mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-01-23 00:07:07 +03:00
326d7c1b3b
Reading from /proc/meminfo is really slow We don't want to start swapping to disk. Deceptively, memory available goes up when we start to swap to disk making performance even worse. To mitigate this: 1. replace reading from meminfo with proper system calls. 2. attempt to lock allocations in physical memory space. 3. check our own allocated memory instead of available memory. 4. still check available memory in the off chance we're trying to play nice with other apps. Signed-off-by: Daniel Hill <daniel@gluo.nz> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
300 lines
8.3 KiB
C
300 lines
8.3 KiB
C
/*
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* Authors: Kent Overstreet <kent.overstreet@gmail.com>
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* Gabriel de Perthuis <g2p.code@gmail.com>
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* Jacob Malevich <jam@datera.io>
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*
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* GPLv2
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <raid/raid.h>
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#include "cmds.h"
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static void usage(void)
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{
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puts("bcachefs - tool for managing bcachefs filesystems\n"
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"usage: bcachefs <command> [<args>]\n"
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"\n"
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"Superblock commands:\n"
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" format Format a new filesystem\n"
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" show-super Dump superblock information to stdout\n"
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" set-option Set a filesystem option\n"
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"\n"
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#ifndef BCACHEFS_NO_RUST
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"Mount:\n"
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" mount Mount a filesystem\n"
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"\n"
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#endif
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"Repair:\n"
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" fsck Check an existing filesystem for errors\n"
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"\n"
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#if 0
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"Startup/shutdown, assembly of multi device filesystems:\n"
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" assemble Assemble an existing multi device filesystem\n"
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" incremental Incrementally assemble an existing multi device filesystem\n"
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" run Start a partially assembled filesystem\n"
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" stop Stop a running filesystem\n"
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"\n"
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#endif
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"Commands for managing a running filesystem:\n"
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" fs usage Show disk usage\n"
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"\n"
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"Commands for managing devices within a running filesystem:\n"
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" device add Add a new device to an existing filesystem\n"
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" device remove Remove a device from an existing filesystem\n"
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" device online Re-add an existing member to a filesystem\n"
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" device offline Take a device offline, without removing it\n"
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" device evacuate Migrate data off of a specific device\n"
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" device set-state Mark a device as failed\n"
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" device resize Resize filesystem on a device\n"
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" device resize-journal Resize journal on a device\n"
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"\n"
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"Commands for managing subvolumes and snapshots:\n"
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" subvolume create Create a new subvolume\n"
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" subvolume delete Delete an existing subvolume\n"
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" subvolume snapshot Create a snapshot\n"
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"\n"
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"Commands for managing filesystem data:\n"
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" data rereplicate Rereplicate degraded data\n"
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" data job Kick off low level data jobs\n"
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"\n"
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"Encryption:\n"
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" unlock Unlock an encrypted filesystem prior to running/mounting\n"
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" set-passphrase Change passphrase on an existing (unmounted) filesystem\n"
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" remove-passphrase Remove passphrase on an existing (unmounted) filesystem\n"
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"\n"
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"Migrate:\n"
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" migrate Migrate an existing filesystem to bcachefs, in place\n"
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" migrate-superblock Add default superblock, after bcachefs migrate\n"
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"\n"
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"Commands for operating on files in a bcachefs filesystem:\n"
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" setattr Set various per file attributes\n"
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"\n"
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"Debug:\n"
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"These commands work on offline, unmounted filesystems\n"
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" dump Dump filesystem metadata to a qcow2 image\n"
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#ifndef BCACHEFS_NO_RUST
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" list List filesystem metadata in textual form\n"
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#endif
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" list_journal List contents of journal\n"
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"\n"
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"FUSE:\n"
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" fusemount Mount a filesystem via FUSE\n"
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"\n"
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"Miscellaneous:\n"
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#ifndef BCACHEFS_NO_RUST
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" completions Generate shell completions\n"
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#endif
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" version Display the version of the invoked bcachefs tool\n");
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}
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static char *full_cmd;
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static char *pop_cmd(int *argc, char *argv[])
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{
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char *cmd = argv[1];
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if (!(*argc < 2))
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memmove(&argv[1], &argv[2], *argc * sizeof(argv[0]));
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(*argc)--;
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full_cmd = mprintf("%s %s", full_cmd, cmd);
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return cmd;
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}
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static int fs_cmds(int argc, char *argv[])
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{
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char *cmd = pop_cmd(&argc, argv);
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if (argc < 1) {
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usage();
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exit(EXIT_FAILURE);
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}
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if (!strcmp(cmd, "usage"))
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return cmd_fs_usage(argc, argv);
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return 0;
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}
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static int device_cmds(int argc, char *argv[])
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{
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char *cmd = pop_cmd(&argc, argv);
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if (argc < 1)
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return device_usage();
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if (!strcmp(cmd, "add"))
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return cmd_device_add(argc, argv);
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if (!strcmp(cmd, "remove"))
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return cmd_device_remove(argc, argv);
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if (!strcmp(cmd, "online"))
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return cmd_device_online(argc, argv);
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if (!strcmp(cmd, "offline"))
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return cmd_device_offline(argc, argv);
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if (!strcmp(cmd, "evacuate"))
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return cmd_device_evacuate(argc, argv);
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if (!strcmp(cmd, "set-state"))
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return cmd_device_set_state(argc, argv);
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if (!strcmp(cmd, "resize"))
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return cmd_device_resize(argc, argv);
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if (!strcmp(cmd, "resize-journal"))
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return cmd_device_resize_journal(argc, argv);
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return 0;
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}
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static int data_cmds(int argc, char *argv[])
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{
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char *cmd = pop_cmd(&argc, argv);
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if (argc < 1)
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return data_usage();
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if (!strcmp(cmd, "rereplicate"))
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return cmd_data_rereplicate(argc, argv);
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if (!strcmp(cmd, "job"))
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return cmd_data_job(argc, argv);
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return 0;
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}
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static int subvolume_cmds(int argc, char *argv[])
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{
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char *cmd = pop_cmd(&argc, argv);
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if (argc < 1)
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return subvolume_usage();
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if (!strcmp(cmd, "create"))
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return cmd_subvolume_create(argc, argv);
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if (!strcmp(cmd, "delete"))
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return cmd_subvolume_delete(argc, argv);
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if (!strcmp(cmd, "snapshot"))
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return cmd_subvolume_snapshot(argc, argv);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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/* we don't want to swap */
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mlockall(MCL_FUTURE);
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raid_init();
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full_cmd = argv[0];
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/* Are we being called via a symlink? */
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if (strstr(full_cmd, "mkfs"))
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return cmd_format(argc, argv);
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if (strstr(full_cmd, "fsck"))
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return cmd_fsck(argc, argv);
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#ifdef BCACHEFS_FUSE
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if (strstr(full_cmd, "mount.fuse"))
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return cmd_fusemount(argc, argv);
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#endif
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#ifndef BCACHEFS_NO_RUST
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if (strstr(full_cmd, "mount"))
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return cmd_mount(argc, argv);
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#endif
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setvbuf(stdout, NULL, _IOLBF, 0);
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char *cmd = pop_cmd(&argc, argv);
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if (!cmd) {
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puts("missing command\n");
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goto usage;
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}
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/* these subcommands display usage when argc < 2 */
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if (!strcmp(cmd, "device"))
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return device_cmds(argc, argv);
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if (!strcmp(cmd, "fs"))
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return fs_cmds(argc, argv);
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if (!strcmp(cmd, "data"))
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return data_cmds(argc, argv);
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if (!strcmp(cmd, "subvolume"))
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return subvolume_cmds(argc, argv);
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if (!strcmp(cmd, "format"))
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return cmd_format(argc, argv);
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if (!strcmp(cmd, "fsck"))
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return cmd_fsck(argc, argv);
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if (!strcmp(cmd, "version"))
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return cmd_version(argc, argv);
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if (!strcmp(cmd, "show-super"))
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return cmd_show_super(argc, argv);
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if (!strcmp(cmd, "set-option"))
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return cmd_set_option(argc, argv);
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#if 0
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if (!strcmp(cmd, "assemble"))
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return cmd_assemble(argc, argv);
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if (!strcmp(cmd, "incremental"))
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return cmd_incremental(argc, argv);
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if (!strcmp(cmd, "run"))
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return cmd_run(argc, argv);
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if (!strcmp(cmd, "stop"))
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return cmd_stop(argc, argv);
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#endif
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if (!strcmp(cmd, "unlock"))
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return cmd_unlock(argc, argv);
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if (!strcmp(cmd, "set-passphrase"))
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return cmd_set_passphrase(argc, argv);
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if (!strcmp(cmd, "remove-passphrase"))
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return cmd_remove_passphrase(argc, argv);
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if (!strcmp(cmd, "migrate"))
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return cmd_migrate(argc, argv);
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if (!strcmp(cmd, "migrate-superblock"))
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return cmd_migrate_superblock(argc, argv);
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if (!strcmp(cmd, "dump"))
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return cmd_dump(argc, argv);
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#ifndef BCACHEFS_NO_RUST
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if (!strcmp(cmd, "list"))
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return cmd_list(argc, argv);
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#endif
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if (!strcmp(cmd, "list_journal"))
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return cmd_list_journal(argc, argv);
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if (!strcmp(cmd, "kill_btree_node"))
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return cmd_kill_btree_node(argc, argv);
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if (!strcmp(cmd, "setattr"))
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return cmd_setattr(argc, argv);
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#ifndef BCACHEFS_NO_RUST
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if (!strcmp(cmd, "mount"))
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return cmd_mount(argc, argv);
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if (strstr(cmd, "completions"))
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return cmd_completions(argc, argv);
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#endif
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#ifdef BCACHEFS_FUSE
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if (!strcmp(cmd, "fusemount"))
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return cmd_fusemount(argc, argv);
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#endif
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if (!strcmp(cmd, "--help")) {
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usage();
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return 0;
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}
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printf("Unknown command %s\n", cmd);
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usage:
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usage();
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exit(EXIT_FAILURE);
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}
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