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fs/nfsd/nfs4recover.c
50.3 KB
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/* |
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* Copyright (c) 2004 The Regents of the University of Michigan. |
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* Copyright (c) 2012 Jeff Layton <jlayton@redhat.com> |
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* All rights reserved. * * Andy Adamson <andros@citi.umich.edu> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ |
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#include <crypto/hash.h> |
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#include <linux/file.h> |
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#include <linux/slab.h> |
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#include <linux/namei.h> |
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#include <linux/sched.h> |
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#include <linux/fs.h> |
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#include <linux/module.h> |
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#include <net/net_namespace.h> #include <linux/sunrpc/rpc_pipe_fs.h> #include <linux/sunrpc/clnt.h> #include <linux/nfsd/cld.h> |
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#include "nfsd.h" #include "state.h" |
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#include "vfs.h" |
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#include "netns.h" |
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#define NFSDDBG_FACILITY NFSDDBG_PROC |
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/* Declarations */ struct nfsd4_client_tracking_ops { int (*init)(struct net *); void (*exit)(struct net *); void (*create)(struct nfs4_client *); void (*remove)(struct nfs4_client *); int (*check)(struct nfs4_client *); |
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void (*grace_done)(struct nfsd_net *); |
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uint8_t version; size_t msglen; |
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}; |
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static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops; |
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static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v2; |
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|
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/* Globals */ |
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static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
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|
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static int nfs4_save_creds(const struct cred **original_creds) |
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{ |
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struct cred *new; new = prepare_creds(); if (!new) return -ENOMEM; |
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new->fsuid = GLOBAL_ROOT_UID; new->fsgid = GLOBAL_ROOT_GID; |
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*original_creds = override_creds(new); put_cred(new); return 0; |
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} static void |
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nfs4_reset_creds(const struct cred *original) |
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{ |
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revert_creds(original); |
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} |
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static void md5_to_hex(char *out, char *md5) { int i; for (i=0; i<16; i++) { unsigned char c = md5[i]; *out++ = '0' + ((c&0xf0)>>4) + (c>=0xa0)*('a'-'9'-1); *out++ = '0' + (c&0x0f) + ((c&0x0f)>=0x0a)*('a'-'9'-1); } *out = '\0'; } |
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static int nfs4_make_rec_clidname(char *dname, const struct xdr_netobj *clname) |
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{ struct xdr_netobj cksum; |
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struct crypto_shash *tfm; |
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int status; |
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dprintk("NFSD: nfs4_make_rec_clidname for %.*s ", clname->len, clname->data); |
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tfm = crypto_alloc_shash("md5", 0, 0); if (IS_ERR(tfm)) { status = PTR_ERR(tfm); |
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goto out_no_tfm; |
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} |
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cksum.len = crypto_shash_digestsize(tfm); |
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cksum.data = kmalloc(cksum.len, GFP_KERNEL); |
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if (cksum.data == NULL) { status = -ENOMEM; |
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goto out; |
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} |
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|
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status = crypto_shash_tfm_digest(tfm, clname->data, clname->len, cksum.data); |
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if (status) |
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goto out; |
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md5_to_hex(dname, cksum.data); |
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status = 0; |
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out: |
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kfree(cksum.data); |
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crypto_free_shash(tfm); |
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out_no_tfm: |
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return status; } |
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|
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/* * If we had an error generating the recdir name for the legacy tracker * then warn the admin. If the error doesn't appear to be transient, * then disable recovery tracking. */ static void |
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legacy_recdir_name_error(struct nfs4_client *clp, int error) |
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{ printk(KERN_ERR "NFSD: unable to generate recoverydir " "name (%d). ", error); /* * if the algorithm just doesn't exist, then disable the recovery * tracker altogether. The crypto libs will generally return this if * FIPS is enabled as well. */ if (error == -ENOENT) { printk(KERN_ERR "NFSD: disabling legacy clientid tracking. " "Reboot recovery will not function correctly! "); |
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nfsd4_client_tracking_exit(clp->net); |
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} } |
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static void |
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__nfsd4_create_reclaim_record_grace(struct nfs4_client *clp, const char *dname, int len, struct nfsd_net *nn) { struct xdr_netobj name; |
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struct xdr_netobj princhash = { .len = 0, .data = NULL }; |
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struct nfs4_client_reclaim *crp; name.data = kmemdup(dname, len, GFP_KERNEL); if (!name.data) { dprintk("%s: failed to allocate memory for name.data! ", __func__); return; } name.len = len; |
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crp = nfs4_client_to_reclaim(name, princhash, nn); |
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if (!crp) { kfree(name.data); return; } crp->cr_clp = clp; } static void |
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nfsd4_create_clid_dir(struct nfs4_client *clp) |
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{ |
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const struct cred *original_cred; |
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char dname[HEXDIR_LEN]; |
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struct dentry *dir, *dentry; |
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int status; |
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struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
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|
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if (test_and_set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) |
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return; |
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if (!nn->rec_file) |
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return; |
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status = nfs4_make_rec_clidname(dname, &clp->cl_name); if (status) |
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return legacy_recdir_name_error(clp, status); |
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|
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status = nfs4_save_creds(&original_cred); if (status < 0) |
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return; |
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|
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status = mnt_want_write_file(nn->rec_file); |
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if (status) |
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goto out_creds; |
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|
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dir = nn->rec_file->f_path.dentry; |
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/* lock the parent */ |
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inode_lock(d_inode(dir)); |
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|
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dentry = lookup_one_len(dname, dir, HEXDIR_LEN-1); |
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if (IS_ERR(dentry)) { status = PTR_ERR(dentry); goto out_unlock; } |
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if (d_really_is_positive(dentry)) |
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/* * In the 4.1 case, where we're called from * reclaim_complete(), records from the previous reboot * may still be left, so this is OK. * * In the 4.0 case, we should never get here; but we may * as well be forgiving and just succeed silently. */ |
