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

Browse Source 
Pull more vfs updates from Al Viro:
 "In this pile:

   - autofs-namespace series
   - dedupe stuff
   - more struct path constification"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (40 commits)
  ocfs2: implement the VFS clone_range, copy_range, and dedupe_range features
  ocfs2: charge quota for reflinked blocks
  ocfs2: fix bad pointer cast
  ocfs2: always unlock when completing dio writes
  ocfs2: don't eat io errors during _dio_end_io_write
  ocfs2: budget for extent tree splits when adding refcount flag
  ocfs2: prohibit refcounted swapfiles
  ocfs2: add newlines to some error messages
  ocfs2: convert inode refcount test to a helper
  simple_write_end(): don't zero in short copy into uptodate
  exofs: don't mess with simple_write_{begin,end}
  9p: saner ->write_end() on failing copy into non-uptodate page
  fix gfs2_stuffed_write_end() on short copies
  fix ceph_write_end()
  nfs_write_end(): fix handling of short copies
  vfs: refactor clone/dedupe_file_range common functions
  fs: try to clone files first in vfs_copy_file_range
  vfs: misc struct path constification
  namespace.c: constify struct path passed to a bunch of primitives
  quota: constify struct path in quota_on
  ...
This commit is contained in:
Linus Torvalds 2016-12-17 18:44:00 -08:00
commit 0110c350c8
64 changed files with 1027 additions and 509 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/filesystems/Locking
View File

@ -20,7 +20,7 @@ prototypes:
void (*d_iput)(struct dentry *, struct inode *);
char *(*d_dname)((struct dentry *dentry, char *buffer, int buflen);
struct vfsmount *(*d_automount)(struct path *path);
int (*d_manage)(struct dentry *, bool);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
unsigned int);

2
Documentation/filesystems/vfs.txt
View File

@ -948,7 +948,7 @@ struct dentry_operations {
void (*d_iput)(struct dentry *, struct inode *);
char *(*d_dname)(struct dentry *, char *, int);
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(struct dentry *, bool);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
unsigned int);
};

2
arch/powerpc/oprofile/cell/spu_task_sync.c
View File

@ -295,7 +295,7 @@ out:
* dcookie user still being registered (namely, the reader
* of the event buffer).
*/
static inline unsigned long fast_get_dcookie(struct path *path)
static inline unsigned long fast_get_dcookie(const struct path *path)
{
unsigned long cookie;

2
drivers/oprofile/buffer_sync.c
View File

@ -206,7 +206,7 @@ void sync_stop(void)
* because we cannot reach this code without at least one
* dcookie user still being registered (namely, the reader
* of the event buffer). */
static inline unsigned long fast_get_dcookie(struct path *path)
static inline unsigned long fast_get_dcookie(const struct path *path)
{
unsigned long cookie;

15
fs/9p/vfs_addr.c
View File

@ -310,18 +310,10 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping,
p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping);
if (unlikely(copied < len)) {
/*
* zero out the rest of the area
*/
unsigned from = pos & (PAGE_SIZE - 1);
zero_user(page, from + copied, len - copied);
flush_dcache_page(page);
if (unlikely(copied < len && !PageUptodate(page))) {
copied = 0;
goto out;
}
if (!PageUptodate(page))
SetPageUptodate(page);
/*
* No need to use i_size_read() here, the i_size
* cannot change under us because we hold the i_mutex.
@ -331,6 +323,7 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping,
i_size_write(inode, last_pos);
}
set_page_dirty(page);
out:
unlock_page(page);
put_page(page);

5
fs/autofs4/autofs_i.h
View File

@ -145,7 +145,7 @@ void autofs4_free_ino(struct autofs_info *);
/* Expiration */
int is_autofs4_dentry(struct dentry *);
int autofs4_expire_wait(struct dentry *dentry, int rcu_walk);
int autofs4_expire_wait(const struct path *path, int rcu_walk);
int autofs4_expire_run(struct super_block *, struct vfsmount *,
struct autofs_sb_info *,
struct autofs_packet_expire __user *);
@ -217,7 +217,8 @@ static inline int autofs_prepare_pipe(struct file *pipe)
/* Queue management functions */
int autofs4_wait(struct autofs_sb_info *, struct dentry *, enum autofs_notify);
int autofs4_wait(struct autofs_sb_info *,
const struct path *, enum autofs_notify);
int autofs4_wait_release(struct autofs_sb_info *, autofs_wqt_t, int);
void autofs4_catatonic_mode(struct autofs_sb_info *);

10
fs/autofs4/dev-ioctl.c
View File

@ -204,7 +204,7 @@ static int autofs_dev_ioctl_protosubver(struct file *fp,
/* Find the topmost mount satisfying test() */
static int find_autofs_mount(const char *pathname,
struct path *res,
int test(struct path *path, void *data),
int test(const struct path *path, void *data),
void *data)
{
struct path path;
@ -230,12 +230,12 @@ static int find_autofs_mount(const char *pathname,
return err;
}
static int test_by_dev(struct path *path, void *p)
static int test_by_dev(const struct path *path, void *p)
{
return path->dentry->d_sb->s_dev == *(dev_t *)p;
}
static int test_by_type(struct path *path, void *p)
static int test_by_type(const struct path *path, void *p)
{
struct autofs_info *ino = autofs4_dentry_ino(path->dentry);
@ -468,7 +468,7 @@ static int autofs_dev_ioctl_requester(struct file *fp,
ino = autofs4_dentry_ino(path.dentry);
if (ino) {
err = 0;
autofs4_expire_wait(path.dentry, 0);
autofs4_expire_wait(&path, 0);
spin_lock(&sbi->fs_lock);
param->requester.uid =
from_kuid_munged(current_user_ns(), ino->uid);
@ -575,7 +575,7 @@ static int autofs_dev_ioctl_ismountpoint(struct file *fp,
devid = new_encode_dev(dev);
err = have_submounts(path.dentry);
err = path_has_submounts(&path);
if (follow_down_one(&path))
magic = path.dentry->d_sb->s_magic;

19
fs/autofs4/expire.c
View File

@ -310,26 +310,29 @@ struct dentry *autofs4_expire_direct(struct super_block *sb,
now = jiffies;
timeout = sbi->exp_timeout;
if (!autofs4_direct_busy(mnt, root, timeout, do_now)) {
spin_lock(&sbi->fs_lock);
ino = autofs4_dentry_ino(root);
/* No point expiring a pending mount */
if (ino->flags & AUTOFS_INF_PENDING)
if (ino->flags & AUTOFS_INF_PENDING) {
spin_unlock(&sbi->fs_lock);
goto out;
if (!autofs4_direct_busy(mnt, root, timeout, do_now)) {
}
ino->flags |= AUTOFS_INF_WANT_EXPIRE;
spin_unlock(&sbi->fs_lock);
synchronize_rcu();
spin_lock(&sbi->fs_lock);
if (!autofs4_direct_busy(mnt, root, timeout, do_now)) {
spin_lock(&sbi->fs_lock);
ino->flags |= AUTOFS_INF_EXPIRING;
init_completion(&ino->expire_complete);
spin_unlock(&sbi->fs_lock);
return root;
}
spin_lock(&sbi->fs_lock);
ino->flags &= ~AUTOFS_INF_WANT_EXPIRE;
spin_unlock(&sbi->fs_lock);
}
out:
spin_unlock(&sbi->fs_lock);
dput(root);
return NULL;
@ -495,8 +498,9 @@ found:
return expired;
}
int autofs4_expire_wait(struct dentry *dentry, int rcu_walk)
int autofs4_expire_wait(const struct path *path, int rcu_walk)
{
struct dentry *dentry = path->dentry;
struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
struct autofs_info *ino = autofs4_dentry_ino(dentry);
int status;
@ -525,7 +529,7 @@ retry:
pr_debug("waiting for expire %p name=%pd\n", dentry, dentry);
status = autofs4_wait(sbi, dentry, NFY_NONE);
status = autofs4_wait(sbi, path, NFY_NONE);
wait_for_completion(&ino->expire_complete);
pr_debug("expire done status=%d\n", status);
@ -592,11 +596,12 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
if (dentry) {
struct autofs_info *ino = autofs4_dentry_ino(dentry);
const struct path path = { .mnt = mnt, .dentry = dentry };
/* This is synchronous because it makes the daemon a
* little easier
*/
ret = autofs4_wait(sbi, dentry, NFY_EXPIRE);
ret = autofs4_wait(sbi, &path, NFY_EXPIRE);
spin_lock(&sbi->fs_lock);
/* avoid rapid-fire expire attempts if expiry fails */

