From 8733408d6ed713d080c325262d7b51a780136d41 Mon Sep 17 00:00:00 2001 From: Peng Tao Date: Tue, 23 Jun 2015 19:51:57 +0800 Subject: [PATCH] pnfs: add pnfs_report_layoutstat helper function Reviewed-by: Jeff Layton Signed-off-by: Peng Tao Signed-off-by: Trond Myklebust --- fs/nfs/nfs42proc.c | 4 ++++ fs/nfs/pnfs.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++ fs/nfs/pnfs.h | 3 +++ 3 files changed, 56 insertions(+) diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index a0530418255f..ee0248340a42 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -198,6 +198,10 @@ static void nfs42_layoutstat_release(void *calldata) { struct nfs42_layoutstat_data *data = calldata; + struct nfs_server *nfss = NFS_SERVER(data->args.inode); + + if (nfss->pnfs_curr_ld->cleanup_layoutstats) + nfss->pnfs_curr_ld->cleanup_layoutstats(data); pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); nfs_iput_and_deactive(data->inode); diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index d47c188682b1..6279cff7df74 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -35,6 +35,7 @@ #include "iostat.h" #include "nfs4trace.h" #include "delegation.h" +#include "nfs42.h" #define NFSDBG_FACILITY NFSDBG_PNFS #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) @@ -2250,3 +2251,51 @@ struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) } return thp; } + +int +pnfs_report_layoutstat(struct inode *inode) +{ + struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; + struct nfs_server *server = NFS_SERVER(inode); + struct nfs42_layoutstat_data *data; + struct pnfs_layout_hdr *hdr; + int status = 0; + + if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats) + goto out; + + spin_lock(&inode->i_lock); + if (!NFS_I(inode)->layout) { + spin_unlock(&inode->i_lock); + goto out; + } + hdr = NFS_I(inode)->layout; + pnfs_get_layout_hdr(hdr); + spin_unlock(&inode->i_lock); + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) { + status = -ENOMEM; + goto out_put; + } + + data->args.fh = NFS_FH(inode); + data->args.inode = inode; + nfs4_stateid_copy(&data->args.stateid, &hdr->plh_stateid); + status = ld->prepare_layoutstats(&data->args); + if (status) + goto out_free; + + status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data); + +out: + dprintk("%s returns %d\n", __func__, status); + return status; + +out_free: + kfree(data); +out_put: + pnfs_put_layout_hdr(hdr); + goto out; +} +EXPORT_SYMBOL_GPL(pnfs_report_layoutstat); diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 1e6308f82fc3..0a4723945db2 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -178,6 +178,8 @@ struct pnfs_layoutdriver_type { void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo, struct xdr_stream *xdr, const struct nfs4_layoutcommit_args *args); + int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); + void (*cleanup_layoutstats) (struct nfs42_layoutstat_data *data); }; struct pnfs_layout_hdr { @@ -290,6 +292,7 @@ int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); void pnfs_error_mark_layout_for_return(struct inode *inode, struct pnfs_layout_segment *lseg); +int pnfs_report_layoutstat(struct inode *inode); /* nfs4_deviceid_flags */ enum { -- 2.30.2