From 91d5b47023b608227d605d1e916b29dd0215bff7 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 20 Mar 2006 13:44:14 -0500 Subject: NFS: add I/O performance counters Invoke the byte and event counter macros where we want to count bytes and events. Clean-up: fix a possible NULL dereference in nfs_lock, and simplify nfs_file_open. 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 Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 8 ++++++++ fs/nfs/direct.c | 7 +++++++ fs/nfs/file.c | 20 +++++++++----------- fs/nfs/inode.c | 8 ++++++++ fs/nfs/read.c | 12 ++++++++++++ fs/nfs/write.c | 18 ++++++++++++++++++ 6 files changed, 62 insertions(+), 11 deletions(-) (limited to 'fs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index a1554bead69..151b8dd0ac3 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -34,6 +34,7 @@ #include "nfs4_fs.h" #include "delegation.h" +#include "iostat.h" #define NFS_PARANOIA 1 /* #define NFS_DEBUG_VERBOSE 1 */ @@ -507,6 +508,8 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) struct nfs_fattr fattr; long res; + nfs_inc_stats(inode, NFSIOS_VFSGETDENTS); + lock_kernel(); res = nfs_revalidate_inode(NFS_SERVER(inode), inode); @@ -713,6 +716,7 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) parent = dget_parent(dentry); lock_kernel(); dir = parent->d_inode; + nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE); inode = dentry->d_inode; if (!inode) { @@ -844,6 +848,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru dfprintk(VFS, "NFS: lookup(%s/%s)\n", dentry->d_parent->d_name.name, dentry->d_name.name); + nfs_inc_stats(dir, NFSIOS_VFSLOOKUP); res = ERR_PTR(-ENAMETOOLONG); if (dentry->d_name.len > NFS_SERVER(dir)->namelen) @@ -1241,6 +1246,7 @@ static int nfs_sillyrename(struct inode *dir, struct dentry *dentry) dfprintk(VFS, "NFS: silly-rename(%s/%s, ct=%d)\n", dentry->d_parent->d_name.name, dentry->d_name.name, atomic_read(&dentry->d_count)); + nfs_inc_stats(dir, NFSIOS_SILLYRENAME); #ifdef NFS_PARANOIA if (!dentry->d_inode) @@ -1640,6 +1646,8 @@ int nfs_permission(struct inode *inode, int mask, struct nameidata *nd) struct rpc_cred *cred; int res = 0; + nfs_inc_stats(inode, NFSIOS_VFSACCESS); + if (mask == 0) goto out; /* Is this sys_access() ? */ diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 4e9b3a1b36c..fc07ce4885d 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -54,6 +54,8 @@ #include #include +#include "iostat.h" + #define NFSDBG_FACILITY NFSDBG_VFS #define MAX_DIRECTIO_SIZE (4096UL << PAGE_SHIFT) @@ -67,6 +69,7 @@ struct nfs_direct_req { struct kref kref; /* release manager */ struct list_head list; /* nfs_read_data structs */ wait_queue_head_t wait; /* wait for i/o completion */ + struct inode * inode; /* target file of I/O */ struct page ** pages; /* pages in our buffer */ unsigned int npages; /* count of pages */ atomic_t complete, /* i/os we're waiting for */ @@ -357,7 +360,9 @@ static ssize_t nfs_direct_read_seg(struct inode *inode, dreq->pages = pages; dreq->npages = nr_pages; + dreq->inode = inode; + nfs_add_stats(inode, NFSIOS_DIRECTREADBYTES, count); rpc_clnt_sigmask(clnt, &oldset); nfs_direct_read_schedule(dreq, inode, ctx, user_addr, count, file_offset); @@ -572,6 +577,7 @@ static ssize_t nfs_direct_write(struct inode *inode, return page_count; } + nfs_add_stats(inode, NFSIOS_DIRECTWRITTENBYTES, size); result = nfs_direct_write_seg(inode, ctx, user_addr, size, file_offset, pages, page_count); nfs_free_user_pages(pages, page_count, 0); @@ -581,6 +587,7 @@ static ssize_t nfs_direct_write(struct inode *inode, break; return result; } + nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, result); tot_bytes += result; file_offset += result; if (result < size) diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 387809f2d18..1cf07e4ad13 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -32,6 +32,7 @@ #include #include "delegation.h" +#include "iostat.h" #define NFSDBG_FACILITY NFSDBG_FILE @@ -102,18 +103,15 @@ static int nfs_check_flags(int flags) static int nfs_file_open(struct inode *inode, struct file *filp) { - struct nfs_server *server = NFS_SERVER(inode); - int (*open)(struct inode *, struct file *); int res; res = nfs_check_flags(filp->f_flags); if (res) return res; + nfs_inc_stats(inode, NFSIOS_VFSOPEN); lock_kernel(); - /* Do NFSv4 open() call */ - if ((open = server->rpc_ops->file_open) != NULL) - res = open(inode, filp); + res = NFS_SERVER(inode)->rpc_ops->file_open(inode, filp); unlock_kernel(); return res; } @@ -124,6 +122,7 @@ nfs_file_release(struct inode *inode, struct file *filp) /* Ensure that dirty pages are flushed out with the right creds */ if (filp->f_mode & FMODE_WRITE) filemap_fdatawrite(filp->f_mapping); + nfs_inc_stats(inode, NFSIOS_VFSRELEASE); return NFS_PROTO(inode)->file_release(inode, filp); } @@ -199,6 +198,7 @@ nfs_file_flush(struct file *file) if ((file->f_mode & FMODE_WRITE) == 0) return 0; + nfs_inc_stats(inode, NFSIOS_VFSFLUSH); lock_kernel(); /* Ensure that data+attribute caches are up to date after close() */ status = nfs_wb_all(inode); @@ -229,6 +229,7 @@ nfs_file_read(struct kiocb *iocb, char __user * buf, size_t count, loff_t pos) (unsigned long) count, (unsigned long) pos); result = nfs_revalidate_file(inode, iocb->ki_filp); + nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, count); if (!result) result = generic_file_aio_read(iocb, buf, count, pos); return result; @@ -282,6 +283,7 @@ nfs_fsync(struct file *file, struct dentry *dentry, int datasync) dfprintk(VFS, "nfs: fsync(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino); + nfs_inc_stats(inode, NFSIOS_VFSFSYNC); lock_kernel(); status = nfs_wb_all(inode); if (!status) { @@ -378,6 +380,7 @@ nfs_file_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t if (!count) goto out; + nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, count); result = generic_file_aio_write(iocb, buf, count, pos); out: return result; @@ -517,9 +520,7 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) inode->i_sb->s_id, inode->i_ino, fl->fl_type, fl->fl_flags, (long long)fl->fl_start, (long long)fl->fl_end); - - if (!inode) - return -EINVAL; + nfs_inc_stats(inode, NFSIOS_VFSLOCK); /* No mandatory locks over NFS */ if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID && @@ -544,9 +545,6 @@ static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) inode->i_sb->s_id, inode->i_ino, fl->fl_type, fl->fl_flags); - if (!inode) - return -EINVAL; - /* * No BSD flocks over NFS allowed. * Note: we could try to fake a POSIX lock request here by diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 86b756f44e2..8ee74111e51 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -753,6 +753,8 @@ static void nfs_zap_caches_locked(struct inode *inode) struct nfs_inode *nfsi = NFS_I(inode); int mode = inode->i_mode; + nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); + NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); NFS_ATTRTIMEO_UPDATE(inode) = jiffies; @@ -940,6 +942,8 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr) struct nfs_fattr fattr; int error; + nfs_inc_stats(inode, NFSIOS_VFSSETATTR); + if (attr->ia_valid & ATTR_SIZE) { if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) attr->ia_valid &= ~ATTR_SIZE; @@ -993,6 +997,7 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) spin_unlock(&inode->i_lock); } if ((attr->ia_valid & ATTR_SIZE) != 0) { + nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); inode->i_size = attr->ia_size; vmtruncate(inode, attr->ia_size); } @@ -1278,6 +1283,7 @@ int nfs_attribute_timeout(struct inode *inode) */ int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) { + nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); if (!(NFS_I(inode)->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA)) && !nfs_attribute_timeout(inode)) return NFS_STALE(inode) ? -ESTALE : 0; @@ -1294,6 +1300,7 @@ void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) struct nfs_inode *nfsi = NFS_I(inode); if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { + nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); if (S_ISREG(inode->i_mode)) nfs_sync_mapping(mapping); invalidate_inode_pages2(mapping); @@ -1615,6 +1622,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) /* Update attrtimeo value if we're out of the unstable period */ if (invalid & NFS_INO_INVALID_ATTR) { + nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); nfsi->attrtimeo_timestamp = jiffies; } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) { diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 05eb43fadf8..ae3ddd24cf8 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -31,6 +31,8 @@ #include +#include "iostat.h" + #define NFSDBG_FACILITY NFSDBG_PAGECACHE static int nfs_pagein_one(struct list_head *, struct inode *); @@ -133,6 +135,8 @@ static int nfs_readpage_sync(struct nfs_open_context *ctx, struct inode *inode, } count -= result; rdata->args.pgbase += result; + nfs_add_stats(inode, NFSIOS_SERVERREADBYTES, result); + /* Note: result == 0 