61
fs/autofs4/root.c
View File

@ -32,7 +32,7 @@ static int autofs4_dir_open(struct inode *inode, struct file *file);
static struct dentry *autofs4_lookup(struct inode *,
struct dentry *, unsigned int);
static struct vfsmount *autofs4_d_automount(struct path *);
static int autofs4_d_manage(struct dentry *, bool);
static int autofs4_d_manage(const struct path *, bool);
static void autofs4_dentry_release(struct dentry *);
const struct file_operations autofs4_root_operations = {
@ -123,7 +123,7 @@ static int autofs4_dir_open(struct inode *inode, struct file *file)
* it.
*/
spin_lock(&sbi->lookup_lock);
if (!d_mountpoint(dentry) && simple_empty(dentry)) {
if (!path_is_mountpoint(&file->f_path) && simple_empty(dentry)) {
spin_unlock(&sbi->lookup_lock);
return -ENOENT;
}
@ -269,39 +269,41 @@ next:
return NULL;
}
static int autofs4_mount_wait(struct dentry *dentry, bool rcu_walk)
static int autofs4_mount_wait(const struct path *path, bool rcu_walk)
{
struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
struct autofs_info *ino = autofs4_dentry_ino(dentry);
struct autofs_sb_info *sbi = autofs4_sbi(path->dentry->d_sb);
struct autofs_info *ino = autofs4_dentry_ino(path->dentry);
int status = 0;
if (ino->flags & AUTOFS_INF_PENDING) {
if (rcu_walk)
return -ECHILD;
pr_debug("waiting for mount name=%pd\n", dentry);
status = autofs4_wait(sbi, dentry, NFY_MOUNT);
pr_debug("waiting for mount name=%pd\n", path->dentry);
status = autofs4_wait(sbi, path, NFY_MOUNT);
pr_debug("mount wait done status=%d\n", status);
}
ino->last_used = jiffies;
return status;
}
static int do_expire_wait(struct dentry *dentry, bool rcu_walk)
static int do_expire_wait(const struct path *path, bool rcu_walk)
{
struct dentry *dentry = path->dentry;
struct dentry *expiring;
expiring = autofs4_lookup_expiring(dentry, rcu_walk);
if (IS_ERR(expiring))
return PTR_ERR(expiring);
if (!expiring)
return autofs4_expire_wait(dentry, rcu_walk);
return autofs4_expire_wait(path, rcu_walk);
else {
const struct path this = { .mnt = path->mnt, .dentry = expiring };
/*
* If we are racing with expire the request might not
* be quite complete, but the directory has been removed
* so it must have been successful, just wait for it.
*/
autofs4_expire_wait(expiring, 0);
autofs4_expire_wait(&this, 0);
autofs4_del_expiring(expiring);
dput(expiring);
}
@ -354,7 +356,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
* and the directory was removed, so just go ahead and try
* the mount.
*/
status = do_expire_wait(dentry, 0);
status = do_expire_wait(path, 0);
if (status && status != -EAGAIN)
return NULL;
@ -362,7 +364,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
spin_lock(&sbi->fs_lock);
if (ino->flags & AUTOFS_INF_PENDING) {
spin_unlock(&sbi->fs_lock);
status = autofs4_mount_wait(dentry, 0);
status = autofs4_mount_wait(path, 0);
if (status)
return ERR_PTR(status);
goto done;
@ -370,28 +372,28 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
/*
* If the dentry is a symlink it's equivalent to a directory
* having d_mountpoint() true, so there's no need to call back
* to the daemon.
* having path_is_mountpoint() true, so there's no need to call
* back to the daemon.
*/
if (d_really_is_positive(dentry) && d_is_symlink(dentry)) {
spin_unlock(&sbi->fs_lock);
goto done;
}
if (!d_mountpoint(dentry)) {
if (!path_is_mountpoint(path)) {
/*
* It's possible that user space hasn't removed directories
* after umounting a rootless multi-mount, although it
* should. For v5 have_submounts() is sufficient to handle
* this because the leaves of the directory tree under the
* mount never trigger mounts themselves (they have an autofs
* trigger mount mounted on them). But v4 pseudo direct mounts
* do need the leaves to trigger mounts. In this case we
* have no choice but to use the list_empty() check and
* should. For v5 path_has_submounts() is sufficient to
* handle this because the leaves of the directory tree under
* the mount never trigger mounts themselves (they have an
* autofs trigger mount mounted on them). But v4 pseudo direct
* mounts do need the leaves to trigger mounts. In this case
* we have no choice but to use the list_empty() check and
* require user space behave.
*/
if (sbi->version > 4) {
if (have_submounts(dentry)) {
if (path_has_submounts(path)) {
spin_unlock(&sbi->fs_lock);
goto done;
}
@ -403,7 +405,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
}
ino->flags |= AUTOFS_INF_PENDING;
spin_unlock(&sbi->fs_lock);
status = autofs4_mount_wait(dentry, 0);
status = autofs4_mount_wait(path, 0);
spin_lock(&sbi->fs_lock);
ino->flags &= ~AUTOFS_INF_PENDING;
if (status) {
@ -421,8 +423,9 @@ done:
return NULL;
}
static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
static int autofs4_d_manage(const struct path *path, bool rcu_walk)
{
struct dentry *dentry = path->dentry;
struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
struct autofs_info *ino = autofs4_dentry_ino(dentry);
int status;
@ -431,20 +434,20 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
/* The daemon never waits. */
if (autofs4_oz_mode(sbi)) {
if (!d_mountpoint(dentry))
if (!path_is_mountpoint(path))
return -EISDIR;
return 0;
}
/* Wait for pending expires */
if (do_expire_wait(dentry, rcu_walk) == -ECHILD)
if (do_expire_wait(path, rcu_walk) == -ECHILD)
return -ECHILD;
/*
* This dentry may be under construction so wait on mount
* completion.
*/
status = autofs4_mount_wait(dentry, rcu_walk);
status = autofs4_mount_wait(path, rcu_walk);
if (status)
return status;
@ -460,7 +463,7 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
if (ino->flags & AUTOFS_INF_WANT_EXPIRE)
return 0;
if (d_mountpoint(dentry))
if (path_is_mountpoint(path))
return 0;
inode = d_inode_rcu(dentry);
if (inode && S_ISLNK(inode->i_mode))
@ -487,7 +490,7 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
* we can avoid needless calls ->d_automount() and avoid
* an incorrect ELOOP error return.
*/
if ((!d_mountpoint(dentry) && !simple_empty(dentry)) ||
if ((!path_is_mountpoint(path) && !simple_empty(dentry)) ||
(d_really_is_positive(dentry) && d_is_symlink(dentry)))
status = -EISDIR;
}

13
fs/autofs4/waitq.c
View File

@ -250,8 +250,9 @@ autofs4_find_wait(struct autofs_sb_info *sbi, const struct qstr *qstr)
static int validate_request(struct autofs_wait_queue **wait,
struct autofs_sb_info *sbi,
const struct qstr *qstr,
struct dentry *dentry, enum autofs_notify notify)
const struct path *path, enum autofs_notify notify)
{
struct dentry *dentry = path->dentry;
struct autofs_wait_queue *wq;
struct autofs_info *ino;
@ -314,6 +315,7 @@ static int validate_request(struct autofs_wait_queue **wait,
*/
if (notify == NFY_MOUNT) {
struct dentry *new = NULL;
struct path this;
int valid = 1;
/*
@ -333,7 +335,9 @@ static int validate_request(struct autofs_wait_queue **wait,
dentry = new;
}
}
if (have_submounts(dentry))
this.mnt = path->mnt;
this.dentry = dentry;
if (path_has_submounts(&this))
valid = 0;
if (new)
@ -345,8 +349,9 @@ static int validate_request(struct autofs_wait_queue **wait,
}
int autofs4_wait(struct autofs_sb_info *sbi,
struct dentry *dentry, enum autofs_notify notify)
const struct path *path, enum autofs_notify notify)
{
struct dentry *dentry = path->dentry;
struct autofs_wait_queue *wq;
struct qstr qstr;
char *name;
@ -405,7 +410,7 @@ int autofs4_wait(struct autofs_sb_info *sbi,
return -EINTR;
}
ret = validate_request(&wq, sbi, &qstr, dentry, notify);
ret = validate_request(&wq, sbi, &qstr, path, notify);
if (ret <= 0) {
if (ret != -EINTR)
mutex_unlock(&sbi->wq_mutex);

3
fs/btrfs/ctree.h
View File

@ -3232,9 +3232,6 @@ int btrfs_dirty_pages(struct inode *inode, struct page **pages,
size_t num_pages, loff_t pos, size_t write_bytes,
struct extent_state **cached);
int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out,
size_t len, unsigned int flags);
int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out, u64 len);

1
fs/btrfs/file.c
View File

@ -3033,7 +3033,6 @@ const struct file_operations btrfs_file_operations = {
#ifdef CONFIG_COMPAT
.compat_ioctl = btrfs_compat_ioctl,
#endif
.copy_file_range = btrfs_copy_file_range,
.clone_file_range = btrfs_clone_file_range,
.dedupe_file_range = btrfs_dedupe_file_range,
};

14
fs/btrfs/ioctl.c
View File

@ -834,7 +834,7 @@ static inline int btrfs_may_create(struct inode *dir, struct dentry *child)
* sys_mkdirat and vfs_mkdir, but we only do a single component lookup
* inside this filesystem so it's quite a bit simpler.
*/
static noinline int btrfs_mksubvol(struct path *parent,
static noinline int btrfs_mksubvol(const struct path *parent,
char *name, int namelen,
struct btrfs_root *snap_src,
u64 *async_transid, bool readonly,
@ -3987,18 +3987,6 @@ out_unlock:
return ret;
}
ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out,
size_t len, unsigned int flags)
{
ssize_t ret;
ret = btrfs_clone_files(file_out, file_in, pos_in, len, pos_out);
if (ret == 0)
ret = len;
return ret;
}
int btrfs_clone_file_range(struct file *src_file, loff_t off,
struct file *dst_file, loff_t destoff, u64 len)
{

14
fs/ceph/addr.c
View File

@ -1317,25 +1317,27 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
struct page *page, void *fsdata)
{
struct inode *inode = file_inode(file);
unsigned from = pos & (PAGE_SIZE - 1);
int check_cap = 0;
dout("write_end file %p inode %p page %p %d~%d (%d)\n", file,
inode, page, (int)pos, (int)copied, (int)len);
/* zero the stale part of the page if we did a short copy */
if (copied < len)
zero_user_segment(page, from+copied, len);
if (!PageUptodate(page)) {
if (copied < len) {
copied = 0;
goto out;
}
SetPageUptodate(page);
}
/* did file size increase? */
if (pos+copied > i_size_read(inode))
check_cap = ceph_inode_set_size(inode, pos+copied);
if (!PageUptodate(page))
SetPageUptodate(page);
set_page_dirty(page);
out:
unlock_page(page);
put_page(page);

40
fs/dcache.c
View File

@ -1273,38 +1273,44 @@ rename_retry:
goto again;
}
/*
* Search for at least 1 mount point in the dentry's subdirs.
* We descend to the next level whenever the d_subdirs
* list is non-empty and continue searching.
*/
struct check_mount {
struct vfsmount *mnt;
unsigned int mounted;
};
static enum d_walk_ret check_mount(void *data, struct dentry *dentry)
static enum d_walk_ret path_check_mount(void *data, struct dentry *dentry)
{
int *ret = data;
if (d_mountpoint(dentry)) {
*ret = 1;
struct check_mount *info = data;
struct path path = { .mnt = info->mnt, .dentry = dentry };
if (likely(!d_mountpoint(dentry)))
return D_WALK_CONTINUE;
if (__path_is_mountpoint(&path)) {
info->mounted = 1;
return D_WALK_QUIT;
}
return D_WALK_CONTINUE;
}
/**
* have_submounts - check for mounts over a dentry
* @parent: dentry to check.
* path_has_submounts - check for mounts over a dentry in the
* current namespace.
* @parent: path to check.
*
* Return true if the parent or its subdirectories contain
* a mount point
* a mount point in the current namespace.
*/
int have_submounts(struct dentry *parent)
int path_has_submounts(const struct path *parent)
{
int ret = 0;
struct check_mount data = { .mnt = parent->mnt, .mounted = 0 };
d_walk(parent, &ret, check_mount, NULL);
read_seqlock_excl(&mount_lock);
d_walk(parent->dentry, &data, path_check_mount, NULL);
read_sequnlock_excl(&mount_lock);
return ret;
return data.mounted;
}
EXPORT_SYMBOL(have_submounts);
EXPORT_SYMBOL(path_has_submounts);
/*
* Called by mount code to set a mountpoint and check if the mountpoint is

4
fs/dcookies.c
View File

@ -90,7 +90,7 @@ static void hash_dcookie(struct dcookie_struct * dcs)
}
static struct dcookie_struct *alloc_dcookie(struct path *path)
static struct dcookie_struct *alloc_dcookie(const struct path *path)
{
struct dcookie_struct *dcs = kmem_cache_alloc(dcookie_cache,
GFP_KERNEL);
@ -113,7 +113,7 @@ static struct dcookie_struct *alloc_dcookie(struct path *path)
/* This is the main kernel-side routine that retrieves the cookie
* value for a dentry/vfsmnt pair.
*/
int get_dcookie(struct path *path, unsigned long *cookie)
int get_dcookie(const struct path *path, unsigned long *cookie)
{
int err = 0;
struct dcookie_struct * dcs;

58
fs/exofs/inode.c
View File

@ -870,46 +870,31 @@ int exofs_write_begin(struct file *file, struct address_space *mapping,
page = *pagep;
if (page == NULL) {
ret = simple_write_begin(file, mapping, pos, len, flags, pagep,
fsdata);
if (ret) {
EXOFS_DBGMSG("simple_write_begin failed\n");
goto out;
page = grab_cache_page_write_begin(mapping, pos >> PAGE_SHIFT,
flags);
if (!page) {
EXOFS_DBGMSG("grab_cache_page_write_begin failed\n");
return -ENOMEM;
}
page = *pagep;
*pagep = page;
}
/* read modify write */
if (!PageUptodate(page) && (len != PAGE_SIZE)) {
loff_t i_size = i_size_read(mapping->host);
pgoff_t end_index = i_size >> PAGE_SHIFT;
size_t rlen;
if (page->index < end_index)
rlen = PAGE_SIZE;
else if (page->index == end_index)
rlen = i_size & ~PAGE_MASK;
else
rlen = 0;
if (!rlen) {
if (page->index > end_index) {
clear_highpage(page);
SetPageUptodate(page);
goto out;
}
} else {
ret = _readpage(page, true);
if (ret) {
/*SetPageError was done by _readpage. Is it ok?*/
unlock_page(page);
EXOFS_DBGMSG("__readpage failed\n");
}
}
out:
if (unlikely(ret))
_write_failed(mapping->host, pos + len);
}
return ret;
}
@ -929,18 +914,25 @@ static int exofs_write_end(struct file *file, struct address_space *mapping,
struct page *page, void *fsdata)
{
struct inode *inode = mapping->host;
/* According to comment in simple_write_end i_mutex is held */
loff_t i_size = inode->i_size;
int ret;
loff_t last_pos = pos + copied;
ret = simple_write_end(file, mapping,pos, len, copied, page, fsdata);
if (unlikely(ret))
if (!PageUptodate(page)) {
if (copied < len) {
_write_failed(inode, pos + len);
/* TODO: once simple_write_end marks inode dirty remove */
if (i_size != inode->i_size)
copied = 0;
goto out;
}
SetPageUptodate(page);
}
if (last_pos > inode->i_size) {
i_size_write(inode, last_pos);
mark_inode_dirty(inode);
return ret;
}
set_page_dirty(page);
out:
unlock_page(page);
put_page(page);
return copied;
}
static int exofs_releasepage(struct page *page, gfp_t gfp)

