#include <linux/poll.h>
struct serial2002_range_table_t {
-
/* HACK... */
int length;
struct comedi_krange range;
};
struct serial2002_private {
-
int port; /* /dev/ttyS<port> */
int speed; /* baudrate */
struct file *tty;
{
const char __user *p = (__force const char __user *)buf;
int result;
+ loff_t offset = 0;
mm_segment_t oldfs;
oldfs = get_fs();
set_fs(KERNEL_DS);
- f->f_pos = 0;
- result = f->f_op->write(f, p, count, &f->f_pos);
+ result = __vfs_write(f, p, count, &offset);
set_fs(oldfs);
return result;
}
- static int serial2002_tty_readb(struct file *f, unsigned char *buf)
- {
- char __user *p = (__force char __user *)buf;
-
- f->f_pos = 0;
- return f->f_op->read(f, p, 1, &f->f_pos);
- }
-
static void serial2002_tty_read_poll_wait(struct file *f, int timeout)
{
struct poll_wqueues table;
break;
}
do_gettimeofday(&now);
- elapsed = (1000000 * (now.tv_sec - start.tv_sec) +
- now.tv_usec - start.tv_usec);
+ elapsed = 1000000 * (now.tv_sec - start.tv_sec) +
+ now.tv_usec - start.tv_usec;
if (elapsed > timeout)
break;
set_current_state(TASK_INTERRUPTIBLE);
result = -1;
if (!IS_ERR(f)) {
mm_segment_t oldfs;
+ char __user *p = (__force char __user *)&ch;
+ loff_t offset = 0;
oldfs = get_fs();
set_fs(KERNEL_DS);
if (f->f_op->poll) {
serial2002_tty_read_poll_wait(f, timeout);
- if (serial2002_tty_readb(f, &ch) == 1)
+ if (__vfs_read(f, p, 1, &offset) == 1)
result = ch;
} else {
/* Device does not support poll, busy wait */
if (retries >= timeout)
break;
- if (serial2002_tty_readb(f, &ch) == 1) {
+ if (__vfs_read(f, p, 1, &offset) == 1) {
result = ch;
break;
}
}
}
return result;
-
}
static void serial2002_write(struct file *f, struct serial_data data)
op_data->op_lease_handle = och->och_lease_handle;
op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
}
- epoch_close = (op_data->op_flags & MF_EPOCH_CLOSE);
+ epoch_close = op_data->op_flags & MF_EPOCH_CLOSE;
rc = md_close(md_exp, op_data, och->och_mod, &req);
if (rc == -EAGAIN) {
/* This close must have the epoch closed. */
}
if (rc == 0 && op_data->op_bias & MDS_HSM_RELEASE) {
struct mdt_body *body;
+
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
if (!(body->valid & OBD_MD_FLRELEASED))
rc = -EBUSY;
int lockmode;
__u64 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
struct lustre_handle lockh;
- ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_OPEN}};
+ ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_OPEN}};
int rc = 0;
/* clear group lock, if present */
out_och_free:
if (rc) {
if (och_p && *och_p) {
- OBD_FREE(*och_p, sizeof (struct obd_client_handle));
+ OBD_FREE(*och_p, sizeof(struct obd_client_handle));
*och_p = NULL; /* OBD_FREE writes some magic there */
(*och_usecount)--;
}
fm_key.oa.o_oi = lsm->lsm_oi;
fm_key.oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
+ if (i_size_read(inode) == 0) {
+ rc = ll_glimpse_size(inode);
+ if (rc)
+ goto out;
+ }
+
obdo_from_inode(&fm_key.oa, inode, OBD_MD_FLSIZE);
obdo_set_parent_fid(&fm_key.oa, &ll_i2info(inode)->lli_fid);
/* If filesize is 0, then there would be no objects for mapping */
