libostree: Start splitting up the monstrous ostree-repo.c
Checkout now lives in its own file.
This commit is contained in:
Colin Walters
parent
5ad0671cd2
commit
dbffd31017
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@ -31,7 +31,9 @@ libostree_la_SOURCES = src/libostree/ostree.h \
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src/libostree/ostree-mutable-tree.c \
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src/libostree/ostree-mutable-tree.h \
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src/libostree/ostree-repo.c \
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src/libostree/ostree-repo-checkout.c \
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src/libostree/ostree-repo.h \
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src/libostree/ostree-repo-private.h \
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src/libostree/ostree-repo-file.c \
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src/libostree/ostree-repo-file.h \
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src/libostree/ostree-repo-file-enumerator.c \
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@ -0,0 +1,826 @@
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
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*
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* Copyright (C) 2011,2013 Colin Walters <walters@verbum.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Author: Colin Walters <walters@verbum.org>
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*/
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#include "config.h"
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#include "ostree-repo-file.h"
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#include "ostree-repo-private.h"
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static gboolean
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checkout_file_from_input (GFile *file,
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OstreeRepoCheckoutMode mode,
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OstreeRepoCheckoutOverwriteMode overwrite_mode,
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GFileInfo *finfo,
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GVariant *xattrs,
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GInputStream *input,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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GError *temp_error = NULL;
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gs_unref_object GFile *dir = NULL;
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gs_unref_object GFile *temp_file = NULL;
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gs_unref_object GFileInfo *temp_info = NULL;
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if (mode == OSTREE_REPO_CHECKOUT_MODE_USER)
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{
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temp_info = g_file_info_dup (finfo);
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g_file_info_set_attribute_uint32 (temp_info, "unix::uid", geteuid ());
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g_file_info_set_attribute_uint32 (temp_info, "unix::gid", getegid ());
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xattrs = NULL;
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}
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else
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temp_info = g_object_ref (finfo);
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if (overwrite_mode == OSTREE_REPO_CHECKOUT_OVERWRITE_UNION_FILES)
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{
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if (g_file_info_get_file_type (temp_info) == G_FILE_TYPE_DIRECTORY)
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{
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if (!ostree_create_file_from_input (file, temp_info,
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xattrs, input,
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cancellable, &temp_error))
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{
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if (g_error_matches (temp_error, G_IO_ERROR, G_IO_ERROR_EXISTS))
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{
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g_clear_error (&temp_error);
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}
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else
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{
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g_propagate_error (error, temp_error);
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goto out;
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}
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}
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}
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else
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{
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dir = g_file_get_parent (file);
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if (!ostree_create_temp_file_from_input (dir, NULL, "checkout",
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temp_info, xattrs, input, &temp_file,
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cancellable, error))
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goto out;
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if (g_file_info_get_file_type (temp_info) == G_FILE_TYPE_REGULAR)
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{
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if (!gs_file_sync_data (temp_file, cancellable, error))
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goto out;
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}
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if (rename (gs_file_get_path_cached (temp_file), gs_file_get_path_cached (file)) < 0)
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{
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ot_util_set_error_from_errno (error, errno);
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goto out;
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}
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}
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}
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else
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{
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if (!ostree_create_file_from_input (file, temp_info,
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xattrs, input, cancellable, error))
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goto out;
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if (g_file_info_get_file_type (temp_info) == G_FILE_TYPE_REGULAR)
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{
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if (!gs_file_sync_data (file, cancellable, error))
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goto out;
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}
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}
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ret = TRUE;
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out:
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return ret;
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}
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static gboolean
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checkout_file_hardlink (OstreeRepo *self,
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OstreeRepoCheckoutMode mode,
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OstreeRepoCheckoutOverwriteMode overwrite_mode,
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GFile *source,
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GFile *destination,
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int dirfd,
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gboolean *out_was_supported,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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gboolean ret_was_supported = FALSE;
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gs_unref_object GFile *dir = NULL;
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again:
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if (dirfd != -1 &&
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linkat (-1, gs_file_get_path_cached (source),
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dirfd, gs_file_get_basename_cached (destination), 0) != -1)
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ret_was_supported = TRUE;
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else if (link (gs_file_get_path_cached (source), gs_file_get_path_cached (destination)) != -1)
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ret_was_supported = TRUE;
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else if (errno == EMLINK || errno == EXDEV || errno == EPERM)
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{
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/* EMLINK, EXDEV and EPERM shouldn't be fatal; we just can't do the
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* optimization of hardlinking instead of copying.
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*/
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ret_was_supported = FALSE;
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}
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else if (errno == EEXIST && overwrite_mode == OSTREE_REPO_CHECKOUT_OVERWRITE_UNION_FILES)
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{
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/* Idiocy, from man rename(2)
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*
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* "If oldpath and newpath are existing hard links referring to
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* the same file, then rename() does nothing, and returns a
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* success status."
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*
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* So we can't make this atomic.
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*/
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(void) unlink (gs_file_get_path_cached (destination));
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goto again;
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ret_was_supported = TRUE;
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}
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else
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{
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ot_util_set_error_from_errno (error, errno);
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goto out;
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}
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ret = TRUE;
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if (out_was_supported)
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*out_was_supported = ret_was_supported;
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out:
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return ret;
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}
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static gboolean
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find_loose_for_checkout (OstreeRepo *self,
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const char *checksum,
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GFile **out_loose_path,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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gs_unref_object GFile *path = NULL;
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struct stat stbuf;
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do
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{
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switch (self->mode)
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{
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case OSTREE_REPO_MODE_BARE:
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path = ostree_repo_get_object_path (self, checksum, OSTREE_OBJECT_TYPE_FILE);
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break;
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case OSTREE_REPO_MODE_ARCHIVE:
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path = ostree_repo_get_archive_content_path (self, checksum);
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break;
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case OSTREE_REPO_MODE_ARCHIVE_Z2:
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{
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if (self->enable_uncompressed_cache)
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path = _ostree_repo_get_uncompressed_object_cache_path (self, checksum);
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else
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path = NULL;
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}
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break;
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}
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if (!path)
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{
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self = self->parent_repo;
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continue;
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}
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if (lstat (gs_file_get_path_cached (path), &stbuf) < 0)
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{
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if (errno != ENOENT)
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{
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ot_util_set_error_from_errno (error, errno);
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goto out;
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}
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self = self->parent_repo;
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}
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else if (S_ISLNK (stbuf.st_mode))
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{
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/* Don't check out symbolic links via hardlink; it's very easy
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* to hit the maximum number of hardlinks to an inode this way,
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* especially since right now we have a lot of symbolic links to
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* busybox.
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*
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* fs/ext4/ext4.h:#define EXT4_LINK_MAX 65000
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*/
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self = self->parent_repo;
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}
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else
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break;
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g_clear_object (&path);
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} while (self != NULL);
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ret = TRUE;
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ot_transfer_out_value (out_loose_path, &path);
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out:
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return ret;
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}
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typedef struct {
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OstreeRepo *repo;
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OstreeRepoCheckoutMode mode;
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OstreeRepoCheckoutOverwriteMode overwrite_mode;
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GFile *destination;
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int dirfd;
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OstreeRepoFile *source;
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GFileInfo *source_info;
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GCancellable *cancellable;
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gboolean caught_error;
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GError *error;
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GSimpleAsyncResult *result;
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} CheckoutOneFileAsyncData;
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static void
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checkout_file_async_data_free (gpointer data)
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{
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CheckoutOneFileAsyncData *checkout_data = data;
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g_clear_object (&checkout_data->repo);
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g_clear_object (&checkout_data->destination);
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g_clear_object (&checkout_data->source);
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g_clear_object (&checkout_data->source_info);
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g_clear_object (&checkout_data->cancellable);
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g_free (checkout_data);
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}
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static void
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checkout_file_thread (GSimpleAsyncResult *result,
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GObject *src,
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GCancellable *cancellable)
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{
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const char *checksum;
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OstreeRepo *repo;
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gboolean is_symlink;
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gboolean hardlink_supported;
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GError *local_error = NULL;
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GError **error = &local_error;
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gs_unref_object GFile *loose_path = NULL;
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gs_unref_object GInputStream *input = NULL;
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gs_unref_variant GVariant *xattrs = NULL;
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CheckoutOneFileAsyncData *checkout_data;
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checkout_data = g_simple_async_result_get_op_res_gpointer (result);
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repo = checkout_data->repo;
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/* Hack to avoid trying to create device files as a user */
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if (checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_USER
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&& g_file_info_get_file_type (checkout_data->source_info) == G_FILE_TYPE_SPECIAL)
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goto out;
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is_symlink = g_file_info_get_file_type (checkout_data->source_info) == G_FILE_TYPE_SYMBOLIC_LINK;
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checksum = ostree_repo_file_get_checksum ((OstreeRepoFile*)checkout_data->source);
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/* We can only do hardlinks in these scenarios */
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if (!is_symlink &&
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((checkout_data->repo->mode == OSTREE_REPO_MODE_BARE && checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_NONE)
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|| (checkout_data->repo->mode == OSTREE_REPO_MODE_ARCHIVE && checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_USER)
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|| (checkout_data->repo->mode == OSTREE_REPO_MODE_ARCHIVE_Z2 && checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_USER)))
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{
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if (!find_loose_for_checkout (checkout_data->repo, checksum, &loose_path,
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cancellable, error))
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goto out;
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}
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/* Also, if we're archive-z and we didn't find an object, uncompress it now,
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* stick it in the cache, and then hardlink to that.
