bool elf32;
u32 flags;
int ret;
+ loff_t pos;
elf32 = ehdr->e32.e_ident[EI_CLASS] == ELFCLASS32;
flags = elf32 ? ehdr->e32.e_flags : ehdr->e64.e_flags;
if (phdr32->p_filesz < sizeof(abiflags))
return -EINVAL;
-
- ret = kernel_read(elf, phdr32->p_offset,
- (char *)&abiflags,
- sizeof(abiflags));
+ pos = phdr32->p_offset;
} else {
if (phdr64->p_type != PT_MIPS_ABIFLAGS)
return 0;
if (phdr64->p_filesz < sizeof(abiflags))
return -EINVAL;
-
- ret = kernel_read(elf, phdr64->p_offset,
- (char *)&abiflags,
- sizeof(abiflags));
+ pos = phdr64->p_offset;
}
+ ret = kernel_read(elf, &abiflags, sizeof(abiflags), &pos);
if (ret < 0)
return ret;
if (ret != sizeof(abiflags))
}
do {
- loff_t pos = file->f_pos;
- mm_segment_t old_fs = get_fs();
- set_fs(KERNEL_DS);
- len = vfs_read(file, buf, PAGE_SIZE - 1, &pos);
- set_fs(old_fs);
- file->f_pos = pos;
+ len = kernel_read(file, buf, PAGE_SIZE - 1, &file->f_pos);
if (len < 0) {
mconsole_reply(req, "Read of file failed", 1, 0);
goto out_free;
unsigned long bss, start_addr, len, error;
int retval;
struct exec ex;
-
+ loff_t pos = 0;
retval = -ENOEXEC;
- error = kernel_read(file, 0, (char *) &ex, sizeof(ex));
+ error = kernel_read(file, &ex, sizeof(ex), &pos);
if (error != sizeof(ex))
goto out;
p = (char *)dev->_audiodata_buf_virt_addr + frame_offset;
for (i = 0; i < dev->_audio_lines_count; i++) {
- int n = kernel_read(file, file_offset, mybuf, AUDIO_LINE_SIZE);
+ int n = kernel_read(file, mybuf, AUDIO_LINE_SIZE, &file_offset);
if (n < AUDIO_LINE_SIZE) {
pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
__func__);
memcpy(p, mybuf, n);
p += n;
}
- file_offset += n;
}
dev->_audioframe_count++;
fput(file);
{
char *p = (void *)dev->_audiodata_buf_virt_addr;
struct file *file;
- loff_t offset;
+ loff_t file_offset = 0;
int i, j;
file = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
return PTR_ERR(file);
}
- for (j = 0, offset = 0; j < NUM_AUDIO_FRAMES; j++) {
+ for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
for (i = 0; i < dev->_audio_lines_count; i++) {
char buf[AUDIO_LINE_SIZE];
- int n = kernel_read(file, offset, buf,
- AUDIO_LINE_SIZE);
+ loff_t offset = file_offset;
+ int n = kernel_read(file, buf, AUDIO_LINE_SIZE, &file_offset);
if (n < AUDIO_LINE_SIZE) {
pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
if (p)
memcpy(p + offset, buf, n);
-
- offset += n;
}
dev->_audioframe_count++;
}
if (err)
return err;
noreclaim_flag = memalloc_noreclaim_save();
- tx = kernel_read(file, pos, buf, count);
+ tx = kernel_read(file, buf, count, &pos);
memalloc_noreclaim_restore(noreclaim_flag);
put_pages(ns);
return tx;
if (err)
return err;
noreclaim_flag = memalloc_noreclaim_save();
- tx = kernel_write(file, buf, count, pos);
+ tx = kernel_write(file, buf, count, &pos);
memalloc_noreclaim_restore(noreclaim_flag);
put_pages(ns);
return tx;
return 0;
}
-/**
- * ashmem_read() - Reads a set of bytes from an Ashmem-enabled file
- * @file: The associated backing file.
