* [PATCH 5/6] netfs, afs, ceph: Use folios
2021-08-24 13:24 [PATCH 0/6] netfs, afs, ceph: Support folios, at least partially David Howells
` (3 preceding siblings ...)
2021-08-24 13:25 ` [PATCH 4/6] afs: Sort out symlink reading David Howells
@ 2021-08-24 13:25 ` David Howells
2021-08-24 13:25 ` [PATCH 6/6] afs: Use folios in directory handling David Howells
5 siblings, 0 replies; 12+ messages in thread
From: David Howells @ 2021-08-24 13:25 UTC (permalink / raw)
To: Matthew Wilcox (Oracle)
Cc: Jeff Layton, Marc Dionne, Ilya Dryomov, linux-afs, ceph-devel,
linux-cachefs, dhowells, Jeff Layton, Ilya Dryomov,
linux-fsdevel, linux-cachefs, linux-afs, linux-nfs, linux-cifs,
ceph-devel, v9fs-developer, devel, linux-mm, linux-kernel
Convert the netfs helper library to use folios throughout, convert the afs
filesystem to use folios in its file I/O paths and convert the ceph
filesystem to use just enough folios to compile.
With these changes, afs passes -g quick xfstests.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Matthew Wilcox (Oracle) <willy@infradead.org>
cc: Jeff Layton <jlayton@kernel.org>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Ilya Dryomov <idryomov@gmail.com>
cc: linux-afs@lists.infradead.org
cc: ceph-devel@vger.kernel.org
cc: linux-cachefs@redhat.com
---
fs/afs/file.c | 70 +++++----
fs/afs/internal.h | 46 +++---
fs/afs/write.c | 333 +++++++++++++++++++++-----------------------
fs/ceph/addr.c | 80 ++++++-----
fs/netfs/read_helper.c | 165 +++++++++++-----------
include/linux/netfs.h | 12 +-
include/trace/events/afs.h | 21 +--
7 files changed, 363 insertions(+), 364 deletions(-)
diff --git a/fs/afs/file.c b/fs/afs/file.c
index daa9106b9654..2c07958cde95 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -315,23 +315,24 @@ static void afs_req_issue_op(struct netfs_read_subrequest *subreq)
static int afs_symlink_readpage(struct file *file, struct page *page)
{
- struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
+ struct afs_vnode *vnode = AFS_FS_I(page_mapping(page)->host);
struct afs_read *fsreq;
+ struct folio *folio = page_folio(page);
int ret;
fsreq = afs_alloc_read(GFP_NOFS);
if (!fsreq)
return -ENOMEM;
- fsreq->pos = page->index * PAGE_SIZE;
- fsreq->len = PAGE_SIZE;
+ fsreq->pos = folio_file_pos(folio);
+ fsreq->len = folio_size(folio);
fsreq->vnode = vnode;
fsreq->iter = &fsreq->def_iter;
iov_iter_xarray(&fsreq->def_iter, READ, &page->mapping->i_pages,
fsreq->pos, fsreq->len);
ret = afs_fetch_data(fsreq->vnode, fsreq);
- page_endio(page, false, ret);
+ page_endio(&folio->page, false, ret);
return ret;
}
@@ -355,7 +356,7 @@ static int afs_begin_cache_operation(struct netfs_read_request *rreq)
}
static int afs_check_write_begin(struct file *file, loff_t pos, unsigned len,
- struct page *page, void **_fsdata)
+ struct folio *folio, void **_fsdata)
{
struct afs_vnode *vnode = AFS_FS_I(file_inode(file));
@@ -378,7 +379,9 @@ const struct netfs_read_request_ops afs_req_ops = {
static int afs_readpage(struct file *file, struct page *page)
{
- return netfs_readpage(file, page, &afs_req_ops, NULL);
+ struct folio *folio = page_folio(page);
+
+ return netfs_readpage(file, folio, &afs_req_ops, NULL);
}
static void afs_readahead(struct readahead_control *ractl)
@@ -390,29 +393,29 @@ static void afs_readahead(struct readahead_control *ractl)
* Adjust the dirty region of the page on truncation or full invalidation,
* getting rid of the markers altogether if the region is entirely invalidated.
*/
-static void afs_invalidate_dirty(struct page *page, unsigned int offset,
+static void afs_invalidate_dirty(struct folio *folio, unsigned int offset,
unsigned int length)
{
- struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
+ struct afs_vnode *vnode = AFS_FS_I(folio_inode(folio));
unsigned long priv;
unsigned int f, t, end = offset + length;
- priv = page_private(page);
+ priv = (unsigned long)folio_get_private(folio);
/* we clean up only if the entire page is being invalidated */
- if (offset == 0 && length == thp_size(page))
+ if (offset == 0 && length == folio_size(folio))
goto full_invalidate;
/* If the page was dirtied by page_mkwrite(), the PTE stays writable
* and we don't get another notification to tell us to expand it
* again.
*/
- if (afs_is_page_dirty_mmapped(priv))
+ if (afs_is_folio_dirty_mmapped(priv))
return;
/* We may need to shorten the dirty region */
- f = afs_page_dirty_from(page, priv);
- t = afs_page_dirty_to(page, priv);
+ f = afs_folio_dirty_from(folio, priv);
+ t = afs_folio_dirty_to(folio, priv);
if (t <= offset || f >= end)
return; /* Doesn't overlap */
@@ -430,17 +433,17 @@ static void afs_invalidate_dirty(struct page *page, unsigned int offset,
if (f == t)
goto undirty;
- priv = afs_page_dirty(page, f, t);
- set_page_private(page, priv);
- trace_afs_page_dirty(vnode, tracepoint_string("trunc"), page);
+ priv = afs_folio_dirty(folio, f, t);
+ folio_change_private(folio, (void *)priv);
+ trace_afs_folio_dirty(vnode, tracepoint_string("trunc"), folio);
return;
undirty:
- trace_afs_page_dirty(vnode, tracepoint_string("undirty"), page);
- clear_page_dirty_for_io(page);
+ trace_afs_folio_dirty(vnode, tracepoint_string("undirty"), folio);
+ folio_clear_dirty_for_io(folio);
full_invalidate:
- trace_afs_page_dirty(vnode, tracepoint_string("inval"), page);
- detach_page_private(page);
+ trace_afs_folio_dirty(vnode, tracepoint_string("inval"), folio);
+ folio_detach_private(folio);
}
/*
@@ -451,14 +454,16 @@ static void afs_invalidate_dirty(struct page *page, unsigned int offset,
static void afs_invalidatepage(struct page *page, unsigned int offset,
unsigned int length)
{
- _enter("{%lu},%u,%u", page->index, offset, length);
+ struct folio *folio = page_folio(page);
+
+ _enter("{%lu},%u,%u", folio_index(folio), offset, length);
BUG_ON(!PageLocked(page));
if (PagePrivate(page))
- afs_invalidate_dirty(page, offset, length);
+ afs_invalidate_dirty(folio, offset, length);
- wait_on_page_fscache(page);
+ folio_wait_fscache(folio);
_leave("");
}
@@ -468,30 +473,31 @@ static void afs_invalidatepage(struct page *page, unsigned int offset,
*/
static int afs_releasepage(struct page *page, gfp_t gfp_flags)
{
- struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
+ struct folio *folio = page_folio(page);
+ struct afs_vnode *vnode = AFS_FS_I(folio_inode(folio));
_enter("{{%llx:%llu}[%lu],%lx},%x",
- vnode->fid.vid, vnode->fid.vnode, page->index, page->flags,
+ vnode->fid.vid, vnode->fid.vnode, folio_index(folio), folio->flags,
gfp_flags);
/* deny if page is being written to the cache and the caller hasn't
* elected to wait */
#ifdef CONFIG_AFS_FSCACHE
- if (PageFsCache(page)) {
+ if (folio_test_fscache(folio)) {
if (!(gfp_flags & __GFP_DIRECT_RECLAIM) || !(gfp_flags & __GFP_FS))
return false;
- wait_on_page_fscache(page);
+ folio_wait_fscache(folio);
}
#endif
- if (PagePrivate(page)) {
- trace_afs_page_dirty(vnode, tracepoint_string("rel"), page);
- detach_page_private(page);
+ if (folio_test_private(folio)) {
+ trace_afs_folio_dirty(vnode, tracepoint_string("rel"), folio);
+ folio_detach_private(folio);
}
- /* indicate that the page can be released */
+ /* Indicate that the folio can be released */
_leave(" = T");
- return 1;
+ return true;
}
/*
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index beaef0387e85..f16cc7d7ae1d 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -867,59 +867,59 @@ struct afs_vnode_cache_aux {
} __packed;
/*
- * We use page->private to hold the amount of the page that we've written to,
+ * We use folio->private to hold the amount of the folio that we've written to,
* splitting the field into two parts. However, we need to represent a range
- * 0...PAGE_SIZE, so we reduce the resolution if the size of the page
+ * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio
* exceeds what we can encode.
*/
#ifdef CONFIG_64BIT
-#define __AFS_PAGE_PRIV_MASK 0x7fffffffUL
-#define __AFS_PAGE_PRIV_SHIFT 32
-#define __AFS_PAGE_PRIV_MMAPPED 0x80000000UL
+#define __AFS_FOLIO_PRIV_MASK 0x7fffffffUL
+#define __AFS_FOLIO_PRIV_SHIFT 32
+#define __AFS_FOLIO_PRIV_MMAPPED 0x80000000UL
#else
-#define __AFS_PAGE_PRIV_MASK 0x7fffUL
-#define __AFS_PAGE_PRIV_SHIFT 16
-#define __AFS_PAGE_PRIV_MMAPPED 0x8000UL
+#define __AFS_FOLIO_PRIV_MASK 0x7fffUL
+#define __AFS_FOLIO_PRIV_SHIFT 16
+#define __AFS_FOLIO_PRIV_MMAPPED 0x8000UL
#endif
-static inline unsigned int afs_page_dirty_resolution(struct page *page)
+static inline unsigned int afs_folio_dirty_resolution(struct folio *folio)
{
- int shift = thp_order(page) + PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1);
+ int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1);
return (shift > 0) ? shift : 0;
}
-static inline size_t afs_page_dirty_from(struct page *page, unsigned long priv)
+static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv)
{
- unsigned long x = priv & __AFS_PAGE_PRIV_MASK;
+ unsigned long x = priv & __AFS_FOLIO_PRIV_MASK;
/* The lower bound is inclusive */
- return x << afs_page_dirty_resolution(page);
+ return x << afs_folio_dirty_resolution(folio);
}
-static inline size_t afs_page_dirty_to(struct page *page, unsigned long priv)
+static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv)
{
- unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK;
+ unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK;
/* The upper bound is immediately beyond the region */
- return (x + 1) << afs_page_dirty_resolution(page);
+ return (x + 1) << afs_folio_dirty_resolution(folio);
}
-static inline unsigned long afs_page_dirty(struct page *page, size_t from, size_t to)
+static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to)
{
- unsigned int res = afs_page_dirty_resolution(page);
+ unsigned int res = afs_folio_dirty_resolution(folio);
from >>= res;
to = (to - 1) >> res;
- return (to << __AFS_PAGE_PRIV_SHIFT) | from;
+ return (to << __AFS_FOLIO_PRIV_SHIFT) | from;
}
-static inline unsigned long afs_page_dirty_mmapped(unsigned long priv)
+static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv)
{
- return priv | __AFS_PAGE_PRIV_MMAPPED;
+ return priv | __AFS_FOLIO_PRIV_MMAPPED;
}
-static inline bool afs_is_page_dirty_mmapped(unsigned long priv)
+static inline bool afs_is_folio_dirty_mmapped(unsigned long priv)
{
- return priv & __AFS_PAGE_PRIV_MMAPPED;
+ return priv & __AFS_FOLIO_PRIV_MMAPPED;
}
#include <trace/events/afs.h>
diff --git a/fs/afs/write.c b/fs/afs/write.c
index fff4c7d88e0d..4e19672e634d 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -32,7 +32,7 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
struct page **_page, void **fsdata)
{
struct afs_vnode *vnode = AFS_FS_I(file_inode(file));
- struct page *page;
+ struct folio *folio;
unsigned long priv;
unsigned f, from;
unsigned t, to;
@@ -46,12 +46,12 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
* file. We need to do this before we get a lock on the page in case
* there's more than one writer competing for the same cache block.
