#include <linux/smp_lock.h> /* lock_kernel(), unlock_kernel() */
#include <linux/capability.h> /* capable() */
#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
+#include <linux/vmalloc.h>
#include <linux/nilfs2_fs.h>
#include "nilfs.h"
#include "segment.h"
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;
n = (argv->v_nmembs - i < maxmembs) ?
argv->v_nmembs - i : maxmembs;
if ((dir & _IOC_WRITE) &&
- copy_from_user(buf,
- (void __user *)argv->v_base + argv->v_size * i,
- argv->v_size * n)) {
+ copy_from_user(buf, base + argv->v_size * i,
+ argv->v_size * n)) {
ret = -EFAULT;
break;
}
break;
}
if ((dir & _IOC_READ) &&
- copy_to_user(
- (void __user *)argv->v_base + argv->v_size * i,
- buf, argv->v_size * nr)) {
+ copy_to_user(base + argv->v_size * i, buf,
+ argv->v_size * nr)) {
ret = -EFAULT;
break;
}
static int nilfs_ioctl_change_cpmode(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 = NILFS_SB(inode->i_sb)->s_nilfs;
+ struct inode *cpfile = nilfs->ns_cpfile;
struct nilfs_transaction_info ti;
struct nilfs_cpmode cpmode;
int ret;
if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
return -EFAULT;
+ mutex_lock(&nilfs->ns_mount_mutex);
nilfs_transaction_begin(inode->i_sb, &ti, 0);
ret = nilfs_cpfile_change_cpmode(
cpfile, cpmode.cm_cno, cpmode.cm_mode);
if (unlikely(ret < 0)) {
nilfs_transaction_abort(inode->i_sb);
+ mutex_unlock(&nilfs->ns_mount_mutex);
return ret;
}
nilfs_transaction_commit(inode->i_sb); /* never fails */
+ mutex_unlock(&nilfs->ns_mount_mutex);
return ret;
}
nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
void *buf, size_t size, size_t nmembs)
{
- return nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
- nmembs);
-}
-
-static int nilfs_ioctl_get_cpinfo(struct inode *inode, struct file *filp,
- unsigned int cmd, void __user *argp)
-{
- struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
- struct nilfs_argv argv;
int ret;
- if (copy_from_user(&argv, argp, sizeof(argv)))
- return -EFAULT;
-
down_read(&nilfs->ns_segctor_sem);
- ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
- nilfs_ioctl_do_get_cpinfo);
+ ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
+ size, nmembs);
up_read(&nilfs->ns_segctor_sem);
- if (ret < 0)
- return ret;
-
- if (copy_to_user(argp, &argv, sizeof(argv)))
- ret = -EFAULT;
return ret;
}
nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
void *buf, size_t size, size_t nmembs)
{
- return nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, nmembs);
-}
-
-static int nilfs_ioctl_get_suinfo(struct inode *inode, struct file *filp,
- unsigned int cmd, void __user *argp)
-{
- struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
- struct nilfs_argv argv;
int ret;
- if (copy_from_user(&argv, argp, sizeof(argv)))
- return -EFAULT;
-
down_read(&nilfs->ns_segctor_sem);
- ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
- nilfs_ioctl_do_get_suinfo);
+ ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
+ nmembs);
up_read(&nilfs->ns_segctor_sem);
- if (ret < 0)
- return ret;
-
- if (copy_to_user(argp, &argv, sizeof(argv)))
- ret = -EFAULT;
return ret;
}
nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
void *buf, size_t size, size_t nmembs)
{
- return nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs);
-}
-
-static int nilfs_ioctl_get_vinfo(struct inode *inode, struct file *filp,
- unsigned int cmd, void __user *argp)
-{
- struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
- struct nilfs_argv argv;
int ret;
- if (copy_from_user(&argv, argp, sizeof(argv)))
- return -EFAULT;
-
down_read(&nilfs->ns_segctor_sem);
- ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
- nilfs_ioctl_do_get_vinfo);
+ ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, size, nmembs);
up_read(&nilfs->ns_segctor_sem);
- if (ret < 0)
- return ret;
-
- if (copy_to_user(argp, &argv, sizeof(argv)))
- ret = -EFAULT;
return ret;
}
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)