int i;
if (!inode)
- return 0;
+ return 0;
fid = &ll_i2info(inode)->lli_fid;
CDEBUG(D_INFO, "trying to match res "DFID" mode %s\n", PFID(fid),
/* -o localflock - only provides locally consistent flock locks */
struct file_operations ll_file_operations = {
- .read = new_sync_read,
.read_iter = ll_file_read_iter,
- .write = new_sync_write,
.write_iter = ll_file_write_iter,
.unlocked_ioctl = ll_file_ioctl,
.open = ll_file_open,
};
struct file_operations ll_file_operations_flock = {
- .read = new_sync_read,
.read_iter = ll_file_read_iter,
- .write = new_sync_write,
.write_iter = ll_file_write_iter,
.unlocked_ioctl = ll_file_ioctl,
.open = ll_file_open,
/* These are for -o noflock - to return ENOSYS on flock calls */
struct file_operations ll_file_operations_noflock = {
- .read = new_sync_read,
.read_iter = ll_file_read_iter,
- .write = new_sync_write,
.write_iter = ll_file_write_iter,
.unlocked_ioctl = ll_file_ioctl,
.open = ll_file_open,
return in_data;
}
+EXPORT_SYMBOL(ll_iocontrol_register);
void ll_iocontrol_unregister(void *magic)
{
CWARN("didn't find iocontrol register block with magic: %p\n", magic);
}
-
-EXPORT_SYMBOL(ll_iocontrol_register);
EXPORT_SYMBOL(ll_iocontrol_unregister);
static enum llioc_iter
return 0;
}
-static void aio_ring_remap(struct file *file, struct vm_area_struct *vma)
+static int aio_ring_remap(struct file *file, struct vm_area_struct *vma)
{
struct mm_struct *mm = vma->vm_mm;
struct kioctx_table *table;
- int i;
+ int i, res = -EINVAL;
spin_lock(&mm->ioctx_lock);
rcu_read_lock();
ctx = table->table[i];
if (ctx && ctx->aio_ring_file == file) {
- ctx->user_id = ctx->mmap_base = vma->vm_start;
+ if (!atomic_read(&ctx->dead)) {
+ ctx->user_id = ctx->mmap_base = vma->vm_start;
+ res = 0;
+ }
break;
}
}
rcu_read_unlock();
spin_unlock(&mm->ioctx_lock);
+ return res;
}
static const struct file_operations aio_ring_fops = {
nr_events *= 2;
/* Prevent overflows */
- if ((nr_events > (0x10000000U / sizeof(struct io_event))) ||
- (nr_events > (0x10000000U / sizeof(struct kiocb)))) {
+ if (nr_events > (0x10000000U / sizeof(struct io_event))) {
pr_debug("ENOMEM: nr_events too high\n");
return ERR_PTR(-EINVAL);
}
err_cleanup:
aio_nr_sub(ctx->max_reqs);
err_ctx:
+ atomic_set(&ctx->dead, 1);
+ if (ctx->mmap_size)
+ vm_munmap(ctx->mmap_base, ctx->mmap_size);
aio_free_ring(ctx);
err:
mutex_unlock(&ctx->ring_lock);
{
struct kioctx_table *table;
- if (atomic_xchg(&ctx->dead, 1))
+ spin_lock(&mm->ioctx_lock);
+ if (atomic_xchg(&ctx->dead, 1)) {
+ spin_unlock(&mm->ioctx_lock);
return -EINVAL;
+ }
-
- spin_lock(&mm->ioctx_lock);
table = rcu_dereference_raw(mm->ioctx_table);
WARN_ON(ctx != table->table[ctx->id]);
table->table[ctx->id] = NULL;
return -EINVAL;
}
- typedef ssize_t (aio_rw_op)(struct kiocb *, const struct iovec *,
- unsigned long, loff_t);
typedef ssize_t (rw_iter_op)(struct kiocb *, struct iov_iter *);
static int aio_setup_vectored_rw(int rw, char __user *buf, size_t len,
ssize_t ret;
int rw;
fmode_t mode;
- aio_rw_op *rw_op;
rw_iter_op *iter_op;
struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
