Commit 9ac9b847 authored by Dave Hansen's avatar Dave Hansen Committed by Al Viro

[PATCH] r/o bind mounts: write counts for truncate()

Acked-by: default avatarAl Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDave Hansen <haveblue@us.ibm.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 2af482a7
......@@ -244,21 +244,21 @@ static long do_sys_truncate(const char __user * path, loff_t length)
if (!S_ISREG(inode->i_mode))
goto dput_and_out;
error = vfs_permission(&nd, MAY_WRITE);
error = mnt_want_write(nd.path.mnt);
if (error)
goto dput_and_out;
error = -EROFS;
if (IS_RDONLY(inode))
goto dput_and_out;
error = vfs_permission(&nd, MAY_WRITE);
if (error)
goto mnt_drop_write_and_out;
error = -EPERM;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
goto dput_and_out;
goto mnt_drop_write_and_out;
error = get_write_access(inode);
if (error)
goto dput_and_out;
goto mnt_drop_write_and_out;
/*
* Make sure that there are no leases. get_write_access() protects
......@@ -276,6 +276,8 @@ static long do_sys_truncate(const char __user * path, loff_t length)
put_write_and_out:
put_write_access(inode);
mnt_drop_write_and_out:
mnt_drop_write(nd.path.mnt);
dput_and_out:
path_put(&nd.path);
out:
......
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