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sys/fs/tmpfs/tmpfs_vfsops.c
| Show All 38 Lines | ||||||||||
| * sub-system to store file data and metadata in an efficient way. | * sub-system to store file data and metadata in an efficient way. | |||||||||
| * This means that it does not follow the structure of an on-disk file | * This means that it does not follow the structure of an on-disk file | |||||||||
| * system because it simply does not need to. Instead, it uses | * system because it simply does not need to. Instead, it uses | |||||||||
| * memory-specific data structures and algorithms to automatically | * memory-specific data structures and algorithms to automatically | |||||||||
| * allocate and release resources. | * allocate and release resources. | |||||||||
| */ | */ | |||||||||
| #include "opt_tmpfs.h" | #include "opt_tmpfs.h" | |||||||||
| #include "opt_ddb.h" | ||||||||||
markj: opt_ddb.h should be included first. | ||||||||||
| #include <sys/cdefs.h> | #include <sys/cdefs.h> | |||||||||
| __FBSDID("$FreeBSD$"); | __FBSDID("$FreeBSD$"); | |||||||||
| #include <sys/param.h> | #include <sys/param.h> | |||||||||
| #include <sys/systm.h> | #include <sys/systm.h> | |||||||||
| #include <sys/dirent.h> | #include <sys/dirent.h> | |||||||||
| #include <sys/file.h> | #include <sys/file.h> | |||||||||
| ▲ Show 20 Lines • Show All 185 Lines • ▼ Show 20 Lines | VM_MAP_ENTRY_FOREACH(entry, map) { | |||||||||
| VM_OBJECT_RUNLOCK(object); | VM_OBJECT_RUNLOCK(object); | |||||||||
| continue; | continue; | |||||||||
| } | } | |||||||||
| MPASS(object->ref_count > 1); | MPASS(object->ref_count > 1); | |||||||||
| if ((object->flags & OBJ_TMPFS) == 0) { | if ((object->flags & OBJ_TMPFS) == 0) { | |||||||||
| VM_OBJECT_RUNLOCK(object); | VM_OBJECT_RUNLOCK(object); | |||||||||
| continue; | continue; | |||||||||
| } | } | |||||||||
| vp = object->un_pager.swp.swp_tmpfs; | vp = VM_TO_TMPFS_VP(object); | |||||||||
| if (vp->v_mount != mp) { | if (vp->v_mount != mp) { | |||||||||
| VM_OBJECT_RUNLOCK(object); | VM_OBJECT_RUNLOCK(object); | |||||||||
| continue; | continue; | |||||||||
| } | } | |||||||||
| terminate = cb(mp, map, entry, cb_arg); | terminate = cb(mp, map, entry, cb_arg); | |||||||||
| VM_OBJECT_RUNLOCK(object); | VM_OBJECT_RUNLOCK(object); | |||||||||
| if (terminate) | if (terminate) | |||||||||
| ▲ Show 20 Lines • Show All 294 Lines • ▼ Show 20 Lines | tmpfs_free_tmp(struct tmpfs_mount *tmp) | |||||||||
| tmp->tm_refcount--; | tmp->tm_refcount--; | |||||||||
| if (tmp->tm_refcount > 0) { | if (tmp->tm_refcount > 0) { | |||||||||
| TMPFS_UNLOCK(tmp); | TMPFS_UNLOCK(tmp); | |||||||||
| return; | return; | |||||||||
| } | } | |||||||||
| TMPFS_UNLOCK(tmp); | TMPFS_UNLOCK(tmp); | |||||||||
| mtx_destroy(&tmp->tm_allnode_lock); | mtx_destroy(&tmp->tm_allnode_lock); | |||||||||
