*
*/
+#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.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/mount.h>
#include <linux/nfs_idmap.h>
#include <linux/vfs.h>
-#include <linux/inet.h>
-#include <linux/nfs_xdr.h>
#include <linux/vserver/xid.h>
#include <asm/system.h>
#include "nfs4_fs.h"
#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_delete_inode(struct inode *);
+static void nfs_clear_inode(struct inode *);
+static void nfs_umount_begin(struct super_block *);
+static int nfs_statfs(struct super_block *, struct kstatfs *);
+static int nfs_show_options(struct seq_file *, struct vfsmount *);
static void nfs_zap_acl_cache(struct inode *);
-static kmem_cache_t * nfs_inode_cachep;
+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,
+ .delete_inode = nfs_delete_inode,
+ .statfs = nfs_statfs,
+ .clear_inode = nfs_clear_inode,
+ .umount_begin = nfs_umount_begin,
+ .show_options = nfs_show_options,
+};
+
+/*
+ * 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
+};
-int nfs_write_inode(struct inode *inode, int sync)
+static struct rpc_program nfs_program = {
+ .name = "nfs",
+ .number = NFS_PROGRAM,
+ .nrvers = sizeof(nfs_version) / sizeof(nfs_version[0]),
+ .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 = sizeof(nfsacl_version) / sizeof(nfsacl_version[0]),
+ .version = nfsacl_version,
+ .stats = &nfsacl_rpcstat,
+};
+#endif /* CONFIG_NFS_V3_ACL */
+
+static inline unsigned long
+nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
{
- int flags = sync ? FLUSH_SYNC : 0;
+ return nfs_fileid_to_ino_t(fattr->fileid);
+}
+
+static int
+nfs_write_inode(struct inode *inode, int sync)
+{
+ int flags = sync ? FLUSH_WAIT : 0;
int ret;
ret = nfs_commit_inode(inode, flags);
return 0;
}
-void nfs_clear_inode(struct inode *inode)
+static void
+nfs_delete_inode(struct inode * inode)
{
- struct nfs_inode *nfsi = NFS_I(inode);
- struct rpc_cred *cred;
+ dprintk("NFS: delete_inode(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino);
+
+ truncate_inode_pages(&inode->i_data, 0);
+ nfs_wb_all(inode);
/*
* The following should never happen...
*/
- BUG_ON(nfs_have_writebacks(inode));
+ if (nfs_have_writebacks(inode)) {
+ printk(KERN_ERR "nfs_delete_inode: inode %ld has pending RPC requests\n", inode->i_ino);
+ }
+
+ clear_inode(inode);
+}
+
+static void
+nfs_clear_inode(struct inode *inode)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+ struct rpc_cred *cred;
+
+ nfs_wb_all(inode);
BUG_ON (!list_empty(&nfsi->open_files));
nfs_zap_acl_cache(inode);
cred = nfsi->cache_access.cred;
if (cred)
put_rpccred(cred);
-
- nfs_fscache_release_fh_cookie(NFS_SERVER(inode), nfsi);
BUG_ON(atomic_read(&nfsi->data_updates) != 0);
}
+void
+nfs_umount_begin(struct super_block *sb)
+{
+ struct rpc_clnt *rpc = NFS_SB(sb)->client;
+
+ /* -EIO all pending I/O */
+ if (!IS_ERR(rpc))
+ rpc_killall_tasks(rpc);
+ rpc = NFS_SB(sb)->client_acl;
+ if (!IS_ERR(rpc))
+ rpc_killall_tasks(rpc);
+}
+
+
+static inline unsigned long
+nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
+{
+ /* make sure blocksize is a power of two */
+ if ((bsize & (bsize - 1)) || nrbitsp) {
+ unsigned char nrbits;
+
+ for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
+ ;
+ bsize = 1 << nrbits;
+ if (nrbitsp)
+ *nrbitsp = nrbits;
+ }
+
+ return bsize;
+}
+
+/*
+ * Calculate the number of 512byte blocks used.
+ */
+static inline unsigned long
+nfs_calc_block_size(u64 tsize)
+{
+ loff_t used = (tsize + 511) >> 9;
+ return (used > ULONG_MAX) ? ULONG_MAX : used;
+}
+
+/*
+ * Compute and set NFS server blocksize
+ */
+static inline unsigned long
+nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
+{
+ if (bsize < NFS_MIN_FILE_IO_SIZE)
+ bsize = NFS_DEF_FILE_IO_SIZE;
+ else if (bsize >= NFS_MAX_FILE_IO_SIZE)
+ bsize = NFS_MAX_FILE_IO_SIZE;
+
+ return nfs_block_bits(bsize, nrbitsp);
+}
+
+/*
+ * Obtain the root inode of the file system.
