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nfs: accept CONFIG_NFS_READ_SIZE from config file

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To take advantage of defragmented packets, the config file
can define CONFIG_NFS_READ_SIZE to override the 1kB default.
No support is there for an environment variable by now.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
Alessandro Rubini 2009-08-07 13:59:16 +02:00 committed by Ben Warren
parent 89ba81d107
commit bd931ca61c
1 changed files with 8 additions and 2 deletions
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10
net/nfs.h
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@ -38,8 +38,14 @@
/* Block size used for NFS read accesses. A RPC reply packet (including all
* headers) must fit within a single Ethernet frame to avoid fragmentation.
* Chosen to be a power of two, as most NFS servers are optimized for this. */
#define NFS_READ_SIZE 1024
* However, if CONFIG_IP_DEFRAG is set, the config file may want to use a
* bigger value. In any case, most NFS servers are optimized for a power of 2.
*/
#ifdef CONFIG_NFS_READ_SIZE
#define NFS_READ_SIZE CONFIG_NFS_READ_SIZE
#else
#define NFS_READ_SIZE 1024 /* biggest power of two that fits Ether frame */
#endif
#define NFS_MAXLINKDEPTH 16