diff options
author | 2009-04-06 19:01:41 -0700 | |
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committer | 2009-04-07 08:31:16 -0700 | |
commit | 7942b919f7321f95a777d396ff7894a7a83dc9b0 (patch) | |
tree | 60c63349788f8776c3ecd9ac1e02edc2c7f8769e /fs/nilfs2 | |
parent | nilfs2: block cache for garbage collection (diff) | |
download | linux-7942b919f7321f95a777d396ff7894a7a83dc9b0.tar.gz linux-7942b919f7321f95a777d396ff7894a7a83dc9b0.tar.bz2 linux-7942b919f7321f95a777d396ff7894a7a83dc9b0.zip |
nilfs2: ioctl operations
This adds userland interface implemented with ioctl.
Signed-off-by: Koji Sato <sato.koji@lab.ntt.co.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2')
-rw-r--r-- | fs/nilfs2/ioctl.c | 941 |
1 files changed, 941 insertions, 0 deletions
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c new file mode 100644 index 000000000000..35ba60ea9617 --- /dev/null +++ b/fs/nilfs2/ioctl.c @@ -0,0 +1,941 @@ +/* + * 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/smp_lock.h> /* lock_kernel(), unlock_kernel() */ +#include <linux/capability.h> /* capable() */ +#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ +#include <linux/nilfs2_fs.h> +#include "nilfs.h" +#include "segment.h" +#include "bmap.h" +#include "cpfile.h" +#include "sufile.h" +#include "dat.h" + + +#define KMALLOC_SIZE_MIN 4096 /* 4KB */ +#define KMALLOC_SIZE_MAX 131072 /* 128 KB */ + +static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, + struct nilfs_argv *argv, int dir, + ssize_t (*dofunc)(struct the_nilfs *, + int, int, + void *, size_t, size_t)) +{ + void *buf; + size_t ksize, maxmembs, total, n; + ssize_t nr; + int ret, i; + + if (argv->v_nmembs == 0) + return 0; + + for (ksize = KMALLOC_SIZE_MAX; ksize >= KMALLOC_SIZE_MIN; ksize /= 2) { + buf = kmalloc(ksize, GFP_NOFS); + if (buf != NULL) + break; + } + if (ksize < KMALLOC_SIZE_MIN) + return -ENOMEM; + maxmembs = ksize / argv->v_size; + + ret = 0; + total = 0; + 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, + (void __user *)argv->v_base + argv->v_size * i, + argv->v_size * n)) { + ret = -EFAULT; + break; + } + nr = (*dofunc)(nilfs, argv->v_index + i, argv->v_flags, buf, + argv->v_size, n); + if (nr < 0) { + ret = nr; + break; + } + if ((dir & _IOC_READ) && + copy_to_user( + (void __user *)argv->v_base + argv->v_size * i, + buf, argv->v_size * nr)) { + ret = -EFAULT; + break; + } + total += nr; + } + argv->v_nmembs = total; + + kfree(buf); + return ret; +} + +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 nilfs_transaction_info ti; + struct nilfs_cpmode cpmode; + int ret; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + if (copy_from_user(&cpmode, argp, sizeof(cpmode))) + return -EFAULT; + + nilfs_transaction_begin(inode->i_sb, &ti, 0); + ret = nilfs_cpfile_change_cpmode( + cpfile, cpmode.cm_cno, cpmode.cm_mode); + nilfs_transaction_end(inode->i_sb, !ret); + return ret; +} + +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 nilfs_transaction_info ti; + __u64 cno; + int ret; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + if (copy_from_user(&cno, argp, sizeof(cno))) + return -EFAULT; + + nilfs_transaction_begin(inode->i_sb, &ti, 0); + ret = nilfs_cpfile_delete_checkpoint(cpfile, cno); + nilfs_transaction_end(inode->i_sb, !ret); + return ret; +} + +static ssize_t +nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, int index, int flags, + void *buf, size_t size, size_t nmembs) +{ + return nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, index, 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; + struct nilfs_transaction_info ti; + int ret; + + if (copy_from_user(&argv, argp, sizeof(argv))) + return -EFAULT; + + nilfs_transaction_begin(inode->i_sb, &ti, 0); + ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), + nilfs_ioctl_do_get_cpinfo); + nilfs_transaction_end(inode->i_sb, 0); + + if (copy_to_user(argp, &argv, sizeof(argv))) + ret = -EFAULT; + return ret; +} + +static int nilfs_ioctl_get_cpstat(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 nilfs_cpstat cpstat; + struct nilfs_transaction_info ti; + int ret; + + nilfs_transaction_begin(inode->i_sb, &ti, 0); + ret = nilfs_cpfile_get_stat(cpfile, &cpstat); + nilfs_transaction_end(inode->i_sb, 0); + 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, int index, int flags, + void *buf, size_t size, size_t nmembs) +{ + return nilfs_sufile_get_suinfo(nilfs->ns_sufile, index, 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; + struct nilfs_transaction_info ti; + int ret; + + if (copy_from_user(&argv, argp, sizeof(argv))) + return -EFAULT; + + nilfs_transaction_begin(inode->i_sb, &ti, 0); + ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), + nilfs_ioctl_do_get_suinfo); + nilfs_transaction_end(inode->i_sb, 0); + + if (copy_to_user(argp, &argv, sizeof(argv))) + ret = -EFAULT; + return ret; +} + +static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, + unsigned int cmd, void __user *argp) +{ + struct inode *sufile = NILFS_SB(inode->i_sb)->s_nilfs->ns_sufile; + struct nilfs_sustat sustat; + struct nilfs_transaction_info ti; + int ret; + + nilfs_transaction_begin(inode->i_sb, &ti, 0); + ret = nilfs_sufile_get_stat(sufile, &sustat); + nilfs_transaction_end(inode->i_sb, 0); + 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, int index, 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; + struct nilfs_transaction_info ti; + int ret; + + if (copy_from_user(&argv, argp, sizeof(argv))) + return -EFAULT; + + nilfs_transaction_begin(inode->i_sb, &ti, 0); + ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), + nilfs_ioctl_do_get_vinfo); + nilfs_transaction_end(inode->i_sb, 0); + + if (copy_to_user(argp, &argv, sizeof(argv))) + ret = -EFAULT; + return ret; +} + +static ssize_t +nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, int index, int flags, + void *buf, size_t size, size_t nmembs) +{ + struct inode *dat = nilfs_dat_inode(nilfs); + struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; + struct nilfs_bdesc *bdescs = buf; + int ret, i; + + 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) + return ret; + bdescs[i].bd_blocknr = 0; + } + } + return nmembs; +} + +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 nilfs_argv argv; + struct nilfs_transaction_info ti; + int ret; + + if (copy_from_user(&argv, argp, sizeof(argv))) + return -EFAULT; + + nilfs_transaction_begin(inode->i_sb, &ti, 0); + ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), + nilfs_ioctl_do_get_bdescs); + nilfs_transaction_end(inode->i_sb, 0); + + 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; + } + bh->b_private = vdesc; + list_add_tail(&bh->b_assoc_buffers, buffers); + return 0; +} + +static ssize_t +nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, int index, int flags, + void *buf, size_t size, size_t nmembs) +{ + 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_gc_iget(nilfs, ino, cno); + if (unlikely(inode == NULL)) { + ret = -ENOMEM; + goto failed; + } + do { + ret = nilfs_ioctl_move_inode_block(inode, vdesc, + &buffers); + if (unlikely(ret < 0)) + goto failed; + vdesc++; + } while (++i < nmembs && + vdesc->vd_ino == ino && vdesc->vd_cno == cno); + } + + 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); + } + 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, int index, + int flags, void *buf, size_t size, + size_t 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 inline int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, + struct nilfs_argv *argv, + int dir) +{ + return nilfs_ioctl_wrap_copy(nilfs, argv, dir, + nilfs_ioctl_do_delete_checkpoints); +} + +static ssize_t +nilfs_ioctl_do_free_vblocknrs(struct the_nilfs *nilfs, int index, int flags, + void *buf, size_t size, size_t nmembs) +{ + int 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, int index, int flags, + void *buf, size_t size, size_t nmembs) +{ + struct inode *dat = nilfs_dat_inode(nilfs); + struct nilfs_bmap *bmap = NILFS_I(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(dat, + bdescs[i].bd_offset); + if (ret < 0) { + BUG_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); + 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, int index, 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[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; + + 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); + return ret; +} + +static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, + unsigned int cmd, void __user *argp) +{ + int 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; +} + +static int nilfs_ioctl_test_cond(struct the_nilfs *nilfs, int cond) +{ + return (cond & NILFS_TIMEDWAIT_SEG_WRITE) && + nilfs_cond_nongc_write(nilfs); +} + +static void nilfs_ioctl_clear_cond(struct the_nilfs *nilfs, int cond) +{ + if (cond & NILFS_TIMEDWAIT_SEG_WRITE) + clear_nilfs_cond_nongc_write(nilfs); +} + +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; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + if (copy_from_user(&wc, argp, sizeof(wc))) + return -EFAULT; + + 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; + + return wc.wc_flags ? -ETIME : 0; +} + +static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, + unsigned int cmd, void __user *argp) +{ + __u64 cno; + int ret; + + ret = nilfs_construct_segment(inode->i_sb); + if (ret < 0) + return ret; + + if (argp != NULL) { + cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1; + if (copy_to_user(argp, &cno, sizeof(cno))) + return -EFAULT; + } + return 0; +} + +int nilfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, + unsigned long arg) +{ + void __user *argp = (void * __user *)arg; + + switch (cmd) { + 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_cpinfo(inode, filp, cmd, argp); + 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); + 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); + 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 |