| Age | Commit message (Collapse) | Author |
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The delayed copy actually needs write access.
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See
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3980bd3b406addb327d858aebd19e229ea340b9a
This supports setting (and reading) of passive trasnlators from
GNU/Linux, e.g.
dd if=/dev/zero of=file bs=1k count=1000
losetup /dev/loop0 file
mke2fs -t ext2 -o hurd -O ext_attr /dev/loop0
mount -t ext2 -o x-xattr-translator-records /dev/loop0 /mnt
mkdir -p /mnt/servers/socket
touch /mnt/servers/socket/1
setfattr --name=gnu.translator --value='"/hurd/pflocal\0"' /mnt/servers/socket/1
getfattr --name=gnu.translator /mnt/servers/socket/1
# file: 1
gnu.translator="/hurd/pflocal"
* ext2fs/xattr.c (xattr_prefixes): For "gnu.*", use index for
the Hurd (10).
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which will be the default in gcc-10.
* acpi/acpifs.h (fs, acpifs_maptime): Add extern qualifier.
* boot/private.h (verbose): Likewise.
* eth-multiplexer/netfs_impl.h (multiplexer_maptime): Likewise.
* eth-multiplexer/vdev.h (port_bucket, vdev_portclass): Likewise.
* exec/priv.h (port_bucket, execboot_portclass): Likewise.
* ext2fs/ext2fs.h (sblock, sblock_dirty, block_size, log2_block_size,
log2_dev_blocks_per_fs_block, log2_stat_blocks_per_fs_block,
zeroblock, frag_size, frags_per_block, inodes_per_block,
itb_per_group, db_per_group, desc_per_block, addr_per_block,
groups_count, node_to_page_lock, generation_lock, next_generation,
group_desc_image, global_pokel, modified_global_blocks,
use_xattr_translator_records): Likewise.
* hostmux/hostmux.h (hostmux_maptime): Likewise.
* isofs/isofs.h (host_name, mounted_on, disk_image, disk_image_len,
logical_block_size, sblock): Likewise.
* libdiskfs/diskfs.h (diskfs_shortcut_symlink, diskfs_shortcut_chrdev,
diskfs_shortcut_blkdev, diskfs_shortcut_fifo, diskfs_shortcut_ifsock,
diskfs_create_symlink_hook, diskfs_read_symlink_hook): Likewise.
* libnetfs/callbacks.h (_netfs_translator_callback1,
_netfs_translator_callback2): Likewise.
* libnetfs/priv.h (netfs_mtime): Likewise.
* libpager/priv.h (_pager_class): Likewise.
* libtrivfs/trivfs.h (trivfs_check_access_hook, trivfs_check_open_hook,
trivfs_open_hook, trivfs_protid_create_hook, trivfs_peropen_create_hook,
trivfs_protid_destroy_hook, trivfs_peropen_destroy_hook,
trivfs_getroot_hook): Likewise.
* lwip/lwip-hurd.h (lwip_bucket, socketport_class, addrport_class,
shutdown_notify_class, lwip_protid_portclasses, lwip_cntl_portclasses,
lwip_bootstrap_portclass, fsys_identity, lwipcntl, lwip_owner,
lwip_group): Likewise.
* lwip/port/include/netif/hurdtunif.h (tunnel_cntlclass, tunnel_class):
Likewise.
* nfs/nfs.h (main_udp_socket, hostname, mapped_time): Likewise.
* nfsd/nfsd.h (mapped_time, authserver): Likewise.
* pci-arbiter/pcifs.h (fs, pcifs_maptime): Likewise.
* pci-arbiter/startup.h (pci_shutdown_notify_class,
arrange_shutdown_notification): Likewise.
* pfinet/pfinet.h (pfinet_bucket, addrport_class, socketport_class,
fsys_identity, pfinetctl, pfinet_owner, pfinet_group): Likewise.
* pflocal/sserver.h (sock_port_bucket): Likewise.
* proc/proc.h (authserver, self_proc, init_proc, startup_proc, proc_bucket,
proc_class, generic_port_class, exc_class, generic_port, kernel_proc,
global_lock): Likewise.
