diff options
| -rw-r--r-- | fs/nfs/inode.c | 1 | ||||
| -rw-r--r-- | fs/nfs/internal.h | 14 | ||||
| -rw-r--r-- | fs/nfs/nfs4filelayout.c | 235 | ||||
| -rw-r--r-- | fs/nfs/pnfs.c | 1 | ||||
| -rw-r--r-- | fs/nfs/write.c | 21 | ||||
| -rw-r--r-- | include/linux/nfs_fs.h | 1 | ||||
| -rw-r--r-- | include/linux/nfs_xdr.h | 1 |
7 files changed, 267 insertions, 7 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 477a2e5..229e586 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1470,6 +1470,7 @@ static inline void nfs4_init_once(struct nfs_inode *nfsi) nfsi->delegation_state = 0; init_rwsem(&nfsi->rwsem); nfsi->layout = NULL; + atomic_set(&nfsi->commits_outstanding, 0); #endif } diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index d1ddc23..7087050 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -276,11 +276,25 @@ extern int nfs_initiate_read(struct nfs_read_data *data, struct rpc_clnt *clnt, extern void nfs_read_prepare(struct rpc_task *task, void *calldata); /* write.c */ +extern void nfs_commit_free(struct nfs_write_data *p); extern int nfs_initiate_write(struct nfs_write_data *data, struct rpc_clnt *clnt, const struct rpc_call_ops *call_ops, int how); extern void nfs_write_prepare(struct rpc_task *task, void *calldata); +extern int nfs_initiate_commit(struct nfs_write_data *data, + struct rpc_clnt *clnt, + const struct rpc_call_ops *call_ops, + int how); +extern void nfs_init_commit(struct nfs_write_data *data, + struct list_head *head, + struct pnfs_layout_segment *lseg); +void nfs_retry_commit(struct list_head *page_list, + struct pnfs_layout_segment *lseg); +void nfs_commit_clear_lock(struct nfs_inode *nfsi); +void nfs_commitdata_release(void *data); +void nfs_commit_release_pages(struct nfs_write_data *data); + #ifdef CONFIG_MIGRATION extern int nfs_migrate_page(struct address_space *, struct page *, struct page *); diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c index 03ff80c..97e75a2 100644 --- a/fs/nfs/nfs4filelayout.c +++ b/fs/nfs/nfs4filelayout.c @@ -213,6 +213,37 @@ static int filelayout_write_done_cb(struct rpc_task *task, return 0; } +/* Fake up some data that will cause nfs_commit_release to retry the writes. */ +static void prepare_to_resend_writes(struct nfs_write_data *data) +{ + struct nfs_page *first = nfs_list_entry(data->pages.next); + + data->task.tk_status = 0; + memcpy(data->verf.verifier, first->wb_verf.verifier, + sizeof(first->wb_verf.verifier)); + data->verf.verifier[0]++; /* ensure verifier mismatch */ +} + +static int filelayout_commit_done_cb(struct rpc_task *task, + struct nfs_write_data *data) +{ + int reset = 0; + + if (filelayout_async_handle_error(task, data->args.context->state, + data->ds_clp, &reset) == -EAGAIN) { + dprintk("%s calling restart ds_clp %p ds_clp->cl_session %p\n", + __func__, data->ds_clp, data->ds_clp->cl_session); + if (reset) { + prepare_to_resend_writes(data); + filelayout_set_lo_fail(data->lseg); + } else + nfs_restart_rpc(task, data->ds_clp); + return -EAGAIN; + } + + return 0; +} + static void filelayout_write_prepare(struct rpc_task *task, void *data) { struct nfs_write_data *wdata = (struct nfs_write_data *)data; @@ -240,6 +271,16 @@ static void filelayout_write_release(void *data) wdata->mds_ops->rpc_release(data); } +static void filelayout_commit_release(void *data) +{ + struct nfs_write_data *wdata = (struct nfs_write_data *)data; + + nfs_commit_release_pages(wdata); + if (atomic_dec_and_test(&NFS_I(wdata->inode)->commits_outstanding)) + nfs_commit_clear_lock(NFS_I(wdata->inode)); + nfs_commitdata_release(wdata); +} + struct rpc_call_ops filelayout_read_call_ops = { .rpc_call_prepare = filelayout_read_prepare, .rpc_call_done = filelayout_read_call_done, @@ -252,6 +293,12 @@ struct rpc_call_ops filelayout_write_call_ops = { .rpc_release = filelayout_write_release, }; +struct rpc_call_ops filelayout_commit_call_ops = { + .rpc_call_prepare = filelayout_write_prepare, + .rpc_call_done = filelayout_write_call_done, + .rpc_release = filelayout_commit_release, +}; + static enum pnfs_try_status filelayout_read_pagelist(struct nfs_read_data *data) { @@ -574,6 +621,191 @@ filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, return (p_stripe == r_stripe); } +static bool filelayout_mark_pnfs_commit(struct pnfs_layout_segment *lseg) +{ + return !FILELAYOUT_LSEG(lseg)->commit_through_mds; +} + +static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j) +{ + if (fl->stripe_type == STRIPE_SPARSE) + return nfs4_fl_calc_ds_index(&fl->generic_hdr, j); + else + return j; +} + +struct list_head *filelayout_choose_commit_list(struct nfs_page *req) +{ + struct pnfs_layout_segment *lseg = req->wb_commit_lseg; + struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); + u32 i, j; + struct list_head *list; + + /* Note that we are calling nfs4_fl_calc_j_index on each page + * that ends up being committed to a data server. An attractive + * alternative is to add a field to nfs_write_data and nfs_page + * to store the value calculated in filelayout_write_pagelist + * and just use that here. + */ + j = nfs4_fl_calc_j_index(lseg, + (loff_t)req->wb_index << PAGE_CACHE_SHIFT); + i = select_bucket_index(fl, j); + list = &fl->commit_buckets[i]; + if (list_empty(list)) { + /* Non-empty buckets hold a reference on the lseg */ + get_lseg(lseg); + } + return list; +} + +static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) +{ + struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); + + if (flseg->stripe_type == STRIPE_SPARSE) + return i; + else + return nfs4_fl_calc_ds_index(lseg, i); +} + +static struct nfs_fh * +select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) +{ + struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); + + if (flseg->stripe_type == STRIPE_SPARSE) { + if (flseg->num_fh == 1) + i = 0; + else if (flseg->num_fh == 0) + /* Use the MDS OPEN fh set in nfs_read_rpcsetup */ + return NULL; + } + return flseg->fh_array[i]; +} + +static int filelayout_initiate_commit(struct nfs_write_data *data, int how) +{ + struct pnfs_layout_segment *lseg = data->lseg; + struct nfs4_pnfs_ds *ds; + u32 idx; + struct nfs_fh *fh; + + idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); + ds = nfs4_fl_prepare_ds(lseg, idx); + if (!ds) { + printk(KERN_ERR "%s: prepare_ds failed, use MDS\n", __func__); + set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags); + set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags); + prepare_to_resend_writes(data); + data->mds_ops->rpc_release(data); + return -EAGAIN; + } + dprintk("%s ino %lu, how %d\n", __func__, data->inode->i_ino, how); + data->write_done_cb = filelayout_commit_done_cb; + data->ds_clp = ds->ds_clp; + fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); + if (fh) + data->args.fh = fh; + return nfs_initiate_commit(data, ds->ds_clp->cl_rpcclient, + &filelayout_commit_call_ops, how); +} + +/* + * This is only useful while we are using whole file layouts. + */ +static struct