Differential D25910 Diff 75287 sys/fs/tmpfs/tmpfs_vnops.c

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sys/fs/tmpfs/tmpfs_vnops.c

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#include <sys/proc.h>		#include <sys/proc.h>
#include <sys/rwlock.h>		#include <sys/rwlock.h>
#include <sys/sched.h>		#include <sys/sched.h>
#include <sys/stat.h>		#include <sys/stat.h>
#include <sys/sysctl.h>		#include <sys/sysctl.h>
#include <sys/unistd.h>		#include <sys/unistd.h>
#include <sys/vnode.h>		#include <sys/vnode.h>
#include <sys/smr.h>		#include <sys/smr.h>
		#include <security/audit/audit.h>
		#include <security/mac/mac_framework.h>

#include <vm/vm.h>		#include <vm/vm.h>
#include <vm/vm_param.h>		#include <vm/vm_param.h>
#include <vm/vm_object.h>		#include <vm/vm_object.h>

#include <fs/tmpfs/tmpfs_vnops.h>		#include <fs/tmpfs/tmpfs_vnops.h>
#include <fs/tmpfs/tmpfs.h>		#include <fs/tmpfs/tmpfs.h>

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out:		out:
MPASS(VOP_ISLOCKED(vp));		MPASS(VOP_ISLOCKED(vp));

return error;		return error;
}		}

int		int
		tmpfs_stat(struct vop_stat_args *v)
		{
		struct vnode *vp = v->a_vp;
		struct stat *sb = v->a_sb;
		vm_object_t obj;
		struct tmpfs_node *node;
		int error;

		node = VP_TO_TMPFS_NODE(vp);

		tmpfs_update_getattr(vp);

		error = vop_stat_helper_pre(v);
		if (__predict_false(error))
		return (error);

		sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0];
		sb->st_ino = node->tn_id;
		sb->st_mode = node->tn_mode \| VTTOIF(vp->v_type);
		sb->st_nlink = node->tn_links;
		sb->st_uid = node->tn_uid;
		sb->st_gid = node->tn_gid;
		sb->st_rdev = (vp->v_type == VBLK \|\| vp->v_type == VCHR) ?
		node->tn_rdev : NODEV;
		sb->st_size = node->tn_size;
		sb->st_atim.tv_sec = node->tn_atime.tv_sec;
		sb->st_atim.tv_nsec = node->tn_atime.tv_nsec;
		sb->st_mtim.tv_sec = node->tn_mtime.tv_sec;
		sb->st_mtim.tv_nsec = node->tn_mtime.tv_nsec;
		sb->st_ctim.tv_sec = node->tn_ctime.tv_sec;
		sb->st_ctim.tv_nsec = node->tn_ctime.tv_nsec;
		sb->st_birthtim.tv_sec = node->tn_birthtime.tv_sec;
		sb->st_birthtim.tv_nsec = node->tn_birthtime.tv_nsec;
		sb->st_blksize = PAGE_SIZE;
		sb->st_flags = node->tn_flags;
		sb->st_gen = 0;
		if (vp->v_type == VREG) {
		obj = node->tn_reg.tn_aobj;
		sb->st_blocks = (u_quad_t)obj->resident_page_count * PAGE_SIZE;
		} else
		sb->st_blocks = node->tn_size;
		sb->st_blocks /= S_BLKSIZE;
		return (vop_stat_helper_post(v, error));
		}

		int
tmpfs_getattr(struct vop_getattr_args *v)		tmpfs_getattr(struct vop_getattr_args *v)
		kibUnsubmitted Not Done Inline Actions Can we avoid having fs to implement both VOP_STAT and VOP_GETATTR if it wants to provide STAT ? kib: Can we avoid having fs to implement both VOP_STAT and VOP_GETATTR if it wants to provide STAT ?
		mjgAuthorUnsubmitted Done Inline Actions Not right now unfortunately. GETATTR itself is cheaper to execute and called all the time (e.g., mmap). Most consumers are only looking to get the file size though and other cheaply obtainable subset. I had a WIP patch to implement a stripped down GETATTR which provides only what's needed by mmap/exec/lseek/sendfile. With that in place GETATTR itself would be rare enough that we could retire it and indeed create a wrapper around stat. mjg: Not right now unfortunately. GETATTR itself is cheaper to execute and called all the time (e.g.
{		{
struct vnode *vp = v->a_vp;		struct vnode *vp = v->a_vp;
struct vattr *vap = v->a_vap;		struct vattr *vap = v->a_vap;
vm_object_t obj;		vm_object_t obj;
struct tmpfs_node *node;		struct tmpfs_node *node;

node = VP_TO_TMPFS_NODE(vp);		node = VP_TO_TMPFS_NODE(vp);

▲ Show 20 Lines • Show All 1,252 Lines • ▼ Show 20 Lines	struct vop_vector tmpfs_vnodeop_entries = {
.vop_lookup = vfs_cache_lookup,		.vop_lookup = vfs_cache_lookup,
.vop_cachedlookup = tmpfs_cached_lookup,		.vop_cachedlookup = tmpfs_cached_lookup,
.vop_create = tmpfs_create,		.vop_create = tmpfs_create,
.vop_mknod = tmpfs_mknod,		.vop_mknod = tmpfs_mknod,
.vop_open = tmpfs_open,		.vop_open = tmpfs_open,
.vop_close = tmpfs_close,		.vop_close = tmpfs_close,
.vop_fplookup_vexec = tmpfs_fplookup_vexec,		.vop_fplookup_vexec = tmpfs_fplookup_vexec,
.vop_access = tmpfs_access,		.vop_access = tmpfs_access,
		.vop_stat = tmpfs_stat,
.vop_getattr = tmpfs_getattr,		.vop_getattr = tmpfs_getattr,
.vop_setattr = tmpfs_setattr,		.vop_setattr = tmpfs_setattr,
.vop_read = tmpfs_read,		.vop_read = tmpfs_read,
.vop_write = tmpfs_write,		.vop_write = tmpfs_write,
.vop_fsync = tmpfs_fsync,		.vop_fsync = tmpfs_fsync,
.vop_remove = tmpfs_remove,		.vop_remove = tmpfs_remove,
.vop_link = tmpfs_link,		.vop_link = tmpfs_link,
.vop_rename = tmpfs_rename,		.vop_rename = tmpfs_rename,
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