| /* hotcopys.c --- FS hotcopy functionality for FSX |
| * |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| */ |
| #include "svn_pools.h" |
| #include "svn_path.h" |
| #include "svn_dirent_uri.h" |
| |
| #include "fs_x.h" |
| #include "hotcopy.h" |
| #include "util.h" |
| #include "revprops.h" |
| #include "rep-cache.h" |
| #include "transaction.h" |
| #include "recovery.h" |
| |
| #include "../libsvn_fs/fs-loader.h" |
| |
| #include "svn_private_config.h" |
| |
| /* Like svn_io_dir_file_copy(), but doesn't copy files that exist at |
| * the destination and do not differ in terms of kind, size, and mtime. |
| * Set *SKIPPED_P to FALSE only if the file was copied, do not change |
| * the value in *SKIPPED_P otherwise. SKIPPED_P may be NULL if not |
| * required. */ |
| static svn_error_t * |
| hotcopy_io_dir_file_copy(svn_boolean_t *skipped_p, |
| const char *src_path, |
| const char *dst_path, |
| const char *file, |
| apr_pool_t *scratch_pool) |
| { |
| const svn_io_dirent2_t *src_dirent; |
| const svn_io_dirent2_t *dst_dirent; |
| const char *src_target; |
| const char *dst_target; |
| |
| /* Does the destination already exist? If not, we must copy it. */ |
| dst_target = svn_dirent_join(dst_path, file, scratch_pool); |
| SVN_ERR(svn_io_stat_dirent2(&dst_dirent, dst_target, FALSE, TRUE, |
| scratch_pool, scratch_pool)); |
| if (dst_dirent->kind != svn_node_none) |
| { |
| /* If the destination's stat information indicates that the file |
| * is equal to the source, don't bother copying the file again. */ |
| src_target = svn_dirent_join(src_path, file, scratch_pool); |
| SVN_ERR(svn_io_stat_dirent2(&src_dirent, src_target, FALSE, FALSE, |
| scratch_pool, scratch_pool)); |
| if (src_dirent->kind == dst_dirent->kind && |
| src_dirent->special == dst_dirent->special && |
| src_dirent->filesize == dst_dirent->filesize && |
| src_dirent->mtime <= dst_dirent->mtime) |
| return SVN_NO_ERROR; |
| } |
| |
| if (skipped_p) |
| *skipped_p = FALSE; |
| |
| return svn_error_trace(svn_io_dir_file_copy(src_path, dst_path, file, |
| scratch_pool)); |
| } |
| |
| /* Set *NAME_P to the UTF-8 representation of directory entry NAME. |
| * NAME is in the internal encoding used by APR; PARENT is in |
| * UTF-8 and in internal (not local) style. |
| * |
| * Use PARENT only for generating an error string if the conversion |
| * fails because NAME could not be represented in UTF-8. In that |
| * case, return a two-level error in which the outer error's message |
| * mentions PARENT, but the inner error's message does not mention |
| * NAME (except possibly in hex) since NAME may not be printable. |
| * Such a compound error at least allows the user to go looking in the |
| * right directory for the problem. |
| * |
| * If there is any other error, just return that error directly. |
| * |
| * If there is any error, the effect on *NAME_P is undefined. |
| * |
| * *NAME_P and NAME may refer to the same storage. |
| */ |
| static svn_error_t * |
| entry_name_to_utf8(const char **name_p, |
| const char *name, |
| const char *parent, |
| apr_pool_t *result_pool) |
| { |
| svn_error_t *err = svn_path_cstring_to_utf8(name_p, name, result_pool); |
| if (err && err->apr_err == APR_EINVAL) |
| { |
| return svn_error_createf(err->apr_err, err, |
| _("Error converting entry " |
| "in directory '%s' to UTF-8"), |
| svn_dirent_local_style(parent, result_pool)); |
| } |
| return err; |
| } |
| |
| /* Like svn_io_copy_dir_recursively() but doesn't copy regular files that |
| * exist in the destination and do not differ from the source in terms of |
