static int nfs_rename(struct inode *old_dir, const char *old_name, int old_len,
struct inode *new_dir, const char *new_name, int new_len,
int must_be_dir)
{
int error;
if (!old_dir || !S_ISDIR(old_dir->i_mode)) {
printk("nfs_rename: old inode is NULL or not a directory\n");
iput(old_dir);
iput(new_dir);
return -ENOENT;
}
if (!new_dir || !S_ISDIR(new_dir->i_mode)) {
printk("nfs_rename: new inode is NULL or not a directory\n");
iput(old_dir);
iput(new_dir);
return -ENOENT;
}
if (old_len > NFS_MAXNAMLEN || new_len > NFS_MAXNAMLEN) {
iput(old_dir);
iput(new_dir);
return -ENAMETOOLONG;
}
error = nfs_proc_rename(NFS_SERVER(old_dir),
NFS_FH(old_dir), old_name,
NFS_FH(new_dir), new_name,
must_be_dir);
nfs_lookup_cache_remove(old_dir, NULL, old_name);
nfs_lookup_cache_remove(new_dir, NULL, new_name);
iput(old_dir);
iput(new_dir);
return error;
}
static int nfs_sillyrename(struct inode *dir, const char *name, int len)
{
struct inode *inode;
char silly[16];
int slen, ret;
dir->i_count++;
if (nfs_lookup(dir, name, len, &inode) < 0)
return -EIO; /* arbitrary */
if (inode->i_count == 1 || NFS_RENAMED_DIR(inode)) {
iput(inode);
return -EIO;
}
slen = sprintf(silly, ".nfs%ld", inode->i_ino);
if (len == slen && !strncmp(name, silly, len)) {
iput(inode);
return -EIO; /* DWIM */
}
ret = nfs_proc_rename(NFS_SERVER(dir), NFS_FH(dir), name,
NFS_FH(dir), silly, 0);
if (ret >= 0) {
nfs_lookup_cache_remove(dir, NULL, name);
nfs_lookup_cache_remove(dir, NULL, silly);
NFS_RENAMED_DIR(inode) = dir;
dir->i_count++;
}
iput(inode);
return ret;
}
int
nfs_rename(struct file *filpfrom, const char *namefrom,
struct file *filpto, const char *nameto) {
/* it will be guaranteed that both filp are the same type
I guess I will have to make sure that they are in the same
server ??
*/
struct nfs_fh *fhandlefrom, *fhandleto;
int status;
DPRINTF(CLU_LEVEL,("nfs_rename:\n"));
if (namefrom == NULL || nameto == NULL) {
errno = EFAULT;
return -1;
} else if (*namefrom == (char)NULL || *nameto == (char)NULL) {
errno = ENOENT;
return -1;
}
demand(filpfrom, bogus filp);
demand(filpto, bogus filp);
demand(filpfrom->op_type == filpto->op_type,
filpfrom and filpto are of different types!!);
fhandlefrom = GETFHANDLE(filpfrom);
fhandleto = GETFHANDLE(filpto);
status = nfs_proc_rename(fhandlefrom,namefrom,
fhandleto, nameto);
if (status != 0) {
errno = status;
return -1;
} else {
nfs_cache_remove(filpfrom,namefrom);
nfs_cache_remove(filpto,nameto); /* should be adding this entry */
nfs_flush_filp(filpfrom);
if (filpfrom != filpto) nfs_flush_filp(filpto);
return 0;
}
}
/* The following X functions affect are the only ones that affect the name
cache (and the directory cache):
nfs_open (in file nfs_lookup_cache.c),
nfs_lookup (in file nfs_lookup_cache.c),
nfs_link,
nfs_symlink,
nfs_mkdir,
nfs_rmdir,
nfs_rename
*/
int
nfs_unlink(struct file *dirp, const char *name) {
nfsc_p d,f;
int dev;
struct nfs_fh *fhandle;
int status,lookup_status;
DPRINTF(CLU_LEVEL,("** nfs_unlink %s\n",name));
demand(dirp, bogus filp);
d = GETNFSCE(dirp);
fhandle = GETFHANDLE(dirp);
dev = FHGETDEV(fhandle);
lookup_status = nfs_cache_lookup(dev,GETNFSCEINO(d),name,&f);
switch(lookup_status) {
case -1:
/* negative cache hit, treat it as a miss to be sure is properly removed */
case 0:
/* cache miss */
{
struct nfs_fh fhandle2;
struct nfs_fattr temp_fattr;
k2printf("nfs_unlink: nfs_proc_lookup %s\n",name);
status = nfs_proc_lookup(fhandle,
name,
&fhandle2,
&temp_fattr);
if (status != 0) {
errno = status;
return -1;
}
f = nfsc_get(dev,temp_fattr.fileid);
nfs_fill_stat(&temp_fattr, f);
}
/* fall-through now that we have setup f */
case 1:
/* cache hit */
if (nfsc_get_refcnt(f) == 1) {
/* last copy */
if (S_ISDIR(nfsc_get_mode(f))) {
status = nfs_proc_rmdir(fhandle, name);
//fprintf(stderr,"rmdir status %d\n",status);
} else {
status = nfs_proc_remove(fhandle,name);
//fprintf(stderr,"remove status %d\n",status);
}
if (status == 0) {
nfs_cache_remove(dirp,NULL);
nfs_flush_filp(dirp);
}
nfsc_put(f);
if (status != 0) {
errno = status; return -1;
}
return 0;
} else {
/* has other references */
static int i = 0;
char difname[NAME_MAX];
//fprintf(stderr,"removing a file that is still referenced: %s\n",name);
demand (!(S_ISDIR(f->sb.st_mode)), removing last ref directory);
if (i == 0) atexit(nfs_process_unlinkatend);
sprintf(difname,".nfs%d%d.%s",time(0),i++,name);
status = nfs_proc_rename(fhandle,name,fhandle,difname);
if (status != 0) fprintf(stderr,"could not rename %s\n",name);
nfs_cache_remove(dirp,name);
nfs_flush_filp(dirp);
nfs_unlinkatend(difname, fhandle);
nfsc_put(f);
/* since it will be unlinked we can avoid flushing on close */
nfsc_or_flags(f,NFSCE_WILLBEGONE);
return 0;
}
default:
PR;
assert(0);
return 0;
}
}
