3 fs/namei.c | 295 +++++++++++++++++++++++++++++++++++++++-------
4 fs/namespace.c | 28 +++-
5 fs/open.c | 172 +++++++++++++++++++-------
6 fs/stat.c | 52 +++++---
7 include/linux/dcache.h | 60 +++++++++
8 include/linux/fs.h | 32 ++++
9 include/linux/fs_struct.h | 4
13 12 files changed, 558 insertions(+), 128 deletions(-)
15 Index: linux-2.4.21-x86_64/fs/dcache.c
16 ===================================================================
17 --- linux-2.4.21-x86_64.orig/fs/dcache.c 2003-10-28 10:33:59.000000000 -0800
18 +++ linux-2.4.21-x86_64/fs/dcache.c 2004-04-12 19:57:36.000000000 -0700
20 spin_unlock(&dcache_lock);
24 + /* network invalidation by Lustre */
25 + if (dentry->d_flags & DCACHE_LUSTRE_INVALID) {
26 + spin_unlock(&dcache_lock);
31 * Check whether to do a partial shrink_dcache
32 * to get rid of unused child entries.
34 * Adds a dentry to the hash according to its name.
37 -void d_rehash(struct dentry * entry)
38 +void __d_rehash(struct dentry * entry, int lock)
40 struct list_head *list = d_hash(entry->d_parent, entry->d_name.hash);
41 if (!list_empty(&entry->d_hash)) BUG();
42 - spin_lock(&dcache_lock);
43 + if (lock) spin_lock(&dcache_lock);
44 list_add(&entry->d_hash, list);
45 - spin_unlock(&dcache_lock);
46 + if (lock) spin_unlock(&dcache_lock);
48 +EXPORT_SYMBOL(__d_rehash);
50 +void d_rehash(struct dentry * entry)
52 + __d_rehash(entry, 1);
55 #define do_switch(x,y) do { \
56 Index: linux-2.4.21-x86_64/fs/exec.c
57 ===================================================================
58 --- linux-2.4.21-x86_64.orig/fs/exec.c 2003-10-28 10:34:17.000000000 -0800
59 +++ linux-2.4.21-x86_64/fs/exec.c 2004-04-12 19:57:36.000000000 -0700
64 + struct lookup_intent it = { .it_op = IT_OPEN,
65 + .it_flags = FMODE_READ|FMODE_EXEC };
67 - error = user_path_walk(library, &nd);
68 + error = user_path_walk_it(library, &nd, &it);
76 - file = dentry_open(nd.dentry, nd.mnt, O_RDONLY);
77 + file = dentry_open_it(nd.dentry, nd.mnt, O_RDONLY, &it);
78 + intent_release(&it);
79 error = PTR_ERR(file);
86 + struct lookup_intent it = { .it_op = IT_OPEN,
87 + .it_flags = FMODE_READ|FMODE_EXEC };
89 - err = path_lookup(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd);
90 + err = path_lookup_it(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd, &it);
93 inode = nd.dentry->d_inode;
98 - file = dentry_open(nd.dentry, nd.mnt, O_RDONLY);
99 + file = dentry_open_it(nd.dentry, nd.mnt, O_RDONLY, &it);
100 + intent_release(&it);
102 err = deny_write_access(file);
108 + intent_release(&it);
112 @@ -1150,7 +1157,7 @@
114 if (!file->f_op->write)
116 - if (do_truncate(file->f_dentry, 0) != 0)
117 + if (do_truncate(file->f_dentry, 0, 0) != 0)
120 retval = binfmt->core_dump(signr, regs, file);
121 Index: linux-2.4.21-x86_64/fs/namei.c
122 ===================================================================
123 --- linux-2.4.21-x86_64.orig/fs/namei.c 2003-10-28 10:34:18.000000000 -0800
124 +++ linux-2.4.21-x86_64/fs/namei.c 2004-04-12 19:58:44.000000000 -0700
126 * XEmacs seems to be relying on it...
129 +void intent_release(struct lookup_intent *it)
131 + if (it && it->it_op_release)
132 + it->it_op_release(it);
136 /* In order to reduce some races, while at the same time doing additional
137 * checking and hopefully speeding things up, we copy filenames to the
138 * kernel data space before using them..
139 @@ -260,10 +267,19 @@
140 * Internal lookup() using the new generic dcache.
143 -static struct dentry * cached_lookup(struct dentry * parent, struct qstr * name, int flags)
144 +static struct dentry *cached_lookup(struct dentry *parent, struct qstr *name,
145 + int flags, struct lookup_intent *it)
147 struct dentry * dentry = d_lookup(parent, name);
149 + if (dentry && dentry->d_op && dentry->d_op->d_revalidate_it) {
150 + if (!dentry->d_op->d_revalidate_it(dentry, flags, it) &&
151 + !d_invalidate(dentry)) {
157 if (dentry && dentry->d_op && dentry->d_op->d_revalidate) {
158 if (!dentry->d_op->d_revalidate(dentry, flags) && !d_invalidate(dentry)) {
160 @@ -281,11 +297,15 @@
161 * make sure that nobody added the entry to the dcache in the meantime..
164 -static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, int flags)
165 +static struct dentry *real_lookup(struct dentry *parent, struct qstr *name,
166 + int flags, struct lookup_intent *it)
168 struct dentry * result;
169 struct inode *dir = parent->d_inode;
176 * First re-do the cached lookup just in case it was created
178 result = ERR_PTR(-ENOMEM);
181 + if (dir->i_op->lookup_it)
182 + result = dir->i_op->lookup_it(dir, dentry, it, flags);
184 result = dir->i_op->lookup(dir, dentry);
189 result = ERR_PTR(-ENOENT);
191 + } else if (result->d_op && result->d_op->d_revalidate_it) {
192 + if (!result->d_op->d_revalidate_it(result, flags, it) &&
193 + !d_invalidate(result)) {
196 + result = ERR_PTR(-ESTALE);
197 + if (!IS_ERR(result))
204 * Without that kind of total limit, nasty chains of consecutive
205 * symlinks can cause almost arbitrarily long lookups.
207 -static inline int do_follow_link(struct dentry *dentry, struct nameidata *nd)
208 +static inline int do_follow_link(struct dentry *dentry, struct nameidata *nd,
209 + struct lookup_intent *it)
212 if (current->link_count >= 8)
213 @@ -346,10 +379,12 @@
214 current->link_count++;
215 current->total_link_count++;
216 UPDATE_ATIME(dentry->d_inode);
218 err = dentry->d_inode->i_op->follow_link(dentry, nd);
219 current->link_count--;
222 + intent_release(it);
228 * We expect 'base' to be positive and a directory.