* term/term.h (termstate, termflags, global_lock, carrier_alert,
select_alert, pty_select_alert, term_bucket, tty_cntl_class,
tty_class, cttyid_class, pty_class, pty_cntl_class, termctl, ptyctl,
inputq, rawq, outputq, remote_input_mode, external_processing,
term_owner, term_group, term_mode, bottom): Likewise.
* usermux/usermux.h (usermux_maptime): Likewise.
* utils/msgids.h (msgid_argp): Likewise.
* libdiskfs/priv.h (_diskfs_mtime): Remove definition.
* lwip/options.h (lwip_argp): Add prototype.
* mach-defpager/priv.h (partitions): Name structure.
(all_partitions): Add extern qualifier.
* acpi/main.c (acpifs_maptime, fs): New variables.
* exec/main.c (port_bucket, execboot_portclass): Likewise.
* ext2fs/ext2fs.c (sblock, sblock_dirty, block_size, log2_block_size,
log2_dev_blocks_per_fs_block, log2_stat_blocks_per_fs_block,
frag_size, frags_per_block, inodes_per_block, itb_per_group,
db_per_group, desc_per_block, addr_per_block, groups_count,
next_generation, group_desc_image, global_pokel,
use_xattr_translator_records): Likewise.
* isofs/main.c (host_name, mounted_on, logical_block_size, sblock):
Likewise.
* libpager/pager-create.c (_pager_class): Likewise.
* lwip/port/netif/hurdtunif.c (tunnel_cntlclass, tunnel_class):
Likewise.
* mach-defpager/default_pager.c (all_partitions): Likewise.
* nfs/main.c (main_udp_socket, hostname, mapped_time): Likewise.
* nfsd/main.c (mapped_time, authserver): Likewise.
* pci-arbiter/main.c (fs, pcifs_maptime): Likewise.
* pci-arbiter/startup.c (*pci_shutdown_notify_class): Likewise.
* pfinet/main.c (pfinetctl, pfinet_owner, pfinet_group, pfinet_bucket,
addrport_class, socketport_class, fsys_identity): Likewise.
* proc/main.c (authserver, self_proc, init_proc, startup_proc,
proc_bucket, proc_class, generic_port_class, exc_class, generic_port,
kernel_proc, global_lock): Likewise.
* term/main.c (termstate, termflags, global_lock, carrier_alert,
select_alert, pty_select_alert, term_bucket, tty_cntl_class,
tty_class, cttyid_class, pty_class, pty_cntl_class, termctl, ptyctl,
outputq, remote_input_mode, external_processing, term_owner,
term_group, term_mode, bottom): Likewise.
* usermux/usermux.c (usermux_mapped_time): Rename to usermux_maptime.
* lwip/main.c: Include "options.h".
(lwip_argp, netif_list): Remove declarations.
(lwip_bucket, socketport_class, addrport_class, shutdown_notify_class,
lwip_cntl_portclasses, lwip_bootstrap_portclass, lwip_owner, lwip_group,
fsys_identity, lwipcntl): New variables.
* eth-multiplexer/multiplexer.c (multiplexer_maptime): Add variable.
* hostmux/hostmux.c (hostmux_mapped_time): Rename variable to hostmux_maptime
* libdiskfs/extra-version.c: Rename file to...
* libdiskfs/priv.c: ... new file.
(diskfs_shortcut_symlink, diskfs_shortcut_chrdev,
diskfs_shortcut_blkdev, diskfs_shortcut_fifo, diskfs_shortcut_ifsock,
diskfs_create_symlink_hook, diskfs_read_symlink_hook): Add weak
variables.
* libdiskfs/Makefile (OTHERSRCS): Replace extra-version.c with priv.c.
* libtrivfs/priv.c: New file.
* libtrivfs/Makefile (OTHERSRCS): Add priv.c
* libcons/extra-version.c: Rename file to...
* libcons/priv.c: ... new file.
* libcons/Makefile (SRCS): Replace extra-version.c with priv.c.
Fix build with #
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linux seems to allocate 8 blocks for any fast symlink.
