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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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4
arch/powerpc/platforms/cell/spufs/syscalls.c
View File

@ -70,9 +70,7 @@ static long do_spu_create(const char __user *pathname, unsigned int flags,
ret = PTR_ERR(dentry);
if (!IS_ERR(dentry)) {
ret = spufs_create(&path, dentry, flags, mode, neighbor);
mutex_unlock(&path.dentry->d_inode->i_mutex);
dput(dentry);
path_put(&path);
done_path_create(&path, dentry);
}
return ret;

9
drivers/base/devtmpfs.c
View File

@ -156,9 +156,7 @@ static int dev_mkdir(const char *name, umode_t mode)
if (!err)
/* mark as kernel-created inode */
dentry->d_inode->i_private = &thread;
dput(dentry);
mutex_unlock(&path.dentry->d_inode->i_mutex);
path_put(&path);
done_path_create(&path, dentry);
return err;
}
@ -218,10 +216,7 @@ static int handle_create(const char *nodename, umode_t mode, struct device *dev)
/* mark as kernel-created inode */
dentry->d_inode->i_private = &thread;
}
dput(dentry);
mutex_unlock(&path.dentry->d_inode->i_mutex);
path_put(&path);
done_path_create(&path, dentry);
return err;
}

24
fs/namei.c
View File

@ -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);

4
fs/ocfs2/refcounttree.c
View File

@ -4477,9 +4477,7 @@ int ocfs2_reflink_ioctl(struct inode *inode,
new_dentry, preserve);
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);

1
include/linux/namei.h
View File

@ -67,6 +67,7 @@ extern int kern_path(const char *, unsigned, struct path *);
extern struct dentry *kern_path_create(int, const char *, struct path *, int);
extern struct dentry *user_path_create(int, const char __user *, struct path *, int);
extern void done_path_create(struct path *, struct dentry *);
extern struct dentry *kern_path_locked(const char *, struct path *);
extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
const char *, unsigned int, struct path *);

9
net/unix/af_unix.c
View File

@ -887,8 +887,9 @@ out_mknod_drop_write:
mnt_drop_write(path.mnt);
if (err)
goto out_mknod_dput;
mutex_unlock(&path.dentry->d_inode->i_mutex);
dput(path.dentry);
mntget(path.mnt);
dget(dentry);
done_path_create(&path, dentry);
path.dentry = dentry;
addr->hash = UNIX_HASH_SIZE;
@ -923,9 +924,7 @@ out:
return err;
out_mknod_dput:
dput(dentry);
mutex_unlock(&path.dentry->d_inode->i_mutex);
path_put(&path);
done_path_create(&path, dentry);
out_mknod_parent:
if (err == -EEXIST)
err = -EADDRINUSE;