230 -static inline int __link_path_walk(const char * name, struct nameidata *nd)
231 +static inline int __link_path_walk_it(const char * name, struct nameidata *nd,
232 + struct lookup_intent *it)
234 struct dentry *dentry;
236 @@ -524,12 +560,12 @@
239 /* This does the actual lookups.. */
240 - dentry = cached_lookup(nd->dentry, &this, LOOKUP_CONTINUE);
241 + dentry = cached_lookup(nd->dentry, &this, LOOKUP_CONTINUE, NULL);
243 err = -EWOULDBLOCKIO;
246 - dentry = real_lookup(nd->dentry, &this, LOOKUP_CONTINUE);
247 + dentry = real_lookup(nd->dentry, &this, LOOKUP_CONTINUE, NULL);
248 err = PTR_ERR(dentry);
254 if (inode->i_op->follow_link) {
255 - err = do_follow_link(dentry, nd);
256 + err = do_follow_link(dentry, nd, NULL);
264 - if (!inode->i_op->lookup)
265 + if (!inode->i_op->lookup && !inode->i_op->lookup_it)
268 /* here ends the main loop */
269 @@ -590,12 +626,12 @@
273 - dentry = cached_lookup(nd->dentry, &this, 0);
274 + dentry = cached_lookup(nd->dentry, &this, 0, it);
276 err = -EWOULDBLOCKIO;
279 - dentry = real_lookup(nd->dentry, &this, 0);
280 + dentry = real_lookup(nd->dentry, &this, 0, it);
281 err = PTR_ERR(dentry);
285 inode = dentry->d_inode;
286 if ((lookup_flags & LOOKUP_FOLLOW)
287 && inode && inode->i_op && inode->i_op->follow_link) {
288 - err = do_follow_link(dentry, nd);
289 + err = do_follow_link(dentry, nd, it);
295 if (lookup_flags & LOOKUP_DIRECTORY) {
297 - if (!inode->i_op || !inode->i_op->lookup)
298 + if (!inode->i_op ||
299 + (!inode->i_op->lookup && !inode->i_op->lookup_it))
304 * Check the cached dentry for staleness.
307 + if (dentry && dentry->d_op && dentry->d_op->d_revalidate_it) {
309 + if (!dentry->d_op->d_revalidate_it(dentry, 0, it)) {
310 + struct dentry *new;
311 + err = permission(dentry->d_parent->d_inode,
315 + new = real_lookup(dentry->d_parent,
316 + &dentry->d_name, 0, it);
317 + d_invalidate(dentry);
320 + err = PTR_ERR(new);
325 + if (!nd->dentry->d_inode)
328 if (dentry && dentry->d_op && dentry->d_op->d_revalidate) {
330 if (!dentry->d_op->d_revalidate(dentry, lookup_flags & LOOKUP_PARENT)) {
336 + intent_release(it);
340 @@ -663,13 +723,13 @@
342 int link_path_walk(const char * name, struct nameidata *nd)
344 - return __link_path_walk(name,nd);
345 + return __link_path_walk_it(name, nd, NULL);
348 static inline int __path_walk(const char * name, struct nameidata *nd)
350 current->total_link_count = 0;
351 - return __link_path_walk(name, nd);
352 + return __link_path_walk_it(name, nd, NULL);
355 int path_walk(const char * name, struct nameidata *nd)
357 return __path_walk(name, nd);
360 +int path_walk_it(const char * name, struct nameidata *nd, struct lookup_intent *it)
362 + current->total_link_count = 0;
363 + return __link_path_walk_it(name, nd, it);
367 /* returns 1 if everything is done */
368 static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
373 +int path_lookup_it(const char *path, unsigned flags, struct nameidata *nd,
374 + struct lookup_intent *it)
377 + if (path_init(path, flags, nd))
378 + error = path_walk_it(path, nd, it);
384 int path_lookup(const char *path, unsigned flags, struct nameidata *nd)
389 nd->last_type = LAST_ROOT; /* if there are only slashes... */
393 return walk_init_root(name,nd);
394 read_lock(¤t->fs->lock);
396 * needs parent already locked. Doesn't follow mounts.
399 -struct dentry * lookup_hash(struct qstr *name, struct dentry * base)
400 +struct dentry * lookup_hash_it(struct qstr *name, struct dentry * base,
401 + struct lookup_intent *it)
403 struct dentry * dentry;
405 @@ -810,13 +889,16 @@
409 - dentry = cached_lookup(base, name, 0);
410 + dentry = cached_lookup(base, name, 0, it);
412 struct dentry *new = d_alloc(base, name);
413 dentry = ERR_PTR(-ENOMEM);
417 + if (inode->i_op->lookup_it)
418 + dentry = inode->i_op->lookup_it(inode, new, it, 0);
420 dentry = inode->i_op->lookup(inode, new);
427 +struct dentry * lookup_hash(struct qstr *name, struct dentry * base)
429 + return lookup_hash_it(name, base, NULL);
434 struct dentry * lookup_one_len(const char * name, struct dentry * base, int len)
438 this.hash = end_name_hash(hash);
440 - return lookup_hash(&this, base);
441 + return lookup_hash_it(&this, base, NULL);
443 return ERR_PTR(-EACCES);
449 +int __user_walk_it(const char *name, unsigned flags, struct nameidata *nd,
450 + struct lookup_intent *it)
455 + tmp = getname(name);
456 + err = PTR_ERR(tmp);
457 + if (!IS_ERR(tmp)) {
459 + if (path_init(tmp, flags, nd))
460 + err = path_walk_it(tmp, nd, it);
467 * It's inline, so penalty for filesystems that don't use sticky bit is
473 -int vfs_create(struct inode *dir, struct dentry *dentry, int mode)
474 +static int vfs_create_it(struct inode *dir, struct dentry *dentry, int mode,
475 + struct lookup_intent *it)
479 @@ -990,12 +1096,15 @@
482 error = -EACCES; /* shouldn't it be ENOSYS? */
483 - if (!dir->i_op || !dir->i_op->create)
484 + if (!dir->i_op || (!dir->i_op->create && !dir->i_op->create_it))
489 - error = dir->i_op->create(dir, dentry, mode);
490 + if (dir->i_op->create_it)
491 + error = dir->i_op->create_it(dir, dentry, mode, it);
493 + error = dir->i_op->create(dir, dentry, mode);
497 @@ -1004,6 +1113,11 @@
501 +int vfs_create(struct inode *dir, struct dentry *dentry, int mode)
503 + return vfs_create_it(dir, dentry, mode, NULL);
509 @@ -1018,7 +1132,8 @@
510 * for symlinks (where the permissions are checked later).
513 -int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd)
514 +int open_namei_it(const char *pathname, int flag, int mode,
515 + struct nameidata *nd, struct lookup_intent *it)
517 int acc_mode, error = 0;
519 @@ -1028,11 +1143,14 @@
521 acc_mode = ACC_MODE(flag);
524 + it->it_flags = flag;
527 * The simplest case - just a plain lookup.
529 if (!(flag & O_CREAT)) {
530 - error = path_lookup(pathname, lookup_flags(flag), nd);
531 + error = path_lookup_it(pathname, lookup_flags(flag), nd, it);
535 @@ -1042,6 +1160,10 @@
537 * Create - we need to know the parent.
