--- /dev/null
+ fs/dcache.c | 19 ++
+ fs/exec.c | 15 +-
+ fs/namei.c | 321 ++++++++++++++++++++++++++++++++++++++--------
+ fs/namespace.c | 28 +++-
+ fs/open.c | 123 +++++++++++++++--
+ fs/proc/base.c | 3
+ fs/stat.c | 50 ++++---
+ include/linux/dcache.h | 54 +++++++
+ include/linux/fs.h | 30 ++++
+ include/linux/fs_struct.h | 4
+ kernel/exit.c | 3
+ kernel/fork.c | 3
+ kernel/ksyms.c | 1
+ 13 files changed, 552 insertions(+), 102 deletions(-)
+
+--- linux/fs/exec.c~vfs_intent-2.4.20-hp Sat Jul 12 14:04:49 2003
++++ linux-mmonroe/fs/exec.c Sat Jul 12 14:05:24 2003
+@@ -116,8 +116,9 @@ asmlinkage long sys_uselib(const char *
+ struct file * file;
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_OPEN, .it_flags = O_RDONLY };
+
+- error = user_path_walk(library, &nd);
++ error = user_path_walk_it(library, &nd, &it);
+ if (error)
+ goto out;
+
+@@ -129,7 +130,8 @@ asmlinkage long sys_uselib(const char *
+ if (error)
+ goto exit;
+
+- file = dentry_open(nd.dentry, nd.mnt, O_RDONLY);
++ file = dentry_open_it(nd.dentry, nd.mnt, O_RDONLY, &it);
++ intent_release(&it);
+ error = PTR_ERR(file);
+ if (IS_ERR(file))
+ goto out;
+@@ -372,8 +374,9 @@ struct file *open_exec(const char *name)
+ struct inode *inode;
+ struct file *file;
+ int err = 0;
++ struct lookup_intent it = { .it_op = IT_OPEN, .it_flags = O_RDONLY };
+
+- err = path_lookup(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd);
++ err = path_lookup_it(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd, &it);
+ file = ERR_PTR(err);
+ if (!err) {
+ inode = nd.dentry->d_inode;
+@@ -385,7 +388,8 @@ struct file *open_exec(const char *name)
+ err = -EACCES;
+ file = ERR_PTR(err);
+ if (!err) {
+- file = dentry_open(nd.dentry, nd.mnt, O_RDONLY);
++ file = dentry_open_it(nd.dentry, nd.mnt, O_RDONLY, &it);
++ intent_release(&it);
+ if (!IS_ERR(file)) {
+ err = deny_write_access(file);
+ if (err) {
+@@ -397,6 +401,7 @@ out:
+ return file;
+ }
+ }
++ intent_release(&it);
+ path_release(&nd);
+ }
+ goto out;
+@@ -1128,7 +1133,7 @@ int do_coredump(long signr, struct pt_re
+ goto close_fail;
+ if (!file->f_op->write)
+ goto close_fail;
+- if (do_truncate(file->f_dentry, 0) != 0)
++ if (do_truncate(file->f_dentry, 0, 0) != 0)
+ goto close_fail;
+
+ retval = binfmt->core_dump(signr, regs, file);
+--- linux/fs/dcache.c~vfs_intent-2.4.20-hp Thu Nov 28 15:53:15 2002
++++ linux-mmonroe/fs/dcache.c Sat Jul 12 14:05:24 2003
+@@ -181,6 +181,13 @@ int d_invalidate(struct dentry * dentry)
+ spin_unlock(&dcache_lock);
+ return 0;
+ }
++
++ /* network invalidation by Lustre */
++ if (dentry->d_flags & DCACHE_LUSTRE_INVALID) {
++ spin_unlock(&dcache_lock);
++ return 0;
++ }
++
+ /*
+ * Check whether to do a partial shrink_dcache
+ * to get rid of unused child entries.
+@@ -830,13 +837,19 @@ void d_delete(struct dentry * dentry)
+ * Adds a dentry to the hash according to its name.
+ */
+
+-void d_rehash(struct dentry * entry)
++void __d_rehash(struct dentry * entry, int lock)
+ {
+ struct list_head *list = d_hash(entry->d_parent, entry->d_name.hash);
+ if (!list_empty(&entry->d_hash)) BUG();
+- spin_lock(&dcache_lock);
++ if (lock) spin_lock(&dcache_lock);
+ list_add(&entry->d_hash, list);
+- spin_unlock(&dcache_lock);
++ if (lock) spin_unlock(&dcache_lock);
++}
++EXPORT_SYMBOL(__d_rehash);
++
++void d_rehash(struct dentry * entry)
++{
++ __d_rehash(entry, 1);
+ }
+
+ #define do_switch(x,y) do { \
+--- linux/fs/namespace.c~vfs_intent-2.4.20-hp Thu Nov 28 15:53:15 2002
++++ linux-mmonroe/fs/namespace.c Sat Jul 12 14:05:24 2003
+@@ -99,6 +99,7 @@ static void detach_mnt(struct vfsmount *
+ {
+ old_nd->dentry = mnt->mnt_mountpoint;
+ old_nd->mnt = mnt->mnt_parent;
++ UNPIN(old_nd->dentry, old_nd->mnt, 1);
+ mnt->mnt_parent = mnt;
+ mnt->mnt_mountpoint = mnt->mnt_root;
+ list_del_init(&mnt->mnt_child);
+@@ -110,6 +111,7 @@ static void attach_mnt(struct vfsmount *
+ {
+ mnt->mnt_parent = mntget(nd->mnt);
+ mnt->mnt_mountpoint = dget(nd->dentry);
++ PIN(nd->dentry, nd->mnt, 1);
+ list_add(&mnt->mnt_hash, mount_hashtable+hash(nd->mnt, nd->dentry));
+ list_add(&mnt->mnt_child, &nd->mnt->mnt_mounts);
+ nd->dentry->d_mounted++;
+@@ -485,14 +487,17 @@ static int do_loopback(struct nameidata
+ {
+ struct nameidata old_nd;
+ struct vfsmount *mnt = NULL;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+ int err = mount_is_safe(nd);
+ if (err)
+ return err;
+ if (!old_name || !*old_name)
+ return -EINVAL;
+- err = path_lookup(old_name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &old_nd);
+- if (err)
++ err = path_lookup_it(old_name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &old_nd, &it);
++ if (err) {
++ intent_release(&it);
+ return err;
++ }
+
+ down_write(¤t->namespace->sem);
+ err = -EINVAL;
+@@ -515,6 +520,7 @@ static int do_loopback(struct nameidata
+ }
+
+ up_write(¤t->namespace->sem);
++ intent_release(&it);
+ path_release(&old_nd);
+ return err;
+ }
+@@ -698,6 +704,7 @@ long do_mount(char * dev_name, char * di
+ unsigned long flags, void *data_page)
+ {
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+ int retval = 0;
+ int mnt_flags = 0;
+
+@@ -722,10 +729,11 @@ long do_mount(char * dev_name, char * di
+ flags &= ~(MS_NOSUID|MS_NOEXEC|MS_NODEV);
+
+ /* ... and get the mountpoint */
+- retval = path_lookup(dir_name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd);
+- if (retval)
++ retval = path_lookup_it(dir_name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd, &it);
++ if (retval) {
++ intent_release(&it);
+ return retval;
+-
++ }
+ if (flags & MS_REMOUNT)
+ retval = do_remount(&nd, flags & ~MS_REMOUNT, mnt_flags,
+ data_page);
+@@ -736,6 +744,8 @@ long do_mount(char * dev_name, char * di
+ else
+ retval = do_add_mount(&nd, type_page, flags, mnt_flags,
+ dev_name, data_page);
++
++ intent_release(&it);
+ path_release(&nd);
+ return retval;
+ }
+@@ -901,6 +911,8 @@ asmlinkage long sys_pivot_root(const cha
+ {
+ struct vfsmount *tmp;
+ struct nameidata new_nd, old_nd, parent_nd, root_parent, user_nd;
++ struct lookup_intent new_it = { .it_op = IT_GETATTR };
++ struct lookup_intent old_it = { .it_op = IT_GETATTR };
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+@@ -908,14 +920,14 @@ asmlinkage long sys_pivot_root(const cha
+
+ lock_kernel();
+
+- error = __user_walk(new_root, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &new_nd);
++ error = __user_walk_it(new_root, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &new_nd, &new_it);
+ if (error)
+ goto out0;
+ error = -EINVAL;
+ if (!check_mnt(new_nd.mnt))
+ goto out1;
+
+- error = __user_walk(put_old, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &old_nd);
++ error = __user_walk_it(put_old, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &old_nd, &old_it);
+ if (error)
+ goto out1;
+
+@@ -970,8 +982,10 @@ out2:
+ up(&old_nd.dentry->d_inode->i_zombie);
+ up_write(¤t->namespace->sem);
+ path_release(&user_nd);
++ intent_release(&old_it);
+ path_release(&old_nd);
+ out1:
++ intent_release(&new_it);
+ path_release(&new_nd);
+ out0:
+ unlock_kernel();
+--- linux/fs/namei.c~vfs_intent-2.4.20-hp Sat Jul 12 14:04:48 2003
++++ linux-mmonroe/fs/namei.c Sat Jul 12 14:08:01 2003
+@@ -94,6 +94,13 @@
+ * XEmacs seems to be relying on it...
