symlink.c
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上传日期:2013-02-24
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文件大小:1k
- /*
- * Symlink inode operations for Coda filesystem
- * Original version: (C) 1996 P. Braam and M. Callahan
- * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
- *
- * Carnegie Mellon encourages users to contribute improvements to
- * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
- */
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/fs.h>
- #include <linux/stat.h>
- #include <linux/errno.h>
- #include <linux/locks.h>
- #include <linux/smp_lock.h>
- #include <linux/coda.h>
- #include <linux/coda_linux.h>
- #include <linux/coda_psdev.h>
- #include <linux/coda_fs_i.h>
- #include <linux/coda_proc.h>
- static int coda_symlink_filler(struct file *file, struct page *page)
- {
- struct inode *inode = page->mapping->host;
- int error;
- struct coda_inode_info *cii;
- unsigned int len = PAGE_SIZE;
- char *p = kmap(page);
- lock_kernel();
- cii = ITOC(inode);
- coda_vfs_stat.follow_link++;
- error = venus_readlink(inode->i_sb, &cii->c_fid, p, &len);
- unlock_kernel();
- if (error)
- goto fail;
- SetPageUptodate(page);
- kunmap(page);
- UnlockPage(page);
- return 0;
- fail:
- SetPageError(page);
- kunmap(page);
- UnlockPage(page);
- return error;
- }
- struct address_space_operations coda_symlink_aops = {
- readpage: coda_symlink_filler
- };