540 + it->it_create_mode = mode;
541 + it->it_op |= IT_CREAT;
543 error = path_lookup(pathname, LOOKUP_PARENT, nd);
546 @@ -1057,7 +1179,7 @@
549 down(&dir->d_inode->i_sem);
550 - dentry = lookup_hash(&nd->last, nd->dentry);
551 + dentry = lookup_hash_it(&nd->last, nd->dentry, it);
554 error = PTR_ERR(dentry);
555 @@ -1066,11 +1188,12 @@
559 + it->it_create_mode = mode;
560 /* Negative dentry, just create the file */
561 if (!dentry->d_inode) {
562 if (!IS_POSIXACL(dir->d_inode))
563 mode &= ~current->fs->umask;
564 - error = vfs_create(dir->d_inode, dentry, mode);
565 + error = vfs_create_it(dir->d_inode, dentry, mode, it);
566 up(&dir->d_inode->i_sem);
567 #ifndef DENTRY_WASTE_RAM
569 @@ -1178,7 +1301,7 @@
573 - error = do_truncate(dentry, 0);
574 + error = do_truncate(dentry, 0, 1);
576 put_write_access(inode);
578 @@ -1190,8 +1313,10 @@
582 + intent_release(it);
585 + intent_release(it);
589 @@ -1210,7 +1335,10 @@
590 * are done. Procfs-like symlinks just set LAST_BIND.
592 UPDATE_ATIME(dentry->d_inode);
594 error = dentry->d_inode->i_op->follow_link(dentry, nd);
596 + intent_release(it);
600 @@ -1232,13 +1360,20 @@
603 down(&dir->d_inode->i_sem);
604 - dentry = lookup_hash(&nd->last, nd->dentry);
605 + dentry = lookup_hash_it(&nd->last, nd->dentry, it);
606 putname(nd->last.name);
610 +int open_namei(const char *pathname, int flag, int mode, struct nameidata *nd)
612 + return open_namei_it(pathname, flag, mode, nd, NULL);
617 -struct dentry *lookup_create(struct nameidata *nd, int is_dir)
618 +struct dentry *lookup_create(struct nameidata *nd, int is_dir,
619 + struct lookup_intent *it)
621 struct dentry *dentry;
623 @@ -1246,7 +1381,7 @@
624 dentry = ERR_PTR(-EEXIST);
625 if (nd->last_type != LAST_NORM)
627 - dentry = lookup_hash(&nd->last, nd->dentry);
628 + dentry = lookup_hash_it(&nd->last, nd->dentry, it);
631 if (!is_dir && nd->last.name[nd->last.len] && !dentry->d_inode)
632 @@ -1302,7 +1437,20 @@
633 error = path_lookup(tmp, LOOKUP_PARENT, &nd);
636 - dentry = lookup_create(&nd, 0);
638 + if (nd.last_type != LAST_NORM) {
642 + if (nd.dentry->d_inode->i_op->mknod_raw) {
643 + struct inode_operations *op = nd.dentry->d_inode->i_op;
644 + error = op->mknod_raw(&nd, mode, dev);
645 + /* the file system wants to use normal vfs path now */
646 + if (error != -EOPNOTSUPP)
650 + dentry = lookup_create(&nd, 0, NULL);
651 error = PTR_ERR(dentry);
653 if (!IS_POSIXACL(nd.dentry->d_inode))
654 @@ -1324,6 +1472,7 @@
657 up(&nd.dentry->d_inode->i_sem);
662 @@ -1371,7 +1520,18 @@
663 error = path_lookup(tmp, LOOKUP_PARENT, &nd);
666 - dentry = lookup_create(&nd, 1);
667 + if (nd.last_type != LAST_NORM) {
671 + if (nd.dentry->d_inode->i_op->mkdir_raw) {
672 + struct inode_operations *op = nd.dentry->d_inode->i_op;
673 + error = op->mkdir_raw(&nd, mode);
674 + /* the file system wants to use normal vfs path now */
675 + if (error != -EOPNOTSUPP)
678 + dentry = lookup_create(&nd, 1, NULL);
679 error = PTR_ERR(dentry);
680 if (!IS_ERR(dentry)) {
681 if (!IS_POSIXACL(nd.dentry->d_inode))
682 @@ -1380,6 +1540,7 @@
685 up(&nd.dentry->d_inode->i_sem);
690 @@ -1480,8 +1641,16 @@
694 + if (nd.dentry->d_inode->i_op->rmdir_raw) {
695 + struct inode_operations *op = nd.dentry->d_inode->i_op;
697 + error = op->rmdir_raw(&nd);
698 + /* the file system wants to use normal vfs path now */
699 + if (error != -EOPNOTSUPP)
702 down(&nd.dentry->d_inode->i_sem);
703 - dentry = lookup_hash(&nd.last, nd.dentry);
704 + dentry = lookup_hash_it(&nd.last, nd.dentry, NULL);
705 error = PTR_ERR(dentry);
706 if (!IS_ERR(dentry)) {
707 error = vfs_rmdir(nd.dentry->d_inode, dentry);
708 @@ -1539,8 +1708,15 @@
710 if (nd.last_type != LAST_NORM)
712 + if (nd.dentry->d_inode->i_op->unlink_raw) {
713 + struct inode_operations *op = nd.dentry->d_inode->i_op;
714 + error = op->unlink_raw(&nd);
715 + /* the file system wants to use normal vfs path now */
716 + if (error != -EOPNOTSUPP)
719 down(&nd.dentry->d_inode->i_sem);
720 - dentry = lookup_hash(&nd.last, nd.dentry);
721 + dentry = lookup_hash_it(&nd.last, nd.dentry, NULL);
722 error = PTR_ERR(dentry);
723 if (!IS_ERR(dentry)) {
724 /* Why not before? Because we want correct error value */
725 @@ -1607,15 +1783,27 @@
726 error = path_lookup(to, LOOKUP_PARENT, &nd);
729 - dentry = lookup_create(&nd, 0);
730 + if (nd.last_type != LAST_NORM) {
734 + if (nd.dentry->d_inode->i_op->symlink_raw) {
735 + struct inode_operations *op = nd.dentry->d_inode->i_op;
736 + error = op->symlink_raw(&nd, from);
737 + /* the file system wants to use normal vfs path now */
738 + if (error != -EOPNOTSUPP)
741 + dentry = lookup_create(&nd, 0, NULL);
742 error = PTR_ERR(dentry);
743 if (!IS_ERR(dentry)) {
744 error = vfs_symlink(nd.dentry->d_inode, dentry, from);
747 up(&nd.dentry->d_inode->i_sem);
755 @@ -1691,7 +1879,18 @@
757 if (old_nd.mnt != nd.mnt)
759 - new_dentry = lookup_create(&nd, 0);
760 + if (nd.last_type != LAST_NORM) {
764 + if (nd.dentry->d_inode->i_op->link_raw) {
765 + struct inode_operations *op = nd.dentry->d_inode->i_op;
766 + error = op->link_raw(&old_nd, &nd);
767 + /* the file system wants to use normal vfs path now */
768 + if (error != -EOPNOTSUPP)
771 + new_dentry = lookup_create(&nd, 0, NULL);
772 error = PTR_ERR(new_dentry);
773 if (!IS_ERR(new_dentry)) {
774 error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
775 @@ -1735,7 +1934,7 @@
778 int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
779 - struct inode *new_dir, struct dentry *new_dentry)
780 + struct inode *new_dir, struct dentry *new_dentry)
783 struct inode *target;
784 @@ -1814,7 +2013,7 @@
787 int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
788 - struct inode *new_dir, struct dentry *new_dentry)
789 + struct inode *new_dir, struct dentry *new_dentry)