4
fs/ext4/super.c
View File

@ -1205,7 +1205,7 @@ static int ext4_release_dquot(struct dquot *dquot);
static int ext4_mark_dquot_dirty(struct dquot *dquot);
static int ext4_write_info(struct super_block *sb, int type);
static int ext4_quota_on(struct super_block *sb, int type, int format_id,
struct path *path);
const struct path *path);
static int ext4_quota_off(struct super_block *sb, int type);
static int ext4_quota_on_mount(struct super_block *sb, int type);
static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
@ -5293,7 +5293,7 @@ static void lockdep_set_quota_inode(struct inode *inode, int subclass)
* Standard function to be called on quota_on
*/
static int ext4_quota_on(struct super_block *sb, int type, int format_id,
struct path *path)
const struct path *path)
{
int err;

2
fs/file_table.c
View File

@ -155,7 +155,7 @@ over:
* @mode: the mode with which the new file will be opened
* @fop: the 'struct file_operations' for the new file
*/
struct file *alloc_file(struct path *path, fmode_t mode,
struct file *alloc_file(const struct path *path, fmode_t mode,
const struct file_operations *fop)
{
struct file *file;

4
fs/gfs2/aops.c
View File

@ -839,12 +839,10 @@ static int gfs2_stuffed_write_end(struct inode *inode, struct buffer_head *dibh,
BUG_ON((pos + len) > (dibh->b_size - sizeof(struct gfs2_dinode)));
kaddr = kmap_atomic(page);
memcpy(buf + pos, kaddr + pos, copied);
memset(kaddr + pos + copied, 0, len - copied);
flush_dcache_page(page);
kunmap_atomic(kaddr);
if (!PageUptodate(page))
SetPageUptodate(page);
WARN_ON(!PageUptodate(page));
unlock_page(page);
put_page(page);

2
fs/internal.h
View File

@ -62,7 +62,7 @@ extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
extern void *copy_mount_options(const void __user *);
extern char *copy_mount_string(const void __user *);
extern struct vfsmount *lookup_mnt(struct path *);
extern struct vfsmount *lookup_mnt(const struct path *);
extern int finish_automount(struct vfsmount *, struct path *);
extern int sb_prepare_remount_readonly(struct super_block *);

6
fs/libfs.c
View File

@ -465,6 +465,8 @@ EXPORT_SYMBOL(simple_write_begin);
* is not called, so a filesystem that actually does store data in .write_inode
* should extend on what's done here with a call to mark_inode_dirty() in the
* case that i_size has changed.
*
* Use *ONLY* with simple_readpage()
*/
int simple_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
@ -474,14 +476,14 @@ int simple_write_end(struct file *file, struct address_space *mapping,
loff_t last_pos = pos + copied;
/* zero the stale part of the page if we did a short copy */
if (!PageUptodate(page)) {
if (copied < len) {
unsigned from = pos & (PAGE_SIZE - 1);
zero_user(page, from + copied, len - copied);
}
if (!PageUptodate(page))
SetPageUptodate(page);
}
/*
* No need to use i_size_read() here, the i_size
* cannot change under us because we hold the i_mutex.

6
fs/mount.h
View File

@ -94,6 +94,12 @@ extern struct mount *__lookup_mnt_last(struct vfsmount *, struct dentry *);
extern int __legitimize_mnt(struct vfsmount *, unsigned);
extern bool legitimize_mnt(struct vfsmount *, unsigned);
static inline bool __path_is_mountpoint(const struct path *path)
{
struct mount *m = __lookup_mnt(path->mnt, path->dentry);
return m && likely(!(m->mnt.mnt_flags & MNT_SYNC_UMOUNT));
}
extern void __detach_mounts(struct dentry *dentry);
static inline void detach_mounts(struct dentry *dentry)

17
fs/namei.c
View File

@ -1200,7 +1200,7 @@ static int follow_managed(struct path *path, struct nameidata *nd)
if (managed & DCACHE_MANAGE_TRANSIT) {
BUG_ON(!path->dentry->d_op);
BUG_ON(!path->dentry->d_op->d_manage);
ret = path->dentry->d_op->d_manage(path->dentry, false);
ret = path->dentry->d_op->d_manage(path, false);
if (ret < 0)
break;
}
@ -1263,10 +1263,10 @@ int follow_down_one(struct path *path)
}
EXPORT_SYMBOL(follow_down_one);
static inline int managed_dentry_rcu(struct dentry *dentry)
static inline int managed_dentry_rcu(const struct path *path)
{
return (dentry->d_flags & DCACHE_MANAGE_TRANSIT) ?
dentry->d_op->d_manage(dentry, true) : 0;
return (path->dentry->d_flags & DCACHE_MANAGE_TRANSIT) ?
path->dentry->d_op->d_manage(path, true) : 0;
}
/*
@ -1282,7 +1282,7 @@ static bool __follow_mount_rcu(struct nameidata *nd, struct path *path,
* Don't forget we might have a non-mountpoint managed dentry
* that wants to block transit.
*/
switch (managed_dentry_rcu(path->dentry)) {
switch (managed_dentry_rcu(path)) {
case -ECHILD:
default:
return false;
@ -1392,8 +1392,7 @@ int follow_down(struct path *path)
if (managed & DCACHE_MANAGE_TRANSIT) {
BUG_ON(!path->dentry->d_op);
BUG_ON(!path->dentry->d_op->d_manage);
ret = path->dentry->d_op->d_manage(
path->dentry, false);
ret = path->dentry->d_op->d_manage(path, false);
if (ret < 0)
return ret == -EISDIR ? 0 : ret;
}
@ -2863,7 +2862,7 @@ bool may_open_dev(const struct path *path)
!(path->mnt->mnt_sb->s_iflags & SB_I_NODEV);
}
static int may_open(struct path *path, int acc_mode, int flag)
static int may_open(const struct path *path, int acc_mode, int flag)
{
struct dentry *dentry = path->dentry;
struct inode *inode = dentry->d_inode;
@ -2913,7 +2912,7 @@ static int may_open(struct path *path, int acc_mode, int flag)
static int handle_truncate(struct file *filp)
{
struct path *path = &filp->f_path;
const struct path *path = &filp->f_path;
struct inode *inode = path->dentry->d_inode;
int error = get_write_access(inode);
if (error)

39
fs/namespace.c
View File

@ -678,7 +678,7 @@ out:
*
* lookup_mnt takes a reference to the found vfsmount.
*/
struct vfsmount *lookup_mnt(struct path *path)
struct vfsmount *lookup_mnt(const struct path *path)
{
struct mount *child_mnt;
struct vfsmount *m;
@ -1159,7 +1159,36 @@ struct vfsmount *mntget(struct vfsmount *mnt)
}
EXPORT_SYMBOL(mntget);
struct vfsmount *mnt_clone_internal(struct path *path)
/* path_is_mountpoint() - Check if path is a mount in the current
* namespace.
*
* d_mountpoint() can only be used reliably to establish if a dentry is
* not mounted in any namespace and that common case is handled inline.
* d_mountpoint() isn't aware of the possibility there may be multiple
* mounts using a given dentry in a different namespace. This function
* checks if the passed in path is a mountpoint rather than the dentry
* alone.
*/
bool path_is_mountpoint(const struct path *path)
{
unsigned seq;
bool res;
if (!d_mountpoint(path->dentry))
return false;
rcu_read_lock();
do {
seq = read_seqbegin(&mount_lock);
res = __path_is_mountpoint(path);
} while (read_seqretry(&mount_lock, seq));
rcu_read_unlock();
return res;
}
EXPORT_SYMBOL(path_is_mountpoint);
struct vfsmount *mnt_clone_internal(const struct path *path)
{
struct mount *p;
p = clone_mnt(real_mount(path->mnt), path->dentry, CL_PRIVATE);
@ -1758,7 +1787,7 @@ out:
/* Caller should check returned pointer for errors */
struct vfsmount *collect_mounts(struct path *path)
struct vfsmount *collect_mounts(const struct path *path)
{
struct mount *tree;
namespace_lock();
@ -1791,7 +1820,7 @@ void drop_collected_mounts(struct vfsmount *mnt)
*
* Release with mntput().
*/
struct vfsmount *clone_private_mount(struct path *path)
struct vfsmount *clone_private_mount(const struct path *path)
{
struct mount *old_mnt = real_mount(path->mnt);
struct mount *new_mnt;
@ -2997,7 +3026,7 @@ bool is_path_reachable(struct mount *mnt, struct dentry *dentry,
return &mnt->mnt == root->mnt && is_subdir(dentry, root->dentry);
}
bool path_is_under(struct path *path1, struct path *path2)
bool path_is_under(const struct path *path1, const struct path *path2)
{
bool res;
read_seqlock_excl(&mount_lock);

2
fs/nfs/file.c
View File

@ -377,7 +377,7 @@ static int nfs_write_end(struct file *file, struct address_space *mapping,
*/
if (!PageUptodate(page)) {
unsigned pglen = nfs_page_length(page);
unsigned end = offset + len;
unsigned end = offset + copied;
if (pglen == 0) {
zero_user_segments(page, 0, offset,

2
fs/notify/dnotify/dnotify.c
View File

@ -85,7 +85,7 @@ static int dnotify_handle_event(struct fsnotify_group *group,
struct inode *inode,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
u32 mask, void *data, int data_type,
u32 mask, const void *data, int data_type,
const unsigned char *file_name, u32 cookie)
{
struct dnotify_mark *dn_mark;

8
fs/notify/fanotify/fanotify.c
View File

@ -90,10 +90,10 @@ static int fanotify_get_response(struct fsnotify_group *group,
static bool fanotify_should_send_event(struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmnt_mark,
u32 event_mask,
void *data, int data_type)
const void *data, int data_type)
{
__u32 marks_mask, marks_ignored_mask;
struct path *path = data;
const struct path *path = data;
pr_debug("%s: inode_mark=%p vfsmnt_mark=%p mask=%x data=%p"
" data_type=%d\n", __func__, inode_mark, vfsmnt_mark,
@ -140,7 +140,7 @@ static bool fanotify_should_send_event(struct fsnotify_mark *inode_mark,
}
struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
struct path *path)
const struct path *path)
{
struct fanotify_event_info *event;
@ -177,7 +177,7 @@ static int fanotify_handle_event(struct fsnotify_group *group,
struct inode *inode,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *fanotify_mark,
u32 mask, void *data, int data_type,
u32 mask, const void *data, int data_type,
const unsigned char *file_name, u32 cookie)
{
int ret = 0;

2
fs/notify/fanotify/fanotify.h
View File

@ -47,4 +47,4 @@ static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse)
}
struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
struct path *path);
const struct path *path);