- * @buf: The buffer of data being written to
- * @len: The number of bytes being read
- * @pos: The position of the first byte to read.
- *
- * Return: 0 if successful, or another return code if not.
- */
-static ssize_t ashmem_read(struct file *file, char __user *buf,
- size_t len, loff_t *pos)
+static ssize_t ashmem_read_iter(struct kiocb *iocb, struct iov_iter *iter)
{
- struct ashmem_area *asma = file->private_data;
+ struct ashmem_area *asma = iocb->ki_filp->private_data;
int ret = 0;
mutex_lock(&ashmem_mutex);
goto out_unlock;
}
- mutex_unlock(&ashmem_mutex);
-
/*
* asma and asma->file are used outside the lock here. We assume
* once asma->file is set it will never be changed, and will not
* be destroyed until all references to the file are dropped and
* ashmem_release is called.
*/
- ret = __vfs_read(asma->file, buf, len, pos);
- if (ret >= 0)
- /** Update backing file pos, since f_ops->read() doesn't */
- asma->file->f_pos = *pos;
- return ret;
-
+ mutex_unlock(&ashmem_mutex);
+ ret = vfs_iter_read(asma->file, iter, &iocb->ki_pos, 0);
+ mutex_lock(&ashmem_mutex);
+ if (ret > 0)
+ asma->file->f_pos = iocb->ki_pos;
out_unlock:
mutex_unlock(&ashmem_mutex);
return ret;
.owner = THIS_MODULE,
.open = ashmem_open,
.release = ashmem_release,
- .read = ashmem_read,
+ .read_iter = ashmem_read_iter,
.llseek = ashmem_llseek,
.mmap = ashmem_mmap,
.unlocked_ioctl = ashmem_ioctl,
static int serial2002_tty_write(struct file *f, unsigned char *buf, int count)
{
- 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);
- result = __vfs_write(f, p, count, &offset);
- set_fs(oldfs);
- return result;
+ loff_t pos = 0;
+ return kernel_write(f, buf, count, &pos);
}
static void serial2002_tty_read_poll_wait(struct file *f, int timeout)
{
unsigned char ch;
int result;
+ loff_t pos = 0;
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 (__vfs_read(f, p, 1, &offset) == 1)
+ if (kernel_read(f, &ch, 1, &pos) == 1)
result = ch;
} else {
/* Device does not support poll, busy wait */
if (retries >= timeout)
break;
- if (__vfs_read(f, p, 1, &offset) == 1) {
+ if (kernel_read(f, &ch, 1, &pos) == 1) {
result = ch;
break;
}
usleep_range(100, 1000);
}
}
- set_fs(oldfs);
}
return result;
}
__LASSERT_TAGE_INVARIANT(tage);
buf = kmap(tage->page);
- rc = vfs_write(filp, (__force const char __user *)buf,
- tage->used, &filp->f_pos);
+ rc = kernel_write(filp, buf, tage->used, &filp->f_pos);
kunmap(tage->page);
if (rc != (int)tage->used) {
struct tracefiled_ctl *tctl = arg;
struct cfs_trace_page *tage;
struct cfs_trace_page *tmp;
- mm_segment_t __oldfs;
struct file *filp;
char *buf;
int last_loop = 0;
__LASSERT(list_empty(&pc.pc_pages));
goto end_loop;
}
- __oldfs = get_fs();
- set_fs(get_ds());
list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
static loff_t f_pos;
f_pos = i_size_read(file_inode(filp));
buf = kmap(tage->page);
- rc = vfs_write(filp, (__force const char __user *)buf,
- tage->used, &f_pos);
