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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

Browse Source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (87 commits)
  nilfs2: get rid of bd_mount_sem use from nilfs
  nilfs2: correct exclusion control in nilfs_remount function
  nilfs2: simplify remaining sget() use
  nilfs2: get rid of sget use for checking if current mount is present
  nilfs2: get rid of sget use for acquiring nilfs object
  nilfs2: remove meaningless EBUSY case from nilfs_get_sb function
  remove the call to ->write_super in __sync_filesystem
  nilfs2: call nilfs2_write_super from nilfs2_sync_fs
  jffs2: call jffs2_write_super from jffs2_sync_fs
  ufs: add ->sync_fs
  sysv: add ->sync_fs
  hfsplus: add ->sync_fs
  hfs: add ->sync_fs
  fat: add ->sync_fs
  ext2: add ->sync_fs
  exofs: add ->sync_fs
  bfs: add ->sync_fs
  affs: add ->sync_fs
  sanitize ->fsync() for affs
  repair bfs_write_inode(), switch bfs to simple_fsync()
  ...
This commit is contained in:
Linus Torvalds 2009-06-11 20:05:37 -07:00
commit 4b4f1d0178
147 changed files with 1716 additions and 1843 deletions
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3
arch/alpha/kernel/osf_sys.c
View File

@ -371,8 +371,6 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, char __user *, path,
int retval = -EINVAL;
char *name;
lock_kernel();
name = getname(path);
retval = PTR_ERR(name);
if (IS_ERR(name))
@ -392,7 +390,6 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, char __user *, path,
}
putname(name);
out:
unlock_kernel();
return retval;
}

5
drivers/ieee1394/dv1394.c
View File

@ -1789,12 +1789,13 @@ static int dv1394_open(struct inode *inode, struct file *file)
} else {
/* look up the card by ID */
unsigned long flags;
int idx = ieee1394_file_to_instance(file);
spin_lock_irqsave(&dv1394_cards_lock, flags);
if (!list_empty(&dv1394_cards)) {
struct video_card *p;
list_for_each_entry(p, &dv1394_cards, list) {
if ((p->id) == ieee1394_file_to_instance(file)) {
if ((p->id) == idx) {
video = p;
break;
}
@ -1803,7 +1804,7 @@ static int dv1394_open(struct inode *inode, struct file *file)
spin_unlock_irqrestore(&dv1394_cards_lock, flags);
if (!video) {
debug_printk("dv1394: OHCI card %d not found", ieee1394_file_to_instance(file));
debug_printk("dv1394: OHCI card %d not found", idx);
return -ENODEV;
}

6
drivers/ieee1394/ieee1394_core.h
View File

@ -5,6 +5,7 @@
#include <linux/fs.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/cdev.h>
#include <asm/atomic.h>
#include "hosts.h"
@ -155,7 +156,10 @@ void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
*/
static inline unsigned char ieee1394_file_to_instance(struct file *file)
{
return file->f_path.dentry->d_inode->i_cindex;
int idx = cdev_index(file->f_path.dentry->d_inode);
if (idx < 0)
idx = 0;
return idx;
}
extern int hpsb_disable_irm;

5
drivers/usb/core/inode.c
View File

@ -39,6 +39,7 @@
#include <linux/parser.h>
#include <linux/notifier.h>
#include <linux/seq_file.h>
#include <linux/smp_lock.h>
#include <asm/byteorder.h>
#include "usb.h"
#include "hcd.h"
@ -265,9 +266,13 @@ static int remount(struct super_block *sb, int *flags, char *data)
return -EINVAL;
}
lock_kernel();
if (usbfs_mount && usbfs_mount->mnt_sb)
update_sb(usbfs_mount->mnt_sb);
unlock_kernel();
return 0;
}

4
fs/adfs/adfs.h
View File

@ -53,6 +53,7 @@ struct adfs_dir_ops {
int (*update)(struct adfs_dir *dir, struct object_info *obj);
int (*create)(struct adfs_dir *dir, struct object_info *obj);
int (*remove)(struct adfs_dir *dir, struct object_info *obj);
int (*sync)(struct adfs_dir *dir);
void (*free)(struct adfs_dir *dir);
};
@ -90,7 +91,8 @@ extern const struct dentry_operations adfs_dentry_operations;
extern struct adfs_dir_ops adfs_f_dir_ops;
extern struct adfs_dir_ops adfs_fplus_dir_ops;
extern int adfs_dir_update(struct super_block *sb, struct object_info *obj);
extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
int wait);
/* file.c */
extern const struct inode_operations adfs_file_inode_operations;

10
fs/adfs/dir.c
View File

@ -83,7 +83,7 @@ adfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
}
int
adfs_dir_update(struct super_block *sb, struct object_info *obj)
adfs_dir_update(struct super_block *sb, struct object_info *obj, int wait)
{
int ret = -EINVAL;
#ifdef CONFIG_ADFS_FS_RW
@ -106,6 +106,12 @@ adfs_dir_update(struct super_block *sb, struct object_info *obj)
ret = ops->update(&dir, obj);
write_unlock(&adfs_dir_lock);
if (wait) {
int err = ops->sync(&dir);
if (!ret)
ret = err;
}
ops->free(&dir);
out:
#endif
@ -199,7 +205,7 @@ const struct file_operations adfs_dir_operations = {
.read = generic_read_dir,
.llseek = generic_file_llseek,
.readdir = adfs_readdir,
.fsync = file_fsync,
.fsync = simple_fsync,
};
static int

17
fs/adfs/dir_f.c
View File

@ -437,6 +437,22 @@ adfs_f_update(struct adfs_dir *dir, struct object_info *obj)
#endif
}
static int
adfs_f_sync(struct adfs_dir *dir)
{
int err = 0;
int i;
for (i = dir->nr_buffers - 1; i >= 0; i--) {
struct buffer_head *bh = dir->bh[i];
sync_dirty_buffer(bh);
if (buffer_req(bh) && !buffer_uptodate(bh))
err = -EIO;
}
return err;
}
static void
adfs_f_free(struct adfs_dir *dir)
{
@ -456,5 +472,6 @@ struct adfs_dir_ops adfs_f_dir_ops = {
.setpos = adfs_f_setpos,
.getnext = adfs_f_getnext,
.update = adfs_f_update,
.sync = adfs_f_sync,
.free = adfs_f_free
};

17
fs/adfs/dir_fplus.c
View File

@ -161,6 +161,22 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
return ret;
}
static int
adfs_fplus_sync(struct adfs_dir *dir)
{
int err = 0;
int i;
for (i = dir->nr_buffers - 1; i >= 0; i--) {
struct buffer_head *bh = dir->bh[i];
sync_dirty_buffer(bh);
if (buffer_req(bh) && !buffer_uptodate(bh))
err = -EIO;
}
return err;
}
static void
adfs_fplus_free(struct adfs_dir *dir)
{
@ -175,5 +191,6 @@ struct adfs_dir_ops adfs_fplus_dir_ops = {
.read = adfs_fplus_read,
.setpos = adfs_fplus_setpos,
.getnext = adfs_fplus_getnext,
.sync = adfs_fplus_sync,
.free = adfs_fplus_free
};

2
fs/adfs/file.c
View File

@ -30,7 +30,7 @@ const struct file_operations adfs_file_operations = {
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.mmap = generic_file_mmap,
.fsync = file_fsync,
.fsync = simple_fsync,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.splice_read = generic_file_splice_read,

4
fs/adfs/inode.c
View File

@ -376,7 +376,7 @@ adfs_notify_change(struct dentry *dentry, struct iattr *attr)
* The adfs-specific inode data has already been updated by
* adfs_notify_change()
*/
int adfs_write_inode(struct inode *inode, int unused)
int adfs_write_inode(struct inode *inode, int wait)
{
struct super_block *sb = inode->i_sb;
struct object_info obj;
@ -391,7 +391,7 @@ int adfs_write_inode(struct inode *inode, int unused)
obj.attr = ADFS_I(inode)->attr;
obj.size = inode->i_size;
ret = adfs_dir_update(sb, &obj);
ret = adfs_dir_update(sb, &obj, wait);
unlock_kernel();
return ret;
}

2
fs/adfs/map.c
View File

@ -62,7 +62,7 @@ static DEFINE_RWLOCK(adfs_map_lock);
#define GET_FRAG_ID(_map,_start,_idmask) \
({ \
unsigned char *_m = _map + (_start >> 3); \
u32 _frag = get_unaligned((u32 *)_m); \
u32 _frag = get_unaligned_le32(_m); \
_frag >>= (_start & 7); \
_frag & _idmask; \
})

4
fs/adfs/super.c
View File

@ -132,11 +132,15 @@ static void adfs_put_super(struct super_block *sb)
int i;
struct adfs_sb_info *asb = ADFS_SB(sb);
lock_kernel();
for (i = 0; i < asb->s_map_size; i++)
brelse(asb->s_map[i].dm_bh);
kfree(asb->s_map);
kfree(asb);
sb->s_fs_info = NULL;
unlock_kernel();
}
static int adfs_show_options(struct seq_file *seq, struct vfsmount *mnt)

1
fs/affs/affs.h
View File

@ -182,6 +182,7 @@ extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dent
void affs_free_prealloc(struct inode *inode);
extern void affs_truncate(struct inode *);
int affs_file_fsync(struct file *, struct dentry *, int);
/* dir.c */

2
fs/affs/dir.c
View File

@ -21,7 +21,7 @@ const struct file_operations affs_dir_operations = {
.read = generic_read_dir,
.llseek = generic_file_llseek,
.readdir = affs_readdir,
.fsync = file_fsync,
.fsync = affs_file_fsync,
};
/*

14
fs/affs/file.c
View File

@ -34,7 +34,7 @@ const struct file_operations affs_file_operations = {
.mmap = generic_file_mmap,
.open = affs_file_open,
.release = affs_file_release,
.fsync = file_fsync,
.fsync = affs_file_fsync,
.splice_read = generic_file_splice_read,
};
@ -915,3 +915,15 @@ affs_truncate(struct inode *inode)
}
affs_free_prealloc(inode);
}
int affs_file_fsync(struct file *filp, struct dentry *dentry, int datasync)
{
struct inode * inode = dentry->d_inode;
int ret, err;
ret = write_inode_now(inode, 0);
err = sync_blockdev(inode->i_sb->s_bdev);
if (!ret)
ret = err;
return ret;
}

54
fs/affs/super.c
View File

@ -16,6 +16,7 @@
#include <linux/parser.h>
#include <linux/magic.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include "affs.h"
extern struct timezone sys_tz;
@ -23,50 +24,68 @@ extern struct timezone sys_tz;
static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
static int affs_remount (struct super_block *sb, int *flags, char *data);
static void
affs_commit_super(struct super_block *sb, int clean)
{
struct affs_sb_info *sbi = AFFS_SB(sb);
struct buffer_head *bh = sbi->s_root_bh;
struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
tail->bm_flag = cpu_to_be32(clean);
secs_to_datestamp(get_seconds(), &tail->disk_change);
affs_fix_checksum(sb, bh);
mark_buffer_dirty(bh);
}
static void
affs_put_super(struct super_block *sb)
{
struct affs_sb_info *sbi = AFFS_SB(sb);
pr_debug("AFFS: put_super()\n");
if (!(sb->s_flags & MS_RDONLY)) {
AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(1);
secs_to_datestamp(get_seconds(),
&AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change);
affs_fix_checksum(sb, sbi->s_root_bh);
mark_buffer_dirty(sbi->s_root_bh);
}
lock_kernel();
if (!(sb->s_flags & MS_RDONLY))
affs_commit_super(sb, 1);
kfree(sbi->s_prefix);
affs_free_bitmap(sb);
affs_brelse(sbi->s_root_bh);
kfree(sbi);
sb->s_fs_info = NULL;
return;
unlock_kernel();
}
static void
affs_write_super(struct super_block *sb)
{
int clean = 2;
struct affs_sb_info *sbi = AFFS_SB(sb);
lock_super(sb);
if (!(sb->s_flags & MS_RDONLY)) {
// if (sbi->s_bitmap[i].bm_bh) {
// if (buffer_dirty(sbi->s_bitmap[i].bm_bh)) {
// clean = 0;
AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(clean);
secs_to_datestamp(get_seconds(),
&AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change);
affs_fix_checksum(sb, sbi->s_root_bh);
mark_buffer_dirty(sbi->s_root_bh);
affs_commit_super(sb, clean);
sb->s_dirt = !clean; /* redo until bitmap synced */
} else
sb->s_dirt = 0;
unlock_super(sb);
pr_debug("AFFS: write_super() at %lu, clean=%d\n", get_seconds(), clean);
}
static int
affs_sync_fs(struct super_block *sb, int wait)
{
lock_super(sb);
affs_commit_super(sb, 2);
sb->s_dirt = 0;
unlock_super(sb);
return 0;
}
static struct kmem_cache * affs_inode_cachep;
static struct inode *affs_alloc_inode(struct super_block *sb)
@ -124,6 +143,7 @@ static const struct super_operations affs_sops = {
.clear_inode = affs_clear_inode,
.put_super = affs_put_super,
.write_super = affs_write_super,
.sync_fs = affs_sync_fs,
.statfs = affs_statfs,
.remount_fs = affs_remount,
.show_options = generic_show_options,
@ -507,6 +527,7 @@ affs_remount(struct super_block *sb, int *flags, char *data)
kfree(new_opts);
return -EINVAL;
}
lock_kernel();
replace_mount_options(sb, new_opts);
sbi->s_flags = mount_flags;
@ -514,8 +535,10 @@ affs_remount(struct super_block *sb, int *flags, char *data)
sbi->s_uid = uid;
sbi->s_gid = gid;
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
unlock_kernel();
return 0;
}
if (*flags & MS_RDONLY) {
sb->s_dirt = 1;
while (sb->s_dirt)
@ -524,6 +547,7 @@ affs_remount(struct super_block *sb, int *flags, char *data)
} else
res = affs_init_bitmap(sb, flags);
unlock_kernel();
return res;
}

2
fs/afs/mntpt.c
View File

@ -244,7 +244,7 @@ static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd)
case -EBUSY:
/* someone else made a mount here whilst we were busy */
while (d_mountpoint(nd->path.dentry) &&
follow_down(&nd->path.mnt, &nd->path.dentry))
follow_down(&nd->path))
;
err = 0;
default:

4
fs/afs/super.c
View File

@ -440,8 +440,12 @@ static void afs_put_super(struct super_block *sb)
_enter("");
lock_kernel();
afs_put_volume(as->volume);
unlock_kernel();
_leave("");
}

5
fs/autofs/dirhash.c
View File

@ -85,13 +85,12 @@ struct autofs_dir_ent *autofs_expire(struct super_block *sb,
}
path.mnt = mnt;
path_get(&path);
if (!follow_down(&path.mnt, &path.dentry)) {
if (!follow_down(&path)) {
path_put(&path);
DPRINTK(("autofs: not expirable (not a mounted directory): %s\n", ent->name));
continue;
}
while (d_mountpoint(path.dentry) &&
follow_down(&path.mnt, &path.dentry))
while (d_mountpoint(path.dentry) && follow_down(&path));
;
umount_ok = may_umount(path.mnt);
path_put(&path);

6
fs/autofs4/autofs_i.h
View File

@ -223,12 +223,12 @@ int autofs4_wait(struct autofs_sb_info *,struct dentry *, enum autofs_notify);
int autofs4_wait_release(struct autofs_sb_info *,autofs_wqt_t,int);
void autofs4_catatonic_mode(struct autofs_sb_info *);
static inline int autofs4_follow_mount(struct vfsmount **mnt, struct dentry **dentry)
static inline int autofs4_follow_mount(struct path *path)
{
int res = 0;
while (d_mountpoint(*dentry)) {
int followed = follow_down(mnt, dentry);
while (d_mountpoint(path->dentry)) {
int followed = follow_down(path);
if (!followed)
break;
res = 1;

195
fs/autofs4/dev-ioctl.c
View File

@ -192,77 +192,42 @@ static int autofs_dev_ioctl_protosubver(struct file *fp,
return 0;
}
/*
* Walk down the mount stack looking for an autofs mount that
* has the requested device number (aka. new_encode_dev(sb->s_dev).
*/
static int autofs_dev_ioctl_find_super(struct nameidata *nd, dev_t devno)
static int find_autofs_mount(const char *pathname,
struct path *res,
int test(struct path *path, void *data),
void *data)
{
struct dentry *dentry;
struct inode *inode;
struct super_block *sb;
dev_t s_dev;
unsigned int err;
struct path path;
int err = kern_path(pathname, 0, &path);
if (err)
return err;
err = -ENOENT;
/* Lookup the dentry name at the base of our mount point */
dentry = d_lookup(nd->path.dentry, &nd->last);
if (!dentry)
goto out;
dput(nd->path.dentry);
nd->path.dentry = dentry;
/* And follow the mount stack looking for our autofs mount */
while (follow_down(&nd->path.mnt, &nd->path.dentry)) {
inode = nd->path.dentry->d_inode;
if (!inode)
break;
sb = inode->i_sb;
s_dev = new_encode_dev(sb->s_dev);
if (devno == s_dev) {
if (sb->s_magic == AUTOFS_SUPER_MAGIC) {
while (path.dentry == path.mnt->mnt_root) {
if (path.mnt->mnt_sb->s_magic == AUTOFS_SUPER_MAGIC) {
if (test(&path, data)) {
path_get(&path);
if (!err) /* already found some */
path_put(res);
*res = path;
err = 0;
break;
}
}
if (!follow_up(&path))
break;
}
out:
path_put(&path);
return err;
}
/*
* Walk down the mount stack looking for an autofs mount that
* has the requested mount type (ie. indirect, direct or offset).
*/
static int autofs_dev_ioctl_find_sbi_type(struct nameidata *nd, unsigned int type)
static int test_by_dev(struct path *path, void *p)
{
struct dentry *dentry;
struct autofs_info *ino;
unsigned int err;
return path->mnt->mnt_sb->s_dev == *(dev_t *)p;
}
err = -ENOENT;
/* Lookup the dentry name at the base of our mount point */
dentry = d_lookup(nd->path.dentry, &nd->last);
if (!dentry)
goto out;
dput(nd->path.dentry);
nd->path.dentry = dentry;
/* And follow the mount stack looking for our autofs mount */
while (follow_down(&nd->path.mnt, &nd->path.dentry)) {
ino = autofs4_dentry_ino(nd->path.dentry);
if (ino && ino->sbi->type & type) {
err = 0;
break;
}
}
out:
return err;
static int test_by_type(struct path *path, void *p)
{
struct autofs_info *ino = autofs4_dentry_ino(path->dentry);
return ino && ino->sbi->type & *(unsigned *)p;
}
static void autofs_dev_ioctl_fd_install(unsigned int fd, struct file *file)
@ -283,31 +248,25 @@ static void autofs_dev_ioctl_fd_install(unsigned int fd, struct file *file)
* Open a file descriptor on the autofs mount point corresponding
* to the given path and device number (aka. new_encode_dev(sb->s_dev)).
*/
static int autofs_dev_ioctl_open_mountpoint(const char *path, dev_t devid)
static int autofs_dev_ioctl_open_mountpoint(const char *name, dev_t devid)
{
struct file *filp;
struct nameidata nd;
int err, fd;
fd = get_unused_fd();
if (likely(fd >= 0)) {
/* Get nameidata of the parent directory */
err = path_lookup(path, LOOKUP_PARENT, &nd);
struct file *filp;
struct path path;
err = find_autofs_mount(name, &path, test_by_dev, &devid);
if (err)
goto out;
/*
* Search down, within the parent, looking for an
* autofs super block that has the device number
* Find autofs super block that has the device number
* corresponding to the autofs fs we want to open.
*/
err = autofs_dev_ioctl_find_super(&nd, devid);
if (err) {
path_put(&nd.path);
goto out;
}
filp = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY,
filp = dentry_open(path.dentry, path.mnt, O_RDONLY,
current_cred());
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
@ -340,7 +299,7 @@ static int autofs_dev_ioctl_openmount(struct file *fp,
param->ioctlfd = -1;
path = param->path;
devid = param->openmount.devid;
devid = new_decode_dev(param->openmount.devid);
err = 0;
fd = autofs_dev_ioctl_open_mountpoint(path, devid);
@ -475,8 +434,7 @@ static int autofs_dev_ioctl_requester(struct file *fp,
struct autofs_dev_ioctl *param)
{
struct autofs_info *ino;
struct nameidata nd;
const char *path;
struct path path;
dev_t devid;
int err = -ENOENT;
@ -485,32 +443,24 @@ static int autofs_dev_ioctl_requester(struct file *fp,
goto out;
}
path = param->path;
devid = new_encode_dev(sbi->sb->s_dev);
devid = sbi->sb->s_dev;
param->requester.uid = param->requester.gid = -1;
/* Get nameidata of the parent directory */
err = path_lookup(path, LOOKUP_PARENT, &nd);
err = find_autofs_mount(param->path, &path, test_by_dev, &devid);
if (err)
goto out;
err = autofs_dev_ioctl_find_super(&nd, devid);
if (err)
goto out_release;
ino = autofs4_dentry_ino(nd.path.dentry);
ino = autofs4_dentry_ino(path.dentry);
if (ino) {
err = 0;
autofs4_expire_wait(nd.path.dentry);
autofs4_expire_wait(path.dentry);
spin_lock(&sbi->fs_lock);
param->requester.uid = ino->uid;
param->requester.gid = ino->gid;
spin_unlock(&sbi->fs_lock);
}
out_release:
path_put(&nd.path);
path_put(&path);
out:
return err;
}
@ -569,8 +519,8 @@ static int autofs_dev_ioctl_ismountpoint(struct file *fp,
struct autofs_sb_info *sbi,
struct autofs_dev_ioctl *param)
{
struct nameidata nd;
const char *path;
struct path path;
const char *name;
unsigned int type;
unsigned int devid, magic;
int err = -ENOENT;
@ -580,71 +530,46 @@ static int autofs_dev_ioctl_ismountpoint(struct file *fp,
goto out;
}
path = param->path;
name = param->path;
type = param->ismountpoint.in.type;
param->ismountpoint.out.devid = devid = 0;
param->ismountpoint.out.magic = magic = 0;
if (!fp || param->ioctlfd == -1) {
if (autofs_type_any(type)) {
struct super_block *sb;
err = path_lookup(path, LOOKUP_FOLLOW, &nd);
if (err)
goto out;
sb = nd.path.dentry->d_sb;
devid = new_encode_dev(sb->s_dev);
} else {
struct autofs_info *ino;
err = path_lookup(path, LOOKUP_PARENT, &nd);
if (err)
goto out;
err = autofs_dev_ioctl_find_sbi_type(&nd, type);
if (err)
goto out_release;
ino = autofs4_dentry_ino(nd.path.dentry);
devid = autofs4_get_dev(ino->sbi);
}
if (autofs_type_any(type))
err = kern_path(name, LOOKUP_FOLLOW, &path);
else
err = find_autofs_mount(name, &path, test_by_type, &type);
if (err)
goto out;
devid = new_encode_dev(path.mnt->mnt_sb->s_dev);
err = 0;
if (nd.path.dentry->d_inode &&
nd.path.mnt->mnt_root == nd.path.dentry) {
if (path.dentry->d_inode &&
path.mnt->mnt_root == path.dentry) {
err = 1;
magic = nd.path.dentry->d_inode->i_sb->s_magic;
magic = path.dentry->d_inode->i_sb->s_magic;
}
} else {
dev_t dev = autofs4_get_dev(sbi);
dev_t dev = sbi->sb->s_dev;
err = path_lookup(path, LOOKUP_PARENT, &nd);
err = find_autofs_mount(name, &path, test_by_dev, &dev);
if (err)
goto out;
err = autofs_dev_ioctl_find_super(&nd, dev);
if (err)
goto out_release;
devid = new_encode_dev(dev);
devid = dev;
err = have_submounts(path.dentry);
err = have_submounts(nd.path.dentry);
if (nd.path.mnt->mnt_mountpoint != nd.path.mnt->mnt_root) {
if (follow_down(&nd.path.mnt, &nd.path.dentry)) {
struct inode *inode = nd.path.dentry->d_inode;
magic = inode->i_sb->s_magic;
}
if (path.mnt->mnt_mountpoint != path.mnt->mnt_root) {
if (follow_down(&path))
magic = path.mnt->mnt_sb->s_magic;
}
}
param->ismountpoint.out.devid = devid;
param->ismountpoint.out.magic = magic;
out_release:
path_put(&nd.path);
path_put(&path);
out:
return err;
}

