-/*
+/*
Unix SMB/CIFS implementation.
Files[] structure handling
Copyright (C) Andrew Tridgell 1998
#include "includes.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
+#include "smbd/smbXsrv_open.h"
#include "libcli/security/security.h"
#include "util_tdb.h"
#include "lib/util/bitmap.h"
+#include "lib/util/strv.h"
#define FILE_HANDLE_OFFSET 0x1000
+static NTSTATUS fsp_attach_smb_fname(struct files_struct *fsp,
+ struct smb_filename **_smb_fname);
+
/**
* create new fsp to be used for file_new or a durable handle reconnect
*/
* when doing a dos/fcb open, which will then share the file_handle
* across multiple fsps.
*/
- fsp->fh = talloc_zero(mem_ctx, struct fd_handle);
+ fsp->fh = fd_handle_create(mem_ctx);
if (fsp->fh == NULL) {
goto fail;
}
fsp->fsp_flags.use_ofd_locks = false;
#endif
- fsp->fh->ref_count = 1;
+ fh_set_refcount(fsp->fh, 1);
fsp_set_fd(fsp, -1);
fsp->fnum = FNUM_FIELD_INVALID;
conn->num_files_open++;
+ DBG_INFO("allocated files structure (%u used)\n",
+ (unsigned int)sconn->num_files);
+
*result = fsp;
return NT_STATUS_OK;
fh_set_gen_id(fsp->fh, gen_id);
}
-/****************************************************************************
- Find first available file slot.
-****************************************************************************/
-
-NTSTATUS fsp_bind_smb(struct files_struct *fsp, struct smb_request *req)
+/****************************************************************************
+ Find first available file slot.
+****************************************************************************/
+
+NTSTATUS fsp_bind_smb(struct files_struct *fsp, struct smb_request *req)
+{
+ struct smbXsrv_open *op = NULL;
+ NTTIME now;
+ NTSTATUS status;
+
+ if (req == NULL) {
+ DBG_DEBUG("INTERNAL_OPEN_ONLY, skipping smbXsrv_open\n");
+ return NT_STATUS_OK;
+ }
+
+ now = timeval_to_nttime(&fsp->open_time);
+
+ status = smbXsrv_open_create(req->xconn,
+ fsp->conn->session_info,
+ now,
+ &op);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ fsp->op = op;
+ op->compat = fsp;
+ fsp->fnum = op->local_id;
+
+ fsp->mid = req->mid;
+ req->chain_fsp = fsp;
+
+ DBG_DEBUG("fsp [%s] mid [%" PRIu64"]\n",
+ fsp_str_dbg(fsp), fsp->mid);
+
+ return NT_STATUS_OK;
+}
+
+NTSTATUS file_new(struct smb_request *req, connection_struct *conn,
+ files_struct **result)
+{
+ struct smbd_server_connection *sconn = conn->sconn;
+ files_struct *fsp;
+ NTSTATUS status;
+
+ status = fsp_new(conn, conn, &fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ GetTimeOfDay(&fsp->open_time);
+
+ status = fsp_bind_smb(fsp, req);
+ if (!NT_STATUS_IS_OK(status)) {
+ file_free(NULL, fsp);
+ return status;
+ }
+
+ fsp_set_gen_id(fsp);
+
+ /*
+ * Create an smb_filename with "" for the base_name. There are very
+ * few NULL checks, so make sure it's initialized with something. to
+ * be safe until an audit can be done.
+ */
+ fsp->fsp_name = synthetic_smb_fname(fsp,
+ "",
+ NULL,
+ NULL,
+ 0,
+ 0);
+ if (fsp->fsp_name == NULL) {
+ file_free(NULL, fsp);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ DBG_INFO("new file %s\n", fsp_fnum_dbg(fsp));
+
+ /* A new fsp invalidates the positive and
+ negative fsp_fi_cache as the new fsp is pushed
+ at the start of the list and we search from
+ a cache hit to the *end* of the list. */
+
+ ZERO_STRUCT(sconn->fsp_fi_cache);
+
+ *result = fsp;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS create_internal_fsp(connection_struct *conn,
+ const struct smb_filename *smb_fname,
+ struct files_struct **_fsp)
+{
+ struct files_struct *fsp = NULL;
+ NTSTATUS status;
+
+ status = file_new(NULL, conn, &fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ status = fsp_set_smb_fname(fsp, smb_fname);
+ if (!NT_STATUS_IS_OK(status)) {
+ file_free(NULL, fsp);
+ return status;
+ }
+
+ *_fsp = fsp;
+ return NT_STATUS_OK;
+}
+
+/*
+ * Create an internal fsp for an *existing* directory.
+ *
+ * This should only be used by callers in the VFS that need to control the
+ * opening of the directory. Otherwise use open_internal_dirfsp_at().
+ */
+NTSTATUS create_internal_dirfsp(connection_struct *conn,
+ const struct smb_filename *smb_dname,
+ struct files_struct **_fsp)
+{
+ struct files_struct *fsp = NULL;
+ NTSTATUS status;
+
+ status = create_internal_fsp(conn, smb_dname, &fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ fsp->access_mask = FILE_LIST_DIRECTORY;
+ fsp->fsp_flags.is_directory = true;
+ fsp->fsp_flags.is_dirfsp = true;
+
+ *_fsp = fsp;
+ return NT_STATUS_OK;
+}
+
+/*
+ * Open an internal fsp for an *existing* directory.
+ */
+NTSTATUS open_internal_dirfsp(connection_struct *conn,
+ const struct smb_filename *smb_dname,
+ int open_flags,
+ struct files_struct **_fsp)
+{
+ struct files_struct *fsp = NULL;
+ NTSTATUS status;
+
+ status = create_internal_dirfsp(conn, smb_dname, &fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+#ifdef O_DIRECTORY
+ open_flags |= O_DIRECTORY;
+#endif
+ status = fd_openat(conn->cwd_fsp, fsp->fsp_name, fsp, open_flags, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_INFO("Could not open fd for %s (%s)\n",
+ smb_fname_str_dbg(smb_dname),
+ nt_errstr(status));
+ file_free(NULL, fsp);
+ return status;
+ }
+
+ status = vfs_stat_fsp(fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ file_free(NULL, fsp);
+ return status;
+ }
+
+ if (!S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
+ DBG_ERR("%s is not a directory!\n",
+ smb_fname_str_dbg(smb_dname));
+ file_free(NULL, fsp);
+ return NT_STATUS_NOT_A_DIRECTORY;
+ }
+
+ fsp->file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
+
+ *_fsp = fsp;
+ return NT_STATUS_OK;
+}
+
+/*
+ * Convert a pathref dirfsp into a real fsp. No need to do any cwd
+ * tricks, we just open ".".
