xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
派生 0
代码 工单 合并请求 工作流 软件包 项目 发布 百科 活动

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

浏览代码 
Pull vfs updates from Al Viro:
 "This the bunch that sat in -next + lock_parent() fix.  This is the
  minimal set; there's more pending stuff.

  In particular, I really hope to get acct.c fixes merged this cycle -
  we need that to deal sanely with delayed-mntput stuff.  In the next
  pile, hopefully - that series is fairly short and localized
  (kernel/acct.c, fs/super.c and fs/namespace.c).  In this pile: more
  iov_iter work.  Most of prereqs for ->splice_write with sane locking
  order are there and Kent's dio rewrite would also fit nicely on top of
  this pile"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (70 commits)
  lock_parent: don't step on stale ->d_parent of all-but-freed one
  kill generic_file_splice_write()
  ceph: switch to iter_file_splice_write()
  shmem: switch to iter_file_splice_write()
  nfs: switch to iter_splice_write_file()
  fs/splice.c: remove unneeded exports
  ocfs2: switch to iter_file_splice_write()
  ->splice_write() via ->write_iter()
  bio_vec-backed iov_iter
  optimize copy_page_{to,from}_iter()
  bury generic_file_aio_{read,write}
  lustre: get rid of messing with iovecs
  ceph: switch to ->write_iter()
  ceph_sync_direct_write: stop poking into iov_iter guts
  ceph_sync_read: stop poking into iov_iter guts
  new helper: copy_page_from_iter()
  fuse: switch to ->write_iter()
  btrfs: switch to ->write_iter()
  ocfs2: switch to ->write_iter()
  xfs: switch to ->write_iter()
  ...
这个提交包含在：
Linus Torvalds
2014-06-12 10:30:18 -07:00
父节点 5c02c392cd c2338f2dc7
当前提交 16b9057804
共修改 102 个文件，包含 1799 行新增和 2031 行删除
下载 Patch 文件 下载 Diff 文件 展开所有文件 折叠所有文件

4
fs/ceph/addr.c
查看文件

@@ -1187,8 +1187,8 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
* never get called.
*/
static ssize_t ceph_direct_io(int rw, struct kiocb *iocb,
const struct iovec *iov,
loff_t pos, unsigned long nr_segs)
struct iov_iter *iter,
loff_t pos)
{
WARN_ON(1);
return -EINVAL;

