fs/coda/symlink.c

   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/time.h>
  13 #include <linux/fs.h>
  14 #include <linux/stat.h>
  15 #include <linux/errno.h>
  16 #include <linux/pagemap.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         unlock_page(page);
  44         return 0;
  45
  46 fail:
  47         SetPageError(page);
  48         kunmap(page);
  49         unlock_page(page);
  50         return error;
  51 }
  52
  53 const struct address_space_operations coda_symlink_aops = {
  54         .readpage       = coda_symlink_filler,
  55 };