summaryrefslogtreecommitdiff
path: root/fs/fuse/virtio_fs.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/fuse/virtio_fs.c')
-rw-r--r--fs/fuse/virtio_fs.c77
1 files changed, 42 insertions, 35 deletions
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 6404a189e989..d88d3fc5306a 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -97,7 +97,8 @@ struct virtio_fs_req_work {
};
static int virtio_fs_enqueue_req(struct virtio_fs_vq *fsvq,
- struct fuse_req *req, bool in_flight);
+ struct fuse_req *req, bool in_flight,
+ gfp_t gfp);
static const struct constant_table dax_param_enums[] = {
{"always", FUSE_DAX_ALWAYS },
@@ -575,6 +576,8 @@ static void virtio_fs_request_dispatch_work(struct work_struct *work)
/* Dispatch pending requests */
while (1) {
+ unsigned int flags;
+
spin_lock(&fsvq->lock);
req = list_first_entry_or_null(&fsvq->queued_reqs,
struct fuse_req, list);
@@ -585,7 +588,9 @@ static void virtio_fs_request_dispatch_work(struct work_struct *work)
list_del_init(&req->list);
spin_unlock(&fsvq->lock);
- ret = virtio_fs_enqueue_req(fsvq, req, true);
+ flags = memalloc_nofs_save();
+ ret = virtio_fs_enqueue_req(fsvq, req, true, GFP_KERNEL);
+ memalloc_nofs_restore(flags);
if (ret < 0) {
if (ret == -ENOSPC) {
spin_lock(&fsvq->lock);
@@ -686,7 +691,7 @@ static void virtio_fs_hiprio_dispatch_work(struct work_struct *work)
}
/* Allocate and copy args into req->argbuf */
-static int copy_args_to_argbuf(struct fuse_req *req)
+static int copy_args_to_argbuf(struct fuse_req *req, gfp_t gfp)
{
struct fuse_args *args = req->args;
unsigned int offset = 0;
@@ -700,7 +705,7 @@ static int copy_args_to_argbuf(struct fuse_req *req)
len = fuse_len_args(num_in, (struct fuse_arg *) args->in_args) +
fuse_len_args(num_out, args->out_args);
- req->argbuf = kmalloc(len, GFP_ATOMIC);
+ req->argbuf = kmalloc(len, gfp);
if (!req->argbuf)
return -ENOMEM;
@@ -760,7 +765,7 @@ static void virtio_fs_request_complete(struct fuse_req *req,
struct fuse_args *args;
struct fuse_args_pages *ap;
unsigned int len, i, thislen;
- struct page *page;
+ struct folio *folio;
/*
* TODO verify that server properly follows FUSE protocol
@@ -772,12 +777,12 @@ static void virtio_fs_request_complete(struct fuse_req *req,
if (args->out_pages && args->page_zeroing) {
len = args->out_args[args->out_numargs - 1].size;
ap = container_of(args, typeof(*ap), args);
- for (i = 0; i < ap->num_pages; i++) {
+ for (i = 0; i < ap->num_folios; i++) {
thislen = ap->descs[i].length;
if (len < thislen) {
WARN_ON(ap->descs[i].offset);
- page = ap->pages[i];
- zero_user_segment(page, len, thislen);
+ folio = ap->folios[i];
+ folio_zero_segment(folio, len, thislen);
len = 0;
} else {
len -= thislen;
@@ -1267,15 +1272,15 @@ static void virtio_fs_send_interrupt(struct fuse_iqueue *fiq, struct fuse_req *r
}
/* Count number of scatter-gather elements required */
-static unsigned int sg_count_fuse_pages(struct fuse_page_desc *page_descs,
- unsigned int num_pages,
- unsigned int total_len)
+static unsigned int sg_count_fuse_folios(struct fuse_folio_desc *folio_descs,
+ unsigned int num_folios,
+ unsigned int total_len)
{
unsigned int i;
unsigned int this_len;
- for (i = 0; i < num_pages && total_len; i++) {
- this_len = min(page_descs[i].length, total_len);
+ for (i = 0; i < num_folios && total_len; i++) {
+ this_len = min(folio_descs[i].length, total_len);
total_len -= this_len;
}
@@ -1294,8 +1299,8 @@ static unsigned int sg_count_fuse_req(struct fuse_req *req)
if (args->in_pages) {
size = args->in_args[args->in_numargs - 1].size;
- total_sgs += sg_count_fuse_pages(ap->descs, ap->num_pages,
