}
if (PageTransHuge(page)) {
count_vm_event(THP_FILE_ALLOC);
- __inc_lruvec_page_state(page, NR_SHMEM_THPS);
+ __mod_lruvec_page_state(page, NR_SHMEM_THPS, nr);
}
mapping->nrpages += nr;
__mod_lruvec_page_state(page, NR_FILE_PAGES, nr);
void shmem_unlock_mapping(struct address_space *mapping)
{
struct pagevec pvec;
- pgoff_t indices[PAGEVEC_SIZE];
pgoff_t index = 0;
pagevec_init(&pvec);
* Minor point, but we might as well stop if someone else SHM_LOCKs it.
*/
while (!mapping_unevictable(mapping)) {
- /*
- * Avoid pagevec_lookup(): find_get_pages() returns 0 as if it
- * has finished, if it hits a row of PAGEVEC_SIZE swap entries.
- */
- pvec.nr = find_get_entries(mapping, index,
- PAGEVEC_SIZE, pvec.pages, indices);
- if (!pvec.nr)
+ if (!pagevec_lookup(&pvec, mapping, &index))
break;
- index = indices[pvec.nr - 1] + 1;
- pagevec_remove_exceptionals(&pvec);
check_move_unevictable_pages(&pvec);
pagevec_release(&pvec);
cond_resched();
pagevec_init(&pvec);
index = start;
- while (index < end) {
- pvec.nr = find_get_entries(mapping, index,
- min(end - index, (pgoff_t)PAGEVEC_SIZE),
- pvec.pages, indices);
- if (!pvec.nr)
- break;
+ while (index < end && find_lock_entries(mapping, index, end - 1,
+ &pvec, indices)) {
for (i = 0; i < pagevec_count(&pvec); i++) {
struct page *page = pvec.pages[i];
index = indices[i];
- if (index >= end)
- break;
if (xa_is_value(page)) {
if (unfalloc)
index, page);
continue;
}
+ index += thp_nr_pages(page) - 1;
- VM_BUG_ON_PAGE(page_to_pgoff(page) != index, page);
-
- if (!trylock_page(page))
- continue;
-
- if ((!unfalloc || !PageUptodate(page)) &&
- page_mapping(page) == mapping) {
- VM_BUG_ON_PAGE(PageWriteback(page), page);
- if (shmem_punch_compound(page, start, end))
- truncate_inode_page(mapping, page);
- }
+ if (!unfalloc || !PageUptodate(page))
+ truncate_inode_page(mapping, page);
unlock_page(page);
}
pagevec_remove_exceptionals(&pvec);
while (index < end) {
cond_resched();
- pvec.nr = find_get_entries(mapping, index,
- min(end - index, (pgoff_t)PAGEVEC_SIZE),
- pvec.pages, indices);
- if (!pvec.nr) {
+ if (!find_get_entries(mapping, index, end - 1, &pvec,
+ indices)) {
/* If all gone or hole-punch or unfalloc, we're done */
if (index == start || end != -1)
break;
struct page *page = pvec.pages[i];
index = indices[i];
- if (index >= end)
- break;
-
if (xa_is_value(page)) {
if (unfalloc)
continue;
}
EXPORT_SYMBOL_GPL(shmem_truncate_range);
-static int shmem_getattr(const struct path *path, struct kstat *stat,
+static int shmem_getattr(struct user_namespace *mnt_userns,
+ const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_flags)
{
struct inode *inode = path->dentry->d_inode;
shmem_recalc_inode(inode);
spin_unlock_irq(&info->lock);
}
- generic_fillattr(inode, stat);
+ generic_fillattr(&init_user_ns, inode, stat);
if (is_huge_enabled(sb_info))
stat->blksize = HPAGE_PMD_SIZE;
return 0;
}
-static int shmem_setattr(struct dentry *dentry, struct iattr *attr)
+static int shmem_setattr(struct user_namespace *mnt_userns,
+ struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = d_inode(dentry);
struct shmem_inode_info *info = SHMEM_I(inode);
struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
int error;
- error = setattr_prepare(dentry, attr);
+ error = setattr_prepare(&init_user_ns, dentry, attr);
if (error)
return error;
}
}
- setattr_copy(inode, attr);
+ setattr_copy(&init_user_ns, inode, attr);
if (attr->ia_valid & ATTR_MODE)
- error = posix_acl_chmod(inode, inode->i_mode);
+ error = posix_acl_chmod(&init_user_ns, inode, inode->i_mode);
return error;
}
return page;
}
+/*
+ * Make sure huge_gfp is always more limited than limit_gfp.
