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Diffstat (limited to 'fs/ubifs/file.c')
-rw-r--r--fs/ubifs/file.c64
1 files changed, 31 insertions, 33 deletions
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index f9c234bf33d..b5b593c4527 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -37,11 +37,11 @@
*
* A thing to keep in mind: inode @i_mutex is locked in most VFS operations we
* implement. However, this is not true for 'ubifs_writepage()', which may be
- * called with @i_mutex unlocked. For example, when pdflush is doing background
- * write-back, it calls 'ubifs_writepage()' with unlocked @i_mutex. At "normal"
- * work-paths the @i_mutex is locked in 'ubifs_writepage()', e.g. in the
- * "sys_write -> alloc_pages -> direct reclaim path". So, in 'ubifs_writepage()'
- * we are only guaranteed that the page is locked.
+ * called with @i_mutex unlocked. For example, when flusher thread is doing
+ * background write-back, it calls 'ubifs_writepage()' with unlocked @i_mutex.
+ * At "normal" work-paths the @i_mutex is locked in 'ubifs_writepage()', e.g.
+ * in the "sys_write -> alloc_pages -> direct reclaim path". So, in
+ * 'ubifs_writepage()' we are only guaranteed that the page is locked.
*
* Similarly, @i_mutex is not always locked in 'ubifs_readpage()', e.g., the
* read-ahead path does not lock it ("sys_read -> generic_file_aio_read ->
@@ -50,6 +50,7 @@
*/
#include "ubifs.h"
+#include <linux/aio.h>
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/slab.h>
@@ -97,7 +98,7 @@ static int read_block(struct inode *inode, void *addr, unsigned int block,
dump:
ubifs_err("bad data node (block %u, inode %lu)",
block, inode->i_ino);
- dbg_dump_node(c, dn);
+ ubifs_dump_node(c, dn);
return -EINVAL;
}
@@ -902,8 +903,9 @@ static int do_writepage(struct page *page, int len)
struct ubifs_info *c = inode->i_sb->s_fs_info;
#ifdef UBIFS_DEBUG
+ struct ubifs_inode *ui = ubifs_inode(inode);
spin_lock(&ui->ui_lock);
- ubifs_assert(page->index <= ui->synced_i_size << PAGE_CACHE_SIZE);
+ ubifs_assert(page->index <= ui->synced_i_size >> PAGE_CACHE_SHIFT);
spin_unlock(&ui->ui_lock);
#endif
@@ -1042,10 +1044,10 @@ static int ubifs_writepage(struct page *page, struct writeback_control *wbc)
* the page size, the remaining memory is zeroed when mapped, and
* writes to that region are not written out to the file."
*/
- kaddr = kmap_atomic(page, KM_USER0);
+ kaddr = kmap_atomic(page);
memset(kaddr + len, 0, PAGE_CACHE_SIZE - len);
flush_dcache_page(page);
- kunmap_atomic(kaddr, KM_USER0);
+ kunmap_atomic(kaddr);
if (i_size > synced_i_size) {
err = inode->i_sb->s_op->write_inode(inode, NULL);
@@ -1276,13 +1278,14 @@ int ubifs_setattr(struct dentry *dentry, struct iattr *attr)
return err;
}
-static void ubifs_invalidatepage(struct page *page, unsigned long offset)
+static void ubifs_invalidatepage(struct page *page, unsigned int offset,
+ unsigned int length)
{
struct inode *inode = page->mapping->host;
struct ubifs_info *c = inode->i_sb->s_fs_info;
ubifs_assert(PagePrivate(page));
- if (offset)
+ if (offset || length < PAGE_CACHE_SIZE)
/* Partial page remains dirty */
return;
@@ -1361,17 +1364,17 @@ static inline int mctime_update_needed(const struct inode *inode,
/**
* update_ctime - update mtime and ctime of an inode.
- * @c: UBIFS file-system description object
* @inode: inode to update
*
* This function updates mtime and ctime of the inode if it is not equivalent to
* current time. Returns zero in case of success and a negative error code in
* case of failure.
*/
-static int update_mctime(struct ubifs_info *c, struct inode *inode)
+static int update_mctime(struct inode *inode)
{
struct timespec now = ubifs_current_time(inode);
struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
if (mctime_update_needed(inode, &now)) {
int err, release;
@@ -1394,18 +1397,13 @@ static int update_mctime(struct ubifs_info *c, struct inode *inode)
return 0;
}
-static ssize_t ubifs_aio_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
+static ssize_t ubifs_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
- int err;
- struct inode *inode = iocb->ki_filp->f_mapping->host;
- struct ubifs_info *c = inode->i_sb->s_fs_info;
-
- err = update_mctime(c, inode);
+ int err = update_mctime(file_inode(iocb->ki_filp));
if (err)
return err;
- return generic_file_aio_write(iocb, iov, nr_segs, pos);
+ return generic_file_write_iter(iocb, from);
}
static int ubifs_set_page_dirty(struct page *page)
@@ -1444,7 +1442,7 @@ static int ubifs_vm_page_mkwrite(struct vm_area_struct *vma,
struct vm_fault *vmf)
{
struct page *page = vmf->page;
- struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(vma->vm_file);
struct ubifs_info *c = inode->i_sb->s_fs_info;
struct timespec now = ubifs_current_time(inode);
struct ubifs_budget_req req = { .new_page = 1 };
@@ -1486,8 +1484,8 @@ static int ubifs_vm_page_mkwrite(struct vm_area_struct *vma,
err = ubifs_budget_space(c, &req);
if (unlikely(err)) {
if (err == -ENOSPC)
- ubifs_warn("out of space for mmapped file "
- "(inode number %lu)", inode->i_ino);
+ ubifs_warn("out of space for mmapped file (inode number %lu)",
+ inode->i_ino);
return VM_FAULT_SIGBUS;
}
@@ -1522,8 +1520,8 @@ static int ubifs_vm_page_mkwrite(struct vm_area_struct *vma,
ubifs_release_dirty_inode_budget(c, ui);
}
- unlock_page(page);
- return 0;
+ wait_for_stable_page(page);
+ return VM_FAULT_LOCKED;
out_unlock:
unlock_page(page);
@@ -1535,7 +1533,9 @@ out_unlock:
static const struct vm_operations_struct ubifs_file_vm_ops = {
.fault = filemap_fault,
+ .map_pages = filemap_map_pages,
.page_mkwrite = ubifs_vm_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma)
@@ -1562,12 +1562,10 @@ const struct address_space_operations ubifs_file_address_operations = {
const struct inode_operations ubifs_file_inode_operations = {
.setattr = ubifs_setattr,
.getattr = ubifs_getattr,
-#ifdef CONFIG_UBIFS_FS_XATTR
.setxattr = ubifs_setxattr,
.getxattr = ubifs_getxattr,
.listxattr = ubifs_listxattr,
.removexattr = ubifs_removexattr,
-#endif
};
const struct inode_operations ubifs_symlink_inode_operations = {
@@ -1579,15 +1577,15 @@ const struct inode_operations ubifs_symlink_inode_operations = {
const struct file_operations ubifs_file_operations = {
.llseek = generic_file_llseek,
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = generic_file_aio_read,
- .aio_write = ubifs_aio_write,
+ .read = new_sync_read,
+ .write = new_sync_write,
+ .read_iter = generic_file_read_iter,
+ .write_iter = ubifs_write_iter,
.mmap = ubifs_file_mmap,
.fsync = ubifs_fsync,
.unlocked_ioctl = ubifs_ioctl,
.splice_read = generic_file_splice_read,
- .splice_write = generic_file_splice_write,
+ .splice_write = iter_file_splice_write,
#ifdef CONFIG_COMPAT
.compat_ioctl = ubifs_compat_ioctl,
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 12:05:28 +0000