diff options
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/Makefile | 5 | ||||
| -rw-r--r-- | fs/nfs/callback.c | 2 | ||||
| -rw-r--r-- | fs/nfs/direct.c | 6 | ||||
| -rw-r--r-- | fs/nfs/inode.c | 1793 | ||||
| -rw-r--r-- | fs/nfs/internal.h | 179 | ||||
| -rw-r--r-- | fs/nfs/namespace.c | 112 | ||||
| -rw-r--r-- | fs/nfs/nfs2xdr.c | 2 | ||||
| -rw-r--r-- | fs/nfs/nfs3proc.c | 5 | ||||
| -rw-r--r-- | fs/nfs/nfs3xdr.c | 3 | ||||
| -rw-r--r-- | fs/nfs/nfs4namespace.c | 201 | ||||
| -rw-r--r-- | fs/nfs/nfs4proc.c | 2 | ||||
| -rw-r--r-- | fs/nfs/pagelist.c | 4 | ||||
| -rw-r--r-- | fs/nfs/proc.c | 5 | ||||
| -rw-r--r-- | fs/nfs/read.c | 4 | ||||
| -rw-r--r-- | fs/nfs/super.c | 1468 | ||||
| -rw-r--r-- | fs/nfs/write.c | 4 |
16 files changed, 1993 insertions, 1802 deletions
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile index d9d494cee388..0b572a0c1967 100644 --- a/fs/nfs/Makefile +++ b/fs/nfs/Makefile @@ -4,7 +4,7 @@ obj-$(CONFIG_NFS_FS) += nfs.o -nfs-y := dir.o file.o inode.o nfs2xdr.o pagelist.o \ +nfs-y := dir.o file.o inode.o super.o nfs2xdr.o pagelist.o \ proc.o read.o symlink.o unlink.o write.o \ namespace.o nfs-$(CONFIG_ROOT_NFS) += nfsroot.o mount_clnt.o @@ -12,7 +12,8 @@ nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3xdr.o nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \ delegation.o idmap.o \ - callback.o callback_xdr.o callback_proc.o + callback.o callback_xdr.o callback_proc.o \ + nfs4namespace.o nfs-$(CONFIG_NFS_DIRECTIO) += direct.o nfs-$(CONFIG_SYSCTL) += sysctl.o nfs-objs := $(nfs-y) diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index 90c95adc8c1b..d53f8c6a9ecb 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -182,8 +182,6 @@ static int nfs_callback_authenticate(struct svc_rqst *rqstp) /* * Define NFS4 callback program */ -extern struct svc_version nfs4_callback_version1; - static struct svc_version *nfs4_callback_version[] = { [1] = &nfs4_callback_version1, }; diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 3c72b0c07283..402005c35ab3 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -892,7 +892,7 @@ out: * nfs_init_directcache - create a slab cache for nfs_direct_req structures * */ -int nfs_init_directcache(void) +int __init nfs_init_directcache(void) { nfs_direct_cachep = kmem_cache_create("nfs_direct_cache", sizeof(struct nfs_direct_req), @@ -906,10 +906,10 @@ int nfs_init_directcache(void) } /** - * nfs_init_directcache - destroy the slab cache for nfs_direct_req structures + * nfs_destroy_directcache - destroy the slab cache for nfs_direct_req structures * */ -void nfs_destroy_directcache(void) +void __exit nfs_destroy_directcache(void) { if (kmem_cache_destroy(nfs_direct_cachep)) printk(KERN_INFO "nfs_direct_cache: not all structures were freed\n"); diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 7ab2b38a990c..24a7139d3449 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -46,87 +46,17 @@ #include "callback.h" #include "delegation.h" #include "iostat.h" +#include "internal.h" #define NFSDBG_FACILITY NFSDBG_VFS #define NFS_PARANOIA 1 -/* Maximum number of readahead requests - * FIXME: this should really be a sysctl so that users may tune it to suit - * their needs. People that do NFS over a slow network, might for - * instance want to reduce it to something closer to 1 for improved - * interactive response. - */ -#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) - static void nfs_invalidate_inode(struct inode *); static int nfs_update_inode(struct inode *, struct nfs_fattr *); -static struct inode *nfs_alloc_inode(struct super_block *sb); -static void nfs_destroy_inode(struct inode *); -static int nfs_write_inode(struct inode *,int); -static void nfs_clear_inode(struct inode *); -static void nfs_umount_begin(struct vfsmount *, int); -static int nfs_statfs(struct super_block *, struct kstatfs *); -static int nfs_show_options(struct seq_file *, struct vfsmount *); -static int nfs_show_stats(struct seq_file *, struct vfsmount *); static void nfs_zap_acl_cache(struct inode *); -static struct rpc_program nfs_program; - -static struct super_operations nfs_sops = { - .alloc_inode = nfs_alloc_inode, - .destroy_inode = nfs_destroy_inode, - .write_inode = nfs_write_inode, - .statfs = nfs_statfs, - .clear_inode = nfs_clear_inode, - .umount_begin = nfs_umount_begin, - .show_options = nfs_show_options, - .show_stats = nfs_show_stats, -}; - -/* - * RPC cruft for NFS - */ -static struct rpc_stat nfs_rpcstat = { - .program = &nfs_program -}; -static struct rpc_version * nfs_version[] = { - NULL, - NULL, - &nfs_version2, -#if defined(CONFIG_NFS_V3) - &nfs_version3, -#elif defined(CONFIG_NFS_V4) - NULL, -#endif -#if defined(CONFIG_NFS_V4) - &nfs_version4, -#endif -}; - -static struct rpc_program nfs_program = { - .name = "nfs", - .number = NFS_PROGRAM, - .nrvers = ARRAY_SIZE(nfs_version), - .version = nfs_version, - .stats = &nfs_rpcstat, - .pipe_dir_name = "/nfs", -}; - -#ifdef CONFIG_NFS_V3_ACL -static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; -static struct rpc_version * nfsacl_version[] = { - [3] = &nfsacl_version3, -}; - -struct rpc_program nfsacl_program = { - .name = "nfsacl", - .number = NFS_ACL_PROGRAM, - .nrvers = ARRAY_SIZE(nfsacl_version), - .version = nfsacl_version, - .stats = &nfsacl_rpcstat, -}; -#endif /* CONFIG_NFS_V3_ACL */ +static kmem_cache_t * nfs_inode_cachep; static inline unsigned long nfs_fattr_to_ino_t(struct nfs_fattr *fattr) @@ -134,8 +64,7 @@ nfs_fattr_to_ino_t(struct nfs_fattr *fattr) return nfs_fileid_to_ino_t(fattr->fileid); } -static int -nfs_write_inode(struct inode *inode, int sync) +int nfs_write_inode(struct inode *inode, int sync) { int flags = sync ? FLUSH_SYNC : 0; int ret; @@ -146,8 +75,7 @@ nfs_write_inode(struct inode *inode, int sync) return 0; } -static void -nfs_clear_inode(struct inode *inode) +void nfs_clear_inode(struct inode *inode) { struct nfs_inode *nfsi = NFS_I(inode); struct rpc_cred *cred; @@ -164,566 +92,6 @@ nfs_clear_inode(struct inode *inode) BUG_ON(atomic_read(&nfsi->data_updates) != 0); } -static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) -{ - struct nfs_server *server; - struct rpc_clnt *rpc; - - shrink_submounts(vfsmnt, &nfs_automount_list); - if (!(flags & MNT_FORCE)) - return; - /* -EIO all pending I/O */ - server = NFS_SB(vfsmnt->mnt_sb); - rpc = server->client; - if (!IS_ERR(rpc)) - rpc_killall_tasks(rpc); - rpc = server->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); -} - -static inline void -nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) -{ - sb->s_maxbytes = (loff_t)maxfilesize; - if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) - sb->s_maxbytes = MAX_LFS_FILESIZE; -} - -/* - * 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); - 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); - } - - server->fsid = fsinfo->fattr->fsid; - return nfs_fhget(sb, rootfh, fsinfo->fattr); -} - -/* - * 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; - - server->io_stats = nfs_alloc_iostats(); - if (server->io_stats == NULL) - return -ENOMEM; - - 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; - - /* mount time stamp, in seconds */ - server->mount_time = jiffies; - - /* 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; - - nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); - - server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0; - server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 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); - - server->retrans_timeo = timeparms.to_initval; - server->retrans_count = timeparms.to_retries; - - /* 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; - - 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 void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) -{ - static struct proc_nfs_info { - int flag; - char *str; - char *nostr; - } nfs_info[] = { - { NFS_MOUNT_SOFT, ",soft", ",hard" }, - { NFS_MOUNT_INTR, ",intr", "" }, - { NFS_MOUNT_NOCTO, ",nocto", "" }, - { NFS_MOUNT_NOAC, ",noac", "" }, - { NFS_MOUNT_NONLM, ",nolock", "" }, - { NFS_MOUNT_NOACL, ",noacl", "" }, - { 0, NULL, NULL } - }; - struct proc_nfs_info *nfs_infop; - char buf[12]; - char *proto; - - seq_printf(m, ",vers=%d", nfss->rpc_ops->version); - seq_printf(m, ",rsize=%d", nfss->rsize); - seq_printf(m, ",wsize=%d", nfss->wsize); - if (nfss->acregmin != 3*HZ || showdefaults) - seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); - if (nfss->acregmax != 60*HZ || showdefaults) - seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); - if (nfss->acdirmin != 30*HZ || showdefaults) - seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); - if (nfss->acdirmax != 60*HZ || showdefaults) - 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_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ); - seq_printf(m, ",retrans=%u", nfss->retrans_count); -} - -static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) -{ - struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); - - nfs_show_mount_options(m, nfss, 0); - - seq_puts(m, ",addr="); - seq_escape(m, nfss->hostname, " \t\n\\"); - - return 0; -} - -static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) -{ - int i, cpu; - struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); - struct rpc_auth *auth = nfss->client->cl_auth; - struct nfs_iostats totals = { }; - - seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); - - /* - * Display all mount option settings - */ - seq_printf(m, "\n\topts:\t"); - seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); - seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); - seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); - seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); - nfs_show_mount_options(m, nfss, 1); - - seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); - - seq_printf(m, "\n\tcaps:\t"); - seq_printf(m, "caps=0x%x", nfss->caps); - seq_printf(m, ",wtmult=%d", nfss->wtmult); - seq_printf(m, ",dtsize=%d", nfss->dtsize); - seq_printf(m, ",bsize=%d", nfss->bsize); - seq_printf(m, ",namelen=%d", nfss->namelen); - -#ifdef CONFIG_NFS_V4 - if (nfss->rpc_ops->version == 4) { - seq_printf(m, "\n\tnfsv4:\t"); - seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); - seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); - seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); - } -#endif - - /* - * Display security flavor in effect for this mount - */ - seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); - if (auth->au_flavor) - seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); - - /* - * Display superblock I/O counters - */ - for_each_possible_cpu(cpu) { - struct nfs_iostats *stats; - - preempt_disable(); - stats = per_cpu_ptr(nfss->io_stats, cpu); - - for (i = 0; i < __NFSIOS_COUNTSMAX; i++) - totals.events[i] += stats->events[i]; - for (i = 0; i < __NFSIOS_BYTESMAX; i++) - totals.bytes[i] += stats->bytes[i]; - - preempt_enable(); - } - - seq_printf(m, "\n\tevents:\t"); - for (i = 0; i < __NFSIOS_COUNTSMAX; i++) - seq_printf(m, "%lu ", totals.events[i]); - seq_printf(m, "\n\tbytes:\t"); - for (i = 0; i < __NFSIOS_BYTESMAX; i++) - seq_printf(m, "%Lu ", totals.bytes[i]); - seq_printf(m, "\n"); - - rpc_print_iostats(m, nfss->client); - - return 