From 718360c59f34b80d9878429300c1c688f7c2031d Mon Sep 17 00:00:00 2001 From: Noah Massey Date: Thu, 30 Jan 2014 21:31:12 -0500 Subject: nfs: fix setting of ACLs on file creation. nfs3_get_acl() tries to skip posix equivalent ACLs, but misinterprets the return value of posix_acl_equiv_mode(). Fix it. This is a regression introduced by "nfs: use generic posix ACL infrastructure for v3 Posix ACLs" CC: Christoph Hellwig CC: linux-nfs@vger.kernel.org CC: linux-fsdevel@vger.kernel.org Signed-off-by: Trond Myklebust --- fs/nfs/nfs3acl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c index 9a5ca03fa53..0851f852568 100644 --- a/fs/nfs/nfs3acl.c +++ b/fs/nfs/nfs3acl.c @@ -80,7 +80,7 @@ struct posix_acl *nfs3_get_acl(struct inode *inode, int type) } if (res.acl_access != NULL) { - if (posix_acl_equiv_mode(res.acl_access, NULL) || + if ((posix_acl_equiv_mode(res.acl_access, NULL) == 0) || res.acl_access->a_count == 0) { posix_acl_release(res.acl_access); res.acl_access = NULL; -- cgit v1.2.3-70-g09d2 From 17ead6c85c3d0ef57a14d1373f1f1cee2ce60ea8 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 1 Feb 2014 14:53:23 -0500 Subject: NFSv4: Fix memory corruption in nfs4_proc_open_confirm nfs41_wake_and_assign_slot() relies on the task->tk_msg.rpc_argp and task->tk_msg.rpc_resp always pointing to the session sequence arguments. nfs4_proc_open_confirm tries to pull a fast one by reusing the open sequence structure, thus causing corruption of the NFSv4 slot table. Cc: stable@vger.kernel.org # 3.12+ Signed-off-by: Trond Myklebust --- fs/nfs/nfs4proc.c | 8 ++++---- include/linux/nfs_xdr.h | 2 ++ 2 files changed, 6 insertions(+), 4 deletions(-) (limited to 'fs') diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 42da6af7758..2da6a698b8f 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1620,15 +1620,15 @@ static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) { struct nfs4_opendata *data = calldata; - nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args, - &data->o_res.seq_res, task); + nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args, + &data->c_res.seq_res, task); } static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) { struct nfs4_opendata *data = calldata; - nfs40_sequence_done(task, &data->o_res.seq_res); + nfs40_sequence_done(task, &data->c_res.seq_res); data->rpc_status = task->tk_status; if (data->rpc_status == 0) { @@ -1686,7 +1686,7 @@ static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) }; int status; - nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1); + nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1); kref_get(&data->kref); data->rpc_done = 0; data->rpc_status = 0; diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 3ccfcecf899..b2fb167b2e6 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -379,12 +379,14 @@ struct nfs_openres { * Arguments to the open_confirm call. */ struct nfs_open_confirmargs { + struct nfs4_sequence_args seq_args; const struct nfs_fh * fh; nfs4_stateid * stateid; struct nfs_seqid * seqid; }; struct nfs_open_confirmres { + struct nfs4_sequence_res seq_res; nfs4_stateid stateid; struct nfs_seqid * seqid; }; -- cgit v1.2.3-70-g09d2 From 20b9a9024540a775395d5d1f41eec0ec6ec41f9b Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 1 Feb 2014 13:47:06 -0500 Subject: NFSv4.1: nfs4_destroy_session must call rpc_destroy_waitqueue There may still be timers active on the session waitqueues. Make sure that we kill them before freeing the memory. Cc: stable@vger.kernel.org # 3.12+ Signed-off-by: Trond Myklebust --- fs/nfs/nfs4client.c | 2 +- fs/nfs/nfs4session.c | 25 ++++++++++++++++++++----- fs/nfs/nfs4session.h | 2 +- 3 files changed, 22 insertions(+), 7 deletions(-) (limited to 