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| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2010-02-07 20:20:28 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-12 11:47:00 -0800 |
| commit | 69a6a0b38a139ccceef32222108caca8a9b0b795 (patch) | |
| tree | 04e24f2b012c14f33f5bc3d6f96f84056cf1fbbe /Documentation/futex-requeue-pi.txt | |
| parent | 7455a76f170f794498d26081a5f15b797ef1a2aa (diff) | |
| download | talos-op-linux-69a6a0b38a139ccceef32222108caca8a9b0b795.tar.gz talos-op-linux-69a6a0b38a139ccceef32222108caca8a9b0b795.zip | |
dccp: allow probing of CCID-array length
This fixes a problem in the DCCP getsockopt() API: currently there is no way
for a user to a priori know the number of built-in CCIDs, other than trying
DCCP_SOCKOPT_AVAILABLE_CCIDS in a loop, incrementing the option length until
EINVAL is no longer returned.
This patch truncates the array to the user-provided length. No copy is made
when the length is <= 0.
Due to the length restriction in do_dccp_getsockopt() to sizeof(int), the
minimum array length remains 4, which is a reasonable default (only 3
CCIDs, CCID-2..4, are currently defined).
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/futex-requeue-pi.txt')
0 files changed, 0 insertions, 0 deletions
