diff options
| -rw-r--r-- | fs/namei.c | 32 |
1 files changed, 13 insertions, 19 deletions
@@ -4518,7 +4518,7 @@ int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen) EXPORT_SYMBOL(generic_readlink); /* get the link contents into pagecache */ -static char *page_getlink(struct dentry * dentry, struct page **ppage) +static const char *page_getlink(struct dentry * dentry, void **cookie) { char *kaddr; struct page *page; @@ -4526,31 +4526,15 @@ static char *page_getlink(struct dentry * dentry, struct page **ppage) page = read_mapping_page(mapping, 0, NULL); if (IS_ERR(page)) return (char*)page; - *ppage = page; + *cookie = page; kaddr = kmap(page); nd_terminate_link(kaddr, dentry->d_inode->i_size, PAGE_SIZE - 1); return kaddr; } -int page_readlink(struct dentry *dentry, char __user *buffer, int buflen) -{ - struct page *page = NULL; - int res = readlink_copy(buffer, buflen, page_getlink(dentry, &page)); - if (page) { - kunmap(page); - page_cache_release(page); - } - return res; -} -EXPORT_SYMBOL(page_readlink); - const char *page_follow_link_light(struct dentry *dentry, void **cookie) { - struct page *page = NULL; - char *res = page_getlink(dentry, &page); - if (!IS_ERR(res)) - *cookie = page; - return res; + return page_getlink(dentry, cookie); } EXPORT_SYMBOL(page_follow_link_light); @@ -4562,6 +4546,16 @@ void page_put_link(struct inode *unused, void *cookie) } EXPORT_SYMBOL(page_put_link); +int page_readlink(struct dentry *dentry, char __user *buffer, int buflen) +{ + void *cookie = NULL; + int res = readlink_copy(buffer, buflen, page_getlink(dentry, &cookie)); + if (cookie) + page_put_link(NULL, cookie); + return res; +} +EXPORT_SYMBOL(page_readlink); + /* * The nofs argument instructs pagecache_write_begin to pass AOP_FLAG_NOFS */ |
