[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/nilfs2/ioctl.c b/ap/os/linux/linux-3.4.x/fs/nilfs2/ioctl.c
new file mode 100644
index 0000000..3729493
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/nilfs2/ioctl.c
@@ -0,0 +1,871 @@
+/*
+ * ioctl.c - NILFS ioctl operations.
+ *
+ * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Written by Koji Sato <koji@osrg.net>.
+ */
+
+#include <linux/fs.h>
+#include <linux/wait.h>
+#include <linux/slab.h>
+#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_file(), mnt_drop_write_file() */
+#include <linux/buffer_head.h>
+#include <linux/nilfs2_fs.h>
+#include "nilfs.h"
+#include "segment.h"
+#include "bmap.h"
+#include "cpfile.h"
+#include "sufile.h"
+#include "dat.h"
+
+
+static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
+ struct nilfs_argv *argv, int dir,
+ ssize_t (*dofunc)(struct the_nilfs *,
+ __u64 *, int,
+ void *, size_t, size_t))
+{
+ void *buf;
+ void __user *base = (void __user *)(unsigned long)argv->v_base;
+ size_t maxmembs, total, n;
+ ssize_t nr;
+ int ret, i;
+ __u64 pos, ppos;
+
+ if (argv->v_nmembs == 0)
+ return 0;
+
+ if (argv->v_size > PAGE_SIZE)
+ return -EINVAL;
+
+ buf = (void *)__get_free_pages(GFP_NOFS, 0);
+ if (unlikely(!buf))
+ return -ENOMEM;
+ maxmembs = PAGE_SIZE / argv->v_size;
+
+ ret = 0;
+ total = 0;
+ pos = argv->v_index;
+ for (i = 0; i < argv->v_nmembs; i += n) {
+ n = (argv->v_nmembs - i < maxmembs) ?
+ argv->v_nmembs - i : maxmembs;
+ if ((dir & _IOC_WRITE) &&
+ copy_from_user(buf, base + argv->v_size * i,
+ argv->v_size * n)) {
+ ret = -EFAULT;
+ break;
+ }
+ ppos = pos;
+ nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
+ n);
+ if (nr < 0) {
+ ret = nr;
+ break;
+ }
+ if ((dir & _IOC_READ) &&
+ copy_to_user(base + argv->v_size * i, buf,
+ argv->v_size * nr)) {
+ ret = -EFAULT;
+ break;
+ }
+ total += nr;
+ if ((size_t)nr < n)
+ break;
+ if (pos == ppos)
+ pos += n;
+ }
+ argv->v_nmembs = total;
+
+ free_pages((unsigned long)buf, 0);
+ 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_file(filp);
+ 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_file(filp);
+ 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 = inode->i_sb->s_fs_info;
+ struct nilfs_transaction_info ti;
+ struct nilfs_cpmode cpmode;
+ int ret;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ ret = mnt_want_write_file(filp);
+ if (ret)
+ return ret;
+
+ ret = -EFAULT;
+ if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
+ goto out;
+
+ mutex_lock(&nilfs->ns_snapshot_mount_mutex);
+
+ nilfs_transaction_begin(inode->i_sb, &ti, 0);
+ ret = nilfs_cpfile_change_cpmode(
+ nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
+ if (unlikely(ret < 0))
+ nilfs_transaction_abort(inode->i_sb);
+ else
+ nilfs_transaction_commit(inode->i_sb); /* never fails */
+
+ mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
+out:
+ mnt_drop_write_file(filp);
+ return ret;
+}
+
+static int
+nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
+ unsigned int cmd, void __user *argp)
+{
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
+ struct nilfs_transaction_info ti;
+ __u64 cno;
+ int ret;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ ret = mnt_want_write_file(filp);
+ if (ret)
+ return ret;
+
+ ret = -EFAULT;
+ if (copy_from_user(&cno, argp, sizeof(cno)))
+ goto out;
+
+ nilfs_transaction_begin(inode->i_sb, &ti, 0);
+ ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
+ if (unlikely(ret < 0))
+ nilfs_transaction_abort(inode->i_sb);
+ else
+ nilfs_transaction_commit(inode->i_sb); /* never fails */
+out:
+ mnt_drop_write_file(filp);
+ return ret;
+}
+
+static ssize_t
+nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
+ void *buf, size_t size, size_t nmembs)
+{
+ int ret;
+
+ down_read(&nilfs->ns_segctor_sem);
+ ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
+ size, nmembs);
+ up_read(&nilfs->ns_segctor_sem);
+ return ret;
+}
+
+static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
+ unsigned int cmd, void __user *argp)
+{
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
+ struct nilfs_cpstat cpstat;
+ int ret;
+
+ down_read(&nilfs->ns_segctor_sem);
+ ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
+ up_read(&nilfs->ns_segctor_sem);
+ if (ret < 0)
