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fs/ntfs3: Fix transform resident to nonresident for compressed files

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Сorrected calculation of required space len (in clusters)
for attribute data storage in case of compression.

Fixes: be71b5cba2 ("fs/ntfs3: Add attrib operations")
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2024-05-16 01:10:01 +03:00
parent 3cdad499ac
commit 25610ff98d
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GPG Key ID: A9B0331F832407B6
1 changed files with 8 additions and 5 deletions
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13
fs/ntfs3/attrib.c
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@ -231,7 +231,7 @@ int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
struct ntfs_sb_info *sbi;
struct ATTRIB *attr_s;
struct MFT_REC *rec;
u32 used, asize, rsize, aoff, align;
u32 used, asize, rsize, aoff;
bool is_data;
CLST len, alen;
char *next;
@ -252,10 +252,13 @@ int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
rsize = le32_to_cpu(attr->res.data_size);
is_data = attr->type == ATTR_DATA && !attr->name_len;
align = sbi->cluster_size;
if (is_attr_compressed(attr))
align <<= NTFS_LZNT_CUNIT;
len = (rsize + align - 1) >> sbi->cluster_bits;
/* len - how many clusters required to store 'rsize' bytes */
if (is_attr_compressed(attr)) {
u8 shift = sbi->cluster_bits + NTFS_LZNT_CUNIT;
len = ((rsize + (1u << shift) - 1) >> shift) << NTFS_LZNT_CUNIT;
} else {
len = bytes_to_cluster(sbi, rsize);
}
run_init(run);