+ */
+NTSTATUS openat_internal_dir_from_pathref(
+ struct files_struct *dirfsp,
+ int open_flags,
+ struct files_struct **_fsp)
+{
+ struct connection_struct *conn = dirfsp->conn;
+ struct smb_filename *smb_dname = dirfsp->fsp_name;
+ struct files_struct *fsp = NULL;
+ char dot[] = ".";
+ struct smb_filename smb_dot = {
+ .base_name = dot,
+ .flags = smb_dname->flags,
+ .twrp = smb_dname->twrp,
+ };
+ NTSTATUS status;
+
+ status = create_internal_dirfsp(conn, smb_dname, &fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /*
+ * Pointless for opening ".", but you never know...
+ */
+ open_flags |= O_NOFOLLOW;
+
+ status = fd_openat(dirfsp, &smb_dot, fsp, open_flags, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_INFO("fd_openat(\"%s\", \".\") failed: %s\n",
+ fsp_str_dbg(dirfsp),
+ nt_errstr(status));
+ file_free(NULL, fsp);
+ return status;
+ }
+
+ fsp->fsp_name->st = smb_dname->st;
+ fsp->file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
+ *_fsp = fsp;
+ return NT_STATUS_OK;
+}
+
+/*
+ * The "link" in the name doesn't imply link in the filesystem
+ * sense. It's a object that "links" together an fsp and an smb_fname
+ * and the link allocated as talloc child of an fsp.
+ *
+ * The link is created for fsps that openat_pathref_fsp() returns in
+ * smb_fname->fsp. When this fsp is freed by file_free() by some caller
+ * somewhere, the destructor fsp_smb_fname_link_destructor() on the link object
+ * will use the link to reset the reference in smb_fname->fsp that is about to
+ * go away.
+ *
+ * This prevents smb_fname_internal_fsp_destructor() from seeing dangling fsp
+ * pointers.
+ */
+
+struct fsp_smb_fname_link {
+ struct fsp_smb_fname_link **smb_fname_link;
+ struct files_struct **smb_fname_fsp;
+};
+
+static int fsp_smb_fname_link_destructor(struct fsp_smb_fname_link *link)
+{
+ if (link->smb_fname_link == NULL) {
+ return 0;
+ }
+
+ *link->smb_fname_link = NULL;
+ *link->smb_fname_fsp = NULL;
+ return 0;
+}
+
+static NTSTATUS fsp_smb_fname_link(struct files_struct *fsp,
+ struct fsp_smb_fname_link **smb_fname_link,
+ struct files_struct **smb_fname_fsp)
+{
+ struct fsp_smb_fname_link *link = NULL;
+
+ SMB_ASSERT(*smb_fname_link == NULL);
+ SMB_ASSERT(*smb_fname_fsp == NULL);
+
+ link = talloc_zero(fsp, struct fsp_smb_fname_link);
+ if (link == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ link->smb_fname_link = smb_fname_link;
+ link->smb_fname_fsp = smb_fname_fsp;
+ *smb_fname_link = link;
+ *smb_fname_fsp = fsp;
+
+ talloc_set_destructor(link, fsp_smb_fname_link_destructor);
+ return NT_STATUS_OK;
+}
+
+/*
+ * Free a link, carefully avoiding to trigger the link destructor
+ */
+static void destroy_fsp_smb_fname_link(struct fsp_smb_fname_link **_link)
+{
+ struct fsp_smb_fname_link *link = *_link;
+
+ if (link == NULL) {
+ return;
+ }
+ talloc_set_destructor(link, NULL);
+ TALLOC_FREE(link);
+ *_link = NULL;
+}
+
+/*
+ * Talloc destructor set on an smb_fname set by openat_pathref_fsp() used to
+ * close the embedded smb_fname->fsp.
+ */
+static int smb_fname_fsp_destructor(struct smb_filename *smb_fname)
+{
+ struct files_struct *fsp = smb_fname->fsp;
+ NTSTATUS status;
+ int saved_errno = errno;
+
+ destroy_fsp_smb_fname_link(&smb_fname->fsp_link);
+
+ if (fsp == NULL) {
+ errno = saved_errno;
+ return 0;
+ }
+
+ if (fsp_is_alternate_stream(fsp)) {
+ struct files_struct *tmp_base_fsp = fsp->base_fsp;
+
+ fsp_set_base_fsp(fsp, NULL);
+
+ status = fd_close(tmp_base_fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_ERR("Closing fd for fsp [%s] failed: %s. "
+ "Please check your filesystem!!!\n",
+ fsp_str_dbg(fsp), nt_errstr(status));
+ }
+ file_free(NULL, tmp_base_fsp);
+ }
+
+ status = fd_close(fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_ERR("Closing fd for fsp [%s] failed: %s. "
+ "Please check your filesystem!!!\n",
+ fsp_str_dbg(fsp), nt_errstr(status));
+ }
+ file_free(NULL, fsp);
+ smb_fname->fsp = NULL;
+
+ errno = saved_errno;
+ return 0;
+}
+
+static NTSTATUS openat_pathref_fullname(
+ struct connection_struct *conn,
+ const struct files_struct *dirfsp,
+ struct files_struct *basefsp,
+ struct smb_filename **full_fname,
+ struct smb_filename *smb_fname)
+{
+ struct files_struct *fsp = NULL;
+ bool have_dirfsp = (dirfsp != NULL);
+ bool have_basefsp = (basefsp != NULL);
+ NTSTATUS status;
+
+ DBG_DEBUG("smb_fname [%s]\n", smb_fname_str_dbg(smb_fname));
+
+ SMB_ASSERT(smb_fname->fsp == NULL);
+ SMB_ASSERT(have_dirfsp != have_basefsp);
+
+ status = fsp_new(conn, conn, &fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ GetTimeOfDay(&fsp->open_time);
+ fsp_set_gen_id(fsp);
+ ZERO_STRUCT(conn->sconn->fsp_fi_cache);
+
+ fsp->fsp_flags.is_pathref = true;
+
+ status = fsp_attach_smb_fname(fsp, full_fname);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto fail;
+ }
+ fsp_set_base_fsp(fsp, basefsp);
+
+ status = fd_openat(
+ dirfsp, smb_fname, fsp, O_RDONLY|O_NONBLOCK, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+
+ smb_fname->st = fsp->fsp_name->st;
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_PATH_NOT_FOUND) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_STOPPED_ON_SYMLINK))
+ {
+ /*
+ * streams_xattr return NT_STATUS_NOT_FOUND for
+ * opens of not yet existing streams.
