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Embed a struct path into struct nameidata instead of nd->{dentry,mnt}

Browse source 
This is the central patch of a cleanup series. In most cases there is no good
reason why someone would want to use a dentry for itself. This series reflects
that fact and embeds a struct path into nameidata.

Together with the other patches of this series
- it enforced the correct order of getting/releasing the reference count on
  <dentry,vfsmount> pairs
- it prepares the VFS for stacking support since it is essential to have a
  struct path in every place where the stack can be traversed
- it reduces the overall code size:

without patch series:
   text    data     bss     dec     hex filename
5321639  858418  715768 6895825  6938d1 vmlinux

with patch series:
   text    data     bss     dec     hex filename
5320026  858418  715768 6894212  693284 vmlinux

This patch:

Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix cifs]
[akpm@linux-foundation.org: fix smack]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Blunck 2008-02-14 19:34:32 -08:00 committed by Linus Torvalds
parent c5e725f33b
commit 4ac9137858
47 changed files with 431 additions and 402 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
arch/alpha/kernel/osf_sys.c
View file

@ -259,7 +259,7 @@ osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bu
retval = user_path_walk(path, &nd);
if (!retval) {
retval = do_osf_statfs(nd.dentry, buffer, bufsiz);
retval = do_osf_statfs(nd.path.dentry, buffer, bufsiz);
path_release(&nd);
}
return retval;

6
arch/mips/kernel/sysirix.c
View file

@ -694,7 +694,7 @@ asmlinkage int irix_statfs(const char __user *path,
if (error)
goto out;
error = vfs_statfs(nd.dentry, &kbuf);
error = vfs_statfs(nd.path.dentry, &kbuf);
if (error)
goto dput_and_out;
@ -1360,7 +1360,7 @@ asmlinkage int irix_statvfs(char __user *fname, struct irix_statvfs __user *buf)
error = user_path_walk(fname, &nd);
if (error)
goto out;
error = vfs_statfs(nd.dentry, &kbuf);
error = vfs_statfs(nd.path.dentry, &kbuf);
if (error)
goto dput_and_out;
@ -1611,7 +1611,7 @@ asmlinkage int irix_statvfs64(char __user *fname, struct irix_statvfs64 __user *
error = user_path_walk(fname, &nd);
if (error)
goto out;
error = vfs_statfs(nd.dentry, &kbuf);
error = vfs_statfs(nd.path.dentry, &kbuf);
if (error)
goto dput_and_out;

2
arch/parisc/hpux/sys_hpux.c
View file

@ -219,7 +219,7 @@ asmlinkage long hpux_statfs(const char __user *path,
error = user_path_walk(path, &nd);
if (!error) {
struct hpux_statfs tmp;
error = vfs_statfs_hpux(nd.dentry, &tmp);
error = vfs_statfs_hpux(nd.path.dentry, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
path_release(&nd);

18
arch/powerpc/platforms/cell/spufs/inode.c
View file

@ -1,3 +1,4 @@
/*
* SPU file system
*
@ -592,7 +593,7 @@ long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode,
ret = -EINVAL;
/* check if we are on spufs */
if (nd->dentry->d_sb->s_type != &spufs_type)
if (nd->path.dentry->d_sb->s_type != &spufs_type)
goto out;
/* don't accept undefined flags */
@ -600,9 +601,9 @@ long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode,
goto out;
/* only threads can be underneath a gang */
if (nd->dentry != nd->dentry->d_sb->s_root) {
if (nd->path.dentry != nd->path.dentry->d_sb->s_root) {
if ((flags & SPU_CREATE_GANG) ||
!SPUFS_I(nd->dentry->d_inode)->i_gang)
!SPUFS_I(nd->path.dentry->d_inode)->i_gang)
goto out;
}
@ -618,16 +619,17 @@ long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode,
mode &= ~current->fs->umask;
if (flags & SPU_CREATE_GANG)
return spufs_create_gang(nd->dentry->d_inode,
dentry, nd->mnt, mode);
return spufs_create_gang(nd->path.dentry->d_inode,
dentry, nd->path.mnt, mode);
else
return spufs_create_context(nd->dentry->d_inode,
dentry, nd->mnt, flags, mode, filp);
return spufs_create_context(nd->path.dentry->d_inode,
dentry, nd->path.mnt, flags, mode,
filp);
out_dput:
dput(dentry);
out_dir:
mutex_unlock(&nd->dentry->d_inode->i_mutex);
mutex_unlock(&nd->path.dentry->d_inode->i_mutex);
out:
return ret;
}

8
arch/sparc64/solaris/fs.c
View file

@ -434,8 +434,8 @@ asmlinkage int solaris_statvfs(u32 path, u32 buf)
error = user_path_walk(A(path),&nd);
if (!error) {
struct inode * inode = nd.dentry->d_inode;
error = report_statvfs(nd.mnt, inode, buf);
struct inode *inode = nd.path.dentry->d_inode;
error = report_statvfs(nd.path.mnt, inode, buf);
path_release(&nd);
}
return error;
@ -464,8 +464,8 @@ asmlinkage int solaris_statvfs64(u32 path, u32 buf)
lock_kernel();
error = user_path_walk(A(path), &nd);
if (!error) {
struct inode * inode = nd.dentry->d_inode;
error = report_statvfs64(nd.mnt, inode, buf);
struct inode *inode = nd.path.dentry->d_inode;
error = report_statvfs64(nd.path.mnt, inode, buf);
path_release(&nd);
}
unlock_kernel();

6
arch/um/drivers/mconsole_kern.c
View file

@ -145,8 +145,8 @@ void mconsole_proc(struct mc_request *req)
}
up_write(&super->s_umount);
nd.dentry = super->s_root;
nd.mnt = NULL;
nd.path.dentry = super->s_root;
nd.path.mnt = NULL;
nd.flags = O_RDONLY + 1;
nd.last_type = LAST_ROOT;
@ -159,7 +159,7 @@ void mconsole_proc(struct mc_request *req)
goto out_kill;
}
file = dentry_open(nd.dentry, nd.mnt, O_RDONLY);
file = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY);
if (IS_ERR(file)) {
mconsole_reply(req, "Failed to open file", 1, 0);
goto out_kill;

2
drivers/md/dm-table.c
View file

@ -361,7 +361,7 @@ static int lookup_device(const char *path, dev_t *dev)
if ((r = path_lookup(path, LOOKUP_FOLLOW, &nd)))
return r;
inode = nd.dentry->d_inode;
inode = nd.path.dentry->d_inode;
if (!inode) {
r = -ENOENT;
goto out;

10
drivers/mtd/mtdsuper.c
View file

@ -184,25 +184,25 @@ int get_sb_mtd(struct file_system_type *fs_type, int flags,
ret = path_lookup(dev_name, LOOKUP_FOLLOW, &nd);
DEBUG(1, "MTDSB: path_lookup() returned %d, inode %p\n",
ret, nd.dentry ? nd.dentry->d_inode : NULL);
ret, nd.path.dentry ? nd.path.dentry->d_inode : NULL);
if (ret)
return ret;
ret = -EINVAL;
if (!S_ISBLK(nd.dentry->d_inode->i_mode))
if (!S_ISBLK(nd.path.dentry->d_inode->i_mode))
goto out;
if (nd.mnt->mnt_flags & MNT_NODEV) {
if (nd.path.mnt->mnt_flags & MNT_NODEV) {
ret = -EACCES;
goto out;
}
if (imajor(nd.dentry->d_inode) != MTD_BLOCK_MAJOR)
if (imajor(nd.path.dentry->d_inode) != MTD_BLOCK_MAJOR)
goto not_an_MTD_device;
mtdnr = iminor(nd.dentry->d_inode);
mtdnr = iminor(nd.path.dentry->d_inode);
path_release(&nd);
return get_sb_mtd_nr(fs_type, flags, dev_name, data, mtdnr, fill_super,

22
fs/afs/mntpt.c
View file

@ -218,14 +218,14 @@ static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd)
_enter("%p{%s},{%s:%p{%s},}",
dentry,
dentry->d_name.name,
nd->mnt->mnt_devname,
nd->path.mnt->mnt_devname,
dentry,
nd->dentry->d_name.name);
nd->path.dentry->d_name.name);
dput(nd->dentry);
nd->dentry = dget(dentry);
dput(nd->path.dentry);
nd->path.dentry = dget(dentry);
newmnt = afs_mntpt_do_automount(nd->dentry);
newmnt = afs_mntpt_do_automount(nd->path.dentry);
if (IS_ERR(newmnt)) {
path_release(nd);
return (void *)newmnt;
@ -235,17 +235,17 @@ static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd)
err = do_add_mount(newmnt, nd, MNT_SHRINKABLE, &afs_vfsmounts);
switch (err) {
case 0:
dput(nd->dentry);
mntput(nd->mnt);
nd->mnt = newmnt;
nd->dentry = dget(newmnt->mnt_root);
dput(nd->path.dentry);
mntput(nd->path.mnt);
nd->path.mnt = newmnt;
nd->path.dentry = dget(newmnt->mnt_root);
schedule_delayed_work(&afs_mntpt_expiry_timer,
afs_mntpt_expiry_timeout * HZ);
break;
case -EBUSY:
/* someone else made a mount here whilst we were busy */
while (d_mountpoint(nd->dentry) &&
follow_down(&nd->mnt, &nd->dentry))
while (d_mountpoint(nd->path.dentry) &&
follow_down(&nd->path.mnt, &nd->path.dentry))
;
err = 0;
default:

3
fs/autofs4/root.c
View file

@ -368,7 +368,8 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
* so we don't need to follow the mount.
*/
if (d_mountpoint(dentry)) {
if (!autofs4_follow_mount(&nd->mnt, &nd->dentry)) {
if (!autofs4_follow_mount(&nd->path.mnt,
&nd->path.dentry)) {
status = -ENOENT;
goto out_error;
}

4
fs/block_dev.c
View file

@ -1397,12 +1397,12 @@ struct block_device *lookup_bdev(const char *path)
if (error)
return ERR_PTR(error);
inode = nd.dentry->d_inode;
inode = nd.path.dentry->d_inode;
error = -ENOTBLK;
if (!S_ISBLK(inode->i_mode))
goto fail;
error = -EACCES;
if (nd.mnt->mnt_flags & MNT_NODEV)
if (nd.path.mnt->mnt_flags & MNT_NODEV)
goto fail;
error = -ENOMEM;
bdev = bd_acquire(inode);

23
fs/cifs/cifs_dfs_ref.c
View file

@ -259,18 +259,18 @@ static int add_mount_helper(struct vfsmount *newmnt, struct nameidata *nd,
int err;
mntget(newmnt);
err = do_add_mount(newmnt, nd, nd->mnt->mnt_flags, mntlist);
err = do_add_mount(newmnt, nd, nd->path.mnt->mnt_flags, mntlist);
switch (err) {
case 0:
dput(nd->dentry);
mntput(nd->mnt);
nd->mnt = newmnt;
nd->dentry = dget(newmnt->mnt_root);
dput(nd->path.dentry);
mntput(nd->path.mnt);
nd->path.mnt = newmnt;
nd->path.dentry = dget(newmnt->mnt_root);
break;
case -EBUSY:
/* someone else made a mount here whilst we were busy */
while (d_mountpoint(nd->dentry) &&
follow_down(&nd->mnt, &nd->dentry))
while (d_mountpoint(nd->path.dentry) &&
follow_down(&nd->path.mnt, &nd->path.dentry))
;
err = 0;
default:
@ -307,8 +307,8 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
xid = GetXid();
dput(nd->dentry);
nd->dentry = dget(dentry);
dput(nd->path.dentry);
nd->path.dentry = dget(dentry);
cifs_sb = CIFS_SB(dentry->d_inode->i_sb);
ses = cifs_sb->tcon->ses;
@ -340,7 +340,8 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
rc = -EINVAL;
goto out_err;
}
mnt = cifs_dfs_do_refmount(nd->mnt, nd->dentry,
mnt = cifs_dfs_do_refmount(nd->path.mnt,
nd->path.dentry,
referrals[i].node_name);
cFYI(1, ("%s: cifs_dfs_do_refmount:%s , mnt:%p",
__FUNCTION__,
@ -357,7 +358,7 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
if (IS_ERR(mnt))
goto out_err;
nd->mnt->mnt_flags |= MNT_SHRINKABLE;
nd->path.mnt->mnt_flags |= MNT_SHRINKABLE;
rc = add_mount_helper(mnt, nd, &cifs_dfs_automount_list);
out:

