/usr/src/kernel-patches/lustre/patches/vfs_races-2.6-suse.patch is in linux-patch-lustre 1.8.5+dfsg-3ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | fs/dcache.c | 24 ++++++++++++++++++++----
include/linux/dcache.h | 2 ++
2 files changed, 22 insertions(+), 4 deletions(-)
--- linux-2.6.0-test1/fs/dcache.c~vfs_races_2.5.72_rev1 2003-07-24 15:52:47.000000000 +0400
+++ linux-2.6.0-test1-alexey/fs/dcache.c 2003-09-13 16:21:16.000000000 +0400
@@ -212,6 +212,13 @@ int d_invalidate(struct dentry * dentry)
spin_unlock(&dcache_lock);
return 0;
}
+
+ /* network invalidation by Lustre */
+ if (dentry->d_flags & DCACHE_LUSTRE_INVALID) {
+ spin_unlock(&dcache_lock);
+ return 0;
+ }
+
/*
* Check whether to do a partial shrink_dcache
* to get rid of unused child entries.
@@ -1135,14 +1142,23 @@ void d_delete(struct dentry * dentry)
* Adds a dentry to the hash according to its name.
*/
-void d_rehash(struct dentry * entry)
+void d_rehash_cond(struct dentry * entry, int lock)
{
struct hlist_head *list = d_hash(entry->d_parent, entry->d_name.hash);
- spin_lock(&dcache_lock);
+ if (lock)
+ spin_lock(&dcache_lock);
entry->d_vfs_flags &= ~DCACHE_UNHASHED;
entry->d_bucket = list;
hlist_add_head_rcu(&entry->d_hash, list);
- spin_unlock(&dcache_lock);
+ if (lock)
+ spin_unlock(&dcache_lock);
+}
+
+EXPORT_SYMBOL(d_rehash_cond);
+
+void d_rehash(struct dentry * entry)
+{
+ d_rehash_cond(entry, 1);
}
#define do_switch(x,y) do { \
--- linux-2.6.0-test1/include/linux/dcache.h~vfs_races_2.5.72_rev1 2003-09-13 16:21:05.000000000 +0400
+++ linux-2.6.0-test1-alexey/include/linux/dcache.h 2003-09-13 16:21:16.000000000 +0400
@@ -156,6 +156,8 @@ d_iput: no no yes
#define DCACHE_REFERENCED 0x0008 /* Recently used, don't discard. */
#define DCACHE_UNHASHED 0x0010
+#define DCACHE_LUSTRE_INVALID 0x0020 /* Lustre invalidated */
+
extern spinlock_t dcache_lock;
@@ -254,6 +255,7 @@ extern int have_submounts(struct dentry
* This adds the entry to the hash queues.
*/
extern void d_rehash(struct dentry *);
+extern void d_rehash_cond(struct dentry *, int lock);
/**
* d_add - add dentry to hash queues
_
|