diff options
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/f2fs.h | 13 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 4 | ||||
| -rw-r--r-- | fs/f2fs/sysfs.c | 16 |
3 files changed, 27 insertions, 6 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index c27a6264d9bf..e15d55ccc4bc 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -966,6 +966,8 @@ struct f2fs_sb_info { block_t total_valid_block_count; /* # of valid blocks */ block_t discard_blks; /* discard command candidats */ block_t last_valid_block_count; /* for recovery */ + block_t reserved_blocks; /* configurable reserved blocks */ + u32 s_next_generation; /* for NFS support */ /* # of pages, see count_type */ @@ -1376,6 +1378,7 @@ static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, struct inode *inode, blkcnt_t *count) { blkcnt_t diff; + block_t avail_user_block_count; #ifdef CONFIG_F2FS_FAULT_INJECTION if (time_to_inject(sbi, FAULT_BLOCK)) { @@ -1391,10 +1394,11 @@ static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, spin_lock(&sbi->stat_lock); sbi->total_valid_block_count += (block_t)(*count); - if (unlikely(sbi->total_valid_block_count > sbi->user_block_count)) { - diff = sbi->total_valid_block_count - sbi->user_block_count; + avail_user_block_count = sbi->user_block_count - sbi->reserved_blocks; + if (unlikely(sbi->total_valid_block_count > avail_user_block_count)) { + diff = sbi->total_valid_block_count - avail_user_block_count; *count -= diff; - sbi->total_valid_block_count = sbi->user_block_count; + sbi->total_valid_block_count = avail_user_block_count; if (!*count) { spin_unlock(&sbi->stat_lock); percpu_counter_sub(&sbi->alloc_valid_block_count, diff); @@ -1556,7 +1560,8 @@ static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, spin_lock(&sbi->stat_lock); valid_block_count = sbi->total_valid_block_count + 1; - if (unlikely(valid_block_count > sbi->user_block_count)) { + if (unlikely(valid_block_count + sbi->reserved_blocks > + sbi->user_block_count)) { spin_unlock(&sbi->stat_lock); return false; } diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 3da6fb276f8b..c45bac6f1795 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -691,7 +691,8 @@ static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_blocks = total_count - start_count; buf->f_bfree = user_block_count - valid_user_blocks(sbi) + ovp_count; - buf->f_bavail = user_block_count - valid_user_blocks(sbi); + buf->f_bavail = user_block_count - valid_user_blocks(sbi) - + sbi->reserved_blocks; avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; @@ -1768,6 +1769,7 @@ try_onemore: sbi->total_valid_block_count = le64_to_cpu(sbi->ckpt->valid_block_count); sbi->last_valid_block_count = sbi->total_valid_block_count; + sbi->reserved_blocks = 0; for (i = 0; i < NR_INODE_TYPE; i++) { INIT_LIST_HEAD(&sbi->inode_list[i]); diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 714a3e47bbe8..9adc202fcd6f 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -30,6 +30,7 @@ enum { FAULT_INFO_RATE, /* struct f2fs_fault_info */ FAULT_INFO_TYPE, /* struct f2fs_fault_info */ #endif + RESERVED_BLOCKS, }; struct f2fs_attr { @@ -51,7 +52,7 @@ static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) return (unsigned char *)SM_I(sbi)->dcc_info; else if (struct_type == NM_INFO) return (unsigned char *)NM_I(sbi); - else if (struct_type == F2FS_SBI) + else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS) return (unsigned char *)sbi; #ifdef CONFIG_F2FS_FAULT_INJECTION else if (struct_type == FAULT_INFO_RATE || @@ -111,6 +112,17 @@ static ssize_t f2fs_sbi_store(struct f2fs_attr *a, if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX)) return -EINVAL; #endif + if (a->struct_type == RESERVED_BLOCKS) { + spin_lock(&sbi->stat_lock); + if ((unsigned long)sbi->total_valid_block_count + t > + (unsigned long)sbi->user_block_count) { + spin_unlock(&sbi->stat_lock); + return -EINVAL; + } + *ui = t; + spin_unlock(&sbi->stat_lock); + return count; + } *ui = t; return count; } @@ -165,6 +177,7 @@ F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards); +F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); @@ -208,6 +221,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(inject_type), #endif ATTR_LIST(lifetime_write_kbytes), + ATTR_LIST(reserved_blocks), NULL, }; |