From 694e096fd7c2a7d40760fc9c9dfc826bdd495ea4 Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Wed, 13 Nov 2013 12:29:08 -0500 Subject: NFS: Enabling v4.2 should not recompile nfsd and lockd When CONFIG_NFS_V4_2 is toggled nfsd and lockd will be recompiled, instead of only the nfs client. This patch moves a small amount of code into the client directory to avoid unnecessary recompiles. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h index 8485978..9838fb0 100644 --- a/fs/nfs/blocklayout/blocklayout.h +++ b/fs/nfs/blocklayout/blocklayout.h @@ -36,6 +36,7 @@ #include #include +#include "../nfs4_fs.h" #include "../pnfs.h" #include "../netns.h" diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c index fc0f95e..d25f10f 100644 --- a/fs/nfs/dns_resolve.c +++ b/fs/nfs/dns_resolve.c @@ -46,7 +46,9 @@ ssize_t nfs_dns_resolve_name(struct net *net, char *name, size_t namelen, #include #include #include +#include +#include "nfs4_fs.h" #include "dns_resolve.h" #include "cache_lib.h" #include "netns.h" diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index bca6a3e..8b5cc04 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -269,6 +269,21 @@ extern const u32 nfs41_maxgetdevinfo_overhead; extern struct rpc_procinfo nfs4_procedures[]; #endif +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); +static inline void nfs4_label_free(struct nfs4_label *label) +{ + if (label) { + kfree(label->label); + kfree(label); + } + return; +} +#else +static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } +static inline void nfs4_label_free(void *label) {} +#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ + /* proc.c */ void nfs_close_context(struct nfs_open_context *ctx, int is_sync); extern struct nfs_client *nfs_init_client(struct nfs_client *clp, diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 3ce79b0..5609edc 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -9,6 +9,14 @@ #ifndef __LINUX_FS_NFS_NFS4_FS_H #define __LINUX_FS_NFS_NFS4_FS_H +#if defined(CONFIG_NFS_V4_2) +#define NFS4_MAX_MINOR_VERSION 2 +#elif defined(CONFIG_NFS_V4_1) +#define NFS4_MAX_MINOR_VERSION 1 +#else +#define NFS4_MAX_MINOR_VERSION 0 +#endif + #if IS_ENABLED(CONFIG_NFS_V4) #define NFS4_MAX_LOOP_ON_RECOVER (10) diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index c6f41b6..ddd8487 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -410,16 +410,6 @@ enum lock_type4 { #define NFS4_VERSION 4 #define NFS4_MINOR_VERSION 0 -#if defined(CONFIG_NFS_V4_2) -#define NFS4_MAX_MINOR_VERSION 2 -#else -#if defined(CONFIG_NFS_V4_1) -#define NFS4_MAX_MINOR_VERSION 1 -#else -#define NFS4_MAX_MINOR_VERSION 0 -#endif /* CONFIG_NFS_V4_1 */ -#endif /* CONFIG_NFS_V4_2 */ - #define NFS4_DEBUG 1 /* Index of predefined Linux client operations */ diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index 14a4820..4899737 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -507,24 +507,6 @@ extern int nfs_mountpoint_expiry_timeout; extern void nfs_release_automount_timer(void); /* - * linux/fs/nfs/nfs4proc.c - */ -#ifdef CONFIG_NFS_V4_SECURITY_LABEL -extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); -static inline void nfs4_label_free(struct nfs4_label *label) -{ - if (label) { - kfree(label->label); - kfree(label); - } - return; -} -#else -static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } -static inline void nfs4_label_free(void *label) {} -#endif - -/* * linux/fs/nfs/unlink.c */ extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); -- cgit v0.10.2 From 829e57d7c590832caad04355b044667902194f6a Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 18 Nov 2013 14:33:50 -0500 Subject: NFS: Fix a warning in nfs_setsecurity MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fix the following warning: linux-nfs/fs/nfs/inode.c:315:1: warning: ‘inline’ is not at beginning of declaration [-Wold-style-declaration] Signed-off-by: Trond Myklebust diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 18ab2da..00ad1c2 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -312,7 +312,7 @@ struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) } EXPORT_SYMBOL_GPL(nfs4_label_alloc); #else -void inline nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, +void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, struct nfs4_label *label) { } -- cgit v0.10.2 From 4a82fd7c4e78a1b7a224f9ae8bb7e1fd95f670e0 Mon Sep 17 00:00:00 2001 From: Andy Adamson Date: Fri, 15 Nov 2013 16:36:16 -0500 Subject: NFSv4 wait on recovery for async session errors When the state manager is processing the NFS4CLNT_DELEGRETURN flag, session draining is off, but DELEGRETURN can still get a session error. The async handler calls nfs4_schedule_session_recovery returns -EAGAIN, and the DELEGRETURN done then restarts the RPC task in the prepare state. With the state manager