+ */
+
++void intent_release(struct lookup_intent *it)
++{
++ if (it && it->it_op_release)
++ it->it_op_release(it);
++
++}
++
+ /* In order to reduce some races, while at the same time doing additional
+ * checking and hopefully speeding things up, we copy filenames to the
+ * kernel data space before using them..
+@@ -260,10 +267,19 @@ void path_release(struct nameidata *nd)
+ * Internal lookup() using the new generic dcache.
+ * SMP-safe
+ */
+-static struct dentry * cached_lookup(struct dentry * parent, struct qstr * name, int flags)
++static struct dentry *cached_lookup(struct dentry *parent, struct qstr *name,
++ int flags, struct lookup_intent *it)
+ {
+ struct dentry * dentry = d_lookup(parent, name);
+
++ if (dentry && dentry->d_op && dentry->d_op->d_revalidate_it) {
++ if (!dentry->d_op->d_revalidate_it(dentry, flags, it) &&
++ !d_invalidate(dentry)) {
++ dput(dentry);
++ dentry = NULL;
++ }
++ return dentry;
++ } else
+ if (dentry && dentry->d_op && dentry->d_op->d_revalidate) {
+ if (!dentry->d_op->d_revalidate(dentry, flags) && !d_invalidate(dentry)) {
+ dput(dentry);
+@@ -281,11 +297,14 @@ static struct dentry * cached_lookup(str
+ * make sure that nobody added the entry to the dcache in the meantime..
+ * SMP-safe
+ */
+-static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, int flags)
++static struct dentry *real_lookup(struct dentry *parent, struct qstr *name,
++ int flags, struct lookup_intent *it)
+ {
+ struct dentry * result;
+ struct inode *dir = parent->d_inode;
+
++again:
++
+ down(&dir->i_sem);
+ /*
+ * First re-do the cached lookup just in case it was created
+@@ -300,6 +319,9 @@ static struct dentry * real_lookup(struc
+ result = ERR_PTR(-ENOMEM);
+ if (dentry) {
+ lock_kernel();
++ if (dir->i_op->lookup_it)
++ result = dir->i_op->lookup_it(dir, dentry, it, flags);
++ else
+ result = dir->i_op->lookup(dir, dentry);
+ unlock_kernel();
+ if (result)
+@@ -321,6 +343,12 @@ static struct dentry * real_lookup(struc
+ dput(result);
+ result = ERR_PTR(-ENOENT);
+ }
++ } else if (result->d_op && result->d_op->d_revalidate_it) {
++ if (!result->d_op->d_revalidate_it(result, flags, it) &&
++ !d_invalidate(result)) {
++ dput(result);
++ goto again;
++ }
+ }
+ return result;
+ }
+@@ -332,7 +360,8 @@ static struct dentry * real_lookup(struc
+ * Without that kind of total limit, nasty chains of consecutive
+ * symlinks can cause almost arbitrarily long lookups.
+ */
+-static inline int do_follow_link(struct dentry *dentry, struct nameidata *nd)
++static inline int do_follow_link(struct dentry *dentry, struct nameidata *nd,
++ struct lookup_intent *it)
+ {
+ int err;
+ if (current->link_count >= 5)
+@@ -346,10 +375,18 @@ static inline int do_follow_link(struct
+ current->link_count++;
+ current->total_link_count++;
+ UPDATE_ATIME(dentry->d_inode);
++ nd->it = it;
+ err = dentry->d_inode->i_op->follow_link(dentry, nd);
++ if (!err && it != NULL && !(it->it_int_flags & IT_FL_FOLLOWED)) {
++ /* vfs_follow_link was never called */
++ intent_release(it);
++ path_release(nd);
++ err = -ENOLINK;
++ }
+ current->link_count--;
+ return err;
+ loop:
++ intent_release(it);
+ path_release(nd);
+ return -ELOOP;
+ }
+@@ -379,15 +416,26 @@ int follow_up(struct vfsmount **mnt, str
+ return __follow_up(mnt, dentry);
+ }
+
+-static inline int __follow_down(struct vfsmount **mnt, struct dentry **dentry)
++static inline int __follow_down(struct vfsmount **mnt, struct dentry **dentry,
++ struct lookup_intent *it)
+ {
+ struct vfsmount *mounted;
+
+ spin_lock(&dcache_lock);
+ mounted = lookup_mnt(*mnt, *dentry);
+ if (mounted) {
++ int opc = 0, mode = 0;
+ *mnt = mntget(mounted);
+ spin_unlock(&dcache_lock);
++ if (it) {
++ opc = it->it_op;
++ mode = it->it_mode;
++ }
++ intent_release(it);
++ if (it) {
++ it->it_op = opc;
++ it->it_mode = mode;
++ }
+ dput(*dentry);
+ mntput(mounted->mnt_parent);
+ *dentry = dget(mounted->mnt_root);
+@@ -399,7 +447,7 @@ static inline int __follow_down(struct v
+
+ int follow_down(struct vfsmount **mnt, struct dentry **dentry)
+ {
+- return __follow_down(mnt,dentry);
++ return __follow_down(mnt,dentry,NULL);
+ }
+
+ static inline void follow_dotdot(struct nameidata *nd)
+@@ -435,7 +483,7 @@ static inline void follow_dotdot(struct
+ mntput(nd->mnt);
+ nd->mnt = parent;
+ }
+- while (d_mountpoint(nd->dentry) && __follow_down(&nd->mnt, &nd->dentry))
++ while (d_mountpoint(nd->dentry) && __follow_down(&nd->mnt, &nd->dentry, NULL))
+ ;
+ }
+
+@@ -447,7 +495,8 @@ static inline void follow_dotdot(struct
+ *
+ * We expect 'base' to be positive and a directory.