0; -} - /** * nfs_sync_mapping - helper to flush all mmapped dirty data to disk */ @@ -1663,371 +1031,15 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) goto out_err; } -/* - * File system information - */ - -/* - * nfs_path - reconstruct the path given an arbitrary dentry - * @base - arbitrary string to prepend to the path - * @dentry - pointer to dentry - * @buffer - result buffer - * @buflen - length of buffer - * - * Helper function for constructing the path from the - * root dentry to an arbitrary hashed dentry. - * - * This is mainly for use in figuring out the path on the - * server side when automounting on top of an existing partition. - */ -static char *nfs_path(const char *base, const struct dentry *dentry, - char *buffer, ssize_t buflen) -{ - char *end = buffer+buflen; - int namelen; - - *--end = '\0'; - buflen--; - spin_lock(&dcache_lock); - while (!IS_ROOT(dentry)) { - namelen = dentry->d_name.len; - buflen -= namelen + 1; - if (buflen < 0) - goto Elong; - end -= namelen; - memcpy(end, dentry->d_name.name, namelen); - *--end = '/'; - dentry = dentry->d_parent; - } - spin_unlock(&dcache_lock); - namelen = strlen(base); - /* Strip off excess slashes in base string */ - while (namelen > 0 && base[namelen - 1] == '/') - namelen--; - buflen -= namelen; - if (buflen < 0) - goto Elong; - end -= namelen; - memcpy(end, base, namelen); - return end; -Elong: - return ERR_PTR(-ENAMETOOLONG); -} - -struct nfs_clone_mount { - const struct super_block *sb; - const struct dentry *dentry; - struct nfs_fh *fh; - struct nfs_fattr *fattr; - char *hostname; - char *mnt_path; - struct sockaddr_in *addr; - rpc_authflavor_t authflavor; -}; - -static struct super_block *nfs_clone_generic_sb(struct nfs_clone_mount *data, - struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *), - struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *)) -{ - struct nfs_server *server; - struct nfs_server *parent = NFS_SB(data->sb); - struct super_block *sb = ERR_PTR(-EINVAL); - void *err = ERR_PTR(-ENOMEM); - char *hostname; - int len; - - server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); - if (server == NULL) - goto out_err; - memcpy(server, parent, sizeof(*server)); - hostname = (data->hostname != NULL) ? data->hostname : parent->hostname; - len = strlen(hostname) + 1; - server->hostname = kmalloc(len, GFP_KERNEL); - if (server->hostname == NULL) - goto free_server; - memcpy(server->hostname, hostname, len); - if (rpciod_up() != 0) - goto free_hostname; - - sb = fill_sb(server, data); - if (IS_ERR((err = sb)) || sb->s_root) - goto kill_rpciod; - - server = fill_server(sb, data); - if (IS_ERR((err = server))) - goto out_deactivate; - return sb; -out_deactivate: - up_write(&sb->s_umount); - deactivate_super(sb); - return (struct super_block *)err; -kill_rpciod: - rpciod_down(); -free_hostname: - kfree(server->hostname); -free_server: - kfree(server); -out_err: - return (struct super_block *)err; -} - -static int nfs_set_super(struct super_block *s, void *data) -{ - s->s_fs_info = data; - return set_anon_super(s, data); -} - -static int nfs_compare_super(struct super_block *sb, void *data) -{ - struct nfs_server *server = data; - struct nfs_server *old = NFS_SB(sb); - - if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr) - return 0; - if (old->addr.sin_port != server->addr.sin_port) - return 0; - return !nfs_compare_fh(&old->fh, &server->fh); -} - -static struct super_block *nfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data) -{ - int error; - struct nfs_server *server = NULL; - struct super_block *s; - struct nfs_fh *root; - struct nfs_mount_data *data = raw_data; - - s = ERR_PTR(-EINVAL); - if (data == NULL) { - dprintk("%s: missing data argument\n", __FUNCTION__); - goto out_err; - } - if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) { - dprintk("%s: bad mount version\n", __FUNCTION__); - goto out_err; - } - switch (data->version) { - case 1: - data->namlen = 0; - case 2: - data->bsize = 0; - case 3: - if (data->flags & NFS_MOUNT_VER3) { - dprintk("%s: mount structure version %d does not support NFSv3\n", - __FUNCTION__, - data->version); - goto out_err; - } - data->root.size = NFS2_FHSIZE; - memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); - case 4: - if (data->flags & NFS_MOUNT_SECFLAVOUR) { - dprintk("%s: mount structure version %d does not support strong security\n", - __FUNCTION__, - data->version); - goto out_err; - } - case 5: - memset(data->context, 0, sizeof(data->context)); - } -#ifndef CONFIG_NFS_V3 - /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */ - s = ERR_PTR(-EPROTONOSUPPORT); - if (data->flags & NFS_MOUNT_VER3) { - dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__); - goto out_err; - } -#endif /* CONFIG_NFS_V3 */ - - s = ERR_PTR(-ENOMEM); - server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); - if (!server) - goto out_err; - /* Zero out the NFS state stuff */ - init_nfsv4_state(server); - server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); - - root = &server->fh; - if (data->flags & NFS_MOUNT_VER3) - root->size = data->root.size; - else - root->size = NFS2_FHSIZE; - s = ERR_PTR(-EINVAL); - if (root->size > sizeof(root->data)) { - dprintk("%s: invalid root filehandle\n", __FUNCTION__); - goto out_err; - } - memcpy(root->data, data->root.data, root->size); - - /* We now require that the mount process passes the remote address */ - memcpy(&server->addr, &data->addr, sizeof(server->addr)); - if (server->addr.sin_addr.s_addr == INADDR_ANY) { - dprintk("%s: mount program didn't pass remote address!\n", - __FUNCTION__); - goto out_err; - } - - /* Fire up rpciod if not yet running */ - s = ERR_PTR(rpciod_up()); - if (IS_ERR(s)) { - dprintk("%s: couldn't start rpciod! Error = %ld\n", - __FUNCTION__, PTR_ERR(s)); - goto out_err; - } - - s = sget(fs_type, nfs_compare_super, nfs_set_super, server); - if (IS_ERR(s) || s->s_root) - goto out_rpciod_down; - - s->s_flags = flags; - - error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0); - if (error) { - up_write(&s->s_umount); - deactivate_super(s); - return ERR_PTR(error); - } - s->s_flags |= MS_ACTIVE; - return s; -out_rpciod_down: - rpciod_down(); -out_err: - kfree(server); - return s; -} - -static void nfs_kill_super(struct super_block *s) -{ - struct nfs_server *server = NFS_SB(s); - - kill_anon_super(s); - - if (!IS_ERR(server->client)) - rpc_shutdown_client(server->client); - if (!IS_ERR(server->client_sys)) - rpc_shutdown_client(server->client_sys); - if (!IS_ERR(server->client_acl)) - rpc_shutdown_client(server->client_acl); - - if (!(server->flags & NFS_MOUNT_NONLM)) - lockd_down(); /* release rpc.lockd */ - - rpciod_down(); /* release rpciod */ - - nfs_free_iostats(server->io_stats); - kfree(server->hostname); - kfree(server); - nfs_release_automount_timer(); -} - -static struct file_system_type nfs_fs_type = { - .owner = THIS_MODULE, - .name = "nfs", - .get_sb = nfs_get_sb, - .kill_sb = nfs_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, -}; - -static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data) -{ - struct super_block *sb; - - server->fsid = data->fattr->fsid; - nfs_copy_fh(&server->fh, data->fh); - sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server); - if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM)) - lockd_up(); - return sb; -} - -static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data) -{ - struct nfs_server *server = NFS_SB(sb); - struct nfs_server *parent = NFS_SB(data->sb); - struct inode *root_inode; - struct nfs_fsinfo fsinfo; - void *err = ERR_PTR(-ENOMEM); - - sb->s_op = data->sb->s_op; - sb->s_blocksize = data->sb->s_blocksize; - sb->s_blocksize_bits = data->sb->s_blocksize_bits; - sb->s_maxbytes = data->sb->s_maxbytes; - - server->client_sys = server->client_acl = ERR_PTR(-EINVAL); - server->io_stats = nfs_alloc_iostats(); - if (server->io_stats == NULL) - goto out; - - server->client = rpc_clone_client(parent->client); - if (IS_ERR((err = server->client))) - goto out; - - if (!IS_ERR(parent->client_sys)) { - server->client_sys = rpc_clone_client(parent->client_sys); - if (IS_ERR((err = server->client_sys))) - goto out; - } - if (!IS_ERR(parent->client_acl)) { - server->client_acl = rpc_clone_client(parent->client_acl); - if (IS_ERR((err = server->client_acl))) - goto out; - } - root_inode = nfs_fhget(sb, data->fh, data->fattr); - if (!root_inode) - goto out; - sb->s_root = d_alloc_root(root_inode); - if (!sb->s_root) - goto out_put_root; - fsinfo.fattr = data->fattr; - if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0) - nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); - sb->s_root->d_op = server->rpc_ops->dentry_ops; - sb->s_flags |= MS_ACTIVE; - return server; -out_put_root: - iput(root_inode); -out: - return err; -} - -static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data) -{ - struct nfs_clone_mount *data = raw_data; - return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server); -} - -static struct file_system_type clone_nfs_fs_type = { - .owner = THIS_MODULE, - .name = "nfs", - .get_sb = nfs_clone_nfs_sb, - .kill_sb = nfs_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, -}; #ifdef CONFIG_NFS_V4 -static void nfs4_clear_inode(struct inode *); - - -static struct super_operations nfs4_sops = { - .alloc_inode = nfs_alloc_inode, - .destroy_inode = nfs_destroy_inode, - .write_inode = nfs_write_inode, - .statfs = nfs_statfs, - .clear_inode = nfs4_clear_inode, - .umount_begin = nfs_umount_begin, - .show_options = nfs_show_options, - .show_stats = nfs_show_stats, -}; - /* * Clean out any remaining NFSv4 state that might be left over due * to open() calls that passed nfs_atomic_lookup, but failed to call * nfs_open(). */ -static void nfs4_clear_inode(struct inode *inode) +void nfs4_clear_inode(struct inode *inode) { struct nfs_inode *nfsi = NFS_I(inode); @@ -2051,774 +1063,9 @@ static void nfs4_clear_inode(struct inode *inode) nfs4_close_state(state, state->state); } } - - -static struct rpc_clnt *nfs4_create_client(struct nfs_server *server, - struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor) -{ - struct nfs4_client *clp; - struct rpc_xprt *xprt = NULL; - struct rpc_clnt *clnt = NULL; - int err = -EIO; - - clp = nfs4_get_client(&server->addr.sin_addr); - if (!clp) { - dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__); - return ERR_PTR(err); - } - - /* Now create transport and client */ - down_write(&clp->cl_sem); - if (IS_ERR(clp->cl_rpcclient)) { - xprt = xprt_create_proto(proto, &server->addr, timeparms); - if (IS_ERR(xprt)) { - up_write(&clp->cl_sem); - err = PTR_ERR(xprt); - dprintk("%s: cannot create RPC transport. Error = %d\n", - __FUNCTION__, err); - goto out_fail; - } - /* Bind to a reserved port! */ - xprt->resvport = 1; - clnt = rpc_create_client(xprt, server->hostname, &nfs_program, - server->rpc_ops->version, flavor); - if (IS_ERR(clnt)) { - up_write(&clp->cl_sem); - err = PTR_ERR(clnt); - dprintk("%s: cannot create RPC client. Error = %d\n", - __FUNCTION__, err); - goto out_fail; - } - clnt->cl_intr = 1; - clnt->cl_softrtry = 1; - clp->cl_rpcclient = clnt; - memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr)); - nfs_idmap_new(clp); - } - list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); - clnt = rpc_clone_client(clp->cl_rpcclient); - if (!IS_ERR(clnt)) - server->nfs4_state = clp; - up_write(&clp->cl_sem); - clp = NULL; - - if (IS_ERR(clnt)) { - dprintk("%s: cannot create RPC client. Error = %d\n", - __FUNCTION__, err); - return clnt; - } - - if (server->nfs4_state->cl_idmap == NULL) { - dprintk("%s: failed to create idmapper.