pnfs_layout_segment *find_only_write_lseg(struct inode *inode) +{ + struct pnfs_layout_segment *lseg, *rv = NULL; + + spin_lock(&inode->i_lock); + list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) + if (lseg->pls_range.iomode == IOMODE_RW) + rv = get_lseg(lseg); + spin_unlock(&inode->i_lock); + return rv; +} + +static int alloc_ds_commits(struct inode *inode, struct list_head *list) +{ + struct pnfs_layout_segment *lseg; + struct nfs4_filelayout_segment *fl; + struct nfs_write_data *data; + int i, j; + + /* Won't need this when non-whole file layout segments are supported + * instead we will use a pnfs_layout_hdr structure */ + lseg = find_only_write_lseg(inode); + if (!lseg) + return 0; + fl = FILELAYOUT_LSEG(lseg); + for (i = 0; i < fl->number_of_buckets; i++) { + if (list_empty(&fl->commit_buckets[i])) + continue; + data = nfs_commitdata_alloc(); + if (!data) + goto out_bad; + data->ds_commit_index = i; + data->lseg = lseg; + list_add(&data->pages, list); + } + put_lseg(lseg); + return 0; + +out_bad: + for (j = i; j < fl->number_of_buckets; j++) { + if (list_empty(&fl->commit_buckets[i])) + continue; + nfs_retry_commit(&fl->commit_buckets[i], lseg); + put_lseg(lseg); /* associated with emptying bucket */ + } + put_lseg(lseg); + /* Caller will clean up entries put on list */ + return -ENOMEM; +} + +/* This follows nfs_commit_list pretty closely */ +static int +filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, + int how) +{ + struct nfs_write_data *data, *tmp; + LIST_HEAD(list); + + if (!list_empty(mds_pages)) { + data = nfs_commitdata_alloc(); + if (!data) + goto out_bad; + data->lseg = NULL; + list_add(&data->pages, &list); + } + + if (alloc_ds_commits(inode, &list)) + goto out_bad; + + list_for_each_entry_safe(data, tmp, &list, pages) { + list_del_init(&data->pages); + atomic_inc(&NFS_I(inode)->commits_outstanding); + if (!data->lseg) { + nfs_init_commit(data, mds_pages, NULL); + nfs_initiate_commit(data, NFS_CLIENT(inode), + data->mds_ops, how); + } else { + nfs_init_commit(data, &FILELAYOUT_LSEG(data->lseg)->commit_buckets[data->ds_commit_index], data->lseg); + filelayout_initiate_commit(data, how); + } + } + return 0; + out_bad: + list_for_each_entry_safe(data, tmp, &list, pages) { + nfs_retry_commit(&data->pages, data->lseg); + list_del_init(&data->pages); + nfs_commit_free(data); + } + nfs_retry_commit(mds_pages, NULL); + nfs_commit_clear_lock(NFS_I(inode)); + return -ENOMEM; +} + static struct pnfs_layoutdriver_type filelayout_type = { .id = LAYOUT_NFSV4_1_FILES, .name = "LAYOUT_NFSV4_1_FILES", @@ -581,6 +813,9 @@ static struct pnfs_layoutdriver_type filelayout_type = { .alloc_lseg = filelayout_alloc_lseg, .free_lseg = filelayout_free_lseg, .pg_test = filelayout_pg_test, + .mark_pnfs_commit = filelayout_mark_pnfs_commit, + .choose_commit_list = filelayout_choose_commit_list, + .commit_pagelist = filelayout_commit_pagelist, .read_pagelist = filelayout_read_pagelist, .write_pagelist = filelayout_write_pagelist, }; diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index f38813a..c675659 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -259,6 +259,7 @@ put_lseg(struct pnfs_layout_segment *lseg) pnfs_free_lseg_list(&free_me); } } +EXPORT_SYMBOL_GPL(put_lseg); static bool should_free_lseg(u32 lseg_iomode, u32 recall_iomode) diff --git a/fs/nfs/write.c b/fs/nfs/write.c index cae5d16..e7aeda0 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -59,6 +59,7 @@ struct nfs_write_data *nfs_commitdata_alloc(void) } return