| * kind, size, and mtime. Set *SKIPPED_P to FALSE only if at least one |
| * file was copied, do not change the value in *SKIPPED_P otherwise. |
| * SKIPPED_P may be NULL if not required. */ |
| static svn_error_t * |
| hotcopy_io_copy_dir_recursively(svn_boolean_t *skipped_p, |
| const char *src, |
| const char *dst_parent, |
| const char *dst_basename, |
| svn_boolean_t copy_perms, |
| svn_cancel_func_t cancel_func, |
| void *cancel_baton, |
| apr_pool_t *scratch_pool) |
| { |
| svn_node_kind_t kind; |
| apr_status_t status; |
| const char *dst_path; |
| apr_dir_t *this_dir; |
| apr_finfo_t this_entry; |
| apr_int32_t flags = APR_FINFO_TYPE | APR_FINFO_NAME; |
| |
| /* Make a subpool for recursion */ |
| apr_pool_t *subpool = svn_pool_create(scratch_pool); |
| |
| /* The 'dst_path' is simply dst_parent/dst_basename */ |
| dst_path = svn_dirent_join(dst_parent, dst_basename, scratch_pool); |
| |
| /* Sanity checks: SRC and DST_PARENT are directories, and |
| DST_BASENAME doesn't already exist in DST_PARENT. */ |
| SVN_ERR(svn_io_check_path(src, &kind, subpool)); |
| if (kind != svn_node_dir) |
| return svn_error_createf(SVN_ERR_NODE_UNEXPECTED_KIND, NULL, |
| _("Source '%s' is not a directory"), |
| svn_dirent_local_style(src, scratch_pool)); |
| |
| SVN_ERR(svn_io_check_path(dst_parent, &kind, subpool)); |
| if (kind != svn_node_dir) |
| return svn_error_createf(SVN_ERR_NODE_UNEXPECTED_KIND, NULL, |
| _("Destination '%s' is not a directory"), |
| svn_dirent_local_style(dst_parent, |
| scratch_pool)); |
| |
| SVN_ERR(svn_io_check_path(dst_path, &kind, subpool)); |
| |
| /* Create the new directory. */ |
| /* ### TODO: copy permissions (needs apr_file_attrs_get()) */ |
| SVN_ERR(svn_io_make_dir_recursively(dst_path, scratch_pool)); |
| |
| /* Loop over the dirents in SRC. ('.' and '..' are auto-excluded) */ |
| SVN_ERR(svn_io_dir_open(&this_dir, src, subpool)); |
| |
| for (status = apr_dir_read(&this_entry, flags, this_dir); |
| status == APR_SUCCESS; |
| status = apr_dir_read(&this_entry, flags, this_dir)) |
| { |
| if ((this_entry.name[0] == '.') |
| && ((this_entry.name[1] == '\0') |
| || ((this_entry.name[1] == '.') |
| && (this_entry.name[2] == '\0')))) |
| { |
| continue; |
| } |
| else |
| { |
| const char *entryname_utf8; |
| |
| if (cancel_func) |
| SVN_ERR(cancel_func(cancel_baton)); |
| |
| SVN_ERR(entry_name_to_utf8(&entryname_utf8, this_entry.name, |
| src, subpool)); |
| if (this_entry.filetype == APR_REG) /* regular file */ |
| { |
| SVN_ERR(hotcopy_io_dir_file_copy(skipped_p, src, dst_path, |
| entryname_utf8, subpool)); |
| } |
| else if (this_entry.filetype == APR_LNK) /* symlink */ |
| { |
| const char *src_target = svn_dirent_join(src, entryname_utf8, |
| subpool); |
| const char *dst_target = svn_dirent_join(dst_path, |
| entryname_utf8, |
| subpool); |
| SVN_ERR(svn_io_copy_link(src_target, dst_target, |
| subpool)); |
| } |
| else if (this_entry.filetype == APR_DIR) /* recurse */ |
| { |
| const char *src_target; |
| |
| /* Prevent infinite recursion by filtering off our |
| newly created destination path. */ |
| if (strcmp(src, dst_parent) == 0 |
| && strcmp(entryname_utf8, dst_basename) == 0) |
| continue; |
| |
| src_target = svn_dirent_join(src, entryname_utf8, subpool); |
| SVN_ERR(hotcopy_io_copy_dir_recursively(skipped_p, |
| src_target, |
| dst_path, |
| entryname_utf8, |
| copy_perms, |
| cancel_func, |
| cancel_baton, |
| subpool)); |
| } |
| /* ### support other APR node types someday?? */ |
| |
| } |
| } |
| |
| if (! (APR_STATUS_IS_ENOENT(status))) |
