zonefs.h (34422914dc00b291d1c47dbdabe93b154c2f2b25) zonefs.h (aa7f243f32e1d18036ee00d71d3ccfad70ae2121)
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Simple zone file system for zoned block devices.
4 *
5 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
6 */
7#ifndef __ZONEFS_H__
8#define __ZONEFS_H__

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42#define ZONEFS_ZONE_INIT_MODE (1U << 0)
43#define ZONEFS_ZONE_OPEN (1U << 1)
44#define ZONEFS_ZONE_ACTIVE (1U << 2)
45#define ZONEFS_ZONE_OFFLINE (1U << 3)
46#define ZONEFS_ZONE_READONLY (1U << 4)
47#define ZONEFS_ZONE_CNV (1U << 31)
48
49/*
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Simple zone file system for zoned block devices.
4 *
5 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
6 */
7#ifndef __ZONEFS_H__
8#define __ZONEFS_H__

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42#define ZONEFS_ZONE_INIT_MODE (1U << 0)
43#define ZONEFS_ZONE_OPEN (1U << 1)
44#define ZONEFS_ZONE_ACTIVE (1U << 2)
45#define ZONEFS_ZONE_OFFLINE (1U << 3)
46#define ZONEFS_ZONE_READONLY (1U << 4)
47#define ZONEFS_ZONE_CNV (1U << 31)
48
49/*
50 * In-memory inode data.
50 * In-memory per-file inode zone data.
51 */
51 */
52struct zonefs_inode_info {
53 struct inode i_vnode;
52struct zonefs_zone {
53 /* Zone state flags */
54 unsigned int z_flags;
54
55
55 /* File zone start sector (512B unit) */
56 sector_t i_zsector;
56 /* Zone start sector (512B unit) */
57 sector_t z_sector;
57
58
58 /* File zone write pointer position (sequential zones only) */
59 loff_t i_wpoffset;
59 /* Zone size (bytes) */
60 loff_t z_size;
60
61
61 /* File maximum size */
62 loff_t i_max_size;
62 /* Zone capacity (file maximum size, bytes) */
63 loff_t z_capacity;
63
64
64 /* File zone size */
65 loff_t i_zone_size;
65 /* Write pointer offset in the zone (sequential zones only, bytes) */
66 loff_t z_wpoffset;
67};
66
68
69/*
70 * In memory zone group information: all zones of a group are exposed
71 * as files, one file per zone.
72 */
73struct zonefs_zone_group {
74 unsigned int g_nr_zones;
75 struct zonefs_zone *g_zones;
76};
77
78/*
79 * In-memory inode data.
80 */
81struct zonefs_inode_info {
82 struct inode i_vnode;
83
67 /*
68 * To serialise fully against both syscall and mmap based IO and
69 * sequential file truncation, two locks are used. For serializing
70 * zonefs_seq_file_truncate() against zonefs_iomap_begin(), that is,
71 * file truncate operations against block mapping, i_truncate_mutex is
72 * used. i_truncate_mutex also protects against concurrent accesses
73 * and changes to the inode private data, and in particular changes to
74 * a sequential file size on completion of direct IO writes.
75 * Serialization of mmap read IOs with truncate and syscall IO
76 * operations is done with invalidate_lock in addition to
77 * i_truncate_mutex. Only zonefs_seq_file_truncate() takes both lock
78 * (invalidate_lock first, i_truncate_mutex second).
79 */
80 struct mutex i_truncate_mutex;
81
82 /* guarded by i_truncate_mutex */
83 unsigned int i_wr_refcnt;
84 /*
85 * To serialise fully against both syscall and mmap based IO and
86 * sequential file truncation, two locks are used. For serializing
87 * zonefs_seq_file_truncate() against zonefs_iomap_begin(), that is,
88 * file truncate operations against block mapping, i_truncate_mutex is
89 * used. i_truncate_mutex also protects against concurrent accesses
90 * and changes to the inode private data, and in particular changes to
91 * a sequential file size on completion of direct IO writes.
92 * Serialization of mmap read IOs with truncate and syscall IO
93 * operations is done with invalidate_lock in addition to
94 * i_truncate_mutex. Only zonefs_seq_file_truncate() takes both lock
95 * (invalidate_lock first, i_truncate_mutex second).
96 */
97 struct mutex i_truncate_mutex;
98
99 /* guarded by i_truncate_mutex */
100 unsigned int i_wr_refcnt;
84 unsigned int i_flags;
85};
86
87static inline struct zonefs_inode_info *ZONEFS_I(struct inode *inode)
88{
89 return container_of(inode, struct zonefs_inode_info, i_vnode);
90}
91
101};
102
103static inline struct zonefs_inode_info *ZONEFS_I(struct inode *inode)
104{
105 return container_of(inode, struct zonefs_inode_info, i_vnode);
106}
107
92static inline bool zonefs_zone_is_cnv(struct zonefs_inode_info *zi)
108static inline bool zonefs_zone_is_cnv(struct zonefs_zone *z)
93{
109{
94 return zi->i_flags & ZONEFS_ZONE_CNV;
110 return z->z_flags & ZONEFS_ZONE_CNV;
95}
96
111}
112
97static inline bool zonefs_zone_is_seq(struct zonefs_inode_info *zi)
113static inline bool zonefs_zone_is_seq(struct zonefs_zone *z)
98{
114{
99 return !zonefs_zone_is_cnv(zi);
115 return !zonefs_zone_is_cnv(z);
100}
101
116}
117
118static inline struct zonefs_zone *zonefs_inode_zone(struct inode *inode)
119{
120 return inode->i_private;
121}
122
102static inline bool zonefs_inode_is_cnv(struct inode *inode)
103{
123static inline bool zonefs_inode_is_cnv(struct inode *inode)
124{
104 return zonefs_zone_is_cnv(ZONEFS_I(inode));
125 return zonefs_zone_is_cnv(zonefs_inode_zone(inode));
105}
106
107static inline bool zonefs_inode_is_seq(struct inode *inode)
108{
126}
127
128static inline bool zonefs_inode_is_seq(struct inode *inode)
129{
109 return zonefs_zone_is_seq(ZONEFS_I(inode));
130 return zonefs_zone_is_seq(zonefs_inode_zone(inode));
110}
111
112/*
113 * On-disk super block (block 0).
114 */
115#define ZONEFS_LABEL_LEN 64
116#define ZONEFS_UUID_SIZE 16
117#define ZONEFS_SUPER_SIZE 4096