185
fs/ceph/file.c
查看文件

@@ -418,7 +418,7 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *i,
struct page **pages;
u64 off = iocb->ki_pos;
int num_pages, ret;
size_t len = i->count;
size_t len = iov_iter_count(i);
dout("sync_read on file %p %llu~%u %s\n", file, off,
(unsigned)len,
@@ -436,25 +436,26 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *i,
if (file->f_flags & O_DIRECT) {
while (iov_iter_count(i)) {
void __user *data = i->iov[0].iov_base + i->iov_offset;
size_t len = i->iov[0].iov_len - i->iov_offset;
size_t start;
ssize_t n;
num_pages = calc_pages_for((unsigned long)data, len);
pages = ceph_get_direct_page_vector(data,
num_pages, true);
if (IS_ERR(pages))
return PTR_ERR(pages);
n = iov_iter_get_pages_alloc(i, &pages, INT_MAX, &start);
if (n < 0)
return n;
ret = striped_read(inode, off, len,
num_pages = (n + start + PAGE_SIZE - 1) / PAGE_SIZE;
ret = striped_read(inode, off, n,
pages, num_pages, checkeof,
1, (unsigned long)data & ~PAGE_MASK);
1, start);
ceph_put_page_vector(pages, num_pages, true);
if (ret <= 0)
break;
off += ret;
iov_iter_advance(i, ret);
if (ret < len)
if (ret < n)
break;
}
} else {
@@ -466,25 +467,14 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *i,
num_pages, checkeof, 0, 0);
if (ret > 0) {
int l, k = 0;
size_t left = len = ret;
size_t left = ret;
while (left) {
void __user *data = i->iov[0].iov_base
+ i->iov_offset;
l = min(i->iov[0].iov_len - i->iov_offset,
left);
ret = ceph_copy_page_vector_to_user(&pages[k],
data, off,
l);
if (ret > 0) {
iov_iter_advance(i, ret);
left -= ret;
off += ret;
k = calc_pages_for(iocb->ki_pos,
len - left + 1) - 1;
BUG_ON(k >= num_pages && left);
} else
int copy = min_t(size_t, PAGE_SIZE, left);
l = copy_page_to_iter(pages[k++], 0, copy, i);
off += l;
left -= l;
if (l < copy)
break;
}
}
@@ -541,8 +531,7 @@ static void ceph_sync_write_unsafe(struct ceph_osd_request *req, bool unsafe)
* objects, rollback on failure, etc.)
*/
static ssize_t
ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, size_t count)
ceph_sync_direct_write(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
@@ -556,11 +545,10 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
int written = 0;
int flags;
int check_caps = 0;
int page_align;
int ret;
struct timespec mtime = CURRENT_TIME;
loff_t pos = iocb->ki_pos;
struct iov_iter i;
size_t count = iov_iter_count(from);
if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
return -EROFS;
@@ -582,13 +570,10 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
CEPH_OSD_FLAG_ONDISK |
CEPH_OSD_FLAG_WRITE;
iov_iter_init(&i, iov, nr_segs, count, 0);
while (iov_iter_count(&i) > 0) {
void __user *data = i.iov->iov_base + i.iov_offset;
u64 len = i.iov->iov_len - i.iov_offset;
page_align = (unsigned long)data & ~PAGE_MASK;
while (iov_iter_count(from) > 0) {
u64 len = iov_iter_single_seg_count(from);
size_t start;
ssize_t n;
snapc = ci->i_snap_realm->cached_context;
vino = ceph_vino(inode);
@@ -604,20 +589,21 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
break;
}
num_pages = calc_pages_for(page_align, len);
pages = ceph_get_direct_page_vector(data, num_pages, false);
if (IS_ERR(pages)) {
ret = PTR_ERR(pages);
goto out;
n = iov_iter_get_pages_alloc(from, &pages, len, &start);
if (unlikely(n < 0)) {
ret = n;
ceph_osdc_put_request(req);
break;
}
num_pages = (n + start + PAGE_SIZE - 1) / PAGE_SIZE;
/*
* throw out any page cache pages in this range. this
* may block.
*/
truncate_inode_pages_range(inode->i_mapping, pos,
(pos+len) | (PAGE_CACHE_SIZE-1));
osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
(pos+n) | (PAGE_CACHE_SIZE-1));
osd_req_op_extent_osd_data_pages(req, 0, pages, n, start,
false, false);
/* BUG_ON(vino.snap != CEPH_NOSNAP); */
@@ -629,22 +615,20 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
ceph_put_page_vector(pages, num_pages, false);
out:
ceph_osdc_put_request(req);
if (ret == 0) {
pos += len;
written += len;
iov_iter_advance(&i, (size_t)len);
if (pos > i_size_read(inode)) {
check_caps = ceph_inode_set_size(inode, pos);
if (check_caps)
ceph_check_caps(ceph_inode(inode),
CHECK_CAPS_AUTHONLY,
NULL);
}
} else
if (ret)
break;
pos += n;
written += n;
iov_iter_advance(from, n);
if (pos > i_size_read(inode)) {
check_caps = ceph_inode_set_size(inode, pos);
if (check_caps)
ceph_check_caps(ceph_inode(inode),
CHECK_CAPS_AUTHONLY,
NULL);
}
}
if (ret != -EOLDSNAPC && written > 0) {
@@ -662,8 +646,7 @@ out:
* correct atomic write, we should e.g. take write locks on all
* objects, rollback on failure, etc.)
*/
static ssize_t ceph_sync_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, size_t count)
static ssize_t ceph_sync_write(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
@@ -681,7 +664,7 @@ static ssize_t ceph_sync_write(struct kiocb *iocb, const struct iovec *iov,
int ret;
struct timespec mtime = CURRENT_TIME;
loff_t pos = iocb->ki_pos;
struct iov_iter i;
size_t count = iov_iter_count(from);
if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
return -EROFS;
@@ -703,9 +686,7 @@ static ssize_t ceph_sync_write(struct kiocb *iocb, const struct iovec *iov,
CEPH_OSD_FLAG_WRITE |
