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

Pull more vfs updates from Al Viro:
 "Assorted VFS fixes and related cleanups (IMO the most interesting in
  that part are f_path-related things and Eric's descriptor-related
  stuff).  UFS regression fixes (it got broken last cycle).  9P fixes.
  fs-cache series, DAX patches, Jan's file_remove_suid() work"

[ I'd say this is much more than "fixes and related cleanups".  The
  file_table locking rule change by Eric Dumazet is a rather big and
  fundamental update even if the patch isn't huge.   - Linus ]

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (49 commits)
  9p: cope with bogus responses from server in p9_client_{read,write}
  p9_client_write(): avoid double p9_free_req()
  9p: forgetting to cancel request on interrupted zero-copy RPC
  dax: bdev_direct_access() may sleep
  block: Add support for DAX reads/writes to block devices
  dax: Use copy_from_iter_nocache
  dax: Add block size note to documentation
  fs/file.c: __fget() and dup2() atomicity rules
  fs/file.c: don't acquire files->file_lock in fd_install()
  fs:super:get_anon_bdev: fix race condition could cause dev exceed its upper limitation
  vfs: avoid creation of inode number 0 in get_next_ino
  namei: make set_root_rcu() return void
  make simple_positive() public
  ufs: use dir_pages instead of ufs_dir_pages()
  pagemap.h: move dir_pages() over there
  remove the pointless include of lglock.h
  fs: cleanup slight list_entry abuse
  xfs: Correctly lock inode when removing suid and file capabilities
  fs: Call security_ops->inode_killpriv on truncate
  fs: Provide function telling whether file_remove_privs() will do anything
  ...
hifive-unleashed-5.1
Linus Torvalds 2015-07-04 19:36:06 -07:00
parent 9b284cbdb5 0f1db7dee2
commit 1dc51b8288
99 changed files with 803 additions and 572 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
Documentation/filesystems/caching/backend-api.txt
View File

@ -676,6 +676,29 @@ FS-Cache provides some utilities that a cache backend may make use of:
as possible.
(*) Indicate that a stale object was found and discarded:
void fscache_object_retrying_stale(struct fscache_object *object);
This is called to indicate that the lookup procedure found an object in
the cache that the netfs decided was stale. The object has been
discarded from the cache and the lookup will be performed again.
(*) Indicate that the caching backend killed an object:
void fscache_object_mark_killed(struct fscache_object *object,
enum fscache_why_object_killed why);
This is called to indicate that the cache backend preemptively killed an
object. The why parameter should be set to indicate the reason:
FSCACHE_OBJECT_IS_STALE - the object was stale and needs discarding.
FSCACHE_OBJECT_NO_SPACE - there was insufficient cache space
FSCACHE_OBJECT_WAS_RETIRED - the object was retired when relinquished.
FSCACHE_OBJECT_WAS_CULLED - the object was culled to make space.
(*) Get and release references on a retrieval record:
void fscache_get_retrieval(struct fscache_retrieval *op);

7
Documentation/filesystems/caching/fscache.txt
View File

@ -284,8 +284,9 @@ proc files.
enq=N Number of times async ops queued for processing
can=N Number of async ops cancelled
rej=N Number of async ops rejected due to object lookup/create failure
ini=N Number of async ops initialised
dfr=N Number of async ops queued for deferred release
rel=N Number of async ops released
rel=N Number of async ops released (should equal ini=N when idle)
gc=N Number of deferred-release async ops garbage collected
CacheOp alo=N Number of in-progress alloc_object() cache ops
luo=N Number of in-progress lookup_object() cache ops
@ -303,6 +304,10 @@ proc files.
wrp=N Number of in-progress write_page() cache ops
ucp=N Number of in-progress uncache_page() cache ops
dsp=N Number of in-progress dissociate_pages() cache ops
CacheEv nsp=N Number of object lookups/creations rejected due to lack of space
stl=N Number of stale objects deleted
rtr=N Number of objects retired when relinquished
cul=N Number of objects culled
(*) /proc/fs/fscache/histogram

6
Documentation/filesystems/dax.txt
View File

@ -18,8 +18,10 @@ Usage
-----
If you have a block device which supports DAX, you can make a filesystem
on it as usual. When mounting it, use the -o dax option manually
or add 'dax' to the options in /etc/fstab.
on it as usual. The DAX code currently only supports files with a block
size equal to your kernel's PAGE_SIZE, so you may need to specify a block
size when creating the filesystem. When mounting it, use the "-o dax"
option on the command line or add 'dax' to the options in /etc/fstab.
Implementation Tips for Block Driver Writers

4
Documentation/filesystems/porting
View File

@ -500,3 +500,7 @@ in your dentry operations instead.
dentry, it does not get nameidata at all and it gets called only when cookie
is non-NULL. Note that link body isn't available anymore, so if you need it,
store it as cookie.
--
[mandatory]
__fd_install() & fd_install() can now sleep. Callers should not
hold a spinlock or other resources that do not allow a schedule.

10
arch/arc/kernel/troubleshoot.c
View File

@ -71,15 +71,12 @@ static void print_task_path_n_nm(struct task_struct *tsk, char *buf)
mmput(mm);
if (exe_file) {
path = exe_file->f_path;
path_get(&exe_file->f_path);
path_nm = file_path(exe_file, buf, 255);
fput(exe_file);
path_nm = d_path(&path, buf, 255);
path_put(&path);
}
done:
pr_info("Path: %s\n", path_nm);
pr_info("Path: %s\n", !IS_ERR(path_nm) ? path_nm : "?");
}
static void show_faulting_vma(unsigned long address, char *buf)
@ -103,8 +100,7 @@ static void show_faulting_vma(unsigned long address, char *buf)
if (vma && (vma->vm_start <= address)) {
struct file *file = vma->vm_file;
if (file) {
struct path *path = &file->f_path;
nm = d_path(path, buf, PAGE_SIZE - 1);
nm = file_path(file, buf, PAGE_SIZE - 1);
inode = file_inode(vma->vm_file);
dev = inode->i_sb->s_dev;
ino = inode->i_ino;

2
arch/blackfin/kernel/trace.c
View File

@ -136,7 +136,7 @@ void decode_address(char *buf, unsigned long address)
struct file *file = vma->vm_file;
if (file) {
char *d_name = d_path(&file->f_path, _tmpbuf,
char *d_name = file_path(file, _tmpbuf,
sizeof(_tmpbuf));
if (!IS_ERR(d_name))
name = d_name;

2
arch/powerpc/platforms/cell/spufs/inode.c
View File

@ -166,7 +166,7 @@ static void spufs_prune_dir(struct dentry *dir)
mutex_lock(&d_inode(dir)->i_mutex);
list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) {
spin_lock(&dentry->d_lock);
if (!(d_unhashed(dentry)) && d_really_is_positive(dentry)) {
if (simple_positive(dentry)) {
dget_dlock(dentry);
__d_drop(dentry);
spin_unlock(&dentry->d_lock);

7
arch/s390/hypfs/inode.c
View File

@ -62,18 +62,13 @@ static void hypfs_add_dentry(struct dentry *dentry)
hypfs_last_dentry = dentry;
}
static inline int hypfs_positive(struct dentry *dentry)
{
return d_really_is_positive(dentry) && !d_unhashed(dentry);
}
static void hypfs_remove(struct dentry *dentry)
{
struct dentry *parent;
parent = dentry->d_parent;
mutex_lock(&d_inode(parent)->i_mutex);
if (hypfs_positive(dentry)) {
if (simple_positive(dentry)) {
if (d_is_dir(dentry))
simple_rmdir(d_inode(parent), dentry);
else

2
arch/tile/kernel/stack.c
View File

@ -332,7 +332,7 @@ static void describe_addr(struct KBacktraceIterator *kbt,
}
if (vma->vm_file) {
p = d_path(&vma->vm_file->f_path, buf, bufsize);
p = file_path(vma->vm_file, buf, bufsize);
if (IS_ERR(p))
p = "?";
name = kbasename(p);

2
arch/tile/mm/elf.c
View File

@ -56,7 +56,7 @@ static int notify_exec(struct mm_struct *mm)
if (exe_file == NULL)
goto done_free;
path = d_path(&exe_file->f_path, buf, PAGE_SIZE);
path = file_path(exe_file, buf, PAGE_SIZE);
if (IS_ERR(path))
goto done_put;

10
drivers/block/drbd/drbd_debugfs.c
View File

@ -419,14 +419,6 @@ static int in_flight_summary_show(struct seq_file *m, void *pos)
return 0;
}
/* simple_positive(file->f_path.dentry) respectively debugfs_positive(),
* but neither is "reachable" from here.
* So we have our own inline version of it above. :-( */
static inline int debugfs_positive(struct dentry *dentry)
{
return d_really_is_positive(dentry) && !d_unhashed(dentry);
}
/* make sure at *open* time that the respective object won't go away. */
static int drbd_single_open(struct file *file, int (*show)(struct seq_file *, void *),
void *data, struct kref *kref,
@ -444,7 +436,7 @@ static int drbd_single_open(struct file *file, int (*show)(struct seq_file *, vo
/* serialize with d_delete() */
mutex_lock(&d_inode(parent)->i_mutex);
/* Make sure the object is still alive */
if (debugfs_positive(file->f_path.dentry)
if (simple_positive(file->f_path.dentry)
&& kref_get_unless_zero(kref))
ret = 0;
mutex_unlock(&d_inode(parent)->i_mutex);

2
drivers/block/loop.c
View File

@ -588,7 +588,7 @@ static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf)
spin_lock_irq(&lo->lo_lock);
if (lo->lo_backing_file)
p = d_path(&lo->lo_backing_file->f_path, buf, PAGE_SIZE - 1);
p = file_path(lo->lo_backing_file, buf, PAGE_SIZE - 1);
spin_unlock_irq(&lo->lo_lock);
if (IS_ERR_OR_NULL(p))

2
drivers/infiniband/hw/ipath/ipath_fs.c
View File

@ -277,7 +277,7 @@ static int remove_file(struct dentry *parent, char *name)
}
spin_lock(&tmp->d_lock);
if (!d_unhashed(tmp) && d_really_is_positive(tmp)) {
if (simple_positive(tmp)) {
dget_dlock(tmp);
__d_drop(tmp);
spin_unlock(&tmp->d_lock);

2
drivers/infiniband/hw/qib/qib_fs.c
View File

@ -455,7 +455,7 @@ static int remove_file(struct dentry *parent, char *name)
}
spin_lock(&tmp->d_lock);
if (!d_unhashed(tmp) && d_really_is_positive(tmp)) {
if (simple_positive(tmp)) {
__d_drop(tmp);
spin_unlock(&tmp->d_lock);
simple_unlink(d_inode(parent), tmp);

4
drivers/md/bitmap.c
View File

@ -839,7 +839,7 @@ static void bitmap_file_kick(struct bitmap *bitmap)
if (bitmap->storage.file) {
path = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (path)
ptr = d_path(&bitmap->storage.file->f_path,
ptr = file_path(bitmap->storage.file,
path, PAGE_SIZE);
printk(KERN_ALERT
@ -1927,7 +1927,7 @@ void bitmap_status(struct seq_file *seq, struct bitmap *bitmap)
chunk_kb ? "KB" : "B");
if (bitmap->storage.file) {
seq_printf(seq, ", file: ");
seq_path(seq, &bitmap->storage.file->f_path, " \t\n");
seq_file_path(seq, bitmap->storage.file, " \t\n");
}
seq_printf(seq, "\n");

2
drivers/md/md.c
View File

@ -5766,7 +5766,7 @@ static int get_bitmap_file(struct mddev *mddev, void __user * arg)
/* bitmap disabled, zero the first byte and copy out */
if (!mddev->bitmap_info.file)
file->pathname[0] = '\0';
else if ((ptr = d_path(&mddev->bitmap_info.file->f_path,
else if ((ptr = file_path(mddev->bitmap_info.file,
file->pathname, sizeof(file->pathname))),
IS_ERR(ptr))
err = PTR_ERR(ptr);

2
drivers/usb/gadget/function/f_mass_storage.c
View File

@ -2936,7 +2936,7 @@ int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg,
if (fsg_lun_is_open(lun)) {
p = "(error)";
if (pathbuf) {
p = d_path(&lun->filp->f_path, pathbuf, PATH_MAX);
p = file_path(lun->filp, pathbuf, PATH_MAX);
if (IS_ERR(p))
p = "(error)";
}

2
drivers/usb/gadget/function/storage_common.c
View File

@ -341,7 +341,7 @@ ssize_t fsg_show_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
down_read(filesem);
if (fsg_lun_is_open(curlun)) { /* Get the complete pathname */
p = d_path(&curlun->filp->f_path, buf, PAGE_SIZE - 1);
p = file_path(curlun->filp, buf, PAGE_SIZE - 1);
if (IS_ERR(p))
rc = PTR_ERR(p);
else {

2
fs/affs/affs.h
View File

@ -64,7 +64,7 @@ struct affs_inode_info {
/* short cut to get to the affs specific inode data */
static inline struct affs_inode_info *AFFS_I(struct inode *inode)
{
return list_entry(inode, struct affs_inode_info, vfs_inode);
return container_of(inode, struct affs_inode_info, vfs_inode);
}
/*

5
fs/autofs4/autofs_i.h
View File

@ -238,11 +238,6 @@ static inline u64 autofs4_get_ino(struct autofs_sb_info *sbi)
return d_inode(sbi->sb->s_root)->i_ino;
}
static inline int simple_positive(struct dentry *dentry)
{
return d_really_is_positive(dentry) && !d_unhashed(dentry);
}
static inline void __autofs4_add_expiring(struct dentry *dentry)
{
struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);

2
fs/befs/befs.h
View File

@ -112,7 +112,7 @@ BEFS_SB(const struct super_block *super)
static inline struct befs_inode_info *
BEFS_I(const struct inode *inode)
{
return list_entry(inode, struct befs_inode_info, vfs_inode);
return container_of(inode, struct befs_inode_info, vfs_inode);
}
static inline befs_blocknr_t