793 @@ -1902,9 +2101,18 @@
794 if (newnd.last_type != LAST_NORM)
797 + if (old_dir->d_inode->i_op->rename_raw) {
799 + error = old_dir->d_inode->i_op->rename_raw(&oldnd, &newnd);
801 + /* the file system wants to use normal vfs path now */
802 + if (error != -EOPNOTSUPP)
806 double_lock(new_dir, old_dir);
808 - old_dentry = lookup_hash(&oldnd.last, old_dir);
809 + old_dentry = lookup_hash_it(&oldnd.last, old_dir, NULL);
810 error = PTR_ERR(old_dentry);
811 if (IS_ERR(old_dentry))
813 @@ -1920,16 +2128,16 @@
814 if (newnd.last.name[newnd.last.len])
817 - new_dentry = lookup_hash(&newnd.last, new_dir);
818 + new_dentry = lookup_hash_it(&newnd.last, new_dir, NULL);
819 error = PTR_ERR(new_dentry);
820 if (IS_ERR(new_dentry))
825 error = vfs_rename(old_dir->d_inode, old_dentry,
826 new_dir->d_inode, new_dentry);
832 @@ -1980,20 +2188,26 @@
836 -__vfs_follow_link(struct nameidata *nd, const char *link)
837 +__vfs_follow_link(struct nameidata *nd, const char *link,
838 + struct lookup_intent *it)
847 + else if (it != nd->intent)
848 + printk("it != nd->intent: tell phil@clusterfs.com\n");
852 if (!walk_init_root(link, nd))
853 /* weird __emul_prefix() stuff did it */
856 - res = __link_path_walk(link, nd);
857 + res = __link_path_walk_it(link, nd, it);
859 if (current->link_count || res || nd->last_type!=LAST_NORM)
861 @@ -2017,7 +2231,13 @@
863 int vfs_follow_link(struct nameidata *nd, const char *link)
865 - return __vfs_follow_link(nd, link);
866 + return __vfs_follow_link(nd, link, NULL);
869 +int vfs_follow_link_it(struct nameidata *nd, const char *link,
870 + struct lookup_intent *it)
872 + return __vfs_follow_link(nd, link, it);
875 /* get the link contents into pagecache */
876 @@ -2059,7 +2279,7 @@
878 struct page *page = NULL;
879 char *s = page_getlink(dentry, &page);
880 - int res = __vfs_follow_link(nd, s);
881 + int res = __vfs_follow_link(nd, s, NULL);
884 page_cache_release(page);
885 Index: linux-2.4.21-x86_64/fs/namespace.c
886 ===================================================================
887 --- linux-2.4.21-x86_64.orig/fs/namespace.c 2003-10-28 10:34:12.000000000 -0800
888 +++ linux-2.4.21-x86_64/fs/namespace.c 2004-04-12 19:57:36.000000000 -0700
891 old_nd->dentry = mnt->mnt_mountpoint;
892 old_nd->mnt = mnt->mnt_parent;
893 + UNPIN(old_nd->dentry, old_nd->mnt, 1);
894 mnt->mnt_parent = mnt;
895 mnt->mnt_mountpoint = mnt->mnt_root;
896 list_del_init(&mnt->mnt_child);
899 mnt->mnt_parent = mntget(nd->mnt);
900 mnt->mnt_mountpoint = dget(nd->dentry);
901 + PIN(nd->dentry, nd->mnt, 1);
902 list_add(&mnt->mnt_hash, mount_hashtable+hash(nd->mnt, nd->dentry));
903 list_add(&mnt->mnt_child, &nd->mnt->mnt_mounts);
904 nd->dentry->d_mounted++;
905 @@ -488,14 +490,17 @@
907 struct nameidata old_nd;
908 struct vfsmount *mnt = NULL;
909 + struct lookup_intent it = { .it_op = IT_GETATTR };
910 int err = mount_is_safe(nd);
913 if (!old_name || !*old_name)
915 - err = path_lookup(old_name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &old_nd);
917 + err = path_lookup_it(old_name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &old_nd, &it);
919 + intent_release(&it);
923 down_write(¤t->namespace->sem);
928 up_write(¤t->namespace->sem);
929 + intent_release(&it);
930 path_release(&old_nd);
934 unsigned long flags, void *data_page)
937 + struct lookup_intent it = { .it_op = IT_GETATTR };
942 flags &= ~(MS_NOSUID|MS_NOEXEC|MS_NODEV);
944 /* ... and get the mountpoint */
945 - retval = path_lookup(dir_name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd);
947 + retval = path_lookup_it(dir_name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd, &it);
949 + intent_release(&it);
953 if (flags & MS_REMOUNT)
954 retval = do_remount(&nd, flags & ~MS_REMOUNT, mnt_flags,
957 retval = do_add_mount(&nd, type_page, flags, mnt_flags,
958 dev_name, data_page);
960 + intent_release(&it);
966 struct vfsmount *tmp;
967 struct nameidata new_nd, old_nd, parent_nd, root_parent, user_nd;
968 + struct lookup_intent new_it = { .it_op = IT_GETATTR };
969 + struct lookup_intent old_it = { .it_op = IT_GETATTR };
972 if (!capable(CAP_SYS_ADMIN))
973 @@ -911,14 +923,14 @@
977 - error = __user_walk(new_root, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &new_nd);
978 + error = __user_walk_it(new_root, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &new_nd, &new_it);
982 if (!check_mnt(new_nd.mnt))
985 - error = __user_walk(put_old, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &old_nd);
986 + error = __user_walk_it(put_old, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &old_nd, &old_it);
991 up(&old_nd.dentry->d_inode->i_zombie);
992 up_write(¤t->namespace->sem);
993 path_release(&user_nd);
994 + intent_release(&old_it);
995 path_release(&old_nd);
997 + intent_release(&new_it);
998 path_release(&new_nd);
1001 Index: linux-2.4.21-x86_64/fs/open.c
1002 ===================================================================
1003 --- linux-2.4.21-x86_64.orig/fs/open.c 2003-10-28 10:33:59.000000000 -0800
1004 +++ linux-2.4.21-x86_64/fs/open.c 2004-04-12 19:57:36.000000000 -0700
1006 #include <asm/uaccess.h>
1008 #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m))
1009 +extern int path_walk_it(const char *name, struct nameidata *nd,
1010 + struct lookup_intent *it);
1012 int vfs_statfs(struct super_block *sb, struct statfs *buf)
1015 write_unlock(&files->file_lock);
1018 -int do_truncate(struct dentry *dentry, loff_t length)
1019 +int do_truncate(struct dentry *dentry, loff_t length, int called_from_open)
1021 struct inode *inode = dentry->d_inode;
1022 + struct inode_operations *op = dentry->d_inode->i_op;
1024 struct iattr newattrs;
1026 @@ -109,7 +112,13 @@
1027 down(&inode->i_sem);
1028 newattrs.ia_size = length;
