diff options
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 86 |
1 files changed, 70 insertions, 16 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 19a4daf03ccb..3536bdb2d7cb 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -24,6 +24,7 @@ #include <linux/highmem.h> #include <linux/time.h> #include <linux/init.h> +#include <linux/seq_file.h> #include <linux/string.h> #include <linux/smp_lock.h> #include <linux/backing-dev.h> @@ -66,7 +67,8 @@ static void btrfs_put_super(struct super_block *sb) enum { Opt_degraded, Opt_subvol, Opt_device, Opt_nodatasum, Opt_nodatacow, Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nobarrier, - Opt_ssd, Opt_thread_pool, Opt_noacl, Opt_compress, Opt_err, + Opt_ssd, Opt_thread_pool, Opt_noacl, Opt_compress, Opt_notreelog, + Opt_ratio, Opt_flushoncommit, Opt_err, }; static match_table_t tokens = { @@ -83,6 +85,9 @@ static match_table_t tokens = { {Opt_compress, "compress"}, {Opt_ssd, "ssd"}, {Opt_noacl, "noacl"}, + {Opt_notreelog, "notreelog"}, + {Opt_flushoncommit, "flushoncommit"}, + {Opt_ratio, "metadata_ratio=%d"}, {Opt_err, NULL}, }; @@ -191,7 +196,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) info->max_extent = max_t(u64, info->max_extent, root->sectorsize); printk(KERN_INFO "btrfs: max_extent at %llu\n", - info->max_extent); + (unsigned long long)info->max_extent); } break; case Opt_max_inline: @@ -206,7 +211,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) root->sectorsize); } printk(KERN_INFO "btrfs: max_inline at %llu\n", - info->max_inline); + (unsigned long long)info->max_inline); } break; case Opt_alloc_start: @@ -216,12 +221,29 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) kfree(num); printk(KERN_INFO "btrfs: allocations start at %llu\n", - info->alloc_start); + (unsigned long long)info->alloc_start); } break; case Opt_noacl: root->fs_info->sb->s_flags &= ~MS_POSIXACL; break; + case Opt_notreelog: + printk(KERN_INFO "btrfs: disabling tree log\n"); + btrfs_set_opt(info->mount_opt, NOTREELOG); + break; + case Opt_flushoncommit: + printk(KERN_INFO "btrfs: turning on flush-on-commit\n"); + btrfs_set_opt(info->mount_opt, FLUSHONCOMMIT); + break; + case Opt_ratio: + intarg = 0; + match_int(&args[0], &intarg); + if (intarg) { + info->metadata_ratio = intarg; + printk(KERN_INFO "btrfs: metadata ratio %d\n", + info->metadata_ratio); + } + break; default: break; } @@ -363,9 +385,8 @@ fail_close: int btrfs_sync_fs(struct super_block *sb, int wait) { struct btrfs_trans_handle *trans; - struct btrfs_root *root; + struct btrfs_root *root = btrfs_sb(sb); int ret; - root = btrfs_sb(sb); if (sb->s_flags & MS_RDONLY) return 0; @@ -385,6 +406,44 @@ int btrfs_sync_fs(struct super_block *sb, int wait) return ret; } +static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs) +{ + struct btrfs_root *root = btrfs_sb(vfs->mnt_sb); + struct btrfs_fs_info *info = root->fs_info; + + if (btrfs_test_opt(root, DEGRADED)) + seq_puts(seq, ",degraded"); + if (btrfs_test_opt(root, NODATASUM)) + seq_puts(seq, ",nodatasum"); + if (btrfs_test_opt(root, NODATACOW)) + seq_puts(seq, ",nodatacow"); + if (btrfs_test_opt(root, NOBARRIER)) + seq_puts(seq, ",nobarrier"); + if (info->max_extent != (u64)-1) + seq_printf(seq, ",max_extent=%llu", + (unsigned long long)info->max_extent); + if (info->max_inline != 8192 * 1024) + seq_printf(seq, ",max_inline=%llu", + (unsigned long long)info->max_inline); + if (info->alloc_start != 0) + seq_printf(seq, ",alloc_start=%llu", + (unsigned long long)info->alloc_start); + if (info->thread_pool_size != min_t(unsigned long, + num_online_cpus() + 2, 8)) + seq_printf(seq, ",thread_pool=%d", info->thread_pool_size); + if (btrfs_test_opt(root, COMPRESS)) + seq_puts(seq, ",compress"); + if (btrfs_test_opt(root, SSD)) + seq_puts(seq, ",ssd"); + if (btrfs_test_opt(root, NOTREELOG)) + seq_puts(seq, ",no-treelog"); + if (btrfs_test_opt(root, FLUSHONCOMMIT)) + seq_puts(seq, ",flush-on-commit"); + if (!(root->fs_info->sb->s_flags & MS_POSIXACL)) + seq_puts(seq, ",noacl"); + return 0; +} + static void btrfs_write_super(struct super_block *sb) { sb->s_dirt = 0; @@ -589,14 +648,9 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd, if (!capable(CAP_SYS_ADMIN)) return -EPERM; - vol = kmalloc(sizeof(*vol), GFP_KERNEL); - if (!vol) - return -ENOMEM; - - if (copy_from_user(vol, (void __user *)arg, sizeof(*vol))) { - ret = -EFAULT; - goto out; - } + vol = memdup_user((void __user *)arg, sizeof(*vol)); + if (IS_ERR(vol)) + return PTR_ERR(vol); switch (cmd) { case BTRFS_IOC_SCAN_DEV: @@ -604,7 +658,7 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd, &btrfs_fs_type, &fs_devices); break; } -out: + kfree(vol); return ret; } @@ -630,7 +684,7 @@ static struct super_operations btrfs_super_ops = { .put_super = btrfs_put_super, .write_super = btrfs_write_super, .sync_fs = btrfs_sync_fs, - .show_options = generic_show_options, + .show_options = btrfs_show_options, .write_inode = btrfs_write_inode, .dirty_inode = btrfs_dirty_inode, .alloc_inode = btrfs_alloc_inode, |