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goto out_put; |
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status = vfs_mkdir(d_inode(dir), dentry, S_IRWXU); |
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out_put: dput(dentry); out_unlock: |
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inode_unlock(d_inode(dir)); |
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if (status == 0) { |
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if (nn->in_grace) __nfsd4_create_reclaim_record_grace(clp, dname, HEXDIR_LEN, nn); |
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vfs_fsync(nn->rec_file, 0); |
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} else { |
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printk(KERN_ERR "NFSD: failed to write recovery record" " (err %d); please check that %s exists" " and is writeable", status, user_recovery_dirname); |
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} |
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mnt_drop_write_file(nn->rec_file); |
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out_creds: |
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nfs4_reset_creds(original_cred); |
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} |
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typedef int (recdir_func)(struct dentry *, struct dentry *, struct nfsd_net *); |
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|
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struct name_list { char name[HEXDIR_LEN]; |
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struct list_head list; }; |
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struct nfs4_dir_ctx { struct dir_context ctx; struct list_head names; }; |
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static int |
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nfsd4_build_namelist(struct dir_context *__ctx, const char *name, int namlen, |
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loff_t offset, u64 ino, unsigned int d_type) |
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{ |
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struct nfs4_dir_ctx *ctx = container_of(__ctx, struct nfs4_dir_ctx, ctx); |
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struct name_list *entry; |
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|
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if (namlen != HEXDIR_LEN - 1) |
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return 0; |
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entry = kmalloc(sizeof(struct name_list), GFP_KERNEL); if (entry == NULL) |
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return -ENOMEM; |
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memcpy(entry->name, name, HEXDIR_LEN - 1); entry->name[HEXDIR_LEN - 1] = '\0'; |
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list_add(&entry->list, &ctx->names); |
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return 0; } static int |
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nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn) |
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{ |
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const struct cred *original_cred; |
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struct dentry *dir = nn->rec_file->f_path.dentry; |
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struct nfs4_dir_ctx ctx = { .ctx.actor = nfsd4_build_namelist, .names = LIST_HEAD_INIT(ctx.names) }; |
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struct name_list *entry, *tmp; |
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int status; |
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status = nfs4_save_creds(&original_cred); if (status < 0) return status; |
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|
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status = vfs_llseek(nn->rec_file, 0, SEEK_SET); |
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if (status < 0) { nfs4_reset_creds(original_cred); return status; } |
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status = iterate_dir(nn->rec_file, &ctx.ctx); |
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inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); |
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list_for_each_entry_safe(entry, tmp, &ctx.names, list) { |
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if (!status) { struct dentry *dentry; dentry = lookup_one_len(entry->name, dir, HEXDIR_LEN-1); if (IS_ERR(dentry)) { status = PTR_ERR(dentry); break; } |
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status = f(dir, dentry, nn); |
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dput(dentry); |
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} |
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list_del(&entry->list); kfree(entry); |
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} |
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inode_unlock(d_inode(dir)); |
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nfs4_reset_creds(original_cred); |
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list_for_each_entry_safe(entry, tmp, &ctx.names, list) { dprintk("NFSD: %s. Left entry %s ", __func__, entry->name); list_del(&entry->list); kfree(entry); } |
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return status; } static int |
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nfsd4_unlink_clid_dir(char *name, int namlen, struct nfsd_net *nn) |
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{ |
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struct dentry *dir, *dentry; |
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int status; dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s ", namlen, name); |
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dir = nn->rec_file->f_path.dentry; |
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inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); |
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dentry = lookup_one_len(name, dir, namlen); |
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if (IS_ERR(dentry)) { status = PTR_ERR(dentry); |
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goto out_unlock; |
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} status = -ENOENT; |
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if (d_really_is_negative(dentry)) |
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goto out; |
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status = vfs_rmdir(d_inode(dir), dentry); |
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out: dput(dentry); |
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out_unlock: |
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inode_unlock(d_inode(dir)); |
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return status; } |
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static void |
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__nfsd4_remove_reclaim_record_grace(const char *dname, int len, struct nfsd_net *nn) { struct xdr_netobj name; struct nfs4_client_reclaim *crp; name.data = kmemdup(dname, len, GFP_KERNEL); if (!name.data) { dprintk("%s: failed to allocate memory for name.data! ", __func__); return; } name.len = len; crp = nfsd4_find_reclaim_client(name, nn); kfree(name.data); if (crp) nfs4_remove_reclaim_record(crp, nn); } static void |
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nfsd4_remove_clid_dir(struct nfs4_client *clp) { |
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const struct cred *original_cred; |
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char dname[HEXDIR_LEN]; |
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int status; |
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struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
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|
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if (!nn->rec_file || !test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) |
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return; |
2216d449a nfsd: get rid of ... |
385 386 |
status = nfs4_make_rec_clidname(dname, &clp->cl_name); if (status) |
7255e716b nfsd: fix oops wh... |
387 |
return legacy_recdir_name_error(clp, status); |
2216d449a nfsd: get rid of ... |
388 |
|
3a0733692 nfsd: recovery - ... |
389 |
status = mnt_want_write_file(nn->rec_file); |
0622753b8 [PATCH] r/o bind ... |
390 391 |
if (status) goto out; |
a52d726bb nfsd: convert nfs... |
392 |
clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
d84f4f992 CRED: Inaugurate ... |
393 394 395 |
status = nfs4_save_creds(&original_cred); if (status < 0) |
698d8d875 nfsd: fix error h... |
396 |
goto out_drop_write; |
d84f4f992 CRED: Inaugurate ... |
397 |
|
3a0733692 nfsd: recovery - ... |
398 |
status = nfsd4_unlink_clid_dir(dname, HEXDIR_LEN-1, nn); |
d84f4f992 CRED: Inaugurate ... |
399 |
nfs4_reset_creds(original_cred); |
0ce0c2b5d nfsd: don't searc... |
400 |
if (status == 0) { |
3a0733692 nfsd: recovery - ... |
401 |
vfs_fsync(nn->rec_file, 0); |
6b1891052 nfsd: make nfs4_c... |
402 403 404 |
if (nn->in_grace) __nfsd4_remove_reclaim_record_grace(dname, HEXDIR_LEN, nn); |
0ce0c2b5d nfsd: don't searc... |
405 |
} |
698d8d875 nfsd: fix error h... |
406 |
out_drop_write: |
3a0733692 nfsd: recovery - ... |
407 |
mnt_drop_write_file(nn->rec_file); |
0622753b8 [PATCH] r/o bind ... |
408 |
out: |
c7b9a4592 [PATCH] knfsd: nf... |
409 410 |
if (status) printk("NFSD: Failed to remove expired client state directory" |
2216d449a nfsd: get rid of ... |
411 412 |
" %.*s ", HEXDIR_LEN, dname); |
c7b9a4592 [PATCH] knfsd: nf... |
413 414 415 |
} static int |
52e19c09a nfsd: make reclai... |
416 |
purge_old(struct dentry *parent, struct dentry *child, struct nfsd_net *nn) |
c7b9a4592 [PATCH] knfsd: nf... |
417 418 |
{ int status; |
6b1891052 nfsd: make nfs4_c... |
419 |
struct xdr_netobj name; |
c7b9a4592 [PATCH] knfsd: nf... |
420 |
|
6b1891052 nfsd: make nfs4_c... |
421 422 423 424 425 |
if (child->d_name.len != HEXDIR_LEN - 1) { printk("%s: illegal name %pd in recovery directory ", __func__, child); /* Keep trying; maybe the others are OK: */ |
