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| author | Meelap Shah <meelap@umich.edu> | 2007-07-17 04:04:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-17 10:23:07 -0700 |
| commit | 47f9940c55c0bdc65188749cae4e841601f513bb (patch) | |
| tree | ff24a78f815591d8309e368e504347371d96ef60 | |
| parent | c2f1a551dea8b37c2e0cb886885c250fb703e9d8 (diff) | |
| download | blackbird-op-linux-47f9940c55c0bdc65188749cae4e841601f513bb.tar.gz blackbird-op-linux-47f9940c55c0bdc65188749cae4e841601f513bb.zip | |
knfsd: nfsd4: don't delegate files that have had conflicts
One more incremental delegation policy improvement: don't give out a
delegation on a file if conflicting access has previously required that a
delegation be revoked on that file. (In practice we'll forget about the
conflict when the struct nfs4_file is removed on close, so this is of limited
use for now, though it should at least solve a temporary problem with
self-conflicts on write opens from the same client.)
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/nfsd/nfs4state.c | 4 | ||||
| -rw-r--r-- | include/linux/nfsd/state.h | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 46249886ea86..e4a4c87ec8c6 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -195,6 +195,8 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; dprintk("NFSD alloc_init_deleg\n"); + if (fp->fi_had_conflict) + return NULL; if (num_delegations > max_delegations) return NULL; dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); @@ -1002,6 +1004,7 @@ alloc_init_file(struct inode *ino) list_add(&fp->fi_hash, &file_hashtbl[hashval]); fp->fi_inode = igrab(ino); fp->fi_id = current_fileid++; + fp->fi_had_conflict = false; return fp; } return NULL; @@ -1328,6 +1331,7 @@ do_recall(void *__dp) { struct nfs4_delegation *dp = __dp; + dp->dl_file->fi_had_conflict = true; nfsd4_cb_recall(dp); return 0; } diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h index 732de9cad4a8..db348f749376 100644 --- a/include/linux/nfsd/state.h +++ b/include/linux/nfsd/state.h @@ -224,6 +224,7 @@ struct nfs4_file { struct inode *fi_inode; u32 fi_id; /* used with stateowner->so_id * for stateid_hashtbl hash */ + bool fi_had_conflict; }; /* |
