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afs next

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Merge tag 'afs-next-20221222' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull afs update from David Howells:
 "A fix for a couple of missing resource counter decrements, two small
  cleanups of now-unused bits of code and a patch to remove writepage
  support from afs"

* tag 'afs-next-20221222' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Stop implementing ->writepage()
  afs: remove afs_cache_netfs and afs_zap_permits() declarations
  afs: remove variable nr_servers
  afs: Fix lost servers_outstanding count
This commit is contained in:
Linus Torvalds 2022-12-22 11:17:34 -08:00
commit ff75ec43a2
6 changed files with 55 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
fs/afs/dir.c
View File

@ -77,6 +77,7 @@ const struct address_space_operations afs_dir_aops = {
.dirty_folio = afs_dir_dirty_folio,
.release_folio = afs_dir_release_folio,
.invalidate_folio = afs_dir_invalidate_folio,
.migrate_folio = filemap_migrate_folio,
};
const struct dentry_operations afs_fs_dentry_operations = {

3
fs/afs/file.c
View File

@ -58,14 +58,15 @@ const struct address_space_operations afs_file_aops = {
.invalidate_folio = afs_invalidate_folio,
.write_begin = afs_write_begin,
.write_end = afs_write_end,
.writepage = afs_writepage,
.writepages = afs_writepages,
.migrate_folio = filemap_migrate_folio,
};
const struct address_space_operations afs_symlink_aops = {
.read_folio = afs_symlink_read_folio,
.release_folio = afs_release_folio,
.invalidate_folio = afs_invalidate_folio,
.migrate_folio = filemap_migrate_folio,
};
static const struct vm_operations_struct afs_vm_ops = {

5
fs/afs/fs_probe.c
View File

@ -366,12 +366,15 @@ void afs_fs_probe_dispatcher(struct work_struct *work)
unsigned long nowj, timer_at, poll_at;
bool first_pass = true, set_timer = false;
if (!net->live)
if (!net->live) {
afs_dec_servers_outstanding(net);
return;
}
_enter("");
if (list_empty(&net->fs_probe_fast) && list_empty(&net->fs_probe_slow)) {
afs_dec_servers_outstanding(net);
_leave(" [none]");
return;
}

8
fs/afs/internal.h
View File

@ -971,13 +971,6 @@ extern int afs_end_cursor(struct afs_addr_cursor *);
extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
/*
* cache.c
*/
#ifdef CONFIG_AFS_FSCACHE
extern struct fscache_netfs afs_cache_netfs;
#endif
/*
* callback.c
*/
@ -1391,7 +1384,6 @@ extern void afs_put_permits(struct afs_permits *);
extern void afs_clear_permits(struct afs_vnode *);
extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int,
struct afs_status_cb *);
extern void afs_zap_permits(struct rcu_head *);
extern struct key *afs_request_key(struct afs_cell *);
extern struct key *afs_request_key_rcu(struct afs_cell *);
extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);

6
fs/afs/volume.c
View File

@ -70,11 +70,7 @@ static struct afs_volume *afs_alloc_volume(struct afs_fs_context *params,
{
struct afs_server_list *slist;
struct afs_volume *volume;
int ret = -ENOMEM, nr_servers = 0, i;
for (i = 0; i < vldb->nr_servers; i++)
if (vldb->fs_mask[i] & type_mask)
nr_servers++;
int ret = -ENOMEM;
volume = kzalloc(sizeof(struct afs_volume), GFP_KERNEL);
if (!volume)