| return svn_error_wrap_apr(status, _("Can't read directory '%s'"), |
| svn_dirent_local_style(src, scratch_pool)); |
| |
| status = apr_dir_close(this_dir); |
| if (status) |
| return svn_error_wrap_apr(status, _("Error closing directory '%s'"), |
| svn_dirent_local_style(src, scratch_pool)); |
| |
| /* Free any memory used by recursion */ |
| svn_pool_destroy(subpool); |
| |
| return SVN_NO_ERROR; |
| } |
| |
| /* Copy an un-packed revision or revprop file for revision REV from SRC_SUBDIR |
| * to DST_SUBDIR. Assume a sharding layout based on MAX_FILES_PER_DIR. |
| * Set *SKIPPED_P to FALSE only if the file was copied, do not change the |
| * value in *SKIPPED_P otherwise. SKIPPED_P may be NULL if not required. |
| * If PROPS is set, copy the revprops file, otherwise copy the rev data file. |
| * Use SCRATCH_POOL for temporary allocations. */ |
| static svn_error_t * |
| hotcopy_copy_shard_file(svn_boolean_t *skipped_p, |
| const char *src_subdir, |
| const char *dst_subdir, |
| svn_revnum_t rev, |
| int max_files_per_dir, |
| svn_boolean_t props, |
| apr_pool_t *scratch_pool) |
| { |
| const char *src_subdir_shard = src_subdir, |
| *dst_subdir_shard = dst_subdir; |
| |
| const char *shard = apr_psprintf(scratch_pool, "%ld", |
| rev / max_files_per_dir); |
| src_subdir_shard = svn_dirent_join(src_subdir, shard, scratch_pool); |
| dst_subdir_shard = svn_dirent_join(dst_subdir, shard, scratch_pool); |
| |
| if (rev % max_files_per_dir == 0) |
| { |
| SVN_ERR(svn_io_make_dir_recursively(dst_subdir_shard, scratch_pool)); |
| SVN_ERR(svn_io_copy_perms(dst_subdir, dst_subdir_shard, |
| scratch_pool)); |
| } |
| |
| SVN_ERR(hotcopy_io_dir_file_copy(skipped_p, |
| src_subdir_shard, dst_subdir_shard, |
| apr_psprintf(scratch_pool, "%c%ld", |
| props ? 'p' : 'r', |
| rev), |
| scratch_pool)); |
| return SVN_NO_ERROR; |
| } |
| |
| |
| /* Copy a packed shard containing revision REV, and which contains |
| * MAX_FILES_PER_DIR revisions, from SRC_FS to DST_FS. |
| * Update *DST_MIN_UNPACKED_REV in case the shard is new in DST_FS. |
| * Do not re-copy data which already exists in DST_FS. |
| * Set *SKIPPED_P to FALSE only if at least one part of the shard |
| * was copied, do not change the value in *SKIPPED_P otherwise. |
| * SKIPPED_P may be NULL if not required. |
| * Use SCRATCH_POOL for temporary allocations. */ |
| static svn_error_t * |
| hotcopy_copy_packed_shard(svn_boolean_t *skipped_p, |
| svn_revnum_t *dst_min_unpacked_rev, |
| svn_fs_t *src_fs, |
| svn_fs_t *dst_fs, |
| svn_revnum_t rev, |
| int max_files_per_dir, |
| apr_pool_t *scratch_pool) |
| { |
| const char *src_subdir; |
| const char *dst_subdir; |
| const char *packed_shard; |
| const char *src_subdir_packed_shard; |
| |
| /* Copy the packed shard. */ |
| src_subdir = svn_dirent_join(src_fs->path, PATH_REVS_DIR, scratch_pool); |
| dst_subdir = svn_dirent_join(dst_fs->path, PATH_REVS_DIR, scratch_pool); |
| packed_shard = apr_psprintf(scratch_pool, "%ld" PATH_EXT_PACKED_SHARD, |
| rev / max_files_per_dir); |
| src_subdir_packed_shard = svn_dirent_join(src_subdir, packed_shard, |
| scratch_pool); |
| SVN_ERR(hotcopy_io_copy_dir_recursively(skipped_p, src_subdir_packed_shard, |
| dst_subdir, packed_shard, |
| TRUE /* copy_perms */, |
| NULL /* cancel_func */, NULL, |
| scratch_pool)); |
| |
| /* If necessary, update the min-unpacked rev file in the hotcopy. */ |
| if (*dst_min_unpacked_rev < rev + max_files_per_dir) |
| { |
| *dst_min_unpacked_rev = rev + max_files_per_dir; |
| SVN_ERR(svn_fs_x__write_min_unpacked_rev(dst_fs, |
| *dst_min_unpacked_rev, |
| scratch_pool)); |
| } |
| |
| return SVN_NO_ERROR; |
| } |
| |
| /* Remove file PATH, if it exists - even if it is read-only. |
| * Use SCRATCH_POOL for temporary allocations. */ |
| static svn_error_t * |
| hotcopy_remove_file(const char *path, |
| apr_pool_t *scratch_pool) |
| { |
| /* Make the rev file writable and remove it. */ |
| SVN_ERR(svn_io_set_file_read_write(path, TRUE, scratch_pool)); |
| SVN_ERR(svn_io_remove_file2(path, TRUE, scratch_pool)); |
| |
| return SVN_NO_ERROR; |
| } |
| |
| /* Verify that DST_FS is a suitable destination for an incremental |
| * hotcopy from SRC_FS. */ |
| static svn_error_t * |
| hotcopy_incremental_check_preconditions(svn_fs_t *src_fs, |
| svn_fs_t *dst_fs) |
| { |
| svn_fs_x__data_t *src_ffd = src_fs->fsap_data; |
| svn_fs_x__data_t *dst_ffd = dst_fs->fsap_data; |
| |
| /* We only support incremental hotcopy between the same format. */ |
| if (src_ffd->format != dst_ffd->format) |
| return svn_error_createf(SVN_ERR_UNSUPPORTED_FEATURE, NULL, |
| _("The FSX format (%d) of the hotcopy source does not match the " |
| "FSX format (%d) of the hotcopy destination; please upgrade " |
| "both repositories to the same format"), |
| src_ffd->format, dst_ffd->format); |
| |
| /* Make sure the UUID of source and destination match up. |
| * We don't want to copy over a different repository. */ |
| if (strcmp(src_fs->uuid, dst_fs->uuid) != 0) |
| return svn_error_create(SVN_ERR_RA_UUID_MISMATCH, NULL, |
| _("The UUID of the hotcopy source does " |
| "not match the UUID of the hotcopy " |
| "destination")); |
| |
| /* Also require same shard size. */ |
| if (src_ffd->max_files_per_dir != dst_ffd->max_files_per_dir) |
| return svn_error_create(SVN_ERR_UNSUPPORTED_FEATURE, NULL, |
| _("The sharding layout configuration " |
| "of the hotcopy source does not match " |
| "the sharding layout configuration of " |
| "the hotcopy destination")); |
| return SVN_NO_ERROR; |
| } |
| |
| /* Copy the revision and revprop files (possibly sharded / packed) from |
| * SRC_FS to DST_FS. Do not re-copy data which already exists in DST_FS. |
| * When copying packed or unpacked shards, checkpoint the result in DST_FS |
| * for every shard by updating the 'current' file if necessary. Assume |
| * the >= SVN_FS_FS__MIN_NO_GLOBAL_IDS_FORMAT filesystem format without |
| * global next-ID counters. Indicate progress via the optional NOTIFY_FUNC |
| * callback using NOTIFY_BATON. Use SCRATCH_POOL for temporary allocations. |
| */ |
| static svn_error_t * |
| hotcopy_revisions(svn_fs_t *src_fs, |
| svn_fs_t *dst_fs, |
| svn_revnum_t src_youngest, |
| svn_revnum_t dst_youngest, |
| svn_boolean_t incremental, |
| const char *src_revs_dir, |
| const char *dst_revs_dir, |
| svn_fs_hotcopy_notify_t notify_func, |
| void* notify_baton, |
| svn_cancel_func_t cancel_func, |
| void* cancel_baton, |
| apr_pool_t *scratch_pool) |
| { |
| svn_fs_x__data_t *src_ffd = src_fs->fsap_data; |
| int max_files_per_dir = src_ffd->max_files_per_dir; |
| svn_revnum_t src_min_unpacked_rev; |
| svn_revnum_t dst_min_unpacked_rev; |
| svn_revnum_t rev; |
| apr_pool_t *iterpool; |
| |
| /* Copy the min unpacked rev, and read its value. */ |
| SVN_ERR(svn_fs_x__read_min_unpacked_rev(&src_min_unpacked_rev, src_fs, |
| scratch_pool)); |
| SVN_ERR(svn_fs_x__read_min_unpacked_rev(&dst_min_unpacked_rev, dst_fs, |
| scratch_pool)); |
| |
| /* We only support packs coming from the hotcopy source. |
| * The destination should not be packed independently from |
| * the source. This also catches the case where users accidentally |
