Re: [Qemu-devel] d_off field in struct dirent and 32-on-64 emulation

2018-12-28 Thread Matthew Wilcox
On Sat, Dec 29, 2018 at 12:12:27AM +, Peter Maydell wrote: > On Fri, 28 Dec 2018 at 23:16, Andreas Dilger wrot > > On Dec 28, 2018, at 4:18 AM, Peter Maydell wrote: > > > The problem is that there is no 32-bit API in some cases > > > (unless I have misunderstood the kernel code) -- not all >

Re: [Qemu-devel] d_off field in struct dirent and 32-on-64 emulation

2018-12-28 Thread Theodore Y. Ts'o
On Fri, Dec 28, 2018 at 11:18:18AM +, Peter Maydell wrote: > In general inodes and offsets start from 0 and work up -- > so almost all of the time they don't actually overflow. > The problem with ext4 directory hash "offsets" is that they > overflow all the time and immediately, so instead of "

Re: [Qemu-devel] d_off field in struct dirent and 32-on-64 emulation

2018-12-28 Thread Dominique Martinet
Theodore Y. Ts'o wrote on Fri, Dec 28, 2018: > > The problem is that there is no 32-bit API in some cases > > (unless I have misunderstood the kernel code) -- not all > > host architectures implement compat syscalls or allow them > > to be called from 64-bit processes or implement all the older > >

Re: [Qemu-devel] d_off field in struct dirent and 32-on-64 emulation

2018-12-28 Thread Theodore Y. Ts'o
On Sat, Dec 29, 2018 at 03:37:21AM +0100, Dominique Martinet wrote: > > Are there going to be cases where a process or a thread will sometimes > > want the 64-bit interface, and sometimes want the 32-bit interface? > > Or is it always going to be one or the other? I wonder if we could > > simply a

Re: [Qemu-devel] [V9fs-developer] d_off field in struct dirent and 32-on-64 emulation

2018-12-28 Thread Dominique Martinet
Theodore Y. Ts'o wrote on Fri, Dec 28, 2018: > On Sat, Dec 29, 2018 at 03:37:21AM +0100, Dominique Martinet wrote: > > > Are there going to be cases where a process or a thread will sometimes > > > want the 64-bit interface, and sometimes want the 32-bit interface? > > > Or is it always going to be

[Qemu-devel] Passing NFS volume on host to win7 guest

2018-12-28 Thread liebrecht
Hope I dont have to use samba for this. From reading online searches, it seems the following could work where backup is the nfs exported volume to be shared. -virtfs local,path=/backup,mount_tag=host0,security_model=passthrough,id=host0 qemu boots into win7 with this string added so it was

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