mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
38be7a79f7
open(2) must always include one of O_RDONLY, O_WRONLY, or O_RDWR. No need for any O_APPEND special case. Passing O_WRONLY|O_RDWR is undefined according to the man page, but the Linux VFS interprets this as O_RDWR, so we'll do the same. This fixes open(2) with flags O_RDWR|O_APPEND, which was incorrectly being translated to readonly. Reported-by: Fyodor Ustinov <ufm@ufm.su> Signed-off-by: Sage Weil <sage@newdream.net>
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
/*
|
|
* Some non-inline ceph helpers
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/ceph/types.h>
|
|
|
|
/*
|
|
* return true if @layout appears to be valid
|
|
*/
|
|
int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
|
|
{
|
|
__u32 su = le32_to_cpu(layout->fl_stripe_unit);
|
|
__u32 sc = le32_to_cpu(layout->fl_stripe_count);
|
|
__u32 os = le32_to_cpu(layout->fl_object_size);
|
|
|
|
/* stripe unit, object size must be non-zero, 64k increment */
|
|
if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))
|
|
return 0;
|
|
if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))
|
|
return 0;
|
|
/* object size must be a multiple of stripe unit */
|
|
if (os < su || os % su)
|
|
return 0;
|
|
/* stripe count must be non-zero */
|
|
if (!sc)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
|
|
int ceph_flags_to_mode(int flags)
|
|
{
|
|
int mode;
|
|
|
|
#ifdef O_DIRECTORY /* fixme */
|
|
if ((flags & O_DIRECTORY) == O_DIRECTORY)
|
|
return CEPH_FILE_MODE_PIN;
|
|
#endif
|
|
|
|
switch (flags & O_ACCMODE) {
|
|
case O_WRONLY:
|
|
mode = CEPH_FILE_MODE_WR;
|
|
break;
|
|
case O_RDONLY:
|
|
mode = CEPH_FILE_MODE_RD;
|
|
break;
|
|
case O_RDWR:
|
|
case O_ACCMODE: /* this is what the VFS does */
|
|
mode = CEPH_FILE_MODE_RDWR;
|
|
break;
|
|
}
|
|
#ifdef O_LAZY
|
|
if (flags & O_LAZY)
|
|
mode |= CEPH_FILE_MODE_LAZY;
|
|
#endif
|
|
|
|
return mode;
|
|
}
|
|
EXPORT_SYMBOL(ceph_flags_to_mode);
|
|
|
|
int ceph_caps_for_mode(int mode)
|
|
{
|
|
int caps = CEPH_CAP_PIN;
|
|
|
|
if (mode & CEPH_FILE_MODE_RD)
|
|
caps |= CEPH_CAP_FILE_SHARED |
|
|
CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
|
|
if (mode & CEPH_FILE_MODE_WR)
|
|
caps |= CEPH_CAP_FILE_EXCL |
|
|
CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
|
|
CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
|
|
CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
|
|
if (mode & CEPH_FILE_MODE_LAZY)
|
|
caps |= CEPH_CAP_FILE_LAZYIO;
|
|
|
|
return caps;
|
|
}
|
|
EXPORT_SYMBOL(ceph_caps_for_mode);
|