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new helper: done_path_create()

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releases what needs to be released after {kern,user}_path_create()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-07-20 01:15:31 +04:00
parent 25b2692a8a
commit 921a1650de
6 changed files with 21 additions and 30 deletions
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24
fs/namei.c
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@@ -2893,6 +2893,14 @@ out:
}
EXPORT_SYMBOL(kern_path_create);
void done_path_create(struct path *path, struct dentry *dentry)
{
dput(dentry);
mutex_unlock(&path->dentry->d_inode->i_mutex);
path_put(path);
}
EXPORT_SYMBOL(done_path_create);
struct dentry *user_path_create(int dfd, const char __user *pathname, struct path *path, int is_dir)
{
char *tmp = getname(pathname);
@@ -2989,9 +2997,7 @@ SYSCALL_DEFINE4(mknodat, int, dfd, const char __user *, filename, umode_t, mode,
out_drop_write:
mnt_drop_write(path.mnt);
out_dput:
dput(dentry);
mutex_unlock(&path.dentry->d_inode->i_mutex);
path_put(&path);
done_path_create(&path, dentry);
return error;
}
@@ -3048,9 +3054,7 @@ SYSCALL_DEFINE3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode)
out_drop_write:
mnt_drop_write(path.mnt);
out_dput:
dput(dentry);
mutex_unlock(&path.dentry->d_inode->i_mutex);
path_put(&path);
done_path_create(&path, dentry);
return error;
}
@@ -3334,9 +3338,7 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
out_drop_write:
mnt_drop_write(path.mnt);
out_dput:
dput(dentry);
mutex_unlock(&path.dentry->d_inode->i_mutex);
path_put(&path);
done_path_create(&path, dentry);
out_putname:
putname(from);
return error;
@@ -3446,9 +3448,7 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
out_drop_write:
mnt_drop_write(new_path.mnt);
out_dput:
dput(new_dentry);
mutex_unlock(&new_path.dentry->d_inode->i_mutex);
path_put(&new_path);
done_path_create(&new_path, new_dentry);
out:
path_put(&old_path);