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*/
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if (!is_symlink
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&& loose_path == NULL
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&& repo->mode == OSTREE_REPO_MODE_ARCHIVE_Z2
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&& checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_USER
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&& repo->enable_uncompressed_cache)
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{
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gs_unref_object GFile *objdir = NULL;
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loose_path = _ostree_repo_get_uncompressed_object_cache_path (repo, checksum);
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if (!ostree_repo_load_file (repo, checksum, &input, NULL, &xattrs,
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cancellable, error))
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goto out;
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objdir = g_file_get_parent (loose_path);
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if (!gs_file_ensure_directory (objdir, TRUE, cancellable, error))
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{
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g_prefix_error (error, "Creating cache directory %s: ",
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gs_file_get_path_cached (objdir));
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goto out;
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}
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/* Use UNION_FILES to make this last-one-wins thread behavior
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* for now; we lose deduplication potentially, but oh well
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*/
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if (!checkout_file_from_input (loose_path,
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OSTREE_REPO_CHECKOUT_MODE_USER,
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OSTREE_REPO_CHECKOUT_OVERWRITE_UNION_FILES,
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checkout_data->source_info, xattrs,
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input, cancellable, error))
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{
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g_prefix_error (error, "Unpacking loose object %s: ", checksum);
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goto out;
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}
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/* Store the 2-byte objdir prefix (e.g. e3) in a set. The basic
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* idea here is that if we had to unpack an object, it's very
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* likely we're replacing some other object, so we may need a GC.
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*
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* This model ensures that we do work roughly proportional to
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* the size of the changes. For example, we don't scan any
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* directories if we didn't modify anything, meaning you can
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* checkout the same tree multiple times very quickly.
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*
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* This is also scale independent; we don't hardcode e.g. looking
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* at 1000 objects.
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*
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* The downside is that if we're unlucky, we may not free
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* an object for quite some time.
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*/
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g_mutex_lock (&repo->cache_lock);
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{
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gpointer key = GUINT_TO_POINTER ((g_ascii_xdigit_value (checksum[0]) << 4) +
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g_ascii_xdigit_value (checksum[1]));
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if (repo->updated_uncompressed_dirs == NULL)
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repo->updated_uncompressed_dirs = g_hash_table_new (NULL, NULL);
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g_hash_table_insert (repo->updated_uncompressed_dirs, key, key);
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}
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g_mutex_unlock (&repo->cache_lock);
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}
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if (loose_path)
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{
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/* If we found one, try hardlinking */
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if (!checkout_file_hardlink (checkout_data->repo, checkout_data->mode,
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checkout_data->overwrite_mode, loose_path,
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checkout_data->destination, checkout_data->dirfd,
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&hardlink_supported, cancellable, error))
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{
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g_prefix_error (error, "Hardlinking loose object %s to %s: ", checksum,
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gs_file_get_path_cached (checkout_data->destination));
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goto out;
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}
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}
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/* Fall back to copy if there's no loose object, or we couldn't hardlink */
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if (loose_path == NULL || !hardlink_supported)
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{
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if (!ostree_repo_load_file (checkout_data->repo, checksum, &input, NULL, &xattrs,
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cancellable, error))
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goto out;
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if (!checkout_file_from_input (checkout_data->destination,
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checkout_data->mode,
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checkout_data->overwrite_mode,
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checkout_data->source_info, xattrs,
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input, cancellable, error))
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{
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g_prefix_error (error, "Copying object %s to %s: ", checksum,
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gs_file_get_path_cached (checkout_data->destination));
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goto out;
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}
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}
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out:
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if (local_error)
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g_simple_async_result_take_error (result, local_error);
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}
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static void