1029 newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
1030 - error = notify_change(dentry, &newattrs);
1031 + if (called_from_open)
1032 + newattrs.ia_valid |= ATTR_FROM_OPEN;
1033 + if (op->setattr_raw) {
1034 + newattrs.ia_valid |= ATTR_RAW;
1035 + error = op->setattr_raw(inode, &newattrs);
1037 + error = notify_change(dentry, &newattrs);
1039 up_write(&inode->i_alloc_sem);
1041 @@ -120,12 +129,13 @@
1042 struct nameidata nd;
1043 struct inode * inode;
1045 + struct lookup_intent it = { .it_op = IT_GETATTR };
1048 if (length < 0) /* sorry, but loff_t says... */
1051 - error = user_path_walk(path, &nd);
1052 + error = user_path_walk_it(path, &nd, &it);
1055 inode = nd.dentry->d_inode;
1056 @@ -165,11 +175,13 @@
1057 error = locks_verify_truncate(inode, NULL, length);
1060 - error = do_truncate(nd.dentry, length);
1061 + intent_release(&it);
1062 + error = do_truncate(nd.dentry, length, 0);
1064 put_write_access(inode);
1067 + intent_release(&it);
1073 error = locks_verify_truncate(inode, file, length);
1075 - error = do_truncate(dentry, length);
1076 + error = do_truncate(dentry, length, 0);
1080 @@ -262,11 +274,13 @@
1081 struct inode * inode;
1082 struct iattr newattrs;
1084 - error = user_path_walk(filename, &nd);
1085 + error = user_path_walk_it(filename, &nd, NULL);
1088 inode = nd.dentry->d_inode;
1090 + /* this is safe without a Lustre lock because it only depends
1091 + on the super block */
1093 if (IS_RDONLY(inode))
1095 @@ -281,11 +295,25 @@
1098 newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
1102 + if (inode->i_op->setattr_raw) {
1103 + struct inode_operations *op = nd.dentry->d_inode->i_op;
1105 + newattrs.ia_valid |= ATTR_RAW;
1106 + error = op->setattr_raw(inode, &newattrs);
1107 + /* the file system wants to use normal vfs path now */
1108 + if (error != -EOPNOTSUPP)
1109 + goto dput_and_out;
1114 if (current->fsuid != inode->i_uid &&
1115 (error = permission(inode,MAY_WRITE)) != 0)
1119 error = notify_change(nd.dentry, &newattrs);
1122 @@ -306,12 +334,14 @@
1123 struct inode * inode;
1124 struct iattr newattrs;
1126 - error = user_path_walk(filename, &nd);
1127 + error = user_path_walk_it(filename, &nd, NULL);
1131 inode = nd.dentry->d_inode;
1133 + /* this is safe without a Lustre lock because it only depends
1134 + on the super block */
1136 if (IS_RDONLY(inode))
1138 @@ -326,7 +356,20 @@
1139 newattrs.ia_atime = times[0].tv_sec;
1140 newattrs.ia_mtime = times[1].tv_sec;
1141 newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
1145 + if (inode->i_op->setattr_raw) {
1146 + struct inode_operations *op = nd.dentry->d_inode->i_op;
1148 + newattrs.ia_valid |= ATTR_RAW;
1149 + error = op->setattr_raw(inode, &newattrs);
1150 + /* the file system wants to use normal vfs path now */
1151 + if (error != -EOPNOTSUPP)
1152 + goto dput_and_out;
1157 if (current->fsuid != inode->i_uid &&
1158 (error = permission(inode,MAY_WRITE)) != 0)
1161 int old_fsuid, old_fsgid;
1162 kernel_cap_t old_cap;
1164 + struct lookup_intent it = { .it_op = IT_GETATTR };
1166 if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */
1168 @@ -366,13 +410,14 @@
1170 current->cap_effective = current->cap_permitted;
1172 - res = user_path_walk(filename, &nd);
1173 + res = user_path_walk_it(filename, &nd, &it);
1175 res = permission(nd.dentry->d_inode, mode);
1176 /* SuS v2 requires we report a read only fs too */
1177 if(!res && (mode & S_IWOTH) && IS_RDONLY(nd.dentry->d_inode)
1178 && !special_file(nd.dentry->d_inode->i_mode))
1180 + intent_release(&it);
1187 struct nameidata nd;
1188 + struct lookup_intent it = { .it_op = IT_GETATTR };
1190 - error = __user_walk(filename,LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY,&nd);
1191 + error = __user_walk_it(filename,LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY,&nd, &it);
1196 set_fs_pwd(current->fs, nd.mnt, nd.dentry);
1199 + intent_release(&it);
1203 @@ -438,9 +485,10 @@
1206 struct nameidata nd;
1207 + struct lookup_intent it = { .it_op = IT_GETATTR };
1209 - error = __user_walk(filename, LOOKUP_POSITIVE | LOOKUP_FOLLOW |
1210 - LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd);
1211 + error = __user_walk_it(filename, LOOKUP_POSITIVE | LOOKUP_FOLLOW |
1212 + LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd, &it);
1216 @@ -456,39 +504,56 @@
1220 + intent_release(&it);
1226 -asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
1227 +int chmod_common(struct dentry *dentry, mode_t mode)
1229 - struct inode * inode;
1230 - struct dentry * dentry;
1231 - struct file * file;
1233 + struct inode *inode = dentry->d_inode;
1234 struct iattr newattrs;
1239 + if (IS_RDONLY(inode))
1242 - dentry = file->f_dentry;
1243 - inode = dentry->d_inode;
1244 + if (inode->i_op->setattr_raw) {
1245 + newattrs.ia_mode = mode;
1246 + newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
1247 + newattrs.ia_valid |= ATTR_RAW;
1248 + err = inode->i_op->setattr_raw(inode, &newattrs);
1249 + /* the file system wants to use normal vfs path now */
1250 + if (err != -EOPNOTSUPP)
1255 - if (IS_RDONLY(inode))
1258 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1262 if (mode == (mode_t) -1)
1263 mode = inode->i_mode;
1264 newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
1265 newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
1266 err = notify_change(dentry, &newattrs);
1273 +asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
1275 + struct file * file;
1282 + err = chmod_common(file->f_dentry, mode);
1287 @@ -497,30 +562,14 @@
1288 asmlinkage long sys_chmod(const char * filename, mode_t mode)
1290 struct nameidata nd;
1291 - struct inode * inode;
1293 - struct iattr newattrs;
1295 error = user_path_walk(filename, &nd);
1298 - inode = nd.dentry->d_inode;
1301 - if (IS_RDONLY(inode))
1302 - goto dput_and_out;