should only happen if we're caching * a write that extends the file and punches a hole. */ @@ -458,8 +462,11 @@ void nfs_readpage_result(struct rpc_task *task, void *calldata) dprintk("NFS: %4d nfs_readpage_result, (status %d)\n", task->tk_pid, status); + nfs_add_stats(data->inode, NFSIOS_SERVERREADBYTES, resp->count); + /* Is this a short read? */ if (task->tk_status >= 0 && resp->count < argp->count && !resp->eof) { + nfs_inc_stats(data->inode, NFSIOS_SHORTREAD); /* Has the server at least made some progress? */ if (resp->count != 0) { /* Yes, so retry the read at the end of the data */ @@ -491,6 +498,9 @@ int nfs_readpage(struct file *file, struct page *page) dprintk("NFS: nfs_readpage (%p %ld@%lu)\n", page, PAGE_CACHE_SIZE, page->index); + nfs_inc_stats(inode, NFSIOS_VFSREADPAGE); + nfs_add_stats(inode, NFSIOS_READPAGES, 1); + /* * Try to flush any pending writes to the file.. * @@ -570,6 +580,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping, inode->i_sb->s_id, (long long)NFS_FILEID(inode), nr_pages); + nfs_inc_stats(inode, NFSIOS_VFSREADPAGES); if (filp == NULL) { desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ); @@ -582,6 +593,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping, if (!list_empty(&head)) { int err = nfs_pagein_list(&head, server->rpages); if (!ret) + nfs_add_stats(inode, NFSIOS_READPAGES, err); ret = err; } put_nfs_open_context(desc.ctx); diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 92ecf24455c..e7c8361cf20 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -63,6 +63,7 @@ #include #include "delegation.h" +#include "iostat.h" #define NFSDBG_FACILITY NFSDBG_PAGECACHE @@ -134,6 +135,7 @@ static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int c end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + ((loff_t)offset+count); if (i_size >= end) return; + nfs_inc_stats(inode, NFSIOS_EXTENDWRITE); i_size_write(inode, end); } @@ -223,6 +225,7 @@ static int nfs_writepage_sync(struct nfs_open_context *ctx, struct inode *inode, wdata->args.pgbase += result; written += result; count -= result; + nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, result); } while (count); /* Update file length */ nfs_grow_file(page, offset, written); @@ -279,6 +282,9 @@ int nfs_writepage(struct page *page, struct writeback_control *wbc) int priority = wb_priority(wbc); int err; + nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGE); + nfs_add_stats(inode, NFSIOS_WRITEPAGES, 1); + /* * Note: We need to ensure that we have a reference to the inode * if we are to do asynchronous writes. If not, waiting @@ -343,6 +349,8 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) struct inode *inode = mapping->host; int err; + nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES); + err = generic_writepages(mapping, wbc); if (err) return err; @@ -354,6 +362,7 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) err = nfs_flush_inode(inode, 0, 0, wb_priority(wbc)); if (err < 0) goto out; + nfs_add_stats(inode, NFSIOS_WRITEPAGES, err); wbc->nr_to_write -= err; if (!wbc->nonblocking && wbc->sync_mode == WB_SYNC_ALL) { err = nfs_wait_on_requests(inode, 0, 0); @@ -596,6 +605,9 @@ static int nfs_wait_on_write_congestion(struct address_space *mapping, int intr) if (!bdi_write_congested(bdi)) return 0; + + nfs_inc_stats(mapping->host, NFSIOS_CONGESTIONWAIT); + if (intr) { struct rpc_clnt *clnt = NFS_CLIENT(mapping->host); sigset_t oldset; @@ -749,6 +761,8 @@ int nfs_updatepage(struct file *file, struct page *page, struct nfs_page *req; int status = 0; + nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE); + dprintk("NFS: nfs_updatepage(%s/%s %d@%Ld)\n", file->f_dentry->d_parent->d_name.name, file->f_dentry->d_name.name, count, @@ -1152,6 +1166,8 @@ void nfs_writeback_done(struct rpc_task *task, void *calldata) dprintk("NFS: %4d nfs_writeback_done (status %d)\n", task->tk_pid, task->tk_status); + nfs_add_stats(data->inode, NFSIOS_SERVERWRITTENBYTES, resp->count); + #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) if (resp->verf->committed < argp->stable && task->tk_status >= 0) { /* We tried a write call, but the server did not @@ -1177,6 +1193,8 @@ void nfs_writeback_done(struct rpc_task *task, void *calldata) if (task->tk_status >= 0 && resp->count < argp->count) { static unsigned long complain; + nfs_inc_stats(data->inode, NFSIOS_SHORTWRITE); + /* Has the server at least made some progress? */ if (resp->count != 0) { /* Was this an NFSv2 write or an NFSv3 stable write? */ -- cgit v1.2.3