*/
- ret = netfs_write_begin(file, mapping, pos, len, flags, &page, fsdata,
+ ret = netfs_write_begin(file, mapping, pos, len, flags, &folio, fsdata,
&afs_req_ops, NULL);
if (ret < 0)
return ret;
- index = page->index;
+ index = folio_index(folio);
from = pos - index * PAGE_SIZE;
to = from + len;
@@ -59,14 +59,14 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
/* See if this page is already partially written in a way that we can
* merge the new write with.
*/
- if (PagePrivate(page)) {
- priv = page_private(page);
- f = afs_page_dirty_from(page, priv);
- t = afs_page_dirty_to(page, priv);
+ if (folio_test_private(folio)) {
+ priv = (unsigned long)folio_get_private(folio);
+ f = afs_folio_dirty_from(folio, priv);
+ t = afs_folio_dirty_to(folio, priv);
ASSERTCMP(f, <=, t);
- if (PageWriteback(page)) {
- trace_afs_page_dirty(vnode, tracepoint_string("alrdy"), page);
+ if (folio_test_writeback(folio)) {
+ trace_afs_folio_dirty(vnode, tracepoint_string("alrdy"), folio);
goto flush_conflicting_write;
}
/* If the file is being filled locally, allow inter-write
@@ -78,7 +78,7 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
goto flush_conflicting_write;
}
- *_page = page;
+ *_page = &folio->page;
_leave(" = 0");
return 0;
@@ -87,17 +87,17 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
*/
flush_conflicting_write:
_debug("flush conflict");
- ret = write_one_page(page);
+ ret = folio_write_one(folio);
if (ret < 0)
goto error;
- ret = lock_page_killable(page);
+ ret = folio_lock_killable(folio);
if (ret < 0)
goto error;
goto try_again;
error:
- put_page(page);
+ folio_put(folio);
_leave(" = %d", ret);
return ret;
}
@@ -109,14 +109,15 @@ int afs_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
{
+ struct folio *folio = page_folio(page);
struct afs_vnode *vnode = AFS_FS_I(file_inode(file));
unsigned long priv;
- unsigned int f, from = pos & (thp_size(page) - 1);
+ unsigned int f, from = pos & (folio_size(folio) - 1);
unsigned int t, to = from + copied;
loff_t i_size, maybe_i_size;
_enter("{%llx:%llu},{%lx}",
- vnode->fid.vid, vnode->fid.vnode, page->index);
+ vnode->fid.vid, vnode->fid.vnode, folio_index(folio));
if (!PageUptodate(page)) {
if (copied < len) {
@@ -141,29 +142,29 @@ int afs_write_end(struct file *file, struct address_space *mapping,
write_sequnlock(&vnode->cb_lock);
}
- if (PagePrivate(page)) {
- priv = page_private(page);
- f = afs_page_dirty_from(page, priv);
- t = afs_page_dirty_to(page, priv);
+ if (folio_test_private(folio)) {
+ priv = (unsigned long)folio_get_private(folio);
+ f = afs_folio_dirty_from(folio, priv);
+ t = afs_folio_dirty_to(folio, priv);
if (from < f)
f = from;
if (to > t)
t = to;
- priv = afs_page_dirty(page, f, t);
- set_page_private(page, priv);
- trace_afs_page_dirty(vnode, tracepoint_string("dirty+"), page);
+ priv = afs_folio_dirty(folio, f, t);
+ folio_change_private(folio, (void *)priv);
+ trace_afs_folio_dirty(vnode, tracepoint_string("dirty+"), folio);
} else {
- priv = afs_page_dirty(page, from, to);
- attach_page_private(page, (void *)priv);
- trace_afs_page_dirty(vnode, tracepoint_string("dirty"), page);
+ priv = afs_folio_dirty(folio, from, to);
+ folio_attach_private(folio, (void *)priv);
+ trace_afs_folio_dirty(vnode, tracepoint_string("dirty"), folio);
}
- if (set_page_dirty(page))
- _debug("dirtied %lx", page->index);
+ if (folio_mark_dirty(folio))
+ _debug("dirtied %lx", folio_index(folio));
out:
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
return copied;
}
@@ -174,40 +175,32 @@ static void afs_kill_pages(struct address_space *mapping,
loff_t start, loff_t len)
{
struct afs_vnode *vnode = AFS_FS_I(mapping->host);
- struct pagevec pv;
- unsigned int loop, psize;
+ struct folio *folio;
+ pgoff_t index = start / PAGE_SIZE;
+ pgoff_t last = (start + len - 1) / PAGE_SIZE, next;
_enter("{%llx:%llu},%llx @%llx",
vnode->fid.vid, vnode->fid.vnode, len, start);
- pagevec_init(&pv);
-
do {
- _debug("kill %llx @%llx", len, start);
-
- pv.nr = find_get_pages_contig(mapping, start / PAGE_SIZE,
- PAGEVEC_SIZE, pv.pages);
- if (pv.nr == 0)
- break;
+ _debug("kill %lx (to %lx)", index, last);
- for (loop = 0; loop < pv.nr; loop++) {
- struct page *page = pv.pages[loop];
+ folio = filemap_get_folio(mapping, index);
+ if (!folio) {
+ next = index + 1;
+ continue;
+ }
- if (page->index * PAGE_SIZE >= start + len)
- break;
+ next = folio_next_index(folio);
- psize = thp_size(page);
- start += psize;
- len -= psize;
- ClearPageUptodate(page);
- end_page_writeback(page);
- lock_page(page);
- generic_error_remove_page(mapping, page);
- unlock_page(page);
- }
+ folio_clear_uptodate(folio);
+ folio_end_writeback(folio);
+ folio_lock(folio);
+ generic_error_remove_page(mapping, &folio->page);
+ folio_unlock(folio);
+ folio_put(folio);
- __pagevec_release(&pv);
- } while (len > 0);
+ } while (index = next, index <= last);
_leave("");
}
@@ -220,37 +213,26 @@ static void afs_redirty_pages(struct writeback_control *wbc,
loff_t start, loff_t len)
{
struct afs_vnode *vnode = AFS_FS_I(mapping->host);
- struct pagevec pv;
- unsigned int loop, psize;
+ struct folio *folio;
+ pgoff_t index = start / PAGE_SIZE;
+ pgoff_t last = (start + len - 1) / PAGE_SIZE, next;
_enter("{%llx:%llu},%llx @%llx",
vnode->fid.vid, vnode->fid.vnode, len, start);
- pagevec_init(&pv);
-
do {
_debug("redirty %llx @%llx", len, start);
- pv.nr = find_get_pages_contig(mapping, start / PAGE_SIZE,
- PAGEVEC_SIZE, pv.pages);
- if (pv.nr == 0)
- break;
-
- for (loop = 0; loop < pv.nr; loop++) {
- struct page *page = pv.pages[loop];
-
- if (page->index * PAGE_SIZE >= start + len)
- break;
-
- psize = thp_size(page);
- start += psize;
- len -= psize;
- redirty_page_for_writepage(wbc, page);
- end_page_writeback(page);
+ folio = filemap_get_folio(mapping, index);
+ if (!folio) {
+ next = index + 1;
+ continue;
}
- __pagevec_release(&pv);
- } while (len > 0);
+ folio_redirty_for_writepage(wbc, folio);
+ folio_end_writeback(folio);
+ folio_put(folio);
+ } while (index = next, index <= last);
_leave("");
}
@@ -261,7 +243,7 @@ static void afs_redirty_pages(struct writeback_control *wbc,
static void afs_pages_written_back(struct afs_vnode *vnode, loff_t start, unsigned int len)
{
struct address_space *mapping = vnode->vfs_inode.i_mapping;
- struct page *page;
+ struct folio *folio;
pgoff_t end;
XA_STATE(xas, &mapping->i_pages, start / PAGE_SIZE);
@@ -272,15 +254,16 @@ static void afs_pages_written_back(struct afs_vnode *vnode, loff_t start, unsign
rcu_read_lock();
end = (start + len - 1) / PAGE_SIZE;
- xas_for_each(&xas, page, end) {
- if (!PageWriteback(page)) {
- kdebug("bad %x @%llx page %lx %lx", len, start, page->index, end);
- ASSERT(PageWriteback(page));
+ xas_for_each(&xas, folio, end) {
+ if (!folio_test_writeback(folio)) {
+ kdebug("bad %x @%llx page %lx %lx",
+ len, start, folio_index(folio), end);
+ ASSERT(folio_test_writeback(folio));
}
- trace_afs_page_dirty(vnode, tracepoint_string("clear"), page);
- detach_page_private(page);
- page_endio(page, true, 0);
+ trace_afs_folio_dirty(vnode, tracepoint_string("clear"), folio);
+ folio_detach_private(folio);
+ page_endio(&folio->page, true, 0);
}
rcu_read_unlock();
@@ -437,7 +420,7 @@ static void afs_extend_writeback(struct address_space *mapping,
unsigned int *_len)
{
struct pagevec pvec;
- struct page *page;
+ struct folio *folio;
unsigned long priv;
unsigned int psize, filler = 0;
unsigned int f, t;
@@ -456,37 +439,37 @@ static void afs_extend_writeback(struct address_space *mapping,
*/
rcu_read_lock();
- xas_for_each(&xas, page, ULONG_MAX) {
+ xas_for_each(&xas, folio, ULONG_MAX) {
stop = true;
- if (xas_retry(&xas, page))
+ if (xas_retry(&xas, folio))
continue;
- if (xa_is_value(page))
+ if (xa_is_value(folio))
break;
- if (page->index != index)
+ if (folio_index(folio) != index)
break;
- if (!page_cache_get_speculative(page)) {
+ if (!folio_try_get_rcu(folio)) {
xas_reset(&xas);
continue;
}
/* Has the page moved or been split? */
- if (unlikely(page != xas_reload(&xas)))
+ if (unlikely(folio != xas_reload(&xas)))
break;
- if (!trylock_page(page))
+ if (!folio_trylock(folio))
break;
- if (!PageDirty(page) || PageWriteback(page)) {
- unlock_page(page);
+ if (!folio_test_dirty(folio) || folio_test_writeback(folio)) {
+ folio_unlock(folio);
break;
}
- psize = thp_size(page);
- priv = page_private(page);
- f = afs_page_dirty_from(page, priv);
- t = afs_page_dirty_to(page, priv);
+ psize = folio_size(folio);
+ priv = (unsigned long)folio_get_private(folio);
+ f = afs_folio_dirty_from(folio, priv);
+ t = afs_folio_dirty_to(folio, priv);
if (f != 0 && !new_content) {
- unlock_page(page);
+ folio_unlock(folio);
break;
}
@@ -497,8 +480,8 @@ static void afs_extend_writeback(struct address_space *mapping,
else if (t == psize || new_content)
stop = false;
- index += thp_nr_pages(page);
- if (!pagevec_add(&pvec, page))
+ index += folio_nr_pages(folio);
+ if (!pagevec_add(&pvec, &folio->page))
break;
if (stop)
break;
@@ -515,16 +498,16 @@ static void afs_extend_writeback(struct address_space *mapping,
break;
for (i = 0; i < pagevec_count(&pvec); i++) {
- page = pvec.pages[i];
- trace_afs_page_dirty(vnode, tracepoint_string("store+"), page);
+ folio = page_folio(pvec.pages[i]);
+ trace_afs_folio_dirty(vnode, tracepoint_string("store+"), folio);
- if (!clear_page_dirty_for_io(page))
+ if (!folio_clear_dirty_for_io(folio))
BUG();
- if (test_set_page_writeback(page))
+ if (folio_start_writeback(folio))
BUG();
- *_count -= thp_nr_pages(page);
- unlock_page(page);
+ *_count -= folio_nr_pages(folio);
+ folio_unlock(folio);
}
pagevec_release(&pvec);
@@ -538,10 +521,10 @@ static void afs_extend_writeback(struct address_space *mapping,
* Synchronously write back the locked page and any subsequent non-locked dirty
* pages.
