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ksmbd: retrieve number of blocks using vfs_getattr in set_file_allocation_info
[ Upstream commit 34cd86b663
]
Use vfs_getattr() to retrieve stat information, rather than make
assumptions about how a filesystem fills inode structs.
Cc: stable@vger.kernel.org
Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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parent
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commit
34cd4d5de1
1 changed files with 8 additions and 2 deletions
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@ -5759,15 +5759,21 @@ static int set_file_allocation_info(struct ksmbd_work *work,
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loff_t alloc_blks;
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struct inode *inode;
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struct kstat stat;
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int rc;
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if (!(fp->daccess & FILE_WRITE_DATA_LE))
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return -EACCES;
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rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
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AT_STATX_SYNC_AS_STAT);
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if (rc)
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return rc;
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alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
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inode = file_inode(fp->filp);
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if (alloc_blks > inode->i_blocks) {
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if (alloc_blks > stat.blocks) {
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smb_break_all_levII_oplock(work, fp, 1);
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rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
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alloc_blks * 512);
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@ -5775,7 +5781,7 @@ static int set_file_allocation_info(struct ksmbd_work *work,
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pr_err("vfs_fallocate is failed : %d\n", rc);
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return rc;
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}
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} else if (alloc_blks < inode->i_blocks) {
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} else if (alloc_blks < stat.blocks) {
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loff_t size;
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/*
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