4
fs/binfmt_elf.c
View File

@ -1530,7 +1530,7 @@ static int fill_files_note(struct memelfnote *note)
file = vma->vm_file;
if (!file)
continue;
filename = d_path(&file->f_path, name_curpos, remaining);
filename = file_path(file, name_curpos, remaining);
if (IS_ERR(filename)) {
if (PTR_ERR(filename) == -ENAMETOOLONG) {
vfree(data);
@ -1540,7 +1540,7 @@ static int fill_files_note(struct memelfnote *note)
continue;
}
/* d_path() fills at the end, move name down */
/* file_path() fills at the end, move name down */
/* n = strlen(filename) + 1: */
n = (name_curpos + remaining) - filename;
remaining = filename - name_curpos;

10
fs/block_dev.c
View File

@ -152,6 +152,9 @@ blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
if (IS_DAX(inode))
return dax_do_io(iocb, inode, iter, offset, blkdev_get_block,
NULL, DIO_SKIP_DIO_COUNT);
return __blockdev_direct_IO(iocb, inode, I_BDEV(inode), iter, offset,
blkdev_get_block, NULL, NULL,
DIO_SKIP_DIO_COUNT);
@ -443,6 +446,12 @@ long bdev_direct_access(struct block_device *bdev, sector_t sector,
long avail;
const struct block_device_operations *ops = bdev->bd_disk->fops;
/*
* The device driver is allowed to sleep, in order to make the
* memory directly accessible.
*/
might_sleep();
if (size < 0)
return size;
if (!ops->direct_access)
@ -1170,6 +1179,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
bdev->bd_disk = disk;
bdev->bd_queue = disk->queue;
bdev->bd_contains = bdev;
bdev->bd_inode->i_flags = disk->fops->direct_access ? S_DAX : 0;
if (!partno) {
ret = -ENXIO;
bdev->bd_part = disk_get_part(disk, partno);

2
fs/btrfs/file.c
View File

@ -1748,7 +1748,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
}
current->backing_dev_info = inode_to_bdi(inode);
err = file_remove_suid(file);
err = file_remove_privs(file);
if (err) {
mutex_unlock(&inode->i_mutex);
goto out;

1
fs/cachefiles/internal.h
View File

@ -43,7 +43,6 @@ struct cachefiles_object {
loff_t i_size; /* object size */
unsigned long flags;
#define CACHEFILES_OBJECT_ACTIVE 0 /* T if marked active */
#define CACHEFILES_OBJECT_BURIED 1 /* T if preemptively buried */
atomic_t usage; /* object usage count */
uint8_t type; /* object type */
uint8_t new; /* T if object new */

33
fs/cachefiles/namei.c
View File

@ -97,7 +97,8 @@ static noinline void cachefiles_printk_object(struct cachefiles_object *object,
* call vfs_unlink(), vfs_rmdir() or vfs_rename()
*/
static void cachefiles_mark_object_buried(struct cachefiles_cache *cache,
struct dentry *dentry)
struct dentry *dentry,
enum fscache_why_object_killed why)
{
struct cachefiles_object *object;
struct rb_node *p;
@ -132,8 +133,9 @@ found_dentry:
pr_err("\n");
pr_err("Error: Can't preemptively bury live object\n");
cachefiles_printk_object(object, NULL);
} else if (test_and_set_bit(CACHEFILES_OBJECT_BURIED, &object->flags)) {
pr_err("Error: Object already preemptively buried\n");
} else {
if (why != FSCACHE_OBJECT_IS_STALE)
fscache_object_mark_killed(&object->fscache, why);
}
write_unlock(&cache->active_lock);
@ -265,7 +267,8 @@ requeue:
static int cachefiles_bury_object(struct cachefiles_cache *cache,
struct dentry *dir,
struct dentry *rep,
bool preemptive)
bool preemptive,
enum fscache_why_object_killed why)
{
struct dentry *grave, *trap;
struct path path, path_to_graveyard;
@ -289,7 +292,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
ret = vfs_unlink(d_inode(dir), rep, NULL);
if (preemptive)
cachefiles_mark_object_buried(cache, rep);
cachefiles_mark_object_buried(cache, rep, why);
}
mutex_unlock(&d_inode(dir)->i_mutex);
@ -394,7 +397,7 @@ try_again:
"Rename failed with error %d", ret);
if (preemptive)
cachefiles_mark_object_buried(cache, rep);
cachefiles_mark_object_buried(cache, rep, why);
}
unlock_rename(cache->graveyard, dir);
@ -422,7 +425,7 @@ int cachefiles_delete_object(struct cachefiles_cache *cache,
mutex_lock_nested(&d_inode(dir)->i_mutex, I_MUTEX_PARENT);
if (test_bit(CACHEFILES_OBJECT_BURIED, &object->flags)) {
if (test_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->fscache.flags)) {
/* object allocation for the same key preemptively deleted this
* object's file so that it could create its own file */
_debug("object preemptively buried");
@ -433,7 +436,8 @@ int cachefiles_delete_object(struct cachefiles_cache *cache,
* may have been renamed */
if (dir == object->dentry->d_parent) {
ret = cachefiles_bury_object(cache, dir,
object->dentry, false);
object->dentry, false,
FSCACHE_OBJECT_WAS_RETIRED);
} else {
/* it got moved, presumably by cachefilesd culling it,
* so it's no longer in the key path and we can ignore
@ -522,7 +526,7 @@ lookup_again:
if (d_is_negative(next)) {
ret = cachefiles_has_space(cache, 1, 0);
if (ret < 0)
goto create_error;
goto no_space_error;
path.dentry = dir;
ret = security_path_mkdir(&path, next, 0);
@ -551,7 +555,7 @@ lookup_again:
if (d_is_negative(next)) {
ret = cachefiles_has_space(cache, 1, 0);
if (ret < 0)
goto create_error;
goto no_space_error;
path.dentry = dir;
ret = security_path_mknod(&path, next, S_IFREG, 0);
@ -602,7 +606,8 @@ lookup_again:
* mutex) */
object->dentry = NULL;
ret = cachefiles_bury_object(cache, dir, next, true);
ret = cachefiles_bury_object(cache, dir, next, true,
FSCACHE_OBJECT_IS_STALE);
dput(next);
next = NULL;
@ -610,6 +615,7 @@ lookup_again:
goto delete_error;
_debug("redo lookup");
fscache_object_retrying_stale(&object->fscache);
goto lookup_again;
}
}
@ -662,6 +668,8 @@ lookup_again:
_leave(" = 0 [%lu]", d_backing_inode(object->dentry)->i_ino);
return 0;
no_space_error:
fscache_object_mark_killed(&object->fscache, FSCACHE_OBJECT_NO_SPACE);
create_error:
_debug("create error %d", ret);
if (ret == -EIO)
@ -927,7 +935,8 @@ int cachefiles_cull(struct cachefiles_cache *cache, struct dentry *dir,
/* actually remove the victim (drops the dir mutex) */
_debug("bury");
ret = cachefiles_bury_object(cache, dir, victim, false);
ret = cachefiles_bury_object(cache, dir, victim, false,
FSCACHE_OBJECT_WAS_CULLED);
if (ret < 0)
goto error;

2
fs/ceph/file.c
View File

@ -962,7 +962,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
pos = iocb->ki_pos;
count = iov_iter_count(from);
err = file_remove_suid(file);
err = file_remove_privs(file);
if (err)
goto out;

2
fs/coda/coda_linux.h
View File

@ -79,7 +79,7 @@ void coda_sysctl_clean(void);
static inline struct coda_inode_info *ITOC(struct inode *inode)
{
return list_entry(inode, struct coda_inode_info, vfs_inode);
return container_of(inode, struct coda_inode_info, vfs_inode);
}
static __inline__ struct CodaFid *coda_i2f(struct inode *inode)

2
fs/configfs/inode.c
View File

@ -236,7 +236,7 @@ void configfs_drop_dentry(struct configfs_dirent * sd, struct dentry * parent)
if (dentry) {
spin_lock(&dentry->d_lock);
if (!d_unhashed(dentry) && d_really_is_positive(dentry)) {
if (simple_positive(dentry)) {
dget_dlock(dentry);
__d_drop(dentry);
spin_unlock(&dentry->d_lock);

2
fs/coredump.c
View File

@ -140,7 +140,7 @@ static int cn_print_exe_file(struct core_name *cn)
goto put_exe_file;
}
path = d_path(&exe_file->f_path, pathbuf, PATH_MAX);
path = file_path(exe_file, pathbuf, PATH_MAX);
if (IS_ERR(path)) {
ret = PTR_ERR(path);
goto free_buf;

8
fs/dax.c
View File

@ -155,7 +155,7 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
}
if (iov_iter_rw(iter) == WRITE)
len = copy_from_iter(addr, max - pos, iter);
len = copy_from_iter_nocache(addr, max - pos, iter);
else if (!hole)
len = copy_to_iter(addr, max - pos, iter);
else
@ -209,7 +209,8 @@ ssize_t dax_do_io(struct kiocb *iocb, struct inode *inode,
}
/* Protects against truncate */
inode_dio_begin(inode);
if (!(flags & DIO_SKIP_DIO_COUNT))
inode_dio_begin(inode);
retval = dax_io(inode, iter, pos, end, get_block, &bh);
@ -219,7 +220,8 @@ ssize_t dax_do_io(struct kiocb *iocb, struct inode *inode,
if ((retval > 0) && end_io)
end_io(iocb, pos, retval, bh.b_private);
inode_dio_end(inode);
if (!(flags & DIO_SKIP_DIO_COUNT))
inode_dio_end(inode);
out:
return retval;
}

5
fs/dcache.c
View File

@ -1673,7 +1673,8 @@ void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op)
DCACHE_OP_COMPARE |
DCACHE_OP_REVALIDATE |
DCACHE_OP_WEAK_REVALIDATE |
DCACHE_OP_DELETE ));
DCACHE_OP_DELETE |
DCACHE_OP_SELECT_INODE));
dentry->d_op = op;
if (!op)
return;
@ -1689,6 +1690,8 @@ void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op)
dentry->d_flags |= DCACHE_OP_DELETE;
if (op->d_prune)
dentry->d_flags |= DCACHE_OP_PRUNE;
if (op->d_select_inode)
dentry->d_flags |= DCACHE_OP_SELECT_INODE;
}
EXPORT_SYMBOL(d_set_d_op);

11
fs/debugfs/inode.c
View File

@ -44,11 +44,6 @@ static struct inode *debugfs_get_inode(struct super_block *sb)
return inode;
}
static inline int debugfs_positive(struct dentry *dentry)
{
return d_really_is_positive(dentry) && !d_unhashed(dentry);
}
struct debugfs_mount_opts {
kuid_t uid;
kgid_t gid;
@ -522,7 +517,7 @@ static int __debugfs_remove(struct dentry *dentry, struct dentry *parent)
{
int ret = 0;
if (debugfs_positive(dentry)) {
if (simple_positive(dentry)) {
dget(dentry);
if (d_is_dir(dentry))
ret = simple_rmdir(d_inode(parent), dentry);
@ -602,7 +597,7 @@ void debugfs_remove_recursive(struct dentry *dentry)
*/
spin_lock(&parent->d_lock);
list_for_each_entry(child, &parent->d_subdirs, d_child) {
if (!debugfs_positive(child))
if (!simple_positive(child))
continue;
/* perhaps simple_empty(child) makes more sense */
@ -623,7 +618,7 @@ void debugfs_remove_recursive(struct dentry *dentry)
* from d_subdirs. When releasing the parent->d_lock we can
* no longer trust that the next pointer is valid.
* Restart the loop. We'll skip this one with the
* debugfs_positive() check.
* simple_positive() check.
*/
goto loop;
}

6
fs/exofs/dir.c
View File

@ -44,12 +44,6 @@ static inline void exofs_put_page(struct page *page)
page_cache_release(page);
}
/* Accesses dir's inode->i_size must be called under inode lock */
static inline unsigned long dir_pages(struct inode *inode)
{
return (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
}
static unsigned exofs_last_byte(struct inode *inode, unsigned long page_nr)
{
loff_t last_byte = inode->i_size;

5
fs/ext2/dir.c
View File

@ -70,11 +70,6 @@ static inline void ext2_put_page(struct page *page)
page_cache_release(page);
}
static inline unsigned long dir_pages(struct inode *inode)
{
return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
}
/*
* Return the offset into page `page_nr' of the last valid
* byte in that page, plus one.

2
fs/ext4/super.c
View File

@ -452,7 +452,7 @@ void __ext4_error_file(struct file *file, const char *function,
es = EXT4_SB(inode->i_sb)->s_es;
es->s_last_error_ino = cpu_to_le32(inode->i_ino);
if (ext4_error_ratelimit(inode->i_sb)) {
path = d_path(&(file->f_path), pathname, sizeof(pathname));
path = file_path(file, pathname, sizeof(pathname));
if (IS_ERR(path))
path = "(unknown)";
va_start(args, fmt);

77
fs/file.c
View File

@ -147,6 +147,13 @@ static int expand_fdtable(struct files_struct *files, int nr)
spin_unlock(&files->file_lock);
new_fdt = alloc_fdtable(nr);
/* make sure all __fd_install() have seen resize_in_progress
* or have finished their rcu_read_lock_sched() section.
*/
if (atomic_read(&files->count) > 1)
synchronize_sched();
spin_lock(&files->file_lock);
if (!new_fdt)
return -ENOMEM;
@ -158,21 +165,14 @@ static int expand_fdtable(struct files_struct *files, int nr)
__free_fdtable(new_fdt);
return -EMFILE;
}
/*
* Check again since another task may have expanded the fd table while
* we dropped the lock
*/
cur_fdt = files_fdtable(files);
if (nr >= cur_fdt->max_fds) {
/* Continue as planned */
copy_fdtable(new_fdt, cur_fdt);
rcu_assign_pointer(files->fdt, new_fdt);
if (cur_fdt != &files->fdtab)
call_rcu(&cur_fdt->rcu, free_fdtable_rcu);
} else {
/* Somebody else expanded, so undo our attempt */
__free_fdtable(new_fdt);
}
BUG_ON(nr < cur_fdt->max_fds);
copy_fdtable(new_fdt, cur_fdt);
rcu_assign_pointer(files->fdt, new_fdt);
if (cur_fdt != &files->fdtab)
call_rcu(&cur_fdt->rcu, free_fdtable_rcu);
/* coupled with smp_rmb() in __fd_install() */
smp_wmb();
return 1;
}
@ -185,21 +185,38 @@ static int expand_fdtable(struct files_struct *files, int nr)
* The files->file_lock should be held on entry, and will be held on exit.
*/
static int expand_files(struct files_struct *files, int nr)
__releases(files->file_lock)
__acquires(files->file_lock)
{
struct fdtable *fdt;
int expanded = 0;
repeat:
fdt = files_fdtable(files);
/* Do we need to expand? */
if (nr < fdt->max_fds)
return 0;
return expanded;
/* Can we expand? */
if (nr >= sysctl_nr_open)
return -EMFILE;
if (unlikely(files->resize_in_progress)) {
spin_unlock(&files->file_lock);
expanded = 1;
wait_event(files->resize_wait, !files->resize_in_progress);
spin_lock(&files->file_lock);
goto repeat;
}
/* All good, so we try */
return expand_fdtable(files, nr);
files->resize_in_progress = true;
expanded = expand_fdtable(files, nr);
files->resize_in_progress = false;
wake_up_all(&files->resize_wait);
return expanded;
}
static inline void __set_close_on_exec(int fd, struct fdtable *fdt)
@ -256,6 +273,8 @@ struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
atomic_set(&newf->count, 1);
spin_lock_init(&newf->file_lock);
newf->resize_in_progress = false;
init_waitqueue_head(&newf->resize_wait);
newf->next_fd = 0;
new_fdt = &newf->fdtab;
new_fdt->max_fds = NR_OPEN_DEFAULT;
@ -553,11 +572,21 @@ void __fd_install(struct files_struct *files, unsigned int fd,
struct file *file)
{
struct fdtable *fdt;
spin_lock(&files->file_lock);
fdt = files_fdtable(files);
might_sleep();
rcu_read_lock_sched();
while (unlikely(files->resize_in_progress)) {
rcu_read_unlock_sched();
wait_event(files->resize_wait, !files->resize_in_progress);
rcu_read_lock_sched();
}
/* coupled with smp_wmb() in expand_fdtable() */
smp_rmb();
fdt = rcu_dereference_sched(files->fdt);
BUG_ON(fdt->fd[fd] != NULL);
rcu_assign_pointer(fdt->fd[fd], file);
spin_unlock(&files->file_lock);
rcu_read_unlock_sched();
}
void fd_install(unsigned int fd, struct file *file)
@ -635,11 +664,17 @@ static struct file *__fget(unsigned int fd, fmode_t mask)
struct file *file;
rcu_read_lock();
loop:
file = fcheck_files(files, fd);
if (file) {
/* File object ref couldn't be taken */
if ((file->f_mode & mask) || !get_file_rcu(file))
/* File object ref couldn't be taken.
* dup2() atomicity guarantee is the reason
* we loop to catch the new file (or NULL pointer)
*/
if (file->f_mode & mask)
file = NULL;
else if (!get_file_rcu(file))
goto loop;
}
rcu_read_unlock();

1
fs/file_table.c
View File

@ -20,7 +20,6 @@
#include <linux/cdev.h>
#include <linux/fsnotify.h>
#include <linux/sysctl.h>
#include <linux/lglock.h>
#include <linux/percpu_counter.h>
#include <linux/percpu.h>
#include <linux/hardirq.h>

7
fs/freevxfs/vxfs_lookup.c
View File

@ -61,13 +61,6 @@ const struct file_operations vxfs_dir_operations = {
.iterate = vxfs_readdir,
};
static inline u_long
dir_pages(struct inode *inode)
{
return (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
}
static inline u_long
dir_blocks(struct inode *ip)
{

8
fs/fscache/cookie.c
View File

@ -327,7 +327,8 @@ static int fscache_alloc_object(struct fscache_cache *cache,
object_already_extant:
ret = -ENOBUFS;
if (fscache_object_is_dead(object)) {
if (fscache_object_is_dying(object) ||
fscache_cache_is_broken(object)) {
spin_unlock(&cookie->lock);
goto error;
}
@ -671,7 +672,7 @@ int __fscache_check_consistency(struct fscache_cookie *cookie)
if (!op)
return -ENOMEM;
fscache_operation_init(op, NULL, NULL);
fscache_operation_init(op, NULL, NULL, NULL);
op->flags = FSCACHE_OP_MYTHREAD |
(1 << FSCACHE_OP_WAITING) |
(1 << FSCACHE_OP_UNUSE_COOKIE);
@ -695,8 +696,7 @@ int __fscache_check_consistency(struct fscache_cookie *cookie)
/* the work queue now carries its own ref on the object */
spin_unlock(&cookie->lock);
ret = fscache_wait_for_operation_activation(object, op,
NULL, NULL, NULL);
ret = fscache_wait_for_operation_activation(object, op, NULL, NULL);
if (ret == 0) {
/* ask the cache to honour the operation */
ret = object->cache->ops->check_consistency(op);

12
fs/fscache/internal.h
View File

@ -124,8 +124,7 @@ extern int fscache_submit_exclusive_op(struct fscache_object *,
struct fscache_operation *);
extern int fscache_submit_op(struct fscache_object *,
struct fscache_operation *);
extern int fscache_cancel_op(struct fscache_operation *,
void (*)(struct fscache_operation *));
extern int fscache_cancel_op(struct fscache_operation *, bool);
extern void fscache_cancel_all_ops(struct fscache_object *);
extern void fscache_abort_object(struct fscache_object *);
extern void fscache_start_operations(struct fscache_object *);
@ -138,8 +137,7 @@ extern int fscache_wait_for_deferred_lookup(struct fscache_cookie *);
extern int fscache_wait_for_operation_activation(struct fscache_object *,
struct fscache_operation *,
atomic_t *,
atomic_t *,
void (*)(struct fscache_operation *));
atomic_t *);
extern void fscache_invalidate_writes(struct fscache_cookie *);
/*
@ -164,6 +162,7 @@ extern atomic_t fscache_n_op_pend;
extern atomic_t fscache_n_op_run;
extern atomic_t fscache_n_op_enqueue;
extern atomic_t fscache_n_op_deferred_release;
extern atomic_t fscache_n_op_initialised;
extern atomic_t fscache_n_op_release;
extern atomic_t fscache_n_op_gc;
extern atomic_t fscache_n_op_cancelled;
@ -271,6 +270,11 @@ extern atomic_t fscache_n_cop_write_page;
extern atomic_t fscache_n_cop_uncache_page;
extern atomic_t fscache_n_cop_dissociate_pages;
extern atomic_t fscache_n_cache_no_space_reject;
extern atomic_t fscache_n_cache_stale_objects;
extern atomic_t fscache_n_cache_retired_objects;
extern atomic_t fscache_n_cache_culled_objects;
static inline void fscache_stat(atomic_t *stat)
{
atomic_inc(stat);

69
fs/fscache/object.c
View File

@ -327,6 +327,17 @@ void fscache_object_init(struct fscache_object *object,
}
EXPORT_SYMBOL(fscache_object_init);
/*
* Mark the object as no longer being live, making sure that we synchronise
* against op submission.
*/
static inline void fscache_mark_object_dead(struct fscache_object *object)
{
spin_lock(&object->lock);
clear_bit(FSCACHE_OBJECT_IS_LIVE, &object->flags);
spin_unlock(&object->lock);
}
/*
* Abort object initialisation before we start it.
*/
@ -610,6 +621,8 @@ static const struct fscache_state *fscache_lookup_failure(struct fscache_object
object->cache->ops->lookup_complete(object);
fscache_stat_d(&fscache_n_cop_lookup_complete);
set_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->flags);
cookie = object->cookie;
set_bit(FSCACHE_COOKIE_UNAVAILABLE, &cookie->flags);
if (test_and_clear_bit(FSCACHE_COOKIE_LOOKING_UP, &cookie->flags))
@ -629,7 +642,7 @@ static const struct fscache_state *fscache_kill_object(struct fscache_object *ob
_enter("{OBJ%x,%d,%d},%d",
object->debug_id, object->n_ops, object->n_children, event);
clear_bit(FSCACHE_OBJECT_IS_LIVE, &object->flags);
fscache_mark_object_dead(object);
object->oob_event_mask = 0;
if (list_empty(&object->dependents) &&
@ -948,7 +961,8 @@ static const struct fscache_state *_fscache_invalidate_object(struct fscache_obj
if (!op)
goto nomem;
fscache_operation_init(op, object->cache->ops->invalidate_object, NULL);
fscache_operation_init(op, object->cache->ops->invalidate_object,
NULL, NULL);
op->flags = FSCACHE_OP_ASYNC |
(1 << FSCACHE_OP_EXCLUSIVE) |
(1 << FSCACHE_OP_UNUSE_COOKIE);
@ -974,13 +988,13 @@ static const struct fscache_state *_fscache_invalidate_object(struct fscache_obj
return transit_to(UPDATE_OBJECT);
nomem:
clear_bit(FSCACHE_OBJECT_IS_LIVE, &object->flags);
fscache_mark_object_dead(object);
fscache_unuse_cookie(object);
_leave(" [ENOMEM]");
return transit_to(KILL_OBJECT);
submit_op_failed:
clear_bit(FSCACHE_OBJECT_IS_LIVE, &object->flags);
fscache_mark_object_dead(object);
spin_unlock(&cookie->lock);
fscache_unuse_cookie(object);
kfree(op);
@ -1016,3 +1030,50 @@ static const struct fscache_state *fscache_update_object(struct fscache_object *
_leave("");
return transit_to(WAIT_FOR_CMD);
}
/**
* fscache_object_retrying_stale - Note retrying stale object
* @object: The object that will be retried
*
* Note that an object lookup found an on-disk object that was adjudged to be
* stale and has been deleted. The lookup will be retried.
*/
void fscache_object_retrying_stale(struct fscache_object *object)
{
fscache_stat(&fscache_n_cache_no_space_reject);
}
EXPORT_SYMBOL(fscache_object_retrying_stale);
/**
* fscache_object_mark_killed - Note that an object was killed
* @object: The object that was culled
* @why: The reason the object was killed.
*
* Note that an object was killed. Returns true if the object was
* already marked killed, false if it wasn't.
*/
void fscache_object_mark_killed(struct fscache_object *object,
enum fscache_why_object_killed why)
{
if (test_and_set_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->flags)) {
pr_err("Error: Object already killed by cache [%s]\n",
object->cache->identifier);
return;
}
switch (why) {
case FSCACHE_OBJECT_NO_SPACE:
fscache_stat(&fscache_n_cache_no_space_reject);
break;
case FSCACHE_OBJECT_IS_STALE:
fscache_stat(&fscache_n_cache_stale_objects);
break;
case FSCACHE_OBJECT_WAS_RETIRED:
fscache_stat(&fscache_n_cache_retired_objects);
break;
case FSCACHE_OBJECT_WAS_CULLED:
fscache_stat(&fscache_n_cache_culled_objects);
break;
}
}
EXPORT_SYMBOL(fscache_object_mark_killed);

