diff options
| -rw-r--r-- | fs/lockd/svcsubs.c | 36 | ||||
| -rw-r--r-- | fs/nfsd/nfsctl.c | 33 | ||||
| -rw-r--r-- | include/linux/lockd/lockd.h | 7 |
3 files changed, 70 insertions, 6 deletions
diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c index dbbefbcd6712..1adcf93cb6e6 100644 --- a/fs/lockd/svcsubs.c +++ b/fs/lockd/svcsubs.c @@ -18,6 +18,8 @@ #include <linux/lockd/lockd.h> #include <linux/lockd/share.h> #include <linux/lockd/sm_inter.h> +#include <linux/module.h> +#include <linux/mount.h> #define NLMDBG_FACILITY NLMDBG_SVCSUBS @@ -230,7 +232,7 @@ nlm_file_inuse(struct nlm_file *file) * Loop over all files in the file table. */ static int -nlm_traverse_files(struct nlm_host *host, nlm_host_match_fn_t match) +nlm_traverse_files(void *data, nlm_host_match_fn_t match) { struct hlist_node *pos, *next; struct nlm_file *file; @@ -244,7 +246,7 @@ nlm_traverse_files(struct nlm_host *host, nlm_host_match_fn_t match) /* Traverse locks, blocks and shares of this file * and update file->f_locks count */ - if (nlm_inspect_file(host, file, match)) + if (nlm_inspect_file(data, file, match)) ret = 1; mutex_lock(&nlm_file_mutex); @@ -303,21 +305,27 @@ nlm_release_file(struct nlm_file *file) * Used by nlmsvc_invalidate_all */ static int -nlmsvc_mark_host(struct nlm_host *host, struct nlm_host *dummy) +nlmsvc_mark_host(void *data, struct nlm_host *dummy) { + struct nlm_host *host = data; + host->h_inuse = 1; return 0; } static int -nlmsvc_same_host(struct nlm_host *host, struct nlm_host *other) +nlmsvc_same_host(void *data, struct nlm_host *other) { + struct nlm_host *host = data; + return host == other; } static int -nlmsvc_is_client(struct nlm_host *host, struct nlm_host *dummy) +nlmsvc_is_client(void *data, struct nlm_host *dummy) { + struct nlm_host *host = data; + if (host->h_server) { /* we are destroying locks even though the client * hasn't asked us too, so don't unmonitor the @@ -370,3 +378,21 @@ nlmsvc_invalidate_all(void) */ nlm_traverse_files(NULL, nlmsvc_is_client); } + +static int +nlmsvc_match_ip(void *datap, struct nlm_host *host) +{ + __be32 *server_addr = datap; + + return host->h_saddr.sin_addr.s_addr == *server_addr; +} + +int +nlmsvc_unlock_all_by_ip(__be32 server_addr) +{ + int ret; + ret = nlm_traverse_files(&server_addr, nlmsvc_match_ip); + return ret ? -EIO : 0; + +} +EXPORT_SYMBOL_GPL(nlmsvc_unlock_all_by_ip); diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 613bcb8171a5..7706f6c9ab8a 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -22,6 +22,7 @@ #include <linux/seq_file.h> #include <linux/pagemap.h> #include <linux/init.h> +#include <linux/inet.h> #include <linux/string.h> #include <linux/smp_lock.h> #include <linux/ctype.h> @@ -35,6 +36,7 @@ #include <linux/nfsd/cache.h> #include <linux/nfsd/xdr.h> #include <linux/nfsd/syscall.h> +#include <linux/lockd/lockd.h> #include <asm/uaccess.h> #include <net/ipv6.h> @@ -53,6 +55,7 @@ enum { NFSD_Getfs, NFSD_List, NFSD_Fh, + NFSD_FO_UnlockIP, NFSD_Threads, NFSD_Pool_Threads, NFSD_Versions, @@ -89,6 +92,8 @@ static ssize_t write_leasetime(struct file *file, char *buf, size_t size); static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); #endif +static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size); + static ssize_t (*write_op[])(struct file *, char *, size_t) = { [NFSD_Svc] = write_svc, [NFSD_Add] = write_add, @@ -98,6 +103,7 @@ static ssize_t (*write_op[])(struct file *, char *, size_t) = { [NFSD_Getfd] = write_getfd, [NFSD_Getfs] = write_getfs, [NFSD_Fh] = write_filehandle, + [NFSD_FO_UnlockIP] = failover_unlock_ip, [NFSD_Threads] = write_threads, [NFSD_Pool_Threads] = write_pool_threads, [NFSD_Versions] = write_versions, @@ -298,6 +304,31 @@ static ssize_t write_getfd(struct file *file, char *buf, size_t size) return err; } +static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size) +{ + __be32 server_ip; + char *fo_path, c; + int b1, b2, b3, b4; + + /* sanity check */ + if (size == 0) + return -EINVAL; + + if (buf[size-1] != '\n') + return -EINVAL; + + fo_path = buf; + if (qword_get(&buf, fo_path, size) < 0) + return -EINVAL; + + /* get ipv4 address */ + if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) + return -EINVAL; + server_ip = htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4); + + return nlmsvc_unlock_all_by_ip(server_ip); +} + static ssize_t write_filehandle(struct file *file, char *buf, size_t size) { /* request is: @@ -700,6 +731,8 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent) [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, + [NFSD_FO_UnlockIP] = {"unlock_ip", + &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index 94649a8da014..bcb93fc1fce7 100644 --- a/include/linux/lockd/lockd.h +++ b/include/linux/lockd/lockd.h @@ -194,7 +194,7 @@ void nsm_release(struct nsm_handle *); * This is used in garbage collection and resource reclaim * A return value != 0 means destroy the lock/block/share */ -typedef int (*nlm_host_match_fn_t)(struct nlm_host *cur, struct nlm_host *ref); +typedef int (*nlm_host_match_fn_t)(void *cur, struct nlm_host *ref); /* * Server-side lock handling @@ -220,6 +220,11 @@ void nlmsvc_mark_resources(void); void nlmsvc_free_host_resources(struct nlm_host *); void nlmsvc_invalidate_all(void); +/* + * Cluster failover support + */ +int nlmsvc_unlock_all_by_ip(__be32 server_addr); + static inline struct inode *nlmsvc_file_inode(struct nlm_file *file) { return file->f_file->f_path.dentry->d_inode; |