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Message-ID: <20240822155207.600355-12-almaz.alexandrovich@paragon-software.com>
Date: Thu, 22 Aug 2024 18:52:04 +0300
From: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
To: <ntfs3@...ts.linux.dev>
CC: <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Subject: [PATCH 11/14] fs/ntfs3: Implement fallocate for compressed files
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
---
fs/ntfs3/attrib.c | 25 +++++++++++++++----------
fs/ntfs3/inode.c | 3 ++-
2 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
index 6ede3e924dec..d2a9cd963429 100644
--- a/fs/ntfs3/attrib.c
+++ b/fs/ntfs3/attrib.c
@@ -976,15 +976,17 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
goto out;
/* Check for compressed frame. */
- err = attr_is_frame_compressed(ni, attr, vcn >> NTFS_LZNT_CUNIT, &hint);
+ err = attr_is_frame_compressed(ni, attr_b, vcn >> NTFS_LZNT_CUNIT,
+ &hint);
if (err)
goto out;
if (hint) {
/* if frame is compressed - don't touch it. */
*lcn = COMPRESSED_LCN;
- *len = hint;
- err = -EOPNOTSUPP;
+ /* length to the end of frame. */
+ *len = NTFS_LZNT_CLUSTERS - (vcn & (NTFS_LZNT_CLUSTERS - 1));
+ err = 0;
goto out;
}
@@ -1027,16 +1029,16 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
/* Check if 'vcn' and 'vcn0' in different attribute segments. */
if (vcn < svcn || evcn1 <= vcn) {
- /* Load attribute for truncated vcn. */
- attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0,
- &vcn, &mi);
- if (!attr) {
+ struct ATTRIB *attr2;
+ /* Load runs for truncated vcn. */
+ attr2 = ni_find_attr(ni, attr_b, &le_b, ATTR_DATA, NULL,
+ 0, &vcn, &mi);
+ if (!attr2) {
err = -EINVAL;
goto out;
}
- svcn = le64_to_cpu(attr->nres.svcn);
- evcn1 = le64_to_cpu(attr->nres.evcn) + 1;
- err = attr_load_runs(attr, ni, run, NULL);
+ evcn1 = le64_to_cpu(attr2->nres.evcn) + 1;
+ err = attr_load_runs(attr2, ni, run, NULL);
if (err)
goto out;
}
@@ -1517,6 +1519,9 @@ int attr_wof_frame_info(struct ntfs_inode *ni, struct ATTRIB *attr,
/*
* attr_is_frame_compressed - Used to detect compressed frame.
+ *
+ * attr - base (primary) attribute segment.
+ * Only base segments contains valid 'attr->nres.c_unit'
*/
int attr_is_frame_compressed(struct ntfs_inode *ni, struct ATTRIB *attr,
CLST frame, CLST *clst_data)
diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index d8fcd4882b18..d142f15b24e7 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -609,7 +609,8 @@ static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo,
bytes = ((u64)len << cluster_bits) - off;
- if (lcn == SPARSE_LCN) {
+ if (lcn >= sbi->used.bitmap.nbits) {
+ /* This case includes resident/compressed/sparse. */
if (!create) {
if (bh->b_size > bytes)
bh->b_size = bytes;
--
2.34.1
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