diff options
| -rw-r--r-- | fs/namei.c | 37 | ||||
| -rw-r--r-- | include/linux/list_bl.h | 2 | ||||
| -rw-r--r-- | kernel/cgroup.c | 2 |
3 files changed, 21 insertions, 20 deletions
@@ -779,7 +779,8 @@ static void path_put_conditional(struct path *path, struct nameidata *nd) mntput(path->mnt); } -static inline void path_to_nameidata(struct path *path, struct nameidata *nd) +static inline void path_to_nameidata(const struct path *path, + struct nameidata *nd) { if (!(nd->flags & LOOKUP_RCU)) { dput(nd->path.dentry); @@ -791,20 +792,20 @@ static inline void path_to_nameidata(struct path *path, struct nameidata *nd) } static __always_inline int -__do_follow_link(struct path *path, struct nameidata *nd, void **p) +__do_follow_link(const struct path *link, struct nameidata *nd, void **p) { int error; - struct dentry *dentry = path->dentry; + struct dentry *dentry = link->dentry; - touch_atime(path->mnt, dentry); + touch_atime(link->mnt, dentry); nd_set_link(nd, NULL); - if (path->mnt != nd->path.mnt) { - path_to_nameidata(path, nd); + if (link->mnt != nd->path.mnt) { + path_to_nameidata(link, nd); nd->inode = nd->path.dentry->d_inode; dget(dentry); } - mntget(path->mnt); + mntget(link->mnt); nd->last_type = LAST_BIND; *p = dentry->d_inode->i_op->follow_link(dentry, nd); @@ -2348,11 +2349,12 @@ reval: nd.flags = flags; filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname); while (unlikely(!filp)) { /* trailing symlink */ - struct path holder; + struct path link = path; + struct inode *linki = link.dentry->d_inode; void *cookie; error = -ELOOP; /* S_ISDIR part is a temporary automount kludge */ - if (!(nd.flags & LOOKUP_FOLLOW) && !S_ISDIR(nd.inode->i_mode)) + if (!(nd.flags & LOOKUP_FOLLOW) && !S_ISDIR(linki->i_mode)) goto exit_dput; if (count++ == 32) goto exit_dput; @@ -2368,23 +2370,22 @@ reval: * just set LAST_BIND. */ nd.flags |= LOOKUP_PARENT; - error = security_inode_follow_link(path.dentry, &nd); + error = security_inode_follow_link(link.dentry, &nd); if (error) goto exit_dput; - error = __do_follow_link(&path, &nd, &cookie); + error = __do_follow_link(&link, &nd, &cookie); if (unlikely(error)) { - if (!IS_ERR(cookie) && nd.inode->i_op->put_link) - nd.inode->i_op->put_link(path.dentry, &nd, cookie); + if (!IS_ERR(cookie) && linki->i_op->put_link) + linki->i_op->put_link(link.dentry, &nd, cookie); /* nd.path had been dropped */ - nd.path = path; + nd.path = link; goto out_path; } - holder = path; nd.flags &= ~LOOKUP_PARENT; filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname); - if (nd.inode->i_op->put_link) - nd.inode->i_op->put_link(holder.dentry, &nd, cookie); - path_put(&holder); + if (linki->i_op->put_link) + linki->i_op->put_link(link.dentry, &nd, cookie); + path_put(&link); } out: if (nd.root.mnt) diff --git a/include/linux/list_bl.h b/include/linux/list_bl.h index b2adbb4..5bad17d 100644 --- a/include/linux/list_bl.h +++ b/include/linux/list_bl.h @@ -16,7 +16,7 @@ * some fast and compact auxiliary data. */ -#if defined(CONFIG_SMP) +#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) #define LIST_BL_LOCKMASK 1UL #else #define LIST_BL_LOCKMASK 0UL diff --git a/kernel/cgroup.c b/kernel/cgroup.c index ffb7bba..b24d702 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -916,7 +916,7 @@ static void cgroup_d_remove_dir(struct dentry *dentry) parent = dentry->d_parent; spin_lock(&parent->d_lock); - spin_lock(&dentry->d_lock); + spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); list_del_init(&dentry->d_u.d_child); spin_unlock(&dentry->d_lock); spin_unlock(&parent->d_lock); |