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Diffstat (limited to 'fs/nilfs2/ioctl.c')
-rw-r--r--fs/nilfs2/ioctl.c163
1 files changed, 93 insertions, 70 deletions
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index e3c693d37d69..49489f68eabe 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -25,6 +25,7 @@
#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"
@@ -297,10 +298,10 @@ static int nilfs_ioctl_move_inode_block(struct inode *inode,
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;
@@ -361,19 +362,10 @@ nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, __u64 *posp, int flags,
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;
@@ -387,36 +379,21 @@ nilfs_ioctl_do_delete_checkpoints(struct the_nilfs *nilfs, __u64 *posp,
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;
@@ -455,18 +432,10 @@ nilfs_ioctl_do_mark_blocks_dirty(struct the_nilfs *nilfs, __u64 *posp,
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)
+static int nilfs_ioctl_free_segments(struct the_nilfs *nilfs,
+ struct nilfs_argv *argv, void *buf)
{
+ size_t nmembs = argv->v_nmembs;
struct nilfs_sb_info *sbi = nilfs->ns_writer;
int ret;
@@ -481,31 +450,19 @@ nilfs_ioctl_do_free_segments(struct the_nilfs *nilfs, __u64 *posp, int flags,
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
@@ -514,7 +471,7 @@ int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
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
@@ -523,7 +480,7 @@ int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
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.
@@ -531,7 +488,7 @@ int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
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.
@@ -551,9 +508,75 @@ int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
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,
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-21 04:01:11 +0300