lkml.org 
[lkml]   [2006]   [Mar]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Date
Subject[PATCH 002 of 4] Honour AOP_TRUNCATE_PAGE returns in page_symlink

As prepare_write, commit_write and readpage are allowed to return
AOP_TRUNCATE_PAGE, page_symlink should respond to them.

Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
./fs/namei.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)

diff ./fs/namei.c~current~ ./fs/namei.c
--- ./fs/namei.c~current~ 2006-03-09 17:29:35.000000000 +1100
+++ ./fs/namei.c 2006-03-13 10:43:40.000000000 +1100
@@ -2628,19 +2628,31 @@ void page_put_link(struct dentry *dentry
int page_symlink(struct inode *inode, const char *symname, int len)
{
struct address_space *mapping = inode->i_mapping;
- struct page *page = grab_cache_page(mapping, 0);
+ struct page *page;
int err = -ENOMEM;
char *kaddr;

+ retry:
+ page = grab_cache_page(mapping, 0);
if (!page)
goto fail;
err = mapping->a_ops->prepare_write(NULL, page, 0, len-1);
+ if (err == AOP_TRUNCATED_PAGE) {
+ page_cache_release(page);
+ goto retry;
+ }
if (err)
goto fail_map;
kaddr = kmap_atomic(page, KM_USER0);
memcpy(kaddr, symname, len-1);
kunmap_atomic(kaddr, KM_USER0);
- mapping->a_ops->commit_write(NULL, page, 0, len-1);
+ err = mapping->a_ops->commit_write(NULL, page, 0, len-1);
+ if (err == AOP_TRUNCATED_PAGE) {
+ page_cache_release(page);
+ goto retry;
+ }
+ if (err)
+ goto fail_map;
/*
* Notice that we are _not_ going to block here - end of page is
* unmapped, so this will only try to map the rest of page, see
@@ -2650,7 +2662,8 @@ int page_symlink(struct inode *inode, co
*/
if (!PageUptodate(page)) {
err = mapping->a_ops->readpage(NULL, page);
- wait_on_page_locked(page);
+ if (err != AOP_TRUNCATED_PAGE)
+ wait_on_page_locked(page);
} else {
unlock_page(page);
}
-
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: 2006-03-13 00:58    [W:0.072 / U:4.004 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site