+ */
+-int link_path_walk(const char * name, struct nameidata *nd)
++int link_path_walk_it(const char *name, struct nameidata *nd,
++ struct lookup_intent *it)
+ {
+ struct dentry *dentry;
+ struct inode *inode;
+@@ -520,15 +569,15 @@ int link_path_walk(const char * name, st
+ break;
+ }
+ /* This does the actual lookups.. */
+- dentry = cached_lookup(nd->dentry, &this, LOOKUP_CONTINUE);
++ dentry = cached_lookup(nd->dentry, &this, LOOKUP_CONTINUE, NULL);
+ if (!dentry) {
+- dentry = real_lookup(nd->dentry, &this, LOOKUP_CONTINUE);
++ dentry = real_lookup(nd->dentry, &this, LOOKUP_CONTINUE, NULL);
+ err = PTR_ERR(dentry);
+ if (IS_ERR(dentry))
+ break;
+ }
+ /* Check mountpoints.. */
+- while (d_mountpoint(dentry) && __follow_down(&nd->mnt, &dentry))
++ while (d_mountpoint(dentry) && __follow_down(&nd->mnt, &dentry, NULL))
+ ;
+
+ err = -ENOENT;
+@@ -540,7 +589,7 @@ int link_path_walk(const char * name, st
+ goto out_dput;
+
+ if (inode->i_op->follow_link) {
+- err = do_follow_link(dentry, nd);
++ err = do_follow_link(dentry, nd, NULL);
+ dput(dentry);
+ if (err)
+ goto return_err;
+@@ -556,7 +605,7 @@ int link_path_walk(const char * name, st
+ nd->dentry = dentry;
+ }
+ err = -ENOTDIR;
+- if (!inode->i_op->lookup)
++ if (!inode->i_op->lookup && !inode->i_op->lookup_it)
+ break;
+ continue;
+ /* here ends the main loop */
+@@ -583,19 +632,19 @@ last_component:
+ if (err < 0)
+ break;
+ }
+- dentry = cached_lookup(nd->dentry, &this, 0);
++ dentry = cached_lookup(nd->dentry, &this, 0, it);
+ if (!dentry) {
+- dentry = real_lookup(nd->dentry, &this, 0);
++ dentry = real_lookup(nd->dentry, &this, 0, it);
+ err = PTR_ERR(dentry);
+ if (IS_ERR(dentry))
+ break;
+ }
+- while (d_mountpoint(dentry) && __follow_down(&nd->mnt, &dentry))
++ while (d_mountpoint(dentry) && __follow_down(&nd->mnt, &dentry, it))
+ ;
+ inode = dentry->d_inode;
+ if ((lookup_flags & LOOKUP_FOLLOW)
+ && inode && inode->i_op && inode->i_op->follow_link) {
+- err = do_follow_link(dentry, nd);
++ err = do_follow_link(dentry, nd, it);
+ dput(dentry);
+ if (err)
+ goto return_err;
+@@ -609,7 +658,8 @@ last_component:
+ goto no_inode;
+ if (lookup_flags & LOOKUP_DIRECTORY) {
+ err = -ENOTDIR;
+- if (!inode->i_op || !inode->i_op->lookup)
++ if (!inode->i_op ||
++ (!inode->i_op->lookup && !inode->i_op->lookup_it))
+ break;
+ }
+ goto return_base;
+@@ -633,6 +683,23 @@ return_reval:
+ * Check the cached dentry for staleness.
+ */
+ dentry = nd->dentry;
++ revalidate_again:
++ if (dentry && dentry->d_op && dentry->d_op->d_revalidate_it) {
++ err = -ESTALE;
++ if (!dentry->d_op->d_revalidate_it(dentry, 0, it)) {
++ struct dentry *new;
++ err = permission(dentry->d_parent->d_inode,
++ MAY_EXEC);
++ if (err)
++ break;
++ new = real_lookup(dentry->d_parent,
++ &dentry->d_name, 0, NULL);
++ d_invalidate(dentry);
++ dput(dentry);
++ dentry = new;
++ goto revalidate_again;
++ }
++ } else
+ if (dentry && dentry->d_op && dentry->d_op->d_revalidate) {
+ err = -ESTALE;
+ if (!dentry->d_op->d_revalidate(dentry, 0)) {
+@@ -646,15 +713,28 @@ out_dput:
+ dput(dentry);
+ break;
+ }
++ if (err)
++ intent_release(it);
+ path_release(nd);
+ return_err:
+ return err;
+ }
+
++int link_path_walk(const char * name, struct nameidata *nd)
++{
++ return link_path_walk_it(name, nd, NULL);
++}
++
++int path_walk_it(const char * name, struct nameidata *nd, struct lookup_intent *it)
++{
++ current->total_link_count = 0;
++ return link_path_walk_it(name, nd, it);
++}
++
+ int path_walk(const char * name, struct nameidata *nd)
+ {
+ current->total_link_count = 0;
+- return link_path_walk(name, nd);
++ return link_path_walk_it(name, nd, NULL);
+ }
+
+ /* SMP-safe */
+@@ -739,6 +819,17 @@ walk_init_root(const char *name, struct
+ }
+
+ /* SMP-safe */
++int path_lookup_it(const char *path, unsigned flags, struct nameidata *nd,
++ struct lookup_intent *it)
++{
++ int error = 0;
++ if (path_init(path, flags, nd))
++ error = path_walk_it(path, nd, it);
++ return error;
++}
++
++
++/* SMP-safe */
+ int path_lookup(const char *path, unsigned flags, struct nameidata *nd)
+ {
+ int error = 0;
+@@ -753,6 +844,7 @@ int path_init(const char *name, unsigned
+ {
+ nd->last_type = LAST_ROOT; /* if there are only slashes... */
+ nd->flags = flags;
++ nd->it = NULL;
+ if (*name=='/')
+ return walk_init_root(name,nd);
+ read_lock(¤t->fs->lock);
+@@ -767,7 +859,8 @@ int path_init(const char *name, unsigned
+ * needs parent already locked. Doesn't follow mounts.
+ * SMP-safe.
+ */
+-struct dentry * lookup_hash(struct qstr *name, struct dentry * base)
++struct dentry * lookup_hash_it(struct qstr *name, struct dentry * base,
++ struct lookup_intent *it)
+ {
+ struct dentry * dentry;
+ struct inode *inode;
+@@ -790,13 +883,16 @@ struct dentry * lookup_hash(struct qstr
+ goto out;
+ }
+
+- dentry = cached_lookup(base, name, 0);
++ dentry = cached_lookup(base, name, 0, it);
+ if (!dentry) {
+ struct dentry *new = d_alloc(base, name);
+ dentry = ERR_PTR(-ENOMEM);
+ if (!new)
+ goto out;
+ lock_kernel();
++ if (inode->i_op->lookup_it)
++ dentry = inode->i_op->lookup_it(inode, new, it, 0);
++ else
+ dentry = inode->i_op->lookup(inode, new);
+ unlock_kernel();
+ if (!dentry)
+@@ -808,6 +904,12 @@ out:
+ return dentry;
+ }
+
++struct dentry * lookup_hash(struct qstr *name, struct dentry * base)
++{
++ return lookup_hash_it(name, base, NULL);
++}
++
++
+ /* SMP-safe */
+ struct dentry * lookup_one_len(const char * name, struct dentry * base, int len)
+ {
+@@ -829,7 +931,7 @@ struct dentry * lookup_one_len(const cha
+ }
+ this.hash = end_name_hash(hash);
+
+- return lookup_hash(&this, base);
++ return lookup_hash_it(&this, base, NULL);
+ access:
+ return ERR_PTR(-EACCES);
+ }
+@@ -860,6 +962,23 @@ int __user_walk(const char *name, unsign
+ return err;
+ }
+
++int __user_walk_it(const char *name, unsigned flags, struct nameidata *nd,
++ struct lookup_intent *it)
++{
++ char *tmp;
++ int err;
++
++ tmp = getname(name);
++ err = PTR_ERR(tmp);
++ if (!IS_ERR(tmp)) {
++ err = 0;
++ if (path_init(tmp, flags, nd))
++ err = path_walk_it(tmp, nd, it);
++ putname(tmp);
++ }
++ return err;
++}
++
+ /*
+ * It's inline, so penalty for filesystems that don't use sticky bit is
+ * minimal.
+@@ -955,7 +1074,8 @@ static inline int lookup_flags(unsigned
+ return retval;
+ }
+
+-int vfs_create(struct inode *dir, struct dentry *dentry, int mode)
++static int vfs_create_it(struct inode *dir, struct dentry *dentry, int mode,
++ struct lookup_intent *it)
+ {
+ int error;
+
+@@ -968,12 +1088,15 @@ int vfs_create(struct inode *dir, struct
+ goto exit_lock;
+
+ error = -EACCES; /* shouldn't it be ENOSYS? */
+- if (!dir->i_op || !dir->i_op->create)
++ if (!dir->i_op || (!dir->i_op->create && !dir->i_op->create_it))
+ goto exit_lock;
+
+ DQUOT_INIT(dir);
+ lock_kernel();
+- error = dir->i_op->create(dir, dentry, mode);
++ if (dir->i_op->create_it)
++ error = dir->i_op->create_it(dir, dentry, mode, it);
++ else
++ error = dir->i_op->create(dir, dentry, mode);
+ unlock_kernel();
+ exit_lock:
+ up(&dir->i_zombie);
+@@ -982,6 +1105,11 @@ exit_lock:
+ return error;
+ }
+
++int vfs_create(struct inode *dir, struct dentry *dentry, int mode)
++{
++ return vfs_create_it(dir, dentry, mode, NULL);
++}
++
+ /*
+ * open_namei()
+ *
+@@ -996,7 +1124,8 @@ exit_lock:
+ * for symlinks (where the permissions are checked later).