b37ad28bc [PATCH] nfsd: nfs... |
426 |
return 0; |
6b1891052 nfsd: make nfs4_c... |
427 428 429 430 431 432 433 434 435 436 437 |
} name.data = kmemdup_nul(child->d_name.name, child->d_name.len, GFP_KERNEL); if (!name.data) { dprintk("%s: failed to allocate memory for name.data! ", __func__); goto out; } name.len = HEXDIR_LEN; if (nfs4_has_reclaimed_state(name, nn)) goto out_free; |
c7b9a4592 [PATCH] knfsd: nf... |
438 |
|
2b0143b5c VFS: normal files... |
439 |
status = vfs_rmdir(d_inode(parent), child); |
c7b9a4592 [PATCH] knfsd: nf... |
440 |
if (status) |
a6a9f18f0 nfsd: switch to %... |
441 442 443 |
printk("failed to remove client recovery directory %pd ", child); |
6b1891052 nfsd: make nfs4_c... |
444 445 446 |
out_free: kfree(name.data); out: |
c7b9a4592 [PATCH] knfsd: nf... |
447 |
/* Keep trying, success or failure: */ |
b37ad28bc [PATCH] nfsd: nfs... |
448 |
return 0; |
c7b9a4592 [PATCH] knfsd: nf... |
449 |
} |
2a4317c55 nfsd: add nfsd4_c... |
450 |
static void |
919b8049f nfsd: remove redu... |
451 |
nfsd4_recdir_purge_old(struct nfsd_net *nn) |
2a4317c55 nfsd: add nfsd4_c... |
452 |
{ |
c7b9a4592 [PATCH] knfsd: nf... |
453 |
int status; |
f141f79d7 nfsd: recovery - ... |
454 |
nn->in_grace = false; |
3a0733692 nfsd: recovery - ... |
455 |
if (!nn->rec_file) |
c7b9a4592 [PATCH] knfsd: nf... |
456 |
return; |
3a0733692 nfsd: recovery - ... |
457 |
status = mnt_want_write_file(nn->rec_file); |
0622753b8 [PATCH] r/o bind ... |
458 459 |
if (status) goto out; |
52e19c09a nfsd: make reclai... |
460 |
status = nfsd4_list_rec_dir(purge_old, nn); |
c7b9a4592 [PATCH] knfsd: nf... |
461 |
if (status == 0) |
3a0733692 nfsd: recovery - ... |
462 463 |
vfs_fsync(nn->rec_file, 0); mnt_drop_write_file(nn->rec_file); |
0622753b8 [PATCH] r/o bind ... |
464 |
out: |
52e19c09a nfsd: make reclai... |
465 |
nfs4_release_reclaim(nn); |
c7b9a4592 [PATCH] knfsd: nf... |
466 467 |
if (status) printk("nfsd4: failed to purge old clients from recovery" |
a6a9f18f0 nfsd: switch to %... |
468 469 |
" directory %pD ", nn->rec_file); |
c7b9a4592 [PATCH] knfsd: nf... |
470 471 472 |
} static int |
52e19c09a nfsd: make reclai... |
473 |
load_recdir(struct dentry *parent, struct dentry *child, struct nfsd_net *nn) |
190e4fbf9 [PATCH] knfsd: nf... |
474 |
{ |
6b1891052 nfsd: make nfs4_c... |
475 |
struct xdr_netobj name; |
6ee95d1c8 nfsd: add support... |
476 |
struct xdr_netobj princhash = { .len = 0, .data = NULL }; |
6b1891052 nfsd: make nfs4_c... |
477 |
|
190e4fbf9 [PATCH] knfsd: nf... |
478 |
if (child->d_name.len != HEXDIR_LEN - 1) { |
6b1891052 nfsd: make nfs4_c... |
479 480 481 |
printk("%s: illegal name %pd in recovery directory ", __func__, child); |
190e4fbf9 [PATCH] knfsd: nf... |
482 |
/* Keep trying; maybe the others are OK: */ |
b37ad28bc [PATCH] nfsd: nfs... |
483 |
return 0; |
190e4fbf9 [PATCH] knfsd: nf... |
484 |
} |
6b1891052 nfsd: make nfs4_c... |
485 486 487 488 489 490 491 492 |
name.data = kmemdup_nul(child->d_name.name, child->d_name.len, GFP_KERNEL); if (!name.data) { dprintk("%s: failed to allocate memory for name.data! ", __func__); goto out; } name.len = HEXDIR_LEN; |
6ee95d1c8 nfsd: add support... |
493 |
if (!nfs4_client_to_reclaim(name, princhash, nn)) |
6b1891052 nfsd: make nfs4_c... |
494 495 |
kfree(name.data); out: |
b37ad28bc [PATCH] nfsd: nfs... |
496 |
return 0; |
190e4fbf9 [PATCH] knfsd: nf... |
497 |
} |
2a4317c55 nfsd: add nfsd4_c... |
498 |
static int |
52e19c09a nfsd: make reclai... |
499 |
nfsd4_recdir_load(struct net *net) { |
190e4fbf9 [PATCH] knfsd: nf... |
500 |
int status; |
52e19c09a nfsd: make reclai... |
501 |
struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
190e4fbf9 [PATCH] knfsd: nf... |
502 |
|
3a0733692 nfsd: recovery - ... |
503 |
if (!nn->rec_file) |
e970a573c nfsd: open a file... |
504 |
return 0; |
52e19c09a nfsd: make reclai... |
505 |
status = nfsd4_list_rec_dir(load_recdir, nn); |
190e4fbf9 [PATCH] knfsd: nf... |
506 507 |
if (status) printk("nfsd4: failed loading clients from recovery" |
a6a9f18f0 nfsd: switch to %... |
508 509 |
" directory %pD ", nn->rec_file); |
190e4fbf9 [PATCH] knfsd: nf... |
510 511 512 513 514 515 |
return status; } /* * Hold reference to the recovery directory. */ |
2a4317c55 nfsd: add nfsd4_c... |
516 |
static int |
3a0733692 nfsd: recovery - ... |
517 |
nfsd4_init_recdir(struct net *net) |
190e4fbf9 [PATCH] knfsd: nf... |
518 |
{ |
3a0733692 nfsd: recovery - ... |
519 |
struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
d84f4f992 CRED: Inaugurate ... |
520 521 |
const struct cred *original_cred; int status; |
190e4fbf9 [PATCH] knfsd: nf... |
522 523 524 |
printk("NFSD: Using %s as the NFSv4 state recovery directory ", |
48483bf23 nfsd4: simplify r... |
525 |
user_recovery_dirname); |
190e4fbf9 [PATCH] knfsd: nf... |
526 |
|
3a0733692 nfsd: recovery - ... |
527 |
BUG_ON(nn->rec_file); |
190e4fbf9 [PATCH] knfsd: nf... |
528 |
|
d84f4f992 CRED: Inaugurate ... |
529 530 531 532 533 534 |
status = nfs4_save_creds(&original_cred); if (status < 0) { printk("NFSD: Unable to change credentials to find recovery" " directory: error %d ", status); |
2a4317c55 nfsd: add nfsd4_c... |
535 |
return status; |
d84f4f992 CRED: Inaugurate ... |
536 |
} |
190e4fbf9 [PATCH] knfsd: nf... |
537 |
|
3a0733692 nfsd: recovery - ... |
538 539 |
nn->rec_file = filp_open(user_recovery_dirname, O_RDONLY | O_DIRECTORY, 0); if (IS_ERR(nn->rec_file)) { |
c2642ab05 [PATCH] nfsd4: re... |
540 541 |
printk("NFSD: unable to find recovery directory %s ", |
48483bf23 nfsd4: simplify r... |
542 |
user_recovery_dirname); |
3a0733692 nfsd: recovery - ... |
543 544 |
status = PTR_ERR(nn->rec_file); nn->rec_file = NULL; |
e970a573c nfsd: open a file... |
545 |
} |
190e4fbf9 [PATCH] knfsd: nf... |
546 |
|
d84f4f992 CRED: Inaugurate ... |
547 |
nfs4_reset_creds(original_cred); |
0ce0c2b5d nfsd: don't searc... |
548 |
if (!status) |
f141f79d7 nfsd: recovery - ... |
549 |
nn->in_grace = true; |
2a4317c55 nfsd: add nfsd4_c... |
550 |
return status; |
190e4fbf9 [PATCH] knfsd: nf... |
551 |
} |
15d176c19 NFSD: Fix a memor... |
552 553 554 555 556 557 558 559 560 561 |
static void nfsd4_shutdown_recdir(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); if (!nn->rec_file) return; fput(nn->rec_file); nn->rec_file = NULL; } |
52e19c09a nfsd: make reclai... |
562 563 564 565 566 567 |
static int nfs4_legacy_state_init(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); int i; |
6da2ec560 treewide: kmalloc... |
568 569 570 |
nn->reclaim_str_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, sizeof(struct list_head), GFP_KERNEL); |
52e19c09a nfsd: make reclai... |
571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 |
if (!nn->reclaim_str_hashtbl) return -ENOMEM; for (i = 0; i < CLIENT_HASH_SIZE; i++) INIT_LIST_HEAD(&nn->reclaim_str_hashtbl[i]); nn->reclaim_str_hashtbl_size = 0; return 0; } static void nfs4_legacy_state_shutdown(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); kfree(nn->reclaim_str_hashtbl); } |
2a4317c55 nfsd: add nfsd4_c... |
588 589 590 591 |
static int nfsd4_load_reboot_recovery_data(struct net *net) { int status; |
3a0733692 nfsd: recovery - ... |
592 |
status = nfsd4_init_recdir(net); |
52e19c09a nfsd: make reclai... |
593 |
if (status) |
15d176c19 NFSD: Fix a memor... |
594 595 596 597 598 |
return status; status = nfsd4_recdir_load(net); if (status) nfsd4_shutdown_recdir(net); |
52e19c09a nfsd: make reclai... |
599 600 601 602 603 604 605 |
return status; } static int nfsd4_legacy_tracking_init(struct net *net) { int status; |
cc27e0d40 nfsd: don't allow... |
606 607 |
/* XXX: The legacy code won't work in a container */ if (net != &init_net) { |
46cc8ba30 nfsd: don't WARN/... |
608 609 |
pr_warn("NFSD: attempt to initialize legacy client tracking in a container ignored. "); |
cc27e0d40 nfsd: don't allow... |
610 611 |
return -EINVAL; } |
52e19c09a nfsd: make reclai... |
612 |
status = nfs4_legacy_state_init(net); |
2a4317c55 nfsd: add nfsd4_c... |
613 |
if (status) |
52e19c09a nfsd: make reclai... |
614 615 616 617 618 |
return status; status = nfsd4_load_reboot_recovery_data(net); if (status) goto err; |
869216075 nfsd: re-order cl... |
619 620 |
printk("NFSD: Using legacy client tracking operations. "); |
52e19c09a nfsd: make reclai... |
621 622 623 624 |
return 0; err: nfs4_legacy_state_shutdown(net); |
2a4317c55 nfsd: add nfsd4_c... |
625 626 627 628 |
return status; } static void |
2a4317c55 nfsd: add nfsd4_c... |
629 630 |
nfsd4_legacy_tracking_exit(struct net *net) { |
52e19c09a nfsd: make reclai... |
631 632 633 |
struct nfsd_net *nn = net_generic(net, nfsd_net_id); nfs4_release_reclaim(nn); |
15d176c19 NFSD: Fix a memor... |
634 |
nfsd4_shutdown_recdir(net); |
52e19c09a nfsd: make reclai... |
635 |
nfs4_legacy_state_shutdown(net); |
2a4317c55 nfsd: add nfsd4_c... |
636 |
} |
48483bf23 nfsd4: simplify r... |
637 638 639 640 641 642 643 644 645 646 647 648 649 |
/* * Change the NFSv4 recovery directory to recdir. */ int nfs4_reset_recoverydir(char *recdir) { int status; struct path path; status = kern_path(recdir, LOOKUP_FOLLOW, &path); if (status) return status; status = -ENOTDIR; |
e36cb0b89 VFS: (Scripted) C... |
650 |
if (d_is_dir(path.dentry)) { |
48483bf23 nfsd4: simplify r... |
651 652 653 654 655 656 657 658 659 660 661 662 |
strcpy(user_recovery_dirname, recdir); status = 0; } path_put(&path); return status; } char * nfs4_recoverydir(void) { return user_recovery_dirname; } |
2a4317c55 nfsd: add nfsd4_c... |
663 664 665 666 |
static int nfsd4_check_legacy_client(struct nfs4_client *clp) { |
2216d449a nfsd: get rid of ... |
667 668 |
int status; char dname[HEXDIR_LEN]; |
0ce0c2b5d nfsd: don't searc... |
669 |
struct nfs4_client_reclaim *crp; |
52e19c09a nfsd: make reclai... |
670 |
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
6b1891052 nfsd: make nfs4_c... |
671 |
struct xdr_netobj name; |
0ce0c2b5d nfsd: don't searc... |
672 |
|
2a4317c55 nfsd: add nfsd4_c... |
673 674 675 |
/* did we already find that this client is stable? */ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return 0; |
2216d449a nfsd: get rid of ... |
676 677 |
status = nfs4_make_rec_clidname(dname, &clp->cl_name); if (status) { |
7255e716b nfsd: fix oops wh... |
678 |
legacy_recdir_name_error(clp, status); |
2216d449a nfsd: get rid of ... |
679 680 |
return status; } |
