korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-24 12:44:11 +08:00
Code Issues Packages Projects Releases Wiki Activity

pNFS: Enable per-layout segment commit structures

Browse Source 
Enable adding and lookup of per-layout segment commits in filelayout
and flexfilelayout.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2020-03-20 18:34:33 -04:00
parent a9901899b6
commit ba827c9abb
4 changed files with 117 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
fs/nfs/filelayout/filelayout.c
View File

@ -1168,6 +1168,26 @@ filelayout_get_ds_info(struct inode *inode)
return &FILELAYOUT_FROM_HDR(layout)->commit_info;
}
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,

19
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -2004,6 +2004,24 @@ ff_layout_get_ds_info(struct inode *inode)
return &FF_LAYOUT_FROM_HDR(layout)->commit_info;
}
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,

6
fs/nfs/pnfs.h
View File

@ -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);

77
fs/nfs/pnfs_nfs.c
View File

@ -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);