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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2: (45 commits)
  nilfs2: reject filesystem with unsupported block size
  nilfs2: avoid rec_len overflow with 64KB block size
  nilfs2: simplify nilfs_get_page function
  nilfs2: reject incompatible filesystem
  nilfs2: add feature set fields to super block
  nilfs2: clarify byte offset in super block format
  nilfs2: apply read-ahead for nilfs_btree_lookup_contig
  nilfs2: introduce check flag to btree node buffer
  nilfs2: add btree get block function with readahead option
  nilfs2: add read ahead mode to nilfs_btnode_submit_block
  nilfs2: fix buffer head leak in nilfs_btnode_submit_block
  nilfs2: eliminate inline keywords in btree implementation
  nilfs2: get maximum number of child nodes from bmap object
  nilfs2: reduce repetitive calculation of max number of child nodes
  nilfs2: optimize calculation of min/max number of btree node children
  nilfs2: remove redundant pointer checks in bmap lookup functions
  nilfs2: get rid of nilfs_bmap_union
  nilfs2: unify bmap set_target_v operations
  nilfs2: get rid of nilfs_btree uses
  nilfs2: get rid of nilfs_direct uses
  ...
This commit is contained in:
Linus Torvalds 2010-08-07 13:10:55 -07:00
parent 09dc942c2a 89c0fd014d
commit a57f9a3e81
24 changed files with 1293 additions and 904 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/filesystems/nilfs2.txt
View File

@ -49,7 +49,10 @@ Mount options
NILFS2 supports the following mount options:
(*) == default
nobarrier Disables barriers.
barrier(*) This enables/disables the use of write barriers. This
nobarrier requires an IO stack which can support barriers, and
if nilfs gets an error on a barrier write, it will
disable again with a warning.
errors=continue Keep going on a filesystem error.
errors=remount-ro(*) Remount the filesystem read-only on an error.
errors=panic Panic and halt the machine if an error occurs.
@ -74,9 +77,10 @@ norecovery Disable recovery of the filesystem on mount.
This disables every write access on the device for
read-only mounts or snapshots. This option will fail
for r/w mounts on an unclean volume.
discard Issue discard/TRIM commands to the underlying block
device when blocks are freed. This is useful for SSD
devices and sparse/thinly-provisioned LUNs.
discard This enables/disables the use of discard/TRIM commands.
nodiscard(*) The discard/TRIM commands are sent to the underlying
block device when blocks are freed. This is useful
for SSD devices and sparse/thinly-provisioned LUNs.
NILFS2 usage
============

6
fs/nilfs2/bmap.c
View File

@ -26,6 +26,8 @@
#include "nilfs.h"
#include "bmap.h"
#include "sb.h"
#include "btree.h"
#include "direct.h"
#include "btnode.h"
#include "mdt.h"
#include "dat.h"
@ -533,7 +535,7 @@ void nilfs_bmap_init_gc(struct nilfs_bmap *bmap)
void nilfs_bmap_init_gcdat(struct nilfs_bmap *gcbmap, struct nilfs_bmap *bmap)
{
memcpy(gcbmap, bmap, sizeof(union nilfs_bmap_union));
memcpy(gcbmap, bmap, sizeof(*bmap));
init_rwsem(&gcbmap->b_sem);
lockdep_set_class(&bmap->b_sem, &nilfs_bmap_dat_lock_key);
gcbmap->b_inode = &NILFS_BMAP_I(gcbmap)->vfs_inode;
@ -541,7 +543,7 @@ void nilfs_bmap_init_gcdat(struct nilfs_bmap *gcbmap, struct nilfs_bmap *bmap)
void nilfs_bmap_commit_gcdat(struct nilfs_bmap *gcbmap, struct nilfs_bmap *bmap)
{
memcpy(bmap, gcbmap, sizeof(union nilfs_bmap_union));
memcpy(bmap, gcbmap, sizeof(*bmap));
init_rwsem(&bmap->b_sem);
lockdep_set_class(&bmap->b_sem, &nilfs_bmap_dat_lock_key);
bmap->b_inode = &NILFS_BMAP_I(bmap)->vfs_inode;

16
fs/nilfs2/bmap.h
View File

@ -32,11 +32,6 @@
#define NILFS_BMAP_INVALID_PTR 0
#define nilfs_bmap_dkey_to_key(dkey) le64_to_cpu(dkey)
#define nilfs_bmap_key_to_dkey(key) cpu_to_le64(key)
#define nilfs_bmap_dptr_to_ptr(dptr) le64_to_cpu(dptr)
#define nilfs_bmap_ptr_to_dptr(ptr) cpu_to_le64(ptr)
#define nilfs_bmap_keydiff_abs(diff) ((diff) < 0 ? -(diff) : (diff))
@ -71,7 +66,7 @@ struct nilfs_bmap_operations {
int (*bop_delete)(struct nilfs_bmap *, __u64);
void (*bop_clear)(struct nilfs_bmap *);
int (*bop_propagate)(const struct nilfs_bmap *, struct buffer_head *);
int (*bop_propagate)(struct nilfs_bmap *, struct buffer_head *);
void (*bop_lookup_dirty_buffers)(struct nilfs_bmap *,
struct list_head *);
@ -110,6 +105,7 @@ static inline int nilfs_bmap_is_new_ptr(unsigned long ptr)
* @b_last_allocated_ptr: last allocated ptr for data block
* @b_ptr_type: pointer type
* @b_state: state
* @b_nchildren_per_block: maximum number of child nodes for non-root nodes
*/
struct nilfs_bmap {
union {
@ -123,6 +119,7 @@ struct nilfs_bmap {
__u64 b_last_allocated_ptr;
int b_ptr_type;
int b_state;
__u16 b_nchildren_per_block;
};
/* pointer type */
@ -224,6 +221,13 @@ static inline void nilfs_bmap_abort_end_ptr(struct nilfs_bmap *bmap,
nilfs_dat_abort_end(dat, &req->bpr_req);
}
static inline void nilfs_bmap_set_target_v(struct nilfs_bmap *bmap, __u64 key,
__u64 ptr)
{
bmap->b_last_allocated_key = key;
bmap->b_last_allocated_ptr = ptr;
}
__u64 nilfs_bmap_data_get_key(const struct nilfs_bmap *,
const struct buffer_head *);

42
fs/nilfs2/bmap_union.h
View File

@ -1,42 +0,0 @@
/*
* bmap_union.h - NILFS block mapping.
*
* Copyright (C) 2006-2008 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>.
*/
#ifndef _NILFS_BMAP_UNION_H
#define _NILFS_BMAP_UNION_H
#include "bmap.h"
#include "direct.h"
#include "btree.h"
/**
* nilfs_bmap_union -
* @bi_bmap: bmap structure
* @bi_btree: direct map structure
* @bi_direct: B-tree structure
*/
union nilfs_bmap_union {
struct nilfs_bmap bi_bmap;
struct nilfs_direct bi_direct;
struct nilfs_btree bi_btree;
};
#endif /* _NILFS_BMAP_UNION_H */

23
fs/nilfs2/btnode.c
View File

@ -96,10 +96,12 @@ nilfs_btnode_create_block(struct address_space *btnc, __u64 blocknr)
}
int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
sector_t pblocknr, struct buffer_head **pbh)
sector_t pblocknr, int mode,
struct buffer_head **pbh, sector_t *submit_ptr)
{
struct buffer_head *bh;
struct inode *inode = NILFS_BTNC_I(btnc);
struct page *page;
int err;
bh = nilfs_grab_buffer(inode, btnc, blocknr, 1 << BH_NILFS_Node);
@ -107,6 +109,7 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
return -ENOMEM;
err = -EEXIST; /* internal code */
page = bh->b_page;
if (buffer_uptodate(bh) || buffer_dirty(bh))
goto found;
@ -125,7 +128,16 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
}
}
}
lock_buffer(bh);
if (mode == READA) {
if (pblocknr != *submit_ptr + 1 || !trylock_buffer(bh)) {
err = -EBUSY; /* internal code */
brelse(bh);
goto out_locked;
}
} else { /* mode == READ */
lock_buffer(bh);
}
if (buffer_uptodate(bh)) {
unlock_buffer(bh);
err = -EEXIST; /* internal code */
@ -136,15 +148,16 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
bh->b_blocknr = pblocknr; /* set block address for read */
bh->b_end_io = end_buffer_read_sync;
get_bh(bh);
submit_bh(READ, bh);
submit_bh(mode, bh);
bh->b_blocknr = blocknr; /* set back to the given block address */
*submit_ptr = pblocknr;
err = 0;
found:
*pbh = bh;
out_locked:
unlock_page(bh->b_page);
page_cache_release(bh->b_page);
unlock_page(page);
page_cache_release(page);
return err;
}

4
fs/nilfs2/btnode.h
View File

@ -42,8 +42,8 @@ void nilfs_btnode_cache_init(struct address_space *, struct backing_dev_info *);
void nilfs_btnode_cache_clear(struct address_space *);
struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
__u64 blocknr);
int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t,
struct buffer_head **);
int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int,
struct buffer_head **, sector_t *);
void nilfs_btnode_delete(struct buffer_head *);
int nilfs_btnode_prepare_change_key(struct address_space *,
struct nilfs_btnode_chkey_ctxt *);

914
fs/nilfs2/btree.c
View File

File diff suppressed because it is too large Load Diff

12
fs/nilfs2/btree.h
View File

@ -30,14 +30,6 @@
#include "btnode.h"
#include "bmap.h"
/**
* struct nilfs_btree - B-tree structure
* @bt_bmap: bmap base structure
*/
struct nilfs_btree {
struct nilfs_bmap bt_bmap;
};
/**
* struct nilfs_btree_path - A path on which B-tree operations are executed
* @bp_bh: buffer head of node block
@ -54,7 +46,7 @@ struct nilfs_btree_path {
union nilfs_bmap_ptr_req bp_oldreq;
union nilfs_bmap_ptr_req bp_newreq;
struct nilfs_btnode_chkey_ctxt bp_ctxt;
void (*bp_op)(struct nilfs_btree *, struct nilfs_btree_path *,
void (*bp_op)(struct nilfs_bmap *, struct nilfs_btree_path *,
int, __u64 *, __u64 *);
};
@ -80,4 +72,6 @@ int nilfs_btree_convert_and_insert(struct nilfs_bmap *, __u64, __u64,
const __u64 *, const __u64 *, int);
void nilfs_btree_init_gc(struct nilfs_bmap *);
int nilfs_btree_broken_node_block(struct buffer_head *bh);
#endif /* _NILFS_BTREE_H */

33
fs/nilfs2/dir.c
View File

@ -141,7 +141,7 @@ static void nilfs_check_page(struct page *page)
}
for (offs = 0; offs <= limit - NILFS_DIR_REC_LEN(1); offs += rec_len) {
p = (struct nilfs_dir_entry *)(kaddr + offs);
rec_len = le16_to_cpu(p->rec_len);
rec_len = nilfs_rec_len_from_disk(p->rec_len);
if (rec_len < NILFS_DIR_REC_LEN(1))
goto Eshort;
@ -199,13 +199,10 @@ fail:
static struct page *nilfs_get_page(struct inode *dir, unsigned long n)
{
struct address_space *mapping = dir->i_mapping;
struct page *page = read_cache_page(mapping, n,
(filler_t *)mapping->a_ops->readpage, NULL);
struct page *page = read_mapping_page(mapping, n, NULL);
if (!IS_ERR(page)) {
wait_on_page_locked(page);
kmap(page);
if (!PageUptodate(page))
goto fail;
if (!PageChecked(page))
nilfs_check_page(page);
if (PageError(page))
@ -238,7 +235,8 @@ nilfs_match(int len, const unsigned char *name, struct nilfs_dir_entry *de)
*/
static struct nilfs_dir_entry *nilfs_next_entry(struct nilfs_dir_entry *p)
{
return (struct nilfs_dir_entry *)((char *)p + le16_to_cpu(p->rec_len));
return (struct nilfs_dir_entry *)((char *)p +
nilfs_rec_len_from_disk(p->rec_len));
}
static unsigned char
@ -329,7 +327,7 @@ static int nilfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
goto success;
}
}
filp->f_pos += le16_to_cpu(de->rec_len);
filp->f_pos += nilfs_rec_len_from_disk(de->rec_len);
}
nilfs_put_page(page);
}
@ -444,7 +442,7 @@ void nilfs_set_link(struct inode *dir, struct nilfs_dir_entry *de,
struct page *page, struct inode *inode)
{
unsigned from = (char *) de - (char *) page_address(page);
unsigned to = from + le16_to_cpu(de->rec_len);
unsigned to = from + nilfs_rec_len_from_disk(de->rec_len);
struct address_space *mapping = page->mapping;
int err;
@ -500,7 +498,7 @@ int nilfs_add_link(struct dentry *dentry, struct inode *inode)
/* We hit i_size */
name_len = 0;
rec_len = chunk_size;
de->rec_len = cpu_to_le16(chunk_size);
de->rec_len = nilfs_rec_len_to_disk(chunk_size);
de->inode = 0;
goto got_it;
}
@ -514,7 +512,7 @@ int nilfs_add_link(struct dentry *dentry, struct inode *inode)
if (nilfs_match(namelen, name, de))
goto out_unlock;
name_len = NILFS_DIR_REC_LEN(de->name_len);
rec_len = le16_to_cpu(de->rec_len);
rec_len = nilfs_rec_len_from_disk(de->rec_len);
if (!de->inode && rec_len >= reclen)
goto got_it;
if (rec_len >= name_len + reclen)
@ -537,8 +535,8 @@ got_it:
struct nilfs_dir_entry *de1;
de1 = (struct nilfs_dir_entry *)((char *)de + name_len);
de1->rec_len = cpu_to_le16(rec_len - name_len);
de->rec_len = cpu_to_le16(name_len);
de1->rec_len = nilfs_rec_len_to_disk(rec_len - name_len);
de->rec_len = nilfs_rec_len_to_disk(name_len);
de = de1;
}
de->name_len = namelen;
@ -569,7 +567,8 @@ int nilfs_delete_entry(struct nilfs_dir_entry *dir, struct page *page)
struct inode *inode = mapping->host;
char *kaddr = page_address(page);
unsigned from = ((char *)dir - kaddr) & ~(nilfs_chunk_size(inode) - 1);
unsigned to = ((char *)dir - kaddr) + le16_to_cpu(dir->rec_len);
unsigned to = ((char *)dir - kaddr) +
nilfs_rec_len_from_disk(dir->rec_len);
struct nilfs_dir_entry *pde = NULL;
struct nilfs_dir_entry *de = (struct nilfs_dir_entry *)(kaddr + from);
int err;
@ -590,7 +589,7 @@ int nilfs_delete_entry(struct nilfs_dir_entry *dir, struct page *page)
err = nilfs_prepare_chunk(page, mapping, from, to);
BUG_ON(err);
if (pde)
pde->rec_len = cpu_to_le16(to - from);
pde->rec_len = nilfs_rec_len_to_disk(to - from);
dir->inode = 0;
nilfs_commit_chunk(page, mapping, from, to);
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
@ -624,14 +623,14 @@ int nilfs_make_empty(struct inode *inode, struct inode *parent)
memset(kaddr, 0, chunk_size);
de = (struct nilfs_dir_entry *)kaddr;
de->name_len = 1;
de->rec_len = cpu_to_le16(NILFS_DIR_REC_LEN(1));
de->rec_len = nilfs_rec_len_to_disk(NILFS_DIR_REC_LEN(1));
memcpy(de->name, ".\0\0", 4);
de->inode = cpu_to_le64(inode->i_ino);
nilfs_set_de_type(de, inode);
de = (struct nilfs_dir_entry *)(kaddr + NILFS_DIR_REC_LEN(1));
de->name_len = 2;
de->rec_len = cpu_to_le16(chunk_size - NILFS_DIR_REC_LEN(1));
de->rec_len = nilfs_rec_len_to_disk(chunk_size - NILFS_DIR_REC_LEN(1));
de->inode = cpu_to_le64(parent->i_ino);
memcpy(de->name, "..\0", 4);
nilfs_set_de_type(de, inode);