8
fs/notify/fsnotify.c
View File

@ -86,7 +86,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
}
/* Notify this dentry's parent about a child's events. */
int __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask)
{
struct dentry *parent;
struct inode *p_inode;
@ -125,7 +125,7 @@ EXPORT_SYMBOL_GPL(__fsnotify_parent);
static int send_to_group(struct inode *to_tell,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data,
__u32 mask, const void *data,
int data_is, u32 cookie,
const unsigned char *file_name)
{
@ -187,7 +187,7 @@ static int send_to_group(struct inode *to_tell,
* out to all of the registered fsnotify_group. Those groups can then use the
* notification event in whatever means they feel necessary.
*/
int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
const unsigned char *file_name, u32 cookie)
{
struct hlist_node *inode_node = NULL, *vfsmount_node = NULL;
@ -199,7 +199,7 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
__u32 test_mask = (mask & ~FS_EVENT_ON_CHILD);
if (data_is == FSNOTIFY_EVENT_PATH)
mnt = real_mount(((struct path *)data)->mnt);
mnt = real_mount(((const struct path *)data)->mnt);
else
mnt = NULL;

2
fs/notify/inotify/inotify.h
View File

@ -26,7 +26,7 @@ extern int inotify_handle_event(struct fsnotify_group *group,
struct inode *inode,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
u32 mask, void *data, int data_type,
u32 mask, const void *data, int data_type,
const unsigned char *file_name, u32 cookie);
extern const struct fsnotify_ops inotify_fsnotify_ops;

4
fs/notify/inotify/inotify_fsnotify.c
View File

@ -66,7 +66,7 @@ int inotify_handle_event(struct fsnotify_group *group,
struct inode *inode,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
u32 mask, void *data, int data_type,
u32 mask, const void *data, int data_type,
const unsigned char *file_name, u32 cookie)
{
struct inotify_inode_mark *i_mark;
@ -80,7 +80,7 @@ int inotify_handle_event(struct fsnotify_group *group,
if ((inode_mark->mask & FS_EXCL_UNLINK) &&
(data_type == FSNOTIFY_EVENT_PATH)) {
struct path *path = data;
const struct path *path = data;
if (d_unlinked(path->dentry))
return 0;

7
fs/ocfs2/alloc.c
View File

@ -5194,7 +5194,7 @@ int ocfs2_change_extent_flag(handle_t *handle,
rec = &el->l_recs[index];
if (new_flags && (rec->e_flags & new_flags)) {
mlog(ML_ERROR, "Owner %llu tried to set %d flags on an "
"extent that already had them",
"extent that already had them\n",
(unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
new_flags);
goto out;
@ -5202,7 +5202,7 @@ int ocfs2_change_extent_flag(handle_t *handle,
if (clear_flags && !(rec->e_flags & clear_flags)) {
mlog(ML_ERROR, "Owner %llu tried to clear %d flags on an "
"extent that didn't have them",
"extent that didn't have them\n",
(unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
clear_flags);
goto out;
@ -5713,8 +5713,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
struct ocfs2_refcount_tree *ref_tree = NULL;
if ((flags & OCFS2_EXT_REFCOUNTED) && len) {
BUG_ON(!(OCFS2_I(inode)->ip_dyn_features &
OCFS2_HAS_REFCOUNT_FL));
BUG_ON(!ocfs2_is_refcount_inode(inode));
if (!refcount_tree_locked) {
ret = ocfs2_lock_refcount_tree(osb, refcount_loc, 1,

25
fs/ocfs2/aops.c
View File

@ -464,6 +464,15 @@ static sector_t ocfs2_bmap(struct address_space *mapping, sector_t block)
trace_ocfs2_bmap((unsigned long long)OCFS2_I(inode)->ip_blkno,
(unsigned long long)block);
/*
* The swap code (ab-)uses ->bmap to get a block mapping and then
* bypasseѕ the file system for actual I/O. We really can't allow
* that on refcounted inodes, so we have to skip out here. And yes,
* 0 is the magic code for a bmap error..
*/
if (ocfs2_is_refcount_inode(inode))
return 0;
/* We don't need to lock journal system files, since they aren't
* accessed concurrently from multiple nodes.
*/
@ -2253,7 +2262,7 @@ out:
return ret;
}
static void ocfs2_dio_end_io_write(struct inode *inode,
static int ocfs2_dio_end_io_write(struct inode *inode,
struct ocfs2_dio_write_ctxt *dwc,
loff_t offset,
ssize_t bytes)
@ -2307,7 +2316,7 @@ static void ocfs2_dio_end_io_write(struct inode *inode,
mlog_errno(ret);
}
di = (struct ocfs2_dinode *)di_bh;
di = (struct ocfs2_dinode *)di_bh->b_data;
ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
@ -2364,6 +2373,8 @@ out:
if (locked)
inode_unlock(inode);
ocfs2_dio_free_write_ctx(inode, dwc);
return ret;
}
/*
@ -2378,21 +2389,19 @@ static int ocfs2_dio_end_io(struct kiocb *iocb,
{
struct inode *inode = file_inode(iocb->ki_filp);
int level;
if (bytes <= 0)
return 0;
int ret = 0;
/* this io's submitter should not have unlocked this before we could */
BUG_ON(!ocfs2_iocb_is_rw_locked(iocb));
if (private)
ocfs2_dio_end_io_write(inode, private, offset, bytes);
if (bytes > 0 && private)
ret = ocfs2_dio_end_io_write(inode, private, offset, bytes);
ocfs2_iocb_clear_rw_locked(iocb);
level = ocfs2_iocb_rw_locked_level(iocb);
ocfs2_rw_unlock(inode, level);
return 0;
return ret;
}
static ssize_t ocfs2_direct_IO(struct kiocb *iocb, struct iov_iter *iter)

38
fs/ocfs2/file.c
View File

@ -1030,7 +1030,7 @@ int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh,
* Only quota files call this without a bh, and they can't be
* refcounted.
*/
BUG_ON(!di_bh && (oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
BUG_ON(!di_bh && ocfs2_is_refcount_inode(inode));
BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE));
clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
@ -1667,7 +1667,7 @@ static void ocfs2_calc_trunc_pos(struct inode *inode,
*done = ret;
}
static int ocfs2_remove_inode_range(struct inode *inode,
int ocfs2_remove_inode_range(struct inode *inode,
struct buffer_head *di_bh, u64 byte_start,
u64 byte_len)
{
@ -1719,8 +1719,7 @@ static int ocfs2_remove_inode_range(struct inode *inode,
* within one cluster(means is not exactly aligned to clustersize).
*/
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) {
if (ocfs2_is_refcount_inode(inode)) {
ret = ocfs2_cow_file_pos(inode, di_bh, byte_start);
if (ret) {
mlog_errno(ret);
@ -2036,7 +2035,7 @@ int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
struct super_block *sb = inode->i_sb;
if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) ||
!(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) ||
!ocfs2_is_refcount_inode(inode) ||
OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
return 0;
@ -2440,6 +2439,31 @@ out:
return offset;
}
static int ocfs2_file_clone_range(struct file *file_in,
loff_t pos_in,
struct file *file_out,
loff_t pos_out,
u64 len)
{
return ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
len, false);
}
static ssize_t ocfs2_file_dedupe_range(struct file *src_file,
u64 loff,
u64 len,
struct file *dst_file,
u64 dst_loff)
{
int error;
error = ocfs2_reflink_remap_range(src_file, loff, dst_file, dst_loff,
len, true);
if (error)
return error;
return len;
}
const struct inode_operations ocfs2_file_iops = {
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
@ -2479,6 +2503,8 @@ const struct file_operations ocfs2_fops = {
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.fallocate = ocfs2_fallocate,
.clone_file_range = ocfs2_file_clone_range,
.dedupe_file_range = ocfs2_file_dedupe_range,
};
const struct file_operations ocfs2_dops = {
@ -2524,6 +2550,8 @@ const struct file_operations ocfs2_fops_no_plocks = {
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.fallocate = ocfs2_fallocate,
.clone_file_range = ocfs2_file_clone_range,
.dedupe_file_range = ocfs2_file_dedupe_range,
};
const struct file_operations ocfs2_dops_no_plocks = {

3
fs/ocfs2/file.h
View File

@ -82,4 +82,7 @@ int ocfs2_change_file_space(struct file *file, unsigned int cmd,
int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
size_t count);
int ocfs2_remove_inode_range(struct inode *inode,
struct buffer_head *di_bh, u64 byte_start,
u64 byte_len);
#endif /* OCFS2_FILE_H */

6
fs/ocfs2/inode.h
View File

@ -181,4 +181,10 @@ static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_
return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
}
/* Does this inode have the reflink flag set? */
static inline bool ocfs2_is_refcount_inode(struct inode *inode)
{
return (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
}
#endif /* OCFS2_INODE_H */

10
fs/ocfs2/move_extents.c
View File

@ -235,10 +235,7 @@ static int ocfs2_defrag_extent(struct ocfs2_move_extents_context *context,
u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
if ((ext_flags & OCFS2_EXT_REFCOUNTED) && *len) {
BUG_ON(!(OCFS2_I(inode)->ip_dyn_features &
OCFS2_HAS_REFCOUNT_FL));
BUG_ON(!ocfs2_is_refcount_inode(inode));
BUG_ON(!context->refcount_loc);
ret = ocfs2_lock_refcount_tree(osb, context->refcount_loc, 1,
@ -581,10 +578,7 @@ static int ocfs2_move_extent(struct ocfs2_move_extents_context *context,
phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
if ((ext_flags & OCFS2_EXT_REFCOUNTED) && len) {
BUG_ON(!(OCFS2_I(inode)->ip_dyn_features &
OCFS2_HAS_REFCOUNT_FL));
BUG_ON(!ocfs2_is_refcount_inode(inode));
BUG_ON(!context->refcount_loc);
ret = ocfs2_lock_refcount_tree(osb, context->refcount_loc, 1,

