70a5db5822
Fixes more or less: https://bugs.freedesktop.org/show_bug.cgi?id=67474
125 lines
4.1 KiB
C
125 lines
4.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <sys/quota.h>
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#include "blockdev-util.h"
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#include "btrfs-util.h"
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#include "errno-util.h"
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#include "format-util.h"
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#include "homework-quota.h"
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#include "missing_magic.h"
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#include "quota-util.h"
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#include "stat-util.h"
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#include "user-util.h"
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int home_update_quota_btrfs(UserRecord *h, const char *path) {
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int r;
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assert(h);
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assert(path);
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if (h->disk_size == UINT64_MAX)
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return 0;
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/* If the user wants quota, enable it */
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r = btrfs_quota_enable(path, true);
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if (r == -ENOTTY)
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return log_error_errno(r, "No btrfs quota support on subvolume %s.", path);
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if (r < 0)
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return log_error_errno(r, "Failed to enable btrfs quota support on %s.", path);
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r = btrfs_qgroup_set_limit(path, 0, h->disk_size);
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if (r < 0)
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return log_error_errno(r, "Faled to set disk quota on subvolume %s: %m", path);
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log_info("Set btrfs quota.");
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return 0;
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}
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int home_update_quota_classic(UserRecord *h, const char *path) {
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struct dqblk req;
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dev_t devno;
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int r;
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assert(h);
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assert(uid_is_valid(h->uid));
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assert(path);
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if (h->disk_size == UINT64_MAX)
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return 0;
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r = get_block_device(path, &devno);
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if (r < 0)
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return log_error_errno(r, "Failed to determine block device of %s: %m", path);
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if (devno == 0)
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return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "File system %s not backed by a block device.", path);
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r = quotactl_devno(QCMD_FIXED(Q_GETQUOTA, USRQUOTA), devno, h->uid, &req);
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if (r < 0) {
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if (ERRNO_IS_NOT_SUPPORTED(r))
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return log_error_errno(r, "No UID quota support on %s.", path);
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if (r != -ESRCH)
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return log_error_errno(r, "Failed to query disk quota for UID " UID_FMT ": %m", h->uid);
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zero(req);
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} else {
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/* Shortcut things if everything is set up properly already */
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if (FLAGS_SET(req.dqb_valid, QIF_BLIMITS) && h->disk_size / QIF_DQBLKSIZE == req.dqb_bhardlimit) {
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log_info("Configured quota already matches the intended setting, not updating quota.");
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return 0;
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}
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}
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req.dqb_valid = QIF_BLIMITS;
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req.dqb_bsoftlimit = req.dqb_bhardlimit = h->disk_size / QIF_DQBLKSIZE;
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r = quotactl_devno(QCMD_FIXED(Q_SETQUOTA, USRQUOTA), devno, h->uid, &req);
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if (r < 0) {
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if (r == -ESRCH)
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return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "UID quota not available on %s.", path);
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return log_error_errno(r, "Failed to set disk quota for UID " UID_FMT ": %m", h->uid);
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}
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log_info("Updated per-UID quota.");
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return 0;
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}
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int home_update_quota_auto(UserRecord *h, const char *path) {
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struct statfs sfs;
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int r;
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assert(h);
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if (h->disk_size == UINT64_MAX)
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return 0;
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if (!path) {
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path = user_record_image_path(h);
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if (!path)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Home record lacks image path.");
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}
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if (statfs(path, &sfs) < 0)
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return log_error_errno(errno, "Failed to statfs() file system: %m");
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if (is_fs_type(&sfs, XFS_SB_MAGIC) ||
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is_fs_type(&sfs, EXT4_SUPER_MAGIC))
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return home_update_quota_classic(h, path);
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if (is_fs_type(&sfs, BTRFS_SUPER_MAGIC)) {
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r = btrfs_is_subvol(path);
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if (r < 0)
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return log_error_errno(errno, "Failed to test if %s is a subvolume: %m", path);
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if (r == 0)
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return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Directory %s is not a subvolume, cannot apply quota.", path);
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return home_update_quota_btrfs(h, path);
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}
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return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Type of directory %s not known, cannot apply quota.", path);
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}
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