* ext2fs/inode.c (write_symlink): Do not assert that st_blocks is 0.
(read_symlink): Return EINVAL when node->dn_stat.st_size >=
MAX_INODE_SYMLINK, not when node->dn_stat.st_blocks != 0.
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* boot/boot.c: Replace char* with data_t.
* console-client/trans.c: Likewise.
* exec/exec.c: Likewise.
* ext2fs/storeinfo.c: Likewise.
* fatfs/inode.c: Likewise.
* fatfs/main.c: Likewise.
* isofs/inode.c: Likewise.
* libdiskfs/boot-start.c: Likewise.
* libdiskfs/dir-readdir.c: Likewise.
* libdiskfs/file-exec.c: Likewise.
* libdiskfs/file-get-fs-opts.c: Likewise.
* libdiskfs/file-get-trans.c: Likewise.
* libdiskfs/file-getfh.c: Likewise.
* libdiskfs/file-set-trans.c: Likewise.
* libdiskfs/fsys-forward.c: Likewise.
* libdiskfs/fsys-getfile.c: Likewise.
* libdiskfs/fsys-options.c: Likewise.
* libdiskfs/io-read.c: Likewise.
* libdiskfs/io-write.c: Likewise.
* libnetfs/dir-readdir.c: Likewise.
* libnetfs/file-exec.c: Likewise.
* libnetfs/file-get-fs-options.c: Likewise.
* libnetfs/file-get-storage-info.c: Likewise.
* libnetfs/file-get-translator.c: Likewise.
* libnetfs/file-set-translator.c: Likewise.
* libnetfs/fsstubs.c: Likewise.
* libnetfs/fsys-get-options.c: Likewise.
* libnetfs/fsys-set-options.c: Likewise.
* libnetfs/fsysstubs.c: Likewise.
* libnetfs/io-read.c: Likewise.
* libnetfs/io-write.c: Likewise.
* libtrivfs/dir-readdir.c: Likewise.
* libtrivfs/file-get-fs-options.c: Likewise.
* libtrivfs/file-get-storage-info.c: Likewise.
* libtrivfs/file-get-trans.c: Likewise.
* libtrivfs/file-getfh.c: Likewise.
* libtrivfs/file-set-trans.c: Likewise.
* libtrivfs/fsys-forward.c: Likewise.
* libtrivfs/fsys-get-options.c: Likewise.
* libtrivfs/fsys-set-options.c: Likewise.
* libtrivfs/fsys-stubs.c: Likewise.
* libtrivfs/io-read.c: Likewise.
* libtrivfs/io-write.c: Likewise.
* pfinet/io-ops.c: Likewise.
* pfinet/pfinet-ops.c: Likewise.
* pfinet/socket-ops.c: Likewise.
* pfinet/tunnel.c: Likewise.
* pflocal/io.c: Likewise.
* pflocal/pf.c: Likewise.
* pflocal/socket.c: Likewise.
* proc/info.c: Likewise.
* startup/startup.c: Likewise.
* storeio/io.c: Likewise.
* term/users.c: Likewise.
* tmpfs/node.c: Likewise.
* trans/crash.c: Likewise.
* trans/fakeroot.c: Likewise.
* trans/fifo.c: Likewise.
* trans/firmlink.c: Likewise.
* trans/hello-mt.c: Likewise.
* trans/hello.c: Likewise.
* trans/mtab.c: Likewise.
* trans/new-fifo.c: Likewise.
* trans/null.c: Likewise.
* trans/proxy-defpager.c: Likewise.
* trans/streamio.c: Likewise.
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* ext2fs/ext2fs.h: Add missing declarations needed when inlining is
disabled.
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* ext2fs/xattr.c (ext2_set_xattr): Initialize 'block'.
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Our variants print stack traces on failures. This will make locating
errors much easier.
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* ext2fs/truncate.c (force_delayed_copies): Fix typo.
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* ext2fs/xattr.c (ext2_free_xattr_block): Only warn about missing ext2fs
support in debugging mode.
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* ext2fs/xattr.c (ext2_list_xattr, ext2_get_xattr): Only warn about
missing ext2fs support in debugging mode.