292
fs/fscache/operation.c
View File

@ -20,6 +20,35 @@
atomic_t fscache_op_debug_id;
EXPORT_SYMBOL(fscache_op_debug_id);
static void fscache_operation_dummy_cancel(struct fscache_operation *op)
{
}
/**
* fscache_operation_init - Do basic initialisation of an operation
* @op: The operation to initialise
* @release: The release function to assign
*
* Do basic initialisation of an operation. The caller must still set flags,
* object and processor if needed.
*/
void fscache_operation_init(struct fscache_operation *op,
fscache_operation_processor_t processor,
fscache_operation_cancel_t cancel,
fscache_operation_release_t release)
{
INIT_WORK(&op->work, fscache_op_work_func);
atomic_set(&op->usage, 1);
op->state = FSCACHE_OP_ST_INITIALISED;
op->debug_id = atomic_inc_return(&fscache_op_debug_id);
op->processor = processor;
op->cancel = cancel ?: fscache_operation_dummy_cancel;
op->release = release;
INIT_LIST_HEAD(&op->pend_link);
fscache_stat(&fscache_n_op_initialised);
}
EXPORT_SYMBOL(fscache_operation_init);
/**
* fscache_enqueue_operation - Enqueue an operation for processing
* @op: The operation to enqueue
@ -75,69 +104,6 @@ static void fscache_run_op(struct fscache_object *object,
fscache_stat(&fscache_n_op_run);
}
/*
* submit an exclusive operation for an object
* - other ops are excluded from running simultaneously with this one
* - this gets any extra refs it needs on an op
*/
int fscache_submit_exclusive_op(struct fscache_object *object,
struct fscache_operation *op)
{
int ret;
_enter("{OBJ%x OP%x},", object->debug_id, op->debug_id);
ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED);
ASSERTCMP(atomic_read(&op->usage), >, 0);
spin_lock(&object->lock);
ASSERTCMP(object->n_ops, >=, object->n_in_progress);
ASSERTCMP(object->n_ops, >=, object->n_exclusive);
ASSERT(list_empty(&op->pend_link));
op->state = FSCACHE_OP_ST_PENDING;
if (fscache_object_is_active(object)) {
op->object = object;
object->n_ops++;
object->n_exclusive++; /* reads and writes must wait */
if (object->n_in_progress > 0) {
atomic_inc(&op->usage);
list_add_tail(&op->pend_link, &object->pending_ops);
fscache_stat(&fscache_n_op_pend);
} else if (!list_empty(&object->pending_ops)) {
atomic_inc(&op->usage);
list_add_tail(&op->pend_link, &object->pending_ops);
fscache_stat(&fscache_n_op_pend);
fscache_start_operations(object);
} else {
ASSERTCMP(object->n_in_progress, ==, 0);
fscache_run_op(object, op);
}
/* need to issue a new write op after this */
clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags);
ret = 0;
} else if (test_bit(FSCACHE_OBJECT_IS_LOOKED_UP, &object->flags)) {
op->object = object;
object->n_ops++;
object->n_exclusive++; /* reads and writes must wait */
atomic_inc(&op->usage);
list_add_tail(&op->pend_link, &object->pending_ops);
fscache_stat(&fscache_n_op_pend);
ret = 0;
} else {
/* If we're in any other state, there must have been an I/O
* error of some nature.
*/
ASSERT(test_bit(FSCACHE_IOERROR, &object->cache->flags));
ret = -EIO;
}
spin_unlock(&object->lock);
return ret;
}
/*
* report an unexpected submission
*/
@ -175,6 +141,87 @@ static void fscache_report_unexpected_submission(struct fscache_object *object,
dump_stack();
}
/*
* submit an exclusive operation for an object
* - other ops are excluded from running simultaneously with this one
* - this gets any extra refs it needs on an op
*/
int fscache_submit_exclusive_op(struct fscache_object *object,
struct fscache_operation *op)
{
const struct fscache_state *ostate;
unsigned long flags;
int ret;
_enter("{OBJ%x OP%x},", object->debug_id, op->debug_id);
ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED);
ASSERTCMP(atomic_read(&op->usage), >, 0);
spin_lock(&object->lock);
ASSERTCMP(object->n_ops, >=, object->n_in_progress);
ASSERTCMP(object->n_ops, >=, object->n_exclusive);
ASSERT(list_empty(&op->pend_link));
ostate = object->state;
smp_rmb();
op->state = FSCACHE_OP_ST_PENDING;
flags = READ_ONCE(object->flags);
if (unlikely(!(flags & BIT(FSCACHE_OBJECT_IS_LIVE)))) {
fscache_stat(&fscache_n_op_rejected);
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else if (unlikely(fscache_cache_is_broken(object))) {
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -EIO;
} else if (flags & BIT(FSCACHE_OBJECT_IS_AVAILABLE)) {
op->object = object;
object->n_ops++;
object->n_exclusive++; /* reads and writes must wait */
if (object->n_in_progress > 0) {
atomic_inc(&op->usage);
list_add_tail(&op->pend_link, &object->pending_ops);
fscache_stat(&fscache_n_op_pend);
} else if (!list_empty(&object->pending_ops)) {
atomic_inc(&op->usage);
list_add_tail(&op->pend_link, &object->pending_ops);
fscache_stat(&fscache_n_op_pend);
fscache_start_operations(object);
} else {
ASSERTCMP(object->n_in_progress, ==, 0);
fscache_run_op(object, op);
}
/* need to issue a new write op after this */
clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags);
ret = 0;
} else if (flags & BIT(FSCACHE_OBJECT_IS_LOOKED_UP)) {
op->object = object;
object->n_ops++;
object->n_exclusive++; /* reads and writes must wait */
atomic_inc(&op->usage);
list_add_tail(&op->pend_link, &object->pending_ops);
fscache_stat(&fscache_n_op_pend);
ret = 0;
} else if (flags & BIT(FSCACHE_OBJECT_KILLED_BY_CACHE)) {
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else {
fscache_report_unexpected_submission(object, op, ostate);
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
}
spin_unlock(&object->lock);
return ret;
}
/*
* submit an operation for an object
* - objects may be submitted only in the following states:
@ -187,6 +234,7 @@ int fscache_submit_op(struct fscache_object *object,
struct fscache_operation *op)
{
const struct fscache_state *ostate;
unsigned long flags;
int ret;
_enter("{OBJ%x OP%x},{%u}",
@ -204,7 +252,17 @@ int fscache_submit_op(struct fscache_object *object,
smp_rmb();
op->state = FSCACHE_OP_ST_PENDING;
if (fscache_object_is_active(object)) {
flags = READ_ONCE(object->flags);
if (unlikely(!(flags & BIT(FSCACHE_OBJECT_IS_LIVE)))) {
fscache_stat(&fscache_n_op_rejected);
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else if (unlikely(fscache_cache_is_broken(object))) {
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -EIO;
} else if (flags & BIT(FSCACHE_OBJECT_IS_AVAILABLE)) {
op->object = object;
object->n_ops++;
@ -222,23 +280,21 @@ int fscache_submit_op(struct fscache_object *object,
fscache_run_op(object, op);
}
ret = 0;
} else if (test_bit(FSCACHE_OBJECT_IS_LOOKED_UP, &object->flags)) {
} else if (flags & BIT(FSCACHE_OBJECT_IS_LOOKED_UP)) {
op->object = object;
object->n_ops++;
atomic_inc(&op->usage);
list_add_tail(&op->pend_link, &object->pending_ops);
fscache_stat(&fscache_n_op_pend);
ret = 0;
} else if (fscache_object_is_dying(object)) {
fscache_stat(&fscache_n_op_rejected);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else if (!test_bit(FSCACHE_IOERROR, &object->cache->flags)) {
fscache_report_unexpected_submission(object, op, ostate);
ASSERT(!fscache_object_is_active(object));
} else if (flags & BIT(FSCACHE_OBJECT_KILLED_BY_CACHE)) {
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else {
fscache_report_unexpected_submission(object, op, ostate);
ASSERT(!fscache_object_is_active(object));
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
}
@ -293,9 +349,10 @@ void fscache_start_operations(struct fscache_object *object)
* cancel an operation that's pending on an object
*/
int fscache_cancel_op(struct fscache_operation *op,
void (*do_cancel)(struct fscache_operation *))
bool cancel_in_progress_op)
{
struct fscache_object *object = op->object;
bool put = false;
int ret;
_enter("OBJ%x OP%x}", op->object->debug_id, op->debug_id);
@ -309,19 +366,37 @@ int fscache_cancel_op(struct fscache_operation *op,
ret = -EBUSY;
if (op->state == FSCACHE_OP_ST_PENDING) {
ASSERT(!list_empty(&op->pend_link));
fscache_stat(&fscache_n_op_cancelled);
list_del_init(&op->pend_link);
if (do_cancel)
do_cancel(op);
put = true;
fscache_stat(&fscache_n_op_cancelled);
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
object->n_exclusive--;
if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags))
wake_up_bit(&op->flags, FSCACHE_OP_WAITING);
ret = 0;
} else if (op->state == FSCACHE_OP_ST_IN_PROGRESS && cancel_in_progress_op) {
ASSERTCMP(object->n_in_progress, >, 0);
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
object->n_exclusive--;
object->n_in_progress--;
if (object->n_in_progress == 0)
fscache_start_operations(object);
fscache_stat(&fscache_n_op_cancelled);
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
object->n_exclusive--;
if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags))
wake_up_bit(&op->flags, FSCACHE_OP_WAITING);
fscache_put_operation(op);
ret = 0;
}
if (put)
fscache_put_operation(op);
spin_unlock(&object->lock);
_leave(" = %d", ret);
return ret;
@ -345,6 +420,7 @@ void fscache_cancel_all_ops(struct fscache_object *object)
list_del_init(&op->pend_link);
ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING);
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
@ -377,8 +453,12 @@ void fscache_op_complete(struct fscache_operation *op, bool cancelled)
spin_lock(&object->lock);
op->state = cancelled ?
FSCACHE_OP_ST_CANCELLED : FSCACHE_OP_ST_COMPLETE;
if (!cancelled) {
op->state = FSCACHE_OP_ST_COMPLETE;
} else {
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
}
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
object->n_exclusive--;
@ -409,9 +489,9 @@ void fscache_put_operation(struct fscache_operation *op)
return;
_debug("PUT OP");
ASSERTIFCMP(op->state != FSCACHE_OP_ST_COMPLETE,
ASSERTIFCMP(op->state != FSCACHE_OP_ST_INITIALISED &&
op->state != FSCACHE_OP_ST_COMPLETE,
op->state, ==, FSCACHE_OP_ST_CANCELLED);
op->state = FSCACHE_OP_ST_DEAD;
fscache_stat(&fscache_n_op_release);
@ -419,37 +499,39 @@ void fscache_put_operation(struct fscache_operation *op)
op->release(op);
op->release = NULL;
}
op->state = FSCACHE_OP_ST_DEAD;
object = op->object;
if (likely(object)) {
if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags))
atomic_dec(&object->n_reads);
if (test_bit(FSCACHE_OP_UNUSE_COOKIE, &op->flags))
fscache_unuse_cookie(object);
if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags))
atomic_dec(&object->n_reads);
if (test_bit(FSCACHE_OP_UNUSE_COOKIE, &op->flags))
fscache_unuse_cookie(object);
/* now... we may get called with the object spinlock held, so we
* complete the cleanup here only if we can immediately acquire the
* lock, and defer it otherwise */
if (!spin_trylock(&object->lock)) {
_debug("defer put");
fscache_stat(&fscache_n_op_deferred_release);
/* now... we may get called with the object spinlock held, so we
* complete the cleanup here only if we can immediately acquire the
* lock, and defer it otherwise */
if (!spin_trylock(&object->lock)) {
_debug("defer put");
fscache_stat(&fscache_n_op_deferred_release);
cache = object->cache;
spin_lock(&cache->op_gc_list_lock);
list_add_tail(&op->pend_link, &cache->op_gc_list);
spin_unlock(&cache->op_gc_list_lock);
schedule_work(&cache->op_gc);
_leave(" [defer]");
return;
}
cache = object->cache;
spin_lock(&cache->op_gc_list_lock);
list_add_tail(&op->pend_link, &cache->op_gc_list);
spin_unlock(&cache->op_gc_list_lock);
schedule_work(&cache->op_gc);
_leave(" [defer]");
return;
ASSERTCMP(object->n_ops, >, 0);
object->n_ops--;
if (object->n_ops == 0)
fscache_raise_event(object, FSCACHE_OBJECT_EV_CLEARED);
spin_unlock(&object->lock);
}
ASSERTCMP(object->n_ops, >, 0);
object->n_ops--;
if (object->n_ops == 0)
fscache_raise_event(object, FSCACHE_OBJECT_EV_CLEARED);
spin_unlock(&object->lock);
kfree(op);
_leave(" [done]");
}

86
fs/fscache/page.c
View File

@ -213,7 +213,7 @@ int __fscache_attr_changed(struct fscache_cookie *cookie)
return -ENOMEM;
}
fscache_operation_init(op, fscache_attr_changed_op, NULL);
fscache_operation_init(op, fscache_attr_changed_op, NULL, NULL);
op->flags = FSCACHE_OP_ASYNC |
(1 << FSCACHE_OP_EXCLUSIVE) |
(1 << FSCACHE_OP_UNUSE_COOKIE);
@ -239,7 +239,7 @@ nobufs_dec:
wake_cookie = __fscache_unuse_cookie(cookie);
nobufs:
spin_unlock(&cookie->lock);
kfree(op);
fscache_put_operation(op);
if (wake_cookie)
__fscache_wake_unused_cookie(cookie);
fscache_stat(&fscache_n_attr_changed_nobufs);
@ -248,6 +248,17 @@ nobufs:
}
EXPORT_SYMBOL(__fscache_attr_changed);
/*
* Handle cancellation of a pending retrieval op
*/
static void fscache_do_cancel_retrieval(struct fscache_operation *_op)
{
struct fscache_retrieval *op =
container_of(_op, struct fscache_retrieval, op);
atomic_set(&op->n_pages, 0);
}
/*
* release a retrieval op reference
*/
@ -258,11 +269,12 @@ static void fscache_release_retrieval_op(struct fscache_operation *_op)
_enter("{OP%x}", op->op.debug_id);
ASSERTCMP(atomic_read(&op->n_pages), ==, 0);
ASSERTIFCMP(op->op.state != FSCACHE_OP_ST_INITIALISED,
atomic_read(&op->n_pages), ==, 0);
fscache_hist(fscache_retrieval_histogram, op->start_time);
if (op->context)
fscache_put_context(op->op.object->cookie, op->context);
fscache_put_context(op->cookie, op->context);
_leave("");
}
@ -285,15 +297,24 @@ static struct fscache_retrieval *fscache_alloc_retrieval(
return NULL;
}
fscache_operation_init(&op->op, NULL, fscache_release_retrieval_op);
fscache_operation_init(&op->op, NULL,
fscache_do_cancel_retrieval,
fscache_release_retrieval_op);
op->op.flags = FSCACHE_OP_MYTHREAD |
(1UL << FSCACHE_OP_WAITING) |
(1UL << FSCACHE_OP_UNUSE_COOKIE);
op->cookie = cookie;
op->mapping = mapping;
op->end_io_func = end_io_func;
op->context = context;
op->start_time = jiffies;
INIT_LIST_HEAD(&op->to_do);
/* Pin the netfs read context in case we need to do the actual netfs
* read because we've encountered a cache read failure.
*/
if (context)
fscache_get_context(op->cookie, context);
return op;
}
@ -329,25 +350,13 @@ int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie)
return 0;
}
/*
* Handle cancellation of a pending retrieval op
*/
static void fscache_do_cancel_retrieval(struct fscache_operation *_op)
{
struct fscache_retrieval *op =
container_of(_op, struct fscache_retrieval, op);
atomic_set(&op->n_pages, 0);
}
/*
* wait for an object to become active (or dead)
*/
int fscache_wait_for_operation_activation(struct fscache_object *object,
struct fscache_operation *op,
atomic_t *stat_op_waits,
atomic_t *stat_object_dead,
void (*do_cancel)(struct fscache_operation *))
atomic_t *stat_object_dead)
{
int ret;
@ -359,7 +368,7 @@ int fscache_wait_for_operation_activation(struct fscache_object *object,
fscache_stat(stat_op_waits);
if (wait_on_bit(&op->flags, FSCACHE_OP_WAITING,
TASK_INTERRUPTIBLE) != 0) {
ret = fscache_cancel_op(op, do_cancel);
ret = fscache_cancel_op(op, false);
if (ret == 0)
return -ERESTARTSYS;
@ -377,11 +386,13 @@ check_if_dead:
_leave(" = -ENOBUFS [cancelled]");
return -ENOBUFS;
}
if (unlikely(fscache_object_is_dead(object))) {
pr_err("%s() = -ENOBUFS [obj dead %d]\n", __func__, op->state);
fscache_cancel_op(op, do_cancel);
if (unlikely(fscache_object_is_dying(object) ||
fscache_cache_is_broken(object))) {
enum fscache_operation_state state = op->state;
fscache_cancel_op(op, true);
if (stat_object_dead)
fscache_stat(stat_object_dead);
_leave(" = -ENOBUFS [obj dead %d]", state);
return -ENOBUFS;
}
return 0;
@ -453,17 +464,12 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie,
fscache_stat(&fscache_n_retrieval_ops);
/* pin the netfs read context in case we need to do the actual netfs
* read because we've encountered a cache read failure */
fscache_get_context(object->cookie, op->context);
/* we wait for the operation to become active, and then process it
* *here*, in this thread, and not in the thread pool */
ret = fscache_wait_for_operation_activation(
object, &op->op,
__fscache_stat(&fscache_n_retrieval_op_waits),
__fscache_stat(&fscache_n_retrievals_object_dead),
fscache_do_cancel_retrieval);
__fscache_stat(&fscache_n_retrievals_object_dead));
if (ret < 0)
goto error;
@ -503,7 +509,7 @@ nobufs_unlock:
spin_unlock(&cookie->lock);
if (wake_cookie)
__fscache_wake_unused_cookie(cookie);
kfree(op);
fscache_put_retrieval(op);
nobufs:
fscache_stat(&fscache_n_retrievals_nobufs);
_leave(" = -ENOBUFS");
@ -584,17 +590,12 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie,
fscache_stat(&fscache_n_retrieval_ops);
/* pin the netfs read context in case we need to do the actual netfs
* read because we've encountered a cache read failure */
fscache_get_context(object->cookie, op->context);
/* we wait for the operation to become active, and then process it
* *here*, in this thread, and not in the thread pool */
ret = fscache_wait_for_operation_activation(
object, &op->op,
__fscache_stat(&fscache_n_retrieval_op_waits),
__fscache_stat(&fscache_n_retrievals_object_dead),
fscache_do_cancel_retrieval);
__fscache_stat(&fscache_n_retrievals_object_dead));
if (ret < 0)
goto error;
@ -632,7 +633,7 @@ nobufs_unlock_dec:
wake_cookie = __fscache_unuse_cookie(cookie);
nobufs_unlock:
spin_unlock(&cookie->lock);
kfree(op);
fscache_put_retrieval(op);
if (wake_cookie)
__fscache_wake_unused_cookie(cookie);
nobufs:
@ -700,8 +701,7 @@ int __fscache_alloc_page(struct fscache_cookie *cookie,
ret = fscache_wait_for_operation_activation(
object, &op->op,
__fscache_stat(&fscache_n_alloc_op_waits),
__fscache_stat(&fscache_n_allocs_object_dead),
fscache_do_cancel_retrieval);
__fscache_stat(&fscache_n_allocs_object_dead));
if (ret < 0)
goto error;
@ -726,7 +726,7 @@ nobufs_unlock_dec:
wake_cookie = __fscache_unuse_cookie(cookie);
nobufs_unlock:
spin_unlock(&cookie->lock);
kfree(op);
fscache_put_retrieval(op);
if (wake_cookie)
__fscache_wake_unused_cookie(cookie);
nobufs:
@ -944,7 +944,7 @@ int __fscache_write_page(struct fscache_cookie *cookie,
if (!op)
goto nomem;
fscache_operation_init(&op->op, fscache_write_op,
fscache_operation_init(&op->op, fscache_write_op, NULL,
fscache_release_write_op);
op->op.flags = FSCACHE_OP_ASYNC |
(1 << FSCACHE_OP_WAITING) |
@ -1016,7 +1016,7 @@ already_pending:
spin_unlock(&object->lock);
spin_unlock(&cookie->lock);
radix_tree_preload_end();
kfree(op);
fscache_put_operation(&op->op);
fscache_stat(&fscache_n_stores_ok);
_leave(" = 0");
return 0;
@ -1036,7 +1036,7 @@ nobufs_unlock_obj:
nobufs:
spin_unlock(&cookie->lock);
radix_tree_preload_end();
kfree(op);
fscache_put_operation(&op->op);
if (wake_cookie)
__fscache_wake_unused_cookie(cookie);
fscache_stat(&fscache_n_stores_nobufs);
@ -1044,7 +1044,7 @@ nobufs:
return -ENOBUFS;
nomem_free:
kfree(op);
fscache_put_operation(&op->op);
nomem:
fscache_stat(&fscache_n_stores_oom);
_leave(" = -ENOMEM");

