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author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-10-15 19:54:56 (GMT) |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-10-15 19:54:56 (GMT) |
commit | 6925bac120097b823fc990c143b9789c21cc60b5 (patch) | |
tree | 0f92e1b22122fba623aeff4c271c16df673244eb /fs/nfs/super.c | |
parent | 04ab591808565f968d4406f6435090ad671ebdab (diff) | |
parent | 011935a0a710c20bb7ae63523b78856848db1926 (diff) | |
download | linux-fsl-qoriq-6925bac120097b823fc990c143b9789c21cc60b5.tar.xz |
Merge branch 'next'
Diffstat (limited to 'fs/nfs/super.c')
-rw-r--r-- | fs/nfs/super.c | 126 |
1 files changed, 76 insertions, 50 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c index ffb6974..8b28b95 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -91,6 +91,7 @@ enum { /* Mount options that take string arguments */ Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, Opt_addr, Opt_mountaddr, Opt_clientaddr, + Opt_lookupcache, /* Special mount options */ Opt_userspace, Opt_deprecated, Opt_sloppy, @@ -154,6 +155,8 @@ static const match_table_t nfs_mount_option_tokens = { { Opt_mounthost, "mounthost=%s" }, { Opt_mountaddr, "mountaddr=%s" }, + { Opt_lookupcache, "lookupcache=%s" }, + { Opt_err, NULL } }; @@ -200,6 +203,22 @@ static const match_table_t nfs_secflavor_tokens = { { Opt_sec_err, NULL } }; +enum { + Opt_lookupcache_all, Opt_lookupcache_positive, + Opt_lookupcache_none, + + Opt_lookupcache_err +}; + +static match_table_t nfs_lookupcache_tokens = { + { Opt_lookupcache_all, "all" }, + { Opt_lookupcache_positive, "pos" }, + { Opt_lookupcache_positive, "positive" }, + { Opt_lookupcache_none, "none" }, + + { Opt_lookupcache_err, NULL } +}; + static void nfs_umount_begin(struct super_block *); static int nfs_statfs(struct dentry *, struct kstatfs *); @@ -209,7 +228,6 @@ static int nfs_get_sb(struct file_system_type *, int, const char *, void *, stru static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); static void nfs_kill_super(struct super_block *); -static void nfs_put_super(struct super_block *); static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); static struct file_system_type nfs_fs_type = { @@ -232,7 +250,6 @@ static const struct super_operations nfs_sops = { .alloc_inode = nfs_alloc_inode, .destroy_inode = nfs_destroy_inode, .write_inode = nfs_write_inode, - .put_super = nfs_put_super, .statfs = nfs_statfs, .clear_inode = nfs_clear_inode, .umount_begin = nfs_umount_begin, @@ -337,26 +354,20 @@ void __exit unregister_nfs_fs(void) unregister_filesystem(&nfs_fs_type); } -void nfs_sb_active(struct nfs_server *server) +void nfs_sb_active(struct super_block *sb) { - atomic_inc(&server->active); -} + struct nfs_server *server = NFS_SB(sb); -void nfs_sb_deactive(struct nfs_server *server) -{ - if (atomic_dec_and_test(&server->active)) - wake_up(&server->active_wq); + if (atomic_inc_return(&server->active) == 1) + atomic_inc(&sb->s_active); } -static void nfs_put_super(struct super_block *sb) +void nfs_sb_deactive(struct super_block *sb) { struct nfs_server *server = NFS_SB(sb); - /* - * Make sure there are no outstanding ops to this server. - * If so, wait for them to finish before allowing the - * unmount to continue. - */ - wait_event(server->active_wq, atomic_read(&server->active) == 0); + + if (atomic_dec_and_test(&server->active)) + deactivate_super(sb); } /* @@ -664,25 +675,6 @@ static void nfs_umount_begin(struct super_block *sb) } /* - * Set the port number in an address. Be agnostic about the address family. - */ -static void nfs_set_port(struct sockaddr *sap, unsigned short port) -{ - switch (sap->sa_family) { - case AF_INET: { - struct sockaddr_in *ap = (struct sockaddr_in *)sap; - ap->sin_port = htons(port); - break; - } - case AF_INET6: { - struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap; - ap->sin6_port = htons(port); - break; - } - } -} - -/* * Sanity-check a server address provided by the mount command. * * Address family must be initialized, and address must not be @@ -724,20 +716,22 @@ static void nfs_parse_ipv4_address(char *string, size_t str_len, *addr_len = 0; } -#define IPV6_SCOPE_DELIMITER '%' - #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) -static void nfs_parse_ipv6_scope_id(const char *string, const size_t str_len, - const char *delim, - struct sockaddr_in6 *sin6) +static int nfs_parse_ipv6_scope_id(const char *string, const size_t str_len, + const char *delim, + struct sockaddr_in6 *sin6) { char *p; size_t len; - if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) - return ; + if ((string + str_len) == delim) + return 1; + if (*delim != IPV6_SCOPE_DELIMITER) - return; + return 0; + + if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) + return 0; len = (string + str_len) - delim - 1; p = kstrndup(delim + 1, len, GFP_KERNEL); @@ -750,14 +744,20 @@ static void nfs_parse_ipv6_scope_id(const char *string, const size_t str_len, scope_id = dev->ifindex; dev_put(dev); } else { - /* scope_id is set to zero on error */ - strict_strtoul(p, 10, &scope_id); + if (strict_strtoul(p, 10, &scope_id) == 0) { + kfree(p); + return 0; + } } kfree(p); + sin6->sin6_scope_id = scope_id; dfprintk(MOUNT, "NFS: IPv6 scope ID = %lu\n", scope_id); + return 1; } + + return 0; } static void nfs_parse_ipv6_address(char *string, size_t str_len, @@ -773,9 +773,11 @@ static void nfs_parse_ipv6_address(char *string, size_t str_len, sin6->sin6_family = AF_INET6; *addr_len = sizeof(*sin6); - if (in6_pton(string, str_len, addr, IPV6_SCOPE_DELIMITER, &delim)) { - nfs_parse_ipv6_scope_id(string, str_len, delim, sin6); - return; + if (in6_pton(string, str_len, addr, + IPV6_SCOPE_DELIMITER, &delim) != 0) { + if (nfs_parse_ipv6_scope_id(string, str_len, + delim, sin6) != 0) + return; } } @@ -798,7 +800,7 @@ static void nfs_parse_ipv6_address(char *string, size_t str_len, * If there is a problem constructing the new sockaddr, set the address * family to AF_UNSPEC. */ -static void nfs_parse_ip_address(char *string, size_t str_len, +void nfs_parse_ip_address(char *string, size_t str_len, struct sockaddr *sap, size_t *addr_len) { unsigned int i, colons; @@ -1258,6 +1260,30 @@ static int nfs_parse_mount_options(char *raw, &mnt->mount_server.addrlen); kfree(string); break; + case Opt_lookupcache: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + token = match_token(string, + nfs_lookupcache_tokens, args); + kfree(string); + switch (token) { + case Opt_lookupcache_all: + mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); + break; + case Opt_lookupcache_positive: + mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; + mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; + break; + case Opt_lookupcache_none: + mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; + break; + default: + errors++; + dfprintk(MOUNT, "NFS: invalid " + "lookupcache argument\n"); + }; + break; /* * Special options @@ -1558,7 +1584,7 @@ static int nfs_validate_mount_data(void *options, * Translate to nfs_parsed_mount_data, which nfs_fill_super * can deal with. */ - args->flags = data->flags; + args->flags = data->flags & NFS_MOUNT_FLAGMASK; args->rsize = data->rsize; args->wsize = data->wsize; args->timeo = data->timeo; |