*/
-static ssize_t afs_write_back_from_locked_page(struct address_space *mapping,
- struct writeback_control *wbc,
- struct page *page,
- loff_t start, loff_t end)
+static ssize_t afs_write_back_from_locked_folio(struct address_space *mapping,
+ struct writeback_control *wbc,
+ struct folio *folio,
+ loff_t start, loff_t end)
{
struct afs_vnode *vnode = AFS_FS_I(mapping->host);
struct iov_iter iter;
@@ -552,22 +535,22 @@ static ssize_t afs_write_back_from_locked_page(struct address_space *mapping,
long count = wbc->nr_to_write;
int ret;
- _enter(",%lx,%llx-%llx", page->index, start, end);
+ _enter(",%lx,%llx-%llx", folio_index(folio), start, end);
- if (test_set_page_writeback(page))
+ if (folio_start_writeback(folio))
BUG();
- count -= thp_nr_pages(page);
+ count -= folio_nr_pages(folio);
/* Find all consecutive lockable dirty pages that have contiguous
* written regions, stopping when we find a page that is not
* immediately lockable, is not dirty or is missing, or we reach the
* end of the range.
*/
- priv = page_private(page);
- offset = afs_page_dirty_from(page, priv);
- to = afs_page_dirty_to(page, priv);
- trace_afs_page_dirty(vnode, tracepoint_string("store"), page);
+ priv = (unsigned long)folio_get_private(folio);
+ offset = afs_folio_dirty_from(folio, priv);
+ to = afs_folio_dirty_to(folio, priv);
+ trace_afs_folio_dirty(vnode, tracepoint_string("store"), folio);
len = to - offset;
start += offset;
@@ -580,7 +563,7 @@ static ssize_t afs_write_back_from_locked_page(struct address_space *mapping,
max_len = min_t(unsigned long long, max_len, i_size - start);
if (len < max_len &&
- (to == thp_size(page) || new_content))
+ (to == folio_size(folio) || new_content))
afs_extend_writeback(mapping, vnode, &count,
start, max_len, new_content, &len);
len = min_t(loff_t, len, max_len);
@@ -590,7 +573,7 @@ static ssize_t afs_write_back_from_locked_page(struct address_space *mapping,
* set; the first page is still locked at this point, but all the rest
* have been unlocked.
*/
- unlock_page(page);
+ folio_unlock(folio);
if (start < i_size) {
_debug("write back %x @%llx [%llx]", len, start, i_size);
@@ -651,16 +634,17 @@ static ssize_t afs_write_back_from_locked_page(struct address_space *mapping,
* write a page back to the server
* - the caller locked the page for us
*/
-int afs_writepage(struct page *page, struct writeback_control *wbc)
+int afs_writepage(struct page *subpage, struct writeback_control *wbc)
{
+ struct folio *folio = page_folio(subpage);
ssize_t ret;
loff_t start;
- _enter("{%lx},", page->index);
+ _enter("{%lx},", folio_index(folio));
- start = page->index * PAGE_SIZE;
- ret = afs_write_back_from_locked_page(page->mapping, wbc, page,
- start, LLONG_MAX - start);
+ start = folio_index(folio) * PAGE_SIZE;
+ ret = afs_write_back_from_locked_folio(folio_file_mapping(folio), wbc,
+ folio, start, LLONG_MAX - start);
if (ret < 0) {
_leave(" = %zd", ret);
return ret;
@@ -677,7 +661,8 @@ static int afs_writepages_region(struct address_space *mapping,
struct writeback_control *wbc,
loff_t start, loff_t end, loff_t *_next)
{
- struct page *page;
+ struct folio *folio;
+ struct page *head_page;
ssize_t ret;
int n;
@@ -687,13 +672,14 @@ static int afs_writepages_region(struct address_space *mapping,
pgoff_t index = start / PAGE_SIZE;
n = find_get_pages_range_tag(mapping, &index, end / PAGE_SIZE,
- PAGECACHE_TAG_DIRTY, 1, &page);
+ PAGECACHE_TAG_DIRTY, 1, &head_page);
if (!n)
break;
- start = (loff_t)page->index * PAGE_SIZE; /* May regress with THPs */
+ folio = page_folio(head_page);
+ start = folio_file_pos(folio); /* May regress with THPs */
- _debug("wback %lx", page->index);
+ _debug("wback %lx", folio_index(folio));
/* At this point we hold neither the i_pages lock nor the
* page lock: the page may be truncated or invalidated
@@ -701,37 +687,38 @@ static int afs_writepages_region(struct address_space *mapping,
* back from swapper_space to tmpfs file mapping
*/
if (wbc->sync_mode != WB_SYNC_NONE) {
- ret = lock_page_killable(page);
+ ret = folio_lock_killable(folio);
if (ret < 0) {
- put_page(page);
+ folio_put(folio);
return ret;
}
} else {
- if (!trylock_page(page)) {
- put_page(page);
+ if (!folio_trylock(folio)) {
+ folio_put(folio);
return 0;
}
}
- if (page->mapping != mapping || !PageDirty(page)) {
- start += thp_size(page);
- unlock_page(page);
- put_page(page);
+ if (folio_file_mapping(folio) != mapping ||
+ !folio_test_dirty(folio)) {
+ start += folio_size(folio);
+ folio_unlock(folio);
+ folio_put(folio);
continue;
}
- if (PageWriteback(page)) {
- unlock_page(page);
+ if (folio_test_writeback(folio)) {
+ folio_unlock(folio);
if (wbc->sync_mode != WB_SYNC_NONE)
- wait_on_page_writeback(page);
- put_page(page);
+ folio_wait_writeback(folio);
+ folio_put(folio);
continue;
}
- if (!clear_page_dirty_for_io(page))
+ if (!folio_clear_dirty_for_io(folio))
BUG();
- ret = afs_write_back_from_locked_page(mapping, wbc, page, start, end);
- put_page(page);
+ ret = afs_write_back_from_locked_folio(mapping, wbc, folio, start, end);
+ folio_put(folio);
if (ret < 0) {
_leave(" = %zd", ret);
return ret;
@@ -840,14 +827,13 @@ int afs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
vm_fault_t afs_page_mkwrite(struct vm_fault *vmf)
{
struct folio *folio = page_folio(vmf->page);
- struct page *page = &folio->page;
struct file *file = vmf->vma->vm_file;
struct inode *inode = file_inode(file);
struct afs_vnode *vnode = AFS_FS_I(inode);
unsigned long priv;
vm_fault_t ret = VM_FAULT_RETRY;
- _enter("{{%llx:%llu}},{%lx}", vnode->fid.vid, vnode->fid.vnode, page->index);
+ _enter("{{%llx:%llu}},{%lx}", vnode->fid.vid, vnode->fid.vnode, folio_index(folio));
sb_start_pagefault(inode->i_sb);
@@ -855,18 +841,18 @@ vm_fault_t afs_page_mkwrite(struct vm_fault *vmf)
* be modified. We then assume the entire page will need writing back.
*/
#ifdef CONFIG_AFS_FSCACHE
- if (PageFsCache(page) &&
- wait_on_page_fscache_killable(page) < 0)
+ if (folio_test_fscache(folio) &&
+ folio_wait_fscache_killable(folio) < 0)
goto out;
#endif
if (folio_wait_writeback_killable(folio))
goto out;
- if (lock_page_killable(page) < 0)
+ if (folio_lock_killable(folio) < 0)
goto out;
- /* We mustn't change page->private until writeback is complete as that
+ /* We mustn't change folio->private until writeback is complete as that
* details the portion of the page we need to write back and we might
* need to redirty the page if there's a problem.
*/
@@ -875,14 +861,14 @@ vm_fault_t afs_page_mkwrite(struct vm_fault *vmf)
goto out;
}
- priv = afs_page_dirty(page, 0, thp_size(page));
- priv = afs_page_dirty_mmapped(priv);
- if (PagePrivate(page)) {
- set_page_private(page, priv);
- trace_afs_page_dirty(vnode, tracepoint_string("mkwrite+"), page);
+ priv = afs_folio_dirty(folio, 0, folio_size(folio));
+ priv = afs_folio_dirty_mmapped(priv);
+ if (folio_test_private(folio)) {
+ folio_change_private(folio, (void *)priv);
+ trace_afs_folio_dirty(vnode, tracepoint_string("mkwrite+"), folio);
} else {
- attach_page_private(page, (void *)priv);
- trace_afs_page_dirty(vnode, tracepoint_string("mkwrite"), page);
+ folio_attach_private(folio, (void *)priv);
+ trace_afs_folio_dirty(vnode, tracepoint_string("mkwrite"), folio);
}
file_update_time(file);
@@ -923,39 +909,38 @@ void afs_prune_wb_keys(struct afs_vnode *vnode)
/*
* Clean up a page during invalidation.
