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Austin S. Hemmelgarn 3519f83574 btrfs-progs: add stat check in open_ctree_fs_info 
Currently, open_ctree_fs_info will open whatever path you pass it and try
to interpret it as a BTRFS filesystem.  While this is not nessecarily
dangerous (except possibly if done on a character device), it does
result in some rather cryptic and non-sensical error messages when
trying to run certain commands in ways they weren't intended to be run.
Add a check using stat(2) to verify that the path we've been passed is
in fact a regular file or a block device, or a symlink pointing to a
regular file or block device.

This causes the following commands to provide a helpful error message
when run on a FIFO, directory, character device, or socket:
    * btrfs check
    * btrfs restore
    * btrfs-image
    * btrfs-find-root
    * btrfs inspect-internal dump-tree

stat(2) is used instead of lstat(2), as stat(2) follows symlinks just
like open(2) does, which means we check the same inode that open(2)
opens, and thus don't need special handling for symlinks.

Signed-off-by: Austin S. Hemmelgarn <ahferroin7@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
 		2016-03-18 16:38:14 +01:00
Documentation btrfs-progs: docs: man5, add space_cache=v2 2016-03-17 14:49:32 +01:00
tests btrfs-progs: tests: add 013-subvolume-sync-crash 2016-03-17 14:22:43 +01:00
.gitignore btrfs-progs: docs: add html build target 2015-11-02 09:35:00 +01:00
Android.mk btrfs-progs: Add Android build mk file 2015-09-01 14:02:49 +02:00
COPYING fix COPYING 2007-06-12 15:41:08 -04:00
INSTALL btrfs-progs: INSTALL: enhance build instructions 2015-09-07 11:46:32 +02:00
Makefile.extrawarn btrfs-progs: build: allow to build with various compiler warnings 2015-10-21 14:29:26 +02:00
Makefile.in btrfs-progs: filesystem: add 'du' command 2016-03-14 13:42:47 +01:00
README.md btrfs-progs: add an initial README 2015-11-02 15:10:13 +01:00
androidcompat.h btrfs-progs: add compat header for android 2015-09-01 14:02:49 +02:00
autogen.sh btrfs-progs: autogen: add check for pkg-config 2015-09-07 11:09:17 +02:00
backref.c btrfs-progs: libbtrfs: remove max/min macros from API 2016-03-14 13:42:47 +01:00
backref.h btrfs-progs: unify header file inclusion protections 2015-01-21 17:49:26 +01:00
bcp Btrfs-progs: Correct path munging in bcp 2011-10-25 09:18:58 -04:00
bitops.h btrfs-progs: compat: define DIV_ROUND_UP if not already defined 2015-06-05 23:29:59 +02:00
btrfs-calc-size.c btrfs-progs: unify argc min/max checking 2016-03-14 13:42:47 +01:00
btrfs-completion btrfs-progs: update docs for inspect-internal dump-super 2016-03-14 13:42:47 +01:00
btrfs-convert.c btrfs-progs: unify argc min/max checking 2016-03-14 13:42:47 +01:00
btrfs-corrupt-block.c btrfs-progs: unify argc min/max checking 2016-03-14 13:42:47 +01:00
btrfs-crc.c btrfs-progs: use check_argc_* to check arg number for all tools 2014-08-22 15:07:02 +02:00
btrfs-debug-tree.c btrfs-progs: unify naming of argc and argv 2016-03-14 13:42:47 +01:00
btrfs-debugfs btrfs-progs: btrfs-debugfs: fetch block group information 2016-03-16 10:33:11 +01:00
btrfs-find-root.c btrfs-progs: Add new option for specify chunk root bytenr 2016-03-14 13:42:47 +01:00
btrfs-fragments.c btrfs-progs: unify argc min/max checking 2016-03-14 13:42:47 +01:00
btrfs-image.c btrfs-progs: Add new option for specify chunk root bytenr 2016-03-14 13:42:47 +01:00
btrfs-list.c btrfs-progs: check for negative return value from ioctl 2016-01-12 15:02:55 +01:00
btrfs-list.h btrfs-progs: add missing includes to header files 2015-06-10 02:52:21 +02:00
btrfs-map-logical.c btrfs-progs: unify argc min/max checking 2016-03-14 13:42:47 +01:00
btrfs-select-super.c btrfs-progs: utils: switch more error messages to common helpers 2016-03-14 14:38:16 +01:00
