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Diffstat (limited to 'fs/ioctl.c')
-rw-r--r--fs/ioctl.c121
1 files changed, 38 insertions, 83 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c
index e92fdbb3bc3..8ac3fad3619 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -6,12 +6,11 @@
#include <linux/syscalls.h>
#include <linux/mm.h>
-#include <linux/smp_lock.h>
#include <linux/capability.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/security.h>
-#include <linux/module.h>
+#include <linux/export.h>
#include <linux/uaccess.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
@@ -38,12 +37,12 @@ static long vfs_ioctl(struct file *filp, unsigned int cmd,
{
int error = -ENOTTY;
- if (!filp->f_op || !filp->f_op->unlocked_ioctl)
+ if (!filp->f_op->unlocked_ioctl)
goto out;
error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
if (error == -ENOIOCTLCMD)
- error = -EINVAL;
+ error = -ENOTTY;
out:
return error;
}
@@ -87,7 +86,7 @@ int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
u64 phys, u64 len, u32 flags)
{
struct fiemap_extent extent;
- struct fiemap_extent *dest = fieinfo->fi_extents_start;
+ struct fiemap_extent __user *dest = fieinfo->fi_extents_start;
/* only count the extents */
if (fieinfo->fi_extents_max == 0) {
@@ -174,8 +173,9 @@ static int fiemap_check_ranges(struct super_block *sb,
static int ioctl_fiemap(struct file *filp, unsigned long arg)
{
struct fiemap fiemap;
+ struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
struct fiemap_extent_info fieinfo = { 0, };
- struct inode *inode = filp->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(filp);
struct super_block *sb = inode->i_sb;
u64 len;
int error;
@@ -183,8 +183,7 @@ static int ioctl_fiemap(struct file *filp, unsigned long arg)
if (!inode->i_op->fiemap)
return -EOPNOTSUPP;
- if (copy_from_user(&fiemap, (struct fiemap __user *)arg,
- sizeof(struct fiemap)))
+ if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
return -EFAULT;
if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
@@ -197,7 +196,7 @@ static int ioctl_fiemap(struct file *filp, unsigned long arg)
fieinfo.fi_flags = fiemap.fm_flags;
fieinfo.fi_extents_max = fiemap.fm_extent_count;
- fieinfo.fi_extents_start = (struct fiemap_extent *)(arg + sizeof(fiemap));
+ fieinfo.fi_extents_start = ufiemap->fm_extents;
if (fiemap.fm_extent_count != 0 &&
!access_ok(VERIFY_WRITE, fieinfo.fi_extents_start,
@@ -210,7 +209,7 @@ static int ioctl_fiemap(struct file *filp, unsigned long arg)
error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start, len);
fiemap.fm_flags = fieinfo.fi_flags;
fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
- if (copy_to_user((char *)arg, &fiemap, sizeof(fiemap)))
+ if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
error = -EFAULT;
return error;
@@ -274,6 +273,13 @@ int __generic_block_fiemap(struct inode *inode,
len = isize;
}
+ /*
+ * Some filesystems can't deal with being asked to map less than
+ * blocksize, so make sure our len is at least block length.
