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 }; 56