btrfs-show-super.c btrfs-progs: introduce inspect-internal dump-super 2016-03-14 13:42:47 +01:00
btrfs-zero-log.c btrfs-progs: unify argc min/max checking 2016-03-14 13:42:47 +01:00
btrfs.c btrfs-progs: move prefixcmp to utils 2016-01-14 11:07:10 +01:00
btrfsck.h btrfs-progs: chunk-recovery: Fix a float point error 2015-11-19 18:34:30 +01:00
btrfstune.c btrfs-progs: unify argc min/max checking 2016-03-14 13:42:47 +01:00
chunk-recover.c btrfs-progs: fix endian bugs in chunk rebuilding 2016-01-12 15:01:05 +01:00
cmds-balance.c btrfs-progs: add getopt stubs where needed 2016-03-14 13:42:47 +01:00
cmds-check.c btrfs-progs: check: unify naming of long option values 2016-03-14 13:42:47 +01:00
cmds-device.c btrfs-progs: Introduce device delete by devid 2016-03-14 14:11:33 +01:00
cmds-fi-du.c btrfs-progs: fi du: fix incorrect column order 2016-03-18 14:29:26 +01:00
cmds-fi-du.h btrfs-progs: filesystem: add 'du' command 2016-03-14 13:42:47 +01:00
cmds-fi-usage.c btrfs-progs: fi usage: support mixed blockgroups 2016-01-13 16:43:13 +01:00
cmds-fi-usage.h btrfs-progs: add missing includes to header files 2015-06-10 02:52:21 +02:00
cmds-filesystem.c btrfs-progs: fix resource leak during device scanning 2016-03-15 10:28:14 +01:00
cmds-inspect-dump-super.c btrfs-progs: dump-super: add more long options 2016-03-15 16:41:06 +01:00
cmds-inspect-dump-super.h btrfs-progs: unify naming of argc and argv 2016-03-14 13:42:47 +01:00
cmds-inspect-dump-tree.c btrfs-progs: dump-tree: let --tree understand name of the tree 2016-03-14 13:42:47 +01:00
cmds-inspect-dump-tree.h btrfs-progs: unify naming of argc and argv 2016-03-14 13:42:47 +01:00
cmds-inspect.c btrfs-progs: inspect subvolid-resolve: fix argument parsing 2016-03-18 14:14:03 +01:00
cmds-property.c btrfs-progs: fix a regression that "property" with -t option doesn't work 2016-03-16 10:19:42 +01:00
cmds-qgroup.c btrfs-progs: qgroup assign: handle --no-rescan option 2016-03-18 14:19:29 +01:00
cmds-quota.c btrfs-progs: add getopt stubs where needed 2016-03-14 13:42:47 +01:00
cmds-receive.c btrfs-progs: receive: don't leak open find handle 2016-01-14 11:07:10 +01:00
cmds-replace.c btrfs-progs: check for negative return value from ioctl 2016-01-12 15:02:55 +01:00
cmds-rescue.c btrfs-progs: unify argc min/max checking, a few more 2016-03-14 13:42:47 +01:00
cmds-restore.c btrfs-progs: Replace hardcoded PAGE_CACHE_SIZE with sectorsize. 2016-03-14 13:42:47 +01:00
cmds-scrub.c btrfs-progs: add getopt stubs where needed 2016-03-14 13:42:47 +01:00
cmds-send.c btrfs-progs: describe btrfs-send requires read-only subvolume 2016-02-04 15:19:32 +01:00
cmds-subvolume.c btrfs-progs: subvol get-default: fix argument parsing 2016-03-18 14:10:12 +01:00
commands.h btrfs-progs: let test_issubvolume return the exact error 2016-01-14 11:07:10 +01:00
configure.ac btrfs-progs: Use AC_CHECK_TOOL to find AR 2016-01-14 11:46:59 +01:00
crc32c.c btrfs-progs: make many private symbols static 2013-09-03 19:41:08 +02:00
crc32c.h btrfs-progs: libify some parts of btrfs-progs 2013-02-27 15:24:25 +01:00
ctree.c btrfs-progs: libbtrfs: remove max/min macros from API 2016-03-14 13:42:47 +01:00
ctree.h btrfs-progs: Allow open_ctree to return fs_info even chunk tree is corrupted 2016-02-26 17:27:58 +01:00
dir-item.c btrfs-progs: cleanup, mark more functions static 2015-09-14 23:45:53 +02:00
dir-test.c Btrfs-progs: fix magic return value in dir-test.c 2013-10-16 08:20:42 -04:00
disk-io.c btrfs-progs: add stat check in open_ctree_fs_info 2016-03-18 16:38:14 +01:00
disk-io.h btrfs-progs: Add new option for specify chunk root bytenr 2016-03-14 13:42:47 +01:00
extent-cache.c btrfs-progs: extent-tree: Add add_merge_cache_extent function 2016-01-12 15:01:03 +01:00
extent-cache.h btrfs-progs: extent-tree: Add add_merge_cache_extent function 2016-01-12 15:01:03 +01:00
