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Linux/fs/coda/symlink.c

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  1 /*
  2  * Symlink inode operations for Coda filesystem
  3  * Original version: (C) 1996 P. Braam and M. Callahan
  4  * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
  5  * 
  6  * Carnegie Mellon encourages users to contribute improvements to
  7  * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
  8  */
  9 
 10 #include <linux/types.h>
 11 #include <linux/kernel.h>
 12 #include <linux/sched.h>
 13 #include <linux/fs.h>
 14 #include <linux/stat.h>
 15 #include <linux/errno.h>
 16 #include <linux/locks.h>
 17 #include <linux/smp_lock.h>
 18 
 19 #include <linux/coda.h>
 20 #include <linux/coda_linux.h>
 21 #include <linux/coda_psdev.h>
 22 #include <linux/coda_fs_i.h>
 23 #include <linux/coda_proc.h>
 24 
 25 static int coda_symlink_filler(struct file *file, struct page *page)
 26 {
 27         struct inode *inode = page->mapping->host;
 28         int error;
 29         struct coda_inode_info *cii;
 30         unsigned int len = PAGE_SIZE;
 31         char *p = kmap(page);
 32 
 33         lock_kernel();
 34         cii = ITOC(inode);
 35         coda_vfs_stat.follow_link++;
 36 
 37         error = venus_readlink(inode->i_sb, &cii->c_fid, p, &len);
 38         unlock_kernel();
 39         if (error)
 40                 goto fail;
 41         SetPageUptodate(page);
 42         kunmap(page);
 43         UnlockPage(page);
 44         return 0;
 45 
 46 fail:
 47         SetPageError(page);
 48         kunmap(page);
 49         UnlockPage(page);
 50         return error;
 51 }
 52 
 53 struct address_space_operations coda_symlink_aops = {
 54         readpage:       coda_symlink_filler
 55 };
 56 

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