diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfs/pnfs.c | 15 | ||||
| -rw-r--r-- | fs/nfs/pnfs.h | 2 |
2 files changed, 16 insertions, 1 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index b822b1749643..685af4fb39ca 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1880,15 +1880,28 @@ pnfs_try_to_read_data(struct nfs_pgio_header *hdr, return trypnfs; } +/* Resend all requests through pnfs. */ +int pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) +{ + struct nfs_pageio_descriptor pgio; + + nfs_pageio_init_read(&pgio, hdr->inode, false, hdr->completion_ops); + return nfs_pageio_resend(&pgio, hdr); +} +EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); + static void pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) { const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; struct pnfs_layout_segment *lseg = desc->pg_lseg; enum pnfs_try_status trypnfs; + int err = 0; trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); - if (trypnfs == PNFS_NOT_ATTEMPTED) + if (trypnfs == PNFS_TRY_AGAIN) + err = pnfs_read_resend_pnfs(hdr); + if (trypnfs == PNFS_NOT_ATTEMPTED || err) pnfs_read_through_mds(desc, hdr); } diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index a0ab81cc9cf3..84c25cd476f8 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -72,6 +72,7 @@ struct pnfs_layout_segment { enum pnfs_try_status { PNFS_ATTEMPTED = 0, PNFS_NOT_ATTEMPTED = 1, + PNFS_TRY_AGAIN = 2, }; #ifdef CONFIG_NFS_V4_1 @@ -268,6 +269,7 @@ int _pnfs_return_layout(struct inode *); int pnfs_commit_and_return_layout(struct inode *); void pnfs_ld_write_done(struct nfs_pgio_header *); void pnfs_ld_read_done(struct nfs_pgio_header *); +int pnfs_read_resend_pnfs(struct nfs_pgio_header *); struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, loff_t pos, |