2
fs/coda/pioctl.c
View file

@ -75,7 +75,7 @@ static int coda_pioctl(struct inode * inode, struct file * filp,
if ( error ) {
return error;
} else {
target_inode = nd.dentry->d_inode;
target_inode = nd.path.dentry->d_inode;
}
/* return if it is not a Coda inode */

4
fs/compat.c
View file

@ -241,7 +241,7 @@ asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs
error = user_path_walk(path, &nd);
if (!error) {
struct kstatfs tmp;
error = vfs_statfs(nd.dentry, &tmp);
error = vfs_statfs(nd.path.dentry, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
path_release(&nd);
@ -309,7 +309,7 @@ asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, s
error = user_path_walk(path, &nd);
if (!error) {
struct kstatfs tmp;
error = vfs_statfs(nd.dentry, &tmp);
error = vfs_statfs(nd.path.dentry, &tmp);
if (!error)
error = put_compat_statfs64(buf, &tmp);
path_release(&nd);

4
fs/configfs/symlink.c
View file

@ -99,8 +99,8 @@ static int get_target(const char *symname, struct nameidata *nd,
ret = path_lookup(symname, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, nd);
if (!ret) {
if (nd->dentry->d_sb == configfs_sb) {
*target = configfs_get_config_item(nd->dentry);
if (nd->path.dentry->d_sb == configfs_sb) {
*target = configfs_get_config_item(nd->path.dentry);
if (!*target) {
ret = -ENOENT;
path_release(nd);

7
fs/dquot.c
View file

@ -1633,14 +1633,15 @@ int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
error = path_lookup(path, LOOKUP_FOLLOW, &nd);
if (error < 0)
return error;
error = security_quota_on(nd.dentry);
error = security_quota_on(nd.path.dentry);
if (error)
goto out_path;
/* Quota file not on the same filesystem? */
if (nd.mnt->mnt_sb != sb)
if (nd.path.mnt->mnt_sb != sb)
error = -EXDEV;
else
error = vfs_quota_on_inode(nd.dentry->d_inode, type, format_id);
error = vfs_quota_on_inode(nd.path.dentry->d_inode, type,
format_id);
out_path:
path_release(&nd);
return error;

12
fs/ecryptfs/dentry.c
View file

@ -51,13 +51,13 @@ static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
goto out;
dentry_save = nd->dentry;
vfsmount_save = nd->mnt;
nd->dentry = lower_dentry;
nd->mnt = lower_mnt;
dentry_save = nd->path.dentry;
vfsmount_save = nd->path.mnt;
nd->path.dentry = lower_dentry;
nd->path.mnt = lower_mnt;
rc = lower_dentry->d_op->d_revalidate(lower_dentry, nd);
nd->dentry = dentry_save;
nd->mnt = vfsmount_save;
nd->path.dentry = dentry_save;
nd->path.mnt = vfsmount_save;
if (dentry->d_inode) {
struct inode *lower_inode =
ecryptfs_inode_to_lower(dentry->d_inode);

24
fs/ecryptfs/inode.c
View file

@ -77,13 +77,13 @@ ecryptfs_create_underlying_file(struct inode *lower_dir_inode,
struct vfsmount *vfsmount_save;
int rc;
dentry_save = nd->dentry;
vfsmount_save = nd->mnt;
nd->dentry = lower_dentry;
nd->mnt = lower_mnt;
dentry_save = nd->path.dentry;
vfsmount_save = nd->path.mnt;
nd->path.dentry = lower_dentry;
nd->path.mnt = lower_mnt;
rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd);
nd->dentry = dentry_save;
nd->mnt = vfsmount_save;
nd->path.dentry = dentry_save;
nd->path.mnt = vfsmount_save;
return rc;
}
@ -819,14 +819,14 @@ ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd)
int rc;
if (nd) {
struct vfsmount *vfsmnt_save = nd->mnt;
struct dentry *dentry_save = nd->dentry;
struct vfsmount *vfsmnt_save = nd->path.mnt;
struct dentry *dentry_save = nd->path.dentry;
nd->mnt = ecryptfs_dentry_to_lower_mnt(nd->dentry);
nd->dentry = ecryptfs_dentry_to_lower(nd->dentry);
nd->path.mnt = ecryptfs_dentry_to_lower_mnt(nd->path.dentry);
nd->path.dentry = ecryptfs_dentry_to_lower(nd->path.dentry);
rc = permission(ecryptfs_inode_to_lower(inode), mask, nd);
nd->mnt = vfsmnt_save;
nd->dentry = dentry_save;
nd->path.mnt = vfsmnt_save;
nd->path.dentry = dentry_save;
} else
rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL);
return rc;

4
fs/ecryptfs/main.c
View file

@ -513,8 +513,8 @@ static int ecryptfs_read_super(struct super_block *sb, const char *dev_name)
ecryptfs_printk(KERN_WARNING, "path_lookup() failed\n");
goto out;
}
lower_root = nd.dentry;
lower_mnt = nd.mnt;
lower_root = nd.path.dentry;
lower_mnt = nd.path.mnt;
ecryptfs_set_superblock_lower(sb, lower_root->d_sb);
sb->s_maxbytes = lower_root->d_sb->s_maxbytes;
sb->s_blocksize = lower_root->d_sb->s_blocksize;

4
fs/exec.c
View file

@ -112,7 +112,7 @@ asmlinkage long sys_uselib(const char __user * library)
goto out;
error = -EINVAL;
if (!S_ISREG(nd.dentry->d_inode->i_mode))
if (!S_ISREG(nd.path.dentry->d_inode->i_mode))
goto exit;
error = vfs_permission(&nd, MAY_READ | MAY_EXEC);
@ -652,7 +652,7 @@ struct file *open_exec(const char *name)
file = ERR_PTR(err);
if (!err) {
struct inode *inode = nd.dentry->d_inode;
struct inode *inode = nd.path.dentry->d_inode;
file = ERR_PTR(-EACCES);
if (S_ISREG(inode->i_mode)) {
int err = vfs_permission(&nd, MAY_EXEC);

4
fs/ext3/super.c
View file

@ -2758,12 +2758,12 @@ static int ext3_quota_on(struct super_block *sb, int type, int format_id,
if (err)
return err;
/* Quotafile not on the same filesystem? */
if (nd.mnt->mnt_sb != sb) {
if (nd.path.mnt->mnt_sb != sb) {
path_release(&nd);
return -EXDEV;
}
/* Quotafile not of fs root? */
if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
printk(KERN_WARNING
"EXT3-fs: Quota file not on filesystem root. "
"Journalled quota will not work.\n");

4
fs/ext4/super.c
View file

@ -3158,12 +3158,12 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
if (err)
return err;
/* Quotafile not on the same filesystem? */
if (nd.mnt->mnt_sb != sb) {
if (nd.path.mnt->mnt_sb != sb) {
path_release(&nd);
return -EXDEV;
}
/* Quotafile not of fs root? */
if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
printk(KERN_WARNING
"EXT4-fs: Quota file not on filesystem root. "
"Journalled quota will not work.\n");

5
fs/gfs2/ops_fstype.c
View file

@ -884,12 +884,13 @@ static struct super_block* get_gfs2_sb(const char *dev_name)
dev_name);
goto out;
}
error = vfs_getattr(nd.mnt, nd.dentry, &stat);
error = vfs_getattr(nd.path.mnt, nd.path.dentry, &stat);
fstype = get_fs_type("gfs2");
list_for_each_entry(s, &fstype->fs_supers, s_instances) {
if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) ||
(S_ISDIR(stat.mode) && s == nd.dentry->d_inode->i_sb)) {
(S_ISDIR(stat.mode) &&
s == nd.path.dentry->d_inode->i_sb)) {
sb = s;
goto free_nd;
}

2
fs/inotify_user.c
View file

@ -667,7 +667,7 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
goto fput_and_out;
/* inode held in place by reference to nd; dev by fget on fd */
inode = nd.dentry->d_inode;
inode = nd.path.dentry->d_inode;
dev = filp->private_data;
mutex_lock(&dev->up_mutex);