struct iov_iter iter;
case IOCB_CMD_PREADV:
mode = FMODE_READ;
rw = READ;
- rw_op = file->f_op->aio_read;
iter_op = file->f_op->read_iter;
goto rw_common;
case IOCB_CMD_PWRITEV:
mode = FMODE_WRITE;
rw = WRITE;
- rw_op = file->f_op->aio_write;
iter_op = file->f_op->write_iter;
goto rw_common;
rw_common:
if (unlikely(!(file->f_mode & mode)))
return -EBADF;
- if (!rw_op && !iter_op)
+ if (!iter_op)
return -EINVAL;
if (opcode == IOCB_CMD_PREADV || opcode == IOCB_CMD_PWRITEV)
len = ret;
- /* XXX: move/kill - rw_verify_area()? */
- /* This matches the pread()/pwrite() logic */
- if (req->ki_pos < 0) {
- ret = -EINVAL;
- break;
- }
-
if (rw == WRITE)
file_start_write(file);
- if (iter_op) {
- ret = iter_op(req, &iter);
- } else {
- ret = rw_op(req, iter.iov, iter.nr_segs, req->ki_pos);
- }
+ ret = iter_op(req, &iter);
if (rw == WRITE)
file_end_write(file);
if (ret)
goto out_unlock;
- ret = gfs2_quota_lock_check(ip);
- if (ret)
- goto out_unlock;
gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks);
ap.target = data_blocks + ind_blocks;
+ ret = gfs2_quota_lock_check(ip, &ap);
+ if (ret)
+ goto out_unlock;
ret = gfs2_inplace_reserve(ip, &ap);
if (ret)
goto out_quota_unlock;
brelse(dibh);
return error;
}
-
-static void calc_max_reserv(struct gfs2_inode *ip, loff_t max, loff_t *len,
- unsigned int *data_blocks, unsigned int *ind_blocks)
+/**
+ * calc_max_reserv() - Reverse of write_calc_reserv. Given a number of
+ * blocks, determine how many bytes can be written.
+ * @ip: The inode in question.
+ * @len: Max cap of bytes. What we return in *len must be <= this.
+ * @data_blocks: Compute and return the number of data blocks needed
+ * @ind_blocks: Compute and return the number of indirect blocks needed
+ * @max_blocks: The total blocks available to work with.
+ *
+ * Returns: void, but @len, @data_blocks and @ind_blocks are filled in.
+ */
+static void calc_max_reserv(struct gfs2_inode *ip, loff_t *len,
+ unsigned int *data_blocks, unsigned int *ind_blocks,
+ unsigned int max_blocks)
{
+ loff_t max = *len;
const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
- unsigned int max_blocks = ip->i_rgd->rd_free_clone;
unsigned int tmp, max_data = max_blocks - 3 * (sdp->sd_max_height - 1);
for (tmp = max_data; tmp > sdp->sd_diptrs;) {
tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs);
max_data -= tmp;
}
- /* This calculation isn't the exact reverse of gfs2_write_calc_reserve,
- so it might end up with fewer data blocks */
- if (max_data <= *data_blocks)
- return;
+
*data_blocks = max_data;
*ind_blocks = max_blocks - max_data;
*len = ((loff_t)max_data - 3) << sdp->sd_sb.sb_bsize_shift;
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_alloc_parms ap = { .aflags = 0, };
unsigned int data_blocks = 0, ind_blocks = 0, rblocks;
- loff_t bytes, max_bytes;
+ loff_t bytes, max_bytes, max_blks = UINT_MAX;
int error;
const loff_t pos = offset;
const loff_t count = len;
gfs2_size_hint(file, offset, len);
+ gfs2_write_calc_reserv(ip, PAGE_SIZE, &data_blocks, &ind_blocks);
+ ap.min_target = data_blocks + ind_blocks;
