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authorAl Viro <viro@zeniv.linux.org.uk>2018-05-03 16:45:06 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2018-05-26 21:20:50 +0300
commit888e2b03ef56694290e58bd9ac23f8033bf6369f (patch)
tree71b2bfef0e1a8c09b47ceac8d1f94411499e5c94 /fs/proc
parent0168b9e38c4213e162b15444c071d4198ff470e8 (diff)
downloadlinux-888e2b03ef56694290e58bd9ac23f8033bf6369f.tar.xz
switch the rest of procfs lookups to d_splice_alias()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/generic.c3
-rw-r--r--fs/proc/proc_sysctl.c15
2 files changed, 13 insertions, 5 deletions
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 2078e70e1595..b77034a694ef 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -256,8 +256,7 @@ struct dentry *proc_lookup_de(struct inode *dir, struct dentry *dentry,
if (!inode)
return ERR_PTR(-ENOMEM);
d_set_d_op(dentry, &proc_misc_dentry_ops);
- d_add(dentry, inode);
- return NULL;
+ return d_splice_alias(inode, dentry);
}
read_unlock(&proc_subdir_lock);
return ERR_PTR(-ENOENT);
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 8989936f2995..4d765e5e91ed 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -554,9 +554,8 @@ static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
if (!inode)
goto out;
- err = NULL;
d_set_d_op(dentry, &proc_sys_dentry_operations);
- d_add(dentry, inode);
+ err = d_splice_alias(inode, dentry);
out:
if (h)
@@ -684,6 +683,7 @@ static bool proc_sys_fill_cache(struct file *file,
if (IS_ERR(child))
return false;
if (d_in_lookup(child)) {
+ struct dentry *res;
inode = proc_sys_make_inode(dir->d_sb, head, table);
if (!inode) {
d_lookup_done(child);
@@ -691,7 +691,16 @@ static bool proc_sys_fill_cache(struct file *file,
return false;
}
d_set_d_op(child, &proc_sys_dentry_operations);
- d_add(child, inode);
+ res = d_splice_alias(inode, child);
+ d_lookup_done(child);
+ if (unlikely(res)) {
+ if (IS_ERR(res)) {
+ dput(child);
+ return false;
+ }
+ dput(child);
+ child = res;
+ }
}
}
inode = d_inode(child);