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Tom Tucker c8237a5fce SVCRDMA: Check num_sge when setting LAST_CTXT bit ... The RDMACTXT_F_LAST_CTXT bit was getting set incorrectly when the last chunk in the read-list spanned multiple pages. This resulted in a kernel panic when the wrong context was used to build the RPC iovec page list. RDMA_READ is used to fetch RPC data from the client for NFS_WRITE requests. A scatter-gather is used to map the advertised client side buffer to the server-side iovec and associated page list. WR contexts are used to convey which scatter-gather entries are handled by each WR. When the write data is large, a single RPC may require multiple RDMA_READ requests so the contexts for a single RPC are chained together in a linked list. The last context in this list is marked with a bit RDMACTXT_F_LAST_CTXT so that when this WR completes, the CQ handler code can enqueue the RPC for processing. The code in rdma_read_xdr was setting this bit on the last two contexts on this list when the last read-list chunk spanned multiple pages. This caused the svc_rdma_recvfrom logic to incorrectly build the RPC and caused the kernel to crash because the second-to-last context doesn't contain the iovec page list. Modified the condition that sets this bit so that it correctly detects the last context for the RPC. Signed-off-by: Tom Tucker <tom@opengridcomputing.com> Tested-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		17 years ago
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auth_gss	[SUNRPC]: net/* NULL noise	17 years ago
xprtrdma	SVCRDMA: Check num_sge when setting LAST_CTXT bit	17 years ago
Makefile	…
auth.c	…
auth_null.c	…
auth_unix.c	…
cache.c	[SUNRPC]: Use proc_create() to setup ->proc_fops first	17 years ago
clnt.c	…
rpc_pipe.c	…
rpcb_clnt.c	…
sched.c	…
socklib.c	…
stats.c	[SUNRPC]: Use proc_create() to setup ->proc_fops first	17 years ago
sunrpc_syms.c	…
svc.c	…
svc_xprt.c	[NET] endianness noise: INADDR_ANY	17 years ago
svcauth.c	…
svcauth_unix.c	…
svcsock.c	Wrap buffers used for rpc debug printks into RPC_IFDEBUG	17 years ago
sysctl.c	…
timer.c	…
xdr.c	…
xprt.c	…
xprtsock.c	…