+ * SMP-safe
+ */
+-int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd)
++int open_namei_it(const char *pathname, int flag, int mode,
++ struct nameidata *nd, struct lookup_intent *it)
+ {
+ int acc_mode, error = 0;
+ struct inode *inode;
+@@ -1010,7 +1139,7 @@ int open_namei(const char * pathname, in
+ * The simplest case - just a plain lookup.
+ */
+ if (!(flag & O_CREAT)) {
+- error = path_lookup(pathname, lookup_flags(flag), nd);
++ error = path_lookup_it(pathname, lookup_flags(flag), nd, it);
+ if (error)
+ return error;
+ dentry = nd->dentry;
+@@ -1020,6 +1149,10 @@ int open_namei(const char * pathname, in
+ /*
+ * Create - we need to know the parent.
+ */
++ if (it) {
++ it->it_mode = mode;
++ it->it_op |= IT_CREAT;
++ }
+ error = path_lookup(pathname, LOOKUP_PARENT, nd);
+ if (error)
+ return error;
+@@ -1035,7 +1168,7 @@ int open_namei(const char * pathname, in
+
+ dir = nd->dentry;
+ down(&dir->d_inode->i_sem);
+- dentry = lookup_hash(&nd->last, nd->dentry);
++ dentry = lookup_hash_it(&nd->last, nd->dentry, it);
+
+ do_last:
+ error = PTR_ERR(dentry);
+@@ -1044,11 +1177,12 @@ do_last:
+ goto exit;
+ }
+
++ it->it_mode = mode;
+ /* Negative dentry, just create the file */
+ if (!dentry->d_inode) {
+ if (!IS_POSIXACL(dir->d_inode))
+ mode &= ~current->fs->umask;
+- error = vfs_create(dir->d_inode, dentry, mode);
++ error = vfs_create_it(dir->d_inode, dentry, mode, it);
+ up(&dir->d_inode->i_sem);
+ dput(nd->dentry);
+ nd->dentry = dentry;
+@@ -1073,7 +1207,7 @@ do_last:
+ error = -ELOOP;
+ if (flag & O_NOFOLLOW)
+ goto exit_dput;
+- while (__follow_down(&nd->mnt,&dentry) && d_mountpoint(dentry));
++ while (__follow_down(&nd->mnt,&dentry,it) && d_mountpoint(dentry));
+ }
+ error = -ENOENT;
+ if (!dentry->d_inode)
+@@ -1152,7 +1286,7 @@ ok:
+ if (!error) {
+ DQUOT_INIT(inode);
+
+- error = do_truncate(dentry, 0);
++ error = do_truncate(dentry, 0, 1);
+ }
+ put_write_access(inode);
+ if (error)
+@@ -1164,8 +1298,10 @@ ok:
+ return 0;
+
+ exit_dput:
++ intent_release(it);
+ dput(dentry);
+ exit:
++ intent_release(it);
+ path_release(nd);
+ return error;
+
+@@ -1184,7 +1320,16 @@ do_link:
+ * are done. Procfs-like symlinks just set LAST_BIND.
+ */
+ UPDATE_ATIME(dentry->d_inode);
++ nd->it = it;
+ error = dentry->d_inode->i_op->follow_link(dentry, nd);
++ if (error) {
++ intent_release(it);
++ } else if (it != NULL && !(it->it_int_flags & IT_FL_FOLLOWED)) {
++ /* vfs_follow_link was never called */
++ intent_release(it);
++ path_release(nd);
++ error = -ENOLINK;
++ }
+ dput(dentry);
+ if (error)
+ return error;
+@@ -1206,13 +1351,20 @@ do_link:
+ }
+ dir = nd->dentry;
+ down(&dir->d_inode->i_sem);
+- dentry = lookup_hash(&nd->last, nd->dentry);
++ dentry = lookup_hash_it(&nd->last, nd->dentry, it);
+ putname(nd->last.name);
+ goto do_last;
+ }
+
++int open_namei(const char *pathname, int flag, int mode, struct nameidata *nd)
++{
++ return open_namei_it(pathname, flag, mode, nd, NULL);
++}
++
++
+ /* SMP-safe */
+-static struct dentry *lookup_create(struct nameidata *nd, int is_dir)
++static struct dentry *lookup_create(struct nameidata *nd, int is_dir,
++ struct lookup_intent *it)
+ {
+ struct dentry *dentry;
+
+@@ -1220,7 +1372,7 @@ static struct dentry *lookup_create(stru
+ dentry = ERR_PTR(-EEXIST);
+ if (nd->last_type != LAST_NORM)
+ goto fail;
+- dentry = lookup_hash(&nd->last, nd->dentry);
++ dentry = lookup_hash_it(&nd->last, nd->dentry, it);
+ if (IS_ERR(dentry))
+ goto fail;
+ if (!is_dir && nd->last.name[nd->last.len] && !dentry->d_inode)
+@@ -1276,7 +1428,16 @@ asmlinkage long sys_mknod(const char * f
+ error = path_lookup(tmp, LOOKUP_PARENT, &nd);
+ if (error)
+ goto out;
+- dentry = lookup_create(&nd, 0);
++
++ if (nd.dentry->d_inode->i_op->mknod_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->mknod_raw(&nd, mode, dev);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto out2;
++ }
++
++ dentry = lookup_create(&nd, 0, NULL);
+ error = PTR_ERR(dentry);
+
+ if (!IS_POSIXACL(nd.dentry->d_inode))
+@@ -1298,6 +1459,7 @@ asmlinkage long sys_mknod(const char * f
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
++out2:
+ path_release(&nd);
+ out:
+ putname(tmp);
+@@ -1345,7 +1507,14 @@ asmlinkage long sys_mkdir(const char * p
+ error = path_lookup(tmp, LOOKUP_PARENT, &nd);
+ if (error)
+ goto out;
+- dentry = lookup_create(&nd, 1);
++ if (nd.dentry->d_inode->i_op->mkdir_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->mkdir_raw(&nd, mode);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto out2;
++ }
++ dentry = lookup_create(&nd, 1, NULL);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ if (!IS_POSIXACL(nd.dentry->d_inode))
+@@ -1354,6 +1523,7 @@ asmlinkage long sys_mkdir(const char * p
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
++out2:
+ path_release(&nd);
+ out:
+ putname(tmp);
+@@ -1454,8 +1624,16 @@ asmlinkage long sys_rmdir(const char * p
+ error = -EBUSY;
+ goto exit1;
+ }
++ if (nd.dentry->d_inode->i_op->rmdir_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++
++ error = op->rmdir_raw(&nd);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto exit1;
++ }
+ down(&nd.dentry->d_inode->i_sem);
+- dentry = lookup_hash(&nd.last, nd.dentry);
++ dentry = lookup_hash_it(&nd.last, nd.dentry, NULL);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ error = vfs_rmdir(nd.dentry->d_inode, dentry);
+@@ -1513,8 +1691,15 @@ asmlinkage long sys_unlink(const char *
+ error = -EISDIR;
+ if (nd.last_type != LAST_NORM)
+ goto exit1;
++ if (nd.dentry->d_inode->i_op->unlink_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->unlink_raw(&nd);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto exit1;
++ }
+ down(&nd.dentry->d_inode->i_sem);
+- dentry = lookup_hash(&nd.last, nd.dentry);
++ dentry = lookup_hash_it(&nd.last, nd.dentry, NULL);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ /* Why not before? Because we want correct error value */
+@@ -1581,15 +1766,23 @@ asmlinkage long sys_symlink(const char *
+ error = path_lookup(to, LOOKUP_PARENT, &nd);
+ if (error)
+ goto out;
+- dentry = lookup_create(&nd, 0);
++ if (nd.dentry->d_inode->i_op->symlink_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->symlink_raw(&nd, from);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto out2;
++ }
++ dentry = lookup_create(&nd, 0, NULL);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ error = vfs_symlink(nd.dentry->d_inode, dentry, from);
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
++ out2:
+ path_release(&nd);
+-out:
++ out:
+ putname(to);
+ }
+ putname(from);
+@@ -1665,7 +1858,14 @@ asmlinkage long sys_link(const char * ol
+ error = -EXDEV;
+ if (old_nd.mnt != nd.mnt)
+ goto out_release;
+- new_dentry = lookup_create(&nd, 0);
++ if (nd.dentry->d_inode->i_op->link_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->link_raw(&old_nd, &nd);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto out_release;
++ }
++ new_dentry = lookup_create(&nd, 0, NULL);
+ error = PTR_ERR(new_dentry);
+ if (!IS_ERR(new_dentry)) {
+ error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
+@@ -1709,7 +1909,7 @@ exit:
+ * locking].
