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/*
Unix SMB/CIFS implementation.
POSIX NTVFS backend
Copyright (C) Andrew Tridgell 2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
this implements most of the POSIX NTVFS backend
This is the default backend
*/
#include "includes.h"
#include "vfs_posix.h"
#include "librpc/gen_ndr/security.h"
#include "tdb_compat.h"
#include "lib/tdb_wrap/tdb_wrap.h"
#include "libcli/security/security.h"
#include "lib/events/events.h"
#include "param/param.h"
/*
setup config options for a posix share
*/
static void pvfs_setup_options(struct pvfs_state *pvfs)
{
struct share_config *scfg = pvfs->ntvfs->ctx->config;
const char *eadb;
bool def_perm_override = false;
if (share_bool_option(scfg, SHARE_MAP_HIDDEN, SHARE_MAP_HIDDEN_DEFAULT))
pvfs->flags |= PVFS_FLAG_MAP_HIDDEN;
if (share_bool_option(scfg, SHARE_MAP_ARCHIVE, SHARE_MAP_ARCHIVE_DEFAULT))
pvfs->flags |= PVFS_FLAG_MAP_ARCHIVE;
if (share_bool_option(scfg, SHARE_MAP_SYSTEM, SHARE_MAP_SYSTEM_DEFAULT))
pvfs->flags |= PVFS_FLAG_MAP_SYSTEM;
if (share_bool_option(scfg, SHARE_READONLY, SHARE_READONLY_DEFAULT))
pvfs->flags |= PVFS_FLAG_READONLY;
if (share_bool_option(scfg, SHARE_STRICT_SYNC, SHARE_STRICT_SYNC_DEFAULT))
pvfs->flags |= PVFS_FLAG_STRICT_SYNC;
if (share_bool_option(scfg, SHARE_STRICT_LOCKING, SHARE_STRICT_LOCKING_DEFAULT))
pvfs->flags |= PVFS_FLAG_STRICT_LOCKING;
if (share_bool_option(scfg, SHARE_CI_FILESYSTEM, SHARE_CI_FILESYSTEM_DEFAULT))
pvfs->flags |= PVFS_FLAG_CI_FILESYSTEM;
if (share_bool_option(scfg, PVFS_FAKE_OPLOCKS, PVFS_FAKE_OPLOCKS_DEFAULT))
pvfs->flags |= PVFS_FLAG_FAKE_OPLOCKS;
if (share_bool_option(scfg, PVFS_AIO, false))
pvfs->flags |= PVFS_FLAG_LINUX_AIO;
#if defined(O_DIRECTORY) && defined(O_NOFOLLOW)
/* set PVFS_PERM_OVERRIDE by default only if the system
* supports the necessary capabilities to make it secure
*/
def_perm_override = true;
#endif
if (share_bool_option(scfg, PVFS_PERM_OVERRIDE, def_perm_override))
pvfs->flags |= PVFS_FLAG_PERM_OVERRIDE;
/* file perm options */
pvfs->options.create_mask = share_int_option(scfg,
SHARE_CREATE_MASK,
SHARE_CREATE_MASK_DEFAULT);
pvfs->options.dir_mask = share_int_option(scfg,
SHARE_DIR_MASK,
SHARE_DIR_MASK_DEFAULT);
pvfs->options.force_dir_mode = share_int_option(scfg,
SHARE_FORCE_DIR_MODE,
SHARE_FORCE_DIR_MODE_DEFAULT);
pvfs->options.force_create_mode = share_int_option(scfg,
SHARE_FORCE_CREATE_MODE,
SHARE_FORCE_CREATE_MODE_DEFAULT);
/* this must be a power of 2 */
pvfs->alloc_size_rounding = share_int_option(scfg,
PVFS_ALLOCATION_ROUNDING,
PVFS_ALLOCATION_ROUNDING_DEFAULT);
pvfs->search.inactivity_time = share_int_option(scfg,
PVFS_SEARCH_INACTIVITY,
PVFS_SEARCH_INACTIVITY_DEFAULT);
#if HAVE_XATTR_SUPPORT
if (share_bool_option(scfg, PVFS_XATTR, PVFS_XATTR_DEFAULT))
pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
#endif
pvfs->sharing_violation_delay = share_int_option(scfg,
PVFS_SHARE_DELAY,
PVFS_SHARE_DELAY_DEFAULT);
pvfs->oplock_break_timeout = share_int_option(scfg,
PVFS_OPLOCK_TIMEOUT,
PVFS_OPLOCK_TIMEOUT_DEFAULT);
pvfs->writetime_delay = share_int_option(scfg,
PVFS_WRITETIME_DELAY,
PVFS_WRITETIME_DELAY_DEFAULT);
pvfs->share_name = talloc_strdup(pvfs, scfg->name);
pvfs->fs_attribs =
FS_ATTR_CASE_SENSITIVE_SEARCH |
FS_ATTR_CASE_PRESERVED_NAMES |
FS_ATTR_UNICODE_ON_DISK |
FS_ATTR_SPARSE_FILES;
/* allow xattrs to be stored in a external tdb */
eadb = share_string_option(scfg, PVFS_EADB, NULL);
if (eadb != NULL) {
pvfs->ea_db = tdb_wrap_open(pvfs, eadb, 50000,
TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
pvfs->ntvfs->ctx->lp_ctx);
