land b1_5 onto HEAD

[fs/lustre-release.git] / lustre / snapfs / dotsnap.c

diff --git a/lustre/snapfs/dotsnap.c b/lustre/snapfs/dotsnap.c
deleted file mode 100644 (file)
index 62c026d..0000000
--- a/lustre/snapfs/dotsnap.c
+++ /dev/null
@@ -1,190 +0,0 @@
-/*
- * dotsnap.c - support for .snap directories
- */
-
-#define DEBUG_SUBSYSTEM S_SNAP
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/stat.h>
-#include <linux/unistd.h>
-#include <linux/jbd.h>
-#include <linux/ext3_fs.h>
-#include <linux/snap.h>
-
-#include "snapfs_internal.h" 
-
-struct inode_operations dotsnap_inode_operations;
-struct file_operations dotsnap_file_operations;
-
-int currentfs_is_under_dotsnap(struct dentry *de) 
-{
-       int index = 0;
-
-       while(de && de->d_parent != de) {
-               if ( de->d_inode && de->d_inode->i_ino & 0xF0000000 ) {
-                       EXIT;
-                       return index;
-               }
-               index = (int)de->d_fsdata;
-               de = de->d_parent;
-       }
-
-       RETURN(0);
-}
-
-void currentfs_dotsnap_read_inode(struct snap_cache *cache, 
-                                 struct inode *inode)
-{
-       int tableno = cache->cache_snap_tableno; 
-       struct snap_table *table; 
-       ENTRY;
-
-       table = &snap_tables[tableno];
-
-       inode->i_mode = S_IFDIR | 0755 ;
-       inode->i_op = &dotsnap_inode_operations;
-       inode->i_size = table->tbl_count - 1; 
-       /* all except current form a subdirectory and . and .. */
-       inode->i_nlink = table->tbl_count -1 + 2;
-       inode->i_uid = 0;
-       inode->i_gid = 0;
-       EXIT;
-}
-
-struct dentry *dotsnap_lookup(struct inode *dir,  struct dentry *dentry)
-{
-       struct snap_table       *table;
-       struct snap_cache       *cache;
-       int i;
-       int index;
-       int tableno; 
-       ino_t ino;
-       struct inode *inode;
-       struct snapshot_operations *snapops;
-
-       ENTRY;
-
-       cache = snap_find_cache(dir->i_dev);
-       if ( !cache ) {
-               CERROR("dotsnap_readdir: cannot find cache\n");
-               make_bad_inode(dir);
-               RETURN(ERR_PTR(-EINVAL));
-       }
-
-       snapops = filter_c2csnapops(cache->cache_filter);
-       if (!snapops || !snapops->get_indirect_ino) {
-                RETURN(ERR_PTR(-EINVAL));
-        }
-
-       tableno = cache->cache_snap_tableno; 
-       table = &snap_tables[tableno];
-
-       if( table->tbl_count <= 1 )
-               RETURN(NULL);
-       
-       index = table->snap_items[0].index;; 
-       for ( i = 1 ; i < table->tbl_count ; i++ ) {
-               if ( (dentry->d_name.len == strlen(table->snap_items[i].name)) &&
-                    (memcmp(&dentry->d_name.name[0], &table->snap_items[i].name[0], 
-                            dentry->d_name.len) == 0) ) {
-                       index = table->snap_items[i].index; 
-                       break;
-               }
-       }
-       
-       if( i >= table->tbl_count )
-               RETURN(ERR_PTR(-ENOENT));
-
-       inode = iget(dir->i_sb, dir->i_ino & (~0xF0000000));
-
-        if ( !inode ) 
-                RETURN(ERR_PTR(-EINVAL));
-
-       ino =  snapops->get_indirect_ino(inode, index);
-       iput(inode); 
-
-       if ( ino == -ENOATTR || ino == 0 ) {
-               ino = dir->i_ino & (~0xF0000000);
-       }
-
-       if ( ino == -EINVAL ) {
-               RETURN(ERR_PTR(-EINVAL));
-       }
-       CDEBUG(D_INODE, "index %d, ino is %lu\n",index, ino);
-
-       inode = iget(dir->i_sb, ino);
-       d_add(dentry, inode); 
-       dentry->d_fsdata = (void*)index;
-       inode->i_op = dentry->d_parent->d_parent->d_inode->i_op;
-       RETURN(NULL);
-}
-
-
-static int dotsnap_readdir(struct file * filp,
-                          void * dirent, filldir_t filldir)
-{
-       unsigned int i;
-       int tableno;
-       struct snap_cache *cache;
-       struct snap_table *table; 
-       struct snapshot_operations *snapops;
-
-       ENTRY; 
-
-       cache = snap_find_cache(filp->f_dentry->d_inode->i_dev);
-       if ( !cache ) {
-               CDEBUG(D_INODE, "dotsnap_readdir: cannot find cache\n");
-               make_bad_inode(filp->f_dentry->d_inode);
-               RETURN(-EINVAL);
-       }
-
-       snapops = filter_c2csnapops(cache->cache_filter);
-       if (!snapops || !snapops->get_indirect_ino) {
-                RETURN(-EINVAL);
-        }
-
-       tableno = cache->cache_snap_tableno; 
-       table = &snap_tables[tableno];
-       for (i = filp->f_pos ; i < table->tbl_count -1 ; i++) {
-               int index;
-               struct inode *inode;
-               ino_t ino;
-
-
-               inode = filp->f_dentry->d_inode;
-               index = table->snap_items[i+1].index;
-               ino =  snapops->get_indirect_ino 
-                       (filp->f_dentry->d_inode, index);
-
-               if ( ino == -ENOATTR || ino == 0 ) {
-                       ino = filp->f_dentry->d_parent->d_inode->i_ino;
-               }
-               
-               if ( ino == -EINVAL ) {
-                       return -EINVAL;
-               }
-
-               CDEBUG(D_INODE, "Listing %s\n", &table->snap_items[i+1].name[0]);       
-               if (filldir(dirent, &table->snap_items[i+1].name[0],
-                           strlen(&table->snap_items[i+1].name[0]),
-                           filp->f_pos, ino, 0) < 0){
-                       CDEBUG(D_INODE, "\n");
-                       break;
-               }
-               filp->f_pos++;
-       }
-       RETURN(0);
-}
-
-
-struct file_operations dotsnap_file_operations = {
-        readdir: dotsnap_readdir,        /* readdir */
-};
-
-struct inode_operations dotsnap_inode_operations =
-{
-       lookup: dotsnap_lookup
-};