still processing the NFS4CLNT_DELEGRETURN flag with session draining off, these DELEGRETURNs will cycle with errors filling up the session slots. This prevents OPEN reclaims (from nfs_delegation_claim_opens) required by the NFS4CLNT_DELEGRETURN state manager processing from completing, hanging the state manager in the __rpc_wait_for_completion_task in nfs4_run_open_task as seen in this kernel thread dump: kernel: 4.12.32.53-ma D 0000000000000000 0 3393 2 0x00000000 kernel: ffff88013995fb60 0000000000000046 ffff880138cc5400 ffff88013a9df140 kernel: ffff8800000265c0 ffffffff8116eef0 ffff88013fc10080 0000000300000001 kernel: ffff88013a4ad058 ffff88013995ffd8 000000000000fbc8 ffff88013a4ad058 kernel: Call Trace: kernel: [] ? cache_alloc_refill+0x1c0/0x240 kernel: [] ? rpc_wait_bit_killable+0x0/0xa0 [sunrpc] kernel: [] rpc_wait_bit_killable+0x42/0xa0 [sunrpc] kernel: [] __wait_on_bit+0x5f/0x90 kernel: [] ? rpc_wait_bit_killable+0x0/0xa0 [sunrpc] kernel: [] out_of_line_wait_on_bit+0x78/0x90 kernel: [] ? wake_bit_function+0x0/0x50 kernel: [] __rpc_wait_for_completion_task+0x2d/0x30 [sunrpc] kernel: [] nfs4_run_open_task+0x11c/0x160 [nfs] kernel: [] nfs4_open_recover_helper+0x87/0x120 [nfs] kernel: [] nfs4_open_recover+0xc6/0x150 [nfs] kernel: [] ? nfs4_open_recoverdata_alloc+0x2f/0x60 [nfs] kernel: [] nfs4_open_delegation_recall+0x6a/0xa0 [nfs] kernel: [] nfs_end_delegation_return+0x120/0x2e0 [nfs] kernel: [] ? queue_work+0x1f/0x30 kernel: [] nfs_client_return_marked_delegations+0xd7/0x110 [nfs] kernel: [] nfs4_run_state_manager+0x548/0x620 [nfs] kernel: [] ? nfs4_run_state_manager+0x0/0x620 [nfs] kernel: [] kthread+0x96/0xa0 kernel: [] child_rip+0xa/0x20 kernel: [] ? kthread+0x0/0xa0 kernel: [] ? child_rip+0x0/0x20 The state manager can not therefore process the DELEGRETURN session errors. Change the async handler to wait for recovery on session errors. Signed-off-by: Andy Adamson Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 5ab33c0..1f4edfb 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -4803,7 +4803,7 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, dprintk("%s ERROR %d, Reset session\n", __func__, task->tk_status); nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); - goto restart_call; + goto wait_on_recovery; #endif /* CONFIG_NFS_V4_1 */ case -NFS4ERR_DELAY: nfs_inc_server_stats(server, NFSIOS_DELAY); -- cgit v0.10.2 From c97cf606e43b85a6cf158b810375dd77312024db Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 19 Nov 2013 16:34:14 -0500 Subject: NFSv4: Update list of irrecoverable errors on DELEGRETURN If the DELEGRETURN errors out with something like NFS4ERR_BAD_STATEID then there is no recovery possible. Just quit without returning an error. Also, note that the client must not assume that the NFSv4 lease has been renewed when it sees an error on DELEGRETURN. Signed-off-by: Trond Myklebust Cc: stable@vger.kernel.org diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 1f4edfb..ca36d0d 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -4988,11 +4988,17 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); switch (task->tk_status) { - case -NFS4ERR_STALE_STATEID: - case -NFS4ERR_EXPIRED: case 0: renew_lease(data->res.server, data->timestamp); break; + case -NFS4ERR_ADMIN_REVOKED: + case -NFS4ERR_DELEG_REVOKED: + case -NFS4ERR_BAD_STATEID: + case -NFS4ERR_OLD_STATEID: + case -NFS4ERR_STALE_STATEID: + case -NFS4ERR_EXPIRED: + task->tk_status = 0; + break; default: if (nfs4_async_handle_error(task, data->res.server, NULL) == -EAGAIN) { -- cgit v0.10.2 From 69794ad70cd3b600319f175fc0cbe7abd510791f Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 20 Nov 2013 12:57:19 -0500 Subject: NFSv4: close needs to handle NFS4ERR_ADMIN_REVOKED Also ensure that we zero out the stateid mode when exiting Signed-off-by: Trond Myklebust diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index ca36d0d..f01e2aa 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2518,9 +2518,8 @@ static void nfs4_close_done(struct rpc_task *task, void *data) calldata->roc_barrier); nfs_set_open_stateid(state, &calldata->res.stateid, 0); renew_lease(server, calldata->timestamp); - nfs4_close_clear_stateid_flags(state, - calldata->arg.fmode); break; + case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_OLD_STATEID: case -NFS4ERR_BAD_STATEID: @@ -2528,9 +2527,13 @@ static void nfs4_close_done(struct rpc_task *task, void *data) if (calldata->arg.fmode == 0) break; default: - if (nfs4_async_handle_error(task, server, state) == -EAGAIN) + if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { rpc_restart_call_prepare(task); + goto out_release; + } } + nfs4_close_clear_stateid_flags(state, calldata->arg.fmode); +out_release: nfs_release_seqid(calldata->arg.seqid); nfs_refresh_inode(calldata->inode, calldata->res.fattr); dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); -- cgit