'fs') diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index dbb3e1f30c6..860ad26a559 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -170,7 +170,7 @@ void nfs41_shutdown_client(struct nfs_client *clp) void nfs40_shutdown_client(struct nfs_client *clp) { if (clp->cl_slot_tbl) { - nfs4_release_slot_table(clp->cl_slot_tbl); + nfs4_shutdown_slot_table(clp->cl_slot_tbl); kfree(clp->cl_slot_tbl); } } diff --git a/fs/nfs/nfs4session.c b/fs/nfs/nfs4session.c index cf883c7ae05..e799dc3c3b1 100644 --- a/fs/nfs/nfs4session.c +++ b/fs/nfs/nfs4session.c @@ -231,14 +231,23 @@ out: return ret; } +/* + * nfs4_release_slot_table - release all slot table entries + */ +static void nfs4_release_slot_table(struct nfs4_slot_table *tbl) +{ + nfs4_shrink_slot_table(tbl, 0); +} + /** - * nfs4_release_slot_table - release resources attached to a slot table + * nfs4_shutdown_slot_table - release resources attached to a slot table * @tbl: slot table to shut down * */ -void nfs4_release_slot_table(struct nfs4_slot_table *tbl) +void nfs4_shutdown_slot_table(struct nfs4_slot_table *tbl) { - nfs4_shrink_slot_table(tbl, 0); + nfs4_release_slot_table(tbl); + rpc_destroy_wait_queue(&tbl->slot_tbl_waitq); } /** @@ -422,7 +431,7 @@ void nfs41_update_target_slotid(struct nfs4_slot_table *tbl, spin_unlock(&tbl->slot_tbl_lock); } -static void nfs4_destroy_session_slot_tables(struct nfs4_session *session) +static void nfs4_release_session_slot_tables(struct nfs4_session *session) { nfs4_release_slot_table(&session->fc_slot_table); nfs4_release_slot_table(&session->bc_slot_table); @@ -450,7 +459,7 @@ int nfs4_setup_session_slot_tables(struct nfs4_session *ses) if (status && tbl->slots == NULL) /* Fore and back channel share a connection so get * both slot tables or neither */ - nfs4_destroy_session_slot_tables(ses); + nfs4_release_session_slot_tables(ses); return status; } @@ -470,6 +479,12 @@ struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) return session; } +static void nfs4_destroy_session_slot_tables(struct nfs4_session *session) +{ + nfs4_shutdown_slot_table(&session->fc_slot_table); + nfs4_shutdown_slot_table(&session->bc_slot_table); +} + void nfs4_destroy_session(struct nfs4_session *session) { struct rpc_xprt *xprt; diff --git a/fs/nfs/nfs4session.h b/fs/nfs/nfs4session.h index 23230610065..b34ada9bc6a 100644 --- a/fs/nfs/nfs4session.h +++ b/fs/nfs/nfs4session.h @@ -74,7 +74,7 @@ enum nfs4_session_state { extern int nfs4_setup_slot_table(struct nfs4_slot_table *tbl, unsigned int max_reqs, const char *queue); -extern void nfs4_release_slot_table(struct nfs4_slot_table *tbl); +extern void nfs4_shutdown_slot_table(struct nfs4_slot_table *tbl); extern struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl); extern void nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot); extern void nfs4_slot_tbl_drain_complete(struct nfs4_slot_table *tbl); -- cgit v1.2.3-70-g09d2 From d4c42fb493e018e9240810bb6dc5334ae0505145 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 2 Feb 2014 14:41:42 -0500 Subject: NFSv3: Remove unused function nfs3_proc_set_default_acl Cc: Christoph Hellwig Signed-off-by: Trond Myklebust --- fs/nfs/nfs3acl.c | 19 ------------------- 1 file changed, 19 deletions(-) (limited to 'fs') diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c index 0851f852568..9271a6bb9a4 100644 --- a/fs/nfs/nfs3acl.c +++ b/fs/nfs/nfs3acl.c @@ -233,25 +233,6 @@ fail: return PTR_ERR(alloc); } -int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, - umode_t mode) -{ - struct posix_acl *default_acl, *acl; - int error; - - error = posix_acl_create(dir, &mode, &default_acl, &acl); - if (error) - return (error == -EOPNOTSUPP) ? 