source3/modules/vfs_onefs.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * Support for OneFS
   4  *
   5  * Copyright (C) Tim Prouty, 2008
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "includes.h"
  22 #include "smbd/smbd.h"
  23 #include "onefs.h"
  24 #include "onefs_config.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_VFS
  28
  29 static int onefs_connect(struct vfs_handle_struct *handle, const char *service,
  30                          const char *user)
  31 {
  32         int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
  33
  34         if (ret < 0) {
  35                 return ret;
  36         }
  37
  38         ret = onefs_load_config(handle->conn);
  39         if (ret) {
  40                 SMB_VFS_NEXT_DISCONNECT(handle);
  41                 DEBUG(3, ("Load config failed: %s\n", strerror(errno)));
  42                 return ret;
  43         }
  44
  45         return 0;
  46 }
  47
  48 static int onefs_mkdir(vfs_handle_struct *handle, const char *path,
  49                        mode_t mode)
  50 {
  51         /* SMB_VFS_MKDIR should never be called in vfs_onefs */
  52         SMB_ASSERT(false);
  53         return SMB_VFS_NEXT_MKDIR(handle, path, mode);
  54 }
  55
  56 static int onefs_open(vfs_handle_struct *handle,
  57                       struct smb_filename *smb_fname,
  58                       files_struct *fsp, int flags, mode_t mode)
  59 {
  60         /* SMB_VFS_OPEN should never be called in vfs_onefs */
  61         SMB_ASSERT(false);
  62         return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
  63 }
  64
  65 static ssize_t onefs_sendfile(vfs_handle_struct *handle, int tofd,
  66                               files_struct *fromfsp, const DATA_BLOB *header,
  67                               SMB_OFF_T offset, size_t count)
  68 {
  69         ssize_t result;
  70
  71         START_PROFILE_BYTES(syscall_sendfile, count);
  72         result = onefs_sys_sendfile(handle->conn, tofd, fromfsp->fh->fd,
  73                                     header, offset, count);
  74         END_PROFILE(syscall_sendfile);
  75         return result;
  76 }
  77
  78 static ssize_t onefs_recvfile(vfs_handle_struct *handle, int fromfd,
  79                               files_struct *tofsp, SMB_OFF_T offset,
  80                               size_t count)
  81 {
  82         ssize_t result;
  83
  84         START_PROFILE_BYTES(syscall_recvfile, count);
  85         result = onefs_sys_recvfile(fromfd, tofsp->fh->fd, offset, count);
  86         END_PROFILE(syscall_recvfile);
  87         return result;
  88 }
  89
  90 static uint64_t onefs_get_alloc_size(struct vfs_handle_struct *handle,
  91                                      files_struct *fsp,
  92                                      const SMB_STRUCT_STAT *sbuf)
  93 {
  94         uint64_t result;
  95
  96         START_PROFILE(syscall_get_alloc_size);
  97
  98         if(S_ISDIR(sbuf->st_ex_mode)) {
  99                 result = 0;
 100                 goto out;
 101         }
 102
 103         /* Just use the file size since st_blocks is unreliable on OneFS. */
 104         result = get_file_size_stat(sbuf);
 105
 106         if (fsp && fsp->initial_allocation_size)
 107                 result = MAX(result,fsp->initial_allocation_size);
 108
 109         result = smb_roundup(handle->conn, result);
 110
 111  out:
 112         END_PROFILE(syscall_get_alloc_size);
 113         return result;
 114 }
 115
 116 static struct file_id onefs_file_id_create(struct vfs_handle_struct *handle,
 117                                            const SMB_STRUCT_STAT *sbuf)
 118 {
 119         struct file_id key;
 120
 121         /* the ZERO_STRUCT ensures padding doesn't break using the key as a
 122          * blob */
 123         ZERO_STRUCT(key);
 124
 125         key.devid = sbuf->st_ex_dev;
 126         key.inode = sbuf->st_ex_ino;
 127         key.extid = sbuf->vfs_private;
 128
 129         return key;
 130 }
 131
 132 static int onefs_statvfs(vfs_handle_struct *handle, const char *path,
 133                          vfs_statvfs_struct *statbuf)
 134 {
 135         struct statvfs statvfs_buf;
 136         int result;
 137
 138         DEBUG(5, ("Calling SMB_STAT_VFS \n"));
 139         result = statvfs(path, &statvfs_buf);
 140         ZERO_STRUCTP(statbuf);
 141
 142         if (!result) {
 143                 statbuf->OptimalTransferSize = statvfs_buf.f_iosize;
 144                 statbuf->BlockSize = statvfs_buf.f_bsize;
 145                 statbuf->TotalBlocks = statvfs_buf.f_blocks;
 146                 statbuf->BlocksAvail = statvfs_buf.f_bfree;
 147                 statbuf->UserBlocksAvail = statvfs_buf.f_bavail;
 148                 statbuf->TotalFileNodes = statvfs_buf.f_files;
 149                 statbuf->FreeFileNodes = statvfs_buf.f_ffree;
 150                 statbuf->FsIdentifier =
 151                     (((uint64_t)statvfs_buf.f_fsid.val[0]<<32) &
 152                         0xffffffff00000000LL) |
 153                     (uint64_t)statvfs_buf.f_fsid.val[1];
 154         }
 155         return result;
 156 }
 157
 158 static int onefs_get_real_filename(vfs_handle_struct *handle, const char *path,
 159                                    const char *name, TALLOC_CTX *mem_ctx,
 160                                    char **found_name)
 161 {
 162         struct stat sb;
 163         struct connection_struct *conn = handle->conn;
