From: NeilBrown Date: Sat, 25 Mar 2006 11:07:57 +0000 (-0800) Subject: [PATCH] Honour AOP_TRUNCATE_PAGE returns in page_symlink X-Git-Tag: v2.6.17-rc1~777 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e53cac41da9ebb9be774220c1b2615182667c9d;p=linux-2.6 [PATCH] 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/fs/namei.c b/fs/namei.c index 1baf1b06fe..712dfc7779 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2627,16 +2627,27 @@ int __page_symlink(struct inode *inode, const char *symname, int len, int err = -ENOMEM; char *kaddr; +retry: page = find_or_create_page(mapping, 0, gfp_mask); 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 @@ -2646,7 +2657,8 @@ int __page_symlink(struct inode *inode, const char *symname, int len, */ 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); }