| * swap the source and destination arguments. */ |
| if (src_min_unpacked_rev < dst_min_unpacked_rev) |
| return svn_error_createf(SVN_ERR_UNSUPPORTED_FEATURE, NULL, |
| _("The hotcopy destination already contains " |
| "more packed revisions (%lu) than the " |
| "hotcopy source contains (%lu)"), |
| dst_min_unpacked_rev - 1, |
| src_min_unpacked_rev - 1); |
| |
| SVN_ERR(svn_io_dir_file_copy(src_fs->path, dst_fs->path, |
| PATH_MIN_UNPACKED_REV, scratch_pool)); |
| |
| if (cancel_func) |
| SVN_ERR(cancel_func(cancel_baton)); |
| |
| /* |
| * Copy the necessary rev files. |
| */ |
| |
| iterpool = svn_pool_create(scratch_pool); |
| /* First, copy packed shards. */ |
| for (rev = 0; rev < src_min_unpacked_rev; rev += max_files_per_dir) |
| { |
| svn_boolean_t skipped = TRUE; |
| svn_revnum_t pack_end_rev; |
| |
| svn_pool_clear(iterpool); |
| |
| if (cancel_func) |
| SVN_ERR(cancel_func(cancel_baton)); |
| |
| /* Copy the packed shard. */ |
| SVN_ERR(hotcopy_copy_packed_shard(&skipped, &dst_min_unpacked_rev, |
| src_fs, dst_fs, |
| rev, max_files_per_dir, |
| iterpool)); |
| |
| pack_end_rev = rev + max_files_per_dir - 1; |
| |
| /* Whenever this pack did not previously exist in the destination, |
| * update 'current' to the most recent packed rev (so readers can see |
| * new revisions which arrived in this pack). */ |
| if (pack_end_rev > dst_youngest) |
| { |
| SVN_ERR(svn_fs_x__write_current(dst_fs, pack_end_rev, iterpool)); |
| } |
| |
| /* When notifying about packed shards, make things simpler by either |
| * reporting a full revision range, i.e [pack start, pack end] or |
| * reporting nothing. There is one case when this approach might not |
| * be exact (incremental hotcopy with a pack replacing last unpacked |
| * revisions), but generally this is good enough. */ |
| if (notify_func && !skipped) |
| notify_func(notify_baton, rev, pack_end_rev, iterpool); |
| |
| /* Now that all revisions have moved into the pack, the original |
| * rev dir can be removed. */ |
| SVN_ERR(svn_io_remove_dir2(svn_fs_x__path_shard(dst_fs, rev, iterpool), |
| TRUE, cancel_func, cancel_baton, iterpool)); |
| } |
| |
| if (cancel_func) |
| SVN_ERR(cancel_func(cancel_baton)); |
| |
| SVN_ERR_ASSERT(rev == src_min_unpacked_rev); |
| SVN_ERR_ASSERT(src_min_unpacked_rev == dst_min_unpacked_rev); |
| |
| /* Now, copy pairs of non-packed revisions and revprop files. |
| * If necessary, update 'current' after copying all files from a shard. */ |
| for (; rev <= src_youngest; rev++) |
| { |
| svn_boolean_t skipped = TRUE; |
| |
| svn_pool_clear(iterpool); |
| |
| if (cancel_func) |
| SVN_ERR(cancel_func(cancel_baton)); |
| |
| /* Copying non-packed revisions is racy in case the source repository is |
| * being packed concurrently with this hotcopy operation. With the pack |
| * lock, however, the race is impossible, because hotcopy and pack |
| * operations block each other. |
| * |
| * We assume that all revisions coming after 'min-unpacked-rev' really |
| * are unpacked and that's not necessarily true with concurrent packing. |
| * Don't try to be smart in this edge case, because handling it properly |
| * might require copying *everything* from the start. Just abort the |
| * hotcopy with an ENOENT (revision file moved to a pack, so it is no |
| * longer where we expect it to be). */ |
| |
| /* Copy the rev file. */ |
| SVN_ERR(hotcopy_copy_shard_file(&skipped, src_revs_dir, dst_revs_dir, |
| rev, max_files_per_dir, FALSE, |
| iterpool)); |
| |
| /* Copy the revprop file. */ |
