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fs/ntfs3: Implement fallocate for compressed files

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Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2024-07-18 17:45:12 +03:00
parent 70dd48ca3a
commit 9a2d6a40b8
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GPG Key ID: A9B0331F832407B6
2 changed files with 17 additions and 11 deletions
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25
fs/ntfs3/attrib.c
View File

@ -976,15 +976,17 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
goto out; goto out;
/* Check for compressed frame. */ /* 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) if (err)
goto out; goto out;
if (hint) { if (hint) {
/* if frame is compressed - don't touch it. */ /* if frame is compressed - don't touch it. */
*lcn = COMPRESSED_LCN; *lcn = COMPRESSED_LCN;
*len = hint; /* length to the end of frame. */
err = -EOPNOTSUPP; *len = NTFS_LZNT_CLUSTERS - (vcn & (NTFS_LZNT_CLUSTERS - 1));
err = 0;
goto out; 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. */ /* Check if 'vcn' and 'vcn0' in different attribute segments. */
if (vcn < svcn || evcn1 <= vcn) { if (vcn < svcn || evcn1 <= vcn) {
/* Load attribute for truncated vcn. */ struct ATTRIB *attr2;
attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, /* Load runs for truncated vcn. */
&vcn, &mi); attr2 = ni_find_attr(ni, attr_b, &le_b, ATTR_DATA, NULL,
if (!attr) { 0, &vcn, &mi);
if (!attr2) {
err = -EINVAL; err = -EINVAL;
goto out; goto out;
} }
svcn = le64_to_cpu(attr->nres.svcn); evcn1 = le64_to_cpu(attr2->nres.evcn) + 1;
evcn1 = le64_to_cpu(attr->nres.evcn) + 1; err = attr_load_runs(attr2, ni, run, NULL);
err = attr_load_runs(attr, ni, run, NULL);
if (err) if (err)
goto out; goto out;
} }
@ -1517,6 +1519,9 @@ out:
/* /*
* attr_is_frame_compressed - Used to detect compressed frame. * 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, int attr_is_frame_compressed(struct ntfs_inode *ni, struct ATTRIB *attr,
CLST frame, CLST *clst_data) CLST frame, CLST *clst_data)

3
fs/ntfs3/inode.c
View File

@ -609,7 +609,8 @@ static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo,
bytes = ((u64)len << cluster_bits) - off; 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 (!create) {
if (bh->b_size > bytes) if (bh->b_size > bytes)
bh->b_size = bytes; bh->b_size = bytes;