redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

fs: fix kernel_read prototype 

Use proper ssize_t and size_t types for the return value and count
argument, move the offset last and make it an in/out argument like
all other read/write helpers, and make the buf argument a void pointer
to get rid of lots of casts in the callers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
zero-colors
Christoph Hellwig 2017-09-01 17:39:13 +02:00 committed by Al Viro
parent c41fbad015
commit bdd1d2d3d2
17 changed files with 69 additions and 71 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/mips/kernel/elf.c
View File

@ -87,6 +87,7 @@ int arch_elf_pt_proc(void *_ehdr, void *_phdr, struct file *elf,
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;
@ -108,21 +109,16 @@ int arch_elf_pt_proc(void *_ehdr, void *_phdr, struct file *elf,
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))

4
arch/x86/ia32/ia32_aout.c
View File

@ -407,10 +407,10 @@ static int load_aout_library(struct file *file)
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;

13
drivers/media/pci/cx25821/cx25821-audio-upstream.c
View File

@ -277,7 +277,7 @@ static int cx25821_get_audio_data(struct cx25821_dev *dev,
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__);
@ -290,7 +290,6 @@ static int cx25821_get_audio_data(struct cx25821_dev *dev,
memcpy(p, mybuf, n);
p += n;
}
file_offset += n;
}
dev->_audioframe_count++;
fput(file);
@ -318,7 +317,7 @@ static int cx25821_openfile_audio(struct cx25821_dev *dev,
{
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);
@ -328,11 +327,11 @@ static int cx25821_openfile_audio(struct cx25821_dev *dev,
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",
@ -344,8 +343,6 @@ static int cx25821_openfile_audio(struct cx25821_dev *dev,
if (p)
memcpy(p + offset, buf, n);
offset += n;
}
dev->_audioframe_count++;
}

2
drivers/mtd/nand/nandsim.c
View File

@ -1379,7 +1379,7 @@ static ssize_t read_file(struct nandsim *ns, struct file *file, void *buf, size_
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;

3
fs/binfmt_aout.c
View File

@ -341,11 +341,12 @@ static int load_aout_library(struct file *file)
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;

23
fs/binfmt_elf.c
View File

@ -409,6 +409,7 @@ static struct elf_phdr *load_elf_phdrs(struct elfhdr *elf_ex,
{
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
@ -432,8 +433,7 @@ static struct elf_phdr *load_elf_phdrs(struct elfhdr *elf_ex,
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;
@ -698,6 +698,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
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) {
@ -750,9 +751,9 @@ static int load_elf_binary(struct linux_binprm *bprm)
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;
@ -776,9 +777,9 @@ static int load_elf_binary(struct linux_binprm *bprm)
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;
@ -1175,9 +1176,10 @@ static int load_elf_library(struct file *file)
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;
@ -1201,7 +1203,8 @@ static int load_elf_library(struct file *file)
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;

17
fs/binfmt_elf_fdpic.c
View File

@ -145,6 +145,7 @@ static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params,
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;
@ -156,8 +157,7 @@ static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params,
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;
@ -199,6 +199,7 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm)
char *interpreter_name = NULL;
int executable_stack;
int retval, i;
loff_t pos;
kdebug("____ LOAD %d ____", current->pid);
@ -246,10 +247,9 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm)
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;
@ -277,8 +277,9 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm)
*/
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;

18
fs/binfmt_flat.c
View File

@ -176,19 +176,14 @@ static int create_flat_tables(struct linux_binprm *bprm, unsigned long arg_start
#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);
@ -204,13 +199,11 @@ static int decompress_exec(
}
/* 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;
@ -276,7 +269,7 @@ static int decompress_exec(
}
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;
@ -284,7 +277,6 @@ static int decompress_exec(
strm.next_in = buf;
strm.avail_in = ret;
strm.total_in = 0;
fpos += ret;
}
if (ret < 0) {

5
fs/binfmt_misc.c
View File

@ -218,12 +218,15 @@ static int load_misc_binary(struct linux_binprm *bprm)
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);

5
fs/coda/dir.c
View File

@ -368,9 +368,10 @@ static int coda_venus_readdir(struct file *coda_file, struct dir_context *ctx)
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);

2
fs/ecryptfs/read_write.c
View File

@ -237,7 +237,7 @@ int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
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);
}
/**

7
fs/exec.c
View File

@ -922,8 +922,7 @@ int kernel_read_file(struct file *file, void **buf, loff_t *size,
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;
@ -931,7 +930,6 @@ int kernel_read_file(struct file *file, void **buf, loff_t *size,
if (bytes == 0)
break;
pos += bytes;
}
if (pos != i_size) {
@ -1524,6 +1522,7 @@ static void bprm_fill_uid(struct linux_binprm *bprm)
int prepare_binprm(struct linux_binprm *bprm)
{
int retval;
loff_t pos = 0;
bprm_fill_uid(bprm);
@ -1534,7 +1533,7 @@ int prepare_binprm(struct linux_binprm *bprm)
bprm->cred_prepared = 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);

8
fs/read_write.c
View File

@ -415,17 +415,15 @@ ssize_t __vfs_read(struct file *file, char __user *buf, size_t count,
}
EXPORT_SYMBOL(__vfs_read);
int kernel_read(struct file *file, loff_t offset, char *addr,
unsigned long count)
ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
{
mm_segment_t old_fs;
loff_t pos = offset;
int result;
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 *)addr, count, &pos);
result = vfs_read(file, (void __user *)buf, count, pos);
set_fs(old_fs);
return result;
}

2
include/linux/fs.h
View File

@ -2772,13 +2772,13 @@ static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id)
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_read(struct file *, void *, size_t, loff_t *);
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 struct file * open_exec(const char *);

12
kernel/sysctl_binary.c
View File

@ -986,8 +986,9 @@ static ssize_t bin_intvec(struct file *file,
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;
@ -1057,8 +1058,9 @@ static ssize_t bin_ulongvec(struct file *file,
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;
@ -1120,8 +1122,9 @@ static ssize_t bin_uuid(struct file *file,
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;
@ -1154,8 +1157,9 @@ static ssize_t bin_dn_node_address(struct file *file,
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;

4
net/9p/trans_fd.c
View File

@ -272,6 +272,7 @@ static int p9_fd_read(struct p9_client *client, void *v, int len)
{
int ret;
struct p9_trans_fd *ts = NULL;
loff_t pos;
if (client && client->status != Disconnected)
ts = client->trans;
@ -282,7 +283,8 @@ static int p9_fd_read(struct p9_client *client, void *v, int len)
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;

3
security/keys/big_key.c
View File

@ -295,6 +295,7 @@ long big_key_read(const struct key *key, char __user *buffer, size_t buflen)
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)
@ -307,7 +308,7 @@ long big_key_read(const struct key *key, char __user *buffer, size_t buflen)
}
/* 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;