96
fs/nilfs2/direct.c
View File

@ -27,47 +27,43 @@
#include "alloc.h"
#include "dat.h"
static inline __le64 *nilfs_direct_dptrs(const struct nilfs_direct *direct)
static inline __le64 *nilfs_direct_dptrs(const struct nilfs_bmap *direct)
{
return (__le64 *)
((struct nilfs_direct_node *)direct->d_bmap.b_u.u_data + 1);
((struct nilfs_direct_node *)direct->b_u.u_data + 1);
}
static inline __u64
nilfs_direct_get_ptr(const struct nilfs_direct *direct, __u64 key)
nilfs_direct_get_ptr(const struct nilfs_bmap *direct, __u64 key)
{
return nilfs_bmap_dptr_to_ptr(*(nilfs_direct_dptrs(direct) + key));
return le64_to_cpu(*(nilfs_direct_dptrs(direct) + key));
}
static inline void nilfs_direct_set_ptr(struct nilfs_direct *direct,
static inline void nilfs_direct_set_ptr(struct nilfs_bmap *direct,
__u64 key, __u64 ptr)
{
*(nilfs_direct_dptrs(direct) + key) = nilfs_bmap_ptr_to_dptr(ptr);
*(nilfs_direct_dptrs(direct) + key) = cpu_to_le64(ptr);
}
static int nilfs_direct_lookup(const struct nilfs_bmap *bmap,
static int nilfs_direct_lookup(const struct nilfs_bmap *direct,
__u64 key, int level, __u64 *ptrp)
{
struct nilfs_direct *direct;
__u64 ptr;
direct = (struct nilfs_direct *)bmap; /* XXX: use macro for level 1 */
if (key > NILFS_DIRECT_KEY_MAX || level != 1)
return -ENOENT;
ptr = nilfs_direct_get_ptr(direct, key);
if (ptr == NILFS_BMAP_INVALID_PTR)
return -ENOENT;
if (ptrp != NULL)
*ptrp = ptr;
*ptrp = ptr;
return 0;
}
static int nilfs_direct_lookup_contig(const struct nilfs_bmap *bmap,
static int nilfs_direct_lookup_contig(const struct nilfs_bmap *direct,
__u64 key, __u64 *ptrp,
unsigned maxblocks)
{
struct nilfs_direct *direct = (struct nilfs_direct *)bmap;
struct inode *dat = NULL;
__u64 ptr, ptr2;
sector_t blocknr;
@ -79,8 +75,8 @@ static int nilfs_direct_lookup_contig(const struct nilfs_bmap *bmap,
if (ptr == NILFS_BMAP_INVALID_PTR)
return -ENOENT;
if (NILFS_BMAP_USE_VBN(bmap)) {
dat = nilfs_bmap_get_dat(bmap);
if (NILFS_BMAP_USE_VBN(direct)) {
dat = nilfs_bmap_get_dat(direct);
ret = nilfs_dat_translate(dat, ptr, &blocknr);
if (ret < 0)
return ret;
@ -106,29 +102,21 @@ static int nilfs_direct_lookup_contig(const struct nilfs_bmap *bmap,
}
static __u64
nilfs_direct_find_target_v(const struct nilfs_direct *direct, __u64 key)
nilfs_direct_find_target_v(const struct nilfs_bmap *direct, __u64 key)
{
__u64 ptr;
ptr = nilfs_bmap_find_target_seq(&direct->d_bmap, key);
ptr = nilfs_bmap_find_target_seq(direct, key);
if (ptr != NILFS_BMAP_INVALID_PTR)
/* sequential access */
return ptr;
else
/* block group */
return nilfs_bmap_find_target_in_group(&direct->d_bmap);
}
static void nilfs_direct_set_target_v(struct nilfs_direct *direct,
__u64 key, __u64 ptr)
{
direct->d_bmap.b_last_allocated_key = key;
direct->d_bmap.b_last_allocated_ptr = ptr;
return nilfs_bmap_find_target_in_group(direct);
}
static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
{
struct nilfs_direct *direct = (struct nilfs_direct *)bmap;
union nilfs_bmap_ptr_req req;
struct inode *dat = NULL;
struct buffer_head *bh;
@ -136,11 +124,11 @@ static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
if (key > NILFS_DIRECT_KEY_MAX)
return -ENOENT;
if (nilfs_direct_get_ptr(direct, key) != NILFS_BMAP_INVALID_PTR)
if (nilfs_direct_get_ptr(bmap, key) != NILFS_BMAP_INVALID_PTR)
return -EEXIST;
if (NILFS_BMAP_USE_VBN(bmap)) {
req.bpr_ptr = nilfs_direct_find_target_v(direct, key);
req.bpr_ptr = nilfs_direct_find_target_v(bmap, key);
dat = nilfs_bmap_get_dat(bmap);
}
ret = nilfs_bmap_prepare_alloc_ptr(bmap, &req, dat);
@ -150,13 +138,13 @@ static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
set_buffer_nilfs_volatile(bh);
nilfs_bmap_commit_alloc_ptr(bmap, &req, dat);
nilfs_direct_set_ptr(direct, key, req.bpr_ptr);
nilfs_direct_set_ptr(bmap, key, req.bpr_ptr);
if (!nilfs_bmap_dirty(bmap))
nilfs_bmap_set_dirty(bmap);
if (NILFS_BMAP_USE_VBN(bmap))
nilfs_direct_set_target_v(direct, key, req.bpr_ptr);
nilfs_bmap_set_target_v(bmap, key, req.bpr_ptr);
nilfs_bmap_add_blocks(bmap, 1);
}
@ -165,33 +153,30 @@ static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
static int nilfs_direct_delete(struct nilfs_bmap *bmap, __u64 key)
{
struct nilfs_direct *direct = (struct nilfs_direct *)bmap;
union nilfs_bmap_ptr_req req;
struct inode *dat;
int ret;
if (key > NILFS_DIRECT_KEY_MAX ||
nilfs_direct_get_ptr(direct, key) == NILFS_BMAP_INVALID_PTR)
nilfs_direct_get_ptr(bmap, key) == NILFS_BMAP_INVALID_PTR)
return -ENOENT;
dat = NILFS_BMAP_USE_VBN(bmap) ? nilfs_bmap_get_dat(bmap) : NULL;
req.bpr_ptr = nilfs_direct_get_ptr(direct, key);
req.bpr_ptr = nilfs_direct_get_ptr(bmap, key);
ret = nilfs_bmap_prepare_end_ptr(bmap, &req, dat);
if (!ret) {
nilfs_bmap_commit_end_ptr(bmap, &req, dat);
nilfs_direct_set_ptr(direct, key, NILFS_BMAP_INVALID_PTR);
nilfs_direct_set_ptr(bmap, key, NILFS_BMAP_INVALID_PTR);
nilfs_bmap_sub_blocks(bmap, 1);
}
return ret;
}
static int nilfs_direct_last_key(const struct nilfs_bmap *bmap, __u64 *keyp)
static int nilfs_direct_last_key(const struct nilfs_bmap *direct, __u64 *keyp)
{
struct nilfs_direct *direct;
__u64 key, lastkey;
direct = (struct nilfs_direct *)bmap;
lastkey = NILFS_DIRECT_KEY_MAX + 1;
for (key = NILFS_DIRECT_KEY_MIN; key <= NILFS_DIRECT_KEY_MAX; key++)
if (nilfs_direct_get_ptr(direct, key) !=
@ -211,15 +196,13 @@ static int nilfs_direct_check_insert(const struct nilfs_bmap *bmap, __u64 key)
return key > NILFS_DIRECT_KEY_MAX;
}
static int nilfs_direct_gather_data(struct nilfs_bmap *bmap,
static int nilfs_direct_gather_data(struct nilfs_bmap *direct,
__u64 *keys, __u64 *ptrs, int nitems)
{
struct nilfs_direct *direct;
__u64 key;
__u64 ptr;
int n;
direct = (struct nilfs_direct *)bmap;
if (nitems > NILFS_DIRECT_NBLOCKS)
nitems = NILFS_DIRECT_NBLOCKS;
n = 0;
@ -237,7 +220,6 @@ static int nilfs_direct_gather_data(struct nilfs_bmap *bmap,
int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
__u64 key, __u64 *keys, __u64 *ptrs, int n)
{
struct nilfs_direct *direct;
__le64 *dptrs;
int ret, i, j;
@ -253,12 +235,11 @@ int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
bmap->b_ops->bop_clear(bmap);
/* convert */
direct = (struct nilfs_direct *)bmap;
dptrs = nilfs_direct_dptrs(direct);
dptrs = nilfs_direct_dptrs(bmap);
for (i = 0, j = 0; i < NILFS_DIRECT_NBLOCKS; i++) {
if ((j < n) && (i == keys[j])) {
dptrs[i] = (i != key) ?
nilfs_bmap_ptr_to_dptr(ptrs[j]) :
cpu_to_le64(ptrs[j]) :
NILFS_BMAP_INVALID_PTR;
j++;
} else
@ -269,10 +250,9 @@ int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
return 0;
}
static int nilfs_direct_propagate(const struct nilfs_bmap *bmap,
static int nilfs_direct_propagate(struct nilfs_bmap *bmap,
struct buffer_head *bh)
{
struct nilfs_direct *direct = (struct nilfs_direct *)bmap;
struct nilfs_palloc_req oldreq, newreq;
struct inode *dat;
__u64 key;
@ -284,7 +264,7 @@ static int nilfs_direct_propagate(const struct nilfs_bmap *bmap,
dat = nilfs_bmap_get_dat(bmap);
key = nilfs_bmap_data_get_key(bmap, bh);
ptr = nilfs_direct_get_ptr(direct, key);
ptr = nilfs_direct_get_ptr(bmap, key);
if (!buffer_nilfs_volatile(bh)) {
oldreq.pr_entry_nr = ptr;
newreq.pr_entry_nr = ptr;
@ -294,20 +274,20 @@ static int nilfs_direct_propagate(const struct nilfs_bmap *bmap,
nilfs_dat_commit_update(dat, &oldreq, &newreq,
bmap->b_ptr_type == NILFS_BMAP_PTR_VS);
set_buffer_nilfs_volatile(bh);
nilfs_direct_set_ptr(direct, key, newreq.pr_entry_nr);
nilfs_direct_set_ptr(bmap, key, newreq.pr_entry_nr);
} else
ret = nilfs_dat_mark_dirty(dat, ptr);
return ret;
}
static int nilfs_direct_assign_v(struct nilfs_direct *direct,
static int nilfs_direct_assign_v(struct nilfs_bmap *direct,
__u64 key, __u64 ptr,
struct buffer_head **bh,
sector_t blocknr,
union nilfs_binfo *binfo)
{
struct inode *dat = nilfs_bmap_get_dat(&direct->d_bmap);
struct inode *dat = nilfs_bmap_get_dat(direct);
union nilfs_bmap_ptr_req req;
int ret;
@ -315,13 +295,13 @@ static int nilfs_direct_assign_v(struct nilfs_direct *direct,
ret = nilfs_dat_prepare_start(dat, &req.bpr_req);
if (!ret) {
nilfs_dat_commit_start(dat, &req.bpr_req, blocknr);
binfo->bi_v.bi_vblocknr = nilfs_bmap_ptr_to_dptr(ptr);
binfo->bi_v.bi_blkoff = nilfs_bmap_key_to_dkey(key);
binfo->bi_v.bi_vblocknr = cpu_to_le64(ptr);
binfo->bi_v.bi_blkoff = cpu_to_le64(key);
}
return ret;
}
static int nilfs_direct_assign_p(struct nilfs_direct *direct,
static int nilfs_direct_assign_p(struct nilfs_bmap *direct,
__u64 key, __u64 ptr,
struct buffer_head **bh,
sector_t blocknr,
@ -329,7 +309,7 @@ static int nilfs_direct_assign_p(struct nilfs_direct *direct,
{
nilfs_direct_set_ptr(direct, key, blocknr);
binfo->bi_dat.bi_blkoff = nilfs_bmap_key_to_dkey(key);
binfo->bi_dat.bi_blkoff = cpu_to_le64(key);
binfo->bi_dat.bi_level = 0;
return 0;
@ -340,18 +320,16 @@ static int nilfs_direct_assign(struct nilfs_bmap *bmap,
sector_t blocknr,
union nilfs_binfo *binfo)
{
struct nilfs_direct *direct;
__u64 key;
__u64 ptr;
direct = (struct nilfs_direct *)bmap;
key = nilfs_bmap_data_get_key(bmap, *bh);
if (unlikely(key > NILFS_DIRECT_KEY_MAX)) {
printk(KERN_CRIT "%s: invalid key: %llu\n", __func__,
(unsigned long long)key);
return -EINVAL;
}
ptr = nilfs_direct_get_ptr(direct, key);
ptr = nilfs_direct_get_ptr(bmap, key);
if (unlikely(ptr == NILFS_BMAP_INVALID_PTR)) {
printk(KERN_CRIT "%s: invalid pointer: %llu\n", __func__,
(unsigned long long)ptr);
@ -359,8 +337,8 @@ static int nilfs_direct_assign(struct nilfs_bmap *bmap,
}
return NILFS_BMAP_USE_VBN(bmap) ?
nilfs_direct_assign_v(direct, key, ptr, bh, blocknr, binfo) :
nilfs_direct_assign_p(direct, key, ptr, bh, blocknr, binfo);
nilfs_direct_assign_v(bmap, key, ptr, bh, blocknr, binfo) :
nilfs_direct_assign_p(bmap, key, ptr, bh, blocknr, binfo);
}
static const struct nilfs_bmap_operations nilfs_direct_ops = {