p; } +EXPORT_SYMBOL_GPL(nfs_commitdata_alloc); void nfs_commit_free(struct nfs_write_data *p) { @@ -66,6 +67,7 @@ void nfs_commit_free(struct nfs_write_data *p) kfree(p->pagevec); mempool_free(p, nfs_commit_mempool); } +EXPORT_SYMBOL_GPL(nfs_commit_free); struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount) { @@ -1283,15 +1285,15 @@ static int nfs_commit_set_lock(struct nfs_inode *nfsi, int may_wait) return (ret < 0) ? ret : 1; } -static void nfs_commit_clear_lock(struct nfs_inode *nfsi) +void nfs_commit_clear_lock(struct nfs_inode *nfsi) { clear_bit(NFS_INO_COMMIT, &nfsi->flags); smp_mb__after_clear_bit(); wake_up_bit(&nfsi->flags, NFS_INO_COMMIT); } +EXPORT_SYMBOL_GPL(nfs_commit_clear_lock); - -static void nfs_commitdata_release(void *data) +void nfs_commitdata_release(void *data) { struct nfs_write_data *wdata = data; @@ -1299,8 +1301,9 @@ static void nfs_commitdata_release(void *data) put_nfs_open_context(wdata->args.context); nfs_commit_free(wdata); } +EXPORT_SYMBOL_GPL(nfs_commitdata_release); -static int nfs_initiate_commit(struct nfs_write_data *data, struct rpc_clnt *clnt, +int nfs_initiate_commit(struct nfs_write_data *data, struct rpc_clnt *clnt, const struct rpc_call_ops *call_ops, int how) { @@ -1334,11 +1337,12 @@ static int nfs_initiate_commit(struct nfs_write_data *data, struct rpc_clnt *cln rpc_put_task(task); return 0; } +EXPORT_SYMBOL_GPL(nfs_initiate_commit); /* * Set up the argument/result storage required for the RPC call. */ -static void nfs_init_commit(struct nfs_write_data *data, +void nfs_init_commit(struct nfs_write_data *data, struct list_head *head, struct pnfs_layout_segment *lseg) { @@ -1365,8 +1369,9 @@ static void nfs_init_commit(struct nfs_write_data *data, data->res.verf = &data->verf; nfs_fattr_init(&data->fattr); } +EXPORT_SYMBOL_GPL(nfs_init_commit); -static void nfs_retry_commit(struct list_head *page_list, +void nfs_retry_commit(struct list_head *page_list, struct pnfs_layout_segment *lseg) { struct nfs_page *req; @@ -1381,6 +1386,7 @@ static void nfs_retry_commit(struct list_head *page_list, nfs_clear_page_tag_locked(req); } } +EXPORT_SYMBOL_GPL(nfs_retry_commit); /* * Commit dirty pages @@ -1419,7 +1425,7 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata) return; } -static void nfs_commit_release_pages(struct nfs_write_data *data) +void nfs_commit_release_pages(struct nfs_write_data *data) { struct nfs_page *req; int status = data->task.tk_status; @@ -1456,6 +1462,7 @@ static void nfs_commit_release_pages(struct nfs_write_data *data) nfs_clear_page_tag_locked(req); } } +EXPORT_SYMBOL_GPL(nfs_commit_release_pages); static void nfs_commit_release(void *calldata) { diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index eddda6c..807e07c 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -198,6 +198,7 @@ struct nfs_inode { /* pNFS layout information */ struct pnfs_layout_hdr *layout; + atomic_t commits_outstanding; #endif /* CONFIG_NFS_V4*/ #ifdef CONFIG_NFS_FSCACHE struct fscache_cookie *fscache; diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 2c2c67d..ac0c0e5 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1040,6 +1040,7 @@ struct nfs_write_data { struct nfs_writeres res; /* result struct */ struct pnfs_layout_segment *lseg; struct nfs_client *ds_clp; /* pNFS data server */ + int ds_commit_index; const struct rpc_call_ops *mds_ops; int (*write_done_cb) (struct rpc_task *task, struct nfs_write_data *data); #ifdef CONFIG_NFS_V4 |
