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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 <dan@archlinux.org>
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This reduces the number of regcomp() calls when parsing delta entries in
the database from once per entry to once for the entire context handle
by storing the compiled regex data on the handle itself. Just as we do
with the cURL handle, we initialize it the first time it is needed and
free it when releasing the handle.
A few other small tweaks to the parsing function also take place,
including using the stack to store the transient and short file size
string while parsing it.
When parsing a sync database with 1378 delta entries, this reduces the
time of a `pacman -Sl deltas` operation by 50% from 0.22s to 0.12s.
Signed-off-by: Dan McGee <dan@archlinux.org>
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In commit 4c5e7af32f9, we changed this code to use the regex gathered
substrings. However, we failed to correctly store the delta file name
(leaking memory), as well as freeing the temporary string used to hold
the file size string.
Signed-off-by: Dan McGee <dan@archlinux.org>
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Ensures that config.h is always ordered correctly (first) in the
includes. Also means that new source files get this for free without
having to remember to add it.
We opt for -imacros over -include as its more portable, and the
added constraint by -imacros doesn't bother us for config.h.
This also touches the HACKING file to remove the explicit mention of
config.h as part of the includes.
Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>
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Similar to an earlier commit which accounts for .part files for full
packages, calculate the download_size for deltas keeping mind the
possibility of a partial transfer.
Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>
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Neither deltas nor filename attributes are ever present in the local
database, so we can remove all of the indirection for accessing these
attributes.
Signed-off-by: Dan McGee <dan@archlinux.org>
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We currently have csize, isize, and size concepts, and sometimes the
difference isn't clear. Ensure the following holds:
* size (aka csize): always the compressed size of the package; available
for everything except local packages (where it will return 0)
* isize: always the installed size of the package; available for all
three package types
Signed-off-by: Dan McGee <dan@archlinux.org>
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We were using atol(), which on 32 bit, cannot handle values greater than
2GiB, which is fail.
Switch to a strtoull() wrapper function tailored toward parsing off_t
values. This allows parsing of very large positive integer values. off_t
is a signed type, but in our usages, we never parse or have a need for
negative values, so the function will return -1 on error.
Before:
$ pacman -Si flightgear-data | grep Size
Download Size : 2097152.00 K
Installed Size : 2097152.00 K
After:
$ ./src/pacman/pacman -Si flightgear-data | grep Size
Download Size : 2312592.52 KiB
Installed Size : 5402896.00 KiB
Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Allan McRae <allan@archlinux.org>
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Signed-off-by: Allan McRae <allan@archlinux.org>
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Signed-off-by: Allan McRae <allan@archlinux.org>
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Signed-off-by: Allan McRae <allan@archlinux.org>
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Signed-off-by: Allan McRae <allan@archlinux.org>
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We were using copy_data before; this works for the struct itself but not
the strings contained within. Fix it up by duplicating all the data as
we do with our other structures.
Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Dan McGee <dan@archlinux.org>
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This is the last user of our global handle object. Once again the diff
is large but the functional changes are not.
Signed-off-by: Dan McGee <dan@archlinux.org>
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This involves some serious changes and a very messy diff, unfortunately.
Signed-off-by: Dan McGee <dan@archlinux.org>
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This requires a lot of line changes, but not many functional changes as
more often than not our handle variable is already available in some
fashion.
Signed-off-by: Dan McGee <dan@archlinux.org>
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The usefulness of this is rather limited due to it not being compiled
into production builds. When you do choose to see the output, it is
often overwhelming and not helpful. The best bet is to use a debugger
and/or well-placed fprintf() statements.
Signed-off-by: Dan McGee <dan@archlinux.org>
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This was discussed and more or less agreed upon on the mailing list. A
huge checkin, but if we just do it and let people adjust the pain will
end soon enough. Rebasing should be relatively straighforward for anyone
that sees conflicts; just be sure you use the new return style if
possible.
The following semantic patch was used to do the change, along with some
hand-massaging in order to preserve parenthesis where appropriate:
The semantic match that finds this problem is as follows, although some
hand-massaging was done in order to keep parenthesis where appropriate:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression a;
@@
- return(a);
+ return a;
// </smpl>
A macros_file was also provided with the following content:
Additional steps taken, mainly for ASSERT() macros:
$ sed -i -e 's#return(NULL)#return NULL#' lib/libalpm/*.c
$ sed -i -e 's#return(-1)#return -1#' lib/libalpm/*.c
Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>
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time_t : %ld
off_t : %jd and cast to intmax_t
Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>
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This will make the code re-usable for other purpose.
Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Dan McGee <dan@archlinux.org>
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1) The changes to sync.c look big but there are mostly caused by
the indentation. Fix a bug where download_size == 0 because the packages and
deltas are already in the cache, but we still need to build the deltas list
and apply the deltas to create the final package.
2) Fix the gzip / md5sum issue by switching to xdelta3, disabling external
recompression and using gzip -n in pacman, and disable bsdtar compression
and using gzip -n in makepkg.
Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
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The from_md5 and to_md5 fields were a nice extra safety, which would avoid
trying to apply deltas on corrupted package files. However, they are not
strictly necessary, since xdelta should be able to detect that on its own.
The main problem is that it is impossible to compute these informations from
the delta only. So repo-add would not be able to compute the delta entry
based on just the delta file.
Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>
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alpm_dep_compute_string
This patch introduces the following function name convention:
_compute_ in function name: the return value must be freed.
_get_ in function name: the return value must not be freed.
Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu>
Signed-off-by: Dan McGee <dan@archlinux.org>
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If the delta line doesn't match our regex, we won't go and process it,
possibly walking off the end of the string.
Signed-off-by: Dan McGee <dan@archlinux.org>
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We have been using unsigned long as a file size type for a while, which
works but isn't quite correct and could easily break. Worse was probably our
use of int in the download callback functions, which could be restrictive
for packages > 2GB in size.
Switch all file size variables to use off_t, which is the preferred type for
file sizes. Note that at least on Linux, all applications compiled against
libalpm must now be sure to use large file support, where _FILE_OFFSET_BITS
is defined to be 64 or there will be some weird issues that crop up.
Signed-off-by: Dan McGee <dan@archlinux.org>
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Using the graph structures that Nagy set up for dependency sorting, we now
do a similar process for deltas. Load up all of the deltas into a graph
object on which we can then apply Dijkstra's algorithm, using the new weight
field of graph struct.
We initialize the nodes weight using the base files that we can use in our
filecache (both filename and md5sum must match). The algorithm then picks
the best path among those that can be resolved.
Note that this algorithm has a few advantages over the old one:
1. It is completely file agnostic. These delta chains do not have to consist
of package files- this could be adopted to do delta-fied DBs.
2. It does not use the local_db anymore, or even care if a package or file
is currently installed. Instead, it only looks in the filecache for files
and packages that match delta chain entries.
Original-work-by: Dan McGee <dan@archlinux.org>
Signed-off-by: Chantry Xavier <shiningxc@gmail.com>
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Start to move the delta struct away from an assumed package name scheme and
towards something that is package (or even filename) agnostic. This will
allow us much greater flexibility in the usage of deltas (maybe even sync
DBs some day) as well as allowing code outside of delta.h/delta.c to be much
cleaner with less of a need for snprintf() calls.
Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Dan McGee <dan@archlinux.org>
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Another elimination of a static length structure in libalpm. Should result
in a little more memory saved during execution of packages with lots of
deltas attached.
Signed-off-by: Dan McGee <dan@archlinux.org>
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It is possible for the if statement to never succeed, causing path to
never be freed. It is also possible for the if statement to succeed more
than once per loop, which could have caused a segfault.
Signed-off-by: Nathan Jones <nathanj@insightbb.com>
Signed-off-by: Dan McGee <dan@archlinux.org>
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Update the GPL boilerplate to direct people to the GNU website for a copy of
the license, as well as bump all of Judd's copyrights to 2007.
Signed-off-by: Dan McGee <dan@archlinux.org>
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The old alpm_list_find was renamed to alpm_list_find_ptr, and a new
alpm_list_find was introduced, which uses the fn comparison-function
parameter in its decision.
Now both alpm_list_find_ptr (a new ptrcmp helper function was also
added) and alpm_list_find_str are just an alpm_list_find call.
Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu>
Signed-off-by: Chantry Xavier <shiningxc@gmail.com>
[Dan: made ptrcmp a static function]
Signed-off-by: Dan McGee <dan@archlinux.org>
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Run the kernel's cleanfile script on all of our source files.
Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Dan McGee <dan@archlinux.org>
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These macros take the place of the common 4 or 5 line blocks of code we had
in most places that called malloc or calloc. This should reduce some code
duplication and make memory allocation more standard in libalpm.
Highlights:
* Note that the MALLOC macro actually uses calloc, this is just for safety
so that memory is initialized to 0. This can be easily changed in one
place.
* One malloc call was completely eliminated- it made more sense to do it
on the stack.
* The use of RET_ERR in public functions (mainly the alpm_*_new functions)
was standardized, this makes sense so pm_errno is set.
Signed-off-by: Dan McGee <dan@archlinux.org>
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Signed-off-by: Nathan Jones <nathanj@insightbb.com>
Signed-off-by: Dan McGee <dan@archlinux.org>
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