11
fs/nilfs2/direct.h
View File

@ -28,8 +28,6 @@
#include "bmap.h"
struct nilfs_direct;
/**
* struct nilfs_direct_node - direct node
* @dn_flags: flags
@ -40,15 +38,6 @@ struct nilfs_direct_node {
__u8 pad[7];
};
/**
* struct nilfs_direct - direct mapping
* @d_bmap: bmap structure
*/
struct nilfs_direct {
struct nilfs_bmap d_bmap;
};
#define NILFS_DIRECT_NBLOCKS (NILFS_BMAP_SIZE / sizeof(__le64) - 1)
#define NILFS_DIRECT_KEY_MIN 0
#define NILFS_DIRECT_KEY_MAX (NILFS_DIRECT_NBLOCKS - 1)

17
fs/nilfs2/gcinode.c
View File

@ -48,6 +48,8 @@
#include <linux/slab.h>
#include <linux/swap.h>
#include "nilfs.h"
#include "btree.h"
#include "btnode.h"
#include "page.h"
#include "mdt.h"
#include "dat.h"
@ -149,8 +151,10 @@ int nilfs_gccache_submit_read_data(struct inode *inode, sector_t blkoff,
int nilfs_gccache_submit_read_node(struct inode *inode, sector_t pbn,
__u64 vbn, struct buffer_head **out_bh)
{
int ret = nilfs_btnode_submit_block(&NILFS_I(inode)->i_btnode_cache,
vbn ? : pbn, pbn, out_bh);
int ret;
ret = nilfs_btnode_submit_block(&NILFS_I(inode)->i_btnode_cache,
vbn ? : pbn, pbn, READ, out_bh, &pbn);
if (ret == -EEXIST) /* internal code (cache hit) */
ret = 0;
return ret;
@ -164,10 +168,15 @@ int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *bh)
if (buffer_dirty(bh))
return -EEXIST;
if (buffer_nilfs_node(bh))
if (buffer_nilfs_node(bh)) {
if (nilfs_btree_broken_node_block(bh)) {
clear_buffer_uptodate(bh);
return -EIO;
}
nilfs_btnode_mark_dirty(bh);
else
} else {
nilfs_mdt_mark_buffer_dirty(bh);
}
return 0;
}

1
fs/nilfs2/mdt.c
View File

@ -28,6 +28,7 @@
#include <linux/swap.h>
#include <linux/slab.h>
#include "nilfs.h"
#include "btnode.h"
#include "segment.h"
#include "page.h"
#include "mdt.h"

22
fs/nilfs2/nilfs.h
View File

@ -32,7 +32,6 @@
#include "the_nilfs.h"
#include "sb.h"
#include "bmap.h"
#include "bmap_union.h"
/*
* nilfs inode data in memory
@ -41,7 +40,7 @@ struct nilfs_inode_info {
__u32 i_flags;
unsigned long i_state; /* Dynamic state flags */
struct nilfs_bmap *i_bmap;
union nilfs_bmap_union i_bmap_union;
struct nilfs_bmap i_bmap_data;
__u64 i_xattr; /* sector_t ??? */
__u32 i_dir_start_lookup;
__u64 i_cno; /* check point number for GC inode */
@ -71,9 +70,7 @@ static inline struct nilfs_inode_info *NILFS_I(const struct inode *inode)
static inline struct nilfs_inode_info *
NILFS_BMAP_I(const struct nilfs_bmap *bmap)
{
return container_of((union nilfs_bmap_union *)bmap,
struct nilfs_inode_info,
i_bmap_union);
return container_of(bmap, struct nilfs_inode_info, i_bmap_data);
}
static inline struct inode *NILFS_BTNC_I(struct address_space *btnc)
@ -106,6 +103,14 @@ enum {
NILFS_I_GCDAT, /* shadow DAT, on memory only */
};
/*
* commit flags for nilfs_commit_super and nilfs_sync_super
*/
enum {
NILFS_SB_COMMIT = 0, /* Commit a super block alternately */
NILFS_SB_COMMIT_ALL /* Commit both super blocks */
};
/*
* Macros to check inode numbers
*/
@ -270,7 +275,14 @@ extern struct nilfs_super_block *
nilfs_read_super_block(struct super_block *, u64, int, struct buffer_head **);
extern int nilfs_store_magic_and_option(struct super_block *,
struct nilfs_super_block *, char *);
extern int nilfs_check_feature_compatibility(struct super_block *,
struct nilfs_super_block *);
extern void nilfs_set_log_cursor(struct nilfs_super_block *,
struct the_nilfs *);
extern struct nilfs_super_block **nilfs_prepare_super(struct nilfs_sb_info *,
int flip);
extern int nilfs_commit_super(struct nilfs_sb_info *, int);
extern int nilfs_cleanup_super(struct nilfs_sb_info *);
extern int nilfs_attach_checkpoint(struct nilfs_sb_info *, __u64);
extern void nilfs_detach_checkpoint(struct nilfs_sb_info *);

5
fs/nilfs2/page.c
View File

@ -37,7 +37,8 @@
#define NILFS_BUFFER_INHERENT_BITS \
((1UL << BH_Uptodate) | (1UL << BH_Mapped) | (1UL << BH_NILFS_Node) | \
(1UL << BH_NILFS_Volatile) | (1UL << BH_NILFS_Allocated))
(1UL << BH_NILFS_Volatile) | (1UL << BH_NILFS_Allocated) | \
(1UL << BH_NILFS_Checked))
static struct buffer_head *
__nilfs_get_page_block(struct page *page, unsigned long block, pgoff_t index,
@ -129,6 +130,7 @@ void nilfs_forget_buffer(struct buffer_head *bh)
lock_buffer(bh);
clear_buffer_nilfs_volatile(bh);
clear_buffer_nilfs_checked(bh);
clear_buffer_dirty(bh);
if (nilfs_page_buffers_clean(page))
__nilfs_clear_page_dirty(page);
@ -480,6 +482,7 @@ void nilfs_clear_dirty_pages(struct address_space *mapping)
lock_buffer(bh);
clear_buffer_dirty(bh);
clear_buffer_nilfs_volatile(bh);
clear_buffer_nilfs_checked(bh);
clear_buffer_uptodate(bh);
clear_buffer_mapped(bh);
unlock_buffer(bh);

2
fs/nilfs2/page.h
View File

@ -34,11 +34,13 @@ enum {
BH_NILFS_Allocated = BH_PrivateStart,
BH_NILFS_Node,
BH_NILFS_Volatile,
BH_NILFS_Checked,
};
BUFFER_FNS(NILFS_Allocated, nilfs_allocated) /* nilfs private buffers */
BUFFER_FNS(NILFS_Node, nilfs_node) /* nilfs node buffers */
BUFFER_FNS(NILFS_Volatile, nilfs_volatile)
BUFFER_FNS(NILFS_Checked, nilfs_checked) /* buffer is verified */
void nilfs_mark_buffer_dirty(struct buffer_head *bh);

