From: Stanislav Kinsbursky Date: Wed, 14 Nov 2012 15:21:16 +0000 (+0300) Subject: nfsd: make reclaim_str_hashtbl allocated per net X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=52e19c09a183d82d99f10c284bc8b27933b1d1fc;p=openwrt%2Fstaging%2Fblogic.git nfsd: make reclaim_str_hashtbl allocated per net This hash holds nfs4_clients info, which are network namespace aware. So let's make it allocated per network namespace. Note: this hash is used only by legacy tracker. So let's allocate hash in tracker init. Signed-off-by: Stanislav Kinsbursky Signed-off-by: J. Bruce Fields --- diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index 65c2431ea32f..49e54790d862 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -24,6 +24,11 @@ #include #include +/* Hash tables for nfs4_clientid state */ +#define CLIENT_HASH_BITS 4 +#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) +#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) + struct cld_net; struct nfsd_net { @@ -38,6 +43,13 @@ struct nfsd_net { struct lock_manager nfsd4_manager; bool grace_ended; time_t boot_time; + + /* + * reclaim_str_hashtbl[] holds known client info from previous reset/reboot + * used in reboot/reset lease grace period processing + */ + struct list_head *reclaim_str_hashtbl; + int reclaim_str_hashtbl_size; }; extern int nfsd_net_id; diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 9881bcad264b..376692ab1b3b 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -176,6 +176,7 @@ nfsd4_create_clid_dir(struct nfs4_client *clp) struct dentry *dir, *dentry; struct nfs4_client_reclaim *crp; int status; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname); @@ -222,7 +223,7 @@ out_unlock: mutex_unlock(&dir->d_inode->i_mutex); if (status == 0) { if (in_grace) { - crp = nfs4_client_to_reclaim(dname); + crp = nfs4_client_to_reclaim(dname, nn); if (crp) crp->cr_clp = clp; } @@ -237,7 +238,7 @@ out_unlock: nfs4_reset_creds(original_cred); } -typedef int (recdir_func)(struct dentry *, struct dentry *); +typedef int (recdir_func)(struct dentry *, struct dentry *, struct nfsd_net *); struct name_list { char name[HEXDIR_LEN]; @@ -263,7 +264,7 @@ nfsd4_build_namelist(void *arg, const char *name, int namlen, } static int -nfsd4_list_rec_dir(recdir_func *f) +nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn) { const struct cred *original_cred; struct dentry *dir = rec_file->f_path.dentry; @@ -292,7 +293,7 @@ nfsd4_list_rec_dir(recdir_func *f) status = PTR_ERR(dentry); break; } - status = f(dir, dentry); + status = f(dir, dentry, nn); dput(dentry); } list_del(&entry->list); @@ -336,6 +337,7 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp) struct nfs4_client_reclaim *crp; char dname[HEXDIR_LEN]; int status; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); if (!rec_file || !test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return; @@ -359,9 +361,9 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp) vfs_fsync(rec_file, 0); if (in_grace) { /* remove reclaim record */ - crp = nfsd4_find_reclaim_client(dname); + crp = nfsd4_find_reclaim_client(dname, nn); if (crp) - nfs4_remove_reclaim_record(crp); + nfs4_remove_reclaim_record(crp, nn); } } out_drop_write: @@ -373,11 +375,11 @@ out: } static int -purge_old(struct dentry *parent, struct dentry *child) +purge_old(struct dentry *parent, struct dentry *child, struct nfsd_net *nn) { int status; - if (nfs4_has_reclaimed_state(child->d_name.name)) + if (nfs4_has_reclaimed_state(child->d_name.name, nn)) return 0; status = vfs_rmdir(parent->d_inode, child); @@ -392,6 +394,7 @@ static void nfsd4_recdir_purge_old(struct net *net, time_t boot_time) { int status; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); in_grace = false; if (!rec_file) @@ -399,19 +402,19 @@ nfsd4_recdir_purge_old(struct net *net, time_t boot_time) status = mnt_want_write_file(rec_file); if (status) goto out; - status = nfsd4_list_rec_dir(purge_old); + status = nfsd4_list_rec_dir(purge_old, nn); if (status == 0) vfs_fsync(rec_file, 0); mnt_drop_write_file(rec_file); out: - nfs4_release_reclaim(); + nfs4_release_reclaim(nn); if (status) printk("nfsd4: failed to purge old clients from recovery" " directory %s\n", rec_file->f_path.dentry->d_name.name); } static int -load_recdir(struct dentry *parent, struct dentry *child) +load_recdir(struct dentry *parent, struct dentry *child, struct nfsd_net *nn) { if (child->d_name.len != HEXDIR_LEN - 1) { printk("nfsd4: illegal name %s in recovery