464
fs/ocfs2/refcounttree.c
View File

@ -34,6 +34,7 @@
#include "xattr.h"
#include "namei.h"
#include "ocfs2_trace.h"
#include "file.h"
#include <linux/bio.h>
#include <linux/blkdev.h>
@ -410,7 +411,7 @@ static int ocfs2_get_refcount_block(struct inode *inode, u64 *ref_blkno)
goto out;
}
BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
BUG_ON(!ocfs2_is_refcount_inode(inode));
di = (struct ocfs2_dinode *)di_bh->b_data;
*ref_blkno = le64_to_cpu(di->i_refcount_loc);
@ -569,7 +570,7 @@ static int ocfs2_create_refcount_tree(struct inode *inode,
u32 num_got;
u64 suballoc_loc, first_blkno;
BUG_ON(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
BUG_ON(ocfs2_is_refcount_inode(inode));
trace_ocfs2_create_refcount_tree(
(unsigned long long)OCFS2_I(inode)->ip_blkno);
@ -707,7 +708,7 @@ static int ocfs2_set_refcount_tree(struct inode *inode,
struct ocfs2_refcount_block *rb;
struct ocfs2_refcount_tree *ref_tree;
BUG_ON(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
BUG_ON(ocfs2_is_refcount_inode(inode));
ret = ocfs2_lock_refcount_tree(osb, refcount_loc, 1,
&ref_tree, &ref_root_bh);
@ -774,7 +775,7 @@ int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh)
u64 blk = 0, bg_blkno = 0, ref_blkno = le64_to_cpu(di->i_refcount_loc);
u16 bit = 0;
if (!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL))
if (!ocfs2_is_refcount_inode(inode))
return 0;
BUG_ON(!ref_blkno);
@ -2298,11 +2299,10 @@ int ocfs2_decrease_refcount(struct inode *inode,
{
int ret;
u64 ref_blkno;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
struct buffer_head *ref_root_bh = NULL;
struct ocfs2_refcount_tree *tree;
BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
BUG_ON(!ocfs2_is_refcount_inode(inode));
ret = ocfs2_get_refcount_block(inode, &ref_blkno);
if (ret) {
@ -2532,7 +2532,6 @@ int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
int *ref_blocks)
{
int ret;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
struct buffer_head *ref_root_bh = NULL;
struct ocfs2_refcount_tree *tree;
u64 start_cpos = ocfs2_blocks_to_clusters(inode->i_sb, phys_blkno);
@ -2543,7 +2542,7 @@ int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
goto out;
}
BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
BUG_ON(!ocfs2_is_refcount_inode(inode));
ret = ocfs2_get_refcount_tree(OCFS2_SB(inode->i_sb),
refcount_loc, &tree);
@ -3411,14 +3410,13 @@ static int ocfs2_refcount_cow_hunk(struct inode *inode,
{
int ret;
u32 cow_start = 0, cow_len = 0;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
struct buffer_head *ref_root_bh = NULL;
struct ocfs2_refcount_tree *ref_tree;
struct ocfs2_cow_context *context = NULL;
BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
BUG_ON(!ocfs2_is_refcount_inode(inode));
ret = ocfs2_refcount_cal_cow_clusters(inode, &di->id2.i_list,
cpos, write_len, max_cpos,
@ -3628,11 +3626,10 @@ int ocfs2_refcount_cow_xattr(struct inode *inode,
{
int ret;
struct ocfs2_xattr_value_root *xv = vb->vb_xv;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
struct ocfs2_cow_context *context = NULL;
u32 cow_start, cow_len;
BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
BUG_ON(!ocfs2_is_refcount_inode(inode));
ret = ocfs2_refcount_cal_cow_clusters(inode, &xv->xr_list,
cpos, write_len, UINT_MAX,
@ -3695,6 +3692,9 @@ int ocfs2_add_refcount_flag(struct inode *inode,
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_alloc_context *meta_ac = NULL;
/* We need to be able to handle at least an extent tree split. */
ref_blocks = ocfs2_extend_meta_needed(data_et->et_root_el);
ret = ocfs2_calc_refcount_meta_credits(inode->i_sb,
ref_ci, ref_root_bh,
p_cluster, num_clusters,
@ -3806,7 +3806,7 @@ static int ocfs2_attach_refcount_tree(struct inode *inode,
ocfs2_init_dealloc_ctxt(&dealloc);
if (!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)) {
if (!ocfs2_is_refcount_inode(inode)) {
ret = ocfs2_create_refcount_tree(inode, di_bh);
if (ret) {
mlog_errno(ret);
@ -3933,6 +3933,13 @@ static int ocfs2_add_refcounted_extent(struct inode *inode,
ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
p_cluster, num_clusters,
meta_ac, dealloc);
if (ret) {
mlog_errno(ret);
goto out_commit;
}
ret = dquot_alloc_space_nodirty(inode,
ocfs2_clusters_to_bytes(osb->sb, num_clusters));
if (ret)
mlog_errno(ret);
@ -4441,3 +4448,434 @@ out:
return error;
}
/* Update destination inode size, if necessary. */
static int ocfs2_reflink_update_dest(struct inode *dest,
struct buffer_head *d_bh,
loff_t newlen)
{
handle_t *handle;
int ret;
dest->i_blocks = ocfs2_inode_sector_count(dest);
if (newlen <= i_size_read(dest))
return 0;
handle = ocfs2_start_trans(OCFS2_SB(dest->i_sb),
OCFS2_INODE_UPDATE_CREDITS);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
mlog_errno(ret);
return ret;
}
/* Extend i_size if needed. */
spin_lock(&OCFS2_I(dest)->ip_lock);
if (newlen > i_size_read(dest))
i_size_write(dest, newlen);
spin_unlock(&OCFS2_I(dest)->ip_lock);
dest->i_ctime = dest->i_mtime = current_time(dest);
ret = ocfs2_mark_inode_dirty(handle, dest, d_bh);
if (ret) {
mlog_errno(ret);
goto out_commit;
}
out_commit:
ocfs2_commit_trans(OCFS2_SB(dest->i_sb), handle);
return ret;
}
/* Remap the range pos_in:len in s_inode to pos_out:len in t_inode. */
static int ocfs2_reflink_remap_extent(struct inode *s_inode,
struct buffer_head *s_bh,
loff_t pos_in,
struct inode *t_inode,
struct buffer_head *t_bh,
loff_t pos_out,
loff_t len,
struct ocfs2_cached_dealloc_ctxt *dealloc)
{
struct ocfs2_extent_tree s_et;
struct ocfs2_extent_tree t_et;
struct ocfs2_dinode *dis;
struct buffer_head *ref_root_bh = NULL;
struct ocfs2_refcount_tree *ref_tree;
struct ocfs2_super *osb;
loff_t pstart, plen;
u32 p_cluster, num_clusters, slast, spos, tpos;
unsigned int ext_flags;
int ret = 0;
osb = OCFS2_SB(s_inode->i_sb);
dis = (struct ocfs2_dinode *)s_bh->b_data;
ocfs2_init_dinode_extent_tree(&s_et, INODE_CACHE(s_inode), s_bh);
ocfs2_init_dinode_extent_tree(&t_et, INODE_CACHE(t_inode), t_bh);
spos = ocfs2_bytes_to_clusters(s_inode->i_sb, pos_in);
tpos = ocfs2_bytes_to_clusters(t_inode->i_sb, pos_out);
slast = ocfs2_clusters_for_bytes(s_inode->i_sb, pos_in + len);
while (spos < slast) {
if (fatal_signal_pending(current)) {
ret = -EINTR;
goto out;
}
/* Look up the extent. */
ret = ocfs2_get_clusters(s_inode, spos, &p_cluster,
&num_clusters, &ext_flags);
if (ret) {
mlog_errno(ret);
goto out;
}
num_clusters = min_t(u32, num_clusters, slast - spos);
/* Punch out the dest range. */
pstart = ocfs2_clusters_to_bytes(t_inode->i_sb, tpos);
plen = ocfs2_clusters_to_bytes(t_inode->i_sb, num_clusters);
ret = ocfs2_remove_inode_range(t_inode, t_bh, pstart, plen);
if (ret) {
mlog_errno(ret);
goto out;
}
if (p_cluster == 0)
goto next_loop;
/* Lock the refcount btree... */
ret = ocfs2_lock_refcount_tree(osb,
le64_to_cpu(dis->i_refcount_loc),
1, &ref_tree, &ref_root_bh);
if (ret) {
mlog_errno(ret);
goto out;
}
/* Mark s_inode's extent as refcounted. */
if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) {
ret = ocfs2_add_refcount_flag(s_inode, &s_et,
&ref_tree->rf_ci,
ref_root_bh, spos,
p_cluster, num_clusters,
dealloc, NULL);
if (ret) {
mlog_errno(ret);
goto out_unlock_refcount;
}
}
/* Map in the new extent. */
ext_flags |= OCFS2_EXT_REFCOUNTED;
ret = ocfs2_add_refcounted_extent(t_inode, &t_et,
&ref_tree->rf_ci,
ref_root_bh,
tpos, p_cluster,
num_clusters,
ext_flags,
dealloc);
if (ret) {
mlog_errno(ret);
goto out_unlock_refcount;
}
ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
brelse(ref_root_bh);
next_loop:
spos += num_clusters;
tpos += num_clusters;
}
out:
return ret;
out_unlock_refcount:
ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
brelse(ref_root_bh);
return ret;
}
/* Set up refcount tree and remap s_inode to t_inode. */
static int ocfs2_reflink_remap_blocks(struct inode *s_inode,
struct buffer_head *s_bh,
loff_t pos_in,
struct inode *t_inode,
struct buffer_head *t_bh,
loff_t pos_out,
loff_t len)
{
struct ocfs2_cached_dealloc_ctxt dealloc;
struct ocfs2_super *osb;
struct ocfs2_dinode *dis;
struct ocfs2_dinode *dit;
int ret;
osb = OCFS2_SB(s_inode->i_sb);
dis = (struct ocfs2_dinode *)s_bh->b_data;
dit = (struct ocfs2_dinode *)t_bh->b_data;
ocfs2_init_dealloc_ctxt(&dealloc);
/*
* If we're reflinking the entire file and the source is inline
* data, just copy the contents.
*/
if (pos_in == pos_out && pos_in == 0 && len == i_size_read(s_inode) &&
i_size_read(t_inode) <= len &&
(OCFS2_I(s_inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)) {
ret = ocfs2_duplicate_inline_data(s_inode, s_bh, t_inode, t_bh);
if (ret)
mlog_errno(ret);
goto out;
}
/*
* If both inodes belong to two different refcount groups then
* forget it because we don't know how (or want) to go merging
* refcount trees.
*/
ret = -EOPNOTSUPP;
if (ocfs2_is_refcount_inode(s_inode) &&
ocfs2_is_refcount_inode(t_inode) &&
le64_to_cpu(dis->i_refcount_loc) !=
le64_to_cpu(dit->i_refcount_loc))
goto out;
/* Neither inode has a refcount tree. Add one to s_inode. */
if (!ocfs2_is_refcount_inode(s_inode) &&
!ocfs2_is_refcount_inode(t_inode)) {
ret = ocfs2_create_refcount_tree(s_inode, s_bh);
if (ret) {
mlog_errno(ret);
goto out;
}
}
/* Ensure that both inodes end up with the same refcount tree. */
if (!ocfs2_is_refcount_inode(s_inode)) {
ret = ocfs2_set_refcount_tree(s_inode, s_bh,
le64_to_cpu(dit->i_refcount_loc));
if (ret) {
mlog_errno(ret);
goto out;
}
}
if (!ocfs2_is_refcount_inode(t_inode)) {
ret = ocfs2_set_refcount_tree(t_inode, t_bh,
le64_to_cpu(dis->i_refcount_loc));
if (ret) {
mlog_errno(ret);
goto out;
}
}
/* Turn off inline data in the dest file. */
if (OCFS2_I(t_inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
ret = ocfs2_convert_inline_data_to_extents(t_inode, t_bh);
if (ret) {
mlog_errno(ret);
goto out;
}
}
/* Actually remap extents now. */
ret = ocfs2_reflink_remap_extent(s_inode, s_bh, pos_in, t_inode, t_bh,
pos_out, len, &dealloc);
if (ret) {
mlog_errno(ret);
goto out;
}
out:
if (ocfs2_dealloc_has_cluster(&dealloc)) {
ocfs2_schedule_truncate_log_flush(osb, 1);
ocfs2_run_deallocs(osb, &dealloc);
}
return ret;
}
/* Lock an inode and grab a bh pointing to the inode. */
static int ocfs2_reflink_inodes_lock(struct inode *s_inode,
struct buffer_head **bh1,
struct inode *t_inode,
struct buffer_head **bh2)
{
struct inode *inode1;
struct inode *inode2;
struct ocfs2_inode_info *oi1;
struct ocfs2_inode_info *oi2;
bool same_inode = (s_inode == t_inode);
int status;
/* First grab the VFS and rw locks. */
lock_two_nondirectories(s_inode, t_inode);
inode1 = s_inode;
inode2 = t_inode;
if (inode1->i_ino > inode2->i_ino)
swap(inode1, inode2);
status = ocfs2_rw_lock(inode1, 1);
if (status) {
mlog_errno(status);
goto out_i1;
}
if (!same_inode) {
status = ocfs2_rw_lock(inode2, 1);
if (status) {
mlog_errno(status);
goto out_i2;
}
}
/* Now go for the cluster locks */
oi1 = OCFS2_I(inode1);
oi2 = OCFS2_I(inode2);
trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
(unsigned long long)oi2->ip_blkno);
if (*bh1)
*bh1 = NULL;
if (*bh2)
*bh2 = NULL;
/* We always want to lock the one with the lower lockid first. */
if (oi1->ip_blkno > oi2->ip_blkno)
mlog_errno(-ENOLCK);
/* lock id1 */
status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_REFLINK_TARGET);
if (status < 0) {
if (status != -ENOENT)
mlog_errno(status);
goto out_rw2;
}
/* lock id2 */
if (!same_inode) {
status = ocfs2_inode_lock_nested(inode2, bh2, 1,
OI_LS_REFLINK_TARGET);
if (status < 0) {
if (status != -ENOENT)
mlog_errno(status);
goto out_cl1;
}
} else
*bh2 = *bh1;
trace_ocfs2_double_lock_end(
(unsigned long long)OCFS2_I(inode1)->ip_blkno,
(unsigned long long)OCFS2_I(inode2)->ip_blkno);
return 0;
out_cl1:
ocfs2_inode_unlock(inode1, 1);
brelse(*bh1);
*bh1 = NULL;
out_rw2:
ocfs2_rw_unlock(inode2, 1);
out_i2:
ocfs2_rw_unlock(inode1, 1);
out_i1:
unlock_two_nondirectories(s_inode, t_inode);
return status;
}
/* Unlock both inodes and release buffers. */
static void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
struct buffer_head *s_bh,
struct inode *t_inode,
struct buffer_head *t_bh)
{
ocfs2_inode_unlock(s_inode, 1);
ocfs2_rw_unlock(s_inode, 1);
brelse(s_bh);
if (s_inode != t_inode) {
ocfs2_inode_unlock(t_inode, 1);
ocfs2_rw_unlock(t_inode, 1);
brelse(t_bh);
}
unlock_two_nondirectories(s_inode, t_inode);
}
/* Link a range of blocks from one file to another. */
int ocfs2_reflink_remap_range(struct file *file_in,
loff_t pos_in,
struct file *file_out,
loff_t pos_out,
u64 len,
bool is_dedupe)
{
struct inode *inode_in = file_inode(file_in);
struct inode *inode_out = file_inode(file_out);
struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
struct buffer_head *in_bh = NULL, *out_bh = NULL;
bool same_inode = (inode_in == inode_out);
ssize_t ret;
if (!ocfs2_refcount_tree(osb))
return -EOPNOTSUPP;
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
return -EROFS;
/* Lock both files against IO */
ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh);
if (ret)
return ret;
/* Check file eligibility and prepare for block sharing. */
ret = -EINVAL;
if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) ||
(OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE))
goto out_unlock;
ret = vfs_clone_file_prep_inodes(inode_in, pos_in, inode_out, pos_out,
&len, is_dedupe);
if (ret || len == 0)
goto out_unlock;
/* Lock out changes to the allocation maps and remap. */
down_write(&OCFS2_I(inode_in)->ip_alloc_sem);
if (!same_inode)
down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem,
SINGLE_DEPTH_NESTING);
ret = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in, inode_out,
out_bh, pos_out, len);
/* Zap any page cache for the destination file's range. */
if (!ret)
truncate_inode_pages_range(&inode_out->i_data, pos_out,
PAGE_ALIGN(pos_out + len) - 1);
up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
if (!same_inode)
up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
if (ret) {
mlog_errno(ret);
goto out_unlock;
}
/*
* Empty the extent map so that we may get the right extent
* record from the disk.
*/
ocfs2_extent_map_trunc(inode_in, 0);
ocfs2_extent_map_trunc(inode_out, 0);
ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len);
if (ret) {
mlog_errno(ret);
goto out_unlock;
}
ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
return 0;
out_unlock:
ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
return ret;
}

7
fs/ocfs2/refcounttree.h
View File

@ -115,4 +115,11 @@ int ocfs2_reflink_ioctl(struct inode *inode,
const char __user *oldname,
const char __user *newname,
bool preserve);
int ocfs2_reflink_remap_range(struct file *file_in,
loff_t pos_in,
struct file *file_out,
loff_t pos_out,
u64 len,
bool is_dedupe);
#endif /* OCFS2_REFCOUNTTREE_H */

4
fs/ocfs2/xattr.c
View File

@ -2577,7 +2577,7 @@ int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
return 0;
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) {
if (ocfs2_is_refcount_inode(inode)) {
ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb),
le64_to_cpu(di->i_refcount_loc),
1, &ref_tree, &ref_root_bh);
@ -3608,7 +3608,7 @@ int ocfs2_xattr_set(struct inode *inode,
}
/* Check whether the value is refcounted and do some preparation. */
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL &&
if (ocfs2_is_refcount_inode(inode) &&
(!xis.not_found || !xbs.not_found)) {
ret = ocfs2_prepare_refcount_xattr(inode, di, &xi,
&xis, &xbs, &ref_tree,

2
fs/quota/dquot.c
View File

@ -2401,7 +2401,7 @@ int dquot_resume(struct super_block *sb, int type)
EXPORT_SYMBOL(dquot_resume);
int dquot_quota_on(struct super_block *sb, int type, int format_id,
struct path *path)
const struct path *path)
{
int error = security_quota_on(path->dentry);
if (error)

4
fs/quota/quota.c
View File

@ -80,7 +80,7 @@ unsigned int qtype_enforce_flag(int type)
}
static int quota_quotaon(struct super_block *sb, int type, qid_t id,
struct path *path)
const struct path *path)
{
if (!sb->s_qcop->quota_on && !sb->s_qcop->quota_enable)
return -ENOSYS;
@ -700,7 +700,7 @@ static int quota_rmxquota(struct super_block *sb, void __user *addr)
/* Copy parameters and call proper function */
static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
void __user *addr, struct path *path)
void __user *addr, const struct path *path)
{
int ret;

227
fs/read_write.c
View File

@ -1540,20 +1540,37 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
sb_start_write(inode_out->i_sb);
ret = -EOPNOTSUPP;
if (file_out->f_op->copy_file_range)
/*
* Try cloning first, this is supported by more file systems, and
* more efficient if both clone and copy are supported (e.g. NFS).
*/
if (file_in->f_op->clone_file_range) {
ret = file_in->f_op->clone_file_range(file_in, pos_in,
file_out, pos_out, len);
if (ret == 0) {
ret = len;
goto done;
}
}
if (file_out->f_op->copy_file_range) {
ret = file_out->f_op->copy_file_range(file_in, pos_in, file_out,
pos_out, len, flags);
if (ret == -EOPNOTSUPP)
if (ret != -EOPNOTSUPP)
goto done;
}
ret = do_splice_direct(file_in, &pos_in, file_out, &pos_out,
len > MAX_RW_COUNT ? MAX_RW_COUNT : len, 0);
done:
if (ret > 0) {
fsnotify_access(file_in);
add_rchar(current, ret);
fsnotify_modify(file_out);
add_wchar(current, ret);
}
inc_syscr(current);
inc_syscw(current);
@ -1648,6 +1665,114 @@ static int clone_verify_area(struct file *file, loff_t pos, u64 len, bool write)
return security_file_permission(file, write ? MAY_WRITE : MAY_READ);
}
/*
* Check that the two inodes are eligible for cloning, the ranges make
* sense, and then flush all dirty data. Caller must ensure that the
* inodes have been locked against any other modifications.
*/
int vfs_clone_file_prep_inodes(struct inode *inode_in, loff_t pos_in,
struct inode *inode_out, loff_t pos_out,
u64 *len, bool is_dedupe)
{
loff_t bs = inode_out->i_sb->s_blocksize;
loff_t blen;
loff_t isize;
bool same_inode = (inode_in == inode_out);
int ret;
/* Don't touch certain kinds of inodes */
if (IS_IMMUTABLE(inode_out))
return -EPERM;
if (IS_SWAPFILE(inode_in) || IS_SWAPFILE(inode_out))
return -ETXTBSY;
/* Don't reflink dirs, pipes, sockets... */
if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode))
return -EISDIR;
if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode))
return -EINVAL;
/* Are we going all the way to the end? */
isize = i_size_read(inode_in);
if (isize == 0) {
*len = 0;
return 0;
}
/* Zero length dedupe exits immediately; reflink goes to EOF. */
if (*len == 0) {
if (is_dedupe) {
*len = 0;
return 0;
}
*len = isize - pos_in;
}
/* Ensure offsets don't wrap and the input is inside i_size */
if (pos_in + *len < pos_in || pos_out + *len < pos_out ||
pos_in + *len > isize)
return -EINVAL;
/* Don't allow dedupe past EOF in the dest file */
if (is_dedupe) {
loff_t disize;
disize = i_size_read(inode_out);
if (pos_out >= disize || pos_out + *len > disize)
return -EINVAL;
}
/* If we're linking to EOF, continue to the block boundary. */
if (pos_in + *len == isize)
blen = ALIGN(isize, bs) - pos_in;
else
blen = *len;
/* Only reflink if we're aligned to block boundaries */
if (!IS_ALIGNED(pos_in, bs) || !IS_ALIGNED(pos_in + blen, bs) ||
!IS_ALIGNED(pos_out, bs) || !IS_ALIGNED(pos_out + blen, bs))
return -EINVAL;
/* Don't allow overlapped reflink within the same file */
if (same_inode) {
if (pos_out + blen > pos_in && pos_out < pos_in + blen)
return -EINVAL;
}
/* Wait for the completion of any pending IOs on both files */
inode_dio_wait(inode_in);
if (!same_inode)
inode_dio_wait(inode_out);
ret = filemap_write_and_wait_range(inode_in->i_mapping,
pos_in, pos_in + *len - 1);
if (ret)
return ret;
ret = filemap_write_and_wait_range(inode_out->i_mapping,
pos_out, pos_out + *len - 1);
if (ret)
return ret;
/*
* Check that the extents are the same.
*/
if (is_dedupe) {
bool is_same = false;
ret = vfs_dedupe_file_range_compare(inode_in, pos_in,
inode_out, pos_out, *len, &is_same);
if (ret)
return ret;
if (!is_same)
return -EBADE;
}
return 0;
}
EXPORT_SYMBOL(vfs_clone_file_prep_inodes);
int vfs_clone_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out, u64 len)
{
@ -1698,6 +1823,102 @@ int vfs_clone_file_range(struct file *file_in, loff_t pos_in,
}
EXPORT_SYMBOL(vfs_clone_file_range);
/*
* Read a page's worth of file data into the page cache. Return the page
* locked.
*/
static struct page *vfs_dedupe_get_page(struct inode *inode, loff_t offset)
{
struct address_space *mapping;
struct page *page;
pgoff_t n;
n = offset >> PAGE_SHIFT;
mapping = inode->i_mapping;
page = read_mapping_page(mapping, n, NULL);
if (IS_ERR(page))
return page;
if (!PageUptodate(page)) {
put_page(page);
return ERR_PTR(-EIO);
}
lock_page(page);
return page;
}
/*
* Compare extents of two files to see if they are the same.
* Caller must have locked both inodes to prevent write races.
*/
int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
struct inode *dest, loff_t destoff,
loff_t len, bool *is_same)
{
loff_t src_poff;
loff_t dest_poff;
void *src_addr;
void *dest_addr;
struct page *src_page;
struct page *dest_page;
loff_t cmp_len;
bool same;
int error;
error = -EINVAL;
same = true;
while (len) {
src_poff = srcoff & (PAGE_SIZE - 1);
dest_poff = destoff & (PAGE_SIZE - 1);
cmp_len = min(PAGE_SIZE - src_poff,
PAGE_SIZE - dest_poff);
cmp_len = min(cmp_len, len);
if (cmp_len <= 0)
goto out_error;
src_page = vfs_dedupe_get_page(src, srcoff);
if (IS_ERR(src_page)) {
error = PTR_ERR(src_page);
goto out_error;
}
dest_page = vfs_dedupe_get_page(dest, destoff);
if (IS_ERR(dest_page)) {
error = PTR_ERR(dest_page);
unlock_page(src_page);
put_page(src_page);
goto out_error;
}
src_addr = kmap_atomic(src_page);
dest_addr = kmap_atomic(dest_page);
flush_dcache_page(src_page);
flush_dcache_page(dest_page);
if (memcmp(src_addr + src_poff, dest_addr + dest_poff, cmp_len))
same = false;
kunmap_atomic(dest_addr);
kunmap_atomic(src_addr);
unlock_page(dest_page);
unlock_page(src_page);
put_page(dest_page);
put_page(src_page);
if (!same)
break;
srcoff += cmp_len;
destoff += cmp_len;
len -= cmp_len;
}
*is_same = same;
return 0;
out_error:
return error;
}
EXPORT_SYMBOL(vfs_dedupe_file_range_compare);
int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same)
{
struct file_dedupe_range_info *info;