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ext2fs/inode.c (diskfs_set_translator): Replace call to ext2_warning
with ext2_debug.
(diskfs_get_translator): Likewise.
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* ext2fs/xattr.c (ext2_get_xattr): Reset buffer size before each call
to xattr_entry_get.
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Fix some typos, types, add a few checks against integer overflows.
ext2fs/inode.c (diskfs_user_read_node): Initialize datalen to 0.
(diskfs_set_translator): Fix typo.
(diskfs_get_translator): Change datalen type to size_t.
* ext2fs/xattr.c (xattr_entry_get): Change type of block parameter
to void *.
(xattr_entry_create): Guard against integer overflows.
(xattr_entry_replace): Likewise.
(ext2_set_xattr): Fix typo.
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ext2fs/xattr.c (ext2_get_xattr): Keep the inode reference until the
block reference is done.
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* ext2fs/xattr.c (ext2_set_xattr): We allocate a block, but only
register it as the inodes acl block on success. Make sure to
deallocate the block otherwise.
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* ext2fs/xattr.c (ext2_set_xattr): Check returned block number before
mapping it.
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* ext2fs/ext2fs.c (use_xattr_translator_records): New variable.
(X_XATTR_TRANSLATOR_RECORDS): New macro.
(options): New option '--x-xattr-translator-records'.
(parse_opt): Handle new option.
* ext2fs/ext2fs.h (use_xattr_translator_records): New declaration.
* ext2fs/inode.c (diskfs_set_translator): Use new variable.
(diskfs_get_translator): Likewise.
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* ext2fs/inode.c (diskfs_user_read_node): Do not read translator
record on filesystems using Linux on-disk format. We pondered to use
this to introduce the feature, implementing it merely for Linux
filesystem.
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* ext2fs/xattr.c (ext2_set_xattr): Avoid allocating and leaking a
block if the caller tries to delete an extended attribute from a node
that has no extended attribute in the first place.
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* ext2fs/ext2fs.h (ext2_{list,get,set}_xattr): Use 'size_t'.
* ext2fs/xattr.c (xattr_entry_{list,get,create): Use 'size_t' where
appropriate.
(ext2_{list,get,set}_xattr): Likewise.
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* ext2fs/inode.c (diskfs_set_translator): Use xattr to store passive translator
if xattr is supported by filesystem.
(diskfs_get_translator): Read value of xattr key "gnu.translator" if it exists.
(diskfs_user_read_node): Set translator flag on reading.
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* ext2fs/Makefile (SRCS): Add xattr.c.
* ext2fs/ext2_fs.h: Define EXT2_FEATURE_COMPAT_EXT_ATTR.
* ext2fs/ext2fs.h: Add xattr functions.
* ext2fs/ialloc.c (diskfs_free_node): Free xattr block.
* ext2fs/xattr.c: xattr implement.
* ext2fs/xattr.h: Likewise.
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* ext2fs/dir.c (diskfs_direnter_hard): On missing room to extend
directory, return ENOSPC.
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* ext2fs/pager.c (pager_unlock_page): Do not say that ext2fs will crash
because of ENOSPC.
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* ext2fs/dir.c (diskfs_direnter_hard): Call hurd_safe_memset on
directory extension before using it, to actually reserve room.
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Thanks Agustina Arzille for the report
* ext2fs/ext2fs.h (global_lock, modified_global_blocks_lock): Declare
extern
* ext2fs/ext2fs.c (global_lock, modified_global_blocks_lock): Define and
initialize to PTHREAD_SPINLOCK_INITIALIZER.
* libtreefs/xinl.c (treefs_node_refcnt_lock): Likewise.
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* ext2fs/ext2fs.h (disk_cache_block_deref): Replace with a macro that
NULLs the given pointer.
(dino_deref): Likewise.
* ext2fs/pager.c (disk_cache_block_deref): Rename.
* ext2fs/pokel.c (pokel_add): Adapt.
(pokel_exec): Likewise.
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* ext2fs/ext2fs.h (sync_global_pointer): Rename 'bptr' so that it
doesn't collide with the macro 'bptr'.