directory\n", @@ -419,18 +422,19 @@ load_recdir(struct dentry *parent, struct dentry *child) /* Keep trying; maybe the others are OK: */ return 0; } - nfs4_client_to_reclaim(child->d_name.name); + nfs4_client_to_reclaim(child->d_name.name, nn); return 0; } static int -nfsd4_recdir_load(void) { +nfsd4_recdir_load(struct net *net) { int status; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); if (!rec_file) return 0; - status = nfsd4_list_rec_dir(load_recdir); + status = nfsd4_list_rec_dir(load_recdir, nn); if (status) printk("nfsd4: failed loading clients from recovery" " directory %s\n", rec_file->f_path.dentry->d_name.name); @@ -474,11 +478,53 @@ nfsd4_init_recdir(void) return status; } + +static int +nfs4_legacy_state_init(struct net *net) +{ + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + int i; + + nn->reclaim_str_hashtbl = kmalloc(sizeof(struct list_head) * + CLIENT_HASH_SIZE, 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; + + 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); +} + static int nfsd4_load_reboot_recovery_data(struct net *net) { int status; + nfs4_lock_state(); + status = nfsd4_init_recdir(); + if (!status) + status = nfsd4_recdir_load(net); + nfs4_unlock_state(); + if (status) + printk(KERN_ERR "NFSD: Failure reading reboot recovery data\n"); + return status; +} + +static int +nfsd4_legacy_tracking_init(struct net *net) +{ + int status; + /* XXX: The legacy code won't work in a container */ if (net != &init_net) { WARN(1, KERN_ERR "NFSD: attempt to initialize legacy client " @@ -486,13 +532,17 @@ nfsd4_load_reboot_recovery_data(struct net *net) return -EINVAL; } - nfs4_lock_state(); - status = nfsd4_init_recdir(); - if (!status) - status = nfsd4_recdir_load(); - nfs4_unlock_state(); + status = nfs4_legacy_state_init(net); if (status) - printk(KERN_ERR "NFSD: Failure reading reboot recovery data\n"); + return status; + + status = nfsd4_load_reboot_recovery_data(net); + if (status) + goto err; + return 0; + +err: + nfs4_legacy_state_shutdown(net); return status; } @@ -508,8 +558,11 @@ nfsd4_shutdown_recdir(void) static void nfsd4_legacy_tracking_exit(struct net *net) { - nfs4_release_reclaim(); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + nfs4_release_reclaim(nn); nfsd4_shutdown_recdir(); + nfs4_legacy_state_shutdown(net); } /* @@ -545,6 +598,7 @@ nfsd4_check_legacy_client(struct nfs4_client *clp) int status; char dname[HEXDIR_LEN]; struct nfs4_client_reclaim *crp; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); /* did we already find that this client is stable? */ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) @@ -557,7 +611,7 @@ nfsd4_check_legacy_client(struct nfs4_client *clp) } /* look for it in the reclaim hashtable otherwise */ - crp = nfsd4_find_reclaim_client(dname); + crp = nfsd4_find_reclaim_client(dname, nn); if (crp) { set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); crp->cr_clp = clp; @@ -568,7 +622,7 @@ nfsd4_check_legacy_client(struct nfs4_client *clp) } static struct nfsd4_client_tracking_ops nfsd4_legacy_tracking_ops = { - .init = nfsd4_load_reboot_recovery_data, + .init = nfsd4_legacy_tracking_init, .exit = nfsd4_legacy_tracking_exit, .create = nfsd4_create_clid_dir, .remove = nfsd4_remove_clid_dir, diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 001bbc99d7a4..ba4785559509 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -393,11 +393,6 @@ unhash_delegation(struct nfs4_delegation *dp) /* client_lock protects the client lru list and session hash table */ static DEFINE_SPINLOCK(client_lock); -/* Hash tables for nfs4_clientid state */ -#define CLIENT_HASH_BITS 4 -#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) -#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) - static unsigned int clientid_hashval(u32 id) { return id & CLIENT_HASH_MASK; @@ -409,11 +404,8 @@ static unsigned int clientstr_hashval(const char *name) } /* - * reclaim_str_hashtbl[] holds known client info from previous reset/reboot - * used in reboot/reset lease grace period processing - * * conf_id_hashtbl[], and conf_name_tree hold confirmed - * setclientid_confirmed info. + * setclientid_confirmed info. * * unconf_id_hashtbl[] and unconf_name_tree hold unconfirmed * setclientid info. @@ -426,8 +418,6 @@ static unsigned int clientstr_hashval(const char *name) * * All of the above fields are protected by the client_mutex. */ -static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; -static int reclaim_str_hashtbl_size = 