*/
-int afs_launder_page(struct page *page)
+int afs_launder_page(struct page *subpage)
{
- struct address_space *mapping = page->mapping;
- struct afs_vnode *vnode = AFS_FS_I(mapping->host);
+ struct folio *folio = page_folio(subpage);
+ struct afs_vnode *vnode = AFS_FS_I(folio_inode(folio));
struct iov_iter iter;
struct bio_vec bv[1];
unsigned long priv;
unsigned int f, t;
int ret = 0;
- _enter("{%lx}", page->index);
+ _enter("{%lx}", folio_index(folio));
- priv = page_private(page);
- if (clear_page_dirty_for_io(page)) {
+ priv = (unsigned long)folio_get_private(folio);
+ if (folio_clear_dirty_for_io(folio)) {
f = 0;
- t = thp_size(page);
- if (PagePrivate(page)) {
- f = afs_page_dirty_from(page, priv);
- t = afs_page_dirty_to(page, priv);
+ t = folio_size(folio);
+ if (folio_test_private(folio)) {
+ f = afs_folio_dirty_from(folio, priv);
+ t = afs_folio_dirty_to(folio, priv);
}
- bv[0].bv_page = page;
+ bv[0].bv_page = &folio->page;
bv[0].bv_offset = f;
bv[0].bv_len = t - f;
iov_iter_bvec(&iter, WRITE, bv, 1, bv[0].bv_len);
- trace_afs_page_dirty(vnode, tracepoint_string("launder"), page);
- ret = afs_store_data(vnode, &iter,
- (loff_t)page->index * PAGE_SIZE + f, true);
+ trace_afs_folio_dirty(vnode, tracepoint_string("launder"), folio);
+ ret = afs_store_data(vnode, &iter, folio_pos(folio) + f, true);
}
- trace_afs_page_dirty(vnode, tracepoint_string("laundered"), page);
- detach_page_private(page);
- wait_on_page_fscache(page);
+ trace_afs_folio_dirty(vnode, tracepoint_string("laundered"), folio);
+ folio_detach_private(folio);
+ folio_wait_fscache(folio);
return ret;
}
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index a1e2813731d1..49aa41555baf 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -63,7 +63,7 @@
(CONGESTION_ON_THRESH(congestion_kb) >> 2))
static int ceph_netfs_check_write_begin(struct file *file, loff_t pos, unsigned int len,
- struct page *page, void **_fsdata);
+ struct folio *folio, void **_fsdata);
static inline struct ceph_snap_context *page_snap_context(struct page *page)
{
@@ -317,13 +317,14 @@ static const struct netfs_read_request_ops ceph_netfs_read_ops = {
};
/* read a single page, without unlocking it. */
-static int ceph_readpage(struct file *file, struct page *page)
+static int ceph_readpage(struct file *file, struct page *subpage)
{
+ struct folio *folio = page_folio(subpage);
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_vino vino = ceph_vino(inode);
- u64 off = page_offset(page);
- u64 len = thp_size(page);
+ size_t len = folio_size(folio);
+ u64 off = folio_file_pos(folio);
if (ci->i_inline_version != CEPH_INLINE_NONE) {
/*
@@ -331,19 +332,19 @@ static int ceph_readpage(struct file *file, struct page *page)
* into page cache while getting Fcr caps.
*/
if (off == 0) {
- unlock_page(page);
+ folio_unlock(folio);
return -EINVAL;
}
- zero_user_segment(page, 0, thp_size(page));
- SetPageUptodate(page);
- unlock_page(page);
+ zero_user_segment(&folio->page, 0, folio_size(folio));
+ folio_mark_uptodate(folio);
+ folio_unlock(folio);
return 0;
}
- dout("readpage ino %llx.%llx file %p off %llu len %llu page %p index %lu\n",
- vino.ino, vino.snap, file, off, len, page, page->index);
+ dout("readpage ino %llx.%llx file %p off %llu len %zu folio %p index %lu\n",
+ vino.ino, vino.snap, file, off, len, folio, folio_index(folio));
- return netfs_readpage(file, page, &ceph_netfs_read_ops, NULL);
+ return netfs_readpage(file, folio, &ceph_netfs_read_ops, NULL);
}
static void ceph_readahead(struct readahead_control *ractl)
@@ -1187,18 +1188,18 @@ ceph_find_incompatible(struct page *page)
}
static int ceph_netfs_check_write_begin(struct file *file, loff_t pos, unsigned int len,
- struct page *page, void **_fsdata)
+ struct folio *folio, void **_fsdata)
{
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_snap_context *snapc;
- snapc = ceph_find_incompatible(page);
+ snapc = ceph_find_incompatible(folio_page(folio, 0));
if (snapc) {
int r;
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
if (IS_ERR(snapc))
return PTR_ERR(snapc);
@@ -1216,12 +1217,12 @@ static int ceph_netfs_check_write_begin(struct file *file, loff_t pos, unsigned
* clean, or already dirty within the same snap context.
*/
static int ceph_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
+ loff_t pos, unsigned len, unsigned aop_flags,
struct page **pagep, void **fsdata)
{
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
- struct page *page = NULL;
+ struct folio *folio = NULL;
pgoff_t index = pos >> PAGE_SHIFT;
int r;
@@ -1230,39 +1231,43 @@ static int ceph_write_begin(struct file *file, struct address_space *mapping,
* for inline_version sent to the MDS.
*/
if (ci->i_inline_version != CEPH_INLINE_NONE) {
- page = grab_cache_page_write_begin(mapping, index, flags);
- if (!page)
+ unsigned int fgp_flags = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE;
+ if (aop_flags & AOP_FLAG_NOFS)
+ fgp_flags |= FGP_NOFS;
+ folio = __filemap_get_folio(mapping, index, fgp_flags,
+ mapping_gfp_mask(mapping));
+ if (!folio)
return -ENOMEM;
/*
* The inline_version on a new inode is set to 1. If that's the
- * case, then the page is brand new and isn't yet Uptodate.
+ * case, then the folio is brand new and isn't yet Uptodate.
*/
r = 0;
if (index == 0 && ci->i_inline_version != 1) {
- if (!PageUptodate(page)) {
+ if (!folio_test_uptodate(folio)) {
WARN_ONCE(1, "ceph: write_begin called on still-inlined inode (inline_version %llu)!\n",
ci->i_inline_version);
r = -EINVAL;
}
goto out;
}
- zero_user_segment(page, 0, thp_size(page));
- SetPageUptodate(page);
+ zero_user_segment(&folio->page, 0, folio_size(folio));
+ folio_mark_uptodate(folio);
goto out;
}
- r = netfs_write_begin(file, inode->i_mapping, pos, len, 0, &page, NULL,
+ r = netfs_write_begin(file, inode->i_mapping, pos, len, 0, &folio, NULL,
&ceph_netfs_read_ops, NULL);
out:
if (r == 0)
- wait_on_page_fscache(page);
+ folio_wait_fscache(folio);
if (r < 0) {
- if (page)
- put_page(page);
+ if (folio)
+ folio_put(folio);
} else {
- WARN_ON_ONCE(!PageLocked(page));
- *pagep = page;
+ WARN_ON_ONCE(!folio_test_locked(folio));
+ *pagep = &folio->page;
}
return r;
}
@@ -1273,32 +1278,33 @@ static int ceph_write_begin(struct file *file, struct address_space *mapping,
*/
static int ceph_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
- struct page *page, void *fsdata)
+ struct page *subpage, void *fsdata)
{
+ struct folio *folio = page_folio(subpage);
struct inode *inode = file_inode(file);
bool check_cap = false;
- dout("write_end file %p inode %p page %p %d~%d (%d)\n", file,
- inode, page, (int)pos, (int)copied, (int)len);
+ dout("write_end file %p inode %p folio %p %d~%d (%d)\n", file,
+ inode, folio, (int)pos, (int)copied, (int)len);
/* zero the stale part of the page if we did a short copy */
- if (!PageUptodate(page)) {
+ if (!folio_test_uptodate(folio)) {
if (copied < len) {
copied = 0;
goto out;
}
- SetPageUptodate(page);
+ folio_mark_uptodate(folio);
}
/* did file size increase? */
if (pos+copied > i_size_read(inode))
check_cap = ceph_inode_set_size(inode, pos+copied);
- set_page_dirty(page);
+ folio_mark_dirty(folio);
out:
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
if (check_cap)
ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY, NULL);
diff --git a/fs/netfs/read_helper.c b/fs/netfs/read_helper.c
index 0b6cd3b8734c..2ad91f9e2a45 100644
--- a/fs/netfs/read_helper.c
+++ b/fs/netfs/read_helper.c
@@ -230,7 +230,7 @@ static void netfs_rreq_completed(struct netfs_read_request *rreq, bool was_async
/*
* Deal with the completion of writing the data to the cache. We have to clear
- * the PG_fscache bits on the pages involved and release the caller's ref.
+ * the PG_fscache bits on the folios involved and release the caller's ref.
*
* May be called in softirq mode and we inherit a ref from the caller.
*/
@@ -238,7 +238,7 @@ static void netfs_rreq_unmark_after_write(struct netfs_read_request *rreq,
bool was_async)
{
struct netfs_read_subrequest *subreq;
- struct page *page;
+ struct folio *folio;
pgoff_t unlocked = 0;
bool have_unlocked = false;
@@ -247,14 +247,14 @@ static void netfs_rreq_unmark_after_write(struct netfs_read_request *rreq,
list_for_each_entry(subreq, &rreq->subrequests, rreq_link) {
XA_STATE(xas, &rreq->mapping->i_pages, subreq->start / PAGE_SIZE);
- xas_for_each(&xas, page, (subreq->start + subreq->len - 1) / PAGE_SIZE) {
+ xas_for_each(&xas, folio, (subreq->start + subreq->len - 1) / PAGE_SIZE) {
/* We might have multiple writes from the same huge
- * page, but we mustn't unlock a page more than once.
+ * folio, but we mustn't unlock a folio more than once.
*/
- if (have_unlocked && page->index <= unlocked)
+ if (have_unlocked && folio_index(folio) <= unlocked)
continue;
- unlocked = page->index;
- end_page_fscache(page);
+ unlocked = folio_index(folio);
+ folio_end_fscache(folio);
have_unlocked = true;
}
}
@@ -367,18 +367,17 @@ static void netfs_rreq_write_to_cache(struct netfs_read_request *rreq,
}
/*
- * Unlock the pages in a read operation. We need to set PG_fscache on any
- * pages we're going to write back before we unlock them.
