#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
+#include <linux/file.h>
#include <linux/mount.h>
#include <linux/workqueue.h>
#include <linux/smp_lock.h>
static time_t user_lease_time = 90;
static time_t boot_time;
static int in_grace = 1;
-static u32 current_clientid = 1;
static u32 current_ownerid = 1;
static u32 current_fileid = 1;
static u32 current_delegid = 1;
* This type of memory management is somewhat inefficient, but we use it
* anyway since SETCLIENTID is not a common operation.
*/
-static inline struct nfs4_client *
-alloc_client(struct xdr_netobj name)
+static struct nfs4_client *alloc_client(struct xdr_netobj name)
{
struct nfs4_client *clp;
- if ((clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
- if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
- memcpy(clp->cl_name.data, name.data, name.len);
- clp->cl_name.len = name.len;
- }
- else {
- kfree(clp);
- clp = NULL;
- }
+ clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
+ if (clp == NULL)
+ return NULL;
+ clp->cl_name.data = kmalloc(name.len, GFP_KERNEL);
+ if (clp->cl_name.data == NULL) {
+ kfree(clp);
+ return NULL;
}
+ memcpy(clp->cl_name.data, name.data, name.len);
+ clp->cl_name.len = name.len;
return clp;
}
{
struct rpc_clnt *clnt = clp->cl_callback.cb_client;
- /* shutdown rpc client, ending any outstanding recall rpcs */
if (clnt) {
+ /*
+ * Callback threads take a reference on the client, so there
+ * should be no outstanding callbacks at this point.
+ */
clp->cl_callback.cb_client = NULL;
rpc_shutdown_client(clnt);
}
put_nfs4_client(clp);
}
-static struct nfs4_client *
-create_client(struct xdr_netobj name, char *recdir) {
+static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir)
+{
struct nfs4_client *clp;
- if (!(clp = alloc_client(name)))
- goto out;
+ clp = alloc_client(name);
+ if (clp == NULL)
+ return NULL;
memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
atomic_set(&clp->cl_count, 1);
atomic_set(&clp->cl_callback.cb_set, 0);
INIT_LIST_HEAD(&clp->cl_openowners);
INIT_LIST_HEAD(&clp->cl_delegations);
INIT_LIST_HEAD(&clp->cl_lru);
-out:
return clp;
}
-static void
-copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
- memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
+static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
+{
+ memcpy(target->cl_verifier.data, source->data,
+ sizeof(target->cl_verifier.data));
}
-static void
-copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
+static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
+{
target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
target->cl_clientid.cl_id = source->cl_clientid.cl_id;
}
-static void
-copy_cred(struct svc_cred *target, struct svc_cred *source) {
-
+static void copy_cred(struct svc_cred *target, struct svc_cred *source)
+{
target->cr_uid = source->cr_uid;
target->cr_gid = source->cr_gid;
target->cr_group_info = source->cr_group_info;
get_group_info(target->cr_group_info);
}
-static inline int
-same_name(const char *n1, const char *n2)
+static int same_name(const char *n1, const char *n2)
{
return 0 == memcmp(n1, n2, HEXDIR_LEN);
}
return cr1->cr_uid == cr2->cr_uid;
}
-static void
-gen_clid(struct nfs4_client *clp) {
+static void gen_clid(struct nfs4_client *clp)
+{
+ static u32 current_clientid = 1;
+
clp->cl_clientid.cl_boot = boot_time;
clp->cl_clientid.cl_id = current_clientid++;
}
-static void
-gen_confirm(struct nfs4_client *clp) {
- struct timespec tv;
- u32 * p;
+static void gen_confirm(struct nfs4_client *clp)
+{
+ static u32 i;
+ u32 *p;
- tv = CURRENT_TIME;
p = (u32 *)clp->cl_confirm.data;
- *p++ = tv.tv_sec;
- *p++ = tv.tv_nsec;
+ *p++ = get_seconds();
+ *p++ = i++;
}
-static int
-check_name(struct xdr_netobj name) {
-
+static int check_name(struct xdr_netobj name)
+{
if (name.len == 0)
return 0;
if (name.len > NFS4_OPAQUE_LIMIT) {
* SETCLIENTID_CONFIRM request processing consisting
* of 4 bullet points, labeled as CASE1 - CASE4 below.