2a4317c55 nfsd: add nfsd4_c... |
681 |
/* look for it in the reclaim hashtable otherwise */ |
6b1891052 nfsd: make nfs4_c... |
682 683 684 685 686 687 688 689 690 691 |
name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL); if (!name.data) { dprintk("%s: failed to allocate memory for name.data! ", __func__); goto out_enoent; } name.len = HEXDIR_LEN; crp = nfsd4_find_reclaim_client(name, nn); kfree(name.data); |
0ce0c2b5d nfsd: don't searc... |
692 |
if (crp) { |
2a4317c55 nfsd: add nfsd4_c... |
693 |
set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
0ce0c2b5d nfsd: don't searc... |
694 |
crp->cr_clp = clp; |
2a4317c55 nfsd: add nfsd4_c... |
695 696 |
return 0; } |
6b1891052 nfsd: make nfs4_c... |
697 |
out_enoent: |
2a4317c55 nfsd: add nfsd4_c... |
698 699 |
return -ENOENT; } |
7c582e4fa nfsd: recover: co... |
700 |
static const struct nfsd4_client_tracking_ops nfsd4_legacy_tracking_ops = { |
52e19c09a nfsd: make reclai... |
701 |
.init = nfsd4_legacy_tracking_init, |
2a4317c55 nfsd: add nfsd4_c... |
702 703 704 705 706 |
.exit = nfsd4_legacy_tracking_exit, .create = nfsd4_create_clid_dir, .remove = nfsd4_remove_clid_dir, .check = nfsd4_check_legacy_client, .grace_done = nfsd4_recdir_purge_old, |
11a60d159 nfsd: add a "GetV... |
707 708 |
.version = 1, .msglen = 0, |
2a4317c55 nfsd: add nfsd4_c... |
709 |
}; |
f3f801486 nfsd: add the inf... |
710 711 712 713 714 715 716 717 718 719 |
/* Globals */ #define NFSD_PIPE_DIR "nfsd" #define NFSD_CLD_PIPE "cld" /* per-net-ns structure for holding cld upcall info */ struct cld_net { struct rpc_pipe *cn_pipe; spinlock_t cn_lock; struct list_head cn_list; unsigned int cn_xid; |
8a9f4f412 nfsd: handle lega... |
720 |
bool cn_has_legacy; |
6ee95d1c8 nfsd: add support... |
721 |
struct crypto_shash *cn_tfm; |
f3f801486 nfsd: add the inf... |
722 723 724 725 726 |
}; struct cld_upcall { struct list_head cu_list; struct cld_net *cu_net; |
b493fd31c nfsd: fix a warni... |
727 |
struct completion cu_done; |
11a60d159 nfsd: add a "GetV... |
728 729 730 |
union { struct cld_msg_hdr cu_hdr; struct cld_msg cu_msg; |
6ee95d1c8 nfsd: add support... |
731 |
struct cld_msg_v2 cu_msg_v2; |
11a60d159 nfsd: add a "GetV... |
732 |
} cu_u; |
f3f801486 nfsd: add the inf... |
733 734 735 |
}; static int |
df60446cd nfsd: avoid a NUL... |
736 |
__cld_pipe_upcall(struct rpc_pipe *pipe, void *cmsg, struct nfsd_net *nn) |
f3f801486 nfsd: add the inf... |
737 738 739 |
{ int ret; struct rpc_pipe_msg msg; |
11a60d159 nfsd: add a "GetV... |
740 |
struct cld_upcall *cup = container_of(cmsg, struct cld_upcall, cu_u); |
f3f801486 nfsd: add the inf... |
741 742 743 |
memset(&msg, 0, sizeof(msg)); msg.data = cmsg; |
11a60d159 nfsd: add a "GetV... |
744 |
msg.len = nn->client_tracking_ops->msglen; |
f3f801486 nfsd: add the inf... |
745 |
|
f3f801486 nfsd: add the inf... |
746 747 |
ret = rpc_queue_upcall(pipe, &msg); if (ret < 0) { |
f3f801486 nfsd: add the inf... |
748 749 |
goto out; } |
b493fd31c nfsd: fix a warni... |
750 |
wait_for_completion(&cup->cu_done); |
f3f801486 nfsd: add the inf... |
751 752 753 754 755 756 757 758 |
if (msg.errno < 0) ret = msg.errno; out: return ret; } static int |
df60446cd nfsd: avoid a NUL... |
759 |
cld_pipe_upcall(struct rpc_pipe *pipe, void *cmsg, struct nfsd_net *nn) |
f3f801486 nfsd: add the inf... |
760 761 762 763 764 765 766 767 |
{ int ret; /* * -EAGAIN occurs when pipe is closed and reopened while there are * upcalls queued. */ do { |
df60446cd nfsd: avoid a NUL... |
768 |
ret = __cld_pipe_upcall(pipe, cmsg, nn); |
f3f801486 nfsd: add the inf... |
769 770 771 772 773 774 |
} while (ret == -EAGAIN); return ret; } static ssize_t |
6ee95d1c8 nfsd: add support... |
775 |
__cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg, |
74725959c nfsd: un-deprecat... |
776 777 |
struct nfsd_net *nn) { |
6ee95d1c8 nfsd: add support... |
778 779 |
uint8_t cmd, princhashlen; struct xdr_netobj name, princhash = { .len = 0, .data = NULL }; |
74725959c nfsd: un-deprecat... |
780 |
uint16_t namelen; |
8a9f4f412 nfsd: handle lega... |
781 |
struct cld_net *cn = nn->cld_net; |
74725959c nfsd: un-deprecat... |
782 783 784 785 786 787 |
if (get_user(cmd, &cmsg->cm_cmd)) { dprintk("%s: error when copying cmd from userspace", __func__); return -EFAULT; } if (cmd == Cld_GraceStart) { |
6ee95d1c8 nfsd: add support... |
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 |
if (nn->client_tracking_ops->version >= 2) { const struct cld_clntinfo __user *ci; ci = &cmsg->cm_u.cm_clntinfo; if (get_user(namelen, &ci->cc_name.cn_len)) return -EFAULT; name.data = memdup_user(&ci->cc_name.cn_id, namelen); if (IS_ERR_OR_NULL(name.data)) return -EFAULT; name.len = namelen; get_user(princhashlen, &ci->cc_princhash.cp_len); if (princhashlen > 0) { princhash.data = memdup_user( &ci->cc_princhash.cp_data, princhashlen); if (IS_ERR_OR_NULL(princhash.data)) return -EFAULT; princhash.len = princhashlen; } else princhash.len = 0; } else { const struct cld_name __user *cnm; cnm = &cmsg->cm_u.cm_name; if (get_user(namelen, &cnm->cn_len)) return -EFAULT; name.data = memdup_user(&cnm->cn_id, namelen); if (IS_ERR_OR_NULL(name.data)) return -EFAULT; name.len = namelen; } |
8a9f4f412 nfsd: handle lega... |
819 820 821 822 823 |
if (name.len > 5 && memcmp(name.data, "hash:", 5) == 0) { name.len = name.len - 5; memmove(name.data, name.data + 5, name.len); cn->cn_has_legacy = true; } |
6ee95d1c8 nfsd: add support... |
824 |
if (!nfs4_client_to_reclaim(name, princhash, nn)) { |
74725959c nfsd: un-deprecat... |
825 |
kfree(name.data); |
6ee95d1c8 nfsd: add support... |
826 |
kfree(princhash.data); |
74725959c nfsd: un-deprecat... |
827 828 |
return -EFAULT; } |
11a60d159 nfsd: add a "GetV... |
829 |
return nn->client_tracking_ops->msglen; |
74725959c nfsd: un-deprecat... |
830 831 832 833 834 |
} return -EFAULT; } static ssize_t |
f3f801486 nfsd: add the inf... |
835 836 837 |
cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) { struct cld_upcall *tmp, *cup; |
11a60d159 nfsd: add a "GetV... |
838 |
struct cld_msg_hdr __user *hdr = (struct cld_msg_hdr __user *)src; |
6ee95d1c8 nfsd: add support... |
839 |
struct cld_msg_v2 __user *cmsg = (struct cld_msg_v2 __user *)src; |
f3f801486 nfsd: add the inf... |
840 |
uint32_t xid; |
ef8a1a10e nfsd: get rid of ... |
841 |
struct nfsd_net *nn = net_generic(file_inode(filp)->i_sb->s_fs_info, |
f3f801486 nfsd: add the inf... |
842 843 |
nfsd_net_id); struct cld_net *cn = nn->cld_net; |
74725959c nfsd: un-deprecat... |
844 |
int16_t status; |
f3f801486 nfsd: add the inf... |
845 |
|
11a60d159 nfsd: add a "GetV... |
846 |
if (mlen != nn->client_tracking_ops->msglen) { |
8a7dc4b04 nfsd: fix nfs4rec... |
847 848 |
dprintk("%s: got %zu bytes, expected %zu ", __func__, mlen, |
11a60d159 nfsd: add a "GetV... |
849 |
nn->client_tracking_ops->msglen); |
f3f801486 nfsd: add the inf... |
850 851 852 853 |
return -EINVAL; } /* copy just the xid so we can try to find that */ |
11a60d159 nfsd: add a "GetV... |
854 |
if (copy_from_user(&xid, &hdr->cm_xid, sizeof(xid)) != 0) { |
f3f801486 nfsd: add the inf... |
855 856 857 |
dprintk("%s: error when copying xid from userspace", __func__); return -EFAULT; } |
74725959c nfsd: un-deprecat... |
858 859 860 861 862 |
/* * copy the status so we know whether to remove the upcall from the * list (for -EINPROGRESS, we just want to make sure the xid is * valid, not remove the upcall from the list) */ |
11a60d159 nfsd: add a "GetV... |
863 |
if (get_user(status, &hdr->cm_status)) { |
74725959c nfsd: un-deprecat... |
864 865 866 |
dprintk("%s: error when copying status from userspace", __func__); return -EFAULT; } |
f3f801486 nfsd: add the inf... |
867 868 869 870 |
/* walk the list and find corresponding xid */ cup = NULL; spin_lock(&cn->cn_lock); list_for_each_entry(tmp, &cn->cn_list, cu_list) { |
11a60d159 nfsd: add a "GetV... |
871 |
if (get_unaligned(&tmp->cu_u.cu_hdr.cm_xid) == xid) { |
f3f801486 nfsd: add the inf... |
872 |
cup = tmp; |
74725959c nfsd: un-deprecat... |
873 874 |
if (status != -EINPROGRESS) list_del_init(&cup->cu_list); |
f3f801486 nfsd: add the inf... |
875 876 877 878 879 880 881 |
break; } } spin_unlock(&cn->cn_lock); /* couldn't find upcall? */ if (!cup) { |
21f72c9f0 nfsd: fix NULL po... |
882 883 |
dprintk("%s: couldn't find upcall -- xid=%u ", __func__, xid); |
f3f801486 nfsd: add the inf... |
884 885 |
return -EINVAL; } |
74725959c nfsd: un-deprecat... |
886 887 |
if (status == -EINPROGRESS) return __cld_pipe_inprogress_downcall(cmsg, nn); |
6ee95d1c8 nfsd: add support... |
888 |
if (copy_from_user(&cup->cu_u.cu_msg_v2, src, mlen) != 0) |
f3f801486 nfsd: add the inf... |
889 |
return -EFAULT; |
b493fd31c nfsd: fix a warni... |
890 |
complete(&cup->cu_done); |
f3f801486 nfsd: add the inf... |
891 892 893 894 895 896 897 898 |
return mlen; } static void cld_pipe_destroy_msg(struct rpc_pipe_msg *msg) { struct cld_msg *cmsg = msg->data; struct cld_upcall *cup = container_of(cmsg, struct cld_upcall, |
11a60d159 nfsd: add a "GetV... |
899 |
cu_u.cu_msg); |
f3f801486 nfsd: add the inf... |
900 901 902 903 |
/* errno >= 0 means we got a downcall */ if (msg->errno >= 0) return; |
b493fd31c nfsd: fix a warni... |
904 |
complete(&cup->cu_done); |
f3f801486 nfsd: add the inf... |
905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 |
} static const struct rpc_pipe_ops cld_upcall_ops = { .upcall = rpc_pipe_generic_upcall, .downcall = cld_pipe_downcall, .destroy_msg = cld_pipe_destroy_msg, }; static struct dentry * nfsd4_cld_register_sb(struct super_block *sb, struct rpc_pipe *pipe) { struct dentry *dir, *dentry; dir = rpc_d_lookup_sb(sb, NFSD_PIPE_DIR); if (dir == NULL) return ERR_PTR(-ENOENT); dentry = rpc_mkpipe_dentry(dir, NFSD_CLD_PIPE, NULL, pipe); dput(dir); return dentry; } static void nfsd4_cld_unregister_sb(struct rpc_pipe *pipe) { if (pipe->dentry) rpc_unlink(pipe->dentry); } static struct dentry * nfsd4_cld_register_net(struct net *net, struct rpc_pipe *pipe) { struct super_block *sb; struct dentry *dentry; sb = rpc_get_sb_net(net); if (!sb) return NULL; dentry = nfsd4_cld_register_sb(sb, pipe); rpc_put_sb_net(net); return dentry; } static void nfsd4_cld_unregister_net(struct net *net, struct rpc_pipe *pipe) { struct super_block *sb; sb = rpc_get_sb_net(net); if (sb) { nfsd4_cld_unregister_sb(pipe); rpc_put_sb_net(net); } } /* Initialize rpc_pipefs pipe for communication with client tracking daemon */ static int |