- size);
+ total_sgs += sg_count_fuse_folios(ap->descs, ap->num_folios,
+ size);
}
if (!test_bit(FR_ISREPLY, &req->flags))
@@ -1308,27 +1313,27 @@ static unsigned int sg_count_fuse_req(struct fuse_req *req)
if (args->out_pages) {
size = args->out_args[args->out_numargs - 1].size;
- total_sgs += sg_count_fuse_pages(ap->descs, ap->num_pages,
- size);
+ total_sgs += sg_count_fuse_folios(ap->descs, ap->num_folios,
+ size);
}
return total_sgs;
}
-/* Add pages to scatter-gather list and return number of elements used */
-static unsigned int sg_init_fuse_pages(struct scatterlist *sg,
- struct page **pages,
- struct fuse_page_desc *page_descs,
- unsigned int num_pages,
- unsigned int total_len)
+/* Add folios to scatter-gather list and return number of elements used */
+static unsigned int sg_init_fuse_folios(struct scatterlist *sg,
+ struct folio **folios,
+ struct fuse_folio_desc *folio_descs,
+ unsigned int num_folios,
+ unsigned int total_len)
{
unsigned int i;
unsigned int this_len;
- for (i = 0; i < num_pages && total_len; i++) {
+ for (i = 0; i < num_folios && total_len; i++) {
sg_init_table(&sg[i], 1);
- this_len = min(page_descs[i].length, total_len);
- sg_set_page(&sg[i], pages[i], this_len, page_descs[i].offset);
+ this_len = min(folio_descs[i].length, total_len);
+ sg_set_folio(&sg[i], folios[i], this_len, folio_descs[i].offset);
total_len -= this_len;
}
@@ -1353,10 +1358,10 @@ static unsigned int sg_init_fuse_args(struct scatterlist *sg,
sg_init_one(&sg[total_sgs++], argbuf, len);
if (argpages)
- total_sgs += sg_init_fuse_pages(&sg[total_sgs],
- ap->pages, ap->descs,
- ap->num_pages,
- args[numargs - 1].size);
+ total_sgs += sg_init_fuse_folios(&sg[total_sgs],
+ ap->folios, ap->descs,
+ ap->num_folios,
+ args[numargs - 1].size);
if (len_used)
*len_used = len;
@@ -1366,7 +1371,8 @@ static unsigned int sg_init_fuse_args(struct scatterlist *sg,
/* Add a request to a virtqueue and kick the device */
static int virtio_fs_enqueue_req(struct virtio_fs_vq *fsvq,
- struct fuse_req *req, bool in_flight)
+ struct fuse_req *req, bool in_flight,
+ gfp_t gfp)
{
/* requests need at least 4 elements */
struct scatterlist *stack_sgs[6];
@@ -1387,8 +1393,8 @@ static int virtio_fs_enqueue_req(struct virtio_fs_vq *fsvq,
/* Does the sglist fit on the stack? */
total_sgs = sg_count_fuse_req(req);
if (total_sgs > ARRAY_SIZE(stack_sgs)) {
- sgs = kmalloc_array(total_sgs, sizeof(sgs[0]), GFP_ATOMIC);
- sg = kmalloc_array(total_sgs, sizeof(sg[0]), GFP_ATOMIC);
+ sgs = kmalloc_array(total_sgs, sizeof(sgs[0]), gfp);
+ sg = kmalloc_array(total_sgs, sizeof(sg[0]), gfp);
if (!sgs || !sg) {
ret = -ENOMEM;
goto out;
@@ -1396,7 +1402,7 @@ static int virtio_fs_enqueue_req(struct virtio_fs_vq *fsvq,
}
/* Use a bounce buffer since stack args cannot be mapped */
- ret = copy_args_to_argbuf(req);
+ ret = copy_args_to_argbuf(req, gfp);
if (ret < 0)
goto out;
@@ -1490,7 +1496,7 @@ static void virtio_fs_send_req(struct fuse_iqueue *fiq, struct fuse_req *req)
queue_id);
fsvq = &fs->vqs[queue_id];
- ret = virtio_fs_enqueue_req(fsvq, req, false);
+ ret = virtio_fs_enqueue_req(fsvq, req, false, GFP_ATOMIC);
if (ret < 0) {
if (ret == -ENOSPC) {
/*
@@ -1691,6 +1697,7 @@ static int virtio_fs_get_tree(struct fs_context *fsc)
fc->delete_stale = true;
fc->auto_submounts = true;
fc->sync_fs = true;
+ fc->use_pages_for_kvec_io = true;
/* Tell FUSE to split requests that exceed the virtqueue's size */
fc->max_pages_limit = min_t(unsigned int, fc->max_pages_limit,
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-06 00:35:04 +0300