lkml.org 
[lkml]   [2007]   [Sep]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5/5] Make wait_on_retry_sync_kiocb killable
Date
Use TASK_KILLABLE to allow wait_on_retry_sync_kiocb to return -EINTR.
All callers then check the return value and break out of their loops.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
---
fs/read_write.c | 17 ++++++++++++-----
1 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/fs/read_write.c b/fs/read_write.c
index 507ddff..b1a52d5 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -218,14 +218,15 @@ Einval:
return -EINVAL;
}

-static void wait_on_retry_sync_kiocb(struct kiocb *iocb)
+static int wait_on_retry_sync_kiocb(struct kiocb *iocb)
{
- set_current_state(TASK_UNINTERRUPTIBLE);
+ set_current_state(TASK_KILLABLE);
if (!kiocbIsKicked(iocb))
schedule();
else
kiocbClearKicked(iocb);
__set_current_state(TASK_RUNNING);
+ return fatal_signal_pending(current) ? -EINTR : 0;
}

ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
@@ -242,7 +243,9 @@ ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *pp
ret = filp->f_op->aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
if (ret != -EIOCBRETRY)
break;
- wait_on_retry_sync_kiocb(&kiocb);
+ ret = wait_on_retry_sync_kiocb(&kiocb);
+ if (ret)
+ break;
}

if (-EIOCBQUEUED == ret)
@@ -300,7 +303,9 @@ ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, lof
ret = filp->f_op->aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
if (ret != -EIOCBRETRY)
break;
- wait_on_retry_sync_kiocb(&kiocb);
+ ret = wait_on_retry_sync_kiocb(&kiocb);
+ if (ret)
+ break;
}

if (-EIOCBQUEUED == ret)
@@ -466,7 +471,9 @@ ssize_t do_sync_readv_writev(struct file *filp, const struct iovec *iov,
ret = fn(&kiocb, iov, nr_segs, kiocb.ki_pos);
if (ret != -EIOCBRETRY)
break;
- wait_on_retry_sync_kiocb(&kiocb);
+ ret = wait_on_retry_sync_kiocb(&kiocb);
+ if (ret)
+ break;
}

if (ret == -EIOCBQUEUED)
--
1.4.4.2
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-09-02 04:51    [W:0.185 / U:0.128 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site