lib/libnandfs/nandfs.c

46 #include <fs/nandfs/nandfs_fs.h>
63 #define	NANDFS_ASSERT_VALID(fs)		assert((fs)->n_flags & NANDFS_IS_VALID)
64 #define	NANDFS_ASSERT_VALID_DEV(fs)	\
65 	assert(((fs)->n_flags & (NANDFS_IS_VALID | NANDFS_IS_OPENED_DEV)) == \
69 nandfs_iserror(struct nandfs *fs)
72 	NANDFS_ASSERT_VALID(fs);
74 	return (fs->n_flags & NANDFS_IS_ERROR);
78 nandfs_errmsg(struct nandfs *fs)
81 	NANDFS_ASSERT_VALID(fs);
83 	assert(nandfs_iserror(fs));
84 	assert(fs->n_errmsg);
85 	return (fs->n_errmsg);
89 nandfs_seterr(struct nandfs *fs, const char *fmt, ...)
94 	vsnprintf(fs->n_errmsg, sizeof(fs->n_errmsg), fmt, ap);
96 	fs->n_flags |= NANDFS_IS_ERROR;
100 nandfs_dev(struct nandfs *fs)
103 	NANDFS_ASSERT_VALID(fs);
104 	return (fs->n_dev);
108 nandfs_init(struct nandfs *fs, const char *dir)
111 	snprintf(fs->n_ioc, sizeof(fs->n_ioc), "%s/%s", dir, ".");
112 	fs->n_iocfd = -1;
113 	fs->n_flags = NANDFS_IS_VALID;
117 nandfs_destroy(struct nandfs *fs)
120 	assert(fs->n_iocfd == -1);
121 	fs->n_flags &=
123 	assert(fs->n_flags == 0);
127 nandfs_open(struct nandfs *fs)
131 	fs->n_flags |= NANDFS_IS_OPENED;
133 	fs->n_iocfd = open(fs->n_ioc, O_RDONLY, S_IRUSR | S_IWUSR | S_IRGRP |
135 	if (fs->n_iocfd == -1) {
136 		nandfs_seterr(fs, "couldn't open %s: %s", fs->n_ioc,
141 	if (ioctl(fs->n_iocfd, NANDFS_IOCTL_GET_FSINFO, &fsinfo) == -1) {
142 		nandfs_seterr(fs, "couldn't fetch fsinfo: %s",
147 	memcpy(&fs->n_fsdata, &fsinfo.fs_fsdata, sizeof(fs->n_fsdata));
148 	memcpy(&fs->n_sb, &fsinfo.fs_super, sizeof(fs->n_sb));
149 	snprintf(fs->n_dev, sizeof(fs->n_dev), "%s", fsinfo.fs_dev);
155 nandfs_close(struct nandfs *fs)
158 	NANDFS_ASSERT_VALID(fs);
159 	assert(fs->n_flags & NANDFS_IS_OPENED);
161 	close(fs->n_iocfd);
162 	fs->n_iocfd = -1;
163 	fs->n_flags &= ~NANDFS_IS_OPENED;
167 nandfs_get_cpstat(struct nandfs *fs, struct nandfs_cpstat *cpstat)
170 	NANDFS_ASSERT_VALID(fs);
172 	if (ioctl(fs->n_iocfd, NANDFS_IOCTL_GET_CPSTAT, cpstat) == -1) {
173 		nandfs_seterr(fs, "ioctl NANDFS_IOCTL_GET_CPSTAT: %s",
182 nandfs_get_cpinfo(struct nandfs *fs, uint64_t cno, int mode,
187 	NANDFS_ASSERT_VALID(fs);
194 	if (ioctl(fs->n_iocfd, NANDFS_IOCTL_GET_CPINFO, &args) == -1) {
195 		nandfs_seterr(fs, "ioctl NANDFS_IOCTL_GET_CPINFO: %s",
204 nandfs_get_cp(struct nandfs *fs, uint64_t cno, struct nandfs_cpinfo *cpinfo,
208 	return (nandfs_get_cpinfo(fs, cno, NANDFS_CHECKPOINT, cpinfo, nci));
212 nandfs_get_snap(struct nandfs *fs, uint64_t cno, struct nandfs_cpinfo *cpinfo,
216 	return (nandfs_get_cpinfo(fs, cno, NANDFS_SNAPSHOT, cpinfo, nci));
220 nandfs_make_snap(struct nandfs *fs, uint64_t *cno)
223 	NANDFS_ASSERT_VALID(fs);
225 	if (ioctl(fs->n_iocfd, NANDFS_IOCTL_MAKE_SNAP, cno) == -1) {
226 		nandfs_seterr(fs, "ioctl NANDFS_IOCTL_MAKE_SNAP: %s",
235 nandfs_delete_snap(struct nandfs *fs, uint64_t cno)
238 	NANDFS_ASSERT_VALID(fs);
240 	if (ioctl(fs->n_iocfd, NANDFS_IOCTL_DELETE_SNAP, &cno) == -1) {
241 		nandfs_seterr(fs, "ioctl NANDFS_IOCTL_DELETE_SNAP: %s",