+ if (ret != -ENOENT) {
+ up_read(&nilfs->ns_segctor_sem);
return ret;
+ }
bdescs[i].bd_blocknr = 0;
}
}
+ up_read(&nilfs->ns_segctor_sem);
return nmembs;
}
if (copy_from_user(&argv, argp, sizeof(argv)))
return -EFAULT;
- down_read(&nilfs->ns_segctor_sem);
+ 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);
- up_read(&nilfs->ns_segctor_sem);
if (ret < 0)
return ret;
(unsigned long long)vdesc->vd_vblocknr);
return ret;
}
- bh->b_private = vdesc;
+ 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 ssize_t
-nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, __u64 *posp, int flags,
- void *buf, size_t size, size_t nmembs)
+static int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs,
+ struct nilfs_argv *argv, void *buf)
{
+ size_t nmembs = argv->v_nmembs;
struct inode *inode;
struct nilfs_vdesc *vdesc;
struct buffer_head *bh, *n;
list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
ret = nilfs_gccache_wait_and_mark_dirty(bh);
if (unlikely(ret < 0)) {
- if (ret == -EEXIST) {
- vdesc = bh->b_private;
- 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);
- }
+ WARN_ON(ret == -EEXIST);
goto failed;
}
list_del_init(&bh->b_assoc_buffers);
- bh->b_private = NULL;
brelse(bh);
}
return nmembs;
failed:
list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
list_del_init(&bh->b_assoc_buffers);
- bh->b_private = NULL;
brelse(bh);
}
return ret;
}
-static inline int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs,
- struct nilfs_argv *argv,
- int dir)
-{
- return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
- nilfs_ioctl_do_move_blocks);
-}
-
-static ssize_t
-nilfs_ioctl_do_delete_checkpoints(struct the_nilfs *nilfs, __u64 *posp,
- int flags, void *buf, size_t size,
- size_t nmembs)
+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;
return nmembs;
}
-static inline int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
- struct nilfs_argv *argv,
- int dir)
+static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
+ struct nilfs_argv *argv, void *buf)
{
- return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
- nilfs_ioctl_do_delete_checkpoints);
-}
+ size_t nmembs = argv->v_nmembs;
+ int ret;
-static ssize_t
-nilfs_ioctl_do_free_vblocknrs(struct the_nilfs *nilfs, __u64 *posp, int flags,
- void *buf, size_t size, size_t nmembs)
-{
- int ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
+ ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
return (ret < 0) ? ret : nmembs;
}
-static inline int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
- struct nilfs_argv *argv,
- int dir)
-{
- return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
- nilfs_ioctl_do_free_vblocknrs);
-}
-
-static ssize_t
-nilfs_ioctl_do_mark_blocks_dirty(struct the_nilfs *nilfs, __u64 *posp,
- int flags, void *buf, size_t size,
- size_t 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 inode *dat = nilfs_dat_inode(nilfs);
struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
struct nilfs_bdesc *bdescs = buf;
ret = nilfs_mdt_mark_block_dirty(dat,
bdescs[i].bd_offset);
if (ret < 0) {
- BUG_ON(ret == -ENOENT);
+ WARN_ON(ret == -ENOENT);
return ret;
}
} else {
ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
bdescs[i].bd_level);
if (ret < 0) {
- BUG_ON(ret == -ENOENT);
+ WARN_ON(ret == -ENOENT);
return ret;
}
}
return nmembs;
}
-static inline int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
- struct nilfs_argv *argv,
- int dir)
-{
- return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
- nilfs_ioctl_do_mark_blocks_dirty);
-}
-
-static ssize_t
-nilfs_ioctl_do_free_segments(struct the_nilfs *nilfs, __u64 *posp, int flags,
- void *buf, size_t size, size_t nmembs)
-{
- struct nilfs_sb_info *sbi = nilfs_get_writer(nilfs);
- int ret;
-
- BUG_ON(!sbi);
- ret = nilfs_segctor_add_segments_to_be_freed(
- NILFS_SC(sbi), buf, nmembs);
- nilfs_put_writer(nilfs);
-
- return (ret < 0) ? ret : nmembs;