extent-tree.c btrfs-progs: Add support for tree block operations on fs_info without roots 2016-02-26 17:27:58 +01:00
extent_io.c btrfs-progs: libbtrfs: remove max/min macros from API 2016-03-14 13:42:47 +01:00
extent_io.h btrfs-progs: check the free space tree in btrfsck 2016-01-12 15:02:54 +01:00
file-item.c btrfs-progs: libbtrfs: remove max/min macros from API 2016-03-14 13:42:47 +01:00
file.c btrfs-progs: Add btrfs_get_extent() and btrfs_punch_hole(). 2015-02-02 14:16:38 +01:00
find-root.c btrfs-progs: find-root: Allow btrfs-find-root to search chunk root even chunk root is corrupted 2016-02-26 17:27:58 +01:00
find-root.h btrfs-progs: find-root: Allow btrfs-find-root to search chunk root even chunk root is corrupted 2016-02-26 17:27:58 +01:00
free-space-cache.c btrfs-progs: libbtrfs: remove max/min macros from API 2016-03-14 13:42:47 +01:00
free-space-cache.h btrfs-progs: check the free space tree in btrfsck 2016-01-12 15:02:54 +01:00
free-space-tree.c btrfs-progs: free-space-tree: minor message adjustments 2016-01-12 15:02:55 +01:00
free-space-tree.h btrfs-progs: check the free space tree in btrfsck 2016-01-12 15:02:54 +01:00
fsck.btrfs btrfs-progs: fsck.btrfs: Fix bashism and bad getopts processing 2015-05-21 16:53:44 +02:00
hash.h btrfs-progs: unify header file inclusion protections 2015-01-21 17:49:26 +01:00
hasher.c Unaligned access fixes 2008-02-15 11:19:58 -05:00
help.c btrfs-progs: move prefixcmp to utils 2016-01-14 11:07:10 +01:00
inode-item.c btrfs-progs: fix overflow check in btrfs_insert_inode_ref 2014-12-30 15:48:55 +01:00
inode-map.c btrfs-progs: libbtrfs: remove max/min macros from API 2016-03-14 13:42:47 +01:00
inode.c btrfs-progs: handle orphan creation error in btrfs_unlink 2015-01-06 18:46:03 +01:00
internal.h btrfs-progs: libbtrfs: remove max/min macros from API 2016-03-14 13:42:47 +01:00
interval_tree_generic.h btrfs-progs: Import interval tree implemenation from Linux v4.0-rc7. 2016-02-26 17:27:58 +01:00
ioctl-test.c btrfs-progs: mark static & remove unused from non-kernel code 2013-09-03 19:40:54 +02:00
ioctl.h btrfs-progs: Introduce device delete by devid 2016-03-14 14:11:33 +01:00
kerncompat.h btrfs-progs: libbtrfs: remove max/min macros from API 2016-03-14 13:42:47 +01:00
library-test.c btrfs-progs: build, add basic build test for library 2014-11-07 17:52:57 +01:00
list.h Btrfs-progs: introduce list_{first, next}_entry/list_splice_tail{_init} 2013-07-03 14:06:55 -04:00
list_sort.c btrfs-progs: add list_sort and use it to sort devices by id 2013-10-16 08:22:26 -04:00
list_sort.h btrfs-progs: add list_sort and use it to sort devices by id 2013-10-16 08:22:26 -04:00
mkfs.c btrfs-progs: mkfs: also parse raid0 profile case-insensitive 2016-03-16 17:41:16 +01:00
print-tree.c btrfs-progs: print-tree: show the compression method string 2016-03-14 13:42:47 +01:00
print-tree.h btrfs-progs: unify header file inclusion protections 2015-01-21 17:49:26 +01:00
props.c btrfs-progs: use NULL instead of 0 2016-01-12 15:01:05 +01:00
props.h btrfs-progs: unify header file inclusion protections 2015-01-21 17:49:26 +01:00
qgroup-verify.c btrfs-progs: fix using on-disk structure to store in memory data 2016-01-12 15:01:05 +01:00
qgroup-verify.h btrfs-progs: add missing includes to header files 2015-06-10 02:52:21 +02:00
qgroup.c btrfs-progs: remove unnecessary errno temp variables 2016-01-12 15:02:55 +01:00
qgroup.h btrfs-progs: add missing includes to header files 2015-06-10 02:52:21 +02:00
quick-test.c btrfs-progs: use calloc instead of malloc+memset 2015-10-21 14:29:26 +02:00
radix-tree.c btrfs-progs: Remove a unused function root_gtp_mask(). 2014-12-19 15:04:56 +01:00
radix-tree.h btrfs-progs: libify some parts of btrfs-progs 2013-02-27 15:24:25 +01:00
raid6.c btrfs-progs: give raid6.c its exported prototypes 2013-09-03 19:41:11 +02:00