+ * Unlock the folios in a read operation. We need to set PG_fscache on any
+ * folios we're going to write back before we unlock them.
*/
static void netfs_rreq_unlock(struct netfs_read_request *rreq)
{
struct netfs_read_subrequest *subreq;
- struct page *page;
+ struct folio *folio;
unsigned int iopos, account = 0;
pgoff_t start_page = rreq->start / PAGE_SIZE;
pgoff_t last_page = ((rreq->start + rreq->len) / PAGE_SIZE) - 1;
bool subreq_failed = false;
- int i;
XA_STATE(xas, &rreq->mapping->i_pages, start_page);
@@ -403,9 +402,9 @@ static void netfs_rreq_unlock(struct netfs_read_request *rreq)
trace_netfs_rreq(rreq, netfs_rreq_trace_unlock);
rcu_read_lock();
- xas_for_each(&xas, page, last_page) {
- unsigned int pgpos = (page->index - start_page) * PAGE_SIZE;
- unsigned int pgend = pgpos + thp_size(page);
+ xas_for_each(&xas, folio, last_page) {
+ unsigned int pgpos = (folio_index(folio) - start_page) * PAGE_SIZE;
+ unsigned int pgend = pgpos + folio_size(folio);
bool pg_failed = false;
for (;;) {
@@ -414,7 +413,7 @@ static void netfs_rreq_unlock(struct netfs_read_request *rreq)
break;
}
if (test_bit(NETFS_SREQ_WRITE_TO_CACHE, &subreq->flags))
- set_page_fscache(page);
+ folio_start_fscache(folio);
pg_failed |= subreq_failed;
if (pgend < iopos + subreq->len)
break;
@@ -433,17 +432,16 @@ static void netfs_rreq_unlock(struct netfs_read_request *rreq)
}
if (!pg_failed) {
- for (i = 0; i < thp_nr_pages(page); i++)
- flush_dcache_page(page);
- SetPageUptodate(page);
+ flush_dcache_folio(folio);
+ folio_mark_uptodate(folio);
}
- if (!test_bit(NETFS_RREQ_DONT_UNLOCK_PAGES, &rreq->flags)) {
- if (page->index == rreq->no_unlock_page &&
- test_bit(NETFS_RREQ_NO_UNLOCK_PAGE, &rreq->flags))
+ if (!test_bit(NETFS_RREQ_DONT_UNLOCK_FOLIOS, &rreq->flags)) {
+ if (folio_index(folio) == rreq->no_unlock_folio &&
+ test_bit(NETFS_RREQ_NO_UNLOCK_FOLIO, &rreq->flags))
_debug("no unlock");
else
- unlock_page(page);
+ folio_unlock(folio);
}
}
rcu_read_unlock();
@@ -876,7 +874,6 @@ void netfs_readahead(struct readahead_control *ractl,
void *netfs_priv)
{
struct netfs_read_request *rreq;
- struct page *page;
unsigned int debug_index = 0;
int ret;
@@ -911,11 +908,11 @@ void netfs_readahead(struct readahead_control *ractl,
} while (rreq->submitted < rreq->len);
- /* Drop the refs on the pages here rather than in the cache or
+ /* Drop the refs on the folios here rather than in the cache or
* filesystem. The locks will be dropped in netfs_rreq_unlock().
*/
- while ((page = readahead_page(ractl)))
- put_page(page);
+ while (readahead_folio(ractl))
+ ;
/* If we decrement nr_rd_ops to 0, the ref belongs to us. */
if (atomic_dec_and_test(&rreq->nr_rd_ops))
@@ -935,7 +932,7 @@ EXPORT_SYMBOL(netfs_readahead);
/**
* netfs_readpage - Helper to manage a readpage request
* @file: The file to read from
- * @page: The page to read
+ * @folio: The folio to read
* @ops: The network filesystem's operations for the helper to use
* @netfs_priv: Private netfs data to be retained in the request
*
@@ -950,7 +947,7 @@ EXPORT_SYMBOL(netfs_readahead);
* This is usable whether or not caching is enabled.
*/
int netfs_readpage(struct file *file,
- struct page *page,
+ struct folio *folio,
const struct netfs_read_request_ops *ops,
void *netfs_priv)
{
@@ -958,23 +955,23 @@ int netfs_readpage(struct file *file,
unsigned int debug_index = 0;
int ret;
- _enter("%lx", page_index(page));
+ _enter("%lx", folio_index(folio));
rreq = netfs_alloc_read_request(ops, netfs_priv, file);
if (!rreq) {
if (netfs_priv)
- ops->cleanup(netfs_priv, page_file_mapping(page));
- unlock_page(page);
+ ops->cleanup(netfs_priv, folio_file_mapping(folio));
+ folio_unlock(folio);
return -ENOMEM;
}
- rreq->mapping = page_file_mapping(page);
- rreq->start = page_file_offset(page);
- rreq->len = thp_size(page);
+ rreq->mapping = folio_file_mapping(folio);
+ rreq->start = folio_file_pos(folio);
+ rreq->len = folio_size(folio);
if (ops->begin_cache_operation) {
ret = ops->begin_cache_operation(rreq);
if (ret == -ENOMEM || ret == -EINTR || ret == -ERESTARTSYS) {
- unlock_page(page);
+ folio_unlock(folio);
goto out;
}
}
@@ -1012,40 +1009,40 @@ int netfs_readpage(struct file *file,
EXPORT_SYMBOL(netfs_readpage);
/**
- * netfs_skip_page_read - prep a page for writing without reading first
- * @page: page being prepared
+ * netfs_skip_folio_read - prep a folio for writing without reading first
+ * @folio: The folio being prepared
* @pos: starting position for the write
* @len: length of write
*
* In some cases, write_begin doesn't need to read at all:
- * - full page write
- * - write that lies in a page that is completely beyond EOF
- * - write that covers the the page from start to EOF or beyond it
+ * - full folio write
+ * - write that lies in a folio that is completely beyond EOF
+ * - write that covers the folio from start to EOF or beyond it
*
* If any of these criteria are met, then zero out the unwritten parts
- * of the page and return true. Otherwise, return false.
+ * of the folio and return true. Otherwise, return false.
*/
-static bool netfs_skip_page_read(struct page *page, loff_t pos, size_t len)
+static bool netfs_skip_folio_read(struct folio *folio, loff_t pos, size_t len)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = folio_inode(folio);
loff_t i_size = i_size_read(inode);
- size_t offset = offset_in_thp(page, pos);
+ size_t offset = offset_in_folio(folio, pos);
- /* Full page write */
- if (offset == 0 && len >= thp_size(page))
+ /* Full folio write */
+ if (offset == 0 && len >= folio_size(folio))
return true;
- /* pos beyond last page in the file */
+ /* pos beyond last folio in the file */
if (pos - offset >= i_size)
goto zero_out;
- /* Write that covers from the start of the page to EOF or beyond */
+ /* Write that covers from the start of the folio to EOF or beyond */
if (offset == 0 && (pos + len) >= i_size)
goto zero_out;
return false;
zero_out:
- zero_user_segments(page, 0, offset, offset + len, thp_size(page));
+ zero_user_segments(&folio->page, 0, offset, offset + len, folio_size(folio));
return true;
}
@@ -1054,9 +1051,9 @@ static bool netfs_skip_page_read(struct page *page, loff_t pos, size_t len)
* @file: The file to read from
* @mapping: The mapping to read from
* @pos: File position at which the write will begin
- * @len: The length of the write (may extend beyond the end of the page chosen)
- * @flags: AOP_* flags
- * @_page: Where to put the resultant page
+ * @len: The length of the write (may extend beyond the end of the folio chosen)
+ * @aop_flags: AOP_* flags
+ * @_folio: Where to put the resultant folio
* @_fsdata: Place for the netfs to store a cookie
* @ops: The network filesystem's operations for the helper to use
* @netfs_priv: Private netfs data to be retained in the request
@@ -1072,37 +1069,41 @@ static bool netfs_skip_page_read(struct page *page, loff_t pos, size_t len)
* issue_op, is mandatory.
*
* The check_write_begin() operation can be provided to check for and flush
- * conflicting writes once the page is grabbed and locked. It is passed a
+ * conflicting writes once the folio is grabbed and locked. It is passed a
* pointer to the fsdata cookie that gets returned to the VM to be passed to
* write_end. It is permitted to sleep. It should return 0 if the request
- * should go ahead; unlock the page and return -EAGAIN to cause the page to be
- * regot; or return an error.
+ * should go ahead; unlock the folio and return -EAGAIN to cause the folio to
+ * be regot; or return an error.
*
* This is usable whether or not caching is enabled.
*/
int netfs_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned int len, unsigned int flags,
- struct page **_page, void **_fsdata,
+ loff_t pos, unsigned int len, unsigned int aop_flags,
+ struct folio **_folio, void **_fsdata,
const struct netfs_read_request_ops *ops,
void *netfs_priv)
{
struct netfs_read_request *rreq;
- struct page *page, *xpage;
+ struct folio *folio;
struct inode *inode = file_inode(file);
- unsigned int debug_index = 0;
+ unsigned int debug_index = 0, fgp_flags;
pgoff_t index = pos >> PAGE_SHIFT;
int ret;
DEFINE_READAHEAD(ractl, file, NULL, mapping, index);
retry:
- page = grab_cache_page_write_begin(mapping, index, flags);
- if (!page)
+ fgp_flags = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE;
+ if (aop_flags & AOP_FLAG_NOFS)
+ fgp_flags |= FGP_NOFS;
+ folio = __filemap_get_folio(mapping, index, fgp_flags,
+ mapping_gfp_mask(mapping));
+ if (!folio)
return -ENOMEM;
if (ops->check_write_begin) {
/* Allow the netfs (eg. ceph) to flush conflicts. */
- ret = ops->check_write_begin(file, pos, len, page, _fsdata);
+ ret = ops->check_write_begin(file, pos, len, folio, _fsdata);
if (ret < 0) {
trace_netfs_failure(NULL, NULL, ret, netfs_fail_check_write_begin);
if (ret == -EAGAIN)
@@ -1111,28 +1112,28 @@ int netfs_write_begin(struct file *file, struct address_space *mapping,
}
}
- if (PageUptodate(page))
- goto have_page;
+ if (folio_test_uptodate(folio))
+ goto have_folio;
/* If the page is beyond the EOF, we want to clear it - unless it's
* within the cache granule containing the EOF, in which case we need
* to preload the granule.