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* ext2fs/ext2fs.c (options): Disable '--sblock', this has never been
implemented.
(parse_opt): Likewise.
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Add a variant to 'pager_create' that allocates memory for the user
hook next to the pager data increasing locality.
* console/pager.c (pager_clear_user_data): Fix type of 'idx', do not
free 'upi'.
(user_pager_create): Use the new function.
* doc/hurd.texi: Document new function.
* ext2fs/pager.c (pager_clear_user_data): Don't free 'upi'.
(diskfs_get_filemap): Use the new function.
* fatfs/pager.c (pager_clear_user_data): Don't free 'upi'.
(diskfs_get_filemap): Use the new function.
* isofs/pager.c (pager_clear_user_data): Don't free 'upi'.
(diskfs_get_filemap): Use the new function.
* libpager/pager-create.c (_pager_create): New generic allocation
function.
(pager_create): Use the new generic function.
(pager_create_alloc): New function.
* libpager/pager.h (pager_create_alloc): New prototype.
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Previously, pagers had no reference for being part of a node, only for
having a send right made for them. Hence we sometimes saw
use-after-free errors if the kernel did give up that send right,
typically while deleting files. Keep a weak reference as long as the
pager is referenced by a node.
* ext2fs/pager.c (pager_clear_user_data): Assert that 'pager' has been
NULLed.
(pager_dropweak): Drop the weak reference and NULL 'pager'.
(diskfs_get_filemap): Simplify. Acquire a weak reference.
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* ext2fs/inode.c (diskfs_user_read_node): When sizeof(off_t) >= 8, add
di->i_size_high as high-64bit part to st->st_size. Drop setting
unused info->i_high_size.
(write_node): When sizeof(off_t) >= 8, write high-64bit part of st->st_size
to di->i_size_high.
* ext2fs/ext2_fs_i.h (ext2_inode_info): Remove i_high_size field.
* pfinet/linux-src/include/linux/ext2_fs_i.h (ext2_inode_info): Likewise.
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* ext2fs/pager.c (disk_cache_init): Do not add
disk_cache_info[disk_cache_blocks] to disk_cache_info_free.
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* ext2fs/pager.c (disk_cache_info_free_push): Add prototype.
(disk_pager_notify_evict): When dropping DC_INCORE flag, if the
block becomes free (no reference and no DC_DONT_REUSE flags), call
disk_cache_info_free_push.
(disk_cache_block_deref): Only call disk_cache_info_free_push if the flags
of the block do not contain DC_DONT_REUSE flags.
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When cross-compiling, OTHERLIBS magically turns -lpthread into the path
to the host libpthread.so file, resulting in build issues. LDLIBS does
not suffer from this problem and it seems that is already being used in
other Makefiles. This patch removes OTHERLIBS entirely from the build
system.
* Makeconf: Remove references to OTHERLIBS
* auth/Makefile: Replace OTHERLIBS with LDLIBS.
* boot/Makefile: Likewise.
* console/Makefile: Likewise.
* exec/Makefile: Likewise.
* ext2fs/Makefile: Likewise.
* fatfs/Makefile: Likewise.
* ftpfs/Makefile: Likewise.
* hostmux/Makefile: Likewise.
* isofs/Makefile: Likewise.
* libhurd-slab/Makefile: Likewise.
* nfs/Makefile: Likewise.
* nfsd/Makefile: Likewise.
* pfinet/Makefile: Likewise.
* proc/Makefile: Likewise.
* procfs/Makefile: Likewise.
* random/Makefile: Likewise.
* storeio/Makefile: Likewise.
* term/Makefile: Likewise.
* tmpfs/Makefile: Likewise.
* usermux/Makefile: Likewise.
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ext2fs: Fix compiler warnings.
* ext2fs/balloc.c: Use unsigned char instead of char.
* ext2fs/bitmap.c Use unsigned char for bitmaps.
* ext2fs/dir.c: Fix format.
* ext2fs/ext2fs.h: Use unsigned char for bitmaps.
* ext2fs/ialloc.c: Use unsigned char for bitmaps. Fix format string in
ext2_warning.