+ */
+static struct inode *
+nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
+{
+ struct nfs_server *server = NFS_SB(sb);
+ struct inode *rooti;
+ int error;
+
+ error = server->rpc_ops->getroot(server, rootfh, fsinfo);
+ if (error < 0) {
+ dprintk("nfs_get_root: getattr error = %d\n", -error);
+ return ERR_PTR(error);
+ }
+
+ rooti = nfs_fhget(sb, rootfh, fsinfo->fattr);
+ if (!rooti)
+ return ERR_PTR(-ENOMEM);
+ return rooti;
+}
+
+/*
+ * Do NFS version-independent mount processing, and sanity checking
+ */
+static int
+nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
+{
+ struct nfs_server *server;
+ struct inode *root_inode;
+ struct nfs_fattr fattr;
+ struct nfs_fsinfo fsinfo = {
+ .fattr = &fattr,
+ };
+ struct nfs_pathconf pathinfo = {
+ .fattr = &fattr,
+ };
+ int no_root_error = 0;
+ unsigned long max_rpc_payload;
+
+ /* We probably want something more informative here */
+ snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
+
+ server = NFS_SB(sb);
+
+ sb->s_magic = NFS_SUPER_MAGIC;
+
+ root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
+ /* Did getting the root inode fail? */
+ if (IS_ERR(root_inode)) {
+ no_root_error = PTR_ERR(root_inode);
+ goto out_no_root;
+ }
+ sb->s_root = d_alloc_root(root_inode);
+ if (!sb->s_root) {
+ no_root_error = -ENOMEM;
+ goto out_no_root;
+ }
+ sb->s_root->d_op = server->rpc_ops->dentry_ops;
+
+ /* Get some general file system info */
+ if (server->namelen == 0 &&
+ server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
+ server->namelen = pathinfo.max_namelen;
+ /* Work out a lot of parameters */
+ if (server->rsize == 0)
+ server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
+ if (server->wsize == 0)
+ server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
+
+ if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
+ server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
+ if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
+ server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
+
+ max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
+ if (server->rsize > max_rpc_payload)
+ server->rsize = max_rpc_payload;
+ if (server->rsize > NFS_MAX_FILE_IO_SIZE)
+ server->rsize = NFS_MAX_FILE_IO_SIZE;
+ server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+
+ if (server->wsize > max_rpc_payload)
+ server->wsize = max_rpc_payload;
+ if (server->wsize > NFS_MAX_FILE_IO_SIZE)
+ server->wsize = NFS_MAX_FILE_IO_SIZE;
+ server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+
+ if (sb->s_blocksize == 0)
+ sb->s_blocksize = nfs_block_bits(server->wsize,
+ &sb->s_blocksize_bits);
+ server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
+
+ server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
+ if (server->dtsize > PAGE_CACHE_SIZE)
+ server->dtsize = PAGE_CACHE_SIZE;
+ if (server->dtsize > server->rsize)
+ server->dtsize = server->rsize;
+
+ if (server->flags & NFS_MOUNT_NOAC) {
+ server->acregmin = server->acregmax = 0;
+ server->acdirmin = server->acdirmax = 0;
+ sb->s_flags |= MS_SYNCHRONOUS;
+ }
+ server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
+
+ if (server->flags & NFS_MOUNT_TAGXID)
+ sb->s_flags |= MS_TAGXID;
+
+ sb->s_maxbytes = fsinfo.maxfilesize;
+ if (sb->s_maxbytes > MAX_LFS_FILESIZE)
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+
+ server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
+ server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
+ server->client->cl_tagxid = (server->flags & NFS_MOUNT_TAGXID) ? 1 : 0;
+
+ /* We're airborne Set socket buffersize */
+ rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
+ return 0;
+ /* Yargs. It didn't work out. */
+out_no_root:
+ dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
+ if (!IS_ERR(root_inode))
+ iput(root_inode);
+ return no_root_error;
+}
+
+static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
+{
+ to->to_initval = timeo * HZ / 10;
+ to->to_retries = retrans;
+ if (!to->to_retries)
+ to->to_retries = 2;
+
+ switch (proto) {
+ case IPPROTO_TCP:
+ if (!to->to_initval)
+ to->to_initval = 60 * HZ;
+ if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
+ to->to_initval = NFS_MAX_TCP_TIMEOUT;
+ to->to_increment = to->to_initval;
+ to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
+ to->to_exponential = 0;
+ break;
+ case IPPROTO_UDP:
+ default:
+ if (!to->to_initval)
+ to->to_initval = 11 * HZ / 10;
+ if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
+ to->to_initval = NFS_MAX_UDP_TIMEOUT;
+ to->to_maxval = NFS_MAX_UDP_TIMEOUT;
+ to->to_exponential = 1;
+ break;
+ }
+}
+
+/*
+ * Create an RPC client handle.
