summaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
Diffstat (limited to 'fs')
-rw-r--r--fs/afs/flock.c4
-rw-r--r--fs/afs/inode.c13
-rw-r--r--fs/afs/vl_list.c4
-rw-r--r--fs/afs/yfsclient.c4
-rw-r--r--fs/dcache.c2
-rw-r--r--fs/debugfs/file.c87
-rw-r--r--fs/exec.c2
-rw-r--r--fs/file.c2
-rw-r--r--fs/jbd2/transaction.c4
-rw-r--r--fs/kernfs/dir.c105
-rw-r--r--fs/kernfs/file.c4
-rw-r--r--fs/kernfs/inode.c4
-rw-r--r--fs/kernfs/kernfs-internal.h2
-rw-r--r--fs/kernfs/mount.c102
-rw-r--r--fs/ocfs2/dlmglue.c2
-rw-r--r--fs/open.c6
-rw-r--r--fs/proc/stat.c56
17 files changed, 199 insertions, 204 deletions
diff --git a/fs/afs/flock.c b/fs/afs/flock.c
index d5e5a6ddc847..0f2a94ba73cb 100644
--- a/fs/afs/flock.c
+++ b/fs/afs/flock.c
@@ -346,8 +346,8 @@ again:
if (ret < 0) {
trace_afs_flock_ev(vnode, NULL, afs_flock_extend_fail,
ret);
- pr_warning("AFS: Failed to extend lock on {%llx:%llx} error %d\n",
- vnode->fid.vid, vnode->fid.vnode, ret);
+ pr_warn("AFS: Failed to extend lock on {%llx:%llx} error %d\n",
+ vnode->fid.vid, vnode->fid.vnode, ret);
}
spin_lock(&vnode->lock);
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 46d2d7cb461d..281470fe1183 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -34,8 +34,7 @@ static noinline void dump_vnode(struct afs_vnode *vnode, struct afs_vnode *paren
{
static unsigned long once_only;
- pr_warn("kAFS: AFS vnode with undefined type %u\n",
- vnode->status.type);
+ pr_warn("kAFS: AFS vnode with undefined type %u\n", vnode->status.type);
pr_warn("kAFS: A=%d m=%o s=%llx v=%llx\n",
vnode->status.abort_code,
vnode->status.mode,
@@ -175,11 +174,11 @@ static void afs_apply_status(struct afs_fs_cursor *fc,
BUG_ON(test_bit(AFS_VNODE_UNSET, &vnode->flags));
if (status->type != vnode->status.type) {
- pr_warning("Vnode %llx:%llx:%x changed type %u to %u\n",
- vnode->fid.vid,
- vnode->fid.vnode,
- vnode->fid.unique,
- status->type, vnode->status.type);
+ pr_warn("Vnode %llx:%llx:%x changed type %u to %u\n",
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ status->type, vnode->status.type);
afs_protocol_error(NULL, -EBADMSG, afs_eproto_bad_status);
return;
}
diff --git a/fs/afs/vl_list.c b/fs/afs/vl_list.c
index 21eb0c0be912..8fea54eba0c2 100644
--- a/fs/afs/vl_list.c
+++ b/fs/afs/vl_list.c
@@ -279,8 +279,8 @@ struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *cell,
struct afs_addr_list *old = addrs;
write_lock(&server->lock);
- rcu_swap_protected(server->addresses, old,
- lockdep_is_held(&server->lock));
+ old = rcu_replace_pointer(server->addresses, old,
+ lockdep_is_held(&server->lock));
write_unlock(&server->lock);
afs_put_addrlist(old);
}
diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c
index 3ee7abf4b2d0..9ac035c17dc4 100644
--- a/fs/afs/yfsclient.c
+++ b/fs/afs/yfsclient.c
@@ -152,8 +152,8 @@ static void yfs_check_req(struct afs_call *call, __be32 *bp)
pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
call->type->name, len, call->request_size);
else if (len < call->request_size)
- pr_warning("kAFS: %s: Request buffer underflow (%zu<%u)\n",
- call->type->name, len, call->request_size);
+ pr_warn("kAFS: %s: Request buffer underflow (%zu<%u)\n",
+ call->type->name, len, call->request_size);
}
/*
diff --git a/fs/dcache.c b/fs/dcache.c
index e88cf0554e65..f7931b682a0d 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1319,7 +1319,7 @@ resume:
if (!list_empty(&dentry->d_subdirs)) {
spin_unlock(&this_parent->d_lock);
- spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_);
+ spin_release(&dentry->d_lock.dep_map, _RET_IP_);
this_parent = dentry;
spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_);
goto repeat;
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 87846aad594b..dede25247b81 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -420,20 +420,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u8_wo, NULL, debugfs_u8_set, "%llu\n");
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
- *
- * This function will return a pointer to a dentry if it succeeds. This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
- * be returned.