if (pvfs->ea_db != NULL) {
pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
} else {
DEBUG(0,("Failed to open eadb '%s' - %s\n",
eadb, strerror(errno)));
pvfs->flags &= ~PVFS_FLAG_XATTR_ENABLE;
}
}
if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
pvfs->fs_attribs |= FS_ATTR_NAMED_STREAMS;
}
if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
pvfs->fs_attribs |= FS_ATTR_PERSISTANT_ACLS;
}
pvfs->sid_cache.creator_owner = dom_sid_parse_talloc(pvfs, SID_CREATOR_OWNER);
pvfs->sid_cache.creator_group = dom_sid_parse_talloc(pvfs, SID_CREATOR_GROUP);
/* check if the system really supports xattrs */
if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
pvfs_xattr_probe(pvfs);
}
/* enable an ACL backend */
pvfs->acl_ops = pvfs_acl_backend_byname(share_string_option(scfg, PVFS_ACL, "xattr"));
}
static int pvfs_state_destructor(struct pvfs_state *pvfs)
{
struct pvfs_file *f, *fn;
struct pvfs_search_state *s, *sn;
/*
* make sure we cleanup files and searches before anything else
* because there destructors need to acess the pvfs_state struct
*/
for (f=pvfs->files.list; f; f=fn) {
fn = f->next;
talloc_free(f);
}
for (s=pvfs->search.list; s; s=sn) {
sn = s->next;
talloc_free(s);
}
return 0;
}
/*
connect to a share - used when a tree_connect operation comes
in. For a disk based backend we needs to ensure that the base
directory exists (tho it doesn't need to be accessible by the user,
that comes later)
*/
static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req,
union smb_tcon* tcon)
{
struct pvfs_state *pvfs;
struct stat st;
char *base_directory;
NTSTATUS status;
const char *sharename;
switch (tcon->generic.level) {
case RAW_TCON_TCON:
sharename = tcon->tcon.in.service;
break;
case RAW_TCON_TCONX:
sharename = tcon->tconx.in.path;
break;
case RAW_TCON_SMB2:
sharename = tcon->smb2.in.path;
break;
default:
return NT_STATUS_INVALID_LEVEL;
}
if (strncmp(sharename, "\\\\", 2) == 0) {
char *p = strchr(sharename+2, '\\');
if (p) {
sharename = p + 1;
}
}
/*
* TODO: call this from ntvfs_posix_init()
* but currently we don't have a lp_ctx there
*/
status = pvfs_acl_init();
NT_STATUS_NOT_OK_RETURN(status);
pvfs = talloc_zero(ntvfs, struct pvfs_state);
NT_STATUS_HAVE_NO_MEMORY(pvfs);
/* for simplicity of path construction, remove any trailing slash now */
base_directory = talloc_strdup(pvfs, share_string_option(ntvfs->ctx->config, SHARE_PATH, ""));
NT_STATUS_HAVE_NO_MEMORY(base_directory);
if (strcmp(base_directory, "/") != 0) {
trim_string(base_directory, NULL, "/");
}
pvfs->ntvfs = ntvfs;
pvfs->base_directory = base_directory;
/* the directory must exist. Note that we deliberately don't
check that it is readable */
if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) {
DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n",
pvfs->base_directory, sharename));
return NT_STATUS_BAD_NETWORK_NAME;
}
ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
if (tcon->generic.level == RAW_TCON_TCONX) {
tcon->tconx.out.fs_type = ntvfs->ctx->fs_type;
tcon->tconx.out.dev_type = ntvfs->ctx->dev_type;
}
ntvfs->private_data = pvfs;
pvfs->brl_context = brlock_init(pvfs,
pvfs->ntvfs->ctx->server_id,
pvfs->ntvfs->ctx->lp_ctx,
pvfs->ntvfs->ctx->msg_ctx);
if (pvfs->brl_context == NULL) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx);
if (pvfs->odb_context == NULL) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
/* allow this to be NULL - we just disable change notify */
pvfs->notify_context = notify_init(pvfs,
pvfs->ntvfs->ctx->server_id,
pvfs->ntvfs->ctx->msg_ctx,
pvfs->ntvfs->ctx->lp_ctx,
pvfs->ntvfs->ctx->event_ctx,
pvfs->ntvfs->ctx->config);