83
fs/afs/write.c
View File

@ -14,6 +14,11 @@
#include <linux/netfs.h>
#include "internal.h"
static int afs_writepages_region(struct address_space *mapping,
struct writeback_control *wbc,
loff_t start, loff_t end, loff_t *_next,
bool max_one_loop);
static void afs_write_to_cache(struct afs_vnode *vnode, loff_t start, size_t len,
loff_t i_size, bool caching);
@ -38,6 +43,25 @@ static void afs_folio_start_fscache(bool caching, struct folio *folio)
}
#endif
/*
* Flush out a conflicting write. This may extend the write to the surrounding
* pages if also dirty and contiguous to the conflicting region..
*/
static int afs_flush_conflicting_write(struct address_space *mapping,
struct folio *folio)
{
struct writeback_control wbc = {
.sync_mode = WB_SYNC_ALL,
.nr_to_write = LONG_MAX,
.range_start = folio_pos(folio),
.range_end = LLONG_MAX,
};
loff_t next;
return afs_writepages_region(mapping, &wbc, folio_pos(folio), LLONG_MAX,
&next, true);
}
/*
* prepare to perform part of a write to a page
*/
@ -80,7 +104,8 @@ try_again:
if (folio_test_writeback(folio)) {
trace_afs_folio_dirty(vnode, tracepoint_string("alrdy"), folio);
goto flush_conflicting_write;
folio_unlock(folio);
goto wait_for_writeback;
}
/* If the file is being filled locally, allow inter-write
* spaces to be merged into writes. If it's not, only write
@ -99,8 +124,15 @@ try_again:
* flush the page out.
*/
flush_conflicting_write:
_debug("flush conflict");
ret = folio_write_one(folio);
trace_afs_folio_dirty(vnode, tracepoint_string("confl"), folio);
folio_unlock(folio);
ret = afs_flush_conflicting_write(mapping, folio);
if (ret < 0)
goto error;
wait_for_writeback:
ret = folio_wait_writeback_killable(folio);
if (ret < 0)
goto error;
@ -663,40 +695,13 @@ static ssize_t afs_write_back_from_locked_folio(struct address_space *mapping,
return ret;
}
/*
* write a page back to the server
* - the caller locked the page for us
*/
int afs_writepage(struct page *subpage, struct writeback_control *wbc)
{
struct folio *folio = page_folio(subpage);
ssize_t ret;
loff_t start;
_enter("{%lx},", folio_index(folio));
#ifdef CONFIG_AFS_FSCACHE
folio_wait_fscache(folio);
#endif
start = folio_index(folio) * PAGE_SIZE;
ret = afs_write_back_from_locked_folio(folio_mapping(folio), wbc,
folio, start, LLONG_MAX - start);
if (ret < 0) {
_leave(" = %zd", ret);
return ret;
}
_leave(" = 0");
return 0;
}
/*
* write a region of pages back to the server
*/
static int afs_writepages_region(struct address_space *mapping,
struct writeback_control *wbc,
loff_t start, loff_t end, loff_t *_next)
loff_t start, loff_t end, loff_t *_next,
bool max_one_loop)
{
struct folio *folio;
struct page *head_page;
@ -775,6 +780,9 @@ static int afs_writepages_region(struct address_space *mapping,
start += ret;
if (max_one_loop)
break;
cond_resched();
} while (wbc->nr_to_write > 0);
@ -806,24 +814,27 @@ int afs_writepages(struct address_space *mapping,
if (wbc->range_cyclic) {
start = mapping->writeback_index * PAGE_SIZE;
ret = afs_writepages_region(mapping, wbc, start, LLONG_MAX, &next);
ret = afs_writepages_region(mapping, wbc, start, LLONG_MAX,
&next, false);
if (ret == 0) {
mapping->writeback_index = next / PAGE_SIZE;
if (start > 0 && wbc->nr_to_write > 0) {
ret = afs_writepages_region(mapping, wbc, 0,
start, &next);
start, &next, false);
if (ret == 0)
mapping->writeback_index =
next / PAGE_SIZE;
}
}
} else if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) {
ret = afs_writepages_region(mapping, wbc, 0, LLONG_MAX, &next);
ret = afs_writepages_region(mapping, wbc, 0, LLONG_MAX,
&next, false);
if (wbc->nr_to_write > 0 && ret == 0)
mapping->writeback_index = next / PAGE_SIZE;
} else {
ret = afs_writepages_region(mapping, wbc,
wbc->range_start, wbc->range_end, &next);
wbc->range_start, wbc->range_end,
&next, false);
}
up_read(&vnode->validate_lock);