0; static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; static struct rb_root conf_name_tree; @@ -4509,11 +4499,11 @@ alloc_reclaim(void) } bool -nfs4_has_reclaimed_state(const char *name) +nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) { struct nfs4_client_reclaim *crp; - crp = nfsd4_find_reclaim_client(name); + crp = nfsd4_find_reclaim_client(name, nn); return (crp && crp->cr_clp); } @@ -4521,7 +4511,7 @@ nfs4_has_reclaimed_state(const char *name) * failure => all reset bets are off, nfserr_no_grace... */ struct nfs4_client_reclaim * -nfs4_client_to_reclaim(const char *name) +nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) { unsigned int strhashval; struct nfs4_client_reclaim *crp; @@ -4531,42 +4521,42 @@ nfs4_client_to_reclaim(const char *name) if (crp) { strhashval = clientstr_hashval(name); INIT_LIST_HEAD(&crp->cr_strhash); - list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); + list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); memcpy(crp->cr_recdir, name, HEXDIR_LEN); crp->cr_clp = NULL; - reclaim_str_hashtbl_size++; + nn->reclaim_str_hashtbl_size++; } return crp; } void -nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp) +nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) { list_del(&crp->cr_strhash); kfree(crp); - reclaim_str_hashtbl_size--; + nn->reclaim_str_hashtbl_size--; } void -nfs4_release_reclaim(void) +nfs4_release_reclaim(struct nfsd_net *nn) { struct nfs4_client_reclaim *crp = NULL; int i; for (i = 0; i < CLIENT_HASH_SIZE; i++) { - while (!list_empty(&reclaim_str_hashtbl[i])) { - crp = list_entry(reclaim_str_hashtbl[i].next, + while (!list_empty(&nn->reclaim_str_hashtbl[i])) { + crp = list_entry(nn->reclaim_str_hashtbl[i].next, struct nfs4_client_reclaim, cr_strhash); - nfs4_remove_reclaim_record(crp); + nfs4_remove_reclaim_record(crp, nn); } } - BUG_ON(reclaim_str_hashtbl_size); + BUG_ON(nn->reclaim_str_hashtbl_size); } /* * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ struct nfs4_client_reclaim * -nfsd4_find_reclaim_client(const char *recdir) +nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) { unsigned int strhashval; struct nfs4_client_reclaim *crp = NULL; @@ -4574,7 +4564,7 @@ nfsd4_find_reclaim_client(const char *recdir) dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); strhashval = clientstr_hashval(recdir); - list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { + list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { if (same_name(crp->cr_recdir, recdir)) { return crp; } @@ -4732,7 +4722,6 @@ nfs4_state_init(void) for (i = 0; i < CLIENT_HASH_SIZE; i++) { INIT_LIST_HEAD(&conf_id_hashtbl[i]); INIT_LIST_HEAD(&unconf_id_hashtbl[i]); - INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); } conf_name_tree = RB_ROOT; unconf_name_tree = RB_ROOT; @@ -4749,7 +4738,6 @@ nfs4_state_init(void) INIT_LIST_HEAD(&close_lru); INIT_LIST_HEAD(&client_lru); INIT_LIST_HEAD(&del_recall_lru); - reclaim_str_hashtbl_size = 0; } /* diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index ca8ee8c3ae74..26a912cdfe0c 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -466,9 +466,10 @@ extern __be32 nfs4_preprocess_stateid_op(struct net *net, stateid_t *stateid, int flags, struct file **filp); extern void nfs4_lock_state(void); extern void nfs4_unlock_state(void); -void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *); -extern void nfs4_release_reclaim(void); -extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir); +void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *); +extern void nfs4_release_reclaim(struct nfsd_net *); +extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir, + struct nfsd_net *nn); extern __be32 nfs4_check_open_reclaim(clientid_t *clid, bool sessions); extern void nfs4_free_openowner(struct nfs4_openowner *); extern void nfs4_free_lockowner(struct nfs4_lockowner *); @@ -482,8 +483,9 @@ extern int nfsd4_create_callback_queue(void); extern void nfsd4_destroy_callback_queue(void); extern void nfsd4_shutdown_callback(struct nfs4_client *); extern void nfs4_put_delegation(struct nfs4_delegation *dp); -extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name); -extern bool nfs4_has_reclaimed_state(const char *name); +extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name, + struct nfsd_net *nn); +extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn); extern void release_session_client(struct nfsd4_session *); extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *);