aboutsummaryrefslogtreecommitdiff
path: root/fs/cachefiles
diff options
context:
space:
mode:
Diffstat (limited to 'fs/cachefiles')
-rw-r--r--fs/cachefiles/bind.c20
-rw-r--r--fs/cachefiles/daemon.c31
-rw-r--r--fs/cachefiles/interface.c106
-rw-r--r--fs/cachefiles/internal.h33
-rw-r--r--fs/cachefiles/key.c2
-rw-r--r--fs/cachefiles/main.c9
-rw-r--r--fs/cachefiles/namei.c128
-rw-r--r--fs/cachefiles/rdwr.c171
-rw-r--r--fs/cachefiles/security.c10
-rw-r--r--fs/cachefiles/xattr.c55
10 files changed, 353 insertions, 212 deletions
diff --git a/fs/cachefiles/bind.c b/fs/cachefiles/bind.c
index a2603e7c0bb..d749731dc0e 100644
--- a/fs/cachefiles/bind.c
+++ b/fs/cachefiles/bind.c
@@ -50,18 +50,18 @@ int cachefiles_daemon_bind(struct cachefiles_cache *cache, char *args)
cache->brun_percent < 100);
if (*args) {
- kerror("'bind' command doesn't take an argument");
+ pr_err("'bind' command doesn't take an argument");
return -EINVAL;
}
if (!cache->rootdirname) {
- kerror("No cache directory specified");
+ pr_err("No cache directory specified");
return -EINVAL;
}
/* don't permit already bound caches to be re-bound */
if (test_bit(CACHEFILES_READY, &cache->flags)) {
- kerror("Cache already bound");
+ pr_err("Cache already bound");
return -EBUSY;
}
@@ -124,13 +124,10 @@ static int cachefiles_daemon_add_cache(struct cachefiles_cache *cache)
/* check parameters */
ret = -EOPNOTSUPP;
if (!root->d_inode ||
- !root->d_inode->i_op ||
!root->d_inode->i_op->lookup ||
!root->d_inode->i_op->mkdir ||
!root->d_inode->i_op->setxattr ||
!root->d_inode->i_op->getxattr ||
- !root->d_sb ||
- !root->d_sb->s_op ||
!root->d_sb->s_op->statfs ||
!root->d_sb->s_op->sync_fs)
goto error_unsupported;
@@ -231,9 +228,7 @@ static int cachefiles_daemon_add_cache(struct cachefiles_cache *cache)
set_bit(CACHEFILES_READY, &cache->flags);
dput(root);
- printk(KERN_INFO "CacheFiles:"
- " File cache on %s registered\n",
- cache->cache.identifier);
+ pr_info("File cache on %s registered\n", cache->cache.identifier);
/* check how much space the cache has */
cachefiles_has_space(cache, 0, 0);
@@ -253,7 +248,7 @@ error_open_root:
kmem_cache_free(cachefiles_object_jar, fsdef);
error_root_object:
cachefiles_end_secure(cache, saved_cred);
- kerror("Failed to register: %d", ret);
+ pr_err("Failed to register: %d", ret);
return ret;
}
@@ -265,9 +260,8 @@ void cachefiles_daemon_unbind(struct cachefiles_cache *cache)
_enter("");
if (test_bit(CACHEFILES_READY, &cache->flags)) {
- printk(KERN_INFO "CacheFiles:"
- " File cache on %s unregistering\n",
- cache->cache.identifier);
+ pr_info("File cache on %s unregistering\n",
+ cache->cache.identifier);
fscache_withdraw_cache(&cache->cache);
}
diff --git a/fs/cachefiles/daemon.c b/fs/cachefiles/daemon.c
index 0a1467b1551..b078d3081d6 100644
--- a/fs/cachefiles/daemon.c
+++ b/fs/cachefiles/daemon.c
@@ -315,8 +315,7 @@ static unsigned int cachefiles_daemon_poll(struct file *file,
static int cachefiles_daemon_range_error(struct cachefiles_cache *cache,
char *args)
{
- kerror("Free space limits must be in range"
- " 0%%<=stop<cull<run<100%%");
+ pr_err("Free space limits must be in range 0%%<=stop<cull<run<100%%");
return -EINVAL;
}
@@ -476,12 +475,12 @@ static int cachefiles_daemon_dir(struct cachefiles_cache *cache, char *args)
_enter(",%s", args);
if (!*args) {
- kerror("Empty directory specified");
+ pr_err("Empty directory specified");
return -EINVAL;
}
if (cache->rootdirname) {
- kerror("Second cache directory specified");
+ pr_err("Second cache directory specified");
return -EEXIST;
}
@@ -504,12 +503,12 @@ static int cachefiles_daemon_secctx(struct cachefiles_cache *cache, char *args)
_enter(",%s", args);
if (!*args) {
- kerror("Empty security context specified");
+ pr_err("Empty security context specified");
return -EINVAL;
}
if (cache->secctx) {
- kerror("Second security context specified");
+ pr_err("Second security context specified");
return -EINVAL;
}
@@ -532,7 +531,7 @@ static int cachefiles_daemon_tag(struct cachefiles_cache *cache, char *args)
_enter(",%s", args);
if (!*args) {
- kerror("Empty tag specified");
+ pr_err("Empty tag specified");
return -EINVAL;
}
@@ -563,12 +562,12 @@ static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args)
goto inval;
if (!test_bit(CACHEFILES_READY, &cache->flags)) {
- kerror("cull applied to unready cache");
+ pr_err("cull applied to unready cache");
return -EIO;
}
if (test_bit(CACHEFILES_DEAD, &cache->flags)) {
- kerror("cull applied to dead cache");
+ pr_err("cull applied to dead cache");
return -EIO;
}
@@ -588,11 +587,11 @@ static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args)
notdir:
path_put(&path);
- kerror("cull command requires dirfd to be a directory");
+ pr_err("cull command requires dirfd to be a directory");
return -ENOTDIR;
inval:
- kerror("cull command requires dirfd and filename");
+ pr_err("cull command requires dirfd and filename");
return -EINVAL;
}
@@ -615,7 +614,7 @@ static int cachefiles_daemon_debug(struct cachefiles_cache *cache, char *args)
return 0;
inval:
- kerror("debug command requires mask");
+ pr_err("debug command requires mask");
return -EINVAL;
}
@@ -635,12 +634,12 @@ static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args)
goto inval;
if (!test_bit(CACHEFILES_READY, &cache->flags)) {
- kerror("inuse applied to unready cache");
+ pr_err("inuse applied to unready cache");
return -EIO;
}
if (test_bit(CACHEFILES_DEAD, &cache->flags)) {
- kerror("inuse applied to dead cache");
+ pr_err("inuse applied to dead cache");
return -EIO;
}
@@ -660,11 +659,11 @@ static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args)
notdir:
path_put(&path);
- kerror("inuse command requires dirfd to be a directory");
+ pr_err("inuse command requires dirfd to be a directory");
return -ENOTDIR;
inval:
- kerror("inuse command requires dirfd and filename");
+ pr_err("inuse command requires dirfd and filename");
return -EINVAL;
}
diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c
index 37fe101a4e0..584743d456c 100644
--- a/fs/cachefiles/interface.c
+++ b/fs/cachefiles/interface.c
@@ -11,11 +11,8 @@
#include <linux/slab.h>
#include <linux/mount.h>
-#include <linux/buffer_head.h>
#include "internal.h"
-#define list_to_page(head) (list_entry((head)->prev, struct page, lru))
-
struct cachefiles_lookup_data {