348
fs/nilfs2/recovery.c
View File

@ -91,27 +91,9 @@ static int nilfs_warn_segment_error(int err)
return -EINVAL;
}
static void store_segsum_info(struct nilfs_segsum_info *ssi,
struct nilfs_segment_summary *sum,
unsigned int blocksize)
{
ssi->flags = le16_to_cpu(sum->ss_flags);
ssi->seg_seq = le64_to_cpu(sum->ss_seq);
ssi->ctime = le64_to_cpu(sum->ss_create);
ssi->next = le64_to_cpu(sum->ss_next);
ssi->nblocks = le32_to_cpu(sum->ss_nblocks);
ssi->nfinfo = le32_to_cpu(sum->ss_nfinfo);
ssi->sumbytes = le32_to_cpu(sum->ss_sumbytes);
ssi->nsumblk = DIV_ROUND_UP(ssi->sumbytes, blocksize);
ssi->nfileblk = ssi->nblocks - ssi->nsumblk - !!NILFS_SEG_HAS_SR(ssi);
/* need to verify ->ss_bytes field if read ->ss_cno */
}
/**
* calc_crc_cont - check CRC of blocks continuously
* @sbi: nilfs_sb_info
* nilfs_compute_checksum - compute checksum of blocks continuously
* @nilfs: nilfs object
* @bhs: buffer head of start block
* @sum: place to store result
* @offset: offset bytes in the first block
@ -119,23 +101,25 @@ static void store_segsum_info(struct nilfs_segsum_info *ssi,
* @start: DBN of start block
* @nblock: number of blocks to be checked
*/
static int calc_crc_cont(struct nilfs_sb_info *sbi, struct buffer_head *bhs,
u32 *sum, unsigned long offset, u64 check_bytes,
sector_t start, unsigned long nblock)
static int nilfs_compute_checksum(struct the_nilfs *nilfs,
struct buffer_head *bhs, u32 *sum,
unsigned long offset, u64 check_bytes,
sector_t start, unsigned long nblock)
{
unsigned long blocksize = sbi->s_super->s_blocksize;
unsigned int blocksize = nilfs->ns_blocksize;
unsigned long size;
u32 crc;
BUG_ON(offset >= blocksize);
check_bytes -= offset;
size = min_t(u64, check_bytes, blocksize - offset);
crc = crc32_le(sbi->s_nilfs->ns_crc_seed,
crc = crc32_le(nilfs->ns_crc_seed,
(unsigned char *)bhs->b_data + offset, size);
if (--nblock > 0) {
do {
struct buffer_head *bh
= sb_bread(sbi->s_super, ++start);
struct buffer_head *bh;
bh = __bread(nilfs->ns_bdev, ++start, blocksize);
if (!bh)
return -EIO;
check_bytes -= size;
@ -150,12 +134,12 @@ static int calc_crc_cont(struct nilfs_sb_info *sbi, struct buffer_head *bhs,
/**
* nilfs_read_super_root_block - read super root block
* @sb: super_block
* @nilfs: nilfs object
* @sr_block: disk block number of the super root block
* @pbh: address of a buffer_head pointer to return super root buffer
* @check: CRC check flag
*/
int nilfs_read_super_root_block(struct super_block *sb, sector_t sr_block,
int nilfs_read_super_root_block(struct the_nilfs *nilfs, sector_t sr_block,
struct buffer_head **pbh, int check)
{
struct buffer_head *bh_sr;
@ -164,7 +148,7 @@ int nilfs_read_super_root_block(struct super_block *sb, sector_t sr_block,
int ret;
*pbh = NULL;
bh_sr = sb_bread(sb, sr_block);
bh_sr = __bread(nilfs->ns_bdev, sr_block, nilfs->ns_blocksize);
if (unlikely(!bh_sr)) {
ret = NILFS_SEG_FAIL_IO;
goto failed;
@ -174,12 +158,13 @@ int nilfs_read_super_root_block(struct super_block *sb, sector_t sr_block,
if (check) {
unsigned bytes = le16_to_cpu(sr->sr_bytes);
if (bytes == 0 || bytes > sb->s_blocksize) {
if (bytes == 0 || bytes > nilfs->ns_blocksize) {
ret = NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT;
goto failed_bh;
}
if (calc_crc_cont(NILFS_SB(sb), bh_sr, &crc,
sizeof(sr->sr_sum), bytes, sr_block, 1)) {
if (nilfs_compute_checksum(
nilfs, bh_sr, &crc, sizeof(sr->sr_sum), bytes,
sr_block, 1)) {
ret = NILFS_SEG_FAIL_IO;
goto failed_bh;
}
@ -199,64 +184,76 @@ int nilfs_read_super_root_block(struct super_block *sb, sector_t sr_block,
}
/**
* load_segment_summary - read segment summary of the specified partial segment
* @sbi: nilfs_sb_info
* @pseg_start: start disk block number of partial segment
* @seg_seq: sequence number requested
* @ssi: pointer to nilfs_segsum_info struct to store information
* nilfs_read_log_header - read summary header of the specified log
* @nilfs: nilfs object
* @start_blocknr: start block number of the log
* @sum: pointer to return segment summary structure
*/
static int
load_segment_summary(struct nilfs_sb_info *sbi, sector_t pseg_start,
u64 seg_seq, struct nilfs_segsum_info *ssi)
static struct buffer_head *
nilfs_read_log_header(struct the_nilfs *nilfs, sector_t start_blocknr,
struct nilfs_segment_summary **sum)
{
struct buffer_head *bh_sum;
struct nilfs_segment_summary *sum;
bh_sum = __bread(nilfs->ns_bdev, start_blocknr, nilfs->ns_blocksize);
if (bh_sum)
*sum = (struct nilfs_segment_summary *)bh_sum->b_data;
return bh_sum;
}
/**
* nilfs_validate_log - verify consistency of log
* @nilfs: nilfs object
* @seg_seq: sequence number of segment
* @bh_sum: buffer head of summary block
* @sum: segment summary struct
*/
static int nilfs_validate_log(struct the_nilfs *nilfs, u64 seg_seq,
struct buffer_head *bh_sum,
struct nilfs_segment_summary *sum)
{
unsigned long nblock;
u32 crc;
int ret = NILFS_SEG_FAIL_IO;
int ret;
bh_sum = sb_bread(sbi->s_super, pseg_start);
if (!bh_sum)
ret = NILFS_SEG_FAIL_MAGIC;
if (le32_to_cpu(sum->ss_magic) != NILFS_SEGSUM_MAGIC)
goto out;
sum = (struct nilfs_segment_summary *)bh_sum->b_data;
ret = NILFS_SEG_FAIL_SEQ;
if (le64_to_cpu(sum->ss_seq) != seg_seq)
goto out;
/* Check consistency of segment summary */
if (le32_to_cpu(sum->ss_magic) != NILFS_SEGSUM_MAGIC) {
ret = NILFS_SEG_FAIL_MAGIC;
goto failed;
}
store_segsum_info(ssi, sum, sbi->s_super->s_blocksize);
if (seg_seq != ssi->seg_seq) {
ret = NILFS_SEG_FAIL_SEQ;
goto failed;
}
nblock = ssi->nblocks;
if (unlikely(nblock == 0 ||
nblock > sbi->s_nilfs->ns_blocks_per_segment)) {
nblock = le32_to_cpu(sum->ss_nblocks);
ret = NILFS_SEG_FAIL_CONSISTENCY;
if (unlikely(nblock == 0 || nblock > nilfs->ns_blocks_per_segment))
/* This limits the number of blocks read in the CRC check */
ret = NILFS_SEG_FAIL_CONSISTENCY;
goto failed;
}
if (calc_crc_cont(sbi, bh_sum, &crc, sizeof(sum->ss_datasum),
((u64)nblock << sbi->s_super->s_blocksize_bits),
pseg_start, nblock)) {
ret = NILFS_SEG_FAIL_IO;
goto failed;
}
if (crc == le32_to_cpu(sum->ss_datasum))
ret = 0;
else
ret = NILFS_SEG_FAIL_CHECKSUM_FULL;
failed:
brelse(bh_sum);
out:
goto out;
ret = NILFS_SEG_FAIL_IO;
if (nilfs_compute_checksum(nilfs, bh_sum, &crc, sizeof(sum->ss_datasum),
((u64)nblock << nilfs->ns_blocksize_bits),
bh_sum->b_blocknr, nblock))
goto out;
ret = NILFS_SEG_FAIL_CHECKSUM_FULL;
if (crc != le32_to_cpu(sum->ss_datasum))
goto out;
ret = 0;
out:
return ret;
}
static void *segsum_get(struct super_block *sb, struct buffer_head **pbh,
unsigned int *offset, unsigned int bytes)
/**
* nilfs_read_summary_info - read an item on summary blocks of a log
* @nilfs: nilfs object
* @pbh: the current buffer head on summary blocks [in, out]
* @offset: the current byte offset on summary blocks [in, out]
* @bytes: byte size of the item to be read
*/
static void *nilfs_read_summary_info(struct the_nilfs *nilfs,
struct buffer_head **pbh,
unsigned int *offset, unsigned int bytes)
{
void *ptr;
sector_t blocknr;
@ -265,7 +262,8 @@ static void *segsum_get(struct super_block *sb, struct buffer_head **pbh,
if (bytes > (*pbh)->b_size - *offset) {
blocknr = (*pbh)->b_blocknr;
brelse(*pbh);
*pbh = sb_bread(sb, blocknr + 1);
*pbh = __bread(nilfs->ns_bdev, blocknr + 1,
nilfs->ns_blocksize);
if (unlikely(!*pbh))
return NULL;
*offset = 0;
@ -275,9 +273,18 @@ static void *segsum_get(struct super_block *sb, struct buffer_head **pbh,
return ptr;
}
static void segsum_skip(struct super_block *sb, struct buffer_head **pbh,
unsigned int *offset, unsigned int bytes,
unsigned long count)
/**
* nilfs_skip_summary_info - skip items on summary blocks of a log
* @nilfs: nilfs object
* @pbh: the current buffer head on summary blocks [in, out]
* @offset: the current byte offset on summary blocks [in, out]
* @bytes: byte size of the item to be skipped
* @count: number of items to be skipped
*/
static void nilfs_skip_summary_info(struct the_nilfs *nilfs,
struct buffer_head **pbh,
unsigned int *offset, unsigned int bytes,
unsigned long count)
{
unsigned int rest_item_in_current_block
= ((*pbh)->b_size - *offset) / bytes;
@ -294,36 +301,46 @@ static void segsum_skip(struct super_block *sb, struct buffer_head **pbh,
*offset = bytes * (count - (bcnt - 1) * nitem_per_block);
brelse(*pbh);
*pbh = sb_bread(sb, blocknr + bcnt);
*pbh = __bread(nilfs->ns_bdev, blocknr + bcnt,
nilfs->ns_blocksize);
}
}
static int
collect_blocks_from_segsum(struct nilfs_sb_info *sbi, sector_t sum_blocknr,
struct nilfs_segsum_info *ssi,
struct list_head *head)
/**
* nilfs_scan_dsync_log - get block information of a log written for data sync
* @nilfs: nilfs object
* @start_blocknr: start block number of the log
* @sum: log summary information
* @head: list head to add nilfs_recovery_block struct
*/
static int nilfs_scan_dsync_log(struct the_nilfs *nilfs, sector_t start_blocknr,
struct nilfs_segment_summary *sum,
struct list_head *head)
{
struct buffer_head *bh;
unsigned int offset;
unsigned long nfinfo = ssi->nfinfo;
sector_t blocknr = sum_blocknr + ssi->nsumblk;
u32 nfinfo, sumbytes;
sector_t blocknr;
ino_t ino;
int err = -EIO;
nfinfo = le32_to_cpu(sum->ss_nfinfo);
if (!nfinfo)
return 0;
bh = sb_bread(sbi->s_super, sum_blocknr);
sumbytes = le32_to_cpu(sum->ss_sumbytes);
blocknr = start_blocknr + DIV_ROUND_UP(sumbytes, nilfs->ns_blocksize);
bh = __bread(nilfs->ns_bdev, start_blocknr, nilfs->ns_blocksize);
if (unlikely(!bh))
goto out;
offset = le16_to_cpu(
((struct nilfs_segment_summary *)bh->b_data)->ss_bytes);
offset = le16_to_cpu(sum->ss_bytes);
for (;;) {
unsigned long nblocks, ndatablk, nnodeblk;
struct nilfs_finfo *finfo;
finfo = segsum_get(sbi->s_super, &bh, &offset, sizeof(*finfo));
finfo = nilfs_read_summary_info(nilfs, &bh, &offset,
sizeof(*finfo));
if (unlikely(!finfo))
goto out;
@ -336,8 +353,8 @@ collect_blocks_from_segsum(struct nilfs_sb_info *sbi, sector_t sum_blocknr,
struct nilfs_recovery_block *rb;
struct nilfs_binfo_v *binfo;
binfo = segsum_get(sbi->s_super, &bh, &offset,
sizeof(*binfo));
binfo = nilfs_read_summary_info(nilfs, &bh, &offset,
sizeof(*binfo));
if (unlikely(!binfo))
goto out;
@ -355,9 +372,9 @@ collect_blocks_from_segsum(struct nilfs_sb_info *sbi, sector_t sum_blocknr,
}
if (--nfinfo == 0)
break;
blocknr += nnodeblk; /* always 0 for the data sync segments */
segsum_skip(sbi->s_super, &bh, &offset, sizeof(__le64),
nnodeblk);
blocknr += nnodeblk; /* always 0 for data sync logs */
nilfs_skip_summary_info(nilfs, &bh, &offset, sizeof(__le64),
nnodeblk);
if (unlikely(!bh))
goto out;
}
@ -467,14 +484,14 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,
return err;
}
static int nilfs_recovery_copy_block(struct nilfs_sb_info *sbi,
static int nilfs_recovery_copy_block(struct the_nilfs *nilfs,
struct nilfs_recovery_block *rb,
struct page *page)
{
struct buffer_head *bh_org;
void *kaddr;
bh_org = sb_bread(sbi->s_super, rb->blocknr);
bh_org = __bread(nilfs->ns_bdev, rb->blocknr, nilfs->ns_blocksize);
if (unlikely(!bh_org))
return -EIO;
@ -485,13 +502,14 @@ static int nilfs_recovery_copy_block(struct nilfs_sb_info *sbi,
return 0;
}
static int recover_dsync_blocks(struct nilfs_sb_info *sbi,
struct list_head *head,
unsigned long *nr_salvaged_blocks)
static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,
struct nilfs_sb_info *sbi,
struct list_head *head,
unsigned long *nr_salvaged_blocks)
{
struct inode *inode;
struct nilfs_recovery_block *rb, *n;
unsigned blocksize = sbi->s_super->s_blocksize;
unsigned blocksize = nilfs->ns_blocksize;
struct page *page;
loff_t pos;
int err = 0, err2 = 0;
@ -511,7 +529,7 @@ static int recover_dsync_blocks(struct nilfs_sb_info *sbi,
if (unlikely(err))
goto failed_inode;
err = nilfs_recovery_copy_block(sbi, rb, page);
err = nilfs_recovery_copy_block(nilfs, rb, page);
if (unlikely(err))
goto failed_page;
@ -551,18 +569,20 @@ static int recover_dsync_blocks(struct nilfs_sb_info *sbi,
/**
* nilfs_do_roll_forward - salvage logical segments newer than the latest
* checkpoint
* @nilfs: nilfs object
* @sbi: nilfs_sb_info
* @nilfs: the_nilfs
* @ri: pointer to a nilfs_recovery_info
*/
static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
struct nilfs_sb_info *sbi,
struct nilfs_recovery_info *ri)
{
struct nilfs_segsum_info ssi;
struct buffer_head *bh_sum = NULL;
struct nilfs_segment_summary *sum;
sector_t pseg_start;
sector_t seg_start, seg_end; /* Starting/ending DBN of full segment */
unsigned long nsalvaged_blocks = 0;
unsigned int flags;
u64 seg_seq;
__u64 segnum, nextnum = 0;
int empty_seg = 0;
@ -581,8 +601,14 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);
while (segnum != ri->ri_segnum || pseg_start <= ri->ri_pseg_start) {
brelse(bh_sum);
bh_sum = nilfs_read_log_header(nilfs, pseg_start, &sum);
if (!bh_sum) {
err = -EIO;
goto failed;
}
ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi);
ret = nilfs_validate_log(nilfs, seg_seq, bh_sum, sum);
if (ret) {
if (ret == NILFS_SEG_FAIL_IO) {
err = -EIO;
@ -590,33 +616,38 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
}
goto strayed;
}
if (unlikely(NILFS_SEG_HAS_SR(&ssi)))
flags = le16_to_cpu(sum->ss_flags);
if (flags & NILFS_SS_SR)
goto confused;
/* Found a valid partial segment; do recovery actions */
nextnum = nilfs_get_segnum_of_block(nilfs, ssi.next);
nextnum = nilfs_get_segnum_of_block(nilfs,
le64_to_cpu(sum->ss_next));
empty_seg = 0;
nilfs->ns_ctime = ssi.ctime;
if (!(ssi.flags & NILFS_SS_GC))
nilfs->ns_nongc_ctime = ssi.ctime;
nilfs->ns_ctime = le64_to_cpu(sum->ss_create);
if (!(flags & NILFS_SS_GC))
nilfs->ns_nongc_ctime = nilfs->ns_ctime;
switch (state) {
case RF_INIT_ST:
if (!NILFS_SEG_LOGBGN(&ssi) || !NILFS_SEG_DSYNC(&ssi))
if (!(flags & NILFS_SS_LOGBGN) ||
!(flags & NILFS_SS_SYNDT))
goto try_next_pseg;
state = RF_DSYNC_ST;
/* Fall through */
case RF_DSYNC_ST:
if (!NILFS_SEG_DSYNC(&ssi))
if (!(flags & NILFS_SS_SYNDT))
goto confused;
err = collect_blocks_from_segsum(
sbi, pseg_start, &ssi, &dsync_blocks);
err = nilfs_scan_dsync_log(nilfs, pseg_start, sum,
&dsync_blocks);
if (unlikely(err))
goto failed;
if (NILFS_SEG_LOGEND(&ssi)) {
err = recover_dsync_blocks(
sbi, &dsync_blocks, &nsalvaged_blocks);
if (flags & NILFS_SS_LOGEND) {
err = nilfs_recover_dsync_blocks(
nilfs, sbi, &dsync_blocks,
&nsalvaged_blocks);
if (unlikely(err))
goto failed;
state = RF_INIT_ST;
@ -627,7 +658,7 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
try_next_pseg:
if (pseg_start == ri->ri_lsegs_end)
break;
pseg_start += ssi.nblocks;
pseg_start += le32_to_cpu(sum->ss_nblocks);
if (pseg_start < seg_end)
continue;
goto feed_segment;
@ -652,8 +683,9 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
ri->ri_need_recovery = NILFS_RECOVERY_ROLLFORWARD_DONE;
}
out:
brelse(bh_sum);
dispose_recovery_list(&dsync_blocks);
nilfs_detach_writer(sbi->s_nilfs, sbi);
nilfs_detach_writer(nilfs, sbi);
return err;
confused:
@ -667,7 +699,6 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
}
static void nilfs_finish_roll_forward(struct the_nilfs *nilfs,
struct nilfs_sb_info *sbi,
struct nilfs_recovery_info *ri)
{
struct buffer_head *bh;
@ -677,7 +708,7 @@ static void nilfs_finish_roll_forward(struct the_nilfs *nilfs,
nilfs_get_segnum_of_block(nilfs, ri->ri_super_root))
return;
bh = sb_getblk(sbi->s_super, ri->ri_lsegs_start);
bh = __getblk(nilfs->ns_bdev, ri->ri_lsegs_start, nilfs->ns_blocksize);
BUG_ON(!bh);
memset(bh->b_data, 0, bh->b_size);
set_buffer_dirty(bh);
@ -690,9 +721,8 @@ static void nilfs_finish_roll_forward(struct the_nilfs *nilfs,
}
/**
* nilfs_recover_logical_segments - salvage logical segments written after
* the latest super root
* @nilfs: the_nilfs
* nilfs_salvage_orphan_logs - salvage logs written after the latest checkpoint
* @nilfs: nilfs object
* @sbi: nilfs_sb_info
* @ri: pointer to a nilfs_recovery_info struct to store search results.
*
@ -709,9 +739,9 @@ static void nilfs_finish_roll_forward(struct the_nilfs *nilfs,
*
* %-ENOMEM - Insufficient memory available.
*/
int nilfs_recover_logical_segments(struct the_nilfs *nilfs,
struct nilfs_sb_info *sbi,
struct nilfs_recovery_info *ri)
int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs,
struct nilfs_sb_info *sbi,
struct nilfs_recovery_info *ri)
{
int err;
@ -751,7 +781,7 @@ int nilfs_recover_logical_segments(struct the_nilfs *nilfs,
goto failed;
}
nilfs_finish_roll_forward(nilfs, sbi, ri);
nilfs_finish_roll_forward(nilfs, ri);
}
failed:
@ -762,7 +792,6 @@ int nilfs_recover_logical_segments(struct the_nilfs *nilfs,
/**
* nilfs_search_super_root - search the latest valid super root
* @nilfs: the_nilfs
* @sbi: nilfs_sb_info
* @ri: pointer to a nilfs_recovery_info struct to store search results.
*
* nilfs_search_super_root() looks for the latest super-root from a partial
@ -775,14 +804,19 @@ int nilfs_recover_logical_segments(struct the_nilfs *nilfs,
* %-EINVAL - No valid segment found
*
* %-EIO - I/O error
*
* %-ENOMEM - Insufficient memory available.
*/
int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
int nilfs_search_super_root(struct the_nilfs *nilfs,
struct nilfs_recovery_info *ri)
{
struct nilfs_segsum_info ssi;
struct buffer_head *bh_sum = NULL;
struct nilfs_segment_summary *sum;
sector_t pseg_start, pseg_end, sr_pseg_start = 0;
sector_t seg_start, seg_end; /* range of full segment (block number) */
sector_t b, end;
unsigned long nblocks;
unsigned int flags;
u64 seg_seq;
__u64 segnum, nextnum = 0;
__u64 cno;
@ -801,17 +835,24 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
/* Read ahead segment */
b = seg_start;
while (b <= seg_end)
sb_breadahead(sbi->s_super, b++);
__breadahead(nilfs->ns_bdev, b++, nilfs->ns_blocksize);
for (;;) {
/* Load segment summary */
ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi);
brelse(bh_sum);
ret = NILFS_SEG_FAIL_IO;
bh_sum = nilfs_read_log_header(nilfs, pseg_start, &sum);
if (!bh_sum)
goto failed;
ret = nilfs_validate_log(nilfs, seg_seq, bh_sum, sum);
if (ret) {
if (ret == NILFS_SEG_FAIL_IO)
goto failed;
goto strayed;
}
pseg_end = pseg_start + ssi.nblocks - 1;
nblocks = le32_to_cpu(sum->ss_nblocks);
pseg_end = pseg_start + nblocks - 1;
if (unlikely(pseg_end > seg_end)) {
ret = NILFS_SEG_FAIL_CONSISTENCY;
goto strayed;
@ -821,11 +862,13 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
ri->ri_pseg_start = pseg_start;
ri->ri_seq = seg_seq;
ri->ri_segnum = segnum;
nextnum = nilfs_get_segnum_of_block(nilfs, ssi.next);
nextnum = nilfs_get_segnum_of_block(nilfs,
le64_to_cpu(sum->ss_next));
ri->ri_nextnum = nextnum;
empty_seg = 0;
if (!NILFS_SEG_HAS_SR(&ssi) && !scan_newer) {
flags = le16_to_cpu(sum->ss_flags);
if (!(flags & NILFS_SS_SR) && !scan_newer) {
/* This will never happen because a superblock
(last_segment) always points to a pseg
having a super root. */
@ -836,14 +879,15 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
if (pseg_start == seg_start) {
nilfs_get_segment_range(nilfs, nextnum, &b, &end);
while (b <= end)
sb_breadahead(sbi->s_super, b++);
__breadahead(nilfs->ns_bdev, b++,
nilfs->ns_blocksize);
}
if (!NILFS_SEG_HAS_SR(&ssi)) {
if (!ri->ri_lsegs_start && NILFS_SEG_LOGBGN(&ssi)) {
if (!(flags & NILFS_SS_SR)) {
if (!ri->ri_lsegs_start && (flags & NILFS_SS_LOGBGN)) {
ri->ri_lsegs_start = pseg_start;
ri->ri_lsegs_start_seq = seg_seq;
}
if (NILFS_SEG_LOGEND(&ssi))
if (flags & NILFS_SS_LOGEND)
ri->ri_lsegs_end = pseg_start;
goto try_next_pseg;
}
@ -854,12 +898,12 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
ri->ri_lsegs_start = ri->ri_lsegs_end = 0;
nilfs_dispose_segment_list(&segments);
nilfs->ns_pseg_offset = (sr_pseg_start = pseg_start)
+ ssi.nblocks - seg_start;
sr_pseg_start = pseg_start;
nilfs->ns_pseg_offset = pseg_start + nblocks - seg_start;
nilfs->ns_seg_seq = seg_seq;
nilfs->ns_segnum = segnum;
nilfs->ns_cno = cno; /* nilfs->ns_cno = ri->ri_cno + 1 */
nilfs->ns_ctime = ssi.ctime;
nilfs->ns_ctime = le64_to_cpu(sum->ss_create);
nilfs->ns_nextnum = nextnum;
if (scan_newer)
@ -870,15 +914,9 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
scan_newer = 1;
}
/* reset region for roll-forward */
pseg_start += ssi.nblocks;
if (pseg_start < seg_end)
continue;
goto feed_segment;
try_next_pseg:
/* Standing on a course, or met an inconsistent state */
pseg_start += ssi.nblocks;
pseg_start += nblocks;
if (pseg_start < seg_end)
continue;
goto feed_segment;
@ -909,6 +947,7 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
super_root_found:
/* Updating pointers relating to the latest checkpoint */
brelse(bh_sum);
list_splice_tail(&segments, &ri->ri_used_segments);
nilfs->ns_last_pseg = sr_pseg_start;
nilfs->ns_last_seq = nilfs->ns_seg_seq;
@ -916,6 +955,7 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
return 0;
failed:
brelse(bh_sum);
nilfs_dispose_segment_list(&segments);
return (ret < 0) ? ret : nilfs_warn_segment_error(ret);
}