\n", __FUNCTION__); - return ERR_PTR(-ENOMEM); - } - - if (clnt->cl_auth->au_flavor != flavor) { - struct rpc_auth *auth; - - auth = rpcauth_create(flavor, clnt); - if (IS_ERR(auth)) { - dprintk("%s: couldn't create credcache!\n", __FUNCTION__); - return (struct rpc_clnt *)auth; - } - } - return clnt; - - out_fail: - if (clp) - nfs4_put_client(clp); - return ERR_PTR(err); -} - -static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent) -{ - struct nfs_server *server; - struct rpc_timeout timeparms; - rpc_authflavor_t authflavour; - int err = -EIO; - - sb->s_blocksize_bits = 0; - sb->s_blocksize = 0; - server = NFS_SB(sb); - if (data->rsize != 0) - server->rsize = nfs_block_size(data->rsize, NULL); - if (data->wsize != 0) - server->wsize = nfs_block_size(data->wsize, NULL); - server->flags = data->flags & NFS_MOUNT_FLAGMASK; - server->caps = NFS_CAP_ATOMIC_OPEN; - - server->acregmin = data->acregmin*HZ; - server->acregmax = data->acregmax*HZ; - server->acdirmin = data->acdirmin*HZ; - server->acdirmax = data->acdirmax*HZ; - - server->rpc_ops = &nfs_v4_clientops; - - nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans); - - server->retrans_timeo = timeparms.to_initval; - server->retrans_count = timeparms.to_retries; - - /* Now create transport and client */ - authflavour = RPC_AUTH_UNIX; - if (data->auth_flavourlen != 0) { - if (data->auth_flavourlen != 1) { - dprintk("%s: Invalid number of RPC auth flavours %d.\n", - __FUNCTION__, data->auth_flavourlen); - err = -EINVAL; - goto out_fail; - } - if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) { - err = -EFAULT; - goto out_fail; - } - } - - server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour); - if (IS_ERR(server->client)) { - err = PTR_ERR(server->client); - dprintk("%s: cannot create RPC client. Error = %d\n", - __FUNCTION__, err); - goto out_fail; - } - - sb->s_time_gran = 1; - - sb->s_op = &nfs4_sops; - err = nfs_sb_init(sb, authflavour); - - out_fail: - return err; -} - -static int nfs4_compare_super(struct super_block *sb, void *data) -{ - struct nfs_server *server = data; - struct nfs_server *old = NFS_SB(sb); - - if (strcmp(server->hostname, old->hostname) != 0) - return 0; - if (strcmp(server->mnt_path, old->mnt_path) != 0) - return 0; - return 1; -} - -static void * -nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen) -{ - void *p = NULL; - - if (!src->len) - return ERR_PTR(-EINVAL); - if (src->len < maxlen) - maxlen = src->len; - if (dst == NULL) { - p = dst = kmalloc(maxlen + 1, GFP_KERNEL); - if (p == NULL) - return ERR_PTR(-ENOMEM); - } - if (copy_from_user(dst, src->data, maxlen)) { - kfree(p); - return ERR_PTR(-EFAULT); - } - dst[maxlen] = '\0'; - return dst; -} - -static struct super_block *nfs4_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data) -{ - int error; - struct nfs_server *server; - struct super_block *s; - struct nfs4_mount_data *data = raw_data; - void *p; - - if (data == NULL) { - dprintk("%s: missing data argument\n", __FUNCTION__); - return ERR_PTR(-EINVAL); - } - if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) { - dprintk("%s: bad mount version\n", __FUNCTION__); - return ERR_PTR(-EINVAL); - } - - server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); - if (!server) - return ERR_PTR(-ENOMEM); - /* Zero out the NFS state stuff */ - init_nfsv4_state(server); - server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); - - p = nfs_copy_user_string(NULL, &data->hostname, 256); - if (IS_ERR(p)) - goto out_err; - server->hostname = p; - - p = nfs_copy_user_string(NULL, &data->mnt_path, 1024); - if (IS_ERR(p)) - goto out_err; - server->mnt_path = p; - - p = nfs_copy_user_string(server->ip_addr, &data->client_addr, - sizeof(server->ip_addr) - 1); - if (IS_ERR(p)) - goto out_err; - - /* We now require that the mount process passes the remote address */ - if (data->host_addrlen != sizeof(server->addr)) { - s = ERR_PTR(-EINVAL); - goto out_free; - } - if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) { - s = ERR_PTR(-EFAULT); - goto out_free; - } - if (server->addr.sin_family != AF_INET || - server->addr.sin_addr.s_addr == INADDR_ANY) { - dprintk("%s: mount program didn't pass remote IP address!\n", - __FUNCTION__); - s = ERR_PTR(-EINVAL); - goto out_free; - } - - /* Fire up rpciod if not yet running */ - s = ERR_PTR(rpciod_up()); - if (IS_ERR(s)) { - dprintk("%s: couldn't start rpciod! Error = %ld\n", - __FUNCTION__, PTR_ERR(s)); - goto out_free; - } - - s = sget(fs_type, nfs4_compare_super, nfs_set_super, server); - - if (IS_ERR(s) || s->s_root) - goto out_free; - - s->s_flags = flags; - - error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0); - if (error) { - up_write(&s->s_umount); - deactivate_super(s); - return ERR_PTR(error); - } - s->s_flags |= MS_ACTIVE; - return s; -out_err: - s = (struct super_block *)p; -out_free: - kfree(server->mnt_path); - kfree(server->hostname); - kfree(server); - return s; -} - -static void nfs4_kill_super(struct super_block *sb) -{ - struct nfs_server *server = NFS_SB(sb); - - nfs_return_all_delegations(sb); - kill_anon_super(sb); - - nfs4_renewd_prepare_shutdown(server); - - if (server->client != NULL && !IS_ERR(server->client)) - rpc_shutdown_client(server->client); - - destroy_nfsv4_state(server); - - rpciod_down(); - - nfs_free_iostats(server->io_stats); - kfree(server->hostname); - kfree(server); - nfs_release_automount_timer(); -} - -static struct file_system_type nfs4_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .get_sb = nfs4_get_sb, - .kill_sb = nfs4_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, -}; - -static const int nfs_set_port_min = 0; -static const int nfs_set_port_max = 65535; -static int param_set_port(const char *val, struct kernel_param *kp) -{ - char *endp; - int num = simple_strtol(val, &endp, 0); - if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max) - return -EINVAL; - *((int *)kp->arg) = num; - return 0; -} - -module_param_call(callback_tcpport, param_set_port, param_get_int, - &nfs_callback_set_tcpport, 0644); - -static int param_set_idmap_timeout(const char *val, struct kernel_param *kp) -{ - char *endp; - int num = simple_strtol(val, &endp, 0); - int jif = num * HZ; - if (endp == val || *endp || num < 0 || jif < num) - return -EINVAL; - *((int *)kp->arg) = jif; - return 0; -} - -module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int, - &nfs_idmap_cache_timeout, 0644); - -/* Constructs the SERVER-side path */ -static inline char *nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen) -{ - return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen); -} - -static inline char *nfs4_dup_path(const struct dentry *dentry) -{ - char *page = (char *) __get_free_page(GFP_USER); - char *path; - - path = nfs4_path(dentry, page, PAGE_SIZE); - if (!IS_ERR(path)) { - int len = PAGE_SIZE + page - path; - char *tmp = path; - - path = kmalloc(len, GFP_KERNEL); - if (path) - memcpy(path, tmp, len); - else - path = ERR_PTR(-ENOMEM); - } - free_page((unsigned long)page); - return path; -} - -static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data) -{ - const struct dentry *dentry = data->dentry; - struct nfs4_client *clp = server->nfs4_state; - struct super_block *sb; - - server->fsid = data->fattr->fsid; - nfs_copy_fh(&server->fh, data->fh); - server->mnt_path = nfs4_dup_path(dentry); - if (IS_ERR(server->mnt_path)) { - sb = (struct super_block *)server->mnt_path; - goto err; - } - sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server); - if (IS_ERR(sb) || sb->s_root) - goto free_path; - nfs4_server_capabilities(server, &server->fh); - - down_write(&clp->cl_sem); - atomic_inc(&clp->cl_count); - list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); - up_write(&clp->cl_sem); - return sb; -free_path: - kfree(server->mnt_path); -err: - server->mnt_path = NULL; - return sb; -} - -static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data) -{ - struct nfs_clone_mount *data = raw_data; - return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server); -} - -static struct file_system_type clone_nfs4_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .get_sb = nfs_clone_nfs4_sb, - .kill_sb = nfs4_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, -}; - -static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname, struct nfs_clone_mount *mountdata) -{ - struct vfsmount *mnt = NULL; - switch (server->rpc_ops->version) { - case 2: - case 3: - mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata); - break; - case 4: - mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, mountdata); - } - return mnt; -} - -#define nfs4_init_once(nfsi) \ - do { \ - INIT_LIST_HEAD(&(nfsi)->open_states); \ - nfsi->delegation = NULL; \ - nfsi->delegation_state = 0; \ - init_rwsem(&nfsi->rwsem); \ - } while(0) - -static inline int register_nfs4fs(void) -{ - int ret; - - ret = nfs_register_sysctl(); - if (ret != 0) - return ret; - ret = register_filesystem(&nfs4_fs_type); - if (ret != 0) - nfs_unregister_sysctl(); - return ret; -} - -static inline void unregister_nfs4fs(void) -{ - unregister_filesystem(&nfs4_fs_type); - nfs_unregister_sysctl(); -} -#else -#define nfs4_fill_sb(a,b) ERR_PTR(-EINVAL) -#define nfs4_fill_super(a,b) ERR_PTR(-EINVAL) -#define nfs4_init_once(nfsi) \ - do { } while (0) -#define register_nfs4fs() (0) -#define unregister_nfs4fs() -static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname, struct nfs_clone_mount *mountdata) -{ - return vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata); -} #endif -static inline char *nfs_devname(const struct vfsmount *mnt_parent, - const struct dentry *dentry, - char *buffer, ssize_t buflen) -{ - return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen); -} - -/** - * nfs_do_submount - set up mountpoint when crossing a filesystem boundary - * @mnt_parent - mountpoint of parent directory - * @dentry - parent directory - * @fh - filehandle for new root dentry - * @fattr - attributes for new root inode - * - */ -struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent, - const struct dentry *dentry, struct nfs_fh *fh, - struct nfs_fattr *fattr) -{ - struct nfs_clone_mount mountdata = { - .sb = mnt_parent->mnt_sb, - .dentry = dentry, - .fh = fh, - .fattr = fattr, - }; - struct vfsmount *mnt = ERR_PTR(-ENOMEM); - char *page = (char *) __get_free_page(GFP_USER); - char *devname; - - dprintk("%s: submounting on %s/%s\n", __FUNCTION__, - dentry->d_parent->d_name.name, - dentry->d_name.name); - if (page == NULL) - goto out; - devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE); - mnt = (struct vfsmount *)devname; - if (IS_ERR(devname)) - goto free_page; - mnt = nfs_do_clone_mount(NFS_SB(mnt_parent->mnt_sb), devname, &mountdata); -free_page: - free_page((unsigned long)page); -out: - dprintk("%s: done\n", __FUNCTION__); - return mnt; -} - -#ifdef CONFIG_NFS_V4 -/* Check if fs_root is valid */ -static inline char *nfs4_pathname_string(struct nfs4_pathname *pathname, char *buffer, ssize_t buflen) -{ - char *end = buffer + buflen; - int n; - - *--end = '\0'; - buflen--; - - n = pathname->ncomponents; - while (--n >= 0) { - struct nfs4_string *component = &pathname->components[n]; - buflen -= component->len + 1; - if (buflen < 0) - goto Elong; - end -= component->len; - memcpy(end, component->data, component->len); - *--end = '/'; - } - return end; -Elong: - return ERR_PTR(-ENAMETOOLONG); -} - -/* Check if the string represents a "valid" IPv4 address */ -static inline int valid_ipaddr4(const char *buf) -{ - int rc, count, in[4]; - - rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]); - if (rc != 4) - return -EINVAL; - for (count = 0; count < 4; count++) { - if (in[count] > 255) - return -EINVAL; - } - return 0; -} - -static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data) -{ - struct super_block *sb = ERR_PTR(-ENOMEM); - int len; - - len = strlen(data->mnt_path) + 1; - server->mnt_path = kmalloc(len, GFP_KERNEL); - if (server->mnt_path == NULL) - goto err; - memcpy(server->mnt_path, data->mnt_path, len); - memcpy(&server->addr, data->addr, sizeof(struct sockaddr_in)); - - sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server); - if (IS_ERR(sb) || sb->s_root) - goto free_path; - return sb; -free_path: - kfree(server->mnt_path); -err: - server->mnt_path = NULL; - return sb; -} - -static struct nfs_server *nfs4_referral_server(struct super_block *sb, struct nfs_clone_mount *data) -{ - struct nfs_server *server = NFS_SB(sb); - struct rpc_timeout timeparms; - int proto, timeo, retrans; - void *err; - - proto = IPPROTO_TCP; - /* Since we are following a referral and there may be alternatives, - set the timeouts and retries to low values */ - timeo = 2; - retrans = 1; - nfs_init_timeout_values(&timeparms, proto, timeo, retrans); - - server->client = nfs4_create_client(server, &timeparms, proto, data->authflavor); - if (IS_ERR((err = server->client))) - goto out_err; - - sb->s_time_gran = 1; - sb->s_op = &nfs4_sops; - err = ERR_PTR(nfs_sb_init(sb, data->authflavor)); - if (!IS_ERR(err)) - return server; -out_err: - return (struct nfs_server *)err; -} - -static struct super_block *nfs_referral_nfs4_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data) -{ - struct nfs_clone_mount *data = raw_data; - return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server); -} - -static struct file_system_type nfs_referral_nfs4_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .get_sb = nfs_referral_nfs4_sb, - .kill_sb = nfs4_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, -}; - -/** - * nfs_follow_referral - set up mountpoint when hitting a referral on moved error - * @mnt_parent - mountpoint of parent directory - * @dentry - parent directory - * @fspath - fs path returned in fs_locations - * @mntpath - mount path to new server - * @hostname - hostname of new server - * @addr - host addr of new server - * - */ -struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent, - const struct dentry *dentry, struct nfs4_fs_locations *locations) -{ - struct vfsmount *mnt = ERR_PTR(-ENOENT); - struct nfs_clone_mount mountdata = { - .sb = mnt_parent->mnt_sb, - .dentry = dentry, - .authflavor = NFS_SB(mnt_parent->mnt_sb)->client->cl_auth->au_flavor, - }; - char *page, *page2; - char *path, *fs_path; - char *devname; - int loc, s; - - if (locations == NULL || locations->nlocations <= 0) - goto out; - - dprintk("%s: referral at %s/%s\n", __FUNCTION__, - dentry->d_parent->d_name.name, dentry->d_name.name); - - /* Ensure fs path is a prefix of current dentry path */ - page = (char *) __get_free_page(GFP_USER); - if (page == NULL) - goto out; - page2 = (char *) __get_free_page(GFP_USER); - if (page2 == NULL) - goto out; - - path = nfs4_path(dentry, page, PAGE_SIZE); - if (IS_ERR(path)) - goto out_free; - - fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE); - if (IS_ERR(fs_path)) - goto out_free; - - if (strncmp(path, fs_path, strlen(fs_path)) != 0) { - dprintk("%s: path %s does not begin with fsroot %s\n", __FUNCTION__, path, fs_path); - goto out_free; - } - - devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE); - if (IS_ERR(devname)) { - mnt = (struct vfsmount *)devname; - goto out_free; - } - - loc = 0; - while (loc < locations->nlocations && IS_ERR(mnt)) { - struct nfs4_fs_location *location = &locations->locations[loc]; - char *mnt_path; - - if (location == NULL || location->nservers <= 0 || - location->rootpath.ncomponents == 0) { - loc++; - continue; - } - - mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE); - if (IS_ERR(mnt_path)) { - loc++; - continue; - } - mountdata.mnt_path = mnt_path; - - s = 0; - while (s < location->nservers) { - struct sockaddr_in addr = {}; - - if (location->servers[s].len <= 0 || - valid_ipaddr4(location->servers[s].data) < 0) { - s++; - continue; - } - - mountdata.hostname = location->servers[s].data; - addr.sin_addr.s_addr = in_aton(mountdata.hostname); - addr.sin_family = AF_INET; - addr.sin_port = htons(NFS_PORT); - mountdata.addr = &addr; - - mnt = vfs_kern_mount(&nfs_referral_nfs4_fs_type, 0, devname, &mountdata); - if (!IS_ERR(mnt)) { - break; - } - s++; - } - loc++; - } - -out_free: - free_page((unsigned long)page); - free_page((unsigned long)page2); -out: - dprintk("%s: done\n", __FUNCTION__); - return mnt; -} - -/* - * nfs_do_refmount - handle crossing a referral on server - * @dentry - dentry of referral - * @nd - nameidata info - * - */ -struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) -{ - struct vfsmount *mnt = ERR_PTR(-ENOENT); - struct dentry *parent; - struct nfs4_fs_locations *fs_locations = NULL; - struct page *page; - int err; - - /* BUG_ON(IS_ROOT(dentry)); */ - dprintk("%s: enter\n", __FUNCTION__); - - page = alloc_page(GFP_KERNEL); - if (page == NULL) - goto out; - - fs_locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); - if (fs_locations == NULL) - goto out_free; - - /* Get locations */ - parent = dget_parent(dentry); - dprintk("%s: getting locations for %s/%s\n", __FUNCTION__, parent->d_name.name, dentry->d_name.name); - err = nfs4_proc_fs_locations(parent->d_inode, dentry, fs_locations, page); - dput(parent); - if (err != 0 || fs_locations->nlocations <= 0 || - fs_locations->fs_path.ncomponents <= 0) - goto out_free; - - mnt = nfs_follow_referral(mnt_parent, dentry, fs_locations); -out_free: - __free_page(page); - kfree(fs_locations); -out: - dprintk("%s: done\n", __FUNCTION__); - return mnt; -} -#else -struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) -{ - return ERR_PTR(-ENOENT); -} -#endif - -extern int nfs_init_nfspagecache(void); -extern void nfs_destroy_nfspagecache(void); -extern int nfs_init_readpagecache(void); -extern void nfs_destroy_readpagecache(void); -extern int nfs_init_writepagecache(void); -extern void nfs_destroy_writepagecache(void); -#ifdef CONFIG_NFS_DIRECTIO -extern int nfs_init_directcache(void); -extern void nfs_destroy_directcache(void); -#endif - -static kmem_cache_t * nfs_inode_cachep; - -static struct inode *nfs_alloc_inode(struct super_block *sb) +struct inode *nfs_alloc_inode(struct super_block *sb) { struct nfs_inode *nfsi; nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); @@ -2837,11 +1084,19 @@ static struct inode *nfs_alloc_inode(struct super_block *sb) return &nfsi->vfs_inode; } -static void nfs_destroy_inode(struct inode *inode) +void nfs_destroy_inode(struct inode *inode) { kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); } +#define nfs4_init_once(nfsi) \ + do { \ + INIT_LIST_HEAD(&(nfsi)->open_states); \ + nfsi->delegation = NULL; \ + nfsi->delegation_state = 0; \ + init_rwsem(&nfsi->rwsem); \ + } while(0) + static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) { struct nfs_inode *nfsi = (struct nfs_inode *) foo; @@ -2862,7 +1117,7 @@ static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) } } -static int nfs_init_inodecache(void) +static int __init nfs_init_inodecache(void) { nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", sizeof(struct nfs_inode), @@ -2875,7 +1130,7 @@ static int nfs_init_inodecache(void) return 0; } -static void nfs_destroy_inodecache(void) +static void __exit nfs_destroy_inodecache(void) { if (kmem_cache_destroy(nfs_inode_cachep)) printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); @@ -2904,29 +1159,22 @@ static int __init init_nfs_fs(void) if (err) goto out1; -#ifdef CONFIG_NFS_DIRECTIO err = nfs_init_directcache(); if (err) goto out0; -#endif #ifdef CONFIG_PROC_FS rpc_proc_register(&nfs_rpcstat); #endif - err = register_filesystem(&nfs_fs_type); - if (err) - goto out; - if ((err = register_nfs4fs()) != 0) + if ((err = register_nfs_fs()) != 0) goto out; return 0; out: #ifdef CONFIG_PROC_FS rpc_proc_unregister("nfs"); #endif -#ifdef CONFIG_NFS_DIRECTIO nfs_destroy_directcache(); out0: -#endif nfs_destroy_writepagecache(); out1: nfs_destroy_readpagecache(); @@ -2940,9 +1188,7 @@ out4: static void __exit exit_nfs_fs(void) { -#ifdef CONFIG_NFS_DIRECTIO nfs_destroy_directcache(); -#endif nfs_destroy_writepagecache(); nfs_destroy_readpagecache(); nfs_destroy_inodecache(); @@ -2950,8 +1196,7 @@ static void __exit exit_nfs_fs(void) #ifdef CONFIG_PROC_FS rpc_proc_unregister("nfs"); #endif - unregister_filesystem(&nfs_fs_type); - unregister_nfs4fs(); + unregister_nfs_fs(); } /* Not quite true; I just maintain it */ diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h new file mode 100644 index 000000000000..5e51c4535b6f --- /dev/null +++ b/fs/nfs/internal.h @@ -0,0 +1,179 @@ +/* + * NFS internal definitions + */ + +#include <linux/mount.h> + +struct nfs_clone_mount { + const struct super_block *sb; + const struct dentry *dentry; + struct nfs_fh *fh; + struct nfs_fattr *fattr; + char *hostname; + char *mnt_path; + struct sockaddr_in *addr; + rpc_authflavor_t authflavor; +}; + +/* namespace-nfs4.c */ +#ifdef CONFIG_NFS_V4 +extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry); +#else +static inline +struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) +{ + return ERR_PTR(-ENOENT); +} +#endif + +/* callback_xdr.c */ +extern struct svc_version nfs4_callback_version1; + +/* pagelist.c */ +extern int __init nfs_init_nfspagecache(void); +extern void __exit nfs_destroy_nfspagecache(void); +extern int __init nfs_init_readpagecache(void); +extern void __exit nfs_destroy_readpagecache(void); +extern int __init nfs_init_writepagecache(void); +extern void __exit nfs_destroy_writepagecache(void); + +#ifdef CONFIG_NFS_DIRECTIO +extern int __init nfs_init_directcache(void); +extern void __exit nfs_destroy_directcache(void); +#else +#define nfs_init_directcache() (0) +#define nfs_destroy_directcache() do {} while(0) +#endif + +/* nfs2xdr.c */ +extern struct rpc_procinfo nfs_procedures[]; +extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); + +/* nfs3xdr.c */ +extern struct rpc_procinfo nfs3_procedures[]; +extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); + +/* nfs4xdr.c */ +extern int nfs_stat_to_errno(int); +extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); + +/* nfs4proc.c */ +extern struct rpc_procinfo nfs4_procedures[]; + +extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry, + struct