+ */
+ if (logical_to_blk(inode, len) == 0)
+ len = blk_to_logical(inode, 1);
+
start_blk = logical_to_blk(inode, start);
last_blk = logical_to_blk(inode, start + len - 1);
@@ -418,7 +424,7 @@ EXPORT_SYMBOL(generic_block_fiemap);
*/
int ioctl_preallocate(struct file *filp, void __user *argp)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(filp);
struct space_resv sr;
if (copy_from_user(&sr, argp, sizeof(sr)))
@@ -443,7 +449,7 @@ int ioctl_preallocate(struct file *filp, void __user *argp)
static int file_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(filp);
int __user *p = (int __user *)arg;
switch (cmd) {
@@ -495,7 +501,7 @@ static int ioctl_fioasync(unsigned int fd, struct file *filp,
/* Did FASYNC state change ? */
if ((flag ^ filp->f_flags) & FASYNC) {
- if (filp->f_op && filp->f_op->fasync)
+ if (filp->f_op->fasync)
/* fasync() adjusts filp->f_flags */
error = filp->f_op->fasync(fd, filp, on);
else
@@ -506,7 +512,7 @@ static int ioctl_fioasync(unsigned int fd, struct file *filp,
static int ioctl_fsfreeze(struct file *filp)
{
- struct super_block *sb = filp->f_path.dentry->d_inode->i_sb;
+ struct super_block *sb = file_inode(filp)->i_sb;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -521,7 +527,7 @@ static int ioctl_fsfreeze(struct file *filp)
static int ioctl_fsthaw(struct file *filp)
{
- struct super_block *sb = filp->f_path.dentry->d_inode->i_sb;
+ struct super_block *sb = file_inode(filp)->i_sb;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -530,41 +536,6 @@ static int ioctl_fsthaw(struct file *filp)
return thaw_super(sb);
}
-static int ioctl_fstrim(struct file *filp, void __user *argp)
-{
- struct super_block *sb = filp->f_path.dentry->d_inode->i_sb;
- struct fstrim_range range;
- int ret = 0;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- /* If filesystem doesn't support trim feature, return. */
- if (sb->s_op->trim_fs == NULL)
- return -EOPNOTSUPP;
-
- /* If a blockdevice-backed filesystem isn't specified, return EINVAL. */
- if (sb->s_bdev == NULL)
- return -EINVAL;
-
- if (argp == NULL) {
- range.start = 0;
- range.len = ULLONG_MAX;
- range.minlen = 0;
- } else if (copy_from_user(&range, argp, sizeof(range)))
- return -EFAULT;
-
- ret = sb->s_op->trim_fs(sb, &range);
- if (ret < 0)
- return ret;
-
- if ((argp != NULL) &&
- (copy_to_user(argp, &range, sizeof(range))))
- return -EFAULT;
-
- return 0;
-}
-
/*
* When you add any new common ioctls to the switches above and below
* please update compat_sys_ioctl() too.
@@ -577,6 +548,7 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
{
int error = 0;
int __user *argp = (int __user *)arg;
+ struct inode *inode = file_inode(filp);
switch (cmd) {
case FIOCLEX:
@@ -596,13 +568,11 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
break;
case FIOQSIZE:
- if (S_ISDIR(filp->f_path.dentry->d_inode->i_mode) ||
- S_ISREG(filp->f_path.dentry->d_inode->i_mode) ||
- S_ISLNK(filp->f_path.dentry->d_inode->i_mode)) {
- loff_t res =
- inode_get_bytes(filp->f_path.dentry->d_inode);
- error = copy_to_user((loff_t __user *)arg, &res,
- sizeof(res)) ? -EFAULT : 0;
+ if (S_ISDIR(inode->i_mode) || S_ISREG(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)) {
+ loff_t res = inode_get_bytes(inode);
+ error = copy_to_user(argp, &res, sizeof(res)) ?
+ -EFAULT : 0;
} else
error = -ENOTTY;
break;
@@ -615,22 +585,14 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
error = ioctl_fsthaw(filp);
break;
- case FITRIM:
- error = ioctl_fstrim(filp, argp);
- break;
-
case FS_IOC_FIEMAP:
return ioctl_fiemap(filp, arg);
case FIGETBSZ:
- {
- struct inode *inode = filp->f_path.dentry->d_inode;
- int __user *p = (int __user *)arg;
- return put_user(inode->i_sb->s_blocksize, p);
- }
+ return put_user(inode->i_sb->s_blocksize, argp);
default:
- if (S_ISREG(filp->f_path.dentry->d_inode->i_mode))
+ if (S_ISREG(inode->i_mode))
error = file_ioctl(filp, cmd, arg);
else
error = vfs_ioctl(filp, cmd, arg);
@@ -641,21 +603,14 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
{
- struct file *filp;
- int error = -EBADF;
- int fput_needed;
-
- filp = fget_light(fd, &fput_needed);
- if (!filp)
- goto out;
-
- error = security_file_ioctl(filp, cmd, arg);
- if (error)
- goto out_fput;
-
- error = do_vfs_ioctl(filp, fd, cmd, arg);
- out_fput:
- fput_light(filp, fput_needed);
- out:
+ int error;
+ struct fd f = fdget(fd);
+
+ if (!f.file)
+ return -EBADF;
+ error = security_file_ioctl(f.file, cmd, arg);
+ if (!error)
+ error = do_vfs_ioctl(f.file, fd, cmd, arg);
+ fdput(f);
return error;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 00:26:11 +0000