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Sean Anderson f96466b055 libsparse: Add "hole" mode to sparse_file_read 
This adds support for filesystem-level sparse files. These files have
holes which are not stored in the filesystem and when read are full of
zeros. While these zeros may be significant in some types of files,
other types of files may not care about the contents of holes. For
example, most filesystem creation tools write to all the blocks they
care about. Those blocks not written to will remain holes, and can be
safely represented by "don't care" chunks. Using "don't care" chunks
instead of fill chunks can result in a substantial reduction of the time
it takes to program a sparse image.

To accomplish this, we extend the existing "sparse" boolean parameter to
be an enum of mode types. This enum represents the strategy we take when
reading in a file. For the most part the implementation is
straightforward. We use lseek to determine where the holes in the file
are, and then use do_sparse_file_read_normal to create chunks for the
data section. Note that every file has an implicit hole at its end.

Change-Id: I0cfbf08886fca9a91cb753ec8734c84fcbe52c9f
2022-01-27 14:49:46 -05:00
bootstat bootstat: add more bootreasons 2021-09-19 19:11:06 +00:00
cli-test [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
code_coverage [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
debuggerd Remove non-protobuf path. 2021-11-19 02:07:30 +00:00
diagnose_usb Support building diagnose_usb against musl 2021-12-16 14:04:06 -08:00
fastboot fastboot: use health AIDL HAL 2021-12-06 23:18:32 -08:00
fs_mgr Merge changes Id0fe51d0,Ie3b3907b 2021-12-17 01:08:29 +00:00
gatekeeperd Depend on KeyMint HAL via default 2021-12-02 08:16:25 +00:00
healthd healthd: *charger_test links to a.h.health@2.x statically. 2021-12-13 14:12:05 -08:00
include Remove include/backtrace symlink. 2020-10-20 12:46:14 -07:00
init Merge "android::base::ResultError/Error are template classes" 2021-12-16 23:54:16 +00:00
janitors Add the two best build system janitors. 2019-03-25 10:25:13 -07:00
libappfuse [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
libasyncio Set min_sdk_version 2021-12-02 09:23:42 +09:00
libbinderwrapper [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
libcrypto_utils Set min_sdk_version 2021-12-02 09:23:42 +09:00
libcutils Merge "Diced: Added AID for Android's dice daemon diced." 2021-12-16 01:47:23 +00:00
libdiskconfig [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
libgrallocusage [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
libkeyutils Make libfs_mgr dependencies vendor_ramdisk_available. 2021-07-23 16:50:06 -07:00
libmodprobe Split up the system/core/ TEST_MAPPING. 2021-08-16 16:37:10 -07:00
libnetutils Move libipchecksum to frameworks/libs/net. 2021-12-16 19:38:01 +00:00
libpackagelistparser Split up the system/core/ TEST_MAPPING. 2021-08-16 16:37:10 -07:00
libprocessgroup libprocessgroup: fall back to cpuset in get_sched_policy 2021-12-14 10:56:34 -08:00
libqtaguid [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
libsparse libsparse: Add "hole" mode to sparse_file_read 2022-01-27 14:49:46 -05:00
libstats Create manager lib for StatsBootstrapAtomService 2021-12-13 19:18:21 -08:00
libsuspend libsuspend: vendor_available. 2021-11-02 13:52:40 -07:00
libsync Replace llndk_library with llndk clause in cc_library 2021-04-21 19:13:41 -07:00
libsystem [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
libsysutils Fix 32-bit userspace on 64-bit kernel quota2 compatibility. 2021-10-25 16:24:49 -07:00
libusbhost [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
libutils libutils: do not follow process's group 2021-12-13 10:05:05 -08:00
libvndksupport Check vendor namespace for SPHAL namespace 2021-11-22 10:57:44 +09:00
llkd llkd: Disable in userdebug builds by default 2021-11-04 16:21:46 -07:00
mini_keyctl Merge "Make libmini_keyctl_static available in recovery" 2021-11-23 17:54:31 +00:00
mkbootfs Rename system/cote/cpio/ -> system/core/mkbootfs/ 2021-05-05 19:03:36 +08:00
property_service remove 'net.qtaguid_enabled' property 2021-11-10 15:52:38 -08:00
reboot [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
rootdir Merge "Create /system_dlkm mount point for GKI modules." 2021-12-16 02:41:24 +00:00
run-as [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
sdcard [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
set-verity-state [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
shell_and_utilities libprocessgroup/tools: Add settaskprofile command-line tool 2021-11-09 22:35:51 +00:00
storaged Merge "storaged: Fix bug in empty check" 2021-12-11 03:07:39 +00:00
toolbox toolbox/generate-input.h-labels.py: python3. 2021-08-17 14:34:55 -07:00
trusty Report Trusty KeyMint as KmVersion::KEYMINT_2 2021-12-15 12:02:06 +00:00
usbd usbd - remove unused libcutils dep 2021-06-28 23:56:29 +00:00
watchdogd [LSC] Add LOCAL_LICENSE_KINDS to system/core 2021-02-19 12:59:05 -08:00
.clang-format Add a 2 width option of clang format. 2017-03-10 13:01:39 -08:00
.clang-format-2 Move clang-formats to build. 2019-01-18 14:26:33 -08:00
.clang-format-4 Move clang-formats to build. 2019-01-18 14:26:33 -08:00
.gitignore Ignore adb/*.pyc files 2015-08-11 12:59:58 -07:00
CleanSpec.mk snapshotctl don't auto-merge. 2020-03-03 13:19:49 -08:00
METADATA Add METADATA to system/core: Apache2+BSD=NOTICE 2020-04-29 13:16:41 -07:00
MODULE_LICENSE_APACHE2 auto import from //depot/cupcake/@135843 2013-07-30 13:56:49 -07:00
OWNERS Remove baligh@ from owners. CodeShuffle done. 2020-10-17 00:28:10 +00:00
PREUPLOAD.cfg Add AOSP preupload hook. 2020-04-23 11:02:00 -07:00