15
fs/autofs4/expire.c
View File

@ -48,19 +48,19 @@ static inline int autofs4_can_expire(struct dentry *dentry,
static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry)
{
struct dentry *top = dentry;
struct path path = {.mnt = mnt, .dentry = dentry};
int status = 1;
DPRINTK("dentry %p %.*s",
dentry, (int)dentry->d_name.len, dentry->d_name.name);
mntget(mnt);
dget(dentry);
path_get(&path);
if (!follow_down(&mnt, &dentry))
if (!follow_down(&path))
goto done;
if (is_autofs4_dentry(dentry)) {
struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
if (is_autofs4_dentry(path.dentry)) {
struct autofs_sb_info *sbi = autofs4_sbi(path.dentry->d_sb);
/* This is an autofs submount, we can't expire it */
if (autofs_type_indirect(sbi->type))
@ -70,7 +70,7 @@ static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry)
* Otherwise it's an offset mount and we need to check
* if we can umount its mount, if there is one.
*/
if (!d_mountpoint(dentry)) {
if (!d_mountpoint(path.dentry)) {
status = 0;
goto done;
}
@ -86,8 +86,7 @@ static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry)
status = 0;
done:
DPRINTK("returning = %d", status);
dput(dentry);
mntput(mnt);
path_put(&path);
return status;
}

7
fs/autofs4/root.c
View File

@ -181,7 +181,7 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
nd->flags);
/*
* For an expire of a covered direct or offset mount we need
* to beeak out of follow_down() at the autofs mount trigger
* to break out of follow_down() at the autofs mount trigger
* (d_mounted--), so we can see the expiring flag, and manage
* the blocking and following here until the expire is completed.
*/
@ -190,7 +190,7 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
if (ino->flags & AUTOFS_INF_EXPIRING) {
spin_unlock(&sbi->fs_lock);
/* Follow down to our covering mount. */
if (!follow_down(&nd->path.mnt, &nd->path.dentry))
if (!follow_down(&nd->path))
goto done;
goto follow;
}
@ -230,8 +230,7 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
* to follow it.
*/
if (d_mountpoint(dentry)) {
if (!autofs4_follow_mount(&nd->path.mnt,
&nd->path.dentry)) {
if (!autofs4_follow_mount(&nd->path)) {
status = -ENOENT;
goto out_error;
}

5
fs/befs/linuxvfs.c
View File

@ -737,6 +737,8 @@ parse_options(char *options, befs_mount_options * opts)
static void
befs_put_super(struct super_block *sb)
{
lock_kernel();
kfree(BEFS_SB(sb)->mount_opts.iocharset);
BEFS_SB(sb)->mount_opts.iocharset = NULL;
@ -747,7 +749,8 @@ befs_put_super(struct super_block *sb)
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
return;
unlock_kernel();
}
/* Allocate private field of the superblock, fill it.

8
fs/bfs/dir.c
View File

@ -79,7 +79,7 @@ static int bfs_readdir(struct file *f, void *dirent, filldir_t filldir)
const struct file_operations bfs_dir_operations = {
.read = generic_read_dir,
.readdir = bfs_readdir,
.fsync = file_fsync,
.fsync = simple_fsync,
.llseek = generic_file_llseek,
};
@ -205,7 +205,7 @@ static int bfs_unlink(struct inode *dir, struct dentry *dentry)
inode->i_nlink = 1;
}
de->ino = 0;
mark_buffer_dirty(bh);
mark_buffer_dirty_inode(bh, dir);
dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
inode->i_ctime = dir->i_ctime;
@ -267,7 +267,7 @@ static int bfs_rename(struct inode *old_dir, struct dentry *old_dentry,
new_inode->i_ctime = CURRENT_TIME_SEC;
inode_dec_link_count(new_inode);
}
mark_buffer_dirty(old_bh);
mark_buffer_dirty_inode(old_bh, old_dir);
error = 0;
end_rename:
@ -320,7 +320,7 @@ static int bfs_add_entry(struct inode *dir, const unsigned char *name,
for (i = 0; i < BFS_NAMELEN; i++)
de->name[i] =
(i < namelen) ? name[i] : 0;
mark_buffer_dirty(bh);
mark_buffer_dirty_inode(bh, dir);
brelse(bh);
return 0;
}

52
fs/bfs/inode.c
View File

@ -30,6 +30,7 @@ MODULE_LICENSE("GPL");
#define dprintf(x...)
#endif
static void bfs_write_super(struct super_block *s);
void dump_imap(const char *prefix, struct super_block *s);
struct inode *bfs_iget(struct super_block *sb, unsigned long ino)
@ -97,14 +98,15 @@ struct inode *bfs_iget(struct super_block *sb, unsigned long ino)
return ERR_PTR(-EIO);
}
static int bfs_write_inode(struct inode *inode, int unused)
static int bfs_write_inode(struct inode *inode, int wait)
{
struct bfs_sb_info *info = BFS_SB(inode->i_sb);
unsigned int ino = (u16)inode->i_ino;
unsigned long i_sblock;
struct bfs_inode *di;
struct buffer_head *bh;
int block, off;
struct bfs_sb_info *info = BFS_SB(inode->i_sb);
int err = 0;
dprintf("ino=%08x\n", ino);
@ -145,9 +147,14 @@ static int bfs_write_inode(struct inode *inode, int unused)
di->i_eoffset = cpu_to_le32(i_sblock * BFS_BSIZE + inode->i_size - 1);
mark_buffer_dirty(bh);
if (wait) {
sync_dirty_buffer(bh);
if (buffer_req(bh) && !buffer_uptodate(bh))
err = -EIO;
}
brelse(bh);
mutex_unlock(&info->bfs_lock);
return 0;
return err;
}
static void bfs_delete_inode(struct inode *inode)
@ -209,6 +216,26 @@ static void bfs_delete_inode(struct inode *inode)
clear_inode(inode);
}
static int bfs_sync_fs(struct super_block *sb, int wait)
{
struct bfs_sb_info *info = BFS_SB(sb);
mutex_lock(&info->bfs_lock);
mark_buffer_dirty(info->si_sbh);
sb->s_dirt = 0;
mutex_unlock(&info->bfs_lock);
return 0;
}
static void bfs_write_super(struct super_block *sb)
{
if (!(sb->s_flags & MS_RDONLY))
bfs_sync_fs(sb, 1);
else
sb->s_dirt = 0;
}
static void bfs_put_super(struct super_block *s)
{
struct bfs_sb_info *info = BFS_SB(s);
@ -216,11 +243,18 @@ static void bfs_put_super(struct super_block *s)
if (!info)
return;
lock_kernel();
if (s->s_dirt)
bfs_write_super(s);
brelse(info->si_sbh);
mutex_destroy(&info->bfs_lock);
kfree(info->si_imap);
kfree(info);
s->s_fs_info = NULL;
unlock_kernel();
}
static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf)
@ -240,17 +274,6 @@ static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf)
return 0;
}
static void bfs_write_super(struct super_block *s)
{
struct bfs_sb_info *info = BFS_SB(s);
mutex_lock(&info->bfs_lock);
if (!(s->s_flags & MS_RDONLY))
mark_buffer_dirty(info->si_sbh);
s->s_dirt = 0;
mutex_unlock(&info->bfs_lock);
}
static struct kmem_cache *bfs_inode_cachep;
static struct inode *bfs_alloc_inode(struct super_block *sb)
@ -298,6 +321,7 @@ static const struct super_operations bfs_sops = {
.delete_inode = bfs_delete_inode,
.put_super = bfs_put_super,
.write_super = bfs_write_super,
.sync_fs = bfs_sync_fs,
.statfs = bfs_statfs,
};

19
fs/block_dev.c
View File

@ -176,17 +176,22 @@ blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
iov, offset, nr_segs, blkdev_get_blocks, NULL);
}
int __sync_blockdev(struct block_device *bdev, int wait)
{
if (!bdev)
return 0;
if (!wait)
return filemap_flush(bdev->bd_inode->i_mapping);
return filemap_write_and_wait(bdev->bd_inode->i_mapping);
}
/*
* Write out and wait upon all the dirty data associated with a block
* device via its mapping. Does not take the superblock lock.
*/
int sync_blockdev(struct block_device *bdev)
{
int ret = 0;
if (bdev)
ret = filemap_write_and_wait(bdev->bd_inode->i_mapping);
return ret;
return __sync_blockdev(bdev, 1);
}
EXPORT_SYMBOL(sync_blockdev);
@ -199,7 +204,7 @@ int fsync_bdev(struct block_device *bdev)
{
struct super_block *sb = get_super(bdev);
if (sb) {
int res = fsync_super(sb);
int res = sync_filesystem(sb);
drop_super(sb);
return res;
}
@ -241,7 +246,7 @@ struct super_block *freeze_bdev(struct block_device *bdev)
sb->s_frozen = SB_FREEZE_WRITE;
smp_wmb();
__fsync_super(sb);
sync_filesystem(sb);
sb->s_frozen = SB_FREEZE_TRANS;
smp_wmb();

7
fs/btrfs/inode.c
View File

@ -2322,7 +2322,6 @@ int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
btrfs_update_inode(trans, root, dir);
btrfs_drop_nlink(inode);
ret = btrfs_update_inode(trans, root, inode);
dir->i_sb->s_dirt = 1;
out:
return ret;
}
@ -2806,7 +2805,6 @@ noinline int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
pending_del_nr);
}
btrfs_free_path(path);
inode->i_sb->s_dirt = 1;
return ret;
}
@ -3768,7 +3766,6 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
init_special_inode(inode, inode->i_mode, rdev);
btrfs_update_inode(trans, root, inode);
}
dir->i_sb->s_dirt = 1;
btrfs_update_inode_block_group(trans, inode);
btrfs_update_inode_block_group(trans, dir);
out_unlock:
@ -3833,7 +3830,6 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
inode->i_op = &btrfs_file_inode_operations;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
dir->i_sb->s_dirt = 1;
btrfs_update_inode_block_group(trans, inode);
btrfs_update_inode_block_group(trans, dir);
out_unlock:
@ -3880,7 +3876,6 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
if (err)
drop_inode = 1;
dir->i_sb->s_dirt = 1;
btrfs_update_inode_block_group(trans, dir);
err = btrfs_update_inode(trans, root, inode);
@ -3962,7 +3957,6 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
d_instantiate(dentry, inode);
drop_on_err = 0;
dir->i_sb->s_dirt = 1;
btrfs_update_inode_block_group(trans, inode);
btrfs_update_inode_block_group(trans, dir);
@ -4991,7 +4985,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
inode->i_op = &btrfs_file_inode_operations;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
dir->i_sb->s_dirt = 1;
btrfs_update_inode_block_group(trans, inode);
btrfs_update_inode_block_group(trans, dir);
if (drop_inode)

11
fs/btrfs/super.c
View File

@ -394,10 +394,6 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
struct btrfs_root *root = btrfs_sb(sb);
int ret;
if (sb->s_flags & MS_RDONLY)
return 0;
sb->s_dirt = 0;
if (!wait) {
filemap_flush(root->fs_info->btree_inode->i_mapping);
return 0;
@ -408,7 +404,6 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
trans = btrfs_start_transaction(root, 1);
ret = btrfs_commit_transaction(trans, root);
sb->s_dirt = 0;
return ret;
}
@ -454,11 +449,6 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
return 0;
}
static void btrfs_write_super(struct super_block *sb)
{
sb->s_dirt = 0;
}
static int btrfs_test_super(struct super_block *s, void *data)
{
struct btrfs_fs_devices *test_fs_devices = data;
@ -689,7 +679,6 @@ static int btrfs_unfreeze(struct super_block *sb)
static struct super_operations btrfs_super_ops = {
.delete_inode = btrfs_delete_inode,
.put_super = btrfs_put_super,
.write_super = btrfs_write_super,
.sync_fs = btrfs_sync_fs,
.show_options = btrfs_show_options,
.write_inode = btrfs_write_inode,

4
fs/cachefiles/interface.c
View File

@ -354,7 +354,9 @@ static void cachefiles_sync_cache(struct fscache_cache *_cache)
/* make sure all pages pinned by operations on behalf of the netfs are
* written to disc */
cachefiles_begin_secure(cache, &saved_cred);
ret = fsync_super(cache->mnt->mnt_sb);
down_read(&cache->mnt->mnt_sb->s_umount);
ret = sync_filesystem(cache->mnt->mnt_sb);
up_read(&cache->mnt->mnt_sb->s_umount);
cachefiles_end_secure(cache, saved_cred);
if (ret == -EIO)

14
fs/char_dev.c
View File

@ -375,7 +375,6 @@ static int chrdev_open(struct inode *inode, struct file *filp)
p = inode->i_cdev;
if (!p) {
inode->i_cdev = p = new;
inode->i_cindex = idx;
list_add(&inode->i_devices, &p->list);
new = NULL;
} else if (!cdev_get(p))
@ -405,6 +404,18 @@ static int chrdev_open(struct inode *inode, struct file *filp)
return ret;
}
int cdev_index(struct inode *inode)
{
int idx;
struct kobject *kobj;
kobj = kobj_lookup(cdev_map, inode->i_rdev, &idx);
if (!kobj)
return -1;
kobject_put(kobj);
return idx;
}
void cd_forget(struct inode *inode)
{
spin_lock(&cdev_lock);
@ -557,6 +568,7 @@ EXPORT_SYMBOL(cdev_init);
EXPORT_SYMBOL(cdev_alloc);
EXPORT_SYMBOL(cdev_del);
EXPORT_SYMBOL(cdev_add);
EXPORT_SYMBOL(cdev_index);
EXPORT_SYMBOL(register_chrdev);
EXPORT_SYMBOL(unregister_chrdev);
EXPORT_SYMBOL(directly_mappable_cdev_bdi);

2
fs/cifs/cifs_dfs_ref.c
View File

@ -275,7 +275,7 @@ static int add_mount_helper(struct vfsmount *newmnt, struct nameidata *nd,
case -EBUSY:
/* someone else made a mount here whilst we were busy */
while (d_mountpoint(nd->path.dentry) &&
follow_down(&nd->path.mnt, &nd->path.dentry))
follow_down(&nd->path))
;
err = 0;
default:

6
fs/cifs/cifsfs.c
View File

@ -204,6 +204,9 @@ cifs_put_super(struct super_block *sb)
cFYI(1, ("Empty cifs superblock info passed to unmount"));
return;
}
lock_kernel();
rc = cifs_umount(sb, cifs_sb);
if (rc)
cERROR(1, ("cifs_umount failed with return code %d", rc));
@ -216,7 +219,8 @@ cifs_put_super(struct super_block *sb)
unload_nls(cifs_sb->local_nls);
kfree(cifs_sb);
return;
unlock_kernel();
}
static int

2
fs/compat.c
View File

@ -812,10 +812,8 @@ asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
}
}
lock_kernel();
retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
flags, (void*)data_page);
unlock_kernel();
out4:
free_page(data_page);

7
fs/dcache.c
View File

@ -1910,7 +1910,7 @@ char *__d_path(const struct path *path, struct path *root,
spin_lock(&vfsmount_lock);
prepend(&end, &buflen, "\0", 1);
if (!IS_ROOT(dentry) && d_unhashed(dentry) &&
if (d_unlinked(dentry) &&
(prepend(&end, &buflen, " (deleted)", 10) != 0))
goto Elong;
@ -2035,7 +2035,7 @@ char *dentry_path(struct dentry *dentry, char *buf, int buflen)
spin_lock(&dcache_lock);
prepend(&end, &buflen, "\0", 1);
if (!IS_ROOT(dentry) && d_unhashed(dentry) &&
if (d_unlinked(dentry) &&
(prepend(&end, &buflen, "//deleted", 9) != 0))
goto Elong;
if (buflen < 1)
@ -2097,9 +2097,8 @@ SYSCALL_DEFINE2(getcwd, char __user *, buf, unsigned long, size)
read_unlock(&current->fs->lock);
error = -ENOENT;
/* Has the current directory has been unlinked? */
spin_lock(&dcache_lock);
if (IS_ROOT(pwd.dentry) || !d_unhashed(pwd.dentry)) {
if (!d_unlinked(pwd.dentry)) {
unsigned long len;
struct path tmp = root;
char * cwd;

5
fs/ecryptfs/super.c
View File

@ -27,6 +27,7 @@
#include <linux/mount.h>
#include <linux/key.h>
#include <linux/seq_file.h>
#include <linux/smp_lock.h>
#include <linux/file.h>
#include <linux/crypto.h>
#include "ecryptfs_kernel.h"
@ -120,9 +121,13 @@ static void ecryptfs_put_super(struct super_block *sb)
{
struct ecryptfs_sb_info *sb_info = ecryptfs_superblock_to_private(sb);
lock_kernel();
ecryptfs_destroy_mount_crypt_stat(&sb_info->mount_crypt_stat);
kmem_cache_free(ecryptfs_sb_info_cache, sb_info);
ecryptfs_set_superblock_private(sb, NULL);
unlock_kernel();
}
/**

25
fs/exofs/super.c
View File

@ -200,20 +200,21 @@ static const struct export_operations exofs_export_ops;
/*
* Write the superblock to the OSD
*/
static void exofs_write_super(struct super_block *sb)
static int exofs_sync_fs(struct super_block *sb, int wait)
{
struct exofs_sb_info *sbi;
struct exofs_fscb *fscb;
struct osd_request *or;
struct osd_obj_id obj;
int ret;
int ret = -ENOMEM;
fscb = kzalloc(sizeof(struct exofs_fscb), GFP_KERNEL);
if (!fscb) {
EXOFS_ERR("exofs_write_super: memory allocation failed.\n");
return;
return -ENOMEM;
}
lock_super(sb);
lock_kernel();
sbi = sb->s_fs_info;
fscb->s_nextid = cpu_to_le64(sbi->s_nextid);
@ -246,7 +247,17 @@ static void exofs_write_super(struct super_block *sb)
if (or)
osd_end_request(or);
unlock_kernel();
unlock_super(sb);
kfree(fscb);
return ret;
}
static void exofs_write_super(struct super_block *sb)
{
if (!(sb->s_flags & MS_RDONLY))
exofs_sync_fs(sb, 1);
else
sb->s_dirt = 0;
}
/*
@ -258,6 +269,11 @@ static void exofs_put_super(struct super_block *sb)
int num_pend;
struct exofs_sb_info *sbi = sb->s_fs_info;
lock_kernel();
if (sb->s_dirt)
exofs_write_super(sb);
/* make sure there are no pending commands */
for (num_pend = atomic_read(&sbi->s_curr_pending); num_pend > 0;
num_pend = atomic_read(&sbi->s_curr_pending)) {
@ -271,6 +287,8 @@ static void exofs_put_super(struct super_block *sb)
osduld_put_device(sbi->s_dev);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
unlock_kernel();
}
/*
@ -484,6 +502,7 @@ static const struct super_operations exofs_sops = {
.delete_inode = exofs_delete_inode,
.put_super = exofs_put_super,
.write_super = exofs_write_super,
.sync_fs = exofs_sync_fs,
.statfs = exofs_statfs,
};

2
fs/ext2/Makefile
View File

@ -4,7 +4,7 @@
obj-$(CONFIG_EXT2_FS) += ext2.o
ext2-y := balloc.o dir.o file.o fsync.o ialloc.o inode.o \
ext2-y := balloc.o dir.o file.o ialloc.o inode.o \
ioctl.o namei.o super.o symlink.o
ext2-$(CONFIG_EXT2_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o

2
fs/ext2/dir.c
View File

@ -720,5 +720,5 @@ const struct file_operations ext2_dir_operations = {
#ifdef CONFIG_COMPAT
.compat_ioctl = ext2_compat_ioctl,
#endif
.fsync = ext2_sync_file,
.fsync = simple_fsync,
};

3
fs/ext2/ext2.h
View File

@ -113,9 +113,6 @@ extern int ext2_empty_dir (struct inode *);
extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **);
extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *);
/* fsync.c */
extern int ext2_sync_file (struct file *, struct dentry *, int);
/* ialloc.c */
extern struct inode * ext2_new_inode (struct inode *, int);
extern void ext2_free_inode (struct inode *);

4
fs/ext2/file.c
View File

@ -55,7 +55,7 @@ const struct file_operations ext2_file_operations = {
.mmap = generic_file_mmap,
.open = generic_file_open,
.release = ext2_release_file,
.fsync = ext2_sync_file,
.fsync = simple_fsync,
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
};
@ -72,7 +72,7 @@ const struct file_operations ext2_xip_file_operations = {
.mmap = xip_file_mmap,
.open = generic_file_open,
.release = ext2_release_file,
.fsync = ext2_sync_file,
.fsync = simple_fsync,
};
#endif

50
fs/ext2/fsync.c
View File

@ -1,50 +0,0 @@
/*
* linux/fs/ext2/fsync.c
*
* Copyright (C) 1993 Stephen Tweedie (sct@dcs.ed.ac.uk)
* from
* Copyright (C) 1992 Remy Card (card@masi.ibp.fr)
* Laboratoire MASI - Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
* from
* linux/fs/minix/truncate.c Copyright (C) 1991, 1992 Linus Torvalds
*
* ext2fs fsync primitive
*
* Big-endian to little-endian byte-swapping/bitmaps by
* David S. Miller (davem@caip.rutgers.edu), 1995
*
* Removed unnecessary code duplication for little endian machines
* and excessive __inline__s.
* Andi Kleen, 1997
*
* Major simplications and cleanup - we only need to do the metadata, because
* we can depend on generic_block_fdatasync() to sync the data blocks.
*/
#include "ext2.h"
#include <linux/buffer_head.h> /* for sync_mapping_buffers() */
/*
* File may be NULL when we are called. Perhaps we shouldn't
* even pass file to fsync ?
*/
int ext2_sync_file(struct file *file, struct dentry *dentry, int datasync)
{
struct inode *inode = dentry->d_inode;
int err;
int ret;
ret = sync_mapping_buffers(inode->i_mapping);
if (!(inode->i_state & I_DIRTY))
return ret;
if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
return ret;
err = ext2_sync_inode(inode);
if (ret == 0)
ret = err;
return ret;
}

11
fs/ext2/inode.c
View File

@ -41,8 +41,6 @@ MODULE_AUTHOR("Remy Card and others");
MODULE_DESCRIPTION("Second Extended Filesystem");
MODULE_LICENSE("GPL");
static int ext2_update_inode(struct inode * inode, int do_sync);
/*
* Test whether an inode is a fast symlink.
*/
@ -66,7 +64,7 @@ void ext2_delete_inode (struct inode * inode)
goto no_delete;
EXT2_I(inode)->i_dtime = get_seconds();
mark_inode_dirty(inode);
ext2_update_inode(inode, inode_needs_sync(inode));
ext2_write_inode(inode, inode_needs_sync(inode));
inode->i_size = 0;
if (inode->i_blocks)
@ -1337,7 +1335,7 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
return ERR_PTR(ret);
}
static int ext2_update_inode(struct inode * inode, int do_sync)
int ext2_write_inode(struct inode *inode, int do_sync)
{
struct ext2_inode_info *ei = EXT2_I(inode);
struct super_block *sb = inode->i_sb;
@ -1442,11 +1440,6 @@ static int ext2_update_inode(struct inode * inode, int do_sync)
return err;
}
int ext2_write_inode(struct inode *inode, int wait)
{
return ext2_update_inode(inode, wait);
}
int ext2_sync_inode(struct inode *inode)
{
struct writeback_control wbc = {

60
fs/ext2/super.c
View File

@ -42,6 +42,7 @@ static void ext2_sync_super(struct super_block *sb,
struct ext2_super_block *es);
static int ext2_remount (struct super_block * sb, int * flags, char * data);
static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf);
static int ext2_sync_fs(struct super_block *sb, int wait);
void ext2_error (struct super_block * sb, const char * function,
const char * fmt, ...)
@ -114,6 +115,11 @@ static void ext2_put_super (struct super_block * sb)
int i;
struct ext2_sb_info *sbi = EXT2_SB(sb);
lock_kernel();
if (sb->s_dirt)
ext2_write_super(sb);
ext2_xattr_put_super(sb);
if (!(sb->s_flags & MS_RDONLY)) {
struct ext2_super_block *es = sbi->s_es;
@ -135,7 +141,7 @@ static void ext2_put_super (struct super_block * sb)
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
return;
unlock_kernel();
}
static struct kmem_cache * ext2_inode_cachep;
@ -304,6 +310,7 @@ static const struct super_operations ext2_sops = {
.delete_inode = ext2_delete_inode,
.put_super = ext2_put_super,
.write_super = ext2_write_super,
.sync_fs = ext2_sync_fs,
.statfs = ext2_statfs,
.remount_fs = ext2_remount,
.clear_inode = ext2_clear_inode,
@ -1127,25 +1134,36 @@ static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es)
* set s_state to EXT2_VALID_FS after some corrections.
*/
void ext2_write_super (struct super_block * sb)
static int ext2_sync_fs(struct super_block *sb, int wait)
{
struct ext2_super_block * es;
lock_kernel();
if (!(sb->s_flags & MS_RDONLY)) {
es = EXT2_SB(sb)->s_es;
struct ext2_super_block *es = EXT2_SB(sb)->s_es;
if (es->s_state & cpu_to_le16(EXT2_VALID_FS)) {
ext2_debug ("setting valid to 0\n");
es->s_state &= cpu_to_le16(~EXT2_VALID_FS);
es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb));
es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb));
es->s_mtime = cpu_to_le32(get_seconds());
ext2_sync_super(sb, es);
} else
ext2_commit_super (sb, es);
lock_kernel();
if (es->s_state & cpu_to_le16(EXT2_VALID_FS)) {
ext2_debug("setting valid to 0\n");
es->s_state &= cpu_to_le16(~EXT2_VALID_FS);
es->s_free_blocks_count =
cpu_to_le32(ext2_count_free_blocks(sb));
es->s_free_inodes_count =
cpu_to_le32(ext2_count_free_inodes(sb));
es->s_mtime = cpu_to_le32(get_seconds());
ext2_sync_super(sb, es);
} else {
ext2_commit_super(sb, es);
}
sb->s_dirt = 0;
unlock_kernel();
return 0;
}
void ext2_write_super(struct super_block *sb)
{
if (!(sb->s_flags & MS_RDONLY))
ext2_sync_fs(sb, 1);
else
sb->s_dirt = 0;
}
static int ext2_remount (struct super_block * sb, int * flags, char * data)
@ -1157,6 +1175,8 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
unsigned long old_sb_flags;
int err;
lock_kernel();
/* Store the old options */
old_sb_flags = sb->s_flags;
old_opts.s_mount_opt = sbi->s_mount_opt;
@ -1192,12 +1212,16 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
sbi->s_mount_opt &= ~EXT2_MOUNT_XIP;
sbi->s_mount_opt |= old_mount_opt & EXT2_MOUNT_XIP;
}
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
unlock_kernel();
return 0;
}
if (*flags & MS_RDONLY) {
if (le16_to_cpu(es->s_state) & EXT2_VALID_FS ||
!(sbi->s_mount_state & EXT2_VALID_FS))
!(sbi->s_mount_state & EXT2_VALID_FS)) {
unlock_kernel();
return 0;
}
/*
* OK, we are remounting a valid rw partition rdonly, so set
* the rdonly flag and then mark the partition as valid again.
@ -1224,12 +1248,14 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
sb->s_flags &= ~MS_RDONLY;
}
ext2_sync_super(sb, es);
unlock_kernel();
return 0;
restore_opts:
sbi->s_mount_opt = old_opts.s_mount_opt;
sbi->s_resuid = old_opts.s_resuid;
sbi->s_resgid = old_opts.s_resgid;
sb->s_flags = old_sb_flags;
unlock_kernel();
return err;
}

3
fs/ext3/balloc.c
View File

@ -649,7 +649,7 @@ void ext3_free_blocks_sb(handle_t *handle, struct super_block *sb,
count = overflow;
goto do_more;
}
sb->s_dirt = 1;
error_return:
brelse(bitmap_bh);
ext3_std_error(sb, err);
@ -1708,7 +1708,6 @@ ext3_fsblk_t ext3_new_blocks(handle_t *handle, struct inode *inode,
if (!fatal)
fatal = err;
sb->s_dirt = 1;
if (fatal)
goto out;

3
fs/ext3/ialloc.c
View File

@ -181,7 +181,7 @@ void ext3_free_inode (handle_t *handle, struct inode * inode)
err = ext3_journal_dirty_metadata(handle, bitmap_bh);
if (!fatal)
fatal = err;
sb->s_dirt = 1;
error_return:
brelse(bitmap_bh);
ext3_std_error(sb, fatal);
@ -537,7 +537,6 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
percpu_counter_dec(&sbi->s_freeinodes_counter);
if (S_ISDIR(mode))
percpu_counter_inc(&sbi->s_dirs_counter);
sb->s_dirt = 1;
inode->i_uid = current_fsuid();
if (test_opt (sb, GRPID))

1
fs/ext3/inode.c
View File

@ -2960,7 +2960,6 @@ static int ext3_do_update_inode(handle_t *handle,
ext3_update_dynamic_rev(sb);
EXT3_SET_RO_COMPAT_FEATURE(sb,
EXT3_FEATURE_RO_COMPAT_LARGE_FILE);
sb->s_dirt = 1;
handle->h_sync = 1;
err = ext3_journal_dirty_metadata(handle,
EXT3_SB(sb)->s_sbh);

2
fs/ext3/resize.c
View File

@ -934,7 +934,6 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
EXT3_INODES_PER_GROUP(sb));
ext3_journal_dirty_metadata(handle, sbi->s_sbh);
sb->s_dirt = 1;
exit_journal:
unlock_super(sb);
@ -1066,7 +1065,6 @@ int ext3_group_extend(struct super_block *sb, struct ext3_super_block *es,
}
es->s_blocks_count = cpu_to_le32(o_blocks_count + add);
ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
sb->s_dirt = 1;
unlock_super(sb);
ext3_debug("freeing blocks %lu through "E3FSBLK"\n", o_blocks_count,
o_blocks_count + add);

34
fs/ext3/super.c
View File

@ -67,7 +67,6 @@ static const char *ext3_decode_error(struct super_block * sb, int errno,
static int ext3_remount (struct super_block * sb, int * flags, char * data);
static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
static int ext3_unfreeze(struct super_block *sb);
static void ext3_write_super (struct super_block * sb);
static int ext3_freeze(struct super_block *sb);
/*
@ -399,6 +398,8 @@ static void ext3_put_super (struct super_block * sb)
struct ext3_super_block *es = sbi->s_es;
int i, err;
lock_kernel();
ext3_xattr_put_super(sb);
err = journal_destroy(sbi->s_journal);
sbi->s_journal = NULL;
@ -447,7 +448,8 @@ static void ext3_put_super (struct super_block * sb)
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
return;
unlock_kernel();
}
static struct kmem_cache *ext3_inode_cachep;
@ -761,7 +763,6 @@ static const struct super_operations ext3_sops = {
.dirty_inode = ext3_dirty_inode,
.delete_inode = ext3_delete_inode,
.put_super = ext3_put_super,
.write_super = ext3_write_super,
.sync_fs = ext3_sync_fs,
.freeze_fs = ext3_freeze,
.unfreeze_fs = ext3_unfreeze,
@ -1785,7 +1786,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
#else
es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
#endif
sb->s_dirt = 1;
}
if (sbi->s_blocks_per_group > blocksize * 8) {
@ -2265,7 +2265,6 @@ static int ext3_load_journal(struct super_block *sb,
if (journal_devnum &&
journal_devnum != le32_to_cpu(es->s_journal_dev)) {
es->s_journal_dev = cpu_to_le32(journal_devnum);
sb->s_dirt = 1;
/* Make sure we flush the recovery flag to disk. */
ext3_commit_super(sb, es, 1);
@ -2308,7 +2307,6 @@ static int ext3_create_journal(struct super_block * sb,
EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
es->s_journal_inum = cpu_to_le32(journal_inum);
sb->s_dirt = 1;
/* Make sure we flush the recovery flag to disk. */
ext3_commit_super(sb, es, 1);
@ -2354,7 +2352,6 @@ static void ext3_mark_recovery_complete(struct super_block * sb,
if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
sb->s_flags & MS_RDONLY) {
EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
sb->s_dirt = 0;
ext3_commit_super(sb, es, 1);
}
unlock_super(sb);
@ -2413,29 +2410,14 @@ int ext3_force_commit(struct super_block *sb)
return 0;
journal = EXT3_SB(sb)->s_journal;
sb->s_dirt = 0;
ret = ext3_journal_force_commit(journal);
return ret;
}
/*
* Ext3 always journals updates to the superblock itself, so we don't
* have to propagate any other updates to the superblock on disk at this
* point. (We can probably nuke this function altogether, and remove
* any mention to sb->s_dirt in all of fs/ext3; eventual cleanup...)
*/
static void ext3_write_super (struct super_block * sb)
{
if (mutex_trylock(&sb->s_lock) != 0)
BUG();
sb->s_dirt = 0;
}
static int ext3_sync_fs(struct super_block *sb, int wait)
{
tid_t target;
sb->s_dirt = 0;
if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
if (wait)
log_wait_commit(EXT3_SB(sb)->s_journal, target);
@ -2451,7 +2433,6 @@ static int ext3_freeze(struct super_block *sb)
{
int error = 0;
journal_t *journal;
sb->s_dirt = 0;
if (!(sb->s_flags & MS_RDONLY)) {
journal = EXT3_SB(sb)->s_journal;
@ -2509,7 +2490,10 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
int i;
#endif
lock_kernel();
/* Store the original options */
lock_super(sb);
old_sb_flags = sb->s_flags;
old_opts.s_mount_opt = sbi->s_mount_opt;
old_opts.s_resuid = sbi->s_resuid;
@ -2617,6 +2601,8 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
old_opts.s_qf_names[i] != sbi->s_qf_names[i])
kfree(old_opts.s_qf_names[i]);
#endif
unlock_super(sb);
unlock_kernel();
return 0;
restore_opts:
sb->s_flags = old_sb_flags;
@ -2633,6 +2619,8 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
sbi->s_qf_names[i] = old_opts.s_qf_names[i];
}
#endif
unlock_super(sb);
unlock_kernel();
return err;
}

1
fs/ext3/xattr.c
View File

@ -463,7 +463,6 @@ static void ext3_xattr_update_super_block(handle_t *handle,
if (ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh) == 0) {
EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_EXT_ATTR);
sb->s_dirt = 1;
ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
}
}

16
fs/ext4/super.c
View File

@ -576,6 +576,11 @@ static void ext4_put_super(struct super_block *sb)
struct ext4_super_block *es = sbi->s_es;
int i, err;
lock_super(sb);
lock_kernel();
if (sb->s_dirt)
ext4_commit_super(sb, 1);
ext4_release_system_zone(sb);
ext4_mb_release(sb);
ext4_ext_release(sb);
@ -642,8 +647,6 @@ static void ext4_put_super(struct super_block *sb)
unlock_super(sb);
kobject_put(&sbi->s_kobj);
wait_for_completion(&sbi->s_kobj_unregister);
lock_super(sb);
lock_kernel();
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
}
@ -3333,7 +3336,9 @@ int ext4_force_commit(struct super_block *sb)
static void ext4_write_super(struct super_block *sb)
{
lock_super(sb);
ext4_commit_super(sb, 1);
unlock_super(sb);
}
static int ext4_sync_fs(struct super_block *sb, int wait)
@ -3417,7 +3422,10 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
int i;
#endif
lock_kernel();
/* Store the original options */
lock_super(sb);
old_sb_flags = sb->s_flags;
old_opts.s_mount_opt = sbi->s_mount_opt;
old_opts.s_resuid = sbi->s_resuid;
@ -3551,6 +3559,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
old_opts.s_qf_names[i] != sbi->s_qf_names[i])
kfree(old_opts.s_qf_names[i]);
#endif
unlock_super(sb);
unlock_kernel();
return 0;
restore_opts:
@ -3570,6 +3580,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
sbi->s_qf_names[i] = old_opts.s_qf_names[i];
}
#endif
unlock_super(sb);
unlock_kernel();
return err;
}

16
fs/fat/dir.c
View File

@ -840,7 +840,7 @@ const struct file_operations fat_dir_operations = {
#ifdef CONFIG_COMPAT
.compat_ioctl = fat_compat_dir_ioctl,
#endif
.fsync = file_fsync,
.fsync = fat_file_fsync,
};
static int fat_get_short_entry(struct inode *dir, loff_t *pos,
@ -967,7 +967,7 @@ static int __fat_remove_entries(struct inode *dir, loff_t pos, int nr_slots)
de++;
nr_slots--;
}
mark_buffer_dirty(bh);
mark_buffer_dirty_inode(bh, dir);
if (IS_DIRSYNC(dir))
err = sync_dirty_buffer(bh);
brelse(bh);
@ -1001,7 +1001,7 @@ int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo)
de--;
nr_slots--;
}
mark_buffer_dirty(bh);
mark_buffer_dirty_inode(bh, dir);
if (IS_DIRSYNC(dir))
err = sync_dirty_buffer(bh);
brelse(bh);
@ -1051,7 +1051,7 @@ static int fat_zeroed_cluster(struct inode *dir, sector_t blknr, int nr_used,
}
memset(bhs[n]->b_data, 0, sb->s_blocksize);
set_buffer_uptodate(bhs[n]);
mark_buffer_dirty(bhs[n]);
mark_buffer_dirty_inode(bhs[n], dir);
n++;
blknr++;
@ -1131,7 +1131,7 @@ int fat_alloc_new_dir(struct inode *dir, struct timespec *ts)
de[0].size = de[1].size = 0;
memset(de + 2, 0, sb->s_blocksize - 2 * sizeof(*de));
set_buffer_uptodate(bhs[0]);
mark_buffer_dirty(bhs[0]);
mark_buffer_dirty_inode(bhs[0], dir);
err = fat_zeroed_cluster(dir, blknr, 1, bhs, MAX_BUF_PER_PAGE);
if (err)
@ -1193,7 +1193,7 @@ static int fat_add_new_entries(struct inode *dir, void *slots, int nr_slots,
slots += copy;
size -= copy;
set_buffer_uptodate(bhs[n]);
mark_buffer_dirty(bhs[n]);
mark_buffer_dirty_inode(bhs[n], dir);
if (!size)
break;
n++;
@ -1293,7 +1293,7 @@ int fat_add_entries(struct inode *dir, void *slots, int nr_slots,
for (i = 0; i < long_bhs; i++) {
int copy = min_t(int, sb->s_blocksize - offset, size);
memcpy(bhs[i]->b_data + offset, slots, copy);
mark_buffer_dirty(bhs[i]);
mark_buffer_dirty_inode(bhs[i], dir);
offset = 0;
slots += copy;
size -= copy;
@ -1304,7 +1304,7 @@ int fat_add_entries(struct inode *dir, void *slots, int nr_slots,
/* Fill the short name slot. */
int copy = min_t(int, sb->s_blocksize - offset, size);
memcpy(bhs[i]->b_data + offset, slots, copy);
mark_buffer_dirty(bhs[i]);
mark_buffer_dirty_inode(bhs[i], dir);
if (IS_DIRSYNC(dir))
err = sync_dirty_buffer(bhs[i]);
}