+
while (len > 0) {
if (len < bytes)
bytes = len;
offset += bytes;
continue;
}
- error = gfs2_quota_lock_check(ip);
+
+ /* We need to determine how many bytes we can actually
+ * fallocate without exceeding quota or going over the
+ * end of the fs. We start off optimistically by assuming
+ * we can write max_bytes */
+ max_bytes = (len > max_chunk_size) ? max_chunk_size : len;
+
+ /* Since max_bytes is most likely a theoretical max, we
+ * calculate a more realistic 'bytes' to serve as a good
+ * starting point for the number of bytes we may be able
+ * to write */
+ gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks);
+ ap.target = data_blocks + ind_blocks;
+
+ error = gfs2_quota_lock_check(ip, &ap);
if (error)
return error;
-retry:
- gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks);
+ /* ap.allowed tells us how many blocks quota will allow
+ * us to write. Check if this reduces max_blks */
+ if (ap.allowed && ap.allowed < max_blks)
+ max_blks = ap.allowed;
- ap.target = data_blocks + ind_blocks;
error = gfs2_inplace_reserve(ip, &ap);
- if (error) {
- if (error == -ENOSPC && bytes > sdp->sd_sb.sb_bsize) {
- bytes >>= 1;
- bytes &= bsize_mask;
- if (bytes == 0)
- bytes = sdp->sd_sb.sb_bsize;
- goto retry;
- }
+ if (error)
goto out_qunlock;
- }
- max_bytes = bytes;
- calc_max_reserv(ip, (len > max_chunk_size)? max_chunk_size: len,
- &max_bytes, &data_blocks, &ind_blocks);
+
+ /* check if the selected rgrp limits our max_blks further */
+ if (ap.allowed && ap.allowed < max_blks)
+ max_blks = ap.allowed;
+
+ /* Almost done. Calculate bytes that can be written using
+ * max_blks. We also recompute max_bytes, data_blocks and
+ * ind_blocks */
+ calc_max_reserv(ip, &max_bytes, &data_blocks,
+ &ind_blocks, max_blks);
rblocks = RES_DINODE + ind_blocks + RES_STATFS + RES_QUOTA +
RES_RG_HDR + gfs2_rg_blocks(ip, data_blocks + ind_blocks);
return ret;
}
+static ssize_t gfs2_file_splice_write(struct pipe_inode_info *pipe,
+ struct file *out, loff_t *ppos,
+ size_t len, unsigned int flags)
+{
+ int error;
+ struct gfs2_inode *ip = GFS2_I(out->f_mapping->host);
+
+ error = gfs2_rs_alloc(ip);
+ if (error)
+ return (ssize_t)error;
+
+ gfs2_size_hint(out, *ppos, len);
+
+ return iter_file_splice_write(pipe, out, ppos, len, flags);
+}
+
#ifdef CONFIG_GFS2_FS_LOCKING_DLM
/**
const struct file_operations gfs2_file_fops = {
.llseek = gfs2_llseek,
- .read = new_sync_read,
.read_iter = generic_file_read_iter,
- .write = new_sync_write,
.write_iter = gfs2_file_write_iter,
.unlocked_ioctl = gfs2_ioctl,
.mmap = gfs2_mmap,
.lock = gfs2_lock,
.flock = gfs2_flock,
.splice_read = generic_file_splice_read,
- .splice_write = iter_file_splice_write,
+ .splice_write = gfs2_file_splice_write,
.setlease = simple_nosetlease,
.fallocate = gfs2_fallocate,
};
const struct file_operations gfs2_file_fops_nolock = {
.llseek = gfs2_llseek,
- .read = new_sync_read,
.read_iter = generic_file_read_iter,
- .write = new_sync_write,
.write_iter = gfs2_file_write_iter,
.unlocked_ioctl = gfs2_ioctl,
.mmap = gfs2_mmap,