*/
-struct dentry *debugfs_create_u8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value)
+void debugfs_create_u8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8,
&fops_u8_ro, &fops_u8_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u8);
@@ -465,20 +456,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u16_wo, NULL, debugfs_u16_set, "%llu\n");
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
- *
- * This function will return a pointer to a dentry if it succeeds. This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
- * be returned.
*/
-struct dentry *debugfs_create_u16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value)
+void debugfs_create_u16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u16,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u16,
&fops_u16_ro, &fops_u16_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u16);
@@ -556,20 +538,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n");
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
- *
- * This function will return a pointer to a dentry if it succeeds. This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
- * be returned.
*/
-struct dentry *debugfs_create_u64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value)
+void debugfs_create_u64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64,
&fops_u64_ro, &fops_u64_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u64);
@@ -660,10 +633,10 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_x64_wo, NULL, debugfs_u64_set, "0x%016llx\n");
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value)
+void debugfs_create_x8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x8,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x8,
&fops_x8_ro, &fops_x8_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x8);
@@ -678,10 +651,10 @@ EXPORT_SYMBOL_GPL(debugfs_create_x8);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value)
+void debugfs_create_x16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x16,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x16,
&fops_x16_ro, &fops_x16_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x16);
@@ -696,10 +669,10 @@ EXPORT_SYMBOL_GPL(debugfs_create_x16);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x32(const char *name, umode_t mode,
- struct dentry *parent, u32 *value)
+void debugfs_create_x32(const char *name, umode_t mode, struct dentry *parent,
+ u32 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x32,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x32,
&fops_x32_ro, &fops_x32_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x32);
@@ -714,10 +687,10 @@ EXPORT_SYMBOL_GPL(debugfs_create_x32);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value)
+void debugfs_create_x64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x64,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x64,
&fops_x64_ro, &fops_x64_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x64);
@@ -748,12 +721,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_size_t_wo, NULL, debugfs_size_t_set, "%llu\n");
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
- struct dentry *parent, size_t *value)
+void debugfs_create_size_t(const char *name, umode_t mode,
+ struct dentry *parent, size_t *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value,
- &fops_size_t, &fops_size_t_ro,
- &fops_size_t_wo);
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_size_t,
+ &fops_size_t_ro, &fops_size_t_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_size_t);
@@ -785,12 +757,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t_wo, NULL, debugfs_atomic_t_set,
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
- struct dentry *parent, atomic_t *value)
+void debugfs_create_atomic_t(const char *name, umode_t mode,
+ struct dentry *parent, atomic_t *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value,
- &fops_atomic_t, &fops_atomic_t_ro,
- &fops_atomic_t_wo);
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_atomic_t,
+ &fops_atomic_t_ro, &fops_atomic_t_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_atomic_t);
diff --git a/fs/exec.c b/fs/exec.c
index 555e93c7dec8..c27231234764 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1015,7 +1015,7 @@ static int exec_mmap(struct mm_struct *mm)
/* Notify parent that we're no longer interested in the old VM */
tsk = current;