14
fs/fscache/stats.c
View File

@ -23,6 +23,7 @@ atomic_t fscache_n_op_run;
atomic_t fscache_n_op_enqueue;
atomic_t fscache_n_op_requeue;
atomic_t fscache_n_op_deferred_release;
atomic_t fscache_n_op_initialised;
atomic_t fscache_n_op_release;
atomic_t fscache_n_op_gc;
atomic_t fscache_n_op_cancelled;
@ -130,6 +131,11 @@ atomic_t fscache_n_cop_write_page;
atomic_t fscache_n_cop_uncache_page;
atomic_t fscache_n_cop_dissociate_pages;
atomic_t fscache_n_cache_no_space_reject;
atomic_t fscache_n_cache_stale_objects;
atomic_t fscache_n_cache_retired_objects;
atomic_t fscache_n_cache_culled_objects;
/*
* display the general statistics
*/
@ -246,7 +252,8 @@ static int fscache_stats_show(struct seq_file *m, void *v)
atomic_read(&fscache_n_op_enqueue),
atomic_read(&fscache_n_op_cancelled),
atomic_read(&fscache_n_op_rejected));
seq_printf(m, "Ops : dfr=%u rel=%u gc=%u\n",
seq_printf(m, "Ops : ini=%u dfr=%u rel=%u gc=%u\n",
atomic_read(&fscache_n_op_initialised),
atomic_read(&fscache_n_op_deferred_release),
atomic_read(&fscache_n_op_release),
atomic_read(&fscache_n_op_gc));
@ -271,6 +278,11 @@ static int fscache_stats_show(struct seq_file *m, void *v)
atomic_read(&fscache_n_cop_write_page),
atomic_read(&fscache_n_cop_uncache_page),
atomic_read(&fscache_n_cop_dissociate_pages));
seq_printf(m, "CacheEv: nsp=%d stl=%d rtr=%d cul=%d\n",
atomic_read(&fscache_n_cache_no_space_reject),
atomic_read(&fscache_n_cache_stale_objects),
atomic_read(&fscache_n_cache_retired_objects),
atomic_read(&fscache_n_cache_culled_objects));
return 0;
}

2
fs/fuse/file.c
View File

@ -1169,7 +1169,7 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (err <= 0)
goto out;
err = file_remove_suid(file);
err = file_remove_privs(file);
if (err)
goto out;

2
fs/hfs/hfs_fs.h
View File

@ -252,7 +252,7 @@ extern void hfs_mark_mdb_dirty(struct super_block *sb);
#define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60)
#define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60)
#define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode))
#define HFS_I(inode) (container_of(inode, struct hfs_inode_info, vfs_inode))
#define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info)
#define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) }

2
fs/hfsplus/hfsplus_fs.h
View File

@ -263,7 +263,7 @@ struct hfsplus_inode_info {
static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
{
return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
return container_of(inode, struct hfsplus_inode_info, vfs_inode);
}
/*

2
fs/hpfs/hpfs_fn.h
View File

@ -304,7 +304,7 @@ extern const struct address_space_operations hpfs_symlink_aops;
static inline struct hpfs_inode_info *hpfs_i(struct inode *inode)
{
return list_entry(inode, struct hpfs_inode_info, vfs_inode);
return container_of(inode, struct hpfs_inode_info, vfs_inode);
}
static inline struct hpfs_sb_info *hpfs_sb(struct super_block *sb)

66
fs/inode.c
View File

@ -841,7 +841,11 @@ unsigned int get_next_ino(void)
}
#endif
*p = ++res;
res++;
/* get_next_ino should not provide a 0 inode number */
if (unlikely(!res))
res++;
*p = res;
put_cpu_var(last_ino);
return res;
}
@ -1674,7 +1678,31 @@ int should_remove_suid(struct dentry *dentry)
}
EXPORT_SYMBOL(should_remove_suid);
static int __remove_suid(struct dentry *dentry, int kill)
/*
* Return mask of changes for notify_change() that need to be done as a
* response to write or truncate. Return 0 if nothing has to be changed.
* Negative value on error (change should be denied).
*/
int dentry_needs_remove_privs(struct dentry *dentry)
{
struct inode *inode = d_inode(dentry);
int mask = 0;
int ret;
if (IS_NOSEC(inode))
return 0;
mask = should_remove_suid(dentry);
ret = security_inode_need_killpriv(dentry);
if (ret < 0)
return ret;
if (ret)
mask |= ATTR_KILL_PRIV;
return mask;
}
EXPORT_SYMBOL(dentry_needs_remove_privs);
static int __remove_privs(struct dentry *dentry, int kill)
{
struct iattr newattrs;
@ -1686,33 +1714,32 @@ static int __remove_suid(struct dentry *dentry, int kill)
return notify_change(dentry, &newattrs, NULL);
}
int file_remove_suid(struct file *file)
/*
* Remove special file priviledges (suid, capabilities) when file is written
* to or truncated.
*/
int file_remove_privs(struct file *file)
{
struct dentry *dentry = file->f_path.dentry;
struct inode *inode = d_inode(dentry);
int killsuid;
int killpriv;
int kill;
int error = 0;
/* Fast path for nothing security related */
if (IS_NOSEC(inode))
return 0;
killsuid = should_remove_suid(dentry);
killpriv = security_inode_need_killpriv(dentry);
if (killpriv < 0)
return killpriv;
if (killpriv)
error = security_inode_killpriv(dentry);
if (!error && killsuid)
error = __remove_suid(dentry, killsuid);
if (!error && (inode->i_sb->s_flags & MS_NOSEC))
inode->i_flags |= S_NOSEC;
kill = file_needs_remove_privs(file);
if (kill < 0)
return kill;
if (kill)
error = __remove_privs(dentry, kill);
if (!error)
inode_has_no_xattr(inode);
return error;
}
EXPORT_SYMBOL(file_remove_suid);
EXPORT_SYMBOL(file_remove_privs);
/**
* file_update_time - update mtime and ctime time
@ -1967,9 +1994,8 @@ EXPORT_SYMBOL(inode_dio_wait);
* inode is being instantiated). The reason for the cmpxchg() loop
* --- which wouldn't be necessary if all code paths which modify
* i_flags actually followed this rule, is that there is at least one
* code path which doesn't today --- for example,
* __generic_file_aio_write() calls file_remove_suid() without holding
* i_mutex --- so we use cmpxchg() out of an abundance of caution.
* code path which doesn't today so we use cmpxchg() out of an abundance
* of caution.
*
* In the long run, i_mutex is overkill, and we should probably look
* at using the i_lock spinlock to protect i_flags, and then make sure

1
fs/internal.h
View File

@ -107,6 +107,7 @@ extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
extern long do_handle_open(int mountdirfd,
struct file_handle __user *ufh, int open_flag);
extern int open_check_o_direct(struct file *f);
extern int vfs_open(const struct path *, struct file *, const struct cred *);
/*
* inode.c

2
fs/jffs2/os-linux.h
View File

@ -19,7 +19,7 @@
struct kstatfs;
struct kvec;
#define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
#define JFFS2_INODE_INFO(i) (container_of(i, struct jffs2_inode_info, vfs_inode))
#define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode)
#define JFFS2_SB_INFO(sb) (sb->s_fs_info)
#define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv)

2
fs/jfs/jfs_incore.h
View File

@ -206,7 +206,7 @@ struct jfs_sb_info {
static inline struct jfs_inode_info *JFS_IP(struct inode *inode)
{
return list_entry(inode, struct jfs_inode_info, vfs_inode);
return container_of(inode, struct jfs_inode_info, vfs_inode);
}
static inline int jfs_dirtable_inline(struct inode *inode)

5
fs/libfs.c
View File

@ -20,11 +20,6 @@
#include "internal.h"
static inline int simple_positive(struct dentry *dentry)
{
return d_really_is_positive(dentry) && !d_unhashed(dentry);
}
int simple_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{

5
fs/minix/dir.c
View File

@ -45,11 +45,6 @@ minix_last_byte(struct inode *inode, unsigned long page_nr)
return last_byte;
}
static inline unsigned long dir_pages(struct inode *inode)
{
return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
}
static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)
{
struct address_space *mapping = page->mapping;

2
fs/minix/minix.h
View File

@ -84,7 +84,7 @@ static inline struct minix_sb_info *minix_sb(struct super_block *sb)
static inline struct minix_inode_info *minix_i(struct inode *inode)
{
return list_entry(inode, struct minix_inode_info, vfs_inode);
return container_of(inode, struct minix_inode_info, vfs_inode);
}
static inline unsigned minix_blocks_needed(unsigned bits, unsigned blocksize)

6
fs/namei.c
View File

@ -792,7 +792,7 @@ static void set_root(struct nameidata *nd)
get_fs_root(current->fs, &nd->root);
}
static unsigned set_root_rcu(struct nameidata *nd)
static void set_root_rcu(struct nameidata *nd)
{
struct fs_struct *fs = current->fs;
unsigned seq;
@ -802,7 +802,6 @@ static unsigned set_root_rcu(struct nameidata *nd)
nd->root = fs->root;
nd->root_seq = __read_seqcount_begin(&nd->root.dentry->d_seq);
} while (read_seqcount_retry(&fs->seq, seq));
return nd->root_seq;
}
static void path_put_conditional(struct path *path, struct nameidata *nd)
@ -1998,7 +1997,8 @@ static const char *path_init(struct nameidata *nd, unsigned flags)
if (*s == '/') {
if (flags & LOOKUP_RCU) {
rcu_read_lock();
nd->seq = set_root_rcu(nd);
set_root_rcu(nd);
nd->seq = nd->root_seq;
} else {
set_root(nd);
path_get(&nd->root);

2
fs/ncpfs/dir.c
View File

@ -1145,6 +1145,8 @@ static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry,
case 0x00:
ncp_dbg(1, "renamed %pd -> %pd\n",
old_dentry, new_dentry);
ncp_d_prune(old_dentry);
ncp_d_prune(new_dentry);
break;
case 0x9E:
error = -ENAMETOOLONG;

2
fs/nfs/dir.c
View File

@ -1768,7 +1768,7 @@ EXPORT_SYMBOL_GPL(nfs_mkdir);
static void nfs_dentry_handle_enoent(struct dentry *dentry)
{
if (d_really_is_positive(dentry) && !d_unhashed(dentry))
if (simple_positive(dentry))
d_delete(dentry);
}

5
fs/nilfs2/dir.c
View File

@ -61,11 +61,6 @@ static inline void nilfs_put_page(struct page *page)
page_cache_release(page);
}
static inline unsigned long dir_pages(struct inode *inode)
{
return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
}
/*
* Return the offset into page `page_nr' of the last valid
* byte in that page, plus one.

