github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 17:13:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

erofs: add SEEK_{DATA,HOLE} support

Browse Source 
Many userspace programs (including erofs-utils itself) use SEEK_DATA /
SEEK_HOLE to parse hole extents in addition to FIEMAP.

Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20241011065128.2097377-1-hsiangkao@linux.alibaba.com
This commit is contained in:
Gao Xiang 2024-10-11 14:51:28 +08:00
parent 59b723cd2a
commit 83a8836fa1
1 changed files with 25 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
fs/erofs/data.c
View File

@ -473,8 +473,32 @@ static int erofs_file_mmap(struct file *file, struct vm_area_struct *vma)
#define erofs_file_mmap generic_file_readonly_mmap
#endif
static loff_t erofs_file_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
const struct iomap_ops *ops = &erofs_iomap_ops;
if (erofs_inode_is_data_compressed(EROFS_I(inode)->datalayout))
#ifdef CONFIG_EROFS_FS_ZIP
ops = &z_erofs_iomap_report_ops;
#else
return generic_file_llseek(file, offset, whence);
#endif
if (whence == SEEK_HOLE)
offset = iomap_seek_hole(inode, offset, ops);
else if (whence == SEEK_DATA)
offset = iomap_seek_data(inode, offset, ops);
else
return generic_file_llseek(file, offset, whence);
if (offset < 0)
return offset;
return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
}
const struct file_operations erofs_file_fops = {
.llseek = generic_file_llseek,
.llseek = erofs_file_llseek,
.read_iter = erofs_file_read_iter,
.mmap = erofs_file_mmap,
.get_unmapped_area = thp_get_unmapped_area,