| SVN_ERR(hotcopy_copy_shard_file(&skipped, src_revs_dir, dst_revs_dir, |
| rev, max_files_per_dir, TRUE, |
| iterpool)); |
| |
| /* Whenever this revision did not previously exist in the destination, |
| * checkpoint the progress via 'current' (do that once per full shard |
| * in order not to slow things down). */ |
| if (rev > dst_youngest) |
| { |
| if (max_files_per_dir && (rev % max_files_per_dir == 0)) |
| { |
| SVN_ERR(svn_fs_x__write_current(dst_fs, rev, iterpool)); |
| } |
| } |
| |
| if (notify_func && !skipped) |
| notify_func(notify_baton, rev, rev, iterpool); |
| } |
| svn_pool_destroy(iterpool); |
| |
| /* We assume that all revisions were copied now, i.e. we didn't exit the |
| * above loop early. 'rev' was last incremented during exit of the loop. */ |
| SVN_ERR_ASSERT(rev == src_youngest + 1); |
| |
| return SVN_NO_ERROR; |
| } |
| |
| /* Baton for hotcopy_body(). */ |
| typedef struct hotcopy_body_baton_t { |
| svn_fs_t *src_fs; |
| svn_fs_t *dst_fs; |
| svn_boolean_t incremental; |
| svn_fs_hotcopy_notify_t notify_func; |
| void *notify_baton; |
| svn_cancel_func_t cancel_func; |
| void *cancel_baton; |
| } hotcopy_body_baton_t; |
| |
| /* Perform a hotcopy, either normal or incremental. |
| * |
| * Normal hotcopy assumes that the destination exists as an empty |
| * directory. It behaves like an incremental hotcopy except that |
| * none of the copied files already exist in the destination. |
| * |
| * An incremental hotcopy copies only changed or new files to the destination, |
| * and removes files from the destination no longer present in the source. |
| * While the incremental hotcopy is running, readers should still be able |
| * to access the destination repository without error and should not see |
| * revisions currently in progress of being copied. Readers are able to see |
| * new fully copied revisions even if the entire incremental hotcopy procedure |
| * has not yet completed. |
| * |
| * Writers are blocked out completely during the entire incremental hotcopy |
| * process to ensure consistency. This function assumes that the repository |
| * write-lock is held. |
| */ |
| static svn_error_t * |
| hotcopy_body(void *baton, |
| apr_pool_t *scratch_pool) |
| { |
| hotcopy_body_baton_t *hbb = baton; |
| svn_fs_t *src_fs = hbb->src_fs; |
| svn_fs_t *dst_fs = hbb->dst_fs; |
| svn_boolean_t incremental = hbb->incremental; |
| svn_fs_hotcopy_notify_t notify_func = hbb->notify_func; |
| void* notify_baton = hbb->notify_baton; |
| svn_cancel_func_t cancel_func = hbb->cancel_func; |
| void* cancel_baton = hbb->cancel_baton; |
| svn_revnum_t src_youngest; |
| svn_revnum_t dst_youngest; |
| const char *src_revs_dir; |
| const char *dst_revs_dir; |
| const char *src_subdir; |
| const char *dst_subdir; |
| svn_node_kind_t kind; |
| |
| /* Try to copy the config. |
| * |
| * ### We try copying the config file before doing anything else, |
| * ### because higher layers will abort the hotcopy if we throw |
| * ### an error from this function, and that renders the hotcopy |
| * ### unusable anyway. */ |
| SVN_ERR(svn_io_dir_file_copy(src_fs->path, dst_fs->path, PATH_CONFIG, |
| scratch_pool)); |
| |
| if (cancel_func) |
| SVN_ERR(cancel_func(cancel_baton)); |
| |
| /* Find the youngest revision in the source and destination. |
| * We only support hotcopies from sources with an equal or greater amount |
| * of revisions than the destination. |
| * This also catches the case where users accidentally swap the |
| * source and destination arguments. */ |
| SVN_ERR(svn_fs_x__read_current(&src_youngest, src_fs, scratch_pool)); |