*/
- if ((conf && unconf) &&
- (same_verf(&unconf->cl_confirm, &confirm)) &&
- (same_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
- (same_name(conf->cl_recdir,unconf->cl_recdir)) &&
- (!same_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
+ if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) {
/*
* RFC 3530 14.2.34 CASE 1:
* callback update
status = nfs_ok;
}
- } else if ((conf && !unconf) ||
- ((conf && unconf) &&
- (!same_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
- !same_name(conf->cl_recdir, unconf->cl_recdir)))) {
+ } else if (conf && !unconf) {
/*
* RFC 3530 14.2.34 CASE 2:
* probable retransmitted request; play it safe and
return NULL;
}
-static int access_valid(u32 x)
+static inline int access_valid(u32 x)
{
- return (x > 0 && x < 4);
+ if (x < NFS4_SHARE_ACCESS_READ)
+ return 0;
+ if (x > NFS4_SHARE_ACCESS_BOTH)
+ return 0;
+ return 1;
}
-static int deny_valid(u32 x)
+static inline int deny_valid(u32 x)
{
- return (x >= 0 && x < 5);
+ /* Note: unlike access bits, deny bits may be zero. */
+ return x <= NFS4_SHARE_DENY_BOTH;
}
+/*
+ * We store the NONE, READ, WRITE, and BOTH bits separately in the
+ * st_{access,deny}_bmap field of the stateid, in order to track not
+ * only what share bits are currently in force, but also what
+ * combinations of share bits previous opens have used. This allows us
+ * to enforce the recommendation of rfc 3530 14.2.19 that the server
+ * return an error if the client attempt to downgrade to a combination
+ * of share bits not explicable by closing some of its previous opens.
+ *
+ * XXX: This enforcement is actually incomplete, since we don't keep
+ * track of access/deny bit combinations; so, e.g., we allow:
+ *
+ * OPEN allow read, deny write
+ * OPEN allow both, deny none
+ * DOWNGRADE allow read, deny none
+ *
+ * which we should reject.
+ */
static void
set_access(unsigned int *access, unsigned long bmap) {
int i;
nfs4_file_downgrade(struct file *filp, unsigned int share_access)
{
if (share_access & NFS4_SHARE_ACCESS_WRITE) {
- put_write_access(filp->f_path.dentry->d_inode);
+ drop_file_write_access(filp);
filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
}
}
int err = get_write_access(inode);
if (err)
return nfserrno(err);
+ err = mnt_want_write(cur_fh->fh_export->ex_path.mnt);
+ if (err)
+ return nfserrno(err);
+ file_take_write(filp);
}
status = nfsd4_truncate(rqstp, cur_fh, open);
if (status) {
}
/* remember the open */
filp->f_mode |= open->op_share_access;
- set_bit(open->op_share_access, &stp->st_access_bmap);
- set_bit(open->op_share_deny, &stp->st_deny_bmap);
+ __set_bit(open->op_share_access, &stp->st_access_bmap);
+ __set_bit(open->op_share_deny, &stp->st_deny_bmap);
return nfs_ok;
}
locks_init_lock(&fl);
fl.fl_lmops = &nfsd_lease_mng_ops;
fl.fl_flags = FL_LEASE;
+ fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
fl.fl_end = OFFSET_MAX;
fl.fl_owner = (fl_owner_t)dp;
fl.fl_file = stp->st_vfs_file;
/* vfs_setlease checks to see if delegation should be handed out.
* the lock_manager callbacks fl_mylease and fl_change are used
*/
- if ((status = vfs_setlease(stp->st_vfs_file,
- flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
+ if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) {
dprintk("NFSD: setlease failed [%d], no delegation\n", status);
unhash_delegation(dp);
flag = NFS4_OPEN_DELEGATE_NONE;
/* Stateid was not found, this is a new OPEN */
int flags = 0;
if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
- flags |= MAY_READ;
+ flags |= NFSD_MAY_READ;
if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
- flags |= MAY_WRITE;
+ flags |= NFSD_MAY_WRITE;
status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
if (status)
goto out;
return status;
}
-static struct workqueue_struct *laundry_wq;
-static void laundromat_main(struct work_struct *);
-static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
-
__be32
nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
clientid_t *clid)
return clientid_val;
}
-void
+static struct workqueue_struct *laundry_wq;
+static void laundromat_main(struct work_struct *);
+static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
+
+static void
laundromat_main(struct work_struct *not_used)
{
time_t t;
&& mandatory_lock(inode);
}
+static int check_stateid_generation(stateid_t *in, stateid_t *ref)
+{
+ /* If the client sends us a stateid from the future, it's buggy: */
+ if (in->si_generation > ref->si_generation)
+ return nfserr_bad_stateid;
+ /*
+ * The following, however, can happen. For example, if the
+ * client sends an open and some IO at the same time, the open
+ * may bump si_generation while the IO is still in flight.
+ * Thanks to hard links and renames, the client never knows what
+ * file an open will affect. So it could avoid that situation
+ * only by serializing all opens and IO from the same open
+ * owner. To recover from the old_stateid error, the client
+ * will just have to retry the IO:
+ */
+ if (in->si_generation < ref->si_generation)
+ return nfserr_old_stateid;
+ return nfs_ok;
+}
+
/*
* Checks for stateid operations
*/
goto out;
stidp = &stp->st_stateid;
}
- if (stateid->si_generation > stidp->si_generation)
- goto out;
-
- /* OLD STATEID */
- status = nfserr_old_stateid;
- if (stateid->si_generation < stidp->si_generation)
+ status = check_stateid_generation(stateid, stidp);
+ if (status)
goto out;
if (stp) {
if ((status = nfs4_check_openmode(stp,flags)))
renew_client(stp->st_stateowner->so_client);
if (filpp)
*filpp = stp->st_vfs_file;
- } else if (dp) {
+ } else {
if ((status = nfs4_check_delegmode(dp, flags)))
goto out;
renew_client(dp->dl_client);
{
struct nfs4_stateid *stp;
struct nfs4_stateowner *sop;
+ __be32 status;
dprintk("NFSD: preprocess_seqid_op: seqid=%d "
"stateid = (%08x/%08x/%08x/%08x)\n", seqid,
goto check_replay;
}
+ *stpp = stp;
+ *sopp = sop = stp->st_stateowner;
+
if (lock) {
- struct nfs4_stateowner *sop = stp->st_stateowner;
clientid_t *lockclid = &lock->v.new.clientid;
struct nfs4_client *clp = sop->so_client;
int lkflg = 0;
}
}
- if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
+ if (nfs4_check_fh(current_fh, stp)) {
dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
return nfserr_bad_stateid;
}
- *stpp = stp;
- *sopp = sop = stp->st_stateowner;
-
/*
* We now validate the seqid and stateid generation numbers.