+ return ret;
+
+ if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
+ ret = -EFAULT;
+ return ret;
+}
+
+static ssize_t
+nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
+ void *buf, size_t size, size_t nmembs)
+{
+ int ret;
+
+ down_read(&nilfs->ns_segctor_sem);
+ ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
+ nmembs);
+ up_read(&nilfs->ns_segctor_sem);
+ return ret;
+}
+
+static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
+ unsigned int cmd, void __user *argp)
+{
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
+ struct nilfs_sustat sustat;
+ int ret;
+
+ down_read(&nilfs->ns_segctor_sem);
+ ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
+ up_read(&nilfs->ns_segctor_sem);
+ if (ret < 0)
+ return ret;
+
+ if (copy_to_user(argp, &sustat, sizeof(sustat)))
+ ret = -EFAULT;
+ return ret;
+}
+
+static ssize_t
+nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
+ void *buf, size_t size, size_t nmembs)
+{
+ int ret;
+
+ down_read(&nilfs->ns_segctor_sem);
+ ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
+ up_read(&nilfs->ns_segctor_sem);
+ return ret;
+}
+
+static ssize_t
+nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
+ void *buf, size_t size, size_t nmembs)
+{
+ struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
+ struct nilfs_bdesc *bdescs = buf;
+ int ret, i;
+
+ down_read(&nilfs->ns_segctor_sem);
+ for (i = 0; i < nmembs; i++) {
+ ret = nilfs_bmap_lookup_at_level(bmap,
+ bdescs[i].bd_offset,
+ bdescs[i].bd_level + 1,
+ &bdescs[i].bd_blocknr);
+ if (ret < 0) {
+ if (ret != -ENOENT) {
+ up_read(&nilfs->ns_segctor_sem);
+ return ret;
+ }
+ bdescs[i].bd_blocknr = 0;
+ }
+ }
+ up_read(&nilfs->ns_segctor_sem);
+ return nmembs;
+}
+
+static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
+ unsigned int cmd, void __user *argp)
+{
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
+ struct nilfs_argv argv;
+ int ret;
+
+ if (copy_from_user(&argv, argp, sizeof(argv)))
+ return -EFAULT;
+
+ if (argv.v_size != sizeof(struct nilfs_bdesc))
+ return -EINVAL;
+
+ ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
+ nilfs_ioctl_do_get_bdescs);
+ if (ret < 0)
+ return ret;
+
+ if (copy_to_user(argp, &argv, sizeof(argv)))
+ ret = -EFAULT;
+ return ret;
+}
+
+static int nilfs_ioctl_move_inode_block(struct inode *inode,
+ struct nilfs_vdesc *vdesc,
+ struct list_head *buffers)
+{
+ struct buffer_head *bh;
+ int ret;
+
+ if (vdesc->vd_flags == 0)
+ ret = nilfs_gccache_submit_read_data(
+ inode, vdesc->vd_offset, vdesc->vd_blocknr,
+ vdesc->vd_vblocknr, &bh);
+ else
+ ret = nilfs_gccache_submit_read_node(
+ inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
+
+ if (unlikely(ret < 0)) {
+ if (ret == -ENOENT)
+ printk(KERN_CRIT
+ "%s: invalid virtual block address (%s): "
+ "ino=%llu, cno=%llu, offset=%llu, "
+ "blocknr=%llu, vblocknr=%llu\n",
+ __func__, vdesc->vd_flags ? "node" : "data",
+ (unsigned long long)vdesc->vd_ino,
+ (unsigned long long)vdesc->vd_cno,
+ (unsigned long long)vdesc->vd_offset,
+ (unsigned long long)vdesc->vd_blocknr,
+ (unsigned long long)vdesc->vd_vblocknr);
+ return ret;
+ }
+ if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
+ printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, "
+ "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n",
+ __func__, vdesc->vd_flags ? "node" : "data",
+ (unsigned long long)vdesc->vd_ino,
+ (unsigned long long)vdesc->vd_cno,
+ (unsigned long long)vdesc->vd_offset,
+ (unsigned long long)vdesc->vd_blocknr,
+ (unsigned long long)vdesc->vd_vblocknr);
+ brelse(bh);
+ return -EEXIST;
+ }
+ list_add_tail(&bh->b_assoc_buffers, buffers);
+ return 0;
+}
+
+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 = sb->s_fs_info;
+ struct inode *inode;
+ struct nilfs_vdesc *vdesc;
+ struct buffer_head *bh, *n;
+ LIST_HEAD(buffers);
+ ino_t ino;
+ __u64 cno;
+ int i, ret;
+
+ for (i = 0, vdesc = buf; i < nmembs; ) {
+ ino = vdesc->vd_ino;
+ cno = vdesc->vd_cno;
+ inode = nilfs_iget_for_gc(sb, ino, cno);
+ if (IS_ERR(inode)) {
+ ret = PTR_ERR(inode);
+ goto failed;
+ }
+ if (list_empty(&NILFS_I(inode)->i_dirty)) {
+ /*
+ * Add the inode to GC inode list. Garbage Collection
+ * is serialized and no two processes manipulate the
+ * list simultaneously.