1305 - if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1306 - goto dput_and_out;
1307 + error = chmod_common(nd.dentry, mode);
1309 - if (mode == (mode_t) -1)
1310 - mode = inode->i_mode;
1311 - newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
1312 - newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
1313 - error = notify_change(nd.dentry, &newattrs);
1319 @@ -540,6 +589,20 @@
1321 if (IS_RDONLY(inode))
1324 + if (inode->i_op->setattr_raw) {
1325 + struct inode_operations *op = dentry->d_inode->i_op;
1327 + newattrs.ia_uid = user;
1328 + newattrs.ia_gid = group;
1329 + newattrs.ia_valid = ATTR_UID | ATTR_GID | ATTR_CTIME;
1330 + newattrs.ia_valid |= ATTR_RAW;
1331 + error = op->setattr_raw(inode, &newattrs);
1332 + /* the file system wants to use normal vfs path now */
1333 + if (error != -EOPNOTSUPP)
1338 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1342 int namei_flags, error;
1343 struct nameidata nd;
1344 + struct lookup_intent it = { .it_op = IT_OPEN };
1346 namei_flags = flags;
1347 if ((namei_flags+1) & O_ACCMODE)
1348 @@ -651,14 +715,15 @@
1349 if (namei_flags & O_TRUNC)
1352 - error = open_namei(filename, namei_flags, mode, &nd);
1354 - return dentry_open(nd.dentry, nd.mnt, flags);
1355 + error = open_namei_it(filename, namei_flags, mode, &nd, &it);
1357 + return ERR_PTR(error);
1359 - return ERR_PTR(error);
1360 + return dentry_open_it(nd.dentry, nd.mnt, flags, &it);
1363 -struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
1364 +struct file *dentry_open_it(struct dentry *dentry, struct vfsmount *mnt,
1365 + int flags, struct lookup_intent *it)
1368 struct inode *inode;
1370 file_move(f, &inode->i_sb->s_files);
1372 if (f->f_op && f->f_op->open) {
1374 error = f->f_op->open(inode,f);
1380 !inode->i_mapping->a_ops->direct_IO))
1383 + intent_release(it);
1387 @@ -710,11 +778,17 @@
1391 + intent_release(it);
1394 return ERR_PTR(error);
1397 +struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
1399 + return dentry_open_it(dentry, mnt, flags, NULL);
1403 * Find an empty file descriptor entry, and mark it busy.
1405 Index: linux-2.4.21-x86_64/fs/stat.c
1406 ===================================================================
1407 --- linux-2.4.21-x86_64.orig/fs/stat.c 2003-10-28 10:33:58.000000000 -0800
1408 +++ linux-2.4.21-x86_64/fs/stat.c 2004-04-12 19:58:44.000000000 -0700
1410 * Revalidate the inode. This is required for proper NFS attribute caching.
1412 static __inline__ int
1413 -do_revalidate(struct dentry *dentry)
1414 +do_revalidate(struct dentry *dentry, struct lookup_intent *it)
1416 struct inode * inode = dentry->d_inode;
1417 - if (inode->i_op && inode->i_op->revalidate)
1418 + if (inode->i_op && inode->i_op->revalidate_it)
1419 + return inode->i_op->revalidate_it(dentry, it);
1420 + else if (inode->i_op && inode->i_op->revalidate)
1421 return inode->i_op->revalidate(dentry);
1424 @@ -141,13 +143,15 @@
1425 asmlinkage long sys_stat(char * filename, struct __old_kernel_stat * statbuf)
1427 struct nameidata nd;
1428 + struct lookup_intent it = { .it_op = IT_GETATTR };
1431 - error = user_path_walk(filename, &nd);
1432 + error = user_path_walk_it(filename, &nd, &it);
1434 - error = do_revalidate(nd.dentry);
1435 + error = do_revalidate(nd.dentry, &it);
1437 error = cp_old_stat(nd.dentry->d_inode, statbuf);
1438 + intent_release(&it);
1442 @@ -157,13 +161,15 @@
1443 asmlinkage long sys_newstat(char * filename, struct stat * statbuf)
1445 struct nameidata nd;
1446 + struct lookup_intent it = { .it_op = IT_GETATTR };
1449 - error = user_path_walk(filename, &nd);
1450 + error = user_path_walk_it(filename, &nd, &it);
1452 - error = do_revalidate(nd.dentry);
1453 + error = do_revalidate(nd.dentry, &it);
1455 error = cp_new_stat(nd.dentry->d_inode, statbuf);
1456 + intent_release(&it);
1460 @@ -178,13 +184,15 @@
1461 asmlinkage long sys_lstat(char * filename, struct __old_kernel_stat * statbuf)
1463 struct nameidata nd;
1464 + struct lookup_intent it = { .it_op = IT_GETATTR };
1467 - error = user_path_walk_link(filename, &nd);
1468 + error = user_path_walk_link_it(filename, &nd, &it);
1470 - error = do_revalidate(nd.dentry);
1471 + error = do_revalidate(nd.dentry, &it);
1473 error = cp_old_stat(nd.dentry->d_inode, statbuf);
1474 + intent_release(&it);
1478 @@ -195,13 +203,15 @@
1479 asmlinkage long sys_newlstat(char * filename, struct stat * statbuf)
1481 struct nameidata nd;
1482 + struct lookup_intent it = { .it_op = IT_GETATTR };
1485 - error = user_path_walk_link(filename, &nd);
1486 + error = user_path_walk_link_it(filename, &nd, &it);
1488 - error = do_revalidate(nd.dentry);
1489 + error = do_revalidate(nd.dentry, &it);
1491 error = cp_new_stat(nd.dentry->d_inode, statbuf);
1492 + intent_release(&it);
1498 struct dentry * dentry = f->f_dentry;
1500 - err = do_revalidate(dentry);
1501 + err = do_revalidate(dentry, NULL);
1503 err = cp_old_stat(dentry->d_inode, statbuf);
1507 struct dentry * dentry = f->f_dentry;
1509 - err = do_revalidate(dentry);
1510 + err = do_revalidate(dentry, NULL);
1512 err = cp_new_stat(dentry->d_inode, statbuf);
1517 if (inode->i_op && inode->i_op->readlink &&
1518 - !(error = do_revalidate(nd.dentry))) {
1519 + !(error = do_revalidate(nd.dentry, NULL))) {
1520 UPDATE_ATIME(inode);
1521 error = inode->i_op->readlink(nd.dentry, buf, bufsiz);
1523 @@ -339,12 +349,14 @@
1525 struct nameidata nd;
1527 + struct lookup_intent it = { .it_op = IT_GETATTR };
1529 - error = user_path_walk(filename, &nd);
1530 + error = user_path_walk_it(filename, &nd, &it);
1532 - error = do_revalidate(nd.dentry);
1533 + error = do_revalidate(nd.dentry, &it);
1535 error = cp_new_stat64(nd.dentry->d_inode, statbuf);
1536 + intent_release(&it);
1540 @@ -354,12 +366,14 @@
1542 struct nameidata nd;