22
fs/nilfs2/inode.c
View File

@ -307,31 +307,13 @@ static int nilfs_write_end(struct file *file, struct address_space *mapping,
static ssize_t
nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = file->f_mapping->host;
size_t count = iov_iter_count(iter);
ssize_t size;
struct inode *inode = file_inode(iocb->ki_filp);
if (iov_iter_rw(iter) == WRITE)
return 0;
/* Needs synchronization with the cleaner */
size = blockdev_direct_IO(iocb, inode, iter, offset, nilfs_get_block);
/*
* In case of error extending write may have instantiated a few
* blocks outside i_size. Trim these off again.
*/
if (unlikely(iov_iter_rw(iter) == WRITE && size < 0)) {
loff_t isize = i_size_read(inode);
loff_t end = offset + count;
if (end > isize)
nilfs_write_failed(mapping, end);
}
return size;
return blockdev_direct_IO(iocb, inode, iter, offset, nilfs_get_block);
}
const struct address_space_operations nilfs_aops = {

2
fs/ntfs/file.c
View File

@ -382,7 +382,7 @@ static ssize_t ntfs_prepare_file_for_write(struct kiocb *iocb,
base_ni = ni;
if (NInoAttr(ni))
base_ni = ni->ext.base_ntfs_ino;
err = file_remove_suid(file);
err = file_remove_privs(file);
if (unlikely(err))
goto out;
/*

2
fs/ntfs/inode.h
View File

@ -239,7 +239,7 @@ typedef struct {
*/
static inline ntfs_inode *NTFS_I(struct inode *inode)
{
return (ntfs_inode *)list_entry(inode, big_ntfs_inode, vfs_inode);
return (ntfs_inode *)container_of(inode, big_ntfs_inode, vfs_inode);
}
static inline struct inode *VFS_I(ntfs_inode *ni)

61
fs/open.c
View File

@ -51,8 +51,10 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
newattrs.ia_valid |= ATTR_FILE;
}
/* Remove suid/sgid on truncate too */
ret = should_remove_suid(dentry);
/* Remove suid, sgid, and file capabilities on truncate too */
ret = dentry_needs_remove_privs(dentry);
if (ret < 0)
return ret;
if (ret)
newattrs.ia_valid |= ret | ATTR_FORCE;
@ -678,18 +680,18 @@ int open_check_o_direct(struct file *f)
}
static int do_dentry_open(struct file *f,
struct inode *inode,
int (*open)(struct inode *, struct file *),
const struct cred *cred)
{
static const struct file_operations empty_fops = {};
struct inode *inode;
int error;
f->f_mode = OPEN_FMODE(f->f_flags) | FMODE_LSEEK |
FMODE_PREAD | FMODE_PWRITE;
path_get(&f->f_path);
inode = f->f_inode = f->f_path.dentry->d_inode;
f->f_inode = inode;
f->f_mapping = inode->i_mapping;
if (unlikely(f->f_flags & O_PATH)) {
@ -793,7 +795,8 @@ int finish_open(struct file *file, struct dentry *dentry,
BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
file->f_path.dentry = dentry;
error = do_dentry_open(file, open, current_cred());
error = do_dentry_open(file, d_backing_inode(dentry), open,
current_cred());
if (!error)
*opened |= FILE_OPENED;
@ -822,6 +825,34 @@ int finish_no_open(struct file *file, struct dentry *dentry)
}
EXPORT_SYMBOL(finish_no_open);
char *file_path(struct file *filp, char *buf, int buflen)
{
return d_path(&filp->f_path, buf, buflen);
}
EXPORT_SYMBOL(file_path);
/**
* vfs_open - open the file at the given path
* @path: path to open
* @file: newly allocated file with f_flag initialized
* @cred: credentials to use
*/
int vfs_open(const struct path *path, struct file *file,
const struct cred *cred)
{
struct dentry *dentry = path->dentry;
struct inode *inode = dentry->d_inode;
file->f_path = *path;
if (dentry->d_flags & DCACHE_OP_SELECT_INODE) {
inode = dentry->d_op->d_select_inode(dentry, file->f_flags);
if (IS_ERR(inode))
return PTR_ERR(inode);
}
return do_dentry_open(file, inode, NULL, cred);
}
struct file *dentry_open(const struct path *path, int flags,
const struct cred *cred)
{
@ -853,26 +884,6 @@ struct file *dentry_open(const struct path *path, int flags,
}
EXPORT_SYMBOL(dentry_open);
/**
* vfs_open - open the file at the given path
* @path: path to open
* @filp: newly allocated file with f_flag initialized
* @cred: credentials to use
*/
int vfs_open(const struct path *path, struct file *filp,
const struct cred *cred)
{
struct inode *inode = path->dentry->d_inode;
if (inode->i_op->dentry_open)
return inode->i_op->dentry_open(path->dentry, filp, cred);
else {
filp->f_path = *path;
return do_dentry_open(filp, NULL, cred);
}
}
EXPORT_SYMBOL(vfs_open);
static inline int build_open_flags(int flags, umode_t mode, struct open_flags *op)
{
int lookup_flags = 0;

22
fs/overlayfs/inode.c
View File

@ -337,37 +337,30 @@ static bool ovl_open_need_copy_up(int flags, enum ovl_path_type type,
return true;
}
static int ovl_dentry_open(struct dentry *dentry, struct file *file,
const struct cred *cred)
struct inode *ovl_d_select_inode(struct dentry *dentry, unsigned file_flags)
{
int err;
struct path realpath;
enum ovl_path_type type;
bool want_write = false;
type = ovl_path_real(dentry, &realpath);
if (ovl_open_need_copy_up(file->f_flags, type, realpath.dentry)) {
want_write = true;
if (ovl_open_need_copy_up(file_flags, type, realpath.dentry)) {
err = ovl_want_write(dentry);
if (err)
goto out;
return ERR_PTR(err);
if (file->f_flags & O_TRUNC)
if (file_flags & O_TRUNC)
err = ovl_copy_up_last(dentry, NULL, true);
else
err = ovl_copy_up(dentry);
ovl_drop_write(dentry);
if (err)
goto out_drop_write;
return ERR_PTR(err);
ovl_path_upper(dentry, &realpath);
}
err = vfs_open(&realpath, file, cred);
out_drop_write:
if (want_write)
ovl_drop_write(dentry);
out:
return err;
return d_backing_inode(realpath.dentry);
}
static const struct inode_operations ovl_file_inode_operations = {
@ -378,7 +371,6 @@ static const struct inode_operations ovl_file_inode_operations = {
.getxattr = ovl_getxattr,
.listxattr = ovl_listxattr,
.removexattr = ovl_removexattr,
.dentry_open = ovl_dentry_open,
};
static const struct inode_operations ovl_symlink_inode_operations = {

1
fs/overlayfs/overlayfs.h
View File

@ -173,6 +173,7 @@ ssize_t ovl_getxattr(struct dentry *dentry, const char *name,
void *value, size_t size);
ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
int ovl_removexattr(struct dentry *dentry, const char *name);
struct inode *ovl_d_select_inode(struct dentry *dentry, unsigned file_flags);
struct inode *ovl_new_inode(struct super_block *sb, umode_t mode,
struct ovl_entry *oe);

1
fs/overlayfs/super.c
View File

@ -316,6 +316,7 @@ static int ovl_dentry_weak_revalidate(struct dentry *dentry, unsigned int flags)
static const struct dentry_operations ovl_dentry_operations = {
.d_release = ovl_dentry_release,
.d_select_inode = ovl_d_select_inode,
};
static const struct dentry_operations ovl_reval_dentry_operations = {

46
fs/posix_acl.c
View File

@ -547,51 +547,45 @@ posix_acl_create(struct inode *dir, umode_t *mode,
struct posix_acl **default_acl, struct posix_acl **acl)
{
struct posix_acl *p;
struct posix_acl *clone;
int ret;
*acl = NULL;
*default_acl = NULL;
if (S_ISLNK(*mode) || !IS_POSIXACL(dir))
goto no_acl;
return 0;
p = get_acl(dir, ACL_TYPE_DEFAULT);
if (IS_ERR(p)) {
if (p == ERR_PTR(-EOPNOTSUPP))
goto apply_umask;
return PTR_ERR(p);
if (!p || p == ERR_PTR(-EOPNOTSUPP)) {
*mode &= ~current_umask();
return 0;
}
if (IS_ERR(p))
return PTR_ERR(p);
if (!p)
goto apply_umask;
*acl = posix_acl_clone(p, GFP_NOFS);
if (!*acl)
clone = posix_acl_clone(p, GFP_NOFS);
if (!clone)
goto no_mem;
ret = posix_acl_create_masq(*acl, mode);
ret = posix_acl_create_masq(clone, mode);
if (ret < 0)
goto no_mem_clone;
if (ret == 0) {
posix_acl_release(*acl);
*acl = NULL;
}
if (ret == 0)
posix_acl_release(clone);
else
*acl = clone;
if (!S_ISDIR(*mode)) {
if (!S_ISDIR(*mode))
posix_acl_release(p);
*default_acl = NULL;
} else {
else
*default_acl = p;
}
return 0;
apply_umask:
*mode &= ~current_umask();
no_acl:
*default_acl = NULL;
*acl = NULL;
return 0;
no_mem_clone:
posix_acl_release(*acl);
posix_acl_release(clone);
no_mem:
posix_acl_release(p);
return -ENOMEM;

2
fs/proc/nommu.c
View File

@ -64,7 +64,7 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region)
if (file) {
seq_pad(m, ' ');
seq_path(m, &file->f_path, "");
seq_file_path(m, file, "");
}
seq_putc(m, '\n');

4
fs/proc/task_mmu.c
View File

@ -310,7 +310,7 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
*/
if (file) {
seq_pad(m, ' ');
seq_path(m, &file->f_path, "\n");
seq_file_path(m, file, "\n");
goto done;
}
@ -1509,7 +1509,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
if (file) {
seq_puts(m, " file=");
seq_path(m, &file->f_path, "\n\t= ");
seq_file_path(m, file, "\n\t= ");
} else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) {
seq_puts(m, " heap");
} else {

2
fs/proc/task_nommu.c
View File

@ -180,7 +180,7 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
if (file) {
seq_pad(m, ' ');
seq_path(m, &file->f_path, "");
seq_file_path(m, file, "");
} else if (mm) {
pid_t tid = pid_of_stack(priv, vma, is_pid);

5
fs/qnx6/dir.c
View File

@ -32,11 +32,6 @@ static struct page *qnx6_get_page(struct inode *dir, unsigned long n)
return page;
}
static inline unsigned long dir_pages(struct inode *inode)
{
return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
}
static unsigned last_entry(struct inode *inode, unsigned long page_nr)
{
unsigned long last_byte = inode->i_size;

14
fs/seq_file.c
View File

@ -490,6 +490,20 @@ int seq_path(struct seq_file *m, const struct path *path, const char *esc)
}
EXPORT_SYMBOL(seq_path);
/**
* seq_file_path - seq_file interface to print a pathname of a file
* @m: the seq_file handle
* @file: the struct file to print
* @esc: set of characters to escape in the output
*
* return the absolute path to the file.
*/
int seq_file_path(struct seq_file *m, struct file *file, const char *esc)
{
return seq_path(m, &file->f_path, esc);
}
EXPORT_SYMBOL(seq_file_path);
/*
* Same as seq_path, but relative to supplied root.
*/

2
fs/squashfs/squashfs_fs_i.h
View File

@ -49,6 +49,6 @@ struct squashfs_inode_info {
static inline struct squashfs_inode_info *squashfs_i(struct inode *inode)
{
return list_entry(inode, struct squashfs_inode_info, vfs_inode);
return container_of(inode, struct squashfs_inode_info, vfs_inode);
}
#endif

2
fs/super.c
View File

@ -842,7 +842,7 @@ int get_anon_bdev(dev_t *p)
else if (error)
return -EAGAIN;
if (dev == (1 << MINORBITS)) {
if (dev >= (1 << MINORBITS)) {
spin_lock(&unnamed_dev_lock);
ida_remove(&unnamed_dev_ida, dev);
if (unnamed_dev_start > dev)

5
fs/sysv/dir.c
View File

@ -33,11 +33,6 @@ static inline void dir_put_page(struct page *page)
page_cache_release(page);
}
static inline unsigned long dir_pages(struct inode *inode)
{
return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
}
static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)
{
struct address_space *mapping = page->mapping;

2
fs/sysv/sysv.h
View File

@ -73,7 +73,7 @@ struct sysv_inode_info {
static inline struct sysv_inode_info *SYSV_I(struct inode *inode)
{
return list_entry(inode, struct sysv_inode_info, vfs_inode);
return container_of(inode, struct sysv_inode_info, vfs_inode);
}
static inline struct sysv_sb_info *SYSV_SB(struct super_block *sb)

11
fs/tracefs/inode.c
View File

@ -496,16 +496,11 @@ struct dentry *tracefs_create_instance_dir(const char *name, struct dentry *pare
return dentry;
}
static inline int tracefs_positive(struct dentry *dentry)
{
return dentry->d_inode && !d_unhashed(dentry);
}
static int __tracefs_remove(struct dentry *dentry, struct dentry *parent)
{
int ret = 0;
if (tracefs_positive(dentry)) {
if (simple_positive(dentry)) {
if (dentry->d_inode) {
dget(dentry);
switch (dentry->d_inode->i_mode & S_IFMT) {
@ -582,7 +577,7 @@ void tracefs_remove_recursive(struct dentry *dentry)
*/
spin_lock(&parent->d_lock);
list_for_each_entry(child, &parent->d_subdirs, d_child) {
if (!tracefs_positive(child))
if (!simple_positive(child))
continue;
/* perhaps simple_empty(child) makes more sense */
@ -603,7 +598,7 @@ void tracefs_remove_recursive(struct dentry *dentry)
* from d_subdirs. When releasing the parent->d_lock we can
* no longer trust that the next pointer is valid.
* Restart the loop. We'll skip this one with the
* tracefs_positive() check.
* simple_positive() check.
*/
goto loop;
}