+ rc = kernel_write(filp, buf, tage->used, &f_pos);
kunmap(tage->page);
if (rc != (int)tage->used) {
break;
}
}
- set_fs(__oldfs);
filp_close(filp, NULL);
put_pages_on_daemon_list(&pc);
struct kuc_hdr *kuch = (struct kuc_hdr *)payload;
ssize_t count = kuch->kuc_msglen;
loff_t offset = 0;
- mm_segment_t fs;
int rc = -ENXIO;
if (IS_ERR_OR_NULL(filp))
return rc;
}
- fs = get_fs();
- set_fs(KERNEL_DS);
while (count > 0) {
- rc = vfs_write(filp, (void __force __user *)payload,
- count, &offset);
+ rc = kernel_write(filp, payload, count, &offset);
if (rc < 0)
break;
count -= rc;
payload += rc;
rc = 0;
}
- set_fs(fs);
if (rc < 0)
CWARN("message send failed (%d)\n", rc);
u32 md_buf_len)
{
struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600);
+ loff_t pos = 0;
int ret;
if (IS_ERR(file)) {
pr_err("filp_open(%s) for ALUA metadata failed\n", path);
return -ENODEV;
}
- ret = kernel_write(file, md_buf, md_buf_len, 0);
+ ret = kernel_write(file, md_buf, md_buf_len, &pos);
if (ret < 0)
pr_err("Error writing ALUA metadata file: %s\n", path);
fput(file);
for (prot = 0; prot < prot_length;) {
sector_t len = min_t(sector_t, bufsize, prot_length - prot);
- ssize_t ret = kernel_write(prot_fd, buf, len, pos + prot);
+ ssize_t ret = kernel_write(prot_fd, buf, len, &pos);
if (ret != len) {
pr_err("vfs_write to prot file failed: %zd\n", ret);
char path[512];
u32 pr_aptpl_buf_len;
int ret;
+ loff_t pos = 0;
memset(path, 0, 512);
pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */
- ret = kernel_write(file, buf, pr_aptpl_buf_len, 0);
+ ret = kernel_write(file, buf, pr_aptpl_buf_len, &pos);
if (ret < 0)
pr_debug("Error writing APTPL metadata file: %s\n", path);
/* Perform the read */
file_offset_tmp = file_offset;
- nread = vfs_read(curlun->filp,
- (char __user *)bh->buf,
- amount, &file_offset_tmp);
+ nread = kernel_read(curlun->filp, bh->buf, amount,
+ &file_offset_tmp);
VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
(unsigned long long)file_offset, (int)nread);
if (signal_pending(current))
/* Perform the write */
file_offset_tmp = file_offset;
- nwritten = vfs_write(curlun->filp, (char __user *)bh->buf,
- amount, &file_offset_tmp);
+ nwritten = kernel_write(curlun->filp, bh->buf, amount,
+ &file_offset_tmp);
VLDBG(curlun, "file write %u @ %llu -> %d\n", amount,
(unsigned long long)file_offset, (int)nwritten);
if (signal_pending(current))
/* Perform the read */
file_offset_tmp = file_offset;
- nread = vfs_read(curlun->filp,
- (char __user *) bh->buf,
- amount, &file_offset_tmp);
+ nread = kernel_read(curlun->filp, bh->buf, amount,
+ &file_offset_tmp);
VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
(unsigned long long) file_offset,
(int) nread);
/* Allow the thread to be frozen */
set_freezable();
- /*
- * Arrange for userspace references to be interpreted as kernel
- * pointers. That way we can pass a kernel pointer to a routine
- * that expects a __user pointer and it will work okay.