-}
-
-static inline int nilfs_ioctl_free_segments(struct the_nilfs *nilfs,
- struct nilfs_argv *argv,
- int dir)
-{
- return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
- nilfs_ioctl_do_free_segments);
-}
-
int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
- void __user *argp)
+ struct nilfs_argv *argv, void **kbufs)
{
- struct nilfs_argv argv[5];
- int dir, ret;
-
- if (copy_from_user(argv, argp, sizeof(argv)))
- return -EFAULT;
-
- dir = _IOC_WRITE;
- ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], dir);
- if (ret < 0)
- goto out_move_blks;
- ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], dir);
- if (ret < 0)
- goto out_del_cps;
- ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], dir);
- if (ret < 0)
- goto out_free_vbns;
- ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], dir);
- if (ret < 0)
- goto out_free_vbns;
- ret = nilfs_ioctl_free_segments(nilfs, &argv[4], dir);
- if (ret < 0)
- goto out_free_segs;
+ 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;
- out_free_segs:
- BUG(); /* XXX: not implemented yet */
- out_free_vbns:
- BUG();/* XXX: not implemented yet */
- out_del_cps:
- BUG();/* XXX: not implemented yet */
- out_move_blks:
- nilfs_remove_all_gcinode(nilfs);
+ 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)
{
- int ret;
+ struct nilfs_argv argv[5];
+ const static 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 = nilfs_clean_segments(inode->i_sb, argp);
- clear_nilfs_cond_nongc_write(NILFS_SB(inode->i_sb)->s_nilfs);
- return ret;
-}
+ if (copy_from_user(argv, argp, sizeof(argv)))
+ return -EFAULT;
-static int nilfs_ioctl_test_cond(struct the_nilfs *nilfs, int cond)
-{
- return (cond & NILFS_TIMEDWAIT_SEG_WRITE) &&
- nilfs_cond_nongc_write(nilfs);
-}
+ nsegs = argv[4].v_nmembs;
+ if (argv[4].v_size != argsz[4])
+ return -EINVAL;
+ /*
+ * 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]))
+ return PTR_ERR(kbufs[4]);
+
+ nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
+
+ 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;
+
+ 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;
+ }
-static void nilfs_ioctl_clear_cond(struct the_nilfs *nilfs, int cond)
-{
- if (cond & NILFS_TIMEDWAIT_SEG_WRITE)
- clear_nilfs_cond_nongc_write(nilfs);
-}
+ 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;
+ }
+ }
-static int nilfs_ioctl_timedwait(struct inode *inode, struct file *filp,
- unsigned int cmd, void __user *argp)
-{
- struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
- struct nilfs_wait_cond wc;
- long ret;
+ /*
+ * nilfs_ioctl_move_blocks() will call nilfs_gc_iget(),
+ * 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;
+ }
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- if (copy_from_user(&wc, argp, sizeof(wc)))
- return -EFAULT;
+ ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], kbufs[0]);
+ if (ret < 0)
+ printk(KERN_ERR "NILFS: GC failed during preparation: "
+ "cannot read source blocks: err=%d\n", ret);
+ else
+ ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
- unlock_kernel();
- ret = wc.wc_flags ?
- wait_event_interruptible_timeout(
- nilfs->ns_cleanerd_wq,
- nilfs_ioctl_test_cond(nilfs, wc.wc_cond),
- timespec_to_jiffies(&wc.wc_timeout)) :
- wait_event_interruptible(
- nilfs->ns_cleanerd_wq,
- nilfs_ioctl_test_cond(nilfs, wc.wc_cond));
- lock_kernel();
- nilfs_ioctl_clear_cond(nilfs, wc.wc_cond);
-
- if (ret > 0) {
- jiffies_to_timespec(ret, &wc.wc_timeout);
- if (copy_to_user(argp, &wc, sizeof(wc)))
- return -EFAULT;
- return 0;
- }
- if (ret != 0)
- return -EINTR;
+ if (ret < 0)
+ nilfs_remove_all_gcinode(nilfs);
+ clear_nilfs_gc_running(nilfs);
- return wc.wc_flags ? -ETIME : 0;
+ out_free:
+ while (--n >= 0)
+ vfree(kbufs[n]);
+ kfree(kbufs[4]);
+ return ret;
}
static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
return 0;
}
-int nilfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
