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Diffstat (limited to 'fs/cramfs/inode.c')
-rw-r--r--fs/cramfs/inode.c70
1 files changed, 39 insertions, 31 deletions
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 61ccf7722fc3..e54ebe402df7 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -17,7 +17,6 @@
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/pagemap.h>
-#include <linux/pfn_t.h>
#include <linux/ramfs.h>
#include <linux/init.h>
#include <linux/string.h>
@@ -96,7 +95,7 @@ static struct inode *get_cramfs_inode(struct super_block *sb,
inode = iget_locked(sb, cramino(cramfs_inode, offset));
if (!inode)
return ERR_PTR(-ENOMEM);
- if (!(inode->i_state & I_NEW))
+ if (!(inode_state_read_once(inode) & I_NEW))
return inode;
switch (cramfs_inode->mode & S_IFMT) {
@@ -117,9 +116,18 @@ static struct inode *get_cramfs_inode(struct super_block *sb,
inode_nohighmem(inode);
inode->i_data.a_ops = &cramfs_aops;
break;
- default:
+ case S_IFCHR:
+ case S_IFBLK:
+ case S_IFIFO:
+ case S_IFSOCK:
init_special_inode(inode, cramfs_inode->mode,
old_decode_dev(cramfs_inode->size));
+ break;
+ default:
+ printk(KERN_DEBUG "CRAMFS: Invalid file type 0%04o for inode %lu.\n",
+ inode->i_mode, inode->i_ino);
+ iget_failed(inode);
+ return ERR_PTR(-EIO);
}
inode->i_mode = cramfs_inode->mode;
@@ -133,7 +141,8 @@ static struct inode *get_cramfs_inode(struct super_block *sb,
}
/* Struct copy intentional */
- inode->i_mtime = inode->i_atime = inode->i_ctime = zerotime;
+ inode_set_mtime_to_ts(inode,
+ inode_set_atime_to_ts(inode, inode_set_ctime_to_ts(inode, zerotime)));
/* inode->i_nlink is left 1 - arguably wrong for directories,
but it's the best we can do without reading the directory
contents. 1 yields the right result in GNU find, even
@@ -182,8 +191,8 @@ static int next_buffer;
static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset,
unsigned int len)
{
- struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
- struct file_ra_state ra;
+ struct address_space *mapping = sb->s_bdev->bd_mapping;
+ struct file_ra_state ra = {};
struct page *pages[BLKS_PER_BUF];
unsigned i, blocknr, buffer;
unsigned long devsize;
@@ -238,8 +247,7 @@ static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset,
struct page *page = pages[i];
if (page) {
- memcpy(data, kmap(page), PAGE_SIZE);
- kunmap(page);
+ memcpy_from_page(data, page, 0, PAGE_SIZE);
put_page(page);
} else
memset(data, 0, PAGE_SIZE);
@@ -408,12 +416,12 @@ static int cramfs_physmem_mmap(struct file *file, struct vm_area_struct *vma)
* unpopulated ptes via cramfs_read_folio().
