summaryrefslogtreecommitdiff
path: root/fs
diff options
context:
space:
mode:
Diffstat (limited to 'fs')
-rw-r--r--fs/buffer.c10
-rw-r--r--fs/dcache.c32
-rw-r--r--fs/eventfd.c127
-rw-r--r--fs/file.c5
-rw-r--r--fs/file_table.c1
-rw-r--r--fs/jffs2/fs.c1
-rw-r--r--fs/namei.c71
-rw-r--r--fs/nfs/nfs4file.c1
-rw-r--r--fs/super.c2
9 files changed, 74 insertions, 176 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 8b26295a56fe..9a73924db22f 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -53,13 +53,6 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
#define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)
-void init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private)
-{
- bh->b_end_io = handler;
- bh->b_private = private;
-}
-EXPORT_SYMBOL(init_buffer);
-
inline void touch_buffer(struct buffer_head *bh)
{
trace_block_touch_buffer(bh);
@@ -922,7 +915,8 @@ init_page_buffers(struct page *page, struct block_device *bdev,
do {
if (!buffer_mapped(bh)) {
- init_buffer(bh, NULL, NULL);
+ bh->b_end_io = NULL;
+ bh->b_private = NULL;
bh->b_bdev = bdev;
bh->b_blocknr = block;
if (uptodate)
diff --git a/fs/dcache.c b/fs/dcache.c
index 379dce86f001..c6d996ee2d61 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -32,7 +32,6 @@
#include <linux/swap.h>
#include <linux/bootmem.h>
#include <linux/fs_struct.h>
-#include <linux/hardirq.h>
#include <linux/bit_spinlock.h>
#include <linux/rculist_bl.h>
#include <linux/prefetch.h>
@@ -49,8 +48,8 @@
* - i_dentry, d_u.d_alias, d_inode of aliases
* dcache_hash_bucket lock protects:
* - the dcache hash table
- * s_anon bl list spinlock protects:
- * - the s_anon list (see __d_drop)
+ * s_roots bl list spinlock protects:
+ * - the s_roots list (see __d_drop)
* dentry->d_sb->s_dentry_lru_lock protects:
* - the dcache lru lists and counters
* d_lock protects:
@@ -68,7 +67,7 @@
* dentry->d_lock
* dentry->d_sb->s_dentry_lru_lock
* dcache_hash_bucket lock
- * s_anon lock
+ * s_roots lock
*
* If there is an ancestor relationship:
* dentry->d_parent->...->d_parent->d_lock
@@ -104,14 +103,13 @@ EXPORT_SYMBOL(slash_name);
* information, yet avoid using a prime hash-size or similar.
*/
-static unsigned int d_hash_mask __read_mostly;
static unsigned int d_hash_shift __read_mostly;
static struct hlist_bl_head *dentry_hashtable __read_mostly;
static inline struct hlist_bl_head *d_hash(unsigned int hash)
{
- return dentry_hashtable + (hash >> (32 - d_hash_shift));
+ return dentry_hashtable + (hash >> d_hash_shift);
}
#define IN_LOOKUP_SHIFT 10
@@ -477,10 +475,10 @@ void __d_drop(struct dentry *dentry)
/*
* Hashed dentries are normally on the dentry hashtable,
* with the exception of those newly allocated by
- * d_obtain_alias, which are always IS_ROOT:
+ * d_obtain_root, which are always IS_ROOT:
*/
if (unlikely(IS_ROOT(dentry)))
- b = &dentry->d_sb->s_anon;
+ b = &dentry->d_sb->s_roots;
else
b = d_hash(dentry->d_name.hash);
@@ -1500,8 +1498,8 @@ void shrink_dcache_for_umount(struct super_block *sb)