- */
- set_fs(get_ds());
-
/* The main loop */
while (common->state != FSG_STATE_TERMINATED) {
if (exception_in_progress(common) || signal_pending(current)) {
struct file *file, const void *addr, int bytes)
{
unsigned long sigpipe, flags;
- mm_segment_t fs;
const char *data = (const char *)addr;
ssize_t wr = 0;
sigpipe = sigismember(¤t->pending.signal, SIGPIPE);
- /* Save pointer to user space and point back to kernel space */
- fs = get_fs();
- set_fs(KERNEL_DS);
-
mutex_lock(&sbi->pipe_mutex);
while (bytes) {
- wr = __vfs_write(file, data, bytes, &file->f_pos);
+ wr = __kernel_write(file, data, bytes, &file->f_pos);
if (wr <= 0)
break;
data += wr;
}
mutex_unlock(&sbi->pipe_mutex);
- set_fs(fs);
-
/* Keep the currently executing process from receiving a
* SIGPIPE unless it was already supposed to get one
*/
unsigned long error;
int retval;
struct exec ex;
+ loff_t pos = 0;
inode = file_inode(file);
retval = -ENOEXEC;
- error = kernel_read(file, 0, (char *) &ex, sizeof(ex));
+ error = kernel_read(file, &ex, sizeof(ex), &pos);
if (error != sizeof(ex))
goto out;
{
struct elf_phdr *elf_phdata = NULL;
int retval, size, err = -1;
+ loff_t pos = elf_ex->e_phoff;
/*
* If the size of this structure has changed, then punt, since
goto out;
/* Read in the program headers */
- retval = kernel_read(elf_file, elf_ex->e_phoff,
- (char *)elf_phdata, size);
+ retval = kernel_read(elf_file, elf_phdata, size, &pos);
if (retval != size) {
err = (retval < 0) ? retval : -EIO;
goto out;
struct elfhdr interp_elf_ex;
} *loc;
struct arch_elf_state arch_state = INIT_ARCH_ELF_STATE;
+ loff_t pos;
loc = kmalloc(sizeof(*loc), GFP_KERNEL);
if (!loc) {
if (!elf_interpreter)
goto out_free_ph;
- retval = kernel_read(bprm->file, elf_ppnt->p_offset,
- elf_interpreter,
- elf_ppnt->p_filesz);
+ pos = elf_ppnt->p_offset;
+ retval = kernel_read(bprm->file, elf_interpreter,
+ elf_ppnt->p_filesz, &pos);
if (retval != elf_ppnt->p_filesz) {
if (retval >= 0)
retval = -EIO;
would_dump(bprm, interpreter);
/* Get the exec headers */
- retval = kernel_read(interpreter, 0,
- (void *)&loc->interp_elf_ex,
- sizeof(loc->interp_elf_ex));
+ pos = 0;
+ retval = kernel_read(interpreter, &loc->interp_elf_ex,
+ sizeof(loc->interp_elf_ex), &pos);
if (retval != sizeof(loc->interp_elf_ex)) {
if (retval >= 0)
retval = -EIO;
unsigned long elf_bss, bss, len;
int retval, error, i, j;
struct elfhdr elf_ex;
+ loff_t pos = 0;
error = -ENOEXEC;
- retval = kernel_read(file, 0, (char *)&elf_ex, sizeof(elf_ex));
+ retval = kernel_read(file, &elf_ex, sizeof(elf_ex), &pos);
if (retval != sizeof(elf_ex))
goto out;
eppnt = elf_phdata;
error = -ENOEXEC;
- retval = kernel_read(file, elf_ex.e_phoff, (char *)eppnt, j);
+ pos = elf_ex.e_phoff;
+ retval = kernel_read(file, eppnt, j, &pos);
if (retval != j)
goto out_free_ph;
struct elf32_phdr *phdr;
unsigned long size;
int retval, loop;
+ loff_t pos = params->hdr.e_phoff;
if (params->hdr.e_phentsize != sizeof(struct elf_phdr))
return -ENOMEM;
if (!params->phdrs)
return -ENOMEM;
- retval = kernel_read(file, params->hdr.e_phoff,
- (char *) params->phdrs, size);
+ retval = kernel_read(file, params->phdrs, size, &pos);
if (unlikely(retval != size))
return retval < 0 ? retval : -ENOEXEC;
