From 5c6e5b60aae4347223f176966455010a5715b863 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 22 Jun 2016 14:13:12 -0400 Subject: NFS: Fix an Oops in the pNFS files and flexfiles connection setup to the DS Chris Worley reports: RIP: 0010:[] [] rpc_new_client+0x2a0/0x2e0 [sunrpc] RSP: 0018:ffff880158f6f548 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff880234f8bc00 RCX: 000000000000ea60 RDX: 0000000000074cc0 RSI: 000000000000ea60 RDI: ffff880234f8bcf0 RBP: ffff880158f6f588 R08: 000000000001ac80 R09: ffff880237003300 R10: ffff880201171000 R11: ffffea0000d75200 R12: ffffffffa03afc60 R13: ffff880230c18800 R14: 0000000000000000 R15: ffff880158f6f680 FS: 00007f0e32673740(0000) GS:ffff88023fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000008 CR3: 0000000234886000 CR4: 00000000001406e0 Stack: ffffffffa047a680 0000000000000000 ffff880158f6f598 ffff880158f6f680 ffff880158f6f680 ffff880234d11d00 ffff88023357f800 ffff880158f6f7d0 ffff880158f6f5b8 ffffffffa024660a ffff880158f6f5b8 ffffffffa02492ec Call Trace: [] rpc_create_xprt+0x1a/0xb0 [sunrpc] [] ? xprt_create_transport+0x13c/0x240 [sunrpc] [] rpc_create+0xc6/0x1a0 [sunrpc] [] nfs_create_rpc_client+0xf5/0x140 [nfs] [] nfs_init_client+0x3a/0xd0 [nfs] [] nfs_get_client+0x25f/0x310 [nfs] [] ? rpc_ntop+0xe8/0x100 [sunrpc] [] nfs3_set_ds_client+0xcc/0x100 [nfsv3] [] nfs4_pnfs_ds_connect+0x120/0x400 [nfsv4] [] nfs4_ff_layout_prepare_ds+0xe7/0x330 [nfs_layout_flexfiles] [] ff_layout_pg_init_write+0xcb/0x280 [nfs_layout_flexfiles] [] __nfs_pageio_add_request+0x12c/0x490 [nfs] [] nfs_pageio_add_request+0xc2/0x2a0 [nfs] [] ? nfs_pageio_init+0x75/0x120 [nfs] [] nfs_do_writepage+0x120/0x270 [nfs] [] nfs_writepage_locked+0x61/0xc0 [nfs] [] ? __percpu_counter_add+0x55/0x70 [] nfs_wb_single_page+0xef/0x1c0 [nfs] [] ? __dec_zone_page_state+0x33/0x40 [] nfs_launder_page+0x41/0x90 [nfs] [] invalidate_inode_pages2_range+0x340/0x3a0 [] invalidate_inode_pages2+0x17/0x20 [] nfs_release+0x9e/0xb0 [nfs] [] ? nfs_open+0x60/0x60 [nfs] [] nfs_file_release+0x3d/0x60 [nfs] [] __fput+0xdc/0x1e0 [] ____fput+0xe/0x10 [] task_work_run+0xc4/0xe0 [] do_exit+0x2e8/0xb30 [] ? do_audit_syscall_entry+0x6c/0x70 [] ? __audit_syscall_exit+0x1e6/0x280 [] do_group_exit+0x3f/0xa0 [] SyS_exit_group+0x14/0x20 [] system_call_fastpath+0x12/0x71 Which seems to be due to a call to utsname() when in a task exit context in order to determine the hostname to set in rpc_new_client(). In reality, what we want here is not the hostname of the current task, but the hostname that was used to set up the metadata server. Signed-off-by: Trond Myklebust --- fs/nfs/client.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) (limited to 'fs/nfs/client.c') diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 0c96528..4849d0f 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -367,8 +367,6 @@ nfs_found_client(const struct nfs_client_initdata *cl_init, */ struct nfs_client * nfs_get_client(const struct nfs_client_initdata *cl_init, - const struct rpc_timeout *timeparms, - const char *ip_addr, rpc_authflavor_t authflavour) { struct nfs_client *clp, *new = NULL; @@ -399,7 +397,7 @@ nfs_get_client(const struct nfs_client_initdata *cl_init, &nn->nfs_client_list); spin_unlock(&nn->nfs_client_lock); new->cl_flags = cl_init->init_flags; - return rpc_ops->init_client(new, timeparms, ip_addr); + return rpc_ops->init_client(new, cl_init); } spin_unlock(&nn->nfs_client_lock); @@ -470,7 +468,7 @@ EXPORT_SYMBOL_GPL(nfs_init_timeout_values); * Create an RPC client handle */ int nfs_create_rpc_client(struct nfs_client *clp, - const struct rpc_timeout *timeparms, + const struct nfs_client_initdata *cl_init, rpc_authflavor_t flavor) { struct rpc_clnt *clnt = NULL; @@ -479,8 +477,9 @@ int nfs_create_rpc_client(struct nfs_client *clp, .protocol = clp->cl_proto, .address = (struct sockaddr *)&clp->cl_addr, .addrsize = clp->cl_addrlen, - .timeout = timeparms, + .timeout = cl_init->timeparms, .servername = clp->cl_hostname, + .nodename = cl_init->nodename, .program = &nfs_program, .version = clp->rpc_ops->version, .authflavor = flavor, @@ -591,14 +590,12 @@ EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); * nfs_init_client - Initialise an NFS2 or NFS3 client * * @clp: nfs_client to initialise - * @timeparms: timeout parameters for underlying RPC transport - * @ip_addr: IP presentation address (not used) + * @cl_init: Initialisation parameters * * Returns pointer to an NFS client, or an ERR_PTR value. */ struct nfs_client *nfs_init_client(struct nfs_client *clp, - const struct rpc_timeout *timeparms, - const char *ip_addr) + const struct nfs_client_initdata *cl_init) { int error; @@ -612,7 +609,7 @@ struct nfs_client *nfs_init_client(struct nfs_client *clp, * Create a client RPC handle for doing FSSTAT with UNIX auth only * - RFC 2623, sec 2.3.2 */ - error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); + error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); if (error < 0) goto error; nfs_mark_client_ready(clp, NFS_CS_READY); @@ -633,6 +630,7 @@ static int nfs_init_server(struct nfs_server *server, const struct nfs_parsed_mount_data *data, struct nfs_subversion *nfs_mod) { + struct rpc_timeout timeparms; struct nfs_client_initdata cl_init = { .hostname = data->nfs_server.hostname, .addr = (const struct sockaddr *)&data->nfs_server.address, @@ -640,8 +638,8 @@ static int nfs_init_server(struct nfs_server *server, .nfs_mod = nfs_mod, .proto = data->nfs_server.protocol, .net = data->net, + .timeparms = &timeparms, }; - struct rpc_timeout timeparms; struct nfs_client *clp; int error; @@ -653,7 +651,7 @@ static int nfs_init_server(struct nfs_server *server, set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); /* Allocate or find a client reference we can use */ - clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); + clp = nfs_get_client(&cl_init, RPC_AUTH_UNIX); if (IS_ERR(clp)) { dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); return PTR_ERR(clp); -- cgit v1.1