2
fs/udf/udf_i.h
View File

@ -56,7 +56,7 @@ struct udf_inode_info {
static inline struct udf_inode_info *UDF_I(struct inode *inode)
{
return list_entry(inode, struct udf_inode_info, vfs_inode);
return container_of(inode, struct udf_inode_info, vfs_inode);
}
#endif /* _UDF_I_H) */

34
fs/ufs/balloc.c
View File

@ -51,8 +51,8 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
if (ufs_fragnum(fragment) + count > uspi->s_fpg)
ufs_error (sb, "ufs_free_fragments", "internal error");
lock_ufs(sb);
mutex_lock(&UFS_SB(sb)->s_lock);
cgno = ufs_dtog(uspi, fragment);
bit = ufs_dtogd(uspi, fragment);
@ -115,13 +115,13 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
if (sb->s_flags & MS_SYNCHRONOUS)
ubh_sync_block(UCPI_UBH(ucpi));
ufs_mark_sb_dirty(sb);
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT\n");
return;
failed:
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT (FAILED)\n");
return;
}
@ -151,7 +151,7 @@ void ufs_free_blocks(struct inode *inode, u64 fragment, unsigned count)
goto failed;
}
lock_ufs(sb);
mutex_lock(&UFS_SB(sb)->s_lock);
do_more:
overflow = 0;
@ -211,12 +211,12 @@ do_more:
}
ufs_mark_sb_dirty(sb);
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT\n");
return;
failed_unlock:
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
failed:
UFSD("EXIT (FAILED)\n");
return;
@ -357,7 +357,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
usb1 = ubh_get_usb_first(uspi);
*err = -ENOSPC;
lock_ufs(sb);
mutex_lock(&UFS_SB(sb)->s_lock);
tmp = ufs_data_ptr_to_cpu(sb, p);
if (count + ufs_fragnum(fragment) > uspi->s_fpb) {
@ -378,19 +378,19 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
"fragment %llu, tmp %llu\n",
(unsigned long long)fragment,
(unsigned long long)tmp);
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
return INVBLOCK;
}
if (fragment < UFS_I(inode)->i_lastfrag) {
UFSD("EXIT (ALREADY ALLOCATED)\n");
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
return 0;
}
}
else {
if (tmp) {
UFSD("EXIT (ALREADY ALLOCATED)\n");
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
return 0;
}
}
@ -399,7 +399,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
* There is not enough space for user on the device
*/
if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) {
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT (FAILED)\n");
return 0;
}
@ -424,7 +424,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
ufs_clear_frags(inode, result + oldcount,
newcount - oldcount, locked_page != NULL);
}
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
@ -439,7 +439,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
fragment + count);
ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
locked_page != NULL);
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
@ -477,7 +477,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
*err = 0;
UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag,
fragment + count);
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
if (newcount < request)
ufs_free_fragments (inode, result + newcount, request - newcount);
ufs_free_fragments (inode, tmp, oldcount);
@ -485,7 +485,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
return result;
}
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT (FAILED)\n");
return 0;
}

19
fs/ufs/dir.c
View File

@ -65,11 +65,6 @@ static inline void ufs_put_page(struct page *page)
page_cache_release(page);
}
static inline unsigned long ufs_dir_pages(struct inode *inode)
{
return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
}
ino_t ufs_inode_by_name(struct inode *dir, const struct qstr *qstr)
{
ino_t res = 0;
@ -87,7 +82,8 @@ ino_t ufs_inode_by_name(struct inode *dir, const struct qstr *qstr)
/* Releases the page */
void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
struct page *page, struct inode *inode)
struct page *page, struct inode *inode,
bool update_times)
{
loff_t pos = page_offset(page) +
(char *) de - (char *) page_address(page);
@ -103,7 +99,8 @@ void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
err = ufs_commit_chunk(page, pos, len);
ufs_put_page(page);
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
if (update_times)
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
}
@ -256,7 +253,7 @@ struct ufs_dir_entry *ufs_find_entry(struct inode *dir, const struct qstr *qstr,
int namelen = qstr->len;
unsigned reclen = UFS_DIR_REC_LEN(namelen);
unsigned long start, n;
unsigned long npages = ufs_dir_pages(dir);
unsigned long npages = dir_pages(dir);
struct page *page = NULL;
struct ufs_inode_info *ui = UFS_I(dir);
struct ufs_dir_entry *de;
@ -320,7 +317,7 @@ int ufs_add_link(struct dentry *dentry, struct inode *inode)
unsigned short rec_len, name_len;
struct page *page = NULL;
struct ufs_dir_entry *de;
unsigned long npages = ufs_dir_pages(dir);
unsigned long npages = dir_pages(dir);
unsigned long n;
char *kaddr;
loff_t pos;
@ -437,7 +434,7 @@ ufs_readdir(struct file *file, struct dir_context *ctx)
struct super_block *sb = inode->i_sb;
unsigned int offset = pos & ~PAGE_CACHE_MASK;
unsigned long n = pos >> PAGE_CACHE_SHIFT;
unsigned long npages = ufs_dir_pages(inode);
unsigned long npages = dir_pages(inode);
unsigned chunk_mask = ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1);
int need_revalidate = file->f_version != inode->i_version;
unsigned flags = UFS_SB(sb)->s_flags;
@ -608,7 +605,7 @@ int ufs_empty_dir(struct inode * inode)
{
struct super_block *sb = inode->i_sb;
struct page *page = NULL;
unsigned long i, npages = ufs_dir_pages(inode);
unsigned long i, npages = dir_pages(inode);
for (i = 0; i < npages; i++) {
char *kaddr;

16
fs/ufs/ialloc.c
View File

@ -69,11 +69,11 @@ void ufs_free_inode (struct inode * inode)
ino = inode->i_ino;
lock_ufs(sb);
mutex_lock(&UFS_SB(sb)->s_lock);
if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) {
ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino);
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
return;
}
@ -81,7 +81,7 @@ void ufs_free_inode (struct inode * inode)
bit = ufs_inotocgoff (ino);
ucpi = ufs_load_cylinder (sb, cg);
if (!ucpi) {
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
return;
}
ucg = ubh_get_ucg(UCPI_UBH(ucpi));
@ -115,7 +115,7 @@ void ufs_free_inode (struct inode * inode)
ubh_sync_block(UCPI_UBH(ucpi));
ufs_mark_sb_dirty(sb);
unlock_ufs(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT\n");
}
@ -193,7 +193,7 @@ struct inode *ufs_new_inode(struct inode *dir, umode_t mode)
sbi = UFS_SB(sb);
uspi = sbi->s_uspi;
lock_ufs(sb);
mutex_lock(&sbi->s_lock);
/*
* Try to place the inode in its parent directory
@ -331,21 +331,21 @@ cg_found:
sync_dirty_buffer(bh);
brelse(bh);
}
unlock_ufs(sb);
mutex_unlock(&sbi->s_lock);
UFSD("allocating inode %lu\n", inode->i_ino);
UFSD("EXIT\n");
return inode;
fail_remove_inode:
unlock_ufs(sb);
mutex_unlock(&sbi->s_lock);
clear_nlink(inode);
unlock_new_inode(inode);
iput(inode);
UFSD("EXIT (FAILED): err %d\n", err);
return ERR_PTR(err);
failed:
unlock_ufs(sb);
mutex_unlock(&sbi->s_lock);
make_bad_inode(inode);
iput (inode);
UFSD("EXIT (FAILED): err %d\n", err);

5
fs/ufs/inode.c
View File

@ -903,6 +903,9 @@ void ufs_evict_inode(struct inode * inode)
invalidate_inode_buffers(inode);
clear_inode(inode);
if (want_delete)
if (want_delete) {
lock_ufs(inode->i_sb);
ufs_free_inode(inode);
unlock_ufs(inode->i_sb);
}
}

79
fs/ufs/namei.c
View File

@ -56,11 +56,9 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsi
if (dentry->d_name.len > UFS_MAXNAMLEN)
return ERR_PTR(-ENAMETOOLONG);
lock_ufs(dir->i_sb);
ino = ufs_inode_by_name(dir, &dentry->d_name);
if (ino)
inode = ufs_iget(dir->i_sb, ino);
unlock_ufs(dir->i_sb);
return d_splice_alias(inode, dentry);
}
@ -76,24 +74,16 @@ static int ufs_create (struct inode * dir, struct dentry * dentry, umode_t mode,
bool excl)
{
struct inode *inode;
int err;
UFSD("BEGIN\n");
inode = ufs_new_inode(dir, mode);
err = PTR_ERR(inode);
if (IS_ERR(inode))
return PTR_ERR(inode);
if (!IS_ERR(inode)) {
inode->i_op = &ufs_file_inode_operations;
inode->i_fop = &ufs_file_operations;
inode->i_mapping->a_ops = &ufs_aops;
mark_inode_dirty(inode);
lock_ufs(dir->i_sb);
err = ufs_add_nondir(dentry, inode);
unlock_ufs(dir->i_sb);
}
UFSD("END: err=%d\n", err);
return err;
inode->i_op = &ufs_file_inode_operations;
inode->i_fop = &ufs_file_operations;
inode->i_mapping->a_ops = &ufs_aops;
mark_inode_dirty(inode);
return ufs_add_nondir(dentry, inode);
}
static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
@ -110,9 +100,7 @@ static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev
init_special_inode(inode, mode, rdev);
ufs_set_inode_dev(inode->i_sb, UFS_I(inode), rdev);
mark_inode_dirty(inode);
lock_ufs(dir->i_sb);
err = ufs_add_nondir(dentry, inode);
unlock_ufs(dir->i_sb);
}
return err;
}
@ -121,19 +109,18 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry,
const char * symname)
{
struct super_block * sb = dir->i_sb;
int err = -ENAMETOOLONG;
int err;
unsigned l = strlen(symname)+1;
struct inode * inode;
if (l > sb->s_blocksize)
goto out_notlocked;
return -ENAMETOOLONG;
inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_notlocked;
return err;
lock_ufs(dir->i_sb);
if (l > UFS_SB(sb)->s_uspi->s_maxsymlinklen) {
/* slow symlink */
inode->i_op = &ufs_symlink_inode_operations;
@ -150,17 +137,13 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry,
}
mark_inode_dirty(inode);
err = ufs_add_nondir(dentry, inode);
out:
unlock_ufs(dir->i_sb);
out_notlocked:
return err;
return ufs_add_nondir(dentry, inode);
out_fail:
inode_dec_link_count(inode);
unlock_new_inode(inode);
iput(inode);
goto out;
return err;
}
static int ufs_link (struct dentry * old_dentry, struct inode * dir,
@ -169,14 +152,16 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir,
struct inode *inode = d_inode(old_dentry);
int error;
lock_ufs(dir->i_sb);
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
ihold(inode);
error = ufs_add_nondir(dentry, inode);
unlock_ufs(dir->i_sb);
error = ufs_add_link(dentry, inode);
if (error) {
inode_dec_link_count(inode);
iput(inode);
} else
d_instantiate(dentry, inode);
return error;
}
@ -185,9 +170,12 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
struct inode * inode;
int err;
inode_inc_link_count(dir);
inode = ufs_new_inode(dir, S_IFDIR|mode);
err = PTR_ERR(inode);
if (IS_ERR(inode))
return PTR_ERR(inode);
goto out_dir;
inode->i_op = &ufs_dir_inode_operations;
inode->i_fop = &ufs_dir_operations;
@ -195,9 +183,6 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
inode_inc_link_count(inode);
lock_ufs(dir->i_sb);
inode_inc_link_count(dir);
err = ufs_make_empty(inode, dir);
if (err)
goto out_fail;
@ -205,20 +190,19 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
err = ufs_add_link(dentry, inode);
if (err)
goto out_fail;
unlock_ufs(dir->i_sb);
unlock_new_inode(inode);
d_instantiate(dentry, inode);
out:
return err;
return 0;
out_fail:
inode_dec_link_count(inode);
inode_dec_link_count(inode);
unlock_new_inode(inode);
iput (inode);
out_dir:
inode_dec_link_count(dir);
unlock_ufs(dir->i_sb);
goto out;
return err;
}
static int ufs_unlink(struct inode *dir, struct dentry *dentry)
@ -248,7 +232,6 @@ static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
struct inode * inode = d_inode(dentry);
int err= -ENOTEMPTY;
lock_ufs(dir->i_sb);
if (ufs_empty_dir (inode)) {
err = ufs_unlink(dir, dentry);
if (!err) {
@ -257,7 +240,6 @@ static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
inode_dec_link_count(dir);
}
}
unlock_ufs(dir->i_sb);
return err;
}
@ -295,7 +277,7 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
new_de = ufs_find_entry(new_dir, &new_dentry->d_name, &new_page);
if (!new_de)
goto out_dir;
ufs_set_link(new_dir, new_de, new_page, old_inode);
ufs_set_link(new_dir, new_de, new_page, old_inode, 1);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
drop_nlink(new_inode);
@ -318,7 +300,12 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
mark_inode_dirty(old_inode);
if (dir_de) {
ufs_set_link(old_inode, dir_de, dir_page, new_dir);
if (old_dir != new_dir)
ufs_set_link(old_inode, dir_de, dir_page, new_dir, 0);
else {
kunmap(dir_page);
page_cache_release(dir_page);
}
inode_dec_link_count(old_dir);
}
return 0;