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checkout_one_file_async (OstreeRepo *self,
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OstreeRepoCheckoutMode mode,
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OstreeRepoCheckoutOverwriteMode overwrite_mode,
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OstreeRepoFile *source,
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GFileInfo *source_info,
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GFile *destination,
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int dirfd,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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CheckoutOneFileAsyncData *checkout_data;
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checkout_data = g_new0 (CheckoutOneFileAsyncData, 1);
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checkout_data->repo = g_object_ref (self);
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checkout_data->mode = mode;
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checkout_data->overwrite_mode = overwrite_mode;
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checkout_data->destination = g_object_ref (destination);
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checkout_data->dirfd = dirfd;
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checkout_data->source = g_object_ref (source);
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checkout_data->source_info = g_object_ref (source_info);
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checkout_data->cancellable = cancellable ? g_object_ref (cancellable) : NULL;
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checkout_data->result = g_simple_async_result_new ((GObject*) self,
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callback, user_data,
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checkout_one_file_async);
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g_simple_async_result_set_op_res_gpointer (checkout_data->result, checkout_data,
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checkout_file_async_data_free);
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g_simple_async_result_run_in_thread (checkout_data->result,
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checkout_file_thread, G_PRIORITY_DEFAULT,
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cancellable);
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g_object_unref (checkout_data->result);
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}
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static gboolean
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checkout_one_file_finish (OstreeRepo *self,
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GAsyncResult *result,
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GError **error)
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{
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||||
GSimpleAsyncResult *simple;
|
||||
|
||||
g_return_val_if_fail (g_simple_async_result_is_valid (result, (GObject*)self, checkout_one_file_async), FALSE);
|
||||
|
||||
simple = G_SIMPLE_ASYNC_RESULT (result);
|
||||
if (g_simple_async_result_propagate_error (simple, error))
|
||||
return FALSE;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
typedef struct {
|
||||
OstreeRepo *repo;
|
||||
OstreeRepoCheckoutMode mode;
|
||||
OstreeRepoCheckoutOverwriteMode overwrite_mode;
|
||||
GFile *destination;
|
||||
OstreeRepoFile *source;
|
||||
GFileInfo *source_info;
|
||||
GCancellable *cancellable;
|
||||
|
||||
gboolean caught_error;
|
||||
GError *error;
|
||||
|
||||
DIR *dir_handle;
|
||||
|
||||
gboolean dir_enumeration_complete;
|
||||
guint pending_ops;
|
||||
guint pending_file_ops;
|
||||
GPtrArray *pending_dirs;
|
||||
GMainLoop *loop;
|
||||
GSimpleAsyncResult *result;
|
||||
} CheckoutTreeAsyncData;
|
||||
|
||||
static void
|
||||
checkout_tree_async_data_free (gpointer data)
|
||||
{
|
||||
CheckoutTreeAsyncData *checkout_data = data;
|
||||
|
||||
g_clear_object (&checkout_data->repo);
|
||||
g_clear_object (&checkout_data->destination);
|
||||
g_clear_object (&checkout_data->source);
|
||||
g_clear_object (&checkout_data->source_info);
|
||||
g_clear_object (&checkout_data->cancellable);
|
||||
if (checkout_data->pending_dirs)
|
||||
g_ptr_array_unref (checkout_data->pending_dirs);
|
||||
if (checkout_data->dir_handle)
|
||||
(void) closedir (checkout_data->dir_handle);
|
||||
g_free (checkout_data);
|
||||
}
|
||||
|
||||
static void
|
||||
on_tree_async_child_op_complete (CheckoutTreeAsyncData *data,
|
||||
GError *local_error)
|
||||
{
|
||||
data->pending_ops--;
|
||||
|
||||
if (local_error)
|
||||
{
|
||||
if (!data->caught_error)
|
||||
{
|
||||
data->caught_error = TRUE;
|
||||
g_propagate_error (&data->error, local_error);
|
||||
}
|
||||
else
|
||||
g_clear_error (&local_error);
|
||||
}
|
||||
|
||||
if (data->pending_ops != 0)
|
||||
return;
|
||||
|
||||
if (data->caught_error)
|
||||
g_simple_async_result_take_error (data->result, data->error);
|
||||
g_simple_async_result_complete_in_idle (data->result);
|
||||
g_object_unref (data->result);
|
||||
}
|
||||
|
||||
static void
|
||||
on_one_subdir_checked_out (GObject *src,
|
||||
GAsyncResult *result,
|
||||
gpointer user_data)
|
||||
{
|
||||
CheckoutTreeAsyncData *data = user_data;
|
||||
GError *local_error = NULL;
|
||||
|
||||
if (!ostree_repo_checkout_tree_finish ((OstreeRepo*) src, result, &local_error))
|
||||
goto out;
|
||||
|
||||
out:
|
||||
on_tree_async_child_op_complete (data, local_error);
|
||||
}
|
||||
|
||||
static void
|
||||
process_pending_dirs (CheckoutTreeAsyncData *data)
|
||||
{
|
||||
guint i;
|
||||
|
||||
g_assert (data->dir_enumeration_complete);
|
||||
g_assert (data->pending_file_ops == 0);
|
||||
|
||||
/* Don't hold a FD open while we're processing
|
||||
* recursive calls, otherwise we can pretty easily
|
||||
* hit the max of 1024 fds =(
|
||||
*/
|
||||
if (data->dir_handle)
|
||||
{
|
||||
(void) closedir (data->dir_handle);
|
||||
data->dir_handle = NULL;
|
||||
}
|
||||
|
||||
if (data->pending_dirs != NULL)
|
||||
{
|
||||
for (i = 0; i < data->pending_dirs->len; i++)
|
||||
{
|
||||
GFileInfo *file_info = data->pending_dirs->pdata[i];
|
||||
const char *name;
|
||||
gs_unref_object GFile *dest_path = NULL;
|
||||
gs_unref_object GFile *src_child = NULL;
|
||||
|
||||
name = g_file_info_get_attribute_byte_string (file_info, "standard::name");
|
||||
|
||||
dest_path = g_file_get_child (data->destination, name);
|
||||
src_child = g_file_get_child ((GFile*)data->source, name);
|
||||
|
||||
ostree_repo_checkout_tree_async (data->repo,
|
||||
data->mode,
|
||||
data->overwrite_mode,
|
||||
dest_path, (OstreeRepoFile*)src_child, file_info,
|
||||
data->cancellable,
|
||||
on_one_subdir_checked_out,
|
||||
data);
|
||||
data->pending_ops++;
|
||||
}
|
||||
g_ptr_array_set_size (data->pending_dirs, 0);
|
||||
on_tree_async_child_op_complete (data, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
on_one_file_checked_out (GObject *src,
|
||||
GAsyncResult *result,
|
||||
gpointer user_data)
|
||||
{
|
||||
CheckoutTreeAsyncData *data = user_data;
|
||||
GError *local_error = NULL;
|
||||
|
||||
if (!checkout_one_file_finish ((OstreeRepo*) src, result, &local_error))
|
||||
goto out;
|
||||
|
||||
out:
|
||||
data->pending_file_ops--;
|
||||
if (data->dir_enumeration_complete && data->pending_file_ops == 0)
|
||||
process_pending_dirs (data);
|
||||
on_tree_async_child_op_complete (data, local_error);
|
||||
}
|
||||
|
||||
static void
|
||||
on_got_next_files (GObject *src,
|
||||
GAsyncResult *result,
|
||||
gpointer user_data)
|
||||
{
|
||||
CheckoutTreeAsyncData *data = user_data;
|
||||
GError *local_error = NULL;
|
||||
GList *files = NULL;
|
||||
GList *iter = NULL;
|
||||
|
||||
files = g_file_enumerator_next_files_finish ((GFileEnumerator*) src, result, &local_error);
