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NFS: Add event tracing for generic NFS events

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Add tracepoints for inode attribute updates, attribute revalidation,
writeback start/end fsync start/end, attribute change start/end,
permission check start/end.

The intention is to enable performance tracing using 'perf'as well as
improving debugging.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-08-19 18:59:33 -04:00
parent 1264a2f053
commit f4ce1299b3
7 changed files with 231 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

29
fs/nfs/inode.c
View file

@ -51,6 +51,8 @@
#include "nfs.h"
#include "netns.h"
#include "nfstrace.h"
#define NFSDBG_FACILITY NFSDBG_VFS
#define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
@ -503,6 +505,8 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
return 0;
trace_nfs_setattr_enter(inode);
/* Write all dirty data */
if (S_ISREG(inode->i_mode)) {
nfs_inode_dio_wait(inode);
@ -522,6 +526,7 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr)
error = nfs_refresh_inode(inode, fattr);
nfs_free_fattr(fattr);
out:
trace_nfs_setattr_exit(inode, error);
return error;
}
EXPORT_SYMBOL_GPL(nfs_setattr);
@ -591,6 +596,7 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
int err;
trace_nfs_getattr_enter(inode);
/* Flush out writes to the server in order to update c/mtime. */
if (S_ISREG(inode->i_mode)) {
nfs_inode_dio_wait(inode);
@ -621,6 +627,7 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
}
out:
trace_nfs_getattr_exit(inode, err);
return err;
}
EXPORT_SYMBOL_GPL(nfs_getattr);
@ -875,6 +882,8 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
trace_nfs_revalidate_inode_enter(inode);
if (is_bad_inode(inode))
goto out;
if (NFS_STALE(inode))
@ -925,6 +934,7 @@ err_out:
nfs4_label_free(label);
out:
nfs_free_fattr(fattr);
trace_nfs_revalidate_inode_exit(inode, status);
return status;
}
@ -975,6 +985,7 @@ static int nfs_invalidate_mapping(struct inode *inode, struct address_space *map
spin_unlock(&inode->i_lock);
nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
nfs_fscache_wait_on_invalidate(inode);
dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
return 0;
@ -1008,8 +1019,12 @@ int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
if (ret < 0)
goto out;
}
if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
trace_nfs_invalidate_mapping_enter(inode);
ret = nfs_invalidate_mapping(inode, mapping);
trace_nfs_invalidate_mapping_exit(inode, ret);
}
out:
return ret;
}
@ -1268,9 +1283,17 @@ static int nfs_inode_attrs_need_update(const struct inode *inode, const struct n
static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
{
int ret;
trace_nfs_refresh_inode_enter(inode);
if (nfs_inode_attrs_need_update(inode, fattr))
return nfs_update_inode(inode, fattr);
return nfs_check_inode_attributes(inode, fattr);
ret = nfs_update_inode(inode, fattr);
else
ret = nfs_check_inode_attributes(inode, fattr);
trace_nfs_refresh_inode_exit(inode, ret);
return ret;
}
/**