sb->s_root = NULL;
do_one_tree(dentry);
- while (!hlist_bl_empty(&sb->s_anon)) {
- dentry = dget(hlist_bl_entry(hlist_bl_first(&sb->s_anon), struct dentry, d_hash));
+ while (!hlist_bl_empty(&sb->s_roots)) {
+ dentry = dget(hlist_bl_entry(hlist_bl_first(&sb->s_roots), struct dentry, d_hash));
do_one_tree(dentry);
}
}
@@ -1964,9 +1962,11 @@ static struct dentry *__d_obtain_alias(struct inode *inode, int disconnected)
spin_lock(&tmp->d_lock);
__d_set_inode_and_type(tmp, inode, add_flags);
hlist_add_head(&tmp->d_u.d_alias, &inode->i_dentry);
- hlist_bl_lock(&tmp->d_sb->s_anon);
- hlist_bl_add_head(&tmp->d_hash, &tmp->d_sb->s_anon);
- hlist_bl_unlock(&tmp->d_sb->s_anon);
+ if (!disconnected) {
+ hlist_bl_lock(&tmp->d_sb->s_roots);
+ hlist_bl_add_head(&tmp->d_hash, &tmp->d_sb->s_roots);
+ hlist_bl_unlock(&tmp->d_sb->s_roots);
+ }
spin_unlock(&tmp->d_lock);
spin_unlock(&inode->i_lock);
@@ -3585,9 +3585,10 @@ static void __init dcache_init_early(void)
13,
HASH_EARLY | HASH_ZERO,
&d_hash_shift,
- &d_hash_mask,
+ NULL,
0,
0);
+ d_hash_shift = 32 - d_hash_shift;
}
static void __init dcache_init(void)
@@ -3611,9 +3612,10 @@ static void __init dcache_init(void)
13,
HASH_ZERO,
&d_hash_shift,
- &d_hash_mask,
+ NULL,
0,
0);
+ d_hash_shift = 32 - d_hash_shift;
}
/* SLAB cache for __getname() consumers */
diff --git a/fs/eventfd.c b/fs/eventfd.c
index 6318a9b57e53..04fd824142a1 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -80,24 +80,11 @@ static void eventfd_free(struct kref *kref)
}
/**
- * eventfd_ctx_get - Acquires a reference to the internal eventfd context.
- * @ctx: [in] Pointer to the eventfd context.
- *
- * Returns: In case of success, returns a pointer to the eventfd context.
- */
-struct eventfd_ctx *eventfd_ctx_get(struct eventfd_ctx *ctx)
-{
- kref_get(&ctx->kref);
- return ctx;
-}
-EXPORT_SYMBOL_GPL(eventfd_ctx_get);
-
-/**
* eventfd_ctx_put - Releases a reference to the internal eventfd context.
* @ctx: [in] Pointer to eventfd context.
*
* The eventfd context reference must have been previously acquired either
- * with eventfd_ctx_get() or eventfd_ctx_fdget().
+ * with eventfd_ctx_fdget() or eventfd_ctx_fileget().
*/
void eventfd_ctx_put(struct eventfd_ctx *ctx)
{
@@ -207,36 +194,27 @@ int eventfd_ctx_remove_wait_queue(struct eventfd_ctx *ctx, wait_queue_entry_t *w
}
EXPORT_SYMBOL_GPL(eventfd_ctx_remove_wait_queue);
-/**
- * eventfd_ctx_read - Reads the eventfd counter or wait if it is zero.
- * @ctx: [in] Pointer to eventfd context.
- * @no_wait: [in] Different from zero if the operation should not block.
- * @cnt: [out] Pointer to the 64-bit counter value.
- *
- * Returns %0 if successful, or the following error codes:
- *
- * - -EAGAIN : The operation would have blocked but @no_wait was non-zero.
- * - -ERESTARTSYS : A signal interrupted the wait operation.
- *
- * If @no_wait is zero, the function might sleep until the eventfd internal
- * counter becomes greater than zero.