*/
if (!ops->is_cache_enabled(inode) &&
- netfs_skip_page_read(page, pos, len)) {
+ netfs_skip_folio_read(folio, pos, len)) {
netfs_stat(&netfs_n_rh_write_zskip);
- goto have_page_no_wait;
+ goto have_folio_no_wait;
}
ret = -ENOMEM;
rreq = netfs_alloc_read_request(ops, netfs_priv, file);
if (!rreq)
goto error;
- rreq->mapping = page->mapping;
- rreq->start = page_offset(page);
- rreq->len = thp_size(page);
- rreq->no_unlock_page = page->index;
- __set_bit(NETFS_RREQ_NO_UNLOCK_PAGE, &rreq->flags);
+ rreq->mapping = folio_file_mapping(folio);
+ rreq->start = folio_file_pos(folio);
+ rreq->len = folio_size(folio);
+ rreq->no_unlock_folio = folio_index(folio);
+ __set_bit(NETFS_RREQ_NO_UNLOCK_FOLIO, &rreq->flags);
netfs_priv = NULL;
if (ops->begin_cache_operation) {
@@ -1147,14 +1148,14 @@ int netfs_write_begin(struct file *file, struct address_space *mapping,
/* Expand the request to meet caching requirements and download
* preferences.
*/
- ractl._nr_pages = thp_nr_pages(page);
+ ractl._nr_pages = folio_nr_pages(folio);
netfs_rreq_expand(rreq, &ractl);
netfs_get_read_request(rreq);
- /* We hold the page locks, so we can drop the references */
- while ((xpage = readahead_page(&ractl)))
- if (xpage != page)
- put_page(xpage);
+ /* We hold the folio locks, so we can drop the references */
+ folio_get(folio);
+ while (readahead_folio(&ractl))
+ ;
atomic_set(&rreq->nr_rd_ops, 1);
do {
@@ -1184,22 +1185,22 @@ int netfs_write_begin(struct file *file, struct address_space *mapping,
if (ret < 0)
goto error;
-have_page:
- ret = wait_on_page_fscache_killable(page);
+have_folio:
+ ret = folio_wait_fscache_killable(folio);
if (ret < 0)
goto error;
-have_page_no_wait:
+have_folio_no_wait:
if (netfs_priv)
ops->cleanup(netfs_priv, mapping);
- *_page = page;
+ *_folio = folio;
_leave(" = 0");
return 0;
error_put:
netfs_put_read_request(rreq, false);
error:
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
if (netfs_priv)
ops->cleanup(netfs_priv, mapping);
_leave(" = %d", ret);
diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 113b5fa9280c..cb2aee4258ac 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -166,13 +166,13 @@ struct netfs_read_request {
short error; /* 0 or error that occurred */
loff_t i_size; /* Size of the file */
loff_t start; /* Start position */
- pgoff_t no_unlock_page; /* Don't unlock this page after read */
+ pgoff_t no_unlock_folio; /* Don't unlock this folio after read */
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_NO_UNLOCK_PAGE 2 /* Don't unlock no_unlock_page on completion */
-#define NETFS_RREQ_DONT_UNLOCK_PAGES 3 /* Don't unlock the pages on completion */
+#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 */
#define NETFS_RREQ_IN_PROGRESS 5 /* Unlocked when the request completes */
const struct netfs_read_request_ops *netfs_ops;
@@ -190,7 +190,7 @@ struct netfs_read_request_ops {
void (*issue_op)(struct netfs_read_subrequest *subreq);
bool (*is_still_valid)(struct netfs_read_request *rreq);
int (*check_write_begin)(struct file *file, loff_t pos, unsigned len,
- struct page *page, void **_fsdata);
+ struct folio *folio, void **_fsdata);
void (*done)(struct netfs_read_request *rreq);
void (*cleanup)(struct address_space *mapping, void *netfs_priv);
};
@@ -240,11 +240,11 @@ extern void netfs_readahead(struct readahead_control *,
const struct netfs_read_request_ops *,
void *);
extern int netfs_readpage(struct file *,
- struct page *,
+ struct folio *,
const struct netfs_read_request_ops *,
void *);
extern int netfs_write_begin(struct file *, struct address_space *,
- loff_t, unsigned int, unsigned int, struct page **,
+ loff_t, unsigned int, unsigned int, struct folio **,
void **,
const struct netfs_read_request_ops *,
void *);
diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index 3ccf591b2374..d3d8abf3f8df 100644
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h
@@ -955,31 +955,32 @@ TRACE_EVENT(afs_dir_check_failed,
__entry->vnode, __entry->off, __entry->i_size)
);
-TRACE_EVENT(afs_page_dirty,
- TP_PROTO(struct afs_vnode *vnode, const char *where, struct page *page),
+TRACE_EVENT(afs_folio_dirty,
+ TP_PROTO(struct afs_vnode *vnode, const char *where, struct folio *folio),
- TP_ARGS(vnode, where, page),
+ TP_ARGS(vnode, where, folio),
TP_STRUCT__entry(
__field(struct afs_vnode *, vnode )
__field(const char *, where )
- __field(pgoff_t, page )
+ __field(pgoff_t, index )
__field(unsigned long, from )
__field(unsigned long, to )
),
TP_fast_assign(
+ unsigned long priv = (unsigned long)folio_get_private(folio);
__entry->vnode = vnode;
__entry->where = where;
- __entry->page = page->index;
- __entry->from = afs_page_dirty_from(page, page->private);
- __entry->to = afs_page_dirty_to(page, page->private);
- __entry->to |= (afs_is_page_dirty_mmapped(page->private) ?
- (1UL << (BITS_PER_LONG - 1)) : 0);
+ __entry->index = folio_index(folio);
+ __entry->from = afs_folio_dirty_from(folio, priv);
+ __entry->to = afs_folio_dirty_to(folio, priv);
+ __entry->to |= (afs_is_folio_dirty_mmapped(priv) ?
+ (1UL << (BITS_PER_LONG - 1)) : 0);
),
TP_printk("vn=%p %lx %s %lx-%lx%s",
- __entry->vnode, __entry->page, __entry->where,
+ __entry->vnode, __entry->index, __entry->where,
__entry->from,
__entry->to & ~(1UL << (BITS_PER_LONG - 1)),
__entry->to & (1UL << (BITS_PER_LONG - 1)) ? " M" : "")
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH 6/6] afs: Use folios in directory handling
2021-08-24 13:24 [PATCH 0/6] netfs, afs, ceph: Support folios, at least partially David Howells
` (4 preceding siblings ...)
2021-08-24 13:25 ` [PATCH 5/6] netfs, afs, ceph: Use folios David Howells
@ 2021-08-24 13:25 ` David Howells
5 siblings, 0 replies; 12+ messages in thread
From: David Howells @ 2021-08-24 13:25 UTC (permalink / raw)
To: Matthew Wilcox (Oracle)
Cc: Jeff Layton, Marc Dionne, Ilya Dryomov, linux-afs, ceph-devel,
linux-cachefs, dhowells, Jeff Layton, Ilya Dryomov,
linux-fsdevel, linux-cachefs, linux-afs, linux-nfs, linux-cifs,
ceph-devel, v9fs-developer, devel, linux-mm, linux-kernel
Convert the AFS directory handling code to use folios.
With these changes, afs passes -g quick xfstests.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Matthew Wilcox (Oracle) <willy@infradead.org>
cc: Jeff Layton <jlayton@kernel.org>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Ilya Dryomov <idryomov@gmail.com>
cc: linux-afs@lists.infradead.org
cc: ceph-devel@vger.kernel.org
cc: linux-cachefs@redhat.com
---
fs/afs/dir.c | 229 ++++++++++++++++++++++-------------------------------
fs/afs/dir_edit.c | 154 ++++++++++++++++++------------------
2 files changed, 174 insertions(+), 209 deletions(-)
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 78719f2f567e..0c2e83311242 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -103,13 +103,13 @@ struct afs_lookup_cookie {
};
/*
- * Drop the refs that we're holding on the pages we were reading into. We've
+ * Drop the refs that we're holding on the folios we were reading into. We've
* got refs on the first nr_pages pages.
*/
static void afs_dir_read_cleanup(struct afs_read *req)
{
struct address_space *mapping = req->vnode->vfs_inode.i_mapping;
- struct page *page;
+ struct folio *folio;
pgoff_t last = req->nr_pages - 1;
XA_STATE(xas, &mapping->i_pages, 0);
@@ -118,65 +118,56 @@ static void afs_dir_read_cleanup(struct afs_read *req)
return;
rcu_read_lock();
- xas_for_each(&xas, page, last) {
- if (xas_retry(&xas, page))
+ xas_for_each(&xas, folio, last) {
+ if (xas_retry(&xas, folio))
continue;
- BUG_ON(xa_is_value(page));
- BUG_ON(PageCompound(page));
- ASSERTCMP(page->mapping, ==, mapping);
+ BUG_ON(xa_is_value(folio));
+ ASSERTCMP(folio_file_mapping(folio), ==, mapping);
- put_page(page);
+ folio_put(folio);
}
rcu_read_unlock();
}
/*
- * check that a directory page is valid
+ * check that a directory folio is valid
*/
-static bool afs_dir_check_page(struct afs_vnode *dvnode, struct page *page,
- loff_t i_size)
+static bool afs_dir_check_folio(struct afs_vnode *dvnode, struct folio *folio,
+ loff_t i_size)
{
- struct afs_xdr_dir_page *dbuf;
- loff_t latter, off;
- int tmp, qty;
+ union afs_xdr_dir_block *block;
+ size_t offset, size;
+ loff_t pos;
- /* Determine how many magic numbers there should be in this page, but
+ /* Determine how many magic numbers there should be in this folio, but
* we must take care because the directory may change size under us.
*/
- off = page_offset(page);
- if (i_size <= off)
+ pos = folio_pos(folio);
+ if (i_size <= pos)
goto checked;
- latter = i_size - off;
- if (latter >= PAGE_SIZE)
- qty = PAGE_SIZE;
- else
- qty = latter;
- qty /= sizeof(union afs_xdr_dir_block);
-
- /* check them */
- dbuf = kmap_atomic(page);
- for (tmp = 0; tmp < qty; tmp++) {
- if (dbuf->blocks[tmp].hdr.magic != AFS_DIR_MAGIC) {
- printk("kAFS: %s(%lx): bad magic %d/%d is %04hx\n",
- __func__, dvnode->vfs_inode.i_ino, tmp, qty,
- ntohs(dbuf->blocks[tmp].hdr.magic));
- trace_afs_dir_check_failed(dvnode, off, i_size);
- kunmap(page);
+ size = min_t(loff_t, folio_size(folio), i_size - pos);
+ for (offset = 0; offset < size; offset += sizeof(*block)) {
+ block = kmap_local_folio(folio, offset);
+ if (block->hdr.magic != AFS_DIR_MAGIC) {
+ printk("kAFS: %s(%lx): [%llx] bad magic %zx/%zx is %04hx\n",
+ __func__, dvnode->vfs_inode.i_ino,
+ pos, offset, size, ntohs(block->hdr.magic));
+ trace_afs_dir_check_failed(dvnode, pos + offset, i_size);
+ kunmap_local(block);
trace_afs_file_error(dvnode, -EIO, afs_file_error_dir_bad_magic);
goto error;
}
/* Make sure each block is NUL terminated so we can reasonably
- * use string functions on it. The filenames in the page
+ * use string functions on it. The filenames in the folio
* *should* be NUL-terminated anyway.