+ */
+ int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
+- struct inode *new_dir, struct dentry *new_dentry)
++ struct inode *new_dir, struct dentry *new_dentry)
+ {
+ int error;
+ struct inode *target;
+@@ -1788,7 +1988,7 @@ out_unlock:
+ }
+
+ int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
+- struct inode *new_dir, struct dentry *new_dentry)
++ struct inode *new_dir, struct dentry *new_dentry)
+ {
+ int error;
+
+@@ -1876,9 +2076,18 @@ static inline int do_rename(const char *
+ if (newnd.last_type != LAST_NORM)
+ goto exit2;
+
++ if (old_dir->d_inode->i_op->rename_raw) {
++ lock_kernel();
++ error = old_dir->d_inode->i_op->rename_raw(&oldnd, &newnd);
++ unlock_kernel();
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto exit2;
++ }
++
+ double_lock(new_dir, old_dir);
+
+- old_dentry = lookup_hash(&oldnd.last, old_dir);
++ old_dentry = lookup_hash_it(&oldnd.last, old_dir, NULL);
+ error = PTR_ERR(old_dentry);
+ if (IS_ERR(old_dentry))
+ goto exit3;
+@@ -1894,16 +2103,16 @@ static inline int do_rename(const char *
+ if (newnd.last.name[newnd.last.len])
+ goto exit4;
+ }
+- new_dentry = lookup_hash(&newnd.last, new_dir);
++ new_dentry = lookup_hash_it(&newnd.last, new_dir, NULL);
+ error = PTR_ERR(new_dentry);
+ if (IS_ERR(new_dentry))
+ goto exit4;
+
++
+ lock_kernel();
+ error = vfs_rename(old_dir->d_inode, old_dentry,
+ new_dir->d_inode, new_dentry);
+ unlock_kernel();
+-
+ dput(new_dentry);
+ exit4:
+ dput(old_dentry);
+@@ -1954,20 +2163,28 @@ out:
+ }
+
+ static inline int
+-__vfs_follow_link(struct nameidata *nd, const char *link)
++__vfs_follow_link(struct nameidata *nd, const char *link,
++ struct lookup_intent *it)
+ {
+ int res = 0;
+ char *name;
+ if (IS_ERR(link))
+ goto fail;
+
++ if (it == NULL)
++ it = nd->it;
++ else if (it != nd->it)
++ printk("it != nd->it: tell phil@clusterfs.com\n");
++ if (it != NULL)
++ it->it_int_flags |= IT_FL_FOLLOWED;
++
+ if (*link == '/') {
+ path_release(nd);
+ if (!walk_init_root(link, nd))
+ /* weird __emul_prefix() stuff did it */
+ goto out;
+ }
+- res = link_path_walk(link, nd);
++ res = link_path_walk_it(link, nd, it);
+ out:
+ if (current->link_count || res || nd->last_type!=LAST_NORM)
+ return res;
+@@ -1989,7 +2206,13 @@ fail:
+
+ int vfs_follow_link(struct nameidata *nd, const char *link)
+ {
+- return __vfs_follow_link(nd, link);
++ return __vfs_follow_link(nd, link, NULL);
++}
++
++int vfs_follow_link_it(struct nameidata *nd, const char *link,
++ struct lookup_intent *it)
++{
++ return __vfs_follow_link(nd, link, it);
+ }
+
+ /* get the link contents into pagecache */
+@@ -2031,7 +2254,7 @@ int page_follow_link(struct dentry *dent
+ {
+ struct page *page = NULL;
+ char *s = page_getlink(dentry, &page);
+- int res = __vfs_follow_link(nd, s);
++ int res = __vfs_follow_link(nd, s, NULL);
+ if (page) {
+ kunmap(page);
+ page_cache_release(page);
+--- linux/fs/open.c~vfs_intent-2.4.20-hp Thu Nov 28 15:53:15 2002
++++ linux-mmonroe/fs/open.c Sat Jul 12 14:05:24 2003
+@@ -19,6 +19,8 @@
+ #include <asm/uaccess.h>
+
+ #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m))
++extern int path_walk_it(const char *name, struct nameidata *nd,
++ struct lookup_intent *it);
+
+ int vfs_statfs(struct super_block *sb, struct statfs *buf)
+ {
+@@ -95,9 +97,10 @@ void fd_install(unsigned int fd, struct
+ write_unlock(&files->file_lock);
+ }
+
+-int do_truncate(struct dentry *dentry, loff_t length)
++int do_truncate(struct dentry *dentry, loff_t length, int called_from_open)
+ {
+ struct inode *inode = dentry->d_inode;
++ struct inode_operations *op = dentry->d_inode->i_op;
+ int error;
+ struct iattr newattrs;
+
+@@ -108,7 +111,13 @@ int do_truncate(struct dentry *dentry, l
+ down(&inode->i_sem);
+ newattrs.ia_size = length;
+ newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
+- error = notify_change(dentry, &newattrs);
++ if (called_from_open)
++ newattrs.ia_valid |= ATTR_FROM_OPEN;
++ if (op->setattr_raw) {
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ } else
++ error = notify_change(dentry, &newattrs);
+ up(&inode->i_sem);
+ return error;
+ }
+@@ -118,12 +127,13 @@ static inline long do_sys_truncate(const
+ struct nameidata nd;
+ struct inode * inode;
+ int error;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+ error = -EINVAL;
+ if (length < 0) /* sorry, but loff_t says... */
+ goto out;
+
+- error = user_path_walk(path, &nd);
++ error = user_path_walk_it(path, &nd, &it);
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+@@ -163,11 +173,13 @@ static inline long do_sys_truncate(const
+ error = locks_verify_truncate(inode, NULL, length);
+ if (!error) {
+ DQUOT_INIT(inode);
+- error = do_truncate(nd.dentry, length);
++ intent_release(&it);
++ error = do_truncate(nd.dentry, length, 0);
+ }
+ put_write_access(inode);
+
+ dput_and_out:
++ intent_release(&it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -215,7 +227,7 @@ static inline long do_sys_ftruncate(unsi
+
+ error = locks_verify_truncate(inode, file, length);
+ if (!error)
+- error = do_truncate(dentry, length);
++ error = do_truncate(dentry, length, 0);
+ out_putf:
+ fput(file);
+ out:
+@@ -260,11 +272,13 @@ asmlinkage long sys_utime(char * filenam
+ struct inode * inode;
+ struct iattr newattrs;
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, NULL);
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+
++ /* this is safe without a Lustre lock because it only depends
++ on the super block */
+ error = -EROFS;
+ if (IS_RDONLY(inode))
+ goto dput_and_out;
+@@ -279,11 +293,25 @@ asmlinkage long sys_utime(char * filenam
+ goto dput_and_out;
+
+ newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
+- } else {
++ }
++
++ if (inode->i_op->setattr_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto dput_and_out;
++ }
++
++ error = -EPERM;
++ if (!times) {
+ if (current->fsuid != inode->i_uid &&
+ (error = permission(inode,MAY_WRITE)) != 0)
+ goto dput_and_out;
+ }
++
+ error = notify_change(nd.dentry, &newattrs);
+ dput_and_out:
+ path_release(&nd);
+@@ -304,12 +332,14 @@ asmlinkage long sys_utimes(char * filena
+ struct inode * inode;
+ struct iattr newattrs;
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, NULL);
+
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+
++ /* this is safe without a Lustre lock because it only depends
++ on the super block */
+ error = -EROFS;
+ if (IS_RDONLY(inode))
+ goto dput_and_out;
+@@ -324,7 +354,20 @@ asmlinkage long sys_utimes(char * filena
+ newattrs.ia_atime = times[0].tv_sec;
+ newattrs.ia_mtime = times[1].tv_sec;
+ newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
+- } else {
++ }
++
++ if (inode->i_op->setattr_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto dput_and_out;
++ }
++
++ error = -EPERM;
++ if (!utimes) {
+ if (current->fsuid != inode->i_uid &&
+ (error = permission(inode,MAY_WRITE)) != 0)
+ goto dput_and_out;
+@@ -347,6 +390,7 @@ asmlinkage long sys_access(const char *
+ int old_fsuid, old_fsgid;
+ kernel_cap_t old_cap;
+ int res;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+ if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */
+ return -EINVAL;
+@@ -364,13 +408,14 @@ asmlinkage long sys_access(const char *
+ else
+ current->cap_effective = current->cap_permitted;
+
+- res = user_path_walk(filename, &nd);
++ res = user_path_walk_it(filename, &nd, &it);
+ if (!res) {
+ res = permission(nd.dentry->d_inode, mode);
+ /* SuS v2 requires we report a read only fs too */
+ if(!res && (mode & S_IWOTH) && IS_RDONLY(nd.dentry->d_inode)
+ && !special_file(nd.dentry->d_inode->i_mode))
+ res = -EROFS;
++ intent_release(&it);
+ path_release(&nd);
+ }
+
+@@ -385,8 +430,9 @@ asmlinkage long sys_chdir(const char * f
+ {
+ int error;
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = __user_walk(filename,LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY,&nd);
++ error = __user_walk_it(filename,LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY,&nd, &it);
+ if (error)
+ goto out;
+
+@@ -397,6 +443,7 @@ asmlinkage long sys_chdir(const char * f
+ set_fs_pwd(current->fs, nd.mnt, nd.dentry);
+
+ dput_and_out:
++ intent_release(&it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -436,9 +483,10 @@ asmlinkage long sys_chroot(const char *
+ {
+ int error;
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = __user_walk(filename, LOOKUP_POSITIVE | LOOKUP_FOLLOW |
+- LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd);
++ error = __user_walk_it(filename, LOOKUP_POSITIVE | LOOKUP_FOLLOW |
++ LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd, &it);
+ if (error)
+ goto out;
+
+@@ -454,6 +502,7 @@ asmlinkage long sys_chroot(const char *
+ set_fs_altroot();
+ error = 0;
+ dput_and_out:
++ intent_release(&it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -508,6 +557,18 @@ asmlinkage long sys_chmod(const char * f
+ if (IS_RDONLY(inode))
+ goto dput_and_out;
+
++ if (inode->i_op->setattr_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++
++ newattrs.ia_mode = mode;
++ newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto dput_and_out;
++ }
++
+ error = -EPERM;
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ goto dput_and_out;
+@@ -538,6 +599,20 @@ static int chown_common(struct dentry *
+ error = -EROFS;
+ if (IS_RDONLY(inode))
+ goto out;
++
++ if (inode->i_op->setattr_raw) {
++ struct inode_operations *op = dentry->d_inode->i_op;
++
++ newattrs.ia_uid = user;
++ newattrs.ia_gid = group;
++ newattrs.ia_valid = ATTR_UID | ATTR_GID | ATTR_CTIME;
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ return error;
++ }
++
+ error = -EPERM;
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ goto out;
+@@ -638,10 +713,12 @@ asmlinkage long sys_fchown(unsigned int
+ * for the internal routines (ie open_namei()/follow_link() etc). 00 is
+ * used by symlinks.
+ */
++
+ struct file *filp_open(const char * filename, int flags, int mode)
+ {
+ int namei_flags, error;
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_OPEN, .it_flags = flags };
+
+ namei_flags = flags;
+ if ((namei_flags+1) & O_ACCMODE)
+@@ -649,14 +726,15 @@ struct file *filp_open(const char * file
+ if (namei_flags & O_TRUNC)
+ namei_flags |= 2;
+
+- error = open_namei(filename, namei_flags, mode, &nd);
+- if (!error)
+- return dentry_open(nd.dentry, nd.mnt, flags);
++ error = open_namei_it(filename, namei_flags, mode, &nd, &it);
++ if (error)
++ return ERR_PTR(error);
+
+- return ERR_PTR(error);
++ return dentry_open_it(nd.dentry, nd.mnt, flags, &it);
+ }
+
+-struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
++struct file *dentry_open_it(struct dentry *dentry, struct vfsmount *mnt,
++ int flags, struct lookup_intent *it)
+ {
+ struct file * f;
+ struct inode *inode;
+@@ -693,12 +771,15 @@ struct file *dentry_open(struct dentry *
+ }
+
+ if (f->f_op && f->f_op->open) {
++ f->f_it = it;
+ error = f->f_op->open(inode,f);
++ f->f_it = NULL;
+ if (error)
+ goto cleanup_all;
+ }
+ f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC);
+
++ intent_release(it);
+ return f;
+
+ cleanup_all:
+@@ -713,11 +794,17 @@ cleanup_all:
+ cleanup_file:
+ put_filp(f);
+ cleanup_dentry:
++ intent_release(it);
+ dput(dentry);
+ mntput(mnt);
+ return ERR_PTR(error);
+ }
+
++struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
++{
++ return dentry_open_it(dentry, mnt, flags, NULL);
++}
++
+ /*
+ * Find an empty file descriptor entry, and mark it busy.
+ */
+--- linux/fs/stat.c~vfs_intent-2.4.20-hp Thu Sep 13 16:04:43 2001
++++ linux-mmonroe/fs/stat.c Sat Jul 12 14:05:24 2003
+@@ -17,10 +17,12 @@
+ * Revalidate the inode. This is required for proper NFS attribute caching.
+ */
+ static __inline__ int
+-do_revalidate(struct dentry *dentry)
++do_revalidate(struct dentry *dentry, struct lookup_intent *it)
+ {
+ struct inode * inode = dentry->d_inode;
+- if (inode->i_op && inode->i_op->revalidate)
++ if (inode->i_op && inode->i_op->revalidate_it)
++ return inode->i_op->revalidate_it(dentry, it);
++ else if (inode->i_op && inode->i_op->revalidate)
+ return inode->i_op->revalidate(dentry);
+ return 0;
+ }
+@@ -135,13 +137,15 @@ static int cp_new_stat(struct inode * in
+ asmlinkage long sys_stat(char * filename, struct __old_kernel_stat * statbuf)
+ {
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+ int error;
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, &it);
+ if (!error) {
+- error = do_revalidate(nd.dentry);
++ error = do_revalidate(nd.dentry, &it);
+ if (!error)
+ error = cp_old_stat(nd.dentry->d_inode, statbuf);
++ intent_release(&it);
+ path_release(&nd);
+ }
+ return error;
+@@ -151,13 +155,15 @@ asmlinkage long sys_stat(char * filename
+ asmlinkage long sys_newstat(char * filename, struct stat * statbuf)
+ {
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+ int error;
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, &it);
+ if (!error) {
+- error = do_revalidate(nd.dentry);
++ error = do_revalidate(nd.dentry, &it);
+ if (!error)
+ error = cp_new_stat(nd.dentry->d_inode, statbuf);
++ intent_release(&it);
+ path_release(&nd);
+ }
+ return error;
+@@ -172,13 +178,15 @@ asmlinkage long sys_newstat(char * filen
+ asmlinkage long sys_lstat(char * filename, struct __old_kernel_stat * statbuf)
+ {
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+ int error;
+
+- error = user_path_walk_link(filename, &nd);
++ error = user_path_walk_link_it(filename, &nd, &it);
+ if (!error) {
+- error = do_revalidate(nd.dentry);