+ * Some of the flags set permissions, while others set limitations.
+ */
+static gfp_t limit_gfp_mask(gfp_t huge_gfp, gfp_t limit_gfp)
+{
+ gfp_t allowflags = __GFP_IO | __GFP_FS | __GFP_RECLAIM;
+ gfp_t denyflags = __GFP_NOWARN | __GFP_NORETRY;
+ gfp_t zoneflags = limit_gfp & GFP_ZONEMASK;
+ gfp_t result = huge_gfp & ~(allowflags | GFP_ZONEMASK);
+
+ /* Allow allocations only from the originally specified zones. */
+ result |= zoneflags;
+
+ /*
+ * Minimize the result gfp by taking the union with the deny flags,
+ * and the intersection of the allow flags.
+ */
+ result |= (limit_gfp & denyflags);
+ result |= (huge_gfp & limit_gfp) & allowflags;
+
+ return result;
+}
+
static struct page *shmem_alloc_hugepage(gfp_t gfp,
struct shmem_inode_info *info, pgoff_t index)
{
return NULL;
shmem_pseudo_vma_init(&pvma, info, hindex);
- page = alloc_pages_vma(gfp | __GFP_COMP | __GFP_NORETRY | __GFP_NOWARN,
- HPAGE_PMD_ORDER, &pvma, 0, numa_node_id(), true);
+ page = alloc_pages_vma(gfp, HPAGE_PMD_ORDER, &pvma, 0, numa_node_id(),
+ true);
shmem_pseudo_vma_destroy(&pvma);
if (page)
prep_transhuge_page(page);
struct page *page;
enum sgp_type sgp_huge = sgp;
pgoff_t hindex = index;
+ gfp_t huge_gfp;
int error;
int once = 0;
int alloced = 0;
sbinfo = SHMEM_SB(inode->i_sb);
charge_mm = vma ? vma->vm_mm : current->mm;
- page = find_lock_entry(mapping, index);
+ page = pagecache_get_page(mapping, index,
+ FGP_ENTRY | FGP_HEAD | FGP_LOCK, 0);
if (xa_is_value(page)) {
error = shmem_swapin_page(inode, index, &page,
sgp, gfp, vma, fault_type);
}
alloc_huge:
- page = shmem_alloc_and_acct_page(gfp, inode, index, true);
+ huge_gfp = vma_thp_gfp_mask(vma);
+ huge_gfp = limit_gfp_mask(huge_gfp, gfp);
+ page = shmem_alloc_and_acct_page(huge_gfp, inode, index, true);
if (IS_ERR(page)) {
alloc_nohuge:
page = shmem_alloc_and_acct_page(gfp, inode,
inode = new_inode(sb);
if (inode) {
inode->i_ino = ino;
- inode_init_owner(inode, dir, mode);
+ inode_init_owner(&init_user_ns, inode, dir, mode);
inode->i_blocks = 0;
inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
inode->i_generation = prandom_u32();
return retval ? retval : error;
}
-/*
- * llseek SEEK_DATA or SEEK_HOLE through the page cache.