+ */
+ igrab(inode);
+ list_add(&NILFS_I(inode)->i_dirty,
+ &nilfs->ns_gc_inodes);
+ }
+
+ do {
+ ret = nilfs_ioctl_move_inode_block(inode, vdesc,
+ &buffers);
+ if (unlikely(ret < 0)) {
+ iput(inode);
+ goto failed;
+ }
+ vdesc++;
+ } while (++i < nmembs &&
+ vdesc->vd_ino == ino && vdesc->vd_cno == cno);
+
+ iput(inode); /* The inode still remains in GC inode list */
+ }
+
+ list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
+ ret = nilfs_gccache_wait_and_mark_dirty(bh);
+ if (unlikely(ret < 0)) {
+ WARN_ON(ret == -EEXIST);
+ goto failed;
+ }
+ list_del_init(&bh->b_assoc_buffers);
+ brelse(bh);
+ }
+ return nmembs;
+
+ failed:
+ list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
+ list_del_init(&bh->b_assoc_buffers);
+ brelse(bh);
+ }
+ return ret;
+}
+
+static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
+ struct nilfs_argv *argv, void *buf)
+{
+ size_t nmembs = argv->v_nmembs;
+ struct inode *cpfile = nilfs->ns_cpfile;
+ struct nilfs_period *periods = buf;
+ int ret, i;
+
+ for (i = 0; i < nmembs; i++) {
+ ret = nilfs_cpfile_delete_checkpoints(
+ cpfile, periods[i].p_start, periods[i].p_end);
+ if (ret < 0)
+ return ret;
+ }
+ return nmembs;
+}
+
+static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
+ struct nilfs_argv *argv, void *buf)
+{
+ size_t nmembs = argv->v_nmembs;
+ int ret;
+
+ ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
+
+ return (ret < 0) ? ret : nmembs;
+}
+
+static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
+ struct nilfs_argv *argv, void *buf)
+{
+ size_t nmembs = argv->v_nmembs;
+ struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
+ struct nilfs_bdesc *bdescs = buf;
+ int ret, i;
+
+ for (i = 0; i < nmembs; i++) {
+ /* XXX: use macro or inline func to check liveness */
+ ret = nilfs_bmap_lookup_at_level(bmap,
+ bdescs[i].bd_offset,
+ bdescs[i].bd_level + 1,
+ &bdescs[i].bd_blocknr);
+ if (ret < 0) {
+ if (ret != -ENOENT)
+ return ret;
+ bdescs[i].bd_blocknr = 0;
+ }
+ if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
+ /* skip dead block */
+ continue;
+ if (bdescs[i].bd_level == 0) {
+ ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat,
+ bdescs[i].bd_offset);
+ if (ret < 0) {
+ WARN_ON(ret == -ENOENT);
+ return ret;
+ }
+ } else {
+ ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
+ bdescs[i].bd_level);
+ if (ret < 0) {
+ WARN_ON(ret == -ENOENT);
+ return ret;
+ }
+ }
+ }
+ return nmembs;
+}
+
+int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
+ struct nilfs_argv *argv, void **kbufs)
+{
+ const char *msg;
+ int ret;
+
+ ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
+ if (ret < 0) {
+ /*
+ * can safely abort because checkpoints can be removed
+ * independently.