+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 = NILFS_SB(inode->i_sb)->s_nilfs;
+ 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 NILFS_IOCTL_DELETE_CHECKPOINT:
return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
case NILFS_IOCTL_GET_CPINFO:
- return nilfs_ioctl_get_cpinfo(inode, filp, cmd, argp);
+ 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_suinfo(inode, filp, cmd, argp);
+ 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:
- /* XXX: rename to ??? */
- return nilfs_ioctl_get_vinfo(inode, filp, cmd, argp);
+ 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_TIMEDWAIT:
- return nilfs_ioctl_timedwait(inode, filp, cmd, argp);
case NILFS_IOCTL_SYNC:
return nilfs_ioctl_sync(inode, filp, cmd, argp);
default:
return -ENOTTY;
}
}
-
-/* compat_ioctl */
-#ifdef CONFIG_COMPAT
-#include <linux/compat.h>
-
-static int nilfs_compat_locked_ioctl(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- int ret;
-
- lock_kernel();
- ret = nilfs_ioctl(inode, filp, cmd, arg);
- unlock_kernel();
- return ret;
-}
-
-static int
-nilfs_compat_ioctl_uargv32_to_uargv(struct nilfs_argv32 __user *uargv32,
- struct nilfs_argv __user *uargv)
-{
- compat_uptr_t base;
- compat_size_t nmembs, size;
- compat_int_t index, flags;
-
- if (get_user(base, &uargv32->v_base) ||
- put_user(compat_ptr(base), &uargv->v_base) ||
- get_user(nmembs, &uargv32->v_nmembs) ||
- put_user(nmembs, &uargv->v_nmembs) ||
- get_user(size, &uargv32->v_size) ||
- put_user(size, &uargv->v_size) ||
- get_user(index, &uargv32->v_index) ||
- put_user(index, &uargv->v_index) ||
- get_user(flags, &uargv32->v_flags) ||
- put_user(flags, &uargv->v_flags))
- return -EFAULT;
- return 0;
-}
-
-static int
-nilfs_compat_ioctl_uargv_to_uargv32(struct nilfs_argv __user *uargv,
- struct nilfs_argv32 __user *uargv32)
-{
- size_t nmembs;
-
- if (get_user(nmembs, &uargv->v_nmembs) ||
- put_user(nmembs, &uargv32->v_nmembs))
- return -EFAULT;
- return 0;
-}
-
-static int
-nilfs_compat_ioctl_get_by_argv(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- struct nilfs_argv __user *uargv;
- struct nilfs_argv32 __user *uargv32;
- int ret;
-
- uargv = compat_alloc_user_space(sizeof(struct nilfs_argv));
- uargv32 = compat_ptr(arg);
- ret = nilfs_compat_ioctl_uargv32_to_uargv(uargv32, uargv);
- if (ret < 0)
- return ret;
-
- ret = nilfs_compat_locked_ioctl(inode, filp, cmd, (unsigned long)uargv);
- if (ret < 0)
- return ret;
-
- return nilfs_compat_ioctl_uargv_to_uargv32(uargv, uargv32);
-}
-
-static int
-nilfs_compat_ioctl_change_cpmode(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- struct nilfs_cpmode __user *ucpmode;
- struct nilfs_cpmode32 __user *ucpmode32;
- int mode;
-
- ucpmode = compat_alloc_user_space(sizeof(struct nilfs_cpmode));
- ucpmode32 = compat_ptr(arg);
- if (copy_in_user(&ucpmode->cm_cno, &ucpmode32->cm_cno,
- sizeof(__u64)) ||
- get_user(mode, &ucpmode32->cm_mode) ||
- put_user(mode, &ucpmode->cm_mode))
- return -EFAULT;
-
- return nilfs_compat_locked_ioctl(
- inode, filp, cmd, (unsigned long)ucpmode);
-}
-
-
-static inline int
-nilfs_compat_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
-}
-
-static inline int
-nilfs_compat_ioctl_get_cpinfo(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
-}
-
-static inline int
-nilfs_compat_ioctl_get_cpstat(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
-}
-
-static inline int
-nilfs_compat_ioctl_get_suinfo(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
-}
-
-static int
-nilfs_compat_ioctl_get_sustat(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- struct nilfs_sustat __user *usustat;
- struct nilfs_sustat32 __user *usustat32;
- time_t ctime, nongc_ctime;
- int ret;
-
- usustat = compat_alloc_user_space(sizeof(struct nilfs_sustat));
- ret = nilfs_compat_locked_ioctl(inode, filp, cmd,
- (unsigned long)usustat);
- if (ret < 0)
- return ret;
-
- usustat32 = compat_ptr(arg);
- if (copy_in_user(&usustat32->ss_nsegs, &usustat->ss_nsegs,
- sizeof(__u64)) ||
- copy_in_user(&usustat32->ss_ncleansegs, &usustat->ss_ncleansegs,
- sizeof(__u64)) ||
- copy_in_user(&usustat32->ss_ndirtysegs, &usustat->ss_ndirtysegs,
- sizeof(__u64)) ||
- get_user(ctime, &usustat->ss_ctime) ||
- put_user(ctime, &usustat32->ss_ctime) ||
- get_user(nongc_ctime, &usustat->ss_nongc_ctime) ||
- put_user(nongc_ctime, &usustat32->ss_nongc_ctime))
- return -EFAULT;
- return 0;
-}
-
-static inline int
-nilfs_compat_ioctl_get_vinfo(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
-}
-
-static inline int
-nilfs_compat_ioctl_get_bdescs(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
-}
-
-static int
-nilfs_compat_ioctl_clean_segments(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- struct nilfs_argv __user *uargv;
- struct nilfs_argv32 __user *uargv32;
- int i, ret;
-
- uargv = compat_alloc_user_space(sizeof(struct nilfs_argv) * 5);
- uargv32 = compat_ptr(arg);
- for (i = 0; i < 5; i++) {
- ret = nilfs_compat_ioctl_uargv32_to_uargv(&uargv32[i],
- &uargv[i]);
- if (ret < 0)
- return ret;
- }
- return nilfs_compat_locked_ioctl(
- inode, filp, cmd, (unsigned long)uargv);
-}
-
-static int
-nilfs_compat_ioctl_timedwait(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- struct nilfs_wait_cond __user *uwcond;
- struct nilfs_wait_cond32 __user *uwcond32;
- struct timespec ts;
- int cond, flags, ret;
-
- uwcond = compat_alloc_user_space(sizeof(struct nilfs_wait_cond));
- uwcond32 = compat_ptr(arg);
- if (get_user(cond, &uwcond32->wc_cond) ||
- put_user(cond, &uwcond->wc_cond) ||
- get_user(flags, &uwcond32->wc_flags) ||
- put_user(flags, &uwcond->wc_flags) ||
- get_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) ||
- get_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec) ||
- put_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) ||
- put_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec))
- return -EFAULT;
-
- ret = nilfs_compat_locked_ioctl(inode, filp, cmd,
- (unsigned long)uwcond);
- if (ret < 0)
- return ret;
-
- if (get_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) ||
- get_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec) ||
- put_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) ||
- put_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec))
- return -EFAULT;
-
- return 0;
-}
-
-static int nilfs_compat_ioctl_sync(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
-}
-
-long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
- struct inode *inode = filp->f_dentry->d_inode;
-
- switch (cmd) {
- case NILFS_IOCTL32_CHANGE_CPMODE:
- return nilfs_compat_ioctl_change_cpmode(
- inode, filp, NILFS_IOCTL_CHANGE_CPMODE, arg);
- case NILFS_IOCTL_DELETE_CHECKPOINT:
- return nilfs_compat_ioctl_delete_checkpoint(
- inode, filp, cmd, arg);
- case NILFS_IOCTL32_GET_CPINFO:
- return nilfs_compat_ioctl_get_cpinfo(
- inode, filp, NILFS_IOCTL_GET_CPINFO, arg);
- case NILFS_IOCTL_GET_CPSTAT:
- return nilfs_compat_ioctl_get_cpstat(inode, filp, cmd, arg);
- case NILFS_IOCTL32_GET_SUINFO:
- return nilfs_compat_ioctl_get_suinfo(
- inode, filp, NILFS_IOCTL_GET_SUINFO, arg);
- case NILFS_IOCTL32_GET_SUSTAT:
- return nilfs_compat_ioctl_get_sustat(
- inode, filp, NILFS_IOCTL_GET_SUSTAT, arg);
- case NILFS_IOCTL32_GET_VINFO:
- return nilfs_compat_ioctl_get_vinfo(
- inode, filp, NILFS_IOCTL_GET_VINFO, arg);
- case NILFS_IOCTL32_GET_BDESCS:
- return nilfs_compat_ioctl_get_bdescs(
- inode, filp, NILFS_IOCTL_GET_BDESCS, arg);
- case NILFS_IOCTL32_CLEAN_SEGMENTS:
- return nilfs_compat_ioctl_clean_segments(
- inode, filp, NILFS_IOCTL_CLEAN_SEGMENTS, arg);
- case NILFS_IOCTL32_TIMEDWAIT:
- return nilfs_compat_ioctl_timedwait(
- inode, filp, NILFS_IOCTL_TIMEDWAIT, arg);
- case NILFS_IOCTL_SYNC:
- return nilfs_compat_ioctl_sync(inode, filp, cmd, arg);
- default:
- return -ENOIOCTLCMD;
- }
-}
-#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff