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* libmount: improve fs referencing in tablesTim Hildering2019-03-081-0/+1
| | | | | | | | | | | | | | | * Added member 'struct libmnt_table *tab' to libmnt_fs structure. * Added 'mnt_fs_get_table()'. * Removed overhead from 'mnt_table_{insert,move,remove}_fs(). * Added check to 'mnt_table_set_iter()' that entry is member of table. [kzak@redhat.com: - add to libmount.sys - add to docs - cleanup commit message - set fs->tab = NULL before mnt_unref_fs() in mnt_table_remove_fs()] Signed-off-by: Tim Hildering <hilderingt@posteo.net> Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add mnt_table_{find,insert,move}_fs()Karel Zak2019-02-211-0/+5
| | | | | | | | Add functions to insert FS into table to specified position and to move FS between two tables. Co-Author: Tim Hildering <hilderingt@posteo.net> Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add support for MS_REMOUNT on --allKarel Zak2019-01-161-0/+6
| | | | | | | | | | | | | This patch add to support for remount-all operation to libmount and mount(8). For example: mount --all -o remount,ro -t vfat to remount read-only all VFAT filesystems. Addresses: https://github.com/karelzak/util-linux/issues/589 Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: export mnt_guess_system_root() by APIKarel Zak2018-12-101-0/+2
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: cleanup licenses sections in the filesKarel Zak2018-08-161-2/+5
| | | | | | | | | * add SPDX-License-Identifier (see https://spdx.org/licenses/) * add "This file part of libmount from util-linux project." * use proper text for LGPL-2.1-or-later * use the same texts everywhere Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: added error MNT_ERR_NAMESPACEVaclav Dolezal2018-06-111-0/+6
| | | | Signed-off-by: Vaclav Dolezal <vdolezal@redhat.com>
* libmount: add support for switching namespacesVaclav Dolezal2018-06-111-0/+14
| | | | | | | [kzak@redhat.com: - cosmetic changes, add some comments] Signed-off-by: Vaclav Dolezal <vdolezal@redhat.com> Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: don't use MS_MGC_VAL magic in mount(2) syscallKarel Zak2018-06-011-1/+2
| | | | | | | | | Specifying MS_MGC_VAL was required in kernel versions prior to 2.4, but since Linux 2.4 is no longer required and is ignored if specified The minimal kernel requirement for util-linux is Linux v2.6. Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: include sys/mount.h on Linux onlyKarel Zak2018-05-291-1/+1
| | | | | Addresses: https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=891812 Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: include sys/mount.h only if necessaryKarel Zak2018-03-221-1/+8
| | | | | Addresses: https://github.com/systemd/systemd/issues/8507 Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: make libmount.h more robustKarel Zak2018-03-201-0/+1
| | | | | | | | | | Let's include sys/mount.h to be sure that our local libmount fallbacks are not used by default to avoid possible conflicts with later included sys/mount.h. Addresses: https://github.com/systemd/systemd/pull/8452 Reported-by: Lennart Poettering <lennart@poettering.net> Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: export locking errors as MNT_EX_FILEIOKarel Zak2017-09-151-1/+7
| | | | | | | | | | | | The mount man page assumes locking errors mapped to MNT_EX_FILEIO (16) return code. Unfortunately, this is internally not exported as a special error code, so it's returned as a generic (errno based) stuff. This patch fixes this issue. Note that we still use locking for example for utab or when enabled /etc/mtab (disabled by default). Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add mnt_context_get_excode()Karel Zak2017-04-271-1/+72
| | | | | | | | | | | | | | | | It's pretty complex task to make mount(8) and umount(8) return code and generate error message. It seems better to do that in the libmount rather than force all library users to duplicate mount(8) mk_exit_code() functions. It also means that all the messages will be translated only once. Changes: * all error messages are printed by warn() * no more multi-line messages * all messages prefixed by mount target (mountpoint) * library provides mount(8) compatible MNT_EX_* codes Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1429531 Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: support MS_RDONLY on write-protected devicesKarel Zak2017-04-261-0/+5
| | | | | | | | This feature is supported by mount(8) only. It seems better move this code to libmount. The results is more simple mount(8) and the feature is accessible for all libmount users. Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: revert X-* and x-* meaningKarel Zak2016-12-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Let's hope this is last change necessary to cleanup x-* usage: x-* persistent option, stored in utab, available for umount, etc. X-* fstab comment only mount(8) supports x-mount.mkdir= as well as newly recommended X-mount.mkdir= Advantages: * less invasive * does not require exception for x-systemd * does not require rename x-initrd to X-initrd The systemd and dracut users will get the new (=fixed) functionality without a change in fstab configuration. This is the primary goal. Disadvantages: * not 100% compatible libmount behavior, x-* options have not been previously stored in utab. The API is the same, options will be still available, but on x-* libmount will write to /run/mount/utab. For now it seems only systemd uses x-*, and they like this behavior, so... Addresses: https://github.com/systemd/systemd/pull/4515 Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: introduce X-* commentsKarel Zak2016-12-081-0/+1
| | | | | | | | | | | | | x-* are fstab only and not stored in userspace (utab). In some cases it's not optional solution because the option is also necessary for umount or another operations. The X-* is exactly the same as x-*, but stored to utab (or mtab on old systems). It's usually bad idea to store mount options in userspace, but it's better to provide any solution that force users to bypass mount(8) (and friends) and implement 3rd-party incompatible solutions. Signed-off-by: Karel Zak <kzak@redhat.com>
* docs: some random fixesKarel Zak2016-09-271-2/+2
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: Introduce new error: MNT_ERR_LOOPOVERLAPStanislav Brabec2016-08-031-1/+7
| | | | | | | This error code is intended for situations where overlapping loop device exists and cannot be reused. Signed-off-by: Stanislav Brabec <sbrabec@suse.cz>
* libmount: add mnt_fs_set_priority()Ruediger Meier2016-02-231-0/+1
| | | | | | | | | | | Looks like it got lost in ce4dd666. Compiler warning discoverd this issue: libmount/src/fs.c:1171:5: warning: no previous prototype for 'mnt_fs_set_priority' [-Wmissing-prototypes] int mnt_fs_set_priority(struct libmnt_fs *fs, int prio) ^ Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
* libmount: handle btrfs default subvolume mountStanislav Brabec2016-01-261-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When mounting btrfs volume without subvol= and subvolid=, and the btrfs volume has default subvolume defined, mount() mounts the default subvolume and not the volume root as other filesystems do. To handle this situation correctly (for example for "mount -a"), libmount has to be capable to detect default subvolume. Add btrfs.c and btrfs.h that implement needed functions. This patch adds mnt_table_find_target_with_option() to the library API. Known problems not covered by this patch: - Use of subvolid= in fstab is not yet handled. - Use of type auto in combination with subvol= in fstab is not yet handled. - Use of btrfs in loop devices, where image file is specified in fstab is not yet handled (use of /dev/loop0 in fstab works). - If fstab uses subvol=, and subvol path changes since last "mount -a", subsequent "mount -a" will not recognize that it is already mounted, and it will attempt to mount it second time. To fix it, libmount should remember subvolid in time of mount (subvolid is unique for the subvolume, subvol is not). - mountinfo contains subvol and subvolid since kernel 4.2. Before kernel 4.2, there is no reasonable way to solve this situation. (One would create temporary mount point, mount the default, call needed ioctl() to determine what was mounted, deduce the default subvolume, compare it with subvolume of mounted volume, unmount and return result.) How to reproduce: truncate -s1G btrfs_test.img mkdir -p btrfs_mnt /sbin/mkfs.btrfs -f -d single -m single ./btrfs_test.img mount -o loop btrfs_test.img btrfs_mnt pushd . cd btrfs_mnt mkdir -p d0/dd0/ddd0 cd d0/dd0/ddd0 touch file{1..5} btrfs subvol create s1 cd s1 touch file{1..5} mkdir -p d1/dd1/ddd1 cd d1/dd1/ddd1 btrfs subvol create s2 rid=$(btrfs inspect rootid s2) echo new default $rid btrfs subvol get-default . btrfs subvol set-default $rid . popd umount btrfs_mnt losetup /dev/loop0 $PWD/btrfs_test.img echo "/dev/loop0 $PWD/btrfs_mnt btrfs defaults 0 0" >>/etc/fstab mount -a mount -a umount btrfs_mnt sed -i "/\/dev\/loop0/d" /etc/fstab losetup -d /dev/loop0 rm btrfs_test.img rmdir btrfs_mnt Current behavior: mount: /dev/loop0 is already mounted or /root/btrfs_mnt busy /dev/loop0 is already mounted on /root/btrfs_mnt Expected behavior is to ignore already mounted FS. [kzak@redhat.com: - make 'var' optional for mnt_table_find_target_with_option(), - add mnt_table_find_target_with_option() to symbols table and docs - add "btrfs" string between supported debug modes - minor coding style changes] Signed-off-by: Stanislav Brabec <sbrabec@suse.cz> Cc: David Štěrba <dsterba@suse.cz> Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add support for MS_LAZYTIMEKarel Zak2015-03-301-0/+4
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add options map to docsKarel Zak2015-01-261-3/+6
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: cleanup gtk-docs warningsKarel Zak2015-01-131-1/+1
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* linmount: (monitor) refresh docs, headers and symbols tableKarel Zak2015-01-061-0/+2
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: (monitor) add kernel mountninfo monitoringKarel Zak2015-01-061-1/+0Star
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: (monitor) cleanup wait/verify stuffKarel Zak2015-01-061-1/+13
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: make public top-level monitor FD onlyKarel Zak2015-01-061-1/+1
| | | | | | | | | | | | | | | | | | | We need full control on changes evaluation, so it's better to hide all in our private epoll. This change also significantly simplify the API. mn = mnt_new_monitor(); mnt_monitor_enable_userapce(mn, TRUE, NULL); mnt_monitor_enable_kenrel(mn, TRUE); fd = mnt_monitor_get_fd(mn); ... <use 'fd' in epoll controlled by your application> ... while (mnt_monitor_next_changed(mn, &filename, NULL) == 0) printf("%s: change detected\n", filename); Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: split monitor initializationKarel Zak2015-01-061-4/+3Star
| | | | | | | The patch introduces mnt_monitor_enable_*() functions (now for userspace only) to make the API easy to use for high-level purpose. Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add new libmnt_monitor APIKarel Zak2014-12-051-0/+18
| | | | | | | | | | | | It's usually enough to us [e]poll() to monitor kernel mount table, but there is no way how to monitor changes in userspace mount options (e.g. _netdev). The management of these mount options is completely hidden in libmount and /rub/mount/utab is private libmount file. This patch introduces new libmnt_mount API to monitor also userspace mount table. Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: provide version as int for better compiletime testSøren Holm2014-10-141-0/+3
| | | | Signed-off-by: Søren Holm <sgh@sgh.dk>
* libmount: adjust the ordering of a #define and tweak some commentsBenno Schulenberg2014-07-141-11/+10Star
| | | | Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
* libmount: mnt_resolve_target: tiptoe around active mount pointsEric Rannaud2014-07-011-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | Current code in mnt_fs_match_target() and mnt_table_find_target() already does not canonicalize active mount points (when read from mountinfo), because they are already canonicalized by the kernel. Calling realpath(fs->target) on a mount point can hang -- e.g. if the NFS server is unreachable. This patch optionally extends this strategy to the general case, that is when @fs does not directly come from the kernel through mountinfo (for instance, it may have been parsed from /etc/fstab). Given @mtab parsed from mountinfo, and if mnt_cache_set_targets(cache, mtab) is used, then mnt_fs_match_target() and mnt_table_find_target() check whether @fs->target is a known mount point in the cached mountinfo, before attempting to canonicalize @fs->target, no matter where @fs itself comes from. If found in the cached mountinfo, @fs->target is not canonicalized. [kzak@redhat.com: - don't allocate libmnt_iter, - add docs for mnt_cache_set_targets(), - fallback to mnt_resolve_path() if no cache->mtab specified, - use streq_except_trailing_slash() to compare paths] Signed-off-by: Eric Rannaud <e@nanocritical.com> Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add mnt_table_uniq_fs()Karel Zak2013-12-111-0/+9
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add mnt_tag_is_valid()Karel Zak2013-11-191-0/+1
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: update docsKarel Zak2013-09-271-2/+2
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add reference counter to libmnt_tableKarel Zak2013-08-211-0/+3
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add reference counting to libmnt_cacheKarel Zak2013-08-211-0/+3
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add reference counting to libmount_fsKarel Zak2013-08-211-0/+2
| | | | | | | | | | | | | | | | | | | | * mnt_new_fs() returns object with refcount=1 * mnt_free_fs() does not care about reference counter * new functions mnt_ref_fs() and mnt_unref_fs() * mnt_table_add_fs() and mnt_table_rem_fs() uses reference counter * libmmnt_context uses reference counter for internal FS (as it could be shared outside the context) * backwardly incompatible change: - FS could be deallocated after mnt_table_remove_fs() * it's recommended to use mnt_unref_fs() after mnt_table_add_fs() Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add function for context userdataKarel Zak2013-08-211-0/+4
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add mnt_table_is_empty(), improve table list usageKarel Zak2013-08-201-0/+1
| | | | | | | | Currently you have to use mnt_table_remove_fs() + mnt_free_fs() to destroy the list in the table. This is complicated in same situations. This patch allows to use mnt_free_fs() only. Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add mnt_table_{first,last}_fs()Karel Zak2013-08-201-0/+2
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add mnt_table_{set,get}_userdata()Karel Zak2013-08-201-0/+3
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add mnt_table_with_comments()Karel Zak2013-08-201-0/+1
| | | | Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: fix typosOndrej Oprala2013-08-051-3/+3
| | | | Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
* libmount: add missing declarations to libmount.h.in and documentationOndrej Oprala2013-08-011-0/+3
| | | | Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
* libmount: change tailing to trailing in *_tailing_comments functionsOndrej Oprala2013-08-011-3/+3
| | | | Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
* libmount: add functions to handle comments in fs tablesOndrej Oprala2013-07-031-0/+13
| | | | | | Co-Author: Karel Zak <kzak@redhat.com> Signed-off-by: Ondrej Oprala <ooprala@redhat.com> Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: fix mount.nfs segfault, rely on assert() rather than on nonnullKarel Zak2013-04-121-132/+70Star
| | | | | | | | | | | | | | | | | We use mnt_optstr_append_option(&o, mnt_fs_get_vfs_options(fs), NULL); in mount.nfs, unfortunately mnt_optstr_append_option() has been marked ass nonnull(1, 2). That's wrong because append and prepend should robust enough to accept NULL as option name. The patch also removes almost all __attribute__((nonnull). It seems better to rely on assert() to have usable feedback. In many cases (nonnull) is premature optimization for the library. This attribute makes sense for things like strlen() or so... Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=948274 Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: add mnt_table_find_mountpoint()Karel Zak2013-03-251-0/+2
| | | | | | | | This is more robust implementation of mnt_get_mountpoint() that does not ignore bind mountpoints (mount --bind /mnt /mnt) as it does not depend on st_dev numbers. Signed-off-by: Karel Zak <kzak@redhat.com>
* libmount: make libmount.h consistent with codeKarel Zak2013-03-251-16/+8Star
| | | | | | | | The function with nonnull attribute are silently optimized by gcc so all "if (foo)" are removed if the "foo" is expected as non-null. It make the code less usable and robust in some situations. Signed-off-by: Karel Zak <kzak@redhat.com>
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