d9ef5a8c26
Add a per-superblock performance counter facility to the NFS client. This facility mimics the counters available for block devices and for networking. Expose these new counters via the new /proc/self/mountstats interface. Thanks to Andrew Morton and Trond Myklebust for their review and comments. Test plan: fsx and iozone on UP and SMP systems, with and without pre-emption. Watch for memory overwrite bugs, and performance loss (significantly more CPU required per op). Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
#ifndef _NFS_FS_SB
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#define _NFS_FS_SB
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#include <linux/list.h>
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#include <linux/backing-dev.h>
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struct nfs_iostats;
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/*
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* NFS client parameters stored in the superblock.
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*/
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struct nfs_server {
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struct rpc_clnt * client; /* RPC client handle */
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struct rpc_clnt * client_sys; /* 2nd handle for FSINFO */
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struct rpc_clnt * client_acl; /* ACL RPC client handle */
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struct nfs_rpc_ops * rpc_ops; /* NFS protocol vector */
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struct nfs_iostats * io_stats; /* I/O statistics */
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struct backing_dev_info backing_dev_info;
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int flags; /* various flags */
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unsigned int caps; /* server capabilities */
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unsigned int rsize; /* read size */
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unsigned int rpages; /* read size (in pages) */
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unsigned int wsize; /* write size */
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unsigned int wpages; /* write size (in pages) */
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unsigned int wtmult; /* server disk block size */
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unsigned int dtsize; /* readdir size */
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unsigned int bsize; /* server block size */
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unsigned int acregmin; /* attr cache timeouts */
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unsigned int acregmax;
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unsigned int acdirmin;
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unsigned int acdirmax;
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unsigned long retrans_timeo; /* retransmit timeout */
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unsigned int retrans_count; /* number of retransmit tries */
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unsigned int namelen;
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char * hostname; /* remote hostname */
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struct nfs_fh fh;
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struct sockaddr_in addr;
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#ifdef CONFIG_NFS_V4
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/* Our own IP address, as a null-terminated string.
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* This is used to generate the clientid, and the callback address.
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*/
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char ip_addr[16];
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char * mnt_path;
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struct nfs4_client * nfs4_state; /* all NFSv4 state starts here */
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struct list_head nfs4_siblings; /* List of other nfs_server structs
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* that share the same clientid
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*/
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u32 attr_bitmask[2];/* V4 bitmask representing the set
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of attributes supported on this
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filesystem */
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u32 acl_bitmask; /* V4 bitmask representing the ACEs
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that are supported on this
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filesystem */
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#endif
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};
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/* Server capabilities */
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#define NFS_CAP_READDIRPLUS (1U << 0)
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#define NFS_CAP_HARDLINKS (1U << 1)
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#define NFS_CAP_SYMLINKS (1U << 2)
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#define NFS_CAP_ACLS (1U << 3)
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#define NFS_CAP_ATOMIC_OPEN (1U << 4)
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#endif
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