old_mm = current->mm;
- mm_release(tsk, old_mm);
+ exec_mm_release(tsk, old_mm);
if (old_mm) {
sync_mm_rss(old_mm);
diff --git a/fs/file.c b/fs/file.c
index b241ea7f1aa4..3da91a112bab 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -795,7 +795,7 @@ unsigned long __fdget_pos(unsigned int fd)
unsigned long v = __fdget(fd);
struct file *file = (struct file *)(v & ~3);
- if (file && !(file->f_mode & FMODE_STREAM)) {
+ if (file && (file->f_mode & FMODE_ATOMIC_POS)) {
if (file_count(file) > 1) {
v |= FDPUT_POS_UNLOCK;
mutex_lock(&file->f_pos_lock);
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index bee8498d7792..b25ebdcabfa3 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -713,7 +713,7 @@ int jbd2__journal_restart(handle_t *handle, int nblocks, gfp_t gfp_mask)
if (need_to_start)
jbd2_log_start_commit(journal, tid);
- rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_);
+ rwsem_release(&journal->j_trans_commit_map, _THIS_IP_);
handle->h_buffer_credits = nblocks;
/*
* Restore the original nofs context because the journal restart
@@ -1848,7 +1848,7 @@ int jbd2_journal_stop(handle_t *handle)
wake_up(&journal->j_wait_transaction_locked);
}
- rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_);
+ rwsem_release(&journal->j_trans_commit_map, _THIS_IP_);
if (wait_for_commit)
err = jbd2_log_wait_commit(journal, tid);
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 6ebae6bbe6a5..9d96e6871e1a 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -438,7 +438,7 @@ void kernfs_put_active(struct kernfs_node *kn)
return;
if (kernfs_lockdep(kn))
- rwsem_release(&kn->dep_map, 1, _RET_IP_);
+ rwsem_release(&kn->dep_map, _RET_IP_);
v = atomic_dec_return(&kn->active);
if (likely(v != KN_DEACTIVATED_BIAS))
return;
@@ -476,7 +476,7 @@ static void kernfs_drain(struct kernfs_node *kn)
if (kernfs_lockdep(kn)) {
lock_acquired(&kn->dep_map, _RET_IP_);
- rwsem_release(&kn->dep_map, 1, _RET_IP_);
+ rwsem_release(&kn->dep_map, _RET_IP_);
}
kernfs_drain_open_files(kn);
@@ -508,10 +508,6 @@ void kernfs_put(struct kernfs_node *kn)
struct kernfs_node *parent;
struct kernfs_root *root;
- /*
- * kernfs_node is freed with ->count 0, kernfs_find_and_get_node_by_ino
- * depends on this to filter reused stale node
- */
if (!kn || !atomic_dec_and_test(&kn->count))
return;
root = kernfs_root(kn);
@@ -536,7 +532,7 @@ void kernfs_put(struct kernfs_node *kn)
kmem_cache_free(kernfs_iattrs_cache, kn->iattr);
}
spin_lock(&kernfs_idr_lock);
- idr_remove(&root->ino_idr, kn->id.ino);
+ idr_remove(&root->ino_idr, (u32)kernfs_ino(kn));
spin_unlock(&kernfs_idr_lock);
kmem_cache_free(kernfs_node_cache, kn);
@@ -621,8 +617,7 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root,
unsigned flags)
{
struct kernfs_node *kn;
- u32 gen;
- int cursor;
+ u32 id_highbits;
int ret;
name = kstrdup_const(name, GFP_KERNEL);
@@ -635,23 +630,19 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root,
idr_preload(GFP_KERNEL);
spin_lock(&kernfs_idr_lock);
- cursor = idr_get_cursor(&root->ino_idr);
ret = idr_alloc_cyclic(&root->ino_idr, kn, 1, 0, GFP_ATOMIC);
- if (ret >= 0 && ret < cursor)
- root->next_generation++;
- gen = root->next_generation;
+ if (ret >= 0 && ret < root->last_id_lowbits)
+ root->id_highbits++;
+ id_highbits = root->id_highbits;
+ root->last_id_lowbits = ret;
spin_unlock(&kernfs_idr_lock);
idr_preload_end();
if (ret < 0)
goto err_out2;
- kn->id.ino = ret;
- kn->id.generation = gen;
- /*
- * set ino first. This RELEASE is paired with atomic_inc_not_zero in
- * kernfs_find_and_get_node_by_ino
- */
- atomic_set_release(&kn->count, 1);
+ kn->id = (u64)id_highbits << 32 | ret;
+
+ atomic_set(&kn->count, 1);
atomic_set(&kn->active, KN_DEACTIVATED_BIAS);
RB_CLEAR_NODE(&kn->rb);
@@ -680,7 +671,7 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root,
return kn;
err_out3:
- idr_remove(&root->ino_idr, kn->id.ino);
+ idr_remove(&root->ino_idr, (u32)kernfs_ino(kn));
err_out2:
kmem_cache_free(kernfs_node_cache, kn);
err_out1:
@@ -705,50 +696,52 @@ struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,
}
/*
- * kernfs_find_and_get_node_by_ino - get kernfs_node from inode number
+ * kernfs_find_and_get_node_by_id - get kernfs_node from node id
* @root: the kernfs root
- * @ino: inode number
+ * @id: the target node id
+ *
+ * @id's lower 32bits encode ino and upper gen. If the gen portion is
+ * zero, all generations are matched.
