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| author | Li Dongyang <dongyang.li@anu.edu.au> | 2016-12-02 19:53:18 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-12-06 10:47:55 +0100 |
| commit | b4f840c15ac78eb3d096eb3267776393b28c789f (patch) | |
| tree | d8980a6ff5d2f3e9d1a6af9f45b2aacd8c0f3e8e /drivers/staging | |
| parent | 2ba88d4e100d5b1441dfa9a5e03f665b8bc676bc (diff) | |
| download | linux-stable-b4f840c15ac78eb3d096eb3267776393b28c789f.tar.gz linux-stable-b4f840c15ac78eb3d096eb3267776393b28c789f.tar.bz2 linux-stable-b4f840c15ac78eb3d096eb3267776393b28c789f.zip | |
staging: lustre: mdt: fail FMODE_WRITE open if the client is read only
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>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/lustre/lustre/llite/namei.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c index b07079c4dda0..9426759aedc9 100644 --- a/drivers/staging/lustre/lustre/llite/namei.c +++ b/drivers/staging/lustre/lustre/llite/namei.c @@ -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 |