+ *
+ * ELOOP maps to NT_STATUS_OBJECT_PATH_NOT_FOUND
+ * and this will result from a open request from
+ * a POSIX client on a symlink.
+ *
+ * NT_STATUS_OBJECT_NAME_NOT_FOUND is the simple
+ * ENOENT case.
+ *
+ * NT_STATUS_STOPPED_ON_SYMLINK is returned when trying
+ * to open a symlink, our callers are not interested in
+ * this.
+ */
+ status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+ goto fail;
+ }
+
+ /*
+ * fd_openat() has done an FSTAT on the handle
+ * so update the smb_fname stat info with "truth".
+ * from the handle.
+ */
+ smb_fname->st = fsp->fsp_name->st;
+
+ fsp->fsp_flags.is_directory = S_ISDIR(fsp->fsp_name->st.st_ex_mode);
+
+ fsp->file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
+
+ status = fsp_smb_fname_link(fsp,
+ &smb_fname->fsp_link,
+ &smb_fname->fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto fail;
+ }
+
+ DBG_DEBUG("fsp [%s]: OK\n", fsp_str_dbg(fsp));
+
+ talloc_set_destructor(smb_fname, smb_fname_fsp_destructor);
+ return NT_STATUS_OK;
+
+fail:
+ DBG_DEBUG("Opening pathref for [%s] failed: %s\n",
+ smb_fname_str_dbg(smb_fname),
+ nt_errstr(status));
+
+ fsp_set_base_fsp(fsp, NULL);
+ fd_close(fsp);
+ file_free(NULL, fsp);
+ return status;
+}
+
+/*
+ * Open an internal O_PATH based fsp for smb_fname. If O_PATH is not
+ * available, open O_RDONLY as root. Both is done in fd_open() ->
+ * non_widelink_open(), triggered by setting fsp->fsp_flags.is_pathref to
+ * true.
+ */
+NTSTATUS openat_pathref_fsp(const struct files_struct *dirfsp,
+ struct smb_filename *smb_fname)
+{
+ connection_struct *conn = dirfsp->conn;
+ struct smb_filename *full_fname = NULL;
+ struct smb_filename *base_fname = NULL;
+ NTSTATUS status;
+
+ DBG_DEBUG("smb_fname [%s]\n", smb_fname_str_dbg(smb_fname));
+
+ if (smb_fname->fsp != NULL) {
+ /* We already have one for this name. */
+ DBG_DEBUG("smb_fname [%s] already has a pathref fsp.\n",
+ smb_fname_str_dbg(smb_fname));
+ return NT_STATUS_OK;
+ }
+
+ if (!(conn->fs_capabilities & FILE_NAMED_STREAMS) ||
+ !is_named_stream(smb_fname)) {
+ /*
+ * openat_pathref_fullname() will make "full_fname" a
+ * talloc child of the smb_fname->fsp. Don't use
+ * talloc_tos() to allocate it to avoid making the
+ * talloc stackframe pool long-lived.
+ */
+ full_fname = full_path_from_dirfsp_atname(
+ conn,
+ dirfsp,
+ smb_fname);
+ if (full_fname == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+ status = openat_pathref_fullname(
+ conn, dirfsp, NULL, &full_fname, smb_fname);
+ TALLOC_FREE(full_fname);
+ return status;
+ }
+
+ /*
+ * stream open
+ */
+ base_fname = cp_smb_filename_nostream(conn, smb_fname);
+ if (base_fname == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ full_fname = full_path_from_dirfsp_atname(
+ conn, /* no talloc_tos(), see comment above */
+ dirfsp,
+ base_fname);
+ if (full_fname == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+
+ status = openat_pathref_fullname(
+ conn, dirfsp, NULL, &full_fname, base_fname);
+ TALLOC_FREE(full_fname);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_DEBUG("openat_pathref_nostream failed: %s\n",
+ nt_errstr(status));
+ goto fail;
+ }
+
+ status = open_stream_pathref_fsp(&base_fname->fsp, smb_fname);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_DEBUG("open_stream_pathref_fsp failed: %s\n",
+ nt_errstr(status));
+ goto fail;
+ }
+
+ smb_fname_fsp_unlink(base_fname);
+fail:
+ TALLOC_FREE(base_fname);
+ return status;
+}
+
+/*
+ * Open a stream given an already opened base_fsp. Avoid
+ * non_widelink_open: This is only valid for the case where we have a
+ * valid non-cwd_fsp dirfsp that we can pass to SMB_VFS_OPENAT()
+ */
+NTSTATUS open_stream_pathref_fsp(
+ struct files_struct **_base_fsp,
+ struct smb_filename *smb_fname)
+{
+ struct files_struct *base_fsp = *_base_fsp;
+ connection_struct *conn = base_fsp->conn;
+ struct smb_filename *base_fname = base_fsp->fsp_name;
+ struct smb_filename *full_fname = NULL;
+ NTSTATUS status;
+
+ SMB_ASSERT(smb_fname->fsp == NULL);
+ SMB_ASSERT(is_named_stream(smb_fname));
+
+ full_fname = synthetic_smb_fname(
+ conn, /* no talloc_tos(), this will be long-lived */
+ base_fname->base_name,
+ smb_fname->stream_name,
+ &smb_fname->st,
+ smb_fname->twrp,
+ smb_fname->flags);
+ if (full_fname == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = openat_pathref_fullname(
+ conn, NULL, base_fsp, &full_fname, smb_fname);
+ TALLOC_FREE(full_fname);
+ return status;
+}
+
+static char *path_to_strv(TALLOC_CTX *mem_ctx, const char *path)
+{
+ char *result = talloc_strdup(mem_ctx, path);
+
+ if (result == NULL) {
+ return NULL;
+ }
+ string_replace(result, '/', '\0');
+ return result;
+}
+
+static NTSTATUS readlink_talloc(
+ TALLOC_CTX *mem_ctx,
+ struct files_struct *dirfsp,
+ struct smb_filename *smb_relname,
+ char **_substitute)
+{
+ char buf[4096];
+ ssize_t ret;
+ char *substitute;
+ NTSTATUS status;
+
+ if (_substitute == NULL) {
+ return NT_STATUS_OK;
+ }
+
+ if (smb_relname == NULL) {
+ /*
+ * We have a Linux O_PATH handle in dirfsp and want to
+ * read its value, essentially a freadlink
+ */
+ smb_relname = synthetic_smb_fname(
+ talloc_tos(), "", NULL, NULL, 0, 0);
+ if (smb_relname == NULL) {
+ DBG_DEBUG("synthetic_smb_fname() failed\n");
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
+
+ ret = SMB_VFS_READLINKAT(
+ dirfsp->conn, dirfsp, smb_relname, buf, sizeof(buf));
+ if (ret < 0) {
+ status = map_nt_error_from_unix(errno);
+ DBG_DEBUG("SMB_VFS_READLINKAT() failed: %s\n",
+ strerror(errno));
+ return status;
+ }
+
+ if ((size_t)ret == sizeof(buf)) {
+ /*
+ * Do we need symlink targets >4k?