- */
-ssize_t eventfd_ctx_read(struct eventfd_ctx *ctx, int no_wait, __u64 *cnt)
+static ssize_t eventfd_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
{
+ struct eventfd_ctx *ctx = file->private_data;
ssize_t res;
+ __u64 ucnt = 0;
DECLARE_WAITQUEUE(wait, current);
+ if (count < sizeof(ucnt))
+ return -EINVAL;
+
spin_lock_irq(&ctx->wqh.lock);
- *cnt = 0;
res = -EAGAIN;
if (ctx->count > 0)
- res = 0;
- else if (!no_wait) {
+ res = sizeof(ucnt);
+ else if (!(file->f_flags & O_NONBLOCK)) {
__add_wait_queue(&ctx->wqh, &wait);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (ctx->count > 0) {
- res = 0;
+ res = sizeof(ucnt);
break;
}
if (signal_pending(current)) {
@@ -250,31 +228,17 @@ ssize_t eventfd_ctx_read(struct eventfd_ctx *ctx, int no_wait, __u64 *cnt)
__remove_wait_queue(&ctx->wqh, &wait);
__set_current_state(TASK_RUNNING);
}
- if (likely(res == 0)) {
- eventfd_ctx_do_read(ctx, cnt);
+ if (likely(res > 0)) {
+ eventfd_ctx_do_read(ctx, &ucnt);
if (waitqueue_active(&ctx->wqh))
wake_up_locked_poll(&ctx->wqh, POLLOUT);
}
spin_unlock_irq(&ctx->wqh.lock);
- return res;
-}
-EXPORT_SYMBOL_GPL(eventfd_ctx_read);
-
-static ssize_t eventfd_read(struct file *file, char __user *buf, size_t count,
- loff_t *ppos)
-{
- struct eventfd_ctx *ctx = file->private_data;
- ssize_t res;
- __u64 cnt;
-
- if (count < sizeof(cnt))
- return -EINVAL;
- res = eventfd_ctx_read(ctx, file->f_flags & O_NONBLOCK, &cnt);
- if (res < 0)
- return res;
+ if (res > 0 && put_user(ucnt, (__u64 __user *)buf))
+ return -EFAULT;
- return put_user(cnt, (__u64 __user *) buf) ? -EFAULT : sizeof(cnt);
+ return res;
}
static ssize_t eventfd_write(struct file *file, const char __user *buf, size_t count,
@@ -405,79 +369,44 @@ EXPORT_SYMBOL_GPL(eventfd_ctx_fdget);
*/
struct eventfd_ctx *eventfd_ctx_fileget(struct file *file)
{
+ struct eventfd_ctx *ctx;
+
if (file->f_op != &eventfd_fops)
return ERR_PTR(-EINVAL);
- return eventfd_ctx_get(file->private_data);
+ ctx = file->private_data;
+ kref_get(&ctx->kref);
+ return ctx;
}
EXPORT_SYMBOL_GPL(eventfd_ctx_fileget);
-/**
- * eventfd_file_create - Creates an eventfd file pointer.
- * @count: Initial eventfd counter value.
- * @flags: Flags for the eventfd file.
- *
- * This function creates an eventfd file pointer, w/out installing it into
- * the fd table. This is useful when the eventfd file is used during the
- * initialization of data structures that require extra setup after the eventfd
- * creation. So the eventfd creation is split into the file pointer creation
- * phase, and the file descriptor installation phase.
- * In this way races with userspace closing the newly installed file descriptor
- * can be avoided.
- * Returns an eventfd file pointer, or a proper error pointer.
- */
-struct file *eventfd_file_create(unsigned int count, int flags)
+SYSCALL_DEFINE2(eventfd2, unsigned int, count, int, flags)
{
- struct file *file;
struct eventfd_ctx *ctx;
+ int fd;
/* Check the EFD_* constants for consistency. */
BUILD_BUG_ON(EFD_CLOEXEC != O_CLOEXEC);
BUILD_BUG_ON(EFD_NONBLOCK != O_NONBLOCK);
if (flags & ~EFD_FLAGS_SET)
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
kref_init(&ctx->kref);
init_waitqueue_head(&ctx->wqh);
ctx->count = count;
ctx->flags = flags;
- file = anon_inode_getfile("[eventfd]", &eventfd_fops, ctx,
- O_RDWR | (flags & EFD_SHARED_FCNTL_FLAGS));
- if (IS_ERR(file))
+ fd = anon_inode_getfd("[eventfd]", &eventfd_fops, ctx,
+ O_RDWR | (flags & EFD_SHARED_FCNTL_FLAGS));
+ if (fd < 0)
eventfd_free_ctx(ctx);
- return file;
-}
-
-SYSCALL_DEFINE2(eventfd2, unsigned int, count, int, flags)
-{
- int fd, error;
- struct file *file;
-
- error = get_unused_fd_flags(flags & EFD_SHARED_FCNTL_FLAGS);
- if (error < 0)
- return error;
- fd = error;
-
- file = eventfd_file_create(count, flags);
- if (IS_ERR(file)) {
- error = PTR_ERR(file);
- goto err_put_unused_fd;
- }
- fd_install(fd, file);
-
return fd;
-
-err_put_unused_fd:
- put_unused_fd(fd);
-
- return error;
}
SYSCALL_DEFINE1(eventfd, unsigned int, count)
diff --git a/fs/file.c b/fs/file.c
index fc0eeb812e2c..42f0db4bd0fb 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -11,18 +11,13 @@
#include <linux/export.h>
#include <linux/fs.h>
