summaryrefslogtreecommitdiff
path: root/fs/open.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/open.c')
-rw-r--r--fs/open.c165
1 files changed, 76 insertions, 89 deletions
diff --git a/fs/open.c b/fs/open.c
index 9b33c0cbfacf..fca72c4d3f17 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -30,6 +30,7 @@
#include <linux/fs_struct.h>
#include <linux/ima.h>
#include <linux/dnotify.h>
+#include <linux/compat.h>
#include "internal.h"
@@ -140,6 +141,13 @@ SYSCALL_DEFINE2(truncate, const char __user *, path, long, length)
return do_sys_truncate(path, length);
}
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE2(truncate, const char __user *, path, compat_off_t, length)
+{
+ return do_sys_truncate(path, length);
+}
+#endif
+
static long do_sys_ftruncate(unsigned int fd, loff_t length, int small)
{
struct inode *inode;
@@ -189,46 +197,33 @@ out:
SYSCALL_DEFINE2(ftruncate, unsigned int, fd, unsigned long, length)
{
- long ret = do_sys_ftruncate(fd, length, 1);
- /* avoid REGPARM breakage on x86: */
- asmlinkage_protect(2, ret, fd, length);
- return ret;
+ return do_sys_ftruncate(fd, length, 1);
}
-/* LFS versions of truncate are only needed on 32 bit machines */
-#if BITS_PER_LONG == 32
-SYSCALL_DEFINE(truncate64)(const char __user * path, loff_t length)
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE2(ftruncate, unsigned int, fd, compat_ulong_t, length)
{
- return do_sys_truncate(path, length);
+ return do_sys_ftruncate(fd, length, 1);
}
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-asmlinkage long SyS_truncate64(long path, loff_t length)
-{
- return SYSC_truncate64((const char __user *) path, length);
-}
-SYSCALL_ALIAS(sys_truncate64, SyS_truncate64);
#endif
-SYSCALL_DEFINE(ftruncate64)(unsigned int fd, loff_t length)
+/* LFS versions of truncate are only needed on 32 bit machines */
+#if BITS_PER_LONG == 32
+SYSCALL_DEFINE2(truncate64, const char __user *, path, loff_t, length)
{
- long ret = do_sys_ftruncate(fd, length, 0);
- /* avoid REGPARM breakage on x86: */
- asmlinkage_protect(2, ret, fd, length);
- return ret;
+ return do_sys_truncate(path, length);
}
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-asmlinkage long SyS_ftruncate64(long fd, loff_t length)
+
+SYSCALL_DEFINE2(ftruncate64, unsigned int, fd, loff_t, length)
{
- return SYSC_ftruncate64((unsigned int) fd, length);
+ return do_sys_ftruncate(fd, length, 0);
}
-SYSCALL_ALIAS(sys_ftruncate64, SyS_ftruncate64);
-#endif
#endif /* BITS_PER_LONG == 32 */
int do_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 (offset < 0 || len <= 0)
@@ -284,7 +279,7 @@ int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
return ret;
}
-SYSCALL_DEFINE(fallocate)(int fd, int mode, loff_t offset, loff_t len)
+SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
{
struct fd f = fdget(fd);
int error = -EBADF;
@@ -296,14 +291,6 @@ SYSCALL_DEFINE(fallocate)(int fd, int mode, loff_t offset, loff_t len)
return error;
}
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-asmlinkage long SyS_fallocate(long fd, long mode, loff_t offset, loff_t len)
-{
- return SYSC_fallocate((int)fd, (int)mode, offset, len);
-}
-SYSCALL_ALIAS(sys_fallocate, SyS_fallocate);
-#endif
-
/*
* access() needs to use the real uid/gid, not the effective uid/gid.