++ error = do_revalidate(nd.dentry, &it);
+ if (!error)
+ error = cp_old_stat(nd.dentry->d_inode, statbuf);
++ intent_release(&it);
+ path_release(&nd);
+ }
+ return error;
+@@ -189,13 +197,15 @@ asmlinkage long sys_lstat(char * filenam
+ asmlinkage long sys_newlstat(char * filename, struct stat * statbuf)
+ {
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+ int error;
+
+- error = user_path_walk_link(filename, &nd);
++ error = user_path_walk_link_it(filename, &nd, &it);
+ if (!error) {
+- error = do_revalidate(nd.dentry);
++ error = do_revalidate(nd.dentry, &it);
+ if (!error)
+ error = cp_new_stat(nd.dentry->d_inode, statbuf);
++ intent_release(&it);
+ path_release(&nd);
+ }
+ return error;
+@@ -216,7 +226,7 @@ asmlinkage long sys_fstat(unsigned int f
+ if (f) {
+ struct dentry * dentry = f->f_dentry;
+
+- err = do_revalidate(dentry);
++ err = do_revalidate(dentry, NULL);
+ if (!err)
+ err = cp_old_stat(dentry->d_inode, statbuf);
+ fput(f);
+@@ -235,7 +245,7 @@ asmlinkage long sys_newfstat(unsigned in
+ if (f) {
+ struct dentry * dentry = f->f_dentry;
+
+- err = do_revalidate(dentry);
++ err = do_revalidate(dentry, NULL);
+ if (!err)
+ err = cp_new_stat(dentry->d_inode, statbuf);
+ fput(f);
+@@ -257,7 +267,7 @@ asmlinkage long sys_readlink(const char
+
+ error = -EINVAL;
+ if (inode->i_op && inode->i_op->readlink &&
+- !(error = do_revalidate(nd.dentry))) {
++ !(error = do_revalidate(nd.dentry, NULL))) {
+ UPDATE_ATIME(inode);
+ error = inode->i_op->readlink(nd.dentry, buf, bufsiz);
+ }
+@@ -333,12 +343,14 @@ asmlinkage long sys_stat64(char * filena
+ {
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, &it);
+ if (!error) {
+- error = do_revalidate(nd.dentry);
++ error = do_revalidate(nd.dentry, &it);
+ if (!error)
+ error = cp_new_stat64(nd.dentry->d_inode, statbuf);
++ intent_release(&it);
+ path_release(&nd);
+ }
+ return error;
+@@ -348,12 +360,14 @@ asmlinkage long sys_lstat64(char * filen
+ {
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = user_path_walk_link(filename, &nd);
++ error = user_path_walk_link_it(filename, &nd, &it);
+ if (!error) {
+- error = do_revalidate(nd.dentry);
++ error = do_revalidate(nd.dentry, &it);
+ if (!error)
+ error = cp_new_stat64(nd.dentry->d_inode, statbuf);
++ intent_release(&it);
+ path_release(&nd);
+ }
+ return error;
+@@ -368,7 +382,7 @@ asmlinkage long sys_fstat64(unsigned lon
+ if (f) {
+ struct dentry * dentry = f->f_dentry;
+
+- err = do_revalidate(dentry);
++ err = do_revalidate(dentry, NULL);
+ if (!err)
+ err = cp_new_stat64(dentry->d_inode, statbuf);
+ fput(f);
+--- linux/fs/proc/base.c~vfs_intent-2.4.20-hp Sat Jul 12 14:04:46 2003
++++ linux-mmonroe/fs/proc/base.c Sat Jul 12 14:05:24 2003
+@@ -481,6 +481,9 @@ static int proc_pid_follow_link(struct d
+
+ error = inode->u.proc_i.op.proc_get_link(inode, &nd->dentry, &nd->mnt);
+ nd->last_type = LAST_BIND;
++
++ if (nd->it != NULL)
++ nd->it->it_int_flags |= IT_FL_FOLLOWED;
+ out:
+ return error;
+ }
+--- linux/include/linux/dcache.h~vfs_intent-2.4.20-hp Thu Nov 28 15:53:15 2002
++++ linux-mmonroe/include/linux/dcache.h Sat Jul 12 14:06:04 2003
+@@ -5,8 +5,47 @@
+
+ #include <asm/atomic.h>
+ #include <linux/mount.h>
++#include <linux/string.h>
+ #include <linux/kernel.h>
+
++#define IT_OPEN 0x0001
++#define IT_CREAT 0x0002
++#define IT_READDIR 0x0004
++#define IT_GETATTR 0x0008
++#define IT_LOOKUP 0x0010
++#define IT_UNLINK 0x0020
++#define IT_GETXATTR 0x0040
++#define IT_EXEC 0x0080
++#define IT_PIN 0x0100
++
++#define IT_FL_LOCKED 0x0001
++#define IT_FL_FOLLOWED 0x0002 /* set by vfs_follow_link */
++
++#define INTENT_MAGIC 0x19620323
++
++struct lookup_intent {
++ int it_op;
++ void (*it_op_release)(struct lookup_intent *);
++ int it_magic;
++ int it_mode;
++ int it_flags;
++ int it_disposition;
++ int it_status;
++ int it_int_flags;
++ __u64 it_lock_handle[2];
++ int it_lock_mode;
++ void *it_data;
++};
++
++static inline void intent_init(struct lookup_intent *it, int op, int flags)
++{
++ memset(it, 0, sizeof(*it));
++ it->it_magic = INTENT_MAGIC;
++ it->it_op = op;
++ it->it_flags = flags;
++}
++
++
+ /*
+ * linux/include/linux/dcache.h
+ *
+@@ -91,8 +130,22 @@ struct dentry_operations {
+ int (*d_delete)(struct dentry *);
+ void (*d_release)(struct dentry *);
+ void (*d_iput)(struct dentry *, struct inode *);
++ int (*d_revalidate_it)(struct dentry *, int, struct lookup_intent *);
++ void (*d_pin)(struct dentry *, struct vfsmount * , int);
++ void (*d_unpin)(struct dentry *, struct vfsmount *, int);
+ };
+
++#define PIN(de,mnt,flag) if (de->d_op && de->d_op->d_pin) \
++ de->d_op->d_pin(de, mnt, flag);
++#define UNPIN(de,mnt,flag) if (de->d_op && de->d_op->d_unpin) \
++ de->d_op->d_unpin(de, mnt, flag);
++
++
++/* defined in fs/namei.c */
++extern void intent_release(struct lookup_intent *it);
++/* defined in fs/dcache.c */
++extern void __d_rehash(struct dentry * entry, int lock);
++
+ /* the dentry parameter passed to d_hash and d_compare is the parent
+ * directory of the entries to be compared. It is used in case these
+ * functions need any directory specific information for determining
+@@ -124,6 +177,7 @@ d_iput: no no yes
+ * s_nfsd_free_path semaphore will be down
+ */
+ #define DCACHE_REFERENCED 0x0008 /* Recently used, don't discard. */
++#define DCACHE_LUSTRE_INVALID 0x0010 /* Lustre invalidated */
+
+ extern spinlock_t dcache_lock;
+
+--- linux/include/linux/fs.h~vfs_intent-2.4.20-hp Sat Jul 12 14:05:20 2003
++++ linux-mmonroe/include/linux/fs.h Sat Jul 12 14:05:24 2003
+@@ -340,6 +340,9 @@ extern void set_bh_page(struct buffer_he
+ #define ATTR_MTIME_SET 256
+ #define ATTR_FORCE 512 /* Not a change, but a change it */
+ #define ATTR_ATTR_FLAG 1024
++#define ATTR_RAW 0x0800 /* file system, not vfs will massage attrs */
++#define ATTR_FROM_OPEN 0x1000 /* called from open path, ie O_TRUNC */
++#define ATTR_CTIME_SET 0x2000
+
+ /*
+ * This is the Inode Attributes structure, used for notify_change(). It
+@@ -576,6 +579,7 @@ struct file {
+
+ /* needed for tty driver, and maybe others */
+ void *private_data;
++ struct lookup_intent *f_it;
+
+ /* preallocated helper kiobuf to speedup O_DIRECT */
+ struct kiobuf *f_iobuf;
+@@ -697,6 +701,7 @@ struct nameidata {
+ struct qstr last;
+ unsigned int flags;
+ int last_type;
++ struct lookup_intent *it;
+ };
+
+ /*
+@@ -817,7 +822,8 @@ extern int vfs_symlink(struct inode *, s
+ extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
+ extern int vfs_rmdir(struct inode *, struct dentry *);
+ extern int vfs_unlink(struct inode *, struct dentry *);
+-extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
++int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
++ struct inode *new_dir, struct dentry *new_dentry);