24
fs/nilfs2/segbuf.h
View File

@ -54,17 +54,6 @@ struct nilfs_segsum_info {
sector_t next;
};
/* macro for the flags */
#define NILFS_SEG_HAS_SR(sum) ((sum)->flags & NILFS_SS_SR)
#define NILFS_SEG_LOGBGN(sum) ((sum)->flags & NILFS_SS_LOGBGN)
#define NILFS_SEG_LOGEND(sum) ((sum)->flags & NILFS_SS_LOGEND)
#define NILFS_SEG_DSYNC(sum) ((sum)->flags & NILFS_SS_SYNDT)
#define NILFS_SEG_SIMPLEX(sum) \
(((sum)->flags & (NILFS_SS_LOGBGN | NILFS_SS_LOGEND)) == \
(NILFS_SS_LOGBGN | NILFS_SS_LOGEND))
#define NILFS_SEG_EMPTY(sum) ((sum)->nblocks == (sum)->nsumblk)
/**
* struct nilfs_segment_buffer - Segment buffer
* @sb_super: back pointer to a superblock struct
@ -141,6 +130,19 @@ int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *,
struct buffer_head **);
void nilfs_segbuf_fill_in_segsum(struct nilfs_segment_buffer *);
static inline int nilfs_segbuf_simplex(struct nilfs_segment_buffer *segbuf)
{
unsigned int flags = segbuf->sb_sum.flags;
return (flags & (NILFS_SS_LOGBGN | NILFS_SS_LOGEND)) ==
(NILFS_SS_LOGBGN | NILFS_SS_LOGEND);
}
static inline int nilfs_segbuf_empty(struct nilfs_segment_buffer *segbuf)
{
return segbuf->sb_sum.nblocks == segbuf->sb_sum.nsumblk;
}
static inline void
nilfs_segbuf_add_segsum_buffer(struct nilfs_segment_buffer *segbuf,
struct buffer_head *bh)

19
fs/nilfs2/segment.c
View File

@ -1914,12 +1914,12 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
}
}
if (!NILFS_SEG_SIMPLEX(&segbuf->sb_sum)) {
if (NILFS_SEG_LOGBGN(&segbuf->sb_sum)) {
if (!nilfs_segbuf_simplex(segbuf)) {
if (segbuf->sb_sum.flags & NILFS_SS_LOGBGN) {
set_bit(NILFS_SC_UNCLOSED, &sci->sc_flags);
sci->sc_lseg_stime = jiffies;
}
if (NILFS_SEG_LOGEND(&segbuf->sb_sum))
if (segbuf->sb_sum.flags & NILFS_SS_LOGEND)
clear_bit(NILFS_SC_UNCLOSED, &sci->sc_flags);
}
}
@ -1951,7 +1951,6 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
if (update_sr) {
nilfs_set_last_segment(nilfs, segbuf->sb_pseg_start,
segbuf->sb_sum.seg_seq, nilfs->ns_cno++);
set_nilfs_sb_dirty(nilfs);
clear_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags);
clear_bit(NILFS_SC_DIRTY, &sci->sc_flags);
@ -2082,7 +2081,7 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode)
/* Avoid empty segment */
if (sci->sc_stage.scnt == NILFS_ST_DONE &&
NILFS_SEG_EMPTY(&sci->sc_curseg->sb_sum)) {
nilfs_segbuf_empty(sci->sc_curseg)) {
nilfs_segctor_abort_construction(sci, nilfs, 1);
goto out;
}
@ -2408,6 +2407,7 @@ static int nilfs_segctor_construct(struct nilfs_sc_info *sci, int mode)
{
struct nilfs_sb_info *sbi = sci->sc_sbi;
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_super_block **sbp;
int err = 0;
nilfs_segctor_accept(sci);
@ -2423,8 +2423,13 @@ static int nilfs_segctor_construct(struct nilfs_sc_info *sci, int mode)
if (test_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags) &&
nilfs_discontinued(nilfs)) {
down_write(&nilfs->ns_sem);
err = nilfs_commit_super(
sbi, nilfs_altsb_need_update(nilfs));
err = -EIO;
sbp = nilfs_prepare_super(sbi,
nilfs_sb_will_flip(nilfs));
if (likely(sbp)) {
nilfs_set_log_cursor(sbp[0], nilfs);
err = nilfs_commit_super(sbi, NILFS_SB_COMMIT);
}
up_write(&nilfs->ns_sem);
}
}

10
fs/nilfs2/segment.h
View File

@ -234,13 +234,13 @@ extern int nilfs_attach_segment_constructor(struct nilfs_sb_info *);
extern void nilfs_detach_segment_constructor(struct nilfs_sb_info *);
/* recovery.c */
extern int nilfs_read_super_root_block(struct super_block *, sector_t,
extern int nilfs_read_super_root_block(struct the_nilfs *, sector_t,
struct buffer_head **, int);
extern int nilfs_search_super_root(struct the_nilfs *, struct nilfs_sb_info *,
extern int nilfs_search_super_root(struct the_nilfs *,
struct nilfs_recovery_info *);
extern int nilfs_recover_logical_segments(struct the_nilfs *,
struct nilfs_sb_info *,
struct nilfs_recovery_info *);
extern int nilfs_salvage_orphan_logs(struct the_nilfs *,
struct nilfs_sb_info *,
struct nilfs_recovery_info *);
extern void nilfs_dispose_segment_list(struct list_head *);
#endif /* _NILFS_SEGMENT_H */

