diff options
author | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-01-02 12:00:14 +0800 |
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committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-01-04 23:44:46 +0800 |
commit | c521e3ad6cc980df6f3bdd2616808ecb973af880 (patch) | |
tree | 710131cd19cc62d9beff6c35b85a66aa8bdf8de8 /fs/erofs/inode.c | |
parent | fdf80a4793021c2f27953b3075f401a497519ba4 (diff) | |
download | linux-c521e3ad6cc980df6f3bdd2616808ecb973af880.tar.bz2 |
erofs: use meta buffers for inode operations
Get rid of old erofs_get_meta_page() within inode operations by
using on-stack meta buffers in order to prepare subpage and folio
features.
Link: https://lore.kernel.org/r/20220102040017.51352-3-hsiangkao@linux.alibaba.com
Reviewed-by: Yue Hu <huyue2@yulong.com>
Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/erofs/inode.c')
-rw-r--r-- | fs/erofs/inode.c | 68 |
1 files changed, 32 insertions, 36 deletions
diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c index 2345f1de438e..ff62f84f47d3 100644 --- a/fs/erofs/inode.c +++ b/fs/erofs/inode.c @@ -13,8 +13,8 @@ * the inode payload page if it's an extended inode) in order to fill * inline data if possible. */ -static struct page *erofs_read_inode(struct inode *inode, - unsigned int *ofs) +static void *erofs_read_inode(struct erofs_buf *buf, + struct inode *inode, unsigned int *ofs) { struct super_block *sb = inode->i_sb; struct erofs_sb_info *sbi = EROFS_SB(sb); @@ -22,7 +22,7 @@ static struct page *erofs_read_inode(struct inode *inode, const erofs_off_t inode_loc = iloc(sbi, vi->nid); erofs_blk_t blkaddr, nblks = 0; - struct page *page; + void *kaddr; struct erofs_inode_compact *dic; struct erofs_inode_extended *die, *copied = NULL; unsigned int ifmt; @@ -34,14 +34,14 @@ static struct page *erofs_read_inode(struct inode *inode, erofs_dbg("%s, reading inode nid %llu at %u of blkaddr %u", __func__, vi->nid, *ofs, blkaddr); - page = erofs_get_meta_page(sb, blkaddr); - if (IS_ERR(page)) { + kaddr = erofs_read_metabuf(buf, sb, blkaddr, EROFS_KMAP); + if (IS_ERR(kaddr)) { erofs_err(sb, "failed to get inode (nid: %llu) page, err %ld", - vi->nid, PTR_ERR(page)); - return page; + vi->nid, PTR_ERR(kaddr)); + return kaddr; } - dic = page_address(page) + *ofs; + dic = kaddr + *ofs; ifmt = le16_to_cpu(dic->i_format); if (ifmt & ~EROFS_I_ALL) { @@ -62,12 +62,12 @@ static struct page *erofs_read_inode(struct inode *inode, switch (erofs_inode_version(ifmt)) { case EROFS_INODE_LAYOUT_EXTENDED: vi->inode_isize = sizeof(struct erofs_inode_extended); - /* check if the inode acrosses page boundary */ - if (*ofs + vi->inode_isize <= PAGE_SIZE) { + /* check if the extended inode acrosses block boundary */ + if (*ofs + vi->inode_isize <= EROFS_BLKSIZ) { *ofs += vi->inode_isize; die = (struct erofs_inode_extended *)dic; } else { - const unsigned int gotten = PAGE_SIZE - *ofs; + const unsigned int gotten = EROFS_BLKSIZ - *ofs; copied = kmalloc(vi->inode_isize, GFP_NOFS); if (!copied) { @@ -75,18 +75,16 @@ static struct page *erofs_read_inode(struct inode *inode, goto err_out; } memcpy(copied, dic, gotten); - unlock_page(page); - put_page(page); - - page = erofs_get_meta_page(sb, blkaddr + 1); - if (IS_ERR(page)) { - erofs_err(sb, "failed to get inode payload page (nid: %llu), err %ld", - vi->nid, PTR_ERR(page)); + kaddr = erofs_read_metabuf(buf, sb, blkaddr + 1, + EROFS_KMAP); + if (IS_ERR(kaddr)) { + erofs_err(sb, "failed to get inode payload block (nid: %llu), err %ld", + vi->nid, PTR_ERR(kaddr)); kfree(copied); - return page; + return kaddr; } *ofs = vi->inode_isize - gotten; - memcpy((u8 *)copied + gotten, page_address(page), *ofs); + memcpy((u8 *)copied + gotten, kaddr, *ofs); die = copied; } vi->xattr_isize = erofs_xattr_ibody_size(die->i_xattr_icount); @@ -200,7 +198,7 @@ static struct page *erofs_read_inode(struct inode *inode, inode->i_blocks = roundup(inode->i_size, EROFS_BLKSIZ) >> 9; else inode->i_blocks = nblks << LOG_SECTORS_PER_BLOCK; - return page; + return kaddr; bogusimode: erofs_err(inode->i_sb, "bogus i_mode (%o) @ nid %llu", @@ -209,12 +207,11 @@ bogusimode: err_out: DBG_BUGON(1); kfree(copied); - unlock_page(page); - put_page(page); + erofs_put_metabuf(buf); return ERR_PTR(err); } -static int erofs_fill_symlink(struct inode *inode, void *data, +static int erofs_fill_symlink(struct inode *inode, void *kaddr, unsigned int m_pofs) { struct erofs_inode *vi = EROFS_I(inode); @@ -222,7 +219,7 @@ static int erofs_fill_symlink(struct inode *inode, void *data, /* if it cannot be handled with fast symlink scheme */ if (vi->datalayout != EROFS_INODE_FLAT_INLINE || - inode->i_size >= PAGE_SIZE) { + inode->i_size >= EROFS_BLKSIZ) { inode->i_op = &erofs_symlink_iops; return 0; } @@ -232,8 +229,8 @@ static int erofs_fill_symlink(struct inode *inode, void *data, return -ENOMEM; m_pofs += vi->xattr_isize; - /* inline symlink data shouldn't cross page boundary as well */ - if (m_pofs + inode->i_size > PAGE_SIZE) { + /* inline symlink data shouldn't cross block boundary */ + if (m_pofs + inode->i_size > EROFS_BLKSIZ) { kfree(lnk); erofs_err(inode->i_sb, "inline data cross block boundary @ nid %llu", @@ -241,8 +238,7 @@ static int erofs_fill_symlink(struct inode *inode, void *data, DBG_BUGON(1); return -EFSCORRUPTED; } - - memcpy(lnk, data + m_pofs, inode->i_size); + memcpy(lnk, kaddr + m_pofs, inode->i_size); lnk[inode->i_size] = '\0'; inode->i_link = lnk; @@ -253,16 +249,17 @@ static int erofs_fill_symlink(struct inode *inode, void *data, static int erofs_fill_inode(struct inode *inode, int isdir) { struct erofs_inode *vi = EROFS_I(inode); - struct page *page; + struct erofs_buf buf = __EROFS_BUF_INITIALIZER; + void *kaddr; unsigned int ofs; int err = 0; trace_erofs_fill_inode(inode, isdir); /* read inode base data from disk */ - page = erofs_read_inode(inode, &ofs); - if (IS_ERR(page)) - return PTR_ERR(page); + kaddr = erofs_read_inode(&buf, inode, &ofs); + if (IS_ERR(kaddr)) + return PTR_ERR(kaddr); /* setup the new inode */ switch (inode->i_mode & S_IFMT) { @@ -278,7 +275,7 @@ static int erofs_fill_inode(struct inode *inode, int isdir) inode->i_fop = &erofs_dir_fops; break; case S_IFLNK: - err = erofs_fill_symlink(inode, page_address(page), ofs); + err = erofs_fill_symlink(inode, kaddr, ofs); if (err) goto out_unlock; inode_nohighmem(inode); @@ -302,8 +299,7 @@ static int erofs_fill_inode(struct inode *inode, int isdir) inode->i_mapping->a_ops = &erofs_raw_access_aops; out_unlock: - unlock_page(page); - put_page(page); + erofs_put_metabuf(&buf); return err; } |