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nfsd: last_byte_offset

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refactor the nfs4 server lock code to use last_byte_offset
to compute the last byte covered by the lock.  Check for overflow
so that the last byte is set to NFS4_MAX_UINT64 if offset + len
wraps around.

Also, use NFS4_MAX_UINT64 for ~(u64)0 where appropriate.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Benny Halevy 2008-12-15 19:42:03 +02:00 • committed by J. Bruce Fields
parent 4e65ebf089
commit 87df4de807
2 changed files with 28 additions and 16 deletions
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2
include/linux/nfs4.h
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@ -88,6 +88,8 @@
#define NFS4_ACE_GENERIC_EXECUTE 0x001200A0
#define NFS4_ACE_MASK_ALL 0x001F01FF
#define NFS4_MAX_UINT64 (~(u64)0)
enum nfs4_acl_whotype {
NFS4_ACL_WHO_NAMED = 0,
NFS4_ACL_WHO_OWNER,