pvfs->wbc_ctx = wbc_init(pvfs,
pvfs->ntvfs->ctx->msg_ctx,
pvfs->ntvfs->ctx->event_ctx);
if (pvfs->wbc_ctx == NULL) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
/* allocate the search handle -> ptr tree */
pvfs->search.idtree = idr_init(pvfs);
NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree);
status = pvfs_mangle_init(pvfs);
NT_STATUS_NOT_OK_RETURN(status);
pvfs_setup_options(pvfs);
talloc_set_destructor(pvfs, pvfs_state_destructor);
#ifdef SIGXFSZ
/* who had the stupid idea to generate a signal on a large
file write instead of just failing it!? */
BlockSignals(true, SIGXFSZ);
#endif
return NT_STATUS_OK;
}
/*
disconnect from a share
*/
static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs)
{
return NT_STATUS_OK;
}
/*
check if a directory exists
*/
static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req,
union smb_chkpath *cp)
{
struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
struct pvfs_state);
struct pvfs_filename *name;
NTSTATUS status;
/* resolve the cifs name to a posix name */
status = pvfs_resolve_name(pvfs, req, cp->chkpath.in.path, 0, &name);
NT_STATUS_NOT_OK_RETURN(status);
if (!name->exists) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (!S_ISDIR(name->st.st_mode)) {
return NT_STATUS_NOT_A_DIRECTORY;
}
return NT_STATUS_OK;
}
/*
copy a set of files
*/
static NTSTATUS pvfs_copy(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, struct smb_copy *cp)
{
DEBUG(0,("pvfs_copy not implemented\n"));
return NT_STATUS_NOT_SUPPORTED;
}
/*
return print queue info
*/
static NTSTATUS pvfs_lpq(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, union smb_lpq *lpq)
{
return NT_STATUS_NOT_SUPPORTED;
}
/* SMBtrans - not used on file shares */
static NTSTATUS pvfs_trans(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, struct smb_trans2 *trans2)
{
return NT_STATUS_ACCESS_DENIED;
}
/*
initialialise the POSIX disk backend, registering ourselves with the ntvfs subsystem
*/
NTSTATUS ntvfs_posix_init(void)
{
NTSTATUS ret;
struct ntvfs_ops ops;
NTVFS_CURRENT_CRITICAL_SIZES(vers);
ZERO_STRUCT(ops);
ops.type = NTVFS_DISK;
/* fill in all the operations */
ops.connect_fn = pvfs_connect;
ops.disconnect_fn = pvfs_disconnect;
ops.unlink_fn = pvfs_unlink;
ops.chkpath_fn = pvfs_chkpath;
ops.qpathinfo_fn = pvfs_qpathinfo;
ops.setpathinfo_fn = pvfs_setpathinfo;
ops.open_fn = pvfs_open;
ops.mkdir_fn = pvfs_mkdir;
ops.rmdir_fn = pvfs_rmdir;
ops.rename_fn = pvfs_rename;
ops.copy_fn = pvfs_copy;
ops.ioctl_fn = pvfs_ioctl;
ops.read_fn = pvfs_read;
ops.write_fn = pvfs_write;
ops.seek_fn = pvfs_seek;
ops.flush_fn = pvfs_flush;
ops.close_fn = pvfs_close;
ops.exit_fn = pvfs_exit;
ops.lock_fn = pvfs_lock;
ops.setfileinfo_fn = pvfs_setfileinfo;
ops.qfileinfo_fn = pvfs_qfileinfo;
ops.fsinfo_fn = pvfs_fsinfo;
ops.lpq_fn = pvfs_lpq;
ops.search_first_fn = pvfs_search_first;
ops.search_next_fn = pvfs_search_next;
ops.search_close_fn = pvfs_search_close;
ops.trans_fn = pvfs_trans;
ops.logoff_fn = pvfs_logoff;
ops.async_setup_fn = pvfs_async_setup;
ops.cancel_fn = pvfs_cancel;
ops.notify_fn = pvfs_notify;
/* register ourselves with the NTVFS subsystem. We register
under the name 'default' as we wish to be the default
backend, and also register as 'posix' */
ops.name = "default";
ret = ntvfs_register(&ops, &vers);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
}
ops.name = "posix";
ret = ntvfs_register(&ops, &vers);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
}
if (NT_STATUS_IS_OK(ret)) {
ret = ntvfs_common_init();
}
return ret;
}
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