331
fs/nilfs2/super.c
View File

@ -55,6 +55,8 @@
#include "nilfs.h"
#include "mdt.h"
#include "alloc.h"
#include "btree.h"
#include "btnode.h"
#include "page.h"
#include "cpfile.h"
#include "ifile.h"
@ -74,6 +76,25 @@ struct kmem_cache *nilfs_btree_path_cache;
static int nilfs_remount(struct super_block *sb, int *flags, char *data);
static void nilfs_set_error(struct nilfs_sb_info *sbi)
{
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_super_block **sbp;
down_write(&nilfs->ns_sem);
if (!(nilfs->ns_mount_state & NILFS_ERROR_FS)) {
nilfs->ns_mount_state |= NILFS_ERROR_FS;
sbp = nilfs_prepare_super(sbi, 0);
if (likely(sbp)) {
sbp[0]->s_state |= cpu_to_le16(NILFS_ERROR_FS);
if (sbp[1])
sbp[1]->s_state |= cpu_to_le16(NILFS_ERROR_FS);
nilfs_commit_super(sbi, NILFS_SB_COMMIT_ALL);
}
}
up_write(&nilfs->ns_sem);
}
/**
* nilfs_error() - report failure condition on a filesystem
*
@ -99,16 +120,7 @@ void nilfs_error(struct super_block *sb, const char *function,
va_end(args);
if (!(sb->s_flags & MS_RDONLY)) {
struct the_nilfs *nilfs = sbi->s_nilfs;
down_write(&nilfs->ns_sem);
if (!(nilfs->ns_mount_state & NILFS_ERROR_FS)) {
nilfs->ns_mount_state |= NILFS_ERROR_FS;
nilfs->ns_sbp[0]->s_state |=
cpu_to_le16(NILFS_ERROR_FS);
nilfs_commit_super(sbi, 1);
}
up_write(&nilfs->ns_sem);
nilfs_set_error(sbi);
if (nilfs_test_opt(sbi, ERRORS_RO)) {
printk(KERN_CRIT "Remounting filesystem read-only\n");
@ -176,7 +188,7 @@ static void nilfs_clear_inode(struct inode *inode)
nilfs_btnode_cache_clear(&ii->i_btnode_cache);
}
static int nilfs_sync_super(struct nilfs_sb_info *sbi, int dupsb)
static int nilfs_sync_super(struct nilfs_sb_info *sbi, int flag)
{
struct the_nilfs *nilfs = sbi->s_nilfs;
int err;
@ -202,12 +214,20 @@ static int nilfs_sync_super(struct nilfs_sb_info *sbi, int dupsb)
printk(KERN_ERR
"NILFS: unable to write superblock (err=%d)\n", err);
if (err == -EIO && nilfs->ns_sbh[1]) {
/*
* sbp[0] points to newer log than sbp[1],
* so copy sbp[0] to sbp[1] to take over sbp[0].
*/
memcpy(nilfs->ns_sbp[1], nilfs->ns_sbp[0],
nilfs->ns_sbsize);
nilfs_fall_back_super_block(nilfs);
goto retry;
}
} else {
struct nilfs_super_block *sbp = nilfs->ns_sbp[0];
nilfs->ns_sbwcount++;
/*
* The latest segment becomes trailable from the position
* written in superblock.
@ -216,66 +236,122 @@ static int nilfs_sync_super(struct nilfs_sb_info *sbi, int dupsb)
/* update GC protection for recent segments */
if (nilfs->ns_sbh[1]) {
sbp = NULL;
if (dupsb) {
if (flag == NILFS_SB_COMMIT_ALL) {
set_buffer_dirty(nilfs->ns_sbh[1]);
if (!sync_dirty_buffer(nilfs->ns_sbh[1]))
sbp = nilfs->ns_sbp[1];
if (sync_dirty_buffer(nilfs->ns_sbh[1]) < 0)
goto out;
}
if (le64_to_cpu(nilfs->ns_sbp[1]->s_last_cno) <
le64_to_cpu(nilfs->ns_sbp[0]->s_last_cno))
sbp = nilfs->ns_sbp[1];
}
if (sbp) {
spin_lock(&nilfs->ns_last_segment_lock);
nilfs->ns_prot_seq = le64_to_cpu(sbp->s_last_seq);
spin_unlock(&nilfs->ns_last_segment_lock);
}
}
spin_lock(&nilfs->ns_last_segment_lock);
nilfs->ns_prot_seq = le64_to_cpu(sbp->s_last_seq);
spin_unlock(&nilfs->ns_last_segment_lock);
}
out:
return err;
}
int nilfs_commit_super(struct nilfs_sb_info *sbi, int dupsb)
void nilfs_set_log_cursor(struct nilfs_super_block *sbp,
struct the_nilfs *nilfs)
{
sector_t nfreeblocks;
/* nilfs->ns_sem must be locked by the caller. */
nilfs_count_free_blocks(nilfs, &nfreeblocks);
sbp->s_free_blocks_count = cpu_to_le64(nfreeblocks);
spin_lock(&nilfs->ns_last_segment_lock);
sbp->s_last_seq = cpu_to_le64(nilfs->ns_last_seq);
sbp->s_last_pseg = cpu_to_le64(nilfs->ns_last_pseg);
sbp->s_last_cno = cpu_to_le64(nilfs->ns_last_cno);
spin_unlock(&nilfs->ns_last_segment_lock);
}
struct nilfs_super_block **nilfs_prepare_super(struct nilfs_sb_info *sbi,
int flip)
{
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_super_block **sbp = nilfs->ns_sbp;
sector_t nfreeblocks;
time_t t;
int err;
/* nilfs->sem must be locked by the caller. */
/* nilfs->ns_sem must be locked by the caller. */
if (sbp[0]->s_magic != cpu_to_le16(NILFS_SUPER_MAGIC)) {
if (sbp[1] && sbp[1]->s_magic == cpu_to_le16(NILFS_SUPER_MAGIC))
nilfs_swap_super_block(nilfs);
else {
if (sbp[1] &&
sbp[1]->s_magic == cpu_to_le16(NILFS_SUPER_MAGIC)) {
memcpy(sbp[0], sbp[1], nilfs->ns_sbsize);
} else {
printk(KERN_CRIT "NILFS: superblock broke on dev %s\n",
sbi->s_super->s_id);
return -EIO;
return NULL;
}
} else if (sbp[1] &&
sbp[1]->s_magic != cpu_to_le16(NILFS_SUPER_MAGIC)) {
memcpy(sbp[1], sbp[0], nilfs->ns_sbsize);
}
err = nilfs_count_free_blocks(nilfs, &nfreeblocks);
if (unlikely(err)) {
printk(KERN_ERR "NILFS: failed to count free blocks\n");
return err;
}
spin_lock(&nilfs->ns_last_segment_lock);
sbp[0]->s_last_seq = cpu_to_le64(nilfs->ns_last_seq);
sbp[0]->s_last_pseg = cpu_to_le64(nilfs->ns_last_pseg);
sbp[0]->s_last_cno = cpu_to_le64(nilfs->ns_last_cno);
spin_unlock(&nilfs->ns_last_segment_lock);
if (flip && sbp[1])
nilfs_swap_super_block(nilfs);
return sbp;
}
int nilfs_commit_super(struct nilfs_sb_info *sbi, int flag)
{
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_super_block **sbp = nilfs->ns_sbp;
time_t t;
/* nilfs->ns_sem must be locked by the caller. */
t = get_seconds();
nilfs->ns_sbwtime[0] = t;
sbp[0]->s_free_blocks_count = cpu_to_le64(nfreeblocks);
nilfs->ns_sbwtime = t;
sbp[0]->s_wtime = cpu_to_le64(t);
sbp[0]->s_sum = 0;
sbp[0]->s_sum = cpu_to_le32(crc32_le(nilfs->ns_crc_seed,
(unsigned char *)sbp[0],
nilfs->ns_sbsize));
if (dupsb && sbp[1]) {
memcpy(sbp[1], sbp[0], nilfs->ns_sbsize);
nilfs->ns_sbwtime[1] = t;
if (flag == NILFS_SB_COMMIT_ALL && sbp[1]) {
sbp[1]->s_wtime = sbp[0]->s_wtime;
sbp[1]->s_sum = 0;
sbp[1]->s_sum = cpu_to_le32(crc32_le(nilfs->ns_crc_seed,
(unsigned char *)sbp[1],
nilfs->ns_sbsize));
}
clear_nilfs_sb_dirty(nilfs);
return nilfs_sync_super(sbi, dupsb);
return nilfs_sync_super(sbi, flag);
}
/**
* nilfs_cleanup_super() - write filesystem state for cleanup
* @sbi: nilfs_sb_info to be unmounted or degraded to read-only
*
* This function restores state flags in the on-disk super block.
* This will set "clean" flag (i.e. NILFS_VALID_FS) unless the
* filesystem was not clean previously.
*/
int nilfs_cleanup_super(struct nilfs_sb_info *sbi)
{
struct nilfs_super_block **sbp;
int flag = NILFS_SB_COMMIT;
int ret = -EIO;
sbp = nilfs_prepare_super(sbi, 0);
if (sbp) {
sbp[0]->s_state = cpu_to_le16(sbi->s_nilfs->ns_mount_state);
nilfs_set_log_cursor(sbp[0], sbi->s_nilfs);
if (sbp[1] && sbp[0]->s_last_cno == sbp[1]->s_last_cno) {
/*
* make the "clean" flag also to the opposite
* super block if both super blocks point to
* the same checkpoint.
*/
sbp[1]->s_state = sbp[0]->s_state;
flag = NILFS_SB_COMMIT_ALL;
}
ret = nilfs_commit_super(sbi, flag);
}
return ret;
}
static void nilfs_put_super(struct super_block *sb)
@ -289,8 +365,7 @@ static void nilfs_put_super(struct super_block *sb)
if (!(sb->s_flags & MS_RDONLY)) {
down_write(&nilfs->ns_sem);
nilfs->ns_sbp[0]->s_state = cpu_to_le16(nilfs->ns_mount_state);
nilfs_commit_super(sbi, 1);
nilfs_cleanup_super(sbi);
up_write(&nilfs->ns_sem);
}
down_write(&nilfs->ns_super_sem);
@ -311,6 +386,7 @@ static int nilfs_sync_fs(struct super_block *sb, int wait)
{
struct nilfs_sb_info *sbi = NILFS_SB(sb);
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_super_block **sbp;
int err = 0;
/* This function is called when super block should be written back */
@ -318,8 +394,13 @@ static int nilfs_sync_fs(struct super_block *sb, int wait)
err = nilfs_construct_segment(sb);
down_write(&nilfs->ns_sem);
if (nilfs_sb_dirty(nilfs))
nilfs_commit_super(sbi, 1);
if (nilfs_sb_dirty(nilfs)) {
sbp = nilfs_prepare_super(sbi, nilfs_sb_will_flip(nilfs));
if (likely(sbp)) {
nilfs_set_log_cursor(sbp[0], nilfs);
nilfs_commit_super(sbi, NILFS_SB_COMMIT);
}
}
up_write(&nilfs->ns_sem);
return err;
@ -442,20 +523,20 @@ static int nilfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
struct nilfs_sb_info *sbi = NILFS_SB(sb);
if (!nilfs_test_opt(sbi, BARRIER))
seq_printf(seq, ",nobarrier");
seq_puts(seq, ",nobarrier");
if (nilfs_test_opt(sbi, SNAPSHOT))
seq_printf(seq, ",cp=%llu",
(unsigned long long int)sbi->s_snapshot_cno);
if (nilfs_test_opt(sbi, ERRORS_PANIC))
seq_printf(seq, ",errors=panic");
seq_puts(seq, ",errors=panic");
if (nilfs_test_opt(sbi, ERRORS_CONT))
seq_printf(seq, ",errors=continue");
seq_puts(seq, ",errors=continue");
if (nilfs_test_opt(sbi, STRICT_ORDER))
seq_printf(seq, ",order=strict");
seq_puts(seq, ",order=strict");
if (nilfs_test_opt(sbi, NORECOVERY))
seq_printf(seq, ",norecovery");
seq_puts(seq, ",norecovery");
if (nilfs_test_opt(sbi, DISCARD))
seq_printf(seq, ",discard");
seq_puts(seq, ",discard");
return 0;
}
@ -524,23 +605,25 @@ static const struct export_operations nilfs_export_ops = {
enum {
Opt_err_cont, Opt_err_panic, Opt_err_ro,
Opt_nobarrier, Opt_snapshot, Opt_order, Opt_norecovery,
Opt_discard, Opt_err,
Opt_barrier, Opt_nobarrier, Opt_snapshot, Opt_order, Opt_norecovery,
Opt_discard, Opt_nodiscard, Opt_err,
};
static match_table_t tokens = {
{Opt_err_cont, "errors=continue"},
{Opt_err_panic, "errors=panic"},
{Opt_err_ro, "errors=remount-ro"},
{Opt_barrier, "barrier"},
{Opt_nobarrier, "nobarrier"},
{Opt_snapshot, "cp=%u"},
{Opt_order, "order=%s"},
{Opt_norecovery, "norecovery"},
{Opt_discard, "discard"},
{Opt_nodiscard, "nodiscard"},
{Opt_err, NULL}
};
static int parse_options(char *options, struct super_block *sb)
static int parse_options(char *options, struct super_block *sb, int is_remount)
{
struct nilfs_sb_info *sbi = NILFS_SB(sb);
char *p;
@ -557,6 +640,9 @@ static int parse_options(char *options, struct super_block *sb)
token = match_token(p, tokens, args);
switch (token) {
case Opt_barrier:
nilfs_set_opt(sbi, BARRIER);
break;
case Opt_nobarrier:
nilfs_clear_opt(sbi, BARRIER);
break;
@ -582,8 +668,26 @@ static int parse_options(char *options, struct super_block *sb)
case Opt_snapshot:
if (match_int(&args[0], &option) || option <= 0)
return 0;
if (!(sb->s_flags & MS_RDONLY))
if (is_remount) {
if (!nilfs_test_opt(sbi, SNAPSHOT)) {
printk(KERN_ERR
"NILFS: cannot change regular "
"mount to snapshot.\n");
return 0;
} else if (option != sbi->s_snapshot_cno) {
printk(KERN_ERR
"NILFS: cannot remount to a "
"different snapshot.\n");
return 0;
}
break;
}
if (!(sb->s_flags & MS_RDONLY)) {
printk(KERN_ERR "NILFS: cannot mount snapshot "
"read/write. A read-only option is "
"required.\n");
return 0;
}
sbi->s_snapshot_cno = option;
nilfs_set_opt(sbi, SNAPSHOT);
break;
@ -593,6 +697,9 @@ static int parse_options(char *options, struct super_block *sb)
case Opt_discard:
nilfs_set_opt(sbi, DISCARD);
break;
case Opt_nodiscard:
nilfs_clear_opt(sbi, DISCARD);
break;
default:
printk(KERN_ERR
"NILFS: Unrecognized mount option \"%s\"\n", p);
@ -613,11 +720,18 @@ nilfs_set_default_options(struct nilfs_sb_info *sbi,
static int nilfs_setup_super(struct nilfs_sb_info *sbi)
{
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_super_block *sbp = nilfs->ns_sbp[0];
int max_mnt_count = le16_to_cpu(sbp->s_max_mnt_count);
int mnt_count = le16_to_cpu(sbp->s_mnt_count);
struct nilfs_super_block **sbp;
int max_mnt_count;
int mnt_count;
/* nilfs->ns_sem must be locked by the caller. */
sbp = nilfs_prepare_super(sbi, 0);
if (!sbp)
return -EIO;
max_mnt_count = le16_to_cpu(sbp[0]->s_max_mnt_count);
mnt_count = le16_to_cpu(sbp[0]->s_mnt_count);
/* nilfs->sem must be locked by the caller. */
if (nilfs->ns_mount_state & NILFS_ERROR_FS) {
printk(KERN_WARNING
"NILFS warning: mounting fs with errors\n");
@ -628,12 +742,15 @@ static int nilfs_setup_super(struct nilfs_sb_info *sbi)
#endif
}
if (!max_mnt_count)
sbp->s_max_mnt_count = cpu_to_le16(NILFS_DFL_MAX_MNT_COUNT);
sbp[0]->s_max_mnt_count = cpu_to_le16(NILFS_DFL_MAX_MNT_COUNT);
sbp->s_mnt_count = cpu_to_le16(mnt_count + 1);
sbp->s_state = cpu_to_le16(le16_to_cpu(sbp->s_state) & ~NILFS_VALID_FS);
sbp->s_mtime = cpu_to_le64(get_seconds());
return nilfs_commit_super(sbi, 1);
sbp[0]->s_mnt_count = cpu_to_le16(mnt_count + 1);
sbp[0]->s_state =
cpu_to_le16(le16_to_cpu(sbp[0]->s_state) & ~NILFS_VALID_FS);
sbp[0]->s_mtime = cpu_to_le64(get_seconds());
/* synchronize sbp[1] with sbp[0] */
memcpy(sbp[1], sbp[0], nilfs->ns_sbsize);
return nilfs_commit_super(sbi, NILFS_SB_COMMIT_ALL);
}
struct nilfs_super_block *nilfs_read_super_block(struct super_block *sb,
@ -670,7 +787,31 @@ int nilfs_store_magic_and_option(struct super_block *sb,
sbi->s_interval = le32_to_cpu(sbp->s_c_interval);
sbi->s_watermark = le32_to_cpu(sbp->s_c_block_max);
return !parse_options(data, sb) ? -EINVAL : 0 ;
return !parse_options(data, sb, 0) ? -EINVAL : 0 ;
}
int nilfs_check_feature_compatibility(struct super_block *sb,
struct nilfs_super_block *sbp)
{
__u64 features;
features = le64_to_cpu(sbp->s_feature_incompat) &
~NILFS_FEATURE_INCOMPAT_SUPP;
if (features) {
printk(KERN_ERR "NILFS: couldn't mount because of unsupported "
"optional features (%llx)\n",
(unsigned long long)features);
return -EINVAL;
}
features = le64_to_cpu(sbp->s_feature_compat_ro) &
~NILFS_FEATURE_COMPAT_RO_SUPP;
if (!(sb->s_flags & MS_RDONLY) && features) {
printk(KERN_ERR "NILFS: couldn't mount RDWR because of "
"unsupported optional features (%llx)\n",
(unsigned long long)features);
return -EINVAL;
}
return 0;
}
/**
@ -819,7 +960,6 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
static int nilfs_remount(struct super_block *sb, int *flags, char *data)
{
struct nilfs_sb_info *sbi = NILFS_SB(sb);
struct nilfs_super_block *sbp;
struct the_nilfs *nilfs = sbi->s_nilfs;
unsigned long old_sb_flags;
struct nilfs_mount_options old_opts;
@ -833,32 +973,17 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
old_opts.snapshot_cno = sbi->s_snapshot_cno;
was_snapshot = nilfs_test_opt(sbi, SNAPSHOT);
if (!parse_options(data, sb)) {
if (!parse_options(data, sb, 1)) {
err = -EINVAL;
goto restore_opts;
}
sb->s_flags = (sb->s_flags & ~MS_POSIXACL);
err = -EINVAL;
if (was_snapshot) {
if (!(*flags & MS_RDONLY)) {
printk(KERN_ERR "NILFS (device %s): cannot remount "
"snapshot read/write.\n",
sb->s_id);
goto restore_opts;
} else if (sbi->s_snapshot_cno != old_opts.snapshot_cno) {
printk(KERN_ERR "NILFS (device %s): cannot "
"remount to a different snapshot.\n",
sb->s_id);
goto restore_opts;
}
} else {
if (nilfs_test_opt(sbi, SNAPSHOT)) {
printk(KERN_ERR "NILFS (device %s): cannot change "
"a regular mount to a snapshot.\n",
sb->s_id);
goto restore_opts;
}
if (was_snapshot && !(*flags & MS_RDONLY)) {
printk(KERN_ERR "NILFS (device %s): cannot remount snapshot "
"read/write.\n", sb->s_id);
goto restore_opts;
}
if (!nilfs_valid_fs(nilfs)) {
@ -880,19 +1005,29 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
* the RDONLY flag and then mark the partition as valid again.
*/
down_write(&nilfs->ns_sem);
sbp = nilfs->ns_sbp[0];
if (!(sbp->s_state & le16_to_cpu(NILFS_VALID_FS)) &&
(nilfs->ns_mount_state & NILFS_VALID_FS))
sbp->s_state = cpu_to_le16(nilfs->ns_mount_state);
sbp->s_mtime = cpu_to_le64(get_seconds());
nilfs_commit_super(sbi, 1);
nilfs_cleanup_super(sbi);
up_write(&nilfs->ns_sem);
} else {
__u64 features;
/*
* Mounting a RDONLY partition read-write, so reread and
* store the current valid flag. (It may have been changed
* by fsck since we originally mounted the partition.)
*/
down_read(&nilfs->ns_sem);
features = le64_to_cpu(nilfs->ns_sbp[0]->s_feature_compat_ro) &
~NILFS_FEATURE_COMPAT_RO_SUPP;
up_read(&nilfs->ns_sem);
if (features) {
printk(KERN_WARNING "NILFS (device %s): couldn't "
"remount RDWR because of unsupported optional "
"features (%llx)\n",
sb->s_id, (unsigned long long)features);
err = -EROFS;
goto restore_opts;
}
sb->s_flags &= ~MS_RDONLY;
err = nilfs_attach_segment_constructor(sbi);
@ -1119,7 +1254,7 @@ static void nilfs_inode_init_once(void *obj)
init_rwsem(&ii->xattr_sem);
#endif
nilfs_btnode_cache_init_once(&ii->i_btnode_cache);
ii->i_bmap = (struct nilfs_bmap *)&ii->i_bmap_union;
ii->i_bmap = &ii->i_bmap_data;
inode_init_once(&ii->vfs_inode);
}