char *interpreter_name = NULL;
int executable_stack;
int retval, i;
+ loff_t pos;
kdebug("____ LOAD %d ____", current->pid);
if (!interpreter_name)
goto error;
- retval = kernel_read(bprm->file,
- phdr->p_offset,
- interpreter_name,
- phdr->p_filesz);
+ pos = phdr->p_offset;
+ retval = kernel_read(bprm->file, interpreter_name,
+ phdr->p_filesz, &pos);
if (unlikely(retval != phdr->p_filesz)) {
if (retval >= 0)
retval = -ENOEXEC;
*/
would_dump(bprm, interpreter);
- retval = kernel_read(interpreter, 0, bprm->buf,
- BINPRM_BUF_SIZE);
+ pos = 0;
+ retval = kernel_read(interpreter, bprm->buf,
+ BINPRM_BUF_SIZE, &pos);
if (unlikely(retval != BINPRM_BUF_SIZE)) {
if (retval >= 0)
retval = -ENOEXEC;
#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
#define RESERVED 0xC0 /* bit 6,7: reserved */
-static int decompress_exec(
- struct linux_binprm *bprm,
- unsigned long offset,
- char *dst,
- long len,
- int fd)
+static int decompress_exec(struct linux_binprm *bprm, loff_t fpos, char *dst,
+ long len, int fd)
{
unsigned char *buf;
z_stream strm;
- loff_t fpos;
int ret, retval;
- pr_debug("decompress_exec(offset=%lx,buf=%p,len=%lx)\n", offset, dst, len);
+ pr_debug("decompress_exec(offset=%llx,buf=%p,len=%lx)\n", fpos, dst, len);
memset(&strm, 0, sizeof(strm));
strm.workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
}
/* Read in first chunk of data and parse gzip header. */
- fpos = offset;
- ret = kernel_read(bprm->file, offset, buf, LBUFSIZE);
+ ret = kernel_read(bprm->file, buf, LBUFSIZE, &fpos);
strm.next_in = buf;
strm.avail_in = ret;
strm.total_in = 0;
- fpos += ret;
retval = -ENOEXEC;
}
while ((ret = zlib_inflate(&strm, Z_NO_FLUSH)) == Z_OK) {
- ret = kernel_read(bprm->file, fpos, buf, LBUFSIZE);
+ ret = kernel_read(bprm->file, buf, LBUFSIZE, &fpos);
if (ret <= 0)
break;
len -= ret;
strm.next_in = buf;
strm.avail_in = ret;
strm.total_in = 0;
- fpos += ret;
}
if (ret < 0) {
bprm->file = interp_file;
if (fmt->flags & MISC_FMT_CREDENTIALS) {
+ loff_t pos = 0;
+
/*
* No need to call prepare_binprm(), it's already been
* done. bprm->buf is stale, update from interp_file.
*/
memset(bprm->buf, 0, BINPRM_BUF_SIZE);
- retval = kernel_read(bprm->file, 0, bprm->buf, BINPRM_BUF_SIZE);
+ retval = kernel_read(bprm->file, bprm->buf, BINPRM_BUF_SIZE,
+ &pos);
} else
retval = prepare_binprm(bprm);
static int write_buf(struct file *filp, const void *buf, u32 len, loff_t *off)
{
int ret;
- mm_segment_t old_fs;
u32 pos = 0;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
-
while (pos < len) {
- ret = vfs_write(filp, (__force const char __user *)buf + pos,
- len - pos, off);
+ ret = kernel_write(filp, buf + pos, len - pos, off);
/* TODO handle that correctly */
/*if (ret == -ERESTARTSYS) {
continue;
}*/
if (ret < 0)
- goto out;
+ return ret;
if (ret == 0) {
- ret = -EIO;
- goto out;
+ return -EIO;
}
pos += ret;
}
- ret = 0;
-
-out:
- set_fs(old_fs);
- return ret;
+ return 0;
}
static int tlv_put(struct send_ctx *sctx, u16 attr, const void *data, int len)
goto out;
while (1) {
+ loff_t pos = ctx->pos - 2;
+
/* read entries from the directory file */
- ret = kernel_read(host_file, ctx->pos - 2, (char *)vdir,
- sizeof(*vdir));
+ ret = kernel_read(host_file, vdir, sizeof(*vdir), &pos);
