From 5263e31e452fb84138b9bee061d5c06c0f359fea Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 16 Jan 2015 15:05:55 -0500 Subject: locks: move flock locks to file_lock_context Signed-off-by: Jeff Layton Acked-by: Christoph Hellwig --- fs/nfs/delegation.c | 19 +++++++++++++++++-- fs/nfs/nfs4state.c | 42 ++++++++++++++++++++++++++++++++++++++++-- fs/nfs/pagelist.c | 6 ++++++ fs/nfs/write.c | 43 ++++++++++++++++++++++++++++++++++++++----- 4 files changed, 101 insertions(+), 9 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 7f3f60641344..9f9f67b17e2b 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -85,15 +85,16 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_ { struct inode *inode = state->inode; struct file_lock *fl; + struct file_lock_context *flctx; int status = 0; - if (inode->i_flock == NULL) + if (inode->i_flock == NULL && inode->i_flctx == NULL) goto out; /* Protect inode->i_flock using the i_lock */ spin_lock(&inode->i_lock); for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { - if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) + if (!(fl->fl_flags & (FL_POSIX))) continue; if (nfs_file_open_context(fl->fl_file) != ctx) continue; @@ -103,6 +104,20 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_ goto out; spin_lock(&inode->i_lock); } + + flctx = inode->i_flctx; + if (flctx) { + list_for_each_entry(fl, &flctx->flc_flock, fl_list) { + if (nfs_file_open_context(fl->fl_file) != ctx) + continue; + spin_unlock(&inode->i_lock); + status = nfs4_lock_delegation_recall(fl, state, + stateid); + if (status < 0) + goto out; + spin_lock(&inode->i_lock); + } + } spin_unlock(&inode->i_lock); out: return status; diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 5194933ed419..65c404bf61ae 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -1366,8 +1366,9 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_ struct nfs_inode *nfsi = NFS_I(inode); struct file_lock *fl; int status = 0; + struct file_lock_context *flctx = inode->i_flctx; - if (inode->i_flock == NULL) + if (inode->i_flock == NULL && flctx == NULL) return 0; /* Guard against delegation returns and new lock/unlock calls */ @@ -1375,7 +1376,7 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_ /* Protect inode->i_flock using the BKL */ spin_lock(&inode->i_lock); for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { - if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) + if (!(fl->fl_flags & FL_POSIX)) continue; if (nfs_file_open_context(fl->fl_file)->state != state) continue; @@ -1408,6 +1409,43 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_ } spin_lock(&inode->i_lock); } + + if (!flctx) + goto out_unlock; + + list_for_each_entry(fl, &flctx->flc_flock, fl_list) { + if (nfs_file_open_context(fl->fl_file)->state != state) + continue; + spin_unlock(&inode->i_lock); + status = ops->recover_lock(state, fl); + switch (status) { + case 0: + break; + case -ESTALE: + case -NFS4ERR_ADMIN_REVOKED: + case -NFS4ERR_STALE_STATEID: + case -NFS4ERR_BAD_STATEID: + case -NFS4ERR_EXPIRED: + case -NFS4ERR_NO_GRACE: + case -NFS4ERR_STALE_CLIENTID: + case -NFS4ERR_BADSESSION: + case -NFS4ERR_BADSLOT: + case -NFS4ERR_BAD_HIGH_SLOT: + case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: + goto out; + default: + pr_err("NFS: %s: unhandled error %d\n", + __func__, status); + case -ENOMEM: + case -NFS4ERR_DENIED: + case -NFS4ERR_RECLAIM_BAD: + case -NFS4ERR_RECLAIM_CONFLICT: + /* kill_proc(fl->fl_pid, SIGLOST, 1); */ + status = 0; + } + spin_lock(&inode->i_lock); + } +out_unlock: spin_unlock(&inode->i_lock); out: up_write(&nfsi->rwsem); diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 2b5e769beb16..a3b62e15b444 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -826,6 +826,7 @@ static bool nfs_can_coalesce_requests(struct nfs_page *prev, struct nfs_pageio_descriptor *pgio) { size_t size; + struct file_lock_context *flctx; if (prev) { if (!nfs_match_open_context(req->wb_context, prev->wb_context)) @@ -834,6 +835,11 @@ static bool nfs_can_coalesce_requests(struct nfs_page *prev, !nfs_match_lock_context(req->wb_lock_context, prev->wb_lock_context)) return false; + flctx = req->wb_context->dentry->d_inode->i_flctx; + if (flctx != NULL && !list_empty_careful(&flctx->flc_flock) && + !nfs_match_lock_context(req->wb_lock_context, + prev->wb_lock_context)) + return false; if (req_offset(req) != req_offset(prev) + prev->wb_bytes) return false; if (req->wb_page == prev->wb_page) { diff --git a/fs/nfs/write.c b/fs/nfs/write.c index af3af685a9e3..e072aeb34195 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1113,6 +1113,11 @@ int nfs_flush_incompatible(struct file *file, struct page *page) do_flush |= l_ctx->lockowner.l_owner != current->files || l_ctx->lockowner.l_pid != current->tgid; } + if (l_ctx && ctx->dentry->d_inode->i_flctx && + !list_empty_careful(&ctx->dentry->d_inode->i_flctx->flc_flock)) { + do_flush |= l_ctx->lockowner.l_owner != current->files + || l_ctx->lockowner.l_pid != current->tgid; + } nfs_release_request(req); if (!do_flush) return 0; @@ -1170,6 +1175,13 @@ out: return PageUptodate(page) != 0; } +static bool +is_whole_file_wrlock(struct file_lock *fl) +{ + return fl->fl_start == 0 && fl->fl_end == OFFSET_MAX && + fl->fl_type == F_WRLCK; +} + /* If we know the page is up to date, and we're not using byte range locks (or * if we have the whole file locked for writing), it may be more efficient to * extend the write to cover the entire page in order to avoid fragmentation @@ -1180,17 +1192,38 @@ out: */ static int nfs_can_extend_write(struct file *file, struct page *page, struct inode *inode) { + int ret; + struct file_lock_context *flctx = inode->i_flctx; + struct file_lock *fl; + if (file->f_flags & O_DSYNC) return 0; if (!nfs_write_pageuptodate(page, inode)) return 0; if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) return 1; - if (inode->i_flock == NULL || (inode->i_flock->fl_start == 0 && - inode->i_flock->fl_end == OFFSET_MAX && - inode->i_flock->fl_type != F_RDLCK)) - return 1; - return 0; + if (!inode->i_flock && !flctx) + return 0; + + /* Check to see if there are whole file write locks */ + spin_lock(&inode->i_lock); + ret = 0; + + fl = inode->i_flock; + if (fl && is_whole_file_wrlock(fl)) { + ret = 1; + goto out; + } + + if (!list_empty(&flctx->flc_flock)) { + fl = list_first_entry(&flctx->flc_flock, struct file_lock, + fl_list); + if (fl->fl_type == F_WRLCK) + ret = 1; + } +out: + spin_unlock(&inode->i_lock); + return ret; } /* -- cgit v1.2.1