+ fs/dcache.c | 3
+ fs/namei.c | 228 ++++++++++++++++++++++++++++++++++++++-----------
+ fs/nfsd/vfs.c | 2
+ fs/open.c | 53 +++++++++--
+ fs/stat.c | 9 +
+ include/linux/dcache.h | 31 ++++++
+ include/linux/fs.h | 13 ++
+ kernel/ksyms.c | 1
+ 8 files changed, 278 insertions(+), 62 deletions(-)
+
+--- linux-2.4.18-18.8.0-l4/fs/dcache.c~vfs_intent-2.4.18-18 Sat Dec 14 06:31:22 2002
++++ linux-2.4.18-18.8.0-l4-root/fs/dcache.c Sat Dec 14 06:31:22 2002
+@@ -150,6 +150,8 @@ repeat:
+ unhash_it:
+ list_del_init(&dentry->d_hash);
+
++
++
+ kill_it: {
+ struct dentry *parent;
+ list_del(&dentry->d_child);
+@@ -645,6 +647,7 @@ struct dentry * d_alloc(struct dentry *
+ dentry->d_fsdata = NULL;
+ dentry->d_extra_attributes = NULL;
+ dentry->d_mounted = 0;
++ dentry->d_it = NULL;
+ INIT_LIST_HEAD(&dentry->d_hash);
+ INIT_LIST_HEAD(&dentry->d_lru);
+ INIT_LIST_HEAD(&dentry->d_subdirs);
+--- linux-2.4.18-18.8.0-l4/fs/namei.c~vfs_intent-2.4.18-18 Sat Dec 14 06:31:22 2002
++++ linux-2.4.18-18.8.0-l4-root/fs/namei.c Sat Dec 14 06:37:21 2002
+@@ -1,3 +1,6 @@
++
++
++
+ /*
+ * linux/fs/namei.c
+ *
+@@ -94,6 +97,14 @@
+ * XEmacs seems to be relying on it...
+ */
+
++void intent_release(struct dentry *de, struct lookup_intent *it)
++{
++ if (it && de->d_op && de->d_op->d_intent_release)
++ de->d_op->d_intent_release(de, 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 +271,19 @@ 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_revalidate2) {
++ if (!dentry->d_op->d_revalidate2(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);
+@@ -281,7 +301,8 @@ 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;
+@@ -300,6 +321,9 @@ static struct dentry * real_lookup(struc
+ result = ERR_PTR(-ENOMEM);
+ if (dentry) {
+ lock_kernel();
++ if (dir->i_op->lookup2)
++ result = dir->i_op->lookup2(dir, dentry, it);
++ else
+ result = dir->i_op->lookup(dir, dentry);
+ unlock_kernel();
+ if (result)
+@@ -321,6 +345,12 @@ static struct dentry * real_lookup(struc
+ dput(result);
+ result = ERR_PTR(-ENOENT);
+ }
++ } else if (result->d_op && result->d_op->d_revalidate2) {
++ if (!result->d_op->d_revalidate2(result, flags, it) &&
++ !d_invalidate(result)) {
++ dput(result);
++ result = ERR_PTR(-ENOENT);
++ }
+ }
+ return result;
+ }
+@@ -334,7 +364,8 @@ int max_recursive_link = 5;
+ * 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 >= max_recursive_link)
+@@ -348,10 +379,14 @@ static inline int do_follow_link(struct
+ current->link_count++;
+ current->total_link_count++;
+ UPDATE_ATIME(dentry->d_inode);
+- err = dentry->d_inode->i_op->follow_link(dentry, nd);
++ if (dentry->d_inode->i_op->follow_link2)
++ err = dentry->d_inode->i_op->follow_link2(dentry, nd, it);
++ else
++ err = dentry->d_inode->i_op->follow_link(dentry, nd);
+ current->link_count--;
+ return err;
+ loop:
++ intent_release(dentry, it);
+ path_release(nd);
+ return -ELOOP;
+ }
+@@ -449,7 +484,8 @@ 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;
+@@ -526,12 +562,12 @@ 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) {
+ err = -EWOULDBLOCKIO;
+ if (atomic)
+ break;
+- 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;
+@@ -548,8 +584,8 @@ int link_path_walk(const char * name, st
+ if (!inode->i_op)
+ goto out_dput;
+
+- if (inode->i_op->follow_link) {
+- err = do_follow_link(dentry, nd);
++ if (inode->i_op->follow_link || inode->i_op->follow_link2) {
++ err = do_follow_link(dentry, nd, it);
+ dput(dentry);
+ if (err)
+ goto return_err;
+@@ -565,7 +601,7 @@ 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->lookup2)
+ break;
+ continue;
+ /* here ends the main loop */
