From b3612e9cc198f198b3806efa461bf6fc04dd4502 Mon Sep 17 00:00:00 2001 From: Dan McGee Date: Wed, 11 Jan 2012 15:39:52 -0600 Subject: Allow UseDelta option to specify a delta ratio Rework the frontend and backend to allow passing a ratio value in for UseDelta rather than having a hardcoded #define-d 0.7 value always used. This is useful for those with fast connections, who would likely benefit from tuning this ratio to lower values; it is also useful for general testing purposes. The libalpm API changes for this, but we do support the old config file format with a no-value 'UseDelta' option; in this case we simply use the old default of 0.7. We clamp the ratio values to a sane range between 0.0 and 2.0, allowing ratios above 1.0 for testing purposes. Signed-off-by: Dan McGee --- lib/libalpm/alpm.h | 4 ++-- lib/libalpm/delta.c | 3 ++- lib/libalpm/delta.h | 3 --- lib/libalpm/handle.c | 12 ++++++++---- lib/libalpm/handle.h | 2 +- lib/libalpm/sync.c | 4 ++-- 6 files changed, 15 insertions(+), 13 deletions(-) (limited to 'lib/libalpm') diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h index 95c817ea..9ffdebc5 100644 --- a/lib/libalpm/alpm.h +++ b/lib/libalpm/alpm.h @@ -535,8 +535,8 @@ const char *alpm_option_get_arch(alpm_handle_t *handle); /** Sets the targeted architecture. */ int alpm_option_set_arch(alpm_handle_t *handle, const char *arch); -int alpm_option_get_usedelta(alpm_handle_t *handle); -int alpm_option_set_usedelta(alpm_handle_t *handle, int usedelta); +double alpm_option_get_deltaratio(alpm_handle_t *handle); +int alpm_option_set_deltaratio(alpm_handle_t *handle, double ratio); int alpm_option_get_checkspace(alpm_handle_t *handle); int alpm_option_set_checkspace(alpm_handle_t *handle, int checkspace); diff --git a/lib/libalpm/delta.c b/lib/libalpm/delta.c index 726f03c0..e3acc666 100644 --- a/lib/libalpm/delta.c +++ b/lib/libalpm/delta.c @@ -264,7 +264,8 @@ static alpm_list_t *find_unused(alpm_list_t *deltas, const char *to, off_t quota alpm_list_t SYMEXPORT *alpm_pkg_unused_deltas(alpm_pkg_t *pkg) { ASSERT(pkg != NULL, return NULL); - return find_unused(pkg->deltas, pkg->filename, pkg->size * MAX_DELTA_RATIO); + return find_unused(pkg->deltas, pkg->filename, + pkg->size * pkg->handle->deltaratio); } /** @} */ diff --git a/lib/libalpm/delta.h b/lib/libalpm/delta.h index 1173ddfe..37f208b0 100644 --- a/lib/libalpm/delta.h +++ b/lib/libalpm/delta.h @@ -30,9 +30,6 @@ alpm_delta_t *_alpm_delta_dup(const alpm_delta_t *delta); off_t _alpm_shortest_delta_path(alpm_handle_t *handle, alpm_list_t *deltas, const char *to, alpm_list_t **path); -/* max percent of package size to download deltas */ -#define MAX_DELTA_RATIO 0.7 - #endif /* _ALPM_DELTA_H */ /* vim: set ts=2 sw=2 noet: */ diff --git a/lib/libalpm/handle.c b/lib/libalpm/handle.c index 8e2e3c73..2187dca9 100644 --- a/lib/libalpm/handle.c +++ b/lib/libalpm/handle.c @@ -43,6 +43,7 @@ alpm_handle_t *_alpm_handle_new(void) alpm_handle_t *handle; CALLOC(handle, 1, sizeof(alpm_handle_t), return NULL); + handle->deltaratio = 0.0; return handle; } @@ -252,10 +253,10 @@ const char SYMEXPORT *alpm_option_get_arch(alpm_handle_t *handle) return handle->arch; } -int SYMEXPORT alpm_option_get_usedelta(alpm_handle_t *handle) +double SYMEXPORT alpm_option_get_deltaratio(alpm_handle_t *handle) { CHECK_HANDLE(handle, return -1); - return handle->usedelta; + return handle->deltaratio; } int SYMEXPORT alpm_option_get_checkspace(alpm_handle_t *handle) @@ -597,10 +598,13 @@ int SYMEXPORT alpm_option_set_arch(alpm_handle_t *handle, const char *arch) return 0; } -int SYMEXPORT alpm_option_set_usedelta(alpm_handle_t *handle, int usedelta) +int SYMEXPORT alpm_option_set_deltaratio(alpm_handle_t *handle, double ratio) { CHECK_HANDLE(handle, return -1); - handle->usedelta = usedelta; + if(ratio < 0.0 || ratio > 2.0) { + RET_ERR(handle, ALPM_ERR_WRONG_ARGS, -1); + } + handle->deltaratio = ratio; return 0; } diff --git a/lib/libalpm/handle.h b/lib/libalpm/handle.h index a64c5c9e..a090ae42 100644 --- a/lib/libalpm/handle.h +++ b/lib/libalpm/handle.h @@ -88,8 +88,8 @@ struct __alpm_handle_t { /* options */ char *arch; /* Architecture of packages we should allow */ + double deltaratio; /* Download deltas if possible; a ratio value */ int usesyslog; /* Use syslog instead of logfile? */ /* TODO move to frontend */ - int usedelta; /* Download deltas if possible */ int checkspace; /* Check disk space before installing */ alpm_siglevel_t siglevel; /* Default signature verification level */ diff --git a/lib/libalpm/sync.c b/lib/libalpm/sync.c index 49a3f42d..6967b49b 100644 --- a/lib/libalpm/sync.c +++ b/lib/libalpm/sync.c @@ -318,13 +318,13 @@ static int compute_download_size(alpm_pkg_t *newpkg) /* tell the caller that we have a partial */ ret = 1; - } else if(handle->usedelta) { + } else if(handle->deltaratio > 0.0) { off_t dltsize; dltsize = _alpm_shortest_delta_path(handle, newpkg->deltas, newpkg->filename, &newpkg->delta_path); - if(newpkg->delta_path && (dltsize < newpkg->size * MAX_DELTA_RATIO)) { + if(newpkg->delta_path && (dltsize < newpkg->size * handle->deltaratio)) { _alpm_log(handle, ALPM_LOG_DEBUG, "using delta size\n"); size = dltsize; } else { -- cgit v1.2.3-24-g4f1b