+ */
+static struct rpc_clnt *
+nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
+{
+ struct rpc_timeout timeparms;
+ struct rpc_xprt *xprt = NULL;
+ struct rpc_clnt *clnt = NULL;
+ int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
+
+ nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
+
+ /* create transport and client */
+ xprt = xprt_create_proto(proto, &server->addr, &timeparms);
+ if (IS_ERR(xprt)) {
+ dprintk("%s: cannot create RPC transport. Error = %ld\n",
+ __FUNCTION__, PTR_ERR(xprt));
+ return (struct rpc_clnt *)xprt;
+ }
+ clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
+ server->rpc_ops->version, data->pseudoflavor);
+ if (IS_ERR(clnt)) {
+ dprintk("%s: cannot create RPC client. Error = %ld\n",
+ __FUNCTION__, PTR_ERR(xprt));
+ goto out_fail;
+ }
+
+ clnt->cl_intr = 1;
+ clnt->cl_softrtry = 1;
+ clnt->cl_tagxid = 1;
+
+ return clnt;
+
+out_fail:
+ return clnt;
+}
+
+/*
+ * The way this works is that the mount process passes a structure
+ * in the data argument which contains the server's IP address
+ * and the root file handle obtained from the server's mount
+ * daemon. We stash these away in the private superblock fields.
+ */
+static int
+nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
+{
+ struct nfs_server *server;
+ rpc_authflavor_t authflavor;
+
+ server = NFS_SB(sb);
+ sb->s_blocksize_bits = 0;
+ sb->s_blocksize = 0;
+ if (data->bsize)
+ sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
+ if (data->rsize)
+ server->rsize = nfs_block_size(data->rsize, NULL);
+ if (data->wsize)
+ server->wsize = nfs_block_size(data->wsize, NULL);
+ server->flags = data->flags & NFS_MOUNT_FLAGMASK;
+
+ server->acregmin = data->acregmin*HZ;
+ server->acregmax = data->acregmax*HZ;
+ server->acdirmin = data->acdirmin*HZ;
+ server->acdirmax = data->acdirmax*HZ;
+
+ /* Start lockd here, before we might error out */
+ if (!(server->flags & NFS_MOUNT_NONLM))
+ lockd_up();
+
+ server->namelen = data->namlen;
+ server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
+ if (!server->hostname)
+ return -ENOMEM;
+ strcpy(server->hostname, data->hostname);
+
+ /* Check NFS protocol revision and initialize RPC op vector
+ * and file handle pool. */
+#ifdef CONFIG_NFS_V3
+ if (server->flags & NFS_MOUNT_VER3) {
+ server->rpc_ops = &nfs_v3_clientops;
+ server->caps |= NFS_CAP_READDIRPLUS;
+ } else {
+ server->rpc_ops = &nfs_v2_clientops;
+ }
+#else
+ server->rpc_ops = &nfs_v2_clientops;
+#endif
+
+ /* Fill in pseudoflavor for mount version < 5 */
+ if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
+ data->pseudoflavor = RPC_AUTH_UNIX;
+ authflavor = data->pseudoflavor; /* save for sb_init() */
+ /* XXX maybe we want to add a server->pseudoflavor field */
+
+ /* Create RPC client handles */
+ server->client = nfs_create_client(server, data);
+ if (IS_ERR(server->client))
+ return PTR_ERR(server->client);
+ /* RFC 2623, sec 2.3.2 */
+ if (authflavor != RPC_AUTH_UNIX) {
+ struct rpc_auth *auth;
+
+ server->client_sys = rpc_clone_client(server->client);
+ if (IS_ERR(server->client_sys))
+ return PTR_ERR(server->client_sys);
+ auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
+ if (IS_ERR(auth))
+ return PTR_ERR(auth);
+ } else {
+ atomic_inc(&server->client->cl_count);
+ server->client_sys = server->client;
+ }
+ if (server->flags & NFS_MOUNT_VER3) {
+#ifdef CONFIG_NFS_V3_ACL
+ if (!(server->flags & NFS_MOUNT_NOACL)) {
+ server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
+ /* No errors! Assume that Sun nfsacls are supported */
+ if (!IS_ERR(server->client_acl))
+ server->caps |= NFS_CAP_ACLS;
+ }
+#else
+ server->flags &= ~NFS_MOUNT_NOACL;
+#endif /* CONFIG_NFS_V3_ACL */
+ /*
+ * The VFS shouldn't apply the umask to mode bits. We will
+ * do so ourselves when necessary.