CEPH_OSD_FLAG_ACK;
iov_iter_init(&i, iov, nr_segs, count, 0);
while ((len = iov_iter_count(&i)) > 0) {
while ((len = iov_iter_count(from)) > 0) {
size_t left;
int n;
@@ -737,13 +718,12 @@ static ssize_t ceph_sync_write(struct kiocb *iocb, const struct iovec *iov,
left = len;
for (n = 0; n < num_pages; n++) {
size_t plen = min_t(size_t, left, PAGE_SIZE);
ret = iov_iter_copy_from_user(pages[n], &i, 0, plen);
ret = copy_page_from_iter(pages[n], 0, plen, from);
if (ret != plen) {
ret = -EFAULT;
break;
}
left -= ret;
iov_iter_advance(&i, ret);
}
if (ret < 0) {
@@ -796,8 +776,7 @@ out:
*
* Hmm, the sync read case isn't actually async... should it be?
*/
static ssize_t ceph_aio_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
struct file *filp = iocb->ki_filp;
struct ceph_file_info *fi = filp->private_data;
@@ -823,40 +802,20 @@ again:
if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
(iocb->ki_filp->f_flags & O_DIRECT) ||
(fi->flags & CEPH_F_SYNC)) {
struct iov_iter i;
dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n",
inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
ceph_cap_string(got));
if (!read) {
ret = generic_segment_checks(iov, &nr_segs,
&len, VERIFY_WRITE);
if (ret)
goto out;
}
iov_iter_init(&i, iov, nr_segs, len, read);
/* hmm, this isn't really async... */
ret = ceph_sync_read(iocb, &i, &checkeof);
ret = ceph_sync_read(iocb, to, &checkeof);
} else {
/*
* We can't modify the content of iov,
* so we only read from beginning.
*/
if (read) {
iocb->ki_pos = pos;
len = iocb->ki_nbytes;
read = 0;
}
dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n",
inode, ceph_vinop(inode), pos, (unsigned)len,
inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
ceph_cap_string(got));
ret = generic_file_aio_read(iocb, iov, nr_segs, pos);
ret = generic_file_read_iter(iocb, to);
}
out:
dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n",
inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret);
ceph_put_cap_refs(ci, got);
@@ -872,6 +831,7 @@ out:
", reading more\n", iocb->ki_pos,
inode->i_size);
iov_iter_advance(to, ret);
read += ret;
len -= ret;
checkeof = 0;
@@ -895,8 +855,7 @@ out:
*
* If we are near ENOSPC, write synchronously.
*/
static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct ceph_file_info *fi = file->private_data;
@@ -904,18 +863,15 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_osd_client *osdc =
&ceph_sb_to_client(inode->i_sb)->client->osdc;
ssize_t count, written = 0;
ssize_t count = iov_iter_count(from), written = 0;
int err, want, got;
loff_t pos = iocb->ki_pos;
if (ceph_snap(inode) != CEPH_NOSNAP)
return -EROFS;
mutex_lock(&inode->i_mutex);
err = generic_segment_checks(iov, &nr_segs, &count, VERIFY_READ);
if (err)
goto out;
/* We can write back this queue in page reclaim */
current->backing_dev_info = file->f_mapping->backing_dev_info;
@@ -925,6 +881,7 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (count == 0)
goto out;
iov_iter_truncate(from, count);
err = file_remove_suid(file);
if (err)
@@ -956,23 +913,26 @@ retry_snap:
if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
(file->f_flags & O_DIRECT) || (fi->flags & CEPH_F_SYNC)) {
struct iov_iter data;
mutex_unlock(&inode->i_mutex);
/* we might need to revert back to that point */
data = *from;
if (file->f_flags & O_DIRECT)
written = ceph_sync_direct_write(iocb, iov,
nr_segs, count);
written = ceph_sync_direct_write(iocb, &data);
else
written = ceph_sync_write(iocb, iov, nr_segs, count);
written = ceph_sync_write(iocb, &data);
if (written == -EOLDSNAPC) {
dout("aio_write %p %llx.%llx %llu~%u"
"got EOLDSNAPC, retrying\n",
inode, ceph_vinop(inode),
pos, (unsigned)iov->iov_len);
pos, (unsigned)count);
mutex_lock(&inode->i_mutex);
goto retry_snap;
}
if (written > 0)
iov_iter_advance(from, written);
} else {
loff_t old_size = inode->i_size;
struct iov_iter from;
/*
* No need to acquire the i_truncate_mutex. Because
* the MDS revokes Fwb caps before sending truncate
@@ -980,8 +940,7 @@ retry_snap:
* are pending vmtruncate. So write and vmtruncate
* can not run at the same time
*/
iov_iter_init(&from, iov, nr_segs, count, 0);
written = generic_perform_write(file, &from, pos);
written = generic_perform_write(file, from, pos);
if (likely(written >= 0))
iocb->ki_pos = pos + written;
if (inode->i_size > old_size)
@@ -999,7 +958,7 @@ retry_snap:
}
dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
inode, ceph_vinop(inode), pos, (unsigned)count,
ceph_cap_string(got));
ceph_put_cap_refs(ci, got);
@@ -1276,16 +1235,16 @@ const struct file_operations ceph_file_fops = {
.open = ceph_open,
.release = ceph_release,
.llseek = ceph_llseek,
.read = do_sync_read,
.write = do_sync_write,
.aio_read = ceph_aio_read,
.aio_write = ceph_aio_write,
.read = new_sync_read,
.write = new_sync_write,
.read_iter = ceph_read_iter,
.write_iter = ceph_write_iter,
.mmap = ceph_mmap,
.fsync = ceph_fsync,
.lock = ceph_lock,
.flock = ceph_flock,
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
.splice_write = iter_file_splice_write,
.unlocked_ioctl = ceph_ioctl,
.compat_ioctl = ceph_ioctl,
.fallocate = ceph_fallocate,