From 0b7baf9433d4e0a0c83eecbadc1f035d5370c6dc Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 24 Aug 2015 18:22:28 -0400 Subject: [PATCH] NFSv4.1/flexfiles: Remove mirror backpointer to lseg. When we start sharing mirrors between several lsegs, we won't be able to keep it. Signed-off-by: Trond Myklebust --- fs/nfs/flexfilelayout/flexfilelayout.c | 25 ++++++++++++------------- fs/nfs/flexfilelayout/flexfilelayout.h | 1 - 2 files changed, 12 insertions(+), 14 deletions(-) diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 62de0b8038c8..f3efff640989 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -290,7 +290,6 @@ ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh, } fls->mirror_array[i]->ds_count = ds_count; - fls->mirror_array[i]->lseg = &fls->generic_hdr; /* deviceid */ rc = decode_deviceid(&stream, &devid); @@ -513,7 +512,8 @@ nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat, } static void -nfs4_ff_layout_stat_io_start_read(struct nfs4_ff_layout_mirror *mirror, +nfs4_ff_layout_stat_io_start_read(struct inode *inode, + struct nfs4_ff_layout_mirror *mirror, __u64 requested, ktime_t now) { bool report; @@ -524,8 +524,7 @@ nfs4_ff_layout_stat_io_start_read(struct nfs4_ff_layout_mirror *mirror, spin_unlock(&mirror->lock); if (report) - pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode, - GFP_KERNEL); + pnfs_report_layoutstat(inode, GFP_KERNEL); } static void @@ -542,7 +541,8 @@ nfs4_ff_layout_stat_io_end_read(struct rpc_task *task, } static void -nfs4_ff_layout_stat_io_start_write(struct nfs4_ff_layout_mirror *mirror, +nfs4_ff_layout_stat_io_start_write(struct inode *inode, + struct nfs4_ff_layout_mirror *mirror, __u64 requested, ktime_t now) { bool report; @@ -553,8 +553,7 @@ nfs4_ff_layout_stat_io_start_write(struct nfs4_ff_layout_mirror *mirror, spin_unlock(&mirror->lock); if (report) - pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode, - GFP_NOIO); + pnfs_report_layoutstat(inode, GFP_NOIO); } static void @@ -1098,7 +1097,7 @@ ff_layout_reset_to_mds(struct pnfs_layout_segment *lseg, int idx) static int ff_layout_read_prepare_common(struct rpc_task *task, struct nfs_pgio_header *hdr) { - nfs4_ff_layout_stat_io_start_read( + nfs4_ff_layout_stat_io_start_read(hdr->inode, FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), hdr->args.count, task->tk_start); @@ -1285,7 +1284,7 @@ static int ff_layout_commit_done_cb(struct rpc_task *task, static int ff_layout_write_prepare_common(struct rpc_task *task, struct nfs_pgio_header *hdr) { - nfs4_ff_layout_stat_io_start_write( + nfs4_ff_layout_stat_io_start_write(hdr->inode, FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), hdr->args.count, task->tk_start); @@ -1367,7 +1366,7 @@ static void ff_layout_write_count_stats(struct rpc_task *task, void *data) static void ff_layout_commit_prepare_common(struct rpc_task *task, struct nfs_commit_data *cdata) { - nfs4_ff_layout_stat_io_start_write( + nfs4_ff_layout_stat_io_start_write(cdata->inode, FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), 0, task->tk_start); } @@ -1912,8 +1911,8 @@ ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args *args, devinfo->layout_type = LAYOUT_FLEX_FILES; devinfo->layoutstats_encode = ff_layout_encode_layoutstats; devinfo->layout_private = mirror; - /* lseg refcount put in cleanup_layoutstats */ - pnfs_get_lseg(pls); + /* mirror refcount put in cleanup_layoutstats */ + atomic_inc(&mirror->ref); ++(*dev_count); } @@ -1965,7 +1964,7 @@ ff_layout_cleanup_layoutstats(struct nfs42_layoutstat_data *data) for (i = 0; i < data->args.num_dev; i++) { mirror = data->args.devinfo[i].layout_private; data->args.devinfo[i].layout_private = NULL; - pnfs_put_lseg(mirror->lseg); + ff_layout_put_mirror(mirror); } } diff --git a/fs/nfs/flexfilelayout/flexfilelayout.h b/fs/nfs/flexfilelayout/flexfilelayout.h index 26b8258e256f..fe9d3ff7cf85 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.h +++ b/fs/nfs/flexfilelayout/flexfilelayout.h @@ -67,7 +67,6 @@ struct nfs4_ff_layoutstat { }; struct nfs4_ff_layout_mirror { - struct pnfs_layout_segment *lseg; /* back pointer */ u32 ds_count; u32 efficiency; struct nfs4_ff_layout_ds *mirror_ds; -- 2.20.1