struct cachefiles_xattr *auxdata; /* auxiliary data */
char *key; /* key path */
@@ -42,12 +39,12 @@ static struct fscache_object *cachefiles_alloc_object(
_enter("{%s},%p,", cache->cache.identifier, cookie);
- lookup_data = kmalloc(sizeof(*lookup_data), GFP_KERNEL);
+ lookup_data = kmalloc(sizeof(*lookup_data), cachefiles_gfp);
if (!lookup_data)
goto nomem_lookup_data;
/* create a new object record and a temporary leaf image */
- object = kmem_cache_alloc(cachefiles_object_jar, GFP_KERNEL);
+ object = kmem_cache_alloc(cachefiles_object_jar, cachefiles_gfp);
if (!object)
goto nomem_object;
@@ -64,7 +61,7 @@ static struct fscache_object *cachefiles_alloc_object(
* - stick the length on the front and leave space on the back for the
* encoder
*/
- buffer = kmalloc((2 + 512) + 3, GFP_KERNEL);
+ buffer = kmalloc((2 + 512) + 3, cachefiles_gfp);
if (!buffer)
goto nomem_buffer;
@@ -149,8 +146,7 @@ static int cachefiles_lookup_object(struct fscache_object *_object)
if (ret < 0 && ret != -ETIMEDOUT) {
if (ret != -ENOBUFS)
- printk(KERN_WARNING
- "CacheFiles: Lookup failed error %d\n", ret);
+ pr_warn("Lookup failed error %d\n", ret);
fscache_object_lookup_error(&object->fscache);
}
@@ -197,7 +193,7 @@ struct fscache_object *cachefiles_grab_object(struct fscache_object *_object)
}
/*
- * update the auxilliary data for an object object on disk
+ * update the auxiliary data for an object object on disk
*/
static void cachefiles_update_object(struct fscache_object *_object)
{
@@ -213,20 +209,29 @@ static void cachefiles_update_object(struct fscache_object *_object)
object = container_of(_object, struct cachefiles_object, fscache);
cache = container_of(object->fscache.cache, struct cachefiles_cache,
cache);
+
+ if (!fscache_use_cookie(_object)) {
+ _leave(" [relinq]");
+ return;
+ }
+
cookie = object->fscache.cookie;
if (!cookie->def->get_aux) {
+ fscache_unuse_cookie(_object);
_leave(" [no aux]");
return;
}
- auxdata = kmalloc(2 + 512 + 3, GFP_KERNEL);
+ auxdata = kmalloc(2 + 512 + 3, cachefiles_gfp);
if (!auxdata) {
+ fscache_unuse_cookie(_object);
_leave(" [nomem]");
return;
}
auxlen = cookie->def->get_aux(cookie->netfs_data, auxdata->data, 511);
+ fscache_unuse_cookie(_object);
ASSERTCMP(auxlen, <, 511);
auxdata->len = auxlen + 1;
@@ -264,7 +269,7 @@ static void cachefiles_drop_object(struct fscache_object *_object)
#endif
/* delete retired objects */
- if (object->fscache.state == FSCACHE_OBJECT_RECYCLING &&
+ if (test_bit(FSCACHE_OBJECT_RETIRED, &object->fscache.flags) &&
_object != cache->cache.fsdef
) {
_debug("- retire object OBJ%x", object->fscache.debug_id);
@@ -372,6 +377,31 @@ static void cachefiles_sync_cache(struct fscache_cache *_cache)
}
/*
+ * check if the backing cache is updated to FS-Cache
+ * - called by FS-Cache when evaluates if need to invalidate the cache
+ */
+static bool cachefiles_check_consistency(struct fscache_operation *op)
+{
+ struct cachefiles_object *object;
+ struct cachefiles_cache *cache;
+ const struct cred *saved_cred;
+ int ret;
+
+ _enter("{OBJ%x}", op->object->debug_id);
+
+ object = container_of(op->object, struct cachefiles_object, fscache);
+ cache = container_of(object->fscache.cache,
+ struct cachefiles_cache, cache);
+
+ cachefiles_begin_secure(cache, &saved_cred);
+ ret = cachefiles_check_auxdata(object);
+ cachefiles_end_secure(cache, saved_cred);
+
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
* notification the attributes on an object have changed
* - called with reads/writes excluded by FS-Cache
*/
@@ -418,14 +448,14 @@ static int cachefiles_attr_changed(struct fscache_object *_object)
_debug("discard tail %llx", oi_size);
newattrs.ia_valid = ATTR_SIZE;
newattrs.ia_size = oi_size & PAGE_MASK;
- ret = notify_change(object->backer, &newattrs);
+ ret = notify_change(object->backer, &newattrs, NULL);
if (ret < 0)
goto truncate_failed;
}
newattrs.ia_valid = ATTR_SIZE;
newattrs.ia_size = ni_size;
- ret = notify_change(object->backer, &newattrs);
+ ret = notify_change(object->backer, &newattrs, NULL);
truncate_failed:
mutex_unlock(&object->backer->d_inode->i_mutex);
@@ -442,6 +472,54 @@ truncate_failed:
}
/*
+ * Invalidate an object
+ */
+static void cachefiles_invalidate_object(struct fscache_operation *op)
+{
+ struct cachefiles_object *object;
+ struct cachefiles_cache *cache;
+ const struct cred *saved_cred;
+ struct path path;
+ uint64_t ni_size;
+ int ret;
+
+ object = container_of(op->object, struct cachefiles_object, fscache);
+ cache = container_of(object->fscache.cache,
+ struct cachefiles_cache, cache);
+
+ op->object->cookie->def->get_attr(op->object->cookie->netfs_data,
+ &ni_size);
+
+ _enter("{OBJ%x},[%llu]",
+ op->object->debug_id, (unsigned long long)ni_size);
+
+ if (object->backer) {
+ ASSERT(S_ISREG(object->backer->d_inode->i_mode));
+
+ fscache_set_store_limit(&object->fscache, ni_size);
+
+ path.dentry = object->backer;
+ path.mnt = cache->mnt;
+
+ cachefiles_begin_secure(cache, &saved_cred);
+ ret = vfs_truncate(&path, 0);
+ if (ret == 0)
+ ret = vfs_truncate(&path, ni_size);
+ cachefiles_end_secure(cache, saved_cred);
+
+ if (ret != 0) {
+ fscache_set_store_limit(&object->fscache, 0);
+ if (ret == -EIO)
+ cachefiles_io_error_obj(object,
+ "Invalidate failed");
+ }
+ }
+
+ fscache_op_complete(op, true);
+ _leave("");
+}
+
+/*
* dissociate a cache from all the pages it was backing
*/
static void cachefiles_dissociate_pages(struct fscache_cache *cache)
@@ -456,6 +534,7 @@ const struct fscache_cache_ops cachefiles_cache_ops = {
.lookup_complete = cachefiles_lookup_complete,
.grab_object = cachefiles_grab_object,
.update_object = cachefiles_update_object,
+ .invalidate_object = cachefiles_invalidate_object,
.drop_object = cachefiles_drop_object,
.put_object = cachefiles_put_object,
.sync_cache = cachefiles_sync_cache,
@@ -467,4 +546,5 @@ const struct fscache_cache_ops cachefiles_cache_ops = {
.write_page = cachefiles_write_page,
.uncache_page = cachefiles_uncache_page,
.dissociate_pages = cachefiles_dissociate_pages,
+ .check_consistency = cachefiles_check_consistency,
};
diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h
index bd6bc1bde2d..3d50998abf5 100644
--- a/fs/cachefiles/internal.h
+++ b/fs/cachefiles/internal.h
@@ -9,6 +9,13 @@
* 2 of the Licence, or (at your option) any later version.
