forked from Minki/linux
netfs: Finish off rename of netfs_read_request to netfs_io_request
Adjust helper function names and comments after mass rename of struct netfs_read_*request to struct netfs_io_*request. Changes ======= ver #2) - Make the changes in the docs also. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/164622992433.3564931.6684311087845150271.stgit@warthog.procyon.org.uk/ # v1 Link: https://lore.kernel.org/r/164678196111.1200972.5001114956865989528.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/164692892567.2099075.13895804222087028813.stgit@warthog.procyon.org.uk/ # v3
This commit is contained in:
David Howells
parent
6a19114b8e
commit
f18a378580
@ -250,7 +250,7 @@ through which it can issue requests and negotiate::
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int (*begin_cache_operation)(struct netfs_io_request *rreq);
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void (*expand_readahead)(struct netfs_io_request *rreq);
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bool (*clamp_length)(struct netfs_io_subrequest *subreq);
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void (*issue_op)(struct netfs_io_subrequest *subreq);
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void (*issue_read)(struct netfs_io_subrequest *subreq);
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bool (*is_still_valid)(struct netfs_io_request *rreq);
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int (*check_write_begin)(struct file *file, loff_t pos, unsigned len,
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struct folio *folio, void **_fsdata);
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@ -305,7 +305,7 @@ The operations are as follows:
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This should return 0 on success and an error code on error.
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* ``issue_op()``
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* ``issue_read()``
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[Required] The helpers use this to dispatch a subrequest to the server for
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reading. In the subrequest, ->start, ->len and ->transferred indicate what
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@ -28,10 +28,10 @@
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#include "fid.h"
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/**
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* v9fs_req_issue_op - Issue a read from 9P
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* v9fs_issue_read - Issue a read from 9P
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* @subreq: The read to make
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*/
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static void v9fs_req_issue_op(struct netfs_io_subrequest *subreq)
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static void v9fs_issue_read(struct netfs_io_subrequest *subreq)
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{
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struct netfs_io_request *rreq = subreq->rreq;
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struct p9_fid *fid = rreq->netfs_priv;
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@ -106,7 +106,7 @@ static const struct netfs_request_ops v9fs_req_ops = {
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.init_request = v9fs_init_request,
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.is_cache_enabled = v9fs_is_cache_enabled,
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.begin_cache_operation = v9fs_begin_cache_operation,
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.issue_op = v9fs_req_issue_op,
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.issue_read = v9fs_issue_read,
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.cleanup = v9fs_req_cleanup,
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};
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@ -310,7 +310,7 @@ int afs_fetch_data(struct afs_vnode *vnode, struct afs_read *req)
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return afs_do_sync_operation(op);
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}
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static void afs_req_issue_op(struct netfs_io_subrequest *subreq)
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static void afs_issue_read(struct netfs_io_subrequest *subreq)
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{
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struct afs_vnode *vnode = AFS_FS_I(subreq->rreq->inode);
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struct afs_read *fsreq;
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@ -401,7 +401,7 @@ const struct netfs_request_ops afs_req_ops = {
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.is_cache_enabled = afs_is_cache_enabled,
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.begin_cache_operation = afs_begin_cache_operation,
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.check_write_begin = afs_check_write_begin,
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.issue_op = afs_req_issue_op,
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.issue_read = afs_issue_read,
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.cleanup = afs_priv_cleanup,
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};
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@ -406,7 +406,7 @@ static enum netfs_io_source cachefiles_prepare_read(struct netfs_io_subrequest *
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}
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if (test_bit(FSCACHE_COOKIE_NO_DATA_TO_READ, &cookie->flags)) {
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__set_bit(NETFS_SREQ_WRITE_TO_CACHE, &subreq->flags);
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__set_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags);
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why = cachefiles_trace_read_no_data;
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goto out_no_object;
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}
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@ -475,7 +475,7 @@ static enum netfs_io_source cachefiles_prepare_read(struct netfs_io_subrequest *
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goto out;
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download_and_store:
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__set_bit(NETFS_SREQ_WRITE_TO_CACHE, &subreq->flags);
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__set_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags);
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out:
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cachefiles_end_secure(cache, saved_cred);
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out_no_object:
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@ -259,7 +259,7 @@ static bool ceph_netfs_issue_op_inline(struct netfs_io_subrequest *subreq)
