11ae768cf1b8348e761ad9c09e98788da1e591b1 |
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25-Mar-2015 |
Christopher Tate <ctate@google.com> |
Add payload-size preflight stage to full transport backup We now peform a total-size preflight pass before committing data to the wire. This is to eliminate the large superfluous network traffic that would otherwise happen if the transport enforces internal quotas: we now instead ask the transport up front whether it's prepared to accept a given payload size for the package. From the app's perspective this preflight operation is indistinguishable from a full-data backup pass. If the app has provided its own full-data handling in a subclassed backup agent, their usual file-providing code path will be executed. However, the files named for backup during this pass are not opened and read; just measured for their total size. As far as component lifecycles, this measurement pass is simply another call to the agent, immediately after it is bound, with identical timeout semantics to the existing full-data backup invocation. Once the app's file set has been measured the preflight operation invokes a new method on BackupTransport, called checkFullBackupSize(). This method is called after performFullBackup() (which applies any overall whitelist/blacklist policy) but before any data is delivered to the transport via sendBackupData(). The return code from checkFullBackupSize() is similar to the other transport methods: TRANSPORT_OK to permit the full backup to proceed; or TRANSPORT_REJECT_PACKAGE to indicate that the requested payload is unacceptable; or TRANSPORT_ERROR to report a more serious overall transport-level problem that prevents a full-data backup operation from occurring right now. The estimated payload currently does not include the size of the source-package metadata (technically, the manifest entry in its archive payload) or the size of any widget metadata associated with the package's install. In practice this means the preflighted size underestimates by 3 to 5 KB. In addition, the preflight API currently cannot distinguish between payload sizes larger than 2 gigabytes; any payload estimate larger than that is passed as Integer.MAX_VALUE to the checkFullBackupSize() query. Bug 19846750 Change-Id: I44498201e2d4b07482dcb3ca8fa6935dddc467ca
/frameworks/base/packages/SharedStorageBackup/src/com/android/sharedstoragebackup/ObbBackupService.java
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7f392defccfae54dc8169e5ad82c2616e0713c8e |
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12-Aug-2013 |
Jeff Sharkey <jsharkey@android.com> |
Catch a few extra users of UserEnvironment. Change-Id: I3112773b72c329893e4118ef1c4f4087d899139e
/frameworks/base/packages/SharedStorageBackup/src/com/android/sharedstoragebackup/ObbBackupService.java
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46cc43c6fa7623820d4ae9149496cf96bb15f8a3 |
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19-Feb-2013 |
Christopher Tate <ctate@google.com> |
Full backup/restore now handles OBBs sensibly OBB backup/ restore is no longer handled within the target app process. This is done to avoid having to require that OBB-using apps have full read/write permission for external storage. The new OBB backup service is a new component running in the same app as the already-existing shared storage backup agent. The backup infrastructure delegates backup/restore of apps' OBB contents to this component (because the system process may not itself read/write external storage). From the command line, OBB backup is enabled by using new -obb / -noobb flags with adb backup. The default is noobb. Finally, a couple of nit fixes: - buffer-size mismatch between the writer and reader of chunked file data has been corrected; now the reading side won't be issuing an extra pipe read per chunk. - bu now explicitly closes the transport socket fd after adopting it. This was benign but triggered a logged warning about leaked fds. Bug: 6718844 Change-Id: Ie252494e2327e9ab97cf9ed87c298410a8618492
/frameworks/base/packages/SharedStorageBackup/src/com/android/sharedstoragebackup/ObbBackupService.java
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