+ */
+ DBG_DEBUG("Got full %zu bytes from readlink, too long\n",
+ sizeof(buf));
+ return NT_STATUS_BUFFER_OVERFLOW;
+ }
+
+ substitute = talloc_strndup(mem_ctx, buf, ret);
+ if (substitute == NULL) {
+ DBG_DEBUG("talloc_strndup() failed\n");
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ *_substitute = substitute;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS openat_pathref_dirfsp_nosymlink(
+ TALLOC_CTX *mem_ctx,
+ struct connection_struct *conn,
+ const char *path_in,
+ NTTIME twrp,
+ struct smb_filename **_smb_fname,
+ size_t *unparsed,
+ char **substitute)
+{
+ struct files_struct *dirfsp = conn->cwd_fsp;
+ struct smb_filename full_fname = {
+ .base_name = NULL,
+ .twrp = twrp,
+ };
+ struct smb_filename rel_fname = {
+ .base_name = NULL,
+ .twrp = twrp,
+ };
+ struct smb_filename *result = NULL;
+ struct files_struct *fsp = NULL;
+ char *path = NULL, *next = NULL;
+ int fd;
+ NTSTATUS status;
+ struct vfs_open_how how = {
+ .flags = O_NOFOLLOW|O_DIRECTORY,
+ .mode = 0,
+ };
+
+ DBG_DEBUG("path_in=%s\n", path_in);
+
+ status = fsp_new(conn, conn, &fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_DEBUG("fsp_new() failed: %s\n", nt_errstr(status));
+ goto fail;
+ }
+ fsp->fsp_name = &full_fname;
+
+#ifdef O_PATH
+ /*
+ * Add O_PATH manually, doing this by setting
+ * fsp->fsp_flags.is_pathref will make us become_root() in the
+ * non-O_PATH case, which would cause a security problem.
+ */
+ how.flags |= O_PATH;
+#else
+#ifdef O_SEARCH
+ /*
+ * O_SEARCH just checks for the "x" bit. We are traversing
+ * directories, so we don't need the implicit O_RDONLY ("r"
+ * permissions) but only the "x"-permissions requested by
+ * O_SEARCH. We need either O_PATH or O_SEARCH to correctly
+ * function, without either we will incorrectly require also
+ * the "r" bit when traversing the directory hierarchy.
+ */
+ how.flags |= O_SEARCH;
+#endif
+#endif
+
+ full_fname.base_name = talloc_strdup(talloc_tos(), "");
+ if (full_fname.base_name == NULL) {
+ DBG_DEBUG("talloc_strdup() failed\n");
+ goto nomem;
+ }
+
+ path = path_to_strv(talloc_tos(), path_in);
+ if (path == NULL) {
+ DBG_DEBUG("path_to_strv() failed\n");
+ goto nomem;
+ }
+ rel_fname.base_name = path;
+
+next:
+ next = strv_next(path, rel_fname.base_name);
+
+ if (ISDOT(rel_fname.base_name) || ISDOTDOT(rel_fname.base_name)) {
+ DBG_DEBUG("%s contains a dot\n", path_in);
+ status = NT_STATUS_OBJECT_NAME_INVALID;
+ goto fail;
+ }
+
+ fd = SMB_VFS_OPENAT(
+ conn,
+ dirfsp,
+ &rel_fname,
+ fsp,
+ &how);
+
+ if ((fd == -1) && (errno == ENOENT)) {
+ status = get_real_filename_at(
+ dirfsp,
+ rel_fname.base_name,
+ talloc_tos(),
+ &rel_fname.base_name);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_DEBUG("get_real_filename_at failed: %s\n",
+ nt_errstr(status));
+ goto fail;
+ }
+
+ fd = SMB_VFS_OPENAT(
+ conn,
+ dirfsp,
+ &rel_fname,
+ fsp,
+ &how);
+ }
+
+ if ((fd == -1) && (errno == ENOTDIR)) {
+ status = readlink_talloc(
+ mem_ctx, dirfsp, &rel_fname, substitute);
+
+ if (NT_STATUS_IS_OK(status)) {
+ /*
+ * readlink_talloc() found a symlink
+ */
+ status = NT_STATUS_STOPPED_ON_SYMLINK;
+
+ if (unparsed != NULL) {
+ if (next == NULL) {
+ *unparsed = 0;
+ } else {
+ size_t parsed = next - path;
+ size_t len = talloc_get_size(path);
+ *unparsed = len - parsed;
+ }
+ }
+ } else {
+
+ DBG_DEBUG("readlink_talloc failed: %s\n",
+ nt_errstr(status));
+ /*
+ * Restore the error status from SMB_VFS_OPENAT()
+ */
+ status = NT_STATUS_NOT_A_DIRECTORY;
+ }
+ goto fail;
+ }
+
+ if (fd == -1) {
+ status = map_nt_error_from_unix(errno);
+ DBG_DEBUG("SMB_VFS_OPENAT() failed: %s\n",
+ strerror(errno));
+ goto fail;
+ }
+ fsp_set_fd(fsp, fd);
+
+ fsp->fsp_flags.is_directory = true; /* See O_DIRECTORY above */
+
+ full_fname.base_name = talloc_asprintf_append_buffer(
+ full_fname.base_name,
+ "%s%s",
+ full_fname.base_name[0] == '\0' ? "" : "/",
+ rel_fname.base_name);
+
+ if (full_fname.base_name == NULL) {
+ DBG_DEBUG("talloc_asprintf_append_buffer() failed\n");
+ goto nomem;
+ }
+
+ if (next != NULL) {
+ struct files_struct *tmp = NULL;
+
+ if (dirfsp != conn->cwd_fsp) {
+ fd_close(dirfsp);
+ }
+
+ tmp = dirfsp;
+ dirfsp = fsp;
+
+ if (tmp == conn->cwd_fsp) {
+ status = fsp_new(conn, conn, &fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_DEBUG("fsp_new() failed: %s\n",
+ nt_errstr(status));
+ goto fail;
+ }
+ fsp->fsp_name = &full_fname;
+ } else {
+ fsp = tmp;
+ }
+
+ rel_fname.base_name = next;
+
+ goto next;
+ }
+
+ if (dirfsp != conn->cwd_fsp) {
+ dirfsp->fsp_name = NULL;
+ SMB_ASSERT(fsp_get_pathref_fd(dirfsp) != -1);
+ fd_close(dirfsp);
+ file_free(NULL, dirfsp);
+ dirfsp = NULL;
+ }
+
+ fsp->fsp_flags.is_pathref = true;
+ fsp->fsp_name = NULL;
+
+ status = fsp_set_smb_fname(fsp, &full_fname);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_DEBUG("fsp_set_smb_fname() failed: %s\n",
+ nt_errstr(status));
+ goto fail;
+ }
+
+ status = vfs_stat_fsp(fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_DEBUG("vfs_stat_fsp(%s) failed: %s\n",
+ fsp_str_dbg(fsp),
+ nt_errstr(status));
+ goto fail;
+ }
+ /*
+ * We must correctly set fsp->file_id as code inside
+ * open.c will use this to check if delete_on_close
+ * has been set on the dirfsp.
