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Diffstat (limited to 'mm/shmem.c')
-rw-r--r--mm/shmem.c143
1 files changed, 9 insertions, 134 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 7f7748a0f9e1..8596217b5e26 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -270,7 +270,7 @@ bool shmem_charge(struct inode *inode, long pages)
info->alloced -= pages;
shmem_recalc_inode(inode);
spin_unlock_irqrestore(&info->lock, flags);
-
+ shmem_unacct_blocks(info->flags, pages);
return false;
}
percpu_counter_add(&sbinfo->used_blocks, pages);
@@ -291,6 +291,7 @@ void shmem_uncharge(struct inode *inode, long pages)
if (sbinfo->max_blocks)
percpu_counter_sub(&sbinfo->used_blocks, pages);
+ shmem_unacct_blocks(info->flags, pages);
}
/*
@@ -959,7 +960,7 @@ static int shmem_setattr(struct dentry *dentry, struct iattr *attr)
struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
int error;
- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;
@@ -1980,7 +1981,7 @@ unsigned long shmem_get_unmapped_area(struct file *file,
return addr;
sb = shm_mnt->mnt_sb;
}
- if (SHMEM_SB(sb)->huge != SHMEM_HUGE_NEVER)
+ if (SHMEM_SB(sb)->huge == SHMEM_HUGE_NEVER)
return addr;
}
@@ -2310,119 +2311,6 @@ static ssize_t shmem_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
return retval ? retval : error;
}
-static ssize_t shmem_file_splice_read(struct file *in, loff_t *ppos,
- struct pipe_inode_info *pipe, size_t len,
- unsigned int flags)
-{
- struct address_space *mapping = in->f_mapping;
- struct inode *inode = mapping->host;
- unsigned int loff, nr_pages, req_pages;
- struct page *pages[PIPE_DEF_BUFFERS];
- struct partial_page partial[PIPE_DEF_BUFFERS];
- struct page *page;
- pgoff_t index, end_index;
- loff_t isize, left;
- int error, page_nr;
- struct splice_pipe_desc spd = {
- .pages = pages,
- .partial = partial,
- .nr_pages_max = PIPE_DEF_BUFFERS,
- .flags = flags,
- .ops = &page_cache_pipe_buf_ops,
- .spd_release = spd_release_page,
- };
-
- isize = i_size_read(inode);
- if (unlikely(*ppos >= isize))
- return 0;
-
- left = isize - *ppos;
- if (unlikely(left < len))
- len = left;
-
- if (splice_grow_spd(pipe, &spd))
- return -ENOMEM;
-
- index = *ppos >> PAGE_SHIFT;
- loff = *ppos & ~PAGE_MASK;
- req_pages = (len + loff + PAGE_SIZE - 1) >> PAGE_SHIFT;
- nr_pages = min(req_pages, spd.nr_pages_max);
-
- spd.nr_pages = find_get_pages_contig(mapping, index,
- nr_pages, spd.pages);
- index += spd.nr_pages;
- error = 0;
-
- while (spd.nr_pages < nr_pages) {
- error = shmem_getpage(inode, index, &page, SGP_CACHE);
- if (error)
- break;
- unlock_page(page);
- spd.pages[spd.nr_pages++] = page;
- index++;
- }
-
- index = *ppos >> PAGE_SHIFT;
- nr_pages = spd.nr_pages;
- spd.nr_pages = 0;
-
- for (page_nr = 0; page_nr < nr_pages; page_nr++) {
- unsigned int this_len;
-
- if (!len)
- break;
-
- this_len = min_t(unsigned long, len, PAGE_SIZE - loff);
- page = spd.pages[page_nr];
-
- if (!PageUptodate(page) || page->mapping != mapping) {
- error = shmem_getpage(inode, index, &page, SGP_CACHE);
- if (error)
- break;
- unlock_page(page);
- put_page(spd.pages[page_nr]);
- spd.pages[page_nr] = page;
- }
-
- isize = i_size_read(inode);
- end_index = (isize - 1) >> PAGE_SHIFT;
- if (unlikely(!isize || index > end_index))
- break;
-
- if (end_index == index) {
- unsigned int plen;
-
- plen = ((isize - 1) & ~PAGE_MASK) + 1;
- if (plen <= loff)
- break;
-
- this_len = min(this_len, plen - loff);
- len = this_len;
- }
-
- spd.partial[page_nr].offset = loff;
- spd.partial[page_nr].len = this_len;
- len -= this_len;
- loff = 0;
- spd.nr_pages++;
- index++;
- }
-
- while (page_nr < nr_pages)
- put_page(spd.pages[page_nr++]);
-
- if (spd.nr_pages)
- error = splice_to_pipe(pipe, &spd);
-
- splice_shrink_spd(&spd);
-
- if (error > 0) {
- *ppos += error;
- file_accessed(in);
- }
- return error;
-}
-
/*
* llseek SEEK_DATA or SEEK_HOLE through the radix_tree.
*/
@@ -3287,10 +3175,7 @@ static const struct inode_operations shmem_short_symlink_operations = {
.readlink = generic_readlink,
.get_link = simple_get_link,
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = generic_setxattr,
- .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = generic_removexattr,
#endif
};
@@ -3298,10 +3183,7 @@ static const struct inode_operations shmem_symlink_inode_operations = {
.readlink = generic_readlink,
.get_link = shmem_get_link,
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = generic_setxattr,
- .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = generic_removexattr,
#endif
};
@@ -3785,7 +3667,7 @@ static const struct file_operations shmem_file_operations = {
.read_iter = shmem_file_read_iter,
.write_iter = generic_file_write_iter,
.fsync = noop_fsync,
- .splice_read = shmem_file_splice_read,
+ .splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.fallocate = shmem_fallocate,
#endif
@@ -3795,10 +3677,7 @@ static const struct inode_operations shmem_inode_operations = {
.getattr = shmem_getattr,
.setattr = shmem_setattr,
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = generic_setxattr,
- .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = generic_removexattr,
.set_acl = simple_set_acl,
#endif
};
@@ -3817,10 +3696,7 @@ static const struct inode_operations shmem_dir_inode_operations = {
.tmpfile = shmem_tmpfile,
#endif
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = generic_setxattr,
- .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = generic_removexattr,
#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_setattr,
@@ -3830,10 +3706,7 @@ static const struct inode_operations shmem_dir_inode_operations = {
static const struct inode_operations shmem_special_inode_operations = {
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = generic_setxattr,
- .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = generic_removexattr,
#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_setattr,
@@ -3975,7 +3848,9 @@ static ssize_t shmem_enabled_store(struct kobject *kobj,
struct kobj_attribute shmem_enabled_attr =
__ATTR(shmem_enabled, 0644, shmem_enabled_show, shmem_enabled_store);
+#endif /* CONFIG_TRANSPARENT_HUGE_PAGECACHE && CONFIG_SYSFS */
+#ifdef CONFIG_TRANSPARENT_HUGE_PAGECACHE
bool shmem_huge_enabled(struct vm_area_struct *vma)
{
struct inode *inode = file_inode(vma->vm_file);
@@ -4006,7 +3881,7 @@ bool shmem_huge_enabled(struct vm_area_struct *vma)
return false;
}
}
-#endif /* CONFIG_TRANSPARENT_HUGE_PAGECACHE && CONFIG_SYSFS */
+#endif /* CONFIG_TRANSPARENT_HUGE_PAGECACHE */
#else /* !CONFIG_SHMEM */
@@ -4075,7 +3950,7 @@ EXPORT_SYMBOL_GPL(shmem_truncate_range);
/* common code */
-static struct dentry_operations anon_ops = {
+static const struct dentry_operations anon_ops = {
.d_dname = simple_dname
};
generated by cgit (git 2.34.1) at 2024-06-19 10:59:54 +0000