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yaml
---
r: 108239
b: refs/heads/master
c: 866c366
h: refs/heads/master
i:
  108237: f7a5bb4
  108235: ae822bf
  108231: cfcca09
  108223: 86e16d2
v: v3
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Jan Kara authored and Linus Torvalds committed Aug 12, 2008
1 parent af67d09 commit 297acbd
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2 changes: 1 addition & 1 deletion [refs]
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refs/heads/master: caff3a2c333e11a794308bd9a875a09b94fee24a
refs/heads/master: 866c36637f79506b283a6872a7c313b5ef499985
22 changes: 14 additions & 8 deletions trunk/Documentation/filesystems/quota.txt
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Expand Up @@ -3,14 +3,14 @@ Quota subsystem
===============

Quota subsystem allows system administrator to set limits on used space and
number of used inodes (inode is a filesystem structure which is associated
with each file or directory) for users and/or groups. For both used space and
number of used inodes there are actually two limits. The first one is called
softlimit and the second one hardlimit. An user can never exceed a hardlimit
for any resource. User is allowed to exceed softlimit but only for limited
period of time. This period is called "grace period" or "grace time". When
grace time is over, user is not able to allocate more space/inodes until he
frees enough of them to get below softlimit.
number of used inodes (inode is a filesystem structure which is associated with
each file or directory) for users and/or groups. For both used space and number
of used inodes there are actually two limits. The first one is called softlimit
and the second one hardlimit. An user can never exceed a hardlimit for any
resource (unless he has CAP_SYS_RESOURCE capability). User is allowed to exceed
softlimit but only for limited period of time. This period is called "grace
period" or "grace time". When grace time is over, user is not able to allocate
more space/inodes until he frees enough of them to get below softlimit.

Quota limits (and amount of grace time) are set independently for each
filesystem.
Expand Down Expand Up @@ -53,6 +53,12 @@ in parentheses):
QUOTA_NL_BSOFTLONGWARN - space (block) softlimit is exceeded
longer than given grace period.
QUOTA_NL_BSOFTWARN - space (block) softlimit
- four warnings are also defined for the event when user stops
exceeding some limit:
QUOTA_NL_IHARDBELOW - inode hardlimit
QUOTA_NL_ISOFTBELOW - inode softlimit
QUOTA_NL_BHARDBELOW - space (block) hardlimit
QUOTA_NL_BSOFTBELOW - space (block) softlimit
QUOTA_NL_A_DEV_MAJOR (u32)
- major number of a device with the affected filesystem
QUOTA_NL_A_DEV_MINOR (u32)
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