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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
commite5fd91f1ef340da553f7a79da9540c3db711c937 (patch)
treeb11842027dc6641da63f4bcc524f8678263304a3 /fs/cachefiles
parent2a9b0348e685a63d97486f6749622b61e9e3292f (diff)
Linux-libre 4.2-gnu
Diffstat (limited to 'fs/cachefiles')
-rw-r--r--fs/cachefiles/internal.h1
-rw-r--r--fs/cachefiles/namei.c33
2 files changed, 21 insertions, 13 deletions
diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h
index 8c52472d2..aecd0859e 100644
--- a/fs/cachefiles/internal.h
+++ b/fs/cachefiles/internal.h
@@ -43,7 +43,6 @@ struct cachefiles_object {
loff_t i_size; /* object size */
unsigned long flags;
#define CACHEFILES_OBJECT_ACTIVE 0 /* T if marked active */
-#define CACHEFILES_OBJECT_BURIED 1 /* T if preemptively buried */
atomic_t usage; /* object usage count */
uint8_t type; /* object type */
uint8_t new; /* T if object new */
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index ab857ab9f..fc1056f5c 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -97,7 +97,8 @@ static noinline void cachefiles_printk_object(struct cachefiles_object *object,
* call vfs_unlink(), vfs_rmdir() or vfs_rename()
*/
static void cachefiles_mark_object_buried(struct cachefiles_cache *cache,
- struct dentry *dentry)
+ struct dentry *dentry,
+ enum fscache_why_object_killed why)
{
struct cachefiles_object *object;
struct rb_node *p;
@@ -132,8 +133,9 @@ found_dentry:
pr_err("\n");
pr_err("Error: Can't preemptively bury live object\n");
cachefiles_printk_object(object, NULL);
- } else if (test_and_set_bit(CACHEFILES_OBJECT_BURIED, &object->flags)) {
- pr_err("Error: Object already preemptively buried\n");
+ } else {
+ if (why != FSCACHE_OBJECT_IS_STALE)
+ fscache_object_mark_killed(&object->fscache, why);
}
write_unlock(&cache->active_lock);
@@ -265,7 +267,8 @@ requeue:
static int cachefiles_bury_object(struct cachefiles_cache *cache,
struct dentry *dir,
struct dentry *rep,
- bool preemptive)
+ bool preemptive,
+ enum fscache_why_object_killed why)
{
struct dentry *grave, *trap;
struct path path, path_to_graveyard;
@@ -289,7 +292,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
ret = vfs_unlink(d_inode(dir), rep, NULL);
if (preemptive)
- cachefiles_mark_object_buried(cache, rep);
+ cachefiles_mark_object_buried(cache, rep, why);
}
mutex_unlock(&d_inode(dir)->i_mutex);
@@ -394,7 +397,7 @@ try_again:
"Rename failed with error %d", ret);
if (preemptive)
- cachefiles_mark_object_buried(cache, rep);
+ cachefiles_mark_object_buried(cache, rep, why);
}
unlock_rename(cache->graveyard, dir);
@@ -422,7 +425,7 @@ int cachefiles_delete_object(struct cachefiles_cache *cache,
mutex_lock_nested(&d_inode(dir)->i_mutex, I_MUTEX_PARENT);
- if (test_bit(CACHEFILES_OBJECT_BURIED, &object->flags)) {
+ if (test_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->fscache.flags)) {
/* object allocation for the same key preemptively deleted this
* object's file so that it could create its own file */
_debug("object preemptively buried");
@@ -433,7 +436,8 @@ int cachefiles_delete_object(struct cachefiles_cache *cache,
* may have been renamed */
if (dir == object->dentry->d_parent) {
ret = cachefiles_bury_object(cache, dir,
- object->dentry, false);
+ object->dentry, false,
+ FSCACHE_OBJECT_WAS_RETIRED);
} else {
/* it got moved, presumably by cachefilesd culling it,
* so it's no longer in the key path and we can ignore
@@ -522,7 +526,7 @@ lookup_again:
if (d_is_negative(next)) {
ret = cachefiles_has_space(cache, 1, 0);
if (ret < 0)
- goto create_error;
+ goto no_space_error;
path.dentry = dir;
ret = security_path_mkdir(&path, next, 0);
@@ -551,7 +555,7 @@ lookup_again:
if (d_is_negative(next)) {
ret = cachefiles_has_space(cache, 1, 0);
if (ret < 0)
- goto create_error;
+ goto no_space_error;
path.dentry = dir;
ret = security_path_mknod(&path, next, S_IFREG, 0);
@@ -602,7 +606,8 @@ lookup_again:
* mutex) */
object->dentry = NULL;
- ret = cachefiles_bury_object(cache, dir, next, true);
+ ret = cachefiles_bury_object(cache, dir, next, true,
+ FSCACHE_OBJECT_IS_STALE);
dput(next);
next = NULL;
@@ -610,6 +615,7 @@ lookup_again:
goto delete_error;
_debug("redo lookup");
+ fscache_object_retrying_stale(&object->fscache);
goto lookup_again;
}
}
@@ -662,6 +668,8 @@ lookup_again:
_leave(" = 0 [%lu]", d_backing_inode(object->dentry)->i_ino);
return 0;
+no_space_error:
+ fscache_object_mark_killed(&object->fscache, FSCACHE_OBJECT_NO_SPACE);
create_error:
_debug("create error %d", ret);
if (ret == -EIO)
@@ -927,7 +935,8 @@ int cachefiles_cull(struct cachefiles_cache *cache, struct dentry *dir,
/* actually remove the victim (drops the dir mutex) */
_debug("bury");
- ret = cachefiles_bury_object(cache, dir, victim, false);
+ ret = cachefiles_bury_object(cache, dir, victim, false,
+ FSCACHE_OBJECT_WAS_CULLED);
if (ret < 0)
goto error;