* ext2fs/pager.c: Fix format string in ext2_warning and ext2_error.
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This avoids a linear scan through the cache.
* ext2fs/ext2fs.h (struct disk_cache_info): New field 'next'.
* ext2fs/pager.c (disk_cache_hint): Drop.
(disk_cache_info_free, disk_cache_info_free_lock): New variables.
(disk_cache_info_free_pop, disk_cache_info_free_push): New functions.
(disk_cache_init): Adjust slightly.
(disk_cache_block_ref): Use new functions.
(disk_cache_block_deref): Likewise.
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* ext2fs/ext2fs.h: Disable block cache debugging by default.
* ext2fs/pager.c: Likewise.
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* ext2fs/pager.c (disk_cache_block_ref): Improve the cache by using
the new lookup and insertion functions that return and use a location
pointer.
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* console/pager.c (user_pager_init): Remove unused variables.
* ext2fs/pager.c (create_disk_pager): Likewise.
* fatfs/pager.c (create_fat_pager): Likewise.
* storeio/pager.c (init_dev_paging): Likewise.
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On some systems, ext2fs.static would regularly hang at startup, as a
race condition meant it would process paging requests while remounting.
To fix this, libpager has been altered to allow inhibiting and resuming
its worker threads, and ext2fs uses this to inhibit paging while
remounting.
* console/pager.c (pager_requests): New variable.
(user_pager_init): Updated call to pager_start_workers to use new
pager_requests variable.
* daemons/runsystem.sh: Removed artificial delay working around the race
condition.
* ext2fs/ext2fs.c (diskfs_reload_global_state): Call new
inhibit_ext2_pager and resume_ext2_pager functions, and leave sblock as
non-NULL so it will be munmapped.
* ext2fs/ext2fs.h (inhibit_ext2_pager,resume_ext2_pager): New functions.
* ext2fs/pager.c (file_pager_requests): New variable.
(create_disk_pager): Updated call to pager_start_workers to use new
file_pager_requests variable.
(inhibit_ext2_pager,resume_ext2_pager): New functions.
* fatfs/fatfs.h (inhibit_fat_pager,resume_fat_pager): New functions.
* fatfs/pager.c (file_pager_requests): New variable.
(create_fat_pager): Updated call to pager_start_workers to use new
file_pager_requests variable.
(inhibit_fat_pager,resume_fat_pager): New functions.
* libdiskfs/disk-pager.c (diskfs_disk_pager_requests): New variable.
(diskfs_start_disk_pager): Updated call to pager_start_workers to use
new diskfs_disk_pager_requests variable.
* libdiskfs/diskfs-pager.h (diskfs_disk_pager_requests): New variable.
* libpager/demuxer.c (struct pager_requests): Renamed struct requests to
struct pager_requests. Replaced queue with queue_in and queue_out
pointers. Added inhibit_wakeup field.
(pager_demuxer): Updated to use new queue_in/queue_out pointers. Only
wake up workers if not inhibited.
(worker_func): Updated to use new queue_in/queue_out pointers. Final
worker thread to sleep notifies the inhibit_wakeup condition variable.
(pager_start_workers): Added out parameter for the requests instance.
Allocate heap space shared by both queues. Initialise new inhibit_wakeup
condition.
(pager_inhibit_workers,pager_resume_workers): New functions.
* libpager/pager.h (struct pager_requests): Public forward definition.
(pager_start_workers): Added out parameter for the requests instance.
(pager_inhibit_workers,pager_resume_workers): New functions.
* libpager/queue.h (queue_empty): New function.
* storeio/pager.c (pager_requests): New variable.
(init_dev_paging): Updated call to pager_start_workers to use new
pager_requests variable.
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* ext2fs/ext2fs.h (ext2_debug_): New macro that unconditionally prints
the given message.
(ext2_debug): Use the new macro.
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* ext2fs/ext2fs.h (ext2_debug): Print to stderr.
(printf): Drop declaration.
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Previously, all users of libdiskfs implemented a node cache on their
own. Move the node cache from ext2fs into libdiskfs. We preserve the
previous API by marking all functions that we pull from ext2fs as
weak, so that users like tmpfs can still implement their own node
cache.
* ext2fs/dir.c (diskfs_lookup_hard): Adjust accordingly.
* ext2fs/ext2fs.c (main): Don't call `inode_init'.
* ext2fs/ext2fs.h (struct disknode): Drop `hnext', `hprevp'.
* ext2fs/inode.c: Move the node cache into diskfs.
(diskfs_user_make_node): New function.
(diskfs_try_dropping_softrefs): Rename to `diskfs_user_try_dropping_softrefs'.
(read_node): Rename to `diskfs_user_read_node'. Also move a chunk of
code dealing with generations from `diskfs_cached_lookup' here.
* libdiskfs/Makefile (OTHERSRCS): Add `node-cache.c'.
* libdiskfs/diskfs.h (struct node): Add `hnext', `hprevp'.
Amend existing comments, add forward declarations.
* libdiskfs/node-cache.c: New file.
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Use `diskfs_make_node_alloc' to allocate both the node and the
disknode in a continuous chunk of memory. This increases locality and
reduces the pressure on the memory allocator.
* ext2fs/inode.c: Use `diskfs_node_disknode' to access the disknode.
(diskfs_cached_lookup): Use `diskfs_make_node_alloc' to allocate the
node.
(diskfs_node_norefs): Only free `np'.
* ext2fs/dir.c: Use `diskfs_node_disknode' to access the disknode.
* ext2fs/ext2fs.h: Likewise.
* ext2fs/getblk.c: Likewise.
* ext2fs/ialloc.c: Likewise.
* ext2fs/pager.c: Likewise.
* ext2fs/truncate.c: Likewise.
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* libdiskfs/diskfs.h (struct node): Use refcounts_t for reference counting.
(diskfs_node_refcnt_lock): Remove.
(diskfs_node_norefs,diskfs_drop_node): Change comments accordingly.
* libdiskfs/init-init.c: Adjust accordingly.
* libdiskfs/node-drop.c: Likewise.
* libdiskfs/node-make.c: Likewise.
* libdiskfs/node-nput.c: Likewise.
* libdiskfs/node-nputl.c: Likewise.
* libdiskfs/node-nref.c: Likewise.
* libdiskfs/node-nrefl.c: Likewise.
* libdiskfs/node-nrele.c: Likewise.
* libdiskfs/node-nrelel.c: Likewise.
* ext2fs/inode.c: Likewise.
* fatfs/inode.c: Likewise.
* isofs/inode.c: Likewise.
* tmpfs/node.c: Likewise.
* doc/hurd.texi: Likewise.
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Previously, ext2fs used diskfs_node_refcnt_lock to serialize access to
the nodehash.
Use a separate lock to protect nodehash. Adjust the reference
counting accordingly. Every node in the nodehash carries a light
reference. When we are asked to give up that light reference, we
reacquire our lock momentarily to check whether someone else
reacquired a reference through the nodehash.
* ext2fs/inode.c (nodecache_lock): New lock.
(diskfs_cached_lookup): Use a separate lock to protect nodehash.
Adjust the reference counting accordingly.
(ifind): Likewise.
(diskfs_node_iterate): Likewise.
(diskfs_node_norefs): Move the code removing the node from nodehash...
(diskfs_try_dropping_softrefs): ... here, where we check whether
someone reacquired a reference, and if so hold on to our light
reference.
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* ext2fs/inode.c: Replace `bcopy' with `memcpy' or `memmove' as
appropriate.
* ext2fs/pager.c: Likewise.
* isofs/lookup.c: Likewise.
* isofs/main.c: Likewise.
* isofs/rr.c: Likewise.
* libdiskfs/file-get-trans.c: Likewise.
* libiohelp/return-buffer.c: Likewise.
* libpager/pagemap.c: Likewise.
* libpipe/pq.c: Likewise.
* libpipe/pq.h: Likewise.
* libstore/unzipstore.c: Likewise.
* mach-defpager/default_pager.c: Likewise.
* pfinet/ethernet.c: Likewise.
* pfinet/tunnel.c: Likewise.
* storeio/dev.c: Likewise.
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