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size_t len;
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__set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags);
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__clear_bit(NETFS_SREQ_WRITE_TO_CACHE, &subreq->flags);
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__clear_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags);
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if (subreq->start >= inode->i_size)
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goto out;
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@ -298,7 +298,7 @@ out:
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return true;
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}
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static void ceph_netfs_issue_op(struct netfs_io_subrequest *subreq)
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static void ceph_netfs_issue_read(struct netfs_io_subrequest *subreq)
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{
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struct netfs_io_request *rreq = subreq->rreq;
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struct inode *inode = rreq->inode;
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@ -367,7 +367,7 @@ static void ceph_readahead_cleanup(struct address_space *mapping, void *priv)
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static const struct netfs_request_ops ceph_netfs_read_ops = {
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.is_cache_enabled = ceph_is_cache_enabled,
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.begin_cache_operation = ceph_begin_cache_operation,
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.issue_op = ceph_netfs_issue_op,
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.issue_read = ceph_netfs_issue_read,
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.expand_readahead = ceph_netfs_expand_readahead,
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.clamp_length = ceph_netfs_clamp_length,
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.check_write_begin = ceph_netfs_check_write_begin,
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@ -37,7 +37,7 @@ static void netfs_put_subrequest(struct netfs_io_subrequest *subreq,
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__netfs_put_subrequest(subreq, was_async);
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}
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static struct netfs_io_request *netfs_alloc_read_request(
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static struct netfs_io_request *netfs_alloc_request(
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const struct netfs_request_ops *ops, void *netfs_priv,
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struct file *file)
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{
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@ -63,13 +63,12 @@ static struct netfs_io_request *netfs_alloc_read_request(
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return rreq;
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}
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static void netfs_get_read_request(struct netfs_io_request *rreq)
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static void netfs_get_request(struct netfs_io_request *rreq)
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{
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refcount_inc(&rreq->usage);
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}
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static void netfs_rreq_clear_subreqs(struct netfs_io_request *rreq,
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bool was_async)
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static void netfs_clear_subrequests(struct netfs_io_request *rreq, bool was_async)
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{
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struct netfs_io_subrequest *subreq;
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@ -81,11 +80,11 @@ static void netfs_rreq_clear_subreqs(struct netfs_io_request *rreq,
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}
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}
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static void netfs_free_read_request(struct work_struct *work)
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static void netfs_free_request(struct work_struct *work)
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{
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struct netfs_io_request *rreq =
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container_of(work, struct netfs_io_request, work);
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netfs_rreq_clear_subreqs(rreq, false);
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netfs_clear_subrequests(rreq, false);
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if (rreq->netfs_priv)
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rreq->netfs_ops->cleanup(rreq->mapping, rreq->netfs_priv);
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trace_netfs_rreq(rreq, netfs_rreq_trace_free);
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@ -95,15 +94,15 @@ static void netfs_free_read_request(struct work_struct *work)
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netfs_stat_d(&netfs_n_rh_rreq);
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}
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static void netfs_put_read_request(struct netfs_io_request *rreq, bool was_async)
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static void netfs_put_request(struct netfs_io_request *rreq, bool was_async)
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{
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if (refcount_dec_and_test(&rreq->usage)) {
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if (was_async) {
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rreq->work.func = netfs_free_read_request;
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rreq->work.func = netfs_free_request;
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if (!queue_work(system_unbound_wq, &rreq->work))
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BUG();
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} else {
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netfs_free_read_request(&rreq->work);
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netfs_free_request(&rreq->work);
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}
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}
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}
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@ -121,14 +120,14 @@ static struct netfs_io_subrequest *netfs_alloc_subrequest(
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INIT_LIST_HEAD(&subreq->rreq_link);
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refcount_set(&subreq->usage, 2);