*/
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) "CacheFiles: " fmt
+
+
#include <linux/fscache-cache.h>
#include <linux/timer.h>
#include <linux/wait.h>
@@ -23,6 +30,8 @@ extern unsigned cachefiles_debug;
#define CACHEFILES_DEBUG_KLEAVE 2
#define CACHEFILES_DEBUG_KDEBUG 4
+#define cachefiles_gfp (__GFP_WAIT | __GFP_NORETRY | __GFP_NOMEMALLOC)
+
/*
* node records
*/
@@ -233,6 +242,7 @@ extern int cachefiles_set_object_xattr(struct cachefiles_object *object,
struct cachefiles_xattr *auxdata);
extern int cachefiles_update_object_xattr(struct cachefiles_object *object,
struct cachefiles_xattr *auxdata);
+extern int cachefiles_check_auxdata(struct cachefiles_object *object);
extern int cachefiles_check_object_xattr(struct cachefiles_object *object,
struct cachefiles_xattr *auxdata);
extern int cachefiles_remove_object_xattr(struct cachefiles_cache *cache,
@@ -242,11 +252,10 @@ extern int cachefiles_remove_object_xattr(struct cachefiles_cache *cache,
/*
* error handling
*/
-#define kerror(FMT, ...) printk(KERN_ERR "CacheFiles: "FMT"\n", ##__VA_ARGS__)
#define cachefiles_io_error(___cache, FMT, ...) \
do { \
- kerror("I/O Error: " FMT, ##__VA_ARGS__); \
+ pr_err("I/O Error: " FMT, ##__VA_ARGS__); \
fscache_io_error(&(___cache)->cache); \
set_bit(CACHEFILES_DEAD, &(___cache)->flags); \
} while (0)
@@ -307,8 +316,8 @@ do { \
#define ASSERT(X) \
do { \
if (unlikely(!(X))) { \
- printk(KERN_ERR "\n"); \
- printk(KERN_ERR "CacheFiles: Assertion failed\n"); \
+ pr_err("\n"); \
+ pr_err("Assertion failed\n"); \
BUG(); \
} \
} while (0)
@@ -316,9 +325,9 @@ do { \
#define ASSERTCMP(X, OP, Y) \
do { \
if (unlikely(!((X) OP (Y)))) { \
- printk(KERN_ERR "\n"); \
- printk(KERN_ERR "CacheFiles: Assertion failed\n"); \
- printk(KERN_ERR "%lx " #OP " %lx is false\n", \
+ pr_err("\n"); \
+ pr_err("Assertion failed\n"); \
+ pr_err("%lx " #OP " %lx is false\n", \
(unsigned long)(X), (unsigned long)(Y)); \
BUG(); \
} \
@@ -327,8 +336,8 @@ do { \
#define ASSERTIF(C, X) \
do { \
if (unlikely((C) && !(X))) { \
- printk(KERN_ERR "\n"); \
- printk(KERN_ERR "CacheFiles: Assertion failed\n"); \
+ pr_err("\n"); \
+ pr_err("Assertion failed\n"); \
BUG(); \
} \
} while (0)
@@ -336,9 +345,9 @@ do { \
#define ASSERTIFCMP(C, X, OP, Y) \
do { \
if (unlikely((C) && !((X) OP (Y)))) { \
- printk(KERN_ERR "\n"); \
- printk(KERN_ERR "CacheFiles: Assertion failed\n"); \
- printk(KERN_ERR "%lx " #OP " %lx is false\n", \
+ pr_err("\n"); \
+ pr_err("Assertion failed\n"); \
+ pr_err("%lx " #OP " %lx is false\n", \
(unsigned long)(X), (unsigned long)(Y)); \
BUG(); \
} \
diff --git a/fs/cachefiles/key.c b/fs/cachefiles/key.c
index 81b8b2b3a67..33b58c60f2d 100644
--- a/fs/cachefiles/key.c
+++ b/fs/cachefiles/key.c
@@ -78,7 +78,7 @@ char *cachefiles_cook_key(const u8 *raw, int keylen, uint8_t type)
_debug("max: %d", max);
- key = kmalloc(max, GFP_KERNEL);
+ key = kmalloc(max, cachefiles_gfp);
if (!key)
return NULL;
diff --git a/fs/cachefiles/main.c b/fs/cachefiles/main.c
index 4bfa8cf43bf..180edfb45f6 100644
--- a/fs/cachefiles/main.c
+++ b/fs/cachefiles/main.c
@@ -68,8 +68,7 @@ static int __init cachefiles_init(void)
SLAB_HWCACHE_ALIGN,
cachefiles_object_init_once);
if (!cachefiles_object_jar) {
- printk(KERN_NOTICE
- "CacheFiles: Failed to allocate an object jar\n");
+ pr_notice("Failed to allocate an object jar\n");
goto error_object_jar;
}
@@ -77,7 +76,7 @@ static int __init cachefiles_init(void)
if (ret < 0)
goto error_proc;
- printk(KERN_INFO "CacheFiles: Loaded\n");
+ pr_info("Loaded\n");
return 0;
error_proc:
@@ -85,7 +84,7 @@ error_proc:
error_object_jar:
misc_deregister(&cachefiles_dev);
error_dev:
- kerror("failed to register: %d", ret);
+ pr_err("failed to register: %d", ret);
return ret;
}
@@ -96,7 +95,7 @@ fs_initcall(cachefiles_init);
*/
static void __exit cachefiles_exit(void)
{
- printk(KERN_INFO "CacheFiles: Unloading\n");
+ pr_info("Unloading\n");
cachefiles_proc_cleanup();
kmem_cache_destroy(cachefiles_object_jar);
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index 42c7fafc8bf..5bf2b41e66d 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -35,44 +35,42 @@ void __cachefiles_printk_object(struct cachefiles_object *object,
struct fscache_cookie *cookie;
unsigned keylen, loop;
- printk(KERN_ERR "%sobject: OBJ%x\n",
- prefix, object->fscache.debug_id);
- printk(KERN_ERR "%sobjstate=%s fl=%lx wbusy=%x ev=%lx[%lx]\n",
- prefix, fscache_object_states[object->fscache.state],
+ pr_err("%sobject: OBJ%x\n", prefix, object->fscache.debug_id);
+ pr_err("%sobjstate=%s fl=%lx wbusy=%x ev=%lx[%lx]\n",
+ prefix, object->fscache.state->name,
object->fscache.flags, work_busy(&object->fscache.work),
- object->fscache.events,
- object->fscache.event_mask & FSCACHE_OBJECT_EVENTS_MASK);
- printk(KERN_ERR "%sops=%u inp=%u exc=%u\n",
+ object->fscache.events, object->fscache.event_mask);
+ pr_err("%sops=%u inp=%u exc=%u\n",
prefix, object->fscache.n_ops, object->fscache.n_in_progress,
object->fscache.n_exclusive);
- printk(KERN_ERR "%sparent=%p\n",
+ pr_err("%sparent=%p\n",
prefix, object->fscache.parent);
spin_lock(&object->fscache.lock);
cookie = object->fscache.cookie;
if (cookie) {
- printk(KERN_ERR "%scookie=%p [pr=%p nd=%p fl=%lx]\n",
+ pr_err("%scookie=%p [pr=%p nd=%p fl=%lx]\n",
prefix,
object->fscache.cookie,
object->fscache.cookie->parent,
object->fscache.cookie->netfs_data,
