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-rw-r--r--fs/nilfs2/ioctl.c115
1 files changed, 103 insertions, 12 deletions
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index 496738963fd..f2469ba6246 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -26,7 +26,9 @@
#include <linux/capability.h> /* capable() */
#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
#include <linux/vmalloc.h>
+#include <linux/compat.h> /* compat_ptr() */
#include <linux/mount.h> /* mnt_want_write(), mnt_drop_write() */
+#include <linux/buffer_head.h>
#include <linux/nilfs2_fs.h>
#include "nilfs.h"
#include "segment.h"
@@ -97,11 +99,74 @@ static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
return ret;
}
+static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
+{
+ unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
+
+ return put_user(flags, (int __user *)argp);
+}
+
+static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
+ void __user *argp)
+{
+ struct nilfs_transaction_info ti;
+ unsigned int flags, oldflags;
+ int ret;
+
+ if (!inode_owner_or_capable(inode))
+ return -EACCES;
+
+ if (get_user(flags, (int __user *)argp))
+ return -EFAULT;
+
+ ret = mnt_want_write(filp->f_path.mnt);
+ if (ret)
+ return ret;
+
+ flags = nilfs_mask_flags(inode->i_mode, flags);
+
+ mutex_lock(&inode->i_mutex);
+
+ oldflags = NILFS_I(inode)->i_flags;
+
+ /*
+ * The IMMUTABLE and APPEND_ONLY flags can only be changed by the
+ * relevant capability.
+ */
+ ret = -EPERM;
+ if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) &&
+ !capable(CAP_LINUX_IMMUTABLE))
+ goto out;
+
+ ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
+ if (ret)
+ goto out;
+
+ NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
+ (flags & FS_FL_USER_MODIFIABLE);
+
+ nilfs_set_inode_flags(inode);
+ inode->i_ctime = CURRENT_TIME;
+ if (IS_SYNC(inode))
+ nilfs_set_transaction_flag(NILFS_TI_SYNC);
+
+ nilfs_mark_inode_dirty(inode);
+ ret = nilfs_transaction_commit(inode->i_sb);
+out:
+ mutex_unlock(&inode->i_mutex);
+ mnt_drop_write(filp->f_path.mnt);
+ return ret;
+}
+
+static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
+{
+ return put_user(inode->i_generation, (int __user *)argp);
+}
+
static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
unsigned int cmd, void __user *argp)
{
- struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
- struct inode *cpfile = nilfs->ns_cpfile;
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
struct nilfs_transaction_info ti;
struct nilfs_cpmode cpmode;
int ret;
@@ -121,7 +186,7 @@ static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
nilfs_transaction_begin(inode->i_sb, &ti, 0);
ret = nilfs_cpfile_change_cpmode(
- cpfile, cpmode.cm_cno, cpmode.cm_mode);
+ nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
if (unlikely(ret < 0))
nilfs_transaction_abort(inode->i_sb);
else
@@ -137,7 +202,7 @@ static int
nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
unsigned int cmd, void __user *argp)
{
- struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
struct nilfs_transaction_info ti;
__u64 cno;
int ret;
@@ -154,7 +219,7 @@ nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
goto out;
nilfs_transaction_begin(inode->i_sb, &ti, 0);
- ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
+ ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
if (unlikely(ret < 0))
nilfs_transaction_abort(inode->i_sb);
else
@@ -180,7 +245,7 @@ nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
unsigned int cmd, void __user *argp)
{
- struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
struct nilfs_cpstat cpstat;
int ret;
@@ -211,7 +276,7 @@ nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
unsigned int cmd, void __user *argp)
{
- struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
struct nilfs_sustat sustat;
int ret;
@@ -267,7 +332,7 @@ nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
unsigned int cmd, void __user *argp)
{
- struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
struct nilfs_argv argv;
int ret;
@@ -336,7 +401,7 @@ static int nilfs_ioctl_move_blocks(struct super_block *sb,
struct nilfs_argv *argv, void *buf)
{
size_t nmembs = argv->v_nmembs;
- struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
+ struct the_nilfs *nilfs = sb->s_fs_info;
struct inode *inode;
struct nilfs_vdesc *vdesc;
struct buffer_head *bh, *n;
@@ -550,7 +615,7 @@ static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
ret = PTR_ERR(kbufs[4]);
goto out;
}
- nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
+ nilfs = inode->i_sb->s_fs_info;
for (n = 0; n < 4; n++) {
ret = -EINVAL;
@@ -623,7 +688,7 @@ static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
return ret;
if (argp != NULL) {
- nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
+ nilfs = inode->i_sb->s_fs_info;
down_read(&nilfs->ns_segctor_sem);
cno = nilfs->ns_cno - 1;
up_read(&nilfs->ns_segctor_sem);
@@ -641,7 +706,7 @@ static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
void *, size_t, size_t))
{
- struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
struct nilfs_argv argv;
int ret;
@@ -666,6 +731,12 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
void __user *argp = (void __user *)arg;
switch (cmd) {
+ case FS_IOC_GETFLAGS:
+ return nilfs_ioctl_getflags(inode, argp);
+ case FS_IOC_SETFLAGS:
+ return nilfs_ioctl_setflags(inode, filp, argp);
+ case FS_IOC_GETVERSION:
+ return nilfs_ioctl_getversion(inode, argp);
case NILFS_IOCTL_CHANGE_CPMODE:
return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
case NILFS_IOCTL_DELETE_CHECKPOINT:
@@ -696,3 +767,23 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return -ENOTTY;
}
}
+
+#ifdef CONFIG_COMPAT
+long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case FS_IOC32_GETFLAGS:
+ cmd = FS_IOC_GETFLAGS;
+ break;
+ case FS_IOC32_SETFLAGS:
+ cmd = FS_IOC_SETFLAGS;
+ break;
+ case FS_IOC32_GETVERSION:
+ cmd = FS_IOC_GETVERSION;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-29 00:26:08 +0000