typedef struct zfs_sb {
struct super_block *z_sb; /* generic super_block */
+ struct backing_dev_info z_bdi; /* generic backing dev info */
struct zfs_sb *z_parent; /* parent fs */
objset_t *z_os; /* objset reference */
uint64_t z_flags; /* super_block flags */
boolean_t z_unmounted; /* unmounted */
rrwlock_t z_teardown_lock;
krwlock_t z_teardown_inactive_lock;
- list_t z_all_znodes; /* all vnodes in the fs */
+ list_t z_all_znodes; /* all znodes in the fs */
+ uint64_t z_nr_znodes; /* number of znodes in the fs */
kmutex_t z_znodes_lock; /* lock for z_all_znodes */
struct inode *z_ctldir; /* .zfs directory inode */
+ avl_tree_t z_ctldir_snaps; /* .zfs/snapshot entries */
+ kmutex_t z_ctldir_lock; /* .zfs ctldir lock */
boolean_t z_show_ctldir; /* expose .zfs in the root dir */
boolean_t z_issnap; /* true if this is a snapshot */
boolean_t z_vscan; /* virus scan on/off */
boolean_t z_use_fuids; /* version allows fuids */
boolean_t z_replay; /* set during ZIL replay */
boolean_t z_use_sa; /* version allow system attributes */
+ boolean_t z_xattr_sa; /* allow xattrs to be stores as SA */
uint64_t z_version; /* ZPL version */
uint64_t z_shares_dir; /* hidden shares dir */
kmutex_t z_lock;
#define ZSB_XATTR 0x0001 /* Enable user xattrs */
-
-/*
- * Minimal snapshot helpers, the bulk of the Linux snapshot implementation
- * lives in the zpl_snap.c file which is part of the zpl source.
- */
-#define ZFS_CTLDIR_NAME ".zfs"
-
-#define zfs_has_ctldir(zdp) \
- ((zdp)->z_id == ZTOZSB(zdp)->z_root && \
- (ZTOZSB(zdp)->z_ctldir != NULL))
-#define zfs_show_ctldir(zdp) \
- (zfs_has_ctldir(zdp) && \
- (ZTOZSB(zdp)->z_show_ctldir))
-
-#define ZFSCTL_INO_ROOT 0x1
-#define ZFSCTL_INO_SNAPDIR 0x2
-#define ZFSCTL_INO_SHARES 0x3
-
/*
* Allow a maximum number of links. While ZFS does not internally limit
- * this most Linux filesystems do. It's probably a good idea to limit
- * this to a large value until it is validated that this is safe.
+ * this the inode->i_nlink member is defined as an unsigned int. To be
+ * safe we use 2^31-1 as the limit.
*/
-#define ZFS_LINK_MAX 65536
+#define ZFS_LINK_MAX ((1U << 31) - 1U)
/*
* Normal filesystems (those not under .zfs/snapshot) have a total
extern boolean_t zfs_fuid_overquota(zfs_sb_t *zsb, boolean_t isgroup,
uint64_t fuid);
extern int zfs_set_version(zfs_sb_t *zsb, uint64_t newvers);
+extern int zfs_get_zplprop(objset_t *os, zfs_prop_t prop,
+ uint64_t *value);
extern int zfs_sb_create(const char *name, zfs_sb_t **zsbp);
+extern int zfs_sb_setup(zfs_sb_t *zsb, boolean_t mounting);
extern void zfs_sb_free(zfs_sb_t *zsb);
+extern int zfs_sb_prune(struct super_block *sb, unsigned long nr_to_scan,
+ int *objects);
+extern int zfs_sb_teardown(zfs_sb_t *zsb, boolean_t unmounting);
extern int zfs_check_global_label(const char *dsname, const char *hexsl);
extern boolean_t zfs_is_readonly(zfs_sb_t *zsb);
extern int zfs_register_callbacks(zfs_sb_t *zsb);
extern void zfs_unregister_callbacks(zfs_sb_t *zsb);
extern int zfs_domount(struct super_block *sb, void *data, int silent);
+extern void zfs_preumount(struct super_block *sb);
extern int zfs_umount(struct super_block *sb);
extern int zfs_remount(struct super_block *sb, int *flags, char *data);
extern int zfs_root(zfs_sb_t *zsb, struct inode **ipp);