|
||||
if (local_error)
|
||||
goto out;
|
||||
|
||||
if (!files)
|
||||
data->dir_enumeration_complete = TRUE;
|
||||
else
|
||||
{
|
||||
g_file_enumerator_next_files_async ((GFileEnumerator*)src, 50, G_PRIORITY_DEFAULT,
|
||||
data->cancellable,
|
||||
on_got_next_files, data);
|
||||
data->pending_ops++;
|
||||
}
|
||||
|
||||
if (data->dir_enumeration_complete && data->pending_file_ops == 0)
|
||||
process_pending_dirs (data);
|
||||
|
||||
for (iter = files; iter; iter = iter->next)
|
||||
{
|
||||
GFileInfo *file_info = iter->data;
|
||||
const char *name;
|
||||
guint32 type;
|
||||
|
||||
name = g_file_info_get_attribute_byte_string (file_info, "standard::name");
|
||||
type = g_file_info_get_attribute_uint32 (file_info, "standard::type");
|
||||
|
||||
if (type != G_FILE_TYPE_DIRECTORY)
|
||||
{
|
||||
gs_unref_object GFile *dest_path = NULL;
|
||||
gs_unref_object GFile *src_child = NULL;
|
||||
|
||||
dest_path = g_file_get_child (data->destination, name);
|
||||
src_child = g_file_get_child ((GFile*)data->source, name);
|
||||
|
||||
checkout_one_file_async (data->repo, data->mode,
|
||||
data->overwrite_mode,
|
||||
(OstreeRepoFile*)src_child, file_info,
|
||||
dest_path, dirfd(data->dir_handle),
|
||||
data->cancellable, on_one_file_checked_out,
|
||||
data);
|
||||
data->pending_file_ops++;
|
||||
data->pending_ops++;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (data->pending_dirs == NULL)
|
||||
{
|
||||
data->pending_dirs = g_ptr_array_new_with_free_func ((GDestroyNotify) g_object_unref);
|
||||
data->pending_ops++;
|
||||
}
|
||||
g_ptr_array_add (data->pending_dirs, g_object_ref (file_info));
|
||||
}
|
||||
g_object_unref (file_info);
|
||||
}
|
||||
|
||||
g_list_free (files);
|
||||
|
||||
out:
|
||||
on_tree_async_child_op_complete (data, local_error);
|
||||
}
|
||||
|
||||
void
|
||||
ostree_repo_checkout_tree_async (OstreeRepo *self,
|
||||
OstreeRepoCheckoutMode mode,
|
||||
OstreeRepoCheckoutOverwriteMode overwrite_mode,
|
||||
GFile *destination,
|
||||
OstreeRepoFile *source,
|
||||
GFileInfo *source_info,
|
||||
GCancellable *cancellable,
|
||||
GAsyncReadyCallback callback,
|
||||
gpointer user_data)
|
||||
{
|
||||
CheckoutTreeAsyncData *checkout_data;
|
||||
gs_unref_object GFileInfo *file_info = NULL;
|
||||
gs_unref_variant GVariant *xattrs = NULL;
|
||||
gs_unref_object GFileEnumerator *dir_enum = NULL;
|
||||
GError *local_error = NULL;
|
||||
GError **error = &local_error;
|
||||
|
||||
checkout_data = g_new0 (CheckoutTreeAsyncData, 1);
|
||||
checkout_data->repo = g_object_ref (self);
|
||||
checkout_data->mode = mode;
|
||||
checkout_data->overwrite_mode = overwrite_mode;
|
||||
checkout_data->destination = g_object_ref (destination);
|
||||
checkout_data->source = g_object_ref (source);
|
||||
checkout_data->source_info = g_object_ref (source_info);
|
||||
checkout_data->cancellable = cancellable ? g_object_ref (cancellable) : NULL;
|
||||
checkout_data->pending_ops++; /* Count this function */
|
||||
|
||||
checkout_data->result = g_simple_async_result_new ((GObject*) self,
|
||||
callback, user_data,
|
||||
ostree_repo_checkout_tree_async);
|
||||
|
||||
g_simple_async_result_set_op_res_gpointer (checkout_data->result, checkout_data,
|
||||
checkout_tree_async_data_free);
|
||||
|
||||
if (!ostree_repo_file_get_xattrs (checkout_data->source, &xattrs, NULL, error))
|
||||
goto out;
|
||||
|
||||
if (!checkout_file_from_input (checkout_data->destination,
|
||||
checkout_data->mode,
|
||||
checkout_data->overwrite_mode,
|
||||
checkout_data->source_info,
|
||||
xattrs, NULL,
|
||||
cancellable, error))
|
||||
goto out;
|
||||
|
||||
checkout_data->dir_handle = opendir (gs_file_get_path_cached (checkout_data->destination));
|
||||
if (!checkout_data->dir_handle)
|
||||
{
|
||||
ot_util_set_error_from_errno (error, errno);
|
||||
goto out;
|
||||
}
|
||||
|
||||
g_clear_pointer (&xattrs, (GDestroyNotify) g_variant_unref);
|
||||
|
||||
dir_enum = g_file_enumerate_children ((GFile*)checkout_data->source,
|
||||
OSTREE_GIO_FAST_QUERYINFO,
|
||||
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
|
||||
cancellable,
|
||||
error);
|
||||
if (!dir_enum)
|
||||
goto out;
|
||||
|
||||
g_file_enumerator_next_files_async (dir_enum, 50, G_PRIORITY_DEFAULT, cancellable,
|
||||
on_got_next_files, checkout_data);
|
||||
checkout_data->pending_ops++;
|
||||
|
||||
out:
|
||||
on_tree_async_child_op_complete (checkout_data, local_error);
|
||||
}
|
||||
|
||||
gboolean
|
||||
ostree_repo_checkout_tree_finish (OstreeRepo *self,
|
||||
GAsyncResult *result,
|
||||
GError **error)
|
||||
{
|
||||
GSimpleAsyncResult *simple;
|
||||
|
||||
g_return_val_if_fail (g_simple_async_result_is_valid (result, (GObject*)self, ostree_repo_checkout_tree_async), FALSE);
|
||||
|
||||
simple = G_SIMPLE_ASYNC_RESULT (result);
|
||||
if (g_simple_async_result_propagate_error (simple, error))
|
||||
return FALSE;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/**
|
||||
* ostree_repo_checkout_gc:
|
||||
*
|
||||
* Call this after finishing a succession of checkout operations; it
|
||||
* will delete any currently-unused uncompressed objects from the
|
||||
* cache.
|
||||
*/
|
||||
gboolean
|
||||
ostree_repo_checkout_gc (OstreeRepo *self,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
gboolean ret = FALSE;
|
||||
gs_unref_hashtable GHashTable *to_clean_dirs = NULL;
|
||||
GHashTableIter iter;
|
||||
gpointer key, value;
|
||||
|
||||
g_mutex_lock (&self->cache_lock);
|
||||
to_clean_dirs = self->updated_uncompressed_dirs;
|
||||
self->updated_uncompressed_dirs = g_hash_table_new (NULL, NULL);
|
||||
g_mutex_unlock (&self->cache_lock);
|
||||
|
||||
if (to_clean_dirs)
|
||||
g_hash_table_iter_init (&iter, to_clean_dirs);
|
||||
while (to_clean_dirs && g_hash_table_iter_next (&iter, &key, &value))
|
||||
{
|
||||
gs_unref_object GFile *objdir = NULL;
|
||||
gs_unref_object GFileEnumerator *enumerator = NULL;
|
||||
gs_free char *objdir_name = NULL;
|
||||
|
||||
objdir_name = g_strdup_printf ("%02x", GPOINTER_TO_UINT (key));
|
||||
objdir = ot_gfile_get_child_build_path (self->uncompressed_objects_dir, "objects",
|
||||
objdir_name, NULL);
|
||||
|
||||
enumerator = g_file_enumerate_children (objdir, "standard::name,standard::type,unix::inode,unix::nlink",
|
||||
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
|
||||
cancellable,
|
||||
error);
|
||||
if (!enumerator)
|
||||
goto out;
|
||||
|
||||
while (TRUE)
|
||||
{
|
||||
GFileInfo *file_info;
|
||||
guint32 nlinks;
|
||||
|
||||
if (!gs_file_enumerator_iterate (enumerator, &file_info, NULL,
|
||||
cancellable, error))
|
||||
goto out;
|
||||
if (file_info == NULL)
|
||||
break;
|
||||
|
||||
nlinks = g_file_info_get_attribute_uint32 (file_info, "unix::nlink");
|
||||
if (nlinks == 1)
|
||||
{
|
||||
gs_unref_object GFile *objpath = NULL;
|
||||
objpath = g_file_get_child (objdir, g_file_info_get_name (file_info));
|
||||
if (!gs_file_unlink (objpath, cancellable, error))
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ret = TRUE;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -0,0 +1,63 @@
|
|||
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
|
||||
*
|
||||
* Copyright (C) 2011,2013 Colin Walters <walters@verbum.org>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the
|
||||
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||
* Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "ostree-repo.h"
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
struct OstreeRepo {
|
||||
GObject parent;
|
||||
|
||||
GFile *repodir;
|
||||
GFile *tmp_dir;
|
||||
GFile *pending_dir;
|
||||
GFile *local_heads_dir;
|
||||
GFile *remote_heads_dir;
|
||||
GFile *objects_dir;
|
||||
GFile *uncompressed_objects_dir;
|
||||
GFile *remote_cache_dir;
|
||||
GFile *config_file;
|
||||
|
||||
GFile *transaction_lock_path;
