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