+ */
+ sb->s_flags |= MS_POSIXACL;
+ if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
+ server->namelen = NFS3_MAXNAMLEN;
+ sb->s_time_gran = 1;
+ } else {
+ if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
+ server->namelen = NFS2_MAXNAMLEN;
+ }
+
+ sb->s_op = &nfs_sops;
+ return nfs_sb_init(sb, authflavor);
+}
+
+static int
+nfs_statfs(struct super_block *sb, struct kstatfs *buf)
+{
+ struct nfs_server *server = NFS_SB(sb);
+ unsigned char blockbits;
+ unsigned long blockres;
+ struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
+ struct nfs_fattr fattr;
+ struct nfs_fsstat res = {
+ .fattr = &fattr,
+ };
+ int error;
+
+ lock_kernel();
+
+ error = server->rpc_ops->statfs(server, rootfh, &res);
+ buf->f_type = NFS_SUPER_MAGIC;
+ if (error < 0)
+ goto out_err;
+
+ /*
+ * Current versions of glibc do not correctly handle the
+ * case where f_frsize != f_bsize. Eventually we want to
+ * report the value of wtmult in this field.
+ */
+ buf->f_frsize = sb->s_blocksize;
+
+ /*
+ * On most *nix systems, f_blocks, f_bfree, and f_bavail
+ * are reported in units of f_frsize. Linux hasn't had
+ * an f_frsize field in its statfs struct until recently,
+ * thus historically Linux's sys_statfs reports these
+ * fields in units of f_bsize.
+ */
+ buf->f_bsize = sb->s_blocksize;
+ blockbits = sb->s_blocksize_bits;
+ blockres = (1 << blockbits) - 1;
+ buf->f_blocks = (res.tbytes + blockres) >> blockbits;
+ buf->f_bfree = (res.fbytes + blockres) >> blockbits;
+ buf->f_bavail = (res.abytes + blockres) >> blockbits;
+
+ buf->f_files = res.tfiles;
+ buf->f_ffree = res.afiles;
+
+ buf->f_namelen = server->namelen;
+ out:
+ unlock_kernel();
+ return 0;
+
+ out_err:
+ dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
+ buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
+ goto out;
+
+}
+
+static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
+{
+ static struct proc_nfs_info {
+ int flag;
+ char *str;
+ char *nostr;
+ } nfs_info[] = {
+ { NFS_MOUNT_SOFT, ",soft", ",hard" },
+ { NFS_MOUNT_INTR, ",intr", "" },
+ { NFS_MOUNT_POSIX, ",posix", "" },
+ { NFS_MOUNT_NOCTO, ",nocto", "" },
+ { NFS_MOUNT_NOAC, ",noac", "" },
+ { NFS_MOUNT_NONLM, ",nolock", ",lock" },
+ { NFS_MOUNT_NOACL, ",noacl", "" },
+ { NFS_MOUNT_TAGXID, ",tagxid", "" },
+ { 0, NULL, NULL }
+ };
+ struct proc_nfs_info *nfs_infop;
+ struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
+ char buf[12];
+ char *proto;
+
+ seq_printf(m, ",v%d", nfss->rpc_ops->version);
+ seq_printf(m, ",rsize=%d", nfss->rsize);
+ seq_printf(m, ",wsize=%d", nfss->wsize);
+ if (nfss->acregmin != 3*HZ)
+ seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
+ if (nfss->acregmax != 60*HZ)
+ seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
+ if (nfss->acdirmin != 30*HZ)
+ seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
+ if (nfss->acdirmax != 60*HZ)
+ seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
+ for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
+ if (nfss->flags & nfs_infop->flag)
+ seq_puts(m, nfs_infop->str);
+ else
+ seq_puts(m, nfs_infop->nostr);
+ }
+ switch (nfss->client->cl_xprt->prot) {
+ case IPPROTO_TCP:
+ proto = "tcp";
+ break;
+ case IPPROTO_UDP:
+ proto = "udp";
+ break;
+ default:
+ snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
+ proto = buf;
+ }
+ seq_printf(m, ",proto=%s", proto);
+ seq_puts(m, ",addr=");
+ seq_escape(m, nfss->hostname, " \t\n\\");
+ return 0;
+}
+
/**
* nfs_sync_mapping - helper to flush all mmapped dirty data to disk
*/
struct nfs_inode *nfsi = NFS_I(inode);
int mode = inode->i_mode;
- nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
-
NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode);
NFS_ATTRTIMEO_UPDATE(inode) = jiffies;
spin_lock(&inode->i_lock);
nfs_zap_caches_locked(inode);
spin_unlock(&inode->i_lock);
-
- nfs_fscache_zap_fh_cookie(NFS_SERVER(inode), NFS_I(inode));
}
static void nfs_zap_acl_cache(struct inode *inode)
.fh = fh,
.fattr = fattr
};
