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ceph: make write_begin wait propagate ERESTARTSYS 

Currently, if the wait_event_interruptible is interrupted, we
return EAGAIN unconditionally and loop, such that we aren't, in
fact, interruptible.  So, propagate ERESTARTSYS if we get it.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2010-03-19 13:27:53 -07:00
parent ec4318bcb4
commit 8f883c24de
1 changed files with 8 additions and 2 deletions
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10
fs/ceph/addr.c
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@ -919,6 +919,10 @@ static int context_is_writeable_or_written(struct inode *inode,
/*
* We are only allowed to write into/dirty the page if the page is
* clean, or already dirty within the same snap context.
*
* called with page locked.
* return success with page locked,
* or any failure (incl -EAGAIN) with page unlocked.
*/
static int ceph_update_writeable_page(struct file *file,
loff_t pos, unsigned len,
@ -961,9 +965,11 @@ retry_locked:
snapc = ceph_get_snap_context((void *)page->private);
unlock_page(page);
ceph_queue_writeback(inode);
wait_event_interruptible(ci->i_cap_wq,
r = wait_event_interruptible(ci->i_cap_wq,
context_is_writeable_or_written(inode, snapc));
ceph_put_snap_context(snapc);
if (r == -ERESTARTSYS)
return r;
return -EAGAIN;
}
@ -1035,7 +1041,7 @@ static int ceph_write_begin(struct file *file, struct address_space *mapping,
int r;
do {
/* get a page*/
/* get a page */
page = grab_cache_page_write_begin(mapping, index, 0);
if (!page)
return -ENOMEM;