f2fs: Update to proper 3.4 support
http://git.kernel.org/cgit/linux/kernel/git/jaegeuk/f2fs.git/log/?h=linux-3.4
Change-Id: Ica17871e847d4807c7ef24ea77dd4bff5451f5c7
Conflicts:
fs/f2fs/f2fs.h
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0e147b6c..0e88a75 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -19,6 +19,7 @@
#include <linux/compat.h>
#include <linux/uaccess.h>
#include <linux/mount.h>
+#include <linux/pagevec.h>
#include "f2fs.h"
#include "node.h"
@@ -31,22 +32,13 @@
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 f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
struct dnode_of_data dn;
int err;
f2fs_balance_fs(sbi);
- /* F2FS backport: We replace in old kernels sb_start_pagefault(inode->i_sb) with vfs_check_frozen()
- * and remove the original sb_end_pagefault(inode->i_sb) after the out label
- *
- * The introduction of sb_{start,end}_pagefault() was made post-3.2 kernels by Jan Kara
- * and merged in commit a0e881b7c189fa2bd76c024dbff91e79511c971d.
- * Discussed at https://lkml.org/lkml/2012/3/5/278
- *
- * - Alex
- */
vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
/* block allocation */
@@ -91,8 +83,8 @@
}
static const struct vm_operations_struct f2fs_file_vm_ops = {
- .fault = filemap_fault,
- .page_mkwrite = f2fs_vm_page_mkwrite,
+ .fault = filemap_fault,
+ .page_mkwrite = f2fs_vm_page_mkwrite,
};
static int get_parent_ino(struct inode *inode, nid_t *pino)
@@ -193,18 +185,161 @@
ret = wait_on_node_pages_writeback(sbi, inode->i_ino);
if (ret)
goto out;
- ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
+ ret = f2fs_issue_flush(F2FS_SB(inode->i_sb));
}
out:
trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
return ret;
}
+static pgoff_t __get_first_dirty_index(struct address_space *mapping,
+ pgoff_t pgofs, int whence)
+{
+ struct pagevec pvec;
+ int nr_pages;
+
+ if (whence != SEEK_DATA)
+ return 0;
+
+ /* find first dirty page index */
+ pagevec_init(&pvec, 0);
+ nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, PAGECACHE_TAG_DIRTY, 1);
+ pgofs = nr_pages ? pvec.pages[0]->index: LONG_MAX;
+ pagevec_release(&pvec);
+ return pgofs;
+}
+
+static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
+ int whence)
+{
+ switch (whence) {
+ case SEEK_DATA:
+ if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
+ (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
+ return true;
+ break;
+ case SEEK_HOLE:
+ if (blkaddr == NULL_ADDR)
+ return true;
+ break;
+ }
+ return false;
+}
+
+static inline int unsigned_offsets(struct file *file)
+{
+ return file->f_mode & FMODE_UNSIGNED_OFFSET;
+}
+
+static loff_t vfs_setpos(struct file *file, loff_t offset, loff_t maxsize)
+{
+ if (offset < 0 && !unsigned_offsets(file))
+ return -EINVAL;
+ if (offset > maxsize)
+ return -EINVAL;
+
+ if (offset != file->f_pos) {
+ file->f_pos = offset;
+ file->f_version = 0;
+ }
+ return offset;
+}
+
+static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
+{
+ struct inode *inode = file->f_mapping->host;
+ loff_t maxbytes = inode->i_sb->s_maxbytes;
+ struct dnode_of_data dn;
+ pgoff_t pgofs, end_offset, dirty;
+ loff_t data_ofs = offset;
+ loff_t isize;
+ int err = 0;
+
+ mutex_lock(&inode->i_mutex);
+
+ isize = i_size_read(inode);
+ if (offset >= isize)
+ goto fail;
+
+ /* handle inline data case */
+ if (f2fs_has_inline_data(inode)) {
+ if (whence == SEEK_HOLE)
+ data_ofs = isize;
+ goto found;
+ }
+
+ pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT);
+
+ dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
+
+ for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) {
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA);
+ if (err && err != -ENOENT) {
+ goto fail;
+ } else if (err == -ENOENT) {
+ /* direct node is not exist */
+ if (whence == SEEK_DATA) {
+ pgofs = PGOFS_OF_NEXT_DNODE(pgofs,
+ F2FS_I(inode));
+ continue;
+ } else {
+ goto found;
+ }
+ }
+
+ end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
+
+ /* find data/hole in dnode block */
+ for (; dn.ofs_in_node < end_offset;
+ dn.ofs_in_node++, pgofs++,
+ data_ofs = pgofs << PAGE_CACHE_SHIFT) {
+ block_t blkaddr;
+ blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
+
+ if (__found_offset(blkaddr, dirty, pgofs, whence)) {
+ f2fs_put_dnode(&dn);
+ goto found;
+ }
+ }
+ f2fs_put_dnode(&dn);
+ }
+
+ if (whence == SEEK_DATA)
+ goto fail;
+found:
+ if (whence == SEEK_HOLE && data_ofs > isize)
+ data_ofs = isize;
+ mutex_unlock(&inode->i_mutex);
+ return vfs_setpos(file, data_ofs, maxbytes);
+fail:
+ mutex_unlock(&inode->i_mutex);
+ return -ENXIO;
+}
+
+static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
+{
+ struct inode *inode = file->f_mapping->host;
+ loff_t maxbytes = inode->i_sb->s_maxbytes;
+
+ switch (whence) {
+ case SEEK_SET:
+ case SEEK_CUR:
+ case SEEK_END:
+ return generic_file_llseek_size(file, offset, whence,
+ maxbytes);
+ case SEEK_DATA:
+ case SEEK_HOLE:
+ return f2fs_seek_block(file, offset, whence);
+ }
+
+ return -EINVAL;
+}
+
static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
file_accessed(file);
vma->vm_ops = &f2fs_file_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
@@ -260,13 +395,15 @@
return;
lock_page(page);
- if (unlikely(page->mapping != inode->i_mapping)) {
- f2fs_put_page(page, 1);
- return;
- }
+ if (unlikely(!PageUptodate(page) ||
+ page->mapping != inode->i_mapping))
+ goto out;
+
f2fs_wait_on_page_writeback(page, DATA);
zero_user(page, offset, PAGE_CACHE_SIZE - offset);
set_page_dirty(page);
+
+out:
f2fs_put_page(page, 1);
}
@@ -575,7 +712,7 @@
static long f2fs_fallocate(struct file *file, int mode,
loff_t offset, loff_t len)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
long ret;
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
@@ -614,7 +751,7 @@
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
- struct inode *inode = filp->f_dentry->d_inode;
+ struct inode *inode = file_inode(filp);
struct f2fs_inode_info *fi = F2FS_I(inode);
unsigned int flags;
int ret;
@@ -627,7 +764,7 @@
{
unsigned int oldflags;
- ret = mnt_want_write(filp->f_path.mnt);
+ ret = mnt_want_write_file(filp);
if (ret)
return ret;
@@ -664,7 +801,7 @@
inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(inode);
out:
- mnt_drop_write(filp->f_path.mnt);
+ mnt_drop_write_file(filp);
return ret;
}
default:
@@ -690,7 +827,7 @@
#endif
const struct file_operations f2fs_file_operations = {
- .llseek = generic_file_llseek,
+ .llseek = f2fs_llseek,
.read = do_sync_read,
.write = do_sync_write,
.aio_read = generic_file_aio_read,