- struct inode *inode = ERR_PTR(-ENOENT);
+ struct inode *inode = NULL;
unsigned long hash;
- int maycache = 1;
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
goto out_no_inode;
goto out_no_inode;
}
- hash = fattr->fileid;
- if (sizeof(hash) < sizeof(u64))
- hash ^= fattr->fileid >> (sizeof(u64) - sizeof(ino_t)) * 8;
+ hash = nfs_fattr_to_ino_t(fattr);
- inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
- if (inode == NULL) {
- inode = ERR_PTR(-ENOMEM);
+ if (!(inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc)))
goto out_no_inode;
- }
if (inode->i_state & I_NEW) {
struct nfs_inode *nfsi = NFS_I(inode);
- /* We set i_ino for the few things that still rely on it, such
- * as printing messages; stat and filldir use the fileid
- * directly since i_ino may not be large enough */
- inode->i_ino = fattr->fileid;
+ /* We set i_ino for the few things that still rely on it,
+ * such as stat(2) */
+ inode->i_ino = hash;
/* We can't support update_atime(), since the server will reset it */
inode->i_flags |= S_NOATIME|S_NOCMTIME;
/* Why so? Because we want revalidate for devices/FIFOs, and
* that's precisely what we have in nfs_file_inode_operations.
*/
- inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
+ inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops;
if (S_ISREG(inode->i_mode)) {
inode->i_fop = &nfs_file_operations;
inode->i_data.a_ops = &nfs_file_aops;
inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
} else if (S_ISDIR(inode->i_mode)) {
- inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
+ inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops;
inode->i_fop = &nfs_dir_operations;
if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
&& fattr->size <= NFS_LIMIT_READDIRPLUS)
set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
- /* Deal with crossing mountpoints */
- if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
- if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
- inode->i_op = &nfs_referral_inode_operations;
- else
- inode->i_op = &nfs_mountpoint_inode_operations;
- inode->i_fop = NULL;
- maycache = 0;
- }
} else if (S_ISLNK(inode->i_mode))
inode->i_op = &nfs_symlink_inode_operations;
else
* report the blocks in 512byte units
*/
inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
+ inode->i_blksize = inode->i_sb->s_blocksize;
} else {
inode->i_blocks = fattr->du.nfs2.blocks;
+ inode->i_blksize = fattr->du.nfs2.blocksize;
}
nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
nfsi->attrtimeo_timestamp = jiffies;
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
nfsi->cache_access.cred = NULL;
- nfs_fscache_get_fh_cookie(sb, nfsi, maycache);
-
unlock_new_inode(inode);
} else
nfs_refresh_inode(inode, fattr);
return inode;
out_no_inode:
- dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
+ printk("nfs_fhget: iget failed\n");
goto out;
}
struct nfs_fattr fattr;
int error;
- nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
-
if (attr->ia_valid & ATTR_SIZE) {
if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
attr->ia_valid &= ~ATTR_SIZE;
lock_kernel();
nfs_begin_data_update(inode);
- /* Write all dirty data */
- filemap_write_and_wait(inode->i_mapping);
- nfs_wb_all(inode);
+ /* Write all dirty data if we're changing file permissions or size */
+ if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE)) != 0) {
+ filemap_write_and_wait(inode->i_mapping);
+ nfs_wb_all(inode);
+ }
/*
* Return any delegations if we're going to change ACLs
*/
spin_unlock(&inode->i_lock);
}
if ((attr->ia_valid & ATTR_SIZE) != 0) {
- nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
inode->i_size = attr->ia_size;
- nfs_fscache_set_size(NFS_SERVER(inode), NFS_I(inode), inode->i_size);
vmtruncate(inode, attr->ia_size);
}
}
int err;
/* Flush out writes to the server in order to update c/mtime */
- nfs_sync_inode_wait(inode, 0, 0, FLUSH_NOCOMMIT);
+ nfs_sync_inode(inode, 0, 0, FLUSH_WAIT|FLUSH_NOCOMMIT);
/*
* We may force a getattr if the user cares about atime.