1544 + struct lookup_intent it = { .it_op = IT_GETATTR };
1546 - error = user_path_walk_link(filename, &nd);
1547 + error = user_path_walk_link_it(filename, &nd, &it);
1549 - error = do_revalidate(nd.dentry);
1550 + error = do_revalidate(nd.dentry, &it);
1552 error = cp_new_stat64(nd.dentry->d_inode, statbuf);
1553 + intent_release(&it);
1559 struct dentry * dentry = f->f_dentry;
1561 - err = do_revalidate(dentry);
1562 + err = do_revalidate(dentry, NULL);
1564 err = cp_new_stat64(dentry->d_inode, statbuf);
1566 Index: linux-2.4.21-x86_64/include/linux/dcache.h
1567 ===================================================================
1568 --- linux-2.4.21-x86_64.orig/include/linux/dcache.h 2003-11-10 16:44:28.000000000 -0800
1569 +++ linux-2.4.21-x86_64/include/linux/dcache.h 2004-04-12 19:57:36.000000000 -0700
1571 #include <linux/gdb.h>
1572 #include <linux/mount.h>
1573 #include <linux/kernel.h>
1574 +#include <linux/string.h>
1576 +#define IT_OPEN 0x0001
1577 +#define IT_CREAT 0x0002
1578 +#define IT_READDIR 0x0004
1579 +#define IT_GETATTR 0x0008
1580 +#define IT_LOOKUP 0x0010
1581 +#define IT_UNLINK 0x0020
1582 +#define IT_GETXATTR 0x0040
1583 +#define IT_EXEC 0x0080
1584 +#define IT_PIN 0x0100
1586 +#define IT_FL_LOCKED 0x0001
1587 +#define IT_FL_FOLLOWED 0x0002 /* set by vfs_follow_link */
1589 +#define INTENT_MAGIC 0x19620323
1592 +struct lustre_intent_data {
1593 + int it_disposition;
1595 + __u64 it_lock_handle;
1600 +struct lookup_intent {
1602 + void (*it_op_release)(struct lookup_intent *);
1605 + int it_create_mode;
1607 + struct lustre_intent_data lustre;
1611 +static inline void intent_init(struct lookup_intent *it, int op, int flags)
1613 + memset(it, 0, sizeof(*it));
1614 + it->it_magic = INTENT_MAGIC;
1616 + it->it_flags = flags;
1621 * linux/include/linux/dcache.h
1623 int (*d_delete)(struct dentry *);
1624 void (*d_release)(struct dentry *);
1625 void (*d_iput)(struct dentry *, struct inode *);
1626 + int (*d_revalidate_it)(struct dentry *, int, struct lookup_intent *);
1627 + void (*d_pin)(struct dentry *, struct vfsmount * , int);
1628 + void (*d_unpin)(struct dentry *, struct vfsmount *, int);
1631 +#define PIN(de,mnt,flag) if (de && de->d_op && de->d_op->d_pin) \
1632 + de->d_op->d_pin(de, mnt, flag);
1633 +#define UNPIN(de,mnt,flag) if (de && de->d_op && de->d_op->d_unpin) \
1634 + de->d_op->d_unpin(de, mnt, flag);
1637 +/* defined in fs/namei.c */
1638 +extern void intent_release(struct lookup_intent *it);
1639 +/* defined in fs/dcache.c */
1640 +extern void __d_rehash(struct dentry * entry, int lock);
1642 /* the dentry parameter passed to d_hash and d_compare is the parent
1643 * directory of the entries to be compared. It is used in case these
1644 * functions need any directory specific information for determining
1646 * s_nfsd_free_path semaphore will be down
1648 #define DCACHE_REFERENCED 0x0008 /* Recently used, don't discard. */
1649 +#define DCACHE_LUSTRE_INVALID 0x0010 /* Lustre invalidated */
1651 extern spinlock_t dcache_lock;
1653 Index: linux-2.4.21-x86_64/include/linux/fs.h
1654 ===================================================================
1655 --- linux-2.4.21-x86_64.orig/include/linux/fs.h 2004-04-12 19:57:33.000000000 -0700
1656 +++ linux-2.4.21-x86_64/include/linux/fs.h 2004-04-12 19:57:36.000000000 -0700
1659 #define FMODE_READ 1
1660 #define FMODE_WRITE 2
1661 +#define FMODE_EXEC 4
1666 #define ATTR_MTIME_SET 256
1667 #define ATTR_FORCE 512 /* Not a change, but a change it */
1668 #define ATTR_ATTR_FLAG 1024
1669 +#define ATTR_RAW 0x0800 /* file system, not vfs will massage attrs */
1670 +#define ATTR_FROM_OPEN 0x1000 /* called from open path, ie O_TRUNC */
1671 +#define ATTR_CTIME_SET 0x2000
1674 * This is the Inode Attributes structure, used for notify_change(). It
1676 struct pipe_inode_info *i_pipe;
1677 struct block_device *i_bdev;
1678 struct char_device *i_cdev;
1679 + void *i_filterdata;
1681 unsigned long i_dnotify_mask; /* Directory notify events */
1682 struct dnotify_struct *i_dnotify; /* for directory notifications */
1685 /* needed for tty driver, and maybe others */
1687 + struct lookup_intent *f_it;
1688 struct list_head f_ep_links;
1689 spinlock_t f_ep_lock;
1695 + struct lookup_intent *intent;
1700 extern int __vfs_rmdir(struct inode *, struct dentry *);
1701 extern int vfs_rmdir(struct inode *, struct dentry *);
1702 extern int vfs_unlink(struct inode *, struct dentry *);
1703 -extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
1704 +int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
1705 + struct inode *new_dir, struct dentry *new_dentry);
1709 @@ -992,21 +1000,32 @@
1711 struct inode_operations {
1712 int (*create) (struct inode *,struct dentry *,int);
1713 + int (*create_it) (struct inode *,struct dentry *,int, struct lookup_intent *);
1714 struct dentry * (*lookup) (struct inode *,struct dentry *);
1715 + struct dentry * (*lookup_it) (struct inode *,struct dentry *, struct lookup_intent *, int flags);
1716 int (*link) (struct dentry *,struct inode *,struct dentry *);
1717 + int (*link_raw) (struct nameidata *,struct nameidata *);
1718 int (*unlink) (struct inode *,struct dentry *);
1719 + int (*unlink_raw) (struct nameidata *);
1720 int (*symlink) (struct inode *,struct dentry *,const char *);
1721 + int (*symlink_raw) (struct nameidata *,const char *);
1722 int (*mkdir) (struct inode *,struct dentry *,int);
1723 + int (*mkdir_raw) (struct nameidata *,int);
1724 int (*rmdir) (struct inode *,struct dentry *);
1725 + int (*rmdir_raw) (struct nameidata *);
1726 int (*mknod) (struct inode *,struct dentry *,int,int);
1727 + int (*mknod_raw) (struct nameidata *,int,dev_t);
1728 int (*rename) (struct inode *, struct dentry *,
1729 struct inode *, struct dentry *);