.release = gfs2_release,
.fsync = gfs2_fsync,
.splice_read = generic_file_splice_read,
- .splice_write = iter_file_splice_write,
+ .splice_write = gfs2_file_splice_write,
.setlease = generic_setlease,
.fallocate = gfs2_fallocate,
};
#include <linux/security.h>
#include <linux/magic.h>
#include <linux/migrate.h>
+ #include <linux/uio.h>
#include <asm/uaccess.h>
}
#endif
- static int
+ static size_t
hugetlbfs_read_actor(struct page *page, unsigned long offset,
- char __user *buf, unsigned long count,
- unsigned long size)
+ struct iov_iter *to, unsigned long size)
{
- char *kaddr;
- unsigned long left, copied = 0;
+ size_t copied = 0;
int i, chunksize;
- if (size > count)
- size = count;
-
/* Find which 4k chunk and offset with in that chunk */
i = offset >> PAGE_CACHE_SHIFT;
offset = offset & ~PAGE_CACHE_MASK;
while (size) {
+ size_t n;
chunksize = PAGE_CACHE_SIZE;
if (offset)
chunksize -= offset;
if (chunksize > size)
chunksize = size;
- kaddr = kmap(&page[i]);
- left = __copy_to_user(buf, kaddr + offset, chunksize);
- kunmap(&page[i]);
- if (left) {
- copied += (chunksize - left);
- break;
- }
+ n = copy_page_to_iter(&page[i], offset, chunksize, to);
+ copied += n;
+ if (n != chunksize)
+ return copied;
offset = 0;
size -= chunksize;
- buf += chunksize;
- copied += chunksize;
i++;
}
- return copied ? copied : -EFAULT;
+ return copied;
}
/*
* data. Its *very* similar to do_generic_mapping_read(), we can't use that
* since it has PAGE_CACHE_SIZE assumptions.
*/
- static ssize_t hugetlbfs_read(struct file *filp, char __user *buf,
- size_t len, loff_t *ppos)
+ static ssize_t hugetlbfs_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
- struct hstate *h = hstate_file(filp);
- struct address_space *mapping = filp->f_mapping;
+ struct file *file = iocb->ki_filp;
+ struct hstate *h = hstate_file(file);
+ struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
- unsigned long index = *ppos >> huge_page_shift(h);
- unsigned long offset = *ppos & ~huge_page_mask(h);
+ unsigned long index = iocb->ki_pos >> huge_page_shift(h);
+ unsigned long offset = iocb->ki_pos & ~huge_page_mask(h);
unsigned long end_index;
loff_t isize;
ssize_t retval = 0;
- /* validate length */
- if (len == 0)
- goto out;
-
- for (;;) {
+ while (iov_iter_count(to)) {
struct page *page;
- unsigned long nr, ret;
- int ra;
+ size_t nr, copied;
/* nr is the maximum number of bytes to copy from this page */
nr = huge_page_size(h);
isize = i_size_read(inode);
if (!isize)
- goto out;
+ break;
end_index = (isize - 1) >> huge_page_shift(h);
- if (index >= end_index) {
- if (index > end_index)
- goto out;
+ if (index > end_index)
+ break;
+ if (index == end_index) {
nr = ((isize - 1) & ~huge_page_mask(h)) + 1;
if (nr <= offset)
- goto out;
+ break;
}
nr = nr - offset;
* We have a HOLE, zero out the user-buffer for the
* length of the hole or request.
*/
- ret = len < nr ? len : nr;
- if (clear_user(buf, ret))
- ra = -EFAULT;
- else
- ra = 0;
+ copied = iov_iter_zero(nr, to);
} else {
unlock_page(page);
/*
* We have the page, copy it to user space buffer.