*/
- ((u8 *)&dbuf->blocks[tmp])[AFS_DIR_BLOCK_SIZE - 1] = 0;
- }
-
- kunmap_atomic(dbuf);
+ ((u8 *)block)[AFS_DIR_BLOCK_SIZE - 1] = 0;
+ kunmap_local(block);
+ }
checked:
afs_stat_v(dvnode, n_read_dir);
return true;
@@ -190,11 +181,11 @@ static bool afs_dir_check_page(struct afs_vnode *dvnode, struct page *page,
*/
static void afs_dir_dump(struct afs_vnode *dvnode, struct afs_read *req)
{
- struct afs_xdr_dir_page *dbuf;
+ union afs_xdr_dir_block *block;
struct address_space *mapping = dvnode->vfs_inode.i_mapping;
- struct page *page;
- unsigned int i, qty = PAGE_SIZE / sizeof(union afs_xdr_dir_block);
+ struct folio *folio;
pgoff_t last = req->nr_pages - 1;
+ size_t offset, size;
XA_STATE(xas, &mapping->i_pages, 0);
@@ -205,30 +196,28 @@ static void afs_dir_dump(struct afs_vnode *dvnode, struct afs_read *req)
req->pos, req->nr_pages,
req->iter->iov_offset, iov_iter_count(req->iter));
- xas_for_each(&xas, page, last) {
- if (xas_retry(&xas, page))
+ xas_for_each(&xas, folio, last) {
+ if (xas_retry(&xas, folio))
continue;
- BUG_ON(PageCompound(page));
- BUG_ON(page->mapping != mapping);
-
- dbuf = kmap_atomic(page);
- for (i = 0; i < qty; i++) {
- union afs_xdr_dir_block *block = &dbuf->blocks[i];
+ BUG_ON(folio_file_mapping(folio) != mapping);
- pr_warn("[%02lx] %32phN\n", page->index * qty + i, block);
+ size = min_t(loff_t, folio_size(folio), req->actual_len - folio_pos(folio));
+ for (offset = 0; offset < size; offset += sizeof(*block)) {
+ block = kmap_local_folio(folio, offset);
+ pr_warn("[%02lx] %32phN\n", folio_index(folio) + offset, block);
+ kunmap_local(block);
}
- kunmap_atomic(dbuf);
}
}
/*
- * Check all the pages in a directory. All the pages are held pinned.
+ * Check all the blocks in a directory. All the folios are held pinned.
*/
static int afs_dir_check(struct afs_vnode *dvnode, struct afs_read *req)
{
struct address_space *mapping = dvnode->vfs_inode.i_mapping;
- struct page *page;
+ struct folio *folio;
pgoff_t last = req->nr_pages - 1;
int ret = 0;
@@ -238,14 +227,13 @@ static int afs_dir_check(struct afs_vnode *dvnode, struct afs_read *req)
return 0;
rcu_read_lock();
- xas_for_each(&xas, page, last) {
- if (xas_retry(&xas, page))
+ xas_for_each(&xas, folio, last) {
+ if (xas_retry(&xas, folio))
continue;
- BUG_ON(PageCompound(page));
- BUG_ON(page->mapping != mapping);
+ BUG_ON(folio_file_mapping(folio) != mapping);
- if (!afs_dir_check_page(dvnode, page, req->file_size)) {
+ if (!afs_dir_check_folio(dvnode, folio, req->actual_len)) {
afs_dir_dump(dvnode, req);
ret = -EIO;
break;
@@ -274,15 +262,16 @@ static int afs_dir_open(struct inode *inode, struct file *file)
/*
* Read the directory into the pagecache in one go, scrubbing the previous
- * contents. The list of pages is returned, pinning them so that they don't
+ * contents. The list of folios is returned, pinning them so that they don't
* get reclaimed during the iteration.
*/
static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key)
__acquires(&dvnode->validate_lock)
{
+ struct address_space *mapping = dvnode->vfs_inode.i_mapping;
struct afs_read *req;
loff_t i_size;
- int nr_pages, i, n;
+ int nr_pages, i;
int ret;
_enter("");
@@ -320,43 +309,30 @@ static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key)
req->iter = &req->def_iter;
/* Fill in any gaps that we might find where the memory reclaimer has
- * been at work and pin all the pages. If there are any gaps, we will
+ * been at work and pin all the folios. If there are any gaps, we will
* need to reread the entire directory contents.
*/
i = req->nr_pages;
while (i < nr_pages) {
- struct page *pages[8], *page;
-
- n = find_get_pages_contig(dvnode->vfs_inode.i_mapping, i,
- min_t(unsigned int, nr_pages - i,
- ARRAY_SIZE(pages)),
- pages);
- _debug("find %u at %u/%u", n, i, nr_pages);
-
- if (n == 0) {
- gfp_t gfp = dvnode->vfs_inode.i_mapping->gfp_mask;
+ struct folio *folio;
+ folio = filemap_get_folio(mapping, i);
+ if (!folio) {
if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
afs_stat_v(dvnode, n_inval);
ret = -ENOMEM;
- page = __page_cache_alloc(gfp);
- if (!page)
+ folio = __filemap_get_folio(mapping,
+ i, FGP_LOCK | FGP_CREAT,
+ mapping->gfp_mask);
+ if (!folio)
goto error;
- ret = add_to_page_cache_lru(page,
- dvnode->vfs_inode.i_mapping,
- i, gfp);
- if (ret < 0)
- goto error;
-
- attach_page_private(page, (void *)1);
- unlock_page(page);
- req->nr_pages++;
- i++;
- } else {
- req->nr_pages += n;
- i += n;
+ folio_attach_private(folio, (void *)1);
+ folio_unlock(folio);
}
+
+ req->nr_pages += folio_nr_pages(folio);
+ i += folio_nr_pages(folio);
}
/* If we're going to reload, we need to lock all the pages to prevent
@@ -424,7 +400,7 @@ static int afs_dir_iterate_block(struct afs_vnode *dvnode,
size_t nlen;
int tmp;
- _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block);
+ _enter("%llx,%x", ctx->pos, blkoff);
curr = (ctx->pos - blkoff) / sizeof(union afs_xdr_dirent);
@@ -513,12 +489,10 @@ static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx,
struct key *key, afs_dataversion_t *_dir_version)
{
struct afs_vnode *dvnode = AFS_FS_I(dir);
- struct afs_xdr_dir_page *dbuf;
union afs_xdr_dir_block *dblock;
struct afs_read *req;
- struct page *page;
- unsigned blkoff, limit;
- void __rcu **slot;
+ struct folio *folio;
+ unsigned offset, size;
int ret;
_enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos);
@@ -540,43 +514,30 @@ static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx,
/* walk through the blocks in sequence */
ret = 0;
while (ctx->pos < req->actual_len) {
- blkoff = ctx->pos & ~(sizeof(union afs_xdr_dir_block) - 1);
-
- /* Fetch the appropriate page from the directory and re-add it
+ /* Fetch the appropriate folio from the directory and re-add it
* to the LRU. We have all the pages pinned with an extra ref.
*/
- rcu_read_lock();
- page = NULL;
- slot = radix_tree_lookup_slot(&dvnode->vfs_inode.i_mapping->i_pages,
- blkoff / PAGE_SIZE);
- if (slot)
- page = radix_tree_deref_slot(slot);
- rcu_read_unlock();
- if (!page) {
+ folio = __filemap_get_folio(dir->i_mapping, ctx->pos / PAGE_SIZE,
+ FGP_ACCESSED, 0);
+ if (!folio) {
ret = afs_bad(dvnode, afs_file_error_dir_missing_page);
break;
}
- mark_page_accessed(page);
- limit = blkoff & ~(PAGE_SIZE - 1);
+ offset = round_down(ctx->pos, sizeof(*dblock)) - folio_file_pos(folio);
+ size = min_t(loff_t, folio_size(folio),
+ req->actual_len - folio_file_pos(folio));
- dbuf = kmap(page);
-
- /* deal with the individual blocks stashed on this page */
do {
- dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) /
- sizeof(union afs_xdr_dir_block)];
- ret = afs_dir_iterate_block(dvnode, ctx, dblock, blkoff);
- if (ret != 1) {
- kunmap(page);
+ dblock = kmap_local_folio(folio, offset);
+ ret = afs_dir_iterate_block(dvnode, ctx, dblock,
+ folio_file_pos(folio) + offset);
+ kunmap_local(dblock);
+ if (ret != 1)
goto out;
- }
- blkoff += sizeof(union afs_xdr_dir_block);
+ } while (offset += sizeof(*dblock), offset < size);
- } while (ctx->pos < dir->i_size && blkoff < limit);
-
- kunmap(page);
ret = 0;
}
@@ -2056,42 +2017,42 @@ static int afs_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
}
/*
- * Release a directory page and clean up its private state if it's not busy
- * - return true if the page can now be released, false if not
+ * Release a directory folio and clean up its private state if it's not busy
+ * - return true if the folio can now be released, false if not
*/
-static int afs_dir_releasepage(struct page *page, gfp_t gfp_flags)
+static int afs_dir_releasepage(struct page *subpage, gfp_t gfp_flags)
{
- struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host);
+ struct folio *folio = page_folio(subpage);
+ struct afs_vnode *dvnode = AFS_FS_I(folio_inode(folio));
- _enter("{{%llx:%llu}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, page->index);
+ _enter("{{%llx:%llu}[%lu]}", dvnode->fid.vid, dvnode->fid.vnode, folio_index(folio));
- detach_page_private(page);
+ folio_detach_private(folio);
/* The directory will need reloading. */
if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
afs_stat_v(dvnode, n_relpg);
- return 1;
+ return true;
}
/*
- * invalidate part or all of a page
- * - release a page and clean up its private data if offset is 0 (indicating
- * the entire page)
+ * Invalidate part or all of a folio.
*/
-static void afs_dir_invalidatepage(struct page *page, unsigned int offset,
+static void afs_dir_invalidatepage(struct page *subpage, unsigned int offset,
unsigned int length)
{
- struct afs_vnode *dvnode = AFS_FS_I(page->mapping->host);
+ struct folio *folio = page_folio(subpage);
+ struct afs_vnode *dvnode = AFS_FS_I(folio_inode(folio));
- _enter("{%lu},%u,%u", page->index, offset, length);
+ _enter("{%lu},%u,%u", folio_index(folio), offset, length);
- BUG_ON(!PageLocked(page));
+ BUG_ON(!folio_test_locked(folio));
/* The directory will need reloading. */
if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
afs_stat_v(dvnode, n_inval);
- /* we clean up only if the entire page is being invalidated */
- if (offset == 0 && length == thp_size(page))
- detach_page_private(page);
+ /* we clean up only if the entire folio is being invalidated */
+ if (offset == 0 && length == folio_size(folio))
+ folio_detach_private(folio);
}
diff --git a/fs/afs/dir_edit.c b/fs/afs/dir_edit.c
index f4600c1353ad..5a9098a82830 100644
--- a/fs/afs/dir_edit.c
+++ b/fs/afs/dir_edit.c
@@ -104,6 +104,25 @@ static void afs_clear_contig_bits(union afs_xdr_dir_block *block,
block->hdr.bitmap[7] &= ~(u8)(mask >> 7 * 8);
}
+/*
+ * Get a new directory folio.
