diff options
Diffstat (limited to 'fs/ceph/addr.c')
| -rw-r--r-- | fs/ceph/addr.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 23bb0ce..aa3cd7c 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -5,6 +5,7 @@ #include <linux/mm.h> #include <linux/pagemap.h> #include <linux/writeback.h> /* generic_writepages */ +#include <linux/slab.h> #include <linux/pagevec.h> #include <linux/task_io_accounting_ops.h> @@ -919,6 +920,10 @@ 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 +966,11 @@ 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 +1042,7 @@ 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; |