220
fs/namei.c
View file

@ -231,7 +231,7 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
struct vfsmount *mnt = NULL;
if (nd)
mnt = nd->mnt;
mnt = nd->path.mnt;
if (mask & MAY_WRITE) {
umode_t mode = inode->i_mode;
@ -296,7 +296,7 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
*/
int vfs_permission(struct nameidata *nd, int mask)
{
return permission(nd->dentry->d_inode, mask, nd);
return permission(nd->path.dentry->d_inode, mask, nd);
}
/**
@ -364,8 +364,8 @@ int deny_write_access(struct file * file)
void path_release(struct nameidata *nd)
{
dput(nd->dentry);
mntput(nd->mnt);
dput(nd->path.dentry);
mntput(nd->path.mnt);
}
/**
@ -530,15 +530,15 @@ walk_init_root(const char *name, struct nameidata *nd)
read_lock(&fs->lock);
if (fs->altroot && !(nd->flags & LOOKUP_NOALT)) {
nd->mnt = mntget(fs->altrootmnt);
nd->dentry = dget(fs->altroot);
nd->path.mnt = mntget(fs->altrootmnt);
nd->path.dentry = dget(fs->altroot);
read_unlock(&fs->lock);
if (__emul_lookup_dentry(name,nd))
return 0;
read_lock(&fs->lock);
}
nd->mnt = mntget(fs->rootmnt);
nd->dentry = dget(fs->root);
nd->path.mnt = mntget(fs->rootmnt);
nd->path.dentry = dget(fs->root);
read_unlock(&fs->lock);
return 1;
}
@ -581,17 +581,17 @@ fail:
static inline void dput_path(struct path *path, struct nameidata *nd)
{
dput(path->dentry);
if (path->mnt != nd->mnt)
if (path->mnt != nd->path.mnt)
mntput(path->mnt);
}
static inline void path_to_nameidata(struct path *path, struct nameidata *nd)
{
dput(nd->dentry);
if (nd->mnt != path->mnt)
mntput(nd->mnt);
nd->mnt = path->mnt;
nd->dentry = path->dentry;
dput(nd->path.dentry);
if (nd->path.mnt != path->mnt)
mntput(nd->path.mnt);
nd->path.mnt = path->mnt;
nd->path.dentry = path->dentry;
}
static __always_inline int __do_follow_link(struct path *path, struct nameidata *nd)
@ -603,7 +603,7 @@ static __always_inline int __do_follow_link(struct path *path, struct nameidata
touch_atime(path->mnt, dentry);
nd_set_link(nd, NULL);
if (path->mnt != nd->mnt) {
if (path->mnt != nd->path.mnt) {
path_to_nameidata(path, nd);
dget(dentry);
}
@ -733,37 +733,37 @@ static __always_inline void follow_dotdot(struct nameidata *nd)
while(1) {
struct vfsmount *parent;
struct dentry *old = nd->dentry;
struct dentry *old = nd->path.dentry;
read_lock(&fs->lock);
if (nd->dentry == fs->root &&
nd->mnt == fs->rootmnt) {
if (nd->path.dentry == fs->root &&
nd->path.mnt == fs->rootmnt) {
read_unlock(&fs->lock);
break;
}
read_unlock(&fs->lock);
spin_lock(&dcache_lock);
if (nd->dentry != nd->mnt->mnt_root) {
nd->dentry = dget(nd->dentry->d_parent);
if (nd->path.dentry != nd->path.mnt->mnt_root) {
nd->path.dentry = dget(nd->path.dentry->d_parent);
spin_unlock(&dcache_lock);
dput(old);
break;
}
spin_unlock(&dcache_lock);
spin_lock(&vfsmount_lock);
parent = nd->mnt->mnt_parent;
if (parent == nd->mnt) {
parent = nd->path.mnt->mnt_parent;
if (parent == nd->path.mnt) {
spin_unlock(&vfsmount_lock);
break;
}
mntget(parent);
nd->dentry = dget(nd->mnt->mnt_mountpoint);
nd->path.dentry = dget(nd->path.mnt->mnt_mountpoint);
spin_unlock(&vfsmount_lock);
dput(old);
mntput(nd->mnt);
nd->mnt = parent;
mntput(nd->path.mnt);
nd->path.mnt = parent;
}
follow_mount(&nd->mnt, &nd->dentry);
follow_mount(&nd->path.mnt, &nd->path.dentry);
}
/*
@ -774,8 +774,8 @@ static __always_inline void follow_dotdot(struct nameidata *nd)
static int do_lookup(struct nameidata *nd, struct qstr *name,
struct path *path)
{
struct vfsmount *mnt = nd->mnt;
struct dentry *dentry = __d_lookup(nd->dentry, name);
struct vfsmount *mnt = nd->path.mnt;
struct dentry *dentry = __d_lookup(nd->path.dentry, name);
if (!dentry)
goto need_lookup;
@ -788,7 +788,7 @@ done:
return 0;
need_lookup:
dentry = real_lookup(nd->dentry, name, nd);
dentry = real_lookup(nd->path.dentry, name, nd);
if (IS_ERR(dentry))
goto fail;
goto done;
@ -825,7 +825,7 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
if (!*name)
goto return_reval;
inode = nd->dentry->d_inode;
inode = nd->path.dentry->d_inode;
if (nd->depth)
lookup_flags = LOOKUP_FOLLOW | (nd->flags & LOOKUP_CONTINUE);
@ -873,7 +873,7 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
if (this.name[1] != '.')
break;
follow_dotdot(nd);
inode = nd->dentry->d_inode;
inode = nd->path.dentry->d_inode;
/* fallthrough */
case 1:
continue;
@ -882,8 +882,9 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
* See if the low-level filesystem might want
* to use its own hash..
*/
if (nd->dentry->d_op && nd->dentry->d_op->d_hash) {
err = nd->dentry->d_op->d_hash(nd->dentry, &this);
if (nd->path.dentry->d_op && nd->path.dentry->d_op->d_hash) {
err = nd->path.dentry->d_op->d_hash(nd->path.dentry,
&this);
if (err < 0)
break;
}
@ -905,7 +906,7 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
if (err)
goto return_err;
err = -ENOENT;
inode = nd->dentry->d_inode;
inode = nd->path.dentry->d_inode;
if (!inode)
break;
err = -ENOTDIR;
@ -933,13 +934,14 @@ last_component:
if (this.name[1] != '.')
break;
follow_dotdot(nd);
inode = nd->dentry->d_inode;
inode = nd->path.dentry->d_inode;
/* fallthrough */
case 1:
goto return_reval;
}
if (nd->dentry->d_op && nd->dentry->d_op->d_hash) {
err = nd->dentry->d_op->d_hash(nd->dentry, &this);
if (nd->path.dentry->d_op && nd->path.dentry->d_op->d_hash) {
err = nd->path.dentry->d_op->d_hash(nd->path.dentry,
&this);
if (err < 0)
break;
}
@ -952,7 +954,7 @@ last_component:
err = do_follow_link(&next, nd);
if (err)
goto return_err;
inode = nd->dentry->d_inode;
inode = nd->path.dentry->d_inode;
} else
path_to_nameidata(&next, nd);
err = -ENOENT;
@ -980,11 +982,12 @@ return_reval:
* We bypassed the ordinary revalidation routines.
* We may need to check the cached dentry for staleness.
*/
if (nd->dentry && nd->dentry->d_sb &&
(nd->dentry->d_sb->s_type->fs_flags & FS_REVAL_DOT)) {
if (nd->path.dentry && nd->path.dentry->d_sb &&
(nd->path.dentry->d_sb->s_type->fs_flags & FS_REVAL_DOT)) {
err = -ESTALE;
/* Note: we do not d_invalidate() */
if (!nd->dentry->d_op->d_revalidate(nd->dentry, nd))
if (!nd->path.dentry->d_op->d_revalidate(
nd->path.dentry, nd))
break;
}
return_base:
@ -1011,20 +1014,20 @@ static int link_path_walk(const char *name, struct nameidata *nd)
int result;
/* make sure the stuff we saved doesn't go away */
dget(save.dentry);
mntget(save.mnt);
dget(save.path.dentry);
mntget(save.path.mnt);
result = __link_path_walk(name, nd);
if (result == -ESTALE) {
*nd = save;
dget(nd->dentry);
mntget(nd->mnt);
dget(nd->path.dentry);
mntget(nd->path.mnt);
nd->flags |= LOOKUP_REVAL;
result = __link_path_walk(name, nd);
}
dput(save.dentry);
mntput(save.mnt);
dput(save.path.dentry);
mntput(save.path.mnt);
return result;
}
@ -1044,9 +1047,10 @@ static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
if (path_walk(name, nd))
return 0; /* something went wrong... */
if (!nd->dentry->d_inode || S_ISDIR(nd->dentry->d_inode->i_mode)) {
struct dentry *old_dentry = nd->dentry;
struct vfsmount *old_mnt = nd->mnt;
if (!nd->path.dentry->d_inode ||
S_ISDIR(nd->path.dentry->d_inode->i_mode)) {
struct dentry *old_dentry = nd->path.dentry;
struct vfsmount *old_mnt = nd->path.mnt;
struct qstr last = nd->last;
int last_type = nd->last_type;
struct fs_struct *fs = current->fs;
@ -1057,19 +1061,19 @@ static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
*/
nd->last_type = LAST_ROOT;
read_lock(&fs->lock);
nd->mnt = mntget(fs->rootmnt);
nd->dentry = dget(fs->root);
nd->path.mnt = mntget(fs->rootmnt);
nd->path.dentry = dget(fs->root);
read_unlock(&fs->lock);
if (path_walk(name, nd) == 0) {
if (nd->dentry->d_inode) {
if (nd->path.dentry->d_inode) {
dput(old_dentry);
mntput(old_mnt);
return 1;
}
path_release(nd);
}
nd->dentry = old_dentry;
nd->mnt = old_mnt;
nd->path.dentry = old_dentry;
nd->path.mnt = old_mnt;
nd->last = last;
nd->last_type = last_type;
}
@ -1089,8 +1093,8 @@ void set_fs_altroot(void)
goto set_it;
err = path_lookup(emul, LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_NOALT, &nd);
if (!err) {
mnt = nd.mnt;
dentry = nd.dentry;
mnt = nd.path.mnt;
dentry = nd.path.dentry;
}
set_it:
write_lock(&fs->lock);
@ -1121,20 +1125,20 @@ static int do_path_lookup(int dfd, const char *name,
if (*name=='/') {
read_lock(&fs->lock);
if (fs->altroot && !(nd->flags & LOOKUP_NOALT)) {
nd->mnt = mntget(fs->altrootmnt);
nd->dentry = dget(fs->altroot);
nd->path.mnt = mntget(fs->altrootmnt);
nd->path.dentry = dget(fs->altroot);
read_unlock(&fs->lock);
if (__emul_lookup_dentry(name,nd))
goto out; /* found in altroot */
read_lock(&fs->lock);