0 : error; - - error = nfs3_proc_setacls(inode, acl, default_acl); - - if (acl) - posix_acl_release(acl); - if (default_acl) - posix_acl_release(default_acl); - return error; -} - const struct xattr_handler *nfs3_xattr_handlers[] = { &posix_acl_access_xattr_handler, &posix_acl_default_xattr_handler, -- cgit v1.2.3-70-g09d2 From 8f493b9cfcd8941c6b27d6ce8e3b4a78c094b3c1 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 2 Feb 2014 14:36:42 -0500 Subject: NFSv3: Fix return value of nfs3_proc_setacls nfs3_proc_setacls is used internally by the NFSv3 create operations to set the acl after the file has been created. If the operation fails because the server doesn't support acls, then it must return '0', not -EOPNOTSUPP. Reported-by: Russell King Link: http://lkml.kernel.org/r/20140201010328.GI15937@n2100.arm.linux.org.uk Cc: Christoph Hellwig Tested-by: Takashi Iwai Signed-off-by: Trond Myklebust --- fs/nfs/nfs3acl.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c index 9271a6bb9a4..871d6eda8db 100644 --- a/fs/nfs/nfs3acl.c +++ b/fs/nfs/nfs3acl.c @@ -113,7 +113,7 @@ getout: return ERR_PTR(status); } -int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, +static int __nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, struct posix_acl *dfacl) { struct nfs_server *server = NFS_SERVER(inode); @@ -198,6 +198,15 @@ out: return status; } +int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, + struct posix_acl *dfacl) +{ + int ret; + ret = __nfs3_proc_setacls(inode, acl, dfacl); + return (ret == -EOPNOTSUPP) ? 0 : ret; + +} + int nfs3_set_acl(struct inode *inode, struct posix_acl *acl, int type) { struct posix_acl *alloc = NULL, *dfacl = NULL; @@ -225,7 +234,7 @@ int nfs3_set_acl(struct inode *inode, struct posix_acl *acl, int type) if (IS_ERR(alloc)) goto fail; } - status = nfs3_proc_setacls(inode, acl, dfacl); + status = __nfs3_proc_setacls(inode, acl, dfacl); posix_acl_release(alloc); return status; -- cgit v1.2.3-70-g09d2 From 789b663ae3d427ea9c50505339a13276e7228c9d Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Fri, 31 Jan 2014 14:25:19 -0500 Subject: fs: get_acl() must be allowed to return EOPNOTSUPP posix_acl_xattr_get requires get_acl() to return EOPNOTSUPP if the filesystem cannot support acls. This is needed for NFS, which can't know whether or not the server supports acls until it tries to get/set one. This patch converts posix_acl_chmod and posix_acl_create to deal with EOPNOTSUPP return values from get_acl(). Reported-by: Russell King Link: http://lkml.kernel.org/r/20140130140834.GW15937@n2100.arm.linux.org.uk Cc: Al Viro viro@zeniv.linux.org.uk> Reviewed-by: Christoph Hellwig Tested-by: Takashi Iwai Signed-off-by: Trond Myklebust --- fs/posix_acl.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) (limited to 'fs') diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 38bae5a0ea2..11c54fd51e1 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -521,8 +521,11 @@ posix_acl_chmod(struct inode *inode, umode_t mode) return -EOPNOTSUPP; acl = get_acl(inode, ACL_TYPE_ACCESS); - if (IS_ERR_OR_NULL(acl)) + if (IS_ERR_OR_NULL(acl)) { + if (acl == ERR_PTR(-EOPNOTSUPP)) + return 0; return PTR_ERR(acl); + } ret = __posix_acl_chmod(&acl, GFP_KERNEL, mode); if (ret) @@ -544,14 +547,15 @@ posix_acl_create(struct inode *dir, umode_t *mode, goto no_acl; p = get_acl(dir, ACL_TYPE_DEFAULT); - if (IS_ERR(p)) + if (IS_ERR(p)) { + if (p == ERR_PTR(-EOPNOTSUPP)) + goto apply_umask; return PTR_ERR(p); - - if (!p) { - *mode &= ~current_umask(); - goto no_acl; } + if (!p) + goto apply_umask; + *acl = posix_acl_clone(p, GFP_NOFS); if (!*acl) return -ENOMEM; @@ -575,6 +579,8 @@ posix_acl_create(struct inode *dir, umode_t *mode, } return 0; +apply_umask: + *mode &= ~current_umask(); no_acl: *default_acl = NULL; *acl = NULL; -- cgit v1.2.3-70-g09d2