+ */
+ fsp->file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
+
+ result = cp_smb_filename(mem_ctx, fsp->fsp_name);
+ if (result == NULL) {
+ DBG_DEBUG("cp_smb_filename() failed\n");
+ goto nomem;
+ }
+
+ status = fsp_smb_fname_link(fsp,
+ &result->fsp_link,
+ &result->fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto fail;
+ }
+ talloc_set_destructor(result, smb_fname_fsp_destructor);
+
+ *_smb_fname = result;
+
+ DBG_DEBUG("returning %s\n", smb_fname_str_dbg(result));
+
+ return NT_STATUS_OK;
+
+nomem:
+ status = NT_STATUS_NO_MEMORY;
+fail:
+ if (fsp != NULL) {
+ if (fsp_get_pathref_fd(fsp) != -1) {
+ fd_close(fsp);
+ }
+ file_free(NULL, fsp);
+ fsp = NULL;
+ }
+
+ if ((dirfsp != NULL) && (dirfsp != conn->cwd_fsp)) {
+ dirfsp->fsp_name = NULL;
+ SMB_ASSERT(fsp_get_pathref_fd(dirfsp) != -1);
+ fd_close(dirfsp);
+ file_free(NULL, dirfsp);
+ dirfsp = NULL;
+ }
+
+ TALLOC_FREE(path);
+ return status;
+}
+
+void smb_fname_fsp_unlink(struct smb_filename *smb_fname)
+{
+ talloc_set_destructor(smb_fname, NULL);
+ smb_fname->fsp = NULL;
+ destroy_fsp_smb_fname_link(&smb_fname->fsp_link);
+}
+
+/*
+ * Move any existing embedded fsp refs from the src name to the
+ * destination. It's safe to call this on src smb_fname's that have no embedded
+ * pathref fsp.
+ */
+NTSTATUS move_smb_fname_fsp_link(struct smb_filename *smb_fname_dst,
+ struct smb_filename *smb_fname_src)
{
- struct smbXsrv_open *op = NULL;
- NTTIME now;
NTSTATUS status;
- if (req == NULL) {
- DBG_DEBUG("INTERNAL_OPEN_ONLY, skipping smbXsrv_open\n");
+ /*
+ * The target should always not be linked yet!
+ */
+ SMB_ASSERT(smb_fname_dst->fsp == NULL);
+ SMB_ASSERT(smb_fname_dst->fsp_link == NULL);
+
+ if (smb_fname_src->fsp == NULL) {
return NT_STATUS_OK;
}
- now = timeval_to_nttime(&fsp->open_time);
-
- status = smbXsrv_open_create(req->xconn,
- fsp->conn->session_info,
- now,
- &op);
+ status = fsp_smb_fname_link(smb_fname_src->fsp,
+ &smb_fname_dst->fsp_link,
+ &smb_fname_dst->fsp);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- fsp->op = op;
- op->compat = fsp;
- fsp->fnum = op->local_id;
- fsp->mid = req->mid;
- req->chain_fsp = fsp;
+ talloc_set_destructor(smb_fname_dst, smb_fname_fsp_destructor);
- DBG_DEBUG("fsp [%s] mid [%" PRIu64"]\n",
- fsp_str_dbg(fsp), fsp->mid);
+ smb_fname_fsp_unlink(smb_fname_src);
return NT_STATUS_OK;
}
-NTSTATUS file_new(struct smb_request *req, connection_struct *conn,
- files_struct **result)
+/**
+ * Create an smb_fname and open smb_fname->fsp pathref
+ **/
+NTSTATUS synthetic_pathref(TALLOC_CTX *mem_ctx,
+ struct files_struct *dirfsp,
+ const char *base_name,
+ const char *stream_name,
+ const SMB_STRUCT_STAT *psbuf,
+ NTTIME twrp,
+ uint32_t flags,
+ struct smb_filename **_smb_fname)
{
- struct smbd_server_connection *sconn = conn->sconn;
- files_struct *fsp;
+ struct smb_filename *smb_fname = NULL;
NTSTATUS status;
- status = fsp_new(conn, conn, &fsp);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
+ smb_fname = synthetic_smb_fname(mem_ctx,
+ base_name,
+ stream_name,
+ psbuf,
+ twrp,
+ flags);
+ if (smb_fname == NULL) {
+ return NT_STATUS_NO_MEMORY;
}
- GetTimeOfDay(&fsp->open_time);
-
- status = fsp_bind_smb(fsp, req);
+ status = openat_pathref_fsp(dirfsp, smb_fname);
if (!NT_STATUS_IS_OK(status)) {
- file_free(NULL, fsp);
+ DBG_ERR("opening [%s] failed\n",
+ smb_fname_str_dbg(smb_fname));
+ TALLOC_FREE(smb_fname);
return status;
}
- fsp_set_gen_id(fsp);
-
- /*
- * Create an smb_filename with "" for the base_name. There are very
- * few NULL checks, so make sure it's initialized with something. to
- * be safe until an audit can be done.
- */
- fsp->fsp_name = synthetic_smb_fname(fsp,
- "",
- NULL,
- NULL,
- 0,
- 0);
- if (fsp->fsp_name == NULL) {
- file_free(NULL, fsp);
- return NT_STATUS_NO_MEMORY;
- }
-
- DEBUG(5,("allocated file structure %s (%u used)\n",
- fsp_fnum_dbg(fsp), (unsigned int)sconn->num_files));
-
- /* A new fsp invalidates the positive and
- negative fsp_fi_cache as the new fsp is pushed
- at the start of the list and we search from
- a cache hit to the *end* of the list. */
-
- ZERO_STRUCT(sconn->fsp_fi_cache);
-
- *result = fsp;
+ *_smb_fname = smb_fname;
return NT_STATUS_OK;
}
-/*
- * Create an internal fsp for an *existing* directory.
