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pull mnt_want_write()/mnt_drop_write() into kern_path_create()/done_path_create() resp.

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One side effect - attempt to create a cross-device link on a read-only fs fails
with EROFS instead of EXDEV now.  Makes more sense, POSIX allows, etc.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-07-20 02:25:00 +04:00
parent 8e4bfca1d1
commit a8104a9fcd
3 changed files with 18 additions and 50 deletions
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4
net/unix/af_unix.c
View file

@ -876,15 +876,11 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
*/
mode = S_IFSOCK |
(SOCK_INODE(sock)->i_mode & ~current_umask());
err = mnt_want_write(path.mnt);
if (err)
goto out_mknod_dput;
err = security_path_mknod(&path, dentry, mode, 0);
if (err)
goto out_mknod_drop_write;
err = vfs_mknod(path.dentry->d_inode, dentry, mode, 0);
out_mknod_drop_write:
mnt_drop_write(path.mnt);
if (err)
goto out_mknod_dput;
mntget(path.mnt);