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2016-08-03util: Fix assertion in iov_copy() upon zero 'bytes' and non-zero 'offset'Shmulik Ladkani1-1/+2
In cases where iov_copy() is passed with zero 'bytes' argument and a non-zero 'offset' argument, nothing gets copied - as expected. However no copy iterations are performed, so 'offset' is left unaltered, leading to the final assert(offset == 0) to fail. Instead, change the loop condition to continue as long as 'offset || bytes', similar to other iov_* functions. This ensures 'offset' gets zeroed (even if no actual copy is made), unless it is beyond end of source iov - which is asserted. Signed-off-by: Shmulik Ladkani <shmulik.ladkani@ravellosystems.com> Message-Id: <1470130880-1050-1-git-send-email-shmulik.ladkani@oracle.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22util: move declarations out of qemu-common.hVeronia Bahaa1-0/+1
Move declarations out of qemu-common.h for functions declared in utils/ files: e.g. include/qemu/path.h for utils/path.c. Move inline functions out of qemu-common.h and into new files (e.g. include/qemu/bcd.h) Signed-off-by: Veronia Bahaa <veroniabahaa@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22include/qemu/iov.h: Don't include qemu-common.hMarkus Armbruster1-0/+1
qemu-common.h should only be included by .c files. Its file comment explains why: "No header file should depend on qemu-common.h, as this would easily lead to circular header dependencies." qemu/iov.h includes qemu-common.h for QEMUIOVector stuff. Move all that to qemu/iov.h and drop the ill-advised include. Include qemu/iov.h where the QEMUIOVector stuff is now missing. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-09iov: avoid memcpy for "simple" iov_from_buf/iov_to_bufPaolo Bonzini1-4/+4
memcpy can take a large amount of time for small reads and writes. For virtio it is a common case that the first iovec can satisfy the whole read or write. In that case, and if bytes is a constant to avoid excessive growth of code, inline the first iteration into the caller. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1450782213-14227-1-git-send-email-pbonzini@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-02-04util: Clean up includesPeter Maydell1-0/+1
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454089805-5470-6-git-send-email-peter.maydell@linaro.org
2015-06-23iov: don't touch iov in iov_send_recv()Wen Congyang1-1/+13
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Message-id: 555D39D2.4000705@cn.fujitsu.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-12-10util: Use g_new() & friends where that makes obvious senseMarkus Armbruster1-2/+2
g_new(T, n) is neater than g_malloc(sizeof(T) * n). It's also safer, for two reasons. One, it catches multiplication overflowing size_t. Two, it returns T * rather than void *, which lets the compiler catch more type errors. This commit only touches allocations with size arguments of the form sizeof(T). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-07-14dma-helpers: Fix too long qiovKevin Wolf1-0/+13
If the size of the scatter/gather list isn't a multiple of 512, the number of sectors for the block layer request is rounded down, resulting in a qiov that doesn't match the request length. Truncate the qiov to the new length of the request. This fixes the IDE qtest case /x86_64/ide/bmdma/short_prdt. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2014-06-18util: add return value to qemu_iovec_concat_iovPaolo Bonzini1-4/+6
This will be necessary later to recognize the case where a request has both dataout and datain. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-19util: add qemu_iovec_is_zeroPeter Lieven1-0/+21
Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-03-03util/iov: Use qemu/sockets.h instead of conditional codeStefan Weil1-8/+1
Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-02-21blkverify: Extract qemu_iovec_clone() and qemu_iovec_compare() from blkverify.Benoît Canet1-0/+106
qemu_iovec_compare() will be used to compare IOs vectors in quorum blkverify mode. The patch extracts these functions in order to factorize the code. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-20iov: avoid "orig_len may be used unitialized" warningMichael Tokarev1-6/+4
Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-08-06iov: handle EOF in iov_send_recvMORITA Kazutaka1-0/+6
Without this patch, iov_send_recv() never returns when do_send_recv() returns zero. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-05-20Rename hexdump to avoid FreeBSD libutil conflictEd Maste1-1/+1
On FreeBSD libutil is used for openpty(), but it also provides a hexdump() which conflicts with QEMU's. Signed-off-by: Ed Maste <emaste@freebsd.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1368718348-15199-1-git-send-email-emaste@freebsd.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-29win32: add readv/writev emulationPaolo Bonzini1-1/+1
Commit e9d8fbf (qemu-file: do not use stdio for qemu_fdopen, 2013-03-27) introduced a usage of writev, which mingw32 does not have. Even though qemu_fdopen itself is not used on mingw32, the future-proof solution is to add an implementation of it. This is simple and similar to how we emulate sendmsg/recvmsg in util/iov.c. Some files include osdep.h without qemu-common.h, so move the definition of iovec to osdep.h too, and include osdep.h from qemu-common.h unconditionally (protection against including files when NEED_CPU_H is defined is not needed since the removal of AREG0). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-17iov: handle partial writes from sendmsg and recvmsgPaolo Bonzini1-47/+55
Partial writes can still happen in sendmsg and recvmsg, if a signal is received in the middle of a write. To handle this, retry the operation with a new offset/bytes pair. Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Orit Wassermann <owasserm@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-17iov: reorganize iov_send_recv, part 3Paolo Bonzini1-15/+15
"si" and "ei" are merged in a single variable. Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Orit Wassermann <owasserm@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-17iov: reorganize iov_send_recv, part 2Paolo Bonzini1-14/+14
Do not touch the "bytes" argument anymore. Instead, remember the original length of the last iovec if we touch it, and restore it afterwards. This requires undoing the changes in opposite order. The previous algorithm didn't care. Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Orit Wassermann <owasserm@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-17iov: reorganize iov_send_recv, part 1Paolo Bonzini1-7/+13
Once the initial part of the iov is dropped, it is not used anymore. Modify iov/iovcnt directly instead of adjusting them with the "si" variable. Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Orit Wassermann <owasserm@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-03-15iov: Factor out hexdumperPeter Crosthwaite1-25/+11
Factor out the hexdumper functionality from iov for all to use. Useful for creating verbose debug printfery that dumps packet data. Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Message-id: faaac219c55ea586d3f748befaf5a2788fd271b8.1361853677.git.peter.crosthwaite@xilinx.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-02-06qemu/iovec: Don't assert if sbytes is zeroAneesh Kumar K.V1-0/+4
Since these values can possibly be sent from guest (for hw/9pfs), do a sanity check on them. A 9p write request with 0 bytes caused qemu to abort without this patch Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-12build: move libqemuutil.a components to util/Paolo Bonzini1-0/+422
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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