4
fs/reiserfs/super.c
View File

@ -802,7 +802,7 @@ static int reiserfs_acquire_dquot(struct dquot *);
static int reiserfs_release_dquot(struct dquot *);
static int reiserfs_mark_dquot_dirty(struct dquot *);
static int reiserfs_write_info(struct super_block *, int);
static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
static int reiserfs_quota_on(struct super_block *, int, int, const struct path *);
static const struct dquot_operations reiserfs_quota_operations = {
.write_dquot = reiserfs_write_dquot,
@ -2348,7 +2348,7 @@ static int reiserfs_quota_on_mount(struct super_block *sb, int type)
* Standard function to be called on quota_on
*/
static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
struct path *path)
const struct path *path)
{
int err;
struct inode *inode;

2
fs/statfs.c
View File

@ -63,7 +63,7 @@ static int statfs_by_dentry(struct dentry *dentry, struct kstatfs *buf)
return retval;
}
int vfs_statfs(struct path *path, struct kstatfs *buf)
int vfs_statfs(const struct path *path, struct kstatfs *buf)
{
int error;

2
fs/utimes.c
View File

@ -48,7 +48,7 @@ static bool nsec_valid(long nsec)
return nsec >= 0 && nsec <= 999999999;
}
static int utimes_common(struct path *path, struct timespec *times)
static int utimes_common(const struct path *path, struct timespec *times)
{
int error;
struct iattr newattrs;

19
fs/xfs/xfs_file.c
View File

@ -848,24 +848,6 @@ out_unlock:
return error;
}
STATIC ssize_t
xfs_file_copy_range(
struct file *file_in,
loff_t pos_in,
struct file *file_out,
loff_t pos_out,
size_t len,
unsigned int flags)
{
int error;
error = xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out,
len, false);
if (error)
return error;
return len;
}
STATIC int
xfs_file_clone_range(
struct file *file_in,
@ -1549,7 +1531,6 @@ const struct file_operations xfs_file_operations = {
.fsync = xfs_file_fsync,
.get_unmapped_area = thp_get_unmapped_area,
.fallocate = xfs_file_fallocate,
.copy_file_range = xfs_file_copy_range,
.clone_file_range = xfs_file_clone_range,
.dedupe_file_range = xfs_file_dedupe_range,
};

219
fs/xfs/xfs_reflink.c
View File

@ -1113,111 +1113,6 @@ err:
return error;
}
/*
* Read a page's worth of file data into the page cache. Return the page
* locked.
*/
static struct page *
xfs_get_page(
struct inode *inode,
xfs_off_t offset)
{
struct address_space *mapping;
struct page *page;
pgoff_t n;
n = offset >> PAGE_SHIFT;
mapping = inode->i_mapping;
page = read_mapping_page(mapping, n, NULL);
if (IS_ERR(page))
return page;
if (!PageUptodate(page)) {
put_page(page);
return ERR_PTR(-EIO);
}
lock_page(page);
return page;
}
/*
* Compare extents of two files to see if they are the same.
*/
static int
xfs_compare_extents(
struct inode *src,
xfs_off_t srcoff,
struct inode *dest,
xfs_off_t destoff,
xfs_off_t len,
bool *is_same)
{
xfs_off_t src_poff;
xfs_off_t dest_poff;
void *src_addr;
void *dest_addr;
struct page *src_page;
struct page *dest_page;
xfs_off_t cmp_len;
bool same;
int error;
error = -EINVAL;
same = true;
while (len) {
src_poff = srcoff & (PAGE_SIZE - 1);
dest_poff = destoff & (PAGE_SIZE - 1);
cmp_len = min(PAGE_SIZE - src_poff,
PAGE_SIZE - dest_poff);
cmp_len = min(cmp_len, len);
ASSERT(cmp_len > 0);
trace_xfs_reflink_compare_extents(XFS_I(src), srcoff, cmp_len,
XFS_I(dest), destoff);
src_page = xfs_get_page(src, srcoff);
if (IS_ERR(src_page)) {
error = PTR_ERR(src_page);
goto out_error;
}
dest_page = xfs_get_page(dest, destoff);
if (IS_ERR(dest_page)) {
error = PTR_ERR(dest_page);
unlock_page(src_page);
put_page(src_page);
goto out_error;
}
src_addr = kmap_atomic(src_page);
dest_addr = kmap_atomic(dest_page);
flush_dcache_page(src_page);
flush_dcache_page(dest_page);
if (memcmp(src_addr + src_poff, dest_addr + dest_poff, cmp_len))
same = false;
kunmap_atomic(dest_addr);
kunmap_atomic(src_addr);
unlock_page(dest_page);
unlock_page(src_page);
put_page(dest_page);
put_page(src_page);
if (!same)
break;
srcoff += cmp_len;
destoff += cmp_len;
len -= cmp_len;
}
*is_same = same;
return 0;
out_error:
trace_xfs_reflink_compare_extents_error(XFS_I(dest), error, _RET_IP_);
return error;
}
/*
* Link a range of blocks from one file to another.
*/
@ -1235,14 +1130,11 @@ xfs_reflink_remap_range(
struct inode *inode_out = file_inode(file_out);
struct xfs_inode *dest = XFS_I(inode_out);
struct xfs_mount *mp = src->i_mount;
loff_t bs = inode_out->i_sb->s_blocksize;
bool same_inode = (inode_in == inode_out);
xfs_fileoff_t sfsbno, dfsbno;
xfs_filblks_t fsblen;
xfs_extlen_t cowextsize;
loff_t isize;
ssize_t ret;
loff_t blen;
if (!xfs_sb_version_hasreflink(&mp->m_sb))
return -EOPNOTSUPP;
@ -1257,26 +1149,8 @@ xfs_reflink_remap_range(
else
xfs_lock_two_inodes(src, dest, XFS_MMAPLOCK_EXCL);
/* Don't touch certain kinds of inodes */
ret = -EPERM;
if (IS_IMMUTABLE(inode_out))
goto out_unlock;
ret = -ETXTBSY;
if (IS_SWAPFILE(inode_in) || IS_SWAPFILE(inode_out))
goto out_unlock;
/* Don't reflink dirs, pipes, sockets... */
ret = -EISDIR;
if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode))
goto out_unlock;
/* Check file eligibility and prepare for block sharing. */
ret = -EINVAL;
if (S_ISFIFO(inode_in->i_mode) || S_ISFIFO(inode_out->i_mode))
goto out_unlock;
if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode))
goto out_unlock;
/* Don't reflink realtime inodes */
if (XFS_IS_REALTIME_INODE(src) || XFS_IS_REALTIME_INODE(dest))
goto out_unlock;
@ -1285,97 +1159,18 @@ xfs_reflink_remap_range(
if (IS_DAX(inode_in) || IS_DAX(inode_out))
goto out_unlock;
/* Are we going all the way to the end? */
isize = i_size_read(inode_in);
if (isize == 0) {
ret = 0;
goto out_unlock;
}
/* Zero length dedupe exits immediately; reflink goes to EOF. */
if (len == 0) {
if (is_dedupe) {
ret = 0;
goto out_unlock;
}
len = isize - pos_in;
}
/* Ensure offsets don't wrap and the input is inside i_size */
if (pos_in + len < pos_in || pos_out + len < pos_out ||
pos_in + len > isize)
goto out_unlock;
/* Don't allow dedupe past EOF in the dest file */
if (is_dedupe) {
loff_t disize;
disize = i_size_read(inode_out);
if (pos_out >= disize || pos_out + len > disize)
goto out_unlock;
}
/* If we're linking to EOF, continue to the block boundary. */
if (pos_in + len == isize)
blen = ALIGN(isize, bs) - pos_in;
else
blen = len;
/* Only reflink if we're aligned to block boundaries */
if (!IS_ALIGNED(pos_in, bs) || !IS_ALIGNED(pos_in + blen, bs) ||
!IS_ALIGNED(pos_out, bs) || !IS_ALIGNED(pos_out + blen, bs))
goto out_unlock;
/* Don't allow overlapped reflink within the same file */
if (same_inode) {
if (pos_out + blen > pos_in && pos_out < pos_in + blen)
goto out_unlock;
}
/* Wait for the completion of any pending IOs on both files */
inode_dio_wait(inode_in);
if (!same_inode)
inode_dio_wait(inode_out);
ret = filemap_write_and_wait_range(inode_in->i_mapping,
pos_in, pos_in + len - 1);
if (ret)
goto out_unlock;
ret = filemap_write_and_wait_range(inode_out->i_mapping,
pos_out, pos_out + len - 1);
if (ret)
ret = vfs_clone_file_prep_inodes(inode_in, pos_in, inode_out, pos_out,
&len, is_dedupe);
if (ret || len == 0)
goto out_unlock;
trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out);
/*
* Check that the extents are the same.
*/
if (is_dedupe) {
bool is_same = false;
ret = xfs_compare_extents(inode_in, pos_in, inode_out, pos_out,
len, &is_same);
if (ret)
goto out_unlock;
if (!is_same) {
ret = -EBADE;
goto out_unlock;
}
}
/* Set flags and remap blocks. */
ret = xfs_reflink_set_inode_flag(src, dest);
if (ret)
goto out_unlock;
/*
* Invalidate the page cache so that we can clear any CoW mappings
* in the destination file.
*/
truncate_inode_pages_range(&inode_out->i_data, pos_out,
PAGE_ALIGN(pos_out + len) - 1);
dfsbno = XFS_B_TO_FSBT(mp, pos_out);
sfsbno = XFS_B_TO_FSBT(mp, pos_in);
fsblen = XFS_B_TO_FSB(mp, len);
@ -1384,6 +1179,10 @@ xfs_reflink_remap_range(
if (ret)
goto out_unlock;
/* Zap any page cache for the destination file's range. */
truncate_inode_pages_range(&inode_out->i_data, pos_out,
PAGE_ALIGN(pos_out + len) - 1);
/*
* Carry the cowextsize hint from src to dest if we're sharing the
* entire source file to the entire destination file, the source file

2
include/linux/audit.h
View File

@ -147,7 +147,7 @@ extern void audit_log_d_path(struct audit_buffer *ab,
extern void audit_log_key(struct audit_buffer *ab,
char *key);
extern void audit_log_link_denied(const char *operation,
struct path *link);
const struct path *link);
extern void audit_log_lost(const char *message);
#ifdef CONFIG_SECURITY
extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);

4
include/linux/dcache.h
View File

@ -139,7 +139,7 @@ struct dentry_operations {
void (*d_iput)(struct dentry *, struct inode *);
char *(*d_dname)(struct dentry *, char *, int);
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(struct dentry *, bool);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
unsigned int);
} ____cacheline_aligned;
@ -254,7 +254,7 @@ extern struct dentry *d_find_alias(struct inode *);
extern void d_prune_aliases(struct inode *);
/* test whether we have any submounts in a subdir tree */
extern int have_submounts(struct dentry *);
extern int path_has_submounts(const struct path *);
/*
* This adds the entry to the hash queues.

