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/linux/Documentation/filesystems/
H A Dsysv-fs.rst8 - Xenix FS,
9 - SystemV/386 FS,
10 - Coherent FS.
30 - Coherent FS:
36 - SystemV Release 2 FS:
40 for this FS on hard disk yet.
43 These filesystems are rather similar. Here is a comparison with Minix FS:
47 - Minix FS 0x81 Linux/Minix
48 - Xenix FS ??
49 - SystemV FS ??
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H A Dfsverity.rst6 fs-verity: read-only file-based authenticity protection
12 fs-verity (``fs/verity/``) is a support layer that filesystems can
16 code is needed to support fs-verity.
18 fs-verity is similar to `dm-verity
21 filesystems supporting fs-verity, userspace can execute an ioctl that
30 the "fs-verity file digest", which is a hash that includes the Merkle
31 tree root hash) that fs-verity is enforcing for the file. This ioctl
34 fs-verity is essentially a way to hash a file in constant time,
41 By itself, fs-verity only provides integrity protection, i.e.
44 However, because fs-verity makes retrieving the file hash extremely
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/linux/Documentation/arch/x86/x86_64/
H A Dfsgs.rst3 Using FS and GS segments in user space applications
21 In 64-bit mode the CS/SS/DS/ES segments are ignored and the base address is
22 always 0 to provide a full 64bit address space. The FS and GS segments are
23 still functional in 64-bit mode.
25 Common FS and GS usage
28 The FS segment is commonly used to address Thread Local Storage (TLS). FS
31 thread and the compiler emits the FS: address prefix for accesses to these
32 variables. Each thread has its own FS base address so common code can be
34 instances. Applications should not use FS for other purposes when they use
35 runtimes or threading libraries which manage the per thread FS.
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/linux/Documentation/admin-guide/cgroup-v1/
H A Dhugetlb.rst7 # mount -t cgroup -o hugetlb none /sys/fs/cgroup
10 visible at /sys/fs/cgroup. At bootup, this group includes all the tasks in
11 the system. /sys/fs/cgroup/tasks lists the tasks in this cgroup.
13 New groups can be created under the parent group /sys/fs/cgroup::
15 # cd /sys/fs/cgroup
34 For a system supporting three hugepage sizes (64k, 32M and 1G), the control
46 hugetlb.64KB.limit_in_bytes
47 hugetlb.64KB.max_usage_in_bytes
48 hugetlb.64KB.numa_stat
49 hugetlb.64KB.usage_in_bytes
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/linux/arch/x86/include/uapi/asm/
H A Dsigcontext.h139 * The 64-bit FPU frame. (FXSAVE format and later)
160 __u32 xmm_space[64]; /* 16x XMM registers, 16 bytes each */
182 __u32 ymmh_space[64];
204 __u16 fs, __fsh; member
236 * The 64-bit signal frame:
259 __u16 fs; member
302 __u16 fs, __fsh; member
347 * Prior to 2.5.64 ("[PATCH] x86-64 updates for 2.5.64-bk3"),
348 * Linux saved and restored fs and gs in these slots. This
354 * - Some DOSEMU versions stash fs and gs in these slots manually,
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/linux/tools/lib/api/fs/
H A Dfs.c18 #include "fs.h"
87 "/sys/fs/bpf",
91 struct fs { struct
103 static void fs__init_once(struct fs *fs); argument
104 static const char *fs__mountpoint(const struct fs *fs);
105 static const char *fs__mount(struct fs *fs);
107 #define FS(lower_name, fs_name, upper_name) \ macro
108 static struct fs fs__##lower_name = { \
117 struct fs *fs = &fs__##lower_name; \
119 fs__init_once(fs); \
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/linux/fs/
H A DKconfig35 source "fs/ext2/Kconfig"
36 source "fs/ext4/Kconfig"
37 source "fs/jbd2/Kconfig"
46 source "fs/reiserfs/Kconfig"
47 source "fs/jfs/Kconfig"
49 source "fs/xfs/Kconfig"
50 source "fs/gfs2/Kconfig"
51 source "fs/ocfs2/Kconfig"
52 source "fs/btrfs/Kconfig"
53 source "fs/nilfs2/Kconfig"
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/linux/Documentation/filesystems/ext4/
H A Dgroup_descr.rst29 In ext2, ext3, and ext4 (when the 64bit feature is not enabled), the
31 bg_checksum. On an ext4 filesystem with the 64bit feature enabled, the
32 block group descriptor expands to at least the 64 bytes described below;
36 checksum is the crc16 of the FS UUID, the group number, and the group
38 checksum is the lower 16 bits of the checksum of the FS UUID, the group
40 checksums are calculated against the FS UUID, the group number, and the
111 - These fields only exist if the 64bit feature is enabled and s_desc_size
156 - Padding to 64 bytes.