|
||||
|
||||
GMutex cache_lock;
|
||||
GPtrArray *cached_meta_indexes;
|
||||
GPtrArray *cached_content_indexes;
|
||||
|
||||
gboolean inited;
|
||||
gboolean in_transaction;
|
||||
GHashTable *loose_object_devino_hash;
|
||||
GHashTable *updated_uncompressed_dirs;
|
||||
|
||||
GKeyFile *config;
|
||||
OstreeRepoMode mode;
|
||||
gboolean enable_uncompressed_cache;
|
||||
|
||||
OstreeRepo *parent_repo;
|
||||
};
|
||||
|
||||
GFile *
|
||||
_ostree_repo_get_uncompressed_object_cache_path (OstreeRepo *self,
|
||||
const char *checksum);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
|
|
@ -24,7 +24,9 @@
|
|||
|
||||
#include "config.h"
|
||||
|
||||
#include "ostree.h"
|
||||
#include "ostree-repo-private.h"
|
||||
#include "ostree-mutable-tree.h"
|
||||
#include "ostree-checksum-input-stream.h"
|
||||
#include "otutil.h"
|
||||
#include "ostree-repo-file-enumerator.h"
|
||||
|
||||
|
|
@ -41,37 +43,6 @@
|
|||
#include "ostree-libarchive-input-stream.h"
|
||||
#endif
|
||||
|
||||
struct OstreeRepo {
|
||||
GObject parent;
|
||||
|
||||
GFile *repodir;
|
||||
GFile *tmp_dir;
|
||||
GFile *pending_dir;
|
||||
GFile *local_heads_dir;
|
||||
GFile *remote_heads_dir;
|
||||
GFile *objects_dir;
|
||||
GFile *uncompressed_objects_dir;
|
||||
GFile *remote_cache_dir;
|
||||
GFile *config_file;
|
||||
|
||||
GFile *transaction_lock_path;
|
||||
|
||||
GMutex cache_lock;
|
||||
GPtrArray *cached_meta_indexes;
|
||||
GPtrArray *cached_content_indexes;
|
||||
|
||||
gboolean inited;
|
||||
gboolean in_transaction;
|
||||
GHashTable *loose_object_devino_hash;
|
||||
GHashTable *updated_uncompressed_dirs;
|
||||
|
||||
GKeyFile *config;
|
||||
OstreeRepoMode mode;
|
||||
gboolean enable_uncompressed_cache;
|
||||
|
||||
OstreeRepo *parent_repo;
|
||||
};
|
||||
|
||||
typedef struct {
|
||||
GObjectClass parent_class;
|
||||
} OstreeRepoClass;
|
||||
|
|
@ -1627,8 +1598,8 @@ ostree_repo_get_object_path (OstreeRepo *self,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static GFile *
|
||||
get_uncompressed_object_cache_path (OstreeRepo *self,
|
||||
GFile *
|
||||
_ostree_repo_get_uncompressed_object_cache_path (OstreeRepo *self,
|
||||
const char *checksum)
|
||||
{
|
||||
char *relpath;
|
||||
|
|
@ -3309,806 +3280,6 @@ ostree_repo_list_objects (OstreeRepo *self,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
checkout_file_from_input (GFile *file,
|
||||
OstreeRepoCheckoutMode mode,
|
||||
OstreeRepoCheckoutOverwriteMode overwrite_mode,
|
||||
GFileInfo *finfo,
|
||||
GVariant *xattrs,
|
||||
GInputStream *input,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
gboolean ret = FALSE;
|
||||
GError *temp_error = NULL;
|
||||
gs_unref_object GFile *dir = NULL;
|
||||
gs_unref_object GFile *temp_file = NULL;
|
||||
gs_unref_object GFileInfo *temp_info = NULL;
|
||||
|
||||
if (mode == OSTREE_REPO_CHECKOUT_MODE_USER)
|
||||
{
|
||||
temp_info = g_file_info_dup (finfo);
|
||||
|
||||
g_file_info_set_attribute_uint32 (temp_info, "unix::uid", geteuid ());
|
||||
g_file_info_set_attribute_uint32 (temp_info, "unix::gid", getegid ());
|
||||
|
||||
xattrs = NULL;
|
||||
}
|
||||
else
|
||||
temp_info = g_object_ref (finfo);
|
||||
|
||||
if (overwrite_mode == OSTREE_REPO_CHECKOUT_OVERWRITE_UNION_FILES)
|
||||
{
|
||||
if (g_file_info_get_file_type (temp_info) == G_FILE_TYPE_DIRECTORY)
|
||||
{
|
||||
if (!ostree_create_file_from_input (file, temp_info,
|
||||
xattrs, input,
|
||||
cancellable, &temp_error))
|
||||
{
|
||||
if (g_error_matches (temp_error, G_IO_ERROR, G_IO_ERROR_EXISTS))
|
||||
{
|
||||
g_clear_error (&temp_error);
|
||||
}
|
||||
else
|
||||
{
|
||||
g_propagate_error (error, temp_error);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
dir = g_file_get_parent (file);
|
||||
if (!ostree_create_temp_file_from_input (dir, NULL, "checkout",
|
||||
temp_info, xattrs, input, &temp_file,
|
||||
cancellable, error))
|
||||
goto out;
|
||||
|
||||
if (g_file_info_get_file_type (temp_info) == G_FILE_TYPE_REGULAR)
|
||||
{
|
||||
if (!gs_file_sync_data (temp_file, cancellable, error))
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (rename (gs_file_get_path_cached (temp_file), gs_file_get_path_cached (file)) < 0)
|
||||
{
|
||||
ot_util_set_error_from_errno (error, errno);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (!ostree_create_file_from_input (file, temp_info,
|
||||
xattrs, input, cancellable, error))
|
||||
goto out;
|
||||
|
||||
if (g_file_info_get_file_type (temp_info) == G_FILE_TYPE_REGULAR)
|
||||
{
|
||||
if (!gs_file_sync_data (file, cancellable, error))
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
ret = TRUE;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
checkout_file_hardlink (OstreeRepo *self,
|
||||
OstreeRepoCheckoutMode mode,
|
||||
OstreeRepoCheckoutOverwriteMode overwrite_mode,
|
||||
GFile *source,
|
||||
GFile *destination,
|
||||
int dirfd,
|
||||
gboolean *out_was_supported,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
gboolean ret = FALSE;
|
||||
gboolean ret_was_supported = FALSE;
|
||||
gs_unref_object GFile *dir = NULL;
|
||||
|
||||
again:
|
||||
if (dirfd != -1 &&
|
||||
linkat (-1, gs_file_get_path_cached (source),
|
||||
dirfd, gs_file_get_basename_cached (destination), 0) != -1)
|
||||
ret_was_supported = TRUE;
|
||||
else if (link (gs_file_get_path_cached (source), gs_file_get_path_cached (destination)) != -1)
|
||||
ret_was_supported = TRUE;
|
||||
else if (errno == EMLINK || errno == EXDEV || errno == EPERM)
|
||||
{
|
||||
/* EMLINK, EXDEV and EPERM shouldn't be fatal; we just can't do the
|
||||
* optimization of hardlinking instead of copying.
|
||||
*/
|
||||
ret_was_supported = FALSE;
|
||||
}
|
||||
else if (errno == EEXIST && overwrite_mode == OSTREE_REPO_CHECKOUT_OVERWRITE_UNION_FILES)
|
||||
{
|
||||
/* Idiocy, from man rename(2)
|
||||
*
|
||||
* "If oldpath and newpath are existing hard links referring to
|
||||
* the same file, then rename() does nothing, and returns a
|
||||
* success status."
|
||||
*
|
||||
* So we can't make this atomic.
|
||||
*/
|
||||
(void) unlink (gs_file_get_path_cached (destination));
|
||||
goto again;
|
||||
ret_was_supported = TRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
ot_util_set_error_from_errno (error, errno);
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = TRUE;
|
||||
if (out_was_supported)
|
||||
*out_was_supported = ret_was_supported;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
find_loose_for_checkout (OstreeRepo *self,
|
||||
const char *checksum,
|
||||
GFile **out_loose_path,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
gboolean ret = FALSE;
|
||||
gs_unref_object GFile *path = NULL;
|
||||
struct stat stbuf;
|
||||
|
||||
do
|
||||
{
|
||||
switch (self->mode)
|
||||
{
|
||||
case OSTREE_REPO_MODE_BARE:
|
||||
path = ostree_repo_get_object_path (self, checksum, OSTREE_OBJECT_TYPE_FILE);
|
||||
break;
|
||||
case OSTREE_REPO_MODE_ARCHIVE:
|
||||
path = ostree_repo_get_archive_content_path (self, checksum);
|
||||
break;
|
||||
case OSTREE_REPO_MODE_ARCHIVE_Z2:
|
||||
{
|
||||
if (self->enable_uncompressed_cache)
|
||||
path = get_uncompressed_object_cache_path (self, checksum);
|
||||
else
|
||||
path = NULL;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (!path)
|
||||
{
|
||||
self = self->parent_repo;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (lstat (gs_file_get_path_cached (path), &stbuf) < 0)
|
||||
{
|
||||
if (errno != ENOENT)
|
||||
{
|
||||
ot_util_set_error_from_errno (error, errno);
|
||||
goto out;
|
||||
}
|
||||
self = self->parent_repo;
|
||||
}
|
||||
else if (S_ISLNK (stbuf.st_mode))
|
||||
{
|
||||
/* Don't check out symbolic links via hardlink; it's very easy
|
||||
* to hit the maximum number of hardlinks to an inode this way,
|
||||
* especially since right now we have a lot of symbolic links to
|
||||
* busybox.
