- 31 5月, 2018 2 次提交
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由 Adam Manzanares 提交于
In order to avoid kiocb bloat for per command iopriority support, rw_hint is converted from enum to a u16. Added a guard around ki_hint assignment. Signed-off-by: NAdam Manzanares <adam.manzanares@wdc.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Adam Manzanares 提交于
Aio per command iopriority support introduces a second interface between userland and the kernel capable of passing iopriority. The aio interface also needs the ability to verify that the submitting context has sufficient privileges to submit IOPRIO_RT commands. This patch creates the ioprio_check_cap function to be used by the ioprio_set system call and also by the aio interface. Signed-off-by: NAdam Manzanares <adam.manzanares@wdc.com> Reviewed-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NJeff Moyer <jmoyer@redhat.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 30 5月, 2018 6 次提交
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由 Al Viro 提交于
as it is, the logics in native io_submit(2) is "if asked for more than LONG_MAX/sizeof(pointer) iocbs to submit, don't bother with more than LONG_MAX/sizeof(pointer)" (i.e. 512M requests on 32bit and 1E requests on 64bit) while compat io_submit(2) goes with "stop after the first PAGE_SIZE/sizeof(pointer) iocbs", i.e. 1K or so. Which is * inconsistent * *way* too much in native case * possibly too little in compat one and * wrong anyway, since the natural point where we ought to stop bothering is ctx->nr_events Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
get rid of insane "copy array of 32bit pointers into an array of native ones" glue. Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
The logics for 'avail' is * not past the tail of cyclic buffer * no more than asked * not past the end of buffer * not past the end of a page Unobfuscate the last part. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
... so just make them return 0 when caller does not need to destroy iocb Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
We really want iocb out of io_cancel(2) reach before we start tearing it down. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 29 5月, 2018 1 次提交
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由 Christoph Hellwig 提交于
Looks like this got lost in a merge. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 26 5月, 2018 31 次提交
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由 Christoph Hellwig 提交于
The big change is that random_read_wait and random_write_wait are merged into a single waitqueue that uses keyed wakeups. Because wait_event_* doesn't know about that this will lead to occassional spurious wakeups in _random_read and add_hwgenerator_randomness, but wait_event_* is designed to handle these and were are not in a a hot path there. Signed-off-by: NChristoph Hellwig <hch@lst.de> Acked-by: NTheodore Ts'o <tytso@mit.edu> Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Now that sock_poll handles a NULL ->poll or ->poll_mask there is no need for a stub. Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
The socket file operations still implement ->poll until all protocols are switched over. Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Factor out two busy poll related helpers for late reuse, and remove a command that isn't very helpful, especially with the __poll_t annotations in place. Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
If we can acquire ctx_lock without spinning we can just remove our iocb from the active_reqs list, and thus complete the iocbs from the wakeup context. Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
Simple one-shot poll through the io_submit() interface. To poll for a file descriptor the application should submit an iocb of type IOCB_CMD_POLL. It will poll the fd for the events specified in the the first 32 bits of the aio_buf field of the iocb. Unlike poll or epoll without EPOLLONESHOT this interface always works in one shot mode, that is once the iocb is completed, it will have to be resubmitted. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com>
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由 Christoph Hellwig 提交于
With the current aio code there is no need for the magic KIOCB_CANCELLED value, as a cancelation just kicks the driver to queue the completion ASAP, with all actual completion handling done in another thread. Given that both the completion path and cancelation take the context lock there is no need for magic cmpxchg loops either. If we remove iocbs from the active list after calling ->ki_cancel (but with ctx_lock still held), we can also rely on the invariant thay anything found on the list has a ->ki_cancel callback and can be cancelled, further simplifing the code. Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
No need to pass the key field to lookup_iocb to compare it with KIOCB_KEY, as we can do that right after retrieving it from userspace. Also move the KIOCB_KEY definition to aio.c as it is an internal value not used by any other place in the kernel. Signed-off-by: NChristoph Hellwig <hch@lst.de>
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由 Christoph Hellwig 提交于
->get_poll_head returns the waitqueue that the poll operation is going to sleep on. Note that this means we can only use a single waitqueue for the poll, unlike some current drivers that use two waitqueues for different events. But now that we have keyed wakeups and heavily use those for poll there aren't that many good reason left to keep the multiple waitqueues, and if there are any ->poll is still around, the driver just won't support aio poll. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com>
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由 Christoph Hellwig 提交于
These abstract out calls to the poll method in preparation for changes in how we poll. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com> Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Christoph Hellwig 提交于
Use straightline code with failure handling gotos instead of a lot of nested conditionals. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com>
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由 Christoph Hellwig 提交于
No users outside of select.c. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com>
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