+
+ /*
+ * File types
+@@ -877,21 +883,32 @@ struct file_operations {
+
+ struct inode_operations {
+ int (*create) (struct inode *,struct dentry *,int);
++ int (*create_it) (struct inode *,struct dentry *,int, struct lookup_intent *);
+ struct dentry * (*lookup) (struct inode *,struct dentry *);
++ struct dentry * (*lookup_it) (struct inode *,struct dentry *, struct lookup_intent *, int flags);
+ int (*link) (struct dentry *,struct inode *,struct dentry *);
++ int (*link_raw) (struct nameidata *,struct nameidata *);
+ int (*unlink) (struct inode *,struct dentry *);
++ int (*unlink_raw) (struct nameidata *);
+ int (*symlink) (struct inode *,struct dentry *,const char *);
++ int (*symlink_raw) (struct nameidata *,const char *);
+ int (*mkdir) (struct inode *,struct dentry *,int);
++ int (*mkdir_raw) (struct nameidata *,int);
+ int (*rmdir) (struct inode *,struct dentry *);
++ int (*rmdir_raw) (struct nameidata *);
+ int (*mknod) (struct inode *,struct dentry *,int,int);
++ int (*mknod_raw) (struct nameidata *,int,dev_t);
+ int (*rename) (struct inode *, struct dentry *,
+ struct inode *, struct dentry *);
++ int (*rename_raw) (struct nameidata *, struct nameidata *);
+ int (*readlink) (struct dentry *, char *,int);
+ int (*follow_link) (struct dentry *, struct nameidata *);
+ void (*truncate) (struct inode *);
+ int (*permission) (struct inode *, int);
+ int (*revalidate) (struct dentry *);
++ int (*revalidate_it) (struct dentry *, struct lookup_intent *);
+ int (*setattr) (struct dentry *, struct iattr *);
++ int (*setattr_raw) (struct inode *, struct iattr *);
+ int (*getattr) (struct dentry *, struct iattr *);
+ int (*setxattr) (struct dentry *, const char *, void *, size_t, int);
+ ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
+@@ -1088,10 +1105,14 @@ static inline int get_lease(struct inode
+
+ asmlinkage long sys_open(const char *, int, int);
+ asmlinkage long sys_close(unsigned int); /* yes, it's really unsigned */
+-extern int do_truncate(struct dentry *, loff_t start);
++extern int do_truncate(struct dentry *, loff_t start, int called_from_open);
+
+ extern struct file *filp_open(const char *, int, int);
+ extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);
++extern int open_namei_it(const char *filename, int namei_flags, int mode,
++ struct nameidata *nd, struct lookup_intent *it);
++extern struct file *dentry_open_it(struct dentry *dentry, struct vfsmount *mnt,
++ int flags, struct lookup_intent *it);
+ extern int filp_close(struct file *, fl_owner_t id);
+ extern char * getname(const char *);
+
+@@ -1353,6 +1374,7 @@ typedef int (*read_actor_t)(read_descrip
+ extern loff_t default_llseek(struct file *file, loff_t offset, int origin);
+
+ extern int FASTCALL(__user_walk(const char *, unsigned, struct nameidata *));
++extern int FASTCALL(__user_walk_it(const char *, unsigned, struct nameidata *, struct lookup_intent *it));
+ extern int FASTCALL(path_init(const char *, unsigned, struct nameidata *));
+ extern int FASTCALL(path_walk(const char *, struct nameidata *));
+ extern int FASTCALL(path_lookup(const char *, unsigned, struct nameidata *));
+@@ -1364,6 +1386,8 @@ extern struct dentry * lookup_one_len(co
+ extern struct dentry * lookup_hash(struct qstr *, struct dentry *);
+ #define user_path_walk(name,nd) __user_walk(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd)
+ #define user_path_walk_link(name,nd) __user_walk(name, LOOKUP_POSITIVE, nd)
++#define user_path_walk_it(name,nd,it) __user_walk_it(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd, it)
++#define user_path_walk_link_it(name,nd,it) __user_walk_it(name, LOOKUP_POSITIVE, nd, it)
+
+ extern void inode_init_once(struct inode *);
+ extern void iput(struct inode *);
+@@ -1499,6 +1523,8 @@ extern struct file_operations generic_ro
+
+ extern int vfs_readlink(struct dentry *, char *, int, const char *);
+ extern int vfs_follow_link(struct nameidata *, const char *);
++extern int vfs_follow_link_it(struct nameidata *, const char *,
++ struct lookup_intent *it);
+ extern int page_readlink(struct dentry *, char *, int);
+ extern int page_follow_link(struct dentry *, struct nameidata *);
+ extern struct inode_operations page_symlink_inode_operations;
+--- linux/include/linux/fs_struct.h~vfs_intent-2.4.20-hp Fri Jul 13 15:10:44 2001
++++ linux-mmonroe/include/linux/fs_struct.h Sat Jul 12 14:05:24 2003
+@@ -34,10 +34,12 @@ static inline void set_fs_root(struct fs
+ write_lock(&fs->lock);
+ old_root = fs->root;
+ old_rootmnt = fs->rootmnt;
++ PIN(dentry, mnt, 1);
+ fs->rootmnt = mntget(mnt);
+ fs->root = dget(dentry);
+ write_unlock(&fs->lock);
+ if (old_root) {
++ UNPIN(old_root, old_rootmnt, 1);
+ dput(old_root);
+ mntput(old_rootmnt);
+ }
+@@ -57,10 +59,12 @@ static inline void set_fs_pwd(struct fs_
+ write_lock(&fs->lock);
+ old_pwd = fs->pwd;
+ old_pwdmnt = fs->pwdmnt;
++ PIN(dentry, mnt, 0);
+ fs->pwdmnt = mntget(mnt);
+ fs->pwd = dget(dentry);
+ write_unlock(&fs->lock);
+ if (old_pwd) {
++ UNPIN(old_pwd, old_pwdmnt, 0);
+ dput(old_pwd);
+ mntput(old_pwdmnt);
+ }
+--- linux/kernel/ksyms.c~vfs_intent-2.4.20-hp Sat Jul 12 14:05:21 2003
++++ linux-mmonroe/kernel/ksyms.c Sat Jul 12 14:05:24 2003
+@@ -296,6 +296,7 @@ EXPORT_SYMBOL(read_cache_page);
+ EXPORT_SYMBOL(set_page_dirty);
+ EXPORT_SYMBOL(vfs_readlink);
+ EXPORT_SYMBOL(vfs_follow_link);
++EXPORT_SYMBOL(vfs_follow_link_it);
+ EXPORT_SYMBOL(page_readlink);
+ EXPORT_SYMBOL(page_follow_link);
+ EXPORT_SYMBOL(page_symlink_inode_operations);
+--- linux/kernel/fork.c~vfs_intent-2.4.20-hp Sat Jul 12 14:04:49 2003
++++ linux-mmonroe/kernel/fork.c Sat Jul 12 14:05:24 2003
+@@ -388,10 +388,13 @@ static inline struct fs_struct *__copy_f
+ fs->umask = old->umask;
+ read_lock(&old->lock);
+ fs->rootmnt = mntget(old->rootmnt);
++ PIN(old->pwd, old->pwdmnt, 0);
++ PIN(old->root, old->rootmnt, 1);
+ fs->root = dget(old->root);
+ fs->pwdmnt = mntget(old->pwdmnt);
+ fs->pwd = dget(old->pwd);
+ if (old->altroot) {
++ PIN(old->altroot, old->altrootmnt, 1);
+ fs->altrootmnt = mntget(old->altrootmnt);
+ fs->altroot = dget(old->altroot);
+ } else {
+--- linux/kernel/exit.c~vfs_intent-2.4.20-hp Sat Jul 12 14:04:49 2003
++++ linux-mmonroe/kernel/exit.c Sat Jul 12 14:05:24 2003
+@@ -239,11 +239,14 @@ static inline void __put_fs_struct(struc
+ {
+ /* No need to hold fs->lock if we are killing it */
+ if (atomic_dec_and_test(&fs->count)) {
++ UNPIN(fs->pwd, fs->pwdmnt, 0);
++ UNPIN(fs->root, fs->rootmnt, 1);
+ dput(fs->root);
+ mntput(fs->rootmnt);
+ dput(fs->pwd);
+ mntput(fs->pwdmnt);
+ if (fs->altroot) {
++ UNPIN(fs->altroot, fs->altrootmnt, 1);
+ dput(fs->altroot);
+ mntput(fs->altrootmnt);
+ }
+
+_
git://git.whamcloud.com / fs / lustre-release.git / blobdiff