|
||||
*
|
||||
* fs/ext4/ext4.h:#define EXT4_LINK_MAX 65000
|
||||
*/
|
||||
self = self->parent_repo;
|
||||
}
|
||||
else
|
||||
break;
|
||||
|
||||
g_clear_object (&path);
|
||||
} while (self != NULL);
|
||||
|
||||
ret = TRUE;
|
||||
ot_transfer_out_value (out_loose_path, &path);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
typedef struct {
|
||||
OstreeRepo *repo;
|
||||
OstreeRepoCheckoutMode mode;
|
||||
OstreeRepoCheckoutOverwriteMode overwrite_mode;
|
||||
GFile *destination;
|
||||
int dirfd;
|
||||
OstreeRepoFile *source;
|
||||
GFileInfo *source_info;
|
||||
GCancellable *cancellable;
|
||||
|
||||
gboolean caught_error;
|
||||
GError *error;
|
||||
|
||||
GSimpleAsyncResult *result;
|
||||
} CheckoutOneFileAsyncData;
|
||||
|
||||
static void
|
||||
checkout_file_async_data_free (gpointer data)
|
||||
{
|
||||
CheckoutOneFileAsyncData *checkout_data = data;
|
||||
|
||||
g_clear_object (&checkout_data->repo);
|
||||
g_clear_object (&checkout_data->destination);
|
||||
g_clear_object (&checkout_data->source);
|
||||
g_clear_object (&checkout_data->source_info);
|
||||
g_clear_object (&checkout_data->cancellable);
|
||||
g_free (checkout_data);
|
||||
}
|
||||
|
||||
static void
|
||||
checkout_file_thread (GSimpleAsyncResult *result,
|
||||
GObject *src,
|
||||
GCancellable *cancellable)
|
||||
{
|
||||
const char *checksum;
|
||||
OstreeRepo *repo;
|
||||
gboolean is_symlink;
|
||||
gboolean hardlink_supported;
|
||||
GError *local_error = NULL;
|
||||
GError **error = &local_error;
|
||||
gs_unref_object GFile *loose_path = NULL;
|
||||
gs_unref_object GInputStream *input = NULL;
|
||||
gs_unref_variant GVariant *xattrs = NULL;
|
||||
CheckoutOneFileAsyncData *checkout_data;
|
||||
|
||||
checkout_data = g_simple_async_result_get_op_res_gpointer (result);
|
||||
repo = checkout_data->repo;
|
||||
|
||||
/* Hack to avoid trying to create device files as a user */
|
||||
if (checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_USER
|
||||
&& g_file_info_get_file_type (checkout_data->source_info) == G_FILE_TYPE_SPECIAL)
|
||||
goto out;
|
||||
|
||||
is_symlink = g_file_info_get_file_type (checkout_data->source_info) == G_FILE_TYPE_SYMBOLIC_LINK;
|
||||
|
||||
checksum = ostree_repo_file_get_checksum ((OstreeRepoFile*)checkout_data->source);
|
||||
|
||||
/* We can only do hardlinks in these scenarios */
|
||||
if (!is_symlink &&
|
||||
((checkout_data->repo->mode == OSTREE_REPO_MODE_BARE && checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_NONE)
|
||||
|| (checkout_data->repo->mode == OSTREE_REPO_MODE_ARCHIVE && checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_USER)
|
||||
|| (checkout_data->repo->mode == OSTREE_REPO_MODE_ARCHIVE_Z2 && checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_USER)))
|
||||
{
|
||||
if (!find_loose_for_checkout (checkout_data->repo, checksum, &loose_path,
|
||||
cancellable, error))
|
||||
goto out;
|
||||
}
|
||||
/* Also, if we're archive-z and we didn't find an object, uncompress it now,
|
||||
* stick it in the cache, and then hardlink to that.
|
||||
*/
|
||||
if (!is_symlink
|
||||
&& loose_path == NULL
|
||||
&& repo->mode == OSTREE_REPO_MODE_ARCHIVE_Z2
|
||||
&& checkout_data->mode == OSTREE_REPO_CHECKOUT_MODE_USER
|
||||
&& repo->enable_uncompressed_cache)
|
||||
{
|
||||
gs_unref_object GFile *objdir = NULL;
|
||||
|
||||
loose_path = get_uncompressed_object_cache_path (repo, checksum);
|
||||
if (!ostree_repo_load_file (repo, checksum, &input, NULL, &xattrs,
|
||||
cancellable, error))
|
||||
goto out;
|
||||
|
||||
objdir = g_file_get_parent (loose_path);
|
||||
if (!gs_file_ensure_directory (objdir, TRUE, cancellable, error))
|
||||
{
|
||||
g_prefix_error (error, "Creating cache directory %s: ",
|
||||
gs_file_get_path_cached (objdir));
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Use UNION_FILES to make this last-one-wins thread behavior
|
||||
* for now; we lose deduplication potentially, but oh well
|
||||
*/
|
||||
if (!checkout_file_from_input (loose_path,
|
||||
OSTREE_REPO_CHECKOUT_MODE_USER,
|
||||
OSTREE_REPO_CHECKOUT_OVERWRITE_UNION_FILES,
|
||||
checkout_data->source_info, xattrs,
|
||||
input, cancellable, error))
|
||||
{
|
||||
g_prefix_error (error, "Unpacking loose object %s: ", checksum);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Store the 2-byte objdir prefix (e.g. e3) in a set. The basic
|
||||
* idea here is that if we had to unpack an object, it's very
|
||||
* likely we're replacing some other object, so we may need a GC.
|
||||
*
|
||||
* This model ensures that we do work roughly proportional to
|
||||
* the size of the changes. For example, we don't scan any
|
||||
* directories if we didn't modify anything, meaning you can
|
||||
* checkout the same tree multiple times very quickly.
|
||||
*
|
||||
* This is also scale independent; we don't hardcode e.g. looking
|
||||
* at 1000 objects.
|
||||
*
|
||||
* The downside is that if we're unlucky, we may not free
|
||||
* an object for quite some time.
|
||||
*/
|
||||
g_mutex_lock (&repo->cache_lock);
|
||||
{
|
||||
gpointer key = GUINT_TO_POINTER ((g_ascii_xdigit_value (checksum[0]) << 4) +
|
||||
g_ascii_xdigit_value (checksum[1]));
|
||||
if (repo->updated_uncompressed_dirs == NULL)
|
||||
repo->updated_uncompressed_dirs = g_hash_table_new (NULL, NULL);
|
||||
g_hash_table_insert (repo->updated_uncompressed_dirs, key, key);
|
||||
}
|
||||
g_mutex_unlock (&repo->cache_lock);
|
||||
}
|
||||
|
||||
if (loose_path)
|
||||
{
|
||||
/* If we found one, try hardlinking */
|
||||
if (!checkout_file_hardlink (checkout_data->repo, checkout_data->mode,
|
||||
checkout_data->overwrite_mode, loose_path,
|
||||
checkout_data->destination, checkout_data->dirfd,
|
||||
&hardlink_supported, cancellable, error))
|
||||
{
|
||||
g_prefix_error (error, "Hardlinking loose object %s to %s: ", checksum,
|
||||
gs_file_get_path_cached (checkout_data->destination));
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
/* Fall back to copy if there's no loose object, or we couldn't hardlink */
|
||||
if (loose_path == NULL || !hardlink_supported)
|
||||
{
|
||||
if (!ostree_repo_load_file (checkout_data->repo, checksum, &input, NULL, &xattrs,
|
||||
cancellable, error))
|
||||
goto out;
|
||||
|
||||
if (!checkout_file_from_input (checkout_data->destination,
|
||||
checkout_data->mode,
|
||||
checkout_data->overwrite_mode,
|
||||
checkout_data->source_info, xattrs,
|
||||
input, cancellable, error))
|
||||
{
|
||||
g_prefix_error (error, "Copying object %s to %s: ", checksum,
|
||||
gs_file_get_path_cached (checkout_data->destination));
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
if (local_error)
|
||||
g_simple_async_result_take_error (result, local_error);
|
||||
}
|
||||
|
||||
static void
|
||||
checkout_one_file_async (OstreeRepo *self,
|
||||