object->fscache.cookie->flags);
- if (keybuf)
+ if (keybuf && cookie->def)
keylen = cookie->def->get_key(cookie->netfs_data, keybuf,
CACHEFILES_KEYBUF_SIZE);
else
keylen = 0;
} else {
- printk(KERN_ERR "%scookie=NULL\n", prefix);
+ pr_err("%scookie=NULL\n", prefix);
keylen = 0;
}
spin_unlock(&object->fscache.lock);
if (keylen) {
- printk(KERN_ERR "%skey=[%u] '", prefix, keylen);
+ pr_err("%skey=[%u] '", prefix, keylen);
for (loop = 0; loop < keylen; loop++)
- printk("%02x", keybuf[loop]);
- printk("'\n");
+ pr_cont("%02x", keybuf[loop]);
+ pr_cont("'\n");
}
}
@@ -128,17 +126,15 @@ static void cachefiles_mark_object_buried(struct cachefiles_cache *cache,
found_dentry:
kdebug("preemptive burial: OBJ%x [%s] %p",
object->fscache.debug_id,
- fscache_object_states[object->fscache.state],
+ object->fscache.state->name,
dentry);
- if (object->fscache.state < FSCACHE_OBJECT_DYING) {
- printk(KERN_ERR "\n");
- printk(KERN_ERR "CacheFiles: Error:"
- " Can't preemptively bury live object\n");
+ if (fscache_object_is_live(&object->fscache)) {
+ 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)) {
- printk(KERN_ERR "CacheFiles: Error:"
- " Object already preemptively buried\n");
+ pr_err("Error: Object already preemptively buried\n");
}
write_unlock(&cache->active_lock);
@@ -161,7 +157,7 @@ try_again:
write_lock(&cache->active_lock);
if (test_and_set_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags)) {
- printk(KERN_ERR "CacheFiles: Error: Object already active\n");
+ pr_err("Error: Object already active\n");
cachefiles_printk_object(object, NULL);
BUG();
}
@@ -193,10 +189,9 @@ try_again:
/* an old object from a previous incarnation is hogging the slot - we
* need to wait for it to be destroyed */
wait_for_old_object:
- if (xobject->fscache.state < FSCACHE_OBJECT_DYING) {
- printk(KERN_ERR "\n");
- printk(KERN_ERR "CacheFiles: Error:"
- " Unexpected object collision\n");
+ if (fscache_object_is_live(&object->fscache)) {
+ pr_err("\n");
+ pr_err("Error: Unexpected object collision\n");
cachefiles_printk_object(object, xobject);
BUG();
}
@@ -242,9 +237,8 @@ wait_for_old_object:
}
if (timeout <= 0) {
- printk(KERN_ERR "\n");
- printk(KERN_ERR "CacheFiles: Error: Overlong"
- " wait for old active object to go away\n");
+ pr_err("\n");
+ pr_err("Error: Overlong wait for old active object to go away\n");
cachefiles_printk_object(object, xobject);
goto requeue;
}
@@ -275,6 +269,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
bool preemptive)
{
struct dentry *grave, *trap;
+ struct path path, path_to_graveyard;
char nbuffer[8 + 8 + 1];
int ret;
@@ -287,10 +282,18 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
/* non-directories can just be unlinked */
if (!S_ISDIR(rep->d_inode->i_mode)) {
_debug("unlink stale object");
- ret = vfs_unlink(dir->d_inode, rep);
- if (preemptive)
- cachefiles_mark_object_buried(cache, rep);
+ path.mnt = cache->mnt;
+ path.dentry = dir;
+ ret = security_path_unlink(&path, rep);
+ if (ret < 0) {
+ cachefiles_io_error(cache, "Unlink security error");
+ } else {
+ ret = vfs_unlink(dir->d_inode, rep, NULL);
+
+ if (preemptive)
+ cachefiles_mark_object_buried(cache, rep);
+ }
mutex_unlock(&dir->d_inode->i_mutex);
@@ -379,12 +382,23 @@ try_again:
}
/* attempt the rename */
- ret = vfs_rename(dir->d_inode, rep, cache->graveyard->d_inode, grave);
- if (ret != 0 && ret != -ENOMEM)
- cachefiles_io_error(cache, "Rename failed with error %d", ret);
+ path.mnt = cache->mnt;
+ path.dentry = dir;
+ path_to_graveyard.mnt = cache->mnt;
+ path_to_graveyard.dentry = cache->graveyard;
+ ret = security_path_rename(&path, rep, &path_to_graveyard, grave, 0);
+ if (ret < 0) {
+ cachefiles_io_error(cache, "Rename security error %d", ret);
+ } else {
+ ret = vfs_rename(dir->d_inode, rep,
+ cache->graveyard->d_inode, grave, NULL, 0);
+ if (ret != 0 && ret != -ENOMEM)
+ cachefiles_io_error(cache,
+ "Rename failed with error %d", ret);
- if (preemptive)
- cachefiles_mark_object_buried(cache, rep);
+ if (preemptive)
+ cachefiles_mark_object_buried(cache, rep);
+ }
unlock_rename(cache->graveyard, dir);
dput(grave);
@@ -448,6 +462,7 @@ int cachefiles_walk_to_object(struct cachefiles_object *parent,
{
struct cachefiles_cache *cache;
struct dentry *dir, *next = NULL;
+ struct path path;
unsigned long start;
const char *name;
int ret, nlen;
@@ -458,6 +473,7 @@ int cachefiles_walk_to_object(struct cachefiles_object *parent,
cache = container_of(parent->fscache.cache,
struct cachefiles_cache, cache);
+ path.mnt = cache->mnt;
ASSERT(parent->dentry);
ASSERT(parent->dentry->d_inode);
@@ -511,6 +527,10 @@ lookup_again:
if (ret < 0)
goto create_error;
+ path.dentry = dir;
+ ret = security_path_mkdir(&path, next, 0);
+ if (ret < 0)
+ goto create_error;
start = jiffies;
ret = vfs_mkdir(dir->d_inode, next, 0);
cachefiles_hist(cachefiles_mkdir_histogram, start);
@@ -523,7 +543,7 @@ lookup_again:
next, next->d_inode, next->d_inode->i_ino);
} else if (!S_ISDIR(next->d_inode->i_mode)) {
- kerror("inode %lu is not a directory",
+ pr_err("inode %lu is not a directory",
next->d_inode->i_ino);
ret = -ENOBUFS;
goto error;
@@ -536,8 +556,12 @@ lookup_again:
if (ret < 0)
goto create_error;
+ path.dentry = dir;
+ ret = security_path_mknod(&path, next, S_IFREG, 0);
+ if (ret < 0)
+ goto create_error;
start = jiffies;
- ret = vfs_create(dir->d_inode, next, S_IFREG, NULL);
+ ret = vfs_create(dir->d_inode, next, S_IFREG, true);
cachefiles_hist(cachefiles_create_histogram, start);
if (ret < 0)
goto create_error;
@@ -550,7 +574,7 @@ lookup_again:
} else if (!S_ISDIR(next->d_inode->i_mode) &&
!S_ISREG(next->d_inode->i_mode)
) {
- kerror("inode %lu is not a file or directory",
+ pr_err("inode %lu is not a file or directory",
next->d_inode->i_ino);
ret = -ENOBUFS;
goto error;
@@ -616,7 +640,8 @@ lookup_again:
* (this is used to keep track of culling, and atimes are only
* updated by read, write and readdir but not lookup or
* open) */
- touch_atime(cache->mnt, next);
+ path.dentry = next;
+ touch_atime(&path);
}
/* open a file interface onto a data file */
@@ -692,6 +717,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
{
struct dentry *subdir;
unsigned long start;
+ struct path path;
int ret;
_enter(",,%s", dirname);
@@ -719,6 +745,11 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
_debug("attempt mkdir");
+ path.mnt = cache->mnt;
+ path.dentry = dir;
+ ret = security_path_mkdir(&path, subdir, 0700);
+ if (ret < 0)
+ goto mkdir_error;
ret = vfs_mkdir(dir->d_inode, subdir, 0700);
if (ret < 0)
goto mkdir_error;
@@ -737,14 +768,13 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
ASSERT(subdir->d_inode);
if (!S_ISDIR(subdir->d_inode->i_mode)) {
- kerror("%s is not a directory", dirname);
+ pr_err("%s is not a directory", dirname);
ret = -EIO;
goto check_error;
}
ret = -EPERM;
- if (!subdir->d_inode->i_op ||
- !subdir->d_inode->i_op->setxattr ||
+ if (!subdir->d_inode->i_op->setxattr ||
!subdir->d_inode->i_op->getxattr ||
!subdir->d_inode->i_op->lookup ||
!subdir->d_inode->i_op->mkdir ||
@@ -765,13 +795,13 @@ check_error:
mkdir_error:
mutex_unlock(&dir->d_inode->i_mutex);
dput(subdir);
- kerror("mkdir %s failed with error %d", dirname, ret);
+ pr_err("mkdir %s failed with error %d", dirname, ret);
return ERR_PTR(ret);
lookup_error:
mutex_unlock(&dir->d_inode->i_mutex);
ret = PTR_ERR(subdir);
- kerror("Lookup %s failed with error %d", dirname, ret);
+ pr_err("Lookup %s failed with error %d", dirname, ret);
return ERR_PTR(ret);
nomem_d_alloc:
@@ -800,7 +830,7 @@ static struct dentry *cachefiles_check_active(struct cachefiles_cache *cache,
// dir->d_name.len, dir->d_name.len, dir->d_name.name, filename);
/* look up the victim */
- mutex_lock_nested(&dir->d_inode->i_mutex, 1);
+ mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
start = jiffies;
victim = lookup_one_len(filename, dir, strlen(filename));
@@ -861,7 +891,7 @@ lookup_error:
if (ret == -EIO) {
cachefiles_io_error(cache, "Lookup failed");
} else if (ret != -ENOMEM) {
- kerror("Internal error: %d", ret);
+ pr_err("Internal error: %d", ret);
ret = -EIO;
}
@@ -920,7 +950,7 @@ error:
}
if (ret != -ENOMEM) {
- kerror("Internal error: %d", ret);
+ pr_err("Internal error: %d", ret);
ret = -EIO;
}
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 0e3c0924cc3..4b1fb5ca65b 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -12,6 +12,7 @@
#include <linux/mount.h>
#include <linux/slab.h>
#include <linux/file.h>
+#include <linux/swap.h>
#include "internal.h"
/*
@@ -77,25 +78,25 @@ static int cachefiles_read_reissue(struct cachefiles_object *object,
struct page *backpage = monitor->back_page, *backpage2;
int ret;
- kenter("{ino=%lx},{%lx,%lx}",
+ _enter("{ino=%lx},{%lx,%lx}",
object->backer->d_inode->i_ino,
backpage->index, backpage->flags);
/* skip if the page was truncated away completely */
if (backpage->mapping != bmapping) {
- kleave(" = -ENODATA [mapping]");
+ _leave(" = -ENODATA [mapping]");
return -ENODATA;
}
backpage2 = find_get_page(bmapping, backpage->index);
if (!backpage2) {
- kleave(" = -ENODATA [gone]");
+ _leave(" = -ENODATA [gone]");
return -ENODATA;
}
if (backpage != backpage2) {
put_page(backpage2);
- kleave(" = -ENODATA [different]");
+ _leave(" = -ENODATA [different]");
return -ENODATA;
}
@@ -114,7 +115,7 @@ static int cachefiles_read_reissue(struct cachefiles_object *object,
if (PageUptodate(backpage))
goto unlock_discard;
- kdebug("reissue read");
+ _debug("reissue read");
ret = bmapping->a_ops->readpage(NULL, backpage);
if (ret < 0)
goto unlock_discard;
@@ -129,7 +130,7 @@ static int cachefiles_read_reissue(struct cachefiles_object *object,
}
/* it'll reappear on the todo list */
- kleave(" = -EINPROGRESS");
+ _leave(" = -EINPROGRESS");
return -EINPROGRESS;
unlock_discard:
@@ -137,7 +138,7 @@ unlock_discard:
spin_lock_irq(&object->work_lock);
list_del(&monitor->op_link);
spin_unlock_irq(&object->work_lock);
- kleave(" = %d", ret);
+ _leave(" = %d", ret);
return ret;
}
@@ -174,11 +175,13 @@ static void cachefiles_read_copier(struct fscache_operation *_op)
_debug("- copy {%lu}", monitor->back_page->index);
recheck:
- if (PageUptodate(monitor->back_page)) {
+ if (test_bit(FSCACHE_COOKIE_INVALIDATING,
+ &object->fscache.cookie->flags)) {
+ error = -ESTALE;
+ } else if (PageUptodate(monitor->back_page)) {
copy_highpage(monitor->netfs_page, monitor->back_page);
-
- pagevec_add(&pagevec, monitor->netfs_page);
- fscache_mark_pages_cached(monitor->op, &pagevec);
+ fscache_mark_page_cached(monitor->op,
+ monitor->netfs_page);
error = 0;
} else if (!PageError(monitor->back_page)) {
/* the page has probably been truncated */
@@ -198,6 +201,7 @@ static void cachefiles_read_copier(struct fscache_operation *_op)
fscache_end_io(op, monitor->netfs_page, error);
page_cache_release(monitor->netfs_page);
+ fscache_retrieval_complete(op, 1);
fscache_put_retrieval(op);
kfree(monitor);
@@ -224,8 +228,7 @@ static void cachefiles_read_copier(struct fscache_operation *_op)
*/
static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
struct fscache_retrieval *op,
- struct page *netpage,
- struct pagevec *pagevec)
+ struct page *netpage)
{
struct cachefiles_one_read *monitor;
struct address_space *bmapping;
@@ -234,12 +237,10 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
_enter("");
- pagevec_reinit(pagevec);
-
_debug("read back %p{%lu,%d}",
netpage, netpage->index, page_count(netpage));
- monitor = kzalloc(sizeof(*monitor), GFP_KERNEL);
+ monitor = kzalloc(sizeof(*monitor), cachefiles_gfp);
if (!monitor)
goto nomem;
@@ -258,31 +259,28 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
goto backing_page_already_present;
if (!newpage) {
- newpage = page_cache_alloc_cold(bmapping);
+ newpage = __page_cache_alloc(cachefiles_gfp |
+ __GFP_COLD);
if (!newpage)
goto nomem_monitor;
}
- ret = add_to_page_cache(newpage, bmapping,
- netpage->index, GFP_KERNEL);
+ ret = add_to_page_cache_lru(newpage, bmapping,
+ netpage->index, cachefiles_gfp);
if (ret == 0)
goto installed_new_backing_page;
if (ret != -EEXIST)
goto nomem_page;
}
- /* we've installed a new backing page, so now we need to add it
- * to the LRU list and start it reading */
+ /* we've installed a new backing page, so now we need to start
+ * it reading */
installed_new_backing_page:
_debug("- new %p", newpage);
backpage = newpage;
newpage = NULL;
- page_cache_get(backpage);
- pagevec_add(pagevec, backpage);
- __pagevec_lru_add_file(pagevec);
-
read_backing_page:
ret = bmapping->a_ops->readpage(NULL, backpage);
if (ret < 0)
@@ -335,11 +333,11 @@ backing_page_already_present:
backing_page_already_uptodate:
_debug("- uptodate");
- pagevec_add(pagevec, netpage);
- fscache_mark_pages_cached(op, pagevec);
+ fscache_mark_page_cached(op, netpage);
copy_highpage(netpage, backpage);
fscache_end_io(op, netpage, 0);
+ fscache_retrieval_complete(op, 1);
success:
_debug("success");
@@ -357,10 +355,13 @@ out:
read_error:
_debug("read error %d", ret);
- if (ret == -ENOMEM)
+ if (ret == -ENOMEM) {
+ fscache_retrieval_complete(op, 1);
goto out;
+ }
io_error:
cachefiles_io_error_obj(object, "Page read error on backing file");
+ fscache_retrieval_complete(op, 1);
ret = -ENOBUFS;
goto out;
@@ -370,6 +371,7 @@ nomem_monitor:
fscache_put_retrieval(monitor->op);
kfree(monitor);
nomem:
+ fscache_retrieval_complete(op, 1);
_leave(" = -ENOMEM");
return -ENOMEM;
}
@@ -408,7 +410,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
_enter("{%p},{%lx},,,", object, page->index);
if (!object->backer)
- return -ENOBUFS;
+ goto enobufs;
inode = object->backer->d_inode;
ASSERT(S_ISREG(inode->i_mode));
@@ -417,7 +419,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
/* calculate the shift required to use bmap */
if (inode->i_sb->s_blocksize > PAGE_SIZE)
- return -ENOBUFS;
+ goto enobufs;
shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits;
@@ -444,19 +446,23 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
if (block) {
/* submit the apparently valid page to the backing fs to be
* read from disk */
- ret = cachefiles_read_backing_file_one(object, op, page,
- &pagevec);
+ ret = cachefiles_read_backing_file_one(object, op, page);
} else if (cachefiles_has_space(cache, 0, 1) == 0) {
/* there's space in the cache we can use */
- pagevec_add(&pagevec, page);
- fscache_mark_pages_cached(op, &pagevec);
+ fscache_mark_page_cached(op, page);
+ fscache_retrieval_complete(op, 1);
ret = -ENODATA;
} else {
- ret = -ENOBUFS;
+ goto enobufs;
}
_leave(" = %d", ret);
return ret;
+
+enobufs:
+ fscache_retrieval_complete(op, 1);
+ _leave(" = -ENOBUFS");
+ return -ENOBUFS;
}
/*
@@ -465,19 +471,15 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
*/
static int cachefiles_read_backing_file(struct cachefiles_object *object,
struct fscache_retrieval *op,
- struct list_head *list,
- struct pagevec *mark_pvec)
+ struct list_head *list)
{
struct cachefiles_one_read *monitor = NULL;
struct address_space *bmapping = object->backer->d_inode->i_mapping;
- struct pagevec lru_pvec;
struct page *newpage = NULL, *netpage, *_n, *backpage = NULL;
int ret = 0;
_enter("");
- pagevec_init(&lru_pvec, 0);
-
list_for_each_entry_safe(netpage, _n, list, lru) {
list_del(&netpage->lru);
@@ -485,7 +487,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
netpage, netpage->index, page_count(netpage));
if (!monitor) {
- monitor = kzalloc(sizeof(*monitor), GFP_KERNEL);
+ monitor = kzalloc(sizeof(*monitor), cachefiles_gfp);
if (!monitor)
goto nomem;
@@ -500,31 +502,29 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
goto backing_page_already_present;
if (!newpage) {
- newpage = page_cache_alloc_cold(bmapping);
+ newpage = __page_cache_alloc(cachefiles_gfp |
+ __GFP_COLD);
if (!newpage)
goto nomem;
}
- ret = add_to_page_cache(newpage, bmapping,
- netpage->index, GFP_KERNEL);
+ ret = add_to_page_cache_lru(newpage, bmapping,
+ netpage->index,
+ cachefiles_gfp);
if (ret == 0)
goto installed_new_backing_page;
if (ret != -EEXIST)
goto nomem;
}
- /* we've installed a new backing page, so now we need to add it
- * to the LRU list and start it reading */
+ /* we've installed a new backing page, so now we need
+ * to start it reading */
installed_new_backing_page:
_debug("- new %p", newpage);
backpage = newpage;
newpage = NULL;
- page_cache_get(backpage);
- if (!pagevec_add(&lru_pvec, backpage))
- __pagevec_lru_add_file(&lru_pvec);
-
reread_backing_page:
ret = bmapping->a_ops->readpage(NULL, backpage);
if (ret < 0)
@@ -535,20 +535,17 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
monitor_backing_page:
_debug("- monitor add");
- ret = add_to_page_cache(netpage, op->mapping, netpage->index,
- GFP_KERNEL);
+ ret = add_to_page_cache_lru(netpage, op->mapping,
+ netpage->index, cachefiles_gfp);
if (ret < 0) {
if (ret == -EEXIST) {
page_cache_release(netpage);
+ fscache_retrieval_complete(op, 1);
continue;
}
goto nomem;
}
- page_cache_get(netpage);
- if (!pagevec_add(&lru_pvec, netpage))
- __pagevec_lru_add_file(&lru_pvec);
-
/* install a monitor */
page_cache_get(netpage);
monitor->netfs_page = netpage;
@@ -611,11 +608,12 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
backing_page_already_uptodate:
_debug("- uptodate");
- ret = add_to_page_cache(netpage, op->mapping, netpage->index,
- GFP_KERNEL);
+ ret = add_to_page_cache_lru(netpage, op->mapping,
+ netpage->index, cachefiles_gfp);
if (ret < 0) {
if (ret == -EEXIST) {
page_cache_release(netpage);
+ fscache_retrieval_complete(op, 1);
continue;
}
goto nomem;
@@ -626,16 +624,13 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
page_cache_release(backpage);
backpage = NULL;
- if (!pagevec_add(mark_pvec, netpage))
- fscache_mark_pages_cached(op, mark_pvec);
-
- page_cache_get(netpage);
- if (!pagevec_add(&lru_pvec, netpage))
- __pagevec_lru_add_file(&lru_pvec);
+ fscache_mark_page_cached(op, netpage);
+ /* the netpage is unlocked and marked up to date here */
fscache_end_io(op, netpage, 0);
page_cache_release(netpage);
netpage = NULL;
+ fscache_retrieval_complete(op, 1);
continue;
}
@@ -645,8 +640,6 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
out:
/* tidy up */
- pagevec_lru_add_file(&lru_pvec);
-
if (newpage)
page_cache_release(newpage);
if (netpage)
@@ -661,6 +654,7 @@ out:
list_for_each_entry_safe(netpage, _n, list, lru) {
list_del(&netpage->lru);
page_cache_release(netpage);
+ fscache_retrieval_complete(op, 1);
}
_leave(" = %d", ret);
@@ -669,15 +663,17 @@ out:
nomem:
_debug("nomem");
ret = -ENOMEM;
- goto out;
+ goto record_page_complete;
read_error:
_debug("read error %d", ret);
if (ret == -ENOMEM)
- goto out;
+ goto record_page_complete;
io_error:
cachefiles_io_error_obj(object, "Page read error on backing file");
ret = -ENOBUFS;
+record_page_complete:
+ fscache_retrieval_complete(op, 1);
goto out;
}
@@ -709,7 +705,7 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
*nr_pages);
if (!object->backer)
- return -ENOBUFS;
+ goto all_enobufs;
space = 1;
if (cachefiles_has_space(cache, 0, *nr_pages) < 0)
@@ -722,7 +718,7 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
/* calculate the shift required to use bmap */
if (inode->i_sb->s_blocksize > PAGE_SIZE)
- return -ENOBUFS;
+ goto all_enobufs;
shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits;
@@ -762,7 +758,10 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
nrbackpages++;
} else if (space && pagevec_add(&pagevec, page) == 0) {
fscache_mark_pages_cached(op, &pagevec);
+ fscache_retrieval_complete(op, 1);
ret = -ENODATA;
+ } else {
+ fscache_retrieval_complete(op, 1);
}
}
@@ -775,18 +774,18 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
/* submit the apparently valid pages to the backing fs to be read from
* disk */
if (nrbackpages > 0) {
- ret2 = cachefiles_read_backing_file(object, op, &backpages,
- &pagevec);
+ ret2 = cachefiles_read_backing_file(object, op, &backpages);
if (ret2 == -ENOMEM || ret2 == -EINTR)
ret = ret2;
}
- if (pagevec_count(&pagevec) > 0)
- fscache_mark_pages_cached(op, &pagevec);
-
_leave(" = %d [nr=%u%s]",
ret, *nr_pages, list_empty(pages) ? " empty" : "");
return ret;
+
+all_enobufs:
+ fscache_retrieval_complete(op, *nr_pages);
+ return -ENOBUFS;
}
/*
@@ -806,7 +805,6 @@ int cachefiles_allocate_page(struct fscache_retrieval *op,
{
struct cachefiles_object *object;
struct cachefiles_cache *cache;
- struct pagevec pagevec;
int ret;
object = container_of(op->op.object,
@@ -817,14 +815,12 @@ int cachefiles_allocate_page(struct fscache_retrieval *op,
_enter("%p,{%lx},", object, page->index);
ret = cachefiles_has_space(cache, 0, 1);
- if (ret == 0) {
- pagevec_init(&pagevec, 0);
- pagevec_add(&pagevec, page);
- fscache_mark_pages_cached(op, &pagevec);
- } else {
+ if (ret == 0)
+ fscache_mark_page_cached(op, page);
+ else
ret = -ENOBUFS;
- }
+ fscache_retrieval_complete(op, 1);
_leave(" = %d", ret);
return ret;
}
@@ -874,6 +870,7 @@ int cachefiles_allocate_pages(struct fscache_retrieval *op,
ret = -ENOBUFS;
}
+ fscache_retrieval_complete(op, *nr_pages);
_leave(" = %d", ret);
return ret;
}
@@ -891,6 +888,7 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
struct cachefiles_cache *cache;
mm_segment_t old_fs;
struct file *file;
+ struct path path;
loff_t pos, eof;
size_t len;
void *data;
@@ -916,10 +914,9 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
/* write the page to the backing filesystem and let it store it in its
* own time */
- dget(object->backer);
- mntget(cache->mnt);
- file = dentry_open(object->backer, cache->mnt, O_RDWR,
- cache->cache_cred);
+ path.mnt = cache->mnt;
+ path.dentry = object->backer;