| MPASS(tmp->tm_pages_used == 0); | /* | |||||||||
| * We cannot assert that tmp->tm_pages_used == 0 there, | ||||||||||
| * because tmpfs vm_objects might be still mapped by some | ||||||||||
| * process and outlive the mount due to reference counting. | ||||||||||
| */ | ||||||||||
| MPASS(tmp->tm_nodes_inuse == 0); | MPASS(tmp->tm_nodes_inuse == 0); | |||||||||
| free(tmp, M_TMPFSMNT); | free(tmp, M_TMPFSMNT); | |||||||||
| } | } | |||||||||
| static int | static int | |||||||||
| tmpfs_root(struct mount *mp, int flags, struct vnode **vpp) | tmpfs_root(struct mount *mp, int flags, struct vnode **vpp) | |||||||||
| { | { | |||||||||
| ▲ Show 20 Lines • Show All 123 Lines • ▼ Show 20 Lines | struct vfsops tmpfs_vfsops = { | |||||||||
| .vfs_cachedroot = tmpfs_root, | .vfs_cachedroot = tmpfs_root, | |||||||||
| .vfs_statfs = tmpfs_statfs, | .vfs_statfs = tmpfs_statfs, | |||||||||
| .vfs_fhtovp = tmpfs_fhtovp, | .vfs_fhtovp = tmpfs_fhtovp, | |||||||||
| .vfs_sync = tmpfs_sync, | .vfs_sync = tmpfs_sync, | |||||||||
| .vfs_init = tmpfs_init, | .vfs_init = tmpfs_init, | |||||||||
| .vfs_uninit = tmpfs_uninit, | .vfs_uninit = tmpfs_uninit, | |||||||||
| }; | }; | |||||||||
| VFS_SET(tmpfs_vfsops, tmpfs, VFCF_JAIL); | VFS_SET(tmpfs_vfsops, tmpfs, VFCF_JAIL); | |||||||||
| #ifdef DDB | ||||||||||
Done Inline Actions
markj: | ||||||||||
| #include <ddb/ddb.h> | ||||||||||
| static void | ||||||||||
| db_print_tmpfs(struct mount *mp, struct tmpfs_mount *tmp) | ||||||||||
| { | ||||||||||
| db_printf("mp %p (%s) tmp %p\n", mp, | ||||||||||
| mp->mnt_stat.f_mntonname, tmp); | ||||||||||
| db_printf( | ||||||||||
| "\tsize max %ju pages max %lu pages used %lu\n" | ||||||||||
| "\tinodes max %ju inodes inuse %ju refcount %ju\n" | ||||||||||
| "\tmaxfilesize %ju r%c %snamecache %smtime\n", | ||||||||||
| (uintmax_t)tmp->tm_size_max, tmp->tm_pages_max, tmp->tm_pages_used, | ||||||||||
| (uintmax_t)tmp->tm_nodes_max, (uintmax_t)tmp->tm_nodes_inuse, | ||||||||||
| (uintmax_t)tmp->tm_refcount, (uintmax_t)tmp->tm_maxfilesize, | ||||||||||
| tmp->tm_ronly ? 'o' : 'w', tmp->tm_nonc ? "no" : "", | ||||||||||
| tmp->tm_nomtime ? "no" : ""); | ||||||||||
| } | ||||||||||
| DB_SHOW_COMMAND(tmpfs, db_show_tmpfs) | ||||||||||
| { | ||||||||||
| struct mount *mp; | ||||||||||
| struct tmpfs_mount *tmp; | ||||||||||
| if (have_addr) { | ||||||||||
| mp = (struct mount *)addr; | ||||||||||
| tmp = VFS_TO_TMPFS(mp); | ||||||||||
| db_print_tmpfs(mp, tmp); | ||||||||||
| return; | ||||||||||
| } | ||||||||||
| TAILQ_FOREACH(mp, &mountlist, mnt_list) { | ||||||||||
| if (strcmp(mp->mnt_stat.f_fstypename, tmpfs_vfsconf.vfc_name) == | ||||||||||
| 0) { | ||||||||||
| tmp = VFS_TO_TMPFS(mp); | ||||||||||
| db_print_tmpfs(mp, tmp); | ||||||||||
| } | ||||||||||
| } | ||||||||||
| } | ||||||||||
| #endif /* DDB */ | ||||||||||
opt_ddb.h should be included first.