From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/fs/efs/symlink.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 kernel/fs/efs/symlink.c (limited to 'kernel/fs/efs/symlink.c') diff --git a/kernel/fs/efs/symlink.c b/kernel/fs/efs/symlink.c new file mode 100644 index 000000000..75117d0da --- /dev/null +++ b/kernel/fs/efs/symlink.c @@ -0,0 +1,54 @@ +/* + * symlink.c + * + * Copyright (c) 1999 Al Smith + * + * Portions derived from work (c) 1995,1996 Christian Vogelgsang. + */ + +#include +#include +#include +#include "efs.h" + +static int efs_symlink_readpage(struct file *file, struct page *page) +{ + char *link = kmap(page); + struct buffer_head * bh; + struct inode * inode = page->mapping->host; + efs_block_t size = inode->i_size; + int err; + + err = -ENAMETOOLONG; + if (size > 2 * EFS_BLOCKSIZE) + goto fail; + + /* read first 512 bytes of link target */ + err = -EIO; + bh = sb_bread(inode->i_sb, efs_bmap(inode, 0)); + if (!bh) + goto fail; + memcpy(link, bh->b_data, (size > EFS_BLOCKSIZE) ? EFS_BLOCKSIZE : size); + brelse(bh); + if (size > EFS_BLOCKSIZE) { + bh = sb_bread(inode->i_sb, efs_bmap(inode, 1)); + if (!bh) + goto fail; + memcpy(link + EFS_BLOCKSIZE, bh->b_data, size - EFS_BLOCKSIZE); + brelse(bh); + } + link[size] = '\0'; + SetPageUptodate(page); + kunmap(page); + unlock_page(page); + return 0; +fail: + SetPageError(page); + kunmap(page); + unlock_page(page); + return err; +} + +const struct address_space_operations efs_symlink_aops = { + .readpage = efs_symlink_readpage +}; -- cgit 1.2.3-korg