random-test.c Btrfs-progs: fix magic return value in random-test.c 2013-10-16 08:20:42 -04:00
rbtree-utils.c Btrfs-progs: break out rbtree util functions 2014-10-14 10:39:39 +02:00
rbtree-utils.h btrfs-progs: libbtrfs, make exported headers compatible with C++ 2014-11-03 23:50:50 +01:00
rbtree.c Btrfs-progs: update rbtree libs 2014-10-14 10:39:40 +02:00
rbtree.h btrfs-progs: Import interval tree implemenation from Linux v4.0-rc7. 2016-02-26 17:27:58 +01:00
rbtree_augmented.h btrfs-progs: Import interval tree implemenation from Linux v4.0-rc7. 2016-02-26 17:27:58 +01:00
repair.c Btrfs-progs: introduce common insert/search/delete functions for rb-tree 2013-07-03 14:06:54 -04:00
repair.h btrfs-progs: add missing includes to header files 2015-06-10 02:52:21 +02:00
root-tree.c Btrfs-progs: free path if we don't find root item 2014-03-21 06:23:32 -07:00
send-stream.c btrfs-progs: fix compiler warning 2014-11-07 18:14:38 +01:00
send-stream.h btrfs-progs: add missing includes to header files 2015-06-10 02:52:21 +02:00
send-test.c btrfs-progs: check for negative return value from ioctl 2016-01-12 15:02:55 +01:00
send-utils.c btrfs-progs: check for negative return value from ioctl 2016-01-12 15:02:55 +01:00
send-utils.h btrfs-progs: drop argument from attribute deprecated 2015-06-30 15:05:07 +02:00
send.h btrfs-progs: unify header file inclusion protections 2015-01-21 17:49:26 +01:00
show-blocks Fix showblocks to display different colors for different metadata roots 2009-03-09 13:00:44 -04:00
string-table.c btrfs-progs: add function attributes for the printf-like 2016-01-12 15:02:55 +01:00
string-table.h btrfs-progs: string table: fix whitespace damage 2015-11-03 00:55:20 +01:00
super-recover.c Btrfs-progs: skip opening all devices with restore 2015-02-09 14:53:15 -05:00
task-utils.c btrfs-progs: Check periodic.timer_fd's value before use 2015-11-16 14:23:45 +01:00
task-utils.h btrfs-progs: unify header file inclusion protections 2015-01-21 17:49:26 +01:00
transaction.h btrfs-progs: add missing includes to header files 2015-06-10 02:52:21 +02:00
ulist.c btrfs-progs: import ulist 2014-08-22 14:39:33 +02:00
ulist.h btrfs-progs: unify header file inclusion protections 2015-01-21 17:49:26 +01:00
utils-lib.c btrfs-progs: drop feature defines from C files, in favour of CFLAGS defines 2015-01-27 14:45:59 +01:00
utils.c btrfs-progs: utils: switch more error messages to common helpers 2016-03-14 14:38:16 +01:00
utils.h btrfs-progs: libbtrfs: remove max/min macros from API 2016-03-14 13:42:47 +01:00
uuid-tree.c btrfs-progs: fix in-place byte swapping 2013-09-03 19:41:06 +02:00
version.h.in btrfs-progs: re-introduce BTRFS_BUILD_VERSION in version.h 2015-03-16 18:40:06 +01:00
version.sh Btrfs progs v4.5-rc1 2016-03-16 19:07:12 +01:00
volumes.c btrfs-progs: don't print message for a missing device 2016-03-14 13:42:47 +01:00
volumes.h btrfs-progs: extend balance args to take min/max usage filter 2016-01-12 15:01:04 +01:00

README.md

Btrfs-progs

Userspace utilities to manage btrfs filesystems. License: GPLv2.

Btrfs is a copy on write (COW) filesystem for Linux aimed at implementing advanced features while focusing on fault tolerance, repair and easy administration.

This repository hosts following utilities:

  • btrfs — the main administration tool (manual page)
  • mkfs.btrfs — utility to create the filesystem (manual page)

See INSTALL for build instructions.

Release cycle

The major version releases are time-based and follow the cycle of the linux kernel releases. The cycle usually takes 2 months. A minor version releases may happen in the meantime if there are queued bug fixes or minor useful improvements.

Development

The patch submissions, development or general discussions take place at linux-btrfs@vger.kernel.org mailinglist, subsciption not required.

References