tree 6a70d404272adb8dcdc48f3323f3faa397be9026
parent cee9e53f59fe1842a7d26fa1e76382fb6ed21048
author Michael Holzheu <holzheu@de.ibm.com> 1187783503 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1187783509 +0200

[S390] hypfs: inode corruption due to missing locking

hypfs removes the whole hypfs directory tree and creates a new one, when a
process triggers an update by writing to the "update" attribute. When removing
and creating files, it is necessary to lock the inode of the parent directory
where the files live. Currently hypfs does not lock the parent inode, which
can lead to inode corruption. This patch:
 * Introduces correct locking
 * Fixes i_nlink reference counting for inodes, when creating directories
 * Adds info printk, when hypfs filesystem has been mounted

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>