* We do this by temporarily clearing all FS-related capabilities and
@@ -426,7 +413,7 @@ SYSCALL_DEFINE1(fchdir, unsigned int, fd)
if (!f.file)
goto out;
- inode = f.file->f_path.dentry->d_inode;
+ inode = file_inode(f.file);
error = -ENOTDIR;
if (!S_ISDIR(inode->i_mode))
@@ -689,7 +676,7 @@ static int do_dentry_open(struct file *f,
f->f_mode = FMODE_PATH;
path_get(&f->f_path);
- inode = f->f_path.dentry->d_inode;
+ inode = f->f_inode = f->f_path.dentry->d_inode;
if (f->f_mode & FMODE_WRITE) {
error = __get_file_write_access(inode, f->f_path.mnt);
if (error)
@@ -699,7 +686,6 @@ static int do_dentry_open(struct file *f,
}
f->f_mapping = inode->i_mapping;
- f->f_pos = 0;
file_sb_list_add(f, inode->i_sb);
if (unlikely(f->f_mode & FMODE_PATH)) {
@@ -753,6 +739,7 @@ cleanup_file:
path_put(&f->f_path);
f->f_path.mnt = NULL;
f->f_path.dentry = NULL;
+ f->f_inode = NULL;
return error;
}
@@ -810,23 +797,22 @@ struct file *dentry_open(const struct path *path, int flags,
/* We must always pass in a valid mount pointer. */
BUG_ON(!path->mnt);
- error = -ENFILE;
f = get_empty_filp();
- if (f == NULL)
- return ERR_PTR(error);
-
- f->f_flags = flags;
- f->f_path = *path;
- error = do_dentry_open(f, NULL, cred);
- if (!error) {
- error = open_check_o_direct(f);
- if (error) {
- fput(f);
+ if (!IS_ERR(f)) {
+ f->f_flags = flags;
+ f->f_path = *path;
+ error = do_dentry_open(f, NULL, cred);
+ if (!error) {
+ /* from now on we need fput() to dispose of f */
+ error = open_check_o_direct(f);
+ if (error) {
+ fput(f);
+ f = ERR_PTR(error);
+ }
+ } else {
+ put_filp(f);
f = ERR_PTR(error);
}
- } else {
- put_filp(f);
- f = ERR_PTR(error);
}
return f;
}
@@ -854,11 +840,15 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
if (flags & __O_SYNC)
flags |= O_DSYNC;
- /*
- * If we have O_PATH in the open flag. Then we
- * cannot have anything other than the below set of flags
- */
- if (flags & O_PATH) {
+ if (flags & O_TMPFILE) {
+ if (!(flags & O_CREAT))
+ return -EINVAL;
+ acc_mode = MAY_OPEN | ACC_MODE(flags);
+ } else if (flags & O_PATH) {
+ /*
+ * If we have O_PATH in the open flag. Then we
+ * cannot have anything other than the below set of flags
+ */
flags &= O_DIRECTORY | O_NOFOLLOW | O_PATH;
acc_mode = 0;
} else {
@@ -890,7 +880,8 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
lookup_flags |= LOOKUP_DIRECTORY;
if (!(flags & O_NOFOLLOW))
lookup_flags |= LOOKUP_FOLLOW;
- return lookup_flags;
+ op->lookup_flags = lookup_flags;
+ return 0;
}
/**
@@ -907,8 +898,8 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
struct file *file_open_name(struct filename *name, int flags, umode_t mode)
{
struct open_flags op;
- int lookup = build_open_flags(flags, mode, &op);
- return do_filp_open(AT_FDCWD, name, &op, lookup);
+ int err = build_open_flags(flags, mode, &op);
+ return err ? ERR_PTR(err) : do_filp_open(AT_FDCWD, name, &op);
}
/**
@@ -933,65 +924,61 @@ struct file *file_open_root(struct dentry *dentry, struct vfsmount *mnt,
const char *filename, int flags)
{
struct open_flags op;
- int lookup = build_open_flags(flags, 0, &op);
+ int err = build_open_flags(flags, 0, &op);
+ if (err)
+ return ERR_PTR(err);
if (flags & O_CREAT)
return ERR_PTR(-EINVAL);
if (!filename && (flags & O_DIRECTORY))
if (!dentry->d_inode->i_op->lookup)
return ERR_PTR(-ENOTDIR);
- return do_file_open_root(dentry, mnt, filename, &op, lookup);
+ return do_file_open_root(dentry, mnt, filename, &op);
}
EXPORT_SYMBOL(file_open_root);
long do_sys_open(int dfd, const char __user *filename, int flags, umode_t mode)
{
struct open_flags op;
- int lookup = build_open_flags(flags, mode, &op);
- struct filename *tmp = getname(filename);
- int fd = PTR_ERR(tmp);
-
- if (!IS_ERR(tmp)) {
- fd = get_unused_fd_flags(flags);
- if (fd >= 0) {
- struct file *f = do_filp_open(dfd, tmp, &op, lookup);
- if (IS_ERR(f)) {
- put_unused_fd(fd);
- fd = PTR_ERR(f);
- } else {
- fsnotify_open(f);
- fd_install(fd, f);
- }
+ int fd = build_open_flags(flags, mode, &op);
+ struct filename *tmp;
+
+ if (fd)
+ return fd;
+
+ tmp = getname(filename);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+
+ fd = get_unused_fd_flags(flags);
+ if (fd >= 0) {
+ struct file *f = do_filp_open(dfd, tmp, &op);
+ if (IS_ERR(f)) {
+ put_unused_fd(fd);
+ fd = PTR_ERR(f);
+ } else {
+ fsnotify_open(f);
+ fd_install(fd, f);
}
- putname(tmp);
}
+ putname(tmp);
return fd;
}
SYSCALL_DEFINE3(open, const char __user *, filename, int, flags, umode_t, mode)
{
- long ret;
-
if (force_o_largefile())
flags |= O_LARGEFILE;
- ret = do_sys_open(AT_FDCWD, filename, flags, mode);
- /* avoid REGPARM breakage on x86: */
- asmlinkage_protect(3, ret, filename, flags, mode);
- return ret;
+ return do_sys_open(AT_FDCWD, filename, flags, mode);
}
SYSCALL_DEFINE4(openat, int, dfd, const char __user *, filename, int, flags,
umode_t, mode)
{
- long ret;
-
if (force_o_largefile())
flags |= O_LARGEFILE;
- ret = do_sys_open(dfd, filename, flags, mode);
- /* avoid REGPARM breakage on x86: */
- asmlinkage_protect(4, ret, dfd, filename, flags, mode);
- return ret;
+ return do_sys_open(dfd, filename, flags, mode);
}
#ifndef __alpha__
generated by cgit v1.2.3 (git 2.39.0) at 2025-12-12 12:59:33 +0300