X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=fs%2Fnfs%2Fdelegation.c;h=841c99a9b11c84203cb5afbcb9d69f38f3682319;hb=refs%2Fheads%2Fvserver;hp=5b9c60f97791c133bb6bfbbd8e680dfec8319fd4;hpb=a2c21200f1c81b08cb55e417b68150bba439b646;p=linux-2.6.git diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 5b9c60f97..841c99a9b 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -6,8 +6,8 @@ * NFS file delegation management * */ -#include #include +#include #include #include #include @@ -16,12 +16,9 @@ #include #include +#include "nfs4_fs.h" #include "delegation.h" - -static struct nfs_delegation *nfs_alloc_delegation(void) -{ - return (struct nfs_delegation *)kmalloc(sizeof(struct nfs_delegation), GFP_KERNEL); -} +#include "internal.h" static void nfs_free_delegation(struct nfs_delegation *delegation) { @@ -30,11 +27,42 @@ static void nfs_free_delegation(struct nfs_delegation *delegation) kfree(delegation); } +static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state) +{ + struct inode *inode = state->inode; + struct file_lock *fl; + int status; + + for (fl = inode->i_flock; fl != 0; fl = fl->fl_next) { + if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) + continue; + if ((struct nfs_open_context *)fl->fl_file->private_data != ctx) + continue; + status = nfs4_lock_delegation_recall(state, fl); + if (status >= 0) + continue; + switch (status) { + default: + printk(KERN_ERR "%s: unhandled error %d.\n", + __FUNCTION__, status); + case -NFS4ERR_EXPIRED: + /* kill_proc(fl->fl_pid, SIGLOST, 1); */ + case -NFS4ERR_STALE_CLIENTID: + nfs4_schedule_state_recovery(NFS_SERVER(inode)->nfs_client); + goto out_err; + } + } + return 0; +out_err: + return status; +} + static void nfs_delegation_claim_opens(struct inode *inode) { struct nfs_inode *nfsi = NFS_I(inode); struct nfs_open_context *ctx; struct nfs4_state *state; + int err; again: spin_lock(&inode->i_lock); @@ -46,9 +74,12 @@ again: continue; get_nfs_open_context(ctx); spin_unlock(&inode->i_lock); - if (nfs4_open_delegation_recall(ctx->dentry, state) < 0) - return; + err = nfs4_open_delegation_recall(ctx->dentry, state); + if (err >= 0) + err = nfs_delegation_claim_locks(ctx, state); put_nfs_open_context(ctx); + if (err != 0) + return; goto again; } spin_unlock(&inode->i_lock); @@ -79,18 +110,23 @@ void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, st */ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res) { - struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state; + struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation; int status = 0; - delegation = nfs_alloc_delegation(); + /* Ensure we first revalidate the attributes and page cache! */ + if ((nfsi->cache_validity & (NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATTR))) + __nfs_revalidate_inode(NFS_SERVER(inode), inode); + + delegation = kmalloc(sizeof(*delegation), GFP_KERNEL); if (delegation == NULL) return -ENOMEM; memcpy(delegation->stateid.data, res->delegation.data, sizeof(delegation->stateid.data)); delegation->type = res->delegation_type; delegation->maxsize = res->maxsize; + delegation->change_attr = nfsi->change_attr; delegation->cred = get_rpccred(cred); delegation->inode = inode; @@ -105,13 +141,12 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct sizeof(delegation->stateid)) != 0 || delegation->type != nfsi->delegation->type) { printk("%s: server %u.%u.%u.%u, handed out a duplicate delegation!