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| author | Hongzhen Luo <hongzhen@linux.alibaba.com> | 2026-01-23 04:31:32 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2026-01-23 15:02:09 +0300 |
| commit | d86d7817c042dd651d47b1873f4b6eaefbedd890 (patch) | |
| tree | 1a78e17af31c11a410ccc879f3533084a941cecc | |
| parent | 9364b55a4dbf1ae9a8cb077cb8b7d0c7401d00fc (diff) | |
| download | linux-d86d7817c042dd651d47b1873f4b6eaefbedd890.tar.xz | |
erofs: implement .fadvise for page cache share
This patch implements the .fadvise interface for page cache share.
Similar to overlayfs, it drops those clean, unused pages through
vfs_fadvise().
Signed-off-by: Hongzhen Luo <hongzhen@linux.alibaba.com>
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
| -rw-r--r-- | fs/erofs/ishare.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/erofs/ishare.c b/fs/erofs/ishare.c index ad53a57dbcbc..ce980320a8b9 100644 --- a/fs/erofs/ishare.c +++ b/fs/erofs/ishare.c @@ -151,6 +151,12 @@ static int erofs_ishare_mmap(struct file *file, struct vm_area_struct *vma) return generic_file_readonly_mmap(file, vma); } +static int erofs_ishare_fadvise(struct file *file, loff_t offset, + loff_t len, int advice) +{ + return vfs_fadvise(file->private_data, offset, len, advice); +} + const struct file_operations erofs_ishare_fops = { .open = erofs_ishare_file_open, .llseek = generic_file_llseek, @@ -159,6 +165,7 @@ const struct file_operations erofs_ishare_fops = { .release = erofs_ishare_file_release, .get_unmapped_area = thp_get_unmapped_area, .splice_read = filemap_splice_read, + .fadvise = erofs_ishare_fadvise, }; struct inode *erofs_real_inode(struct inode *inode, bool *need_iput) |