+ */
+static struct folio *afs_dir_get_folio(struct afs_vnode *vnode, pgoff_t index)
+{
+ struct address_space *mapping = vnode->vfs_inode.i_mapping;
+ struct folio *folio;
+
+ folio = __filemap_get_folio(mapping, index,
+ FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
+ mapping->gfp_mask);
+ if (!folio)
+ clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags);
+ else if (folio && !folio_test_private(folio))
+ folio_attach_private(folio, (void *)1);
+
+ return folio;
+}
+
/*
* Scan a directory block looking for a dirent of the right name.
*/
@@ -188,13 +207,11 @@ void afs_edit_dir_add(struct afs_vnode *vnode,
enum afs_edit_dir_reason why)
{
union afs_xdr_dir_block *meta, *block;
- struct afs_xdr_dir_page *meta_page, *dir_page;
union afs_xdr_dirent *de;
- struct page *page0, *page;
+ struct folio *folio0, *folio;
unsigned int need_slots, nr_blocks, b;
pgoff_t index;
loff_t i_size;
- gfp_t gfp;
int slot;
_enter(",,{%d,%s},", name->len, name->name);
@@ -206,10 +223,8 @@ void afs_edit_dir_add(struct afs_vnode *vnode,
return;
}
- gfp = vnode->vfs_inode.i_mapping->gfp_mask;
- page0 = find_or_create_page(vnode->vfs_inode.i_mapping, 0, gfp);
- if (!page0) {
- clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags);
+ folio0 = afs_dir_get_folio(vnode, 0);
+ if (!folio0) {
_leave(" [fgp]");
return;
}
@@ -217,42 +232,35 @@ void afs_edit_dir_add(struct afs_vnode *vnode,
/* Work out how many slots we're going to need. */
need_slots = afs_dir_calc_slots(name->len);
- meta_page = kmap(page0);
- meta = &meta_page->blocks[0];
+ meta = kmap_local_folio(folio0, 0);
if (i_size == 0)
goto new_directory;
nr_blocks = i_size / AFS_DIR_BLOCK_SIZE;
- /* Find a block that has sufficient slots available. Each VM page
+ /* Find a block that has sufficient slots available. Each folio
* contains two or more directory blocks.
*/
for (b = 0; b < nr_blocks + 1; b++) {
- /* If the directory extended into a new page, then we need to
- * tack a new page on the end.
+ /* If the directory extended into a new folio, then we need to
+ * tack a new folio on the end.
*/
index = b / AFS_DIR_BLOCKS_PER_PAGE;
- if (index == 0) {
- page = page0;
- dir_page = meta_page;
- } else {
- if (nr_blocks >= AFS_DIR_MAX_BLOCKS)
- goto error;
- gfp = vnode->vfs_inode.i_mapping->gfp_mask;
- page = find_or_create_page(vnode->vfs_inode.i_mapping,
- index, gfp);
- if (!page)
+ if (nr_blocks >= AFS_DIR_MAX_BLOCKS)
+ goto error;
+ if (index >= folio_nr_pages(folio0)) {
+ folio = afs_dir_get_folio(vnode, index);
+ if (!folio)
goto error;
- if (!PagePrivate(page))
- attach_page_private(page, (void *)1);
- dir_page = kmap(page);
+ } else {
+ folio = folio0;
}
+ block = kmap_local_folio(folio, b * AFS_DIR_BLOCK_SIZE - folio_file_pos(folio));
+
/* Abandon the edit if we got a callback break. */
if (!test_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
goto invalidated;
- block = &dir_page->blocks[b % AFS_DIR_BLOCKS_PER_PAGE];
-
_debug("block %u: %2u %3u %u",
b,
(b < AFS_DIR_BLOCKS_WITH_CTR) ? meta->meta.alloc_ctrs[b] : 99,
@@ -266,7 +274,7 @@ void afs_edit_dir_add(struct afs_vnode *vnode,
i_size_write(&vnode->vfs_inode, (b + 1) * AFS_DIR_BLOCK_SIZE);
}
- /* Only lower dir pages have a counter in the header. */
+ /* Only lower dir blocks have a counter in the header. */
if (b >= AFS_DIR_BLOCKS_WITH_CTR ||
meta->meta.alloc_ctrs[b] >= need_slots) {
/* We need to try and find one or more consecutive
@@ -279,10 +287,10 @@ void afs_edit_dir_add(struct afs_vnode *vnode,
}
}
- if (page != page0) {
- unlock_page(page);
- kunmap(page);
- put_page(page);
+ kunmap_local(block);
+ if (folio != folio0) {
+ folio_unlock(folio);
+ folio_put(folio);
}
}
@@ -298,8 +306,8 @@ void afs_edit_dir_add(struct afs_vnode *vnode,
i_size = AFS_DIR_BLOCK_SIZE;
i_size_write(&vnode->vfs_inode, i_size);
slot = AFS_DIR_RESV_BLOCKS0;
- page = page0;
- block = meta;
+ folio = folio0;
+ block = kmap_local_folio(folio, 0);
nr_blocks = 1;
b = 0;
@@ -318,10 +326,10 @@ void afs_edit_dir_add(struct afs_vnode *vnode,
/* Adjust the bitmap. */
afs_set_contig_bits(block, slot, need_slots);
- if (page != page0) {
- unlock_page(page);
- kunmap(page);
- put_page(page);
+ kunmap_local(block);
+ if (folio != folio0) {
+ folio_unlock(folio);
+ folio_put(folio);
}
/* Adjust the allocation counter. */
@@ -333,18 +341,19 @@ void afs_edit_dir_add(struct afs_vnode *vnode,
_debug("Insert %s in %u[%u]", name->name, b, slot);
out_unmap:
- unlock_page(page0);
- kunmap(page0);
- put_page(page0);
+ kunmap_local(meta);
+ folio_unlock(folio0);
+ folio_put(folio0);
_leave("");
return;
invalidated:
trace_afs_edit_dir(vnode, why, afs_edit_dir_create_inval, 0, 0, 0, 0, name->name);
clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags);
- if (page != page0) {
- kunmap(page);
- put_page(page);
+ kunmap_local(block);
+ if (folio != folio0) {
+ folio_unlock(folio);
+ folio_put(folio);
}
goto out_unmap;
@@ -364,10 +373,9 @@ void afs_edit_dir_add(struct afs_vnode *vnode,
void afs_edit_dir_remove(struct afs_vnode *vnode,
struct qstr *name, enum afs_edit_dir_reason why)
{
- struct afs_xdr_dir_page *meta_page, *dir_page;
union afs_xdr_dir_block *meta, *block;
union afs_xdr_dirent *de;
- struct page *page0, *page;
+ struct folio *folio0, *folio;
unsigned int need_slots, nr_blocks, b;
pgoff_t index;
loff_t i_size;
@@ -384,9 +392,8 @@ void afs_edit_dir_remove(struct afs_vnode *vnode,
}
nr_blocks = i_size / AFS_DIR_BLOCK_SIZE;
- page0 = find_lock_page(vnode->vfs_inode.i_mapping, 0);
- if (!page0) {
- clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags);
+ folio0 = afs_dir_get_folio(vnode, 0);
+ if (!folio0) {
_leave(" [fgp]");
return;
}
@@ -394,30 +401,27 @@ void afs_edit_dir_remove(struct afs_vnode *vnode,
/* Work out how many slots we're going to discard. */
need_slots = afs_dir_calc_slots(name->len);
- meta_page = kmap(page0);
- meta = &meta_page->blocks[0];
+ meta = kmap_local_folio(folio0, 0);
- /* Find a page that has sufficient slots available. Each VM page
+ /* Find a block that has sufficient slots available. Each folio
* contains two or more directory blocks.
*/
for (b = 0; b < nr_blocks; b++) {
index = b / AFS_DIR_BLOCKS_PER_PAGE;
- if (index != 0) {
- page = find_lock_page(vnode->vfs_inode.i_mapping, index);
- if (!page)
+ if (index >= folio_nr_pages(folio0)) {
+ folio = afs_dir_get_folio(vnode, index);
+ if (!folio)
goto error;
- dir_page = kmap(page);
} else {
- page = page0;
- dir_page = meta_page;
+ folio = folio0;
}
+ block = kmap_local_folio(folio, b * AFS_DIR_BLOCK_SIZE - folio_file_pos(folio));
+
/* Abandon the edit if we got a callback break. */
if (!test_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
goto invalidated;
- block = &dir_page->blocks[b % AFS_DIR_BLOCKS_PER_PAGE];
-
if (b > AFS_DIR_BLOCKS_WITH_CTR ||
meta->meta.alloc_ctrs[b] <= AFS_DIR_SLOTS_PER_BLOCK - 1 - need_slots) {
slot = afs_dir_scan_block(block, name, b);
@@ -425,10 +429,10 @@ void afs_edit_dir_remove(struct afs_vnode *vnode,
goto found_dirent;
}
- if (page != page0) {
- unlock_page(page);
- kunmap(page);
- put_page(page);
+ kunmap_local(block);
+ if (folio != folio0) {
+ folio_unlock(folio);
+ folio_put(folio);
}
}
@@ -449,10 +453,10 @@ void afs_edit_dir_remove(struct afs_vnode *vnode,
/* Adjust the bitmap. */
afs_clear_contig_bits(block, slot, need_slots);
- if (page != page0) {
- unlock_page(page);
- kunmap(page);
- put_page(page);
+ kunmap_local(block);
+ if (folio != folio0) {
+ folio_unlock(folio);
+ folio_put(folio);
}
/* Adjust the allocation counter. */
@@ -464,9 +468,9 @@ void afs_edit_dir_remove(struct afs_vnode *vnode,
_debug("Remove %s from %u[%u]", name->name, b, slot);
out_unmap:
- unlock_page(page0);
- kunmap(page0);
- put_page(page0);
+ kunmap_local(meta);
+ folio_unlock(folio0);
+ folio_put(folio0);
_leave("");
return;
@@ -474,10 +478,10 @@ void afs_edit_dir_remove(struct afs_vnode *vnode,
trace_afs_edit_dir(vnode, why, afs_edit_dir_delete_inval,
0, 0, 0, 0, name->name);
clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags);
- if (page != page0) {
- unlock_page(page);
- kunmap(page);
- put_page(page);
+ kunmap_local(block);
+ if (folio != folio0) {
+ folio_unlock(folio);
+ folio_put(folio);
}
goto out_unmap;
^ permalink raw reply related [flat|nested] 12+ messages in thread