+ */
+ msg = "cannot delete checkpoints";
+ goto failed;
+ }
+ ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
+ if (ret < 0) {
+ /*
+ * can safely abort because DAT file is updated atomically
+ * using a copy-on-write technique.
+ */
+ msg = "cannot delete virtual blocks from DAT file";
+ goto failed;
+ }
+ ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
+ if (ret < 0) {
+ /*
+ * can safely abort because the operation is nondestructive.
+ */
+ msg = "cannot mark copying blocks dirty";
+ goto failed;
+ }
+ return 0;
+
+ failed:
+ printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n",
+ msg, ret);
+ return ret;
+}
+
+static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
+ unsigned int cmd, void __user *argp)
+{
+ struct nilfs_argv argv[5];
+ static const size_t argsz[5] = {
+ sizeof(struct nilfs_vdesc),
+ sizeof(struct nilfs_period),
+ sizeof(__u64),
+ sizeof(struct nilfs_bdesc),
+ sizeof(__u64),
+ };
+ void __user *base;
+ void *kbufs[5];
+ struct the_nilfs *nilfs;
+ size_t len, nsegs;
+ int n, ret;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ ret = mnt_want_write_file(filp);
+ if (ret)
+ return ret;
+
+ ret = -EFAULT;
+ if (copy_from_user(argv, argp, sizeof(argv)))
+ goto out;
+
+ ret = -EINVAL;
+ nsegs = argv[4].v_nmembs;
+ if (argv[4].v_size != argsz[4])
+ goto out;
+ if (nsegs > UINT_MAX / sizeof(__u64))
+ goto out;
+
+ /*
+ * argv[4] points to segment numbers this ioctl cleans. We
+ * use kmalloc() for its buffer because memory used for the
+ * segment numbers is enough small.
+ */
+ kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
+ nsegs * sizeof(__u64));
+ if (IS_ERR(kbufs[4])) {
+ ret = PTR_ERR(kbufs[4]);
+ goto out;
+ }
+ nilfs = inode->i_sb->s_fs_info;
+
+ for (n = 0; n < 4; n++) {
+ ret = -EINVAL;
+ if (argv[n].v_size != argsz[n])
+ goto out_free;
+
+ if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
+ goto out_free;
+
+ if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
+ goto out_free;
+
+ len = argv[n].v_size * argv[n].v_nmembs;
+ base = (void __user *)(unsigned long)argv[n].v_base;
+ if (len == 0) {
+ kbufs[n] = NULL;
+ continue;
+ }
+
+ kbufs[n] = vmalloc(len);
+ if (!kbufs[n]) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ if (copy_from_user(kbufs[n], base, len)) {
+ ret = -EFAULT;
+ vfree(kbufs[n]);
+ goto out_free;
+ }
+ }
+
+ /*
+ * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
+ * which will operates an inode list without blocking.
+ * To protect the list from concurrent operations,
+ * nilfs_ioctl_move_blocks should be atomic operation.