+@@ -592,12 +628,12 @@ last_component:
+ if (err < 0)
+ break;
+ }
+- dentry = cached_lookup(nd->dentry, &this, 0);
++ dentry = cached_lookup(nd->dentry, &this, 0, it);
+ if (!dentry) {
+ err = -EWOULDBLOCKIO;
+ if (atomic)
+ break;
+- dentry = real_lookup(nd->dentry, &this, 0);
++ dentry = real_lookup(nd->dentry, &this, 0, it);
+ err = PTR_ERR(dentry);
+ if (IS_ERR(dentry))
+ break;
+@@ -606,8 +642,10 @@ last_component:
+ ;
+ inode = dentry->d_inode;
+ if ((lookup_flags & LOOKUP_FOLLOW)
+- && inode && inode->i_op && inode->i_op->follow_link) {
+- err = do_follow_link(dentry, nd);
++ && inode && inode->i_op &&
++ (inode->i_op->follow_link ||
++ inode->i_op->follow_link2)) {
++ err = do_follow_link(dentry, nd, it);
+ dput(dentry);
+ if (err)
+ goto return_err;
+@@ -621,7 +659,8 @@ 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->lookup2))
+ break;
+ }
+ goto return_base;
+@@ -663,10 +702,21 @@ 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 */
+@@ -751,6 +801,17 @@ 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;
+@@ -779,7 +840,8 @@ 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;
+@@ -802,13 +864,16 @@ 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->lookup2)
++ dentry = inode->i_op->lookup2(inode, new, it);
++ else
+ dentry = inode->i_op->lookup(inode, new);
+ unlock_kernel();
+ if (!dentry)
+@@ -820,6 +885,12 @@ 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)
+ {
+@@ -841,7 +912,7 @@ 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);
+ }
+@@ -872,6 +943,23 @@ 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.
+@@ -1045,14 +1133,17 @@ int may_open(struct nameidata *nd, int a
+ return get_lease(inode, flag);
+ }
+
++extern struct file *dentry_open_it(struct dentry *dentry, struct vfsmount *mnt,
++ int flags, struct lookup_intent *it);
++
+ struct file *filp_open(const char * pathname, int open_flags, int mode)
+ {
+ int acc_mode, error = 0;
+- struct inode *inode;
+ struct dentry *dentry;
+ struct dentry *dir;
+ int flag = open_flags;
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_OPEN };
+ int count = 0;
+
+ if ((flag+1) & O_ACCMODE)
+@@ -1066,7 +1157,7 @@ struct file *filp_open(const char * path
+ * 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 ERR_PTR(error);
+ dentry = nd.dentry;
+@@ -1076,6 +1167,8 @@ struct file *filp_open(const char * path
+ /*
+ * Create - we need to know the parent.
+ */
++ it.it_mode = mode;
++ it.it_op |= IT_CREAT;
+ error = path_lookup(pathname, LOOKUP_PARENT, &nd);
+ if (error)
+ return ERR_PTR(error);
+@@ -1091,7 +1184,7 @@ struct file *filp_open(const char * path
+
+ 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);
+@@ -1100,6 +1193,7 @@ do_last:
+ goto exit;
+ }
+
++ it.it_mode = mode;
+ /* Negative dentry, just create the file */
+ if (!dentry->d_inode) {
+ error = vfs_create(dir->d_inode, dentry,
+@@ -1134,7 +1228,8 @@ do_last:
+ error = -ENOENT;
+ if (!dentry->d_inode)
+ goto exit_dput;
+- if (dentry->d_inode->i_op && dentry->d_inode->i_op->follow_link)
++ if (dentry->d_inode->i_op && (dentry->d_inode->i_op->follow_link ||
++ dentry->d_inode->i_op->follow_link2))
+ goto do_link;
+
+ dput(nd.dentry);
+@@ -1149,11 +1244,13 @@ ok:
+ if (!S_ISREG(nd.dentry->d_inode->i_mode))
+ open_flags &= ~O_TRUNC;
+
+- return dentry_open(nd.dentry, nd.mnt, open_flags);
++ return dentry_open_it(nd.dentry, nd.mnt, open_flags, &it);
+
+ exit_dput:
++ intent_release(dentry, &it);
+ dput(dentry);
+ exit:
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ return ERR_PTR(error);
+
+@@ -1172,7 +1269,12 @@ do_link:
+ * are done. Procfs-like symlinks just set LAST_BIND.
+ */
+ UPDATE_ATIME(dentry->d_inode);
+- error = dentry->d_inode->i_op->follow_link(dentry, &nd);
++ if (dentry->d_inode->i_op->follow_link2)
++ error = dentry->d_inode->i_op->follow_link2(dentry, &nd, &it);
++ else
++ error = dentry->d_inode->i_op->follow_link(dentry, &nd);
++ if (error)
++ intent_release(dentry, &it);
+ dput(dentry);
+ if (error)
+ return error;
+@@ -1194,13 +1296,15 @@ 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;
+ }
+
++
+ /* 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;
+
+@@ -1208,7 +1312,7 @@ 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)
+@@ -1254,6 +1358,7 @@ asmlinkage long sys_mknod(const char * f
+ char * tmp;
+ struct dentry * dentry;
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_MKNOD, .it_mode = mode };
+
+ if (S_ISDIR(mode))
+ return -EPERM;
+@@ -1264,7 +1369,7 @@ asmlinkage long sys_mknod(const char * f
+ error = path_lookup(tmp, LOOKUP_PARENT, &nd);
+ if (error)
+ goto out;
+- dentry = lookup_create(&nd, 0);
++ dentry = lookup_create(&nd, 0, &it);
+ error = PTR_ERR(dentry);
+
+ mode &= ~current->fs->umask;
+@@ -1282,6 +1387,7 @@ asmlinkage long sys_mknod(const char * f
+ default:
+ error = -EINVAL;
+ }
++ intent_release(dentry, &it);
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
+@@ -1322,6 +1428,7 @@ asmlinkage long sys_mkdir(const char * p
+ {
+ int error = 0;
+ char * tmp;
++ struct lookup_intent it = { .it_op = IT_MKDIR, .it_mode = mode };
+
+ tmp = getname(pathname);
+ error = PTR_ERR(tmp);
+@@ -1332,11 +1439,12 @@ asmlinkage long sys_mkdir(const char * p
+ error = path_lookup(tmp, LOOKUP_PARENT, &nd);
+ if (error)
+ goto out;
+- dentry = lookup_create(&nd, 1);
++ dentry = lookup_create(&nd, 1, &it);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ error = vfs_mkdir(nd.dentry->d_inode, dentry,
+ mode & ~current->fs->umask);
++ intent_release(dentry, &it);
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
+@@ -1420,6 +1528,7 @@ asmlinkage long sys_rmdir(const char * p
+ char * name;
+ struct dentry *dentry;
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_RMDIR };
+
+ name = getname(pathname);
+ if(IS_ERR(name))
+@@ -1441,10 +1550,11 @@ asmlinkage long sys_rmdir(const char * p
+ goto exit1;
+ }
+ down(&nd.dentry->d_inode->i_sem);
+- dentry = lookup_hash(&nd.last, nd.dentry);
++ dentry = lookup_hash_it(&nd.last, nd.dentry, &it);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ error = vfs_rmdir(nd.dentry->d_inode, dentry);
++ intent_release(dentry, &it);
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
+@@ -1488,6 +1598,7 @@ asmlinkage long sys_unlink(const char *
+ char * name;
+ struct dentry *dentry;
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_UNLINK };
+
+ name = getname(pathname);
+ if(IS_ERR(name))
+@@ -1500,7 +1611,7 @@ asmlinkage long sys_unlink(const char *
+ if (nd.last_type != LAST_NORM)
+ goto exit1;
+ down(&nd.dentry->d_inode->i_sem);
+- dentry = lookup_hash(&nd.last, nd.dentry);
++ dentry = lookup_hash_it(&nd.last, nd.dentry, &it);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ /* Why not before? Because we want correct error value */
+@@ -1508,6 +1619,7 @@ asmlinkage long sys_unlink(const char *
+ goto slashes;
+ error = vfs_unlink(nd.dentry->d_inode, dentry);
+ exit2:
++ intent_release(dentry, &it);
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
+@@ -1554,6 +1666,7 @@ asmlinkage long sys_symlink(const char *
+ int error = 0;
+ char * from;
+ char * to;
++ struct lookup_intent it = { .it_op = IT_SYMLINK };
+
+ from = getname(oldname);
+ if(IS_ERR(from))
+@@ -1567,10 +1680,12 @@ asmlinkage long sys_symlink(const char *
+ error = path_lookup(to, LOOKUP_PARENT, &nd);
+ if (error)
+ goto out;
+- dentry = lookup_create(&nd, 0);
++ it.it_data = from;
++ dentry = lookup_create(&nd, 0, &it);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ error = vfs_symlink(nd.dentry->d_inode, dentry, from);
++ intent_release(dentry, &it);
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
+@@ -1635,6 +1750,7 @@ asmlinkage long sys_link(const char * ol
+ {
+ int error;
+ char * to;
++ struct lookup_intent it = { .it_op = IT_LINK };
+
+ to = getname(newname);
+ error = PTR_ERR(to);
+@@ -1642,7 +1758,7 @@ asmlinkage long sys_link(const char * ol
+ struct dentry *new_dentry;
+ struct nameidata nd, old_nd;
+
+- error = __user_walk(oldname, LOOKUP_POSITIVE, &old_nd);
++ error = __user_walk_it(oldname, LOOKUP_POSITIVE, &old_nd, &it);
+ if (error)
+ goto exit;
+ error = path_lookup(to, LOOKUP_PARENT, &nd);
+@@ -1651,10 +1767,12 @@ asmlinkage long sys_link(const char * ol
+ error = -EXDEV;
+ if (old_nd.mnt != nd.mnt)
+ goto out_release;
+- new_dentry = lookup_create(&nd, 0);
++ it.it_op = IT_LINK2;
++ new_dentry = lookup_create(&nd, 0, &it);
+ error = PTR_ERR(new_dentry);
+ if (!IS_ERR(new_dentry)) {
+ error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
++ intent_release(new_dentry, &it);
+ dput(new_dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
+@@ -1695,7 +1813,8 @@ 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,
++ struct lookup_intent *it)
+ {
+ int error;
+ struct inode *target;
+@@ -1753,6 +1872,7 @@ int vfs_rename_dir(struct inode *old_dir
+ error = -EBUSY;
+ else
+ error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
++ intent_release(new_dentry, it);
+ if (target) {
+ if (!error)
+ target->i_flags |= S_DEAD;
+@@ -1774,7 +1894,8 @@ 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,
++ struct lookup_intent *it)
+ {
+ int error;
+
+@@ -1805,6 +1926,7 @@ int vfs_rename_other(struct inode *old_d
+ error = -EBUSY;
+ else
+ error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
++ intent_release(new_dentry, it);
+ double_up(&old_dir->i_zombie, &new_dir->i_zombie);
+ if (error)
+ return error;
+@@ -1816,13 +1938,14 @@ int vfs_rename_other(struct inode *old_d
+ }
+
+ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+- struct inode *new_dir, struct dentry *new_dentry)
++ struct inode *new_dir, struct dentry *new_dentry,
++ struct lookup_intent *it)
+ {
+ int error;
+ if (S_ISDIR(old_dentry->d_inode->i_mode))
+- error = vfs_rename_dir(old_dir,old_dentry,new_dir,new_dentry);
++ error = vfs_rename_dir(old_dir,old_dentry,new_dir,new_dentry,it);
+ else
+- error = vfs_rename_other(old_dir,old_dentry,new_dir,new_dentry);
++ error = vfs_rename_other(old_dir,old_dentry,new_dir,new_dentry,it);
+ if (!error) {
+ if (old_dir == new_dir)
+ inode_dir_notify(old_dir, DN_RENAME);
+@@ -1839,6 +1962,7 @@ static inline int do_rename(const char *
+ int error = 0;
+ struct dentry * old_dir, * new_dir;
+ struct dentry * old_dentry, *new_dentry;
++ struct lookup_intent it = { .it_op = IT_RENAME };
+ struct nameidata oldnd, newnd;
+
+ error = path_lookup(oldname, LOOKUP_PARENT, &oldnd);
+@@ -1864,7 +1988,7 @@ static inline int do_rename(const char *
+
+ double_lock(new_dir, old_dir);
+
+- old_dentry = lookup_hash(&oldnd.last, old_dir);
++ old_dentry = lookup_hash_it(&oldnd.last, old_dir, &it);
+ error = PTR_ERR(old_dentry);
+ if (IS_ERR(old_dentry))
+ goto exit3;
+@@ -1880,18 +2004,21 @@ static inline int do_rename(const char *
+ if (newnd.last.name[newnd.last.len])
+ goto exit4;
+ }
+- new_dentry = lookup_hash(&newnd.last, new_dir);
++ it.it_op = IT_RENAME2;
++ new_dentry = lookup_hash_it(&newnd.last, new_dir, &it);
+ 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);
++ new_dir->d_inode, new_dentry, &it);
+ unlock_kernel();
+
++ intent_release(new_dentry, &it);
+ dput(new_dentry);
+ exit4:
++ intent_release(old_dentry, &it);
+ dput(old_dentry);
+ exit3:
+ double_up(&new_dir->d_inode->i_sem, &old_dir->d_inode->i_sem);
+@@ -1940,7 +2067,8 @@ 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;
+@@ -1953,7 +2081,7 @@ __vfs_follow_link(struct nameidata *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;
+@@ -1975,7 +2103,13 @@ 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 */
+@@ -2017,7 +2151,7 @@ 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-2.4.18-18.8.0-l4/fs/nfsd/vfs.c~vfs_intent-2.4.18-18 Sat Dec 14 06:31:22 2002
++++ linux-2.4.18-18.8.0-l4-root/fs/nfsd/vfs.c Sat Dec 14 06:31:22 2002
+@@ -1298,7 +1298,7 @@ nfsd_rename(struct svc_rqst *rqstp, stru
+ err = nfserr_perm;
+ } else
+ #endif
+- err = vfs_rename(fdir, odentry, tdir, ndentry);
++ err = vfs_rename(fdir, odentry, tdir, ndentry, NULL);
+ unlock_kernel();
+ if (!err && EX_ISSYNC(tfhp->fh_export)) {
+ nfsd_sync_dir(tdentry);
+--- linux-2.4.18-18.8.0-l4/fs/open.c~vfs_intent-2.4.18-18 Sat Dec 14 06:31:22 2002
++++ linux-2.4.18-18.8.0-l4-root/fs/open.c Sat Dec 14 06:31:22 2002
+@@ -19,6 +19,9 @@
+ #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);
++extern void intent_release(struct dentry *de, struct lookup_intent *it);
+
+ int vfs_statfs(struct super_block *sb, struct statfs *buf)
+ {
+@@ -118,12 +121,13 @@ static inline long do_sys_truncate(const
+ struct nameidata nd;
+ struct inode * inode;
+ int error;
++ struct lookup_intent it = { .it_op = IT_SETATTR };
+
+ 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;
+@@ -168,6 +172,7 @@ static inline long do_sys_truncate(const
+ put_write_access(inode);
+
+ dput_and_out:
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -259,8 +264,9 @@ asmlinkage long sys_utime(char * filenam
+ struct nameidata nd;
+ struct inode * inode;
+ struct iattr newattrs;
++ struct lookup_intent it = { .it_op = IT_SETATTR };
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, &it);
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+@@ -286,6 +292,7 @@ asmlinkage long sys_utime(char * filenam
+ }
+ error = notify_change(nd.dentry, &newattrs);
+ dput_and_out:
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -303,8 +310,9 @@ asmlinkage long sys_utimes(char * filena
+ struct nameidata nd;
+ struct inode * inode;
+ struct iattr newattrs;
++ struct lookup_intent it = { .it_op = IT_SETATTR };
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, &it);
+
+ if (error)
+ goto out;
+@@ -331,6 +339,7 @@ asmlinkage long sys_utimes(char * filena
+ }
+ error = notify_change(nd.dentry, &newattrs);
+ dput_and_out:
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -347,6 +356,7 @@ 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 +374,14 @@ 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(nd.dentry, &it);
+ path_release(&nd);
+ }
+
+@@ -385,8 +396,11 @@ 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 +411,7 @@ asmlinkage long sys_chdir(const char * f
+ set_fs_pwd(current->fs, nd.mnt, nd.dentry);
+
+ dput_and_out:
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -436,9 +451,10 @@ 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 +470,7 @@ asmlinkage long sys_chroot(const char *
+ set_fs_altroot();
+ error = 0;
+ dput_and_out:
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -498,8 +515,9 @@ asmlinkage long sys_chmod(const char * f
+ struct inode * inode;
+ int error;
+ struct iattr newattrs;
++ struct lookup_intent it = { .it_op = IT_SETATTR };
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, &it);
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+@@ -519,6 +537,7 @@ asmlinkage long sys_chmod(const char * f
+ error = notify_change(nd.dentry, &newattrs);
+
+ dput_and_out:
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -588,10 +607,12 @@ asmlinkage long sys_chown(const char * f
+ {
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_SETATTR };
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, &it);
+ if (!error) {
+ error = chown_common(nd.dentry, user, group);
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ }
+ return error;
+@@ -601,10 +622,12 @@ asmlinkage long sys_lchown(const char *
+ {
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_SETATTR };
+
+- error = user_path_walk_link(filename, &nd);
++ error = user_path_walk_link_it(filename, &nd, &it);
+ if (!error) {
+ error = chown_common(nd.dentry, user, group);
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ }
+ return error;
+@@ -628,7 +651,8 @@ extern ssize_t do_readahead(struct file
+ /* for files over a certains size it doesn't pay to do readahead on open */
+ #define READAHEAD_CUTOFF 48000
+
+-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;
+@@ -693,6 +717,7 @@ struct file *dentry_open(struct dentry *
+ do_readahead(f, 0, (48 * 1024) >> PAGE_SHIFT);
+
+
++ intent_release(dentry, it);
+ return f;
+
+ cleanup_all:
+@@ -707,11 +732,17 @@ cleanup_all:
+ cleanup_file:
+ put_filp(f);
+ cleanup_dentry:
++ intent_release(dentry, 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-2.4.18-18.8.0-l4/fs/stat.c~vfs_intent-2.4.18-18 Sat Dec 14 06:31:22 2002
++++ linux-2.4.18-18.8.0-l4-root/fs/stat.c Sat Dec 14 06:31:22 2002
+@@ -13,6 +13,7 @@
+
+ #include <asm/uaccess.h>
+
++extern void intent_release(struct dentry *de, struct lookup_intent *it);
+ /*
+ * Revalidate the inode. This is required for proper NFS attribute caching.
+ */
+@@ -104,10 +105,12 @@ int vfs_stat(char *name, struct kstat *s
+ {
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = user_path_walk(name, &nd);
++ error = user_path_walk_it(name, &nd, &it);
+ if (!error) {
+ error = do_getattr(nd.mnt, nd.dentry, stat);
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ }
+ return error;
+@@ -117,10 +120,12 @@ int vfs_lstat(char *name, struct kstat *
+ {
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = user_path_walk_link(name, &nd);
++ error = user_path_walk_link_it(name, &nd, &it);
+ if (!error) {
+ error = do_getattr(nd.mnt, nd.dentry, stat);
++ intent_release(nd.dentry, &it);
+ path_release(&nd);
+ }
+ return error;
+--- linux-2.4.18-18.8.0-l4/include/linux/dcache.h~vfs_intent-2.4.18-18 Sat Dec 14 06:31:22 2002
++++ linux-2.4.18-18.8.0-l4-root/include/linux/dcache.h Sat Dec 14 06:31:22 2002
+@@ -6,6 +6,34 @@
+ #include <asm/atomic.h>
+ #include <linux/mount.h>
+
++#define IT_OPEN (1)
++#define IT_CREAT (1<<1)
++#define IT_MKDIR (1<<2)
++#define IT_LINK (1<<3)
++#define IT_LINK2 (1<<4)
++#define IT_SYMLINK (1<<5)
++#define IT_UNLINK (1<<6)
++#define IT_RMDIR (1<<7)
++#define IT_RENAME (1<<8)
++#define IT_RENAME2 (1<<9)
++#define IT_READDIR (1<<10)
++#define IT_GETATTR (1<<11)
++#define IT_SETATTR (1<<12)
++#define IT_READLINK (1<<13)
++#define IT_MKNOD (1<<14)
++#define IT_LOOKUP (1<<15)
++
++struct lookup_intent {
++ int it_op;
++ int it_mode;
++ int it_disposition;
++ int it_status;
++ struct iattr *it_iattr;
++ __u64 it_lock_handle[2];
++ int it_lock_mode;
++ void *it_data;
++};
++
+ /*
+ * linux/include/linux/dcache.h
+ *
+@@ -78,6 +106,7 @@ struct dentry {
+ unsigned long d_time; /* used by d_revalidate */
+ struct dentry_operations *d_op;
+ struct super_block * d_sb; /* The root of the dentry tree */
++ struct lookup_intent *d_it;
+ unsigned long d_vfs_flags;
+ void * d_fsdata; /* fs-specific data */
+ void * d_extra_attributes; /* TUX-specific data */
+@@ -91,6 +120,8 @@ struct dentry_operations {
+ int (*d_delete)(struct dentry *);
+ void (*d_release)(struct dentry *);
+ void (*d_iput)(struct dentry *, struct inode *);
++ int (*d_revalidate2)(struct dentry *, int, struct lookup_intent *);
++ void (*d_intent_release)(struct dentry *, struct lookup_intent *);
+ };
+
+ /* the dentry parameter passed to d_hash and d_compare is the parent
+--- linux-2.4.18-18.8.0-l4/include/linux/fs.h~vfs_intent-2.4.18-18 Sat Dec 14 06:31:22 2002
++++ linux-2.4.18-18.8.0-l4-root/include/linux/fs.h Sat Dec 14 06:33:11 2002
+@@ -576,6 +576,7 @@ struct file {
+
+ /* needed for tty driver, and maybe others */
+ void *private_data;
++ struct lookup_intent *f_intent;
+
+ /* preallocated helper kiobuf to speedup O_DIRECT */
+ struct kiobuf *f_iobuf;
+@@ -836,7 +837,9 @@ 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,
++ struct lookup_intent *it);
+
+ /*
+ * File types
+@@ -897,6 +900,7 @@ struct file_operations {
+ struct inode_operations {
+ int (*create) (struct inode *,struct dentry *,int);
+ struct dentry * (*lookup) (struct inode *,struct dentry *);
++ struct dentry * (*lookup2) (struct inode *,struct dentry *, struct lookup_intent *);
+ int (*link) (struct dentry *,struct inode *,struct dentry *);
+ int (*unlink) (struct inode *,struct dentry *);
+ int (*symlink) (struct inode *,struct dentry *,const char *);
+@@ -907,6 +911,8 @@ struct inode_operations {
+ struct inode *, struct dentry *);
+ int (*readlink) (struct dentry *, char *,int);
+ int (*follow_link) (struct dentry *, struct nameidata *);
++ int (*follow_link2) (struct dentry *, struct nameidata *,
++ struct lookup_intent *it);
+ void (*truncate) (struct inode *);
+ int (*permission) (struct inode *, int);
+ int (*revalidate) (struct dentry *);
+@@ -1381,6 +1387,7 @@ 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 *));
+@@ -1392,6 +1399,8 @@ 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 *);
+@@ -1492,6 +1501,8 @@ 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-2.4.18-18.8.0-l4/kernel/ksyms.c~vfs_intent-2.4.18-18 Sat Dec 14 06:31:22 2002
++++ linux-2.4.18-18.8.0-l4-root/kernel/ksyms.c Sat Dec 14 06:31:22 2002
+@@ -293,6 +293,7 @@ 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);
+
+_
git://git.whamcloud.com / fs / lustre-release.git / commitdiff