}
nd->mnt = mntget(fs->rootmnt);
nd->dentry = dget(fs->root);
nd->path.mnt = mntget(fs->rootmnt);
nd->path.dentry = dget(fs->root);
read_unlock(&fs->lock);
} else if (dfd == AT_FDCWD) {
read_lock(&fs->lock);
nd->mnt = mntget(fs->pwdmnt);
nd->dentry = dget(fs->pwd);
nd->path.mnt = mntget(fs->pwdmnt);
nd->path.dentry = dget(fs->pwd);
read_unlock(&fs->lock);
} else {
struct dentry *dentry;
@ -1154,17 +1158,17 @@ static int do_path_lookup(int dfd, const char *name,
if (retval)
goto fput_fail;
nd->mnt = mntget(file->f_path.mnt);
nd->dentry = dget(dentry);
nd->path.mnt = mntget(file->f_path.mnt);
nd->path.dentry = dget(dentry);
fput_light(file, fput_needed);
}
retval = path_walk(name, nd);
out:
if (unlikely(!retval && !audit_dummy_context() && nd->dentry &&
nd->dentry->d_inode))
audit_inode(name, nd->dentry);
if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
nd->path.dentry->d_inode))
audit_inode(name, nd->path.dentry);
out_fail:
return retval;
@ -1198,13 +1202,13 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt,
nd->flags = flags;
nd->depth = 0;
nd->mnt = mntget(mnt);
nd->dentry = dget(dentry);
nd->path.mnt = mntget(mnt);
nd->path.dentry = dget(dentry);
retval = path_walk(name, nd);
if (unlikely(!retval && !audit_dummy_context() && nd->dentry &&
nd->dentry->d_inode))
audit_inode(name, nd->dentry);
if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
nd->path.dentry->d_inode))
audit_inode(name, nd->path.dentry);
return retval;
@ -1323,10 +1327,10 @@ static struct dentry *lookup_hash(struct nameidata *nd)
{
int err;
err = permission(nd->dentry->d_inode, MAY_EXEC, nd);
err = permission(nd->path.dentry->d_inode, MAY_EXEC, nd);
if (err)
return ERR_PTR(err);
return __lookup_hash(&nd->last, nd->dentry, nd);
return __lookup_hash(&nd->last, nd->path.dentry, nd);
}
static int __lookup_one_len(const char *name, struct qstr *this,
@ -1585,7 +1589,7 @@ int vfs_create(struct inode *dir, struct dentry *dentry, int mode,
int may_open(struct nameidata *nd, int acc_mode, int flag)
{
struct dentry *dentry = nd->dentry;
struct dentry *dentry = nd->path.dentry;
struct inode *inode = dentry->d_inode;
int error;
@ -1606,7 +1610,7 @@ int may_open(struct nameidata *nd, int acc_mode, int flag)
if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
flag &= ~O_TRUNC;
} else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) {
if (nd->mnt->mnt_flags & MNT_NODEV)
if (nd->path.mnt->mnt_flags & MNT_NODEV)
return -EACCES;
flag &= ~O_TRUNC;
@ -1668,14 +1672,14 @@ static int open_namei_create(struct nameidata *nd, struct path *path,
int flag, int mode)
{
int error;
struct dentry *dir = nd->dentry;
struct dentry *dir = nd->path.dentry;
if (!IS_POSIXACL(dir->d_inode))
mode &= ~current->fs->umask;
error = vfs_create(dir->d_inode, path->dentry, mode, nd);
mutex_unlock(&dir->d_inode->i_mutex);
dput(nd->dentry);
nd->dentry = path->dentry;
dput(nd->path.dentry);
nd->path.dentry = path->dentry;
if (error)
return error;
/* Don't check for write permission, don't truncate */
@ -1742,11 +1746,11 @@ int open_namei(int dfd, const char *pathname, int flag,
if (nd->last_type != LAST_NORM || nd->last.name[nd->last.len])
goto exit;
dir = nd->dentry;
dir = nd->path.dentry;
nd->flags &= ~LOOKUP_PARENT;
mutex_lock(&dir->d_inode->i_mutex);
path.dentry = lookup_hash(nd);
path.mnt = nd->mnt;
path.mnt = nd->path.mnt;
do_last:
error = PTR_ERR(path.dentry);
@ -1851,10 +1855,10 @@ do_link:
__putname(nd->last.name);
goto exit;
}
dir = nd->dentry;
dir = nd->path.dentry;
mutex_lock(&dir->d_inode->i_mutex);
path.dentry = lookup_hash(nd);
path.mnt = nd->mnt;
path.mnt = nd->path.mnt;
__putname(nd->last.name);
goto do_last;
}
@ -1867,13 +1871,13 @@ do_link:
* Simple function to lookup and return a dentry and create it
* if it doesn't exist. Is SMP-safe.
*
* Returns with nd->dentry->d_inode->i_mutex locked.
* Returns with nd->path.dentry->d_inode->i_mutex locked.
*/
struct dentry *lookup_create(struct nameidata *nd, int is_dir)
{
struct dentry *dentry = ERR_PTR(-EEXIST);
mutex_lock_nested(&nd->dentry->d_inode->i_mutex, I_MUTEX_PARENT);
mutex_lock_nested(&nd->path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
/*
* Yucky last component or no last component at all?
* (foo/., foo/.., /////)
@ -1952,19 +1956,19 @@ asmlinkage long sys_mknodat(int dfd, const char __user *filename, int mode,
dentry = lookup_create(&nd, 0);
error = PTR_ERR(dentry);
if (!IS_POSIXACL(nd.dentry->d_inode))
if (!IS_POSIXACL(nd.path.dentry->d_inode))
mode &= ~current->fs->umask;
if (!IS_ERR(dentry)) {
switch (mode & S_IFMT) {
case 0: case S_IFREG:
error = vfs_create(nd.dentry->d_inode,dentry,mode,&nd);
error = vfs_create(nd.path.dentry->d_inode,dentry,mode,&nd);
break;
case S_IFCHR: case S_IFBLK:
error = vfs_mknod(nd.dentry->d_inode,dentry,mode,
error = vfs_mknod(nd.path.dentry->d_inode,dentry,mode,
new_decode_dev(dev));
break;
case S_IFIFO: case S_IFSOCK:
error = vfs_mknod(nd.dentry->d_inode,dentry,mode,0);
error = vfs_mknod(nd.path.dentry->d_inode,dentry,mode,0);
break;
case S_IFDIR:
error = -EPERM;
@ -1974,7 +1978,7 @@ asmlinkage long sys_mknodat(int dfd, const char __user *filename, int mode,
}
dput(dentry);
}
mutex_unlock(&nd.dentry->d_inode->i_mutex);
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_release(&nd);
out:
putname(tmp);
@ -2029,12 +2033,12 @@ asmlinkage long sys_mkdirat(int dfd, const char __user *pathname, int mode)
if (IS_ERR(dentry))
goto out_unlock;
if (!IS_POSIXACL(nd.dentry->d_inode))
if (!IS_POSIXACL(nd.path.dentry->d_inode))
mode &= ~current->fs->umask;
error = vfs_mkdir(nd.dentry->d_inode, dentry, mode);
error = vfs_mkdir(nd.path.dentry->d_inode, dentry, mode);
dput(dentry);
out_unlock:
mutex_unlock(&nd.dentry->d_inode->i_mutex);
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_release(&nd);
out:
putname(tmp);
@ -2133,15 +2137,15 @@ static long do_rmdir(int dfd, const char __user *pathname)
error = -EBUSY;
goto exit1;
}
mutex_lock_nested(&nd.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
dentry = lookup_hash(&nd);
error = PTR_ERR(dentry);
if (IS_ERR(dentry))
goto exit2;
error = vfs_rmdir(nd.dentry->d_inode, dentry);
error = vfs_rmdir(nd.path.dentry->d_inode, dentry);
dput(dentry);
exit2:
mutex_unlock(&nd.dentry->d_inode->i_mutex);
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
exit1:
path_release(&nd);
exit:
@ -2209,7 +2213,7 @@ static long do_unlinkat(int dfd, const char __user *pathname)
error = -EISDIR;
if (nd.last_type != LAST_NORM)
goto exit1;
mutex_lock_nested(&nd.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
dentry = lookup_hash(&nd);
error = PTR_ERR(dentry);
if (!IS_ERR(dentry)) {
@ -2219,11 +2223,11 @@ static long do_unlinkat(int dfd, const char __user *pathname)
inode = dentry->d_inode;
if (inode)
atomic_inc(&inode->i_count);
error = vfs_unlink(nd.dentry->d_inode, dentry);
error = vfs_unlink(nd.path.dentry->d_inode, dentry);
exit2:
dput(dentry);
}
mutex_unlock(&nd.dentry->d_inode->i_mutex);
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
if (inode)
iput(inode); /* truncate the inode here */
exit1:
@ -2300,10 +2304,10 @@ asmlinkage long sys_symlinkat(const char __user *oldname,
if (IS_ERR(dentry))
goto out_unlock;
error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO);
error = vfs_symlink(nd.path.dentry->d_inode, dentry, from, S_IALLUGO);
dput(dentry);
out_unlock:
mutex_unlock(&nd.dentry->d_inode->i_mutex);
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_release(&nd);
out:
putname(to);
@ -2389,16 +2393,16 @@ asmlinkage long sys_linkat(int olddfd, const char __user *oldname,
if (error)
goto out;
error = -EXDEV;
if (old_nd.mnt != nd.mnt)
if (old_nd.path.mnt != nd.path.mnt)
goto out_release;
new_dentry = lookup_create(&nd, 0);
error = PTR_ERR(new_dentry);
if (IS_ERR(new_dentry))
goto out_unlock;
error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
error = vfs_link(old_nd.path.dentry, nd.path.dentry->d_inode, new_dentry);
dput(new_dentry);
out_unlock:
mutex_unlock(&nd.dentry->d_inode->i_mutex);
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
out_release:
path_release(&nd);
out:
@ -2578,15 +2582,15 @@ static int do_rename(int olddfd, const char *oldname,
goto exit1;
error = -EXDEV;
if (oldnd.mnt != newnd.mnt)
if (oldnd.path.mnt != newnd.path.mnt)
goto exit2;
old_dir = oldnd.dentry;
old_dir = oldnd.path.dentry;
error = -EBUSY;
if (oldnd.last_type != LAST_NORM)
goto exit2;
new_dir = newnd.dentry;
new_dir = newnd.path.dentry;
if (newnd.last_type != LAST_NORM)
goto exit2;

185
fs/namespace.c
View file

@ -157,13 +157,13 @@ static void __touch_mnt_namespace(struct mnt_namespace *ns)
static void detach_mnt(struct vfsmount *mnt, struct nameidata *old_nd)
{
old_nd->dentry = mnt->mnt_mountpoint;
old_nd->mnt = mnt->mnt_parent;
old_nd->path.dentry = mnt->mnt_mountpoint;
old_nd->path.mnt = mnt->mnt_parent;
mnt->mnt_parent = mnt;
mnt->mnt_mountpoint = mnt->mnt_root;
list_del_init(&mnt->mnt_child);
list_del_init(&mnt->mnt_hash);
old_nd->dentry->d_mounted--;
old_nd->path.dentry->d_mounted--;
}
void mnt_set_mountpoint(struct vfsmount *mnt, struct dentry *dentry,
@ -176,10 +176,10 @@ void mnt_set_mountpoint(struct vfsmount *mnt, struct dentry *dentry,
static void attach_mnt(struct vfsmount *mnt, struct nameidata *nd)
{
mnt_set_mountpoint(nd->mnt, nd->dentry, mnt);
mnt_set_mountpoint(nd->path.mnt, nd->path.dentry, mnt);
list_add_tail(&mnt->mnt_hash, mount_hashtable +
hash(nd->mnt, nd->dentry));
list_add_tail(&mnt->mnt_child, &nd->mnt->mnt_mounts);
hash(nd->path.mnt, nd->path.dentry));
list_add_tail(&mnt->mnt_child, &nd->path.mnt->mnt_mounts);
}
/*
@ -679,20 +679,20 @@ asmlinkage long sys_umount(char __user * name, int flags)
if (retval)
goto out;
retval = -EINVAL;
if (nd.dentry != nd.mnt->mnt_root)
if (nd.path.dentry != nd.path.mnt->mnt_root)
goto dput_and_out;
if (!check_mnt(nd.mnt))
if (!check_mnt(nd.path.mnt))
goto dput_and_out;
retval = -EPERM;
if (!capable(CAP_SYS_ADMIN))
goto dput_and_out;
retval = do_umount(nd.mnt, flags);
retval = do_umount(nd.path.mnt, flags);
dput_and_out:
/* we mustn't call path_put() as that would clear mnt_expiry_mark */
dput(nd.dentry);
mntput_no_expire(nd.mnt);
dput(nd.path.dentry);
mntput_no_expire(nd.path.mnt);
out:
return retval;
}
@ -715,10 +715,10 @@ static int mount_is_safe(struct nameidata *nd)
return 0;
return -EPERM;
#ifdef notyet
if (S_ISLNK(nd->dentry->d_inode->i_mode))
if (S_ISLNK(nd->path.dentry->d_inode->i_mode))
return -EPERM;
if (nd->dentry->d_inode->i_mode & S_ISVTX) {
if (current->uid != nd->dentry->d_inode->i_uid)
if (nd->path.dentry->d_inode->i_mode & S_ISVTX) {
if (current->uid != nd->path.dentry->d_inode->i_uid)
return -EPERM;
}
if (vfs_permission(nd, MAY_WRITE))
@ -767,8 +767,8 @@ struct vfsmount *copy_tree(struct vfsmount *mnt, struct dentry *dentry,
q = q->mnt_parent;
}
p = s;
nd.mnt = q;
nd.dentry = p->mnt_mountpoint;
nd.path.mnt = q;
nd.path.dentry = p->mnt_mountpoint;
q = clone_mnt(p, p->mnt_root, flag);
if (!q)
goto Enomem;
@ -877,8 +877,8 @@ static int attach_recursive_mnt(struct vfsmount *source_mnt,
struct nameidata *nd, struct nameidata *parent_nd)
{
LIST_HEAD(tree_list);
struct vfsmount *dest_mnt = nd->mnt;
struct dentry *dest_dentry = nd->dentry;
struct vfsmount *dest_mnt = nd->path.mnt;
struct dentry *dest_dentry = nd->path.dentry;
struct vfsmount *child, *p;
if (propagate_mnt(dest_mnt, dest_dentry, source_mnt, &tree_list))
@ -913,13 +913,13 @@ static int graft_tree(struct vfsmount *mnt, struct nameidata *nd)
if (mnt->mnt_sb->s_flags & MS_NOUSER)
return -EINVAL;
if (S_ISDIR(nd->dentry->d_inode->i_mode) !=
if (S_ISDIR(nd->path.dentry->d_inode->i_mode) !=
S_ISDIR(mnt->mnt_root->d_inode->i_mode))
return -ENOTDIR;
err = -ENOENT;
mutex_lock(&nd->dentry->d_inode->i_mutex);
if (IS_DEADDIR(nd->dentry->d_inode))
mutex_lock(&nd->path.dentry->d_inode->i_mutex);
if (IS_DEADDIR(nd->path.dentry->d_inode))
goto out_unlock;
err = security_sb_check_sb(mnt, nd);
@ -927,10 +927,10 @@ static int graft_tree(struct vfsmount *mnt, struct nameidata *nd)
goto out_unlock;
err = -ENOENT;
if (IS_ROOT(nd->dentry) || !d_unhashed(nd->dentry))
if (IS_ROOT(nd->path.dentry) || !d_unhashed(nd->path.dentry))
err = attach_recursive_mnt(mnt, nd, NULL);
out_unlock:
mutex_unlock(&nd->dentry->d_inode->i_mutex);
mutex_unlock(&nd->path.dentry->d_inode->i_mutex);
if (!err)
security_sb_post_addmount(mnt, nd);
return err;
@ -942,14 +942,14 @@ out_unlock:
*/
static noinline int do_change_type(struct nameidata *nd, int flag)
{
struct vfsmount *m, *mnt = nd->mnt;
struct vfsmount *m, *mnt = nd->path.mnt;
int recurse = flag & MS_REC;
int type = flag & ~MS_REC;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (nd->dentry != nd->mnt->mnt_root)
if (nd->path.dentry != nd->path.mnt->mnt_root)
return -EINVAL;
down_write(&namespace_sem);
@ -981,17 +981,17 @@ static noinline int do_loopback(struct nameidata *nd, char *old_name,
down_write(&namespace_sem);
err = -EINVAL;
if (IS_MNT_UNBINDABLE(old_nd.mnt))
goto out;
if (IS_MNT_UNBINDABLE(old_nd.path.mnt))
goto out;
if (!check_mnt(nd->mnt) || !check_mnt(old_nd.mnt))
if (!check_mnt(nd->path.mnt) || !check_mnt(old_nd.path.mnt))
goto out;
err = -ENOMEM;
if (recurse)
mnt = copy_tree(old_nd.mnt, old_nd.dentry, 0);
mnt = copy_tree(old_nd.path.mnt, old_nd.path.dentry, 0);
else
mnt = clone_mnt(old_nd.mnt, old_nd.dentry, 0);
mnt = clone_mnt(old_nd.path.mnt, old_nd.path.dentry, 0);
if (!mnt)
goto out;
@ -1021,24 +1021,24 @@ static noinline int do_remount(struct nameidata *nd, int flags, int mnt_flags,
void *data)
{
int err;
struct super_block *sb = nd->mnt->mnt_sb;
struct super_block *sb = nd->path.mnt->mnt_sb;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (!check_mnt(nd->mnt))
if (!check_mnt(nd->path.mnt))
return -EINVAL;
if (nd->dentry != nd->mnt->mnt_root)
if (nd->path.dentry != nd->path.mnt->mnt_root)
return -EINVAL;
down_write(&sb->s_umount);
err = do_remount_sb(sb, flags, data, 0);
if (!err)
nd->mnt->mnt_flags = mnt_flags;
nd->path.mnt->mnt_flags = mnt_flags;
up_write(&sb->s_umount);
if (!err)
security_sb_post_remount(nd->mnt, flags, data);
security_sb_post_remount(nd->path.mnt, flags, data);
return err;
}
@ -1069,56 +1069,60 @@ static noinline int do_move_mount(struct nameidata *nd, char *old_name)
return err;
down_write(&namespace_sem);
while (d_mountpoint(nd->dentry) && follow_down(&nd->mnt, &nd->dentry))
while (d_mountpoint(nd->path.dentry) &&
follow_down(&nd->path.mnt, &nd->path.dentry))
;
err = -EINVAL;
if (!check_mnt(nd->mnt) || !check_mnt(old_nd.mnt))
if (!check_mnt(nd->path.mnt) || !check_mnt(old_nd.path.mnt))
goto out;
err = -ENOENT;
mutex_lock(&nd->dentry->d_inode->i_mutex);
if (IS_DEADDIR(nd->dentry->d_inode))
mutex_lock(&nd->path.dentry->d_inode->i_mutex);
if (IS_DEADDIR(nd->path.dentry->d_inode))
goto out1;
if (!IS_ROOT(nd->dentry) && d_unhashed(nd->dentry))
if (!IS_ROOT(nd->path.dentry) && d_unhashed(nd->path.dentry))
goto out1;
err = -EINVAL;
if (old_nd.dentry != old_nd.mnt->mnt_root)
if (old_nd.path.dentry != old_nd.path.mnt->mnt_root)
goto out1;
if (old_nd.mnt == old_nd.mnt->mnt_parent)
if (old_nd.path.mnt == old_nd.path.mnt->mnt_parent)
goto out1;
if (S_ISDIR(nd->dentry->d_inode->i_mode) !=
S_ISDIR(old_nd.dentry->d_inode->i_mode))
if (S_ISDIR(nd->path.dentry->d_inode->i_mode) !=
S_ISDIR(old_nd.path.dentry->d_inode->i_mode))
goto out1;
/*
* Don't move a mount residing in a shared parent.
*/
if (old_nd.mnt->mnt_parent && IS_MNT_SHARED(old_nd.mnt->mnt_parent))
if (old_nd.path.mnt->mnt_parent &&
IS_MNT_SHARED(old_nd.path.mnt->mnt_parent))
goto out1;
/*
* Don't move a mount tree containing unbindable mounts to a destination
* mount which is shared.
*/
if (IS_MNT_SHARED(nd->mnt) && tree_contains_unbindable(old_nd.mnt))
if (IS_MNT_SHARED(nd->path.mnt) &&
tree_contains_unbindable(old_nd.path.mnt))
goto out1;
err = -ELOOP;
for (p = nd->mnt; p->mnt_parent != p; p = p->mnt_parent)
if (p == old_nd.mnt)
for (p = nd->path.mnt; p->mnt_parent != p; p = p->mnt_parent)
if (p == old_nd.path.mnt)
goto out1;
if ((err = attach_recursive_mnt(old_nd.mnt, nd, &parent_nd)))
err = attach_recursive_mnt(old_nd.path.mnt, nd, &parent_nd);
if (err)
goto out1;
spin_lock(&vfsmount_lock);
/* if the mount is moved, it should no longer be expire
* automatically */
list_del_init(&old_nd.mnt->mnt_expire);
list_del_init(&old_nd.path.mnt->mnt_expire);
spin_unlock(&vfsmount_lock);
out1:
mutex_unlock(&nd->dentry->d_inode->i_mutex);
mutex_unlock(&nd->path.dentry->d_inode->i_mutex);
out:
up_write(&namespace_sem);
if (!err)
@ -1162,16 +1166,17 @@ int do_add_mount(struct vfsmount *newmnt, struct nameidata *nd,
down_write(&namespace_sem);
/* Something was mounted here while we slept */
while (d_mountpoint(nd->dentry) && follow_down(&nd->mnt, &nd->dentry))
while (d_mountpoint(nd->path.dentry) &&
follow_down(&nd->path.mnt, &nd->path.dentry))
;
err = -EINVAL;
if (!check_mnt(nd->mnt))
if (!check_mnt(nd->path.mnt))
goto unlock;
/* Refuse the same filesystem on the same mount point */
err = -EBUSY;
if (nd->mnt->mnt_sb == newmnt->mnt_sb &&
nd->mnt->mnt_root == nd->dentry)
if (nd->path.mnt->mnt_sb == newmnt->mnt_sb &&
nd->path.mnt->mnt_root == nd->path.dentry)
goto unlock;
err = -EINVAL;
@ -1697,12 +1702,14 @@ static void chroot_fs_refs(struct nameidata *old_nd, struct nameidata *new_nd)
if (fs) {
atomic_inc(&fs->count);
task_unlock(p);
if (fs->root == old_nd->dentry
&& fs->rootmnt == old_nd->mnt)
set_fs_root(fs, new_nd->mnt, new_nd->dentry);
if (fs->pwd == old_nd->dentry
&& fs->pwdmnt == old_nd->mnt)
set_fs_pwd(fs, new_nd->mnt, new_nd->dentry);
if (fs->root == old_nd->path.dentry
&& fs->rootmnt == old_nd->path.mnt)
set_fs_root(fs, new_nd->path.mnt,
new_nd->path.dentry);
if (fs->pwd == old_nd->path.dentry
&& fs->pwdmnt == old_nd->path.mnt)
set_fs_pwd(fs, new_nd->path.mnt,
new_nd->path.dentry);
put_fs_struct(fs);
} else
task_unlock(p);
@ -1752,7 +1759,7 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
if (error)
goto out0;
error = -EINVAL;
if (!check_mnt(new_nd.mnt))
if (!check_mnt(new_nd.path.mnt))
goto out1;
error = __user_walk(put_old, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &old_nd);
@ -1766,55 +1773,59 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
}
read_lock(&current->fs->lock);
user_nd.mnt = mntget(current->fs->rootmnt);
user_nd.dentry = dget(current->fs->root);
user_nd.path.mnt = mntget(current->fs->rootmnt);
user_nd.path.dentry = dget(current->fs->root);
read_unlock(&current->fs->lock);
down_write(&namespace_sem);
mutex_lock(&old_nd.dentry->d_inode->i_mutex);
mutex_lock(&old_nd.path.dentry->d_inode->i_mutex);
error = -EINVAL;
if (IS_MNT_SHARED(old_nd.mnt) ||
IS_MNT_SHARED(new_nd.mnt->mnt_parent) ||
IS_MNT_SHARED(user_nd.mnt->mnt_parent))
if (IS_MNT_SHARED(old_nd.path.mnt) ||
IS_MNT_SHARED(new_nd.path.mnt->mnt_parent) ||
IS_MNT_SHARED(user_nd.path.mnt->mnt_parent))
goto out2;
if (!check_mnt(user_nd.mnt))
if (!check_mnt(user_nd.path.mnt))
goto out2;
error = -ENOENT;
if (IS_DEADDIR(new_nd.dentry->d_inode))
if (IS_DEADDIR(new_nd.path.dentry->d_inode))
goto out2;
if (d_unhashed(new_nd.dentry) && !IS_ROOT(new_nd.dentry))
if (d_unhashed(new_nd.path.dentry) && !IS_ROOT(new_nd.path.dentry))
goto out2;
if (d_unhashed(old_nd.dentry) && !IS_ROOT(old_nd.dentry))
if (d_unhashed(old_nd.path.dentry) && !IS_ROOT(old_nd.path.dentry))
goto out2;
error = -EBUSY;
if (new_nd.mnt == user_nd.mnt || old_nd.mnt == user_nd.mnt)
if (new_nd.path.mnt == user_nd.path.mnt ||
old_nd.path.mnt == user_nd.path.mnt)
goto out2; /* loop, on the same file system */
error = -EINVAL;
if (user_nd.mnt->mnt_root != user_nd.dentry)
if (user_nd.path.mnt->mnt_root != user_nd.path.dentry)
goto out2; /* not a mountpoint */
if (user_nd.mnt->mnt_parent == user_nd.mnt)
if (user_nd.path.mnt->mnt_parent == user_nd.path.mnt)
goto out2; /* not attached */
if (new_nd.mnt->mnt_root != new_nd.dentry)
if (new_nd.path.mnt->mnt_root != new_nd.path.dentry)
goto out2; /* not a mountpoint */
if (new_nd.mnt->mnt_parent == new_nd.mnt)
if (new_nd.path.mnt->mnt_parent == new_nd.path.mnt)
goto out2; /* not attached */
tmp = old_nd.mnt; /* make sure we can reach put_old from new_root */
/* make sure we can reach put_old from new_root */
tmp = old_nd.path.mnt;
spin_lock(&vfsmount_lock);
if (tmp != new_nd.mnt) {
if (tmp != new_nd.path.mnt) {
for (;;) {
if (tmp->mnt_parent == tmp)
goto out3; /* already mounted on put_old */
if (tmp->mnt_parent == new_nd.mnt)
if (tmp->mnt_parent == new_nd.path.mnt)
break;
tmp = tmp->mnt_parent;
}
if (!is_subdir(tmp->mnt_mountpoint, new_nd.dentry))
if (!is_subdir(tmp->mnt_mountpoint, new_nd.path.dentry))
goto out3;
} else if (!is_subdir(old_nd.dentry, new_nd.dentry))
} else if (!is_subdir(old_nd.path.dentry, new_nd.path.dentry))
goto out3;
detach_mnt(new_nd.mnt, &parent_nd);
detach_mnt(user_nd.mnt, &root_parent);
attach_mnt(user_nd.mnt, &old_nd); /* mount old root on put_old */
attach_mnt(new_nd.mnt, &root_parent); /* mount new_root on / */
detach_mnt(new_nd.path.mnt, &parent_nd);
detach_mnt(user_nd.path.mnt, &root_parent);
/* mount old root on put_old */
attach_mnt(user_nd.path.mnt, &old_nd);
/* mount new_root on / */
attach_mnt(new_nd.path.mnt, &root_parent);
touch_mnt_namespace(current->nsproxy->mnt_ns);
spin_unlock(&vfsmount_lock);
chroot_fs_refs(&user_nd, &new_nd);
@ -1823,7 +1834,7 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
path_release(&root_parent);
path_release(&parent_nd);
out2:
mutex_unlock(&old_nd.dentry->d_inode->i_mutex);
mutex_unlock(&old_nd.path.dentry->d_inode->i_mutex);
up_write(&namespace_sem);
path_release(&user_nd);
path_release(&old_nd);

27
fs/nfs/namespace.c
View file

@ -107,38 +107,40 @@ static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
BUG_ON(IS_ROOT(dentry));
dprintk("%s: enter\n", __FUNCTION__);
dput(nd->dentry);
nd->dentry = dget(dentry);
dput(nd->path.dentry);
nd->path.dentry = dget(dentry);
/* Look it up again */
parent = dget_parent(nd->dentry);
parent = dget_parent(nd->path.dentry);
err = server->nfs_client->rpc_ops->lookup(parent->d_inode,
&nd->dentry->d_name,
&nd->path.dentry->d_name,
&fh, &fattr);
dput(parent);
if (err != 0)
goto out_err;
if (fattr.valid & NFS_ATTR_FATTR_V4_REFERRAL)
mnt = nfs_do_refmount(nd->mnt, nd->dentry);
mnt = nfs_do_refmount(nd->path.mnt, nd->path.dentry);
else
mnt = nfs_do_submount(nd->mnt, nd->dentry, &fh, &fattr);
mnt = nfs_do_submount(nd->path.mnt, nd->path.dentry, &fh,
&fattr);
err = PTR_ERR(mnt);
if (IS_ERR(mnt))
goto out_err;
mntget(mnt);
err = do_add_mount(mnt, nd, nd->mnt->mnt_flags|MNT_SHRINKABLE, &nfs_automount_list);
err = do_add_mount(mnt, nd, nd->path.mnt->mnt_flags|MNT_SHRINKABLE,
&nfs_automount_list);
if (err < 0) {
mntput(mnt);
if (err == -EBUSY)
goto out_follow;
goto out_err;
}
mntput(nd->mnt);
dput(nd->dentry);
nd->mnt = mnt;
nd->dentry = dget(mnt->mnt_root);
mntput(nd->path.mnt);
dput(nd->path.dentry);
nd->path.mnt = mnt;
nd->path.dentry = dget(mnt->mnt_root);
schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout);
out:
dprintk("%s: done, returned %d\n", __FUNCTION__, err);
@ -149,7 +151,8 @@ out_err:
path_release(nd);
goto out;
out_follow:
while(d_mountpoint(nd->dentry) && follow_down(&nd->mnt, &nd->dentry))
while (d_mountpoint(nd->path.dentry) &&
follow_down(&nd->path.mnt, &nd->path.dentry))
;
err = 0;
goto out;

8
fs/nfs/nfs4proc.c
View file

@ -1384,11 +1384,11 @@ out_close:
struct dentry *
nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
struct dentry *parent;
struct path path = {
.mnt = nd->mnt,
.mnt = nd->path.mnt,
.dentry = dentry,
};
struct dentry *parent;
struct iattr attr;
struct rpc_cred *cred;
struct nfs4_state *state;
@ -1433,7 +1433,7 @@ int
nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
{
struct path path = {
.mnt = nd->mnt,
.mnt = nd->path.mnt,
.dentry = dentry,
};
struct rpc_cred *cred;
@ -1885,7 +1885,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
int flags, struct nameidata *nd)
{
struct path path = {
.mnt = nd->mnt,
.mnt = nd->path.mnt,
.dentry = dentry,
};
struct nfs4_state *state;

2
fs/nfsctl.c
View file

@ -41,7 +41,7 @@ static struct file *do_open(char *name, int flags)
error = may_open(&nd, MAY_WRITE, FMODE_WRITE);
if (!error)
return dentry_open(nd.dentry, nd.mnt, flags);
return dentry_open(nd.path.dentry, nd.path.mnt, flags);
path_release(&nd);
return ERR_PTR(error);

35
fs/nfsd/export.c
View file

@ -169,8 +169,8 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
goto out;
dprintk("Found the path %s\n", buf);
key.ek_mnt = nd.mnt;
key.ek_dentry = nd.dentry;
key.ek_mnt = nd.path.mnt;
key.ek_dentry = nd.path.dentry;
ek = svc_expkey_update(&key, ek);
if (ek)
@ -507,7 +507,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
struct svc_export exp, *expp;
int an_int;
nd.dentry = NULL;
nd.path.dentry = NULL;
exp.ex_path = NULL;
/* fs locations */
@ -547,8 +547,8 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
exp.h.flags = 0;
exp.ex_client = dom;
exp.ex_mnt = nd.mnt;
exp.ex_dentry = nd.dentry;
exp.ex_mnt = nd.path.mnt;
exp.ex_dentry = nd.path.dentry;
exp.ex_path = kstrdup(buf, GFP_KERNEL);
err = -ENOMEM;
if (!exp.ex_path)
@ -610,7 +610,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
goto out;
}
err = check_export(nd.dentry->d_inode, exp.ex_flags,
err = check_export(nd.path.dentry->d_inode, exp.ex_flags,
exp.ex_uuid);
if (err) goto out;
}
@ -629,7 +629,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
nfsd4_fslocs_free(&exp.ex_fslocs);
kfree(exp.ex_uuid);
kfree(exp.ex_path);
if (nd.dentry)
if (nd.path.dentry)
path_release(&nd);
out_no_path:
if (dom)
@ -1030,7 +1030,7 @@ exp_export(struct nfsctl_export *nxp)
goto out_unlock;
err = -EINVAL;
exp = exp_get_by_name(clp, nd.mnt, nd.dentry, NULL);
exp = exp_get_by_name(clp, nd.path.mnt, nd.path.dentry, NULL);
memset(&new, 0, sizeof(new));
@ -1038,7 +1038,8 @@ exp_export(struct nfsctl_export *nxp)
if ((nxp->ex_flags & NFSEXP_FSID) &&
(!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) &&
fsid_key->ek_mnt &&
(fsid_key->ek_mnt != nd.mnt || fsid_key->ek_dentry != nd.dentry) )
(fsid_key->ek_mnt != nd.path.mnt ||
fsid_key->ek_dentry != nd.path.dentry))
goto finish;
if (!IS_ERR(exp)) {
@ -1054,7 +1055,7 @@ exp_export(struct nfsctl_export *nxp)
goto finish;
}
err = check_export(nd.dentry->d_inode, nxp->ex_flags, NULL);
err = check_export(nd.path.dentry->d_inode, nxp->ex_flags, NULL);
if (err) goto finish;
err = -ENOMEM;
@ -1067,8 +1068,8 @@ exp_export(struct nfsctl_export *nxp)
if (!new.ex_path)
goto finish;
new.ex_client = clp;
new.ex_mnt = nd.mnt;
new.ex_dentry = nd.dentry;
new.ex_mnt = nd.path.mnt;
new.ex_dentry = nd.path.dentry;
new.ex_flags = nxp->ex_flags;
new.ex_anon_uid = nxp->ex_anon_uid;
new.ex_anon_gid = nxp->ex_anon_gid;
@ -1148,7 +1149,7 @@ exp_unexport(struct nfsctl_export *nxp)
goto out_domain;
err = -EINVAL;
exp = exp_get_by_name(dom, nd.mnt, nd.dentry, NULL);
exp = exp_get_by_name(dom, nd.path.mnt, nd.path.dentry, NULL);
path_release(&nd);
if (IS_ERR(exp))
goto out_domain;
@ -1185,12 +1186,12 @@ exp_rootfh(svc_client *clp, char *path, struct knfsd_fh *f, int maxsize)
printk("nfsd: exp_rootfh path not found %s", path);
return err;
}
inode = nd.dentry->d_inode;
inode = nd.path.dentry->d_inode;
dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
path, nd.dentry, clp->name,
path, nd.path.dentry, clp->name,
inode->i_sb->s_id, inode->i_ino);
exp = exp_parent(clp, nd.mnt, nd.dentry, NULL);
exp = exp_parent(clp, nd.path.mnt, nd.path.dentry, NULL);
if (IS_ERR(exp)) {
err = PTR_ERR(exp);
goto out;
@ -1200,7 +1201,7 @@ exp_rootfh(svc_client *clp, char *path, struct knfsd_fh *f, int maxsize)
* fh must be initialized before calling fh_compose
*/
fh_init(&fh, maxsize);
if (fh_compose(&fh, exp, nd.dentry, NULL))
if (fh_compose(&fh, exp, nd.path.dentry, NULL))
err = -EINVAL;
else
err = 0;

32
fs/nfsd/nfs4recover.c
View file

@ -120,9 +120,9 @@ out_no_tfm:
static void
nfsd4_sync_rec_dir(void)
{
mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
nfsd_sync_dir(rec_dir.dentry);
mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
mutex_lock(&rec_dir.path.dentry->d_inode->i_mutex);
nfsd_sync_dir(rec_dir.path.dentry);
mutex_unlock(&rec_dir.path.dentry->d_inode->i_mutex);
}
int
@ -142,9 +142,9 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
nfs4_save_user(&uid, &gid);
/* lock the parent */
mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
mutex_lock(&rec_dir.path.dentry->d_inode->i_mutex);
dentry = lookup_one_len(dname, rec_dir.dentry, HEXDIR_LEN-1);
dentry = lookup_one_len(dname, rec_dir.path.dentry, HEXDIR_LEN-1);
if (IS_ERR(dentry)) {
status = PTR_ERR(dentry);
goto out_unlock;
@ -154,11 +154,11 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n");
goto out_put;
}
status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU);
status = vfs_mkdir(rec_dir.path.dentry->d_inode, dentry, S_IRWXU);
out_put:
dput(dentry);
out_unlock:
mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
mutex_unlock(&rec_dir.path.dentry->d_inode->i_mutex);
if (status == 0) {
clp->cl_firststate = 1;
nfsd4_sync_rec_dir();
@ -221,7 +221,7 @@ nfsd4_list_rec_dir(struct dentry *dir, recdir_func *f)
nfs4_save_user(&uid, &gid);
filp = dentry_open(dget(dir), mntget(rec_dir.mnt), O_RDONLY);
filp = dentry_open(dget(dir), mntget(rec_dir.path.mnt), O_RDONLY);
status = PTR_ERR(filp);
if (IS_ERR(filp))
goto out;
@ -286,9 +286,9 @@ nfsd4_unlink_clid_dir(char *name, int namlen)
dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);
mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
dentry = lookup_one_len(name, rec_dir.dentry, namlen);
mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
mutex_lock(&rec_dir.path.dentry->d_inode->i_mutex);
dentry = lookup_one_len(name, rec_dir.path.dentry, namlen);
mutex_unlock(&rec_dir.path.dentry->d_inode->i_mutex);
if (IS_ERR(dentry)) {
status = PTR_ERR(dentry);
return status;
@ -297,7 +297,7 @@ nfsd4_unlink_clid_dir(char *name, int namlen)
if (!dentry->d_inode)
goto out;
status = nfsd4_clear_clid_dir(rec_dir.dentry, dentry);
status = nfsd4_clear_clid_dir(rec_dir.path.dentry, dentry);
out:
dput(dentry);
return status;
@ -347,12 +347,12 @@ nfsd4_recdir_purge_old(void) {
if (!rec_dir_init)
return;
status = nfsd4_list_rec_dir(rec_dir.dentry, purge_old);
status = nfsd4_list_rec_dir(rec_dir.path.dentry, purge_old);
if (status == 0)
nfsd4_sync_rec_dir();
if (status)
printk("nfsd4: failed to purge old clients from recovery"
" directory %s\n", rec_dir.dentry->d_name.name);
" directory %s\n", rec_dir.path.dentry->d_name.name);
return;
}
@ -373,10 +373,10 @@ int
nfsd4_recdir_load(void) {
int status;
status = nfsd4_list_rec_dir(rec_dir.dentry, load_recdir);
status = nfsd4_list_rec_dir(rec_dir.path.dentry, load_recdir);
if (status)
printk("nfsd4: failed loading clients from recovery"
" directory %s\n", rec_dir.dentry->d_name.name);
" directory %s\n", rec_dir.path.dentry->d_name.name);
return status;
}

2
fs/nfsd/nfs4state.c
View file

@ -3261,7 +3261,7 @@ nfs4_reset_recoverydir(char *recdir)
if (status)
return status;
status = -ENOTDIR;
if (S_ISDIR(nd.dentry->d_inode->i_mode)) {
if (S_ISDIR(nd.path.dentry->d_inode->i_mode)) {
nfs4_set_recdir(recdir);
status = 0;
}

31
fs/open.c
View file

@ -127,7 +127,7 @@ asmlinkage long sys_statfs(const char __user * path, struct statfs __user * buf)
error = user_path_walk(path, &nd);
if (!error) {
struct statfs tmp;
error = vfs_statfs_native(nd.dentry, &tmp);
error = vfs_statfs_native(nd.path.dentry, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
path_release(&nd);
@ -146,7 +146,7 @@ asmlinkage long sys_statfs64(const char __user *path, size_t sz, struct statfs64
error = user_path_walk(path, &nd);
if (!error) {
struct statfs64 tmp;
error = vfs_statfs64(nd.dentry, &tmp);
error = vfs_statfs64(nd.path.dentry, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
path_release(&nd);
@ -233,7 +233,7 @@ static long do_sys_truncate(const char __user * path, loff_t length)
error = user_path_walk(path, &nd);
if (error)
goto out;
inode = nd.dentry->d_inode;
inode = nd.path.dentry->d_inode;
/* For directories it's -EISDIR, for other non-regulars - -EINVAL */
error = -EISDIR;
@ -271,7 +271,7 @@ static long do_sys_truncate(const char __user * path, loff_t length)
error = locks_verify_truncate(inode, NULL, length);
if (!error) {
DQUOT_INIT(inode);
error = do_truncate(nd.dentry, length, 0, NULL);
error = do_truncate(nd.path.dentry, length, 0, NULL);
}
put_write_and_out:
@ -455,10 +455,10 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
res = vfs_permission(&nd, mode);
/* SuS v2 requires we report a read only fs too */
if(res || !(mode & S_IWOTH) ||
special_file(nd.dentry->d_inode->i_mode))
special_file(nd.path.dentry->d_inode->i_mode))
goto out_path_release;
if(IS_RDONLY(nd.dentry->d_inode))
if(IS_RDONLY(nd.path.dentry->d_inode))
res = -EROFS;
out_path_release:
@ -490,7 +490,7 @@ asmlinkage long sys_chdir(const char __user * filename)
if (error)
goto dput_and_out;
set_fs_pwd(current->fs, nd.mnt, nd.dentry);
set_fs_pwd(current->fs, nd.path.mnt, nd.path.dentry);
dput_and_out:
path_release(&nd);
@ -545,7 +545,7 @@ asmlinkage long sys_chroot(const char __user * filename)
if (!capable(CAP_SYS_CHROOT))
goto dput_and_out;
set_fs_root(current->fs, nd.mnt, nd.dentry);
set_fs_root(current->fs, nd.path.mnt, nd.path.dentry);
set_fs_altroot();
error = 0;
dput_and_out:
@ -602,7 +602,7 @@ asmlinkage long sys_fchmodat(int dfd, const char __user *filename,
error = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW, &nd);
if (error)
goto out;
inode = nd.dentry->d_inode;
inode = nd.path.dentry->d_inode;
error = -EROFS;
if (IS_RDONLY(inode))
@ -617,7 +617,7 @@ asmlinkage long sys_fchmodat(int dfd, const char __user *filename,
mode = inode->i_mode;
newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
error = notify_change(nd.dentry, &newattrs);
error = notify_change(nd.path.dentry, &newattrs);
mutex_unlock(&inode->i_mutex);
dput_and_out:
@ -675,7 +675,7 @@ asmlinkage long sys_chown(const char __user * filename, uid_t user, gid_t group)
error = user_path_walk(filename, &nd);
if (error)
goto out;
error = chown_common(nd.dentry, user, group);
error = chown_common(nd.path.dentry, user, group);
path_release(&nd);
out:
return error;
@ -695,7 +695,7 @@ asmlinkage long sys_fchownat(int dfd, const char __user *filename, uid_t user,
error = __user_walk_fd(dfd, filename, follow, &nd);
if (error)
goto out;
error = chown_common(nd.dentry, user, group);
error = chown_common(nd.path.dentry, user, group);
path_release(&nd);
out:
return error;
@ -709,7 +709,7 @@ asmlinkage long sys_lchown(const char __user * filename, uid_t user, gid_t group
error = user_path_walk_link(filename, &nd);
if (error)
goto out;
error = chown_common(nd.dentry, user, group);
error = chown_common(nd.path.dentry, user, group);
path_release(&nd);
out:
return error;
@ -863,7 +863,7 @@ struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry
goto out;
if (IS_ERR(dentry))
goto out_err;
nd->intent.open.file = __dentry_open(dget(dentry), mntget(nd->mnt),
nd->intent.open.file = __dentry_open(dget(dentry), mntget(nd->path.mnt),
nd->intent.open.flags - 1,
nd->intent.open.file,
open);
@ -891,7 +891,8 @@ struct file *nameidata_to_filp(struct nameidata *nd, int flags)
filp = nd->intent.open.file;
/* Has the filesystem initialised the file for us? */
if (filp->f_path.dentry == NULL)
filp = __dentry_open(nd->dentry, nd->mnt, flags, filp, NULL);
filp = __dentry_open(nd->path.dentry, nd->path.mnt, flags, filp,
NULL);
else
path_release(nd);
return filp;

3
fs/proc/base.c
View file

@ -1170,7 +1170,8 @@ static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
if (!proc_fd_access_allowed(inode))
goto out;
error = PROC_I(inode)->op.proc_get_link(inode, &nd->dentry, &nd->mnt);
error = PROC_I(inode)->op.proc_get_link(inode, &nd->path.dentry,
&nd->path.mnt);
nd->last_type = LAST_BIND;
out:
return ERR_PTR(error);

2
fs/proc/proc_sysctl.c
View file

@ -407,7 +407,7 @@ static int proc_sys_permission(struct inode *inode, int mask, struct nameidata *
if (!nd || !depth)
goto out;
dentry = nd->dentry;
dentry = nd->path.dentry;
table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
/* If the entry does not exist deny permission */

6
fs/reiserfs/super.c
View file

@ -2026,12 +2026,12 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
if (err)
return err;
/* Quotafile not on the same filesystem? */
if (nd.mnt->mnt_sb != sb) {
if (nd.path.mnt->mnt_sb != sb) {
path_release(&nd);
return -EXDEV;
}
/* We must not pack tails for quota files on reiserfs for quota IO to work */
if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
if (!REISERFS_I(nd.path.dentry->d_inode)->i_flags & i_nopack_mask) {
reiserfs_warning(sb,
"reiserfs: Quota file must have tail packing disabled.");
path_release(&nd);
@ -2044,7 +2044,7 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
return vfs_quota_on(sb, type, format_id, path);
}
/* Quotafile not of fs root? */
if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
reiserfs_warning(sb,
"reiserfs: Quota file not on filesystem root. "
"Journalled quota will not work.");

13
fs/stat.c
View file

@ -62,7 +62,7 @@ int vfs_stat_fd(int dfd, char __user *name, struct kstat *stat)
error = __user_walk_fd(dfd, name, LOOKUP_FOLLOW, &nd);
if (!error) {
error = vfs_getattr(nd.mnt, nd.dentry, stat);
error = vfs_getattr(nd.path.mnt, nd.path.dentry, stat);
path_release(&nd);
}
return error;
@ -82,7 +82,7 @@ int vfs_lstat_fd(int dfd, char __user *name, struct kstat *stat)
error = __user_walk_fd(dfd, name, 0, &nd);
if (!error) {
error = vfs_getattr(nd.mnt, nd.dentry, stat);
error = vfs_getattr(nd.path.mnt, nd.path.dentry, stat);
path_release(&nd);
}
return error;
@ -302,14 +302,15 @@ asmlinkage long sys_readlinkat(int dfd, const char __user *path,
error = __user_walk_fd(dfd, path, 0, &nd);
if (!error) {
struct inode * inode = nd.dentry->d_inode;
struct inode *inode = nd.path.dentry->d_inode;
error = -EINVAL;
if (inode->i_op && inode->i_op->readlink) {
error = security_inode_readlink(nd.dentry);
error = security_inode_readlink(nd.path.dentry);
if (!error) {
touch_atime(nd.mnt, nd.dentry);
error = inode->i_op->readlink(nd.dentry, buf, bufsiz);
touch_atime(nd.path.mnt, nd.path.dentry);
error = inode->i_op->readlink(nd.path.dentry,
buf, bufsiz);
}
}
path_release(&nd);

2
fs/utimes.c
View file

@ -84,7 +84,7 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
if (error)
goto out;
dentry = nd.dentry;
dentry = nd.path.dentry;
}
inode = dentry->d_inode;

16
fs/xattr.c
View file

@ -262,7 +262,7 @@ sys_setxattr(char __user *path, char __user *name, void __user *value,
error = user_path_walk(path, &nd);
if (error)
return error;
error = setxattr(nd.dentry, name, value, size, flags);
error = setxattr(nd.path.dentry, name, value, size, flags);
path_release(&nd);
return error;
}
@ -277,7 +277,7 @@ sys_lsetxattr(char __user *path, char __user *name, void __user *value,
error = user_path_walk_link(path, &nd);
if (error)
return error;
error = setxattr(nd.dentry, name, value, size, flags);
error = setxattr(nd.path.dentry, name, value, size, flags);
path_release(&nd);
return error;
}
@ -347,7 +347,7 @@ sys_getxattr(char __user *path, char __user *name, void __user *value,
error = user_path_walk(path, &nd);
if (error)
return error;
error = getxattr(nd.dentry, name, value, size);
error = getxattr(nd.path.dentry, name, value, size);
path_release(&nd);
return error;
}
@ -362,7 +362,7 @@ sys_lgetxattr(char __user *path, char __user *name, void __user *value,
error = user_path_walk_link(path, &nd);
if (error)
return error;
error = getxattr(nd.dentry, name, value, size);
error = getxattr(nd.path.dentry, name, value, size);
path_release(&nd);
return error;
}
@ -421,7 +421,7 @@ sys_listxattr(char __user *path, char __user *list, size_t size)
error = user_path_walk(path, &nd);
if (error)
return error;
error = listxattr(nd.dentry, list, size);
error = listxattr(nd.path.dentry, list, size);
path_release(&nd);
return error;
}
@ -435,7 +435,7 @@ sys_llistxattr(char __user *path, char __user *list, size_t size)
error = user_path_walk_link(path, &nd);
if (error)
return error;
error = listxattr(nd.dentry, list, size);
error = listxattr(nd.path.dentry, list, size);
path_release(&nd);
return error;
}
@ -482,7 +482,7 @@ sys_removexattr(char __user *path, char __user *name)
error = user_path_walk(path, &nd);
if (error)
return error;
error = removexattr(nd.dentry, name);
error = removexattr(nd.path.dentry, name);
path_release(&nd);
return error;
}
@ -496,7 +496,7 @@ sys_lremovexattr(char __user *path, char __user *name)
error = user_path_walk_link(path, &nd);
if (error)
return error;
error = removexattr(nd.dentry, name);
error = removexattr(nd.path.dentry, name);
path_release(&nd);
return error;
}

6
fs/xfs/linux-2.6/xfs_ioctl.c
View file

@ -91,9 +91,9 @@ xfs_find_handle(
if (error)
return error;
ASSERT(nd.dentry);
ASSERT(nd.dentry->d_inode);
inode = igrab(nd.dentry->d_inode);
ASSERT(nd.path.dentry);
ASSERT(nd.path.dentry->d_inode);
inode = igrab(nd.path.dentry->d_inode);
path_release(&nd);
break;
}

3
include/linux/namei.h
View file

@ -16,8 +16,7 @@ struct open_intent {
enum { MAX_NESTED_LINKS = 8 };
struct nameidata {
struct dentry *dentry;
struct vfsmount *mnt;
struct path path;
struct qstr last;
unsigned int flags;
int last_type;

16
kernel/audit_tree.c
View file

@ -549,7 +549,7 @@ void audit_trim_trees(void)
if (err)
goto skip_it;
root_mnt = collect_mounts(nd.mnt, nd.dentry);
root_mnt = collect_mounts(nd.path.mnt, nd.path.dentry);
path_release(&nd);
if (!root_mnt)
goto skip_it;
@ -583,17 +583,17 @@ skip_it:
static int is_under(struct vfsmount *mnt, struct dentry *dentry,
struct nameidata *nd)
{
if (mnt != nd->mnt) {
if (mnt != nd->path.mnt) {
for (;;) {
if (mnt->mnt_parent == mnt)
return 0;
if (mnt->mnt_parent == nd->mnt)
if (mnt->mnt_parent == nd->path.mnt)
break;
mnt = mnt->mnt_parent;
}
dentry = mnt->mnt_mountpoint;
}
return is_subdir(dentry, nd->dentry);
return is_subdir(dentry, nd->path.dentry);
}
int audit_make_tree(struct audit_krule *rule, char *pathname, u32 op)
@ -641,7 +641,7 @@ int audit_add_tree_rule(struct audit_krule *rule)
err = path_lookup(tree->pathname, 0, &nd);
if (err)
goto Err;
mnt = collect_mounts(nd.mnt, nd.dentry);
mnt = collect_mounts(nd.path.mnt, nd.path.dentry);
path_release(&nd);
if (!mnt) {
err = -ENOMEM;
@ -701,7 +701,7 @@ int audit_tag_tree(char *old, char *new)
err = path_lookup(new, 0, &nd);
if (err)
return err;
tagged = collect_mounts(nd.mnt, nd.dentry);
tagged = collect_mounts(nd.path.mnt, nd.path.dentry);
path_release(&nd);
if (!tagged)
return -ENOMEM;
@ -711,8 +711,8 @@ int audit_tag_tree(char *old, char *new)
drop_collected_mounts(tagged);
return err;
}
mnt = mntget(nd.mnt);
dentry = dget(nd.dentry);
mnt = mntget(nd.path.mnt);
dentry = dget(nd.path.dentry);
path_release(&nd);
if (dentry == tagged->mnt_root && dentry == mnt->mnt_root)

11
kernel/auditfilter.c
View file

@ -169,8 +169,8 @@ static struct audit_parent *audit_init_parent(struct nameidata *ndp)
inotify_init_watch(&parent->wdata);
/* grab a ref so inotify watch hangs around until we take audit_filter_mutex */
get_inotify_watch(&parent->wdata);
wd = inotify_add_watch(audit_ih, &parent->wdata, ndp->dentry->d_inode,
AUDIT_IN_WATCH);
wd = inotify_add_watch(audit_ih, &parent->wdata,
ndp->path.dentry->d_inode, AUDIT_IN_WATCH);
if (wd < 0) {
audit_free_parent(&parent->wdata);
return ERR_PTR(wd);
@ -1214,8 +1214,8 @@ static int audit_add_watch(struct audit_krule *krule, struct nameidata *ndp,
/* update watch filter fields */
if (ndw) {
watch->dev = ndw->dentry->d_inode->i_sb->s_dev;
watch->ino = ndw->dentry->d_inode->i_ino;
watch->dev = ndw->path.dentry->d_inode->i_sb->s_dev;
watch->ino = ndw->path.dentry->d_inode->i_ino;
}
/* The audit_filter_mutex must not be held during inotify calls because
@ -1225,7 +1225,8 @@ static int audit_add_watch(struct audit_krule *krule, struct nameidata *ndp,
*/
mutex_unlock(&audit_filter_mutex);
if (inotify_find_watch(audit_ih, ndp->dentry->d_inode, &i_watch) < 0) {
if (inotify_find_watch(audit_ih, ndp->path.dentry->d_inode,
&i_watch) < 0) {
parent = audit_init_parent(ndp);
if (IS_ERR(parent)) {
/* caller expects mutex locked */

5
net/sunrpc/rpc_pipe.c
View file

@ -668,7 +668,8 @@ rpc_lookup_negative(char *path, struct nameidata *nd)
if ((error = rpc_lookup_parent(path, nd)) != 0)
return ERR_PTR(error);
dentry = rpc_lookup_create(nd->dentry, nd->last.name, nd->last.len, 1);
dentry = rpc_lookup_create(nd->path.dentry, nd->last.name, nd->last.len,
1);
if (IS_ERR(dentry))
rpc_release_path(nd);
return dentry;
@ -695,7 +696,7 @@ rpc_mkdir(char *path, struct rpc_clnt *rpc_client)
dentry = rpc_lookup_negative(path, &nd);
if (IS_ERR(dentry))
return dentry;
dir = nd.dentry->d_inode;
dir = nd.path.dentry->d_inode;
if ((error = __rpc_mkdir(dir, dentry)) != 0)
goto err_dput;
RPC_I(dentry->d_inode)->private = rpc_client;

20
net/unix/af_unix.c
View file

@ -718,14 +718,14 @@ static struct sock *unix_find_other(struct net *net,
goto put_fail;
err = -ECONNREFUSED;
if (!S_ISSOCK(nd.dentry->d_inode->i_mode))
if (!S_ISSOCK(nd.path.dentry->d_inode->i_mode))
goto put_fail;
u=unix_find_socket_byinode(net, nd.dentry->d_inode);
u = unix_find_socket_byinode(net, nd.path.dentry->d_inode);
if (!u)
goto put_fail;
if (u->sk_type == type)
touch_atime(nd.mnt, nd.dentry);
touch_atime(nd.path.mnt, nd.path.dentry);
path_release(&nd);
@ -819,12 +819,12 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
*/
mode = S_IFSOCK |
(SOCK_INODE(sock)->i_mode & ~current->fs->umask);
err = vfs_mknod(nd.dentry->d_inode, dentry, mode, 0);
err = vfs_mknod(nd.path.dentry->d_inode, dentry, mode, 0);
if (err)
goto out_mknod_dput;
mutex_unlock(&nd.dentry->d_inode->i_mutex);
dput(nd.dentry);
nd.dentry = dentry;
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
dput(nd.path.dentry);
nd.path.dentry = dentry;
addr->hash = UNIX_HASH_SIZE;
}
@ -842,8 +842,8 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
list = &unix_socket_table[addr->hash];
} else {
list = &unix_socket_table[dentry->d_inode->i_ino & (UNIX_HASH_SIZE-1)];
u->dentry = nd.dentry;
u->mnt = nd.mnt;
u->dentry = nd.path.dentry;
u->mnt = nd.path.mnt;
}
err = 0;
@ -861,7 +861,7 @@ out:
out_mknod_dput:
dput(dentry);
out_mknod_unlock:
mutex_unlock(&nd.dentry->d_inode->i_mutex);
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_release(&nd);
out_mknod_parent:
if (err==-EEXIST)

4
security/selinux/hooks.c
View file

@ -2341,10 +2341,10 @@ static int selinux_mount(char * dev_name,
return rc;
if (flags & MS_REMOUNT)
return superblock_has_perm(current, nd->mnt->mnt_sb,
return superblock_has_perm(current, nd->path.mnt->mnt_sb,
FILESYSTEM__REMOUNT, NULL);
else
return dentry_has_perm(current, nd->mnt, nd->dentry,
return dentry_has_perm(current, nd->path.mnt, nd->path.dentry,
FILE__MOUNTON);
}

2
security/smack/smack_lsm.c
View file

@ -325,7 +325,7 @@ static int smack_sb_statfs(struct dentry *dentry)
static int smack_sb_mount(char *dev_name, struct nameidata *nd,
char *type, unsigned long flags, void *data)
{
struct superblock_smack *sbp = nd->mnt->mnt_sb->s_security;
struct superblock_smack *sbp = nd->path.mnt->mnt_sb->s_security;
return smk_curacc(sbp->smk_floor, MAY_WRITE);
}