+ */
+ if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
+ ret = -EBUSY;
+ goto out_free;
+ }
+
+ vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
+
+ ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
+ if (ret < 0)
+ printk(KERN_ERR "NILFS: GC failed during preparation: "
+ "cannot read source blocks: err=%d\n", ret);
+ else {
+ if (nilfs_sb_need_update(nilfs))
+ set_nilfs_discontinued(nilfs);
+ ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
+ }
+
+ nilfs_remove_all_gcinodes(nilfs);
+ clear_nilfs_gc_running(nilfs);
+
+out_free:
+ while (--n >= 0)
+ vfree(kbufs[n]);
+ kfree(kbufs[4]);
+out:
+ mnt_drop_write_file(filp);
+ return ret;
+}
+
+static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
+ unsigned int cmd, void __user *argp)
+{
+ __u64 cno;
+ int ret;
+ struct the_nilfs *nilfs;
+
+ ret = nilfs_construct_segment(inode->i_sb);
+ if (ret < 0)
+ return ret;
+
+ if (argp != NULL) {
+ nilfs = inode->i_sb->s_fs_info;
+ down_read(&nilfs->ns_segctor_sem);
+ cno = nilfs->ns_cno - 1;
+ up_read(&nilfs->ns_segctor_sem);
+ if (copy_to_user(argp, &cno, sizeof(cno)))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
+ void __user *argp)
+{
+ __u64 newsize;
+ int ret = -EPERM;
+
+ if (!capable(CAP_SYS_ADMIN))
+ goto out;
+
+ ret = mnt_want_write_file(filp);
+ if (ret)
+ goto out;
+
+ ret = -EFAULT;
+ if (copy_from_user(&newsize, argp, sizeof(newsize)))
+ goto out_drop_write;
+
+ ret = nilfs_resize_fs(inode->i_sb, newsize);
+
+out_drop_write:
+ mnt_drop_write_file(filp);
+out:
+ return ret;
+}
+
+static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
+{
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
+ __u64 range[2];
+ __u64 minseg, maxseg;
+ unsigned long segbytes;
+ int ret = -EPERM;
+
+ if (!capable(CAP_SYS_ADMIN))
+ goto out;
+
+ ret = -EFAULT;
+ if (copy_from_user(range, argp, sizeof(__u64[2])))
+ goto out;
+
+ ret = -ERANGE;
+ if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode))
+ goto out;
+
+ segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
+
+ minseg = range[0] + segbytes - 1;
+ do_div(minseg, segbytes);
+ maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
+ do_div(maxseg, segbytes);
+ maxseg--;
+
+ ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
+out:
+ return ret;
+}
+
+static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
+ unsigned int cmd, void __user *argp,
+ size_t membsz,
+ ssize_t (*dofunc)(struct the_nilfs *,
+ __u64 *, int,
+ void *, size_t, size_t))
+
+{
+ struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
+ struct nilfs_argv argv;
+ int ret;
+
+ if (copy_from_user(&argv, argp, sizeof(argv)))
+ return -EFAULT;
+
+ if (argv.v_size < membsz)
+ return -EINVAL;
+
+ ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
+ if (ret < 0)
+ return ret;
+
+ if (copy_to_user(argp, &argv, sizeof(argv)))
+ ret = -EFAULT;
+ return ret;
+}
+
+long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ struct inode *inode = filp->f_dentry->d_inode;
+ 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:
+ return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
+ case NILFS_IOCTL_GET_CPINFO:
+ return nilfs_ioctl_get_info(inode, filp, cmd, argp,
+ sizeof(struct nilfs_cpinfo),
+ nilfs_ioctl_do_get_cpinfo);
+ case NILFS_IOCTL_GET_CPSTAT:
+ return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
+ case NILFS_IOCTL_GET_SUINFO:
+ return nilfs_ioctl_get_info(inode, filp, cmd, argp,
+ sizeof(struct nilfs_suinfo),
+ nilfs_ioctl_do_get_suinfo);
+ case NILFS_IOCTL_GET_SUSTAT:
+ return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
+ case NILFS_IOCTL_GET_VINFO:
+ return nilfs_ioctl_get_info(inode, filp, cmd, argp,
+ sizeof(struct nilfs_vinfo),
+ nilfs_ioctl_do_get_vinfo);
+ case NILFS_IOCTL_GET_BDESCS:
+ return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
+ case NILFS_IOCTL_CLEAN_SEGMENTS:
+ return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
+ case NILFS_IOCTL_SYNC:
+ return nilfs_ioctl_sync(inode, filp, cmd, argp);
+ case NILFS_IOCTL_RESIZE:
+ return nilfs_ioctl_resize(inode, filp, argp);
+ case NILFS_IOCTL_SET_ALLOC_RANGE:
+ return nilfs_ioctl_set_alloc_range(inode, argp);
+ default:
+ 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;
+ case NILFS_IOCTL_CHANGE_CPMODE:
+ case NILFS_IOCTL_DELETE_CHECKPOINT:
+ case NILFS_IOCTL_GET_CPINFO:
+ case NILFS_IOCTL_GET_CPSTAT:
+ case NILFS_IOCTL_GET_SUINFO:
+ case NILFS_IOCTL_GET_SUSTAT:
+ case NILFS_IOCTL_GET_VINFO:
+ case NILFS_IOCTL_GET_BDESCS:
+ case NILFS_IOCTL_CLEAN_SEGMENTS:
+ case NILFS_IOCTL_SYNC:
+ case NILFS_IOCTL_RESIZE:
+ case NILFS_IOCTL_SET_ALLOC_RANGE:
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif