#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"
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,
+ 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, 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, 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;
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;
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;
return nmembs;
}
-static inline int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
- struct nilfs_argv *argv,
- int dir)
+static int nilfs_ioctl_free_segments(struct the_nilfs *nilfs,
+ struct nilfs_argv *argv, void *buf)
{
- 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);
+ size_t nmembs = argv->v_nmembs;
+ struct nilfs_sb_info *sbi = nilfs->ns_writer;
int ret;
- if (unlikely(!sbi))
+ if (unlikely(!sbi)) {
+ /* never happens because called for a writable mount */
+ WARN_ON(1);
return -EROFS;
+ }
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];
const char *msg;
- int dir, ret;
-
- if (copy_from_user(argv, argp, sizeof(argv)))
- return -EFAULT;
+ int ret;
- dir = _IOC_WRITE;
- ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], dir);
+ ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], kbufs[0]);
if (ret < 0) {
msg = "cannot read source blocks";
goto failed;
}
- ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], dir);
+
+ ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
if (ret < 0) {
/*
* can safely abort because checkpoints can be removed
msg = "cannot delete checkpoints";
goto failed;
}
- ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], dir);
+ ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
if (ret < 0) {
/*
* can safely abort because DAT file is updated atomically
msg = "cannot delete virtual blocks from DAT file";
goto failed;
}
- ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], dir);
+ 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;
}
- ret = nilfs_ioctl_free_segments(nilfs, &argv[4], dir);
+ ret = nilfs_ioctl_free_segments(nilfs, &argv[4], kbufs[4]);
if (ret < 0) {
/*
* can safely abort because this operation is atomic.
static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
unsigned int cmd, void __user *argp)
{
+ 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;
- return nilfs_clean_segments(inode->i_sb, argp);
+
+ if (copy_from_user(argv, argp, sizeof(argv)))
+ return -EFAULT;
+
+ 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;
+ }
+
+ 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;
+ }
+ }
+
+ ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
+
+ 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;
}
+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;
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:
git.samba.org / sfrench / cifs-2.6.git / blobdiff