6
fs/fat/fat.h
View File

@ -74,6 +74,7 @@ struct msdos_sb_info {
int fatent_shift;
struct fatent_operations *fatent_ops;
struct inode *fat_inode;
spinlock_t inode_hash_lock;
struct hlist_head inode_hashtable[FAT_HASH_SIZE];
@ -251,6 +252,7 @@ struct fat_entry {
} u;
int nr_bhs;
struct buffer_head *bhs[2];
struct inode *fat_inode;
};
static inline void fatent_init(struct fat_entry *fatent)
@ -259,6 +261,7 @@ static inline void fatent_init(struct fat_entry *fatent)
fatent->entry = 0;
fatent->u.ent32_p = NULL;
fatent->bhs[0] = fatent->bhs[1] = NULL;
fatent->fat_inode = NULL;
}
static inline void fatent_set_entry(struct fat_entry *fatent, int entry)
@ -275,6 +278,7 @@ static inline void fatent_brelse(struct fat_entry *fatent)
brelse(fatent->bhs[i]);
fatent->nr_bhs = 0;
fatent->bhs[0] = fatent->bhs[1] = NULL;
fatent->fat_inode = NULL;
}
extern void fat_ent_access_init(struct super_block *sb);
@ -296,6 +300,8 @@ extern int fat_setattr(struct dentry * dentry, struct iattr * attr);
extern void fat_truncate(struct inode *inode);
extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat);
extern int fat_file_fsync(struct file *file, struct dentry *dentry,
int datasync);
/* fat/inode.c */
extern void fat_attach(struct inode *inode, loff_t i_pos);

13
fs/fat/fatent.c
View File

@ -73,6 +73,8 @@ static int fat12_ent_bread(struct super_block *sb, struct fat_entry *fatent,
struct buffer_head **bhs = fatent->bhs;
WARN_ON(blocknr < MSDOS_SB(sb)->fat_start);
fatent->fat_inode = MSDOS_SB(sb)->fat_inode;
bhs[0] = sb_bread(sb, blocknr);
if (!bhs[0])
goto err;
@ -103,6 +105,7 @@ static int fat_ent_bread(struct super_block *sb, struct fat_entry *fatent,
struct fatent_operations *ops = MSDOS_SB(sb)->fatent_ops;
WARN_ON(blocknr < MSDOS_SB(sb)->fat_start);
fatent->fat_inode = MSDOS_SB(sb)->fat_inode;
fatent->bhs[0] = sb_bread(sb, blocknr);
if (!fatent->bhs[0]) {
printk(KERN_ERR "FAT: FAT read failed (blocknr %llu)\n",
@ -167,9 +170,9 @@ static void fat12_ent_put(struct fat_entry *fatent, int new)
}
spin_unlock(&fat12_entry_lock);
mark_buffer_dirty(fatent->bhs[0]);
mark_buffer_dirty_inode(fatent->bhs[0], fatent->fat_inode);
if (fatent->nr_bhs == 2)
mark_buffer_dirty(fatent->bhs[1]);
mark_buffer_dirty_inode(fatent->bhs[1], fatent->fat_inode);
}
static void fat16_ent_put(struct fat_entry *fatent, int new)
@ -178,7 +181,7 @@ static void fat16_ent_put(struct fat_entry *fatent, int new)
new = EOF_FAT16;
*fatent->u.ent16_p = cpu_to_le16(new);
mark_buffer_dirty(fatent->bhs[0]);
mark_buffer_dirty_inode(fatent->bhs[0], fatent->fat_inode);
}
static void fat32_ent_put(struct fat_entry *fatent, int new)
@ -189,7 +192,7 @@ static void fat32_ent_put(struct fat_entry *fatent, int new)
WARN_ON(new & 0xf0000000);
new |= le32_to_cpu(*fatent->u.ent32_p) & ~0x0fffffff;
*fatent->u.ent32_p = cpu_to_le32(new);
mark_buffer_dirty(fatent->bhs[0]);
mark_buffer_dirty_inode(fatent->bhs[0], fatent->fat_inode);
}
static int fat12_ent_next(struct fat_entry *fatent)
@ -381,7 +384,7 @@ static int fat_mirror_bhs(struct super_block *sb, struct buffer_head **bhs,
}
memcpy(c_bh->b_data, bhs[n]->b_data, sb->s_blocksize);
set_buffer_uptodate(c_bh);
mark_buffer_dirty(c_bh);
mark_buffer_dirty_inode(c_bh, sbi->fat_inode);
if (sb->s_flags & MS_SYNCHRONOUS)
err = sync_dirty_buffer(c_bh);
brelse(c_bh);

14
fs/fat/file.c
View File

@ -133,6 +133,18 @@ static int fat_file_release(struct inode *inode, struct file *filp)
return 0;
}
int fat_file_fsync(struct file *filp, struct dentry *dentry, int datasync)
{
struct inode *inode = dentry->d_inode;
int res, err;
res = simple_fsync(filp, dentry, datasync);
err = sync_mapping_buffers(MSDOS_SB(inode->i_sb)->fat_inode->i_mapping);
return res ? res : err;
}
const struct file_operations fat_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,
@ -142,7 +154,7 @@ const struct file_operations fat_file_operations = {
.mmap = generic_file_mmap,
.release = fat_file_release,
.ioctl = fat_generic_ioctl,
.fsync = file_fsync,
.fsync = fat_file_fsync,
.splice_read = generic_file_splice_read,
};

31
fs/fat/inode.c
View File

@ -441,16 +441,35 @@ static void fat_clear_inode(struct inode *inode)
static void fat_write_super(struct super_block *sb)
{
lock_super(sb);
sb->s_dirt = 0;
if (!(sb->s_flags & MS_RDONLY))
fat_clusters_flush(sb);
unlock_super(sb);
}
static int fat_sync_fs(struct super_block *sb, int wait)
{
lock_super(sb);
fat_clusters_flush(sb);
sb->s_dirt = 0;
unlock_super(sb);
return 0;
}
static void fat_put_super(struct super_block *sb)
{
struct msdos_sb_info *sbi = MSDOS_SB(sb);
lock_kernel();
if (sb->s_dirt)
fat_write_super(sb);
iput(sbi->fat_inode);
if (sbi->nls_disk) {
unload_nls(sbi->nls_disk);
sbi->nls_disk = NULL;
@ -467,6 +486,8 @@ static void fat_put_super(struct super_block *sb)
sb->s_fs_info = NULL;
kfree(sbi);
unlock_kernel();
}
static struct kmem_cache *fat_inode_cachep;
@ -632,6 +653,7 @@ static const struct super_operations fat_sops = {
.delete_inode = fat_delete_inode,
.put_super = fat_put_super,
.write_super = fat_write_super,
.sync_fs = fat_sync_fs,
.statfs = fat_statfs,
.clear_inode = fat_clear_inode,
.remount_fs = fat_remount,
@ -1174,7 +1196,7 @@ static int fat_read_root(struct inode *inode)
int fat_fill_super(struct super_block *sb, void *data, int silent,
const struct inode_operations *fs_dir_inode_ops, int isvfat)
{
struct inode *root_inode = NULL;
struct inode *root_inode = NULL, *fat_inode = NULL;
struct buffer_head *bh;
struct fat_boot_sector *b;
struct msdos_sb_info *sbi;
@ -1414,6 +1436,11 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
}
error = -ENOMEM;
fat_inode = new_inode(sb);
if (!fat_inode)
goto out_fail;
MSDOS_I(fat_inode)->i_pos = 0;
sbi->fat_inode = fat_inode;
root_inode = new_inode(sb);
if (!root_inode)
goto out_fail;
@ -1439,6 +1466,8 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
" on dev %s.\n", sb->s_id);
out_fail:
if (fat_inode)
iput(fat_inode);
if (root_inode)
iput(root_inode);
if (sbi->nls_io)

4
fs/fat/namei_msdos.c
View File

@ -544,7 +544,7 @@ static int do_msdos_rename(struct inode *old_dir, unsigned char *old_name,
int start = MSDOS_I(new_dir)->i_logstart;
dotdot_de->start = cpu_to_le16(start);
dotdot_de->starthi = cpu_to_le16(start >> 16);
mark_buffer_dirty(dotdot_bh);
mark_buffer_dirty_inode(dotdot_bh, old_inode);
if (IS_DIRSYNC(new_dir)) {
err = sync_dirty_buffer(dotdot_bh);
if (err)
@ -586,7 +586,7 @@ static int do_msdos_rename(struct inode *old_dir, unsigned char *old_name,
int start = MSDOS_I(old_dir)->i_logstart;
dotdot_de->start = cpu_to_le16(start);
dotdot_de->starthi = cpu_to_le16(start >> 16);
mark_buffer_dirty(dotdot_bh);
mark_buffer_dirty_inode(dotdot_bh, old_inode);
corrupt |= sync_dirty_buffer(dotdot_bh);
}
error_inode:

4
fs/fat/namei_vfat.c
View File

@ -965,7 +965,7 @@ static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
int start = MSDOS_I(new_dir)->i_logstart;
dotdot_de->start = cpu_to_le16(start);
dotdot_de->starthi = cpu_to_le16(start >> 16);
mark_buffer_dirty(dotdot_bh);
mark_buffer_dirty_inode(dotdot_bh, old_inode);
if (IS_DIRSYNC(new_dir)) {
err = sync_dirty_buffer(dotdot_bh);
if (err)
@ -1009,7 +1009,7 @@ static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
int start = MSDOS_I(old_dir)->i_logstart;
dotdot_de->start = cpu_to_le16(start);
dotdot_de->starthi = cpu_to_le16(start >> 16);
mark_buffer_dirty(dotdot_bh);
mark_buffer_dirty_inode(dotdot_bh, old_inode);
corrupt |= sync_dirty_buffer(dotdot_bh);
}
error_inode:

40
fs/file_table.c
View File

@ -214,7 +214,7 @@ int init_file(struct file *file, struct vfsmount *mnt, struct dentry *dentry,
*/
if ((mode & FMODE_WRITE) && !special_file(dentry->d_inode->i_mode)) {
file_take_write(file);
error = mnt_want_write(mnt);
error = mnt_clone_write(mnt);
WARN_ON(error);
}
return error;
@ -399,6 +399,44 @@ int fs_may_remount_ro(struct super_block *sb)
return 0;
}
/**
* mark_files_ro - mark all files read-only
* @sb: superblock in question
*
* All files are marked read-only. We don't care about pending
* delete files so this should be used in 'force' mode only.
*/
void mark_files_ro(struct super_block *sb)
{
struct file *f;
retry:
file_list_lock();
list_for_each_entry(f, &sb->s_files, f_u.fu_list) {
struct vfsmount *mnt;
if (!S_ISREG(f->f_path.dentry->d_inode->i_mode))
continue;
if (!file_count(f))
continue;
if (!(f->f_mode & FMODE_WRITE))
continue;
f->f_mode &= ~FMODE_WRITE;
if (file_check_writeable(f) != 0)
continue;
file_release_write(f);
mnt = mntget(f->f_path.mnt);
file_list_unlock();
/*
* This can sleep, so we can't hold
* the file_list_lock() spinlock.
*/
mnt_drop_write(mnt);
mntput(mnt);
goto retry;
}
file_list_unlock();
}
void __init files_init(unsigned long mempages)
{
int n;

4
fs/freevxfs/vxfs_super.c
View File

@ -80,12 +80,16 @@ vxfs_put_super(struct super_block *sbp)
{
struct vxfs_sb_info *infp = VXFS_SBI(sbp);
lock_kernel();
vxfs_put_fake_inode(infp->vsi_fship);
vxfs_put_fake_inode(infp->vsi_ilist);
vxfs_put_fake_inode(infp->vsi_stilist);
brelse(infp->vsi_bp);
kfree(infp);
unlock_kernel();
}
/**

92
fs/fs-writeback.c
View File

@ -64,6 +64,28 @@ static void writeback_release(struct backing_dev_info *bdi)
clear_bit(BDI_pdflush, &bdi->state);
}
static noinline void block_dump___mark_inode_dirty(struct inode *inode)
{
if (inode->i_ino || strcmp(inode->i_sb->s_id, "bdev")) {
struct dentry *dentry;
const char *name = "?";
dentry = d_find_alias(inode);
if (dentry) {
spin_lock(&dentry->d_lock);
name = (const char *) dentry->d_name.name;
}
printk(KERN_DEBUG
"%s(%d): dirtied inode %lu (%s) on %s\n",
current->comm, task_pid_nr(current), inode->i_ino,
name, inode->i_sb->s_id);
if (dentry) {
spin_unlock(&dentry->d_lock);
dput(dentry);
}
}
}
/**
* __mark_inode_dirty - internal function
* @inode: inode to mark
@ -114,23 +136,8 @@ void __mark_inode_dirty(struct inode *inode, int flags)
if ((inode->i_state & flags) == flags)
return;
if (unlikely(block_dump)) {
struct dentry *dentry = NULL;
const char *name = "?";
if (!list_empty(&inode->i_dentry)) {
dentry = list_entry(inode->i_dentry.next,
struct dentry, d_alias);
if (dentry && dentry->d_name.name)
name = (const char *) dentry->d_name.name;
}
if (inode->i_ino || strcmp(inode->i_sb->s_id, "bdev"))
printk(KERN_DEBUG
"%s(%d): dirtied inode %lu (%s) on %s\n",
current->comm, task_pid_nr(current), inode->i_ino,
name, inode->i_sb->s_id);
}
if (unlikely(block_dump))
block_dump___mark_inode_dirty(inode);
spin_lock(&inode_lock);
if ((inode->i_state & flags) != flags) {
@ -289,7 +296,6 @@ __sync_single_inode(struct inode *inode, struct writeback_control *wbc)
int ret;
BUG_ON(inode->i_state & I_SYNC);
WARN_ON(inode->i_state & I_NEW);
/* Set I_SYNC, reset I_DIRTY */
dirty = inode->i_state & I_DIRTY;
@ -314,7 +320,6 @@ __sync_single_inode(struct inode *inode, struct writeback_control *wbc)
}
spin_lock(&inode_lock);
WARN_ON(inode->i_state & I_NEW);
inode->i_state &= ~I_SYNC;
if (!(inode->i_state & I_FREEING)) {
if (!(inode->i_state & I_DIRTY) &&
@ -678,55 +683,6 @@ void sync_inodes_sb(struct super_block *sb, int wait)
sync_sb_inodes(sb, &wbc);
}
/**
* sync_inodes - writes all inodes to disk
* @wait: wait for completion
*
* sync_inodes() goes through each super block's dirty inode list, writes the
* inodes out, waits on the writeout and puts the inodes back on the normal
* list.
*
* This is for sys_sync(). fsync_dev() uses the same algorithm. The subtle
* part of the sync functions is that the blockdev "superblock" is processed
* last. This is because the write_inode() function of a typical fs will
* perform no I/O, but will mark buffers in the blockdev mapping as dirty.
* What we want to do is to perform all that dirtying first, and then write
* back all those inode blocks via the blockdev mapping in one sweep. So the
* additional (somewhat redundant) sync_blockdev() calls here are to make
* sure that really happens. Because if we call sync_inodes_sb(wait=1) with
* outstanding dirty inodes, the writeback goes block-at-a-time within the
* filesystem's write_inode(). This is extremely slow.
*/
static void __sync_inodes(int wait)
{
struct super_block *sb;
spin_lock(&sb_lock);
restart:
list_for_each_entry(sb, &super_blocks, s_list) {
sb->s_count++;
spin_unlock(&sb_lock);
down_read(&sb->s_umount);
if (sb->s_root) {
sync_inodes_sb(sb, wait);
sync_blockdev(sb->s_bdev);
}
up_read(&sb->s_umount);
spin_lock(&sb_lock);
if (__put_super_and_need_restart(sb))
goto restart;
}
spin_unlock(&sb_lock);
}
void sync_inodes(int wait)
{
__sync_inodes(0);
if (wait)
__sync_inodes(1);
}
/**
* write_inode_now - write an inode to disk
* @inode: inode to write to disk

2
fs/gfs2/log.c
View File

@ -764,7 +764,6 @@ void __gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
}
gfs2_log_unlock(sdp);
sdp->sd_vfs->s_dirt = 0;
up_write(&sdp->sd_log_flush_lock);
kfree(ai);
@ -823,7 +822,6 @@ void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
log_refund(sdp, tr);
buf_lo_incore_commit(sdp, tr);
sdp->sd_vfs->s_dirt = 1;
up_read(&sdp->sd_log_flush_lock);
gfs2_log_lock(sdp);

15
fs/gfs2/super.c
View File

@ -719,6 +719,8 @@ static void gfs2_put_super(struct super_block *sb)
int error;
struct gfs2_jdesc *jd;
lock_kernel();
/* Unfreeze the filesystem, if we need to */
mutex_lock(&sdp->sd_freeze_lock);
@ -785,17 +787,8 @@ static void gfs2_put_super(struct super_block *sb)
/* At this point, we're through participating in the lockspace */
gfs2_sys_fs_del(sdp);
}
/**
* gfs2_write_super
* @sb: the superblock
*
*/
static void gfs2_write_super(struct super_block *sb)
{
sb->s_dirt = 0;
unlock_kernel();
}
/**
@ -807,7 +800,6 @@ static void gfs2_write_super(struct super_block *sb)
static int gfs2_sync_fs(struct super_block *sb, int wait)
{
sb->s_dirt = 0;
if (wait && sb->s_fs_info)
gfs2_log_flush(sb->s_fs_info, NULL);
return 0;
@ -1324,7 +1316,6 @@ const struct super_operations gfs2_super_ops = {
.write_inode = gfs2_write_inode,
.delete_inode = gfs2_delete_inode,
.put_super = gfs2_put_super,
.write_super = gfs2_write_super,
.sync_fs = gfs2_sync_fs,
.freeze_fs = gfs2_freeze,
.unfreeze_fs = gfs2_unfreeze,

23
fs/hfs/super.c
View File

@ -49,11 +49,23 @@ MODULE_LICENSE("GPL");
*/
static void hfs_write_super(struct super_block *sb)
{
lock_super(sb);
sb->s_dirt = 0;
if (sb->s_flags & MS_RDONLY)
return;
/* sync everything to the buffers */
if (!(sb->s_flags & MS_RDONLY))
hfs_mdb_commit(sb);
unlock_super(sb);
}
static int hfs_sync_fs(struct super_block *sb, int wait)
{
lock_super(sb);
hfs_mdb_commit(sb);
sb->s_dirt = 0;
unlock_super(sb);
return 0;
}
/*
@ -65,9 +77,15 @@ static void hfs_write_super(struct super_block *sb)
*/
static void hfs_put_super(struct super_block *sb)
{
lock_kernel();
if (sb->s_dirt)
hfs_write_super(sb);
hfs_mdb_close(sb);
/* release the MDB's resources */
hfs_mdb_put(sb);
unlock_kernel();
}
/*
@ -164,6 +182,7 @@ static const struct super_operations hfs_super_operations = {
.clear_inode = hfs_clear_inode,
.put_super = hfs_put_super,
.write_super = hfs_write_super,
.sync_fs = hfs_sync_fs,
.statfs = hfs_statfs,
.remount_fs = hfs_remount,
.show_options = hfs_show_options,

25
fs/hfsplus/super.c
View File

@ -152,15 +152,14 @@ static void hfsplus_clear_inode(struct inode *inode)
}
}
static void hfsplus_write_super(struct super_block *sb)
static int hfsplus_sync_fs(struct super_block *sb, int wait)
{
struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
dprint(DBG_SUPER, "hfsplus_write_super\n");
lock_super(sb);
sb->s_dirt = 0;
if (sb->s_flags & MS_RDONLY)
/* warn? */
return;
vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
@ -192,6 +191,16 @@ static void hfsplus_write_super(struct super_block *sb)
}
HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
}
unlock_super(sb);
return 0;
}
static void hfsplus_write_super(struct super_block *sb)
{
if (!(sb->s_flags & MS_RDONLY))
hfsplus_sync_fs(sb, 1);
else
sb->s_dirt = 0;
}
static void hfsplus_put_super(struct super_block *sb)
@ -199,6 +208,11 @@ static void hfsplus_put_super(struct super_block *sb)
dprint(DBG_SUPER, "hfsplus_put_super\n");
if (!sb->s_fs_info)
return;
lock_kernel();
if (sb->s_dirt)
hfsplus_write_super(sb);
if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
@ -218,6 +232,8 @@ static void hfsplus_put_super(struct super_block *sb)
unload_nls(HFSPLUS_SB(sb).nls);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
unlock_kernel();
}
static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
@ -279,6 +295,7 @@ static const struct super_operations hfsplus_sops = {
.clear_inode = hfsplus_clear_inode,
.put_super = hfsplus_put_super,
.write_super = hfsplus_write_super,
.sync_fs = hfsplus_sync_fs,
.statfs = hfsplus_statfs,
.remount_fs = hfsplus_remount,
.show_options = hfsplus_show_options,

12
fs/hpfs/super.c
View File

@ -13,6 +13,7 @@
#include <linux/statfs.h>
#include <linux/magic.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
/* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
@ -99,11 +100,16 @@ int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
static void hpfs_put_super(struct super_block *s)
{
struct hpfs_sb_info *sbi = hpfs_sb(s);
lock_kernel();
kfree(sbi->sb_cp_table);
kfree(sbi->sb_bmp_dir);
unmark_dirty(s);
s->s_fs_info = NULL;
kfree(sbi);
unlock_kernel();
}
unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
@ -393,6 +399,8 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
*flags |= MS_NOATIME;
lock_kernel();
lock_super(s);
uid = sbi->sb_uid; gid = sbi->sb_gid;
umask = 0777 & ~sbi->sb_mode;
lowercase = sbi->sb_lowercase; conv = sbi->sb_conv;
@ -425,9 +433,13 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
replace_mount_options(s, new_opts);
unlock_super(s);
unlock_kernel();
return 0;
out_err:
unlock_super(s);
unlock_kernel();
kfree(new_opts);
return -EINVAL;
}

2
fs/inode.c
View File

@ -1422,7 +1422,7 @@ void file_update_time(struct file *file)
if (IS_NOCMTIME(inode))
return;
err = mnt_want_write(file->f_path.mnt);
err = mnt_want_write_file(file);
if (err)
return;

17
fs/internal.h
View File

@ -25,6 +25,8 @@ static inline int sb_is_blkdev_sb(struct super_block *sb)
return sb == blockdev_superblock;
}
extern int __sync_blockdev(struct block_device *bdev, int wait);
#else
static inline void bdev_cache_init(void)
{
@ -34,6 +36,11 @@ static inline int sb_is_blkdev_sb(struct super_block *sb)
{
return 0;
}
static inline int __sync_blockdev(struct block_device *bdev, int wait)
{
return 0;
}
#endif
/*
@ -66,3 +73,13 @@ extern void __init mnt_init(void);
* fs_struct.c
*/
extern void chroot_fs_refs(struct path *, struct path *);
/*
* file_table.c
*/
extern void mark_files_ro(struct super_block *);
/*
* super.c
*/
extern int do_remount_sb(struct super_block *, int, void *, int);

5
fs/isofs/inode.c
View File

@ -42,11 +42,16 @@ static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qst
static void isofs_put_super(struct super_block *sb)
{
struct isofs_sb_info *sbi = ISOFS_SB(sb);
#ifdef CONFIG_JOLIET
lock_kernel();
if (sbi->s_nls_iocharset) {
unload_nls(sbi->s_nls_iocharset);
sbi->s_nls_iocharset = NULL;
}
unlock_kernel();
#endif
kfree(sbi);

18
fs/jffs2/fs.c
View File

@ -20,6 +20,7 @@
#include <linux/vmalloc.h>
#include <linux/vfs.h>
#include <linux/crc32.h>
#include <linux/smp_lock.h>
#include "nodelist.h"
static int jffs2_flash_setup(struct jffs2_sb_info *c);
@ -387,6 +388,7 @@ int jffs2_remount_fs (struct super_block *sb, int *flags, char *data)
This also catches the case where it was stopped and this
is just a remount to restart it.
Flush the writebuffer, if neccecary, else we loose it */
lock_kernel();
if (!(sb->s_flags & MS_RDONLY)) {
jffs2_stop_garbage_collect_thread(c);
mutex_lock(&c->alloc_sem);
@ -399,24 +401,10 @@ int jffs2_remount_fs (struct super_block *sb, int *flags, char *data)
*flags |= MS_NOATIME;
unlock_kernel();
return 0;
}
void jffs2_write_super (struct super_block *sb)
{
struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
sb->s_dirt = 0;
if (sb->s_flags & MS_RDONLY)
return;
D1(printk(KERN_DEBUG "jffs2_write_super()\n"));
jffs2_garbage_collect_trigger(c);
jffs2_erase_pending_blocks(c, 0);
jffs2_flush_wbuf_gc(c, 0);
}
/* jffs2_new_inode: allocate a new inode and inocache, add it to the hash,
fill in the raw_inode while you're at it. */
struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_inode *ri)

1
fs/jffs2/os-linux.h
View File

@ -181,7 +181,6 @@ void jffs2_dirty_inode(struct inode *inode);
struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
struct jffs2_raw_inode *ri);
int jffs2_statfs (struct dentry *, struct kstatfs *);
void jffs2_write_super (struct super_block *);
int jffs2_remount_fs (struct super_block *, int *, char *);
int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
void jffs2_gc_release_inode(struct jffs2_sb_info *c,

26
fs/jffs2/super.c
View File

@ -53,10 +53,29 @@ static void jffs2_i_init_once(void *foo)
inode_init_once(&f->vfs_inode);
}
static void jffs2_write_super(struct super_block *sb)
{
struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
lock_super(sb);
sb->s_dirt = 0;
if (!(sb->s_flags & MS_RDONLY)) {
D1(printk(KERN_DEBUG "jffs2_write_super()\n"));
jffs2_garbage_collect_trigger(c);
jffs2_erase_pending_blocks(c, 0);
jffs2_flush_wbuf_gc(c, 0);
}
unlock_super(sb);
}
static int jffs2_sync_fs(struct super_block *sb, int wait)
{
struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
jffs2_write_super(sb);
mutex_lock(&c->alloc_sem);
jffs2_flush_wbuf_pad(c);
mutex_unlock(&c->alloc_sem);
@ -174,6 +193,11 @@ static void jffs2_put_super (struct super_block *sb)
D2(printk(KERN_DEBUG "jffs2: jffs2_put_super()\n"));
lock_kernel();
if (sb->s_dirt)
jffs2_write_super(sb);
mutex_lock(&c->alloc_sem);
jffs2_flush_wbuf_pad(c);
mutex_unlock(&c->alloc_sem);
@ -192,6 +216,8 @@ static void jffs2_put_super (struct super_block *sb)
if (c->mtd->sync)
c->mtd->sync(c->mtd);
unlock_kernel();
D1(printk(KERN_DEBUG "jffs2_put_super returning\n"));
}

27
fs/jfs/super.c
View File

@ -32,6 +32,7 @@
#include <linux/crc32.h>
#include <asm/uaccess.h>
#include <linux/seq_file.h>
#include <linux/smp_lock.h>
#include "jfs_incore.h"
#include "jfs_filsys.h"
@ -183,6 +184,9 @@ static void jfs_put_super(struct super_block *sb)
int rc;
jfs_info("In jfs_put_super");
lock_kernel();
rc = jfs_umount(sb);
if (rc)
jfs_err("jfs_umount failed with return code %d", rc);
@ -195,6 +199,8 @@ static void jfs_put_super(struct super_block *sb)
sbi->direct_inode = NULL;
kfree(sbi);
unlock_kernel();
}
enum {
@ -370,19 +376,24 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
s64 newLVSize = 0;
int rc = 0;
int flag = JFS_SBI(sb)->flag;
int ret;
if (!parse_options(data, sb, &newLVSize, &flag)) {
return -EINVAL;
}
lock_kernel();
if (newLVSize) {
if (sb->s_flags & MS_RDONLY) {
printk(KERN_ERR
"JFS: resize requires volume to be mounted read-write\n");
unlock_kernel();
return -EROFS;
}
rc = jfs_extendfs(sb, newLVSize, 0);
if (rc)
if (rc) {
unlock_kernel();
return rc;
}
}
if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
@ -393,23 +404,31 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
JFS_SBI(sb)->flag = flag;
return jfs_mount_rw(sb, 1);
ret = jfs_mount_rw(sb, 1);
unlock_kernel();
return ret;
}
if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
rc = jfs_umount_rw(sb);
JFS_SBI(sb)->flag = flag;
unlock_kernel();
return rc;
}
if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
if (!(sb->s_flags & MS_RDONLY)) {
rc = jfs_umount_rw(sb);
if (rc)
if (rc) {
unlock_kernel();
return rc;
}
JFS_SBI(sb)->flag = flag;
return jfs_mount_rw(sb, 1);
ret = jfs_mount_rw(sb, 1);
unlock_kernel();
return ret;
}
JFS_SBI(sb)->flag = flag;
unlock_kernel();
return 0;
}

25
fs/libfs.c
View File

@ -9,6 +9,8 @@
#include <linux/vfs.h>
#include <linux/mutex.h>
#include <linux/exportfs.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
#include <asm/uaccess.h>
@ -807,6 +809,29 @@ struct dentry *generic_fh_to_parent(struct super_block *sb, struct fid *fid,
}
EXPORT_SYMBOL_GPL(generic_fh_to_parent);
int simple_fsync(struct file *file, struct dentry *dentry, int datasync)
{
struct writeback_control wbc = {
.sync_mode = WB_SYNC_ALL,
.nr_to_write = 0, /* metadata-only; caller takes care of data */
};
struct inode *inode = dentry->d_inode;
int err;
int ret;
ret = sync_mapping_buffers(inode->i_mapping);
if (!(inode->i_state & I_DIRTY))
return ret;
if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
return ret;
err = sync_inode(inode, &wbc);
if (ret == 0)
ret = err;
return ret;
}
EXPORT_SYMBOL(simple_fsync);
EXPORT_SYMBOL(dcache_dir_close);
EXPORT_SYMBOL(dcache_dir_lseek);
EXPORT_SYMBOL(dcache_dir_open);

2
fs/minix/dir.c
View File

@ -22,7 +22,7 @@ static int minix_readdir(struct file *, void *, filldir_t);
const struct file_operations minix_dir_operations = {
.read = generic_read_dir,
.readdir = minix_readdir,
.fsync = minix_sync_file,
.fsync = simple_fsync,
};
static inline void dir_put_page(struct page *page)

20
fs/minix/file.c
View File

@ -6,15 +6,12 @@
* minix regular file handling primitives
*/
#include <linux/buffer_head.h> /* for fsync_inode_buffers() */
#include "minix.h"
/*
* We have mostly NULLs here: the current defaults are OK for
* the minix filesystem.
*/
int minix_sync_file(struct file *, struct dentry *, int);
const struct file_operations minix_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,
@ -22,7 +19,7 @@ const struct file_operations minix_file_operations = {
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.fsync = minix_sync_file,
.fsync = simple_fsync,
.splice_read = generic_file_splice_read,
};
@ -30,18 +27,3 @@ const struct inode_operations minix_file_inode_operations = {
.truncate = minix_truncate,
.getattr = minix_getattr,
};
int minix_sync_file(struct file * file, struct dentry *dentry, int datasync)
{
struct inode *inode = dentry->d_inode;
int err;
err = sync_mapping_buffers(inode->i_mapping);
if (!(inode->i_state & I_DIRTY))
return err;
if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
return err;
err |= minix_sync_inode(inode);
return err ? -EIO : 0;
}

37
fs/minix/inode.c
View File

@ -35,6 +35,8 @@ static void minix_put_super(struct super_block *sb)
int i;
struct minix_sb_info *sbi = minix_sb(sb);
lock_kernel();
if (!(sb->s_flags & MS_RDONLY)) {
if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
sbi->s_ms->s_state = sbi->s_mount_state;
@ -49,7 +51,7 @@ static void minix_put_super(struct super_block *sb)
sb->s_fs_info = NULL;
kfree(sbi);
return;
unlock_kernel();
}
static struct kmem_cache * minix_inode_cachep;
@ -554,38 +556,25 @@ static struct buffer_head * V2_minix_update_inode(struct inode * inode)
return bh;
}
static struct buffer_head *minix_update_inode(struct inode *inode)
{
if (INODE_VERSION(inode) == MINIX_V1)
return V1_minix_update_inode(inode);
else
return V2_minix_update_inode(inode);
}
static int minix_write_inode(struct inode * inode, int wait)
{
brelse(minix_update_inode(inode));
return 0;
}
int minix_sync_inode(struct inode * inode)
static int minix_write_inode(struct inode *inode, int wait)
{
int err = 0;
struct buffer_head *bh;
bh = minix_update_inode(inode);
if (bh && buffer_dirty(bh))
{
if (INODE_VERSION(inode) == MINIX_V1)
bh = V1_minix_update_inode(inode);
else
bh = V2_minix_update_inode(inode);
if (!bh)
return -EIO;
if (wait && buffer_dirty(bh)) {
sync_dirty_buffer(bh);
if (buffer_req(bh) && !buffer_uptodate(bh))
{
if (buffer_req(bh) && !buffer_uptodate(bh)) {
printk("IO error syncing minix inode [%s:%08lx]\n",
inode->i_sb->s_id, inode->i_ino);
err = -1;
err = -EIO;
}
}
else if (!bh)
err = -1;
brelse (bh);
return err;
}

2
fs/minix/minix.h
View File

@ -57,7 +57,6 @@ extern int __minix_write_begin(struct file *file, struct address_space *mapping,
extern void V1_minix_truncate(struct inode *);
extern void V2_minix_truncate(struct inode *);
extern void minix_truncate(struct inode *);
extern int minix_sync_inode(struct inode *);
extern void minix_set_inode(struct inode *, dev_t);
extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
@ -72,7 +71,6 @@ extern int minix_empty_dir(struct inode*);
extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
extern ino_t minix_inode_by_name(struct dentry*);
extern int minix_sync_file(struct file *, struct dentry *, int);
extern const struct inode_operations minix_file_inode_operations;
extern const struct inode_operations minix_dir_inode_operations;

133
fs/namei.c
View File

@ -552,6 +552,17 @@ static __always_inline int link_path_walk(const char *name, struct nameidata *nd
return result;
}
static __always_inline void set_root(struct nameidata *nd)
{
if (!nd->root.mnt) {
struct fs_struct *fs = current->fs;
read_lock(&fs->lock);
nd->root = fs->root;
path_get(&nd->root);
read_unlock(&fs->lock);
}
}
static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *link)
{
int res = 0;
@ -560,14 +571,10 @@ static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *l
goto fail;
if (*link == '/') {
struct fs_struct *fs = current->fs;
set_root(nd);
path_put(&nd->path);
read_lock(&fs->lock);
nd->path = fs->root;
path_get(&fs->root);
read_unlock(&fs->lock);
nd->path = nd->root;
path_get(&nd->root);
}
res = link_path_walk(link, nd);
@ -668,23 +675,23 @@ static inline int do_follow_link(struct path *path, struct nameidata *nd)
return err;
}
int follow_up(struct vfsmount **mnt, struct dentry **dentry)
int follow_up(struct path *path)
{
struct vfsmount *parent;
struct dentry *mountpoint;
spin_lock(&vfsmount_lock);
parent=(*mnt)->mnt_parent;
if (parent == *mnt) {
parent = path->mnt->mnt_parent;
if (parent == path->mnt) {
spin_unlock(&vfsmount_lock);
return 0;
}
mntget(parent);
mountpoint=dget((*mnt)->mnt_mountpoint);
mountpoint = dget(path->mnt->mnt_mountpoint);
spin_unlock(&vfsmount_lock);
dput(*dentry);
*dentry = mountpoint;
mntput(*mnt);
*mnt = parent;
dput(path->dentry);
path->dentry = mountpoint;
mntput(path->mnt);
path->mnt = parent;
return 1;
}
@ -695,7 +702,7 @@ static int __follow_mount(struct path *path)
{
int res = 0;
while (d_mountpoint(path->dentry)) {
struct vfsmount *mounted = lookup_mnt(path->mnt, path->dentry);
struct vfsmount *mounted = lookup_mnt(path);
if (!mounted)
break;
dput(path->dentry);
@ -708,32 +715,32 @@ static int __follow_mount(struct path *path)
return res;
}
static void follow_mount(struct vfsmount **mnt, struct dentry **dentry)
static void follow_mount(struct path *path)
{
while (d_mountpoint(*dentry)) {
struct vfsmount *mounted = lookup_mnt(*mnt, *dentry);
while (d_mountpoint(path->dentry)) {
struct vfsmount *mounted = lookup_mnt(path);
if (!mounted)
break;
dput(*dentry);
mntput(*mnt);
*mnt = mounted;
*dentry = dget(mounted->mnt_root);
dput(path->dentry);
mntput(path->mnt);
path->mnt = mounted;
path->dentry = dget(mounted->mnt_root);
}
}
/* no need for dcache_lock, as serialization is taken care in
* namespace.c
*/
int follow_down(struct vfsmount **mnt, struct dentry **dentry)
int follow_down(struct path *path)
{
struct vfsmount *mounted;
mounted = lookup_mnt(*mnt, *dentry);
mounted = lookup_mnt(path);
if (mounted) {
dput(*dentry);
mntput(*mnt);
*mnt = mounted;
*dentry = dget(mounted->mnt_root);
dput(path->dentry);
mntput(path->mnt);
path->mnt = mounted;
path->dentry = dget(mounted->mnt_root);
return 1;
}
return 0;
@ -741,19 +748,16 @@ int follow_down(struct vfsmount **mnt, struct dentry **dentry)
static __always_inline void follow_dotdot(struct nameidata *nd)
{
struct fs_struct *fs = current->fs;
set_root(nd);
while(1) {
struct vfsmount *parent;
struct dentry *old = nd->path.dentry;
read_lock(&fs->lock);
if (nd->path.dentry == fs->root.dentry &&
nd->path.mnt == fs->root.mnt) {
read_unlock(&fs->lock);
if (nd->path.dentry == nd->root.dentry &&
nd->path.mnt == nd->root.mnt) {
break;
}
read_unlock(&fs->lock);
spin_lock(&dcache_lock);
if (nd->path.dentry != nd->path.mnt->mnt_root) {
nd->path.dentry = dget(nd->path.dentry->d_parent);
@ -775,7 +779,7 @@ static __always_inline void follow_dotdot(struct nameidata *nd)
mntput(nd->path.mnt);
nd->path.mnt = parent;
}
follow_mount(&nd->path.mnt, &nd->path.dentry);
follow_mount(&nd->path);
}
/*
@ -1017,25 +1021,23 @@ static int path_walk(const char *name, struct nameidata *nd)
return link_path_walk(name, nd);
}
/* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
static int do_path_lookup(int dfd, const char *name,
unsigned int flags, struct nameidata *nd)
static int path_init(int dfd, const char *name, unsigned int flags, struct nameidata *nd)
{
int retval = 0;
int fput_needed;
struct file *file;
struct fs_struct *fs = current->fs;
nd->last_type = LAST_ROOT; /* if there are only slashes... */
nd->flags = flags;
nd->depth = 0;
nd->root.mnt = NULL;
if (*name=='/') {
read_lock(&fs->lock);
nd->path = fs->root;
path_get(&fs->root);
read_unlock(&fs->lock);
set_root(nd);
nd->path = nd->root;
path_get(&nd->root);
} else if (dfd == AT_FDCWD) {
struct fs_struct *fs = current->fs;
read_lock(&fs->lock);
nd->path = fs->pwd;
path_get(&fs->pwd);
@ -1063,17 +1065,29 @@ static int do_path_lookup(int dfd, const char *name,
fput_light(file, fput_needed);
}
retval = path_walk(name, nd);
if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
nd->path.dentry->d_inode))
audit_inode(name, nd->path.dentry);
out_fail:
return retval;
return 0;
fput_fail:
fput_light(file, fput_needed);
goto out_fail;
out_fail:
return retval;
}
/* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
static int do_path_lookup(int dfd, const char *name,
unsigned int flags, struct nameidata *nd)
{
int retval = path_init(dfd, name, flags, nd);
if (!retval)
retval = path_walk(name, nd);
if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
nd->path.dentry->d_inode))
audit_inode(name, nd->path.dentry);
if (nd->root.mnt) {
path_put(&nd->root);
nd->root.mnt = NULL;
}
return retval;
}
int path_lookup(const char *name, unsigned int flags,
@ -1113,14 +1127,18 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt,
nd->path.dentry = dentry;
nd->path.mnt = mnt;
path_get(&nd->path);
nd->root = nd->path;
path_get(&nd->root);
retval = path_walk(name, nd);
if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
nd->path.dentry->d_inode))
audit_inode(name, nd->path.dentry);
return retval;
path_put(&nd->root);
nd->root.mnt = NULL;
return retval;
}
/**
@ -1676,9 +1694,14 @@ struct file *do_filp_open(int dfd, const char *pathname,
/*
* Create - we need to know the parent.
*/
error = do_path_lookup(dfd, pathname, LOOKUP_PARENT, &nd);
error = path_init(dfd, pathname, LOOKUP_PARENT, &nd);
if (error)
return ERR_PTR(error);
error = path_walk(pathname, &nd);
if (error)
return ERR_PTR(error);
if (unlikely(!audit_dummy_context()))
audit_inode(pathname, nd.path.dentry);
/*
* We have the parent and last component. First of all, check
@ -1806,6 +1829,8 @@ struct file *do_filp_open(int dfd, const char *pathname,
if (!IS_ERR(nd.intent.open.file))
release_open_intent(&nd);
exit_parent:
if (nd.root.mnt)
path_put(&nd.root);
path_put(&nd.path);
return ERR_PTR(error);