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subreq->rreq = rreq;
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netfs_get_read_request(rreq);
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netfs_get_request(rreq);
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netfs_stat(&netfs_n_rh_sreq);
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}
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return subreq;
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}
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static void netfs_get_read_subrequest(struct netfs_io_subrequest *subreq)
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static void netfs_get_subrequest(struct netfs_io_subrequest *subreq)
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{
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refcount_inc(&subreq->usage);
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}
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@ -141,7 +140,7 @@ static void __netfs_put_subrequest(struct netfs_io_subrequest *subreq,
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trace_netfs_sreq(subreq, netfs_sreq_trace_free);
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kfree(subreq);
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netfs_stat_d(&netfs_n_rh_sreq);
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netfs_put_read_request(rreq, was_async);
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netfs_put_request(rreq, was_async);
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}
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/*
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@ -216,7 +215,7 @@ static void netfs_read_from_server(struct netfs_io_request *rreq,
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struct netfs_io_subrequest *subreq)
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{
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netfs_stat(&netfs_n_rh_download);
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rreq->netfs_ops->issue_op(subreq);
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rreq->netfs_ops->issue_read(subreq);
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}
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/*
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@ -225,8 +224,8 @@ static void netfs_read_from_server(struct netfs_io_request *rreq,
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static void netfs_rreq_completed(struct netfs_io_request *rreq, bool was_async)
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{
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trace_netfs_rreq(rreq, netfs_rreq_trace_done);
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netfs_rreq_clear_subreqs(rreq, was_async);
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netfs_put_read_request(rreq, was_async);
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netfs_clear_subrequests(rreq, was_async);
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netfs_put_request(rreq, was_async);
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}
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/*
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@ -306,7 +305,7 @@ static void netfs_rreq_do_write_to_cache(struct netfs_io_request *rreq)
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atomic_inc(&rreq->nr_copy_ops);
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list_for_each_entry_safe(subreq, p, &rreq->subrequests, rreq_link) {
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if (!test_bit(NETFS_SREQ_WRITE_TO_CACHE, &subreq->flags)) {
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if (!test_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags)) {
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list_del_init(&subreq->rreq_link);
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netfs_put_subrequest(subreq, false);
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}
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@ -336,7 +335,7 @@ static void netfs_rreq_do_write_to_cache(struct netfs_io_request *rreq)
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atomic_inc(&rreq->nr_copy_ops);
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netfs_stat(&netfs_n_rh_write);
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netfs_get_read_subrequest(subreq);
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netfs_get_subrequest(subreq);
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trace_netfs_sreq(subreq, netfs_sreq_trace_write);
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cres->ops->write(cres, subreq->start, &iter,
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netfs_rreq_copy_terminated, subreq);
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@ -378,9 +377,9 @@ static void netfs_rreq_unlock(struct netfs_io_request *rreq)
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XA_STATE(xas, &rreq->mapping->i_pages, start_page);
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if (test_bit(NETFS_RREQ_FAILED, &rreq->flags)) {
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__clear_bit(NETFS_RREQ_WRITE_TO_CACHE, &rreq->flags);
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__clear_bit(NETFS_RREQ_COPY_TO_CACHE, &rreq->flags);
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list_for_each_entry(subreq, &rreq->subrequests, rreq_link) {
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__clear_bit(NETFS_SREQ_WRITE_TO_CACHE, &subreq->flags);
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__clear_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags);
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}
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}
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@ -408,7 +407,7 @@ static void netfs_rreq_unlock(struct netfs_io_request *rreq)
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pg_failed = true;
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break;
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}
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if (test_bit(NETFS_SREQ_WRITE_TO_CACHE, &subreq->flags))
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if (test_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags))
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folio_start_fscache(folio);
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pg_failed |= subreq_failed;
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if (pgend < iopos + subreq->len)
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@ -453,13 +452,13 @@ static void netfs_rreq_unlock(struct netfs_io_request *rreq)
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static void netfs_rreq_short_read(struct netfs_io_request *rreq,
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struct netfs_io_subrequest *subreq)
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{
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__clear_bit(NETFS_SREQ_SHORT_READ, &subreq->flags);
