c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-25 03:37:45 +03:00
Code Issues Packages Projects Releases Wiki Activity

Add linux kernel device support

Browse Source 
This branch contains the majority of the changes required to cleanly
intergrate with Linux style special devices (/dev/zfs).  Mainly this
means dropping all the Solaris style callbacks and replacing them
with the Linux equivilants.

This patch also adds the onexit infrastructure needed to track
some minimal state between ioctls.  Under Linux it would be easy
to do this simply using the file->private_data.  But under Solaris
they apparent need to pass the file descriptor as part of the ioctl
data and then perform a lookup in the kernel.  Once again to keep
code change to a minimum I've implemented the Solaris solution.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
2010-08-26 11:44:39 -07:00
parent 47d0ed1e6f
commit 325f023544
8 changed files with 798 additions and 257 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/include/sys/zfs_ioctl.h
+13 -19
View File
@@ -312,8 +312,6 @@ typedef struct zfs_creat {
nvlist_t *zct_props;
} zfs_creat_t;
extern dev_info_t *zfs_dip;
extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
extern int zfs_secpolicy_rename_perms(const char *from,
const char *to, cred_t *cr);
@@ -321,28 +319,24 @@ extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
extern int zfs_busy(void);
extern int zfs_unmount_snap(const char *, void *);
/*
* ZFS minor numbers can refer to either a control device instance or
* a zvol. Depending on the value of zss_type, zss_data points to either
* a zvol_state_t or a zfs_onexit_t.
*/
enum zfs_soft_state_type {
ZSST_ZVOL,
ZSST_CTLDEV
enum zfsdev_state_type {
ZST_ONEXIT,
ZST_ZEVENT,
ZST_ALL,
};
typedef struct zfs_soft_state {
enum zfs_soft_state_type zss_type;
void *zss_data;
} zfs_soft_state_t;
typedef struct zfsdev_state {
list_node_t zs_next; /* next zfsdev_state_t link */
struct file *zs_file; /* associated file struct */
minor_t zs_minor; /* made up minor number */
void *zs_onexit; /* onexit data */
void *zs_zevent; /* zevent data */
} zfsdev_state_t;
extern void *zfsdev_get_soft_state(minor_t minor,
enum zfs_soft_state_type which);
extern void *zfsdev_get_state(minor_t minor, enum zfsdev_state_type which);
extern minor_t zfsdev_getminor(struct file *filp);
extern minor_t zfsdev_minor_alloc(void);
extern void *zfsdev_state;
extern kmutex_t zfsdev_state_lock;
#endif /* _KERNEL */
#ifdef __cplusplus