| if (incremental) |
| { |
| SVN_ERR(svn_fs_x__youngest_rev(&dst_youngest, dst_fs, scratch_pool)); |
| if (src_youngest < dst_youngest) |
| return svn_error_createf(SVN_ERR_UNSUPPORTED_FEATURE, NULL, |
| _("The hotcopy destination already contains more revisions " |
| "(%lu) than the hotcopy source contains (%lu); are source " |
| "and destination swapped?"), |
| dst_youngest, src_youngest); |
| } |
| else |
| dst_youngest = 0; |
| |
| src_revs_dir = svn_dirent_join(src_fs->path, PATH_REVS_DIR, scratch_pool); |
| dst_revs_dir = svn_dirent_join(dst_fs->path, PATH_REVS_DIR, scratch_pool); |
| |
| /* Ensure that the required folders exist in the destination |
| * before actually copying the revisions and revprops. */ |
| SVN_ERR(svn_io_make_dir_recursively(dst_revs_dir, scratch_pool)); |
| if (cancel_func) |
| SVN_ERR(cancel_func(cancel_baton)); |
| |
| /* Split the logic for new and old FS formats. The latter is much simpler |
| * due to the absence of sharding and packing. However, it requires special |
| * care when updating the 'current' file (which contains not just the |
| * revision number, but also the next-ID counters). */ |
| SVN_ERR(hotcopy_revisions(src_fs, dst_fs, src_youngest, dst_youngest, |
| incremental, src_revs_dir, dst_revs_dir, |
| notify_func, notify_baton, |
| cancel_func, cancel_baton, scratch_pool)); |
| SVN_ERR(svn_fs_x__write_current(dst_fs, src_youngest, scratch_pool)); |
| |
| /* Replace the locks tree. |
| * This is racy in case readers are currently trying to list locks in |
| * the destination. However, we need to get rid of stale locks. |
| * This is the simplest way of doing this, so we accept this small race. */ |
| dst_subdir = svn_dirent_join(dst_fs->path, PATH_LOCKS_DIR, scratch_pool); |
| SVN_ERR(svn_io_remove_dir2(dst_subdir, TRUE, cancel_func, cancel_baton, |
| scratch_pool)); |
| src_subdir = svn_dirent_join(src_fs->path, PATH_LOCKS_DIR, scratch_pool); |
| SVN_ERR(svn_io_check_path(src_subdir, &kind, scratch_pool)); |
| if (kind == svn_node_dir) |
| SVN_ERR(svn_io_copy_dir_recursively(src_subdir, dst_fs->path, |
| PATH_LOCKS_DIR, TRUE, |
| cancel_func, cancel_baton, |
| scratch_pool)); |
| |
| /* |
| * NB: Data copied below is only read by writers, not readers. |
| * Writers are still locked out at this point. |
| */ |
| |
| /* Copy the rep cache and then remove entries for revisions |
| * younger than the destination's youngest revision. */ |
| src_subdir = svn_dirent_join(src_fs->path, REP_CACHE_DB_NAME, scratch_pool); |
| dst_subdir = svn_dirent_join(dst_fs->path, REP_CACHE_DB_NAME, scratch_pool); |
| SVN_ERR(svn_io_check_path(src_subdir, &kind, scratch_pool)); |
| if (kind == svn_node_file) |
| { |
| /* Copy the rep cache and then remove entries for revisions |
| * that did not make it into the destination. */ |
| SVN_ERR(svn_sqlite__hotcopy(src_subdir, dst_subdir, scratch_pool)); |
| |
| /* The source might have r/o flags set on it - which would be |
| carried over to the copy. */ |
| SVN_ERR(svn_io_set_file_read_write(dst_subdir, FALSE, scratch_pool)); |
| SVN_ERR(svn_fs_x__del_rep_reference(dst_fs, src_youngest, |
| scratch_pool)); |
| } |
| |
| /* Copy the txn-current file. */ |
| SVN_ERR(svn_io_dir_file_copy(src_fs->path, dst_fs->path, |
| PATH_TXN_CURRENT, scratch_pool)); |
| |
| /* If a revprop generation file exists in the source filesystem, |
| * reset it to zero (since this is on a different path, it will not |
| * overlap with data already in cache). Also, clean up stale files |
| * used for the named atomics implementation. */ |