*/
- ra = hugetlbfs_read_actor(page, offset, buf, len, nr);
- ret = ra;
+ copied = hugetlbfs_read_actor(page, offset, to, nr);
page_cache_release(page);
}
- if (ra < 0) {
- if (retval == 0)
- retval = ra;
- goto out;
+ offset += copied;
+ retval += copied;
+ if (copied != nr && iov_iter_count(to)) {
+ if (!retval)
+ retval = -EFAULT;
+ break;
}
-
- offset += ret;
- retval += ret;
- len -= ret;
index += offset >> huge_page_shift(h);
offset &= ~huge_page_mask(h);
-
- /* short read or no more work */
- if ((ret != nr) || (len == 0))
- break;
}
- out:
- *ppos = ((loff_t)index << huge_page_shift(h)) + offset;
+ iocb->ki_pos = ((loff_t)index << huge_page_shift(h)) + offset;
return retval;
}
static void truncate_huge_page(struct page *page)
{
- cancel_dirty_page(page, /* No IO accounting for huge pages? */0);
+ ClearPageDirty(page);
ClearPageUptodate(page);
delete_from_page_cache(page);
}
}
const struct file_operations hugetlbfs_file_operations = {
- .read = hugetlbfs_read,
+ .read_iter = hugetlbfs_read_iter,
.mmap = hugetlbfs_file_mmap,
.fsync = noop_fsync,
.get_unmapped_area = hugetlb_get_unmapped_area,
/*
* for completing the rest of the request.
*/
- *ppos += written;
count -= written;
written_buffered = generic_perform_write(file, from, *ppos);
/*
goto out_dio;
}
- iocb->ki_pos = *ppos + written_buffered;
/* We need to ensure that the page cache pages are written to
* disk and invalidated to preserve the expected O_DIRECT
* semantics.
ret = filemap_write_and_wait_range(file->f_mapping, *ppos,
endbyte);
if (ret == 0) {
+ iocb->ki_pos = *ppos + written_buffered;
written += written_buffered;
invalidate_mapping_pages(mapping,
*ppos >> PAGE_CACHE_SHIFT,
/* buffered aio wouldn't have proper lock coverage today */
BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
+ if (unlikely(written <= 0))
+ goto no_sync;
+
if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) ||
((file->f_flags & O_DIRECT) && !direct_io)) {
- ret = filemap_fdatawrite_range(file->f_mapping, *ppos,
- *ppos + count - 1);
+ ret = filemap_fdatawrite_range(file->f_mapping,
+ iocb->ki_pos - written,
+ iocb->ki_pos - 1);
if (ret < 0)
written = ret;
}
if (!ret)
- ret = filemap_fdatawait_range(file->f_mapping, *ppos,
- *ppos + count - 1);
+ ret = filemap_fdatawait_range(file->f_mapping,
+ iocb->ki_pos - written,
+ iocb->ki_pos - 1);
}
+no_sync:
/*
* deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
* function pointer which is called when o_direct io completes so that
*/
const struct file_operations ocfs2_fops = {
.llseek = ocfs2_file_llseek,
- .read = new_sync_read,
- .write = new_sync_write,
.mmap = ocfs2_mmap,
.fsync = ocfs2_sync_file,
.release = ocfs2_file_release,
*/
const struct file_operations ocfs2_fops_no_plocks = {
.llseek = ocfs2_file_llseek,
- .read = new_sync_read,
- .write = new_sync_write,
.mmap = ocfs2_mmap,
.fsync = ocfs2_sync_file,
.release = ocfs2_file_release,
loff_t (*llseek) (struct file *, loff_t, int);
ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
- ssize_t (*aio_read) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
- ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
ssize_t (*read_iter) (struct kiocb *, struct iov_iter *);
ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);
int (*iterate) (struct file *, struct dir_context *);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
- void (*mremap)(struct file *, struct vm_area_struct *);
+ int (*mremap)(struct file *, struct vm_area_struct *);
int (*open) (struct inode *, struct file *);
int (*flush) (struct file *, fl_owner_t id);
int (*release) (struct inode *, struct file *);
struct iovec **ret_pointer);
extern ssize_t __vfs_read(struct file *, char __user *, size_t, loff_t *);
+ extern ssize_t __vfs_write(struct file *, const char __user *, size_t, loff_t *);
extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
extern ssize_t vfs_readv(struct file *, const struct iovec __user *,
extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);
extern ssize_t generic_file_direct_write(struct kiocb *, struct iov_iter *, loff_t);
extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t);
- extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
- extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
- extern ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
- extern ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos);
ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos);
OSDN Git Service
