target/file: Do not return error for UNMAP if length is zero
[ Upstream commit 594e25e734
]
The function fd_execute_unmap() in target_core_file.c calles
ret = file->f_op->fallocate(file, mode, pos, len);
Some filesystems implement fallocate() to return error if
length is zero (e.g. btrfs) but according to SCSI Block
Commands spec UNMAP should return success for zero length.
Signed-off-by: Jiang Yi <jiangyilism@gmail.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
parent
23d3f106f8
commit
f6a341e87c
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@ -482,6 +482,10 @@ fd_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb)
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struct inode *inode = file->f_mapping->host;
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int ret;
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if (!nolb) {
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return 0;
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}
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if (cmd->se_dev->dev_attrib.pi_prot_type) {
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ret = fd_do_prot_unmap(cmd, lba, nolb);
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if (ret)
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