+static int atname_destructor(struct smb_filename *smb_fname)
+{
+ destroy_fsp_smb_fname_link(&smb_fname->fsp_link);
+ return 0;
+}
+
+/**
+ * Turn a path into a parent pathref and atname
*
- * This should only be used by callers in the VFS that need to control the
- * opening of the directory. Otherwise use open_internal_dirfsp_at().
- */
-NTSTATUS create_internal_dirfsp(connection_struct *conn,
- const struct smb_filename *smb_dname,
- struct files_struct **_fsp)
+ * This returns the parent pathref in _parent and the name relative to it. If
+ * smb_fname was a pathref (ie smb_fname->fsp != NULL), then _atname will be a
+ * pathref as well, ie _atname->fsp will point at the same fsp as
+ * smb_fname->fsp.
+ **/
+NTSTATUS parent_pathref(TALLOC_CTX *mem_ctx,
+ struct files_struct *dirfsp,
+ const struct smb_filename *smb_fname,
+ struct smb_filename **_parent,
+ struct smb_filename **_atname)
{
- struct files_struct *fsp = NULL;
+ struct smb_filename *parent = NULL;
+ struct smb_filename *atname = NULL;
NTSTATUS status;
- status = file_new(NULL, conn, &fsp);
+ status = SMB_VFS_PARENT_PATHNAME(dirfsp->conn,
+ mem_ctx,
+ smb_fname,
+ &parent,
+ &atname);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- status = fsp_set_smb_fname(fsp, smb_dname);
+ /*
+ * We know that the parent name must
+ * exist, and the name has been canonicalized
+ * even if this was a POSIX pathname.
+ * Ensure that we follow symlinks for
+ * the parent. See the torture test
+ * POSIX-SYMLINK-PARENT for details.
+ */
+ parent->flags &= ~SMB_FILENAME_POSIX_PATH;
+
+ status = openat_pathref_fsp(dirfsp, parent);
if (!NT_STATUS_IS_OK(status)) {
- file_free(NULL, fsp);
+ TALLOC_FREE(parent);
return status;
}
- fsp->access_mask = FILE_LIST_DIRECTORY;
- fsp->fsp_flags.is_directory = true;
- fsp->fsp_flags.is_dirfsp = true;
-
- *_fsp = fsp;
+ if (smb_fname->fsp != NULL) {
+ status = fsp_smb_fname_link(smb_fname->fsp,
+ &atname->fsp_link,
+ &atname->fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(parent);
+ return status;
+ }
+ talloc_set_destructor(atname, atname_destructor);
+ }
+ *_parent = parent;
+ *_atname = atname;
return NT_STATUS_OK;
}
-/*
- * Open an internal fsp for an *existing* directory.
- */
-NTSTATUS open_internal_dirfsp(connection_struct *conn,
- const struct smb_filename *smb_dname,
- int open_flags,
- struct files_struct **_fsp)
+static bool close_file_in_loop(struct files_struct *fsp)
{
- struct files_struct *fsp = NULL;
- NTSTATUS status;
- int ret;
+ if (fsp_is_alternate_stream(fsp)) {
+ /*
+ * This is a stream, it can't be a base
+ */
+ SMB_ASSERT(fsp->stream_fsp == NULL);
+ SMB_ASSERT(fsp->base_fsp->stream_fsp == fsp);
- status = create_internal_dirfsp(conn, smb_dname, &fsp);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
+ /*
+ * Remove the base<->stream link so that
+ * close_file_free() does not close fsp->base_fsp as
+ * well. This would destroy walking the linked list of
+ * fsps.
+ */
+ fsp->base_fsp->stream_fsp = NULL;
+ fsp->base_fsp = NULL;
-#ifdef O_DIRECTORY
- open_flags |= O_DIRECTORY;
-#endif
- status = fd_open(fsp, open_flags, 0);
- if (!NT_STATUS_IS_OK(status)) {
- DBG_INFO("Could not open fd for %s (%s)\n",
- smb_fname_str_dbg(smb_dname),
- nt_errstr(status));
- file_free(NULL, fsp);
- return status;
+ close_file_free(NULL, &fsp, SHUTDOWN_CLOSE);
+ return NULL;
}
- ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
- if (ret != 0) {
- return map_nt_error_from_unix(errno);
- }
+ if (fsp->stream_fsp != NULL) {
+ /*
+ * This is the base of a stream.
+ */
+ SMB_ASSERT(fsp->stream_fsp->base_fsp == fsp);
- if (!S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
- DBG_ERR("%s is not a directory!\n",
- smb_fname_str_dbg(smb_dname));
- file_free(NULL, fsp);
- return NT_STATUS_NOT_A_DIRECTORY;
- }
+ /*
+ * Remove the base<->stream link. This will make fsp
+ * look like a normal fsp for the next round.
+ */
+ fsp->stream_fsp->base_fsp = NULL;
+ fsp->stream_fsp = NULL;
- fsp->file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
+ /*
+ * Have us called back a second time. In the second
+ * round, "fsp" now looks like a normal fsp.
+ */
+ return false;
+ }
- *_fsp = fsp;
- return NT_STATUS_OK;
+ close_file_free(NULL, &fsp, SHUTDOWN_CLOSE);
+ return true;
}
/****************************************************************************
Close all open files for a connection.
****************************************************************************/
+struct file_close_conn_state {
+ struct connection_struct *conn;
+ bool fsp_left_behind;
+};
+
+static struct files_struct *file_close_conn_fn(
+ struct files_struct *fsp,
+ void *private_data)
+{
+ struct file_close_conn_state *state = private_data;
+ bool did_close;
+
+ if (fsp->conn != state->conn) {
+ return NULL;
+ }
+
+ if (fsp->op != NULL && fsp->op->global->durable) {
+ /*
+ * A tree disconnect closes a durable handle
+ */
+ fsp->op->global->durable = false;
+ }
+
+ did_close = close_file_in_loop(fsp);
+ if (!did_close) {
+ state->fsp_left_behind = true;
+ }
+
+ return NULL;
+}
+
void file_close_conn(connection_struct *conn)
{
- files_struct *fsp, *next;
+ struct file_close_conn_state state = { .conn = conn };
- for (fsp=conn->sconn->files; fsp; fsp=next) {
- next = fsp->next;
- if (fsp->conn != conn) {
- continue;
- }
- if (fsp->op != NULL && fsp->op->global->durable) {
- /*
- * A tree disconnect closes a durable handle
- */
- fsp->op->global->durable = false;
- }
- close_file(NULL, fsp, SHUTDOWN_CLOSE);
+ files_forall(conn->sconn, file_close_conn_fn, &state);
+
+ if (state.fsp_left_behind) {
+ state.fsp_left_behind = false;
+ files_forall(conn->sconn, file_close_conn_fn, &state);
+ SMB_ASSERT(!state.fsp_left_behind);
}
}
Close files open by a specified vuid.
