Lines Matching +full:files +full:- +full:based
13 ------------------------------------------------------------------------------
15 This file contains documentation for the sysctl files in
18 The files in this directory can be used to tune and monitor
20 kernel. Since some of the files _can_ be used to screw up your
27 Currently, these files are in /proc/sys/fs:
29 - aio-max-nr
30 - aio-nr
31 - dentry-state
32 - dquot-max
33 - dquot-nr
34 - file-max
35 - file-nr
36 - inode-max
37 - inode-nr
38 - inode-state
39 - nr_open
40 - overflowuid
41 - overflowgid
42 - pipe-user-pages-hard
43 - pipe-user-pages-soft
44 - protected_fifos
45 - protected_hardlinks
46 - protected_regular
47 - protected_symlinks
48 - suid_dumpable
49 - super-max
50 - super-nr
53 aio-nr & aio-max-nr
54 -------------------
56 aio-nr is the running total of the number of events specified on the
57 io_setup system call for all currently active aio contexts. If aio-nr
58 reaches aio-max-nr then io_setup will fail with EAGAIN. Note that
59 raising aio-max-nr does not result in the pre-allocation or re-sizing
63 dentry-state
64 ------------
89 negative dentries which do not map to any files. Instead,
90 they help speeding up rejection of non-existing files provided
94 dquot-max & dquot-nr
95 --------------------
97 The file dquot-max shows the maximum number of cached disk
100 The file dquot-nr shows the number of allocated disk quota
108 file-max & file-nr
109 ------------------
111 The value in file-max denotes the maximum number of file-
118 file-nr denote the number of allocated file handles, the number
121 file handles -- this is not an error, it just means that the
125 Attempts to allocate more file descriptors than file-max are
126 reported with printk, look for "VFS: file-max limit <number>
131 -------
133 This denotes the maximum number of file-handles a process can
139 inode-max, inode-nr & inode-state
140 ---------------------------------
145 The value in inode-max denotes the maximum number of inode
146 handlers. This value should be 3-4 times larger than the value
147 in file-max, since stdin, stdout and network sockets also
151 The file inode-nr contains the first two items from
152 inode-state, so we'll skip to that file...
154 Inode-state contains three actual numbers and four dummies.
159 allocated, this can be slightly more than inode-max because
163 preshrink is nonzero when the nr_inodes > inode-max and the
169 -------------------------
171 Some filesystems only support 16-bit UIDs and GIDs, although in Linux
180 pipe-user-pages-hard
181 --------------------
183 Maximum total number of pages a non-privileged user may allocate for pipes.
189 pipe-user-pages-soft
190 --------------------
192 Maximum total number of pages a non-privileged user may allocate for pipes
202 ---------------
205 an attacker-controlled FIFO, where a program expected to create a regular
216 This protection is based on the restrictions in Openwall.
220 --------------------
222 A long-standing class of security issues is the hardlink-based
223 time-of-check-time-of-use race, most commonly seen in world-writable
228 from "pinning" vulnerable setuid/setgid files against being upgraded by
229 the administrator, or linking to special files.
236 This protection is based on the restrictions in Openwall and grsecurity.
240 -----------------
243 avoids writes to an attacker-controlled regular file, where a program
246 When set to "0", writing to regular files is unrestricted.
248 When set to "1" don't allow O_CREAT open on regular files that we
256 ------------------
258 A long-standing class of security issues is the symlink-based
259 time-of-check-time-of-use race, most commonly seen in world-writable
264 https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=/tmp
269 a sticky world-writable directory, or when the uid of the symlink and
272 This protection is based on the restrictions in Openwall and grsecurity.
276 --------------
293 details on this limitation, see CVE-2006-2451.) This mode is
304 super-max & super-nr
305 --------------------
309 can have. You only need to increase super-max if you need to
310 mount more filesystems than the current value in super-max
314 aio-nr & aio-max-nr
315 -------------------
317 aio-nr shows the current system-wide number of asynchronous io
318 requests. aio-max-nr allows you to change the maximum value
319 aio-nr can grow to.
322 mount-max
323 ---------
333 Documentation for the files in /proc/sys/fs/binfmt_misc is
334 in Documentation/admin-guide/binfmt-misc.rst.
337 3. /proc/sys/fs/mqueue - POSIX message queues filesystem
343 API (as noted by the MSG tag in the POSIX 1003.1-2001 version of the System
369 4. /proc/sys/fs/epoll - Configuration options for the epoll interface
375 ----------------
377 Every epoll file descriptor can store a number of files to be monitored
378 for event readiness. Each one of these monitored files constitutes a "watch".