*
* RETURNS:
* NULL on failure. Return a kernfs node with reference counter incremented
*/
-struct kernfs_node *kernfs_find_and_get_node_by_ino(struct kernfs_root *root,
- unsigned int ino)
+struct kernfs_node *kernfs_find_and_get_node_by_id(struct kernfs_root *root,
+ u64 id)
{
struct kernfs_node *kn;
+ ino_t ino = kernfs_id_ino(id);
+ u32 gen = kernfs_id_gen(id);
- rcu_read_lock();
- kn = idr_find(&root->ino_idr, ino);
+ spin_lock(&kernfs_idr_lock);
+
+ kn = idr_find(&root->ino_idr, (u32)ino);
if (!kn)
- goto out;
+ goto err_unlock;
- /*
- * Since kernfs_node is freed in RCU, it's possible an old node for ino
- * is freed, but reused before RCU grace period. But a freed node (see
- * kernfs_put) or an incompletedly initialized node (see
- * __kernfs_new_node) should have 'count' 0. We can use this fact to
- * filter out such node.
- */
- if (!atomic_inc_not_zero(&kn->count)) {
- kn = NULL;
- goto out;
+ if (sizeof(ino_t) >= sizeof(u64)) {
+ /* we looked up with the low 32bits, compare the whole */
+ if (kernfs_ino(kn) != ino)
+ goto err_unlock;
+ } else {
+ /* 0 matches all generations */
+ if (unlikely(gen && kernfs_gen(kn) != gen))
+ goto err_unlock;
}
/*
- * The node could be a new node or a reused node. If it's a new node,
- * we are ok. If it's reused because of RCU (because of
- * SLAB_TYPESAFE_BY_RCU), the __kernfs_new_node always sets its 'ino'
- * before 'count'. So if 'count' is uptodate, 'ino' should be uptodate,
- * hence we can use 'ino' to filter stale node.
+ * ACTIVATED is protected with kernfs_mutex but it was clear when
+ * @kn was added to idr and we just wanna see it set. No need to
+ * grab kernfs_mutex.
*/
- if (kn->id.ino != ino)
- goto out;
- rcu_read_unlock();
+ if (unlikely(!(kn->flags & KERNFS_ACTIVATED) ||
+ !atomic_inc_not_zero(&kn->count)))
+ goto err_unlock;
+ spin_unlock(&kernfs_idr_lock);
return kn;
-out:
- rcu_read_unlock();
- kernfs_put(kn);
+err_unlock:
+ spin_unlock(&kernfs_idr_lock);
return NULL;
}
@@ -962,7 +955,17 @@ struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops,
idr_init(&root->ino_idr);
INIT_LIST_HEAD(&root->supers);
- root->next_generation = 1;
+
+ /*
+ * On 64bit ino setups, id is ino. On 32bit, low 32bits are ino.
+ * High bits generation. The starting value for both ino and
+ * genenration is 1. Initialize upper 32bit allocation
+ * accordingly.
+ */
+ if (sizeof(ino_t) >= sizeof(u64))
+ root->id_highbits = 0;
+ else
+ root->id_highbits = 1;
kn = __kernfs_new_node(root, NULL, "", S_IFDIR | S_IRUGO | S_IXUGO,
GLOBAL_ROOT_UID, GLOBAL_ROOT_GID,
@@ -1678,7 +1681,7 @@ static int kernfs_fop_readdir(struct file *file, struct dir_context *ctx)
const char *name = pos->name;
unsigned int type = dt_type(pos);
int len = strlen(name);
- ino_t ino = pos->id.ino;
+ ino_t ino = kernfs_ino(pos);
ctx->pos = pos->hash;
file->private_data = pos;
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index e8c792b49616..34366db3620d 100644
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -892,7 +892,7 @@ repeat:
* have the matching @file available. Look up the inodes
* and generate the events manually.