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195
196 unsigned long long s_features;
197 kuid_t s_uid;
198 kgid_t s_gid;
199 umode_t s_perm;
200 uuid_t s_uuid;
201 unsigned int s_zone_sectors_shift;
202
131}
132
133/*
134 * On-disk super block (block 0).
135 */
136#define ZONEFS_LABEL_LEN 64
137#define ZONEFS_UUID_SIZE 16
138#define ZONEFS_SUPER_SIZE 4096

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216
217 unsigned long long s_features;
218 kuid_t s_uid;
219 kgid_t s_gid;
220 umode_t s_perm;
221 uuid_t s_uuid;
222 unsigned int s_zone_sectors_shift;
223
203 unsigned int s_nr_files[ZONEFS_ZTYPE_MAX];
224 struct zonefs_zone_group s_zgroup[ZONEFS_ZTYPE_MAX];
204
205 loff_t s_blocks;
206 loff_t s_used_blocks;
207
208 unsigned int s_max_wro_seq_files;
209 atomic_t s_wro_seq_files;
210
211 unsigned int s_max_active_seq_files;

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224#define zonefs_info(sb, format, args...) \
225 pr_info("zonefs (%s): " format, sb->s_id, ## args)
226#define zonefs_err(sb, format, args...) \
227 pr_err("zonefs (%s) ERROR: " format, sb->s_id, ## args)
228#define zonefs_warn(sb, format, args...) \
229 pr_warn("zonefs (%s) WARNING: " format, sb->s_id, ## args)
230
231/* In super.c */
225
226 loff_t s_blocks;
227 loff_t s_used_blocks;
228
229 unsigned int s_max_wro_seq_files;
230 atomic_t s_wro_seq_files;
231
232 unsigned int s_max_active_seq_files;

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245#define zonefs_info(sb, format, args...) \
246 pr_info("zonefs (%s): " format, sb->s_id, ## args)
247#define zonefs_err(sb, format, args...) \
248 pr_err("zonefs (%s) ERROR: " format, sb->s_id, ## args)
249#define zonefs_warn(sb, format, args...) \
250 pr_warn("zonefs (%s) WARNING: " format, sb->s_id, ## args)
251
252/* In super.c */
232void zonefs_account_active(struct inode *inode);
233int zonefs_zone_mgmt(struct inode *inode, enum req_op op);
253void zonefs_inode_account_active(struct inode *inode);
254int zonefs_inode_zone_mgmt(struct inode *inode, enum req_op op);
234void zonefs_i_size_write(struct inode *inode, loff_t isize);
235void zonefs_update_stats(struct inode *inode, loff_t new_isize);
236void __zonefs_io_error(struct inode *inode, bool write);
237
238static inline void zonefs_io_error(struct inode *inode, bool write)
239{
240 struct zonefs_inode_info *zi = ZONEFS_I(inode);
241

--- 17 unchanged lines hidden --- 		255void zonefs_i_size_write(struct inode *inode, loff_t isize);
256void zonefs_update_stats(struct inode *inode, loff_t new_isize);
257void __zonefs_io_error(struct inode *inode, bool write);
258
259static inline void zonefs_io_error(struct inode *inode, bool write)
260{
261 struct zonefs_inode_info *zi = ZONEFS_I(inode);
262

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