nfsd: more robust allocation failure handling in nfsd_file_cache_init
authorAmir Goldstein <amir73il@gmail.com>
Thu, 24 Feb 2022 16:17:05 +0000 (18:17 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 8 Apr 2022 12:23:11 +0000 (14:23 +0200)
[ Upstream commit 4d2eeafecd6c83b4444db3dc0ada201c89b1aa44 ]

The nfsd file cache table can be pretty large and its allocation
may require as many as 80 contigious pages.

Employ the same fix that was employed for similar issue that was
reported for the reply cache hash table allocation several years ago
by commit 8f97514b423a ("nfsd: more robust allocation failure handling
in nfsd_reply_cache_init").

Fixes: 65294c1f2c5e ("nfsd: add a new struct file caching facility to nfsd")
Link: https://lore.kernel.org/linux-nfs/e3cdaeec85a6cfec980e87fc294327c0381c1778.camel@kernel.org/
Suggested-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
fs/nfsd/filecache.c

index be3c1aa..7e23c58 100644 (file)
@@ -641,7 +641,7 @@ nfsd_file_cache_init(void)
        if (!nfsd_filecache_wq)
                goto out;
 
-       nfsd_file_hashtbl = kcalloc(NFSD_FILE_HASH_SIZE,
+       nfsd_file_hashtbl = kvcalloc(NFSD_FILE_HASH_SIZE,
                                sizeof(*nfsd_file_hashtbl), GFP_KERNEL);
        if (!nfsd_file_hashtbl) {
                pr_err("nfsd: unable to allocate nfsd_file_hashtbl\n");
@@ -709,7 +709,7 @@ out_err:
        nfsd_file_slab = NULL;
        kmem_cache_destroy(nfsd_file_mark_slab);
        nfsd_file_mark_slab = NULL;
-       kfree(nfsd_file_hashtbl);
+       kvfree(nfsd_file_hashtbl);
        nfsd_file_hashtbl = NULL;
        destroy_workqueue(nfsd_filecache_wq);
        nfsd_filecache_wq = NULL;
@@ -855,7 +855,7 @@ nfsd_file_cache_shutdown(void)
        fsnotify_wait_marks_destroyed();
        kmem_cache_destroy(nfsd_file_mark_slab);
        nfsd_file_mark_slab = NULL;
-       kfree(nfsd_file_hashtbl);
+       kvfree(nfsd_file_hashtbl);
        nfsd_file_hashtbl = NULL;
        destroy_workqueue(nfsd_filecache_wq);
        nfsd_filecache_wq = NULL;