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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [fs/] [proc/] [inode.c] - Blame information for rev 1765

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/*
 *  linux/fs/proc/inode.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 */
 
/*
 * uClinux revisions for NO_MM
 * Copyright (C) 1998  Kenneth Albanowski <kjahds@kjahds.com>,
 *                     The Silver Hammer Group, Ltd.
 */
 
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/locks.h>
#include <linux/limits.h>
 
#include <asm/system.h>
#include <asm/segment.h>
 
static void proc_put_inode(struct inode *inode)
{
        if (inode->i_nlink)
                return;
        inode->i_size = 0;
}
 
static void proc_put_super(struct super_block *sb)
{
        lock_super(sb);
        sb->s_dev = 0;
        unlock_super(sb);
}
 
static struct super_operations proc_sops = {
        proc_read_inode,
        NULL,
        proc_write_inode,
        proc_put_inode,
        proc_put_super,
        NULL,
        proc_statfs,
        NULL
};
 
 
static int parse_options(char *options,uid_t *uid,gid_t *gid)
{
        char *this_char,*value;
 
        *uid = current->uid;
        *gid = current->gid;
        if (!options) return 1;
        for (this_char = strtok(options,","); this_char; this_char = strtok(NULL,",")) {
                if ((value = strchr(this_char,'=')) != NULL)
                        *value++ = 0;
                if (!strcmp(this_char,"uid")) {
                        if (!value || !*value)
                                return 0;
                        *uid = simple_strtoul(value,&value,0);
                        if (*value)
                                return 0;
                }
                else if (!strcmp(this_char,"gid")) {
                        if (!value || !*value)
                                return 0;
                        *gid = simple_strtoul(value,&value,0);
                        if (*value)
                                return 0;
                }
                else return 1;
        }
        return 1;
}
 
struct inode * proc_get_inode(struct super_block * s, int ino, struct proc_dir_entry * de)
{
        struct inode * inode = iget(s, ino);
        if (inode && inode->i_sb == s) {
                inode->u.generic_ip = (void *) de;
                if (de) {
                        if (de->mode) {
                                inode->i_mode = de->mode;
                                inode->i_uid = de->uid;
                                inode->i_gid = de->gid;
                        }
                        if (de->size)
                                inode->i_size = de->size;
                        if (de->ops)
                                inode->i_op = de->ops;
                        if (de->nlink)
                                inode->i_nlink = de->nlink;
                        if (de->fill_inode)
                                de->fill_inode(inode);
                }
        }
        return inode;
}
 
struct super_block *proc_read_super(struct super_block *s,void *data,
                                    int silent)
{
        proc_root_init();
        lock_super(s);
        s->s_blocksize = 1024;
        s->s_blocksize_bits = 10;
        s->s_magic = PROC_SUPER_MAGIC;
        s->s_op = &proc_sops;
        unlock_super(s);
        if (!(s->s_mounted = proc_get_inode(s, PROC_ROOT_INO, &proc_root))) {
                s->s_dev = 0;
                printk("get root inode failed\n");
                return NULL;
        }
        parse_options(data, &s->s_mounted->i_uid, &s->s_mounted->i_gid);
        return s;
}
 
void proc_statfs(struct super_block *sb, struct statfs *buf, int bufsiz)
{
        struct statfs tmp;
 
        tmp.f_type = PROC_SUPER_MAGIC;
        tmp.f_bsize = PAGE_SIZE/sizeof(long);
        tmp.f_blocks = 0;
        tmp.f_bfree = 0;
        tmp.f_bavail = 0;
        tmp.f_files = 0;
        tmp.f_ffree = 0;
        tmp.f_namelen = NAME_MAX;
        memcpy_tofs(buf, &tmp, bufsiz);
}
 
void proc_read_inode(struct inode * inode)
{
        unsigned long ino, pid;
        struct task_struct * p;
        int i;
 
        inode->i_op = NULL;
        inode->i_mode = 0;
        inode->i_uid = 0;
        inode->i_gid = 0;
        inode->i_nlink = 1;
        inode->i_size = 0;
        inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
        inode->i_blocks = 0;
        inode->i_blksize = 1024;
        ino = inode->i_ino;
        pid = ino >> 16;
        p = task[0];
        for (i = 0; i < NR_TASKS ; i++)
                if ((p = task[i]) && (p->pid == pid))
                        break;
        if (!p || i >= NR_TASKS)
                return;
        if (ino == PROC_ROOT_INO) {
                inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
                inode->i_nlink = 2;
                for (i = 1 ; i < NR_TASKS ; i++)
                        if (task[i])
                                inode->i_nlink++;
                return;
        }
 
