- cred = nfsi->cache_access.cred;
- if (cred)
- put_rpccred(cred);
- BUG_ON(atomic_read(&nfsi->data_updates) != 0);
-}
-
-void
-nfs_umount_begin(struct super_block *sb)
-{
- struct rpc_clnt *rpc = NFS_SB(sb)->client;
-
- /* -EIO all pending I/O */
- if (!IS_ERR(rpc))
- rpc_killall_tasks(rpc);
- rpc = NFS_SB(sb)->client_acl;
- if (!IS_ERR(rpc))
- rpc_killall_tasks(rpc);
-}
-
-
-static inline unsigned long
-nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
-{
- /* make sure blocksize is a power of two */
- if ((bsize & (bsize - 1)) || nrbitsp) {
- unsigned char nrbits;
-
- for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
- ;
- bsize = 1 << nrbits;
- if (nrbitsp)
- *nrbitsp = nrbits;
- }
-
- return bsize;
-}
-
-/*
- * Calculate the number of 512byte blocks used.
- */
-static inline unsigned long
-nfs_calc_block_size(u64 tsize)
-{
- loff_t used = (tsize + 511) >> 9;
- return (used > ULONG_MAX) ? ULONG_MAX : used;
-}
-
-/*
- * Compute and set NFS server blocksize
- */
-static inline unsigned long
-nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
-{
- if (bsize < NFS_MIN_FILE_IO_SIZE)
- bsize = NFS_DEF_FILE_IO_SIZE;
- else if (bsize >= NFS_MAX_FILE_IO_SIZE)
- bsize = NFS_MAX_FILE_IO_SIZE;
-
- return nfs_block_bits(bsize, nrbitsp);
-}
-
-/*
- * Obtain the root inode of the file system.
- */
-static struct inode *
-nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
-{
- struct nfs_server *server = NFS_SB(sb);
- struct inode *rooti;
- int error;
-
- error = server->rpc_ops->getroot(server, rootfh, fsinfo);
- if (error < 0) {
- dprintk("nfs_get_root: getattr error = %d\n", -error);
- return ERR_PTR(error);
- }
-
- rooti = nfs_fhget(sb, rootfh, fsinfo->fattr);
- if (!rooti)
- return ERR_PTR(-ENOMEM);
- return rooti;
-}
-
-/*
- * Do NFS version-independent mount processing, and sanity checking
- */
-static int
-nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
-{
- struct nfs_server *server;
- struct inode *root_inode;
- struct nfs_fattr fattr;
- struct nfs_fsinfo fsinfo = {
- .fattr = &fattr,
- };
- struct nfs_pathconf pathinfo = {
- .fattr = &fattr,
- };
- int no_root_error = 0;
- unsigned long max_rpc_payload;
-
- /* We probably want something more informative here */
- snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
-
- server = NFS_SB(sb);
-
- sb->s_magic = NFS_SUPER_MAGIC;
-
- root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
- /* Did getting the root inode fail? */
- if (IS_ERR(root_inode)) {
- no_root_error = PTR_ERR(root_inode);
- goto out_no_root;
- }
- sb->s_root = d_alloc_root(root_inode);
- if (!sb->s_root) {
- no_root_error = -ENOMEM;
- goto out_no_root;
- }
- sb->s_root->d_op = server->rpc_ops->dentry_ops;
-
- /* Get some general file system info */
- if (server->namelen == 0 &&
- server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
- server->namelen = pathinfo.max_namelen;
- /* Work out a lot of parameters */
- if (server->rsize == 0)
- server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
- if (server->wsize == 0)
- server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
-
- if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
- server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
- if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
- server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
-
- max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
- if (server->rsize > max_rpc_payload)
- server->rsize = max_rpc_payload;
- if (server->rsize > NFS_MAX_FILE_IO_SIZE)
- server->rsize = NFS_MAX_FILE_IO_SIZE;
- server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
- if (server->wsize > max_rpc_payload)
- server->wsize = max_rpc_payload;
- if (server->wsize > NFS_MAX_FILE_IO_SIZE)
- server->wsize = NFS_MAX_FILE_IO_SIZE;
- server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
- if (sb->s_blocksize == 0)
- sb->s_blocksize = nfs_block_bits(server->wsize,
- &sb->s_blocksize_bits);
- server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
-
- server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
- if (server->dtsize > PAGE_CACHE_SIZE)
- server->dtsize = PAGE_CACHE_SIZE;
- if (server->dtsize > server->rsize)
- server->dtsize = server->rsize;
-
- if (server->flags & NFS_MOUNT_NOAC) {
- server->acregmin = server->acregmax = 0;
- server->acdirmin = server->acdirmax = 0;
- sb->s_flags |= MS_SYNCHRONOUS;
- }
- server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
-
- if (server->flags & NFS_MOUNT_TAGXID)
- sb->s_flags |= MS_TAGXID;
-
- sb->s_maxbytes = fsinfo.maxfilesize;
- if (sb->s_maxbytes > MAX_LFS_FILESIZE)
- sb->s_maxbytes = MAX_LFS_FILESIZE;
-
- server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
- server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
- server->client->cl_tagxid = (server->flags & NFS_MOUNT_TAGXID) ? 1 : 0;
-
- /* We're airborne Set socket buffersize */
- rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
- return 0;
- /* Yargs. It didn't work out. */
-out_no_root:
- dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
- if (!IS_ERR(root_inode))
- iput(root_inode);
- return no_root_error;
-}
-
-static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
-{
- to->to_initval = timeo * HZ / 10;
- to->to_retries = retrans;
- if (!to->to_retries)
- to->to_retries = 2;
-
- switch (proto) {
- case IPPROTO_TCP:
- if (!to->to_initval)
- to->to_initval = 60 * HZ;
- if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
- to->to_initval = NFS_MAX_TCP_TIMEOUT;
- to->to_increment = to->to_initval;
- to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
- to->to_exponential = 0;
- break;
- case IPPROTO_UDP:
- default:
- if (!to->to_initval)
- to->to_initval = 11 * HZ / 10;
- if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
- to->to_initval = NFS_MAX_UDP_TIMEOUT;
- to->to_maxval = NFS_MAX_UDP_TIMEOUT;
- to->to_exponential = 1;
- break;
- }
-}
-
-/*
- * Create an RPC client handle.
- */
-static struct rpc_clnt *
-nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
-{
- struct rpc_timeout timeparms;
- struct rpc_xprt *xprt = NULL;
- struct rpc_clnt *clnt = NULL;
- int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
-
- nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
-
- /* create transport and client */
- xprt = xprt_create_proto(proto, &server->addr, &timeparms);
- if (IS_ERR(xprt)) {
- dprintk("%s: cannot create RPC transport. Error = %ld\n",
- __FUNCTION__, PTR_ERR(xprt));
- return (struct rpc_clnt *)xprt;
- }
- clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
- server->rpc_ops->version, data->pseudoflavor);
- if (IS_ERR(clnt)) {
- dprintk("%s: cannot create RPC client. Error = %ld\n",
- __FUNCTION__, PTR_ERR(xprt));
- goto out_fail;
- }
-
- clnt->cl_intr = 1;
- clnt->cl_softrtry = 1;
- clnt->cl_tagxid = 1;
-
- return clnt;
-
-out_fail:
- return clnt;
-}
-
-/*
- * The way this works is that the mount process passes a structure
- * in the data argument which contains the server's IP address
- * and the root file handle obtained from the server's mount
- * daemon. We stash these away in the private superblock fields.
- */
-static int
-nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
-{
- struct nfs_server *server;
- rpc_authflavor_t authflavor;
-
- server = NFS_SB(sb);
- sb->s_blocksize_bits = 0;
- sb->s_blocksize = 0;
- if (data->bsize)
- sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
- if (data->rsize)
- server->rsize = nfs_block_size(data->rsize, NULL);
- if (data->wsize)
- server->wsize = nfs_block_size(data->wsize, NULL);
- server->flags = data->flags & NFS_MOUNT_FLAGMASK;
-
- server->acregmin = data->acregmin*HZ;
- server->acregmax = data->acregmax*HZ;
- server->acdirmin = data->acdirmin*HZ;
- server->acdirmax = data->acdirmax*HZ;
-
- /* Start lockd here, before we might error out */
- if (!(server->flags & NFS_MOUNT_NONLM))
- lockd_up();
-
- server->namelen = data->namlen;
- server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
- if (!server->hostname)
- return -ENOMEM;
- strcpy(server->hostname, data->hostname);
-
- /* Check NFS protocol revision and initialize RPC op vector
- * and file handle pool. */
-#ifdef CONFIG_NFS_V3
- if (server->flags & NFS_MOUNT_VER3) {
- server->rpc_ops = &nfs_v3_clientops;
- server->caps |= NFS_CAP_READDIRPLUS;
- } else {
- server->rpc_ops = &nfs_v2_clientops;
- }
-#else
- server->rpc_ops = &nfs_v2_clientops;
-#endif
-
- /* Fill in pseudoflavor for mount version < 5 */
- if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
- data->pseudoflavor = RPC_AUTH_UNIX;
- authflavor = data->pseudoflavor; /* save for sb_init() */
- /* XXX maybe we want to add a server->pseudoflavor field */
-
- /* Create RPC client handles */
- server->client = nfs_create_client(server, data);
- if (IS_ERR(server->client))
- return PTR_ERR(server->client);
- /* RFC 2623, sec 2.3.2 */
- if (authflavor != RPC_AUTH_UNIX) {
- struct rpc_auth *auth;
-
- server->client_sys = rpc_clone_client(server->client);
- if (IS_ERR(server->client_sys))
- return PTR_ERR(server->client_sys);
- auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
- if (IS_ERR(auth))
- return PTR_ERR(auth);
- } else {
- atomic_inc(&server->client->cl_count);
- server->client_sys = server->client;
- }
- if (server->flags & NFS_MOUNT_VER3) {
-#ifdef CONFIG_NFS_V3_ACL
- if (!(server->flags & NFS_MOUNT_NOACL)) {
- server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
- /* No errors! Assume that Sun nfsacls are supported */
- if (!IS_ERR(server->client_acl))
- server->caps |= NFS_CAP_ACLS;
- }
-#else
- server->flags &= ~NFS_MOUNT_NOACL;
-#endif /* CONFIG_NFS_V3_ACL */
- /*
- * The VFS shouldn't apply the umask to mode bits. We will
- * do so ourselves when necessary.
