Am 13.11.2014 um 13:38 hat Markus Armbruster geschrieben:
> Kevin Wolf writes:
>
> > Am 13.11.2014 um 12:45 hat Max Reitz geschrieben:
> >> On 2014-11-13 at 12:40, Kevin Wolf wrote:
> >> >Am 13.11.2014 um 00:25 hat Eric Blake geschrieben:
> >> >>On 11/12/2014 01:27 PM, Markus Armbruster wrote:
>
Kevin Wolf writes:
> Am 13.11.2014 um 12:45 hat Max Reitz geschrieben:
>> On 2014-11-13 at 12:40, Kevin Wolf wrote:
>> >Am 13.11.2014 um 00:25 hat Eric Blake geschrieben:
>> >>On 11/12/2014 01:27 PM, Markus Armbruster wrote:
>> >>>+/* in hole, end not yet known */
>> >>>+offs = lseek(s->f
On 2014-11-13 at 13:00, Kevin Wolf wrote:
Am 13.11.2014 um 12:45 hat Max Reitz geschrieben:
On 2014-11-13 at 12:40, Kevin Wolf wrote:
Am 13.11.2014 um 00:25 hat Eric Blake geschrieben:
On 11/12/2014 01:27 PM, Markus Armbruster wrote:
+/* in hole, end not yet known */
+offs = lseek(s->
Am 13.11.2014 um 12:45 hat Max Reitz geschrieben:
> On 2014-11-13 at 12:40, Kevin Wolf wrote:
> >Am 13.11.2014 um 00:25 hat Eric Blake geschrieben:
> >>On 11/12/2014 01:27 PM, Markus Armbruster wrote:
> >>>+/* in hole, end not yet known */
> >>>+offs = lseek(s->fd, start, SEEK_DATA);
> >>>+
On 2014-11-13 at 12:40, Kevin Wolf wrote:
Am 13.11.2014 um 00:25 hat Eric Blake geschrieben:
On 11/12/2014 01:27 PM, Markus Armbruster wrote:
+/* in hole, end not yet known */
+offs = lseek(s->fd, start, SEEK_DATA);
+if (offs < 0) {
+/* no idea where the hole ends, give up (
Am 13.11.2014 um 00:25 hat Eric Blake geschrieben:
> On 11/12/2014 01:27 PM, Markus Armbruster wrote:
> > +/* in hole, end not yet known */
> > +offs = lseek(s->fd, start, SEEK_DATA);
> > +if (offs < 0) {
> > +/* no idea where the hole ends, give up (unlikely to happen) */
> > +
Max Reitz writes:
> On 2014-11-12 at 20:27, Markus Armbruster wrote:
>> Commit 5500316 (May 2012) implemented raw_co_is_allocated() as
>> follows:
>>
>> 1. If defined(CONFIG_FIEMAP), use the FS_IOC_FIEMAP ioctl
>>
>> 2. Else if defined(SEEK_HOLE) && defined(SEEK_DATA), use lseek()
>>
>> 3. Else p
Eric Blake writes:
> On 11/12/2014 01:27 PM, Markus Armbruster wrote:
>> Commit 5500316 (May 2012) implemented raw_co_is_allocated() as
>> follows:
>>
>
>> Thus, the FIEMAP code executes rarely. Makes it a nice hidey-hole for
>> bugs. Worse, bugs hiding there can theoretically bite even on a h
On 2014-11-12 at 20:27, Markus Armbruster wrote:
Commit 5500316 (May 2012) implemented raw_co_is_allocated() as
follows:
1. If defined(CONFIG_FIEMAP), use the FS_IOC_FIEMAP ioctl
2. Else if defined(SEEK_HOLE) && defined(SEEK_DATA), use lseek()
3. Else pretend there are no holes
Later on, raw_
Fam Zheng writes:
> On Wed, 11/12 20:27, Markus Armbruster wrote:
>> Commit 5500316 (May 2012) implemented raw_co_is_allocated() as
>> follows:
>>
>> 1. If defined(CONFIG_FIEMAP), use the FS_IOC_FIEMAP ioctl
>>
>> 2. Else if defined(SEEK_HOLE) && defined(SEEK_DATA), use lseek()
>>
>> 3. Else p
On 11/12/2014 01:27 PM, Markus Armbruster wrote:
> Commit 5500316 (May 2012) implemented raw_co_is_allocated() as
> follows:
>
> Thus, the FIEMAP code executes rarely. Makes it a nice hidey-hole for
> bugs. Worse, bugs hiding there can theoretically bite even on a host
> that has SEEK_HOLE/SEEK
On Wed, 11/12 20:27, Markus Armbruster wrote:
> Commit 5500316 (May 2012) implemented raw_co_is_allocated() as
> follows:
>
> 1. If defined(CONFIG_FIEMAP), use the FS_IOC_FIEMAP ioctl
>
> 2. Else if defined(SEEK_HOLE) && defined(SEEK_DATA), use lseek()
>
> 3. Else pretend there are no holes
>
>
Commit 5500316 (May 2012) implemented raw_co_is_allocated() as
follows:
1. If defined(CONFIG_FIEMAP), use the FS_IOC_FIEMAP ioctl
2. Else if defined(SEEK_HOLE) && defined(SEEK_DATA), use lseek()
3. Else pretend there are no holes
Later on, raw_co_is_allocated() was generalized to
raw_co_get_blo
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