1730 + int (*rename_raw) (struct nameidata *, struct nameidata *);
1731 int (*readlink) (struct dentry *, char *,int);
1732 int (*follow_link) (struct dentry *, struct nameidata *);
1733 void (*truncate) (struct inode *);
1734 int (*permission) (struct inode *, int);
1735 int (*revalidate) (struct dentry *);
1736 + int (*revalidate_it) (struct dentry *, struct lookup_intent *);
1737 int (*setattr) (struct dentry *, struct iattr *);
1738 + int (*setattr_raw) (struct inode *, struct iattr *);
1739 int (*getattr) (struct dentry *, struct iattr *);
1740 int (*setxattr) (struct dentry *, const char *, const void *, size_t, int);
1741 ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
1742 @@ -1205,10 +1224,14 @@
1744 asmlinkage long sys_open(const char *, int, int);
1745 asmlinkage long sys_close(unsigned int); /* yes, it's really unsigned */
1746 -extern int do_truncate(struct dentry *, loff_t start);
1747 +extern int do_truncate(struct dentry *, loff_t start, int called_from_open);
1749 extern struct file *filp_open(const char *, int, int);
1750 extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);
1751 +extern int open_namei_it(const char *filename, int namei_flags, int mode,
1752 + struct nameidata *nd, struct lookup_intent *it);
1753 +extern struct file *dentry_open_it(struct dentry *dentry, struct vfsmount *mnt,
1754 + int flags, struct lookup_intent *it);
1755 extern int filp_close(struct file *, fl_owner_t id);
1756 extern char * getname(const char *);
1758 @@ -1504,6 +1527,7 @@
1759 extern loff_t default_llseek(struct file *file, loff_t offset, int origin);
1761 extern int FASTCALL(__user_walk(const char *, unsigned, struct nameidata *));
1762 +extern int FASTCALL(__user_walk_it(const char *, unsigned, struct nameidata *, struct lookup_intent *it));
1763 extern int FASTCALL(path_init(const char *, unsigned, struct nameidata *));
1764 extern int FASTCALL(path_walk(const char *, struct nameidata *));
1765 extern int FASTCALL(path_lookup(const char *, unsigned, struct nameidata *));
1766 @@ -1516,6 +1540,8 @@
1767 extern struct dentry * lookup_hash(struct qstr *, struct dentry *);
1768 #define user_path_walk(name,nd) __user_walk(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd)
1769 #define user_path_walk_link(name,nd) __user_walk(name, LOOKUP_POSITIVE, nd)
1770 +#define user_path_walk_it(name,nd,it) __user_walk_it(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd, it)
1771 +#define user_path_walk_link_it(name,nd,it) __user_walk_it(name, LOOKUP_POSITIVE, nd, it)
1773 extern void inode_init_once(struct inode *);
1774 extern void _inode_init_once(struct inode *);
1775 @@ -1667,6 +1693,8 @@
1777 extern int vfs_readlink(struct dentry *, char *, int, const char *);
1778 extern int vfs_follow_link(struct nameidata *, const char *);
1779 +extern int vfs_follow_link_it(struct nameidata *, const char *,
1780 + struct lookup_intent *it);
1781 extern int page_readlink(struct dentry *, char *, int);
1782 extern int page_follow_link(struct dentry *, struct nameidata *);
1783 extern struct inode_operations page_symlink_inode_operations;
1784 Index: linux-2.4.21-x86_64/include/linux/fs_struct.h
1785 ===================================================================
1786 --- linux-2.4.21-x86_64.orig/include/linux/fs_struct.h 2001-07-13 15:10:44.000000000 -0700
1787 +++ linux-2.4.21-x86_64/include/linux/fs_struct.h 2004-04-12 19:57:36.000000000 -0700
1789 write_lock(&fs->lock);
1790 old_root = fs->root;
1791 old_rootmnt = fs->rootmnt;
1792 + PIN(dentry, mnt, 1);
1793 fs->rootmnt = mntget(mnt);
1794 fs->root = dget(dentry);
1795 write_unlock(&fs->lock);
1797 + UNPIN(old_root, old_rootmnt, 1);
1799 mntput(old_rootmnt);
1802 write_lock(&fs->lock);
1804 old_pwdmnt = fs->pwdmnt;
1805 + PIN(dentry, mnt, 0);
1806 fs->pwdmnt = mntget(mnt);
1807 fs->pwd = dget(dentry);
1808 write_unlock(&fs->lock);
1810 + UNPIN(old_pwd, old_pwdmnt, 0);
1814 Index: linux-2.4.21-x86_64/kernel/exit.c
1815 ===================================================================
1816 --- linux-2.4.21-x86_64.orig/kernel/exit.c 2003-10-28 10:34:13.000000000 -0800
1817 +++ linux-2.4.21-x86_64/kernel/exit.c 2004-04-12 19:57:36.000000000 -0700
1818 @@ -288,11 +288,14 @@
1820 /* No need to hold fs->lock if we are killing it */
1821 if (atomic_dec_and_test(&fs->count)) {
1822 + UNPIN(fs->pwd, fs->pwdmnt, 0);
1823 + UNPIN(fs->root, fs->rootmnt, 1);
1825 mntput(fs->rootmnt);
1829 + UNPIN(fs->altroot, fs->altrootmnt, 1);
1831 mntput(fs->altrootmnt);
1833 Index: linux-2.4.21-x86_64/kernel/fork.c
1834 ===================================================================
1835 --- linux-2.4.21-x86_64.orig/kernel/fork.c 2003-10-28 10:34:17.000000000 -0800
1836 +++ linux-2.4.21-x86_64/kernel/fork.c 2004-04-12 19:57:36.000000000 -0700
1837 @@ -461,10 +461,13 @@
1838 fs->umask = old->umask;
1839 read_lock(&old->lock);
1840 fs->rootmnt = mntget(old->rootmnt);
1841 + PIN(old->pwd, old->pwdmnt, 0);
1842 + PIN(old->root, old->rootmnt, 1);
1843 fs->root = dget(old->root);
1844 fs->pwdmnt = mntget(old->pwdmnt);
1845 fs->pwd = dget(old->pwd);
1847 + PIN(old->altroot, old->altrootmnt, 1);
1848 fs->altrootmnt = mntget(old->altrootmnt);
1849 fs->altroot = dget(old->altroot);
1851 Index: linux-2.4.21-x86_64/kernel/ksyms.c
1852 ===================================================================
1853 --- linux-2.4.21-x86_64.orig/kernel/ksyms.c 2004-04-12 19:57:33.000000000 -0700
1854 +++ linux-2.4.21-x86_64/kernel/ksyms.c 2004-04-12 19:57:36.000000000 -0700
1856 EXPORT_SYMBOL(set_page_dirty);
1857 EXPORT_SYMBOL(vfs_readlink);
1858 EXPORT_SYMBOL(vfs_follow_link);
1859 +EXPORT_SYMBOL(vfs_follow_link_it);
1860 EXPORT_SYMBOL(page_readlink);
1861 EXPORT_SYMBOL(page_follow_link);
1862 EXPORT_SYMBOL(page_symlink_inode_operations);