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cifs: Add mempools for cifs_io_request and cifs_io_subrequest structs

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Add mempools for the allocation of cifs_io_request and cifs_io_subrequest
structs for netfslib to use so that it can guarantee eventual allocation in
writeback.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <sfrench@samba.org>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
This commit is contained in:
David Howells 2024-03-15 18:03:30 +00:00
parent 3758c485f6
commit edea94a697
2 changed files with 56 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

55
fs/smb/client/cifsfs.c
View file

@ -371,9 +371,13 @@ static struct kmem_cache *cifs_inode_cachep;
static struct kmem_cache *cifs_req_cachep;
static struct kmem_cache *cifs_mid_cachep;
static struct kmem_cache *cifs_sm_req_cachep;
static struct kmem_cache *cifs_io_request_cachep;
static struct kmem_cache *cifs_io_subrequest_cachep;
mempool_t *cifs_sm_req_poolp;
mempool_t *cifs_req_poolp;
mempool_t *cifs_mid_poolp;
mempool_t cifs_io_request_pool;
mempool_t cifs_io_subrequest_pool;
static struct inode *
cifs_alloc_inode(struct super_block *sb)
@ -1750,6 +1754,48 @@ static void destroy_mids(void)
kmem_cache_destroy(cifs_mid_cachep);
}
static int cifs_init_netfs(void)
{
cifs_io_request_cachep =
kmem_cache_create("cifs_io_request",
sizeof(struct netfs_io_request), 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!cifs_io_request_cachep)
goto nomem_req;
if (mempool_init_slab_pool(&cifs_io_request_pool, 100, cifs_io_request_cachep) < 0)
goto nomem_reqpool;
cifs_io_subrequest_cachep =
kmem_cache_create("cifs_io_subrequest",
sizeof(struct cifs_io_subrequest), 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!cifs_io_subrequest_cachep)
goto nomem_subreq;
if (mempool_init_slab_pool(&cifs_io_subrequest_pool, 100, cifs_io_subrequest_cachep) < 0)
goto nomem_subreqpool;
return 0;
nomem_subreqpool:
kmem_cache_destroy(cifs_io_subrequest_cachep);
nomem_subreq:
mempool_destroy(&cifs_io_request_pool);
nomem_reqpool:
kmem_cache_destroy(cifs_io_request_cachep);
nomem_req:
return -ENOMEM;
}
static void cifs_destroy_netfs(void)
{
mempool_destroy(&cifs_io_subrequest_pool);
kmem_cache_destroy(cifs_io_subrequest_cachep);
mempool_destroy(&cifs_io_request_pool);
kmem_cache_destroy(cifs_io_request_cachep);
}
static int __init
init_cifs(void)
{
@ -1854,10 +1900,14 @@ init_cifs(void)
if (rc)
goto out_destroy_deferredclose_wq;
rc = init_mids();
rc = cifs_init_netfs();
if (rc)
goto out_destroy_inodecache;
rc = init_mids();
if (rc)
goto out_destroy_netfs;
rc = cifs_init_request_bufs();
if (rc)
goto out_destroy_mids;
@ -1912,6 +1962,8 @@ init_cifs(void)
cifs_destroy_request_bufs();
out_destroy_mids:
destroy_mids();
out_destroy_netfs:
cifs_destroy_netfs();
out_destroy_inodecache:
cifs_destroy_inodecache();
out_destroy_deferredclose_wq:
@ -1950,6 +2002,7 @@ exit_cifs(void)
#endif
cifs_destroy_request_bufs();
destroy_mids();
cifs_destroy_netfs();
cifs_destroy_inodecache();
destroy_workqueue(deferredclose_wq);
destroy_workqueue(cifsoplockd_wq);

2
fs/smb/client/cifsglob.h
View file

@ -2094,6 +2094,8 @@ extern __u32 cifs_lock_secret;
extern mempool_t *cifs_sm_req_poolp;
extern mempool_t *cifs_req_poolp;
extern mempool_t *cifs_mid_poolp;
extern mempool_t cifs_io_request_pool;
extern mempool_t cifs_io_subrequest_pool;
/* Operations for different SMB versions */
#define SMB1_VERSION_STRING "1.0"