Updated copyright notices to include the year 2018.

lib-fs: Add fs_file/iter_init_parent()

lib-fs: Set fs_iter.flags immediately in fs_iter_init() This way backends don't need to set it.

lib-fs: Split allocation from fs.iter_init() to a separate fs.iter_alloc()

lib-fs: Split allocation from fs.file_init() to a separate fs.file_alloc()

lib: istream-failure-at: Allow setting the the stream_errno to something other than EIO.

global: use i_rand_limit() and i_rand_minmax() when possible

global: Replace rand with i_rand

fs-randomfail: Set errno=EIO when random failure is triggered Previously the errno wasn't set at all. It was especially bad if it happened to be EAGAIN, because that potentially caused hangs.

Updated copyright notices to include the year 2017.

fs-randomfail: Fix failure handling for fs_read()

fs-randomfail: "write" probability was reversed. 0 meant 100% while 100 meant 0%

fs-randomfail: Operation is unfinished on EAGAIN, not ENOENT. This caused crashes and other problems when using randomfail with asynchronous fs drivers.

fs-randomfail: Fixed assert-crash in fs_write_stream_abort_error()

lib-fs: Do not abort parent of parent

lib-fs: Fixes to previous fs_write_stream_abort*() changes.

fs-api: Add and use fs_write_stream_abort_error This lets caller to specify error instead of setting it with fs_error. Doing it like this lets us percolate the error upwards.

lib-fs: Added fs_get_nlinks() Although fs_stat() could return this, its caller can't indicate whether it actually wants the link count. Usually fs_stat() is used only to get the file's size. In some backends it's not cheap to get the link count, so adding this function allows the caller to explicitly ask for it.

lib-fs: Added fs_switch_ioloop()

lib-fs: fs_wait_async() can't fail, so make it return void. The individual requests can timeout, but not the waiting itself.

-Wstrict-bool warning fixes

fs-randomfail: Support failures after asynchronous commands have already finished.

global: Fixed mismatched bool vs. int/pointer handling I don't think these fix any actual bugs.

lib-fs: Don't duplicate backend name in fs_init() errors. fs_init() already adds the "backend: " prefix to the error_r, so the callers shouldn't do it again.

fs-randomfail: Set fs error always when injecting failure. It was done in some places, but not everywhere.

global: freshen copyright git ls-files | xargs perl -p -i -e 's/(\d+)-201[0-5]/$1-2016/g;s/ (201[0-5]) Dovecot/ $1-2016 Dovecot/'

Remove now-unnecessary direct stdlib.h #includes.

lib-fs: Moved enum fs_op from fs-randomfail.c to fs-api-private.h These are useful for other purposes as well.

lib-fs: Removed redundant o_stream_nfinish() calls

lib-fs: Added "randomfail" driver. Using this in front of fs drivers allows randomly injecting failures. For example: mail_attachment_fs = randomfail:all=10,read=30,read-range=2000-3000:sis posix This means that all FS operations have a 10% chance of failing, except reads have a 30% chance of failing. If the read fails, it'll fail somewhere between offsets 2000-3000 (the default is 0, so it'll fail at the start of file). The supported operations are: wait metadata prefetch read write lock exists stat copy rename delete iter. "all" applies to all of them. The supported ranges are: read-range, write-range, iter-range.