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NFSD: Add trace point for SCSI fencing operation.

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Add trace point to print client IP address, net namespace number,
device name and status of SCSI pr_preempt command.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Dai Ngo
2025-11-05 12:45:55 -08:00
committed by Chuck Lever
parent 6f52063db9
commit 99f5aa14f0
2 changed files with 42 additions and 1 deletions
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5
fs/nfsd/blocklayout.c
View File

@@ -13,6 +13,7 @@
#include "pnfs.h"
#include "filecache.h"
#include "vfs.h"
#include "trace.h"
#define NFSDDBG_FACILITY NFSDDBG_PNFS
@@ -398,10 +399,12 @@ nfsd4_scsi_fence_client(struct nfs4_layout_stateid *ls, struct nfsd_file *file)
{
struct nfs4_client *clp = ls->ls_stid.sc_client;
struct block_device *bdev = file->nf_file->f_path.mnt->mnt_sb->s_bdev;
int status;
bdev->bd_disk->fops->pr_ops->pr_preempt(bdev, NFSD_MDS_PR_KEY,
status = bdev->bd_disk->fops->pr_ops->pr_preempt(bdev, NFSD_MDS_PR_KEY,
nfsd4_scsi_pr_key(clp),
PR_EXCLUSIVE_ACCESS_REG_ONLY, true);
trace_nfsd_pnfs_fence(clp, bdev->bd_disk->disk_name, status);
}
const struct nfsd4_layout_ops scsi_layout_ops = {

38
fs/nfsd/trace.h
View File

@@ -2614,6 +2614,44 @@ DEFINE_EVENT(nfsd_vfs_getattr_class, __name, \
DEFINE_NFSD_VFS_GETATTR_EVENT(nfsd_vfs_getattr);
DEFINE_NFSD_VFS_GETATTR_EVENT(nfsd_vfs_statfs);
DECLARE_EVENT_CLASS(nfsd_pnfs_class,
TP_PROTO(
const struct nfs4_client *clp,
const char *dev,
int error
),
TP_ARGS(clp, dev, error),
TP_STRUCT__entry(
__sockaddr(addr, sizeof(struct sockaddr_in6))
__field(unsigned int, netns_ino)
__string(dev, dev)
__field(int, error)
),
TP_fast_assign(
__assign_sockaddr(addr, &clp->cl_addr,
sizeof(struct sockaddr_in6));
__entry->netns_ino = clp->net->ns.inum;
__assign_str(dev);
__entry->error = error;
),
TP_printk("client=%pISpc nn=%d dev=%s error=%d",
__get_sockaddr(addr),
__entry->netns_ino,
__get_str(dev),
__entry->error
)
);
#define DEFINE_NFSD_PNFS_ERR_EVENT(name) \
DEFINE_EVENT(nfsd_pnfs_class, nfsd_pnfs_##name, \
TP_PROTO( \
const struct nfs4_client *clp, \
const char *dev, \
int error \
), \
TP_ARGS(clp, dev, error))
DEFINE_NFSD_PNFS_ERR_EVENT(fence);
#endif /* _NFSD_TRACE_H */
#undef TRACE_INCLUDE_PATH