869216075 nfsd: re-order cl... |
961 |
__nfsd4_init_cld_pipe(struct net *net) |
f3f801486 nfsd: add the inf... |
962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 |
{ int ret; struct dentry *dentry; struct nfsd_net *nn = net_generic(net, nfsd_net_id); struct cld_net *cn; if (nn->cld_net) return 0; cn = kzalloc(sizeof(*cn), GFP_KERNEL); if (!cn) { ret = -ENOMEM; goto err; } cn->cn_pipe = rpc_mkpipe_data(&cld_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); if (IS_ERR(cn->cn_pipe)) { ret = PTR_ERR(cn->cn_pipe); goto err; } spin_lock_init(&cn->cn_lock); INIT_LIST_HEAD(&cn->cn_list); dentry = nfsd4_cld_register_net(net, cn->cn_pipe); if (IS_ERR(dentry)) { ret = PTR_ERR(dentry); goto err_destroy_data; } cn->cn_pipe->dentry = dentry; |
8a9f4f412 nfsd: handle lega... |
992 |
cn->cn_has_legacy = false; |
f3f801486 nfsd: add the inf... |
993 994 995 996 997 998 999 1000 1001 1002 1003 1004 |
nn->cld_net = cn; return 0; err_destroy_data: rpc_destroy_pipe_data(cn->cn_pipe); err: kfree(cn); printk(KERN_ERR "NFSD: unable to create nfsdcld upcall pipe (%d) ", ret); return ret; } |
869216075 nfsd: re-order cl... |
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 |
static int nfsd4_init_cld_pipe(struct net *net) { int status; status = __nfsd4_init_cld_pipe(net); if (!status) printk("NFSD: Using old nfsdcld client tracking operations. "); return status; } |
f3f801486 nfsd: add the inf... |
1016 1017 1018 1019 1020 1021 1022 1023 |
static void nfsd4_remove_cld_pipe(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); struct cld_net *cn = nn->cld_net; nfsd4_cld_unregister_net(net, cn->cn_pipe); rpc_destroy_pipe_data(cn->cn_pipe); |
6ee95d1c8 nfsd: add support... |
1024 1025 |
if (cn->cn_tfm) crypto_free_shash(cn->cn_tfm); |
f3f801486 nfsd: add the inf... |
1026 1027 1028 1029 1030 |
kfree(nn->cld_net); nn->cld_net = NULL; } static struct cld_upcall * |
11a60d159 nfsd: add a "GetV... |
1031 |
alloc_cld_upcall(struct nfsd_net *nn) |
f3f801486 nfsd: add the inf... |
1032 1033 |
{ struct cld_upcall *new, *tmp; |
11a60d159 nfsd: add a "GetV... |
1034 |
struct cld_net *cn = nn->cld_net; |
f3f801486 nfsd: add the inf... |
1035 1036 1037 1038 1039 1040 1041 1042 1043 |
new = kzalloc(sizeof(*new), GFP_KERNEL); if (!new) return new; /* FIXME: hard cap on number in flight? */ restart_search: spin_lock(&cn->cn_lock); list_for_each_entry(tmp, &cn->cn_list, cu_list) { |
11a60d159 nfsd: add a "GetV... |
1044 |
if (tmp->cu_u.cu_msg.cm_xid == cn->cn_xid) { |
f3f801486 nfsd: add the inf... |
1045 1046 1047 1048 1049 |
cn->cn_xid++; spin_unlock(&cn->cn_lock); goto restart_search; } } |
b493fd31c nfsd: fix a warni... |
1050 |
init_completion(&new->cu_done); |
11a60d159 nfsd: add a "GetV... |
1051 1052 |
new->cu_u.cu_msg.cm_vers = nn->client_tracking_ops->version; put_unaligned(cn->cn_xid++, &new->cu_u.cu_msg.cm_xid); |
f3f801486 nfsd: add the inf... |
1053 1054 1055 |
new->cu_net = cn; list_add(&new->cu_list, &cn->cn_list); spin_unlock(&cn->cn_lock); |
11a60d159 nfsd: add a "GetV... |
1056 1057 |
dprintk("%s: allocated xid %u ", __func__, new->cu_u.cu_msg.cm_xid); |
f3f801486 nfsd: add the inf... |
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 |
return new; } static void free_cld_upcall(struct cld_upcall *victim) { struct cld_net *cn = victim->cu_net; spin_lock(&cn->cn_lock); list_del(&victim->cu_list); spin_unlock(&cn->cn_lock); kfree(victim); } /* Ask daemon to create a new record */ static void nfsd4_cld_create(struct nfs4_client *clp) { int ret; struct cld_upcall *cup; |
c212cecfa nfsd: make nfs4_c... |
1079 |
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
f3f801486 nfsd: add the inf... |
1080 1081 1082 1083 1084 |
struct cld_net *cn = nn->cld_net; /* Don't upcall if it's already stored */ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return; |
11a60d159 nfsd: add a "GetV... |
1085 |
cup = alloc_cld_upcall(nn); |
f3f801486 nfsd: add the inf... |
1086 1087 1088 1089 |
if (!cup) { ret = -ENOMEM; goto out_err; } |
11a60d159 nfsd: add a "GetV... |
1090 1091 1092 |
cup->cu_u.cu_msg.cm_cmd = Cld_Create; cup->cu_u.cu_msg.cm_u.cm_name.cn_len = clp->cl_name.len; memcpy(cup->cu_u.cu_msg.cm_u.cm_name.cn_id, clp->cl_name.data, |
f3f801486 nfsd: add the inf... |
1093 |
clp->cl_name.len); |
df60446cd nfsd: avoid a NUL... |
1094 |
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
f3f801486 nfsd: add the inf... |
1095 |
if (!ret) { |
11a60d159 nfsd: add a "GetV... |
1096 |
ret = cup->cu_u.cu_msg.cm_status; |
f3f801486 nfsd: add the inf... |
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 |
set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); } free_cld_upcall(cup); out_err: if (ret) printk(KERN_ERR "NFSD: Unable to create client " "record on stable storage: %d ", ret); } /* Ask daemon to create a new record */ static void |
6ee95d1c8 nfsd: add support... |
1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 |
nfsd4_cld_create_v2(struct nfs4_client *clp) { int ret; struct cld_upcall *cup; struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); struct cld_net *cn = nn->cld_net; struct cld_msg_v2 *cmsg; struct crypto_shash *tfm = cn->cn_tfm; struct xdr_netobj cksum; char *principal = NULL; |
6ee95d1c8 nfsd: add support... |
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 |
/* Don't upcall if it's already stored */ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return; cup = alloc_cld_upcall(nn); if (!cup) { ret = -ENOMEM; goto out_err; } cmsg = &cup->cu_u.cu_msg_v2; cmsg->cm_cmd = Cld_Create; cmsg->cm_u.cm_clntinfo.cc_name.cn_len = clp->cl_name.len; memcpy(cmsg->cm_u.cm_clntinfo.cc_name.cn_id, clp->cl_name.data, clp->cl_name.len); if (clp->cl_cred.cr_raw_principal) principal = clp->cl_cred.cr_raw_principal; else if (clp->cl_cred.cr_principal) principal = clp->cl_cred.cr_principal; if (principal) { |
6ee95d1c8 nfsd: add support... |
1141 1142 1143 1144 1145 1146 |
cksum.len = crypto_shash_digestsize(tfm); cksum.data = kmalloc(cksum.len, GFP_KERNEL); if (cksum.data == NULL) { ret = -ENOMEM; goto out; } |
ea794db26 nfsd: use crypto_... |
1147 1148 |
ret = crypto_shash_tfm_digest(tfm, principal, strlen(principal), cksum.data); |
6ee95d1c8 nfsd: add support... |
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 |
if (ret) { kfree(cksum.data); goto out; } cmsg->cm_u.cm_clntinfo.cc_princhash.cp_len = cksum.len; memcpy(cmsg->cm_u.cm_clntinfo.cc_princhash.cp_data, cksum.data, cksum.len); kfree(cksum.data); } else cmsg->cm_u.cm_clntinfo.cc_princhash.cp_len = 0; |
df60446cd nfsd: avoid a NUL... |
1159 |
ret = cld_pipe_upcall(cn->cn_pipe, cmsg, nn); |
6ee95d1c8 nfsd: add support... |
1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 |
if (!ret) { ret = cmsg->cm_status; set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); } out: free_cld_upcall(cup); out_err: if (ret) pr_err("NFSD: Unable to create client record on stable storage: %d ", ret); } /* Ask daemon to create a new record */ static void |
f3f801486 nfsd: add the inf... |
1176 1177 1178 1179 |
nfsd4_cld_remove(struct nfs4_client *clp) { int ret; struct cld_upcall *cup; |
c212cecfa nfsd: make nfs4_c... |
1180 |
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
f3f801486 nfsd: add the inf... |
1181 1182 1183 1184 1185 |
struct cld_net *cn = nn->cld_net; /* Don't upcall if it's already removed */ if (!test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return; |
11a60d159 nfsd: add a "GetV... |
1186 |
cup = alloc_cld_upcall(nn); |
f3f801486 nfsd: add the inf... |
1187 1188 1189 1190 |
if (!cup) { ret = -ENOMEM; goto out_err; } |
11a60d159 nfsd: add a "GetV... |
1191 1192 1193 |
cup->cu_u.cu_msg.cm_cmd = Cld_Remove; cup->cu_u.cu_msg.cm_u.cm_name.cn_len = clp->cl_name.len; memcpy(cup->cu_u.cu_msg.cm_u.cm_name.cn_id, clp->cl_name.data, |
f3f801486 nfsd: add the inf... |
1194 |
clp->cl_name.len); |
df60446cd nfsd: avoid a NUL... |
1195 |
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
f3f801486 nfsd: add the inf... |
1196 |
if (!ret) { |
11a60d159 nfsd: add a "GetV... |
1197 |
ret = cup->cu_u.cu_msg.cm_status; |
f3f801486 nfsd: add the inf... |
1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 |
clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); } free_cld_upcall(cup); out_err: if (ret) printk(KERN_ERR "NFSD: Unable to remove client " "record from stable storage: %d ", ret); } |
74725959c nfsd: un-deprecat... |
1208 1209 1210 1211 1212 1213 |
/* * For older nfsdcld's that do not allow us to "slurp" the clients * from the tracking database during startup. * * Check for presence of a record, and update its timestamp */ |
f3f801486 nfsd: add the inf... |
1214 |
static int |
74725959c nfsd: un-deprecat... |
1215 |
nfsd4_cld_check_v0(struct nfs4_client *clp) |
f3f801486 nfsd: add the inf... |
1216 1217 1218 |
{ int ret; struct cld_upcall *cup; |
c212cecfa nfsd: make nfs4_c... |
1219 |
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
f3f801486 nfsd: add the inf... |
1220 1221 1222 1223 1224 |
struct cld_net *cn = nn->cld_net; /* Don't upcall if one was already stored during this grace pd */ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return 0; |
11a60d159 nfsd: add a "GetV... |
1225 |
cup = alloc_cld_upcall(nn); |
f3f801486 nfsd: add the inf... |
1226 1227 1228 1229 1230 1231 |
if (!cup) { printk(KERN_ERR "NFSD: Unable to check client record on " "stable storage: %d ", -ENOMEM); return -ENOMEM; } |
11a60d159 nfsd: add a "GetV... |
1232 1233 1234 |
cup->cu_u.cu_msg.cm_cmd = Cld_Check; cup->cu_u.cu_msg.cm_u.cm_name.cn_len = clp->cl_name.len; memcpy(cup->cu_u.cu_msg.cm_u.cm_name.cn_id, clp->cl_name.data, |
f3f801486 nfsd: add the inf... |
1235 |
clp->cl_name.len); |
df60446cd nfsd: avoid a NUL... |
1236 |
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
f3f801486 nfsd: add the inf... |
1237 |
if (!ret) { |
11a60d159 nfsd: add a "GetV... |
1238 |
ret = cup->cu_u.cu_msg.cm_status; |
f3f801486 nfsd: add the inf... |
1239 1240 1241 1242 1243 1244 |
set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); } free_cld_upcall(cup); return ret; } |
74725959c nfsd: un-deprecat... |
1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 |
