Bug 762417 (GLUSTER-685)

Summary:	writing to a file fails complaining of "Transport endpoint not being connected"
Product:	[Community] GlusterFS	Reporter:	Raghavendra G <raghavendra>
Component:	quota	Assignee:	Raghavendra G <raghavendra>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	mainline	CC:	gluster-bugs, rabhat, shehjart
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Raghavendra G 2010-02-25 10:36:47 UTC

quota in its write call does,
1. gets stat of the file.
2. continues with write if quota is not exceeded.

between 1 and 2, the arguments are stored in a structure stored in frame->local. While doing so, the pointer to vector is stored instead of copying the entire vector structure. This results in accessing invalid memory during 2, hence causing invalid iov_base and iov_len. Due to this transport may not transfer the buffer, since iov_len may be arbitrarily high.

Comment 1 Anand Avati 2010-03-02 13:22:00 UTC

PATCH: http://patches.gluster.com/patch/2818 in master (features/quota: store the entire vector in local instead of just a pointer to it in writev.)

Comment 2 Anand Avati 2010-03-02 13:22:07 UTC

PATCH: http://patches.gluster.com/patch/2855 in master (features/quota: Remember '/' loc_t to initiate xattr calls.)

Comment 3 Anand Avati 2010-03-02 13:22:11 UTC

PATCH: http://patches.gluster.com/patch/2819 in release-2.0 (features/quota: store the entire vector in local instead of just a pointer to it in writev.)

Comment 4 Anand Avati 2010-03-02 13:22:19 UTC

PATCH: http://patches.gluster.com/patch/2857 in release-3.0 (features/quota: Remember '/' loc_t to initiate xattr calls.)

Comment 5 Anand Avati 2010-03-11 04:25:38 UTC

PATCH: http://patches.gluster.com/patch/2818 in release-3.0 (features/quota: store the entire vector in local instead of just a pointer to it in writev.)