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author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 07:49:57 +0100 |
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committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 07:50:29 +0100 |
commit | 34286d6662308d82aed891852d04c7c3a2649b16 (patch) | |
tree | c4b7311404d302e7cb94df7a4690298e1059910a /fs/fat/namei_vfat.c | |
parent | fs: cache optimise dentry and inode for rcu-walk (diff) | |
download | linux-34286d6662308d82aed891852d04c7c3a2649b16.tar.xz linux-34286d6662308d82aed891852d04c7c3a2649b16.zip |
fs: rcu-walk aware d_revalidate method
Require filesystems be aware of .d_revalidate being called in rcu-walk
mode (nd->flags & LOOKUP_RCU). For now do a simple push down, returning
-ECHILD from all implementations.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/fat/namei_vfat.c')
-rw-r--r-- | fs/fat/namei_vfat.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index 3be5ed7d859f..e3ffc5e12332 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -43,6 +43,9 @@ static int vfat_revalidate_shortname(struct dentry *dentry) static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd) { + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + /* This is not negative dentry. Always valid. */ if (dentry->d_inode) return 1; @@ -51,6 +54,9 @@ static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd) static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd) { + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + /* * This is not negative dentry. Always valid. * |