/* * For newer nfsdcld's that allow us to "slurp" the clients * from the tracking database during startup. * * Check for presence of a record in the reclaim_str_hashtbl */ static int nfsd4_cld_check(struct nfs4_client *clp) { struct nfs4_client_reclaim *crp; struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
8a9f4f412 nfsd: handle lega... |
1256 1257 1258 1259 |
struct cld_net *cn = nn->cld_net; int status; char dname[HEXDIR_LEN]; struct xdr_netobj name; |
74725959c nfsd: un-deprecat... |
1260 1261 1262 1263 1264 1265 1266 |
/* did we already find that this client is stable? */ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return 0; /* look for it in the reclaim hashtable otherwise */ crp = nfsd4_find_reclaim_client(clp->cl_name, nn); |
8a9f4f412 nfsd: handle lega... |
1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 |
if (crp) goto found; if (cn->cn_has_legacy) { status = nfs4_make_rec_clidname(dname, &clp->cl_name); if (status) return -ENOENT; name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL); if (!name.data) { dprintk("%s: failed to allocate memory for name.data! ", __func__); return -ENOENT; } name.len = HEXDIR_LEN; crp = nfsd4_find_reclaim_client(name, nn); kfree(name.data); if (crp) goto found; |
74725959c nfsd: un-deprecat... |
1287 |
|
8a9f4f412 nfsd: handle lega... |
1288 |
} |
74725959c nfsd: un-deprecat... |
1289 |
return -ENOENT; |
8a9f4f412 nfsd: handle lega... |
1290 1291 1292 |
found: crp->cr_clp = clp; return 0; |
74725959c nfsd: un-deprecat... |
1293 1294 1295 |
} static int |
6ee95d1c8 nfsd: add support... |
1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 |
nfsd4_cld_check_v2(struct nfs4_client *clp) { struct nfs4_client_reclaim *crp; struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); struct cld_net *cn = nn->cld_net; int status; char dname[HEXDIR_LEN]; struct xdr_netobj name; struct crypto_shash *tfm = cn->cn_tfm; struct xdr_netobj cksum; char *principal = NULL; |
6ee95d1c8 nfsd: add support... |
1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 |
/* did we already find that this client is stable? */ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return 0; /* look for it in the reclaim hashtable otherwise */ crp = nfsd4_find_reclaim_client(clp->cl_name, nn); if (crp) goto found; if (cn->cn_has_legacy) { status = nfs4_make_rec_clidname(dname, &clp->cl_name); if (status) return -ENOENT; name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL); if (!name.data) { dprintk("%s: failed to allocate memory for name.data ", __func__); return -ENOENT; } name.len = HEXDIR_LEN; crp = nfsd4_find_reclaim_client(name, nn); kfree(name.data); if (crp) goto found; } return -ENOENT; found: if (crp->cr_princhash.len) { if (clp->cl_cred.cr_raw_principal) principal = clp->cl_cred.cr_raw_principal; else if (clp->cl_cred.cr_principal) principal = clp->cl_cred.cr_principal; if (principal == NULL) return -ENOENT; |
6ee95d1c8 nfsd: add support... |
1345 1346 1347 1348 |
cksum.len = crypto_shash_digestsize(tfm); cksum.data = kmalloc(cksum.len, GFP_KERNEL); if (cksum.data == NULL) return -ENOENT; |
ea794db26 nfsd: use crypto_... |
1349 1350 |
status = crypto_shash_tfm_digest(tfm, principal, strlen(principal), cksum.data); |
6ee95d1c8 nfsd: add support... |
1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 |
if (status) { kfree(cksum.data); return -ENOENT; } if (memcmp(crp->cr_princhash.data, cksum.data, crp->cr_princhash.len)) { kfree(cksum.data); return -ENOENT; } kfree(cksum.data); } crp->cr_clp = clp; return 0; } static int |
74725959c nfsd: un-deprecat... |
1367 1368 1369 1370 1371 |
nfsd4_cld_grace_start(struct nfsd_net *nn) { int ret; struct cld_upcall *cup; struct cld_net *cn = nn->cld_net; |
11a60d159 nfsd: add a "GetV... |
1372 |
cup = alloc_cld_upcall(nn); |
74725959c nfsd: un-deprecat... |
1373 1374 1375 1376 |
if (!cup) { ret = -ENOMEM; goto out_err; } |
11a60d159 nfsd: add a "GetV... |
1377 |
cup->cu_u.cu_msg.cm_cmd = Cld_GraceStart; |
df60446cd nfsd: avoid a NUL... |
1378 |
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
74725959c nfsd: un-deprecat... |
1379 |
if (!ret) |
11a60d159 nfsd: add a "GetV... |
1380 |
ret = cup->cu_u.cu_msg.cm_status; |
74725959c nfsd: un-deprecat... |
1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 |
free_cld_upcall(cup); out_err: if (ret) dprintk("%s: Unable to get clients from userspace: %d ", __func__, ret); return ret; } /* For older nfsdcld's that need cm_gracetime */ |
f3f801486 nfsd: add the inf... |
1392 |
static void |
74725959c nfsd: un-deprecat... |
1393 |
nfsd4_cld_grace_done_v0(struct nfsd_net *nn) |
f3f801486 nfsd: add the inf... |
1394 1395 1396 |
{ int ret; struct cld_upcall *cup; |
f3f801486 nfsd: add the inf... |
1397 |
struct cld_net *cn = nn->cld_net; |
11a60d159 nfsd: add a "GetV... |
1398 |
cup = alloc_cld_upcall(nn); |
f3f801486 nfsd: add the inf... |
1399 1400 1401 1402 |
if (!cup) { ret = -ENOMEM; goto out_err; } |
11a60d159 nfsd: add a "GetV... |
1403 |
cup->cu_u.cu_msg.cm_cmd = Cld_GraceDone; |
9cc768014 nfsd: make 'boot_... |
1404 |
cup->cu_u.cu_msg.cm_u.cm_gracetime = nn->boot_time; |
df60446cd nfsd: avoid a NUL... |
1405 |
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
f3f801486 nfsd: add the inf... |
1406 |
if (!ret) |
11a60d159 nfsd: add a "GetV... |
1407 |
ret = cup->cu_u.cu_msg.cm_status; |
f3f801486 nfsd: add the inf... |
1408 1409 1410 1411 1412 1413 1414 |
free_cld_upcall(cup); out_err: if (ret) printk(KERN_ERR "NFSD: Unable to end grace period: %d ", ret); } |
74725959c nfsd: un-deprecat... |
1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 |
/* * For newer nfsdcld's that do not need cm_gracetime. We also need to call * nfs4_release_reclaim() to clear out the reclaim_str_hashtbl. */ static void nfsd4_cld_grace_done(struct nfsd_net *nn) { int ret; struct cld_upcall *cup; struct cld_net *cn = nn->cld_net; |
11a60d159 nfsd: add a "GetV... |
1425 |
cup = alloc_cld_upcall(nn); |
74725959c nfsd: un-deprecat... |
1426 1427 1428 1429 |
if (!cup) { ret = -ENOMEM; goto out_err; } |
11a60d159 nfsd: add a "GetV... |
1430 |
cup->cu_u.cu_msg.cm_cmd = Cld_GraceDone; |
df60446cd nfsd: avoid a NUL... |
1431 |
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
74725959c nfsd: un-deprecat... |
1432 |
if (!ret) |
11a60d159 nfsd: add a "GetV... |
1433 |
ret = cup->cu_u.cu_msg.cm_status; |
74725959c nfsd: un-deprecat... |
1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 |
free_cld_upcall(cup); out_err: nfs4_release_reclaim(nn); if (ret) printk(KERN_ERR "NFSD: Unable to end grace period: %d ", ret); } static int nfs4_cld_state_init(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); int i; nn->reclaim_str_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, sizeof(struct list_head), GFP_KERNEL); if (!nn->reclaim_str_hashtbl) return -ENOMEM; for (i = 0; i < CLIENT_HASH_SIZE; i++) INIT_LIST_HEAD(&nn->reclaim_str_hashtbl[i]); nn->reclaim_str_hashtbl_size = 0; |
362063a59 nfsd: keep a tall... |
1458 1459 |
nn->track_reclaim_completes = true; atomic_set(&nn->nr_reclaim_complete, 0); |
74725959c nfsd: un-deprecat... |
1460 1461 1462 1463 1464 1465 1466 1467 |
return 0; } static void nfs4_cld_state_shutdown(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
362063a59 nfsd: keep a tall... |
1468 |
nn->track_reclaim_completes = false; |
74725959c nfsd: un-deprecat... |
1469 1470 |
kfree(nn->reclaim_str_hashtbl); } |
869216075 nfsd: re-order cl... |
1471 1472 1473 1474 1475 1476 1477 1478 |
static bool cld_running(struct nfsd_net *nn) { struct cld_net *cn = nn->cld_net; struct rpc_pipe *pipe = cn->cn_pipe; return pipe->nreaders || pipe->nwriters; } |
74725959c nfsd: un-deprecat... |
1479 |
static int |
11a60d159 nfsd: add a "GetV... |
1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 |
nfsd4_cld_get_version(struct nfsd_net *nn) { int ret = 0; struct cld_upcall *cup; struct cld_net *cn = nn->cld_net; uint8_t version; cup = alloc_cld_upcall(nn); if (!cup) { ret = -ENOMEM; goto out_err; } cup->cu_u.cu_msg.cm_cmd = Cld_GetVersion; |
df60446cd nfsd: avoid a NUL... |
1493 |
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
11a60d159 nfsd: add a "GetV... |
1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 |
if (!ret) { ret = cup->cu_u.cu_msg.cm_status; if (ret) goto out_free; version = cup->cu_u.cu_msg.cm_u.cm_version; dprintk("%s: userspace returned version %u ", __func__, version); if (version < 1) version = 1; else if (version > CLD_UPCALL_VERSION) version = CLD_UPCALL_VERSION; switch (version) { case 1: nn->client_tracking_ops = &nfsd4_cld_tracking_ops; break; |
6ee95d1c8 nfsd: add support... |
1511 1512 1513 |
case 2: nn->client_tracking_ops = &nfsd4_cld_tracking_ops_v2; break; |
11a60d159 nfsd: add a "GetV... |
1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 |
default: break; } } out_free: free_cld_upcall(cup); out_err: if (ret) dprintk("%s: Unable to get version from userspace: %d ", __func__, ret); return ret; } static int |
74725959c nfsd: un-deprecat... |
1529 1530 1531 1532 |
nfsd4_cld_tracking_init(struct net *net) { int status; struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
869216075 nfsd: re-order cl... |
1533 1534 |
bool running; int retries = 10; |
18b9a895e nfsd: Fix cld_net... |
1535 |
struct crypto_shash *tfm; |
74725959c nfsd: un-deprecat... |
1536 1537 1538 1539 |
status = nfs4_cld_state_init(net); if (status) return status; |
869216075 nfsd: re-order cl... |
1540 |
status = __nfsd4_init_cld_pipe(net); |
74725959c nfsd: un-deprecat... |
1541 1542 |
if (status) goto err_shutdown; |
869216075 nfsd: re-order cl... |
1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 |
/* * rpc pipe upcalls take 30 seconds to time out, so we don't want to * queue an upcall unless we know that nfsdcld is running (because we * want this to fail fast so that nfsd4_client_tracking_init() can try * the next client tracking method). nfsdcld should already be running * before nfsd is started, so the wait here is for nfsdcld to open the * pipefs file we just created. */ while (!(running = cld_running(nn)) && retries--) msleep(100); if (!running) { status = -ETIMEDOUT; goto err_remove; } |
18b9a895e nfsd: Fix cld_net... |
1558 1559 1560 1561 1562 1563 |
tfm = crypto_alloc_shash("sha256", 0, 0); if (IS_ERR(tfm)) { status = PTR_ERR(tfm); goto err_remove; } nn->cld_net->cn_tfm = tfm; |
869216075 nfsd: re-order cl... |
1564 |
|
11a60d159 nfsd: add a "GetV... |
1565 1566 1567 1568 |
status = nfsd4_cld_get_version(nn); if (status == -EOPNOTSUPP) pr_warn("NFSD: nfsdcld GetVersion upcall failed. Please upgrade nfsdcld. "); |
74725959c nfsd: un-deprecat... |
1569 1570 1571 |
status = nfsd4_cld_grace_start(nn); if (status) { if (status == -EOPNOTSUPP) |
11a60d159 nfsd: add a "GetV... |
1572 1573 |
pr_warn("NFSD: nfsdcld GraceStart upcall failed. Please upgrade nfsdcld. "); |
74725959c nfsd: un-deprecat... |
1574 1575 |
nfs4_release_reclaim(nn); goto err_remove; |
869216075 nfsd: re-order cl... |
1576 1577 1578 |
} else printk("NFSD: Using nfsdcld client tracking operations. "); |
74725959c nfsd: un-deprecat... |
1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 |
return 0; err_remove: nfsd4_remove_cld_pipe(net); err_shutdown: nfs4_cld_state_shutdown(net); return status; } static void nfsd4_cld_tracking_exit(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); nfs4_release_reclaim(nn); nfsd4_remove_cld_pipe(net); nfs4_cld_state_shutdown(net); } /* For older nfsdcld's */ static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v0 = { |
f3f801486 nfsd: add the inf... |
1600 1601 1602 1603 |
.init = nfsd4_init_cld_pipe, .exit = nfsd4_remove_cld_pipe, .create = nfsd4_cld_create, .remove = nfsd4_cld_remove, |
74725959c nfsd: un-deprecat... |
1604 1605 |
.check = nfsd4_cld_check_v0, .grace_done = nfsd4_cld_grace_done_v0, |
11a60d159 nfsd: add a "GetV... |
1606 1607 |
.version = 1, .msglen = sizeof(struct cld_msg), |
74725959c nfsd: un-deprecat... |
1608 1609 1610 1611 1612 1613 1614 1615 |
}; /* For newer nfsdcld's */ static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops = { .init = nfsd4_cld_tracking_init, .exit = nfsd4_cld_tracking_exit, .create = nfsd4_cld_create, .remove = nfsd4_cld_remove, |
f3f801486 nfsd: add the inf... |
1616 1617 |
.check = nfsd4_cld_check, .grace_done = nfsd4_cld_grace_done, |
11a60d159 nfsd: add a "GetV... |
1618 1619 |
.version = 1, .msglen = sizeof(struct cld_msg), |
f3f801486 nfsd: add the inf... |
1620 |
}; |
6ee95d1c8 nfsd: add support... |
1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 |
/* v2 create/check ops include the principal, if available */ static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v2 = { .init = nfsd4_cld_tracking_init, .exit = nfsd4_cld_tracking_exit, .create = nfsd4_cld_create_v2, .remove = nfsd4_cld_remove, .check = nfsd4_cld_check_v2, .grace_done = nfsd4_cld_grace_done, .version = 2, .msglen = sizeof(struct cld_msg_v2), }; |
2873d2147 nfsd: add a userm... |
1632 1633 1634 1635 1636 |
/* upcall via usermodehelper */ static char cltrack_prog[PATH_MAX] = "/sbin/nfsdcltrack"; module_param_string(cltrack_prog, cltrack_prog, sizeof(cltrack_prog), S_IRUGO|S_IWUSR); MODULE_PARM_DESC(cltrack_prog, "Path to the nfsdcltrack upcall program"); |
f3aa7e24c nfsd: pass info a... |
1637 1638 1639 1640 1641 1642 1643 |
static bool cltrack_legacy_disable; module_param(cltrack_legacy_disable, bool, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(cltrack_legacy_disable, "Disable legacy recoverydir conversion. Default: false"); #define LEGACY_TOPDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_TOPDIR=" #define LEGACY_RECDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_RECDIR=" |
d4318acd5 nfsd: pass extra ... |
1644 1645 |
#define HAS_SESSION_ENV_PREFIX "NFSDCLTRACK_CLIENT_HAS_SESSION=" #define GRACE_START_ENV_PREFIX "NFSDCLTRACK_GRACE_START=" |
f3aa7e24c nfsd: pass info a... |
1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 |
static char * nfsd4_cltrack_legacy_topdir(void) { int copied; size_t len; char *result; if (cltrack_legacy_disable) return NULL; len = strlen(LEGACY_TOPDIR_ENV_PREFIX) + strlen(nfs4_recoverydir()) + 1; result = kmalloc(len, GFP_KERNEL); if (!result) return result; copied = snprintf(result, len, LEGACY_TOPDIR_ENV_PREFIX "%s", nfs4_recoverydir()); if (copied >= len) { /* just return nothing if output was truncated */ kfree(result); return NULL; } return result; } static char * |
2216d449a nfsd: get rid of ... |
1676 |
nfsd4_cltrack_legacy_recdir(const struct xdr_netobj *name) |
f3aa7e24c nfsd: pass info a... |
1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 |
{ int copied; size_t len; char *result; if (cltrack_legacy_disable) return NULL; /* +1 is for '/' between "topdir" and "recdir" */ len = strlen(LEGACY_RECDIR_ENV_PREFIX) + strlen(nfs4_recoverydir()) + 1 + HEXDIR_LEN; result = kmalloc(len, GFP_KERNEL); if (!result) return result; |
2216d449a nfsd: get rid of ... |
1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 |
copied = snprintf(result, len, LEGACY_RECDIR_ENV_PREFIX "%s/", nfs4_recoverydir()); if (copied > (len - HEXDIR_LEN)) { /* just return nothing if output will be truncated */ kfree(result); return NULL; } copied = nfs4_make_rec_clidname(result + copied, name); if (copied) { |
f3aa7e24c nfsd: pass info a... |
1702 1703 1704 1705 1706 1707 |
kfree(result); return NULL; } return result; } |
d4318acd5 nfsd: pass extra ... |
1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 |
static char * nfsd4_cltrack_client_has_session(struct nfs4_client *clp) { int copied; size_t len; char *result; /* prefix + Y/N character + terminating NULL */ len = strlen(HAS_SESSION_ENV_PREFIX) + 1 + 1; result = kmalloc(len, GFP_KERNEL); if (!result) return result; copied = snprintf(result, len, HAS_SESSION_ENV_PREFIX "%c", clp->cl_minorversion ? 'Y' : 'N'); if (copied >= len) { /* just return nothing if output was truncated */ kfree(result); return NULL; } return result; } static char * |
9cc768014 nfsd: make 'boot_... |
1734 |
nfsd4_cltrack_grace_start(time64_t grace_start) |
d4318acd5 nfsd: pass extra ... |
1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 |
{ int copied; size_t len; char *result; /* prefix + max width of int64_t string + terminating NULL */ len = strlen(GRACE_START_ENV_PREFIX) + 22 + 1; result = kmalloc(len, GFP_KERNEL); if (!result) return result; |
9cc768014 nfsd: make 'boot_... |
1746 |
copied = snprintf(result, len, GRACE_START_ENV_PREFIX "%lld", |
d4318acd5 nfsd: pass extra ... |
1747 1748 1749 1750 1751 1752 1753 1754 1755 |
grace_start); if (copied >= len) { /* just return nothing if output was truncated */ kfree(result); return NULL; } return result; } |
2873d2147 nfsd: add a userm... |
1756 |
static int |
d4318acd5 nfsd: pass extra ... |
1757 |
nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *env0, char *env1) |
2873d2147 nfsd: add a userm... |
1758 |
{ |
d4318acd5 nfsd: pass extra ... |
1759 |
char *envp[3]; |
2873d2147 nfsd: add a userm... |
1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 |
char *argv[4]; int ret; if (unlikely(!cltrack_prog[0])) { dprintk("%s: cltrack_prog is disabled ", __func__); return -EACCES; } dprintk("%s: cmd: %s ", __func__, cmd); dprintk("%s: arg: %s ", __func__, arg ? arg : "(null)"); |
d4318acd5 nfsd: pass extra ... |
1773 1774 1775 1776 |
dprintk("%s: env0: %s ", __func__, env0 ? env0 : "(null)"); dprintk("%s: env1: %s ", __func__, env1 ? env1 : "(null)"); |
f3aa7e24c nfsd: pass info a... |
1777 |
|
d4318acd5 nfsd: pass extra ... |
1778 1779 1780 |
envp[0] = env0; envp[1] = env1; envp[2] = NULL; |
2873d2147 nfsd: add a userm... |
1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 |
argv[0] = (char *)cltrack_prog; argv[1] = cmd; argv[2] = arg; argv[3] = NULL; ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC); /* * Disable the upcall mechanism if we're getting an ENOENT or EACCES * error. The admin can re-enable it on the fly by using sysfs * once the problem has been fixed. */ if (ret == -ENOENT || ret == -EACCES) { dprintk("NFSD: %s was not found or isn't executable (%d). " "Setting cltrack_prog to blank string!", cltrack_prog, ret); cltrack_prog[0] = '\0'; } dprintk("%s: %s return value: %d ", __func__, cltrack_prog, ret); return ret; } static char * bin_to_hex_dup(const unsigned char *src, int srclen) { |
12b4157b7 nfsd: remove priv... |
1808 |
char *buf; |
2873d2147 nfsd: add a userm... |
1809 1810 |
/* +1 for terminating NULL */ |
12b4157b7 nfsd: remove priv... |
1811 |
buf = kzalloc((srclen * 2) + 1, GFP_KERNEL); |
2873d2147 nfsd: add a userm... |
1812 1813 |
if (!buf) return buf; |
12b4157b7 nfsd: remove priv... |
1814 |
bin2hex(buf, src, srclen); |
2873d2147 nfsd: add a userm... |
1815 1816 1817 1818 |
return buf; } static int |
d4318acd5 nfsd: pass extra ... |
1819 |
nfsd4_umh_cltrack_init(struct net *net) |
2873d2147 nfsd: add a userm... |
1820 |
{ |
d4318acd5 nfsd: pass extra ... |
1821 1822 1823 |
int ret; struct nfsd_net *nn = net_generic(net, nfsd_net_id); char *grace_start = nfsd4_cltrack_grace_start(nn->boot_time); |
71a503069 nfsd: disable use... |
1824 1825 |
/* XXX: The usermode helper s not working in container yet. */ if (net != &init_net) { |
46cc8ba30 nfsd: don't WARN/... |
1826 1827 |
pr_warn("NFSD: attempt to initialize umh client tracking in a container ignored. "); |
956ccef3c nfsd: recover: fi... |
1828 |
kfree(grace_start); |
71a503069 nfsd: disable use... |
1829 1830 |
return -EINVAL; } |
d4318acd5 nfsd: pass extra ... |
1831 1832 1833 |
ret = nfsd4_umh_cltrack_upcall("init", NULL, grace_start, NULL); kfree(grace_start); |
869216075 nfsd: re-order cl... |
1834 1835 1836 |
if (!ret) printk("NFSD: Using UMH upcall client tracking operations. "); |
d4318acd5 nfsd: pass extra ... |
1837 |
return ret; |
2873d2147 nfsd: add a userm... |
1838 1839 1840 |
} static void |
d682e750c nfsd: serialize n... |
1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 |
nfsd4_cltrack_upcall_lock(struct nfs4_client *clp) { wait_on_bit_lock(&clp->cl_flags, NFSD4_CLIENT_UPCALL_LOCK, TASK_UNINTERRUPTIBLE); } static void nfsd4_cltrack_upcall_unlock(struct nfs4_client *clp) { smp_mb__before_atomic(); clear_bit(NFSD4_CLIENT_UPCALL_LOCK, &clp->cl_flags); smp_mb__after_atomic(); wake_up_bit(&clp->cl_flags, NFSD4_CLIENT_UPCALL_LOCK); } static void |
2873d2147 nfsd: add a userm... |
1857 1858 |
nfsd4_umh_cltrack_create(struct nfs4_client *clp) { |
d4318acd5 nfsd: pass extra ... |
1859 1860 |
char *hexid, *has_session, *grace_start; struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2873d2147 nfsd: add a userm... |
1861 |
|
65decb650 nfsd: skip subseq... |
1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 |