 164         struct stat_extra se;
 165         int result;
 166         char *unmangled_name = NULL;
 167         char *full_name = NULL;
 168
 169         /* First demangle the name if necessary. */
 170         if (!conn->case_sensitive && mangle_is_mangled(name, conn->params) &&
 171             mangle_lookup_name_from_8_3(mem_ctx, name, &unmangled_name,
 172                                         conn->params)) {
 173                 /* Name is now unmangled. */
 174                 name = unmangled_name;
 175         }
 176
 177         /* Do the case insensitive stat. */
 178         ZERO_STRUCT(se);
 179         se.se_version = ESTAT_CURRENT_VERSION;
 180         se.se_flags = ESTAT_CASE_INSENSITIVE | ESTAT_SYMLINK_NOFOLLOW;
 181
 182         if (*path != '\0') {
 183                 if (!(full_name = talloc_asprintf(mem_ctx, "%s/%s", path, name))) {
 184                         errno = ENOMEM;
 185                         DEBUG(2, ("talloc_asprintf failed\n"));
 186                         result = -1;
 187                         goto done;
 188                 }
 189         }
 190
 191         if ((result = estat(full_name ? full_name : name, &sb, &se)) != 0) {
 192                 DEBUG(2, ("error calling estat: %s\n", strerror(errno)));
 193                 goto done;
 194         }
 195
 196         *found_name = talloc_strdup(mem_ctx, se.se_realname);
 197         if (*found_name == NULL) {
 198                 errno = ENOMEM;
 199                 result = -1;
 200                 goto done;
 201         }
 202
 203 done:
 204         TALLOC_FREE(full_name);
 205         TALLOC_FREE(unmangled_name);
 206         return result;
 207 }
 208
 209 static int onefs_ntimes(vfs_handle_struct *handle,
 210                         const struct smb_filename *smb_fname,
 211                         struct smb_file_time *ft)
 212 {
 213         int flags = 0;
 214         struct timespec times[3];
 215
 216         if (!null_timespec(ft->atime)) {
 217                 flags |= VT_ATIME;
 218                 times[0] = ft->atime;
 219                 DEBUG(6,("**** onefs_ntimes: actime: %s.%d\n",
 220                         time_to_asc(convert_timespec_to_time_t(ft->atime)),
 221                         ft->atime.tv_nsec));
 222         }
 223
 224         if (!null_timespec(ft->mtime)) {
 225                 flags |= VT_MTIME;
 226                 times[1] = ft->mtime;
 227                 DEBUG(6,("**** onefs_ntimes: modtime: %s.%d\n",
 228                         time_to_asc(convert_timespec_to_time_t(ft->mtime)),
 229                         ft->mtime.tv_nsec));
 230         }
 231
 232         if (!null_timespec(ft->create_time)) {
 233                 flags |= VT_BTIME;
 234                 times[2] = ft->create_time;
 235                 DEBUG(6,("**** onefs_ntimes: createtime: %s.%d\n",
 236                    time_to_asc(convert_timespec_to_time_t(ft->create_time)),
 237                    ft->create_time.tv_nsec));
 238         }
 239
 240         return onefs_vtimes_streams(handle, smb_fname, flags, times);
 241 }
 242
 243 static uint32_t onefs_fs_capabilities(struct vfs_handle_struct *handle, enum timestamp_set_resolution *p_ts_res)
 244 {
 245         uint32_t result = 0;
 246
 247         if (!lp_parm_bool(SNUM(handle->conn), PARM_ONEFS_TYPE,
 248                 PARM_IGNORE_STREAMS, PARM_IGNORE_STREAMS_DEFAULT)) {
 249                 result |= FILE_NAMED_STREAMS;
 250         }
 251
 252         result |= SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res);
 253         *p_ts_res = TIMESTAMP_SET_MSEC;
 254         return result;
 255 }
 256
 257 static struct vfs_fn_pointers onefs_fns = {
 258         .connect_fn = onefs_connect,
 259         .fs_capabilities = onefs_fs_capabilities,
 260         .opendir = onefs_opendir,
 261         .readdir = onefs_readdir,
 262         .seekdir = onefs_seekdir,
 263         .telldir = onefs_telldir,
 264         .rewind_dir = onefs_rewinddir,
 265         .mkdir = onefs_mkdir,
 266         .closedir = onefs_closedir,
 267         .init_search_op = onefs_init_search_op,
 268         .open_fn = onefs_open,
 269         .create_file = onefs_create_file,
 270         .close_fn = onefs_close,
 271         .sendfile = onefs_sendfile,
 272         .recvfile = onefs_recvfile,
 273         .rename = onefs_rename,
 274         .stat = onefs_stat,
 275         .fstat = onefs_fstat,
 276         .lstat = onefs_lstat,
 277         .get_alloc_size = onefs_get_alloc_size,
 278         .unlink = onefs_unlink,
 279         .ntimes = onefs_ntimes,
 280         .file_id_create = onefs_file_id_create,
 281         .streaminfo = onefs_streaminfo,
 282         .brl_lock_windows = onefs_brl_lock_windows,
 283         .brl_unlock_windows = onefs_brl_unlock_windows,
 284         .brl_cancel_windows = onefs_brl_cancel_windows,
 285         .strict_lock = onefs_strict_lock,
 286         .strict_unlock = onefs_strict_unlock,
 287         .notify_watch = onefs_notify_watch,
 288         .fget_nt_acl = onefs_fget_nt_acl,
 289         .get_nt_acl = onefs_get_nt_acl,
 290         .fset_nt_acl = onefs_fset_nt_acl,
 291         .statvfs = onefs_statvfs,
 292         .get_real_filename = onefs_get_real_filename,
 293 };
 294
 295 NTSTATUS vfs_onefs_init(void)
 296 {
 297         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "onefs",
 298                                 &onefs_fns);
 299 }