nfs4_fs_locations *fs_locations, + struct page *page); + +/* inode.c */ +extern struct inode *nfs_alloc_inode(struct super_block *sb); +extern void nfs_destroy_inode(struct inode *); +extern int nfs_write_inode(struct inode *,int); +extern void nfs_clear_inode(struct inode *); +#ifdef CONFIG_NFS_V4 +extern void nfs4_clear_inode(struct inode *); +#endif + +/* super.c */ +extern struct file_system_type nfs_referral_nfs4_fs_type; +extern struct file_system_type clone_nfs_fs_type; +#ifdef CONFIG_NFS_V4 +extern struct file_system_type clone_nfs4_fs_type; +#endif +#ifdef CONFIG_PROC_FS +extern struct rpc_stat nfs_rpcstat; +#endif +extern int __init register_nfs_fs(void); +extern void __exit unregister_nfs_fs(void); + +/* namespace.c */ +extern char *nfs_path(const char *base, const struct dentry *dentry, + char *buffer, ssize_t buflen); + +/* + * Determine the mount path as a string + */ +static inline char *nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen) +{ + return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen); +} + +/* + * Determine the device name as a string + */ +static inline char *nfs_devname(const struct vfsmount *mnt_parent, + const struct dentry *dentry, + char *buffer, ssize_t buflen) +{ + return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen); +} + +/* + * Determine the actual block size (and log2 thereof) + */ +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); +} + +/* + * Determine the maximum file size for a superblock + */ +static inline +void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) +{ + sb->s_maxbytes = (loff_t)maxfilesize; + if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) + sb->s_maxbytes = MAX_LFS_FILESIZE; +} + +/* + * Check if the string represents a "valid" IPv4 address + */ +static inline int valid_ipaddr4(const char *buf) +{ + int rc, count, in[4]; + + rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]); + if (rc != 4) + return -EINVAL; + for (count = 0; count < 4; count++) { + if (in[count] > 255) + return -EINVAL; + } + return 0; +} diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 8ca44b7b25c3..19b98ca468eb 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -15,15 +15,64 @@ #include <linux/string.h> #include <linux/sunrpc/clnt.h> #include <linux/vfs.h> +#include "internal.h" #define NFSDBG_FACILITY NFSDBG_VFS -LIST_HEAD(nfs_automount_list); static void nfs_expire_automounts(void *list); + +LIST_HEAD(nfs_automount_list); static DECLARE_WORK(nfs_automount_task, nfs_expire_automounts, &nfs_automount_list); int nfs_mountpoint_expiry_timeout = 500 * HZ; /* + * nfs_path - reconstruct the path given an arbitrary dentry + * @base - arbitrary string to prepend to the path + * @dentry - pointer to dentry + * @buffer - result buffer + * @buflen - length of buffer + * + * Helper function for constructing the path from the + * root dentry to an arbitrary hashed dentry. + * + * This is mainly for use in figuring out the path on the + * server side when automounting on top of an existing partition. + */ +char *nfs_path(const char *base, const struct dentry *dentry, + char *buffer, ssize_t buflen) +{ + char *end = buffer+buflen; + int namelen; + + *--end = '\0'; + buflen--; + spin_lock(&dcache_lock); + while (!IS_ROOT(dentry)) { + namelen = dentry->d_name.len; + buflen -= namelen + 1; + if (buflen < 0) + goto Elong; + end -= namelen; + memcpy(end, dentry->d_name.name, namelen); + *--end = '/'; + dentry = dentry->d_parent; + } + spin_unlock(&dcache_lock); + namelen = strlen(base); + /* Strip off excess slashes in base string */ + while (namelen > 0 && base[namelen - 1] == '/') + namelen--; + buflen -= namelen; + if (buflen < 0) + goto Elong; + end -= namelen; + memcpy(end, base, namelen); + return end; +Elong: + return ERR_PTR(-ENAMETOOLONG); +} + +/* * nfs_follow_mountpoint - handle crossing a mountpoint on the server * @dentry - dentry of mountpoint * @nd - nameidata info @@ -117,3 +166,64 @@ void nfs_release_automount_timer(void) flush_scheduled_work(); } } + +/* + * Clone a mountpoint of the appropriate type + */ +static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname, + struct nfs_clone_mount *mountdata) +{ +#ifdef CONFIG_NFS_V4 + struct vfsmount *mnt = NULL; + switch (server->rpc_ops->version) { + case 2: + case 3: + mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata); + break; + case 4: + mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, mountdata); + } + return mnt; +#else + return vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata); +#endif +} + +/** + * nfs_do_submount - set up mountpoint when crossing a filesystem boundary + * @mnt_parent - mountpoint of parent directory + * @dentry - parent directory + * @fh - filehandle for new root dentry + * @fattr - attributes for new root inode + * + */ +struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent, + const struct dentry *dentry, struct nfs_fh *fh, + struct nfs_fattr *fattr) +{ + struct nfs_clone_mount mountdata = { + .sb = mnt_parent->mnt_sb, + .dentry = dentry, + .fh = fh, + .fattr = fattr, + }; + struct vfsmount *mnt = ERR_PTR(-ENOMEM); + char *page = (char *) __get_free_page(GFP_USER); + char *devname; + + dprintk("%s: submounting on %s/%s\n", __FUNCTION__, + dentry->d_parent->d_name.name, + dentry->d_name.name); + if (page == NULL) + goto out; + devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE); + mnt = (struct vfsmount *)devname; + if (IS_ERR(devname)) + goto free_page; + mnt = nfs_do_clone_mount(NFS_SB(mnt_parent->mnt_sb), devname, &mountdata); +free_page: + free_page((unsigned long)page); +out: + dprintk("%s: done\n", __FUNCTION__); + return mnt; +} diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index a7ed88f97a11..4a006f81666b 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -27,8 +27,6 @@ #define NFSDBG_FACILITY NFSDBG_XDR /* #define NFS_PARANOIA 1 */ -extern int nfs_stat_to_errno(int stat); - /* Mapping from NFS error code to "errno" error code. */ #define errno_NFSERR_IO EIO diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index cf186f0d2b3b..7143b1f82cea 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -20,11 +20,10 @@ #include <linux/nfs_mount.h> #include "iostat.h" +#include "internal.h" #define NFSDBG_FACILITY NFSDBG_PROC -extern struct rpc_procinfo nfs3_procedures[]; - /* A wrapper to handle the EJUKEBOX error message */ static int nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) @@ -809,8 +808,6 @@ nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, return status; } -extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); - static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data) { if (nfs3_async_handle_jukebox(task, data->inode)) diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index f70eee2cac05..0250269e9753 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -22,14 +22,13 @@ #include <linux/nfs3.h> #include <linux/nfs_fs.h> #include <linux/nfsacl.h> +#include "internal.h" #define NFSDBG_FACILITY NFSDBG_XDR /* Mapping from NFS error code to "errno" error code. */ #define errno_NFSERR_IO EIO -extern int nfs_stat_to_errno(int); - /* * Declare the space requirements for NFS arguments and replies as * number of 32bit-words diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c new file mode 100644 index 000000000000..ea38d27b74e6 --- /dev/null +++ b/fs/nfs/nfs4namespace.c @@ -0,0 +1,201 @@ +/* + * linux/fs/nfs/nfs4namespace.c + * + * Copyright (C) 2005 Trond Myklebust <Trond.Myklebust@netapp.com> + * + * NFSv4 namespace + */ + +#include <linux/config.h> + +#include <linux/dcache.h> +#include <linux/mount.h> +#include <linux/namei.h> +#include <linux/nfs_fs.h> +#include <linux/string.h> +#include <linux/sunrpc/clnt.h> +#include <linux/vfs.h> +#include <linux/inet.h> +#include "internal.h" + +#define NFSDBG_FACILITY NFSDBG_VFS + +/* + * Check if fs_root is valid + */ +static inline char *nfs4_pathname_string(struct nfs4_pathname *pathname, + char *buffer, ssize_t buflen) +{ + char *end = buffer + buflen; + int n; + + *--end = '\0'; + buflen--; + + n = pathname->ncomponents; + while (--n >= 0) { + struct nfs4_string *component = &pathname->components[n]; + buflen -= component->len + 1; + if (buflen < 0) + goto Elong; + end -= component->len; + memcpy(end, component->data, component->len); + *--end = '/'; + } + return end; +Elong: + return ERR_PTR(-ENAMETOOLONG); +} + + +/** + * nfs_follow_referral - set up mountpoint when hitting a referral on moved error + * @mnt_parent - mountpoint of parent directory + * @dentry - parent directory + * @fspath - fs path returned in fs_locations + * @mntpath - mount path to new server + * @hostname - hostname of new server + * @addr - host addr of new server + * + */ +static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent, + const struct dentry *dentry, + struct nfs4_fs_locations *locations) +{ + struct vfsmount *mnt = ERR_PTR(-ENOENT); + struct nfs_clone_mount mountdata = { + .sb = mnt_parent->mnt_sb, + .dentry = dentry, + .authflavor = NFS_SB(mnt_parent->mnt_sb)->client->cl_auth->au_flavor, + }; + char *page, *page2; + char *path, *fs_path; + char *devname; + int loc, s; + + if (locations == NULL || locations->nlocations <= 0) + goto out; + + dprintk("%s: referral at %s/%s\n", __FUNCTION__, + dentry->d_parent->d_name.name, dentry->d_name.name); + + /* Ensure fs path is a prefix of current dentry path */ + page = (char *) __get_free_page(GFP_USER); + if (page == NULL) + goto out; + page2 = (char *) __get_free_page(GFP_USER); + if (page2 == NULL) + goto out; + + path = nfs4_path(dentry, page, PAGE_SIZE); + if (IS_ERR(path)) + goto out_free; + + fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE); + if (IS_ERR(fs_path)) + goto out_free; + + if (strncmp(path, fs_path, strlen(fs_path)) != 0) { + dprintk("%s: path %s does not begin with fsroot %s\n", __FUNCTION__, path, fs_path); + goto out_free; + } + + devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE); + if (IS_ERR(devname)) { + mnt = (struct vfsmount *)devname; + goto out_free; + } + + loc = 0; + while (loc < locations->nlocations && IS_ERR(mnt)) { + struct nfs4_fs_location *location = &locations->locations[loc]; + char *mnt_path; + + if (location == NULL || location->nservers <= 0 || + location->rootpath.ncomponents == 0) { + loc++; + continue; + } + + mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE); + if (IS_ERR(mnt_path)) { + loc++; + continue; + } + mountdata.mnt_path = mnt_path; + + s = 0; + while (s < location->nservers) { + struct sockaddr_in addr = {}; + + if (location->servers[s].len <= 0 || + valid_ipaddr4(location->servers[s].data) < 0) { + s++; + continue; + } + + mountdata.hostname = location->servers[s].data; + addr.sin_addr.s_addr = in_aton(mountdata.hostname); + addr.sin_family = AF_INET; + addr.sin_port = htons(NFS_PORT); + mountdata.addr = &addr; + + mnt = vfs_kern_mount(&nfs_referral_nfs4_fs_type, 0, devname, &mountdata); + if (!IS_ERR(mnt)) { + break; + } + s++; + } + loc++; + } + +out_free: + free_page((unsigned long)page); + free_page((unsigned long)page2); +out: + dprintk("%s: done\n", __FUNCTION__); + return mnt; +} + +/* + * nfs_do_refmount - handle crossing a referral on server + * @dentry - dentry of referral + * @nd - nameidata info + * + */ +struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) +{ + struct vfsmount *mnt = ERR_PTR(-ENOENT); + struct dentry *parent; + struct nfs4_fs_locations *fs_locations = NULL; + struct page *page; + int err; + + /* BUG_ON(IS_ROOT(dentry)); */ + dprintk("%s: enter\n", __FUNCTION__); + + page = alloc_page(GFP_KERNEL); + if (page == NULL) + goto out; + + fs_locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); + if (fs_locations == NULL) + goto out_free; + + /* Get locations */ + parent = dget_parent(dentry); + dprintk("%s: getting locations for %s/%s\n", __FUNCTION__, parent->d_name.name, dentry->d_name.name); + err = nfs4_proc_fs_locations(parent->d_inode, dentry, fs_locations, page); + dput(parent); + if (err != 0 || fs_locations->nlocations <= 0 || + fs_locations->fs_path.ncomponents <= 0) + goto out_free; + + mnt = nfs_follow_referral(mnt_parent, dentry, fs_locations); +out_free: + __free_page(page); + kfree(fs_locations); +out: + dprintk("%s: done\n", __FUNCTION__); + return mnt; +} diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 3300e35d74ad..b4916b092194 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -65,8 +65,6 @@ static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *) static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp); -extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); -extern struct rpc_procinfo nfs4_procedures[]; /* Prevent leaks of NFSv4 errors into userland */ int nfs4_map_errors(int err) diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 656481c0daa3..ef9429643ebc 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -378,7 +378,7 @@ out: return res; } -int nfs_init_nfspagecache(void) +int __init nfs_init_nfspagecache(void) { nfs_page_cachep = kmem_cache_create("nfs_page", sizeof(struct nfs_page), @@ -390,7 +390,7 @@ int nfs_init_nfspagecache(void) return 0; } -void nfs_destroy_nfspagecache(void) +void __exit nfs_destroy_nfspagecache(void) { if (kmem_cache_destroy(nfs_page_cachep)) printk(KERN_INFO "nfs_page: not all structures were freed\n"); diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index 9dd85cac2df0..b3899ea3229e 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -44,11 +44,10 @@ #include <linux/nfs_page.h> #include <linux/lockd/bind.h> #include <linux/smp_lock.h> +#include "internal.h" #define NFSDBG_FACILITY NFSDBG_PROC -extern struct rpc_procinfo nfs_procedures[]; - /* * Bare-bones access to getattr: this is for nfs_read_super. */ @@ -611,8 +610,6 @@ nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, return 0; } -extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); - static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) { if (task->tk_status >= 0) { diff --git a/fs/nfs/read.c b/fs/nfs/read.c index fd9018c692bb..41c2ffee24f5 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -694,7 +694,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping, return ret; } -int nfs_init_readpagecache(void) +int __init nfs_init_readpagecache(void) { nfs_rdata_cachep = kmem_cache_create("nfs_read_data", sizeof(struct nfs_read_data), @@ -711,7 +711,7 @@ int nfs_init_readpagecache(void) return 0; } -void nfs_destroy_readpagecache(void) +void __exit nfs_destroy_readpagecache(void) { mempool_destroy(nfs_rdata_mempool); if (kmem_cache_destroy(nfs_rdata_cachep)) diff --git a/fs/nfs/super.c b/fs/nfs/super.c new file mode 100644 index 000000000000..4acd3ee96427 --- /dev/null +++ b/fs/nfs/super.c @@ -0,0 +1,1468 @@ +/* + * linux/fs/nfs/super.c + * + * Copyright (C) 1992 Rick Sladkey + * + * nfs superblock handling functions + * + * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some + * experimental NFS changes. Modularisation taken straight from SYS5 fs. + * + * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. + * J.S.Peatfield@damtp.cam.ac.uk + * + * Split from inode.c by David Howells <dhowells@redhat.com> + * + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/init.h> + +#include <linux/time.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/string.h> +#include <linux/stat.h> +#include <linux/errno.h> +#include <linux/unistd.h> +#include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/stats.h> +#include <linux/sunrpc/metrics.h> +#include <linux/nfs_fs.h> +#include <linux/nfs_mount.h> +#include <linux/nfs4_mount.h> +#include <linux/lockd/bind.h> +#include <linux/smp_lock.h> +#include <linux/seq_file.h> +#include <linux/mount.h> +#include <linux/nfs_idmap.h> +#include <linux/vfs.h> +#include <linux/inet.h> +#include <linux/nfs_xdr.h> + +#include <asm/system.h> +#include <asm/uaccess.h> + +#include "nfs4_fs.h" +#include "callback.h" +#include "delegation.h" +#include "iostat.h" +#include "internal.h" + +#define NFSDBG_FACILITY NFSDBG_VFS + +/* Maximum number of readahead requests + * FIXME: this should really be a sysctl so that users may tune it to suit + * their needs. People that do NFS over a slow network, might for + * instance want to reduce it to something closer to 1 for improved + * interactive response. + */ +#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) + +/* + * RPC cruft for NFS + */ +static struct rpc_version * nfs_version[] = { + NULL, + NULL, + &nfs_version2, +#if defined(CONFIG_NFS_V3) + &nfs_version3, +#elif defined(CONFIG_NFS_V4) + NULL, +#endif +#if defined(CONFIG_NFS_V4) + &nfs_version4, +#endif +}; + +static struct rpc_program nfs_program = { + .name = "nfs", + .number = NFS_PROGRAM, + .nrvers = ARRAY_SIZE(nfs_version), + .version = nfs_version, + .stats = &nfs_rpcstat, + .pipe_dir_name = "/nfs", +}; + +struct rpc_stat nfs_rpcstat = { + .program = &nfs_program +}; + + +#ifdef CONFIG_NFS_V3_ACL +static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; +static struct rpc_version * nfsacl_version[] = { + [3] = &nfsacl_version3, +}; + +struct rpc_program nfsacl_program = { + .name = "nfsacl", + .number = NFS_ACL_PROGRAM, + .nrvers = ARRAY_SIZE(nfsacl_version), + .version = nfsacl_version, + .stats = &nfsacl_rpcstat, +}; +#endif /* CONFIG_NFS_V3_ACL */ + +static void nfs_umount_begin(struct vfsmount *, int); +static int nfs_statfs(struct super_block *, struct kstatfs *); +static int nfs_show_options(struct seq_file *, struct vfsmount *); +static int nfs_show_stats(struct seq_file *, struct vfsmount *); +static struct super_block *nfs_get_sb(struct file_system_type *, int, const char *, void *); +static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); +static void nfs_kill_super(struct super_block *); + +static struct file_system_type nfs_fs_type = { + .owner = THIS_MODULE, + .name = "nfs", + .get_sb = nfs_get_sb, + .kill_sb = nfs_kill_super, + .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, +}; + +struct file_system_type clone_nfs_fs_type = { + .owner = THIS_MODULE, + .name = "nfs", + .get_sb = nfs_clone_nfs_sb, + .kill_sb = nfs_kill_super, + .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, +}; + +static struct super_operations nfs_sops = { + .alloc_inode = nfs_alloc_inode, + .destroy_inode = nfs_destroy_inode, + .write_inode = nfs_write_inode, + .statfs = nfs_statfs, + .clear_inode = nfs_clear_inode, + .umount_begin = nfs_umount_begin, + .show_options = nfs_show_options, + .show_stats = nfs_show_stats, +}; + +#ifdef CONFIG_NFS_V4 +static struct super_block *nfs4_get_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); +static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); +static struct super_block *nfs_referral_nfs4_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); +static void nfs4_kill_super(struct super_block *sb); + +static struct file_system_type nfs4_fs_type = { + .owner = THIS_MODULE, + .name = "nfs4", + .get_sb = nfs4_get_sb, + .kill_sb = nfs4_kill_super, + .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, +}; + +struct file_system_type clone_nfs4_fs_type = { + .owner = THIS_MODULE, + .name = "nfs4", + .get_sb = nfs_clone_nfs4_sb, + .kill_sb = nfs4_kill_super, + .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, +}; + +struct file_system_type nfs_referral_nfs4_fs_type = { + .owner = THIS_MODULE, + .name = "nfs4", + .get_sb = nfs_referral_nfs4_sb, + .kill_sb = nfs4_kill_super, + .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, +}; + +static struct super_operations nfs4_sops = { + .alloc_inode = nfs_alloc_inode, + .destroy_inode = nfs_destroy_inode, + .write_inode = nfs_write_inode, + .statfs = nfs_statfs, + .clear_inode = nfs4_clear_inode, + .umount_begin = nfs_umount_begin, + .show_options = nfs_show_options, + .show_stats = nfs_show_stats, +}; +#endif + +static const int nfs_set_port_min = 0; +static const int nfs_set_port_max = 65535; + +static int param_set_port(const char *val, struct kernel_param *kp) +{ + char *endp; + int num = simple_strtol(val, &endp, 0); + if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max) + return -EINVAL; + *((int *)kp->arg) = num; + return 0; +} + +module_param_call(callback_tcpport, param_set_port, param_get_int, + &nfs_callback_set_tcpport, 0644); + +static int param_set_idmap_timeout(const char *val, struct kernel_param *kp) +{ + char *endp; + int num = simple_strtol(val, &endp, 0); + int jif = num * HZ; + if (endp == val || *endp || num < 0 || jif < num) + return -EINVAL; + *((int *)kp->arg) = jif; + return 0; +} + +module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int, + &nfs_idmap_cache_timeout, 0644); + +/* + * Register the NFS filesystems + */ +int __init register_nfs_fs(void) +{ + int ret; + + ret = register_filesystem(&nfs_fs_type); + if (ret < 0) + goto error_0; + +#ifdef CONFIG_NFS_V4 + ret = nfs_register_sysctl(); + if (ret < 0) + goto error_1; + ret = register_filesystem(&nfs4_fs_type); + if (ret < 0) + goto error_2; +#endif + return 0; + +#ifdef CONFIG_NFS_V4 +error_2: + nfs_unregister_sysctl(); +error_1: + unregister_filesystem(&nfs_fs_type); +#endif +error_0: + return ret; +} + +/* + * Unregister the NFS filesystems + */ +void __exit unregister_nfs_fs(void) +{ +#ifdef CONFIG_NFS_V4 + unregister_filesystem(&nfs4_fs_type); + nfs_unregister_sysctl(); +#endif + unregister_filesystem(&nfs_fs_type); +} + +/* + * Deliver file system statistics to userspace + */ +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; + +} + +/* + * Describe the mount options in force on this server representation + */ +static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) +{ + static struct proc_nfs_info { + int flag; + char *str; + char *nostr; + } nfs_info[] = { + { NFS_MOUNT_SOFT, ",soft", ",hard" }, + { NFS_MOUNT_INTR, ",intr", "" }, + { NFS_MOUNT_NOCTO, ",nocto", "" }, + { NFS_MOUNT_NOAC, ",noac", "" }, + { NFS_MOUNT_NONLM, ",nolock", "" }, + { NFS_MOUNT_NOACL, ",noacl", "" }, + { 0, NULL, NULL } + }; + struct proc_nfs_info *nfs_infop; + char buf[12]; + char *proto; + + seq_printf(m, ",vers=%d", nfss->rpc_ops->version); + seq_printf(m, ",rsize=%d", nfss->rsize); + seq_printf(m, ",wsize=%d", nfss->wsize); + if (nfss->acregmin != 3*HZ || showdefaults) + seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); + if (nfss->acregmax != 60*HZ || showdefaults) + seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); + if (nfss->acdirmin != 30*HZ || showdefaults) + seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); + if (nfss->acdirmax != 60*HZ || showdefaults) + 