/* * With v4.0 clients, there's little difference in outcome between a * create and check operation, and we can end up calling into this * function multiple times per client (once for each openowner). So, * for v4.0 clients skip upcalling once the client has been recorded * on stable storage. * * For v4.1+ clients, the outcome of the two operations is different, * so we must ensure that we upcall for the create operation. v4.1+ * clients call this on RECLAIM_COMPLETE though, so we should only end * up doing a single create upcall per client. */ if (clp->cl_minorversion == 0 && test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return; |
2873d2147 nfsd: add a userm... |
1877 1878 1879 1880 1881 1882 |
hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); if (!hexid) { dprintk("%s: can't allocate memory for upcall! ", __func__); return; } |
d682e750c nfsd: serialize n... |
1883 |
|
d4318acd5 nfsd: pass extra ... |
1884 1885 |
has_session = nfsd4_cltrack_client_has_session(clp); grace_start = nfsd4_cltrack_grace_start(nn->boot_time); |
d682e750c nfsd: serialize n... |
1886 1887 |
nfsd4_cltrack_upcall_lock(clp); |
788a7914a nfsd: set and tes... |
1888 1889 |
if (!nfsd4_umh_cltrack_upcall("create", hexid, has_session, grace_start)) set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
d682e750c nfsd: serialize n... |
1890 |
nfsd4_cltrack_upcall_unlock(clp); |
d4318acd5 nfsd: pass extra ... |
1891 1892 |
kfree(has_session); kfree(grace_start); |
2873d2147 nfsd: add a userm... |
1893 1894 1895 1896 1897 1898 1899 |
kfree(hexid); } static void nfsd4_umh_cltrack_remove(struct nfs4_client *clp) { char *hexid; |
788a7914a nfsd: set and tes... |
1900 1901 |
if (!test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return; |
2873d2147 nfsd: add a userm... |
1902 1903 1904 1905 1906 1907 |
hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); if (!hexid) { dprintk("%s: can't allocate memory for upcall! ", __func__); return; } |
d682e750c nfsd: serialize n... |
1908 1909 |
nfsd4_cltrack_upcall_lock(clp); |
788a7914a nfsd: set and tes... |
1910 1911 1912 |
if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags) && nfsd4_umh_cltrack_upcall("remove", hexid, NULL, NULL) == 0) clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
d682e750c nfsd: serialize n... |
1913 |
nfsd4_cltrack_upcall_unlock(clp); |
2873d2147 nfsd: add a userm... |
1914 1915 1916 1917 1918 1919 1920 |
kfree(hexid); } static int nfsd4_umh_cltrack_check(struct nfs4_client *clp) { int ret; |
d4318acd5 nfsd: pass extra ... |
1921 |
char *hexid, *has_session, *legacy; |
2873d2147 nfsd: add a userm... |
1922 |
|
788a7914a nfsd: set and tes... |
1923 1924 |
if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return 0; |
2873d2147 nfsd: add a userm... |
1925 1926 1927 1928 1929 1930 |
hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); if (!hexid) { dprintk("%s: can't allocate memory for upcall! ", __func__); return -ENOMEM; } |
d4318acd5 nfsd: pass extra ... |
1931 1932 |
has_session = nfsd4_cltrack_client_has_session(clp); |
2216d449a nfsd: get rid of ... |
1933 |
legacy = nfsd4_cltrack_legacy_recdir(&clp->cl_name); |
d682e750c nfsd: serialize n... |
1934 1935 |
nfsd4_cltrack_upcall_lock(clp); |
788a7914a nfsd: set and tes... |
1936 1937 1938 1939 1940 1941 1942 |
if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) { ret = 0; } else { ret = nfsd4_umh_cltrack_upcall("check", hexid, has_session, legacy); if (ret == 0) set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); } |
d682e750c nfsd: serialize n... |
1943 |
nfsd4_cltrack_upcall_unlock(clp); |
d4318acd5 nfsd: pass extra ... |
1944 |
kfree(has_session); |
f3aa7e24c nfsd: pass info a... |
1945 |
kfree(legacy); |
2873d2147 nfsd: add a userm... |
1946 |
kfree(hexid); |
d4318acd5 nfsd: pass extra ... |
1947 |
|
2873d2147 nfsd: add a userm... |
1948 1949 1950 1951 |
return ret; } static void |
919b8049f nfsd: remove redu... |
1952 |
nfsd4_umh_cltrack_grace_done(struct nfsd_net *nn) |
2873d2147 nfsd: add a userm... |
1953 |
{ |
f3aa7e24c nfsd: pass info a... |
1954 |
char *legacy; |
2873d2147 nfsd: add a userm... |
1955 |
char timestr[22]; /* FIXME: better way to determine max size? */ |
9cc768014 nfsd: make 'boot_... |
1956 |
sprintf(timestr, "%lld", nn->boot_time); |
f3aa7e24c nfsd: pass info a... |
1957 |
legacy = nfsd4_cltrack_legacy_topdir(); |
d4318acd5 nfsd: pass extra ... |
1958 |
nfsd4_umh_cltrack_upcall("gracedone", timestr, legacy, NULL); |
f3aa7e24c nfsd: pass info a... |
1959 |
kfree(legacy); |
2873d2147 nfsd: add a userm... |
1960 |
} |
7c582e4fa nfsd: recover: co... |
1961 |
static const struct nfsd4_client_tracking_ops nfsd4_umh_tracking_ops = { |
2873d2147 nfsd: add a userm... |
1962 1963 1964 1965 1966 1967 |
.init = nfsd4_umh_cltrack_init, .exit = NULL, .create = nfsd4_umh_cltrack_create, .remove = nfsd4_umh_cltrack_remove, .check = nfsd4_umh_cltrack_check, .grace_done = nfsd4_umh_cltrack_grace_done, |
11a60d159 nfsd: add a "GetV... |
1968 1969 |
.version = 1, .msglen = 0, |
2873d2147 nfsd: add a userm... |
1970 |
}; |
2a4317c55 nfsd: add nfsd4_c... |
1971 1972 1973 1974 |
int nfsd4_client_tracking_init(struct net *net) { int status; |
f3f801486 nfsd: add the inf... |
1975 |
struct path path; |
9a9c6478a nfsd: make NFSv4 ... |
1976 |
struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2a4317c55 nfsd: add nfsd4_c... |
1977 |
|
2d77bf0a5 nfsd: change heur... |
1978 |
/* just run the init if it the method is already decided */ |
9a9c6478a nfsd: make NFSv4 ... |
1979 |
if (nn->client_tracking_ops) |
2d77bf0a5 nfsd: change heur... |
1980 |
goto do_init; |
869216075 nfsd: re-order cl... |
1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 |
/* First, try to use nfsdcld */ nn->client_tracking_ops = &nfsd4_cld_tracking_ops; status = nn->client_tracking_ops->init(net); if (!status) return status; if (status != -ETIMEDOUT) { nn->client_tracking_ops = &nfsd4_cld_tracking_ops_v0; status = nn->client_tracking_ops->init(net); if (!status) return status; } |
2d77bf0a5 nfsd: change heur... |
1992 |
/* |
869216075 nfsd: re-order cl... |
1993 |
* Next, try the UMH upcall. |
2d77bf0a5 nfsd: change heur... |
1994 |
*/ |
9a9c6478a nfsd: make NFSv4 ... |
1995 1996 |
nn->client_tracking_ops = &nfsd4_umh_tracking_ops; status = nn->client_tracking_ops->init(net); |
2d77bf0a5 nfsd: change heur... |
1997 1998 1999 2000 |
if (!status) return status; /* |
869216075 nfsd: re-order cl... |
2001 2002 |
* Finally, See if the recoverydir exists and is a directory. * If it is, then use the legacy ops. |
2d77bf0a5 nfsd: change heur... |
2003 |
*/ |
9a9c6478a nfsd: make NFSv4 ... |
2004 |
nn->client_tracking_ops = &nfsd4_legacy_tracking_ops; |
2d77bf0a5 nfsd: change heur... |
2005 2006 |
status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path); if (!status) { |
e36cb0b89 VFS: (Scripted) C... |
2007 |
status = d_is_dir(path.dentry); |
2d77bf0a5 nfsd: change heur... |
2008 |
path_put(&path); |
869216075 nfsd: re-order cl... |
2009 2010 2011 2012 |
if (!status) { status = -EINVAL; goto out; } |
f3f801486 nfsd: add the inf... |
2013 |
} |
2a4317c55 nfsd: add nfsd4_c... |
2014 |
|
2d77bf0a5 nfsd: change heur... |
2015 |
do_init: |
9a9c6478a nfsd: make NFSv4 ... |
2016 |
status = nn->client_tracking_ops->init(net); |
869216075 nfsd: re-order cl... |
2017 |
out: |
2a4317c55 nfsd: add nfsd4_c... |
2018 2019 2020 2021 |
if (status) { printk(KERN_WARNING "NFSD: Unable to initialize client " "recovery tracking! (%d) ", status); |
9a9c6478a nfsd: make NFSv4 ... |
2022 |
nn->client_tracking_ops = NULL; |
2a4317c55 nfsd: add nfsd4_c... |
2023 2024 2025 2026 2027 2028 2029 |
} return status; } void nfsd4_client_tracking_exit(struct net *net) { |
9a9c6478a nfsd: make NFSv4 ... |
2030 2031 2032 2033 2034 2035 |
struct nfsd_net *nn = net_generic(net, nfsd_net_id); if (nn->client_tracking_ops) { if (nn->client_tracking_ops->exit) nn->client_tracking_ops->exit(net); nn->client_tracking_ops = NULL; |
2a4317c55 nfsd: add nfsd4_c... |
2036 2037 2038 2039 2040 2041 |
} } void nfsd4_client_record_create(struct nfs4_client *clp) { |
9a9c6478a nfsd: make NFSv4 ... |
2042 2043 2044 2045 |
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); if (nn->client_tracking_ops) nn->client_tracking_ops->create(clp); |
2a4317c55 nfsd: add nfsd4_c... |
2046 2047 2048 2049 2050 |
} void nfsd4_client_record_remove(struct nfs4_client *clp) { |
9a9c6478a nfsd: make NFSv4 ... |
2051 2052 2053 2054 |
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); if (nn->client_tracking_ops) nn->client_tracking_ops->remove(clp); |
2a4317c55 nfsd: add nfsd4_c... |
2055 2056 2057 2058 2059 |
} int nfsd4_client_record_check(struct nfs4_client *clp) { |
9a9c6478a nfsd: make NFSv4 ... |
2060 2061 2062 2063 |
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); if (nn->client_tracking_ops) return nn->client_tracking_ops->check(clp); |
2a4317c55 nfsd: add nfsd4_c... |
2064 2065 2066 2067 2068 |
return -EOPNOTSUPP; } void |
919b8049f nfsd: remove redu... |
2069 |
nfsd4_record_grace_done(struct nfsd_net *nn) |
2a4317c55 nfsd: add nfsd4_c... |
2070 |
{ |
9a9c6478a nfsd: make NFSv4 ... |
2071 |
if (nn->client_tracking_ops) |
919b8049f nfsd: remove redu... |
2072 |
nn->client_tracking_ops->grace_done(nn); |
2a4317c55 nfsd: add nfsd4_c... |
2073 |
} |
813fd320c nfsd: add notifie... |
2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 |
static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event, void *ptr) { struct super_block *sb = ptr; struct net *net = sb->s_fs_info; struct nfsd_net *nn = net_generic(net, nfsd_net_id); struct cld_net *cn = nn->cld_net; struct dentry *dentry; int ret = 0; if (!try_module_get(THIS_MODULE)) return 0; if (!cn) { module_put(THIS_MODULE); return 0; } switch (event) { case RPC_PIPEFS_MOUNT: dentry = nfsd4_cld_register_sb(sb, cn->cn_pipe); if (IS_ERR(dentry)) { ret = PTR_ERR(dentry); break; } cn->cn_pipe->dentry = dentry; break; case RPC_PIPEFS_UMOUNT: if (cn->cn_pipe->dentry) nfsd4_cld_unregister_sb(cn->cn_pipe); break; default: ret = -ENOTSUPP; break; } module_put(THIS_MODULE); return ret; } |
2355c5964 nfsd4: fix missin... |
2113 |
static struct notifier_block nfsd4_cld_block = { |
813fd320c nfsd: add notifie... |
2114 2115 |
.notifier_call = rpc_pipefs_event, }; |
797a9d797 nfsd: only regist... |
2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 |
int register_cld_notifier(void) { return rpc_pipefs_notifier_register(&nfsd4_cld_block); } void unregister_cld_notifier(void) { rpc_pipefs_notifier_unregister(&nfsd4_cld_block); } |