err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
else
err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
- if (!err) {
+ if (!err)
generic_fillattr(inode, stat);
- stat->ino = NFS_FILEID(inode);
- }
return err;
}
-static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred)
+struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred)
{
struct nfs_open_context *ctx;
if (ctx != NULL) {
atomic_set(&ctx->count, 1);
ctx->dentry = dget(dentry);
- ctx->vfsmnt = mntget(mnt);
ctx->cred = get_rpccred(cred);
ctx->state = NULL;
ctx->lockowner = current->files;
if (ctx->cred != NULL)
put_rpccred(ctx->cred);
dput(ctx->dentry);
- mntput(ctx->vfsmnt);
kfree(ctx);
}
}
* Ensure that mmap has a recent RPC credential for use when writing out
* shared pages
*/
-static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
+void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
{
struct inode *inode = filp->f_dentry->d_inode;
struct nfs_inode *nfsi = NFS_I(inode);
return ctx;
}
-static void nfs_file_clear_open_context(struct file *filp)
+void nfs_file_clear_open_context(struct file *filp)
{
struct inode *inode = filp->f_dentry->d_inode;
struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data;
cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
if (IS_ERR(cred))
return PTR_ERR(cred);
- ctx = alloc_nfs_open_context(filp->f_vfsmnt, filp->f_dentry, cred);
+ ctx = alloc_nfs_open_context(filp->f_dentry, cred);
put_rpccred(cred);
if (ctx == NULL)
return -ENOMEM;
ctx->mode = filp->f_mode;
nfs_file_set_open_context(filp, ctx);
put_nfs_open_context(ctx);
- if ((filp->f_flags & O_ACCMODE) != O_RDONLY)
- nfs_fscache_disable_fh_cookie(inode);
return 0;
}
dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
- nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
lock_kernel();
if (!inode || is_bad_inode(inode))
goto out_nowait;
status = -ESTALE;
/* Do we trust the cached ESTALE? */
if (NFS_ATTRTIMEO(inode) != 0) {
- if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) {
+ if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) {
/* no */
} else
goto out;
}
spin_unlock(&inode->i_lock);
+ nfs_revalidate_mapping(inode, inode->i_mapping);
+
if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
nfs_zap_acl_cache(inode);
*/
int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
{
- if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
+ if (!(NFS_I(inode)->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))
&& !nfs_attribute_timeout(inode))
return NFS_STALE(inode) ? -ESTALE : 0;
return __nfs_revalidate_inode(server, inode);
* @inode - pointer to host inode
* @mapping - pointer to mapping
*/
-int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
+void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
{
struct nfs_inode *nfsi = NFS_I(inode);
- int ret = 0;
-
- if (NFS_STALE(inode))
- ret = -ESTALE;
- if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
- || nfs_attribute_timeout(inode))
- ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
- nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
if (S_ISREG(inode->i_mode))
nfs_sync_mapping(mapping);
invalidate_inode_pages2(mapping);
}
spin_unlock(&inode->i_lock);
- nfs_fscache_renew_fh_cookie(NFS_SERVER(inode), nfsi);
-
dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
inode->i_sb->s_id,
(long long)NFS_FILEID(inode));
}
- return ret;
}
/**
{
struct nfs_inode *nfsi = NFS_I(inode);
+ if ((fattr->valid & NFS_ATTR_PRE_CHANGE) != 0
+ && nfsi->change_attr == fattr->pre_change_attr) {
+ nfsi->change_attr = fattr->change_attr;
+ nfsi->cache_change_attribute = jiffies;
+ }
+
/* If we have atomic WCC data, we may update some attributes */
if ((fattr->valid & NFS_ATTR_WCC) != 0) {
if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
xid_t xid;
- /* Has the inode gone and changed behind our back? */
- if (nfsi->fileid != fattr->fileid
- || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
- return -EIO;
- }
+ if ((fattr->valid & NFS_ATTR_FATTR) == 0)
+ return 0;
/* Are we in the process of updating data on the server? */
data_unstable = nfs_caches_unstable(inode);
nfs_wcc_update_inode(inode, fattr);
if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
- nfsi->change_attr != fattr->change_attr)
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
+ nfsi->change_attr != fattr->change_attr) {
+ nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ if (!data_unstable)
+ nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
+ }
- /* Verify a few of the more important attributes */
- if (!timespec_equal(&inode->i_mtime, &fattr->mtime))
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
+ /* Has the inode gone and changed behind our back? */
+ if (nfsi->fileid != fattr->fileid
+ || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
+ return -EIO;
+ }
cur_size = i_size_read(inode);
new_isize = nfs_size_to_loff_t(fattr->size);
- if (cur_size != new_isize && nfsi->npages == 0)
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
+
+ /* Verify a few of the more important attributes */
+ if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
+ nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ if (!data_unstable)
+ nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
+ }
+ if (cur_size != new_isize) {
+ nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ if (nfsi->npages == 0)
+ nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
+ }
uid = INOXID_UID(XID_TAG(inode), fattr->uid, fattr->gid);
gid = INOXID_GID(XID_TAG(inode), fattr->uid, fattr->gid);
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
return 0;
spin_lock(&inode->i_lock);
+ nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
if (time_after(fattr->time_start, nfsi->last_updated))
status = nfs_update_inode(inode, fattr);
else
spin_lock(&inode->i_lock);
if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
- nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
+ nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
goto out;
}
status = nfs_update_inode(inode, fattr);
*/
static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
{
- struct nfs_server *server;
struct nfs_inode *nfsi = NFS_I(inode);
loff_t cur_isize, new_isize;
unsigned int invalid = 0;
__FUNCTION__, inode->i_sb->s_id, inode->i_ino,
atomic_read(&inode->i_count), fattr->valid);
+ if ((fattr->valid & NFS_ATTR_FATTR) == 0)
+ return 0;
+
if (nfsi->fileid != fattr->fileid)
goto out_fileid;
if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
goto out_changed;
- server = NFS_SERVER(inode);
- /* Update the fsid if and only if this is the root directory */
- if (inode == inode->i_sb->s_root->d_inode
- && !nfs_fsid_equal(&server->fsid, &fattr->fsid))
- server->fsid = fattr->fsid;
-
/*
* Update the read time so we don't revalidate too often.
*/
/* Are we racing with known updates of the metadata on the server? */
data_stable = nfs_verify_change_attribute(inode, fattr->time_start);
if (data_stable)
- nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME);
+ nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME);
/* Do atomic weak cache consistency updates */
nfs_wcc_update_inode(inode, fattr);
if (data_stable) {
inode->i_size = new_isize;
invalid |= NFS_INO_INVALID_DATA;
- nfs_fscache_set_size(NFS_SERVER(inode), nfsi, inode->i_size);
}
invalid |= NFS_INO_INVALID_ATTR;
} else if (new_isize > cur_isize) {
inode->i_size = new_isize;
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
- nfs_fscache_set_size(NFS_SERVER(inode), nfsi, inode->i_size);
}
nfsi->cache_change_attribute = jiffies;
dprintk("NFS: isize change on server for file %s/%ld\n",
nfsi->cache_change_attribute = jiffies;
}
+ if ((fattr->valid & NFS_ATTR_FATTR_V4)
+ && nfsi->change_attr != fattr->change_attr) {
+ dprintk("NFS: change_attr change on server for file %s/%ld\n",
+ inode->i_sb->s_id, inode->i_ino);
+ nfsi->change_attr = fattr->change_attr;
+ invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+ nfsi->cache_change_attribute = jiffies;
+ }
+
/* If ctime has changed we should definitely clear access+acl caches */
if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
* report the blocks in 512byte units
*/
inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
+ inode->i_blksize = inode->i_sb->s_blocksize;
} else {
inode->i_blocks = fattr->du.nfs2.blocks;
+ inode->i_blksize = fattr->du.nfs2.blocksize;
}
- if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
- nfsi->change_attr != fattr->change_attr) {
- dprintk("NFS: change_attr change on server for file %s/%ld\n",
- inode->i_sb->s_id, inode->i_ino);
- nfsi->change_attr = fattr->change_attr;
- invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
- nfsi->cache_change_attribute = jiffies;
- }
-
/* Update attrtimeo value if we're out of the unstable period */
if (invalid & NFS_INO_INVALID_ATTR) {
- nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
nfsi->attrtimeo_timestamp = jiffies;
} else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) {
out_fileid:
printk(KERN_ERR "NFS: server %s error: fileid changed\n"
"fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
- NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
+ NFS_SERVER(inode)->hostname, inode->i_sb->s_id,
(long long)nfsi->fileid, (long long)fattr->fileid);
goto out_err;
}
+/*
+ * File system information
+ */
+
+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 = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
+ if (!server)
+ goto out_err;
+ memset(server, 0, sizeof(struct nfs_server));
+ /* 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_VERBOSE ? 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 */
+
+ kfree(server->hostname);
+ kfree(server);
+}
+
+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,
+};
#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,
+ .delete_inode = nfs_delete_inode,
+ .statfs = nfs_statfs,
+ .clear_inode = nfs4_clear_inode,
+ .umount_begin = nfs_umount_begin,
+ .show_options = nfs_show_options,
+};
+
/*
* 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().
