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author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-03-20 23:34:33 +0100 |
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committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-03-27 21:34:34 +0100 |
commit | ba827c9abb0b413a4c87b68c87d39b310fc01101 (patch) | |
tree | 4fe2907dadb285f53ca76f7841d66ce9634173c6 /fs/nfs | |
parent | pNFS: Add infrastructure for cleaning up per-layout commit structures (diff) | |
download | linux-ba827c9abb0b413a4c87b68c87d39b310fc01101.tar.xz linux-ba827c9abb0b413a4c87b68c87d39b310fc01101.zip |
pNFS: Enable per-layout segment commit structures
Enable adding and lookup of per-layout segment commits in filelayout
and flexfilelayout.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r-- | fs/nfs/filelayout/filelayout.c | 21 | ||||
-rw-r--r-- | fs/nfs/flexfilelayout/flexfilelayout.c | 19 | ||||
-rw-r--r-- | fs/nfs/pnfs.h | 6 | ||||
-rw-r--r-- | fs/nfs/pnfs_nfs.c | 77 |
4 files changed, 117 insertions, 6 deletions
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c index ffc5e2af1776..e3cf42c91d80 100644 --- a/fs/nfs/filelayout/filelayout.c +++ b/fs/nfs/filelayout/filelayout.c @@ -1169,6 +1169,26 @@ filelayout_get_ds_info(struct inode *inode) } static void +filelayout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo, + struct pnfs_layout_segment *lseg) +{ + struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); + struct inode *inode = lseg->pls_layout->plh_inode; + struct pnfs_commit_array *array, *new; + unsigned int size = (fl->stripe_type == STRIPE_SPARSE) ? + fl->dsaddr->ds_num : fl->dsaddr->stripe_count; + + new = pnfs_alloc_commit_array(size, GFP_NOIO); + if (new) { + spin_lock(&inode->i_lock); + array = pnfs_add_commit_array(fl_cinfo, new, lseg); + spin_unlock(&inode->i_lock); + if (array != new) + pnfs_free_commit_array(new); + } +} + +static void filelayout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) { @@ -1191,6 +1211,7 @@ static struct pnfs_layoutdriver_type filelayout_type = { .pg_read_ops = &filelayout_pg_read_ops, .pg_write_ops = &filelayout_pg_write_ops, .get_ds_info = &filelayout_get_ds_info, + .setup_ds_info = filelayout_setup_ds_info, .release_ds_info = filelayout_release_ds_info, .mark_request_commit = filelayout_mark_request_commit, .clear_request_commit = pnfs_generic_clear_request_commit, diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 8e1393d75cbc..f343a241906a 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -2005,6 +2005,24 @@ ff_layout_get_ds_info(struct inode *inode) } static void +ff_layout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo, + struct pnfs_layout_segment *lseg) +{ + struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); + struct inode *inode = lseg->pls_layout->plh_inode; + struct pnfs_commit_array *array, *new; + + new = pnfs_alloc_commit_array(flseg->mirror_array_cnt, GFP_NOIO); + if (new) { + spin_lock(&inode->i_lock); + array = pnfs_add_commit_array(fl_cinfo, new, lseg); + spin_unlock(&inode->i_lock); + if (array != new) + pnfs_free_commit_array(new); + } +} + +static void ff_layout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) { @@ -2513,6 +2531,7 @@ static struct pnfs_layoutdriver_type flexfilelayout_type = { .pg_read_ops = &ff_layout_pg_read_ops, .pg_write_ops = &ff_layout_pg_write_ops, .get_ds_info = ff_layout_get_ds_info, + .setup_ds_info = ff_layout_setup_ds_info, .release_ds_info = ff_layout_release_ds_info, .free_deviceid_node = ff_layout_free_deviceid_node, .mark_request_commit = pnfs_layout_mark_request_commit, diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 6c48bd7b4640..9647045a60c2 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -150,6 +150,8 @@ struct pnfs_layoutdriver_type { const struct nfs_pageio_ops *pg_write_ops; struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); + void (*setup_ds_info)(struct pnfs_ds_commit_info *, + struct pnfs_layout_segment *); void (*release_ds_info)(struct pnfs_ds_commit_info *, struct inode *inode); void (*mark_request_commit) (struct nfs_page *req, @@ -371,6 +373,10 @@ void nfs4_deviceid_purge_client(const struct nfs_client *); /* pnfs_nfs.c */ struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); void pnfs_free_commit_array(struct pnfs_commit_array *p); +struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, + struct pnfs_commit_array *, + struct pnfs_layout_segment *); + void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, struct pnfs_layout_segment *lseg); void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c index edad251a6a48..5b426a090ee3 100644 --- a/fs/nfs/pnfs_nfs.c +++ b/fs/nfs/pnfs_nfs.c @@ -118,6 +118,66 @@ pnfs_free_commit_array(struct pnfs_commit_array *p) } EXPORT_SYMBOL_GPL(pnfs_free_commit_array); +static struct pnfs_commit_array * +pnfs_find_commit_array_by_lseg(struct pnfs_ds_commit_info *fl_cinfo, + struct pnfs_layout_segment *lseg) +{ + struct pnfs_commit_array *array; + + list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) { + if (array->lseg == lseg) + return array; + } + return NULL; +} + +struct pnfs_commit_array * +pnfs_add_commit_array(struct pnfs_ds_commit_info *fl_cinfo, + struct pnfs_commit_array *new, + struct pnfs_layout_segment *lseg) +{ + struct pnfs_commit_array *array; + + array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg); + if (array) + return array; + new->lseg = lseg; + refcount_set(&new->refcount, 1); + list_add_rcu(&new->cinfo_list, &fl_cinfo->commits); + list_add(&new->lseg_list, &lseg->pls_commits); + return new; +} +EXPORT_SYMBOL_GPL(pnfs_add_commit_array); + +static void +pnfs_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo, + struct pnfs_layout_segment *lseg) +{ + struct inode *inode = lseg->pls_layout->plh_inode; + struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; + + if (ld->setup_ds_info != NULL) + ld->setup_ds_info(fl_cinfo, lseg); +} + +static struct pnfs_commit_array * +pnfs_lookup_commit_array(struct pnfs_ds_commit_info *fl_cinfo, + struct pnfs_layout_segment *lseg) +{ + struct pnfs_commit_array *array; + + rcu_read_lock(); + array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg); + if (!array) { + rcu_read_unlock(); + pnfs_setup_ds_info(fl_cinfo, lseg); + rcu_read_lock(); + array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg); + } + rcu_read_unlock(); + return array; +} + static void pnfs_release_commit_array_locked(struct pnfs_commit_array *array) { @@ -1082,17 +1142,18 @@ pnfs_layout_mark_request_commit(struct nfs_page *req, u32 ds_commit_idx) { struct list_head *list; + struct pnfs_commit_array *array; struct pnfs_commit_bucket *buckets; mutex_lock(&NFS_I(cinfo->inode)->commit_mutex); - buckets = cinfo->ds->buckets; + array = pnfs_lookup_commit_array(cinfo->ds, lseg); + if (!array) + goto out_resched; + buckets = array->buckets; list = &buckets[ds_commit_idx].written; if (list_empty(list)) { - if (!pnfs_is_valid_lseg(lseg)) { - mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); - cinfo->completion_ops->resched_write(cinfo, req); - return; - } + if (!pnfs_is_valid_lseg(lseg)) + goto out_resched; /* Non-empty buckets hold a reference on the lseg. That ref * is normally transferred to the COMMIT call and released * there. It could also be released if the last req is pulled @@ -1108,6 +1169,10 @@ pnfs_layout_mark_request_commit(struct nfs_page *req, nfs_request_add_commit_list_locked(req, list, cinfo); mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); nfs_mark_page_unstable(req->wb_page, cinfo); + return; +out_resched: + mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); + cinfo->completion_ops->resched_write(cinfo, req); } EXPORT_SYMBOL_GPL(pnfs_layout_mark_request_commit); |