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-rw-r--r--source4/ntvfs/posix/vfs_posix.c426
1 files changed, 426 insertions, 0 deletions
diff --git a/source4/ntvfs/posix/vfs_posix.c b/source4/ntvfs/posix/vfs_posix.c
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--- /dev/null
+++ b/source4/ntvfs/posix/vfs_posix.c
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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.h>
+#include "lib/tdb_wrap/tdb_wrap.h"
+#include "libcli/security/security.h"
+#include "lib/events/events.h"
+#include "param/param.h"
+#include "lib/util/idtree.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;
+ char *eadb;
+ char *xattr_backend;
+ 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 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);
+
+#ifdef 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;
+
+ /* allow xattrs to be stored in a external tdb */
+ eadb = share_string_option(pvfs, scfg, PVFS_EADB, NULL);
+ if (eadb != NULL) {
+ pvfs->ea_db = tdb_wrap_open(
+ pvfs, eadb, 50000,
+ lpcfg_tdb_flags(pvfs->ntvfs->ctx->lp_ctx, TDB_DEFAULT),
+ O_RDWR|O_CREAT, 0600);
+ 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;
+ }
+ TALLOC_FREE(eadb);
+ }
+
+ 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 */
+ xattr_backend = share_string_option(pvfs, scfg, PVFS_ACL, "xattr");
+ pvfs->acl_ops = pvfs_acl_backend_byname(xattr_backend);
+ TALLOC_FREE(xattr_backend);
+}
+
+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 access 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 = share_string_option(pvfs, 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);
+
+ /* 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;
+}
+
+/*
+ initialise the POSIX disk backend, registering ourselves with the ntvfs subsystem
+ */
+NTSTATUS ntvfs_posix_init(TALLOC_CTX *ctx)
+{
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 06:41:27 +0000