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pnfs: add pnfs_put_lseg_async

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This is useful when lsegs need to be released while holding locks.

Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Weston Andros Adamson 2014-07-17 20:42:18 -04:00 committed by Trond Myklebust
parent 02d1426c70
commit e6cf82d183
2 changed files with 24 additions and 0 deletions
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17
fs/nfs/pnfs.c
View File

@ -361,6 +361,23 @@ pnfs_put_lseg(struct pnfs_layout_segment *lseg)
}
EXPORT_SYMBOL_GPL(pnfs_put_lseg);
static void pnfs_put_lseg_async_work(struct work_struct *work)
{
struct pnfs_layout_segment *lseg;
lseg = container_of(work, struct pnfs_layout_segment, pls_work);
pnfs_put_lseg(lseg);
}
void
pnfs_put_lseg_async(struct pnfs_layout_segment *lseg)
{
INIT_WORK(&lseg->pls_work, pnfs_put_lseg_async_work);
schedule_work(&lseg->pls_work);
}
EXPORT_SYMBOL_GPL(pnfs_put_lseg_async);
static u64
end_offset(u64 start, u64 len)
{

7
fs/nfs/pnfs.h
View File

@ -32,6 +32,7 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/workqueue.h>
enum {
NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
@ -46,6 +47,7 @@ struct pnfs_layout_segment {
atomic_t pls_refcount;
unsigned long pls_flags;
struct pnfs_layout_hdr *pls_layout;
struct work_struct pls_work;
};
enum pnfs_try_status {
@ -181,6 +183,7 @@ extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
/* pnfs.c */
void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
void pnfs_put_lseg_async(struct pnfs_layout_segment *lseg);
void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
void unset_pnfs_layoutdriver(struct nfs_server *);
@ -419,6 +422,10 @@ static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
{
}
static inline void pnfs_put_lseg_async(struct pnfs_layout_segment *lseg)
{
}
static inline int pnfs_return_layout(struct inode *ino)
{
return 0;