The essential idea here is that a handler thread only needs to
hold a lock on the global node table while it is manipulating
nodes. The actual I/O operation is then performed without
holding any locks.
By default, we use 2 threads but this can be configured on the
command-line. Work is sheduled somewhat arbitrarily by the
handler threads. Whichever thread happens to read() the next
request first wins the right process it. This policy is very
simple but potentially wastes threads when there isn't much
work to be done. We can always improve this later if needed.
Change-Id: Id27a27c2c9b40d4f8e35a6bef9dd84f0dfacf337
sdcard is a program that uses FUSE to emulate FAT-on-sdcard style
directory permissions (all files are given fixed owner, group, and
permissions at creation, owner, group, and permissions are not
changeable, symlinks and hardlinks are not createable, etc.
usage: sdcard <path> <uid> <gid>
It must be run as root, but will change to uid/gid as soon as it
mounts a filesystem on /sdcard. It will refuse to run if uid or
gid are zero.
Change-Id: I9a5d2e5daaebeee632f8470172cbb77b7fa689f8
Signed-off-by: Brian Swetland <swetland@google.com>
Jeff Brown