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Merge branch 'linux-user-disk' into refs/top-bases/linux-zfs-branch

This commit is contained in:
Brian Behlendorf 2010-03-10 12:09:32 -08:00
parent 9c0d97face 2c79a2fa6a
commit c7c19c1259
1 changed files with 25 additions and 4 deletions
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29
lib/libzpool/kernel.c
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@ -37,6 +37,7 @@
#include <sys/zfs_context.h>
#include <sys/utsname.h>
#include <sys/time.h>
#include <sys/mount.h> /* for BLKGETSIZE64 */
#include <sys/systeminfo.h>
/*
@ -552,13 +553,13 @@ vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3)
return (errno);
}
#ifdef __linux__
if (!(flags & FCREAT) && S_ISBLK(st.st_mode)) {
#ifdef __linux__
flags |= O_DIRECT;
if (flags & FWRITE)
flags |= O_EXCL;
}
#endif
/* We shouldn't be writing to block devices in userspace */
VERIFY(!(flags & FWRITE));
}
if (flags & FCREAT)
old_umask = umask(0);
@ -581,6 +582,16 @@ vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3)
return (err);
}
#ifdef __linux__
/* In Linux, use an ioctl to get the size of a block device. */
if (S_ISBLK(st.st_mode)) {
if (ioctl(fd, BLKGETSIZE64, &st.st_size) != 0) {
err = errno;
close(fd);
return (err);
}
}
#endif
(void) fcntl(fd, F_SETFD, FD_CLOEXEC);
*vpp = vp = umem_zalloc(sizeof (vnode_t), UMEM_NOFAIL);
@ -634,6 +645,16 @@ vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset,
}
}
#ifdef __linux__
if (rc == -1 && errno == EINVAL) {
/*
* Under Linux, this most likely means an alignment issue
* (memory or disk) due to O_DIRECT, so we abort() in order to
* catch the offender.
*/
abort();
}
#endif
if (rc == -1)
return (errno);