        if (!pid) {
                switch (ino) {
                        case PROC_KMSG:
                                inode->i_mode = S_IFREG | S_IRUSR;
                                inode->i_op = &proc_kmsg_inode_operations;
                                break;
                        case PROC_NET:
                                inode->i_nlink = 2;
                                break;
                        case PROC_SCSI:
                                inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
                                inode->i_nlink = 2;
                                inode->i_op = &proc_scsi_inode_operations;
                                break;
                        case PROC_KCORE:
                                inode->i_mode = S_IFREG | S_IRUSR;
                                inode->i_op = &proc_kcore_inode_operations;
                                inode->i_size = (MAP_NR(high_memory) << PAGE_SHIFT) + PAGE_SIZE;
                                break;
                        case PROC_PROFILE:
                                inode->i_mode = S_IFREG | S_IRUGO | S_IWUSR;
                                inode->i_op = &proc_profile_inode_operations;
                                inode->i_size = (1+prof_len) * sizeof(unsigned long);
                                break;
                        default:
                                inode->i_mode = S_IFREG | S_IRUGO;
                                inode->i_op = &proc_array_inode_operations;
                                break;
                }
                return;
        }
        ino &= 0x0000ffff;
        if (ino == PROC_PID_INO || p->dumpable) {
                inode->i_uid = p->euid;
                inode->i_gid = p->egid;
        }
        switch (ino) {
                case PROC_PID_INO:
                        inode->i_nlink = 4;
                        return;
                case PROC_PID_MEM:
                        inode->i_op = &proc_mem_inode_operations;
                        inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR;
                        return;
                case PROC_PID_CWD:
                case PROC_PID_ROOT:
                case PROC_PID_EXE:
                        inode->i_op = &proc_link_inode_operations;
                        inode->i_size = 64;
                        inode->i_mode = S_IFLNK | S_IRWXU;
                        return;
                case PROC_PID_FD:
                        inode->i_mode = S_IFDIR | S_IRUSR | S_IXUSR;
                        inode->i_op = &proc_fd_inode_operations;
                        inode->i_nlink = 2;
                        return;
                case PROC_PID_ENVIRON:
                        inode->i_mode = S_IFREG | S_IRUSR;
                        inode->i_op = &proc_array_inode_operations;
                        return;
                case PROC_PID_CMDLINE:
                case PROC_PID_STATUS:
                case PROC_PID_STAT:
#ifndef NO_MM
                case PROC_PID_STATM:
#endif /* !NO_MM */
                        inode->i_mode = S_IFREG | S_IRUGO;
                        inode->i_op = &proc_array_inode_operations;
                        return;
#ifndef NO_MM
                case PROC_PID_MAPS:
                        inode->i_mode = S_IFIFO | S_IRUGO;
                        inode->i_op = &proc_arraylong_inode_operations;
                        return;
#endif /* !NO_MM */
        }
        switch (ino >> 8) {
                case PROC_PID_FD_DIR:
                        ino &= 0xff;
                        if (ino >= NR_OPEN || !p->files || !p->files->fd[ino])
                                return;
                        inode->i_op = &proc_link_inode_operations;
                        inode->i_size = 64;
                        inode->i_mode = S_IFLNK;
                        if (p->files->fd[ino]->f_mode & 1)
                                inode->i_mode |= S_IRUSR | S_IXUSR;
                        if (p->files->fd[ino]->f_mode & 2)
                                inode->i_mode |= S_IWUSR | S_IXUSR;
                        return;
        }
        return;
}
 