161
fs/nilfs2/the_nilfs.c
View File

@ -38,6 +38,8 @@
static LIST_HEAD(nilfs_objects);
static DEFINE_SPINLOCK(nilfs_lock);
static int nilfs_valid_sb(struct nilfs_super_block *sbp);
void nilfs_set_last_segment(struct the_nilfs *nilfs,
sector_t start_blocknr, u64 seq, __u64 cno)
{
@ -45,6 +47,16 @@ void nilfs_set_last_segment(struct the_nilfs *nilfs,
nilfs->ns_last_pseg = start_blocknr;
nilfs->ns_last_seq = seq;
nilfs->ns_last_cno = cno;
if (!nilfs_sb_dirty(nilfs)) {
if (nilfs->ns_prev_seq == nilfs->ns_last_seq)
goto stay_cursor;
set_nilfs_sb_dirty(nilfs);
}
nilfs->ns_prev_seq = nilfs->ns_last_seq;
stay_cursor:
spin_unlock(&nilfs->ns_last_segment_lock);
}
@ -159,8 +171,7 @@ void put_nilfs(struct the_nilfs *nilfs)
kfree(nilfs);
}
static int nilfs_load_super_root(struct the_nilfs *nilfs,
struct nilfs_sb_info *sbi, sector_t sr_block)
static int nilfs_load_super_root(struct the_nilfs *nilfs, sector_t sr_block)
{
struct buffer_head *bh_sr;
struct nilfs_super_root *raw_sr;
@ -169,7 +180,7 @@ static int nilfs_load_super_root(struct the_nilfs *nilfs,
unsigned inode_size;
int err;
err = nilfs_read_super_root_block(sbi->s_super, sr_block, &bh_sr, 1);
err = nilfs_read_super_root_block(nilfs, sr_block, &bh_sr, 1);
if (unlikely(err))
return err;
@ -247,6 +258,37 @@ static void nilfs_clear_recovery_info(struct nilfs_recovery_info *ri)
nilfs_dispose_segment_list(&ri->ri_used_segments);
}
/**
* nilfs_store_log_cursor - load log cursor from a super block
* @nilfs: nilfs object
* @sbp: buffer storing super block to be read
*
* nilfs_store_log_cursor() reads the last position of the log
* containing a super root from a given super block, and initializes
* relevant information on the nilfs object preparatory for log
* scanning and recovery.
*/
static int nilfs_store_log_cursor(struct the_nilfs *nilfs,
struct nilfs_super_block *sbp)
{
int ret = 0;
nilfs->ns_last_pseg = le64_to_cpu(sbp->s_last_pseg);
nilfs->ns_last_cno = le64_to_cpu(sbp->s_last_cno);
nilfs->ns_last_seq = le64_to_cpu(sbp->s_last_seq);
nilfs->ns_prev_seq = nilfs->ns_last_seq;
nilfs->ns_seg_seq = nilfs->ns_last_seq;
nilfs->ns_segnum =
nilfs_get_segnum_of_block(nilfs, nilfs->ns_last_pseg);
nilfs->ns_cno = nilfs->ns_last_cno + 1;
if (nilfs->ns_segnum >= nilfs->ns_nsegments) {
printk(KERN_ERR "NILFS invalid last segment number.\n");
ret = -EINVAL;
}
return ret;
}
/**
* load_nilfs - load and recover the nilfs
* @nilfs: the_nilfs structure to be released
@ -285,13 +327,55 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
nilfs_init_recovery_info(&ri);
err = nilfs_search_super_root(nilfs, sbi, &ri);
err = nilfs_search_super_root(nilfs, &ri);
if (unlikely(err)) {
printk(KERN_ERR "NILFS: error searching super root.\n");
goto failed;
struct nilfs_super_block **sbp = nilfs->ns_sbp;
int blocksize;
if (err != -EINVAL)
goto scan_error;
if (!nilfs_valid_sb(sbp[1])) {
printk(KERN_WARNING
"NILFS warning: unable to fall back to spare"
"super block\n");
goto scan_error;
}
printk(KERN_INFO
"NILFS: try rollback from an earlier position\n");
/*
* restore super block with its spare and reconfigure
* relevant states of the nilfs object.
*/
memcpy(sbp[0], sbp[1], nilfs->ns_sbsize);
nilfs->ns_crc_seed = le32_to_cpu(sbp[0]->s_crc_seed);
nilfs->ns_sbwtime = le64_to_cpu(sbp[0]->s_wtime);
/* verify consistency between two super blocks */
blocksize = BLOCK_SIZE << le32_to_cpu(sbp[0]->s_log_block_size);
if (blocksize != nilfs->ns_blocksize) {
printk(KERN_WARNING
"NILFS warning: blocksize differs between "
"two super blocks (%d != %d)\n",
blocksize, nilfs->ns_blocksize);
goto scan_error;
}
err = nilfs_store_log_cursor(nilfs, sbp[0]);
if (err)
goto scan_error;
/* drop clean flag to allow roll-forward and recovery */
nilfs->ns_mount_state &= ~NILFS_VALID_FS;
valid_fs = 0;
err = nilfs_search_super_root(nilfs, &ri);
if (err)
goto scan_error;
}
err = nilfs_load_super_root(nilfs, sbi, ri.ri_super_root);
err = nilfs_load_super_root(nilfs, ri.ri_super_root);
if (unlikely(err)) {
printk(KERN_ERR "NILFS: error loading super root.\n");
goto failed;
@ -301,11 +385,23 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
goto skip_recovery;
if (s_flags & MS_RDONLY) {
__u64 features;
if (nilfs_test_opt(sbi, NORECOVERY)) {
printk(KERN_INFO "NILFS: norecovery option specified. "
"skipping roll-forward recovery\n");
goto skip_recovery;
}
features = le64_to_cpu(nilfs->ns_sbp[0]->s_feature_compat_ro) &
~NILFS_FEATURE_COMPAT_RO_SUPP;
if (features) {
printk(KERN_ERR "NILFS: couldn't proceed with "
"recovery because of unsupported optional "
"features (%llx)\n",
(unsigned long long)features);
err = -EROFS;
goto failed_unload;
}
if (really_read_only) {
printk(KERN_ERR "NILFS: write access "
"unavailable, cannot proceed.\n");
@ -320,14 +416,13 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
goto failed_unload;
}
err = nilfs_recover_logical_segments(nilfs, sbi, &ri);
err = nilfs_salvage_orphan_logs(nilfs, sbi, &ri);
if (err)
goto failed_unload;
down_write(&nilfs->ns_sem);
nilfs->ns_mount_state |= NILFS_VALID_FS;
nilfs->ns_sbp[0]->s_state = cpu_to_le16(nilfs->ns_mount_state);
err = nilfs_commit_super(sbi, 1);
nilfs->ns_mount_state |= NILFS_VALID_FS; /* set "clean" flag */
err = nilfs_cleanup_super(sbi);
up_write(&nilfs->ns_sem);
if (err) {
@ -343,6 +438,10 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
sbi->s_super->s_flags = s_flags;
return 0;
scan_error:
printk(KERN_ERR "NILFS: error searching super root.\n");
goto failed;
failed_unload:
nilfs_mdt_destroy(nilfs->ns_cpfile);
nilfs_mdt_destroy(nilfs->ns_sufile);
@ -515,8 +614,8 @@ static int nilfs_load_super_block(struct the_nilfs *nilfs,
nilfs_swap_super_block(nilfs);
}
nilfs->ns_sbwtime[0] = le64_to_cpu(sbp[0]->s_wtime);
nilfs->ns_sbwtime[1] = valid[!swp] ? le64_to_cpu(sbp[1]->s_wtime) : 0;
nilfs->ns_sbwcount = 0;
nilfs->ns_sbwtime = le64_to_cpu(sbp[0]->s_wtime);
nilfs->ns_prot_seq = le64_to_cpu(sbp[valid[1] & !swp]->s_last_seq);
*sbpp = sbp[0];
return 0;
@ -557,6 +656,10 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
if (err)
goto out;
err = nilfs_check_feature_compatibility(sb, sbp);
if (err)
goto out;
blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size);
if (sb->s_blocksize != blocksize &&
!sb_set_blocksize(sb, blocksize)) {
@ -568,7 +671,7 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
goto out;
}
blocksize = sb_min_blocksize(sb, BLOCK_SIZE);
blocksize = sb_min_blocksize(sb, NILFS_MIN_BLOCK_SIZE);
if (!blocksize) {
printk(KERN_ERR "NILFS: unable to set blocksize\n");
err = -EINVAL;
@ -582,7 +685,18 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
if (err)
goto failed_sbh;
err = nilfs_check_feature_compatibility(sb, sbp);
if (err)
goto failed_sbh;
blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size);
if (blocksize < NILFS_MIN_BLOCK_SIZE ||
blocksize > NILFS_MAX_BLOCK_SIZE) {
printk(KERN_ERR "NILFS: couldn't mount because of unsupported "
"filesystem blocksize %d\n", blocksize);
err = -EINVAL;
goto failed_sbh;
}
if (sb->s_blocksize != blocksize) {
int hw_blocksize = bdev_logical_block_size(sb->s_bdev);
@ -604,6 +718,7 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
when reloading fails. */
}
nilfs->ns_blocksize_bits = sb->s_blocksize_bits;
nilfs->ns_blocksize = blocksize;
err = nilfs_store_disk_layout(nilfs, sbp);
if (err)
@ -616,23 +731,9 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
bdi = nilfs->ns_bdev->bd_inode->i_mapping->backing_dev_info;
nilfs->ns_bdi = bdi ? : &default_backing_dev_info;
/* Finding last segment */
nilfs->ns_last_pseg = le64_to_cpu(sbp->s_last_pseg);
nilfs->ns_last_cno = le64_to_cpu(sbp->s_last_cno);
nilfs->ns_last_seq = le64_to_cpu(sbp->s_last_seq);
nilfs->ns_seg_seq = nilfs->ns_last_seq;
nilfs->ns_segnum =
nilfs_get_segnum_of_block(nilfs, nilfs->ns_last_pseg);
nilfs->ns_cno = nilfs->ns_last_cno + 1;
if (nilfs->ns_segnum >= nilfs->ns_nsegments) {
printk(KERN_ERR "NILFS invalid last segment number.\n");
err = -EINVAL;
err = nilfs_store_log_cursor(nilfs, sbp);
if (err)
goto failed_sbh;
}
/* Dummy values */
nilfs->ns_free_segments_count =
nilfs->ns_nsegments - (nilfs->ns_segnum + 1);
/* Initialize gcinode cache */
err = nilfs_init_gccache(nilfs);