*/
- inode = ilookup(info->sb, kn->id.ino);
+ inode = ilookup(info->sb, kernfs_ino(kn));
if (!inode)
continue;
@@ -901,7 +901,7 @@ repeat:
if (parent) {
struct inode *p_inode;
- p_inode = ilookup(info->sb, parent->id.ino);
+ p_inode = ilookup(info->sb, kernfs_ino(parent));
if (p_inode) {
fsnotify(p_inode, FS_MODIFY | FS_EVENT_ON_CHILD,
inode, FSNOTIFY_EVENT_INODE, &name, 0);
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index f3eaa8869f42..eac277c63d42 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -201,7 +201,7 @@ static void kernfs_init_inode(struct kernfs_node *kn, struct inode *inode)
inode->i_private = kn;
inode->i_mapping->a_ops = &kernfs_aops;
inode->i_op = &kernfs_iops;
- inode->i_generation = kn->id.generation;
+ inode->i_generation = kernfs_gen(kn);
set_default_inode_attr(inode, kn->mode);
kernfs_refresh_inode(kn, inode);
@@ -247,7 +247,7 @@ struct inode *kernfs_get_inode(struct super_block *sb, struct kernfs_node *kn)
{
struct inode *inode;
- inode = iget_locked(sb, kn->id.ino);
+ inode = iget_locked(sb, kernfs_ino(kn));
if (inode && (inode->i_state & I_NEW))
kernfs_init_inode(kn, inode);
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index 02ce570a9a3c..2f3c51d55261 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -109,8 +109,6 @@ struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,
const char *name, umode_t mode,
kuid_t uid, kgid_t gid,
unsigned flags);
-struct kernfs_node *kernfs_find_and_get_node_by_ino(struct kernfs_root *root,
- unsigned int ino);
/*
* file.c
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index 6c12fac2c287..4d31503abaee 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -53,63 +53,85 @@ const struct super_operations kernfs_sops = {
.show_path = kernfs_sop_show_path,
};
-/*
- * Similar to kernfs_fh_get_inode, this one gets kernfs node from inode
- * number and generation
- */
-struct kernfs_node *kernfs_get_node_by_id(struct kernfs_root *root,
- const union kernfs_node_id *id)
+static int kernfs_encode_fh(struct inode *inode, __u32 *fh, int *max_len,
+ struct inode *parent)
{
- struct kernfs_node *kn;
+ struct kernfs_node *kn = inode->i_private;
- kn = kernfs_find_and_get_node_by_ino(root, id->ino);
- if (!kn)
- return NULL;
- if (kn->id.generation != id->generation) {
- kernfs_put(kn);
- return NULL;
+ if (*max_len < 2) {
+ *max_len = 2;
+ return FILEID_INVALID;
}
- return kn;
+
+ *max_len = 2;
+ *(u64 *)fh = kn->id;
+ return FILEID_KERNFS;
}
-static struct inode *kernfs_fh_get_inode(struct super_block *sb,
- u64 ino, u32 generation)
+static struct dentry *__kernfs_fh_to_dentry(struct super_block *sb,
+ struct fid *fid, int fh_len,
+ int fh_type, bool get_parent)
{
struct kernfs_super_info *info = kernfs_info(sb);
- struct inode *inode;
struct kernfs_node *kn;
+ struct inode *inode;
+ u64 id;
- if (ino == 0)
- return ERR_PTR(-ESTALE);
+ if (fh_len < 2)
+ return NULL;
+
+ switch (fh_type) {
+ case FILEID_KERNFS:
+ id = *(u64 *)fid;
+ break;
+ case FILEID_INO32_GEN:
+ case FILEID_INO32_GEN_PARENT:
+ /*
+ * blk_log_action() exposes "LOW32,HIGH32" pair without
+ * type and userland can call us with generic fid
+ * constructed from them. Combine it back to ID. See
+ * blk_log_action().
+ */
+ id = ((u64)fid->i32.gen << 32) | fid->i32.ino;
+ break;
+ default:
+ return NULL;
+ }
- kn = kernfs_find_and_get_node_by_ino(info->root, ino);
+ kn = kernfs_find_and_get_node_by_id(info->root, id);
if (!kn)
return ERR_PTR(-ESTALE);
+
+ if (get_parent) {
+ struct kernfs_node *parent;
+
+ parent = kernfs_get_parent(kn);
+ kernfs_put(kn);
+ kn = parent;
+ if (!kn)
+ return ERR_PTR(-ESTALE);
+ }
+
inode = kernfs_get_inode(sb, kn);
kernfs_put(kn);
if (!inode)
return ERR_PTR(-ESTALE);
- if (generation && inode->i_generation != generation) {
- /* we didn't find the right inode.. */
- iput(inode);
- return ERR_PTR(-ESTALE);
- }
- return inode;
+ return d_obtain_alias(inode);
}
-static struct dentry *kernfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
- int fh_len, int fh_type)
+static struct dentry *kernfs_fh_to_dentry(struct super_block *sb,
+ struct fid *fid, int fh_len,
+ int fh_type)
{
- return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
- kernfs_fh_get_inode);
+ return __kernfs_fh_to_dentry(sb, fid, fh_len, fh_type, false);
}
-static struct dentry *kernfs_fh_to_parent(struct super_block *sb, struct fid *fid,
- int fh_len, int fh_type)
+static struct dentry *kernfs_fh_to_parent(struct super_block *sb,
+ struct fid *fid, int fh_len,
+ int fh_type)
{
- return generic_fh_to_parent(sb, fid, fh_len, fh_type,
- kernfs_fh_get_inode);
+ return __kernfs_fh_to_dentry(sb, fid, fh_len, fh_type, true);
}
static struct dentry *kernfs_get_parent_dentry(struct dentry *child)
@@ -120,6 +142,7 @@ static struct dentry *kernfs_get_parent_dentry(struct dentry *child)
}
static const struct export_operations kernfs_export_ops = {
+ .encode_fh = kernfs_encode_fh,
.fh_to_dentry = kernfs_fh_to_dentry,
.fh_to_parent = kernfs_fh_to_parent,
.get_parent = kernfs_get_parent_dentry,
@@ -363,18 +386,9 @@ void kernfs_kill_sb(struct super_block *sb)
void __init kernfs_init(void)
{
-
- /*
- * the slab is freed in RCU context, so kernfs_find_and_get_node_by_ino
- * can access the slab lock free. This could introduce stale nodes,
- * please see how kernfs_find_and_get_node_by_ino filters out stale
- * nodes.
- */
kernfs_node_cache = kmem_cache_create("kernfs_node_cache",
sizeof(struct kernfs_node),
- 0,
- SLAB_PANIC | SLAB_TYPESAFE_BY_RCU,
- NULL);
+ 0, SLAB_PANIC, NULL);
/* Creates slab cache for kernfs inode attributes */
kernfs_iattrs_cache = kmem_cache_create("kernfs_iattrs_cache",
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 6e774c5ea13b..1c4c51f3df60 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -1687,7 +1687,7 @@ static void __ocfs2_cluster_unlock(struct ocfs2_super *osb,
spin_unlock_irqrestore(&lockres->l_lock, flags);
#ifdef CONFIG_DEBUG_LOCK_ALLOC
if (lockres->l_lockdep_map.key != NULL)
- rwsem_release(&lockres->l_lockdep_map, 1, caller_ip);
+ rwsem_release(&lockres->l_lockdep_map, caller_ip);
#endif
}
diff --git a/fs/open.c b/fs/open.c
index 5c68282ea79e..b62f5c0923a8 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -771,6 +771,10 @@ static int do_dentry_open(struct file *f,
f->f_mode |= FMODE_WRITER;
}
+ /* POSIX.1-2008/SUSv4 Section XSI 2.9.7 */