if (ret < 0) {
pr_err("%s: read dir %s failed %d\n",
__func__, coda_f2s(&cii->c_fid), ret);
lower_file = ecryptfs_inode_to_private(ecryptfs_inode)->lower_file;
if (!lower_file)
return -EIO;
- rc = kernel_write(lower_file, data, size, offset);
+ rc = kernel_write(lower_file, data, size, &offset);
mark_inode_dirty_sync(ecryptfs_inode);
return rc;
}
lower_file = ecryptfs_inode_to_private(ecryptfs_inode)->lower_file;
if (!lower_file)
return -EIO;
- return kernel_read(lower_file, offset, data, size);
+ return kernel_read(lower_file, data, size, &offset);
}
/**
}
EXPORT_SYMBOL(open_exec);
-int kernel_read(struct file *file, loff_t offset,
- char *addr, unsigned long count)
-{
- mm_segment_t old_fs;
- loff_t pos = offset;
- int result;
-
- old_fs = get_fs();
- set_fs(get_ds());
- /* The cast to a user pointer is valid due to the set_fs() */
- result = vfs_read(file, (void __user *)addr, count, &pos);
- set_fs(old_fs);
- return result;
-}
-
-EXPORT_SYMBOL(kernel_read);
-
int kernel_read_file(struct file *file, void **buf, loff_t *size,
loff_t max_size, enum kernel_read_file_id id)
{
pos = 0;
while (pos < i_size) {
- bytes = kernel_read(file, pos, (char *)(*buf) + pos,
- i_size - pos);
+ bytes = kernel_read(file, *buf + pos, i_size - pos, &pos);
if (bytes < 0) {
ret = bytes;
goto out;
if (bytes == 0)
break;
- pos += bytes;
}
if (pos != i_size) {
int prepare_binprm(struct linux_binprm *bprm)
{
int retval;
+ loff_t pos = 0;
bprm_fill_uid(bprm);
bprm->called_set_creds = 1;
memset(bprm->buf, 0, BINPRM_BUF_SIZE);
- return kernel_read(bprm->file, 0, bprm->buf, BINPRM_BUF_SIZE);
+ return kernel_read(bprm->file, bprm->buf, BINPRM_BUF_SIZE, &pos);
}
EXPORT_SYMBOL(prepare_binprm);
else
return -EINVAL;
}
-EXPORT_SYMBOL(__vfs_read);
+
+ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
+{
+ mm_segment_t old_fs;
+ ssize_t result;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ /* The cast to a user pointer is valid due to the set_fs() */
+ result = vfs_read(file, (void __user *)buf, count, pos);
+ set_fs(old_fs);
+ return result;
+}
+EXPORT_SYMBOL(kernel_read);
ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
{
return ret;
}
-EXPORT_SYMBOL(vfs_read);
-
static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
{
struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
else
return -EINVAL;
}
-EXPORT_SYMBOL(__vfs_write);
-ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t *pos)
+ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
{
mm_segment_t old_fs;
const char __user *p;
inc_syscw(current);
return ret;
}
-
EXPORT_SYMBOL(__kernel_write);
+ssize_t kernel_write(struct file *file, const void *buf, size_t count,
+ loff_t *pos)
+{
+ mm_segment_t old_fs;
+ ssize_t res;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ /* The cast to a user pointer is valid due to the set_fs() */
+ res = vfs_write(file, (__force const char __user *)buf, count, pos);
+ set_fs(old_fs);
+
+ return res;
+}
+EXPORT_SYMBOL(kernel_write);
+
ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;
return ret;
}
-EXPORT_SYMBOL(vfs_write);
-
static inline loff_t file_pos_read(struct file *file)
{
return file->f_pos;
return ret;
}
-EXPORT_SYMBOL(vfs_readv);