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_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ); + seq_printf(m, ",retrans=%u", nfss->retrans_count); +} + +/* + * Describe the mount options on this VFS mountpoint + */ +static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) +{ + struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); + + nfs_show_mount_options(m, nfss, 0); + + seq_puts(m, ",addr="); + seq_escape(m, nfss->hostname, " \t\n\\"); + + return 0; +} + +/* + * Present statistical information for this VFS mountpoint + */ +static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) +{ + int i, cpu; + struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); + struct rpc_auth *auth = nfss->client->cl_auth; + struct nfs_iostats totals = { }; + + seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); + + /* + * Display all mount option settings + */ + seq_printf(m, "\n\topts:\t"); + seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); + seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); + seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); + seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); + nfs_show_mount_options(m, nfss, 1); + + seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); + + seq_printf(m, "\n\tcaps:\t"); + seq_printf(m, "caps=0x%x", nfss->caps); + seq_printf(m, ",wtmult=%d", nfss->wtmult); + seq_printf(m, ",dtsize=%d", nfss->dtsize); + seq_printf(m, ",bsize=%d", nfss->bsize); + seq_printf(m, ",namelen=%d", nfss->namelen); + +#ifdef CONFIG_NFS_V4 + if (nfss->rpc_ops->version == 4) { + seq_printf(m, "\n\tnfsv4:\t"); + seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); + seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); + seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); + } +#endif + + /* + * Display security flavor in effect for this mount + */ + seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); + if (auth->au_flavor) + seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); + + /* + * Display superblock I/O counters + */ + for_each_possible_cpu(cpu) { + struct nfs_iostats *stats; + + preempt_disable(); + stats = per_cpu_ptr(nfss->io_stats, cpu); + + for (i = 0; i < __NFSIOS_COUNTSMAX; i++) + totals.events[i] += stats->events[i]; + for (i = 0; i < __NFSIOS_BYTESMAX; i++) + totals.bytes[i] += stats->bytes[i]; + + preempt_enable(); + } + + seq_printf(m, "\n\tevents:\t"); + for (i = 0; i < __NFSIOS_COUNTSMAX; i++) + seq_printf(m, "%lu ", totals.events[i]); + seq_printf(m, "\n\tbytes:\t"); + for (i = 0; i < __NFSIOS_BYTESMAX; i++) + seq_printf(m, "%Lu ", totals.bytes[i]); + seq_printf(m, "\n"); + + rpc_print_iostats(m, nfss->client); + + return 0; +} + +/* + * Begin unmount by attempting to remove all automounted mountpoints we added + * in response to traversals + */ +static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) +{ + struct nfs_server *server; + struct rpc_clnt *rpc; + + shrink_submounts(vfsmnt, &nfs_automount_list); + if (!(flags & MNT_FORCE)) + return; + /* -EIO all pending I/O */ + server = NFS_SB(vfsmnt->mnt_sb); + rpc = server->client; + if (!IS_ERR(rpc)) + rpc_killall_tasks(rpc); + rpc = server->client_acl; + if (!IS_ERR(rpc)) + rpc_killall_tasks(rpc); +} + +/* + * 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); + 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); + } + + server->fsid = fsinfo->fattr->fsid; + return nfs_fhget(sb, rootfh, fsinfo->fattr); +} + +/* + * 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; + + server->io_stats = nfs_alloc_iostats(); + if (server->io_stats == NULL) + return -ENOMEM; + + 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; + + /* mount time stamp, in seconds */ + server->mount_time = jiffies; + + /* 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; + + nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); + + server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0; + server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 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; +} + +/* + * Initialise the timeout values for a connection + */ +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); + + server->retrans_timeo = timeparms.to_initval; + server->retrans_count = timeparms.to_retries; + + /* 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; + + return clnt; + +out_fail: + return clnt; +} + +/* + * Clone a server record + */ +static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data) +{ + struct nfs_server *server = NFS_SB(sb); + struct nfs_server *parent = NFS_SB(data->sb); + struct inode *root_inode; + struct nfs_fsinfo fsinfo; + void *err = ERR_PTR(-ENOMEM); + + sb->s_op = data->sb->s_op; + sb->s_blocksize = data->sb->s_blocksize; + sb->s_blocksize_bits = data->sb->s_blocksize_bits; + sb->s_maxbytes = data->sb->s_maxbytes; + + server->client_sys = server->client_acl = ERR_PTR(-EINVAL); + server->io_stats = nfs_alloc_iostats(); + if (server->io_stats == NULL) + goto out; + + server->client = rpc_clone_client(parent->client); + if (IS_ERR((err = server->client))) + goto out; + + if (!IS_ERR(parent->client_sys)) { + server->client_sys = rpc_clone_client(parent->client_sys); + if (IS_ERR((err = server->client_sys))) + goto out; + } + if (!IS_ERR(parent->client_acl)) { + server->client_acl = rpc_clone_client(parent->client_acl); + if (IS_ERR((err = server->client_acl))) + goto out; + } + root_inode = nfs_fhget(sb, data->fh, data->fattr); + if (!root_inode) + goto out; + sb->s_root = d_alloc_root(root_inode); + if (!sb->s_root) + goto out_put_root; + fsinfo.fattr = data->fattr; + if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0) + nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); + sb->s_root->d_op = server->rpc_ops->dentry_ops; + sb->s_flags |= MS_ACTIVE; + return server; +out_put_root: + iput(root_inode); +out: + return err; +} + +/* + * Copy an existing superblock and attach revised data + */ +static struct super_block *nfs_clone_generic_sb(struct nfs_clone_mount *data, + struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *), + struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *)) +{ + struct nfs_server *server; + struct nfs_server *parent = NFS_SB(data->sb); + struct super_block *sb = ERR_PTR(-EINVAL); + void *err = ERR_PTR(-ENOMEM); + char *hostname; + int len; + + server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); + if (server == NULL) + goto out_err; + memcpy(server, parent, sizeof(*server)); + hostname = (data->hostname != NULL) ? data->hostname : parent->hostname; + len = strlen(hostname) + 1; + server->hostname = kmalloc(len, GFP_KERNEL); + if (server->hostname == NULL) + goto free_server; + memcpy(server->hostname, hostname, len); + if (rpciod_up() != 0) + goto free_hostname; + + sb = fill_sb(server, data); + if (IS_ERR((err = sb)) || sb->s_root) + goto kill_rpciod; + + server = fill_server(sb, data); + if (IS_ERR((err = server))) + goto out_deactivate; + return sb; +out_deactivate: + up_write(&sb->s_umount); + deactivate_super(sb); + return (struct super_block *)err; +kill_rpciod: + rpciod_down(); +free_hostname: + kfree(server->hostname); +free_server: + kfree(server); +out_err: + return (struct super_block *)err; +} + +/* + * Set up an NFS2/3 superblock + * + * 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_set_super(struct super_block *s, void *data) +{ + s->s_fs_info = data; + return set_anon_super(s, data); +} + +static int nfs_compare_super(struct super_block *sb, void *data) +{ + struct nfs_server *server = data; + struct nfs_server *old = NFS_SB(sb); + + if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr) + return 0; + if (old->addr.sin_port != server->addr.sin_port) + return 0; + return !nfs_compare_fh(&old->fh, &server->fh); +} + +static struct super_block *nfs_get_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data) +{ + int error; + struct nfs_server *server = NULL; + struct super_block *s; + struct nfs_fh *root; + struct nfs_mount_data *data = raw_data; + + s = ERR_PTR(-EINVAL); + if (data == NULL) { + dprintk("%s: missing data argument\n", __FUNCTION__); + goto out_err; + } + if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) { + dprintk("%s: bad mount version\n", __FUNCTION__); + goto out_err; + } + switch (data->version) { + case 1: + data->namlen = 0; + case 2: + data->bsize = 0; + case 3: + if (data->flags & NFS_MOUNT_VER3) { + dprintk("%s: mount structure version %d does not support NFSv3\n", + __FUNCTION__, + data->version); + goto out_err; + } + data->root.size = NFS2_FHSIZE; + memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); + case 4: + if (data->flags & NFS_MOUNT_SECFLAVOUR) { + dprintk("%s: mount structure version %d does not support strong security\n", + __FUNCTION__, + data->version); + goto out_err; + } + case 5: + memset(data->context, 0, sizeof(data->context)); + } +#ifndef CONFIG_NFS_V3 + /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */ + s = ERR_PTR(-EPROTONOSUPPORT); + if (data->flags & NFS_MOUNT_VER3) { + dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__); + goto out_err; + } +#endif /* CONFIG_NFS_V3 */ + + s = ERR_PTR(-ENOMEM); + server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); + if (!server) + goto out_err; + /* Zero out the NFS state stuff */ + init_nfsv4_state(server); + server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); + + root = &server->fh; + if (data->flags & NFS_MOUNT_VER3) + root->size = data->root.size; + else + root->size = NFS2_FHSIZE; + s = ERR_PTR(-EINVAL); + if (root->size > sizeof(root->data)) { + dprintk("%s: invalid root filehandle\n", __FUNCTION__); + goto out_err; + } + memcpy(root->data, data->root.data, root->size); + + /* We now require that the mount process passes the remote address */ + memcpy(&server->addr, &data->addr, sizeof(server->addr)); + if (server->addr.sin_addr.s_addr == INADDR_ANY) { + dprintk("%s: mount program didn't pass remote address!\n", + __FUNCTION__); + goto out_err; + } + + /* Fire up rpciod if not yet running */ + s = ERR_PTR(rpciod_up()); + if (IS_ERR(s)) { + dprintk("%s: couldn't start rpciod! Error = %ld\n", + __FUNCTION__, PTR_ERR(s)); + goto out_err; + } + + s = sget(fs_type, nfs_compare_super, nfs_set_super, server); + if (IS_ERR(s) || s->s_root) + goto out_rpciod_down; + + s->s_flags = flags; + + error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0); + if (error) { + up_write(&s->s_umount); + deactivate_super(s); + return ERR_PTR(error); + } + s->s_flags |= MS_ACTIVE; + return s; +out_rpciod_down: + rpciod_down(); +out_err: + kfree(server); + return s; +} + +static void nfs_kill_super(struct super_block *s) +{ + struct nfs_server *server = NFS_SB(s); + + kill_anon_super(s); + + if (!IS_ERR(server->client)) + rpc_shutdown_client(server->client); + if (!IS_ERR(server->client_sys)) + rpc_shutdown_client(server->client_sys); + if (!IS_ERR(server->client_acl)) + rpc_shutdown_client(server->client_acl); + + if (!(server->flags & NFS_MOUNT_NONLM)) + lockd_down(); /* release rpc.lockd */ + + rpciod_down(); /* release rpciod */ + + nfs_free_iostats(server->io_stats); + kfree(server->hostname); + kfree(server); + nfs_release_automount_timer(); +} + +static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data) +{ + struct super_block *sb; + + server->fsid = data->fattr->fsid; + nfs_copy_fh(&server->fh, data->fh); + sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server); + if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM)) + lockd_up(); + return sb; +} + +static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data) +{ + struct nfs_clone_mount *data = raw_data; + return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server); +} + +#ifdef CONFIG_NFS_V4 +static struct rpc_clnt *nfs4_create_client(struct nfs_server *server, + struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor) +{ + struct nfs4_client *clp; + struct rpc_xprt *xprt = NULL; + struct rpc_clnt *clnt = NULL; + int err = -EIO; + + clp = nfs4_get_client(&server->addr.sin_addr); + if (!clp) { + dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__); + return ERR_PTR(err); + } + + /* Now create transport and client */ + down_write(&clp->cl_sem); + if (IS_ERR(clp->cl_rpcclient)) { + xprt = xprt_create_proto(proto, &server->addr, timeparms); + if (IS_ERR(xprt)) { + up_write(&clp->cl_sem); + err = PTR_ERR(xprt); + dprintk("%s: cannot create RPC transport. Error = %d\n", + __FUNCTION__, err); + goto out_fail; + } + /* Bind to a reserved port! */ + xprt->resvport = 1; + clnt = rpc_create_client(xprt, server->hostname, &nfs_program, + server->rpc_ops->version, flavor); + if (IS_ERR(clnt)) { + up_write(&clp->cl_sem); + err = PTR_ERR(clnt); + dprintk("%s: cannot create RPC client. Error = %d\n", + __FUNCTION__, err); + goto out_fail; + } + clnt->cl_intr = 1; + clnt->cl_softrtry = 1; + clp->cl_rpcclient = clnt; + memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr)); + nfs_idmap_new(clp); + } + list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); + clnt = rpc_clone_client(clp->cl_rpcclient); + if (!IS_ERR(clnt)) + server->nfs4_state = clp; + up_write(&clp->cl_sem); + clp = NULL; + + if (IS_ERR(clnt)) { + dprintk("%s: cannot create RPC client. Error = %d\n", + __FUNCTION__, err); + return clnt; + } + + if (server->nfs4_state->cl_idmap == NULL) { + dprintk("%s: failed to create idmapper.\n", __FUNCTION__); + return ERR_PTR(-ENOMEM); + } + + if (clnt->cl_auth->au_flavor != flavor) { + struct rpc_auth *auth; + + auth = rpcauth_create(flavor, clnt); + if (IS_ERR(auth)) { + dprintk("%s: couldn't create credcache!\n", __FUNCTION__); + return (struct rpc_clnt *)auth; + } + } + return clnt; + + out_fail: + if (clp) + nfs4_put_client(clp); + return ERR_PTR(err); +} + +/* + * Set up an NFS4 superblock + */ +static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent) +{ + struct nfs_server *server; + struct rpc_timeout timeparms; + rpc_authflavor_t authflavour; + int err = -EIO; + + sb->s_blocksize_bits = 0; + sb->s_blocksize = 0; + server = NFS_SB(sb); + if (data->rsize != 0) + server->rsize = nfs_block_size(data->rsize, NULL); + if (data->wsize != 0) + server->wsize = nfs_block_size(data->wsize, NULL); + server->flags = data->flags & NFS_MOUNT_FLAGMASK; + server->caps = NFS_CAP_ATOMIC_OPEN; + + server->acregmin = data->acregmin*HZ; + server->acregmax = data->acregmax*HZ; + server->acdirmin = data->acdirmin*HZ; + server->acdirmax = data->acdirmax*HZ; + + server->rpc_ops = &nfs_v4_clientops; + + nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans); + + server->retrans_timeo = timeparms.to_initval; + server->retrans_count = timeparms.to_retries; + + /* Now create transport and client */ + authflavour = RPC_AUTH_UNIX; + if (data->auth_flavourlen != 0) { + if (data->auth_flavourlen != 1) { + dprintk("%s: Invalid number of RPC auth flavours %d.\n", + __FUNCTION__, data->auth_flavourlen); + err = -EINVAL; + goto out_fail; + } + if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) { + err = -EFAULT; + goto out_fail; + } + } + + server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour); + if (IS_ERR(server->client)) { + err = PTR_ERR(server->client); + dprintk("%s: cannot create RPC client. Error = %d\n", + __FUNCTION__, err); + goto out_fail; + } + + sb->s_time_gran = 1; + + sb->s_op = &nfs4_sops; + err = nfs_sb_init(sb, authflavour); + + out_fail: + return err; +} + +static int nfs4_compare_super(struct super_block *sb, void *data) +{ + struct nfs_server *server = data; + struct nfs_server *old = NFS_SB(sb); + + if (strcmp(server->hostname, old->hostname) != 0) + return 0; + if (strcmp(server->mnt_path, old->mnt_path) != 0) + return 0; + return 1; +} + +static void * +nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen) +{ + void *p = NULL; + + if (!src->len) + return ERR_PTR(-EINVAL); + if (src->len < maxlen) + maxlen = src->len; + if (dst == NULL) { + p = dst = kmalloc(maxlen + 1, GFP_KERNEL); + if (p == NULL) + return ERR_PTR(-ENOMEM); + } + if (copy_from_user(dst, src->data, maxlen)) { + kfree(p); + return ERR_PTR(-EFAULT); + } + dst[maxlen] = '\0'; + return dst; +} + +static struct super_block *nfs4_get_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data) +{ + int error; + struct nfs_server *server; + struct super_block *s; + struct nfs4_mount_data *data = raw_data; + void *p; + + if (data == NULL) { + dprintk("%s: missing data argument\n", __FUNCTION__); + return ERR_PTR(-EINVAL); + } + if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) { + dprintk("%s: bad mount version\n", __FUNCTION__); + return ERR_PTR(-EINVAL); + } + + server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); + if (!server) + return ERR_PTR(-ENOMEM); + /* Zero out the NFS state stuff */ + init_nfsv4_state(server); + server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); + + p = nfs_copy_user_string(NULL, &data->hostname, 256); + if (IS_ERR(p)) + goto out_err; + server->hostname = p; + + p = nfs_copy_user_string(NULL, &data->mnt_path, 1024); + if (IS_ERR(p)) + goto out_err; + server->mnt_path = p; + + p = nfs_copy_user_string(server->ip_addr, &data->client_addr, + sizeof(server->ip_addr) - 1); + if (IS_ERR(p)) + goto out_err; + + /* We now require that the mount process passes the remote address */ + if (data->host_addrlen != sizeof(server->addr)) { + s = ERR_PTR(-EINVAL); + goto out_free; + } + if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) { + s = ERR_PTR(-EFAULT); + goto out_free; + } + if (server->addr.sin_family != AF_INET || + server->addr.sin_addr.s_addr == INADDR_ANY) { + dprintk("%s: mount program didn't pass remote IP address!\n", + __FUNCTION__); + s = ERR_PTR(-EINVAL); + goto out_free; + } + + /* Fire up rpciod if not yet running */ + s = ERR_PTR(rpciod_up()); + if (IS_ERR(s)) { + dprintk("%s: couldn't start rpciod! Error = %ld\n", + __FUNCTION__, PTR_ERR(s)); + goto out_free; + } + + s = sget(fs_type, nfs4_compare_super, nfs_set_super, server); + + if (IS_ERR(s) || s->s_root) + goto out_free; + + s->s_flags = flags; + + error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0); + if (error) { + up_write(&s->s_umount); + deactivate_super(s); + return ERR_PTR(error); + } + s->s_flags |= MS_ACTIVE; + return s; +out_err: + s = (struct super_block *)p; +out_free: + kfree(server->mnt_path); + kfree(server->hostname); + kfree(server); + return s; +} + +static void nfs4_kill_super(struct super_block *sb) +{ + struct nfs_server *server = NFS_SB(sb); + + nfs_return_all_delegations(sb); + kill_anon_super(sb); + + nfs4_renewd_prepare_shutdown(server); + + if (server->client != NULL && !IS_ERR(server->client)) + rpc_shutdown_client(server->client); + + destroy_nfsv4_state(server); + + rpciod_down(); + + nfs_free_iostats(server->io_stats); + kfree(server->hostname); + kfree(server); + nfs_release_automount_timer(); +} + +/* + * Constructs the SERVER-side path + */ +static inline char *nfs4_dup_path(const struct dentry *dentry) +{ + char *page = (char *) __get_free_page(GFP_USER); + char *path; + + path = nfs4_path(dentry, page, PAGE_SIZE); + if (!IS_ERR(path)) { + int len = PAGE_SIZE + page - path; + char *tmp = path; + + path = kmalloc(len, GFP_KERNEL); + if (path) + memcpy(path, tmp, len); + else + path = ERR_PTR(-ENOMEM); + } + free_page((unsigned long)page); + return path; +} + +static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data) +{ + const struct dentry *dentry = data->dentry; + struct nfs4_client *clp = server->nfs4_state; + struct super_block *sb; + + server->fsid = data->fattr->fsid; + nfs_copy_fh(&server->fh, data->fh); + server->mnt_path = nfs4_dup_path(dentry); + if (IS_ERR(server->mnt_path)) { + sb = (struct super_block *)server->mnt_path; + goto err; + } + sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server); + if (IS_ERR(sb) || sb->s_root) + goto free_path; + nfs4_server_capabilities(server, &server->fh); + + down_write(&clp->cl_sem); + atomic_inc(&clp->cl_count); + list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); + up_write(&clp->cl_sem); + return sb; +free_path: + kfree(server->mnt_path); +err: + server->mnt_path = NULL; + return sb; +} + +static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data) +{ + struct nfs_clone_mount *data = raw_data; + return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server); +} + +static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data) +{ + struct super_block *sb = ERR_PTR(-ENOMEM); + int len; + + len = strlen(data->mnt_path) + 1; + server->mnt_path = kmalloc(len, GFP_KERNEL); + if (server->mnt_path == NULL) + goto err; + memcpy(server->mnt_path, data->mnt_path, len); + memcpy(&server->addr, data->addr, sizeof(struct sockaddr_in)); + + sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server); + if (IS_ERR(sb) || sb->s_root) + goto free_path; + return sb; +free_path: + kfree(server->mnt_path); +err: + server->mnt_path = NULL; + return sb; +} + +static struct nfs_server *nfs4_referral_server(struct super_block *sb, struct nfs_clone_mount *data) +{ + struct nfs_server *server = NFS_SB(sb); + struct rpc_timeout timeparms; + int proto, timeo, retrans; + void *err; + + proto = IPPROTO_TCP; + /* Since we are following a referral and there may be alternatives, + set the timeouts and retries to low values */ + timeo = 2; + retrans = 1; + nfs_init_timeout_values(&timeparms, proto, timeo, retrans); + + server->client = nfs4_create_client(server, &timeparms, proto, data->authflavor); + if (IS_ERR((err = server->client))) + goto out_err; + + sb->s_time_gran = 1; + sb->s_op = &nfs4_sops; + err = ERR_PTR(nfs_sb_init(sb, data->authflavor)); + if (!IS_ERR(err)) + return server; +out_err: + return (struct nfs_server *)err; +} + +static struct super_block *nfs_referral_nfs4_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data) +{ + struct nfs_clone_mount *data = raw_data; + return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server); +} + +#endif diff --git a/fs/nfs/write.c b/fs/nfs/write.c index e03abbd8302e..b383fdd3a15c 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1529,7 +1529,7 @@ int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start, return ret; } -int nfs_init_writepagecache(void) +int __init nfs_init_writepagecache(void) { nfs_wdata_cachep = kmem_cache_create("nfs_write_data", sizeof(struct nfs_write_data), @@ -1551,7 +1551,7 @@ int nfs_init_writepagecache(void) return 0; } -void nfs_destroy_writepagecache(void) +void __exit nfs_destroy_writepagecache(void) { mempool_destroy(nfs_commit_mempool); mempool_destroy(nfs_wdata_mempool); |