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linux/fs/xfs
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Darrick J. Wong aafe12cee0 xfs: don't trip over negative free space in xfs_reserve_blocks 
If we somehow end up with a filesystem that has fewer free blocks than
the blocks set aside to avoid ENOSPC deadlocks, it's possible that the
free space calculation in xfs_reserve_blocks will spit out a negative
number (because percpu_counter_sum returns s64).  We fail to notice
this negative number and set fdblks_delta to it.  Now we increment
fdblocks(!) and the unsigned type of m_resblks means that we end up
setting a ridiculously huge m_resblks reservation.

Avoid this comedy of errors by detecting the negative free space and
returning -ENOSPC.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2018-06-24 11:56:36 -07:00
..
libxfs
xfs: More robust inode extent count validation
2018-06-21 23:25:57 -07:00
scrub
xfs: move various type verifiers to common file
2018-06-08 10:07:51 -07:00
Kconfig
xfs: implement the metadata repair ioctl flag
2018-05-15 18:12:50 -07:00
kmem.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
kmem.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
Makefile
xfs: move various type verifiers to common file
2018-06-08 10:07:51 -07:00
mrlock.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_acl.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_acl.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_aops.c
Changes since last update:
2018-06-12 15:49:00 -07:00
xfs_aops.h
Changes since last update:
2018-06-12 15:49:00 -07:00
xfs_attr_inactive.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_attr_list.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_attr.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_bmap_item.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_bmap_item.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_bmap_util.c
xfs: simplify xfs_bmap_punch_delalloc_range
2018-06-21 23:24:38 -07:00
xfs_bmap_util.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_buf_item.c
xfs: clean up MIN/MAX
2018-06-08 10:07:52 -07:00
xfs_buf_item.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_buf.c
xfs: xfs_reflink_convert_cow() memory allocation deadlock
2018-06-08 10:07:51 -07:00
xfs_buf.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_dir2_readdir.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_discard.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_discard.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xfs_dquot_item.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_dquot_item.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_dquot.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_dquot.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_error.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_error.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_export.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_export.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_extent_busy.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_extent_busy.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_extfree_item.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_extfree_item.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_file.c
Changes since last update:
2018-06-12 15:49:00 -07:00
xfs_filestream.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_filestream.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_fsmap.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_fsmap.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_fsops.c
xfs: don't trip over negative free space in xfs_reserve_blocks
2018-06-24 11:56:36 -07:00
xfs_fsops.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_globals.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_icache.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_icache.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_icreate_item.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_icreate_item.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_inode_item.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_inode_item.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_inode.c
xfs: xfs_iflush_abort() can be called twice on cluster writeback failure
2018-06-21 23:31:38 -07:00
xfs_inode.h
Changes since last update:
2018-06-12 15:49:00 -07:00
xfs_ioctl32.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_ioctl32.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_ioctl.c
Changes since last update:
2018-06-12 15:49:00 -07:00
xfs_ioctl.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_iomap.c
xfs: clean up MIN/MAX
2018-06-08 10:07:52 -07:00
xfs_iomap.h
xfs: replace do_mod with native operations
2018-06-08 10:07:52 -07:00
xfs_iops.c
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
xfs_iops.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_itable.c
xfs: clean up MIN/MAX
2018-06-08 10:07:52 -07:00
xfs_itable.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_linux.h
xfs: replace do_mod with native operations
2018-06-08 10:07:52 -07:00
xfs_log_cil.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_log_priv.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_log_recover.c
xfs: replace do_mod with native operations
2018-06-08 10:07:52 -07:00
xfs_log.c
xfs: clean up MIN/MAX
2018-06-08 10:07:52 -07:00
xfs_log.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_message.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_message.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xfs_mount.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_mount.h
xfs: clean up MIN/MAX
2018-06-08 10:07:52 -07:00
xfs_mru_cache.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_mru_cache.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_ondisk.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_pnfs.c
xfs: prepare xfs_break_layouts() for another layout type
2018-05-22 07:19:08 -07:00
xfs_pnfs.h
xfs: prepare xfs_break_layouts() for another layout type
2018-05-22 07:19:08 -07:00
xfs_qm_bhv.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_qm_syscalls.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_qm.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_qm.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_quota.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_quotaops.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_refcount_item.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_refcount_item.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_reflink.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_reflink.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_rmap_item.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_rmap_item.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_rtalloc.c
xfs: replace do_mod with native operations
2018-06-08 10:07:52 -07:00
xfs_rtalloc.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_stats.c
Changes since last update:
2018-06-12 15:49:00 -07:00
xfs_stats.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_super.c
Changes since last update:
2018-06-12 15:49:00 -07:00
xfs_super.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_symlink.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_symlink.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_sysctl.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_sysctl.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_sysfs.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_sysfs.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trace.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trace.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trans_ail.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trans_bmap.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trans_buf.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trans_dquot.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trans_extfree.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trans_inode.c
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
xfs_trans_priv.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trans_refcount.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trans_rmap.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_trans.c
xfs: allow empty transactions while frozen
2018-06-24 11:56:35 -07:00
xfs_trans.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs_xattr.c
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00
xfs.h
xfs: convert to SPDX license tags
2018-06-06 14:17:53 -07:00