* For the moment, we ignore the possibility of
" confirmed yet!\n");
return nfserr_bad_stateid;
}
- if (stateid->si_generation > stp->st_stateid.si_generation) {
- dprintk("NFSD: preprocess_seqid_op: future stateid?!\n");
- return nfserr_bad_stateid;
- }
-
- if (stateid->si_generation < stp->st_stateid.si_generation) {
- dprintk("NFSD: preprocess_seqid_op: old stateid!\n");
- return nfserr_old_stateid;
- }
+ status = check_stateid_generation(stateid, &stp->st_stateid);
+ if (status)
+ return status;
renew_client(sop->so_client);
return nfs_ok;
if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
oc->oc_seqid, &oc->oc_req_stateid,
- CHECK_FH | CONFIRM | OPEN_STATE,
+ CONFIRM | OPEN_STATE,
&oc->oc_stateowner, &stp, NULL)))
goto out;
if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
od->od_seqid,
&od->od_stateid,
- CHECK_FH | OPEN_STATE,
+ OPEN_STATE,
&od->od_stateowner, &stp, NULL)))
goto out;
if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
close->cl_seqid,
&close->cl_stateid,
- CHECK_FH | OPEN_STATE | CLOSE_STATE,
+ OPEN_STATE | CLOSE_STATE,
&close->cl_stateowner, &stp, NULL)))
goto out;
status = nfs_ok;
return nfserr_inval;
if ((status = fh_verify(rqstp, &cstate->current_fh,
- S_IFREG, MAY_LOCK))) {
+ S_IFREG, NFSD_MAY_LOCK))) {
dprintk("NFSD: nfsd4_lock: permission denied!\n");
return status;
}
status = nfs4_preprocess_seqid_op(&cstate->current_fh,
lock->lk_new_open_seqid,
&lock->lk_new_open_stateid,
- CHECK_FH | OPEN_STATE,
+ OPEN_STATE,
&lock->lk_replay_owner, &open_stp,
lock);
if (status)
status = nfs4_preprocess_seqid_op(&cstate->current_fh,
lock->lk_old_lock_seqid,
&lock->lk_old_lock_stateid,
- CHECK_FH | LOCK_STATE,
+ LOCK_STATE,
&lock->lk_replay_owner, &lock_stp, lock);
if (status)
goto out;
* Note: locks.c uses the BKL to protect the inode's lock list.
*/
- /* XXX?: Just to divert the locks_release_private at the start of
- * locks_copy_lock: */
- locks_init_lock(&conflock);
err = vfs_lock_file(filp, cmd, &file_lock, &conflock);
switch (-err) {
case 0: /* success! */
if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
locku->lu_seqid,
&locku->lu_stateid,
- CHECK_FH | LOCK_STATE,
+ LOCK_STATE,
&locku->lu_stateowner, &stp, NULL)))
goto out;
nfs4_unlock_state();
}
+/*
+ * user_recovery_dirname is protected by the nfsd_mutex since it's only
+ * accessed when nfsd is starting.
+ */
static void
nfs4_set_recdir(char *recdir)
{
- nfs4_lock_state();
strcpy(user_recovery_dirname, recdir);
- nfs4_unlock_state();
}
/*
if (status)
return status;
status = -ENOTDIR;
- if (S_ISDIR(nd.dentry->d_inode->i_mode)) {
+ if (S_ISDIR(nd.path.dentry->d_inode->i_mode)) {
nfs4_set_recdir(recdir);
status = 0;
}
- path_release(&nd);
+ path_put(&nd.path);
return status;
}
+char *
+nfs4_recoverydir(void)
+{
+ return user_recovery_dirname;
+}
+
/*
* Called when leasetime is changed.
*
* we start to register any changes in lease time. If the administrator
* really wants to change the lease time *now*, they can go ahead and bring
* nfsd down and then back up again after changing the lease time.
+ *
+ * user_lease_time is protected by nfsd_mutex since it's only really accessed
+ * when nfsd is starting
*/
void
nfs4_reset_lease(time_t leasetime)
{
- lock_kernel();
user_lease_time = leasetime;
- unlock_kernel();
}
projects / linux-2.6-omap-h63xx.git / blobdiff