****************************************************************************/
+struct file_close_user_state {
+ uint64_t vuid;
+ bool fsp_left_behind;
+};
+
+static struct files_struct *file_close_user_fn(
+ struct files_struct *fsp,
+ void *private_data)
+{
+ struct file_close_user_state *state = private_data;
+ bool did_close;
+
+ if (fsp->vuid != state->vuid) {
+ return NULL;
+ }
+
+ did_close = close_file_in_loop(fsp);
+ if (!did_close) {
+ state->fsp_left_behind = true;
+ }
+
+ return NULL;
+}
+
void file_close_user(struct smbd_server_connection *sconn, uint64_t vuid)
{
- files_struct *fsp, *next;
+ struct file_close_user_state state = { .vuid = vuid };
- for (fsp=sconn->files; fsp; fsp=next) {
- next=fsp->next;
- if (fsp->vuid == vuid) {
- close_file(NULL, fsp, SHUTDOWN_CLOSE);
- }
+ files_forall(sconn, file_close_user_fn, &state);
+
+ if (state.fsp_left_behind) {
+ state.fsp_left_behind = false;
+ files_forall(sconn, file_close_user_fn, &state);
+ SMB_ASSERT(!state.fsp_left_behind);
}
}
return NULL;
}
- for (fsp=sconn->files; fsp; fsp=fsp->next,count++) {
- /* We can have a fsp->fh->fd == -1 here as it could be a stat open. */
- if (file_id_equal(&fsp->file_id, &id) &&
- fh_get_gen_id(fsp->fh) == gen_id ) {
- if (count > 10) {
- DLIST_PROMOTE(sconn->files, fsp);
- }
- /* Paranoia check. */
- if ((fsp_get_pathref_fd(fsp) == -1) &&
- (fsp->oplock_type != NO_OPLOCK &&
- fsp->oplock_type != LEASE_OPLOCK)) {
- struct file_id_buf idbuf;
- DEBUG(0,("file_find_dif: file %s file_id = "
- "%s, gen = %u oplock_type = %u is a "
- "stat open with oplock type !\n",
- fsp_str_dbg(fsp),
- file_id_str_buf(fsp->file_id, &idbuf),
- (unsigned int)fh_get_gen_id(fsp->fh),
- (unsigned int)fsp->oplock_type ));
- smb_panic("file_find_dif");
- }
- return fsp;
+ for (fsp = sconn->files; fsp; fsp = fsp->next,count++) {
+ /*
+ * We can have a fsp->fh->fd == -1 here as it could be a stat
+ * open.
+ */
+ if (!file_id_equal(&fsp->file_id, &id)) {
+ continue;
}
+ if (!fsp->fsp_flags.is_fsa) {
+ continue;
+ }
+ if (fh_get_gen_id(fsp->fh) != gen_id) {
+ continue;
+ }
+ if (count > 10) {
+ DLIST_PROMOTE(sconn->files, fsp);
+ }
+ /* Paranoia check. */
+ if ((fsp_get_pathref_fd(fsp) == -1) &&
+ (fsp->oplock_type != NO_OPLOCK &&
+ fsp->oplock_type != LEASE_OPLOCK))
+ {
+ struct file_id_buf idbuf;
+
+ DBG_ERR("file %s file_id = "
+ "%s, gen = %u oplock_type = %u is a "
+ "stat open with oplock type !\n",
+ fsp_str_dbg(fsp),
+ file_id_str_buf(fsp->file_id, &idbuf),
+ (unsigned int)fh_get_gen_id(fsp->fh),
+ (unsigned int)fsp->oplock_type);
+ smb_panic("file_find_dif");
+ }
+ return fsp;
}
return NULL;
****************************************************************************/
files_struct *file_find_di_first(struct smbd_server_connection *sconn,
- struct file_id id)
+ struct file_id id,
+ bool need_fsa)
{
files_struct *fsp;
sconn->fsp_fi_cache.id = id;
for (fsp=sconn->files;fsp;fsp=fsp->next) {
+ if (need_fsa && !fsp->fsp_flags.is_fsa) {
+ continue;
+ }
if (file_id_equal(&fsp->file_id, &id)) {
/* Setup positive cache. */
sconn->fsp_fi_cache.fsp = fsp;
Find the next fsp having the same device and inode.
****************************************************************************/
-files_struct *file_find_di_next(files_struct *start_fsp)
+files_struct *file_find_di_next(files_struct *start_fsp,
+ bool need_fsa)
{
files_struct *fsp;
for (fsp = start_fsp->next;fsp;fsp=fsp->next) {
+ if (need_fsa && !fsp->fsp_flags.is_fsa) {
+ continue;
+ }
if (file_id_equal(&fsp->file_id, &start_fsp->file_id)) {
return fsp;
}
Free up a fsp.
****************************************************************************/
-void fsp_free(files_struct *fsp)
+static void fsp_free(files_struct *fsp)
{
struct smbd_server_connection *sconn = fsp->conn->sconn;
TALLOC_FREE(fsp->fake_file_handle);
- if (fsp->fh->ref_count == 1) {
+ if (fh_get_refcount(fsp->fh) == 1) {
TALLOC_FREE(fsp->fh);
} else {
- fsp->fh->ref_count--;
+ size_t new_refcount = fh_get_refcount(fsp->fh) - 1;
+ fh_set_refcount(fsp->fh, new_refcount);
}
if (fsp->lease != NULL) {
fsp->conn->num_files_open--;
+ if (fsp->fsp_name != NULL &&
+ fsp->fsp_name->fsp_link != NULL)
+ {
+ /*
+ * Free fsp_link of fsp->fsp_name. To do this in the correct
+ * talloc destructor order we have to do it here. The
+ * talloc_free() of the link should set the fsp pointer to NULL.
