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6 .TH CT_DEV_TMPL_SET_ASET 3CONTRACT "Aug 9, 2007"
8 ct_dev_tmpl_set_aset, ct_dev_tmpl_get_aset, ct_dev_tmpl_set_minor,
9 ct_dev_tmpl_get_minor, ct_dev_tmpl_set_noneg, ct_dev_tmpl_clear_noneg,
10 ct_dev_tmpl_get_noneg \- device contract template functions
14 cc [ \fIflag\fR\&.\|.\|. ] \fIfile\fR\&.\|.\|. \fB -lcontract \fR [ \fIlibrary\fR\&.\|.\|. ]
15 #include <libcontract.h>
16 #include <sys/contract/device.h>
18 int ct_dev_tmpl_set_aset(int fd, uint_t aset);
23 \fBint\fR \fBct_dev_tmpl_get_aset\fR(\fBint\fR \fIfd\fR, \fBuint_t *\fR\fIasetp\fR);
28 \fBint\fR \fBct_dev_tmpl_set_minor\fR(\fBint\fR \fIfd\fR, \fBchar *\fR\fIminor\fR);
33 \fBint\fR \fBct_dev_tmpl_get_minor\fR(\fBint\fR \fIfd\fR, \fBchar *\fR\fIbuf\fR, \fBsize_t *\fR\fIbuflenp\fR);
38 \fBint\fR \fBct_dev_tmpl_set_noneg\fR(\fBint\fR \fIfd\fR);
43 \fBint\fR \fBct_dev_tmpl_clear_noneg\fR(\fBint\fR \fIfd\fR);
48 \fBint\fR \fBct_dev_tmpl_get_noneg\fR(\fBint\fR \fIfd\fR, \fBuint_t *\fR\fInonegp\fR);
57 a bitset of one or more of device states
66 a pointer to a variable into which the current A-set is to be returned
75 a buffer into which the minor path is to be returned
84 a pointer to variable of type \fBsize_t\fR in which the size of the buffer
85 \fIbuf\fR is passed in. If the buffer is too small the size of the buffer
86 needed for a successful call is passed back to the caller.
95 a file descriptor from an open of the device contract template file in the
96 contract filesystem (ctfs)
105 the \fBdevfs\fR path (the \fB/devices\fR path without the "\fB/devices\fR"
106 prefix) of a minor which is to be the subject of a contract
115 a pointer to a \fIuint_t\fR variable for receiving the current setting of the
116 "nonnegotiable" term in the template
121 These functions read and write device contract terms and operate on device
122 contract template file descriptors obtained from the \fBcontract\fR(4)
126 The \fBct_dev_tmpl_set_aset()\fR and \fBct_dev_tmpl_get_aset()\fR functions
127 write and read the "acceptable states" set (or A-set for short). This is the
128 set of device states guaranteed by the contract. Any departure from these
129 states will result in the breaking of the contract and a delivery of a critical
130 contract event to the contract holder. The A-set value is a bitset of one or
131 more of the following device states: \fBCT_DEV_EV_ONLINE\fR,
132 \fBCT_DEV_EV_DEGRADED\fR, and \fBCT_DEV_EV_OFFLINE\fR.
135 The \fBct_dev_tmpl_set_minor()\fR and \fBct_dev_tmpl_get_minor()\fR functions
136 write and read the minor term (the device resource that is to be the subject of
137 the contract.) The value is a \fBdevfs\fR path to a device minor node (minus
138 the "\fB/devices\fR" prefix). For the \fBct_dev_tmpl_get_minor()\fR function, a
139 buffer at least \fBPATH_MAX\fR in size must be passed in. If the buffer is
140 smaller than \fBPATH_MAX\fR, then the minimum size of the buffer required
141 (\fBPATH_MAX\fR) for this function is passed back to the caller via the
142 \fIbuflenp\fR argument.
145 The \fBct_dev_tmpl_set_noneg()\fR and \fBct_dev_tmpl_get_noneg()\fR functions
146 write and read the nonnegotiable term. If this term is set, synchronous
147 negotiation events are automatically NACKed on behalf of the contract holder.
148 For \fBct_dev_tmpl_get_noneg()\fR, the variable pointed to by \fInonegp\fR is
149 set to 1 if the "noneg" term is set or to 0 otherwise. The
150 \fBct_dev_tmpl_clear_noneg()\fR term clears the nonnegotiable term from a
154 Upon successful completion, these functions return 0. Otherwise, they return a
155 non-zero error value.
158 The \fBct_dev_tmpl_set_aset()\fR function will fail if:
165 A template file descriptor or A-set is invalid
170 The \fBct_dev_tmpl_set_minor()\fR function will fail if:
177 One or more arguments is invalid.
186 The minor named by minor path does not exist.
191 The \fBct_dev_tmpl_set_noneg()\fR function will fail if:
198 A process lacks sufficient privilege to NACK a device state change.
203 The \fBct_dev_tmpl_get_aset()\fR and \fBct_dev_tmpl_get_minor()\fR functions
211 One or more arguments is invalid.
220 The requested term is not set.
225 The \fBct_dev_tmpl_get_noneg()\fR function will fail if:
232 One or more arguments is invalid.
237 The \fBct_dev_tmpl_get_minor()\fR function will fail if:
241 \fB\fBEOVERFLOW\fR\fR
244 The supplied buffer is too small.
249 See \fBattributes\fR(5) for descriptions of the following attributes:
257 ATTRIBUTE TYPE ATTRIBUTE VALUE
259 Interface Stability Committed
266 \fBlibcontract\fR(3LIB), \fBcontract\fR(4), \fBdevices\fR(4),