v0.10.2 From c297c8b99b07f496ff69a719cfb8e8fe852832ed Mon Sep 17 00:00:00 2001 From: Andy Adamson Date: Wed, 20 Nov 2013 13:00:17 -0500 Subject: SUNRPC: do not fail gss proc NULL calls with EACCES Otherwise RPCSEC_GSS_DESTROY messages are not sent. Signed-off-by: Andy Adamson Signed-off-by: Trond Myklebust diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c index 97912b4..42fdfc6 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -1517,7 +1517,7 @@ out: static int gss_refresh_null(struct rpc_task *task) { - return -EACCES; + return 0; } static __be32 * -- cgit v0.10.2 From f22e5edd2244609aed3906207a62223e7707a34d Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 4 Dec 2013 12:09:45 -0500 Subject: NFSv4.1: Prevent a 3-way deadlock between layoutreturn, open and state recovery Andy Adamson reports: The state manager is recovering expired state and recovery OPENs are being processed. If kswapd is pruning inodes at the same time, a deadlock can occur when kswapd calls evict_inode on an NFSv4.1 inode with a layout, and the resultant layoutreturn gets an error that the state mangager is to handle, causing the layoutreturn to wait on the (NFS client) cl_rpcwaitq. At the same time an open is waiting for the inode deletion to complete in __wait_on_freeing_inode. If the open is either the open called by the state manager, or an open from the same open owner that is holding the NFSv4 sequence id which causes the OPEN from the state manager to wait for the sequence id on the Seqid_waitqueue, then the state is deadlocked with kswapd. The fix is simply to have layoutreturn ignore all errors except NFS4ERR_DELAY. We already know that layouts are dropped on all server reboots, and that it has to be coded to deal with the "forgetful client model" that doesn't send layoutreturns. Reported-by: Andy Adamson Link: http://lkml.kernel.org/r/1385402270-14284-1-git-send-email-andros@netapp.com Signed-off-by: Trond Myklebust diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index f01e2aa..e040359 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -7599,7 +7599,14 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) return; server = NFS_SERVER(lrp->args.inode); - if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { + switch (task->tk_status) { + default: + task->tk_status = 0; + case 0: + break; + case -NFS4ERR_DELAY: + if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN) + break; rpc_restart_call_prepare(task); return; } -- cgit v0.10.2 From cd7b996aa6cafe520dd987b12694fd8af4278466 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 4 Dec 2013 12:29:49 -0500 Subject: MAINTAINERS: Update contact information for Trond Myklebust Signed-off-by: Trond Myklebust diff --git a/MAINTAINERS b/MAINTAINERS index d2d2f45..cfe3926 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5878,10 +5878,10 @@ F: drivers/nfc/ F: include/linux/platform_data/pn544.h NFS, SUNRPC, AND LOCKD CLIENTS -M: Trond Myklebust +M: Trond Myklebust L: linux-nfs@vger.kernel.org W: http://client.linux-nfs.org -T: git git://git.linux-nfs.org/pub/linux/nfs-2.6.git +T: git git://git.linux-nfs.org/projects/trondmy/linux-nfs.git S: Maintained F: fs/lockd/ F: fs/nfs/ -- cgit v0.10.2 From 3873d064b8538686bbbd4b858dc8a07db1f7f43a Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Mon, 2 Dec 2013 19:59:31 +0100 Subject: nfs: fix do_div() warning by instead using sector_div() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When compiling a 32bit kernel with CONFIG_LBDAF=n the compiler complains like shown below. Fix this warning by instead using sector_div() which is provided by the kernel.h header file. fs/nfs/blocklayout/extents.c: In function ‘normalize’: include/asm-generic/div64.h:43:28: warning: comparison of distinct pointer types lacks a cast [enabled by default] fs/nfs/blocklayout/extents.c:47:13: note: in expansion of macro ‘do_div’ nfs/blocklayout/extents.c:47:2: warning: right shift count >= width of type [enabled by default] fs/nfs/blocklayout/extents.c:47:2: warning: passing argument 1 of ‘__div64_32’ from incompatible pointer type [enabled by default] include/asm-generic/div64.h:35:17: note: expected ‘uint64_t *’ but argument is of type ‘sector_t *’ extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor); Signed-off-by: Helge Deller Signed-off-by: Trond Myklebust diff --git a/fs/nfs/blocklayout/extents.c b/fs/nfs/blocklayout/extents.c index 9c3e117..4d01614 100644 --- a/fs/nfs/blocklayout/extents.c +++ b/fs/nfs/blocklayout/extents.c @@ -44,7 +44,7 @@ static inline sector_t normalize(sector_t s, int base) { sector_t tmp = s; /* Since do_div modifies its argument */ - return s - do_div(tmp, base); + return s - sector_div(tmp, base); } static inline sector_t normalize_up(sector_t s, int base) -- cgit v0.10.2