OstreeRepoCheckoutMode mode,
|
||||
OstreeRepoCheckoutOverwriteMode overwrite_mode,
|
||||
OstreeRepoFile *source,
|
||||
GFileInfo *source_info,
|
||||
GFile *destination,
|
||||
int dirfd,
|
||||
GCancellable *cancellable,
|
||||
GAsyncReadyCallback callback,
|
||||
gpointer user_data)
|
||||
{
|
||||
CheckoutOneFileAsyncData *checkout_data;
|
||||
|
||||
checkout_data = g_new0 (CheckoutOneFileAsyncData, 1);
|
||||
checkout_data->repo = g_object_ref (self);
|
||||
checkout_data->mode = mode;
|
||||
checkout_data->overwrite_mode = overwrite_mode;
|
||||
checkout_data->destination = g_object_ref (destination);
|
||||
checkout_data->dirfd = dirfd;
|
||||
checkout_data->source = g_object_ref (source);
|
||||
checkout_data->source_info = g_object_ref (source_info);
|
||||
checkout_data->cancellable = cancellable ? g_object_ref (cancellable) : NULL;
|
||||
|
||||
checkout_data->result = g_simple_async_result_new ((GObject*) self,
|
||||
callback, user_data,
|
||||
checkout_one_file_async);
|
||||
|
||||
g_simple_async_result_set_op_res_gpointer (checkout_data->result, checkout_data,
|
||||
checkout_file_async_data_free);
|
||||
|
||||
g_simple_async_result_run_in_thread (checkout_data->result,
|
||||
checkout_file_thread, G_PRIORITY_DEFAULT,
|
||||
cancellable);
|
||||
g_object_unref (checkout_data->result);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
checkout_one_file_finish (OstreeRepo *self,
|
||||
GAsyncResult *result,
|
||||
GError **error)
|
||||
{
|
||||
GSimpleAsyncResult *simple;
|
||||
|
||||
g_return_val_if_fail (g_simple_async_result_is_valid (result, (GObject*)self, checkout_one_file_async), FALSE);
|
||||
|
||||
simple = G_SIMPLE_ASYNC_RESULT (result);
|
||||
if (g_simple_async_result_propagate_error (simple, error))
|
||||
return FALSE;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
typedef struct {
|
||||
OstreeRepo *repo;
|
||||
OstreeRepoCheckoutMode mode;
|
||||
OstreeRepoCheckoutOverwriteMode overwrite_mode;
|
||||
GFile *destination;
|
||||
OstreeRepoFile *source;
|
||||
GFileInfo *source_info;
|
||||
GCancellable *cancellable;
|
||||
|
||||
gboolean caught_error;
|
||||
GError *error;
|
||||
|
||||
DIR *dir_handle;
|
||||
|
||||
gboolean dir_enumeration_complete;
|
||||
guint pending_ops;
|
||||
guint pending_file_ops;
|
||||
GPtrArray *pending_dirs;
|
||||
GMainLoop *loop;
|
||||
GSimpleAsyncResult *result;
|
||||
} CheckoutTreeAsyncData;
|
||||
|
||||
static void
|
||||
checkout_tree_async_data_free (gpointer data)
|
||||
{
|
||||
CheckoutTreeAsyncData *checkout_data = data;
|
||||
|
||||
g_clear_object (&checkout_data->repo);
|
||||
g_clear_object (&checkout_data->destination);
|
||||
g_clear_object (&checkout_data->source);
|
||||
g_clear_object (&checkout_data->source_info);
|
||||
g_clear_object (&checkout_data->cancellable);
|
||||
if (checkout_data->pending_dirs)
|
||||
g_ptr_array_unref (checkout_data->pending_dirs);
|
||||
if (checkout_data->dir_handle)
|
||||
(void) closedir (checkout_data->dir_handle);
|
||||
g_free (checkout_data);
|
||||
}
|
||||
|
||||
static void
|
||||
on_tree_async_child_op_complete (CheckoutTreeAsyncData *data,
|
||||
GError *local_error)
|
||||
{
|
||||
data->pending_ops--;
|
||||
|
||||
if (local_error)
|
||||
{
|
||||
if (!data->caught_error)
|
||||
{
|
||||
data->caught_error = TRUE;
|
||||
g_propagate_error (&data->error, local_error);
|
||||
}
|
||||
else
|
||||
g_clear_error (&local_error);
|
||||
}
|
||||
|
||||
if (data->pending_ops != 0)
|
||||
return;
|
||||
|
||||
if (data->caught_error)
|
||||
g_simple_async_result_take_error (data->result, data->error);
|
||||
g_simple_async_result_complete_in_idle (data->result);
|
||||
g_object_unref (data->result);
|
||||
}
|
||||
|
||||
static void
|
||||
on_one_subdir_checked_out (GObject *src,
|
||||
GAsyncResult *result,
|
||||
gpointer user_data)
|
||||
{
|
||||
CheckoutTreeAsyncData *data = user_data;
|
||||
GError *local_error = NULL;
|
||||
|
||||
if (!ostree_repo_checkout_tree_finish ((OstreeRepo*) src, result, &local_error))
|
||||
goto out;
|
||||
|
||||
out:
|
||||
on_tree_async_child_op_complete (data, local_error);
|
||||
}
|
||||
|
||||
static void
|
||||
process_pending_dirs (CheckoutTreeAsyncData *data)
|
||||
{
|
||||
guint i;
|
||||
|
||||
g_assert (data->dir_enumeration_complete);
|
||||
g_assert (data->pending_file_ops == 0);
|
||||
|
||||
/* Don't hold a FD open while we're processing
|
||||
* recursive calls, otherwise we can pretty easily
|
||||
* hit the max of 1024 fds =(
|
||||
*/
|
||||
if (data->dir_handle)
|
||||
{
|
||||
(void) closedir (data->dir_handle);
|
||||
data->dir_handle = NULL;
|
||||
}
|
||||
|
||||
if (data->pending_dirs != NULL)
|
||||
{
|
||||
for (i = 0; i < data->pending_dirs->len; i++)
|
||||
{
|
||||
GFileInfo *file_info = data->pending_dirs->pdata[i];
|
||||
const char *name;
|
||||
gs_unref_object GFile *dest_path = NULL;
|
||||
gs_unref_object GFile *src_child = NULL;
|
||||
|
||||
name = g_file_info_get_attribute_byte_string (file_info, "standard::name");
|
||||
|
||||
dest_path = g_file_get_child (data->destination, name);
|
||||
src_child = g_file_get_child ((GFile*)data->source, name);
|
||||
|
||||
ostree_repo_checkout_tree_async (data->repo,
|
||||
data->mode,
|
||||
data->overwrite_mode,
|
||||
dest_path, (OstreeRepoFile*)src_child, file_info,
|
||||
data->cancellable,
|
||||
on_one_subdir_checked_out,
|
||||
data);
|
||||
data->pending_ops++;
|
||||
}
|
||||
g_ptr_array_set_size (data->pending_dirs, 0);
|
||||
on_tree_async_child_op_complete (data, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
on_one_file_checked_out (GObject *src,
|
||||
GAsyncResult *result,
|
||||
gpointer user_data)
|
||||
{
|
||||
CheckoutTreeAsyncData *data = user_data;
|
||||
GError *local_error = NULL;
|
||||
|
||||
if (!checkout_one_file_finish ((OstreeRepo*) src, result, &local_error))
|
||||
goto out;
|
||||
|
||||
out:
|
||||
data->pending_file_ops--;
|
||||
if (data->dir_enumeration_complete && data->pending_file_ops == 0)
|
||||
process_pending_dirs (data);
|
||||
on_tree_async_child_op_complete (data, local_error);
|
||||
}
|
||||
|
||||
static void
|
||||
on_got_next_files (GObject *src,
|
||||
GAsyncResult *result,
|
||||
gpointer user_data)
|
||||
{
|
||||
CheckoutTreeAsyncData *data = user_data;
|
||||
GError *local_error = NULL;
|
||||
GList *files = NULL;
|
||||
GList *iter = NULL;
|
||||
|
||||
files = g_file_enumerator_next_files_finish ((GFileEnumerator*) src, result, &local_error);
|
||||
if (local_error)
|
||||
goto out;
|
||||
|
||||
if (!files)
|
||||
data->dir_enumeration_complete = TRUE;
|
||||
else
|
||||
{
|
||||
g_file_enumerator_next_files_async ((GFileEnumerator*)src, 50, G_PRIORITY_DEFAULT,
|
||||
data->cancellable,
|
||||
on_got_next_files, data);
|
||||
data->pending_ops++;
|
||||
}
|
||||
|
||||
if (data->dir_enumeration_complete && data->pending_file_ops == 0)
|
||||
process_pending_dirs (data);
|
||||
|
||||
for (iter = files; iter; iter = iter->next)
|
||||
{
|
||||
GFileInfo *file_info = iter->data;
|
||||
const char *name;
|
||||
guint32 type;
|
||||
|
||||
name = g_file_info_get_attribute_byte_string (file_info, "standard::name");
|
||||
type = g_file_info_get_attribute_uint32 (file_info, "standard::type");
|
||||
|
||||
if (type != G_FILE_TYPE_DIRECTORY)
|
||||
{
|
||||
gs_unref_object GFile *dest_path = NULL;
|
||||
gs_unref_object GFile *src_child = NULL;
|
||||
|
||||
dest_path = g_file_get_child (data->destination, name);
|
||||
src_child = g_file_get_child ((GFile*)data->source, name);
|
||||
|
||||
checkout_one_file_async (data->repo, data->mode,
|
||||
data->overwrite_mode,
|
||||
(OstreeRepoFile*)src_child, file_info,
|
||||
dest_path, dirfd(data->dir_handle),
|
||||
data->cancellable, on_one_file_checked_out,
|
||||
data);
|
||||
data->pending_file_ops++;
|
||||
data->pending_ops++;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (data->pending_dirs == NULL)
|
||||
{
|
||||
data->pending_dirs = g_ptr_array_new_with_free_func ((GDestroyNotify) g_object_unref);
|
||||
data->pending_ops++;
|
||||
}
|
||||
g_ptr_array_add (data->pending_dirs, g_object_ref (file_info));
|
||||
}
|
||||
g_object_unref (file_info);
|
||||
}
|
||||
|
||||
g_list_free (files);
|
||||
|
||||
out:
|
||||
on_tree_async_child_op_complete (data, local_error);
|
||||
}
|
||||
|
||||
void
|
||||
ostree_repo_checkout_tree_async (OstreeRepo *self,
|
||||
OstreeRepoCheckoutMode mode,
|
||||
OstreeRepoCheckoutOverwriteMode overwrite_mode,
|
||||
GFile *destination,
|
||||
OstreeRepoFile *source,
|
||||
GFileInfo *source_info,
|
||||
GCancellable *cancellable,
|
||||
GAsyncReadyCallback callback,
|
||||
gpointer user_data)
|
||||
{
|
||||
CheckoutTreeAsyncData *checkout_data;
|
||||
gs_unref_object GFileInfo *file_info = NULL;
|
||||
gs_unref_variant GVariant *xattrs = NULL;
|
||||
gs_unref_object GFileEnumerator *dir_enum = NULL;
|
||||
GError *local_error = NULL;
|
||||
GError **error = &local_error;
|
||||
|
||||
checkout_data = g_new0 (CheckoutTreeAsyncData, 1);
|
||||
checkout_data->repo = g_object_ref (self);
|
||||
checkout_data->mode = mode;
|
||||
checkout_data->overwrite_mode = overwrite_mode;
|
||||
checkout_data->destination = g_object_ref (destination);
|
||||
checkout_data->source = g_object_ref (source);
|
||||
checkout_data->source_info = g_object_ref (source_info);
|
||||
checkout_data->cancellable = cancellable ? g_object_ref (cancellable) : NULL;
|
||||
checkout_data->pending_ops++; /* Count this function */
|
||||
|
||||
checkout_data->result = g_simple_async_result_new ((GObject*) self,
|
||||
callback, user_data,
|
||||
ostree_repo_checkout_tree_async);
|
||||
|
||||
g_simple_async_result_set_op_res_gpointer (checkout_data->result, checkout_data,
|
||||
checkout_tree_async_data_free);
|
||||
|
||||
if (!ostree_repo_file_get_xattrs (checkout_data->source, &xattrs, NULL, error))
|
||||
goto out;
|
||||
|
||||
if (!checkout_file_from_input (checkout_data->destination,
|
||||
checkout_data->mode,
|
||||
checkout_data->overwrite_mode,
|
||||
checkout_data->source_info,
|
||||
xattrs, NULL,
|
||||
cancellable, error))
|
||||
goto out;
|
||||
|
||||
checkout_data->dir_handle = opendir (gs_file_get_path_cached (checkout_data->destination));
|
||||
if (!checkout_data->dir_handle)
|
||||
{
|
||||
ot_util_set_error_from_errno (error, errno);
|
||||
goto out;
|
||||
}
|
||||
|
||||
g_clear_pointer (&xattrs, (GDestroyNotify) g_variant_unref);
|
||||
|
||||
dir_enum = g_file_enumerate_children ((GFile*)checkout_data->source,
|
||||
OSTREE_GIO_FAST_QUERYINFO,
|
||||
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
|
||||
cancellable,
|
||||
error);
|
||||
if (!dir_enum)
|
||||
goto out;
|
||||
|
||||
g_file_enumerator_next_files_async (dir_enum, 50, G_PRIORITY_DEFAULT, cancellable,
|
||||
on_got_next_files, checkout_data);
|
||||
checkout_data->pending_ops++;
|
||||
|
||||
out:
|
||||
on_tree_async_child_op_complete (checkout_data, local_error);
|
||||
}
|
||||
|
||||
gboolean
|
||||
ostree_repo_checkout_tree_finish (OstreeRepo *self,
|
||||
GAsyncResult *result,
|
||||
GError **error)
|
||||
{
|
||||
GSimpleAsyncResult *simple;
|
||||
|
||||
g_return_val_if_fail (g_simple_async_result_is_valid (result, (GObject*)self, ostree_repo_checkout_tree_async), FALSE);
|
||||
|
||||
simple = G_SIMPLE_ASYNC_RESULT (result);
|
||||
if (g_simple_async_result_propagate_error (simple, error))
|
||||
return FALSE;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/**
|
||||
* ostree_repo_checkout_gc:
|
||||
*
|
||||
* Call this after finishing a succession of checkout operations; it
|
||||
* will delete any currently-unused uncompressed objects from the
|
||||
* cache.
|
||||
*/
|
||||
gboolean
|
||||
ostree_repo_checkout_gc (OstreeRepo *self,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
gboolean ret = FALSE;
|
||||
gs_unref_hashtable GHashTable *to_clean_dirs = NULL;
|
||||
GHashTableIter iter;
|
||||
gpointer key, value;
|
||||
|
||||
g_mutex_lock (&self->cache_lock);
|
||||
to_clean_dirs = self->updated_uncompressed_dirs;
|
||||
self->updated_uncompressed_dirs = g_hash_table_new (NULL, NULL);
|
||||
g_mutex_unlock (&self->cache_lock);
|
||||
|
||||
if (to_clean_dirs)
|
||||
g_hash_table_iter_init (&iter, to_clean_dirs);
|
||||
while (to_clean_dirs && g_hash_table_iter_next (&iter, &key, &value))
|
||||
{
|
||||
gs_unref_object GFile *objdir = NULL;
|
||||
gs_unref_object GFileEnumerator *enumerator = NULL;
|
||||
gs_free char *objdir_name = NULL;
|
||||
|
||||
objdir_name = g_strdup_printf ("%02x", GPOINTER_TO_UINT (key));
|
||||
objdir = ot_gfile_get_child_build_path (self->uncompressed_objects_dir, "objects",
|
||||
objdir_name, NULL);
|
||||
|
||||
enumerator = g_file_enumerate_children (objdir, "standard::name,standard::type,unix::inode,unix::nlink",
|
||||
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
|
||||
cancellable,
|
||||
error);
|
||||
if (!enumerator)
|
||||
goto out;
|
||||
|
||||
while (TRUE)
|
||||
{
|
||||
GFileInfo *file_info;
|
||||
guint32 nlinks;
|
||||
|
||||
if (!gs_file_enumerator_iterate (enumerator, &file_info, NULL,
|
||||
cancellable, error))
|
||||
goto out;
|
||||
if (file_info == NULL)
|
||||
break;
|
||||
|
||||
nlinks = g_file_info_get_attribute_uint32 (file_info, "unix::nlink");
|
||||
if (nlinks == 1)
|
||||
{
|
||||
gs_unref_object GFile *objpath = NULL;
|
||||
objpath = g_file_get_child (objdir, g_file_info_get_name (file_info));
|
||||
if (!gs_file_unlink (objpath, cancellable, error))
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ret = TRUE;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
gboolean
|
||||
ostree_repo_read_commit (OstreeRepo *self,
|
||||
const char *rev,
|
||||
|
|
|
|||
Loading…
Reference in New Issue