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__clear_bit(NETFS_SREQ_SHORT_IO, &subreq->flags);
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__set_bit(NETFS_SREQ_SEEK_DATA_READ, &subreq->flags);
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netfs_stat(&netfs_n_rh_short_read);
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trace_netfs_sreq(subreq, netfs_sreq_trace_resubmit_short);
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netfs_get_read_subrequest(subreq);
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netfs_get_subrequest(subreq);
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atomic_inc(&rreq->nr_outstanding);
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if (subreq->source == NETFS_READ_FROM_CACHE)
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netfs_read_from_cache(rreq, subreq, NETFS_READ_HOLE_CLEAR);
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@ -493,10 +492,10 @@ static bool netfs_rreq_perform_resubmissions(struct netfs_io_request *rreq)
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subreq->error = 0;
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netfs_stat(&netfs_n_rh_download_instead);
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trace_netfs_sreq(subreq, netfs_sreq_trace_download_instead);
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netfs_get_read_subrequest(subreq);
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netfs_get_subrequest(subreq);
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atomic_inc(&rreq->nr_outstanding);
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netfs_read_from_server(rreq, subreq);
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} else if (test_bit(NETFS_SREQ_SHORT_READ, &subreq->flags)) {
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} else if (test_bit(NETFS_SREQ_SHORT_IO, &subreq->flags)) {
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netfs_rreq_short_read(rreq, subreq);
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}
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}
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@ -553,7 +552,7 @@ again:
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clear_bit_unlock(NETFS_RREQ_IN_PROGRESS, &rreq->flags);
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wake_up_bit(&rreq->flags, NETFS_RREQ_IN_PROGRESS);
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if (test_bit(NETFS_RREQ_WRITE_TO_CACHE, &rreq->flags))
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if (test_bit(NETFS_RREQ_COPY_TO_CACHE, &rreq->flags))
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return netfs_rreq_write_to_cache(rreq);
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netfs_rreq_completed(rreq, was_async);
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@ -642,8 +641,8 @@ void netfs_subreq_terminated(struct netfs_io_subrequest *subreq,
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complete:
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__clear_bit(NETFS_SREQ_NO_PROGRESS, &subreq->flags);
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if (test_bit(NETFS_SREQ_WRITE_TO_CACHE, &subreq->flags))
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set_bit(NETFS_RREQ_WRITE_TO_CACHE, &rreq->flags);
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if (test_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags))
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set_bit(NETFS_RREQ_COPY_TO_CACHE, &rreq->flags);
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out:
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trace_netfs_sreq(subreq, netfs_sreq_trace_terminated);
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@ -674,7 +673,7 @@ incomplete:
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__clear_bit(NETFS_SREQ_NO_PROGRESS, &subreq->flags);
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}
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__set_bit(NETFS_SREQ_SHORT_READ, &subreq->flags);
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__set_bit(NETFS_SREQ_SHORT_IO, &subreq->flags);
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set_bit(NETFS_RREQ_INCOMPLETE_IO, &rreq->flags);
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goto out;
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@ -878,7 +877,7 @@ void netfs_readahead(struct readahead_control *ractl,
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if (readahead_count(ractl) == 0)
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goto cleanup;
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rreq = netfs_alloc_read_request(ops, netfs_priv, ractl->file);
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rreq = netfs_alloc_request(ops, netfs_priv, ractl->file);
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if (!rreq)
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goto cleanup;
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rreq->mapping = ractl->mapping;
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@ -916,7 +915,7 @@ void netfs_readahead(struct readahead_control *ractl,
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return;
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cleanup_free:
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netfs_put_read_request(rreq, false);
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netfs_put_request(rreq, false);
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return;
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cleanup:
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if (netfs_priv)
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@ -953,7 +952,7 @@ int netfs_readpage(struct file *file,
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_enter("%lx", folio_index(folio));
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rreq = netfs_alloc_read_request(ops, netfs_priv, file);
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rreq = netfs_alloc_request(ops, netfs_priv, file);
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if (!rreq) {
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if (netfs_priv)
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ops->cleanup(folio_file_mapping(folio), netfs_priv);
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@ -975,7 +974,7 @@ int netfs_readpage(struct file *file,
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netfs_stat(&netfs_n_rh_readpage);
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trace_netfs_read(rreq, rreq->start, rreq->len, netfs_read_trace_readpage);
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netfs_get_read_request(rreq);
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netfs_get_request(rreq);
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atomic_set(&rreq->nr_outstanding, 1);
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do {
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@ -989,7 +988,8 @@ int netfs_readpage(struct file *file,
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* process.
