns positive errors to xfs_getbmap.
604 struct getbmapx *bmv,
608 struct fiemap_extent_info *fieinfo = *arg;
609 u32 fiemap_flags = 0;
610 u64 logical, physical, length;
612 /* Do nothing for a hole */
613 if (bmv->bmv_block == -1LL)
616 logical = BBTOB(bmv->bmv_offset);
617 physical = BBTOB(bmv->bmv_block);
618 length = BBTOB(bmv->bmv_length);
620 if (bmv->bmv_oflags & BMV_OF_PREALLOC)
621 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
622 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
623 fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
624 physical = 0; /* no block yet */
626 if (bmv->bmv_oflags & BMV_OF_LAST)
627 fiemap_flags |= FIEMAP_EXTENT_LAST;
629 error = fiemap_fill_next_extent(fieinfo, logical, physical,
630 length, fiemap_flags);
633 *full = 1; /* user array now full */
642 struct fiemap_extent_info *fieinfo,
646 xfs_inode_t *ip = XFS_I(inode);
650 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
654 /* Set up bmap header for xfs internal routine */
655 bm.bmv_offset = BTOBB(start);
656 /* Special case for whole file */
657 if (length == FIEMAP_MAX_OFFSET)
658 bm.bmv_length = -1LL;
660 bm.bmv_length = BTOBB(length);
662 /* We add one because in getbmap world count includes the header */
663 bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
664 fieinfo->fi_extents_max + 1;
665 bm.bmv_count = min_t(__s32, bm.bmv_count,
666 (PAGE_SIZE * 16 / sizeof(struct getbmapx)));
667 bm.bmv_iflags = BMV_IF_PREALLOC;
668 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
669 bm.bmv_iflags |= BMV_IF_ATTRFORK;
670 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
671 bm.bmv_iflags |= BMV_IF_DELALLOC;
673 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
680 static const struct inode_operations xfs_inode_operations = {
681 .check_acl = xfs_check_acl,
682 .getattr = xfs_vn_getattr,
683 .setattr = xfs_vn_setattr,
684 .setxattr = generic_setxattr,
685 .getxattr = generic_getxattr,
686 .removexattr = generic_removexattr,
687 .listxattr = xfs_vn_listxattr,
688 .fallocate = xfs_vn_fallocate,
689 .fiemap = xfs_vn_fiemap,
692 static const struct inode_operations xfs_dir_inode_operations = {
693 .create = xfs_vn_create,
694 .lookup = xfs_vn_lookup,
696 .unlink = xfs_vn_unlink,
697 .symlink = xfs_vn_symlink,
698 .mkdir = xfs_vn_mkdir,
700 * Yes, XFS uses the same method for rmdir and unlink.
702 * There are some subtile differences deeper in the code,
703 * but we use S_ISDIR to check for those.
705 .rmdir = xfs_vn_unlink,
706 .mknod = xfs_vn_mknod,
707 .rename = xfs_vn_rename,
708 .check_acl = xfs_check_acl,
709 .getattr = xfs_vn_getattr,
710 .setattr = xfs_vn_setattr,
711 .setxattr = generic_setxattr,
712 .getxattr = generic_getxattr,
713 .removexattr = generic_removexattr,
714 .listxattr = xfs_vn_listxattr,
717 static const struct inode_operations xfs_dir_ci_inode_operations = {
718 .create = xfs_vn_create,
719 .lookup = xfs_vn_ci_lookup,
721 .unlink = xfs_vn_unlink,
722 .symlink = xfs_vn_symlink,
723 .mkdir = xfs_vn_mkdir,
725 * Yes, XFS uses the same method for rmdir and unlink.
727 * There are some subtile differences deeper in the code,
728 * but we use S_ISDIR to check for those.
730 .rmdir = xfs_vn_unlink,
731 .mknod = xfs_vn_mknod,
732 .rename = xfs_vn_rename,
733 .check_acl = xfs_check_acl,
734 .getattr = xfs_vn_getattr,
735 .setattr = xfs_vn_setattr,
736 .setxattr = generic_setxattr,
737 .getxattr = generic_getxattr,
738 .removexattr = generic_removexattr,
739 .listxattr = xfs_vn_listxattr,
742 static const struct inode_operations xfs_symlink_inode_operations = {
743 .readlink = generic_readlink,
744 .follow_link = xfs_vn_follow_link,
745 .put_link = xfs_vn_put_link,
746 .check_acl = xfs_check_acl,
747 .getattr = xfs_vn_getattr,
748 .setattr = xfs_vn_setattr,
749 .setxattr = generic_setxattr,
750 .getxattr = generic_getxattr,
751 .removexattr = generic_removexattr,
752 .listxattr = xfs_vn_listxattr,
756 xfs_diflags_to_iflags(
758 struct xfs_inode *ip)
760 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
761 inode->i_flags |= S_IMMUTABLE;
763 inode->i_flags &= ~S_IMMUTABLE;
764 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
765 inode->i_flags |= S_APPEND;
767 inode->i_flags &= ~S_APPEND;
768 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
769 inode->i_flags |= S_SYNC;
771 inode->i_flags &= ~S_SYNC;
772 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
773 inode->i_flags |= S_NOATIME;
775 inode->i_flags &= ~S_NOATIME;
779 * Initialize the Linux inode, set up the operation vectors and
782 * When reading existing inodes from disk this is called directly
783 * from xfs_iget, when creating a new inode it is called from
784 * xfs_ialloc after setting up the inode.
786 * We are always called with an uninitialised linux inode here.
787 * We need to initialise the necessary fields and take a reference
792 struct xfs_inode *ip)
794 struct inode *inode = &ip->i_vnode;
796 inode->i_ino = ip->i_ino;
797 inode->i_state = I_NEW;
798 inode_add_to_lists(ip->i_mount->m_super, inode);
800 inode->i_mode = ip->i_d.di_mode;
801 inode->i_nlink = ip->i_d.di_nlink;
802 inode->i_uid = ip->i_d.di_uid;
803 inode->i_gid = ip->i_d.di_gid;
805 switch (inode->i_mode & S_IFMT) {
809 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
810 sysv_minor(ip->i_df.if_u2.if_rdev));
817 inode->i_generation = ip->i_d.di_gen;
818 i_size_write(inode, ip->i_d.di_size);
819 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
820 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
821 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
822 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
823 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
824 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
825 xfs_diflags_to_iflags(inode, ip);
827 switch (inode->i_mode & S_IFMT) {
829 inode->i_op = &xfs_inode_operations;
830 inode->i_fop = &xfs_file_operations;
831 inode->i_mapping->a_ops = &xfs_address_space_operations;
834 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
835 inode->i_op = &xfs_dir_ci_inode_operations;
837 inode->i_op = &xfs_dir_inode_operations;
838 inode->i_fop = &xfs_dir_file_operations;
841 inode->i_op = &xfs_symlink_inode_operations;
842 if (!(ip->i_df.if_flags & XFS_IFINLINE))
843 inode->i_mapping->a_ops = &xfs_address_space_operations;
846 inode->i_op = &xfs_inode_operations;
847 init_special_inode(inode, inode->i_mode, inode->i_rdev);
851 xfs_iflags_clear(ip, XFS_INEW);
854 unlock_new_inode(inode);