23
fs/nilfs2/the_nilfs.h
View File

@ -57,7 +57,8 @@ enum {
* @ns_current: back pointer to current mount
* @ns_sbh: buffer heads of on-disk super blocks
* @ns_sbp: pointers to super block data
* @ns_sbwtime: previous write time of super blocks
* @ns_sbwtime: previous write time of super block
* @ns_sbwcount: write count of super block
* @ns_sbsize: size of valid data in super block
* @ns_supers: list of nilfs super block structs
* @ns_seg_seq: segment sequence counter
@ -73,7 +74,7 @@ enum {
* @ns_last_seq: sequence value of the latest segment
* @ns_last_cno: checkpoint number of the latest segment
* @ns_prot_seq: least sequence number of segments which must not be reclaimed
* @ns_free_segments_count: counter of free segments
* @ns_prev_seq: base sequence number used to decide if advance log cursor
* @ns_segctor_sem: segment constructor semaphore
* @ns_dat: DAT file inode
* @ns_cpfile: checkpoint file inode
@ -82,6 +83,7 @@ enum {
* @ns_gc_inodes: dummy inodes to keep live blocks
* @ns_gc_inodes_h: hash list to keep dummy inode holding live blocks
* @ns_blocksize_bits: bit length of block size
* @ns_blocksize: block size
* @ns_nsegments: number of segments in filesystem
* @ns_blocks_per_segment: number of blocks per segment
* @ns_r_segments_percentage: reserved segments percentage
@ -119,7 +121,8 @@ struct the_nilfs {
*/
struct buffer_head *ns_sbh[2];
struct nilfs_super_block *ns_sbp[2];
time_t ns_sbwtime[2];
time_t ns_sbwtime;
unsigned ns_sbwcount;
unsigned ns_sbsize;
unsigned ns_mount_state;
@ -149,7 +152,7 @@ struct the_nilfs {
u64 ns_last_seq;
__u64 ns_last_cno;
u64 ns_prot_seq;
unsigned long ns_free_segments_count;
u64 ns_prev_seq;
struct rw_semaphore ns_segctor_sem;
@ -168,6 +171,7 @@ struct the_nilfs {
/* Disk layout information (static) */
unsigned int ns_blocksize_bits;
unsigned int ns_blocksize;
unsigned long ns_nsegments;
unsigned long ns_blocks_per_segment;
unsigned long ns_r_segments_percentage;
@ -203,20 +207,17 @@ THE_NILFS_FNS(SB_DIRTY, sb_dirty)
/* Minimum interval of periodical update of superblocks (in seconds) */
#define NILFS_SB_FREQ 10
#define NILFS_ALTSB_FREQ 60 /* spare superblock */
static inline int nilfs_sb_need_update(struct the_nilfs *nilfs)
{
u64 t = get_seconds();
return t < nilfs->ns_sbwtime[0] ||
t > nilfs->ns_sbwtime[0] + NILFS_SB_FREQ;
return t < nilfs->ns_sbwtime || t > nilfs->ns_sbwtime + NILFS_SB_FREQ;
}
static inline int nilfs_altsb_need_update(struct the_nilfs *nilfs)
static inline int nilfs_sb_will_flip(struct the_nilfs *nilfs)
{
u64 t = get_seconds();
struct nilfs_super_block **sbp = nilfs->ns_sbp;
return sbp[1] && t > nilfs->ns_sbwtime[1] + NILFS_ALTSB_FREQ;
int flip_bits = nilfs->ns_sbwcount & 0x0FL;
return (flip_bits != 0x08 && flip_bits != 0x0F);
}
void nilfs_set_last_segment(struct the_nilfs *, sector_t, u64, __u64);

65
include/linux/nilfs2_fs.h
View File

@ -160,7 +160,7 @@ struct nilfs_super_root {
* struct nilfs_super_block - structure of super block on disk
*/
struct nilfs_super_block {
__le32 s_rev_level; /* Revision level */
/*00*/ __le32 s_rev_level; /* Revision level */
__le16 s_minor_rev_level; /* minor revision level */
__le16 s_magic; /* Magic signature */
@ -169,50 +169,53 @@ struct nilfs_super_block {
is excluded. */
__le16 s_flags; /* flags */
__le32 s_crc_seed; /* Seed value of CRC calculation */
__le32 s_sum; /* Check sum of super block */
/*10*/ __le32 s_sum; /* Check sum of super block */
__le32 s_log_block_size; /* Block size represented as follows
blocksize =
1 << (s_log_block_size + 10) */
__le64 s_nsegments; /* Number of segments in filesystem */
__le64 s_dev_size; /* block device size in bytes */
/*20*/ __le64 s_dev_size; /* block device size in bytes */
__le64 s_first_data_block; /* 1st seg disk block number */
__le32 s_blocks_per_segment; /* number of blocks per full segment */
/*30*/ __le32 s_blocks_per_segment; /* number of blocks per full segment */
__le32 s_r_segments_percentage; /* Reserved segments percentage */
__le64 s_last_cno; /* Last checkpoint number */
__le64 s_last_pseg; /* disk block addr pseg written last */
/*40*/ __le64 s_last_pseg; /* disk block addr pseg written last */
__le64 s_last_seq; /* seq. number of seg written last */
__le64 s_free_blocks_count; /* Free blocks count */
/*50*/ __le64 s_free_blocks_count; /* Free blocks count */
__le64 s_ctime; /* Creation time (execution time of
newfs) */
__le64 s_mtime; /* Mount time */
/*60*/ __le64 s_mtime; /* Mount time */
__le64 s_wtime; /* Write time */
__le16 s_mnt_count; /* Mount count */
/*70*/ __le16 s_mnt_count; /* Mount count */
__le16 s_max_mnt_count; /* Maximal mount count */
__le16 s_state; /* File system state */
__le16 s_errors; /* Behaviour when detecting errors */
__le64 s_lastcheck; /* time of last check */
__le32 s_checkinterval; /* max. time between checks */
/*80*/ __le32 s_checkinterval; /* max. time between checks */
__le32 s_creator_os; /* OS */
__le16 s_def_resuid; /* Default uid for reserved blocks */
__le16 s_def_resgid; /* Default gid for reserved blocks */
__le32 s_first_ino; /* First non-reserved inode */
__le16 s_inode_size; /* Size of an inode */
/*90*/ __le16 s_inode_size; /* Size of an inode */
__le16 s_dat_entry_size; /* Size of a dat entry */
__le16 s_checkpoint_size; /* Size of a checkpoint */
__le16 s_segment_usage_size; /* Size of a segment usage */
__u8 s_uuid[16]; /* 128-bit uuid for volume */
char s_volume_name[80]; /* volume name */
/*98*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
/*A8*/ char s_volume_name[80]; /* volume name */
__le32 s_c_interval; /* Commit interval of segment */
/*F8*/ __le32 s_c_interval; /* Commit interval of segment */
__le32 s_c_block_max; /* Threshold of data amount for
the segment construction */
__u32 s_reserved[192]; /* padding to the end of the block */
/*100*/ __le64 s_feature_compat; /* Compatible feature set */
__le64 s_feature_compat_ro; /* Read-only compatible feature set */
__le64 s_feature_incompat; /* Incompatible feature set */
__u32 s_reserved[186]; /* padding to the end of the block */
};
/*
@ -227,6 +230,16 @@ struct nilfs_super_block {
#define NILFS_CURRENT_REV 2 /* current major revision */
#define NILFS_MINOR_REV 0 /* minor revision */
/*
* Feature set definitions
*
* If there is a bit set in the incompatible feature set that the kernel
* doesn't know about, it should refuse to mount the filesystem.
*/
#define NILFS_FEATURE_COMPAT_SUPP 0ULL
#define NILFS_FEATURE_COMPAT_RO_SUPP 0ULL
#define NILFS_FEATURE_INCOMPAT_SUPP 0ULL
/*
* Bytes count of super_block for CRC-calculation
*/
@ -273,6 +286,12 @@ struct nilfs_super_block {
#define NILFS_NAME_LEN 255
/*
* Block size limitations
*/
#define NILFS_MIN_BLOCK_SIZE 1024
#define NILFS_MAX_BLOCK_SIZE 65536
/*
* The new version of the directory entry. Since V0 structures are
* stored in intel byte order, and the name_len field could never be
@ -313,7 +332,25 @@ enum {
#define NILFS_DIR_ROUND (NILFS_DIR_PAD - 1)
#define NILFS_DIR_REC_LEN(name_len) (((name_len) + 12 + NILFS_DIR_ROUND) & \
~NILFS_DIR_ROUND)
#define NILFS_MAX_REC_LEN ((1<<16)-1)
static inline unsigned nilfs_rec_len_from_disk(__le16 dlen)
{
unsigned len = le16_to_cpu(dlen);
if (len == NILFS_MAX_REC_LEN)
return 1 << 16;
return len;
}
static inline __le16 nilfs_rec_len_to_disk(unsigned len)
{
if (len == (1 << 16))
return cpu_to_le16(NILFS_MAX_REC_LEN);
else if (len > (1 << 16))
BUG();
return cpu_to_le16(len);
}
/**
* struct nilfs_finfo - file information