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*/
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do {
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wait_var_event(&rreq->nr_outstanding, atomic_read(&rreq->nr_outstanding) == 1);
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wait_var_event(&rreq->nr_outstanding,
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atomic_read(&rreq->nr_outstanding) == 1);
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netfs_rreq_assess(rreq, false);
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} while (test_bit(NETFS_RREQ_IN_PROGRESS, &rreq->flags));
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@ -999,7 +999,7 @@ int netfs_readpage(struct file *file,
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ret = -EIO;
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}
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out:
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netfs_put_read_request(rreq, false);
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netfs_put_request(rreq, false);
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return ret;
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}
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EXPORT_SYMBOL(netfs_readpage);
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@ -1122,7 +1122,7 @@ retry:
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}
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ret = -ENOMEM;
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rreq = netfs_alloc_read_request(ops, netfs_priv, file);
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||||
rreq = netfs_alloc_request(ops, netfs_priv, file);
|
||||
if (!rreq)
|
||||
goto error;
|
||||
rreq->mapping = folio_file_mapping(folio);
|
||||
@ -1146,7 +1146,7 @@ retry:
|
||||
*/
|
||||
ractl._nr_pages = folio_nr_pages(folio);
|
||||
netfs_rreq_expand(rreq, &ractl);
|
||||
netfs_get_read_request(rreq);
|
||||
netfs_get_request(rreq);
|
||||
|
||||
/* We hold the folio locks, so we can drop the references */
|
||||
folio_get(folio);
|
||||
@ -1160,12 +1160,13 @@ retry:
|
||||
|
||||
} while (rreq->submitted < rreq->len);
|
||||
|
||||
/* Keep nr_outstanding incremented so that the ref always belongs to us, and
|
||||
* the service code isn't punted off to a random thread pool to
|
||||
/* Keep nr_outstanding incremented so that the ref always belongs to
|
||||
* us, and the service code isn't punted off to a random thread pool to
|
||||
* process.
|
||||
*/
|
||||
for (;;) {
|
||||
wait_var_event(&rreq->nr_outstanding, atomic_read(&rreq->nr_outstanding) == 1);
|
||||
wait_var_event(&rreq->nr_outstanding,
|
||||
atomic_read(&rreq->nr_outstanding) == 1);
|
||||
netfs_rreq_assess(rreq, false);
|
||||
if (!test_bit(NETFS_RREQ_IN_PROGRESS, &rreq->flags))
|
||||
break;
|
||||
@ -1177,7 +1178,7 @@ retry:
|
||||
trace_netfs_failure(rreq, NULL, ret, netfs_fail_short_write_begin);
|
||||
ret = -EIO;
|
||||
}
|
||||
netfs_put_read_request(rreq, false);
|
||||
netfs_put_request(rreq, false);
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
|
||||
@ -1193,7 +1194,7 @@ have_folio_no_wait:
|
||||
return 0;
|
||||
|
||||
error_put:
|
||||
netfs_put_read_request(rreq, false);
|
||||
netfs_put_request(rreq, false);
|
||||
error:
|
||||
folio_unlock(folio);
|
||||
folio_put(folio);
|
||||
|
||||
@ -131,7 +131,7 @@ struct netfs_cache_resources {
|
||||
* Descriptor for a single component subrequest.
