From 77041ed9b49a9e10f374bfa6e482d30ee7a3d46e Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Thu, 1 Jul 2010 12:49:11 -0400 Subject: [PATCH] NFSv4: Ensure the lockowners are labelled using the fl_owner and/or fl_pid flock locks want to be labelled using the process pid, while posix locks want to be labelled using the fl_owner. Signed-off-by: Trond Myklebust --- fs/nfs/nfs4_fs.h | 15 +++++++++++++-- fs/nfs/nfs4proc.c | 2 +- fs/nfs/nfs4state.c | 45 +++++++++++++++++++++++++++++++++++---------- fs/nfs/nfs4xdr.c | 2 +- 4 files changed, 50 insertions(+), 14 deletions(-) diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index deaf37f5a7a9..311e15cc8af0 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -142,10 +142,20 @@ enum { * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN) */ +struct nfs4_lock_owner { + unsigned int lo_type; +#define NFS4_ANY_LOCK_TYPE (0U) +#define NFS4_FLOCK_LOCK_TYPE (1U << 0) +#define NFS4_POSIX_LOCK_TYPE (1U << 1) + union { + fl_owner_t posix_owner; + pid_t flock_owner; + } lo_u; +}; + struct nfs4_lock_state { struct list_head ls_locks; /* Other lock stateids */ struct nfs4_state * ls_state; /* Pointer to open state */ - fl_owner_t ls_owner; /* POSIX lock owner */ #define NFS_LOCK_INITIALIZED 1 int ls_flags; struct nfs_seqid_counter ls_seqid; @@ -153,6 +163,7 @@ struct nfs4_lock_state { struct nfs_unique_id ls_id; nfs4_stateid ls_stateid; atomic_t ls_count; + struct nfs4_lock_owner ls_owner; }; /* bits for nfs4_state->flags */ @@ -310,7 +321,7 @@ extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) extern void nfs41_handle_recall_slot(struct nfs_client *clp); extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp); extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl); -extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t); +extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t, pid_t); extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask); extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task); diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 5d3e8a2db99f..d6413b48b057 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1767,7 +1767,7 @@ static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { /* Use that stateid */ } else if (state != NULL) { - nfs4_copy_stateid(&arg.stateid, state, current->files); + nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid); } else memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 13a4f27e7271..3e2f19b04c06 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -602,12 +602,21 @@ void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode) * that is compatible with current->files */ static struct nfs4_lock_state * -__nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) +__nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) { struct nfs4_lock_state *pos; list_for_each_entry(pos, &state->lock_states, ls_locks) { - if (pos->ls_owner != fl_owner) + if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) continue; + switch (pos->ls_owner.lo_type) { + case NFS4_POSIX_LOCK_TYPE: + if (pos->ls_owner.lo_u.posix_owner != fl_owner) + continue; + break; + case NFS4_FLOCK_LOCK_TYPE: + if (pos->ls_owner.lo_u.flock_owner != fl_pid) + continue; + } atomic_inc(&pos->ls_count); return pos; } @@ -619,7 +628,7 @@ __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) * exists, return an uninitialized one. * */ -static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) +static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) { struct nfs4_lock_state *lsp; struct nfs_client *clp = state->owner->so_server->nfs_client; @@ -633,7 +642,18 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f lsp->ls_seqid.sequence = &lsp->ls_sequence; atomic_set(&lsp->ls_count, 1); lsp->ls_state = state; - lsp->ls_owner = fl_owner; + lsp->ls_owner.lo_type = type; + switch (lsp->ls_owner.lo_type) { + case NFS4_FLOCK_LOCK_TYPE: + lsp->ls_owner.lo_u.flock_owner = fl_pid; + break; + case NFS4_POSIX_LOCK_TYPE: + lsp->ls_owner.lo_u.posix_owner = fl_owner; + break; + default: + kfree(lsp); + return NULL; + } spin_lock(&clp->cl_lock); nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); spin_unlock(&clp->cl_lock); @@ -657,13 +677,13 @@ static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) * exists, return an uninitialized one. * */ -static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) +static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) { struct nfs4_lock_state *lsp, *new = NULL; for(;;) { spin_lock(&state->state_lock); - lsp = __nfs4_find_lock_state(state, owner); + lsp = __nfs4_find_lock_state(state, owner, pid, type); if (lsp != NULL) break; if (new != NULL) { @@ -674,7 +694,7 @@ static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_ break; } spin_unlock(&state->state_lock); - new = nfs4_alloc_lock_state(state, owner); + new = nfs4_alloc_lock_state(state, owner, pid, type); if (new == NULL) return NULL; } @@ -730,7 +750,12 @@ int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) if (fl->fl_ops != NULL) return 0; - lsp = nfs4_get_lock_state(state, fl->fl_owner); + if (fl->fl_flags & FL_POSIX) + lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); + else if (fl->fl_flags & FL_FLOCK) + lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE); + else + return -EINVAL; if (lsp == NULL) return -ENOMEM; fl->fl_u.nfs4_fl.owner = lsp; @@ -742,7 +767,7 @@ int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) * Byte-range lock aware utility to initialize the stateid of read/write * requests. */ -void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner) +void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid) { struct nfs4_lock_state *lsp; int seq; @@ -755,7 +780,7 @@ void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t f return; spin_lock(&state->state_lock); - lsp = __nfs4_find_lock_state(state, fl_owner); + lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); spin_unlock(&state->state_lock); diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 15185c2abd11..257c1811feb4 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -1361,7 +1361,7 @@ static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context p = reserve_space(xdr, NFS4_STATEID_SIZE); if (ctx->state != NULL) { - nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner); + nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid); xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE); } else xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE); -- 2.30.2