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NFSv4: Add support for CB_RECALL_ANY for flexfiles layouts

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When we receive a CB_RECALL_ANY that asks us to return flexfiles
layouts, we iterate through all the layouts and look at whether or
not there are active open file descriptors that might need them
for I/O. If there are no such descriptors, we return the layouts.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust
2020-02-18 15:58:31 -05:00
parent 7f156ef0bf
commit b5fdf8418c
7 changed files with 186 additions and 18 deletions
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3
fs/nfs/pnfs.h
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@@ -329,6 +329,9 @@ 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);
void pnfs_layout_return_unused_byclid(struct nfs_client *clp,
enum pnfs_iomode iomode);
/* nfs4_deviceid_flags */
enum {
NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */