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| author |   Frank van der Linden <fllinden@amazon.com> | 2020-06-23 22:39:04 +0000 |
|---|---|---|
| committer |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-07-13 17:52:46 -0400 |
| commit | 95ad37f90c338e3fd4abf61cecfe02b6f3e080f0 (patch) | |
| tree | cc65ec6496ed30eb9a48cf2eeda6e19be734c65f /fs/nfs/nfs4super.c | |
| parent | NFSv4.2: hook in the user extended attribute handlers (diff) | |
| download | linux-dev-95ad37f90c338e3fd4abf61cecfe02b6f3e080f0.tar.xz linux-dev-95ad37f90c338e3fd4abf61cecfe02b6f3e080f0.zip | |
NFSv4.2: add client side xattr caching.
Implement client side caching for NFSv4.2 extended attributes. The cache
is a per-inode hashtable, with name/value entries. There is one special
entry for the listxattr cache.
NFS inodes have a pointer to a cache structure. The cache structure is
allocated on demand, freed when the cache is invalidated.
Memory shrinkers keep the size in check. Large entries (> PAGE_SIZE)
are collected by a separate shrinker, and freed more aggressively
than others.
Signed-off-by: Frank van der Linden <fllinden@amazon.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/nfs4super.c')
| -rw-r--r-- | fs/nfs/nfs4super.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 1475f932d7da..0c1ab846b83d 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -69,6 +69,7 @@ static void nfs4_evict_inode(struct inode *inode) pnfs_destroy_layout(NFS_I(inode)); /* First call standard NFS clear_inode() code */ nfs_clear_inode(inode); + nfs4_xattr_cache_zap(inode); } struct nfs_referral_count { @@ -268,6 +269,12 @@ static int __init init_nfs_v4(void) if (err) goto out1; +#ifdef CONFIG_NFS_V4_2 + err = nfs4_xattr_cache_init(); + if (err) + goto out2; +#endif + err = nfs4_register_sysctl(); if (err) goto out2; @@ -288,6 +295,9 @@ static void __exit exit_nfs_v4(void) nfs4_pnfs_v3_ds_connect_unload(); unregister_nfs_version(&nfs_v4); +#ifdef CONFIG_NFS_V4_2 + nfs4_xattr_cache_exit(); +#endif nfs4_unregister_sysctl(); nfs_idmap_quit(); nfs_dns_resolver_destroy(); |