Adam Simpkins 435a0ca2a1 introduce a new InodeMap class ... Summary: This diff starts adding a new InodeMap class. This class will eventually consolidate the functionality of InodeNameMap plus the inode map stored in EdenDispatcher. This new class will bring several new benefits: - All inode mapping logic consolidated into a single class, with a single lock protecting the maps. - A well-defined model for loaded vs unloaded inodes. InodeMap explicitly tracks inodes that have InodeBase objects created for them vs inodes that have an inode number allocated (for FUSE) but do not have an InodeBase object in memory. This will make it possible to unload Inode objects on demand to reduce memory usage. - Tracking of pending loads, and de-duplicating load requests. This ensures that only one Inode object ever exists for a given inode number / path. If a second request to load an Inode arrives when a previous load request is still in progress, InodeMap deals with this situation properly. - Better support for using Inode objects without FUSE. With the old code, attempts to interact with Inode objects without going through the FUSE dispatch (say, when processing a thrift call) could result in inconsistent state. New inodes created would not be put into the EdenDispatcher map, which could result in problems. - More convenient child inode access from TreeInode. With this change, the TreeInode class can easily tell which of its children are loaded. This makes it easier to do tasks which only need to operate on existing loaded inode state (for instance, dirstate computation). - Support for saving and loading state, to implement graceful restart.. InodeMap provides a central place to write out inode state on shutdown and restoring it on startup. Saved inodes can easily be restored to an "unloaded" state on startup. This code is not implemented yet as part of this diff, but it should be straightforward to add in future diffs. Reviewed By: bolinfest Differential Revision: D4318060 fbshipit-source-id: d9b16430fc8367e3516e788d1e991e5163aa6997		2016-12-22 15:36:29 -08:00
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DirstatePersistenceTest.cpp	write dirstate file atomically	2016-12-01 17:52:30 -08:00
DirstateTest.cpp	Use the StatusCode from Thrift as the canonical representation.	2016-12-16 17:49:05 -08:00
EdenMountHandlerTest.cpp	Filter .hg directory on the server when computing getStatus().	2016-12-13 12:00:22 -08:00
InodeBaseTest.cpp	add InodePtr, TreeInodePtr, and FileInodePtr type names	2016-12-12 17:50:35 -08:00
InodeMapTest.cpp	introduce a new InodeMap class	2016-12-22 15:36:29 -08:00
TARGETS	introduce a new InodeMap class	2016-12-22 15:36:29 -08:00