*/
int i;
- vma->vm_flags |= VM_MIXEDMAP;
+ vm_flags_set(vma, VM_MIXEDMAP);
for (i = 0; i < pages && !ret; i++) {
vm_fault_t vmf;
unsigned long off = i * PAGE_SIZE;
- pfn_t pfn = phys_to_pfn_t(address + off, PFN_DEV);
- vmf = vmf_insert_mixed(vma, vma->vm_start + off, pfn);
+ vmf = vmf_insert_mixed(vma, vma->vm_start + off,
+ PHYS_PFN(address + off));
if (vmf & VM_FAULT_ERROR)
ret = vm_fault_to_errno(vmf, 0);
}
@@ -437,7 +445,7 @@ bailout:
static int cramfs_physmem_mmap(struct file *file, struct vm_area_struct *vma)
{
- return vma->vm_flags & (VM_SHARED | VM_MAYSHARE) ? 0 : -ENOSYS;
+ return is_nommu_shared_mapping(vma->vm_flags) ? 0 : -ENOSYS;
}
static unsigned long cramfs_physmem_get_unmapped_area(struct file *file,
@@ -474,7 +482,7 @@ static unsigned int cramfs_physmem_mmap_capabilities(struct file *file)
static const struct file_operations cramfs_physmem_fops = {
.llseek = generic_file_llseek,
.read_iter = generic_file_read_iter,
- .splice_read = generic_file_splice_read,
+ .splice_read = filemap_splice_read,
.mmap = cramfs_physmem_mmap,
#ifndef CONFIG_MMU
.get_unmapped_area = cramfs_physmem_get_unmapped_area,
@@ -486,12 +494,16 @@ static void cramfs_kill_sb(struct super_block *sb)
{
struct cramfs_sb_info *sbi = CRAMFS_SB(sb);
+ generic_shutdown_super(sb);
+
if (IS_ENABLED(CONFIG_CRAMFS_MTD) && sb->s_mtd) {
if (sbi && sbi->mtd_point_size)
mtd_unpoint(sb->s_mtd, 0, sbi->mtd_point_size);
- kill_mtd_super(sb);
+ put_mtd_device(sb->s_mtd);
+ sb->s_mtd = NULL;
} else if (IS_ENABLED(CONFIG_CRAMFS_BLOCKDEV) && sb->s_bdev) {
- kill_block_super(sb);
+ sync_blockdev(sb->s_bdev);
+ bdev_fput(sb->s_bdev_file);
}
kfree(sbi);
}
@@ -807,19 +819,19 @@ out:
static int cramfs_read_folio(struct file *file, struct folio *folio)
{
- struct page *page = &folio->page;
- struct inode *inode = page->mapping->host;
+ struct inode *inode = folio->mapping->host;
u32 maxblock;
int bytes_filled;
void *pgdata;
+ bool success = false;
maxblock = (inode->i_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
bytes_filled = 0;
- pgdata = kmap(page);
+ pgdata = kmap_local_folio(folio, 0);
- if (page->index < maxblock) {
+ if (folio->index < maxblock) {
struct super_block *sb = inode->i_sb;
- u32 blkptr_offset = OFFSET(inode) + page->index * 4;
+ u32 blkptr_offset = OFFSET(inode) + folio->index * 4;
u32 block_ptr, block_start, block_len;
bool uncompressed, direct;
@@ -840,7 +852,7 @@ static int cramfs_read_folio(struct file *file, struct folio *folio)
if (uncompressed) {
block_len = PAGE_SIZE;
/* if last block: cap to file length */
- if (page->index == maxblock - 1)
+ if (folio->index == maxblock - 1)
block_len =
offset_in_page(inode->i_size);
} else {
@@ -857,7 +869,7 @@ static int cramfs_read_folio(struct file *file, struct folio *folio)
* from the previous block's pointer.
*/
block_start = OFFSET(inode) + maxblock * 4;
- if (page->index)
+ if (folio->index)
block_start = *(u32 *)
cramfs_read(sb, blkptr_offset - 4, 4);
/* Beware... previous ptr might be a direct ptr */
@@ -902,17 +914,12 @@ static int cramfs_read_folio(struct file *file, struct folio *folio)
}
memset(pgdata + bytes_filled, 0, PAGE_SIZE - bytes_filled);
- flush_dcache_page(page);
- kunmap(page);
- SetPageUptodate(page);
- unlock_page(page);
- return 0;
+ flush_dcache_folio(folio);
+ success = true;
err:
- kunmap(page);
- ClearPageUptodate(page);
- SetPageError(page);
- unlock_page(page);
+ kunmap_local(pgdata);
+ folio_end_read(folio, success);
return 0;
}
@@ -999,4 +1006,5 @@ static void __exit exit_cramfs_fs(void)
module_init(init_cramfs_fs)
module_exit(exit_cramfs_fs)
+MODULE_DESCRIPTION("Compressed ROM file system support");
MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-21 21:38:44 +0000