+ */
+ TALLOC_FREE(fsp->fsp_name->fsp_link);
+ SMB_ASSERT(fsp->fsp_name->fsp == NULL);
+ }
+
/* this is paranoia, just in case someone tries to reuse the
information */
ZERO_STRUCTP(fsp);
TALLOC_FREE(fsp);
}
-void file_free(struct smb_request *req, files_struct *fsp)
+/*
+ * Rundown of all smb-related sub-structures of an fsp
+ */
+void fsp_unbind_smb(struct smb_request *req, files_struct *fsp)
{
- struct smbd_server_connection *sconn = fsp->conn->sconn;
- uint64_t fnum = fsp->fnum;
-
if (fsp == fsp->conn->cwd_fsp) {
return;
}
* pointers in the SMB2 request queue.
*/
remove_smb2_chained_fsp(fsp);
+}
+
+void file_free(struct smb_request *req, files_struct *fsp)
+{
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ uint64_t fnum = fsp->fnum;
+
+ fsp_unbind_smb(req, fsp);
/* Drop all remaining extensions. */
vfs_remove_all_fsp_extensions(fsp);
fsp_free(fsp);
- DEBUG(5,("freed files structure %llu (%u used)\n",
- (unsigned long long)fnum, (unsigned int)sconn->num_files));
+ DBG_INFO("freed files structure %"PRIu64" (%zu used)\n",
+ fnum,
+ sconn->num_files);
}
/****************************************************************************
****************************************************************************/
NTSTATUS dup_file_fsp(
- struct smb_request *req,
files_struct *from,
uint32_t access_mask,
- uint32_t create_options,
files_struct *to)
{
+ size_t new_refcount;
+
/* this can never happen for print files */
SMB_ASSERT(from->print_file == NULL);
TALLOC_FREE(to->fh);
to->fh = from->fh;
- to->fh->ref_count++;
+ new_refcount = fh_get_refcount(to->fh) + 1;
+ fh_set_refcount(to->fh, new_refcount);
to->file_id = from->file_id;
to->initial_allocation_size = from->initial_allocation_size;
to->fsp_flags.modified = from->fsp_flags.modified;
to->fsp_flags.is_directory = from->fsp_flags.is_directory;
to->fsp_flags.aio_write_behind = from->fsp_flags.aio_write_behind;
+ to->fsp_flags.is_fsa = from->fsp_flags.is_fsa;
+ to->fsp_flags.is_pathref = from->fsp_flags.is_pathref;
+ to->fsp_flags.have_proc_fds = from->fsp_flags.have_proc_fds;
+ to->fsp_flags.is_dirfsp = from->fsp_flags.is_dirfsp;
return fsp_set_smb_fname(to, from->fsp_name);
}
/* Set the hash of the full pathname. */
- len = full_path_tos(conn->connectpath, name, tmpbuf, sizeof(tmpbuf),
- &fullpath, &to_free);
+ if (name[0] == '/') {
+ strlcpy(tmpbuf, name, sizeof(tmpbuf));
+ fullpath = tmpbuf;
+ len = strlen(fullpath);
+ to_free = NULL;
+ } else {
+ len = full_path_tos(conn->connectpath,
+ name,
+ tmpbuf,
+ sizeof(tmpbuf),
+ &fullpath,
+ &to_free);
+ }
if (len == -1) {
return NT_STATUS_NO_MEMORY;
}
return NT_STATUS_OK;
}
+static NTSTATUS fsp_attach_smb_fname(struct files_struct *fsp,
+ struct smb_filename **_smb_fname)
+{
+ struct smb_filename *smb_fname_new = talloc_move(fsp, _smb_fname);
+ const char *name_str = NULL;
+ uint32_t name_hash = 0;
+ NTSTATUS status;
+
+ name_str = smb_fname_str_dbg(smb_fname_new);
+ if (name_str == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = file_name_hash(fsp->conn,
+ name_str,
+ &name_hash);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ status = fsp_smb_fname_link(fsp,
+ &smb_fname_new->fsp_link,
+ &smb_fname_new->fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ fsp->name_hash = name_hash;
+ fsp->fsp_name = smb_fname_new;
+ *_smb_fname = NULL;
+ return NT_STATUS_OK;
+}
+
/**
* The only way that the fsp->fsp_name field should ever be set.
*/
NTSTATUS fsp_set_smb_fname(struct files_struct *fsp,
const struct smb_filename *smb_fname_in)
{
- struct smb_filename *smb_fname_new;
+ struct smb_filename *smb_fname_old = fsp->fsp_name;
+ struct smb_filename *smb_fname_new = NULL;
+ NTSTATUS status;
smb_fname_new = cp_smb_filename(fsp, smb_fname_in);
if (smb_fname_new == NULL) {
return NT_STATUS_NO_MEMORY;
}
- TALLOC_FREE(fsp->fsp_name);
- fsp->fsp_name = smb_fname_new;
+ status = fsp_attach_smb_fname(fsp, &smb_fname_new);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(smb_fname_new);
+ return status;
+ }
+
+ if (smb_fname_old != NULL) {
+ smb_fname_fsp_unlink(smb_fname_old);
+ TALLOC_FREE(smb_fname_old);
+ }
- return file_name_hash(fsp->conn,
- smb_fname_str_dbg(fsp->fsp_name),
- &fsp->name_hash);
+ return NT_STATUS_OK;
}
size_t fsp_fullbasepath(struct files_struct *fsp, char *buf, size_t buflen)
*/
if (buf == NULL) {
buf = tmp_buf;
+ SMB_ASSERT(buflen==0);
}
len = snprintf(buf, buflen, "%s/%s", fsp->conn->connectpath,
return len;
}
+
+void fsp_set_base_fsp(struct files_struct *fsp, struct files_struct *base_fsp)
+{
+ SMB_ASSERT(fsp->stream_fsp == NULL);
+ if (base_fsp != NULL) {
+ SMB_ASSERT(base_fsp->base_fsp == NULL);
+ SMB_ASSERT(base_fsp->stream_fsp == NULL);
+ }
+
+ if (fsp->base_fsp != NULL) {
+ SMB_ASSERT(fsp->base_fsp->stream_fsp == fsp);
+ fsp->base_fsp->stream_fsp = NULL;
+ }
+
+ fsp->base_fsp = base_fsp;
+ if (fsp->base_fsp != NULL) {
+ fsp->base_fsp->stream_fsp = fsp;
+ }
+}
+
+bool fsp_is_alternate_stream(const struct files_struct *fsp)
+{
+ return (fsp->base_fsp != NULL);
+}
+
+struct files_struct *metadata_fsp(struct files_struct *fsp)
+{
+ if (fsp_is_alternate_stream(fsp)) {
+ return fsp->base_fsp;
+ }
+ return fsp;
+}
git.samba.org / samba.git / blobdiff