4
include/linux/dcookies.h
View File

@ -44,7 +44,7 @@ void dcookie_unregister(struct dcookie_user * user);
*
* Returns 0 on success, with *cookie filled in
*/
int get_dcookie(struct path *path, unsigned long *cookie);
int get_dcookie(const struct path *path, unsigned long *cookie);
#else
@ -58,7 +58,7 @@ static inline void dcookie_unregister(struct dcookie_user * user)
return;
}
static inline int get_dcookie(struct path *path, unsigned long *cookie)
static inline int get_dcookie(const struct path *path, unsigned long *cookie)
{
return -ENOSYS;
}

2
include/linux/file.h
View File

@ -17,7 +17,7 @@ struct file_operations;
struct vfsmount;
struct dentry;
struct path;
extern struct file *alloc_file(struct path *, fmode_t mode,
extern struct file *alloc_file(const struct path *, fmode_t mode,
const struct file_operations *fop);
static inline void fput_light(struct file *file, int fput_needed)

12
include/linux/fs.h
View File

@ -1726,8 +1726,14 @@ extern ssize_t vfs_writev(struct file *, const struct iovec __user *,
unsigned long, loff_t *, int);
extern ssize_t vfs_copy_file_range(struct file *, loff_t , struct file *,
loff_t, size_t, unsigned int);
extern int vfs_clone_file_prep_inodes(struct inode *inode_in, loff_t pos_in,
struct inode *inode_out, loff_t pos_out,
u64 *len, bool is_dedupe);
extern int vfs_clone_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out, u64 len);
extern int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
struct inode *dest, loff_t destoff,
loff_t len, bool *is_same);
extern int vfs_dedupe_file_range(struct file *file,
struct file_dedupe_range *same);
@ -2084,11 +2090,11 @@ extern int may_umount_tree(struct vfsmount *);
extern int may_umount(struct vfsmount *);
extern long do_mount(const char *, const char __user *,
const char *, unsigned long, void *);
extern struct vfsmount *collect_mounts(struct path *);
extern struct vfsmount *collect_mounts(const struct path *);
extern void drop_collected_mounts(struct vfsmount *);
extern int iterate_mounts(int (*)(struct vfsmount *, void *), void *,
struct vfsmount *);
extern int vfs_statfs(struct path *, struct kstatfs *);
extern int vfs_statfs(const struct path *, struct kstatfs *);
extern int user_statfs(const char __user *, struct kstatfs *);
extern int fd_statfs(int, struct kstatfs *);
extern int vfs_ustat(dev_t, struct kstatfs *);
@ -2657,7 +2663,7 @@ extern struct file * open_exec(const char *);
/* fs/dcache.c -- generic fs support functions */
extern bool is_subdir(struct dentry *, struct dentry *);
extern bool path_is_under(struct path *, struct path *);
extern bool path_is_under(const struct path *, const struct path *);
extern char *file_path(struct file *, char *, int);

12
include/linux/fsnotify.h
View File

@ -17,7 +17,7 @@
#include <linux/bug.h>
/* Notify this dentry's parent about a child's events. */
static inline int fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
static inline int fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask)
{
if (!dentry)
dentry = path->dentry;
@ -28,7 +28,7 @@ static inline int fsnotify_parent(struct path *path, struct dentry *dentry, __u3
/* simple call site for access decisions */
static inline int fsnotify_perm(struct file *file, int mask)
{
struct path *path = &file->f_path;
const struct path *path = &file->f_path;
/*
* Do not use file_inode() here or anywhere in this file to get the
* inode. That would break *notity on overlayfs.
@ -176,7 +176,7 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
*/
static inline void fsnotify_access(struct file *file)
{
struct path *path = &file->f_path;
const struct path *path = &file->f_path;
struct inode *inode = path->dentry->d_inode;
__u32 mask = FS_ACCESS;
@ -194,7 +194,7 @@ static inline void fsnotify_access(struct file *file)
*/
static inline void fsnotify_modify(struct file *file)
{
struct path *path = &file->f_path;
const struct path *path = &file->f_path;
struct inode *inode = path->dentry->d_inode;
__u32 mask = FS_MODIFY;
@ -212,7 +212,7 @@ static inline void fsnotify_modify(struct file *file)
*/
static inline void fsnotify_open(struct file *file)
{
struct path *path = &file->f_path;
const struct path *path = &file->f_path;
struct inode *inode = path->dentry->d_inode;
__u32 mask = FS_OPEN;
@ -228,7 +228,7 @@ static inline void fsnotify_open(struct file *file)
*/
static inline void fsnotify_close(struct file *file)
{
struct path *path = &file->f_path;
const struct path *path = &file->f_path;
struct inode *inode = path->dentry->d_inode;
fmode_t mode = file->f_mode;
__u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE;

10
include/linux/fsnotify_backend.h
View File

@ -96,7 +96,7 @@ struct fsnotify_ops {
struct inode *inode,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
u32 mask, void *data, int data_type,
u32 mask, const void *data, int data_type,
const unsigned char *file_name, u32 cookie);
void (*free_group_priv)(struct fsnotify_group *group);
void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
@ -245,9 +245,9 @@ struct fsnotify_mark {
/* called from the vfs helpers */
/* main fsnotify call to send events */
extern int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
extern int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
const unsigned char *name, u32 cookie);
extern int __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask);
extern int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask);
extern void __fsnotify_inode_delete(struct inode *inode);
extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt);
extern u32 fsnotify_get_cookie(void);
@ -357,13 +357,13 @@ extern void fsnotify_init_event(struct fsnotify_event *event,
#else
static inline int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
static inline int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
const unsigned char *name, u32 cookie)
{
return 0;
}
static inline int __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
static inline int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask)
{
return 0;
}

6
include/linux/mount.h
View File

@ -79,12 +79,12 @@ extern void mnt_drop_write(struct vfsmount *mnt);
extern void mnt_drop_write_file(struct file *file);
extern void mntput(struct vfsmount *mnt);
extern struct vfsmount *mntget(struct vfsmount *mnt);
extern struct vfsmount *mnt_clone_internal(struct path *path);
extern struct vfsmount *mnt_clone_internal(const struct path *path);
extern int __mnt_is_readonly(struct vfsmount *mnt);
extern bool mnt_may_suid(struct vfsmount *mnt);
struct path;
extern struct vfsmount *clone_private_mount(struct path *path);
extern struct vfsmount *clone_private_mount(const struct path *path);
struct file_system_type;
extern struct vfsmount *vfs_kern_mount(struct file_system_type *type,
@ -98,4 +98,6 @@ extern dev_t name_to_dev_t(const char *name);
extern unsigned int sysctl_mount_max;
extern bool path_is_mountpoint(const struct path *path);
#endif /* _LINUX_MOUNT_H */

2
include/linux/quota.h
View File

@ -431,7 +431,7 @@ struct qc_info {
/* Operations handling requests from userspace */
struct quotactl_ops {
int (*quota_on)(struct super_block *, int, int, struct path *);
int (*quota_on)(struct super_block *, int, int, const struct path *);
int (*quota_off)(struct super_block *, int);
int (*quota_enable)(struct super_block *, unsigned int);
int (*quota_disable)(struct super_block *, unsigned int);

2
include/linux/quotaops.h
View File

@ -90,7 +90,7 @@ int dquot_file_open(struct inode *inode, struct file *file);
int dquot_enable(struct inode *inode, int type, int format_id,
unsigned int flags);
int dquot_quota_on(struct super_block *sb, int type, int format_id,
struct path *path);
const struct path *path);
int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
int format_id, int type);
int dquot_quota_off(struct super_block *sb, int type);

4
kernel/audit.c
View File

@ -1893,7 +1893,7 @@ void audit_copy_inode(struct audit_names *name, const struct dentry *dentry,
* @call_panic: optional pointer to int that will be updated if secid fails
*/
void audit_log_name(struct audit_context *context, struct audit_names *n,
struct path *path, int record_num, int *call_panic)
const struct path *path, int record_num, int *call_panic)
{
struct audit_buffer *ab;
ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH);
@ -2081,7 +2081,7 @@ EXPORT_SYMBOL(audit_log_task_info);
* @operation: specific link operation
* @link: the path that triggered the restriction
*/
void audit_log_link_denied(const char *operation, struct path *link)
void audit_log_link_denied(const char *operation, const struct path *link)
{
struct audit_buffer *ab;
struct audit_names *name;

2
kernel/audit.h
View File

@ -212,7 +212,7 @@ extern void audit_copy_inode(struct audit_names *name,
extern void audit_log_cap(struct audit_buffer *ab, char *prefix,
kernel_cap_t *cap);
extern void audit_log_name(struct audit_context *context,
struct audit_names *n, struct path *path,
struct audit_names *n, const struct path *path,
int record_num, int *call_panic);
extern int audit_pid;

10
kernel/audit_fsnotify.c
View File

@ -74,7 +74,7 @@ int audit_mark_compare(struct audit_fsnotify_mark *mark, unsigned long ino, dev_
}
static void audit_update_mark(struct audit_fsnotify_mark *audit_mark,
struct inode *inode)
const struct inode *inode)
{
audit_mark->dev = inode ? inode->i_sb->s_dev : AUDIT_DEV_UNSET;
audit_mark->ino = inode ? inode->i_ino : AUDIT_INO_UNSET;
@ -167,11 +167,11 @@ static int audit_mark_handle_event(struct fsnotify_group *group,
struct inode *to_tell,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
u32 mask, void *data, int data_type,
u32 mask, const void *data, int data_type,
const unsigned char *dname, u32 cookie)
{
struct audit_fsnotify_mark *audit_mark;
struct inode *inode = NULL;
const struct inode *inode = NULL;
audit_mark = container_of(inode_mark, struct audit_fsnotify_mark, mark);
@ -179,10 +179,10 @@ static int audit_mark_handle_event(struct fsnotify_group *group,
switch (data_type) {
case (FSNOTIFY_EVENT_PATH):
inode = ((struct path *)data)->dentry->d_inode;
inode = ((const struct path *)data)->dentry->d_inode;
break;
case (FSNOTIFY_EVENT_INODE):
inode = (struct inode *)data;
inode = (const struct inode *)data;
break;
default:
BUG();

2
kernel/audit_tree.c
View File

@ -947,7 +947,7 @@ static int audit_tree_handle_event(struct fsnotify_group *group,
struct inode *to_tell,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
u32 mask, void *data, int data_type,
u32 mask, const void *data, int data_type,
const unsigned char *file_name, u32 cookie)
{
return 0;

8
kernel/audit_watch.c
View File

@ -471,10 +471,10 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
struct inode *to_tell,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
u32 mask, void *data, int data_type,
u32 mask, const void *data, int data_type,
const unsigned char *dname, u32 cookie)
{
struct inode *inode;
const struct inode *inode;
struct audit_parent *parent;
parent = container_of(inode_mark, struct audit_parent, mark);
@ -483,10 +483,10 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
switch (data_type) {
case (FSNOTIFY_EVENT_PATH):
inode = d_backing_inode(((struct path *)data)->dentry);
inode = d_backing_inode(((const struct path *)data)->dentry);
break;
case (FSNOTIFY_EVENT_INODE):
inode = (struct inode *)data;
inode = (const struct inode *)data;
break;
default:
BUG();