\n", - __FUNCTION__, NIPQUAD(clp->cl_addr)); + __FUNCTION__, NIPQUAD(clp->cl_addr.sin_addr)); status = -EIO; } } spin_unlock(&clp->cl_lock); - if (delegation != NULL) - kfree(delegation); + kfree(delegation); return status; } @@ -119,8 +154,6 @@ static int nfs_do_return_delegation(struct inode *inode, struct nfs_delegation * { int res = 0; - __nfs_revalidate_inode(NFS_SERVER(inode), inode); - res = nfs4_proc_delegreturn(inode, delegation->cred, &delegation->stateid); nfs_free_delegation(delegation); return res; @@ -137,9 +170,9 @@ static void nfs_msync_inode(struct inode *inode) /* * Basic procedure for returning a delegation to the server */ -int nfs_inode_return_delegation(struct inode *inode) +int __nfs_inode_return_delegation(struct inode *inode) { - struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state; + struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation; int res = 0; @@ -171,7 +204,7 @@ int nfs_inode_return_delegation(struct inode *inode) */ void nfs_return_all_delegations(struct super_block *sb) { - struct nfs4_client *clp = NFS_SB(sb)->nfs4_state; + struct nfs_client *clp = NFS_SB(sb)->nfs_client; struct nfs_delegation *delegation; struct inode *inode; @@ -193,10 +226,53 @@ restart: spin_unlock(&clp->cl_lock); } +int nfs_do_expire_all_delegations(void *ptr) +{ + struct nfs_client *clp = ptr; + struct nfs_delegation *delegation; + struct inode *inode; + + allow_signal(SIGKILL); +restart: + spin_lock(&clp->cl_lock); + if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) != 0) + goto out; + if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) + goto out; + list_for_each_entry(delegation, &clp->cl_delegations, super_list) { + inode = igrab(delegation->inode); + if (inode == NULL) + continue; + spin_unlock(&clp->cl_lock); + nfs_inode_return_delegation(inode); + iput(inode); + goto restart; + } +out: + spin_unlock(&clp->cl_lock); + nfs_put_client(clp); + module_put_and_exit(0); +} + +void nfs_expire_all_delegations(struct nfs_client *clp) +{ + struct task_struct *task; + + __module_get(THIS_MODULE); + atomic_inc(&clp->cl_count); + task = kthread_run(nfs_do_expire_all_delegations, clp, + "%u.%u.%u.%u-delegreturn", + NIPQUAD(clp->cl_addr.sin_addr)); + if (!IS_ERR(task)) + return; + nfs_put_client(clp); + module_put(THIS_MODULE); +} + /* * Return all delegations following an NFS4ERR_CB_PATH_DOWN error. */ -void nfs_handle_cb_pathdown(struct nfs4_client *clp) +void nfs_handle_cb_pathdown(struct nfs_client *clp) { struct nfs_delegation *delegation; struct inode *inode; @@ -219,7 +295,7 @@ restart: struct recall_threadargs { struct inode *inode; - struct nfs4_client *clp; + struct nfs_client *clp; const nfs4_stateid *stateid; struct completion started; @@ -230,7 +306,7 @@ static int recall_thread(void *data) { struct recall_threadargs *args = (struct recall_threadargs *)data; struct inode *inode = igrab(args->inode); - struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state; + struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation; @@ -291,7 +367,7 @@ out_module_put: /* * Retrieve the inode associated with a delegation */ -struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nfs_fh *fhandle) +struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle) { struct nfs_delegation *delegation; struct inode *res = NULL; @@ -309,7 +385,7 @@ struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nf /* * Mark all delegations as needing to be reclaimed */ -void nfs_delegation_mark_reclaim(struct nfs4_client *clp) +void nfs_delegation_mark_reclaim(struct nfs_client *clp) { struct nfs_delegation *delegation; spin_lock(&clp->cl_lock); @@ -321,7 +397,7 @@ void nfs_delegation_mark_reclaim(struct nfs4_client *clp) /* * Reap all unclaimed delegations after reboot recovery is done */ -void nfs_delegation_reap_unclaimed(struct nfs4_client *clp) +void nfs_delegation_reap_unclaimed(struct nfs_client *clp) { struct nfs_delegation *delegation, *n; LIST_HEAD(head); @@ -340,3 +416,22 @@ void nfs_delegation_reap_unclaimed(struct nfs4_client *clp) nfs_free_delegation(delegation); } } + +int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode) +{ + struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; + struct nfs_inode *nfsi = NFS_I(inode); + struct nfs_delegation *delegation; + int res = 0; + + if (nfsi->delegation_state == 0) + return 0; + spin_lock(&clp->cl_lock); + delegation = nfsi->delegation; + if (delegation != NULL) { + memcpy(dst->data, delegation->stateid.data, sizeof(dst->data)); + res = 1; + } + spin_unlock(&clp->cl_lock); + return res; +}