- */
-static pgoff_t shmem_seek_hole_data(struct address_space *mapping,
- pgoff_t index, pgoff_t end, int whence)
-{
- struct page *page;
- struct pagevec pvec;
- pgoff_t indices[PAGEVEC_SIZE];
- bool done = false;
- int i;
-
- pagevec_init(&pvec);
- pvec.nr = 1; /* start small: we may be there already */
- while (!done) {
- pvec.nr = find_get_entries(mapping, index,
- pvec.nr, pvec.pages, indices);
- if (!pvec.nr) {
- if (whence == SEEK_DATA)
- index = end;
- break;
- }
- for (i = 0; i < pvec.nr; i++, index++) {
- if (index < indices[i]) {
- if (whence == SEEK_HOLE) {
- done = true;
- break;
- }
- index = indices[i];
- }
- page = pvec.pages[i];
- if (page && !xa_is_value(page)) {
- if (!PageUptodate(page))
- page = NULL;
- }
- if (index >= end ||
- (page && whence == SEEK_DATA) ||
- (!page && whence == SEEK_HOLE)) {
- done = true;
- break;
- }
- }
- pagevec_remove_exceptionals(&pvec);
- pagevec_release(&pvec);
- pvec.nr = PAGEVEC_SIZE;
- cond_resched();
- }
- return index;
-}
-
static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
{
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
- pgoff_t start, end;
- loff_t new_offset;
if (whence != SEEK_DATA && whence != SEEK_HOLE)
return generic_file_llseek_size(file, offset, whence,
MAX_LFS_FILESIZE, i_size_read(inode));
+ if (offset < 0)
+ return -ENXIO;
+
inode_lock(inode);
/* We're holding i_mutex so we can access i_size directly */
-
- if (offset < 0 || offset >= inode->i_size)
- offset = -ENXIO;
- else {
- start = offset >> PAGE_SHIFT;
- end = (inode->i_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
- new_offset = shmem_seek_hole_data(mapping, start, end, whence);
- new_offset <<= PAGE_SHIFT;
- if (new_offset > offset) {
- if (new_offset < inode->i_size)
- offset = new_offset;
- else if (whence == SEEK_DATA)
- offset = -ENXIO;
- else
- offset = inode->i_size;
- }
- }
-
+ offset = mapping_seek_hole_data(mapping, offset, inode->i_size, whence);
if (offset >= 0)
offset = vfs_setpos(file, offset, MAX_LFS_FILESIZE);
inode_unlock(inode);
* File creation. Allocate an inode, and we're done..
*/
static int
-shmem_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
+shmem_mknod(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, umode_t mode, dev_t dev)
{
struct inode *inode;
int error = -ENOSPC;
}
static int
-shmem_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+shmem_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, umode_t mode)
{
struct inode *inode;
int error = -ENOSPC;
return error;
}
-static int shmem_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+static int shmem_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, umode_t mode)
{
int error;
- if ((error = shmem_mknod(dir, dentry, mode | S_IFDIR, 0)))
+ if ((error = shmem_mknod(&init_user_ns, dir, dentry,
+ mode | S_IFDIR, 0)))
return error;
inc_nlink(dir);
return 0;
}
-static int shmem_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- bool excl)
+static int shmem_create(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, umode_t mode, bool excl)
{
- return shmem_mknod(dir, dentry, mode | S_IFREG, 0);
+ return shmem_mknod(&init_user_ns, dir, dentry, mode | S_IFREG, 0);
}
/*
return 0;
}
-static int shmem_whiteout(struct inode *old_dir, struct dentry *old_dentry)
+static int shmem_whiteout(struct user_namespace *mnt_userns,
+ struct inode *old_dir, struct dentry *old_dentry)
{
struct dentry *whiteout;
int error;
if (!whiteout)
return -ENOMEM;
- error = shmem_mknod(old_dir, whiteout,
+ error = shmem_mknod(&init_user_ns, old_dir, whiteout,
S_IFCHR | WHITEOUT_MODE, WHITEOUT_DEV);
dput(whiteout);
if (error)
* it exists so that the VFS layer correctly free's it when it
* gets overwritten.
*/
-static int shmem_rename2(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags)
+static int shmem_rename2(struct user_namespace *mnt_userns,
+ struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry,
+ unsigned int flags)
{
struct inode *inode = d_inode(old_dentry);
int they_are_dirs = S_ISDIR(inode->i_mode);
if (flags & RENAME_WHITEOUT) {
int error;
- error = shmem_whiteout(old_dir, old_dentry);
+ error = shmem_whiteout(&init_user_ns, old_dir, old_dentry);
if (error)
return error;
}
return 0;
}
-static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
+static int shmem_symlink(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, const char *symname)
{
int error;
int len;
}
static int shmem_xattr_handler_set(const struct xattr_handler *handler,
+ struct user_namespace *mnt_userns,
struct dentry *unused, struct inode *inode,
const char *name, const void *value,
size_t size, int flags)
projects / linux-2.6-microblaze.git / blobdiff