- */
- sb->s_flags |= MS_POSIXACL;
- if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
- server->namelen = NFS3_MAXNAMLEN;
- sb->s_time_gran = 1;
- } else {
- if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
- server->namelen = NFS2_MAXNAMLEN;
- }
-
- sb->s_op = &nfs_sops;
- return nfs_sb_init(sb, authflavor);
-}
-
-static int
-nfs_statfs(struct super_block *sb, struct kstatfs *buf)
-{
- struct nfs_server *server = NFS_SB(sb);
- unsigned char blockbits;
- unsigned long blockres;
- struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
- struct nfs_fattr fattr;
- struct nfs_fsstat res = {
- .fattr = &fattr,
- };
- int error;
-
- lock_kernel();
-
- error = server->rpc_ops->statfs(server, rootfh, &res);
- buf->f_type = NFS_SUPER_MAGIC;
- if (error < 0)
- goto out_err;
-
- /*
- * Current versions of glibc do not correctly handle the
- * case where f_frsize != f_bsize. Eventually we want to
- * report the value of wtmult in this field.
- */
- buf->f_frsize = sb->s_blocksize;
-
- /*
- * On most *nix systems, f_blocks, f_bfree, and f_bavail
- * are reported in units of f_frsize. Linux hasn't had
- * an f_frsize field in its statfs struct until recently,
- * thus historically Linux's sys_statfs reports these
- * fields in units of f_bsize.
- */
- buf->f_bsize = sb->s_blocksize;
- blockbits = sb->s_blocksize_bits;
- blockres = (1 << blockbits) - 1;
- buf->f_blocks = (res.tbytes + blockres) >> blockbits;
- buf->f_bfree = (res.fbytes + blockres) >> blockbits;
- buf->f_bavail = (res.abytes + blockres) >> blockbits;
-
- buf->f_files = res.tfiles;
- buf->f_ffree = res.afiles;
-
- buf->f_namelen = server->namelen;
- out:
- unlock_kernel();
- return 0;
-
- out_err:
- dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
- buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
- goto out;
-
-}
-
-static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
-{
- static struct proc_nfs_info {
- int flag;
- char *str;
- char *nostr;
- } nfs_info[] = {
- { NFS_MOUNT_SOFT, ",soft", ",hard" },
- { NFS_MOUNT_INTR, ",intr", "" },
- { NFS_MOUNT_POSIX, ",posix", "" },
- { NFS_MOUNT_NOCTO, ",nocto", "" },
- { NFS_MOUNT_NOAC, ",noac", "" },
- { NFS_MOUNT_NONLM, ",nolock", ",lock" },
- { NFS_MOUNT_NOACL, ",noacl", "" },
- { NFS_MOUNT_TAGXID, ",tagxid", "" },
- { 0, NULL, NULL }
- };
- struct proc_nfs_info *nfs_infop;
- struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
- char buf[12];
- char *proto;
-
- seq_printf(m, ",v%d", nfss->rpc_ops->version);
- seq_printf(m, ",rsize=%d", nfss->rsize);
- seq_printf(m, ",wsize=%d", nfss->wsize);
- if (nfss->acregmin != 3*HZ)
- seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
- if (nfss->acregmax != 60*HZ)
- seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
- if (nfss->acdirmin != 30*HZ)
- seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
- if (nfss->acdirmax != 60*HZ)
- seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
- for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
- if (nfss->flags & nfs_infop->flag)
- seq_puts(m, nfs_infop->str);
- else
- seq_puts(m, nfs_infop->nostr);
- }
- switch (nfss->client->cl_xprt->prot) {
- case IPPROTO_TCP:
- proto = "tcp";
- break;
- case IPPROTO_UDP:
- proto = "udp";
- break;
- default:
- snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
- proto = buf;
- }
- seq_printf(m, ",proto=%s", proto);
- seq_puts(m, ",addr=");
- seq_escape(m, nfss->hostname, " \t\n\\");
- return 0;