+ if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))
+ f->f_mode |= FMODE_ATOMIC_POS;
+
f->f_op = fops_get(inode->i_fop);
if (WARN_ON(!f->f_op)) {
error = -ENODEV;
@@ -1252,7 +1256,7 @@ EXPORT_SYMBOL(nonseekable_open);
*/
int stream_open(struct inode *inode, struct file *filp)
{
- filp->f_mode &= ~(FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE);
+ filp->f_mode &= ~(FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE | FMODE_ATOMIC_POS);
filp->f_mode |= FMODE_STREAM;
return 0;
}
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 80c305f206bb..37bdbec5b402 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -120,20 +120,23 @@ static int show_stat(struct seq_file *p, void *v)
getboottime64(&boottime);
for_each_possible_cpu(i) {
- struct kernel_cpustat *kcs = &kcpustat_cpu(i);
-
- user += kcs->cpustat[CPUTIME_USER];
- nice += kcs->cpustat[CPUTIME_NICE];
- system += kcs->cpustat[CPUTIME_SYSTEM];
- idle += get_idle_time(kcs, i);
- iowait += get_iowait_time(kcs, i);
- irq += kcs->cpustat[CPUTIME_IRQ];
- softirq += kcs->cpustat[CPUTIME_SOFTIRQ];
- steal += kcs->cpustat[CPUTIME_STEAL];
- guest += kcs->cpustat[CPUTIME_GUEST];
- guest_nice += kcs->cpustat[CPUTIME_GUEST_NICE];
- sum += kstat_cpu_irqs_sum(i);
- sum += arch_irq_stat_cpu(i);
+ struct kernel_cpustat kcpustat;
+ u64 *cpustat = kcpustat.cpustat;
+
+ kcpustat_cpu_fetch(&kcpustat, i);
+
+ user += cpustat[CPUTIME_USER];
+ nice += cpustat[CPUTIME_NICE];
+ system += cpustat[CPUTIME_SYSTEM];
+ idle += get_idle_time(&kcpustat, i);
+ iowait += get_iowait_time(&kcpustat, i);
+ irq += cpustat[CPUTIME_IRQ];
+ softirq += cpustat[CPUTIME_SOFTIRQ];
+ steal += cpustat[CPUTIME_STEAL];
+ guest += cpustat[CPUTIME_GUEST];
+ guest_nice += cpustat[CPUTIME_USER];
+ sum += kstat_cpu_irqs_sum(i);
+ sum += arch_irq_stat_cpu(i);
for (j = 0; j < NR_SOFTIRQS; j++) {
unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
@@ -157,19 +160,22 @@ static int show_stat(struct seq_file *p, void *v)
seq_putc(p, '\n');
for_each_online_cpu(i) {
- struct kernel_cpustat *kcs = &kcpustat_cpu(i);
+ struct kernel_cpustat kcpustat;
+ u64 *cpustat = kcpustat.cpustat;
+
+ kcpustat_cpu_fetch(&kcpustat, i);
/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
- user = kcs->cpustat[CPUTIME_USER];
- nice = kcs->cpustat[CPUTIME_NICE];
- system = kcs->cpustat[CPUTIME_SYSTEM];
- idle = get_idle_time(kcs, i);
- iowait = get_iowait_time(kcs, i);
- irq = kcs->cpustat[CPUTIME_IRQ];
- softirq = kcs->cpustat[CPUTIME_SOFTIRQ];
- steal = kcs->cpustat[CPUTIME_STEAL];
- guest = kcs->cpustat[CPUTIME_GUEST];
- guest_nice = kcs->cpustat[CPUTIME_GUEST_NICE];
+ user = cpustat[CPUTIME_USER];
+ nice = cpustat[CPUTIME_NICE];
+ system = cpustat[CPUTIME_SYSTEM];
+ idle = get_idle_time(&kcpustat, i);
+ iowait = get_iowait_time(&kcpustat, i);
+ irq = cpustat[CPUTIME_IRQ];
+ softirq = cpustat[CPUTIME_SOFTIRQ];
+ steal = cpustat[CPUTIME_STEAL];
+ guest = cpustat[CPUTIME_GUEST];
+ guest_nice = cpustat[CPUTIME_USER];
seq_printf(p, "cpu%d", i);
seq_put_decimal_ull(p, " ", nsec_to_clock_t(user));
seq_put_decimal_ull(p, " ", nsec_to_clock_t(nice));
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-31 18:13:03 +0000