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Use local variable to read zp->z_mode

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When accessing the zp->z_mode through the SA bulk interface we
expect that 64-bits are available to hold the result.  However,
on 32-bit platforms mode_t will only be 32-bits so we cannot
pass it to SA_ADD_BULK_ATTR().  Instead a local uint64_t variable
must be used and the result assigned to zp->z_mode.

This went unnoticed on 32-bit little endian platforms because
the bytes happen to end up in the correct 32-bits.  But on big
endian platforms like Sparc the zp->z_mode will always end up
set to zero.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ned Bass <bass6@llnl.gov>
Signed-off-by: marku89 <mar42@kola.li>
Issue #1700
This commit is contained in:
Brian Behlendorf
2014-01-07 23:16:46 +01:00
parent d7ec8d4fd9
commit 7f89ae6ba0
2 changed files with 5 additions and 2 deletions
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include/sys/zfs_znode.h
+1 -1
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@@ -205,8 +205,8 @@ typedef struct znode {
uint64_t z_pflags; /* pflags (cached) */
uint64_t z_uid; /* uid fuid (cached) */
uint64_t z_gid; /* gid fuid (cached) */
mode_t z_mode; /* mode (cached) */
uint32_t z_sync_cnt; /* synchronous open count */
mode_t z_mode; /* mode (cached) */
kmutex_t z_acl_lock; /* acl data lock */
zfs_acl_t *z_acl_cached; /* cached acl */
krwlock_t z_xattr_lock; /* xattr data lock */