339
fs/namespace.c
View File

@ -131,10 +131,20 @@ struct vfsmount *alloc_vfsmnt(const char *name)
INIT_LIST_HEAD(&mnt->mnt_share);
INIT_LIST_HEAD(&mnt->mnt_slave_list);
INIT_LIST_HEAD(&mnt->mnt_slave);
atomic_set(&mnt->__mnt_writers, 0);
#ifdef CONFIG_SMP
mnt->mnt_writers = alloc_percpu(int);
if (!mnt->mnt_writers)
goto out_free_devname;
#else
mnt->mnt_writers = 0;
#endif
}
return mnt;
#ifdef CONFIG_SMP
out_free_devname:
kfree(mnt->mnt_devname);
#endif
out_free_id:
mnt_free_id(mnt);
out_free_cache:
@ -171,65 +181,38 @@ int __mnt_is_readonly(struct vfsmount *mnt)
}
EXPORT_SYMBOL_GPL(__mnt_is_readonly);
struct mnt_writer {
/*
* If holding multiple instances of this lock, they
* must be ordered by cpu number.
*/
spinlock_t lock;
struct lock_class_key lock_class; /* compiles out with !lockdep */
unsigned long count;
struct vfsmount *mnt;
} ____cacheline_aligned_in_smp;
static DEFINE_PER_CPU(struct mnt_writer, mnt_writers);
static int __init init_mnt_writers(void)
static inline void inc_mnt_writers(struct vfsmount *mnt)
{
int cpu;
for_each_possible_cpu(cpu) {
struct mnt_writer *writer = &per_cpu(mnt_writers, cpu);
spin_lock_init(&writer->lock);
lockdep_set_class(&writer->lock, &writer->lock_class);
writer->count = 0;
}
return 0;
#ifdef CONFIG_SMP
(*per_cpu_ptr(mnt->mnt_writers, smp_processor_id()))++;
#else
mnt->mnt_writers++;
#endif
}
fs_initcall(init_mnt_writers);
static void unlock_mnt_writers(void)
static inline void dec_mnt_writers(struct vfsmount *mnt)
{
#ifdef CONFIG_SMP
(*per_cpu_ptr(mnt->mnt_writers, smp_processor_id()))--;
#else
mnt->mnt_writers--;
#endif
}
static unsigned int count_mnt_writers(struct vfsmount *mnt)
{
#ifdef CONFIG_SMP
unsigned int count = 0;
int cpu;
struct mnt_writer *cpu_writer;
for_each_possible_cpu(cpu) {
cpu_writer = &per_cpu(mnt_writers, cpu);
spin_unlock(&cpu_writer->lock);
count += *per_cpu_ptr(mnt->mnt_writers, cpu);
}
}
static inline void __clear_mnt_count(struct mnt_writer *cpu_writer)
{
if (!cpu_writer->mnt)
return;
/*
* This is in case anyone ever leaves an invalid,
* old ->mnt and a count of 0.
*/
if (!cpu_writer->count)
return;
atomic_add(cpu_writer->count, &cpu_writer->mnt->__mnt_writers);
cpu_writer->count = 0;
}
/*
* must hold cpu_writer->lock
*/
static inline void use_cpu_writer_for_mount(struct mnt_writer *cpu_writer,
struct vfsmount *mnt)
{
if (cpu_writer->mnt == mnt)
return;
__clear_mnt_count(cpu_writer);
cpu_writer->mnt = mnt;
return count;
#else
return mnt->mnt_writers;
#endif
}
/*
@ -253,74 +236,73 @@ static inline void use_cpu_writer_for_mount(struct mnt_writer *cpu_writer,
int mnt_want_write(struct vfsmount *mnt)
{
int ret = 0;
struct mnt_writer *cpu_writer;
cpu_writer = &get_cpu_var(mnt_writers);
spin_lock(&cpu_writer->lock);
preempt_disable();
inc_mnt_writers(mnt);
/*
* The store to inc_mnt_writers must be visible before we pass
* MNT_WRITE_HOLD loop below, so that the slowpath can see our
* incremented count after it has set MNT_WRITE_HOLD.
*/
smp_mb();
while (mnt->mnt_flags & MNT_WRITE_HOLD)
cpu_relax();
/*
* After the slowpath clears MNT_WRITE_HOLD, mnt_is_readonly will
* be set to match its requirements. So we must not load that until
* MNT_WRITE_HOLD is cleared.
*/
smp_rmb();
if (__mnt_is_readonly(mnt)) {
dec_mnt_writers(mnt);
ret = -EROFS;
goto out;
}
use_cpu_writer_for_mount(cpu_writer, mnt);
cpu_writer->count++;
out:
spin_unlock(&cpu_writer->lock);
put_cpu_var(mnt_writers);
preempt_enable();
return ret;
}
EXPORT_SYMBOL_GPL(mnt_want_write);
static void lock_mnt_writers(void)
{
int cpu;
struct mnt_writer *cpu_writer;
for_each_possible_cpu(cpu) {
cpu_writer = &per_cpu(mnt_writers, cpu);
spin_lock(&cpu_writer->lock);
__clear_mnt_count(cpu_writer);
cpu_writer->mnt = NULL;
}
}
/*
* These per-cpu write counts are not guaranteed to have
* matched increments and decrements on any given cpu.
* A file open()ed for write on one cpu and close()d on
* another cpu will imbalance this count. Make sure it
* does not get too far out of whack.
/**
* mnt_clone_write - get write access to a mount
* @mnt: the mount on which to take a write
*
* This is effectively like mnt_want_write, except
* it must only be used to take an extra write reference
* on a mountpoint that we already know has a write reference
* on it. This allows some optimisation.
*
* After finished, mnt_drop_write must be called as usual to
* drop the reference.
*/
static void handle_write_count_underflow(struct vfsmount *mnt)
int mnt_clone_write(struct vfsmount *mnt)
{
if (atomic_read(&mnt->__mnt_writers) >=
MNT_WRITER_UNDERFLOW_LIMIT)
return;
/*
* It isn't necessary to hold all of the locks
* at the same time, but doing it this way makes
* us share a lot more code.
*/
lock_mnt_writers();
/*
* vfsmount_lock is for mnt_flags.
*/
spin_lock(&vfsmount_lock);
/*
* If coalescing the per-cpu writer counts did not
* get us back to a positive writer count, we have
* a bug.
*/
if ((atomic_read(&mnt->__mnt_writers) < 0) &&
!(mnt->mnt_flags & MNT_IMBALANCED_WRITE_COUNT)) {
WARN(1, KERN_DEBUG "leak detected on mount(%p) writers "
"count: %d\n",
mnt, atomic_read(&mnt->__mnt_writers));
/* use the flag to keep the dmesg spam down */
mnt->mnt_flags |= MNT_IMBALANCED_WRITE_COUNT;
}
spin_unlock(&vfsmount_lock);
unlock_mnt_writers();
/* superblock may be r/o */
if (__mnt_is_readonly(mnt))
return -EROFS;
preempt_disable();
inc_mnt_writers(mnt);
preempt_enable();
return 0;
}
EXPORT_SYMBOL_GPL(mnt_clone_write);
/**
* mnt_want_write_file - get write access to a file's mount
* @file: the file who's mount on which to take a write
*
* This is like mnt_want_write, but it takes a file and can
* do some optimisations if the file is open for write already
*/
int mnt_want_write_file(struct file *file)
{
if (!(file->f_mode & FMODE_WRITE))
return mnt_want_write(file->f_path.mnt);
else
return mnt_clone_write(file->f_path.mnt);
}
EXPORT_SYMBOL_GPL(mnt_want_write_file);
/**
* mnt_drop_write - give up write access to a mount
@ -332,37 +314,9 @@ static void handle_write_count_underflow(struct vfsmount *mnt)
*/
void mnt_drop_write(struct vfsmount *mnt)
{
int must_check_underflow = 0;
struct mnt_writer *cpu_writer;
cpu_writer = &get_cpu_var(mnt_writers);
spin_lock(&cpu_writer->lock);
use_cpu_writer_for_mount(cpu_writer, mnt);
if (cpu_writer->count > 0) {
cpu_writer->count--;
} else {
must_check_underflow = 1;
atomic_dec(&mnt->__mnt_writers);
}
spin_unlock(&cpu_writer->lock);
/*
* Logically, we could call this each time,
* but the __mnt_writers cacheline tends to
* be cold, and makes this expensive.
*/
if (must_check_underflow)
handle_write_count_underflow(mnt);
/*
* This could be done right after the spinlock
* is taken because the spinlock keeps us on
* the cpu, and disables preemption. However,
* putting it here bounds the amount that
* __mnt_writers can underflow. Without it,
* we could theoretically wrap __mnt_writers.
*/
put_cpu_var(mnt_writers);
preempt_disable();
dec_mnt_writers(mnt);
preempt_enable();
}
EXPORT_SYMBOL_GPL(mnt_drop_write);
@ -370,24 +324,41 @@ static int mnt_make_readonly(struct vfsmount *mnt)
{
int ret = 0;
lock_mnt_writers();
/*
* With all the locks held, this value is stable
*/
if (atomic_read(&mnt->__mnt_writers) > 0) {
ret = -EBUSY;
goto out;
}
/*
* nobody can do a successful mnt_want_write() with all
* of the counts in MNT_DENIED_WRITE and the locks held.
*/
spin_lock(&vfsmount_lock);
if (!ret)
mnt->mnt_flags |= MNT_WRITE_HOLD;
/*
* After storing MNT_WRITE_HOLD, we'll read the counters. This store
* should be visible before we do.
*/
smp_mb();
/*
* With writers on hold, if this value is zero, then there are
* definitely no active writers (although held writers may subsequently
* increment the count, they'll have to wait, and decrement it after
* seeing MNT_READONLY).
*
* It is OK to have counter incremented on one CPU and decremented on
* another: the sum will add up correctly. The danger would be when we
* sum up each counter, if we read a counter before it is incremented,
* but then read another CPU's count which it has been subsequently
* decremented from -- we would see more decrements than we should.
* MNT_WRITE_HOLD protects against this scenario, because
* mnt_want_write first increments count, then smp_mb, then spins on
* MNT_WRITE_HOLD, so it can't be decremented by another CPU while
* we're counting up here.
*/
if (count_mnt_writers(mnt) > 0)
ret = -EBUSY;
else
mnt->mnt_flags |= MNT_READONLY;
/*
* MNT_READONLY must become visible before ~MNT_WRITE_HOLD, so writers
* that become unheld will see MNT_READONLY.
*/
smp_wmb();
mnt->mnt_flags &= ~MNT_WRITE_HOLD;
spin_unlock(&vfsmount_lock);
out:
unlock_mnt_writers();
return ret;
}
@ -410,6 +381,9 @@ void free_vfsmnt(struct vfsmount *mnt)
{
kfree(mnt->mnt_devname);
mnt_free_id(mnt);
#ifdef CONFIG_SMP
free_percpu(mnt->mnt_writers);
#endif
kmem_cache_free(mnt_cache, mnt);
}
@ -442,11 +416,11 @@ struct vfsmount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry,
* lookup_mnt increments the ref count before returning
* the vfsmount struct.
*/
struct vfsmount *lookup_mnt(struct vfsmount *mnt, struct dentry *dentry)
struct vfsmount *lookup_mnt(struct path *path)
{
struct vfsmount *child_mnt;
spin_lock(&vfsmount_lock);
if ((child_mnt = __lookup_mnt(mnt, dentry, 1)))
if ((child_mnt = __lookup_mnt(path->mnt, path->dentry, 1)))
mntget(child_mnt);
spin_unlock(&vfsmount_lock);
return child_mnt;
@ -604,38 +578,18 @@ static struct vfsmount *clone_mnt(struct vfsmount *old, struct dentry *root,
static inline void __mntput(struct vfsmount *mnt)
{
int cpu;
struct super_block *sb = mnt->mnt_sb;
/*
* We don't have to hold all of the locks at the
* same time here because we know that we're the
* last reference to mnt and that no new writers
* can come in.
*/
for_each_possible_cpu(cpu) {
struct mnt_writer *cpu_writer = &per_cpu(mnt_writers, cpu);
spin_lock(&cpu_writer->lock);
if (cpu_writer->mnt != mnt) {
spin_unlock(&cpu_writer->lock);
continue;
}
atomic_add(cpu_writer->count, &mnt->__mnt_writers);
cpu_writer->count = 0;
/*
* Might as well do this so that no one
* ever sees the pointer and expects
* it to be valid.
*/
cpu_writer->mnt = NULL;
spin_unlock(&cpu_writer->lock);
}
/*
* This probably indicates that somebody messed
* up a mnt_want/drop_write() pair. If this
* happens, the filesystem was probably unable
* to make r/w->r/o transitions.
*/
WARN_ON(atomic_read(&mnt->__mnt_writers));
/*
* atomic_dec_and_lock() used to deal with ->mnt_count decrements
* provides barriers, so count_mnt_writers() below is safe. AV
*/
WARN_ON(count_mnt_writers(mnt));
dput(mnt->mnt_root);
free_vfsmnt(mnt);
deactivate_super(sb);
@ -1106,11 +1060,8 @@ static int do_umount(struct vfsmount *mnt, int flags)
* we just try to remount it readonly.
*/
down_write(&sb->s_umount);
if (!(sb->s_flags & MS_RDONLY)) {
lock_kernel();
if (!(sb->s_flags & MS_RDONLY))
retval = do_remount_sb(sb, MS_RDONLY, NULL, 0);
unlock_kernel();
}
up_write(&sb->s_umount);
return retval;
}
@ -1253,11 +1204,11 @@ struct vfsmount *copy_tree(struct vfsmount *mnt, struct dentry *dentry,
return NULL;
}
struct vfsmount *collect_mounts(struct vfsmount *mnt, struct dentry *dentry)
struct vfsmount *collect_mounts(struct path *path)
{
struct vfsmount *tree;
down_write(&namespace_sem);
tree = copy_tree(mnt, dentry, CL_COPY_ALL | CL_PRIVATE);
tree = copy_tree(path->mnt, path->dentry, CL_COPY_ALL | CL_PRIVATE);
up_write(&namespace_sem);
return tree;
}
@ -1430,7 +1381,7 @@ static int graft_tree(struct vfsmount *mnt, struct path *path)
goto out_unlock;
err = -ENOENT;
if (IS_ROOT(path->dentry) || !d_unhashed(path->dentry))
if (!d_unlinked(path->dentry))
err = attach_recursive_mnt(mnt, path, NULL);
out_unlock:
mutex_unlock(&path->dentry->d_inode->i_mutex);
@ -1601,7 +1552,7 @@ static int do_move_mount(struct path *path, char *old_name)
down_write(&namespace_sem);
while (d_mountpoint(path->dentry) &&
follow_down(&path->mnt, &path->dentry))
follow_down(path))
;
err = -EINVAL;
if (!check_mnt(path->mnt) || !check_mnt(old_path.mnt))
@ -1612,7 +1563,7 @@ static int do_move_mount(struct path *path, char *old_name)
if (IS_DEADDIR(path->dentry->d_inode))
goto out1;
if (!IS_ROOT(path->dentry) && d_unhashed(path->dentry))
if (d_unlinked(path->dentry))
goto out1;
err = -EINVAL;
@ -1676,7 +1627,9 @@ static int do_new_mount(struct path *path, char *type, int flags,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
lock_kernel();
mnt = do_kern_mount(type, flags, name, data);
unlock_kernel();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
@ -1695,10 +1648,10 @@ int do_add_mount(struct vfsmount *newmnt, struct path *path,
down_write(&namespace_sem);
/* Something was mounted here while we slept */
while (d_mountpoint(path->dentry) &&
follow_down(&path->mnt, &path->dentry))
follow_down(path))
;
err = -EINVAL;
if (!check_mnt(path->mnt))
if (!(mnt_flags & MNT_SHRINKABLE) && !check_mnt(path->mnt))
goto unlock;
/* Refuse the same filesystem on the same mount point */
@ -2092,10 +2045,8 @@ SYSCALL_DEFINE5(mount, char __user *, dev_name, char __user *, dir_name,
if (retval < 0)
goto out3;
lock_kernel();
retval = do_mount((char *)dev_page, dir_page, (char *)type_page,
flags, (void *)data_page);
unlock_kernel();
free_page(data_page);
out3:
@ -2175,9 +2126,9 @@ SYSCALL_DEFINE2(pivot_root, const char __user *, new_root,
error = -ENOENT;
if (IS_DEADDIR(new.dentry->d_inode))
goto out2;
if (d_unhashed(new.dentry) && !IS_ROOT(new.dentry))
if (d_unlinked(new.dentry))
goto out2;
if (d_unhashed(old.dentry) && !IS_ROOT(old.dentry))
if (d_unlinked(old.dentry))
goto out2;
error = -EBUSY;
if (new.mnt == root.mnt ||

4
fs/ncpfs/inode.c
View File

@ -736,6 +736,8 @@ static void ncp_put_super(struct super_block *sb)
{
struct ncp_server *server = NCP_SBP(sb);
lock_kernel();
ncp_lock_server(server);
ncp_disconnect(server);
ncp_unlock_server(server);
@ -769,6 +771,8 @@ static void ncp_put_super(struct super_block *sb)
vfree(server->packet);
sb->s_fs_info = NULL;
kfree(server);
unlock_kernel();
}
static int ncp_statfs(struct dentry *dentry, struct kstatfs *buf)

2
fs/nfs/namespace.c
View File

@ -154,7 +154,7 @@ static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
goto out;
out_follow:
while (d_mountpoint(nd->path.dentry) &&
follow_down(&nd->path.mnt, &nd->path.dentry))
follow_down(&nd->path))
;
err = 0;
goto out;

2
fs/nfs/super.c
View File

@ -1813,6 +1813,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
if (data == NULL)
return -ENOMEM;
lock_kernel();
/* fill out struct with values from existing mount */
data->flags = nfss->flags;
data->rsize = nfss->rsize;
@ -1837,6 +1838,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
error = nfs_compare_remount_data(nfss, data);
out:
kfree(data);
unlock_kernel();
return error;
}

74
fs/nfsd/export.c
View File

@ -847,9 +847,8 @@ exp_get_fsid_key(svc_client *clp, int fsid)
return exp_find_key(clp, FSID_NUM, fsidv, NULL);
}
static svc_export *exp_get_by_name(svc_client *clp, struct vfsmount *mnt,
struct dentry *dentry,
struct cache_req *reqp)
static svc_export *exp_get_by_name(svc_client *clp, const struct path *path,
struct cache_req *reqp)
{
struct svc_export *exp, key;
int err;
@ -858,8 +857,7 @@ static svc_export *exp_get_by_name(svc_client *clp, struct vfsmount *mnt,
return ERR_PTR(-ENOENT);
key.ex_client = clp;
key.ex_path.mnt = mnt;
key.ex_path.dentry = dentry;
key.ex_path = *path;
exp = svc_export_lookup(&key);
if (exp == NULL)
@ -873,24 +871,19 @@ static svc_export *exp_get_by_name(svc_client *clp, struct vfsmount *mnt,
/*
* Find the export entry for a given dentry.
*/
static struct svc_export *exp_parent(svc_client *clp, struct vfsmount *mnt,
struct dentry *dentry,
struct cache_req *reqp)
static struct svc_export *exp_parent(svc_client *clp, struct path *path)
{
svc_export *exp;
struct dentry *saved = dget(path->dentry);
svc_export *exp = exp_get_by_name(clp, path, NULL);
dget(dentry);
exp = exp_get_by_name(clp, mnt, dentry, reqp);
while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {
struct dentry *parent;
parent = dget_parent(dentry);
dput(dentry);
dentry = parent;
exp = exp_get_by_name(clp, mnt, dentry, reqp);
while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) {
struct dentry *parent = dget_parent(path->dentry);
dput(path->dentry);
path->dentry = parent;
exp = exp_get_by_name(clp, path, NULL);
}
dput(dentry);
dput(path->dentry);
path->dentry = saved;
return exp;
}
@ -1018,7 +1011,7 @@ exp_export(struct nfsctl_export *nxp)
goto out_put_clp;
err = -EINVAL;
exp = exp_get_by_name(clp, path.mnt, path.dentry, NULL);
exp = exp_get_by_name(clp, &path, NULL);
memset(&new, 0, sizeof(new));
@ -1135,7 +1128,7 @@ exp_unexport(struct nfsctl_export *nxp)
goto out_domain;
err = -EINVAL;
exp = exp_get_by_name(dom, path.mnt, path.dentry, NULL);
exp = exp_get_by_name(dom, &path, NULL);
path_put(&path);
if (IS_ERR(exp))
goto out_domain;
@ -1177,7 +1170,7 @@ exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize)
dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
name, path.dentry, clp->name,
inode->i_sb->s_id, inode->i_ino);
exp = exp_parent(clp, path.mnt, path.dentry, NULL);
exp = exp_parent(clp, &path);
if (IS_ERR(exp)) {
err = PTR_ERR(exp);
goto out;
@ -1207,7 +1200,7 @@ static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type,
if (IS_ERR(ek))
return ERR_CAST(ek);
exp = exp_get_by_name(clp, ek->ek_path.mnt, ek->ek_path.dentry, reqp);
exp = exp_get_by_name(clp, &ek->ek_path, reqp);
cache_put(&ek->h, &svc_expkey_cache);
if (IS_ERR(exp))
@ -1247,8 +1240,7 @@ __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp)
* use exp_get_by_name() or exp_find().
*/
struct svc_export *
rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
struct dentry *dentry)
rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path)
{
struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
@ -1256,8 +1248,7 @@ rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
goto gss;
/* First try the auth_unix client: */
exp = exp_get_by_name(rqstp->rq_client, mnt, dentry,
&rqstp->rq_chandle);
exp = exp_get_by_name(rqstp->rq_client, path, &rqstp->rq_chandle);
if (PTR_ERR(exp) == -ENOENT)
goto gss;
if (IS_ERR(exp))
@ -1269,8 +1260,7 @@ rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
/* Otherwise, try falling back on gss client */
if (rqstp->rq_gssclient == NULL)
return exp;
gssexp = exp_get_by_name(rqstp->rq_gssclient, mnt, dentry,
&rqstp->rq_chandle);
gssexp = exp_get_by_name(rqstp->rq_gssclient, path, &rqstp->rq_chandle);
if (PTR_ERR(gssexp) == -ENOENT)
return exp;
if (!IS_ERR(exp))
@ -1309,23 +1299,19 @@ rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
}
struct svc_export *
rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt,
struct dentry *dentry)
rqst_exp_parent(struct svc_rqst *rqstp, struct path *path)
{
struct svc_export *exp;
struct dentry *saved = dget(path->dentry);
struct svc_export *exp = rqst_exp_get_by_name(rqstp, path);
dget(dentry);
exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {
struct dentry *parent;
parent = dget_parent(dentry);
dput(dentry);
dentry = parent;
exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) {
struct dentry *parent = dget_parent(path->dentry);
dput(path->dentry);
path->dentry = parent;
exp = rqst_exp_get_by_name(rqstp, path);
}
dput(dentry);
dput(path->dentry);
path->dentry = saved;
return exp;
}

56
fs/nfsd/vfs.c
View File

@ -101,36 +101,35 @@ nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
{
struct svc_export *exp = *expp, *exp2 = NULL;
struct dentry *dentry = *dpp;
struct vfsmount *mnt = mntget(exp->ex_path.mnt);
struct dentry *mounts = dget(dentry);
struct path path = {.mnt = mntget(exp->ex_path.mnt),
.dentry = dget(dentry)};
int err = 0;
while (follow_down(&mnt,&mounts)&&d_mountpoint(mounts));
while (d_mountpoint(path.dentry) && follow_down(&path))
;
exp2 = rqst_exp_get_by_name(rqstp, mnt, mounts);
exp2 = rqst_exp_get_by_name(rqstp, &path);
if (IS_ERR(exp2)) {
if (PTR_ERR(exp2) != -ENOENT)
err = PTR_ERR(exp2);
dput(mounts);
mntput(mnt);
path_put(&path);
goto out;
}
if ((exp->ex_flags & NFSEXP_CROSSMOUNT) || EX_NOHIDE(exp2)) {
/* successfully crossed mount point */
/*
* This is subtle: dentry is *not* under mnt at this point.
* The only reason we are safe is that original mnt is pinned
* down by exp, so we should dput before putting exp.
* This is subtle: path.dentry is *not* on path.mnt
* at this point. The only reason we are safe is that
* original mnt is pinned down by exp, so we should
* put path *before* putting exp
*/
dput(dentry);
*dpp = mounts;
exp_put(exp);
*dpp = path.dentry;
path.dentry = dentry;
*expp = exp2;
} else {
exp_put(exp2);
dput(mounts);
exp2 = exp;
}
mntput(mnt);
path_put(&path);
exp_put(exp2);
out:
return err;
}
@ -169,28 +168,29 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
/* checking mountpoint crossing is very different when stepping up */
struct svc_export *exp2 = NULL;
struct dentry *dp;
struct vfsmount *mnt = mntget(exp->ex_path.mnt);
dentry = dget(dparent);
while(dentry == mnt->mnt_root && follow_up(&mnt, &dentry))
;
dp = dget_parent(dentry);
dput(dentry);
dentry = dp;
struct path path = {.mnt = mntget(exp->ex_path.mnt),
.dentry = dget(dparent)};
exp2 = rqst_exp_parent(rqstp, mnt, dentry);
while (path.dentry == path.mnt->mnt_root &&
follow_up(&path))
;
dp = dget_parent(path.dentry);
dput(path.dentry);
path.dentry = dp;
exp2 = rqst_exp_parent(rqstp, &path);
if (PTR_ERR(exp2) == -ENOENT) {
dput(dentry);
dentry = dget(dparent);
} else if (IS_ERR(exp2)) {
host_err = PTR_ERR(exp2);
dput(dentry);
mntput(mnt);
path_put(&path);
goto out_nfserr;
} else {
dentry = dget(path.dentry);
exp_put(exp);
exp = exp2;
}
mntput(mnt);
path_put(&path);
}
} else {
fh_lock(fhp);

6
fs/nilfs2/cpfile.c
View File

@ -864,11 +864,11 @@ int nilfs_cpfile_change_cpmode(struct inode *cpfile, __u64 cno, int mode)
case NILFS_CHECKPOINT:
/*
* Check for protecting existing snapshot mounts:
* bd_mount_sem is used to make this operation atomic and
* ns_mount_mutex is used to make this operation atomic and
* exclusive with a new mount job. Though it doesn't cover
* umount, it's enough for the purpose.
*/
down(&nilfs->ns_bdev->bd_mount_sem);
mutex_lock(&nilfs->ns_mount_mutex);
if (nilfs_checkpoint_is_mounted(nilfs, cno, 1)) {
/* Current implementation does not have to protect
plain read-only mounts since they are exclusive
@ -877,7 +877,7 @@ int nilfs_cpfile_change_cpmode(struct inode *cpfile, __u64 cno, int mode)
ret = -EBUSY;
} else
ret = nilfs_cpfile_clear_snapshot(cpfile, cno);
up(&nilfs->ns_bdev->bd_mount_sem);
mutex_unlock(&nilfs->ns_mount_mutex);
return ret;
case NILFS_SNAPSHOT:
return nilfs_cpfile_set_snapshot(cpfile, cno);

1
fs/nilfs2/sb.h
View File

@ -60,6 +60,7 @@ struct nilfs_sb_info {
struct super_block *s_super; /* reverse pointer to super_block */
struct the_nilfs *s_nilfs;
struct list_head s_list; /* list head for nilfs->ns_supers */
atomic_t s_count; /* reference count */
/* Segment constructor */
struct list_head s_dirty_files; /* dirty files list */

258
fs/nilfs2/super.c
View File

@ -65,9 +65,8 @@ MODULE_DESCRIPTION("A New Implementation of the Log-structured Filesystem "
"(NILFS)");
MODULE_LICENSE("GPL");
static void nilfs_write_super(struct super_block *sb);
static int nilfs_remount(struct super_block *sb, int *flags, char *data);
static int test_exclusive_mount(struct file_system_type *fs_type,
struct block_device *bdev, int flags);
/**
* nilfs_error() - report failure condition on a filesystem
@ -315,6 +314,11 @@ static void nilfs_put_super(struct super_block *sb)
struct nilfs_sb_info *sbi = NILFS_SB(sb);
struct the_nilfs *nilfs = sbi->s_nilfs;
lock_kernel();
if (sb->s_dirt)
nilfs_write_super(sb);
nilfs_detach_segment_constructor(sbi);
if (!(sb->s_flags & MS_RDONLY)) {
@ -323,12 +327,18 @@ static void nilfs_put_super(struct super_block *sb)
nilfs_commit_super(sbi, 1);
up_write(&nilfs->ns_sem);
}
down_write(&nilfs->ns_super_sem);
if (nilfs->ns_current == sbi)
nilfs->ns_current = NULL;
up_write(&nilfs->ns_super_sem);
nilfs_detach_checkpoint(sbi);
put_nilfs(sbi->s_nilfs);
sbi->s_super = NULL;
sb->s_fs_info = NULL;
kfree(sbi);
nilfs_put_sbinfo(sbi);
unlock_kernel();
}
/**
@ -383,6 +393,8 @@ static int nilfs_sync_fs(struct super_block *sb, int wait)
{
int err = 0;
nilfs_write_super(sb);
/* This function is called when super block should be written back */
if (wait)
err = nilfs_construct_segment(sb);
@ -396,9 +408,9 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno)
struct buffer_head *bh_cp;
int err;
down_write(&nilfs->ns_sem);
down_write(&nilfs->ns_super_sem);
list_add(&sbi->s_list, &nilfs->ns_supers);
up_write(&nilfs->ns_sem);
up_write(&nilfs->ns_super_sem);
sbi->s_ifile = nilfs_mdt_new(
nilfs, sbi->s_super, NILFS_IFILE_INO, NILFS_IFILE_GFP);
@ -436,9 +448,9 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno)
nilfs_mdt_destroy(sbi->s_ifile);
sbi->s_ifile = NULL;
down_write(&nilfs->ns_sem);
down_write(&nilfs->ns_super_sem);
list_del_init(&sbi->s_list);
up_write(&nilfs->ns_sem);
up_write(&nilfs->ns_super_sem);
return err;
}
@ -450,9 +462,9 @@ void nilfs_detach_checkpoint(struct nilfs_sb_info *sbi)
nilfs_mdt_clear(sbi->s_ifile);
nilfs_mdt_destroy(sbi->s_ifile);
sbi->s_ifile = NULL;
down_write(&nilfs->ns_sem);
down_write(&nilfs->ns_super_sem);
list_del_init(&sbi->s_list);
up_write(&nilfs->ns_sem);
up_write(&nilfs->ns_super_sem);
}
static int nilfs_mark_recovery_complete(struct nilfs_sb_info *sbi)
@ -752,7 +764,7 @@ int nilfs_store_magic_and_option(struct super_block *sb,
* @silent: silent mode flag
* @nilfs: the_nilfs struct
*
* This function is called exclusively by bd_mount_mutex.
* This function is called exclusively by nilfs->ns_mount_mutex.
* So, the recovery process is protected from other simultaneous mounts.
*/
static int
@ -773,6 +785,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
get_nilfs(nilfs);
sbi->s_nilfs = nilfs;
sbi->s_super = sb;
atomic_set(&sbi->s_count, 1);
err = init_nilfs(nilfs, sbi, (char *)data);
if (err)
@ -870,6 +883,11 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
goto failed_root;
}
down_write(&nilfs->ns_super_sem);
if (!nilfs_test_opt(sbi, SNAPSHOT))
nilfs->ns_current = sbi;
up_write(&nilfs->ns_super_sem);
return 0;
failed_root:
@ -885,7 +903,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
failed_sbi:
put_nilfs(nilfs);
sb->s_fs_info = NULL;
kfree(sbi);
nilfs_put_sbinfo(sbi);
return err;
}
@ -898,6 +916,9 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
struct nilfs_mount_options old_opts;
int err;
lock_kernel();
down_write(&nilfs->ns_super_sem);
old_sb_flags = sb->s_flags;
old_opts.mount_opt = sbi->s_mount_opt;
old_opts.snapshot_cno = sbi->s_snapshot_cno;
@ -945,14 +966,12 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
* store the current valid flag. (It may have been changed
* by fsck since we originally mounted the partition.)
*/
down(&sb->s_bdev->bd_mount_sem);
/* Check existing RW-mount */
if (test_exclusive_mount(sb->s_type, sb->s_bdev, 0)) {
if (nilfs->ns_current && nilfs->ns_current != sbi) {
printk(KERN_WARNING "NILFS (device %s): couldn't "
"remount because a RW-mount exists.\n",
"remount because an RW-mount exists.\n",
sb->s_id);
err = -EBUSY;
goto rw_remount_failed;
goto restore_opts;
}
if (sbi->s_snapshot_cno != nilfs_last_cno(nilfs)) {
printk(KERN_WARNING "NILFS (device %s): couldn't "
@ -960,7 +979,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
"the latest one.\n",
sb->s_id);
err = -EINVAL;
goto rw_remount_failed;
goto restore_opts;
}
sb->s_flags &= ~MS_RDONLY;
nilfs_clear_opt(sbi, SNAPSHOT);
@ -968,28 +987,31 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
err = nilfs_attach_segment_constructor(sbi);
if (err)
goto rw_remount_failed;
goto restore_opts;
down_write(&nilfs->ns_sem);
nilfs_setup_super(sbi);
up_write(&nilfs->ns_sem);
up(&sb->s_bdev->bd_mount_sem);
nilfs->ns_current = sbi;
}
out:
up_write(&nilfs->ns_super_sem);
unlock_kernel();
return 0;
rw_remount_failed:
up(&sb->s_bdev->bd_mount_sem);
restore_opts:
sb->s_flags = old_sb_flags;
sbi->s_mount_opt = old_opts.mount_opt;
sbi->s_snapshot_cno = old_opts.snapshot_cno;
up_write(&nilfs->ns_super_sem);
unlock_kernel();
return err;
}
struct nilfs_super_data {
struct block_device *bdev;
struct nilfs_sb_info *sbi;
__u64 cno;
int flags;
};
@ -1048,33 +1070,7 @@ static int nilfs_test_bdev_super(struct super_block *s, void *data)
{
struct nilfs_super_data *sd = data;
return s->s_bdev == sd->bdev;
}
static int nilfs_test_bdev_super2(struct super_block *s, void *data)
{
struct nilfs_super_data *sd = data;
int ret;
if (s->s_bdev != sd->bdev)
return 0;
if (!((s->s_flags | sd->flags) & MS_RDONLY))
return 1; /* Reuse an old R/W-mode super_block */
if (s->s_flags & sd->flags & MS_RDONLY) {
if (down_read_trylock(&s->s_umount)) {
ret = s->s_root &&
(sd->cno == NILFS_SB(s)->s_snapshot_cno);
up_read(&s->s_umount);
/*
* This path is locked with sb_lock by sget().
* So, drop_super() causes deadlock.
*/
return ret;
}
}
return 0;
return sd->sbi && s->s_fs_info == (void *)sd->sbi;
}
static int
@ -1082,8 +1078,8 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data, struct vfsmount *mnt)
{
struct nilfs_super_data sd;
struct super_block *s, *s2;
struct the_nilfs *nilfs = NULL;
struct super_block *s;
struct the_nilfs *nilfs;
int err, need_to_close = 1;
sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type);
@ -1095,7 +1091,6 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
* much more information than normal filesystems to identify mount
* instance. For snapshot mounts, not only a mount type (ro-mount
* or rw-mount) but also a checkpoint number is required.
* The results are passed in sget() using nilfs_super_data.
*/
sd.cno = 0;
sd.flags = flags;
@ -1104,64 +1099,59 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
goto failed;
}
/*
* once the super is inserted into the list by sget, s_umount
* will protect the lockfs code from trying to start a snapshot
* while we are mounting
*/
down(&sd.bdev->bd_mount_sem);
if (!sd.cno &&
(err = test_exclusive_mount(fs_type, sd.bdev, flags ^ MS_RDONLY))) {
err = (err < 0) ? : -EBUSY;
goto failed_unlock;
nilfs = find_or_create_nilfs(sd.bdev);
if (!nilfs) {
err = -ENOMEM;
goto failed;
}
mutex_lock(&nilfs->ns_mount_mutex);
if (!sd.cno) {
/*
* Check if an exclusive mount exists or not.
* Snapshot mounts coexist with a current mount
* (i.e. rw-mount or ro-mount), whereas rw-mount and
* ro-mount are mutually exclusive.
*/
down_read(&nilfs->ns_super_sem);
if (nilfs->ns_current &&
((nilfs->ns_current->s_super->s_flags ^ flags)
& MS_RDONLY)) {
up_read(&nilfs->ns_super_sem);
err = -EBUSY;
goto failed_unlock;
}
up_read(&nilfs->ns_super_sem);
}
/*
* Phase-1: search any existent instance and get the_nilfs
* Find existing nilfs_sb_info struct
*/
sd.sbi = nilfs_find_sbinfo(nilfs, !(flags & MS_RDONLY), sd.cno);
if (!sd.cno)
/* trying to get the latest checkpoint. */
sd.cno = nilfs_last_cno(nilfs);
/*
* Get super block instance holding the nilfs_sb_info struct.
* A new instance is allocated if no existing mount is present or
* existing instance has been unmounted.
*/
s = sget(fs_type, nilfs_test_bdev_super, nilfs_set_bdev_super, &sd);
if (IS_ERR(s))
goto error_s;
if (sd.sbi)
nilfs_put_sbinfo(sd.sbi);
if (!s->s_root) {
err = -ENOMEM;
nilfs = alloc_nilfs(sd.bdev);
if (!nilfs)
goto cancel_new;
} else {
struct nilfs_sb_info *sbi = NILFS_SB(s);
/*
* s_umount protects super_block from unmount process;
* It covers pointers of nilfs_sb_info and the_nilfs.
*/
nilfs = sbi->s_nilfs;
get_nilfs(nilfs);
up_write(&s->s_umount);
/*
* Phase-2: search specified snapshot or R/W mode super_block
*/
if (!sd.cno)
/* trying to get the latest checkpoint. */
sd.cno = nilfs_last_cno(nilfs);
s2 = sget(fs_type, nilfs_test_bdev_super2,
nilfs_set_bdev_super, &sd);
deactivate_super(s);
/*
* Although deactivate_super() invokes close_bdev_exclusive() at
* kill_block_super(). Here, s is an existent mount; we need
* one more close_bdev_exclusive() call.
*/
s = s2;
if (IS_ERR(s))
goto error_s;
if (IS_ERR(s)) {
err = PTR_ERR(s);
goto failed_unlock;
}
if (!s->s_root) {
char b[BDEVNAME_SIZE];
/* New superblock instance created */
s->s_flags = flags;
strlcpy(s->s_id, bdevname(sd.bdev, b), sizeof(s->s_id));
sb_set_blocksize(s, block_size(sd.bdev));
@ -1172,26 +1162,18 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
s->s_flags |= MS_ACTIVE;
need_to_close = 0;
} else if (!(s->s_flags & MS_RDONLY)) {
err = -EBUSY;
}
up(&sd.bdev->bd_mount_sem);
mutex_unlock(&nilfs->ns_mount_mutex);
put_nilfs(nilfs);
if (need_to_close)
close_bdev_exclusive(sd.bdev, flags);
simple_set_mnt(mnt, s);
return 0;
error_s:
up(&sd.bdev->bd_mount_sem);
if (nilfs)
put_nilfs(nilfs);
close_bdev_exclusive(sd.bdev, flags);
return PTR_ERR(s);
failed_unlock:
up(&sd.bdev->bd_mount_sem);
mutex_unlock(&nilfs->ns_mount_mutex);
put_nilfs(nilfs);
failed:
close_bdev_exclusive(sd.bdev, flags);
@ -1199,70 +1181,18 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
cancel_new:
/* Abandoning the newly allocated superblock */
up(&sd.bdev->bd_mount_sem);
if (nilfs)
put_nilfs(nilfs);
mutex_unlock(&nilfs->ns_mount_mutex);
put_nilfs(nilfs);
up_write(&s->s_umount);
deactivate_super(s);
/*
* deactivate_super() invokes close_bdev_exclusive().
* We must finish all post-cleaning before this call;
* put_nilfs() and unlocking bd_mount_sem need the block device.
* put_nilfs() needs the block device.
*/
return err;
}
static int nilfs_test_bdev_super3(struct super_block *s, void *data)
{
struct nilfs_super_data *sd = data;
int ret;
if (s->s_bdev != sd->bdev)
return 0;
if (down_read_trylock(&s->s_umount)) {
ret = (s->s_flags & MS_RDONLY) && s->s_root &&
nilfs_test_opt(NILFS_SB(s), SNAPSHOT);
up_read(&s->s_umount);
if (ret)
return 0; /* ignore snapshot mounts */
}
return !((sd->flags ^ s->s_flags) & MS_RDONLY);
}
static int __false_bdev_super(struct super_block *s, void *data)
{
#if 0 /* XXX: workaround for lock debug. This is not good idea */
up_write(&s->s_umount);
#endif
return -EFAULT;
}
/**
* test_exclusive_mount - check whether an exclusive RW/RO mount exists or not.
* fs_type: filesystem type
* bdev: block device
* flag: 0 (check rw-mount) or MS_RDONLY (check ro-mount)
* res: pointer to an integer to store result
*
* This function must be called within a section protected by bd_mount_mutex.
*/
static int test_exclusive_mount(struct file_system_type *fs_type,
struct block_device *bdev, int flags)
{
struct super_block *s;
struct nilfs_super_data sd = { .flags = flags, .bdev = bdev };
s = sget(fs_type, nilfs_test_bdev_super3, __false_bdev_super, &sd);
if (IS_ERR(s)) {
if (PTR_ERR(s) != -EFAULT)
return PTR_ERR(s);
return 0; /* Not found */
}
up_write(&s->s_umount);
deactivate_super(s);
return 1; /* Found */
}
struct file_system_type nilfs_fs_type = {
.owner = THIS_MODULE,
.name = "nilfs2",

113
fs/nilfs2/the_nilfs.c
View File

@ -35,6 +35,10 @@
#include "seglist.h"
#include "segbuf.h"
static LIST_HEAD(nilfs_objects);
static DEFINE_SPINLOCK(nilfs_lock);
void nilfs_set_last_segment(struct the_nilfs *nilfs,
sector_t start_blocknr, u64 seq, __u64 cno)
{
@ -55,7 +59,7 @@ void nilfs_set_last_segment(struct the_nilfs *nilfs,
* Return Value: On success, pointer to the_nilfs is returned.
* On error, NULL is returned.
*/
struct the_nilfs *alloc_nilfs(struct block_device *bdev)
static struct the_nilfs *alloc_nilfs(struct block_device *bdev)
{
struct the_nilfs *nilfs;
@ -68,7 +72,10 @@ struct the_nilfs *alloc_nilfs(struct block_device *bdev)
atomic_set(&nilfs->ns_writer_refcount, -1);
atomic_set(&nilfs->ns_ndirtyblks, 0);
init_rwsem(&nilfs->ns_sem);
init_rwsem(&nilfs->ns_super_sem);
mutex_init(&nilfs->ns_mount_mutex);
mutex_init(&nilfs->ns_writer_mutex);
INIT_LIST_HEAD(&nilfs->ns_list);
INIT_LIST_HEAD(&nilfs->ns_supers);
spin_lock_init(&nilfs->ns_last_segment_lock);
nilfs->ns_gc_inodes_h = NULL;
@ -77,6 +84,45 @@ struct the_nilfs *alloc_nilfs(struct block_device *bdev)
return nilfs;
}
/**
* find_or_create_nilfs - find or create nilfs object
* @bdev: block device to which the_nilfs is related
*
* find_nilfs() looks up an existent nilfs object created on the
* device and gets the reference count of the object. If no nilfs object
* is found on the device, a new nilfs object is allocated.
*
* Return Value: On success, pointer to the nilfs object is returned.
* On error, NULL is returned.
*/
struct the_nilfs *find_or_create_nilfs(struct block_device *bdev)
{
struct the_nilfs *nilfs, *new = NULL;
retry:
spin_lock(&nilfs_lock);
list_for_each_entry(nilfs, &nilfs_objects, ns_list) {
if (nilfs->ns_bdev == bdev) {
get_nilfs(nilfs);
spin_unlock(&nilfs_lock);
if (new)
put_nilfs(new);
return nilfs; /* existing object */
}
}
if (new) {
list_add_tail(&new->ns_list, &nilfs_objects);
spin_unlock(&nilfs_lock);
return new; /* new object */
}
spin_unlock(&nilfs_lock);
new = alloc_nilfs(bdev);
if (new)
goto retry;
return NULL; /* insufficient memory */
}
/**
* put_nilfs - release a reference to the_nilfs
* @nilfs: the_nilfs structure to be released
@ -86,13 +132,20 @@ struct the_nilfs *alloc_nilfs(struct block_device *bdev)
*/
void put_nilfs(struct the_nilfs *nilfs)
{
if (!atomic_dec_and_test(&nilfs->ns_count))
spin_lock(&nilfs_lock);
if (!atomic_dec_and_test(&nilfs->ns_count)) {
spin_unlock(&nilfs_lock);
return;
}
list_del_init(&nilfs->ns_list);
spin_unlock(&nilfs_lock);
/*
* Increment of ns_count never occur below because the caller
* Increment of ns_count never occurs below because the caller
* of get_nilfs() holds at least one reference to the_nilfs.
* Thus its exclusion control is not required here.
*/
might_sleep();
if (nilfs_loaded(nilfs)) {
nilfs_mdt_clear(nilfs->ns_sufile);
@ -613,13 +666,63 @@ int nilfs_near_disk_full(struct the_nilfs *nilfs)
return ret;
}
/**
* nilfs_find_sbinfo - find existing nilfs_sb_info structure
* @nilfs: nilfs object
* @rw_mount: mount type (non-zero value for read/write mount)
* @cno: checkpoint number (zero for read-only mount)
*
* nilfs_find_sbinfo() returns the nilfs_sb_info structure which
* @rw_mount and @cno (in case of snapshots) matched. If no instance
* was found, NULL is returned. Although the super block instance can
* be unmounted after this function returns, the nilfs_sb_info struct
* is kept on memory until nilfs_put_sbinfo() is called.
*/
struct nilfs_sb_info *nilfs_find_sbinfo(struct the_nilfs *nilfs,
int rw_mount, __u64 cno)
{
struct nilfs_sb_info *sbi;
down_read(&nilfs->ns_super_sem);
/*
* The SNAPSHOT flag and sb->s_flags are supposed to be
* protected with nilfs->ns_super_sem.
*/
sbi = nilfs->ns_current;
if (rw_mount) {
if (sbi && !(sbi->s_super->s_flags & MS_RDONLY))
goto found; /* read/write mount */
else
goto out;
} else if (cno == 0) {
if (sbi && (sbi->s_super->s_flags & MS_RDONLY))
goto found; /* read-only mount */
else
goto out;
}
list_for_each_entry(sbi, &nilfs->ns_supers, s_list) {
if (nilfs_test_opt(sbi, SNAPSHOT) &&
sbi->s_snapshot_cno == cno)
goto found; /* snapshot mount */
}
out:
up_read(&nilfs->ns_super_sem);
return NULL;
found:
atomic_inc(&sbi->s_count);
up_read(&nilfs->ns_super_sem);
return sbi;
}
int nilfs_checkpoint_is_mounted(struct the_nilfs *nilfs, __u64 cno,
int snapshot_mount)
{
struct nilfs_sb_info *sbi;
int ret = 0;
down_read(&nilfs->ns_sem);
down_read(&nilfs->ns_super_sem);
if (cno == 0 || cno > nilfs->ns_cno)
goto out_unlock;
@ -636,6 +739,6 @@ int nilfs_checkpoint_is_mounted(struct the_nilfs *nilfs, __u64 cno,
ret++;
out_unlock:
up_read(&nilfs->ns_sem);
up_read(&nilfs->ns_super_sem);
return ret;
}

23
fs/nilfs2/the_nilfs.h
View File

@ -43,12 +43,16 @@ enum {
* struct the_nilfs - struct to supervise multiple nilfs mount points
* @ns_flags: flags
* @ns_count: reference count
* @ns_list: list head for nilfs_list
* @ns_bdev: block device
* @ns_bdi: backing dev info
* @ns_writer: back pointer to writable nilfs_sb_info
* @ns_sem: semaphore for shared states
* @ns_super_sem: semaphore for global operations across super block instances
* @ns_mount_mutex: mutex protecting mount process of nilfs
* @ns_writer_mutex: mutex protecting ns_writer attach/detach
* @ns_writer_refcount: number of referrers on ns_writer
* @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
@ -88,14 +92,23 @@ enum {
struct the_nilfs {
unsigned long ns_flags;
atomic_t ns_count;
struct list_head ns_list;
struct block_device *ns_bdev;
struct backing_dev_info *ns_bdi;
struct nilfs_sb_info *ns_writer;
struct rw_semaphore ns_sem;
struct rw_semaphore ns_super_sem;
struct mutex ns_mount_mutex;
struct mutex ns_writer_mutex;
atomic_t ns_writer_refcount;
/*
* components protected by ns_super_sem
*/
struct nilfs_sb_info *ns_current;
struct list_head ns_supers;
/*
* used for
* - loading the latest checkpoint exclusively.
@ -108,7 +121,6 @@ struct the_nilfs {
time_t ns_sbwtime[2];
unsigned ns_sbsize;
unsigned ns_mount_state;
struct list_head ns_supers;
/*
* Following fields are dedicated to a writable FS-instance.
@ -191,11 +203,12 @@ THE_NILFS_FNS(DISCONTINUED, discontinued)
#define NILFS_ALTSB_FREQ 60 /* spare superblock */
void nilfs_set_last_segment(struct the_nilfs *, sector_t, u64, __u64);
struct the_nilfs *alloc_nilfs(struct block_device *);
struct the_nilfs *find_or_create_nilfs(struct block_device *);
void put_nilfs(struct the_nilfs *);
int init_nilfs(struct the_nilfs *, struct nilfs_sb_info *, char *);
int load_nilfs(struct the_nilfs *, struct nilfs_sb_info *);
int nilfs_count_free_blocks(struct the_nilfs *, sector_t *);
struct nilfs_sb_info *nilfs_find_sbinfo(struct the_nilfs *, int, __u64);
int nilfs_checkpoint_is_mounted(struct the_nilfs *, __u64, int);
int nilfs_near_disk_full(struct the_nilfs *);
void nilfs_fall_back_super_block(struct the_nilfs *);
@ -238,6 +251,12 @@ nilfs_detach_writer(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
mutex_unlock(&nilfs->ns_writer_mutex);
}
static inline void nilfs_put_sbinfo(struct nilfs_sb_info *sbi)
{
if (!atomic_dec_and_test(&sbi->s_count))
kfree(sbi);
}
static inline void
nilfs_get_segment_range(struct the_nilfs *nilfs, __u64 segnum,
sector_t *seg_start, sector_t *seg_end)

54
fs/ntfs/super.c
View File

@ -443,6 +443,8 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
ntfs_volume *vol = NTFS_SB(sb);
ntfs_debug("Entering with remount options string: %s", opt);
lock_kernel();
#ifndef NTFS_RW
/* For read-only compiled driver, enforce read-only flag. */
*flags |= MS_RDONLY;
@ -466,15 +468,18 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
if (NVolErrors(vol)) {
ntfs_error(sb, "Volume has errors and is read-only%s",
es);
unlock_kernel();
return -EROFS;
}
if (vol->vol_flags & VOLUME_IS_DIRTY) {
ntfs_error(sb, "Volume is dirty and read-only%s", es);
unlock_kernel();
return -EROFS;
}
if (vol->vol_flags & VOLUME_MODIFIED_BY_CHKDSK) {
ntfs_error(sb, "Volume has been modified by chkdsk "
"and is read-only%s", es);
unlock_kernel();
return -EROFS;
}
if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) {
@ -482,11 +487,13 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
"(0x%x) and is read-only%s",
(unsigned)le16_to_cpu(vol->vol_flags),
es);
unlock_kernel();
return -EROFS;
}
if (ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) {
ntfs_error(sb, "Failed to set dirty bit in volume "
"information flags%s", es);
unlock_kernel();
return -EROFS;
}
#if 0
@ -506,18 +513,21 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
ntfs_error(sb, "Failed to empty journal $LogFile%s",
es);
NVolSetErrors(vol);
unlock_kernel();
return -EROFS;
}
if (!ntfs_mark_quotas_out_of_date(vol)) {
ntfs_error(sb, "Failed to mark quotas out of date%s",
es);
NVolSetErrors(vol);
unlock_kernel();
return -EROFS;
}
if (!ntfs_stamp_usnjrnl(vol)) {
ntfs_error(sb, "Failed to stamp transation log "
"($UsnJrnl)%s", es);
NVolSetErrors(vol);
unlock_kernel();
return -EROFS;
}
} else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) {
@ -533,8 +543,11 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
// TODO: Deal with *flags.
if (!parse_options(vol, opt))
if (!parse_options(vol, opt)) {
unlock_kernel();
return -EINVAL;
}
unlock_kernel();
ntfs_debug("Done.");
return 0;
}
@ -2246,6 +2259,9 @@ static void ntfs_put_super(struct super_block *sb)
ntfs_volume *vol = NTFS_SB(sb);
ntfs_debug("Entering.");
lock_kernel();
#ifdef NTFS_RW
/*
* Commit all inodes while they are still open in case some of them
@ -2373,39 +2389,12 @@ static void ntfs_put_super(struct super_block *sb)
vol->mftmirr_ino = NULL;
}
/*
* If any dirty inodes are left, throw away all mft data page cache
* pages to allow a clean umount. This should never happen any more
* due to mft.c::ntfs_mft_writepage() cleaning all the dirty pages as
* the underlying mft records are written out and cleaned. If it does,
* happen anyway, we want to know...
* We should have no dirty inodes left, due to
* mft.c::ntfs_mft_writepage() cleaning all the dirty pages as
* the underlying mft records are written out and cleaned.
*/
ntfs_commit_inode(vol->mft_ino);
write_inode_now(vol->mft_ino, 1);
if (sb_has_dirty_inodes(sb)) {
const char *s1, *s2;
mutex_lock(&vol->mft_ino->i_mutex);
truncate_inode_pages(vol->mft_ino->i_mapping, 0);
mutex_unlock(&vol->mft_ino->i_mutex);
write_inode_now(vol->mft_ino, 1);
if (sb_has_dirty_inodes(sb)) {
static const char *_s1 = "inodes";
static const char *_s2 = "";
s1 = _s1;
s2 = _s2;
} else {
static const char *_s1 = "mft pages";
static const char *_s2 = "They have been thrown "
"away. ";
s1 = _s1;
s2 = _s2;
}
ntfs_error(sb, "Dirty %s found at umount time. %sYou should "
"run chkdsk. Please email "
"linux-ntfs-dev@lists.sourceforge.net and say "
"that you saw this message. Thank you.", s1,
s2);
}
#endif /* NTFS_RW */
iput(vol->mft_ino);
@ -2444,7 +2433,8 @@ static void ntfs_put_super(struct super_block *sb)
}
sb->s_fs_info = NULL;
kfree(vol);
return;
unlock_kernel();
}
/**

22
fs/ocfs2/super.c
View File

@ -42,6 +42,7 @@
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/quotaops.h>
#include <linux/smp_lock.h>
#define MLOG_MASK_PREFIX ML_SUPER
#include <cluster/masklog.h>
@ -126,7 +127,6 @@ static int ocfs2_get_sector(struct super_block *sb,
struct buffer_head **bh,
int block,
int sect_size);
static void ocfs2_write_super(struct super_block *sb);
static struct inode *ocfs2_alloc_inode(struct super_block *sb);
static void ocfs2_destroy_inode(struct inode *inode);
static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
@ -141,7 +141,6 @@ static const struct super_operations ocfs2_sops = {
.clear_inode = ocfs2_clear_inode,
.delete_inode = ocfs2_delete_inode,
.sync_fs = ocfs2_sync_fs,
.write_super = ocfs2_write_super,
.put_super = ocfs2_put_super,
.remount_fs = ocfs2_remount,
.show_options = ocfs2_show_options,
@ -365,24 +364,12 @@ static struct file_operations ocfs2_osb_debug_fops = {
.llseek = generic_file_llseek,
};
/*
* write_super and sync_fs ripped right out of ext3.
*/
static void ocfs2_write_super(struct super_block *sb)
{
if (mutex_trylock(&sb->s_lock) != 0)
BUG();
sb->s_dirt = 0;
}
static int ocfs2_sync_fs(struct super_block *sb, int wait)
{
int status;
tid_t target;
struct ocfs2_super *osb = OCFS2_SB(sb);
sb->s_dirt = 0;
if (ocfs2_is_hard_readonly(osb))
return -EROFS;
@ -595,6 +582,8 @@ static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
struct mount_options parsed_options;
struct ocfs2_super *osb = OCFS2_SB(sb);
lock_kernel();
if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
ret = -EINVAL;
goto out;
@ -698,6 +687,7 @@ static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
ocfs2_set_journal_params(osb);
}
out:
unlock_kernel();
return ret;
}
@ -1550,9 +1540,13 @@ static void ocfs2_put_super(struct super_block *sb)
{
mlog_entry("(0x%p)\n", sb);
lock_kernel();
ocfs2_sync_blockdev(sb);
ocfs2_dismount_volume(sb, 0);
unlock_kernel();
mlog_exit_void();
}

17
fs/omfs/file.c
View File

@ -11,21 +11,6 @@
#include <linux/mpage.h>
#include "omfs.h"
static int omfs_sync_file(struct file *file, struct dentry *dentry,
int datasync)
{
struct inode *inode = dentry->d_inode;
int err;
err = sync_mapping_buffers(inode->i_mapping);
if (!(inode->i_state & I_DIRTY))
return err;
if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
return err;
err |= omfs_sync_inode(inode);
return err ? -EIO : 0;
}
static u32 omfs_max_extents(struct omfs_sb_info *sbi, int offset)
{
return (sbi->s_sys_blocksize - offset -
@ -344,7 +329,7 @@ struct file_operations omfs_file_operations = {
.aio_read = generic_file_aio_read,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.fsync = omfs_sync_file,
.fsync = simple_fsync,
.splice_read = generic_file_splice_read,
};

4
fs/open.c
View File

@ -612,7 +612,7 @@ SYSCALL_DEFINE2(fchmod, unsigned int, fd, mode_t, mode)
audit_inode(NULL, dentry);
err = mnt_want_write(file->f_path.mnt);
err = mnt_want_write_file(file);
if (err)
goto out_putf;
mutex_lock(&inode->i_mutex);
@ -761,7 +761,7 @@ SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
if (!file)
goto out;
error = mnt_want_write(file->f_path.mnt);
error = mnt_want_write_file(file);
if (error)
goto out_fput;
dentry = file->f_path.dentry;

25
fs/proc/internal.h
View File

@ -92,3 +92,28 @@ struct pde_opener {
struct list_head lh;
};
void pde_users_dec(struct proc_dir_entry *pde);
extern spinlock_t proc_subdir_lock;
struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
unsigned long task_vsize(struct mm_struct *);
int task_statm(struct mm_struct *, int *, int *, int *, int *);
void task_mem(struct seq_file *, struct mm_struct *);
struct proc_dir_entry *de_get(struct proc_dir_entry *de);
void de_put(struct proc_dir_entry *de);
extern struct vfsmount *proc_mnt;
int proc_fill_super(struct super_block *);
struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
/*
* These are generic /proc routines that use the internal
* "struct proc_dir_entry" tree to traverse the filesystem.
*
* The /proc root directory has extended versions to take care
* of the /proc/<pid> subdirectories.
*/
int proc_readdir(struct file *, void *, filldir_t);
struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);

1
fs/proc/proc_devtree.c
View File

@ -11,6 +11,7 @@
#include <linux/string.h>
#include <asm/prom.h>
#include <asm/uaccess.h>
#include "internal.h"
#ifndef HAVE_ARCH_DEVTREE_FIXUPS
static inline void set_node_proc_entry(struct device_node *np,

2
fs/qnx4/Makefile
View File

@ -4,4 +4,4 @@
obj-$(CONFIG_QNX4FS_FS) += qnx4.o
qnx4-objs := inode.o dir.o namei.o file.o bitmap.o truncate.o fsync.o
qnx4-objs := inode.o dir.o namei.o file.o bitmap.o truncate.o

7
fs/qnx4/bitmap.c
View File

@ -13,14 +13,9 @@
* 28-06-1998 by Frank Denis : qnx4_free_inode (to be fixed) .
*/
#include <linux/time.h>
#include <linux/fs.h>
#include <linux/qnx4_fs.h>
#include <linux/stat.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/bitops.h>
#include "qnx4.h"
#if 0
int qnx4_new_block(struct super_block *sb)

9
fs/qnx4/dir.c
View File

@ -11,14 +11,9 @@
* 20-06-1998 by Frank Denis : Linux 2.1.99+ & dcache support.
*/
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/qnx4_fs.h>
#include <linux/stat.h>
#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include "qnx4.h"
static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
@ -84,7 +79,7 @@ const struct file_operations qnx4_dir_operations =
{
.read = generic_read_dir,
.readdir = qnx4_readdir,
.fsync = file_fsync,
.fsync = simple_fsync,
};
const struct inode_operations qnx4_dir_inode_operations =

5
fs/qnx4/file.c
View File

@ -12,8 +12,7 @@
* 27-06-1998 by Frank Denis : file overwriting.
*/
#include <linux/fs.h>
#include <linux/qnx4_fs.h>
#include "qnx4.h"
/*
* We have mostly NULL's here: the current defaults are ok for
@ -29,7 +28,7 @@ const struct file_operations qnx4_file_operations =
#ifdef CONFIG_QNX4FS_RW
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.fsync = qnx4_sync_file,
.fsync = simple_fsync,
#endif
};

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