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authorAl Viro <viro@zeniv.linux.org.uk>2013-01-25 20:11:22 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2013-02-26 02:46:14 -0500
commitd3d009cb965eae7e002ea5badf603ea8f4c34915 (patch)
tree624a97e06717507d4246da2369b684d4ebd6e0a9
parent87e0aab37ff6c4284810a48d6034314fbf4eb319 (diff)
downloadop-kernel-dev-d3d009cb965eae7e002ea5badf603ea8f4c34915.zip
op-kernel-dev-d3d009cb965eae7e002ea5badf603ea8f4c34915.tar.gz
saner proc_get_inode() calling conventions
Make it drop the pde in *all* cases when no new reference to it is put into an inode - both when an inode had already been set up (as we were already doing) and when inode allocation has failed. Makes for simpler logics in callers... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/proc/generic.c21
-rw-r--r--fs/proc/inode.c10
2 files changed, 10 insertions, 21 deletions
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 7dfe548..2983dc5 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -412,8 +412,7 @@ static const struct dentry_operations proc_dentry_operations =
struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
struct dentry *dentry)
{
- struct inode *inode = NULL;
- int error = -ENOENT;
+ struct inode *inode;
spin_lock(&proc_subdir_lock);
for (de = de->subdir; de ; de = de->next) {
@@ -422,22 +421,16 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
pde_get(de);
spin_unlock(&proc_subdir_lock);
- error = -ENOMEM;
inode = proc_get_inode(dir->i_sb, de);
- goto out_unlock;
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ d_set_d_op(dentry, &proc_dentry_operations);
+ d_add(dentry, inode);
+ return NULL;
}
}
spin_unlock(&proc_subdir_lock);
-out_unlock:
-
- if (inode) {
- d_set_d_op(dentry, &proc_dentry_operations);
- d_add(dentry, inode);
- return NULL;
- }
- if (de)
- pde_put(de);
- return ERR_PTR(error);
+ return ERR_PTR(-ENOENT);
}
struct dentry *proc_lookup(struct inode *dir, struct dentry *dentry,
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 98a7d28..70322e1 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -445,12 +445,9 @@ static const struct file_operations proc_reg_file_ops_no_compat = {
struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
{
- struct inode * inode;
+ struct inode *inode = iget_locked(sb, de->low_ino);
- inode = iget_locked(sb, de->low_ino);
- if (!inode)
- return NULL;
- if (inode->i_state & I_NEW) {
+ if (inode && (inode->i_state & I_NEW)) {
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
PROC_I(inode)->pde = de;
@@ -482,7 +479,7 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
} else
pde_put(de);
return inode;
-}
+}
int proc_fill_super(struct super_block *s)
{
@@ -499,7 +496,6 @@ int proc_fill_super(struct super_block *s)
root_inode = proc_get_inode(s, &proc_root);
if (!root_inode) {
printk(KERN_ERR "proc_fill_super: get root inode failed\n");
- pde_put(&proc_root);
return -ENOMEM;
}
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