163 :widths: 16 64
/linux/drivers/spi/
H A Dspi-sh-msiof.c103 #define SIMDR2_WDLEN1(i) (((i) - 1) << 16) /* Word Count (1-64/256 (SH, A1))) */
139 #define SIFCTR_TFWM_64 (0UL << 29) /* Transfer Request when 64 empty stages */
156 #define SIFCTR_RFWM_64 (5 << 13) /* Transfer Request when 64 valid stages */
414 const void *tx_buf, int words, int fs) in sh_msiof_spi_write_fifo_8() argument
420 sh_msiof_write(p, SITFDR, buf_8[k] << fs); in sh_msiof_spi_write_fifo_8()
424 const void *tx_buf, int words, int fs) in sh_msiof_spi_write_fifo_16() argument
430 sh_msiof_write(p, SITFDR, buf_16[k] << fs); in sh_msiof_spi_write_fifo_16()
434 const void *tx_buf, int words, int fs) in sh_msiof_spi_write_fifo_16u() argument
440 sh_msiof_write(p, SITFDR, get_unaligned(&buf_16[k]) << fs); in sh_msiof_spi_write_fifo_16u()
444 const void *tx_buf, int words, int fs) in sh_msiof_spi_write_fifo_32() argument
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/linux/arch/x86/kernel/
H A Dprocess_64.c8 * X86-64 port
23 #include <linux/fs.h>
71 unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L, fs, gs, shadowgs; in __show_regs() local
98 rdmsrl(MSR_FS_BASE, fs); in __show_regs()
101 log_lvl, fs, shadowgs); in __show_regs()
107 asm("movl %%fs,%0" : "=r" (fsindex)); in __show_regs()
110 rdmsrl(MSR_FS_BASE, fs); in __show_regs()
120 log_lvl, fs, fsindex, gs, gsindex, shadowgs); in __show_regs()
152 FS, enumerator
230 * Saves the FS or GS base for an outgoing thread if FSGSBASE extensions are
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/linux/arch/x86/include/asm/
H A Dstackprotector.h12 * x86_64, percpu symbols are zero based and %gs (64-bit) points to the
18 * Putting percpu data in %fs on 32-bit is a minor optimization compared to
19 * using %gs. Since 32-bit userspace normally has %fs == 0, we are likely
20 * to load 0 into %fs on exit to usermode, whereas with percpu data in
23 * Once we are willing to require GCC 8.1 or better for 64-bit stackprotector
H A Dsegment.h74 * 7 - TLS segment #2 [ Wine's %fs Win32 segment ]
165 #else /* 64-bit: */
177 * GDT layout to get 64-bit SYSCALL/SYSRET support right. SYSRET hardcodes
181 * if returning to 64-bit userspace: cs = STAR.SYSRET_CS+16,
185 * thus USER_DS should be between 32-bit and 64-bit code selectors:
301 * This is always the case on Intel CPUs and, even on 64-bit AMD CPUs, any
303 * FS and GS.
322 * On 32-bit systems, the hidden parts of FS and GS are unobservable if
325 #define __loadsegment_fs(value) __loadsegment_simple(fs, (value))
333 "1: movw %0, %%fs \n" in __loadsegment_fs()
/linux/include/uapi/linux/
H A Dqnx4_fs.h27 #define QNX4_Z_MAP_SLOTS 64
28 #define QNX4_VALID_FS 0x0001 /* Clean fs. */
29 #define QNX4_ERROR_FS 0x0002 /* fs has errors. */
32 #define QNX4_DIR_ENTRY_SIZE 0x040 /* dir entry size of 64 bytes */
35 #define QNX4_INODES_PER_BLOCK 0x08 /* 512 / 64 */
H A Dfsverity.h3 * fs-verity user API
5 * These ioctls can be used on filesystems that support fs-verity. See the
38 * Struct containing a file's Merkle tree properties. The fs-verity file digest
40 * needs to compute fs-verity file digests itself, e.g. in order to sign files.
41 * It isn't needed just to enable fs-verity on a file.
58 __u8 root_hash[64]; /* Merkle tree root hash */
67 * Format in which fs-verity file digests are signed in built-in signatures.
74 * is optional. fs-verity users may also verify signatures in userspace, in
H A Dminix_fs.h25 #define MINIX_Z_MAP_SLOTS 64
26 #define MINIX_VALID_FS 0x0001 /* Clean fs. */
27 #define MINIX_ERROR_FS 0x0002 /* fs has errors. */
49 * now 16-bit. The inode is now 64 bytes instead of 32.