|
||||
*/
|
||||
struct netfs_io_subrequest {
|
||||
struct netfs_io_request *rreq; /* Supervising read request */
|
||||
struct netfs_io_request *rreq; /* Supervising I/O request */
|
||||
struct list_head rreq_link; /* Link in rreq->subrequests */
|
||||
loff_t start; /* Where to start the I/O */
|
||||
size_t len; /* Size of the I/O */
|
||||
@ -139,29 +139,29 @@ struct netfs_io_subrequest {
|
||||
refcount_t usage;
|
||||
short error; /* 0 or error that occurred */
|
||||
unsigned short debug_index; /* Index in list (for debugging output) */
|
||||
enum netfs_io_source source; /* Where to read from */
|
||||
enum netfs_io_source source; /* Where to read from/write to */
|
||||
unsigned long flags;
|
||||
#define NETFS_SREQ_WRITE_TO_CACHE 0 /* Set if should write to cache */
|
||||
#define NETFS_SREQ_COPY_TO_CACHE 0 /* Set if should copy the data to the cache */
|
||||
#define NETFS_SREQ_CLEAR_TAIL 1 /* Set if the rest of the read should be cleared */
|
||||
#define NETFS_SREQ_SHORT_READ 2 /* Set if there was a short read from the cache */
|
||||
#define NETFS_SREQ_SHORT_IO 2 /* Set if the I/O was short */
|
||||
#define NETFS_SREQ_SEEK_DATA_READ 3 /* Set if ->read() should SEEK_DATA first */
|
||||
#define NETFS_SREQ_NO_PROGRESS 4 /* Set if we didn't manage to read any data */
|
||||
};
|
||||
|
||||
/*
|
||||
* Descriptor for a read helper request. This is used to make multiple I/O
|
||||
* requests on a variety of sources and then stitch the result together.
|
||||
* Descriptor for an I/O helper request. This is used to make multiple I/O
|
||||
* operations to a variety of data stores and then stitch the result together.
|
||||
*/
|
||||
struct netfs_io_request {
|
||||
struct work_struct work;
|
||||
struct inode *inode; /* The file being accessed */
|
||||
struct address_space *mapping; /* The mapping being accessed */
|
||||
struct netfs_cache_resources cache_resources;
|
||||
struct list_head subrequests; /* Requests to fetch I/O from disk or net */
|
||||
struct list_head subrequests; /* Contributory I/O operations */
|
||||
void *netfs_priv; /* Private data for the netfs */
|
||||
unsigned int debug_id;
|
||||
atomic_t nr_outstanding; /* Number of read ops in progress */
|
||||
atomic_t nr_copy_ops; /* Number of write ops in progress */
|
||||
atomic_t nr_outstanding; /* Number of ops in progress */
|
||||
atomic_t nr_copy_ops; /* Number of copy-to-cache ops in progress */
|
||||
size_t submitted; /* Amount submitted for I/O so far */
|
||||
size_t len; /* Length of the request */
|
||||
short error; /* 0 or error that occurred */
|
||||
@ -171,7 +171,7 @@ struct netfs_io_request {
|
||||
refcount_t usage;
|
||||
unsigned long flags;
|
||||
#define NETFS_RREQ_INCOMPLETE_IO 0 /* Some ioreqs terminated short or with error */
|
||||
#define NETFS_RREQ_WRITE_TO_CACHE 1 /* Need to write to the cache */
|
||||
#define NETFS_RREQ_COPY_TO_CACHE 1 /* Need to write to the cache */
|
||||
#define NETFS_RREQ_NO_UNLOCK_FOLIO 2 /* Don't unlock no_unlock_folio on completion */
|
||||
#define NETFS_RREQ_DONT_UNLOCK_FOLIOS 3 /* Don't unlock the folios on completion */
|
||||
#define NETFS_RREQ_FAILED 4 /* The request failed */
|
||||
@ -188,7 +188,7 @@ struct netfs_request_ops {
|
||||
int (*begin_cache_operation)(struct netfs_io_request *rreq);
|
||||
void (*expand_readahead)(struct netfs_io_request *rreq);
|
||||
bool (*clamp_length)(struct netfs_io_subrequest *subreq);
|
||||
void (*issue_op)(struct netfs_io_subrequest *subreq);
|
||||
void (*issue_read)(struct netfs_io_subrequest *subreq);
|
||||
bool (*is_still_valid)(struct netfs_io_request *rreq);
|
||||
int (*check_write_begin)(struct file *file, loff_t pos, unsigned len,
|
||||
struct folio *folio, void **_fsdata);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user