-ssize_t vfs_writev(struct file *file, const struct iovec __user *vec,
+static ssize_t vfs_writev(struct file *file, const struct iovec __user *vec,
unsigned long vlen, loff_t *pos, rwf_t flags)
{
struct iovec iovstack[UIO_FASTIOV];
}
return ret;
}
-EXPORT_SYMBOL(vfs_writev);
static ssize_t do_readv(unsigned long fd, const struct iovec __user *vec,
unsigned long vlen, rwf_t flags)
return res;
}
-ssize_t kernel_write(struct file *file, const char *buf, size_t count,
- loff_t pos)
-{
- mm_segment_t old_fs;
- ssize_t res;
-
- old_fs = get_fs();
- set_fs(get_ds());
- /* The cast to a user pointer is valid due to the set_fs() */
- res = vfs_write(file, (__force const char __user *)buf, count, &pos);
- set_fs(old_fs);
-
- return res;
-}
-EXPORT_SYMBOL(kernel_write);
-
static ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
struct pipe_inode_info *pipe, size_t len,
unsigned int flags)
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 *,
unsigned long, loff_t *, rwf_t);
-extern ssize_t vfs_writev(struct file *, const struct iovec __user *,
- unsigned long, loff_t *, rwf_t);
extern ssize_t vfs_copy_file_range(struct file *, loff_t , struct file *,
loff_t, size_t, unsigned int);
extern int vfs_clone_file_prep_inodes(struct inode *inode_in, loff_t pos_in,
return kernel_read_file_str[id];
}
-extern int kernel_read(struct file *, loff_t, char *, unsigned long);
extern int kernel_read_file(struct file *, void **, loff_t *, loff_t,
enum kernel_read_file_id);
extern int kernel_read_file_from_path(char *, void **, loff_t *, loff_t,
enum kernel_read_file_id);
extern int kernel_read_file_from_fd(int, void **, loff_t *, loff_t,
enum kernel_read_file_id);
-extern ssize_t kernel_write(struct file *, const char *, size_t, loff_t);
-extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
+extern ssize_t kernel_read(struct file *, void *, size_t, loff_t *);
+extern ssize_t kernel_write(struct file *, const void *, size_t, loff_t *);
+extern ssize_t __kernel_write(struct file *, const void *, size_t, loff_t *);
extern struct file * open_exec(const char *);
/* fs/dcache.c -- generic fs support functions */
if (file_start_write_trylock(file)) {
/* it's been opened O_APPEND, so position is irrelevant */
loff_t pos = 0;
- __kernel_write(file, (char *)&ac, sizeof(acct_t), &pos);
+ __kernel_write(file, &ac, sizeof(acct_t), &pos);
file_end_write(file);
}
out:
size_t length = oldlen / sizeof(*vec);
char *str, *end;
int i;
+ loff_t pos = 0;
- result = kernel_read(file, 0, buffer, BUFSZ - 1);
+ result = kernel_read(file, buffer, BUFSZ - 1, &pos);
if (result < 0)
goto out_kfree;
size_t length = newlen / sizeof(*vec);
char *str, *end;
int i;
+ loff_t pos = 0;
str = buffer;
end = str + BUFSZ;
str += scnprintf(str, end - str, "%lu\t", value);
}
- result = kernel_write(file, buffer, str - buffer, 0);
+ result = kernel_write(file, buffer, str - buffer, &pos);
if (result < 0)
goto out_kfree;
}
size_t length = oldlen / sizeof(*vec);
char *str, *end;
int i;
+ loff_t pos = 0;
- result = kernel_read(file, 0, buffer, BUFSZ - 1);
+ result = kernel_read(file, buffer, BUFSZ - 1, &pos);
if (result < 0)
goto out_kfree;
size_t length = newlen / sizeof(*vec);
char *str, *end;
int i;
+ loff_t pos = 0;
str = buffer;
