From: David Chow <davidchow@rcn.com.hk>
To: linux-kernel@vger.kernel.org
Subject: EFAULT from file read.
Date: Tue, 18 Sep 2001 17:16:31 +0800 [thread overview]
Message-ID: <3BA710EF.FC38A28B@rcn.com.hk> (raw)
Dear all,
I am having trouble in reading a file in the kernel space using the
file->f_op->read call, everything is ok. I start off file->f_pos = 0 . I
also did a mntget to the super block before I call
"file=dentry_open(.....)" . I intend to open the file in read only mode.
What can be wrong? I have also check the inode->i_size is large enough
for me to just read 8 bytes from the file. I keep having EFAULT error
from the read call... also before calling mntget, also did a dget to the
dentry. Any help is welcomed. Thanks.
regards,
David Chow
next reply other threads:[~2001-09-18 9:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-18 9:16 David Chow [this message]
2001-09-18 12:53 ` EFAULT from file read Richard B. Johnson
2001-09-18 13:04 ` Alexander Viro
2001-09-19 10:24 ` David Chow
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3BA710EF.FC38A28B@rcn.com.hk \
--to=davidchow@rcn.com.hk \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.