void proc_write_inode(struct inode * inode)
{
        inode->i_dirt=0;
}

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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [fs/] [proc/] [inode.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1628	jcastillo	`/*`
2			`* linux/fs/proc/inode.c`
3			`*`
4			`* Copyright (C) 1991, 1992 Linus Torvalds`
5			`*/`
6
7			`/*`
8			`* uClinux revisions for NO_MM`
9			`* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>,`
10			`* The Silver Hammer Group, Ltd.`
11			`*/`
12
13			`#include <linux/sched.h>`
14			`#include <linux/proc_fs.h>`
15			`#include <linux/kernel.h>`
16			`#include <linux/mm.h>`
17			`#include <linux/string.h>`
18			`#include <linux/stat.h>`
19			`#include <linux/locks.h>`
20			`#include <linux/limits.h>`
21
22			`#include <asm/system.h>`
23			`#include <asm/segment.h>`
24
25			`static void proc_put_inode(struct inode *inode)`
26			`{`
27			`if (inode->i_nlink)`
28			`return;`
29			`inode->i_size = 0;`
30			`}`
31
32			`static void proc_put_super(struct super_block *sb)`
33			`{`
34			`lock_super(sb);`
35			`sb->s_dev = 0;`
36			`unlock_super(sb);`
37			`}`
38
39			`static struct super_operations proc_sops = {`
40			`proc_read_inode,`
41			`NULL,`
42			`proc_write_inode,`
43			`proc_put_inode,`
44			`proc_put_super,`
45			`NULL,`
46			`proc_statfs,`
47			`NULL`
48			`};`
49
50
51			`static int parse_options(char options,uid_t uid,gid_t *gid)`
52			`{`
53			`char this_char,value;`
54
55			`*uid = current->uid;`
56			`*gid = current->gid;`
57			`if (!options) return 1;`
58			`for (this_char = strtok(options,","); this_char; this_char = strtok(NULL,",")) {`
59			`if ((value = strchr(this_char,'=')) != NULL)`
60			`*value++ = 0;`
61			`if (!strcmp(this_char,"uid")) {`
62			`if (!value \|\| !*value)`
63			`return 0;`
64			`*uid = simple_strtoul(value,&value,0);`
65			`if (*value)`
66			`return 0;`
67			`}`
68			`else if (!strcmp(this_char,"gid")) {`
69			`if (!value \|\| !*value)`
70			`return 0;`
71			`*gid = simple_strtoul(value,&value,0);`
72			`if (*value)`
73			`return 0;`
74			`}`
75			`else return 1;`
76			`}`
77			`return 1;`
78			`}`
79
80			`struct inode * proc_get_inode(struct super_block * s, int ino, struct proc_dir_entry * de)`
81			`{`
82			`struct inode * inode = iget(s, ino);`
83			`if (inode && inode->i_sb == s) {`
84			`inode->u.generic_ip = (void *) de;`
85			`if (de) {`
86			`if (de->mode) {`
87			`inode->i_mode = de->mode;`
88			`inode->i_uid = de->uid;`
89			`inode->i_gid = de->gid;`
90			`}`
91			`if (de->size)`
92			`inode->i_size = de->size;`
93			`if (de->ops)`
94			`inode->i_op = de->ops;`
95			`if (de->nlink)`
96			`inode->i_nlink = de->nlink;`
97			`if (de->fill_inode)`
98			`de->fill_inode(inode);`
99			`}`
100			`}`
101			`return inode;`
102			`}`
103
104			`struct super_block proc_read_super(struct super_block s,void *data,`
105			`int silent)`
106			`{`
107			`proc_root_init();`
108			`lock_super(s);`
109			`s->s_blocksize = 1024;`
110			`s->s_blocksize_bits = 10;`
111			`s->s_magic = PROC_SUPER_MAGIC;`
112			`s->s_op = &proc_sops;`
113			`unlock_super(s);`
114			`if (!(s->s_mounted = proc_get_inode(s, PROC_ROOT_INO, &proc_root))) {`
115			`s->s_dev = 0;`
116			`printk("get root inode failed\n");`
117			`return NULL;`
118			`}`
119			`parse_options(data, &s->s_mounted->i_uid, &s->s_mounted->i_gid);`
120			`return s;`
121			`}`
122
123			`void proc_statfs(struct super_block sb, struct statfs buf, int bufsiz)`
124			`{`
125			`struct statfs tmp;`
126
127			`tmp.f_type = PROC_SUPER_MAGIC;`
128			`tmp.f_bsize = PAGE_SIZE/sizeof(long);`
129			`tmp.f_blocks = 0;`
130			`tmp.f_bfree = 0;`
131			`tmp.f_bavail = 0;`
132			`tmp.f_files = 0;`
133			`tmp.f_ffree = 0;`
134			`tmp.f_namelen = NAME_MAX;`
135			`memcpy_tofs(buf, &tmp, bufsiz);`
136			`}`
137
138			`void proc_read_inode(struct inode * inode)`