/linux/Documentation/translations/zh_CN/dev-tools/
H A Dkcov.rst66 #define COVER_SIZE (64<<10)
117 fs/read_write.c:562
119 fs/file.c:774
121 fs/file.c:746
123 fs/file.c:750
125 fs/file.c:760
127 fs/file.c:784
129 fs/read_write.c:562
148 /* 每次记录的 64 位字的数量。 */
291 #define COVER_SIZE (64 << 10)
/linux/Documentation/devicetree/bindings/sound/
H A Daudio-graph-port.yaml20 mclk-fs:
21 $ref: simple-card.yaml#/definitions/mclk-fs
43 mclk-fs:
44 $ref: simple-card.yaml#/definitions/mclk-fs
101 maximum: 64
109 maximum: 64
/linux/fs/netfs/
H A Dfscache_main.c30 * (32*64) (32*31/2 * 64)
63 * initialise the fs caching module
86 pr_notice("FS-Cache loaded\n"); in fscache_init()
108 pr_notice("FS-Cache unloaded\n"); in fscache_exit()
/linux/samples/bpf/
H A Dtc_l2_redirect.sh31 $IP -n ns1 addr add 2401:db01::65/64 dev vens1 nodad
38 $IP -n ns2 addr add 2401:db02::66/64 dev vens2 nodad
40 $IP -n ns2 addr add 2401:face::66/64 dev lo nodad
53 $IP -n ns2 route add 2401:db01::/64 dev ip6t2
59 $IP addr add 2401:db01::1/64 dev ve1 nodad
61 $IP addr add 2401:db02::1/64 dev ve2 nodad
83 rm -f /sys/fs/bpf/tc/globals/tun_iface
109 $REDIRECT_USER -U /sys/fs/bpf/tc/globals/tun_iface -i $(< /sys/class/net/ipt/ifindex)
138 $IP route add 2401:face::/64 via 2401:db02::66 dev ve2
146 $REDIRECT_USER -U /sys/fs/bpf/tc/globals/tun_iface -i $(< /sys/class/net/ip6t/ifindex)
/linux/drivers/net/ethernet/chelsio/cxgb4/
H A Dcxgb4_tc_flower.h48 struct ch_filter_specification fs; member
68 IP6_SRC_95_64, /* src bits 95.. 64 */
73 IP6_DST_95_64, /* dst bits 95.. 64 */
128 struct ch_filter_specification *fs);
142 struct ch_filter_specification *fs, u32 *tid);
144 struct ch_filter_specification *fs, int tid);
/linux/include/math-emu/
H A Dop-common.h36 #define _FP_UNPACK_CANONICAL(fs, wc, X) \ argument
41 _FP_FRAC_HIGH_RAW_##fs(X) |= _FP_IMPLBIT_##fs; \
43 X##_e -= _FP_EXPBIAS_##fs; \
55 _shift -= _FP_FRACXBITS_##fs; \
57 X##_e -= _FP_EXPBIAS_##fs - 1 + _shift; \
68 case _FP_EXPMAX_##fs: \
75 if (!(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \
89 #define _FP_PACK_CANONICAL(fs, wc, X) \ argument
94 X##_e += _FP_EXPBIAS_##fs; \
98 if (_FP_FRAC_OVERP_##wc(fs, X)) \
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/linux/Documentation/admin-guide/
H A Dxfs.rst26 doing delayed allocation writeout (default size is 64KiB).
95 systems and applications, since 64 bits inode numbers might
132 include 65536 (64k), 131072 (128k) and 262144 (256k). The
268 fs.xfs.stats_clear (Min: 0 Default: 0 Max: 1)
270 in /proc/fs/xfs/stat. It then immediately resets to "0".
272 fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000)
276 fs.xfs.filestream_centisecs (Min: 1 Default: 3000 Max: 360000)
281 fs.xfs.speculative_prealloc_lifetime
288 fs.xfs.speculative_cow_prealloc_lifetime
291 fs.xfs.error_level (Min: 0 Default: 3 Max: 11)
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/linux/sound/soc/meson/
H A Daiu-encoder-i2s.c149 unsigned int fs, bs; in aiu_encoder_i2s_set_clocks() local
153 fs = DIV_ROUND_CLOSEST(clk_get_rate(aiu->i2s.clks[MCLK].clk), srate); in aiu_encoder_i2s_set_clocks()
155 if (fs % 64) in aiu_encoder_i2s_set_clocks()
167 64 - 1)); in aiu_encoder_i2s_set_clocks()
169 bs = fs / 64; in aiu_encoder_i2s_set_clocks()
/linux/fs/smb/client/
H A Dexport.c15 * and examples in fs/exportfs
24 * could be improved by using a new routine which expects 64 bit inode numbers
25 * instead of the default 32 bit routines in fs/exportfs
29 #include <linux/fs.h>
/linux/tools/testing/selftests/core/
H A Dunshare_test.c34 fd = open("/proc/sys/fs/nr_open", O_RDWR); in TEST()
45 /* bump fs.nr_open */ in TEST()
59 /* get a descriptor past the old fs.nr_open */ in TEST()
60 EXPECT_GE(dup2(2, nr_open + 64), 0) { in TEST()
77 /* restore fs.nr_open */ in TEST()

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