*/
-void nfs4_clear_inode(struct inode *inode)
+static void nfs4_clear_inode(struct inode *inode)
{
struct nfs_inode *nfsi = NFS_I(inode);
nfs4_close_state(state, state->state);
}
}
+
+
+static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
+{
+ struct nfs_server *server;
+ struct nfs4_client *clp = NULL;
+ struct rpc_xprt *xprt = NULL;
+ struct rpc_clnt *clnt = NULL;
+ 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);
+
+ clp = nfs4_get_client(&server->addr.sin_addr);
+ if (!clp) {
+ dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
+ return -EIO;
+ }
+
+ /* 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;
+ }
+ }
+
+ down_write(&clp->cl_sem);
+ if (IS_ERR(clp->cl_rpcclient)) {
+ xprt = xprt_create_proto(data->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;
+ }
+ clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
+ server->rpc_ops->version, authflavour);
+ 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)) {
+ err = PTR_ERR(clnt);
+ dprintk("%s: cannot create RPC client. Error = %d\n",
+ __FUNCTION__, err);
+ return err;
+ }
+
+ server->client = clnt;
+
+ if (server->nfs4_state->cl_idmap == NULL) {
+ dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
+ return -ENOMEM;
+ }
+
+ if (clnt->cl_auth->au_flavor != authflavour) {
+ struct rpc_auth *auth;
+
+ auth = rpcauth_create(authflavour, clnt);
+ if (IS_ERR(auth)) {
+ dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
+ return PTR_ERR(auth);
+ }
+ }
+
+ sb->s_time_gran = 1;
+
+ sb->s_op = &nfs4_sops;
+ err = nfs_sb_init(sb, authflavour);
+ if (err == 0)
+ return 0;
+out_fail:
+ if (clp)
+ nfs4_put_client(clp);
+ 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 = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+ memset(server, 0, sizeof(struct nfs_server));
+ /* 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_VERBOSE ? 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);
+ rpciod_down(); /* release rpciod */
+
+ destroy_nfsv4_state(server);
+
+ kfree(server->hostname);
+ kfree(server);
+}
+
+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);
+
+#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_init_once(nfsi) \
+ do { } while (0)
+#define register_nfs4fs() (0)
+#define unregister_nfs4fs()
#endif
-struct inode *nfs_alloc_inode(struct super_block *sb)
+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 nfs_inode *nfsi;
nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL);
return &nfsi->vfs_inode;
}
-void nfs_destroy_inode(struct inode *inode)
+static void nfs_destroy_inode(struct inode *inode)
{
kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
}
-static inline void nfs4_init_once(struct nfs_inode *nfsi)
-{
-#ifdef CONFIG_NFS_V4
- INIT_LIST_HEAD(&nfsi->open_states);
- nfsi->delegation = NULL;
- nfsi->delegation_state = 0;
- init_rwsem(&nfsi->rwsem);
-#endif
-}
-
static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
{
struct nfs_inode *nfsi = (struct nfs_inode *) foo;
}
}
-static int __init nfs_init_inodecache(void)
+static int nfs_init_inodecache(void)
{
nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
sizeof(struct nfs_inode),
- 0, (SLAB_RECLAIM_ACCOUNT|
- SLAB_MEM_SPREAD),
+ 0, SLAB_RECLAIM_ACCOUNT,
init_once, NULL);
if (nfs_inode_cachep == NULL)
return -ENOMEM;
{
int err;
- err = nfs_fscache_register();
- if (err < 0)
- goto out6;
-
- err = nfs_fs_proc_init();
- if (err)
- goto out5;
-
err = nfs_init_nfspagecache();
if (err)
goto out4;
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
- if ((err = register_nfs_fs()) != 0)
+ err = register_filesystem(&nfs_fs_type);
+ if (err)
+ goto out;
+ if ((err = register_nfs4fs()) != 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();
out3:
nfs_destroy_nfspagecache();
out4:
- nfs_fs_proc_exit();
-out5:
- nfs_fscache_unregister();
-out6:
return err;
}
static void __exit exit_nfs_fs(void)
{
+#ifdef CONFIG_NFS_DIRECTIO
nfs_destroy_directcache();
+#endif
nfs_destroy_writepagecache();
nfs_destroy_readpagecache();
nfs_destroy_inodecache();
nfs_destroy_nfspagecache();
- nfs_fscache_unregister();
#ifdef CONFIG_PROC_FS
rpc_proc_unregister("nfs");
#endif
- unregister_nfs_fs();
- nfs_fs_proc_exit();
+ unregister_filesystem(&nfs_fs_type);
+ unregister_nfs4fs();
}
/* Not quite true; I just maintain it */
git://git.onelab.eu / linux-2.6.git / blobdiff