| SVN_ERR(svn_fs_x__reset_revprop_generation_file(dst_fs, scratch_pool)); |
| |
| /* Hotcopied FS is complete. Stamp it with a format file. */ |
| SVN_ERR(svn_fs_x__write_format(dst_fs, TRUE, scratch_pool)); |
| |
| return SVN_NO_ERROR; |
| } |
| |
| svn_error_t * |
| svn_fs_x__hotcopy(svn_fs_t *src_fs, |
| svn_fs_t *dst_fs, |
| const char *src_path, |
| const char *dst_path, |
| svn_boolean_t incremental, |
| svn_fs_hotcopy_notify_t notify_func, |
| void *notify_baton, |
| svn_cancel_func_t cancel_func, |
| void *cancel_baton, |
| svn_mutex__t *common_pool_lock, |
| apr_pool_t *scratch_pool, |
| apr_pool_t *common_pool) |
| { |
| hotcopy_body_baton_t hbb; |
| |
| if (cancel_func) |
| SVN_ERR(cancel_func(cancel_baton)); |
| |
| SVN_ERR(svn_fs_x__open(src_fs, src_path, scratch_pool)); |
| |
| if (incremental) |
| { |
| const char *dst_format_abspath; |
| svn_node_kind_t dst_format_kind; |
| |
| /* Check destination format to be sure we know how to incrementally |
| * hotcopy to the destination FS. */ |
| dst_format_abspath = svn_dirent_join(dst_path, PATH_FORMAT, |
| scratch_pool); |
| SVN_ERR(svn_io_check_path(dst_format_abspath, &dst_format_kind, |
| scratch_pool)); |
| if (dst_format_kind == svn_node_none) |
| { |
| /* No destination? Fallback to a non-incremental hotcopy. */ |
| incremental = FALSE; |
| } |
| } |
| |
| if (incremental) |
| { |
| /* Check the existing repository. */ |
| SVN_ERR(svn_fs_x__open(dst_fs, dst_path, scratch_pool)); |
| SVN_ERR(hotcopy_incremental_check_preconditions(src_fs, dst_fs)); |
| |
| SVN_ERR(svn_fs_x__initialize_shared_data(dst_fs, common_pool_lock, |
| scratch_pool, common_pool)); |
| SVN_ERR(svn_fs_x__initialize_caches(dst_fs, scratch_pool)); |
| } |
| else |
| { |
| /* Start out with an empty destination using the same configuration |
| * as the source. */ |
| svn_fs_x__data_t *src_ffd = src_fs->fsap_data; |
| |
| /* Create the DST_FS repository with the same layout as SRC_FS. */ |
| SVN_ERR(svn_fs_x__create_file_tree(dst_fs, dst_path, src_ffd->format, |
| src_ffd->max_files_per_dir, |
| scratch_pool)); |
| |
| /* Copy the UUID. Hotcopy destination receives a new instance ID, but |
| * has the same filesystem UUID as the source. */ |
| SVN_ERR(svn_fs_x__set_uuid(dst_fs, src_fs->uuid, NULL, TRUE, |
| scratch_pool)); |
| |
| /* Remove revision 0 contents. Otherwise, it may not get overwritten |
| * due to having a newer timestamp. */ |
| SVN_ERR(hotcopy_remove_file(svn_fs_x__path_rev(dst_fs, 0, |
| scratch_pool), |
| scratch_pool)); |
| SVN_ERR(hotcopy_remove_file(svn_fs_x__path_revprops(dst_fs, 0, |
| scratch_pool), |
| scratch_pool)); |
| |
| SVN_ERR(svn_fs_x__initialize_shared_data(dst_fs, common_pool_lock, |
| scratch_pool, common_pool)); |
| SVN_ERR(svn_fs_x__initialize_caches(dst_fs, scratch_pool)); |
| } |
| |
| if (cancel_func) |
| SVN_ERR(cancel_func(cancel_baton)); |
| |
| hbb.src_fs = src_fs; |
| hbb.dst_fs = dst_fs; |
| hbb.incremental = incremental; |
| hbb.notify_func = notify_func; |
| hbb.notify_baton = notify_baton; |
| hbb.cancel_func = cancel_func; |
| hbb.cancel_baton = cancel_baton; |
| |
| /* Lock the destination in the incremental mode. For a non-incremental |
| * hotcopy, don't take any locks. In that case the destination cannot be |
| * opened until the hotcopy finishes, and we don't have to worry about |
| * concurrency. */ |
| if (incremental) |
| SVN_ERR(svn_fs_x__with_all_locks(dst_fs, hotcopy_body, &hbb, |
| scratch_pool)); |
| else |
| SVN_ERR(hotcopy_body(&hbb, scratch_pool)); |
| |
| return SVN_NO_ERROR; |
| } |
