renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-29 15:43:59 +08:00
Code

staging: lustre: mdt: fail FMODE_WRITE open if the client is read only

Browse Source 
O_WRONLY/O_RDWR open on a file will get EROFS on a read only client,
but the rpc gets sent to the mdt anyway.
mdt will increase the mot_write_count of the mdt object, blocking
subsequent FMODE_EXEC open to the same file.

This patch makes sure we fail the FMODE_WRITE open with EROFS on the
client straight away without sending the rpc to mdt.

Signed-off-by: Li Dongyang <dongyang.li@anu.edu.au>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7727
Reviewed-on: http://review.whamcloud.com/18242
Reviewed-by: Ian Costello <icostello@ddn.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Yang Sheng <yang.sheng@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Li Dongyang 2016-12-02 19:53:18 -05:00 committed by Greg Kroah-Hartman
parent 2ba88d4e10
commit b4f840c15a
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/staging/lustre/lustre/llite/namei.c
View File

@ -572,6 +572,10 @@ static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
}
}
if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
dentry->d_sb->s_flags & MS_RDONLY)
return ERR_PTR(-EROFS);
if (it->it_op & IT_CREAT)
opc = LUSTRE_OPC_CREATE;
else