#include <linux/mm.h>
-#include <linux/mmzone.h>
-#include <linux/time.h>
#include <linux/sched/signal.h>
#include <linux/slab.h>
-#include <linux/vmalloc.h>
#include <linux/file.h>
#include <linux/fdtable.h>
#include <linux/bitops.h>
-#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/rcupdate.h>
-#include <linux/workqueue.h>
unsigned int sysctl_nr_open __read_mostly = 1024*1024;
unsigned int sysctl_nr_open_min = BITS_PER_LONG;
diff --git a/fs/file_table.c b/fs/file_table.c
index 2dc9f38bd195..7ec0b3e5f05d 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -23,7 +23,6 @@
#include <linux/sysctl.h>
#include <linux/percpu_counter.h>
#include <linux/percpu.h>
-#include <linux/hardirq.h>
#include <linux/task_work.h>
#include <linux/ima.h>
#include <linux/swap.h>
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index d8c274d39ddb..eab04eca95a3 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -362,7 +362,6 @@ error_io:
ret = -EIO;
error:
mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
iget_failed(inode);
return ERR_PTR(ret);
}
diff --git a/fs/namei.c b/fs/namei.c
index 7c221fb0836b..921ae32dbc80 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -391,50 +391,6 @@ static inline int do_inode_permission(struct inode *inode, int mask)
}
/**
- * __inode_permission - Check for access rights to a given inode
- * @inode: Inode to check permission on
- * @mask: Right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC)
- *
- * Check for read/write/execute permissions on an inode.
- *
- * When checking for MAY_APPEND, MAY_WRITE must also be set in @mask.
- *
- * This does not check for a read-only file system. You probably want
- * inode_permission().
- */
-int __inode_permission(struct inode *inode, int mask)
-{
- int retval;
-
- if (unlikely(mask & MAY_WRITE)) {
- /*
- * Nobody gets write access to an immutable file.
- */
- if (IS_IMMUTABLE(inode))
- return -EPERM;
-
- /*
- * Updating mtime will likely cause i_uid and i_gid to be
- * written back improperly if their true value is unknown
- * to the vfs.
- */
- if (HAS_UNMAPPED_ID(inode))
- return -EACCES;
- }
-
- retval = do_inode_permission(inode, mask);
- if (retval)
- return retval;
-
- retval = devcgroup_inode_permission(inode, mask);
- if (retval)
- return retval;
-
- return security_inode_permission(inode, mask);
-}
-EXPORT_SYMBOL(__inode_permission);
-
-/**
* sb_permission - Check superblock-level permissions
* @sb: Superblock of inode to check permission on
* @inode: Inode to check permission on
@@ -472,7 +428,32 @@ int inode_permission(struct inode *inode, int mask)
retval = sb_permission(inode->i_sb, inode, mask);
if (retval)
return retval;
- return __inode_permission(inode, mask);
+
+ if (unlikely(mask & MAY_WRITE)) {
+ /*
+ * Nobody gets write access to an immutable file.
+ */
+ if (IS_IMMUTABLE(inode))
+ return -EPERM;
+
+ /*
+ * Updating mtime will likely cause i_uid and i_gid to be
+ * written back improperly if their true value is unknown
+ * to the vfs.
+ */
+ if (HAS_UNMAPPED_ID(inode))
+ return -EACCES;
+ }
+
+ retval = do_inode_permission(inode, mask);
+ if (retval)
+ return retval;
+
+ retval = devcgroup_inode_permission(inode, mask);
+ if (retval)
+ return retval;
+
+ return security_inode_permission(inode, mask);
}
EXPORT_SYMBOL(inode_permission);
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 626d1382002e..6b3b372b59b9 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -8,7 +8,6 @@
#include <linux/file.h>
#include <linux/falloc.h>
#include <linux/nfs_fs.h>
-#include <uapi/linux/btrfs.h> /* BTRFS_IOC_CLONE/BTRFS_IOC_CLONE_RANGE */
#include "delegation.h"
#include "internal.h"
#include "iostat.h"
diff --git a/fs/super.c b/fs/super.c
index 06bd25d90ba5..672538ca9831 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -225,7 +225,7 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags,
if (s->s_user_ns != &init_user_ns)
s->s_iflags |= SB_I_NODEV;
INIT_HLIST_NODE(&s->s_instances);
- INIT_HLIST_BL_HEAD(&s->s_anon);
+ INIT_HLIST_BL_HEAD(&s->s_roots);
mutex_init(&s->s_sync_lock);
INIT_LIST_HEAD(&s->s_inodes);
spin_lock_init(&s->s_inode_list_lock);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 10:36:18 +0000