11
fs/ufs/super.c
View File

@ -695,6 +695,7 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
unsigned flags;
lock_ufs(sb);
mutex_lock(&UFS_SB(sb)->s_lock);
UFSD("ENTER\n");
@ -712,6 +713,7 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
ufs_put_cstotal(sb);
UFSD("EXIT\n");
mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return 0;
@ -800,6 +802,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
mutex_init(&sbi->mutex);
mutex_init(&sbi->s_lock);
spin_lock_init(&sbi->work_lock);
INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
/*
@ -1278,6 +1281,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
sync_filesystem(sb);
lock_ufs(sb);
mutex_lock(&UFS_SB(sb)->s_lock);
uspi = UFS_SB(sb)->s_uspi;
flags = UFS_SB(sb)->s_flags;
usb1 = ubh_get_usb_first(uspi);
@ -1291,6 +1295,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
new_mount_opt = 0;
ufs_set_opt (new_mount_opt, ONERROR_LOCK);
if (!ufs_parse_options (data, &new_mount_opt)) {
mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EINVAL;
}
@ -1298,12 +1303,14 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
new_mount_opt |= ufstype;
} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
pr_err("ufstype can't be changed during remount\n");
mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EINVAL;
}
if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
UFS_SB(sb)->s_mount_opt = new_mount_opt;
mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return 0;
}
@ -1327,6 +1334,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
*/
#ifndef CONFIG_UFS_FS_WRITE
pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EINVAL;
#else
@ -1336,11 +1344,13 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
pr_err("this ufstype is read-only supported\n");
mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EINVAL;
}
if (!ufs_read_cylinder_structures(sb)) {
pr_err("failed during remounting\n");
mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EPERM;
}
@ -1348,6 +1358,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
#endif
}
UFS_SB(sb)->s_mount_opt = new_mount_opt;
mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return 0;
}

3
fs/ufs/ufs.h
View File

@ -30,6 +30,7 @@ struct ufs_sb_info {
int work_queued; /* non-zero if the delayed work is queued */
struct delayed_work sync_work; /* FS sync delayed work */
spinlock_t work_lock; /* protects sync_work and work_queued */
struct mutex s_lock;
};
struct ufs_inode_info {
@ -105,7 +106,7 @@ extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page
extern int ufs_empty_dir (struct inode *);
extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
struct page *page, struct inode *inode);
struct page *page, struct inode *inode, bool update_times);
/* file.c */
extern const struct inode_operations ufs_file_inode_operations;

11
fs/xfs/xfs_file.c
View File

@ -577,6 +577,13 @@ restart:
if (error)
return error;
/* For changing security info in file_remove_privs() we need i_mutex */
if (*iolock == XFS_IOLOCK_SHARED && !IS_NOSEC(inode)) {
xfs_rw_iunlock(ip, *iolock);
*iolock = XFS_IOLOCK_EXCL;
xfs_rw_ilock(ip, *iolock);
goto restart;
}
/*
* If the offset is beyond the size of the file, we need to zero any
* blocks that fall between the existing EOF and the start of this
@ -637,7 +644,9 @@ restart:
* setgid bits if the process is not being run by root. This keeps
* people from modifying setuid and setgid binaries.
*/
return file_remove_suid(file);
if (!IS_NOSEC(inode))
return file_remove_privs(file);
return 0;
}
/*

7
include/linux/dcache.h
View File

@ -160,6 +160,7 @@ struct dentry_operations {
char *(*d_dname)(struct dentry *, char *, int);
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(struct dentry *, bool);
struct inode *(*d_select_inode)(struct dentry *, unsigned);
} ____cacheline_aligned;
/*
@ -225,6 +226,7 @@ struct dentry_operations {
#define DCACHE_MAY_FREE 0x00800000
#define DCACHE_FALLTHRU 0x01000000 /* Fall through to lower layer */
#define DCACHE_OP_SELECT_INODE 0x02000000 /* Unioned entry: dcache op selects inode */
extern seqlock_t rename_lock;
@ -505,6 +507,11 @@ static inline bool d_really_is_positive(const struct dentry *dentry)
return dentry->d_inode != NULL;
}
static inline int simple_positive(struct dentry *dentry)
{
return d_really_is_positive(dentry) && !d_unhashed(dentry);
}
extern void d_set_fallthru(struct dentry *dentry);
static inline bool d_is_fallthru(const struct dentry *dentry)

3
include/linux/fdtable.h
View File

@ -47,6 +47,9 @@ struct files_struct {
* read mostly part
*/
atomic_t count;
bool resize_in_progress;
wait_queue_head_t resize_wait;
struct fdtable __rcu *fdt;
struct fdtable fdtab;
/*

11
include/linux/fs.h
View File

@ -1654,7 +1654,6 @@ struct inode_operations {
int (*set_acl)(struct inode *, struct posix_acl *, int);
/* WARNING: probably going away soon, do not use! */
int (*dentry_open)(struct dentry *, struct file *, const struct cred *);
} ____cacheline_aligned;
ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
@ -2213,7 +2212,6 @@ extern struct file *file_open_name(struct filename *, int, umode_t);
extern struct file *filp_open(const char *, int, umode_t);
extern struct file *file_open_root(struct dentry *, struct vfsmount *,
const char *, int);
extern int vfs_open(const struct path *, struct file *, const struct cred *);
extern struct file * dentry_open(const struct path *, int, const struct cred *);
extern int filp_close(struct file *, fl_owner_t id);
@ -2530,6 +2528,8 @@ extern struct file * open_exec(const char *);
extern int is_subdir(struct dentry *, struct dentry *);
extern int path_is_under(struct path *, struct path *);
extern char *file_path(struct file *, char *, int);
#include <linux/err.h>
/* needed for stackable file system support */
@ -2581,7 +2581,12 @@ extern struct inode *new_inode_pseudo(struct super_block *sb);
extern struct inode *new_inode(struct super_block *sb);
extern void free_inode_nonrcu(struct inode *inode);
extern int should_remove_suid(struct dentry *);
extern int file_remove_suid(struct file *);
extern int file_remove_privs(struct file *);
extern int dentry_needs_remove_privs(struct dentry *dentry);
static inline int file_needs_remove_privs(struct file *file)
{
return dentry_needs_remove_privs(file->f_path.dentry);
}
extern void __insert_inode_hash(struct inode *, unsigned long hashval);
static inline void insert_inode_hash(struct inode *inode)

55
include/linux/fscache-cache.h
View File

@ -74,6 +74,7 @@ extern wait_queue_head_t fscache_cache_cleared_wq;
*/
typedef void (*fscache_operation_release_t)(struct fscache_operation *op);
typedef void (*fscache_operation_processor_t)(struct fscache_operation *op);
typedef void (*fscache_operation_cancel_t)(struct fscache_operation *op);
enum fscache_operation_state {
FSCACHE_OP_ST_BLANK, /* Op is not yet submitted */
@ -109,6 +110,9 @@ struct fscache_operation {
* the op in a non-pool thread */
fscache_operation_processor_t processor;
/* Operation cancellation cleanup (optional) */
fscache_operation_cancel_t cancel;
/* operation releaser */
fscache_operation_release_t release;
};
@ -119,33 +123,17 @@ extern void fscache_op_work_func(struct work_struct *work);
extern void fscache_enqueue_operation(struct fscache_operation *);
extern void fscache_op_complete(struct fscache_operation *, bool);
extern void fscache_put_operation(struct fscache_operation *);
/**
* fscache_operation_init - Do basic initialisation of an operation
* @op: The operation to initialise
* @release: The release function to assign
*
* Do basic initialisation of an operation. The caller must still set flags,
* object and processor if needed.
*/
static inline void fscache_operation_init(struct fscache_operation *op,
fscache_operation_processor_t processor,
fscache_operation_release_t release)
{
INIT_WORK(&op->work, fscache_op_work_func);
atomic_set(&op->usage, 1);
op->state = FSCACHE_OP_ST_INITIALISED;
op->debug_id = atomic_inc_return(&fscache_op_debug_id);
op->processor = processor;
op->release = release;
INIT_LIST_HEAD(&op->pend_link);
}
extern void fscache_operation_init(struct fscache_operation *,
fscache_operation_processor_t,
fscache_operation_cancel_t,
fscache_operation_release_t);
/*
* data read operation
*/
struct fscache_retrieval {
struct fscache_operation op;
struct fscache_cookie *cookie; /* The netfs cookie */
struct address_space *mapping; /* netfs pages */
fscache_rw_complete_t end_io_func; /* function to call on I/O completion */
void *context; /* netfs read context (pinned) */
@ -371,6 +359,7 @@ struct fscache_object {
#define FSCACHE_OBJECT_IS_LOOKED_UP 4 /* T if object has been looked up */
#define FSCACHE_OBJECT_IS_AVAILABLE 5 /* T if object has become active */
#define FSCACHE_OBJECT_RETIRED 6 /* T if object was retired on relinquishment */
#define FSCACHE_OBJECT_KILLED_BY_CACHE 7 /* T if object was killed by the cache */
struct list_head cache_link; /* link in cache->object_list */
struct hlist_node cookie_link; /* link in cookie->backing_objects */
@ -410,17 +399,16 @@ static inline bool fscache_object_is_available(struct fscache_object *object)
return test_bit(FSCACHE_OBJECT_IS_AVAILABLE, &object->flags);
}
static inline bool fscache_cache_is_broken(struct fscache_object *object)
{
return test_bit(FSCACHE_IOERROR, &object->cache->flags);
}
static inline bool fscache_object_is_active(struct fscache_object *object)
{
return fscache_object_is_available(object) &&
fscache_object_is_live(object) &&
!test_bit(FSCACHE_IOERROR, &object->cache->flags);
}
static inline bool fscache_object_is_dead(struct fscache_object *object)
{
return fscache_object_is_dying(object) &&
test_bit(FSCACHE_IOERROR, &object->cache->flags);
!fscache_cache_is_broken(object);
}
/**
@ -551,4 +539,15 @@ extern enum fscache_checkaux fscache_check_aux(struct fscache_object *object,
const void *data,
uint16_t datalen);
extern void fscache_object_retrying_stale(struct fscache_object *object);
enum fscache_why_object_killed {
FSCACHE_OBJECT_IS_STALE,
FSCACHE_OBJECT_NO_SPACE,
FSCACHE_OBJECT_WAS_RETIRED,
FSCACHE_OBJECT_WAS_CULLED,
};
extern void fscache_object_mark_killed(struct fscache_object *object,
enum fscache_why_object_killed why);
#endif /* _LINUX_FSCACHE_CACHE_H */

6
include/linux/pagemap.h
View File

@ -671,4 +671,10 @@ static inline int add_to_page_cache(struct page *page,
return error;
}
static inline unsigned long dir_pages(struct inode *inode)
{
return (unsigned long)(inode->i_size + PAGE_CACHE_SIZE - 1) >>
PAGE_CACHE_SHIFT;
}
#endif /* _LINUX_PAGEMAP_H */

1
include/linux/seq_file.h
View File

@ -123,6 +123,7 @@ __printf(2, 3) int seq_printf(struct seq_file *, const char *, ...);
__printf(2, 0) int seq_vprintf(struct seq_file *, const char *, va_list args);
int seq_path(struct seq_file *, const struct path *, const char *);
int seq_file_path(struct seq_file *, struct file *, const char *);
int seq_dentry(struct seq_file *, struct dentry *, const char *);
int seq_path_root(struct seq_file *m, const struct path *path,
const struct path *root, const char *esc);

2
kernel/events/core.c
View File

@ -5794,7 +5794,7 @@ static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
* need to add enough zero bytes after the string to handle
* the 64bit alignment we do later.
*/
name = d_path(&file->f_path, buf, PATH_MAX - sizeof(u64));
name = file_path(file, buf, PATH_MAX - sizeof(u64));
if (IS_ERR(name)) {
name = "//toolong";
goto cpy_name;

2
mm/filemap.c
View File

@ -2563,7 +2563,7 @@ ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
/* We can write back this queue in page reclaim */
current->backing_dev_info = inode_to_bdi(inode);
err = file_remove_suid(file);
err = file_remove_privs(file);
if (err)
goto out;

2
mm/memory.c
View File

@ -3726,7 +3726,7 @@ void print_vma_addr(char *prefix, unsigned long ip)
if (buf) {
char *p;
p = d_path(&f->f_path, buf, PAGE_SIZE);
p = file_path(f, buf, PAGE_SIZE);
if (IS_ERR(p))
p = "?";
printk("%s%s[%lx+%lx]", prefix, kbasename(p),

2
mm/swapfile.c
View File

@ -2032,7 +2032,7 @@ static int swap_show(struct seq_file *swap, void *v)
}
file = si->swap_file;
len = seq_path(swap, &file->f_path, " \t\n\\");
len = seq_file_path(swap, file, " \t\n\\");
seq_printf(swap, "%*s%s\t%u\t%u\t%d\n",
len < 40 ? 40 - len : 1, " ",
S_ISBLK(file_inode(file)->i_mode) ?

12
net/9p/client.c
View File

@ -843,7 +843,8 @@ static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type,
if (err < 0) {
if (err == -EIO)
c->status = Disconnected;
goto reterr;
if (err != -ERESTARTSYS)
goto reterr;
}
if (req->status == REQ_STATUS_ERROR) {
p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
@ -1582,6 +1583,10 @@ p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err)
p9_free_req(clnt, req);
break;
}
if (rsize < count) {
pr_err("bogus RREAD count (%d > %d)\n", count, rsize);
count = rsize;
}
p9_debug(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
if (!count) {
@ -1647,6 +1652,11 @@ p9_client_write(struct p9_fid *fid, u64 offset, struct iov_iter *from, int *err)
if (*err) {
trace_9p_protocol_dump(clnt, req->rc);
p9_free_req(clnt, req);
break;
}
if (rsize < count) {
pr_err("bogus RWRITE count (%d > %d)\n", count, rsize);
count = rsize;
}
p9_debug(P9_DEBUG_9P, "<<< RWRITE count %d\n", count);

19
security/inode.c
View File

@ -25,11 +25,6 @@
static struct vfsmount *mount;
static int mount_count;
static inline int positive(struct dentry *dentry)
{
return d_really_is_positive(dentry) && !d_unhashed(dentry);
}
static int fill_super(struct super_block *sb, void *data, int silent)
{
static struct tree_descr files[] = {{""}};
@ -201,14 +196,12 @@ void securityfs_remove(struct dentry *dentry)
return;
mutex_lock(&d_inode(parent)->i_mutex);
if (positive(dentry)) {
if (d_really_is_positive(dentry)) {
if (d_is_dir(dentry))
simple_rmdir(d_inode(parent), dentry);
else
simple_unlink(d_inode(parent), dentry);
dput(dentry);
}
if (simple_positive(dentry)) {
if (d_is_dir(dentry))
simple_rmdir(d_inode(parent), dentry);
else
simple_unlink(d_inode(parent), dentry);
dput(dentry);
}
mutex_unlock(&d_inode(parent)->i_mutex);
simple_release_fs(&mount, &mount_count);