+ file = dentry_open(&path, O_RDWR | O_LARGEFILE, cache->cache_cred);
if (IS_ERR(file)) {
ret = PTR_ERR(file);
} else {
@@ -942,12 +939,14 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
}
data = kmap(page);
+ file_start_write(file);
old_fs = get_fs();
set_fs(KERNEL_DS);
ret = file->f_op->write(
file, (const void __user *) data, len, &pos);
set_fs(old_fs);
kunmap(page);
+ file_end_write(file);
if (ret != len)
ret = -EIO;
}
diff --git a/fs/cachefiles/security.c b/fs/cachefiles/security.c
index 039b5011d83..396c18ea276 100644
--- a/fs/cachefiles/security.c
+++ b/fs/cachefiles/security.c
@@ -34,9 +34,7 @@ int cachefiles_get_security_ID(struct cachefiles_cache *cache)
ret = set_security_override_from_ctx(new, cache->secctx);
if (ret < 0) {
put_cred(new);
- printk(KERN_ERR "CacheFiles:"
- " Security denies permission to nominate"
- " security context: error %d\n",
+ pr_err("Security denies permission to nominate security context: error %d\n",
ret);
goto error;
}
@@ -59,16 +57,14 @@ static int cachefiles_check_cache_dir(struct cachefiles_cache *cache,
ret = security_inode_mkdir(root->d_inode, root, 0);
if (ret < 0) {
- printk(KERN_ERR "CacheFiles:"
- " Security denies permission to make dirs: error %d",
+ pr_err("Security denies permission to make dirs: error %d",
ret);
return ret;
}
ret = security_inode_create(root->d_inode, root, 0);
if (ret < 0)
- printk(KERN_ERR "CacheFiles:"
- " Security denies permission to create files: error %d",
+ pr_err("Security denies permission to create files: error %d",
ret);
return ret;
diff --git a/fs/cachefiles/xattr.c b/fs/cachefiles/xattr.c
index e18b183b47e..1ad51ffbb27 100644
--- a/fs/cachefiles/xattr.c
+++ b/fs/cachefiles/xattr.c
@@ -51,7 +51,7 @@ int cachefiles_check_object_type(struct cachefiles_object *object)
}
if (ret != -EEXIST) {
- kerror("Can't set xattr on %*.*s [%lu] (err %d)",
+ pr_err("Can't set xattr on %*.*s [%lu] (err %d)",
dentry->d_name.len, dentry->d_name.len,
dentry->d_name.name, dentry->d_inode->i_ino,
-ret);
@@ -64,7 +64,7 @@ int cachefiles_check_object_type(struct cachefiles_object *object)
if (ret == -ERANGE)
goto bad_type_length;
- kerror("Can't read xattr on %*.*s [%lu] (err %d)",
+ pr_err("Can't read xattr on %*.*s [%lu] (err %d)",
dentry->d_name.len, dentry->d_name.len,
dentry->d_name.name, dentry->d_inode->i_ino,
-ret);
@@ -85,14 +85,14 @@ error:
return ret;
bad_type_length:
- kerror("Cache object %lu type xattr length incorrect",
+ pr_err("Cache object %lu type xattr length incorrect",
dentry->d_inode->i_ino);
ret = -EIO;
goto error;
bad_type:
xtype[2] = 0;
- kerror("Cache object %*.*s [%lu] type %s not %s",
+ pr_err("Cache object %*.*s [%lu] type %s not %s",
dentry->d_name.len, dentry->d_name.len,
dentry->d_name.name, dentry->d_inode->i_ino,
xtype, type);
@@ -109,13 +109,12 @@ int cachefiles_set_object_xattr(struct cachefiles_object *object,
struct dentry *dentry = object->dentry;
int ret;
- ASSERT(object->fscache.cookie);
ASSERT(dentry);
_enter("%p,#%d", object, auxdata->len);
/* attempt to install the cache metadata directly */
- _debug("SET %s #%u", object->fscache.cookie->def->name, auxdata->len);
+ _debug("SET #%u", auxdata->len);
ret = vfs_setxattr(dentry, cachefiles_xattr_cache,
&auxdata->type, auxdata->len,
@@ -138,13 +137,12 @@ int cachefiles_update_object_xattr(struct cachefiles_object *object,
struct dentry *dentry = object->dentry;
int ret;
- ASSERT(object->fscache.cookie);
ASSERT(dentry);
_enter("%p,#%d", object, auxdata->len);
/* attempt to install the cache metadata directly */
- _debug("SET %s #%u", object->fscache.cookie->def->name, auxdata->len);
+ _debug("SET #%u", auxdata->len);
ret = vfs_setxattr(dentry, cachefiles_xattr_cache,
&auxdata->type, auxdata->len,
@@ -159,6 +157,43 @@ int cachefiles_update_object_xattr(struct cachefiles_object *object,
}
/*
+ * check the consistency between the backing cache and the FS-Cache cookie
+ */
+int cachefiles_check_auxdata(struct cachefiles_object *object)
+{
+ struct cachefiles_xattr *auxbuf;
+ enum fscache_checkaux validity;
+ struct dentry *dentry = object->dentry;
+ ssize_t xlen;
+ int ret;
+
+ ASSERT(dentry);
+ ASSERT(dentry->d_inode);
+ ASSERT(object->fscache.cookie->def->check_aux);
+
+ auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, GFP_KERNEL);
+ if (!auxbuf)
+ return -ENOMEM;
+
+ xlen = vfs_getxattr(dentry, cachefiles_xattr_cache,
+ &auxbuf->type, 512 + 1);
+ ret = -ESTALE;
+ if (xlen < 1 ||
+ auxbuf->type != object->fscache.cookie->def->type)
+ goto error;
+
+ xlen--;
+ validity = fscache_check_aux(&object->fscache, &auxbuf->data, xlen);
+ if (validity != FSCACHE_CHECKAUX_OKAY)
+ goto error;
+
+ ret = 0;
+error:
+ kfree(auxbuf);
+ return ret;
+}
+
+/*
* check the state xattr on a cache file
* - return -ESTALE if the object should be deleted
*/
@@ -174,7 +209,7 @@ int cachefiles_check_object_xattr(struct cachefiles_object *object,
ASSERT(dentry);
ASSERT(dentry->d_inode);
- auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, GFP_KERNEL);
+ auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, cachefiles_gfp);
if (!auxbuf) {
_leave(" = -ENOMEM");
return -ENOMEM;
@@ -258,7 +293,7 @@ error:
return ret;
bad_type_length:
- kerror("Cache object %lu xattr length incorrect",
+ pr_err("Cache object %lu xattr length incorrect",
dentry->d_inode->i_ino);
ret = -EIO;
goto error;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 08:41:08 +0000