139			`{`
140			`unsigned long ino, pid;`
141			`struct task_struct * p;`
142			`int i;`
143
144			`inode->i_op = NULL;`
145			`inode->i_mode = 0;`
146			`inode->i_uid = 0;`
147			`inode->i_gid = 0;`
148			`inode->i_nlink = 1;`
149			`inode->i_size = 0;`
150			`inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;`
151			`inode->i_blocks = 0;`
152			`inode->i_blksize = 1024;`
153			`ino = inode->i_ino;`
154			`pid = ino >> 16;`
155			`p = task[0];`
156			`for (i = 0; i < NR_TASKS ; i++)`
157			`if ((p = task[i]) && (p->pid == pid))`
158			`break;`
159			`if (!p \|\| i >= NR_TASKS)`
160			`return;`
161			`if (ino == PROC_ROOT_INO) {`
162			`inode->i_mode = S_IFDIR \| S_IRUGO \| S_IXUGO;`
163			`inode->i_nlink = 2;`
164			`for (i = 1 ; i < NR_TASKS ; i++)`
165			`if (task[i])`
166			`inode->i_nlink++;`
167			`return;`
168			`}`
169
170			`if (!pid) {`
171			`switch (ino) {`
172			`case PROC_KMSG:`
173			`inode->i_mode = S_IFREG \| S_IRUSR;`
174			`inode->i_op = &proc_kmsg_inode_operations;`
175			`break;`
176			`case PROC_NET:`
177			`inode->i_nlink = 2;`
178			`break;`
179			`case PROC_SCSI:`
180			`inode->i_mode = S_IFDIR \| S_IRUGO \| S_IXUGO;`
181			`inode->i_nlink = 2;`
182			`inode->i_op = &proc_scsi_inode_operations;`
183			`break;`
184			`case PROC_KCORE:`
185			`inode->i_mode = S_IFREG \| S_IRUSR;`
186			`inode->i_op = &proc_kcore_inode_operations;`
187			`inode->i_size = (MAP_NR(high_memory) << PAGE_SHIFT) + PAGE_SIZE;`
188			`break;`
189			`case PROC_PROFILE:`
190			`inode->i_mode = S_IFREG \| S_IRUGO \| S_IWUSR;`
191			`inode->i_op = &proc_profile_inode_operations;`
192			`inode->i_size = (1+prof_len) * sizeof(unsigned long);`
193			`break;`
194			`default:`
195			`inode->i_mode = S_IFREG \| S_IRUGO;`
196			`inode->i_op = &proc_array_inode_operations;`
197			`break;`
198			`}`
199			`return;`
200			`}`
201			`ino &= 0x0000ffff;`
202			`if (ino == PROC_PID_INO \|\| p->dumpable) {`
203			`inode->i_uid = p->euid;`
204			`inode->i_gid = p->egid;`
205			`}`
206			`switch (ino) {`
207			`case PROC_PID_INO:`
208			`inode->i_nlink = 4;`
209			`return;`
210			`case PROC_PID_MEM:`
211			`inode->i_op = &proc_mem_inode_operations;`
212			`inode->i_mode = S_IFREG \| S_IRUSR \| S_IWUSR;`
213			`return;`
214			`case PROC_PID_CWD:`
215			`case PROC_PID_ROOT:`
216			`case PROC_PID_EXE:`
217			`inode->i_op = &proc_link_inode_operations;`
218			`inode->i_size = 64;`
219			`inode->i_mode = S_IFLNK \| S_IRWXU;`
220			`return;`
221			`case PROC_PID_FD:`
222			`inode->i_mode = S_IFDIR \| S_IRUSR \| S_IXUSR;`
223			`inode->i_op = &proc_fd_inode_operations;`
224			`inode->i_nlink = 2;`
225			`return;`
226			`case PROC_PID_ENVIRON:`
227			`inode->i_mode = S_IFREG \| S_IRUSR;`
228			`inode->i_op = &proc_array_inode_operations;`
229			`return;`
230			`case PROC_PID_CMDLINE:`
231			`case PROC_PID_STATUS:`
232			`case PROC_PID_STAT:`
233			`#ifndef NO_MM`
234			`case PROC_PID_STATM:`
235			`#endif /* !NO_MM */`
236			`inode->i_mode = S_IFREG \| S_IRUGO;`
237			`inode->i_op = &proc_array_inode_operations;`
238			`return;`
239			`#ifndef NO_MM`
240			`case PROC_PID_MAPS:`
241			`inode->i_mode = S_IFIFO \| S_IRUGO;`
242			`inode->i_op = &proc_arraylong_inode_operations;`
243			`return;`
244			`#endif /* !NO_MM */`
245			`}`
246			`switch (ino >> 8) {`
247			`case PROC_PID_FD_DIR:`
248			`ino &= 0xff;`
249			`if (ino >= NR_OPEN \|\| !p->files \|\| !p->files->fd[ino])`
250			`return;`
251			`inode->i_op = &proc_link_inode_operations;`
252			`inode->i_size = 64;`
253			`inode->i_mode = S_IFLNK;`
254			`if (p->files->fd[ino]->f_mode & 1)`
255			`inode->i_mode \|= S_IRUSR \| S_IXUSR;`
256			`if (p->files->fd[ino]->f_mode & 2)`
257			`inode->i_mode \|= S_IWUSR \| S_IXUSR;`
258			`return;`
259			`}`
260			`return;`
261			`}`
262
263			`void proc_write_inode(struct inode * inode)`
264			`{`
265			`inode->i_dirt=0;`
266			`}`