end = str + BUFSZ;
str += scnprintf(str, end - str, "%lu\t", value);
}
- result = kernel_write(file, buffer, str - buffer, 0);
+ result = kernel_write(file, buffer, str - buffer, &pos);
if (result < 0)
goto out_kfree;
}
if (oldval && oldlen) {
char buf[UUID_STRING_LEN + 1];
uuid_t uuid;
+ loff_t pos = 0;
- result = kernel_read(file, 0, buf, sizeof(buf) - 1);
+ result = kernel_read(file, buf, sizeof(buf) - 1, &pos);
if (result < 0)
goto out;
char buf[15], *nodep;
unsigned long area, node;
__le16 dnaddr;
+ loff_t pos = 0;
- result = kernel_read(file, 0, buf, sizeof(buf) - 1);
+ result = kernel_read(file, buf, sizeof(buf) - 1, &pos);
if (result < 0)
goto out;
__le16 dnaddr;
char buf[15];
int len;
+ loff_t pos = 0;
result = -EINVAL;
if (newlen != sizeof(dnaddr))
le16_to_cpu(dnaddr) >> 10,
le16_to_cpu(dnaddr) & 0x3ff);
- result = kernel_write(file, buf, len, 0);
+ result = kernel_write(file, buf, len, &pos);
if (result < 0)
goto out;
}
if (vma->vm_file) {
/* read the contents of a file into the copy */
- mm_segment_t old_fs;
loff_t fpos;
fpos = vma->vm_pgoff;
fpos <<= PAGE_SHIFT;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- ret = __vfs_read(vma->vm_file, base, len, &fpos);
- set_fs(old_fs);
-
+ ret = kernel_read(vma->vm_file, base, len, &fpos);
if (ret < 0)
goto error_free;
{
int ret;
struct p9_trans_fd *ts = NULL;
+ loff_t pos;
if (client && client->status != Disconnected)
ts = client->trans;
if (!(ts->rd->f_flags & O_NONBLOCK))
p9_debug(P9_DEBUG_ERROR, "blocking read ...\n");
- ret = kernel_read(ts->rd, ts->rd->f_pos, v, len);
+ pos = ts->rd->f_pos;
+ ret = kernel_read(ts->rd, v, len, &pos);
if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
client->status = Disconnected;
return ret;
static int p9_fd_write(struct p9_client *client, void *v, int len)
{
- int ret;
- mm_segment_t oldfs;
+ ssize_t ret;
struct p9_trans_fd *ts = NULL;
if (client && client->status != Disconnected)
if (!(ts->wr->f_flags & O_NONBLOCK))
p9_debug(P9_DEBUG_ERROR, "blocking write ...\n");
- oldfs = get_fs();
- set_fs(get_ds());
- /* The cast to a user pointer is valid due to the set_fs() */
- ret = vfs_write(ts->wr, (__force void __user *)v, len, &ts->wr->f_pos);
- set_fs(oldfs);
-
+ ret = kernel_write(ts->wr, v, len, &ts->wr->f_pos);
if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
client->status = Disconnected;
return ret;
* File content is stored encrypted with randomly generated key.
*/
size_t enclen = ALIGN(datalen, crypto_skcipher_blocksize(big_key_skcipher));
+ loff_t pos = 0;
/* prepare aligned data to encrypt */
data = kmalloc(enclen, GFP_KERNEL);
goto err_enckey;
}
- written = kernel_write(file, data, enclen, 0);
+ written = kernel_write(file, data, enclen, &pos);
if (written != enclen) {
ret = written;
if (written >= 0)
u8 *data;
u8 *enckey = (u8 *)key->payload.data[big_key_data];
size_t enclen = ALIGN(datalen, crypto_skcipher_blocksize(big_key_skcipher));
+ loff_t pos = 0;
data = kmalloc(enclen, GFP_KERNEL);
if (!data)
}
/* read file to kernel and decrypt */
- ret = kernel_read(file, 0, data, enclen);
+ ret = kernel_read(file, data, enclen, &pos);
if (ret >= 0 && ret != enclen) {
ret = -EIO;
goto err_fput;
projects / mirror_ubuntu-kernels.git / commitdiff