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Fixes to enable zvol symlink creation

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This commit fixes issue on
https://github.com/behlendorf/zfs/issues/#issue/172
Changes:
- update BLKZNAME to use _IOR instead of _IO.  Kernel 2.6.32 allows
read parameters (copy_to_user) with _IO, while newer kernels (tested
Archlinux's 2.6.37 kernel) enforces _IOR (which is correct)
- fix return code and message on error

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Fajar A. Nugraha
2011-03-24 15:22:52 +07:00
committed by Brian Behlendorf
parent 7a1cdc0775
commit a5729f7b22
2 changed files with 6 additions and 3 deletions
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include/sys/fs/zfs.h
+1 -1
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@@ -785,7 +785,7 @@ typedef enum zfs_ioc {
/*
* zvol ioctl to get dataset name
*/
#define BLKZNAME _IO(0x12,125)
#define BLKZNAME _IOR(0x12,125,char[ZFS_MAXNAMELEN])
/*
* Internal SPA load state. Used by FMA diagnosis engine.